| We describe a new medium-access control (MAC) protocol for dynamic adjustment of the bandwidth requirement of multimedia applications. The purpose of this technique is handling multi-rate, multi-level traffic in an integrated wireless-access network (IWAN). A proposed mechanism divide total bandwidth in basic band and reservation band. Four conventional access techniques which are CDMA, CSMA, TDMA and FDMA are combined in the basic band. Reservation band choose these four techniques flexibly depending the traffic characteristics and quality of services (QoS) requirement. This Movable Frame Hybrid MAC (FMHMAC) is called software radios in third generation (3G) wireless network designing.; A comparative evaluation of this access technique is done by simulation procedure Through simulations, the performances of the proposed access technique (e.g. call blocking probability, average delay and delay jitter) show that is both robust and suitable for the intended IWAN applications, this will results in high QoS guarantee for arbitrary traffic condition. |
