Reliability and cost evaluation of third-generation wireless access network topologies: a case study

Abstract

The "explosive growth in bursty traffic" changes the network dynamics and requires a good evaluation of various classes of service when designing an access network. From a topological standpoint, the multiservice networks in this paper are heterogeneous systems which integrate both a core and some wireless access networks into an infrastructure similar to third-generation wireless networks. Such networks require reliable and cost-effective solutions to the problem of selecting access technologies for satisfying performance and quality of service requirements related to the services and applications envisioned. This paper analyzes the reliability aspects of some access network topologies to insure a certain level of quality of service at the lowest cost for the end users. It considers a mass market equivalent to 1.6 million subscribers, the objective being to determine the cost the users are ready to pay to benefit from services and applications provided by these multiservice networks. For these purposes, the relative behavior of 3 access-network topologies are studied: the tree with parallel backup links, the ring, and the partially meshed topologies. In ring topology, simulation results show that a great connectivity in the access network is not justified in terms of reliability requirements; the partially meshed topology, even if it has redundant links which affect its cost, outperforms the tree with parallel backup links; and the ring topology is more reliable in terms of disconnected sessions than the tree topology. By considering both reliability and cost, a tree with parallel backup links appears the best topology for the access network and its cost is acceptable for the end user. This study can be extended by: 1) establishing the cost as a function of the quality of service; 2) optimizing the partially meshed topology for more reliable networks; and 3) defining a (shaping) policy to deal with a variety of traffic schemes.

A Survey on Cost Effective Survivable Network Design in Wireless Access Network

“…The techniques like distributed databases, breakpoint strategy in protocol, and backup standby databases are recommended for robustness against failure at intelligent layer system databases. Houteo et al [4] analyze the reliability aspects of access network topologies ensure QoS with lowest cost for end users. Three access network topologies are studied: the tree with parallel back up links, the ring and the partially meshed topologies.…”

“…The study establishes (i) the cost as a function of the quality of service (ii) optimizes the partially meshed topology for more reliable networks (iii) define a shaping policy to deal with variety of traffic schemes. To provide survivability in cellular access network, Snow et al [4] proposed solution at architectural level like sonnet ring, devices with multiple modes of operations and overlay networks. Sonnet Rings: Sonnet ring inhibits ring architecture with dual rings.…”

Pricing the Internet With Multibid Auctions

“…Property 4 is then established by applying (18) to link l root . We now give a lemma that will be used for establishing the main properties of our pricing scheme:…”

“…Indeed, each access network can be modeled this way, as described in [17]: customers are not directly connected to high-speed backbone networks, but rather to "local" access networks, which are then connected to regional networks, themselves being connected to national backbone networks. There exist several justifications in the literature to use this tree topology for access networks, for instance in the case of reliability versus costs trade-off [18] or in [19], where an IP-based architecture for broadband multimedia services is described. It is for instance shown in [18] that the tree topology reduces financial and engineering costs for access networks.…”

“…There exist several justifications in the literature to use this tree topology for access networks, for instance in the case of reliability versus costs trade-off [18] or in [19], where an IP-based architecture for broadband multimedia services is described. It is for instance shown in [18] that the tree topology reduces financial and engineering costs for access networks. We therefore design the multi-bid auction scheme in that context of a tree structure, and investigate the properties of this mechanism, especially focusing on incentives and efficiency.…”