[0001] The present disclosure relates generally to wireless communications, and more particularly, to a wireless communication device and wireless communication method for a base station side and the user equipment side.
Background technique
[0002]
(LTE) R10 is defined in the LTE channel information reference signal (CSI-RS), can calculate the information of the UE fed back by measuring the CSI-RS, for example, a precoding matrix index (the PMI), a channel quality indication (CQI ) and rank indication (RI). There are different mechanisms CSI-RS, for example, based beamforming (beamformed) mechanism and a CSI-RS CSI-RS mechanism based on non-precoded (non-precoded) and the like.
[0003]
SUMMARY
[0004]
It gives a brief overview of embodiments of the invention hereinafter, in order to provide a basic understanding of some aspects of the invention. It should be understood that the following summary is not an exhaustive overview of the invention. It is not intended to identify key or critical part of the invention, nor is it intended to limit the scope of the present invention. Its sole purpose is to present some concepts in a simplified form, as a prelude to the more detailed description that is discussed later.
[0005]
According to one embodiment, there is provided a wireless communication apparatus for a base station side, comprising one or more processors. The processor is configured to obtain the distribution of user equipment, and determining a channel state information reference signal CSI-RS to be used based on the distribution mechanism of the user equipment. Further, the processor is further configured to generate indication information, the indication information for CSI-RS mechanism indicating to the user equipment to be used. Further, the processor is further configured to control the CSI-RS transmission to the user equipment based on the CSI-RS mechanism.
[0006]
According to another embodiment, there is provided a wireless communication method for a base station side. The method includes obtaining the distribution of user equipment, and the step of the channel state information reference signal CSI-RS mechanism to be used is determined based on the distribution of the user equipment. Furthermore, the method further comprises the step of generating indication information, the indication information for CSI-RS mechanism indicating to the user equipment to be used. Additionally, the method further comprises the step of controlling the CSI-RS transmits to the user equipment based on the CSI-RS mechanism.
[0007]
According to yet another embodiment, there is provided a wireless communication apparatus for a user equipment side, including one or more processors. The processor is configured to transmit an uplink signal to provide directional information to the control station, and parsing instruction information from the base station, the indication information indicating the channel state information reference signal CSI-RS mechanism to be employed. Further, the processor is further configured CSI-RS mechanism controlled according to the indicated measured CSI-RS from the base station.
[0008]
According to a further embodiment, there is provided a wireless communication method for a user equipment side. The uplink signal includes a step of controlling the transmission to provide directional information to the base station. The method further comprises the step of parsing the instruction information from the base station, the indication information indicating the channel state information reference signal CSI-RS mechanism to be employed. Furthermore, the method further comprises the step of measuring the CSI-RS from the base station in accordance with a control mechanism CSI-RS indicated.
[0009]
Embodiments of the present invention, by selecting an appropriate mechanism CSI-RS according to the distribution of the user equipment, can provide better performance CSI-RS.
BRIEF DESCRIPTION
[0010]
The present invention may be better understood by reference to the following description in conjunction with the accompanying drawings given, in which the same or similar reference numerals in the drawings to refer to the same or like parts. The drawings together with the detailed description are included in a part of the present specification and form of this specification, and serve to further illustrate the embodiments and explain the principles and advantages of the present invention is preferably present invention. In the drawings:
[0011]
FIG. 1 is a block diagram showing a configuration example of a wireless communication apparatus for the base station side according to one embodiment of the present invention;
[0012]
FIG 2 is a block diagram showing a configuration example of a wireless communication apparatus for a base station side according to another embodiment;
[0013]
FIG 3 is a flowchart illustrating an example of a process of a method for a wireless communication base station side according to one embodiment of the present invention;
[0014]
FIG 4 is a block diagram showing a configuration example of a wireless communication device for the user equipment side according to one embodiment of the present invention;
[0015]
FIG 5 is a block diagram showing a configuration example of a wireless communication apparatus for a user equipment side of another embodiment;
[0016]
FIG 6 is a flowchart illustrating an example of a process of a method for a wireless communication user equipment side according to one embodiment of the present invention;
[0017]
FIG 7 is a block diagram showing a configuration example of a wireless communication apparatus for the base station side according to one embodiment of the present invention;
[0018]
FIG 8 is a block diagram showing a configuration example of a wireless communication device for the user equipment side according to one embodiment of the present invention;
[0019]
FIG 9 is a block diagram of an exemplary configuration of a computer implemented method and apparatus illustrating the present disclosure;
[0020]
FIG 10 is a block diagram illustrating an example of a schematic configuration of a smart phone art shows the present disclosure may be applied;
[0021]
FIG 11 is a block diagram illustrating an eNB (evolved base station) illustrates the techniques of this disclosure may be applied schematic configuration;
[0022]
FIG 12 is a schematic view of the distribution of the user equipment and CSI-RS for explaining the mechanism;
[0023]
FIG 13 is a CSI-RS resources between base stations and the user equipment and a schematic configuration example of the measurement feedback process; and
[0024]
FIG 14 is a CSI-RS resources between base stations and the user equipment and a schematic configuration of another example of a measurement feedback process.
detailed description
[0025]
It will now be described with reference to the accompanying drawings of embodiments of the present invention. Elements and features of the elements and features described in one figure or one embodiment of the present invention may be illustrated embodiment with one or more other drawings or embodiments described combination. It should be noted that for purposes of clarity, the drawings and the description is omitted irrelevant to the present invention, shown and described are known to those of ordinary skill in the components and processes.
[0026]
1, the wireless communication device 100 according to the present embodiment comprises a processor 110. The processor 110 includes a determination unit 111, a generating unit 113 and control unit 115. It is noted that, although in the form of the drawings shows a functional block determination unit 111, a generating unit 113 and a control unit 115, it should be understood that the determination unit 111, function generation unit 113 and the control unit 115 by the processor 110 may be It is implemented as a whole, and not necessarily by the processor 110 in the separate components to achieve practical. Further, although to a block in FIG processor 110 is shown, however, the communication device 100 may include a plurality of processors, and the function determination unit 111, a generating unit 113 and the control unit 115 may be distributed to a plurality of processors, whereby by a plurality of cooperating processors to perform these functions.
[0027]
Determination unit 111 is configured to obtain the distribution of user equipment, and determining a channel state information reference signal (CSI-RS) to be used based on the distribution mechanism of the user equipment. For example, the distribution may be obtained by the user equipment in the following manner: to evaluate the distribution of the user equipment based on the directional information derived from the uplink signal of the user equipment. The uplink signals may include, for example, sounding reference signals (SRS), the directional information may comprise an SRS angle of arrival (AOA).
[0028]
In the actual scene, beamforming based on the CSI-RS mechanism based mechanisms are not mutually exclusive non-precoded CSI-RS and may exist simultaneously. Thus, according to one embodiment, determining the CSI-RS mechanism may include selecting beamforming CSI-RS and non-precoded at least a CSI-RS.
[0029]
More specifically, according to one embodiment, the determining unit 111 may be configured to select CSI-RS according to the distribution mechanism for the distribution of user equipment.
[0030]
Wherein the distribution density may be used to reflect the user, the user equipment may determine the distribution of a number of ways.
[0031]
For example, according to one embodiment, the density distribution may be, for example, the user equipment (SRS) is determined based on the detection of the reference signal from the user equipment. Wherein, SRS may be periodically sent by the user equipment. SRS is mainly used for uplink channel quality measurement, for frequency selective scheduling, and may be used as a measurement result of downlink beamforming. SRS parameters and on the specific configuration details about 36.211-5.5.3 see 3GPP protocol sounding reference signal.
[0032]
Analyzing embodiment of the present invention is determined manner CSI-RS mechanism may include dense or sparse CSI-RS to determine which mechanism the device uses an area according to a user profile based on the distribution of the user equipment. User equipment is dense or sparse distribution of the density determination can be based on a user device region is larger than a predetermined threshold value. A user profile in the region of dense (e.g., density region of the user equipment is higher than a predetermined threshold value), if employed beamforming CSI-RS mechanism, since the beam within a region too, so that between the beams may strong interference, which may degrade performance.
[0033]
Accordingly, beamforming CSI according to one embodiment, the determination unit 111 is configured in a case where the user density is higher than a predetermined level, selecting the non-precoded CSI-RS, in a case where the user density is below a predetermined level, select -RS.
[0034]
As described above, this embodiment is that the object to avoid interference between the beams, therefore, in this embodiment, the density level of the user with a predetermined spatial resolution beamforming CSI-RS concerned. For example, the predetermined density level of the user may correspond to a time between acceptable beamforming using CSI-RS mechanism beam interference level.
[0035]
Further, the region used to measure the density of the user may include the entire cell, and determines the CSI-RS mechanism for the entire cell. Alternatively, in one embodiment, may be in accordance with the distribution of the sub-area of ​​the user equipment in a cell served by a base station in, respectively, select the appropriate mechanisms CSI-RS for each sub-region according to.
[0036]
In particular, the cell may be divided into N partitions. The value N may be time varying, the base station may choose the value of N depending on the circumstances. For example, a cell may be divided into three sectors. Further, the partition is not limited to the horizontal partitions may be vertically partitioned. When needed more detailed results can use a larger N, i.e. the corresponding high resolution partitioning scheme. The size of the partition may also be associated with a single beam coverage.
[0037]
For each partition, the number of user equipment can be calculated in the partition (e.g., units of months), the user partition and calculate the density (/ partition) is calculated and the resulting density of users and a predetermined threshold value T (e.g., in units of a / partition) are compared. The value T may be determined, for example, test results in accordance with the actual system. When the value of N number of partitions is not the same cells, the corresponding T may be different. For each region, the region that is greater than T is densely distributed, and may employ non-precoded CSI-RS; otherwise the partition that is sparsely populated, and may employ beamforming CSI-RS.
[0038]
In addition, the following may also be considered by way of example:
[0039]
T is set to be a range, when the user of the target area density falls within the range T, the area is considered a user congested region; the user when the density is less than the lower limit T in the region for the user that a sparse area; when the user density is greater than T limit , that partition can not detailed enough, in this case, N can be increased, and increasing the threshold value corresponding to the N (or threshold range) is compared. N improving method may be stepped up can be improved by leaps and bounds.
[0040]
FIG 12 shows an example of the distribution of user equipment in a cell. In this example, the cell 1210 is divided into two sub-regions 1212 and 1214, sub-regions 1212 and the border 1214 1201 shown by dotted lines. 12, 1210 cells of different user devices of the distribution of different sub-regions, partial regions sparse user equipment, the user equipment partial regions densely distributed. Since beamforming CSI-RS and non-precoded CSI-RS mechanisms can coexist in one cell, the former applies to user equipment sparse, which is suitable for intensive distribution of user equipment. Thus, for example, for a user equipment within the sub-region 1212 may be non-precoded CSI-RS mechanism, and for the user equipment in the sub-region 1214 beamforming CSI-RS mechanism may be employed.
[0041]
Further, the user equipment is often the case with the changing distribution of time, correspondingly, applicable CSI-RS mechanisms may vary and it may be necessary to switch between different CSI-RS mechanism.
[0042]
With continued reference to FIG. 1, generating unit 113 is configured to generate indication information, the indication information for CSI-RS mechanism indicating to the user equipment to be used. For example, as described below with reference to specific examples in more detail below, the indication information may be included in a radio resource control (RRC) signaling.
[0043]
Further, the control unit 115 is configured as a CSI-RS to be employed in accordance with the mechanism, the control CSI-RS transmission to the user equipment. Accordingly, the user equipment can (CSI) report CSI-RS generated based on channel state information.
[0044]
Further, according to the control of the reception channel state information CSI report from the user equipment and / or parsing one embodiment, the control unit 115 may also be configured.
[0045]
For different CSI-RS mechanism, CSI format of the report may be different. More specifically, for non-precoded CSI-RS mechanism that CSI reporting format you can follow the current standard CSI reporting format; for CSI-RS beamforming mechanisms, the current standard does not define the format of the CSI reporting mechanisms.
[0046]
The CSI reporting one embodiment, the control unit 115 is configured for beamforming CSI-RS, received and / or parsing may comprise only channel quality indicator (CQI), while for non-precoded CSI-RS, the CSI report may comprise CQI, rank indication (RI) and precoding matrix Indicator (PMI).
[0047]
Next, a specific example will be described in conjunction with the notification mechanism of the determined CSI-RS to the user equipment and CSI reporting exemplary process corresponding base station-side apparatus according to an embodiment of the present invention. It is understood that the invention is not limited to the specific details of the following examples.
[0048]
In order to correct the feedback CSI reporting format, when the CSI-RS mechanism to be used is changed, the base station may notify the user equipment which is currently taken by the CSI-RS mechanism. For example, by modifying the IE physicalConfigDedicated signaling parameters 1bit added thereto, for example, referred to as CSI-RS-MODE, for informing a user equipment which is currently taken by the CSI-RS mechanism, and correspondingly, the user equipment should be used which CSI report format.
[0049]
More specifically, consider the following exemplary configurations:
[0050]
CSI-RS-MODE is 1, indicating that the user equipment using the CSI-RS beamforming mechanisms, and should be fed back to CSI-RS beamforming CSI report format;
[0051]
CSI-RS-MODE is 0, indicating that the user equipment using non-precoded CSI-RS mechanisms, and should be fed back to the non-precoded CSI reporting format a CSI-RS.
[0052]
Further, the user equipment has the capability to support the CSI feedback correct content and format, can be modified IE CQI-ReportConfig, for example, may be defined CQI-ReportConfig-r13, and modify the CQI-ReportConfig corresponding portions of the IE PhysicalConfigDedicated. Thus, in PhysicalConfigDedicated-r13, in addition to the defined parameters, including the newly defined parameters, e.g. CSI-RS-MODE and CQI-ReportConfig-r13. PhysicalConfigDedicated-r13 exemplary modified as follows:
[0053]
[0054]
Further, regarding the specific mode indication CSI reporting format to the user equipment, the current standard, a user equipment according to different needs, you may be fed back CQI only or simultaneous feedback PMI, RI and CQI, content of the feedback is to the IE CQI-ReportConfig RRC in controlled.
[0055]
RRC resources existing configuration process, when the IE CQI-ReportConfig parameter fields pmi-RI-Report does not exist, the user feedback device only CQI. The pmi-RI-Report whether there exist conditions PMIRI determined in turn.
[0056]
Therefore, in order for the user equipment when using the CSI-RS beamforming mechanisms (e.g., CSI-RS-MODE = 1) only the CQI report, this time domain parameter is not pmi-RI-Report (PMIRI does not exist). In order to enable a user equipment feedback PMI, RI and CQI in the use of non-precoded CSI-RS mechanism (e.g., CSI-RS-MODE = 0), this time-domain configuration parameters pmi-RI-Report (PMIRI present). Thus, it redefined IE CQI-ReportConfig, which parameter field pmi-RI-Report and presence PMIRI to support handover and beamforming coexistence mechanism CSI-RS and non-precoded CSI-RS mechanism CSI reporting format. For example, you may be defined as CQI-ReportConfig-r13, modified pmi-RI-Report and PMIRI:
[0057]
[0058]
[0059]
And pmi-RI-Report PMIRI been modified and described CQI-ReportConfig domain. For pmi-RI-Report, it is described in the new domain CQI-ReportConfig the following:
[0060]
The UE shall ignore pmi-RI-Report-r9 / pmi-RI-Report-r10 / pmi-RI-Report-r11 when pmi-RI-Report-r13 is configured for the serving cell on this carrier frequency (as for this carrier when the serving cell frequency allocation pmi-RI-Report-r13, UE shall ignore pmi-RI-Report-r9 / pmi-RI-Report-r10 / pmi-RI-Report-r11).
[0061]
For PMIRI, it is described in the new domain CQI-ReportConfig the following:
[0062]
If CSI-RS-MODE is set to 1, this field is not present, and if CSI-RS-MODE is set to 0, this field is present (if the CSI-RS-MODE is set to 1, this field is present, If the CSI-RS-MODE is set to 0, this field is not present).
[0063]
It described above with reference to specific examples for a base station-side wireless communication device in accordance with one embodiment of the present invention. By the above-described embodiment can be realized e.g. non-handover mechanism between a CSI-RS and CSI-RS Beamforming precoding mechanism.
[0064]
Non-precoded CSI-RS is provided covering the whole cell wide beam, the beam forming CSI-RS is provided with a narrow directivity beam. Since beamforming CSI-RS has directivity, the user equipment is greater than a gain of the non-precoded CSI-RS, so beamforming CSI-RS can provide better service to the device. However, as between different user devices directed beam distance is too small, interference between the beam produced is large, in this case more suitable non-precoded CSI-RS. Thus, suitable beamforming CSI-RS when the user equipment sparse, non-precoded suitably used when CSI-RS intensive. Since the user equipment distributed in each sub-region are not consistent in the case of a cell, may be present in different sub-regions and sparsely distributed densely distributed, the present embodiment can be well adapted to this, with a simple beamforming CSI-RS and simple, respectively non-precoded CSI-RS compared to embodiments of the present invention can provide better performance.
[0065]
Further, according to one embodiment of the present invention, can be provided corresponding CSI-RS resource for different CSI-RS mechanism.
[0066]
2, the wireless communication apparatus for a base station side 200 of the present embodiment includes one or more processors 210, processor 210 includes a determining unit 211, a generation unit 213, the control unit 215 and a setting unit 217. Determination unit 211, a generating unit 213 and a control unit 215 described above with reference to FIG. 1 determining unit 111, similar to the generating unit 113 and a control unit 115, a detailed description thereof will not be repeated.
[0067]
Setting unit 217 are configured to set the corresponding CSI-RS resource for a subset of beamforming CSI-RS and non-precoded CSI-RS.
[0068]
According to one embodiment, 217 pairs provided corresponding CSI-RS resource subset comprises setting unit may set according to the number of user equipment using beamforming CSI-RS and non-precoded CSI-RS respectively for CSI beamforming -RS and CSI-RS resource number of ports of non-precoded a CSI-RS. As generally understood in the art, CSI-RS port resources referred to herein corresponds to the CSI-RS for frequency resource.
[0069]
Accordingly, the generation unit 213 may be configured to generate an indication to a user equipment for a respective number of mechanisms CSI-RS port information.
[0070]
Further, according to one embodiment, the setting unit 217 is configured with a beamforming CSI-RS and non-precoded CSI-RS corresponding to the CSI-RS resource subsets arranged orthogonal to each other. With this configuration, it is possible to avoid the beamforming overlapping CSI-RS and non-precoded CSI-RS resources to achieve orthogonality, thereby eliminating the non-precoded CSI-RS interference beamforming the CSI-RS.
[0071]
In the case where the resources allocated to CSI-RS port number of forms, for example, resources may be allocated a subset of CSI-RS orthogonal to each other for beamforming CSI-RS and non-precoded CSI-RS in the following ways:
[0072]
From the first set of ports allocated port number, from the minimum to the CSI-RS resource beamforming CSI-RS and one non-precoded CSI-RS, the maximum port number from CSI-RS resource from a second set of ports assigned to another beamforming CSI-RS and non-precoded in the CSI-RS.
[0073]
Accordingly, the CSI-RS mechanism to be used corresponds to the second set of ports above case, the generation unit 213 may be configured to generate the selected port number from the maximum port CSI-RS resource instruction signal to the user equipment for make.
[0074]
Setting unit 217 is provided on the principles of CSI-RS allocation of resources for different subsets of CSI-RS mechanism, for example, may be adopted by way of example:
[0075]
Define a equilibrium factor "α" (0≤α≤1), and its value depends on the distribution of user equipment. For example, when the number of user equipment for allocating non-precoded CSI-RS account user equipment when a high proportion of the whole cell, whichever is less [alpha], i.e. to allocate more resources to the non-precoded CSI-RS, allocate less resource to a beamforming shaped CSI-RS; when the user device is adapted to assign a high number beamforming CSI-RS entire account user equipment cell ratio, whichever is greater [alpha], i.e. to allocate more resources to the beamforming CSI-RS, allocated less resources to non-precoded CSI-RS.
[0076]
Then, can be based on "α" is the value of CSI-RS resource is divided into two groups, e.g., group 1 and group 2. Wherein, for example, group 1 is assigned to beamforming CSI-RS, a group 2 is assigned to non-precoded CSI-RS. CSI-RS group 1 in the CSI-RS resource corresponding to the total number of ports is referred to as Portcount1, CSI-RS total number of ports 2 in the group corresponding to the CSI-RS resource referred to as Portcount2. For example, assume that CSI-RS total number of ports for the 8, there Portcount1 = INT (α * 8), Portcount2 = INT ((1-α) * 8), and Portcount1 + Portcount2 = N, wherein, the INT () denotes rounding , N is the total number of ports CSI-RS.
[0077]
Further, for example, the user equipment can be agreed upon in accordance with the existing standard arrangement of CSI-RS port Portcount1 positive sequence parsing, non-precoded CSI-RS mechanism from the smallest ID CSI-RS ports where the CSI-RS mechanism beamforming the user equipment needs to resolve Portcount2 port ID from the CSI-RS ports maximum reverse case. For example, when the current 8-port ID of CSI-RS ports 15-22, as it will be ID (15,16, ..., 15 + Portcount1-1) is allocated to the CSI-RS ports beamforming mechanism CSI-RS in group 2 group 1, ID is (22,21, ..., 22-Portcount2 + 1) is allocated to the CSI-RS ports non-precoded CSI-RS mechanism, and therefore when the parsing ports and resources allocated to the user equipment , beamforming may parse user equipment from the port 15 in the order according to established standard CSI-RS configuration where the CSI-RS mechanism Portcount1 port, the non-precoded CSI-RS mechanism where the user equipment needs to resolve from the reverse port 22 Portcount2 ports. Of course, it may be the above-described non-precoded CSI-RS allocation mechanisms and CSI-RS shaped beam interchange mechanism.
[0078]
Further, in case of need to select a port number from the maximum port CSI-RS resource may define a new signaling information to a user equipment an indication.
[0079]
Specifically, the user equipment supports the current standard CSI-RS ports 15 from the start ID to the positive sequence parsing the resource allocation and a CSI-RS port does not support the above-described non-precoded CSI-RS resource allocation method from the ID the case where reverse parsing CSI-RS ports 22, so that the user can not resolve equipment and CSI-RS port resources allocated properly. It is possible to define a new signaling, for example, referred to as NP-portsindicator, for example, the signaling 1bit. For example, when using a non-precoded CSI-RS mechanism, the base station may be NP-portsindicator (NP-portsindicator = 1) to the user equipment, to instruct the user equipment needs to parse Portcount2 reverse ports 22 from the port.
[0080]
However, resource groups are not limited by the above-described exemplary embodiment. According to one embodiment, setting the corresponding CSI-RS resource subset may include a port for a respective CSI-RS dispensing mechanism according to one of a plurality of predetermined ways. Further, information may be generated for indicating to a user equipment in a predetermined manner indicative of the employed. Resource packets in a predetermined manner, for example, may include cross-packet, randomized, etc. and the like.
[0081]
Next, a brief description of an example procedure of processing performed by a base station according to the wireless communication device and the user side apparatus of the embodiment of the present invention:
[0082]
First, the base station obtains the distribution of the user equipment by the user equipment periodically sends the SRS. The base station may determine that the user equipment the distribution density of users in different regions of the cell and the user density with a predetermined threshold value T is compared, when the user density is greater than T, it is considered that the region a user densely distributed, or that the area of ​​the user sparse. Based on the distribution of the user equipment, the base station may determine the cell in which different regions of each CSI-RS mechanism applies. CSI-RS mechanism when a region is changed, for example, the base station may notify the user of the device region by RRC signaling changes. Next, the base station may re-configure the corresponding CSI-RS resource for a user equipment. User equipment may be assigned to the measured CSI-RS resource feedback CSI and the CSI reporting format corresponds.
[0083]
Next, illustrate switching from non-precoded CSI-RS mechanism to CSI-RS beamforming mechanisms and switching from CSI-RS beamforming mechanism to the non-precoded CSI-RS example process mechanism 14 with reference to FIG. 13 and FIG.
[0084]
Figure 13 shows the switching from the non-precoded CSI-RS beamforming example process to the CSI-RS.
[0085]
In S1301, the base station and the user equipment currently used by non-precoded CSI-RS mechanism.
[0086]
In S1303, the base station transmits SRS period by the user equipment to obtain the distribution of the user equipment.
[0087]
Assuming S1305, the base station calculates the user density is less than threshold T, i.e., the region into a sparse distribution of the user equipment, the base station thus determines switching to the CSI-RS beamforming mechanism.
[0088]
Next, in S1307, for example, the base station notifies the user equipment through the RRC signaling this change, the user equipment reconfiguration corresponding CSI-RS resource.
[0089]
Wherein the CSI-RS resource can be notified to the user equipment via antennaPortsCount parameters (for details see 3GPP TS36.311 6.3.2) the prior IE AntennaInfo, i.e. the number currently assigned to the port. In the CSI-RS resource (port) are divided into two groups, each assigned to a beamforming CSI-RS and non-precoded CSI-RS case, antennaPortsCount IE AntennaInfo parameters can be modified to the number of ports corresponding PortCount1 beamforming provides for the CSI-RS or precoded CSI-RS port or PortCount2 for notifying the user equipment assigned to
[0090]
In S1309, the base station transmits beamforming CSI-RS to the user equipment.
[0091]
In S1311, the user equipment assigned to the resolved measurement CSI-RS resource, and using beamforming mechanism corresponding CSI-RS in the CSI feedback S1313 CSI reporting format (e.g., comprising only the CQI).
[0092]
FIG 14 shows an example of the process of switching from the CSI-RS beamforming non-precoded to the CSI-RS.
[0093]
In S1401, the base station and the user equipment is currently beamforming mechanism uses CSI-RS.
[0094]
In S1403, the base station transmits SRS period by the user equipment to obtain the distribution of the user equipment.
[0095]
Suppose calculated in S1405, the base station user density is greater than threshold T, i.e., the density distribution area of ​​the user equipment, the base station decides to switch to a non-precoded CSI-RS mechanism.
[0096]
Next, at S1407, the base station notifies the change to the user equipment through the RRC signaling, the reconfiguration for a user equipment corresponding to the CSI-RS resource. As described above, for example, by the number of CSI-RS ports antennaPortsCount parameter IE AntennaInfo the notification corresponding to the user equipment.
[0097]
Further, in S1409, the base station transmits signaling NP-portindicator (NP-portindicator = 1) to indicate how the resources allocated to the UE, e.g., indicating that the user equipment needs to parse Portcount2 reverse ports 22 from the port.
[0098]
In S1411, the base station transmits a non-precoded CSI-RS to the user equipment.
[0099]
In S1413, the user equipment assigned to the resolved measurement CSI-RS resource, and non-precoded CSI-RS corresponding mechanisms in the CSI feedback S1415 CSI reporting format (e.g., including PMI, CQI and RI).
[0100]
In the above description of a wireless communication apparatus for the base station side of an embodiment of the present invention obviously also discloses a method and procedure, then, is given in the case already described will not be repeated in detail according to the present invention radio communication method for a base station side of an embodiment.
[0101]
3, the wireless communication method of an embodiment, a base station side according to the present invention comprises the steps of:
[0102]
In S310, to obtain the distribution of user equipment, and determining a channel state information reference signal CSI-RS to be used based on the distribution mechanism of the user equipment.
[0103]
Next, at S320, it generates indication information, the indication information for CSI-RS mechanism indicating to the user equipment to be used.
[0104]
Next, in S330, the mechanism according to the CSI-RS determined, CSI-RS controls the transmission to the user equipment.
[0105]
Further, embodiments of the present invention further comprises a wireless communication device and wireless communication method for a user equipment side, some of these aspects and a base station side apparatus and methods previously described embodiments corresponds, so detailed description of these aspects is omitted.
[0106]
4, the wireless communication apparatus for a user equipment side of the embodiment 400 includes one or more processors 410. The processor 410 includes a parsing unit 411 and a control unit 413.
[0107]
Parsing unit 411 is configured to parse the instruction information from the base station, the indication information indicates CSI-RS mechanism to be employed.
[0108]
Wherein, CSI-RS mechanism selected beamforming CSI-RS and non-precoded CSI-RS. More specifically, CSI-RS mechanism, for example, may be determined by a base station side in accordance with user density within the region of the user equipment is located.
[0109]
The control unit 413 is configured in accordance with the indicated CSI-RS mechanism controls measured CSI-RS from the base station. Further, the transmission control is further configured to provide directional information to the base station control unit 413 of the uplink signal.
[0110]
According to one embodiment, the control unit 413 may also be configured to transmit a sounding reference signal (SRS) to a base station control which SRS comprises directional information of the user equipment. SRS may be a base station to determine the distribution of the user equipment within a predetermined area, and to determine the CSI-RS mechanism to be employed. For example, the control unit 413 may be configured to periodically issue the control SRS.
[0111]
Further, as described above, the base station distribution can be obtained by the user equipment demodulation reference signal (DMRS) from the user equipment. Alternatively, the base station may be arranged non-precoded CSI-RS resource give the user equipment, the non-precoded feedback CSI-RS resources corresponding to the CSI may be obtained by a user equipment user device profile.
[0112]
Further, according to one embodiment, the control unit 413 may also be configured to control to have been the following: The CSI-RS mechanism indicated by the base station, based on measurements of CSI-RS from the base station to generate channel state information (CSI) report .
[0113]
Wherein for beamforming CSI-RS, the generated CSI report may include channel quality indicator; for non-precoded CSI-RS, the generated CSI report may include channel quality indications, rank indication, and precoding matrix indicator.
[0114]
Further, the control unit 413 may also be configured to transmit the generated report to the base station to control the CSI. Wherein, according to CSI-RS mechanism indicated, the CSI CSI-RS resources for transmitting the configured report.
[0115]
And, beamforming and CSI-RS and CSI-RS resource subset of non-precoded CSI-RS corresponding to each other may be orthogonal to reduce interference between different CSI-RS mechanism.
[0116]
FIG. 5 shows a configuration example of a wireless communication apparatus for a user equipment side of another embodiment.
[0117]
4, the wireless communication apparatus for a user equipment side 500 of this embodiment includes one or more processors 510. The processor 410 includes a parsing unit 511, a selection unit 513 and control unit 515. Wherein the parsing unit 511 and the control unit 515 are respectively similar to the above analyzing unit 413 with reference to FIG. 4 and described in the control unit 411, a detailed description thereof will not be repeated.
[0118]
The selection unit 513 is configured as a number of CSI-RS resource for a respective CSI-RS mechanism based on an instruction from the base station to the port information, select the port for transmitting the CSI reports.
[0119]
Wherein the first set of port selection unit 513 can be played from the smallest port number of the CSI-RS resource selected port to send the CSI reporting. Alternatively, in response to a specific signaling (e.g., signaling the NP-portindicator) from the base station, a second set of ports starting from the highest number of CSI-RS resource for transmitting the selected port CSI reports.
[0120]
FIG 6 illustrates an example of a process of a method for wireless communication for user equipment side according to an embodiment of the invention.
[0121]
In S602, the control transmits an uplink signal to provide directional information to the base station. The uplink signal includes, for example SRS, and includes, for example, the directional angle of arrival information.
[0122]
In S610, parsing instruction information from the base station, the indication information indicating the channel state information reference signal CSI-RS mechanism to be employed.
[0123]
In S620, according to the CSI-RS mechanism indicated CSI-RS measurement control from the base station.
[0124]
Further, embodiments of the present invention further comprises a wireless communication device for a base station in FIG side in FIG. 7, and a wireless communication apparatus for a user equipment side as shown in FIG. 8.
[0125]
As shown in FIG. 7, the wireless communication apparatus for the base station side of one embodiment 700 comprises determining means 710, generating device 720, and a control means 730.
[0126]
Determining means 710 is configured to determine a channel state information reference signal CSI-RS mechanism to be employed. Generating means 720 is configured to generate indication information, the indication information for CSI-RS mechanism indicating to the user equipment to be used. The control device 730 is configured to control the CSI-RS transmission to the user equipment based on the CSI-RS mechanism.
[0127]
As shown, the wireless communication apparatus for a user equipment side of the embodiment 800 comprises a parsing device 810 and a control device 8208.
[0128]
Analytical apparatus 810 is configured to parse the instruction information from the base station, the indication information indicating the channel state information reference signal CSI-RS mechanism to be employed. The control device 820 is configured to control measurement of the CSI-RS from a base station according to the CSI-RS mechanism indicated.
[0129]
By way of example, various steps of the above method, and each module of the above-described apparatus and / or units may be implemented as software, firmware, hardware, or a combination thereof. In the case realized by software or firmware, a program constituting the software may be installed above-described embodiment of the method to the computer (e.g. a general purpose computer as shown in FIG. 9900) having a dedicated hardware configuration or a network from a storage medium, installed in the computer when there are a variety of programs, capable of performing various functions.
[0130]
9, the arithmetic processing unit of FIG (i.e., CPU) 901 or loaded according to a program read only memory (ROM) 902 stored in the storage section 908 to the program from the random access memory (RAM) 903 performs various processes. In the RAM 903, it is also necessary when storing data required when CPU 901 executes various processing and the like. CPU 901, ROM 902 and RAM 903 via bus 904 link to each other. The input / output interface 905 is also connected to the bus 904.
[0131]
The following components are linked with the input / output interface 905: an input section 906 (including a keyboard, a mouse, etc.), an output part 907 (including a display, such as a cathode ray tube (CRT), liquid crystal display (LCD) and the like, and a speaker, etc.) , a storage portion 908 (including a hard disk, etc.), the communication section 909 (including a network interface card such as a LAN card, modem, etc.). The communication section 909 performs communication via a network such as the Internet process. A drive 910 is also connected to the input / output interface 905. A removable medium 911 such as magnetic disk, optical disk, magneto-optical disk, a semiconductor memory and the like is mounted on the drive 910, such that a computer program read therefrom is installed into the storage section 908 as necessary.
[0132]
In the case where the foregoing series of processes by software, from a network such as the Internet or a storage medium such as the removable media 911 constituting the software installation program.
[0133]
Those skilled in the art will appreciate, such a storage medium is not limited to that shown in FIG. 9, wherein the program is stored, distributed separately from the device to the removable medium 911 providing program to the user. Removable medium 911 include the magnetic disk (including a floppy disk (registered trademark)), CD (compact disc read-only memory that contains (CD-ROM) and digital versatile disc (DVD)), magneto-optical disk (including a Mini Disk (MD) (registered trademark )) and a semiconductor memory. Alternatively, the storage medium may be a ROM 902, storage section 908 comprising a hard disk and the like, in which the program and distributed to the user together with the device containing them.
[0134]
Embodiments of the present invention further relates to a program product storing machine-readable instruction codes. When the instruction code read and executed by a machine, perform the method according to embodiments of the present invention as described above.
[0135]
Accordingly, program product, for bearing the instruction codes are stored in a machine-readable storage medium is also included in the present invention is disclosed. The storage medium includes, but not limited to, floppy diskettes, optical disks, magneto-optical disk, memory card, memory stick and the like.
[0136]
Embodiments of the present application also relates to the following electronic equipment. In the case of the electronic device for a base station side, the electronic device may be implemented as any type of evolved Node B (eNB), such as a macro eNB, and a small eNB. Small eNB may cover less than a macro cell eNB cell, such as a pico eNB, the eNB and the micro family (femto) eNB. Instead, the electronic device may be implemented as any other type of base station, such as base transceiver stations and NodeB (BTS). The electronic device may include: a body configured to control wireless communication (also referred to as base station apparatus); and one or more remote radio heads disposed at different places of the main body (RRH). Further, the following various types of terminals can be described by a semi-persistently or temporarily perform the base station functions as a work station.
[0137]
A case where an electronic device for user equipment side, may be implemented as a mobile terminal (such as a smart phone, a tablet personal computer (PC), a notebook PC, a portable game terminal, a portable / mobile router and dongle type digital camera) or vehicle terminal (such as car navigation devices). In addition, the electronic device may be a wireless communication module on each terminal attached to the terminal (such as a single or a plurality of wafer including an integrated circuit module).
[0138]
[Application example on the terminal device]
[0139]
FIG 10 is a schematic block diagram of an arrangement 2500 shown in the present disclosure may be applied to smart phone technology. A smart phone 2500 includes a processor 2501, memory 2502, storage device 2503, an external connection interface 2504, the image pickup device 2506, a sensor 2507, a microphone 2508, an input device 2509, a display device 2510, a speaker 2511, a wireless communication interface 2512, one or more antenna switch 2515, one or more antennas 2516, bus 2517, a battery 2518 and an auxiliary controller 2519.
[0140]
The processor 2501 may be, for example, (SoC), or on a CPU chip, a smart phone and controls the application layer and the additional layer 2500 function. The memory 2502 includes a RAM and ROM, and stores data and programs executed by the processor 2501. Memory device 2503 may include a storage medium, such as a semiconductor memory and a hard disk. 2504 external connection interface for connecting an external device (such as a memory card, and a universal serial bus (USB) device) 2500 to the smart phone interfaces.
[0141]
Image pickup apparatus 2506 includes an image sensor (such as a charge coupled device (CCD) and complementary metal oxide semiconductor (CMOS)), and generates a captured image. Sensor 2507 may include a set of sensors, such as a measuring sensor, a gyro sensor, a geomagnetic sensor and an acceleration sensor. Microphone input to the smart phone 2508 2500 sound into an audio signal. The input device 2509 comprises, for example, it is configured to detect a touch on the screen of the touch sensor device 2510, a keypad, a keyboard, buttons or switches displayed, and receives operation input from a user or information. The display device 2510 includes a screen (such as a liquid crystal display (LCD) and organic light emitting diode (OLED) display), and displays the output image 2500 is a smart phone. The audio output signal is converted from a smart phone 2500 2511 speaker sound.
[0142]
A wireless communication interface 2512 to support any cellular communications scheme (such as LTE and LTE-A), and performs wireless communication. Wireless communication interface 2512 may generally comprise, for example, a processor 2513 and a radio frequency baseband (BB) (RF) circuit 2514. BB processor 2513 may perform, for example, encoding / decoding, modulation / demodulation, and a multiplexing / demultiplexing, and performs various types of signal processing for wireless communication. Meanwhile, RF circuitry 2514 may include, for example, mixers, filters and amplifiers, and to transmit and receive wireless signals via the antenna 2516. For wireless communication interface 2512 may be integrated with the BB processor 2513 and an RF circuit chip 2514 of a module. , The wireless communication interface 2512 in FIG. 10 may include a plurality of processors BB plurality of RF circuits 2513 and 2514. Although FIG. 10 shows a state where a wireless communication interface 2512 comprises a plurality of processors BB plurality of RF circuits 2513 and 2514 of the example, the wireless communication interface 2512 may also include a single processor BB 2513 or 2514 single RF circuit.
[0143]
Further, in addition to a cellular communication scheme, a wireless communication interface 2512 may support additional types of wireless communication scheme, such as a short-distance wireless communication scheme, a near field communication scheme and wireless local area network (LAN) scheme. In this case, a wireless communication interface 2512 may include a processor 2513 BB for each wireless communication scheme and the RF circuit 2514.
[0144]
Each of the circuits comprises a plurality (e.g. a circuit for different wireless communication schemes) in a wireless communication interface 2512 and switch between antenna connection destination of the antenna switch 2516 in 2515.
[0145]
Each antenna 2516 includes a single or a plurality of antenna elements (such as including a plurality of antenna elements in MIMO antenna), and 2512 for transmitting and receiving wireless signal from the wireless communication interface. As illustrated, a smart phone 250010 2516 may include multiple antennas. Although FIG. 13 shows an example wherein a plurality of smart phone 2500 includes an antenna 2516, but a smart phone 2500 may include a single antenna 2516.
[0146]
In addition, the smart phone 2500 may include an antenna for wireless communication scheme for each of 2516. In this case, the antenna switch 2515 may be omitted from the configuration of the smartphone 2500.
[0147]
2517 bus processor 2501, memory 2502, storage device 2503, an external connection interface 2504, the image pickup device 2506, a sensor 2507, a microphone 2508, an input device 2509, a display device 2510, a speaker 2511, a wireless communication interface 2512 and an auxiliary controller 2519 each other connection. Smartphone respective blocks 2500 through 2518 illustrated in FIG feeder 13 to provide the battery power, in FIG feeder are partially shown as a dashed line. Example, auxiliary controller 2519 operates the smartphone 2500 minimum necessary functions in the sleep mode.
[0148]
Smart phone 2500 shown in FIG. 10, the function of each unit with reference to FIG. 4 and FIG. 5 described with at least a portion of 2519 may be implemented by the processor 2501 or the secondary controller. For example, battery power consumption may be reduced by the secondary controller 2518. Processor 2519 performs some of the functions 2501. Further, processor 2501 or controller 2519 may perform auxiliary functions with reference to FIGS. 4 and 5 described respective units by executing at least part of the memory 2502 or storage device 2503 stores a program.
[0149]
[Application Example of the base station on]
[0150]
FIG 11 is a schematic block diagram of an eNB illustrating the present disclosure may be applied technology configuration. eNB 2300 includes one or more antennas 2310 and base station apparatus 2320. Each base station apparatus 2320 and antenna 2310 may be a cable connected to each other via radio frequency (RF).
[0151]
Each antenna 2310 includes a single or a plurality of antenna elements (such as including a multiple input multiple output (MIMO) antennas in a plurality of antenna elements), and base station apparatus 2320 to transmit and receive wireless signals. As shown in FIG. 11, eNB 2300 can comprise a plurality of antennas 2310. For example, multiple antennas may be compatible with a plurality of frequency bands used by eNB 2300 2310. Although FIG. 11 shows an example in which a plurality of antennas 2310 comprises eNB2300 examples, the eNB 2300 may also include a single antenna 2310.
[0152]
The base station apparatus 2320 includes a controller 2321, a memory 2322, a network interface 2323 and a wireless communication interface 2325.
[0153]
The controller 2321 may, for example, CPU or DSP, and operation of the various higher layer of the base station apparatus 2320. For example, the controller 2321 generates packet data according to the data signal processed by the wireless communication interface 2325 and to send the generated packet via the network interface 2323. The controller 2321 may be tied to the data from the baseband processor to generate a plurality of packet bundle, bundling and transmitting the generated packet. The controller 2321 may have a function to execute control logic: the control such as a radio resource control, radio bearer control, mobility management, admission control and scheduling. This control may be incorporated close to the core network node or the eNB performed. The memory 2322 includes a RAM and ROM, and stores programs and various kinds of control performed by the data controller 2321 (such as a list of the terminal, the transmission power data and schedule data).
[0154]
The network interface 2323 for the base station apparatus 2320 is connected to a core network communications interface 2324. The controller 2321 may communicate with the core network node or another eNB via the network interface 2323. In this case, eNB 2300 and the core network node or the eNB may be connected to each other through the logical interface (such as the S1 interface and the X2 interface). The network interface 2323 may also be a wireless communication interface, or a wired communication interface for the wireless backhaul. If the network interface is a wireless communication interface 2323, compared with the band used by the wireless communication interface 2325, network interface 2323 can use a higher frequency band for radio communication.
[0155]
A wireless communication interface 2325 to support any cellular communication protocol (such as Long Term Evolution (LTE) and LTE- Advanced), and via the antenna 2310 is supplied to a terminal located in the cell eNB 2300 wireless connection. Wireless communication interface 2325 may generally comprise, for example, a processor 2326 and an RF circuit BB 2327. BB processor 2326 may perform, for example, encoding / decoding, modulation / demodulation, and a multiplexing / demultiplexing, and performs layer (e.g. L1, medium access control (the MAC), Radio Link Control (RLC) and packet data convergence protocol ( the PDCP)) in various types of signal processing. Instead of the controller 2321, BB processor 2326 may have the above-described part or all of the logic functions. BB processor 2326 may be a memory storing a communication control program, or is configured to execute a program comprising a processor module and associated circuitry. Update to the BB processor 2326 functional changes. The module 2320 may be inserted into the card slot of the base station apparatus or blade. Alternatively, the module may be a chip on a card or blade is mounted. Meanwhile, RF circuitry 2327 may include, for example, mixers, filters and amplifiers, and to transmit and receive wireless signals via the antenna 2310.
[0156]
11, wireless communication interface 2325 may include a plurality of processors 2326 BB. For example, a plurality of BB processor 2326 may be compatible with a plurality of frequency bands used by eNB 2300. 11, wireless communication interface 2325 may include a plurality of RF circuits 2327. For example, a plurality of RF circuitry 2327 may be compatible with a plurality of antenna elements. Although FIG. 11 shows a state where a wireless communication interface 2325 comprises a plurality of RF circuits 2326 and 2327 processors BB plurality example, the wireless communication interface 2325 may also include a single processor BB 2326 or 2327 single RF circuit.
[0157]
ENB 2300 in FIG. 11, referring to FIGS. 1 and 2 illustrate the function of the units may be at least a portion of the 2321 by the controller. For example, the controller 2321 may perform at least part of the functions 1 and 2 described with reference to FIG respective units by executing a program stored in the memory 2322 is.
[0158]
On the face of the present invention, description of specific embodiments, the description is directed to an embodiment and / or illustrated features may be used in one or more other embodiments, the same or similar way, features of the other embodiments in combination with, or instead of the features of other embodiments.
[0159]
It should be emphasized that the term "comprises / comprising" specify the presence of features, elements, steps or components used in herein, but does not preclude the presence or addition of one or more other features, elements, steps or components.
[0160]
In the above-described embodiments and examples, the use of the reference numerals of digits to represent the various steps and / or units. Those of ordinary skill in the art should be understood that these reference numerals merely for convenience of description and drawing, and does not represent the order or any other defined.
[0161]
Further, the method of the present invention is not limited to be performed in chronological order described in the specification, may be, performed in parallel or independently in accordance with another time-sequentially. Thus, the order of the method described in the specification above should not be construed as limiting the scope of the invention.
[0162]
Although above the invention has been disclosed by the description of specific embodiments of the present invention, it should be understood that all of the above embodiments and examples are illustrative rather than limiting. One skilled in the art may be devised within the spirit and scope of the appended claims various modifications of the invention, modifications and equivalents. Such modifications, improvements or equivalents should also be considered as included within the scope of the present invention.

WE CLAIM

[Claim 1] A wireless communication device for a base station side, comprising: one or more processors configured to obtain the distribution of user equipment; determining a channel state information reference signal CSI- to be used based on the distribution of the user equipment RS mechanism; generating indication information, the indication information for CSI-RS mechanism indicating to the user equipment to be used; and the mechanism according to the CSI-RS, CSI-RS controls the transmission to the user equipment.
[Claim 2]
The wireless communication apparatus according to claim 1, wherein said mechanism for determining the CSI-RS CSI-RS comprises selecting one of beamforming and non-precoded CSI-RS.
[Claim 3]
The wireless communication apparatus according to claim 2, wherein, obtaining the distribution of the user equipment comprising: estimating the distribution of the user equipment based on the directional information derived from the uplink signal of the user equipment.
[Claim 4]
The wireless communication apparatus according to claim 3, wherein the uplink signal comprises a sounding reference signal, the angle of the arrival directional information comprises sounding reference signal.
[Claim 5]
The wireless communication apparatus according to claim 2, wherein the distribution density indicates the user, the selection comprising: in a case where the user density is higher than a predetermined level, selecting the non-precoded CSI-RS, user density lower than a case where a predetermined level, selecting beamforming CSI-RS.
[Claim 6]
The wireless communication apparatus according to claim 5, wherein said predetermined level and spatial beamforming the CSI-RS is related to the resolution.
[Claim 7]
The wireless communication apparatus according to claim 3, wherein said selecting comprises: sub-regions according to the distribution of user equipments in the cell of the base station in, respectively, select the appropriate mechanisms CSI-RS for each subregion.
[Claim 8]
The wireless communication apparatus according to claim 7, wherein said selecting comprises: for the sub-region of the user density is higher than a predetermined level, select non-precoded CSI-RS; density below a predetermined level for a user of said sub- region, selecting beamforming CSI-RS.
[Claim 9]
The wireless communication apparatus according to claim 2, wherein the processor is further configured to: control the channel state information CSI report from the user equipment to receive and / or resolution, wherein for beamforming CSI-RS, the CSI includes a channel quality indicator report comprising the rank indication and without precoding matrix indicator for the non-precoded CSI-RS, the CSI comprises reporting channel quality indicator, at least one of the rank indication and the precoding matrix indicator.
[Claim 10]
The wireless communication apparatus according to claim 2, wherein the processor is further configured to: the indication information is included in the radio resource control signaling.
[Claim 11]
The wireless communication apparatus according to claim 2, wherein the processor is further configured to: respectively provided corresponding CSI-RS resource for a subset of beamforming CSI-RS and non-precoded CSI-RS.
[Claim 12]
The wireless communication apparatus according to claim 11, wherein a respective CSI-RS resource subset comprises: a subset of CSI-RS resource for the beamforming CSI-RS is provided for setting the non-precoded and a CSI-RS CSI-RS resource subsets arranged orthogonal to each other.
[Claim 13]
The wireless communication apparatus according to claim 11, wherein a respective CSI-RS resource subset comprising: the number of beamforming using CSI-RS user equipment to the number of ports provided for beamforming a CSI-RS.
[Claim 14]
The wireless communication apparatus according to claim 13, wherein the processor is further configured to: generate a device for indicating the number of ports to a user respective information CSI-RS mechanism.
[Claim 15]
The wireless communication apparatus according to claim 11, wherein a respective CSI-RS resource subset comprising: from the smallest port number of the CSI-RS resource from a first set of ports assigned to beamforming and non-CSI-RS one precoded CSI-RS, the maximum port number from the CSI-RS resource from a second set of ports assigned to another beam-forming CSI-RS and non-precoded in the CSI-RS.
[Claim 16]
The wireless communication apparatus according to claim 15, wherein the processor is further configured to: CSI-RS to be employed in the mechanism corresponds to a case where the second group of ports, for generating an indication from the user equipment since max_port_number CSI-RS resource selection signaling port.
[Claim 17]
The wireless communication apparatus according to claim 11, wherein a respective CSI-RS resource subset comprising: a respective port CSI-RS dispensing mechanism according to one of a plurality of predetermined manner, and the processor is further configured of: generating a predetermined manner of the indication information to a user equipment indicating the adopted.
[Claim 18]
A radio communication method for a base station side, comprising: obtaining the distribution of user equipment; determining a channel state information reference signal CSI-RS mechanism to be used based on the distribution of the user equipment; generating indication information, the indication information CSI-RS for a user equipment indicating the mechanism to be used; and the mechanism according to the CSI-RS, CSI-RS controls the transmission to the user equipment.
[Claim 19]
An apparatus for wireless communication device user equipment side, comprising: one or more processors, configured to provide directional information transmits an uplink signal to the base station control; analytical indication information from a base station, the indication information to a channel state information reference signal CSI-RS mechanisms employed; and CSI-RS mechanism according indicated, CSI-RS measurement control from the base station.
[Claim 20]
The wireless communication apparatus according to claim 19, wherein the CSI-RS mechanism selected beamforming CSI-RS and non-precoded CSI-RS.
[Claim 21]
The wireless communication apparatus according to claim 20, wherein the uplink signal comprises a sounding reference signal.
[Claim 22]
The wireless communication apparatus according to claim 20, wherein the processor is further configured to: The CSI-RS mechanism indicated, based on measurements of CSI-RS from the base station to generate channel state information CSI report , wherein for beamforming CSI-RS, the CSI comprises a channel quality indication report comprising the rank indication and without precoding matrix indicator.
[Claim 23]
The wireless communication apparatus according to claim 22, wherein the processor is further configured to: control the transmission of the CSI report to the base station, wherein the mechanism according to the CSI-RS indicated, report the CSI-RS resource subsets the CSI.
[Claim 24]
The wireless communication apparatus according to claim 23, wherein the CSI-RS resource for the subset and a subset of resources for non-CSI-RS CSI-RS provided precoded beamformed CSI-RS is provided disposed orthogonal to each other .
[Claim 25]
The wireless communication apparatus according to claim 24, wherein the processor is further configured to: for a number of CSI-RS resources corresponding to CSI-RS port mechanism based on the instruction information from the base station, determining the CSI-RS ports corresponding CSI-RS mechanism assigned to the user equipment.
[Claim 26]
The wireless communication apparatus according to claim 25, wherein determining the CSI-RS port comprises: determining the CSI-RS port from the first set of ports from the smallest port number of the CSI-RS resource; or in response to specific signaling from the base station, determines the CSI-RS port from the second set of ports from the maximum port number CSI-RS resource.
[Claim 27]
The wireless communication apparatus according to claim 24, wherein the processor is further configured to: based on information indicating one of a plurality of predetermined manner from a base station, the user equipment is determined according to a predetermined distribution manner indicated CSI-RS mechanism corresponding to the CSI-RS ports.
[Claim 28]
Wireless communication method for a user equipment side, comprising: transmitting a control signal to provide directional information of the uplink to the base station; parsed indication information from a base station, indicating the channel state information reference signal information indicating a CSI-RS mechanism to be used ; and CSI-RS mechanism according indicated, CSI-RS measurement control from the base station.