A resource reservation method, device and system

Abstract

Disclosed in the present invention is a resource reservation method which includes: receiving by a resource coordination entity a first NAT mapping request carrying a source address of a media stream; sending a second NAT mapping request carrying the source address of the media stream to a first mapping network element in a first network domain and receiving a first address returned by the first mapping network element and NAT translated from the source address of the media stream; sending a third NAT mapping request carrying the first address to a second mapping network element in a second network domain, and receiving a second address returned by the second mapping network element and NAT translated from the first address; sending a first resource reservation request carrying the source address or the first address to the first network domain in order to reserve the resource for transmission of the media stream in the first network domain, and sending a second resource reservation request carrying the first address or the second address to the second network domain in order to reserve the resource for transmission of the media stream in the second network domain. The problem of resource reservation in the network domains isolated by multiple NAT devices is solved.

Description

technical field [0001] The present invention relates to the field of communication technologies, and in particular to a resource reservation method, device and system. Background technique [0002] With the intelligentization of operators' pipelines and the needs of users' service experience, end-to-end service guarantee is becoming more and more urgent. This creates a situation where a single media stream traverses multiple network domains. The network domain can be divided according to the scope of the network managed by different operators; it can also be divided according to the different functions of the network managed by the same operator, for example, the access of the wireless fidelity (WIreless Fidelity, WiFi) network to the mobile core network , and then access the IP Multimedia Subsystem (IP Multimedia Subsystem, IMS) network, at this time, the WiFi, the mobile core network and the IMS may be respectively a network domain. Moreover, in different network domains...

AI Technical Summary

Problems solved by technology

[0003] At present, whether it is User Datagram Protocol (User Datagram Protocol, UDP) simple traversal (Simple Traversal of UDP over NATs, STUN) or using relay to traverse NAT (Traversal Using Relay NAT, TURN), only the closest STUN or NAT can be obtained. The address behind the NAT device of the TURN server, which can only solve the resource reservation when there is one NAT device in the network, but cannot solve the resource reservation of each network domain isolated by multiple NAT devices

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