PERFORMANCE COMPARISON OF CELL-BASED AND PACKET-BASED SWITCHING SCHEMES FOR SHARED MEMORY SWITCHES  

作　　者：XiKang GeNing FengChongxi 

机构地区：[1]DepartmentofElectronicEngineering,TsinghuaUniversity,Beijing100084

出　　处：《Journal of Electronics(China)》2004年第1期55-63,共9页电子科学学刊（英文版）

基　　金：Supported by the National Natural Science Foundation of China(No.69896242).

摘　　要：Shared Memory (SM) switches are widely used for its high throughput, low delay and efficient use of memory. This paper compares the performance of two prominent switching schemes of SM packet switches: Cell-Based Switching (CBS) and Packet-Based Switching (PBS).Theoretical analysis is carried out to draw qualitative conclusion on the memory requirement,throughput and packet delay of the two schemes. Furthermore, simulations are carried out to get quantitative results of the performance comparison under various system load, traffic patterns,and memory sizes. Simulation results show that PBS has the advantage of shorter time delay while CBS has lower memory requirement and outperforms in throughput when the memory size is limited. The comparison can be used for tradeoff between performance and complexity in switch design.Shared Memory (SM) switches are widely used for its high throughput, low delay and efficient use of memory. This paper compares the performance of two prominent switching schemes of SM packet switches: Cell-Based Switching (CBS) and Packet-Based Switching (PBS). Theoretical analysis is carried out to draw qualitative conclusion on the memory requirement, throughput and packet delay of the two schemes. Furthermore, simulations are carried out to get quantitative results of the performance comparison under various system load, traffic patterns, and memory sizes. Simulation results show that PBS has the advantage of shorter time delay while CBS has lower memory requirement and outperforms in throughput when the memory size is limited. The comparison can be used for tradeoff between performance and complexity in switch design.

关 键 词：Shared memory switch Packet switching Cell switching THROUGHPUT Packet delay 

分 类 号：TN915.0[电子电信—通信与信息系统]