Method and arrangement for improved link quality control

• US 8,295,370 B2
• Filed: 06/13/2006
• Issued: 10/23/2012
• Est. Priority Date: 02/10/2006
• Status: Active Grant

• Current Assignee: Telefonaktiebolaget LM Ericsson
• Original Assignee: Telefonaktiebolaget LM Ericsson
• Inventors: Jönsson, Tomas, Olsson, Magnus, Thurfjell, Magnus
• Primary Examiner(s): Kassa, Zewdu
• Application Number:
  US12/279,020
• Publication Number:
  US 20090154574A1
• Time in Patent Office: 2,324 Days
• Field of Search: 375/259, 375/295, 375/316, 370/329, 370/330, 455/69, 455/450, 455/552
• US Class Current: 375/259
• CPC Class Codes: H04L 1/0003 by switching between different modulation schemes
• CPC Class Codes: H04L 1/0009 by adapting the channel coding H04L1/1812 takes precedence
• CPC Class Codes: H04L 1/0015 characterised by the adaptation strategy
• CPC Class Codes: H04L 1/0026 Transmission of channel quality indication
• CPC Class Codes: H04L 2001/0093 Point-to-multipoint
• CPC Class Codes: H04W 24/10 Scheduling measurement reports ; Arrangements for measurement reports

Abstract

In a method of link quality control for communication links between a plurality of mobile terminals and a node in a radio communication system, providing (S0) at least one data block for transmission between said node and at least one of said mobile terminals, providing (S1) at least two measurement reports comprising measurements of the quality for a plurality of potential burst constellations on which to transmit said at least one data block, jointly selecting (S2) a respective burst constellation for each said at least one data block based at least on said measurement reports, jointly selecting (S3) a respective modulation and coding scheme for each said data block based at least on said measurement reports. Subsequently, scheduling (S4) bursts for transmission on at least one available channel based at least on said jointly selected modulation and coding scheme and said jointly selected burst constellation.

Claims

1. A method of link quality control for communication links between a plurality of mobile terminals and a node in a radio communication system, said method comprising the steps of:

providing at least one data block for transmission between said node and at least one of said mobile terminals,

providing at least two measurement reports comprising measurements of the quality for a plurality of potential burst constellations on which to transmit said at least one data block, wherein said plurality of potential burst constellations comprises a sub-set of all potential burst constellations;

jointly selecting a respective burst constellation and a respective Modulation and Coding Scheme (MCS) for each said at least one data block based at least on said measurement reports; and

scheduling bursts for transmission on at least one available channel based at least on said jointly selected MCS and burst constellation.

2. The method according to claim 1, wherein said node is a base transceiver station.

3. The method according to claim 2, wherein said at least one data block is provided at the base transceiver station for downlink transmission to at least one of said mobile terminals.

4. The method according to claim 3, wherein said at least two measurement reports are provided by each of said at least one mobile terminal.

5. The method according to claim 2, wherein said at least one data block is provided at said at least one mobile terminal for uplink transmission to said base transceiver station.

6. The method according to claim 5, wherein said at least two measurement reports are provided by said base transceiver station.

7. The method according to claim 1, wherein burst constellations in said plurality of potential burst constellations are allocated in time, and frequency.

8. The method according to claim 1, wherein burst constellations in said plurality of potential burst constellations are selected based on quality of service requirements for said at least one mobile terminal.

9. The method according to claim 1, wherein said bursts are scheduled sequentially on the same carrier.

10. The method according to claim 1, wherein said bursts are scheduled simultaneously and in parallel on a number of carriers.

11. The method according to claim 1, wherein said bursts are scheduled in parallel pairs and sequentially on two carriers.

12. The method according to claim 7, wherein said burst constellations in said plurality of potential burst constellations are additionally allocated between different time slots.

13. The method according to claim 1, wherein available channels are divided into at least two groups of channels.

14. The method according to claim 13 wherein said at least two groups comprise frequency-hopping and non-frequency-hopping channels respectively.

15. The method according to claim 14, wherein the data blocks are scheduled for transmission on hopping or non-hopping channels based on the selected MCS.

16. The method according to claim 15, wherein the data blocks are prioritized for scheduling for transmission on hopping or non-hopping channels based on the selected MCS.

17. The method according to claim 1, wherein said data block is a radio link control block.

18. A system for link quality control of communication links between a plurality of mobile terminals and a node in a radio communication system, said system is configured to perform the following:

provide at least one data block for transmission between said node and at least one of said plurality of mobile terminals;

further provide at least two measurement reports comprising measurements of the quality for potential burst constellations on which to schedule said at least one data block for transmission, wherein said two measurement reports comprise measurements of the quality for a subset of all potential burst constellations on which to schedule said at least one data block for transmission;

jointly select a respective burst constellation and a respective Modulation and Coding Scheme (MCS) for said at least one data block based at least on said measurement reports; and

schedule bursts for transmission on at least one available channel based at least on said jointly selected MCS and burst constellation.

19. An arrangement for link quality control of communication links between a plurality of mobile terminals and a node in a radio communication system, said arrangement is adapted to perform the following:

provide at least one data block for transmission between said node and at least one of said plurality of mobile terminals;

further provide at least two measurement reports comprising measurements of the quality for potential burst constellations on which to schedule said at least one data block for transmission, wherein said two measurement reports comprise measurements of the quality for a subset of all potential burst constellations on which to schedule said at least one data block for transmission;

jointly select a respective burst constellation and a respective Modulation and Coding Scheme (MCS) for said at least one data block based at least on said measurement reports; and

schedule bursts for transmission on at least one available channel based at least on said jointly selected MCS and burst constellation.

20. A base transceiver station in a radio communication system, comprising an arrangement according to claim 19.

21. The base transceiver station according to claim 20, wherein said arrangement is adapted to receive said at least two measurement reports from each of said plurality of mobile terminals, and further adapted to schedule data blocks for downlink transmission from said base transceiver station to said plurality of mobile terminals.

22. The base transceiver station according to claim 20, wherein said arrangement is adapted to perform said quality measurements for said subset of potential burst constellations and provide said measurement reports, and wherein said arrangement is further adapted to instruct each of said plurality of mobile terminals to schedule data blocks for uplink transmission from said mobile terminal to said base transceiver station according to the selected burst constellation and MCS.