Sub-Subframe Assignment and HARQ Timing

Patent metadata

Field	Value
Publication number	US-2018198570-A1
Application number	US-201615030549-A
Country	US
Kind code	A1
Filing date	Mar 9, 2016
Priority date	Mar 9, 2015
Publication date	Jul 12, 2018
Grant date	—

Abstract

In one aspect, a wireless device receives a first data transmission from a base station during a predetermined subframe interval and within a duration that is less than a maximum data transmission duration that is possible within the predetermined subframe interval, and determines a transmission time for transmitting HARQ feedback to the base station such that the determined transmission time depends on which subset of symbols within the predetermined subframe interval was used for the first data transmission. The wireless device transmits HARQ feedback for the first data transmission at the determined transmission time. In another aspect, a base station transmits the first data transmission and determines a reception time for receiving HARQ feedback such that the determined transmission time depends on which subset of symbols within the predetermined subframe interval was used. The base station receives HARQ feedback for the first data transmission at the determined transmission time.

First claim

1 - 34 . (canceled)

35 . A method, in a first wireless device, the method comprising:
receiving a first data transmission from a second wireless device, wherein the first data transmission is received during a predetermined subframe interval and within a duration that is less than a maximum data transmission duration that is possible within the predetermined subframe interval; determining a transmission time for transmitting hybrid automatic repeat request (HARQ) feedback to the second wireless device, such that the determined transmission time depends on which subset of symbols within the predetermined subframe interval was used for the first data transmission; and transmitting HARQ feedback for the first data transmission at the determined transmission time.

36 . The method of claim 35 , wherein determining the transmission time for transmitting HARQ feedback to the second wireless device comprises determining the transmission time based on the duration of the first data transmission or a timing of the first data transmission within the predetermined subframe interval, or both.

37 . The method of claim 35 , wherein the length of the predetermined subframe interval is 1 millisecond and consists of 14 orthogonal frequency-division multiplexing (OFDM) symbols.

38 . The method of claim 35 , wherein the determined transmission time is based on the duration of the first data transmission and a position, within the predetermined subframe interval, of a last symbol of the first data transmission.

39 . The method of claim 35 , wherein the predetermined subframe interval has a first slot and a second slot, the first data transmission is received entirely within either the first slot or the second slot, and the determined transmission time depends on whether the first data transmission is received in the first slot or the second slot.

40 . The method of claim 35 , wherein determining the transmission time comprises retrieving an offset value from a lookup table indexed by an allocation index corresponding to at least the duration of the first data transmission, and identifying the transmission time based on the retrieved offset value and a timing of the first data transmission.

41 . The method of claim 35 , wherein the determined transmission time further depends on a transport block size for the first data transmission.

42 . The method of claim 35 , wherein the determined transmission time further depends on a number of spatially multiplexed layers for the first data transmission, or a timing advance value, or both.

43 . The method of claim 35 , wherein transmitting HARQ feedback for the first data transmission at the determined transmission time comprises bundling the HARQ feedback for the first data transmission with additional HARQ feedback for an additional data transmission received by the first wireless device in an interval different from the interval in which the first data transmission is received.

44 . A method, in a first wireless device, the method comprising:
transmitting a first data transmission to a second wireless device, wherein the first data transmission is transmitted during a predetermined subframe interval and within a duration that is less than a maximum data transmission duration that is possible within the predetermined subframe interval; determining a reception time for receiving hybrid automatic repeat request (HARQ) feedback from the second wireless device, such that the determined transmission time depends on which subset of symbols within the predetermined subframe interval was used for the first data transmission; and receiving HARQ feedback for the first data transmission at the determined transmission time.

45 . The method of claim 44 , wherein determining the reception time for receiving HARQ feedback from the second wireless device comprises determining the transmission time based on the duration of the first data transmission or a timing of the first data transmission within the predetermined subframe interval, or both.

46 . The method of claim 44 , wherein the length of the predetermined subframe interval is 1 millisecond and consists of 14 orthogonal frequency-division multiplexing (OFDM) symbols.

47 . The method of claim 44 , wherein the determined reception time is based on the duration of the first data transmission and a position, within the predetermined subframe interval, of a last symbol of the first data transmission.

48 . The method of claim 44 , wherein the predetermined subframe interval has a first slot and a second slot, the first data transmission is transmitted entirely within either the first slot or the second slot, and the determined reception time depends on whether the first data transmission is transmitted in the first slot or the second slot.

49 . The method of claim 44 , wherein determining the transmission time comprises retrieving an offset value from a lookup table indexed by an allocation index corresponding to at least the duration of the first data transmission, and identifying the transmission time based on the retrieved offset value and a timing of the first data transmission.

50 . The method of claim 44 , wherein the determined transmission time further depends on a transport block size for the first data transmission.

51 . The method of claim 44 , wherein the determined transmission time further depends on a number of spatially multiplexed layers for the first data transmission, or a timing advance value, or both.

52 . The method of claim 44 , wherein receiving HARQ feedback for the first data transmission at the determined transmission time comprises receiving bundled feedback comprising the HARQ feedback for the first data transmission and additional HARQ feedback for an additional data transmission transmitted to the second wireless device in an interval different from the interval in which the first data transmission is transmitted.

53 . A method, in a first wireless device, the method comprising:
receiving a first data transmission from a second wireless device, wherein the first data transmission is received during a predetermined subframe interval, and wherein said receiving comprises decoding fewer than all of a scheduled number of symbols in the first data transmission; determining a transmission time for transmitting hybrid automatic repeat request (HARQ) feedback to the second wireless device, such that the determined transmission time depends on which subset of symbols within the predetermined subframe interval was used in said decoding; and transmitting HARQ feedback for the first data transmission at the determined transmission time.

54 . The method of claim 53 , wherein the determined transmission time depends on the position of the last symbol used in said decoding.

55 . A method, in a first wireless device, the method comprising:
transmitting a first data transmission to a second wireless device, wherein the first data transmission is transmitted during a predetermined subframe interval; determining a reception time for receiving hybrid automatic repeat request (HARQ) feedback from the second wireless device, such that the determined transmission time depends on which subset of symbols within the predetermined subframe interval was used by the second wireless device for decoding the first data transmission; and receiving HARQ feedback for the first data transmission at the determined transmission time.

56 . The method of claim 55 , wherein the deter

Assignees

• Ericsson Telefon Ab L M

Inventors

• Astely David
• Andersson Mattias
• Andgart Niklas
• Bergman Johan
• Määttanen Helka-Liina
• Parkvall Stefan

Classifications

• H04L5/0053

  Allocation of signalling, i.e. of overhead other than pilot signals · CPC title

• H04L1/1812

  Hybrid protocols; Hybrid automatic repeat request [HARQ] · CPC title

• H04L1/1893

  Physical mapping arrangements (physical resource mapping in general H04L5/00) · CPC title

• H04L5/0044

  Allocation of payload; Allocation of data channels, e.g. PDSCH or PUSCH · CPC title

• H04W72/0446

  Resources in time domain, e.g. slots or frames · CPC title