CN102257799A - Signal sending method, device and communication device used for measuring circuit - Google Patents

Abstract

The embodiment of the invention provides a signal sending method, device and a communication device used for measuring circuit. The method comprises the steps of: collecting framing parameters corresponding to signals transmitted on a plurality of activated xDSL circuits; calculating pulse noise protection parameters corresponding to each activated circuit according to the framing parameters, and determining sending interval of sending measuring signals and the number of the measuring signals sent in the sending interval according to the pulse noise protection parameters; and sending the number of the measuring signals to each activated circuit with the determined sending intervals. According to the embodiment of the invention, the measuring signals are sent at intervals such that the crosstalk generated by the measuring signals appear interruptedly, and therefore the characteristic that the xDSL technology supports pulse noise protection can be utilized to decrease the influence of the crosstalk to other circuits.

Description

The signaling method, device and the communication equipment that are used for measurement circuitry

Technical field

The present invention relates to data communication field, more specifically, relate to the signaling method, device and the communication equipment that are used for measurement circuitry.

Background technology

XDSL is the general designation to all DSL (Digital Subscriber Line, Digital Subscriber Line) technology, is a kind of twisted pair telephone that utilizes, i.e. the high speed data transfer technology transmitted of UTP (Unshielded Twist Pair, unshielded twisted pair).Except IDSL (based on ISDN (Integrated Services Digital Network, DSL) and SHDSL (Symmetric High-speed DSL integrated services digital network), symmetry high speed DSL) etc. outside the DSL of baseband transmission, the xDSL of passband transmission utilizes frequency multiplexing technique to make xDSL and POTS (Plain Old Telephone Service, Plain Old Telephone Service) coexists as with on a pair of twisted-pair feeder, wherein xDSL occupies high band, and POTS takies the following baseband portion of 4KHz.The xDSL of passband transmission adopts DMT (Discrete Multitone, Discrete multi-tone) modulation.The system that provides multichannel xDSL signal to insert is called DSLAM (DSL Access Multiplexer, DSL couple in multiplexer).

Along with the raising of the employed frequency band of xDSL technology, crosstalk, especially the cross-interference issue of high band shows to such an extent that become increasingly conspicuous.Crosstalk and be divided into " near-end cross (NEXT) " and " far-end cross talk (FEXT) " usually by characteristic.Because xDSL up-downgoing channel adopts frequency division multiplexing, General N EXT can not produce too big harm to systematic function.But FEXT can have a strong impact on the transmission performance of circuit.When there being the multichannel user all to require to open xDSL when professional in a bundle cable, can some line speeds be low because far-end cross talk (FEXT) makes, unstable properties even can not open etc., finally cause the line activation rate of DSLAM lower.That is to say that the user twisted-pair feeder not all in some office points can both normally be opened the xDSL business.And the circuit that can not open the xDSL business need carry out malfunction elimination or even thoroughly more bring the xDSL business of opening.These process need great amount of manpower and material resources, thus make operating cost of operator significantly improve.

In order in the xDSL system, to carry out route survey effectively, the technology of a kind of SELT of being called (Single Ended Loop Test, single ended line is measured) has been proposed, it comes circuit is measured, checked and fault location by automatic measurement means.

Yet in above-mentioned SELT technology, the SELT measuring-signal is generally in the spectral range than broad and directly sends continuously, thereby sending signal will crosstalk near circuit generation, and crosstalking produces error code with near circuit making, will go offline when serious.

Summary of the invention

The embodiment of the invention provides a kind of signaling method, device and communication equipment that is used for measurement circuitry, and what produce in the time of can reducing to send measuring-signal crosstalks to other users' influence.

An aspect according to the embodiment of the invention provides a kind of signaling method that is used for measurement circuitry, comprising: collect the framing parameter corresponding to the signal that transmits on the circuit in a plurality of xDSL circuits that activated; According to described framing parameter, calculate Impulse Noise Protection parameter corresponding to each circuit that has activated, the transmission that is identified for sending measuring-signal according to described Impulse Noise Protection parameter is at interval with in the quantity of the described measuring-signal that sends in sending at interval; With the determined measuring-signal that on each circuit that has activated, sends described quantity at interval that sends.

According to the embodiment of the invention on the other hand, provide a kind of sender unit that is used for measurement circuitry, having comprised: parameter collection unit is used for collecting the framing parameter of the signal that transmits on the circuit corresponding to a plurality of xDSL circuits that activated; Determining unit, be used for according to described framing parameter, calculating is corresponding to the Impulse Noise Protection parameter of each circuit that has activated, and the transmission that is identified for sending measuring-signal according to described Impulse Noise Protection parameter is at interval with in the quantity of the described measuring-signal that sends in sending at interval; The measurement data transmitting element is used for the determined measuring-signal that sends described quantity at interval on each circuit that has activated that sends.

According to the embodiment of the invention on the other hand, provide a kind of communication equipment, comprised the above-mentioned sender unit that is used for measuring-signal.

The transmission of the embodiment of the invention by being identified for sending measurement data according to pulse protection parameter is at interval and in the quantity of the described measuring-signal that sends in sending at interval; then with the determined measuring-signal that sends institute's quantification at interval that sends; can realize sending discontinuously measuring-signal, thereby can utilize the Impulse Noise Protection mechanism in the xDSL system to reduce the influence of crosstalking All other routes.

Description of drawings

In order to be illustrated more clearly in the technical scheme of the embodiment of the invention, to do to introduce simply to the accompanying drawing of required use in embodiment or the description of the Prior Art below, obviously, accompanying drawing in describing below only is some embodiments of the present invention, for those of ordinary skills, under the prerequisite of not paying creative work, can also obtain other accompanying drawing according to these accompanying drawings.

Fig. 1 is the schematic block diagram of application according to the system of the signaling method that is used for measurement circuitry of the embodiment of the invention;

Fig. 2 is the flow chart according to the signaling method that is used for measurement circuitry of the embodiment of the invention;

Fig. 3 determines to send the schematic diagram of detailed process at interval according to the Impulse Noise Protection parameter among Fig. 2;

Fig. 4 is the schematic diagram that the number of the symbol that code word diffuses in the signal that transmits on described each circuit that has activated of the basis among Fig. 3 determines to send detailed process at interval;

Fig. 5 determines schematic diagram in the detailed process of the quantity of the described measuring-signal that sends in sending at interval according to the Impulse Noise Protection parameter among Fig. 2;

Fig. 6 is the schematic block diagram according to the sender unit that is used for measurement circuitry of the embodiment of the invention.

Embodiment

Below in conjunction with the accompanying drawing in the embodiment of the invention, the technical scheme in the embodiment of the invention is clearly and completely described, obviously, described embodiment is a part of embodiment of the present invention, rather than whole embodiment.Based on the embodiment among the present invention, those of ordinary skills belong to the scope of protection of the invention not making the every other embodiment that is obtained under the creative work prerequisite.

The embodiment of the invention provides the signaling method that is used for measurement circuitry.Mode illustrates the system of the signaling method that is used for measurement circuitry that the application embodiment of the invention provides at first, by way of example.

Fig. 1 is the schematic block diagram of application according to the system 10 of the signaling method that is used for measurement circuitry of the embodiment of the invention.

With reference to figure 1, system 10 comprises DSLAM (DSL Access Multiplexer, DSL couple in multiplexer) 11, described DSLAM 11 comprise a plurality of port P1, P2 ..., P _n, each port in described a plurality of ports connects many circuit L ₁, L ₂..., L _nIn an end of a corresponding circuit.Described circuit L ₁, L ₂..., L _nIn the other end and a plurality of CPE (Customer Premises Equipment, subscriber terminal equipment) 12 of a corresponding circuit ₁, CPE 12 ₂..., CPE 12 _nIn a corresponding connection, wherein n represents natural number.In system 10, DSLAM 11 sends measuring-signal via corresponding ports, and described measuring-signal is transferred to corresponding C PE by corresponding circuit.

Although be described as be at the signaling method that is used for measurement circuitry that the application embodiment of the invention provides in the said system at this, but the embodiment of the invention is not limited thereto, for example, above-mentioned DSLAM 11 can be replaced by xTU-C (Transceiver Unit at the Central side is at the transceiver unit of central side).

The specific embodiment of the signaling method that is used for measurement circuitry that the embodiment of the invention is provided is described in detail below.

The signaling method that is used for measurement circuitry that the embodiment of the invention provides sends the SELT measuring-signal discontinuously; thereby make the interrupted appearance of crosstalking that the SELT measuring-signal produces; therefore, can utilize the characteristics of xDSL technical support Impulse Noise Protection to reduce the influence of crosstalking to All other routes.

Fig. 2 is the flow chart according to the signaling method that is used for measurement circuitry of the embodiment of the invention.

With reference to figure 2,, collect framing parameter corresponding to the signal that transmits on the circuit in a plurality of xDSL circuits that activated in step 201.

Particularly, before sending the SELT measuring-signal, at first determine the set of the circuit that has activated of the same DSLAM of connection: L ₁, L ₂..., L _i..., L _N, wherein i is the natural number more than or equal to 1, N is the number that connects the circuit that has activated of same DSLAM.Although be described as the set of the circuit that has activated of determining the same DSLAM of connection in the present embodiment, the embodiment of the invention is not limited thereto, and for example, can determine the set of the circuit that has activated of the two or more DSLAM of connection as required.

Collection is corresponding to the framing parameter of the signal that transmits on each circuit in set.To those skilled in the art, the method that is collected in the framing parameter of the signal that transmits on the circuit is known, therefore is not elaborated at this.

In addition, in the xDSL system, framing parameter is the parameter that is used to set up frame, for example, at VSDL (Very High Speed Digital Subscriber Line, Very-high-speed Digital Subscriber Line) in the system, described framing parameter comprises: interleave depth, at a RS (Reed-Solomon, Read-Solomon) the redundancy bytes number in the code word, the number of the interleaving block that in a RS piece, comprises, at each DMT (Discrete Multitone, Discrete multi-tone) number of the bit that comprises in the symbol, the size of interleaving block, length of a RS code word or the like (referring to ITU-T Recommendation G993.2, Very high speed digital subscriber line transceivers 2 (VSDL2)).Although mode has been enumerated above-mentioned framing parameter by way of example in the present embodiment, but the embodiment of the invention is not limited thereto, for example, except above-named parameter, the embodiment of the invention can also comprise other framing parameter, perhaps also can not comprise above-mentioned framing parameter, that is to say, can increase or reduce the framing parameter that is adopted as required.

In step 202; according to framing parameter; calculating is corresponding to the Impulse Noise Protection parameter of described each circuit that has activated, and the transmission that is identified for sending measuring-signal according to described Impulse Noise Protection parameter is Q and at the quantity P of the described measuring-signal that sends in sending at interval at interval.

In the xDSL system; the error correcting capability of the signal that transmits on the described Impulse Noise Protection parametric representation circuit; can utilize in a certain size the continuous symbol in signal the number of the symbol that can correct a mistake fully by error correcting code to represent (referring to ITU-T Recommendation G993.2, Very high speed digital subscriber line transceivers 2 (VSDL2)).

In actual applications, the NEXT signal that the SELT measuring-signal produces is smaller to the adjacent lines influence, therefore, can only calculate descending Impulse Noise Protection parameter.

Can calculate the Impulse Noise Protection parameter in several ways.For example, in the VDSL system, can calculate Impulse Noise Protection parameter I NP_no_erasure (i) according to following formula (1) corresponding to each circuit that has activated:

$\mathrm{INP}\_\mathrm{no}\_\mathrm{erasure}\left(i\right)=\frac{8\×D_p\left(i\right)\×\frac{R_p\left(i\right)}{2\×q_p\left(i\right)}}{L_p\left(i\right)}$

$=\frac{8\×D_p\left(i\right)\×\frac{R_p\left(i\right)}{2\×\frac{N_{{\mathrm{FEC}}_p}\left(i\right)}{I_p\left(i\right)}}}{L_p\left(i\right)}$

$=\frac{8\×(D_p\left(i\right)\×I_p\left(i\right))\×\left(\frac{R_p\left(i\right)}{2\×N_{{\mathrm{FEC}}_p}\left(i\right)}\right)}{L_p\left(i\right)}...\left(1\right),$

Wherein, i represents line number;

D _p(i) expression interleave depth;

R _p(i) be illustrated in a redundancy bytes number in the RS code word;

q _p(i) be illustrated in the number of the interleaving block that comprises in the RS piece;

L _p(i) be illustrated in the number of the bit that comprises in each DMT symbol;

I _p(i) size of expression interleaving block;

The length of a RS code word of expression.

In addition, in the xDSL communication system, in order to strengthen the antijamming capability of data to error burst, usually before transmission, use interleaving technology that a RS code word is diffused in a plurality of DMT symbols, for example, in the VDSL system, can calculate in the signal that on the circuit that each has activated, transmits the amount R S_Expend (i) of the symbol that a RS code word diffuses to according to following formula (2):

$\mathrm{RS}\_\mathrm{Expend}\left(i\right)=\frac{8\×I_p\left(i\right)\×D_p\left(i\right)}{L_p\left(i\right)}...\left(2\right),$

Wherein, i, the L in the formula (2) _p(i), I _p(i) and D _p(i) with formula (1) in identical, therefore no longer repeat specification.

With formula (2) substitution formula (1), can obtain following formula (3):

$\mathrm{INP}\_\mathrm{no}\_\mathrm{erasure}\left(i\right)=\mathrm{RS}\_\mathrm{Expend}\left(i\right)\×\left(\frac{R_p\left(i\right)}{2\×N_{{\mathrm{FEC}}_p}\left(i\right)}\right)...\left(3\right),$

In above-mentioned formula, INP_no_erasure (i) expression is corresponding to the Impulse Noise Protection parameter of the circuit i that has activated, and RS_Expend (i) is illustrated in the signal that the described circuit i that has activated goes up transmission the quantity of the symbol that a RS code word diffuses to, R _p(i)/2 represent the byte number that the RS code word can be corrected a mistake,

The length of a code word of expression; from as can be seen last; in the xDSL system; the Impulse Noise Protection parameter can be illustrated in the symbol that code word diffused to; when impulsive noise occurring and disturb, the number of the symbol that can correct a mistake fully by error correcting code, therefore; according to the Impulse Noise Protection parameter, the transmission that the number of the symbol that can diffuse to according to a code word is identified for sending measuring-signal at interval.At this, described transmission is represented by the number of symbol at interval, but the embodiment of the invention is not limited thereto, and for example, described transmission can be represented that also this can come to determine as required by time span at interval.

Fig. 3 determines to send the schematic diagram of detailed process at interval according to the Impulse Noise Protection parameter among Fig. 2.

With reference to figure 3,,, calculate in the signal on described each circuit that has activated, transmit the number of the symbol that a code word diffuses to according to framing parameter in step 301.As mentioned above, can carry out the calculating of step 301 according to formula (2).

In step 302, be identified for sending the transmission interval of measuring-signal according to described number.

Fig. 4 is the schematic diagram that the number of the symbol that code word diffuses in the signal that transmits on described each circuit that has activated of the basis among Fig. 3 determines to send detailed process at interval.

With reference to figure 4,, determine the maximum number RS_Expend_max in the middle of the number of the symbol that code word in the signal that transmits that calculates is diffused on the circuit that each has activated in step 401.

The process of above-mentioned definite maximum number RS_Expend_max can be expressed as:

Wherein, i represents line number, and N represents the number of the circuit that activated.

In step 402, will send the interval and be defined as more than or equal to described maximum number.

Above-mentioned definite process at interval that sends can be expressed as:

Q≥RS_Expend_max...(5)。

Fig. 5 determines schematic diagram in the detailed process of the quantity of the described measuring-signal that sends in sending at interval according to the Impulse Noise Protection parameter among Fig. 2.

With reference to figure 5, in step 501, determine the minimum pulse protection parameter I NP_no_erasure_min in the middle of the Impulse Noise Protection parameter that calculates, the process of above-mentioned definite minimum pulse protection parameter can be expressed as:

Wherein, i represents line number, and N represents the number of the circuit that activated.

In step 502, determine that whether INP_no_erasure_min is greater than 1, at INP_no_erasure_min greater than 1 o'clock, in step 503, the quantity P of the measuring-signal that will in sending Q at interval, send be defined as 1 and (INP_no_erasure_min-1) between value, be not more than at 1 o'clock at INP_no_erasure_min, in step 504, the quantity P of the measuring-signal that will send in sending interval Q is defined as 1.Above-mentionedly determine that the process of the quantity P of the measuring-signal that sends can be expressed as in sending Q at interval:

Although this be described as scope with described quantity P be defined as 1 and (minimum pulse protection parameter-1) between scope; but the embodiment of the invention is not limited thereto; for example; also the scope of described quantity P can be defined as 1 and minimum pulse protection parameter I NP_no_erasure_min between scope; perhaps also the scope of described quantity P can be defined as 1 with less than the scope between the value of (INP_no_erasure_min-1); aforesaid way can both be realized the embodiment of the invention, only is the performance difference that is reached.

Return Fig. 2,, on each circuit that has activated, send the measuring-signal of described quantity P with determined transmission interval Q in step 203.

In the present embodiment, sending at interval, Q can get fixed value, promptly send measuring-signal periodically, sending at interval, Q also can change, for example, transmission when sending for the first time is spaced apart Q1, and the transmission in follow-up transmission at interval can be different with Q1, as long as the described interval Q that sends drops within above-mentioned definite transmission span at interval.In addition, the quantity P of each measuring-signal that sends both can fix, and also can change, needed only quantity P and dropped within the scope of above-mentioned definite quantity forwarded.

As mentioned above; the signaling method that is used for measurement circuitry according to the embodiment of the invention; quantity forwarded is the SELT measuring-signal of P on the circuit that has activated in sending interval Q; and do not send other signals; therefore; for the circuit that has activated, be the crosstalking of data of P even in sending Q at interval, produce to quantity, also can eliminate the influence that these are crosstalked and produce by the Impulse Noise Protection mechanism of xDSL system fully.Therefore, compare with traditional SELT measuring technique, the method for the embodiment of the invention is more reliable.

Sender unit that is used for measurement circuitry that the embodiment of the invention is provided and the communication equipment that comprises described sender unit are described in detail below.

The sender unit that is used for measurement circuitry that the embodiment of the invention provides sends the SELT measuring-signal discontinuously; thereby make the interrupted appearance of crosstalking that the SELT measuring-signal produces; therefore, can utilize the characteristics of xDSL technical support Impulse Noise Protection to reduce the influence of crosstalking to All other routes.

Fig. 6 is the schematic block diagram according to the sender unit that is used for measurement circuitry 60 of the embodiment of the invention.

As shown in Figure 6, described sender unit 60 comprises parameter collection unit 61, determining unit 62 and measuring-signal transmitting element 63.

Parameter collection unit 61 is used for collecting the framing parameter of the signal that transmits on the circuit corresponding to a plurality of xDSL circuits that activated.Determining unit 62 is used for according to described framing parameter, calculates the Impulse Noise Protection parameter corresponding to the circuit of each activation, according to described Impulse Noise Protection parameter determine to send at interval and described send at interval in the quantity of measuring-signal of transmission.Measurement data transmitting element 63 is used for the determined measuring-signal that sends described quantity at interval on each circuit that has activated that sends.

Above can carrying out, the various piece of described sender unit 60,, repeats no more for avoiding repetition with reference to described each process of Fig. 2 to Fig. 5.

For example, according to the embodiment of the invention, determining unit 62 is according to the Impulse Noise Protection parameter, and the transmission that the number of the symbol that diffuses to according to code word in the signal that transmits on the circuit that each has activated is identified for sending measuring-signal at interval.

According to the embodiment of the invention, determining unit 62 is according to described framing parameter, calculates in the signal that transmits on the circuit that each has activated the number of the symbol that a code word diffuses to, and determines described transmission interval according to described number.

According to the embodiment of the invention, determining unit 62 is determined the maximum number in the middle of the number of the symbol that code word in the signal that transmits that calculates diffuses on the circuit that each has activated, described transmission is defined as at interval more than or equal to described maximum number.

According to the embodiment of the invention, determining unit 62 is determined the quantity of the measuring-signal of transmission in described transmission at interval according to following manner: the minimum pulse protection parameter in the middle of the pulse protection parameter of determining calculating; When described minimum pulse protection parameter is less than or equal to 1, described quantity is defined as 1, in described minimum pulse protection parameter greater than 1 o'clock, with described quantity be defined as 1 and (minimum pulse is protected parameter-1) between value.

According to the embodiment of the invention, determining unit 62 is calculated corresponding to the Impulse Noise Protection parameter of each circuit that has activated according to top formula (1) and (2) respectively and calculate in the signal that transmits the quantity of the symbol that a code word diffuses on the circuit that each has activated.

In addition, according to the embodiment of the invention, the above-mentioned sender unit that is used for measurement circuitry may be implemented as and covers communication equipment, described communication equipment includes but not limited to DSLAM, can as required the described sender unit that is used for measurement circuitry be covered other communication equipments.

The above; only be the specific embodiment of the present invention, but protection scope of the present invention is not limited thereto, anyly is familiar with those skilled in the art in the technical scope that the present invention discloses; can expect easily changing or replacing, all should be encompassed within protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion by described protection range with claim.

Claims (15)

1. a signaling method that is used for measurement circuitry is characterized in that, comprising:

Collection is corresponding to the framing parameter of the signal that transmits on the circuit in a plurality of xDSL circuits that activated;

According to described framing parameter, calculate Impulse Noise Protection parameter corresponding to each circuit that has activated, the transmission that is identified for sending measuring-signal according to described Impulse Noise Protection parameter is at interval with in the quantity of the described measuring-signal that sends in sending at interval;

With the determined measuring-signal that on each circuit that has activated, sends described quantity at interval that sends.

2. signaling method as claimed in claim 1; it is characterized in that; the transmission that is identified for sending described measuring-signal according to described Impulse Noise Protection parameter comprises at interval: according to described Impulse Noise Protection parameter, the transmission that the number of the symbol that diffuses to according to code word in the signal that transmits on described each circuit that has activated is identified for sending measuring-signal at interval.

3. signaling method as claimed in claim 2; it is characterized in that; according to described Impulse Noise Protection parameter, the transmission that the number of the symbol that diffuses to according to code word in the signal that transmits on described each circuit that has activated is identified for sending measuring-signal comprises at interval:

According to described framing parameter, calculate in the signal on described each circuit that has activated, transmit the number of the symbol that a code word diffuses to;

Be identified for sending the transmission interval of measuring-signal according to described number.

4. signaling method as claimed in claim 3 is characterized in that, the transmission that is identified for sending measuring-signal according to described number comprises at interval:

Determine the maximum number in the middle of the number of the symbol that code word in the signal that transmits that calculates diffuses on described each circuit that has activated;

Described transmission is defined as at interval more than or equal to described maximum number.

5. signaling method as claimed in claim 1 is characterized in that, determines to comprise in the described quantity that sends the measuring-signal that sends in the interval according to described Impulse Noise Protection parameter:

Determine the minimum pulse protection parameter in the middle of the pulse protection parameter that calculates;

When described minimum pulse protection parameter is less than or equal to 1, described quantity is defined as 1, in described minimum pulse protection parameter greater than 1 o'clock, with described quantity be defined as 1 and (minimum pulse is protected parameter-1) between value.

6. signaling method as claimed in claim 1; it is characterized in that the Impulse Noise Protection parameter of calculating corresponding to described each circuit that has activated comprises: calculate Impulse Noise Protection parameter I NP_no_erasure (i) corresponding to described each circuit that has activated according to following formula:

$\mathrm{INP}\_\mathrm{no}\_\mathrm{erasure}\left(i\right)=\frac{8\×D_p\left(i\right)\×\frac{R_p\left(i\right)}{2\×q_p\left(i\right)}}{L_p\left(i\right)}$

$=\frac{8\×D_p\left(i\right)\×\frac{R_p\left(i\right)}{2\×\frac{N_{{\mathrm{FEC}}_p}\left(i\right)}{I_p\left(i\right)}}}{L_p\left(i\right)}$

$=\frac{8\×(D_p\left(i\right)\×I_p\left(i\right))\×\left(\frac{R_p\left(i\right)}{2\×N_{{\mathrm{FEC}}_p}\left(i\right)}\right)}{L_p\left(i\right)},$

Wherein, i represents line number;

D _p(i) expression interleave depth;

R _p(i) be illustrated in a redundancy bytes number in the RS code word;

q _p(iz) be illustrated in the number of the interleaving block that comprises in the RS piece;

L _p(i) be illustrated in the number of the bit that comprises in each DMT symbol;

I _p(i) size of expression interleaving block;

The length of a RS code word of expression.

7. signaling method as claimed in claim 3, it is characterized in that the quantity of calculating in the signal transmit the symbol that a code word diffuses on described each circuit that has activated comprises: the amount R S_Expend (i) of the symbol that code word diffuses in the signal of determining according to following formula to transmit on described each circuit that has activated:

$\mathrm{RS}\_\mathrm{Expend}\left(i\right)=\frac{8\×I_p\left(i\right)\×D_p\left(i\right)}{L_p\left(i\right)},$

Wherein, i represents line number;

L _p(i) be illustrated in the number of the bit that comprises in each DMT symbol;

I _p(i) size of expression interleaving block;

D _p(i) expression interleave depth.

8. a sender unit that is used for measurement circuitry is characterized in that, comprising:

Parameter collection unit is used for collecting the framing parameter of the signal that transmits on the circuit corresponding to a plurality of xDSL circuits that activated;

Determining unit, be used for according to described framing parameter, calculating is corresponding to the Impulse Noise Protection parameter of each circuit that has activated, and the transmission that is identified for sending measuring-signal according to described Impulse Noise Protection parameter is at interval with in the quantity of the described measuring-signal that sends in sending at interval;

The measurement data transmitting element is used for the determined measuring-signal that sends described quantity at interval on each circuit that has activated that sends.

9. sender unit as claimed in claim 8; it is characterized in that; described determining unit is according to described Impulse Noise Protection parameter, and the number of the symbol that diffuses to according to code word in the signal that transmits on described each circuit that has activated is determined the described transmission interval that is used to send measuring-signal.

10. sender unit as claimed in claim 9, it is characterized in that, described determining unit is according to described framing parameter, calculates in the signal that transmits on described each circuit that has activated the number of the symbol that a code word diffuses to, and determines described transmission interval according to described number.

11. sender unit as claimed in claim 10, it is characterized in that, described determining unit is determined the maximum number in the middle of the number of the symbol that code word in the signal that transmits that calculates diffuses on described each circuit that has activated, described transmission is defined as at interval more than or equal to described maximum number.

12. sender unit as claimed in claim 8 is characterized in that, described determining unit is determined the quantity of the measuring-signal of transmission in described transmission at interval according to following manner:

Determine the minimum pulse protection parameter in the middle of the pulse protection parameter that calculates;

When described minimum pulse protection parameter is less than or equal to 1, described quantity is defined as 1, in described minimum pulse protection parameter greater than 1 o'clock, with described quantity be defined as 1 and (minimum pulse is protected parameter-1) between value.

13. sender unit as claimed in claim 8 is characterized in that, described determining unit is calculated Impulse Noise Protection parameter I NP_no_erasure (i) corresponding to described each circuit that has activated according to following formula:

$\mathrm{INP}\_\mathrm{no}\_\mathrm{erasure}\left(i\right)=\frac{8\×D_p\left(i\right)\×\frac{R_p\left(i\right)}{2\×q_p\left(i\right)}}{L_p\left(i\right)}$

$=\frac{8\×D_p\left(i\right)\×\frac{R_p\left(i\right)}{2\×\frac{N_{{\mathrm{FEC}}_p}\left(i\right)}{I_p\left(i\right)}}}{L_p\left(i\right)}$

$=\frac{8\×(D_p\left(i\right)\×I_p\left(i\right))\×\left(\frac{R_p\left(i\right)}{2\×N_{{\mathrm{FEC}}_p}\left(i\right)}\right)}{L_p\left(i\right)},$

Wherein, i represents line number;

D _p(i) expression interleave depth;

R _p(i) be illustrated in a redundancy bytes number in the RS code word;

q _p(i) be illustrated in the number of the interleaving block that comprises in the RS piece;

L _p(i) be illustrated in the number of the bit that comprises in each DMT symbol;

I _p(i) size of expression interleaving block;

The length of a RS code word of expression.

14. sender unit as claimed in claim 10 is characterized in that, the amount R S_Expend (i) of the symbol that code word diffuses in the signal that described determining unit is determined to transmit on described each circuit that has activated according to following formula:

$\mathrm{RS}\_\mathrm{Expend}\left(i\right)=\frac{8\×I_p\left(i\right)\×D_p\left(i\right)}{L_p\left(i\right)},$

Wherein, i represents line number;

L _p(i) be illustrated in the number of the bit that comprises in each DMT symbol;

I _p(i) size of expression interleaving block;

D _p(i) expression interleave depth.

15. a communication equipment is characterized in that, comprises as each described sender unit among the claim 8-14.

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