CN103765789B - Line initialization method, apparatus, and system - Google Patents
Line initialization method, apparatus, and system Download PDFInfo
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Abstract
本发明实施例提供了一种线路初始化方法,无论在上行方向还是下行方向,在没有获得系数矩阵(Cancellation系数矩阵和Precode系数矩阵)之前,都没有在对应方向上的数据符号位置上发送数据信息;CO先获取上行方向上所有线路上的传输信道,以消除在所有线路上行方向上数据传输时产生的串扰;这样就能在保证在建立上行的Error Sample的返回通道后,上行方向上没有串扰,就可以在CPE向CO发送的数据符号上承载下行方向上的串扰信道,CO就能根据CPE所反馈的下行方向上的串扰信道信息,计算出线路下行方向上的传输信道,从而获得下行预编码(Precode)系数矩阵来对下行方向的串扰进行消除;因此对CO和CPE间的业务没有影响,最大限度地降低新线加入对业务数据影响。
The embodiment of the present invention provides a line initialization method, no matter in the uplink direction or the downlink direction, before the coefficient matrix (Cancellation coefficient matrix and Precode coefficient matrix) is not obtained, no data information is sent at the position of the data symbol in the corresponding direction ; The CO first obtains the transmission channels on all lines in the uplink direction to eliminate the crosstalk generated during data transmission in the uplink direction of all lines; in this way, it can ensure that there is no crosstalk in the uplink direction after the return channel of the error sample in the uplink is established. , the crosstalk channel in the downlink direction can be carried on the data symbol sent by the CPE to the CO, and the CO can calculate the transmission channel in the downlink direction of the line according to the crosstalk channel information in the downlink direction fed back by the CPE, so as to obtain the downlink prediction Coding (Precode) coefficient matrix to eliminate crosstalk in the downlink direction; therefore, there is no impact on the business between the CO and CPE, and the impact of new lines on business data is minimized.
Description
技术领域technical field
本发明涉及数据通讯领域,具体地说,涉及一种线路初始化方法、装置和系统。The invention relates to the field of data communication, in particular to a line initialization method, device and system.
背景技术Background technique
数字用户线路(DSL,Digital Subscriber Line)是一种在电话双绞线上,例如无屏蔽双绞线(UTP,Unshielded Twist Pair),传输的高速数据传输技术。DSL系统中具有多路DSL线路,目前通常由DSL接入复用器(DSLAM,DigitalSubscriber Line Access Multiplexer)为多路DSL线路提供接入服务。但是,由于电磁感应原理,在接入DSLAM的多路信号之间会相互产生串扰(Crosstalk)。双绞线在高频的串扰很强,为了消除串扰,例如可以采用矢量化(Vectored)DSL技术来消除远端串扰。Digital Subscriber Line (DSL, Digital Subscriber Line) is a high-speed data transmission technology transmitted on twisted-pair telephone lines, such as UTP (Unshielded Twist Pair). There are multiple DSL lines in the DSL system. At present, a DSL access multiplexer (DSLAM, Digital Subscriber Line Access Multiplexer) usually provides access services for multiple DSL lines. However, due to the principle of electromagnetic induction, crosstalk (Crosstalk) will occur between the multiple signals connected to the DSLAM. Twisted pair cables have strong crosstalk at high frequencies. To eliminate crosstalk, for example, vectored (Vectored) DSL technology can be used to eliminate far-end crosstalk.
现有的Vectored DSL技术,主要利用在DSLAM端进行联合收发的特性,使用信号处理的方法来抵消FEXT的干扰。最终消除每一路信号中FEXT干扰。图1示出了在DSLAM端同步发送和同步接收的示意图。网络侧设备通过M条双绞线和M个用户侧设备(Customer premise Equipment,CPE)相连。The existing Vectored DSL technology mainly utilizes the characteristics of joint transmission and reception at the DSLAM end, and uses signal processing methods to offset FEXT interference. Ultimately eliminate FEXT interference in each signal. FIG. 1 shows a schematic diagram of synchronous transmission and synchronous reception at the DSLAM side. The network-side equipment is connected to M pieces of customer-side equipment (Customer premise Equipment, CPE) through M twisted-pair wires.
在下行或上行的共享信道H在频率域第k个子载波(tone)上可以表示为矩阵形式:The shared channel H in the downlink or uplink can be expressed as a matrix on the kth subcarrier (tone) in the frequency domain:
hij是表示线对j到线对i的传输方程,其中0≤i≤M,0≤j≤M。在实际情况下,i,j相等且等于Vectored DSL系统的线路数目,在这里设为M。那么H是一个M×M的信道传输矩阵。又分别设x是一个M×1的信道输入向量,y是一个M×1的信道输出向量,n是一个M×1的噪声向量。最终,信道传输方程表达为如下形式:h ij is the transmission equation representing line pair j to line pair i, where 0≤i≤M, 0≤j≤M. In actual situations, i and j are equal and equal to the number of lines of the Vectored DSL system, which is set to M here. Then H is a M×M channel transmission matrix. Let x be an M×1 channel input vector, y be an M×1 channel output vector, and n be an M×1 noise vector. Finally, the channel transmission equation is expressed in the following form:
y=Hx+ny=Hx+n
在上行信号传输过程中,在中心局(Central Office,CO)端,即网络侧设备做信号的联合接收处理,在接收端引入一个串音抵消器W,则接收到的信号为:In the process of uplink signal transmission, the central office (Central Office, CO) end, that is, the network side equipment, performs joint reception processing of the signal, and introduces a crosstalk canceller W at the receiving end, then the received signal is:
当WH为一个对角矩阵时,串音将得到消除。When WH is a diagonal matrix, crosstalk will be eliminated.
在下行信号传输过程中,在CO端做信号的联合发送处理,在CO端引入一个预编码器P,则发送的信号为:In the downlink signal transmission process, the joint transmission processing of the signal is performed at the CO end, and a precoder P is introduced at the CO end, and the transmitted signal is:
接收端接收到的信号为:The signal received by the receiver is:
当HP为一个对角阵时,串音将得到消除。When HP is a diagonal array, crosstalk will be eliminated.
综合得知,Vectored-DSL技术中的关键点是估计下行预编码矩阵P与上行抵消矩阵W。通过测量获得H,然后根据H和W,P的关系计算W和P。通过同步符号(Sync Symbol)同步,矢量化控制实体(Vectoring Control Entity,VCE)对所有线路统一分配导频序列(Pilot Sequence)。测量H需要发送的特殊DMT符号中就承载了正交导频序列(Vector pilot sequence),该特殊DMT符号也叫Vector训练符号,接收器通过接收这些Vector训练符号,并估计出串扰信道H,这个过程叫做Vector训练。It is known comprehensively that the key point in the Vectored-DSL technology is to estimate the downlink precoding matrix P and the uplink cancellation matrix W. Obtain H by measurement, and then calculate W and P according to the relationship between H and W, P. Through Sync Symbol synchronization, the Vectoring Control Entity (VCE) uniformly allocates pilot sequences (Pilot Sequence) to all lines. Orthogonal pilot sequence (Vector pilot sequence) is carried in the special DMT symbol that needs to be sent to measure H. This special DMT symbol is also called Vector training symbol. The receiver estimates the crosstalk channel H by receiving these Vector training symbols. The process is called Vector training.
当有新加入线初始化时,为了方便叙述如何获得H的,把线路之间的直接信道和串扰串扰信道的矩阵写成:
其中:HSS为处于showtime阶段(即数据发送阶段)线路到处于showtime阶段线路的串音子矩阵;showtime阶段指初始化和训练完成后所进入的数据发送阶段;Among them: HSS is the crosstalk sub-matrix from the line in the showtime stage (that is, the data transmission stage) to the line in the showtime stage; the showtime stage refers to the data transmission stage entered after the initialization and training are completed;
HSJ为初始化线路到处于showtime阶段线路的串音子矩阵;H SJ is the crosstalk sub-matrix from the initialization line to the line in the showtime stage;
HJS为处于showtime阶段线路到初始化线路的串音子矩阵;H JS is the crosstalk sub-matrix from the line in the showtime stage to the initialization line;
HJJ为初始化线路到初始化线路的串音子矩阵;H JJ is the crosstalk sub-matrix from initialization circuit to initialization circuit;
由于HJS和HJJ只有到了训练阶段上行的返回通道建立才能由VCE反馈给CO,而在新加入线初始化时,初始化线路还不具有反馈下行Error Sample的能力。一般情况下,在没有获取实际HJS和HJJ条件下,也可以根据使用线性预编码技术,直接使用公式
发明内容Contents of the invention
本发明实施例提供了一种线路初始化方法、装置和系统,用以最大限度地降低新线加入对业务数据影响。Embodiments of the present invention provide a line initialization method, device and system, which are used to minimize the impact of new line addition on service data.
第一方面,提供一种线路初始化方法,包括:In the first aspect, a line initialization method is provided, including:
CPE接收CO发送的O-P-SILENT信号或O-P-PILOT信号的超帧,其中所述O-P-SILENT信号或O-P-PILOT信号的超帧在下行方向的数据符号位置上没有信号,而在下行方向的同步符号位置上承载同步符号;所述下行方向的同步符号位置上承载的同步符号信息用于所述CPE计算出其他线路对所述CPE所在线路在下行方向上的串扰信道,即HJS;所述其他线路为其他CPE和所述CO连接的线路;The CPE receives the superframe of the OP-SILENT signal or OP-PILOT signal sent by the CO, wherein the superframe of the OP-SILENT signal or OP-PILOT signal has no signal at the position of the data symbol in the downlink direction, and the synchronization in the downlink direction The synchronization symbol is carried on the symbol position; the synchronization symbol information carried on the synchronization symbol position in the downlink direction is used for the CPE to calculate the crosstalk channel of other lines on the line where the CPE is located in the downlink direction, that is, H JS ; the other The line is a line connecting other CPEs to the CO;
所述CPE发送R-P-SILENT信号的超帧给所述CO,其中所述R-P-SILENT信号的超帧在上行方向的数据符号位置上没有任何信号,而上行方向的同步符号位置上承载同步符号;所述上行方向的同步符号位置上的同步符号信息用于计算上行方向上所有线路上的传输信道;所述上行方向上所有线路上的传输信道用于所述CO消除所有线路上在行方向上数据传输时产生的串扰;The CPE sends a superframe of the R-P-SILENT signal to the CO, wherein the superframe of the R-P-SILENT signal does not have any signal at the position of the data symbol in the uplink direction, and the position of the sync symbol in the uplink direction carries a synchronization symbol; The synchronization symbol information on the synchronization symbol position in the uplink direction is used to calculate the transmission channel on all lines in the uplink direction; the transmission channel on all lines in the uplink direction is used for the CO to eliminate data in the row direction on all lines Crosstalk generated during transmission;
所述CPE发送R-ERROR-SAMPLE信号的超帧给所述CO,其中所述R-ERROR-SAMPLE信号的超帧在上行方向的数据符号位置上承载数据信息,所述数据信息包括所述HJS。The CPE sends the superframe of the R-ERROR-SAMPLE signal to the CO, wherein the superframe of the R-ERROR-SAMPLE signal carries data information at the position of the data symbol in the uplink direction, and the data information includes the H JS .
在第一方面的第一种可能的实现方式中,所述CPE发送R-P-SILENT信号的阶段内构建的所有超帧在上行方向的数据符号位置上没有任何信号,而在上行方向的同步符号位置上承载同步符号。In the first possible implementation manner of the first aspect, all the superframes constructed during the period when the CPE sends the R-P-SILENT signal do not have any signal at the data symbol position in the uplink direction, and there is no signal at the sync symbol position in the uplink direction The synchronization symbol is carried on it.
结合第一方面或第一方面的第一种可能实现的方式,在第二种可能实现的方式中,在发送R-P-SILENT信号的超帧前,所述CPE发送R-P-QUIET信号的超帧给所述CO,但所述CPE发送R-P-QUIET信号的阶段内构建的所有超帧在上行方向的数据符号和同步符号位置上都不发送信号。In combination with the first aspect or the first possible implementation manner of the first aspect, in the second possible implementation manner, before sending the superframe of the R-P-SILENT signal, the CPE sends the superframe of the R-P-QUIET signal to The CO, but all superframes constructed during the period when the CPE sends the R-P-QUIET signal do not send signals at the positions of data symbols and synchronization symbols in the uplink direction.
结合第一方面、第一方面的第一种可能实现的方式、或第一方面的第二种可能实现的方式,在第三种可能实现的方式中,所述CPE发送R-ERROR-SAMPLE信号的阶段内构建的所有超帧在上行方向的数据符号位置上承载数据信息。In combination with the first aspect, the first possible implementation manner of the first aspect, or the second possible implementation manner of the first aspect, in the third possible implementation manner, the CPE sends the R-ERROR-SAMPLE signal All the superframes constructed in the stage of , carry data information at the data symbol positions in the uplink direction.
结合第一方面、第一方面的第一种可能实现的方式、第一方面的第二种可能实现的方式或第一方面的第三种可能实现的方式,在第四种可能实现的方式中,所述CPE接收到CO通过短消息携带的同步符号偏移量,根据所述同步符号偏移量,移动R-P-SILENT信号的超帧中的同步符号的发送位置,使得所述CPE所在线路上的同步符号和其他线路上的同步符号同时达到CO。Combining the first aspect, the first possible implementation of the first aspect, the second possible implementation of the first aspect, or the third possible implementation of the first aspect, in the fourth possible implementation , the CPE receives the synchronization symbol offset carried by the CO through the short message, and according to the synchronization symbol offset, moves the sending position of the synchronization symbol in the superframe of the R-P-SILENT signal, so that the CPE is on the line The sync symbol on the line arrives at the CO at the same time as the sync symbols on the other lines.
第二方面,提供一种线路初始化方法,所述线路为CO与多个CPE连接的多条线路,其中第(M+1)个CPE对应的第(M+1)条线路和其他M条线路形成串扰,M≥1;所述方法包括:In the second aspect, a line initialization method is provided, the lines are multiple lines connecting a CO to multiple CPEs, wherein the (M+1)th line corresponding to the (M+1)th CPE and other M lines Forming crosstalk, M≥1; the method includes:
所述CO发送O-P-SILENT信号或O-P-PILOT信号的超帧给所述第(M+1)条线路对应的所述第(M+1)个CPE,其中所述O-P-SILENT信号或O-P-PILOT信号的超帧在下行方向的数据符号位置上没有信号,而在下行方向的同步符号位置上承载有同步符号;所述下行方向的同步符号位置上的同步符号信息用于计算出在下行方向上所述M条线路对所述第(M+1)条线路的串扰信道,即HJS;The CO sends the superframe of the OP-SILENT signal or OP-PILOT signal to the (M+1)th CPE corresponding to the (M+1)th line, wherein the OP-SILENT signal or OP- The superframe of the PILOT signal has no signal at the data symbol position in the downlink direction, but carries a sync symbol at the sync symbol position in the downlink direction; the sync symbol information at the sync symbol position in the downlink direction is used to calculate the The crosstalk channel of the M lines to the (M+1)th line, that is, H JS ;
所述CO接收所述第(M+1)个CPE发送的R-P-SILENT信号的超帧,其中所述R-P-SILENT信号的超帧在上行方向的数据符号位置上没有任何信号,而上行方向的同步符号位置上承载同步符号;所述CO根据接收到的所述R-P-SILENT信号的超帧在同步符号位置上的同步符号信息计算上行方向上整个(M+1)条线路上的传输信道,所述上行方向上(M+1)条线路上的传输信道用于所述CO消除所有(M+1)条线路上在上行方向的数据传输时产生的串扰;The CO receives the superframe of the R-P-SILENT signal sent by the (M+1)th CPE, wherein the superframe of the R-P-SILENT signal has no signal at the position of the data symbol in the uplink direction, and the superframe of the R-P-SILENT signal in the uplink direction The synchronization symbol position carries the synchronization symbol; the CO calculates the transmission channels on the entire (M+1) lines in the uplink direction according to the received synchronization symbol information at the synchronization symbol position of the superframe of the R-P-SILENT signal, The transmission channels on the (M+1) lines in the uplink direction are used by the CO to eliminate crosstalk generated during data transmission in the uplink direction on all (M+1) lines;
所述CO接收第(M+1)个CPE发送的R-ERROR-SAMPLE信号的超帧,其中所述R-ERROR-SAMPLE信号的超帧在上行方向的数据符号位置上承载数据信息,所述数据信息包括所述HJS。The CO receives the superframe of the R-ERROR-SAMPLE signal sent by the (M+1)th CPE, wherein the superframe of the R-ERROR-SAMPLE signal carries data information at the position of the data symbol in the uplink direction, and the The data information includes the H JS .
在第二方面的第一种可能的实现方式中,所述CO根据所述第(M+1)个CPE反馈的HJS信息,计算出所述(M+1)条线路在下行方向上的传输信道。In the first possible implementation manner of the second aspect, the CO calculates the transmission of the (M+1) lines in the downlink direction according to the H JS information fed back by the (M+1)th CPE channel.
结合第二方面或第二方面的第一种可能实现的方式,在第二种可能实现的方式中,所述CO发送O-P-SILENT信号的阶段或发送O-P-PILOT信号的阶段内构建的所有超帧,在下行方向的数据符号位置上没有信号,而在下行方向的同步符号位置上发送同步符号。In combination with the second aspect or the first possible implementation manner of the second aspect, in the second possible implementation manner, all superstructures constructed during the stage when the CO sends the O-P-SILENT signal or the stage when the O-P-PILOT signal is sent In a frame, there is no signal at the position of the data symbol in the downlink direction, and a sync symbol is sent at the position of the sync symbol in the downlink direction.
结合第二方面、第二方面的第一种可能的实现方式、或第二方面的第二种可能实现的方式,在第三种可能实现的方式中,所述CO在第(M+1)条线路上发送的O-P-SILENT信号或O-P-PILOT信号的超帧中的同步符号与其他线路上超帧中的同步符号是同时发送的。In combination with the second aspect, the first possible implementation of the second aspect, or the second possible implementation of the second aspect, in the third possible implementation, the CO at the (M+1) The synchronization symbols in the superframe of the O-P-SILENT signal or O-P-PILOT signal sent on one line are sent simultaneously with the synchronization symbols in the superframe on other lines.
结合第二方面、第二方面的第一种可能的实现方式、第二方面的第二种可能实现的方式或第二方面的第三种可能实现的方式,在第四种可能实现的方式中,在所述CO接收所述第(M+1)个CPE发送的R-P-SILENT信号的超帧时,所述CO测量出所述第M条线路上的上行同步符号和所述M条的上行同步符号偏移量并发送给所述第(M+1)个CPE。In combination with the second aspect, the first possible implementation of the second aspect, the second possible implementation of the second aspect, or the third possible implementation of the second aspect, in the fourth possible implementation , when the CO receives the superframe of the R-P-SILENT signal sent by the (M+1)th CPE, the CO measures the uplink sync symbol on the Mth line and the uplink Synchronize the symbol offset and send it to the (M+1)th CPE.
第三方面,提供一种网络侧设备,所述网络侧设备至少通过第(M+1)条线路与第(M+1)个CPE相连;所述第(M+1)条线路和其他M条线路形成串扰,所述网络侧设备包括信号收发器、和上行传输信道处理单元;In the third aspect, a network side device is provided, the network side device is connected to the (M+1)th CPE through at least the (M+1)th line; the (M+1)th line and other M Lines form crosstalk, and the network side equipment includes a signal transceiver and an uplink transmission channel processing unit;
所述信号收发器发送O-P-SILENT信号或O-P-PILOT信号的超帧给所述第(M+1)个CPE,其中所述O-P-SILENT信号或O-P-PILOT信号的超帧在下行方向的数据符号位置上没有信号,而在下行方向的同步符号位置上承载有同步符号;The signal transceiver sends the superframe of the O-P-SILENT signal or the O-P-PILOT signal to the (M+1)th CPE, wherein the data in the superframe of the O-P-SILENT signal or the O-P-PILOT signal is in the downlink direction There is no signal at the symbol position, but a sync symbol is carried at the sync symbol position in the downlink direction;
所述信号收发器接收所述第(M+1)个CPE发送的R-P-SILENT信号的超帧,其中所述R-P-SILENT信号的超帧在上行方向的数据符号位置上没有任何信号,而上行方向的同步符号位置上承载同步符号;The signal transceiver receives the superframe of the R-P-SILENT signal sent by the (M+1)th CPE, wherein the superframe of the R-P-SILENT signal has no signal at the position of the data symbol in the uplink direction, and the uplink The sync symbol position in the direction carries the sync symbol;
所述上行传输信道处理单元根据接收到的所述R-P-SILENT信号的超帧中在同步符号位置上的同步符号信息计算上行方向上所有线路上的传输信道,并根据计算出的所述上行方向上(M+1)条线路上的传输信道消除所有(M+1)条线路上在上行方向的数据传输时产生的串扰;The uplink transmission channel processing unit calculates the transmission channels on all lines in the uplink direction according to the synchronization symbol information at the synchronization symbol position in the superframe of the received R-P-SILENT signal, and according to the calculated uplink direction The transmission channel on the upward (M+1) lines eliminates the crosstalk generated during data transmission in the uplink direction on all (M+1) lines;
所述信号收发器接收第(M+1)个CPE发送的R-ERROR-SAMPLE信号的超帧,其中所述R-ERROR-SAMPLE信号的超帧中在上行方向的数据符号位置上承载数据信息,所述数据信息包括下行方向的所述M条线路对第(M+1)条线路的串扰信道,即HJS。The signal transceiver receives the superframe of the R-ERROR-SAMPLE signal sent by the (M+1)th CPE, wherein the superframe of the R-ERROR-SAMPLE signal carries data information at the position of the data symbol in the uplink direction , the data information includes the crosstalk channel between the M lines in the downlink direction and the (M+1)th line, that is, H JS .
在第三方面的第一种可能的实现方式中,所述网络侧设备还包括下行传输信道处理单元,所述下行传输信道处理单元根据所述第(M+1)个CPE反馈的HJS信息,计算出所述(M+1)条线路在下行方向上的传输信道。In the first possible implementation manner of the third aspect, the network side device further includes a downlink transmission channel processing unit, and the downlink transmission channel processing unit is based on the H JS information fed back by the (M+1)th CPE , calculate the transmission channels of the (M+1) lines in the downlink direction.
结合第三方面、第三方面的第一种可能实现的方式,在第二种可能实现的方式中,所述信号收发器发送O-P-SILENT信号的阶段或发送O-P-PILOT信号的阶段内构建的所有超帧,在下行方向的数据符号位置上没有信号,而在下行方向的同步符号位置上发送同步符号。In combination with the third aspect and the first possible implementation manner of the third aspect, in the second possible implementation manner, the signal transceiver is constructed in the stage of sending the O-P-SILENT signal or the stage of sending the O-P-PILOT signal In all superframes, there is no signal at the position of the data symbol in the downlink direction, and a sync symbol is sent at the position of the sync symbol in the downlink direction.
结合第三方面、第三方面的第一种可能的实现方式、或第三方面的第二种可能实现的方式,在第三种可能实现的方式中,所述信号收发器在第(M+1)条线路上发送的O-P-SILENT信号或O-P-PILOT信号的超帧中的同步符号与其他线路上超帧中的同步符号是同时发送的。In combination with the third aspect, the first possible implementation of the third aspect, or the second possible implementation of the third aspect, in the third possible implementation, the signal transceiver at the (M+ 1) The synchronization symbols in the superframe of the O-P-SILENT signal or O-P-PILOT signal sent on one line are sent simultaneously with the synchronization symbols in the superframe on other lines.
结合第三方面、第三方面的第一种可能的实现方式、第三方面的第二种可能实现的方式或第三方面的第三种可能实现的方式,在第四种可能实现的方式中,所述网络侧设备还包括偏移量获取单元,所述偏移量获取单元在接收到R-P-SILENT信号的超帧时,计算该第(M+1)条线路上的上行同步符号和其他所述M条线路上的的上行同步符号偏移量,并将该偏移量通过所述信号收发器发送给所述第(M+1)个CPE。In combination with the third aspect, the first possible implementation of the third aspect, the second possible implementation of the third aspect, or the third possible implementation of the third aspect, in the fourth possible implementation , the network side device further includes an offset acquisition unit, and the offset acquisition unit calculates the uplink synchronization symbol and other Uplink synchronization symbol offsets on the M lines, and send the offsets to the (M+1)th CPE through the signal transceiver.
第四方面,提供一种用户侧设备,所述用户侧设备通过第(M+1)条线路与CO相连,所述第(M+1)条线路和与所述CO相连的其他M条线路形成串扰,所述用户侧设备包括信号收发器和下行传输信道计算单元;In the fourth aspect, a user-side device is provided, the user-side device is connected to the CO through the (M+1)th line, and the (M+1)th line is connected to other M lines connected to the CO forming crosstalk, the user side equipment includes a signal transceiver and a downlink transmission channel calculation unit;
所述信号收发器接收CO发送的O-P-SILENT信号或O-P-PILOT信号的超帧,其中所述O-P-SILENT信号或O-P-PILOT信号的超帧中在下行方向的数据符号位置上没有信号,而在下行方向的同步符号位置上承载有同步符号;所述下行传输信道计算单元根据所述下行方向的同步符号位置上的同步符号信息,计算出在下行方向上所述第(M+1)条线路对所述M条线路的串扰信道,即HJS;The signal transceiver receives the OP-SILENT signal or the superframe of the OP-PILOT signal sent by the CO, wherein there is no signal at the position of the data symbol in the downlink direction in the superframe of the OP-SILENT signal or the OP-PILOT signal, and A synchronization symbol is carried at the position of the synchronization symbol in the downlink direction; the downlink transmission channel calculation unit calculates the (M+1)th line in the downlink direction according to the synchronization symbol information at the position of the synchronization symbol in the downlink direction The crosstalk channel for the M lines, namely H JS ;
所述信号收发器发送R-P-SILENT信号的超帧给所述CO,其中所述R-P-SILENT信号的超帧在上行方向的数据符号位置上没有任何信号,而上行方向的同步符号位置上承载同步符号;所述上行方向的同步符号位置上的同步符号信息用于计算上行方向上整个(M+1)条线路上的传输信道;所述上行方向上整个(M+1)条线路上的传输信道用于消除在上行方向上数据传输时整个(M+1)条线路之间的串扰;The signal transceiver sends the superframe of the R-P-SILENT signal to the CO, wherein the superframe of the R-P-SILENT signal does not have any signal at the position of the data symbol in the uplink direction, and the position of the sync symbol in the uplink direction carries synchronization symbol; the synchronization symbol information at the synchronization symbol position in the uplink direction is used to calculate the transmission channel on the entire (M+1) lines in the uplink direction; the transmission on the entire (M+1) lines in the uplink direction The channel is used to eliminate crosstalk between the entire (M+1) lines during data transmission in the uplink direction;
所述信号收发器发送R-ERROR-SAMPLE信号的超帧给所述CO,其中所述R-ERROR-SAMPLE信号的超帧中在上行方向的数据符号位置上承载数据信息,所述数据信息包括所述HJS。The signal transceiver sends the superframe of the R-ERROR-SAMPLE signal to the CO, wherein the superframe of the R-ERROR-SAMPLE signal carries data information at the position of the data symbol in the uplink direction, and the data information includes The H JS .
在第四方面的第一种可能的实现方式中,所述信号收发器902发送R-P-SILENT信号的阶段内构建的所有超帧在上行方向的数据符号位置上没有任何信号,而上行方向的同步符号位置上承载同步符号。In the first possible implementation of the fourth aspect, all the superframes constructed during the period when the signal transceiver 902 sends the R-P-SILENT signal do not have any signal at the position of the data symbol in the uplink direction, and the synchronization in the uplink direction Symbol positions carry sync symbols.
结合第四方面、第四方面的第一种可能实现的方式,在第二种可能实现的方式中,所述信号收发器在发送R-P-SILENT信号的超帧前,发送R-P-QUIET信号的超帧给所述CO,但所述R-P-QUIET信号的超帧中在上行方向的数据符号和同步符号位置上都不发送信号。In combination with the fourth aspect and the first possible implementation manner of the fourth aspect, in the second possible implementation manner, the signal transceiver sends the superframe of the R-P-QUIET signal before the superframe of the R-P-SILENT signal The frame is sent to the CO, but no signal is sent at the position of the data symbol and the synchronization symbol in the uplink direction in the superframe of the R-P-QUIET signal.
结合第四方面、第四方面的第一种可能的实现方式、或第四方面的第二种可能实现的方式,在第三种可能实现的方式中,所述信号收发器902发送R-ERROR-SAMPLE信号的阶段内构建的所有超帧在上行方向的数据符号位置上承载数据信息。With reference to the fourth aspect, the first possible implementation of the fourth aspect, or the second possible implementation of the fourth aspect, in the third possible implementation, the signal transceiver 902 sends the R-ERROR All superframes constructed in the phase of the SAMPLE signal carry data information at the data symbol position in the uplink direction.
结合第四方面、第四方面的第一种可能的实现方式、第四方面的第二种可能实现的方式或第四方面的第三种可能实现的方式,在第四种可能实现的方式中,所述用户侧设备还包括偏移量获取单元,所述偏移量获取单元接收到CO通过短消息携带的同步符号偏移量,根据所述同步符号偏移量,移动R-P-SILENT信号的超帧中的同步符号的发送位置,使得第(M+1)条线路上同步符号和其他所述M条线路上的同步符号同时达到CO。Combining the fourth aspect, the first possible implementation of the fourth aspect, the second possible implementation of the fourth aspect, or the third possible implementation of the fourth aspect, in the fourth possible implementation , the user side equipment further includes an offset acquisition unit, the offset acquisition unit receives the synchronization symbol offset carried by the CO through the short message, and according to the synchronization symbol offset, moves the R-P-SILENT signal The sending position of the synchronization symbol in the superframe is such that the synchronization symbol on the (M+1)th line and the synchronization symbols on the other M lines reach the CO at the same time.
第五方面,提供一种网络系统,所述系统包括上述的网络侧设备和多个上述的用户侧设备,所述网络侧设备通过多条线路分别所述多个用户侧设相连接。According to a fifth aspect, a network system is provided, the system includes the above-mentioned network-side device and a plurality of the above-mentioned user-side devices, and the network-side device is connected to each of the multiple user-side devices through multiple lines.
利用本实施例,利用本实施例,先获取上行方向上所有线路上的传输信道,以消除在所有线路上行方向上数据传输时产生的串扰;这样就能在保证在建立上行的Error Sample的返回通道后,上行方向上没有串扰,就可以在CPE向CO发送的数据符号上承载下行方向上的串扰信道,CO就能根据CPE所反馈的下行方向上的串扰信道信息,计算出线路下行方向上的传输信道,从而获得下行预编码(Precode)系数矩阵来对下行方向的串扰进行消除。而在这过程中无论是上行方向还是下行方向,在没有获得系数矩阵(Cancellation系数矩阵和Precode系数矩阵)之前,都没有在对应方向上的数据符号位置上发送数据信息。因此对CO和CPE间业务没有影响,最大限度地降低新线加入对业务数据影响。Utilize this embodiment, utilize this embodiment, first obtain the transmission channel on all lines on the uplink direction, to eliminate the crosstalk that produces when data transmission on the uplink direction of all lines; After channeling, if there is no crosstalk in the uplink direction, the data symbols sent by the CPE to the CO can bear the crosstalk channel in the downlink direction. The transmission channel, so as to obtain the downlink precoding (Precode) coefficient matrix to eliminate the crosstalk in the downlink direction. In this process, whether it is the uplink direction or the downlink direction, no data information is sent at the data symbol position in the corresponding direction before the coefficient matrix (Cancellation coefficient matrix and Precode coefficient matrix) is obtained. Therefore, there is no impact on the service between the CO and the CPE, and the impact of new lines on service data is minimized.
附图说明Description of drawings
图1为DSL架构中DSLAM同步发送和同步接收的示意图;Fig. 1 is a schematic diagram of DSLAM synchronous transmission and synchronous reception in the DSL architecture;
图2为DSL线路上传输信号的TDD帧结构;Fig. 2 is the TDD frame structure of the transmission signal on the DSL line;
图3为DSL线路上传输信号的超帧结构;Fig. 3 is the superframe structure of the transmission signal on the DSL line;
图4为本发明实施例的一种线路初始化方法流程图;FIG. 4 is a flow chart of a line initialization method according to an embodiment of the present invention;
图5为本发明实施例的另一种线路初始化方法流程图;FIG. 5 is a flowchart of another line initialization method according to an embodiment of the present invention;
图6为本发明实施例的CO和CPE信号发送阶段图;FIG. 6 is a CO and CPE signal transmission phase diagram of an embodiment of the present invention;
图7为本发明实施例的另一种线路初始化方法流程图;FIG. 7 is a flowchart of another line initialization method according to an embodiment of the present invention;
图8为本发明实施例的一种网络侧设备结构示意图;FIG. 8 is a schematic structural diagram of a network side device according to an embodiment of the present invention;
图9为本发明实施例的一种用户侧设备结构示意图;FIG. 9 is a schematic structural diagram of a user-side device according to an embodiment of the present invention;
图10为本发明实施例的一种系统组成示意图;FIG. 10 is a schematic diagram of a system composition according to an embodiment of the present invention;
图11为本发明实施例的一种网络部件结构示意图。Fig. 11 is a schematic structural diagram of a network component according to an embodiment of the present invention.
具体实施方式Detailed ways
为使本发明实施例的目的、技术方案和优点更加清楚,下面将结合本发明实施例中的附图,对本发明实施例中的技术方案进行清楚、完整地描述,显然,所描述的实施例是本发明一部分实施例,而不是全部的实施例。基于本发明中的实施例,本领域普通技术人员在没有作出创造性劳动前提下所获得的所有其他实施例,都属于本发明保护的范围。In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments It is a part of embodiments of the present invention, but not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.
在图1所示的DSL架构中,网络侧设备(CO)和每个用户侧设备(CustomerPremise Equipment,CPE)都包含发送单元(Tx)和接收单元(Rx);在FTTD(Fiber To The Distribution point)的部署场景下,网络侧设备CO的功能会迁移到分配点(distribution point,DP)。DP点到达用户家的多个CPE的多条线路上,处于Showtime阶段时线路中信号的传输采用图2和3所示的TDD(TimeDivision Duple,时分双工)帧结构和超帧结构。其中每个TDD帧定义了上下行发送和接收数据符号(Data Symbol)的时隙,每个超帧中下行发送方向的第一个DMT(Discrete Multi-Tone,离散多音频)符号就是下行发送方向的同步符号(Sync Symbol),上行发送方向的第一个DMT符号就是上行发送方向的同步符号。例如,一个TDD帧的可以由36个DMT组成,那么TF等于36个DMT;一个超帧可以由8个TDD帧组成;该超帧中的第一个TDD帧的第一个DMT符号就是下行发送方向的同步符号,如果一个TDD帧的持续时间长度大约0.75毫秒,一个超帧的持续时间长度大约为6毫秒。In the DSL architecture shown in Figure 1, the network-side equipment (CO) and each customer-side equipment (CustomerPremise Equipment, CPE) include a sending unit (Tx) and a receiving unit (Rx); in FTTD (Fiber To The Distribution point ) deployment scenario, the function of the CO on the network side will be migrated to the distribution point (DP). The DP point reaches multiple lines of multiple CPEs in the user's home. During the Showtime phase, the signal transmission on the lines adopts the TDD (Time Division Duple, time division duplex) frame structure and superframe structure shown in Figures 2 and 3. Each TDD frame defines the time slot for sending and receiving data symbols (Data Symbol) in the uplink and downlink, and the first DMT (Discrete Multi-Tone, discrete multi-tone) symbol in the downlink sending direction in each superframe is the downlink sending direction The synchronization symbol (Sync Symbol), the first DMT symbol in the uplink transmission direction is the synchronization symbol in the uplink transmission direction. For example, a TDD frame can be composed of 36 DMTs, then TF is equal to 36 DMTs; a superframe can be composed of 8 TDD frames; the first DMT symbol of the first TDD frame in the superframe is the downlink transmission The synchronous symbol of direction, if the duration of a TDD frame is about 0.75 milliseconds, the duration of a superframe is about 6 milliseconds.
本发明实施例中,线路初始化阶段采用与showtime阶段相同的TDD帧结构和超帧结构,并且Vector训练信号只能在超帧结构的同步符号中发送。同步符号一般由多个音频(tone)组成,一般大约有2048个tone,可以发送包括矢量化训练的序列(Vector pilot sequence),时钟恢复导频(timing recovery),同步标识(Sync Flag),短消息(short message,短消息一般只有几个字节消息)等。比如,同步符号的奇数位置tone用于Vector训练的tone,偶数位置的tone用于发送同步标识,时钟恢复导频,短消息;更具体地,偶数tone的索引个位数为0,4,8的用于发送短消息,偶数tone的索引个位数为2,6的用于发送同步标识,例外的,在其中选出两三个tone用于发送时钟恢复导频。In the embodiment of the present invention, the line initialization stage adopts the same TDD frame structure and superframe structure as the showtime stage, and the Vector training signal can only be sent in the synchronization symbols of the superframe structure. Synchronous symbols are generally composed of multiple audio tones, generally about 2048 tones, and can send vector pilot sequences (Vector pilot sequences), clock recovery pilots (timing recovery), synchronization flags (Sync Flag), short Message (short message, short message generally only has a few bytes of message), etc. For example, the odd-numbered tone of the synchronization symbol is used for the tone of Vector training, and the even-numbered tone is used to send the synchronization mark, the clock recovery pilot, and the short message; more specifically, the index unit digits of the even-numbered tone are 0, 4, and 8 It is used to send short messages, and the even tone whose unit digit of the index is 2,6 is used to send the synchronization identifier. In the exception, two or three tones are selected for sending the clock recovery pilot.
本发明实施例提供一种线路初始化方法,如图4所述,该方法包括:An embodiment of the present invention provides a line initialization method, as shown in FIG. 4, the method includes:
步骤401:CPE接收CO发送的O-P-SILENT信号(局端收发器沉默信号)或O-P-PILOT信号(局端收发器发射引导信号)的超帧,其中所述O-P-SILENT信号或O-P-PILOT信号的超帧在下行方向的数据符号位置上没有信号,而在下行方向的同步符号位置上承载同步符号;所述下行方向的同步符号位置上承载的同步符号信息用于所述CPE计算出除所述CPE所在的线路以外的其他线路对所述CPE所在线路在下行方向上的串扰信道,即HJS;所述其他线路为其他CPE和所述CO连接的线路;Step 401: The CPE receives the superframe of the OP-SILENT signal (the silence signal of the central office transceiver) or the OP-PILOT signal (the pilot signal transmitted by the central office transceiver) sent by the CO, wherein the OP-SILENT signal or the OP-PILOT signal The superframe has no signal at the position of the data symbol in the downlink direction, and carries a sync symbol at the position of the sync symbol in the downlink direction; the sync symbol information carried at the position of the sync symbol in the downlink direction is used for the CPE to calculate the The crosstalk channel of other lines other than the line where the CPE is located to the line where the CPE is located in the downlink direction, that is, HJS ; the other lines are lines connected to other CPEs and the CO;
步骤403:所述CPE发送R-P-SILENT信号(远端收发器沉默信号)的超帧给所述CO,其中所述R-P-SILENT信号的超帧在上行方向的数据符号位置上没有任何信号,而上行方向的同步符号位置上承载同步符号;所述上行方向的同步符号位置上的同步符号信息用于计算上行方向上所有线路上的传输信道;所述上行方向上所有线路上的传输信道用于所述CO消除所有线路上在上行方向的数据传输时产生的串扰;Step 403: The CPE sends a superframe of the R-P-SILENT signal (remote transceiver silence signal) to the CO, wherein the superframe of the R-P-SILENT signal has no signal at the position of the data symbol in the uplink direction, and Synchronization symbols are carried on the synchronization symbol positions in the uplink direction; the synchronization symbol information on the synchronization symbol positions in the uplink direction is used to calculate the transmission channels on all lines in the uplink direction; the transmission channels on all lines in the uplink direction are used for The CO eliminates crosstalk generated during data transmission in the uplink direction on all lines;
步骤405:所述CPE发送R-ERROR-SAMPLE信号(远端收发器反馈错误图样信号)的超帧给所述CO,其中所述R-ERROR-SAMPLE信号的超帧在上行方向的数据符号位置上承载数据信息,所述数据信息包括所述HJS。Step 405: The CPE sends the superframe of the R-ERROR-SAMPLE signal (remote transceiver feedback error pattern signal) to the CO, wherein the superframe of the R-ERROR-SAMPLE signal is at the data symbol position in the uplink direction The upper bears data information, and the data information includes the H JS .
需要说明的是步骤401和步骤403没有先后顺序,CPE发送R-P-SILENT信号的超帧给CO可以在CPE接收CO发送的O-P-SILENT信号或O-P-PILOT信号的超帧之前或者之后进行;类似地,后续实施例中,CO发送的O-P-SILENT信号或O-P-PILOT信号的超帧也可以是在CO接收到CPE发送R-P-SILENT信号的超帧之前或之后进行,在此进行统一说明。It should be noted that step 401 and step 403 are not sequential, and the CPE can send the superframe of the R-P-SILENT signal to the CO before or after the CPE receives the superframe of the O-P-SILENT signal or O-P-PILOT signal sent by the CO; similarly , in subsequent embodiments, the superframe of the O-P-SILENT signal or O-P-PILOT signal sent by the CO may also be performed before or after the CO receives the superframe of the R-P-SILENT signal sent by the CPE, which will be described uniformly here.
利用本实施例,先获取上行方向上所有线路上的传输信道,以消除在所有线路上行方向上数据传输时产生的串扰;这样就能在保证在建立上行的Error Sample的返回通道后,上行方向上没有串扰,就可以在CPE向CO发送的数据符号上承载下行方向上的串扰信道,CO就能根据CPE所反馈的下行方向上的串扰信道信息,计算出线路下行方向上的传输信道,从而获得下行预编码(Precode)系数矩阵来对下行方向的串扰进行消除。而在这过程中无论是上行方向还是下行方向,在没有获得系数矩阵(Cancellation系数矩阵和Precode系数矩阵)之前,都没有在对应方向上的数据符号位置上发送数据信息。因此对CO和CPE间业务没有影响,最大限度地降低新线加入对业务数据影响。Utilize this embodiment, first acquire the transmission channels on all lines in the uplink direction, to eliminate the crosstalk generated during data transmission in the uplink direction of all lines; If there is no crosstalk in the upward direction, the data symbols sent by the CPE to the CO can bear the crosstalk channel in the downlink direction, and the CO can calculate the transmission channel in the downlink direction of the line according to the crosstalk channel information in the downlink direction fed back by the CPE, thus A downlink precoding (Precode) coefficient matrix is obtained to eliminate crosstalk in the downlink direction. In this process, whether it is the uplink direction or the downlink direction, no data information is sent at the data symbol position in the corresponding direction before the coefficient matrix (Cancellation coefficient matrix and Precode coefficient matrix) is obtained. Therefore, there is no impact on the service between the CO and the CPE, and the impact of new lines on service data is minimized.
下面结合具体场景,本发明实施例提供另一种线路初始化方法,所述线路为CO与多个CPE连接的线路。在该场景中,多个CPE通过多条线路与CO或Dp点相连接,其中M条线路已经进入showtime阶段,第(M+1)个CPE对应的第(M+1)条线路新加入时,即进入信道发现(Channel-discovery)阶段后,其中第(M+1)个CPE对应的第(M+1)条线路和其他M条线路形成串扰;从第(M+1)个CPE侧进行描述,其他M个CPE统称为其他CPE;所述M≥1;所述方法如图5所示,包括:In the following, in combination with specific scenarios, an embodiment of the present invention provides another method for initializing a line, where the line is a line connecting a CO to multiple CPEs. In this scenario, multiple CPEs are connected to CO or Dp through multiple lines, among which M lines have entered the showtime stage, and when the (M+1)th line corresponding to the (M+1)th CPE is newly added , that is, after entering the channel discovery (Channel-discovery) stage, the (M+1)th line corresponding to the (M+1)th CPE forms crosstalk with other M lines; from the (M+1)th CPE side For description, the other M CPEs are collectively referred to as other CPEs; the M≥1; the method is shown in Figure 5, including:
步骤501:所述第(M+1)个CPE接收所述CO发送的O-P-SILENT信号或O-P-PILOT信号的超帧,如图6所示,其中所述O-P-SILENT信号或O-P-PILOT信号的超帧在下行方向的数据符号位置上没有信号,而在下行方向的同步符号位置上承载同步符号;根据所述O-P-SILENT信号或O-P-PILOT信号的超帧在下行方向的同步符号位置上的同步符号信息,计算出在下行方向上所述第(M+1)条线路对处于showtime阶段的所述M条线路的串扰信道,即HJS。Step 501: The (M+1)th CPE receives the superframe of the OP-SILENT signal or OP-PILOT signal sent by the CO, as shown in Figure 6, wherein the OP-SILENT signal or OP-PILOT signal The superframe has no signal on the data symbol position of the downlink direction, and carries the synchronization symbol on the synchronization symbol position of the downlink direction; according to the superframe of the OP-SILENT signal or OP-PILOT signal, on the synchronization symbol position of the downlink direction The synchronous symbol information, calculate the crosstalk channel of the (M+1)th line in the downlink direction to the M lines in the showtime phase, that is H JS .
进一步地,所述CO发送O-P-SILENT信号的阶段或发送O-P-PILOT信号的阶段内构建的所有超帧,在下行方向的数据符号位置上没有信号,而在下行方向的同步符号位置上发送同步符号。Further, in all the superframes constructed in the phase of the CO sending the O-P-SILENT signal or the phase of sending the O-P-PILOT signal, there is no signal at the position of the data symbol in the downlink direction, and a synchronization symbol is sent at the position of the synchronization symbol in the downlink direction symbol.
由于O-P-SILENT信号或O-P-PILOT信号的超帧在同步符号上发送的同步符号信息包含Vector导频序列,CPE接收到该O-P-SILENT信号的超帧后,就可以计算出在下行方向上新加入线即上述第(M+1)条线路对处于showtime阶段的M条线路的串扰信道。根据Vector导频序列来得到线路串扰信道的计算方式是现有技术,这里不进行深入描述。Since the synchronization symbol information sent on the synchronization symbol of the O-P-SILENT signal or the superframe of the O-P-PILOT signal contains the Vector pilot sequence, after receiving the superframe of the O-P-SILENT signal, the CPE can calculate the newly added The line is the crosstalk channel of the above (M+1)th line to the M lines in the showtime stage. The calculation method of obtaining the line crosstalk channel according to the Vector pilot sequence is the prior art, and will not be described in depth here.
需要说明的是,所述信道发现阶段ITU-T标准G.994.1中规定的握手阶段(Handshake)过程后的信道发现阶段,信道发现阶段包括了几个信号阶段,例如发送O-P-PILOT信号的阶段(也称为O-P-PILOT信号阶段)就是其中之一,O-P-PILOT信号阶段的超帧主要发送O-P-PILOT信号,在特殊的位置还可能发送特殊的符号,例如超帧开始时发送同步符号。It should be noted that the channel discovery stage is the channel discovery stage after the handshake stage (Handshake) process specified in the ITU-T standard G.994.1. The channel discovery stage includes several signal stages, such as the stage of sending the O-P-PILOT signal (also known as the O-P-PILOT signal phase) is one of them. The superframe of the O-P-PILOT signal phase mainly sends the O-P-PILOT signal, and may also send special symbols in special positions, such as sending synchronization symbols at the beginning of the superframe.
步骤503:所述第(M+1)个CPE发送R-P-SILENT信号的超帧给所述CO,其中所述R-P-SILENT信号的超帧在上行方向的数据符号位置上没有任何信号,而上行方向的同步符号位置上承载同步符号;所述上行方向的同步符号位置上的同步符号信息用于计算上行方向上整个(M+1)条线路上的传输信道;所述上行方向上整个(M+1)条线路上的传输信道用于消除在上行方向上数据传输时整个(M+1)条线路之间的串扰。Step 503: The (M+1)th CPE sends a superframe of the R-P-SILENT signal to the CO, wherein the superframe of the R-P-SILENT signal has no signal at the position of the data symbol in the uplink direction, and the uplink Synchronization symbols are carried on the synchronization symbol positions in the uplink direction; the synchronization symbol information on the synchronization symbol positions in the uplink direction is used to calculate the transmission channels on the entire (M+1) lines in the uplink direction; the entire (M The transmission channel on +1) lines is used to eliminate crosstalk between the entire (M+1) lines during data transmission in the uplink direction.
进一步地,所述第(M+1)个CPE发送R-P-SILENT信号的阶段内构建的所有超帧在上行方向的数据符号位置上没有任何信号,而上行方向的同步符号位置上承载同步符号。Further, all superframes constructed during the period when the (M+1)th CPE sends the R-P-SILENT signal do not have any signal at the position of the data symbol in the uplink direction, while the position of the sync symbol in the uplink direction carries a synchronization symbol.
由于所述CPE发送的R-P-SILENT信号的超帧在同步符号位置上的同步符号信息包含Vector导频序列,CO接收到该R-P-SILENT信号的超帧后,就可以计算出上行方向上处于showtime阶段的M条线路对新加入线即上述第(M+1)条线路的串扰信道。Since the synchronization symbol information in the synchronization symbol position of the superframe of the R-P-SILENT signal sent by the CPE contains the Vector pilot sequence, after the CO receives the superframe of the R-P-SILENT signal, it can calculate that the showtime in the uplink direction is The crosstalk channel of the M lines in the stage to the newly added line, that is, the (M+1)th line above.
而在上行方向上,新加入线对处于showtime阶段的M条线路的串扰信道可以通过其他线路上的CPE反馈获得,处于showtime阶段的M条线路自己对自己的串扰信道,以及新加入线自己对自己的串扰信道都容易获取;那么CO在上述测量出上行方向上新加入线对处于showtime阶段的M条线路的串扰信道后,就能得到上行方向上整个(M+1)条线路上的传输信道,进而消除上行方向上的串扰。In the uplink direction, the crosstalk channel of the M lines in the showtime phase of the newly added line can be obtained through the CPE feedback on other lines, the crosstalk channel of the M lines in the showtime phase to itself, and the newly added line's own pair It is easy to obtain its own crosstalk channels; then the CO can obtain the transmission on the entire (M+1) lines in the uplink direction after measuring the crosstalk channels of the M lines newly added to the line pair in the showtime stage in the uplink direction. channel, thereby eliminating crosstalk in the uplink direction.
由于按照G.994.1规定的handshake过程,在发送的R-P-SILENT信号的超帧前,需要发送R-P-QUIET信号(远端收发器寂静信号)的超帧;所以,进一步,本步骤还包括步骤503-1(附图中没有标示):在发送R-P-SILENT信号的超帧前,所述第(M+1)个CPE发送R-P-QUIET信号的超帧给所述CO,但所述(M+1)CPE发送R-P-QUIET信号的阶段内构建的所有超帧在上行方向的数据符号和同步符号位置上都不发送信号;即所述R-P-QUIET信号的超帧相当于空帧。According to the handshake process specified in G.994.1, before the superframe of the sent R-P-SILENT signal, it is necessary to send the superframe of the R-P-QUIET signal (quiet signal of the remote transceiver); so, further, this step also includes step 503 -1 (not marked in the figure): Before sending the superframe of the R-P-SILENT signal, the (M+1)th CPE sends the superframe of the R-P-QUIET signal to the CO, but the (M+ 1) All superframes constructed during the period when the CPE sends the R-P-QUIET signal do not send signals at the positions of data symbols and synchronization symbols in the uplink direction; that is, the superframe of the R-P-QUIET signal is equivalent to an empty frame.
步骤505:所述第(M+1)个CPE发送R-ERROR-SAMPLE信号的超帧给所述CO,其中所述R-ERROR-SAMPLE信号的超帧在上行方向的数据符号位置上承载数据信息,所述数据信息包括下行方向的处于showtime阶段的所述M条线路对第(M+1)条线路的串扰信道,即HJS。所述HJS信息用于CO计算所述(M+1)条线路在下行方向上的传输信道。Step 505: The (M+1)th CPE sends a superframe of the R-ERROR-SAMPLE signal to the CO, wherein the superframe of the R-ERROR-SAMPLE signal carries data at the position of the data symbol in the uplink direction Information, the data information includes the crosstalk channel between the M lines and the (M+1)th line in the showtime stage in the downlink direction, that is, H JS . The H JS information is used by the CO to calculate transmission channels of the (M+1) lines in the downlink direction.
进一步地,CPE发送R-ERROR-SAMPLE信号的阶段内构建的所有超帧在上行方向的数据符号位置上承载数据信息。Further, all superframes constructed during the period when the CPE sends the R-ERROR-SAMPLE signal carry data information at the position of the data symbol in the uplink direction.
更进一步地,在步骤503中CPE发送R-P-SILENT信号的超帧时,CO测量出所述第M条线路上的上行同步符号和所述M条的上行同步符号偏移量,并发送给所述第(M+1)个CPE。第(M+1)个CPE接收到CO通过短消息携带的同步符号偏移量,根据所述同步符号偏移量,移动R-P-SILENT信号的超帧中的同步符号的发送位置,使得第(M+1)条线路上的同步符号和其他处于showtime阶段的M条线路上的同步符号同时达到CO。Furthermore, when the CPE sends the superframe of the R-P-SILENT signal in step 503, the CO measures the uplink synchronization symbols on the M line and the offsets of the M uplink synchronization symbols, and sends them to the Describe the (M+1)th CPE. The (M+1)th CPE receives the synchronization symbol offset carried by the CO through the short message, and according to the synchronization symbol offset, moves the sending position of the synchronization symbol in the superframe of the R-P-SILENT signal, so that the ( The synchronization symbols on the M+1) lines and the synchronization symbols on the other M lines in the showtime phase reach the CO at the same time.
利用本实施例,先获取所述(M+1)条线路上的上行串扰抵消(Cancellation)系数矩阵,建立上行的Error Sample的返回通道,这样就能在保证上行方向上没有串扰的情况下,在向CO发送的数据符号上承载下行方向上处于showtime阶段的所述M条线路对新加入的第(M+1)条线路的串扰信道,CO就能根据CPE所反馈的下行方向上的串扰信道信息,计算出所述(M+1)条线路上的传输信道,从而获得下行预编码(Precode)系数矩阵来对下行方向的串扰进行消除。而在这过程中无论是上行方向还是下行方向,在没有获得系数矩阵(Cancellation系数矩阵和Precode系数矩阵)之前,都没有在对应方向上的数据符号位置上发送数据信息。因此对CO和CPE间所有处于showtime阶段用户的业务没有影响,最大限度地降低新线加入对处于showtime阶段的业务数据影响。Using this embodiment, the uplink crosstalk cancellation (Cancellation) coefficient matrix on the (M+1) lines is first obtained, and the return channel of the uplink Error Sample is established, so that under the condition that there is no crosstalk in the uplink direction, The data symbols sent to the CO carry the crosstalk channel of the M lines in the showtime stage in the downlink direction to the newly added (M+1)th line, and the CO can use the crosstalk in the downlink direction fed back by the CPE Channel information, calculating the transmission channels on the (M+1) lines, so as to obtain a downlink precoding (Precode) coefficient matrix to eliminate crosstalk in the downlink direction. In this process, whether it is the uplink direction or the downlink direction, no data information is sent at the data symbol position in the corresponding direction before the coefficient matrix (Cancellation coefficient matrix and Precode coefficient matrix) is obtained. Therefore, there is no impact on the services of all users in the showtime period between the CO and the CPE, and the impact of new lines on the service data in the showtime period is minimized.
本发明实施例还提供一种线路初始化方法,所述线路就为CO与多个CPE连接的线路,其中M条线路已经进入showtime阶段,第(M+1)个CPE对应的第(M+1)条线路新加入时,即进入信道发现(Channel-discovery)阶段后,从CO侧进行描述,如图7所示,所述方法包括:The embodiment of the present invention also provides a line initialization method. The line is a line connecting a CO to multiple CPEs. M lines have entered the showtime stage, and the (M+1)th CPE corresponding to the (M+1)th CPE ) lines are newly added, that is, after entering the channel discovery (Channel-discovery) stage, describe from the CO side, as shown in Figure 7, the method includes:
步骤701:所述CO发送O-P-SILENT信号或O-P-PILOT信号的超帧给所述第(M+1)条线路对应的所述第(M+1)个CPE,其中所述O-P-SILENT信号或O-P-PILOT信号的超帧在下行方向的数据符号位置上没有信号,而在下行方向的同步符号位置上承载有同步符号;Step 701: The CO sends a superframe of O-P-SILENT signal or O-P-PILOT signal to the (M+1)th CPE corresponding to the (M+1)th line, wherein the O-P-SILENT signal Or the superframe of the O-P-PILOT signal has no signal at the position of the data symbol in the downlink direction, but carries a sync symbol at the position of the sync symbol in the downlink direction;
所述下行方向的同步符号位置上的同步符号信息能用于计算出在下行方向上处于showtime阶段的所述M条线路的对所述第(M+1)条线路串扰信道,即HJS。The synchronization symbol information at the synchronization symbol position in the downlink direction can be used to calculate the crosstalk channel for the (M+1)th line of the M lines in the showtime stage in the downlink direction, that is, H JS .
进一步地,CO发送O-P-SILENT信号的阶段或发送O-P-PILOT信号的阶段内构建的所有超帧,在下行方向的数据符号位置上没有信号,而在下行方向的同步符号位置上发送同步符号。Further, in all the superframes constructed during the stage when the CO sends the O-P-SILENT signal or the stage of sending the O-P-PILOT signal, there is no signal at the position of the data symbol in the downlink direction, and a sync symbol is sent at the position of the sync symbol in the downlink direction.
更进一步地,所述CO在第(M+1)条线路上发送的O-P-SILENT信号或O-P-PILOT信号的超帧中的同步符号与其他线路上超帧中的同步符号是同时发送的。Furthermore, the synchronization symbol in the superframe of the O-P-SILENT signal or the O-P-PILOT signal sent by the CO on the (M+1)th line is sent simultaneously with the synchronization symbols in the superframe on other lines.
步骤703:所述CO接收所述第(M+1)个CPE发送的R-P-SILENT信号的超帧,其中所述R-P-SILENT信号的超帧在上行方向的数据符号位置上没有任何信号,而上行方向的同步符号位置上承载同步符号;所述CO根据接收到的所述R-P-SILENT信号的超帧在同步符号位置上的同步符号信息计算上行方向上整个(M+1)条线路上的传输信道,所述上行方向上(M+1)条线路上的传输信道能用于所述CO消除所有(M+1)条线路上在上行方向的数据传输时产生的串扰。Step 703: The CO receives the superframe of the R-P-SILENT signal sent by the (M+1)th CPE, wherein the superframe of the R-P-SILENT signal has no signal at the position of the data symbol in the uplink direction, and The synchronization symbol position in the uplink direction carries the synchronization symbol; the CO calculates the synchronization symbol information on the entire (M+1) lines in the uplink direction according to the received synchronization symbol information at the synchronization symbol position in the superframe of the R-P-SILENT signal The transmission channel, the transmission channel on the (M+1) lines in the uplink direction can be used by the CO to eliminate crosstalk generated during data transmission in the uplink direction on all the (M+1) lines.
进一步地,CPE发送R-P-SILENT信号的阶段内构建的所有超帧在上行方向的数据符号位置上没有任何信号,而上行方向的同步符号位置上承载同步符号。Further, all superframes constructed during the period when the CPE sends the R-P-SILENT signal do not have any signal at the position of the data symbol in the uplink direction, while the position of the sync symbol in the uplink direction carries the synchronization symbol.
更进一步本步骤还包括步骤703-1(附图中没有标示):在接收到R-P-SILENT信号的超帧前,所述CO接收所述第(M+1)个CPE发送的R-P-QUIET信号的超帧,其中所述(M+1)CPE发送R-P-QUIET信号的阶段中构建的所有超帧在上行方向的数据符号和同步符号位置上都不承载信号。Furthermore, this step also includes step 703-1 (not marked in the figure): before receiving the superframe of the R-P-SILENT signal, the CO receives the R-P-QUIET signal sent by the (M+1)th CPE , wherein all superframes constructed in the stage when the (M+1) CPE sends the R-P-QUIET signal do not carry signals at the positions of data symbols and synchronization symbols in the uplink direction.
步骤705:所述CO接收第(M+1)个CPE发送的R-ERROR-SAMPLE信号的超帧,其中所述R-ERROR-SAMPLE信号的超帧在上行方向的数据符号位置上承载数据信息,所述数据信息包括下行方向的处于showtime阶段的所述M条线路对第(M+1)条线路的串扰信道,即HJS。Step 705: The CO receives the superframe of the R-ERROR-SAMPLE signal sent by the (M+1)th CPE, wherein the superframe of the R-ERROR-SAMPLE signal carries data information at the position of the data symbol in the uplink direction , the data information includes the crosstalk channel between the M lines and the (M+1)th line in the showtime phase in the downlink direction, that is, H JS .
进一步地,CPE发送R-ERROR-SAMPLE信号的阶段内构建的所有超帧在上行方向的数据符号位置上承载数据信息。Further, all superframes constructed during the period when the CPE sends the R-ERROR-SAMPLE signal carry data information at the position of the data symbol in the uplink direction.
并且,本实施例的方法进一步包括,步骤707:所述CO根据所述第(M+1)个CPE反馈的HJS信息,计算出所述(M+1)条线路在下行方向上的传输信道。Moreover, the method of this embodiment further includes, step 707: the CO calculates the transmission channel of the (M+1)th line in the downlink direction according to the H JS information fed back by the (M+1)th CPE .
所述CO获得所述第(M+1)个CPE反馈的HJS信息后,结合以及已经获取的下行方向上的HSS和HSJ(HSS的获取方式是现有技术,这里不进行描述;HSJ可以从其他线路上报给CO的信息获得),就可以计算出所述整个(M+1)条线路在下行方向上的传输信道。After the CO obtains the H JS information fed back by the (M+1)th CPE, it combines the acquired H SS and H SJ in the downlink direction (the acquisition method of H SS is the existing technology, and will not be described here ; H SJ can be obtained from information reported to the CO by other lines), and the transmission channel of the entire (M+1) lines in the downlink direction can be calculated.
进一步地,在上述步骤703中的CO接收所述第(M+1)个CPE发送的R-P-SILENT信号的超帧时,CO测量出所述第M条线路上的上行同步符号和所述M条的上行同步符号偏移量,并发送给所述第(M+1)个CPE。所述第(M+1)个CPE接收到CO通过短消息携带的同步符号偏移量,可以根据该偏移量,移动R-P-SILENT信号的超帧中的同步符号的发送位置,使得第(M+1)条线路上的同步符号和其他处于showtime阶段的M条线路上的同步符号同时达到CO。Further, when the CO in the above step 703 receives the superframe of the R-P-SILENT signal sent by the (M+1)th CPE, the CO measures the uplink synchronization symbol on the Mth line and the M The uplink synchronization symbol offset of the bar is sent to the (M+1)th CPE. The (M+1)th CPE receives the synchronization symbol offset carried by the CO through the short message, and can move the sending position of the synchronization symbol in the superframe of the R-P-SILENT signal according to the offset, so that the ( The synchronization symbols on the M+1) lines and the synchronization symbols on the other M lines in the showtime phase reach the CO at the same time.
利用本实施例,先获取所述(M+1)条线路上的上行串扰抵消(Cancellation)系数矩阵,这样就能在保证上行方向上没有串扰的情况下,在CO接收到的数据符号上承载有下行方向上处于showtime阶段的所述M条线路对新加入的第(M+1)条线路的串扰信道,CO就能根据CPE所反馈的下行方向上的串扰信道信息,计算出所述(M+1)条线路上的传输信道,从而获得下行预编码(Precode)系数矩阵来对下行方向的串扰进行消除。Using this embodiment, first obtain the uplink crosstalk cancellation (Cancellation) coefficient matrix on the (M+1) lines, so that the data symbols received by the CO can be carried on the condition that there is no crosstalk in the uplink direction. If there is a crosstalk channel between the M lines in the showtime stage in the downlink direction and the newly added (M+1)th line, the CO can calculate the ( M+1) transmission channels on the lines, so as to obtain the downlink precoding (Precode) coefficient matrix to eliminate the crosstalk in the downlink direction.
本发明实施例还提供一种网络侧设备800,所述网络侧设备800至少通过第(M+1)条线路与第(M+1)个CPE相连;所述第(M+1)条线路和其他M条线路形成串扰,如图8所示,所述网络侧设备800包括信号收发器802、和上行传输信道处理单元804;The embodiment of the present invention also provides a network side device 800, the network side device 800 is connected to the (M+1)th CPE at least through the (M+1)th line; the (M+1)th line Forming crosstalk with other M lines, as shown in FIG. 8 , the network side device 800 includes a signal transceiver 802 and an uplink transmission channel processing unit 804;
所述信号收发器802发送O-P-SILENT信号或O-P-PILOT信号的超帧给所述第(M+1)个CPE,其中所述O-P-SILENT信号或O-P-PILOT信号的超帧在下行方向的数据符号位置上没有信号,而在下行方向的同步符号位置上承载有同步符号;The signal transceiver 802 sends the superframe of the O-P-SILENT signal or the O-P-PILOT signal to the (M+1)th CPE, where the superframe of the O-P-SILENT signal or the O-P-PILOT signal is in the downlink direction There is no signal at the position of the data symbol, but a sync symbol is carried at the position of the sync symbol in the downlink direction;
所述信号收发器802接收所述第(M+1)个CPE发送的R-P-SILENT信号的超帧,其中所述R-P-SILENT信号的超帧在上行方向的数据符号位置上没有任何信号,而上行方向的同步符号位置上承载同步符号;The signal transceiver 802 receives the superframe of the R-P-SILENT signal sent by the (M+1)th CPE, wherein the superframe of the R-P-SILENT signal has no signal at the position of the data symbol in the uplink direction, and The sync symbol position in the uplink direction carries the sync symbol;
所述上行传输信道处理单元804根据接收到的所述R-P-SILENT信号的超帧中在同步符号位置上的同步符号信息计算上行方向上所有线路上的传输信道,并根据计算出的所述上行方向上(M+1)条线路上的传输信道消除所有(M+1)条线路上在上行方向的数据传输时产生的串扰。The uplink transmission channel processing unit 804 calculates transmission channels on all lines in the uplink direction according to the synchronization symbol information at the synchronization symbol position in the superframe of the received R-P-SILENT signal, and according to the calculated uplink The transmission channel on (M+1) lines in the row direction eliminates crosstalk generated during data transmission in the uplink direction on all (M+1) lines.
所述信号收发器802接收第(M+1)个CPE发送的R-ERROR-SAMPLE信号的超帧,其中所述R-ERROR-SAMPLE信号的超帧中在上行方向的数据符号位置上承载数据信息,所述数据信息包括下行方向的处于showtime阶段的所述M条线路对第(M+1)条线路的串扰信道,即HJS。The signal transceiver 802 receives the superframe of the R-ERROR-SAMPLE signal sent by the (M+1)th CPE, wherein the superframe of the R-ERROR-SAMPLE signal carries data at the position of the data symbol in the uplink direction Information, the data information includes the crosstalk channel between the M lines and the (M+1)th line in the showtime stage in the downlink direction, that is, H JS .
进一步地,所述信号收发器802发送O-P-SILENT信号的阶段或发送O-P-PILOT信号的阶段内构建的所有超帧,在下行方向的数据符号位置上没有信号,而在下行方向的同步符号位置上发送同步符号。Further, in all the superframes constructed in the stage of sending the O-P-SILENT signal or the stage of sending the O-P-PILOT signal by the signal transceiver 802, there is no signal at the data symbol position in the downlink direction, and there is no signal at the sync symbol position in the downlink direction Send sync symbols on.
还进一步地,所述信号收发器802在第(M+1)条线路上发送的O-P-SILENT信号或O-P-PILOT信号的超帧中的同步符号与其他线路上超帧中的同步符号是同时发送的。Still further, the synchronization symbol in the superframe of the O-P-SILENT signal or O-P-PILOT signal sent by the signal transceiver 802 on the (M+1)th line is synchronized with the synchronization symbols in the superframe on other lines sent.
更进一步地,所述信号收发器802接收所述第(M+1)个CPE发送的R-P-QUIET信号的超帧,其中所述R-P-QUIET信号的超帧中在上行方向的数据符号和同步符号位置上都不承载信号。Furthermore, the signal transceiver 802 receives the superframe of the R-P-QUIET signal sent by the (M+1)th CPE, wherein the data symbols and synchronization data symbols in the uplink direction in the superframe of the R-P-QUIET signal None of the symbol positions carry signals.
进一步地,所述网络侧设备800还包括下行传输信道处理单元806,所述下行传输信道处理单元806根据所述第(M+1)个CPE反馈的HJS信息,计算出所述(M+1)条线路在下行方向上的传输信道。具体地,所述下行传输信道处理单元806根据获得所述第(M+1)个CPE反馈的HJS信息后,结合以及已经获取的下行方向上的HSS和HSJ,就可以计算出所述整个(M+1)条线路在下行方向上的传输信道。Further, the network side device 800 also includes a downlink transmission channel processing unit 806, and the downlink transmission channel processing unit 806 calculates the (M+ 1) The transmission channel of the line in the downlink direction. Specifically, after obtaining the H JS information fed back by the (M+1)th CPE, the downlink transmission channel processing unit 806 combines the obtained H SS and H SJ in the downlink direction to calculate the Describe the transmission channels of the entire (M+1) lines in the downlink direction.
更进一步地,所述网络侧设备800还包括偏移量获取单元808,所述偏移量获取单元808在接收到R-P-SILENT信号的超帧时,测量出所述第M条线路上的上行同步符号和所述M条的上行同步符号偏移量,并将该偏移量通过所述信号收发器802发送给所述第(M+1)个CPE。具体可以通过短消息进行通知。Furthermore, the network side device 800 also includes an offset acquisition unit 808, the offset acquisition unit 808 measures the uplink on the Mth line when receiving the superframe of the R-P-SILENT signal The synchronization symbol and the offset of the M uplink synchronization symbols, and send the offset to the (M+1)th CPE through the signal transceiver 802 . Specifically, it can be notified through a short message.
需要进一步说明的是,所述网络侧设备中的信号收发器802、上行传输信道处理单元804和下行传输信道处理单元806所执行的具体动作就是上文方法实施例中的方法,具体步骤不再赘述。It should be further explained that the specific actions performed by the signal transceiver 802, the uplink transmission channel processing unit 804, and the downlink transmission channel processing unit 806 in the network side device are the methods in the above method embodiments, and the specific steps are not repeated here. repeat.
本发明实施例还提供一种用户侧设备900,所述用户侧设备通过第(M+1)条线路与CO相连,所述第(M+1)条线路和与所述CO相连的其他M条线路形成串扰,如图9所示,包括信号收发器902、下行传输信道计算单元904;The embodiment of the present invention also provides a user-side device 900, the user-side device is connected to the CO through the (M+1)th line, and the (M+1)th line is connected to the other M Lines form crosstalk, as shown in Figure 9, including a signal transceiver 902, a downlink transmission channel calculation unit 904;
所述信号收发器902接收CO发送的O-P-SILENT信号或O-P-PILOT信号的超帧,其中所述O-P-SILENT信号或O-P-PILOT信号的超帧中在下行方向的数据符号位置上没有信号,而在下行方向的同步符号位置上承载有同步符号;并根据所述下行方向的同步符号位置上的同步符号信息,计算出在下行方向上所述第(M+1)条线路对处于showtime阶段的所述M条线路的串扰信道,即HJS;The signal transceiver 902 receives the superframe of the OP-SILENT signal or OP-PILOT signal sent by the CO, wherein there is no signal at the position of the data symbol in the downlink direction in the superframe of the OP-SILENT signal or OP-PILOT signal, The sync symbol position in the downlink direction carries a sync symbol; and according to the sync symbol information at the sync symbol position in the downlink direction, calculate the (M+1)th line pair in the showtime stage in the downlink direction The crosstalk channel of the M lines, namely H JS ;
所述信号收发器902发送R-P-SILENT信号的超帧给所述CO,其中所述R-P-SILENT信号的超帧在上行方向的数据符号位置上没有任何信号,而上行方向的同步符号位置上承载同步符号;所述上行方向的同步符号位置上的同步符号信息用于计算上行方向上整个(M+1)条线路上的传输信道;所述上行方向上整个(M+1)条线路上的传输信道用于消除在上行方向上数据传输时整个(M+1)条线路之间的串扰;The signal transceiver 902 sends a superframe of the R-P-SILENT signal to the CO, wherein the superframe of the R-P-SILENT signal does not have any signal in the position of the data symbol in the uplink direction, and carries a signal in the position of the sync symbol in the uplink direction Synchronization symbol; the synchronization symbol information on the synchronization symbol position in the uplink direction is used to calculate the transmission channel on the entire (M+1) lines in the uplink direction; the transmission channel on the entire (M+1) lines in the uplink direction The transmission channel is used to eliminate crosstalk between the entire (M+1) lines during data transmission in the uplink direction;
所述信号收发器902发送R-ERROR-SAMPLE信号的超帧给所述CO,其中所述R-ERROR-SAMPLE信号的超帧中在上行方向的数据符号位置上承载数据信息,所述数据信息包括下行方向的处于showtime阶段的所述M条线路对第(M+1)条线路的串扰信道,即HJS。所述HJS信息用于CO计算所述(M+1)条线路在下行方向上的传输信道。The signal transceiver 902 sends the superframe of the R-ERROR-SAMPLE signal to the CO, wherein the superframe of the R-ERROR-SAMPLE signal carries data information at the position of the data symbol in the uplink direction, and the data information It includes the crosstalk channel between the M lines in the showtime stage in the downlink direction and the (M+1)th line, that is, H JS . The H JS information is used by the CO to calculate transmission channels of the (M+1) lines in the downlink direction.
更进一步地,所述信号收发器902发送R-P-SILENT信号的阶段内构建的所有超帧在上行方向的数据符号位置上没有任何信号,而上行方向的同步符号位置上承载同步符号;Furthermore, all the superframes constructed during the period when the signal transceiver 902 sends the R-P-SILENT signal do not have any signal at the position of the data symbol in the uplink direction, and the position of the sync symbol in the uplink direction carries a sync symbol;
进一步地,所述信号收发器902在发送R-P-SILENT信号的超帧前,发送R-P-QUIET信号的超帧给所述CO,但所述R-P-QUIET信号的超帧中在上行方向的数据符号和同步符号位置上都不发送信号;Further, the signal transceiver 902 sends the superframe of the R-P-QUIET signal to the CO before sending the superframe of the R-P-SILENT signal, but the data symbols in the uplink direction in the superframe of the R-P-QUIET signal No signal is sent at and sync symbol positions;
还进一步地,所述信号收发器902发送R-ERROR-SAMPLE信号的阶段内构建的所有超帧在上行方向的数据符号位置上承载数据信息。Still further, all superframes constructed during the period when the signal transceiver 902 sends the R-ERROR-SAMPLE signal carry data information at the data symbol position in the uplink direction.
更进一步地,所述用户侧设备900还包括偏移量获取单元906,所述偏移量获取单元906接收到CO通过短消息携带的同步符号偏移量,根据所述同步符号偏移量,移动R-P-SILENT信号的超帧中的同步符号的发送位置,使得第(M+1)条线路上同步符号和其他处于showtime阶段的M条线路上的同步符号同时达到CO。Furthermore, the user-side equipment 900 also includes an offset acquisition unit 906, the offset acquisition unit 906 receives the synchronization symbol offset carried by the CO through the short message, and according to the synchronization symbol offset, Move the sending position of the synchronization symbol in the superframe of the R-P-SILENT signal, so that the synchronization symbol on the (M+1)th line and the synchronization symbols on other M lines in the showtime stage reach the CO at the same time.
需要进一步说明的是,所述用户侧设备中的信号收发器902和下行传输信道计算单元904所执行的具体动作就是上文方法实施例中的方法,具体步骤不再赘述。It should be further explained that the specific actions performed by the signal transceiver 902 and the downlink transmission channel calculation unit 904 in the user-side device are the methods in the above method embodiments, and the specific steps will not be repeated here.
本发明实施例还提供一种网络系统1000,所述系统包括网络侧设备1001和多个用户侧设备1003,所述网络侧设备1001通过多条线路1005分别多个用户侧设相连接,如N条,其中的M条线路已经进入showtime阶段,1<M<N。The embodiment of the present invention also provides a network system 1000. The system includes a network side device 1001 and multiple user side devices 1003. The network side device 1001 is connected to multiple user side devices through multiple lines 1005, such as N Lines, among which M lines have entered the showtime stage, 1<M<N.
所述网络侧设备1001就是上文实施例中的网络侧设备800,用户侧设备1002就是上文实施例中的用户侧设备900。The network side device 1001 is the network side device 800 in the above embodiment, and the user side device 1002 is the user side device 900 in the above embodiment.
需要进一步说明的是,所述网络侧设备1001和用户侧设备1003所执行的具体动作就是上文方法实施例中的方法,具体步骤不再赘述。It should be further explained that the specific actions performed by the network-side device 1001 and the user-side device 1003 are the methods in the above method embodiments, and the specific steps will not be repeated here.
本领域普通技术人员可以理解:实现上述方法实施例的全部或部分步骤可以通过程序指令相关的硬件来完成,前述的程序可以存储于一计算机可读取存储介质中,该程序在执行时,执行包括上述方法实施例的步骤;而前述的存储介质包括:ROM、RAM、磁碟或者光盘等各种可以存储程序代码的介质。具体为以上所述的网络处理过程可以在诸如具有足够的处理能力、存储器资源和网络吞吐量能力的计算机或网络部件的通用部件上实施。图11示意性地表示适于实施本文中公开的部件的一个或多个实施例的电性的通用网络部件1100。该网络部件1100包括处理器1102(可被称为中央处理单元或CPU),该处理器1102与包括第二存储器1104、只读存储器(ROM)1106、随即存取存储器(RAM)1108、输入/输出(I/O)设备1110和网络连接性设备1112在内的存储器设备通信。该处理器1102可被实施为一个或多个CPU芯片,或是被实施为一个或多个专用集成电路的一部分。Those of ordinary skill in the art can understand that all or part of the steps for realizing the above-mentioned method embodiments can be completed by hardware related to program instructions, and the aforementioned program can be stored in a computer-readable storage medium. When the program is executed, the It includes the steps of the above method embodiments; and the aforementioned storage medium includes: ROM, RAM, magnetic disk or optical disk and other various media that can store program codes. Specifically, the network processing procedures described above may be implemented on general-purpose components such as computers or network components having sufficient processing power, memory resources, and network throughput capabilities. Fig. 11 schematically represents an electrical general network component 1100 suitable for implementing one or more embodiments of the components disclosed herein. The network element 1100 includes a processor 1102 (which may be referred to as a central processing unit or CPU), which communicates with a second memory 1104, a read only memory (ROM) 1106, a random access memory (RAM) 1108, an input/ Output (I/O) devices 1110 communicate with memory devices, including network connectivity devices 1112 . The processor 1102 may be implemented as one or more CPU chips, or as part of one or more application specific integrated circuits.
该第二存储器1104典型地由一个或多个盘驱动器或碟驱动器构成,并用于数据的非易失性存储,以及如果RAM1108没有达到足以容纳所有工作数据则用作溢出数据存储设备。第二存储器1104可用于存储那些当被选择用于执行时被装入RAM1108的程序。ROM1106被用于存储指令以及或者在程序执行期间读取的数据。ROM1106是一种非易失性存储器设备,其典型地具有相对于第二存储器1104的较大存储器容量较小的存储器容量。RAM1108用于存储易失性数据,并可能存储指令。对ROM1106和RAM1108的访问通常比对第二存储器1104的访问快。This secondary storage 1104 is typically comprised of one or more disk drives or disk drives and is used for non-volatile storage of data and as an overflow data storage device if RAM 1108 is not large enough to hold all working data. Secondary storage 1104 may be used to store programs that are loaded into RAM 1108 when selected for execution. ROM 1106 is used to store instructions and or data that are read during program execution. ROM 1106 is a non-volatile memory device that typically has a smaller memory capacity relative to the larger memory capacity of secondary memory 1104 . RAM 1108 is used to store volatile data and possibly instructions. Access to ROM 1106 and RAM 1108 is generally faster than access to secondary memory 1104 .
最后应说明的是:以上各实施例仅用以说明本发明的技术方案,而非对其限制;尽管参照前述各实施例对本发明进行了详细的说明,本领域的普通技术人员应当理解:其依然可以对前述各实施例所记载的技术方案进行修改,或者对其中部分或者全部技术特征进行等同替换;而这些修改或者替换,并不使相应技术方案的本质脱离本发明各实施例技术方案的范围。Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present invention, rather than limiting them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: It is still possible to modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the technical solutions of the various embodiments of the present invention. scope.
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