JP2003070043A - Communication system, communication connectivity assurance method, and communication continuity assurance method - Google Patents

Abstract

(57) [Problem] To provide connectivity and continuity of communication when a dual-type information wireless communication terminal that can use both of them moves between information communication networks that provide a plurality of different wireless access technologies. And the convenience of the information wireless communication terminal is improved. A common position information management device that manages a dual-type information wireless communication terminal that uses a plurality of wireless access technologies without depending on a wireless access technology is installed in a signaling plane. An identifier capable of uniquely identifying the dual type information wireless communication terminal 1 is registered in the common position information management device 14. Further, a common resource management device 6 capable of managing resources of communication calls in the dual information wireless communication terminal 1 during communication, and a common mobility management device performing mobility management of the dual information wireless communication terminal 1 during communication 7 are provided in common among a plurality of information communication networks.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to information when a dual type information wireless communication terminal capable of using a plurality of wireless access technologies moves between communication networks providing a plurality of different wireless access technologies. The present invention relates to a communication system, a communication connectivity guarantee method, and a communication continuity guarantee method by which a communication network operator can guarantee communication connectivity and communication continuity to its information wireless communication terminal.

[0002]

2. Description of the Related Art At present, a plurality of high-speed access infrastructures (for example, xDSL, third generation mobile communication, wireless LAN, etc.) are rapidly spreading. In such a situation, operators are expected to realize a “ubiquitous communication network”. In ubiquitous communication here, user terminals can access multiple high-speed access infrastructures without being restricted to the location in which they are located and with service interoperability guaranteed without changing the specifications of the user terminals. Refers to simple communication.

In the conventional technology, the same radio access technology is used, and the communication connectivity can be guaranteed between the mobile communication carriers having the same position information database structure, but a plurality of different radio access technologies are used. It was not possible to guarantee the connectivity and continuity of communications between mobile communication carriers with different location information database structures.

[0004]

In the prior art, for a dual type information wireless communication terminal which can use a plurality of wireless access technologies, a position information database structure possessed by a plurality of information communication networks (communication business network) is provided. Therefore, it was not possible to guarantee communication connectivity when moving between information communication networks that provide different wireless access technologies. In addition, a function capable of managing resource of communication call in the dual type information wireless communication terminal in communication and a function of performing mobility management of the information wireless communication terminal in communication are independent in each of the plurality of information communication networks. Since it was managed by the Internet, it was not possible to guarantee the continuity of communication when moving between information communication networks that provide multiple different wireless access technologies.

An object of the present invention is to provide a common location information management function which does not depend on the wireless access technology, and a common resource management which enables communication carriers to provide resource management for communication calls. Functions and information During communication, a common mobility management function that can perform mobility management of wireless communication terminals can be installed in each communication network to ensure connectivity and continuity of communication. It is to improve the convenience of a wireless communication terminal.

[0006]

SUMMARY OF THE INVENTION According to the present invention, a dual type information wireless communication terminal which can use an information communication network providing a plurality of wireless access technologies can restrict a geographical position without changing specifications. By mutually utilizing the location information database function provided by multiple information communication networks without receiving the communication, it is possible to guarantee communication connectivity when moving between information communication networks providing different wireless access technologies. It is a thing.

In addition to the above-mentioned functions, a function capable of managing resource of communication call in the dual type information wireless communication terminal in communication and a function of performing mobility management of the dual type information wireless communication terminal in communication By having and in common among a plurality of information communication networks, it is possible to guarantee the continuity of communication when moving between information communication networks providing a plurality of different radio access technologies.

In order to solve the problem of guaranteeing the connectivity and continuity of communication between information communication networks having different wireless access technologies of dual type information wireless communication terminals that can use a plurality of wireless access technologies, A network form in which the signaling plane and the transport plane of the network are separated is applied.

An apparatus for managing a dual type information wireless communication terminal that uses a plurality of radio access technologies without depending on the radio access technologies is installed on the signaling plane. Specifically, since the conventional location information database structures of a plurality of information communication networks are different structures, when a dual type information wireless communication terminal moves between information communication networks providing a plurality of different wireless access technologies. , A location information management device common to multiple radio access technologies that can hide information specific to the radio access technologies of multiple information communication networks and can register information that does not depend on the radio access technology is installed in the signaling plane. Then, by registering an identifier capable of uniquely identifying the dual type information wireless communication terminal in this common location information management device, communication connectivity is guaranteed.

Further, a device capable of performing resource management of communication calls in a dual type information wireless communication terminal during communication which has been independently managed by a plurality of conventional information communication networks,
A device that performs mobility management of a dual type information wireless communication terminal during communication and a device that commonly manages between information communication networks that provide a plurality of different wireless access technologies are also installed in the signaling plane, so that a plurality of different wireless To ensure continuity of communication when a dual type information wireless communication terminal moves between information communication networks that provide access technology.

On the other hand, in the transport plane, a protocol (eg IP) that does not depend on the radio access technology provided by the communication carrier is used, and by linking with each function of the transport plane, a plurality of different radios can be used. It is possible to guarantee the continuity and connectivity of communication between access technologies.

[0012]

1 is a system configuration diagram of an embodiment of the present invention. The system of FIG. 1 is configured by a device that handles a signaling plane and a device that handles a transport plane. The signaling plane is a plane that handles only control signals between the information wireless communication terminal and each management device and between each management device, and the transport plane is a data plane without considering the functions of the information wireless communication terminal and each management device. It is a plane that executes the transmission of packets to the destination faithfully.

In the system shown in FIG. 1, a radio access technology such as a PDC method or a PHS method using the TDMA technology, a third generation mobile communication method using the DS-CDMA technology or a wireless LAN method using the FH-CDMA technology is used. The dual type information wireless communication terminal 1 capable of handling a plurality of radio access technologies having different layer 1 and layer 2 technologies is used.

The transport plane has an IP (Inter
An information communication network 2 (hereinafter referred to as an information communication network A) that provides a wireless access technology a using a net protocol, an information communication network 3 (hereinafter referred to as an information communication network B) that provides a wireless access technology b, A radio layer terminating device terminating layer 1 and layer 2 of radio access technology a and a radio layer terminating device 5 terminating layer 1 and layer 2 of radio access technology b are installed.

In the signaling plane, a common resource management device 6 capable of commonly managing communication resources between both information communication networks providing a plurality of different radio access technologies, and a plurality of different radio access technologies A common mobility management device 7 that can perform mobility management of communication calls that are being commonly communicated between the information communication networks that provide The common resource management device 6 and the common mobility management device 7 are connected by communication infrastructure devices 8 and 9 capable of functioning in cooperation with a device handling a transport plane, respectively.

The location information management device (aa) 10 can conceal the information unique to the radio access technology a provided in the information communication network A and discriminate an identifier capable of uniquely identifying the information radio communication terminal 1. The location information management device (bb) 11 conceals the information unique to the radio access technology b provided in the information communication network B and determines an identifier that can uniquely identify the information wireless communication terminal 1. It is a device that can Position information management device 10 and position information management device 11
Are connected to the information communication networks A and B by the communication infrastructure devices 12 and 13, respectively.

The common location information management device 14 can register an identifier capable of uniquely identifying the information wireless communication terminal 1 discriminated by the location information management devices 10 and 11 of each access infrastructure. And a device capable of performing common position information management for the information communication network B. The position information management device 10 and the position information management device 11 are different from the common position information management device 14 in that the communication infrastructure device 15,
Connected at 16. This system is constructed with a system that can realize the above-mentioned function cooperation.

FIG. 2 is a connection procedure diagram of the embodiment of the present invention (method for guaranteeing communication connectivity). A specific service is a roaming service.

In FIG. 2, the dual type information radio communication terminal 1 uses the access technology from the mobile information communication network A which provides the DS-CDMA radio access technology to the fixed information communication network B which provides the FH-CDMA radio access technology. Change (L1).

The information wireless communication terminal 1 is a fixed information communication network B.
Is notified of the movement between the information communication networks (L2). In that case, the location information management device 11 in the fixed information communication network B hides the information unique to the wireless access technology possessed by the fixed information communication network B (L3), and the common location information management device 14 tells the fixed information communication network B about the fixed information communication network B. Notification of movement between information and communication networks (L4),
Wireless access layer 1 or layer 2 of the information wireless communication terminal 1
An identifier that can uniquely identify the information wireless communication terminal 1 between different information communication networks without depending on the above technology is registered in the common location information management device 14 (L5).

After that, a request for deleting the information of the information wireless communication terminal 1 registered in the mobile information communication network A before the movement is made (L6), and the position information management device 1 in the mobile information communication network A is requested.
The information of the information wireless communication terminal 1 is deleted from 0 (L7), and the common location information management device 14 is notified (L8). afterwards,
The information wireless communication terminal 1 is notified of registration completion (L9). This guarantees the communication connectivity of the same information wireless communication terminal 1.

FIG. 3 is a connection procedure diagram of the embodiment of the present invention (method for guaranteeing continuity of communication). A handover service is a specific service.

In FIG. 3, the information wireless communication terminal 1 wirelessly accesses the mobile information communication network A which provides the DS-CDMA wireless access technology to the fixed information communication network B which provides the FH-CDMA wireless access technology during communication. Change technology (M1).

The information wireless communication terminal 1 is a fixed information communication network B.
Is notified to the information communication network (M2). In this case, the common mobility management device 7 that commonly manages the mobility of the information wireless communication terminal 1 for the mobile information communication network A and the fixed information communication network B does not depend on the wireless technology of the transport in the signaling plane, and The movement of the wireless communication terminal 1 between the information communication networks is detected (M3), and for the mobile information communication network A and the fixed information communication network B, the information communication networks A and B that do not depend on the wireless technology of the transport are used in the signaling plane. In contrast, the common resource management device 6 that manages the resources of the common communication network is notified of the movement of the information wireless communication terminal 1 (M
4).

The common resource management device 6 that has received the notification
Is the mobile information communication network A before the information wireless communication terminal 1 moves.
Network resource information used in (for example, QoS and CODE
(C information) and the resource information of the fixed information communication network B after the movement are searched, and an appropriate resource usable by the information wireless communication terminal 1 is allocated (M5). The resource information allocated by the common resource management device 6 is notified to the common mobility management device 7 (M6), and the information wireless communication terminal 1 is notified that it can move (M7).

The information wireless communication terminal 1 that has received the notice of movement possibility returns a response to the common mobility management device 7 (M8), and the common mobility management device 7 transfers the response to the common resource management device 6 (M9). The common resource management device 6 releases the resources of the mobile information communication network A used by the information wireless communication terminal 1 before moving (M10).

An apparatus configuration for realizing the above procedure is
The part for realizing roaming and the part for realizing handover will be described in more detail.

FIG. 4 is a block diagram showing the internal structure of the common position information management device and the position information management device. The common position information management device 14 includes a common position information management database (DB) 141 and a position information registration / deletion execution unit 142.
And a transmitter / receiver 143. The position information registration / deletion execution unit 142 executes a process of registering the position information of the information wireless communication terminal 1 in the common position information management DB 141 and a process of deleting it from the common position information management DB 141. The transmission / reception unit 143 transmits / receives control information to / from the position information management devices 10 and 11 via the communication infrastructure devices 15 and 16.

The position information management devices 10 and 11 are devices that are uniquely provided for the respective information communication networks A and B, and are respectively transmitting / receiving sections 101 and 111, position information management databases (DB) 102 and 112, and position information registration. / Delete execution part 1
03, 113, communication network (A, B) transceivers 104, 11
Have 4. The transceivers 101 and 111 communicate with the common location information management device 14. The position information registration / deletion execution units 103 and 113 execute a process of registering the position information of the information wireless communication terminal 1 in the position information management DBs 102 and 112 and a process of deleting the position information management DBs 102 and 112 from the position information management DBs 102 and 112. The communication network (A, B) transmission / reception units 104, 114 transmit / receive control information to / from their own communication networks A, B, respectively.

FIG. 5 shows a configuration example of the position information management DB and the common position information management DB. Location information management device 10,
As shown in FIG. 5 (A), the position information management DBs 102 and 112 possessed by 11 are the information wireless communication terminal 1 in each communication network.
A terminal identifier that can uniquely identify (eg: aa@bb.mobile),
It manages the position information of the information wireless communication terminal 1, the identifier of the common position information management DB 141 of the common position information management device 14, and the authentication information used in each information communication network.

The identifier of the information wireless communication terminal 1 needs to be commonly identified in both the information communication network A and the information communication network B. Therefore, an identifier capable of uniquely identifying the information wireless communication terminal 1 is assigned to the information wireless communication terminal 1 when the user makes a service contract in the information communication network with which the user makes a subscriber contract. To be given to. That is, the location information management device 10 gives a unique identifier to the information wireless communication terminal 1 to a user who makes a subscriber contract to the information communication network A.

The position information of the information wireless communication terminal 1 in the position information management DB 102, 112 has different information contents depending on the management policy of each information communication network A, B. For example, it is information unique to the radio access technology such as the identifiers of the base station, subscriber accommodation station, and gateway accommodation station. Further, the authentication information includes an authentication key and an authentication algorithm used in each information communication network, which is also information dependent on the wireless access technology. The position information registration / deletion execution units 103 and 113 in the position information management devices 10 and 11 access the position information management DBs 102 and 112 and do not notify the common position information management device 14 of these information. , Conceal information unique to wireless access technology.

The common position information management DB 141 possessed by the common position information management device 14 is, as shown in FIG.
A terminal identifier (eg, aa@bb.mobile) that can uniquely identify the information wireless communication terminal 1 in each communication network and position information of the information wireless communication terminal 1 are managed. As this position information, the position information management DB 10 of each information communication network that can be identified by each information communication network
It has 2,112 identifiers.

The flow of roaming processing from the information communication network A to the information communication network B using different radio access technologies will be described with reference to the flowchart shown in FIG.

First, the information wireless communication terminal 1 issues a roaming request to the information communication network B (step S1). In the information communication network B, the communication network B transmitting / receiving unit 1 of the position information management device 11
14 receives the roaming request (step S2). The communication network B transmitter / receiver 114 notifies the position information registration / deletion execution unit 113 of the roaming request (step S3). The location information registration / deletion execution unit 113 uses the location information management DB 1
12 is selected, and the authentication information of the information wireless communication terminal 1 is acquired (step S4). Authentication is performed using the acquired authentication information, and if the authentication is successful, the process proceeds to step S6. If the authentication fails, roaming is disabled (step S5). If the authentication is successful, the location information registration / deletion execution unit 113 causes the transmission / reception unit 111 and the communication infrastructure device 16
A position information registration request is made to the common position information management device 14 via the (step S6).

The common position information management device 14 includes a transmitting / receiving unit 1
43 receives the position information registration request (step S7), and notifies the position information registration / deletion execution unit 142 of the roaming request (step S8). The location information registration / deletion execution unit 142 selects the common location information management DB 141 (step S9), and registers the identifier of the information wireless communication terminal 1 and the identifier of the location information management DB 112 of the information communication network B in the common location information management DB 141. (Step S10).

Next, the position information registration / deletion execution unit 142 of the common position information management device 14 makes an information deletion request to the position information management DB 102 of the information communication network A (step S1).
1). In the location information management device 10, when the transmission / reception unit 101 receives the information deletion request, the location information registration / deletion execution unit 103 causes the location information management DB 102 of the information communication network A.
The information of the information wireless communication terminal 1 is deleted (step S12). After that, the location information registration / deletion execution unit 103 of the information communication network A notifies the location information registration / deletion execution unit 142 of the common location information management device 14 of the completion of the deletion via the transmission / reception unit 101 (step S13).

The position information registration / deletion execution unit 142 of the common position information management device 14 makes a position information update request to the information communication network B (step S14). When the position information management device 11 of the information communication network B receives the position information update request via the transmission / reception unit 111, the position information registration / deletion execution unit 113 relates to the information wireless communication terminal 1 of the position information management DB 112 of the information communication network B. The information is updated (step S15). As a result, the "position information of the information wireless communication terminal 1" and the "identifier of the common position information management DB 141" are stored in the position information management DB1.
12 is registered. Location information registration / deletion execution unit 113
Notifies roaming OK to the requesting information wireless communication terminal 1 via the communication network B transmitter / receiver 114 (step S).
16). As described above, roaming from the information communication network A to the information communication network B using different radio access technology is performed.

FIG. 7 is a block diagram showing the internal configuration of the common resource management device and the common mobility management device. The common resource management device 6 includes a communication network bandwidth information management database (DB) 61 and an SLA information management database (DB).
62 and CODEC information management database (DB) 63
A function distribution unit 64, a communication network A transmission / reception unit 65,
The communication network B transmitting / receiving unit 66 is provided. The common mobility management device 7 also includes a handover executing unit 71, a function allocating unit 72, a communication call mapping unit 73, a communication network A transmitting / receiving unit 74, and a communication network B transmitting / receiving unit 75.

FIG. 8 shows an example of the structure of the database of the common resource management device. Communication network band information management DB 61
Is a database that manages the used bandwidth state of each information communication network, and as shown in FIG. 8A, is a communication network identifier that uniquely identifies each information communication network and is currently used in each information communication network. The bandwidth capacity information is managed in association with the existing bandwidth capacity information.
The SLA information management DB 62, as shown in FIG.
The identifier of the information wireless communication terminal 1 and the SLA (Service Level Agreement) information contracted by the information wireless communication terminal 1 are managed in association with each other. The SLA information is the information wireless communication terminal 1
Is information on service conditions contracted by, such as minimum bandwidth capacity, maximum bandwidth capacity, and average bandwidth capacity. The CODEC information management DB 63 is shown in FIG.
As shown in (C), the CODEC information supported by each information communication network is managed in association with each communication network identifier.

Further, the communication call mapping unit 73 of the common mobility management device 7 uses the S acquired from the common resource management device 6.
It manages information such as LA information, CODEC information, and communication link identifiers of handover source / handover destination.

The flow of handover processing from the information communication network A to the information communication network B using different radio access technologies will be described with reference to the flowchart shown in FIG.

First, the information wireless communication terminal 1 issues a handover request to the information communication network B (step S20). The information communication network B transmitting / receiving unit 75 of the common mobility management device 7 receives the handover request (step S21). Upon receiving the handover request, the function allocating unit 72 of the information movement management device 7 selects the handover executing unit 71 (step S22). The handover executing unit 71 executes a handover between the information communication networks A and B (step S2).
3).

First, the communication call mapping unit 73 through the function distribution unit 72 causes the handover source (information communication network A).
The communication link of is secured (step S24). The function allocation unit 64 of the common resource management device 6 receives the handover request via the function allocation unit 72 of the common mobility management device 7 (step S25). In the common resource management device 6, the SLA information management D is performed via the function distribution unit 64.
Select B62 to obtain the requested bandwidth information (step S
26). Next, the communication network band information management DB 61 is selected via the function distribution unit 64 (step S27), the communication band band information management DB 61 is searched for the used band state of the handover destination (information communication network B), and the available band is calculated. Information is acquired (step S28).

In the obtained available bandwidth information of the information communication network B, it is judged whether or not the requested service condition (SLA) is satisfied (step S29), and if it is not satisfied, the handover is not permitted. If satisfied, the CODEC information management DB 63 is then sent via the function distribution unit 64.
Is selected to search the CODEC information management DB 63 (step S30). Based on the search result, the information communication network B determines whether or not the requested CODEC is supported (step S31). If the requested CODEC is not supported, the handover is not possible.

When the requested CODEC is supported, the function allocation unit 72 of the common mobility management device 7 receives the resource status via the function allocation unit 64 of the common resource management device 6 (step S32). In the common mobility management device 7, the communication call mapping unit 73 stores the bandwidth information, C
The ODEC information is notified (step S33). The communication call mapping unit 73 that has received each information selects the link of the handover destination (information communication network B) that satisfies the content described in the information, and maps the handover communication call (step S34). The common mobility management device 7 notifies the requesting information wireless communication terminal 1 of the handover OK via the communication network B transmitting / receiving unit 75 (step S35). As described above, the handover from the information communication network A using the different radio access technology to the information communication network B is performed.

In order to clarify the features of the present invention, the results of comparative evaluation of a generally considered function deployment model and the function deployment model according to the present invention will be described below.

In order to realize the function of guaranteeing communication connectivity when the information wireless communication terminal moves between a plurality of access networks and core networks, the information communication network uses the position information of the information wireless communication terminal as a database. Location management that enables management and appropriately routes to the roaming location of the information wireless communication terminal
A function (hereinafter abbreviated as LM) is required. In order to realize the function of guaranteeing the continuity of communication, the above-mentioned LM
In addition, resource management that manages the resource status of communication calls
(Resource Management) function (hereinafter abbreviated as RM)
And a mobility management function (hereinafter abbreviated as MM) that manages the movement of the information wireless communication terminal during communication.

FIG. 10 shows an example of the LM function deployment model. Generally, as an LM function deployment model, as shown in FIG.
The model shown in FIG. 10A and the model shown in FIG. 10B are possible. Here, for convenience, the model shown in FIG. 10A is the LM separation type model, and the model shown in FIG. 10B is the LM model.
It is called a common type model.

The LM separation type model is a model in which an LM is arranged in each access infrastructure. With this model, every time access is changed, a procedure for registering and deleting terminal information between databases managed by the LM is required,
This will increase the signal traffic in the network. Further, it becomes necessary to share the database structure for managing the movement of the same information wireless communication terminal between LMs. Therefore, this model has a large impact on existing systems.

The LM common type model is a model in which a common LM having a common database structure is provided for each access infrastructure. However, since the common LM enables the information wireless communication terminal to be uniquely identified, each access infrastructure needs a function of converting terminal information managed by access uniquely. This model also has a large impact on existing systems.

On the other hand, in the model according to the present invention (referred to as a hybrid model), as shown in FIG. 10C, a common LM having a common database structure is provided on the LM of each access infrastructure. It is a model. In this case, LM of each access infrastructure
Makes it possible to hide the terminal information unique to the access and register the information independent of the access to the common LM. Therefore, the information wireless communication terminal and the access network are less affected, and even when the access is changed, the information in the database managed by the shared LM (access infrastructure information) is less updated than in the LM separated model. Therefore, by using this model, the problems of the LM separated type model and the LM common type model can be solved.

FIG. 11 shows an example of the MM / RM function deployment model. In order to guarantee the continuity of communication of the same information wireless communication terminal, it is necessary to associate the resource state managed by the RM with the identifier of the communication call managed by the MM,
There is a relationship that RM depends on MM. Here, R
M and MM are regarded as a pair of functions and are expressed as MM / RM.

A model generally considered as a function deployment model of the MM / RM is as shown in FIG.
In this model, MM / RM is deployed in each access infrastructure. For convenience, this model is called the MM / RM separated model.

In the MM / RM separation type model, when the access is changed during communication, the resource state (C
A mechanism for notifying ODEC and communication quality) is needed, and communication identifiers that differ between accesses between MMs are
A function to recognize that it is communication of the same terminal,
A function that maps to a resource managed by the RM is required. Therefore, the existing system is affected, and the function of guaranteeing the continuity of communication calls of the same terminal becomes complicated.

On the other hand, the model (MM /
The RM common model) is a model in which a common MM / RM is provided in each access infrastructure, as shown in FIG. 11 (B). When changing the access during communication, the common MM manages the movement state of the communication call, the common RM manages the resource state of each access infrastructure,
By linking information between MM / RM, the function of guaranteeing continuity of communication calls of the same terminal is simplified.

[0057]

According to the present invention, a dual type information wireless communication terminal capable of wireless access to both networks of the third generation mobile communication terminal and the wireless LAN terminal, which are expected to spread rapidly in the future, can be accessed. Even when moving between information communication networks with different technologies (including during communication), the same dual type information wireless communication terminal is not subject to radio access technology restrictions or geographical restrictions, and roaming service (communication Connectivity) and handover services (communication continuity)
It is possible to perform mobile communication that guarantees.

[Brief description of drawings]

FIG. 1 is a system configuration diagram of an embodiment of the present invention.

FIG. 2 is a connection procedure diagram of a method for guaranteeing communication connectivity according to the present embodiment.

FIG. 3 is a connection procedure diagram of a method for guaranteeing communication continuity according to the present embodiment.

FIG. 4 is a block diagram showing an internal configuration of a common position information management device and a position information management device.

FIG. 5: Location information management DB and common location information management DB
It is a figure which shows the structural example.

FIG. 6 is a flowchart of roaming processing according to the present embodiment.

FIG. 7 is a block diagram showing internal configurations of a common resource management device and a common mobility management device.

FIG. 8 is a diagram showing a configuration example of a database included in a common resource management device.

FIG. 9 is a flowchart of handover processing according to the present embodiment.

FIG. 10 is a diagram showing an example of an LM function deployment model.

FIG. 11 is a diagram showing an example of an MM / RM function deployment model.

[Explanation of symbols]

1 Dual type information wireless communication terminal 2,3 Information and communication network 4, 5 Wireless layer terminator 6 Common resource management device 7 Common mobility management device 8, 9, 12, 13, 15, 16 Communication infrastructure equipment 10, 11 Position information management device 14 Common location information management device

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Claims (4)

[Claims] 1. A communication system that guarantees communication connectivity when a dual-type information wireless communication terminal that can use both of them moves between information communication networks that provide a plurality of different wireless access technologies. A common location information management device having a common location information management database that manages location information of the information wireless communication terminals without depending on the wireless access technology used by the plurality of information communication networks; A plurality of location information management devices having a location information management database that manages location information of the information wireless communication terminals according to access technologies, and each location information management device is an information communication network from the information wireless communication terminals. With respect to the movement notification of the above, a method of hiding the information unique to the wireless access technology and requesting the common location information management device to register the location information of the information wireless communication terminal And a means for deleting the requested position information of the information wireless communication terminal from the position information management database in response to a position information deletion request of the information wireless communication terminal from the common position information management device, The common location information management device, in response to a location information registration request of the information wireless communication terminal from the location information management device, an identifier capable of uniquely identifying the information wireless communication terminal in the common location information management database and its position. A communication system comprising: means for registering information and means for transmitting a position information deletion request of the information wireless communication terminal to a position information management device of an information communication network before movement. 2. The communication system according to claim 1, wherein
A common resource management device that manages resources of communication calls in the information wireless communication terminals that are in communication, and a common mobility management device that manages mobility of the information wireless communication terminals that are in communication are provided between the plurality of information communication networks. A communication system characterized by being provided in common. 3. Communication in a communication system that guarantees communication connectivity when a dual type information wireless communication terminal that can use both of them moves between information communication networks that provide a plurality of different wireless access technologies. And a common location information management device having a common location information management database that manages location information of the information wireless communication terminals without depending on a wireless access technology used by the plurality of information communication networks. A plurality of position information management devices having a position information management database for managing the position information of the information wireless communication terminals according to the wireless access technology of each information communication network, and a plurality of position information management devices are arranged in a signaling plane in a communication system, The management device hides information unique to the radio access technology from the information radio communication terminal movement notification of the information communication network. , Requesting the position information registration of the information wireless communication terminal to the common position information management device, and the common position information management device, in response to the position information registration request, sends the information wireless communication terminal to the common position information management database. A uniquely identifiable identifier and its position information are registered, and a request for deleting the position information of the information wireless communication terminal is transmitted to the position information management device of the information communication network before moving, and the position information management is performed. A device deletes the requested position information of the information wireless communication terminal from the position information management database in response to a position information deletion request of the information wireless communication terminal from the common position information management device. Connectivity guarantee method. 4. A communication continuity guarantee method in a communication system according to claim 1, wherein a common resource management device for managing resources of communication calls in the information wireless communication terminal in communication, and the information in communication. A common mobility management device that manages the mobility of wireless communication terminals is provided on a signaling plane in a communication system, and the common mobility management device detects the migration of the information wireless communication terminals between the information communication networks and the common resource. The management device is notified of the movement of the information wireless communication terminal between the information communication networks, and the common resource management device responds to the movement notification by using the resource information used in the information communication network before the movement and the information communication after the movement. The resource information of the network is searched, the resource that can be used by the information wireless communication terminal is allocated, and the allocated resource information is notified to the common mobility management device. , The common mobility management device notifies the information wireless communication terminal that it is movable, transfers a response from the information wireless communication terminal to the common resource management device,
The communication continuity assurance method, wherein the common resource management device releases the resources of the information communication network used by the information wireless communication terminal before moving.