Random access power control method, device and communication system
Technical field
[0001]
The present invention relates to the field of communications, and in particular, to a random access power control method, device, and communication system.
Background technique
[0002]
In a Long Term Evolution (LTE, Long Term Evolution) system, a single random access process (Random Access Process) attempt is performed by a user equipment (UE, User Equipment) at the same time, and another one cannot be initiated until the random access attempt is confirmed to fail. The random access process tries to access again.
[0003]
In a contention based random access procedure (Contention based random access procedure), the user equipment randomly selects a preamble (Preamble) and sends it on a physical random access channel (Physical Random Channel, PRACH for short). In the non-contention-based random access process, the base station instructs the user equipment to use a certain preamble, and instructs the UE to use a specific PRACH time-frequency resource or instructs the UE to select the time-frequency resource by itself.
[0004]
It should be noted that the above introduction to the technical background is set forth only to facilitate a clear and complete description of the technical solution of the present invention and to facilitate understanding by those skilled in the art. It cannot be considered that these technical solutions are known to those skilled in the art simply because these solutions are described in the background of the present invention.
[0005]
Summary of the invention
[0006]
In LTE, the following formula (1) can be used to calculate the transmit power of the preamble:
[0007]
P PRACH＝min{P CMAX,c(i)，PREAMBLE_RECEIVED_TARGET_POWER+PL c}[dBm] (1)
[0008]
Among them, P CMAX, c (i) is the maximum transmission power of the UE for subframe i in cell c;
[0009]
PL c is the downlink path loss of cell c estimated by the UE;
[0010]
PREAMBLE_RECEIVED_TARGET_POWER is the preamble reception target power, and its expression is as follows (2):
[0011]
PREAMBLE_RECEIVED_TARGET_POWER＝preambleInitialReceivedTargetPower+DELTA_PREAMBLE+(PREAMBLE_TRANSMISSION_COUNTER–1)*powerRampingStep (2)
[0012]
Among them, DELTA_PREAMBLE is a pre-defined power offset value based on the preamble format; preambleInitialReceivedTargetPower and powerRampingStep are the initial target received power and power boost step for the preamble configured by the cell; PREAMBLE_TRANSMISSION_COUNTER is the preamble transmission count value, and its initial value is 1, if 1 random access attempt fails, each time the UE restarts a random access attempt, the count value is incremented by 1. When the value added is greater than the maximum number of transmissions configured by the cell, the UE reports the random access problem to the higher layer, and then the UE can Perform cell reselection.
[0013]
In LTE, the communication scenario of random access is relatively simple, and relatively few factors are considered when determining the transmission power of the preamble.
[0014]
However, the inventor of the present application found that in future wireless communication systems, such as 5G, New Radio (NR, New Radio) systems, the communication scenario of random access becomes more complicated and will introduce more possibilities that may cause the UE to randomly connect. Uncertain factors for the failure of the entry process, if the current mechanism is still used to determine the transmission power of the preamble, it is difficult to meet the requirements of complex communication scenarios, for example, the base station is sending multiple synchronization signals / physical broadcast signal blocks (SS / PBCH block) In the scenario where there are differences in path loss due to different SS / PBCH blocks, and the current method for determining the transmission power of the preamble does not take into account the above differences, it is difficult to accurately estimate the transmission of the preamble in a multi-beam scenario power. But there is currently no solution to the above problems.
[0015]
Therefore, considering the requirements of complex communication scenarios in future wireless communications, the embodiments of the present application provide a random access method, device, and communication system, which can be adapted to complex UE random access scenarios.
[0016]
According to a first aspect of this embodiment, a random access power control device is provided, and the device includes:
[0017]
A first calculation unit, which utilizes a path loss estimated based on a synchronization signal / physical broadcast signal block (SS / PBCH block) and / or channel state information reference signal (CSI-RS) currently selected by the user equipment, Calculate the transmit power used when the user equipment sends a random access preamble.
[0018]
According to a second aspect of this embodiment, a random access power control method is provided. The method includes:
[0019]
Use the path loss estimated based on the synchronization signal / physical broadcast signal block (SS / PBCH block) and / or channel state information reference signal (CSI-RS) currently selected by the user equipment to calculate the random access preamble sent by the user equipment The transmit power used.
[0020]
According to a third aspect of this embodiment, a random access power control device is provided, and the device includes:
[0021]
A second calculation unit, which calculates the transmit power of the preamble using a first parameter, where the first parameter includes: the number of sequences (N_seq.beam) received by a single receive beam of the user equipment, and / or the configuration adopted by the preamble Parameters or subcarrier bandwidth, and / or the type of the user equipment, and / or the gain of the transmit / receive beam of the user equipment.
[0022]
According to a fourth aspect of this embodiment, a random access power control method is provided. The method includes:
[0023]
Calculate the transmit power of the preamble using a first parameter, where the first parameter includes: the number of sequences (N_seq.beam) received by a single receive beam of the user equipment, and / or configuration parameters or subcarrier bandwidth used by the preamble And / or the type of the user equipment, and / or the gain of the transmit / receive beam of the user equipment.
[0024]
According to a fifth aspect of this embodiment, a communication system is provided, including a user equipment; wherein the user equipment utilizes a path loss estimated based on a synchronization signal / physical broadcast signal block (SS / PBCH block) currently selected by the user equipment , Calculating the transmit power used by the user equipment when sending the random access preamble; or, the user equipment calculates the transmit power using the first parameter,
[0025]
The beneficial effect of the embodiment of the present invention is that when calculating the transmission power used by the user equipment to transmit the random access preamble, the influence of various parameters is considered, and thus, it can be adapted to the UE random access process in a complex scenario.
[0026]
With reference to the following description and drawings, specific embodiments of the present invention are disclosed in detail, and the manner in which the principles of the present invention can be adopted is indicated. It should be understood that the embodiments of the present invention are not thus limited in scope. Within the scope of the terms of the appended claims, the embodiments of the present invention include many changes, modifications, and equivalents.
[0027]
Features described and / or illustrated for one embodiment may 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 .
[0028]
It should be emphasized that the term "comprising / comprising" as used herein refers to the presence of features, whole pieces, steps or components, but does not exclude the presence or addition of one or more other features, whole pieces, steps or components.
BRIEF DESCRIPTION
[0029]
Elements and features described in one drawing or one embodiment of the embodiments of the present invention may be combined with elements and features shown in one or more other drawings or embodiments. Furthermore, 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.
[0030]
The included drawings are used to provide a further understanding of the embodiments of the present invention, which form part of the specification, are used to illustrate the embodiments of the present invention, and together with the textual descriptions explain the principles 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, without paying creative labor, other drawings can be obtained based on these drawings. In the drawings:
[0031]
1 is a flowchart of a random access power control method according to Embodiment 1 of the present application;
[0032]
2 is a schematic diagram of a method for a UE to perform a random access attempt according to Embodiment 1 of this application;
[0033]
3 is a flowchart of a random access power control method according to Embodiment 2 of the present invention;
[0034]
4 is a schematic diagram of a random access power control device according to Embodiment 3 of the present application;
[0035]
5 is a schematic diagram of a random access power control device according to Embodiment 4 of the present application;
[0036]
6 is a schematic diagram of user equipment according to Embodiment 5 of the present application;
[0037]
7A is a schematic diagram of a communication system according to Embodiment 6 of the present application;
[0038]
7B is another schematic diagram of the communication system of Embodiment 6 of the present application;
[0039]
8 is a flowchart of an information indication method according to Embodiment 7 of the present application;
[0040]
9 is a flowchart of an information indication method according to Embodiment 8 of the present application;
[0041]
10 is a schematic diagram of an information indicating device according to Embodiment 9 of the present application;
[0042]
11 is a schematic diagram of an information indicating device according to Embodiment 10 of the present application;
[0043]
12 is a schematic diagram of the communication system of Example 11 of the present application;
[0044]
13 is a schematic diagram of a base station according to Embodiment 11 of the present application;
[0045]
14 is a schematic diagram of user equipment according to Embodiment 11 of the present application.
detailed description
[0046]
The foregoing and other features of the present invention will become apparent from the following description with reference to the drawings. In the specification and the drawings, specific embodiments of the present invention are disclosed in detail, which show some of the 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. 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 with reference to the drawings. These embodiments are only exemplary and are not limitations of the present invention.
[0047]
In the embodiments of the present invention, the terms "first", "second", etc. are used to distinguish different elements in terms of titles, but do not mean the spatial arrangement or chronological order of these elements, and these elements should not be used by these terms Restricted. The term "and / or" includes any and all combinations of one or more of the associated listed terms. The terms "comprising", "including", "having", etc. refer to the presence of stated features, elements, elements or components, but do not exclude the presence or addition of one or more other features, elements, elements or components.
[0048]
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 class" rather than being limited to the meaning of "a"; in addition, the term " "Description" 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 indicates otherwise.
[0049]
In the embodiments of the present invention, the term "communication network" or "wireless communication network" may refer to a network that conforms to any of the following communication standards, such as Long Term Evolution (LTE, Long Term Evolution), and Enhanced Long Term Evolution (LTE-A, LTE- Advanced), Wideband Code Division Multiple Access (WCDMA), High-Speed ​​Packet Access (HSPA, High-Speed ​​Packet Access), etc.
[0050]
In addition, the communication between devices in the communication system can be performed according to any stage of the 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 future 5G, New Radio (NR), etc., and / or other communication protocols that are currently known or will be developed in the future.
[0051]
In the embodiments of the present invention, the term "network device" refers to, for example, a device that connects a terminal device to a communication network and provides services for the terminal device in a communication system. 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.
[0052]
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 further include a remote radio head (RRH) , Remote Radio Unit (RRU, Remote Radio Unit), relay (relay) or low power node (such as femto, pico, etc.). And the term "base station" may include some or all of their functions, and each base station may provide communication coverage for a specific geographic area. The term "cell" may refer to a base station and / or its coverage area, depending on the context in which the term is used.
[0053]
In the embodiments of the present invention, the term "user equipment" (UE, User Equipment) or "terminal equipment" (TE, Terminal Equipment) refers to, for example, a device that accesses a communication network through a network device and receives network services. The user equipment 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, and so on.
[0054]
Among them, the user equipment may include but is not limited to the following devices: cellular phones (Cellular Phone), personal digital assistants (PDA, 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.
[0055]
For another example, in scenarios such as the Internet of Things (IoT, Internet of Things), the user equipment 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, Machine Type Communication) terminal, Vehicle-mounted communication terminal, device to device (D2D, Device to Device) terminal, machine to machine (M2M, Machine to Machine) terminal, etc.
[0056]
In this embodiment, the random access procedure may be a contention based random access procedure (Contention based random access procedure) or a non-contention based random access procedure (Non-contention based random access procedure). According to whether the network device can uniquely identify the random access process of a certain UE, the random access process is divided into a contention-based random access process and a non-contention-based random access process.
[0057]
The embodiments of the present invention will be described below with reference to the drawings.
[0058]
Example 1
[0059]
Embodiment 1 of the present invention provides a random access power control method, which is applied to a device side that initiates a random access process to a network side, such as a user equipment (UE) side.
[0060]
FIG. 1 is a flowchart of a random access power control method according to Embodiment 1 of the present invention. As shown in Figure 1, the method includes:
[0061]
Step 101: Use the path loss estimated based on the currently selected synchronization signal / physical broadcast signal block (SS / PBCH block) and / or channel state information reference signal (CSI-RS) of the user equipment to calculate when the user equipment sends a random access preamble The transmit power used.
[0062]
According to this embodiment, the path loss estimated based on the synchronization signal / physical broadcast signal block (SS / PBCH block) and / or channel state information reference signal (CSI-RS) selected by the UE is considered when calculating the transmission power of the preamble, Therefore, it can adapt to the random access process of the UE in complex scenarios such as multi-beam.
[0063]
In this embodiment, the base station may periodically send multiple synchronization signals / physical broadcast signal blocks (SS / PBCH blocks), or synchronization signal blocks (SSB), in a beam sweeping manner. The base station can configure PRACH resource / preamble set and divide it into multiple subsets, different SS / PBCH blocks and different physical random access channel resources / preamble A subset of (PRACH resource / preamble subset) is associated. The user equipment can select the cell and the SS / PBCH block in the cell through cell search, thereby determining the PRACH resource / preamble subset associated with the SS / PBCH block, and selecting and using the PRACH resource and preamble from the PRACH resource / preamble subset PRACH resource sends a message containing preamble.
[0064]
In this embodiment, when the random access attempt fails, the UE may re-select the SS / PBCH block from the cell, so as to switch a new PRACH resource / preamble subset to perform a random access attempt.
[0065]
In this embodiment, since the SS / PBCH block selected by the UE may change, the preamble transmission corresponding to the SS / PBCH block can be accurately calculated based on the estimated path loss based on the SS / PBCH block selected by the UE Power to adapt to the random access process of UEs in complex scenarios such as multi-beam.
[0066]
In this embodiment, the preamble transmission power P PRACH can be calculated according to the following formula (3) :
[0067]
P PRACH＝min{P CMAX,c,P PRACH,SSB}[dBm] (3)
[0068]
P CMAX, c is the maximum transmission power of the UE in cell c, P PRACH, SSB is the transmission power required by the UE to transmit the preamble calculated based on the power boost count and the path loss estimated based on the SS / PBCH block, for example, P PRACH, SSB can be obtained according to the following formula (4):
[0069]
P PRACH,SSB＝PREAMBLE_RECEIVED_TARGET_POWER+PL1 (4)
[0070]
Among them, PL1 is at least the estimated path loss based on the SS / PBCH block selected by the UE. PREAMBLE_RECEIVED_TARGET_POWER represents the target power received by the preamble, which can be obtained based on the power up count.
[0071]
PREAMBLE_RECEIVED_TARGET_POWER＝
[0072]
preambleInitialReceivedTargetPower+DELTA_PREAMBLE
[0073]
+(POWER_RAMPING_COUNTER–1)*powerRampingStep (5)
[0074]
Among them, preambleInitialReceivedTargetPower and powerRampingStep are the initial target received power and power boost step for the preamble configured by the cell; DELTA_PREAMBLE is a pre-defined power offset value based on the preamble format (Preamble Format); POWER_RAMPING_COUNTER represents the power boost count.
[0075]
In this embodiment, the initial value of the power up count may be 1, and each time the UE restarts a random access attempt, the power up count may be increased by 1.
[0076]
In this embodiment, each time the UE restarts a random access attempt, it can increase the preamble transmission count PREAMBLE_TRANSMISSION_COUNTER by 1.
[0077]
In this embodiment, the power up count POWER_RAMPING_COUNTER and the preamble transmission count PREAMBLE_TRANSMISSION_COUNTER may be equal or unequal.
[0078]
In this embodiment, the UE may report the first random access problem to a higher layer when the value of the preamble transmission count plus 1 is greater than the maximum number of transmissions configured by the cell, and then the UE may perform cell reselection.
[0079]
In this embodiment, the PL1 can be calculated based on the specific implementation of the UE. For example, the corresponding PL1 can be calculated based on the measurement value of the received power of the UE (RSRP1) corresponding to the SS / PBCH block currently selected by the UE, for example, according to Calculate by the following formula (4-1):
[0080]
PL1 = base station transmit power-UE receive power (RSRP1) (4-1)
[0081]
In this embodiment, there is another possible situation in the random access process of the UE: for a connected mode (CONNECTED mode) UE, a channel state information reference signal (CSI-RS) that can be configured for measurement, In addition, different CSI-RSs can correspond to different beams, so as to be associated with different physical random access channel resources / preamble subsets (PRACH resource / preamble subset), and the UE can reference signals based on channel state information ( CSI-RS) measurement results, select the PRACH resource corresponding to CSI-RS for random access.
[0082]
In step 101 of this embodiment, the path loss estimated based on the CSI-RS configured by the UE may also be used to calculate the preamble transmission power. For example, P PRACH, SSB can be calculated according to the following formula (4-2) :
[0083]
P PRACH,SSB＝PREAMBLE_RECEIVED_TARGET_POWER+PL2 (4-2)
[0084]
Among them, PL2 is the estimated path loss based on the CSI-RS configured by the UE.
[0085]
In step 101 of this embodiment, when calculating the preamble transmission power, either PL1 or PL2 may be used, or PL1 and PL2 may be used to form PL3, and PL3 may be substituted for PL1 in equation (4).
[0086]
In this embodiment, as shown in FIG. 1, the method further includes:
[0087]
Step 102: When obtaining the reported random access problem related to the user equipment reselecting the synchronization signal / physical broadcast signal block, set a power up count and / or a power up step.
[0088]
In this embodiment, when obtaining the reported random access problem related to the user equipment reselection of the synchronization signal / physical broadcast signal block (ie, the second random access problem), by setting the power up count and / or power up The step size can control the transmission power of the UE to transmit the preamble, so as to avoid interference to other UEs due to excessive transmission power when transmitting the preamble corresponding to the reselected SS / PBCH block.
[0089]
In this embodiment, the power-up count and / or power-up step may be set by a higher layer of the UE. For example, the power-up count and / or the power-up step may be reset to a predetermined value, for example, the power-up count is Set to 0 or halved.
[0090]
In this embodiment, in the case where the power up count and / or power up step is set in step 102, the UE may use the newly set power up count and / or power during the subsequent random access attempt The step size is increased to calculate the transmission power of the preamble, so the transmission power of the preamble can be controlled.
[0091]
In this embodiment, as shown in FIG. 1, the method further includes:
[0092]
Step 103: In the case where the user equipment reselects the synchronization signal / physical broadcast signal block (SS / PBCH block), report the random access problem related to the user equipment reselecting the synchronization signal / physical broadcast signal block.
[0093]
In this embodiment, as shown in FIG. 1, the method further includes:
[0094]
Step 104: When the user equipment reselects the synchronization signal / physical broadcast signal block (SS / PBCH block) and meets the first preset condition, report the randomness associated with the user equipment's reselection of the synchronization signal / physical broadcast signal block Access issues.
[0095]
In this embodiment, the first preset condition involved in step 104 may be at least one of the following conditions: the power up count is greater than the first threshold N_thre; the UE estimates based on the power up count and based on the reselected SS / PBCH block The transmission power of the preamble calculated by the path loss of is greater than the second threshold P_thre.
[0096]
In step 103 and step 104 of this embodiment, the random access problem (ie, the second random access problem) related to the user equipment reselecting the synchronization signal / physical broadcast signal block can be reported to the upper layer of the user equipment, the user When receiving the second random access problem, the upper layer of the device sets the power up count and / or the power up step.
[0097]
In this embodiment, as shown in FIG. 1, the method may further include:
[0098]
Step 102a: When the user equipment reselects the synchronization signal / physical broadcast signal block, or when the user equipment reselects the synchronization signal / physical broadcast signal block and meets the second preset condition, set the power up count and / or power Step up.
[0099]
In step 102a of this embodiment, the power up count and / or power up step may be set without reporting the second random access problem, for example, when setting the power up count and / or power up step When the unit at and the counting unit are at the same layer of the user equipment, the power up count and / or power up step may be set without reporting the second random access problem.
[0100]
In this embodiment, the second preset condition may be at least one condition listed in the above first preset condition.
[0101]
In this embodiment, as shown in FIG. 1, the method further includes:
[0102]
Step 105: When the parameter related to the synchronization signal / physical broadcast signal block (SS / PBCH block) currently selected by the user equipment meets the third preset condition, and / or the target synchronization signal / physical broadcast signal block (SS / PBCH block) When the relevant parameter meets the fourth preset condition, it is determined to select the target synchronization signal / physical broadcast signal block.
[0103]
Therefore, when the UE decides to restart a random access attempt, it can determine whether to re-select the SS / PBCH block. Therefore, it is possible to avoid selecting the SS / PBCH block too frequently, thereby avoiding the SS / PBCH block Between the ping-pong effect.
[0104]
In this embodiment, the third preset condition may be any one or a combination of two or more of the following conditions:
[0105]
(1) When the received power of the currently selected synchronization signal / physical broadcast signal block is less than the third threshold: for example, the UE can compare the received power RSRP of the currently selected SS / PBCH block with the third threshold X [dBm] if RSRP Z [dB], the UE may reselect the SS / PBCH block, otherwise, the UE does not reselect the SS / PBCH block.
[0108]
(3) When the number of transmissions with the maximum transmission power of the preamble calculated based on the currently selected synchronization signal / physical broadcast signal block is greater than or equal to the fifth threshold N:
[0109]
For example, the maximum transmission power of the preamble calculated based on the currently selected SS / PBCH block is Pmax . When the number of times the UE uses this maximum transmission power Pmax to send a preamble is greater than or equal to N, the UE may retransmit the next preamble Select the SS / PBCH block, otherwise, the UE does not re-select the SS / PBCH block.
[0110]
(4) When the time to try random access based on the currently selected synchronization signal / physical broadcast signal block is greater than or equal to the sixth threshold T [ms]:
[0111]
For example, if the time for the UE to try random access based on the current SS / PBCH block is greater than or equal to the sixth threshold T [ms], the SS / PBCH block can be reselected, otherwise, the UE cannot reselect the SS / PBCH block.
[0112]
In this embodiment, the fourth preset condition may include at least one of the following conditions:
[0113]
(1) When the difference between the received power of the target synchronization signal / physical broadcast signal block and the currently selected synchronization signal / physical broadcast signal block is greater than or equal to the seventh threshold:
[0114]
For example, the UE may compare the difference between the received power RSRP2 of the target SS / PBCH block and the currently selected SS / PBCH block RSRP1 (RSRP2-RSRP1) with the seventh threshold Y [dB], if (RSRP2-RSRP1) ≥Y [dB], the UE can select the target SS / PBCH block as a new SS / PBCH block, otherwise, the UE cannot re-select the SS / PBCH block.
[0115]
(2) When the difference between the maximum transmission power P CMAX, c of the user equipment in the cell and the preamble transmission power P _SSB calculated based on the target synchronization signal / physical broadcast signal block is greater than the eighth threshold W [dB]:
[0116]
For example, when P CMAX, c -P _SSB- > W dB, the UE can select the target SS / PBCH block as a new SS / PBCH block, otherwise, the UE cannot re-select the SS / PBCH block. In this embodiment, the first threshold, and / or the second threshold, and / or the third threshold, and / or the fourth threshold, and / or the fifth threshold, and / or the sixth threshold, and / Or the seventh threshold and / or the eighth threshold may be configured by the base station to the UE, for example, the base station may be configured through system messages, and / or RRC signaling, and / or physical layer control signaling, etc. In addition, this embodiment may not be limited to this, for example, the UE may also configure any one or more of the first threshold to the eighth threshold.
[0117]
The following describes a method for a random access attempt by a UE according to this embodiment with reference to an example. FIG. 2 is a schematic diagram of a method for a random access attempt by a UE of this embodiment. As shown in FIG. 2, the method includes:
[0118]
Step 201: The UE's previous random access attempt fails, and it is decided to restart a random access attempt;
[0119]
Step 202: The UE calculates the preamble transmission power P PRACH, SSB according to the power up count PRC and the estimated path loss based on the currently selected SS / PBCH block ;
[0120]
Step 203. Determine whether (P PRACH, SSB- P CMAX, c ) is greater than the threshold Z [dB]. If the judgment is "No", go to step 204, if the judgment is "Yes", go to step 208;
[0121]
Step 204, do not reselect the SS / PBCH block;
[0122]
Step 205: Increase the power up count PRC by 1 to update the PRC;
[0123]
Step 206: The UE recalculates the preamble transmission power P PRACH, SSB based on the updated power up count PRC and the estimated path loss based on the currently selected SS / PBCH block ;
[0124]
Step 207: The UE reselects the SS / PBCH block, and selects the PRACH resource corresponding to the reselected SS / PBCH block;
[0125]
Step 208: Determine whether the power up count PRC is greater than the first threshold N_thre. If the determination is "No", go to step 210; if the determination is "Yes", go to step 209;
[0126]
Step 209: Report the second random access problem to the upper layer, and the upper layer resets the power up count PRC, for example, sets the power up count PRC to half of the original value; or the upper layer repeats the power up step For example, set the power boost step to half of the original value.
[0127]
Step 210: The UE recalculates the preamble transmission power P PRACH, SSB according to the power boost count PRC, power boost step size, and path loss estimated based on the reselected SS / PBCH block ;
[0128]
Step 211: The UE determines the transmission power P PRACH of the preamble based on P PRACH and SSB based on the above equation (3) , and sends the preamble.
[0129]
In FIG. 2, the steps shown by the dashed box 20 indicate the process of the UE reporting the second random access problem to the higher layer when the new SS / PBCH block is selected.
[0130]
According to this embodiment, the path loss estimated based on the synchronization signal / physical broadcast signal block (SS / PBCH block) selected by the UE is taken into account when calculating the transmission power of the preamble, and thus it can adapt to the random access of the UE in complex scenarios such as multi-beam In addition, when the new SS / PBCH block is selected, the UE sets the power-up count and / or power-up step, thereby controlling the transmission power of the preamble and avoiding interference to other UEs; and, the UE The new SS / PBCH block is selected for preamble transmission only when the preset conditions are met, thereby avoiding the ping-pong effect between the SS / PBCH blocks.
[0131]
Example 2
[0132]
Embodiment 2 of the present invention provides a random access method, which is applied to a device side that initiates a random access process to a network side, such as a user equipment (UE) side.
[0133]
3 is a flowchart of a random access power control method according to Embodiment 2 of the present invention. As shown in Figure 3, it includes:
[0134]
Step 301: Calculate the transmit power of the preamble using the first parameter.
[0135]
In this embodiment, the first parameter may include, for example, the sequence number N_seq.beam of a single receive beam of the UE, and / or the number of sequences included in the preamble and the number of receive beams (beam), and / or configuration parameters adopted by the preamble or The bandwidth (numerology / SCS) of the subcarrier, and / or the type of the UE, and / or the gain of the TX / RX beam of the UE, etc.
[0136]
In addition, in this embodiment, the first parameter may not be limited to the parameters listed above.
[0137]
According to this embodiment, the first parameter is taken into consideration when calculating the preamble transmission power, thereby enabling the preamble transmission power to meet the requirements of complex communication scenarios.
[0138]
In this embodiment, the transmission power P ′ PRACH of the preamble can be determined according to the following formula (6):
[0139]
P PRACH＝min{P CMAX,c，P’ PRACH,SSB}[dBm] (6)
[0140]
Among them, P CMAX, c is the maximum transmission power of the UE in the cell c, P ' PRACH, SSB is the transmission power required by the UE to transmit the preamble calculated based on the power up count, the estimated value of the path loss, and the first parameter, for example The first parameter can be used to determine the power offset value, which can be introduced into the formula for calculating P ' PRACH, SSB .
[0141]
In one embodiment, the P ' PRACH can be calculated according to the power offset value DELTA_P set by the first parameter, the estimated value of the path loss, and the preamble received target power (PREAMBLE_RECEIVED_TARGET_POWER) obtained based on the power boost count , SSB , for example, P ' PRACH, SSB can be obtained according to the following formula (7):
[0142]
P’ PRACH,SSB＝PREAMBLE_RECEIVED_TARGET_POWER+PL’+DELTA_P (7)
[0143]
Where PL 'is the estimated value of the path loss of the path transmitting the prereamble, and the estimated value of the path loss may be the downlink path loss of cell c estimated by the UE, so that PL' may be equal to PLc in equation (1); , The estimated value of the path loss may also be an estimated path loss based on the SS / PBCH block selected by the UE, so that PL 'may be the same as PL1 in equation (4), PL2 in equation (4-2), or PL3 Are equal, and, in the case where PL ′ can be equal to PL1, PL2, or PL3 in equation (4), the random access method of this embodiment and the random access method of Embodiment 1 can be combined, that is, the Step 301 may be combined with step 101 of FIG. 1, whereby, based on the power up count (POWER_RAMPING_COUNTER), based on the synchronization signal / physical broadcast signal block (SS / PBCH block) and / or channel state information reference signal (CSI-) selected by the UE RS) The estimated path loss, and the first parameter to calculate the preamble transmission power; PREAMBLE_RECEIVED_TARGET_POWER represents the preamble reception target power, which can be obtained based on the power up count, for example, PREAMBLE_RECEIVED_TARGET_POWER can be obtained according to the above formula (5).
[0144]
In another embodiment, the P ′ PRACH, SSB can be calculated based on the preamble reception target power obtained based on the power offset value DELTA_P set by the first parameter and the power up count, and the path loss PL ′, for example P ' PRACH, SSB can be obtained according to the following formula (8):
[0145]
P’ PRACH,SSB＝PREAMBLE_RECEIVED_TARGET_POWER’+PL’ (8)
[0146]
Where, PREAMBLE_RECEIVED_TARGET_POWER 'is the preamble received target power obtained based on the power offset value DELTA_P set by the first parameter and the power up count, for example, PREAMBLE_RECEIVED_TARGET_POWER' can be obtained by using the following formula (9):
[0147]
PREAMBLE_RECEIVED_TARGET_POWER’＝
[0148]
preambleInitialReceivedTargetPower+DELTA_PREAMBLE+DELTA_P
[0149]
+(POWER_RAMPING_COUNTER–1)*powerRampingStep (9)
[0150]
Among them, preambleInitialReceivedTargetPower and powerRampingStep are the initial target received power and power boost step for the preamble configured by the cell; DELTA_PREAMBLE is a pre-defined power offset value based on the preamble format; POWER_RAMPING_COUNTER represents the power boost count; DELTA_P is based on this The power offset value set by the characteristic parameter.
[0151]
In the above formula (7) and formula (9), the power offset value DELTA_P is introduced into the calculation of P ' PRACH, SSB in the form of addition , but this embodiment is not limited to this, the power offset value DELTA_P can also be introduced into the calculation of P ' PRACH, SSB in the form of subtraction, and / or multiplication, and / or division, and / or exponential operation, and / or logarithm operation ; in addition, it can also be Under certain predetermined conditions, the power offset value DELTA_P is introduced into equation (7) or equation (9) to calculate P ' PRACH, SSB , for example, in the case where the preamble is a short sequence, for equation (9) , You can keep DELTA_P and delete DELTA_PREAMBLE, that is, replace DELTA_PREAMBLE with DELTA_P. In addition, in the case where the preamble is a long sequence, for equation (9), you can keep DELTA_PREAMBLE and delete DELTA_P.
[0152]
Next, the determination method of DELTA_PREAMBLE in equations (5) and (9) will be described.
[0153]
DELTA_PREAMBLE can be determined according to the preamble format.
[0154]
In this embodiment, for long sequences (sequence length L is 839) preamble, format0 (839) can be used as a reference format to determine the value of DELTA_PREAMBLE corresponding to other formats; for short sequences (sequence length L is 127 / 139, that is, 127 or 139) For preamble, a certain format (for example, format A0) in the short sequence (127/139) is used as a reference format to calculate the DELTA_PREAMBLE value corresponding to each other format, and the short sequence The DELTA_PREAMBLE value corresponding to the reference format can also be obtained by using the DELTA_PREAMBLE value corresponding to the long sequence reference format as a reference. Table 1 shows the values ​​of DELTA_PREAMBLE corresponding to each format.
[0155]
Table 1:
[0156]

[0157]
In Table 1, for each format 0, 1, 2, 3 corresponding to a long sequence, the corresponding DELTA_PREAMBLE can be directly determined from Table 1, where the value of DELTA_PREAMBLE corresponding to formats 1, 2, 3 is format 0 The corresponding DELTA_PREAMBLE value is obtained by reference. For each format corresponding to the short sequence, the DELTA_PREAMBLE value corresponding to the short sequence reference format can be used as the DELTA_PREAMBLE value corresponding to each format. In addition, the value of DELTA_PREAMBLE corresponding to the short sequence reference format is, for example, 14 dB. This value can be obtained by taking the value of DELTA_PREAMBLE corresponding to format 0 as the reference.
[0158]
In addition, in the above Table 1, Δf = 15 kHz represents the bandwidth of the subcarrier used in the preamble.
[0159]
In addition, the above Table 1 is only an example, and the value of DELTA_PREAMBLE corresponding to each format may also be other values.
[0160]
The method of calculating P ' PRACH and SSB based on each characteristic parameter will be described below.
[0161]
1. Calculate P ' PRACH, SSB according to the number of sequences (N_seq.beam) received by a single receive beam of the UE :
[0162]
The power offset value DELTA_P = DELTA_NoS determined based on N_seq.beam.
[0163]
In this embodiment, the DELTA_NoS corresponding to each format of the preamble of the long sequence (sequence length L is 839) and the short sequence (sequence length L is 127/139) is different. Table 2 is the DELTA_NoS list corresponding to the long sequence preamble.
[0164]
Table 2: L = 839
[0165]
[表 0001]
Format L DELTA_NoS
0 839 0dB
1 839 0dB
2 839 0dB
3 839 0dB
[0166]
Table 3 is the DELTA_NoS list corresponding to the short sequence preamble. Where, for example, when format A0 is used as the reference format to calculate the DELTA_PREAMBLE corresponding to the short sequence format, the DELTA_NoS can be determined according to the following formula (10):
[0167]

[0168]
Table 3: L = 127/139
[0169]

[0170]

[0171]
In Table 1 and Table 2, Fomat refers to the preamble format (Preamble Format), and "#of Sequence" represents the number of the received sequence (sequnce).
[0172]
For long-sequence preamble or short-sequence preamble, according to its N_seq.beam, DELTA_NoS shown in Table 2 or Table 3 can be substituted into equations (7) or (8), (9) to calculate P ' PRACH, SSB .
[0173]
In addition, in this embodiment, DELTA_NoS can also be introduced in formula (7) or formula (9) under certain predetermined conditions to calculate P ' PRACH, SSB , for example, a short sequence in the preamble (127/139) In the case of, you can keep DELTA_NoS in equation (7) or equation (9) and delete DELTA_PREAMBLE, that is, consider the effect of DELTA_No on the preamble transmission power only when the preamble is a short sequence (127/139) And replace DELTA_PREAMBLE with DELTA_NoS. In addition, when the preamble is a long sequence (839), you can keep DELTA_PREAMBLE in equation (7) or (9), and delete DELTA_NoS. For example, equation (9) can be written as follows (9a):
[0174]
PREAMBLE_RECEIVED_TARGET_POWER’＝preambleInitialReceivedTargetPower+DELTA_PREAMBLE(for 839)/DELTA_NoS(for 127/139)
[0175]
+(POWER_RAMPING_COUNTER–1)*powerRampingStep (9a)
[0176]
Among them, DELTA_PREAMBLE (for 839) / DELTA_NoS (for 127/139) means: when the preamble is a short sequence (127/139), take the value of DELTA_NoS, for example, you can refer to Table 3 above to determine the value of DELTA_NoS; When the preamble is a long sequence (839), the value of DELTA_PREAMBLE is taken. For example, the value of DELTA_PREAMBLE can be determined by referring to Table 1 above.
[0177]
2. Calculate P ' PRACH, SSB according to the configuration parameters or subcarrier bandwidth (numerology / SCS) adopted by the preamble :
[0178]
In this embodiment, for the case of a short sequence preamble, the transmission power of the short sequence preamble can be calculated based on the configuration parameters adopted by the preamble or the subcarrier bandwidth.
[0179]
Among them, the power offset value determined based on the configuration parameters adopted by the preamble or the subcarrier bandwidth (numerology / SCS) can be expressed as DELTA_P = DELTA_SCS, for example, DELTA_SCS can be determined according to the following formula (11):
[0180]
DELTA_SCS＝10log(μ+1) (11)
[0181]
Among them, μ represents the configuration parameter of the subcarrier bandwidth used by the preamble, the subcarrier bandwidth Δf used by the preamble can be expressed as Δf = 15 · 2 μ kHz, and the value of μ can be 0, 1, 2, or 3 Wait.
[0182]
For example, taking the transmission power required by the preamble whose SCS is 15 kHz as the reference transmission power, Δf = 15 · 2 μ kHz indicates the subcarrier bandwidth used by the preamble. Taking format A2 as an example, the power offset value DELTA_SCS from the reference transmission power It can be shown in Table 4 below.
[0183]
Table 4:
[0184]

[0185]
3. Calculate P ' PRACH, SSB according to UE type :
[0186]
In this embodiment, the UE type may refer to the service type of the UE, for example, and the power offset value determined based on the UE type may be expressed as DELTA_P = DELTA_UE.
[0187]
In this embodiment, a list of correspondences between the UE type and the DELTA_UE value may be preset to determine the DELTA_UE value corresponding to the UE type.
[0188]
Table 5 below is an example of the correspondence between the type of UE and the value of DELTA_UE.
[0189]

[0190]
In the above table, the UE type is 0, which means that the service type of the UE is capable of beam correspondence, and the DELTA_UE corresponding to this type is 0dB; The value of DELTA_UE corresponding to the type is 3dB.
[0191]
4. Calculate P ' PRACH, SSB according to the gain of the UE's transmit / receive beam :
[0192]
In this embodiment, the power offset value determined based on the gain of the transmission / reception beam of the UE may be expressed as DELTA_P = DELTA_Beam.
[0193]
In this embodiment, the value of DELTA_Beam corresponding to the gain of the transmission / reception beam may be determined by a preset correspondence list or formula between the gain of the transmission / reception beam and the value of DELTA_Beam.
[0194]
In this embodiment, at least one of DELTA_NoS, DELTA_SCS, DELTA_UE, and DELTA_Beam can be used as DELTA_P to calculate P ' PRACH, SSB , or a combination of two or more of them can be used as DELTA_P to calculate P' PRACH, SSB .
[0195]
In this embodiment, the UE may decide whether to re-select the SS / PBCH block for preamble transmission in the same manner as in embodiment 1; and, in the case where the UE re-selects the SS / PBCH block, the method described in embodiment 1 may be used The way to determine the timing for the UE to report the second random access problem, and the way in which the upper layer of the UE resets the power up count and / or the power up step is also the same as in Embodiment 1.
[0196]
5. Calculate P ' PRACH, SSB according to the number of sequences included in the preamble and the number of receiving beams :
[0197]
The specific method is similar to 1.
[0198]
According to this embodiment, the first parameter is taken into consideration when calculating the preamble transmission power, thereby enabling the preamble transmission power to meet the requirements of complex communication scenarios.
[0199]
Example 3
[0200]
This Embodiment 3 provides a random access power control device. Since the principle of the device to solve the problem is similar to the methods of Embodiments 1 and 2, the specific implementation can refer to the methods of Embodiments 1 and 2. The implementation of the same content will not be repeated.
[0201]
FIG. 4 is a schematic diagram of a random access power control apparatus according to Embodiment 3 of the present application. As shown in FIG. 4, the apparatus 400 includes a first calculation unit 401, and the first calculation unit 401 is used to calculate the preamble sent by the user equipment during the random access process. The transmit power used at the time.
[0202]
In this embodiment, the first calculation unit 401 uses the path loss estimated based on the currently selected synchronization signal / physical broadcast signal block (SS / PBCH block) and / or channel state information reference signal (CSI-RS) to calculate The transmission power used when the user equipment sends a random access preamble.
[0203]
In this embodiment, as shown in FIG. 4, the apparatus 400 may further have a first setting unit 402 when obtaining the reported random access problem related to the user equipment reselecting the synchronization signal / physical broadcast signal block , Set the power up count and / or power up step. In this embodiment, the setting unit 402 may be implemented by a high-level UE, and the high-level UE may be, for example, a media access control (Media Access Control, MAC) layer.
[0204]
In this embodiment, as shown in FIG. 4, the apparatus 400 may further have a first reporting unit 403, which is used to reselect the synchronization signal / physical broadcast signal block (SS / PBCH block) at the user equipment In this case, the random access problem related to the user equipment reselecting the synchronization signal / physical broadcast signal block is reported to the setting unit 402.
[0205]
In this embodiment, as shown in FIG. 4, the apparatus 400 may further have a second reporting unit 404, which is used to reselect the synchronization signal / physical broadcast signal block (SS / PBCH block) at the user equipment When the first preset condition is satisfied, the random access problem related to the user equipment reselecting the synchronization signal / physical broadcast signal block is reported to the setting unit 402.
[0206]
In this embodiment, the first preset condition is at least one of the following conditions:
[0207]
When the power up count is greater than the first threshold;
[0208]
When the transmission power calculated by the user equipment using the path loss estimated based on the synchronization signal / physical broadcast signal block reselected by the user equipment is greater than the second threshold.
[0209]
In this embodiment, as shown in 4, the apparatus 400 may further have a second setting unit 402a, when the user equipment reselects the synchronization signal / physical broadcast signal block, or when the user equipment reselects synchronization When the signal / physical broadcast signal block satisfies the second preset condition, the power up count and / or power up step is set.
[0210]
In this embodiment, the second setting unit 402a can be used without reporting to the second setting unit 402a the random access problem related to the UE's reselection of the SS / PBCH block (ie, the second random access problem) It is then possible to set the power-up count and / or the power-up step size, wherein the second setting unit 402a may be located in the physical layer of the UE, for example.
[0211]
In this embodiment, the second preset condition may be at least one condition listed in the above first preset condition.
[0212]
In this embodiment, as shown in FIG. 4, the apparatus 400 may further include a first determining unit 405, which is in synchronization with the user equipment currently selected synchronization signal / physical broadcast signal block (SS / PBCH block ) When the relevant parameter meets the third preset condition, and / or the parameter related to the target synchronization signal / physical broadcast signal block (SS / PBCH block) meets the fourth preset condition, it is determined to select the target synchronization signal / physical broadcast Signal block.
[0213]
In this embodiment, the third preset condition includes at least one of the following conditions:
[0214]
When the received power of the currently selected synchronization signal / physical broadcast signal block is less than the third threshold;
[0215]
When the difference between the preamble transmission power calculated based on the currently selected synchronization signal / physical broadcast signal block and the maximum transmission power of the user equipment in the cell is greater than a fourth threshold;
[0216]
When the number of transmissions with the maximum transmission power of the preamble calculated based on the currently selected synchronization signal / physical broadcast signal block is greater than or equal to the fifth threshold;
[0217]
When the time for which random access is attempted based on the currently selected synchronization signal / physical broadcast signal block is greater than or equal to the sixth threshold.
[0218]
In this embodiment, the fourth preset condition may include at least one of the following conditions:
[0219]
When the difference between the received power of the target synchronization signal / physical broadcast signal block and the currently selected synchronization signal / physical broadcast signal block is greater than or equal to the seventh threshold;
[0220]
When the difference between the maximum transmission power of the user equipment in the cell and the transmission power of the preamble calculated based on the target synchronization signal / physical broadcast signal block is greater than the eighth threshold.
[0221]
In this embodiment, when calculating the transmission power, the first calculation unit 401 can also calculate the transmission power according to the characteristic parameters related to the user equipment, that is, the first calculation unit 401 can calculate the transmission power based on The path loss estimated by the synchronization signal / physical broadcast signal block (SS / PBCH block) and / or channel state information reference signal (CSI-RS) selected by the device and the characteristic parameters related to the user equipment are calculated The transmit power used when sending the preamble during random access.
[0222]
For example, the first calculation unit 401 may calculate the transmission power according to the power offset value set by the first parameter, the path loss, and the preamble reception target power obtained based on the power up count; or, the first calculation unit 401 The transmission power is calculated according to the preamble reception target power obtained based on the power offset value set by the first parameter and the power up count, and the path loss.
[0223]
In this embodiment, the first parameter may include: the number of sequences (N_seq.beam) received by a single receive beam of the user equipment, and / or configuration parameters or subcarrier bandwidth used by the preamble, and / or the user equipment ’s Type, and / or gain of the transmit / receive beam of the user equipment.
[0224]
In this embodiment, the influence of the first parameter on the transmission power may be considered under preset conditions. For example, when the preamble is a short sequence (127/139), the influence of the first parameter on the transmission power is considered. When the preamble is a long sequence (839), the influence of the first parameter on the transmission power is not considered.
[0225]
In this embodiment, for a specific method of calculating the power offset value based on the first parameter and then calculating the transmission power, reference may be made to the description of Embodiment 2, and this embodiment will not be described again.
[0226]
According to the random access device of this embodiment, it can adapt to the random access process of the UE in complex scenarios such as multi-beam; and, when the new SS / PBCH block is selected, the UE sets the power up count and / or power up step Long, thus, the transmission power of the preamble can be controlled to avoid interference to other UEs; and the UE will select a new SS / PBCH block for preamble transmission only when the preset conditions are met, thereby avoiding the SS / PBCH block Between the ping-pong effect.
[0227]
Example 4
[0228]
This embodiment 4 provides a random access control device. Since the principle of the device to solve the problem is similar to the method of embodiment 2, the specific implementation can refer to the implementation of the method of embodiment 2, and the content is no longer the same. Repeat the description.
[0229]
FIG. 5 is a schematic diagram of a random access control apparatus according to Embodiment 4 of the present application. As shown in FIG. 5, the apparatus 500 includes a second calculation unit 501. The second calculation unit 501 is used to calculate when the user equipment sends a preamble during the random access process. The transmit power used.
[0230]
In this embodiment, the second calculation unit 501 can calculate the transmission power according to a first parameter related to the user equipment, where the first parameter includes: the number of sequences (N_seq.beam) received by a single receive beam of the user equipment, And / or the configuration parameter or subcarrier bandwidth used by the preamble, and / or the type of the user equipment, and / or the gain of the transmit / receive beam of the user equipment, etc.
[0231]
In this embodiment, for a specific method of calculating the power offset value based on the first parameter and then calculating the transmission power, reference may be made to the description of Embodiment 2, and this embodiment will not be described again.
[0232]
According to the random access device of this embodiment, it can adapt to the random access process of the UE in complex scenarios such as multi-beam.
[0233]
Example 5
[0234]
This Embodiment 5 provides user equipment configured with the random access control apparatus 400 or the random access control apparatus 500 as described in Embodiment 3 or Embodiment 4.
[0235]
6 is a schematic diagram of a structure of user equipment according to an embodiment of the present invention. As shown in FIG. 6, the user equipment 600 may include: a central processing unit (CPU) 601 and a memory 602; the memory 602 is coupled to the central processing unit 601. The memory 602 can store various data; in addition, a program for data processing is stored, and the program is executed under the control of the central processor 601 for random access.
[0236]
In one embodiment, the functions of the random access control device 400 or the random access control device 500 may be integrated into the central processor 601. The central processor 601 may be configured to implement the random access method described in Embodiment 1 or Embodiment 2.
[0237]
For example, the central processor 601 may be configured to calculate the path loss using the estimated path loss based on the synchronization signal / physical broadcast signal block (SS / PBCH block) and / or channel state information reference signal (CSI-RS) selected by the user equipment The transmission power used when the user equipment transmits the preamble during the random access process. Alternatively, the central processor 601 may be configured to calculate the transmission power using the first parameter.
[0238]
In addition, for other configuration methods of the central processor 601, reference may be made to Embodiment 1 and Embodiment 2, and details are not described herein again.
[0239]
In another embodiment, the random access control device 400 or the random access control device 500 may be configured separately from the central processor 601, for example, the random access control device 400 or the random access control device 500 may be configured to The chip connected to the processor 601, such as the random access unit shown in FIG. 6, implements the functions of the random access control device 400 or the random access control device 500 under the control of the central processor 601.
[0240]
In addition, as shown in FIG. 6, the user equipment 600 may further include: a communication module 603, an input unit 604, a display 606, an audio processor 605, an antenna 607, a power supply 608, and the like. Among them, the functions of the above components are similar to those in the prior art, and will not be repeated here. It is worth noting that the user equipment 600 does not necessarily include all the components shown in FIG. 6; in addition, the user equipment 600 may also include components not shown in FIG. 6, and reference may be made to the prior art.
[0241]
It can be known from the foregoing embodiment that the UE can adapt to the random access process of the UE in complex scenarios such as multi-beam.
[0242]
Example 6
[0243]
7A and 7B are schematic diagrams of the communication system of Embodiment 6. FIG. As shown in FIG. 7A, the communication system 700 includes a network device 701 and a user equipment 702 on the network side; the user equipment 702 utilizes a synchronization signal / physical broadcast signal block (SS / PBCH block) and / or channel based on the current selection of the user equipment The path loss estimated by the state information reference signal (CSI-RS) calculates the transmission power used by the user equipment when sending the random access preamble; or, the user equipment 702 uses the first parameter to calculate the transmission power. A network device 701 on the network side receives the preamble sent by the UE 702. In addition, a network device 701 on the network side may also configure, for the user equipment 702, any one or more of the first threshold to the eighth threshold used by the user equipment.
[0244]
As shown in FIG. 7B, the communication system 700 includes a plurality of network devices 701 and user equipment 702 on the network side; the user equipment 702 utilizes a synchronization signal / physical broadcast signal block (SS / PBCH block) and / or based on the current selection of the user equipment The path loss estimated by the channel state information reference signal (CSI-RS) calculates the transmission power used by the user equipment when sending the random access preamble; or, the user equipment 702 uses the first parameter to calculate the transmission power. A plurality of network devices 701 on the network side receive the preamble sent by the UE 702. In addition, the plurality of network devices 701 on the network side may also configure, for the user equipment 702, any one or more of the first threshold to the eighth threshold used by the user equipment.
[0245]
The configuration of the user equipment 702 is as described in Embodiment 5, and the working process of the system is as shown in Embodiment 1-4, and its contents are incorporated here, which will not be repeated here.
[0246]
It can be known from the above embodiments that the system can adapt to the random access process of UEs in complex scenarios such as multi-beam.
[0247]
Example 7
[0248]
Embodiment 7 of the present application provides an information indication method, which is applied to a network side, such as a network device.
[0249]
FIG. 8 is a schematic diagram of the information indication method of this embodiment. As shown in FIG. 8, the information indication method may include:
[0250]
Step 801: Send first indication information for indicating the location and / or number of time-frequency resources for transmitting a synchronization signal / physical broadcast signal block (SS / PBCH block) in the current cell, and / or for indicating transmission synchronization of a neighboring cell The second indication information of the location and / or number of time-frequency resources of the signal / physical broadcast signal block (SS / PBCH block).
[0251]
In this embodiment, by sending the first indication information and / or the second indication information, the time-frequency resources used for transmitting the SS / PBCH block can be indicated, which is convenient for the UE to send and receive data and perform measurements.
[0252]
In this embodiment, for different frequency ranges, the upper limit L of the number of time-frequency resources for transmitting the SS / PBCH block corresponding to the transmission period of the SS / PBCH block or SS burst set may be predefined, And all possible locations of time-frequency resources used to transmit SS / PBCH blocks under different upper limits. E.g:
[0253]
The frequency is less than 3GHz, L = 4;
[0254]
Frequency is 3GHz ～ 6GHz, L = 8;
[0255]
Frequency is 6GHz ～ 52.6GHz, L = 64
[0256]
On the basis of the above upper limit and position of the number of time-frequency resources, the network device may configure the number of time-frequency resources actually used to transmit the SS / PBCH block and the position of each time-frequency resource in one cycle of the SS / PBCH block.
[0257]
In this embodiment, the network device can indicate the time-frequency resources used to transmit the SS / PBCH block by sending the first indication information and / or the second indication information, which is convenient for the UE to send and receive data and perform measurements.
[0258]
In this embodiment, the first indication information and / or the second indication information may be any of the following:
[0259]
1. Information indicating whether each predetermined position in the time-frequency resource is used to transmit a synchronization signal / physical broadcast signal block:
[0260]
Wherein, the information indicating whether each predetermined position in the time-frequency resource is used to transmit the synchronization signal / physical broadcast signal block may be a bit; the predetermined position may be pre-configured by a network device, for example, and may be used to send SS / PBCH The location of the block's time-frequency resources.
[0261]
In this embodiment, the first indication information and / or the second indication information may be indicated based on a bit-map, for example, for each predetermined position, the time when the position may be indicated by 1 bit Whether the frequency resource is used to actually transmit the SS / PBCH block, for example, a bit of 1 indicates that the resource at the predetermined location is actually used to transmit the SS / PBCH block, and a bit of 0 indicates that the resource at the predetermined location is not actually used for transmission SS / PBCH block.
[0262]
2. Information indicating whether the packets at predetermined positions in the time-frequency resources are used to transmit synchronization signals / physical broadcast signal blocks:
[0263]
In this embodiment, the first indication information and / or the second indication information may be indicated based on a bit-map of the packet, for example, a predetermined number of slots (for example, 2 A) predetermined position as a group, for each group, 1 bit can be used to indicate whether there is time-frequency resource in the group for the actual transmission of SS / PBCH block, for example, a bit of 1 indicates that At least one of the group's resources is actually used to transmit the SS / PBCH block. When this bit is 0, it indicates that none of the group's resources are actually used to transmit the SS / PBCH block. In this embodiment, when the upper limit of the number of predetermined positions is 4 (if the number of predetermined positions of each group is 2), 2 bits of information may be used to indicate whether each group has resources to actually transmit the SS / PBCH block.
[0264]
3. The index corresponding to the predetermined transmission pattern:
[0265]
In this embodiment, a predetermined transmission pattern formed by transmitting the time-frequency resources of the SS / PBCH block may be defined in advance, and the correspondence between the predetermined transmission pattern and the index may be set. When the index information is included in the first indication information and / or the second indication information, the user equipment may determine the transmission mode according to the index, thereby determining the number and / or location of time-frequency resources that are actually used to transmit the SS / PBCH block.
[0266]
In this embodiment, the predetermined transmission mode may be, for example, that the SS / PBCH block is transmitted using only the previous possible resource position in a slot.
[0267]
4. The total number of positions in the time-frequency resource used to transmit the synchronization signal / physical broadcast signal block and / or the total number of positions in the time-frequency resource used to transmit the synchronization signal / physical broadcast signal block:
[0268]
For example, the first indication information and / or the second indication information may include the total number of time-frequency resources for transmitting the SS / PBCH block corresponding to one transmission period of the SS / PBCH block, and / or the last time-frequency resource Position, at this time, if the default SS / PBCH block is continuously transmitted from the first position of the predetermined time-frequency resource until the total number of transmissions or the end of the time-frequency resource is reached.
[0269]
5. The first position in the time-frequency resource used to transmit the synchronization signal / physical broadcast signal block, and the last position used to transmit the synchronization signal / physical broadcast signal block and / or the time-frequency resource used for transmission synchronization The total number of signal / physical broadcast signal block locations.
[0270]
For example, the first indication information and / or the second indication information may include a first position corresponding to one transmission period of the SS / PBCH block for transmitting time-frequency resources of the SS / PBCH block, and a last position for transmitting The location of the time-frequency resources of the SS / PBCH block and / or the total number of time-frequency resources used to transmit the SS / PBCH block.
[0271]
In this embodiment, as shown in FIG. 8, the method may further include:
[0272]
Step 802: Configure grouping of each predetermined position of the time-frequency resource.
[0273]
Thus, the user equipment can receive the configuration information, so as to determine which group of resources are used to transmit the SS / PBCH block according to the first indication information and / or the second indication information.
[0274]
In this embodiment, as shown in FIG. 8, the method may further include:
[0275]
Step 803: Configure the correspondence between the predetermined transmission mode and the index.
[0276]
Thus, the user equipment can receive the configuration information, so as to determine which transmission mode to use to transmit the SS / PBCH block according to the first indication information and / or the second indication information.
[0277]
In this embodiment, the network device may send the first indication information via system information (SI) and / or radio resource control (RRC) signaling. The system information may include, for example, a physical broadcast channel (PBCH), and / or remaining minimum system information (RMSI), and / or other information.
[0278]
In this embodiment, the network device may send the second indication information via measurement configuration information, and / or redirection configuration information, and / or a switching command.
[0279]
In this embodiment, the network device may configure the number of time-frequency resources actually used to transmit the SS / PBCH block and the position of each time-frequency resource in one cycle of the SS / PBCH block, and generate a One instruction.
[0280]
In this embodiment, the network device of the neighboring cell may send the first indication information generated based on the configuration result of the network device of the neighboring cell. The current network device of the serving cell receives the In the case of the first indication information sent by the network device, the first indication information may be processed to generate second indication information.
[0281]
For example, in this embodiment, the current network device of the serving cell may determine the time-frequency resource of the SS / PBCH block used by the neighboring cell for actual transmission based on the first indication information sent by the neighboring cell, and according to the determined time-frequency The resource determines the measurement window of the UE, and uses the measurement window to generate second indication information, whereby the second indication information may only indicate the time-frequency resource configuration of each neighboring cell in the measurement window for transmitting and transmitting the SS / PBCH block In some cases, the measurement window may not cover all possible positions of time-frequency resources for transmitting the SS / PBCH block in the neighboring cell.
[0282]
In this embodiment, based on the second indication information, the UE can obtain the configuration of the time-frequency resource used to transmit the SS / PBCH block of the neighboring cell.
[0283]
According to this embodiment, the UE can facilitate data transmission and reception and measurement.
[0284]
Example 8
[0285]
Embodiment 8 of the present application provides an information indication method, which is applied to a user equipment side, for example, user equipment.
[0286]
FIG. 9 is a schematic diagram of the information indication method of this embodiment. As shown in FIG. 9, the information indication method may include:
[0287]
Step 901: Receive first indication information for indicating the location and / or number of time-frequency resources of a current cell transmitting a synchronization signal / physical broadcast signal block (SS / PBCH block), and / or indicating the transmission synchronization of a neighboring cell The second indication information of the location and / or number of time-frequency resources of the signal / physical broadcast signal block (SS / PBCH block).
[0288]
In this embodiment, by receiving the first indication information and / or the second indication information, the time-frequency resource used for transmitting the SS / PBCH block can be indicated, which is convenient for the UE to send and receive data and perform measurement.
[0289]
In this embodiment, the description of the first indication information and / or the second indication information can refer to Embodiment 7.
[0290]
In this embodiment, as shown in FIG. 9, the method may further include:
[0291]
Step 902: Receive configuration information of the packet at each predetermined location.
[0292]
Thus, the user equipment can receive the configuration information, so as to determine which group of resources are used to transmit the SS / PBCH block according to the first indication information and / or the second indication information.
[0293]
In this embodiment, as shown in FIG. 9, the method may further include:
[0294]
Step 903: Receive configuration information of the correspondence between the predetermined transmission mode and the index.
[0295]
Thus, the user equipment can receive the configuration information, so as to determine which transmission mode to use to transmit the SS / PBCH block according to the first indication information and / or the second indication information.
[0296]
In this embodiment, the user equipment may receive the first indication information via system information (SI) and / or radio resource control (RRC) signaling.
[0297]
In this embodiment, the user equipment may receive the second indication information via measurement configuration information, and / or redirection configuration information, and / or a handover command.
[0298]
According to this embodiment, the UE can facilitate data transmission and reception and measurement.
[0299]
Example 9
[0300]
An embodiment of the present invention provides an information indicating device, which is configured at a sending end; this Embodiment 9 corresponds to the information method of Embodiment 7, and the same content is not described again.
[0301]
FIG. 10 is a schematic diagram of an information indicating device according to an embodiment of the present invention. As shown in FIG. 10, the information indicating device 1000 includes:
[0302]
A first sending unit 1001, which is used to send first indication information for indicating the location and / or number of time-frequency resources for transmitting a synchronization signal / physical broadcast signal block (SS / PBCH block) in the current cell, and / or Second indication information indicating the location and / or number of time-frequency resources for transmitting synchronization signals / physical broadcast signal blocks (SS / PBCH blocks) of neighboring cells.
[0303]
In this embodiment, the first sending unit 1001 may send the first indication information via system information (SI) and / or radio resource control (Radio Resource Control, RRC) signaling.
[0304]
In this embodiment, the first sending unit sends the second indication information via measurement configuration information, and / or redirection configuration information, and / or a handover command.
[0305]
In this embodiment, reference may be made to Embodiment 7 for the description of the first indication information and / or the second indication information.
[0306]
In this embodiment, as shown in FIG. 10, the device 1000 may further include a first configuration unit 1002 configured to configure the grouping at each predetermined position.
[0307]
As shown in FIG. 10, the apparatus 1000 may further include a second configuration unit 1003 configured to configure the correspondence between the predetermined transmission mode and the index.
[0308]
In this embodiment, the device 1000 may be configured in a period of the SS / PBCH block to actually transmit the number of time-frequency resources used for transmitting the SS / PBCH block and the location of each time-frequency resource, and generate based on the result of the configuration The first instruction.
[0309]
In this embodiment, the network device of the adjacent cell may send the first indication information generated based on the configuration result of the network device of the adjacent cell, and the device 1000 of the network device of the current cell receives the adjacent In the case of the first instruction information sent by the network device of the cell, the first instruction information may be processed to generate second instruction information. Therefore, the device 1000 of the present application may further include an instruction information generation unit (not shown) For the method of generating the second indication information by the indication information generating section, reference may be made to the description in Embodiment 7.
[0310]
Based on the second indication information, the UE can obtain the configuration of the time-frequency resource used to transmit the SS / PBCH block in the neighboring cell.
[0311]
According to this embodiment, the UE can facilitate data transmission and reception and measurement.
[0312]
Example 10
[0313]
An embodiment of the present invention provides an information indicating device, which is configured at a receiving end; this embodiment 10 corresponds to the information indicating method of embodiment 8, and the same content will not be repeated.
[0314]
FIG. 11 is a schematic diagram of an information indicating device according to an embodiment of the present invention. As shown in FIG. 11, the information indicating device 1100 may include:
[0315]
A first receiving unit 1101, configured to receive first indication information indicating the location and / or number of time-frequency resources for transmitting a synchronization signal / physical broadcast signal block (SS / PBCH block) in the current cell, and / or Second indication information indicating the location and / or number of time-frequency resources for transmitting synchronization signals / physical broadcast signal blocks (SS / PBCH blocks) of neighboring cells.
[0316]
In this embodiment, the first receiving unit 1101 receives the first indication information via system information (SI) and / or radio resource control (RRC) signaling.
[0317]
In this embodiment, the first receiving unit 1101 receives the second indication information via measurement configuration information, and / or redirection configuration information, and / or a handover command.
[0318]
In this embodiment, as shown in FIG. 11, the device 1100 may further include a second receiving unit 1102 configured to receive the configuration information of the packet at each predetermined location.
[0319]
As shown in FIG. 11, the apparatus 1100 may further include a third receiving unit 1103, which is configured to receive configuration information of the correspondence between the predetermined transmission mode and the index.
[0320]
According to this embodiment, the UE can facilitate data transmission and reception and measurement.
[0321]
Example 11
[0322]
An embodiment of the present invention also provides a communication system, and the same contents as those in Embodiments 7 to 10 are not described in detail.
[0323]
In this embodiment, the communication system may include:
[0324]
The sending end is configured with the information indicating device 1000 as described in Embodiment 9;
[0325]
The receiving end is configured with the information indicating device 1100 as described in Embodiment 10.
[0326]
FIG. 12 is a schematic diagram of a communication system according to an embodiment of the present invention, which schematically illustrates a case where a transmitting end is used as a user equipment and a receiving end is used as a base station. As shown in FIG. . The base station 1201 is configured with the information indicating apparatus 1000 as described in Embodiment 9, and the user equipment 1202 is configured with the information indicating apparatus 1100 as described in Embodiment 10.
[0327]
An embodiment of the present invention further provides a receiving end, which may be, for example, a base station, but the present invention is not limited to this, and may also be other network devices. The following uses the base station as an example.
[0328]
13 is a schematic diagram of the structure of a base station according to an embodiment of the present invention. As shown in FIG. 13, the base station 1300 may include: a central processing unit (CPU) 200 and a memory 210; the memory 210 is coupled to the central processing unit 200. The memory 210 can store various data; in addition, a program for information processing is stored, and the program is executed under the control of the central processor 200.
[0329]
Among them, the central processor 200 may be configured to implement the function of the information indicating device 1000.
[0330]
For example, the central processor 200 may be configured to enable control so that the base station executes the information indication method shown in Embodiment 7.
[0331]
In addition, as shown in FIG. 13, the base station 1300 may further include: a transceiver 220 and an antenna 230, etc .; wherein, the functions of the above components are similar to those in the prior art, and will not be repeated here. It is worth noting that the base station 1300 does not necessarily include all the components shown in FIG. 13; in addition, the base station 1300 may also include components not shown in FIG. 13, and reference may be made to the prior art.
[0332]
An embodiment of the present invention further provides a sending end, which may be, for example, user equipment, but the present invention is not limited to this, and may also be other network equipment. The following uses user equipment as an example for description.
[0333]
14 is a schematic diagram of user equipment according to an embodiment of the present invention. As shown in FIG. 14, the user equipment 1400 may include a central processor 100 and a memory 140; the memory 140 is coupled to the central processor 100. It is worth noting that the figure is exemplary; other types of structures can also be used to supplement or replace the structure to achieve telecommunications functions or other functions.
[0334]
Among them, the central processor 100 may be configured to implement the information indicating device 1100.
[0335]
For example, the central processor 100 may be configured to be able to control so that the user equipment performs the information indicating method shown in Embodiment 8.
[0336]
As shown in FIG. 15, the user equipment 1500 may further include: a communication module 110, an input unit 120, a display 160, and a power supply 170. Among them, the functions of the above components are similar to those in the prior art, and will not be repeated here. It is worth noting that the user equipment 1500 does not have to include all the components shown in FIG. 15, and the above components are not necessary; in addition, the user equipment 1500 may also include components not shown in FIG. 15. Have technology.
[0337]
An embodiment of the present invention also provides a computer-readable program, wherein when the program is executed in a random access power control apparatus or user equipment, the program causes the random access power control apparatus or user equipment to perform Embodiment 1. , The random access power control method described in 2.
[0338]
An embodiment of the present invention also provides a storage medium storing a computer-readable program, wherein the computer-readable program causes the random access power control apparatus or user equipment to perform the random access power control method described in Embodiment 1,2 .
[0339]
An embodiment of the present invention further provides a computer-readable program, wherein when the program is executed in an information device or a network device, the program causes the information device or user equipment to execute the information indication method described in Embodiment 7.
[0340]
An embodiment of the present invention further provides a storage medium storing a computer-readable program, wherein the computer-readable program causes an information indicating device or a network device to execute the information method described in Embodiment 7.
[0341]
An embodiment of the present invention also provides a computer-readable program, wherein when the program is executed in an information device or user equipment, the program causes the information device or user equipment to perform the information indication method described in Embodiment 8.
[0342]
An embodiment of the present invention further provides a storage medium storing a computer-readable program, wherein the computer-readable program causes the information indicating apparatus or user equipment to execute the information indicating method described in Embodiment 8.
[0343]
The above device and method of the present invention may be implemented by hardware, or may be implemented by hardware in combination with software. The present invention relates to such a computer-readable program which, when executed by a logic component, enables the logic component to implement the above-described device or component, or enables the logic component to implement the various methods described above Or steps. The invention also relates to storage media for storing the above programs, such as hard disks, magnetic disks, optical disks, DVDs, flash memories, and so on.
[0344]
The random access method in the random access device described in conjunction with the embodiment of the present invention may be directly embodied as hardware, a software module executed by a processor, or a combination of both. For example, one or more of the functional block diagrams shown in FIGS. 4, 5, 10, 11 and / or one or more combinations of the functional block diagrams may correspond to each software module of the computer program flow or may correspond to Various hardware modules. These software modules can correspond to the steps shown in Figures 1, 3, 8, and 9, respectively. These hardware modules can be realized by solidifying these software modules using a field programmable gate array (FPGA), for example.
[0345]
The software module may 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 an integral part 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 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 larger-capacity flash memory device, the software module may be stored in the MEGA-SIM card or a larger-capacity flash memory device.
[0346]
One or more of the functional block diagrams described in FIGS. 4, 5, 10, and 11 and / or one or more combinations of the functional block diagrams may be implemented as a general-purpose processor or digital signal processing for performing the functions described in this application (DSP), 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. For one or more of the functional block diagrams and / or one or more combinations of the functional block diagrams described with reference to FIGS. Multiple microprocessors, one or more microprocessors in communication with the DSP, or any other such configuration.
[0347]
The present invention has been described above in conjunction with specific embodiments, but it should be clear to those skilled in the art that these descriptions are exemplary and do not limit the protection scope 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.
[0348]
This application also contains the following additional notes:
[0349]
1. An information indicating device, including:
[0350]
A first sending unit, which is used to send first indication information for indicating the location and / or number of time-frequency resources for transmitting a synchronization signal / physical broadcast signal block (SS / PBCH block) in the current cell, and / or for indicating The second cell transmits the second indication information of the location and / or number of time-frequency resources of the synchronization signal / physical broadcast signal block (SS / PBCH block).
[0351]
2. The device according to Appendix 1, wherein:
[0352]
The first sending unit sends the first indication information via system information (SI) and / or radio resource control (Radio Resource Control, RRC) signaling.
[0353]
3. The device according to Appendix 1, wherein:
[0354]
The first indication unit sends the second indication information via measurement configuration information, and / or redirection configuration information, and / or a handover command.
[0355]
4. The device according to Appendix 1, wherein the first indication information and / or the second indication information include:
[0356]
Information indicating whether each predetermined position in the time-frequency resource is used to transmit a synchronization signal / physical broadcast signal block; or,
[0357]
Information indicating whether packets at predetermined positions in the time-frequency resource are used to transmit synchronization signal / physical broadcast signal blocks; or
[0358]
An index corresponding to a predetermined transmission pattern; or,
[0359]
The last position in the time-frequency resource used to transmit the synchronization signal / physical broadcast signal block and / or the total number of positions in the time-frequency resource used to transmit the synchronization signal / physical broadcast signal block; or,
[0360]
The first position in the time-frequency resource used to transmit the synchronization signal / physical broadcast signal block, and the last position used to transmit the synchronization signal / physical broadcast signal block and / or the time-frequency resource used to transmit the synchronization signal / The total number of physical broadcast signal block locations.
[0361]
5. The device according to Appendix 4, wherein the device further comprises:
[0362]
A first configuration unit configured to configure the grouping at each predetermined position.
[0363]
6. The device according to Appendix 4, wherein the device further comprises:
[0364]
The second configuration unit is configured to configure the correspondence between the predetermined transmission mode and the index.
[0365]
7. An information indicating device, including:
[0366]
A first receiving unit, configured to receive first indication information indicating the location and / or number of time-frequency resources for transmitting a synchronization signal / physical broadcast signal block (SS / PBCH block) in the current cell, and / or indicating The second cell transmits the second indication information of the location and / or number of time-frequency resources of the synchronization signal / physical broadcast signal block (SS / PBCH block).
[0367]
8. The device according to Appendix 7, wherein:
[0368]
The first receiving unit receives the first indication information via system information (SI) and / or radio resource control (Radio Resource Control, RRC) signaling.
[0369]
9. The device according to Appendix 7, wherein:
[0370]
The first receiving unit receives the second indication information via measurement configuration information, and / or redirection configuration information, and / or a handover command.
[0371]
10. The device according to Appendix 7, wherein the first indication information and / or the second indication information include:
[0372]
Information indicating whether each predetermined position in the time-frequency resource is used to transmit a synchronization signal / physical broadcast signal block; or,
[0373]
Information indicating whether packets at predetermined positions in the time-frequency resource are used to transmit synchronization signal / physical broadcast signal blocks; or
[0374]
An index corresponding to a predetermined transmission pattern; or,
[0375]
The last position in the time-frequency resource used to transmit the synchronization signal / physical broadcast signal block and / or the total number of positions in the time-frequency resource used to transmit the synchronization signal / physical broadcast signal block; or,
[0376]
The first position in the time-frequency resource used to transmit the synchronization signal / physical broadcast signal block, and the last position used to transmit the synchronization signal / physical broadcast signal block and / or the time-frequency resource used to transmit the synchronization signal / The total number of physical broadcast signal block locations.
[0377]
11. The device according to Appendix 10, wherein the device further comprises:
[0378]
The second receiving unit is configured to receive the configuration information of the packet at each predetermined position.
[0379]
12. The device according to Appendix 10, wherein the device further comprises:
[0380]
The third receiving unit is configured to receive configuration information of the correspondence between the predetermined transmission mode and the index.
[0381]
12. A communication system, the communication system comprising:
[0382]
The sending end is configured with the information indicating device according to claim 1;
[0383]
The receiving end is provided with the information indicating device according to claim 7.
[0384]
13. An information indication method, applied to the network side, including:
[0385]
Send first indication information for indicating the location and / or number of time-frequency resources of the current cell transmitting the synchronization signal / physical broadcast signal block (SS / PBCH block), and / or for instructing neighboring cells to transmit the synchronization signal / physical Second indication information of the location and / or number of time-frequency resources of the broadcast signal block (SS / PBCH block).
Claims
[Claim 1]
A random access power control apparatus, the apparatus includes: a first calculation unit that calculates the path loss using a path loss estimated based on a synchronization signal / physical broadcast signal block and / or channel state information reference signal currently selected by a user equipment The transmit power used when the user equipment sends the random access preamble.
[Claim 2]
The apparatus of claim 1, wherein the apparatus further comprises: a first setting unit that sets the power boost when obtaining the reported random access problem related to the user equipment reselection of the synchronization signal / physical broadcast signal block Count and / or power up steps.
[Claim 3]
The apparatus of claim 2, wherein the apparatus further comprises: a first reporting unit configured to report the randomness to the setting unit when the user equipment reselects the synchronization signal / physical broadcast signal block Access issues.
[Claim 4]
The apparatus according to claim 2, wherein: the apparatus further comprises: a second reporting unit, configured to: when the user equipment reselects the synchronization signal / physical broadcast signal block and the first preset condition is met, Report the random access problem to the setting unit.
[Claim 5]
The apparatus according to claim 4, wherein the first preset condition is at least one of the following conditions: when the power up count is greater than a first threshold; when the user equipment utilizes a reselection based on the user equipment When the transmission power calculated by the path loss estimated by the synchronization signal / physical broadcast signal block is greater than the second threshold.
[Claim 6]
The apparatus according to claim 1, wherein the apparatus further comprises: a second setting unit that reselects the synchronization signal / physical broadcast signal block when the user equipment reselects the synchronization signal / physical broadcast signal block When the signal block is broadcast and the second preset condition is met, the power up count and / or the power up step are set.
[Claim 7]
The apparatus according to claim 1, wherein the apparatus further comprises: a first determining unit that satisfies the third preset condition in the parameters related to the synchronization signal / physical broadcast signal block currently selected by the user equipment, and / Or when the parameter related to the target synchronization signal / physical broadcast signal block satisfies the fourth preset condition, determine to select the target synchronization signal / physical broadcast signal block.
[Claim 8]
The apparatus according to claim 7, wherein the third preset condition includes at least one of the following conditions: when the received power of the currently selected synchronization signal / physical broadcast signal block is less than the third threshold; based on the currently selected synchronization signal / When the difference between the transmission power of the preamble calculated by the physical broadcast signal block and the maximum transmission power of the user equipment in the cell is greater than a fourth threshold; the preamble calculated based on the currently selected synchronization signal / physical broadcast signal block When the number of times the maximum transmission power is transmitted is greater than or equal to the fifth threshold; when the time for which random access is attempted based on the currently selected synchronization signal / physical broadcast signal block is greater than or equal to the sixth threshold.
[Claim 9]
The apparatus of claim 7, wherein the fourth preset condition includes at least one of the following conditions: the reception power of the target synchronization signal / physical broadcast signal block and the reception of the currently selected synchronization signal / physical broadcast signal block When the difference in power is greater than or equal to the seventh threshold; when the difference between the maximum transmission power of the user equipment in the cell and the transmission power of the preamble calculated based on the target synchronization signal / physical broadcast signal block is greater than the eighth threshold.
[Claim 10]
The apparatus according to claim 1, wherein, when calculating the transmission power, the first calculation unit further calculates the transmission power using a first parameter, wherein the first parameter includes: the user equipment's The number of sequences received by a single receive beam, and / or the number of sequences included in the preamble and the number of receive beams, and / or the configuration parameters or subcarrier bandwidth used by the preamble, and / or the type of the user equipment, and / or the user The gain of the device's transmit / receive beam.
[Claim 11]
The apparatus of claim 10, wherein the first calculation unit is based on a power offset value set by the first parameter, the path loss, and a preamble reception target obtained based on the power boost count Power, calculate the transmission power; or the first calculation unit based on the preamble reception target power obtained based on the power offset value set by the first parameter and the power boost count, and the path loss, Calculate the transmission power.
[Claim 12]
A random access power control method, the method includes: calculating a path loss estimated by the user equipment using a path loss estimated based on a synchronization signal / physical broadcast signal block and / or channel state information reference signal currently selected by the user equipment The transmit power used during the preamble.
[Claim 13]
The method according to claim 12, wherein the method further comprises: setting a power up count and / or power up when obtaining the reported random access problem related to the user equipment reselection of the synchronization signal / physical broadcast signal block Step size.
[Claim 14]
The method according to claim 13, wherein the method further comprises: reporting the random access problem when the user equipment reselects a synchronization signal / physical broadcast signal block (SS / PBCH block).
[Claim 15]
The method according to claim 13, wherein the method further comprises: reporting to the institute when the user equipment reselects the synchronization signal / physical broadcast signal block (SS / PBCH block) and the first preset condition is met The random access problem is described.
[Claim 16]
The method according to claim 14, wherein the first preset condition is at least one of the following conditions: when the power up count is greater than a first threshold; when the user equipment utilizes a reselection based on the user equipment When the transmission power calculated by the path loss estimated by the synchronization signal / physical broadcast signal block is greater than the second threshold.
[Claim 17]
The method according to claim 12, wherein the method further comprises: when the user equipment reselects the synchronization signal / physical broadcast signal block, or when the user equipment reselects the synchronization signal / physical broadcast signal block and satisfies the first Under the second preset condition, set the power up count and / or power up step.
[Claim 18]
The method according to claim 12, wherein the method further comprises: satisfying the third preset condition when the parameter related to the synchronization signal / physical broadcast signal block currently selected by the user equipment meets, and / or synchronizing with the target When the parameter related to the signal / physical broadcast signal block satisfies the fourth preset condition, it is determined to select the target synchronization signal / physical broadcast signal block.
[Claim 19]
The method according to claim 12, wherein, in the step of calculating the transmission power, the transmission power is further calculated using a first parameter, and the first parameter includes: a sequence received by a single receive beam of the user equipment The number, and / or configuration parameters or subcarrier bandwidth used by the preamble, and / or the type of the user equipment, and / or the gain of the transmit / receive beam of the user equipment.
[Claim 20]
A communication system includes user equipment; wherein the user equipment includes the random access power control device according to any one of claims 1-12.