CN1267983A

CN1267983A - Multidirectional multiplexing communication system and communication method of comprehensive service net-point to multipoint

Info

Publication number: CN1267983A
Application number: CN00103127.9A
Authority: CN
Inventors: 永岛孝一
Original assignee: NEC Corp
Current assignee: NEC Corp
Priority date: 1999-03-17
Filing date: 2000-03-17
Publication date: 2000-09-27
Anticipated expiration: 2020-03-17
Also published as: JP3076329B1; AU773721B2; AU2235400A; CN1161926C; JP2000269889A

Abstract

To attain multiple address communication from a master ISDN terminal to all slave ISDN terminals. A base station 4 is terminated up to a layer 2 with respect to an ISDN 3, and monitors a layer 3 message from slave stations 5, 6 and from the ISDN 3. Upon the receipt of a call setup request message sent from a master ISDN terminal 1, a Dch message TS and Bch TS are assigned and the base station 4 informs the slave stations 5, 6 about the assignment though a control channel in common to the slave stations to make call setup processing to the master ISDN terminal 1. When the slave stations 5, 6 receive a communication channel setup message from the base station 4, they make call setup processing to slave ISDN terminals 80, 81 and a communication channel is established with the base station through the Dch message TS and the Bch TS. When the slave ISDN terminal makes a call for communication with the master ISDN terminal, the master ISDN terminal makes call setup processing to the slave ISDN terminal and inquires of the base station about the Dch message TS and the Bch TS and a call number to set up a communication channel.

Description

Multidirectional multiplexing communication system and integrated services digital network point-to-multipoint communication

The present invention relates to the Integrated Service Digital Network service in multidirectional multiplex communication system, the communication of the point-to-multipoint of more specifically saying so.

Such a kind of traditional integrated services digital network point-to-multipoint communication that uses in multidirectional multiplex communication system is published in " the integrated services digital network method of servicing in multidirectional multiplex communication system " of Japanese unexamined patent gazette No.10-322758 announcement.

As shown in figure 17, according to top list of references, in the integrated services digital network method of servicing, termination is carried out at the layer 2 between isdn network 3 and the base station 4 and between auxiliary ISDN terminal 80 and auxiliary station 5, and traditional communication protocol is to use between base station 4 and auxiliary station 5, thereby carries out the frame relay of ISDN layer 3 information.

Auxiliary station 5 monitors from layer 3 information of base station 4 and auxiliary ISDN terminal 80 and operates with the initial sum on-hook that detects isdn call.Along with this operation, auxiliary station 5 distributes B channel time slot and produces a release asks base station 4.By carrying out such requirement-distributed lines control, the route utilization ratio is enhanced, and the number of users of holding increases.

According to top traditional technology, the distribution/release between a base station and auxiliary station is that basis is carried out based on initial/on-hook operation of the point-to-multipoint delivery of demand-plan of distribution.Yet, because at one that is connected to an isdn network main ISDN terminal (not shown) be connected between the auxiliary ISDN terminal of an auxiliary station and carry out communication in 1: 1, so can not carry out multiadress calling.For this reason, in order to send identical information from main ISDN terminal to all auxiliary ISDN terminal, the frame relay of layer 3 information must be repeated to be equal to the number of times of the number of assisting ISDN terminal.

The present invention has considered top situation, the purpose of this invention is to provide a kind of multidirectional multiplex communication system and ISDN point-to-multipoint communication, they are in an ISDN terminal that is connected to isdn network and be connected between a plurality of ISDN terminal of a plurality of auxiliary stations and realize 1: the broadcast mode transmission of N.

Another object of the present invention provides a kind of multidirectional multiplex communication system and ISDN point-to-multipoint communication, and they are in an ISDN terminal that is connected to an isdn network and be connected between a plurality of ISDN terminal of same auxiliary station and realize 1: the broadcast mode transmission of N.

Another object of the present invention provides a kind of multidirectional multiplex communication system and ISDN point-to-multipoint communication, 1 above it is realized: transmission of N broadcast mode and two-way communication in 1: 1.

In order to realize top purpose, according to a first aspect of the invention, a kind of multidirectional multiplex communication system is provided, be used in a main ISDN terminal that is being connected to an isdn network under the control of a base station and be contained between a plurality of auxiliary ISDN terminal of a plurality of auxiliary stations carrying out point-to-multipoint delivery, layer 3 information that comprise a D channel distributing to a basic isdn interface and a B channel to be to set up the communication between this base station and all auxiliary station, communication when can carry out from main ISDN terminal to all auxiliary ISDN terminal therein.

In order to realize top purpose, according to a second aspect of the invention, a kind of multidirectional multiplex communication system is provided, be used in the main ISDN terminal that is connected to an isdn network and be contained between a plurality of auxiliary ISDN terminal of a plurality of auxiliary stations of a base stations control forming point-to-multipoint delivery, comprise a base station, its termination isdn network is up to layer 2, supervision from isdn network the layer 3 information and from auxiliary station the layer 3 information, and when a call setup request information via isdn network from this main ISDN terminal transmits, distribute a D channel information time slot (TS) and B channel time slot, and notify these all auxiliary stations of these time slots through a shared control channel of these auxiliary stations, so that pulling together to carry out call setting with main ISDN terminal and a plurality of auxiliary station handles, wherein corresponding ISDN terminal of each auxiliary station termination is up to layer 2, pull together to carry out the call setting processing based on the communication line configuration information that receives from the base station with corresponding auxiliary ISDN terminal, set up a communication line with the base station through a D channel information time slot and B channel time slot, if corresponding ISDN terminal initiation one is called out and is communicated by letter with main ISDN terminal after communication line is formulated, pull together to carry out call setting with corresponding auxiliary ISDN terminal and handle, and by inquiring that this base station is about D channel information time slot, B channel time slot and call number are set up a communication line.

In order to realize top purpose, according to a third aspect of the invention we, a kind of multidirectional multiplex communication system is provided, be used for carrying out point-to-multipoint delivery being connected to the main ISDN terminal of an isdn network under the base stations control and being contained between a plurality of auxiliary ISDN terminal of a plurality of auxiliary stations, this system comprises: a base station, this base station comprises one deck 1 termination circuit that is used for termination layer 1, layer 2 termination circuit that are used for termination layer 2, store each a logical terminal number admin table of logical terminal number of a plurality of auxiliary ISDN terminal, and time slot admin table, for this isdn network, this base station is suitable for carrying out the terminal endpoint identifier allocation processing to auxiliary ISDN terminal, call setting is handled, by initial allocation process of consulting the execution of time slot admin table to D channel information time and B channel time slot based on calling, the management of terminal endpoint identifier, the management of logical terminal number, and the management of call number; This system also comprises a plurality of auxiliary stations, each auxiliary station comprises layer 1 termination circuit that is used for termination layer 1, and layer 2 termination circuit that are used for termination layer 2, auxiliary station is suitable for pulling together to carry out the terminal endpoint identifier allocation processing with accordingly auxiliary ISDN terminal and call setting is handled, and by accepting from the notice of base station or by a shared control channel of all auxiliary stations an inquiry acquisition terminal endpoint identifier and a call number to be carried out in the base station; Also comprise a terminal, it is connected to this base station, so that register this logical terminal number in the logical terminal number admin table.

Another aspect preferably of multidirectional multiplex communication system according to the present invention, when main ISDN terminal is passed through this base station when all auxiliary stations send an assigned I SDN terminal communication solicited message, and should the appointed auxiliary ISDN terminal of request accept, perhaps after receiving the contention of base station affirmation from the communication request of auxiliary station of the communication request information that auxiliary ISDN terminal sends from this, when a communication request is accepted by this main ISDN terminal, can carry out the communication between main ISDN terminal and each auxiliary ISDN terminal.

In order to realize top purpose, according to a forth aspect of the invention, a kind of multidirectional multiplex communication method is provided, be used for carrying out point-to-multipoint delivery being connected to the main ISDN terminal of an isdn network under the base stations control and being contained between a plurality of auxiliary ISDN terminal of a plurality of auxiliary stations, in the base station, comprise the step of termination isdn network up to layer 2, supervision is from the step of layer 3 information of isdn network and auxiliary station, and based on the reception of rising in a call setup request of main ISDN terminal through isdn network, the step of distributing D channel information time slot and B channel time slot, and notify all auxiliary stations these time slots by the control channel that auxiliary station is shared, thereby pulling together to carry out call setting with main ISDN terminal handles, and in each of a plurality of auxiliary stations, comprise a termination assisting in the ISDN terminal step up to layer 2, pull together to carry out the step that call setting is handled based on reception with corresponding auxiliary ISDN terminal from the communicating route configuration information of base station, thereby set up communication line by a D channel information time slot and B channel time slot and base station, if and calling of auxiliary accordingly ISDN terminal initiation is communicated by letter with this main ISDN terminal after communication line is set up afterwards, pull together to carry out the step that call setting is handled with this accordingly auxiliary ISDN terminal, and by this base station of inquiry relevant D channel information time slot, B channel time slot and call number are set up a communication line.

Can find out clearly that from top each side the present invention has following special good effect.

First effect is can carry out 1 between a main ISDN terminal and a plurality of auxiliary ISDN terminal: the communication of N broadcast mode.This is because public B channel is used for sending to a plurality of auxiliary ISDN terminal from main ISDN terminal.

Second effect is can carry out two-way communication between each of a main ISDN terminal and a plurality of auxiliary ISDN terminal.This is because the B channel bus only can be connected between each of this main ISDN terminal and a plurality of auxiliary ISDN terminal.

With reference to the detailed description below in conjunction with the accompanying drawing that shows embodiments of the invention, above-mentioned purpose, feature and advantage with other of the present invention will become more obvious for the technology skilful person of this area.

Fig. 1 is a calcspar that shows know-why of the present invention;

Fig. 2 is a calcspar that shows the structure arrangement of the first embodiment of the present invention;

Fig. 3 is presented at a sequential flowchart of operating for the terminal endpoint identifier allocation of auxiliary ISDN terminal among first embodiment;

Fig. 4 is presented among first embodiment from the sequential flowchart of main ISDN terminal to the calling of auxiliary ISDN terminal;

Fig. 5 is a schematic diagram, and it has shown main ISDN terminal in first embodiment and the Principle of Communication between the auxiliary ISDN terminal;

Fig. 6 is shown to a sequential flowchart that is issued to the calling of main ISDN terminal among first embodiment from an auxiliary ISDN terminal;

Fig. 7 is a sequential flowchart that is shown to the communication from main ISDN terminal to each auxiliary ISDN terminal among first embodiment;

Fig. 8 is a sequential flowchart that is shown to the communication from an auxiliary ISDN terminal to main ISDN terminal among first embodiment;

Fig. 9 is presented at a sequential flowchart of operating from the on-hook of an auxiliary ISDN terminal among first embodiment;

Figure 10 is a sequential flowchart that shows from the on-hook operation of this main ISDN terminal;

Figure 11 is a calcspar that shows the structural arrangement of the second embodiment of the present invention;

Figure 12 shows to originate in the sequential flowchart of main ISDN terminal to the calling of auxiliary ISDN terminal in a second embodiment;

Figure 13 is a schematic diagram that shows Principle of Communication between main in a second embodiment ISDN terminal and the auxiliary ISDN terminal;

Figure 14 shows to originate in the sequential flowchart of an auxiliary ISDN terminal to the calling of main ISDN terminal in a second embodiment;

Figure 15 is a sequential flowchart that shows the communication from main ISDN terminal to each auxiliary ISDN terminal in a second embodiment;

Figure 16 shows a sequential flowchart of operating from the on-hook of this main ISDN terminal in a second embodiment;

Figure 17 is a calcspar that shows that the structure of a traditional system is provided with.

Several preferred embodiment of the present invention is described below with reference to the accompanying drawings.

At first with reference to the multidirectional multiplex communication system of Fig. 1 description according to the point-to-multipoint delivery scheme of the first embodiment of the present invention.

With reference to Fig. 1, a main ISDN terminal 1 is connected to an isdn network 3 by a network terminating unit (being called as " NT " hereinafter) 2.A base station 4 also is connected to this isdn network 3.An auxiliary ISDN terminal 80 is connected to an auxiliary station 5 by a NT70.An auxiliary ISDN terminal 81 is connected to an auxiliary station 6 by a NT71.

This base station 4 provides the U point to one of isdn network 3 basic isdn

interface.Auxiliary station

5 and 6 provides basic isdn interface U point to

auxiliary ISDN terminal

80 and 81 respectively.Base station 4 is carried out time-sharing multiplex with

auxiliary station

5 and 6 and is communicated by letter.An O﹠amp of the termination number of

ISDN terminal

80 and 81 is assisted in registration therein; M terminal 10 is connected to this base station 4.

Base station 4 and

auxiliary station

5 and 6 respectively termination isdn network 3 and

auxiliary ISDN terminal

80 and 81 up to layer 2.

Auxiliary ISDN terminal

80 and 81 has identical TEI (terminal endpoint identifier) value.Response is from the request of base station 4, and these TEI are distributed to

auxiliary ISDN terminal

80 and 81 from isdn network 3.When base station 4 is activated and

auxiliary station

5 and 6 when being activated, base station 4 is notified to

auxiliary station

5 and 6 to TEI.Base station 4 monitors from Dch (D channel) information from layer 3 information translation of isdn network 3 and auxiliary station 5 and 6.When a call setup request information rising in this main ISDN terminal 1 by when isdn network 3 is transferred to base station 4, Dch information time slot and Bch (B channel) time slots are distributed in base station 4, and this time slot notice

auxiliary station

5 and 6.

Cch (C channel) the 100th, the control channel that auxiliary station is shared and be used for transmission/receiving control information between base station 4 and auxiliary station 5 and 6.Base station 4 is carried out with the call setting of main ISDN terminal 1 and is handled.This O﹠amp; The logical terminal number that

ISDN terminal

80 and 81 are assisted in 10 registrations of M terminal.

Based on the communication line configuration information that receives from base station 4,

auxiliary station

5 and 6 carries out respectively with the call setting of

auxiliary ISDN terminal

80 and 81 and handles.As a result, between base station 4 and

auxiliary station

5 and 6, set up 1: 2 communicating route by Dch information time slot and Bch time slot.

After the communication line of establishing with

base station

4 and 5, if sending one, auxiliary ISDN terminal 81 is used for the calling of communicate by letter with main ISDN terminal 1, base stations 4 are inquired about Dch information time slot, Bch time slot and call number by auxiliary station 6, thereby set up a communication line.This call setting is handled also and is carried out between auxiliary station 6 and auxiliary ISDN terminal 81.

Usually, communicating route is to be set at a broadcast mode that can send data or voice messaging from main ISDN terminal 1 to all auxiliary ISDN terminal 80 and 81.Therefore, transmit the ISDN terminal communication request information of an appointment by base station 4 to all

auxiliary stations

5 and 6 in main ISDN terminal 1, and should ask to carry out the communication in 1: 1 between main ISDN terminal 1 and

auxiliary ISDN terminal

80 or 81 after appointed

auxiliary ISDN terminal

80 or 81 acceptance.

In addition,

auxiliary ISDN terminal

80 or 81 can produce a request and give main ISDN terminal 1, to carry out the communication in 1: 1 between main ISDN terminal 1 and auxiliary ISDN terminal 80 or 81.In this case, received from the base station 4 of the

auxiliary ISDN terminal

80 or 81 communication informations that send, based on the communication request of confirming from auxiliary station, after main ISDN terminal 1 sends communication request information, and should ask by after main ISDN terminal 1 acceptance, communication can be carried out.

Fig. 2 shows the first embodiment of the present invention.With reference to Fig. 2, be connected to base station 4 from one of isdn network 3 basic isdn interface route 91 and communicate by letter with 81 with auxiliary ISDN terminal 80 to allow main ISDN terminal 1.Basic

isdn interface route

92 and 93 be connected to respectively auxiliary station 5 with 6 to allow auxiliary ISDN terminal 80 to communicate by letter with main ISDN terminal 1 with 81.

Base station 4 and

auxiliary station

5 and 6 comprise layer 1

termination circuit

41,51 and 61 that is used for termination layer 1 respectively, and layer 2

termination circuit

42,52 and 62 that are used for termination layer 2.Be provided with according to this structure, between base station 4 and isdn network 3, auxiliary station 5 and auxiliary ISDN terminal 80 and auxiliary station 6 and auxiliary ISDN terminal 81, set up layer 1 synchronous and layer 2 link respectively.As layer 1 termination circuit and layer 2 termination circuit, used known circuit based on the ISDN communication plan of the large scale integrated circuit that meets the ITU-T standard.

Base station 4 is carried out for the TEI allocation process of isdn network 3 and call setting and is handled, and consults a time slot admin table 44 distribution Dch information time slot and Bch time slots when producing by calling out at one, and management TEI and call number.Be connected to this O﹠amp of this base station 4; M terminal 10 is the stored logic termination number in a logical terminal number admin table 43.

Auxiliary station

5 and 6 carries out respectively with the TEI allocation process and the call setting of

auxiliary ISDN terminal

80 and 81 and handles.

Auxiliary station

5 and 6 obtains the TEI and the call number of

auxiliary ISDN terminal

80 and 81 by from the notice of base station 4 or inquire this base station 4 by Cch.Usually, from main ISDN terminal 1 to auxiliary ISDN terminal 80 with 81 communicate by letter and carry out with broadcast mode.Therefore, if will carry out and the communicating by letter of a specific auxiliary ISDN terminal, main ISDN terminal 1 transmits the communication request information of the logical terminal number of an auxiliary ISDN terminal that comprises appointment to all auxiliary stations.After main ISDN terminal 1 is received a response message from that the auxiliary ISDN terminal with this logical terminal number, can carry out this communication.

When each

auxiliary ISDN terminal

80 and 81 will be individually communicate by letter with main ISDN terminal 1, each auxiliary ISDN terminal was to communication request information of base station 4 transmission.After auxiliary ISDN terminal is received a response message of coming autonomous ISDN terminal 1, promptly obtained from a communication request of base station 4 receive information and communication request information after, can carry out this communication.

Next the operation of first embodiment will be described.

(1-1) TEI of auxiliary ISDN terminal distributes:

The TEI distribution of being carried out by

auxiliary ISDN terminal

80 and 81 is described with reference to the sequential flowchart of Fig. 3.When base station 4 by sending that TEI that the TEI request for allocation obtains to isdn network 3 notifies the auxiliary station 5 of those TEI and 6 the time, and

auxiliary ISDN terminal

80 and 81 is when

auxiliary station

5 and 6 transmission TEI request for allocation, TEI is assigned to and assists

ISDN terminal

80 and 81.

(1-2) from the initial calling of main ISDN terminal to auxiliary ISDN terminal:

Describe from the initial calling of main ISDN terminal 1 with reference to the sequential flowchart of Fig. 4 below to auxiliary ISDN terminal 80 and 81.When main ISDN terminal 1 was initiated a calling, a SETUP (setting) information via isdn network 3 was sent to base station 4.Based on the reception of this SETUP information, base station 4 is transmitted a communication line configuration information by Cch to all auxiliary stations 5 and 6.This communication line configuration information is included in Dch information time slot and the Bch time slot between base station 4 and

auxiliary station

5 and 6, and call number.

Based on receiving this communication line configuration information,

auxiliary station

5 and 6 by known program

auxiliary station

5 and 6 with

auxiliary ISDN terminal

80 and 81 between carry out the call setting processing, and distribution by the time slot of communicating route configuration information appointment as a Dch information.Auxiliary station 5 is connected the Bch time slot by the appointment of communication line configuration information with 6, and by time-division switching the Bch in downstream is linked to auxiliary ISDN terminal 80 and 81.Base station 4 is operated the irrelevant program execution and the call setting of main ISDN terminal 1 according to one with each auxiliary station.

Based on finishing that call setting is handled,

auxiliary ISDN terminal

80 and 81 is finished information by using layer 3 information to send the communicating route setting to auxiliary station 5 and 6.

Auxiliary station

5 and 6 finishes message to the communicating route setting of receiving increases logical terminal number, and by the Dch information time slot of notifying on the communication line configuration information synthetic information is sent to base station 4.The message form that is used in this situation is a Dch information format, is unique and uses between each auxiliary station and base station for this system, and converted to layer 3 information by base station 4.

The communicating route setting of being received by base station 4 is finished information and is sent to main ISDN terminal 1 by isdn network 3.Therefore, main ISDN terminal 1 can be identified in the auxiliary station of communication.For top operation, main ISDN terminal 1 can be communicated by letter by using Bch to carry out with

auxiliary ISDN terminal

80 and 81 at 1: 2.

Fig. 5 has shown the Principle of Communication between main ISDN terminal 1 and

auxiliary ISDN terminal

80 and 81.

(1-3) from the initial calling of auxiliary station to main ISDN terminal:

Describe when main ISDN terminal 1 is communicated by letter with auxiliary ISDN terminal 80 with reference to the sequential flowchart of Fig. 6 below, call out beginning and communicate by letter with main ISDN terminal 1 to allow auxiliary ISDN terminal 81.

When auxiliary ISDN terminal 81 was initiated a calling, a SETUP information was sent to auxiliary station 6.Based on the SETUP information that receives from auxiliary ISDN terminal 81, auxiliary station 6 sends a communication line by Cch and solicited message is set to the base station 4, so that obtain Dch information time slot, Bch time slot and a call number.Based on the received communication circuit solicited message is set, base station 4 is returned a communication line that comprises Dch information time slot, Bch time slot and call number to auxiliary station 6 response message is set.

Based on receiving this communication line response message is set, auxiliary station 6 carries out for the call setting of auxiliary ISDN terminal 81 and handles, and distributes Dch information time slot, and by a time-division switching Bch time slot is connected at the downstream Bch aspect the auxiliary ISDN terminal 81.Based on finishing that call setting is handled, auxiliary ISDN terminal 81 sends a communicating route setting by base station 4 and isdn network 3 and finishes information to main ISDN terminal 1.Operation above utilizing, auxiliary ISDN terminal 81 can be communicated by letter with ISDN terminal 1.

(1-4) communication from main ISDN terminal to each auxiliary ISDN terminal:

Describe from main ISDN terminal 1 to the communication of assisting ISDN terminal 80 with reference to the sequential flowchart of Fig. 7 below.

Communication period between main ISDN terminal 1 and

auxiliary ISDN terminal

80 and 81, control information is on layer 3 information, between main ISDN terminal 1 and the base station 4 and

auxiliary station

5 and 6 and

auxiliary ISDN terminal

80 and 81 between, and in transmission/reception between base station 4 and

auxiliary station

5 and 6 on the Dch information unique to this system.Layer 3 information and Dch information are respectively in the base station 4 and auxiliary station 5 conversions.

When main ISDN terminal 1 produced communication request with auxiliary ISDN terminal 80, a communication request information sent to all

auxiliary stations

5 and 6 by isdn network 3 and base station 4 from main ISDN terminal 1.Based on receiving this communication request information, the auxiliary station 5 relevant with auxiliary ISDN terminal 80 is to auxiliary ISDN terminal 80 transmission communication request information.With auxiliary ISDN terminal 80 incoherent auxiliary stations 6 can be based on the communication request information and executing operation of accepting.

Based on the communication request information of accepting, auxiliary ISDN terminal 80 sends a communication request response message to main ISDN terminal 1 by auxiliary station 5, base station 4 and isdn network 3.Based on the communication request information of accepting, main ISDN terminal 1 is returned a communication request response confirmation information to

auxiliary station

5 and 6 by isdn network 3 and base station 4.Reply confirmation based on the communication request that receives, the upstream Bch information channel that auxiliary station 5 connects from auxiliary ISDN terminal 80.Auxiliary station 6 disconnects the Bch information channel in downstream.This operation makes can carry out two-way communication in 1: 1 between main ISDN terminal 1 and auxiliary ISDN terminal 80.

Based on finishing of communication, main ISDN terminal 1 sends information that a demonstration and the traffic carried of communicating by letter of auxiliary ISDN terminal 80 finish to

auxiliary station

5 and 6 by isdn network 3 and base station 4.This communication is finished information and just is sent to from the auxiliary station 5 relevant with this auxiliary ISDN terminal 80 and assists ISDN terminal 80.Finish information based on the communication of accepting, auxiliary ISDN terminal 80 is communicated by letter by auxiliary station 5, base station 4 and isdn network 3 one of transmission and is finished response message to main ISDN terminal 1.

Finish response message based on the communication of accepting, main ISDN terminal 1 is communicated by letter by isdn network 3 and base station 4 one of transmission and is finished response confirmation information to auxiliary station 5 and 6.Finish response confirmation information based on the communication that receives, auxiliary station 5 transmits communication and finishes response confirmation information to auxiliary ISDN terminal 80, and also discharges the upstream Bch information channel from auxiliary ISDN terminal 80.Auxiliary station 6 is connected to auxiliary ISDN terminal 81 with the Bch information channel in downstream.Utilize this operation, communication pattern turns back to from main ISDN terminal 1 to auxiliary ISDN terminal 80 with 81 1: 2 and communicates by letter.

(1-5) from the initial communication of auxiliary station to main ISDN terminal:

With reference to the sequential flowchart of Fig. 8 the traffic operation that allows auxiliary ISDN terminal 80 and main ISDN terminal 1 individually to communicate by letter is described below.

When auxiliary ISDN terminal 80 produced a communication request, communication request information was to be transferred to base station 4 by auxiliary station 5.Based on this communication request information of reception, base station 4 checks whether be to receive a communication request from other auxiliary ISDN terminal 81.Have only when the communication request do not received from other-end, base station 4 is transmitted the communication request information of receiving by isdn network 3 to main ISDN terminal 1, and will send a relevant communication request of assisting ISDN terminal 80 receive information

auxiliary station

5 and 6.

Based on this communication request information that receives, the communication request response message that main ISDN terminal 1 sends for auxiliary ISDN terminal 80 arrives base station 4.Base station 4 is transmitted and is used for assisting the communication request response message of receiving of ISDN terminal 80 to auxiliary station 5 and 6.Based on the communication request response message that receives for auxiliary ISDN terminal 80 from base station 4, each

auxiliary station

5 and 6 check this then information whether be a communication request response message for this auxiliary ISDN terminal, this auxiliary ISDN terminal is relevant with corresponding auxiliary station.

The auxiliary station 5 relevant with auxiliary ISDN terminal 80 transmits the communication request response message received to auxiliary ISDN terminal 80, and connects upstream Bch information channel from auxiliary ISDN terminal 80 by time-division switching.The Bch that disconnects from the downstream of auxiliary ISDN terminal 81 with auxiliary ISDN terminal 80 incoherent auxiliary stations 6.This operation makes it possible to carry out two-way communication in 1: 1 between auxiliary ISDN terminal 80 and main ISDN terminal 1.

When communication was finished, a communication was finished information and is sent to main ISDN terminal 1 by auxiliary station 5, base station 4 and isdn network 3 from auxiliary ISDN terminal 80.Finish message based on the communication that receives, main ISDN terminal 1 is communicated by letter by isdn network 3 and base station 4 one of transmission and is finished response message to auxiliary station 5 and 6.Finish response message based on the communication that receives, auxiliary station 5 transmits communication and finishes response message to auxiliary ISDN terminal 80, and disconnects the upstream Bch information channel from auxiliary ISDN terminal 80.Auxiliary station 6 is connected to auxiliary ISDN terminal 80 with the Bch information channel in downstream.Based on this operation, communication pattern turns back to from main ISDN terminal 1 to auxiliary ISDN terminal 80 with 81 1: 2 and communicates by letter.

(1-6) on-hook of auxiliary ISDN terminal operation certainly:

Describe from the on-hook of auxiliary ISDN terminal 80 with reference to the sequential flowchart of Fig. 9 below and operate.

When auxiliary ISDN terminal 80 was carried out the on-hook operation, a disc message sent to auxiliary station 5 from auxiliary ISDN terminal 80.Based on the DISC information that receives, auxiliary station 5 transmits by Cch and transmits one 80 communicating route release information, and discharges Dch information time slot and Bch information channel from auxiliary ISDN terminal 80.On-hook operation between auxiliary ISDN terminal 80 and auxiliary station 5 is to finish by a known program.

(1-7) on-hook of autonomous ISDN terminal operation:

Describe the on-hook operation of autonomous ISDN terminal 1 below with reference to the sequential flowchart of Figure 10.

When main ISDN terminal 1 was carried out the on-hook operation, a DISC information sent from main ISDN terminal 1 by isdn network 3.Based on the DISC information that receives, base station 4 is transmitted a communication line by Cch to

auxiliary station

5 and 6 and is discharged information, and discharges Dch information time slot, Bch time slot and Bch information channel.On-hook operation in main ISDN terminal 1 is what to carry out between main ISDN terminal 1 and base station 4 by a known program.

Discharge information based on the communication line that receives,

auxiliary station

5 and 6 discharges Dch information time slot and Bch time slot respectively by known program, and the on-hook of execution and

auxiliary ISDN terminal

80 and 81 is handled.

Next second embodiment of the invention is described with reference to the accompanying drawings.

Figure 11 has shown the structure setting of second embodiment.According to the system configuration of first embodiment, each auxiliary station holds an auxiliary ISDN terminal.In a second embodiment, each auxiliary station holds a plurality of auxiliary ISDN terminal.In addition, provide a logical terminal number admin table 53, controlled a plurality of auxiliary ISDN terminal to allow each auxiliary station for auxiliary station.

(2-1) TEI of auxiliary ISDN terminal distributes:

As at first embodiment, when from a base station 4 notice TEI, TEI is assigned to

auxiliary ISDN terminal

80 and 81, and

auxiliary ISDN terminal

80 and 81 sends the TEI request for allocation to auxiliary station 5.

(2-2) from the initial calling of main ISDN terminal to auxiliary ISDN terminal:

Figure 12 has shown from the initial order to the calling of

auxiliary ISDN terminal

80 and 81 of main ISDN terminal 1.This is different from the order among first embodiment in proper order, received promptly that auxiliary station 5 from a communicating route SETUP information of base station 4 carries out with the call setting of a plurality of

auxiliary ISDN terminal

80 and 81 and handled and control operation, to connect the Bch in Bch time slot and downstream by a time-division switching.

Corresponding with

auxiliary ISDN terminal

80 and 81 and be added to the communication line setting that sends to base station 4 from auxiliary station 5 by the logical terminal number that auxiliary station 5 is selected finish the information from logical terminal number admin table 53.By Cch 100, from the O﹠amp that is connected to base station 4; The logical terminal number of M terminal 10 is registered in the logical terminal number admin table 53 of auxiliary station 5.

Figure 13 has shown the Principle of Communication between main ISDN terminal 1 and

auxiliary ISDN terminal

80 and 81.

(2-3) from the auxiliary initial calling of ISDN terminal to main ISDN terminal:

Figure 14 has shown between main ISDN terminal 1 and auxiliary ISDN terminal 80 in the communication, an initial order of calling that allows auxiliary ISDN terminal 81 to communicate by letter with main ISDN terminal 1.This is different from first embodiment in proper order, that is, because auxiliary station has occupied a Bch time slot and call number, handle so auxiliary station 5 just calls out to produce in the inner execution of auxiliary station, and to the base station any communicating route of 4 transmissions solicited message is not set.

(2-4) communication from main ISDN terminal to each auxiliary ISDN terminal:

Figure 15 has shown a sequence that is used for the communication from main ISDN terminal 1 to auxiliary ISDN terminal 80.This is different from the order among first embodiment in proper order, promptly because auxiliary station 5 contains a plurality of auxiliary ISDN terminal, so auxiliary station 5 controls are to except the Bch information channel by the downstream of the auxiliary ISDN terminal 81 the auxiliary ISDN terminal of main ISDN terminal appointment.

(2-5) communication from auxiliary ISDN terminal to main ISDN terminal:

This operation is different from the operation among first embodiment, be whether communication request of auxiliary station inspection is to receive from any one the auxiliary ISDN terminal except the auxiliary ISDN terminal that produces a communication request, and have only when not receiving any communication request to communication request information of main ISDN terminal transmission.

(2-6) operate from the on-hook of auxiliary ISDN terminal:

This operation is different among first embodiment, if an auxiliary ISDN terminal promptly except the auxiliary ISDN terminal that sends a DISC information is under the situation of communication, auxiliary station does not discharge Dch information time slot, when all auxiliary ISDN terminal in being contained in auxiliary station are set at hook state, discharge Dch information time slot.

(2-7) come the on-hook of autonomous ISDN terminal to operate:

Figure 16 has shown an order of the on-hook operation that is used for coming autonomous ISDN terminal 1.This operation is different from the operation among first embodiment,, discharges information based on the communication line of accepting from the base station that is, and auxiliary station 5 carries out the on-hook processing for a plurality of

auxiliary ISDN terminal

80 and 81 that is contained in the auxiliary station 5.

As described above, according to the second embodiment of the present invention, a main ISDN terminal be contained between a plurality of auxiliary ISDN terminal in the auxiliary station and can finish 1: the communication of N broadcast mode.

Claims

1. a multidirectional multiplex communication system is used under the control of a base station, in a main ISDN terminal that is connected to an isdn network be contained between a plurality of auxiliary ISDN terminal in a plurality of auxiliary stations and carry out point-to-multipoint delivery, comprising:

Shared time slot to layer 3 information distribution of the D channel of basic isdn interface and B channel, to set up the communication line between described base station and all described auxiliary station, communication when wherein can carry out from described main ISDN terminal to all described auxiliary ISDN terminal.

2. a multidirectional multiplex communication system is used under the control of a base station, in a main ISDN terminal that is connected to an isdn network be contained between a plurality of auxiliary ISDN terminal in a plurality of auxiliary stations and form point-to-multipoint delivery, comprising:

A base station, the described isdn network of its termination is up to layer 2, supervision from described isdn network the layer 3 information and from described auxiliary station the layer 3 information, and when when the described isdn network of a call setup request information via of described main ISDN terminal transmits, distribute a D channel information time slot and B channel time slot, and notify all described auxiliary stations described time slot through a shared control channel of described auxiliary station, handle so that pull together to carry out call setting with described main ISDN terminal, and

A plurality of auxiliary stations, corresponding ISDN terminal of each auxiliary station termination is up to layer 2, pull together to carry out the call setting processing based on a communication line configuration information and the corresponding auxiliary ISDN terminal that receive from described base station, communication line by a D channel information time slot and B channel time slot foundation and described base station, if calling of corresponding ISDN terminal initiation will be communicated by letter with described main ISDN terminal after the communication route is set up, then pulling together to carry out call setting with corresponding auxiliary ISDN terminal handles, and by the described base station of inquiry relevant D channel information time slot, B channel time slot and call number are set up a communication line.

3. a multidirectional multiplex communication system is used under the control of a base station, in a main ISDN terminal that is connected to an isdn network be contained between a plurality of auxiliary ISDN terminal in a plurality of auxiliary stations and carry out point-to-multipoint delivery, comprising:

One base station, it comprises

One deck 1 termination circuit that is used for termination layer 1,

One deck 2 termination circuit that are used for termination layer 2,

Store each the logical terminal number admin table of logical terminal number in described a plurality of auxiliary ISDN terminal, and

A time slot admin table,

Described base station be suitable for carrying out to the terminal endpoint identifier allocation processing of auxiliary ISDN terminal, call setting handle, by initially consulting the allocation process that described time slot admin table is carried out D channel information time slot and B channel time slot based on what call out, the management of terminal endpoint identifier, the management of logical terminal number, and the management of call number;

A plurality of auxiliary stations, each auxiliary station comprises:

Layer 1 termination circuit that is used for termination layer 1, and

Layer 2 termination circuit that are used for termination layer 2,

Described auxiliary station is suitable for pulling together to carry out the terminal endpoint identifier allocation processing with corresponding auxiliary ISDN terminal and call setting is handled, and by receiving from the notice of described base station or by a shared control channel of all described auxiliary stations an inquiry is carried out to obtain terminal endpoint identifier and call number in described base station; And

A terminal, it is connected to described base station so that register logical terminal number in described logical terminal number admin table.

4. a system according to claim 3, each that it is characterized in that described a plurality of auxiliary stations accommodates a plurality of auxiliary ISDN terminal, and each described auxiliary station comprises a logical terminal number admin table that is used to control described auxiliary ISDN terminal.

5. a system according to claim 1, the terminal endpoint identifier that it is characterized in that all described auxiliary ISDN terminal numerically equates, when described base station is activated and described auxiliary station when being activated, response is from a request of described base station, and the terminal endpoint identifier is assigned with and notifies from described base station all described auxiliary stations from isdn network.

6. a system according to claim 2, the terminal endpoint identifier that it is characterized in that all described auxiliary ISDN terminal numerically equates, when described base station is activated and described auxiliary station when being activated, response is from a request of described base station, and the terminal endpoint identifier is assigned with and notifies from described base station all described auxiliary stations from isdn network.

7. a system according to claim 3, the terminal endpoint identifier that it is characterized in that all described auxiliary ISDN terminal numerically equates, when described base station is activated and described auxiliary station when being activated, response is from a request of described base station, and the terminal endpoint identifier is assigned with and notifies from described base station all described auxiliary stations from isdn network.

8. a system according to claim 4, the terminal endpoint identifier that it is characterized in that all described auxiliary ISDN terminal numerically equates, when described base station is activated and described auxiliary station when being activated, response is from a request of described base station, and the terminal endpoint identifier is assigned with and notifies from described base station all described auxiliary stations from isdn network.

9. a multidirectional multiplex communication method is used under the control of a base station, in a main ISDN terminal that is connected to an isdn network be contained between a plurality of auxiliary ISDN terminal in a plurality of auxiliary stations and carry out point-to-multipoint delivery, comprising:

In described base station,

The termination isdn network is up to the step of layer 2;

Supervision is from the step of layer 3 information of isdn network and described auxiliary station; And

Based on distributing D channel information time slot and B channel time slot for the reception of a call setup request information of initiating from described main ISDN terminal by isdn network, and the step of notifying all described auxiliary stations of these time slots through a shared control channel of described auxiliary station, handle thereby pull together to carry out call setting with described main ISDN terminal, and

In each of described a plurality of auxiliary stations,

Assist the ISDN terminal termination up to layer 2 accordingly with one in the described auxiliary ISDN terminal;

Based on reception, pull together to carry out the step that call setting is handled with corresponding auxiliary ISDN terminal, thereby set up a communicating route by a D channel information time slot and B channel time slot and described base station from the communication line configuration information of described base station; And

If corresponding auxiliary ISDN terminal initiation one is called out and is communicated by letter with described main ISDN terminal after communication line is formulated, then pulling together to carry out call setting with corresponding auxiliary ISDN terminal handles, and pass through the described base station of inquiry about D channel information time slot, B channel time slot and call number, set up a communication line.