JP5919165B2 - Slave station apparatus, one-to-N communication system, and slave station apparatus power consumption control program - Google Patents

Description

  The present invention relates to a slave station device, a one-to-N communication system, and a power consumption control program for the slave station device. For example, a subscriber side device (ONU) in a GE-PON (Gigabit Ethernet-Passive Optical Network; Ethernet is a registered trademark) system This can be applied to power saving of an optical network unit).

  Patent Document 1 describes a method for suppressing the power consumption of an ONU in a PON system. Specifically, the transmission unit of the station side apparatus (OLT; Optical Line Terminal) has a downlink buffer unit that accumulates data to be sequentially transmitted to each ONU, and the OLT stores data to be transmitted in the downlink buffer unit. A power saving mode setting frame describing the power saving mode time is transmitted to the empty ONU, and when the ONU receives the power saving mode setting frame, the ONU shifts to the power saving mode and consumes power only for the power saving mode time. Suppress.

JP 2011-182098 A

  However, in the method described in Patent Document 1, as long as data to the own ONU is buffered in the OLT, the ONU cannot shift to the power saving mode, and power consumption may be continued unnecessarily. There is. For example, even when there is no user data from the ONU in the upstream direction, a large amount of power is consumed by many functional units that function in upstream communication.

  Therefore, a slave station device that can further reduce power consumption and a power consumption control program for the slave station device are desired, and a one-to-N communication system to which such a slave station device is applied is desired.

In the first aspect of the present invention, the slave station apparatus in the one-to-N communication system is provided with a transmission permission control signal including one or more transmission permissions including a transmission start time and a transmission amount from the master station apparatus. An uplink signal period recognizing means for recognizing a transmission period of the uplink signal to the master station device based on a transmission permission control signal; and (2) a configuration that functions to transmit the uplink signal and can take a power saving mode. A power consumption control target; and (3) determining a set time and a release time of the power saving mode in the power consumption control target within a period other than the uplink signal transmission period, and at the determined time, the power consumption control target And (4) the power consumption control means has a transmission start time in the transmission permission included in the received transmission permission control signal. From a transmission start time of the earliest transmission permission, in the power control target, the release processing time since release instruction is given to the release is complete, to determine the release time of the power saving mode, (5) The time obtained by adding the transmission amount of the latest transmission permission to the transmission start time of the transmission permission with the latest transmission permission in the transmission permission included in the received transmission permission control signal is set as the set time of the power saving mode. It is characterized by determining .

The power consumption control program for the slave station device according to the second aspect of the present invention is directed to an uplink to the master station device, wherein a transmission permission control signal including one or more transmission permissions including a transmission start time and a transmission amount is given from the master station device. A computer installed in a slave station apparatus in a one-to-N communication system having a power consumption control target capable of taking a power saving mode functioning for signal transmission is: (1) based on the received transmission permission control signal, An uplink signal period recognizing means for recognizing a transmission period of the uplink signal to the apparatus; and (2) determining a set time and a release time of the power saving mode in the power consumption control target within a period other than the uplink signal transmission period. And at the determined time, function as power consumption control means for instructing the power consumption control target to set or cancel the power saving mode, and (3) receive the power consumption control means. The transmission start time of the transmission permission with the earliest transmission start time in the transmission permission included in the transmission permission control signal, and the release processing time from when the release instruction is given to the completion of the release in the power consumption control target. And (4) the amount of transmission permission with the latest transmission permission at the transmission start time with the latest transmission permission among the transmission permissions included in the received transmission permission control signal. The time obtained by adding is determined as the set time of the power saving mode .

In the third aspect of the present invention, the slave station apparatus in the one-to-N communication system is provided with a transmission permission control signal including one or more transmission permissions including a transmission start time and a transmission amount from the master station apparatus. An uplink signal period recognizing means for recognizing a transmission period of the uplink signal to the master station device based on a transmission permission control signal; and (2) a configuration that functions to transmit the uplink signal and can take a power saving mode. A power consumption control target; and (3) determining a set time and a release time of the power saving mode in the power consumption control target within a period other than the uplink signal transmission period, and at the determined time, the power consumption control target And (4) the power consumption control means has a transmission start time in the transmission permission included in the received transmission permission control signal. The time can be obtained by adding the transmission amount of the slowest transmission permission to the transmission start time of the slow transmission permission, and determining the set time of the power saving mode.
A power consumption control program for a slave station device according to a fourth aspect of the present invention is directed to an uplink to the master station device, wherein a transmission permission control signal including one or more transmission permissions including a transmission start time and a transmission amount is given from the master station device. A computer installed in a slave station apparatus in a one-to-N communication system having a power consumption control target capable of taking a power saving mode functioning for signal transmission is: (1) based on the received transmission permission control signal, An uplink signal period recognizing means for recognizing a transmission period of the uplink signal to the apparatus; and (2) determining a set time and a release time of the power saving mode in the power consumption control target within a period other than the uplink signal transmission period. And, at the determined time, function as power consumption control means for instructing the power consumption control target to set or cancel the power saving mode. (3) The power consumption control means The time obtained by adding the transmission amount of the latest transmission permission to the transmission start time of the transmission permission with the latest transmission permission included in the transmission permission included in the transmission permission control signal is determined as the set time of the power saving mode. It is characterized by making it.
5th this invention is at least one part in 1 to N communication system which has several sub_station | mobile_unit apparatus to which the transmission permission control signal which the transmission permission including transmission start time and transmission amount contains 1 or more is given from a master station apparatus. The slave station apparatus according to the first or third aspect of the present invention is applied as the above slave station apparatus.

  According to the slave station apparatus, the one-to-N communication system, and the slave station apparatus power consumption control program of the present invention, the power consumption of the slave station apparatus can be further suppressed.

It is a functional block diagram which shows the structure relevant to the power consumption control function of ONU of embodiment. It is a block diagram which shows the structure of ONU of embodiment. It is a sequence diagram (the 1) which shows the control operation of the power consumption which ONU of embodiment performs. It is a sequence diagram (the 2) which shows the control operation of the power consumption which ONU of embodiment performs. It is explanatory drawing which shows the operation example of ONU of embodiment.

(A) Main Embodiment Hereinafter, an embodiment of a power consumption control program for a slave station apparatus, a 1-to-N communication system, and a slave station apparatus according to the present invention will be described in detail with reference to the drawings. Here, the 1 to N communication system of the embodiment is a GE-PON system, and the slave station device of the embodiment is an ONU in the GE-PON system.

(A-1) Configuration of Embodiment FIG. 2 is a block diagram showing the configuration of the ONU 1. In FIG. 2, one or more (two examples in FIG. 2) UI-side transmission / reception units 21-1, 21-2, a bridge unit 22, OAM (Operation Administration and Management) transmission / reception Unit 23, MPCP (Multi-Point Control Protocol) transmission / reception unit 24, CPU 25, RAM 26, ROM 27, PON transmission unit 28, PON reception unit 29, PON optical transmission / reception unit 30, and power supply unit 31.

  The UI-side transmitting / receiving units 21-1 and 21-2 exchange Ethernet frames, which are user data, with the user network or user terminal.

  The bridge unit 22 performs buffering for transfer to the PON-side network, VLAN-Tag addition / deletion for VLAN (virtual LAN) identification, address learning, priority processing, and continuity monitoring of upstream and downstream frames. And so on.

  The OAM transmission / reception unit 23 and the MPCP transmission / reception unit 24 exchange PON control frames (OAM frames and MPCP frames) necessary for controlling the PON interface. Examples of the MPCP frame include a Gate frame and a Report frame, which will be described later.

  The PON transmission unit 28 supplies a PON control frame such as an OAM frame and an MPCP frame and user data to the PON optical transmission / reception unit 30. The PON transmission unit 28 incorporates an upstream Serdes (SERializer / DESerializer) function unit.

  The PON optical transmission / reception unit 30 converts an electrical signal from the PON transmission unit 28 into an optical signal and transmits it to the PON interface, or converts an optical signal from the PON interface into an electrical signal and gives it to the PON reception unit 29. Is.

  The PON reception unit 29 receives and identifies user data and PON control frames from the PON optical transmission / reception unit 30, and distributes them to the bridge unit 22, the OAM transmission / reception unit 23, and the MPCP transmission / reception unit 24.

  The power supply unit 31 corresponds to an AC / DC converter, a DC / DC converter, and the like, and supplies operating power to each unit of the ONU 1.

  The CPU unit 25 controls each unit of the ONU 1 while applying the setting value stored in the ROM unit 27 according to the program stored in the ROM unit 27 and using the RAM unit 26 as a working memory. is there. The CPU unit 25 incorporates a local timer as will be described later. Further, as a program stored in the ROM unit 27, a power consumption control program (see FIGS. 3 and 4 described later) is stored. Further, a power-down release time register and a power-down setting time register are set in the RAM unit 26 in association with the power consumption control operation.

  FIG. 1 is a functional block diagram showing a configuration related to the power consumption control function of the ONU 1. FIG. 1 is a block diagram showing the functions of the power consumption control program executed by the CPU 25 described above. Of course, all the components shown in FIG. 1 may be realized by hardware.

  In FIG. 1, the ONU 1 is related to the power consumption control function, the MPCP receiving unit 11, the power down control unit 12, the power down release time register 13, the power down setting time register 14, the timer comparison unit 15, the local timer 16 The frame transmission control unit 17 and the power consumption control target 18 are included. Hereinafter, functions related to power consumption control will be described for each of the units 11 to 18.

  The MPCP reception unit 11 corresponds to the reception configuration of the MPCP transmission / reception unit 24 described above, receives a downlink Gate frame transmitted by an OLT (not shown), and grant (transmission permission) information (uplink frame transmission start time) in the Gate frame. And the transmission amount) are provided to the power-down control unit 12 and the frame transmission control unit 17, and the time stamp in the Gate frame is provided to the local timer 16.

  The frame transmission control unit 17 performs uplink frame transmission control for the optical transmission module in the PON optical transmission / reception unit 30 in accordance with the Grant information.

  The local timer 16 is a timer that measures the time in the ONU 1. When the time stamp in the Gate frame is given, the local timer 16 corrects the current time according to the time stamp and synchronizes the time with the OLT.

  The power down control unit 12 determines the power down release time and the power down set time from the Grant information, the power down release processing time, the power down setting processing time, etc., and sets the power down release time in the power down release time register 13. The power down setting time is set in the power down setting time register 14. The power-down control unit 12 causes the power consumption control target 18 to enter the power saving mode when the power-down setting time is reached, and cancels the power saving mode of the power consumption control target 18 when the power-down release time is reached. .

  The power down cancellation time register 13 and the power down setting time register 14 hold the power down cancellation time and the power down setting time, respectively. The power-down setting time register 14 holds the previously calculated power-down setting time in addition to the calculated power-down setting time even when a new power-down setting time is calculated.

  The timer comparison unit 15 compares the current time of the local timer 16 with the power-down release time held in the power-down release time register 13 or the power-down setting time held in the power-down setting time register 14. When the power-down release time or the power-down setting time is reached, the power-down control unit 12 is notified of this.

  The power consumption control target 18 corresponds to a part of the uplink frame transmission configuration. For example, the optical transmission module in the PON optical transmission / reception unit 30 can be the power consumption control target 18 by setting laser oscillation to a standby state. Further, for example, the uplink Serdes function unit in the PON transmission unit 28 can be the power consumption control target 18 by stopping the clock supply to the function unit. The power-down setting processing time described above is a process required for setting from when a power-down instruction is given to a state in which power-down is executed (power-saving mode state) among a plurality of power consumption control targets 18. This is the setting processing time of the power consumption control target 18 with the longest time (setting processing time). Similarly, the power-down release processing time described above is in a state in which power-down is released (power-saving mode release state) from when a power-down release instruction is given among the plurality of power consumption control targets 18. This is the release processing time of the power consumption control target 18 with the longest processing time (release processing time) required for release until

(A-2) Operation of Embodiment Next, the power consumption control operation executed by the ONU 1 of the embodiment will be described with reference to the sequence diagrams of FIGS. 3 and 4. 3 and 4, the portion described as the PON transmission / reception unit 19 corresponds to the portions of the PON transmission unit 28, the PON reception unit 29, and the PON optical transmission / reception unit 30 in FIG. The power-down release time register 13 and the power-down setting time register 14 are described as elements of the power-down control unit 12 or the timer comparison unit 15 in FIGS.

  When a normal Gate frame (downstream Gate frame) transmitted by the OLT 2 arrives at the ONU 1, it is given to the MPCP receiver 11 via the PON transceiver 19 (S 100), and the MPCP receiver 11 determines the transmission start time of the upstream frame. A transmission amount (length) and a time stamp are extracted (S101).

  The MPCP receiver 11 gives the extracted time stamp information to the local timer 16 (S102), and the local timer 16 loads the time stamp information and adjusts the current time to the time stamp information (S103).

  Further, the MPCP receiving unit 11 gives the extracted transmission start time and transmission amount to the power-down control unit 12 and the frame transmission control unit 17 (S104). Thereby, the power-down control part 12 calculates a power-down cancellation | release time and a power-down setting time according to (1) Formula and (2) Formula, respectively (S105). In Expressions (1) and (2), “Multiple Grant” refers to all transmission grants (Grants) included in one Gate frame, and one of those Grants is transmission of a Report frame. (FIG. 5 to be described later shows a case where the first grant of a plurality of grants is a grant related to transmission of a report frame. The power-down release time and the power-down setting time include a plurality of grants in one burst. Therefore, it was decided to calculate with the formulas (1) and (2).

Power-down release time = (Transmission start time of Grant with the earliest transmission start time among a plurality of Grants) -Power-down release processing time (1)
Power-down setting time = (Transmission start time of Grant having the latest transmission start time among a plurality of Grants) + (Transmission amount of Grant having the latest transmission start time) (2)
In the case of the GE-PON system, the transmission start time is expressed by 32 bits using a unit of TQ (1TQ = 16 ns). A 16-bit transmission amount is also given in the same TQ unit. Therefore, the power-down release time and the power-down setting time are also expressed in 32 bits using TQ units. For example, there are now two transmission grants (Grant), the 32-bit transmission start time of the first transmission permission is “5555AAA (TQ)” in hexadecimal notation, and the 16-bit transmission amount is “0088” in hexadecimal notation. (TQ) ”, the 32-bit transmission start time of the second transmission permission is“ 5555BBBB (TQ) ”in hexadecimal notation, and the 16-bit transmission amount is“ 1F00 (TQ) ”in hexadecimal notation. . Further, it is assumed that the power down cancellation processing time is 10 μs, that is, 625 (TQ). 625 (TQ) can be expressed by 12 bits, and the 12 bits are expressed as “271 (TQ)” in hexadecimal notation. In such a case, the power-down release time is obtained by subtracting the power-down release processing time “271 (TQ)” from the transmission start time “5555AAAA (TQ)” of the first transmission permission according to the equation (1). Thus, “5555A839 (TQ)” is obtained, and the power-down setting time is the second transmission permission transmission amount at the second transmission permission transmission start time “5555BBBB (TQ)” according to the equation (2). “1F00 (TQ)” is added to obtain “5555 DABB (TQ)”.

  In the following description, the symbol “T1” is used for the power-down setting time calculated last time, the symbol “T2” is used for the power-down release time calculated this time, and the power-down setting time calculated this time is used. On the other hand, the symbol “T3” is used.

  When the power-down release time and the power-down setting time are calculated as described above, the power-down control unit 12 determines whether or not the current state is the power-down state (power-saving mode state) of the power consumption control target 18. (S106). The period that is not in the power down state is generally a period during execution of transmission permitted in the previous Gate frame (including the power down setting processing time).

  When the current state is the power-down state of the power consumption control target 18, the power-down control unit 12 gives the power-down release time T2 to the timer comparison unit 15 (S107).

  At this time, after setting the power-down cancellation time T2 (S108), the timer comparison unit 15 waits for the value (current time) of the local timer 16 to become the power-down cancellation time T2 (S109, S110). When the current time reaches the power-down release time T2, the timer comparison unit 15 notifies the power-down control unit 12 to that effect (S111), whereby the power-down control unit 12 causes the power consumption in the PON transceiver unit 19 to be consumed. The power down state of the control target 18 is released (S112).

  The MPCP transmission unit (see reference numeral 24 in FIG. 2) waits for the power-down state to be released, and transmits a Report frame corresponding to the Gate frame received in step S100 to the OLT 2 via the PON transmission / reception unit 19 (S113). . Further, if there is user data to be transmitted based on the transmission start time and the transmission amount given in step S104, the frame transmission control unit 17 transmits an upstream frame to the OLT 2 via the PON transmission / reception unit 19 (S114). ).

  The power-down control unit 12 that has obtained the result that it is not in the power-down state by determining whether or not the current state is the power-down state after the calculation of the power-down release time and the power-down setting time is as follows. It is determined whether or not the time difference obtained by subtracting the power-down setting time T1 calculated last time from the down-release time T2 is longer than the power-down setting processing time (S115).

  If the time difference obtained by subtracting the power-down setting time T1 calculated last time from the power-down release time T2 calculated this time is less than the power-down setting processing time, the power-down state is set at the power-down setting time T1 calculated last time. However, before the transition to the power-down state, it is necessary to start the cancellation of the power-down state, and the setting itself becomes meaningless. Therefore, the power-down control unit 12 determines the power-down setting time T3 calculated this time. Is provided to the timer comparison unit 15 (S116). At this time, the timer comparison unit 15 resets the power-down setting time T3 (S117). That is, the power down set time T3 is overwritten on the time T1.

  Thereafter, the timer comparison unit 15 waits for the value of the local timer 16 (current time) to become the power-down setting time T3 (S118, S119), and when the current time becomes the power-down setting time T3, the power-down is performed. The control unit 12 is notified (S120), and the power-down control unit 12 thereby causes the power consumption control target 18 in the PON transmission / reception unit 19 to be in the power-down state (S121).

  If the time difference obtained by subtracting the power-down setting time T1 calculated last time from the power-down release time T2 calculated this time exceeds the power-down setting processing time, it is not in the power-down state when the current Gate frame is received. This is a case where transition to the power saving mode state is possible (during frame output). In this case, the power-down control unit 12 waits until the power-down setting time T1 calculated at the time of receiving the previous Gate frame is reached (S122; refer to Step S134 at the time of receiving the previous Gate frame), and is calculated this time. The power-down cancellation time T2 and the power-down setting time T3 are given to the timer comparison unit 15 (S123).

  At this time, the timer comparison unit 15 first sets the power-down release time T2 (S124), and then waits for the value of the local timer 16 (current time) to reach the power-down release time T2 (S125, S126). When the current time reaches the power-down release time T2, the timer comparison unit 15 notifies the power-down control unit 12 to that effect (S127), whereby the power-down control unit 12 causes the power consumption in the PON transmission / reception unit 19 to be consumed. The power down state of the controlled object 18 is released (S128).

  The MPCP transmission unit (see reference numeral 24 in FIG. 2) waits for the power-down state to be released, and transmits a Report frame corresponding to the Gate frame received in step S100 to the OLT 2 via the PON transmission / reception unit 19 (S129). . Further, if there is user data to be transmitted based on the transmission start time and the transmission amount given in step S104, the frame transmission control unit 17 transmits an upstream frame to the OLT 2 via the PON transmission / reception unit 19 (S130). ).

  When the timer comparison unit 15 notifies the power-down control unit 12 that the current time is the power-down release time T2 (see step S127), the timer comparison unit 15 sets the power-down setting time T3. After the setting (S131), it waits for the value (current time) of the local timer 16 to become the power-down setting time T3 (S132, S133). When the current time becomes the power-down setting time T3, the power-down control is performed. This is notified to the unit 12 (S134), whereby the power-down control unit 12 causes the power consumption control target 18 in the PON transmission / reception unit 19 to be in the power-down state (S135). Thereby, a series of processes at the time of reception of the current Gate frame is ended.

  FIG. 5 is an explanatory diagram illustrating an operation example of the ONU 1 according to the embodiment. FIG. 5 shows, for example, a state in which the PON link between the ONU 1 and the OLT 2 is established, there is no ONU 1 transmission frame, and the optical transmission side is powered down.

  Assume that the Gate frame GF1 arrives at the time t1, the transmission start time in the Gate frame GF1 is t3, and the transmission amount is a period required for transmitting the Report frame (see t3 to t4). The power-down cancellation time calculated based on the arrival of the Gate frame GF1 is the time t2 that is the power-down cancellation processing time TOFF before the transmission start time t3, and the power-down setting time calculated when the Gate frame GF1 arrives is the transmission start time It is time t4 obtained by adding only the transmission amount to time t3, and the time when the setting of the power down state is completed is time t5 obtained by adding the power down setting processing time TON to time t4. Therefore, the arrival of the Gate frame GF1 at time t1 causes the power-down cancellation PDOFF to be performed at time t2, and the report frame RF1 from the transmission start time t3 included in the Gate frame GF1 after the cancellation of the power-down state is completed. Is transmitted to the OLT 2, the power down setting PDON is performed at the transmission end time t4, and the power down state (power saving mode state) is entered from the time t5 when the setting of the power down state is completed.

  Assume that the Gate frame GF2 arrives at time t6. The Gate frame GF2 includes two grants, a grant related to the report frame and a grant related to the user data, and the grant related to the report frame is faster. The power-down cancellation time calculated based on the arrival of the Gate frame GF2 is a time t7 that is a power-down cancellation processing time TOFF before the transmission start time of the Report frame. At this time t7, the power-down cancellation PDOFF is performed, and the power down The Report frame RF2 is transmitted to the OLT 2 from the transmission start time t8 included in the Gate frame GF1 after the release of the state is completed. The user data UD2 is transmitted from the transmission start time t9 included in the Gate frame GF2 by the transmission amount included in the Gate frame GF2. The power-down setting time calculated based on the arrival of the Gate frame GF2 is a time t9 obtained by adding the transmission amount to the transmission start time of the user data UD2, and at this time t9, the power-down setting PDON is performed, The power-down state (power saving mode state) starts at time t10 when the setting is completed.

  Assume that the Gate frame GF3 arrives at time t11. The Gate frame GF3 includes two grants, a grant related to the report frame and a grant related to the user data, and the grant related to the report frame is faster. The power-down cancellation time calculated based on the arrival of the Gate frame GF3 is a time t12 that is the power-down cancellation processing time TOFF before the transmission start time of the Report frame. At this time t12, the power-down cancellation PDOFF is performed, and the power down The Report frame RF3 is transmitted to the OLT 2 from the transmission start time t13 included in the Gate frame GF3 after the release of the state is completed.

  The user data UD3 is transmitted by the transmission amount included in the Gate frame GF3 from the transmission start time t14 included in the Gate frame GF3. Assume that the next Gate frame GF4 arrives at time t15 during transmission of the user data UD3. It is assumed that the Gate frame GF4 includes only Grant related to the Report frame.

  In this case, the time difference between the power-down setting time t16 determined by the arrival of the Gate frame GF3 and the power-down cancellation time t17 determined by the arrival of the Gate frame GF4 is the power-down setting processing time and the power-down cancellation processing time. It is determined whether or not the total time is exceeded (step S115 described above). This determination is made with reference to FIG. 5. The time during which power-down may be performed between the transmission end time t16 of the user data UD3 and the transmission start time t17 of the Report frame RF4 (power-down setting processing time and power-down). This means that a determination is made as to whether or not (the power-down is possible). FIG. 5 shows a case where there is no time when power down is possible, and the power down setting based on the arrival of the Gate frame GF3 is omitted, and at the transmission end time t18 of the Report frame RF4 based on the arrival of the Gate frame GF4. , A power-down setting based on the arrival of the Gate frame GF4 is made.

(A-3) Effect of Embodiment According to the above-described embodiment, in the ONU 1 in the GE-PON system, an optical transmission module or the like is transmitted in a period in which no frame is transmitted upstream regardless of whether there is downlink data to itself. Since the power consumption control target can be powered down, the power consumption can be greatly reduced as compared with the prior art.

(B) Other Embodiments In the above embodiment, when there are a plurality of grants in one gate frame, a case where a plurality of grants are processed as one burst has been described. However, a plurality of grants are included in one gate frame. In some cases, the power-down control and power-down setting of the power consumption control target may be performed for each grant. In this case, the power-down time is increased as compared with the above embodiment, thereby further reducing power consumption. Can do. In this case, it is necessary to determine whether or not power down is possible not for each Gate frame but for each Grant. For example, according to this modified embodiment, there is a possibility that the power can be reduced between the transmission end time of the Report frame RF3 in FIG. 5 and the transmission start time of the user data UD3.

  In the above embodiment, the present invention is applied to the ONU of the GE-PON system. However, if the transmission permission including the transmission start time and the transmission amount is given from the OLT to the ONU, the ONU of the GE-PON system The invention can be applied. Further, the present invention can be applied to any one-to-N communication system in which a master station device and a plurality of slave station devices are connected like a PON system, and the master station device and the slave station device are not limited to OLTs and ONUs. Further, the technical idea of the present invention can be applied to a 1-to-N communication system in which a signal flowing through a communication path is an electrical signal.

  DESCRIPTION OF SYMBOLS 1 ... ONU (subscriber side apparatus; slave station apparatus), 2 ... OLT (station side apparatus; master station apparatus), 11 ... MPCP receiving part, 12 ... Power down control part, 13 ... Power down cancellation time register, 14 ... Power down setting time register, 15... Timer comparison unit, 16 local timer, 17 frame transmission control unit, 18 power consumption control target.

Claims (8)

In the slave station apparatus in the one-to-N communication system in which a transmission permission control signal including one or a plurality of transmission permissions including a transmission start time and a transmission amount is given from the master station apparatus,
Based on the received transmission permission control signal, uplink signal period recognizing means for recognizing the transmission period of the uplink signal to the master station device,
A power consumption control target that is configured to function for transmission of the uplink signal and can take a power saving mode;
Within a period other than the uplink signal transmission period, the set time and release time of the power saving mode in the power consumption control target are determined, and at the determined time, the power saving mode is set or released to the power consumption control target. Power consumption control means for instructing
The power consumption control means includes a transmission start time of transmission permission having the earliest transmission start time among transmission permissions included in the received transmission permission control signal, and a release instruction in the power consumption control target. Determine the power saving mode release time from the release processing time until release is completed ,
The time obtained by adding the transmission amount of the latest transmission permission to the transmission start time of the transmission permission with the latest transmission permission in the transmission permission included in the received transmission permission control signal is set as the set time of the power saving mode. A slave station device characterized by deciding . In the slave station apparatus in the one-to-N communication system in which a transmission permission control signal including one or a plurality of transmission permissions including a transmission start time and a transmission amount is given from the master station apparatus,
Based on the received transmission permission control signal, uplink signal period recognizing means for recognizing the transmission period of the uplink signal to the master station device,
A power consumption control target that is configured to function for transmission of the uplink signal and can take a power saving mode;
Within a period other than the uplink signal transmission period, the set time and release time of the power saving mode in the power consumption control target are determined, and at the determined time, the power saving mode is set or released to the power consumption control target. Power consumption control means for instructing
The power consumption control means, the time obtained by adding the transmission amount of the latest transmission permission to the transmission start time of the latest transmission permission among the transmission permission included in the received transmission permission control signal, A slave station device that is determined at the set time of the power saving mode. The power consumption control means determines a set time and a release time of the power saving mode for the power consumption control target for each transmission permission even when there are a plurality of transmission permissions included in the received transmission permission control signal. The slave station apparatus according to claim 1 or 2 , characterized in that. If the difference between the determined power saving mode setting time and the subsequent determined power saving mode release time does not exceed the predetermined time, the power consumption control means determines the determined power saving mode setting time. The slave station apparatus according to any one of claims 1 to 3 , wherein the setting according to (2) and the subsequent release at the determined power saving mode release time are omitted. The slave station apparatus according to any one of claims 1 to 4 , wherein the slave station apparatus is an ONU in a GE-PON system. A power consumption control target capable of taking a power saving mode functioning for transmission of an uplink signal to the parent station device, wherein a transmission permission control signal including one or more transmission permissions including a transmission start time and a transmission amount is given from the parent station device. A computer mounted on a slave station device in a 1-to-N communication system having
Based on the received transmission permission control signal, uplink signal period recognizing means for recognizing the transmission period of the uplink signal to the master station device,
Within a period other than the uplink signal transmission period, the set time and release time of the power saving mode in the power consumption control target are determined, and at the determined time, the power saving mode is set or released to the power consumption control target. Function as a power consumption control means for instructing
From the time when the power consumption control means is given the transmission start time of the transmission permission with the earliest transmission start time in the transmission permission included in the received transmission permission control signal, and the release instruction in the power consumption control target From the release processing time until release is completed, let the power saving mode release time be determined ,
The time obtained by adding the transmission amount of the latest transmission permission to the transmission start time of the transmission permission with the latest transmission permission in the transmission permission included in the received transmission permission control signal is set as the set time of the power saving mode. A power consumption control program for a slave station device, characterized in that the program is determined. A power consumption control target capable of taking a power saving mode functioning for transmission of an uplink signal to the parent station device, wherein a transmission permission control signal including one or more transmission permissions including a transmission start time and a transmission amount is given from the parent station device. A computer mounted on a slave station device in a 1-to-N communication system having
Based on the received transmission permission control signal, uplink signal period recognizing means for recognizing the transmission period of the uplink signal to the master station device,
Within a period other than the uplink signal transmission period, the set time and release time of the power saving mode in the power consumption control target are determined, and at the determined time, the power saving mode is set or released to the power consumption control target. Function as a power consumption control means for instructing
A time obtained by adding the transmission amount of the latest transmission permission to the transmission start time of the transmission permission having the latest transmission permission in the transmission permission included in the received transmission permission control signal to the power consumption control means, A power consumption control program for a slave station device, characterized in that it is determined as a set time of a power saving mode. In a one-to-N communication system having a plurality of slave station devices to which a transmission permission control signal including one or a plurality of transmission permissions including a transmission start time and a transmission amount is given from the master station device,
As at least a part of said child station device, one-to-N communication system, characterized in that the application of the slave station apparatus according to any one of claims 1-5.

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