Method and controller for low-overhead user equipment measurements

• US 10,306,504 B2
• Filed: 06/12/2017
• Issued: 05/28/2019
• Est. Priority Date: 10/30/2014
• Status: Active Grant

• Current Assignee: Huawei Technologies Co., Ltd. (Huawei Investment & Holding Co., Ltd.)
• Original Assignee: Huawei Technologies Co., Ltd. (Huawei Investment & Holding Co., Ltd.)
• Inventors: Baligh, Mohammadhadi, Zarifi, Keyvan, Ma, Jianglei
• Primary Examiner(s): Zhao, Wei
• Application Number:
  US15/620,337
• Publication Number:
  US 20170280346A1
• Time in Patent Office: 715 Days
• CPC Class Codes: H04W 24/10 Scheduling measurement reports ; Arrangements for measurement reports
• CPC Class Codes: H04W 48/16 Discovering, processing access restriction or access information
• CPC Class Codes: H04W 48/20 Selecting an access point

Abstract

An embodiment method includes identifying a plurality of VTP configurations representing allocations of TPs among a plurality of VTPs each having at least one TP. Potential serving VTPs are then identified for a selected UE in a plurality of UEs according to at least one UE centric criterion. The potential serving VTPs are selected for each of the plurality of VTP configurations. A UE measurement set is then scheduled for the potential serving VTPs for a scheduled channel resource according to measurement parameters. The method further includes selecting a serving VTP configuration from the plurality of VTP configurations according to UE measurement feedback from the selected UE.

Claims

1. A method of selecting a configuration of serving wireless virtual transmit points (VTPs) to serve a plurality of user equipments (UEs), comprising:

identifying a plurality of wireless VTP configurations,

each wireless VTP configuration representing an allocation of wireless transmit points (TPs) among a plurality of wireless VTPs, and

each wireless VTP comprising at least one wireless TP;

for each of the plurality of wireless VTP configurations, identifying potential serving wireless VTPs for a selected UE in the plurality of UEs according to at least one UE centric criterion;

scheduling a UE wireless channel measurement set for the potential serving wireless VTPs for a scheduled wireless channel resource according to measurement parameters, the measurement parameters including one or more of;

similarities among the plurality of wireless VTP configurations, respective importance of the plurality of wireless VTP configurations, respective importance of the plurality of UEs, or relative power received from potential interferer TPs; and

selecting a serving wireless VTP configuration from the plurality of wireless VTP configurations in accordance with UE wireless channel measurement feedback received from the selected UE.

2. The method of claim 1 wherein the at least one UE centric criterion includes UE location.

3. The method of claim 1 wherein the at least one UE centric criterion includes UE quality of service (QoS).

4. The method of claim 1 wherein the at least one UE centric criterion includes UE quality of experience (QoE).

5. The method of claim 1 wherein the UE wireless channel measurement set includes a first group of UE wireless channel measurements for a first wireless VTP configuration of the plurality of wireless VTP configurations and excludes a second group of UE wireless channel measurements for a second wireless VTP configuration of the plurality of wireless VTP configurations, when the second group of UE wireless channel measurements correspond to at least one wireless TP allocation common to the first wireless VTP configuration and the second wireless VTP configuration.

6. The method of claim 1 wherein the UE wireless channel measurement set includes fewer UE wireless channel measurements in a frequency domain for less important wireless VTP configurations than for more important wireless VTP configurations.

7. The method of claim 1 wherein the UE wireless channel measurement set includes fewer UE wireless channel measurements in a time domain for less important wireless VTP configurations than for more important wireless VTP configurations.

8. The method of claim 1 wherein the UE wireless channel measurement set excludes UE wireless channel measurements for UEs not near a cell edge.

9. The method of claim 1 wherein the UE wireless channel measurement set includes wireless channel interference measurements having high received power more frequently in a time domain and a frequency domain than wireless channel interference measurements having low received power.

10. The method of claim 1 wherein the UE wireless channel measurement feedback includes UE wireless channel measurements made for a second wireless VTP configuration using pilots transmitted for UE wireless channel measurements for a first wireless VTP configuration.

11. The method of claim 1, wherein selecting the serving wireless VTP configuration comprises selecting the potential serving wireless VTPs for the serving wireless VTP configuration as respective serving wireless VTPs for the selected UE.

12. The method of claim 1, wherein the identifying the potential serving wireless VTPs, the scheduling the UE wireless channel measurement set, and the selecting the serving wireless VTP configuration are performed for multiple selected UEs.

13. A controller for a wireless communication system having wireless transmit points (TPs) serving a region within which a plurality of user equipments (UEs) are disposed, comprising:

a memory configured to store a plurality of wireless virtual transmit point (VTP) configurations according to which the wireless TPs are allocable into a plurality of wireless VTPs, wherein each of wireless VTP configuration represents an allocation of the wireless TPs;

a transceiver configured to transmit UE wireless channel measurement instructions to and receive UE wireless channel measurement feedback from the wireless TPs and a selected UE in the plurality of UEs; and

a processor coupled to the memory and the transceiver, and configured to;

identify, for each of the plurality of wireless VTP configurations, potential serving wireless VTPs for the selected UE according to at least one UE centric criterion;

schedule a UE wireless channel measurement set for the potential serving wireless VTPs for a scheduled wireless channel resource according to measurement parameters, the measurement parameters including one or more of similarities among the plurality of wireless VTP configurations, respective importance of the plurality of wireless VTP configurations, respective importance of the plurality of UEs, or relative power received from potential interferer TPs;

generate and cause the transceiver to transmit the UE wireless channel measurement instructions according to the UE wireless channel measurement set; and

select a serving wireless VTP configuration from the plurality of wireless VTP configurations in accordance with the UE wireless channel measurement feedback received from the selected UE by the transceiver.

14. The controller for the wireless communication system of claim 13 wherein the at least one UE centric criterion includes UE location.

15. The controller for the wireless communication system of claim 13 wherein the at least one UE centric criterion includes UE quality of service (QoS).

16. The controller for the wireless communication system of claim 13 wherein the at least one UE centric criterion includes UE quality of experience (QoE).

17. The controller for the wireless communication system of claim 13 wherein the UE wireless channel measurement set includes a first group of UE wireless channel measurements for a first wireless VTP configuration of the plurality of wireless VTP configurations and excludes a second group of UE wireless channel measurements for a second wireless VTP configuration of the plurality of wireless VTP configurations, when the second group of UE wireless channel measurements correspond to at least on wireless TP allocation common to the first wireless VTP configuration and the second wireless VTP configuration.

18. The controller for the wireless communication system of claim 13 wherein the UE wireless channel measurement set includes fewer UE wireless channel measurements in a frequency domain for less important wireless VTP configurations than for more important wireless VTP configurations.

19. The controller for the wireless communication system of claim 13 wherein the UE wireless channel measurement set includes fewer UE wireless channel measurements in a time domain for less important wireless VTP configurations than for more important wireless VTP configurations.

20. The controller for the wireless communication system of claim 13 wherein the UE wireless channel measurement set excludes UE wireless channel measurements for UEs not near a cell edge.

21. The controller for the wireless communication system of claim 13 wherein the UE wireless channel measurement set includes wireless channel interference measurements having high received power more frequently in a time domain and a frequency domain than wireless channel interference measurements having low received power.

22. The controller for the wireless communication system of claim 13 wherein the UE wireless channel measurement feedback includes UE wireless channel measurements made for a second wireless VTP configuration using pilots transmitted for UE wireless channel measurements for a first wireless VTP configuration.

23. The controller for the wireless communication system of claim 13, wherein the processor configured to select the serving wireless VTP configuration comprises the processor configured to select the potential serving wireless VTPs for the serving wireless VTP configuration as respective serving wireless VTPs for the selected UE.

24. The controller for the wireless communication system of claim 13, wherein the processor is configured to identify the potential serving wireless VTPs, to schedule the UE wireless channel measurement set, to generate and cause the transmit the UE wireless channel measurement instructions, and to select the serving wireless VTP configuration, for multiple selected UEs.