Method and device for establishing cross-domain session connection

Abstract

The present invention relates to a method and device for establishing a cross-region session connection. The method comprises the steps of receiving a unicast request of establishing a session connection that is sent by a calling user in a local station, wherein the unicast request comprises information of called user equipment; when it is detected that the called user equipment is not in the local station, sending a multicast request to each station of a multicast group, wherein the multicast request comprises an address of the multicast group and the information of the called user equipment; receiving a multicast redirection response that is sent to each station of the multicast group by a station in which the called user equipment is according to the multicast request, wherein the multicast redirection response comprises first route information from the station where the calling user equipment is to the station where the called user equipment is; and establishing the session connection between the calling user equipment and the called user equipment according to the first route information. The method and device are applicable to a mobile distributed communication network, and can establish a service session connection between different management regions.

Description

technical field [0001] The present invention relates to the field of communication technology, in particular to a method and device for establishing a cross-domain session connection. Background technique [0002] In the case of large-scale emergencies (such as natural disasters, wars, etc.) or other reasons that cause the mobile communication infrastructure in a certain area to be unable to provide services, and satellite communication cannot meet the communication service requirements of the area, in order to maintain the communication of the specific area For communication, it is necessary to deploy temporary mobile communication sites to provide emergency communication. In order to meet the requirements of rapid mobile deployment, this kind of emergency mobile communication station is usually loaded on a motor vehicle or erected temporarily, so it can be called a mobile communication station. Due to the limited communication coverage of a single mobile communication sit...

AI Technical Summary

Problems solved by technology

First of all, the unreliable network connection and the loose network structure based on distributed deployment make it impossible to provide address resolution services based on centralized DNS

Secondly, the ever-changing network connection relationship and the uncertainty of composing network sites also greatly increase the difficulty of planning the routing direction parameters for addressing

On the other hand, if it is necessary to further support the user's migration between different management domains in the network, without increasing the user tracking overhead (such as increasing the user location update management function in the mobile communication network), the IMS addressing mechanism is adopted Migrated users will not be found

[0008] To sum up, in the process of establishing a cross-domain session connection, the traditional cross-domain paging mechanism designed based on good network infrastructure (such as the cross-domain paging mechanism of IMS) is not suitable for mobile distributed communication networks

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