JP5059671B2 - Home communication device with timer function - Google Patents

Description

The present invention relates to an in-home communication apparatus with a timer function, which reduces power consumption and prevents deterioration in communication state due to fluctuations in the amount of interference, and in particular, ADSL (Asymmetric Digital Subscriber Line) that enables high-speed data transmission on a metallic telephone line. The present invention relates to a technology suitably applied in a technical field such as a communication device of an xDSL transmission system such as VDSL (Very High-Speed Digital Subscriber Line).

  A digital subscriber line (xDSL; hereinafter referred to as DSL) transmission system such as ADSL or VDSL, which enables high-speed data transmission over a metallic telephone line, is usually performed mainly by a collective communication device and a home communication device such as a home modem. Composed. 8 and 9 are diagrams schematically illustrating the DSL transmission system 800. FIG. The collective communication device 810 is installed in the telephone station as shown in FIG. 8, or is installed in a building between the telephone station and the subscriber's house as shown in FIG.

  When installed between the telephone office building and the subscriber's house, the form of FTTR (Fiber To The Remote terminal) installed at the top of the telephone pole or near the entrance of the apartment for the subscriber of the apartment There is a form of FTTB (Fiber To The Building) installed. 8 and 9, power is always supplied to the collective communication device 810.

  When a subscriber (end user) starts access to the Internet or the like via a DSL transmission system, a plug connected to a home communication device such as a home modem 830 is inserted into a power outlet in the home of the subscriber. Thus, it is necessary to supply power to the home communication device. Note that there are various communication devices such as a router having a modem function in addition to a single modem device as a home communication device. Here, a home modem 830 will be described as an example of the home communication device.

  When power is supplied to the home modem 830, the collective communication device 810 detects a signal from the home modem 830, or vice versa, even if the subscriber does not operate anything afterwards. Triggered by the home modem 830 detecting this signal, the initialization process is started.

  The initialization process usually takes about 20 seconds to 1 minute. If the signal quality of the telephone line 820 is not good due to the influence of a bridge tap that branches the telephone line or noise, the initialization process may take more than one minute. When the initialization process is completed, data communication is possible (hereinafter referred to as a link connection state), and the subscriber can access the Internet and perform Internet communication and the like.

  By the way, in the DSL transmission system, once the link connection is established, the personal computer 840 to be connected to the home modem 830 even if the data communication is not performed or the Internet is not connected. DSL signal transmission / reception (hereinafter referred to as DSL signal communication) is performing data communication between the collective communication device 810 and the home modem 830 even if they are not connected (including via wireless). It is done in the same way as when.

  When DSL signal communication is performed, not only the collective communication device 810 but also the home modem 830 consumes power, and the home modem 830 is unplugged from the power outlet even when it is not connected to the Internet. Unless the power supply to the home modem 830 is turned off, the home modem 830 continues to consume power.

  By the way, in recent years, with increasing awareness of the global environment, the reduction of carbon dioxide emissions has become a global concern, and it is required to minimize the consumption of electricity that leads to carbon dioxide emissions. ing. At present, it is estimated that there are not a few subscribers who manually supply power to the home modem 830 only after using the DSL transmission system to access the Internet and stop the power supply after use. The

  In this way, supplying power to the home modem 830 only when using the DSL transmission system is highly desirable from the viewpoint of reducing power consumption of the home modem 830. Since the conversion process is started from the beginning, there is a waiting time until access to the Internet. Conversely, since this waiting time occurs, it is estimated that there are many subscribers who do not stop the power supply of the home modem 830 even after use.

  ITU recommendation G.ADSL2 992.3 provides a power management function and defines a low power mode. The low power mode defines an L2 state in which only the collective communication device 810 transmits an ADSL signal with a low power output, and an L3 state in which neither the collective communication device 810 nor the home modem 830 transmits a signal. Regardless of the state, the recommendation is limited to the specification of the protocol for the state transition between the collective communication device 810 and the home modem 830, and the higher-level application software is not specified.

The following Patent Document 1 proposes to electrically connect or disconnect the ADSL line by remote control in order to reduce power consumption after use of the ADSL transmission system. In addition, the one described in Patent Document 1 can also set a WAKE UP schedule in the form of a time schedule, and it is assumed that connection and disconnection of an ADSL line is performed by starting and stopping output of an ADSL signal. .
Japanese Patent No. 3487820

  By the way, as shown in FIGS. 8 and 9, the telephone lines 820 connected to each subscriber's house are often bundled near the collective communication device 810 and connected to the collective communication device 810. This is because a plurality of telephone lines are collectively inserted into the connector of the collective communication device 810, and may be bundled in the form of a cable 850. At this time, interference called far-end crosstalk occurs between the telephone lines. This is shown in FIG.

  FIG. 10 shows a state in which interference occurs between the telephone line 820 and the telephone line 821 due to the far-end crosstalk 860. Similarly, interference between the telephone line 821 and the telephone line 822 is caused by the far-end crosstalk 861. Interference due to far-end crosstalk is caused by signals leaking to each other's telephone lines due to electrostatic induction or electromagnetic induction between adjacent telephone lines. The interference affects the communication state such as the communication speed and stability of the DSL signal, and the influence depends on the relationship between the interference occurrence timing and the start timing of the initialization process, and the magnitude of the interference.

  Taking the case where the telephone line 820 receives interference from the telephone line 821 as an example, it is organized as shown in Table 2 of FIG. Case A in Table 2 is a case where the telephone line 821 starts the initialization process before the telephone line 820. In this case, when the telephone line 820 starts the initialization process, since the interference from the telephone line 821 has already occurred, the telephone line 820 is in a state in which the speed has decreased according to the magnitude of the interference. The link is connected. However, the subsequent communication state of the telephone line 820 changes stably because the link is set at a reduced speed.

  Cases B to E are cases where the telephone line 820 starts the initialization process before the telephone line 821. In these cases, during the initialization process of the telephone line 820, the telephone line 821 is in a link disconnection state, and therefore the amount of interference from the telephone line 821 is relatively small. (Even when the power supply of the home modem of the telephone line 821 is OFF, there is interference because the collective communication device 810 transmits a signal for starting the initialization process.)

  Therefore, the telephone line 820 is in a link connection state at a higher speed than the communication speed of case A. Thereafter, when the telephone line 821 is also in a link connection state, the cases are further classified according to the magnitude of the interference. Case B is a case where the interference from the telephone line 821 in the link connection state is small. In this case, although the stability of the telephone line 820 that is already in the link connection state is somewhat impaired, there is not much influence on the data communication.

  Case C is a case where the magnitude of interference from the telephone line 821 in the link connection state is medium. In this case, the stability of the telephone line 820 is impaired, an error that cannot be corrected by the error correction function on the receiving side occurs sporadically, and data communication may not be performed correctly. However, data communication is in a range that can be sufficiently continued.

  Case D is a state in which errors continuously occur due to larger interference than Case C. In such a case, since the communication quality is not sufficiently secured, a configuration in which the DSL communication apparatus shifts to the link disconnected state and starts the initialization process again is often adopted.

  When the initialization process is started again, the situation is the same as in the case A. Since the interference from the telephone line 821 has already occurred, the telephone line 820 is received from the telephone line 821 when the link state is established. In response to a large interference, the link connection state is reduced in speed, but the subsequent communication state of the telephone line 820 changes stably.

  Case E is a case where the interference from the telephone line 821 in the link connection state is very large. In this case, the stability is greatly impaired so that synchronization information necessary for maintaining the DSL signal communication of the telephone line 820 cannot be normally transmitted. Therefore, the link disconnection state is immediately established, the initialization process is started again as in the case D, and the link connection state with a reduced speed is set according to the magnitude of interference received from the telephone line 821.

  As described above, with respect to the power supply of home communication devices such as home modems, reduction of power consumption that leads to the emission of carbon dioxide is required. However, only when the DSL transmission system is used, such as accessing the Internet as in the past, power is supplied to the home communication device manually, and the power supply is stopped after use. In the method of reducing the amount, a long waiting time is required until the initialization process for setting the link connection state after the power supply of the home communication apparatus is turned ON is completed.

  The present invention reduces the power consumption after use of the in-home communication device without much time and effort by the subscriber (end user), and when the user starts to use the in-home communication device again. The first object is to enable network access to the Internet or the like without waiting time.

  The in-home communication device with a timer function of the present invention includes a timer operation panel having at least a communication start time display unit, a communication start time setting button, and a communication stop button. When the communication stop button is pressed, digital subscriber line signal transmission / reception is performed. Power supply stop means for stopping power supply to the LSI block, and information on the communication start time set by the communication start time setting button are held, and when the communication start time comes, the digital subscriber line signal transmission / reception Link setting means for starting the power supply to the LSI block and setting the link connection.

  In addition, a timer CPU block specialized for the timer function is provided, and power is supplied only to the timer CPU block when the communication stop button is pressed, and the digital subscriber line signal transmission / reception LSI block, LAN connection function block, and the entire apparatus are provided. The power supply to the CPU block to be controlled is stopped, and the timer CPU block holds information of the communication start time set by the communication start time setting button, and when the communication start time is reached, the digital subscriber The power supply to the line signal transmitting / receiving LSI block, the LAN connection function block, and the CPU block for controlling the entire apparatus is started.

  The communication start time information is set according to setting information output by timer operation application software of a personal computer connected via a LAN.

  According to the present invention, the timer function is introduced into the in-home communication device, and the power supply of the DSL signal communication block is stopped when communication is not performed. By supplying power to the DSL signal communication block and automatically executing the initialization process at the communication intention time, it is possible to access the Internet or the like without waiting time at the start of communication.

  In addition, the device described in the above-mentioned Patent Document 1 electrically connects or disconnects the ADSL line by remote control, whereas the present invention is applicable to DSL signal communication such as LSI that performs modulation / demodulation of DSL signal and output control. By stopping the power supply to related parts, the power consumption of the home communication device can be greatly reduced.

  An embodiment of a home communication device with a timer function according to the present invention is shown in FIG. Hereinafter, the home communication device will be described as a home modem. FIG. 1 shows an example of the timer operation panel 100 installed in the home modem 830. The timer operation panel 100 according to the present invention is installed in the home modem 830 in addition to the conventional light emitting diode (LED) group 110 that displays the power supply status and the DSL signal communication status to the home modem 830. The timer operation panel 100 includes a communication start time display unit 120, a communication start time setting button 130, a communication start (ON) time confirmation button 140, and a communication stop (OFF) button 150.

  The time (hour, minute) at which power supply is started to the DSL LSI block configured by the DSL LSI group related to the DSL signal communication in the home modem 830 is set to [hour] [minute] of the communication start time setting button 130. ] Button. Specifically, each time the [hour] button and the [minute] button of the communication start time setting button 130 are pressed, the hour and minute values are increased, and the hour and minute values are displayed in the communication start time display unit 120. indicate.

  When the subscriber confirms the time setting content displayed on the communication start time display unit 120 and presses the communication start (ON) time confirmation button 140, the time setting content is confirmed. The display of the communication start time display unit 120 can be distinguished by blinking when the time is being set with the communication start time setting button 130 and turning on after being confirmed by pressing the communication start (ON) time confirmation button 140. It is desirable to display.

  The time information set here is maintained unless power is not supplied to the home modem 830 by, for example, removing the plug 160 connected to the home modem 830 from the power outlet. In addition, once the communication start (ON) time determination button 140 is pressed, the time is set by the communication start time setting button 130 and then the communication start (ON) time determination button 140 is pressed again. It is also possible to change the time.

  The communication start time setting may be performed during DSL signal communication, or may be performed while DSL signal communication is stopped after the communication stop (OFF) button 150 is pressed. However, as described later, from the viewpoint of reducing the influence on the DSL signal communication due to the interference with the adjacent telephone line, the communication start time is set during the DSL signal communication, and the set time information is gathered by the DSL signal. It is desirable that the communication apparatus 810 be notified.

  When the communication start (ON) time confirmation button 140 is pressed and the communication stop (OFF) button 150 is not pressed and the communication start time is reached while maintaining the communication state, the initialization process is started. The communication state remains maintained.

  FIG. 2 shows a first configuration example of the internal configuration of the home modem 830 according to the present invention. In the figure, a DSL signal transmission / reception LSI block 210 performs DSL signal communication with a collective communication device 810 via a telephone line 820. The DSL signal transmission / reception LSI block 210 is usually a block composed of a plurality of LSIs.

  The LAN connection function block 230 is connected to a personal computer 840 or the like. Data communication is often performed with an in-house device such as a personal computer 840 in the Ethernet (registered trademark) frame format, but it is not necessarily in the Ethernet (registered trademark) frame format. The connection with the personal computer 840 or the like may be wired or wireless. Both of them can be used together, and the LAN connection function block 230 has an LSI configuration suitable for each connection form.

  The CPU block 220 performs frame format conversion between the DSL signal transmission / reception LSI block 210 and the LAN connection function block 230, and only enables data communication between the collective communication device 810 and the personal computer 840 or the like. In addition, each functional unit of the entire device in the home modem 830 is controlled such as blinking control of the light emitting diode (LED) group 110.

  The CPU block 220 is further connected to the timer operation panel 100 and has a function for displaying the time set by the communication start time setting button 130 on the communication start time display unit 120, and information on the set time is transmitted to the DSL signal transmission / reception LSI block. 210 has a function of notifying the collective communication device 810 through 210. Further, under the control of the CPU block 220, power supply to the DSL signal transmission / reception LSI block 210 is started at the time set by the communication start time setting button 130.

  When DSL signal communication is terminated, for example, when the access to the Internet is terminated, the communication block (OFF) button 150 is pressed, and the DSL signal communication is controlled by the CPU block 220 for the power supply system (not shown) in the home modem 830. The power supply to the signal transmission / reception LSI block 210 is stopped, and the DSL signal communication is stopped, whereby the power consumption of the home modem 830 is reduced.

  Since power is continuously supplied to the CPU block 220 and the like other than the DSL signal transmission / reception LSI block 210, a light emitting diode (LED) indicating the power supply state in the light emitting diode (LED) group 110 using this power. ) In a specific color, so that the display can be distinguished from when the plug 160 is removed from the power outlet.

  When the communication stop (OFF) button 150 is pressed again after the communication stop (OFF) button 150 is pressed, the setting of the DSL signal communication OFF is canceled and the setting by the communication start time setting button 130 is performed. The initialization process can be started immediately.

  FIG. 3 shows a second configuration example of the internal configuration of the home modem 830 according to the present invention. In the second configuration example, a timer CPU block 320 specialized for the timer function is provided, and the timer CPU block 320 is connected to the timer operation panel 100. The timer CPU block 320 and the CPU block 220 share information on the communication start set time. As compared with the CPU constituting the CPU block 220, the CPU constituting the timer CPU block 320 can be reduced in size and power consumption because it is specialized in the timer function.

  When the communication stop (OFF) button 150 is pressed, the timer CPU block 320 controls a power supply system (not shown) in the home modem 830 and supplies power to the DSL signal transmission / reception LSI block 210, the CPU block 220, and the LAN connection function block 230. By stopping, power consumption of the home modem 830 can be further reduced compared to the first configuration of FIG.

  At this time, the light emitting diodes (LEDs) indicating the power supply state in the light emitting diode (LED) group 110 may be turned off, but the control may be taken over by the timer CPU block 320 and lighted in a specific color. In the configuration example of FIG. 3, power supply to the DSL signal transmission / reception LSI block 210, the CPU block 220, and the LAN connection function block 230 is started by control of the timer CPU block 320 at the time set by the communication start time setting button 130. Let

  As another third configuration example, the in-home modem 830 in which all CPU functions are arranged in the DSL signal transmission / reception LSI block 210 has a configuration in which the CPU block 220 does not exist. In such a configuration, the timer CPU block 320 as shown in FIG. 3 is provided instead of the configuration of FIG.

  Another embodiment for timer setting according to the present invention is shown in FIG. FIG. 4 shows an example of an operation screen by the timer operation application software 400 in the personal computer 840 connected to the home modem 830 (including wireless connection). The operation screen by the timer operation application software 400 includes a communication start time display unit 420, a communication start time setting button 430, a communication start time confirmation button 440, and a communication stop (OFF) button 450.

  The function of each display image is the same as that of the display unit and buttons of the timer operation panel 100 installed in the home modem 830, and is operated with a mouse or a keyboard (Tab key, return key, etc.). In addition, instead of setting the communication start time by clicking the communication start time setting button 430 and the communication start time confirmation button 440, the cursor is moved to the communication start time display unit 420 and the number of the communication start time is directly input using the keyboard. The communication start time can also be set by pressing the return key.

  The settings by the timer operation application software 400 are as follows: when the communication start time confirmation button 440 is clicked, when the return key is pressed after the numerical value is input to the communication start time display unit 420, and when the communication stop (OFF) button 450 is clicked. Notification is sent to the home modem 830. Further, the setting content by the timer operation application software 400 is reflected in the display of the light emitting diode (LED) indicating the power supply state in the light emitting diode (LED) group 110 in conjunction with the timer operation panel 100.

  In the first configuration example of FIG. 2, the power to the CPU block 220 and the LAN connection function block 230 even when the DSL signal communication is stopped by pressing (or clicking) the communication stop (OFF) button 150 (or 450). Since the supply continues, the setting contents set by the timer operation application software 400 are notified to the home modem 830 and function effectively as usual.

  On the other hand, in the second configuration example of FIG. 3, the setting of the communication start time in the timer operation application software 400 needs to be performed before the communication stop (OFF) button 150 (or 450) is pressed (or clicked). . This is because after the communication stop (OFF) button 150 (or 450) is pressed (or clicked), the power supply to the CPU block 220 and the LAN connection function block 230 is stopped, and the setting contents in the timer operation application software 400 This is because the home modem 830 is not notified. Until power is supplied again to the CPU block 220 and the LAN connection function block 230, the subsequent setting is performed on the timer operation panel 100.

  Incidentally, in these embodiments, when the communication start time set by the timer operation panel 100 or the timer operation application software 400 is reached, power is supplied to the DSL signal transmission / reception LSI block 210 and the initialization process is completed. After that, it becomes a link connection state. Considering that the initialization process may take a maximum of one minute or longer, for example, 2 to 2 of the time set as the communication start time so that the link connection state is established by the communication start time (set time) It is good also as a structure which starts an initialization process from 3 minutes ago.

  Information on the communication start time set by the timer operation panel 100 or the timer operation application software 400 is that the telephone line 820 is in a link connection state when the communication start (ON) time confirmation button 140 (or 440) is pressed (or clicked). If it is, the in-house modem 830 notifies the collective communication device 810 via the telephone line 820.

  The collective communication device 810 controls and monitors the link settings of a plurality of telephone lines. In addition, the collective communication device 810 grasps the communication start time of each of the telephone line 821 and the telephone line 822 adjacent to the telephone line 820, for example. The collective communication apparatus 810 according to the present invention uses the setting information of the communication start time of the telephone lines that interfere with each other in order to reduce the influence on the DSL signal communication due to the fluctuation of the interference amount, and the initial link connection. The transmission quality (S / N ratio) referred to in the conversion process is determined by the method described below.

  An example of a list of DSL signal communication states of telephone lines managed by the collective communication device 810 is shown in Table 1 of FIG. There may be thousands of telephone lines connected to the collective communication device 810, and a set of interfering telephone lines may be a unit unit or a board unit. A list of signal communication status is provided. If the number of telephone lines per unit or board is still too large, it may be divided into finer units according to the amount of interference.

  Table 1 is an example of a list of DSL signal communication states of the telephone lines 820 to 824 that may interfere with each other. In Table 1, “communication” in the communication status column is in a link connection state in which data communication is possible, and “communication setting” is currently in a link disconnection state, but the timer operation panel 100 or timer operation application software In 400, the communication start time setting information is notified to the collective communication device 810, and the link connection state is expected to be established at the set time. Further, “communication disconnection” is a state in which the link communication is disconnected and the communication start time setting information is not notified to the collective communication device 810.

  Although the communication start time is set by the timer operation panel 100 or the timer operation application software 400, the setting is made after the communication stop (OFF) button 150 (or 450) is pressed (or clicked). When the set content is not notified to the collective communication device 810, the communication status column is in a “communication cut off” state. The communication ON setting time field stores the communication start setting time of the telephone line in the “communication setting” state.

  According to Table 1, for example, at 18:00, the initialization process is started on the telephone line 821, and the initialization process shown in FIG. 6 is executed as an example. FIG. 6 is an ADSL ITU recommendation G. This is an initialization process defined in 992.1. In the initialization process, a channel analysis process 630 is performed after the handshake 610 and training 620 processes.

  The channel analysis process 630 includes an S / N ratio measurement process 640. In the present invention, an S / N ratio comparison process 650 is added after the S / N ratio measurement process 640. In the S / N ratio comparison process 650, the measurement result of the S / N ratio measurement process 640 and the lowest value of the S / N ratio measured in the previous link connection state are compared for each DSL subcarrier, and the value is low. Is output as the S / N ratio of each subcarrier referred to in the current link connection. Note that it is also possible to compare a plurality of subcarriers together due to the limitation of the memory amount.

  ITU recommendation G. In 992.1, after the S / N ratio measurement, link setting information such as the number of bits allocated to each subcarrier calculated based on the S / N ratio in the information exchange process 660 is sent to the collective communication device 810. It defines a process for performing link connection by exchanging with the home modem 830. In the present invention, the information exchange process 660 is performed by reflecting the minimum value of the S / N ratio determined by the processing flow shown in FIG. 7 described later in the previous link connection state in the S / N ratio at the time of the current link connection. Execute and perform link connection.

  The past S / N ratio determination process used in the S / N ratio comparison process 650 is shown in FIG. In the case of the telephone line 821, the “past S / N ratio” means the lowest value S recorded in the memory and measured during the initialization process of the telephone line 821 and the link connection state (data communication state). / N ratio, which is the S / N ratio referenced in the initialization process at the next link connection.

  In the state of link connection, as shown in FIG. 7, first, the S / N ratio of the telephone line 821 measured in the S / N ratio measurement process 640 (see FIG. 6) of the initialization process performed at the time of the current link connection. The N ratio is recorded in the memory as an initial value of the past S / N ratio (710). Next, the link connection state of the telephone line 821 is confirmed (720), and if the link connection state is maintained, the S / N ratio is measured in accordance with the communication start set time of the other line (730). In the example of Table 1, the telephone line 822 is expected to be in a link connection state at 20:30, so again at 20:30 (that is, when the telephone line 822 is in a link connection state) The S / N ratio is measured.

  The S / N ratio measurement result measured in the process 730 is compared with the past S / N ratio value recorded in the memory for each subcarrier, and the lower value is overwritten in the memory (740). . It should be noted that a plurality of subcarriers can be handled together due to the limitation of the amount of memory. Then, the process returns to the link connection state confirmation process 720, and the above-described process is repeatedly performed until the telephone line 821 is in a communication disconnected (link disconnected) state.

  When the communication is cut (link cut), the past S / N ratio determination process ends (750), and the S / N ratio recorded in the memory at this time becomes the past S / N ratio. The past S / N ratio is determined. This past S / N ratio is compared with the S / N ratio measured by the S / N ratio measurement process 640 in the S / N ratio comparison process 650 at the next link setup, and the lower value is calculated. The information exchange process 660 is executed to set the link.

  In this way, by performing link setting with reference to the lowest value of the S / N ratio in the previous link connection state, link setting in a stable communication state against fluctuations in the amount of interference from adjacent lines Is possible.

  In the past S / N ratio determination process shown in FIG. 7, the communication start set time once set does not change every day, and the daily SDL use time is based on the assumption that the daily DSL use time is substantially the same. N ratio is determined. If this premise holds, the communication status of the telephone line 821 is the same as that in Case A in Table 2 in spite of fluctuations in the amount of interference from the adjacent line, and communication is performed. The state changes stably. However, when the above assumptions are broken, the case A is not necessarily the case A, but cases D and E in Table 2 are compared with the conventional initialization process that does not reflect the past S / N ratio at all. The probability of being in the state can be reduced.

  As described above, the timer function and the link connection in the stable communication state with respect to the fluctuation of the interference amount of the present invention have been described mainly for the DSL device. However, they apply similarly to other communication devices that require the initialization process. It is possible and application to other communication devices is not limited. In addition, the present invention can be similarly applied to a wireless communication apparatus or the like that is affected by the communication speed or stability due to fluctuations in interference.

It is a figure which shows embodiment of the in-home communication apparatus with a timer function by this invention. It is a figure which shows the 1st structural example of the internal structure of the subscriber | terminal modem by this invention. It is a figure which shows the 2nd structural example of the internal structure of the subscriber | terminal modem by this invention. FIG. 6 is a diagram showing another embodiment of timer setting according to the present invention. It is a figure which shows Table 1 (example of the list of the DSL signal communication state of a telephone line). It is a figure which shows the initialization process of the link connection of ADSL. It is a figure which shows the determination process of the past S / N ratio by comparison of S / N ratio. It is a figure which shows the DSL transmission system with which a collective communication apparatus is installed in a telephone station. It is a figure which shows the DSL transmission system with which a collective communication apparatus is installed between a telephone station and a subscriber's house. It is a figure which shows the far end crosstalk between the telephone lines in a cable. It is a figure which shows Table 2 (example of the table of case division | segmentation of the interference between telephone lines).

Explanation of symbols

DESCRIPTION OF SYMBOLS 100 Timer operation panel 110 Light emitting diode (LED) group 120 Communication start time display part 130 Communication start time setting button 140 Communication start (ON) time confirmation button 150 Communication stop (OFF) button 160 Plug plug 210 DSL signal transmission / reception LSI block 220 CPU block 230 LAN connection functional block 320 Timer CPU block 400 Timer operation application software 420 Communication start time display unit 430 Communication start time setting button 440 Communication start time confirmation button 450 Communication stop (OFF) button 810 Collective communication device 820-824 Telephone line 830 Home modem 840 Personal computer 850 Cable 860-861 Far end crosstalk

Claims (3)

A timer operation panel having at least a communication start time display section, a communication start time setting button, and a communication stop button;
Power supply stop means for stopping power supply to the digital subscriber line signal transmission / reception LSI block when the communication stop button is pressed;
Information on the communication start time set by the communication start time setting button is held, and when the communication start time comes, power supply to the digital subscriber line signal transmission / reception LSI block is started and link connection is set Link setting means,
In-home communication device with timer function. A timer CPU block specialized for the timer function is provided.
Power is supplied only to the timer CPU block when the communication stop button is pressed, and power supply to the digital subscriber line signal transmission / reception LSI block, the LAN connection function block, and the CPU block that controls the entire apparatus is stopped,
The timer CPU block holds communication start time information set by the communication start time setting button, and when the communication start time is reached, the digital subscriber line signal transmission / reception LSI block, a LAN connection function block, 2. The home communication apparatus with a timer function according to claim 1, wherein power supply to a CPU block that controls the entire apparatus is started. Timer function according to information of the communication start time, to claim 1 or claim 2, characterized in that it comprises means for setting according to the setting information output by the timer operation application software of the connected personal computer on the LAN In-home communication device.

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