Session initialization protocol (SIP)-based file transmission method, terminal and application server

Abstract

The invention relates to the technical field of communication, in particular to a session initialization protocol (SIP)-based file transmission method, which comprises the following steps that: a first terminal locally searches for a file identifier corresponding to a file to be transmitted, wherein the file identifier is used for indicating the file to be transmitted stored in an application server (AS); and when finding the file identifier, the first terminal transmits an SIP-based first file transmission request comprising the file identifier to the AS, so that the AS locally acquires the file to be transmitted, and transmits the file to be transmitted to a second terminal through a message session relay protocol (MSRP). By the method, a process of transmitting the file to be transmitted to the AS by a calling terminal is eliminated, network traffic consumed by the calling terminal is reduced, time for the calling terminal to transmit the file to be transmitted to a called terminal is shortened, and the file transmission performance of the terminal is improved.

Description

technical field [0001] The invention relates to the field of communication technology, in particular to a SIP-based file transmission method, a terminal and an application server, and improves the performance of terminal file transmission. Background technique [0002] In the RCS service based on the IMS network, the file transfer is realized by combining SIP and MSRP. Among them, the calling and called terminals and the AS establish a signaling session through the SIP INVITE message, and perform media layer session negotiation through the SDP information carried in the SIP message, and finally establish an MSRP channel for media transmission. [0003] In the existing RCS specification, for file transmission, each time the calling terminal transmits a file to the called terminal, the file needs to be transmitted to the application server AS, and then the application server AS transmits the file to the called terminal. [0004] The inventor found that the above-mentioned pri...

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Problems solved by technology

[0004] The inventor found that the above-mentioned prior art has at least the following disadvantages: when the calling terminal needs to transmit the same file to multiple called terminals, the calling terminal needs to transmit the file to each called terminal in turn, causing the calling terminal to It needs to consume a lot of network traffic and time to complete the file transfer to each called terminal, which reduces the performance of the calling terminal to transfer files

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