OBF: A Guaranteed IP Lookup Performance Scheme for Flexible IP Using One Bloom Filter

Shi-Hai Liu, Wanming Luo, Xu Zhou, Bin Yang, YiHao Jia, Zhe Chen, Sheng Jiang
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Abstract

The conventional IP address is designed with fixed length and lacking of extensibility, while the demand for addresses varies greatly in different scenarios. Flexible IP (FlexIP), as a variable length IP address, proactively makes address structure flexible enough to adapt to various network cases. Different lengths of the addresses could be used to accommodate different demands. However, how to efficiently addressing with length variable addresses is still a problem to be solved. The Bloom filter-based addressing scheme appears to be an excellent candidate with the possibility of compact storage and efficient member query. In this paper, we propose an OBF-based scheme using only one Bloom filter. While keeping nearly the same false positive ratio as the conventional Bloom filter-based scheme, the OBF-based scheme significantly improves the addressing efficiency. OBF-based has two key features, one is that it achieves constant, yet small IP lookup time, and another is that it is insensitive to the length of the address. Simulation results show that the addressing scheme we proposed is more suitable for FlexIP addressing than well known schemes.
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OBF:使用一个Bloom过滤器的灵活IP的保证IP查找性能方案
传统的IP地址设计固定长度,缺乏可扩展性,而不同场景对地址的需求差异很大。灵活IP (Flexible IP)是一种可变长度的IP地址,主动使地址结构灵活,以适应各种网络情况。不同长度的地址可以用来满足不同的需求。然而,如何有效地对变长地址进行寻址仍然是一个有待解决的问题。基于Bloom过滤器的寻址方案具有紧凑存储和高效成员查询的可能性,是一个很好的候选方案。在本文中,我们提出了一个基于obf的方案,该方案只使用一个Bloom滤波器。基于obf的寻址方案在保持与传统布隆滤波器几乎相同的误报率的同时,显著提高了寻址效率。基于obf的有两个关键特性,一个是它实现了恒定的,但较小的IP查找时间,另一个是它对地址的长度不敏感。仿真结果表明,所提出的寻址方案比现有的寻址方案更适合于FlexIP寻址。
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