为在保证QoS的前提下提升无线网络的接纳容量,研究了无线网络业务的自相似特征,将其与QoS参数共同引入到服务带宽的计算当中,提出基于服务带宽优化并具有自主特性的SS-CAC(self-organized based on network similarity call admission c...为在保证QoS的前提下提升无线网络的接纳容量,研究了无线网络业务的自相似特征,将其与QoS参数共同引入到服务带宽的计算当中,提出基于服务带宽优化并具有自主特性的SS-CAC(self-organized based on network similarity call admission control)策略,用以降低网络带宽利用度及业务阻塞概率。之后对SS-CAC策略进行实现仿真,与在网络中采用传统CAC机制相比,采用SS-CAC不仅可以保证话音业务的质量还可降低2.69%的数据业务平均带宽使用率,同时数据业务的阻塞率和掉话率也在高负载情况下分别下降了0.95%和2.81%。展开更多
Call admission control (CAC) and resource reservation (RR) for mobile communication are two important factors that guarantee system efficiency and quality of service (QoS) required for different services in a very sca...Call admission control (CAC) and resource reservation (RR) for mobile communication are two important factors that guarantee system efficiency and quality of service (QoS) required for different services in a very scarce resource as the radio spectrum. A new scheme was proposed which extends the concepts of resource sharing and reservations for wideband code division multiple access (WCDMA) systems with a unique feature of soft capacity. Voice and data traffic were considered. The traffic is further classified into handoff and new requests. The reservation thresholds were dynamically adjusted according to the traffic pattern and mobility prediction in order to achieve the maximum channel utilization, while guaranteeing different QoS constraints. The performance of proposed scheme was evaluated using Markov models. New call blocking probability, handoff call dropping probability, and channel utilization were used as benchmarks for the proposed scheme.展开更多
文摘为在保证QoS的前提下提升无线网络的接纳容量,研究了无线网络业务的自相似特征,将其与QoS参数共同引入到服务带宽的计算当中,提出基于服务带宽优化并具有自主特性的SS-CAC(self-organized based on network similarity call admission control)策略,用以降低网络带宽利用度及业务阻塞概率。之后对SS-CAC策略进行实现仿真,与在网络中采用传统CAC机制相比,采用SS-CAC不仅可以保证话音业务的质量还可降低2.69%的数据业务平均带宽使用率,同时数据业务的阻塞率和掉话率也在高负载情况下分别下降了0.95%和2.81%。
文摘Call admission control (CAC) and resource reservation (RR) for mobile communication are two important factors that guarantee system efficiency and quality of service (QoS) required for different services in a very scarce resource as the radio spectrum. A new scheme was proposed which extends the concepts of resource sharing and reservations for wideband code division multiple access (WCDMA) systems with a unique feature of soft capacity. Voice and data traffic were considered. The traffic is further classified into handoff and new requests. The reservation thresholds were dynamically adjusted according to the traffic pattern and mobility prediction in order to achieve the maximum channel utilization, while guaranteeing different QoS constraints. The performance of proposed scheme was evaluated using Markov models. New call blocking probability, handoff call dropping probability, and channel utilization were used as benchmarks for the proposed scheme.
