Net Element Control Software System Research On Optical Transmission Equipments

With the development of communication industry, the demand on SDH optical communication network which is the core network is increasing. SDH communication equipments are developed toward high-speed, high-capacity, high reliability, low cost and small size. Network element control processor (NCP) which is the core board in SDH communication equipment played a pivotal role between EMSs and MCUs, therefore, the performance of NCP decided the whole performance of the system. However, there were many problems of the NCP software system, Such as loose framework, inconsistent with the principle of OOP, poor scalability and so on, which resulted in the slow progress in developing new products, poor reliability, poor maintenance of old products and high maintenance costs.The subject rooted in item of"The next-generation enhanced optical transmission equipments PATH4 family"by Shenzhen Zhongxing Telecommunication Equipment Ltd. Corporation (ZTE). In order to solve the problem in past NCP software, as well as satisfy the new requirements in PATH4 family products, the paper designed a new NCP software architecture, that is firstly to construct NCP software as a platform which realizes the smallest core platform functions and than provide the secondary development interfaces for further development so that to improve the development efficiency of new products as well as reduce the maintenance costs.In this paper, we completed the following works:①Discussed the application status of SDH optical transmission equipment at home and abroad, and pointed out that the current existing problems of NCP software.②Analyzed the related theory and technology of NCP software on SDH optical transmission equipment.③Designed the message scheduling framework of NCP software and proposed an efficient architecture, that was using lightweight Job, which was provided by 3G OSS, to replace task as the smallest units of system scheduling, and then combining with multi-threaded asynchronous mechanism to improve parallelism, and also using TLV structure to construct datagram for its easy expanding and flexibility.④Realized the NCP software of the optical SDH transmission equipment, including Adapter module, Main control module, configure module, Timeslot module, OH cross module, and so on. ⑤Completed the PC simulation test and Devices test of the system, as well as the interface test between NCP and MCUs/EMSs. The test result shown that it was valid in system design, and applicable in engineering.