WO2012013114A1

WO2012013114A1 - Method and apparatus for providing coordinated multi-point (comp) measurement set information

Info

Publication number: WO2012013114A1
Application number: PCT/CN2011/076977
Authority: WO
Inventors: 郭森宝; 孙云锋; 朱常青; 张晨晨; 魏民
Original assignee: 中兴通讯股份有限公司
Priority date: 2010-07-29
Filing date: 2011-07-08
Publication date: 2012-02-02
Also published as: CN102348233B; CN102348233A

Abstract

A method and an apparatus for forwarding coordinated multi-point (CoMP) measurement set information are disclosed by the present invention, which can both determine a CoMP measurement set that a user equipment (UE) needs to feed back, and send a measurement set indication to the UE according to the determined CoMP measurement set. The method and apparatus in the present invention can successfully inform the UE of the measurement set that is used to feed back the channel information of multiple CoMP cells.

Description

COMP measurement set notification method and device

The present invention relates to the field of communications, and in particular, to a multipoint coordination (COMP) measurement set notification method and apparatus. Background technique

In the Long Term Evolution advanced system (LTE-Advanced or LTE-A), in order to improve the average spectrum utilization of the cell and the spectrum utilization of the cell edge, COMP technology and multi-antenna enhancement technology are adopted. The COMP technology is divided into cooperative beamforming (CB) and joint transmission (JT) technologies, which can greatly improve the average spectral efficiency of the cell and the quality of service of the cell edge users. In particular, the JT technology can largely guarantee the quality of the channel with poor quality of the edge cell. In the COMP technology, whether the coordinated scheduling (CS)/CB or JT needs to feed back the channel information of multiple COMP cells; however, the user equipment (UE) can only know the physical ID of the serving cell, but cannot know more about feedback. The information of the channel information of the COMP cells, and thus the channel information of the COMP cell cannot be effectively fed back. Summary of the invention

In view of this, the main object of the present invention is to provide a COMP measurement set notification method and apparatus for successfully notifying a UE for feeding back a measurement set of channel information of a plurality of COMP cells.

In order to achieve the above object, the technical solution of the present invention is achieved as follows:

A multi-point collaborative measurement set notification method, the method comprising:

Determining a multi-point coordinated measurement set that the user equipment UE needs to feed, and sending a measurement set indication to the UE according to the determined multi-point cooperative measurement set.

The process of determining the measurement set includes: Select a measurement set in the list of adjacent cells; or,

Select a measurement set in the same frequency pre-cell list; or,

The measurement set is selected in a cell in which the UE lastly feeds back the reference signal received power or the cell in which the 8 reference signals receive the strongest power.

The method for sending the measurement set indication is:

Sending a measurement set indication by using the high layer signaling; the indication manner includes: a radioResourceConfigCommon force in the system information block SIB2 into the new information element IE item, or an antennalnfoCommon of the radioResourceConfigCommon in SIB2 enters a new IE item, or Adding a new IE item to the radio resource control information; sending the measurement set indication by using the foregoing IE item; or sending a measurement set indication by using a physical downlink control channel or a cyclic redundancy risk bit of the physical downlink shared channel; The bit bitmap bitmap scrambles the cyclic redundancy check CRC bit of the downlink control information in the physical downlink control channel or the CRC bit of the physical downlink shared channel of the physical downlink shared channel, and the UE obtains the measurement set indication by verifying the CRC. information.

When the measurement set indication is sent, the manner for indicating the measurement set is: using a bitmap to indicate a cell that needs feedback channel information; where each bit in the bitmap represents the neighbor cell list or the same frequency pre-cell list or Reporting each cell in the cell list, 0 in the bitmap indicates that the cell list or the intra-frequency cell list or the cell in the report cell list is not set as the measurement set cell, and 1 indicates that the cell in the list is set to be measured. Collecting cells, or vice versa; or,

Defining a cell that needs feedback channel information by using an index number list; wherein the index number indicates a location index of the measurement set cell in the neighbor cell list or the same frequency pre-cell list or the report cell list; or

Determining a cell that needs feedback channel information by using a physical ID list of a cell in the D, the area list, or the intra-frequency list, the area list, or the report cell list, where the physical ID list is a neighbor cell list or A subset of the same frequency list, a list of cells, or a list of reported cells.

Wherein, the method further comprises:

The UE detects channel information of the corresponding coordinated multi-point cell according to the received measurement set indication, and feeds back the detected cell channel information.

A multipoint coordinated measurement set notification device, the device comprising a measurement set selection unit and a measurement set notification unit; wherein

The measurement set selection unit is configured to determine a multi-point coordinated measurement set that the UE needs to feed back, and notify the measured set notification unit to the determined measurement set;

The measurement set notification unit is configured to send a measurement set indication to the UE according to the received measurement set.

Wherein, when determining the measurement set, the measurement set selection unit is used to:

Select a measurement set in the list of adjacent cells; or,

Select a measurement set in the same frequency pre-cell list; or,

In the process of sending the measurement set indication, when the manner of measuring the set is indicated, the measurement set notification unit is configured to:

Using a bitmap to indicate a cell that needs to feed back channel information; where each bit in the bitmap represents the neighboring cell list or the same-frequency neighboring cell list or each cell in the reporting cell list, where 0 in the bitmap indicates the neighboring cell list or the same The cell in the frequency-of-frequency cell list or the report cell list is not set as the measurement set cell, and 1 indicates that the cell in the list is set as the measurement set cell, or vice versa; or

Defining a cell that needs to feed back channel information by using an index number list; wherein the index number indicates a location index of the measurement set cell in the adjacent cell list or the same frequency pre-cell list or the report cell list; or The cell that needs feedback channel information is indicated by the physical ID list of the cell in the D, the area list, or the intra-frequency list, the area list, or the report cell list, where the physical ID list is a neighboring cell list or the same frequency. Or report a subset of the cell list.

Wherein, when the measurement set indication is sent, the measurement set notification unit is configured to:

The measurement set indication is sent by using the high-level signaling; the indication manner includes: inserting a new IE item in the radioResourceConfigCommon in the SIB2, or entering a new IE item in the antennalnfoCommon of the radioResourceConfigCommon in the SIB2, or in the radio resource control information Adding a new IE item; sending the measurement set indication by using the foregoing IE item; or sending a measurement set indication by using a physical downlink control channel or a cyclic redundancy risk bit of the physical downlink shared channel; the indication manner includes using a bitmap bitmap bit pair The CRC bit of the downlink control information in the physical downlink control channel or the CRC bit of the physical downlink shared channel of the physical downlink shared channel is scrambled, and the UE obtains the measurement set indication information by verifying the CRC.

The UE is further used to:

And detecting channel information of the corresponding multi-point coordinated cell according to the received measurement set indication, and feeding back the detected cell channel information.

The COMP measurement set notification method and apparatus of the present invention can successfully notify the UE of a measurement set for feeding back multiple COMP cell channel information. DRAWINGS

1 is a flow chart of a COMP measurement set notification according to an embodiment of the present invention;

2 is a schematic diagram of a COMP measurement set notification process according to the present invention;

FIG. 3 is a diagram of a COMP measurement set notification apparatus according to an embodiment of the present invention. detailed description

In general, information can be added to the high-level signaling for semi-static notification of the UE's measurement set. And, the CRC bits of the physical downlink control channel (PDCCH) are scrambled with the relevant information of the measurement set, thereby dynamically notifying the UE of the measurement set. Specifically, since the UE wants to feed back channel information of all cells in the COMP measurement set, the base station (eNB) needs to notify the UE of the range of the COMP measurement set.

Since there is a semi-statically configured primary cell list in both the eNB and the UE, the eNB may consider selecting a measurement set in the list of neighboring cells. In LTE R8/R9, the maximum number of adjacent cells in the allowed per-cell list is 32, and the high-level signaling indication may be used to notify the UE of the cell information in the cell list to be fed back. The method may be placed in a radio resource control (RRC) message, and the method may be a bit bitmap or direct feedback of index numbers corresponding to multiple cells. Since the primary cell list has 1-32 cells, each index number corresponds to the physical ID of only one cell, so the UE only needs to know the index number to know the physical ID of the corresponding cell. The bitmap mode usually also corresponds to the index number. The total 32-bit sequence is 0. No feedback is required, and 1 means feedback is required. Of course, the reverse is also true. In addition, the physical ID of the cell in each measurement set can also be directly fed back.

Furthermore, since there is a semi-statically configured intra-frequency periodic cell list in both the eNB and the UE, the eNB may also consider selecting a measurement set in the same-frequency pre-cell list. In the LTE R8/R9, the maximum number of the same-frequency Pro-cells in the same-frequency Pro-cell list is 16, and the high-level signaling indication can be used to notify the UE of the channel information of the cells in the Pro-cell list to be fed back. The foregoing high-level signaling may be transmitted in the radio resource control information, and the transmission method may be divided into a bitmap method, or directly feedback multiple index numbers corresponding to the same frequency and d area. Because the intra-frequency neighbor cell list has 1-16 cells, each index number corresponds to the physical ID of a unique cell, so the UE only needs to know the index number to know the physical ID of the corresponding cell. The bitmap mode usually also corresponds to the index number. For a total of 16-bit sequences, 0 means no feedback is required, and 1 means feedback is required; of course, vice versa. In addition, the physical ID of the cell in each measurement set can also be directly fed back. In addition, since the reference signal received power (RSRP) measurement feedback report of the UE allows feedback of up to 8 cells, it is also considered to select a measurement set in the 8 cells or the 8 strongest RSRP cells that the UE has recently fed back to the RSRP. The above-mentioned high-frequency signaling may be used to notify the UE of the cell information in the cell list, and the high-level signaling may be transmitted in the radio resource control information. The method of transmission may also be a bitmap mode, an index feedback, or a direct feedback of a cell physical ID. At this time, the number of bits of the feedback bitmap is only 8 bits, 0 means no feedback is required, and 1 means feedback is required; of course, the reverse is also true.

In an actual application, the cell channel information that the UE needs to feed back may be implicitly notified by using the measurement set information to scramble the control information such as the downlink control information (DCI). For example: When selecting a measurement set from a neighboring cell, since the bitmap has 32 bits, 16 bits of each segment after two segments can be used to scramble the CRC bits of the DCI. When the measurement set is selected from the same-frequency neighbor cell list, since the bitmap has 16 bits, it can be directly used to scramble the CRC of the DCI. When the measurement set is selected from the 8 cells that have been recently fed back, the 8-bit information of the bitmap may be repeated to generate 16-bit information for scrambling the CRC bits of the DCI.

After receiving the measurement set indication, the UE may perform feedback of multiple cell channel information one by one in a certain order. For example, the order of the bitmaps (or vice versa), or the order of the indexes from large to small (or small to large), or the order of the physical IDs from large to small (or from small to large). Or the eNB and the UE use a fixed feedback sequence for feedback; or adjust the feedback order of each cell by means of dynamic indication, semi-static indication, and the like. After the UE learns the feedback sequence, the channel information of each cell can be fed back in the next one or several subframes in order.

It can be seen that the above operation ideas can be represented as shown in FIG. 1. Referring to FIG. 1, FIG. 1 is a flow chart of a COMP measurement set notification according to an embodiment of the present invention, where the process includes the following steps:

Step 101: Determine a multi-point collaborative measurement set that the UE needs to feed back.

Specifically, the source of the measurement set may be a neighbor cell list, a same-frequency neighbor cell list, or RSRP measurement feedback report.

Step 102: In the case that the measurement set is determined, it is determined that the measurement set indication needs to be sent to the UE.

Specifically, there may be multiple ways to send a measurement set indication, such as: sending through high-level signaling, or sending content other than high-level signaling. When the measurement set indication is sent through the high layer signaling, the process proceeds to step 103; when the measurement set indication is sent through the content other than the higher layer signaling, the process proceeds to step 104.

Step 103: Send a measurement set indication to the UE by using high layer signaling.

Specifically, the measurement set indication may be sent to the UE by using the bitmap mode, the index number list mode, or the physical ID list mode by using the high layer signaling. Then, the process proceeds to step 105.

Step 104: Send a measurement set indication to the UE by means other than high layer signaling, such as scrambling the cyclic redundancy check of the control information of the downlink control channel.

Step 105: The UE detects channel information of the corresponding multi-point coordinated cell according to the received measurement set indication, and feeds back the detected cell channel information.

The above-described processes may be embodied in various specific embodiments. The present invention will be described below by way of specific embodiments.

Embodiment 1:

Suppose a list of neighboring cells with 32 cells is shown in Table 1: Cable 0 ID: ID 1 ID: ID ID ID ID ID ID ID ID ID ID ID ID ID ID ID ID ID ID ID ID ID ID ID ID ID ID ID ID ID ID ID ID ID ID ID ID ID ID ID ID ID ID ID ID ID ID ID ID ID ID ID ID ID ID ID ID ID ID ID ID ID ID ID ID ID ID ID ID ID ID ID ID ID ID ID ID area 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16

ID

Cable 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 Small ID ID ID ID ID ID ID ID ID ID ID ID ID Area 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32

ID

Table 1

ID1 to ID32 range from 0 to 504, indicating the physics of each cell, and 1 ≤ < ≤ 32. Since the eNB notifies the UE of possible possible cell list configuration changes through high-level signaling every time, the eNB and the UE store the same neighbor cell list for a period of time, and the eNB may consider selecting the measurement set in the neighbor cell list. The above high layer signaling may be placed in the radio resource control information for transmission. The method of transmission may be a bitmap method. As shown in the list of neighboring cells, each of the neighboring cell lists includes IDs of 32 cells arranged in a certain order, so it is possible to indicate measurement by adding certain information in CQI-ReportConfig. The cell within the set.

The above CQI-ReportConfig is an IE item in the radio resource control information. In fact, it is also possible to add certain information in the other content of the radio resource control information to indicate the cell in the measurement set. The following only describes CQI-ReportConfig as an example.

The way to use bitmap can be:

The channel information of the specific cells in the neighboring cell list can be known by the 32-bit bit string described above. The cell value of the cell that needs feedback is 0 or 1, and the opposite is not needed. It can be known from the above-mentioned bit string corresponding to the cell list that the channel information of the second, 8, 10, 12, 14, 16 cells in the cell list needs to be fed back (the bitmap value corresponding to 1 when the feedback is required) under). After receiving the measurement set indication, the UE can learn the physical ID of the cell through the neighbor cell list, and further know the CSI-RS pattern of different measurement cells by combining the system frame number and the CSI-RS pattern indication message. Therefore, channel measurement is performed on a plurality of cells, and then feedback of a plurality of cell channel information can be performed one by one in a certain order. For example, the order may be in the order of bitma (or vice versa), or the eNB and the UE may perform feedback in a fixed feedback order. Or adjust the feedback order of each cell by dynamic indication and semi-static indication. After the UE learns the feedback sequence, it can feed back the channel information of each cell in the next one or several subframes.

Embodiment 2:

Assume that a list of co-frequency temporary cells with 16 cells is shown in Table 2:

Table 2

ID1 to ID16 range from 0 to 504, indicating the physics of each cell, and 1≤ < ≤16. The eNB and the UE store the same intra-frequency neighbor cell list for a period of time, and the eNB can consider the same-frequency pre-frequency list. The measurement set is selected in the cell list, and the above high layer signaling may be placed in the radio resource control information for transmission. The method of transmission may be a bitmap method. As shown in the list of neighboring cells, each of the intra-frequency neighboring cell lists includes IDs of 16 cells arranged in a certain order, so it is possible to add certain information in CQI-ReportConfig. To indicate the cell in the measurement set, the bitmap method can be:

From the 16-bit bit string described above, it can be known which channel information of the d-regions in the same-frequency adjacent cell list are specifically fed back. The cell value of the cell that needs feedback is 0 or 1, and the opposite is not needed. It can be known from the above bit string corresponding to the same-frequency Pro-cell list that the channel information of the 2, 8, 10, 12, 14, 16 cells in the same-frequency Pro-cell list needs to be fed back (the bitmap value corresponding to the feedback request) In the case of 1). After receiving the measurement set indication, the UE can learn the physical ID of the cell through the same-frequency pre-cell list, and further combine the system frame number and the CSI-RS map. The signal indicating the CSI-RS of different measurement cells can be obtained by the message such as the indication, so that channel measurement is performed on multiple cells, and then feedback of channel information of multiple cells can be performed one by one in a certain order. For example, the order of the bitmaps (or vice versa) may be used, or the eNB and the UE may perform feedback in a fixed feedback order, or adjust the feedback order of each cell by using dynamic indication and semi-static indication. After the UE learns the feedback sequence, it can feed back the channel information of each cell in the next one or several subframes.

Embodiment 3:

Assume that the list of 8 cells that have received the most recent feedback or the strongest RSRP is shown in Table 3:

table 3

ID1 to ID8 range from 0 to 504, indicating the physics of each cell, and ≠H^, l≤ < ≤8. The eNB and the UE store the same neighbor cell list in a period of time, and the UE reports the periodic or non-period reporting multiple times. The RSRP of the cell and the corresponding list of cell IDs. The eNB and the UE store the same list of feedback RSRP cells for a period of time. The eNB may consider selecting a measurement set in the recently reported RSRP cell list or the strongest RSRP cell list, and the above high layer signaling may be placed in the radio resource control information for transmission. The method of transmission may be a bitmap method. As shown in the list of neighboring cells, each of the neighboring cell lists includes IDs of 8 cells arranged in a certain order, so it is possible to indicate measurement by adding certain information in CQI-ReportConfig. The cell in the set can be bitmapped by: The channel information of the cells in the specific report cell list can be known from the above 8-bit bit string. The cell value of the cell that needs feedback is 0 or 1, and the cell bitmap value that does not need feedback is the opposite. It can be known from the above-mentioned bit string corresponding report cell list that it is necessary to feed back the channel information of the 2nd, 4th, and 6th cells in the cell list (in the case where the bitmap value corresponding to the feedback request is 1). After receiving the measurement set indication, the UE can learn the physical ID of the cell through the report list, and further can learn the CSI-RS pattern of different measurement cells by combining the message such as the system frame number, thereby performing channel on multiple cells. Measurement, and then feedback of multiple cell channel information can be performed one by one in a certain order. For example, the order of the bitmaps (or vice versa) may be used, or the eNB and the UE may perform feedback in a fixed feedback order, or adjust the feedback order of each cell by using dynamic indication and semi-static indication. After the UE learns the feedback sequence, it can feed back the channel information of each cell in the next one or several subframes.

Embodiment 4:

Since the eNB notifies the UE of possible possible cell list configuration changes through high-level signaling every time, the eNB and the UE store the same neighbor cell list for a period of time, and the eNB may consider selecting the measurement set in the neighbor cell list. The above high layer signaling may be placed in the radio resource control information for transmission. The method of transmitting may be a method for notifying the index. As shown in the list of neighboring cells, each of the neighboring cell lists includes IDs of 32 cells arranged in a certain order, so it is possible to indicate by adding certain information in CQI-ReportConfig. The cells in the set are measured, and the index information indicates which channel information in the cell list is specifically fed back. If the index value is {2, 8, 10, 12, 14, 16}, it can be known that the channel information of the 2, 8, 10, 12, 14, 16 cells in the neighbor cell list needs to be fed back, and the UE receives the channel information. After measuring the set indication, the physical ID of the cells can be obtained through the list of the neighboring cells, and the CSI-RS pattern of the different measurement cells can be known by combining the message such as the system frame number, thereby performing channel measurement on multiple cells, and then It is possible to perform feedback of a plurality of cell channel information one by one in a certain order. For example, in the order of the index (or vice versa), or the eNB and the UE adopt a fixed feedback sequence. Feedback is performed, or the feedback order of each cell is adjusted by dynamic indication and semi-static indication.

After the UE learns the feedback sequence, it can feed back the channel information of each cell in the next one or several subframes.

Embodiment 5:

The eNB and the UE store the same intra-frequency neighbor cell list for a period of time, and the eNB can consider the same-frequency pre-frequency list. The measurement set is selected in the cell list, and the above high layer signaling may be placed in the radio resource control information for transmission. The method of transmission may be a method for notifying the index. As shown in the list of the frequency-of-frequency cells, each of the intra-frequency neighboring cell lists includes the IDs of 16 cells arranged in a certain order, so that certain information can be added in the CQI-ReportConfig. It is used to indicate the cells in the measurement set, and the index information can be used to learn the specific channel information of the cells in the same frequency. If the index value is {2, 8, 10, 12, 14, 16}, it can be known that the channel information of the 2nd, 8th, 10th, 12th, and 14th cells in the same-frequency cell list needs to be fed back. After receiving the measurement set indication, the physical IDs of the cells can be obtained through the same-frequency pre-cell list, and the CSI-RS patterns of different measurement cells can be learned by combining the system frame number and the like, thereby performing on multiple cells. Channel measurement, and then feedback of multiple cell channel information can be performed one by one in a certain order. For example, the order of the index list may be used (or vice versa), or the eNB and the UE may perform feedback in a fixed feedback order, or adjust the feedback order of each cell by dynamic indication and semi-static indication. After the UE learns the feedback sequence, it can feed back the channel information of each cell in the next one or several subframes.

Example 6:

The eNB may add a certain information in the CQI-ReportConfig to indicate the cell in the measurement set, and may directly indicate the physical ID of the cell under measurement in the CQI-ReportConfig. After receiving the measurement set indication, the UE further combines the system frame number. The CSI-RS pattern indication and other messages can be used to learn the CSI-RS patterns of different measurement cells, thereby performing channel on multiple cells. Measurement, and then feedback of multiple cell channel information can be performed one by one in a certain order. For example, the order of the physical ID list may be used (or vice versa), or the eNB and the UE may perform feedback in a fixed feedback order, or adjust the feedback order of each cell by using dynamic indication and semi-static indication. After the UE learns the feedback sequence, it can feed back the channel information of each cell in the next one or several subframes.

Example 7:

Assume that the list of 8 cells of the most recent feedback or strongest RSRP is as shown in Table 3 above. The eNB and the UE store the same neighbor cell list in a period of time, and the UE reports the periodic or non-period reporting multiple times. The RSRP of the cell and the corresponding list of cell IDs. The eNB and the UE store the same feedback RSRP cell list (which may be simply referred to as a report list) for a period of time. The eNB may consider selecting a measurement set in the recently reported RSRP cell list or the strongest RSRP cell list, and the above high layer signaling may be placed in the radio resource control information for transmission. The method of transmitting may be a method of feedback indexing, as shown in the report cell list, each of the neighboring cell lists includes IDs of 8 cells arranged in a certain order, so it is possible to indicate by adding certain information in the CQI-ReportConfig. The cell in the set is measured, and the index of the cell that needs to be fed back is {2, 4, 6}. It can be known from the above report cell list that the channel information of the 2nd, 4th, and 6th cells in the report list needs to be fed back. After receiving the measurement set indication, the UE can learn the physical ID of the cell through the report list, and further know the CSI-RS pattern of different measurement cells by combining the message such as the system frame number, thereby performing channel on multiple cells. Measurement, and then feedback of multiple cell channel information can be performed one by one in a certain order. For example, the order of the index numbers (or vice versa) may be used, or the eNB and the UE may perform feedback in a fixed feedback order, or adjust the feedback order of each cell by using dynamic indication and semi-static indication. After the UE learns the feedback sequence, it can feed back the channel information of each cell in the next one or several subframes. Example 8:

Assume that the list of 32 cells that were last reported is as shown in Table 1 above.

Since the eNB notifies the UE of possible possible cell list configuration changes through high-level signaling every time, the eNB and the UE store the same neighbor cell list for a period of time, and the eNB may consider selecting the measurement set in the neighbor cell list. The above high layer signaling may be placed in the radio resource control information for transmission. The method of transmission may be a bitmap method. As shown in the list of neighboring cells, each of the neighboring cell lists includes IDs of 32 cells arranged in a certain order, so the cells in the measurement set may be indicated by the bit string of the bitmap. The way of bitmap can be:

From the 32-bit bit string described above, it is possible to know the channel information of which cells in the specific cell list are specifically fed back. The bitmap value of the cell that needs feedback is 0 or 1, and the opposite is not needed. It can be known from the above-mentioned bit string corresponding to the cell list that the channel information of the second, 8, 10, 12, 14, 16 cells in the cell list needs to be fed back (the bitmap value corresponding to 1 when the feedback is required) under). After receiving the measurement set indication, the UE can learn the physical IDs of the cells through the list of the neighboring cells, and further can learn the CSI-RS patterns of different measurement cells by combining the message such as the system frame number, thereby performing the calculation on multiple cells. Channel measurement, and then feedback of multiple cell channel information can be performed one by one in a certain order. For example, the order of the bitmaps may be reversed (or vice versa), or the eNB and the UE may perform feedback in a fixed feedback order, or the feedback order of each cell may be adjusted by dynamic indication and semi-static indication. After the UE learns the feedback sequence, it can feed back the channel information of each cell in the next one or several subframes.

It should be noted that, in this embodiment, the indication information of the bitmap is not transmitted in the high layer signaling, but is obtained by scrambling the CRC bit of the DCI. After receiving the DCI, the UE first performs blind detection by using a combination of the first 16 bits of the 32-bit bimap sequence and the RNTI of the UE, and if the blind check is correct, the corresponding combination of the bitmap sequence and the RNTI is selected; then, the next downlink is performed. The combination of the last 16 bits of the blind check bitmap sequence and the RNTI of the UE in the frame, and when the blind check is correct The first 16 and the last 16 bits are combined as a 32-bit sequence to decide which channel information needs to be fed back according to the completed sequence of bitmaps.

In practical applications, the eNB may perform the XOR operation of the first 16 bits and the last 16 bits of the bitma sequence, and additionally add lbit in the DCI to indicate the cause of the XOR operation result. At this time, the increased DCI content is only lbit, and the determination of the coordinated multi-point cell can be limited to one subframe.

Of course, it is also conceivable to apply the above-mentioned scrambling operation mode to the scrambling of the CRC bits of the PDSCH, such as: at this time, the length of the CRC bits is 24, and the remaining 8 bits can be used to scramble the selected 24 bits, Only 4 bits of 4 bits, 24 bits are added, and 8 bits can be repeated several times (2 times or 3 times) to scramble the 24-bit data. The following is only described by taking the CRC scrambling of the DCI as an example.

Example 9:

The eNB and the UE store the same intra-frequency neighbor cell list for a period of time, and the eNB can consider the same-frequency pre-frequency list. The measurement set is selected in the cell list, and the above high layer signaling may be placed in the radio resource control information for transmission. The method of transmission may be a bitmap method. As shown in the frequency-providing cell list, each intra-frequency pre-cell list includes IDs of 16 cells arranged in a certain order, so the bit string of the bitmap may be used to indicate the measurement set. The cell, using the bitmap method can be:

From the 16-bit bit string described above, it can be known which channel information of the d-regions in the same-frequency adjacent cell list are specifically fed back. The cell value of the cell that needs feedback is 0 or 1, and the opposite is not needed. It can be known from the above-mentioned bit string corresponding to the cell list that the channel information of the 2, 8, 10, 12, 14, 16 cells in the same-frequency cell list needs to be fed back (the bitmap value corresponding to the feedback request is 1). in the case of). After receiving the measurement set indication, the UE can learn the physical ID of the cell through the same-frequency pre-cell list, and further know the difference by combining the system frame number and the like. The CSI-RS pattern of the cell is measured, thereby performing channel measurement on a plurality of cells, and then feedback of a plurality of cell channel information can be performed one by one in a certain order. For example, the order of the bitmaps (or vice versa) may be used, or the eNB and the UE may perform feedback in a fixed feedback order, or adjust the feedback order of each cell by using dynamic indication and semi-static indication. After the UE learns the feedback sequence, it can feed back the channel information of each cell in the next one or several subframes.

It should be noted that the indication information of the bitmap in this embodiment is not transmitted in the high layer signaling, but is obtained by scrambling the CRC of the DCI. After receiving the DCI, the UE performs a blind check by using a combination of a 16-bit bimap sequence and the RNTI of the UE. If the blind check is correct, the corresponding bitma sequence and the RNTI combination are selected, and the detected bitmap sequence is used to determine which cells need to be fed back. Channel information.

Of course, it is also conceivable to apply the above-mentioned scrambling operation mode to the scrambling of the CRC bit of the PDSCH, for example: at this time, the length of the CRC bit is 24, and the bit rotation of the 16-bit bitmap sequence can be repeated several times, and then The 24-bit data is scrambled.

Example 10:

Assume that the list of 8 cells of the most recent feedback or strongest RSRP is as shown in Table 3 above. The eNB and the UE store the same neighbor cell list in a period of time, and the UE reports the periodic or non-period reporting multiple times. The RSRP of the cell and the corresponding list of cell IDs. The eNB and the UE store the same list of feedback RSRP cells for a period of time. The eNB may consider selecting a measurement set in the recently reported RSRP cell list or the strongest RSRP cell list, and the above high layer signaling may be placed in the radio resource control information for transmission. The method of transmission may be a bitmap method. As shown in the list of neighboring cells, each of the neighboring cell lists includes IDs of 8 cells arranged in a certain order, so that the list of specific reporting cells can be known by the 8-bit bit string. Which of the cells in the channel information. The cell value of the cell that needs to be fed back is 0 or 1, and the cell bitmap value that does not need feedback is the opposite. Reporting the cell list by the bit string above It can be known that the channel information of the 2nd, 4th, and 6th cells in the neighboring cell list needs to be fed back (in the case where the bitmap value corresponding to the feedback request is 1). After receiving the measurement set indication, the UE can learn the physical ID of the cell through the report list, and further know the CSI-RS pattern of different measurement cells by combining the system frame number and the like, thereby performing channel on multiple cells. Measurement, and then feedback of multiple cell channel information can be performed one by one in a certain order. For example, the order of the bitmaps (or vice versa) may be used, or the eNB and the UE may perform feedback in a fixed feedback order, or adjust the feedback order of each cell by using dynamic indication and semi-static indication. After the UE learns the feedback sequence, it can feed back the channel information of each cell in the next one or several subframes.

It should be noted that, in this embodiment, the indication information of the bitmap is not placed in the high layer signaling, but is obtained by scrambling the CRC of the DCI. After receiving the DCI, the UE first repeats the 8-bit bima sequence to obtain a 16-bit sequence, and then applies a combination of the 16-bit sequence and the RNTI of the UE to perform a blind check. If the blind check is correct, the corresponding bitmap sequence and the RNTI are selected. Combine, and then decide which cell channel information needs to be fed back according to the 8-bit bitmap sequence.

Of course, it is also conceivable to apply the above-mentioned scrambling operation mode to the scrambling of the CRC bit of the PDSCH, for example, the CRC bit of the PDSCH can be scrambled, and the 8-bit bitmap needs to be repeated 3 times to 24 bits. The CRC bits are scrambled.

As can be seen from FIG. 1 and the foregoing embodiments, the overall operation of the present invention for implementing COMP measurement set notification can be represented as shown in FIG. 2 . Referring to FIG. 2, FIG. 2 is a schematic diagram of a COMP measurement set notification process according to the present invention, where the process includes the following steps:

Step 210: Determine a multi-point coordinated measurement set that the UE needs to feed back.

Step 220: Send a measurement set indication to the UE according to the determined coordinated multi-point measurement set. In order to ensure that the above technical content can be smoothly implemented, a device as shown in FIG. 3 can be provided. Referring to FIG. 3, FIG. 3 is a diagram of a COMP measurement set notification apparatus according to an embodiment of the present invention, where the apparatus includes a connected measurement set selection unit and a measurement set notification unit, and the apparatus may be configured in an eNB. And other functional entities used for communication management of the UE.

In a specific application, the measurement set selection unit can determine the multi-point coordinated measurement set that the UE needs to feed back, and notify the measurement set notification unit of the measurement set, and the measurement set notification unit sends the measurement set indication to the UE according to the received measurement set.

It should be noted that, when the measurement set selection unit determines the measurement set, the source of the measurement set may be a primary cell list, a same-frequency proximity cell list, or an RSRP measurement feedback report; and, the manner in which the measurement set notification unit sends the measurement set indication may be A variety of, such as: through high-level signaling, or through the transmission of content other than high-level signaling. When the measurement set indication is sent by using the high layer signaling, the high layer signaling may be a PDCCH or the like, and the measurement set indication may be sent to the UE by using a high layer signaling, using a bitmap mode, an index number mode, or a physical ID manner; When the content other than the content transmission measurement set indication, the measurement set indication may be transmitted to the UE by scrambling information such as the CRC of the DCI or the CRC bit of the PDSCH.

In addition, after the UE receives the measurement set indication from the measurement set notification unit, the channel information of the coordinated multi-point cell can be measured and fed back according to the measurement set indication.

In addition, there may be multiple ways to send measurement set indications through high-level signaling. For example, radioResourceConfigCommon in SIB2 adds a new IE item, and a new IE item can be added to the antennalnfoCommon of radioResourceConfigCommon in SIB2. Adding a new IE item to the RRC information, and applying the above IE item to send a measurement set indication, that is, adding a bitmap sequence list, an index list or a cell ID list of the notification measurement set to the new IE item through the DL-SCH (downlink) The shared channel is sent to the UE, and the UE obtains information about the relevant measurement set by decoding the relevant DL-SCH.

The specific operations that can be implemented by the functional entities shown in FIG. 3 have been described in detail in the foregoing flowcharts and embodiments, and are not described herein again.

In summary, the COMP measurement set notification technology of the present invention can successfully notify the UE to feed back a measurement set of channel information of multiple COMP cells, whether it is a method or a device. The above description is only for the preferred embodiment of the present invention, and is not intended to limit the scope of the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included. Within the scope of protection of the present invention.

Claims

Claim

2. The method of claim 1, wherein the determining the set of measurements comprises: selecting a set of measurements in a list of neighboring cells; or

Select a measurement set in the same frequency pre-cell list; or,

3. The method according to claim 2, wherein the method for transmitting the measurement set indication is:

4. The method according to claim 3, wherein when the measurement set indication is sent, the method for indicating the measurement set is:

Using a bitmap to indicate a cell that needs to feed back channel information; where each bit in the bitmap represents the neighboring cell list or the same-frequency neighboring cell list or each cell in the reporting cell list, where 0 in the bitmap indicates the neighboring cell list or the same Frequency zone list or report cell column The cell in the table is not set to measure the aggregate cell, and 1 indicates that the cell in the list is set as the measurement set cell, or vice versa; or

The cell that needs to feed back channel information is indicated by the physical ID list of the cell in the D, the area list, or the intra-frequency list, the area list, or the report cell list, where the physical ID list is a neighboring cell list or the same frequency. Or report a subset of the cell list.

The method according to any one of claims 1 to 4, wherein the method further comprises: the UE detecting channel information of the corresponding coordinated multi-point cell according to the received measurement set indication, and feeding back the detected cell channel information.

6. A multipoint coordinated measurement set notification device, the device comprising a measurement set selection unit and a measurement set notification unit; wherein

7. The apparatus according to claim 6, wherein, when determining a measurement set, the measurement set selection unit is configured to:

Select a measurement set in the list of adjacent cells; or,

Select a measurement set in the same frequency pre-cell list; or,

8. The apparatus according to claim 7, wherein, in the process of transmitting the measurement set indication, when indicating a manner of measuring a set, the measurement set notification unit is configured to: Using a bitmap to indicate a cell that needs to feed back channel information; where each bit in the bitmap represents the neighboring cell list or the same-frequency neighboring cell list or each cell in the reporting cell list, where 0 in the bitmap indicates the neighboring cell list or the same The cell in the frequency-of-frequency cell list or the report cell list is not set as the measurement set cell, and 1 indicates that the cell in the list is set as the measurement set cell, or vice versa; or

9. The apparatus according to claim 8, wherein, when the measurement set indication is sent, the measurement set notification unit is configured to:

The device according to any one of claims 6 to 9, wherein the UE is further configured to: detect channel information of a corresponding multi-point coordinated cell according to the received measurement set indication, and feed back the detected cell channel information. .