Rate control for wireless communication

Patent metadata

Field	Value
Publication number	US-2016007228-A1
Application number	US-201414480125-A
Country	US
Kind code	A1
Filing date	Sep 8, 2014
Priority date	Jul 3, 2014
Publication date	Jan 7, 2016
Grant date	—

Abstract

Rate control is provided for communicating within a wireless communication network. In some examples, redundant packet information transmitted over separate links, each link having its own independent rate control loop, can result in improvement in packet reliability with fast convergence to a desired error level. In other examples, artificial degradation of a received data stream can be utilized to improve packet reliability, also with fast convergence to the desired error level.

First claim

What is claimed is:

1 . An apparatus for wireless communication, comprising:
at least one processor; and a memory coupled to the at least one processor, wherein the at least one processor is configured to:
transmit a first packet stream on a first link;
transmit a second packet stream on a second link, the second packet stream comprising information that is redundant of information transmitted on the first packet stream;
implement rate control on the first link; and
implement rate control on the second link,
wherein the rate control on the first link is independent of the rate control on the second link and the rate control on the second link is independent of the rate control on the first link.

2 . The apparatus of claim 1 , wherein the information that is redundant of information transmitted on the first packet stream comprises duplicate packets to packets transmitted on the first packet stream.

3 . The apparatus of claim 1 , wherein the information that is redundant of information transmitted on the first packet stream comprises parity information for the information transmitted on the first packet stream.

4 . The apparatus of claim 3 , wherein the at least one processor is further configured to:
encode an initial packet stream; and divide the encoded initial packet stream to generate the first packet stream and the second packet stream.

5 . The apparatus of claim 1 , wherein:
the rate control on the first link comprises setting at least one rate control parameter of the first link in accordance with feedback indicating success or failure of an integrity check of packets corresponding to the first packet stream; and the rate control on the second link comprises setting at least one rate control parameter of the second link in accordance with feedback indicating success or failure of an integrity check of packets corresponding to the second packet stream.

6 . The apparatus of claim 5 , wherein:
the at least one rate control parameter of the first link comprises at least one of a modulation scheme of the first link, a coding scheme of the first link, or a transmission power of the first link; and the at least one rate control parameter of the second link comprises at least one of a modulation scheme of the second link, a coding scheme of the second link, or a transmission power of the second link.

7 . The apparatus of claim 1 , wherein the at least one processor is further configured to:
retransmit packets for the first and second links at a first nominal rate, wherein the first nominal rate is lower than a nominal packet failure rate on the first link and the first nominal rate is lower than a nominal packet failure rate on the second link.

8 . The apparatus of claim 1 , wherein the at least one processor is further configured to:
retransmit a first packet if feedback corresponding to transmission of the first packet on the first stream, and feedback corresponding to transmission of a duplicate version of the first packet on the second stream, both indicate a failure of a respective integrity check.

9 . The apparatus of claim 1 , wherein:
the first link is transmitted over a first carrier frequency; and the second link is transmitted over a second carrier frequency different from the first carrier frequency.

10 . The apparatus of claim 1 , wherein:
the first link is transmitted utilizing a first antenna; and the second link is transmitted utilizing a second antenna different from the first antenna.

11 . A method of wireless communication, comprising:
transmitting a first packet stream on a first link; transmitting a second packet stream on a second link, the second packet stream comprising information that is redundant of information transmitted on the first packet stream; implementing rate control on the first link; and implementing rate control on the second link, wherein the rate control on the first link is independent of the rate control on the second link and the rate control on the second link is independent of the rate control on the first link.

12 . The method of claim 11 , wherein the information that is redundant of information transmitted on the first packet stream comprises duplicate packets to packets transmitted on the first packet stream.

13 . The method of claim 11 , wherein the information that is redundant of information transmitted on the first packet stream comprises parity information for the information transmitted on the first packet stream.

14 . The method of claim 11 , wherein:
the rate control on the first link comprises setting at least one rate control parameter of the first link in accordance with feedback indicating success or failure of an integrity check of packets corresponding to the first packet stream; and the rate control on the second link comprises setting at least one rate control parameter of the second link in accordance with feedback indicating success or failure of an integrity check of packets corresponding to the second packet stream.

15 . The method of claim 11 , further comprising:
retransmitting a first packet if feedback corresponding to transmission of the first packet on the first stream, and feedback corresponding to transmission of a duplicate version of the first packet on the second stream, both indicate a failure of a respective integrity check.

16 . An apparatus for wireless communication, comprising:
at least one processor; and a memory coupled to the at least one processor, wherein the at least one processor is configured to:
receive a packet stream comprising a plurality of packets;
apply an artificial degradation to the received packet stream;
decode the artificially degraded packet stream;
apply an integrity check to the decoded artificially degraded packet stream; and
transmit at least one response indicating success or failure of the integrity check.

17 . The apparatus of claim 16 , wherein the application of the artificial degradation to the received packet stream comprises injecting noise into the received packet stream.

18 . The apparatus of claim 16 , wherein the application of the artificial degradation to the received packet stream comprises puncturing symbols of the received packet stream.

19 . The apparatus of claim 16 , wherein the application of the artificial degradation to the received packet stream comprises using degraded decoding to decode the received packet stream.

20 . The apparatus of claim 16 , wherein the at least one processor is further configured to:
decode the received packet stream to generate receive data associated with a nominal error rate that is lower than a nominal error rate associated with the artificially degraded packet stream.

21 . The apparatus of claim 16 , wherein:
the transmitted at least one response comprises a plurality of responses transmitted at a nominal feedback rate; and the nominal feedback rate is a higher rate than a nominal integrity check feedback rate associated with the received packet stream.

22 . The apparatus of claim 16 , wherein the at least one processor is further configured to:
receive further transmissions corresponding to the packet stream, a modulation and coding scheme of the further transmissions being controlled in accordance with the transmitted response.

23 . The apparatus of claim 16 , wherein the at least one processor is further configured to:
receive further transmissions corresponding to the packet

Assignees

• Qualcomm Inc

Inventors

• Soriaga Joseph
• He Linhai
• Attar Rashid Ahmed Akbar

Classifications

• H04W72/543

  based on requested quality, e.g. QoS · CPC title

• H04L1/0005

  applied to payload information · CPC title

• H04L1/0002 Primary

  by adapting the transmission rate · CPC title

• H04L1/06

  using space diversity · CPC title

• H04L1/04

  using frequency diversity · CPC title