Handoff Triggering and Network Selection Algorithms for Load-Balancing Handoff in CDMA-WLAN Integrated NetworksReportar como inadecuado




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EURASIP Journal on Wireless Communications and Networking

, 2008:136939

First Online: 20 August 2008Received: 28 November 2007Revised: 26 April 2008Accepted: 11 August 2008

Abstract

This paper proposes a novel vertical handoff algorithm between WLAN and CDMA networks to enable the integration of these networks. The proposed vertical handoff algorithm assumes a handoff decision process handoff triggering and network selection. The handoff trigger is decided based on the received signal strength RSS. To reduce the likelihood of unnecessary false handoffs, the distance criterion is also considered. As a network selection mechanism, based on the wireless channel assignment algorithm, this paper proposes a context-based network selection algorithm and the corresponding communication algorithms between WLAN and CDMA networks. This paper focuses on a handoff triggering criterion which uses both the RSS and distance information, and a network selection method which uses context information such as the dropping probability, blocking probability, GoS grade of service, and number of handoff attempts. As a decision making criterion, the velocity threshold is determined to optimize the system performance. The optimal velocity threshold is adjusted to assign the available channels to the mobile stations. The optimal velocity threshold is adjusted to assign the available channels to the mobile stations using four handoff strategies. The four handoff strategies are evaluated and compared with each other in terms of GOS. Finally, the proposed scheme is validated by computer simulations.

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Autor: Jang-Sub Kim - Erchin Serpedin - Dong-Ryeol Shin - Khalid Qaraqe

Fuente: https://link.springer.com/







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