中文摘要：

针对蜂窝网和无线局域网（WLAN）的融合网络，提出一种基于优先级的动态负载传递（PDLT）算法．呼叫接入控制的动态垂直切换由整个网络状态和业务特性以及终端位置信息联合触发．当蜂窝网络或WLAN中无可用带宽资源时，该算法能够将重叠覆盖区域中新的语音或者数据呼叫传递到尚有带宽资源的网络；同时，动态计算网络带宽资源占用情况，根据设定的门限值将正在进行的语音或数据通信切换到带宽资源宽裕的网络，平衡网络中的语音／数据呼叫数目．二维马尔科夫模型分析和仿真结果表明，PDLT算法能有效地提高整个网络中的业务接入量，减小新呼叫的阻塞概率，增加数据吞吐量并降低服务的响应时间．

英文摘要：

For the integration network of a cellular network and a wireless local area network （WLAN）, a priority-based dynamic load transfer （PDLT） algorithm is proposed. The dynamic vertical handoffs by call admission control are jointly determined by the network conditions and the traffic characteristics in combination with the location-condition of mobile terminals. When there is no bandwidth resource available in the cellular network or WLAN, the proposed PDLT algorithm allows an incoming voice call or data call within the overlapping area of the cellular network and the WLAN to be directed to the spare network; meanwhile, by dynamically computing the occupancy of the bandwidth resource, the proposed PDLT algorithm also allows an ongoing voice call or data communication to be transferred to the network with a sufficient bandwidth resource according to the given threshold to balance the number of voice/data calls in the two networks. The analysis results of a two-dimensional Markov model and the simulation results show that the PDLT algorithm can effectively enhance the whole integrated network＇ s traffic, reduce the blocking probability of new calls and increase the data throughput, and thus decrease the response time for various services.