JPH1094038A - Mutual connection device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To perform mutual communication with the terminal of the different kind of a network provided with a physical interface with a line switching type network by exchanging information with each other and setting a logic circuit mutually between them. SOLUTION: Inside these mutual connection devices 11, 12 and 13, a radio interface card, a wireless LAN card and a PSIN or ISDN interface card are positioned in the same layer and logic line control parts 1, 1201 and 1301 are positioned in the high-order layer. Further, an internet protocol layer and an application are positioned in the high-order layer. The logic line control parts 1, 1201 and 1301 of the respective mutual connection devices 11, 12 and 13 perform logical call control over the respective kinds of communication interface cards and the plural mutual connection devices and realize mutual connection. A mobile terminal equipment for receiving voice communication and data communication services comes and goes among the radio areas of the respective mutual connection devices.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an interconnection apparatus for interconnecting mobile terminals moving within a premises and between a mobile terminal and an application on a LAN in a communication system constructed on the premises.

[0002]

2. Description of the Related Art In recent years, communication systems aiming at efficient operation of wireless telephones within a company premises have become widespread. Such a communication system is constructed by installing electronic exchanges at a plurality of places in a company premises, such as a living room, a factory, and a laboratory, and connecting these electronic exchanges to each other by a high-speed digital line or the like. Each electronic exchange is provided with a base station, and a radio telephone can make a call through these base stations.

[0003] In such a communication system, attention has recently been paid to information networking. The information networking here is advanced in the following two points. The first is to connect portable devices such as electronic organizers, pagers, small computers, etc. to the wireless telephone. The second is to connect a LAN to which a personal computer and workstation are connected to the electronic exchange. It is.

As described above, when a portable device is connected to the wireless telephone and a LAN is connected to the electronic exchange, a personal computer and a work station (LAN) are connected from the portable device via the wireless telephone, the base station, and the electronic exchange. These are generally referred to as nodes.) Briefly explaining this packet transmission, a small computer on the wireless telephone side connects a base station and an electronic exchange via a line before accessing a node on the LAN. When the line can be connected to the electronic exchange, the electronic exchange connects to the LAN. As described above, when a connection to the LAN via the electronic exchange and transmission of a packet addressed to the node on the LAN are made, the ARP (Addr
ess Resolution Protocol), the packet is sent to the node.

[0005]

The first problem in the above-mentioned conventional communication system is as follows.
From a small computer via an electronic exchange to a LAN
It is possible to send packets to
It is impossible to send a packet reliably from a node on N to a small computer. The reason why transmission is impossible is based on the fact that a node on the LAN cannot grasp the roaming of the wireless telephone. Roaming of a wireless telephone means that the wireless telephone moves between electronic exchanges. Roaming between electronic exchanges can be realized by setting in advance each electronic exchange the extension numbers, system IDs, authentication keys, and the like of all wireless telephones that may roam to the own exchange. This is because even if such an electronic exchange is set, if the electronic exchange is further connected to the LAN, the nodes on the LAN are no longer aware of roaming. For example, it is assumed that a wireless telephone connected to a mobile device has left a room or the like to which the owner belongs and moved to a factory. If the node on the LAN attempts to send a packet to the wireless telephone after moving in this way, the node connects to the electronic exchange in the room where the wireless telephone is originally located. There is no other way. Even if the mobile telephone is connected to the electronic exchange in the living room, there is no wireless telephone in a state where the base station connected to the electronic exchange makes a general call to the wireless telephone.

A second problem is that even if a node on the LAN can grasp the location of the wireless telephone, there is a difference in capability between the node and the portable device, and the node side has a TCP / IP.
(Transmission Control Protocol / Internet Protocol)
, While the mobile device side uses TCP / IP
(Transmission Control Protocol / Internet Protocol)
If they cannot be implemented, they may not be able to communicate equally. If equal communication is not possible in this way, even if an application on the LAN or the Internet provides various communication services, the portable device cannot enjoy these communication services.

If the other party cannot implement the communication protocol, it is conceivable to use some kind of relay means to substitute the connection protocol instead of the wireless telephone. However, even though a portable computer can be connected to a small computer, it is possible to implement the connection protocol. , There are variations among each of the mobile devices. In this way, it is very difficult for the relay means to substitute for the connection protocol or to cancel the connection protocol in consideration of the difference in the capabilities of the individual portable devices.

A first object of the present invention is to allow a node on a LAN to freely access portable devices such as an electronic organizer, a pager, and a small computer connected to a radio telephone which roams freely on the premises. It is an object of the present invention to provide an interconnecting device that enables the construction of a communication system that can perform the communication. A second object of the present invention is to provide an interconnecting device which enables a portable computer connected to a telephone to mutually communicate with a node on a LAN and further realizes roaming. It is.

[0009] A third object of the present invention is to provide an interconnection device which enables interconnection between a portable device such as a telephone, an electronic organizer, a pager, and a small computer connected to the telephone, and an application on a LAN. , So that LAN
Connection protocol such as TCP / IP (Transmissi
An object of the present invention is to provide an application service on a LAN or the Internet to a portable device such as an electronic organizer that does not implement on Control Protocol / Internet Protocol). It also transmits voice and messages from applications on the LAN and the Internet to devices such as telephones, electronic organizers, and pagers, and conversely, voice from devices such as telephones, electronic organizers and pagers to applications on the LAN and the Internet. And messages can be transmitted.

[0010]

According to the present invention, when a mobile terminal moves and enters a different radio area, information necessary for connection with the mobile terminal is loaded, and the connection requested by the connection is requested. Current position management means for the mobile terminal, wherein the location information of the destination mobile terminal is loaded at the time of receiving the connection request; address management means for managing the correspondence between the mobile terminal to be connected to the LAN and the LAN address; Connection,
A plurality of interconnecting devices having logical line control means for enabling roaming in a plurality of connection forms such as LAN connection, connection with an application, and non-IP communication exchange information with each other and establish a logical line between the interconnecting devices. It is realized by setting.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An interconnection device according to an embodiment of the present invention will be described below with reference to the drawings. The interconnection device according to the present embodiment has a card slot capable of providing a plurality of communication interface cards, and
SCO's operating system UNIXware Ver.2.02
(Registered trademark), which are connected to each other to construct a communication system. Each interconnect device
Processes and libraries that run on UNIXware2.02 and
It consists of a driver module incorporated in UNIXware2.02.

FIG. 1 is a diagram showing a communication system constructed by interconnecting interconnecting devices according to an embodiment of the present invention, and also showing an internal hierarchy of each interconnecting device. In FIG. 1, the interconnection device 11, the interconnection device 1
2. Wireless interface card, wireless LAN card, PSTN or ISDN inside the interconnection device 13
Are located in the same layer, and logical line controllers 1, 1201 and 1301 are located in these upper layers. Logical line control units 1101, 1201, 130
An internet protocol (IP) layer and an application are located in the upper layer of 1. The logical line controllers 1101, 1201, and 1301 of each interconnect device perform logical call control over various communication interface cards and a plurality of interconnect devices, and realize interconnects. Mobile terminal devices receiving voice communication and data communication services move between wireless areas of each interconnection device.

The communication interface cards provided in the card slots are connected to ISA or PCI system buses 1180, 1280, and 1380, respectively, to provide a 32Kbps or 64Kbps data bus 11 for stream data transmission.
90, 1290, and 1390. There is a method of using a configuration file (not shown) of the operating system for associating the card number assigned to the communication interface card installed in each card slot with the type of each communication interface card. In this method, when the logical line control unit 1 designates a combination among a plurality of card numbers described in a configuration file, data between the cards of the combination is placed on a 32 Kbps or 64 Kbps data bus for stream data transmission. Establish a path. The data path is a path for transferring data between two communication interface cards. The technique of establishing a data path between the communication interface cards is a known technique, and therefore a detailed description is omitted.

If the interconnecting devices are equipped with ISDN or PSTN communication interface cards, each interconnecting device can be interconnected via an ISDN or PSTN communication interface card. In addition, the interconnecting device may be an Ethernet communication interface card or an isochronous Ethernet defined by IEEE802.9a.
If a communication interface card for rnet is installed, use the IP protocol, IPX protocol, etc.
They can be connected to each other by a LAN. In the present specification, establishing a connection between communication interface cards or between a communication interface card and an application process, including a connection between such interconnecting devices, is called establishment of a logical circuit (Virtual Circuit). Applications and terminals in the communication system communicate with each other via the logical line.

Next, roaming management of a mobile terminal in a communication system constructed by a plurality of interconnecting devices will be described with reference to the explanatory diagrams of FIGS.
FIG. 3 is an explanatory diagram showing how each interconnect device performs roaming management in the present embodiment,
The order of this processing is indicated by a symbol. In FIG. 3, the interconnection device has a plurality of base stations forming a wireless area. Each interconnecting device has its own device number (referred to as a cluster number) and is responsible for a plurality of mobile terminals. Here, the jurisdiction of the mobile terminal means that the paging area information, current position information, communication partner, communication form information, and address information of the mobile terminal are continuously managed. The paging area information is information indicating which wireless area should be used to call a mobile terminal that moves between wireless areas. The current position information is information indicating the position of a mobile terminal that moves between wireless areas. The communication mode information, communication partner, and address information will be described later in detail. Further, the interconnecting device stores the current position information for mobile terminals located in the wireless area of the own device regardless of the jurisdiction of the own device and the jurisdiction of other devices. The area information may be collectively referred to as position information.)

Each mobile terminal is assigned a PS number including the cluster number of the interconnecting device under its control in the upper two digits. The mobile terminal assigned in this way is referred to as a jurisdictional mobile terminal under the jurisdiction of the interconnecting device. There are other methods of associating the interconnecting device with the mobile terminal under its jurisdiction as shown in the following (a) and (b), and the above-mentioned associating method is only an example.

(A) Assigning each cluster number so that the result of performing a predetermined operation using each PS number as an operand is the home cluster number, and storing the predetermined arithmetic expression in each interconnect device. Let it. An interconnecting device that controls the mobile terminal may be specified from the stored arithmetic expression and the detected PS number. (B) A correspondence table that associates each PS number with its home cluster number is stored in each interconnection device. The cluster number associated with the PS number may be read out from this correspondence table as appropriate to specify the interconnecting device that controls the mobile terminal.

The interconnecting apparatus of cluster number 11 in FIG. 3 includes base stations of base station numbers (CS-ID) 23, 24 and 25. In the wireless area formed by these base stations, PS numbers 1101, 1102, 1203
Mobile terminals exist. Of these, PS numbers 1101, 1
Reference numeral 102 denotes a jurisdictional mobile terminal that inherits the cluster number 11 of the interconnecting device. I remember. In this figure, another mobile terminal having jurisdiction that inherits the interconnection device number 11 includes a mobile terminal with a PS number 1103 that is moving to an interconnection device with a cluster number 12. The interconnecting device with the cluster number 11 also stores the current position information, general paging area information, communication form information, communication partner, and address information of the mobile terminal with the PS number 1103.

The interconnection device having the cluster number 12 in FIG. 1 includes base stations having CS-IDs 26, 27 and 28. Mobile terminals with PS numbers 1201, 1202, and 1103 exist in a wireless area formed by these base stations. Among them, the PS numbers 1201 and 1202 are jurisdictional mobile terminals inheriting the cluster number 12 of the interconnecting device. The form information, the communication partner, and the address information are stored. In this figure, another mobile terminal having jurisdiction inheriting the cluster number 12 of the interconnecting device includes a mobile terminal having a PS number 1203 moving to the interconnecting device having the cluster number 11. Therefore, the interconnecting device having the cluster number 12 stores the current location information, general paging area information, communication form information, communication partner, and address information of the mobile terminal having the cluster number 1203.

Next, the processing of the interconnection device at the time of location registration will be roughly described with reference to the explanatory diagram of FIG. This description will be made in the order of the symbols in the figure. It is assumed that the mobile terminal having the PS number 1103 has registered its location in the base station of the interconnection device 12. At this time, the interconnecting device having the cluster number 12 specifies, from the PS number 1103, that the interconnecting device having jurisdiction over the mobile terminal is the interconnecting device having the cluster number 11 (to simplify the description, “ An interconnecting device that controls a mobile terminal is hereinafter referred to as a home interconnecting device.)

The interconnection device of cluster number 12 is PS
When the current location information of the mobile terminal with the number 1103 is stored,
The location information of the mobile terminal is transmitted to the home interconnection device 11. The interconnecting device of the cluster number 11 to which the position information of the PS number 1103 is notified stores these as the position information of the mobile terminal of the PS number 1103.

Next, a process in the case where mobile terminals make a call connection will be described with reference to the explanatory diagram of FIG.
FIG. 4 is an explanatory diagram showing how each interconnection device performs roaming management in the present embodiment, and the order of this process is indicated by a symbol. It is assumed that the mobile terminal having the PS number 1103 in the wireless area of the interconnecting apparatus having the cluster number 12 has transmitted a call setup message addressed to the mobile terminal having the PS number 1301 to the interconnecting apparatus having the cluster number 12.

At this time, the interconnection apparatus having the cluster number 12 registers the location of the mobile terminal of the request destination in its own apparatus from the PS number 1301 of the request destination (partner to be connected to) included in the call setup message. Is determined. If the location has not been registered, the request destination PS number specifies that the requested destination home interconnect device is the interconnect device of the cluster number 13. When specified in this way, the connection is established with the interconnection device of cluster number 13.

The interconnection device of the cluster number 13 is PS
The paging area information of the mobile terminal having the number 1301 is notified to the interconnecting apparatus having the cluster number 12. The paging area information indicates the interconnecting device of the cluster number 11. Therefore, the interconnecting device having the cluster number 12 is connected to the interconnecting device having the cluster number 11, and notifies the interconnecting device having the cluster number 11 of an incoming call to the mobile terminal having the PS number 1301.

After the notification of the incoming call, when the interconnecting device having the cluster number 11 establishes a wireless channel with the mobile terminal having the PS number 1301, the interconnecting device having the cluster number 11 transmits to the interconnecting device having the cluster number 13 The communication mode information and the communication partner of the mobile terminal having the PS number 1301 are registered. The interconnecting device having the cluster number 12 registers the communication mode information and the communication partner of the mobile terminal having the PS number 1103 with the interconnecting device having the cluster number 11.

Next, the processing when the mobile terminal performs a handover will be described with reference to the explanatory diagram of FIG. FIG. 5 is an explanatory diagram showing how each interconnect device performs roaming management in the present embodiment, and the order of this process is indicated by a symbol. PS number 1202 communicating with the mobile terminal having PS number 1301
Is assumed to have moved from the cluster number 12 to the wireless area of the interconnect device having the cluster number 11.

[0027] The interconnecting apparatus of cluster number 11 that has detected its own entry into the wireless area by receiving the call setup message requesting reconnection, determines from its PS number 1202 that its home interconnecting apparatus has cluster number 12. Identify that there is. The interconnecting apparatus having the cluster number 11 requests the home interconnecting apparatus having the cluster number 12 to notify the PS number of the communication partner having the PS number 1202.

From the notified PS number, it is determined that the communication partner is the mobile terminal with PS number 1301. After the determination of the communication partner, the communication apparatus establishes communication with the mobile terminal 1301 by inquiring the interconnection device of the cluster number 13 that is the home of the PS number 1301 about the location information of the mobile terminal of the PS number 1301.

Next, the internal configuration of the interconnection device will be described with reference to the functional block diagram of FIG. FIG.
Expresses the internal configuration of the interconnection device by functional blocks. As shown in FIG.
Are a logical line control unit 1, a cluster number storage unit 2, a position information storage unit 3, an address information storage unit 4, an information exchange unit 6, a wireless communication control unit 9, a wireless interface card 30, an IS
DN / PSTN interface card 31, ISDN / PSTN communication control unit 32, Ethernet card 34, LAN communication control unit 35, Internet connection unit 37, handover notification transmission unit 38, handover notification reception unit 39, process management unit 40, communication It comprises a form holding unit 41 and application units 42 and 43.

In this figure, the wireless communication control unit 9 and the ISDN / PST
The N communication control unit 32 and the LAN communication control unit 35 are respectively located in the same layer, and the logical line control unit 1 is located in an upper layer. An Internet connection unit 37 exists in an upper layer of the logical line control unit 1. The application units 42 and 43
It is positioned above the logical line control unit 1 and can communicate with a mobile terminal via an API (application program interface). In addition, a TCP / IP communication module 45 is provided above the Internet connection unit 37.
There is also an application unit 44 positioned above the TCP / IP communication module 45. For example, application programs on the Internet such as ftp (file transfer), telnet (remote terminal), WWW (World Wide Web), and the like.

The logical line control unit 1 sets a logical line over a plurality of interconnecting devices via various communication cards, and on the logical line, a line type and a transfer type indicated in communication form information described later. , Data link type and communication type. Line type is PHS, ISDN, P
STN etc., the transfer type is byte stream format,
There are a basic frame format, an Ethernet frame format, and the like. Data link types include data link protocols such as LAPDC, LAPR, and HDLC, and communication types include ADPCM voice communication, 32 Kbps unrestricted digital communication, 64 Kbps unrestricted digital communication, 32 Kbps × 2 unrestricted digital communication . The logical line controller 1 performs data transmission under any of these conditions, and performs logical call control in this data transmission. The logical line is composed of a logical line between the mobile terminal device and the interconnecting device, and a logical line between the interconnecting device and the application program, and data flowing on the logical line between the interconnecting device and the application program is other. Has a structure including data flowing on the logical line and identification information that can be identified. The logical line control unit 1 controls the logical lines between a plurality of mobile terminals and applications at the same time by referring to this structure.

The cluster number holding unit 2 stores the cluster number of the interconnecting device in association with the address value in the address system. The address system includes telephone numbers, PS
There are a number, a MAC address, an IP address, and the like. When they are interconnected via the Internet, the address of the interconnecting device is represented by an IP address, which is an Internet address system. The address value is expressed by a telephone number assigned in a public network when connected to each other by PSTN and ISDN, and by an extension telephone number assigned in the premises when connected to each other by a PBX. However, if it is connected via an external line even if it is connected to the PBX, it will be a public network telephone number or a public network telephone number + extension telephone number.

The position information holding unit 3 holds current position information in association with the PS number of the mobile terminal device. Here, the current position information held by the position information holding unit 3 includes:
It is classified into three types. The first type of the three types is the current location information of the mobile terminal under its jurisdiction, that is, the mobile terminal having its own device as a home. The second type is the current location information of the visitor's mobile terminal device. A visitor's mobile terminal is a mobile terminal having another device as a home and whose location has been registered in its own wireless area. The third type is current position information indicating the current position immediately before the mobile terminal having its own device as the home.

FIG. 6A shows an example of how the position information holding unit 3 holds the current position information. FIG.
In (a), the current position information a81 belongs to the first type and the current position information a82 belongs to the second type. The current position information a83 belongs to the third type. The format of the current location information is common to the first, second, and third types, and includes a PS number, a cluster number of an interconnecting device in which a mobile terminal of the PS number is located, and a mobile terminal of the PS number. And the line number in the interface card. “Interface card to which a mobile terminal belongs” is an expression for convenience of description, and in this specification, means an interface card to which the mobile terminal is connected. That is, when the mobile terminal has registered its position in the self-operated base stations 23, 24, and 25, it refers to the wireless communication interface card, and the current position information includes the card number of the slot in which the wireless communication interface card is installed. . When the mobile terminal has registered its location in the public base station 7, it refers to the ISDN / PSTN interface card 31 connected to the PSTN network, and the current location information includes the card number of the slot in which this interface card is installed. Is included. Further, when the mobile terminal is connected to the Ethernet LAN, it refers to the LAN interface card 34, and the current position information includes the card number of the slot in which the LAN interface card is installed.

As shown in FIG. 6 (b), the location information holding unit 3 associates the paging area information with the PS number of the mobile terminal device having its own home as well as the current location information. And holding. The paging area information includes the address of the interconnection device and the card information of the interface card to which the mobile terminal of the PS number belongs.

The card information on the interface card is information expressing where a general call should be made when there is an incoming call to the mobile terminal under its control in its own device. The mobile terminal under control is a self-operated base station 23, 24, 25
When the location is registered with the base station, the base station can make a paging call to these base stations, and the card information is represented by a CS-ID unique to the base station that specifies the base station.
If the mobile terminal has registered with the public base station 7, the public base station may be made to make a paging call. Therefore, the card information is obtained by the telephone number assigned to the mobile terminal by the public service provider. Is represented. Further, when the mobile terminal is connected to the Ethernet LAN, the card information is represented by an IP address in the Ethernet LAN.

In FIG. 6B, the position information holding unit 3 in the interconnecting apparatus having the cluster number 11 stores numbers 1101, 1102, and 1103 located in the wireless area of the own apparatus.
Of the current mobile terminal and the previous current position information of the mobile terminal. Further, it stores the current location information of the mobile terminal 1203 controlled by the interconnection device of the cluster number 12.

In FIG. 6 (b), the location information holding unit 3 in the interconnecting apparatus having the cluster number 11 stores the general paging area information and the authentication information of the mobile terminals having the numbers 1101, 1102, and 1103 under the control of the own apparatus. , The interconnecting device of the cluster number 12 is the PS number 12
01, 1202, and 1203, the paging area information and the authentication information are stored.

The interconnecting device of the cluster 11 holds up to the base station number (CSID) for the number 1203 controlled by the other device if the paging area is within the interconnecting device of the cluster number 11. When the paging area is within the interconnecting apparatus having the cluster number 12, only the cluster number 12 is held. While the current position information and the paging area information are stored, the position information holding unit 3 updates the current position information and the paging area information. This update work is roughly divided into the following (a-1), (a-2), (a-3) and (a-4).

(A-1) When a location registration sequence for a mobile terminal of another device is performed in its own wireless area,
The location information holding unit 3 specifies the address of the home interconnecting device by using the PS number of the mobile terminal device as a key, and refers to the authentication key to the home interconnecting device via the information exchange unit 6; Perform the location registration procedure in place of the home interconnection device. The home interconnecting device updates the obtained current location information and paging area information of the mobile terminal device.

(A-2) When a reference request such as an authentication key is transmitted for the mobile terminal of the own device, information is provided,
The location information holding unit 3 of the home interconnecting apparatus 13 receives the current location information of the mobile terminal apparatus and the paging area information. Through the processes (a-1) to (a-2), the location of the mobile terminal is transmitted to the home side, regardless of the interconnection device. (a-3) When the mobile terminal of the own device registers its position in the public base station of the public network, the position information holding unit 3 associates the telephone number assigned in the public service with the PS number of the mobile terminal. register.

(A-4) The mobile terminal of the own device is an Ethernet LAN
When the mobile terminal is connected, the IP address in the Ethernet LAN is obtained and registered in association with the PS number of the mobile terminal. The address information holding unit 4 includes, as shown in FIG.
It holds the address information of the mobile terminal of another device whose location is registered. The address information is information for associating a PS number with an Internet address (IP) address, and virtually moves a physical address (MAC address) used to uniquely identify a node on a LAN. Assigned to the terminal, its MAC address and its mobile terminal
It is composed of an IP address for connecting to N and a PS number. Note that the PS number may be a pointer to information on the PS.

The reason that the MAC address is associated with the PS number is that, for example, Netware (SPX / IP
X) Intended to interconnect with networks other than TCP / IP, such as X). The communication form holding unit 5 holds the communication form information of the mobile terminal and the PS number of the communication partner of the communication of the mobile terminal in association with the PS number of the mobile terminal under its control. FIG. 7 shows an example of the contents held by the communication mode holding unit 5. FIG. 7 is a table showing an example of the contents of the communication mode information held by the communication mode holding unit 5 in a table format. As shown in FIG. 7, the communication mode information includes a line type field,
There are a transfer type field, a data link type field, a communication type field, and the like. PHS, ISDN, PSTN, and the like are set in the line type field. In the transfer type field, byte stream format, basic frame format, Et
Hernet frame format etc. are set. Here, the basic frame format is a frame format used by a mobile terminal performing data transmission by a non-IP-IP service described later. In the data link type field, a data link protocol such as LAPDC, LAPR, or HDLC is set. In the communication type field, ADPCM voice communication, 32 Kbps unlimited digital communication, 64 Kbps unlimited digital communication, 32 Kbps × 2 unlimited digital communication, and the like are set. The communication partner is information for identifying the communication partner of the mobile communication terminal, regardless of whether it is under jurisdiction, and is represented by a PS number or SAP (SAP will be described later).

In FIG. 7, the communication mode holding unit 5 of the interconnecting apparatus having the cluster number 11 stores the number 11
01, 1102, and 1103, communication mode information of mobile terminals;
The communication partner of the interconnecting device having the cluster number 12 stores the communication partner, and stores the PS number 1201,
The communication mode information and the communication partner of the mobile terminals 1202 and 1203 are stored.

When the responsible mobile terminal is handed over by another interconnecting device, the communication mode holding unit 5 receives a communication partner and communication mode information about the mobile terminal from the interconnecting device, and receives the registration notification. The information stored in the communication mode storage unit 5 is updated. The communication mode information registered in this manner is hereinafter referred to by the interconnecting device that has detected the handover of the mobile terminal. The interconnecting device that detects the handover restores the line so that the communication mode before the handover obtained by this reference can be reproduced.

The information exchange section 6 exchanges position information and address information between interconnecting devices. The wireless interface card 30 includes firmware for realizing the layer 1 function of the RCRSTD-28 standard, and functions as an interface with a base station. The wireless communication control unit 9
(Personal Handy phone System) performs communication control specified by RT (wireless management) specified by layer 3 and CC (call control).

ISDN / PSTN interface card 31
Includes a telephone terminal, a communication server, and a public base station 7.
Connect to ISDN and PSTN networks. The ISDN or PSTN communication control unit 32 has a function of controlling the ISDN / PSTN interface card 31 and setting a circuit-switched path on a circuit-switched network. Wireless communication interface card 30
When the mobile terminal connected to the terminal transmits a connection request in which the outside telephone number is specified as the connection destination, the logical line control unit 1 transmits data between the wireless communication control unit 9 and the ISDN / PSTN communication control unit 32. Establish a line to exchange

The Ethernet card 34 connects to an Ethernet LAN. The LAN communication control unit 35 includes a LAN driver and a “LAN server” that provides a service in which a terminal on a LAN or the Internet and a mobile terminal device communicate with each other. About LAN driver,
The known components are applied. "LA
The “N server” exchanges an Ethernet frame with the mobile terminal, and sends out to the LAN side and receives from the LAN side.

The Internet connection unit 37 generates a server process “non-IP-IP server” for providing a non-IP-IP connection service, and specifies a communication protocol required for Internet connection at a mobile terminal or a terminal on a circuit switching network. Connect a terminal that is not installed to a server on the Internet. The non-IP-IP server is created to provide a non-IP-IP connection service. A non-IP-IP connection service is
If the requesting mobile terminal does not have a communication program for TCP / IP, but wants to connect to the server based on the TCP / IP procedure, mediate frame assembly and disassembly on the interconnecting device side. It is. When the non-IP-IP communication service request is transmitted, a packet is assembled from the byte stream transmitted from the wireless line established by the wireless communication control unit 9 and the packet is transmitted to the LAN via the Ethernet card 34 inserted in the card slot. And the received packet transmitted from the LAN is decomposed into a byte stream and transmitted over a wireless line (non-IP-
An IP server can be viewed as one of the application programs already mentioned. ).

The handover notification transmitting section 38 detects a handover due to the mobile terminal having entered the wireless area of the own apparatus, and forms an interconnecting apparatus for forming the wireless area where the entering mobile terminal was located up to then. Send handover notification to. The handover receiving unit 39
When a mobile terminal that has been located in the wireless area of its own device has left the wireless area of another interconnecting device and a handover notification has been sent from the interconnecting device to which it has been moved, the mobile terminal has moved away. Disconnect the line that the terminal was using.

The mobile terminal devices 1101 and 1102 have a PH
A mobile phone type handset having layer 1 to layer 3 functions as a mobile terminal of S, or an electronic organizer or laptop type personal computer equipped with a wireless communication interface card having layer 1 to layer 3 functions It is. The mobile terminal performs wireless communication by having the interconnecting device provide a wireless line with these wireless communication interface cards. FIG. 30 shows the format of the call setup message in the present embodiment. FIG. 30 is a diagram showing a format of a call setup message issued by a mobile terminal according to the present embodiment. The call setup message issued by the mobile terminal is shown in FIG.
0, a transmission capability field, a content information length field, a calling number field in which the PS number of the source mobile terminal is described, a content length field indicating the content length of the calling number, and a transmission destination field Mobile terminal P
The destination number field includes an S number, a content length field indicating the content length of the destination number, and a destination subaddress field. If TCP / IP is implemented on the mobile terminal, the destination subaddress of the call
Set the connection service and the IP address of the connection destination node.

If TCP / IP is not implemented on the mobile terminal side, the requesting mobile terminal device does not implement TCP / IP but indicates that it wants to connect to a server operating on IP.
-Specifying "IP connection service", specifying the IP address and port number of the request destination application, whether to connect with TCP
Specify whether to connect using DP (UDP specification is not explained). For "LAN connection service", "Non-IP
The “IP connection service” also specifies the request destination by the IP address specified in the destination subaddress field by setting “0” as the transmission destination of the connection request.

The process management unit 40 sends the application, the wireless communication control unit 9 and the logical line control unit 1 to the SAP.
(Service access point). SA
P is information that logically indicates a reference point of the communication service.
In the present embodiment, SAP is used to indicate the end points on both sides of the control path and the data path. The control path is a path provided on the bus for transmitting control information between the communication interface card and the wireless communication control unit 9.

The assignment of the SAP is performed by the radio communication control unit 9,
This is performed by the logical line control unit 1 and the application transmitting the SAP select to the process management unit 40. The SAP select includes elements such as a pair of a PS number or an IP address and a port number, and the process management unit 40
Generates SAP information from the SAP information registered from each unit or the information described in the configuration file, and establishes a control path or a data path. It should be noted that the process management unit 40 stores the elements in the SAP select, the current position information held in the position information holding unit 3,
The control path or the data path may be established based on the card number included in the paging area information, the mounting state of the card slot described in the configuration file, and the like.

Referring to the explanatory diagram of FIG. 9A and the flowchart of FIG. 12, an operation example in the case of performing voice communication between the mobile terminal device 1301 and the mobile terminal device 1201 will be described. . FIG. 9A shows a connection mode between the interconnecting apparatus and the mobile terminal apparatus according to the present embodiment when mobile terminal apparatus 1301 communicates with mobile terminal apparatus 1201. FIG.
In (a), the home interconnecting device 13 that manages the location information and the like of the mobile terminal device 1301, the home interconnecting device 12 that manages the location information and the like of the mobile terminal device 1201, and the mobile terminal device 1301 are currently connected. The interconnecting device 11 and the mobile terminal device 1201 are the interconnecting device 14 currently connected. FIG. 12 is a flowchart showing the processing of the position information holding unit 3 at the time of position registration, and each step is denoted by a capital letter "F".

First, the mobile terminal devices 1301 and 1301
No. 01 performs location registration with the self-operating base station to which each is currently connected. The location registration sequence is executed between the wireless communication control unit 9 of the interconnection device 11 and the mobile terminal device 1301 and between the wireless communication control unit 9 of the interconnection device 14 and the mobile terminal device 1201. Upon receiving the first protocol message of the location registration sequence from the mobile terminal device 1301, the wireless communication control unit 9 of the interconnection device 11 notifies the location information holding unit 3 of the message.

On the other hand, the position information holding unit 3 performs steps F1 to
Steps F2 and F9 are repeated. In step F1, it is determined whether or not the position registration sequence has started in the wireless area of the own device (whether a position registration request message has been received from the mobile terminal). If so, the process proceeds to step F4, and if not, the process proceeds to step F2.
In step F2, it is determined whether a reference request for the mobile terminal of the own device has been received. The reference request here is a request for referring to the current position information, the paging area information, the authentication key, and the like. In step F9, the mobile terminal waits for a position information notification about the mobile terminal of the own device to be transmitted. If received, step F9 to step F8
Move to. While waiting for reception, steps F1 to F2, F
Repeat step 9.

When the start of the location registration sequence is notified from the mobile terminal 1301 by a location registration request to the wireless communication control unit 9 of the interconnecting apparatus 11, the process proceeds from step F1 to step F4. The information holding unit 3 specifies the address of the home interconnecting device using the PS number of the mobile terminal device as a key. Here, the location information holding unit 3 obtains the address of the home interconnecting apparatus 13 by using the PS number 13 of the mobile terminal apparatus 1301 requesting the location registration sequence as a key.

When specified as the home interconnection device 13,
In step F11, it is determined whether the home is the own device. If the interconnecting device is the home interconnecting device 13, the process proceeds to step F13.
Move to 2. In step F12, a logical line with the home switching device is established. In step F5, the location information holding unit 3 refers to the information exchange unit of the home interconnecting device 13 via the information exchange unit, such as the current location information, the paging area information, and the authentication key of the mobile terminal device 1301. To send a reference request.

After the transmission, in step F6, an answer to the reference request is awaited. While waiting for the answer, step F6 is repeated. If there is an answer, the process proceeds from step F6 to step F15, where the location information holding unit 3 authenticates the mobile terminal device 1301 using the obtained authentication key, It causes the wireless communication control unit 9 to execute a location registration sequence. Upon obtaining the paging area information for calling the mobile terminal device 1301 in the location registration sequence, the wireless communication control unit 9 of the interconnecting device 11 informs that it is currently under the control of the interconnecting device 11. In step F7, the home interconnecting device 1 is
3 to the location information notification.

In step F2, the interconnecting apparatus 13 waits for reception of a reference request for its own mobile terminal. While waiting for reception, steps F1 and F2 are repeated, and if received, the process proceeds from step F2 to step F8. In step F8, the home interconnection device 1
3 from the location information holding unit 3, the current location information of the mobile terminal device 1301, paging area information,
The information such as the authentication key is extracted and transmitted to the interconnecting apparatus 11 that has requested the mobile terminal 1301 under the control of the mobile terminal 1301.
In step F10, the interconnection device 13 registers the notified location information as the location information of the mobile terminal 1301.

[0062] By such registration, the location of the mobile terminal is reported to the home side, regardless of which interconnection device is under the control of the interconnection device. Therefore, when each interconnection device receives a request for a call connection to a mobile terminal, it can know which base station should request a simultaneous call. When you receive your location information,
The home interconnecting device 13 returns a response to the interconnecting device 11 where the mobile terminal 1301 is present. Interconnection device 11
Receives the response and completes the location registration sequence.

If the mobile terminal whose location has been registered is the mobile terminal under jurisdiction, the flow shifts from step F11 to step F13 to read the authentication information from the position information holding unit and perform authentication. After execution of step F13, the process proceeds to step F14. In step F14, the current position and the address of the own device are written to the position information holding unit 3 as paging area information.

[0086] Also for the location registration from the mobile terminal device 1201, the interconnection device 14 performs the same processing as the mobile terminal device 1301. The location information of the mobile terminal device 1201 is registered in the home interconnecting device 12 of the mobile terminal device 1201. Note that the mobile terminal device 1201 may also be registered in the position information holding unit of the interconnecting device 14 to which the mobile terminal device 1201 is currently connected.

Next, the transmitting side mobile terminal-radio communication control unit 9
RCR between the called mobile terminal and the wireless communication control unit 9
-The CC and RT messages specified in STD28 are described below. -CC call setup message At the start of the call setup process, it is transmitted from the originating mobile terminal to the base station. It is transmitted from the base station to the receiving mobile terminal. -CC call setup acceptance message This message indicates that the requested call setup process has started, and is sent from the originating mobile terminal to the base station. -CC response message This message indicates that the call has been established. The message is transmitted from the called mobile terminal to the base station, between the base station and the wireless communication control unit 9, and from the base station to the calling mobile terminal. -Pch incoming call message Using the paging channel, the base station notifies the mobile terminal that there is an incoming call. The paging channel is a channel that is obliged to monitor the PS number assigned to the own station in the standby state. -RT incoming call response message Sent from the originating mobile terminal to the base station in order for the originating mobile terminal to respond to the incoming call from the base station. • CC paging message Transferred from the terminating mobile terminal to the base station to indicate that the terminating mobile terminal is ringing. The base station transfers the call to the originating mobile terminal and notifies the called side that the call is being made.

In this embodiment, an extended primitive is provided in addition to these CC and RT messages. FIG.
(A) is a list of examples of extended primitives in the interconnection device of the present invention. Extended primitives according to the present embodiment include an individual arrival notification primitive 51 and an incoming call response primitive 52. The individual arrival notification primitive 51 is a message transmitted from the logical channel control unit 1 to the wireless communication control unit 9, and means to instruct transmission of the Pch call message to a designated PS number.

The incoming call response primitive 52 is a message transmitted from the radio communication control unit 9 to the logical line control unit 1, and is a response message to the individual incoming call notification primitive 51. The wireless communication control unit 9 notifies the logical line control unit 1 that the "RT incoming call response message" has been received from the mobile terminal by using the incoming call response primitive 52.

FIG. 10B shows a list of example protocol messages between the interconnecting devices. As shown in the figure, examples of protocol messages between interconnecting devices include a connection request message 61, an incoming response message 62, a connection response message 63, a disconnection request message 64, a disconnection response message 65, a connection rejection message 66, a reconnection. There are a request message 67, a reconnection response message 68, a reconnection rejection message 69, a call message 70, a handover notification message 71, and an additional information message 72. All the messages shown in FIG. 10B share the format of FIG. This format includes a message overall length field, a source part ID field, a destination part ID field, a message type field, an extended header length field, a message correspondence identifier field, a result / reason field, and a connection handle field. , A communication service designation field, a destination address field, a source address field, a destination sub-address field, an additional information number field, and additional information 1, 2, 3,... N fields. The communication service information field includes a line type field, a mobility field, a mobile terminal-base station data link type field, and a communication type field. The destination address field and the source address field include an address length field, an address family field, and an address value field. If a primitive identifier described later is written in the additional information field, the logical circuit control unit 1 can send the primitive received from the upper layer or the lower layer to another interconnecting device.

In FIG. 10B, a connection request message 61 is a message for requesting a connection between the logical line controllers 1. In the message correspondence identifier field in the format of FIG. 11, an identifier for setting the correspondence between the request source and the response message is set. The source address and destination address fields include the address of the request source and the address of the request destination. In the additional information field, the content of the CC call setting display primitive can be specified.

The incoming call response message 62 is a message corresponding to the connection request message 61, and notifies the requesting interconnecting device that the mobile terminal of the connection destination has responded to the incoming call. This message notifies SAP information necessary for establishing a data path. In the additional information field, the content of the CC call setting acceptance display primitive can be specified.

The connection response message 63 indicates that the establishment of the data path between the connection source mobile terminal and the connection destination mobile terminal has been completed and that the CC response message has been received from the connection destination mobile terminal. This message is notified from the logical line control unit 1 of the device to the logical line control unit 1 of the interconnecting device that is the connection source. In the additional information field, the content of the CC call setting confirmation primitive can be specified.

The disconnection request message 64 is a message requesting disconnection. In the message correspondence identifier field in the format of FIG. 11, an identifier for setting the correspondence between the request source and the response message is set. The content of the CC disconnection request primitive can be added to the additional information field. The disconnection response message 65 is a response message corresponding to the disconnection request message. The message correspondence identifier included in the corresponding disconnection request message is written in the message correspondence identifier field in the format of FIG.

The connection refusal message 66 is a response message corresponding to the connection request message when the connection is rejected. The message correspondence identifier included in the corresponding connection request message is written in the message correspondence identifier field in the format of FIG. The content of the CC call setting confirmation primitive can be added to the additional information field.

The reconnection request message 67 is a message for requesting reconnection at the time of handover. In this message, in the message correspondence identifier field in the format of FIG. 11, an identifier for setting the correspondence between the request source and the response message is set. The source address and destination address fields include the address of the request source and the address of the request destination. In the communication service field, information on the communication service supplied before the handover is written. The content of the CC call setting display primitive can be added to the additional information field.

The reconnection response message 68 is a response message to the reconnection request message when the reconnection is completed. In this message, the message correspondence identifier included in the corresponding reconnection request message is written in the message correspondence identifier field in the format of FIG. The content of the CC call setting confirmation primitive can be added to the additional information field.

The reconnection rejection message 69 is a response message to the reconnection request message when reconnection is rejected. In this message, the message correspondence identifier field in the format of FIG.
The message correspondence identifier included in the corresponding connection request message is written. The content of the CC call setting confirmation primitive can be added to the additional information field.

<Mobile terminal device 1301-Mobile terminal device 1
Voice Communication Between 201> A case where the mobile terminal apparatus 1301 and the mobile terminal apparatus 1201 perform voice communication will be described. In voice communication, a real-time communication service must be provided between mobile terminals at both a connection source and a connection destination. Therefore, the data path is set on the IP link between the interconnect devices, and the interconnect device emulates the circuit switching function. Thereby, the mobile terminal device 1301
The mobile terminal device 1201 and the mobile terminal device 1201 are connected by a virtual line. The form of the line for performing voice communication is shown below.

<< Voice Communication Mode >> Circuit Connection (ADPCM) Mobile Terminal Device 1301 ----- Interconnecting Device 11 Data Path Interconnecting Device 11 ------------- Interconnecting Device 14 Established by IP Protocol Connection Line connection (ADPCM) Interconnection device 14 Mobile terminal device 1201 <Data communication between mobile terminal device 1301 and mobile terminal device 1201> Next, mobile terminal device 1301 and mobile terminal device 1
The case where the data communication is performed by the user 201 will be described. In this data communication, a transmission control procedure called LAPDC is applied. LAPDC stands for OSI (Open System Interco
nnection: Open system interconnection) In the reference model, it is a communication protocol equivalent to layer 2 and HDL
A subset of C (High-Level Data Link Control Procedure) is used. In the transmission of non-voice data using such a communication protocol, the reliability of data transmission / reception can be further ensured. This is because if the above-described LAPDC or HDLC is applied, when a transmission error occurs, the transmission error can be overcome by the error correction function and the retransmission control function.

The transmission control procedure is applied to the transmission and reception of non-voice data in the following manner. Since the main body of the mobile terminal is portable, it moves between a place with good radio wave conditions and a place with bad radio wave condition by being carried. The place where the radio wave condition is bad is, for example, a place where wireless zones of a plurality of base stations interfere, a place where a direct wave interferes with an indirect wave due to reflection of a building or the like. As described above, the mobile terminal of the communication system is carried to various places, so that the transmission error rate of wireless transmission is much higher than that of wired transmission. In the case of transmitting and receiving voice data, even if a bit error occurs in the voice data due to a transmission error, the human ear often hardly recognizes it. However, if garbled bits occur in the transmission and reception of non-voice data, the non-voice data cannot be restored by the receiving side mobile terminal due to that. Since the transmission of non-voice data is greatly affected by garbled bits, the mobile terminal applies the transmission control procedure at the same time as the start of transmission of non-voice data, thereby ensuring the reliability of transmission and reception of non-voice data.

In the application mode of the transmission control procedure in the case of performing data communication, first, as in the case of the voice communication described above, a line is connected between interconnecting apparatuses, and the mobile terminal apparatus 13 is connected.
01 and the mobile terminal device 1201 execute a transmission control procedure via a data link to perform data communication (data communication mode A). << Data communication mode A >> Line connection Interconnecting device 11 -------- Interconnecting device 14 Data link Mobile terminal device 1301 ---------- Mobile terminal device 1201 The other is a mobile terminal device 1301 and interconnection device 11
A data link is set up between the mobile terminal device 1201 and the interconnecting device 14 and a transmission control procedure is executed. The interconnecting devices 13 and 14 are connected between the interconnecting devices by the logical data path described above. This is a mode (data communication mode B) in which data is relayed between them.

<< Data Communication Form B >> Data Link Mobile Terminal Device 1301 ----- Interconnect Device 11 Data Path Interconnect Device 11 --- Interconnect Device 14 Established by IP Protocol Routing In the case of the data communication mode A, in the interconnecting device,
The sequence is the same except that voice ADPCM is set for voice communication and unrestricted digital is set for data communication.

Data communication mode B is applied, for example, when mobile terminal apparatus 1301 and mobile terminal apparatus 1201 perform IP communication. In this case, the mobile terminal device 1301
Alternatively, the other party that establishes a call with the mobile terminal device 1201 is an interconnection device. The interconnecting devices are interconnected by routing according to a protocol such as IP. FIG.
(C) shows a list of interface examples with the application programs in the interconnecting device. Communication between the logical line control unit 1 and its upper layer is performed by a connection instruction primitive 7
3, the incoming response primitive 74, the connection confirmation primitive 75, the incoming notification primitive 76, the incoming instruction primitive 77, the incoming confirmation primitive 78, the disconnect instruction primitive 79, the disconnect confirmation primitive 80, the disconnect notification primitive 81, and the additional information primitive 82 . All of the messages shown in FIG.
Format is shared.

The connection instruction primitive 73 is an application key.
Instruct connection to the logical line control unit 1 from the application. The originating address and the destination address specify the addresses of the calling side and the called side, respectively. In the additional information field, the content of the CC call setting request primitive can be specified. The incoming response primitive 74 is a connection instruction primitive 7
A primitive corresponding to 3 that notifies the requesting application that the mobile terminal of the connection destination has responded to the incoming call, followed by the SAP information necessary for establishing the data path Primitive. In the additional information field, the content of the CC call setting acceptance display primitive can be specified.

The connection confirmation primitive 75 is a response primitive corresponding to the connection instruction primitive. In the connection confirmation primitive, an identifier for setting the correspondence with the confirmation message by the request source is set in the message correspondence identifier field. The connection handle field contains
Connection information on the control path and the data path for which connection has been completed is written. In the additional information field, the content of the CC call setup completion request primitive can be specified.

The incoming call notification primitive 76 is a message for the logical circuit control unit 1 to notify the application of the incoming call when the mobile terminal makes a call to the application. The contents of the call setting display primitive can be specified in the additional information field of the incoming call notification message. The incoming call instruction primitive 77 is a primitive indicating whether or not the application accepts the incoming call notification primitive 76 notified from the logical line control unit 1. The connection handle field contains
SAP information for setting a data path between the application program and the logical line control unit 1 is set. In the additional information field, the content of the CC call setting acceptance request primitive can be specified.

The incoming confirmation primitive 78 is an application
Is a response primitive to the incoming call indication primitive issued to the logical line control unit 1, and when the call connection is completed, SAP information of the data path and the control path is written in the connection handle field. In the message correspondence identifier field, a message correspondence identifier specified by the incoming call indication primitive can be specified. In the additional information field, the content of the CC call setup response primitive can be specified.

The disconnect instruction primitive 79 is a primitive for instructing the interconnection device to disconnect. The message correspondence identifier field describes an identifier for the requester to establish a correspondence with the response message, and the line to be disconnected is specified by the connection handle field. In the additional information field, the content of the CC disconnect request primitive can be specified.

The disconnect confirmation primitive 80 is a response primitive corresponding to the disconnect instruction primitive, and is a primitive for setting the timing at which the application closes the file descriptor of the data path. The message correspondence identifier field describes the message correspondence identifier specified in the disconnection instruction message. The disconnection notification primitive 81 is a message for notifying disconnection from the interconnecting device, and the disconnected line is specified by the connection handle field. In the additional information field, the content of the CC disconnection display primitive is set.

The application uses the logical line control unit using Socket on UNIX. Application is UN
Generate Socket on IXware, and from there TCP of external endpoint
Once the connection is established, the data stream can be sent over the connection using the write command. On the other hand, a data stream can be received via the connection using the read command. Applications include answering machine, e-mail, Telnet, FTP, WWW, etc., and any of these is specified by the port number. A terminal desiring communication with an application specifies an IP address and SAP information indicating a port number for specifying the application in a call setting request message, and establishes a connection with the application.

<Library to be supplied to application> PHS, ISDN, PSTN
The libraries shown in FIGS. 31 to 32 are provided for applications in order to make outgoing and incoming calls by telephone numbers to terminals connected to the like. In FIG. 31A, VC_init () establishes a control path.

In FIG. 31B, VC_set_dpath ()
Establishes a data path from the connection handle obtained on the outgoing or incoming call. In FIG. 31 (c), a function VC_call establishes a call by designating a request destination telephone number. Set the data path using the connection handle returned upon successful completion.
In FIG. 31D, the function VC_listen waits for an incoming call, and returns when an incoming request is received or a timeout occurs. If an incoming request is received, the requested communication service quality is returned.

In FIG. 31 (e), VC_create_sap ()
Generates and registers SAP. In FIG. 31 (f), VC_accept () specifies the incoming connection handle received in VC_listen and establishes a call with the request source. FIG. 32 (a)
In, VC_rcv_prim_callind () analyzes the incoming call notification primitive received by the logical line control unit 1 and acquires a connection handle.

In FIG. 32B, VC_snd_prim_call
When the application receives an incoming call received by the incoming call notification primitive, rp () transmits an incoming call instruction primitive to the logical line control unit 1 by using this function. After executing this function, the application establishes a data path. In FIG. 32 (c), VC_snd_prim_connrq () specifies the PS number of the connection destination and the communication service, and
Request a connection from The issuer of this function waits for the reception of an incoming response from the logical line control unit 1.

In FIG. 32D, VC_rcv_prim_call
When ed () receives an incoming response primitive indicating that an incoming call response has been returned from the connection destination from the logical line control unit 1,
Analyze this and get the connection handle. In FIG. 9A, a mobile terminal device 1301 to a mobile terminal device 1201
The operation in which a call setting request for is issued will be described.

In FIG. 9A, it is assumed that the interconnecting device 11 and the mobile terminal device 1301 are connected via a private base station. Also, the interconnection device 14 and the mobile terminal device 1
It is also assumed that 201 is also connected via a private base station. The call setting request message from the mobile terminal device 1301 reaches the wireless communication control unit 9 via the private base station and the wireless interface card 30. Mobile terminal device 130
The protocol between the communication control unit 1 and the wireless communication control unit 9 is RCR-S
Complies with TD28.

The logical circuit control unit 1 determines from the call setup message that the service is a voice service and that the mobile terminal device 1201
To get the PS number. The logical line control unit 1 is a mobile terminal device 1
The general call area 201 is inquired to the position information holding unit 3. The location information holding unit 3 determines the home interconnecting device of the PS number as described above and refers to the location information. Since the connection destination is the mobile terminal device 1201, the home interconnection device is 12. The location information holding unit 3 of the interconnection device 11 uses the information exchange unit 6 to obtain the paging area and the current location of the mobile terminal device 1201 from the interconnection device 12. The current location is the address of the interconnecting device, the number of the communication card in the interconnecting device, and a unique ID that identifies the private base station if it is a wireless communication card and an interface card with the private company. Consists of

The paging area is composed of a plurality of pieces of information identical to the current location information. The interconnect device address is
When they are connected to each other via the Internet, they are specified by a telephone number when they are connected to each other via an IP address or ISDN or PBX. The interconnecting device of the connection destination obtained from the current position of the mobile terminal device 1201 thus obtained can be specified as the interconnecting device 12 in the present embodiment.

The logical line controller 1 of the interconnection device 11 generates a connection request message 61 from the call setup message,
The data is transmitted to the logical line control unit of the interconnection device 14. It is assumed that the private base station designated as the destination belongs only to the interconnection device 14 in the paging area. Interconnection device 1
4 receives the connection request message 61, creates the individual arrival notification primitive 51 and transmits it to the wireless communication control unit 9. The wireless communication control unit 9 calls the mobile communication device 1201 via the wireless interface card 30 and the private base station. Incoming call is RCR
Complies with STD-28.

When the mobile terminal device 1201 responds to the incoming call, the fact that the mobile terminal device 1201 has responded to the incoming call is notified from the radio communication control unit 9 to the logical line control unit 1 by the incoming call response primitive 52. The logical line control unit 1 that has received the incoming call response primitive 52 creates an incoming call response message 62 from the incoming call response primitive 52 and transmits it to the interconnection device 11. Upon receiving the incoming response message 62, the interconnecting device 11 establishes a connection between the mobile terminal device 1301 and the wireless interface card 30.
Set a data path for sending and receiving data between the devices.
The interconnecting device 14 that has transmitted the incoming response message 62 also sets a data path between the mobile terminal device 1201 and the wireless interface card.

Further, a data path is set between the interconnecting device 11 and the interconnecting device 14. As a result, a data path between the mobile terminal device 1301 and the mobile terminal device 1201 can be established and communication can be performed. Become. Specifically, when the interconnection device 11 and the interconnection device 14 are connected via ISDN or PSTN,
Open STN line.

In the case of connection by LAN, a path for logically passing data by TCP or UDP through LAN is established. Iso described in IEEE802.9a
In the case of via the chronous Ethernet,
A line can be established on the LAN. After the establishment of the data path is completed, the mobile terminal 120
1 or an application on the mobile terminal 1201 indicates an intention to respond by an off-hook operation or the like, a call setup response message is transmitted from the mobile terminal 1201 to the interconnection device 14, and a corresponding message is transmitted. The connection response message 63 from the logical line control unit 1 of the interconnection device 14
1 is transmitted to one logical line control unit 1. Interconnection device 11
Transmits the call setting response primitive defined by the RCR STD-28 primitive to the wireless communication control unit 9, and completes the establishment of the call to the mobile terminal device 1301 via the wireless interface card 30. A call setup response message indicating that the call has been made is transmitted. Thereby, the establishment of the call is completed, and thereafter, the mobile terminal 130
1 and the mobile terminal device 1201 can communicate with each other. At this time, the mobile terminal apparatus 1301 registers information such as the PS number of the connection destination node, the communication mode, and the communication service in the home interconnection apparatus 13 via the interconnection apparatus. Similarly, the mobile terminal device 1201 also registers with its home interconnect device 12 via the interconnect device 14. These pieces of information are released when the call is disconnected. The above operation sequence is expressed in detail as shown in FIG.

Next, an operation example in the case where the mobile terminal device shown in FIG. 9B moves from the currently connected interconnection device to the wireless communication area of another interconnection device during communication (handover) will be described. I do. Mobile terminal device 120
1 moves from the wireless communication area of the interconnecting device 14 currently connected to the wireless communication area of the interconnecting device 15.

The interconnection device 15 is a mobile terminal device 1201
It is detected from the message from that it has moved to the wireless area of the interconnecting device 15 during communication. Specifically, the mobile terminal apparatus 1201 may transmit a call setup message as a recall request, or may transmit a TCH switch request message. When the interconnecting device 15 detects that the mobile terminal device 1201 has moved to the wireless area, it identifies the home interconnecting device 12 from the PS number of the mobile terminal device 1201. The interconnection device 15 uses the information exchange unit 6 to
The mobile terminal device 1201 obtains information such as the PS number of the other party with which the mobile terminal device 1201 was communicating before moving, the communication mode, the communication service, etc.

As described in the operation example of the call connection of the voice communication, when the call is established, the connection partner of the call, the communication mode, and the like are registered in the home interconnection device of the mobile terminal device. The mobile terminal device 1201 specifies the home interconnecting device of the communication partner before the movement from the PS number of the communication partner before the movement. In the present embodiment, the communication partner of the mobile terminal device 1201 before moving is the mobile terminal device 1301, and the home interconnection device is 13. The interconnecting device 15 inquires of the location information holding unit 3 of the interconnecting device 13 about the current location of the mobile terminal device 1301. In the present embodiment, the current position of the mobile terminal device 1301 is:
It is in the wireless area of the interconnection device 11. In this way, the interconnecting device 15 is connected to the mobile terminal device 1 that has moved.
201 can be determined and the interconnection device 1
5 transmits a reconnection request message 67 to the interconnection device 11. The interconnection device 21 sends the reconnection request message 6
Upon receipt of 7, the call relating to the connection destination specified by the reconnection request message 67 is found from the calls already existing in the interconnecting device.

If found, the incoming response message 62 is transmitted to the interconnecting device 15 and the data path is reset using the logical line setting unit as indicated by the reconnection request message 67. In the present embodiment, the interconnection device 1
The data path set between the interconnection device 1 and the interconnection device 14 is changed between the interconnection device 11 and the interconnection device 15. The corresponding data path is also set on the interconnection device 15 side that has received the incoming response message 62, and the resetting of the data path is completed. When the data path reset is complete,
A reconnection response message 58 is transmitted from the interconnection device 11 to the interconnection device 15. Reconnection response message 68
Is received by the handover notification transmitting unit 13, the handover notification 71 is transmitted to the interconnecting device 14 before the mobile terminal device 1201 moves. Upon receiving the handover notification message 71, the handover receiving unit 14 of the interconnecting device 14 disconnects the wireless communication control unit 9 that has been used by the mobile terminal device 1201 before moving and that is no longer valid. Perform using. This completes the reconnection of the call and the data path due to the movement, and thereafter, the mobile terminal apparatus 1301 and the mobile terminal apparatus 1201 can communicate with each other. FIG. 26 shows a detailed sequence diagram of this operation.

Next, an example of the operation at the time of handover when performing data communication will be described. The operation in the data communication configuration A is the same as the operation example described in the previous section. In the operation in the data communication configuration B, a new call is set up with the destination interconnecting device without reconnecting to the interconnecting device before moving in order to enhance consistency with the specifications of the network layer such as IP. For the terminal side, execute the same protocol sequence as a normal handover,
The destination interconnecting device transmits the handover notification 71 to the interconnecting device before the movement, and disconnects only the wireless channel invalidated by the movement. This makes it possible to efficiently use a finite radio channel.

The following (1) to (3) list handover processing during data communication. ((1) When the mobile terminal changes the wireless area while the mobile terminal is performing non-IP communication), the interconnection device controlling the source mobile terminal of the reconnection request is determined, and the application of the connection partner is determined. Acquire specific information and communication form. The reconnection destination interconnecting device is specified from the acquired connection partner application specifying information, and reconnection is performed.

((2) When the radio area is changed while the mobile terminal is transmitting or receiving the IP packet) When a reconnection request transmitted from the mobile terminal that has moved to the radio area is received, the reconnection request is transmitted. From the requesting mobile terminal is IP
It is determined that transmission or reception of a packet is requested. If it is determined that the data is LAN connection data, a line is established between the mobile terminal and the interconnection device.

((3) When the mobile terminal moves and changes the wireless area while the mobile terminal is connected to the application program), the interconnection device that controls the mobile terminal that is the source of the reconnection request is determined, and the connection is established. Acquire the application identification information and communication form of the other party. Specify the reconnection destination interconnect device from the application identification information of the connection partner,
Reconnect.

An example of the operation when an application program is created on the interconnection device and the application program communicates with the mobile terminal device will be described. The application program and the logical line controller 1 of the interconnection device
Interface with primitive sets. First, an operation example when a call is made from an application program to a mobile terminal device will be described.

When a connection request including the PS number of the mobile terminal to be connected is received from the application program on the general device, if the mobile terminal to be connected to the line is the mobile terminal under its control, the logical line control The unit 1 refers to the position information holding unit 3 to obtain the current position of the mobile terminal. If the mobile terminal to be connected to the line is a mobile terminal under the jurisdiction of another device, if the current position of the mobile terminal exists in the position information holding unit 3, it is obtained.
If the mobile terminal to be connected to the line is a mobile terminal under the jurisdiction of another device, and the current position of the mobile terminal does not exist in the position information holding unit 3, the mobile terminal is controlled through a network, a line, or a bus. Establish a logical line with another device. The application program controls the logical line established in the application interface.

More specifically, the logical line control unit 1 of the application program and the interconnecting device establishes a connection for exchanging control information using, for example, a socket library, and connects the connection instruction primitive 73 to the logical line control unit 1. Send to Connection indication primitive 73
When the mobile terminal device designated by the above is in the wireless area of the interconnecting device, the mobile communication device connects to the target mobile terminal device using the wireless communication control unit 9. If it is not within the wireless area of the interconnecting device, the connection request message 61 is transmitted to the interconnecting device to which the target mobile terminal device is currently connected. The interconnecting device that has received the connection request message 61 thereafter performs the same operation as a voice call between mobile terminal devices spanning a plurality of interconnecting devices. Upon receiving the incoming response message 62, the interconnecting device on the transmission side of the connection request message 61 transmits an incoming response primitive 74 to the application program that made the request. The data path between the mobile terminal and the mobile terminal is set using the SAP (service access point) specified by the incoming call response primitive 74. Subsequently, the application program receives the connection confirmation primitive 75 and knows that the connection has been completed. In this way, it is possible to connect to the target mobile terminal device from the application program. FIG. 23 shows a detailed sequence of this operation.

Next, a description will be given of a case where connection is made with an application program in response to a request from the mobile terminal device. The mobile terminal device uses the destination subaddress of the call setup request message,
Specify the application program to connect to. For example, an application program is specified by an IP address and a port number. The logical line control unit 1
Upon receiving the call setup request primitive defined by -28, the control path is established using the destination subaddress and the application program of the connection destination using, for example, a socket library, and the incoming call notification primitive 76 is transmitted. The application program determines whether or not to receive an incoming call, and if so, sends an incoming call instruction primitive 77 to the logical line control unit 1. Thereafter, a data path is established with the mobile terminal device that has requested connection, and an incoming call confirmation primitive 78 is transmitted. In this way, a connection can be made from the mobile terminal device to a target application program. The detailed sequence of this operation is shown in FIGS.

Next, a case will be described in which a mobile terminal device not implementing a protocol such as TCP / IP communicates with an application operating on TCP / IP. The destination sub-address of the call setup request message transmitted from the mobile terminal.
Non-IP-IP indicating that it does not implement the IP protocol but wants to connect to a server running on TCP / IP
Specify the connection service and I
The designation of the P address and the port number, and the designation of the connection by TCP or UDP are performed. When determining that the service is the non-IP-IP connection service, the logical line control unit 1 connects to the server process “non-IP-IP server” that provides the non-IP-IP connection service. Non-IP-IP
The server can be viewed as one of the application programs already described. Therefore, the connection between the mobile terminal device and the non-IP-IP server is the same as the connection between the mobile terminal device and the application program described above.
The non-IP-IP server transfers the data received on the data path from the IP address and the port specified in the call setup request message to the connection destination using the protocol (TCP or not) specified in the call setup request message. Connection by UDP). As a result, TCP /
Mobile terminal device implementing IP protocol and TCP /
Since it is possible to connect servers operating on IP, it is possible to use an arbitrary Internet service from a mobile terminal device that does not implement a TCP / IP program.

[0115] In addition, the interconnecting device performs the following communications (4) and (5). ((4) When the interconnecting device receives a connection request issued from a mobile terminal that is to send an IP packet and specifies a special number as the connection destination PS number) The IP packet is cut out from the line, The extracted IP packet is L
The data is transmitted to the LAN via the AN communication control unit 35. The IP packet addressed to the mobile terminal is fetched from the LAN via the LAN communication control unit 35, and the destination IP address of the fetched IP packet is converted into a PS number. A line is established with the mobile terminal specified by the PS number obtained by the conversion.

((5) A mobile terminal that does not execute TCP / IP and UDP / IP,
When communication is performed between an application on a general device including an interconnecting device that executes / IP, the data transmitted from the mobile terminal includes a TCP and an IP header or a UDP and an I
Attach a P header. The generated IP packet is transmitted to a target application. The TCP and the IP header or the UDP and the IP header are deleted from the IP packet returned from the application. Only the remaining data portion from which the header has been deleted is transmitted on the line with the mobile terminal.

The operation of each component of the interconnection device shown in the sequence diagrams of FIGS. 21 to 26 is performed by implementing the program based on the flowcharts shown in FIGS. 13 to 20 by each component. Will be The operation of the logical line controller 1 in the sequence diagram of FIG. 21 will be described with reference to the flowchart of FIG. FIG. 16 is a main flow chart of the logical line control unit 1, and each step is denoted by a reference character of an upper case "A". 21 and FIG.
In the sequence of No. 5, each step of the logical line control unit 1 in FIG. 16 includes capital letters “A1,” “A2,” “A3,”.
The reference numerals of the flowcharts corresponding thereto are given. FIG. 14 and FIG. 15 are flowcharts of the processing contents of the wireless communication control section 9, and each step has a capital letter "K".
Reference numerals “M” and “N” are given. In the sequences of FIGS. 21 to 25, each step of the wireless communication control unit 9 is also denoted by a reference numeral of a flowchart corresponding to the capital letter "K1,""K2,""K2," and so on. . In these sequence diagrams, a portion marked with “〜” in the vertical line indicates a reception waiting state. A portion with a “●” symbol in the vertical line indicates a transmission process. In FIG. 21, the wireless communication control unit 9 is indicated by two vertical lines. This means that when a mobile terminal in the same wireless area is connected to a line, the wireless communication control unit 9 performs the processing on the request source side and the processing on the request destination side in parallel. In the following description, the processing on the request source side and the processing on the request destination side will be distinguished from each other.

The logical line control unit 1 constantly monitors a connection notification message that can be transmitted from the information exchange unit 6 (steps A1 to A3). This path includes the path to the lower layer,
There is a path to the same layer and a path to a higher layer. The wireless communication control unit 9 and the ISDN or PS
A TN communication control unit 32 exists, and a logical line control unit (not shown) that performs the same processing as the logical line control unit 1 in another interconnecting device is provided in the same layer as the logical line control unit 1. Exists. Then, WWW, FTP, and Te are placed in the upper layer of the logical line controller 1.
There are application programs such as lnet.

<Processing of Radio Communication Control Unit 9 in Waiting for Receiving State in FIG. 14>
The sequence in FIG. 21 with the wireless communication control unit 9 will be described with reference to FIG. It is assumed that a mobile terminal device 1101 in the wireless area of the interconnection device 11 has transmitted a call setup message.

At this time, the wireless communication control section 9 determines in step N1
And a reception waiting state consisting of step N2. At step N1, the reception of the call setting is determined. If received, the wireless communication control unit 9 proceeds from step N1 to step K1 in FIG. 15 in order to perform processing on the request source side.
At step N2, the reception of the connection notification message is determined. If received, the wireless communication control unit 9 proceeds from step N2 to step N6 in order to perform processing on the request destination side.

<Wireless communication control section 9 performs processing on request side (steps K1 to K3)> When the call setup message issued by mobile terminal 1101 is received in step N1,
The wireless communication control unit 9 proceeds to step K1, and transmits a connection notification message to the logical line control unit 1 located in the upper layer. After the execution of step K1, the process proceeds to step K2, where the wireless communication control unit 9 transmits a CC call setting display message to the logical line control unit 1 located in the upper layer. After the execution of step K2, in step K3, the logical line control unit 1 is in a standby state for receiving the CC call setting acceptance request message sent back. <Steps A4 to A9 of the Flowchart of FIG. 16 Processing of the Logical Line Control Unit 1> The wireless communication control unit 9 is in a lower layer when viewed from the logical line control unit 1. Upon receiving the connection notification message from the lower layer, the logical line control unit 1 proceeds to step A4 and waits for reception of a call setting display message.

In step K2, when the wireless communication control unit 9 transmits a call setting display message, the logical line control unit 1
Receives this (Step A4: Yes), and transmits an SAP select to the process management unit 40. After the transmission, the process proceeds to step A5. Since the call setting display message has been transmitted, it is necessary to cause the wireless communication control unit 9 to transmit the CC call setting reception.
To the CC call setup acceptance request message (step A
5). The logical line control unit 1 reads the request destination indicated by the call setting display message, and instructs the position information holding unit 3 to acquire the paging area information and the current position information of the request destination (step A6). . Upon receiving an instruction from the logical line control unit 1, the location information holding unit 3 refers to the content held by itself, and if necessary, inquires about the content held by the location information holding unit in another device, The general call area information and the current position information are acquired. The process of obtaining the paging area information and the current position information will be described later in detail with reference to the flowchart of FIG. In the sequence of FIG. 21, since the mobile terminal 1102 of the request destination exists in the wireless area of the interconnecting apparatus 11, the location information holding unit 3 reads out the paging area information and the current location information held by itself and executes the logical operation. Deliver to the line control unit 1.

Here, the paging area information including the cluster of the interconnecting device 11, the card number of the private base station 25, and the current location information containing the CS-ID of the private base station 25 are logically. It is passed to the line control unit 1. On the other hand, the process management unit 40 receiving the SAP select sets the logical line control unit 1
A control path is allocated to the logical line control unit 1 in order to transmit control information between the logical channel control unit 1 and the wireless communication control unit 9.

The logical line control unit 1 having received the paging area information and the current position information and assigned a control path receives the message or primitive from the received message or primitive, and connects the lower layer to the lower layer, the connection between the same layers (logical line). The connection between the control units 1) and the connection between the upper layer and the lower layer are determined (Step A9). Note that the determination of the connection mode in step A9 is uniquely determined by referring to the types of primitives and messages. This is because the primitive in FIG. 10A is from the lower layer, the message in FIG. 10B is from another device, and the primitive in FIG.
This is because, for example, from the upper layer, it is specified which connection instruction message and message are transmitted from which layer to which layer, and at which layer.

Here, if the request destination does not exist in the wireless area of the own device, the connection between the same device and the interconnecting device where the request destination is located is made based on the identification number obtained by the position information holding unit 3. Determine connection. If the request destination exists in the wireless area of the own device, the connection destination is determined in steps A10 and A11 based on the current position information acquired by the position information holding unit 3 in order to connect to the network where the request destination is located. The communication interface card is specified and the connection between the lower layer and the lower layer or the connection between the upper layer and the lower layer is determined. <Radio communication controller 9 of the flowchart requester in FIG.
K3 to K12> When waiting for reception in step K3, the wireless communication control unit 9 receives the call setting acceptance request message issued from the logical line control unit 1 and proceeds to step M3.
Move to 6. The transmission of the CC call setting acceptance request message indicates that the logical line control unit 1
In step M6, the radio communication control unit 9 transmits a CC call setting acceptance specified in the RCR-STD 28 to the requesting mobile terminal 1101 on the radio line. After execution of step M6, the process moves to step M5 and waits for a CC call setting response message to be transmitted.

<(1) Return Connection in Interconnection Device> Subsequently, the wireless communication control unit 9 and the mobile terminal 11 as the request destination
FIG. 17 and FIG.
1 will be described together with the sequence diagram of FIG. FIG.
Is a flowchart showing the processing of the logical circuit control unit 1 when connecting the mobile terminals within the wireless area of the interconnecting apparatus. Each step is denoted by a capital letter "B". I have. <Processing of the logical line controller 1 in the flowchart of FIG. 17>
The logical line control unit 1 having been assigned the control path transmits a connection notification message on the control path (step B).
2). Since the control path leads to the wireless communication control unit 9 in the lower layer, the connection notification message is transmitted back through the logical line control unit 1. After the transmission, the logical line control unit 1 reads the card number of the base station where the requested mobile terminal is located from the current position information passed from the position information holding unit 3, and reads the CS-ID of the base station. Then, a PC individual arrival notification message describing these is transmitted on the control path (step B3). After the transmission, it waits for a PC incoming response notification message to be transmitted from the control path (step B4). <Radio communication controller 9 of the flowchart request destination in FIG.
Processing> The wireless communication control unit 9 monitors the reception point with the upper layer (in this case, the logical line control unit 1 is in the upper layer) in steps N1 to N2, and moves to the wireless area. It waits for a connection notification message to monitor the connection notification to the terminal. If received, the process moves from step N2 to step N6 to perform the processing on the request destination side.

At step N6, the wireless communication control section 9 waits for a PC individual arrival notification message to be transmitted from the upper layer. Since the wireless communication control unit 9 only waits for the PC individual arrival notification message from the logical line control unit 1 in the own device, the wireless communication control unit 9 determines whether the request source is the own device or another device. I have not sensed this. If the PC individual arrival notification message is received, step N6 to step K
Move to 4. Since the PC individual arrival notification message includes the card number of the base station determined from the current location information and the CS-ID of the base station, the wireless communication control unit 9 is instructed to these in step K4. Have the base station make a paging call. In other words, the base station uses the paging channel (Pch) to transmit a Pch call message in which the requested PS number is written. After execution of step K4, the process proceeds to step K13. In step K13, the mobile terminal 1102 waits for an RT incoming call response to be transmitted. Mobile terminal device 1102 in a powered-on state
Is in a standby state. Standby state is always Pch
To monitor the incoming call addressed to the own station.

In this standby state, when a Pch call describing the PS number of the own apparatus is detected, the mobile terminal 1102
Transmits an incoming call response message indicating that the incoming call has been received to the wireless communication control unit 9 (transmission of an RT incoming call response message). The wireless communication control unit 9 having received this shifts from step K13 to step K14, and transmits the PC call response notification message to the mobile terminal 1102.
Reports to the upper layer that has detected the incoming call. Step K1
After execution of Step 4, the flow shifts to Step K15. Step K1
In step 5, it waits for a call setup request message to be transmitted from the control path from the upper layer. If received, the process proceeds from step K15 to step K5.

<Processing of Flowchart Logical Circuit Control Unit 1 in FIG. 17> When a PC call response notification message is transmitted from a lower layer via a control path, the logical circuit control unit 1
Knows that the requested mobile terminal has accepted the incoming call. The logical line control unit 1 transmits a call setup request message on the control path to request the wireless communication control unit 9 to establish a call connection with the request destination (step B5). In order to secure a data transmission path, the process management unit 40 is requested to allocate a data path. In this case, the data path allocated in this case connects the base stations in order to return the data in the interconnection device 11. When the data path is allocated by the process management unit 40, the logical line control unit 1 notifies the path allocated to the wireless communication control unit 9 in step B6. With this notification, the wireless communication control unit 9 can use the data path.

When the data path allocation is completed and the data can be transmitted back, the logical line controller 1 monitors the control path and waits for a call setting acceptance display message to be transmitted from the lower layer (step B7). ). The wireless communication control unit 9 allocates any one of the four wireless channels included in the TDMA frame to the mobile terminal 1102 that has transmitted the RT incoming call response, and transmits a call setup message using the associated control channel of the wireless channel. Transmission is performed in step K5, and the process proceeds to step K6 to wait for CC call setting acceptance to be transmitted on the associated control channel.

Some time after the execution of step K5, the logical circuit control unit 1 notifies the path. During this time, the wireless communication control unit 9 proceeds to step K6, and proceeds to step K6.
In step 6, the wireless line assigned to the mobile terminal 1102 is monitored, and a CC call setting acceptance is transmitted from the wireless line. On the other hand, the mobile terminal 1102
Is constantly monitored, and when a call setting message is transmitted on this wireless line, a CC call setting acceptance is transmitted on the wireless line. Rings after sending a call setup message,
Notify the operator of the incoming call.

At step K6, the control unit 9 monitors the associated control channel and waits for the reception of the CC call setting.
Receives this. The CC call setup acceptance message indicates that the requested call setup process has been started, and is a message for notifying that no more call setups will be accepted. A CC call setting acceptance indication is transmitted on the control path. After the transmission, the mobile terminal 1102 waits for a CC response to be transmitted to the associated control channel of the wireless channel allocated to the mobile terminal 1102.

When the speaker holding the mobile terminal 1102 indicates the intention to respond, the mobile terminal 1102 transmits a CC response on the associated control channel. The wireless communication control unit 9 monitoring the associated control channel and waiting for the identification number transmits a CC call setup confirmation message on the control path in step K9. Then, the process proceeds to step K10, in which the control path is monitored, and it waits for a call setup completion request message to be transmitted from the upper layer.

If received, the process proceeds from step K10 to step K11. In step K11, a call setting response confirmation message is transmitted to mobile terminal 1102. The logical line control unit 1 that has received the CC call setting acceptance continuously monitors the control path and waits for the reception of a call setting confirmation message (step B8). When the wireless communication control unit 9 transmits a CC call setting confirmation message on the control path in step K9, the logical line control unit 1 considers that the call has been established at the request destination, and transmits a call setting completion request message to the control path ( Step B9). When the radio communication control unit 9 monitors the control path with the upper layer, when the call setting response message is transmitted from the upper layer by the control path, the radio communication control unit 9 proceeds to step K1.
In step 1, an RT incoming call response is transmitted to the associated control channel allocated to the mobile terminal 1102. The RT incoming call response message is a message that is transferred to notify the called mobile terminal that the call has been provided, and the logical circuit control unit 1 that knows that the call has been established at the request destination receives the request. Inform the original to this effect. Therefore, on the control path (in this case, the return transmission in the interconnect device,
The control path is connected to the wireless communication control unit 9. In step b10), a CC call setting response message is transmitted. The wireless communication control unit 9 monitoring the control path receives the CC call setting response message sent from the logical line control unit 1. The call setting response message is a message indicating that the call has been established, and when pressed, transmits a CC response on the associated control channel of the wireless line used by the requester that issued the call setting, thereby requesting the request destination. Informs that the call has been established. As described above, between the mobile terminal 1101 and the interconnection device 1, the mobile terminal 1102-
Since a call has been established between the interconnecting devices 1 and a data path for return transmission has been established inside the interconnecting device 1, bidirectional communication by byte stream transmission is possible between the mobile terminal device 1101 and the mobile terminal 1102. .

[0135] Even when the mobile terminal 1102 is registered in the public base station 7 or connected to the Ethernet, the interconnection apparatus performs the loopback connection. When the mobile terminal 1102 has registered its location with the public base station 7, the card number of the ISDN or PSTN communication control unit 32 is described in the current location information of the mobile terminal 1102 (see the description of the location information holding unit 3). reference). When such current position information is instructed by the logical line control unit 1, the process management unit 40
Is the ISDN or ISDN from the card number of the PSTN communication control unit 32
Alternatively, a control path having the PSTN interface card 31 as an end point is allocated. Subsequently, the ISDN or PSTN communication control unit 32
Then, the public base station 7 is called with the telephone number of the public base station 7 indicated in the current location information, and the public base station 7 establishes a call with the mobile terminal 1102. On the other hand, the logical line control unit 1 realizes a loopback connection by establishing a data path between the ISDN or PSTN communication control unit 32 and the wireless communication control unit 9.

Similarly, when the mobile terminal 1102 is connected to the Ethernet, the current position information of the mobile terminal 1102 includes the LA.
The card number of the N interface card 34 is described (see the description of the position information holding unit 3). When such current position information is instructed by the logical line control unit 1,
The process management unit 40 has the LAN interface card 3
A control path having the LAN communication control unit 35 as an end point is assigned from the card number 4. Then, ISDN or PSTN communication control unit 3
2 causes the LAN communication control unit 35 to establish a path with the mobile terminal 1102 using the IP address indicated in the current location information. On the other hand, the logical line control unit 1 realizes a loopback connection by establishing a data path between the ISDN or PSTN communication control unit 32 and the wireless communication control unit 9.

<(2) Connection of Another Interconnection Device with Mobile Terminal in Wireless Area> A case where the request destination is in the wireless area of another interconnecting device will be described with reference to the sequence of FIG. I do. In the following description, the wireless communication control unit 9 is called a wireless communication control unit 409, the logical line control unit 1 is called a logical line control unit 401, the process management unit 40 is called a process management unit 440, and so on. Each set component of the connection device 12 is assigned a reference number in the 400s to distinguish it from the components of the interconnection device 11 described above.

FIG. 13 is a flowchart showing the processing of the position information holding unit 3 at the time of call connection. Mobile terminal 1301
Sends a call setup message containing the requested PS number. The call setting message from the mobile terminal device 1301 reaches the wireless communication control unit of the interconnection device 11 via the private base station and the wireless interface card.

First, the mobile terminal device 1101 sets up a call, which is transmitted via the radio communication control unit 9 to the logical line control unit 1.
Is transmitted, the logical line control unit 1 decodes the service type and the PS number of the requested mobile terminal from the call setup message. The logical line control unit 1 determines from the call setup message that the service is a voice service and that the mobile terminal device
Get PS number. From the obtained PS number, the location information holding unit 3
FIG. 13 shows a process for searching for the location information of the mobile terminal 1201.
This will be described with reference to the flowchart of FIG.

When there is an inquiry about the location of the request destination, the position information holding unit 3 determines in step G2 whether the request destination exists within the wireless area of the own device (whether the request destination is registered in the own device). Is determined. If it exists, in step G7, the paging area information of the request source is read from the location information holding unit 3. In this case, the paging area information of the mobile terminal 1201 is obtained even if the request destination is searched.
Since the current position information was not obtained, the position information holding unit 3
Knows that the mobile terminal 1201 has not registered.
The location information holding unit 3 proceeds to step G1, and determines whether the home device is the own device based on the PS number of the request destination mobile terminal device. If it is the own device, the general paging area information is read in step G9. However, since “1201” indicated in the PS number indicates that the interconnection device 12 is under the jurisdiction, the request destination is determined in step G3. The logical line control unit 1 requests the logical line control unit 1 to establish a logical line with the interconnection device 12 found from the PS number.

When the logical circuit control unit 1 connects the interconnection device 12, in step G4, the information exchange unit 6 is requested to transmit a reference request to request transmission of the paging area information. After execution of step G4, the process proceeds to step G5. In step G5, the logical line is monitored, and the reception of the notification of the paging area information is waited. It is to be noted that the paging area information is required because the mobile terminal 1201 may leave the home interconnection apparatus and be present in the wireless area of another interconnection apparatus. In this case, the paging area information returned from the interconnect device 12 indicates the interconnect device 14. The location information holding unit 3 that obtains the paging area information and grasps the location information of the mobile terminal 1201 transmits this to the logical line control unit 1.

Since the paging area information of the mobile terminal 1201 has moved to the interconnection device 14, the logical line control unit 1 disconnects the logical line with the interconnection device 12 and is indicated by the paging area information. A logical line is established with the interconnecting device 14, which is the interconnecting device in question. As shown by the socket connection in the figure, the logical line control unit 1
Establish a logical line with A communication start message is transmitted to the interconnection device 14 corresponding to the paging area information (step C1).

The logical line control unit 401 waits for a message from the upper layer, the lower layer, and the same layer while waiting for the message shown in FIG. 16 (step A).
1) In this reception waiting state, a communication start message transmitted from the same layer path through the logical line is received.
Logical line control unit 401 receiving the communication start message
Sends the SAP select to the process management unit 440,
A control path is transmitted for transmitting control information to and from a lower layer. The process management unit 440 establishes a control path and transmits an SAP notification message indicating the end point of the control path to the logical line control unit 401.

After transmitting the communication start message, the logical line control unit 1 of the interconnection apparatus 11 specifies the PS number of the mobile terminal 1201 from the call setup message,
1 is generated. Then, the generated connection request message is transmitted to the logical line control unit 1401 of the interconnection device 14 (Step C2).

After the transmission, the logical line control unit 1 monitors the logical line and waits for an incoming response message indicating that the mobile terminal 1201 has responded to the incoming call from the interconnection device 14 (step C3). When receiving the connection request message 61, the logical line control unit 1401 of the interconnection device 14 reads out the PS number from the connection request message 61 and inquires the position information holding unit 3 of the current position information on the PS number. As mentioned above, the current location information
The card number of the base station corresponding to the mobile terminal 1201 and the CS-ID of the base station are described.

The logical line control unit 401 creates the individual arrival notification primitive 51 based on these, and transmits it on the control path. The wireless communication control unit 9 that has obtained the PC individual arrival notification message makes an incoming call to the mobile communication device 1201 via the wireless interface card and the base station. Subsequent processing between the logical line control unit 401 and the wireless communication control unit 409, and processing between the wireless communication control unit 409 and the mobile terminal 1201, except for the transmission and reception of a paging message to be described later, are based on the logical line control described in <(1)> above. This is the same as the processing between the section 1 and the request destination.

When the mobile terminal device 1201 responds to the incoming call, the radio communication control unit 409 issues an incoming call response notification primitive 52 in step K14 to notify the logical line control unit 401 in the upper layer. Is done. The logical line control unit 401 having received the incoming call response notification primitive 52 creates an incoming response message 62 from the incoming call response notification primitive 52, and
To the logical line established by.

In step C3, by monitoring the logical line, the logical line control unit 1, which has been in the standby state for receiving the incoming response message, receives the incoming response message, and transmits the incoming response primitive 74 to the mobile terminal that has issued the request. Transmit to the device 1101. The logical line control unit 1 sets a data path between the logical line control unit 1 and the wireless communication control unit 9 in cooperation with the process management unit 40 (step C).
4). After the setting, it waits for the connection confirmation message to be transmitted from the logical line established with the interconnection device 14 (step C5).

<FIG. 14 Processing of Wireless Communication Control Unit 409>
In the processing of <(1)>, the wireless communication control unit 409
In step K5 of step 4, a radio channel is allocated to the mobile terminal 1201, and a call setup message is transmitted on the associated control channel. After execution of step K5, a data path connecting the logical line control unit 401 and the wireless communication control unit 409 is assigned to the address information holding unit 440. As a result, the logical line control unit 401 -the wireless communication control unit 409
Data transmission between the two has become possible.

In step K6, radio communication control section 409 waits for a CC call setting acceptance to be transmitted. If received, the process proceeds from step K6 to step M3. In step M3, a call setting acceptance display is transmitted to the upper layer. After execution of step M3, the process proceeds to step M8. In step M8, the wireless communication control unit 409 waits for a CC response message to be transmitted from the wireless line. If received, the process goes from step M8 to step M9. At Step M7, it is determined whether or not the call message has been received. If not received, step M
7. Continue repeating M8.

The mobile terminal device 1201 on the receiving side that has transmitted the call setting acceptance message becomes the mobile terminal device 110 on the calling side.
1 is sent a call message. This call message is for transmitting control information such as call information and additional information. This call message corresponds to step M7 in FIG.
, The logical channel control unit 4 received by the wireless communication control unit 409 and located in the upper layer in step M1.
A call display message is transmitted to 01. Thereafter, the process proceeds to step K9. The wireless communication control unit 409 transmits a call setting confirmation message to the upper layer in Step K9,
In step K10, the process waits for a call setup completion request message to be transmitted from the upper layer. If so, the process moves from step K10 to step K11. At step K11, a call setup response confirmation message is transmitted to the mobile terminal 1201 on the associated control channel of the wireless channel. <Processing of the logical line controller 1 in the flowchart of FIG. 17>
The logical line control unit 401 that has received the call display message issued by the wireless communication control unit 409 in step M1
The control information is transmitted to the interconnection device 11. <Process of the Flowchart Wireless Communication Control Unit 209 in FIG. 14> When the user using the mobile terminal device 1201 or the application on the mobile terminal device 1201 indicates the intention to respond by an off-hook operation or the like, the mobile terminal A response message is transmitted from the device 1201 on a wireless line with the interconnecting device 14. Upon receiving the response message, the wireless communication control unit 409 transmits a call setting confirmation message to the logical line control unit 401 located in the upper layer in step K9.
Send to

The logical line control unit 401, having received the call setting confirmation message, transmits a connection confirmation message to the logical line control unit 1 across the logical line, and in step B9 sends a call setting completion request to the radio communication control unit 209. Send a message. <Processing of the logical line controller 1 in the flowchart of FIG. 18>
By monitoring the logical line, the logical line control unit 1 in a state of waiting for the connection confirmation message receives the control information transmitted via the logical line (step C).
5). Upon receiving the control information, the logical line control unit 1 transmits a call request message to the wireless communication control unit 9 located in the lower layer (Step C7).

In the processing of <(1)>, the logical line control unit 401 that has received the call setting confirmation message from the wireless communication control unit 409 located in the lower layer transmits the connection confirmation message via the logical line to the logical line control unit. Send to 1. The connection confirmation message transmitted in this manner is transmitted to the logical line controller 1.
Receives. After the reception, a call setting response message is transmitted to the wireless communication control unit 9 located in the lower layer (step C).
8). Upon receiving this, the wireless communication control unit 9 proceeds to step K
At 12, a response message is transmitted to the mobile terminal device 1101 on the wireless line. A wireless channel is established between the mobile terminal device 1101 and the wireless communication control unit 9, and the wireless communication control unit 9
A logical line is established between the logical line controller 1, a control path is established between the logical line controller 1 and the logical line controller 201, and a data path is established between the logical line controller 201 and the wireless communication controller 209. Then, since a wireless channel has been established between the mobile terminal 1201 and the wireless communication control unit 209, byte stream transmission occupying the channel can be performed between the mobile terminal device 1101 and the mobile terminal device 1102.

At this time, the logical line setting unit 8 of the interconnection device 11 registers information such as the PS number of the mobile terminal 1101 and the communication mode. Similarly, the logical line setting unit 8 of the interconnection device 12 registers information such as the PS number of the mobile terminal 1201 and the communication mode. These pieces of information are released when the call is disconnected. <(3) Connection from application on LAN terminal to mobile terminal device> Next, FIG. 19 is a flowchart and FIG.
3. The transmission from the application on the LAN terminal to the mobile terminal device will be described with reference to the sequence diagram of FIG. FIG. 19 is a flowchart when a connection is made from an application to a mobile terminal, and each step is denoted by a capital letter "D".

In FIG. 40, the application in the upper layer of the logical line controller 1 establishes a control path by calling the function VC_init (), and transmits a communication start message and a connection notification message. The logical line controller 1 waits for messages from the upper layer, the lower layer, and the same layer while waiting for the message of the flowchart shown in FIG. 16 (steps A1 to A3). In the reception waiting state, a communication start message transmitted from an upper layer path is received (step A1).

Upon receiving the connection notification message from the application, the logical line control unit 1
(Step D1), and waits for a connection instruction message from the application (step D2). Subsequently, the application specifies a connection destination PS number, its own SAP, an IP address, a communication service, and a control path, and specifies a function VC_snd_prim_connrq.
Call (). By this function VC_snd_prim_connrq (),
The connection instruction message is transmitted to the logical line control unit 1.
After this transmission, the application waits for reception of an incoming response from the logical line control unit 1.

Since the logical line control unit 1 has been waiting for the connection instruction message, it receives the connection instruction message. This connection instruction primitive 73 is
In this case, a connection is instructed to the logical line control unit 1 by a request source field and a request destination field. After the reception, the logical line control unit 1 is specified in the connection instruction message.
The location information of the request destination is inquired to the position information holding unit 3 from the PS number. In this case, since the mobile terminal device 1101 has registered its location in the interconnecting device 11, the paging area information of the mobile terminal device 1101 notified from the location information holding unit 3 indicates the interconnecting device 11, and its current The location information also indicates the interconnection device 11. Mobile terminal device 110
Since the logical circuit control unit 1 knows that the location registration has been made to the interconnecting apparatus 11, the logical line control unit 1 acquires the current location information.
The acquired current position information describes the card number of the base station corresponding to the mobile terminal 1101 and the CS-ID of the base station. As a result, the logical channel control unit 1 that has learned that the mobile terminal device 1101 is within its own wireless area transmits a PC individual arrival notification message to the wireless communication control unit 9 (step D11). After transmission, the logical line control unit 1 waits for reception of an incoming call response notification message from the wireless communication control unit 9 (step D3). Upon receiving the incoming call response notification message, in step D4, an incoming response primitive is transmitted to the application side.

The application that has been waiting for the reception of the incoming response message receives the signal issued by the logical line control unit 1. The incoming response primitive specifies the SAP to the source mobile terminal. The application is
Using this incoming response message as an argument, the function VC_rcv_pri
Call m_called (). Function VC_rcv_prim_called ()
Parses the incoming response message to obtain a connection handle. When the connection handle is obtained, the application
A data path is established by calling VC_set_dpath () with this connection handle as an argument. Thereafter, the application monitors the control path with the lower layer and waits for a connection confirmation.

In step D4, the incoming response message is transmitted to the upper layer, and the logical line controller 1 transmits a call setting request message to the radio communication controller 9 located in the upper layer. After the transmission, the processing of <(1)> is continuously performed in cooperation with the wireless communication control unit 9. After the transmission of the incoming call response message, the path setting described in the process <(1)> is performed between the wireless communication control unit 9 and the logical line control unit 1. When the path notification is transmitted from the wireless communication control unit 9, the logical line control unit 1 sets a data path with the wireless communication control unit 9. In this way, by setting a path between the application and the logical line control unit 1 and between the wireless communication control unit 9 and the wireless communication control unit 9, data input and output between the application and the wireless communication control unit 9 can be performed. It becomes possible.

Subsequently, the logical line control unit 1 waits for reception of a call setting confirmation message (step D7). Where <
In the process of (1)>, the mobile terminal device 1101 on the receiving side that has transmitted the call setting acceptance message transmits a call message to the wireless communication control unit 9 on the wireless line. The wireless communication control unit 9 that has received the call message transmits a call display message to the logical line control unit 1 located at a higher layer.

When a call indication message including control information is received from the wireless communication control unit 9 in a standby state for receiving a call setting confirmation message (step D8), the logical line control unit 1 transmits the application signal located in the upper layer. The received control information is transmitted to the application (step D9). When receiving a call setting confirmation message from the lower layer wireless communication controller 9 following the call indication message (step D7), the logical line controller 1 completes the call setting to the lower layer wireless communication controller 9. A request message is transmitted (step D12). A connection confirmation message is transmitted to the application in the upper layer. Upon receiving the connection confirmation message from the logical circuit control unit 1 located in the lower layer, the application receives the VC_rcv_prim_call
The connection confirmation message is analyzed by cfm (). Thereafter, using VC_read () or VC_write (), the application reads and writes data via the logical line. Through these steps, a connection between the application and the mobile terminal device is established.

If the mobile terminal device specified by the connection instruction primitive 73 is not within the wireless area of the interconnecting device, the home of the mobile terminal is accessed to connect the target mobile terminal device to the current one. A device is searched for and a connection request message 61 is transmitted to the connected interconnection device. Subsequent procedures are the same as in the case of <(2)>.

<(4) Connection from Mobile Terminal Device 1101 to Application> FIG. 20 shows processing of the logical line control unit 1 when a call is made from the mobile terminal device 1101 to an application on a LAN card. FIG. 23 is a sequence diagram showing this state. Referring to FIG. 23, it can be seen that the sequence between the wireless communication control unit 9 and the mobile terminal device is the same as the sequence of the process of <(1)>. Therefore, the sequence of the difference between the logical line control unit 1 and the application will be described.

The mobile terminal device 1101 desiring connection with the application specifies the request destination application program by the destination subaddress of the call setup message. Here, the mobile terminal device 1101 is of a mobile phone type and has a TCP / I
It cannot be based on protocols such as P. TCP /
Mobile terminal device 1101 that cannot be based on IP protocol
Transmits to the logical line control unit 1 a call setup message in which the non-IP-IP connection service is specified in the destination subaddress. The designation of the non-IP-IP connection service indicates that the requesting mobile terminal device does not have TCP / IP but wants to connect to a server operating on TCP / IP.

The call setup message transmitted as described above undergoes the process of <(1)>, and the radio communication control unit 9 located in the upper layer and the logical line control unit 1 located further in the upper layer
Delivered to The logical channel control unit 1 transmits a non-IP-IP
If it is determined that the connection service has been requested, the Internet connection unit 37 is caused to generate a server process “non-IP-IP server” for providing a non-IP-IP connection service. Non-IP-IP
The server decodes the data received on the data path to the IP address and port number specified in the call setup message, and further specifies whether the protocol specified in the call setup message specifies TCP or UDP. Is determined. The non-IP-IP server decrypts the IP address and the port number, and thus knows that the request destination of the mobile terminal device 1101 is an application.
Requests the process management unit 40 to set a control path with the upper layer (step E1), and when the control path with the upper layer is established, transmits a connection notification message on the control path. (Step E2).

After transmission, an incoming notification message is transmitted on the control path (step E3). After the transmission, the logical line control unit 1 monitors the control path and waits for an incoming instruction message from an upper layer (step E5). When an incoming notification message is transmitted from the logical line control unit 1 located in the lower layer via the control path, the application program calls the function VC_rcv_prim_callind (), and the incoming call notification received by the logical line control unit 1 is received. Parse the message. The incoming call notification primitive 76 is a message for the logical circuit control unit 1 to notify the application of the incoming call when a call is made from the mobile terminal.
On the other hand, when the function VC_rcv_prim_callind () is called, the address of the request source, the communication service, and the connection handle are given as outputs. Note that this function VC_rcv_pri
For the output of m_callind (), see the function VC_rcv_pr in FIG.
Please refer to the item of im_callind ().

After the acquisition, the application calls the function VC_snd_prim_callrp () using the control path as an argument. By the call of this function VC_snd_prim_callrp (), an incoming call instruction message is transmitted to the logical circuit control unit 1 in the lower layer. After the transmission of the incoming call instruction message is completed, this application waits for the reception of the incoming call response from the logical line control unit 1. Then, the application is VC_set_dpath
Call () to establish the data path.

The logical line controller 1 receives the incoming call instruction message transmitted from the upper layer. The incoming call indication primitive 77 is a message indicating whether or not the application has accepted the incoming call notified by the logical line control unit 1 by the incoming call notification message. An identifier for associating with a message is set. Upon receipt of this, an incoming call confirmation message is transmitted to the application (step E5). The incoming call confirmation primitive 78 is a response message to the incoming call instruction message issued by the application to the logical line controller 1.
When the call setup for the incoming call is completed, the connection handle is returned. At the same time, it transmits a call setting response message to the wireless communication control unit 9 in the lower layer (step E6).

Next, the explanatory diagram of FIG. 9B and FIGS.
8 while the mobile terminal is communicating using the flowchart of FIG.
An operation example in the case of moving from a currently connected interconnect device to a wireless communication area of another interconnect device (handover) will be described. FIG. 26 is a flowchart showing the processing of the logical line control unit 1 in the interconnecting apparatus on the side where the mobile terminal has entered, and each step is denoted by a capital letter "H". . FIG. 27 is a flowchart showing the processing of the logical line control unit 1 in the interconnecting device on the side where the mobile terminal has entered, and each step is denoted by a capital letter "J". . FIG.
This is a flowchart showing the processing of the mobile terminal on the communication partner side at the time of handover, and each step is denoted by a capital letter "J". FIG. 28 shows a sequence at the time of handover. In this communication system, when the mobile terminal moves into the wireless area of another interconnecting device, call setup is performed again for the interconnecting device in the new wireless area, and the interconnecting device that has been connected up to that time is set. Is performing a “reconnection type” handover in which the call is disconnected. Therefore, the description of the processing when the mobile terminal connects to the destination interconnecting device is omitted, and the process of how the destination interconnecting device specifies the communication partner of the mobile terminal will be described.

In the following description, the interconnection device 13
Each of the constituent elements of the interconnection device 13 is assigned a reference numeral in the 100s, such as the logical line control unit 301 for the logical line control unit 1 and the process management unit 340 for the process management unit. The components of the interconnect device 11 described above are distinguished from each other. Each set component of the interconnecting device 15 has a reference number in the 500s, such as the logical line controlling portion 501 for the logical circuit controlling portion 1 in the interconnecting device 15 and the process managing portion 540 for the process managing portion. Then, the components of the interconnection device 11 described above are distinguished from each other.

It is assumed that mobile terminal device 1201 is carried by a speaker and has moved from the wireless communication area of interconnection device 14 to the wireless area of interconnection device 15. In step H1, the logical line control unit 501 of the interconnecting device 15 is waiting for the mobile terminal to enter the wireless area of the own device. If so, proceed to step H2,
If not, step H1 is repeated. Mobile terminal device 120
In response to the message from No. 1, the logical line control unit 501
It detects that it has moved into the wireless area of the interconnection device 15. This detection is performed when the mobile terminal device 1 enters the wireless area.
201, a call setup message, or
This is performed by detecting a TCH switching request message.

The logical line controller 501 of the interconnection device 15
Detects that the mobile terminal device 1201 has moved to the wireless area, the logical line control unit 501 identifies the home base from the PS number of the mobile terminal device in step H2.
That is, the home interconnecting device is identified as the interconnecting device 12 from the PS number of the mobile terminal device 1201 included in the call setup message or the TCH switching request message.

At step H3, it is determined from the decrypted PS number whether or not the home base is the own apparatus. If the mobile terminal is under the jurisdiction of the own device, in step H10, the PS number and communication mode information of the communication partner are read from the communication mode holding unit 503. After executing Step H10, the process shifts to Step G2. If not, in step H4, the logical line control unit 501 of the interconnect device 15 establishes a logical line with the home device. Here, it is known from the PS number that the home of the mobile terminal 1201 is the interconnecting device 12. Therefore, in step H5, the interconnecting device 12 is queried for the PS number of the communication partner, the communication mode, and the previous current position information. . Step H
After the execution of step 5, the process proceeds to step H6 where the logical line control unit 5
01 is in an answer waiting state. If answered, the process moves from step H6 to step H7.

Here, the information exchange unit 15 of the interconnection device 15
06 sends an inquiry to the communication mode holding unit 1203 of the interconnect device 12 via the information exchange unit 1206 of the interconnect device 12. By the inquiry of the information exchange unit 1506,
The logical line control unit 501 obtains information such as the PS number of the other party with which the mobile terminal device 1201 was communicating before moving, the communication mode, and the previous current position information. Here, the mobile terminal 12
01 was determined to be the mobile terminal device 1101.

When the answer is obtained in step H6, the logical line control unit 501 refers to the PS number held in the position information holding unit 503. In step H7, the logical line control unit 501 is a communication partner in the wireless area of the own device. It is determined whether or not the mobile terminal device 1101 exists (whether or not the communication partner has registered the location with the own device). If the communication partner is within the wireless area of the own device, the process shifts to step J15 in FIG. 27 to switch the data path.
Move to 8. In step H8, the communication partner before the movement is
From the PS number, it is determined whether or not the home of the communication partner is the own device. Here, the communication partner of the mobile terminal device 1201 is the mobile terminal device 1101, and its home interconnecting device is 1
Since it is 1, the flow shifts to step H9 because it is different. In step H9, the logical line control unit 501 of the interconnecting device 15 establishes a logical line with the interconnecting device 11 that is the home device. After execution of step H9, step J
Move to 1. In step J1, the logical line control unit 501 of the interconnection device 15 inquires of the location information holding unit 3 of the interconnection device 11 about the paging area of the mobile terminal device 1101. After the inquiry, the logical line control unit 501 is in a standby state for an answer in step J2. If answered, the process moves from step J2 to step J4.
Here, the paging area of the mobile terminal device 1101 is within the wireless area of the interconnecting device 13, and the logical channel control unit 501 knows that the mobile terminal device 1101 is located within the wireless area of the interconnecting device 13.

[0176] If the communication partner is any of the mobile terminals under its control in the judgment of step H8, the logical line control section 501 sends the communication mode holding section 503 of the interconnecting apparatus 5 at step J14. Read the general call area. After execution of step H10, the process proceeds to step H8. In this way, the logical line control unit 501 of the interconnection device 15 can identify the location of the communication partner of the mobile terminal device 1201 that has moved. Subsequently, in step J4, the interconnection device 1301 establishes a logical line with the interconnection device 13 in the wireless area where the communication partner is located. After execution of step J4, the process proceeds to step J5. In step J5, the logical line control unit 501 of the interconnection device 15 transmits the reconnection request message 67 of FIG.

At step J6, the process waits for an incoming response message to be transmitted. If you receive an incoming response,
Move to step J7. If it is any of the mobile terminals under its control, the logical line control unit 501 proceeds to step J.
At 14, the simultaneous call area information of the communication partner is read from the position information holding unit 503 of the own device. After execution of step J14, the data path is switched in step J15.

On the other hand, in the interconnecting device 13 on the communication partner side,
The call is being connected. Here, in step J9, reception of a reconnection request message is waited. While waiting for reception, step J9 is repeated, and if received, the process proceeds from step J9 to step J10. Upon receipt,
It decodes the PS number of the requesting mobile terminal included in the reconnection request message and the cluster number of the requesting interconnection device.
After execution of step J10, the process moves to step J15.
In step J15, a call related to the request destination specified by the reconnection request message 67 is found from the calls already existing in the interconnection device 13.

If found, the logical line control unit 301 of the interconnection device 13 resets the data path as indicated by the reconnection request message 67 in step J11. Thereafter, the process proceeds to step J12, where an incoming response message 62 is transmitted to the interconnection device 15. In the present embodiment, the data path set between the interconnection device 13 and the interconnection device 14 is changed between the interconnection device 13 and the interconnection device 15.

In step J6, when the logical line control unit, which has been waiting for the reception of the incoming response message, receives the message, the interconnecting device 15 sets a corresponding data path. This completes the data path resetting. When the resetting of the data path is completed, it is in a state of waiting for the reception of a reconnection response message in step J7. In step J13, the interconnecting device 13 of the communication partner transmits a reconnection response message 58 to the interconnecting device 15.

At step J7, the reception of the reconnection response message 68 is awaited.
Moves to step J8. In step J8, the handover notification transmitting unit 38 transmits a handover notification 71 to the interconnecting device 14 before the mobile terminal device 1201 moves. Handover receiver 3 of interconnection device 14
When receiving the handover notification primitive 71, the wireless communication control unit 9 disconnects the wireless channel which has been used by the mobile terminal device 1201 before moving and is no longer valid. Thereby, the reconnection of the call and the data path due to the movement is completed, and thereafter, the mobile terminal apparatus 1301
And the mobile terminal device 1201 can communicate with each other.

Next, an example of the operation at the time of handover when performing data communication will be described. The operation in the data communication mode A is the same as the operation example described in the previous section. In the operation in the data communication mode B, a new call is set up with the destination interconnecting device without reconnecting to the interconnecting device before moving in order to enhance the consistency with the specifications of the network layer such as IP. For the terminal side, the same protocol sequence as that of the normal handover is executed, but the target interconnecting device transmits a handover notification 71 to the interconnecting device before the movement and the wireless channel invalidated by the movement. Only cutting. This makes it possible to efficiently use a finite radio channel.

The communication system construction method of the present embodiment has the following effects as compared with the existing system construction method. To add a new basic transmission line in a conventional communication system, add a protocol conversion unit for the new basic transmission line to the "router" and "gateway" interposed between the existing basic transmission lines. I was For example, when only protocol conversion between ISDN circuit switching and Ethernet is performed, it is necessary to provide one type of protocol conversion unit for performing protocol conversion. Even when connecting LANs, protocol conversion is required at the MAC level. LAN
In communication between the terminals, protocol conversion between terminals having different protocol stacks is also required. Furthermore, protocol conversion at the network layer or higher is required. As described above, in order to newly use the basic transmission line, the development of a new protocol conversion unit has been forced to connect the already connected basic transmission line and the new basic transmission line.

On the other hand, in the present embodiment, the logical line control unit 1 establishes a logical line on the basic transmission line and provides a line via the logical line. Therefore, it is not necessary to newly develop a protocol conversion unit when a new base transmission path is to be added. Therefore, interconnection can be realized with a minimum protocol conversion module. Protocol conversion is not required between terminals having different protocol stacks. When accessing the Internet, this communication does not require the implementation of heavy communication software for TCP / IP, but simply establishes a wireless line with the interconnecting device. As described above, since the interconnection device supplies the Internet communication service to the portable device through the line, the communication service can be equally supplied to the portable computer, the portable telephone, and the telephone on the public network.

In the communication system according to the present embodiment, the existing basic transmission path is used to the maximum extent, and the mobile terminal performs voice communication and mutual data communication with terminals on heterogeneous networks. Can be. In addition, location information, address information,
By exchanging call information and the like, and setting up a logical line spanning a plurality of interconnecting devices, it is possible to construct a scalable system.

Further, in the communication system according to the present embodiment, it is possible to select which transmission line among various existing basic transmission lines to use, and the degree of freedom in system construction is increased. As a result, various existing basic transmission lines can be effectively used. At the same time, it is possible to establish communication with a mobile terminal device that moves across various existing basic transmission lines.

In addition, in the communication system according to the present embodiment, the mobile terminal devices connected to the circuit-switching type interface identify each other by the MAC address, so that a normal LAN connection server or an Internet connection server on the LAN is used. And other communication services of various applications.

[0188]

According to the first aspect of the present invention, there is provided a communication system constructed by connecting an interconnecting device having a plurality of base stations forming a wireless area under its control via a network, a line, or a bus. In each of the interconnecting devices, each interconnecting device has an interconnecting device identification number for identifying each other, the interconnecting device identification number, and a mobile terminal identification of a mobile terminal under the jurisdiction of the own device. First storage means for storing numbers in association with each other; second storage means for storing wireless area identification information for identifying wireless areas formed by a plurality of base stations of the own apparatus; A third storage unit for storing the current location information for each of the mobile terminals, and a mobile terminal under the jurisdiction of another device, which is currently in the wireless area of the own device. For each of them, a fourth storage means for storing the current position information, and an interconnecting device that controls the mobile terminal based on the mobile terminal identification number of the mobile terminal that has entered the wireless area of the base station provided in the own device. First determining means for determining, a first updating means for updating the current location information of the mobile terminal stored in the third storage means when the mobile terminal is determined to be under the jurisdiction of the own apparatus, If the mobile terminal is determined, the current location information of the mobile terminal is written into the fourth storage means. The second update means writes the current location information of the mobile terminal. Notification means for notifying the information, and updating the current position information of the mobile terminal stored in the third storage means when another device notifies the current position information of the mobile terminal under its control. According to the first aspect of the present invention, since the update of the wireless area information and the destination information is obligatory, each interconnection device communicates. The location of the mobile terminal in the system can be ascertained.
Since the interconnection device is mainly responsible for the mobility management of the mobile terminal, it is possible to manage where the mobile terminal is currently.

[0189] According to a second aspect of the present invention, in the interconnecting apparatus of the first aspect, the third storage means is provided when the mobile terminal under the control of the own device is presently within the wireless area of the own device. The mobile terminal identification information of the mobile terminal and the wireless area identification information indicating the wireless area to which the mobile terminal is connected are stored in association with each other, and the mobile terminal under the jurisdiction of the own device is located in the wireless area of the other device. Means for storing the mobile terminal identification information of the mobile terminal and the interconnection device identification number of the other device in association with each other.
The storage means, for a mobile terminal presently within the wireless area of its own device, the mobile terminal identification number of the mobile terminal,
According to the invention described in claim 2, the wireless area identification information indicating the wireless area to which the mobile terminal is connected is stored in association with the wireless area identification information. It can be updated as appropriate.

The invention described in claim 3 is the first invention.
2. In any of the interconnecting devices according to item 2, further comprising: an authentication key storing means for storing an authentication key of a mobile terminal under the jurisdiction of the own device; and a mobile terminal entering a wireless area of a base station provided in the own device. In the case of a mobile terminal under the jurisdiction of (1), the first authentication key obtaining means for obtaining the authentication key stored in the authentication key storage means, and the mobile terminal entering the wireless area of the base station provided in the own apparatus are controlled by the other apparatus. In the case of a terminal, the mobile terminal comprises: a second authentication key obtaining means for obtaining an authentication key from the other device; According to the third aspect of the present invention, the authentication key of the mobile terminal that has entered the wireless area of the base station can be obtained from its own device or another device.
As a result, it is possible to check whether the authentication is correct or not, so that the access right in communication can be managed.

The invention described in claim 4 is the same as that in claim 1
3. In any one of the interconnecting devices according to item 3, when any mobile terminal device within the wireless area of the own device establishes a line connection with another mobile terminal, the mobile terminal to be connected to the line is identified. Connection request receiving means for receiving a connection request including the mobile terminal identification number from within its own wireless area, and third storage means when the mobile terminal to be connected to the line is a mobile terminal under its control. And the first current position obtaining means for obtaining the current position of the mobile terminal, and when the mobile terminal to be connected to the line is a mobile terminal under the control of another device, the current position of the mobile terminal is stored in the fourth storage means. If there is, the connection source mobile terminal and the connection destination move in the own device based on the second current position obtaining means for obtaining it and the current position information obtained by the first and second current position information obtaining means. First to set the logical line between the end
If the logical line establishing means and the mobile terminal to be connected to the line are a mobile terminal under the jurisdiction of another device, and the current position of the mobile terminal does not exist in the fourth storage means, the logical terminal is established via a network or a line or bus. And a second logical line establishing means for establishing a logical line with another device that controls the mobile terminal. If the terminal is its own device, the line can be connected regardless of whether it is another device.

The invention described in claim 5 is the first invention
3. In the interconnection device according to any one of the items 3, wherein the mobile terminal device requests a connection to the application program in a line connection between the mobile terminal device and an application program on a general device including the interconnection device. Second connection request receiving means for receiving a connection request including application program information indicating an application program to be connected from a mobile terminal located in any wireless area in the communication system; and an application based on the connection request. 6. The method according to claim 5, further comprising a third logical line establishing means for establishing a logical line with the program, and a first interface means for controlling the logical line by the application program. According to the invention, in a communication system Mobile terminal located Re of wireless area is applique - can be connected to the Deployment.

The invention described in claim 6 is the first invention.
3. In the interconnection device according to any one of the items 3, when a connection is requested from an application program to the mobile terminal device in a line connection between the mobile terminal device and an application program on a general device including the interconnection device. A third connection request receiving means for receiving a connection request including a mobile terminal identification number of a mobile terminal to be connected from an application program on a general device; In the case of the terminal, the first current position obtaining means for obtaining the current position of the mobile terminal by referring to the third storage means, and in the case where the mobile terminal to be connected to the line is a mobile terminal under the control of another device, the first current position obtaining means If the current position is present in the fourth storage means, a second current position obtaining means for obtaining the current position, and first and second current position information First logical line establishing means for setting a logical line between a source mobile terminal and a destination mobile terminal in its own device based on the current position information obtained by the obtaining means; Is a mobile terminal under the jurisdiction of another device, and if the current position of the mobile terminal does not exist in the fourth storage means, establishes a logical line with the other device under the jurisdiction of the mobile terminal via a network, a line, or a bus. Second logical line establishing means, third logical line establishing means for establishing a logical line with the application program based on the connection request, and first interface means for causing the application program to control the established logical line. According to the invention of claim 6, the application program on the general device including the interconnection device is provided. G may be connected to the mobile terminal. In the development process of the application, since the interconnecting device serves as a common interface for communication of the portable device, only the access to the interconnecting device needs to be described in the application. Therefore, the description of the application is simplified, and a variety of communication services can be realized. A variety of communication services can be realized on a communication system constituted by interconnecting devices, such as sending Internet mail to a pocket phone or pager held by an employee or staff at all times, or browsing a homepage using an electronic organizer.

The invention according to claim 7 is the invention according to claims 5 to
6. The interconnection device according to claim 6, wherein the first, second,
The logical line established by the third logical line establishing means comprises a logical line between the mobile terminal device and the interconnecting device and a logical line between the interconnecting device and the application program. The data flowing on the logical line between them has a structure including identification information that can be distinguished from the data flowing on other logical lines,
The interconnecting device is characterized by comprising a logical line connecting means for connecting the two logical lines and controlling the logical lines between a plurality of mobile terminals and an application simultaneously by referring to the structure. According to the seventh aspect of the present invention, the data flowing on a logical line between the interconnection device and the application program refers to a structure including identification information that can be distinguished from data flowing on another logical line. As a result, it is possible to simultaneously control a logical line between a plurality of mobile terminals and an application.

The invention described in claim 8 is the first invention.
5. The interconnection device according to claim 3, wherein, for a mobile terminal that executes an Internet protocol (hereinafter abbreviated as IP), a fifth storage unit that stores a correspondence between a mobile terminal identification number of the mobile terminal and an IP address; 9. An apparatus according to claim 8, further comprising address conversion means for performing a mutual conversion between the mobile terminal identification number and the Internet protocol address. The mobile terminal can transmit and receive IP packets over the LAN.

According to a ninth aspect of the present invention, in the interconnecting apparatus according to the eighth aspect, a special number is designated as a connection destination mobile terminal identification number issued from a mobile terminal which is to transmit an IP packet. Third connection request receiving means for receiving the connection request from a mobile terminal located in the wireless area of the own device, and line establishing means for establishing a line between the mobile terminal as the source of the connection request and the interconnection device And IP packet extracting means for extracting an IP packet from the line established by the line establishing means, and first IP packet transmitting means for transmitting the extracted IP packet to a LAN via a LAN connection interface. This is a feature, and the cut-out IP packet can be sent out onto the LAN via the LAN connection interface.

The invention described in claim 10 is the invention according to claim 8
In the interconnection apparatus described above, an IP packet capturing means for capturing an IP packet addressed to a mobile terminal from a LAN via a LAN connection interface, and a mobile terminal identification number from a destination IP address of the captured IP packet by the address conversion means. And a line establishing means for establishing a line between the mobile terminal designated by the mobile terminal identification number obtained by the address solving means. According to the invention described in Item 10, I-addresses transmitted from the LAN and addressed to the mobile terminal are transmitted.
The mobile terminal can receive the P packet.

The invention described in claim 11 is the first invention.
3. An interconnect device according to any one of claims 1 to 3, wherein
A mobile terminal that does not perform P and UDP / IP;
In establishing communication (hereinafter referred to as non-IP communication) with an application on a general device including an interconnecting device executing CP / IP or UDP / IP, the non-I
Fourth connection request receiving means for receiving a connection request including information indicating requesting establishment of P communication and application specifying information for specifying an application to be connected from a mobile terminal device located in the wireless area of the own device A line establishing means for establishing a line between the mobile terminal and the interconnection device; and a TCP transmitted to the data transmitted from the mobile terminal in accordance with the application identification information obtained by the fourth connection request receiving means. Header generating means for attaching a generated IP packet to a target application; a second IP packet transmitting means for transmitting the generated IP packet to a target application; and a TCP, an IP header or a UDP from an IP packet returned from the application.
And a header deleting means for deleting the IP header and a data transmitting means for transmitting only the remaining data portion from which the header has been deleted on the line with the mobile terminal. According to the described invention, TCP /
A mobile terminal that does not perform IP and UDP / IP,
Communication with applications on general devices, including interconnecting devices running TCP / IP or UDP / IP, is possible.

According to a twelfth aspect of the present invention, in the interconnecting apparatus according to any one of the fifth, sixth, seventh, ninth, tenth and eleventh aspects, data flowing on a line between the mobile terminal and the interconnecting apparatus is Contains information enabling detection of a communication error and information enabling determination of retransmission data, and the interconnection device has an error in data flowing on the line between the mobile terminal and the interconnection device. In this case, a communication data reliability establishing means for detecting and recovering an error is provided. When an error occurs in flowing data, error detection and recovery can be performed.

[0200] The invention of claim 13 provides the invention of claim 4
In the interconnecting device described, when one mobile terminal moves and changes the radio area while establishing a line between the mobile terminals, the mobile terminal identification number of the relevant mobile terminal and A sixth storing the mobile terminal identification number of the mobile terminal of the connection partner and the communication mode in association with each other
Storage means, reconnection request communication means for receiving a reconnection request sent from a mobile terminal that has moved through the wireless area, and first jurisdiction device determination for specifying an interconnecting device judging the mobile terminal from the mobile terminal identification number Means, and the mobile terminal identification number and the communication mode of the mobile terminal of the connection partner stored in the sixth storage means of the jurisdiction device of the source mobile terminal of the reconnection request determined by the first judging device judging means. The first judging device judging unit specifies the first reconnection destination acquiring unit to be acquired and the interconnecting device that controls the mobile terminal of the connection partner acquired by the first reconnection destination acquiring unit. A third current position obtaining means for obtaining a current position of the mobile terminal; and a reconnection means for performing reconnection based on the position information of the reconnection destination mobile terminal obtained by the third current position obtaining means. Is obtained by the symptoms, according to the invention described in claim 13, while establishing a line between the mobile terminals can be one of the mobile terminal to change the wireless area moving.

The invention described in claim 14 is the same as claim 5
8. In the interconnection device according to any one of claims 7 to 7, when the mobile terminal moves and changes the wireless area while the mobile terminal is connected to an application program, the mobile terminal identification number of the mobile terminal under the jurisdiction Seventh storage means for storing application specifying information for specifying an application programgram to be connected to and a communication mode, and a reconnection request for receiving a reconnection request sent from a mobile terminal that has moved through the wireless area. Receiving means, first jurisdiction device judging means for identifying an interconnecting device judging the mobile terminal from the mobile terminal identification number, and judging the interconnecting device judging the mobile terminal of the source of the reconnection request by the first judging device. Means for making a determination, and acquiring the application identification information and the communication form of the connection partner held in the seventh storage means. A connection destination acquisition unit; and a reconnection unit that identifies a reconnection destination interconnect device from the application identification information of the connection partner acquired by the second reconnection destination acquisition unit and performs reconnection. Things,
According to the invention described in claim 14, in the interconnecting device according to any one of claims 5 to 7, the mobile terminal may move and change the wireless area while the mobile terminal is connected to the application program. it can.

The invention according to claim 15 is the ninth invention.
Or in any one of the interconnecting apparatuses according to 10, when a mobile terminal changes a wireless area while transmitting or receiving an IP packet, receives a reconnection request transmitted from the mobile terminal that has moved in the wireless area. A reconnection request receiving means, and a requesting mobile terminal from the reconnection request
LAN connection determining means for determining that transmission or reception of a P packet is requested, and a line for establishing a line between the mobile terminal and the interconnection device when the data is determined to be LAN connection data It is characterized by comprising connection means, and according to the invention of claim 15,
The mobile terminal can change the wireless area while transmitting or receiving IP packets.

[0203] The invention according to claim 16 is the invention according to claim 1.
2. In the interconnecting apparatus according to 1, when the mobile terminal changes the wireless area while the mobile terminal is performing non-IP communication, the mobile terminal identification number of the relevant mobile terminal is associated with the relevant mobile terminal. An eighth storage means for storing the communication form, which is non-IP communication, application specifying information for specifying an application program to be connected, and a reconnection request sent from a mobile terminal that has moved through the wireless area. Means for receiving a reconnection request,
The second jurisdiction device judging means for specifying an interconnecting device judging the mobile terminal from the mobile terminal identification number and the interconnecting device judging the mobile terminal which is the source of the reconnection request are judged by the second judging device judging device. A third reconnection destination acquiring means for acquiring the application identification information and the communication form of the connection partner held in the eighth storage means, and reconnecting from the application identification information of the connection partner acquired by the third reconnection destination acquisition means. And a reconnecting means for specifying the preceding interconnecting device and performing reconnection. According to the invention as set forth in claim 16, the mobile terminal performs non-IP communication. In addition, the mobile terminal can change the wireless area.

The invention according to claim 17 is based on claim 1
In any one of the interconnecting devices according to any one of claims 3 to 16, when updating the current position information held in the third storage unit according to claim 1 by the updating unit according to claim 1, the previous current position information is used. A ninth storage means for storing the current position information before the update, and a reference to the previous current position information stored in the ninth storage means when the reconnection is completed by the reconnection means. Position reference means, handover notification transmitting means for transmitting a handover notification for notifying the movement of the mobile terminal to the interconnecting device indicated by the previous current position referred to by the previous current position reference means, and receiving the handover notification Line release means for releasing the line used by the mobile terminal when the mobile terminal has moved, and by quickly disconnecting the line, the line opening efficiency is improved. It can be achieved.

[Brief description of the drawings]

FIG. 1 is a system diagram showing an internal hierarchy of an interconnect device according to an embodiment.

FIG. 2 is a functional block diagram showing an internal configuration of the interconnection device.

FIG. 3 is an explanatory diagram showing how each interconnect device performs movement management in the present embodiment, and shows how a process at the time of location registration is performed in this movement management. The order of this processing is indicated by a symbol.

FIG. 4 is an explanatory diagram showing how each interconnection device performs mobility management in the present embodiment, and shows how a process at the time of call connection is performed in this mobility management. The order of this processing is indicated by a symbol.

FIG. 5 is an explanatory diagram showing how each interconnection device performs mobility management in the present embodiment, and shows how a process at the time of handover is performed in the mobility management. The order of this processing is indicated by a symbol.

FIG. 6A is a diagram showing, in a table format, contents of general call area information and authentication information held by a position information holding unit 3; FIG. 5B is a diagram showing the contents of the current position information held by the position information holding unit 3 in a table format.

FIG. 7 is a diagram showing contents of communication mode information held by a communication mode holding unit 5 in a table format.

FIG. 8 is a diagram showing contents of address information held by an address information holding unit in a table format.

FIG. 9A is an explanatory diagram illustrating a state in which a mobile terminal performs location registration with an interconnecting device. (B) It is explanatory drawing explaining the mode that a mobile terminal hands over between interconnection devices.

FIG. 10 (a) RCR in the interconnect device of the present embodiment
It is a list of extended primitive examples of STD-28. (B) A list of example protocol messages between the interconnecting devices of the present embodiment. (C) A list of interface examples with application programs in the interconnection device of the present embodiment.

FIG. 11 is an example of a message format common to the protocol messages and primitives shown in FIGS. 10 (a) to (c).

FIG. 12 is a flowchart showing processing of the position information holding unit 3 at the time of position registration.
Are attached.

FIG. 13 is a flowchart showing a process of the location information holding unit 3 at the time of call connection, and each step is denoted by a reference character of a capital letter “G”.

FIG. 14 is a flowchart illustrating processing performed by a wireless communication control unit.

FIG. 15 is a flowchart illustrating processing performed by a wireless communication control unit.

FIG. 16 is a main flow chart of the logical line control unit 1, in which each step is denoted by a reference character of an upper case “A”.

FIG. 17 is a flowchart showing processing between mobile terminals in a wireless area of the same interconnecting device, and each step is denoted by a capital “B” reference number;

FIG. 18 is a flowchart showing a process between mobile terminals in a wireless area of different interconnecting devices, and each step is denoted by a capital letter “C”.

FIG. 19 is a flowchart when a connection is made from an application to a mobile terminal, and each step is denoted by a capital “D” reference symbol.

FIG. 20 is a flowchart in a case where a connection is made from a mobile terminal to an application, and each step is denoted by a reference character of an uppercase “E”.

FIG. 21 is a communication sequence when a call connection is made between mobile terminals within the wireless area of the same interconnection device.

FIG. 22 is a communication sequence when a call is established between mobile terminal devices spanning the interconnection device of the present embodiment.

FIG. 23 is a sequence in a case where a connection is made from an application to a mobile terminal.

FIG. 24 is a sequence in a case where connection from a mobile terminal to an application is performed.

FIG. 25 is a sequence in a case where connection from a mobile terminal to a LAN communication server is performed.

FIG. 26 is a communication sequence at the time of handover of a mobile terminal.

FIG. 27 is a flowchart showing the processing of the logical line control unit 1 in the interconnecting device on the side where the mobile terminal has entered, and each step is denoted by a capital letter “J”. .

FIG. 28 is a flowchart showing processing of the mobile terminal on the communication partner side at the time of handover, and each step is denoted by a reference symbol of a capital letter “J”.

FIG. 29 is a communication sequence at the time of handover of a mobile terminal.

FIG. 30 is a diagram showing a format of a call setup message issued by a mobile terminal according to the present embodiment.

FIG. 31 is a diagram showing a format of a connection notification message in the present embodiment.

FIG. 32 is a diagram showing a library function provided to an application program in the present embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Logical line control part 2 Cluster number holding part 3 Location information holding part 4 Address information holding part 5 Communication form holding part 6 Information exchange part 9 Wireless communication control part 11 Interconnection device 12 Interconnection device 13 Interconnection device 14 Interconnection device 15 Interconnection device 30 Wireless interface card 31 ISDN / PSTN interface card 34 Ethernet card 35 LAN communication control unit 36 Communication server 37 Internet connection unit 38 Handover notification transmitting unit 39 Handover notification receiving unit 40 Process management unit 51 Individual arrival notification primitive 52 incoming call response primitive 58 reconnection response message 61 connection request message 62 incoming response message 63 connection response message 64 disconnection request message 65 disconnection response message 66 connection rejection message 67 reconnection Connection request message 68 Reconnection response message 69 Reconnection rejection message 70 Paging message 71 Handover notification message 72 Additional information message 73 Connection instruction primitive 74 Incoming response primitive 75 Connection confirmation primitive 76 Incoming notification primitive 77 Incoming instruction primitive 78 Incoming confirmation primitive 79 Disconnect instruction primitive 80 Disconnect confirmation primitive 81 Disconnect notification primitive 82 Additional information primitive 101 Logical line control unit 201 Logical line control unit 209 Wireless communication control unit 240 Process management unit 1101 Mobile terminal device 1102 Mobile terminal device 1201 Mobile terminal device 1301 Mobile terminal device 1401 Mobile terminal device

──────────────────────────────────────────────────続 き Continuing on the front page (51) Int.Cl. ⁶ Identification code FI H04Q 3/545 H04L 11/20 B (72) Inventor Noboru Nagacho 1006 Ojidoma, Kadoma City, Osaka Prefecture Matsushita Electric Industrial Co., Ltd.

Claims (17)

[Claims] 1. A communication system constructed by connecting interconnecting devices having a plurality of base stations forming a wireless area under their control via a network, a line, or a bus. The device has an interconnecting device identification number for identifying each other, and stores the interconnecting device identifying number and the mobile terminal identification number of the mobile terminal under the jurisdiction of the own device in association with each other and stores the first storage. Means, second storage means for storing wireless area identification information for identifying a wireless area formed by each of the plurality of base stations of the own apparatus, and current position information for each of the mobile terminals under the control of the own apparatus. And a third storage unit that performs the control of the current position of each of the mobile terminals that are under the jurisdiction of another device and that are presently within the wireless area of the own device. Fourth storage means for storing information; first determination means for determining an interconnecting device that has jurisdiction over the mobile terminal from a mobile terminal identification number of a mobile terminal that has entered a wireless area of a base station provided in the own device; When it is determined that the mobile terminal is under the jurisdiction of the own device, first updating means for updating the current location information of the mobile terminal stored in the third storage means, and when it is determined that the mobile terminal is under the jurisdiction of another device, The second to write the current location information of the mobile terminal into the fourth storage means
Updating means, when it is determined that the mobile terminal has jurisdiction over another device, notification means for notifying the other device of the current location information of the mobile terminal, and notification of the current location information of the mobile terminal under its jurisdiction from the other device. And an updating device for updating the current location information of the mobile terminal stored in the third storage device. 2. The interconnection device according to claim 1, wherein:
The third storage means, when the mobile terminal under the jurisdiction of the own device is present in the wireless area of the own device, the mobile terminal identification information of the mobile terminal;
The mobile terminal stores the wireless terminal identification information indicating the wireless area to which the mobile terminal is connected in association with the mobile terminal. If the mobile terminal under its control is presently within the wireless area of another device, the mobile terminal moves. Terminal identification information;
The fourth storage means is a means for storing the interconnecting device identification numbers of the other devices in association with each other, and for a mobile terminal currently present in the wireless area of the own device, the mobile terminal identification number of the mobile terminal; An interconnecting device characterized by means for storing wireless area identification information in association with each other. 3. The interconnection device according to claim 1, further comprising: an authentication key storage unit configured to store an authentication key of a mobile terminal under its control, and a wireless area of a base station provided by the own device. When the entered mobile terminal is a mobile terminal under the jurisdiction of the own device, the first authentication key obtaining means for obtaining an authentication key stored in the authentication key storage means, and the mobile terminal has entered a wireless area of a base station provided in the own device. When the mobile terminal is a mobile terminal under the jurisdiction of another device, a second authentication key obtaining means for obtaining an authentication key from the other device, and a mobile terminal entering the wireless area of the base station provided in the own device. An interconnection apparatus comprising: an authentication unit for performing authentication. 4. The interconnecting device according to claim 1, further comprising: a line connecting any one of the mobile terminals within the wireless area of the own device to another mobile terminal. First connection request receiving means for receiving a connection request including a mobile terminal identification number for identifying a mobile terminal to be connected from within its own wireless area; In the case of a mobile terminal, first current position obtaining means for obtaining the current position of the mobile terminal by referring to the third storage means, and in the case where the mobile terminal to be connected to the line is a mobile terminal under the control of another device, the mobile terminal If the current position is present in the fourth storage means, the second current position obtaining means for obtaining the current position, and the current position information obtained by the first and second current position information obtaining means, in its own device. First logical line establishing means for setting a logical line between the connection source mobile terminal and the connection destination mobile terminal; and the mobile terminal to be connected to the line is a mobile terminal under the jurisdiction of another device, and the current position of the mobile terminal. And a second logical line establishing means for establishing a logical line with another device that controls the mobile terminal via a network, a line, or a bus if the logical line does not exist in the fourth storage means. Connection device. 5. The interconnecting apparatus according to claim 1, wherein the application program is transmitted from the mobile terminal to a line connection between the mobile terminal and an application program on a general device including the interconnecting apparatus. Second connection request receiving means for receiving a connection request including application program information indicating an application program to be connected from a mobile terminal located in any wireless area in the communication system A third logical line establishing means for establishing a logical line with an application program based on the connection request; and a first interface means for controlling the logical line by the application program. Interconnect device. 6. The interconnecting device according to claim 1, wherein a line connection between the mobile terminal device and an application program on a general device including the interconnecting device is transmitted from an application program to the mobile terminal device. A connection request including a mobile terminal identification number of a mobile terminal to be connected from an application program on a general device; and a line connection from now on. If the mobile terminal to be connected is a mobile terminal under the jurisdiction of its own device, the first current position obtaining means for obtaining the current position of the mobile terminal by referring to the third storage means; In the case of a mobile terminal, if the current position of the mobile terminal exists in the fourth storage means, the second current position obtaining means for obtaining the current position. A first logical line establishing means for setting a logical line between a source mobile terminal and a destination mobile terminal in its own device based on the current position information obtained by the first and second current position information obtaining means If the mobile terminal to be connected to the line is a mobile terminal under the jurisdiction of another device and the current position of the mobile terminal does not exist in the fourth storage means, the mobile terminal under the jurisdiction of the mobile terminal via a network, a line, or a bus. A second logical line establishing means for establishing a logical line with another device to be connected, a third logical line establishing means for establishing a logical line with an application program based on the connection request, An interconnection device comprising: a first interface means for controlling a program. 7. The interconnection device according to claim 5, wherein the logical line established by the first, second, and third logical line establishment means is a logical circuit between the mobile terminal device and the interconnection device. A line, an interconnecting device, and a logical line between the application program. An interconnecting device having a logical line connecting means for connecting between the two logical lines and referring to the structure to simultaneously control the logical lines between a plurality of mobile terminals and an application; An interconnect device characterized by the following: 8. The interconnection device according to claim 1, wherein, for a mobile terminal that executes an Internet protocol (hereinafter abbreviated as IP), a correspondence between a mobile terminal identification number of the mobile terminal and an IP address is determined. An interconnection apparatus comprising: a fifth storage unit for storing; and an address conversion unit for performing a mutual conversion between the mobile terminal identification number and an Internet protocol address. 9. The interconnection device according to claim 8, wherein
A third connection request for receiving, from a mobile terminal located in its own wireless area, a connection request issued from a mobile terminal that is to send an IP packet and having a special number specified as a mobile terminal identification number of a connection destination; Receiving means, a line establishing means for establishing a line between the mobile terminal as the source of the connection request and the interconnecting apparatus, an IP packet extracting means for extracting an IP packet from the line established by the line establishing means, An interconnecting device comprising: first IP packet sending means for sending the cut-out IP packet onto a LAN via a LAN connection interface. 10. The interconnecting device according to claim 8, wherein an IP packet capturing means for capturing the IP packet addressed to the mobile terminal from the LAN via the LAN connection interface, and transmitting the IP packet captured by the address converting means. Address resolution means for converting the destination IP address into a mobile terminal identification number; and line establishment means for establishing a line between the mobile terminal specified by the mobile terminal identification number obtained by the address resolution means. Interconnect device characterized. 11. The interconnection device according to claim 1, wherein the mobile terminal device does not execute TCP / IP and UDP / IP, and the mobile terminal device does not execute TCP / IP or UDP / I.
Communication with an application on a general device including an interconnect device that executes P (hereinafter referred to as non-IP communication)
Receiving a connection request including information indicating requesting establishment of the non-IP communication and application specifying information for specifying an application to be connected from a mobile terminal device located in a wireless area of the own device. A fourth connection request receiving unit, a line establishing unit for establishing a line between the mobile terminal and the interconnection device, and an application identification obtained by the fourth connection request receiving unit in data transmitted from the mobile terminal. Depending on the information,
Header generation means for attaching TCP and IP header or UDP and IP header; second IP packet transmission means for transmitting the generated IP packet to a target application; and TCP and IP header or An interconnection apparatus comprising: header deletion means for deleting a UDP and an IP header; and data transmission means for transmitting only a remaining data portion from which a header has been deleted to a line with the mobile terminal. 12. The interconnection device according to claim 5, wherein data flowing on a line between the mobile terminal and the interconnection device can detect a communication error. The interconnecting device includes information for enabling the determination of the retransmission data and the data to be transmitted, and the interconnecting device detects and recovers from the error when an error occurs in the data flowing on the line between the mobile terminal and the interconnecting device. An interconnecting device comprising communication data reliability establishing means for performing the following. 13. The interconnecting device according to claim 4, wherein when one of the mobile terminals moves and changes the radio area while a line is being established between the mobile terminals, the mobile terminal under the jurisdiction is controlled. Sixth storage means for storing the mobile terminal identification number of the mobile terminal to be connected and the communication mode in association with the mobile terminal identification number of the mobile terminal; and a reconnection request sent from the mobile terminal that has moved through the wireless area. Reconnection request communication means for receiving, first judging device judging means for specifying an interconnecting device judging the mobile terminal from the mobile terminal identification number, transmission of the reconnection request judged by the first judging device judging means First reconnection destination acquisition means for acquiring the mobile terminal identification number and communication mode of the mobile terminal of the connection partner held in the sixth storage means of the jurisdiction device of the former mobile terminal; The first judging device judging unit specifies an interconnecting device that has jurisdiction over the mobile terminal of the connection partner acquired by the third judging device, and obtains the current position of the mobile terminal from the interconnecting device; An interconnection apparatus comprising: reconnection means for performing reconnection based on position information of a reconnection destination mobile terminal obtained by a current position acquisition means. 14. The interconnection device according to claim 5, wherein the mobile terminal moves and changes a wireless area while the mobile terminal is connected to an application program, Seventh storage means for storing application identification information for identifying an application program to be connected to and a communication mode in association with the mobile terminal identification number of the mobile terminal under its jurisdiction; Reconnection request receiving means for receiving a connection request, first judging device judging means for specifying an interconnecting device judging the mobile terminal from the mobile terminal identification number, and interconnecting jurisdiction for the mobile terminal that has transmitted the reconnection request The first judging device judging means judges the device, and the application identification information of the connection partner held in the seventh storage means Second reconnection destination acquiring means for acquiring a communication mode, and reconnection means for identifying a reconnection destination interconnecting device from application identification information of a connection partner acquired by the second reconnection destination acquiring means and performing reconnection. An interconnect device comprising: 15. The interconnection device according to claim 9, wherein when the mobile terminal changes the wireless area while transmitting or receiving an IP packet, the mobile terminal moves from the wireless area. Reconnection request receiving means for receiving the reconnection request to be sent, and LAN connection determination means for determining from the reconnection request that the requesting mobile terminal has requested transmission or reception of an IP packet, An interconnection apparatus comprising: line connection means for establishing a line between a mobile terminal and the interconnection apparatus when the data is determined to be LAN connection data. 16. The interconnecting device according to claim 11, wherein, when the mobile terminal changes the wireless area while the mobile terminal is performing non-IP communication, the mobile terminal having jurisdiction moves the mobile terminal under jurisdiction. Eighth storage means for storing non-IP communication by associating with a terminal identification number, application specifying information for specifying an application program to be connected and communication mode, and transmission from a mobile terminal moving in a wireless area Request receiving means for receiving a reconnection request to be made, second judging device judging means for specifying an interconnecting device judging the mobile terminal from the mobile terminal identification number, and judging the mobile terminal from which the reconnection request was sent. The second judging device judging means judges the interconnection device to be connected, and communicates with the application identification information of the connection partner held in the eighth storage means. Third reconnection destination acquiring means for acquiring the status, and reconnection means for identifying a reconnection destination interconnection device from the application identification information of the connection partner acquired by the third reconnection destination acquisition means and performing reconnection. An interconnect device comprising: 17. The interconnection device according to claim 13, wherein the current position information stored in the third storage unit according to claim 1 is updated by the update unit according to claim 1. A ninth storage means for storing the current position information before updating as the previous current position information; and a previous current information stored in the ninth storage means when the reconnection is completed by the reconnection means. A previous current position reference unit that refers to position information; An interconnecting device comprising: a line releasing unit that releases a line used by a mobile terminal that has moved when receiving the handover notification.