Distributed virtual PSTN (Public Switched Telephone Network) switching method based on P2P (Peer-to-Peer) route

Abstract

The invention relates to a distributed virtual PSTN (Public Switched Telephone Network) switching method based on a P2P (Peer-to-Peer) route, comprising the following steps of: upgrading a PSTN switching office into a P2P switching node; setting telephone number prefixes administrated by the PSTN switching office into P2P covering resources by the PSTN switching office and adding to a P2P routing table; when the PSTN switching office accepts a call, if the call is from a P2P switched network, directly transmitting to a terminal user or transmitting the call in a circuit switching way by the PSTN switching office, and if not, sequentially inquiring a full-code covering routing table, an area office covering routing table and an area code covering routing table by the PSTN switching office; if matching, transmitting the call to a matched P2P node switching office, and if not, transmitting the call in the circuit switching way. The invention solves the problem of bottleneck of the traditional PSTN and effectively partially loads telephone traffic to end offices; the invention permits two ways, i.e. circuit switching and P2P switching, to be both in the PSTN, thereby saving the setting of the PSTN and reducing the maintenance cost; and in addition, the invention is easy to move user numbers.

Description

technical field [0001] The invention relates to the upgrading technology of the public service telephone network, in particular to a distributed virtual PSTN switching method based on P2P routing. Background technique [0002] At present, many regions in China are undergoing regional economic integration, such as the Pearl River Delta, the Yangtze River Delta, Beijing and Tianjin, the Bohai Bay Area, the Changzhou-Zhuzhou-Tanjiang Economic Zone, and the Strait Economic Zone. A necessary element of economic integration is communication integration. Communication integration is not a simple unification of telephone numbers. It means that the calls between two different cities in the past are now local calls, so that the traffic volume will increase greatly. The long-distance mainline between the two cities is under great pressure. The traditional method is to increase the capacity of the main line, but this link-based switching method is outdated due to its high cost, and is ...

AI Technical Summary

Problems solved by technology

The traditional method is to increase the capacity of the main line, but this link-based switching method is outdated due to its high cost, and is being eliminated and replaced by softswitching technology

Another evolution method from PSTN to NGN under study is to convert the main long-distance trunk line to IP, which is feasible, but requires a lot of setup and high maintenance costs, in addition, there must be dedicated equipment for redundancy

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