JP6152619B2 - Wireless communication method and wireless communication apparatus for setting measurement resource - Google Patents

Description

  The present disclosure relates to a wireless communication method and a wireless communication apparatus that set measurement resources.

  In LTE-A (Long Term Evolution-Advanced) Release 11, in order to derive at least a channel quality indicator (CQI), a measurement resource (MR) is measured for each user equipment (UE). ) Was agreed to set. The UE can report multiple CQIs. For each CQI, the signal portion and the interference portion are each measured based on different MRs. MR is a Release 10 Channel State Information Reference Signal (CSI-RS) to reduce specification effort and maintain backward compatibility. The MR for signal measurement is non-zero power (NZP) CSI-RS, and the MR for interference measurement is zero power CSI-RS.

  Note that UE complexity increases with the number of MRs configured. Since the UE needs to prepare a possible aperiodic CSI request, it must measure all configured MRs even when some MRs do not support any configured CSI reports . Therefore, it is advisable to apply some constraints on MR configuration to limit UE processing requirements.

  The point where UE complexity is most concerned is how many MRs can be processed in one subframe. As a result, the constraint is to limit / specify the maximum number of MRs that can be measured within one subframe.

  However, in practice, it may be difficult for the network (NW) to avoid setting a certain number of MRs in one subframe for the UE. In particular, when the NW likes flexible CoMP (Coordinated Multi-Point) operation, it is necessary to set MR corresponding to various CoMP operations in the CoMP operation. Thus, the actual configured MR may be greater than the maximum number of MRs that can be measured by the UE, which is referred to herein as MR collision. MR collisions cannot be avoided by careful MR assignment in some cases. For example, when joint transmission (JT) is supported between three cells (macro / pico / pico), it is not possible to avoid three MRs in one subframe. FIG. 1 shows an example of MR collision. In FIG. 1, the maximum number of MRs that a UE can measure in one subframe is only 2, whereas the number of MRs (MR1, MR2, and MR3) actually set in several subframes. Is 3. Thus, MR collisions occur within several subframes surrounded by the ellipse of FIG.

  One solution to solve the above problem that the actually configured MR is greater than the maximum number of MRs that the UE can measure is to ignore (not measure) all MRs in the subframe. However, this will result in inaccurate CQI and consequently reduce system throughput. The preferred UE behavior is to ignore only excess MR. The UE can calculate the CQI associated with the ignored MR based on the past MR. Another alternative is to report an “out-of-range” CQI in this case and not calculate the CQI. However, this alternative is not preferred because past MRs may still be useful.

  Which MRs are ignored is left to the UE implementation and may not be specified. However, in this case, the eNB (eNode B) does not know which CQI is calculated based on the past MR. In other words, the eNB does not have information about which CQIs are in the past and can make incorrect scheduling decisions. Therefore, it is preferable to specify and / or set which MR is ignored on the UE side.

  The simplest method to ignore is based on priority. That is, MRs with low priority are ignored. The priority may be signaled explicitly from the eNB or may be set implicitly based on the order of MR configuration. However, in this case, the MR with the lowest priority is always ignored. If a collision occurs in all subframes including the MR with the lowest priority, the CQI associated with the lowest priority is completely in error. This is highly undesirable. FIG. 2 shows an example of ignoring based on priority. In this example, three MRs are set, MR1 has the highest priority (most important), MR2 has medium priority (second most important), and MR3 has the lowest priority (Least important). Since MR3 has the lowest priority, it has been shown that it is always ignored within a subframe where there is a collision. Therefore, the CQI associated with MR3 is completely wrong and is not allowed.

  In view of the above, this disclosure is made to avoid always ignoring the same MR based on the simplest possible specifications and / or signaling.

  In one aspect of the present disclosure, a wireless communication method for configuring a measurement resource (MR) is provided, wherein the number of MRs configured in one subframe is a maximum number of MRs that a UE can measure in one subframe. If it exceeds the number, it decides which MR to ignore and decides that the MR with the lower priority is ignored, and MR is not ignored A times within the duration of N subframes, where A is 1 It is a larger integer, N corresponds to (1 + B * MR period), and B is an integer of 1 or more.

  In another aspect of the present disclosure, a wireless communication method for configuring a measurement resource (MR) is provided, wherein the number of MRs configured in one subframe is a number of MRs that a UE can measure in one subframe. If the maximum number is exceeded, it decides which MRs to ignore and decides that MRs with lower priority are ignored, and the MR priority increases according to the previous ignore of MR.

  In a further aspect of the present disclosure, a wireless communication method for configuring a measurement resource (MR) is provided, wherein the number of MRs configured in one subframe is a maximum number of MRs that a UE can measure in one subframe. If the number is exceeded, determine which MRs to ignore, determine that MRs with lower priority are to be ignored, and if channel state information (CSI) reporting is triggered aperiodically, CSI When the MR associated with is between the aperiodic trigger and the associated uplink (UL) CSI reporting, the priority of the MR associated with CSI is increased to be higher than other MRs.

  In a further aspect of the present disclosure, a wireless communication method for configuring a measurement resource (MR) is provided, wherein the number of MRs configured in one subframe is a maximum number of MRs that a UE can measure in one subframe. If the number exceeds, determine which MR to ignore and each configured MR is ignored one or more times in a round robin fashion, and MR with lower priority is more than MR with higher priority Ignored.

  In a further aspect of the present disclosure, a wireless communication device for setting a measurement resource (MR) is provided, where the number of MRs configured in one subframe is a maximum number of MRs that a UE can measure in one subframe. If it exceeds the number, it is determined that an MR having a lower priority is determined to be ignored, and MR having a lower priority is determined to be ignored, and MR is not ignored A times within a period of N subframes, where , A is an integer greater than 1, N corresponds to (1 + B * MR period), and B is an integer greater than or equal to 1.

  In a further aspect of the present disclosure, a wireless communication device for setting a measurement resource (MR) is provided, where the number of MRs configured in one subframe is a maximum number of MRs that a UE can measure in one subframe. If the number is exceeded, an ignorance decision unit for deciding which MR to ignore is provided, and it is determined that the MR having the lower priority is ignored, and the MR priority is increased according to the previous ignore of the MR.

  In a further aspect of the present disclosure, a wireless communication device for setting a measurement resource (MR) is provided, where the number of MRs configured in one subframe is a maximum number of MRs that a UE can measure in one subframe. An ignorance determination unit that determines MRs to be ignored if the number exceeds, an ignorance determination unit that determines that MRs having lower priorities are ignored, and aperiodically triggered channel state information ( The priority of MRs associated with CSI reports should be higher than other MRs when the MR associated with CSI is between the aperiodic trigger and the associated uplink (UL) CSI report. And a priority increasing unit for increasing.

  In a further aspect of the present disclosure, a wireless communication device for setting a measurement resource (MR) is provided, where the number of MRs configured in one subframe is a maximum number of MRs that a UE can measure in one subframe. If the number exceeds, an ignorance determination unit that determines an MR to be ignored is provided, and each set MR is ignored one or more times in a round robin manner, and an MR having a lower priority has a higher priority. Ignored more than MR with a degree.

  The foregoing and other features of the present disclosure will become more fully apparent from the following description and appended claims, taken in conjunction with the accompanying drawings. With the understanding that these drawings only illustrate some embodiments according to the present disclosure and are therefore not considered to limit its scope, the present disclosure will further increase specificity and use through the use of the accompanying drawings. Described with details.

The figure which shows the example of MR collision roughly Diagram showing the purely priority-based ignore solution problem The figure which shows schematically the exemplary flowchart of the method of ignoring MR by Embodiment 1 The figure which shows schematically the example of the method of disregarding MR by Embodiment 1 The figure which shows schematically another example of the method of ignoring MR by Embodiment 1 The figure which shows schematically another example of the method of ignoring MR by Embodiment 1 The figure which shows schematically another example of the method of ignoring MR by Embodiment 1 The figure which shows schematically the example which distinguishes SMR and IMR by Embodiment 1 (distinguish) 1 is a block diagram schematically showing a wireless communication apparatus 900 according to a first embodiment The flowchart which shows the method of ignoring MR by Embodiment 2 The figure which shows schematically the example of the method of ignoring MR with priority adjustment by Embodiment 2 The flowchart which shows the method of ignoring MR by Embodiment 3 The figure which shows schematically the example of the method of ignoring MR with the adjustment of priority by Embodiment 3 The figure which shows schematically the example of the method of ignoring MR by the round robin system by Embodiment 4. The figure which shows schematically the example of the method of ignoring MR based on the combination of round robin and priority by Embodiment 4

  In the following detailed description, reference is made to the accompanying drawings, which form a part hereof. In the drawings, similar symbols typically identify similar components, unless context dictates otherwise. It is readily understood that aspects of the present disclosure can be arranged, substituted, combined, and designed in a variety of different configurations, all of which are explicitly contemplated and form part of the present disclosure. I will.

(Embodiment 1)
Embodiment 1 of the present disclosure provides a wireless communication method for setting a measurement resource (MR), in which the number of MRs set in one subframe can be measured by the UE in one subframe. Is determined to be ignored, MRs with lower priority are determined to be ignored, and MR is not ignored A times within the duration of N subframes, where A Is an integer greater than 1, N corresponds to (1 + B * MR period), and B is an integer greater than or equal to 1. A and B are set by the eNB or specified as fixed values. A larger A and a smaller B means more neglect of the associated MR.

  FIG. 3 shows a flowchart of an exemplary implementation of the MR ignoring method (ie, the wireless communication method for setting MR) according to the first embodiment. In step 301, the MR having the lowest priority is selected as a candidate to be ignored (first candidate). In step 302, if the candidate selected in step 301 is ignored this time, it is determined whether or not it is ignored A times within N subframes. If the candidate is ignored this time and is not ignored A times within N subframes (No), the process proceeds to step 303. In step 303, it is determined that the candidate is ignored. If the candidate is ignored this time and is ignored A times within N subframes (yes), the process returns to step 301 where, in step 301, the lowest priority other than the first candidate in the MR. An MR having a degree is selected as a candidate to be ignored (second candidate). A similar process is performed for the second candidate as well as for the first candidate. When there are two or more MRs that need to be ignored, that is, the number of MRs set in one subframe is two or more, the maximum number of MRs that can be measured by the user equipment (UE) in one subframe. If so, steps 301-303 are repeated a corresponding number of times. As described in the background art, if MR is ignored, CSI calculated using past measurement results may be reported, or CSI with invalid (out of range) flag may be reported. Is possible.

  However, it should be noted that FIG. 3 is only an example of implementing two conditions, and other step flows may be used to implement the method according to the first embodiment. For example, the determination as to whether MR is ignored A times within N subframes for the current ignore can be made before selecting the MR with the lowest priority. In other words, MRs that are ignored A times within N subframes are ruled out first, and the MR with the lowest priority among the remaining MRs is determined to be ignored.

  In the following, some examples for parameters A and B will be described in detail. The parameters A and B may be set by the eNB and may be specified as fixed values.

  FIG. 4 shows an example of A = 2 and B = 1 according to the first embodiment of the present disclosure. As shown in FIG. 4, three MRs having priorities in the order of MR1, MR2, and MR3 are set. The UE can measure only two MRs within one subframe. Therefore, one MR in each collision subframe should be ignored. In this example, MR1 and MR2 have a period of 5 ms (ie, 5 subframes), and MR3 has a period of 10 ms (ie, 10 subframes). Therefore, N = (1 + B * 5) = 6 for MR1 and MR2, and N = (1 + B * 10) = 11 for MR3. In accordance with the constraints of the first embodiment, MR1 and MR2 should not be ignored twice within 6 subframes, and MR3 should not be ignored twice within 11 subframes. For the first collision subframe (the leftmost subframe in FIG. 4), MR3 with the lowest priority will be considered a candidate to ignore. Since MR3 is ignored first, it satisfies the condition that MR3 is not ignored twice within 11 subframes. Therefore, MR3 is ignored in this subframe. Then, for the second collision subframe where MR3 appears for the second time, if MR3 is similarly ignored, MR3 will be ignored twice within 11 subframes (inclusively, the first collision subframe). Counted from frame to second collision subframe). This does not satisfy the condition that MR3 should not be ignored twice within 11 subframes. Therefore, MR3 has the lowest priority but is not determined to be ignored in the second collision subframe. At this point, only M1 and M2 are considered to be ignored. M2 has lower priority and is not ignored twice within 6 subframes. Thus, it is determined that M2 is ignored in the second collision subframe. With a similar determination method, M3 and M2 are ignored in the third and fourth collision subframes, respectively. From the above description, it can be seen that, based on a simple specification description, MR having higher importance is less ignored and MR having the lowest importance (MR3 in this example) is not always ignored. However, A is not limited to 2, B is not limited to 1, Rather, A is any integer greater than 1 (for example, 2, 3, 4,...), And B is any integer greater than or equal to 1 ( Note that, for example, 1, 2, 3, 4. Further, the number of MRs to be set is not limited to three, and the number of MRs that a UE can measure in one subframe is not limited to two. Rather, the present disclosure may be applied to any configuration related to them.

  FIG. 5 shows another example of A = 2 and B = 1, where four MRs with priorities in the order MR1, MR2, MR3, and MR4 are set. The UE can measure only two MRs within one subframe. Therefore, one MR should be ignored in some collision subframes and two MRs should be ignored in some other collision subframes. In this example, MR1 and MR2 have a period of 5 ms (ie, 5 subframes), MR3 has a period of 10 ms (ie, 10 subframes), and MR4 has a period of 20 ms (ie, 20 subframes). Subframe). Therefore, for MR1 and MR2, N = (1 + B * 5) = 6, for MR3, N = (1 + B * 10) = 11, and for MR4, N = (1 + B * 20) = 21. According to the constraints of the first embodiment, MR1 and MR2 should not be ignored twice within 6 subframes, MR3 should not be ignored twice within 11 subframes, and MR4 should be 21 subframes Should not be ignored twice within. There are four MRs for the first collision subframe (the leftmost subframe in FIG. 5). Therefore, two MRs should be selected so that they are ignored. MR3 and MR4 with lower priority will be initially considered as candidates to ignore. Since MR3 and MR4 are initially ignored, it is satisfied that MR3 is not ignored twice in 11 subframes and MR4 is not ignored twice in 21 subframes. Therefore, MR3 and MR4 are ignored in this subframe. And there are only three MRs (MR1, MR2, and MR3) for the second collision subframe in which MR3 appears the second time. Therefore, only one MR should be ignored. Here, if MR3 is similarly ignored, MR3 will be ignored twice within 11 subframes (inclusively counted from the first collision subframe to the second collision subframe) . This does not satisfy the condition that MR3 should not be ignored twice within 11 subframes. Therefore, MR3 has the lowest priority but is not determined to be ignored in the second collision subframe. At this point, only M1 and M2 are considered to be ignored. Since M2 has lower priority and is not ignored twice in 6 subframes, it is determined that M2 is ignored in the second collision subframe. There are four MRs for the third collision subframe in which MR3 appears for the third time. Therefore, two MRs should be ignored. Here, MR4 has the lowest priority, but if MR4 is ignored in this subframe, it will be ignored twice in 21 subframes. Therefore, MR4 is not ignored in this subframe, and MR2 and MR3 are ignored in this subframe. The reason is that MR2 and MR3 have a lower priority than MR1 and are not ignored twice in 6 and 11 subframes, respectively. Based on a similar determination method, MR2 is ignored in the third collision subframe and MR3 and MR4 are ignored in the fourth collision subframe. By the above method of ignoring MR, within 40 ms (40 subframes), MR1 is ignored zero times (0%), MR2 is ignored three times (37.5% of the total number of MR2) and MR3 is twice Ignored (50% of the total number of MR3) and MR4 is ignored once (50% of the total number of MR4). MRs with high importance are neglected and it is derived that not all MRs are always ignored.

Furthermore, different values of A and B can be set for different MRs in order to ignore more less important MRs. FIG. 6 shows that A = 3 and B = 2 for the least important MR (MR3 in FIG. 6), and A = 2 and B = 1 for the other MRs (MR1 and MR2 in FIG. 6). An example is shown. Also, three MRs are set, and the UE can measure two MRs in one subframe. As shown in FIG. 6, the restriction according to the first embodiment from MR1 to MR3 is that MR3 is not ignored three times within 21 (21 = 1 + 2 ^* 10) subframes, and MR1 and MR2 are 6 (6 = 1 + 5). ) It is not ignored twice in a subframe. Therefore, based on the same determination method as in FIG. 4, MR3 is determined to be ignored for the first, second, and fourth collision subframes of FIG. The reason is that MR3 is not ignored three times within 21 subframes of these subframes and has the lowest priority. MR2 is determined to be ignored in the third collision subframe. The reason is that if MR3 having a lower priority than MR2 is ignored in this collision subframe, it will be ignored three times in 21 subframes. According to the configuration of FIG. 6, the less important MR3 is ignored more than the configuration of FIG.

FIG. 7 shows that A = 3 and B = 2 for the least important MR (MR4 in FIG. 7) and A = 2, B for the other MRs (MR1, MR2, and MR3 in FIG. 7). An example in which = 1 is shown. Also, four MRs are set, and the UE can measure two MRs in one subframe. As shown in FIG. 7, the constraint according to the first embodiment from MR1 to MR4 is that MR4 is not ignored three times within 41 (41 = 1 + 2 ^* 20) subframes, and MR1 and MR2 are 6 (6 = 1 + 5). ) It is not ignored twice in a subframe, and MR3 is not ignored twice in an 11 (11 = 1 + 10) subframe. Therefore, based on the same determination method as in FIG. 5, both MR3 and MR4 are determined to be ignored for the first and third collision subframes, and both MR2 and MR3 are ignored for the fifth collision subframe. And only MR2 is determined to be ignored for the second and fourth collision subframes. With the configuration of FIG. 7, within 60 ms (60 subframes), MR1 is ignored zero times (0%), MR2 is ignored four times (33% of the total number of MR2), and MR3 is ignored three times (MR3 MR4 is ignored twice (66% of the total number of MR4). It is clear that MR4, which is less important, is more ignored than the configuration of FIG.

  Further, it may be advantageous to distinguish between signal measurement resources (SMR) and interference measurement resources (IMR). For example, in practice, SMR may be more important than IMR. Thus, the eNB implementation can assign a higher priority to the SMR. Alternatively, the MR priority can be fixed in the specification. For example, the SMR can be set to have a higher priority than the IMR. FIG. 8 shows an example of distinguishing between SMR and IMR. In this example, MR1 and MR3 are IMR and MR2 is SMR. For this reason, MR2 has a higher priority than MR1 and MR3. Further, the eNB sets MR3 to have a lower priority than MR1. Based on the same determination method as in FIG. 4, MR2 is an SMR, so it is difficult to ignore (in this case, it is not ignored at all). Note that the SMR can also be set to have a lower priority than the IMR. Furthermore, the concept of distinguishing between SMR and IMR can be applied to other embodiments.

  FIG. 9 is a block diagram showing a wireless communication apparatus 900 according to the first embodiment of the present disclosure. The wireless communication device can be a UE or an eNB. The radio communication apparatus 900 includes an MR ignoring determination unit 901 that determines an MR to be ignored when the number of MRs set in one subframe exceeds the maximum number of MRs that can be measured by the UE in one subframe. Here, it is determined that the MR having the lower priority is ignored. MR is not ignored A times within a period of N subframes. A is an integer greater than 1, N corresponds to (1 + B * period of MR in units of subframes), and B is an integer of 1 or more.

  A wireless communication device 900 according to the present disclosure processes various data of each component in the wireless communication device 900, and executes a CPU (Central Processing Unit) 910 for executing a related program for controlling the operation of each component. ROM (Read Only Memory) 913 for storing various programs required for executing various processes and controls by the CPU 910, and intermediate data temporarily generated in the process and control procedures by the CPU 910 are stored. A random access memory (RAM) 915 and / or a storage unit 917 for storing various programs, data, and the like. The MR ignore determination unit 901, the CPU 910, the ROM 913, the RAM 915, and / or the storage unit 917 can be interconnected via a data and / or command bus 920, and transfer signals between each other. Can do.

  Each component described above does not limit the scope of the present disclosure. The function of the MR ignore determination unit 901 can be implemented as a separate component, and can also be implemented by functional software in combination with the CPU 910, the ROM 913, the RAM 915, and / or the storage unit 917.

(Embodiment 2)
Embodiment 2 of the present disclosure provides a radio communication method for setting the measurement resource (MR) illustrated in FIG. 10, in which the number of MRs set in one subframe is determined by the UE in one subframe. If the maximum number of MRs that can be measured is exceeded, determine which MRs to ignore and determine that MRs with lower priority are ignored, and the MR priority is increased according to the previous ignore of MR (1001 ).

  In order to avoid always ignoring the least important MR, the second embodiment provides a method of adjusting the priority based on ignorance. The eNB sets each MR having an initial priority. Although it is determined that the MR with the lowest priority is ignored, the priority of the MR in the current subframe is increased according to the ignore of the MR in the previous subframe. FIG. 11 shows an example of adjusting the priority based on ignorance. As shown in FIG. 11, initially, MR1 has the highest priority, MR3 has the lowest priority, and MR2 has a medium priority. MR3 is ignored in the first collision subframe because it has the lowest priority. After this ignorance, the priority of MR3 is increased by a certain value (which can be set by the eNB) for subsequent subframes. In the second collision subframe, MR3's priority increases according to MR3's initial disregard, but is still lower than MR2 (in other cases, MR3's priority can be increased to be higher than MR2). Therefore, MR3 is also ignored. The priority of MR3 is then increased again for subsequent subframes. Thus, in the third collision subframe, the priority of MR3 is actually increased to be higher than MR2 according to neglect in both the first collision subframe and the second collision subframe. Therefore, MR2 is ignored because it has the lowest priority at this point. According to the method according to the second embodiment having the priority adjustment, not all MRs are always ignored. Furthermore, in order to avoid the MR priority from increasing without limit, the eNB can set an effective window. The effective window is a time window and is defined such that only previous ignores within the effective window are considered to increase the priority of MR in the current subframe. For example, when the effective window for MR3 is set as 20 ms (20 subframes) and the MR of subframe n (current subframe) is considered, the period of subframes (n-20) to (n-1) (valid Only the neglect of MR in the window) is considered to increase the MR priority of subframe n. In this way, only recent ignores are considered, avoiding increasing the MR priority.

  As in the first embodiment, the radio communication apparatus according to the second embodiment can be configured, and the radio communication apparatus measures the number of MRs set in one subframe by the UE in one subframe. If the maximum number of MRs that can be exceeded is exceeded, an ignorance decision unit that decides which MRs to ignore, it is decided that MRs with lower priority are ignored, and the MR priority increases according to the previous ignorance of MR 9 except that the ignore determination unit 901 is replaced by the ignore determination unit.

(Embodiment 3)
In order to avoid ignoring MRs associated with important CSI reports, for example, if a CSI report is triggered aperiodically, the associated MR may be associated with an uplink ( UL) may not be ignored when in between CSI reports. In view of this, the third embodiment of the present disclosure provides a radio communication method for setting the measurement resource (MR) illustrated in FIG. 12, in which the number of MRs set in one subframe is UE Decides which MRs to ignore, MRs with lower priorities are ignored (1201), and channel state information (CSI) reporting is not When triggered periodically, when the MR associated with CSI is between an aperiodic trigger and the associated uplink (UL) CSI report, the priority of the MR associated with CSI is given priority over other MRs. Increase to increase (1202).

  FIG. 13 shows an example of MR between an aperiodic trigger and an associated UL CSI report. As shown in FIG. 13, MR2, MR3, and MR4 are related to CSI reporting. Accordingly, the priority of MR2, MR3, and MR4 is increased to be higher than MR1 between the aperiodic trigger and the associated UL CSI report. Therefore, MR1 is ignored in the collision subframe because it has the lowest priority at this point. This avoids ignoring MRs associated with important CSI reports. It should be noted that the concept of increasing the MR priority associated with the aperiodic trigger for CSI reporting can also be applied to the first and second embodiments.

  Further, similarly to the first embodiment, the radio communication apparatus according to the third embodiment can be configured. In the radio communication apparatus, the number of MRs set in one subframe is determined by the UE in one subframe. An ignorance determination unit for determining an MR to be ignored when the maximum number of MRs that can be measured in the case is exceeded, wherein an MR having a lower priority is determined to be ignored, and an aperiodic trigger The priority of MRs associated with channel state information (CSI) reports to be transmitted over other MRs when the MR associated with CSI is between an aperiodic trigger and the associated uplink (UL) CSI report. It can have the same configuration as FIG. 9 except that the ignorance determining unit 901 is replaced with a priority increasing unit that increases the priority level.

(Embodiment 4)
In order to avoid always ignoring the least important MR, Embodiment 4 of the present disclosure provides a wireless communication method for setting a measurement resource (MR), and the method is set within one subframe. If the number of MRs to be exceeded exceeds the maximum number of MRs that the UE can measure in one subframe, determine which MRs to ignore and each configured MR is ignored one or more times in a round robin manner MRs with lower priorities are ignored over MRs with higher priorities.

  Initially, the UE ignores different MRs in a basic round robin manner in different collision subframes. That is, each set MR is ignored once in one cycle in a round robin manner. FIG. 14 shows an example of an ignoring method based on the basic round robin method. In this example, MR3, MR2, and MR1 circulate one after another and are ignored. Specifically, MR3 is ignored in the first collision subframe, MR2 is ignored in the second collision subframe, and MR1 is ignored in the third collision subframe.

  As an improvement to the basic round robin scheme, it is possible to use a combination of round robin and priority. In other words, each configured MR is ignored one or more times in a round robin manner, and MRs with lower priority are ignored over MRs with higher priority in each cycle. FIG. 15 shows an example of an ignoring method based on combination and round robin. In this example, MR3 has the lowest priority, so it is set to be ignored twice in each cycle, and MR1 and MR2 are set to be ignored only once in each cycle. Specifically, MR3 is ignored twice in the first and second collision subframes, MR2 is ignored once in the third collision subframe, and MR1 is ignored once in the fourth collision subframe. The After this cycle, the same pattern will be repeated for the next cycle. Due to the combination of round robin and priority, no MR is always ignored, and less important MRs are more ignored.

  Further, similarly to the first embodiment, the radio communication apparatus according to the fourth embodiment can be configured. In the radio communication apparatus, the number of MRs set in one subframe is determined by the UE in one subframe. In the case of exceeding the maximum number of MRs that can be measured in (1), an ignoring determination unit that determines MRs to be ignored, and each set MR is ignored one or more times in a round robin manner, and has a lower priority. The configuration is the same as that shown in FIG. 9 except that the ignorance determination unit 901 is replaced by an ignorance determination unit in which the MR having the higher priority is ignored more than the MR having the higher priority.

  The present invention can be realized by software, hardware, or software linked with hardware. Each functional block used in the description of each embodiment described above can be realized by an LSI as an integrated circuit. The functional blocks can be formed individually as chips, or a single chip that includes some or all of the functional blocks can be formed. In this specification, an LSI can be referred to as an IC, a system LSI, a super LSI, or an ultra LSI depending on the degree of integration. However, the technique for mounting an integrated circuit is not limited to an LSI, and can be realized by using a dedicated circuit or a general-purpose processor. Further, an FPGA (Field Programmable Gate Array) that can be programmed after the manufacture of the LSI, or a reconfigurable processor that can reconfigure the connection and setting of circuit cells arranged in the LSI can be used. it can. Furthermore, the calculation of each functional block can be performed by using a calculation means including, for example, a DSP or a CPU, and the processing steps of each function can be recorded on a recording medium as a program for execution. Furthermore, if a technique for mounting an integrated circuit that replaces an LSI emerges as a result of advances in semiconductor technology or other derivative technologies, it is apparent that functional blocks can be integrated using such technology.

  It is intended that the present invention be variously changed or modified by those skilled in the art based on the description presented herein and the known techniques without departing from the content and scope of the present invention. Note that and the application falls within the scope of the claims as protected. Furthermore, the constituent elements of the above-described embodiments can be arbitrarily combined without departing from the scope of the present invention.

Claims (12)

A wireless communication method executed by a wireless communication device that sets a measurement resource,
If the number of measurement resources set in one subframe exceeds the maximum number of measurement resources that the user equipment can measure in one subframe, determine measurement resources to be ignored;
Determining not to update CSI (channel state information) corresponding to the ignored measurement resource;
In determining the measurement resource to ignore, it is determined that the measurement resource having a lower priority is ignored.
Wireless communication method. The measurement resource is not ignored A times within a period of N subframes, where A is an integer greater than 1, N corresponds to (1 + B * period of the measurement resource), and B is 1 or more An integer,
The wireless communication method according to claim 1. A is equal to 2 and B is equal to 1.
The wireless communication method according to claim 2. For the measurement resource with the lowest priority, A is equal to 3, B is equal to 2,
For other measurement resources, A is equal to 2 and B is equal to 1.
The wireless communication method according to claim 2. The signal measurement resource is configured to have a higher priority than the interference measurement resource,
The wireless communication method according to claim 1. If the reporting of channel state information is triggered aperiodically,
When the measurement resource associated with the channel state information is between the aperiodic trigger and a report of the associated uplink channel state information, the priority of the measurement resource associated with the channel state information is set to Increase to be higher than the measurement resource of
The wireless communication method according to claim 1. A wireless communication device for setting a measurement resource,
A determination unit configured to determine a measurement resource to be ignored when the number of measurement resources set in one subframe exceeds the maximum number of measurement resources that can be measured by the user equipment in one subframe;
The determining unit determines not to update CSI (channel state information) corresponding to the ignored measurement resource;
Determining in the determination of the measurement resource to ignore that the measurement resource having a lower priority is ignored;
Wireless communication device. The measurement resource is not ignored A times within a period of N subframes, where A is an integer greater than 1, N corresponds to a period of (1 + B * the measurement resource), and B is 1 or more An integer,
The wireless communication apparatus according to claim 7. A is equal to 2 and B is equal to 1.
The wireless communication apparatus according to claim 8. For the measurement resource with the lowest priority, A is equal to 3, B is equal to 2,
For other measurement resources, A is equal to 2 and B is equal to 1.
The wireless communication apparatus according to claim 8. The signal measurement resource is configured to have a higher priority than the interference measurement resource,
The wireless communication apparatus according to claim 7. If the reporting of channel state information is triggered aperiodically,
When the measurement resource associated with the channel state information is between the aperiodic trigger and a report of the associated uplink channel state information, the priority of the measurement resource associated with the channel state information is set to Increase to be higher than the measurement resource of
The radio | wireless communication apparatus of any one of Claims 7-11.

Images