Grid of beams (GOB) adaptation in a wireless communications circuit, particularly for a wireless communications system (WCS)
Grid of beams (GoB) adaptation in a wireless communications circuit, particularly for a wireless communications system (WCS), is disclosed. The wireless communications circuit may be provided in the WCS to provide radio frequency (RF) coverage in a wireless communications cell. In this regard, an antenna array is provided in the wireless communications circuit to radiate the GoB, which includes a number of RF beams corresponding to an RF communications signal(s), in the wireless communications cell. In examples discussed herein, the wireless communications circuit can be configured to detect a coverage condition change in the wireless communications cell and modify the GoB accordingly. By adapting the GoB to the coverage condition change, it may be possible to reduce processing overhead and improve resource usage, data throughput, and system adaptability of the wireless communications circuit, thus helping to optimize RF coverage in the wireless communications cell.
1. A wireless communications system (WCS), comprising:
a plurality of remote units coupled to a plurality of communications mediums, the plurality of remote units configured to:
receive a plurality of downlink digital communications signals via the plurality of communications mediums, respectively;
convert the plurality of downlink digital communications signals into a plurality of downlink radio frequency (RF) communications signals, respectively;
distribute the plurality of downlink RF communications signals, respectively;
receive a plurality of uplink RF communications signals, respectively;
convert the plurality of uplink RF communications signals into a plurality of uplink digital communications signals, respectively; and
provide the plurality of uplink digital communications signals via the plurality of communications mediums, respectively;
wherein at least one remote unit among the plurality of remote units comprises:
an antenna array comprising a plurality of radiating elements configured to radiate a grid of beams (GoB) comprising a plurality of RF beams corresponding to an RF communications signal among the plurality of downlink RF communications signals in a wireless communications cell; and
a control circuit configured to:
receive first indication signal indicative of a short-term coverage condition change in the wireless communications cell and a second indication signal indicative of a long-term coverage condition change in the wireless communication cell; and
cause the antenna array to modify the GoB in response to the short-term coverage condition change and the long-term coverage condition change.
2. The WCS of claim 1 , wherein the control circuit is configured to cause the antenna array to modify the GoB to change a beamwidth of a selected RF beam among the plurality of RF beams.
3. The WCS of claim 2 , wherein the at least one remote unit further comprises a beamformer circuit configured to receive a plurality of beam weight sets corresponding to the plurality of RF beams, respectively, from the control circuit.
4. The WCS of claim 3 , wherein the beamformer circuit is further configured to process the RF communications signal based on each of the plurality of beam weight sets to generate a plurality of weighted RF communications signals corresponding to the plurality of radiating elements, respectively.
5. The WCS of claim 2 , wherein the at least one remote unit further comprises a signal processing circuit configured to:
determine the short-term coverage condition change in the wireless communications cell based on at least one coverage indication parameter; and
generate the first indication signal indicative of the short-term coverage condition change in the wireless communications cell.
6. The WCS of claim 1 , wherein the control circuit is configured to cause the antenna array to modify the GoB to combine at least two RF beams among the plurality of RF beams.
7. The WCS of claim 6 , wherein the at least one remote unit further comprises a beamformer circuit configured to receive a plurality of beam weight sets corresponding to the plurality of RF beams, respectively, from the control circuit.
8. The WCS of claim 7 , wherein the beamformer circuit is further configured to process the RF communications signal based on each of the plurality of beam weight sets to generate a plurality of weighted RF communications signals corresponding to the plurality of radiating elements, respectively.
9. The WCS of claim 6 , wherein the at least one remote unit further comprises a signal processing circuit configured to:
determine the short-term coverage condition change in the wireless communications cell based on at least one coverage indication parameter; and
generate the first indication signal indicative of the short-term coverage condition change in the wireless communications cell.
10. The WCS of claim 1 , wherein the control circuit is further configured to cause the antenna array to modify the GoB to eliminate a selected RF beam.
11. The WCS of claim 10 , wherein the at least one remote unit further comprises a beamformer circuit configured to receive a plurality of beam weight sets corresponding to the plurality of RF beams, respectively, from the control circuit.
12. The WCS of claim 11 , wherein the beamformer circuit is further configured to process the RF communications signal based on each of the plurality of beam weight sets to generate a plurality of weighted RF communications signals corresponding to the plurality of radiating elements, respectively.
13. The WCS of claim 10 , wherein the at least one remote unit further comprises a signal processing circuit configured to:
determine the short-term coverage condition change in the wireless communications cell based on at least one coverage indication parameter; and
generate the first indication signal indicative of the short-term coverage condition change in the wireless communications cell.
14. A wireless communications system (WCS), comprising:
a plurality of remote units coupled to a plurality of communications mediums, the plurality of remote units configured to:
receive a plurality of downlink digital communications signals via the plurality of communications mediums, respectively;
convert the plurality of downlink digital communications signals into a plurality of downlink radio frequency (RF) communications signals, respectively;
distribute the plurality of downlink RF communications signals, respectively;
receive a plurality of uplink RF communications signals, respectively;
convert the plurality of uplink RF communications signals into a plurality of uplink digital communications signals, respectively; and
provide the plurality of uplink digital communications signals via the plurality of communications mediums, respectively;
wherein at least one remote unit among the plurality of remote units comprises:
an antenna array comprising a at least one radiating element configured to radiate a grid of beams (GoB) comprising a plurality of RF beams corresponding to an RF communications signal among the plurality of downlink RF communications signals in a wireless communications cell; and
a control circuit configured to:
receive a first indication signal indicative of a short-term coverage condition change in the wireless communications cell and a second indication signal indicative of a long-term coverage condition change in the wireless communication cell; and
cause the antenna array to modify the GoB in response to the short-term coverage condition change and the long-term coverage condition change in the wireless communications cell.
15. The WCS of claim 14 , wherein the at least one remote unit further comprises a signal processing circuit configured to determine the coverage condition change in the wireless communications cell based on at least one coverage indication parameter.
16. The WCS of claim 15 , wherein the signal processing circuit is further configured to generate the indication signal indicative of the coverage condition change in the wireless communications cell.
17. The WCS of claim 16 , wherein the signal processing circuit is further configured to determine the coverage condition change in the wireless communications cell based on the at least one coverage indication parameter selected from the group consisting of: a reference signal received power (RSRP) measurement, a user equipment (UE) count, a resource usage indicator, and a UE timing advance indicator.