System and method for measuring and reporting uplink channel condition

Patent metadata

Field	Value
Publication number	US-9848349-B2
Application number	US-201213560224-A
Country	US
Kind code	B2
Filing date	Jul 27, 2012
Priority date	Jul 28, 2011
Publication date	Dec 19, 2017
Grant date	Dec 19, 2017

Abstract

A method for reporting channel condition includes receiving an initial configuration identifying a group of assessment devices, and determining a channel condition for each communications channel between one of the assessment devices and the transmission point. The method also includes comparing each of the channel conditions with a first threshold, and transmitting a report to a network entity if at least one of the channel conditions meets the first threshold.

First claim

What is claimed is:

1. A method comprising:
receiving, by a transmission point, an initial configuration identifying a group of assessment devices;
determining, by the transmission point, a channel condition for each communications channel between one of the assessment devices and the transmission point, wherein the determining comprises:
measuring, by the transmission point, a received signal strength for a signal transmitted by the assessment device;
obtaining, by the transmission point from another network entity other than the transmission point, a transmit power level of the signal transmitted by the assessment device; and
setting, by the transmission point, the channel condition for the communications channel to a difference between the transmit power level of the signal and the received signal strength of the signal;

comparing, by the transmission point, each of the channel conditions with a first threshold;
transmitting, by the transmission point, a report to a network entity in response to at least one of the channel conditions meeting the first threshold; and
transmitting, by the transmission point, an uplink CoMP transmission to a group of uplink coordinated multiple point (CoMP) receiving devices grouped in accordance with the report, for multiple point reception and reconstruction of the uplink CoMP transmission from the transmission point to the group of uplink CoMP receiving devices.

2. The method of claim 1 , wherein the initial configuration comprises an event trigger in accordance with the first threshold.

3. The method of claim 2 , wherein the initial configuration further comprises the first threshold.

4. The method of claim 1 , wherein the initial configuration is received in a radio resource control message.

5. The method of claim 1 , further comprising receiving an updated configuration.

6. The method of claim 5 , wherein the updated configuration identifies an updated group of assessment devices.

7. The method of claim 5 , wherein the update configuration is received in a radio resource control message.

8. The method of claim 1 , wherein the group of assessment devices comprises a group of cooperating devices.

9. The method of claim 1 , further comprising obtaining the transmit power level of the signal from a message containing transmit power level information.

10. The method of claim 1 , further comprising obtaining the transmit power level of the signal from a configuration parameter provided in the initial configuration.

11. The method of claim 1 , wherein the received signal strength and the transmit power level are for a first unidirectional channel between one of the assessment devices and the transmission point, wherein the channel condition is for a second unidirectional channel between the transmission point and one of the assessment devices, and wherein the first unidirectional channel is a downlink channel and the second unidirectional channel is an uplink channel.

12. The method of claim 1 , wherein the report comprises the channel conditions and identity information of assessment devices.

13. The method of claim 1 , wherein the report comprises the at least one of the channel conditions that meet the first threshold and identity information of assessment devices associated with the at least one of the channel conditions.

14. The method of claim 1 , wherein the report is transmitted in a radio resource control message.

15. The method of claim 1 , wherein the first threshold comprises a reference channel condition.

16. The method of claim 15 , wherein the reference channel condition comprises a major channel condition of a major channel between the transmission point and a major point.

17. The method of claim 1 , wherein the first threshold comprises a reference channel condition and a second threshold.

18. A method for configuring a group of uplink coordinated multiple point (CoMP) receiving devices for a transmission point, the method comprising:
transmitting, by a network entity, an initial configuration identifying a group of assessment devices to the transmission point, the group of assessment devices having a different membership than the group of uplink CoMP receiving devices;
receiving, by the network entity, a report from the transmission point, the report comprising a channel condition for at least one of the assessment devices in the group of assessment devices; and
adjusting, by the network entity, a membership of the group of uplink CoMP receiving devices for the transmission point in accordance with the report to produce an updated group of uplink CoMP receiving devices for multiple point reception and reconstruction of an uplink CoMP transmission from the transmission point to the updated group of uplink CoMP receiving devices.

19. The method of claim 18 , wherein the group of uplink CoMP receiving devices comprises at least one of a coordinated multiple point cooperating set or a coordinated multiple point major point.

20. The method of claim 18 , further comprising:
adjusting a membership of the group of assessment devices in accordance with the report to produce an updated group of assessment devices; and
transmitting an updated configuration identifying the updated group of assessment devices to the transmission point.

21. The method of claim 18 , further comprising transmitting a reference signal at a transmit power level.

22. The method of claim 18 , wherein the report is received in a radio resource control message.

23. A method for configuring a group of uplink coordinated multiple point (CoMP) receiving devices for a transmission point, the method comprising:
determining, by a network entity, a first channel condition for a first communications channel between a first assessment device and the transmission point, wherein the first channel condition is determined in accordance with a reference signal transmitted by the transmission point;
receiving, by the network entity, a second channel condition from a second assessment device for a second communications channel between the second assessment device and the transmission point, wherein the second channel condition is determined in accordance with the reference signal transmitted by the transmission point, and wherein the second assessment device is not a member of the group of uplink CoMP receiving devices; and
adjusting, by the network entity, a membership of the group of uplink CoMP receiving devices for the transmission point in accordance with the first channel condition and the second channel condition to produce an updated group of uplink CoMP receiving devices for multiple point reception and reconstruction of an uplink CoMP transmission from the transmission point to the updated group of uplink CoMP receiving devices.

24. The method of claim 23 , wherein determining the first channel condition comprises receiving the first channel condition from the first assessment device.

25. The method of claim 24 , further comprising specifying one of a time interval, a time event, or a request event for receiving the first channel condition and the second channel condition.

26. The method of claim 23 , wherein the network entity is the first assessment device.

27. The method of claim 26 , further comprising transmitting an initial configuration to the transmission point, the initial configuration specifying transmission parameters for the reference signal.

Assignees

• Sun Yishen
• Bi Hao
• Futurewei Technologies Inc

Inventors

• Sun Yishen
• Bi Hao

Classifications

• H04W24/10 Primary

  Scheduling measurement reports {; Arrangements for measurement reports} · CPC title

• H04W24/02

  Arrangements for optimising operational condition · CPC title