JP5801768B2 - Bandwidth allocation method and terminal device - Google Patents

Bandwidth allocation method and terminal device Download PDF

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JP5801768B2
JP5801768B2 JP2012142390A JP2012142390A JP5801768B2 JP 5801768 B2 JP5801768 B2 JP 5801768B2 JP 2012142390 A JP2012142390 A JP 2012142390A JP 2012142390 A JP2012142390 A JP 2012142390A JP 5801768 B2 JP5801768 B2 JP 5801768B2
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transmission
function unit
subscriber line
delay time
time
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JP2014007605A (en
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慈仁 酒井
慈仁 酒井
坂本　健
健 坂本
憲行 太田
憲行 太田
康隆 木村
康隆 木村
裕隆 氏川
裕隆 氏川
隆 光井
隆 光井
雲瀚 王
雲瀚 王
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Nippon Telegraph and Telephone Corp
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本発明は、各加入者線終端装置からの送信信号が衝突しないように加入者線終端装置に対してそれぞれの送信開始時間の割り当てる帯域割り当て方法に関する。   The present invention relates to a bandwidth allocation method for assigning transmission start times to subscriber line termination devices so that transmission signals from the subscriber line termination devices do not collide with each other.

端局装置と複数の加入者線終端装置とが接続された受動光通信網においては、端局装置と加入者線終端装置の間の通信は時分割多重方式により多重化されている。このような受動光通信網は、１台の端局装置を複数のユーザで共用することから低コストにサービスを提供することが可能である。   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 multiplexed by a time division multiplexing method. Such a passive optical communication network can provide a service at low cost since one terminal device is shared by a plurality of users.

また、１台の端局装置で複数の受動光通信網を収容し、さらに端局装置内に集線機能部を設けることによりコアネットワーク側の接続ポート数を削減し、配線の簡略化やサービスの更なる低コスト化を行う例として、特許文献１の構成を説明する。   In addition, a single terminal device accommodates a plurality of passive optical communication networks, and a concentrating function unit is provided in the terminal device, thereby reducing the number of connection ports on the core network side, simplifying wiring, As an example of further cost reduction, the configuration of Patent Document 1 will be described.

特許文献１の端局装置は集線機能部と複数の送受信機能部を持ち、それぞれの送受信機能部に受動光通信網が接続される。受動光通信網は加入者線終端装置が複数台接続されるＰ２ＭＰ接続であることから加入者線終端装置から端局装置への通信については端局装置による各加入者線終端装置の送信時間の制御が必須であるが、複数の受動光通信網に収容された加入者線終端装置の送信時間制御を端局装置内部の集線機能部にて一括で行うことにより制御部を集約し、低コスト化を実現している。   The terminal device of Patent Document 1 has a concentrator function unit and a plurality of transmission / reception function units, and a passive optical communication network is connected to each transmission / reception function unit. Since the passive optical communication network is a P2MP connection in which a plurality of subscriber line terminators are connected, the transmission time of each subscriber line terminator by the terminal station device is determined for communication from the subscriber line terminator to the terminal device. Control is indispensable, but the transmission time control of the subscriber line termination equipment accommodated in multiple passive optical communication networks is performed collectively by the concentrator function section inside the terminal equipment, thereby consolidating the control section and reducing the cost. Has been realized.

特開２０１２−１５７３７号公報JP 2012-15737 A

端局装置内の集線機能部と複数の送受信機能部とが接続され、さらに送受信機能部と複数の加入者線終端装置とが接続され、集線機能部が各加入者線終端装置のデータ送信開始時刻およびデータ送信量を制御する受動光通信網では、データフレームの衝突回避のために集線機能部が加入者線終端装置から集線機能部までの遅延時間を把握する必要がある。
集線機能部と加入者線終端装置の間には送受信機能部が存在することから遅延時間は光伝搬時間および送受信機能部における処理遅延時間の合算により表されるが、送受信機能部の処理遅延時間は送受信機能部のソフトウェアアップデート、あるいは送受信機能部に対する設定変更、例えばデータ信号の暗号化・復号化処理や誤り訂正処理の有効・無効設定変更、送受信機能部でのＶＬＡＮハンドリング処理設定変更、といった原因により変化する場合がある。 The concentrator function unit in the terminal device is connected to a plurality of transmission / reception function units, and the transmission / reception function unit and a plurality of subscriber line terminators are connected, and the concentrator function unit starts data transmission of each subscriber line termination device. In a passive optical communication network that controls time and data transmission amount, it is necessary for the line concentrator to grasp the delay time from the subscriber line termination device to the line concentrator in order to avoid collision of data frames.
Since there is a transmission / reception function unit between the line concentration function unit and the subscriber line termination device, the delay time is represented by the sum of the optical propagation time and the processing delay time in the transmission / reception function unit. Causes such as software update of the transmission / reception function unit, or setting change for the transmission / reception function unit, for example, change of valid / invalid setting of data signal encryption / decryption processing and error correction processing, change of VLAN handling processing setting in the transmission / reception function unit May vary.

送受信機能部の処理遅延時間が大きく変化した場合、データフレームの衝突や、データフレーム衝突回避のためのリンク切断が発生する。   When the processing delay time of the transmission / reception function unit changes greatly, data frame collision or link disconnection for avoiding data frame collision occurs.

そこで本発明は、送受信機能部の処理遅延時間が変化した場合であってもデータフレームの衝突やリンク切断なく通信継続を可能とすることを目的とする。   Therefore, an object of the present invention is to enable communication continuation without collision of data frames or link disconnection even when the processing delay time of the transmission / reception function unit changes.

上記目的を達成するため、本発明では、端局装置内の送受信機能部が処理遅延時間の変化を検知して集線機能部へ通知し、集線機能部が、処理遅延時間の変化に応じて各加入者線終端装置のデータ送信開始時刻を指定するか、或いは、処理時間の変化量をバッファ機能部にて吸収することを特徴とする。   In order to achieve the above object, in the present invention, the transmission / reception function unit in the terminal device detects a change in the processing delay time and notifies the concentration function unit, and the concentration function unit responds to the change in the processing delay time. It is characterized in that the data transmission start time of the subscriber line terminating device is designated or the amount of change in processing time is absorbed by the buffer function unit.

本発明に係る帯域割り当て方法は、集線機能部及び複数の送受信機能部を持つ端局装置と前記端局装置の送受信機能部にそれぞれ複数の加入者線終端装置とが接続された受動光通信網における帯域割り当て方法であって、加入者線終端装置と集線機能部との間の遅延時間を取得する遅延時間取得手順と、前記遅延時間取得手順により取得した遅延時間に基づき、加入者線終端装置からの信号が互いに衝突しないよう加入者線終端装置ごとの送信開始時刻を算出する送信開始時刻算出手順と、を有する。   A band allocation method according to the present invention includes a passive optical communication network in which a terminal station device having a concentrating function unit and a plurality of transmission / reception function units, and a plurality of subscriber line termination devices connected to the transmission / reception function units of the terminal station device, respectively. A bandwidth allocation method according to claim 1, wherein a delay time acquisition procedure for acquiring a delay time between the subscriber line termination device and the concentrator function unit, and a subscriber line termination device based on the delay time acquired by the delay time acquisition procedure And a transmission start time calculation procedure for calculating a transmission start time for each subscriber line terminating device so that signals from each other do not collide with each other.

本発明に係る帯域割り当て方法は、集線機能部が各加入者線終端装置と集線機能部の間のデータ転送に関わる遅延時間を取得し、各加入者線終端装置のデータ送信開始時刻を指定するため、データフレームの衝突を回避することができる。   In the bandwidth allocation method according to the present invention, the concentrating function unit acquires a delay time related to data transfer between each subscriber line terminating device and the concentrating function unit, and designates the data transmission start time of each subscriber line terminating device. Therefore, data frame collision can be avoided.

本発明に係る帯域割り当て方法は、各送受信機能部がバッファ機能部を有し、データ信号の処理時間が変化した場合であっても処理時間の変化量をバッファ機能部にて吸収し、各送受信機能部における処理遅延時間を一定とするため、データフレームの衝突を回避することができる。   In the bandwidth allocation method according to the present invention, each transmission / reception function unit has a buffer function unit, and even if the processing time of the data signal changes, the change amount of the processing time is absorbed by the buffer function unit, Since the processing delay time in the functional unit is constant, data frame collision can be avoided.

本発明に係る帯域割り当て方法では、送受信機能部が、データ信号の処理時間に変化が生じたことを検知して集線機能部に対して通知する処理時間変更通知手順をさらに有し、前記処理時間変更通知手順を契機に前記遅延時間取得手順を実行してもよい。
本発明により、各送受信機能部内でのデータ信号の処理時間が変化した場合に処理時間が変更されたことを集線機能部に対して通知するため、各送受信機能部からの通知に基づき集線機能部が再度各加入者線終端装置と集線機能部の間の遅延時間を取得しなおすことができる。 The bandwidth allocation method according to the present invention further includes a processing time change notification procedure in which the transmission / reception function unit detects that a change has occurred in the processing time of the data signal and notifies the concentration function unit, and the processing time The delay time acquisition procedure may be executed in response to the change notification procedure.
According to the present invention, when the processing time of the data signal in each transmission / reception function unit changes, the concentration function unit is notified based on the notification from each transmission / reception function unit to notify the concentration function unit that the processing time has been changed. However, the delay time between each subscriber line terminator and the concentrator function unit can be acquired again.

本発明に係る帯域割り当て方法では、前記遅延時間取得手順において、送受信機能部における処理時間の変化量を集線機能部に対して通知し、集線機能部が通知された変化量に応じて加入者線終端装置と集線機能部との間の遅延時間を補正してもよい。
本発明により、各送受信機能部内でのデータ信号の処理時間が変化した場合に処理時間の変化量を集線機能部に対して通知し、各送受信機能部からの通知に基づき集線機能部内部に保存された各加入者線終端装置と集線機能部の間の遅延時間の値を補正することができる。 In the bandwidth allocation method according to the present invention, in the delay time acquisition procedure, the amount of change in the processing time in the transmission / reception function unit is notified to the line concentration function unit, and the subscriber line according to the amount of change notified by the line concentration function unit You may correct | amend the delay time between a termination | terminus apparatus and a concentrating function part.
According to the present invention, when the processing time of the data signal in each transmission / reception function section changes, the amount of change in the processing time is notified to the concentration function section, and stored in the concentration function section based on the notification from each transmission / reception function section It is possible to correct the value of the delay time between each subscriber line terminating device and the concentrating function unit.

本発明に係る端局装置は、集線機能部及び複数の送受信機能部を持つ端局装置と前記端局装置の送受信機能部にそれぞれ複数の加入者線終端装置とが接続された受動光通信網における端局装置であって、前記集線機能部が、加入者線終端装置と集線機能部との間の遅延時間を取得し、取得した遅延時間に基づき、加入者線終端装置からの信号が互いに衝突しないよう加入者線終端装置ごとの送信開始時刻を算出する。   A terminal station device according to the present invention is a passive optical communication network in which a terminal station device having a concentrating function unit and a plurality of transmission / reception function units, and a plurality of subscriber line termination devices are connected to the transmission / reception function units of the terminal station device, respectively. The line concentrating function unit obtains a delay time between the subscriber line terminating device and the line concentrating function unit, and based on the obtained delay time, signals from the subscriber line terminating device are mutually connected. The transmission start time for each subscriber line termination device is calculated so as not to collide.

なお、上記各発明は、可能な限り組み合わせることができる。   The above inventions can be combined as much as possible.

本発明によれば、送受信機能部の処理遅延時間が変化した場合であってもデータフレームの衝突やリンク切断なく通信継続を行うことができる。   According to the present invention, communication can be continued without a data frame collision or link disconnection even when the processing delay time of the transmission / reception function unit changes.

本実施形態に係る通信システムの構成例を示す。The structural example of the communication system which concerns on this embodiment is shown. 実施形態１における遅延時間取得手順の一例を示すフロー図である。It is a flowchart which shows an example of the delay time acquisition procedure in Embodiment 1. 遅延時間取得処理の一例を示すシーケンス図である。It is a sequence diagram which shows an example of a delay time acquisition process. 処理時間変更通知手順の一例を示すフロー図である。It is a flowchart which shows an example of a process time change notification procedure. 実施形態２における遅延時間取得手順の一例を示すフロー図である。FIG. 10 is a flowchart showing an example of a delay time acquisition procedure in the second embodiment. 実施形態２における遅延時間補正手順の一例を示すフロー図である。FIG. 10 is a flowchart showing an example of a delay time correction procedure in the second embodiment. 実施形態２における処理時間変更量通知手順の一例を示すフロー図である。FIG. 10 is a flowchart illustrating an example of a processing time change amount notification procedure according to the second embodiment. 実施形態３における遅延時間取得手順の一例を示すフロー図である。FIG. 10 is a flowchart illustrating an example of a delay time acquisition procedure in the third embodiment. 実施形態３におけるバッファ機能部の動作例を示すフロー図である。FIG. 10 is a flowchart showing an operation example of a buffer function unit in the third embodiment. 実施形態３における処理時間調整手順の一例を示すフロー図である。FIG. 10 is a flowchart illustrating an example of a processing time adjustment procedure in the third embodiment.

添付の図面を参照して本発明の実施形態を説明する。以下に説明する実施形態は本発明の実施の例であり、本発明は、以下の実施形態に制限されるものではない。なお、本明細書及び図面において符号が同じ構成要素は、相互に同一のものを示すものとする。   Embodiments of the present invention will be described with reference to the accompanying drawings. The embodiments described below are examples of the present invention, and the present invention is not limited to the following embodiments. In the present specification and drawings, the same reference numerals denote the same components.

（実施形態１）
図１から図４を用いて第一の実施形態を説明する。本実施形態は本発明の基本的な実施形態であり、図１に示すように端局装置１００内に集線機能部１０１と複数の送受信機能部１１１〜１１Ｍが備わり、さらに各送受信機能部１１１〜１１Ｍに複数の加入者線終端装置１２１〜１２Ｎが接続された受動光通信網において、集線機能部１０１が集線機能部１０１と加入者線終端装置１２１〜１２Ｎの間の遅延時間を取得し、遅延時間が変更された際に再度取得を行う例である。 (Embodiment 1)
The first embodiment will be described with reference to FIGS. 1 to 4. The present embodiment is a basic embodiment of the present invention. As shown in FIG. 1, the terminal device 100 includes a concentrator function unit 101 and a plurality of transmission / reception function units 111 to 11M. In the passive optical communication network in which a plurality of subscriber line terminators 121 to 12N are connected to 11M, the line concentrating function unit 101 acquires the delay time between the line concentrating function unit 101 and the subscriber line terminators 121 to 12N, and the delay In this example, the acquisition is performed again when the time is changed.

集線機能部１０１は複数の通信ポートを持っており、それぞれ送受信機能部１１１〜１１ＭとＰ２Ｐ接続されている。また送受信機能部１１１と加入者線終端装置１２１〜１２Ｎとの間はＰ２ＭＰ接続であり、時分割多重方式による多重化が行われている。送受信機能部１１１から加入者線終端装置１２１〜１２Ｎへの通信は、送受信機能部１１１からの送出時に時間的に多重化され送信される。加入者線終端装置１２１〜１２Ｎから送受信機能部１１１への通信は、各加入者線終端装置からの送信信号が衝突しないよう集線機能部１０１により加入者線終端装置１２１〜１２Ｎに対してそれぞれの送信開始時間の割り当てが行われる。このとき、送信開始時刻算出手順を実行する。送信開始時刻算出手順では、遅延時間取得手順により取得した遅延時間に基づき加入者線終端装置１２１〜１２Ｎからの信号が互いに衝突しないよう加入者線終端装置１２１〜１２Ｎごとの送信開始時刻を算出する。加入者線終端装置１２１〜１２Ｎから送受信機能部１１１へと送信されたデータは、送受信機能部１１１内部で所定の処理が行われた後、集線機能部１０１へと送信される。   The line concentrating function unit 101 has a plurality of communication ports and is connected to the transmission / reception function units 111 to 11M by P2P. Further, the transmission / reception function unit 111 and the subscriber line termination devices 121 to 12N are connected by P2MP, and multiplexing is performed by a time division multiplexing method. Communication from the transmission / reception function unit 111 to the subscriber line termination devices 121 to 12N is multiplexed and transmitted in time when transmitted from the transmission / reception function unit 111. Communication from the subscriber line termination devices 121 to 12N to the transmission / reception function unit 111 is performed for each of the subscriber line termination devices 121 to 12N by the line concentration function unit 101 so that transmission signals from the subscriber line termination devices do not collide with each other. Transmission start time is assigned. At this time, a transmission start time calculation procedure is executed. In the transmission start time calculation procedure, the transmission start time for each of the subscriber line termination devices 121 to 12N is calculated based on the delay time acquired by the delay time acquisition procedure so that the signals from the subscriber line termination devices 121 to 12N do not collide with each other. . The data transmitted from the subscriber line termination devices 121 to 12N to the transmission / reception function unit 111 is transmitted to the line concentration function unit 101 after predetermined processing is performed in the transmission / reception function unit 111.

この一連の動作を行うにあたり、加入者線終端装置１２１〜１２Ｎからの送信信号が衝突しないよう送信開始時間を割り当てるためには、集線機能部１０１は加入者線終端装置１２１〜１２Ｎにおけるデータ送信から、集線機能部１０１におけるデータ受信までの遅延時間を把握する必要がある。そこで、本実施形態に係る帯域割り当て方法は、送信開始時刻算出手順の前に、処理時間変更通知手順及び遅延時間取得手順を順に実行する。   In performing this series of operations, in order to assign a transmission start time so that transmission signals from the subscriber line terminating devices 121 to 12N do not collide, the line concentrating function unit 101 starts from data transmission in the subscriber line terminating devices 121 to 12N. Therefore, it is necessary to grasp the delay time until data reception in the line concentrating function unit 101. Therefore, the bandwidth allocation method according to the present embodiment sequentially executes the processing time change notification procedure and the delay time acquisition procedure before the transmission start time calculation procedure.

処理時間変更通知手順では、端局装置１００の送受信機能部１１１〜１１Ｍが、送受信機能部におけるデータ信号の処理時間に変化が生じたことを検知して処理時間が変化したことを集線機能部１０１に対して通知する。   In the processing time change notification procedure, the transmission / reception function units 111 to 11M of the terminal device 100 detect that the processing time of the data signal in the transmission / reception function unit has changed, and indicate that the processing time has changed. To notify.

端局装置１００の集線機能部１０１が処理時間変更通知手順により送受信機能部１１１〜１１Ｍでの処理時間変更を通知された際に遅延時間取得処理を実行する。遅延時間取得処理では、加入者線終端装置１２１〜１２Ｎに対して集線機能部１０１と加入者線終端装置１２１〜１２Ｎとが通信を行う際の送受信機能部１１１〜１１Ｍにおける処理時間を含めた遅延時間を取得する。   When the concentrating function unit 101 of the terminal device 100 is notified of the processing time change in the transmission / reception function units 111 to 11M by the processing time change notification procedure, the delay time acquisition process is executed. In the delay time acquisition process, the delay including the processing time in the transmission / reception function units 111 to 11M when the line concentrating function unit 101 and the subscriber line termination devices 121 to 12N communicate with the subscriber line termination devices 121 to 12N. Get time.

集線機能部１０１が各加入者線終端装置との間の遅延時間を取得する例を図２から図３に示す。
加入者線終端装置が新規に接続されたか否かを判定するとともに（Ｓ２０１）、送受信機能部１１１〜１１Ｍより処理時間変更通知を受信したか否かを判定する（Ｓ２０２）。遅延時間取得処理Ｓ２０３は、加入者線終端装置が新規に接続された場合（Ｓ２０１においてＹｅｓ）、あるいは送受信機能部１１１〜１１Ｍより処理時間変更通知を受信した場合（Ｓ２０２においてＹｅｓ）に実行する必要がある。なお、遅延時間取得処理Ｓ２０３の実行契機はこれらに限られず、他の契機にて実行、あるいは定期的に実行してもよい。また、遅延時間取得処理Ｓ２０３実行対象は、新規に接続された加入者線終端装置や送受信機能部１１１〜１１Ｍのうち処理遅延時間に変化があった送受信機能部に接続された加入者線終端装置のみでもよいし、全ての加入者線終端装置であってもよい。 An example in which the line concentrator 101 acquires a delay time between each subscriber line termination device is shown in FIGS.
It is determined whether or not the subscriber line termination device is newly connected (S201), and it is determined whether or not a processing time change notification is received from the transmission / reception function units 111 to 11M (S202). The delay time acquisition process S203 needs to be executed when a subscriber line terminating device is newly connected (Yes in S201) or when a processing time change notification is received from the transmission / reception function units 111 to 11M (Yes in S202). There is. The execution trigger of the delay time acquisition process S203 is not limited to these, and may be executed at other triggers or periodically. Further, the delay time acquisition process S203 is executed for a subscriber line termination device connected to a newly connected subscriber line termination device or a transmission / reception function unit among the transmission / reception function units 111 to 11M whose processing delay time has changed. Or all subscriber line termination devices.

加入者線終端装置１２１に対する遅延時間取得処理Ｓ２０３の詳細な動作例を示したものが図３である。
遅延時間取得処理Ｓ２０３において、時刻設定フレーム生成処理Ｓ３０１にて集線機能部１０１の装置内時刻Ｔ１の情報を含んだ時刻設定フレーム３１１を生成した後、集線機能部１０１は加入者線終端装置１２１に対して時刻設定フレーム３１１を送信する。
時刻設定フレーム３１１を受信した加入者線終端装置１２１は、装置内時刻初期化処理Ｓ３０２により、加入者線終端装置１２１の装置内時刻を時刻設定フレーム３１１に含まれる集線機能部１０１の装置内時刻Ｔ１に設定する。
その後加入者線終端装置１２１は、時刻応答フレーム生成処理Ｓ３０３にて加入者線終端装置１２１内の装置内時刻Ｔ２の情報を含んだ時刻応答フレーム３１２を生成し、集線機能部１０１へと送信する。
集線機能部１０１では、遅延時間算出・保存処理Ｓ３０４により、時刻応答フレーム３１２の受信時刻Ｔ３と、受信した時刻応答フレーム３１２に含まれる加入者線終端装置１２１内の装置時刻Ｔ２の差分の１／２に相当する値を集線機能部１０１と加入者線終端装置１２１の間の遅延時間として保存する。 FIG. 3 shows a detailed operation example of the delay time acquisition process S203 for the subscriber line terminating device 121.
In the delay time acquisition process S203, the time setting frame generation process S301 generates the time setting frame 311 including the information of the in-device time T1 of the line concentration function unit 101, and then the line concentration function unit 101 sends the information to the subscriber line termination device 121. A time setting frame 311 is transmitted.
Upon receiving the time setting frame 311, the subscriber line terminating device 121 performs the apparatus time initialization processing S 302 to convert the apparatus time of the subscriber line terminating apparatus 121 into the apparatus time of the line concentrator 101 included in the time setting frame 311. Set to T1.
Thereafter, the subscriber line terminating device 121 generates a time response frame 312 including information on the in-device time T2 in the subscriber line terminating device 121 in the time response frame generating process S303, and transmits the time response frame 312 to the line concentration function unit 101. .
In the line concentrator 101, the delay time calculation / storing process S304 makes 1 / of the difference between the reception time T3 of the time response frame 312 and the device time T2 in the subscriber line termination device 121 included in the received time response frame 312. A value corresponding to 2 is stored as a delay time between the concentrating function unit 101 and the subscriber line terminating device 121.

送受信機能部１１１〜１１Ｍ内部のデータ信号の処理時間に変化があった際に、集線機能部１０１に対して通知する処理時間変更通知手順の例を図４に示す。処理時間変更通知手順では、送受信機能部におけるデータ信号の処理時間が変化したかどうかを判定し（Ｓ４０１）、変化があった場合に集線機能部１０１に対して処理時間変更通知を送信し、変更があった旨通知する（Ｓ４０２）。   FIG. 4 shows an example of a processing time change notification procedure for notifying the concentrator function unit 101 when there is a change in the data signal processing time inside the transmission / reception function units 111 to 11M. In the processing time change notification procedure, it is determined whether or not the processing time of the data signal in the transmission / reception function unit has changed (S401), and if there has been a change, a processing time change notification is transmitted to the line concentration function unit 101, and the change is made. Is notified (S402).

以上の手順により、集線機能部１０１は加入者線終端装置１２１〜１２Ｎとの間の遅延時間を取得し、また、送受信機能部１１１〜１１Ｍの処理時間変更時には送受信機能部１１１〜１１Ｍより受信した処理時間変更通知を契機に新たな遅延時間を取得する。   By the above procedure, the line concentrating function unit 101 acquires the delay time with the subscriber line terminating devices 121 to 12N, and received from the transmission / reception function units 111 to 11M when the processing time of the transmission / reception function units 111 to 11M is changed. A new delay time is acquired in response to the processing time change notification.

（実施形態２）
図５から図７を用いて、第二の実施形態を説明する。本実施形態は送受信機能部１１１〜１１Ｍ内部のデータ信号の処理時間が変化した際に、送受信機能部１１１〜１１Ｍから集線機能部１０１に対して送受信機能部１１１〜１１Ｍ内部における処理時間の変化量を送信し、集線機能部１０１にて集線機能部１０１と加入者線終端装置１２１〜１２Ｎとの間の遅延時間を補正する例である。 (Embodiment 2)
The second embodiment will be described with reference to FIGS. In this embodiment, when the processing time of the data signal inside the transmission / reception function units 111 to 11M changes, the amount of change in the processing time inside the transmission / reception function units 111 to 11M from the transmission / reception function units 111 to 11M to the line concentration function unit 101 Is transmitted, and the delay time between the concentrating function unit 101 and the subscriber line terminating devices 121 to 12N is corrected by the concentrating function unit 101.

本実施形態で前提とする受動光通信網は第一の実施形態と同じく図１に示される構成である。本実施形態に係る帯域割り当て方法は、処理時間変更量通知手順と遅延時間取得手順を順に実行し、遅延時間取得手順において、遅延時間補正手順を実行する。   The passive optical communication network assumed in this embodiment has the configuration shown in FIG. 1 as in the first embodiment. The bandwidth allocation method according to the present embodiment sequentially executes a processing time change amount notification procedure and a delay time acquisition procedure, and executes a delay time correction procedure in the delay time acquisition procedure.

処理時間変更量通知手順では、送受信機能部１１１〜１１Ｍが、当該送受信機能部におけるデータ信号の処理時間に変化が生じた際に処理時間の変化量を取得して処理時間の変化量を集線機能部１０１に対して通知する。遅延時間補正手順では、集線機能部１０１は、処理時間の変化量に応じて加入者線終端装置１２１〜１２Ｎと集線機能部１０１との間の遅延時間を補正する。   In the processing time change amount notification procedure, the transmission / reception function units 111 to 11M acquire the amount of change in processing time when a change occurs in the processing time of the data signal in the transmission / reception function unit and collect the amount of change in processing time. Notification to the unit 101. In the delay time correction procedure, the line concentrating function unit 101 corrects the delay time between the subscriber line terminating devices 121 to 12N and the line concentrating function unit 101 according to the amount of change in the processing time.

処理時間変更量通知手順における集線機能部１０１による遅延時間取得手順を、図５に示す。加入者線終端装置が新規に接続された場合（Ｓ２０１においてＹｅｓ）は、第一の実施形態と同様に遅延時間取得処理Ｓ２０３による遅延時間の取得が行われる。また、送受信機能部１１１〜１１Ｍ内部のデータ信号の処理時間に変化があった場合（Ｓ５０１においてＹｅｓ）には、遅延時間補正手順Ｓ５０２により集線機能部１０１内部に保存されている各加入者線終端装置との間の遅延時間の値を補正する。これにより、集線機能部１０１は、加入者線終端装置１２１〜１２Ｎと集線機能部１０１との間の遅延時間を取得することができる。   FIG. 5 shows a delay time acquisition procedure performed by the line concentration function unit 101 in the processing time change amount notification procedure. When the subscriber line termination device is newly connected (Yes in S201), the delay time is acquired by the delay time acquisition process S203 as in the first embodiment. Further, when there is a change in the data signal processing time in the transmission / reception function units 111 to 11M (Yes in S501), each subscriber line termination stored in the line concentration function unit 101 by the delay time correction procedure S502. Correct the value of the delay time with the device. Thereby, the line concentrating function unit 101 can acquire the delay time between the subscriber line terminating devices 121 to 12N and the line concentrating function unit 101.

遅延時間補正手順Ｓ５０２の詳細な動作例を図６に示す。遅延時間補正手順Ｓ５０２では、送受信機能部１１１〜１１Ｍより受信した処理時間変更量通知を参照し、処理時間変更量通知送信元の送受信機能部、および処理時間変更量Ｃを取得する（Ｓ６０１）。処理時間変更量通知送信元の送受信機能部の情報により遅延時間変更対象である加入者線終端装置を取得（Ｓ６０２）した後、集線機能部１０１内に保存された加入者線終端装置１２１〜１２Ｎの遅延時間のうち、遅延時間変更対象である加入者線終端装置の遅延時間に処理時間変更量Ｃを加算し、新たな遅延時間を保存する（Ｓ６０３〜Ｓ６０６）。   A detailed operation example of the delay time correction procedure S502 is shown in FIG. In the delay time correction procedure S502, the processing time change amount notification received from the transmission / reception function units 111 to 11M is referred to, and the transmission / reception function unit of the processing time change amount notification transmission source and the processing time change amount C are acquired (S601). After acquiring the subscriber line termination device whose delay time is to be changed based on the information of the transmission / reception function unit of the processing time change amount notification transmission source (S602), the subscriber line termination devices 121 to 12N stored in the line concentration function unit 101 Among the delay times, the processing time change amount C is added to the delay time of the subscriber line termination device that is the target of the delay time change, and a new delay time is stored (S603 to S606).

送受信機能部１１１〜１１Ｍ内部のデータ信号の処理時間に変化があった際に、集線機能部１０１に対して処理時間変化量Ｃを通知する処理時間変更量通知手順の動作例を図７に示す。処理時間変更量通知手順では、送受信機能部１１１〜１１Ｍにおけるデータ信号の処理時間が変化したかどうかを判定し（Ｓ４０１）、変化があった場合に変化前後の差分を計算して処理時間変更量Ｃとし（Ｓ７０１〜Ｓ７０３）、処理時間変更量Ｃを含む処理時間量変更通知を集線機能部１０１に対して送信する（Ｓ７０４〜Ｓ７０５）。   FIG. 7 shows an operation example of a processing time change amount notification procedure for notifying the concentrating function unit 101 of the processing time change amount C when there is a change in the data signal processing time inside the transmission / reception function units 111 to 11M. . In the processing time change amount notification procedure, it is determined whether or not the processing time of the data signal in the transmission / reception function units 111 to 11M has changed (S401), and when there is a change, the difference before and after the change is calculated to calculate the processing time change amount. C (S701 to S703), a processing time amount change notification including the processing time change amount C is transmitted to the line concentration function unit 101 (S704 to S705).

以上の手順により、集線機能部１０１は送受信機能部１１１〜１１Ｍの処理時間変更時に各加入者線終端装置との間の遅延時間を補正する。なお、本手順以降の集線機能部１０１による各加入者線終端装置への送信開始時間割り当ては補正後の遅延時間に基づいて行う。   With the above procedure, the line concentrating function unit 101 corrects the delay time with each subscriber line terminating device when the processing time of the transmission / reception function units 111 to 11M is changed. The transmission start time allocation to each subscriber line terminating device by the concentrating function unit 101 after this procedure is performed based on the corrected delay time.

（実施形態３）
図８から図１０を用いて、第三の実施形態を説明する。本実施形態は、送受信機能部１１１〜１１Ｍ内部のデータ信号の処理時間が変化した際に送受信機能部１１１〜１１Ｍ内部でのデータ保持時間を変更し、集線機能部１０１と加入者線終端装置１２１〜１２Ｎの間の遅延時間を一定に保つ例である。 (Embodiment 3)
A third embodiment will be described with reference to FIGS. In the present embodiment, when the processing time of the data signal in the transmission / reception function units 111 to 11M changes, the data holding time in the transmission / reception function units 111 to 11M is changed, and the line concentration function unit 101 and the subscriber line termination device 121 are changed. This is an example of keeping the delay time between ˜12N constant.

本実施形態で前提とする受動光通信網は第一の実施形態と同じく図１に示される構成である。本実施形態に係る帯域割り当て方法は、遅延時間取得手順と、処理時間調整手順と、を順に有する。   The passive optical communication network assumed in this embodiment has the configuration shown in FIG. 1 as in the first embodiment. The bandwidth allocation method according to the present embodiment includes a delay time acquisition procedure and a processing time adjustment procedure in this order.

集線機能部１０１による遅延時間取得処理は、図８に示す通り加入者線終端装置が新規に接続された場合に遅延時間取得処理Ｓ２０３による遅延時間の取得が行われる。   In the delay time acquisition process by the line concentrating function unit 101, the delay time is acquired by the delay time acquisition process S203 when a subscriber line terminating device is newly connected as shown in FIG.

送受信機能部１１１〜１１Ｍにおけるバッファ機能部（不図示）の動作を図９に示す。加入者線終端装置１２１〜１２Ｎから受信したデータ信号は、バッファ機能部（不図示）における格納時間Ｓの経過後（Ｓ９０１〜Ｓ９０２）に集線機能部１０１へと送信される（Ｓ９０３）。   The operation of the buffer function unit (not shown) in the transmission / reception function units 111 to 11M is shown in FIG. The data signals received from the subscriber line terminating devices 121 to 12N are transmitted to the concentrating function unit 101 after the storage time S in the buffer function unit (not shown) has elapsed (S901 to S902) (S903).

処理時間調整手順では、遅延時間取得手順により取得した遅延時間に基づき、各加入者線終端装置１２１〜１２Ｎからの信号が互いに衝突しないようバッファ機能部の保持時間を調整する。   In the processing time adjustment procedure, the holding time of the buffer function unit is adjusted based on the delay time acquired by the delay time acquisition procedure so that the signals from the subscriber line terminating devices 121 to 12N do not collide with each other.

送受信機能部１１１〜１１Ｍ内部のデータ信号の処理時間に変化があった際の動作例を図１０に示す。処理時間調整手順では、送受信機能部１１１〜１１Ｍにおけるデータ信号の処理時間が変化したかどうかを判定し（Ｓ４０１）、変化があった場合に変化後の処理時間Ｔｎｅｗ（Ｓ７０２）、および予め指定された送受信機能部１１１における遅延時間Ｐを取得し（Ｓ１００１）、バッファ格納時間Ｓ＝Ｐ−Ｔｎｅｗを計算する（Ｓ１００２）。そして、バッファ機能部（不図示）を新たな格納時間Ｓに変更する。 FIG. 10 shows an operation example when there is a change in the data signal processing time inside the transmission / reception function units 111 to 11M. The treatment time adjustment procedure, to determine whether the processing time of the data signal in transmitting and receiving function unit 111~11M has changed (S401), the processing time T new after the change if there is a change (S702), and pre-specified The obtained delay time P in the transmission / reception function unit 111 is acquired (S1001), and the buffer storage time S = PT new is calculated (S1002). Then, the buffer function unit (not shown) is changed to a new storage time S.

以上の手順により、バッファ格納時間Ｓの調整を各バッファ機能部（不図示）において行うことで、送受信機能部１１１〜１１Ｍは加入者線終端装置１２１〜１２Ｎからデータ信号を受信した際に、送受信機能部１１１〜１１Ｍ内部の遅延時間を一定に保つ。これにより、送受信機能部１１１〜１１Ｍ内部のデータ信号の処理時間に変化があった場合であっても、加入者線終端装置１２１〜１２Ｎからの信号が互いに衝突しないよう集線機能部１０１へと出力することができる。   Through the above procedure, the buffer storage time S is adjusted in each buffer function unit (not shown), so that the transmission / reception function units 111 to 11M receive and transmit data signals from the subscriber line terminating devices 121 to 12N. The delay time inside the function units 111 to 11M is kept constant. As a result, even if there is a change in the processing time of the data signals inside the transmission / reception function units 111 to 11M, the signals from the subscriber line terminating devices 121 to 12N are output to the line concentration function unit 101 so as not to collide with each other. can do.

以上説明したように、本発明を用いることにより、端局装置内の集線機能部と複数の送受信機能部とが接続され、さらに送受信機能部と複数の加入者線終端装置とが接続される構成であり、集線機能部が各加入者線終端装置のデータ送信開始時刻およびデータ送信量を制御する受動光通信網における加入者線終端装置から端局装置へのデータ送信において、端局装置内の送受信機能部における処理遅延時間が変化した場合であってもデータフレームの衝突やリンク切断なく通信を継続することができる。   As described above, by using the present invention, a concentrator function unit in a terminal device and a plurality of transmission / reception function units are connected, and a transmission / reception function unit and a plurality of subscriber line termination devices are connected. In the data transmission from the subscriber line terminating device to the terminal device in the passive optical communication network in which the line concentrator controls the data transmission start time and data transmission amount of each subscriber line terminating device, Even if the processing delay time in the transmission / reception function unit changes, communication can be continued without collision of data frames or link disconnection.

本発明は情報通信産業に適用することができる。   The present invention can be applied to the information communication industry.

１００：端局装置
１０１：集線機能部
１１１〜１１Ｍ：送受信機能部
１２１〜１２Ｎ：加入者線終端装置 100: Terminal station device 101: Concentration function units 111 to 11M: Transmission / reception function units 121 to 12N: Subscriber line termination device

Claims (4)

集線機能部及び複数の送受信機能部を持つ端局装置と前記端局装置の送受信機能部にそれぞれ複数の加入者線終端装置とが接続された受動光通信網における帯域割り当て方法であって、
加入者線終端装置と集線機能部との間の遅延時間を取得する遅延時間取得手順と、
前記遅延時間取得手順により取得した遅延時間に基づき、加入者線終端装置からの信号が互いに衝突しないよう加入者線終端装置ごとの送信開始時刻を算出する送信開始時刻算出手順と、
を有することを特徴とする帯域割り当て方法。 A bandwidth allocation method in a passive optical communication network in which a terminal station device having a concentrator and a plurality of transmission / reception function units and a plurality of subscriber line termination devices are connected to the transmission / reception function units of the terminal station device,
A delay time acquisition procedure for acquiring a delay time between the subscriber line terminator and the concentrator function unit;
Based on the delay time acquired by the delay time acquisition procedure, a transmission start time calculation procedure for calculating a transmission start time for each subscriber line termination device so that signals from the subscriber line termination devices do not collide with each other;
A bandwidth allocation method characterized by comprising: 送受信機能部が、データ信号の処理時間に変化が生じたことを検知して集線機能部に対して通知する処理時間変更通知手順をさらに有し、
前記処理時間変更通知手順を契機に前記遅延時間取得手順を実行する
ことを特徴とする請求項１に記載の帯域割り当て方法。 The transmission / reception function unit further includes a processing time change notification procedure for detecting that a change has occurred in the processing time of the data signal and notifying the concentration function unit,
Bandwidth allocation method according to claim 1, characterized in that executing the delay time acquisition procedure triggered by the said processing time change notification procedures. 前記遅延時間取得手順において、
送受信機能部における処理時間の変化量を集線機能部に対して通知し、
集線機能部が通知された変化量に応じて加入者線終端装置と集線機能部との間の遅延時間を補正する
ことを特徴とする請求項１又は２に記載の帯域割り当て方法。 In the delay time acquisition procedure,
Notifying the concentration function section of the amount of change in processing time in the transmission / reception function section,
The band allocation method according to claim 1 or 2 , wherein the delay time between the subscriber line terminating device and the concentrating function unit is corrected according to the change amount notified by the concentrating function unit. 集線機能部及び複数の送受信機能部を持つ端局装置と前記端局装置の送受信機能部にそれぞれ複数の加入者線終端装置とが接続された受動光通信網における端局装置であって、
前記集線機能部が、加入者線終端装置と集線機能部との間の遅延時間を取得し、取得した遅延時間に基づき、加入者線終端装置からの信号が互いに衝突しないよう加入者線終端装置ごとの送信開始時刻を算出する端局装置。 A terminal device in a passive optical communication network in which a terminal unit having a concentrating function unit and a plurality of transmission / reception function units and a plurality of subscriber line termination devices are respectively connected to the transmission / reception function units of the terminal station device,
The concentrator function unit acquires a delay time between the subscriber line terminator and the concentrator function unit, and the subscriber line terminator prevents the signals from the subscriber line terminators from colliding with each other based on the acquired delay time. A terminal device that calculates the transmission start time for each.
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