Core network interoperability in a pico cell system

• US 20070177577A1
• Filed: 08/14/2003
• Published: 08/02/2007
• Est. Priority Date: 08/14/2002
• Status: Active Grant

• Current Assignee: Qualcomm, Inc.
• Original Assignee: Qualcomm, Inc.
• Inventors: Zou, Qiuzhen, Kolor, Sergio, Hunter, Andrew, Jain, Nikhil, Green, Michael
• Granted Patent: US 7,733,821 B2
• Time in Patent Office: Days
• US Class Current: 370/352
• CPC Class Codes: H04L 65/104 in the network
• CPC Class Codes: H04L 65/1043 Gateway controllers, e.g. media gateway control protocol [MGCP] controllers
• CPC Class Codes: H04L 65/1069 Session establishment or de-establishment
• CPC Class Codes: H04L 65/1101 Session protocols
• CPC Class Codes: H04L 65/65 Network streaming protocols, e.g. real-time transport protocol [RTP] or real-time control protocol [RTCP]
• CPC Class Codes: H04L 69/16 Implementation or adaptation of Internet protocol [IP], of transmission control protocol [TCP] or of user datagram protocol [UDP]
• CPC Class Codes: H04L 69/164 Adaptation or special uses of UDP protocol
• CPC Class Codes: H04L 9/40 Network security protocols
• CPC Class Codes: H04M 7/1225 Details of core network interconnection arrangements
• CPC Class Codes: H04M 7/125 Details of gateway equipment
• CPC Class Codes: H04W 88/08 Access point devices
• CPC Class Codes: H04W 88/14 Backbone network devices
• CPC Class Codes: H04W 92/12 between access points and access point controllers
• CPC Class Codes: H04W 92/14 between access point controllers and backbone network device

Abstract

In a wireless communication system, a method and apparatus of communicating between at least one base station and a core network is claimed. Signaling messages and voice streams are transported using packet-switched protocols (IP). A CIC field (Circuit Identity Code) is used to identify at least one VoIP streams. The CIC field may be interpreted as a UDP port number for the voice over IP stream. Also, a synchronization source or contributing source filed of a RTP header may be used as the CIC field.

Claims

1. In a wireless communication system, a method of communicating between at least one base station and a core network, the method comprising:

transporting signaling messages and voice streams using packet-switched protocols (IP); and

using a CIC field (Circuit Identity Code) to identify at least one VoIP streams.

2. The method of claim 1, further comprising interpreting the CIC field as a UDP port number for the VoIP stream.

3. The method of claim 2, further comprising using a synchronization source (SSRC) field of a RTP header as the CIC field within the VoIP stream.

4. The method of claim 2, further comprising using a contributing source (CSRC) field of a RTP header as the CIC field within the VoIP stream.

5. The method of claim 2, further comprising defining a new RTP header extension that includes the CIC within the VoIP stream.

6. In a wireless communication system, an apparatus for communicating between at least one base station and a core network, the method comprising:

means for transporting signaling messages and voice streams using packet-switched protocols (IP); and

means for using a CIC field (Circuit Identity Code) to identify at least one VoIP streams.

7. The apparatus of claim 6, further comprising means for interpreting the CIC

field as a UDP port number for the VoIP stream.

8. The apparatus of claim 7, further comprising means for using a synchronization source (SSRC) field of a RTP header as the CIC within the VoIP stream.

9. The apparatus of claim 7, further comprising means for using a contributing source (CSRC) field of a RTP header as the CIC within the VoIP stream.

10. The apparatus of claim 7, further comprising means for defining a new RTP header extension that includes the CIC within the VoIP stream.