CLAIMS
What is claimed is:
1. Apparatus for User Equipment (UE), the apparatus comprising transceiver circuitry, and processing circuitry, the processing circuitry to:
control the transceiver circuitry to receive reference signals from a first evolved-node B (eNB) via a plurality of receive antennas of the UE, the reference signals relating to at least one antenna port of the first eNB through which corresponding reference signals were sent;
perform received signal measurement of at least a portion of the reference signals for a plurality of combinational groupings of the at least one antenna port of the eNB and the UE receive antennas to produce enhanced received signal quality (eRSQ) measurements that represent spatial characteristics of different channels corresponding to the reference signals as received by the UE; and
control the transceiver circuitry to send a report to the first eNB based on the eRSQ measurements, the report being indicative of spatial multiplexing layer availability of a corresponding channel between the UE and the first eNB.
2. The apparatus of claim 1, wherein the reference signals includes channel-state information reference signaling (CSI-RS) comprising a plurality of CSI-RS signals, each CSI-RS signal corresponding to an antenna port of the first eNB.
3. The apparatus of claim 1, wherein the eRSQ measurements represent spatial channel characteristics for a plurality of different multiple input/multiple output (MIMO) layers.
4. The apparatus of claim 1, wherein the eRSQ measurements are based on a computed aggregation of receive power measurements over a plurality of spatial channels.
5. The apparatus of claim 1, wherein the eRSQ measurements are based on a computed aggregation of ratios of receive signal power measurements and receive signal strength measurements, over a plurality of spatial channels.
6. The apparatus of claim 1, wherein the processing circuitry is further to: while the UE is connected to the first eNB, control the transceiver circuitry to receive, via the plurality of receive antennas, adjacent cell signals from a second eNB sent via at least one antenna port of the second eNB;
perform interfering received signal measurement of at least a portion of the adjacent cell signals for a plurality of UE receive antennas to produce an interference profile representing spatial characteristics of interference signals originating at the second eNB as received by the UE.
7. The apparatus of claim 6, wherein the interference profile is reported to the eNB.
8. The apparatus of claim 1, wherein the reference signaling includes non-zero-power channel state information reference signals (NZ CSI-RS).
9. The apparatus according to any one of claims 1-8, wherein the received signal measurements are stored as a Nrx x Np matrix R, wherein Nrx is the number of the receive antennas and Np is the number of antenna ports of the first eNB for each resource element (RE) of the first eNB.
10. The apparatus of claim 9, wherein the report based on the eRSRQ measurements is based on a first set of eigenvalues defined as eRSRP = eigval{E(R-RH) } , wherein eigval { } corresponds to the eigenvalue computation for a square matrix, E is an averaging function, and RH is the conjugation and transpose of matrix R.
1 1. The apparatus of claim 10, wherein the report based on the eRSRQ measurements is further based on a second set of eigenvalues defined as eRSSI= eigval{E(r- rH) } , wherein eigval{ } corresponds to the eigenvalues for a square matrix, E is an averaging function, and rH is the conjugation and transpose of vector r, wherein vector r contains the received signal measurements on all receive antennas of the UE on all resource elements.
12. The apparatus of claim 1 1 , wherein the report based on the eRSRQ measurements is further based on a ratio defined as N eRSRP/eRSSI, wherein N is the number of resource blocks, and the number of eRSRP and eRSSI values for eRSRQ calculation can be determined from the minimum of Nrx and Np.
13. A computer-readable medium containing instructions that, when executed on processing circuitry of User Equipment (UE), cause the UE to:
receive reference signals from a first evolved-node B (eNB) via a plurality of receive antennas of the UE, the reference signals relating to at least one antenna port of the first eNB through which corresponding reference signals were sent;
perform received signal measurement of at least a portion of the reference signals for a plurality of combinational groupings of the at least one antenna port of the eNB and the TJE receive antennas to produce enhanced received signal quality (eRSQ) measurements that represent spatial characteristics of different channels corresponding to the reference signals as received by the UE; and
send a report to the first eNB based on the eRSQ measurements, the report being indicative of spatial multiplexing layer availability of a corresponding channel between the UE and the first eNB.
14. The computer-readable medium of claim 13, wherein the reference signals includes channel-state information reference signals (CSI-RS).
" 15. The computer-readable medium of claim 13, wherein the plurality of the combinational groupings are eNB antenna port and UE receive antenna pairings.
16. The computer-readable medium of claim 13, wherein the instructions are further to cause the UE to:
receive configuration information from the first eNB, wherein the configuration information instructs the UE to perform the eRSQ measurements and reporting.
17. The computer-readable medium of claim 13, wherein the instructions are further to cause the UE to:
receive configuration information from the first eNB, wherein the configuration information contains an indication from which the processing circuitry is to determine a number of the antenna ports of the eNB.
18. The computer-readable medium of claim 13, wherein the report includes radio resource management (RRM) message.
19. The computer-readable medium of claim 13, wherein the eRSQ measurements are based on a computed aggregation of receive power measurements over a plurality of spatial channels.
20. The computer-readable medium of claim 13, wherein the eRSQ measurements are based on a computed aggregation of ratios of receive signal power measurements and receive signal strength measurements, over a plurality of spatial channels.
21. The computer-readable medium according to any one of claims 13-20, wherein the instructions are further to cause the UE to:
while the UE is connected to the first eNB, receive, via the plurality of receive antennas, adjacent cell signals from a second eNB sent via at least one antenna port of the second eNB;
perform interfering received signal measurement of at least a portion of the adjacent cell signals for a plurality UE receive antennas to produce an interference profile representing spatial characteristics of interference signals originating at the second eNB as received by the UE.
22. The computer-readable medium of claim 21 , wherein the interference profile is reported to the eNB.
23. The computer-readable medium of claim 13, wherein the received signal measurements are stored as a Nrx x Np matrix R, wherein Nrx is the number of the receive antennas and Np is the number of antenna ports of the first eNB for each resource element (RE) of the first eNB.
24. The computer-readable medium of claim 23, wherein the report based on the eRSRQ measurements is based on a first set of eigenvalues defined as eRSRP = eigval{ E(R- RH) } , wherein eigval{ } corresponds to the eigenvalue computation for a square matrix, E is an averaging function, and RH is the conjugation and transpose of matrix R.
25. The computer-readable medium of claim 24, wherein the report based on the eRSRQ measurements is further based on a second set of eigenvalues defined as eRSSI= eigval{ E(r- rH) }, wherein eigval{ } corresponds to the eigenvalues for a square matrix, E is an averaging function, and rH is the conjugation and transpose of vector r, wherein vector r contains the received signal measurements on all receive antennas of the UE on all resource elements.
26. The computer-readable medium of claim 25, wherein the report based on the eRSRQ measurements is further based on a ratio defined as N eRSRP/eRSSI, wherein N is the number of resource blocks, and the number of eRSRP and eRSSI values for eRSRQ calculation can be determined from the minimum of Nrx and Np.
27. Apparatus for User Equipment (UE), the apparatus comprising transceiver circuitry, and processing circuitry, the processing circuitry to:
control the transceiver circuitry to connect with a first evolved-node B (eNB) via a plurality of receive antennas of the UE;
while the UE is connected to the first eNB, control the transceiver circuitry to receive, via the plurality of receive antennas, adjacent cell signals from a second eNB;
perform interfering received signal measurement of at least a portion of the adjacent cell signals for a plurality of UE receive antennas to produce an interference profile representing spatial characteristics of interference signals originating at the second eNB as received by the UE; and
control the transceiver circuitry to send a report to the first eNB based on the interference profile.
28. The apparatus of claim 27, wherein the interference profile is represented as a computed aggregation of receive power measurements over a plurality of resource elements (REs) and orthogonal frequency division multiplexing (OFDM) symbols corresponding to individual ones of the plurality of receive antennas.
29. The apparatus according to any one of claims 27-28, wherein the interfering received signal measurement is an enhanced received signal strength indication (eRSSI) represented as a vector of dimension Nrx, wherein Nrx is a quantity of the receive antennas at the UE, the vector contains signal strength measurements corresponding to each receive antenna and aggregated over a plurality of resource blocks.
30. The apparatus of claim 27, wherein the processing circuitry is further to: control the transceiver circuitry to receive configuration information from the first eNB, wherein the configuration information instructs the UE to perform the interfering received signal measurement.