【摘要】：隨著移動(dòng)終端數(shù)量的增加,和用戶不斷增長(zhǎng)的對(duì)視頻業(yè)務(wù)等高速率業(yè)務(wù)的需求,單一的無(wú)線通信技術(shù)不再能滿足用戶的通信需要。LTE和WLAN兩種無(wú)線網(wǎng)絡(luò)技術(shù)在覆蓋范圍、吞吐量、開銷和移動(dòng)性支持等方面上具有不同的特性。通過(guò)LTE與WLAN網(wǎng)絡(luò)融合,可以使用戶同時(shí)獲得兩種技術(shù)帶來(lái)的好處。LWA作為3GPP最新提出的異構(gòu)網(wǎng)絡(luò)融合架構(gòu)之一,以eNB作為分流錨點(diǎn),可以將部分LTE的業(yè)務(wù)分流給WLAN。本文主要基于LWA進(jìn)行協(xié)議設(shè)計(jì)和分流算法改進(jìn),實(shí)現(xiàn)有效的業(yè)務(wù)分流。本文首先提出了一種新型MAC復(fù)用方法和系統(tǒng),避免高優(yōu)先級(jí)的分裂承載占用低優(yōu)先級(jí)非分裂承載的上行傳輸資源。然后提出了一種分布式的適用于LWA的接入點(diǎn)選擇方法ACSM,在多模終端進(jìn)行選擇LTE小區(qū)時(shí)考慮與之關(guān)聯(lián)的WLAN側(cè)的網(wǎng)絡(luò)性能,并通過(guò)改進(jìn)TOPSIS算法,為用戶提供滿足多種偏好的小區(qū)選擇。最后提出了一種異構(gòu)網(wǎng)絡(luò)中的帶寬分配方法,為不同業(yè)務(wù)建立不同的效用模型,通過(guò)網(wǎng)絡(luò)側(cè)和用戶側(cè)的相互迭代和少量的信令交互實(shí)現(xiàn)最優(yōu)的帶寬分配。本文還搭建了 LWA系統(tǒng)仿真平臺(tái),驗(yàn)證了本文所提算法。
[Abstract]:With the increase of the number of mobile terminals and the increasing demand of users for high-speed services such as video services, a single wireless communication technology can no longer meet the communication needs of users. LTE and WLAN wireless network technology in the coverage, throughput, Overhead and mobility support have different characteristics. Through the integration of LTE and WLAN network, users can get the benefits of the two technologies at the same time. As one of the latest heterogeneous network convergence architecture proposed by 3GPP, LWA can distribute part of the LTE services to WLAN. with eNB as the streaming anchor. This paper mainly based on LWA protocol design and shunt algorithm improvement to achieve effective service streaming. In this paper, a new MAC multiplexing method and system is proposed to avoid the high priority splitting load from occupying the uplink transmission resource with low priority and non-splitting load. Then, a distributed access point selection method suitable for LWA is proposed. ACSM, considers the network performance of the associated WLAN side when selecting LTE cells at multi-mode terminals, and improves the TOPSIS algorithm. To provide users with a variety of preferences to meet the cell selection. Finally, a bandwidth allocation method in heterogeneous networks is proposed, which establishes different utility models for different services, and achieves optimal bandwidth allocation through iteration between network side and user side and a small amount of signaling interaction. The LWA system simulation platform is also built to verify the proposed algorithm.
【學(xué)位授予單位】：南京理工大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類號(hào)】：TN929.5;TN925.93

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本文編號(hào)：2273458