JP2005295332A - COMMUNICATION SYSTEM, USER MANAGEMENT DEVICE, AND MOBILE TERMINAL DEVICE - Google Patents

Abstract

In a mobile IP communication system, a communication system that guarantees QoS according to the performance of a mobile terminal device is obtained.
Mobile terminal devices 30-1 and 30-2 notify the user management device 10 of terminal performance information of the own device, and the user management device 10 is notified from the mobile terminal devices 30-1 and 30-2, respectively. Terminal performance information is set in the packet transfer device 20 as a routing setting, and the packet transfer device 20 is based on the routing settings set by the user management device 10 and the mobile terminal devices 30-1 and 30 -2 Forward the packet addressed to -2.
[Selection] Figure 1

Description

  The present invention relates to a communication system using mobile IP (Internet Protocol), and more particularly to a communication system using mobile IPv6, a user management apparatus, and a mobile terminal apparatus.

  Mobile IP developed for a mobile unit (mobile) manages the movement of a mobile terminal device at the IP layer, and even if the subnet prefix to which the mobile terminal device moves and connects between connection points is changed. This is a technique capable of continuing communication without changing a home address (HoA) that is an IP address assigned to a mobile terminal device on a link. With the change from IPv4 (Internet Protocol version 4) to IPv6 (Internet Protocol version 6), standardization of mobile IPv6 is also being discussed in mobile IP. Internet Draft (draft-ietf-mobileip-ipv6-24.txt) Has been proposed.

  In Internet Draft (first prior art), when a mobile terminal device (MN: Mobile Node) moves to an external network (FN) other than the home link, the mobile terminal device uses the network prefix of the external network as a network. It is managed by a care-of address (CoA) as an identifier.

  Specifically, when connected to an external network, the mobile terminal apparatus acquires a care-of address that is an IP address in the connected external network, and a Binding Update (BU) message that is association information between the acquired care-of address and the home address. Is transmitted to a home agent (HA) that performs user management within the home link. The home agent stores the association between the home address and the care-of address notified by the BU message. Thereafter, the home agent transmits a packet addressed to the mobile terminal device based on the association between the stored home address and care-of address. Thereby, communication of a mobile terminal device can be continued, without changing the home address allocated to the mobile terminal device.

  Various technologies related to a communication system that continues communication without changing an IP address even when a mobile terminal device moves between a plurality of networks, such as Internet Draft, have been considered.

  For example, in the related art (second related art) described in Patent Document 1, in an environment where a plurality of wireless access systems exist, a mobile terminal device having a communication interface corresponding to the plurality of wireless access systems. A technique related to handover is disclosed. Specifically, the mobile terminal device activates all of the plurality of communication interfaces of its own device, searches for connectable wireless access systems, and selects a connected wireless access system from the searched wireless access systems. I am doing so.

  In addition, in the prior art (third prior art) described in Patent Document 2, when managing the association between the home address and the care-of address managed by the home agent, in addition to the home address and the care-of address, A technique related to high-speed handover by layer 2 is disclosed by managing the MAC address of a mobile terminal device in association with each other.

JP 2003-163679 A JP 2002-344479 A Internet Draft (draft-ietf-mobileip-ipv6-24.txt)

  However, the first to third prior arts continue communication without changing the IP address even if the mobile terminal device moves between multiple networks by the IP layer that performs BestEffort type routing based on the IP address. Therefore, there is a problem that it is difficult to guarantee QoS (Quality Of Service).

  Further, in the first conventional technique, the home address and the care-of address are associated with each mobile terminal device to support the movement of the mobile terminal device (Terminal Mobility). Since the association is managed independently for each mobile terminal device, it is possible to cope with the movement of a session from one mobile terminal device to another mobile terminal device (Device Mobility) and the movement of the network domain itself (Group Mobility). There was a problem that it was difficult. This problem has not been solved, although ubiquitous networks and the like have been studied for Device Mobility and Group Mobility.

  Further, in the second prior art, since all the communication interfaces must always be activated in order to search for connectable radio access systems for performing handover, there is a problem that power consumption increases. . In the case of a mobile terminal device that operates on a battery, the problem is that the battery is consumed quickly, and in the case of a rechargeable mobile terminal device, the battery must be charged frequently. It is annoying to the person.

  The present invention has been made in view of the above, and in a mobile IP communication system, a first object is to obtain a communication system, a user management apparatus, and a mobile terminal apparatus that guarantee QoS according to the performance of the mobile terminal apparatus. And

  The second object is to obtain a communication system, a user management apparatus, and a mobile terminal apparatus corresponding to Device Mobility and Group Mobility in a mobile IP communication system.

  A third object is to provide a communication system, a user management device, and a mobile terminal device that can suppress power consumption related to handover of a mobile terminal device in a mobile IP communication system.

  To achieve the above object, according to the communication system of the present invention, when a plurality of mobile terminal apparatuses move in different radio access systems, a user management apparatus uses a home address and a destination radio for each of the plurality of mobile terminal apparatuses. The care-of addresses acquired by the access system are associated and managed, and the packet transfer device transfers packets addressed to the plurality of mobile terminal devices based on instructions from the user management device. In a mobile IP communication system in which communication is continued without changing an IP address, the plurality of mobile terminal devices notify terminal performance information of the own device to the user management device, and the user management device Each terminal performance information notified from the mobile terminal device is managed and the terminal performance information is routed. Set the packet transfer apparatus as Ingu set, the packet transfer apparatus, and wherein the transfer of packets of the plurality of mobile terminals addressed based on the routing setting set from the user management device.

  According to the present invention, the mobile terminal device notifies the user management device of the terminal performance information of its own device, and the user management device manages the terminal performance information notified from the plurality of mobile terminal devices, and the terminal performance information. Is set in the packet transfer apparatus as a routing setting, and the packet transfer apparatus transfers packets addressed to a plurality of mobile terminal apparatuses based on the routing settings set from the user management apparatus.

  According to the communication system according to the present invention, the mobile terminal apparatus notifies the user management apparatus of the terminal performance information of the own apparatus, and the user management apparatus manages the terminal performance information notified from the plurality of mobile terminal apparatuses. At the same time, the terminal performance information is set in the packet transfer device as a routing setting, and the packet transfer device transfers packets addressed to a plurality of mobile terminal devices based on the routing setting set by the user management device. QoS according to the performance of the terminal device can be guaranteed.

  Hereinafter, embodiments of a communication system, a user management device, and a mobile terminal device according to the present invention will be described in detail with reference to the drawings. Note that the present invention is not limited to the embodiments.

Embodiment 1 FIG.
A first embodiment of the present invention will be described with reference to FIGS. 1 is a schematic diagram showing an example of the configuration of a communication system according to Embodiment 1 of the present invention. The communication system according to Embodiment 1 of the present invention includes a user management device 10, a packet transfer device 20, and a plurality (in this case, two) of mobile terminal devices 30-1 and 30-2. The user management apparatus 10 and the packet transfer apparatus 20 are connected by, for example, a LAN (Local Area Network) cable or wireless communication, and can perform mutual communication by TCP (Transmission Control Protocol). The mobile terminal devices 30-1 and 30-2 have interfaces of a wireless communication area 40 and a wireless LAN 50 defined by 3GPP (3rd Generation Partnership Project), and are connected to the Internet 60 via the wireless communication area 40 or the wireless LAN 50. Mutual communication with the packet transfer apparatus 20 is possible. Note that the wireless communication area 40 and the wireless LAN 50 are different wireless access systems referred to in the claims.

  The user management apparatus 10 has a function of managing terminal performance information of the mobile terminal apparatuses 30-1 and 30-2 in addition to the function of Binding Cache of Mobile IPv6. FIG. 2 is a block diagram showing a configuration of the user management apparatus 10 shown in FIG. The user management apparatus 10 includes a management control unit 11, a PN interface unit 12, and a storage unit 13.

  In the storage unit 13, terminal information of the mobile terminal device 30 managed by the user management device 10 is registered. The terminal information is the association between the home address and care-of address of the mobile terminal devices 30-1 and 30-2 and the terminal performance information of the mobile terminal devices 30-1 and 30-2. The terminal information is registered in association with the mobile terminal devices 30-1 and 30-2. The terminal performance information is, for example, a communication interface included in the mobile terminal devices 30-1 and 30-2, a transmission rate that can be transmitted / received for each communication interface, and a reproducible content type.

  The PN interface unit 12 has an interface function for performing mutual communication with the packet transfer apparatus 20. The management control unit 11 comprehensively controls each component of the user management device 10, and controls the mobile terminal devices 30-1 and 30 with respect to the packet transfer device 20 based on the terminal information stored in the storage unit 13. -2 performs routing settings according to the performance of -2.

  The packet transfer device 20 transfers the packet to the mobile terminal devices 30-1 and 30-2 based on the routing setting from the user management device 10. FIG. 3 is a block diagram showing a configuration of the packet transfer apparatus 20 shown in FIG. The packet transfer apparatus 20 includes a routing setting storage unit 21, a communication control unit 22, a UE interface unit 23, and a UEM interface unit 24.

  The UE interface unit 23 has an interface function for performing mutual communication with the mobile terminal devices 30-1 and 30-2. The UEM interface unit 24 has an interface function for performing mutual communication with the user management apparatus 10.

  The routing setting storage unit 21 stores the routing setting notified from the user management apparatus 10. The communication control unit 22 comprehensively controls each component of the packet transfer apparatus 20 and transfers a packet based on the routing setting stored in the routing setting storage unit 21.

  The mobile terminal devices 30-1 and 30-2 shown in FIG. 1 have the same function. The function of the mobile terminal device will be described with reference to the block diagram showing the configuration of the mobile terminal device 30-1 shown in FIG. The mobile terminal device 30-1 includes wireless interface units 32 and 33 and a control unit 31.

  The wireless interface unit 32 has an interface function for performing communication via the wireless communication area 40 defined by 3GPP shown in FIG. The wireless interface unit 33 has an interface function for performing communication via the wireless LAN 50 shown in FIG. That is, the wireless interface units 32 and 33 are communication interfaces corresponding to different wireless access systems in this communication system (in this case, a wireless access system defined by 3GPP and a wireless access system using a wireless LAN).

  The control unit 31 performs overall control of each component of the mobile terminal device 30-1, and performs communication processing in Mobile IPv6. Further, the control unit 31 has terminal performance information of its own device, adds the terminal performance information to the Binding Update message (BU message), and transmits the BU message with the terminal performance information added thereto to the user management device 10. To do.

  Next, the operation of the communication system according to the first embodiment of the present invention will be described. It is assumed that the mobile terminal device 30-1 has moved to the wireless communication area 40 that is an external network other than the home link. The mobile terminal device 30-1 transmits a BU message that notifies the association between the care-of address and the home address in the wireless communication area 40 and the terminal performance information of the own device to the user management device 10. Specifically, the control unit 31 acquires a care-of address of the wireless communication area 40. The control unit 31 generates a BU message including the correspondence between the acquired address and the home address and the terminal performance information of the own device. The control unit 31 transmits the generated BU message to the user management apparatus 10 via the wireless interface unit 32.

  When receiving the BU message transmitted from the mobile terminal device 30-1, the communication control unit 22 of the packet transfer device 20 transmits the BU message received via the UEM interface unit 24 to the user management device 10.

  When the management control unit 11 of the user management device 10 receives the BU message via the PN interface unit 12, the management control unit 11 stores the association between the care-of address and the home address and the terminal performance information in association with the mobile terminal device 30-1. Store in the unit 13. The management control unit 11 notifies the packet transfer device 20 of the terminal performance information of the mobile terminal device 30-1. Note that the timing for notifying the packet transfer apparatus 20 of the terminal performance information may be not when the BU message is received but when other signaling is received.

  When the terminal performance information is received, the communication control unit 22 of the packet transfer apparatus 20 stores the received terminal performance information in the routing setting storage unit 21. Thereafter, when a packet addressed to the mobile terminal device 30-1 is received, whether or not to change the transmission rate based on the terminal performance information stored in the routing setting storage unit 21, or whether to transfer the packet depending on the content type Or whether or not to perform data conversion. The communication control unit 22 transfers the packet based on the determination result.

  For example, the communication control unit 22 monitors the transmission rate in reception of a packet addressed to the mobile terminal device 30-1, and if the monitored transmission rate is faster than the transmission rate of the mobile terminal device 30-1, The packet is transmitted according to the transmission rate of the mobile terminal device 30-1 by controlling the transfer.

  Further, the communication control unit 22 identifies the content type of the packet addressed to the mobile terminal device 30-1, and forwards the packet to the mobile terminal device 30 if the content type packet is reproducible by the mobile terminal device 30-1. If the packet is of a content type that cannot be played back (a content type that the mobile terminal device 30-1 does not support playback), the packet is discarded or the data is converted and transferred. Specifically, it is assumed that the routing setting storage unit 21 stores that the mobile terminal device 30-1 cannot play back video and has a function of playing back only audio. When the communication control unit 22 identifies that the received packet addressed to the mobile terminal device 30-1 is voice and video data, the communication control unit 22 reads the terminal performance information of the mobile terminal device 30-1 in the routing setting storage unit 21. The communication control unit 22 recognizes from the reproducible content type of the read terminal performance information that the mobile terminal device 30-1 cannot reproduce video and can only reproduce audio. The communication control unit 22 converts the video and audio data into audio-only data, and transmits the converted audio-only data packet to the mobile terminal device 30-1.

  In the case of the mobile terminal device 30-2, since the moved external network is not the wireless communication area 40 but the wireless LAN 50, the mobile terminal device 30-1 described above except that communication is performed using the wireless interface unit 33. Therefore, the description thereof is omitted here.

  As described above, in the first embodiment, the terminal performance information of the mobile terminal devices 30-1 and 30-2 managed by the user management device 10 is registered and managed in the storage unit 13, and the terminals registered in the storage unit 13 are registered. Since the performance information is notified to the packet transfer apparatus 20 as a routing setting, QoS corresponding to the performance corresponding to the mobile terminal apparatus can be guaranteed.

Embodiment 2. FIG.
A second embodiment of the present invention will be described with reference to FIGS. The communication system according to the second embodiment of the present invention includes mobile terminal devices 30a-1 and 30a-2 instead of the mobile terminal devices 30-1 and 30-2 of the communication system according to the first embodiment shown in FIG. ing.

  In addition to the functions of the mobile terminal devices 30-1 and 30-2 of the first embodiment, the mobile terminal devices 30a-1 and 30a-2 measure the location information of the own device and manage the measured location information by user management A function of notifying the apparatus 10 is provided. The mobile terminal devices 30a-1 and 30a-2 have the same function. The function of the mobile terminal device will be described with reference to the block diagram showing the configuration of the mobile terminal device 30a-1 shown in FIG. In the mobile terminal device 30a-1, a position measuring unit 34 is added to the mobile terminal device 30-1 of the first embodiment shown in FIG. Components having the same functions as those of the mobile terminal device 30-1 of the mobile 1 shown in FIG. 3 are denoted by the same reference numerals, and redundant description is omitted.

  The position measurement unit 34 is configured by a receiver of a position measurement system such as GPS (Global Positioning System) and measures position information such as latitude and longitude where the device is located.

  In the storage unit 13 of the user management device 10, in addition to the association between the care-of address and the home address and the terminal performance information, as shown in FIG. An access area map indicating the position of the communication area of the area 40 and the wireless LAN 50) is registered.

  Next, as an example, the mobile terminal device 30a-1 is connected to the wireless communication area 40 defined by 3GPP, and the wireless interface unit 32 having the interface function of the wireless communication area 40 is activated to perform communication. The operation of the communication system according to the second embodiment of the present invention will be described. Note that the mobile terminal device 30a-1 activates only the wireless interface unit 32 having the interface of the wireless communication area 40 that performs communication, and the wireless interface unit 33 having the interface of the wireless LAN 50 has stopped. And

  The position measuring unit 34 of the mobile terminal device 30a-1 measures the position of the own device at predetermined time intervals. The control unit 31 notifies the user management device 10 of the position information measured by the position measurement unit 34.

  Based on the location information notified from the mobile terminal device 30a-1 and the access area map stored in the storage unit 13, the management control unit 11 of the user management device 10 is located anywhere on the network managed by the mobile terminal device 30a-1. Recognize if it is located. For example, the management control unit 11 recognizes that the mobile terminal device 30a-1 is located at the position x0 of the wireless communication area 40 in the access area map from the position information notified from the mobile terminal device 30a-1.

  Here, it is assumed that the mobile terminal device 30 a-1 has moved in the wireless communication area 40. The control unit 31 of the mobile terminal device 30a-1 periodically notifies the user management device 10 of the position information measured by the position measurement unit 34. The management control unit 11 of the user management apparatus 10 recognizes that the mobile terminal apparatus 30a-1 has moved to the position x1 of the wireless communication area 40 in the access area map from the position information notified from the mobile terminal apparatus 30a-1. The position x1 where the mobile terminal device 30a-1 is located is also a communication area of the wireless LAN 50. The management control unit 11 recognizes that the position x1 where the mobile terminal device 30a-1 is currently located is the communication area of the wireless communication area 40 and the communication area of the wireless LAN 50, and the wireless LAN 50 from the wireless communication area 40 It is determined that a handover to is possible. The management control unit 11 notifies the mobile terminal device 30a-1 that a handover to the wireless LAN 50 is possible.

  When the control unit 31 of the mobile terminal device 30a-1 receives a notification from the user management device 10 that the handover is possible, the control unit 31 determines whether to perform the handover. When performing a handover, the control unit 31 activates the stopped wireless interface unit 33 to search for an access point of the wireless LAN 50 and connects to the wireless LAN 50. When the connection to the wireless LAN 50 is completed, the control unit 31 stops the wireless interface unit 32 and starts communication on the wireless LAN 50 using the wireless interface unit 33.

  When handover is not performed, the control unit 31 of the mobile terminal device 30a-1 continues communication in the wireless communication area 40 using the currently activated wireless interface unit 32.

  As described above, in the second embodiment, the user management device 10 stores the access area map indicating the location information of the communication area of the network managed by the own device, and is notified from the access area map and the mobile terminal device 30a-1. It is determined whether or not the handover is possible based on the location information, and if the handover is possible, the mobile terminal device 30a-1 is notified that the handover is possible. As a result, the mobile terminal apparatus can always perform the handover without searching for an access point by always activating a plurality of radio interface units 32 and 33 included in the mobile terminal apparatus to perform the handover. The power consumption of the terminal device can be suppressed.

  In the second embodiment, based on the location information and access map of the mobile terminal device 30a-1, the control unit 31 of the user management device 10 determines whether or not the mobile terminal device 30a-1 can be handed over. However, when the communication interface of the mobile terminal device 30a-1 is stored as the terminal performance information, it may be determined whether the handover is possible including the communication interface. Good. That is, when recognizing that the mobile terminal device 30a-1 is located at the position x1 of the access area map shown in FIG. 6, the control unit 31 uses the wireless LAN 50 as a communication interface of the mobile terminal device 30a-1 from the storage unit 13. The mobile terminal apparatus 30a-1 may be notified that the handover is possible only when the wireless LAN 50 interface is provided.

Embodiment 3 FIG.
A third embodiment of the present invention will be described with reference to FIGS. 7 and 8 (FIGS. 8-1 and 8-2). The communication system according to Embodiment 3 of the present invention includes mobile terminal devices 30b-1 and 30b-2 instead of the mobile terminal devices 30-1 and 30-2 of the communication system according to Embodiment 1 shown in FIG. ing.

  In addition to the functions of the mobile terminal device 30a-1 and the mobile terminal device 30a-2 according to the second embodiment, the mobile terminal devices 30b-1 and 30-2 include the mobile terminal device 30b without using a network by short-range wireless communication. -1 and the mobile terminal device 30b-2.

  The mobile terminal devices 30b-1 and 30b-2 have the same function. The function of the mobile terminal device will be described with reference to the block diagram showing the configuration of the mobile terminal device 30b-1 shown in FIG. In the mobile terminal device 30b-1, a short-distance wireless interface unit 35 is added to the mobile terminal device 30a-1 illustrated in FIG. Components having the same functions as those of the mobile terminal device 30a-1 shown in FIG.

  The short-range wireless interface unit 35 is configured by, for example, Bluetooth, and is an interface function for performing mutual communication between mobile terminal devices without using the wireless communication area 40 or the wireless LAN 50.

  For example, the user management device 10 manages the mobile terminal devices located in the wireless communication area 40 as one group and the mobile terminal devices located in the wireless LAN 50 as one group. It is possible to manage a plurality of mobile terminal devices divided into several groups. In the storage unit 13, in addition to the association between the care-of address and the home address, the terminal performance information, and the access area map, group information of the group to which the mobile terminal device belongs is also registered.

  Next, the operation of the communication system according to the third embodiment of the present invention will be described with reference to FIG. The communication system according to the third embodiment of the present invention has a plurality of networks (wireless access systems). In FIG. 8, the wireless communication area 40 in which the mobile terminal devices 30b-1 and 30b-2 are located. Only shown. In addition, it is assumed that the mobile terminal device 30b-1 and the mobile terminal device 30b-2 are registered in advance in the storage unit 13 of the user management device 10 as belonging to the same group.

  As illustrated in FIG. 8A, the mobile terminal device 30b-1 and the mobile terminal device 30b-2 are located in the wireless communication area 40. The control units 31 of the mobile terminal devices 30b-1 and 30b-2 notify the user management device 10 of the location information of the own device measured by the respective position measurement units 34.

  The management control unit 11 of the user management device 10 is based on the location information notified from the mobile terminal devices 30b-1 and 30b-2 and the access area map stored in the storage unit 13, and the mobile terminal devices 30b-1 and 30b. -2 is in which position in the wireless communication area 40 is recognized.

  The mobile terminal device 30b-1 moves while performing a voice call, and moves from the position of the mobile terminal device 30b-1 shown in FIG. 8-1 to the position of the mobile terminal device 30b-1 shown in FIG. To do. The management control unit 11 of the user management device 10 recognizes the positions of the mobile terminal devices 30b-1 and 30b-2 based on the location information and the access area map notified from the mobile terminal devices 30b-1 and 30-2, and 2 Recognizing that the mobile terminal devices 30b-1 and 30b-2 of the bases are approaching.

  If the management control unit 11 of the user management device 10 determines from the group information registered in the storage unit 13 that the mobile terminal device 30b-1 and the mobile terminal device 30b-2 belong to the same group, the mobile terminal The same group member approach notification for notifying that the mobile terminal device of the same group has approached the devices 30b-1 and 30b-2 is notified to the mobile terminal device 30b-1 and the mobile terminal device 30b-2.

  When the same group member approach notification is received, the control unit 31 of the mobile terminal device 30b-1 and the control unit 31 of the mobile terminal device 30b-2 activate the respective short-range wireless interface units 35 to perform communication. The control unit 31 of the mobile terminal device 30b-1 notifies the mobile terminal device 30b-2 of information such as a communication partner and a content type, and moves the session. When the movement of the session is completed, the mobile terminal device 30b-1 control unit 31 transmits a session movement completion notification notifying that the session has been moved to the mobile terminal device 30b-2 to the user management device 10.

  When the session movement notification is received, the management control unit 11 of the user management apparatus 10 has moved the session (in this case, the session has moved from the mobile terminal apparatus 30b-1 to the mobile terminal apparatus 30b-2). Is notified to the packet transfer apparatus 20.

  Upon receiving the notification of session movement, the communication control unit 22 of the packet transfer device 20 transfers the packet transferred to the mobile terminal device 30b-1 to the mobile terminal device 30b-2. When the communication control unit 22 starts the process of transferring the packet transferred to the mobile terminal device 30b-1 to the mobile terminal device 30b-2, the communication terminal unit 30b- registered in the routing setting storage unit 21 Based on the terminal performance information of No. 2, it is determined whether or not to change the transmission rate, whether or not to transfer a packet depending on the content type, whether or not to perform data conversion, and the like. The communication control unit 22 transfers the packet based on the determination result.

  For example, since the mobile terminal device 30b-1 cannot reproduce the video content, the communication control unit 22 of the packet transfer device 20 generates and transfers an audio packet from the audio and video packets to the mobile terminal device 30b-1. Suppose you were. If the mobile terminal device 30b-2 is a mobile terminal device capable of reproducing audio and video content such as a videophone, for example, the routing setting storage unit 21 of the packet transfer device 20 stores the terminal of the mobile terminal device 30b-2. Audio and video are registered as reproducible content as performance information. Therefore, when the packet is transferred to the mobile terminal device 30b-2, the communication control unit 22 transfers the received packet as it is without converting the data. That is, voice and video packets are transferred to the mobile terminal device 30b-2.

  As described above, in the third embodiment, the mobile terminal devices 30b-1 and 30b-2 each notify the user management device 10 of the current location of the own device, and the location information and group information notified by the user management device 10 When the mobile terminal devices 30b-1 and 30b-2 registered as the same group approach based on the above, the same group member approach notification is transmitted to the mobile terminal devices 30b-1 and 30b-2. In addition, Device Mobility can be realized in a mobile IP communication system.

  Further, the communication control unit 22 of the packet transfer device 20 does not transfer the packet addressed to the mobile terminal device 30b-1 to the mobile terminal device 30b-2, but sends it to the mobile terminal device 30b-1 and the mobile terminal device 30b-2. Can also be sent for broadcast distribution.

Embodiment 4 FIG.
A fourth embodiment of the present invention will be described with reference to FIG. In the fourth embodiment, as shown in FIG. 9, a case where a radio access area 70 having a new access point 71 (connection point) is added to the communication system shown in FIG. 1 will be described.

  The access point 71 has a function of notifying the user management apparatus 10 of the current position and the wireless access system, and uses the wireless access area 70 as a communication area.

  As described in the second embodiment, the storage unit 13 of the user management apparatus 10 includes a network communication area managed by the user management apparatus 10 in addition to the association between the care-of address and the home address and the terminal performance information. An access area map indicating the position of is registered.

  Next, an operation for registering the wireless access area 70 in the access area map of the user management apparatus 10 will be described. For example, the access point 71 extends a signaling message such as a BU message of Mobile IPv6 and notifies the user management apparatus 10 of the current location and the radio access system.

  When the management control unit 11 of the user management apparatus 10 receives a notification of the current position and the wireless access system from the access point 71, the management control unit 11 updates the access area map stored in the storage unit 13 based on the notification. Specifically, the management control unit 11 estimates the position of the wireless access area 70 from the position of the access point 71, that is, the communication area. The management control unit 11 adds the estimated position of the wireless access area 70 to the access area map registered in the storage unit 13.

  As described above, in the fourth embodiment, the management control unit 11 of the user management apparatus 10 determines the position of the wireless access area 70 of the access point 71 based on the position information notified from the access point 71 and the wireless access system. Since the access area map is updated by estimation, it is possible to cope with a change in the network configuration managed by the user management apparatus 10 and to dynamically manage the network.

  In the fourth embodiment, the access point 71 notifies the current position. However, the notification of the current position is not limited to the access point 71. For example, a mobile terminal device including a terminal such as a sensor notifies the user management device 10 of the current position of the own device, the wireless access system, and the reception strength of the wireless access system. For example, in the case of Mobile IPv6, the BU message is extended to notify the user management apparatus 10 of the current location and the radio access system. Upon receiving the notification, the control unit 31 of the user management apparatus 10 may update the access area map by estimating the communication area of the wireless access system from the notified location information and the received intensity. This makes it possible to create a more detailed access area map than the communication area estimated from the current position from the access point 71.

Embodiment 5 FIG.
A fifth embodiment of the present invention will be described with reference to FIG. 10 (FIGS. 10-1 and 10-2). FIG. 10-1 is a schematic diagram illustrating an example of a configuration of a communication system according to a fifth embodiment of the present invention. Note that the communication system according to the fifth embodiment of the present invention has a plurality of wireless access systems, but only the wireless communication area 40 is shown in FIG. The communication system according to the fifth embodiment of the present invention is the same as the communication system according to the third embodiment shown in FIG. 8A, and the user management apparatus 10 uses the same public group 80 ( In this case, the mobile terminal devices 30b-1 and 30b-2 located in the train 80) are managed as the same group.

  The mobile terminal devices 30b-1 to 30b-3 have the same functions as the mobile terminal device 30b-1 shown in FIG. In addition, the control unit 31 of the mobile terminal device 30b-1 supports signaling for joining and leaving a member of a group that receives the same content such as a multicast group.

  When the management control unit 11 of the user management device 10 receives a group member participation request or a group member withdrawal request from the mobile terminal devices 30b-1 to 30b-3, it updates the group information registered in the storage unit 13.

  Next, the operation of the communication system according to the fifth embodiment of the present invention will be described with reference to FIG. First, an operation in which the mobile terminal device 30b-3 participates in a group member who receives the same content as the mobile terminal devices 30b-1 and 30b-2 of the train 80 will be described with reference to FIG. In the storage unit 13 of the user management device 10 and the routing setting storage unit 21 of the packet transfer device 20, group information in which the mobile terminal devices 30b-1 and 30b-2 located in the train 80 are in the same group. Are registered, and the mobile terminal devices 30b-1 and 30b-2 receive content such as in-car advertisements.

  As illustrated in FIG. 10A, it is assumed that the owner of the mobile terminal device 30b-3 has entered the train 80 with the mobile terminal device 30b-3. The control unit 31 of the mobile terminal device 30b-3 notifies the user management device 10 of the location information of the own device measured by the location measurement unit 34.

  Based on the access area map registered in the storage unit 13 and the location information of the mobile terminal devices 30b-1 to 30b-3, the management control unit 11 of the user management device 10 causes the mobile terminal device 30b-3 to It recognizes that it approached 30b-1 and 30b-2. The management control unit 11 transmits to the mobile terminal device 30b-3 a terminal approach notification that notifies that the mobile terminal devices 30b-1 and 30b-2 have approached.

  When receiving the terminal approach notification, the control unit 31 of the mobile terminal device 30b-3 activates the short-range wireless interface unit 35, communicates with the mobile terminal device 30b-1 or the mobile terminal device 30b-2, and train 80 Recognize that a public group is formed within When participating in a public group, the control unit 31 transmits a group member participation request to participate in the public group to the user management apparatus 10.

  When the group member participation request is received, the management control unit 11 of the user management apparatus 10 adds the mobile terminal device 30b-3 that has transmitted the group member participation request to the group information registered in the storage unit 13 to obtain the group information. To change. After changing the group information, the management control unit 11 notifies the packet transfer device 20 that the mobile terminal device 30b-3 has been added to the same group as the mobile terminal devices 30b-1 and 30b-2.

  When the notification that the mobile terminal device 30b-3 is added to the same group as the mobile terminal devices 30b-1 and 30b-2 is received, the communication control unit 22 of the packet transfer device 20 is registered in the routing setting storage unit 21. The mobile terminal device 30b-3 is added to the group information. Thereafter, the communication control unit 22 transmits the packet transmitted to the mobile terminal devices 30b-1 and 30b-2 to the mobile terminal device 30b-3. Accordingly, the mobile terminal device 30b-3 can receive the same content as the mobile terminal devices 30b-1 and 30b-2, and the owner of the mobile terminal device 30b-3 can, for example, Can be viewed on the mobile terminal device 30b-3.

  Next, with reference to FIG. 10-2, an operation of the mobile terminal device 30b-3 withdrawing from a member of the group that receives the same content as the mobile terminal devices 30b-1 and 30b-2 of the train 80 will be described.

  When the owner of the mobile terminal device 30b-3 withdraws from the public group of the train 80 that participated by getting off the train 80, the control unit 31 of the mobile terminal device 30b-3 is a group member who withdraws from the public group. A withdrawal request is transmitted to the user management apparatus 10.

  When the group member withdrawal request is received, the management control unit 11 of the user management device 10 deletes the mobile terminal device 30b-3 that has transmitted the group member withdrawal request from the group information registered in the storage unit 13 to obtain the group information. To change. After changing the group information, the management control unit 11 notifies the packet transfer device 20 that the mobile terminal device 30b-3 has been deleted from the group of the mobile terminal devices 30b-1 and 30-2.

  When the mobile terminal device 30b-3 receives a notification that it has been deleted from the same group as the mobile terminal devices 30b-1 and 30b-2, the communication control unit 22 of the packet transfer device 20 is registered in the routing setting storage unit 21. The mobile terminal device 30b-3 is deleted from the group information. Thereafter, the communication control unit 22 does not transmit the packet transmitted to the mobile terminal devices 30b-1 and 30b-2 to the mobile terminal device 30b-3.

  As described above, in the fifth embodiment, when the user management device 10 receives a group member participation request or a group member withdrawal request from the mobile terminal devices 30b-1 to 30b-3, the user management device 10 manages the same group and moves the same group. Since the terminal performance information and group information of the terminal devices 30b-1 to 30b-3 are notified to the packet transfer device 20, the packet transfer device 20 transfers packets based on the terminal performance information and group information. In addition, Group Mobility can be realized in a mobile IP communication system.

  In the fifth embodiment, the management control unit 11 of the user management device 10 determines that the mobile terminal device 30b-3 is the mobile terminal device 30b-1 from the location information and the access area map of the mobile terminal devices 30b-1 to 30b-3. , 30b-2, the terminal approach notification is transmitted to the mobile terminal device 30b-3, and the control unit 31 of the mobile terminal device 30b-3 activates the short-range wireless interface unit 35 to Recognized that a group was formed, and joined the public group by sending a group member participation request. However, participation in the public group can be realized by transmitting a group member participation request, and is not limited to the procedure described in the fifth embodiment.

  For example, in-vehicle advertisements transmitted to the public group are displayed on a display device attached to the wall of the train 80, etc., and a viewer who views the in-vehicle advertisement on the display device is a group member from a mobile terminal device carried by himself / herself. The participation request may be transmitted to the user management apparatus 10.

  The public group is not affected by the position of the mobile terminal devices 30b-1 to 30b-3, that is, whether or not the mobile terminal devices 30b-1 to 30b-3 are approaching. For example, when an in-vehicle advertisement transmitted to a public group is displayed on a display device attached to a wall of the train 80 and the viewer who has viewed the in-vehicle advertisement on the display device gets off the train 80, In order to continuously view the in-vehicle advertisement, a group member participation request may be transmitted from the mobile terminal device 30b-3 to the user management device 10. Thereby, even if the train 80 gets off, the owner of the mobile terminal device 30b-3 can view the advertisement in the vehicle with the mobile terminal device 30b-3.

  Further, as described in the first embodiment, the terminal performance information is registered in the storage unit 13 of the user management apparatus 10, and the terminal performance information is stored in the routing setting storage unit 21 of the packet transfer apparatus 20 by the user management apparatus 10. By registering, it is also possible to distribute contents according to the terminal performance of each of the mobile terminal devices 30b-1 to 30b-3 registered in the group information.

Embodiment 6 FIG.
Embodiment 6 of the present invention will be described with reference to FIG. FIG. 11 is a schematic diagram showing an example of the configuration of the communication system according to the sixth embodiment of the present invention. In the communication system according to the sixth embodiment of the present invention, a wireless LAN 51 is added to the communication system shown in FIG. 1, and the mobile terminal devices 30b-1 and 30b-2 are used instead of the mobile terminal devices 30-1 and 30-2. I have. Components having the same functions as those of the communication system shown in FIG. 1 are denoted by the same reference numerals, and redundant description is omitted. Further, since the mobile terminal device 30b-1 is the same as that shown in FIG. 7, the description thereof is omitted here.

  Next, the operation of the communication system according to the sixth embodiment of the present invention will be described. The mobile terminal device 30b-1 can reproduce only audio, and the mobile terminal device 30b-2 can reproduce audio and video. In FIG. 11, the mobile terminal device 30b-1 stops the wireless interface unit 33 having the communication interfaces of the wireless LANs 50 and 51 (the access points of the wireless LANs 50 and 51 are not searched), and the wireless communication area Assume that only the wireless interface unit 32 having 40 communication interfaces is activated to move while making a voice call. Further, the routing setting storage unit 21 of the packet transfer apparatus 20 has a routing setting set by the user management apparatus 10 (only the voice can be reproduced as the terminal performance information of the mobile terminal apparatus 30b-1, the mobile terminal apparatus The communication control unit 22 of the packet transfer apparatus 20 generates an audio packet from the audio and video packets to reproduce the mobile terminal apparatus. Assume that the message is transmitted to 30b-1.

  When the mobile terminal device 30b-1 moves from the position x2 of the wireless communication area 40 to the position x3 that can communicate with the wireless communication area 40 and the wireless LAN 50, as described in the second embodiment, the mobile terminal device 30b- The control unit 31 notifies the user management device 10 of the location information measured by the one location measurement unit 34, and the management control unit 11 of the user management device 10 determines the wireless LAN 50 based on the notified location information and access map. The mobile terminal device 30b-1 is notified that the handover is possible.

  The control unit 31 of the mobile terminal device 30b-1 decides to perform handover, activates the stopped wireless interface unit 33, and searches for an access point of the wireless LAN 50. The control unit 31 notifies the user management device 10 of the position information of the own device measured by the position measuring unit 34 and the interface used. In the case of mobile IPv6, for example, the BU message is extended to add location information, a used interface, and the like as options.

  Upon receiving the notification from the mobile terminal device 30b-1, the management control unit 11 of the user management device 10 registers the position of the mobile terminal device 30b-1. If the network is Layer 2 Mobility, the management control unit 11 of the user management apparatus 10 has a function of managing the MAC address, and the MAC address, the current location, and the connected wireless access system (In this case, the location registration can be performed in the user management device 10 by notifying the MAC address of the mobile terminal device 30b-1, the location x3, and the wireless LAN 50).

  The management control unit 11 of the user management device 10 performs the location registration of the mobile terminal device 30b-1, and then the mobile terminal device 30b-1 moves from the wireless communication area 40 to the wireless LAN 50, that is, the handover. Is notified to the packet transfer apparatus 20.

  Upon receiving the notification that the handover has been performed, the communication control unit 22 of the packet transfer device 20 switches so that the packet addressed to the mobile terminal device 30 b-1 that has been transferred to the wireless communication area 40 is transferred to the wireless LAN 50.

  Furthermore, it is assumed that the mobile terminal device 30b-1 moves and moves to a position x4 in the communication area of the wireless LAN 50. The management control unit 11 of the user management device 10 recognizes that the mobile terminal device 30b-1 and the mobile terminal device 30b-2 are approaching based on the position information notified from the mobile terminal devices 30b-1 and 30b-2. . Based on the group information stored in the storage unit 13, the management control unit 11 determines whether the mobile terminal device 30b-1 and the mobile terminal device 30b-2 are in the same group.

  When it is determined that the mobile terminal device 30b-1 and the mobile terminal device 30b-2 are in the same group, the management control unit 11 of the user management device 10 sends the same group member approach notification to the mobile terminal devices 30b-1, 30b-. 2 to send.

  When receiving the same group member approach notification, the mobile terminal devices 30b-1 and 30b-2 each activate the short-range wireless interface unit 35 to perform communication. The control unit 31 of the mobile terminal device 30b-1 notifies the mobile terminal device 30b-2 of information such as a communication partner and a content type, and moves the session. When the movement of the session is completed, the mobile terminal device 30b-1 control unit 31 notifies the user management device 10 that the session has been moved to the mobile terminal device 30b-2.

  Upon receiving the notification of session movement, the management control unit 11 of the user management apparatus 10 notifies the packet transfer apparatus 20 that the session has been moved.

  Upon receiving the notification of session movement, the communication control unit 22 of the packet transfer device 20 transfers the packet transferred to the mobile terminal device 30b-1 to the mobile terminal device 30b-2. When the communication control unit 22 starts the process of transferring the packet transferred to the mobile terminal device 30b-1 to the mobile terminal device 30b-2, the communication terminal unit 30b- registered in the routing setting storage unit 21 Based on the terminal performance information of No. 2, it is determined whether or not to change the transmission rate, whether or not to transfer a packet depending on the content type, whether or not to perform data conversion, and the like. The communication control unit 22 transfers the packet based on the determination result.

  Here, it is registered as terminal performance information that the mobile terminal device 30b-1 can reproduce only audio, and the mobile terminal device 30b-2 can reproduce audio and video. . Further, the packet addressed to the mobile terminal device 30b-1 is a voice and video packet, and the communication control unit 22 of the packet transfer device 20 generates a voice packet from the voice and video packets, and the mobile terminal device. 30b-1. Since the session has moved to the mobile terminal device 30b-2 capable of reproducing audio and video, the communication control unit 22 of the packet transfer device 20 transmits the audio and video packets as they are to the mobile terminal device 30b-2. As a result, the voice call that has been performed in the mobile terminal device 30b-1 is taken over by the mobile terminal device 30b-2, and, for example, communication between audio and video like a videophone is performed.

  On the other hand, when it is determined that the mobile terminal device 30b-1 and the mobile terminal device 30b-2 are not in the same group, the management control unit 11 of the user management device 10 does not perform processing. However, as described in the fifth embodiment, when the mobile terminal device 30b-2 transmits a group member participation request to the user management device 10, the mobile terminal device 30b-2 receives the mobile terminal device 30b-1. Can receive the same packet.

  As described above, in the sixth embodiment, the mobile terminal devices 30b-1 and 30b-2 respectively notify the current position of the time device to the user management device 10, and the location information and group information notified by the user management device 10 When the mobile terminal devices 30b-1 and 30b-2 registered as the same group approach based on the above, the same group member approach notification is transmitted to the mobile terminal devices 30b-1 and 30b-2. The mobile terminal devices 30 b-1 and 30 b-2 communicate with each other via the short-range wireless interface unit 35 to move the session, and then transmit a session move completion notification to the user management device 10. When receiving the session movement completion notification, the user management apparatus 10 notifies the packet transfer apparatus 20 that the session has been moved, and transfers the packet addressed to the mobile terminal apparatus 30b-1 to the mobile terminal apparatus 30b-2. Thereby, a ubiquitous network can be realized by a network based on Mobile IPv6, and the communication function of the mobile terminal apparatus can be improved.

  In the first to sixth embodiments, the user management apparatus 10 and the packet transfer apparatus 20 are connected by a LAN cable or wireless communication, but the user management apparatus 10 and the packet transfer apparatus 20 are connected to the Internet 60. You can connect with. Further, the packet transfer device 20 may be arranged anywhere on the network as long as it is on the packet transfer route of the mobile terminal device.

  In the first to sixth embodiments, the packet transfer device and the mobile terminal device are connected via the Internet 60. However, the packet transfer device 20 has an interface function corresponding to a different wireless access system, and has wireless access. You may make it connect directly to a system.

  In the first to sixth embodiments, the mobile terminal device includes the wireless interface unit corresponding to the wireless access system in the communication system. However, the wireless terminal device corresponds to at least two different wireless access systems included in the communication system. The mobile terminal apparatus in the communication system need not have the same function as long as the interface unit is provided.

  As described above, the communication system according to the present invention is useful for mobile IP, and is particularly suitable when QoS guarantee is required.

It is the schematic which shows an example of a structure of the communication system of Embodiment 1 in this invention. It is a block diagram which shows the structure of the user management apparatus shown in FIG. It is a block diagram which shows the structure of the packet transfer apparatus shown in FIG. It is a block diagram which shows the structure of the mobile terminal apparatus shown in FIG. It is a block diagram which shows the structure of the mobile terminal apparatus applied to the communication system of Embodiment 2 in this invention. It is a figure for demonstrating an access area map. It is a block diagram which shows the structure of the mobile terminal apparatus applied to the communication system of Embodiment 3 in this invention. It is a figure for demonstrating operation | movement of the communication system of Embodiment 3 in this invention. It is a figure for demonstrating operation | movement of the communication system of Embodiment 3 in this invention. It is the schematic which shows an example of a structure of the communication system of Embodiment 4 in this invention. It is a sequence diagram for demonstrating operation | movement of the communication system of Embodiment 4 in this invention. It is a sequence diagram for demonstrating operation | movement of the communication system of Embodiment 4 in this invention. It is the schematic which shows an example of a structure of the communication system of Embodiment 6 in this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 User management apparatus 11 Management control part 12 PN interface part 13 Storage part 20 Packet transfer apparatus 21 Routing setting storage part 22 Communication control part 23 UE interface part 24 UEM interface part 30-1,30-2,30a-1,30a- 2, 30b-1, 30b-2, 30b-3 Mobile terminal device 31 Control unit 32, 33 Wireless interface unit 34 Position measurement unit 35 Short-range wireless interface unit 40 Wireless communication area 50, 51 Wireless LAN
60 Internet 70 Wireless access area 71 Access point 80 Train

Claims (22)

When a plurality of mobile terminal devices move in different wireless access systems, the user management device manages the home address and the care-of address acquired by the destination wireless access system in association with each of the plurality of mobile terminal devices, Mobile IP communication in which a plurality of mobile terminal devices continue communication without changing their IP addresses by transferring a packet addressed to the plurality of mobile terminal devices based on an instruction from the user management device. In the system,
The plurality of mobile terminal devices are:
Notifying the user management device of terminal performance information of its own device,
The user management device includes:
Managing each terminal performance information notified from the plurality of mobile terminal devices, and setting the terminal performance information in the packet transfer device as a routing setting,
The packet transfer device includes:
A communication system, wherein packets addressed to the plurality of mobile terminal apparatuses are transferred based on a routing setting set from the user management apparatus. The terminal performance information is
The mobile terminal device has a transceivable content type or transmission speed,
The packet transfer device includes:
When a content type that can be transmitted / received is set as the routing setting, a packet to be transferred is converted into a packet of the content type that can be transmitted / received, the converted packet is transferred, and a transmission speed is set as the routing setting. 2. The communication system according to claim 1, wherein, in a case where the packet is transmitted, packets addressed to the plurality of mobile terminal apparatuses are transferred at a transmission rate corresponding to the set transmission rate. The plurality of mobile terminal devices are:
A position measurement unit that measures the position of the device itself,
With
Notifying the user management device of the position information measured by the position measurement unit,
The user management device includes:
An access area map showing position information of communication areas of the different radio access systems;
With
Managing where the plurality of mobile terminal devices are located in the different radio access systems based on the respective location information notified from the plurality of mobile terminal devices and the access area map;
The communication system according to claim 1 or 2. The connection point arranged in the different wireless access system has a function of notifying the user management device of its own position,
The user management device includes:
Creating an access point map by inferring a communication area of a wireless access system based on position information notified from the connection point;
The communication system according to claim 3. The plurality of mobile terminal devices are:
Notifying the user management device of the location information measured by the location measurement unit, the connected wireless access system, and the reception strength of the wireless access system,
The user management device includes:
Create the access point map by estimating the communication area of the radio access system based on the location information notified from the plurality of mobile terminal devices, the connected radio access system, and the reception strength of the radio access system To do,
The communication system according to claim 3. The user management device includes:
When determining whether or not the plurality of mobile terminal devices can be handed over based on the respective location information notified from the plurality of mobile terminal devices and the access area map, and determining that the handover is possible Informing the mobile terminal device that handover is possible,
The plurality of mobile terminal devices are:
Upon receiving notification that the handover is possible from the user management device, the communication interface corresponding to the radio access system capable of handover is activated and connected to the connection point, and then the communication interface corresponding to the radio access system before the handover is established. To stop,
The communication system according to any one of claims 3 to 5. The plurality of mobile terminal devices are:
When the same group approach notification is received, communication is performed between mobile terminal devices without going through the different wireless access systems, and the communication partner and content type of the own device are notified to move the session. To the user management device,
The user management device includes:
The plurality of mobile terminal devices are managed in groups, and when the mobile terminal devices in the same group approach based on the location information notified from the plurality of mobile terminal devices, Sending a group approach notification and receiving the session movement completion notification, notifies the packet transfer device of the movement of the session,
The packet transfer device includes:
Upon receiving notification of session movement, sending the packet transferred to the mobile terminal device before the session movement to the mobile terminal device after the session movement,
The communication system according to any one of claims 1 to 6. The plurality of mobile terminal devices are:
Send a group member participation request or group member withdrawal request to the user management device,
The user management device includes:
When the plurality of mobile terminal devices are managed by grouping and the group member participation request is received, the mobile terminal device that has transmitted the group member participation request is added to the group, and the packet transfer device is grouped with the group. When the group withdrawal request is received, the mobile terminal device that has transmitted the group member withdrawal request is deleted from the group, and the packet transfer device is notified of the deletion from the group,
The packet transfer device includes:
Forwarding packets addressed to the plurality of mobile terminal devices based on notification of addition or deletion from the user management device;
The communication system according to any one of claims 1 to 6. When a plurality of mobile terminal devices move between different wireless access systems, the home address and the care-of address acquired by the destination wireless access system are managed in association with each other, and the packet transfer device is configured to perform the routing setting. In a user management device that transfers packets addressed to a plurality of mobile terminal devices,
Correspondence between the home address and care-of address corresponding to the plurality of mobile terminal devices, and a storage unit that stores terminal performance information of the mobile terminal device,
An association between the home address and care-of address stored in the storage unit, and a management control unit that sets terminal performance information of the plurality of mobile terminal devices in the packet transfer device as the routing setting;
A user management apparatus comprising: The terminal performance information is
The user management apparatus according to claim 9, wherein the mobile terminal apparatus has a content type or a transmission rate that can be transmitted and received. The storage unit
Storing an access area map indicating position information of communication areas of the different wireless access systems;
The management control unit
Managing the plurality of mobile terminal devices based on respective location information notified from the plurality of mobile terminal devices and an access area map stored in the storage unit;
The user management device according to claim 9 or 10. The management control unit
12. The user according to claim 11, wherein the access area map is created by estimating a communication area of the different radio access system based on position information notified from a connection point arranged in the different radio access system. Management device. The management control unit
The access by estimating the communication area of the radio access system based on the location information of the mobile terminal device notified from the plurality of mobile terminal devices, the connected radio access system, and the reception strength of the radio access system The user management apparatus according to claim 11, wherein an area map is created. The management control unit
When determining whether or not handover of the plurality of mobile terminal devices is possible based on respective location information notified from the plurality of mobile terminal devices and the access area map, and determining that handover is possible The user management apparatus according to claim 11, wherein the mobile terminal apparatus is notified that a handover is possible. The storage unit
Storing group information obtained by grouping the plurality of mobile terminal devices;
The management control unit
If it is determined whether the mobile terminal device of the same group has approached based on the group information and the position information notified from the plurality of mobile terminal devices, and if it is determined that the mobile terminal device of the same group has approached 15. The same group approach notification is transmitted to the approaching mobile terminal device, and when the session movement completion notification is received from the mobile terminal device, the packet transfer device is notified of the session movement. The user management device according to any one of the above. The storage unit
Storing group information obtained by grouping the plurality of mobile terminal devices;
The management control unit
When a group member participation request is received from the plurality of mobile terminal devices, the mobile terminal device that transmitted the group member participation request is added to group information, and the packet transfer device is notified of addition to the group, When receiving a group withdrawal request from the plurality of mobile terminal devices, the mobile terminal device that has transmitted the group member withdrawal request is deleted from group information, and the packet transfer device is notified of the deletion from the group. 15. The user management apparatus according to claim 9, wherein the user management apparatus is any one of claims 9 to 14. A user management device that manages a home address and a care-of address in association with each other, and a packet transfer device that transfers a packet to a different radio access system without changing the IP address of the packet by a routing setting set by the user management device In a mobile terminal device applied to a communication system comprising:
A wireless interface unit corresponding to the different wireless access system;
A control unit for transmitting terminal performance information of the own device to the user management device;
A mobile terminal device comprising: The terminal performance information is
18. The mobile terminal apparatus according to claim 17, wherein the mobile terminal apparatus has a content type or transmission speed that can be transmitted / received by the own apparatus. A position measurement unit that measures the position of the device itself,
Further comprising
The controller is
Transmitting the position information of the own apparatus measured by the position measuring unit to the user management apparatus;
The mobile terminal apparatus according to claim 17 or 18, characterized in that: The controller is
When only the radio interface unit corresponding to the connected radio access system among the radio interface units is activated and the user management device is notified that the handover is possible, the radio access system capable of the handover Communication corresponding to a radio access system that performs communication after activating a corresponding communication interface unit and connecting to a connection point of the radio access system capable of handover and before connecting to the radio access system capable of handover 20. The mobile terminal apparatus according to claim 17, wherein the interface unit is stopped. The controller is
When the same group approach notification is received from the user management device, communication is performed between the mobile terminal devices without going through the different wireless access systems, and the communication partner and content type of the own device are notified and the session is moved. The mobile terminal apparatus according to claim 17, wherein a session movement completion notification is transmitted to the user management apparatus. The controller is
When joining a group of a plurality of mobile terminal devices in the communication system managed by the user management device, when sending a group member participation request to the user management device and leaving the group to which the device belongs. The mobile terminal apparatus according to claim 17, wherein the mobile terminal apparatus transmits a group member withdrawal request to the user management apparatus.

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