JP5909297B1 - Terminal station apparatus and terminal station receiving method - Google Patents

Abstract

The present invention provides a transmission / reception function unit that accommodates a passive optical communication network, and includes the same functional unit, so that the more the terminal device accommodates more passive optical communication networks, the more passive The number of transmission / reception function units corresponding to the optical communication network is increased, the number of functions is unnecessarily increased by the number of transmission / reception function units, a large number of buffers are required for transmission to the higher-level communication network, and the cost of the terminal equipment increases. The purpose is to solve the problem. A terminal device 91 according to the present invention includes an optical reception unit 111, a decoding unit 112, a distribution unit 114, and an uplink transmission timing control unit 115 for each passive optical communication network. The terminal device 91 according to the present invention includes multiplexing units 121, 122, and 123, a concentrated uplink transmission timing control unit 125, and a control signal processing unit 13 that are shared by all passive optical communication networks. [Selection] Figure 6

Description

  The present invention relates to a terminal station apparatus and a terminal station apparatus reception method.

  In a passive optical communication network in which a terminal station device and a plurality of subscriber line terminators are connected, communication between the terminal station device and the subscriber line terminator is time division multiplexed. Communication between a terminal station device and a subscriber line terminal device is realized using a control protocol called MPCP (Multi-Point Control Protocol) as described in Non-Patent Document 1, for example. Such a passive optical communication network can provide a service at low cost since one terminal device is shared by a plurality of users.

  In addition, a single terminal device accommodates a plurality of passive optical communication networks, and further a concentration function unit is provided in the terminal device to allocate bandwidth to subscriber line termination devices accommodated in the plurality of passive optical communication networks. By performing the collective function in the terminal station device in a lump, it is possible to reduce the number of connection ports on the core network side, simplify wiring and consolidate the control units, and further reduce costs. However, when band allocation is performed collectively for subscriber line termination devices accommodated in multiple passive optical networks, unused bands are generated in other passive optical networks while one passive optical network is transmitting upstream signals. Therefore, the bandwidth utilization efficiency per user for each passive optical communication network is reduced. Further, factors that reduce the bandwidth utilization efficiency per user for each passive optical communication network include addition of burst overhead (B-OH) to a burst signal and addition of FEC (Forward Error Correction) parity.

  FIG. 1 shows parity and B-OH in a burst signal. The burst signal has B-OH and a code word that is an FEC code word. The burst signal may further include a synchronization bit, disconnection data, and the like. Of the B-OH, the burst rising part is transmitted before the code word, and the burst end part is transmitted after the code word. The code word has a payload including transmission data transmitted from the subscriber line terminating device to the terminal device, and a parity which is an FEC parity. Here, in a burst signal including N codewords, a portion from a payload transmission start time in the first codeword to a parity transmission end time in the Nth codeword is referred to as a “codeword portion”. .

  First, the reason why the band utilization efficiency is reduced by adding B-OH will be described. As shown in FIG. 1, the burst signal has B-OH at the beginning and end of the signal in addition to the code word portion. Here, B-OH is assumed to be a signal such as laser ON, laser pattern, burst delimiter, or laser OFF, but may be other than this. From the above, in addition to the codeword portion, an upstream band is required to transmit B-OH, so that the substantial upstream bandwidth utilization efficiency is lowered in the passive optical communication network.

  Next, the reason why the band use efficiency is reduced by adding the FEC parity will be described. For example, when the subscriber line termination device performs FEC (Forward Error Correction) coding on the uplink signal, a redundant code for FEC such as parity is added, and a band for the redundant code is required for the uplink signal. For this reason, the substantial band use efficiency for every passive optical communication network falls.

  As a means for solving the decrease in bandwidth utilization efficiency associated with the addition of B-OH, for example, there is Burst Overhead Overlapping (hereinafter referred to as B-OH multiple bandwidth allocation method) in Non-Patent Document 2. The B-OH multiple band allocation method performs band allocation that superimposes the total transmission time of B-OH in the upstream signal of one passive optical communication network and the transmission time of the upstream signal of another passive optical communication network. . Thereby, the B-OH multiple band allocation method improves the band utilization efficiency when transferred from the terminal station apparatus to the higher-level communication network.

  Further, as a means for solving the decrease in band use efficiency due to the addition of FEC parity, for example, there is a band allocation method (hereinafter referred to as FEC multiple band allocation method) disclosed in Patent Document 3. The FEC multiple band allocation method performs band allocation that superimposes the total transmission time for the FEC parity in the uplink signal of one passive optical communication network and the transmission time of the uplink signal of another passive optical communication network. Thereby, the FEC multiple band allocation method improves the band utilization efficiency when transferred from the terminal device to the higher-level communication network.

  A terminal apparatus comprising a bandwidth allocation method (hereinafter referred to as a B-OH and FEC multiple bandwidth allocation method) for simultaneously performing a B-OH multiple bandwidth allocation method and / or an FEC multiple bandwidth allocation method related to the present invention For example, a terminal device 91 as shown in FIG. The terminal device 91 in FIG. 2 includes a plurality of transmission / reception function units 11 # 1 to #m and a line concentration function unit 12.

  The functional blocks that the transmission / reception function unit 11 has will be described. The transmission / reception function units 11 of # 1 to #m include an optical reception unit 111, a decoding unit 112, a distribution unit 114, an uplink transmission timing control unit 115, and a control signal processing unit 113, respectively. The optical receiving unit 111 has a function of converting the burst signal SAB from the passive optical communication networks # 1 to #m connected by the wirings 20-1 to 20-m into an electric signal and transferring the electric signal to the decoding unit 112. The decoding unit 112 decodes the encoded input signal SAB, removes the B-OH and FEC parity from the decoded burst signal to obtain a signal SAA in which the payload portion is extracted, and transfers the signal SAA to the distribution unit 114. It has a function.

  The distribution unit 114 has a function of transferring the data signal SD in the input signal SAA to the multiplexing unit 121 of the line concentration function unit 12 and a function of transferring the MPCP Report signal RM to the uplink transmission timing control unit 115 of each transmission / reception function unit 11. And a function of transferring a non-data signal (hereinafter referred to as a control signal SC) other than the MPCP Report to the control signal processing unit 113. As the control signal, a Register Request signal and an OAM (Operations, Administrations, and Maintenance) signal transmitted from the subscriber line termination device 92 at the time of new registration of the subscriber line termination device 92 are assumed, but other non-data signals may be used. I do not care.

  The uplink transmission timing control unit 115 provided in the transmission / reception function units 11 of # 1 to #m has a function of transferring the MPCP Report signal RM to the multiplexing unit 122 of the line concentration function unit 12. Control signal processing sections 113 # 1 to #m have a function of processing received control signal SC.

  A functional block included in the line concentrator 12 will be described. The line concentrating function unit 12 includes a multiplexing unit 121, a multiplexing unit 122, and a line concentration uplink transmission timing control unit 125. The multiplexing unit 121 temporally multiplexes the signal SD stored in the buffer with a buffer function that temporarily holds the signals SD received from a plurality of ports, and transfers the multiplexed signals to the upper communication network via the wiring 20-n. It has a function. The multiplexing unit 122 has a buffer function that temporarily holds signals RM received from a plurality of ports, and a function that temporally multiplexes the signals RM stored in the buffer and transfers the signals to the concentrated uplink transmission timing control unit 125. Have. The concentric uplink transmission timing control unit 125 executes a B-OH multiple band allocation method, an FEC multiple band allocation method, or a B-OH and FEC multiple band allocation method to the transmission / reception function units 11 of # 1 to #m. It has a function.

  A B-OH multiple band allocation method will be described with reference to FIG. The B-OH multiple band allocation method has a transmission permission amount allocation procedure and a transmission start time allocation procedure in order. Here, from the passive optical communication network # 1, as shown in FIG. 3A, a burst signal SAB # 1 including one codeword (codeword # 1-1) in the codeword portion is connected to the wiring 20-. 1 is transmitted. From the passive optical communication network #m, as shown in FIG. 3B, a burst signal in which three code words (code words # m-1, # m-2, # m-3) are included in the codeword part. SAB # m is transmitted via the wiring 20-m.

  First, a transmission permission amount allocation procedure in the B-OH multiple band allocation method will be described. As an example of transmission permission amount allocation, a method of allocating a transmission permission amount to each transmission / reception function unit 11 in accordance with a ratio of the sum of transmission request amounts from subscriber line termination devices 92 accommodated by the transmission / reception function unit 11 However, other methods may be used.

  Next, a transmission start time allocation procedure in the B-OH multiple band allocation method will be described. The concentric uplink transmission timing control unit 125 first calculates the total time Tb of the B-OH transmission times of the burst rising part and burst ending part included in the burst signal SAB # m. Subsequently, as shown in FIGS. 3A and 3B, the concentric upstream transmission timing control unit 125 determines that the burst signal SAB # 1 to be transmitted first and the burst signal SAB # m to be transmitted next are The timing for transmitting the burst signal SAB # m is determined so that it overlaps with time Tb at the maximum.

  The FEC multiple band allocation method will be described with reference to FIG. The FEC multi-band allocation method includes a transmission permission amount allocation procedure and a transmission start time allocation procedure in order. Here, as shown in FIG. 4A, from the passive optical communication network # 1, the burst signal SAB # 1 including one codeword (codeword # 1-1) in the codeword portion is connected to the wiring 20-1. Sent through. From the passive optical communication network #m, as shown in FIG. 4B, a burst signal in which three code words (code words # m-1, # m-2, # m-3) are included in the codeword part. SAB # m is transmitted via the wiring 20-m.

  First, a transmission permission amount allocation procedure in the FEC multiple band allocation method will be described. As an example of a transmission permission amount assignment procedure, a transmission permission amount is assigned to each transmission / reception function unit 11 in accordance with the ratio of the total transmission request amounts from the subscriber line termination devices 92 accommodated by the transmission / reception function unit 11. Although a method is mentioned, other methods may be used.

  Next, a transmission start time allocation procedure in the FEC multiple band allocation method will be described. The concentrated uplink transmission timing control unit 125 first calculates the total time Tf of the transmission times of the FEC parity (parity # m-1, # m-2, # m-3) included in the burst signal SAB # m. Subsequently, as shown in FIGS. 4A and 4B, the concentric upstream transmission timing control unit 125 determines that the burst signal SAB # 1 to be transmitted first and the burst signal SAB # m to be transmitted next are The timing for transmitting the burst signal SAB # m is determined so that it overlaps with time Tf at the maximum.

  The B-OH and FEC multiple band allocation method will be described with reference to FIG. The B-OH and FEC multi-band allocation method includes a transmission permission amount allocation procedure and a transmission start time allocation procedure in order. Here, as shown in FIG. 5A, burst signal SAB # 1 including one codeword (codeword # 1-1) in the codeword portion is transmitted from passive optical network # 1. . From the passive optical communication network #m, as shown in FIG. 5B, a burst signal including three code words (code words # m-1, # m-2, # m-3) in the code word portion. SAB # m is transmitted.

  First, a transmission permission amount allocation procedure in the B-OH and FEC multiple band allocation method will be described. As an example of a transmission permission amount assignment procedure, a transmission permission amount is assigned to each transmission / reception function unit 11 in accordance with the ratio of the total transmission request amounts from the subscriber line termination devices 92 accommodated by the transmission / reception function unit 11. Although a method is mentioned, other methods may be used.

  Next, a transmission start time allocation procedure in the B-OH and FEC multiple band allocation method will be described. The concentric uplink transmission timing control unit 125 firstly adds the total time Tb of the B-OH transmission time included in the burst signal SAB # m and the FEC parity (parity # m-1, #) included in the burst signal SAB # m. The total transmission time Tf of m-2, # m-3) is calculated. Subsequently, as shown in FIGS. 5A and 5B, the concentric uplink transmission timing control unit 125 includes the burst signal SAB # 1 to be transmitted first and the burst signal SAB # m to be transmitted next. The timing for transmitting the burst signal SAB # m is determined so that the time (Tb + Tf) overlaps at the maximum.

  Here, the B-OH multiple band in which the concentric uplink transmission timing control unit 125 assigns the transmission permission amount and the transmission start time to all the subscriber line termination devices 92 accommodated in the terminal station device 91 at once. Although the allocation method, the FEC multiband allocation method, and the B-OH and FEC multiband allocation method have been introduced, other methods are also conceivable. A band allocation method for superimposing the B-OH transmission time of the signal transmitted from the subscriber line termination device 92 belonging to different passive optical communication networks, the FEC parity transmission time, or the sum of the transmission times of both; If so, the configuration of the terminal device 91 is not limited to the above example.

  For example, the concentric uplink transmission timing control unit 125 allocates a transmission permission amount and a transmission start time for each uplink transmission timing control unit 115, and based on this, the uplink transmission timing control unit 115 A bandwidth allocation method is also conceivable in which a transmission permission amount and a transmission start time are allocated to the subscriber line terminating device 92 accommodated in the transmission timing control unit 115. This method can reduce the calculation load of the concentric uplink transmission timing control unit 125 as compared with the collective band allocation method.

  In order to further reduce the calculation load on the concentric uplink transmission timing control unit 125, the concentric uplink transmission timing control unit 125 gives only the transmission permission amount or only the transmission start time to each uplink transmission timing control unit 115. Based on this, the uplink transmission timing control unit 115 assigns a transmission permission amount and a transmission start time to the subscriber line terminating device 92 accommodated in the uplink transmission timing control unit 115. An allocation method is also conceivable. However, when the concentric uplink transmission timing control unit 125 does not assign a transmission start time to each uplink transmission timing control unit 115, a large buffer is provided in the multiplexing unit 121 and the multiplexing unit 122 in order to correspond to a signal arriving at the same time. Is required. Further, when the concentric uplink transmission timing control unit 125 does not assign a transmission permission amount to each uplink transmission timing control unit 115, a large amount of signals are concentrated in the multiplexing unit 121 or the multiplexing unit 122, and some signals are buffered. There is a possibility of overflowing.

  Alternatively, a terminal device 91 that executes the band allocation method without providing the concentrated uplink transmission timing control unit 125 is also conceivable. In this terminal device 91, the MPCP Report signal RM is shared between the uplink transmission timing control units 115 provided in the transmission / reception function units 11 of # 1 to #m, and one or a plurality of uplink transmission timing control units 115 are provided. The bandwidth allocation method is executed, and the transmission permission amount and the transmission start time, only the transmission permission amount, or only the transmission start time are notified to the other uplink transmission timing control unit 115. In the case of this terminal station 91, the cost reduction can be realized by reducing the concentrated uplink transmission timing control unit 125 which is a function of the terminal station 91.

  However, the terminal device 91 shown in FIG. 2 includes the same functional unit such as the control signal processing unit 113 for each transmission / reception functional unit 11 that accommodates the passive optical communication network. For this reason, the more the terminal equipment 91 accommodates more passive optical communication networks, the more the number of transmission / reception function units 11 corresponding to the accommodated passive optical communication network increases, and the number of transmission / reception function units 11 controls signal processing. There is a problem that the number of functions of the unit 113 and the like increases unnecessarily, and the cost of the terminal device 91 increases. There is also a problem that a large number of buffers are required for transmission from the multiplexing unit 121 to the upper communication network.

Japanese Patent No. 554087

IEEE Std. 802.3-2012 H. Ou, Y .; Sakai, KI. Suzuki, and N.A. Yoshimoto, ‘Integrated dynamic bandwidth allocation conversing overhead in passive optical network’, Asia-Pacific Conf. on Commun. , Bali, Indonesia, August 2013, pp. 357-361

  In the present invention, as the terminal device accommodates more passive optical communication networks, the number of transmission / reception function units corresponding to the accommodated passive optical communication network increases, and the number of functions increases unnecessarily by the number of transmission / reception function units. It is an object of the present invention to solve the problem of requiring a large number of buffers for transmission to a higher-level communication network and increasing the cost of a terminal device.

  In order to solve the above-described problems, the present invention shares some functions of a plurality of transmission / reception function units included in the terminal device between the transmission / reception function units.

  Specifically, the terminal device according to the present invention includes a plurality of optical receivers that accommodate one or more subscriber line terminators, controls the uplink transmission timing of the subscriber line terminators, and A terminal device for transferring transmission data contained in a burst signal transmitted from a subscriber line terminating device to a higher-level communication network, wherein the plurality of optical receivers receive the burst signal transmitted from the subscriber line terminating device. And each burst signal received by the plurality of optical receiving units, a plurality of decoding units for decoding each burst signal received by the optical receiving unit, and included in each burst signal decoded by the decoding unit, The transmission data transmitted from the subscriber line termination device, the information related to the transmission data for determining the timing at which the subscriber line termination device transmits a signal to the optical receiver, and the subscriber line termination device The control signal for performing the control is included in the reception signals of the plurality of distribution units that are separated for each burst signal received by the optical reception unit and the plurality of optical reception units that are output from the plurality of distribution units A data signal multiplexing unit that multiplexes the transmitted data to be transferred to a higher-level communication network, and the subscription based on information about the transmission data included in reception signals of the plurality of optical reception units output from the distribution unit The optical signal timing for transmitting the signal to the optical receiver by the subscriber line termination device is set so that the transmission time of the portion of the burst signal that is not transferred in a burst overlaps between the plurality of optical receivers. Concentration uplink transmission timing control unit assigned to each reception unit, and uplink transmission timing assigned from the concentration uplink transmission timing control unit to each optical reception unit A plurality of uplink transmission timing control units to be assigned to each of the subscriber line terminating devices accommodated in the optical receiving unit, and the control signals output from the distributing unit, and accommodated in the plurality of optical receiving units. A control signal processing unit for executing control on the subscriber line terminating device.

  Specifically, the terminal device according to the present invention includes a plurality of optical receivers that accommodate one or more subscriber line terminators, controls the uplink transmission timing of the subscriber line terminators, and A terminal device for transferring transmission data contained in a burst signal transmitted from a subscriber line terminating device to a higher-level communication network, wherein the plurality of optical receivers receive the burst signal transmitted from the subscriber line terminating device. And each burst signal received by the plurality of optical receiving units, a plurality of decoding units for decoding each burst signal received by the optical receiving unit, and included in each burst signal decoded by the decoding unit, The transmission data transmitted from the subscriber line termination device and the information related to the transmission data for determining the timing at which the subscriber line termination device transmits a signal to the optical reception unit are received by the optical reception unit. A plurality of distribution units that are separated for each burst signal, and a data signal that multiplexes the transmission data included in the reception signals of the plurality of optical reception units output from the plurality of distribution units and transfers the multiplexed data to a higher-level communication network Based on information related to the transmission data included in the received signals of the plurality of optical receiving units transferred from the multiplexing unit and the distributing unit, the subscriber line terminator transmits an uplink signal to the optical receiving unit An uplink transmission timing control unit that assigns timing to each of the subscriber line termination devices so that transmission times of portions of the burst signal that are not transferred in bursts overlap between the plurality of optical receiving units. .

  In the terminal device according to the present invention, the plurality of distribution units send a control signal included in the burst signal received by the optical receiving unit for controlling the subscriber line terminating device to the optical receiving unit. A control signal that is further separated for each received burst signal and that controls the subscriber line termination device accommodated in the plurality of optical reception units based on the control signal output from the plurality of distribution units A processing unit may be further provided.

  Specifically, the terminal device according to the present invention includes a plurality of optical receivers that accommodate one or more subscriber line terminators, controls the uplink transmission timing of the subscriber line terminators, and A terminal device for transferring transmission data contained in a burst signal transmitted from a subscriber line terminating device to a higher-level communication network, wherein the plurality of optical receivers receive the burst signal transmitted from the subscriber line terminating device. A plurality of decoding units for decoding each burst signal received by the plurality of optical receiving units for each burst signal received by the optical receiving unit, and a decoding for multiplexing the signals output from the plurality of decoding units The transmission data transmitted from the subscriber line terminator included in the signal multiplexed by the signal multiplexer and the decoded signal multiplexer, and the timing at which the subscriber line terminator transmits a signal to the optical receiver The transmission data to be determined and the control signal for controlling the subscriber line terminating device are separated by a predetermined method, and the transmission data is transferred to a higher-level communication network, and output from the distribution unit Based on the information related to the transmitted data, the transmission time of the uplink signal timing at which the subscriber line terminating device transmits a signal to the optical receiving unit, the portion of the burst signal that is not transferred in a burst, is the plurality of times. Based on the uplink transmission timing control unit assigned to each of the subscriber line termination devices and the control signal output from the distribution unit so as to overlap each other in the plurality of optical reception units. A control signal processing unit that executes control on the subscriber line terminating device.

  In the terminal device according to the present invention, the second optical receiving unit that receives the burst signal transmitted from the subscriber line terminating device, and the burst signal received by the second optical receiving unit, A second decoding unit that decodes each burst signal received by the two optical reception units, and the transmission data, information about the transmission data, and the control signal included in the signal decoded by the second decoding unit. The control signal processing further comprising: a second distribution unit that separates; and a data signal multiplexing unit that multiplexes the transmission data output from the distribution unit and the second distribution unit and transfers the multiplexed data to a higher-level communication network. The unit is accommodated in the subscriber line termination device and the second optical receiving unit accommodated in the plurality of optical receiving units based on the control signals output from the distributing unit and the second distributing unit. Is The uplink transmission timing control unit executes control on the subscriber line termination device, and the subscriber line termination device is configured based on information on the transmission data output from the distribution unit and the second distribution unit. The transmission time of the portion of the burst signal that is not transferred in a burst, the transmission timing of transmitting the signal to the optical receiving unit and the second optical receiving unit of the accommodation destination, the plurality of optical receiving units and You may allocate for every said subscriber line termination device so that it may overlap between 2nd optical receiving parts.

  Specifically, the terminal device according to the present invention includes a plurality of optical receivers that accommodate one or more subscriber line terminators, controls the uplink transmission timing of the subscriber line terminators, and A terminal device for transferring transmission data contained in a burst signal transmitted from a subscriber line terminating device to a higher-level communication network, wherein the plurality of optical receivers receive the burst signal transmitted from the subscriber line terminating device. A reception signal multiplexing unit that multiplexes each burst signal received by the plurality of optical reception units, a decoding unit that decodes a signal output from the reception signal multiplexing unit, and a signal decoded by the decoding unit The transmission data transmitted from the subscriber line termination device, the information related to the transmission data for determining the timing at which the subscriber line termination device transmits a signal to the optical receiver, and the subscriber line Based on information relating to the transmission data for each subscriber line termination device output from the distribution unit that separates control signals for controlling end devices and transfers the transmission data to a higher-level communication network Thus, the transmission time of the portion of the burst signal that is not transferred in a burst is overlapped between the plurality of optical receivers with respect to the upstream signal timing at which the subscriber line terminator transmits a signal to the optical receiver. And an uplink transmission timing control unit to be assigned to each subscriber line termination device, and a control for the subscriber line termination device accommodated in the plurality of optical reception units based on the control signal output from the distribution unit A control signal processing unit for executing

  In the terminal device according to the present invention, a second optical receiving unit that receives the burst signal transmitted from the subscriber line terminating device, and each burst signal received by the second optical receiving unit, A second decoding unit that decodes each burst signal received by the two optical reception units, and a decoded signal multiplexing unit that multiplexes output signals of the decoding unit and the second decoding unit and outputs the multiplexed signals to the distribution unit, , May be further provided.

  Specifically, the terminal station reception method according to the present invention includes a plurality of optical reception units that accommodate one or more subscriber line termination devices, and controls uplink transmission timing of the subscriber line termination devices. And a reception method of a terminal device for transferring transmission data included in a burst signal transmitted from the subscriber line terminator to a higher-level communication network, wherein a plurality of optical receivers transmit from the subscriber line terminator. An optical receiving procedure for receiving the received burst signal, a plurality of decoding units provided for each of the optical receiving units, a decoding procedure for decoding the burst signal received by the optical receiving unit, and a plurality of provided for each of the optical receiving units. A distribution procedure in which a distribution unit separates the transmission data, information on the transmission data, and a control signal for controlling the subscriber line termination device, which are included in each burst signal decoded by the decoding unit; A data signal multiplexing unit provided in common to the plurality of optical receiving units, a data signal multiplexing procedure for multiplexing the transmission data output from the plurality of distributing units and transferring the multiplexed data to an upper communication network, and the plurality of optical receiving units A concentric uplink transmission timing control unit provided in common to each of the plurality of distribution units, based on information related to the transmission data, the subscriber line terminating device transmits an uplink signal timing to the optical reception unit Is assigned to each of the optical receivers such that the transmission time of the portion of the burst signal that is not transferred in a burst overlaps between the plurality of optical receivers, and a plurality of uplink transmissions provided for each of the optical receivers The subscriber line terminator in which the timing control unit accommodates the uplink transmission timing assigned from the concentric uplink transmission timing control unit in the optical receiving unit. And an uplink transmission timing control procedure assigned to each of the plurality of optical receiving units, and a control signal processing unit provided in common to the plurality of optical receiving units is accommodated in the plurality of optical receiving units based on the control signals output from the plurality of distributing units. And a control signal processing procedure for executing control on the subscriber line terminating device.

  Specifically, the terminal station reception method according to the present invention includes a plurality of optical reception units that accommodate one or more subscriber line termination devices, and controls uplink transmission timing of the subscriber line termination devices. And a reception method of a terminal device for transferring transmission data included in a burst signal transmitted from the subscriber line terminator to a higher-level communication network, wherein a plurality of optical receivers transmit from the subscriber line terminator. An optical receiving procedure for receiving the received burst signal, a plurality of decoding units provided for each of the optical receiving units, a decoding procedure for decoding the burst signal received by the optical receiving unit, and a plurality of provided for each of the optical receiving units. The distribution unit includes a distribution procedure that is included in each burst signal decoded by the decoding unit and separates into information related to the transmission data and the transmission data, and a data signal multiplexing common to the plurality of optical reception units However, a data signal multiplexing procedure for multiplexing the transmission data output from the plurality of distributing units and transferring the multiplexed data to an upper communication network, and an uplink transmission timing control unit provided in common to the plurality of optical receiving units, Based on the information related to the transmission data output from the distribution unit, the uplink signal timing at which the subscriber line termination device transmits a signal to the optical reception unit, the portion of the burst signal that is not transferred in a burst, And an uplink transmission timing control procedure that is assigned to each of the subscriber line terminating devices so that transmission times overlap between the plurality of optical receivers.

  The above inventions can be combined as much as possible.

  In the present invention, as the station apparatus accommodates more passive optical communication networks, the transmission / reception function units corresponding to the accommodated passive optical communication network increase, and the number of functions increases unnecessarily by the number of transmission / reception function units. Therefore, it is possible to solve the problem that a large number of buffers are required at the time of transmission to the higher-level communication network and the cost of the terminal equipment increases.

  Therefore, according to the present invention, in a terminal station device having a collective bandwidth allocation for all the subscriber line termination devices accommodated in a plurality of passive optical communication networks, a part of functional blocks of the terminal station device is divided into a plurality of passive optical devices. By sharing the communication network, the cost of the terminal device can be reduced.

An example of parity and B-OH included in a burst signal is shown. 1 shows an example of a configuration of a terminal station apparatus having a collective band allocation for all subscriber line termination apparatuses accommodated in a plurality of passive optical communication networks related to the present invention. It is an example of the B-OH multiple band allocation method relevant to this invention, (a) shows burst signal SAB # 1 input into the optical receiver 111 from the passive optical communication network # 1, (b) shows passive light. The burst signal SAB # m input from the communication network #m to the optical receiving unit 111 is shown, and (c) shows the data signal SD # n transferred from the multiplexing unit 121 to the upper communication network. It is an example of the FEC multiband | band allocation method relevant to this invention, (a) shows burst signal SAB # 1 input into the optical receiver 111 from the passive optical communication network # 1, (b) is a passive optical communication network The burst signal SAB # m input to the optical receiver 111 from #m is shown, and (c) shows the data signal SD # n transferred from the multiplexer 121 to the higher-level communication network. It is an example of the B-OH and FEC multiple band allocation method relevant to this invention, (a) shows the burst signal SAB # 1 input into the optical receiver 111 from the passive optical communication network # 1, (b) The burst signal SAB # m input from the passive optical communication network #m to the optical receiving unit 111 is shown, and (c) shows the data signal SD # n transferred from the multiplexing unit 121 to the higher-level communication network. An example of the terminal device which concerns on Embodiment 1 and 9 is shown. FIG. 2 is an example of a B-OH multiple band allocation method according to the first embodiment, where (a) shows a burst signal SAB # 1 input from the passive optical communication network # 1 to the optical receiver 111, and (b) shows passive light. The burst signal SAB # m1 input from the communication network # m1 to the optical reception unit 111 is shown, and (c) shows the data signal SD # n transferred from the multiplexing unit 121 to the higher-level communication network. 2 is an example of an FEC multiple band allocation method according to the first embodiment, where (a) shows a burst signal SAB # 1 input from the passive optical communication network # 1 to the optical receiving unit 111, and (b) shows a passive optical communication network. The burst signal SAB # m1 input from # m1 to the optical receiving unit 111 is shown, and (c) shows the data signal SD # n transferred from the multiplexing unit 121 to the upper communication network. It is an example of the B-OH and FEC multiple band allocation method which concerns on Embodiment 1, (a) shows burst signal SAB # 1 input into the optical receiver 111 from the passive optical communication network # 1, (b) The burst signal SAB # m1 input from the passive optical communication network # m1 to the optical reception unit 111 is shown, and (c) shows the data signal SD # n transferred from the multiplexing unit 121 to the higher-level communication network. An example of the terminal station apparatus which concerns on Embodiment 2 and 10 is shown. An example of the terminal device which concerns on Embodiment 3 and 11 is shown. An example of the terminal device which concerns on Embodiment 4 and 12 is shown. An example of the terminal station apparatus which concerns on Embodiment 5 and 13 is shown. An example of the terminal station apparatus which concerns on Embodiment 6 and 14 is shown. An example of the terminal device which concerns on Embodiment 7 and 15 is shown. An example of the terminal station apparatus which concerns on Embodiment 8 and 16 is shown.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. In addition, this invention is not limited to embodiment shown below. These embodiments are merely examples, and the present invention can be implemented in various modifications and improvements based on the knowledge of those skilled in the art. In the present specification and drawings, the same reference numerals denote the same components.

  In the invention according to the present embodiment, when the control signal SC from the plurality of transmission / reception function units 11 is processed by the concentrated uplink transmission timing control unit 125 of the terminal station device 91, the subscription function unit 11 to which the control signal SC belongs. By implementing the function of determining whether the signal is transmitted from the person line termination device 92, the functions of the control signal processing unit 113 and the uplink transmission timing control unit 115 in each transmission / reception function unit 11 are concentrated in the terminal device 91. To achieve a simpler structure. Further, the upstream transmission timing to the line concentrator 12 is a portion that is not transferred from the signal from each subscriber line termination device 92 to the upper communication network when the data transmission timing from each subscriber line termination device 92 is determined. By determining the data transmission timing of each subscriber line termination device 92 so as not to overlap, except for the signal rising part, disconnection data, synchronization bit, etc., the data transmission from the terminal station device 91 to the upper network is made efficient. And the data buffer in the multiplexing unit 121 is reduced.

(Embodiment 1)
The first embodiment will be described with reference to FIG. The terminal device 91 according to the present embodiment is an example in which the control signal processing unit 13 is shared by all passive optical communication networks. In FIG. 6, as an example, passive optical communication networks # 1, # m1, # m2, and # m3 are connected to the terminal device 91 via wirings 20-1, 20-m1, 20-m2, and 20-m3, respectively. An example is shown.

  Specifically, the terminal device 91 according to the present embodiment includes an optical reception unit 111, a decoding unit 112, and a distribution unit 114 for each passive optical communication network to which one or more subscriber line termination devices 92 are connected. And an uplink transmission timing control unit 115. The terminal device 91 includes multiplexing units 121, 122, and 123 that are shared by all passive optical communication networks, a concentric uplink transmission timing control unit 125, and a control signal processing unit 13. The multiplexing unit 121 functions as a data signal multiplexing unit, the multiplexing unit 122 functions as an MPCP Report signal multiplexing unit, and the multiplexing unit 123 functions as a control signal multiplexing unit.

  The reception method of the terminal device 91 according to the present embodiment is such that the terminal device 91 includes at least an optical reception procedure, a decoding procedure, a distribution procedure, a data signal multiplexing procedure, an uplink transmission timing control procedure, and a control signal processing procedure. One of the procedures is executed in order. A plurality of optical reception units 111 execute an optical reception procedure, a plurality of decoding units 112 execute a decoding procedure, a plurality of distribution units 114 execute a distribution procedure, a multiplexing unit 121 executes a data signal multiplexing procedure, Concentration uplink transmission timing control section 125 and uplink transmission timing control section 115 execute an uplink transmission timing control procedure, and control signal processing section 13 executes a control signal processing procedure.

  Each functional block will be described. The optical receiving unit 111 has a function of converting the burst signal SAB from the passive optical communication networks # 1 to # m3 into an electric signal and transferring it to the decoding unit 112. The decoding unit 112 decodes the encoded input signal SAB for each signal SAB received by the optical reception unit 111, removes the B-OH and the FEC parity from the decoded burst signal, and generates a signal SAA. It has a function of transferring the signal SAA to the distribution unit 114.

  The burst signal SAB includes a B-OH and a code word, and these are encoded signals. The code word includes a payload and parity. The signal SAA is obtained by extracting the payload included in the decoded burst signal. The payload includes a data signal SD, an MPCP Report signal RM, and other control signals SC.

  The distributing unit 114 separates the data signal SD, which is transmission data in the signal SAA, and transfers it to the multiplexing unit 121, and separates the MPCP Report signal RM in the signal SAA and sends it to the concentrated uplink transmission timing control unit 125. And a function of separating a non-data signal (hereinafter referred to as a control signal SC) other than the MPCP Report signal RM in the signal SAA and transferring it to the multiplexing unit 123.

  The data signal SD is transmission data of the subscriber line termination device 92. The MPCP Report signal RM is information relating to transmission data used when assigning the uplink transmission timing of the subscriber line terminating device 92. The control signal SC is a control signal for controlling the subscriber line termination device 92. As the control signal SC, a Register Request signal or an OAM (Operations, Administrations, and Maintenance) signal transmitted from the subscriber line terminating device 92 at the time of new registration of the subscriber line terminating device 92 is assumed, but other non-data signals are assumed. It doesn't matter.

  The uplink transmission timing control unit 115 has a function of transferring the MPCP Report signal RM to the multiplexing unit 122. As a result, the uplink transmission timing control unit 115 assigns the uplink transmission timing assigned from the concentrated line uplink transmission timing control unit 125 to the subscriber line termination device 92 accommodated in the optical reception unit 111.

  The multiplexing unit 121 temporarily buffers the signals SD received from a plurality of ports, and temporally multiplexes the signals SD stored in the buffers into data signals SD # n, which are connected via the wiring 20-n. And has a function of transferring to the upper communication network. The multiplexing unit 122 has a buffer function that temporarily holds signals RM received from a plurality of ports, and a function that temporally multiplexes the signals RM stored in the buffer and transfers the signals to the concentrated uplink transmission timing control unit 125. Have. The multiplexing unit 123 has a buffer function for temporarily holding the signals SC received from a plurality of ports, and a function for temporally multiplexing the signals SC stored in the buffers and transferring them to the control signal processing unit 13.

  Based on the signal RM, the concentric upstream transmission timing control unit 125 sets the upstream signal timing at which the subscriber line termination device 92 transmits a signal to the optical receiver 111, and the transmission time of the portion of the burst signal that is not transferred in a burst. Has a function of assigning to each of the optical receivers 111 so that the optical receivers 111 overlap each other. The allocation method in which the transmission times of the portions of the burst signal that are not transferred in the burst overlap between the plurality of optical receivers 111 is, for example, a B-OH multiple band allocation method to the passive optical communication networks # 1 to # m3, Alternatively, it is a band allocation method (hereinafter referred to as B-OH and FEC multiple band allocation method) in which the FEC multiple band allocation method or both are performed simultaneously. As a result, the concentric uplink transmission timing control unit 125 assigns an uplink transmission timing at which the subscriber line terminating apparatus 92 transmits a signal to the receiving optical receiver 111 for each optical receiver 111, and sets the uplink transmission timing to the uplink transmission timing. The transmission timing control unit 115 is notified. The control signal processing unit 13 has a function of processing the received control signal SC.

  A B-OH multiple band allocation method will be described with reference to FIG. The B-OH multiple band allocation method has a transmission permission amount allocation procedure and a transmission start time allocation procedure in order. Here, from the passive optical communication network # 1, as shown in FIG. 7A, the burst signal SAB # 1 including one codeword (codeword # 1-1) in the codeword portion is connected to the wiring 20-. 1 is transmitted. From the passive optical network # m1, as shown in FIG. 7B, a burst signal in which three code words (code words # m1-1, # m1-2, # m1-3) are included in the codeword part. SAB # m1 is transmitted via the wiring 20-m1. The optical receivers 111 # 1 and # m1 receive the burst signals SAB # 1 and SAB # m1, respectively.

  First, a transmission permission amount allocation procedure in the B-OH multiple band allocation method will be described. As an example of a transmission permission amount assignment procedure, a transmission permission amount is assigned to each passive optical communication network according to a ratio of the sum of the transmission request amounts from the subscriber line terminating devices 92 accommodated in the passive optical communication network. Although a method is mentioned, other methods may be used.

  Next, a transmission start time allocation procedure in the B-OH multiple band allocation method will be described. The concentric uplink transmission timing control unit 125 first calculates the total time Tb of the B-OH transmission time included in the burst signal SAB # m1. The total time Tb of B-OH transmission time is the sum of the time tbt at the burst rising portion and the time tbe at the burst end portion. Tb, tbt, and tbe correspond to portions of the burst signal that are not transferred in a burst. Subsequently, as shown in FIGS. 7A and 7B, the concentric uplink transmission timing control unit 125 includes the burst signal SAB # 1 to be transmitted first and the burst signal SAB # m1 to be transmitted next. The timing for transmitting the burst signal SAB # m1 is determined so as to overlap with the total time Tb at the maximum.

  The FEC multiple band allocation method will be described with reference to FIG. The FEC multi-band allocation method includes a transmission permission amount allocation procedure and a transmission start time allocation procedure in order. Here, from the passive optical communication network # 1, as shown in FIG. 8A, a burst signal SAB # 1 including one codeword (codeword # 1-1) in the codeword portion is connected to the wiring 20-. 1 is transmitted. From the passive optical communication network # m1, as shown in FIG. 8 (b), a burst signal including three code words (code words # m1-1, # m1-2, # m1-3) in the codeword portion. SAB # m1 is transmitted via the wiring 20-m1.

  First, a transmission permission amount allocation procedure in the FEC multiple band allocation method will be described. As an example of a transmission permission amount assignment procedure, a transmission permission amount is assigned to each passive optical communication network according to a ratio of the sum of the transmission request amounts from the subscriber line terminating devices 92 accommodated in the passive optical communication network. Although a method is mentioned, other methods may be used.

  Next, a transmission start time allocation procedure in the FEC multiple band allocation method will be described. The concentrated uplink transmission timing control unit 125 first calculates a total time Tf of transmission times of FEC parity (parity # m1-1, # m1-2, # m1-3) included in the burst signal SAB # m1. The burst signal SAB # m1 includes three FEC parities. For this reason, the total time Tf of the FEC parity transmission time is three times the FEC parity transmission time tf. Tf and tf correspond to a portion of the burst signal that is not transferred in a burst. Subsequently, as shown in FIGS. 8A and 8B, the concentric uplink transmission timing control unit 125 includes the burst signal SAB # 1 to be transmitted first and the burst signal SAB # m1 to be transmitted next. The timing for transmitting the burst signal SAB # m is determined so that it overlaps with time Tf at the maximum.

  The B-OH and FEC multiple band allocation method will be described with reference to FIG. The B-OH and FEC multi-band allocation method includes a transmission permission amount allocation procedure and a transmission start time allocation procedure in order. Here, from the passive optical communication network # 1, as shown in FIG. 9A, the burst signal SAB # 1 including one codeword (codeword # 1-1) in the codeword portion is connected to the wiring 20-. 1 is transmitted. From the passive optical communication network # m1, as shown in FIG. 9B, a burst signal including three code words (code words # m1-1, # m1-2, # m1-3) in the codeword portion. SAB # m1 is transmitted via the wiring 20-m1.

  First, a transmission permission amount allocation procedure in the B-OH and FEC multiple band allocation method will be described. As an example of a transmission permission amount assignment procedure, a transmission permission amount is assigned to each passive optical communication network according to a ratio of the sum of the transmission request amounts from the subscriber line terminating devices 92 accommodated in the passive optical communication network. Although a method is mentioned, other methods may be used.

  Next, a transmission start time allocation procedure in the B-OH and FEC multiple band allocation method will be described. The concentric uplink transmission timing control unit 125 firstly adds the total transmission time Tb of B-OH included in the burst signal SAB # m1 and the FEC parity (parity # m1-1, #) included in the burst signal SAB # m1. The total transmission time Tf of m1-2, # m1-3) is calculated. Subsequently, the sum of the total time Tb of the B-OH transmission time and the total time Tf of the FEC parity transmission time is obtained. The sum of Tb and Tf is a sum of three times the burst rise time tbt, burst end time tbe, and FEC parity transmission time tf. Tf, tbt, tbe, and tf correspond to portions of the burst signal that are not transferred in a burst. Subsequently, as shown in FIGS. 9A and 9B, the concentric upstream transmission timing control unit 125 determines that the burst signal SAB # 1 to be transmitted first and the burst signal SAB # m1 to be transmitted next are The timing for transmitting the burst signal SAB # m1 is determined so that the time (Tb + Tf) overlaps at the maximum.

  Note that when applying the B-OH multiband allocation method, the FEC multiband allocation method, and the B-OH and FEC multiband allocation method, data that is not transferred in a burst, such as a synchronization bit or disconnection data, is further added. If included, the burst signal may be overlapped within the range of the total time of the portion of the burst signal that is not transferred in the burst.

  Here, the B-OH multiple band in which the concentric uplink transmission timing control unit 125 assigns the transmission permission amount and the transmission start time to all the subscriber line termination devices 92 accommodated in the terminal station device 91 at once. Although the allocation method, the FEC multiband allocation method, and the B-OH and FEC multiband allocation method have been introduced, other methods are also conceivable. A band allocation method for superimposing the B-OH transmission time of the signal transmitted from the subscriber line termination device 92 belonging to different passive optical communication networks, the FEC parity transmission time, or the sum of the transmission times of both; If so, the configuration of the terminal device 91 is not limited to the above example. The same applies to other embodiments.

  Therefore, in the present embodiment, the concentric uplink transmission timing control unit 125 determines the subscriber line within the range of the total transmission time of the portions that are not transferred in the burst among the burst signals transmitted by all the subscriber line termination devices 92. The signal transmitted from the terminating device 92 to the optical receiver 111 is superimposed. Further, the concentric upstream transmission timing control unit 125 transmits a signal to the optical receiving unit 111 by the subscriber line terminating device 92 so that the time when the transmission data arrives at the multiplexing unit 121 does not overlap between the plurality of optical receiving units 111. The uplink transmission timing to be assigned is assigned to each optical receiver 111.

  For example, the concentric uplink transmission timing control unit 125 assigns a transmission permission amount and a transmission start time for each uplink transmission timing control unit 115 corresponding to the passive optical communication networks # 1 to #m, and based on this A bandwidth allocation method is also conceivable in which the uplink transmission timing control unit 115 allocates a transmission permission amount and a transmission start time to the subscriber line terminating device 92 accommodated in the uplink transmission timing control unit 115. This method can reduce the calculation load of the concentric uplink transmission timing control unit 125 as compared with the collective band allocation method.

  In order to further reduce the calculation load on the concentric uplink transmission timing control unit 125, the concentric uplink transmission timing control unit 125 performs the uplink transmission timing control unit 115 corresponding to the passive optical communication networks # 1 to #m. Then, only the transmission permission amount or only the transmission start time is allocated, and based on this, the uplink transmission timing control unit 115 transmits to the subscriber line termination device 92 accommodated in the uplink transmission timing control unit 115. A bandwidth allocation method for allocating the permitted amount and the transmission start time is also conceivable. However, when the concentric uplink transmission timing control unit 125 does not assign a transmission start time to each uplink transmission timing control unit 115, a large buffer is provided in the multiplexing unit 121 and the multiplexing unit 122 in order to correspond to a signal arriving at the same time. Is required. In addition, when the concentric uplink transmission timing control unit 125 does not assign the transmission permission amount to each uplink transmission timing control unit 115, a large amount of signals concentrate on the multiplexing unit 121 or the multiplexing units 122 and 123, and some signals May cause buffer overflow.

  Alternatively, a terminal device 91 that executes the band allocation method without providing the concentrated uplink transmission timing control unit 125 is also conceivable. In the terminal device 91, the MPCP Report signal RM is shared between the uplink transmission timing control units 115 corresponding to the passive optical communication networks # 1 to #m, and one or a plurality of uplink transmission timing control units 115 are shared. Executes the bandwidth allocation method, and notifies the other uplink transmission timing control section 115 of the transmission permission amount and the transmission start time, or only the transmission permission amount or only the transmission start time. In the case of this terminal station device 91, it is possible to reduce the concentrated uplink transmission timing control unit 125 among the functions of the terminal station device 91, and thus it is possible to reduce the cost.

  In the first embodiment, the terminal unit 91 is provided with the multiplexing unit 123 and the control signal processing unit 13 is aggregated, thereby reducing the functions required by the transmission / reception function unit 11 for each passive optical communication network. The cost can be reduced.

(Embodiment 2)
A second embodiment will be described with reference to FIG. The terminal station device 91 according to the present embodiment is an example in which the uplink transmission timing control unit 15 is shared by all passive optical communication networks. FIG. 10 shows an example in which passive optical communication networks # 1, # m1, # m2, and # m3 are connected to the terminal device 91 as an example.

  Specifically, the terminal device 91 includes an optical reception unit 111, a decoding unit 112, a distribution unit 114, and a control signal processing unit 113 for each passive optical communication network. The terminal device 91 includes multiplexing units 121 and 122 that are shared by all passive optical communication networks, and an uplink transmission timing control unit 15.

  The reception method of the terminal device 91 according to the present embodiment is such that the terminal device 91 includes at least an optical reception procedure, a decoding procedure, a distribution procedure, a data signal multiplexing procedure, an uplink transmission timing control procedure, and a control signal processing procedure. One of the procedures is executed in order. A plurality of optical reception units 111 execute an optical reception procedure, a plurality of decoding units 112 execute a decoding procedure, a plurality of distribution units 114 execute a distribution procedure, a multiplexing unit 121 executes a data signal multiplexing procedure, The uplink transmission timing control unit 15 executes the uplink transmission timing control procedure, and the plurality of control signal processing units 113 execute the control signal processing procedure.

  Each functional block will be described. The optical receiving unit 111 has a function of converting the burst signal SAB from the passive optical communication networks # 1 to # m3 into an electric signal and transferring the electric signal to the decoding unit 112. The decoding unit 112 has a function of decoding the encoded input signal SAB, removing the B-OH and FEC parity to obtain the signal SAA, and transferring the signal SAA to the distribution units 114 # 1 to # m3.

  The distributing unit 114 has a function of transferring the data signal SD in the signal SAA to the multiplexing unit 121, a function of transferring the MPCP Report signal RM in the signal SAA to the multiplexing unit 122, and other control signals SC in the signal SAA. And a function of transferring to the control signal processing unit 113. The control signal processing unit 113 has a function of processing the control signal SC.

  The multiplexing unit 121 temporarily buffers the signals SD received from a plurality of ports, and temporally multiplexes the signals SD stored in the buffers into data signals SD # n, which are connected via the wiring 20-n. And has a function of transferring to the upper communication network. The multiplexing unit 122 has a buffer function that temporarily holds signals RM received from a plurality of ports, and a function that temporally multiplexes the signals RM stored in the buffer and transfers the signals to the uplink transmission timing control unit 15. The uplink transmission timing control unit 15 has a function of performing a B-OH multiple band allocation method, an FEC multiple band allocation method, or a B-OH and FEC multiple band allocation method based on the received MPCP Report signal RM.

  In the second embodiment, the functions of the uplink transmission timing control unit 115 and the concentric uplink transmission timing control unit 125 of FIG. 2 in the terminal device 91 are aggregated in the common uplink transmission timing control unit 15, thereby enabling passive optical communication. Functions required for each network can be reduced, and the cost of the terminal device 91 can be reduced.

(Embodiment 3)
A third embodiment will be described with reference to FIG. The terminal device 91 according to the present embodiment is an example in which the uplink transmission timing control unit 15 and the control signal processing unit 13 are shared by all passive optical communication networks. This embodiment is different from the first embodiment in that not only the control signal processing unit 13 but also the uplink transmission timing control unit 15 is shared by all passive optical communication networks.

  Specifically, the terminal device 91 according to the present embodiment includes an optical reception unit 111, a decoding unit 112, and a distribution unit 114 for each passive optical communication network. In addition, the terminal device 91 includes multiplexing units 121, 122, and 123, an uplink transmission timing control unit 15, and a control signal processing unit 13 that are shared by all passive optical communication networks.

  The reception method of the terminal device 91 according to the present embodiment is such that the terminal device 91 includes at least an optical reception procedure, a decoding procedure, a distribution procedure, a data signal multiplexing procedure, an uplink transmission timing control procedure, and a control signal processing procedure. One of the procedures is executed in order. A plurality of optical reception units 111 execute an optical reception procedure, a plurality of decoding units 112 execute a decoding procedure, a plurality of distribution units 114 execute a distribution procedure, a multiplexing unit 121 executes a data signal multiplexing procedure, The uplink transmission timing control unit 15 executes the uplink transmission timing control procedure, and the control signal processing unit 13 executes the control signal processing procedure.

  Each functional block will be described. The optical receiving unit 111 has a function of converting the burst signal SAB from the passive optical communication networks # 1 to # m3 into an electric signal and transferring the electric signal to the decoding unit 112. The decoding unit 112 has a function of decoding the encoded burst signal SAB, removing the B-OH and the FEC parity to obtain a signal SAA, and transferring the signal SAA to the distribution unit 114. The distributing unit 114 has a function of transferring the data signal SD in the signal SAA to the multiplexing unit 121, a function of transferring the MPCP Report signal RM in the signal SAA to the multiplexing unit 122, and other control signals SC in the signal SAA. And a function of transferring to the multiplexing unit 123.

  The multiplexing unit 121 temporarily buffers the signals SD received from a plurality of ports, and temporally multiplexes the signals SD stored in the buffers into data signals SD # n, which are connected via the wiring 20-n. And has a function of transferring to the upper communication network. The multiplexing unit 122 has a buffer function that temporarily holds signals RM received from a plurality of ports, and a function that temporally multiplexes the signals RM stored in the buffer and transfers the signals to the uplink transmission timing control unit 15. The multiplexing unit 123 has a buffer function for temporarily holding the signals SC received from a plurality of ports, and a function for temporally multiplexing the signals SC stored in the buffers and transferring them to the control signal processing unit 13.

  The uplink transmission timing control unit 15 has a function of performing a B-OH multiple band allocation method, an FEC multiple band allocation method, or a B-OH and FEC multiple band allocation method based on the received MPCP Report signal RM. The control signal processing unit 13 has a function of processing the control signal SC.

  In Embodiment 3, the functions of the uplink transmission timing control unit 115 and the concentric uplink transmission timing control unit 125 of FIG. 2 are integrated into a common uplink transmission timing control unit 15, and a multiplexing unit 123 is provided to provide a control signal processing unit. By consolidating 113 into the control signal processing unit 13, functions required for each passive optical communication network are reduced, and the cost of the terminal device 91 is reduced.

  The third embodiment differs from the first embodiment in that not only the control signal processing unit 13 of the terminal device 91 but also the uplink transmission timing control unit 15 is shared by all passive optical communication networks. Therefore, Embodiment 3 can reduce the functions required for each passive optical communication network from Embodiment 1.

(Embodiment 4)
A fourth embodiment will be described with reference to FIG. The terminal device 91 according to the present embodiment is an example in which the uplink signal transmission timing control unit 15, the control signal processing unit 13, and the distribution unit 14 are shared by all passive optical communication networks. The fourth embodiment differs from the third embodiment in that not only the uplink transmission timing control unit 15 and the control signal processing unit 13 but also the distribution unit 14 is shared by all passive optical communication networks.

  The terminal device 91 according to the present embodiment includes an optical receiving unit 111 and a decoding unit 112 for each passive optical communication network. In addition, the terminal device 91 includes a multiplexing unit 16, a distribution unit 14, an uplink transmission timing control unit 15, and a control signal processing unit 13 that are shared by all passive optical communication networks. The multiplexing unit 16 functions as a decoded signal multiplexing unit.

  The reception method of the terminal device 91 according to the present embodiment is that the terminal device 91 includes an optical reception procedure, a decoding procedure, a decoded signal multiplexing procedure, a distribution procedure, an uplink transmission timing control procedure, and a control signal processing procedure. At least one of the procedures is sequentially executed. Multiple optical receivers 111 execute optical reception procedures, multiple decoders 112 execute decoding procedures, multiplexing unit 16 executes decoded signal multiplexing procedures, distribution unit 114 executes distribution procedures, and uplink transmission The timing control unit 15 executes the uplink transmission timing control procedure, and the control signal processing unit 13 executes the control signal processing procedure.

  Each functional block will be described. The optical receiving unit 111 has a function of converting the burst signal SAB from the passive optical communication networks # 1 to # m3 into an electric signal and transferring the electric signal to the decoding unit 112. The decoding unit 112 has a function of decoding the encoded input signal SAB, removing the B-OH and the FEC parity to obtain the signal SAA, and transferring the signal SAA to the multiplexing unit 16.

  The multiplexing unit 16 has a buffer function for temporarily holding the signals SAA received from a plurality of ports, and a function for temporally multiplexing the signals SAA stored in the buffers and transferring the signals to the distribution unit 14. The distributing unit 14 multiplexes the data signal SD in the input signal SAA to form the data signal SD # n, and transfers the data signal SD # n to the higher-level communication network via the wiring 20-n, and the upstream transmission timing control unit of the MPCP Report signal RM 15 and a function of transferring another control signal SC to the control signal processing unit 13.

  The uplink transmission timing control unit 15 has a function of performing a B-OH multiple band allocation method, an FEC multiple band allocation method, or a B-OH and FEC multiple band allocation method based on the received MPCP Report signal RM. The control signal processing unit 13 has a function of processing the received control signal SC.

  In the fourth embodiment, the multiplexing unit 16 is provided between the decoding unit 112 and the distribution unit 14, so that the uplink transmission timing control unit 15, the control signal processing unit 13, and the distribution unit 14 are shared by all passive optical communication networks. Thereby, in this embodiment, a function required for every passive optical communication network can be reduced, and the cost reduction of the terminal device 91 can be implement | achieved.

  The present embodiment is different from the third embodiment in that not only the uplink transmission timing control unit 15 and the control signal processing unit 13 but also the distribution unit 14 is shared by all passive optical communication networks. Therefore, this embodiment can reduce the function required for each passive optical communication network from the third embodiment.

(Embodiment 5)
The fifth embodiment will be described with reference to FIG. The terminal device 91 according to the present embodiment is an example in which the uplink transmission timing control unit 15 and the control signal processing unit 13 are shared by all passive optical communication networks, and the distribution unit 14 is shared by some passive optical communication networks. It is. The fifth embodiment is different from the fourth embodiment in that one distribution unit 14 does not accommodate all passive optical communication networks but only a part of the passive optical communication networks.

  Specifically, the terminal device 91 according to the present embodiment includes an optical receiving unit 111 and a decoding unit 112 for each passive optical communication network. In addition, the terminal device 91 includes multiplexing units 121, 122, and 123, an uplink transmission timing control unit 15, and a control signal processing unit 13 that are shared by all passive optical communication networks. The terminal device 91 according to the present embodiment includes a distribution unit 14 shared by the passive optical communication networks # 1 and # m1, and a distribution unit 114 provided for each of the passive optical communication networks # m2 to # m3. The optical receiving unit 111 provided for each of the passive optical communication networks # m2 to # m3 functions as a second optical receiving unit, and the decoding unit 112 provided for each of the passive optical communication networks # m2 to # m3 functions as a second decoding unit. The distribution unit 114 provided for each of the passive optical communication networks # m2 to # m3 functions as a second distribution unit.

  Here, like the distribution unit 14 of the terminal device 91 in FIG. 13, the distribution unit 14 that accommodates a plurality of passive optical communication networks is particularly referred to as a “multiple accommodation distribution unit”. Although the terminal device 91 of FIG. 13 shows the structure provided with the one distribution part 14 which functions as a several accommodation distribution part, and the distribution part 114 which accommodates the passive optical communication networks # m2 and # m3 one by one. You may be the structure of. For example, there may be two or more multiple distribution units 14, or all the distribution units may be the multiple distribution unit 14.

  The reception method of the terminal device 91 according to the present embodiment is such that the terminal device 91 has an optical reception procedure, a decoding procedure, a decoded signal multiplexing procedure, a distribution procedure, a data signal multiplexing procedure, an uplink transmission timing control procedure, At least one of the control signal processing procedures is sequentially executed. A plurality of optical reception units 111 execute an optical reception procedure, a plurality of decoding units 112 execute a decoding procedure, a multiplexing unit 16 executes a decoded signal multiplexing procedure, and distribution units 14 and 114 execute a distribution procedure, The multiplexing unit 121 executes the data signal multiplexing procedure, the uplink transmission timing control unit 15 executes the uplink transmission timing control procedure, and the control signal processing unit 13 executes the control signal processing procedure.

  Each functional block will be described. The optical receiving unit 111 has a function of converting the burst signal SAB from the passive optical communication networks # 1 to # m3 into an electric signal and transferring the electric signal to the decoding unit 112. The decoding units 112 of # 1 and # m1 have a function of decoding the encoded input signal SAB, removing the B-OH and the FEC parity to obtain the signal SAA, and transferring the signal SAA to the multiplexing unit 16. The decoding units 112 of # m2 and # m3 have a function of decoding the encoded input signal SAB, removing the B-OH and the FEC parity to obtain the signal SAA, and transferring the signal SAA to the distributing unit 114.

  The multiplexing unit 16 has a buffer function for temporarily holding the signals SAA received from a plurality of ports, and a function for temporally multiplexing the signals SAA stored in the buffers and transferring the signals to the distribution unit 14. The distributing units 14 and 114 transfer the data signal SD in the input signal SAA to the multiplexing unit 121, transfer the MPCP Report signal RM to the multiplexing unit 122, and transfer other control signals SC to the multiplexing unit 123. And a function to perform.

  The multiplexing unit 121 temporarily buffers the signals SD received from a plurality of ports, and temporally multiplexes the signals SD stored in the buffers into data signals SD # n, which are connected via the wiring 20-n. And has a function of transferring to the upper communication network. The multiplexing unit 122 has a buffer function that temporarily holds signals RM received from a plurality of ports, and a function that temporally multiplexes the signals RM stored in the buffer and transfers the signals to the uplink transmission timing control unit 15. The multiplexing unit 123 has a buffer function for temporarily holding the signals SC received from a plurality of ports, and a function for temporally multiplexing the signals SC stored in the buffers and transferring them to the control signal processing unit 13.

  The uplink transmission timing control unit 15 has a function of performing a B-OH multiple band allocation method, an FEC multiple band allocation method, or a B-OH and FEC multiple band allocation method based on the received MPCP Report signal RM. The control signal processing unit 13 has a function of processing the received control signal SC.

  In the fifth embodiment, the uplink transmission timing control unit 15 and the control signal processing unit 13 are shared by all passive optical communication networks by providing the multiplexing unit 16 between the decoding unit 112 and the distribution unit 14 of # 1 to # m1. In addition, the distribution unit 14 is shared by some passive optical communication networks. Thereby, Embodiment 5 reduces the function required for each passive optical communication network, and realizes cost reduction of the terminal device 91.

  The fifth embodiment is different from the fourth embodiment in that one distribution unit 14 does not accommodate all passive optical communication networks but only a part of the passive optical communication networks. Therefore, since the fifth embodiment includes more sorting units 14 and 114 than the fourth embodiment, the function of the sorting unit 14 can be simplified.

(Embodiment 6)
The sixth embodiment will be described with reference to FIG. The terminal device 91 according to the present embodiment is an example in which the uplink transmission timing control unit 15, the control signal processing unit 13, the distribution unit 14, and the decoding unit 17 are shared by all passive optical communication networks. The sixth embodiment differs from the fourth embodiment in that all passive optical communication networks share not only the uplink transmission timing control unit 15, the control signal processing unit 13, and the distribution unit 14, but also the decoding unit 17. is there.

  Specifically, the terminal device 91 according to the present embodiment includes an optical receiving unit 111 for each passive optical communication network. In addition, the terminal device 91 includes a multiplexing unit 18, a decoding unit 17, a distribution unit 14, an uplink transmission timing control unit 15, and a control signal processing unit 13 that are shared by all passive optical communication networks. The multiplexing unit 18 functions as a reception signal multiplexing unit.

  The reception method of the terminal station apparatus 91 according to the present embodiment is that the terminal station apparatus 91 has an optical reception procedure, a reception signal multiplexing procedure, a decoding procedure, a distribution procedure, a data signal multiplexing procedure, an uplink transmission timing control procedure, At least one of the control signal processing procedures is sequentially executed. A plurality of optical receivers 111 execute an optical reception procedure, a multiplexing unit 18 executes a received signal multiplexing procedure, a decoding unit 17 executes a decoding procedure, a distribution unit 14 executes a distribution procedure, and a distribution unit 14 The data signal multiplexing procedure is executed, the uplink transmission timing control unit 15 executes the uplink transmission timing control procedure, and the control signal processing unit 13 executes the control signal processing procedure.

  Each functional block will be described. The optical receiving unit 111 has a function of converting the burst signal SAB from the passive optical communication networks # 1 to # m3 into an electric signal and transferring it to the multiplexing unit 18. The multiplexing unit 18 has a buffer function that temporarily holds signals received from a plurality of ports, and a function that temporally multiplexes the signals SAB stored in the buffer and transfers them to the decoding unit 17. The decoding unit 17 has a function of decoding the encoded input signal SAB, removing the B-OH and the FEC parity to obtain the signal SAA, and transferring the signal SAA to the distributing unit 14.

  The distributing unit 14 multiplexes the data signal SD in the input signal SAA to form the data signal SD # n, and transfers the data signal SD # n to the higher-level communication network via the wiring 20-n, and the upstream transmission timing control unit of the MPCP Report signal RM 15 and a function of transferring another control signal SC to the control signal processing unit 13. The uplink transmission timing control unit 15 has a function of performing a B-OH multiple band allocation method, an FEC multiple band allocation method, or a B-OH and FEC multiple band allocation method based on the received MPCP Report signal RM. The control signal processing unit 13 has a function of processing the received control signal SC.

  In the sixth embodiment, the multiplexing unit 18 having a large buffer is provided between the optical receiving units 111 and the decoding unit 17 of # 1 to # m3, and the wiring 21 having a large transmission band between the multiplexing unit 18 and the decoding unit 17 is provided. By providing −1, the uplink transmission timing control unit 15, the control signal processing unit 13, the distribution unit 14, and the decoding unit 17 are shared by all passive optical communication networks. Thereby, Embodiment 6 reduces the function required for each passive optical communication network, and realizes cost reduction of the terminal device 91.

  The difference between the sixth embodiment and the fourth embodiment is that all passive optical communication networks share not only the uplink transmission timing control unit 15, the control signal processing unit 13, and the distribution unit 14, but also the decoding unit 17. Therefore, Embodiment 6 can reduce the functions required for each passive optical communication network from Embodiment 4. On the other hand, in the sixth embodiment, the multiplexing unit 18 that requires a larger buffer than the amount necessary for the multiplexing unit 16 of the fourth embodiment, and the wiring 21-1 having a large transmission band between the multiplexing unit 18 and the decoding unit 17, Is required. In the following, the reason why the multiplexing unit 18 of the sixth embodiment needs to have a larger buffer than the multiplexing unit 18 of the fourth embodiment, and at least the distribution unit 14 in the wiring 21-1 between the multiplexing unit 18 and the decoding unit 17. The reason why a transmission band larger than the wiring 21-2 between the upper communication networks is required will be described.

  First, the reason why the multiplexing unit 18 of the sixth embodiment needs to have a larger buffer than the multiplexing unit 16 of the fourth embodiment will be described. The B-OH multi-band allocation method, the FEC multi-band allocation method, or the B-OH and FEC multi-band allocation method uses the B-OH transmission time or FEC parity transmission time of burst signals transmitted from different passive optical communication networks. In other words, the bandwidth allocation method realizes improvement in bandwidth utilization efficiency when the terminal station device 91 transfers the transmission time sum to the host communication network by superimposing the transmission time sums of both. Therefore, a part of the signal SAB before decoding transferred from the optical receiving unit 111 of Embodiment 6 arrives at the multiplexing unit 18 at the same time. Therefore, in order to avoid signal loss due to collision, the multiplexing unit 18 needs to have an amount of a buffer that can temporarily hold at least the signal of the overlapped portion of B-OH and / or FEC parity.

  On the other hand, since the multiplexing unit 16 of the fourth embodiment multiplexes the signal SAA decoded by the decoding unit 112, the amount of signals received at the same time is smaller than that of the multiplexing unit 18 of the sixth embodiment. Therefore, the buffer amount required for the multiplexing unit 16 of the fourth embodiment is smaller than the buffer amount required for the multiplexing unit 18 of the sixth embodiment.

  Next, the reason why the wiring 21-1 between the multiplexing unit 18 and the decoding unit 17 needs to have a larger transmission band than at least the wiring 21-2 between the terminal device 91 and the higher-level communication network will be described. The wiring 21-1 transmits the signal SAB before decoding, while the wiring 21-2 transmits the data signal SAA after decoding. Accordingly, the wiring 21-1 needs a larger transmission band than the wiring 21-2 to the extent that it is necessary to transmit at least B-OH and FEC parity.

(Embodiment 7)
The seventh embodiment will be described with reference to FIG. The terminal device 91 according to the present embodiment shares the uplink transmission timing control unit 15, the control signal processing unit 13, and the distribution unit 14 with all the passive optical communication networks, and further, the decoding unit 17 with some passive optical communication networks. This is an example of sharing. The difference between the seventh embodiment and the sixth embodiment is that one decoding unit 17 does not accommodate all passive optical communication networks but only some passive optical communication networks.

  Specifically, the terminal device 91 according to the present embodiment includes an optical receiving unit 111 for each passive optical communication network. Further, the terminal device 91 includes a multiplexing unit 16, a distribution unit 14, an uplink transmission timing control unit 15, and a control signal processing unit 13 that are shared by all the passive communication networks # 1 to #m. Also, the terminal device 91 according to the present embodiment includes a multiplexing unit 18 and a decoding unit 17 shared by the passive optical communication networks # 1 and # m1, and a decoding unit 112 provided for each of the passive optical communication networks # m2 to # m3. . The optical receiving unit 111 provided for each of the passive optical communication networks # m2 to # m3 functions as a second optical receiving unit, and the decoding unit 112 provided for each of the passive optical communication networks # m2 to # m3 functions as a second decoding unit. To do.

  Here, like the decoding unit 17 of the terminal device 91 in FIG. 15, a decoding unit that accommodates a plurality of passive optical communication networks is particularly referred to as a “multiple accommodation decoding unit”. The terminal device 91 in FIG. 15 shows a configuration including one decoding unit 17 that functions as a plurality of accommodating decoding units and a decoding unit 112 that accommodates the passive optical communication networks # m2 and # m3 one by one. You may be the structure of. For example, there may be two or more multiple-accommodating decoding units 17, and all the decoding units 112 may be the multiple-accommodating decoding units 17.

  In the reception method of the terminal device 91 according to the present embodiment, the terminal device 91 includes an optical reception procedure, a reception signal multiplexing procedure, a decoding procedure, a decoded signal multiplexing procedure, a distribution procedure, a data signal multiplexing procedure, At least one of an uplink transmission timing control procedure and a control signal processing procedure is sequentially executed. A plurality of optical receivers 111 execute an optical reception procedure, a multiplexer 18 executes a received signal multiplexing procedure, decoding units 17 and 112 execute a decoding procedure, a multiplexing unit 16 executes a decoded signal multiplexing procedure, The distribution unit 14 executes the distribution procedure, the distribution unit 14 executes the data signal multiplexing procedure, the uplink transmission timing control unit 15 executes the uplink transmission timing control procedure, and the control signal processing unit 13 executes the control signal processing procedure To do.

  Each functional block will be described. The optical receivers 111 of # 1 to # m1 have a function of converting the burst signal SAB from the passive optical communication networks # 1 to # m1 into an electric signal and transferring it to the multiplexer 18. The optical receiving units 111 of # m2 and # m3 have a function of converting burst signals SAB from the passive optical communication networks # m2 and m3 into electric signals and transferring them to the decoding unit 112. The multiplexing unit 18 has a buffer function that temporarily holds signals SAB received from a plurality of ports, and a function that temporally multiplexes the signals SAB stored in the buffer and transfers the signals to the decoding unit 17.

  The decoding units 17 and 112 have a function of decoding the encoded input signal SAB, removing B-OH and FEC parity to obtain a signal SAA, and transferring the signal SAA to the multiplexing unit 16. The multiplexing unit 16 has a buffer function for temporarily holding the signals SAA received from a plurality of ports, and a function for temporally multiplexing the signals SAA stored in the buffers and transferring the signals to the distribution unit 14.

  The distribution unit 14 multiplexes the data signal SD in the input signal into the data signal SD # n and transfers the data signal SD # n to the higher-level communication network via the wiring 20-n, and the upstream transmission timing control unit 15 with the MPCP Report signal RM. And a function of transferring other control signals SC to the control signal processing unit 13. The uplink transmission timing control unit 15 has a function of performing a B-OH multiple band allocation method, an FEC multiple band allocation method, or a B-OH and FEC multiple band allocation method based on the received MPCP Report signal RM. The control signal processing unit 13 has a function of processing the received control signal SC.

  In the seventh embodiment, a multiplexing unit 18 is provided between the optical receiving unit 111 and the decoding unit 112, and a multiplexing unit 16 is provided between the decoding units 17 and 112 and the distribution unit 14, so that the uplink transmission timing control unit 15 The control signal processing unit 13 and the distribution unit 14 are shared by all passive optical communication networks, and the decoding unit 17 is shared by some passive optical communication networks. Thereby, Embodiment 7 reduces the function required for each passive optical communication network, and realizes cost reduction of the terminal device 91.

  The difference between the seventh embodiment and the sixth embodiment is that one decoding unit 17 does not accommodate all passive optical communication networks but only some passive optical communication networks. Therefore, the seventh embodiment has an effect of reducing the problem of the sixth embodiment. In other words, by reducing the number of signals to be multiplexed, the buffer amount necessary for the multiplexing unit 18 immediately before the multiple accommodating decoding unit 17 and the wiring 21-1 between the multiple accommodating decoding unit 17 and the multiplexing unit 18 immediately preceding it are reduced. A necessary transmission band can be reduced.

(Embodiment 8)
The eighth embodiment will be described with reference to FIG. The terminal device 91 according to the present embodiment shares the uplink transmission timing control unit 15 and the control signal processing unit 13 with all the passive optical communication networks, shares the distribution unit 14 with some passive optical communication networks, In this example, the decoding unit 17 is shared by some passive optical communication networks. The difference between the eighth embodiment and the seventh embodiment is that one distribution unit 14 does not accommodate all passive optical communication networks, but only some passive optical communication networks.

  Specifically, the terminal device 91 according to the present embodiment includes an optical receiving unit 111 for each passive optical communication network. In addition, the terminal device 91 includes a multiplexing unit 18 and a decoding unit 17 shared by the passive optical communication networks # 1 to # m1, a decoding unit 112 used in the passive optical communication network # m2, and the passive optical communication networks # 1 to ##. A multiplexing unit 16 and a distribution unit 14 shared by m2 and a decoding unit 112 and a distribution unit 114 used in the passive optical communication network # m3 are provided. The terminal device 91 includes multiplexing units 121, 122, and 123 that are shared by all passive optical communication networks, an uplink transmission timing control unit 15, and a control signal processing unit 13.

  Here, like the decoding unit 17 of the terminal device 91 in FIG. 16, the decoding unit 17 that accommodates a plurality of passive optical communication networks is particularly referred to as a “multiple accommodation decoding unit”. The terminal device 91 in FIG. 16 shows a configuration including one decoding unit 17 that functions as a plurality of accommodating decoding units and a decoding unit 112 that accommodates the passive optical communication networks # m2 and # m3 one by one. You may be the structure of. For example, two or more multi-accommodating decoding units 17 may exist, or all the decoding units may be the multi-accommodating decoding unit 17.

  In addition, like the distribution unit 14 of the terminal device 91 of FIG. 16, the distribution unit 14 that accommodates a plurality of passive optical communication networks is particularly referred to as a “multiple accommodation distribution unit”. The terminal device 91 in FIG. 16 shows a configuration including one distribution unit 14 that functions as a plurality of storage distribution units and a distribution unit 114 that stores the passive optical communication network # m3 one by one. It does not matter. For example, there may be two or more multiple distribution units 14, or all the distribution units may be the multiple distribution unit 14.

  In the reception method of the terminal device 91 according to the present embodiment, the terminal device 91 includes an optical reception procedure, a reception signal multiplexing procedure, a decoding procedure, a decoded signal multiplexing procedure, a distribution procedure, a data signal multiplexing procedure, At least one of an uplink transmission timing control procedure and a control signal processing procedure is sequentially executed. A plurality of optical receivers 111 execute an optical reception procedure, a multiplexer 18 executes a received signal multiplexing procedure, decoding units 17 and 112 execute a decoding procedure, a multiplexing unit 16 executes a decoded signal multiplexing procedure, The distribution units 14 and 114 execute the distribution procedure, the multiplexing unit 121 executes the data signal multiplexing procedure, the uplink transmission timing control unit 15 executes the uplink transmission timing control procedure, and the control signal processing unit 13 controls the control signal processing procedure. Execute.

  Each functional block will be described. The optical receivers 111 of # 1 to # m1 have a function of converting the burst signal SAB from the passive optical communication networks # 1 to # m1 into an electric signal and transferring it to the multiplexer 18. The optical receiving units 111 of # m2 to # m3 have a function of converting burst signals SAB from the passive optical communication networks # m2 and # m3 into electric signals and transferring them to the decoding unit 112. The multiplexing unit 18 has a buffer function that temporarily holds signals SAB received from a plurality of ports, and a function that temporally multiplexes the signals SAB stored in the buffer and transfers the signals to the decoding unit 17. The decoding units 17 and 112 of # 1 to # m2 have a function of decoding the encoded input signal SAB, removing the B-OH and FEC parity to obtain the signal SAA, and transferring the signal SAA to the multiplexing unit 16 . The # m3 decoding unit 112 has a function of decoding the encoded input signal SAB, removing the B-OH and the FEC parity to obtain the signal SAA, and transferring the signal SAA to the distribution unit 114.

  The multiplexing unit 16 has a buffer function for temporarily holding the signals SAA received from a plurality of ports, and a function for temporally multiplexing the signals SAA stored in the buffers and transferring the signals to the distribution unit 14. The distributing units 14 and 114 transfer the data signal SD in the input signal SAA to the multiplexing unit 121, transfer the MPCP Report signal RM to the multiplexing unit 122, and transfer other control signals SC to the multiplexing unit 123. And a function to perform.

  The multiplexing unit 121 temporarily buffers the signals SD received from a plurality of ports, and temporally multiplexes the signals SD stored in the buffers into data signals SD # n, which are connected via the wiring 20-n. And has a function of transferring to the upper communication network. The multiplexing unit 122 has a buffer function that temporarily holds signals RM received from a plurality of ports, and a function that temporally multiplexes the signals RM stored in the buffer and transfers the signals to the uplink transmission timing control unit 15. The multiplexing unit 123 has a buffer function for temporarily holding the signals SC received from a plurality of ports, and a function for temporally multiplexing the signals SC stored in the buffers and transferring them to the control signal processing unit 13.

  The uplink transmission timing control unit 15 has a function of performing a B-OH multiple band allocation method, an FEC multiple band allocation method, or a B-OH and FEC multiple band allocation method based on the received MPCP Report signal RM. The control signal processing unit 13 has a function of processing the received control signal SC.

  In the eighth embodiment, a multiplexing unit 18 is provided between the optical receiving unit 111 and the decoding unit 17, and a multiplexing unit 16 is provided between the decoding units 17 and 112 and the distribution unit 14, so that the uplink transmission timing control unit 15 The control signal processing unit 13 is shared by all passive optical communication networks, the decoding unit 17 is shared by some passive optical communication networks, and the distribution unit 14 is shared by some passive optical communication networks. Thereby, Embodiment 8 reduces the function required for each passive optical communication network, and realizes cost reduction of the terminal device 91.

  The difference between the eighth embodiment and the seventh embodiment is that one distribution unit 14 does not accommodate all passive optical communication networks, but only some passive optical communication networks. Therefore, since the eighth embodiment includes more sorting units 14 and 114 than the seventh embodiment, the functions of the sorting units 14 and 114 can be simplified.

(Embodiment 9)
Embodiment 9 of the present invention will be described with reference to FIG. The terminal device 91 in FIG. 6 is an example in which the control signal processing unit 13 is shared by all passive optical communication networks. The difference between the ninth embodiment and the first embodiment is not only the B-OH multiband allocation method, the FEC multiband allocation method, or the B-OH and FEC multiband allocation method, but also the MPCP Message Overwrapping (NPL 2). Hereinafter, the MPCP multiple band allocation method is also executed.

  Specifically, the terminal device 91 according to the present embodiment includes an optical reception unit 111, a decoding unit 112, a distribution unit 114, and an uplink transmission timing control unit 115 for each passive optical communication network. In addition, the terminal device 91 includes multiplexing units 121, 122, and 123 that are shared by all passive optical communication networks, a concentrated uplink transmission timing control unit 125, and a control signal processing unit 13.

  Each functional block will be described. The optical receiving unit 111 has a function of converting the burst signal SAB from the passive optical communication networks # 1 to # m3 into an electric signal and transferring the electric signal to the decoding unit 112. The decoding unit 112 has a function of decoding the encoded input signal SAB, removing the B-OH and the FEC parity to obtain the signal SAA, and transferring the signal SAA to the distribution unit 114.

  The distributing unit 114 has a function of transferring the data signal SD in the input signal SAA to the multiplexing unit 121, a function of transferring the MPCP Report signal RM to the uplink transmission timing control unit 115, and a function of transferring the control signal to the multiplexing unit 123. And having. As the control signal SC, a Register Request signal and an OAM signal transmitted from the subscriber line termination device 92 at the time of new registration of the subscriber line termination device 92 are assumed, but other non-data signals may be used.

  The uplink transmission timing control unit 115 has a function of transferring the MPCP Report signal RM to the multiplexing unit 122. The multiplexing unit 121 temporarily buffers the signals SD received from a plurality of ports, and temporally multiplexes the signals SD stored in the buffers into data signals SD # n, which are connected via the wiring 20-n. And has a function of transferring to the upper communication network. The multiplexing unit 122 has a buffer function that temporarily holds signals RM received from a plurality of ports, and a function that temporally multiplexes the signals RM stored in the buffer and transfers the signals to the concentrated uplink transmission timing control unit 125. Have. The multiplexing unit 123 has a buffer function for temporarily holding the signals SC received from a plurality of ports, and a function for temporally multiplexing the signals SC stored in the buffers and transferring them to the control signal processing unit 13.

  The concentric upstream transmission timing control unit 125 uses a cooperative B-OH multiple bandwidth allocation method, a cooperative FEC multiple bandwidth allocation method, or a cooperative B-band to the passive optical communication networks # 1 to # m3. A function for executing the OH and FEC multi-band allocation method and a function for executing the MPCP multi-band allocation method for the passive optical communication networks # 1 to # m3. The control signal processing unit 13 has a function of processing the received control signal SC.

  The MPCP multi-band allocation method utilizes the fact that a non-data signal is a message that is necessary only between the terminal station device 91 and the subscriber line terminator 92, and terminates the subscriber line connected under different passive optical communication networks. This is a band allocation method that realizes improvement in band utilization efficiency when transferring data signals and non-data signals from the terminal station apparatus 91 to the higher-level communication network by causing the apparatus 92 to transmit data signals and non-data signals at the same time.

  The MPCP multiple band allocation method periodically includes a passive optical communication network classification method, a band allocation method for a passive optical communication network that transmits a data signal, and a band allocation method for a passive optical communication network that transmits a non-data signal. repeat.

  First, the passive optical communication network classification method will be described. In the passive optical communication network classification method, based on the received MPCP Report signal RM, the passive optical communication networks # 1 to # m3 are classified into a group that transmits a data signal and a group that transmits a non-data signal. As a passive optical communication network classification method, the passive optical communication networks # 1 to # m3 are alternately assigned to each group in descending order of the number of subscriber line termination devices 92 to be accommodated, so that the passive optical communication networks of the respective groups are arranged. A method of making the total number of subscriber line termination devices 92 belonging to the same as possible is conceivable, but other methods may be used.

  Next, a band allocation method for a passive optical communication network that transmits a data signal will be described. In the band allocation method for the passive optical communication network that transmits data signals, band allocation is performed for all subscriber line termination devices 92 belonging to the passive optical communication network that transmits data signals. As an example of bandwidth allocation to the passive optical communication network, the transmission permission amount is determined according to the ratio of the total transmission request amounts from all the subscriber line termination devices 92 accommodated in the passive optical communication network, and each subscriber line Although there is a method of assigning a transmission start time and a transmission duration so that signals from each subscriber line termination device 92 do not collide based on the transmission delay and the transmission permission amount of the termination device 92, there are other methods. It doesn't matter.

  Finally, a bandwidth allocation method for a passive optical communication network that transmits non-data signals will be described. In the bandwidth allocation method for the passive optical communication network that transmits non-data signals, bandwidth allocation is performed for all subscriber line termination devices 92 belonging to the passive optical communication network that transmits non-data signals. As an example of bandwidth allocation to the passive optical communication network, the transmission permission amount is determined according to the ratio of the total transmission request amounts from all the subscriber line termination devices 92 accommodated in the passive optical communication network, and each subscriber line Although there is a method of assigning a transmission start time and a transmission duration so that signals from each subscriber line termination device 92 do not collide based on the transmission delay and transmission permission amount of the termination device 92, other methods are available. It doesn't matter.

  Here, the concentric uplink transmission timing control unit 125 assigns the transmission permission amount and the transmission start time to all the subscriber line termination devices 92 accommodated in the terminal station device 91 in an MPCP multiple band allocation method. However, other methods are also conceivable. As long as a band allocation method for transmitting the data signal and the non-data signal to the subscriber line termination device 92 connected under different passive optical communication networks at the same time, the configuration of the terminal device 91 is the above example. It is not limited to. The same applies to other embodiments.

  For example, the concentric uplink transmission timing control unit 125 assigns a signal type (data signal or non-data signal), transmission permission amount, and transmission start time for each uplink transmission timing control unit 115, based on this. In addition, an MPCP multi-band allocation method in which the uplink transmission timing control unit 115 allocates a transmission permission amount and a transmission start time to the subscriber line terminating device 92 accommodated in the uplink transmission timing control unit 115 is also conceivable. . This method can reduce the calculation load of the concentric uplink transmission timing control unit 125 as compared to the collective MPCP multiple band allocation method.

  In order to further reduce the calculation load on the concentric uplink transmission timing control unit 125, the concentric uplink transmission timing control unit 125 sends a signal type (data signal or non-data signal) to each uplink transmission timing control unit 115. ) And only the permitted transmission amount, or only the signal type (data signal or non-data signal) and only the transmission start time, or only the signal type (data signal or non-data signal). An MPCP multi-band allocation method is also conceivable in which the uplink transmission timing control unit 115 allocates a transmission permission amount and a transmission start time to the subscriber line terminating device 92 accommodated in the uplink transmission timing control unit 115. However, when the concentric uplink transmission timing control unit 125 does not assign a transmission start time to each uplink transmission timing control unit 115, a large buffer is provided in the multiplexing unit 121 and the multiplexing unit 122 in order to correspond to a signal arriving at the same time. Is required. Further, when the concentric uplink transmission timing control unit 125 does not assign a transmission permission amount to each uplink transmission timing control unit 115, a large amount of signals are concentrated in the multiplexing unit 121 or the multiplexing unit 122, and some signals are buffered. There is a possibility of overflowing.

  Alternatively, a terminal device 91 that executes the MPCP multiple band allocation method without providing the concentric uplink transmission timing control unit 125 is also conceivable. In this terminal device 91, the MPCP Report information is shared between the uplink transmission timing control sections 115, and one or a plurality of uplink transmission timing control sections 115 execute the MPCP multiple band allocation method, and other uplink transmission timings. For the control unit 115, the type of signal to be transmitted (data signal or non-data signal) and transmission permission amount and transmission start time, or the type of signal to be transmitted (data signal or non-data signal) and transmission permission amount, or Only the type of signal to be transmitted (data signal or non-data signal) and the transmission start time, or the type of signal to be transmitted (data signal or non-data signal) are notified. In the case of this terminal station 91, the cost reduction can be realized by reducing the concentrated uplink transmission timing control unit 125 which is a function of the terminal station 91.

  In the ninth embodiment, the multiplexing unit 123 is provided and the control signal processing unit 13 is aggregated, so that the functions required for each passive optical communication network are reduced and the cost of the terminal device 91 is reduced. The ninth embodiment is different from the first embodiment in that not only the B-OH multiband allocation method, the FEC multiband allocation method, the B-OH and FEC multiband allocation method, but also the MPCP multiband allocation method is executed. It is. Therefore, the ninth embodiment can improve the band use efficiency when transferred from the terminal station device 91 to the higher-level communication network 20-n than the first embodiment.

(Embodiment 10)
The tenth embodiment will be described with reference to FIG. The terminal station device 91 according to the present embodiment is an example in which the uplink transmission timing control unit 15 is shared by all passive optical communication networks. The tenth embodiment differs from the second embodiment in that not only the B-OH multiband allocation method, the FEC multiband allocation method, the B-OH and FEC multiband allocation method, but also the MPCP multiband allocation method is executed. It is.

  Specifically, the terminal device 91 according to the present embodiment includes an optical reception unit 111, a decoding unit 112, a distribution unit 114, and a control signal processing unit 113 for each passive optical communication network. The terminal device 91 includes multiplexing units 121 and 122 that are shared by all passive optical communication networks, and an uplink transmission timing control unit 15.

  Each functional block will be described. The optical receiving unit 111 has a function of converting the burst signal SAB from the passive optical communication networks # 1 to # m3 into an electric signal and transferring the electric signal to the decoding unit 112. The decoding unit 112 has a function of decoding the encoded input signal SAB, removing the B-OH and the FEC parity to obtain the signal SAA, and transferring the signal SAA to the distribution unit 114. The distributing unit 114 transfers the data signal SD in the input signal SAA to the multiplexing unit 121, transfers the MPCP Report signal RM to the multiplexing unit 122, and transfers other control signals SC to the control signal processing unit 113. And a function to perform. The control signal processing unit 113 has a function of processing the control signal SC.

  The multiplexing unit 121 temporarily stores signals received from a plurality of ports, and temporally multiplexes the signals stored in the buffers into a data signal SD # n, which is connected to the host via the wiring 20-n. It has a function to transfer to the communication network. The multiplexing unit 122 has a buffer function that temporarily holds signals received from a plurality of ports, and a function that temporally multiplexes the signals stored in the buffer and transfers the signals to the uplink transmission timing control unit. Based on the received MPCP Report signal RM, the uplink transmission timing control unit 15 assigns the B-OH multiple band allocation method, the FEC multiple band allocation method, the B-OH and FEC multiple band allocation method, and the MPCP multiple band allocation. And a function of performing the method.

  In the tenth embodiment, the functions of the uplink transmission timing control unit 115 and the concentrated uplink transmission timing control unit 125 in FIG. 2 are aggregated in the uplink transmission timing control unit 125 in FIG. The function is reduced and the cost of the terminal device 91 is reduced.

  The tenth embodiment differs from the second embodiment in that not only the B-OH multiband allocation method, the FEC multiband allocation method, the B-OH and FEC multiband allocation method, but also the MPCP multiband allocation method is executed. It is. Therefore, the tenth embodiment can improve the bandwidth utilization efficiency when transferred from the terminal station device 91 to the higher-level communication network than the second embodiment.

(Embodiment 11)
The eleventh embodiment will be described with reference to FIG. The terminal device 91 according to the present embodiment is an example in which the uplink transmission timing control unit 15 and the control signal processing unit 13 are shared by all passive optical communication networks. The difference between the eleventh embodiment and the ninth embodiment is that not only the control signal processing unit 13 but also the uplink transmission timing control unit 15 is shared by all passive optical communication networks.

  Specifically, the terminal device 91 according to the present embodiment includes an optical reception unit 111, a decoding unit 112, a distribution unit 114, multiplexing units 121, 122, and 123 for each passive optical communication network, and uplink transmission timing. A control unit 15 and a control signal processing unit 13 are provided.

  Each functional block will be described. The optical receiving unit 111 has a function of converting the burst signal SAB from the passive optical communication networks # 1 to # m3 into an electric signal and transferring the electric signal to the decoding unit 112. The decoding unit 112 has a function of decoding the encoded input signal SAB, removing the B-OH and the FEC parity to obtain the signal SAA, and transferring the signal SAA to the distribution unit 114. The distributing unit 114 has a function of transferring the data signal SD in the input signal SAA to the multiplexing unit 121, a function of transferring the MPCP Report signal RM to the multiplexing unit 122, and a function of transferring other control signals to the multiplexing unit 123. Have.

  The multiplexing unit 121 temporarily buffers the signals SD received from a plurality of ports, and temporally multiplexes the signals SD stored in the buffers into a data signal SD # n, which is transferred to the higher-level communication network. It has a function. The multiplexing unit 122 has a buffer function that temporarily holds signals RM received from a plurality of ports, and a function that temporally multiplexes the signals RM stored in the buffer and transfers the signals to the uplink transmission timing control unit 15. The multiplexing unit 123 has a buffer function for temporarily holding the signals SC received from a plurality of ports, and a function for temporally multiplexing the signals SC stored in the buffers and transferring them to the control signal processing unit 13.

  Based on the received MPCP Report signal RM, the uplink transmission timing control unit 15 assigns the B-OH multiple band allocation method, the FEC multiple band allocation method, the B-OH and FEC multiple band allocation method, and the MPCP multiple band allocation. And a function of performing the method. The control signal processing unit 13 has a function of processing the control signal SC.

  In the eleventh embodiment, the functions of the uplink transmission timing control unit 115 and the concentric uplink transmission timing control unit 125 in FIG. 2 are integrated into the uplink transmission timing control unit 15 in FIG. 11, and a multiplexing unit 123 is further provided to control signal processing. By consolidating the unit 13, functions required for each passive optical communication network are reduced, and the cost of the terminal device 91 is reduced. The difference between the eleventh embodiment and the ninth embodiment is that not only the control signal processing unit 13 but also the uplink transmission timing control unit 15 is shared by all passive optical communication networks. Therefore, the eleventh embodiment can reduce the functions required for each passive optical communication network from the ninth embodiment.

Embodiment 12
A twelfth embodiment will be described with reference to FIG. The terminal device 91 according to the present embodiment is an example in which the uplink signal transmission timing control unit 15, the control signal processing unit 13, and the distribution unit 14 are shared by all passive optical communication networks. The difference between the twelfth embodiment and the eleventh embodiment is that not only the uplink transmission timing control unit 15 and the control signal processing unit 13 but also the distribution unit 14 is shared by all passive optical communication networks.

  Specifically, the terminal device 91 according to the present embodiment includes an optical receiving unit 111 and a decoding unit 112 for each passive optical communication network. In addition, the terminal device 91 includes a multiplexing unit 16, a distribution unit 14, an uplink transmission timing control unit 15, and a control signal processing unit 13 that are shared by all passive optical communication networks.

  Each functional block will be described. The optical receiving unit 111 has a function of converting the burst signal SAB from the passive optical communication networks # 1 to # m3 into an electric signal and transferring the electric signal to the decoding unit 112. The decoding unit 112 has a function of decoding the encoded input signal SAB, removing the B-OH and the FEC parity to obtain the signal SAA, and transferring the signal SAA to the multiplexing unit 16. The multiplexing unit 16 has a buffer function for temporarily holding the signals SAA received from a plurality of ports, and a function for temporally multiplexing the signals SAA stored in the buffers and transferring the signals to the distribution unit 14.

  The distribution unit 14 multiplexes the data signal SD in the input signal SAA into a data signal SD # n and transfers the data signal SD # n to the upper communication network, and a function to transfer the MPCP Report signal RM to the upstream transmission timing control unit 15; A function of transferring other control signals SC to the control signal processing unit 13. Based on the received MPCP Report signal RM, the uplink transmission timing control unit 15 assigns the B-OH multiple band allocation method, the FEC multiple band allocation method, the B-OH and FEC multiple band allocation method, and the MPCP multiple band allocation. And how to do. The control signal processing unit 13 has a function of processing the received control signal SC.

  In the twelfth embodiment, by providing a multiplexing unit 16 having a large buffer between the decoding unit 112 and the distribution unit 14, the uplink transmission timing control unit 15, the control signal processing unit 13, and the distribution unit 14 are connected to all passive optical communication networks. Share on Accordingly, the twelfth embodiment reduces the functions required for each passive optical communication network and realizes cost reduction of the terminal device 91.

  The difference between the twelfth embodiment and the eleventh embodiment is that not only the uplink transmission timing control unit 15 and the control signal processing unit 13 but also the distribution unit 14 is shared by all passive optical communication networks. Therefore, the twelfth embodiment can reduce the functions required for each passive optical communication network from the eleventh embodiment. On the other hand, the twelfth embodiment requires the multiplexing unit 16 having a large buffer and the wiring 21-3 having a large transmission band between the multiplexing unit 16 and the distribution unit 14, which are unnecessary in the eleventh embodiment. Become. Hereinafter, the reason why the multiplexing unit 16 needs to have a large buffer, and the bandwidth of the wiring 21-3 between the multiplexing unit 16 and the distribution unit 14 is at least larger than the wiring 21-4 between the distribution unit 14 and the upper communication network. The reason why is necessary is explained.

  First, the reason why the multiplexing unit 16 has a large buffer function will be described. In the MPCP multiband allocation method, a data signal and a non-data signal are transmitted at the same time to a subscriber line terminating device 92 connected under different passive optical communication networks, and transferred from the terminal station device 91 to the higher-level communication network. This is a bandwidth allocation method that realizes an improvement in bandwidth utilization efficiency. Therefore, part of the data signal and the non-data signal transferred from the decoding unit 112 according to the twelfth embodiment arrives at the multiplexing unit 16 at the same time. Therefore, the multiplexing unit 16 needs to have a large buffer for temporarily holding signals received from a plurality of ports and adjusting output timing in order to avoid signal loss due to collision.

  Next, the reason why the wiring 21-3 between the multiplexing unit 16 and the distribution unit 14 needs to have a larger band than at least the wiring 21-4 between the terminal device 91 and the higher-level communication network will be described. The distribution unit 14 extracts only the data signal SD from the mixed signal SAA of the data signal and the non-data signal received from the wiring 21-3, and transfers the data signal SD # n as the data signal SD # n to the upper communication network through the wiring 21-4. Therefore, the wiring 21-3 needs a larger transmission band than the wiring 21-4 to the extent that it is necessary to transmit the non-data signal.

(Embodiment 13)
The thirteenth embodiment will be described with reference to FIG. The terminal device 91 according to the present embodiment is an example in which the uplink transmission timing control unit 15 and the control signal processing unit 13 are shared by all passive optical communication networks, and the distribution unit 14 is shared by some passive optical communication networks. It is. The difference between the thirteenth embodiment and the twelfth embodiment is that one distribution unit 14 does not accommodate all passive optical communication networks, but only some passive optical communication networks.

  Specifically, the terminal device 91 according to the present embodiment includes an optical receiving unit 111 and a decoding unit 112 for each passive optical communication network. Also, the terminal device 91 includes a distribution unit 14 shared by the passive optical communication networks # 1 to # m1, and a distribution unit 114 provided in each of the passive optical communication networks # m2 and # m3. In addition, the terminal device 91 includes multiplexing units 121, 122, and 123, an uplink transmission timing control unit 15, and a control signal processing unit 13 that are shared by all passive optical communication networks.

  Here, like the distribution unit 14 of the terminal device 91 in FIG. 13, the distribution unit 14 that accommodates a plurality of passive optical communication networks is particularly referred to as a “multiple accommodation distribution unit”. Although the terminal device 91 of FIG. 13 shows the structure provided with the one distribution part 14 which functions as a several accommodation distribution part, and the distribution part 114 which accommodates the passive optical communication networks # m2 and # m3 one by one. You may be the structure of. For example, there may be two or more multiple distribution units 14, or all the distribution units may be the multiple distribution unit 14.

  Each functional block will be described. The optical receiving unit 111 has a function of converting the burst signal SAB from the passive optical communication networks # 1 to # m3 into an electric signal and transferring the electric signal to the decoding unit 112. The decoding units 112 of # 1 and # m1 have a function of decoding the encoded input signal SAB, removing the B-OH and the FEC parity to obtain the signal SAA, and transferring the signal SAA to the multiplexing unit 16. The decoding units 112 of # m2 and # m3 have a function of decoding the encoded input signal SAB, removing the B-OH and the FEC parity to obtain the signal SAA, and transferring the signal SAA to the distributing unit 114.

  The multiplexing unit 16 has a buffer function for temporarily holding the signals SAA received from a plurality of ports, and a function for temporally multiplexing the signals SAA stored in the buffers and transferring the signals to the distribution unit 14. The distributing units 14 and 114 transfer the data signal SD in the input signal SAA to the multiplexing unit 121, transfer the MPCP Report signal RM to the multiplexing unit 122, and transfer other control signals SC to the multiplexing unit 123. And a function to perform.

  The multiplexing unit 121 temporarily stores the signals SD received from a plurality of ports, and temporally multiplexes the signals SD stored in the buffers into the data signal SD # n, and the higher-level communication network 20-n It has the function to transfer to. The multiplexing unit 122 has a buffer function that temporarily holds signals RM received from a plurality of ports, and a function that temporally multiplexes the signals RM stored in the buffer and transfers the signals to the uplink transmission timing control unit 15. The multiplexing unit 123 has a buffer function for temporarily holding the signals SC received from a plurality of ports, and a function for temporally multiplexing the signals SC stored in the buffers and transferring them to the control signal processing unit 13.

  Based on the received MPCP Report signal RM, the uplink transmission timing control unit 15 assigns the B-OH multiple band allocation method, the FEC multiple band allocation method, the B-OH and FEC multiple band allocation method, and the MPCP multiple band allocation. And a function of performing the method. The control signal processing unit 13 has a function of processing the received control signal SC.

  In the thirteenth embodiment, the uplink transmission timing control unit 15 and the control signal processing unit 13 are shared by all passive optical communication networks by providing the multiplexing unit 16 between the decoding units 112 and the distribution unit 14 of # 1 to # m1. In addition, the distribution unit 14 is shared by some passive optical communication networks. Thereby, the thirteenth embodiment reduces the functions required for each passive optical communication network, and realizes cost reduction of the terminal device 91.

  The difference between the thirteenth embodiment and the twelfth embodiment is that one distribution unit 14 does not accommodate all passive optical communication networks, but only some passive optical communication networks. Therefore, the thirteenth embodiment has an effect of reducing the problem of the twelfth embodiment. That is, by reducing the number of signals to be multiplexed, the buffer amount required for the multiplexing unit 16 immediately before the plurality of accommodation distribution units 14 and the wiring 21-3 between the plurality of accommodation distribution units 14 and the multiplexing unit 16 immediately before the plurality of accommodation distribution units 14 are reduced. It is possible to reduce the transmission band necessary for the transmission. In addition, since the thirteenth embodiment includes more sorting units 14 and 114 than the twelfth embodiment, the function of the sorting unit 14 can be simplified.

(Embodiment 14)
The fourteenth embodiment will be described with reference to FIG. The terminal device 91 according to the present embodiment is an example in which the uplink transmission timing control unit 15, the control signal processing unit 13, the distribution unit 14, and the decoding unit 17 are shared by all passive optical communication networks. The difference between the fourteenth embodiment and the twelfth embodiment is that all passive optical communication networks share not only the uplink transmission timing control unit 15, the control signal processing unit 13, and the distribution unit 14, but also the decoding unit 17.

  Specifically, the terminal device 91 according to the present embodiment includes an optical receiving unit 111 for each passive optical communication network. Further, the terminal device 91 includes a multiplexing unit 18, a decoding unit 17, a distribution unit 14, an uplink transmission timing control unit 15, and a control signal processing unit 13 that are shared by all passive optical communication networks.

  Each functional block will be described. The optical receiving unit 111 has a function of converting the burst signal SAB from the passive optical communication networks # 1 to # m3 into an electric signal and transferring it to the multiplexing unit 18. The multiplexing unit 18 has a buffer function that temporarily holds signals SAB received from a plurality of ports, and a function that temporally multiplexes the signals SAB stored in the buffer and transfers the signals to the decoding unit 17. The decoding unit 17 has a function of decoding the encoded input signal SAB, removing the B-OH and the FEC parity to obtain the signal SAA, and transferring the signal SAA to the distributing unit 14.

  The distribution unit 14 multiplexes the data signal SD in the input signal SAA into a data signal SD # n and transfers the data signal SD # n to the upper communication network, and a function to transfer the MPCP Report signal RM to the upstream transmission timing control unit 15; A function of transferring other control signals SC to the control signal processing unit 13. Based on the received MPCP Report signal RM, the uplink transmission timing control unit 15 assigns the B-OH multiple band allocation method, the FEC multiple band allocation method, the B-OH and FEC multiple band allocation method, and the MPCP multiple band allocation. And a function of performing the method. The control signal processing unit 13 has a function of processing the received control signal SC.

  In the fourteenth embodiment, the multiplexing unit 18 having a large buffer is provided between the optical receiving units 111 and # m3 of # 1 to # m3, and the wiring 21 having a large transmission band between the multiplexing unit 18 and the decoding unit 17 is provided. -1 and a wiring 21-2 having a large transmission band between the decoding unit 17 and the distributing unit 14, and the upstream transmission timing control unit 15, the control signal processing unit 13, the distributing unit 14, and the decoding unit 17 Is shared by all passive optical networks. Accordingly, the fourteenth embodiment reduces functions required for each passive optical communication network, and realizes cost reduction of the terminal device 91.

  The difference between the fourteenth embodiment and the twelfth embodiment is that all passive optical communication networks share not only the uplink transmission timing control unit 15, the control signal processing unit 13, and the distribution unit 14, but also the decoding unit 17. Therefore, Embodiment 14 can reduce the function required for each passive optical communication network from Embodiment 12.

  On the other hand, in the fourteenth embodiment, the multiplexing unit 18 that requires a larger buffer than the amount necessary for the multiplexing unit 16 in the twelfth embodiment, and the wiring 21-1 having a large transmission band between the multiplexing unit 18 and the decoding unit 17 are provided. Furthermore, the wiring 21-2 having a large transmission band between the decoding unit 17 and the distribution unit 14 is required. Hereinafter, the reason why the multiplexing unit 18 of the fourteenth embodiment needs to have a larger buffer than the multiplexing unit 16 of the twelfth embodiment, and the wiring 21-1 between the multiplexing unit 18 and the decoding unit 17 is at least the decoding unit 17. The reason why a transmission band larger than the wiring 21-2 between the distribution units 14 is required, and the wiring 21-2 between the decoding unit 17 and the distribution unit 14 is at least the wiring 21- between the distribution unit 14 and the higher-level communication network. The reason why a transmission band larger than 4 is required will be described.

  First, the reason why the multiplexing unit 18 according to the fourteenth embodiment needs to have a larger buffer than the multiplexing unit 16 according to the twelfth embodiment will be described. The B-OH multi-band allocation method, the FEC multi-band allocation method, or the B-OH and FEC multi-band allocation method uses the B-OH transmission time or FEC parity transmission time of burst signals transmitted from different passive optical communication networks. In other words, the bandwidth allocation method realizes improvement in bandwidth utilization efficiency when the terminal station device 91 transfers the transmission time sum to the host communication network by superimposing the transmission time sums of both.

  Therefore, a part of the data signal before decoding transferred from the optical receiving unit 111 according to the fourteenth embodiment arrives at the multiplexing unit 18 at the same time. Therefore, in order to avoid signal loss due to collision, the multiplexing unit 18 needs to have an amount of a buffer that can temporarily hold at least the signal of the overlapped portion of B-OH and / or FEC parity. On the other hand, since the multiplexing unit 16 of the twelfth embodiment multiplexes the signal decoded by the decoding unit 112, the amount of signals received at the same time is smaller than that of the multiplexing unit 18 of the fourteenth embodiment. Therefore, the buffer amount required for the multiplexing unit 16 of the twelfth embodiment is smaller than the buffer amount required for the multiplexing unit 18 of the fourteenth embodiment.

  Next, the reason why the wiring 21-1 between the multiplexing unit 18 and the decoding unit 17 needs to have a larger transmission band than at least the wiring 21-2 between the decoding unit 17 and the distribution unit 14 will be described. The wiring 21-1 transmits data before decoding, while the wiring 21-2 transmits data after decoding. Accordingly, the wiring 21-1 needs a larger transmission band than the wiring 21-2 to the extent that it is necessary to transmit at least B-OH and FEC parity.

  Finally, the reason why the wiring 21-2 between the decoding unit 17 and the distribution unit 14 requires a transmission band larger than at least the wiring 21-4 between the distribution unit 14 and the higher-level communication network 20-n will be described. The distributing unit 14 extracts only the data signal SD from the mixed signal of the data signal and the non-data signal received from the wiring 21-2, and transfers the data signal SD to the upper communication network 20-n through the wiring 21-4. Therefore, the wiring 21-2 needs a larger transmission band than the wiring 21-4 to the extent that it is necessary to transmit the non-data signal.

(Embodiment 15)
The fifteenth embodiment will be described with reference to FIG. The terminal device 91 according to the present embodiment shares the uplink transmission timing control unit 15, the control signal processing unit 13, and the distribution unit 14 with all the passive optical communication networks, and further, the decoding unit 17 with some passive optical communication networks. This is an example of sharing. The difference between the fifteenth embodiment and the fourteenth embodiment is that one decoding unit 17 does not accommodate all passive optical communication networks but only some passive optical communication networks.

  Specifically, the terminal device 91 according to the present embodiment includes an optical receiving unit 111 for each passive optical communication network. In addition, the terminal device 91 includes a multiplexing unit 18 and a decoding unit 17 shared by the passive optical communication networks # 1 to #m, and a decoding unit 112 provided in each of the passive optical communication networks # m2 to # m3. Also, the terminal device 91 according to the present embodiment includes a multiplexing unit 16, a distribution unit 14, an uplink transmission timing control unit 15, and a control signal processing unit 13 that are shared by all passive optical communication networks. .

  Here, like the decoding unit 17 of the terminal device 91 in FIG. 15, the decoding unit 17 that accommodates a plurality of passive optical communication networks is particularly referred to as a “multiple accommodation decoding unit”. The terminal device 91 in FIG. 15 shows a configuration including one decoding unit 17 that functions as a plurality of accommodating decoding units and a decoding unit 112 that accommodates the passive optical communication networks # m2 and # m3 one by one. You may be the structure of. For example, there may be two or more multiple-accommodating decoding units 17, and all the decoding units 112 may be the multiple-accommodating decoding units 17.

  Each functional block will be described. The optical receivers 111 of # 1 to # m1 have a function of converting the burst signal SAB from the passive optical communication networks # 1 to # m1 into an electric signal and transferring it to the multiplexer 18. The optical receivers 111 of # m2 to # m3 have a function of converting the burst signal SAB from the passive optical communication networks # m2 to # m3 into electric signals and transferring them to the decoder 112, respectively. The multiplexing unit 18 has a buffer function that temporarily holds signals SAB received from a plurality of ports, and a function that temporally multiplexes the signals SAB stored in the buffer and transfers the signals to the decoding unit 17.

  The decoding units 17 and 112 have a function of decoding the encoded input signal, removing the B-OH and the FEC parity to obtain the signal SAA, and transferring the signal SAA to the multiplexing unit 16. The multiplexing unit 16 has a buffer function for temporarily holding the signals SAA received from a plurality of ports, and a function for temporally multiplexing the signals SAA stored in the buffers and transferring the signals to the distribution unit 14.

  The distribution unit 14 multiplexes the data signal SD in the input signal SAA into a data signal SD # n and transfers the data signal SD # n to the upper communication network, and a function to transfer the MPCP Report signal RM to the upstream transmission timing control unit 15; A function of transferring other control signals SC to the control signal processing unit 13. Based on the received MPCP Report signal RM, the uplink transmission timing control unit 15 assigns the B-OH multiple band allocation method, the FEC multiple band allocation method, the B-OH and FEC multiple band allocation method, and the MPCP multiple band allocation. And a function of performing the method. The control signal processing unit 13 has a function of processing the received control signal SC.

  In the fifteenth embodiment, a multiplexing unit 18 is provided between the optical receiving units 111 and decoding units 17 of # 1 to # m1, and a multiplexing unit 16 is provided between the decoding units 17 and 112 and distribution units 14 of # 1 to # m3. And the upstream transmission timing control unit 15, the control signal processing unit 13, and the distribution unit 14 are all connected to the passive optical communication by providing the wiring 21-3 having a large transmission band between the multiplexing unit 16 and the distribution unit 14. The decoding unit 17 is shared by some passive optical communication networks. Thus, the fifteenth embodiment reduces the functions required for each passive optical communication network, and realizes cost reduction of the terminal device 91.

  The difference between the fifteenth embodiment and the fourteenth embodiment is that one decoding unit 17 does not accommodate all passive optical communication networks but only some passive optical communication networks. Therefore, the fifteenth embodiment has an effect of reducing the problem of the fourteenth embodiment. In other words, by reducing the number of signals to be multiplexed, the buffer amount necessary for the multiplexing unit 18 immediately before the multiple accommodating decoding unit 17 and the wiring 21-1 between the multiple accommodating decoding unit 17 and the multiplexing unit 18 immediately preceding it are reduced. A necessary transmission band can be reduced. In addition, since the fifteenth embodiment includes more decoding units 17 and 112 than the fourteenth embodiment, the function of the decoding unit 17 can be simplified.

(Embodiment 16)
The sixteenth embodiment will be described with reference to FIG. The terminal device 91 according to the present embodiment shares the uplink transmission timing control unit 15 and the control signal processing unit 13 with all the passive optical communication networks, shares the distribution unit 14 with some passive optical communication networks, In this example, the decoding unit 17 is shared by some passive optical communication networks. The difference between the sixteenth embodiment and the fifteenth embodiment is that one distribution unit 14 does not accommodate all passive optical communication networks but only some passive optical communication networks.

  Specifically, the terminal device 91 according to the present embodiment includes an optical receiving unit 111 for each passive optical communication network. Also, the terminal device 91 according to the present embodiment includes a multiplexing unit 18 and a decoding unit 17 shared by the passive optical communication networks # 1 to # m1, and a decoding unit 112 provided in each of the passive optical communication networks # m2 to # m3. The multiplexing unit 16 and the distribution unit 14 shared by the passive optical communication networks # 1 to # m2, and the distribution unit 114 provided to the passive optical communication network # m3. The terminal device 91 includes multiplexing units 121, 122, and 123 that are shared by all passive optical communication networks, an uplink transmission timing control unit 15, and a control signal processing unit 13.

  Here, like the decoding unit 17 of the terminal device 91 in FIG. 16, the decoding unit 17 that accommodates a plurality of passive optical communication networks is particularly referred to as a “multiple accommodation decoding unit”. The terminal device 91 in FIG. 16 shows a configuration including one decoding unit 17 that functions as a plurality of accommodating decoding units and a decoding unit 112 that accommodates the passive optical communication networks # m2 and # 3 one by one. You may be the structure of. For example, two or more multi-accommodating decoding units 17 may exist, or all the decoding units may be the multi-accommodating decoding unit 17.

  In addition, like the distribution unit 14 of the terminal device 91 of FIG. 16, the distribution unit 14 that accommodates a plurality of passive optical communication networks is particularly referred to as a “multiple accommodation distribution unit”. The terminal device 91 in FIG. 16 shows a configuration including one distribution unit 14 that functions as a plurality of storage distribution units and a distribution unit 114 that stores the passive optical communication network # m3 one by one. It does not matter. For example, there may be two or more multiple distribution units 14, or all the distribution units may be the multiple distribution unit 14.

  Each functional block will be described. The optical receivers 111 of # 1 to # m1 have a function of converting the burst signal SAB from the passive optical communication networks # 1 to # m1 into an electric signal and transferring it to the multiplexer 18. The optical receivers 111 of # m2 to # m3 have a function of converting the burst signal SAB from the passive optical communication networks # m2 to # m3 into an electric signal and transferring it to the decoder 112. The multiplexing unit 18 has a buffer function that temporarily holds signals SAB received from a plurality of ports, and a function that temporally multiplexes the signals SAB stored in the buffer and transfers the signals to the decoding unit 17.

  The decoding units 112 of # 1 to # m2 have a function of decoding the encoded input signal SAB, removing the B-OH and the FEC parity to obtain the signal SAA, and transferring the signal SAA to the multiplexing unit 16. The # m3 decoding unit 112 has a function of decoding the encoded input signal, removing the B-OH and the FEC parity to obtain a signal SAA, and transferring the signal SAA to the distribution unit 114.

  The multiplexing unit 16 has a buffer function for temporarily holding the signals SAA received from a plurality of ports, and a function for temporally multiplexing the signals SAA stored in the buffers and transferring the signals to the distribution unit 14. The distributing units 14 and 114 transfer the data signal SD in the input signal SAA to the multiplexing unit 121, transfer the MPCP Report signal RM to the multiplexing unit 122, and transfer other control signals SC to the multiplexing unit 123. And a function to perform.

  The multiplexing unit 121 temporarily buffers the signals SD received from a plurality of ports, and temporally multiplexes the signals SD stored in the buffers into a data signal SD # n, which is transferred to the higher-level communication network. It has a function. The multiplexing unit 122 has a buffer function that temporarily holds signals RM received from a plurality of ports, and a function that temporally multiplexes the signals RM stored in the buffer and transfers the signals to the uplink transmission timing control unit 15. The multiplexing unit 123 has a buffer function for temporarily holding the signals SC received from a plurality of ports, and a function for temporally multiplexing the signals SC stored in the buffers and transferring them to the control signal processing unit 13.

  Based on the received MPCP Report signal RM, the uplink transmission timing control unit 15 assigns the B-OH multiple band allocation method, the FEC multiple band allocation method, the B-OH and FEC multiple band allocation method, and the MPCP multiple band allocation. And a function of performing the method. The control signal processing unit 13 has a function of processing the received control signal SC.

  In the sixteenth embodiment, the multiplexing unit 18 is provided between the optical receiving unit 111 and the decoding unit 17, and the multiplexing unit 16 is provided between the decoding units 17 and 112 and the distribution unit 14, so that the uplink transmission timing control unit 15 The control signal processing unit 13 is shared by all passive optical communication networks, the decoding unit 17 is shared by some passive optical communication networks, and the distribution unit 14 is shared by some passive optical communication networks. As a result, the sixteenth embodiment reduces the functions required for each passive optical communication network and realizes cost reduction of the terminal device 91.

  The difference between the sixteenth embodiment and the fifteenth embodiment is that one distribution unit 14 does not accommodate all passive optical communication networks but only some passive optical communication networks. Therefore, the sixteenth embodiment has an effect of reducing the problem of the fifteenth embodiment. That is, by reducing the number of signals to be multiplexed, the buffer amount required for the multiplexing unit 16 immediately before the plurality of accommodation distribution units 14 and the wiring 21-3 between the plurality of accommodation distribution units 14 and the multiplexing unit 16 immediately before the plurality of accommodation distribution units 14 are reduced. It is possible to reduce the transmission band necessary for the transmission. Further, since the sixteenth embodiment includes more sorting units 14 and 114 than the fifteenth embodiment, the function of the sorting unit 14 can be simplified.

  The present invention can be applied to the information communication industry.

11: Transmission / reception function unit 12: Concentration function unit 13: Control signal processing unit 14: Distribution unit 15: Uplink transmission timing control unit 16: Multiplexing unit 17: Decoding unit 18: Multiplexing unit 91: Terminal station device 92: Subscriber line termination Device 111: Optical receiving unit 112: Decoding unit 113: Control signal processing unit 114: Distribution unit 115: Uplink transmission timing control unit 121: Multiplexing unit 122: Multiplexing unit 123: Multiplexing unit 125: Concentration uplink transmission timing control unit

Claims (9)

A plurality of optical receivers for accommodating one or more subscriber line terminators, controlling uplink transmission timing of the subscriber line terminator and transmitting a burst signal transmitted from the subscriber line terminator A terminal device for transferring data to a higher-level communication network,
A plurality of optical receivers for receiving the burst signal transmitted from the subscriber line termination device;
A plurality of decoding units for decoding each burst signal received by the plurality of optical receiving units for each burst signal received by the optical receiving unit;
The transmission data that is included in each burst signal decoded by the decoding unit, the transmission data transmitted from the subscriber line terminating device, and the transmission for determining the timing at which the subscriber line terminating device transmits a signal to the optical receiving unit A plurality of distribution units for separating data-related information and a control signal for controlling the subscriber line termination device for each burst signal received by the optical reception unit;
A data signal multiplexing unit that multiplexes the transmission data included in the reception signals of the plurality of optical reception units output from the plurality of distribution units and transfers the multiplexed data to an upper communication network;
Based on information related to the transmission data included in the reception signals of the plurality of optical reception units output from the distribution unit, an uplink signal timing at which the subscriber line termination device transmits a signal to the optical reception unit, Concentrated uplink transmission timing control unit that is assigned to each of the optical receiving units so that the transmission time of the portion of the burst signal that is not transferred in a burst overlaps between the plurality of optical receiving units,
A plurality of uplink transmission timing controllers assigned to each subscriber line terminator accommodated in the optical receiver, the uplink transmission timing assigned from the concentric uplink transmission timing controller for each optical receiver;
Based on the control signal output from the distribution unit, a control signal processing unit that executes control for the subscriber line termination device accommodated in the plurality of optical receiving units;
A terminal device comprising: A plurality of optical receivers for accommodating one or more subscriber line terminators, controlling uplink transmission timing of the subscriber line terminator and transmitting a burst signal transmitted from the subscriber line terminator A terminal device for transferring data to a higher-level communication network,
A plurality of optical receivers for receiving the burst signal transmitted from the subscriber line termination device;
A plurality of decoding units for decoding each burst signal received by the plurality of optical receiving units for each burst signal received by the optical receiving unit;
The transmission for determining the transmission data transmitted from the subscriber line terminator included in each burst signal decoded by the decoder and the timing at which the subscriber line terminator transmits a signal to the optical receiver. A plurality of sorting units that separate data-related information for each burst signal received by the optical receiving unit;
A data signal multiplexing unit that multiplexes the transmission data included in the reception signals of the plurality of optical reception units output from the plurality of distribution units and transfers the multiplexed data to an upper communication network;
Based on information related to the transmission data included in the reception signals of the plurality of optical reception units transferred from the distribution unit, an uplink signal timing at which the subscriber line termination device transmits a signal to the optical reception unit, An uplink transmission timing control unit that is assigned to each of the subscriber line termination devices so that a transmission time of a portion of the burst signal that is not transferred in a burst overlaps between the plurality of optical reception units;
A terminal device comprising: The plurality of distribution units further separates a control signal for controlling the subscriber line termination device included in the burst signal received by the optical reception unit for each burst signal received by the optical reception unit. And
Based on the control signals output from the plurality of distribution units, a control signal processing unit that executes control for the subscriber line termination device accommodated in the plurality of optical reception units,
The terminal device according to claim 2, further comprising: A plurality of optical receivers for accommodating one or more subscriber line terminators, controlling uplink transmission timing of the subscriber line terminator and transmitting a burst signal transmitted from the subscriber line terminator A terminal device for transferring data to a higher-level communication network,
A plurality of optical receivers for receiving the burst signal transmitted from the subscriber line termination device;
A plurality of decoding units for decoding each burst signal received by the plurality of optical receiving units for each burst signal received by the optical receiving unit;
A decoded signal multiplexing unit that multiplexes signals output from the plurality of decoding units;
The transmission data transmitted from the subscriber line terminator included in the signal multiplexed by the decoded signal multiplexer, the timing for determining the timing at which the subscriber line terminator transmits a signal to the optical receiver A distribution unit for separating information on transmission data and a control signal for controlling the subscriber line termination device by a predetermined method, and transferring the transmission data to a higher-level communication network;
Based on the information on the transmission data output from the distribution unit, the uplink signal timing at which the subscriber line termination device transmits a signal to the optical reception unit, the portion of the burst signal that is not transferred in a burst, An uplink transmission timing control unit that is assigned to each of the subscriber line termination devices so that a transmission time overlaps between the plurality of optical reception units;
Based on the control signal output from the distribution unit, a control signal processing unit that executes control for the subscriber line termination device accommodated in the plurality of optical receiving units;
A terminal device comprising: A second optical receiver for receiving the burst signal transmitted from the subscriber line termination device;
A second decoding unit that decodes the burst signal received by the second optical receiving unit for each burst signal received by the second optical receiving unit;
A second distribution unit that separates the transmission data, information about the transmission data, and the control signal included in the signal decoded by the second decoding unit;
A data signal multiplexing unit that multiplexes the transmission data output from the distribution unit and the second distribution unit and transfers the multiplexed data to a higher-level communication network;
Further comprising
The control signal processing unit includes the subscriber line termination device and the second light accommodated in the plurality of optical reception units based on the control signals output from the distribution unit and the second distribution unit. Performing control on the subscriber line termination device accommodated in the receiving unit;
The uplink transmission timing control unit is configured so that the subscriber line terminating device is configured to receive the optical receiving unit and the second transmission unit based on information on the transmission data output from the distribution unit and the second distribution unit. The uplink transmission timing for transmitting a signal to the optical receiver is set so that the transmission times of the portions of the burst signal that are not transferred in the burst overlap between the plurality of optical receivers and the second optical receiver. Allocating for each subscriber line terminating device,
The terminal device according to claim 4. A plurality of optical receivers for accommodating one or more subscriber line terminators, controlling uplink transmission timing of the subscriber line terminator and transmitting a burst signal transmitted from the subscriber line terminator A terminal device for transferring data to a higher-level communication network,
A plurality of optical receivers for receiving the burst signal transmitted from the subscriber line termination device;
A received signal multiplexer for multiplexing each burst signal received by the plurality of optical receivers;
A decoding unit for decoding the signal output from the received signal multiplexing unit;
The transmission data transmitted from the subscriber line terminator included in the signal decoded by the decoder, and the transmission data for determining the timing at which the subscriber line terminator transmits a signal to the optical receiver A distribution unit that separates the control signal for controlling the information on the subscriber line termination device and the transmission data to the upper communication network;
Based on the information related to the transmission data for each subscriber line termination device output from the distribution unit, the uplink signal timing at which the subscriber line termination device transmits a signal to the optical reception unit is determined from among the burst signals. An uplink transmission timing control unit that is assigned to each of the subscriber line termination devices so that the transmission time of the portion that is not transferred in a burst overlaps between the plurality of optical receiving units,
Based on the control signal output from the distribution unit, a control signal processing unit that executes control for the subscriber line termination device accommodated in the plurality of optical receiving units;
A terminal device comprising: A second optical receiver for receiving the burst signal transmitted from the subscriber line termination device;
A second decoding unit that decodes each burst signal received by the second optical receiving unit for each burst signal received by the second optical receiving unit;
A decoded signal multiplexing unit that multiplexes output signals of the decoding unit and the second decoding unit and outputs the multiplexed signals to the distribution unit;
The terminal device according to claim 6, further comprising: A plurality of optical receivers for accommodating one or more subscriber line terminators, controlling uplink transmission timing of the subscriber line terminator and transmitting a burst signal transmitted from the subscriber line terminator A reception method of a terminal device that transfers data to a higher-level communication network,
A plurality of optical receivers for receiving a burst signal transmitted from the subscriber line terminating device; and
A decoding procedure in which a plurality of decoding units provided for each optical receiving unit decodes a burst signal received by the optical receiving unit;
Control signals for controlling the transmission data, the information on the transmission data, and the subscriber line termination device included in each burst signal decoded by the decoding unit, a plurality of distribution units provided for each optical receiving unit Sorting procedure to separate,
A data signal multiplexing unit provided in common to the plurality of optical receiving units, a data signal multiplexing procedure for multiplexing the transmission data output from the plurality of distributing units and transferring the multiplexed data to an upper communication network;
A concentric uplink transmission timing control unit provided in common to the plurality of optical reception units is configured to signal the subscriber line termination device to the optical reception unit based on information on the transmission data output from the plurality of distribution units. Is assigned to each of the optical receivers so that the transmission time of the portion of the burst signal that is not transferred in a burst overlaps between the plurality of optical receivers. An uplink transmission timing control procedure in which a plurality of uplink transmission timing control units included in the network assigns the uplink transmission timing assigned from the concentrated uplink transmission timing control unit to each of the subscriber line terminating devices accommodated in the optical receiving unit. When,
A control signal processing unit provided in common to the plurality of optical reception units controls the subscriber line termination device accommodated in the plurality of optical reception units based on the control signals output from the plurality of distribution units. A control signal processing procedure for executing
The reception method of the terminal station apparatus which performs. A plurality of optical receivers for accommodating one or more subscriber line terminators, controlling uplink transmission timing of the subscriber line terminator and transmitting a burst signal transmitted from the subscriber line terminator A reception method of a terminal device that transfers data to a higher-level communication network,
A plurality of optical receivers for receiving a burst signal transmitted from the subscriber line terminating device; and
A decoding procedure in which a plurality of decoding units provided for each optical receiving unit decodes a burst signal received by the optical receiving unit;
A plurality of distribution units provided for each optical reception unit, a distribution procedure for separating the transmission data and information related to the transmission data included in each burst signal decoded by the decoding unit;
A data signal multiplexing unit provided in common to the plurality of optical receiving units, a data signal multiplexing procedure for multiplexing the transmission data output from the plurality of distributing units and transferring the multiplexed data to an upper communication network;
The uplink transmission timing control unit provided in common to the plurality of optical reception units transmits a signal to the optical reception unit from the subscriber line termination device based on the information on the transmission data output from the plurality of distribution units An uplink transmission timing control procedure for allocating the uplink signal timing for each subscriber line termination device so that the transmission time of the portion of the burst signal that is not transferred in the burst overlaps between the plurality of optical receivers, ,
The reception method of the terminal station apparatus which performs.

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