Multicasting in IEEE 802.17 resilient packet ring

Abstract

By using destination stripping and shortest-path routing, the new standard IEEE 802.17 resilient packet ring (RPR) allows for spatial reuse, resulting in a significantly increased capacity compared to source-stripping legacy ring networks. We show that for multicast traffic the performance of RPR reduces to that of legacy ring networks that do not support spatial reuse. We propose a bandwidth-efficient and cost-sensitive multicast approach for RPR networks that exploits RPR's built-in topology discovery and supplementary time-to-live field to enable spatial reuse for multicast traffic. By means of analysis and simulation we investigate the proposed multicast approach in terms of transmission, multicast, and reception capacities as well as throughput efficiency for different numbers of nodes and multicast fanout under various traffic scenarios. Our findings show that for multicast traffic, the transmission capacity and multicast capacity of RPR are increased significantly, in particular for small to medium multicast group sizes, and a multicast throughput efficiency of 100% is achieved. Besides the performance gain, the proposed multicast approach is able to maintain RPR's simplicity.

WDM star subnetwork upgrade of optical ring networks for maximum spatial reuse under multicast traffic

“…This ring model of the RS segment is equivalent to a single channel ring considered in [29]. In particular, note that p ,Γ (k) =…”

“…(13) in [29] represents the probability for the event that a particular considered gap in the ring model has k hops. We are interested in the two gaps bordering on the merged ring-and-star homed node.…”

Shortest path routing in optical wdm ring networks under multicast traffic

“…We evaluate the expected hop distance E[H λ ] by extending the notion of the largest gap, detailed in [3] for the singlewavelength ring network, to the WDM ring as follows. For each wavelength λ, λ = 1, .…”

“…,η of the largest gap on wavelength Λ of the WDM ring in terms of the expected length of the largest gap g( , η) on a single-wavelength ring analyzed in [3] by observing that the only difference between the two is that successive nodes on wavelength Λ in the WDM ring are spaced Λ hops apart, whereas successive nodes in the single-channel ring are 1089-7798/06$20.00 c 2006 IEEE one hop apart. Hence, g…”

Multicasting in a WDM-upgraded Resilient Packet Ring

“…In [4], we have described and investigated a bandwidth-efficient and cost-effective multicast approach, in detail for (single-channel) RPR networks, which exploits the RPR's built-in topology discovery and supplementary time to live (ttl) field to enable spatial reuse for multicast traffic, leading to a significantly increased transmission capacity, multicast capacity, and reception capacity. In this paper, we extend our multicast approach and analysis to wavelength division multiplexing (WDM)-upgraded RPR networks, where each fiber carries multiple wavelength channels.…”