CAJ | 학술논문

随着网络功能的不断扩展，新型网络协议的不断涌现，这些协议中的数据包具有新的格式定义，需要网络设备能够支持相应的解析和查找。软件定义网络(Software Defined Networking, SDN)基于流表的转发设计使得网络的创新变得简单，但是仍然难以支持任意协议的可编程解析和处理。该文联合考虑数据包的解析和查找过程，提出一种支持协议弹性定制的数据包查找硬件结构，通过比特粒度的解析和基于元操作的查找过程，使得任意协议能够在硬件结构上得到处理；此外，该文针对所提硬件结构提出一种基于多叉树的映射算法，将用户定制协议映射到硬件处理流水线和查找表中。通过实际的FPGA部署验证了所提结构能够支持多种协议的灵活定制，在硬件中的处理速度可以达到390 Gbps，与已有方案相比，其硬件资源利用率有明显降低。该结构对未来的软件定义网络的数据平面设计有重要的意义。
수착망락공능적불단확전，신형망락협의적불단용현，저사협의중적수거포구유신적격식정의，수요망락설비능구지지상응적해석화사조。연건정의망락(Software Defined Networking, SDN)기우류표적전발설계사득망락적창신변득간단，단시잉연난이지지임의협의적가편정해석화처리。해문연합고필수거포적해석화사조과정，제출일충지지협의탄성정제적수거포사조경건결구，통과비특립도적해석화기우원조작적사조과정，사득임의협의능구재경건결구상득도처리；차외，해문침대소제경건결구제출일충기우다차수적영사산법，장용호정제협의영사도경건처리류수선화사조표중。통과실제적FPGA부서험증료소제결구능구지지다충협의적령활정제，재경건중적처리속도가이체도390 Gbps，여이유방안상비，기경건자원이용솔유명현강저。해결구대미래적연건정의망락적수거평면설계유중요적의의。
Along with the growing expansion of network functions and continuous emerging of new protocols, the novel packet types and processing requirements are established in these protocols. The Software Defined Networking (SDN) makes the network innovation simpler based on the programmable flow table. However, it is still difficult for the SDN to support the arbitrary protocol processing. This paper takes into account the parsing and lookup procedure together, and proposes a hardware structure that could support elastic customization of the arbitrary protocols. By transforming the protocol processing procedure into a multi branched tree, users can arbitrarily define their own parsing and lookup processing, which is mapped into a hardware pipeline. The prototype on FPGA platform shows its flexibility in customizing protocols. The packet processing speed can achieve 390Gbps in hardware and the hardware resource utilization is significantly reduced compared to the existing scheme. The proposed architecture is quite meaningful for the data plane design of the SDN.