| |
| This paper presents a multi-service timeslot dynamic reservation (MTDR) protocol to support voice with constant bit-rate (CBR), video with variable bit-rate (VBR) and data with available bit-rate (ABR) over IEEE 802.11 Ad hoc wireless LAN. In MTDR, Real-time service (voice and video) has a higher priority assigned than non real-time service (data), in accessing the shared channel. The quality of real-time service can be guaranteed by reserving service timeslots. Moreover, MTDR defines multiple service timeslots respectively for CBR and VBR real-time services to meet their different requirement on quality of service (QoS). A suitable analytical approach is proposed in order to evaluate the voice, video and data subsystem performance. Simulations show that MTDR is able to provide almost 90% channel utilization, low call blocking probability due to setup time exceeded and packet loss due to delay expiry, and low jitter for real-time multimedia service. |
|
| Keywords:WLAN, CBR, VBR, ABR, QoS |
|
