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片上光网络（NoC）可以有效地提高通信带宽，并降低多处理器系统级芯片的能量消耗。在片上网络架构中，2D Mesh是传统的拓扑结构，其路由器上连接单一的IP核。在本文介绍了一种新的名为“Cluster Mesh（CM）”的网状拓扑结构，在该拓扑结构中，一个路由器上连接了四个IP核。本文使用OPNET仿真软件建立了Cluster Mesh网络和2D Mesh网络的仿真平台，研究并比较了Cluster Mesh拓扑结构与传统的Mesh拓扑结构的性能。通过仿真得到了两种不同拓扑结构下，在不同的数据包注入率时，网络的端到端延迟和吞吐量。结果表明，在具有相同数目的IP核的条件下，与传统的2D Mesh片上光网络相比，Cluster Mesh片上光网络所需要的微环谐振器数目更少。而且在50％的流量为局部流量的情况下， Cluster Mesh片上光网络具有更好的性能。“,”Optical Networks-on-chip (NoCs) can effectively improve the communication bandwidth and reduce the power consume of multiprocessor systems-on-chip. 2D-Mesh is a traditional topology in the NoCs architectures. In this paper, we introduce a new Mesh topology with several IP cores on one router named Cluster-Mesh (CM) topology. We research and compare the performance of the Cluster-Mesh topology to the traditional mesh topology with single IP core on its router. We built simulated platforms for both Cluster-Mesh optical NoC with 2D optical mesh NoC use OPNET simulated software, and showed the End-to-End delay and throughput under different Packet Injection Rates. The results show that, with the same IP cores, the Cluster-Mesh optical NoC consumes less number of microring resonators, and better performance under 50%local traffic condition.