关键词: 缓存管理, 测井网络, 路由查找, 状态机, 时延

Abstract:

A lightweight router using optimized methods is proposed to meet the requirements of realtime and reliable transmission in logging networks. In the router, the pointtopoint protocol is simplified for three states and five events in state machine, and the number of escape characters will be reduced to improve transmission efficiency. The memory of link frame is preallocated with the maximum header of protocol data unit to decrease movement of buffered data. A lowcomplexity method based on linear static routing table is designed to fast lookup. The forwarding engine driven by direct memory access controller in hardware timer can fast process Internet protocol packet. Experiment shows that the forwarding delay and jitter is low and the router is stable and efficient for logging networks.

Key words: buffer management, logging networks, route lookup, state machine, time delay