Mobile communication system and packet processing method thereof

• US 20060056381A1
• Filed: 08/24/2005
• Published: 03/16/2006
• Est. Priority Date: 08/25/2004
• Status: Abandoned Application

• Current Assignee: Samsung Electronics Co. Ltd.
• Original Assignee: Samsung Electronics Co. Ltd.
• Inventors: Kim, Dae-Won
• Application Number:
  US11/209,785
• Publication Number:
  US 20060056381A1
• Time in Patent Office: Days
• US Class Current: 370/349
• CPC Class Codes: H04L 65/1101 Session protocols
• CPC Class Codes: H04L 65/1104 Session initiation protocol [SIP]
• CPC Class Codes: H04L 69/22 Parsing or analysis of headers
• CPC Class Codes: H04W 4/10 Push-to-Talk [PTT] or Push-On-Call services
• CPC Class Codes: H04W 72/30 Resource management for broadcast services
• CPC Class Codes: H04W 76/45 for Push-to-Talk [PTT] or Push-to-Talk over cellular [PoC] services
• CPC Class Codes: H04W 80/04 Network layer protocols, e.g. mobile IP [Internet Protocol]
• CPC Class Codes: H04W 80/10 adapted for application session management, e.g. SIP [Session Initiation Protocol] connection management H04W76/00; arrangements for session management H04L67/14

Abstract

A mobile communication system and a packet processing method thereof are provided. A packet data serving node (PDSN) analyzes an Internet Protocol (IP) packet received from a service providing server, and if the IP packet is selected to be transmitted over a short data burst (SDB) channel, marks the IP packet for transmission over the short data burst (SDB) channel and transmits it to a base station/packet control function (BS/PCF).

Claims

1. A packet data serving node (PDSN) comprising an interconnection with a service providing server and a base station/packet control function (BS/PCF),

wherein the PDSN analyzes an Internet Protocol (IP) packet received from the service providing server, and marks the IP packet for transmission over a short data burst (SDB) channel and transmits the marked IP packet to the BS/PCF when the IP packet is selected as a packet to be transmitted over the SDB channel.

2. The PDSN of claim 1, wherein the IP packet comprises a signaling message for session initiation protocol (SIP) session establishment transmitted from the service providing server.

3. The PDSN of claim 2, wherein the signaling message comprises at least one of a session request message and a 200 OK message.

4. The PDSN of claim 1, further comprising:

a storage portion for storing and managing list information of at least one service providing server authenticated to use a service for transmitting over the SDB channel and an effective packet size; and

a controller for extracting and analyzing information related to the IP packet received from the at least one service providing server and comparing the information with a value stored in the storage portion to determine whether the corresponding IP packet is to be transmitted over the SDB channel.

5. The PDSN of claim 4, further comprising:

a marking processor for receiving a packet selected to be transmitted over the SDB channel from the controller and performing generic routing encapsulation (GRE) by marking an indication that the packet is an SDB message to be transmitted over the SDB channel onto the IP packet.

6. The PDSN of claim 4, wherein the storage portion stores at least one of an IP address list of the service providing server, a netmask, and packet length range information in the form of a table.

7. The PDSN of claim 6, wherein the controller determines the IP packet to be transmitted over the SDB channel when the IP address list of the service providing server comprises a source IP address extracted from the received IP packet, and the total length of the received IP packet is within an allowable range of the stored packet length range information.

8. The PDSN of claim 6, wherein the controller determines the IP packet to be transmitted over the SDB channel when the IP address list of the service providing server comprises a source IP address extracted from the received IP packet, and an IP packet header of the received IP packet comprises an effective option field value.

9. The PDSN of claim 8, wherein the option field comprises a data field which comprises information indicating whether the IP packet is to be transmitted over the SDB channel.

10. A mobile communication system, comprising:

a service providing server for inserting indication information for transmitting an Internet Protocol (IP) packet received from the Internet over a short data burst (SDB) channel into a header of the IP packet and transmitting the IP packet; and

a packet data serving node (PDSN) for receiving the IP packet from the service providing server, analyzing the IP packet, marking the IP packet to be transmitted over the SDB channel when the IP packet is to be transmitted over the SDB channel, and transmitting the marked IP packet to a base station/packet control function (BS/PCF).

11. The system of claim 10, wherein the IP packet comprises a signaling message for session initiation protocol (SIP) session establishment transmitted from the service providing server.

12. The system of claim 10, wherein the service providing server sets the indication information in an option field of the received header of the IP packet.

13. The system of claim 12, wherein the option field comprises a data field which comprises information indicating whether the IP packet is to be transmitted over the SDB channel.

14. The system of claim 10, wherein the PDSN stores at least one of an IP address list of the service providing server, and information on an allowable range of a total packet length.

15. The system of claim 14, wherein the PDSN determines the IP packet to be transmitted over the SDB channel when the IP address list of the service providing server comprises a source IP address extracted from the received IP packet, and the total length of the received IP packet is within the allowable range of the total packet length.

16. The system of claim 14, wherein the PDSN determines the IP packet to be transmitted over the SDB channel when the IP address list of the service providing server comprises a source IP address extracted from the received IP packet, and the header of the received IP packet comprises an effective option field value.

17. The system of claim 10, wherein the service providing server comprises an IP packet producer which produces an IP packet comprising a signaling message, and wherein the indication information for transmitting the IP packet over the SDB channel is set in a predetermined field of the IP packet when the signaling message for session establishment is received from a mobile station via an IP network.

18. A service providing server producing an IP packet comprising a signaling message for session establishment, wherein indication information for transmitting the IP packet over an SDB channel is set in a predetermined field of the IP packet when the signaling message is received from a mobile station via an IP network.

19. The server of claim 18, wherein an option field of the IP packet header comprises the indication information.

20. A packet processing method of a mobile communication system, comprising the steps of:

inserting indication information for transmitting an IP packet over a short data burst (SDB) channel into a header of the IP packet comprising signaling messages for session establishment;

transmitting the IP packet;

receiving the IP packet from a service providing server; and

analyzing the indication information to determine whether the IP packet is to be transmitted over the SDB channel.

21. The method of claim 20, further comprising the steps of marking the IP packet to be transmitted over the SDB channel and transmitting the IP packet to a base station/packet control function (BS/PCF) when the received IP packet is selected to be transmitted over the SDB channel.

22. The method of claim 21, wherein the step of marking the IP packet comprises, when the IP packet is encapsulated in a generic routing encapsulation (GRE) header, indicating in a predetermined field of the GRE header indicates that the IP packet comprises a SDB message to be transmitted over the SDB channel when the IP packet is selected to be transmitted over the SDB channel.

23. The method of claim 20, wherein the PDSN stores at least one of an IP address list of the service providing server, and information on an allowable range of a total packet length.

24. The method of claim 23, wherein the step of analyzing the indication information comprises the steps of:

determining whether the IP address list of the service providing server comprises a source IP address extracted from the received IP packet; and

determining that the IP packet is to be transmitted over the SDB channel when a total length of the received IP packet is within the allowable range of the total packet length.

25. The method of claim 23, wherein the step of analyzing the indication information comprises the steps of:

determining whether the IP address list of the service providing server comprises a source IP address extracted from the received IP packet; and

determining that the IP packet to be transmitted over the SDB channel when the IP address list comprises the IP packet and a header of the received IP packet comprises an effective option field value.

26. The method of claim 23, wherein the step of analyzing the indication information comprises the steps of:

determining whether the IP address list of the service providing server comprises a source IP address extracted from the received IP packet;

determining whether a header of the received IP packet comprises an option field when the IP address list comprises the IP packet; and

determining the IP packet to be transmitted over the SDB channel when the header of the received IP packet comprises an option field and the option field comprises an effective value.

27. The method of claim 26, further comprising the step of ignoring the IP packet when the option field does not have an effective value.

28. The method of claim 26, further comprising the steps of:

determining whether a total length of the received IP packet is within the allowable range of the total packet length when the header of the received IP packet does not have an option field; and

determining that the IP packet is to be transmitted over the SDB channel when the total length of the received IP packet is within the allowable range of the total packet length.

29. A packet processing method of a mobile communication system, the method comprising the steps of:

storing an Internet Protocol (IP) address list of a service providing server and an allowable range of a total packet length;

inserting indication information for transmitting an IP packet over a short data burst (SDB) channel into a header of the IP packet comprising signaling messages for session establishment;

transmitting the IP packet;

extracting a source IP address from the IP packet received from the service providing server;

determining whether the source IP address matches a stored IP address of the service providing server;

marking the IP packet to be transmitted over the SDB channel; and

transmitting the marked IP packet to a base station/packet control function (BS/PCF) when the IP packet is selected to be transmitted over the SDB channel.

30. A packet processing method of a PDSN, the method comprising the steps of:

reading out a source Internet Protocol (IP) address from a header of an IP packet received from the Internet;

determining whether a previously stored list of a service providing server comprises an address matching the source IP address;

determining whether the header of the IP packet comprises an option field when the previously stored list of a service providing server comprises the address matching the source IP address;

determining whether a value of the option field is effective when the header of the IP packet comprises the option field; and

marking an indicator for transmitting over an SDB channel onto a predetermined field of a generic routing encapsulation (GRE) header when the value of the option field is effective.

31. The method of claim 30, further comprising the steps of:

determining whether a total packet length is within an allowable range stored in the previously stored list of the service providing server when the header of the IP packet does not have the option field; and

marking the indicator for transmitting over the SDB channel onto the predetermined field of the GRE header when the total packet length is within the allowable range.

32. The method of claim 31, wherein the IP packet is transmitted in the same manner as a standard IP packet without marking the indicator onto the predetermined field of the GRE header when the total packet length is not within the allowable range.