CN1330192C - Method for high-frequency amplifying station to gain switching point in TD-SCDMA system - Google Patents

Method for high-frequency amplifying station to gain switching point in TD-SCDMA system Download PDF

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CN1330192C
CN1330192C CNB031499589A CN03149958A CN1330192C CN 1330192 C CN1330192 C CN 1330192C CN B031499589 A CNB031499589 A CN B031499589A CN 03149958 A CN03149958 A CN 03149958A CN 1330192 C CN1330192 C CN 1330192C
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repeater
td
point
conversion
method
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CN1582001A (en
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余嘉联
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华为技术有限公司
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Abstract

本发明公开了一种TD-SCDMA系统中直放站获取转换点的方法,用于增强和转发同一子帧第一个与第二个转换点之间的上行信号,以及增强和转发该子帧第二个转换点与下一子帧中第一个转换点之间的下行信号。 The present invention discloses a method of TD-SCDMA system to obtain the conversion repeater points, and forwarding the same to enhance the uplink subframe signals between the first and second switching points, and the sub-frame forwarding and enhance a second downlink signal between the switching points with the first transition point of the next sub-frame. 该方法包括如下步骤:a.将第二个转换点位置信息放置在广播信道中传输;b.直放站获取子帧第一个转换点的时间;c.解调子帧中0时隙的最初两个码道;d.从步骤c解调的结果中提取第二个转换点位置信息,得到第二转换点的时间。 The method comprising the steps of: a second changeover position information is placed in the transmission of the broadcast channel; B repeater obtaining a conversion sub-frame time point; C demodulating subframe slots 0... the first two code channels;. D results from step c demodulated to extract the second switching point position information, time of the second switching point. 其中,利用广播信道传输第二个转换点位置信息是动态更新的,直放站在增强和转发上、下行信号的同时重复步骤c与d。 Wherein the broadcast channel transmission using the second conversion point position information is updated dynamically, and the forward repeater enhanced, while the downlink signal repeating steps c and d. 本发明克服了现有直放站不能在TD-SCDMA系统配置的上下行时隙分配方式处于不断变化的情况下工作的缺点。 The present invention overcomes the disadvantages of the prior repeater does not work in the case of changing the uplink and downlink timeslot allocation in TD-SCDMA system configuration.

Description

TD-SCDMA系统中直放站获取转换点的方法 TD-SCDMA system repeater acquired transition point method

技术领域 FIELD

本发明涉及TD-SCDMA系统,具体地说,涉及TD-SCDMA系统中直放站获取转换点的方法。 The present invention relates to a TD-SCDMA system, and more particularly, to a TD-SCDMA system, a method to obtain the conversion repeater points.

背景技术 Background technique

时分同步码分多址(TD-SCDMA)是被国际电信联盟(ITU)与3GPP认可的第三代移动通信(3G)的三个主要标准之一。 Time Division Synchronous Code Division Multiple Access (TD-SCDMA) is one of three main criteria to be recognized International Telecommunication Union (ITU) and 3GPP third generation mobile communication (3G) of. TD-SCDMA在ITU标准中被称为低码片速率(1.28MCps,1.28兆码片/秒)时分复用技术方案。 TD-SCDMA is referred to as Low Chip Rate (1.28MCps, 1.28 Mchip / sec) in the time division multiplexing aspect of the ITU standard.

如图1所示,在时间上,TD-SCDMA信号被分成周期性的时间单元。 As shown in FIG. 1, in time, TD-SCDMA signal is divided into periodic time units. 一个基本的时间单元称为“无线帧”,每个无线帧的长度是10ms。 A basic time unit is called "radio frame", the length of each radio frame is 10ms. 每一个无线帧分为两个长度相等的“子帧”,每个子帧的长度是5ms。 Each radio frame is divided into two equal-length "subframe" length of each subframe is 5ms. 每一个子帧分为几个不同的部分,其中有7个时间长度相同的时隙(TS),每个时隙的长度为0.675ms,以及位置在时隙TS0和时隙TS1之间的下行导频时隙(DwPTS)、上行导频时隙(UpPTS)和一段保护间隔(GP),它们的时间长度分别为75μs、125μs与75μs。 Each subframe is divided into several different parts, of which there are seven time slots the same length (the TS), the length of each slot is 0.675 ms, and the position between time slots TS0 and the downlink slot TS1 of pilot time slot (DwPTS), uplink pilot time slot (UpPTS), and guard interval period (GP), the length of time they were 75μs, 125μs and 75μs.

根据信号方向的不同,每一个时隙分为上行方向和下行方向两种类型。 Depending on the direction of signals, each time slot is divided into upstream direction and a downstream direction of two types. 上行方向是指,在该时隙里传输的无线信号由用户终端设备(UE)发射,基站(Node-B)接收;下行方向是指,在该时隙里传输的无线信号由Node-B发射,UE接收。 Refers to the upstream direction, the time slot in the transmission signal transmitted by a wireless user terminal device (the UE), the base station (Node-B) receiver; refers to the downstream direction, the transmission time slot in the radio signal transmitted by Node-B , UE reception.

在TD-SCDMA标准中,TS0总是被指定为下行方向,TS1总是被指定为上行方向。 In the TD-SCDMA standard, TS0 is always specified as the downstream direction, TS1 is always specified as the upstream direction. TS2,TS3,...,TS6将根据业务的需要,被动态地指定为上行方向或下行方向。 TS2, TS3, ..., TS6 will be based on business needs, it is dynamically assigned to uplink or downlink direction. 另外,DwPTS是下行方向,UpPTS是上行方向。 Further, DwPTS is a downlink direction, UpPTS uplink direction. 上行方向的时隙和下行方向的时隙之间,由一个转换点分开。 Between the slot and the downlink slot in the upstream direction, separated by a transition point. 在每个子帧中,有两个转换点:第一个转换点是从下行方向转到上行方向,位置在DwPTS和UpPTS之间的GP;第二个转换点是从上行方向转到下行方向,位置在每个子帧中最后一个上行时隙和第二个下行时隙(TS0是第一个下行时隙)之间。 In each subframe, there are two transition points: the first point is a conversion from the downlink direction to the uplink direction, between the position GP and the UpPTS DwPTS; second conversion point is upstream direction to the downstream direction, position in each subframe of the last slot and a second uplink between the downlink time slot (TS0, the first downlink slot). 其中,第一个转换点相对于每个子帧的开始时间是固定的;第二个转换点随着TS2,...,TS6被指定为不同数量的上行时隙和下行时隙,其相对于每个子帧的开始时间,将会有所变化。 Wherein, the first transition point with respect to the start time of each sub-frame is fixed; the second transition point as TS2, ..., TS6 is designated as a different number of uplink time slots and downlink time slots with respect to the start time of each sub-frame will change.

图2列举了几种转换点位置不同的情况。 Figure 2 lists several different dot position conversion conditions. 如图2所示,a)中第二转换点位于上行方向时隙TS1与下行方向时隙TS2之间;b)第二转换点位于上行方向时隙TS2与下行方向时隙TS3之间;c)第二转换点位于上行方向时隙TS3与下行方向时隙TS4之间。 2, a) the second switching point is located between TS1 and TS2 uplink timeslot downlink slot; b) a second transition point positioned between the uplink slots and downlink time slots TS2 TS3; c ) located at the second transition point and the uplink time slot TS3 between the downlink slot TS4.

在TD-SCDMA网络中,需要一定数量的直放站和基站进行组合使用。 In the TD-SCDMA network, a certain number of the base station and a repeater used in combination. 直放站对基站和手机发出的信号进行增强和转发,从而对通信网络的覆盖范围进行拓展或补充。 Repeater phone and the signal emitted by the base station and forwarded enhanced, so that the coverage of the communication network to expand or supplement. 在目前直放站的应用中,无线直放站以其价格便宜、选址方便、传输简单的优点得到了大量的应用。 In the application of the current repeater, a wireless repeater with its cheap, convenient location, easy transport to get the advantage of a large number of applications.

现有的无线直放站的工作原理为,在下行方向上,直放站的施主天线接收来自基站的下行信号,通过自己的射频系统放大和处理后,再通过直放站的重发天线转发至手机;同时在上行方向上,直放站的重发天线接收来自手机的上行信号,同样处理以后,再通过直放站的施主天线转发至基站。 Existing wireless repeater works is, in the downstream direction, the repeater donor antenna receives a downlink signal from a base station through a radio frequency system after its amplification and treatment, and then forwarded by the repeater antenna to retransmit phone; while in the upstream direction, the repeater coverage antenna receive uplink signals from the handset, after the same treatment, and then forwarded to the base station through the repeater donor antenna. 现有的直放站可以运行在GSM、IS95、CDMA2000、W-CDMA等移动通信系统中。 Existing repeater can operate in GSM, IS95, CDMA2000, W-CDMA mobile communication system and the like. 在这些系统中,上行无线信号和下行无线信号处于不同的频率。 In these systems, the uplink radio signal and the downlink radio signal at a different frequency. 因此,现有的直放站一般包括了两套处理系统,分别对上行信号和下行信号进行接收、放大和发射等处理。 Thus, the conventional repeater generally includes two sets of a processing system, each uplink signal and a downlink signal reception processing such as amplification and emission. 这两套处理系统工作在不同的频率上。 This two processing systems operate on different frequencies.

但是,在TD-SCDMA系统中,上行信号和下行信号处于同一频率,通过时间复用的方式区分上行和下行。 However, the TD-SCDMA system, uplink signal and downlink signal at the same frequency by means of time multiplexing uplink and downlink distinction. 如果在TD-SCDMA系统中使用现有的直放站,直放站的上行和下行处理系统将工作在相同的频率上,上下行信号将会产生正反馈,导致信号恶化,直放站将无法使用。 If a repeater in conventional TD-SCDMA systems, uplink and downlink repeater processing system operating on the same frequency, uplink and downlink signals will have positive feedback, resulting in signal degradation, repeater will not use.

从前面的描述可以知道,Node-B将会在两个转换点之间,不断地调整其发射机和接收机的状态。 Can be known from the foregoing description, Node-B will convert between the two points, which constantly adjust the state of the transmitter and receiver. 在每一个子帧里,在第一个转换点之前,Node-B处于发射状态;在第一个和第二个转换点之间,Node-B处于接收状态;在第二个转换点之后,Node-B处于发射状态。 In each subframe, the conversion before the first point, Node-B in the transmit state; between the first and second switching points, Node-B in a receive state; after the second switching point, Node-B in the transmit state.

因此,解决该问题的思路是,在每个子帧里,直放站在第一个和第二个转换点之间只增强和转发上行信号,在第二个转换点和下一个子帧的第一个转换点之间只增强和转发下行信号,从而避免上下行处理系统同时工作。 Thus, the idea is to solve this problem, in each subframe, the repeater and forwarding only enhanced uplink signal between the first and second switching points, the first and second switching points of the next subframe and forwarding only the enhanced downlink signals between a switching point, so as to avoid the uplink and downlink processing system simultaneously.

现有技术是这样实现的:直放站通过一个或多个匹配滤波器与接收到的DwPTS中的信号进行匹配,得知DwPTS到达直放站的时间,由于每子帧的第一个转换点是在DwPTS和UpPTS之间的GP时间段里,从而直放站可以计算出第一个转换点的时间。 The prior art is achieved: by matching a repeater or a plurality of matched filters and signals in the received DwPTS, DwPTS time that reaches the repeater, since the first transition point of each sub-frame GP is the time period between the DwPTS and UpPTS, the repeater can be calculated so that the first transition time point. 但是,通过类似的方法无法获取第二个转换点的时间。 However, you can not get the time of the second transition point by a similar method. 直放站可以简单地默认第二个转换点是在TS3和TS4之间(或者其它时隙),如果移动网络系统配置的上下行时隙分配是固定为TS1~TS3为上行、TS4~TS6为下行,就可以使用这样的直放站。 Repeater may simply default second transition point is between TS3 and TS4 (or other time slot), if the mobile uplink and downlink timeslot assignment is fixed network system is configured as an uplink TS1 ~ TS3, TS4 ~ TS6 is downlink, you can use such a repeater.

如果移动网络系统配置的上下行时隙分配是其它方式,或者移动网络系统配置的上下行时隙分配方式处于不断的变化之中,则直放站由于不能获取第二转换点的位置将无法使用。 If the mobile network the uplink and downlink time slot allocation system configuration is otherwise, or uplink and downlink timeslot allocation in a mobile network system configuration constantly changing, the repeater can not be obtained due to the position of the second switching point can not be used .

发明内容 SUMMARY

本发明的目的是提供一种TD-SCDMA系统中直放站获取第二转换点的方法。 Object of the present invention is to provide a method of the TD-SCDMA system to obtain a second conversion point repeater.

广播信道(BCH)是一个下行传输信道,用于广播系统和小区的特有信息。 A broadcast channel (BCH) is a downlink transport channel for broadcasting system and the unique cell information. BCH在物理层映射到两个基本公共控制物理信道(P-CCPCH1和P-CCPCH2)上。 BCH is mapped to the physical layer on two substantially common control physical channel (P-CCPCH1 and P-CCPCH2). 在TD-SCDMA系统中,P-CCPCH1和P-CCPCH2的时隙为固定的TS0,映射到TS0的扩频因子为16的最初两个码道(0码道与1码道)。 In the TD-SCDMA system, P-CCPCH1 and P-CCPCH2 a fixed time slot TS0, TS0 mapped to the spreading factor of the first two code channels 16 (0 code channel with one track).

本发明提出的方法是在BCH信道中,利用至少3个比特,表示本小区的第二个转换点的信息。 The method proposed by the present invention is in the BCH channel, by using at least three bits, the second information indicating the switching points of the present cell. 例如,用数字n表示第二个转换点在每子帧的第n个时隙和第n+1个时隙之间。 For example, the number n represents a second transition point between the first and n-th slot n + 1 time slots per subframe. n的取值范围是1,2,...,5,数值n被加到BCH信道携带的信息中。 n is the range 1,2, ..., 5, the value of n is added to the BCH channel carrying information.

由于每子帧的第一个转换点是在DwPTS和UpPTS之间的GP时间段里,直放站可以计算出第一个转换点的时间。 Since the first transition point of each sub-frame in the time period between the DwPTS GP and UpPTS, the repeater can calculate the time of the first transition point. 由此,直放站就可以得知每子帧的两个转换点的位置。 Thus, the repeater can know the position of the two switching points of each sub-frame.

因此,本发明提供了一种TD-SCDMA系统中直放站获取转换点的方法,用于增强和转发每一子帧第一个与第二个转换点之间的上行信号,以及增强和转发该子帧第二个转换点与下一子帧中第一个转换点之间的下行信号,该方法包括如下步骤:a.将第二个转换点位置信息放置在广播信道中传输;b.直放站获取子帧第一个转换点的时间;c.解调子帧中0时隙的最初两个码道;d.从步骤c解调的结果中提取第二个转换点位置信息,得到第二转换点的时间。 Accordingly, the present invention provides a method of TD-SCDMA system the repeater to obtain the conversion point for an uplink signal between the first and the second enhancement conversion point and forwarding each sub-frame, and forwarding and enhanced the downlink sub-frame signal conversion between the first point and the second transition point of the next sub-frame, the method comprising the steps of:. a second changeover position information is placed in the transmission of the broadcast channel; b. Repeater acquisition sub-frame conversion time point a; c subframe demodulating the first two code channels for timeslot 0;. D converter extracts a second point position information from the demodulated result of the step c. to obtain a second time point conversion.

其中,利用广播信道的空闲部分表示第二个转换点位置信息是由Node-B或RNC完成的。 Wherein, using the broadcast channel indicates that the second portion of the free point position information is converted by the Node-B or RNC completed.

其中,利用广播信道表示第二个转换点位置信息是动态更新的;直放站在不断地作增强和转发上行或下行信号的同时,通过重复执行步骤c和d,获得第二个转换点位置的变化情况。 Wherein the broadcast channel using a second transform represented by point position information is dynamically updated; repeater for constantly while enhancing and forwarding uplink or downlink signal, by repeatedly performing steps c and d, to obtain a second position of the switching points It changes in circumstances.

本发明克服了现有直放站不能在TD-SCDMA系统配置的上下行时隙分配方式处于不断变化的情况下工作的缺点。 The present invention overcomes the disadvantages of the prior repeater does not work in the case of changing the uplink and downlink timeslot allocation in TD-SCDMA system configuration.

附图说明 BRIEF DESCRIPTION

图1是TD-SCDMA帧结构;图2是转换点位置的示意图;图3是DwPTS时隙的突发格式; FIG 1 is a TD-SCDMA frame structure; FIG. 2 is a schematic diagram of the conversion point position; FIG. 3 is a DwPTS timeslot burst format;

图4是P-CCPCH物理信道无线突发格式;图5是本发明直放站获取转换点信息的流程图。 FIG 4 is a P-CCPCH physical channel radio burst format; FIG. 5 is a flowchart of the present invention is the conversion point information acquisition repeater.

具体实施方式 detailed description

为使本发明的目的、技术方案及优点更加清楚明白,以下参照附图对本发明进一步详细说明。 For purposes of the present invention, technical solutions and advantages clearer, the accompanying drawings of the present invention is described in further detail below with reference.

图3是DwPTS时隙的突发格式,内容包括32码片(chips)的GP与64chips的SYNC_DL,总的时间长度为75μs。 FIG 3 is a DwPTS timeslot burst format, including SYNC_DL 32 chips (Chips) and the GP 64chips, the total length of time of 75μs. 其中,SYNC_DL是一个系统预定的64位PN序列,SYNC_DL最多有32种可能的选择。 Wherein, SYNC_DL predetermined system is a 64-bit PN sequence, SYNC_DL a maximum of 32 possible choices.

图4是P-CCPCH物理信道无线突发格式,内容包括两块352chips的数据(Data symbols)、144chips的用户训练序列(Midamble)以及16chips的GP。 FIG 4 is a P-CCPCH physical channel radio burst format, including two 352chips of data (Data symbols), the user training sequence 144chips (the Midamble) and 16chips the GP. 其中,midamble码是一个基本midamble码的不同循环位移的结果,位移间隔可为8的整数倍,同一小区内只使用一种固定的位移方式,系统共有128个基本midamble码。 Wherein, the results of different midamble code is a cyclic shifts of the basic midamble codes, the displacement distance may be a multiple of 8, only a fixed displacement mode in the same cell, the system a total of 128 basic midamble codes.

在TD-SCDMA系统中,移动台从开机到发出第一个随机接入请求止,分为下行同步捕获、系统信息读取、建立上行同步、随机接入四个过程,本发明中直放站利用该过程的前两步,即下行同步捕获与系统信息读取,获取子帧第二个转换点位置信息。 In the TD-SCDMA system, a mobile station to start from a random access request issued by the first stop is divided into a downlink synchronization acquisition information reading system, the establishment of uplink synchronization, four random access procedure, the present invention repeater with this process the first two steps, i.e., a downlink synchronization acquisition information reading with the system, acquiring the second sub-frame conversion point position information.

图5是本发明直放站获取转换点信息的流程图。 5 is a flowchart of the present invention is the conversion point repeater acquires information. 如图5所示,直放站获取转换点信息的流程如下:步骤01,直放站接收子帧信息。 5, the repeater acquires point information conversion process is as follows: Step 01, the repeater receives the subframe information. 由于直放站只负责增强与转发Node-B发送的信号,所以直放站自身不能完成利用BCH的空闲部分中至少3个比特表示第二个转换点位置信息,该功能只能由Node-B完成,或者由控制Node-B的RNC完成。 Since the repeater is only responsible for the enhanced signal transmission and forwarding Node-B, so that the repeater itself using the BCH free portion can not be completed at least 3 bits of the second converter represents the point position information, the Node-B only by function completed, or by the Node-B control of the RNC.

步骤02,计算DwPTS到达直放站的时间。 Step 02, calculating the repeater time DwPTS arrival. 直放站通过一个或多个匹配滤波器与接收到的DwPTS中的信号进行匹配,得到该时间。 By matching the repeater or a plurality of matched filters DwPTS in the received signal, to obtain the time.

DwPTS时隙的突发格式如图3所示。 DwPTS timeslot burst format as shown in FIG. 系统中相邻小区的SYNC_DL互不相同。 SYNC_DL adjacent cell system different from each other. SYNC_DL包含在TD_SCDMA无线突发中的DwPTS时隙,按照TD-SCDMA的无线帧结构,SYNC_DL在系统中每个子帧时间(5ms)发送一次,并且每次都以恒定满功率值发送该信息。 SYNC_DL contained in the DwPTS timeslot TD_SCDMA radio burst according to a radio frame structure of TD-SCDMA, Time SYNC_DL each subframe (5ms) in a transmission system, and each time the information is transmitted at full power with a constant value. UE接入系统时,对32个SYNC_DL码字进行逐一搜索(即用接收信号与32个可能的SYNC_DL码字逐一互相关),由于该码字彼此间具有较好的正交性,获取相关峰值最大的码字被认为是当前接入小区使用的SYNC_DL。 UE accesses a system 32 for individually search SYNC_DL codewords (i.e. one by cross-correlation with the received signal with the 32 possible codewords SYNC_DL), as the code word with each other between the good orthogonality, obtaining a correlation peak the maximum code word is considered to be currently used cell access SYNC_DL. 同时,根据相关峰值的时间位置也可以初步确定系统下行的定时。 Meanwhile, according to the time position of the correlation peak may also be preliminarily determined downlink timing system. 直放站使用UE接入系统的方法,确定每个子帧中DwPTS的到达直放站的时间。 Repeater system using the access method for UE to determine the time of arrival of the repeater in each subframe DwPTS.

步骤03,获取第一个转换点时间。 03 steps to get the first transition point in time. 如图1所示,DwPTS与第一转换点(GP)有固定的时间关系,所以根据步骤02的结果可以直接得到第一转换点的时间。 As shown in FIG. 1, DwPTS and the first transition point (GP) with a fixed time relationship, it is possible to directly convert a first time point based on the result of step 02.

步骤04,解调TS0时隙的0码道与1码道。 Step 04, the demodulated code channel slot TS0 0 with one code channel. 承载第二转换点位置信息的BCH,在物理层映射到两个基本公共控制物理信道(P-CCPCH1和P-CCPCH2)上,在TD-SCDMA系统中,P-CCPCH1和P-CCPCH2的时隙为固定的TS0,映射到TS0的扩频因子为16的最初两个码道,即0码道与1码道。 BCH carrying a second conversion point position information in the physical layer are mapped onto two substantially common control physical channel (P-CCPCH1 and P-CCPCH2), in the TD-SCDMA system, P-CCPCH1 and P-CCPCH2 slot TS0 is fixed, TS0 mapped to the spreading factor of the first two code channels 16, i.e., 0 code channel with one code channel.

要从Data symbols域中解出系统广播消息,需要得到4个信息:a)无线信道的参数模型;b)当前小区使用的扰码(Scrambling code);c)系统帧号;d)BCH信息使用的扩频因子和扩频码。 Solutions Data symbols from the domain of a system broadcast message, the information needs to be 4: a) a radio channel model parameters; b) scrambling code used by the current cell (Scrambling code); c) the system frame number; d) BCH information used the spreading factor and spreading code.

a).无线信道参数由对无线突发结构中的训练序列(midamble码)解码获得。 A). Parameters obtained by the radio channel (the midamble code) decoding radio burst training sequence structure. 每个SYNC_DL序列对应4个基本midamble码,由于SYNC_DL已经在步骤01获得,直放站只需用相关方法逐一测试这4个基本码的不同相位,既可找到当前系统所用的midamble码,同时可以估计出当前无线信道的参数。 Each sequence corresponds SYNC_DL four basic midamble codes, since SYNC_DL been obtained in step 01, one by one repeater simply test different phases of the four basic code associated with the method, the current system can be found midamble code used, while estimate the parameters of the current radio channel.

b).小区使用的扰码与midamble码是一一对应的,它被用于区分不同小区的用户,在同一个小区内,所有用户使用的扰码和midamble码是相同的。 B). scrambling code and midamble code used by the cell is one to one, which is used to distinguish between users of different cells in the same cell, all the scrambling code and midamble code used by the user is the same.

c).为了正确解出BCH中的信息,直放站必须知道每一帧的系统帧号。 C). In order to properly solve the BCH information, the repeater must know a system frame number of each frame. 系统帧号体现在物理信道4相移相键控(QPSK)调制时相位变化的排列图案中。 System frame number reflected in the arrangement pattern of the phase change physical channel 4 modulation phase-shift keying (QPSK) in. 对n个连续的DwPTS时隙进行相位检测,就可以找到系统帧号,即取得复帧同步。 Of n successive time slot DwPTS phase detection, the system can find the frame number, i.e., to obtain multi-frame synchronization. 这样BCH信息在P-CCPCH信道帧结构中的位置就可以确定了。 Such position information BCH channel P-CCPCH frame structure can be determined.

d).按系统要求,BCH消息的扩频因子为16,码道使用0码道和1码道。 d). The system according to claim BCH message spreading factor is 16, with 0 code channel track and a code track.

根据上述信息,直放站完成对P-CCPCH的解调和BCH的译码,解读系统消息。 According to the above information, Repeater complete decoding the P-CCPCH and BCH demodulation, the message interpretation system.

步骤05,获取第二个转换点时间。 Step 05, to obtain a second time switching points. 从步骤04解调出来的BCH所携带的所有信息中提取第二转换点位置的信息,因为每个时隙的长度是0.675ms,因此根据第二转换点的位置,可以直接得到第二转换点的时间。 Second switching position information of all the information demodulated from step 04 carried by extracting BCH, because the length of each slot is 0.675 ms, and therefore the position of the second transition points, the second transition point can be obtained directly time. 由于上下行时隙分配方式处于不断的变化之中,所以直放站需要在作增强和转发上行信号或下行信号的同时重复步骤04和05,不断获取第二转换点经更新后的时间信息。 Since the uplink and downlink timeslot allocation is constantly changing, so the repeater needs to be enhanced and simultaneously forwarding the uplink signal or downlink signal Repeat steps 04 and 05, continue to acquire time information updated second transition point.

直放站获取每个子帧的转换点信息以后,在子帧第一个和第二个转换点之间只增强和转发上行信号,在第二个和下一子帧的第一个转换点之间只增强和转发下行信号,从而避免了上下行处理系统同时工作。 Repeater acquires information transition points after each subframe, and forwarding only enhanced uplink signal between the sub-frame and a second transition point, the first and the second transition point of the next sub-frame and forwarding the downlink-only signal enhancement, thus avoiding the down-line processing system simultaneously.

Claims (7)

1.一种TD-SCDMA系统中直放站获取转换点的方法,用于增强和转发同一子帧第一个与第二个转换点之间的上行信号,以及增强和转发该子帧第二个转换点与下一子帧中第一个转换点之间的下行信号,其特征在于,该方法包括如下步骤:a.将第二个转换点位置信息放置在广播信道中传输;b.直放站获取子帧第一个转换点的时间;c.解调子帧中0时隙的最初两个码道;d.从步骤c解调的结果中提取第二个转换点位置信息,得到第二转换点的时间。 A TD-SCDMA system to obtain the conversion point repeater method for enhancing the uplink sub-frame, and forwarding the same signal between the first and second switching points, and enhanced and forwarding the second sub-frame a downlink signal between the first switching point and the switching points the next sub-frame, characterized in that the method comprises the steps of:.. a second changeover position information is placed in a broadcast transmission channel; B linear release is obtained at a conversion sub-frame time point; c subframe demodulating the first two code channels for timeslot 0;. D converts the second position information extracted from the demodulated result in step c, to give. time of the second transition point.
2.根据权利要求1所述的TD-SCDMA系统中直放站获取转换点的方法,其特征在于:步骤a所述的利用广播信道传输第二个转换点位置信息是由基站完成的。 The method of the TD-SCDMA system 1 to obtain the conversion point repeater as claimed in claim, wherein: the step of using a broadcast channel transmission according to a second conversion point position information is done by the base station.
3.根据权利要求1所述的TD-SCDMA系统中直放站获取转换点的方法,其特征在于:步骤a所述的利用广播信道传输第二个转换点位置信息是由无线网络控制器完成的。 The method of the TD-SCDMA system 1 to obtain the conversion point repeater as claimed in claim, wherein: the step of using a broadcast channel transmission according to a second conversion point position information is done by the radio network controller of.
4.根据权利要求1所述的TD-SCDMA系统中直放站获取转换点的方法,其特征在于:步骤a所述的第二个转换点位置信息是记录在广播信道空闲部分的至少3个比特中。 The method of the TD-SCDMA system 1 to obtain the conversion point repeater as claimed in claim, wherein: said step of a second conversion point position information is recorded in at least three broadcast channel is idle portion bits.
5.根据权利要求1所述的TD-SCDMA系统中直放站获取转换点的方法,其特征在于:步骤b是通过计算子帧中下行导频时隙到达直放站的时间获取子帧的第一个转换点时间的。 5. The method of TD-SCDMA system in claim 1 to obtain the conversion point repeater as claimed in claim, wherein: step b by calculating the subframe downlink pilot time slot time to reach the repeater acquired subframe the first transition point in time.
6.根据权利要求1所述的TD-SCDMA系统中直放站获取转换点的方法,其特征在于:步骤a所述的利用广播信道传输第二个转换点位置信息是动态更新的。 The TD-SCDMA system according to a method of obtaining the switching point repeater as claimed in claim, wherein: the step of using a broadcast channel transmission according to a second conversion point position information is updated dynamically.
7.根据权利要求1所述的TD-SCDMA系统中直放站获取转换点的方法,其特征在于:所述的步骤c与d重复执行,得到第二个转换点位置的变化情况。 The TD-SCDMA system according to a method of obtaining the switching point repeater as claimed in claim, wherein: said step c and d are repeatedly performed to obtain a second transition point where the change of position.
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