Queueing Performance Analysis of Periodic Polling Services for VoIP in an IEEE802.16 System.
ABSTRACT In this paper, we consider the queueing performance of periodic polling services for VoIP in an IEEE802.16 system, which is modeled by an MIGIC type queue with periodic batch service. We carry out an analysis for this system, using a generating function approach with supplementary variable technique. As a service discipline, the size of batch, the transmission duration in units of frames, i.e., contiguous frames, and the vacation period correspond to the bandwidth assigned to a subscriber station and the period to poll other subscriber stations, respectively. In numerical examples, the mean queue lengths are given, according to various system parameters.
Conference Proceeding: Queueing analysis of OFDM/TDMA systems[show abstract] [hide abstract]
ABSTRACT: In this paper, we analyze the radio link level queueing performance of a OFDM/TDMA network under Rayleigh fast fading channel. The probability mass function of transmission rate is derived analytically. A vacation queueing model is used to capture the data transmission corresponding to a particular user. The probability transition matrix for the queue of that particular user is formulated as quasi-birth-and-death process, and a matrix geometric method is used to obtain the queue-length distribution. The proposed model is verified by extensive simulations. Also, we demonstrate how the model can be used for admission control so that the radio link level queueing performances for the different users can be satisfiedGlobal Telecommunications Conference, 2005. GLOBECOM '05. IEEE; 01/2005
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ABSTRACT: Although the medium access control (MAC) signaling has been well-defined in the IEEE 802.16 specifications, resource management and scheduling, which are crucial components to guarantee QoS performances, still remain as open issues. In this paper, we propose a scheme for queue-aware uplink bandwidth allocation in a subscriber station (SS) for polling services (real-time and non-real-time) in IEEE 802.16 broadband wireless networks. The proposed scheme adaptively allocates bandwidth in order to control queue length at a target level so that the requirements for delay and PDU dropping probability can be met. We present a queueing analytical framework to analyze the proposed scheme from which various QoS performance measures can be obtained. The proposed analytical model is validated by simulations and typical numerical results are presentedGlobal Telecommunications Conference, 2005. GLOBECOM '05. IEEE; 01/2005
Conference Proceeding: Performance Analysis of IEEE802.16d Random Access Protocol[show abstract] [hide abstract]
ABSTRACT: In this paper, we investigate the performance of IEEE802.16d random access protocol based on orthogonal code-division-multiple-access and frequency-division-multiple-access in time division duplexing mode using equilibrium point analysis. The random access protocol of IEEE802.16d is similar to demand-assigned multiple access with piggyback, in which bandwidth request is allowed at the end of data transmission. In the analysis, we consider the retransmission probability derived from a binary exponential backoff algorithm. The performance is presented in terms of initial access delay, its throughput, message transmission delay and the system throughput with piggyback by varying number of subscriber stations, number of PN codes for bandwidth request ranging, number of slot-subchannel and the parameters of the binary exponential backoff algorithm.Communications, 2006. ICC '06. IEEE International Conference on; 07/2006