一种新型分组过滤器的存储和匹配方案设计

Design of a novel storage and matching scheme for packet filters

PF(分组过滤器)是EPS(演进型分组系统)的重要组成部分。在详细分析EPS中PF存储方案的基础上,给出了一种新的基于EPS承载的PF储存和匹配方法,将PF按照对应的承载标识存储到承载信息单元中,同时为了实现基于PF优先级的IP分组数据包匹配,建立了按照优先级排序的PF信息表,利用PF信息表可以快速地找到对应优先级的PF存储位置,完成IP数据包的匹配。

Existing in Traffic Flow Template (TFT)of the Evolved Packet System (EPS)bearer,Packet Filter (PF)is one of the major component parts of the EPS systems.On the basis of the detailed analysis of the PF storage scheme,we propose a new EPS bearer-based PF storage and matching method.We store the PF in the bearer information units according to the cor-responding bearer identifications.At the same time,in order to realize PF priority-based IP data packets matching,we work out a PF information table sequenced by priority,which we can use to quickly find the storage location of PF with the corre-sponding priority and complete the matching of IP data packets.