PM5312通信控制器是加拿大PMC公司生产的用于同步通信体系SDH的高性能的通信芯片,可使用在155.52Mb/s和622Mb/s的SDH光纤通信系统。随着Internet网的兴起和IP技术的迅猛发展,异步通信体制over SDH和IP over SDH己经成为当前的热点问题,...PM5312通信控制器是加拿大PMC公司生产的用于同步通信体系SDH的高性能的通信芯片,可使用在155.52Mb/s和622Mb/s的SDH光纤通信系统。随着Internet网的兴起和IP技术的迅猛发展,异步通信体制over SDH和IP over SDH己经成为当前的热点问题,本文首先介绍了PM5312芯片的性能,然后提出了在异步通信体制中的应用的方法。展开更多
Communication networks rely on time synchronization information generated by base station equipment(either the Global Navigation Satellite System receiver or rubidium atomic clock) to enable wireless networking and co...Communication networks rely on time synchronization information generated by base station equipment(either the Global Navigation Satellite System receiver or rubidium atomic clock) to enable wireless networking and communications. Meanwhile, the time synchronization among base stations depends on the Network Time Protocol. With the development of mobile communication systems, the corresponding time synchronization accuracy has increased as well. In this case, the use of sparsely distributed-high-precision synchronization points to synchronize time for an entire network with high precision is a key problem and is the foundation of the enhanced network communication. The current receiver equipment for China's digital synchronous network typically includes dedicated multi-channel GPS receivers for communication; however, with the development of GPS by the USA, network security has been destabilized and reliability is low. Nonetheless, network time synchronization based on Beidou satellite navigation system timing devices is an inevitable development trend for China's digital communications network with the establishment of the independently developed BDS, especially the implementation and improvement of the Beidou foundation enhancement system.展开更多
文摘PM5312通信控制器是加拿大PMC公司生产的用于同步通信体系SDH的高性能的通信芯片,可使用在155.52Mb/s和622Mb/s的SDH光纤通信系统。随着Internet网的兴起和IP技术的迅猛发展,异步通信体制over SDH和IP over SDH己经成为当前的热点问题,本文首先介绍了PM5312芯片的性能,然后提出了在异步通信体制中的应用的方法。
文摘Communication networks rely on time synchronization information generated by base station equipment(either the Global Navigation Satellite System receiver or rubidium atomic clock) to enable wireless networking and communications. Meanwhile, the time synchronization among base stations depends on the Network Time Protocol. With the development of mobile communication systems, the corresponding time synchronization accuracy has increased as well. In this case, the use of sparsely distributed-high-precision synchronization points to synchronize time for an entire network with high precision is a key problem and is the foundation of the enhanced network communication. The current receiver equipment for China's digital synchronous network typically includes dedicated multi-channel GPS receivers for communication; however, with the development of GPS by the USA, network security has been destabilized and reliability is low. Nonetheless, network time synchronization based on Beidou satellite navigation system timing devices is an inevitable development trend for China's digital communications network with the establishment of the independently developed BDS, especially the implementation and improvement of the Beidou foundation enhancement system.
