Discussion on several ways to improve the performance of switch network

Communication network has changed from the technology-driven mode of the past to market, business-driven mode, customer-centric, market-oriented, has become the inevitable trend of the next development of fixed network. In order to optimize the existing fixed-line switching network, the  makes it more flexible, safe and efficient on the basis of saving maintenance cost and operating cost. If you can not keep up with the pace of technological trends, the loss of customers can not be avoided.

The following network technologies can greatly improve network performance and security by maintaining lower operating costs:

Number re-positioning technology: number-positioning technology (SNR) is the introduction of intelligent number relocation technology in signaling link layer, make the seventh signaling network intelligent so that when opening numbers and routing-related businesses, there is no need to enhance existing signaling to facilitate and quickly deploy new business.

The Snru (Smart Number relocation unit) is threaded to a signalling link between the signalling point (SP). The device deals with the relevant content of the signal unit of a certain seventh signaling, without involving the MTP2 layer (the 2nd layer of the Messaging section) and the MTP3 function dialogue, nor does it require the functional processing of the business application layer above MTP3 layer. and the number analysis and change is the device on the signaling link layer for the network of new and business-independent function module, complete the number analysis, user signing information to find and the number of parameters to change the content. For those who sign up for the Smart network business, SNRU inserts the business access code of the contracted business into the called number, so that the call is selected to the SSP and the smart network is triggered.

Dynamic stepless route selection: Dynamic stepless route selection (DNHR) is an advanced intelligent route selection mechanism, which can improve network operation security, make use of network existing resources more efficiently, improve network traffic dredging rate and reduce operation and maintenance cost of network.

Although the current long-distance telephone exchange network structure has reached a certain scale, there are enough connections between the nodes, but how to make the business and traffic flow in the network orderly and efficient flow, and according to the network situation reasonable use of circuit resources, has become network operators in optimizing the network, improve network efficiency and reliability of the main considerations. It is an effective solution to introduce advanced intelligent dynamic and stepless route selection mechanism in the telephone network of basic service network.

The P3SB2 switch of Jiangxi Netcom adopts the ADR technology to realize dynamic and stepless route selection. ADR technology is an event-based dynamic stepless route selection technique recommended by ITU-T e.170. The ADR will be implemented according to the plane gradually, the network plane of ADR should be adopted, and the mesh structure must be connected with each other.

The application of dynamic stepless route selection technology, so that the routing table based on the success of each call to establish Automatic updates, set the optimal route for the next call, improve the network access rate, reduce network congestion, increase the flexibility of the network, as well as improve network flexibility and adaptability, improve network security and reliability, This ability is often difficult to achieve only by increasing the redundancy of the network.

ADR is a kind of learning  dynamic  route selection method in this way, in a fully meshed network, the call between the originator and the terminal will automatically select a direct route, if the direct route can not successfully establish the call, the terminal will send a failure reason value  such as circuit busy and so on , and select one as the preferred bypass route with a two-segment link  through a  switch, and if the bypass route can successfully establish a call, the route will be preserved in the database as the preferred circuitous route for the next call. Conversely, if the path fails, the system automatically chooses the next new circuitous route, until the call is established, ADR will update the route that successfully established the call as the preferred circuitous route; If the available routes cannot be selected in all possible circuitous routes, the call fails, and  at this time the original preferred circuitous route remains without updating.

NET sinks Trigger Scenario: The main point of the pure Remittance board trigger scheme is that the business trigger will be completed once in the meeting, no longer need to set up an independent PSR, but requires a certain transformation of the Exchange Bureau, so that it has the function of user property storage to store the user's business attribute data, Including the user's number information and user signed intelligent business information and so on, and complete the trigger to the intelligent network.

In this scenario, all calls, including this Council call, are required to be transferred by the Meeting board. When the call is entered into the meeting board, first of all, check the user and called users (if you have received a call number in the case), determine whether the need to do number translation or the existence of business contract information, and according to the results of the inspection, the main called number for appropriate treatment, and then follow the normal process to complete the call continuation. The conversion between the logical number and the physical number is implemented for the change user to route the call to a new destination. At the same time, for the call with intelligent business contract, by inserting the service access code in front of the called Number to guide the subsequent call processing, routing the call to the SSP, then triggering the corresponding SCP for business processing, so as to solve the user trigger problem. The advantage of this is that the changes on the board will be kept to a minimum, and that other network elements in addition to the network of sinks will not be affected, including the smart network and its operations.

Through the appropriate transformation of the basic network, without SSP to move to the end of the case, you can more thoroughly solve the problem of business triggers, greatly enhance the fixed telephone network to the new business support capabilities, to enrich the business category laid the foundation. In the past, some difficult to achieve personalized business, such as fixed ring tones, double ringing, the main call prepaid, personal number and other business can be easily and flexibly open to any user, neither need to change the existing number of users, at the same time in the use of users do not need to dial a variety of access codes, greatly expand the new business user base; The centralized placement of user data lays the foundation for the smooth development of the number class business.

NGN SoftSwitch Technology: NGN is the next generation network with SoftSwitch technology as its core, it is an important milestone of the development and evolution of traditional telecommunication technology, it is a revolution of network system.

Based on practical considerations, based on the protection of existing fixed network investment, and without affecting the existing business, using SoftSwitch technology, the use of SoftSwitch products, the traditional PSTN network (including Intelligent network) and the exchange of the Internet, to promote the existing telephone network smooth transition to NGN. In the process of the development of the domestic fixed telephone network to NGN, we should first strengthen the tracking of NGN technology, adopt the network scheme of overlay network, build and operate NGN Commercial test network, realize the interworking with the existing PSTN, IP, PLMN and so on, and accumulate the operation experience of NGN business continuously. With the development of NGN network technology, the planning and construction of NGN network Target network is promoted, omni-directional, thorough to the local network optimization transformation, smooth evolution, the local network in the Exchange Module Bureau, access network Equipment transformation Evolution for the MG (Media Gateway), Gateway/Meeting Board and long-distance Bureau evolution for TG (relay gateway), In the seventh signaling Network, STP (signaling switch) evolves into SG (signaling Gateway), establishes the trans-regional SoftSwitch server, realizes the national routing strategy interconnection, and constructs the NGN network target distribution system.