JP2006304027A - Interference detecting system and interference detecting method between lines - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an interference detecting system between lines and an interference detecting method between lines, for detecting a line which causes interference between lines whose actually measured speed becomes slow. <P>SOLUTION: The system including any one or the whole of ADSL/VDSL/PLC systems and for detecting the interference between lines comprises an interference adjusting server 10, for registering a line in which difference more than a predetermined value between a theoretical speed based on distance of the ADSL line/VDSL line/PLC line and a measured speed of each line into an abnormal line list recording unit as an abnormal line; for sequentially halting the other lines other than the abnormal line; and for registering a halted line into an abnormal line interference cause list recording unit after determining the halted line as a line for causing the interference relating to the abnormal line, when the measured speed of the abnormal line is to be improved. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  INDUSTRIAL APPLICABILITY The present invention relates to an inter-dwelling house where a VDSL (Very-high-bit-rate Digital Subscriber Line) system, an ADSL (Asymmetric Digital Subscriber Line) system, and a power line network (PLC) system are mixed. The present invention relates to an interference detection system and an inter-line interference detection method.

  The ADSL / VDSL system is a communication system that realizes a high-speed Internet connection using a normal telephone line. The power line net network is a communication system that realizes high-speed Internet connection using a power line such as indoor wiring. And in condominiums such as condominiums, hotels, offices, etc. where no optical fiber is laid, broadband Internet communication is realized using ADSL / VDSL / power line networks that do not require any work in the building. ing. In this case, the usage situation by each user is inconsistent, and there are relatively many cases where a plurality of types of systems are mixed in the same apartment house.

  In addition, a DSL transmission system has been proposed in which data for a plurality of subscribers is multiplexed and converted into an optical signal, transmitted through an optical fiber transmission line, and the received optical signal is converted into an electrical signal for demultiplexing. (For example, refer to Patent Document 1). It also transmits digital telephone signals and VDSL data via a dedicated line, detects the level of harmonic signal components that leak from the VDSL side to the digital telephone side, and sets conditions such as the VDSL transmission level and transmission band. A VDSL communication device that collects data for this purpose has been proposed (see, for example, Patent Document 2).

Also, in mutual transmission devices in VDSL systems that use multi-carriers, the amount of attenuation of each received carrier and the amount of relative phase shift of each carrier are measured and notified to the other party, and transmission characteristics can be recognized. A transmission apparatus that performs control and the like has been proposed (see, for example, Patent Document 3). There has also been proposed means for improving the characteristics of an xDSL communication line by connecting a resistor having a value that provides non-reflection termination characteristics to the end of the branch line of the home wiring (see, for example, Patent Document 4). In addition, when a voltage exceeding a predetermined voltage is applied between every other accommodating terminal of a plurality of lines, a gas discharge is generated inside, and a three-pole discharge element that short-circuits the electrodes is connected, There has been proposed an xDSL splitter in which a low-pass filter that constitutes a splitter is arranged in a staggered manner while being protected from high voltage due to contact or the like (see, for example, Patent Document 5).
JP 2004-193857 A JP 2004-200850 A JP 2004-247901 A JP 2004-260610 A JP 2004-320294 A

  In the system such as the ADSL / VDSL / PLC described above, by transmitting a high-frequency signal that was not assumed at the time of wiring laying, various data can be transmitted at high speed. Interference occurs between lines. As a result, it is often difficult to obtain a desired transmission rate. Conventionally, with respect to such a problem, the transmission status is manually checked for each line to determine whether or not countermeasures for interference between the lines are possible. However, the work for that is complicated, and an effective countermeasure means is not necessarily found.

  Moreover, the interference between one line that is the cause of the inability to obtain a desired transmission rate cannot be solved by the techniques disclosed in Patent Documents 1 to 5. By measuring and recording the attenuation and relative phase shift corresponding to the carrier in the above-mentioned Patent Document 3, by knowing the transmission characteristics corresponding to the line, it is possible to limit the number of carriers used and control the transmission level. Data transmission is performed, and it is not possible to specify the harmful line when inter-line interference occurs.

  SUMMARY OF THE INVENTION An object of the present invention is to enable identification of a harming line causing inter-line interference and to avoid a reduction in transmission rate due to inter-line interference.

  An inter-line interference detection system according to the present invention includes any or all of ADSL / VDSL / PLC systems, and detects inter-line interference. The inter-line interference detection system is based on the distance of the line. A line having a deviation of a predetermined value or more between the theoretical speed of the line and the measured speed of the line is registered as an abnormal line, and the other lines are sequentially paused, and when the measured speed of the abnormal line is improved, the pause is performed. An interference adjustment server that determines the detected line as the interference-causing line.

  The interference adjustment server includes a distance / speed information recording unit that records a distance and a theoretical speed of a line corresponding to the ADSL / VDSL / PLC system, a wiring distance recording unit that records a wiring distance for each line, A subscription information recording unit that records which one of the ADSL / VDSL / PLC system is subscribed to, and an abnormal line list that registers as a faulty line a line in which a deviation of a predetermined value or more between the theoretical speed and the actual speed of the line exists. A recording unit, an abnormal line interference cause list recording unit that records the dormant line as an interference cause line when the measured speed of the abnormal line is improved by sequentially stopping the other lines, and the abnormal line list recording unit; And a monitor for displaying the contents recorded with the abnormal line interference cause list recording unit.

  In addition, the interference adjustment server records a line in which there is a deviation of a predetermined value or more between the theoretical speed and the actual speed of the line as an abnormal line in the abnormal line list recording unit, and the actual speed of the abnormal line is the other speed. A determination unit that records the paused line when there is an improvement of a predetermined value or more due to the pause of the line as an interference cause line in the abnormal line interference cause list recording unit.

  The inter-line interference detection method of the present invention includes any or all of the ADSL / VDSL / PLC systems, and the inter-line interference detection method for detecting inter-line interference is based on the line distance. It is determined whether or not there is a discrepancy greater than a predetermined value between the theoretical speed of the line and the actually measured speed of the line, the existing line is registered as an abnormal line in the abnormal line list recording unit, and other lines other than the abnormal line Are sequentially suspended, and when the measured speed of the abnormal line is improved by a predetermined value or more, the suspended line is determined as an interference cause line, and is recorded in the abnormal line interference cause list recording unit. This includes a process of displaying the recorded contents of the interference list recording unit.

  Since a line that has a deviation of more than a predetermined value between the theoretical speed and the measured speed is regarded as an abnormal line, the interference cause line for this abnormal line can be automatically identified by the interference adjustment server. By responding by changing the arrangement relationship with the line, the problem can be solved quickly and at low cost.

  The present invention includes any or all of ADSL / VDSL / PLC systems and detects interference between lines. The theoretical speed based on the distance between the ADSL line / VDSL line / PLC line and the actually measured line speed. When a line having a deviation greater than or equal to a predetermined value is registered as an abnormal line in the abnormal line list recording unit, other lines other than this abnormal line are sequentially suspended, and when the actual speed of the abnormal line is improved, An interference adjustment server is provided that determines that the suspended line is an interference cause line and registers it in the abnormal line interference cause list recording unit.

  FIG. 1 is an explanatory diagram of a first embodiment of the present invention, in which 1 is an apartment house, 2 is a management room, 3 is a telephone station, 4 is an optical accommodation station, 10 is an interference adjustment server, and 11 is a PLC (power line network). Parent modem, 12 is a distribution board, 13 is a collective VDSL unit, 14 is a telephone line terminal board, 15 is a single MC, 16 is a DSLAM (Digital Subscriber Line Access Multiplexer), 17 is a collective MC, and 21 is VDSL distance / speed information. A recording unit, 22 is an ADSL distance / speed information recording unit, 23 is a PLC distance / speed information recording unit, 24 is a subscription information recording unit for each dwelling unit, and 25 is a wiring information recording unit for each floor. The interference adjustment server 10 further includes a plurality of recording units as will be described later.

  The apartment house 1 is an example of a 4-story building. The room number 101 is a VDSL modem, the room number 102 is an ADSL modem (12M), the room number 201 is a PLC modem and a VDSL modem, and the room number 202 is The PLC modem, room number 301 shows a VDSL modem, room number 302 shows an ADSL modem, and room number 401 shows an ADSL modem (26M). The apartment house 1 includes a building in which a plurality of offices of a plurality of companies exist.

  The management room 2 and the telephone station 3 are connected by a telephone line, and the single MC 15 connected to the collective VDSL unit 13 of the management room 2 and the collective MC 17 of the optical accommodation station 4 are connected by an optical fiber line. Then, data communication is performed using an optical signal. The set MC 17 of the optical accommodation station 4 and the DSLM 16 of the telephone station 3 are connected by an optical fiber line or a telephone line. The VDSL modem in the housing complex 1 is a device that communicates via a telephone line between the end user's personal computer and the collective VDSL unit 13, and the ADSL modem is between the end user's personal computer and the DSLAM 16. The PLC modem is a device that performs communication between the end user's personal computer and the PLC master modem 11 via an indoor wiring.

  The collective VDSL unit 13 also monitors the connection state and speed of the VDSL line, responds to the “state inquiry” request from the interference adjustment server 10, and responds to the measured speeds of all the accommodated VDSL lines. In response to a “line pause” request from the server 10, a function to pause communication on the VDSL line corresponding to the designated collective VDSL unit accommodation position and a “line resume” request from the interference adjustment server 10 are specified. In response to the “restart” request from the interference adjustment server 10 for restarting the VDSL line corresponding to the specified aggregate VDSL unit accommodation position, the function for resuming the communication of the VDSL line corresponding to the aggregate VDSL unit accommodation position And has a function of resetting the communication speed with the corresponding VDSL modem.

  The DSLAM 16 is a device that separates voice and data, sends and receives voice to an exchange, and sends and receives data to an external device. The DSLAM 16 monitors the connection state and speed of the ADSL line. ”In response to the communication speed (measured speed) for all the ADSL lines accommodated in the DSLAM 16, and corresponds to the designated accommodation position in response to the“ line suspension ”request from the interference adjustment server 10. In response to a “line restart” request from the interference adjustment server 10, a function to resume communication on the ADSL line corresponding to the designated accommodation position, and a “re-start” from the interference adjustment server 10. A function to restart the ADSL line corresponding to the specified accommodation position and reset the communication speed with the corresponding ADSL modem in response to the “startup” request Those having.

  The PLC master modem 11 is a device that transmits and receives data from an external device (not shown) via a power lead-in line, monitors the connection state and speed of the PLC line, and receives a “state inquiry” from the interference adjustment server 10. In response to the request, the function of responding to the communication speed of all the PLC lines accommodated in the PLC parent modem 11, and the PLC line corresponding to the designated PLC parent modem accommodation position in response to the “line suspension” request from the interference adjustment server 10 In response to a “line restart” request from the interference adjustment server 10, a function of restarting communication on the PLC line corresponding to the designated PLC parent modem accommodation position, and “ In response to a “restart” request, the PLC line corresponding to the designated PLC parent modem accommodation position is restarted, and the communication speed with the PLC slave modem is reset. Is shall.

  The interference adjustment server 10 is a device that performs data transmission / reception with the collective VDSL unit 13, DSLAM 16, PLC parent modem 11, and performs information reading and control of each device, VDSL distance / speed information recording unit 21, ADSL distance / speed. It has a storage device including an information recording unit 22, a PLC distance / speed information recording unit 23, a subscription information recording unit 24 of each dwelling unit, and a wiring information recording unit 25 of each floor, and further, a VDSL abnormal line list recording unit described later ADSL abnormal line list recording unit, PLC abnormal line list recording unit, VDSL interference cause list recording unit, ADSL interference cause list recording unit, and PLC interference cause list recording unit.

  2 is an explanatory diagram of the interference adjustment server. The same reference numerals as those in FIG. 1 denote the same parts, 31 is an interference determination result output unit, 32 is a determination unit, 33 is a device communication unit, and 34 to 39 are the above-described units. A VDSL abnormal line list recording unit, an ADSL abnormal line list recording unit, a PLC abnormal line list recording unit, a VDSL abnormal line interference cause list recording unit, an ADSL abnormal line interference cause list recording unit, and a PLC abnormal line interference cause list recording unit are shown. Reference numeral 40 denotes a monitor for displaying various data to an operator or the like. The VDSL abnormal line list recording unit 34, the ADSL abnormal line list recording unit 35, and the PLC abnormal line list recording unit 36 may be configured as an abnormal line list recording unit. The VDSL abnormal line interference cause list recording unit 37, the ADSL abnormal line interference cause list recording unit 38, and the PLC abnormal line interference cause list recording unit 39 can be configured as an abnormal line interference cause list recording unit. Similarly, the VDSL distance / speed information recording unit 21, the ADSL distance / speed information recording unit 22, and the PLC distance / speed information recording unit 23 can be configured as a distance / speed information recording unit.

The interference adjustment server 10 has the following functions.
(1) The information of the dwelling unit that has joined the VDSL line is acquired from the subscription information recording unit 24 of each dwelling unit, and the distance from the collective VDSL unit 13 to that dwelling unit is extracted from the wiring information recording unit 25 of each floor. The extracted distance and the information recorded in the VDSL distance / speed information recording unit 21 are collated to extract the theoretical communication speed. The extracted theoretical communication speed is compared with the speed information (actually measured value) obtained by performing “state inquiry” to the collective VDSL unit 13, and when there is a discrepancy greater than a certain value, the VDSL abnormal line list A function added to the recording unit 34.
(2) By instructing “line suspension” for VDSL lines, ADSL lines, and PLC lines of all dwelling units other than the dwelling units present in the VDSL abnormal line list recording unit 34, the data transmission is paused sequentially, and this applies Whether or not the speed of the VDSL line of the dwelling unit is improved is confirmed by “restarting” the abnormal VDSL line and performing a “status inquiry” after a predetermined time has elapsed. A function of recording, in the VDSL interference cause list recording unit 37, a line that has been stopped at that time as a cause of interference when the speed of the VDSL line is improved.

(3) A function of displaying information recorded by the processing related to the VDSL line described above on the monitor 30 by the interference determination result output unit 31.
(4) The dwelling unit and service type that subscribe to the ADSL line are acquired from the subscription information recording unit 24 of each dwelling unit, and the information recorded in the ADSL distance / speed information recording unit 22 is collated from the extracted service type. To extract the communication speed. The extracted theoretical communication speed is compared with the speed information (actually measured value) obtained by performing “state inquiry” to the DSLAM 16, and if there is a deviation of a certain value or more, the ADSL abnormal line list recording unit 35 Ability to record additionally.
(5) Instructing “line suspension” to the VDSL line, ADSL line, and PLC line of all the dwelling units other than the dwelling unit existing in the ADSL abnormal line list recording unit 36, and the speed of the ADSL line of the corresponding dwelling unit is improved when it is suspended. This is confirmed by “restarting” the abnormal ADSL line and performing “status inquiry” after a certain time. A function of additionally recording in the ADSL abnormal line interference cause list recording unit 38 as a cause line of interference when the speed of the ADSL line is improved.

(6) A function for displaying on the monitor 30 information recorded by the processing related to the VDSL line.
(7) The dwelling unit that joins the PLC is acquired from the subscription information recording unit 24 of each dwelling unit, the distance from the PLC parent modem 11 to the dwelling unit is extracted from the wiring information recording unit 25 of each floor, and the extracted distance and the PLC The theoretical communication speed is extracted by collating the information recorded in the distance / speed information recording unit 23. The extracted theoretical communication speed is compared with the speed information (actually measured value) obtained by performing a “state inquiry” to the PLC parent modem 11, and if there is a deviation greater than a certain value, the PLC abnormality A function added to the line list recording unit 36.
(8) When a line is paused sequentially by instructing “line suspension” to the VDSL line, ADSL line, and PLC line of all the dwelling units other than the dwelling units present in the PLC abnormal line list recording unit 36 Whether the PLC line speed of the corresponding unit is improved by “restarting” the abnormal PLC line and performing a “status inquiry” after a certain period of time has elapsed. A function of adding, to the PLC abnormal line interference cause list recording unit 39, the line that has been stopped at that time as the cause of interference when the speed of the PLC line is improved.

(9) A function of displaying information recorded by the processing related to the PLC line on the monitor 30 by the interference determination result output unit 31.
(10) A function of issuing a request instruction to the DSLAM 16, the collective VDSL unit 13, and the PLC parent modem 11 by the device communication unit 33.
(11) A function that causes the determination unit 32 to determine whether or not recording is performed in each recording unit and whether or not the cause is abnormal line interference depending on the recording contents.

Each recording unit in the storage device of the interference adjustment server 10 records and holds the following contents.
The VDSL distance / speed information recording unit 21 records and holds the VDSL theoretical speed corresponding to the distance between the collective VDSL unit 13 and the VDSL modem. The ADSL distance / speed information recording unit 22 records and holds the ADSL theoretical speed corresponding to the distance between the DSLAM 16 and the ADSL modem for each ADSL service type. The PLC distance / speed information recording unit 23 records and holds the PLC theoretical speed corresponding to the distance between the PLC parent modem 11 and the PLC child modem.

  Further, the subscription information recording unit 24 of each dwelling unit is a VDSL / ADSL / PLC contract for each unit of the apartment house 1, or in the case of ADSL, which service type, or a collective VDSL unit modem corresponding to the contract service type. / DSLAM / PLC The subscription information indicating which is accommodated in the parent modem and the accommodation position information are recorded and held. Further, the wiring information recording unit 25 on each floor records and holds the laying distance from the management room of the power lines and telephone lines laid inside the apartment house 1 for each floor. In this case, the power line is the distance from the distribution board in the management room to each door, and the telephone line is the distance from the telephone line terminal board 14 in the management room to each door.

  The VDSL abnormal line list recording unit 34 records and holds a list of VDSL lines that are operated at an actual speed that deviates from a theoretical value detected as a processing result of the interference adjustment server 10 by a certain amount or more. The ADSL abnormal line list recording unit 35 records and holds a list of ADSL lines operated at an actual speed that deviates from a theoretical value detected as a processing result of the interference adjustment server 10 by a certain amount or more. The PLC abnormal line list recording unit 36 records and holds a list of PLC lines that are operated at an actual speed that deviates from a theoretical value detected as a processing result of the interference adjustment server 10 by a certain amount or more.

  The VDSL abnormal line interference cause list recording unit 37 records and holds a list of lines found to be the cause of abnormality in the VDSL abnormal line list detected as a processing result of the interference adjustment server 10. The line that has become abnormal and the line that is causing the abnormality are compared and stored. The ADSL abnormal line interference cause list recording unit 38 records and holds a list of lines found to be the cause of abnormality in the ADSL abnormal line list detected as a processing result of the interference adjustment server 10. The line that has become abnormal and the line that is causing the abnormality are compared and stored. The PLC abnormal line interference cause list recording unit 39 records and holds a list of lines found to be the cause of abnormality in the PLC abnormal line list detected as a processing result of the interference adjustment server 10. The line that has become abnormal and the line that is causing the abnormality are compared and stored.

  3 and 4 show an example of the recorded contents of the above-described recording units 21 to 25 and 34 to 39. The subscription information recording unit 24 of each dwelling unit shown in FIG. 4 includes a VDSL corresponding to each dwelling unit. / ADSL / PLC subscription status, collective VDSL unit modem / DSLAM / PLC parent modem accommodation location information, contracted service type, etc. are recorded.

  5 to 8 show flowcharts of the first embodiment of the present invention, and information transmission / reception destinations with the interference adjustment server 10 are shown in parentheses with reference numerals of the configurations shown in FIGS. 1 and 2. . As a condition for registering in the abnormal line list, for example, a case where the theoretical speed and the actually measured speed are different from each other by a predetermined value of 10 Mbps or more will be described below with reference to examples of recorded contents in FIGS. . First, the interference adjustment server 10 includes the housing units “101”, “201”, “301” that join the VDSL line from the subscription information recording unit 24 of each unit, and the accommodation positions “001”, “002” in the collective VDSL unit 13. ”And“ 003 ”are extracted (A1).

  About each extracted dwelling unit, the distance from the collective VDSL unit 13 to the dwelling unit is extracted from the wiring information recording part 25 of each floor (A2). For example, the dwelling unit “101” is 100 m from the collective VDSL unit 13 and searches the VDSL distance / speed information recording unit 21 to extract the theoretical communication speed for this wiring distance (A3). In this case, the distance is 100 Mbps for a distance of 100 m. Next, a “state inquiry” is made to the collective VDSL unit 13 to obtain the measured speed. In this case, an actual measurement speed of 60 Mbps is acquired. For all dwelling units that join the VDSL line, the theoretical speed and the actually measured speed are compared (A4), and it is determined whether there is a deviation greater than a certain value (A5). In this case, since the theoretical communication speed is 100 Mbps−the actual measurement speed is 60 Mbps = 40 Mbps, and there is a divergence of 10 Mbps or more of a constant value, the corresponding unit “101” is recorded in the VDSL abnormal line list recording unit. (A6). Processing of this determination (A5) and recording (A6) is sequentially performed for all the houses subscribed to the VDSL line.

  Next, the presence / absence of the VDSL abnormal line list is determined (A7), and if there is one or more, the cause investigation is started. This cause investigation is started according to the VDSL abnormal line list, and processing is started for all VDSL lines. First, one of the cases recorded in the VDSL abnormal line list recording unit 34 is selected, and the dwelling units “201” and “301” who join the VDSL line other than this dwelling unit “101” and the collective VDSL unit 13 The accommodation positions “002” and “003” are retrieved from the subscription information recording unit 24 of each dwelling unit, and the “line suspension” is requested from the collective VDSL unit 13 by designating the accommodation position (A8). For example, the accommodation position 002 is designated to instruct “line suspension”. Next, for the abnormal VDSL line, the “restart” is requested to the collective VDSL unit 13 by designating the accommodation position, and after a predetermined time, the “status inquiry” is made to the collective VDSL unit 13 to collect the dwelling unit. The actual measurement speed of the accommodation position in the VDSL unit 13 is acquired (A9).

  It is determined whether or not the speed of the abnormal VDSL line has been improved (A10). If the speed has been improved, the VDSL line that has been suspended at that time is suspected as the cause of interference, and is added to the interference cause list (A11). If the speed of the abnormal VDSL line is not improved or if the speed is improved, after adding it to the interference cause list, specify the accommodation position of the suspended VDSL line to the collective VDSL unit 13 and instruct "Line restart" (A12).

  After performing the above-described processing on all VDSL lines, the cause investigation for all ADSL lines is started. That is, the housing information “102”, “302”, “401” and the housing locations “001”, “002”, “003” in the DSLAM 16 are searched from the subscription information recording unit 24 of each unit, The DSLAM 16 is requested to “line stop” by designating the accommodation position in the DSLAM 16 for one of the cases subscribed to the ADSL line (A13). Next, for the collective VDSL unit 13, an accommodation position in the collective VDSL unit 13 is designated and a “restart” is requested, and after a certain time, a “status inquiry” is performed, and the containment in the collective VDSL unit 13 The actual position speed is acquired (A14).

  Next, it is determined whether or not the speed of the abnormal VDSL line has been improved (A15). At this time, assuming that the line stop of the dwelling unit “102” is performed and the actually measured speed of the VDSL line of the dwelling unit “101” is 90 Mbps, this is an improvement over the previous 60 Mbps. When the speed is improved, the line information indicating the line stop at that time is added to the VDSL abnormal line interference cause list recording unit 37 to the interference cause list (A16). In this case, the ADSL line of the dwelling unit “102” is added to the list as the interference cause line for the VDSL line of the dwelling unit “101”. Then, after the list is added and when the speed is not improved, the operation of the paused ADSL line is designated by specifying the accommodation position in the DSLAM 16 and “line restart” (A17). When steps (A13) to (A17) are completed for the ADSL line of each house, the process for the PLC line of each house is started.

  From the subscription information recording unit 24 of each dwelling unit, the dwelling unit subscribing to the PLC line and the accommodation position in the PLC main modem 11 are searched, and one of the dwelling units with the PLC line subscribing to the PLC parent modem 11 is searched. Is designated for the accommodation position in the PLC parent modem 11, and "line suspension" is instructed (A18). Then, the collective VDSL unit 13 is instructed to restart the abnormal VDSL line, and a “state inquiry” is performed to obtain the measured speed (A19). By this speed measurement, it is determined whether or not the speed of the abnormal VDSL line has been improved (A20). If the speed has been improved, the line information of the line stop at that time is added to the interference cause list (A21). Then, including the case where the speed is not improved, the PLC parent modem 11 is instructed to “restart the line” to resume the operation of the paused PLC line (A22). The cause investigation is completed by performing the above processing on all PLC lines. For example, if the measured speed of the VDSL line of the dwelling unit 101 is 80 Mbps when the PLC line of the dwelling unit “102” is suspended, the speed of the VDSL line is improved, so the VDSL abnormal line interference cause list recording unit 37 The PLC line of the dwelling unit “201” and the ADSL line of the dwelling unit “102” are registered as interference cause lines.

  Then, the VDSL abnormal line list is displayed on the monitor 30 (A23), and the VDSL abnormal line interference cause list is displayed (A24), and the actually measured speed with respect to the theoretical communication speed of the VDSL line has a deviation of a certain value or more. When the cause of the case is due to other wiring, the wiring can be specified. Further, when there is no interference cause line for the line registered in the VDSL abnormal line list, it is understood that the cause is other than the influence of the wiring in the apartment house 1.

  FIGS. 9 to 12 show flowcharts of Embodiment 2 of the present invention, showing a case where the cause of interference with the ADSL line is detected. For example, the difference between the theoretical communication speed and the measured speed is more than 3 Mbps. In this case, the conditions to be recorded in the ADSL abnormal line list recording unit 35 of the interference adjustment server 10 will be described below with reference to steps (B1) to (B23).

  Dwelling units “102”, “302”, “401” and service types “12M”, “50M”, “26M” (each of which omits bps) and the collective VDSL unit that join the ADSL line from the subscription information recording unit 24 of each unit The storage positions “001”, “002”, and “003” in 13 are extracted (B1). For the dwelling units “102”, “302”, and “401”, the speed information corresponding to the service type is extracted from the ADSL distance / speed information recording unit 22 (B2). For example, the theoretical communication speed “9 Mbps” at the distance 1780 m of the service type “12M” of the dwelling unit “102” is acquired. Next, the speed is compared with the speed of each ADSL modem (B3). In this case, a “state inquiry” is made to the DSLAM 16 to obtain the actual speed with the ADSL modem, and the speed corresponding to the service type is compared with the actual speed of the ADSL modem.

  The theoretical speed for the service type “12M” of the dwelling unit “102” is 9 Mbps, but if the measured speed is 5.5 Mbps, the theoretical communication speed “9 Mbps” −the measured speed “5.5 Mbps” = “3. 5 Mbps ”and 3.5 Mbps> 3 Mbps, so the dwelling unit“ 102 ”is recorded in the ADSL abnormal line list recording unit 35. Such processing is performed for all the houses (B4) and (B5).

  Next, it is determined whether or not it is recorded in the ADSL abnormal line list recording unit 35 (B6), and if it is recorded, the cause investigation is started. First, it starts for all VDSL lines, and from the subscription information recording unit 24 of each dwelling unit, the dwelling units “101”, “201”, “301” subscribing to the VDSL line, and the accommodation positions in the collective VDSL unit 13 “001”, “002”, and “003” are acquired, and an instruction to sequentially suspend VDSL lines is given to the collective VDSL unit 13 (B7). In this case, first, the accommodation position “001” in the collective VDSL unit 13 is designated for the dwelling unit “101” to instruct “line suspension”.

  Each time the VDSL line is suspended, the abnormal ADSL line is restarted, and the speed reset at the time of restart is measured (B8). In this case, the accommodation position “001” in the DSLAM of the dwelling unit “102” is designated to the DSLAM 16 to request “restart”. Then, a “state inquiry” is made to the DSLAM 16 to obtain an actually measured speed “7 Mbps”. Then, it is determined whether or not the speed of the abnormal ADSL line has been improved (B9). In this case, the speed was improved because 5.5 Mbps <7 Mbps. Thus, the line information (type and dwelling unit) when the speed is improved is added to the interference cause list (B10). That is, dwell unit “101” is recorded as an interference line for dwell unit “102”. Next, the suspended VDSL line is resumed (B11). In this case, the accommodation position “001” is designated for the dwelling unit “101” and “line restart” is instructed to the collective VDSL unit 13.

  The above-described processing is performed on the houses “201” and “301”. The measured speed is “5.5 Mbps” in any case, and since the speed is not improved, it is not recorded in the ADSL abnormal line interference cause list recording unit 38. When the process for all VDSL lines is completed, the process for all ADSL lines is performed. That is, the ADSL lines other than the abnormal ADSL line are sequentially suspended (B12), the abnormal ADSL line is restarted, the speed of the abnormal ADSL line is measured (B13), and the speed of the abnormal ADSL line is improved. (B14), the suspended line information (type, dwelling unit) when the speed is improved is added to the interference cause list (B15), and the suspended ADSL line is resumed (B16). In this case, the dwell units “302” and “401” subscribing to the ADSL line other than the dwell unit “101” and the accommodation positions “002” and “003” in the DSLAM 16 other than the dwell unit “101” are acquired from the dwell unit “101”. On the other hand, the accommodation position “002” in the DSLAM 16 of the dwelling unit “302” is designated to request “line suspension”.

  Then, the accommodation position “001” in the collective VDSL unit 13 of the dwelling unit “102” is designated to the DSLAM 16 to request “restart”, the “status inquiry” is made to the DSLAM 16, and the actually measured speed “5” .5 Mbps ". When this measured speed is compared with the actually measured speed previously measured, the speed is not improved, so it is not recorded in the ADSL abnormal line interference cause list recording unit 38. Then, the DSLAM 16 is requested to specify the accommodation position “002” in the DSLAM 16 of the dwelling unit “302” and to “restart the line”. The above-described processing is also performed for the dwelling unit “401”. The actually measured speed at this time is “5.5 Mbps” and is not recorded in the ADSL abnormal line interference cause list recording unit 38.

  When processing for all ADSL lines is completed, processing for all PLC lines is performed. That is, the PLC lines are sequentially paused (B17), the abnormal ADSL line is restarted, the speed of the abnormal ADSL line is measured (B18), and it is determined whether the speed of the abnormal ADSL line has been improved (B20). Then, the paused PLC line is restarted (B21), and when the processing for all the PLC lines is completed, the cause investigation of the ADSL abnormal line is ended. Then, the interference determination output unit 31 displays the ADSL abnormal line list on the monitor 30 (B22), and displays the ADSL abnormal line interference cause list on the monitor 30 (B23).

  For example, in the case of starting the processing of the PLC lines of all the units, the dwelling units “201” and “202” subscribing to the PLC line from the subscription information recording unit 24 of each dwelling unit and the accommodation position “001”, “002” is acquired, the accommodation position “001” in the PLC parent modem 11 of the dwelling unit “201” is designated to the PLC parent modem 11 to request “line suspension”, and the dwelling unit “102” is requested to the DSLAM 16. ”Designates the accommodation position“ 001 ”in the collective VDSL unit 13 and requests“ restart ”.

  Then, a “state inquiry” is made to the DSLAM 16 to obtain an actually measured speed “5.5 Mbps”, and the actually measured speed is compared with the previously obtained actually measured speed. In this case, since the speed has not improved, recording is not performed in the ADSL abnormal line interference cause list recording unit 38. Then, the PLC parent modem 11 is requested to designate the accommodation position “001” in the PLC parent modem 11 of the dwelling unit “201” and to “restart the line”. Such processing is also performed on the dwelling unit “202”. The actually measured speed at this time is “5.5 Mbps” and is not recorded in the ADSL abnormal line interference cause list recording unit 38.

  The above-described processing is performed for the dwelling unit “302”. In this case, the theoretical communication speed “40 Mbps” −actually measured speed “35 Mbps” = 5 Mbps is recorded in the ADSL abnormal line list recording unit 35, but the interference cause dwelling unit is recorded in the ADSL abnormal line interference cause list recording unit 38. Not. Similarly, it carries out also about dwelling unit "401". Theoretical communication speed “23 Mbps” −measured speed “20.5 Mbps” = 2.5 Mbps, which is not recorded in the ADSL abnormal line list recording unit 35. Through the above processing, “101” is recorded in the interference cause dwelling unit for the dwelling unit “102” in the ADSL interference cause list recording unit 35. As a result, it is found that the actual speed reduction in the dwelling unit “102” is caused by the interference by the VDSL line of the dwelling unit “101”. On the other hand, since there is no interference cause dwelling unit for the dwelling unit “302” in the ADSL interference cause list recording unit 35, the actual speed reduction in the dwelling unit “302” is not caused by interference of other lines, It turns out that there are other causes such as problems.

  FIGS. 13 to 16 are flowcharts of Embodiment 3 of the present invention. In the detection of the cause of interference with the PLC line, the theoretical speed and the actual measurement are used as the recording conditions for the PLC abnormal line list recording unit 36 of the interference adjustment server 10. Assume that the speed is a deviation of 15 Mbps or more. Steps (C1) to (C24) will be described below.

  The PLC user is extracted from the subscription information recording unit 24 of each dwelling unit (C1), the power wiring distance for this PLC user is extracted from the wiring distance recording unit 25 (C2), and the wiring distance from the PLC distance / speed information recording unit 24 is extracted. (C3), the communication speed with the PLC slave modem is received by the device communication unit 33 from the PLC parent modem 11, and the determination unit 32 compares and determines (C4). It is determined whether or not there is a certain degree of deviation for all the houses (C5), and if it is judged that there is a certain degree of deviation or more, it is added to the PLC abnormal line list (C6).

  In this case, based on the recording contents of each recording unit shown in FIGS. 3 and 4, the subscription information recording unit 24 of each dwelling unit uses the PLC line subscription dwelling units “201” and “202” and the PLC master modem 11. The accommodation positions “001” and “002” are extracted, and for the dwelling unit “201”, the distance information 300 m from the PLC parent modem 11 to the dwelling unit “201” is extracted with reference to the wiring information recording unit 25 of each floor, and the PLC distance The theoretical communication speed “130 Mbps” is acquired from the speed information recording unit 23. Then, a “state inquiry” is made to the PLC parent modem 11 to obtain the actual measurement speed “110 Mbps”, the theoretical communication speed “130 Mbps” −the actual measurement speed “110 Mbps” = 20 Mbps, and the condition of 20 Mbps> 15 Mbps. The dwell unit “201” is recorded in the PLC abnormal line list recording unit 36.

  Next, it is determined whether or not the information is recorded in the PLC abnormal line list recording unit 36 (C7). If even one is recorded, the cause investigation is started, and the processing is first performed on all VDSL lines. Do. That is, the apparatus communication unit 33 instructs the collective VDSL unit 13 to sequentially stop the VDSL line (C8), restarts the abnormal PLC line, measures its speed (C9), and sets the speed of the abnormal PLC line. Is improved (C10), and if it is improved, the information on the line that has been suspended is additionally recorded in the interference cause list (C11), and the operation of the suspended VDSL line is restarted (C11). C12).

  In this case, the dwelling units “101”, “201”, “301” and the accommodation positions “001”, “002”, “003” in the collective VDSL unit 13 from the subscription information recording unit 24 of each dwelling unit. To get. Next, with respect to the collective VDSL unit 13, the accommodation position “001” in the collective VDSL unit is designated for the dwelling unit “101”, and “line suspension” is requested, and the dwell unit “201” is requested to the PLC parent modem 11. The accommodation position “001” in the PLC parent modem 11 is designated and “restart” is requested. Then, a “state inquiry” is made to the PLC parent modem 11 to obtain an actually measured speed “120 Mbps”. The measured speed before the VDSL line is stopped and the measured speed when the VDSL line is stopped are compared to determine whether or not the speed has been improved. Each measured speed in this case is 110 Mbps <120 Mbps, and the speed is improved. After recording the dwell unit “101” as the interference line for the dwell unit “201” in the PLC abnormal line interference cause list recording unit 39, the set The VDSL unit 13 is requested to designate the accommodation position “001” in the collective VDSL unit for the dwelling unit “101” and to “restart the line”. In addition, the above-described processing is performed for the dwelling units “201” and “301”, and the measured speeds are both “110 Mbps” and the speeds are not improved. Therefore, the PLC abnormal line interference cause list recording unit 39 includes Do not record.

  Next, the same processing (C13) to (C17) is carried out for all ADSL lines. The same processing (C18) to (C22) is performed for all PLC lines. Then, the PLC abnormal line list is displayed on the monitor 30 (C23), and the PLC abnormal line interference cause list is displayed (C24). In this case, the dwelling units “102”, “302”, “401” subscribing to the ADSL line from the subscription information recording unit 24 of each dwelling unit and the accommodation positions “001”, “002”, “003” in the DSLAM 16 Acquired and designates the accommodation position “001” in the DSLAM 16 of the dwelling unit “102” to the DSLAM 16 and requests “line suspension”.

  The PLC parent modem 11 is requested to “restart” by designating the accommodation position “001” in the PLC parent modem 11 of the dwelling unit “201”. After a certain period of time, a “state inquiry” is made to the PLC parent modem 11 to obtain the actually measured speed “110 Mbps”. When this measured speed is compared with the actually measured speed before the ADSL line is suspended, the speed is not improved, so that it is not recorded in the PLC abnormal line interference cause list recording unit 39. Next, the housing location “001” in the DSLAM 16 of the dwelling unit “102” is designated to the DSLAM 16 to request “line restart”. The above-described processing is also performed on the houses “302” and “401”. The measured speeds are both “110 Mbps” and are not recorded in the PLC abnormal line interference cause list recording unit 39.

  Next, from the subscription information recording unit 34 of each dwelling unit, the dwelling unit “202” that joins the PLC line other than the dwelling unit “201” and the accommodation position “002” in the PLC parent modem 11 are acquired. Then, the accommodation position “002” in the PLC parent modem 11 of the dwelling unit “202” is designated to request “line suspension”. Then, the PLC parent modem 11 is requested to specify the accommodation position “001” in the collective VDSL unit 13 of the dwelling unit “201” and request “restart”, and the PLC parent modem 11 is inquired of “status inquiry”. The measured speed “110 Mbps” is obtained, and when this measured speed is compared with the measured speed before the stop, the speed is not improved, and therefore, it is not recorded in the PLC abnormal line interference cause list recording unit 39.

  Next, the PLC parent modem 11 is requested to specify the accommodation position “002” in the PLC parent modem 11 of the dwelling unit “202” and to “restart the line”. The dwelling unit “202” is also the same as described above. Perform the process. As a result, the theoretical communication speed “130 Mbps” −measured speed “125 Mbps” = 5 Mbps, which is 15 Mbps or less, and is not recorded in the PLC abnormal line list recording unit 36. Through the processing described above, the interference cause dwelling unit “101” for the dwelling unit “201” in the PLC abnormal line interference cause list recording unit 39 is recorded. By displaying these recorded contents on the monitor 30 by the interference determination result output unit 31, it is found that the actual speed reduction in the dwelling unit “201” is caused by the interference by the VDSL line of the dwelling unit “101”. .

It is explanatory drawing of Example 1 of this invention. It is explanatory drawing of an interference adjustment server. It is explanatory drawing of the recording content of each recording part. It is explanatory drawing of the recording content of each recording part. It is a flowchart of Example 1 of this invention. It is a flowchart of Example 1 of this invention. It is a flowchart of Example 1 of this invention. It is a flowchart of Example 1 of this invention. It is a flowchart of Example 2 of this invention. It is a flowchart of Example 2 of this invention. It is a flowchart of Example 2 of this invention. It is a flowchart of Example 2 of this invention. It is a flowchart of Example 3 of the present invention. It is a flowchart of Example 3 of the present invention. It is a flowchart of Example 3 of the present invention. It is a flowchart of Example 3 of the present invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Apartment house 2 Control room 3 Telephone station 4 Optical accommodation station 10 Interference adjustment server 11 PLC parent modem 12 Distribution board 13 Collective VDSL unit 14 Telephone line terminal board 15 Single MC
16 DSLAM
17 Set MC
21 VDSL distance / speed information recording unit 22 ADSL distance / speed information recording unit 23 PLC distance / speed information recording unit 24 Subscription information recording unit of each dwelling unit 25 Wiring information recording unit of each floor 30 Monitor 31 Interference determination result output unit 32 Determination unit 33 Device communication unit 34 VDSL abnormal line list recording unit 35 ADSL abnormal line list recording unit 36 PLC abnormal line list recording unit 37 VDSL abnormal line interference cause list recording unit 38 ADSL abnormal line interference cause list recording unit 39 PLC abnormal line interference cause list Recording section

Claims (4)

In an inter-line interference detection system that includes any or all of ADSL / VDSL / PLC systems and detects inter-line interference,
Register a line having a deviation of a predetermined value or more between the theoretical speed of the line based on the distance of the line and the actually measured speed of the line as an abnormal line, sequentially stop other lines, and actually measure the abnormal line An inter-line interference detection system, comprising: an interference adjustment server that determines the paused line as an interference-causing line when the speed is improved.   The interference adjustment server includes a distance / speed information recording unit that records a distance and a theoretical speed of a line compatible with the ADSL / VDSL / PLC system, a wiring distance recording unit that records a wiring distance for each line, and the ADSL / VDSL / PLC system, which is a subscriber information recording unit that records which one is subscribed to, and an abnormal line list record that registers a line having a deviation of a predetermined value or more between the theoretical speed and the actual speed of the line as an abnormal line An abnormal line interference cause list recording unit that records the paused line as an interference cause line when the measured speed of the abnormal line is improved by sequentially pausing the other lines, the abnormal line list recording unit, The inter-line interference detection system according to claim 1, further comprising a monitor that displays a recording content of the abnormal line interference cause list recording unit.   The interference adjustment server records a line in which a deviation of a predetermined value or more between the theoretical speed and the actual speed of the line exists as an abnormal line in the abnormal line list recording unit, and the actual speed of the abnormal line is the other speed 3. The determination unit according to claim 1, further comprising: a determination unit that records, in the abnormal line interference cause list recording unit, a line that has been stopped when an improvement of a predetermined value or more has occurred due to a line stop. Inter-line interference detection system. In an inter-line interference detection method for detecting interference between lines, including any or all of ADSL / VDSL / PLC systems,
It is determined whether or not there is a deviation of a predetermined value or more between the theoretical speed of the line based on the distance of the line and the actually measured speed of the line, and the existing line is registered as an abnormal line in the abnormal line list recording unit. The other lines other than the abnormal line are sequentially suspended, and when the measured speed of the abnormal line is improved by a predetermined value or more, the suspended line is determined as an interference cause line, and an abnormal line interference cause list is obtained. A method for detecting interference between lines, comprising a step of recording in a recording unit and displaying the contents recorded in the abnormal line interference list recording unit.

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