JP3911529B2 - ISDN communication system and communication method - Google Patents

ISDN communication system and communication method Download PDF

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Publication number
JP3911529B2
JP3911529B2 JP07794199A JP7794199A JP3911529B2 JP 3911529 B2 JP3911529 B2 JP 3911529B2 JP 07794199 A JP07794199 A JP 07794199A JP 7794199 A JP7794199 A JP 7794199A JP 3911529 B2 JP3911529 B2 JP 3911529B2
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center
terminal
isdn
communication
telephone number
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JP2000278435A (en
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賢知 小林
長武 宇野
久太 斎藤
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NTT Electronics Corp
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NTT Electronics Corp
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Description

【０００１】
【発明の属する技術分野】
本発明は、ガス、水道、電気などの自動検針システムに用いられるＩＳＤＮ通信システムに関わり、特に、複数回線を有するセンタと端末との間で通信を行うＩＳＤＮ通信システムに関するものである。
【０００２】
【従来の技術】
昨今、ＩＳＤＮ公衆回線を用いたガスの自動検針において、ユーザ・ユーザ情報通知サービスを用いて通信を行うことがある。このようなユーザ・ユーザ情報通知サービスを用いたＩＳＤＮ通信システムにおいて、端末がセンタ側を呼び出す場合、センタ側はＩＳＤＮ公衆回線を介して１つの回線にして、端末側にセンタの電話番号を覚えさせ、端末はその電話番号でユーザ・ユーザ情報（ＵＵＩ）通信を行う。
【０００３】
また、センタが端末側に別々のセンタの電話番号を覚えさせ、センタ側が複数の回線で待機する方法もある。更に、複数の回線を有するセンタを代表契約し、端末側が代表電話番号でセンタに発呼する方法もある。
【０００４】
【発明が解決しようとする課題】
しかしながら、このようなユーザ・ユーザ情報通信サービスを用いたＩＳＤＮ通信システムにおいて、複数の端末側から同時に端末発呼すると、センタ側は「話中」になり通信できないという問題が生じる。センタ側が複数の回線で待機する方法でも、同様の問題が生じる。
【０００５】
また、センタを代表契約する方法では、一つのＵＵＩを受信するたびにＩＳＤＮ公衆回線の交換機で回線選択が行われるので、最初のＵＵＩを着信したセンタ端末に２回目のＵＵＩでも着信できるとは限らない。すなわち、連続する同一端末側からの通信を、最初に着信したセンタ端末が継続して着信できない。
【０００６】
本発明は、このような問題に鑑みてなされたもので、その目的とするところは、ＵＵＩ（ユーザ・ユーザ情報）通信を利用する複数子機を有するセンタで、回線の効率を維持しつつ、特定のセンタ子機と継続した端末発呼受信を可能にするＩＳＤＮ通信システムを提供することにある。
【０００７】
【課題を解決するための手段】
前述した目的を達成するために第1の発明は、センタ側は、代表回線とそれ以外の少なくとも２回線と、それに対応する親機と、少なくとも２台の子機を有し、前記センタ側と端末との間でＩＳＤＮ公衆回線を介して通信を行うＩＳＤＮ通信システムにおいて、端末が前記センタ側の親機を呼び出すと、センタ側は、親機以外のいずれかの子機に着信させ、着信した子機に対応する回線の電話番号をユーザ・ユーザ情報か発信者電話番号通知に付けて前記端末に応答し、前記端末は以後、当該呼び出しによる一連の通信が完了するまでの間、この子機に対応する電話番号でパケット通信を行うことを特徴とするＩＳＤＮ通信システムである。
【０００８】
また、第２の発明は、センタ側は、代表回線とそれ以外の少なくとも２回線と、それに対応する親機と、少なくとも２台の子機を有し、前記センタ側と端末との間でＩＳＤＮ公衆回線を介して通信を行うＩＳＤＮ通信システムにおいて、端末が前記センタ側の親機を呼び出すと、センタ側は、親機以外のいずれかの子機に着信させ、着信した子機に対応する回線の電話番号をユーザ・ユーザ情報か発信者電話番号通知に付けて前記端末に応答し、前記端末は以後、当該呼び出しによる一連の通信が完了するまでの間、この子機に対応する電話番号でパケット通信を行うことを特徴とする通信方法である。
【０００９】
【発明の実施の形態】
以下、図面に基づいて本発明の実施の形態を詳細に説明する。図１は、本発明の１実施の形態に係るＩＳＤＮ通信システム１の概略構成図である。ＩＳＤＮ通信システム１は、センタ３−１、３−２、３−３、ＰＢＸ交換機４、代表選択装置５、ＩＳＤＮ公衆回線６、ＤＳＵ（宅内データ回線終端装置）８−１、８−２、…、Ｉ−ＮＣＵ（網制御装置）９−１、９−２、…、メータ１１−１、１１−２、…等から構成される。７−１，７−２、…は需要家を示す。
【００１０】
センタ３は、代表契約をして代表となるセンタ親機３−１とセンタ子機３−２、３−３を有する。ＰＢＸ交換機４はセンタ側の交換機であり、代表選択装置５を含む。代表選択装置５は、端末側からの受信電文をセンタ親機３−１以外のセンタ子機３−２，３−３に振り分け、着信させる。センタ３側とＮＣＵ９−１、９−２、…との間はＩＳＤＮ公衆回線６で接続される。メータ１１−１、１１−２、…は、ガスのメータである。尚、ガスメータだけでなく、電気、水道等のメータやセキュリティその他情報端末に対しても本発明を応用することができる。尚、代表選択装置５は、ＩＳＤＮ公衆回線６の交換機の一部であってもよい。
【００１１】
本実施の形態では、端末側から複数回線を有するセンタ３を呼び出す場合、最初に、端末側のＮＣＵ９−１はセンタ３の代表電話番号に向けて呼び出し、センタ３側の代表選択装置５は、センタ親機３−１以外のセンタ子機３−２またはセンタ子機３−３に着信させる。着信したセンタ子機３−２またはセンタ子機３−３は、センタ子機の電話番号を設定した発電話番号情報をＵＵＩ（ユーザ・ユーザ情報）に付けて端末側に応答する。以後、端末側は、この発電話番号に向けてＵＵＩ（ユーザ・ユーザ情報）通信を行う。
【００１２】
図３は、センタ３とＮＣＵ９間で通信されるＳＥＴＵＰメッセージ２１のフォーマット図である。ヘッダ２３には、ヘッダ情報が設定される。ＳＥＴＵＰ２５には、ＳＥＴＵＰ（呼設定）が設定される。ＵＵＩ（ユーザ・ユーザ情報）２７には起動電文、データ要求、または終了要求等の情報とともに発電話番号情報２９を設定される。
【００１３】
このような本実施の形態の端末側から複数回線を有するセンタ３を呼び出す場合の通信シーケンスを詳しく説明する。図２は、端末側から複数回線を有するセンタ３を呼び出す場合の通信シーケンスを示す。図２に示すように、まず、メータ１１−１から代表電話番号Ａで端末発呼初呼を行う。すなわち、メータ１１−１は起動電文をＮＣＵ９−１に送信する（ステップ２００）。ＮＣＵ９−１は、代表電話番号Ａに向けてＳＥＴＵＰメッセージ２１のＵＵＩ（ユーザ・ユーザ情報）２７に端末発呼初呼を付加して、ＳＥＴＵＰメッセージ２１をＩＳＤＮ公衆回線６を介してセンタ３側に送信する（ステップ２０１）。代表選択装置５は、受信した端末発呼初呼をセンタ３の子回線に振り分け、例えば、センタ子機３−２に着信させる。（ステップ２０２）。
【００１４】
センタ子機３−２が端末発呼初呼を受け取ると、応答としてセンタ３−２が要求電文を送信する場合に、ＳＥＴＵＰメッセージ２１（図３）のＵＵＩ（ユーザ・ユーザ情報）２７に要求電文とともにセンタ子機３−２の電話番号Ｂを発電話番号情報２９に付加してから、ＳＥＴＵＰメッセージ２１をＩＳＤＮ公衆回線６を介してＮＣＵ９−１に送る（ステップ２１０、ステップ２１１）。ＮＣＵ９−１は、メータ１１に要求電文を送信する（ステップ２１２）。
【００１５】
次に、メータ１１が２回目のＵＵＩ（ユーザ・ユーザ情報）を送信する場合、メータ１１−１は、センタ３側に端末発呼第２呼を行う（ステップ２２０）。ＮＣＵ９−１は、先に受信した発電話番号情報２９のセンタ子機３−２の電話番号Ｂに向けてＳＥＴＵＰメッセージ２１のＵＵＩ（ユーザ・ユーザ情報）２７に応答電文を設定してから、ＳＥＴＵＰメッセージ２１をＩＳＤＮ公衆回線６を介してセンタ子機３−２に送信する（ステップ２２１）。代表選択装置５は、受信した応答電文をセンタ子機３−２に着信させる（ステップ２２２）。以後、ＮＣＵ９−１は、一連の通信の間はこの発電話番号情報の電話番号Ｂに向けてＵＵＩ（ユーザ・ユーザ情報）を送信する。
【００１６】
次に、このようなＵＵＩ（ユーザ・ユーザ情報）通信が終了し、再び、端末側が次の端末発呼初呼を行う場合には、代表電話番号Ａでセンタ３側を呼び出し（ステップ３００、ステップ３０１）、代表選択装置５は、受信した起動電文をセンタ子機３−２またはセンタ子機３−３に振り分けて着信させる（ステップ３０２）。
【００１７】
このように本実施の形態によれば、端末側から代表電話番号でセンタ３側を呼び出すと、センタ３側の代表選択装置５はセンタ親機３−１以外のセンタ子機３−２またはセンタ子機３−３に振り分けて着信させ、センタ子機の電話番号を設定した発電話番号情報をＵＵＩ（ユーザ・ユーザ情報）パケットに付けて端末側に応答し、以後、端末側は、この発電話番号に向けてＵＵＩ（ユーザ・ユーザ情報）通信を行う。これにより、端末側は、２回目以降のパケット通信も同一のセンタ子機に送信できる。
【００１８】
尚、本実施の形態では、センタ子機の電話番号を設定した発電話番号情報をＵＵＩ（ユーザ・ユーザ情報）に付けて応答する方法であるが、センタ側が、公衆網のサービスである発信者電話番号通知を用いてセンタ子機の電話番号を送信する方法も可能である。
更に、代表選択装置５は、ＰＢＸ交換機４の中に設けたが、ＩＳＤＮ公衆回線６の公衆交換機（図示せず）が代表選択装置５として機能してもよい。
【００１９】
【発明の効果】
以上、詳細に説明したように本発明によれば、ＵＵＩ（ユーザ・ユーザ情報）通信を利用する複数子機を有するセンタで、回線の効率を維持しつつ、特定のセンタ子機と継続した端末発呼受信を可能にするＩＳＤＮ通信システムを提供することができる。
【図面の簡単な説明】
【図１】本発明の実施の形態に係るＩＳＤＮ通信システム１の概略構成図
【図２】端末側から複数回線を有するセンタ３を呼び出す場合の通信シーケンスを示す図
【図３】ＳＥＴＵＰメッセージ２１のフォーマット図
【符号の説明】
１………ＩＳＤＮ通信システム
３………センタ
４………ＰＢＸ交換機
５………代表選択装置
６………ＩＳＤＮ公衆回線
７………需要家
８………ＤＳＵ
９………ＮＣＵ
１１………ガスメータ
２１………ＳＥＴＵＰメッセージ
２３………ヘッダ
２５………ＳＥＴＵＰ
２７………ＵＵＩ[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an ISDN communication system used for automatic meter reading systems such as gas, water, and electricity, and more particularly, to an ISDN communication system that performs communication between a center having a plurality of lines and a terminal.
[0002]
[Prior art]
Recently, in automatic gas meter reading using an ISDN public line, communication is sometimes performed using a user / user information notification service. In such an ISDN communication system using the user / user information notification service, when the terminal calls the center side, the center side makes one line through the ISDN public line and causes the terminal side to remember the telephone number of the center. The terminal performs user / user information (UUI) communication using the telephone number.
[0003]
There is also a method in which the center remembers the telephone numbers of different centers on the terminal side, and the center side stands by on a plurality of lines. Further, there is a method in which a center contract with a center having a plurality of lines is made and the terminal side makes a call to the center with a representative telephone number.
[0004]
[Problems to be solved by the invention]
However, in an ISDN communication system using such a user / user information communication service, if a terminal makes a call simultaneously from a plurality of terminals, there is a problem that the center becomes “busy” and cannot communicate. A similar problem occurs even when the center side waits on a plurality of lines.
[0005]
Also, in the method of making a representative contract with the center, line selection is performed by the ISDN public line exchange every time one UUI is received, so it is not always possible to receive a call to the center terminal that received the first UUI even with the second UUI. Absent. That is, the center terminal that has received the first communication cannot continuously receive communications from the same terminal side.
[0006]
The present invention has been made in view of such problems, and the object of the present invention is a center having a plurality of slave units using UUI (user / user information) communication while maintaining the efficiency of the line. It is an object of the present invention to provide an ISDN communication system that enables continuous call reception with a specific center slave unit.
[0007]
[Means for Solving the Problems]
In order to achieve the above-mentioned object, the first invention is such that the center side has a representative line, at least two other lines, a base unit corresponding thereto, and at least two slave units, In an ISDN communication system that communicates with a terminal via an ISDN public line, when the terminal calls the center-side base unit, the center side makes an incoming call to any of the handset units other than the base unit. The telephone number of the line corresponding to is attached to the user / user information or the caller telephone number notice, and the terminal responds to the terminal. The terminal then supports this slave unit until a series of communications by the call is completed. It is an ISDN communication system characterized in that packet communication is performed using a telephone number to be transmitted.
[0008]
According to a second aspect of the present invention, the center side has a representative line, at least two other lines, a base unit corresponding to the representative line, and at least two slave units, and the ISDN is connected between the center side and the terminal. In an ISDN communication system that performs communication via a public line, when a terminal calls a base unit on the center side, the center side makes an incoming call to one of the slave units other than the base unit, and a telephone line corresponding to the received slave unit The terminal responds to the terminal with a user / user information or a caller telephone number notification, and the terminal thereafter performs packet communication with the telephone number corresponding to the slave unit until a series of communications by the call is completed. A communication method characterized by performing
[0009]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. FIG. 1 is a schematic configuration diagram of an ISDN communication system 1 according to an embodiment of the present invention. The ISDN communication system 1 includes a center 3-1, 3-2, 3-3, a PBX switch 4, a representative selection device 5, an ISDN public line 6, a DSU (in-house data line termination unit) 8-1, 8-2,. , I-NCU (network control unit) 9-1, 9-2,..., Meters 11-1, 11-2,. 7-1, 7-2,... Indicate customers.
[0010]
The center 3 has a center parent device 3-1 and a center child device 3-2 and 3-3 which are represented by a representative contract. The PBX switch 4 is a center-side switch and includes a representative selection device 5. The representative selection device 5 distributes the received message from the terminal side to the center slave units 3-2 and 3-3 other than the center master unit 3-1, and causes the incoming calls to be received. The center 3 side and the NCUs 9-1, 9-2,... Are connected by an ISDN public line 6. The meters 11-1, 11-2,... Are gas meters. The present invention can be applied not only to gas meters but also to meters such as electricity and water, security and other information terminals. The representative selection device 5 may be a part of an exchange of the ISDN public line 6.
[0011]
In this embodiment, when calling the center 3 having a plurality of lines from the terminal side, first, the NCU 9-1 on the terminal side calls to the representative telephone number of the center 3, and the representative selection device 5 on the center 3 side An incoming call is made to a center child device 3-2 or center child device 3-3 other than the center parent device 3-1. The center slave unit 3-2 or the center slave unit 3-3 that has received the call adds a calling telephone number information in which the telephone number of the center slave unit is set to the UUI (user / user information) and responds to the terminal side. Thereafter, the terminal side performs UUI (user / user information) communication toward the calling telephone number.
[0012]
FIG. 3 is a format diagram of the SETUP message 21 communicated between the center 3 and the NCU 9. Header information is set in the header 23. In SETUP 25, SETUP (call setting) is set. In the UUI (user / user information) 27, calling number information 29 is set together with information such as a start message, a data request, or an end request.
[0013]
A communication sequence when calling the center 3 having a plurality of lines from the terminal side in this embodiment will be described in detail. FIG. 2 shows a communication sequence when calling the center 3 having a plurality of lines from the terminal side. As shown in FIG. 2, first, the terminal 11 makes an initial call with the representative telephone number A from the meter 11-1. That is, the meter 11-1 transmits a startup message to the NCU 9-1 (step 200). The NCU 9-1 adds a terminal call initial call to the UUI (user / user information) 27 of the SETUP message 21 toward the representative telephone number A, and sends the SETUP message 21 to the center 3 side via the ISDN public line 6. Transmit (step 201). The representative selection device 5 distributes the received terminal call initial call to the child line of the center 3, and makes the center child device 3-2 receive the incoming call, for example. (Step 202).
[0014]
When the center handset 3-2 receives the terminal call initial call and the center 3-2 transmits a request message as a response, the request message is displayed in the UUI (user / user information) 27 of the SETUP message 21 (FIG. 3). At the same time, the telephone number B of the center handset 3-2 is added to the calling telephone number information 29, and then the SETUP message 21 is sent to the NCU 9-1 via the ISDN public line 6 (step 210, step 211). The NCU 9-1 transmits a request message to the meter 11 (step 212).
[0015]
Next, when the meter 11 transmits the second UUI (user / user information), the meter 11-1 makes a terminal call second call to the center 3 side (step 220). The NCU 9-1 sets a response message in the UUI (user / user information) 27 of the SETUP message 21 toward the telephone number B of the center slave unit 3-2 of the calling telephone number information 29 received earlier, and then The message 21 is transmitted to the center slave unit 3-2 via the ISDN public line 6 (step 221). The representative selecting device 5 causes the center slave unit 3-2 to receive the received response message (step 222). Thereafter, the NCU 9-1 transmits UUI (user / user information) to the telephone number B of the calling telephone number information during a series of communications.
[0016]
Next, when such UUI (user / user information) communication is completed and the terminal side makes the next terminal call initial call again, the center 3 side is called with the representative telephone number A (step 300, step 3). 301), the representative selection device 5 distributes the received activation message to the center slave unit 3-2 or the center slave unit 3-3 to receive the incoming call (step 302).
[0017]
As described above, according to the present embodiment, when the center 3 is called from the terminal side by the representative telephone number, the representative selection device 5 on the center 3 side is connected to the center slave unit 3-2 or the center other than the center master unit 3-1. The mobile phone 3-3 distributes the incoming calls, adds the caller phone number information in which the phone number of the center slave phone is set to the UUI (user / user information) packet, and responds to the terminal side. UUI (user / user information) communication is performed toward the telephone number. Thereby, the terminal side can transmit the second and subsequent packet communications to the same center slave unit.
[0018]
In this embodiment, the caller ID information in which the telephone number of the center slave unit is set is added to the UUI (user / user information) to respond, but the center side is a caller who is a public network service. A method of transmitting the telephone number of the center slave unit using the telephone number notification is also possible.
Furthermore, although the representative selection device 5 is provided in the PBX switch 4, a public switch (not shown) of the ISDN public line 6 may function as the representative selection device 5.
[0019]
【The invention's effect】
As described above in detail, according to the present invention, in a center having a plurality of slave units using UUI (user / user information) communication, a terminal that has continued with a specific center slave unit while maintaining line efficiency. An ISDN communication system that enables call reception can be provided.
[Brief description of the drawings]
FIG. 1 is a schematic configuration diagram of an ISDN communication system 1 according to an embodiment of the present invention. FIG. 2 is a diagram showing a communication sequence when a terminal 3 calls a center 3 having a plurality of lines. Format diagram [Explanation of symbols]
1 ... ISDN communication system 3 ... Center 4 ... PBX switch 5 ... Representative selection device 6 ... ISDN public line 7 ... Consumer 8 ... DSU
9 ……… NCU
11 ... Gas meter 21 ... SETUP message 23 ... Header 25 ... SETUP
27 ……… UUI

Claims (5)

センタ側は、代表回線とそれ以外の少なくとも２回線と、それに対応する親機と、少なくとも２台の子機を有し、
前記センタ側と端末との間でＩＳＤＮ公衆回線を介して通信を行うＩＳＤＮ通信システムにおいて、
端末が前記センタ側の親機を呼び出すと、センタ側は、親機以外のいずれかの子機に着信させ、着信した子機に対応する回線の電話番号をユーザ・ユーザ情報か発信者電話番号通知に付けて前記端末に応答し、
前記端末は、以後、当該呼び出しによる一連の通信が完了するまでの間、この子機に対応する電話番号でパケット通信を行うことを特徴とするＩＳＤＮ通信システム。The center side has a representative line and at least two other lines, a parent device corresponding to the representative line, and at least two child devices.
In an ISDN communication system for performing communication between the center side and a terminal via an ISDN public line,
When the terminal calls the center base unit , the center side makes a call to any slave unit other than the base unit, and the telephone number of the line corresponding to the received slave unit is sent to the user / user information or caller phone number notification. And respond to the terminal ,
Thereafter, the terminal performs packet communication using a telephone number corresponding to the handset until a series of communication by the call is completed . 前記端末はメータであることを特徴とする請求項１記載のＩＳＤＮ通信システム。  2. The ISDN communication system according to claim 1, wherein the terminal is a meter. 前記メータはガスメータ、水道メータ、電気メータのうちいずれかであることを特徴とする請求項２記載のＩＳＤＮ通信システム。  The ISDN communication system according to claim 2, wherein the meter is any one of a gas meter, a water meter, and an electric meter. ＩＳＤＮ公衆回線側が、前記センタの前記代表回線と、前記２回線の選択を行うことを特徴とする請求項１記載のＩＳＤＮ通信システム。  The ISDN communication system according to claim 1, wherein the ISDN public line side selects the representative line of the center and the two lines. センタ側は、代表回線とそれ以外の少なくとも２回線と、それに対応する親機と、少なくとも２台の子機を有し、
前記センタ側と端末との間でＩＳＤＮ公衆回線を介して通信を行うＩＳＤＮ通信方法において、
端末が前記センタ側の親機を呼び出すと、センタ側は、親機以外のいずれかの子機に着信させ、着信した子機に対応する回線の電話番号をユーザ・ユーザ情報か発信者電話番号通知に付けて前記端末に応答し、
前記端末は、以後、当該呼び出しによる一連の通信が完了するまでの間、この子機に対応する電話番号でパケット通信を行うことを特徴とする通信方法。The center side has a representative line and at least two other lines, a parent device corresponding to the representative line, and at least two child devices.
In an ISDN communication method for performing communication between the center side and a terminal via an ISDN public line,
When the terminal calls the center base unit , the center side makes a call to any slave unit other than the base unit, and the telephone number of the line corresponding to the received slave unit is sent to the user / user information or caller phone number notification. And respond to the terminal ,
Thereafter, the terminal performs packet communication using a telephone number corresponding to the handset until a series of communication by the call is completed .
JP07794199A 1999-03-23 1999-03-23 ISDN communication system and communication method Expired - Fee Related JP3911529B2 (en)

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