CN101119153A - Method for selecting wireless digital relay system and transmission time spacing - Google Patents

Method for selecting wireless digital relay system and transmission time spacing Download PDF

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CN101119153A
CN101119153A CN 200610089118 CN200610089118A CN101119153A CN 101119153 A CN101119153 A CN 101119153A CN 200610089118 CN200610089118 CN 200610089118 CN 200610089118 A CN200610089118 A CN 200610089118A CN 101119153 A CN101119153 A CN 101119153A
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transmission
time
downlink
uplink
wireless
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CN 200610089118
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Chinese (zh)
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CN101119153B (en )
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刁心玺
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中兴通讯股份有限公司
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    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02DCLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THIR OWN ENERGY USE
    • Y02D70/00Techniques for reducing energy consumption in wireless communication networks

Abstract

The present invention discloses a method of wireless digital relay system and transmission time interval selection, which is suitable for time division duplex wireless communication system. The relay system comprises at least a wireless digital repeater, at least a base station, at least a mobile terminal. Linkage between the base station and the wireless digital repeater is divided into a first uplink and a first downlink; the linkage between the wireless digital repeater and the mobile terminal is divided into a second uplink and a second downlink; the linkage between the base station and the mobile terminal is divided into a third uplink and a third downlink; the first uplink and the first downlink adopt the fixed transmission time interval; the second uplink, the second downlink, the third uplink and the third downlink select adaptively the transmission time interval according to the channel quality of corresponding linkage. By supporting flexible transmission interval, the invention uses the optimal transmission time interval in different channel conditions, optimizes transmission efficiency and time delay, and saves transmission power.

Description

一种无线数字中继系统和传输时间间隔选取方法技术领域本发明涉及通信领域,特别是涉及时分双工无线通信系统中灵活选取传输时间间隔(Transmit Time Interval , TTI)的方法。 A radio relay system and a digital transmission time interval selected TECHNICAL FIELD The present invention relates to the field of communications, particularly to a method in a time division duplex wireless communication system flexibly select a transmission time interval (Transmit Time Interval, TTI) of. 背景技术欧洲信息化社会技术研究中设立的研究项目IST-2003-507581 WINNER D3.4给出的基于固定无线数字中继器的蜂窝移动通信系统无线接入网(Radio Access Network, RAN)部分的基本结构如图1所示:若千个无线数字中继器101a〜101n按照一定的方式分布在蜂窝基站102的周围,移动终端103通过某个或某些无线数字中继器与蜂窝基站102建立通信链路,图1中是通过一个无线数字中继器101f以两跳的方式与蜂窝基站102建立通信链路。 Background of Information Technology Society established European research project IST-2003-507581 WINNER D3.4 given cellular mobile communication system based on fixed wireless digital relay radio access network (Radio Access Network, RAN) part the basic structure shown in Figure 1: If one thousand 101a~101n wireless digital repeater in a certain manner distributed about the cellular base station 102, the mobile terminal 103 by establishing one or some of the wireless digital cellular base station 102 and the relay communication link, in FIG. 1 is a communication link through a digital wireless two-hop relay 101f manner to cellular base station 102. 中继装置管理单元104对无线数字中继器101a〜101n进行控制,它对无线数字中继器101a〜101ii的工作时隙、工作频点、编码调制方式等进行综合管理。 The relay apparatus management unit 104 controls the wireless digital relay 101a~101n, integrated management of its wireless digital repeater 101a~101ii working slot, working frequency, coding and modulation scheme. 现有固定式TDD (Time Division Duplex,时分双工)无线数字中继系统的一个缺点是不支持灵活的传输时间间隔,这样就无法在不同信道环境下使传输效率和时延得到优化,也不利于移动终端通过时间分集来降低发射功率。 Fixed conventional TDD (Time Division Duplex, time division duplex) digital radio relay system a drawback is not supported by the flexible transmission time interval, so that the transmission efficiency can not be at different delays and channel environment has been optimized, nor benefits the mobile terminal transmit power is reduced by time diversity. 发明内容本发明所要解决的技术问题在于提供一种无线数字中继系统和传输时间间隔选取方法,用于在不同信道环境下通过使用最优的传输时间间隔来优化传输效率和时延,并且移动终端通过时间分集实现节省发射功率。 DISCLOSURE Technical Problem The present invention is to provide a digital radio relay system and a method of selecting a transmission time interval for channels in different environments by using the optimum transmission time interval to optimize the transmission efficiency and delay, and the mobile the time diversity achieved by the terminal transmitting power saving. 为了实现上述目的,本发明提供了一种无线数字中继系统,适用于时分双工无线通信系统,该中继系统包括至少一个无线数字中继器、至少一个基站、 至少一个移动终端,其特征在于,所述基站与所述无线数字中继器之间的链接分为第一上行链路、第一下行链路;所述无线数字中继器与所述移动终端之间的链接分为第二上行链路、第 To achieve the above object, the present invention provides a digital radio relay system for a time division duplex wireless communication system, the wireless relay system comprises at least one digital repeater, the at least one base station, the at least one mobile terminal, wherein in that the link between the base station and the repeater is divided into a first digital wireless uplink, a first downlink; digital radio link between the relay and the mobile terminals are divided into second uplink, the

二卜行链路;所述基站与所述移动终端之间的链接分为第三上行链路、第二卜行链路;所述第一上行链路、所述第一下行链路釆用固定的传输时间间隔;所述第二上行链路、所述第二下行链路、所述第三上行链路、所述第三下行链路根据对应链路的信道质量情况自适应选择传输时间间隔。 Bu two downlink; link between the base station and the mobile terminal into a third uplink, downlink second BU; the first uplink, the first downlink preclude the use of fixed transfer time interval; the second uplink, downlink and the second, the third uplink, adaptive selection of the third downlink transmission time interval according to the channel quality condition corresponding to the link. 所述的无线数字中继系统,其中,所述无线数字中继器、所述基站之间和所述无线数字中继器、所述移动终端之间采用帧结构进行数据传输,该帧结构包含支持所述无线数字中继器在面向所述基站的天线和面向所述移动终端的天线上同时接收信号或者同时发射信号的时隙。 The digital radio relay system, wherein the wireless digital repeater, between the base station and the wireless digital repeater, between the mobile terminal using data transmission frame structure, the frame structure comprising the support of the mobile wireless digital repeater receiving signals on the slot antennas of the terminal or simultaneously transmit signals at the antenna of the base station and facing faces. 所述的无线数字中继系统,其中,所述时分双工无线通信系统为时分同步码分多址接入系统。 The digital radio relay system, wherein the wireless communication system is a time division duplex Time Division Synchronous Code Division Multiple Access system. 所述的无线数字中继系统,其中,在所述基站的覆盖区域内设置至少一个PHS基站,部分或者全部所述无线数字中继器与所述PHS基站共址设置,且与所述PHS基站共址设置的无线数字中继器与所述PHS基站共享供电线路或共享电源。 The digital radio relay systems, wherein at least a PHS base stations within the coverage area of ​​the base station, some or all of the wireless digital relay and the PHS base station disposed co-located, and the PHS base station provided co-located wireless digital repeaters share a power line and the PHS base station or shared power. 为了实现上述目的,本发明还提供了一种基于所述系统的传输时间间隔的选取方法,其特征在于,包括:步骤一,设置所述基站与所述无线数字中继器之间通过第一上行链路、第一下行链路建立链接;设置所述无线数字中继器与所述移动终端之间通过第二上行链路、第二下行链路建立链接;设置所述基站与所述移动终端之间通过第三上行链路、第三下行链路建立链接;步骤二,所述第一上行链路、所述第一下行链路以固定传输时间间隔进行数据传输;同时,对所述移动终端至所述无线数字中继器的信道质量进行判断, 自适应选择所述第二上行链路、所述第二下行链路的传输时间间隔;对所述移动终端至所述基站的信道质量进行判断,自适应选择所述第三上行链路、所述第三下行链路的传输时间间隔。 To achieve the above object, the present invention also provides a method of selecting a transmission time interval based on said system, characterized by comprising: a step between the first, provided the base station and the wireless digital repeater uplink, downlink first link is established; the second uplink, downlink establishes the link between the second set of the digital wireless relay and the mobile terminal; provided the base station and the through third uplink, third downlink link established between the mobile terminal; step two, the first uplink, the first downlink transmission in a fixed time interval for data transmission; the same time, the digital mobile terminal to the wireless relay channel quality determination, selecting the second adaptive uplink, downlink transmission time of the second interval; the mobile terminal to the base station determining a channel quality, selects the third adaptive uplink, downlink transmission time of the third interval. 所述的传输时间间隔的选取方法,其中,所述歩骤-、所述步骤二之间, 还包括:步骤61,通过所述基站接收所述移动终端的业务请求,并根据该业务请求获得所述移动终端所需要的业务质量和无线资源; The method of selecting the transmission time interval, wherein said step ho -, between said two steps, further comprising: a step 61, the mobile terminal receives the service request through the base station, according to the service request and to obtain the mobile terminal required quality of service and the radio resource;

步骤62,通过所述基站接收所述移动终端对信道的测量数据;步骤63,根据所述测量数据建立所述基站与所述移动终端之间的链接关系或通过所述无线数字中继器建立所述基站与所述移动终端之间的链接关系。 Step 62, the mobile terminal receives the measurement data of the channel by the base station; step 63 to establish a link relationship between the base station and the mobile terminal according to the measurement data or established through the wireless digital repeater the link relation between the base station and the mobile terminal. 所述的传输时间间隔的选取方法,其中,所述对所述移动终端至所述无线数字中继器的信道质量进行判断的步骤中,当信干比小于一第一预设门限、信道的衰落因子大于一第二预设门限,且所述系统接收信号的幅度衰落过零点的频率大于一预定值时,则信道质量差。 The method step of selecting said transmission time interval, wherein the mobile terminal to the channel quality wireless digital relay to judge, when the SIR is less than a first predetermined threshold, channel amplitude fading factor is larger than a second predetermined threshold, and the system receives signals over fading frequency is greater than a predetermined zero value, the channel quality is poor. 所述的传输时间间隔的选取方法,其中,所述第二上行链路、所述第二下行链路的传输时间间隔为5ms。 The method of selecting the transmission time interval, wherein the second uplink and the second downlink transmission time interval is 5ms. 所述的传输时间间隔的选取方法,其中,所述对所述移动终端至所述基站的信道质量进行判断的步骤中,当信干比大于一第-预设门限、信道的衰落因子小于一第二预设门限,且所述系统接收信号的幅度衰落过零点的频率小于一预定值时,则信道质量好。 Step selection method according to a transmission time interval, wherein the mobile terminal to the channel quality of the base station judges, when the SIR is greater than a second - preset threshold, the channel is a fading factor of less than the second preset threshold, and the amplitude of the fading signal received through the system is less than a predetermined value, the channel quality is good frequency zero. 所述的传输时间间隔的选取方法,其中,所述第三上行链路、所述第三下行链路的传输时间间隔大于或等于20ms。 The method of selecting the transmission time interval, wherein the third uplink, downlink transmission time interval of the third is greater than or equal to 20ms. 本发明的技术效果在于:1) ,中继器到基站、中继器到移动终端的同时发送、同时接收产生了两跳间复用频谱,提高了频谱利用率;2) ,中继器到基站、中继器到移动终端的同时发送、同时接收充分利用了固定式中继器的施主天线和重发天线具有的方向性,当若干基站同步地对本小区发射信号时,基站间互不干扰,基站对邻小区的中继器的干扰可以利用中继器的施主天线和重发天线的方向性有效地抑制;3) ,与PHS (Personal Handy-phone System,个人手持系统/小灵通)基站共站址的固定式中继器安装方法充分利用了运营商的现有资源,也解决了供电问题。 Technical effects of the present invention is that: 1), to the relay station, to the mobile terminal while the relay transmission while receiving generated between two jumps spectrum reuse, to improve the spectrum efficiency; 2), the relay the base station, while the repeater transmits to the mobile terminal while receiving the full advantage of the repeater donor antenna and the fixed antenna having directivity retransmission, when the number of base stations transmitting synchronization signals to the cell, interfere with each other between the base stations the base station repeater interference of neighboring cells can use the repeater donor antenna and retransmission antenna directivity effectively suppressed; 3), and PHS (personal Handy-phone system, personal Handyphone system / PHS) base station co-sited stationary relay mounting method makes full use of available resources carriers, but also solve the problem of power. 以下结合附图和具体实施例对本发明进行详细描述,但不作为对本发明的限定。 The present invention will be described in detail in conjunction with the accompanying drawings and the specific embodiments, but not limit the present invention. 附图说明图1为现有固定无线数字中继系统的结构示意图; BRIEF DESCRIPTION OF DRAWINGS FIG 1 is a schematic structure of a conventional fixed wireless digital relay system;

图2为本发明无线数字屮继系统的结构示意图; 图3为本发明选取传输时间间隔的流程示意图。 3 a schematic flow chart of the present invention to select a transmission time interval; Figure 2 a schematic view of a wireless digital system following Che present invention. 具体实施方式请参阅图2所示,为本发明无线数字中继系统的结构示意图。 DETAILED DESCRIPTION Referring to FIG. 2, a schematic view of the structure of a digital radio relay system of the present invention. 该无线数字中继系统包括: 一个或多个无线数字中继器101、 一个或多个基站102、 一个或者多个移动终端103。 The digital radio relay system comprising: one or more wireless digital trunk 101, one or more base stations 102, one or more mobile terminals 103. 其中,基站102既可以以传统的方式与移动终端103 建立通信联系,也可以通过无线数字中继器101与移动终端103建立通信联系。 Wherein either the base station 102 may establish communication links in a conventional manner with the mobile terminal 103, 103 may be established via a wireless communication link 101 and mobile digital trunk terminal. 此处,移动终端103包括两个移动终端,即移动终端103a、移动终端103b。 Here, the mobile terminal 103 comprises two mobile terminals, i.e., the mobile terminal 103a, the mobile terminal 103b. 无线数字中继器101、基站102之间和无线数字中继器101、移动终端103 之间采用灵活的传输时间间隔TTI来改进系统的传输效率。 Wireless digital trunk 101, digital radio between base station 102 and relay 101, a flexible transmission time interval (TTI) between the mobile terminal 103 to improve the transmission efficiency of the system. 无线数字中继器101、基站102之间和无线数字中继器101、移动终端103之间采用帧结构, 该帧结构的特征是包含支持无线数字中继器101在面向基站102的天线和面向移动终端103的天线上同时接收信号或者同时发射信号的时隙。 Wireless digital relays 101, 102 between the base station and the wireless digital relays 101, 103 adopts a frame structure between the mobile terminal, characterized in that the frame structure comprises a digital wireless repeater 101 in the base station 102 for the antenna and for receiving signals on the antenna of the mobile terminal 103 or transmit the same time slot signals. 无线数字中继系统采用灵活的传输时间间隔TTI来改进系统的传输效率。 Flexible digital radio relay system transmission time interval TTI to improve the transmission efficiency of the system. 结合图1,进一步描述TD-SCDMA (Time Division-Synchronous Code Division Multiple Access,时分同步码分多址接入)系统与PHS系统协同工作的系统和方法,将本发明无线中继系统置于图l所示的系统中,此时基站102 是TD-SCDMA系统的基站,基站102的覆盖区域内存在若干个PHS基站, TD-SCDMA系统的基站和PHS基站可以属于同一个运营商,也可以不属于同一个运营商。 In conjunction with FIG. 1, further described TD-SCDMA (Time Division-Synchronous Code Division Multiple Access, Time Division Synchronous Code Division Multiple Access) system and the PHS system and method for the system to work, the radio relay system of the present invention is placed in Figure l the system shown in this case base station 102 is a base station of the TD-SCDMA system, the coverage area of ​​a base station memory 102 in a plurality of PHS base stations, a base station TD-SCDMA system and the PHS base station may belong to the same operator, or may not belong to same operator. 为了节省组网成本和解决中继器的供电问题,基站102所覆盖的无线数字中继器101全部或者部分与基站102覆盖区域内的PHS基站共址设置,并且与PHS基站共址设置的无线数字中继器101和PHS基站共享供电线路或者共享电源。 In order to save costs and resolve network relay power supply problem, the wireless base station 102 covered by the digital relays 101 and all or part of the base station 102 covering the PHS base station co-located within the region is provided, and is provided with the PHS wireless base station collocated and digital repeater 101 or PHS base stations share a shared power supply line. 由于无线数字中继器101的布设高度和天线的方向性保障了无线数字中继器101与TD-SCDMA系统的基站102之间存在良好的无线信道,因此,在无线数字中继器101与TD-SCDMA系统的基站102之间采用大小为5ms的传输时间间隔TTI。 Since the height of the layout wireless digital repeaters 101 and an antenna directivity of the wireless digital protection relay 101 is present between the base station system 102 TD-SCDMA and the good radio channel, and therefore, in a digital radio repeater 101 and TD 102 between the base station system using -SCDMA size of 5ms transmission time interval TTI. 对于与TD-SCDMA系统的基站102直接建立通信链路903的移动终端103b,以及通过无线数字中继器101与TD-SCDMA系统的基站102建立通信 103b for the mobile terminal 903 establishes a communication link with the base station 102 directly to TD-SCDMA system and TD-SCDMA system with a base station to establish communication via a digital wireless repeaters 101,102

链路902的移动终端103a,由于移动终端103的移动,链路卯3和902的信道质量是时变的,为了以合适的方式向移动终端103a、 103b提供业务,网络实时地判断链路903和902的信道质量并根据判断结果自适应地调整链路903 和902使用的传输时间间隔TTI。 Link 902 of the mobile terminal 103a, due to the movement, the link quality channel d 3 and 902 of the mobile terminal 103 is time-varying, in a suitable manner to the mobile terminals 103a, 103b provide services, network link 903 is determined in real time and a channel quality 902 based on the result of the transmission time and adaptively adjust the link 903 and spacer 902 using TTI. 结合图2,进一步描述传输时间间隔TTI选取的基本原则,图2中的基站102至无线数字中继器101的链接901分为上行链路RB和下行链路BR;无线数字中继器101至移动终端103a的链接902分为上行链路MR和下行链路RM;基站102至移动终端103b的链接卯3分为上行链路MB和下行链路BM。 In conjunction with FIG. 2, the basic principles described in further transmission time interval TTI selected, the base station 102 in FIG. 2 to a digital radio relay link 901,101 is divided into a downlink and uplink RB BR; wireless digital repeater 101 to Links 103a of the mobile terminal 902 is divided into downlink and uplink MR RM; base station 102 to the mobile terminal 103b is divided into 3 link d MB uplink and downlink BM. 传输时间间隔TTI选取的基本原则具体是:基站102至无线数字中继器101的链接901使用固定的TTI,比如,TTI选为5ms;无线数字中继器101 至移动终端103a的链接902、基站102至移动终端103b的链接903根据链路和质量情况自适应选择TTI,例如,选择大于或者等于20ms的某个时间作为TTIo其中,无线数字中继器101至移动终端103a的链接902、基站102至移动终端103b的链接903根据链路和质量情况自适应选择TTI的原则具体是: 在链路的信道质量差时,分配给实时性强的业务短的TTI,比如,TTI选为5ms, 而在链路的信道质量好时,采用大于或者等于20ms的某个时间作为TTI。 The basic principles of transmission time interval TTI is selected specifically: the wireless base station 102 to relay a digital links 901,101 using a fixed TTI, for example, preferably 5ms TTI; digital radio relay link to the mobile terminal 103a 101 902, the base station 102 to the mobile terminal 103b adaptively selecting the link 903 and the link quality according to the TTI, for example, select a time greater than or equal to 20ms as TTIo wherein the link 101 to the mobile terminal 103a of digital wireless repeater 902, the base station 102 103b of the link to the mobile terminal 903 according to the adaptive selection principles TTI link quality situation and in particular: the difference in channel quality of the link, assigned to the short TTI and real time traffic, such as, preferably TTI 5ms, and when a link channel quality is good, the use of greater than or equal to a certain time 20ms TTI. 其中,信道质量优劣的判断方法是:1) ,判断信干比是否大于一个预设门限TH_SIR,若信干比大于预设门限TH—SIR时,判为信道质量好,若信干比小于预设门限TH一SIR时,判为信道质量差;TH—SIR为大于3分贝的数值,TH—SIR典型取值为10分贝;2) ,计算信道的衰落因子p,通过比较衰落因子p与预设门限TH—fade 判断信道质量优劣;若衰落因子p小于预设门限TH—fade时,判定信道为轻度衰落信道,若衰落因子p大于预设门限TH一fade时,判定信道为深度衰落信道。 Wherein the method of determining the channel quality of the merits is that: 1), is determined signal to interference ratio is greater than a predetermined threshold TH_SIR, if SIR is greater than a preset threshold TH-SIR, judged as the good channel quality, if the SIR is less than when preset threshold TH a the SIR, judged as poor channel quality; TH-SIR is a value of 3 dB greater than, TH-SIR typical value of 10 db; 2), for calculating the channel fading factor p, by comparing the fading factor p and preset threshold TH-fade determines the channel quality of the merits; while if the fading factor p smaller than a preset threshold TH-fade, determining channel mild fading channel, when the fading factor p is greater than a preset threshold TH a fade, determined channel depth fading channel. 其中,预设门限TH—fade的取值为大于零的小数,典型取值是0.2。 Wherein the preset threshold value TH-fade is greater than zero decimal value typically is 0.2. p=(i〜,其中cr是接收信号功率时延分布的标准差,p是接收信号功率时延分布的均值;对于N (大于1的自然数)个天线构成的天线阵列,(7是N个接收天线上接收信号功率的标准差,p是N个接收天线上接收信号功率的均值。3) ,判断发射机的移动速度,移动速度可以有多种判断方法,比如,采 p = (i~, where cr is the standard delay profile of the received signal power difference, p is the mean of the power delay profile of a received signal; for N (a natural number greater than 1) antenna array antennas constituted (by N 7 standard received signal power difference between the antennas on the receiver, p is the average received signal power .3 N receive antennas), the transmitter determines the moving speed, the moving speed can be determined a variety of methods, for example, mining

用接收信号的"零穿"频率进行判断;"零穿"频率是指信号幅度衰落过零点的频率;当"零穿"频率大于一个预定值TFizero时,就认为发射机处于高速移动状态,当"零穿"频率小于-一个预定值TH—zero时,就认为发射机处于低速移动状态;TH—zero的典型取值是10。 With "zero wear" determines the frequency of the received signal; "zero wear" refers to the frequency of the signal amplitude fading through zero frequency; when the "zero wear" frequency is greater than a predetermined value TFizero, the transmitter is considered high speed moving state, when "zero wear" frequency is less than - a predetermined value TH-zero, the transmitter considers the slowly moving; TH-zero value typically is 10. 当信千比大于预设门限TH一SIR、 p二d/V小于预设门限TH—fade,并且"零穿"频率小于预定值TH一zero时,就认为信道质量好。 When the cell ratio is greater than one thousand a preset threshold TH SIR, p two d / V is less than the preset threshold TH-fade, and "zero wear" frequency is less than a predetermined value TH zero, considered a good channel quality. 当信干比小于预设门限TH一SIR、 p二c5/p大于预设门限TH一fade,并且"零穿"频率大于预定值TH一zero时,就认为信道质量差。 When the SIR is less than a preset threshold TH SIR, p two c5 / p is greater than a preset threshold TH fade, and "zero wear" when the frequency is greater than a predetermined value TH zero, considered poor channel quality. 请参阅图3所示,为本发明选取传输时间间隔的流程示意图。 Please refer to FIG. 3, a schematic flowchart of a transmission time interval of the present invention is selected. 结合图l、 2,该流程示意图描述了一种灵活使用TTI的方式示意图。 In conjunction with FIG. L, 2, a schematic flow chart which describes the use of a flexible TTI schematic manner. 本发明选取传输时间间隔TTI的基本步骤如下:步骤卯4,网络通过基站102接收移动终端103b的业务请求;根据移动终端103b的业务请求,网络就可以获知移动终端103b所需要的业务质量和无线资源;步骤905,网络通过基站102接收移动终端103b对信道的测量数据,这些测量数据包括移动终端103b测量得到的基站导频功率和无线数字中继器101发射的中继器标识信号的功率,网络根据移动终端103b上报的基站导频功率和无线数字中继器101发射的中继器标识信号的功率,通过步骤906实现移动终端接入方式判断;步骤906,移动终端接入方式判断方法是:如果移动终端103b接收到的基站导频功率大于无线数字中继器101发射的中继器标识信号的功率,就直接使用基站102至移动终端103b的链接903建立链接关系,此时进入步骤卯7; 如果移动终端103b接收到的基站导频功率小于无线数 The basic steps of the present invention to select a transmission time interval TTI is as follows: Step d 4, the network receives a mobile terminal service request 103b through the base station 102; according to the service request of the mobile terminal 103b, the network can acquire the mobile terminal 103b required quality of service and the radio resources; step 905, the network receives the measurement data of the mobile terminal 103b to the base station through the channel 102, these measurements include signal power of the relay station identifies the mobile terminal 103b guide the pilot power measured by repeaters 101 and wireless digital transmission, the power network repeater station identification signal 103b guide the mobile terminal and reported by the radio frequency power emitted by the digital relays 101, 906 through a mobile terminal access determining step; step 906, the mobile terminal access method determination : repeater identification signal power is greater than the power of a digital radio relay station 101 transmits the pilot if the mobile terminal 103b to the received frequency, directly linked using the base station 102 to the mobile terminal 903 to establish a link 103b of the relationship, then proceeds to step d 7; if the base station 103b guide the mobile terminal receives radio frequency power is less than the number of 字中继器101发射的中继器标识信号的功率,就通过基站102至无线数字中继器101的链接901、无线数字中继器101至移动终端103a的链接902建立链接关系,此时进入步骤908;步骤907,进行移动终端103b至基站102的信道质量判断,判断方法是: al),判断信干比是否大于一个预设门限TH一S1R,若信干比大于预设门限TH—SIR时,判为信道质量好,若信干比小于预设门限TH一SIR时,判为信道质量差;TH一SIR为大于3分贝的数值,TH一SIR典型取值为IO分贝。 Power repeater identification signal transmitted word repeater 101, to 901, the link 101 to the mobile terminal 103a of the relay 902 to establish the digital radio link relationship by linking the base station 102 to the wireless digital trunk 101, this time into step 908; step 907, the mobile terminal 103b to the base station a channel quality 102 of the judgment, judging method is: al), is determined signal to interference ratio is greater than a predetermined threshold TH a S1R, if SIR is greater than a preset threshold TH-SIR when the channel quality is good is judged, when the signal to interference ratio is less than a preset threshold TH SIR when judged as poor channel quality; TH is a SIR value is greater than 3 dB, typically an SIR value of TH IO dB.

a2),计算信道的衰落因子p,通过比较衰落因子p与预设门限TH一fade 判断信道质量优劣;若衰落因子p小于预设门限TH一fade时,判定信道为轻度衰落信道,若衰落因子p大于预设门限TH—fade时,判定信道为深度衰落信道。 A2), for calculating the channel fading factor p, threshold TH a fade determines the channel quality of the merits by comparing the fading factor p with a preset threshold; if fading factor p smaller than a preset threshold TH a fade, determining channel fading channel mild, if fading factor p is greater than a preset threshold TH-fade, determining channel fading channel depth. 其中,预设门限TH—fade的取值为大于零的小数,典型取值是0.2。 Wherein the preset threshold value TH-fade is greater than zero decimal value typically is 0.2. p=a/p,其中o是接收信号功率时延分布的标准差,p是接收信号功率时延分布的均值;对于N (大于1的自然数)个天线构成的天线阵列,(j是N个接收天线上接收信号功率的标准差,p是N个接收天线上接收信号功率的均值。a3),判断发射机的移动速度,移动速度可以有多种判断方法,比如,采用接收信号的"零穿"频率进行判断;"零穿"频率是指信号幅度衰落过零点的频率;当"零穿"频率大于一个预定值TH—zero时,就认为发射机处于高速移动状态,当"零穿"频率小于一个预定值TH一zero时,就认为发射机处于低速移动状态;TH—zero的典型取值是10。 p = a / p, where o is the standard delay profile of the received signal power difference, p is the mean of the power delay profile of a received signal; for N (a natural number greater than 1) antenna array antennas constituted, (j by N standard received signal power difference between the receiving antenna, p is the average received signal power N receive antennas .a3), the transmitter determines the moving speed, the moving speed can be determined a variety of methods, such as, the received signal using the "zero wear "frequency determination;" zero wear "refers to the frequency of the fading signal amplitude over frequency of zero; when the" zero wear "when the frequency is greater than a predetermined value TH-zero, the transmitter is considered a high-speed moving state, when the" zero wear " when the frequency is less than a predetermined value TH a zero, the transmitter is considered a low-speed movement state; TH-zero value typically is 10. 当信干比大于预设门限TH—SIR、 p二cj/p小于预设门限TH一fede,并且"零穿"频率小于预定值TH一zero时,就认为信道质量好;步骤908,进行移动终端103a至无线数字中继器101的信道质量判断, 判断方法是:bl),判断信干比是否大于一个预设门限TH一SIR,若信干比大于预设门限TH—SIR时,判为信道质量好,若信干比小于预设门限TH一SIR时,判为信道质量差;TH一SIR为大于3分贝的数值,TH一SIR典型取值为10分贝。 When the SIR is greater than a preset threshold TH-SIR, p two cj / p is less than the preset threshold TH a minor subunit FedE of, and "zero wear" frequency is less than the predetermined value TH a ZERO, considered a good channel quality; step 908, mobile terminal 103a to the wireless digital repeater 101 a channel quality determination, determination is: bl), determined signal to interference ratio is greater than a predetermined threshold TH a the SIR, if the SIR is greater than a preset threshold TH-SIR, ruled channel quality is good, if the signal to interference ratio is less than a preset threshold TH SIR when judged as poor channel quality; a SIR value TH is larger than 3 db, TH is typically a SIR value of 10 dB. b2),计算信道的衰落因子p,通过比较衰落因子p与预设门限TH—fade 判断信道质量优劣;若衰落因子p小于预设门限TH—fade时,判定信道为轻度衰落信道,若衰落因子p大于预设门限TH—fade时,判定信道为深度衰落信道。 B2), for calculating the channel fading factor p, by comparing the fading factor p with a preset threshold TH-fade determines the channel quality of the merits; if fading factor p smaller than a preset threshold TH-fade, determining channel mild fading channel, if fading factor p is greater than a preset threshold TH-fade, determining channel fading channel depth. 其中,预设门限TH一fade的取值为大于零的小数,典型取值是0.2。 Wherein the preset threshold value TH a fade is greater than zero decimal value typically is 0.2. p=04i,其中a是接收信号功率时延分布的标准差,p是接收信号功率时延分布的均值;对于N(大于1的自然数)个天线构成的天线阵列,c5是N个接收天线上接收信号功率的标准差,p是N个接收天线上接收信号功率的均值。 p = 04i, wherein the standard is a power delay profile of a received signal difference, p is the mean of the power delay profile of a received signal; for N (a natural number greater than 1) antenna array composed of antennas, c5 is the N receive antennas standard received signal power difference, p is the average received signal power N receive antennas. b3),判断发射机的移动速度,移动速度可以有多种判断方法,比如,采用接收信号的"零穿"频率进行判断;"零穿"频率是指信号幅度衰落过零点 B3), the transmitter determines the moving speed, the moving speed can be determined a variety of methods, such as, the received signal using the "zero wear" frequency determination; "zero wear" refers to the frequency of the zero crossing signal amplitude fading

的频率;当"零穿"频率大于一个预定值TH—zero时,就认为发射机处于高速移动状态,当"零穿"频率小于-个预定值TH一zero时,就认为发射机处H氐速移动状态;TH一zero的典型取值是10。 Frequency; when the "zero wear" frequency is greater than a predetermined value TH-zero, it is considered a transmitter in a high speed moving state, when the "zero wear" frequency is less than - a zero predetermined value TH, the considered transmitter Di H speed mobility state; typical value TH 10 is a zero. 当信干比小于预设门限TH—SIR、 p二cj/p大于预设门限TH一fade,并且"零穿"频率大于预定值TH一zero时,就认为信道质量差;步骤909,选取传输时间间隔TTI。 When the SIR is less than the preset threshold TH-SIR, p two cj / p is greater than a preset threshold TH a Fade, and "zero wear" a frequency greater than the predetermined value TH a ZERO, considered poor channel quality; step 909, selecting transmission time interval TTI. 只有在链路的信道质量差时,分配给实时性强的业务短的TTI,如TTI选为5ms,在信道质量好时,采用大于或者等于20ms的某个时间作为TTI。 Only when the difference between the channel quality of the link, assigned to the short TTI and real time services, such as TTI preferably 5ms, when the channel quality is good, the use of greater than or equal to a certain time 20ms TTI. 上述选取传输时间间隔TTI的方法步骤既可用于上行业务中TTI的确定, 也可用于下行业务TTI的确定。 Select a transmission time interval TTI above method steps can be used to determine the upstream traffic in the TTI, the downlink traffic may also be used to determine the TTI. 本发明系统和方法可以显著提高时分双工移动通信系统,如TD-SCDMA 系统的传输速率和频谱效率,显著降低无线数字中继器引入的时延,显著降低移动终端发射信号对邻小区基站的干扰,且可实现性强。 The system and method of the present invention can significantly improve the time division duplex mobile communication system, such as transmission rate and spectral efficiency TD-SCDMA system, significantly reducing the latency wireless digital repeater introduced significantly reduces the mobile terminal transmits a signal to the neighbor cell base station interference and may achieve strong. 本发明通过支持灵活的传输时间间隔,在不同信道环境下使用最优的传输时间间隔,使得传输效率和时延得到优化,并且移动终端通过时间分集实现节省发射功率。 The present invention is supported by the flexible transmission time interval, using the optimum transmission time interval in different channel environments, so that the transmission efficiency and the delay is optimized, and the mobile terminal to achieve time diversity transmit power savings. 当然,本发明还可有其他多种实施例,在不背离本发明精神及其实质的情况下,熟悉本领域的技术人员当可根据本发明作出各种相应的改变和变形,但这些相应的改变和变形都应属于本发明所附的权利要求的保护范围。 Of course, the present invention may have many other embodiments without departing from the spirit and essence of the present invention, those skilled in the art can make various corresponding modifications and variations according to the present invention, these corresponding modifications and variations shall fall within the scope of the appended claims.

Claims (10)

  1. 1、一种无线数字中继系统,适用于时分双工无线通信系统,该中继系统包括至少一个无线数字中继器、至少一个基站、至少一个移动终端,其特征在于, 所述基站与所述无线数字中继器之间的链接分为第一上行链路、第一下行链路;所述无线数字中继器与所述移动终端之间的链接分为第二上行链路、第二下行链路;所述基站与所述移动终端之间的链接分为第三上行链路、第三下行链路; 所述第一上行链路、所述第一下行链路采用固定的传输时间间隔;所述第二上行链路、所述第二下行链路、所述第三上行链路、所述第三下行链路根据对应链路的信道质量情况自适应选择传输时间间隔。 A digital radio relay system for a time division duplex wireless communication system, the wireless relay system comprises at least one digital repeater, the at least one base station, the at least one mobile terminal, wherein the base station and the said digital wireless link between the relay into a first uplink, the first downlink; digital radio link between the relay and the uplink mobile terminal into a second, first two downlink; link between the base station and the mobile terminal into a third uplink, third downlink; the first uplink, the first downlink of the fixed transmission time interval; the second uplink, downlink and the second, the third uplink, adaptive selection of the third downlink transmission time interval according to the channel quality condition corresponding to the link.
  2. 2、 根据权利要求1所述的无线数字中继系统,其特征在于,所述无线数字中继器、所述基站之间和所述无线数字中继器、所述移动终端之间采用帧结构进行数据传输,该帧结构包含支持所述无线数字中继器在面向所述基站的天线和面向所述移动终端的天线上同时接收信号或者同时发射信号的时隙。 2, a digital radio relay system according to claim 1, wherein the wireless digital relay, between the frame structure and the use of wireless digital repeater, the mobile terminal between the base station data transmission, the radio frame structure comprises said support of said mobile digital repeater receiving signals on the slot antennas of the terminal or simultaneously transmit signals at the antenna of the base station and facing faces.
  3. 3、 根据权利要求1或2所述的无线数字中继系统,其特征在于,所述时分双工无线通信系统为时分同步码分多址接入系统。 3, a digital radio relay system according to claim 1 or claim 2, wherein said wireless communication system is a time division duplex Time Division Synchronous Code Division Multiple Access system.
  4. 4、 根据权利要求3所述的无线数字中继系统,其特征在于,在所述基站的覆盖区域内设置至少一个PHS基站,部分或者全部所述无线数字中继器与所述PHS基站共址设置,且与所述PHS基站共址设置的无线数字中继器与所述PHS基站共享供电线路或共享电源。 4, a digital radio relay system as claimed in claim 3, characterized in that at least a PHS base stations within the coverage area of ​​the base station, some or all of the digital radio relay station co-located with the PHS set and the PHS base station co-located with the set of wireless digital repeaters share a power line and the PHS base station or shared power.
  5. 5、 一种基于权利要求1所述系统的传输时间间隔的选取方法,其特征在于,包括:步骤一,设置所述基站与所述无线数字中继器之间通过第一上行链路、第一下行链路建立链接;设置所述无线数字中继器与所述移动终端之间通过第二上行链路、第二下行链路建立链接;设置所述基站与所述移动终端之间通过第三上行链路、第三下行链路建立链接;步骤二,所述第一上行链路、所述第一下行链路以固定传输时间间隔进行数据传输;同时,对所述移动终端至所述无线数字中继器的信道质量进行判断, 自适应选择所述第二上行链路、所述第二下行链路的传输时间间隔;对所述移动终端至所述基站的信道质量进行判断,自适应选择所述第三上行链路、所述第三下行链路的传输时间间隔。 5, based on the claim 1 system transmission time interval selection method, which is characterized in that, comprising: a first uplink between a step, provided the base station and the wireless digital repeater, the first downlink link is established; the second uplink, downlink establishes the link between the second set of the digital wireless relay and the mobile terminal; provided by between the base station and the mobile terminal third uplink, third downlink link is established; step two, the first uplink, the first downlink transmission in a fixed time interval for data transmission; the same time, to the mobile terminal the channel quality wireless digital relay to judge, adaptively selecting the second uplink, downlink transmission time of the second interval; the mobile terminal to the base station of the channel quality determination is performed adaptively selecting a third uplink transmission time interval of the third downlink.
  6. 6、 根据权利要求5所述的传输时间间隔的选取方法,其特征在于,所述步骤一、所述步骤二之间,还包括:步骤61,通过所述基站接收所述移动终端的业务请求,并根据该业务请求获得所述移动终端所需要的业务质量和无线资源;歩骤62,通过所述基站接收所述移动终端对信道的测量数据;步骤63,根据所述测量数据建立所述基站与所述移动终端之间的链接关系或通过所述无线数字中继器建立所述基站与所述移动终端之间的链接关系。 6, according to a transmission time interval of 5 of the selection method as claimed in claim wherein, between said step a, step two, further comprising: a step 61, the mobile terminal receiving a service request through the base station and obtaining the service request based on the mobile terminal required quality of service and the radio resource; ho step 62, the mobile terminal receives the measurement data of the channel by the base station; step 63, based on the measured data establishing the link relation between the base station and the mobile terminal or a link to establish a relationship between the base station and the mobile terminal through the wireless digital repeater.
  7. 7、 根据权利要求5或6所述的传输时间间隔的选取方法,其特征在于, 所述对所述移动终端至所述无线数字中继器的信道质量进行判断的步骤中,当信干比小于一第一预设门限、信道的衰落因子大于一第二预设门限,且所述系统接收信号的幅度衰落过零点的频率大于一预定值时,则信道质量差。 7, according to a transmission time of 5 or 6 selected interval The method of claim, wherein the step of the mobile terminal to the wireless digital repeater channel quality determination, when the signal to interference ratio less than a first predetermined threshold, channel fading factor is larger than a second predetermined threshold and the amplitude of the fading signal received through the system frequency is greater than a predetermined zero value, the channel quality is poor.
  8. 8、 根据权利要求7所述的传输时间间隔的选取方法,其特征在于,所述第二上行链路、所述第二下行链路的传输时间间隔为5ms。 8, according to a transmission time interval of the selection method of claim 7, characterized in that said second uplink, downlink transmission time of the second interval of 5ms.
  9. 9、 根据权利要求5或6所述的传输时间间隔的选取方法,其特征在于, 所述对所述移动终端至所述基站的信道质量进行判断的步骤中,当信干比大于一第一预设门限、信道的衰落因子小于一第二预设门限,且所述系统接收信号的幅度衰落过零点的频率小于一预定值时,则信道质量好。 9, according to a transmission time of 5 or 6 selected interval The method of claim, wherein the mobile terminal to the channel quality of the base station determining step, when the SIR is greater than a first preset threshold, the channel fading factor is less than a second predetermined threshold, and the amplitude of the fading signal received through the system is less than a predetermined value, the channel quality is good frequency zero.
  10. 10、 根据权利要求9所述的传输时间间隔的选取方法,其特征在于,所述第三上行链路、所述第三下行链路的传输时间间隔大于或等于20ms。 10, according to a transmission time interval of the selection method of claim 9, characterized in that said third uplink, downlink transmission time interval of the third is greater than or equal to 20ms.
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