Header compression of multimedia data transmitted over a wireless communication system

• US 20050259690A1
• Filed: 05/13/2005
• Published: 11/24/2005
• Est. Priority Date: 05/13/2004
• Status: Active Grant

• Current Assignee: Qualcomm, Inc.
• Original Assignee: Qualcomm, Inc.
• Inventors: Garudadri, Harinath, Hsu, Raymond Tah-Sheng, Sagetong, Phoom
• Granted Patent: US 8,089,948 B2
• Time in Patent Office: Days
• US Class Current: 370/477
• CPC Class Codes: H04L 47/36 by determining packet size, e.g. maximum transfer unit [MTU]
• CPC Class Codes: H04L 65/1101 Session protocols
• CPC Class Codes: H04L 65/75 Media network packet handling
• CPC Class Codes: H04L 65/764 at the destination reformatting of additional data in video clients H04N21/4355
• CPC Class Codes: H04L 65/80 Responding to QoS
• CPC Class Codes: H04L 69/04 Protocols for data compression, e.g. ROHC
• CPC Class Codes: H04L 69/161 Implementation details of TCP/IP or UDP/IP stack architecture; Specification of modified or new header fields
• CPC Class Codes: H04L 69/166 IP fragmentation; TCP segmentation
• CPC Class Codes: H04L 69/22 Parsing or analysis of headers
• CPC Class Codes: H04L 69/321 Interlayer communication protocols or service data unit [SDU] definitions; Interfaces between layers
• CPC Class Codes: H04L 9/40 Network security protocols
• CPC Class Codes: H04N 19/102 characterised by the element, parameter or selection affected or controlled by the adaptive coding
• CPC Class Codes: H04N 19/115 Selection of the code volume for a coding unit prior to coding
• CPC Class Codes: H04N 19/124 Quantisation
• CPC Class Codes: H04N 19/152 by measuring the fullness of the transmission buffer
• CPC Class Codes: H04N 19/164 Feedback from the receiver or from the transmission channel
• CPC Class Codes: H04N 19/174 the region being a slice, e.g. a line of blocks or a group of blocks
• CPC Class Codes: H04N 19/61 in combination with predictive coding
• CPC Class Codes: H04N 21/2381 Adapting the multiplex stream to a specific network, e.g. an Internet Protocol [IP] network transmission of MPEG streams over ATM H04L12/5601
• CPC Class Codes: H04N 21/41407 embedded in a portable device, e.g. video client on a mobile phone, PDA, laptop constructional details of equipment or arrangements specially adapted for portable computer application G06F1/1626; arrangements specially adapted for mobile receivers in broadcast systems H04H20/57
• CPC Class Codes: H04N 21/44004 : involving video buffer management, e.g. video decoder buffer or video display buffer
• CPC Class Codes: H04N 21/4788 : communicating with other users, e.g. chatting arrangements for providing for computer conferences, e.g. chat rooms, to substation in data switching networks H04L12/1813; distributed application using peer-to-peer [P2P] networks H04L67/104
• CPC Class Codes: H04N 21/6131 : involving transmission via a mobile phone network wireless downlink channel access H04W74/006
• CPC Class Codes: H04N 21/6181 : involving transmission via a mobile phone network arrangements for providing broadcast or conference services to substation in data switching networks in combination with wireless systems H04L12/189; wireless uplink channel access H04W74/004
• CPC Class Codes: H04N 21/6437 : Real-time Transport Protocol [RTP]
• CPC Class Codes: H04N 21/64707 : for transferring content from a first network to a second network, e.g. between IP and wireless
• 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 28/065 : using assembly or disassembly of packets
• CPC Class Codes: H04W 4/06 : Selective distribution of broadcast services, e.g. multimedia broadcast multicast service [MBMS]; Services to user groups; One-way selective calling services
• CPC Class Codes: H04W 72/044 : based on the type of the allocated resource
• CPC Class Codes: H04W 72/1263 : Mapping of traffic onto schedule, e.g. scheduled allocation or multiplexing of flows
• CPC Class Codes: H04W 80/00 : Wireless network protocols or protocol adaptations to wireless operation
• CPC Class Codes: H04W 84/04 : Large scale networks; Deep hierarchical networks
• CPC Class Codes: H04W 88/02 : Terminal devices
• CPC Class Codes: H04W 88/181 : Transcoding devices; Rate adaptation devices

Abstract

Methods and apparatus are described for improving the transmission of multimedia data over wireless communication channels. These techniques include determining a physical layer packet size of the wireless communication system and determining a maximum size of a compressed header. Then, partitioning an information unit, wherein the size of the partitions are selected such that after a partition is encoded the aggregate size of the encoded partition and the compressed header are the size of the physical layer packet, or less. The techniques can be used for various types of information units, such as multimedia data, variable bit rate data streams, video streams, video teleconference stream, or voice over IP. The techniques can also be used with various over the air interfaces, such as, Global System for Mobile Communication (GSM), General Packet Radio Service (GPRS), Enhanced Data GSM Environment (EDGE), or standards based on CDMA such as TIA/EIA-95-B (IS-95), TIA/EIA-98-C (IS-98), IS2000, HRDP, cdma2000, Wideband CDMA (WCDMA), and others.

Claims

1. A method of transmitting data over a wireless communication system, the method comprising:

determining a physical layer packet size of the wireless communication system;

determining a maximum size of a compressed header; and

partitioning an information unit, wherein the size of the partitions are selected such that after a partition is encoded the aggregate size of the encoded partition and the compressed header are no greater than the physical layer packet size

2. A method as defined in claim 1, wherein the information unit comprises multimedia data.

3. A method as defined in claim 1, wherein the information unit comprises video data.

4. A method as defined in claim 1, wherein the header is compressed in accordance with robust header compression techniques.

5. A method as defined in claim 1, wherein the header is compressed in accordance with zero-byte header compression techniques.

6. A method as defined in claim 1, wherein determining the size of the physical layer packet and the maximum size of the compressed header is determined by negotiation between participants in a communication session.

7. A method as defined in claim 1, wherein the wireless communication system is a CDMA system.

8. A method as defined in claim 1, wherein the wireless communication system is a GSM system.

9. A method as defined in claim 1, wherein the wireless communication system is an EDGE system.

10. A method as defined in claim 1, wherein the wireless communication system is a GPRS system.

11. A method of transmitting multimedia data over a wireless communication system, the method comprising:

determining a set of possible physical layer data packet sizes of available communication channels;

determining a maximum size of a compressed header; and

partitioning a frame of multimedia data into partitions, wherein the size of the partitions are selected so that the aggregate size of a partition plus the maximum size of a compressed header match one of the possible data packet sizes; and

encoding the partition, appending the compressed header and transmitting the encoded partition with the appended header.

12. A method as defined in claim 11, wherein the multimedia data is a variable bit rate stream.

13. A method as defined in claim 11, wherein the multimedia data is a video stream.

14. A method as defined in claim 11, wherein determining the set of possible physical layer data packet sizes and the maximum size of the compressed header is determined by negotiation between participants in a communication session.

15. A method as defined in claim 11, wherein the communication channels are CDMA channels.

16. A method as defined in claim 11, wherein the communication channels are GSM channels.

17. A method as defined in claim 11, wherein the communication channels are EDGE channels.

18. A method as defined in claim 11, wherein the communication channels are GPRS channels.

19. A method as defined in claim 11, wherein the header is compressed in accordance with robust header compression techniques.

20. A method as defined in claim 11, wherein the header is compressed in accordance with zero byte header compression techniques.

21. A wireless communication device comprising:

a processor configured to determine possible data packet sizes of available communication channels and a maximum size of a compressed header; and

an encoder configured to partition multimedia data into partitions, wherein the size of the partitions are selected so that the aggregate size of a partition plus the maximum size of a compressed header match one of the possible data packet sizes, and encoding the partition, appending the compressed header; and

a transmitter configured to transmit the partition with the appended header.

22. A wireless communication device as defined in claim 21, wherein the multimedia data is a data stream.

23. A wireless communication device as defined in claim 21, wherein the multimedia data is a video stream.

24. A wireless communication device as defined in claim 21, wherein the communication channels are CDMA channels.

25. A wireless communication device as defined in claim 21, wherein the communication channels are GSM channels.

26. A wireless communication device as defined in claim 21, wherein the communication channels are GPRS channels.

27. A wireless communication device as defined in claim 21, wherein the communication channels are EDGE channels.

28. A wireless communication device as defined in claim 21, wherein the header is compressed in accordance with robust header compression techniques.

29. A wireless communication device as defined in claim 21, wherein the header is compressed in accordance with zero byte header compression techniques.

30. A computer readable media embodying a method of encoding data, the method comprising:

determining a physical layer packet size of the wireless communication system;

determining a maximum size of a compressed header; and

partitioning an information unit, wherein the size of the partitions are selected such that after a partition is encoded the aggregate size of the encoded partition and the compressed header are no greater than the physical layer packet size.