JP2001007747A - Method for selecting transmission path and device thereof - Google Patents
Method for selecting transmission path and device thereofInfo
- Publication number
- JP2001007747A JP2001007747A JP11178196A JP17819699A JP2001007747A JP 2001007747 A JP2001007747 A JP 2001007747A JP 11178196 A JP11178196 A JP 11178196A JP 17819699 A JP17819699 A JP 17819699A JP 2001007747 A JP2001007747 A JP 2001007747A
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- Japan
- Prior art keywords
- transmission path
- transmission
- path
- quality
- selecting
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、複数の伝送路の少
なくとも１つを通信路として選択する伝送路選択方法お
よび装置に係り、特に、各伝送路の実際の状態に基づい
て最適な伝送路を選択する伝送路選択方法および装置に
関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and an apparatus for selecting at least one of a plurality of transmission paths as a communication path, and more particularly to an optimum transmission path based on the actual state of each transmission path. The present invention relates to a transmission path selection method and apparatus for selecting a transmission path.
【０００２】[0002]
【従来の技術】伝送路の品質および信頼性を向上させる
ために、選択可能な複数の伝送路を予め敷設し、最適な
伝送路を選択的に用いて通信を行う経路選択システムが
知られている。これは、使用する周波数帯や伝送媒体
（光または電磁波）が異なれば、同一環境下でも伝送路
ごとに通信品質が異なることに着目したもので、例え
ば、２２ＧＨｚ帯の無線通信では、降雨により通信断絶
が生じる可能性があり、ＩＳＭ帯の無線通信では、第３
者の通信や電子レンジ等の妨害により通信断絶が生じる
可能性がある。したがって、降雨時には予めＩＳＭ帯で
の無線通信を選択し、妨害が予測される場合には、予め
２２ＧＨｚ帯での無線通信を選択すれば、最適と予測さ
れる伝送路での通信が可能になる。2. Description of the Related Art In order to improve the quality and reliability of a transmission line, there is known a path selection system in which a plurality of selectable transmission lines are previously laid and communication is performed by selectively using an optimum transmission line. I have. This focuses on the fact that if the frequency band or transmission medium (light or electromagnetic wave) used is different, the communication quality is different for each transmission path even under the same environment. There is a possibility that disconnection will occur.
There is a possibility that the communication may be interrupted due to the communication of the user or the obstruction of the microwave oven. Therefore, when it is raining, radio communication in the ISM band is selected in advance, and when interference is predicted, radio communication in the 22 GHz band is selected in advance to enable communication on the transmission path predicted to be optimal. .
【０００３】[0003]
【発明が解決しようとする課題】しかしながら、降雨時
であれば２２ＧＨｚ帯の無線通信が必ず断絶されるわけ
ではなく、その他の諸条件によっては、たとえ降雨時で
あっても２２ＧＨｚ帯の無線通信の方がＩＳＭ帯での無
線通信より伝送品質が優る場合がある。同様に、電子レ
ンジ等から発せられる電波による妨害が予測される環境
下であっても、実際には、ＩＳＭ帯での無線通信の方が
２２ＧＨｚ帯の無線通信より伝送品質が勝る場合があ
る。However, when it is raining, the 22 GHz band wireless communication is not necessarily cut off. Depending on other conditions, even when it is raining, the 22 GHz band wireless communication is not possible. In some cases, the transmission quality is better than the wireless communication in the ISM band. Similarly, even in an environment in which interference by radio waves emitted from a microwave oven or the like is expected, transmission quality of wireless communication in the ISM band may actually be higher than that of 22 GHz band.
【０００４】このように、各伝送路における伝送品質の
優劣は、必ずしも予測通りとはならない。しかしなが
ら、従来技術では伝送路の実際の品質を測定することな
く、経験則や物理法則に基づいて最適と予測される伝送
路を画一的に選択していたので、真に最適な伝送路を選
択することはできなかった。[0004] As described above, the superiority of the transmission quality in each transmission path is not always as expected. However, in the prior art, a transmission line that is predicted to be optimal based on empirical rules and physical laws is uniformly selected without measuring the actual quality of the transmission line. I couldn't choose.
【０００５】本発明の目的は、上記した従来技術の問題
点を解決し、複数の伝送路から通信路として最適な伝送
路を選択可能な伝送路選択方法および装置を提供するこ
とにある。An object of the present invention is to solve the above-mentioned problems of the prior art, and to provide a transmission path selection method and apparatus capable of selecting an optimum transmission path as a communication path from a plurality of transmission paths.
【０００６】[0006]
【課題を解決するための手段】上記した目的を達成する
ために、本発明は、複数の伝送路の少なくとも１つを通
信路として選択する伝送路選択装置において、複数の伝
送路の状態をそれぞれ監視する伝送路状態監視手段と、
所定時間分の監視結果を履歴情報として伝送路ごとに記
憶する伝送路履歴記憶手段と、前記履歴情報に基づい
て、各伝送路の品質を定量的に求める伝送路品質算出手
段と、前記各伝送路の品質に基づいて各伝送路を評価す
る伝送路評価手段と、通信路として使用中の伝送路の評
価が低いと、評価の高い他の伝送路を前記評価結果に基
づいて選択する経路選択手段と、通信路を、現在の伝送
路から前記選択された他の伝送路へ切り換える伝送路切
換手段とを具備したことを特徴とする。In order to achieve the above-mentioned object, the present invention provides a transmission path selecting apparatus for selecting at least one of a plurality of transmission paths as a communication path, wherein a state of each of the plurality of transmission paths is determined. Transmission path state monitoring means for monitoring;
Transmission path history storage means for storing the monitoring result for a predetermined time as history information for each transmission path; transmission path quality calculation means for quantitatively determining the quality of each transmission path based on the history information; Transmission path evaluation means for evaluating each transmission path based on the quality of the path, and path selection for selecting another transmission path having a high evaluation based on the evaluation result if the evaluation of the transmission path being used as the communication path is low. Means, and a transmission path switching means for switching a communication path from a current transmission path to the other selected transmission path.
【０００７】上記した特徴によれば、敷設された複数の
伝送路の品質がそれぞれ実測され、実測結果に基づいて
品質が高いと判定された伝送路が通信路として選択され
るので、真に品質の高い伝送路を用いた通信が可能にな
る。According to the above-mentioned feature, the quality of each of a plurality of installed transmission lines is actually measured, and the transmission line determined to have high quality based on the result of the actual measurement is selected as the communication line, so that the quality is truly improved. Communication using a transmission path with a high transmission rate is possible.
【０００８】[0008]
【発明の実施の形態】以下、図面を参照して本発明を詳
細に説明する。図１は、本発明の伝送路選択システムを
適用した通信機によるネットワーク構成を示した図であ
り、２つのネットワークＮ１，Ｎ２は、それぞれ通信機
１、２を介して相互接続され、各通信機１、２は複数の
無線および有線伝送路Ｌ１、Ｌ２、…Ｌｎの少なくとも
１つを利用して通信を行う。各伝送路Ｌ１〜Ｌｎには、
仕様（帯域幅、波長、出力等）が同一である複数の伝送
路が含まれても良いし、あるいは仕様が異なる複数種の
伝送路が含まれても良い。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail with reference to the drawings. FIG. 1 is a diagram showing a network configuration using communication devices to which a transmission path selection system according to the present invention is applied. Two networks N1 and N2 are interconnected via communication devices 1 and 2, respectively. Ln communicate with each other using at least one of a plurality of wireless and wired transmission paths L1, L2,... Ln. In each of the transmission lines L1 to Ln,
A plurality of transmission lines having the same specifications (bandwidth, wavelength, output, etc.) may be included, or a plurality of types of transmission lines having different specifications may be included.
【０００９】図２は、マスタとして機能する前記通信機
１の構成を示したブロック図である。インターフェース
２は、アンテナ３を介した無線通信用（伝送路Ｌ１，Ｌ
２）のインターフェースであり、インターフェース４
は、ケーブルＬｎを利用した有線通信用のインターフェ
ースである。FIG. 2 is a block diagram showing a configuration of the communication device 1 functioning as a master. The interface 2 is for wireless communication via the antenna 3 (transmission paths L1, L
Interface 2), Interface 4
Is an interface for wired communication using the cable Ln.
【００１０】伝送路状態監視手段１０１は、各無線およ
び有線伝送路Ｌ１，Ｌ２…Ｌｎの伝送状態を監視する。
具体的には、伝送路から送られるアラームの有無や種
類、あるいはリンクのアップ／ダウンに関する信号を監
視し、監視タイマ１０１ａの設定値に応じた所定時間前
から現在までの監視結果を、各伝送路ごとに履歴として
出力する。伝送路履歴記憶手段１０３は、前記伝送路ご
とに求められた監視結果の履歴を、伝送路ごとに区別し
て記憶する。The transmission line state monitoring means 101 monitors the transmission state of each of the wireless and wired transmission lines L1, L2,.
More specifically, it monitors the presence / absence and type of an alarm transmitted from the transmission path, or a signal related to link up / down, and transmits the monitoring result from a predetermined time before the present time to the present according to the set value of the monitoring timer 101a. Output as history for each road. The transmission line history storage unit 103 stores the history of monitoring results obtained for each transmission line separately for each transmission line.
【００１１】伝送路品質算出手段１０４は、前記所定時
間分の監視結果（履歴）に基づいて各伝送路の品質を定
量的に求めるべく、例えば各伝送路の伝送路品質値Ｑ
（帯域幅、遅延時間、揺らぎ、誤り率等）を、前記監視
結果の履歴に基づいて求める。なお、前記伝送路状態監
視手段１０１が伝送路から受け取るアラームの種類等は
各伝送路に固有であり、それぞれのアラームが全て同一
の状態を表している訳ではない。The transmission path quality calculating means 104 calculates, for example, the transmission path quality value Q of each transmission path in order to quantitatively determine the quality of each transmission path based on the monitoring result (history) for the predetermined time.
(Bandwidth, delay time, fluctuation, error rate, etc.) are obtained based on the history of the monitoring results. The type of alarm received by the transmission path status monitoring means 101 from the transmission path is specific to each transmission path, and not all alarms indicate the same state.
【００１２】すなわち、伝送路状態監視手段１０１によ
る監視結果履歴と伝送路品質値Ｑとの対応関係は伝送路
ごとに固有である。したがって本実施形態では、品質算
出データベース（ＤＢ）１０２に、監視結果履歴と伝送
路品質値Ｑとの対応関係を伝送路ごとに予め登録し、伝
送路品質算出手段１０４は、前記伝送路状態監視手段１
０１から通知された監視結果履歴と前記品質算出データ
ベース１０２に格納されている前記対応関係とに基づい
て各伝送路の伝送路品質値Ｑを求める。That is, the correspondence between the monitoring result history by the transmission path state monitoring means 101 and the transmission path quality value Q is unique for each transmission path. Therefore, in the present embodiment, the correspondence between the monitoring result history and the transmission path quality value Q is registered in advance in the quality calculation database (DB) 102 for each transmission path, and the transmission path quality calculation means 104 Means 1
The transmission line quality value Q of each transmission line is obtained based on the monitoring result history notified from No. 01 and the correspondence stored in the quality calculation database 102.
【００１３】基準品質値データベース１０８には、各伝
送路Ｌ１，Ｌ２…Ｌｎの基準品質値Ｑref(L1) ，Ｑref
(L2) …Ｑref(Ln) がそれぞれ格納されている。伝送路
評価手段１０５は、前記求められた各伝送路の伝送路品
質値Ｑを各基準品質値Ｑref と比較する。たとえば、伝
送路Ｌ１の伝送路品質値Ｑ(L1)は基準品質値Ｑref(L1)
と比較し、伝送路Ｌ２の伝送路品質値Ｑ(L2)は基準品質
値Ｑref(L2) と比較する。比較結果は各伝送路の評価結
果として経路選択手段１０６へ提供される。In the reference quality value database 108, reference quality values Qref (L1), Qref of the respective transmission lines L1, L2,.
(L2)... Qref (Ln) are stored. The transmission path evaluation means 105 compares the obtained transmission path quality value Q of each transmission path with each reference quality value Qref. For example, the transmission line quality value Q (L1) of the transmission line L1 is equal to the reference quality value Qref (L1).
, The transmission line quality value Q (L2) of the transmission line L2 is compared with the reference quality value Qref (L2). The comparison result is provided to the route selection unit 106 as an evaluation result of each transmission line.
【００１４】優先度情報記憶手段１０７には、伝送路を
選択する際の参考となる優先度情報が格納されている。
経路選択手段１０６は、前記伝送路評価手段１０５によ
る評価結果および前記優先度情報記憶手段１０７に格納
されている優先度情報に基づいて伝送路を選択する。伝
送路切換手段１００は、前記選択された伝送路が通信路
となるように接点を切り換える。The priority information storage means 107 stores priority information which is used as a reference when selecting a transmission path.
The route selection means 106 selects a transmission path based on the evaluation result by the transmission path evaluation means 105 and the priority information stored in the priority information storage means 107. The transmission path switching means 100 switches the contacts so that the selected transmission path becomes a communication path.
【００１５】図３は、上記した伝送路選択システムにお
ける通信機１の動作を示したフローチャートである。FIG. 3 is a flowchart showing the operation of the communication device 1 in the above-described transmission path selection system.
【００１６】ステップＳ１０では、各無線および有線伝
送路Ｌ１，Ｌ２…Ｌｎの伝送状態が伝送路状態監視手段
１０１により監視され、所定時間前から現在までの監視
結果が各伝送路ごとに出力される。前記所定時間分の監
視結果（履歴）は、ステップＳ１１において、それぞれ
の伝送路の履歴情報として伝送路履歴記憶手段１０３に
記憶される。In step S10, the transmission state of each of the wireless and wired transmission lines L1, L2,... Ln is monitored by the transmission line state monitoring means 101, and a monitoring result from a predetermined time before to the present is output for each transmission line. . The monitoring result (history) for the predetermined time is stored in the transmission path history storage unit 103 as history information of each transmission path in step S11.
【００１７】ステップＳ１２では、前記伝送路品質算出
手段１０４が前記所定時間前から現在までの履歴情報に
基づいて、現在使用中の伝送路（本実施形態では、Ｌ
２）を含む各伝送路の伝送路品質値Ｑ（帯域幅、遅延時
間、揺らぎ、誤り率等）を、前記品質算出データベース
１０２を参照しながら算出する。ステップＳ１３では、
前記伝送路評価手段１０５が、前記算出された各伝送路
の伝送路品質値Ｑ(L1)、Ｑ(L2)…Ｑ(Ln)を、前記基準品
質値データベース１０８に格納されている各基準品質値
Ｑref(L1) ，Ｑref(L2) …Ｑref(Ln) とそれぞれ比較す
る。In step S12, the transmission path quality calculating means 104 uses the transmission path currently in use (in this embodiment, L
The transmission line quality value Q (bandwidth, delay time, fluctuation, error rate, etc.) of each transmission line including 2) is calculated with reference to the quality calculation database 102. In step S13,
The transmission path evaluation means 105 stores the calculated transmission path quality values Q (L1), Q (L2)... Q (Ln) of each transmission path in each of the reference quality values stored in the reference quality value database 108. The values Qref (L1), Qref (L2)... Qref (Ln) are compared.
【００１８】ステップＳ１４では、通信路として現在使
用中の伝送路Ｌ２の品質値Ｑ(L2)が基準品質値Ｑref(L
2) の規格内であるか否かが判定され、規格内であれ
ば、ステップＳ１８において所定時間だけ待機した後、
伝送路を切換えることなくステップＳ１０へ戻り、上記
した各処理を繰り返す。In step S14, the quality value Q (L2) of the transmission line L2 currently used as the communication channel is changed to the reference quality value Qref (L
2) It is determined whether or not it is within the standard. If it is within the standard, after waiting for a predetermined time in step S18,
The process returns to step S10 without switching the transmission path, and repeats the above-described processes.
【００１９】また、前記ステップＳ１４において、現在
使用中の伝送路Ｌ２の品質値Ｑ(L2)が規格外であると判
定されると、ステップＳ１５では、伝送路として使用可
能状態にあり、かつ品質値Ｑが規格内である他の伝送路
が、前記伝送路評価手段１０５により通信路候補として
全て抽出される。If it is determined in step S14 that the quality value Q (L2) of the currently used transmission line L2 is out of the standard, in step S15, the transmission line L2 is in a usable state and the quality The other transmission paths whose values Q are within the standard are all extracted by the transmission path evaluation means 105 as communication path candidates.
【００２０】ステップＳ１６では、経路選択手段１０６
が、優先度情報記憶手段１０７に記憶された優先度情報
に基づいて、前記複数の通信路候補の中から最適な伝送
路を新たな通信路として選択する。In step S16, the route selecting means 106
Selects an optimum transmission path from among the plurality of communication path candidates as a new communication path based on the priority information stored in the priority information storage means 107.
【００２１】すなわち、前記優先度情報記憶手段１０７
には、例えば各伝送路の伝送速度が予め登録されてお
り、伝送速度の早い伝送路ほど優先順位が高く設定され
ている。経路選択手段１０６は、例えば伝送路Ｌ１、Ｌ
２が通信路候補として選択されており、両者の品質値Ｑ
に大差があれば、優先順位にかかわらず品質値Ｑの高い
方の伝送路を選択するが、両者の品質値Ｑに大差がなけ
れば、優先順位を優先させて伝送速度のより早い伝送路
を選択する。That is, the priority information storage means 107
For example, the transmission speed of each transmission line is registered in advance, and the higher the transmission speed, the higher the priority is set. The route selection unit 106 includes, for example, the transmission lines L1 and L
2 is selected as a channel candidate, and the quality values Q
If there is a great difference between the two, the transmission path with the higher quality value Q is selected irrespective of the priority. However, if there is no large difference between the two, the priority is given priority and the transmission path with a higher transmission speed is selected. select.
【００２２】ステップＳ１７では、前記決定された伝送
路が通信路となるように、伝送路切換手段１００が切り
換えられる。In step S17, the transmission path switching means 100 is switched so that the determined transmission path becomes a communication path.
【００２３】上記したように、本実施形態によれば、複
数の伝送路の状態が監視され、現在使用中の伝送路品質
が劣化すると、伝送路品質の優れた他の伝送路が選択さ
れて経路が切り換えられるので、常に最適な伝送路を使
用した通信が可能になる。As described above, according to the present embodiment, the state of a plurality of transmission paths is monitored, and if the quality of the currently used transmission path deteriorates, another transmission path having excellent transmission path quality is selected. Since the path is switched, communication using the optimal transmission path is always possible.
【００２４】また、本実施形態によれば、伝送路品質の
みならず、予め設定された各伝送路の優先度も考慮して
伝送路が選択されるので、総合的に見て最適な伝送路を
選択することができる。Further, according to the present embodiment, since the transmission path is selected in consideration of not only the transmission path quality but also the priority of each transmission path set in advance, the optimal transmission path as a whole is selected. Can be selected.
【００２５】なお、本発明は上記したようなマスタ／ス
レーブの１対１の接続体系のみならず、例えば図４に示
した通信機ｎのように、マスタおよびスレーブの双方と
して機能する場合には、自身がマスタとして機能する通
信機（ｎ＋１）との伝送路選択にも同様に適用すること
ができる。The present invention is not limited to the above-described one-to-one master / slave connection system. For example, when the communication device n functions as both a master and a slave as in the communication device n shown in FIG. The present invention can be similarly applied to the selection of a transmission path with the communication device (n + 1) which functions as a master.
【００２６】さらに、上記した実施形態では、敷設され
た複数の伝送路の中の１つを利用して通信を行う場合を
例にして説明したが、本発明はこれのみに限定されるも
のではなく、Ｍ個の伝送路のうちのｍ（＜Ｍ）個の伝送
路を同時に使用する通信にも同様に適用することができ
る。例えば、３つの伝送路を同時に使用して通信を行っ
ている最中に、いずれかまたは全ての伝送路の品質が基
準品質値Ｑref を下回った場合には、下回った全ての伝
送路または一部のみを他の伝送路と切換えて使用するこ
とができる。Further, in the above-described embodiment, the case where communication is performed using one of a plurality of laid transmission lines has been described as an example, but the present invention is not limited to this. Instead, the present invention can be similarly applied to communication in which m (<M) transmission paths of the M transmission paths are simultaneously used. For example, if the quality of any or all of the transmission paths falls below the reference quality value Qref during simultaneous communication using three transmission paths, all or some of the transmission paths that have fallen below the reference quality value Qref. Only the other transmission path can be used by switching.
【００２７】[0027]
【発明の効果】本発明によれば、以下のような効果が達
成される。 (1) 敷設された複数の伝送路の品質がそれぞれ実測さ
れ、実測結果に基づいて品質が高いと判定された伝送路
が通信路として選択されるので、真に品質の高い伝送路
を用いた通信が可能になる。 (2) 伝送路品質のみならず、予め設定された各伝送路の
優先度も考慮して伝送路が選択されるので、総合的に見
て最適な伝送路を選択することができる。According to the present invention, the following effects are achieved. (1) The quality of a plurality of installed transmission lines is actually measured, and a transmission line determined to be high quality based on the actual measurement result is selected as a communication line, so a truly high quality transmission line was used. Communication becomes possible. (2) Since the transmission path is selected in consideration of not only the transmission path quality but also the priority of each transmission path set in advance, it is possible to select an optimal transmission path as a whole.
【図１】本発明の伝送路選択システムを適用した通信機
によるネットワーク構成を示した図である。FIG. 1 is a diagram showing a network configuration of a communication device to which a transmission path selection system according to the present invention is applied.
【図２】通信機１の構成を示したブロック図である。FIG. 2 is a block diagram showing a configuration of the communication device 1.
【図３】通信機１による伝送路選択方法を示したフロー
チャートである。FIG. 3 is a flowchart showing a transmission path selection method by the communication device 1.
【図４】本発明の他の実施形態のシステム構成図であ
る。FIG. 4 is a system configuration diagram of another embodiment of the present invention.
通信機１、２…，インターフェース２…，アンテナ３
…，１００…伝送路切換手段，１０１…伝送路状態監視
手段，１０２…品質算出データベース，１０３…伝送路
履歴記憶手段，１０４…伝送路品質算出手段，１０５…
伝送路評価手段，１０６…経路選択手段，１０７…優先
度情報記憶手段，１０８…基準品質値データベースCommunication devices 1, 2, ..., interface 2, ..., antenna 3
..., 100 ... transmission line switching means, 101 ... transmission line state monitoring means, 102 ... quality calculation database, 103 ... transmission line history storage means, 104 ... transmission line quality calculation means, 105 ...
Transmission path evaluation means, 106: path selection means, 107: priority information storage means, 108: reference quality value database
───────────────────────────────────────────────────── フロントページの続き Ｆターム(参考） 5K021 BB02 CC01 CC03 CC11 CC16 DD01 EE00 FF01 GG03 5K030 GA14 JA10 JL00 KA06 LE05 MA04 MB04 MD02 5K059 AA02 BB01 BB08 CC01 CC02 CC03 CC06 CC09 DD02 DD05 DD10 DD24 DD26 DD41 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 5K021 BB02 CC01 CC03 CC11 CC16 DD01 EE00 FF01 GG03 5K030 GA14 JA10 JL00 KA06 LE05 MA04 MB04 MD02 5K059 AA02 BB01 BB08 CC01 CC02 CC03 CC06 CC09 DD02 DD05 DD10 DD24 DD26 DD41
Claims (4)
として選択する伝送路選択方法において、 複数の伝送路の状態をそれぞれ監視し、 前記監視結果に基づいて各伝送路の状態を判定し、 通信路として使用中の伝送路の状態が劣化したと判定さ
れると、状態の優れた他の伝送路を選択し、 通信路を、現在の伝送路から前記選択した他の伝送路へ
切り換えることを特徴とする伝送路選択方法。1. A transmission path selecting method for selecting at least one of a plurality of transmission paths as a communication path, wherein a state of each of the plurality of transmission paths is monitored, and a state of each transmission path is determined based on the monitoring result. If it is determined that the state of the transmission path being used as the communication path has deteriorated, another transmission path with an excellent state is selected, and the communication path is switched from the current transmission path to the selected other transmission path. A method for selecting a transmission path, comprising:
間分を履歴として記憶され、前記使用中の伝送路の状態
判定および前記状態の優れた他の伝送路の選択は、前記
履歴に基づいて行われることを特徴とする請求項１に記
載の伝送路選択方法。2. The monitoring result of each of the transmission paths is stored as a history for a predetermined time, and the determination of the state of the transmission path in use and the selection of another transmission path having an excellent state are stored in the history. The transmission path selection method according to claim 1, wherein the transmission path selection is performed on the basis of:
として選択する伝送路選択装置において、 複数の伝送路の状態をそれぞれ監視する伝送路状態監視
手段と、 所定時間分の監視結果を履歴情報として伝送路ごとに記
憶する伝送路履歴記憶手段と、 前記履歴情報に基づいて、各伝送路の品質を定量的に求
める伝送路品質算出手段と、 前記各伝送路の品質に基づいて各伝送路を評価する伝送
路評価手段と、 通信路として使用中の伝送路の評価が低いと、評価の高
い他の伝送路を前記評価結果に基づいて選択する経路選
択手段と、 通信路を、現在の伝送路から前記選択された他の伝送路
へ切り換える伝送路切換手段とを具備したことを特徴と
する伝送路選択装置。3. A transmission path selection device for selecting at least one of a plurality of transmission paths as a communication path, a transmission path state monitoring means for monitoring a state of each of the plurality of transmission paths, and a history of monitoring results for a predetermined time. Transmission path history storage means for storing information for each transmission path; transmission path quality calculation means for quantitatively determining the quality of each transmission path based on the history information; and each transmission based on the quality of each transmission path. Transmission path evaluation means for evaluating a path; path selection means for selecting another transmission path having a high evaluation based on the evaluation result when the evaluation of a transmission path being used as a communication path is low; Transmission line switching means for switching from one transmission line to the other selected transmission line.
記憶した優先度情報記憶手段をさらに具備し、 前記経路選択手段は、前記評価結果および前記優先度に
基づいて他の伝送路を選択することを特徴とする請求項
３に記載の伝送路選択装置。4. The apparatus further comprises priority information storage means for storing a priority when selecting the other transmission path, wherein the path selection means is configured to transmit the other transmission path based on the evaluation result and the priority. 4. The transmission path selection device according to claim 3, wherein
Priority Applications (1)
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|---|---|---|---|
| JP11178196A JP2001007747A (en) | 1999-06-24 | 1999-06-24 | Method for selecting transmission path and device thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11178196A JP2001007747A (en) | 1999-06-24 | 1999-06-24 | Method for selecting transmission path and device thereof |
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| Publication Number | Publication Date |
|---|---|
| JP2001007747A true JP2001007747A (en) | 2001-01-12 |
Family
ID=16044274
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP11178196A Pending JP2001007747A (en) | 1999-06-24 | 1999-06-24 | Method for selecting transmission path and device thereof |
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| Country | Link |
|---|---|
| JP (1) | JP2001007747A (en) |
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