高能效頻譜共享協(xié)作通信機制研究
發(fā)布時間：2019-06-27 14:58
【摘要】：無線通信業(yè)務需求的持續(xù)增長,使得無線資源變得十分稀缺的同時產(chǎn)業(yè)能耗也越來越大。協(xié)作頻譜共享技術(shù)可以在不改變現(xiàn)有頻譜分配總體結(jié)構(gòu)下,采用靈活的頻譜接入技術(shù),通過授權(quán)系統(tǒng)和非授權(quán)系統(tǒng)之間無線資源的共享和管理來提高頻譜的利用率和通信系統(tǒng)的能效。協(xié)作頻譜共享可分為underlay(共存)和overlay(覆蓋)兩種方式。在共存的共享方式下,只要非授權(quán)系統(tǒng)對授權(quán)系統(tǒng)的干擾低于授權(quán)系統(tǒng)可容忍的干擾限制,非授權(quán)系統(tǒng)就可與授權(quán)系統(tǒng)同時共享授權(quán)頻帶。由于授權(quán)用戶無需知道非授權(quán)用戶的存在,不會給授權(quán)用戶帶來額外的開銷；但是,授權(quán)系統(tǒng)的干擾限制是一個上限值,因此非授權(quán)系統(tǒng)為了避免對授權(quán)系統(tǒng)的干擾將采用相對較小的功率來傳輸；即使在授權(quán)頻譜完全空閑的情況下,非授權(quán)系統(tǒng)也不會用高的功率來傳輸數(shù)據(jù),這會影響通信系統(tǒng)的頻譜和功率效率。對于覆蓋式共享,在滿足授權(quán)系統(tǒng)通信需求的前提下,提供空閑頻譜給非授權(quán)系統(tǒng)使用,授權(quán)系統(tǒng)和非授權(quán)系統(tǒng)并不同時占用信道。非授權(quán)系統(tǒng)機會式的接入頻譜會帶來信道反饋和信令等額外開銷,但是非授權(quán)系統(tǒng)的傳輸功率不會受到干擾的限制,因此有可能提高系統(tǒng)的能效。本文將側(cè)重于覆蓋式高能效協(xié)作頻譜共享通信機制的研究,主要創(chuàng)新點如下： 1.本文分析了單傳輸時間間隔(TTI)調(diào)度的協(xié)作頻譜共享方式下資源分配問題。單TTI調(diào)度的頻譜共享方式是指,一個TTI內(nèi)通信系統(tǒng)中各鏈路的信道狀態(tài)保持不變,非授權(quán)次級系統(tǒng)在一個TTI內(nèi)協(xié)作授權(quán)主系統(tǒng)的傳輸,要求在該TTI內(nèi)立即獲得一定的傳輸時間作為回報。因此,主系統(tǒng)和次級系統(tǒng)的協(xié)作共享僅依賴于一個TTI內(nèi)各鏈路的信道狀態(tài)。本文分析了在保證授權(quán)系統(tǒng)和非授權(quán)系統(tǒng)服務質(zhì)量的同時,最小化頻譜共享協(xié)作通信系統(tǒng)能耗的無線資源分配問題,通過凸優(yōu)化理論得到了最優(yōu)的時間和功率分配的封閉形式的解。進一步,本文分析了不同協(xié)作方式下協(xié)作頻譜共享通信系統(tǒng)的能效性能。 2.本文提出了多TTIs調(diào)度的頻譜共享機制,并且考慮了接入切換代價對協(xié)作頻譜通信系統(tǒng)性能的影響。多TTIs調(diào)度的頻譜共享方式是指,多個TTIs間通信系統(tǒng)中各鏈路的信道狀態(tài)是變化的,次級系統(tǒng)根據(jù)信道的狀態(tài)自適應地選擇在不同的TTIs進行中繼或接入。因此,多TTIs調(diào)度能有效地利用信道衰落的時間分集增益大大提高頻譜共享通信系統(tǒng)的性能。本文分析了在多TTIs調(diào)度的頻譜共享方式下,在授權(quán)系統(tǒng)和非授權(quán)系統(tǒng)的能量限制和授權(quán)系統(tǒng)服務質(zhì)量的限制下,最大化協(xié)作頻譜共享通信系統(tǒng)吞吐量的問題；并將其轉(zhuǎn)化為受限的馬爾科夫決策問題,利用拉格朗日方法和Q-學習算法得到了最優(yōu)的頻譜接入策略。但是,該算法的計算復雜度將隨著通信系統(tǒng)中鏈路數(shù)的增加呈指數(shù)激增。 3.為了解決馬爾科夫決策算法計算復雜度的問題,本文建立了基于勞動-消費模型的多TTIs調(diào)度的協(xié)作共享機制。在該模型中,在保證授權(quán)系統(tǒng)性能的前提下,非授權(quán)系統(tǒng)中的次級用戶(“勞動者”)通過中繼(“勞動”)授權(quán)系統(tǒng)中主用戶的信息來獲得可在系統(tǒng)中傳輸?shù)墓β屎蜁r間(資源)用于自己信息的傳輸(“消費”)；而信道的狀態(tài)可視為“市場環(huán)境”,勞動者可以根據(jù)所擁有的資源和市場環(huán)境來決定勞動還是消費。在該模型下次級用戶可以根據(jù)信道狀態(tài)自適應地選擇中繼和接入的時機,提高共享通信系統(tǒng)的性能。進一步,本文分析了多用戶協(xié)作的多TTIs調(diào)度的頻譜共享機制,討論了次級用戶接入等待時延對系統(tǒng)性能和用戶接入數(shù)量的影響。
[Abstract]:The continuous growth of the demand for wireless communication services makes wireless resources become scarce and the industry's energy consumption is growing. The cooperative spectrum sharing technology can improve the utilization rate of the frequency spectrum and the energy efficiency of the communication system by adopting a flexible spectrum access technology without changing the overall structure of the existing frequency spectrum allocation, and by the sharing and management of the wireless resources between the authorization system and the non-authorization system. The collaboration frequency spectrum sharing can be divided into two ways: an underlay (co-existence) and an overlay (overlay). In the coexistence sharing mode, the non-authorization system can share the authorization frequency band with the authorization system at the same time as long as the interference of the unauthorized system to the authorization system is lower than the tolerable interference limit of the authorization system. since the authorized user does not need to know the presence of the non-authorized user, no additional overhead is brought to the authorized user; however, the interference limit of the authorization system is an upper limit value, and therefore the non-authorization system will adopt a relatively small power to transmit in order to avoid the interference to the authorization system; Even in the case where the authorized spectrum is completely idle, the non-authorization system will not transmit data with high power, which may affect the spectrum and power efficiency of the communication system. For overlay sharing, on the premise of meeting the communication requirement of the authorization system, the idle spectrum is provided to the non-authorization system, and the authorization system and the non-authorization system do not occupy the channel at the same time. The access spectrum of the non-authorization system opportunistic type results in additional overhead such as channel feedback and signaling, but the transmission power of the non-authorization system is not limited by the interference, and therefore it is possible to improve the energy efficiency of the system. This paper will focus on the research of the coverage-type energy-efficient cooperative spectrum sharing communication mechanism. The main innovation points are as follows: 1. In this paper, the resource allocation in the cooperative spectrum sharing mode of single transmission time interval (TTI) scheduling is analyzed. the frequency spectrum sharing mode of the single TTI scheduling is that the channel state of each link in the communication system in one TTI is kept unchanged, and the non-authorization secondary system is in cooperation with the transmission of the main system in one TTI, and a certain transmission time is required to be taken as the back-back in the TTI the co-sharing of the primary system and the secondary system is therefore dependent only on the channel shape of the links within one tti, In this paper, the wireless resource allocation problem of the energy consumption of the spectrum sharing cooperative communication system is minimized while the service quality of the authorization system and the non-authorization system are guaranteed, and the optimal time and power distribution closed form is obtained by the convex optimization theory. In this paper, the energy efficiency of the cooperative spectrum sharing and communication system is analyzed in this paper. 2. The spectrum sharing mechanism of multi-TIs scheduling is proposed in this paper, and the performance of the cooperative spectrum communication system is considered in consideration of the cost of the access handover. The spectrum sharing mode of the multi-TIs scheduling means that the channel state of each link in the multiple TIs communication system is changed, and the secondary system adaptively selects to relay the different TIs according to the state of the channel. and therefore, the multi-TIs scheduling can effectively utilize the time diversity gain of the channel fading to greatly improve the spectrum sharing communication system, The paper analyzes the problem of maximizing the throughput of the cooperative spectrum sharing communication system under the limitation of the energy limit of the authorization system and the non-authorization system and the service quality of the authorization system in the frequency spectrum sharing mode of the multi-TIs scheduling, and converts it into a limited Markov decision. The optimal spectral joint is obtained by the Lagrange method and the Q-learning algorithm. a policy is entered. However, the computational complexity of the algorithm will refer to the increase in the number of links in the communication system 3. In order to solve the problem of the computational complexity of the Markov decision algorithm, the association of multi-TIs scheduling based on the labor-consumption model is established in this paper. As a sharing mechanism, in this model, the system of authorization is guaranteed. On the premise that the secondary user ("a worker") in the non-authorization system obtains the transmission ("consumption") of the power and time (resources) that can be transmitted in the system for the own information through the information of the main user in the relay ("labor") authorization system, and the state of the channel can be considered as a "trunk>" market entry "< / trunk>, the worker can decide on the basis of the resources and the market environment And the next user of the model can adaptively select the timing of the relay and the access according to the channel state so as to improve the sharing communication. The performance of the system is further analyzed. The spectrum sharing mechanism of multi-user cooperative multi-TIs scheduling is analyzed, and the system performance and user access are discussed.
【學位授予單位】：北京郵電大學
【學位級別】：博士
【學位授予年份】：2014
【分類號】：TN92
本文編號：2506895
[Abstract]:The continuous growth of the demand for wireless communication services makes wireless resources become scarce and the industry's energy consumption is growing. The cooperative spectrum sharing technology can improve the utilization rate of the frequency spectrum and the energy efficiency of the communication system by adopting a flexible spectrum access technology without changing the overall structure of the existing frequency spectrum allocation, and by the sharing and management of the wireless resources between the authorization system and the non-authorization system. The collaboration frequency spectrum sharing can be divided into two ways: an underlay (co-existence) and an overlay (overlay). In the coexistence sharing mode, the non-authorization system can share the authorization frequency band with the authorization system at the same time as long as the interference of the unauthorized system to the authorization system is lower than the tolerable interference limit of the authorization system. since the authorized user does not need to know the presence of the non-authorized user, no additional overhead is brought to the authorized user; however, the interference limit of the authorization system is an upper limit value, and therefore the non-authorization system will adopt a relatively small power to transmit in order to avoid the interference to the authorization system; Even in the case where the authorized spectrum is completely idle, the non-authorization system will not transmit data with high power, which may affect the spectrum and power efficiency of the communication system. For overlay sharing, on the premise of meeting the communication requirement of the authorization system, the idle spectrum is provided to the non-authorization system, and the authorization system and the non-authorization system do not occupy the channel at the same time. The access spectrum of the non-authorization system opportunistic type results in additional overhead such as channel feedback and signaling, but the transmission power of the non-authorization system is not limited by the interference, and therefore it is possible to improve the energy efficiency of the system. This paper will focus on the research of the coverage-type energy-efficient cooperative spectrum sharing communication mechanism. The main innovation points are as follows: 1. In this paper, the resource allocation in the cooperative spectrum sharing mode of single transmission time interval (TTI) scheduling is analyzed. the frequency spectrum sharing mode of the single TTI scheduling is that the channel state of each link in the communication system in one TTI is kept unchanged, and the non-authorization secondary system is in cooperation with the transmission of the main system in one TTI, and a certain transmission time is required to be taken as the back-back in the TTI the co-sharing of the primary system and the secondary system is therefore dependent only on the channel shape of the links within one tti, In this paper, the wireless resource allocation problem of the energy consumption of the spectrum sharing cooperative communication system is minimized while the service quality of the authorization system and the non-authorization system are guaranteed, and the optimal time and power distribution closed form is obtained by the convex optimization theory. In this paper, the energy efficiency of the cooperative spectrum sharing and communication system is analyzed in this paper. 2. The spectrum sharing mechanism of multi-TIs scheduling is proposed in this paper, and the performance of the cooperative spectrum communication system is considered in consideration of the cost of the access handover. The spectrum sharing mode of the multi-TIs scheduling means that the channel state of each link in the multiple TIs communication system is changed, and the secondary system adaptively selects to relay the different TIs according to the state of the channel. and therefore, the multi-TIs scheduling can effectively utilize the time diversity gain of the channel fading to greatly improve the spectrum sharing communication system, The paper analyzes the problem of maximizing the throughput of the cooperative spectrum sharing communication system under the limitation of the energy limit of the authorization system and the non-authorization system and the service quality of the authorization system in the frequency spectrum sharing mode of the multi-TIs scheduling, and converts it into a limited Markov decision. The optimal spectral joint is obtained by the Lagrange method and the Q-learning algorithm. a policy is entered. However, the computational complexity of the algorithm will refer to the increase in the number of links in the communication system 3. In order to solve the problem of the computational complexity of the Markov decision algorithm, the association of multi-TIs scheduling based on the labor-consumption model is established in this paper. As a sharing mechanism, in this model, the system of authorization is guaranteed. On the premise that the secondary user ("a worker") in the non-authorization system obtains the transmission ("consumption") of the power and time (resources) that can be transmitted in the system for the own information through the information of the main user in the relay ("labor") authorization system, and the state of the channel can be considered as a "trunk>" market entry "< / trunk>, the worker can decide on the basis of the resources and the market environment And the next user of the model can adaptively select the timing of the relay and the access according to the channel state so as to improve the sharing communication. The performance of the system is further analyzed. The spectrum sharing mechanism of multi-user cooperative multi-TIs scheduling is analyzed, and the system performance and user access are discussed.
【學位授予單位】：北京郵電大學
【學位級別】：博士
【學位授予年份】：2014
【分類號】：TN92
【參考文獻】
相關(guān)期刊論文 前2條
1 陶曉明;肖瀟;陸建華;;基于多域協(xié)同的綠色無線通信系統(tǒng)體系構(gòu)架[J];電信科學;2011年03期
2 佘小勇;;綠色通信:引發(fā)通信業(yè)的新變革[J];中國電信業(yè);2008年10期
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