CN100566214C - Communication method for time-division duplex mobile communication system - Google Patents

Communication method for time-division duplex mobile communication system Download PDF

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CN100566214C
CN100566214C CN 200510076922 CN200510076922A CN100566214C CN 100566214 C CN100566214 C CN 100566214C CN 200510076922 CN200510076922 CN 200510076922 CN 200510076922 A CN200510076922 A CN 200510076922A CN 100566214 C CN100566214 C CN 100566214C
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communication
method
time
division
duplex
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CN1878031A (en )
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孙韶辉
王映民
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大唐移动通信设备有限公司
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一种时分双工移动通信系统的通信方法,包括:(1)设置传输时间间隔TTI的最小单位和系统帧结构,每个无线子帧是由若干个业务时隙和包含至少两个转换保护时隙的特殊时隙组成,所述TTI是以所述无线子帧中的一个业务时隙为最小单位;(2)发送端将需要发送的数据按照步骤(1)设定的帧结构进行编码、调制后通过射频发送;(3)接收端接收数据先解调、然后按照步骤(1)设定的帧结构解码后获得对应的数据,随后按照步骤(1)设定的TTI返回接收应答消息,以便发送端发送下一数据,进而完成数据传输。 Communication method for a time division duplex mobile communication system, comprising: (1) setting a transmission time interval TTI minimum unit and system frame structure, each wireless sub-frame is composed of several traffic slots and comprising at least two conversion protection special time slot gap composition, the TTI is a time slot of the radio service subframe as the minimum unit; data (2) to be transmitted by the transmitting end according to step (1) setting a frame structure coding, modulated by a radio frequency transmission; (3) receiving terminal for receiving the first demodulation data, then follow the steps (1) to obtain a corresponding data set in the decoding frame structure, and then according to step (1) receiving a TTI which is set to return a response message, so that the sender sends the next data, thereby completing the data transfer. 特殊时隙还可以包含一个UpPTS和一个DwPTS时隙,或者还包含一个DwPTS时隙。 A special time slot may also contain a DwPTS and UpPTS time slot, or further contains a DwPTS time slot. 通过对TDD帧结构的改进以及降低TTI的单位时间长度,达到降低数据传输时延的效果。 By improving the TDD frame structure and the unit time length of TTI is reduced, the effect to reduce the data transmission delay.

Description

时分双工移动通信系统的通信方法 Time division duplex communication method in a mobile communication system

技术领域 FIELD

本发明涉及移动通信系统中的通信方法,特别涉及一种时分双工(TDD) 移动通信系统中的通信方法。 The present invention relates to a communication method in a mobile communication system, and particularly relates to a communication method for a time division duplex (TDD) mobile communication system.

背景技术 Background technique

无线移动通信系统从频分多址(FDMA)的模拟通信系统发展到现在的第三代移动通信系统,支持的业务从单纯的话音业务发展到现在的数据和话音混和业务,直至高速的数据业务。 Development of wireless mobile communication system the communication system from analog frequency division multiple access (FDMA) to the current third generation mobile communication system that supports traffic from simple voice services to today's mixed voice and data traffic, high speed data service until . TDD移动通信系统也是第三代移动通信标准中采用的其中一种通信方式。 Wherein a communication mode TDD mobile communication system is a third generation mobile communication standard employed. TDD移动通信系统的特点是上行和下行同处于一个频段,不需要成对的频率,因此频谱利用高,上下行资源的相关性小, 这些相对于频分双工(FDD)系统是具有很大优势的。 Characteristics of the mobile communication system is the TDD uplink and downlink in a same frequency band, does not require a pair of frequencies, the high frequency spectrum utilization, the resources associated small vertical lines, which with respect to frequency division duplex (FDD) system having a large advantage.

TDD移动通信系统的物理层帧结构参见图1、图2。 Referring to FIG physical layer frame structure of the TDD mobile communication system 1, FIG. 图1为现有技术TDD系统物理层帧结构示意图,图2为现有技术子帧时隙分配结构的一示意图。 Figure 1 is a schematic view of physical layer frame structure of the prior art TDD system, Figure 2 is a schematic of a prior art slot assignment subframe structure. TDD 系统物理层采用三层结构:无线帧、子帧、时隙。 TDD system physical layer three-layer structure: radio frame, sub-frame, slot. 每个无线帧帧长为10ms, 其包含两个帧长为5ms的子帧;每个子帧包含时隙TS0 -时隙TS6共七个业务时隙,同时,在时隙TS0和时隙TS1之间包含三个特殊时隙:下行导频时隙(DwPTS)、保护时隙(GP)和上行导频时隙(UpPTS)。 Each radio frame is the frame length of 10ms, which comprises two sub-frame length is 5ms frame; each subframe comprises time slots TS0 - a total of seven time slots TS6 traffic slot, while time slots in the time slots TS0 and TS1 of comprising between three special time slots: downlink pilot Time slot (DwPTS), guard period (GP) and an uplink pilot time slot (UpPTS). 下行导频时隙用于系统的下行同步信息的发送,上行导频时隙用于用户接入的上行同步信息发送,保护时隙用于提供下行发送时隙向上行发送时隙转换的时隙间隔。 Uplink synchronization information transmitted downlink pilot time slot for downlink synchronization information system, uplink pilot time slot for transmitting user access, guard time slot for providing a downlink transmission slot to uplink transmission slot period interval.

TDD系统的物理层帧中,时隙TSO固定分配为下行时隙,时隙TS1固定分配给上行时隙,其他上下行业务时隙的分配可以采用对称和不对称两种方式, 即上下行业务时隙可以动态分配。 Physical layer frame of a TDD system, the time slot TSO fixedly allocated downlink slots and TS1 time slot assigned to the uplink timeslot is fixed, the other assigned uplink and downlink service time slots can be used in two ways symmetric and asymmetric, i.e. uplink and downlink service slots may be dynamically allocated. 在3GPP规范中,每个5ms的无线子帧的业务时隙之间有两个上下行转换点(switching Point),在图2中该上下行转换点位于时隙TS0和时隙TS1,以及时隙TS3和TS4之间。 In the 3GPP specifications, there are two downlink switching points (switching Point) traffic slot between each 5ms radio sub-frame, the uplink time slots TS0 and conversion point located slots TS1 in FIG. 2, and when gap between TS3 and TS4. 3GPP规范同时规定时隙TSO固定用于下行消息的发送,时隙TS1固定用于上行消息的发送。 3GPP specification also provides for downlink timeslots TSO message transmission, slot TS1 for transmission of upstream messages fixed. 因此,时 Therefore,

隙TS0和时隙TS1之间的转换点是固定不变的,用于下行业务时隙向上行业务时隙转换。 Transition point between the gaps and slots TS1 TS0 is fixed, for downlink traffic slots to uplink traffic slot conversion. 该转换点为了保证系统上行同步的需要,提供了一个转换保护时隙GP。 The uplink conversion points in order to ensure the system need to be synchronized, there is provided a conversion guard slot GP. 另一个转换点可以在其它任一业务时隙之间,该转换点是上行向下行转换的时间点,没有专门设置转换保护时隙。 Another transition point may be between any of the other traffic timeslots, the switching point is a time point down the line upstream of the conversion, the conversion is not specifically set guard slots.

时分双工移动通信系统的通信过程:发送端将数据按照预先设定的无线帧格式进行编码、调制后通过射频发送,接收端接收射频信号先解调、解码后获得对应的数据,然后通过信道给对端发送接收应答消息,发送端接收到应答消息后进行下一数据的发送,据此类推,完成所有数据的发送。 Time division duplex communication process of the mobile communication system: data sending end encodes and modulates the radio frame according to a predefined format transmitted through radio frequency, the receiving side demodulates the received RF signal to obtain a corresponding decoded data, and then through a channel transmitting to the transmitting end receives a reply message, the next data message sender receives a response, and so accordingly, the transmission of all data is completed.

发送端通常建立一个滑动发送窗口,发送的是处于发送滑动窗口内的数据。 Establishing a transmitting side usually sliding transmission window is transmitted in the transmission of data in the sliding window. 当发送端接收到接收端返回的接收应答消息后,滑动窗口向前滑动,新进入滑动窗口的数据作为下一数据发送。 When the sender receives reception response message returned by the receiver, the sliding window slides forward, the new data is entered as the next sliding window of data transmission. 对于TCP/IP数据业务,每次呼叫吞吐量(Call Throughout)除了与发送滑动窗口的大小有关外,还与数据的传输迟延相关。 For TCP / IP data traffic, the throughput per call (Call Throughout) In addition, further delay associated with the transmission of the transmission data and the size of the outer sliding window related. 在发送滑动窗口的大小一定的情况下,迟延越小,呼叫吞吐量越大。 In the transmission of the sliding window size in certain circumstances, the delay, the larger the call throughput. 在移动通信中,传输迟延与空中接口的无线数据发送时间间隔(Transmission Time Interval,传输时间间隔TTI)的长度有关系,TTI的单位长度越小,其传输时延越小。 In mobile communications, wireless data transfer delay of the air interface transmission time interval (Transmission Time Interval, TTI Transmission Time interval) are related to the length, the smaller the unit length of TTI, the smaller the transmission delay. 目前3GPP规范要求TD-SCDMA系统的空中接口的TTI都是以帧或子帧为单位,如R4版本要求的TTI最小单位为一个帧(10ms) 长度,R5版本的HSDPA要求的TTI为一个无线子帧(5 ms )长度。 Currently air interface specifications 3GPP TD-SCDMA system is a frame TTI or subframe as a unit, such as the minimum unit of TTI Version R4 is one frame (10ms) length, R5 version of HSDPA TTI is a requirement of the wireless slave the frame (5 ms) length.

以TD-SCDMA通信系统为例,简单说明其通信过程。 In TD-SCDMA communication system as an example, the communication process is briefly described. 假设上下行业务时隙配置为1:5 (除TS0), TTI的单位长度为5ms。 Suppose uplink and downlink service time slots configured as 1: 5 (except TS0), TTI unit length of 5ms. 其下行通信过程为:UE先通过接收的DwPTS时隙信息,建立与网络侧同步;然后接收TS0时隙上的广播消息,获得相应配置信息。 During which downlink communication is: UE first through the DwPTS time slot information received, to establish synchronization with the network side; then receives the broadcast message on the time slot TS0 to obtain corresponding configuration information. 当网络端要发送数据至UE,网络侧通过TSO时隙发送呼叫该UE的呼叫信息,UE通过UpPTS时隙发送随机接入信息到网络端。 When the network to send data to the UE, the network side transmits the call information of the call time slot TSO by UE, UE transmits the random access message to the network side through UpPTS time slot. 网络端接收到UE的随机接入消息后,会给UE发送其控制消息,同样,UE也会对网络端应答消息。 After the network receives a random access message from the UE, the UE will send its control message, similarly, UE a response message to the network also. 网络端给UE分配相应的信道资源,两者通过这个被分配的信道资源进行通信。 The network to the UE assigned a respective channel resources, both to communicate via the allocated channel resources.

网络端选择在第N个子帧的TS2时隙上发送数据,接收端UE在接收到数据并进过相应的处理后,需要向网络端发送一个接收应答消息。 Selecting the network time slot TS2 to transmit data on the N th frame, the receiving end after the UE receiving the corresponding processing data in hand, and needed to send a reply message to the receiving network. 由于TTI的大小为5ms,因此UE最快也必须在下一个子帧发送接收应答消息:即UE在第N+1 个子帧的TS1时隙中向网络端发送应答消息,从第N个子帧的TS2时隙到N+1 个子帧的TS1时隙之间的时延比较大。 Because the size of TTI is 5ms, the UE must be the fastest next subframe transmitting and receiving a response message: the UE sends a response message to the network in the first time slot TS1 N + 1 th frame, TS2 from the N subframes N slot to time slot delay between TS1 + 1 subframe is relatively large. 也就是目前存在UE等待发送的时间过长,从而造成传输时延较长,由此使用户的呼叫吞吐量受到影响。 I.e. the UE waits for transmission at present time is too long, resulting in longer transmission delay, thereby enabling the user's call throughput is affected. 发明内容 SUMMARY

本发明的目的在于提供一种时分双工移动通信系统的通信方法,以解决现有技术中发送端等待接收端返回接收应答消息的时间过长,从而造成传输时延较长,进而影响吞吐量受影响的技术问题。 Object of the present invention to provide a communication method for a time division duplex mobile communication system to solve the prior art transmitting side waits to receive a response message returned from the reception time is too long, resulting in longer transmission delay, and thus affect the throughput affected by technical problems.

为解决上述问题,本发明公开一种时分双工移动通信系统的通信方法, 包括:(1)设置传输时间间隔TTI的最小单位和系统帧结构,每个无线子帧是由若干个业务时隙和包含至少两个转换保护时隙的特殊时隙组成,所述TTI 是以所述无线子帧中的一个业务时隙为最小单位;(2)发送端将需要发送的数据按照步骤(1)设定的帧结构进行编码、调制后通过射频发送;(3)接收端接收射频信号先解调、然后按照步骤(1 )设定的帧结构解码后获得对应的数据,随后按照步骤(1 )设定的TTI返回接收应答消息,以便发送端发送下一数据包,进而完成数据传输。 To solve the above problems, the present invention discloses a time division duplex communication method in a mobile communication system, comprising: (1) setting a transmission time interval TTI minimum unit and system frame structure, each wireless sub-frame is composed of a plurality of traffic slots and special time slot comprises at least two conversion guard slots composition for the TTI is one traffic time slot in the radio sub-frame is a minimum unit; data (2) to be transmitted by the transmitting end according to step (1) setting a frame structure is encoded, modulated by a radio frequency transmitter; (3) first signal receiver to receive a radio frequency demodulation, then follow the steps (1) to obtain a corresponding data set in the decoding frame structure, and then according to step (1) TTI set receive a response message returned to the sender sends the next packet, thereby completing the data transfer.

步骤(1 )是根据系统对应答时间间隔时延的要求设定转换保护时隙的数 Step (1) is converted guard slot is set according to system requirements in response to the number of delay intervals

目,所述数目M满足^》M》2, N为每一子帧中业务时隙数目。 Currently, the number M satisfying ^ "M" 2, N is the number of traffic slots of each subframe.

步骤(1)中设定的特殊时隙还可以包含一个上行导频时隙UpPTS和一个下行导频时隙DwPTS,设定的UpPTS和DwPTS可以以若干个子帧数为周期间隔发送,或者步骤(1)设定的特殊时隙还可以包含一个DwPTS,设定的DwPTS可以以若干个子帧数为周期间隔发送。 Step (1) in the special time slot may also comprise a set of uplink pilot time slot UpPTS and a downlink pilot time slot DwPTS, UpPTS and the DwPTS may be set in a plurality of sub-frames is transmitted at periodic intervals, or step ( 1) set special time slot may also comprise a DwPTS, a set number of sub-frames may be DwPTS is transmitted at periodic intervals.

在步骤(l)设定的子帧结构中,时隙TSO为下行时隙,时隙TS1为上行时隙,相邻两个转换保护时隙间的最小时间间隔为2个业务时隙,且一个子帧中最后一个转换保护时隙之后至少还有一个业务时隙,如果子帧中存在DwPTS,则该DwPTS位于时隙TS0之后,如果子帧中存在UpPTS,该UpPTS 位于第K个转换保护时隙之后,M>K>1, M为每一子帧中转换保护时隙的个数。 In the subframe structure setting step (l), the time slot TSO downlink slots and uplink slots slot TS1, when two adjacent protection conversion of interstitial minimum time interval of two service time slots, and after a last subframe converter there is at least one traffic time slot following the guard slots, DwPTS if the subframe exists, the time slot TS0, DwPTS is located, if there UpPTS subframes, the UpPTS is located in the K-th conversion protection after the time slot, M> K> 1, M is in each subframe the number of protection time slots of conversion.

在步骤(1 )设定每个子帧中业务时隙的个数大于等于7。 Set traffic slots in each subframe in step (1) number of 7 or greater. 步骤(2)之前还包括:发送端建立一个滑动发送窗口,需要发送的数据位于发送滑动窗口;步骤(3)还包括:若发送端在预先设定的时间内接收到接收端返回的接收应答消息,滑动窗口向前滑动,新进入滑动窗口的数据作为下一预发送的数据进行发送。 Before step (2) further comprises: establishing a sending end a sliding transmission window, the transmission data to be transmitted is located in the sliding window; Step (3) further comprising: when the transmitting end receives the reception response returned by the receiver within a predetermined period of time message, the sliding window slides forward, the new data into the data of the next sliding window as the pre sent transmitted.

本发明公开了第二种时分双工移动通信系统的通信方法,包括:(l)设置传输时间间隔TTI的最小单位和系统帧结构,每个无线子帧是由若干个业务时隙和包含至少两个转换保护时隙的特殊时隙组成,所述TTI是以所述无线子帧中的一个业务时隙为最小单位;(2)用户终端先建立与网络侧的同步, 然后通过接收TSO时隙,获得由网络侧发送的广播消息,进而得到其配置信息,所述配置信息包括步骤(1 )设定的TTI和系统帧信息;(3)网络侧/用户终端向对端发送呼叫信息,对端按照步骤(1)设定的TTI进行呼叫应答;(4 ) 网络侧向用户终端分配信道资源,网络侧和用户终端通过所述被分配的信道资源建立通信。 The present invention discloses a communication method in a second time division duplex mobile communication system, comprising: (l) setting a transmission time interval TTI minimum unit and system frame structure, each wireless sub-frame is composed of a plurality of traffic slots and comprising at least conversion two special time slot guard slots composition for the TTI is one traffic time slot in the radio sub-frame is a minimum unit; (2) the user terminal to establish synchronization with the network side, and by receiving the time TSO gap, obtaining broadcast message sent by the network side, and thus obtain its configuration information, the configuration information includes TTI and system frame information in step (1) is set; (3) the network side / user sending call information to the terminal on the end, the peer according to step (1) set in the TTI call answering; (4) the network side allocating the channel resources to the terminal, the network side and the user terminal establishes a communication channel by the allocated resource.

步骤(1)是根据系统对应答时间间隔时延的要求设定转换保护时隙的数 Step (1) is converted guard slot is set according to system requirements in response to the number of delay intervals

目,所述数目M满足^UM》2, N为每一子帧中业务时隙数目。 Currently, the number M satisfies ^ UM "2, N is the number of traffic slots in each sub-frame.

2 2

步骤(1)中设定的特珠时隙还可以包舍一个上行导频时隙UpPTS和一个下行导频时隙DwPTS,设定的UpPTS和DwPTS可以以若干个子帧数为周期间隔发送,或者步骤(1)设定的特殊时隙还可以包含一个DwPTS,设定的DwPTS可以以若干个子帧数为周期间隔发送。 Step (1) set special beads may be coated round a further slot uplink pilot time slot UpPTS and a downlink pilot time slot DwPTS, UpPTS and the DwPTS may be set in a plurality of sub-frames is transmitted at periodic intervals, or step (1) set special time slot may also comprise a DwPTS, a set number of sub-frames may be DwPTS is transmitted at periodic intervals.

在步骤(1 )设定的子帧结构中,时隙TSO为下行时隙,时隙TS1为上行时隙,相邻两个转换保护时隙间的最小时间间隔为2个业务时隙,且一个子帧中最后一个转换保护时隙之后至少还有一个业务时隙,如果存在上行导频时隙,则所述上行导频时隙位于第K个转换保护时隙之后,M》K>1, M为每一子帧中转换保护时隙的个数。 Subframe structure in step (1) is set in the time slot TSO downlink slots and uplink slots slot TS1, when two adjacent protection conversion of interstitial minimum time interval of two service time slots, and after a sub-frame after the last conversion guard slot there is at least one traffic time slot, uplink pilot time slot if present, the uplink pilot time slot is located in the K-th conversion guard slot, M "K> 1 , M being converted in each subframe the number of protection time slots.

步骤(2)中如果子帧中存在下行导频时隙,用户终端通过接收下行导频时隙建立与网络侧的同步,否则将通过下行业务时隙上的信息建立与网络侧的同步。 Step (2) If there is a downlink pilot time slot sub-frame, the user terminal and the network side establishes synchronization by receiving the downlink pilot time slot, otherwise, to establish synchronization with the network side via the information on the downlink traffic slot.

步骤(4)中网络侧和用户终端通过所述被分配的信道资源建立通信具体包括:发送端将需要发送的数据按照步骤(1 )设定的帧结构进行编码、调制后通过射频发送;接收端接收射频信号先解调、并按照步骤(1)设定的帧结构解码后获得对应的数据包,然后按照步骤(1 )设定的TTI单位返回接收应 Step (4) the network side and the user terminal comprises establishing a communication channel resources through the allocated: data transmitting terminal to be transmitted is coded according to the frame configuration in step (1) is set, by transmitting modulated radio frequency; receiving receives a radio frequency signal to demodulate, and follow the steps (1) to obtain a corresponding set of data packets decoded frame structure, and then follow the steps (1) to set a TTI reception unit should return

答消息,以便发送端发送下一数据,进而完成数据传输。 A message to the sender sends the next data, thereby completing the data transfer.

与现有技术相比,本发明具有以下优点:本发明通过改进TDD系统的帧结构:在每一子帧中增设保护时隙的个数,以及与降低系统的TTI单位时间长度相结合,达到降低通信过程中的数据传输延时的效果。 Compared with the prior art, the present invention has the following advantages: the present invention, by improving a frame structure of the TDD system: an additional guard slot in each subframe number and TTI length per unit time of the reduction system in combination, to achieve reducing data transmission delay during communication effects.

另外,本发明通过改进TDD系统的帧结构:将上下行导频时隙按一子帧数为周期间隔发送以及提高每一子帧中的业务时隙的个数,以此提高传输的数据量,进而提高传输数据的速率。 Further, the present invention is improved by the frame structure of the TDD system: a downlink pilot time slot according to a periodic interval subframe number and increasing the number of transmission of each subframe traffic slots, thereby increasing the amount of data transmission , thereby improving the rate of data transmission.

还有,本发明通过改进TDD系统的帧结构:将上下行导频时隙的设定间距加大发送,减少上下行同步时的干扰。 Further, the present invention is improved by the frame structure of the TDD system: the downlink pilot time slot is set to increase the transmission distance, to reduce the interference for the downlink synchronization.

附图说明图1是现有技术中TDD移动通信系统的物理层帧结构示意图; 图2是现有技术子帧时隙分配结构的一示意图; 图3是本发明公开的一种时分双工移动通信系统的通信方法的流程图; 图4是本发明TDD移动通信系统的一种物理层帧结构示意图; 图5是本发明公开的另一种时分双工移动通信系统的通信方法的流程图; 图6是本发明子帧时隙分配结构的一示意图。 BRIEF DESCRIPTION OF DRAWINGS FIG. 1 is a schematic diagram of the physical layer frame structure of the prior art TDD mobile communication system; FIG. 2 is a schematic view of a prior art slot allocation sub-frame structure; FIG. 3 is a time division duplex mobile disclosure of the present invention a flowchart of a communication method of a communication system; FIG. 4 is a schematic diagram of the physical layer frame structure of the present invention TDD mobile communication system; FIG. 5 of the present invention is disclosed in a flowchart of another method in a mobile communication time division duplex communication system; FIG 6 is a schematic view of a sub-frame time slot allocation structure of the present invention. 具体实施方式 detailed description

以下结合附图,具体说明本发明。 In conjunction with the following drawings, detailed description of the present invention.

目前3GPP规范要求TD-SCDMA通信系统的TTI以帧或子帧为单位。 Currently 3GPP specifications TD-SCDMA communication system, a frame or TTI units of subframes. 为了减少无线接入网络的传输时延,申请人考虑到減少TTI的时间长度单位。 In order to reduce the transmission delay of the radio access network, considering the applicant to reduce the time length of the TTI unit. 比如以业务时隙为单位设定TTI的最小单位,以此来减少应答时间间隔。 Such as in traffic slot unit is set as the minimum unit of TTI, in order to reduce the response time interval. 假设网络侧和用户终端的物理层是采用图2公开的帧结构,虽然TTI的最小单位为一个业务时隙,但是由于上下行转换点少,数据传输应答时间间隔并不能明显地降低的情况。 Suppose the physical layer network side and the user terminal is to use a frame structure disclosed in FIG. 2, although the minimum unit of TTI is a traffic slot, but due to the small downlink switching points, the data transmission time interval and where the response is not reduced significantly. 为了应答TS2时隙发送的数据,下行发送数据必须在下一个无线子帧的TS1时隙上发送,应答时间间隔为5ms。 In order to response data transmitted slot TS2, the data must be transmitted on a downlink time slot TS1 of the next subframe, a radio transmission, the response time interval is 5ms. 可见,单纯地减少TTI的单位时间长度,对于发送数据仍不能从根本上降低应答时间间隔。 Seen, simply reducing the time length of the unit of TTI, transmission data response still reduced from the fundamental interval.

为此,本申请人得出:为了降低应答时间间隔,除了减少TTI的时间长度, 还需要采用其他措施:对TDD系统的帧结构进行改进,以便在同一子帧中增加保护时隙的个数,进而降低应答时间间隔。 For this reason, the present applicant obtained: In order to reduce the response time interval, in addition to reducing the time length of TTI, but also other measures: a frame structure for a TDD system is modified so as to increase the protection time slots in the same sub-frame number , thereby reducing the response time interval.

请参阅图3,其为本发明公开的一种时分双工移动通信系统的通信方法的流程图。 Refer to FIG. 3, a flowchart of a communication method disclosed in time division duplex mobile communication system to which the present disclosure. 它包括以下步骤: Comprising the steps of:

S110:设置传输时间间隔TTI的最小单位和系统帧结构,每个无线子帧是由若干个业务时隙和包含至少两个转换保护时隙的特殊时隙组成,TTI是以业务时隙为最小单位;S120:发送端将需要发送的数据包按照步骤S110设定的帧结构进行编码、 调制后通过射频发送; S110: setting a transmission time interval TTI is a minimum unit and system frame structure, each wireless sub-frame is composed of a plurality of traffic slots and comprising at least two slots convert protected special time slots, TTI is a minimum traffic slot unit; S120: sends the data to be transmitted in accordance with a frame structure set in step S110 is encoded, modulated by a radio frequency transmission;

S130:接收端接收射频信号先解调、并按照步骤S110设定的帧结构解码后获得对应的数据包,然后按照步骤Sl 10设定的TTI单位返回接收应答消息, 以便发送端发送下一数据包,进而完成数据传输。 S130: receiving a radio frequency signal to the receiving terminal demodulates the corresponding data packet is obtained and set in step S110 according to the decoding of a frame structure, and then returns a response message receiving unit according to TTI set in step Sl 10, so that the sender sends the next data package, thereby completing the data transfer.

请参阅图4,其为本发明改进的TDD—种帧结构示意图。 Please refer to FIG. 4, a schematic view of the improved frame structure which TDD- species present invention. 在图4中,为了保持后向兼容性, 一个帧的长度仍然为10ms,每个帧由两个5ms的无线子帧组成。 In FIG. 4, for maintaining backward compatibility, the length of one frame is still 10ms, each frame consists of two radio sub-frames of 5ms. 每个无线子帧由N个时隙和多个特殊时隙组成。 Each radio sub-frame consists of N slots and a plurality of special time slots. 特殊时隙至少包括两个及以上的保护时隙GP。 Special time slot comprises at least two or more of the guard time GP. 特殊时隙还可以包含一个DwPTS和一个UpPTS,也可以还包含一个DwPTS。 A special time slot may also contain a DwPTS and UpPTS, may further contain a DwPTS. 对于新子帧中,新子帧中特殊时隙的作用与原子帧相同。 The new sub-frame, a new subframe special time slot for the same effect with the atoms to frame. 如果存在下行导频时隙,则该时隙用于系统的下行同步信息的发送,否则通过下行业务时隙发送下行导频信息。 If the presence of the downlink pilot time slot, the time slot used to transmit system downlink synchronization information, or by transmitting the downlink pilot information of downlink traffic slot. 如果存在上行导频时隙,则该时隙用于用户接入的上行同步信息发送,否则通过上行业务时隙的进行发送上行导频, If there is uplink pilot time slot, the time slot for the uplink synchronization information of user access transmission, or transmitting an uplink pilot time slot by the uplink service,

本发明设定的帧结构中增加了保护时隙GP的数目。 The present invention is set in a frame structure increases the number of guard period GP. 保护时隙是TDD系统中用于下行时隙向上行时隙转换的保护间隔。 Guard slot is the time slot for the downlink TDD system, the guard interval time slot to uplink conversion. 由于每个子帧中增设了GP的数量,又由于减少了TTI的最小单位,减少了返回应答消息的时间间隔,进而达到降低数据传输时延的效果。 Since each sub-frame the number of additional GP, and because the minimum unit of TTI is reduced, reducing the time interval returns a response message, thereby achieving the effect of reducing data transmission delay. 并且,本发明可以根据系统对应答时间间隔时延的要求设定保护时隙的数目:比如每个由下行向上行转换的时间点之间都 And the number, the present invention can be set according to system requirements the protection time slot for the response delay time intervals: for example, converted at each time point between the downlink direction rows are

设置一个GP。 Set a GP. 保护时隙的数目M满足^2M22, N为每一子帧中业务时隙 Guard slot number satisfies M ^ 2M22, N sub-frame for each traffic slot

2数目。 2 number.

在本发明的子帧结构中,增加业务时隙的数目。 In the subframe structure of the present invention, an increase in the number of traffic slots. 随着人们对通信系统的要求越来越高,网络侧和用户终端传输的数据也越来越多。 As people demand more and more of the communication system, the network side and the user terminal data transmission is also increasing. 比如,人们已经不满足于通过家里的计算机技术网络,而是希望实现在任何地点都能够接受诸如发送电子邮件,进行网络浏览等数据业务。 For example, people are not satisfied by home computer network technology, but to achieve that would be acceptable in any place such as sending e-mail, Web browsing and other data services. 因此,通信系统的发展也逐步由单純服务话音的系统向支持高速数据的系统发展。 Therefore, the development of communication systems gradually from a simple voice service system to support the development of high-speed data system. 在本发明的子帧结构中,通过增设业务时隙的数目来提高传输数据的效率。 In the subframe structure of the present invention to improve the efficiency of data transmission by adding the number of traffic slots. 现在每个子帧时隙数目为N,且满足不等式W》7。 Now the number of slots per sub-frame N, and satisfies the inequality W "7. 为了支持如话音通信、可视电话通信等上行和下行业务量对称的业务,因此,设置时隙数目N为大于7的奇数。 In order to support uplink and downlink traffic, such as voice communication, videophone communication traffic symmetrical, therefore, provided N is an odd number greater than the number of slots 7.

同时,考虑到上下行导频时隙主要是用于UE与网络侧建立同步。 Meanwhile, considering the downlink pilot time slot it is mainly used for UE to establish synchronization with the network side. 为了减 In order to reduce

少干扰,在本发明的子帧结构中,如果存在下行导频时隙和上行导频时隙, Less interference, in a subframe structure of the present invention, if there is downlink pilot time slot and an uplink pilot time slot,

两个特殊时隙可以按若干个子帧数为周期间隔发送。 Two special time slots can be transmitted at periodic intervals of several sub-frames. 即:DwPTS和UpPTS 时隙中的信息可以在每个子帧中都发送,也可以按一定子帧数为周期间隔发送。 Namely: DwPTS and UpPTS time slot information may be both transmitted in each subframe may be transmitted to a certain number of subframes periodic intervals. 当DwPTS和UpPTS时隙的信息按一定子帧数为周期间隔发送时,两者可以在同一子帧中同时发送,也可以在不同的子帧中发送。 When the information DwPTS and UpPTS time slot by a certain number of subframes is transmitted at periodic intervals, both may be simultaneously transmitted in the same subframe, may be sent in different subframes. DwPTS和UpPTS 时隙信息发送的周期可以相同,也可以不同。 DwPTS and UpPTS timeslot period information transmitted may be the same or different.

在设定的子帧结构中,时隙TSO还是固定为下行时隙,时隙TS1还是固定为上行时隙。 In the subframe configuration in the set, or a fixed time slot is a downlink time slots TSO, TS1 or fixed time slots are uplink slots. 及设置相邻两个保护时隙间的最小时间间隔为2个业务时隙, 且一个子帧中最后一个保护时隙之后至少还有一个业务时隙。 At least one traffic time slot and disposed after the two neighboring protected interstitial minimum time interval of two service time slots, and a last subframe in a guard slot.

还有,在现有技术中下行导频时隙、保护时隙和上行导频时隙为相邻的时隙,在传输过程中上下行导频时隙之间存在着较强的干扰,为此,本发明改进的子帧结构中,如果同时存在一个上行和一个下行导频时隙,可以将上下行导频时隙在位置上分开。 Further, in the prior art, a downlink pilot time slot, and guard time uplink pilot time slot adjacent to a time slot in the transmission process there is strong interference between uplink and downlink pilot time slot, as here, the present invention is an improved structure of a subframe, if there is a simultaneous uplink and a downlink pilot time slot may be separated uplink pilot time slot in position. 比如将下行导频时隙(DwPTS )还是设置在TS0 之后,上行导频时隙位于第K个保护时隙之后,M>=K>1, M为每一子帧中保护时隙的个数。 For example, after the downlink pilot time slot (DwPTS) is set after the TS0, the uplink pilot time slot K located on the guard slots, M> = K> 1, M is the number of protection time slots in each subframe .

以下以分组数据的传输为例,具体说明TDD系统的数据通信。 The following example to transmit packet data, communication data specifying the TDD system. 假设网络端有数据发送到UE端,网络端的数据业务传输到TCP层后,网络端在TCP 层建立一个滑动发送窗口,该窗口的大小由发送端的存储能力和业务类型决定的。 Suppose the network terminal UE has data to send, a data transmission service to the network layer of the TCP, the network to establish a sliding layer of the TCP send window, the window size is determined by the transmitting side storage capacity and service type. TCP层将数据发送到IP层进行路由及相关工作后发送到RAN系统的PDCP层。 The TCP layer sends back to the IP layer routing and operational data related to the PDCP layer RAN system. PDCP层进行IP头压缩,并对数据包进行分段后传递到RLC层,并由RLC层传输到MAC层,经过RLC层和MAC层的相关处理后到达物理层的数据,物理层根据步骤S110的设定对要发送数据进行相应的编码、调制和波束成型后交到射频进行发送。 Layer PDCP IP header compression, and is transmitted to the RLC layer segments the packets, transmitted by the RLC layer to the MAC layer, after the correlation processing of RLC layer and the MAC layer, the data reaches the physical layer, the physical layer according to step S110 after the setting of the transmission data corresponding to coding, modulation and radio transmission beamforming handed.

通过无线传输后,UE接收到射频信号,经过本端的物理层、MAC层、 RLC层和PDCP层的相应处理后,到达IP层,并由IP处理后递交到TCP层, TCP层如果正确接收到发送端的数据包,将通过信道给网络层发送一个接收应答消息,并将接收数据包递交到应用层。 By the wireless transmission, the UE receives radio frequency signals through the local physical layer, after appropriate treatment MAC layer, the RLC layer and the PDCP layer, reach the IP layer, by the IP process submitted to the TCP layer, a TCP layer, if correctly received packet sending end, sent over a channel to the network layer receives the reply message, and receive packets submitted to the application layer.

为了保证可靠、顺序传输,网络端向UE发送的数据包必需处在发送滑动窗口内,当网络端接收到UE的接收应答消息后,滑动窗口向前滑动,新进入窗口的数据将被发送。 To ensure reliable, sequential transmission, the network sends data packets to the UE is within the required transmit sliding window, when the network receives the UE receives the response message, the sliding window slides forward, the new data will be sent into the window. 如果没有接收到UE的应答消息且发送滑动窗口内数据包都发送出去了,则网络端会等待应答消息而不再发送数据。 If no reply message is received the UE transmits the sliding window and sends out the packet, the network will wait for the response message no longer transmit data. 如果等待接收的应答消息超时,网络端将丢弃该分组。 If the time-out waiting to receive the reply message, the network will discard the packet. 从网络端发送数据到UE,并由UE 返回接收应答消息的这^^时间称为传输时延。 Transmitting data from the network to the UE, a response message received by the UE returns ^^ this time is called transmission delay. 发送端的一个呼叫吞吐量(Call Throughout)由发送端发送滑动窗口的大小和传输时延决定,且满足以下不等式(1): Sending end a call throughput (Call Throughout) transmitted by the transmitting end of the sliding window size and transmission delay decisions, and satisfy the following inequality (1):

即呼叫吞吐量由发送滑动窗口大小和传输时延决定。 That call throughput is determined by the size of transmit sliding window and transmission delay.

在上面的描述中,可以看出,在滑动窗口一定的条件下,呼叫吞吐率的大小由传输时延决定。 In the above description, it can be seen that, under certain conditions the sliding window, the call throughput is determined by the size of the transmission delay. 在移动通信传输中,TTI决定了发送端的处理时间长度, 发送时间长度,和接收端的处理时间长度。 In a mobile communication transmissions, the TTI determines the length of processing time of the transmitting side, the transmission time length, the length of the processing time and the receiving end. 这些时间长度与TTI成正比,TTI 越小,时间长度越短,时延越小,在有限时间内,呼叫吞吐量越大。 The length of time proportional to TTI, TTI smaller, the shorter the length, the smaller the delay, for a limited time, the greater the call throughput. 针对现有的TD-SCDMA系统,其通信方法为(请参阅图5 ): S210:设置传输时间间隔TTI的最小单位和系统帧结构,每个无线子帧业务时隙为最小单位。 For existing TD-SCDMA system, its communication method (see FIG. 5): S210: setting a transmission time interval TTI minimum unit and system frame structure, each wireless sub-frame is the smallest unit of traffic slots.

S220:用户终端先建立与网络侧的同步,然后通过接收TSO时隙,获得由网络侧发送的广播消息,进而得其配置信息,所述配置信息包括步骤S210 设定的TTI和系统帧信息。 S220: the user terminal to establish synchronization with the network side, and by receiving the time slot TSO, to obtain the broadcast message sent by the network side, thereby obtaining the configuration information, the configuration information TTI and a system frame comprises a set of step S210.

步骤S220中如果子帧中存在下行导频时隙,用户终端通过接收下行导频时隙建立与网络侧的同步,否则将通过下行业务时隙上的信息建立与网络侧 Step S220 if there is a downlink pilot time slot sub-frame, the user terminal by receiving a downlink pilot time slot to establish synchronization with the network side, otherwise establish a network-side through the information on the downlink traffic slots

的同步。 Synchronization.

用户终端通过接收下行导频时隙的信息,建立与网络侧的同步。 The user terminal by receiving information of the downlink pilot time slot frequency, establish synchronization with the network side. 下行导频时隙通常设置在子帧的TSO时隙之后,即便下行导频时隙是以若干个子帧为周期发送时,用户终端通过若干个子帧的接收也能从子帧的TSO时隙后获得下行导频时隙的信息。 After the downlink pilot time slot TSO is usually disposed after the slot of the subframe, even when a downlink pilot time slot is transmitted to a plurality of subframe periods, the user terminal by receiving a plurality of subframes, a subframe also from time slot TSO obtaining information of the downlink pilot time slot. 然后,用户终端根据下行导频时隙的位置即可获得TSO时隙上的广播消息,进行本端的相应配置。 Then, the position of a user terminal downlink pilot time slot according to the broadcast message on the obtained time slot TSO, corresponding configuration for this end.

如果不存在单独的下行导频时隙,网络端可以通过某个固定的下行业务 If a separate downlink pilot time slot does not exist, the network can be a fixed downlink service

时隙的固定信道发送相应的导频信息,该导频信息同样可以使终端UE捕获并进行与网络端的同步。 Fixed channel transmission time slot information corresponding pilot, the pilot information may also be captured and that the terminal UE is synchronized with the network.

同样,在终端UE接入过程中,如果不存在单独的上行导频时隙,UE可以通过网络侧分配的某个固定上行业务时隙的固定信道发送上行同步信息, 进而与网络端实现上行同步。 Similarly, the terminal UE access process, if there is no separate uplink pilot time slot, UE may be fixed to a fixed uplink traffic channel time slots allocated by the network side sending the uplink synchronization information, so as to realize uplink synchronization with the network .

S230:网络侧/用户终端向对端发送呼叫信息,对端按照步骤S210设定的TTI进行呼叫应答。 S230: the network side / user sending call information to the terminal on the terminal end of the set according to the TTI in step S210 call answering. 对于下行业务而言,是网络侧向用户终端发送呼叫信息。 For downlink traffic, the user terminal is the network side transmits the call information. 对于上行业务而言,是用户终端向网络侧发送呼叫信息。 For upstream traffic, the user terminal transmits the call information to the network side. 还是以下行业务为例说明其过程,当网络侧要发送数据至UE时,网络端通过TSO时隙上的信道发送呼叫该UE的呼叫信息,UE按照网络侧采用的子帧结构可以对接收到的信息进行解码,解调后获得呼叫信息,如果子帧存在上行导频信道,终端在下一个上行导频时隙发送随机接入信息至网络端,否则终端通过上行业务时隙发送随机接入信息至网络端。 The following is an example downlink service the process, when the network side to send data to the UE, the network sends a call the call information of the UE through a channel in the time slot TSO, subframe structure adopted by the UE according to the received network side the information is decoded, demodulated to obtain call information, if a subframe uplink pilot channel exists, a next terminal uplink pilot time slot transmits the random access message to the network, or a terminal transmits a random access message via uplink service time slot to the network. 网络端按照设定的子帧结构接收信息,获得随积4姿入消息后,给UE发送相应的控制消息(包括一些接入控制),同样, UE会返回对应的应答消息。 Receiving the network information in the sub-frame configuration is set, with the product obtained after the posture message 4, the UE sends a corresponding control message (including some access control), similarly, UE returns a corresponding response message.

S240:网络侧向用户终端分配信道资源,网络侧和用户终端通过所述被分配的信道资源建立通信。 S240: the network side allocating the channel resources to the terminal, the network side and the user terminal establishes a communication channel by the allocated resource. 网络侧和用户终端通过所述被分配的信道资源建立通信具体包括:al:发送端将需要发送的数据按照步骤S210设定的帧结构进行编码、调制后通过射频发送;a2接收端接收射频信号先解调、并按照步骤S210设定的帧结构解码后获得对应的数据包,然后按照步骤S210设定的TTI 单位返回接收应答消息,以便发送端发送下一数据,进而完成数据传输。 The network side and the user terminal comprises establishing a communication channel resources through the allocated: al: transmitting terminal data to be transmitted in accordance with a frame structure set in step S210 is encoded, modulated by a radio frequency transmission; A2 receiving end receives RF signal first demodulator, and in accordance with a frame structure set in step S210 to obtain a corresponding decoded packet, then step S210 is set according to a TTI unit receives a response message returned to the sender sends the next data, thereby completing the data transfer.

从上可知,在网络侧与UE建立数据通信时,两者之间的交互时非常频繁的。 From the above, when establishing data communication network side and the UE, when the interaction between the two is very frequent. 每一次交互,都需要按照设定的子帧结构进行解码,减少TTI的单位时间长度,可以降低交互时间间隔,由此提高数据传输的速率。 Every interaction, need to be decoded in the subframe configuration setting, reducing TTI unit time length can be reduced interaction time interval, thereby increasing the rate of data transmission.

以下介绍步骤S210的子帧结构设置。 The following describes the structure of a subframe set in step S210. 本发明设定的帧结构中增加了保护时隙GP的数目。 The present invention is set in a frame structure increases the number of guard period GP. 保护时隙是TDD系统中用于下行时隙向上行时隙转换的保护间隔。 Guard slot is the time slot for the downlink TDD system, the guard interval time slot to uplink conversion. 由于每个子帧中增设了GP的数量,又由于减少了TTI的最小单位,减少了返回应答消息的时间间隔,进而达到降低数据传输时延的效果。 Since each sub-frame the number of additional GP, and because the minimum unit of TTI is reduced, reducing the time interval returns a response message, thereby achieving the effect of reducing data transmission delay. 并且,本发明可以根据系统对应答时间间隔时延的要求设定保护时隙的数目:比如每个由下行向上行转换的点之间都设置一个GP。 Further, the present invention may be protected by a set number of slots according to the requirements of the system response delay time intervals: for example, a GP are disposed between each point line is converted by the downstream direction. 保护时隙的数目M满足 The number of guard slot satisfies M

^^ikr22, N为每一子帧中业务时隙数目。 ^^ ikr22, N is the number of traffic slots in each sub-frame.

在本发明的子帧结构中,增加业务时隙的数目。 In the subframe structure of the present invention, an increase in the number of traffic slots. 随着人们对通信系统的要求越来越高,网络侧和用户终端传输的数据也越来越多。 As people demand more and more of the communication system, the network side and the user terminal data transmission is also increasing. 比如,人们已经不满足于通过家里的计算机技术网络,而是希望实现在任何地点都能够接受诸如发送电子邮件,进行网络浏览等数据业务。 For example, people are not satisfied by home computer network technology, but to achieve that would be acceptable in any place such as sending e-mail, Web browsing and other data services. 因此,通信系统的发展也逐步由单纯服务话音的系统向支持高速数据的系统发展。 Therefore, the development of communication systems gradually from a simple voice service system to support the development of high-speed data system. 在本发明的子帧结构中,通过增设业务时隙的数目来提高传输数据的效率。 In the subframe structure of the present invention to improve the efficiency of data transmission by adding the number of traffic slots. 现在每个子帧时隙数目为N,且满足不等式W》7。 Now the number of slots per sub-frame N, and satisfies the inequality W "7. 为了支持如话音通信、可视电话通信等上行和下行业务量对称的业务,因此,设置时隙数目N为大于7的奇数。 In order to support uplink and downlink traffic, such as voice communication, videophone communication traffic symmetrical, therefore, provided N is an odd number greater than the number of slots 7.

同时,考虑到上下行导频时隙主要是用于UE与网络侧建立同步。 Meanwhile, considering the downlink pilot time slot it is mainly used for UE to establish synchronization with the network side. 为了减 In order to reduce

少干扰,在本发明的子帧结构中,如果子帧中存在上、下行导频信道,下行 Less interference, in a subframe structure of the present invention, if the present subframe, the downlink pilot channel guide channel, downlink

导频时隙和上行导频时隙可以按若干个子帧数为周期间隔发送。 Pilot time slot and an uplink pilot time slot may transmit periodic intervals by a plurality of sub frames. 即:DwPTS 和UpPTS时隙中的信息可以在每个子帧中都发送,也可以按一定子帧数为周期间隔发送。 Namely: DwPTS and UpPTS time slot information may be both transmitted in each subframe may be transmitted to a certain number of subframes periodic intervals. 当DwPTS和UpPTS时隙的信息按一定子帧数为周期间隔发送时,两者可以在同一子帧中同时发送,也可以在不同的子帧中发送。 When the information DwPTS and UpPTS time slot by a certain number of subframes is transmitted at periodic intervals, both may be simultaneously transmitted in the same subframe, may be sent in different subframes. DwPTS 和UpPTS时隙信息发送的周期可以相同,也可以不同。 DwPTS and UpPTS timeslot period information transmitted may be the same or different.

在设定的子帧结构中,时隙TSO还是固定为下行时隙,时隙TS1还是固定为上行时隙。 In the subframe configuration in the set, or a fixed time slot is a downlink time slots TSO, TS1 or fixed time slots are uplink slots. 及设置相邻两个保护时隙间的最小时间间隔为2个业务时隙, 且一个子帧中最后一个保护时隙之后至少还有一个业务时隙。 At least one traffic time slot and disposed after the two neighboring protected interstitial minimum time interval of two service time slots, and a last subframe in a guard slot.

还有,在现有技术中下行导频时隙、保护时隙和上行导频时隙为相邻的时隙,在传输过程中上下行导频时隙之间存在着较强的干扰,为此,本发明改进的子帧结构中,可以将上下行导频时隙在位置上分开。 Further, in the prior art, a downlink pilot time slot, and guard time uplink pilot time slot adjacent to a time slot in the transmission process there is strong interference between uplink and downlink pilot time slot, as here, the present invention is an improved sub-frame structure, the upper and lower rows may be separated pilot time slot position. 比如将下行导频时隙(DwPTS)还是设置在TSO之后,上行导频时隙位于第K个保护时隙之后,M〉=K>1, M为每一子帧中保护时隙的个数。 For example, after the downlink pilot time slot (DwPTS) is set after the TSO, the uplink pilot time slot K located on the guard slots, M> = K> 1, M is the number of protection time slots in each subframe .

请参阅闺6,其为本发明改进的子帧的结构示例。 See Gui 6, the improved structure of the invention according to present exemplary subframe. 子帧一共包含了9个时隙和4个特殊时隙。 Sub-frame contains a total of nine slots and four special time slots. 4个特殊时隙为一个DwPTS、 一个UpPTS和两个转换保护时隙GP1和GP2。 4 is a special time slot DwPTS, UpPTS and a protection time slot GP1 two converters and GP2. 在该子帧中,如果TTI以一个时隙为长度,随着时隙的长度减少、保护时隙GP的增加,可以降低数据传输时延、提高系统容量。 In the subframe, if the TTI is one slot length, with the reduction in length of one slot, increasing the protection period GP, the data transmission delay can be reduced to improve the system capacity. 同时,由于增大了DwPTS和UpPTS时隙间隔,可以减少上下行同步的干扰。 Meanwhile, because of the increased spacing DwPTS and UpPTS timeslot, uplink and downlink interference can be reduced synchronization.

以上公开的仅为本发明的几个具体实施例,但本发明并非局限于此,任何本领域的技术人员能思之的变化,都应落在本发明的保护范围内。 While the invention has several specific embodiments disclosed above, but the present invention is not limited thereto, anyone skilled in the art can think of variations shall fall within the scope of the present invention.

Claims (12)

  1. 1、一种时分双工移动通信系统的通信方法,其特征在于,包括: (1)设置传输时间间隔TTI的最小单位和系统帧结构,每个无线子帧是由若干个业务时隙和包含至少两个转换保护时隙的特殊时隙组成,所述TTI是以所述无线子帧中的一个业务时隙为最小单位; (2)发送端将需要发送的数据按照步骤(1)设定的帧结构进行编码、调制后通过射频发送; (3)接收端接收射频信号先解调、然后按照步骤(1)设定的帧结构解码后获得对应的数据,随后按照步骤(1)设定的TTI返回接收应答消息,以便发送端发送下一数据包,进而完成数据传输。 1, a time division duplex communication method in a mobile communication system, characterized by comprising: (1) setting a transmission time interval TTI minimum unit and system frame structure, each wireless sub-frame is composed of a plurality of traffic slots and comprising converting the at least two slots protection special time slots, the service time slot of the TTI is a radio sub-frame is a minimum unit; data (2) to be transmitted by the transmitting end according to step (1) is set after the frame structure is encoded, modulated by a radio frequency transmission; (3) first signal receiver to receive a radio frequency demodulation, then follow the steps (1) to obtain a corresponding data set in the decoding frame structure, and then according to step (1) is set the TTI receive a response message returned to the sender sends the next packet, thereby completing the data transfer.
  2. 2、 如权利要求1所述的时分双工移动通信系统的通信方法,其特征在于, 步骤(1 )是根据系统对应答时间间隔时延的要求设定转换保护时隙的数目,所述数目M满足^》M22, N为每一子帧中业务时隙数目。 2. The communication method of claim 1, a time division duplex mobile communication system according to the claim number, wherein, in step (1) is protected by conversion of a set number of slots according to the requirements of the system response delay time interval, M satisfy ^ "M22, N is the number of traffic slots in each subframe.
  3. 3、 如权利要求1所述的时分双工移动通信系统的通信方法,其特征在于, 步骤(1)中设定的特殊时隙还包含一个上行导频时隙UpPTS和一个下行导频时隙DwPTS,设定的UpPTS和DwPTS以若干个子帧数为周期间隔发送, 或者步骤(1 )设定的特殊时隙还包含一个DwPTS,设定的DwPTS以若干个子帧数为周期间隔发送。 3. The communication method of claim 1, a time division duplex mobile communication system, characterized in that, in step (1) is set in the special time slot further comprises an uplink pilot time slot UpPTS and a downlink pilot time slot DwPTS, UpPTS and DwPTS in the set number of sub-frames is transmitted at periodic intervals, or the step (1) further comprises a special time slot set in a DwPTS, set to a plurality of sub frames DwPTS is transmitted at periodic intervals.
  4. 4、 如权利要求1或3所述的时分双工移动通信系统的通信方法,其特征在于,在步骤(1 )设定的子帧结构中,时隙TSO为下行时隙,时隙TS1为上行时隙,相邻两个转换保护时隙间的最小时间间隔为2个业务时隙,且一个子帧中最后一个转换保护时隙之后至少还有一个业务时隙,如果子帧中存在DwPTS,则该DwPTS位于时隙TS0之后,如果子帧中存在UpPTS,该UpPTS 位于第K个转换保护时隙之后,M》K〉1, M为每一子帧中转换保护时隙的个数。 4, a communication method as claimed in claim 13 time division duplex mobile communication system, characterized in that, in a subframe structure set in step (1), the time slots are downlink slots TSO, TS1 is the time slot uplink slot, when two adjacent protection minimum conversion time interval of two interstitial traffic slots, and a last subframe converter there is at least one traffic time slot after the slot is protected, if existing within the subframe DwPTS Thereafter, the time slot TS0, DwPTS is located, after UpPTS subframes if present, is located in the UpPTS time slot of the K protection conversion, M "K> 1, M is in each subframe the number of protection time slots of conversion.
  5. 5、 如权利要求1所述的时分双工移动通信系统的通信方法,其特征在于, 在步骤(1 )设定每个子帧中业务时隙的个数大于等于7。 5. The communication method of claim 1, a time division duplex mobile communication system, characterized in that, in step (1) setting the number of traffic slots in each subframe is 7 or greater.
  6. 6、 如4又利要求1所述的时分双工移动通信系统的通信方法, 步骤(2)之前还包括:发送端建立一个滑动发送窗口,需要发送的数据位于发送滑动窗口;步骤(3)还包括:若发送端在预先设定的时间内接收到接收端返回的接收应答消息,滑动窗口向前滑动,新进入滑动窗口的数据作为下一预发送的数据进行发送。 6. The communication method of claims 4 and a time division duplex mobile communication system according to claim 1, before step (2) further comprises: establishing a sending end a sliding transmission window, the transmission data to be transmitted is located in the sliding window; Step (3) further comprising: when the transmitting end receives the reception response message returned by the receiver within a predetermined time, the sliding window slides forward, the sliding window new incoming data transmitted as data of the next pre-transmitted.
  7. 7、 一种时分双工移动通信系统的通信方法,其特征在于,包括:(1 )设置传输时间间隔TTI的最小单位和系统帧结构,每个无线子帧是由若干个业务时隙和包含至少两个转换保护时隙的特殊时隙组成,所述TTI 是以所述无线子帧中一个的业务时隙为最小单位;(2) 用户终端先建立与网络侧的同步,然后通过接收TSO时隙,获得由网络侧发送的广播消息,进而得到其配置信息,所述配置信息包括步骤(1) 设定的TTI和系统帧信息;(3) 网络侧/用户终端向对端发送呼叫信息,对端按照步骤(1)设定的TTI进4亍呼叫应答;(4) 网络侧向用户终端分配信道资源,网络侧和用户终端通过所述被分配的信道资源建立通信。 7, a time division duplex communication method in a mobile communication system, characterized by comprising: (1) setting a transmission time interval TTI minimum unit and system frame structure, each wireless sub-frame is composed of a plurality of traffic slots and comprising converting the at least two special time slots protected slots, the TTI of the radio sub-frame is a minimum unit of traffic slots; (2) the user terminal to establish synchronization with the network side, and by receiving the TSO time slot, obtaining broadcast message sent by the network side, and thus obtain its configuration information, the configuration information comprises the step (1) TTI and system frame information is set; (3) the network side / user sending call information to the terminal end , the peer according to step (1) TTI which is set into the right foot call answering 4; (4) the network side allocating the channel resources to the terminal, the network side and the user terminal establishes a communication channel by the allocated resource.
  8. 8、 如权利要求7所述的时分双工移动通信系统的通信方法,其特征在于, 步骤(1)是根据系统对应答时间间隔时延的要求设定转换保护时隙的数目,所述数目M满足<formula>formula see original document page 3</formula> N为每一子帧中业务时隙数目。 8. The communication method of claim 7, a time division duplex mobile communication system according to the claim number, wherein, in step (1) is protected by conversion of a set number of slots according to the requirements of the system response delay time interval, satisfying M <formula> formula see original document page 3 </ formula> N is the number of traffic slots in each subframe.
  9. 9、 如权利要求7所述的时分双工移动通信系统的通信方法,其特征在于, 步骤(1)中设定的特殊时隙还包舍一个上行导频时隙UpPTS和一个下行导频时隙DwPTS,设定的UpPTS和DwPTS以若干个子帧数为周期间隔发送, 或者步骤(1 )设定的特殊时隙还包含一个DwPTS,没定的DwPTS以若千个子帧数为周期间隔发送。 9, the communication method as claimed in claim 7 in a time division duplex mobile communication system, characterized in that, in step (1) in the special time slot set in a further round uplink pilot time slot UpPTS and a downlink pilot slot DwPTS, UpPTS and DwPTS in the set number of sub-frames is transmitted at periodic intervals, or the step (1) further comprises a special time slot set in a DwPTS, if not given to one thousand sub-frames DwPTS is transmitted at periodic intervals.
  10. 10、 如权利要求7或9所述的时分双工移动通信系统的通信方法,其特征在于,在步骤(1)设定的子帧结构中,时隙TS0为下行时隙,时隙TS1 为上行时隙,相邻两个转换保护时隙间的最小时间间隔为2个业务时隙,且一个子帧中最后一个转换保护时隙之后至少还有一个业务时隙,如果存在上行导频时隙,则所述上行导频时隙位于第K个转换保护时隙之后,M ^K〉 1, M为每一子帧中转换保护时隙的个数。 10. The communication method of claim 7 or 9 division duplex mobile communication system according to claim, characterized in that the sub-frame structure in step (1) is set in a downlink time slot the time slot TS0, TS1 is the time slot uplink slot, when two adjacent protection minimum conversion time interval of two interstitial traffic slots, and a last subframe converter there is at least one traffic time slot after the guard time, if there is uplink pilot after the gap, the uplink pilot time slot is located on the K-th conversion guard slot, M ^ K> 1, M is in each subframe the number of protection time slots of conversion.
  11. 11、 如权利要求7或9所述的时分双工移动通信系统的通信方法,其特征在于,步骤(2)中如果子帧中存在下行导频时隙,用户终端通过接收下行导频时隙建立与网络侧的同步,否则将通过下行业务时隙上的信息建立与网络侧的同步。 11. The communication method of claim 7 or 9 division duplex mobile communication system according to claim, wherein, in step (2) in the downlink pilot time slot if there is a sub-frame, the user terminal by receiving a downlink pilot time slot establish synchronization with the network side, or the side to establish synchronization with the network by the information on the downlink traffic slot.
  12. 12、 如权利要求7所述的时分双工移动通信系统的通信方法,其特征在于,步骤(4)中网络侧和用户终端通过所述被分配的信道资源建立通信具体包括:发送端将需要发送的数据按照步骤(1 )设定的帧结构进行编码、调制后通过射频发送;接收端接收射频信号先解调、并按照步骤(1 )设定的帧结构解码后获得对应的数据包,然后按照步骤(1)设定的TTI单位返回接收应答消息,以便发送端发送下一数据,进而完成数据传输。 12. The communication method as claimed in claim 7 in a time division duplex mobile communication system, characterized in that, in step (4) the network side and the user terminal establishes a communication channel via the allocated resources comprises: transmitting end will need data transmitted according to step (1) setting a frame structure coding, by transmitting modulated radio frequency; RF receiver to receive the first signal demodulation, and follow the steps (1) after setting a frame structure obtained by decoding the corresponding data packet, then according to step (1) set in TTI units receive a response message returned to the sender sends the next data, thereby completing the data transfer.
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