Dr. Lingjiang Chen Profile

Dr. Lingjiang Chen

at Huawei Technologies Co Ltd

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Proceedings Article | 7 October 2016 Paper

An IPv6 routing lookup algorithm using weight-balanced tree based on prefix value for virtual router

Lingjiang Chen, Shuguang Zhou, Qiaoduo Zhang, Fenghua Li

Proceedings Volume 9902, 99020Z (2016) https://doi.org/10.1117/12.2262546

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Virtual router enables the coexistence of different networks on the same physical facility and has lately attracted a great deal of attention from researchers. As the number of IPv6 addresses is rapidly increasing in virtual routers, designing an efficient IPv6 routing lookup algorithm is of great importance. In this paper, we present an IPv6 lookup algorithm called weight-balanced tree (WBT). WBT merges Forwarding Information Bases (FIBs) of virtual routers into one spanning tree, and compresses the space cost. WBT’s average time complexity and the worst case time complexity of lookup and update process are both O(logN) and space complexity is O(cN) where N is the size of routing table and c is a constant. Experiments show that WBT helps reduce more than 80% Static Random Access Memory (SRAM) cost in comparison to those separation schemes. WBT also achieves the least average search depth comparing with other homogeneous algorithms.

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