Predictive mobile-oriented channel reservation schemes in wireless cellular networks

Abstract

Provision of seamless service to multimedia applications in cellular wireless networks largely depends on the way calls are handled during handoff. Hence, sufficient resources must be provided for handoff (HO) connections when a mobile station (MS) moves from one cell to another. Effective allocation of resources can be achieved when the exact future trajectory of MSs is known in advance. However, such a scenario is unrealistic. The next best possibility is to employ user mobility prediction to determine the cell(s) a MS will likely visit in the near future. In this paper, we present an extensive survey and classification of channel (bandwidth) reservation schemes which employ user mobility prediction in the resource reservation process. We also present a survey and classification of call admission control (CAC) schemes, including discussion of prioritized and non-prioritized handoff schemes, which can be useful for researches both in academia and industry.

Prioritized New Call Threshold Policy for Wireless Cellular Networks

“…In this policy, it has to be ensured that the system guarantees potentially different QoS requirements and also provides the essential service differentiation from diverse applications. Another necessity is the complete utilization of the scarce wireless bandwidth of the wireless cellular networks [1,2].…”

“…In order to achieve this continuity during the movement of the users between the cells, the Handoff (or handover) process is utilized. In Handoff process, the change of the channel (the frequency, the time slot, the spreading code, or a combination of them) associates with the actual connection while a call is in progress [1,2].…”

“…Moreover, the CAC scheme is also expected to decrease the blocking possibility of the new calls, besides expectation about the maximization of channel use. But it is not easy to meet all these conflicting requirements, and there are tradeoff relationships between the parameters [1,2].…”

“…A lot of research has been carried out on the domain of CAC for wireless cellular networks [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17]. If there is a need for a comprehensive review of the work done on CAC, please, refer to [1], in which a discussion on general concepts of cellular wireless networks, review of the work done in mobility modeling domain, and an overview of CAC schemes were provided.…”

Robustness of optimal channel reservation using handover prediction in multiservice wireless networks

“…Many schemes proposed in the literature adjust the number of guard channels as a function of the predicted occurrence of handovers. See for example [2,[8][9][10] and references therein. Most of these studies propose a prediction system and a companion admission control (AC) scheme that makes use of the information provided by the former in a heuristic way.…”