Design of Switch Fabric in Satellite Onboard IP Switch Based on a Multi-Priority Variable-Length Packets Scheduling

SHEN Ze-min; QIAO Lu-feng; CHEN Qing-hua; SHAO Shi-lei

doi:10.3969/j.issn.0372-2112.2014.10.027

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Design of Switch Fabric in Satellite Onboard IP Switch Based on a Multi-Priority Variable-Length Packets Scheduling

更新时间：2025-07-16

- Design of Switch Fabric in Satellite Onboard IP Switch Based on a Multi-Priority Variable-Length Packets Scheduling
- Acta Electronica Sinica Vol. 42, Issue 10, Pages: 2045-2049(2014)
- 作者机构：
  
  解放军理工大学通信工程学院,江苏,南京,210007
- 作者简介：
- 基金信息：
- DOI：10.3969/j.issn.0372-2112.2014.10.027
  CLC： TP393
- Published：2014
- 稿件说明：
移动端阅览
SHEN Ze-min, QIAO Lu-feng, CHEN Qing-hua, et al. Design of Switch Fabric in Satellite Onboard IP Switch Based on a Multi-Priority Variable-Length Packets Scheduling[J]. Acta Electronica Sinica, 2014, 42(10): 2045-2049.
DOI：

SHEN Ze-min, QIAO Lu-feng, CHEN Qing-hua, et al. Design of Switch Fabric in Satellite Onboard IP Switch Based on a Multi-Priority Variable-Length Packets Scheduling[J]. Acta Electronica Sinica, 2014, 42(10): 2045-2049. DOI： 10.3969/j.issn.0372-2112.2014.10.027.

摘要

针对星载IP交换机中硬件资源使用受限的情况

设计实现了一种具有8个优先级、采用指针复制和变长分组调度机制的大容量共享存储交换结构

给出了电路的具体组成、关键调度算法和工作流程.使用Xilinx V4sx55 FPGA实现了完整的88交换结构

电路共占用了164K字节片上存储器资源和5982个4输入查找表

可以满足三模冗余设计要求.在系统工作主频为100MHz、片外采用SRAM、数据位宽为64的情况下

交换结构的峰值吞吐率可以达到1.6Gbps；片外采用133MHz DDR存储器、位宽为64时

交换结构的峰值吞吐率可以达到4.25Gbps；该交换单元进行多级扩展后

可以满足10Gbps以上的系统设计需求.

Abstract

Considering the hardware resources limitation in the satellite onboard IP switch

a high capacity shared memory switch fabric with 8 priorities

variable-length packets scheduling mechanisms and pointer copy is presented.The specific structure

the key scheduling algorithm and the working processes of the circuits are provided.Xilinx V4sx55 FPGA are used to realize a 88 switch fabric

the circuits occupy 164K bytes on-chip memory resources and 5982 4 input lookup tables

which can meet the requirements of triple modular redundancy.When the working frequency is 100MHz

64 bit width off-chip SRAM

the peak throughput of the switch fabric can reach 1.6Gbps.Using 64 bit width

133MHz DDR off-chip memory

the peak throughputs can reach 4.25Gbps.The fabric can be used in multi-stage switch fabrics which can meet the demand of throughputs over 10Gbps.

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