Mechanism to support RRM measurement in new radio access system with beamforming
Apparatus and methods are provided to for RRM measurement in the new radio (NR) access system. In one novel aspect, multiple transmission (TX) beams are measured by a user equipment (UE) with multiple receiving (RX) beams, stores the measured TX-RX pair in a measurement matrix, and calculates a consolidation measurement for each cell based on a consolidation rule. In one embodiment, the consolidation rule indicates generating a RX consolidated vector by consolidating all RX beams with the same TX beam ID, and subsequently, generating the consolidation measurement for the cell based on the RX consolidated vector. In another embodiment, the measurement matrix is layer-3 filtered and consolidated. In yet another embodiment, the UE sends a measurement report, either contains the consolidated measurement or the measurement vector, to the NR network based on the consolidation measurement. In one embodiment, the network performs consolidation on the received measurement vector.
1. A method comprising:
measuring multiple transmission (TX) beams by a user equipment (UE) in a new radio (NR) system with multiple cells, wherein each cell of the NR system has multiple TX beams, and wherein the UE has multiple receiving (RX) beams for each TX beam;
storing measurement results for all TX-RX pairs of each corresponding cell in a measurement matrix for the corresponding cell indexed by corresponding TX beam identification (ID) and RX beam ID;
calculating a consolidation measurement for each cell from one or more qualified TX-RX pairs for each corresponding cell based on a consolidation rule;
generating a measurement report based the consolidated measurement result; and
sending the measurement report to the NR network.
2. The method of claim 1 , wherein the consolidation rule indicates generating a RX consolidated vector for a cell by consolidating all RX beams of the cell with the same TX beam ID, and subsequently, generating the consolidation measurement for the cell based on the RX consolidated vector for the cell.
3. The method of claim 1 , wherein the consolidation rule is selected from a set of matrix consolidation rules comprising: selecting the measurement result of a TX-RX pair with the best RSRP, a number of TX-RX pairs with corresponding measurement result above a threshold, a mean value of the measurement results for all TX-RX pairs or all the TX-RX pairs above a threshold for corresponding cell, a sum value of the measurement results for all TX-RX pairs for corresponding cell or all the TX-RX pairs above a threshold.
4. The method of claim 1 , wherein calculating the consolidation measurement for each cell involves:
performing a layer-3 filter on each TX-RX pair of corresponding cell measurement matrix and generating filtered measurement matrix; and
subsequently, performing a consolidation on the filtered measurement matrix by applying separate consolidation and generating a consolidated vector.
5. The method of claim 1 , wherein calculating the consolidation measurement for each cell involves:
performing a layer-3 filter on each TX-RX pair of corresponding cell measurement matrix and generating filtered measurement matrix; and
subsequently performing a consolidation on the filtered measurement matrix by applying joint consolidation and generating the consolidation measurement.
6. The method of claim 1 , wherein calculating the consolidation measurement for each cell involves:
performing a consolidation on the measurement matrix for TX-RX pairs of corresponding cell and generating a consolidated vector indexed by TX IDs; and
subsequently, performing a layer-3 filter on the consolidated vector and performing consolidation on the filtered vector to generate the consolidated measurement for the corresponding cell.
7. The method of claim 1 , wherein calculating the consolidation measurement for each cell involves:
performing a consolidation on the measurement matrix for TX-RX pairs of corresponding cell and generating a consolidated vector indexed by TX IDs followed by a second consolidation to generate a consolidated value; and
subsequently, performing a layer-3 filter on the consolidated value to generate the consolidated measurement for the corresponding cell.
8. The method of claim 1 , wherein calculating the consolidation measurement for each cell involves:
performing a consolidation on the measurement matrix for TX-RX pairs of corresponding cell and generating a consolidated value; and
subsequently, performing a layer-3 filter on the consolidated value to generate the consolidated measurement for the corresponding cell.
9. The method of claim 1 , wherein the measurement report includes the consolidated result.
10. The method of claim 1 , wherein the measurement report includes a measurement vector indexed by TX IDs, wherein each element of the measurement vector is a consolidated result of all TX-RX pairs with the same TX IDs.
11. The method of claim 10 , further comprising: receiving a consolidated measurement result for one or more cells from the network, wherein the received consolidated measurement result for each cell is derived by the network based on the measurement vector sent by the UE.
12. An user equipment (UE), comprising:
a transceiver that transmits and receives new radio (NR) signals from multiple NR cells in a NR system, wherein each NR cell has multiple transmission (TX) beams;
a multiple beam receiver that receives each TX beam with multiple receiving (RX) beamforming;
a beam measurement handler that measures multiple TX beams with multiple RX beams;
a measurement storage manager that stores measurement results for all TX-RX pairs of each corresponding cell in a measurement matrix for the corresponding cell indexed by corresponding TX beam identification (ID) and RX beam ID;
a measurement calculator that calculates a consolidation measurement for each cell from one or more qualified TX-RX pairs for each corresponding cell based on a consolidation rule; and
a measurement reporter that generates a measurement report based the consolidated measurement result and sends the measurement report to the NR network.
13. The UE of claim 12 , wherein the consolidation rule indicates generating a RX consolidated vector for a cell by consolidating all RX beams of the cell with the same TX beam ID, and subsequently, generating the consolidation measurement for the cell based on the RX consolidated vector for the cell.
14. The UE of claim 12 , wherein the consolidation rule is selected from a set of matrix consolidation rules comprising: selecting the measurement result of a TX-RX pair with the best RSRP, a number of TX-RX pairs with corresponding measurement result above a threshold, a mean value of the measurement results for all TX-RX pairs or all the TX-RX pairs above a threshold for corresponding cell, a sum value of the measurement results for all TX-RX pairs or all the TX-RX pairs above a threshold for corresponding cell.
15. The UE of claim 12 , wherein calculating the consolidation measurement for each cell involves:
performing a layer-3 filter on each TX-RX pair of corresponding cell measurement matrix and generating filtered measurement matrix; and
subsequently, performing a consolidation on the filtered measurement matrix by applying separate consolidation and generating a consolidated vector.
16. The UE of claim 12 , wherein calculating the consolidation measurement for each cell involves:
performing a layer-3 filter on each TX-RX pair of corresponding cell measurement matrix and generating filtered measurement matrix; and
subsequently, performing a consolidation on the filtered measurement matrix by applying joint consolidation and generating the consolidation measurement.
17. The UE of claim 12 , wherein calculating the consolidation measurement for each cell involves:
performing a consolidation on the measurement matrix for TX-RX pairs of corresponding cell and generating a consolidated vector indexed by TX IDs; and
subsequently, performing a layer-3 filter on the consolidated vector and performing consolidation on the filtered vector to generate the consolidated measurement for the corresponding cell.
18. The UE of claim 12 , wherein calculating the consolidation measurement for each cell involves:
performing a consolidation on the measurement matrix for TX-RX pairs of corresponding cell and generating a consolidated vector indexed by TX IDs followed by a second consolidation to generate a consolidated value; and
subsequently, performing a layer-3 filter on the consolidated value to generate the consolidated measurement for the corresponding cell.
19. The UE of claim 18 , wherein calculating the consolidation measurement for each cell involves:
performing a consolidation on the measurement matrix for TX-RX pairs of corresponding cell and generating a consolidated value; and
subsequently, performing a layer-3 filter on the consolidated value to generate the consolidated measurement for the corresponding cell.
20. The UE of claim 12 , wherein the measurement report includes the consolidated result.
21. The UE of claim 12 , wherein the measurement report includes a measurement vector indexed by TX IDs, wherein each element of the measurement vector is a consolidated result of all TX-RX pairs with the same TX IDs.
22. The UE of claim 21 , further comprising: a network measurement receiver that receives a consolidated measurement result for one or more cells from the network, wherein the received consolidated measurement result for each cell is derived by the network based on the measurement vector sent by the UE.