Flexible payload control in data-optimized communication systems

• US 8,493,958 B2
• Filed: 02/20/2007
• Issued: 07/23/2013
• Est. Priority Date: 02/21/2006
• Status: Active Grant

• Current Assignee: Qualcomm, Inc.
• Original Assignee: Qualcomm, Inc.
• Inventors: Attar, Rashid Ahmed Akbar, Bhushan, Naga
• Primary Examiner(s): MATHARU, MANPREET S
• Application Number:
  US11/676,925
• Publication Number:
  US 20070195747A1
• Time in Patent Office: 2,345 Days
• Field of Search: 370/349, 370/342, 370/230, 370/241, 370/252, 370/312, 370/473, 370/474, 455/518, 455/450, 455/452.2
• US Class Current: 370/349
• CPC Class Codes: H04B 7/0452 Multi-user MIMO systems
• CPC Class Codes: H04B 7/0626 Channel coefficients, e.g. channel state information [CSI]
• CPC Class Codes: H04B 7/063 Parameters other than those covered in groups H04B7/0623 - H04B7/0634, e.g. channel matrix rank or transmit mode selection
• CPC Class Codes: H04B 7/0639 Using selective indices, e.g. of a codebook, e.g. pre-distortion matrix index [PMI] or for beam selection
• CPC Class Codes: H04J 13/0044 OVSF [orthogonal variable spreading factor]
• CPC Class Codes: H04L 1/0002 by adapting the transmission rate
• CPC Class Codes: H04L 1/0025 Transmission of mode-switching indication
• CPC Class Codes: H04L 1/0028 Formatting
• CPC Class Codes: H04L 1/06 using space diversity
• CPC Class Codes: H04L 1/1671 the supervisory signal being transmitted together with control information
• CPC Class Codes: H04L 1/1812 Hybrid protocols; Hybrid automatic repeat request [HARQ]
• CPC Class Codes: H04L 25/0204 of multiple channels
• CPC Class Codes: H04L 25/0226 sounding signals per se
• CPC Class Codes: H04L 27/2613 Structure of the reference signals
• CPC Class Codes: H04L 5/0026 Division using four or more dimensions
• CPC Class Codes: H04L 5/0048 Allocation of pilot signals, i.e. of signals known to the receiver
• CPC Class Codes: H04L 5/023 Multiplexing of multicarrier modulation signals multicarrier modulation H04L27/2601
• CPC Class Codes: H04L 5/1438 Negotiation of transmission parameters prior to communication modified according to link quality H04L1/0001
• CPC Class Codes: H04W 28/06 Optimizing the usage of the radio link, e.g. header compression, information sizing , discarding information system modifying transmission characteristic according to link quality by modifying frame length H04L1/0007; dynamic adaptation of the packet size for flow control or congestion control H04L47/365
• CPC Class Codes: H04W 28/18 Negotiating wireless communication parameters
• CPC Class Codes: H04W 48/08 : Access restriction or access information delivery, e.g. discovery data delivery signalling during connection H04W76/00
• CPC Class Codes: Y02D 30/70 : in wireless communication networks

Abstract

An access terminal (AT) and a data-optimized cellular communication radio network (RN) negotiate a set of packet sizes for use on a reverse link between the AT and the RN. The negotiated set of packet sizes may differ from the default set of packet sizes defined in an existing standard, such as 1xEV-DO Revisions A and B. The packet sizes in the negotiated set may be tailored to provide a good fit with an application transmitting data on the reverse link, such as a voice encoder of a voice over Internet Protocol (VoIP) application. The AT and the RN communicate using the negotiated set of packet sizes. The packet sizes of the negotiated set may be mapped to the same reverse rate indicator (RRI) channel codewords as are defined in systems operating under the standard. Packing efficiency is thus increased, and higher capacity for delay-sensitive applications is achieved.

Claims

1. A method of communicating data on a reverse link between a wireless access terminal and a radio network in which packet sizes on the reverse link are typically selected from a default set of standard air interface packet sizes, the method comprising:

determining one or more non-standard air interface packet sizes for the reverse link to at least substantially match a size of an application packet utilized by an application on the wireless access terminal, the one or more non-standard air interface packet sizes differing from the standard air interface packet sizes in the default set;

determining a desired set of air interface packet sizes for the reverse link, the desired set of air interface packet sizes including the one or more non-standard air interface packet sizes;

transmitting from a wireless access terminal to a radio network a request to use the desired set of air interface packet sizes for data traffic on the reverse link;

in response to the step of transmitting the request, receiving at the access terminal from the radio network a negotiated set of air interface packet sizes to be used for the data traffic on the reverse link, wherein the negotiated set of air interface packet sizes is based at least in part on the desired set of air interface packet sizes and includes at least one non-standard air interface packet size adapted to more closely match an application packet size as compared to the standard air interface packet sizes of the default set and thereby reduce or eliminate padding of transmitted air interface packets; and

communicating the data traffic on the reverse link using the negotiated set.

2. The method of claim 1, wherein:

the step of communicating comprises sending from the wireless access terminal to the radio network a plurality of reverse link traffic packets and an indication of packet size associated with each reverse link traffic packet of the plurality of reverse link traffic packets, the indication being selected from the negotiated set, wherein the indication associated with at least one reverse link traffic packet of the plurality of reverse link traffic packets corresponds to the at least one non-standard air interface packet size.

3. The method of claim 2, wherein determining one or more non-standard air interface packet sizes for the reverse link to at least substantially match a size of an application packet utilized by an application on the wireless access terminal comprises:

ascertaining the application packet size to be substantially different from the standard air interface packet sizes of the default set; and

determining a non-standard air interface packet size for the reverse link that at least substantially matches the application packet size to thereby reduce or eliminate padding of transmitted air interface packets and to avoid packet segmentation.

4. The method of claim 3, wherein a number of entries in the desired set is equal to a number of entries in the default set.

5. The method of claim 4, wherein a number of entries in the negotiated set is equal to the number of entries in the default set.

6. The method of claim 3, wherein the negotiated set is identical to the determined set.

7. The method of claim 3, wherein the negotiated set is different from the default set.

8. The method of claim 7, wherein the radio network services at least one access terminal using the default set.

9. The method of claim 3, wherein the application comprises a voice over Internet Protocol (VoIP) application, and the application packet size comprises voice encoder packet size of the VoIP application.

10. The method of claim 2, wherein the indication is transmitted as a codeword on a reverse rate indicator (RRI) channel.

36. The method of claim 1, wherein the default set comprises a set of air interface packet sizes that are each defined in a wireless communications standard employed by the radio network.

11. A wireless access terminal for communicating with a base transceiver station of a radio network in which packet sizes on the reverse link are typically selected from a default set of standard air interface packet sizes, the wireless access terminal comprising:

a receiver configured to receive forward link transmissions from the base transceiver station;

a transmitter configured to send reverse link transmissions to the base transceiver station;

a memory storing program code; and

a controller coupled to the receiver, transmitter, and the memory, wherein the controller is configured to execute the program code to cause the wireless access terminal to perform steps comprising;

determining one or more non-standard air interface packet sizes for the reverse link to at least substantially match a size of an application packet utilized by an application on the wireless access terminal, the one or more non-standard air interface packet sizes differing from the standard air interface packet sizes of the default set;

determining a desired set of air interface packet sizes for the reverse link, the desired set of air interface packet sizes including the one or more non-standard air interface packet sizes;

transmitting to the base transceiver station a request to use the desired set of air interface packet sizes for data traffic on the reverse link; and

in response to the step of transmitting, receiving a negotiated set of air interface packet sizes to be used for the data traffic on the reverse link, wherein the negotiated set of air interface packet sizes is based at least in part on the desired set of air interface packet sizes and includes at least one non-standard air interface packet size adapted to more closely match an application packet size as compared to the standard air interface packet sizes of the default set and thereby reduce or eliminate padding of transmitted air interface packets.

12. The wireless access terminal of claim 11, wherein the controller is further configured to execute the program code to cause the wireless access terminal to send to the radio network a plurality of reverse link traffic packets and a plurality of indications of size of the reverse link traffic packets, each indication of the plurality of indications being associated with a different reverse link traffic packet of the plurality of reverse link traffic packets, said each indication determining the size of the reverse link traffic packet associated with said each indication, said each indication being selected from the negotiated set.

13. The wireless access terminal of claim 12, wherein the one or more non-standard air interface packet sizes for the reverse link are determined by:

ascertaining the application packet size to be substantially different from the standard air interface packet sizes of the default set; and

determining a non-standard air interface packet size for the reverse link that at least substantially matches the application packet size to thereby reduce or eliminate padding of transmitted air interface packets and to avoid packet segmentation.

14. The wireless access terminal of claim 13, wherein a number of entries in the determined set is equal to a number of entries in the default set and at least one indication of the plurality of indications corresponds to the at least one non-standard air interface packet size in the negotiated set.

15. The wireless access terminal of claim 14, wherein the number of entries in the negotiated set is equal to number of entries in the default set.

16. The wireless access terminal of claim 13, wherein the negotiated set is identical to the desired set.

17. The wireless access terminal of claim 13, wherein the negotiated set is different from the desired set of reverse link traffic packet sizes.

18. The wireless access terminal of claim 13, wherein the application comprises a voice over Internet Protocol (VoIP) application, and the application packet size comprises a voice encoder packet size of the VoIP application.

19. The wireless access terminal of claim 13, wherein the controller is further configured to execute the program code to cause the wireless access terminal to send the indications as codewords on a reverse rate indicator (RRI) channel.

37. The wireless access terminal of claim 11, wherein the default set comprises a set of air interface packet sizes that are each defined in a wireless communications standard employed by the radio network.

20. A non-transitory machine-readable medium comprising instructions, the instructions, when executed by at least one processor of a wireless access terminal for communicating with a base transceiver station of a radio network in which packet sizes on the reverse link are typically selected from a default set of standard air interface packet sizes, cause the wireless access terminal to perform operations comprising:

determining one or more non-standard air interface packet sizes for a reverse link to at least substantially match a size of an application packet utilized by an application on the wireless access terminal, the one or more non-standard air interface packet sizes differing from the standard air interface packet sizes of the default set;

determining a desired set of air interface packet sizes for the reverse link, the desired set of air interface packet sizes including the one or more non-standard air interface packet sizes;

transmitting to the radio network a request to use the desired set of air interface packet sizes for data traffic on the reverse link;

in response to the step of transmitting to the radio network the request, receiving a negotiated set of air interface packet sizes to be used for the data traffic on the reverse link, wherein the negotiated set of air interface packet sizes is based at least in part on the desired set of air interface packet sizes and includes at least one non-standard air interface packet size adapted to more closely match an application packet size as compared to the standard air interface packet sizes of the default set to thereby reduce or eliminate padding of transmitted air interface packets; and

communicating the data traffic on the reverse link using the negotiated set.

21. The machine-readable medium of claim 20, wherein:

the step of communicating comprises sending from the wireless access terminal to the radio network a plurality of reverse link traffic packets and a plurality of indications of size of the reverse link traffic packets, each indication of the plurality of indications being associated with a different reverse link traffic packet of the plurality of reverse link traffic packets, said each indication determining the size of the reverse link traffic packet associated with said each indication, said each indication being selected from the negotiated set, at least one indication of the plurality of indications corresponding to the at least one non-standard air interface packet size.

22. The machine-readable medium of claim 21, wherein said one or more non-standard air interface packet sizes are determined by:

ascertaining the application packet size to be substantially different from the standard air interface packet sizes of the default set; and

determining a non-standard air interface packet size for the reverse link that at least substantially matches the application packet size to thereby reduce or eliminate padding of transmitted air interface packets and to avoid packet segmentation.

23. The machine-readable medium of claim 22, wherein the application comprises a voice over Internet Protocol (VoIP) application, and the application packet size comprises a voice encoder packet size of the VoIP application.

24. The machine-readable medium of claim 22, wherein said each indication is transmitted as a codeword on a reverse rate indicator (RRI) channel.

38. The machine-readable medium of claim 20, wherein the default set comprises a set of air interface packet sizes that are each defined in a wireless communications standard employed by the radio network.

25. A method of communicating data on a reverse link between a wireless access terminal and a radio network in which packet sizes on the reverse link are typically selected from a default set of standard air interface packet sizes, the method comprising:

determining a desired set of air interface packet sizes for the reverse link, the desired set being different from the default set of air interface packet sizes of the radio network, wherein the desired set includes at least one non-standard air interface packet size selected to at least substantially match a size of an application packet utilized by an application on the wireless access terminal;

negotiating between a wireless access terminal and a radio network a negotiated set of air interface packet sizes to be used for data traffic on the reverse link, the negotiated set of air interface packet sizes based at least in part on the desired set of air interface packet sizes and including at least one non-standard air interface packet size, wherein the at least one non-standard air interface packet size differs from the standard air interface packet sizes in the default set and is adapted to more closely match an application packet size as compared to the standard air interface packet sizes of the default set to thereby reduce or eliminate padding of transmitted air interface packets; and

communicating the data traffic on the reverse link from the wireless access terminal to the radio network using the negotiated set.

39. The method of claim 25, wherein the default set comprises a set of air interface packet sizes that are each defined in a wireless communications standard employed by the radio network.

26. A method of operating a data-optimized radio network, the radio network being configured to use a default set of packet sizes for data traffic on reverse links, the method comprising:

receiving from a first wireless access terminal a desired set of packet sizes for data traffic on a first reverse link between the radio network and the first wireless access terminal, the desired set being different from the default set and including at least one non-standard air interface packet size selected by the first wireless access terminal to at least substantially match an application packet size utilized by an application of the first wireless access terminal and thereby reduce or eliminate padding of transmitted air interface packets from the first wireless access terminal;

determining a negotiated set of packet sizes for data traffic on the first reverse link, the step of determining being performed based at least in part on the desired set;

transmitting to the first wireless access terminal the negotiated set;

receiving on the first reverse link a plurality of first data traffic packets; and

receiving from the first wireless access terminal a plurality of first indications of size of the first data traffic packets, each first indication of the plurality of first indications being associated with a different first data traffic packet of the plurality of first data traffic packets, said each first indication determining the size of the first data traffic packet associated with said each first indication, said each first indication being selected from the negotiated set, at least one first indication of the plurality of first indications corresponding to a packet size not included in the default set.

27. The method of claim 26, further comprising:

decoding said each first data traffic packet in accordance with the first indication associated with said each first data traffic packet.

28. The method of claim 27, wherein the negotiated set is different from the default set.

29. The method of claim 27, wherein the step of receiving the plurality of indications comprises receiving said each indication as a codeword on a reverse rate indicator (RRI) channel.

30. The method of claim 27, further comprising:

receiving on a second reverse link a plurality of second data traffic packets from a second wireless access terminal; and

receiving from the second wireless access terminal a plurality of second indications of size of the second data traffic packets, each second indication of the plurality of second indications being associated with a different second data traffic packet of the plurality of second data traffic packets, said each second indication determining the size of the second data traffic packet associated with said each second indication, said each second indication being selected from the default set.

31. A method of operating a data-optimized radio network configured to use a default set of packet sizes for data traffic on reverse links, the method comprising:

receiving from a wireless access terminal a requested set of packet sizes for data traffic on a reverse link between the radio network and the wireless access terminal, the requested set being different from the default set and including at least one non-standard air interface packet size selected by the wireless access terminal to at least substantially match an application packet size utilized by an application on the wireless access terminal and thereby reduce or eliminate padding of transmitted air interface packets from the wireless access terminal;

negotiating a negotiated set of packet sizes for data traffic on the reverse link between the radio network and the wireless access terminal;

transmitting to the wireless access terminal the negotiated set;

receiving on the reverse link a plurality of data traffic packets; and

receiving from the wireless access terminal an indicator associated with each data traffic packet of the plurality of data traffic packets for indicating a packet size of the associated data traffic packet, the indicator associated with each data traffic packet being selected from the negotiated set, wherein the indicator that is associated with at least one data traffic packet of the plurality of data traffic packets corresponds to a packet size not included in the default set.

32. A base transceiver station of a data-optimized radio network, the radio network being configured to use a default set of packet sizes for data traffic on reverse links, the base transceiver station comprising:

a receiver configured to receive data;

a transmitter configured to transmit data; and

a processor coupled to the receiver and to the transmitter, wherein the processor is configured to cause the base transceiver station to perform steps comprising;

receiving from a first wireless access terminal a requested set of packet sizes for data traffic on a first reverse link between the base transceiver station and the first wireless access terminal, the requested set being different from the default set and including at least one non-standard air interface packet size selected by the first wireless access terminal to at least substantially match an application packet size utilized by an application of the first wireless access terminal and thereby reduce or eliminate padding of transmitted air interface packets from the first wireless access terminal;

determining a negotiated set of packet sizes for the data traffic on the first reverse link, the step of determining being performed based at least in part on the requested set;

transmitting to the first wireless access terminal the negotiated set;

receiving on the first reverse link a plurality of first data traffic packets; and

receiving from the first wireless access terminal a plurality of first indicators, each first indicator of the plurality of first indicators being associated with a different first data traffic packet of the plurality of first data traffic packets for indicating a size of the first data traffic packet associated with the indicator, wherein each indicator is selected from the negotiated set, and wherein at least one first indicator of the plurality of first indicators corresponds to a first entry in the negotiated set, the first entry not being included in the default set.

33. The base transceiver station of claim 32, wherein the processor is further configured to cause the base transceiver station to decode each first data traffic packet in accordance with the first indicator associated with each first data traffic packet.

34. The base transceiver station of claim 33, wherein the processor is further configured to cause the base transceiver station to perform steps comprising:

receiving on a second reverse link a plurality of second data traffic packets from a second wireless access terminal; and

receiving from the second wireless access terminal a plurality of second indicators, each second indicator of the plurality of second indicators being associated with a different second data traffic packet of the plurality of second data traffic packets for indicating a size of the associated second data traffic packet, each second indicator being selected from the default set.

35. A non-transitory machine-readable medium comprising instructions, the instructions, when executed by at least one processor of a base transceiver station of a data-optimized radio network configured to use a default set of packet sizes for data traffic on reverse links, cause the base transceiver station to perform operations comprising:

receiving from a wireless access terminal a requested set of packet sizes for data traffic on a reverse link between the base transceiver station and the wireless access terminal, the requested set being different from the default set and including at least one non-standard air interface packet size selected by the wireless access terminal to at least substantially match an application packet size utilized by an application of the wireless access terminal and thereby reduce or eliminate padding of transmitted air interface packets from the wireless access terminal;

determining a negotiated set of packet sizes for the data traffic on the reverse link, the step of determining being performed based at least in part on the requested set;

transmitting to the wireless access terminal the negotiated set;

receiving on the reverse link a plurality of data traffic packets; and

receiving from the wireless access terminal a plurality of indicators, each indicator of the plurality of indicators being associated with a different data traffic packet of the plurality of data traffic packets for indicating a size of the data traffic packet associated with the indicator, wherein each indicator is selected from the negotiated set and wherein at least one indicator of the plurality of indicators corresponds to a packet size not included in the default set.