Adaptive resource allocation for prioritized call admission over an ATM-based wireless PCN

TitleAdaptive resource allocation for prioritized call admission over an ATM-based wireless PCN
Publication TypeJournal Article
Year of Publication1997
AuthorsYu, O. T. W., and V. C. M. Leung
JournalSelected Areas in Communications, IEEE Journal on
Pagination1208 -1225
Date Publishedsep.
Keywordsadaptive resource allocation, adaptive systems, asynchronous transfer mode, ATM based wireless PCN, backbone networks, bandwidth allocation, call admission control, cellular mobile networks, cellular radio, dynamic guard channel scheme, forced call terminations, guard channel, handoff call arrival rate, handoff call blocking probability, handoff requests, internetworking, mobility pattern, network-wide handoffs, new call blocking probability, nonstationary call arrival rates, ongoing calls, personal communication networks, personal communications networks, prioritized call admission, probability, radio channel allocation, resource allocation, stationary traffic conditions, telecommunication channels, telecommunication congestion control, telecommunication traffic

In future personal communications networks (PCNs) supporting network-wide handoffs, new and handoff requests will compete for connection resources in both the mobile and backbone networks. Forced call terminations due to handoff call blocking are generally more objectionable than new call blocking. The previously proposed guard channel scheme for radio channel allocation in cellular networks reduces handoff call blocking probability substantially at the expense of slight increases in new call blocking probability by giving resource access priority to handoff calls over new calls in call admission control. While the effectiveness of a fixed number of guard channels has been demonstrated under stationary traffic conditions, with nonstationary call arrival rates in a practical system, the achieved handoff call blocking probability may deviate significantly from the desired objective. We propose a novel dynamic guard channel scheme which adapts the number of guard channels in each cell according to the current estimate of the handoff call arrival rate derived from the current number of ongoing calls in neighboring cells and the mobility pattern, so as to keep the handoff call blocking probability close to the targeted objective while constraining the new call blocking probability to be below a given level. The proposed scheme is applicable to channel allocation over cellular mobile networks, and is extended to bandwidth allocation over the backbone network to enable a unified approach to prioritized call admission control over the ATM-based PCN


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