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Performance analysis for voicedata integration on a finite-buffer mobile system.pdf

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Performance analysis for voicedata integration on a finite-buffer mobile system

IEEE TRANSACTIONS ON VEHICULAR TECHNOLOGY, VOL. 49, NO. 2, MARCH 2000 367 Performance Analysis for Voice/Data Integration on a Finite-Buffer Mobile System Yieh-Ran Haung, Yi-Bing Lin, Senior Member, IEEE, and Jan-Ming Ho Abstract—Personal communication service (PCS) networks offer mobile users diverse telecommunication applications, such as voice, data, and image, with different bandwidth and quality-of-service (QoS) requirements. This paper proposes an analytical model to investigate the performance of an integrated voice/data mobile network with finite data buffer in terms of voice-call blocking probability, data loss probability, and mean data delay. The model is based on the movable-boundary scheme that dynamically adjusts the number of channels for voice and data traffic. With the movable-boundary scheme, the bandwidth can be utilized efficiently while satisfying the QoS requirements for voice and data traffic. Using our model, the impact of hot-spot traffic in the heterogeneous PCS networks, in which the param- eters (e.g., number of channels, voice, and data arrival rates) of cells can be varied, can be effectively analyzed. In addition, an iterative algorithm based on our model is proposed to determine the handoff traffic, which computes the system performance in polynomial-bounded time. The analytical model is validated by simulation. Index Terms—Handoff, hot-spot, movable-boundary, personal communication service, quality-of-service. I. INTRODUCTION A PERSONAL communication service (PCS) [1]–[4] network offers integrated services where mobile users communicate via wireless links in the radio coverage of base stations. PCS networks are expected to support diverse applica- tions, such as voice, data, and image, etc., demanding different quality-of-service (QoS) and bandwidth. The bandwidth of the wireless links is inherently limited and is generally much smaller than that in its wireline counterpart. Particularly, for integrated voice/data mobile networks, vo