Binary protocol for session initiation in a wireless communications system

• US 7,324,443 B2
• Filed: 06/17/2002
• Issued: 01/29/2008
• Est. Priority Date: 06/17/2002
• Status: Expired due to Fees

• Current Assignee: Lucent Technologies, Inc. (Nokia Corporation)
• Original Assignee: Lucent Technologies, Inc. (Nokia Corporation)
• Inventors: Chuah, Mooi Choo, Ji, Tingfang, Sand, Donna Michaels, Vollman, David Walter, Noel, Paul A.
• Primary Examiner(s): Pham; Chi
• Assistant Examiner(s): Hyun; Soon D.
• Application Number:
  US10/172,505
• Publication Number:
  US 20030231626A1
• Time in Patent Office: 2,052 Days
• Field of Search: None
• US Class Current: 370/230
• CPC Class Codes: H04L 65/1101 Session protocols
• CPC Class Codes: H04L 65/1104 Session initiation protocol [SIP]
• CPC Class Codes: H04L 65/70 Media network packetisation
• CPC Class Codes: H04L 67/14 Session management for real-time applications in data packet communications networks H04L65/1066
• CPC Class Codes: H04L 69/329 in the application layer [OSI layer 7]
• CPC Class Codes: H04L 9/40 Network security protocols
• CPC Class Codes: H04M 7/123 where the packet-switched network is an Internet Protocol Multimedia System-type network
• CPC Class Codes: H04M 7/128 Details of addressing, directories or routing tables
• 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 80/00 Wireless network protocols or protocol adaptations to wireless operation

Abstract

A method, template, protocol, apparatus, system, and computer software for implementing a binary protocol for session initiation in a wireless communications system. The method for creating, modifying or terminating an IP multimedia session among one or more binary session initiation protocol (B-SIP) entities includes providing a flexible template with at least one mandatory field and at least one optional field, wherein the flexible template has fixed and variable length fields, representing a message type with a template id, and maintaining session specific information in a cache. The message template for creating, modifying or terminating an IP multimedia session among one or more binary session initiation protocol (B-SIP) entities, includes at least one mandatory field and at least one optional field, at least one fixed length field and at least one variable length field, wherein each of said at least one variable length fields is preceded by a length field and each of said at least one optional fields is preceded by an identifier, wherein said at least one mandatory field precedes said at least one optional field and said at least one fixed length field precedes said at least one variable length field.

Claims

1. A method for creating, modifying or terminating an IP multimedia session among one or more binary session initiation protocol (B-SIP) entities, comprising:

providing a flexible template with at least one mandatory field and at least one optional field, wherein the flexible template has fixed and variable length fields;

representing a message type with a template id;

creating, modifying, or terminating the IP multimedia session among the one or more B-SIP entities using the flexible template; and

maintaining session specific information in a cache;

wherein,

the flexible template corresponding to SIP respond messages eliminates repeat information.

2. The method of claim 1, wherein fixed length fields are provided at the beginning of the flexible template and a variable length field is indicated by delimiter or length coding.

3. The method of claim 1, wherein each of the at least one optional fields is preceded with a header ID.

4. The method of claim 1, wherein a service provider address is assigned short binary IDs and stored in a B-SIP memory.

5. The method of claim 1, wherein each B-SIP entity is initialized with a unique user ID and a number of group IDs to which the B-SIP entity belongs.

6. The method of claim 5, wherein when a B-SIP entity is a caller, the unique user ID is used in place of the address of record of the caller if a message is sent to a capable server.

7. The method of claim 5, wherein

when a B-SIP entity is a callee, an address of record is used in place of the unique user ID.

8. The method of claim 5, when a B-SIP entity is a caller, the unique user ID is used in place of the address of record of the caller if a message is sent to a capable B-SIP server and when a B-SIP entity is a callee, an address of record is used in place of the unique user ID.

9. The method of claim 1, wherein the capable B-SIP server implements user ID look up.

10. The method of claim 1, wherein the flexible template includes a domain name field and an IP address field and the domain name field and the IP address field are represented in binary format.

11. The method of claim 10, wherein the domain name field and the IP address field are represented by four bytes for an IPv4 address.

12. The method of claim 1, wherein the flexible template includes at least one field containing a numerical value and the numerical value is encoded in binary format.

13. The method of claim 1, wherein all fields of the flexible template are binary coded or binary represented.

14. The method of claim 13, wherein the fields of the flexible template that are binary coded or binary represented include media description, media load profile ID, encoding type, and sampling rate.