| A PARALLEL SWITCH FABRIC BASED ON CROSSBAR |
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| 作者姓名： | 李金库 张德运 高磊 |
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| 作者单位： | Network Research Institute, Xi＇an Jiaotong University, Xi＇an 710049, China |
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| 基金项目： | Foundation Item： This work was supported by the National “863” Program of China （No. 2003AA148010）. |
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| 摘 要： | With the increase of link rate, the arbitrator of centralized switch fabric becomes too complicated to implement. A parallel switch fabric based on crossbar, named as PSFBC （Parallel Switch Fabric Based on Crossbar）, has been proposed in this paper. PSFBC is composed of k switches whose rate is 1/k of link, these switches exchange cells in parallel; this increases the arbitrator＇s period and make it easy to implement. Load is evenly distributed to each switch with FCFS （First Come First Serve） rule, it can keep the order of cells in one stream. A multi-class queue scheduling policy is used in PSFBC to ensure the quality of realtime streams. Experiments show that the load on each switch in PSFBC is well balanced, its average delay of cells is little and its performance is very close to centralized switch; and with the increase of number of parallel switches, the loss of PSFBC＇s performance keeps very small, it becomes easier to implement.
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| 关 键 词： | 转换构造 DWDM 计算机网络 路线 传输效率 |
| 文章编号： | 1671-8267（2005）02-0122-05 |
A PARALLEL SWITCH FABRIC BASED ON CROSSBAR |
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| Li Jinku,Zhang Deyun,Gao Lei.A PARALLEL SWITCH FABRIC BASED ON CROSSBAR[J].Academic Journal of Xi’an Jiaotong University,2005,17(2):122-126. |
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| Authors: | Li Jinku Zhang Deyun Gao Lei |
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| Abstract: | With the increase of link rate, the arbitrator of centralized switch fabric becomes too complicated to implement. A parallel switch fabric based on crossbar, named as PSFBC (Parallel Switch Fabric Based on Crossbar), has been proposed in this paper. PSFBC is composed of k switches whose rate is 1/k of link', these switches exchange cells in parallel; this increases the arbitrator's period and make it easy to implement. Load is evenly distributed to each switch with FCFS (First Come First Serve) rule, it can keep the order of cells in one stream. A multi-class queue scheduling policy is used in PSFBC to ensure the quality of realtime streams. Experiments show that the load on each switch in PSFBC is well balanced, its average delay of cells is little and its performance is very close to centralized switch; and with the increase of number of parallel switches, the loss of PSFBC's performance keeps very small, it becomes easier to implement. |
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| Keywords: | switch fabric arbitrator load balance multi-class queue QoS |
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