Technical field
[0001]
The present invention relates to the field of communication, in particular to a random access method, a data receiving method and its device, and a communication system.
Background technique
[0002]
The random access process is an important process for realizing the initial access and uplink synchronization of terminal equipment. The random access process includes contention-based random access process and non-competition-based random access process. The random access process is based on non-competition During the random access process, the success of the random access process refers to the successful reception of the random access response message (Msg.2), and the failure of the random access process refers to when the transmission of the random access preamble related to Msg.2 reaches the maximum When the number of times or the related random process exceeds the predetermined time, the user has not successfully received Msg.2; when the random access process is a contention-based random access process, the success of the random access process refers to the contention resolution message (Msg.4) Successful reception and random access process failure means that when the random access preamble related to Msg.4 has been sent the maximum number of times or the related random process exceeds the predetermined time, the user has not successfully received Msg.4.
[0003]
It should be noted that the above introduction to the technical background is only for the convenience of a clear and complete description of the technical solutions of the present invention and to facilitate the understanding of those skilled in the art. It should not be considered that the above technical solutions are well-known to those skilled in the art just because these solutions are described in the background art part of the present invention.
[0004]
Summary of the invention
[0005]
The inventor found that the above method for determining the success of the random access process is only for a single carrier scenario, but when the network device configures multiple carriers for the terminal device, the cell where the random access process is initiated and the cell where the random access response is received It may be the same or different. Figures 1B-1C are schematic diagrams of the same and different scenarios respectively. As shown in Figure 1B, after cell 1 initiates the random access process, cell 1 is still receiving the random access response, as shown in Figure 1C. It shows that after cell 1 initiates the random access procedure, cell 2 may receive the random access response.
[0006]
At present, there is no perfect method for determining whether the random access process is successful in a multi-carrier scenario in the prior art.
[0007]
In order to solve the foregoing problems, embodiments of the present invention provide a random access method, a data receiving method and device, and a communication system.
[0008]
According to the first aspect of this embodiment, there is provided a random access device, wherein the device includes:
[0009]
A first sending unit, which is used to send a random access preamble to a network device;
[0010]
The first determining unit is used to determine when the terminal device receives the first notification, or when the terminal device receives the first notification and satisfies the condition of the first cell related to the random access preamble The random access procedure corresponding to the random access preamble is successfully completed;
[0011]
Wherein, the first notification is a notification sent from the lower layer of the terminal device that the downlink control channel transmission in the first cell is received, and/or sent from the lower layer to feed back the Notification of the downlink control channel transmission of the random access preamble.
[0012]
According to a second aspect of this embodiment, there is provided a random access device, wherein the device includes:
[0013]
A second sending unit, which is used to send a random access preamble to a network device;
[0014]
The second determining unit is used when the terminal device has received the downlink allocation on the downlink control channel, and the received corresponding transport block is successfully decoded, or when the terminal device has received the downlink allocation on the downlink control channel, and When the received corresponding transport block is successfully decoded and the condition of the first cell related to the random access preamble is met, determining that the random access process corresponding to the random access preamble is successfully completed;
[0015]
Wherein, the downlink control channel is a downlink control channel of the second cell and/or a downlink control channel for feeding back the random access preamble.
[0016]
According to a third aspect of this embodiment, there is provided a data receiving device, wherein the device includes:
[0017]
A third sending unit, which is used to send a random access preamble to a network device;
[0018]
A monitoring unit for monitoring downlink control information in the second cell; wherein the downlink control information is related to the random access preamble;
[0019]
The receiving unit is configured to receive the downlink data scheduled by the downlink control information in a first cell, where the first cell and the second cell are different.
[0020]
According to a fourth aspect of this embodiment, there is provided a random access method, wherein the method includes:
[0021]
The terminal device sends a random access preamble to the network device;
[0022]
When the terminal device receives the first notification, or when the terminal device receives the first notification and satisfies the condition of the first cell related to the random access preamble, the terminal device determines (consider) The random access process corresponding to the random access preamble is successfully completed;
[0023]
Wherein, the first notification is a notification sent from the bottom layer to receive a downlink control channel transmission in the first cell, and/or a notification sent from the bottom layer to receive a downlink control channel transmission for feeding back the random access preamble announcement of.
[0024]
According to a fifth aspect of this embodiment, there is provided a random access method, wherein the method includes:
[0025]
The terminal device sends a random access preamble to the network device;
[0026]
When the terminal device has received the downlink allocation on the downlink control channel, and the received corresponding transport block is successfully decoded, or when the terminal device has received the downlink allocation on the downlink control channel, and the received corresponding When the transmission block of is successfully decoded and the condition of the first cell related to the random access preamble is satisfied, the terminal device determines that the random access process corresponding to the random access preamble is successfully completed;
[0027]
Wherein, the downlink control channel is a downlink control channel of the second cell and/or a downlink control channel for feeding back the random access preamble.
[0028]
According to a sixth aspect of this embodiment, there is provided a data sending method, wherein the method includes:
[0029]
The network device receives the random access preamble sent by the terminal device;
[0030]
The network device sends downlink control information to the terminal device in the second cell; wherein the downlink control information is related to the random access preamble;
[0031]
The network device sends the downlink data scheduled by the downlink control information to the terminal device in a first cell, where the first cell and the second cell are different.
[0032]
According to a seventh aspect of this embodiment, there is provided a communication system including a terminal device, the terminal device including the random access device of the foregoing first aspect or the second aspect, or the data receiving device of the foregoing third aspect .
[0033]
The beneficial effect of the embodiments of the present invention is that the success of the random access process is determined according to the relationship between the received downlink control channel and the random access preamble sent by the cell or terminal equipment, thereby solving the problems in the prior art. It can send and receive data accurately, thereby increasing the success rate, reducing the number of retransmissions, and saving energy.
[0034]
With reference to the following description and drawings, specific embodiments of the present invention are disclosed in detail, indicating the ways in which the principles of the present invention can be adopted. It should be understood that the scope of the embodiments of the present invention is not limited thereby. Within the scope of the terms of the appended claims, the embodiments of the present invention include many changes, modifications and equivalents.
[0035]
Features described and/or shown for one embodiment can be used in one or more other embodiments in the same or similar manner, combined with features in other embodiments, or substituted for features in other embodiments .
[0036]
It should be emphasized that the term "comprising/comprising" when used herein refers to the existence of a feature, a whole, a step or a component, but does not exclude the existence or addition of one or more other features, a whole, a step or a component.
Description of the drawings
[0037]
The elements and features described in one drawing or one embodiment of the present invention may be combined with the elements and features shown in one or more other drawings or embodiments. In addition, in the drawings, similar reference numerals indicate corresponding parts in several drawings, and may be used to indicate corresponding parts used in more than one embodiment.
[0038]
The included drawings are used to provide a further understanding of the embodiments of the present invention, which constitute a part of the specification, are used to illustrate the embodiments of the present invention, and together with the text description, explain the principle of the present invention. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative labor.
[0039]
In the attached picture:
[0040]
FIG. 1A is a schematic diagram of the communication system of this embodiment;
[0041]
Figures 1B-1C are schematic diagrams of scenarios in this embodiment;
[0042]
2 is a flowchart of the random access method in Embodiment 1;
[0043]
Figure 3 is a flow chart of the random access method in embodiment 2;
[0044]
4 is a flowchart of the random access method in Embodiment 3;
[0045]
Fig. 5 is a flowchart of the random access method in embodiment 4;
[0046]
FIG. 6 is a flowchart of the data receiving method in Embodiment 5;
[0047]
FIG. 7 is a flowchart of the data sending method in Embodiment 6;
[0048]
8 is a schematic diagram of the structure of a random access device in Embodiment 7;
[0049]
9 is a schematic diagram of the structure of a random access device in Embodiment 8;
[0050]
10 is a schematic diagram of the structure of the data receiving device in Embodiment 9;
[0051]
11 is a schematic diagram of the structure of a data sending device in Embodiment 10;
[0052]
FIG. 12 is a schematic diagram of the structure of a network device in Embodiment 11;
[0053]
13 is a schematic diagram of the structure of a terminal device in Embodiment 11;
[0054]
FIG. 14 is a flowchart of a data receiving and sending method in Embodiment 11.
Detailed ways
[0055]
With reference to the drawings, the foregoing and other features of the present invention will become apparent through the following description. In the specification and drawings, specific embodiments of the present invention are specifically disclosed, which indicate some embodiments in which the principles of the present invention can be adopted. It should be understood that the present invention is not limited to the described embodiments. On the contrary, the present invention The invention includes all modifications, variations and equivalents falling within the scope of the appended claims. Various embodiments of the present invention will be described below in conjunction with the drawings. These embodiments are only exemplary, and are not limitations to the present invention.
[0056]
In the embodiments of the present invention, the terms "first", "second", etc. are used to distinguish different elements from the terms, but they do not indicate the spatial arrangement or temporal order of these elements, and these elements should not be used Limited. The term "and/or" includes any and all combinations of one or more of the associated listed terms. The terms "comprising", "including", "having" and the like refer to the existence of the stated features, elements, elements or components, but do not exclude the presence or addition of one or more other features, elements, elements or components.
[0057]
In the embodiments of the present invention, the singular forms "a", "the", etc. include plural forms, which should be broadly understood as "a" or "a type" rather than being limited to the meaning of "a"; in addition, the term "so" "Said" should be understood to include both singular and plural forms, unless the context clearly indicates otherwise. In addition, the term "based on" should be understood as "based at least in part on...", and the term "based on" should be understood as "based at least in part on..." unless the context clearly dictates otherwise.
[0058]
In the embodiments of the present invention, the term "communication network" or "wireless communication network" may refer to a network that meets any of the following communication standards, such as the fifth generation of new radio access (5G NR, New Radio Access), long-term evolution (LTE, Long Term Evolution), Enhanced Long Term Evolution (LTE-A, LTE-Advanced), Wideband Code Division Multiple Access (WCDMA, Wideband Code Division Multiple Access), High-Speed ​​Packet Access (HSPA, High-Speed ​​Packet Access) and many more.
[0059]
In addition, the communication between devices in the communication system can be carried out according to any stage of communication protocol, for example, it can include but not limited to the following communication protocols: 1G (generation), 2G, 2.5G, 2.75G, 3G, 4G, 4.5G and 5G , New Radio (NR, New Radio), etc., and/or other currently known or future communication protocols.
[0060]
In the embodiment of the present invention, the term “network device” refers to, for example, a device in a communication system that connects a terminal device to a communication network and provides services for the terminal device. Network equipment may include but is not limited to the following equipment: base station (BS, Base Station), access point (AP, Access Point), transmission and reception point (TRP, Transmission Reception Point), broadcast transmitter, mobile management entity (MME, Mobile Management Entity), gateway, server, radio network controller (RNC, Radio Network Controller), base station controller (BSC, Base Station Controller), etc.
[0061]
Among them, the base station may include but is not limited to: Node B (NodeB or NB), evolved Node B (eNodeB or eNB) and 5G base station (gNB), etc., and may also include remote radio head (RRH, Remote Radio Head) , Remote Radio Unit (RRU, Remote Radio Unit), relay (relay) or low-power node (such as femto, pico, etc.). And the term "base station" can include some or all of their functions, and each base station can provide communication coverage for a specific geographic area. The term "cell" can refer to a base station and/or its coverage area, and can also be expressed as a serving cell, which can be a macro cell or a small cell, depending on the context in which the term is used.
[0062]
In the embodiment of the present invention, the term "User Equipment" (UE, User Equipment) or "Terminal Equipment" (TE, Terminal Equipment), for example, refers to a device that accesses a communication network through a network device and receives network services. The terminal device may be fixed or mobile, and may also be called a mobile station (MS, Mobile Station), terminal, subscriber station (SS, Subscriber Station), access terminal (AT, Access Terminal), station, etc.
[0063]
Among them, terminal devices may include but are not limited to the following devices: cellular phones (Cellular Phone), personal digital assistants (PDAs, Personal Digital Assistant), wireless modems, wireless communication devices, handheld devices, machine-type communication devices, laptop computers, Cordless phones, smart phones, smart watches, digital cameras, etc.
[0064]
For another example, in scenarios such as the Internet of Things (IoT), the terminal device may also be a machine or device that performs monitoring or measurement. For example, it may include but is not limited to: Machine Type Communication (MTC) terminals, Vehicle-mounted communication terminals, device to device (D2D, Device to Device) terminals, machine to machine (M2M, Machine to Machine) terminals, etc.
[0065]
The following describes the scenarios of the embodiments of the present invention through examples, but the present invention is not limited to this.
[0066]
FIG. 1A is a schematic diagram of a communication system according to an embodiment of the present invention, which schematically illustrates a case where user equipment and network equipment are taken as examples. As shown in FIG. 1A, the communication system 100 may include a network device 101 and a terminal device 102. For the sake of simplicity, FIG. 1A only uses one terminal device and one network device as an example for description, but the embodiment of the present invention is not limited to this.
[0067]
In the embodiment of the present invention, the network device 101 and the terminal device 102 can perform existing service or future service transmission. For example, these services may include, but are not limited to: enhanced Mobile Broadband (eMBB), massive machine type communication (mMTC), and high-reliability and low-latency communication (URLLC, Ultra-Reliable and Low -Latency Communication), etc.
[0068]
In future high-frequency communication scenarios, communication links are susceptible to physical conditions, such as weather, obstacles, changes in direction and angle, and other factors, resulting in transmission failure in the original beam direction. The beam failure recovery technology is mainly aimed at this scenario, using the measurement results of beam power in different directions to quickly locate a new and reliable beam direction, thereby completing the rapid recovery of the link. The beam failure recovery technology is not only very effective in single-carrier communication scenarios, but it can also play an important role in multi-carrier scenarios. The beam failure recovery process can be implemented based on the random access process. For example, for the random access procedure for beam failure recovery (random access procedure for beam failure recovery), the terminal device sends a beam failure recovery request through the physical random access channel, and the beam fails. The recovery request is the corresponding random access preamble, notifying the network equipment of the beam failure, and notifying the network equipment of the previously maintained backup beam number, and switching the beam of the terminal equipment to the backup beam. After the network equipment receives the beam failure recovery request , Switch its own beam to the backup beam notified by the terminal, and send a beam failure recovery response on this beam, and the beam failure recovery response is the corresponding random access response (RAR, Random Access Response), and the terminal device is in When it is determined that some conditions are met, it is determined that the beam failure recovery process is successful. The embodiment of the present invention will describe the implementation of the above conditions.
[0069]
It is worth noting that the embodiment of the present invention takes the random access process corresponding to the beam failure recovery process as an example for description, but the present invention is not limited to this, and the present invention is also applicable to other scenarios where the random access process is applied.
[0070]
The embodiments of the present invention will be described below in conjunction with the drawings.
[0071]
Example 1
[0072]
Fig. 2 is a flow chart of the random access method of this embodiment 1, which is applied to the terminal device side. As shown in Figure 2, the method includes:
[0073]
Step 201: The terminal device sends a random access preamble to the network device;
[0074]
Step 202: When the terminal device receives the first notification, the terminal device determines that the random access process corresponding to the random access preamble is successfully completed;
[0075]
The first notification is a notification sent from the bottom layer to receive a downlink control channel transmission in the first cell, and/or a notification sent from the bottom layer to receive a downlink control channel transmission for feeding back the random access preamble.
[0076]
In this embodiment, in step 201, the terminal device may initiate a random access procedure in the first cell. For example, the terminal device sends a random access preamble to the network device in the first cell. In one embodiment, the terminal device The random access preamble in the random access preamble set can be selected, and the resources in the random access resource set are used to send the random access preamble; in one embodiment, the network device can allocate dedicated random access to the terminal device Preamble, and/or random access resources (such as random access channel resources (RACH Resource), and/or random access preamble format (Random Access Preamble Format), the terminal device sends the random access preamble according to the network side allocation; The random access preamble part is mapped to the physical layer on the physical random access channel (PRACH). After the terminal device sends the random access preamble, the terminal device ignores the possible measurement interval.
[0077]
In step 201, the random access process may be a random access process for the beam failure recovery process, and the random access preamble may be a beam failure recovery request, which is used to notify the network device of the beam failure and the media access of the terminal device. The MAC entity can send the non-contention random access preamble corresponding to the beam failure recovery request, but this embodiment is not limited by this. The random access process can also be in other scenarios (such as handover, reconstruction) Initiated, the random access preamble is not limited to the corresponding beam failure recovery request.
[0078]
In this embodiment, after receiving the random access preamble of the terminal device, the network device will feed back the random access response to the terminal device. For example, the physical downlink control channel (PDCCH) carries the random access response, and the terminal device monitors the random access response. PDCCH transmission or monitoring the PDCCH transmission related to the random access preamble to determine whether the control information sent by the network device can be successfully received, and then to determine whether the random access process is successful, but in the multi-carrier scenario, the network device will be the terminal The device is configured with multiple carriers, and the serving cell (corresponding carrier) of the terminal device may change. That is, the current serving cell (second cell) may be different or the same as the serving cell (first cell) in step 201. The cell is the cell where the downlink control channel transmission of the random access preamble is monitored and fed back; or is a special cell (SpCell), and the special cell may include at least one of the following: the primary cell of the primary cell group (MCG) in the case of dual connectivity (PCell); the primary cell (PSCell) of the secondary cell group (SCG) in the case of dual connectivity; the primary cell in the case of non-dual connectivity; but the present invention is not limited to this. Therefore, even if the PDCCH transmission is received, it cannot be directly determined that the PDCCH transmission is a random access response to the random access preamble sent in step 201, and thus it is impossible to determine whether the random access process is successful (completed).
[0079]
Therefore, in this embodiment, before step 202, the method may further include: (not shown) the bottom layer of the terminal device receives the downlink control channel transmission.
[0080]
In this embodiment, the lower layer of the terminal device is defined relative to the higher layer of the terminal device. The lower layer of the terminal device may be the physical layer of the terminal device, and the upper layer of the terminal device may be the MAC layer or the radio resource. For the control (RRC) layer, its specific meaning refers to the definition of the prior art, and this embodiment is not limited by this.
[0081]
In one embodiment, the downlink control channel transmission is the downlink control channel transmission of the first cell; the first cell is the cell where the random access process corresponding to the random access preamble is initiated; or the random access is sent The cell where the preamble is located. The bottom layer of the terminal device sends a first notification of receiving the downlink control channel transmission to the MAC entity of the terminal device. In step 202, when the MAC entity of the terminal device receives the first notification, it determines (or considers to consider ) The random access procedure corresponding to the random access preamble is successfully completed. Since it is determined that the downlink control channel transmission is the downlink control channel transmission of the first cell, the first cell is the cell where the random access process corresponding to the random access preamble is initiated; or the cell where the random access preamble is sent Therefore, the terminal device can infer that the downlink control channel of the first cell can already communicate normally, and can determine that the random access process corresponding to the random access preamble in step 201 is successfully completed.
[0082]
In one embodiment, the downlink control channel transmission is to feed back the downlink control channel transmission of the random access preamble in step 201; the bottom layer of the terminal device sends the first downlink control channel transmission received to the MAC entity of the terminal device. A notification, for example, the downlink control channel transmission is to feed back the downlink control channel transmission of the beam recovery failure request; in step 202, when the MAC entity of the terminal device receives the first notification, it is determined (or considered) and The random access process corresponding to the random access preamble (for example, the beam failure recovery request) is successfully completed. Since it is determined that the downlink control channel transmission is to feed back the downlink control channel transmission of the random access preamble, it is determined that the downlink control channel transmission is a response to the random access preamble in step 201, and then it can be determined that it is the same as the random access preamble in step 201. The random access procedure corresponding to the access preamble is successfully completed.
[0083]
In this embodiment, the above two implementation manners can be implemented separately or in combination. For example, the downlink control channel transmission is the downlink control channel transmission of the first cell in order to feed back the random access preamble in step 201. This embodiment Not as a restriction.
[0084]
In this embodiment, the downlink control channel transmission is addressed to the cell radio network temporary identification (C-RNTI) or the random access radio network temporary identification (RA-RNTI). For example, the downlink control channel is controlled by the C-RNTI. -For RNTI or RA-RNTI scrambling, the specific scrambling method can refer to the prior art, which is not repeated here.
[0085]
In this embodiment, after step 202, since the random access process is successfully completed, the method further includes: (not shown) the terminal device stops sending or receiving uplink and downlink signals related to the random access process. For example, the terminal device stops sending the random access preamble corresponding to the random access procedure, and/or the terminal device stops receiving the random access response corresponding to the random access procedure, and/or the terminal device stops sending the random access The uplink transmission indicated by the random access response corresponding to the process is not limited in this embodiment.
[0086]
Through the above-mentioned embodiments, the success of the random access process is determined according to the relationship between the downlink control channel transmission and the random access preamble sent by the cell or the terminal device. Thus, the terminal device can accurately send and receive data, thereby increasing the success rate and reducing retransmissions. Times to save energy. .
[0087]
Example 2
[0088]
Fig. 3 is a flow chart of the random access method of the second embodiment, which is applied to the terminal device side. As shown in Figure 3, the method includes:
[0089]
Step 301: The terminal device sends a random access preamble to the network device;
[0090]
Step 302: When the terminal device receives the first notification and satisfies the condition of the first cell related to the random access preamble, the terminal device determines that the random access process corresponding to the random access preamble is successfully completed;
[0091]
The first notification is a notification sent from the bottom layer to receive a downlink control channel transmission in the first cell, and/or a notification sent from the bottom layer to receive a downlink control channel transmission for feeding back the random access preamble.
[0092]
In this embodiment, for the implementation of step 301, please refer to step 201 in embodiment 1, which will not be repeated here.
[0093]
In this embodiment, before step 302, the method may further include: (not shown) the bottom layer of the terminal device receives the downlink control channel transmission, and sends to the MAC entity of the terminal device that the downlink control channel transmission is received. First notice, please refer to Embodiment 1 for the specific implementation of the downlink control channel transmission, which will not be repeated here.
[0094]
In this embodiment, the difference from Embodiment 1 is that, in Embodiment 1, the terminal device receives the first notification, that is, it is determined that the random access process corresponding to the random access preamble is successfully completed. In this embodiment, in addition to receiving the first notification, the terminal device also needs to determine whether the condition of the first cell related to the random access preamble is satisfied. When the first notification is received and the condition is satisfied, The terminal device determines that the random access procedure corresponding to the random access preamble is successfully completed.
[0095]
In this embodiment, the condition of the first cell related to the random access preamble is that the first cell is the same as the second cell, or the first cell is different from the second cell, the specifics of the first cell and the second cell are For the meaning, please refer to Embodiment 1, which will not be repeated here.
[0096]
In one embodiment, the downlink control channel transmission is the downlink control channel transmission of the first cell. The bottom layer of the terminal device sends a first notification of receiving the downlink control channel transmission to the MAC entity of the terminal device. In step 302, the MAC entity of the terminal device receives the first notification, and the first cell and the first cell When the two cells are the same, it is determined (or considered to consider) that the random access procedure corresponding to the random access preamble is successfully completed. Since the first cell and the second cell are the same, it is determined that the downlink control channel transmission is the downlink control channel transmission of the first cell and/or the second cell, and the terminal device can guess the downlink control channel of the first cell and/or the second cell The control channel can already communicate normally, and it can be determined that the random access process corresponding to the random access preamble in step 301 is successfully completed.
[0097]
In one embodiment, the downlink control channel transmission is to feed back the downlink control channel transmission of the random access preamble in step 301; the bottom layer of the terminal device sends the first downlink control channel transmission to the MAC entity of the terminal device. A notification, for example, the downlink control channel transmission is to feed back the downlink control channel transmission of the beam recovery failure request; in step 302, the MAC entity of the terminal device receives the first notification, and the first cell and the second cell At the same time, it is determined (or considered to consider) that the random access procedure corresponding to the random access preamble (for example, a beam failure recovery request) is successfully completed. Since it is determined that the downlink control channel transmission is to feed back the downlink control channel transmission of the random access preamble, it is determined that the downlink control channel transmission is the response to the random access preamble in step 301 (beam failure recovery request response), and then It can be determined that the random access process corresponding to the random access preamble in step 301 is successfully completed.
[0098]
In this embodiment, the above two implementation manners can be implemented separately or in combination. For example, the downlink control channel transmission is the downlink control channel transmission of the first cell in order to feed back the random access preamble in step 301. This embodiment Not as a restriction.
[0099]
In one embodiment, the downlink control channel transmission is the downlink control channel transmission of the first cell. The bottom layer of the terminal device sends a first notification of receiving the downlink control channel transmission to the MAC entity of the terminal device. In step 302, the MAC entity of the terminal device receives the first notification, and the first cell and the first cell When the two cells are not the same, it is determined (or considered to consider) that the random access process corresponding to the random access preamble is successfully completed. Since the first cell and the second cell are different, it is determined that the downlink control channel transmission is the downlink control channel transmission of the first cell, not the downlink control channel transmission of the second cell, and the first cell initiates the random access The cell where the random access process corresponds to the preamble; or the cell where the random access preamble is sent. Therefore, the terminal device can infer that the downlink control channel of the first cell can communicate normally, and then can determine that it is the same as the random access in step 301. The random access procedure corresponding to the access preamble is successfully completed.
[0100]
In one embodiment, the downlink control channel transmission is to feed back the downlink control channel transmission of the random access preamble in step 301; the bottom layer of the terminal device sends the first downlink control channel transmission to the MAC entity of the terminal device. A notification, for example, the downlink control channel transmission is to feed back the downlink control channel transmission of the beam recovery failure request; in step 302, the MAC entity of the terminal device receives the first notification, and the first cell and the second cell When they are not the same, it is determined (or considered to consider) that the random access procedure corresponding to the random access preamble (for example, a beam failure recovery request) is successfully completed. Since it is determined that the downlink control channel transmission is to feed back the downlink control channel transmission of the random access preamble (sent in the first cell), it is determined that the downlink control channel transmission is a response to the random access preamble in step 301 ( Beam failure recovery request response), and then it can be determined that the random access process corresponding to the random access preamble in step 301 is successfully completed.
[0101]
In this embodiment, the above two implementation manners can be implemented separately or in combination. For example, the downlink control channel transmission is the downlink control channel transmission of the first cell in order to feed back the random access preamble in step 301. This embodiment Not as a restriction.
[0102]
In this embodiment, the downlink control channel transmission is addressed to the cell radio network temporary identification (C-RNTI) or the random access radio network temporary identification (RA-RNTI). For specific implementation, please refer to the embodiment 1. I will not repeat it here.
[0103]
In this embodiment, after step 302, since the random access process is successfully completed, the method further includes: (not shown) the terminal device stops sending or receiving uplink and downlink signals related to the random access process. For the specific implementation, refer to Embodiment 1, which will not be repeated here.
[0104]
In this embodiment, this condition can further clarify the random access process scenario, that is, the cell where the random access process corresponding to the random access preamble is initiated (or the cell where the random access preamble is sent) and monitoring Feed back the same or different scenarios where the downlink control channel transmission of the random access preamble is located in the same or different cell (or special cell), and determine whether the random access process is based on the relationship between the downlink control channel transmission and the random access preamble sent by the cell or terminal equipment Success, as a result, the terminal device can accurately send and receive data, thereby increasing the success rate, reducing the number of retransmissions, and saving energy. .
[0105]
Example 3
[0106]
Fig. 4 is a flowchart of the random access method of the third embodiment, which is applied to the terminal device side. As shown in Figure 4, the method includes:
[0107]
Step 401: The terminal device sends a random access preamble to the network device;
[0108]
Step 402: When the terminal device has received the downlink allocation on the downlink control channel, and the corresponding transmission block received is successfully decoded, the terminal device determines that the random access process corresponding to the random access preamble is successfully completed ；
[0109]
Wherein, the downlink control channel is a downlink control channel of the second cell and/or a downlink control channel for feeding back the random access preamble.
[0110]
In this embodiment, for the implementation of step 401, please refer to step 201 in embodiment 1, which will not be repeated here.
[0111]
In this embodiment, the difference from Embodiment 1 is that, in Embodiment 1, when the terminal device receives the first notification, it is determined that the random access procedure corresponding to the random access preamble is successfully completed. In this embodiment, since the data channel may carry information indicating subsequent uplink and downlink transmission, or the transmission of the data channel can be used to detect channel quality, only the data transmitted by the data channel can be successfully received (decoded) according to its instructions. For subsequent sending and receiving behaviors, it is necessary to judge whether the random access process corresponding to the random access preamble is successfully completed according to the reception of the PDCCH and the downlink data channel (PDSCH) scheduled on the PDCCH. .
[0112]
In this embodiment, after receiving the random access preamble of the terminal device, the network device will feed back the random access response to the terminal device. For example, the response is carried by the downlink allocation received in the physical downlink control channel (PDCCH). The device monitors the downlink assignment or monitors the downlink assignment associated with the random access preamble to determine whether it can successfully receive the control information sent by the network device, and then determine whether the random access process is successful. In a multi-carrier scenario Next, the network device will configure multiple carriers for the terminal device, and the serving cell (corresponding carrier) of the terminal device may change, that is, the current serving cell (second cell) may be the same as the serving cell (first cell) in step 401. Different or the same, the second cell is the cell where the downlink allocation of the random access preamble is monitored and fed back; or is a special cell (SpCell). Therefore, even if the downlink allocation is received on the PDCCH, the downlink allocation cannot be directly determined It is a random access response to the random access preamble sent in step 401, and thus it is impossible to determine whether the random access process is successful (completed).
[0113]
Therefore, in this embodiment, before step 402, the method may further include: (not shown) the terminal device monitors the downlink allocation on the downlink control channel, and when the downlink allocation is received on the PDCCH, the PDCCH scheduling The transport block is received on the PDSCH (the data on the PDSCH uses the transport block as the basic transmission unit), and the received transport block is decoded.
[0114]
In this embodiment, the downlink allocation refers to downlink control information (DCI) including downlink data scheduling. For example, at the bottom layer (such as the physical layer) of the terminal device, a DCI containing an indication of PDSCH is received. The terminal device receives the PDSCH on the corresponding resource according to the indication information in the DCI, and the received PDSCH will pass the preset The rules are cyclic redundancy check (CRC). When the verification is successful, the terminal device considers the transmission block to be decoded successfully.
[0115]
In one embodiment, the downlink control channel is the downlink control channel of the second cell; the second cell is the cell where the downlink allocation of the random access preamble is monitored and fed back; or is a special cell (SpCell), in step 402 When the MAC entity of the terminal device receives the downlink allocation on the downlink control channel, and the corresponding transmission block received is successfully decoded, it determines (or considers) the random access corresponding to the random access preamble The process completed successfully. Since the downlink allocation and corresponding transmission block of the second cell are successfully received, it can be inferred that the network device and the terminal device can already communicate normally, and there is no need to continue the random access process, and it can be determined that it is the same as in step 401 The random access procedure corresponding to the random access preamble is successfully completed.
[0116]
In this embodiment, optionally, the transmission block may be a transmission block received by the first cell, but this embodiment is not limited thereto.
[0117]
In one embodiment, the downlink control channel is to feed back the downlink control channel of the random access preamble in step 401; for example, the downlink control channel is to feed back the downlink control channel of the beam recovery failure request; in step 402, When the MAC entity of the terminal device receives the downlink allocation on the downlink control channel, and the corresponding transmission block received is successfully decoded, it determines (or considers) that it is consistent with the random access preamble (for example, a beam failure recovery request) The corresponding random access procedure is successfully completed. Since the successful reception is in order to feed back the downlink allocation of the random access preamble and the corresponding transmission block, it can be inferred that the network device and the terminal device can already communicate normally, and the random access process does not need to be continued, and it can be determined and The random access process corresponding to the random access preamble in step 401 is successfully completed.
[0118]
In this embodiment, optionally, the transmission block may be a transmission block received by the first cell, but this embodiment is not limited thereto.
[0119]
In this embodiment, the above two implementations can be implemented separately or in combination. For example, the downlink control channel is the downlink control channel of the second cell for feeding back the random access preamble in step 401. This embodiment does not Use this as a limit.
[0120]
In this embodiment, the downlink control channel is related to the cell radio network temporary identification (C-RNTI) or the random access radio network temporary identification (RA-RNTI) (PDCCH for the C-RNTI or RA-RNTI). For the implementation manner, reference may be made to Example 1, which will not be repeated here.
[0121]
In this embodiment, after step 402, since the random access process is successfully completed, the method further includes: (not shown) the terminal device stops sending or receiving uplink and downlink signals related to the random access process. For the specific implementation, refer to Embodiment 1, which will not be repeated here.
[0122]
Through the above-mentioned embodiments, the success of the random access process is determined according to the relationship between the downlink control channel and the random access preamble sent by the cell or the terminal device. As a result, the terminal device can accurately send and receive data, thereby increasing the success rate and reducing the number of retransmissions. , Thereby saving energy consumption. .
[0123]
Example 4
[0124]
Fig. 5 is a flowchart of the random access method of the fourth embodiment, which is applied to the terminal device side. As shown in Figure 5, the method includes:
[0125]
Step 501: The terminal device sends a random access preamble to the network device;
[0126]
Step 502: When the terminal device has received the downlink allocation on the downlink control channel, and the corresponding transmission block received has been successfully decoded, and the condition of the first cell related to the random access preamble is satisfied, the terminal device Determining that the random access procedure corresponding to the random access preamble is successfully completed;
[0127]
Wherein, the downlink control channel is a downlink control channel of the second cell and/or a downlink control channel for feeding back the random access preamble.
[0128]
In this embodiment, for the implementation of step 501, please refer to step 501 in embodiment 1, which will not be repeated here.
[0129]
Therefore, in this embodiment, before step 502, the method may further include: (not shown) the terminal device monitors the downlink allocation on the downlink control channel, and when the downlink allocation is received on the PDCCH, the PDCCH scheduling The transport block is received on the PDSCH (the data on the PDSCH uses the transport block as the basic transmission unit), and the received transport block is decoded. For the specific implementation of the downlink control channel, please refer to Embodiment 3, which will not be repeated here.
[0130]
In this embodiment, the difference from embodiment 3 is that in embodiment 3, the terminal device receives the downlink allocation and the received corresponding transport block is successfully decoded, that is, it is determined to be related to the random access The random access process corresponding to the preamble is successfully completed. In this embodiment, in addition to receiving the downlink allocation and the corresponding transmission block received successfully decoded, the terminal device also needs to determine whether it meets the requirements of the random access preamble. The relevant condition of the first cell, when the downlink allocation is received and the corresponding transmission block received is successfully decoded, and the condition is met, the terminal device determines the random access process corresponding to the random access preamble Completed successfully.
[0131]
In this embodiment, the condition of the first cell related to the random access preamble is that the first cell is the same as the second cell, or the first cell is different from the second cell. For the specific meaning of the first cell, please refer to the embodiment 1. The second cell is a cell that monitors and feeds back the downlink allocation of the random access preamble; or a special cell (SpCell), and the condition is similar to the second embodiment.
[0132]
In an embodiment, the downlink control channel is the downlink control channel of the second cell. In step 502, when the MAC entity of the terminal device receives the downlink allocation on the downlink control channel, and the corresponding transport block received is successfully decoded, and the first cell and the second cell are the same, it is determined (or considered to consider ) The random access procedure corresponding to the random access preamble is successfully completed. In a scenario where the first cell and the second cell are the same, since the downlink allocation and corresponding transmission block of the first cell and/or the second cell are successfully received, it can be inferred that the network device and the terminal device can communicate normally, There is no need to continue the random access process, and it can be determined that the random access process corresponding to the random access preamble in step 501 is successfully completed.
[0133]
In this implementation manner, optionally, the transmission block may be a transmission block received by the first cell and/or the second cell, but this embodiment is not limited thereto.
[0134]
In one embodiment, the downlink control channel is to feed back the downlink control channel of the random access preamble in step 501; for example, the downlink control channel is to feed back the downlink control channel of the beam recovery failure request; in step 502, When the MAC entity of the terminal device receives the downlink allocation on the downlink control channel, and the corresponding transmission block received is successfully decoded, and the first cell and the second cell are the same, it is determined (or considered) to be connected to the random The random access procedure corresponding to the incoming preamble (for example, a beam failure recovery request) is successfully completed. In the same scenario of the first cell and the second cell, since the downlink allocation and the corresponding transmission block of the random access preamble are successfully received and fed back, it can be inferred that the network device and the terminal device can already communicate normally. The random access process is continued, and it can be determined that the random access process corresponding to the random access preamble in step 501 is successfully completed.
[0135]
In this implementation manner, optionally, the transmission block may be a transmission block received by the first cell and/or the second cell, but this embodiment is not limited thereto.
[0136]
In this embodiment, the above two implementation manners can be implemented separately or in combination. For example, the downlink control channel is the downlink control channel of the second cell in order to feed back the random access preamble in step 501. This embodiment does not Use this as a limit.
[0137]
In one embodiment, the downlink control channel is the downlink control channel of the second cell. In step 502, the MAC entity of the terminal device receives the downlink allocation on the downlink control channel, and the received corresponding transport block is When the decoding is successful, and the first cell and the second cell are not the same, it is determined (or considered to consider) that the random access process corresponding to the random access preamble is successfully completed. In a scenario where the first cell and the second cell are not the same, because the downlink allocation and corresponding transmission block of the second cell are successfully received, it can be inferred that the network device and the terminal device can communicate normally, and there is no need to continue. This random access process can then determine that the random access process corresponding to the random access preamble in step 501 is successfully completed.
[0138]
In this embodiment, optionally, the transmission block may be a transmission block received by the first cell, but this embodiment is not limited thereto.
[0139]
In one embodiment, the downlink control channel is to feed back the downlink control channel of the random access preamble in step 501; for example, the downlink control channel is to feed back the downlink control channel of the beam recovery failure request; in step 502, When the MAC entity of the terminal device receives the downlink allocation on the downlink control channel, and the corresponding transmission block received is successfully decoded, and the first cell and the second cell are not the same, it is determined (or considered) to be consistent with the random The random access procedure corresponding to the access preamble (for example, beam failure recovery request) is successfully completed. In the scenario where the first cell and the second cell are not the same, because the downlink allocation and corresponding transmission block for feeding back the random access preamble (sent in the first cell) are successfully received, it can be inferred that the network equipment and the terminal equipment Normal communication is already possible, and there is no need to continue the random access process, and it can be determined that the random access process corresponding to the random access preamble in step 501 is successfully completed.
[0140]
In this embodiment, optionally, the transmission block may be a transmission block received by the first cell, but this embodiment is not limited thereto.
[0141]
In this embodiment, the above two implementation manners can be implemented separately or in combination. For example, the downlink control channel is the downlink control channel of the second cell in order to feed back the random access preamble in step 501. This embodiment does not Use this as a limit.
[0142]
In this embodiment, the downlink control channel is related to the Cell Radio Network Temporary Identity (C-RNTI) or the Random Access Radio Network Temporary Identity (RA-RNTI). The specific implementation can refer to Embodiment 3, which will not be repeated here. Go into details.
[0143]
In this embodiment, after step 502, since the random access process is successfully completed, the method further includes: (not shown) the terminal device stops sending or receiving uplink and downlink signals related to the random access process. For the specific implementation, refer to Embodiment 1, which will not be repeated here.
[0144]
In this embodiment, this condition can further clarify the random access process scenario, that is, the cell where the random access process corresponding to the random access preamble is initiated (or the cell where the random access preamble is sent) and monitoring Feed back the same or different scenarios of the cell (or special cell) where the downlink allocation of the random access preamble is located, and determine whether the random access process is successful according to the relationship between the downlink control channel and the random access preamble sent by the cell or terminal equipment. Therefore, the terminal device can accurately send and receive data, thereby increasing the success rate, reducing the number of retransmissions, and saving energy consumption.
[0145]
It should be noted that the foregoing Embodiments 1-4 can be implemented separately or in combination of any two or more. That is, when determining whether the random access process is successfully completed, any of the steps 202, 302, 402, and 502 in the embodiment 1-4 can be combined. Two or more steps are judged, and when the requirements of at least one of the steps are met, it is determined that the random access process is successfully completed, and no examples are given here.
[0146]
Steps 202, 302, 402, and 502 in the above embodiments 1-4 illustrate the MAC entity behavior of the terminal device in the above different scenarios, that is, how to determine whether the random access process is successfully completed. The following describes the above scenario diagram in conjunction with Embodiment 5 and FIG. 6 Under 1C, the physical layer behavior of the terminal device.
[0147]
Example 5
[0148]
Fig. 6 is a flowchart of the random access method of the fifth embodiment, which is applied to the terminal device side. As shown in Figure 6, the method includes:
[0149]
Step 601: The terminal device sends a random access preamble to the network device;
[0150]
Step 602: The terminal device monitors downlink control information in the second cell; where the downlink control information is related to the random access preamble;
[0151]
Step 603: The terminal device receives the downlink data scheduled by the downlink control information in a first cell, where the first cell and the second cell are different.
[0152]
In this embodiment, for the implementation of step 601, reference may be made to step 201 in Embodiment 1, which will not be repeated here. For example, the terminal device may send the random access preamble in the first cell. That is, the first cell is the cell where the random access preamble is sent, but this embodiment is not limited to this. The first cell may also be a cell that provides a reference signal index associated with the downlink control information, and/ Or send the cell where the beam failure recovery configuration corresponding to the random access preamble is located.
[0153]
For example, the first cell is the cell where the random access preamble is sent, and when the random access preamble is a beam failure recovery request, before step 601, the method may further include: (not shown) the terminal device receives A first configuration sent by a network device through high-layer signaling, the first configuration (for example, PRACH-ResourceDedicatedBFR) indicates a specific PRACH resource used for beam failure recovery, and the first configuration may include at least one of the following configuration information: Root sequence information configured for recovery, random access opportunity configuration information based on non-competitive beam failure recovery, search space information for receiving beam failure recovery, candidate beam reference signal list information, used to distinguish random access processes (for example, The random access process may be a priority parameter for (for random access process for beam failure recovery), and the terminal device sends the random access preamble in the first cell according to the first configuration.
[0154]
For example, the first cell may be a cell that provides a reference signal index associated with the downlink data scheduled by the downlink control information, where the reference signal index is associated with the downlink data, indicating that the downlink data is based on the reference signal index The corresponding reference signal is received by the quasi co-located (QCL) parameter, the method may further include (not shown): the terminal device receives the reference sent by the network device through higher layer signaling in the first cell The signal index, the reference signal index is an index selected by the network device in the candidate beam reference signal list (candidateBeamRSlist). The reference signal may include at least one of the following: a channel state information reference signal (CSI-RS, Channel State Information Reference Signal), a synchronization signal (SS, Synchronization Signal), and a physical broadcast channel (PBCH, Physical Broadcast Channel).
[0155]
For example, the first cell may be the cell where the beam failure recovery configuration corresponding to the random access preamble is sent, that is, when the random access preamble is a beam failure recovery request, before step 601, the method may further include: (Not shown) The terminal device receives the first configuration (beam failure recovery configuration) sent by the network device through high-level signaling in the first cell. The first configuration is specifically as described above and will not be repeated here.
[0156]
In this embodiment, the cell where the random access preamble is sent can be equal to the cell providing the reference signal index, or it can be equal to the cell where the beam failure recovery configuration corresponding to the random access preamble is sent. This is a limitation.
[0157]
In this embodiment, in step 602, the downlink control information is related to the random access preamble in step 601, indicating a random access response (for example, BFR RAR), for example, the downlink control information (DCI) passes through the downlink control channel The bearer is used to schedule downlink data. The specific implementation of the DCI can refer to the prior art. The downlink control channel is used to feed back the downlink control channel of the random access preamble, that is, the PDCCH corresponding to PRACH transmission. For the implementation manner of, refer to Embodiment 3 or 4, which will not be repeated here.
[0158]
In this embodiment, before step 602, the method may further include: (not shown) the terminal device receives a second configuration sent by the network device through high-layer signaling, the second configuration indicating random access for beam failure recovery request Responding to the search space (BFR RAR, beam failure recovery request response), monitoring the downlink control information includes: according to the second configuration, the terminal device receives the downlink control channel (scrambled by the C-RNTI) in the search space, and decodes Obtain the downlink control information after scrambling.
[0159]
In this implementation, the second cell is the cell where the downlink control information is monitored, or the second cell is a Spcell.
[0160]
In this embodiment, when the first cell and the second cell are different, in step 603, the terminal device assumes that the downlink data scheduled by the downlink control information is received in the first cell, where receiving includes detection, monitoring, At least one of decoding and decoding.
[0161]
In this embodiment, the above-mentioned high-level signaling may be a media access control (MAC, Media Access Control) layer or radio resource control (RRC) signaling.
[0162]
Therefore, when the terminal device receives the downlink data in the first cell, it can be inferred that the channel quality of the first cell has become better, and then it can be determined that the beam failure of the first cell has been recovered, so that the corresponding randomness can be terminated in time. Process, save energy consumption.
[0163]
Example 6
[0164]
Fig. 7 is a flowchart of the data sending method of the sixth embodiment, which is applied to the network device side. As shown in Figure 7, the method includes:
[0165]
Step 701: The network device receives the random access preamble sent by the terminal device.
[0166]
Step 702: The network device sends downlink control information to the terminal device in the second cell; where the downlink control information is related to the random access preamble;
[0167]
Step 703: The network device sends the downlink data scheduled by the downlink control information to the terminal device in the first cell, where the first cell and the second cell are different.
[0168]
In this embodiment, steps 701-703 correspond to steps 601-603 in Embodiment 5, and the repetition will not be repeated.
[0169]
For example, the first cell is the cell where the random access preamble is sent, and when the random access preamble is a beam failure recovery request, before step 701, the method may further include: (not shown) the network device passes a higher layer For the first configuration sent by the signaling to the terminal device, the specific implementation of the first configuration can refer to Embodiment 5, which will not be repeated here.
[0170]
For example, the first cell may be a cell that provides a reference signal index associated with the downlink data scheduled by the downlink control information, the reference signal may be a candidate beam reference signal, and the method may further include (not shown): network The device selects a reference signal index from the candidate beam reference signal list (candidateBeamRSlist), and sends the reference signal index to the terminal device through high-level signaling in the first cell.
[0171]
For example, the first cell may be the cell where the beam failure recovery configuration corresponding to the random access preamble is sent, that is, when the random access preamble is a beam failure recovery request, before step 701, the method may further include: (Not shown) The network device sends the first configuration (beam failure recovery configuration) to the terminal device through high-level signaling in the first cell. The first configuration is specifically as described above and will not be repeated here.
[0172]
In this embodiment, the above-mentioned high-level signaling may be a media access control (MAC, Media Access Control) layer or radio resource control (RRC) signaling.
[0173]
In this embodiment, in step 702, the network device scrambles the PDCCH through the C-RNTI. The PDCCH is used to feed back the PDCCH of the random access preamble, and the DCI is carried through the PDCCH, and the PDCCH is sent to the terminal device in the second cell. DCI.
[0174]
In this implementation, the second cell is the cell where the downlink control information is sent, or the second cell is the Spcell.
[0175]
In this embodiment, in step 703, when the first cell and the second cell are different, the network device sends the downlink data scheduled by the downlink control information to the terminal device in the first cell, so that the terminal device is in the first cell. The downlink data scheduled by the downlink control information is received on the cell, but the downlink data scheduled by the downlink control information is not received on the second cell.
[0176]
In this embodiment, in step 703, the network device sends the downlink data according to the reference signal corresponding to the random access preamble received in step 701; wherein, the method may further include (not shown), the network The device configures the correspondence between the RACH occasion of the random access preamble and the reference signal through high-layer signaling. The high-layer signaling may be RRC signaling. According to the correspondence and the random access preamble, it can be determined Reference signal corresponding to the random access preamble. The antenna port used by the network device for sending the downlink data and the antenna port used for sending the reference signal are quasi-co-located. The reference signal may include at least one of the following: Channel State Information Reference Signal (CSI-RS), Synchronization Signal (SS), Physical Broadcast Channel (PBCH), etc.
[0177]
As a result, the network device can use correct instruction information to send downlink data, thereby increasing the success rate of data transmission, reducing the number of retransmissions, and saving energy consumption.
[0178]
Example 7
[0179]
The seventh embodiment also provides a random access device. Since the principle of the device to solve the problem is similar to the method of embodiment 1 or 2, its specific implementation can refer to the method of embodiment 1 or 2, and the same contents will not be repeated.
[0180]
FIG. 8 is a schematic diagram of the structure of the random access device. As shown in FIG. 8, the device 800 includes:
[0181]
The first sending unit 801 is configured to send a random access preamble to a network device;
[0182]
The first determining unit 802 is configured to determine when the terminal device receives the first notification, or when the terminal device receives the first notification and satisfies the condition of the first cell related to the random access preamble The random access process corresponding to the random access preamble is successfully completed;
[0183]
Wherein, the first notification is a notification sent from the bottom layer of the terminal device to receive the downlink control channel transmission in the first cell, and/or sent from the bottom layer to receive the downlink control channel for feeding back the random access preamble Notification of transmission.
[0184]
In this embodiment, for the implementation manners of the first sending unit 801 and the first determining unit 802, please refer to steps 201-202 in Embodiment 1 and steps 301-302 in Embodiment 2, which will not be repeated here.
[0185]
In this embodiment, the condition is: the first cell and the second cell are the same, or the first cell and the second cell are different. For the implementation of the first cell and the second cell, refer to Embodiment 1 or 2, which will not be repeated here.
[0186]
In this embodiment, the random access preamble is a beam failure recovery request, and the downlink control channel transmission is addressed to C-RNTI or RA-RNTI.
[0187]
In this embodiment, optionally, the device further includes: (not shown)
[0188]
The first transceiving unit is configured to receive the downlink control channel transmission, and send a first notification of receiving the downlink control channel transmission to the MAC entity of the terminal device, and the MAC entity of the terminal device receives the first notification sent from the bottom layer, For the specific implementation of the downlink control channel transmission, please refer to Embodiment 1, which will not be repeated here.
[0189]
In this embodiment, optionally, the device further includes: (not shown)
[0190]
The first processing unit is configured to stop sending or receiving uplink and downlink signals related to the random access process after the random access process is successfully completed, and/or to ignore the measurement interval that may occur.
[0191]
Through the above-mentioned embodiments, the success of the random access process is determined according to the relationship between the downlink control channel transmission and the random access preamble sent by the cell or the terminal device. Thus, the terminal device can accurately send and receive data, thereby increasing the success rate and reducing retransmissions. Times to save energy.
[0192]
Example 8
[0193]
Embodiment 8 also provides a random access device. Since the principle of the device to solve the problem is similar to the method of embodiment 3 or 4, the specific implementation can refer to the method of embodiment 3 or 4, and the same content will not be repeated.
[0194]
FIG. 9 is a schematic diagram of the structure of the random access device. As shown in FIG. 9, the device 900 includes:
[0195]
The second sending unit 901 is configured to send a random access preamble to a network device;
[0196]
The second determining unit 902 is used for when the terminal device has received the downlink allocation on the downlink control channel, and the received corresponding transport block is successfully decoded, or when the terminal device has received the downlink allocation on the downlink control channel, And when the corresponding transmission block received is successfully decoded and the condition of the first cell related to the random access preamble is met, it is determined that the random access process corresponding to the random access preamble is successfully completed;
[0197]
Wherein, the downlink control channel is a downlink control channel of the second cell and/or a downlink control channel for feeding back the random access preamble.
[0198]
In this embodiment, for the implementation manners of the second sending unit 901 and the second determining unit 902, please refer to steps 401-402 in Embodiment 3, and steps 501-502 in Embodiment 4, which will not be repeated here.
[0199]
In this embodiment, the condition is: the first cell and the second cell are the same, or the first cell and the second cell are different. For the implementation of the first cell and the second cell, refer to Embodiment 1 or 2, which will not be repeated here.
[0200]
In this embodiment, the transport block is a transport block received in the first cell, the random access preamble is a beam failure recovery request, and the downlink control channel is related to C-RNTI or RA-RNTI.
[0201]
In this embodiment, optionally, the device further includes: (not shown)
[0202]
The second transceiver unit is used to monitor the downlink allocation on the downlink control channel, and when the downlink allocation is received on the PDCCH, the transmission block is received on the PDSCH scheduled by the PDCCH (the data on the PDSCH uses the transmission block as the basic transmission unit) , The received transport block is decoded. For the specific implementation of the downlink control channel, please refer to Embodiment 3, which will not be repeated here.
[0203]
In this embodiment, optionally, the device further includes: (not shown)
[0204]
The second processing unit is used to stop sending or receiving uplink and downlink signals related to the random access process after the random access process is successfully completed, and/or is used to ignore possible measurement intervals.
[0205]
Through the above-mentioned embodiments, the success of the random access process is determined according to the relationship between the downlink control channel and the random access preamble sent by the cell or the terminal device. As a result, the terminal device can accurately send and receive data, thereby increasing the success rate and reducing the number of retransmissions. , Thereby saving energy consumption.
[0206]
Example 9
[0207]
This embodiment 9 also provides a data receiving device. Since the principle of the device to solve the problem is similar to the method of embodiment 5, its specific implementation can refer to the implementation of the method of embodiment 5, and the same content will not be repeated.
[0208]
FIG. 10 is a schematic diagram of the structure of the data receiving device. As shown in FIG. 10, the device 1000 includes:
[0209]
The third sending unit 1001, which is used to send a random access preamble to a network device;
[0210]
A monitoring unit 1002, configured to monitor downlink control information in the second cell; wherein the downlink control information is related to the random access preamble;
[0211]
The receiving unit 1003 is configured to receive the downlink data scheduled by the downlink control information in a first cell, where the first cell and the second cell are different.
[0212]
In this embodiment, the implementation manners of the first cell and the second cell may refer to Embodiment 5, which will not be repeated here.
[0213]
In this embodiment, the implementation of the third sending unit 1001, the listening unit 1002, and the receiving unit 1003 can refer to steps 601-603 in Embodiment 5.
[0214]
In this embodiment, the random access preamble is sent according to the high-level signaling configuration for beam failure recovery, and the random access preamble is a beam failure recovery request.
[0215]
In this embodiment, optionally, the device may further include: (not shown)
[0216]
The third transceiving unit is configured to receive a first configuration sent by a network device through high-layer signaling, the first configuration (for example, PRACH-ResourceDedicatedBFR) indicates a specific PRACH resource used for beam failure recovery, the first configuration can be specifically referred to According to existing standards, the third sending unit 1001 sends the random access preamble in the first cell according to the first configuration; or,
[0217]
The third transceiving unit is configured to receive, in the first cell, a reference signal index sent by a network device through high-level signaling, where the reference signal index is an index selected by the network device in a candidate beam reference signal list (candidateBeamRSlist); or,
[0218]
The third transceiver unit is configured to receive the first configuration (beam failure recovery configuration) sent by the network device through high-layer signaling in the first cell. The first configuration is specifically as described above and will not be repeated here.
[0219]
Therefore, when the terminal device receives the downlink data in the first cell, it can be inferred that the channel quality of the first cell has become better, and then it can be determined that the beam failure of the first cell has been recovered, so that the corresponding randomness can be terminated in time. Process, save energy consumption.
[0220]
Example 10
[0221]
This embodiment 10 also provides a data sending device. Since the principle of the device to solve the problem is similar to the method of Embodiment 6, the specific implementation can refer to the implementation of the method of Embodiment 6, and the same content will not be repeated.
[0222]
FIG. 11 is a schematic diagram of the structure of the data sending device. As shown in FIG. 11, the device 1100 includes:
[0223]
The first receiving unit 1101 is configured to receive a random access preamble sent by a terminal device;
[0224]
A fourth sending unit 1102, configured to send downlink control information to the terminal device in the second cell; wherein, the downlink control information is related to the random access preamble;
[0225]
The fifth sending unit 1103 is configured to send the downlink data scheduled by the downlink control information to the terminal device in the first cell, where the first cell and the second cell are different.
[0226]
In this embodiment, the implementation manners of the first cell and the second cell may refer to Embodiment 5, which will not be repeated here.
[0227]
In this embodiment, the implementation of the first receiving unit 1101, the fourth sending unit 1102, and the fifth sending unit 1103 may refer to steps 701-703 in Embodiment 6.
[0228]
In this embodiment, the random access preamble is sent according to the high-level signaling configuration for beam failure recovery, and the random access preamble is a beam failure recovery request.
[0229]
In this embodiment, optionally, the device may further include: (not shown)
[0230]
The fourth transceiving unit is used to send a first configuration to the terminal device through high-level signaling, the first configuration (for example, PRACH-ResourceDedicatedBFR) indicates a specific PRACH resource used for beam failure recovery, the first configuration can be specifically referred to Have standards; or,
[0231]
The fourth transceiving unit is configured to select the reference signal index from the candidate beam reference signal list (candidateBeamRSlist), and send the reference signal index to the terminal device through high-level signaling in the first cell; or,
[0232]
The fourth transceiving unit is configured to send the first configuration (beam failure recovery configuration) to the terminal device in the first cell through high-layer signaling. The first configuration is specifically as described above and will not be repeated here.
[0233]
As a result, the network device can use correct instruction information to send downlink data, thereby increasing the success rate of data transmission, reducing the number of retransmissions, and saving energy consumption.
[0234]
Example 11
[0235]
This embodiment also provides a communication system, which can refer to FIG. 1A, and the same content as in Embodiments 1 to 2 will not be repeated.
[0236]
In this embodiment, the communication system 100 may include: a terminal device 102, which is configured with the random access apparatus 800 or 900 described in Embodiment 7 or 8, or is configured with the data receiving apparatus 1000 described in Embodiment 9. .
[0237]
Optionally, the communication system may further include: a network device 101, which is configured with the data sending apparatus 1100 as described in Embodiment 10.
[0238]
This embodiment also provides a network device, which may be a base station, for example, but the present invention is not limited to this, and may also be other network devices.
[0239]
FIG. 12 is a schematic diagram of the structure of a network device according to an embodiment of the present invention. As shown in FIG. 12, the network device 1200 may include: a processor 1210 (for example, a central processing unit CPU) and a memory 1220; the memory 1220 is coupled to the processor 1210. The memory 1220 can store various data; in addition, it also stores an information processing program 1230, which is executed under the control of the processor 1210.
[0240]
For example, the processor 1210 may be configured to execute the program 1230 to implement the data sending method described in Embodiment 6. For example, the processor 1210 may be configured to perform the following control: receiving a random access preamble sent by a terminal device; sending downlink control information to the terminal device in the second cell; wherein the downlink control information is related to the random access preamble ; Send the downlink data scheduled by the downlink control information to the terminal equipment in the first cell, where the first cell and the second cell are different.
[0241]
In addition, as shown in FIG. 12, the network device 1200 may further include: a transceiver 1240, an antenna 1250, etc.; wherein the functions of the above-mentioned components are similar to those of the prior art, and will not be repeated here. It is worth noting that the network device 1200 does not necessarily include all the components shown in FIG. 12; in addition, the network device 1200 may also include components not shown in FIG. 12, which can refer to the prior art.
[0242]
The embodiment of the present invention also provides a terminal device, but the present invention is not limited to this, and may also be other devices.
[0243]
Fig. 13 is a schematic diagram of a terminal device according to an embodiment of the present invention. As shown in FIG. 13, the terminal device 1300 may include a processor 1310 and a memory 1320; the memory 1320 stores data and programs, and is coupled to the processor 1310. It is worth noting that this figure is exemplary; other types of structures can also be used to supplement or replace this structure to implement telecommunication functions or other functions.
[0244]
For example, the processor 1310 may be configured to execute a program to implement the random access method as described in Embodiment 1 or 2. For example, the processor 1310 may be configured to perform the following control: send a random access preamble to the network device; when the terminal device receives the first notification, or when the first notification is received, and meets the requirements related to the random access preamble When the condition of the first cell of the first cell, consider that the random access procedure corresponding to the random access preamble is successfully completed; wherein, the first notification is sent from the bottom layer and received the downlink control channel in the first cell The notification of transmission, and/or the notification sent from the bottom layer to receive the downlink control channel transmission for feeding back the random access preamble.
[0245]
For example, the processor 1310 may be configured to execute a program to implement the random access method as described in Embodiment 3 or 4. For example, the processor 1310 may be configured to perform the following control: send a random access preamble to a network device; when the downlink allocation has been received on the downlink control channel and the corresponding transmission block received has been successfully decoded, or when When the downlink control channel receives the downlink allocation, and the corresponding transmission block received is successfully decoded, and the condition of the first cell related to the random access preamble is satisfied, the terminal device determines the phase with the random access preamble. The corresponding random access process is successfully completed; wherein, the downlink control channel is the downlink control channel of the second cell and/or the downlink control channel for feeding back the random access preamble.
[0246]
For example, the processor 1310 may be configured to execute a program to implement the data receiving method as described in Embodiment 5. For example, the processor 1310 may be configured to perform the following control: send a random access preamble to a network device; monitor downlink control information in the second cell; wherein the downlink control information is related to the random access preamble; receive in the first cell For the downlink data scheduled by the downlink control information, the first cell and the second cell are different.
[0247]
As shown in FIG. 13, the terminal device 1300 may further include: a communication module 1330, an input unit 1340, a display 1350, and a power supply 1360. Among them, the functions of the above-mentioned components are similar to those of the prior art, and will not be repeated here. It is worth noting that the terminal device 1300 does not necessarily include all the components shown in FIG. 13, and the above-mentioned components are not necessary; in addition, the terminal device 1300 may also include components not shown in FIG. There is technology.
[0248]
FIG. 14 is a flow chart of the data receiving and sending method of this embodiment. As shown in FIG. 14, the method includes:
[0249]
Step 1401: The terminal device sends a random access preamble to the network device;
[0250]
Step 1402: The network device sends downlink control information in the second cell, and the downlink control information is carried by the PDCCH, and the PDCCH is for feeding back the PDCCH of the random access preamble;
[0251]
Step 1403: The network device sends the downlink data scheduled by the downlink control information in the first cell;
[0252]
Step 1404: The terminal device monitors the downlink control information in the second cell; monitors the downlink data in the first cell, and decodes the downlink data.
[0253]
For the implementation of the foregoing steps 1401-1404, reference may be made to Embodiment 5-6. Steps 1401 and 1404 are implemented by the bottom layer (for example, the physical layer) of the terminal device, and will not be repeated here. In addition, this embodiment does not limit the execution order of steps 1402-1404, and they can be performed simultaneously.
[0254]
Step 1405: When the bottom layer of the terminal device receives the downlink control channel transmission, it sends a first notification to the MAC layer. For the first notification, please refer to Embodiment 1 for details, which will not be repeated here.
[0255]
In this embodiment, the execution order of steps 1405 and 1404 is not limited. Step 1405 can be executed simultaneously with step 1404. For example, step 1405 can be executed after the data decoding in step 1404 is successful, or it can be executed after DCI is received. Execute before the code, this embodiment does not take this as a limitation
[0256]
In step 1406, it is judged whether the conditions are met. When the conditions are met, the MAC entity determines that the random access process corresponding to the random access preamble in step 1401 is successfully completed.
[0257]
For the implementation of the foregoing step 1406, reference may be made to steps 202, 302, 402, and 502 in Embodiment 1-4, which are implemented by the MAC layer of the terminal device, and will not be repeated here.
[0258]
In this embodiment, before step 1401, the method may further include: (not shown, optional), the network device sends the reference signal index and/or the first configuration to the terminal device. For details, please refer to Embodiment 5. I won't repeat them here.
[0259]
An embodiment of the present invention also provides a storage medium storing a computer-readable program, wherein the computer-readable program enables the random access apparatus or terminal device to execute the random access method described in any one of Embodiments 1 to 4.
[0260]
An embodiment of the present invention also provides a computer-readable program, wherein when the program is executed in a random access device or terminal device, the program causes the random access device or terminal device to execute any of the embodiments 1 to 4 One of the described random access methods.
[0261]
An embodiment of the present invention also provides a storage medium storing a computer-readable program, wherein the computer-readable program enables the data receiving apparatus or terminal device to execute the data receiving method described in Embodiment 5.
[0262]
An embodiment of the present invention also provides a computer-readable program, wherein when the program is executed in a data receiving apparatus or terminal device, the program causes the data receiving apparatus or terminal device to perform the data receiving described in Embodiment 5. method.
[0263]
An embodiment of the present invention also provides a storage medium storing a computer-readable program, wherein the computer-readable program enables the data sending apparatus or network device to execute the data sending method described in Embodiment 6.
[0264]
An embodiment of the present invention also provides a computer-readable program, wherein when the program is executed in a data sending apparatus or network device, the program causes the data sending apparatus or network device to execute the data sending described in Embodiment 6. method.
[0265]
The above devices and methods of the present invention can be implemented by hardware, or can be implemented by hardware combined with software. The present invention relates to such a computer-readable program, when the program is executed by a logic component, the logic component can realize the above-mentioned device or constituent component, or the logic component can realize the above-mentioned various methods Or steps. The present invention also relates to storage media for storing the above programs, such as hard disks, magnetic disks, optical disks, DVDs, flash memory, and the like.
[0266]
The processing methods in each device described in conjunction with the embodiments of the present invention may be directly embodied in hardware, a software module executed by a processor, or a combination of the two. For example, one or more of the functional block diagrams and/or one or more combinations of the functional block diagrams shown in FIGS. 8-13 may correspond to each software module of the computer program flow or each hardware module. These software modules can respectively correspond to the steps shown in Figure 2-7. These hardware modules can be implemented by solidifying these software modules using a field programmable gate array (FPGA), for example.
[0267]
The software module can be located in RAM memory, flash memory, ROM memory, EPROM memory, EEPROM memory, registers, hard disk, removable disk, CD-ROM or any other form of storage medium known in the art. A storage medium may be coupled to the processor, so that the processor can read information from the storage medium and write information to the storage medium; or the storage medium may be a component of the processor. The processor and the storage medium may be located in the ASIC. The software module can be stored in the memory of the mobile terminal, or can be stored in a memory card that can be inserted into the mobile terminal. For example, if the device (such as a mobile terminal) uses a larger-capacity MEGA-SIM card or a large-capacity flash memory device, the software module can be stored in the MEGA-SIM card or a large-capacity flash memory device.
[0268]
One or more of the functional block diagrams described in FIGS. 8-13 and/or one or more combinations of the functional block diagrams can be implemented as a general-purpose processor or a digital signal processor (DSP) for performing the functions described in this application , Application Specific Integrated Circuit (ASIC), Field Programmable Gate Array (FPGA) or other programmable logic device, discrete gate or transistor logic device, discrete hardware component, or any suitable combination thereof. One or more of the functional block diagrams and/or one or more combinations of the functional block diagrams described in FIGS. 8-13 can also be implemented as a combination of computing devices, for example, a combination of a DSP and a microprocessor, and multiple micro-processing Processor, one or more microprocessors in communication with the DSP, or any other such configuration.
[0269]
The present invention has been described above with reference to specific embodiments, but it should be clear to those skilled in the art that these descriptions are all exemplary and do not limit the scope of protection of the present invention. Those skilled in the art can make various variations and modifications to the present invention based on the principles of the present invention, and these variations and modifications are also within the scope of the present invention.
[0270]
Appendix 1. A random access method, wherein the method includes:
[0271]
The terminal device sends a random access preamble to the network device;
[0272]
When the terminal device receives the first notification, or when the terminal device receives the first notification and satisfies the condition of the first cell related to the random access preamble, the terminal device determines (consider) The random access process corresponding to the random access preamble is successfully completed;
[0273]
Wherein, the first notification is a notification sent from the bottom layer to receive a downlink control channel transmission in the first cell, and/or a notification sent from the bottom layer to receive a downlink control channel transmission for feeding back the random access preamble announcement of.
[0274]
2. The method according to appendix 1, wherein the first cell is:
[0275]
The cell where the random access process corresponding to the random access preamble is initiated; or,
[0276]
Send the cell where the random access preamble is located.
[0277]
3. The method according to appendix 1 or 2, wherein the condition is: the first cell and the second cell are the same, or the first cell and the second cell are different.
[0278]
4. The method according to appendix 3, wherein the second cell is:
[0279]
Monitor and feed back the cell where the downlink control channel of the random access preamble is transmitted; or,
[0280]
Special cell (SpCell).
[0281]
5. The method according to any one of appendix 1 to 4, wherein the random access preamble is a beam failure recovery request.
[0282]
6. The method according to any one of appendix 1 to 5, the downlink control channel transmission is addressed to C-RNTI or RA-RNTI.
[0283]
7. The method according to any one of appendix 1 to 6, wherein the method further comprises:
[0284]
After the random access process is completed, the terminal device stops sending or receiving uplink and downlink signals related to the random access process.
[0285]
8. A random access method, wherein the method includes:
[0286]
The terminal device sends a random access preamble to the network device;
[0287]
When the terminal device has received the downlink allocation on the downlink control channel, and the received corresponding transport block is successfully decoded, or when the terminal device has received the downlink allocation on the downlink control channel, and the received corresponding When the transmission block of is successfully decoded and the condition of the first cell related to the random access preamble is satisfied, the terminal device determines that the random access process corresponding to the random access preamble is successfully completed;
[0288]
Wherein, the downlink control channel is a downlink control channel of the second cell and/or a downlink control channel for feeding back the random access preamble.
[0289]
9. The method according to appendix 8, wherein the first cell is:
[0290]
The cell where the random access process corresponding to the random access preamble is initiated; or,
[0291]
Send the cell where the random access preamble is located.
[0292]
10. The method according to appendix 8 or 9, wherein the condition is: the first cell and the second cell are the same, or the first cell and the second cell are different.
[0293]
11. The method according to Supplement 10, wherein the second cell is:
[0294]
Monitor and feed back the downlink allocated cell of the random access preamble; or,
[0295]
Special cell (SpCell).
[0296]
12. The method according to any one of appendix 8 to 11, wherein the transmission block is a transmission block received in the first cell.
[0297]
13. The method according to any one of appendix 8 to 12, wherein the random access preamble is a beam failure recovery request.
[0298]
14. The method according to any one of appendix 8 to 13, the downlink control channel is related to C-RNTI or RA-RNTI.
[0299]
15. The method according to any one of appendix 8 to 14, wherein the method further comprises:
[0300]
After the random access process is completed, the terminal device stops sending or receiving uplink and downlink signals related to the random access process.
[0301]
16. The method according to any one of appendix 1 to 15, wherein the method further comprises:
[0302]
The terminal device ignores possible measurement intervals.
[0303]
17. A data receiving method, wherein the method includes:
[0304]
The terminal device sends a random access preamble to the network device;
[0305]
The terminal equipment monitors downlink control information in the second cell; wherein, the downlink control information is related to the random access preamble;
[0306]
The terminal device receives the downlink data scheduled by the downlink control information in a first cell, where the first cell and the second cell are different.
[0307]
18. The method according to appendix 17, wherein the first cell is a cell that provides a reference signal index associated with the downlink data scheduled by the downlink control information, or,
[0308]
The first cell is the cell where the random access preamble is sent, or,
[0309]
The first cell is a cell where the beam failure recovery configuration corresponding to the random access preamble is sent.
[0310]
19. The method according to Supplement 17 or 18, wherein the random access preamble is sent according to a higher layer signaling configuration for beam failure recovery.
[0311]
20. The method according to any one of appendix 17 to 19, wherein the second cell is a cell where the downlink control information is monitored, or the second cell is a Spcell.
[0312]
21. The method according to any one of appendix 17 to 20, wherein the terminal device receives the downlink data according to the reference signal corresponding to the index selected in the configured candidate beam reference signal list.
[0313]
22. A data sending method, wherein the method includes:
[0314]
The network device receives the random access preamble sent by the terminal device;
[0315]
The network device sends downlink control information to the terminal device in the second cell; wherein the downlink control information is related to the random access preamble;
[0316]
The network device sends the downlink data scheduled by the downlink control information to the terminal device in a first cell, where the first cell and the second cell are different.
[0317]
23. The method according to appendix 22, wherein the first cell is a cell that provides a reference signal index associated with the downlink data scheduled by the downlink control information, or,
[0318]
The first cell is the cell where the random access preamble is received, or,
[0319]
The first cell is a cell where the beam failure recovery configuration corresponding to the random access preamble is received.
[0320]
24. The method according to appendix 22 or 23, wherein the random access preamble is received according to a higher layer signaling configuration for beam failure recovery.
[0321]
25. The method according to any one of Supplements 22 to 24, wherein the second cell is a cell where the downlink control information is sent, or the second cell is a Spcell.
[0322]
26. The method according to any one of Supplements 22 to 25, wherein the antenna port used by the network device to send the downlink data and the antenna port used to send the reference signal are quasi-co-located; wherein, the The network device configures the correspondence between the random access occasion (RACH occasion) of the random access preamble and the reference signal through high-level signaling.
Claims
[Claim 1]
A random access device, wherein the device comprises: a first sending unit, which is used to send a random access preamble to a network device; a first determining unit, which is used when the terminal device receives the first notification, or When the terminal device receives the first notification and satisfies the condition of the first cell related to the random access preamble, consider that the random access process corresponding to the random access preamble is successfully completed; wherein, The first notification is a notification sent from the lower layer of the terminal device that the downlink control channel transmission in the first cell is received, and/or sent from the bottom layer to feed back the random access Incoming preamble notification of downlink control channel transmission.
[Claim 2]
The apparatus according to claim 1, wherein the first cell is: a cell where a random access process corresponding to the random access preamble is initiated; or, a cell where the random access preamble is sent.
[Claim 3]
The apparatus according to claim 1, wherein the condition is: the first cell and the second cell are the same, or the first cell and the second cell are different.
[Claim 4]
The apparatus according to claim 3, wherein the second cell is: a cell where the downlink control channel transmission of the random access preamble is monitored and fed back; or, a special cell (SpCell).
[Claim 5]
The apparatus of claim 1, wherein the random access preamble is a beam failure recovery request.
[Claim 6]
The apparatus according to claim 1, wherein the downlink control channel transmission is addressed to C-RNTI or RA-RNTI.
[Claim 7]
The apparatus according to claim 1, wherein the apparatus further comprises: a first processing unit, configured to stop sending or receiving information related to the random access process when the random access process is successfully completed Line signals, and/or used to ignore possible measurement intervals.
[Claim 8]
A random access device, wherein the device includes: a second sending unit, which is used to send a random access preamble to a network device; and a second determination unit, which is used when the terminal device has received the downlink on the downlink control channel When the corresponding transmission block received is successfully decoded, or when the terminal device has received the downlink allocation on the downlink control channel, and the corresponding received transmission block is successfully decoded, and meets the requirements When entering the condition of the first cell related to the preamble, it is determined that the random access process corresponding to the random access preamble is successfully completed; wherein, the downlink control channel is the downlink control channel of the second cell and/or is used for feedback The random access preamble downlink control channel.
[Claim 9]
The apparatus according to claim 8, wherein the first cell is: a cell where the random access procedure corresponding to the random access preamble is initiated; or, the cell where the random access preamble is sent.
[Claim 10]
The apparatus according to claim 8, wherein the condition is: the first cell and the second cell are the same, or the first cell and the second cell are different.
[Claim 11]
The apparatus according to claim 10, wherein the second cell is: a cell that monitors and feeds back the downlink allocation of the random access preamble; or, a special cell (SpCell).
[Claim 12]
The apparatus according to claim 8, wherein the transport block is a transport block received in the first cell.
[Claim 13]
The apparatus according to claim 8, wherein the random access preamble is a beam failure recovery request.
[Claim 14]
The apparatus according to claim 8, wherein the downlink control channel is related to C-RNTI or RA-RNTI.
[Claim 15]
8. The apparatus according to claim 8, wherein the apparatus further comprises: a second processing unit, configured to stop sending or receiving information related to the random access process when the random access process is successfully completed Line signals, and/or used to ignore possible measurement intervals.
[Claim 16]
A data receiving device, wherein the device includes: a third sending unit, which is used to send a random access preamble to a network device; a monitoring unit, which is used to monitor downlink control information in a second cell; wherein, the downlink The control information is related to the random access preamble; a receiving unit configured to receive the downlink data scheduled by the downlink control information in a first cell, where the first cell and the second cell are different.
[Claim 17]
The apparatus according to claim 16, wherein the first cell is a cell that provides a reference signal index associated with the downlink data scheduled by the downlink control information, or the first cell is a cell that transmits the random The cell where the access preamble is located, or the first cell is the cell where the beam failure recovery configuration corresponding to the random access preamble is sent.
[Claim 18]
The apparatus according to claim 16, wherein the random access preamble is sent according to a higher layer signaling configuration for beam failure recovery.
[Claim 19]
The apparatus according to claim 16, wherein the second cell is a cell where the downlink control information is monitored, or the second cell is a Spcell.
[Claim 20]
The apparatus according to claim 16, wherein the random access preamble is a beam failure recovery request.