Tuyển tập các báo cáo nghiên cứu về hóa học được đăng trên tạp chí hóa hoc quốc tế đề tài : A network resource availability model for WLAN carrying different service types | Luo and Bodanese EURASIP Journal on Wireless Communications and Networking 2011 2011 103 EURASIP Journal on . http content 2011 1 103 Wireless Communications and Networking a SpringerOpen Journal RESEARCH Open Access A network resource availability model for b-based WLAN carrying different service types Weizhi Luo and Eliane L Bodanese Abstract Operators of integrated wireless systems need to have knowledge of the resource availability in their different access networks to perform efficient admission control and maintain good quality of experience to users. Network availability depends on the access technology and the service types. Resource availability in a WLAN is complex to gather when UDP and TCP services co-exist. Previous study on b derived the achievable throughput under the assumption of inelastic and uniformly distributed traffic. Further study investigated TCP connections and derived a model to calculate the effective transmission rate of packets under the assumption of saturated traffic flows. The assumptions are too stringent therefore we developed a model for evaluating WLAN resource availability that tries to narrow the gap to more realistic scenarios. It provides an indication of WLAN resource availability for admitting UDP TCP requests. This article presents the assumptions the mathematical formulations and the effectiveness of our model. 1. Introduction Operators that control integrated wireless systems with multiple radio access technologies RATs need to have a very good knowledge of the current context of each radio access network RAN to perform efficient call admission control and at the same time maintain a good quality of experience to their users. With the emergence of various service types such as video call and streaming services RAN selection needs to be intelligent and context aware. The selection not only should consider the user service requirements but it also should take into account .
