TDMA無線Mesh網(wǎng)絡(luò)中基于面積頻譜效率的資源分配技術(shù)研究
發(fā)布時(shí)間：2018-07-20 16:17
【摘要】：在未來的無線通信領(lǐng)域中,無線網(wǎng)狀網(wǎng)能夠?yàn)橛脩籼峁└鼉?yōu)質(zhì)的服務(wù)。它能夠動(dòng)態(tài)地進(jìn)行自組織、自配置,為移動(dòng)的或靜止的終端提供健壯的、可靠的和成本較低的網(wǎng)絡(luò)連接,它代表著無線網(wǎng)絡(luò)的又一大跨越,有著廣闊的應(yīng)用前景。然而,作為一項(xiàng)新的網(wǎng)絡(luò)技術(shù),無線網(wǎng)狀網(wǎng)在實(shí)際應(yīng)用中面臨著很多挑戰(zhàn),例如能量效率較低、接口技術(shù)復(fù)雜、可擴(kuò)展性和安全性存在隱患等。針對能量效率較低的問題工業(yè)界和學(xué)術(shù)界已經(jīng)有很多人對此做了相關(guān)的研究。本文采用一種新的量化無線網(wǎng)狀網(wǎng)能量效率的準(zhǔn)則:面積頻譜效率。用它來衡量網(wǎng)絡(luò)高速傳輸數(shù)據(jù)的頻譜和空間上的能耗,該準(zhǔn)則綜合考慮了影響能耗的吞吐量、功率及覆蓋面積等因素。本文研究基于時(shí)分多址接入的無線網(wǎng)狀網(wǎng)系統(tǒng),以面積頻譜效率為準(zhǔn)則,進(jìn)行了兩方面的研究。首先在時(shí)分多址接入系統(tǒng)中,時(shí)隙只分配給一條鏈路,鏈路之間不存在相互干擾,得到調(diào)度的節(jié)點(diǎn)對構(gòu)成了點(diǎn)對點(diǎn)信道。在此場景下,以面積頻譜效率為優(yōu)化目標(biāo),考慮節(jié)點(diǎn)的功率控制,建立優(yōu)化模型。其次,在多跳網(wǎng)絡(luò)中將時(shí)分多址接入擴(kuò)展至空間時(shí)分多址接入�？臻g時(shí)分多址接入的顯著優(yōu)勢在于空間距離足夠遠(yuǎn)的節(jié)點(diǎn)能夠重復(fù)利用時(shí)隙,使網(wǎng)絡(luò)頻譜的利用率有所提高。在此系統(tǒng)下,本文將時(shí)隙分配給兩條鏈路,得到調(diào)度的鏈路對構(gòu)成X信道,此時(shí)鏈路之間存在干擾,因此需要利用干擾模型來分配資源以達(dá)到優(yōu)化面積頻譜效率的目的。根據(jù)優(yōu)化問題,本文在求解優(yōu)化模型時(shí),將問題分解為兩部分:功率的分配和時(shí)隙的分配。在分配功率時(shí),我們采用非線性單純形法和內(nèi)點(diǎn)罰函數(shù)法求解約束條件下的非線性優(yōu)化問題,而在分配時(shí)隙時(shí),我們利用分支定界法求解0-1整數(shù)規(guī)劃模型。最后,本文通過仿真給出了面積頻譜效率在不同仿真參數(shù)環(huán)境下的變化趨勢。在空間時(shí)分多址接入的無線網(wǎng)狀網(wǎng)中,利用時(shí)隙復(fù)用,可以提高面積頻譜效率。為了觀察噪聲對面積頻譜效率的影響,分別在這兩種場景中對其進(jìn)行了仿真,仿真結(jié)果表明,噪聲的增加會(huì)降低面積頻譜效率。
[Abstract]:In the future wireless communication field, wireless mesh network can provide users with better service. It can dynamically self-organize, self-configure, provide robust, reliable and low-cost network connection for mobile or static terminals. It represents another big leap of wireless network and has a broad application prospect. However, as a new network technology, wireless mesh networks are faced with many challenges in practical applications, such as low energy efficiency, complex interface technology, hidden dangers in scalability and security, and so on. There have been many researches on energy efficiency in industry and academia. In this paper, a new energy efficiency criterion for quantized wireless mesh networks, area spectrum efficiency, is adopted. It is used to measure the spectral and spatial energy consumption of high-speed data transmission in the network. This criterion takes into account the factors affecting the throughput, power and coverage area of energy consumption. In this paper, a wireless mesh network system based on time division multiple access (TDMA) is studied. In the TDMA system, the time slot is allocated to only one link, and there is no interference between the links. In this scenario, the area spectrum efficiency is taken as the optimization objective, and the power control of the node is considered, and the optimization model is established. Secondly, time division multiple access is extended to spatial time division multiple access in multi-hop networks. The significant advantage of spatial-time-division multiple access is that the nodes which are far enough in space can reuse the time slots and improve the efficiency of the network spectrum. In this system, the time slots are allocated to two links, and the scheduled link pairs constitute X channel. In this case, there is interference between the links, so the interference model is needed to allocate resources to optimize the area spectrum efficiency. According to the optimization problem, when solving the optimization model, the problem is decomposed into two parts: power allocation and slot allocation. In the case of power allocation, we use nonlinear simplex method and interior point penalty function method to solve nonlinear optimization problems under constrained conditions, while in allocating time slots, we use the branch and bound method to solve the 0-1 integer programming model. Finally, the change trend of area spectrum efficiency under different simulation parameters is given by simulation. In spatial time division multiple access (STDMA) wireless mesh networks, the area spectrum efficiency can be improved by using time slot multiplexing. In order to observe the effect of noise on the area spectrum efficiency, the two scenarios are simulated. The simulation results show that the increase of noise can reduce the area spectrum efficiency.
【學(xué)位授予單位】：西安電子科技大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2014
【分類號】：TN929.5
本文編號：2134073
[Abstract]:In the future wireless communication field, wireless mesh network can provide users with better service. It can dynamically self-organize, self-configure, provide robust, reliable and low-cost network connection for mobile or static terminals. It represents another big leap of wireless network and has a broad application prospect. However, as a new network technology, wireless mesh networks are faced with many challenges in practical applications, such as low energy efficiency, complex interface technology, hidden dangers in scalability and security, and so on. There have been many researches on energy efficiency in industry and academia. In this paper, a new energy efficiency criterion for quantized wireless mesh networks, area spectrum efficiency, is adopted. It is used to measure the spectral and spatial energy consumption of high-speed data transmission in the network. This criterion takes into account the factors affecting the throughput, power and coverage area of energy consumption. In this paper, a wireless mesh network system based on time division multiple access (TDMA) is studied. In the TDMA system, the time slot is allocated to only one link, and there is no interference between the links. In this scenario, the area spectrum efficiency is taken as the optimization objective, and the power control of the node is considered, and the optimization model is established. Secondly, time division multiple access is extended to spatial time division multiple access in multi-hop networks. The significant advantage of spatial-time-division multiple access is that the nodes which are far enough in space can reuse the time slots and improve the efficiency of the network spectrum. In this system, the time slots are allocated to two links, and the scheduled link pairs constitute X channel. In this case, there is interference between the links, so the interference model is needed to allocate resources to optimize the area spectrum efficiency. According to the optimization problem, when solving the optimization model, the problem is decomposed into two parts: power allocation and slot allocation. In the case of power allocation, we use nonlinear simplex method and interior point penalty function method to solve nonlinear optimization problems under constrained conditions, while in allocating time slots, we use the branch and bound method to solve the 0-1 integer programming model. Finally, the change trend of area spectrum efficiency under different simulation parameters is given by simulation. In spatial time division multiple access (STDMA) wireless mesh networks, the area spectrum efficiency can be improved by using time slot multiplexing. In order to observe the effect of noise on the area spectrum efficiency, the two scenarios are simulated. The simulation results show that the increase of noise can reduce the area spectrum efficiency.
【學(xué)位授予單位】：西安電子科技大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2014
【分類號】：TN929.5
【參考文獻(xiàn)】
相關(guān)碩士學(xué)位論文 前1條
1 常穎華;無線Mesh網(wǎng)絡(luò)的媒體接入控制策略與分組調(diào)度算法研究[D];重慶大學(xué);2012年
，本文編號：2134073
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