Communicating hybrid automatic repeat/request (harq) feedback in wireless communications

Patent metadata

Field	Value
Publication number	US-2016128091-A1
Application number	US-201514808855-A
Country	US
Kind code	A1
Filing date	Jul 24, 2015
Priority date	Nov 3, 2014
Publication date	May 5, 2016
Grant date	—

Abstract

Various aspects described herein relate to transmitting hybrid automatic repeat/request (HARQ) feedback. A HARQ communication can be received over a set of one or more links based on a first scheduling grant. One or more interference parameters related to receiving the HARQ communication can be determined as well as one or more predicted interference parameters for a next HARQ communication. HARQ feedback can be transmitted for the HARQ communication including the one or more interference parameters and the one or more predicted interference parameters.

First claim

What is claimed is:

1 . A method for transmitting hybrid automatic repeat/request (HARQ) feedback, comprising:
receiving a HARQ communication over a set of one or more links based on a first scheduling grant; determining one or more interference parameters related to receiving the HARQ communication; determining one or more predicted interference parameters for a next HARQ communication; and transmitting HARQ feedback for the HARQ communication including the one or more interference parameters and the one or more predicted interference parameters.

2 . The method of claim 1 , wherein determining the one or more interference parameters comprises detecting one or more interference patterns or control messages of one or more neighboring cells based at least in part on detecting one or more pilot signals from the one or more neighboring cells, or one or more null-tones employed by the one or more neighboring cells, or any combination thereof.

3 . The method of claim 1 , wherein determining the one or more predicted interference parameters is based at least in part on interference patterns related to prior HARQ communications.

4 . The method of claim 3 , wherein determining the one or more predicted interference parameters is based at least in part on determining a temporal interference correlation between the interference patterns related to the prior HARQ communications and an interference pattern related to the HARQ communication.

5 . The method of claim 4 , wherein determining the one or more predicted interference parameters is further based at least in part on determining a spectral interference correlation among the interference patterns in the prior HARQ communications.

6 . The method of claim 4 , further comprising generating a Markov chain based on the interference patterns related to the prior HARQ communications to indicate a probability of interferer presence in a transmission time interval, wherein determining the one or more predicted interference parameters are based at least in part on the Markov chain.

7 . The method of claim 1 , further comprising generating the HARQ feedback including one or more auxiliary acknowledgment (ACK)/non-acknowledgement (NACK) bits for each link in the set of one or more links.

8 . The method of claim 7 , wherein generating the HARQ feedback includes determining the auxiliary ACK/NACK bits for each link in the set of one or more links based at least in part on a signal-to-noise ratio of signals over each link in the set of one or more links, a packet error rate estimated based on a log likelihood ratio of a decoded signal over each link in the set of one or more links, or any combination thereof.

9 . The method of claim 1 , further comprising receiving a second scheduling grant for a second instance of the HARQ communication based at least in part on the HARQ feedback.

10 . The method of claim 1 , further comprising transmitting a scheduling request for another instance of the HARQ communication based on the one or more interference parameters and/or the one or more predicted interference parameters.

11 . An apparatus for transmitting hybrid automatic repeat/request (HARQ) feedback, comprising:
a communicating component configured to receive a HARQ communication over a set of one or more links based on a first scheduling grant; an interference determining component configured to determine one or more interference parameters related to receiving the HARQ communication; an interference predicting component configured to determine one or more predicted interference parameters for a next HARQ communication; and a HARQ feedback reporting component configured to transmit HARQ feedback for the HARQ communication including the one or more interference parameters and the one or more predicted interference parameters.

12 . The apparatus of claim 11 , wherein the interference determining component is configured to determine the one or more interference parameters at least in part by detecting one or more interference patterns or control messages of one or more neighboring cells based at least in part on detecting one or more pilot signals from the one or more neighboring cells, or one or more null-tones employed by the one or more neighboring cells.

13 . The apparatus of claim 11 , wherein the interference predicting component is configured to determine the one or more predicted interference parameters based at least in part on interference patterns related to prior HARQ communications.

14 . The apparatus of claim 13 , wherein the interference predicting component is configured to determine the one or more predicted interference parameters based at least in part on determining a temporal interference correlation between the interference patterns related to the prior HARQ communications and an interference pattern related to the HARQ communication.

15 . The apparatus of claim 14 , wherein the interference predicting component is configured to determine the one or more predicted interference parameters further based at least in part on determining a spectral interference correlation among the interference patterns in the prior HARQ communications.

16 . The apparatus of claim 14 , wherein the interference predicting component is further configured to generate a Markov chain based on the interference patterns related to the prior HARQ communications to indicate a probability of interferer presence in a transmission time interval, and wherein the interference predicting component is configured to determine the one or more predicted interference parameters based at least in part on the Markov chain.

17 . The apparatus of claim 11 , wherein the HARQ feedback reporting component is further configured to generate the HARQ feedback including one or more auxiliary acknowledgment (ACK)/non-acknowledgement (NACK) bits for each link in the set of one or more links.

18 . The apparatus of claim 17 , wherein the HARQ feedback reporting component is configured to generate the HARQ feedback at least in part by determining the auxiliary ACK/NACK bits for each link in the set of one or more links based at least in part on a signal-to-noise ratio of signals over each link in the set of one or more links, or a packet error rate estimated based on a log likelihood ratio of a decoded signal over each link in the set of one or more links.

19 . The apparatus of claim 11 , wherein the communicating component is further configured to receive a second scheduling grant for a second instance of the HARQ communication based at least in part on the HARQ feedback.

20 . The apparatus of claim 11 , wherein the communicating component is further configured to transmit a scheduling request for another instance of the HARQ communication based on the one or more interference parameters and the one or more predicted interference parameters.

21 . An apparatus for transmitting hybrid automatic repeat/request (HARQ) feedback, comprising:
means for receiving a HARQ communication over a set of one or more links based on a first scheduling grant; means for determining one or more interference parameters related to receiving the HARQ communication; means for determining one or more predicted interference parameters for a next HARQ communication; and means for transmitting HARQ feedback for the HARQ communication including the one or more interference parameters and the one or more predicted interference parameters.

22 . The apparatus of claim 21 , where

Assignees

• Qualcomm Inc

Inventors

• Azarian Yazdi Kambiz
• Ji Tingfang
• Jiang Jing
• Ang Peter Pui Lok
• Soriaga Joseph Binamira
• Mukkavilli Krishna Kiran
• Bhushan Naga
• Smee John Edward

Classifications

• H04W72/541

  using the level of interference · CPC title

• H04L1/1861

  Physical mapping arrangements (for ACK signaling see also H04L5/0053) · CPC title

• H04L5/0007

  the frequencies being orthogonal, e.g. OFDM(A) or DMT · CPC title

• H04L1/1854

  Scheduling and prioritising arrangements · CPC title

• H04L1/1671

  the supervisory signal being transmitted together with control information · CPC title