Method for processing session information of session initiation protocol system and recorded medium thereof

• US 20040095938A1
• Filed: 11/07/2003
• Published: 05/20/2004
• Est. Priority Date: 11/12/2002
• Status: Active Grant

• Current Assignee: Samsung Electronics Co. Ltd.
• Original Assignee: Samsung Electronics Co. Ltd.
• Inventors: Ryu, Jee-Young
• Granted Patent: US 7,412,529 B2
• Time in Patent Office: Days
• US Class Current: 370/392
• CPC Class Codes: H04L 65/1069 Session establishment or de-establishment
• 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: H04L 69/327 in the session layer [OSI layer 5]

Abstract

A method for processing session information of an Internet protocol voice call system using a session initiation protocol (SIP), extracting session information by parsing a SIP Session Protocol header (SIPSP Hdr) only without parsing a session initiation message, by stipulating a session protocol layer in the session initiation protocol and attaching a header of the session protocol layer to the session initiation message, thereby performing communication between a client and a server. The session protocol layer being formed between a UDP (User Datagram Protocol) layer and an SIP application layer.

Claims

1. A method for processing session information of a client performing communication with an arbitrary server in an Internet protocol voice call system using a session initiation protocol, comprising steps of:

generating an arbitrary message for a call processing request to the server;

generating a SIP (Session Initiation Protocol) Session Protocol header including a session identifier and a flag, for indicating a start and an end of a session, by corresponding to a kind of the generated message;

attaching the generated SIP Session Protocol header to the message, and transmitting the message to the server;

parsing the SIP Session Protocol header when the arbitrary message and the SIP Session Protocol header attached to the message are received from the server, and extracting the session identifier and the flag from the SIP Session Protocol header; and

performing a session processing according to the extracted flag and the session identifier.

2. The method of claim 1, wherein in a session initiation protocol stack composed of a physical layer protocol, a data link layer protocol, a network layer protocol, a transport layer protocol, and an application layer protocol, the SIP Session Protocol header is generated by using a session layer protocol implemented between the transport layer protocol and the application layer protocol.

3. The method of claim 1, wherein the SIP Session Protocol header uses 1 octet as a flag for indicating the start and the end of the session, and uses 4 octets as session identifiers of the client.

4. The method of claim 3, wherein the flag assigns 1 bit to a session start flag for displaying the start of the session, assigns 1 bit to a session end flag for displaying the end of the session, and assigns 6 bits reserved for future utility.

5. The method of claim 4, wherein if the session end flag of the SIP Session Protocol header received from the server is set to ‘

1’

, the corresponding session is ended in a certain time after the session end flag is received.

6. The method of claim 4, wherein if the arbitrary message is an INVITE request, the flag sets the session start flag to ‘

1’

, and sets the session end flag to ‘

0’

, and if the arbitrary message is a BYE request, the flag sets the session start flag to ‘

0’

, and sets the session end flag to ‘

1’

, and if the arbitrary message is neither of INVITE request nor the BYE request, the flag sets both the session start flag and the session end flag to ‘

0’

.

7. The method of claim 1, wherein if the session identifiers used for two arbitrary sessions are the same, the two arbitrary sessions each have a unique identity to distinguish the sessions from each other when each session is provided by respective distinguished IPs and ports.

8. A method for processing session information of a server performing communication with an arbitrary client in an Internet protocol voice call system using a session initiation protocol, comprising steps of:

receiving an arbitrary message generated for a call processing request from the client, and receiving a SIP (Session Initiation Protocol) Session Protocol header corresponding to the message, the SIP Session Protocol header received from the client including a session identifier and a flag for indicating a start and an end of a session by;

parsing the received SIP Session Protocol header, and extracting the flag and the session identifier from the corresponding SIP Session Protocol header;

performing a corresponding session processing according to the extracted flag and the session identifier;

generating, by the server, an arbitrary response message to be transmitted to the client for a result of the performed session processing;

generating, by the server, a SIP Session Protocol header corresponding to the generated response message, the SIP Session Protocol header including a session identifier and a flag for indicating a start and an end of a session; and

attaching the generated SIP Session Protocol header to the response message, and transmitting the response message to the client.

9. The method of claim 8, the step of performing the session processing comprising steps of:

determining whether a session according to the extracted client session identifier is generated; and

performing a message processing in accordance with corresponding session information if the according session exists, and generating new arbitrary session information if the according session does not exist.

10. The method of claim 8, wherein in a session initiation protocol stack is composed of a physical layer protocol, a data link layer protocol, a network layer protocol, a transport layer protocol, and an application layer protocol, and the SIP Session Protocol header is generated by including a session layer protocol implemented between the transport layer protocol and the application layer protocol.

11. The method of claim 8, wherein the SIP Session Protocol header uses 1 octet as the flag, the flag indicating the start and the end of the session, and uses 4 octets as session identifiers of clients.

12. The method of claim 11, wherein the flag assigns 1 bit to a session start flag for displaying the start of the session, assigns 1 bit to a session end flag for displaying the end of the session, and assigns 6 bits reserved for future utility.

13. The method of claim 12, wherein if the session start flag is set to ‘

1’

, a new session is generated, and if the session end flag is set to ‘

1’

, the corresponding session is terminated a certain time after receiving the session end flag set to ‘

1’

.

14. The method of claim 12, wherein if an arbitrary message is an INVITE request, the flag sets the session start flag to ‘

1’

, and sets the session end flag to ‘

0’

, and if the arbitrary message is a BYE request, the flag sets the session start flag to ‘

0’

, and sets the session end flag to ‘

1’

, and if the message is neither of INVITE request nor the BYE request, the flag sets both the session start flag and the session end flag to ‘

0’

.

15. The method of claim 8, wherein if the session identifiers used for two arbitrary sessions are the same, the two arbitrary sessions each have a unique identity to distinguish the sessions from each other when each session is provided by respective distinguished IPs and ports.

16. In a recorded medium readable by a digital processing device, when programs of commands executable by the digital processing device are concretely implemented in order to perform a method for processing session information of a client performing communication with an arbitrary server in an Internet protocol voice call system using a session initiation protocol, the method processes the session information of the client, the method comprising steps of:

generating, by the client, a message for a call processing request for transmission to the server;

generating a SIP (Session Initiation Protocol) Session Protocol header, corresponding to the generated message, the SIP Session Protocol header including a session identifier and a flag for indicating a start and an end of a session;

attaching the generated SIP Session Protocol header to the message, and transmitting the message to the server;

parsing, in the server, the corresponding SIP Session Protocol header when the message and the SIP Session Protocol header attached to the message are received, and extracting the flag and the session identifier from the SIP Session Protocol header; and

performing a session processing according to the extracted flag and the session identifier.

17. In a recorded medium readable by a digital processing device, when programs of commands executable by the digital processing device are concretely implemented in order to perform a method for processing session information of a server performing communication with an arbitrary client in an Internet protocol voice call system using a session initiation protocol, the method for processing the session information of the server, comprising the steps of:

receiving an message generated for a call processing request from the client, and receiving a SIP (Session Initiation Protocol) Session Protocol header including session identifier and flag for indicating a start and an end of a session by corresponding to a kind of the generated message;

parsing the received SIP Session Protocol header, and extracting the flag and the session identifier from the corresponding SIP Session Protocol header;

performing a corresponding session processing according to the extracted flag and the session identifier;

generating a response message to be transmitted to the client as a result of the performed session processing;

generating a SIP Session Protocol header including a session identifier and a flag for indicating a start and an end of a session according to the generated response message; and

attaching the generated SIP Session Protocol header to the message, and transmitting the message to the client.