Communication method, device and system between sub networks

Abstract

The embodiment of the invention discloses a communication method, a device and a system between sub networks, which relate to the field of communication. In order to improving the experience quality of customers only using non-IMS network business in the network with the coexistence of the IMS network and the traditional network, the invention provides the technical scheme that the method comprises the following steps: receiving business request information sent by a first gateway connected with the first sub network; respectively obtaining the external interface types of the first sub network and the second sub network; and respectively sending direct transmission indication information to the first gateway or the second gateway connected with the second sub network to be used for obtaining mutual direct transmission channels of the communication business by the first gateway and the second gateway according to the direct transmission indication information when that the communication business of the first sub network and the second sub network is the non-IMS network business is determined and that the external interface types of the first sub network and the second sub network are identical is determined. The invention is applicable to the IMS network communication.

Description

technical field [0001] The present invention relates to the communication field, in particular to a communication method, device and system between subnets. Background technique [0002] With the development of telecommunication technology, the IMS (IP Multimedia Subsystem, IP Multimedia System, Internet Protocol Multimedia System) network based on all IP (Internet Protocol, Internet Protocol) transmission will gradually replace the traditional network. Because the replacement process will be a long and gradual evolution process, the IMS network will coexist with the traditional network for a long time. Based on various factors such as cost, income and operational risk, the IMS network is used as the core network of the operator, and other traditional networks are used as subnets, and all communication between subnets is under the unified control of the IMS network. [0003] The following takes PSTN (Public Switched Telephone Network, Public Switched Telephone Network, Publ...

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Problems solved by technology

[0004] In the process of realizing the present invention, the inventor found that there are at least the following problems in the prior art: customers in traditional networks carry out communication services, even if the communication between the calling and called users only involves non-IMS network services, and does not involve the internal IMS network business processing and resources, the communication process between the calling and called users is still similar to the above-mentioned process of establishing a connection, and multiple protocol adaptations and conversions between the IMS network and the traditional network are required. Compared with the direct mutual communication of the Internet protocol, the processing process is cumbersome and the call delay is long, which leads to the decline of the experience quality of customer communication between traditional networks. At the same time, this kind of customer communication between traditional networks also consumes a large amount of IMS network processing capacity.

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