Method and System for Handling of a Transport Block Size Change in an Adaptive Retransmit Order

• US 20130182653A1
• Filed: 06/07/2012
• Published: 07/18/2013
• Est. Priority Date: 01/12/2012
• Status: Active Grant

• Current Assignee: Malikie Innovations Limited (Key Patent Innovations Limited)
• Original Assignee: Blackberry Limited
• Inventors: Earnshaw, Mark, Cai, Zhijun
• Granted Patent: US 9,178,664 B2
• Time in Patent Office: Days
• US Class Current: 370/329
• CPC Class Codes: H04L 1/0003 by switching between different modulation schemes
• CPC Class Codes: H04L 1/0007 by modifying the frame length
• CPC Class Codes: H04L 1/0009 by adapting the channel coding H04L1/1812 takes precedence
• CPC Class Codes: H04L 1/1819 with retransmission of additional or different redundancy
• CPC Class Codes: H04L 1/1822 involving configuration of automatic repeat request [ARQ] with parallel processes

Abstract

A method and apparatus for handling a downlink control information indication for retransmission, the method receiving a downlink control information indication for retransmission of a hybrid automatic repeat request (HARQ) process; and if a transport block size in the downlink control information has changed compared with a transport block size associated with the HARQ process or a previous uplink grant for the HARQ process: handling the downlink control information indication for retransmission.

Claims

1. A method comprising:

receiving, at a user equipment, a downlink control information indication for retransmission of a hybrid automatic repeat request (HARQ) process; and

if a transport block size in the downlink control information has changed compared with a transport block size associated with the HARQ process or a previous uplink grant for the HARQ process;

handling the downlink control information indication for retransmission.

3. The method of claim 1, wherein the downlink control information is for a cell radio network temporary identifier (C-RNTI) for the user equipment.

6. The method of claim 1, wherein the handling comprises discarding an uplink grant associated with the downlink control information.

8. The method of claim 3, wherein the handling comprises selecting, by the user equipment, one of:

treating the downlink control information as representing a new data transmission;

discarding an uplink grant associated with the downlink control information; and

ignoring the transport block size in the downlink control information and utilizing the transport block size associated with the HARQ process or with the previous uplink grant for the HARQ process.

10. The method of claim 3, wherein the handling comprises one of:

treating the downlink control information as representing a new data transmission;

discarding an uplink grant associated with the downlink control information; and

ignoring the transport block size in the downlink control information and utilizing the transport block size associated with the HARQ process or with the previous uplink grant for the HARQ process, and

wherein the handling for the C-RNTI is independent of a handling for a semi persistent scheduling (SPS) C-RNTI and a Temporary C-RNTI.

11. The method of claim 1, wherein the downlink control information is for a semi persistent scheduling (SPS) cell radio network temporary identifier C-RNTI) for the user equipment.

12. The method of claim 11, wherein the handling comprises discarding an uplink grant associated with the downlink control information.

14. The method of claim 11, wherein the handling comprises selecting, by the user equipment, one of:

discarding an uplink grant associated with the downlink control information; and

ignoring the transport block size in the downlink control information and utilizing the transport block size associated with the HARQ process or with the previous uplink grant for the HARQ process.

16. The method of claim 11, wherein the handling comprises one of:

discarding an uplink grant associated with the downlink control information; and

ignoring the transport block size in the downlink control information and utilizing the transport block size associated with the HARQ process or with the previous uplink grant for the HARQ process, and

wherein the handling for the SPS C-RNTI is independent of a handling for a C-RNTI and a Temporary C-RNTI.

17. The method of claim 1, wherein the downlink control information is for a Temporary cell radio network temporary identifier (C-RNTI) for the user equipment.

18. The method of claim 17, wherein the handling comprises discarding an uplink grant associated with the downlink control information.

20. The method of claim 17, wherein the handling comprises selecting, by the user equipment, one of:

discarding an uplink grant associated with the downlink control information; and

ignoring the transport block size in the downlink control information and utilizing the transport block size associated with the HARQ process or with the previous uplink grant for the HARQ process.

22. The method of claim 17, wherein the handling comprises one of:

discarding an uplink grant associated with the downlink control information; and

ignoring the transport block size in the downlink control information and utilizing the transport block size associated with the HARQ process or with the previous uplink grant for the HARQ process, and

wherein the handling for the Temporary C-RNTI is independent of a handling for a semi persistent scheduling (SPS) C-RNTI and a C-RNTI.

2. (canceled)

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23. A user equipment comprising:

a processor; and

a communications subsystem,

wherein the user equipment is configured to;

receive a downlink control information indication of retransmission of a hybrid automatic repeat request (HARQ) process; and

if a transport block size in the downlink control information has changed compared with a transport block size associated with the HARQ process or with a previous uplink grant for the HARQ process;

handle the downlink control information indication for retransmission.

25. The user equipment of claim 23, wherein the downlink control information is for a cell radio network temporary identifier (C-RNTI) for the user equipment.

28. The user equipment of claim 25, wherein the user equipment is configured to handle by discarding an uplink grant associated with the downlink control information.

30. The user equipment of claim 25, wherein the user equipment is configured to handle by selecting one of:

treating the downlink control information as representing a new data transmission;

discarding an uplink grant associated with the downlink control information; and

ignoring the transport block size in the downlink control information and utilizing the transport block size associated with the HARQ process or with the previous uplink grant for the HARQ process.

32. The user equipment of claim 25, wherein the user equipment is configured to handle by:

treating the downlink control information as representing a new data transmission;

discarding an uplink grant associated with the downlink control information;

or

ignoring the transport block size in the downlink control information and utilizing the transport block size associated with the HARQ process or with the previous uplink grant for the HARQ process, and

wherein the selecting for the C-RNTI is independent of a selection for a semi persistent scheduling (SPS) C-RNTI and a Temporary C-RNTI.

33. The user equipment of claim 23, wherein the downlink control information is for a semi persistent scheduling (SPS) cell radio network temporary identifier (C-RNTI) for the user equipment.

34. The user equipment of claim 33, wherein the handling comprises discarding an uplink grant associated with the downlink control information.

36. The user equipment of claim 33, wherein the user equipment is configured to handle by selecting one of:

discarding an uplink grant associated with the downlink control information; and

ignoring the transport block size in the downlink control information and utilizing the transport block size associated with the HARQ process or with the previous uplink grant for the HARQ process.

38. The user equipment of claim 33, wherein the user equipment is configured to handle by:

discarding an uplink grant associated with the downlink control information;

or

ignoring the transport block size in the downlink control information and utilizing the transport block size associated with the HARQ process or with the previous uplink grant for the HARQ process, and

wherein the selecting for the SPS C-RNTI is independent of a selection for a C-RNTI and a Temporary C-RNTI.

39. The user equipment of claim 23, wherein the downlink control information is for a Temporary cell radio network temporary identifier (C-RNTI) for the user equipment.

40. The user equipment of claim 39, wherein the handling comprises discarding an uplink grant associated with the downlink control information.

42. The user equipment of claim 39, wherein the user equipment is configured to handle by selecting one of:

discarding an uplink grant associated with the downlink control information; and

ignoring the transport block size in the downlink control information and utilizing the transport block size associated with the HARQ process or with the previous uplink grant for the HARQ process.

44. The user equipment of claim 39, wherein the user equipment is configured to handle by:

discarding an uplink grant associated with the downlink control information;

or

ignoring the transport block size in the downlink control information and utilizing the transport block size associated with the HARQ process or with the previous uplink grant for the HARQ process, and

wherein the selecting for the Temporary C-RNTI is independent of a selection for a semi persistent scheduling (SPS) C-RNTI and a C-RNTI.

24. (canceled)

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