【摘要】：針對(duì)現(xiàn)有多屬性切換算法沒(méi)有考慮所切換的目標(biāo)網(wǎng)絡(luò)負(fù)載、難以保障網(wǎng)絡(luò)服務(wù)質(zhì)量的不足,提出基于改進(jìn)多屬性判決的異構(gòu)網(wǎng)絡(luò)接入算法。首先,采用萬(wàn)有引力模型簡(jiǎn)化了復(fù)雜多屬性判決算法的計(jì)算過(guò)程,減少了網(wǎng)絡(luò)接入切換執(zhí)行時(shí)間;其次,在切換執(zhí)行前,通過(guò)加入負(fù)載判決模塊計(jì)算出最優(yōu)目標(biāo)網(wǎng)絡(luò)、次優(yōu)目標(biāo)網(wǎng)絡(luò)負(fù)載,從而選出最終切換的目標(biāo)網(wǎng)絡(luò)。采用MATLAB和NS2等仿真工具,搭建了WLAN和UMTS融合的異構(gòu)網(wǎng)絡(luò)仿真環(huán)境。仿真結(jié)果表明,算法明顯提高了整體網(wǎng)絡(luò)的負(fù)載均衡度和資源利用率,有效降低了移動(dòng)終端的切換阻塞率。
[Abstract]:Because the existing multi-attribute handoff algorithms do not consider the target network load and it is difficult to guarantee the QoS of the network, an improved multi-attribute decision based heterogeneous network access algorithm is proposed. Firstly, the calculation process of complex multi-attribute decision algorithm is simplified by using universal gravity model, and the execution time of network access handover is reduced. Secondly, the optimal target network is calculated by adding load decision module before handover execution. The suboptimal target network load is selected to select the target network that is finally switched. The heterogeneous network simulation environment of WLAN and UMTS is built by using MATLAB and NS2 simulation tools. The simulation results show that the algorithm can significantly improve the load balance and resource utilization of the whole network and effectively reduce the handoff blocking rate of the mobile terminal.
【作者單位】： 大連理工大學(xué)計(jì)算機(jī)科學(xué)與技術(shù)學(xué)院;大連大學(xué)信息工程學(xué)院;
【基金】：國(guó)家杰出青年基金(61225010) 國(guó)家基金重點(diǎn)項(xiàng)目(61432002)資助
【分類(lèi)號(hào)】：TN915.6

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本文編號(hào)：2258188