A wireless TDMA/FDD MAC protocol based on a novel resource updating scheme

In this paper, a TDMA/FDD MAC protocol is developed for wireless multimedia systems based on a new resource updating scheme for VBR connections. Instead of using piggyback, a control time slot (TS) is dynamically allocated for a VBR connection to send the updating information to the base station (BS). A scheduler in the BS allocates a control TS to each VBR connection which needs to update resources. The updating information can be sent to BS without collision via allocated control TS. Combining the novel scheme with the QoS-based frame structure, not only the QoS of VBR connections is guaranteed, but also the performance of other traffic types is improved. The simulation is performed to evaluate the new MAC protocol