【摘要】 IEEE 802.11b的DCF接入方式是为无线数据业务提供接入而设计的,不能有效地支持诸如语音之类的实时业务。提出了两种改进的MAC层机制来提高无线局域网上传输语音(VoWLAN)的系统容量和有效性。分析和仿真结果表明,改进机制显著提高了系统容量,并保证了传输延迟、抖动和平均丢包率等服务质量(QoS)要求。更多还原

【Abstract】 IEEE 802.11b DCF was designed to provide wireless data access to support real-time services such as voice. This paper proposed two modified MAC schemes to improve capacity and efficiency of Voice over WLAN(VoWLAN) systems.Analysis and simulation results show that the proposed schemes effectively improve the system capacity,while QoS requirements,such as delay,delay jitter,and average loss rate,are guaranteed.更多还原