Domain-across end-to-end path establishment method

Abstract

The invention discloses a method of cross-domain end-to-end route establishment. A cross-domain interface is equipped between a domain delivery resources control function unit and an opposite end domain delivery resources control function unit. A cross-domain end-to-end route is established by the domain delivery resources control function unit and the opposite end domain delivery resources control function unit by the cross-domain interface, wherein, the cross-domain interface transmits the information relevant to transmission network. The invention can solve the problem of the cross-domain end-to-end route establishment closely relevant to bearing network technology which can not be finished by the business control function and the decision-making function unit.

Description

technical field [0001] The present invention relates to the field of communications, and in particular, to a cross-domain end-to-end path establishment method in Next Generation Networks (NGN). Background technique [0002] At present, how to realize the end-to-end network resource allocation and control mechanism is one of the important issues of network resource admission control in the next generation network. With the technological development and gradual deployment of NGN networks, this issue will become very important. [0003] In the relevant definition of the current ITU-NGN resource allocation and control function subsystem (namely, resource admission control function (RACF), its structure is shown in Figure 1) (mainly Y. RACF (defined in the Y.2111 standard), there are three ways to establish cross-domain end-to-end paths on the transport network. The first is through the service information between the service control function units SCF (service control function)...

AI Technical Summary

Problems solved by technology

[0012] Among the above three methods based on this structure, except for the second one that can fully guarantee the establishment of cross-domain end-to-end paths, the other two methods require Only information closely related to the transport network technology can complete the establishment of the end-to-end path (for example, in a network using MPLS-TE technology) The establishment of the end-to-end path cannot be completed because:

[0013] PD-FE is a functional unit that focuses on policy decisions related to the transport technology independent of the bearer network. It has no information related to the bearer network technology, so it cannot guide the establishment of paths related to the bearer network technology;

[0014] Moreover, the signaling between SCFs is also service-related signaling, which does not have the ability to guide the establishment of paths related to bearer network technology

[0015] In the second method, the transmission network itself establishes a cross-domain end-to-end path with path signaling, and there are problems in scalability and other aspects, which is not conducive to widely deployed

[0016] Moreover, there is no effective solution for establishing a cross-domain end-to-end path

Images