HEADER COMPRESSION ENHANCEMENT FOR BROADCAST/MULTICAST SERVICES

• US 20110182226A1
• Filed: 04/09/2010
• Published: 07/28/2011
• Est. Priority Date: 08/08/2003
• Status: Active Grant

• Current Assignee: Qualcomm, Inc.
• Original Assignee: Qualcomm, Inc.
• Inventors: Veerepalli, Sivaramakrishna, Wang, Jun, Jin, Haipeng, Hsu, Raymond Tah-Sheng
• Granted Patent: US 9,112,714 B2
• Time in Patent Office: Days
• US Class Current: 370/312
• CPC Class Codes: H04L 12/1877 Measures taken prior to transmission
• CPC Class Codes: H04L 12/189 in combination with wireless systems selective distribution or broadcast in wireless communication networks H04W4/06
• CPC Class Codes: H04L 69/04 Protocols for data compression, e.g. ROHC
• 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 72/30 Resource management for broadcast services

Abstract

Methods and apparatus for compression of headers in broadcasting BCMCS services in a wireless communication system are described. Techniques used in BCMCS systems without feedback include sending static context information during BCMCS service initialization for use in a decompressor in a mobile station. Techniques used in BCMCS systems with feedback include receiving feedback from distributed mobile station decompressors and adjusting the broadcasting compressor in response to the feedback. Techniques that reduce the number of operating states in both the compressor and the decompressor are described. Techniques to classify flows so that a reduced number of contexts are used to compress/decompress session packet headers in a push-to-talk service are described.

Claims

1. A method of compressing multicast wireless communications between a group of users, the method comprising:

determining that a destination address in a data stream is a multicast address;

classifying the data stream based on parameters within the data stream; and

establishing a single compressor context for the multicast session.

2. The method of claim 1, wherein classification of the data stream is based on a destination address.

3. The method of claim 1, wherein the classification of the data stream is based on a destination port.

4. The method of claim 1, wherein the classification of the data stream is based on an IP version.

5. The method of claim 1, wherein the classification of the data stream is based on an IP protocol field.

6. The method of claim 1, wherein the multicast session is a Push-To-Talk session.

7. The method of claim 1, wherein a compressor uses the single compressor context to compress data packets send to multiple users.

8. The method of claim 1, wherein a decompressor uses the single compressor context to decompress data packets received from multiple users.

9. An apparatus for compressing multicast wireless communications between a group of users, the apparatus comprising:

a memory; and

a processor for executing a set of instructions stored in the memory, the set of instructions for;

determining that a destination address in a data stream is a multicast address;

classifying the data stream based on parameters within the data stream; and

establishing a single compressor context for the multicast session.

10. The apparatus of claim 9, wherein classification of the data stream is based on a destination address.

11. The apparatus of claim 9, wherein the classification of the data stream is based on a destination port.

12. The apparatus of claim 9, wherein the classification of the data stream is based on an IP version.

13. The apparatus of claim 9, wherein the classification of the data stream is based on an IP protocol field.

14. The apparatus of claim 9, wherein the multicast session is a Push-To-Talk session.

15. The apparatus of claim 9, wherein a compressor uses the single compressor context to compress data packets send to multiple users.

16. The apparatus of claim 9, wherein a decompressor uses the single compressor context to decompress data packets received from multiple users.

17. A storage medium including processor-executable instructions encoded thereon for performing a method for compressing wireless communications between a group of users, the method comprising:

determining that a destination address in a data stream is a multicast address;

classifying the data stream based on parameters within the data stream; and

establishing a single compressor context for the multicast session.

18. An apparatus for compressing multicast wireless communications between a group of users, the apparatus comprising:

means for determining that a destination address in a data stream is a multicast address;

means for classifying the data stream based on parameters within the data stream; and

means for establishing a single compressor context for the multicast session.