Mobile Terminal and Communication Method
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Abstract
A mobile terminal and communication method capable of increasing the communication continuity and maintaining the communication quality of real-time communications are provided.
The communication method according to the present invention is a method of communicating between a first mobile terminal 1a and a second mobile terminal 1b capable of wireless communication in a plurality of communication networks. First, information required to establish a communication session for performing communications is exchanged via the call control device 3 between the first mobile terminal 1a and the second mobile terminal 1b. Thereafter, a session to establish a communication session is established on the basis of the required information that has been exchanged. Communications are executed between the first mobile terminal 1a and the first mobile terminal 1b by means of the established communication session.
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Citations
38 Claims
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1-14. -14. (canceled)
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15. A mobile terminal capable of wireless communication in a plurality of communication networks, comprising:
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a controller that exchanges information required to establish a communication session for performing communications with a communication partner; and communication means for establishing the communication session on the basis of the required information that has been exchanged, and executing communications with the communication partner through the established communication session, wherein the controller acquires the required information by executing call control with the communication partner via a call control device; the communication means comprises a lower-level layer transmission buffer that is controlled to delete transmitted data held for retransmission in response to the receipt of a confirmation response indicating normal reception from the communication partner; and the controller judges the existence of normally transmitted data based on whether it has been possible to write data from a higher-level layer transmission buffer of the controller to the lower-level layer transmission buffer, and discards the data from the higher-level layer transmission buffer in cases where judgment is made that there are data that have been transmitted normally. - View Dependent Claims (16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30)
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31. A method of communicating between a first mobile terminal and a second mobile terminal capable of wireless communication in a plurality of communication networks, the method comprising:
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an information exchange step of exchanging, via a call control device, information required to establish a communication session for performing communications between the first mobile terminal and the second mobile terminal by means of a controller which the first and second mobile terminals each comprise; a session establishment step of establishing the communication session on the basis of the required information exchanged by the controller; and a communication execution step of executing communications not through the call control device between the first mobile terminal and the second mobile terminal by means of the established communication session, wherein in the communication execution step, the first mobile terminal transmits data stored in a lower-level layer transmission buffer to the second mobile terminal and deletes transmitted data held in the lower-level layer transmission buffer for retransmission in response to the receipt of a confirmation response indicating normal reception from the second mobile terminal; and the controller judges the existence of data that have been transmitted normally based on whether it has been possible to write data from a higher-level layer transmission buffer of the controller to the lower-level layer transmission buffer, and discards the data from the higher-level layer transmission buffer cases where judgment is made that there are data that have been transmitted normally. - View Dependent Claims (32, 33, 34, 35, 36, 37, 38)
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Specification