CN101162987A - Method of transmitting uplink special time slot of TDD system - Google Patents

Method of transmitting uplink special time slot of TDD system Download PDF

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CN101162987A
CN101162987A CN 200710169977 CN200710169977A CN101162987A CN 101162987 A CN101162987 A CN 101162987A CN 200710169977 CN200710169977 CN 200710169977 CN 200710169977 A CN200710169977 A CN 200710169977A CN 101162987 A CN101162987 A CN 101162987A
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pilot
time slot
uplink
symbol
special time
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CN 200710169977
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Chinese (zh)
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CN101162987B (en )
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斌 喻
夏树强
博 戴
梁春丽
胡留军
郁光辉
鹏 郝
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中兴通讯股份有限公司
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Abstract

The invention discloses a transmission method of pilot signals in the uplink specific time slot of a time division duplex system, which is used in the TDD (Time Division Duplex) model of a LTE (Longtime Evolution) system. The method includes three steps. Firstly, a terminal transmits random access channels, uplink data and one or multiple pilot signals on the uplink specific time slot, and wherein, the terminal transmits the pilot signals on the last OFDM (Orthogonal Frequency Division Multiplexing) symbol; secondly, when the pilot signals on the last OFDM symbol are data demodulation pilots, if channel measurement pilots still need to be transmitted, then the channel measurement pilots are transmitted on other symbols; thirdly, when the pilot signals on the last OFDM symbol are channel measurement pilots, if the channel measurement pilots are not used for data demodulation, then data demodulation pilots are transmitted on the last but one symbol; different pilot signals are not on the same symbol. The application of the pilot transmission method put forward by the invention can ensure the performance of uplink pilot time slots and can be compatible with other transmission methods of uplink pilots.

Description

一种时分双工系统上行特殊时隙中导频信号的发送方法技术领域本发明涉及移动通信领域,特别是涉及一种时分双工系统上行特殊时隙中导频信号的发送方法。 A time division duplex system the uplink special time slot transmits a pilot signal TECHNICAL FIELD The present invention relates to the field of mobile communications, particularly to a method for transmitting an uplink special time slot time division duplex system the pilot signal. 背景技术目前LTE (长期演进)系统TDD (时分双工);溪型的帧结构,如图1 所示。 BACKGROUND ART LTE (Long Term Evolution) system, TDD (Time Division Duplex); Creek type frame structure shown in Figure 1. 在这种帧结构中, 一个10ms的无线帧被分成两个半帧,每个半帧中包括IO个长度为0.5ms的时隙(编号从0到9),每两个时隙组成一个长度为lms的子帧, 一个半帧中包含5个子帧(编号从0到4 )。 In this frame structure, a 10ms radio frame is divided into two half-frames, each half-frame comprises a length of 0.5ms IO slots (numbered from 0 to 9), each of two slots of length lms subframe of one half-frame includes 5 subframes (number from 0 to 4). 对于长度为5.21us 及4.69us的短循环前缀(Cyclic Prefix, CP), 一个时隙中包含7个长度为66.7us的上/下行符号,其中第一个符号的CP长度为5.21us,其余6个符号的CP长度为4.69us;对于长度为16.67us的长CP, —个时隙中包含6个上/下行符号。 For short cyclic prefix (Cyclic Prefix, CP) length of 5.21 us and 4.69us, one time slot contains 7 on a length of 66.7us / downlink symbols, wherein the CP length of the first symbol is 5.21 us, the remaining 6 CP length symbols is 4.69 us; for long CP length of 16.67us, - a time slot contains 6 uplink / downlink symbols. 另外,在这种帧结构中,子帧的配置特点为:(1) 子帧#0固定用于下行传输;(2) 子帧#1为特殊子帧,其中包含3个特殊时隙,分别是下行特殊时隙DwPTS (Downlink Pilot Time Slot)、保护间隔GP ( Guard Period)及上行特殊时隙UpPTS (Uplink Pilot Time Slot)。 Further, in this frame structure, the configuration characteristics of the subframe are as follows: (1) subframe # 0 for downlink transmission; (2) sub-frame # 1 is a special subframe, which contains three special time slots, respectively, It is a downlink special time slot DwPTS (downlink Pilot Time slot), a guard interval GP (Guard Period) and an uplink special time slot UpPTS (uplink Pilot Time slot). 其中:(21 ) DwPTS用于下行传输,其中最少一个下行OFDM (正交频分复用)符号用于传输主同步信号P-SCH (Primary-Synchronization CHannel), 当DwPTS中包含多个OFDM符号时,P-SCH放在第一个OFDM符号上(如图1所示);(22 ) GP为保护时间,不传输任何数据;(23 ) UpPTS用于上行传输,其中至少包含2个上行SC-FDMA (单载波频分复用)符号用于传输物理随机接入信道PRACH (Physical RandomAccess CHannel)。 When (21 is) DwPTS is used for downlink transmission, which at least one downlink OFDM (orthogonal frequency-division multiplexing) symbols used for transmitting primary synchronization signals P-SCH (Primary-Synchronization CHannel), when the DwPTS comprises a plurality of OFDM symbols: wherein , P-SCH on the first OFDM symbol (1); (22) GP is guard time, without transmitting any data; (23) UpPTS is used for uplink transmission, comprising at least two uplink SC- FDMA (single-carrier frequency division multiplexing) symbols for transmitting physical random access channel PRACH (physical RandomAccess cHannel). 当UpPTS包含的符号数大于2的时候,PRACH放在前两个符号上传输(如图1所示)。 When the number of symbols contained in the UpPTS is greater than 2, PRACH transmissions on the first two symbols (Figure 1). 在帧结构中,为了与TD-SCDMA (时分同步码分多址)系统共存,上行特殊时隙UpPTS中所包含的OFDM符号数量是可变,并且,至少包含2 个上行SC-FDMA符号用于传输PRACH,这就使得上行特殊时隙的结构与其他一般上行时隙的结构不一致。 In a frame structure, in order to coexist with the TD-SCDMA (Time Division Synchronous Code Division Multiple Access) system, an uplink special time slot UpPTS contained variable number of OFDM symbols, and comprising at least 2 uplink SC-FDMA symbols for transmission PRACH, which makes the structure of the uplink special time slot structure of uplink time slots and other general inconsistency. 发明内容本发明要解决的技术问题是提供一种时分双工系统上行特殊时隙中导频信号的发送方法。 SUMMARY OF THE INVENTION The present invention is to solve is to transmit the pilot signal to provide a method of time division duplex system the uplink special time slot in the guide. 本发明采用的技术方案是:一种时分双工系统上行特殊时隙中导频的发送方法,应用于LTE系统TDD模型中,包括以下步骤:终端在一上行特殊时隙上发送随机接入信道、上行数据和一个或多个导频信号,其中,所述终端在最后一个OFDM符号上发送导频信号;当所述最后一个OFDM符号上的导频信号为数据解调导频时,如果还要发送信道测量导频,则在其他符号上发送;当所述最后一个OFDM符号上的导频信号为信道测量导频时,如果信道测量导频不用作数据解调,则在倒数第二个符号上发送所述数据解调导频;不同的导频信号不在同一个符号上。 Aspect of the present invention is that: a time division duplex system the uplink special time slot transmission method of the pilot, applied to an LTE TDD system model, comprising the steps of: a terminal transmits a random access channel uplink special time slot on , uplink data and the one or more pilot signals, wherein the terminal transmits pilot signals on the last OFDM symbol; when the pilot signal on the last OFDM symbol for the data demodulation pilot, if it is to transmit the channel measurement pilot is transmitted on a different symbol; when pilot signals on the last OFDM symbol of a channel measurement pilot, if the channel measurement pilot is not used as data demodulation, the penultimate transmitting said data on the symbol demodulation pilot; different pilot signals not on the same symbol. 进一步地,所述终端还在所述上行特殊时隙的其它任意一个符号上发送所述第二数据解调导频。 Further, the terminal also any other symbol of the uplink special time slot of the second transmission data demodulation. 进一步地,当所述上行特殊时隙中包含的符号数小于等于m时,所述终端不发送所述第二数据解调导频;否则,所述终端在所述上行特殊时隙上发送所述第二个数据解调导频,其中,m=4, 5, 6。 Further, when the sign of the uplink special time slot contains less number m, the terminal does not transmit the second data demodulation; otherwise, the terminal transmits on the uplink special time slot said second data demodulation pilot, where, m = 4, 5, 6. 进一步地,当所述上行特殊时隙中包含的符号数大于m时,所述终端在所述上行特殊时隙的第3个符号上发送所述第二数据解调导频,其中, m=4, 5, 6。 Further, when the sign of the uplink special time slot number contained greater than m, said terminal transmitting on the uplink special time slot in the third symbol of the second pilot data demodulation, wherein, m = 4, 5, 6. 进一步地,所述上行特殊时隙中包含的符号数大于m且采用扩展循环 Further, the symbol of the uplink special time slot number contained in the extended cycle is greater than m and employing

前缀时,所述终端在所述上行特殊时隙的倒数第m个符号上发送所述第二数据解调导频,其中,m=5, 6。 Prefix, the reciprocal of the terminal on the uplink special time slot of the m-th transmitting the second data symbol demodulation, wherein, m = 5, 6. 进一步地,所述上行特殊时隙中包含的符号数大于m且采用常规循环前缀时,所述终端在所述上行特殊时隙的倒数第m+l个符号上发送所述第二数据解调导频,其中,m=5, 6。 Furthermore, when the symbols contained in the uplink special time slot number is greater than m and employing a normal cyclic prefix, the second terminal transmitting the data demodulation on the reciprocal of the uplink special time slot m + l symbols pilot, where, m = 5, 6. 同时也可以很好的与其他上行导频的发送方法兼容。 Also can be a good compatibility with other method for uplink pilot transmission. 附图说明图1为现有技术中TDD系统的帧结构示意图; 图2为实施例中一种上行导频时隙中导频的位置示意图; 图3为实施例中另一种上行导频时隙中导频的位置示意图; 图4为实施例中另一种上行导频时隙中导频的位置示意图。 Figure 1 is a schematic view of a frame structure in the TDD system in the prior art; FIG. 2 is a schematic diagram illustrating the position of one uplink pilot time slot of the pilot embodiment; FIG. 3 is another embodiment of the uplink pilot a schematic view of the position of the pilot slot; 4 is a schematic diagram of embodiments of another position of the uplink pilot time slot of the pilot FIG. 具体实施方式下面将结合附图及实施例对本发明的技术方案进行更详细的说明。 The technical solution of the present invention will be described in more detail below in conjunction with the accompanying drawings and specific embodiments embodiments. 一种时分双工系统上行特殊时隙中导频信号的发送方法,应用于LTE 系统TDD模型中,包括以下步骤:终端在一上行特殊时隙上发送随机接入信道、上行数据和一个或多个导频信号,其中,终端在最后一个OFDM符号上发送导频信号;当最后一个OFDM符号上的导频信号为数据解调导频时,如果还要发送信道测量导频,则在其他符号上发送;当最后一个OFDM 符号上的导频信号为信道测量导频时,如果信道测量导频不用作数据解调, 则在倒数第二个符号上发送数据解调导频;不同的导频信号不在同一个符号上。 A time division duplex system the uplink special time slot transmission method of the pilot signal, applied to an LTE TDD system model, comprising the steps of: a terminal transmits a random access channel uplink special time slot on the uplink data and one or more pilot signals, wherein the terminal transmits a pilot signal on the last OFDM symbol; when the pilot signal on the last OFDM symbol for the data demodulation pilot, even if the measurement pilot channel transmission, then the other symbols the transmission; when the pilot signal on the last OFDM symbols of a pilot channel measurement, if the measurement pilot channel is not used as data demodulation, the transmission data demodulation on the penultimate symbols; different pilot signals are not the same symbol. 终端还在上行特殊时隙的其它任意一个符号上发送第二数据解调导频或者当上行特殊时隙中包含的符号数小于等于m时,终端不发送第二数据解调导频;否则,终端在上行特殊时隙上发送第二个凄t据解调导频,发送方法包:fe以下三种方式: The second terminal also transmits an uplink data demodulation on a symbol to any other special time slot or an uplink special time slot when the symbols contained less number m, the terminal does not transmit the second data demodulation pilot; otherwise, the second terminal transmitting on the uplink special time slot desolate t demodulation pilot data, packet transmission method: Fe the following three ways:

第一张方式:当上行特殊时隙中包含的符号数大于m时,所述终端在所述上行特殊时隙的第3个符号上发送所述第二数据解调导频,其中,m=4, 5, 6。 First way: When a symbol contained in the uplink special time slot number is greater than m, said terminal transmitting on the uplink special time slot in the third symbol of the second pilot data demodulation, wherein, m = 4, 5, 6. 第二种方式:所述上行特殊时隙中包含的符号数大于m且采用扩展循环前缀时,所述终端在所述上行特殊时隙的倒数第m个符号上发送所述第二数据解调导频,其中,m=5, 6。 The second embodiment: when the number of symbols contained in the uplink special time slot is greater than m and the use of an extended cyclic prefix, the second terminal transmitting the data demodulation on the reciprocal of the uplink special time slot of the m-th symbol pilot, where, m = 5, 6. 第三种方式:所述上行特殊时隙中包含的符号数大于m且采用常规循环前缀时,所述终端在所述上行特殊时隙的倒数第m+l个符号上发送所述第二数据解调导频,其中,m=5, 6。 The third embodiment: the sign of the uplink special time slot number contained greater than m and employing a normal cyclic prefix, the second terminal transmits data on the reciprocal of the uplink special time slot m + l symbols demodulation pilot, where, m = 5, 6. 针对上述帧结构,终端在上行特殊时隙的最后一个OFDM符号上发送一个导频,该导频可以是数据解调导频,也可以是sounding (信道测量)导频;并且,当上行特殊时隙中包含的符号数多于2时,可以发送另一个数据解调导频,该导频可以在上行特殊时隙中固定的符号上发送,例如,当上行特殊时隙中所包含的符号数小于等于5时不发送第二数据解调导频,当上行特殊时隙中所包含的符号数大于5时,固定在第三个符号上发送第二数据解同改变,例如:当上行特殊时隙中所包含的符号数小于5时不发送第二数据解调导频,当上行特殊时隙中所包含的符号数大于5时,在常规循环前缀时, 倒数第六个符号上发送,在扩展循环前缀时,倒数第五个符号上发送。 For the above-described frame structure, the terminal transmits a pilot on the last OFDM symbol of the uplink special time slot, the pilot may be a data demodulation pilot, may be Sounding (measurement channel) pilot; and, when the uplink special when the number of symbols comprising more than 2 slot, can send another data demodulation pilot, the pilot symbols may be sent on a fixed uplink special time slot, for example, when the uplink special time slot symbols included in the number of 5 or less is not transmitted second data demodulation pilot, the uplink special time slot when the symbols contained in the number is greater than 5, a second data transmission with the fixing solution changes on the third symbol, for example: when the uplink special the number of symbols contained in the slot is not less than 5 when transmitting the second data demodulation pilot, when the number of symbols of the uplink special time slot contained greater than 5, when a normal cyclic prefix, the inverse of the sixth transmission symbols, in when extended cyclic prefix, the bottom fifth transmission symbols. 或者,在上行特殊时隙的数据解调导频也可以在倒数第二个OFDM符号上发送,sounding导频可以在最后一个OFDM符号上发送,也可以不发送sounding导频,第二数据解调导频可以在上行特殊时隙中固定的符号上发送,例如,当上行特殊时隙中所包含的符号数小于6时不发送第二数据解调导频,当上行特殊时隙中所包含的符号数大于6时,固定在第三个符号上发送第二数据解调导频;该第二数据解调导频也可以根据上行特殊时隙中所包含的符号数不同改变,例如:当上行特殊时隙中所包含的符号数小于6时不发送第二数据解调导频,当上行特殊时隙中所包含的符号数大于6时,在常规循环前缀时,倒数第七个符号上发送,在扩展循环前缀时,在倒数第六个符号上发送。 Alternatively, the data demodulation reference signal in the uplink special time slot may be sent on frequency penultimate OFDM symbols, sounding pilot may be sent on the last OFDM symbol may not be transmitted sounding pilot, a second data demodulator the pilot symbols may be sent on a fixed uplink special time slot, for example, when the sign uplink special time slot number contained in the second data transmission is not less than 6 pilot demodulation, when the uplink special time slot contained when the number of symbols is greater than 6, the transmission is fixed on the third symbol of the second pilot demodulated data; the second demodulation pilot data may be changed according to the number of different symbols included in the uplink special time slot, for example: when the uplink the number of symbols contained in the special time slot 6 is not less than the second data demodulation pilot transmission, the uplink special time slot when the symbols contained in the number is greater than 6, when a normal cyclic prefix, the reciprocal transmission symbols seventh when extended cyclic prefix, transmitting over the reciprocal of the sixth symbol.

下面用本发明的一应用实例进一步加以说明。 It is further illustrated by the following example of an application of the present invention. 附图2为一种帧结构中导频在上行特殊时隙中位置示意图。 A frame structure of Figure 2 is the position of the pilot in the uplink special time slot schematic. 其中,k为各符号的编号。 Wherein, k is the number of each symbol. 在该示意图中,描述了在连续12个子载波中导频的位置, 其中,上行特殊时隙所包含的OFDM符号数量为11个,数据解调导频或sounding导频固定在最后一个OFDM符号上发送,第二数据解调导频固定在倒数第六个OFDM符号上发送。 In this diagram, position 12 is described in a continuous pilot sub-carriers, wherein an uplink special time slot number included in an OFDM symbol is 11, data demodulation pilot or pilot sounding fixed on the last OFDM symbol transmitting the second data demodulation pilot transmission is fixed on the reciprocal sixth OFDM symbol. 附图3为另一种帧结构中导频在上行特殊时隙中位置示意图。 Figure 3 is a schematic diagram of uplink special time slot position in the frame structure in another pilot. 其中,k 为各符号的编号。 Wherein, k is the number of each symbol. 在该示意图中,描述了在连续12个子载波中导频的位置, 其中,上行特殊时隙所包含的OFDM符号数量为11个,数据解调导频固定在倒数第二个OFDM符号上发送,第二数据解调导频导频固定在倒数第七个OFDM符号上发送。 In this diagram, position 12 is described in a continuous pilot sub-carriers, wherein an uplink special time slot number included in an OFDM symbol is 11, fixed data demodulation pilot sent on the second last OFDM symbol, the second data demodulation pilot pilot sent on the reciprocal fixing the seventh OFDM symbol. 附图4为再一种帧结构中导频在上行特殊时隙中位置示意图。 Figure 4 is a schematic diagram of uplink special time slot position in the frame structure of still another pilot. 其中,k 为各符号的编号。 Wherein, k is the number of each symbol. 在该示意图中,描述了在连续12个子载波中导频的位置, 其中,上行特殊时隙所包含的OFDM符号数量为10个,数据解调导频或sounding导频固定在倒数第一个OFDM符号上发送,第二数据解调导频固定在倒数第六个OFDM符号上发送。 In this diagram, position 12 is described in a continuous pilot sub-carriers, wherein an uplink special time slot number included in an OFDM symbol is 10, data demodulation pilot or pilot sounding a fixed OFDM penultimate symbols transmitted on the second data demodulation pilot transmission is fixed on the reciprocal sixth OFDM symbol. 需要说明的是,导频的频域位置与相对应数据的频域位置一致,各用户导频之间采用频分的方式复用,用户多天线时各天线导频采用码分的方式复用。 Incidentally, the frequency domain pilot position coincides with the position corresponding to the frequency-domain data using the user between the pilot frequency division multiplexed manner, each of the antennas using the pilot code division manner when the user multi-antenna multiplexing . 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 is formed, these corresponding modifications and variations shall fall within the scope of the appended claims.

Claims (6)

  1. 1、一种时分双工系统上行特殊时隙中导频信号的发送方法,应用于LTE系统TDD模型中,其特征在于,包括以下步骤: 终端在一上行特殊时隙上发送随机接入信道、上行数据和一个或多个导频信号,其中,所述终端在最后一个OFDM符号上发送导频信号;当所述最后一个OFDM符号上的导频信号为数据解调导频时,如果还要发送信道测量导频,则在其他符号上发送;当所述最后一个OFDM符号上的导频信号为信道测量导频时,如果信道测量导频不用作数据解调,则在倒数第二个符号上发送所述数据解调导频;不同的导频信号不在同一个符号上。 1, a time division duplex system the uplink pilot signal transmission method in the special time slot guide, applied to an LTE TDD system model, characterized by comprising the steps of: a terminal transmitting an uplink random access channel on a particular time slot, the one or more uplink data and pilot signals, wherein the terminal transmits pilot signals on the last OFDM symbol; when the pilot signal on the last OFDM symbol for the data demodulation pilot, even if transmitting channel measurement pilot is transmitted on a different symbol; when pilot signals on the last OFDM symbol of a channel measurement pilot, if the channel measurement pilot is not used as data demodulation, the penultimate symbols transmitting data on the demodulation; different pilot signals not on the same symbol.
  2. 2、 如权利要求l所述的方法,其特征在于,所述终端还在所述上行特殊时隙的其它任意一个符号上发送所述第二数据解调导频。 2. A method according to claim l, characterized in that the terminal also on any other symbol of the uplink special time slot of the second transmission data demodulation.
  3. 3、 如权利要求l所述的方法,其特征在于,当所述上行特殊时隙中包含的符号数小于等于m时,所述终端不发送所述第二数据解调导频;否则,所述终端在所述上行特殊时隙上发送所述第二个数据解调导频,其中,m=4, 5, 6。 3. The method of claim l, wherein, when the sign of the uplink special time slot contains less number m, the terminal does not transmit the second data demodulation; otherwise, the the said terminal transmitting on the uplink special time slot in the second data demodulation pilot, where, m = 4, 5, 6.
  4. 4、 如权利要求3述的方法,其特征在于,当所述上行特殊时隙中包含的符号数大于m时,所述终端在所述上行特殊时隙的第3个符号上发送所述第二数据解调导频,其中,m=4, 5, 6。 4. The method described in claim 3, wherein, when the sign of the uplink special time slot number contained greater than m, the first terminal transmitting on the uplink special time slot of the three symbols second data demodulation pilot, where, m = 4, 5, 6.
  5. 5、 如权利要求3述的方法,其特征在于,所述上行特殊时隙中包含的符号数大于m且采用扩展循环前缀时,所述终端在所述上行特殊时隙的倒数第m个符号上发送所述第二数据解调导频,其中,m=5, 6。 5. The method described in claim 3, characterized in that the sign of the uplink special time slot number contained greater than m and the use of an extended cyclic prefix, the reciprocal of the terminal in the uplink special time slot of the m-th symbol transmitting the data demodulation on the second pilot, where, m = 5, 6.
  6. 6、 如权利要求3述的方法,其特征在于,所述上行特殊时隙中包含的符号数大于m且采用常规循环前缀时,所述终端在所述上行特殊时隙的倒数第m+l个符号上发送所述第二数据解调导频,其中,m=5, 6。 6, as described in claim 3, characterized in that the uplink special time slot symbol included number is greater than m and employing a normal cyclic prefix, the reciprocal of the uplink special time slot terminal of the m + l transmitting said second symbol on pilot data demodulation, wherein, m = 5, 6.
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