HARQ timing design for a TDD system

Patent metadata

Field	Value
Publication number	US-9331759-B2
Application number	US-201314141265-A
Country	US
Kind code	B2
Filing date	Dec 26, 2013
Priority date	Mar 29, 2013
Publication date	May 3, 2016
Grant date	May 3, 2016

Abstract

Disclosed are methods and apparatuses related to receiving one or more indications of time division duplex (TDD) uplink/downlink (UL/DL) configurations for two consecutive radio frames. Based on the indications of the TDD UL/DL configurations, a reference TDD UL/DL configuration may be identified for one or more Hybrid Automatic Repeat reQuest (HARQ) processes.

First claim

What is claimed is:

1. A user equipment (UE) comprising:
receiver circuitry to receive, from an eNodeB (eNB), a first indication of a first time division duplex (TDD) uplink/downlink (UL/DL) configuration for a first radio frame and a second indication of a second TDD UL/DL configuration that is same or different than the first TDD UL/DL configuration for a second radio frame that immediately follows the first radio frame; and

Hybrid Automatic Repeat reQuest (HARQ) circuitry to:
identify, based at least in part on the first and second indications, a first HARQ timing for a Physical Downlink Shared Channel (PDSCH) or a Physical Uplink Shared Channel (PUSCH) in the first radio frame; and
identify, based at least in part on the second indication, a second HARQ timing for a PDSCH or a PUSCH in the second radio frame that immediately follows the first radio frame.

2. The UE of claim 1 , wherein the first indication or the second indication is a Downlink Control Information (DCI) message.

3. The UE of claim 1 , wherein the first indication is received in a first subframe or a first set of subframes of the first radio frame and the second indication is received in a second subframe or a second set of subframes of the second radio frame.

4. The UE of claim 1 , wherein the first indication is received in a first subframe or a first set of subframes of a third radio frame that immediately precedes the first radio frame, and the second indication is received in a second subframe or a second set of subframes of the first radio frame.

5. The UE of claim 1 , wherein the first indication or the second indication are received in a DL subframe or a set of DL subframes of a TDD UL/DL configuration indicated in a SystemInformationBlockType1 (SIB1) message.

6. The UE of claim 5 , wherein the first indication or the second indication are received in subframe 0, subframe 1, subframe 5, or subframe 6 of the TDD UL/DL configuration.

7. A user equipment (UE) comprising:
receiver circuitry to receive, from an eNodeB (eNB), a first indication of a first time division duplex (TDD) uplink/downlink (UL/DL) configuration for a first radio frame and a second indication of a second TDD UL/DL configuration that is same or different than the first TDD UL/DL configuration for a second radio frame that immediately follows the first radio frame; and

Hybrid Automatic Repeat reQuest (HARQ) circuitry to:
identify based at least in t on the first and second indication, a first HARQ timing for a Physical Downlink Shared Channel (PDSCH) or a Physical Uplink Shared Channel (PUSCH) in the first radio frame; and
identify, based at least in part on the second indication, a second HARQ timing a PDSCH or a PUSCH in the second radio frame that immediately follows the first radio frame,
wherein the first indication is received in a first subframe or first set of subframes of the first radio frame or a second subframe or a second set of subframes of a third radio frame immediately preceding the first radio frame, and the second indication is received in a third subframe or third set of subframes of the first radio frame or a fourth subframe or fourth set of subframes of the second radio frame.

8. A method comprising:
receiving, by a user equipment (UE) from an eNodeB (eNB), a first indication of a first time division duplex (TDD) uplink/downlink (UL/DL) configuration for a first radio frame;
receiving, by the UE, a second indication of a second TDD UL/DL configuration for a second radio frame immediately following the first radio frame; and
identifying, by the UE and based at least in part on the first indication and the second indication, a reference TDD UL/DL configuration for Hybrid Automatic Repeat reQuest (HARQ) timing determination associated with a first subframe in the first radio frame.

9. The method of claim 8 , further comprising identifying, by the UE, the reference TDD UL/DL configuration based at least in part on whether a HARQ acknowledgement signal associated with a data received in the first subframe is to be transmitted by the UE in the first radio frame or the second radio frame in accordance with the first TDD UL/DL configuration.

10. The method of claim 8 , wherein the reference TDD UL/DL configuration is the second TDD UL/DL configuration if DL subframes in the first TDD UL/DL configuration of the first radio frame are a subset of DL subframes in the second TDD UL/DL configuration of the second radio frame.

11. The method of claim 8 , wherein the reference TDD UL/DL configuration is the first TDD UL/DL configuration if DL subframes in the first TDD UL/DL configuration of the first radio frame are a superset of DL subframes in the second TDD UL/DL configuration of the second radio frame.

12. The method of claim 8 , wherein the first TDD UL/DL configuration has a first configuration of UL subframes and the second TDD UL/DL configuration has a second configuration of UL subframes;
wherein at least a portion of the UL subframes in the first TDD UL/DL are UL subframes in the second TDD UL/DL configuration; and
wherein the reference TDD UL/DL configuration is a third TDD UL/DL configuration having a configuration of UL subframes that only includes the portion of UL subframes.

13. The method of claim 12 , wherein the reference TDD UL/DL configuration is TDD UL/DL configuration 4 if the first TDD UL/DL configuration is TDD UL/DL configuration 3 and the second TDD UL/DL configuration is TDD UL/DL configuration 1;
wherein the reference TDD UL/DL configuration is TDD UL/DL configuration 4 if the first TDD UL/DL configuration is TDD UL/DL configuration 1 and the second TDD UL/DL configuration is TDD UL/DL configuration 1;
wherein the reference TDD UL/DL configuration is TDD UL/DL configuration 5 if the first TDD UL/DL configuration is TDD UL/DL configuration 3 or TDD UL/DL configuration 4, and the second TDD UL/DL configuration is TDD UL/DL configuration 2; and
wherein the reference TDD UL/DL configuration is TDD UL/DL configuration 5 if the first TDD UL/DL configuration is TDD UL/DL configuration 2, and the second TDD UL/DL configuration is TDD UL/DL configuration 3 or TDD UL/DL configuration 4.

14. The method of claim 12 , wherein the reference TDD UL/DL configuration is TDD UL/DL configuration 0 if the first TDD UL/DL configuration is TDD UL/DL configuration 0;
wherein the reference TDD UL/DL configuration is TDD UL/DL configuration 6 if the first TDD UL/DL configuration is TDD UL/DL configuration 6, and the second TDD UL/DL configuration is TDD UL/DL configuration 3; and
wherein the reference TDD UL/DL configuration is the TDD UL/DL configuration 3 if the first TDD UL/DL configuration is TDD UL/DL configuration 2, and the second TDD UL/DL configuration is TDD UL/DL configuration 3.

15. The method of claim 12 , further comprising transmitting, by the UE, a HARQ acknowledgement signal from the UE in accordance with the reference TDD UL/DL configuration.

16. The method of claim 15 , further comprising transmitting, by the UE, the HARQ acknowledgement signal on a third generation partnership project (3GPP) physical uplink control channel (PUCCH) or a Physical Uplink Shared Channel (PUSCH).

17. One or more non-transitory computer readable storage media comprising instructions to cause a user equipment (UE), upon execution of the instructions by a processor of the UE, to:
receive a first indication of a time division duplex (TDD) uplink/downlink (UL/DL) configuration for a first radio frame;
receive, from an eNodeB (eNB), a second indication of a second TDD UL/DL configuration for a second ra

Assignees

• Intel Ip Corp

Inventors

• He Hong
• Fwu Jong-Kae
• Khoryaev Alexey
• Han Seunghee

Classifications

• H04N21/8456

  by decomposing the content in the time domain, e.g. in time segments · CPC title

• H04L5/0051

  of dedicated pilots, i.e. pilots destined for a single user or terminal · CPC title

• H04L65/80

  Responding to QoS · CPC title

• H04B7/063

  Parameters other than those covered in groups H04B7/0623 - H04B7/0634, e.g. channel matrix rank or transmit mode selection · CPC title

• H04L5/0085

  when channel conditions change · CPC title