RATE CONTROL FOR WIRELESS COMMUNICATION

• US 20160007228A1
• Filed: 09/08/2014
• Published: 01/07/2016
• Est. Priority Date: 07/03/2014
• Status: Active Grant

• Current Assignee: Qualcomm, Inc.
• Original Assignee: Qualcomm, Inc.
• Inventors: Soriaga, Joseph, He, Linhai, Attar, Rashid Ahmed Akbar
• Granted Patent: US 9,717,015 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: H04B 1/123 using adaptive balancing or compensation means adaptive filter circuits and algorithms H03H
• CPC Class Codes: H04L 1/0002 by adapting the transmission rate
• CPC Class Codes: H04L 1/0003 by switching between different modulation schemes
• CPC Class Codes: H04L 1/0005 applied to payload information
• CPC Class Codes: H04L 1/0036 arrangements specific to the receiver
• CPC Class Codes: H04L 1/04 using frequency diversity
• CPC Class Codes: H04L 1/06 using space diversity
• CPC Class Codes: H04L 1/08 by repeating transmission, e.g. Verdan system H04L1/1858 and H04L1/189 take precedence
• CPC Class Codes: H04L 1/1816 with retransmission of the same, encoded, message
• CPC Class Codes: H04L 1/1819 with retransmission of additional or different redundancy
• CPC Class Codes: H04L 1/1845 Combining techniques, e.g. code combining
• CPC Class Codes: H04W 28/0257 the individual bearer or channel having a maximum bit rate or a bit rate guarantee
• CPC Class Codes: H04W 28/12 using signalling between network elements
• CPC Class Codes: H04W 72/0473 the resource being transmission power
• CPC Class Codes: H04W 72/543 based on requested quality, e.g. QoS
• CPC Class Codes: H04W 88/06 adapted for operation in multiple networks or having at least two operational modes, e.g. multi-mode terminals
• CPC Class Codes: Y02D 30/50 in wire-line communication networks, e.g. low power modes or reduced link rate

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.

Claims

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 stream, a transmit power of the further transmissions being controlled in accordance with the transmitted response.

24. A method of wireless communication, comprising:

receiving a packet stream comprising a plurality of packets;

applying an artificial degradation to the received packet stream;

decoding the artificially degraded packet stream;

applying an integrity check to the decoded artificially degraded packet stream; and

transmitting at least one response indicating success or failure of the integrity check.

25. The method of claim 24, wherein the application of the artificial degradation to the received packet stream comprises injecting noise into the received packet stream.

26. The method of claim 24, wherein the application of the artificial degradation to the received packet stream comprises puncturing symbols of the received packet stream.

27. The method of claim 24, wherein the application of the artificial degradation to the received packet stream comprises using degraded decoding to decode the received packet stream.

28. The method of claim 24, further comprising:

decoding 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.

29. The method of claim 24, further comprising:

receiving further transmissions corresponding to the packet stream, a modulation and coding scheme of the further transmissions being controlled in accordance with the transmitted response.

30. The method of claim 24, further comprising:

receiving further transmissions corresponding to the packet stream, a transmit power of the further transmissions being controlled in accordance with the transmitted response.