METHOD AND APPARATUS FOR PROVIDING DIFFERENTIATED QUALITY OF SERVICE FOR PACKETS IN A PARTICULAR FLOW

• US 20080123660A1
• Filed: 08/09/2007
• Published: 05/29/2008
• Est. Priority Date: 08/09/2006
• Status: Abandoned Application

• Current Assignee: Interdigital Technology Corporation (InterDigital, Inc.)
• Original Assignee: Interdigital Technology Corporation (InterDigital, Inc.)
• Inventors: Sammour, Mohammed, Chandra, Arty, Terry, Stephen E., Wang, Jin, Livet, Catherine M., Chen, John S.
• Application Number:
  US11/836,554
• Publication Number:
  US 20080123660A1
• Time in Patent Office: Days
• US Class Current: 370/395.21
• CPC Class Codes: H04L 47/10 Flow control; Congestion control
• CPC Class Codes: H04L 47/2408 for supporting different services, e.g. a differentiated services [DiffServ] type of service
• CPC Class Codes: H04L 47/2416 Real-time traffic
• CPC Class Codes: H04L 47/2441 relying on flow classification, e.g. using integrated services [IntServ]
• CPC Class Codes: H04L 47/38 by adapting coding or compression rate
• CPC Class Codes: H04W 28/02 Traffic management, e.g. flow control or congestion control
• CPC Class Codes: H04W 72/543 based on requested quality, e.g. QoS
• CPC Class Codes: H04W 8/04 Registration at HLR or HSS [Home Subscriber Server]

Abstract

Each of a plurality of packets in a particular flow is classified into one of a plurality of quality of service (QoS) classes based on information about each packet. Each packet is then adaptively processed based on the QoS class for each packet. The classification may be performed based on media information included in a session description protocol (SDP) messaging. The classification may also be performed based on a real-time transmit protocol (RTP) payload, an RTP header, a transmission control protocol (TCP) header, a user datagram protocol (UDP) header, and an Internet protocol (IP) header. The packets may be transmitted using multiple system architecture evolution (SAE) radio bearers each of which is used to deliver differentiated QoS requirements. The packets may be mapped to eigen-modes based on the QoS class of each packet such that a packet requiring a higher level of QoS is mapped to a stronger eigen-mode.

Claims

1. A method for providing differentiated quality of service (QoS) on a per-packet basis for frames in a particular flow in a wireless communication system, the method comprising:

receiving a plurality of packets in a flow;

classifying each of the packets into one of a plurality of QoS classes based on information about each of the packets;

indicating a classified QoS class for each of the packets; and

processing each of the packets adaptively based on the indicated QoS class for each packet.

2. The method of claim 1 wherein the QoS classes are defined in terms at least one of a packet loss target, an error protection target, a latency target, maximum transmission delay, a minimum data rate, a maximum data rate, jitter requirements, and bandwidth requirements.

3. The method of claim 1 wherein the QoS classes are defined in terms at least one of a modulation and coding scheme (MCS), transport format combination (TFC) selection parameters, maximum hybrid automatic repeat request (HARQ) transmissions and delay, maximum automatic repeat request (ARQ) transmissions and delay, and a priority.

4. The method of claim 1 further comprising:

segmenting each of the packets into a plurality of segments, each segment having a different QoS requirement; and

classifying each segment into one of the QoS classes based on information about each segment, wherein the segments are processed adaptively based on QoS class assigned to each segment.

5. The method of claim 1 wherein the classification is based on media information included in a session description protocol (SDP) part of session initiation protocol (SIP) messaging.

6. The method of claim 1 wherein the packets are moving picture expert group (MPEG) packets, each of the packets including one of an intra (I) frame, a predictive (P) frame and a bidirectional (B) frame, and the packets including I frame, P frame and B frame are classified differently by examining a format of each MPEG packet.

7. The method of claim 6 wherein MPEG audio packets and MPEG video packets are classified differently.

8. The method of claim 1 wherein the classification is performed based on information in a real-time transmit protocol (RTP) payload.

9. The method of claim 8 wherein the classification is performed based on a picture type field in the RTP payload.

10. The method of claim 8 wherein the classification is performed based on at least one of a moving picture expert group (MPEG) video-specific header, an MPEG-2 video-specific header, and an MPEG audio-specific header included in the RTP payload.

11. The method of claim 1 wherein the classification is performed based on information in a real-time transmit protocol (RTP) header.

12. The method of claim 11 wherein the classification is performed based on at least one of a marker bit and a payload type field in the RTP header.

13. The method of claim 1 wherein the classification is performed based on information in at least one of a transmission control protocol (TCP) header, a user datagram protocol (UDP) header, and an Internet protocol (IP) header.

14. The method of claim 13 wherein the classification is performed based on at least one of a TCP port number, a UDP port number, an IP destination address, an IP source address, an IP protocol field indicating the next level protocol, an IPv4 type of service (TOS) octet, an IPv6 traffic class octet, a packet size, a correlation analysis of properties of information in the packets, and specific frame pattern information.

15. The method of claim 1 wherein the classification is performed by mapping a drop precedence value of a packet to one of the QoS classes.

16. The method of claim 1 wherein the classified QoS class is indicated by adding a tag in each packet.

17. The method of claim 16 wherein the tag is removed before transmitting the packet over an air.

18. The method of claim 16 wherein the tag is transmitted over an air.

19. The method of claim 16 the tag is included in an S1 tunneling protocol level between a Node-B and an access gateway.

20. The method of claim 16 wherein the tag is included in a packet data convergence protocol (PDCP) header.

21. The method of claim 20 wherein the PDCP header includes a transmittable part and a droppable part, and the tag is included in the droppable part, which is not transmitted over the air.

22. The method of claim 16 wherein the tag is included in a differentiated service code point (DSCP) field in an IP packet.

23. The method of claim 16 wherein the tag is included in a QoS field added to the packet in order to explicitly indicate QoS parameters.

24. The method of claim 1 wherein the classified QoS class is indicated by attaching a label indicating a QoS profile with a plurality of QoS attributes for each packet.

25. The method of claim 1 wherein the classified QoS class is indicated by signaling a service primitive.

26. The method of claim 1 wherein at least one of radio link control (RLC) functions, medium access control (MAC) functions, and physical layer functions are adapted on a packet-by-packet basis based on the indicated QoS class of each packet.

27. The method of claim 26 wherein hybrid automatic repeat request (HARQ) retransmission and HARQ process selection for each packet are adapted based on the indicated QoS class of each packet.

28. The method of claim 26 wherein the packets are multiplexed based on the indicated QoS class of each packet.

29. The method of claim 26 wherein at least one of transport format combination (TFC) selection, multiple-input multiple-output (MIMO) stream selection, modulation and coding scheme (MCS) selection, transmit power, radio resource blocks in frequency and time domain for each packet is adapted based on the indicated QoS of each packet.

30. The method of claim 1 wherein the packets are transmitted using multiple system architecture evolution (SAE) radio bearers, each SAE radio bearer being used to deliver differentiated QoS requirements.

31. The method of claim 30 wherein multiple SAE radio bearers are associated with a single SAE bearer.

32. The method of claim 31 wherein the packets are divided into multiple streams based on the indicated QoS class of the packets.

33. The method of claim 30 wherein each of the SAE radio bearers is associated with a different SAE bearer.

34. The method of claim 33 wherein upper layer sequence numbering is instantiated and maintained separately for each of a plurality of SAE radio bearers.

35. The method of claim 34 wherein additional signaling is performed when setting up an SAE bearer and corresponding SAE radio bearers to indicate which SAE radio bearers are sharing the same upper layer sequence number and which SAE radio bearers are not sharing the same upper layer sequence number.

36. The method of claim 1 further comprising:

communicating association information of each QoS class and its corresponding QoS parameters and requirements for adaptive processing of the packets.

37. The method of claim 36 wherein communication of the association information occurs during bearer establishment.

38. The method of claim 36 wherein at least one of non-access stratum (NAS) signaling, access stratum (AS) signaling, radio resource control (RRC) signaling and medium access control (MAC) signaling is used for the communication of the association information.

39. The method of claim 36 wherein a message exchanged during IP bearer establishment is used for the communication of the association information.

40. The method of claim 1 wherein separate radio bearers are used for video packets and audio packets.

41. The method of claim 1 wherein the packets are control packets.

42. The method of claim 1 further comprising:

performing a channel decomposition to determine eigen-modes; and

mapping packets to eigen-modes for transmission over an air based on the QoS class of each packet such that a packet requiring a higher level of QoS is mapped to a stronger eigen-mode.

43. The method of claim 1 further comprising:

mapping a packet requiring a higher level of QoS to a frequency carrier which exhibits a strong eigen-mode, a stronger channel rank, and a higher signal-to-interference and noise ratio (SINR).

44. The method of claim 1 further comprising:

mapping a packet requiring a higher level of QoS to a lower order modulation and a lower coding rate.

45. An apparatus for providing differentiated quality of service (QoS) on a per-packet basis for packets in a particular flow in a wireless communication system, the apparatus comprising:

a classification unit configured to classify each of a plurality of packets in the particular flow into one of a plurality of QoS classes based on information about each packet and indicate a classified QoS class for each of the packets; and

a data processing unit configured to process each of the packets adaptively based on the indicated QoS class for each packet.

46. The apparatus of claim 45 wherein the QoS classes are defined in terms at least one of a packet loss target, an error protection target, a latency target, maximum transmission delay, a minimum data rate, a maximum data rate, jitter requirements, and bandwidth requirements.

47. The apparatus of claim 45 wherein the QoS classes are defined in terms at least one of a modulation and coding scheme (MCS), transport format combination (TFC) selection parameters, maximum hybrid automatic repeat request (HARQ) transmissions and delay, maximum automatic repeat request (ARQ) transmissions and delay, and a priority.

48. The apparatus of claim 45 wherein the classification unit is configured to classify segments of each of the packets into one of the QoS classes based on information about each segment so that the segments are processed adaptively by the data processing unit based on QoS class assigned to each segment.

49. The apparatus of claim 45 wherein the classification is based on media information included in a session description protocol (SDP) part of session initiation protocol (SIP) messaging.

50. The apparatus of claim 45 wherein the packets are moving picture expert group (MPEG) packets, each of the packets including one of an intra (I) frame, a predictive (P) frame and a bidirectional (B) frame, and the packets including I frame, P frame and B frame are classified differently by examining a format of each MPEG packet.

51. The apparatus of claim 50 wherein MPEG audio packets and MPEG video packets are classified differently.

52. The apparatus of claim 45 wherein the classification is performed based on information in a real-time transmit protocol (RTP) payload.

53. The apparatus of claim 52 wherein the classification is performed based on a picture type field in the RTP payload.

54. The apparatus of claim 52 wherein the classification is performed based on at least one of a moving picture expert group (MPEG) video-specific header, an MPEG-2 video-specific header, and an MPEG audio-specific header included in the RTP payload.

55. The apparatus of claim 45 wherein the classification is performed based on information in a real-time transmit protocol (RTP) header.

56. The apparatus of claim 55 wherein the classification is performed based on at least one of a marker bit and a payload type field in the RTP header.

57. The apparatus of claim 45 wherein the classification is performed based on information in at least one of a transmission control protocol (TCP) header, a user datagram protocol (UDP) header, and an Internet protocol (IP) header.

58. The apparatus of claim 57 wherein the classification is performed based on at least one of a TCP port number, a UDP port number, an IP destination address, an IP source address, an IP protocol field indicating the next level protocol, an IPv4 type of service (TOS) octet, an IPv6 traffic class octet, a packet size, a correlation analysis of properties of information in the packets, and specific frame pattern information.

59. The apparatus of claim 45 wherein the classification is performed by mapping a drop precedence value of a packet to one of the QoS classes.

60. The apparatus of claim 45 wherein the classified QoS class is indicated by adding a tag in each packet.

61. The apparatus of claim 60 wherein the tag is removed before transmitting the packet over an air.

62. The apparatus of claim 60 wherein the tag is transmitted over an air.

63. The apparatus of claim 60 the tag is included in an S1 tunneling protocol level between a Node-B and an access gateway.

64. The apparatus of claim 60 wherein the tag is included in a packet data convergence protocol (PDCP) header.

65. The apparatus of claim 64 wherein the PDCP header includes a transmittable part and a droppable part, and the tag is included in the droppable part, which is not transmitted over the air.

66. The apparatus of claim 60 wherein the tag is included in a differentiated service code point (DSCP) field in an IP packet.

67. The apparatus of claim 60 wherein the tag is included in a QoS field added to the packet in order to explicitly indicate QoS parameters.

68. The apparatus of claim 45 wherein the classified QoS class is indicated by attaching a label indicating a QoS profile with a plurality of QoS attributes for each packet.

69. The apparatus of claim 45 wherein the classified QoS class is indicated by signaling a service primitive.

70. The apparatus of claim 45 wherein the data processing unit includes at least one of radio link control (RLC) function, medium access control (MAC) function, and physical layer function that is adapted on a packet-by-packet basis based on the indicated QoS class of each packet.

71. The apparatus of claim 70 wherein hybrid automatic repeat request (HARQ) retransmission and HARQ process selection for each packet are adapted based on the indicated QoS class of each packet.

72. The apparatus of claim 70 wherein the packets are multiplexed based on the indicated QoS class of each packet.

73. The apparatus of claim 70 wherein at least one of transport format combination (TFC) selection, multiple-input multiple-output (MIMO) stream selection, modulation and coding scheme (MCS) selection, transmit power, radio resource blocks in frequency and time domain for each packet is adapted based on the indicated QoS of each packet.

74. The apparatus of claim 45 wherein the packets are transmitted using multiple system architecture evolution (SAE) radio bearers, each SAE radio bearer being used to deliver differentiated QoS requirements.

75. The apparatus of claim 74 wherein multiple SAE radio bearers are associated with a single SAE bearer.

76. The apparatus of claim 75 wherein the packets are divided into multiple streams based on the indicated QoS class of the packets.

77. The apparatus of claim 74 wherein each of the SAE radio bearers is associated with a different SAE bearer.

78. The apparatus of claim 77 wherein upper layer sequence numbering is instantiated and maintained separately for each of a plurality of SAE radio bearers.

79. The apparatus of claim 78 wherein additional signaling is performed when setting up an SAE bearer and corresponding SAE radio bearers to indicate which SAE radio bearers are sharing the same upper layer sequence number and which SAE radio bearers are not sharing the same upper layer sequence number.

80. The apparatus of claim 45 further comprising:

a negotiation unit for communicating association information of each QoS class and its corresponding QoS parameters and requirements for adaptive processing of the packets.

81. The apparatus of claim 80 wherein communication of the association information occurs during bearer establishment.

82. The apparatus of claim 80 wherein at least one of non-access stratum (NAS) signaling, access stratum (AS) signaling, radio resource control (RRC) signaling and medium access control (MAC) signaling is used for the communication of the association information.

83. The apparatus of claim 80 wherein a message exchanged during IP bearer establishment is used for the communication of the association information.

84. The apparatus of claim 45 wherein separate radio bearers are used for video packets and audio packets.

85. The apparatus of claim 45 wherein the packets are control packets.

86. The apparatus of claim 45 further comprising:

a channel decomposition unit for performing a channel matrix decomposition to determine eigen-modes, wherein the data processing unit maps the packets to eigen-modes for transmission over an air based on the QoS class of each packet such that a packet requiring a higher level of QoS is mapped to a stronger eigen-mode.

87. The apparatus of claim 45 wherein the data processing unit is configured to perform spatial frequency scheduling such that a packet requiring a higher level of QoS is mapped to a frequency carrier which exhibits a strong eigen-mode, a stronger channel rank, and a higher signal-to-interference and noise ratio (SINR).

88. The apparatus of claim 45 wherein the data processing unit is further configured to perform modulation and coding scheme (MCS) adaptation such that a packet requiring a higher level of QoS is mapped to a lower order modulation and a lower coding rate.