Method, device and system for sending a reset message sequence number during switching

Abstract

A method of sending reset message sequence number is provided. During a connected state handoff of an access terminal (AT) between a source access network (AN) and a target AN, the source AN sends a reset message sequence number of the AT to the target AN. The source AN adds the reset message sequence number of the AT to the message sent to the target AN. Thereby, the problem in the existing systems that, the source AN cannot send the reset message sequence number of the AT to the target AN, and thus the target AN cannot perform a reset process on the AT when the AT is switched from the source AN to the target AN is thus solved. An access network (AN) and a communication system are also provided.

1 . A method for sending a reset message sequence number, comprising:
 initiating a connected state handoff of an access terminal (AT) between a source access network (AN) and a target AN; and   sending a reset message sequence number of the AT from the source AN to the target AN.   
   
   
       2 . The method according to  claim 1 , wherein the source AN sends an A16-Session Transfer Request Message to the target AN, and the A16-Session Transfer Request Message comprises the reset message sequence number of the AT. 
   
   
       3 . The method according to  claim 2 , wherein an Information Element of the A16-Session Transfer Request Message comprises a session state information (SSI), and the SSI carries the reset message sequence number of the AT. 
   
   
       4 . The method according to  claim 1 , wherein the source AN sends an A16-Session Transfer Complete Message to the target AN, and the A16-Session Transfer Complete Message comprises the reset message sequence number of the AT. 
   
   
       5 . The method according to  claim 4 , wherein an Information Element of the A16-Session Transfer Complete Message comprises a session state information (SSI), and the SSI carries the reset message sequence number of the AT. 
   
   
       6 . The method according to  claim 4 , wherein the A16-Session Transfer Complete Message comprises a new Information Element, and the Information Element carries the reset message sequence number of the AT. 
   
   
       7 . The method according to  claim 1 , wherein the target AN updates the reset message sequence number by adding one (1) to the reset message sequence number, and performs a reset process on the AT according to the updated reset message sequence number. 
   
   
       8 . A communication device, comprising:
 a processing unit, adapted to confirm a connected state handoff of an access terminal (AT) to a target access network (AN), and add a reset message sequence number of the AT into a message sent to the target AN; and   a communication unit, adapted to send the reset message sequence number of the AT to the target AN during the connected state handoff of the AT.   
   
   
       9 . The communication device according to  claim 8 , wherein the processing unit is further adapted to add the reset message sequence number of the AT into an A16-session Transfer Request Message. 
   
   
       10 . A communication system, comprising:
 a source access network (AN) adapted to initiate a connected state handoff of an access terminal (AT) and transmit a reset message sequence number of the access terminal (AT) during the connected state handoff of the AT; and   a target AN adapted to receive the message sequence number and perform a reset process on the AT according to the message sequence number.   
   
   
       11 . The communication system according to  claim 10 , wherein the source AN is further adapted to add the reset message sequence number of the AT into an A16-Session Transfer Request Message sent to the target AN. 
   
   
       12 . The communication system according to  claim 10 , wherein the target AN is further adapted to update the reset message sequence number by adding one (1) to the reset message sequence number sent, and then perform a reset process on the AT according to the updated reset message sequence number. 
   
   
       13 . The communication device according to  claim 9 , wherein the processing unit is further adapted to add the reset message sequence number of the AT into an A16-session Transfer Complete Message sent to the target AN. 
   
   
       14 . The communication system according to  claim 11 , wherein the source AN is further adapted to add the reset message sequence number of the AT into an A16-Session Transfer Complete Message sent to the target AN.