One of the critical challenges facing the carriers today is to increase the revenue of services. As the expansion of deployment of packet based bearer networks in the MAN, network resilience becomes a significant contributor to revenue and profit. In this paper, we propose a revenue-based quality of protection (QoP) for capacity design model to provide various protection classes in the multiple services ring (MSR) networks. Based on this model, this paper provides an Enhanced Greedy Algorithm (EGA) to solve revenue-based bandwidth allocation (RBA) problems. All experimental results on the test bed show that EGA is efficient and applicable for embedded systems.
Multiple services ring (MSR) has been standardized in ITU-T numbered as X.87. As a novel multi-service provisioning method based on RPR, MSR proposes an effective mechanism of transporting various voice, data, video services with tributary multicast, protection and performance monitoring functions. In this paper we present the layered model of a MSR and introduce the main enhancements based on RPR. Then we propose a novel Parallelized Processing Mechanism (PPM) for design of MSR using network processor. Our design adopts a combination of layered parallelism and functional parallelism. And this paper also describes the simulation model for performance evaluation with OPNET as well as the implementation of MSR using network processor. System simulations and field trial measurements show that TDM Circuit Emulation (TCE) services and Ethernet services are given the QoS and fast recovery guarantee based on MSR.
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.