Scalable Name Lookup in NDN Using Effective Name Component Encoding

—Name-based route lookup is a key function for Named Data Networking (NDN). The NDN names are hierarchical and have variable and unbounded lengths, which are much longer than IPv4/6 address, making fast name lookup a challenging issue. In this paper, we propose an effective Name Component Encoding (NCE) solution with the following two techniques: (1) A code allocation mechanism is developed to achieve memory-efficient encoding for name components; (2) We apply an improved State Transition Arrays to accelerate the longest name prefix matching and design a fast and incremental update mechanism which satisfies the special requirements of NDN forwarding process, namely to insert, modify, and delete name prefixes frequently. Furthermore, we analyze the memory consumption and time complexity of NCE. Experimental results on a name set containing 3,000,000 names demonstrate that compared with the character trie NCE reduces overall 30% memory. Besides, NCE performs a few millions lookups ...

• Type: Journal
• Year: 2012
• Where: ICDCS
• Authors: Yi Wang, Keqiang He, Huichen Dai, Wei Meng, Junchen Jiang, Bin Liu, Yan Chen
• Keywords: Distributed And Parallel Computing, ICDCS 2012, Memory Consumption, State Transition, Time Complexity