In wireless Multicast Broadcast Service (MBS), the common channel is employed to multicast the MBS content to the Mobile Stations (MSs) on the MBS calls among the coverage space of a Base Station (BS), that causes interference to the dedicated channels serving the traditional calls, and degrades the system capability. The MBS zone technology is proposed in Mobile Communications Network (MCN) standards to boost system capacity and reduce the handoff delay for the wireless MBS calls. Within the MBS zone technology, a group of BSs kind an MBS zone, where the macro diversity is applied in the MS, the BSs synchronize to transmit the MBS content on the identical common channel, interference caused by the common channel is reduced, and so the MBS MSs need not perform handoff whereas moving between the BSs within the identical MBS zone. However, when there is no MBS MS in an exceedingly very BS with the MBS zone technology, the transmission on the common channel wastes the bandwidth of the BS. It could be a crucial issue to work out the condition for the MBS Controller (MBSC) to enable the MBS zone technology by considering the QoS for ancient calls and MBS calls. In this paper, we tend to propose a pair of Dynamic Channel Allocation schemes: DCA and EDCA by considering the condition for enabling the MBS zone technology. Analysis and simulation experiments are conducted to research the performance of DCA and EDCA.
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