CN103765789B - Line initialization method, apparatus, and system - Google Patents

Line initialization method, apparatus, and system Download PDF

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Publication number
CN103765789B
CN103765789B CN201380002180.0A CN201380002180A CN103765789B CN 103765789 B CN103765789 B CN 103765789B CN 201380002180 A CN201380002180 A CN 201380002180A CN 103765789 B CN103765789 B CN 103765789B
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signal
superframe
synchronizing symbol
circuit
sends
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CN103765789A (en
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刘建华
王祥
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Huawei Technologies Co Ltd
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Huawei Technologies Co Ltd
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B3/00—Line transmission systems
    • H04B3/02—Details
    • H04B3/32—Reducing cross-talk, e.g. by compensating
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M11/00—Telephonic communication systems specially adapted for combination with other electrical systems
    • H04M11/06—Simultaneous speech and data transmission, e.g. telegraphic transmission over the same conductors
    • H04M11/062—Simultaneous speech and data transmission, e.g. telegraphic transmission over the same conductors using different frequency bands for speech and other data

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)

Abstract

The embodiment of the invention provides a line initialization method. Data information is not transmitted in data symbol positions in corresponding directions before the acquisition of coefficient matrices (cancellation coefficient matrix and precode coefficient matrix) no matter in the up direction or the down direction. A CO acquires transmission information in all lines in the up direction at first so as to eliminate the crosstalk generated during data transmission in the up direction of all the lines. In this way, it is ensured that no crosstalk exists in the up direction after a return channel of an up error sample is established, so that a crosstalk channel in the down direction can be borne on data symbols transmitted from a CPE to the CO and the CO can calculate and obtain a transmission channel in the down direction of the lines based on crosstalk channel information fed back by the CPE in the down direction. Thus, the down precode coefficient matrix is obtained to eliminate the crosstalk in the down direction. Therefore, services between the CO and the CPE are not affected and influences, caused by joining of a new line, on service data is reduced to the maximum extent.

Description

A kind of circuit initial method, device and system
Technical field
The present invention relates to field of data communication, specifically, relate to a kind of circuit initial method, device and system.
Background technology
Digital subscriber line (DSL, Digital Subscriber Line) is a kind of on twisted pair telephone, such as unshielded twisted pair (UTP, Unshielded Twist Pair), the Highspeed Data Transmission Technology of transmission.There is in DSL system multichannel DSL line, at present usual by DSL couple in multiplexer (DSLAM, DigitalSubscriber Line Access Multiplexer) for multichannel DSL line provides access service.But, due to electromagnetic induction principle, crosstalk (Crosstalk) mutually can be produced between the multiple signals of access DSLAM.Twisted-pair feeder is very strong in the crosstalk of high frequency, in order to eliminate crosstalk, such as, vector quantization (Vectored) DSL technology can be adopted to eliminate far-end cross talk.
Existing Vectored DSL technology, main utilization holds the characteristic of carrying out combined transceiving at DSLAM, uses the method for signal transacting to offset the interference of FEXT.FEXT interference in each road signal of final elimination.Fig. 1 shows and holds synchronized transmission and the synchronous schematic diagram received at DSLAM.Network equipment is connected by M bar twisted-pair feeder and M user side equipment (Customer premise Equipment, CPE).
Can matrix form be expressed as on a frequency domain kth subcarrier (tone) at the shared channel H of downlink or uplink:
H ijrepresent line to j to the transmission equation of line to i, wherein 0≤i≤M, 0≤j≤M.In practical situations both, i, j are equal and equal the number of lines of Vectored DSL system, are set to M here.So H is the channel transfer matrices of a M × M.Establish again x to be the channel input vector of M × 1 respectively, y is the channel output vector of M × 1, and n is the noise vector of M × 1.Finally, transmission equation is expressed as following form:
y=Hx+n
In uplink signal transmissions process, at central office (Central Office, CO) end, namely network equipment signal combines reception process, and introduce a crosstalk cancellation device W at receiving terminal, then the signal received is:
y ~ = Wy = WHx + Wn
When WH is a diagonal matrix, cross-talk will be eliminated.
In downstream signal transmitting procedure, do the associating transmission processing of signal at CO end, hold introducing precoder P at CO, then the signal sent is:
x ~ = Px
The signal that receiving terminal receives is:
y ~ = H x ~ + n = HPx + n
When HP is a diagonal matrix, cross-talk will be eliminated.
Comprehensively learn, the key point in Vectored-DSL technology estimates downlink precoding matrix P and up counteracting matrix W.Obtaining H by measuring, then calculating W and P according to the relation of H and W, P.Synchronous by synchronizing symbol (Sync Symbol), vector quantization controlled entity (Vectoring Control Entity, VCE) is to all circuits unified distribution pilot frequency sequence (Pilot Sequence).Measure H to need just to carry orthogonal pilot frequency sequence (Vector pilot sequence) in the special DMT symbol sent, this special DMT symbol is also Vector training symbol, receiver is by receiving these Vector training symbols, and estimating crosstalk channels H, this process is called Vector training.
When have newly add lambda line initialization time, conveniently describe how to obtain H, the matrix of the direct channels between circuit and crosstalk crosstalk channels write as: H = H SS H SJ H JS H JJ ,
Wherein: H sSfor being in showtime stage (i.e. data transmission phase) circuit to the cross-talk submatrix being in showtime stage circuit; The showtime stage refers to initialization and has trained rear entered data transmission phase;
H sJfor initiating line is to the cross-talk submatrix being in showtime stage circuit;
H jSfor being in the cross-talk submatrix of showtime stage circuit to initiating line;
H jJfor initiating line is to the cross-talk submatrix of initiating line;
Due to H jSand H jJonly have and set up could feed back to CO by VCE to training stage up backward channel, and when newly adding lambda line initialization, initiating line does not also have the ability of feeding back downlink Error Sample.Generally, actual H is not being obtained jSand H jJunder condition, also according to use Linear Precoding, directly can use formula P = H SS - 1 D S - H SS - 1 H SJ 0 1 Estimate P, wherein D s=Diag (H sS).But adopt the rising of frequency or the enhancing of coupling as the G.fast technology of DSL technology of new generation, when crosstalk channel is strengthened to a certain degree relative to direct channels, the P that the above-mentioned formulae discovery of direct use goes out can obviously be deteriorated to the effect that circuit carries out precoding, thus cause being in the crosstalk from initiating line that showtime stage circuit receives and can not better offset, make the SNR(Signal-Noise Ratio being in showtime stage circuit, signal to noise ratio) decline and may error code be caused.
Summary of the invention
Embodiments provide a kind of circuit initial method, device and system, add in order to reduce new line to greatest extent business datum is affected.
First aspect, provides a kind of circuit initial method, comprising:
CPE receives the O-P-SILENT signal of CO transmission or the superframe of O-P-PILOT signal, the superframe of wherein said O-P-SILENT signal or O-P-PILOT signal does not have signal in the data symbol positions of down direction, and on the synchronizing symbol position of down direction, carry synchronizing symbol; The synchronizing symbol information that the synchronizing symbol position of described down direction carries calculates All other routes to described CPE place circuit crosstalk channels in the downstream direction for described CPE, i.e. H jS; Described All other routes are the circuit that other CPE are connected with described CO;
Described CPE sends the superframe of R-P-SILENT signal to described CO, and the superframe of wherein said R-P-SILENT signal without any signal, and the synchronizing symbol position of up direction carries synchronizing symbol in the data symbol positions of up direction; Synchronizing symbol information on the synchronizing symbol position of described up direction is for calculating the transmission channel on up direction on all circuits; The crosstalk that transmission channel on described up direction on all circuits produces when described CO to eliminate on all circuits transfer of data in the row direction;
Described CPE sends the superframe of R-ERROR-SAMPLE signal to described CO, and superframe carry data information in the data symbol positions of up direction of wherein said R-ERROR-SAMPLE signal, described data message comprises described H jS.
In the first possible implementation of first aspect, described CPE sends all superframes of building in the stage of R-P-SILENT signal without any signal in the data symbol positions of up direction, and carries synchronizing symbol on the synchronizing symbol position of up direction.
In conjunction with the first mode in the cards of first aspect or first aspect, in the second mode in the cards, before the superframe sending R-P-SILENT signal, described CPE sends the superframe of R-P-QUIET signal to described CO, but the stage interior all superframes built that described CPE sends R-P-QUIET signal do not send signal on the data symbol and synchronizing symbol position of up direction.
In conjunction with the first mode in the cards of first aspect, first aspect or the second mode in the cards of first aspect, in the third mode in the cards, described CPE sends all superframes carry data information in the data symbol positions of up direction built in the stage of R-ERROR-SAMPLE signal.
In conjunction with the third mode in the cards of the first mode in the cards of first aspect, first aspect, the second mode in the cards of first aspect or first aspect, in the 4th kind of mode in the cards, described CPE receives the synchronizing symbol side-play amount that CO is carried by short message, according to described synchronizing symbol side-play amount, the transmission position of the synchronizing symbol in the superframe of mobile R-P-SILENT signal, make described CPE synchronizing symbol on synchronizing symbol on the line and All other routes reach CO simultaneously.
Second aspect, provides a kind of circuit initial method, and described circuit is many circuits that CO is connected with multiple CPE, and (M+1) article circuit that wherein (M+1) individual CPE is corresponding and other M articles of circuits form crosstalk, M >=1; Described method comprises:
The superframe that described CO sends O-P-SILENT signal or O-P-PILOT signal is to described (M+1) individual CPE corresponding to described (M+1) article circuit, the superframe of wherein said O-P-SILENT signal or O-P-PILOT signal does not have signal in the data symbol positions of down direction, and on the synchronizing symbol position of down direction, carry synchronizing symbol; Synchronizing symbol information on the synchronizing symbol position of described down direction be used for calculating in the downstream direction described M article circuit to the crosstalk channels of described (M+1) article circuit, i.e. H jS;
Described CO receives the superframe of the R-P-SILENT signal that described (M+1) individual CPE sends, the superframe of wherein said R-P-SILENT signal without any signal, and the synchronizing symbol position of up direction carries synchronizing symbol in the data symbol positions of up direction; Described CO calculates the transmission channel on up direction on whole (M+1) bar circuit according to the synchronizing symbol information of the superframe of the described R-P-SILENT signal received on synchronizing symbol position, the crosstalk that the transmission channel on described up direction on (M+1) bar circuit produces when described CO eliminates the transfer of data at up direction on all (M+1) bar circuits;
Described CO receives the superframe of the R-ERROR-SAMPLE signal that (M+1) individual CPE sends, and superframe carry data information in the data symbol positions of up direction of wherein said R-ERROR-SAMPLE signal, described data message comprises described H jS.
In the first possible implementation of second aspect, described CO is according to the H of described (M+1) individual CPE feedback jSinformation, calculates described (M+1) bar circuit transmission channel in the downstream direction.
In conjunction with the first mode in the cards of second aspect or second aspect, in the second mode in the cards, described CO sends the stage of O-P-SILENT signal or sends all superframes built in the stage of O-P-PILOT signal, the data symbol positions of down direction does not have signal, and send synchronizing symbol on the synchronizing symbol position of down direction.
In conjunction with the first possible implementation of second aspect, second aspect or the second mode in the cards of second aspect, in the third mode in the cards, the synchronizing symbol on the synchronizing symbol in the superframe of the O-P-SILENT signal that described CO sends on (M+1) article circuit or O-P-PILOT signal and All other routes in superframe sends simultaneously.
In conjunction with the third mode in the cards of the first possible implementation of second aspect, second aspect, the second mode in the cards of second aspect or second aspect, in the 4th kind of mode in the cards, when described CO receives the superframe of the R-P-SILENT signal that described (M+1) individual CPE sends, described CO measures the uplink synchronous symbol offset amount of uplink synchronous symbol on described M article of circuit and described M article and sends to described (M+1) individual CPE.
The third aspect, provides a kind of network equipment, and described network equipment is at least connected with (M+1) individual CPE by (M+1) article circuit; Described (M+1) article circuit and other M articles of circuits form crosstalk, and described network equipment comprises signal transceiver and uplink transport channel processing unit;
Described signal transceiver sends the superframe of O-P-SILENT signal or O-P-PILOT signal to described (M+1) individual CPE, the superframe of wherein said O-P-SILENT signal or O-P-PILOT signal does not have signal in the data symbol positions of down direction, and on the synchronizing symbol position of down direction, carry synchronizing symbol;
Described signal transceiver receives the superframe of the R-P-SILENT signal that described (M+1) individual CPE sends, the superframe of wherein said R-P-SILENT signal without any signal, and the synchronizing symbol position of up direction carries synchronizing symbol in the data symbol positions of up direction;
Described uplink transport channel processing unit calculates the transmission channel on up direction on all circuits according to the synchronizing symbol information in the superframe of the described R-P-SILENT signal received on synchronizing symbol position, and eliminates the crosstalk that all (M+1) bar circuits produce when the transfer of data of up direction according to the transmission channel on (M+1) bar circuit on the described up direction calculated;
Described signal transceiver receives the superframe of the R-ERROR-SAMPLE signal that (M+1) individual CPE sends, in the superframe of wherein said R-ERROR-SAMPLE signal in the data symbol positions of up direction carry data information, described data message comprises described M article of circuit of down direction to the crosstalk channels of (M+1) article circuit, i.e. H jS.
In the first possible implementation of the third aspect, described network equipment also comprises descending transmission channel processing unit, and described descending transmission channel processing unit is according to the H of described (M+1) individual CPE feedback jSinformation, calculates described (M+1) bar circuit transmission channel in the downstream direction.
In conjunction with the first mode in the cards of the third aspect, the third aspect, in the second mode in the cards, described signal transceiver sends the stage of O-P-SILENT signal or sends all superframes built in the stage of O-P-PILOT signal, the data symbol positions of down direction does not have signal, and send synchronizing symbol on the synchronizing symbol position of down direction.
In conjunction with the first possible implementation of the third aspect, the third aspect or the second mode in the cards of the third aspect, in the third mode in the cards, the synchronizing symbol on the synchronizing symbol in the superframe of the O-P-SILENT signal that described signal transceiver sends on (M+1) article circuit or O-P-PILOT signal and All other routes in superframe sends simultaneously.
In conjunction with the third aspect, the first possible implementation of the third aspect, the second mode in the cards of the third aspect or the third mode in the cards of the third aspect, in the 4th kind of mode in the cards, described network equipment also comprises side-play amount acquiring unit, described side-play amount acquiring unit is when receiving the superframe of R-P-SILENT signal, calculate on uplink synchronous symbol on this (M+1) article circuit and M article of circuit described in other uplink synchronous symbol offset amount, and this side-play amount is sent to described (M+1) individual CPE by described signal transceiver.
Fourth aspect, a kind of user side equipment is provided, described user side equipment is connected with CO by (M+1) article circuit, and described (M+1) article circuit and other M article circuit be connected with described CO form crosstalk, and described user side equipment comprises signal transceiver and descending transmission channel computing unit;
Described signal transceiver receives the O-P-SILENT signal of CO transmission or the superframe of O-P-PILOT signal, in the data symbol positions of down direction, there is no signal in the superframe of wherein said O-P-SILENT signal or O-P-PILOT signal, and on the synchronizing symbol position of down direction, carry synchronizing symbol; Described descending transmission channel computing unit according to the synchronizing symbol information on the synchronizing symbol position of described down direction, calculate in the downstream direction described (M+1) article circuit to the crosstalk channels of described M article circuit, i.e. H jS;
Described signal transceiver sends the superframe of R-P-SILENT signal to described CO, and the superframe of wherein said R-P-SILENT signal without any signal, and the synchronizing symbol position of up direction carries synchronizing symbol in the data symbol positions of up direction; Synchronizing symbol information on the synchronizing symbol position of described up direction is for calculating the transmission channel on whole on up direction (M+1) bar circuit; Crosstalk when transmission channel on whole on described up direction (M+1) bar circuit is for eliminating transfer of data in the upstream direction between whole (M+1) bar circuit;
Described signal transceiver sends the superframe of R-ERROR-SAMPLE signal to described CO, in the superframe of wherein said R-ERROR-SAMPLE signal in the data symbol positions of up direction carry data information, described data message comprises described H jS.
In the first possible implementation of fourth aspect, the all superframes built in the stage that described signal transceiver 902 sends R-P-SILENT signal without any signal, and the synchronizing symbol position of up direction carry synchronizing symbol in the data symbol positions of up direction.
In conjunction with the first mode in the cards of fourth aspect, fourth aspect, in the second mode in the cards, described signal transceiver is before the superframe sending R-P-SILENT signal, send the superframe of R-P-QUIET signal to described CO, but on the data symbol of up direction and synchronizing symbol position, do not send signal in the superframe of described R-P-QUIET signal.
In conjunction with the first possible implementation of fourth aspect, fourth aspect or the second mode in the cards of fourth aspect, in the third mode in the cards, described signal transceiver 902 sends all superframes carry data information in the data symbol positions of up direction built in the stage of R-ERROR-SAMPLE signal.
In conjunction with fourth aspect, the first possible implementation of fourth aspect, the second mode in the cards of fourth aspect or the third mode in the cards of fourth aspect, in the 4th kind of mode in the cards, described user side equipment also comprises side-play amount acquiring unit, described side-play amount acquiring unit receives the synchronizing symbol side-play amount that CO is carried by short message, according to described synchronizing symbol side-play amount, the transmission position of the synchronizing symbol in the superframe of mobile R-P-SILENT signal, make synchronizing symbol on (M+1) article circuit reach CO with the synchronizing symbol on M article of circuit described in other simultaneously.
5th aspect, provides a kind of network system, and described system comprises above-mentioned network equipment and multiple above-mentioned user side equipment, and described network equipment respectively by many circuits is established and is connected in described multiple user side.
Utilize the present embodiment, utilize the present embodiment, first obtain the transmission channel on up direction on all circuits, the crosstalk produced during to eliminate transfer of data on all circuit up directions; So just can ensure after the backward channel setting up up Error Sample, up direction do not have crosstalk, crosstalk channels on the data symbol that just can send to CO at CPE on bearing downlink direction, crosstalk channels information on the down direction that CO just can feed back according to CPE, calculate the transmission channel on line downstream direction, thus the crosstalk of acquisition downlink precoding (Precode) coefficient matrix to down direction is eliminated.And no matter be up direction or down direction in this process, before there is no coefficient matrix (Cancellation coefficient matrix and Precode coefficient matrix), all do not have the data symbol positions on correspondence direction sends data message.Therefore business between CO and CPE is not affected, reduce new line to greatest extent and add business datum is affected.
Accompanying drawing explanation
Fig. 1 is DSLAM synchronized transmission and the synchronous schematic diagram received in DSL framework;
Fig. 2 is the tdd frame structure of signal transmission in DSL line;
Fig. 3 is the superframe structure of signal transmission in DSL line;
Fig. 4 is a kind of circuit initial method flow chart of the embodiment of the present invention;
Fig. 5 is the another kind of circuit initial method flow chart of the embodiment of the present invention;
Fig. 6 is CO and the CPE signal transmission phase figure of the embodiment of the present invention;
Fig. 7 is the another kind of circuit initial method flow chart of the embodiment of the present invention;
Fig. 8 is a kind of network equipment structural representation of the embodiment of the present invention;
Fig. 9 is a kind of user side equipment structural representation of the embodiment of the present invention;
Figure 10 is a kind of system composition schematic diagram of the embodiment of the present invention;
Figure 11 is a kind of network components structural representation of the embodiment of the present invention.
Embodiment
For making the object of the embodiment of the present invention, technical scheme and advantage clearly, below in conjunction with the accompanying drawing in the embodiment of the present invention, technical scheme in the embodiment of the present invention is clearly and completely described, obviously, described embodiment is the present invention's part embodiment, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, belong to the scope of protection of the invention.
In the DSL framework shown in Fig. 1, network equipment (CO) and each user side equipment (CustomerPremise Equipment, CPE) comprise transmitting element (Tx) and receiving element (Rx); At FTTD(Fiber To The Distribution point) deployment scenario under, the function of network equipment CO can move to distributing point (distribution point, DP).DP point arrives on many circuits of multiple CPE of user family, and when being in Showtime stage, in circuit, the transmission of signal adopts the TDD(TimeDivision Duple shown in Fig. 2 and 3, time division duplex) frame structure and superframe structure.Wherein each tdd frame defines up-downgoing and to transmit and receive data the time slot of symbol (Data Symbol), first DMT(Discrete Multi-Tone of descending sending direction in each superframe, Discrete multi-tone) symbol is exactly the synchronizing symbol (Sync Symbol) of descending sending direction, and first DMT symbol of up sending direction is exactly the synchronizing symbol of up sending direction.Such as, can being made up of 36 DMT of a tdd frame, so TF equals 36 DMT; A superframe can be made up of 8 tdd frames; First DMT symbol of first tdd frame in this superframe is exactly the synchronizing symbol of descending sending direction, if about 0.75 millisecond of the time duration of a tdd frame, the time duration of a superframe is approximately 6 milliseconds.
In the embodiment of the present invention, circuit initial phase adopts the tdd frame structure identical with the showtime stage and superframe structure, and Vector training signal can only send in the synchronizing symbol of superframe structure.Synchronizing symbol is generally made up of multiple audio frequency (tone), generally nearly 2048 tone, the sequence (Vector pilot sequence) comprising vector quantization training can be sent, clock recovery pilot tone (timing recovery), sync id (Sync Flag), short message (short message, short message generally only has several byte message) etc.Such as, the odd positions tone of synchronizing symbol is used for the tone of Vector training, the tone of even number position for sending sync id, clock recovery pilot tone, short message; More specifically, the index units of even number tone is 0,4,8 for sending SMS message, the index units of even number tone be 2,6 for sending sync id, exception, select two or three tone wherein and recover pilot tone for tranmitting data register.
The embodiment of the present invention provides a kind of circuit initial method, and as described in Figure 4, the method comprises:
Step 401:CPE receives the O-P-SILENT signal (the reticent signal of local side transceiver) of CO transmission or the superframe of O-P-PILOT signal (local side Transceiver Transmit pilot signal), the superframe of wherein said O-P-SILENT signal or O-P-PILOT signal does not have signal in the data symbol positions of down direction, and on the synchronizing symbol position of down direction, carry synchronizing symbol; The synchronizing symbol information that the synchronizing symbol position of described down direction carries calculates All other routes except the circuit at described CPE place to described CPE place circuit crosstalk channels in the downstream direction for described CPE, i.e. H jS; Described All other routes are the circuit that other CPE are connected with described CO;
Step 403: described CPE sends the superframe of R-P-SILENT signal (the reticent signal of remote transceiver) to described CO, the superframe of wherein said R-P-SILENT signal without any signal, and the synchronizing symbol position of up direction carries synchronizing symbol in the data symbol positions of up direction; Synchronizing symbol information on the synchronizing symbol position of described up direction is for calculating the transmission channel on up direction on all circuits; The crosstalk that transmission channel on described up direction on all circuits produces when described CO eliminates the transfer of data at up direction on all circuits;
Step 405: described CPE sends the superframe of R-ERROR-SAMPLE signal (remote transceiver feedback error pattern signal) to described CO, superframe carry data information in the data symbol positions of up direction of wherein said R-ERROR-SAMPLE signal, described data message comprises described H jS.
It should be noted that step 401 and step 403 do not have sequencing, the superframe that CPE sends R-P-SILENT signal or can carry out before CPE receives the O-P-SILENT signal of CO transmission or the superframe of O-P-PILOT signal afterwards to CO; Similarly, in subsequent embodiment, the superframe of the O-P-SILENT signal that CO sends or O-P-PILOT signal also can be carried out before or after the superframe that CO receives CPE transmission R-P-SILENT signal, carries out unifying explanation at this.
Utilize the present embodiment, first obtain the transmission channel on up direction on all circuits, the crosstalk produced during to eliminate transfer of data on all circuit up directions; So just can ensure after the backward channel setting up up Error Sample, up direction do not have crosstalk, crosstalk channels on the data symbol that just can send to CO at CPE on bearing downlink direction, crosstalk channels information on the down direction that CO just can feed back according to CPE, calculate the transmission channel on line downstream direction, thus the crosstalk of acquisition downlink precoding (Precode) coefficient matrix to down direction is eliminated.And no matter be up direction or down direction in this process, before there is no coefficient matrix (Cancellation coefficient matrix and Precode coefficient matrix), all do not have the data symbol positions on correspondence direction sends data message.Therefore business between CO and CPE is not affected, reduce new line to greatest extent and add business datum is affected.
Below in conjunction with concrete scene, the embodiment of the present invention provides another kind of circuit initial method, and described circuit is the circuit that CO is connected with multiple CPE.In this scenario, multiple CPE is connected with CO or Dp point by many circuits, wherein M bar circuit has entered the showtime stage, (M+1) article circuit that (M+1) individual CPE is corresponding newly adds fashionable, namely enter channel and find that (Channel-discovery) is after the stage, (M+1) article circuit that wherein (M+1) individual CPE is corresponding and other M articles of circuits form crosstalk; Be described from (M+1) individual cpe side, other M CPE is referred to as other CPE; Described M >=1; Described method as shown in Figure 5, comprising:
Step 501: described (M+1) individual CPE receives the O-P-SILENT signal of described CO transmission or the superframe of O-P-PILOT signal, as shown in Figure 6, the superframe of wherein said O-P-SILENT signal or O-P-PILOT signal does not have signal in the data symbol positions of down direction, and on the synchronizing symbol position of down direction, carry synchronizing symbol; According to the synchronizing symbol information of superframe on the synchronizing symbol position of down direction of described O-P-SILENT signal or O-P-PILOT signal, calculate described (M+1) article circuit in the downstream direction to the crosstalk channels of described M article of circuit being in the showtime stage, i.e. H jS.
Further, described CO sends the stage of O-P-SILENT signal or sends all superframes built in the stage of O-P-PILOT signal, the data symbol positions of down direction does not have signal, and send synchronizing symbol on the synchronizing symbol position of down direction.
The synchronizing symbol packets of information sent on synchronizing symbol due to the superframe of O-P-SILENT signal or O-P-PILOT signal is containing Vector pilot frequency sequence, after CPE receives the superframe of this O-P-SILENT signal, just can calculate and newly add lambda line and above-mentioned (M+1) article circuit in the downstream direction to the crosstalk channels of M article of circuit being in the showtime stage.The account form obtaining circuit crosstalk channels according to Vector pilot frequency sequence is prior art, does not carry out deep description here.
It should be noted that, described channel discovery phase ITU-T standard G.994.1 in regulation handshake phase (Handshake) process after channel discovery phase, channel discovery phase includes several signal phase, the stage (also referred to as O-P-PILOT signal phase) such as sending O-P-PILOT signal is exactly one of them, the superframe of O-P-PILOT signal phase mainly sends O-P-PILOT signal, also may send special symbol in special position, such as, when superframe starts, send synchronizing symbol.
Step 503: described (M+1) individual CPE sends the superframe of R-P-SILENT signal to described CO, the superframe of wherein said R-P-SILENT signal without any signal, and the synchronizing symbol position of up direction carries synchronizing symbol in the data symbol positions of up direction; Synchronizing symbol information on the synchronizing symbol position of described up direction is for calculating the transmission channel on whole on up direction (M+1) bar circuit; Crosstalk when transmission channel on whole on described up direction (M+1) bar circuit is for eliminating transfer of data in the upstream direction between whole (M+1) bar circuit.
Further, described (M+1) individual CPE sends all superframes of building in the stage of R-P-SILENT signal without any signal in the data symbol positions of up direction, and the synchronizing symbol position of up direction carries synchronizing symbol.
The superframe of the R-P-SILENT signal sent due to the described CPE synchronizing symbol packets of information on synchronizing symbol position is containing Vector pilot frequency sequence, after CO receives the superframe of this R-P-SILENT signal, just can calculate up direction is in the showtime stage M article of circuit to the crosstalk channels newly adding lambda line and above-mentioned (M+1) article circuit.
And in the upstream direction, newly add the crosstalk channels of lambda line to the M bar circuit being in the showtime stage to be obtained by the CPE feedback on All other routes, be in the M bar circuit oneself in showtime stage to the crosstalk channels of oneself, and newly add the crosstalk channels of lambda line oneself to oneself and all easily obtain; So CO above-mentioned measure up direction newly adds lambda line to the crosstalk channels of M bar circuit being in the showtime stage after, just can obtain the transmission channel on whole on up direction (M+1) bar circuit, and then eliminate the crosstalk on up direction.
Due to according to the handshake process G.994.1 specified, before the superframe of the R-P-SILENT signal sent, need the superframe sending R-P-QUIET signal (the quiet signal of remote transceiver); So, further, this step also comprises in step 503-1(accompanying drawing not to be had to indicate): before the superframe sending R-P-SILENT signal, described (M+1) individual CPE sends the superframe of R-P-QUIET signal to described CO, but the stage interior all superframes built that described (M+1) CPE sends R-P-QUIET signal do not send signal on the data symbol and synchronizing symbol position of up direction; Namely the superframe of described R-P-QUIET signal is equivalent to sky frame.
Step 505: described (M+1) individual CPE sends the superframe of R-ERROR-SAMPLE signal to described CO, superframe carry data information in the data symbol positions of up direction of wherein said R-ERROR-SAMPLE signal, described data message comprises the described M article of circuit in the showtime stage that is in of down direction to the crosstalk channels of (M+1) article circuit, i.e. H jS.Described H jSinformation is used for CO and calculates described (M+1) bar circuit transmission channel in the downstream direction.
Further, CPE sends all superframes carry data information in the data symbol positions of up direction built in the stage of R-ERROR-SAMPLE signal.
Further, when CPE sends the superframe of R-P-SILENT signal in step 503, CO measures the uplink synchronous symbol offset amount of uplink synchronous symbol on described M article of circuit and described M article, and sends to described (M+1) individual CPE.(M+1) individual CPE receives the synchronizing symbol side-play amount that CO is carried by short message, according to described synchronizing symbol side-play amount, the transmission position of the synchronizing symbol in the superframe of mobile R-P-SILENT signal, makes the synchronizing symbol on (M+1) article circuit and other synchronizing symbols be on the M article of circuit in showtime stage reach CO simultaneously.
Utilize the present embodiment, first obtain up crosstalk counteracting (Cancellation) coefficient matrix on described (M+1) bar circuit, set up the backward channel of up Error Sample, so just can when ensureing up direction there is no crosstalk, the data symbol sent to CO bearing downlink direction is in the described M article of circuit in showtime stage to the crosstalk channels of (M+1) article circuit newly added, crosstalk channels information on the down direction that CO just can feed back according to CPE, calculate the transmission channel on described (M+1) bar circuit, thus the crosstalk of acquisition downlink precoding (Precode) coefficient matrix to down direction is eliminated.And no matter be up direction or down direction in this process, before there is no coefficient matrix (Cancellation coefficient matrix and Precode coefficient matrix), all do not have the data symbol positions on correspondence direction sends data message.Therefore the business of the showtime of being in phase user all between CO and CPE is not affected, reduce to greatest extent new line add on be in the showtime stage business datum impact.
The embodiment of the present invention also provides a kind of circuit initial method, described circuit is just the circuit that CO is connected with multiple CPE, wherein M bar circuit has entered the showtime stage, (M+1) article circuit that (M+1) individual CPE is corresponding newly adds fashionable, namely enter channel and find that (Channel-discovery) is after the stage, be described from CO side, as shown in Figure 7, described method comprises:
Step 701: the superframe that described CO sends O-P-SILENT signal or O-P-PILOT signal is to described (M+1) individual CPE corresponding to described (M+1) article circuit, the superframe of wherein said O-P-SILENT signal or O-P-PILOT signal does not have signal in the data symbol positions of down direction, and on the synchronizing symbol position of down direction, carry synchronizing symbol;
Synchronizing symbol information on the synchronizing symbol position of described down direction can be used for calculating the described M article of circuit being in the showtime stage in the downstream direction to described (M+1) article circuit crosstalk channels, i.e. H jS.
Further, CO sends the stage of O-P-SILENT signal or sends all superframes built in the stage of O-P-PILOT signal, the data symbol positions of down direction does not have signal, and send synchronizing symbol on the synchronizing symbol position of down direction.
Further, the synchronizing symbol on the synchronizing symbol in the superframe of the O-P-SILENT signal that sends on (M+1) article circuit of described CO or O-P-PILOT signal and All other routes in superframe sends simultaneously.
Step 703: described CO receives the superframe of the R-P-SILENT signal that described (M+1) individual CPE sends, the superframe of wherein said R-P-SILENT signal without any signal, and the synchronizing symbol position of up direction carries synchronizing symbol in the data symbol positions of up direction; Described CO calculates the transmission channel on up direction on whole (M+1) bar circuit according to the synchronizing symbol information of the superframe of the described R-P-SILENT signal received on synchronizing symbol position, the crosstalk that the transmission channel on described up direction on (M+1) bar circuit can produce when described CO eliminates the transfer of data at up direction on all (M+1) bar circuits.
Further, CPE sends all superframes of building in the stage of R-P-SILENT signal without any signal in the data symbol positions of up direction, and the synchronizing symbol position of up direction carries synchronizing symbol.
Further this step also comprises in step 703-1(accompanying drawing does not have to indicate): before the superframe receiving R-P-SILENT signal, described CO receives the superframe of the R-P-QUIET signal that described (M+1) individual CPE sends, and wherein said (M+1) CPE sends all superframes of building in the stage of R-P-QUIET signal not carrying signal on the data symbol and synchronizing symbol position of up direction.
Step 705: described CO receives the superframe of the R-ERROR-SAMPLE signal that (M+1) individual CPE sends, superframe carry data information in the data symbol positions of up direction of wherein said R-ERROR-SAMPLE signal, described data message comprises the described M article of circuit in the showtime stage that is in of down direction to the crosstalk channels of (M+1) article circuit, i.e. H jS.
Further, CPE sends all superframes carry data information in the data symbol positions of up direction built in the stage of R-ERROR-SAMPLE signal.
Further, the method for the present embodiment comprises further, step 707: described CO is according to the H of described (M+1) individual CPE feedback jSinformation, calculates described (M+1) bar circuit transmission channel in the downstream direction.
Described CO obtains the H of described (M+1) individual CPE feedback jSafter information, in conjunction with and the down direction that obtained on H sSand H sJ(H sSobtain manner be prior art, be not described here; H sJthe information acquisition of CO can be reported from All other routes), just can calculate described whole (M+1) bar circuit transmission channel in the downstream direction.
Further, when CO in above-mentioned steps 703 receives the superframe of the R-P-SILENT signal that described (M+1) individual CPE sends, CO measures the uplink synchronous symbol offset amount of uplink synchronous symbol on described M article of circuit and described M article, and sends to described (M+1) individual CPE.Described (M+1) individual CPE receives the synchronizing symbol side-play amount that CO is carried by short message, can according to this side-play amount, the transmission position of the synchronizing symbol in the superframe of mobile R-P-SILENT signal, makes the synchronizing symbol on (M+1) article circuit and other synchronizing symbols be on the M article of circuit in showtime stage reach CO simultaneously.
Utilize the present embodiment, first obtain up crosstalk counteracting (Cancellation) coefficient matrix on described (M+1) bar circuit, so just can when ensureing up direction there is no crosstalk, the data symbol that CO receives carries down direction is in the showtime stage described M article of circuit to the crosstalk channels of (M+1) article circuit newly added, crosstalk channels information on the down direction that CO just can feed back according to CPE, calculate the transmission channel on described (M+1) bar circuit, thus the crosstalk of acquisition downlink precoding (Precode) coefficient matrix to down direction is eliminated.
The embodiment of the present invention also provides a kind of network equipment 800, and described network equipment 800 is at least connected with (M+1) individual CPE by (M+1) article circuit; Described (M+1) article circuit and other M articles of circuits form crosstalk, and as shown in Figure 8, described network equipment 800 comprises signal transceiver 802 and uplink transport channel processing unit 804;
Described signal transceiver 802 sends the superframe of O-P-SILENT signal or O-P-PILOT signal to described (M+1) individual CPE, the superframe of wherein said O-P-SILENT signal or O-P-PILOT signal does not have signal in the data symbol positions of down direction, and on the synchronizing symbol position of down direction, carry synchronizing symbol;
Described signal transceiver 802 receives the superframe of the R-P-SILENT signal that described (M+1) individual CPE sends, the superframe of wherein said R-P-SILENT signal without any signal, and the synchronizing symbol position of up direction carries synchronizing symbol in the data symbol positions of up direction;
Described uplink transport channel processing unit 804 calculates the transmission channel on up direction on all circuits according to the synchronizing symbol information in the superframe of the described R-P-SILENT signal received on synchronizing symbol position, and eliminates the crosstalk that all (M+1) bar circuits produce when the transfer of data of up direction according to the transmission channel on (M+1) bar circuit on the described up direction calculated.
Described signal transceiver 802 receives the superframe of the R-ERROR-SAMPLE signal that (M+1) individual CPE sends, in the superframe of wherein said R-ERROR-SAMPLE signal in the data symbol positions of up direction carry data information, described data message comprises the described M article of circuit in the showtime stage that is in of down direction to the crosstalk channels of (M+1) article circuit, i.e. H jS.
Further, described signal transceiver 802 sends the stage of O-P-SILENT signal or sends all superframes built in the stage of O-P-PILOT signal, the data symbol positions of down direction does not have signal, and send synchronizing symbol on the synchronizing symbol position of down direction.
Also further, the synchronizing symbol on the synchronizing symbol in the superframe of the O-P-SILENT signal that sends on (M+1) article circuit of described signal transceiver 802 or O-P-PILOT signal and All other routes in superframe sends simultaneously.
Further, described signal transceiver 802 receives the superframe of the R-P-QUIET signal that described (M+1) individual CPE sends, in the superframe of wherein said R-P-QUIET signal on the data symbol of up direction and synchronizing symbol position not carrying signals.
Further, described network equipment 800 also comprises descending transmission channel processing unit 806, and described descending transmission channel processing unit 806 is according to the H of described (M+1) individual CPE feedback jSinformation, calculates described (M+1) bar circuit transmission channel in the downstream direction.Particularly, described descending transmission channel processing unit 806 is according to the H obtaining described (M+1) individual CPE feedback jSafter information, in conjunction with and the down direction that obtained on H sSand H sJ, just can calculate described whole (M+1) bar circuit transmission channel in the downstream direction.
Further, described network equipment 800 also comprises side-play amount acquiring unit 808, described side-play amount acquiring unit 808 is when receiving the superframe of R-P-SILENT signal, measure the uplink synchronous symbol offset amount of uplink synchronous symbol on described M article of circuit and described M article, and this side-play amount is sent to described (M+1) individual CPE by described signal transceiver 802.Specifically can be notified by short message.
What needs further illustrated is, concrete action performed by signal transceiver 802 in described network equipment, uplink transport channel processing unit 804 and descending transmission channel processing unit 806 is exactly the method above in embodiment of the method, and concrete steps repeat no more.
The embodiment of the present invention also provides a kind of user side equipment 900, described user side equipment is connected with CO by (M+1) article circuit, described (M+1) article circuit and other M article circuit be connected with described CO form crosstalk, as shown in Figure 9, signal transceiver 902, descending transmission channel computing unit 904 is comprised;
Described signal transceiver 902 receives the O-P-SILENT signal of CO transmission or the superframe of O-P-PILOT signal, in the data symbol positions of down direction, there is no signal in the superframe of wherein said O-P-SILENT signal or O-P-PILOT signal, and on the synchronizing symbol position of down direction, carry synchronizing symbol; And according to the synchronizing symbol information on the synchronizing symbol position of described down direction, calculate described (M+1) article circuit in the downstream direction to the crosstalk channels of described M article of circuit being in the showtime stage, i.e. H jS;
Described signal transceiver 902 sends the superframe of R-P-SILENT signal to described CO, and the superframe of wherein said R-P-SILENT signal without any signal, and the synchronizing symbol position of up direction carries synchronizing symbol in the data symbol positions of up direction; Synchronizing symbol information on the synchronizing symbol position of described up direction is for calculating the transmission channel on whole on up direction (M+1) bar circuit; Crosstalk when transmission channel on whole on described up direction (M+1) bar circuit is for eliminating transfer of data in the upstream direction between whole (M+1) bar circuit;
Described signal transceiver 902 sends the superframe of R-ERROR-SAMPLE signal to described CO, in the superframe of wherein said R-ERROR-SAMPLE signal in the data symbol positions of up direction carry data information, described data message comprises the described M article of circuit in the showtime stage that is in of down direction to the crosstalk channels of (M+1) article circuit, i.e. H jS.Described H jSinformation is used for CO and calculates described (M+1) bar circuit transmission channel in the downstream direction.
Further, all superframes built in the stage that described signal transceiver 902 sends R-P-SILENT signal without any signal, and the synchronizing symbol position of up direction carry synchronizing symbol in the data symbol positions of up direction;
Further, described signal transceiver 902 is before the superframe sending R-P-SILENT signal, send the superframe of R-P-QUIET signal to described CO, but on the data symbol of up direction and synchronizing symbol position, do not send signal in the superframe of described R-P-QUIET signal;
Also further, described signal transceiver 902 sends all superframes carry data information in the data symbol positions of up direction built in the stage of R-ERROR-SAMPLE signal.
Further, described user side equipment 900 also comprises side-play amount acquiring unit 906, described side-play amount acquiring unit 906 receives the synchronizing symbol side-play amount that CO is carried by short message, according to described synchronizing symbol side-play amount, the transmission position of the synchronizing symbol in the superframe of mobile R-P-SILENT signal, makes synchronizing symbol and other synchronizing symbols be on the M article of circuit in showtime stage on (M+1) article circuit reach CO simultaneously.
Need to further illustrate, the signal transceiver 902 in described user side equipment and the concrete action performed by descending transmission channel computing unit 904 are exactly the method above in embodiment of the method, and concrete steps repeat no more.
The embodiment of the present invention also provides a kind of network system 1000, described system comprises network equipment 1001 and multiple user side equipment 1003, described network equipment 1001 respectively by many circuits 1005 is established and is connected in multiple user side, as N bar, M bar circuit wherein has entered the showtime stage, 1<M<N.
Described network equipment 1001 is exactly the network equipment 800 in foregoing embodiments, and user side equipment 1002 is exactly the user side equipment 900 in foregoing embodiments.
Need to further illustrate, described network equipment 1001 and the concrete action performed by user side equipment 1003 are exactly the method above in embodiment of the method, and concrete steps repeat no more.
One of ordinary skill in the art will appreciate that: all or part of step realizing said method embodiment can have been come by the hardware that program command is relevant, aforesaid program can be stored in a computer read/write memory medium, this program, when performing, performs the step comprising said method embodiment; And aforesaid storage medium comprises: ROM, RAM, magnetic disc or CD etc. various can be program code stored medium.Be specially above-described network processes process to implement on the universal component of the computer or network components such as with enough disposal abilities, memory resource and network throughput capability.Figure 11 schematically shows the electrical general-purpose network component 1100 of the one or more embodiments being suitable for implementing parts disclosed herein.This network components 1100 comprises processor 1102 (can be called as CPU or CPU), this processor 1102 with comprise second memory 1104, read-only memory (ROM) 1106, easy assess memorizer (RAM) 1108, I/O (I/O) equipment 1110 communicates with the memory devices of network connectivity devices 1112.This processor 1102 can be implemented as one or more cpu chip, or is implemented as a part for one or more application-specific integrated circuit (ASIC).
This second memory 1104 is typically made up of one or more disk drive or dish driver, and for the non-volatile memories of data, and if RAM1108 do not reach and be enough to hold all working data, be used as overflow data memory device.Second memory 1104 can be used for storing those are loaded into RAM1108 program when being selected for execution.ROM1106 is used to store instruction and or the data that read program the term of execution.ROM1106 is a kind of non-volatile memory devices, and it typically has the memory span less compared with large memories capacity relative to second memory 1104.RAM1108 is used for stores volatile data, and may store instruction.Fast to the access of the access of ROM1106 and RAM1108 usual comparison second memory 1104.
Last it is noted that above each embodiment is only in order to illustrate technical scheme of the present invention, be not intended to limit; Although with reference to foregoing embodiments to invention has been detailed description, those of ordinary skill in the art is to be understood that: it still can be modified to the technical scheme described in foregoing embodiments, or carries out equivalent replacement to wherein some or all of technical characteristic; And these amendments or replacement, do not make the essence of appropriate technical solution depart from the scope of various embodiments of the present invention technical scheme.

Claims (21)

1. a circuit initial method, is characterized in that, described method comprises:
User side equipment CPE receives the reticent O-P-SILENT signal of local side transceiver of network equipment CO transmission or the superframe of local side Transceiver Transmit guiding O-P-PILOT signal, the superframe of wherein said O-P-SILENT signal or O-P-PILOT signal does not have signal in the data symbol positions of down direction, and on the synchronizing symbol position of down direction, carry synchronizing symbol; The synchronizing symbol information that the synchronizing symbol position of described down direction carries calculates All other routes to described CPE place circuit crosstalk channels in the downstream direction for described CPE, i.e. H jS; Described All other routes are the circuit that other CPE are connected with described CO;
Described CPE sends the superframe of the reticent R-P-SILENT signal of remote transceiver to described CO, the superframe of wherein said R-P-SILENT signal without any signal, and the synchronizing symbol position of up direction carries synchronizing symbol in the data symbol positions of up direction; Synchronizing symbol information on the synchronizing symbol position of described up direction is for calculating the transmission channel on up direction on all circuits; The crosstalk that transmission channel on described up direction on all circuits produces when described CO to eliminate on all circuits in up direction transfer of data;
Described CPE sends the superframe of remote transceiver feedback error pattern R-ERROR-SAMPLE signal to described CO, and superframe carry data information in the data symbol positions of up direction of wherein said R-ERROR-SAMPLE signal, described data message comprises described H jS.
2. the method for claim 1, it is characterized in that, described CPE sends all superframes of building in the stage of R-P-SILENT signal without any signal in the data symbol positions of up direction, and carries synchronizing symbol on the synchronizing symbol position of up direction.
3. method as claimed in claim 2, it is characterized in that, before the superframe sending R-P-SILENT signal, described CPE sends the superframe of the quiet R-P-QUIET signal of remote transceiver to described CO, but the stage interior all superframes built that described CPE sends R-P-QUIET signal do not send signal on the data symbol and synchronizing symbol position of up direction.
4. the method as described in claim 1,2 or 3, is characterized in that, described CPE sends all superframes carry data information in the data symbol positions of up direction built in the stage of R-ERROR-SAMPLE signal.
5. method as claimed in claim 4, it is characterized in that, described CPE receives the synchronizing symbol side-play amount that CO is carried by short message, according to described synchronizing symbol side-play amount, the transmission position of the synchronizing symbol in the superframe of mobile R-P-SILENT signal, make described CPE synchronizing symbol on synchronizing symbol on the line and All other routes reach CO simultaneously.
6. a circuit initial method, described circuit is many circuits that network equipment CO is connected with multiple user side equipment CPE, and (M+1) article circuit that wherein (M+1) individual CPE is corresponding and other M articles of circuits form crosstalk, M >=1; It is characterized in that, described method comprises:
Described CO sends the reticent O-P-SILENT signal of local side transceiver or local side Transceiver Transmit and guides the superframe of O-P-PILOT signal to described (M+1) individual CPE corresponding to described (M+1) article circuit, the superframe of wherein said O-P-SILENT signal or O-P-PILOT signal does not have signal in the data symbol positions of down direction, and on the synchronizing symbol position of down direction, carry synchronizing symbol; Synchronizing symbol information on the synchronizing symbol position of described down direction be used for calculating in the downstream direction described M article circuit to the crosstalk channels of described (M+1) article circuit, i.e. H jS;
Described CO receives the superframe of the reticent R-P-SILENT signal of remote transceiver that described (M+1) individual CPE sends, the superframe of wherein said R-P-SILENT signal without any signal, and the synchronizing symbol position of up direction carries synchronizing symbol in the data symbol positions of up direction; Described CO calculates the transmission channel on up direction on whole (M+1) bar circuit according to the synchronizing symbol information of the superframe of the described R-P-SILENT signal received on synchronizing symbol position, the crosstalk that the transmission channel on described up direction on (M+1) bar circuit produces when described CO eliminates the transfer of data at up direction on all (M+1) bar circuits;
Described CO receives the superframe of the remote transceiver feedback error pattern R-ERROR-SAMPLE signal that (M+1) individual CPE sends, superframe carry data information in the data symbol positions of up direction of wherein said R-ERROR-SAMPLE signal, described data message comprises described H jS.
7. method as claimed in claim 6, it is characterized in that, described method comprises further, and described CO is according to the H of described (M+1) individual CPE feedback jSinformation, calculates described (M+1) bar circuit transmission channel in the downstream direction.
8. method as claimed in claims 6 or 7, it is characterized in that, described CO sends the stage of O-P-SILENT signal or sends all superframes built in the stage of O-P-PILOT signal, the data symbol positions of down direction does not have signal, and send synchronizing symbol on the synchronizing symbol position of down direction.
9. method as claimed in claim 8, it is characterized in that, the synchronizing symbol on the synchronizing symbol in the superframe of the O-P-SILENT signal that described CO sends on (M+1) article circuit or O-P-PILOT signal and All other routes in superframe sends simultaneously.
10. method as claimed in claim 8, it is characterized in that, when described CO receives the superframe of the R-P-SILENT signal that described (M+1) individual CPE sends, described CO measures the uplink synchronous symbol offset amount of uplink synchronous symbol on described M article of circuit and described M article and sends to described (M+1) individual CPE.
11. 1 kinds of network equipments 800, described network equipment 800 is at least connected with (M+1) individual CPE by (M+1) article circuit; Described (M+1) article circuit and other M articles of circuits form crosstalk, and it is characterized in that, described network equipment 800 comprises signal transceiver 802 and uplink transport channel processing unit 804;
Described signal transceiver 802 sends the reticent O-P-SILENT signal of local side transceiver or local side Transceiver Transmit guides the superframe of O-P-PILOT signal to described (M+1) individual CPE, the superframe of wherein said O-P-SILENT signal or O-P-PILOT signal does not have signal in the data symbol positions of down direction, and on the synchronizing symbol position of down direction, carry synchronizing symbol;
Described signal transceiver 802 receives the superframe of the reticent R-P-SILENT signal of remote transceiver that described (M+1) individual user side equipment CPE sends, the superframe of wherein said R-P-SILENT signal without any signal, and the synchronizing symbol position of up direction carries synchronizing symbol in the data symbol positions of up direction;
Described uplink transport channel processing unit 804 calculates the transmission channel on up direction on all circuits according to the synchronizing symbol information in the superframe of the described R-P-SILENT signal received on synchronizing symbol position, and eliminates the crosstalk that all (M+1) bar circuits produce when the transfer of data of up direction according to the transmission channel on (M+1) bar circuit on the described up direction calculated;
Described signal transceiver 802 receives the superframe of the remote transceiver feedback error pattern R-ERROR-SAMPLE signal that (M+1) individual CPE sends, in the superframe of wherein said R-ERROR-SAMPLE signal in the data symbol positions of up direction carry data information, described data message comprises described M article of circuit of down direction to the crosstalk channels of (M+1) article circuit, i.e. H jS.
12. network equipments 800 as claimed in claim 11, it is characterized in that, described network equipment 800 also comprises descending transmission channel processing unit 806, and described descending transmission channel processing unit 806 is according to the H of described (M+1) individual CPE feedback jSinformation, calculates described (M+1) bar circuit transmission channel in the downstream direction.
13. network equipments 800 as described in claim 11 or 12, it is characterized in that, described signal transceiver 802 sends the stage of O-P-SILENT signal or sends all superframes built in the stage of O-P-PILOT signal, the data symbol positions of down direction does not have signal, and send synchronizing symbol on the synchronizing symbol position of down direction.
14. network equipments 800 as claimed in claim 13, it is characterized in that, the synchronizing symbol on the synchronizing symbol in the superframe of the O-P-SILENT signal that described signal transceiver 802 sends on (M+1) article circuit or O-P-PILOT signal and All other routes in superframe sends simultaneously.
15. network equipments 800 as claimed in claim 13, it is characterized in that, described network equipment 800 also comprises side-play amount acquiring unit 808, described side-play amount acquiring unit 808 is when receiving the superframe of R-P-SILENT signal, calculate the uplink synchronous symbol on this (M+1) article circuit and the uplink synchronous symbol offset amount on M article of circuit described in other, and this side-play amount is sent to described (M+1) individual CPE by described signal transceiver 802.
16. 1 kinds of user side equipments 900, described user side equipment is connected with network equipment CO by (M+1) article circuit, described (M+1) article circuit and other M article circuit be connected with described CO form crosstalk, it is characterized in that, described user side equipment 900 comprises signal transceiver 902 and descending transmission channel computing unit 904;
Described signal transceiver 902 receives the reticent O-P-SILENT signal of local side transceiver of CO transmission or the superframe of local side Transceiver Transmit guiding O-P-PILOT signal, in the data symbol positions of down direction, there is no signal in the superframe of wherein said O-P-SILENT signal or O-P-PILOT signal, and on the synchronizing symbol position of down direction, carry synchronizing symbol; Described descending transmission channel computing unit 904 according to the synchronizing symbol information on the synchronizing symbol position of described down direction, calculate in the downstream direction described (M+1) article circuit to the crosstalk channels of described M article circuit, i.e. H jS;
Described signal transceiver 902 sends the superframe of the reticent R-P-SILENT signal of remote transceiver to described CO, the superframe of wherein said R-P-SILENT signal without any signal, and the synchronizing symbol position of up direction carries synchronizing symbol in the data symbol positions of up direction; Synchronizing symbol information on the synchronizing symbol position of described up direction is for calculating the transmission channel on whole on up direction (M+1) bar circuit; Crosstalk when transmission channel on whole on described up direction (M+1) bar circuit is for eliminating transfer of data in the upstream direction between whole (M+1) bar circuit;
Described signal transceiver 902 sends the superframe of remote transceiver feedback error pattern R-ERROR-SAMPLE signal to described CO, in the superframe of wherein said R-ERROR-SAMPLE signal in the data symbol positions of up direction carry data information, described data message comprises described H jS.
17. user side equipments 900 as claimed in claim 16, it is characterized in that, the all superframes built in the stage that described signal transceiver 902 sends R-P-SILENT signal without any signal, and the synchronizing symbol position of up direction carry synchronizing symbol in the data symbol positions of up direction.
18. user side equipments 900 as described in claim 16 or 17, it is characterized in that, described signal transceiver 902 is before the superframe sending R-P-SILENT signal, send the superframe of the quiet R-P-QUIET signal of remote transceiver to described CO, but on the data symbol of up direction and synchronizing symbol position, do not send signal in the superframe of described R-P-QUIET signal.
19. user side equipments 900 as claimed in claim 18, is characterized in that, described signal transceiver 902 sends all superframes carry data information in the data symbol positions of up direction built in the stage of R-ERROR-SAMPLE signal.
20. user side equipments 900 as claimed in claim 18, it is characterized in that, described user side equipment 900 also comprises side-play amount acquiring unit 906, described side-play amount acquiring unit 906 receives the synchronizing symbol side-play amount that CO is carried by short message, according to described synchronizing symbol side-play amount, the transmission position of the synchronizing symbol in the superframe of mobile R-P-SILENT signal, makes synchronizing symbol on (M+1) article circuit reach CO with the synchronizing symbol on M article of circuit described in other simultaneously.
21. 1 kinds of network systems 1000, it is characterized in that, described system comprises network equipment 800 as claimed in claim 11 and multiple user side equipment as claimed in claim 16 900, and described network equipment 800 is connected with described multiple user side equipment 900 respectively by many circuits 1005.
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