Resilient Packet Ring (RPR) has been standardized in the IEEE 802.17 working group. In multi-ring networks, similarly with other ring-based technology, intra-ring traffic demand is protected against single node and span failures within 50 ms by the "steering" and "wrapping" protection. Inter-ring traffic demand, however, is susceptible to failures at nodes or links where the traffic demand transits from one ring to another. Normally, the survivability of interconnecting node or link failure has to be provided by other technologies, such as MPLS and Spanning Tree Protocol. Unfortunately, most schemes cannot provide a cost-effective solution with guaranteeing the restoration within the 50 ms timeframe.In this paper we proposed a cost-effective and fast Recovery Mechanism for Multi-ring Interconnection Networks Based on RPR. Differential from Spanning Tree Protocol (STP) and other protection technologies, this mechanism has the ability of sub-50ms protection provisioning and scalability based on the bridging function in RPR. Particular with enhanced bridging support, this mechanism can provide efficient bandwidth spatial reuse on multi-ring RPR networks.The proposed novel mechanism has been implemented on our 10Gbps network processor (NP) based multi-service provisioning platform. All experimental results presented in this paper come from actual testing on the network test bed and show that the all the inter-ring traffic are given the sub-50ms recovery guarantee as intra-ring traffic in normal case.
Beyond 3G system integrates various wireless accesses including 3G, 4G and wireless LANs and provides an all IP wireless solution for various Internet services. The ubiquitous and plug-and-play characteristics of Ethernet provide a unique opportunity to cover all access points of various radio systems. However, the mobile Ethernet still has the challenge of fault tolerance and survivability in migration to B3G systems. In this paper we propose a hierarchical self-healing ring (HSHR) architecture for mobile Ethernet networks. Based on the proposed heuristic algorithm called Resilient Cycle (R-cycle), fast automatic protection switching on the order of milliseconds, often in sub-50ms, can be achieved in distributed resilience Ethernet rings. This paper also describes an implementation of Rcycle algorithm on our 10Gbps network processor based Multi-service Ethernet Platform. It is shown that in the hierarchical self-healing ring (HSHR) architecture satisfactory performance and deterministic fast recovery can be guaranteed based on the proposed R-cycle algorithm.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.