Effects of multiple access alternatives in heterogeneous wireless networks

Vanem, Erik; Svaet, Stein; Paint, F.

doi:10.1109/wcnc.2003.1200642

Cited by 28 publications

(18 citation statements)

References 4 publications

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“…Thus, in our load sharing scheme, an incoming voice call is preferably distributed to the cell, and overflows to the WLAN only if there is not sufficient free bandwidth for a voice call in the cell. The advantage of preferably assigning voice calls to the cell has also been observed in previous works such as [19]. On the other hand, we also consider dynamic transfer of ongoing voice calls in the WLAN to the cell via vertical handoff whenever the cell has free bandwidth to accommodate more voice calls.…”

Section: A Proposed Load Sharing Scheme With Qos-awarenessmentioning

confidence: 74%

Multi-service load sharing for resource management in the cellular/WLAN integrated network

Song

Zhuang

2009

IEEE Trans. Wireless Commun.

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Abstract-With the interworking between a cellular network and wireless local area networks (WLANs), an essential aspect of resource management is taking advantage of the overlay network structure to efficiently share the multi-service traffic load between the interworked systems. In this study, we propose a new load sharing scheme for voice and elastic data services in a cellular/WLAN integrated network. Admission control and dynamic vertical handoff are applied to pool the free bandwidths of the two systems to effectively serve elastic data traffic and improve the multiplexing gain. To further combat the cell bandwidth limitation, data calls in the cell are served under an efficient service discipline, referred to as shortest remaining processing time (SRPT) [1]. The SRPT can well exploit the heavy-tailedness of data call size to improve the resource utilization. An accurate analytical model is developed to determine an appropriate size threshold so that data calls are properly distributed to the integrated cell and WLAN, taking into account the load conditions and traffic characteristics. It is observed from extensive simulation and numerical analysis that the new scheme significantly improves the overall system performance.Index Terms-Cellular/WLAN interworking, resource management, quality of service, load sharing, vertical handoff, admission control.

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Section: A Proposed Load Sharing Scheme With Qos-awarenessmentioning

confidence: 74%

Multi-service load sharing for resource management in the cellular/WLAN integrated network

Song

Zhuang

2009

IEEE Trans. Wireless Commun.

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“…P d2 decreases from 0.44 (in scenario 1) to 0.09 (in scenario 3) at the arrival rate of 6 calls/minute. 11,12,13,14,15,16) However, for each of the four scenarios in Fig. 15, P d2 is higher than the corresponding P d1 in Fig.…”

Section: Effect Of Terminal Heterogeneity On Class-1 Hcdpmentioning

confidence: 81%

“…7 Effect of diverse heterogeneous mobile terminal penetrations on P b1 at different call arrival rates (Scenarios 4,5,6,7,8,9,10) Fig. 8 Effect of diverse heterogeneous mobile terminal penetrations on P b1 at different call arrival rates (Scenarios 4,11,12,13,14,15,16) varies considerably with the different combinations of the heterogeneous mobile terminals.…”

Section: Effect Of Terminal Heterogeneity On Class-1 Ncbpmentioning

confidence: 99%

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Effect of mobile terminal heterogeneity on call blocking/dropping probability in cooperative heterogeneous cellular networks

Falowo

Chan

2010

Telecommun Syst

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It is envisaged that next generation wireless networks (NGWN) will be heterogeneous, consisting of multiple radio access technologies (RATs) coexisting in the same geographical area. In these heterogeneous wireless networks, mobile terminals of different capabilities (heterogeneous terminals) will be used by subscribers to access network services. We investigate the effect of using heterogeneous mobile terminals (e.g. single-mode, dual-mode, triple-mode, etc.) on call blocking and call dropping probabilities in cooperative heterogeneous wireless networks. We develop analytical models for heterogeneous mobile terminals and joint radio resource management in heterogeneous wireless networks. Using a two-class three-RAT heterogeneous wireless network as an example, the effect of using heterogeneous terminals in the network is evaluated. Results show the overall call blocking/dropping probability experienced by subscribers in heterogeneous wireless networks depends on the capabilities of mobile terminals used by the subscribers. In the worst case scenario, when all subscribers use single-mode mobile terminals, each subscriber is confined to a single RAT and consequently, joint radio resource management in heterogeneous wireless network has no improvement on new call blocking and handoff call dropping probabilities. However, in the best case scenario, when all subscribers use three-mode terminals, new class-1 call blocking probability decreases from 0.37 (for 100% singlemode terminals) to 0.05, at the arrival rate of 6 calls per minute. New class-2 call blocking probability also decreases from 0.8 to 0.52. Similarly, handoff class-1 call dropping probability decreases from 0.14 to 0.003, and handoff class-2 call dropping probability decreases from 0.44 to 0.09.

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“…J. Noonan et al in [10] examine the VHO decision, and propose that the selection decision is made by the client application by considering network characteristics and cost. Venom et al [11] propose a user-centric selection approach that estimates user satisfaction regarding the selection of radio links in heterogeneous wireless networks. [12] proposes a net utility-based network selection algorithm, where a utility function is used to reflect the user satisfaction level to QoS and a cost function is used to reflect the cost for service.…”

Section: Introductionmentioning

confidence: 99%