彈性分組環(huán)保護(hù)倒換策略的研究
The Study of Protection Switch Schemes in Resilient Packet Ring
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摘要: 保護(hù)倒換是彈性分組環(huán)中的一項(xiàng)關(guān)鍵技術(shù),目前IEEE802.17草案中的保護(hù)倒換策略只能夠提供小于50ms 的保護(hù)倒換時(shí)間,但卻無法在保護(hù)倒換發(fā)生后保證實(shí)時(shí)業(yè)務(wù)的服務(wù)質(zhì)量。為解決此問題,針對(duì)RPR MAC層的兩種結(jié)構(gòu)模式單隊(duì)列和雙隊(duì)列模式,我們制定了兩種不同的保護(hù)倒換策略并對(duì)它們進(jìn)行了性能分析。仿真結(jié)果表明, 這些策略能在保護(hù)倒換發(fā)生后很好地確保實(shí)時(shí)業(yè)務(wù)的服務(wù)質(zhì)量。
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關(guān)鍵詞:
- 彈性分組環(huán); 保護(hù)倒換; 故障環(huán); 倒換環(huán)
Abstract: Protection switching is a key technique in Resilient Packet Ring(RPR). Although current protection switching scheme defined in 1EEE802.17 draft can provide sub-50ms protection switching time, it can not ensure QoS of real time service. To solve this problem, two new protection switching schemes are presented in this paper. These two schemes are respectively suitable for the two structures of RPR MAC: single-queue MAC and dual-queue MAC. The performances of these two schemes are also analyzed in this paper. Simulation results show that these schemes can ensure QoS of real-time service when protection switching occurs. -
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