JP3325541B2 - Wireless communication system and wireless communication control method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an asymmetric wireless communication system in which an upstream communication speed and a downstream communication speed are different, and more particularly, to a wireless communication system for performing communication with two different types of networks.

[0002]

2. Description of the Related Art As a next-generation multimedia wireless communication system, a wireless communication system capable of transmitting a large amount of information at high speed has been proposed. Among these, attention has been paid to a vertically asymmetric system in which the upstream transmission speed is low and the downstream transmission speed is high. For example, PHS (Personal Handy-ph
2. Description of the Related Art A wireless communication system for providing an information providing service by adding a high-speed downlink communication path to a one-system network has been proposed.

FIG. 18 is a diagram showing a schematic configuration of a conventional radio communication system of this kind. In the system shown in FIG. 18, the user accesses the information storage server 52 using the wireless terminal 51, and downloads desired information from the server 52 to the wireless terminal 51.

[0004] The server 52 is an MM capable of transmitting information at high speed.
It is connected to an AC (Multimedia Mobile Access Communication) network 53, and the MMAC network 53 has a plurality of MMAC base stations 54.
Is connected. These MMAC base stations 54 can transmit information to the wireless terminal 51 at high speed.

[0005] The MMAC network 53 has a PH
An S network 56 is connected, and a plurality of PHS base stations 57 are connected to the PHS network 56. PHS base station 5
7 can transmit and receive information to and from the wireless terminal 51 in both directions at a low speed. For example, PHS base station 5
7 and the wireless terminal 51 have a transmission speed of 32 kbps,
The information transmission speed from the AC base station 54 to the wireless terminal 51 is 10 Mb
It is about ps.

[0006] In this type of wireless communication system, when the system is first constructed, the MMAC base station 54 is installed in places where there are many users, for example, around railway stations, downtowns, airports, and the like. The service area of the installed MMAC base station 54 is not so large. On the other hand, many PHS base stations 57 are already installed, and the service area thereof is wider than the service area of the MMAC base station 54.

[0007] As communication systems in this type of wireless communication system, there are a dual mode system and a hybrid system. In the dual mode system, the wireless terminal 51 performs bidirectional high-speed communication with the MMAC base station 54 within the MMAC service area, and performs bidirectional low-speed communication with the PHS base station 57 outside the MMAC service area. On the other hand, in the hybrid system, the wireless terminal 51 performs low-speed transmission to the PHS base station 57 within the MMAC service area, and simultaneously transmits the MMAC base station 54 And performs high-speed bidirectional communication with the PHS base station 57 outside the MMAC service area.

In this type of wireless communication system, when a wireless terminal 51 requests transmission of information from a server 52 connected to an MMAC network 53 in a hybrid manner, the wireless terminal 51
An uplink communication path from the to the server 52 is set via the PHS base station 57, the PHS network 56, the relay station 55, and the MMAC network 53. On the other hand, the downlink communication path from the server 52 to the wireless terminal 51 is based on the MMAC network 53 and the MMAC network.
It is set via the base station 54. By setting such communication paths of the uplink and the downlink, the server 52
Can transmit a large amount of information, including image information and audio information, to the wireless terminal 51 in a short time.

A multimedia service using a wireless communication system is considered to mainly receive a large amount of information at the wireless terminal 51, and a new system capable of high-speed transmission is added to an existing wireless communication system such as a PHS. By doing so, most of the multimedia services can be transferred to the wireless terminal 51.
Can be provided.

[0010] In addition, by enabling the provision of the multimedia service using the existing wireless terminal 51, the cost, power consumption, and size of the wireless terminal 51 can be reduced. Furthermore, in the initial stage of the introduction of a new wireless communication system, it is expected that the service area will be localized, but by using the existing wireless communication system together, services can be provided over a wide range, albeit at a low speed. can do.

[0011]

However, regardless of which of the above-described hybrid system and dual mode system is adopted, the wireless terminal 51 has a communication circuit for communicating with the PHS network 56 and a communication circuit for communicating with the MMAC network. It is necessary to supply a power supply voltage to each communication circuit, which causes a problem that power consumption of the wireless terminal increases.

The server 52 connected to the MMAC network 53
When trying to transmit information to the wireless terminal 51, the wireless terminal 51 receiving the transmission request may not be within the service area of the MMAC, and the wireless terminal 51 may not normally receive the information from the server 52. there were.

The present invention has been made in view of the above points, and has as its object to reduce the power consumption of a wireless terminal and to provide a first and a second network without complicating the system configuration. It is an object of the present invention to provide a wireless communication system, a wireless base station, a mobile terminal, and a communication control method capable of performing efficient and stable communication between a wireless terminal and a wireless terminal.

[0014]

In order to solve the above-mentioned problems, the invention according to claim 1 is directed to a first wireless communication system which communicates with a wireless terminal via at least one of a plurality of first wireless base stations. A communication network, and a second wireless communication network having a communication area larger than the first wireless communication network and communicating with the wireless terminal via at least one of the plurality of second wireless base stations. An identifier for converting between a first identifier of the wireless terminal in the first wireless communication network and a second identifier of the wireless terminal in the second wireless communication network. A conversion unit, an information providing unit connected to the first wireless communication network and capable of providing information to the wireless terminal, and a conversion unit based on the first identifier from the information providing unit. If a connection request to said wireless terminal was in, the second of said identifier converting means has converted
Transmitting a connection request to the wireless terminal via the second wireless base station on the second wireless communication network based on a second identifier of the wireless terminal in the network of the first communication Control means, when there is a response to the connection request from the wireless communication terminal indicating that connection is possible via the second wireless base station, And second communication control means for transmitting information from the information providing means to the wireless terminal via the wireless communication base station.

According to the first aspect of the present invention, the connection request for the wireless terminal by the information providing means is transmitted to the wireless terminal via the second wireless communication network. There is no need to set up an uplink communication path. In addition, since information conversion means for converting between the first identifier of the wireless terminal in the first wireless communication network and the second identifier of the wireless terminal in the second wireless communication network is provided, By simply designating the first identifier, a specific wireless terminal can be notified of a connection request.

[0016]

[0017]

According to the second aspect of the present invention, the power supply voltage is supplied to the first communication control circuit in the wireless terminal only when communication is performed with the first wireless communication network. Can be reduced.

According to the third aspect of the present invention, the information addressed to the mobile terminal from the information providing means is stored in the storage means. Therefore, even if the information transmitted by the information providing means cannot be immediately received by the wireless terminal, the information is stored later. Can receive.

According to the fourth aspect of the present invention, since the wireless terminal can specify the location where the information transmitted by the information providing means is stored, the mobile terminal can easily download the information later.

[0021]

According to the fifth aspect of the present invention, it is possible to transmit an information provision request to the wireless terminal via the second wireless communication network by specifying the IP address of the wireless terminal assigned by the DHCP server by the information providing means. it can.

In the invention according to claim 6, when there are a plurality of connection means for transmitting and receiving information bidirectionally between the first and second wireless communication networks, which of the connection means is to be connected is determined by the second communication means. In order to notify the wireless terminal via the wireless communication network, the wireless terminal can communicate with the first wireless communication network via the designated connection means.

[0024]

According to a seventh aspect of the present invention, there is provided a first wireless communication network for communicating with a wireless terminal via at least one of a plurality of first wireless base stations, and a communication wider than the first wireless communication network. A wireless communication control method for a wireless communication system having an area and a second wireless communication network communicating with the wireless terminal via at least one of a plurality of second wireless base stations, wherein First converting between a first identifier of the wireless terminal in the wireless communication network and a second identifier of the wireless terminal in the second wireless communication network; The connection request from the information providing unit connected to the communication network is converted by the identifier conversion unit into a second request of the wireless terminal in the second network.
A second step of transmitting to the wireless terminal via the second wireless base station on the second wireless communication network based on the identifier of the second wireless communication network; If there is a response indicating that connection is possible via the second wireless base station, the information from the information providing means is transmitted via the first wireless base station on the first wireless communication network. Transmitting to the wireless terminal.

[0026]

[0027]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a radio communication system and a communication control method according to the present invention will be specifically described with reference to the drawings.

(First Embodiment) FIG. 1 is a block diagram of a first embodiment of the radio communication system according to the present invention.
The wireless communication system of FIG. 1 includes an MMAC network (first wireless communication network) 1 that provides a mobile communication service to mobile terminals in a geographically narrow range, and a mobile communication system that moves in a geographically wider range than the MMAC network 1. A PHS network (second wireless communication network) 2 for providing mobile communication services to terminals.

Hereinafter, a case where the MMAC network 1 uses mobile IP will be described. Here, the mobile IP is such that even when a mobile terminal moves during communication and a subnet changes, a higher-level protocol is not disconnected, and http://www.ietf.org/rfc/rfc2002 RFC (Req
uest For Comments).

In the mobile IP, an IP address is uniquely assigned to identify each mobile terminal. Assigned i
The P address does not change when each mobile terminal moves.

A mobile terminal (PS: Person:
al Station) 3, at least one or more wireless base stations (AP: Access Point) 4 capable of transmitting information at a high speed. AP4 corresponds to a second communication control unit.

In addition, the MMAC network 1 has a server (SV: Server) 5 that provides various information to the PS 3 and an FA (Foreign) that holds the IP address of the PS 3 that can transmit information.
Agent) 6, an HR (Hybrid Router) 7 for integrating the downlink and uplink to PS3, and a storage device (DS: Data Storage) 8 for temporarily storing information addressed to PS3.
An HA (Home Agent) 9 that holds the correspondence between the IP address of the PS 3 and the IP address of the FA 6 is connected. The HA 9 determines which F is assigned to the PS 3 managed by the HA 9.
It is determined whether information can be transmitted via A6. HA9
Corresponds to identifier conversion means. Note that DS8 is not an essential component.

On the other hand, the PHS network 2 is connected to at least one radio base station (CS: Cell Station) 10 for performing bidirectional communication with the PS 3.

The MMAC network 1 and the PHS network 2 have a HAS (H
ybrid Access Server) 11. HA
S11 corresponds to first communication control means. FIG.
In the figure, two HASs 11 are shown, but the HAS 11
There is no particular limitation on the number of.

FIG. 2 is a diagram showing the internal structure of the PS3.
As shown in FIG. 2, an MMAC communication circuit (first wireless communication circuit) 21 for communicating with the MMAC network 1 is provided inside the PS3.
A PHS communication circuit (second wireless communication circuit, address transmission means) 22 for communicating with the PHS network 2, a communication control unit 23 for managing and controlling the MMAC communication circuit 21 and the PHS communication circuit 22, 1 and a location registration processing unit 24 that controls location registration for the PHS network 2.

The PHS communication circuit 22 transmits and receives data to and from the PHS network 2, and the MMAC communication circuit 21 performs only reception from the MMAC network 1.

When the main power switch of the PS 3 is turned on, the power supply voltage is automatically supplied to the PHS communication circuit 22 to perform communication with the CS 10. On the other hand, the power supply voltage is not normally supplied to the MMAC communication circuit 21 and the MM
The power supply voltage is supplied to the MMAC communication circuit 21 only when it becomes necessary to communicate with the AC network 1. Thereby, the power consumption of the PS3 can be reduced, and the radio frequency can be effectively used.

FIG. 3 is a diagram showing the operation of the first embodiment, and shows the operation when the SV 5 issues a communication request to the PS 3. The vertical axis in FIG. 3 is a time axis. Hereinafter, FIG.
The operation of the first embodiment will be described based on FIG.

First, at time T1, SV5 is set to HA9.
Transmits the information (IP packet) addressed to PS3. Note that the SV5 specifies the IP address of the PS3 instead of transmitting the IP packet addressed to the PS3, and
A communication request may be made to S3.

In any case, when recognizing that a communication request to PS3 has occurred, HA9 is fixedly assigned to PS3 used for transmitting information to PS3 via MMAC network 1. The IP address of the PS3 is converted into a PHS telephone number of the PS3 used for establishing a communication path to the PS3 via the PHS network 2. This conversion may be performed by a device other than the HA9.

Here, the HA 9 may directly notify the PS 3 that the communication request has been made by directly using the telephone number of the PS 3. However, as shown in FIG.
If not directly connected, the HA 9 designates the PHS telephone number of the PS 3 to the appropriate HAS 11 connected to both the MMAC network 1 and the PHS network 2, and
Request that the PS3 be notified of the communication request.

Up to this point, PS3 has been using the MMAC shown in FIG.
No power supply voltage is supplied to the communication circuit 21. PS3 is S
Upon receiving a notification from the V5 via the HAS 11 and the PHS network 2 that a communication request has been made, the power supply voltage is supplied to the MMAC communication circuit 21 to enable reception of radio waves from the AP4.

The AP 4 always informs (broadcasts) its own ID, and at time T2 in FIG.
4 is received, at time T3, the PS
3 is for PIAFS (PHS Internet Access
Forum Standard) Make a connection.

Thereafter, at time T4, PS3 goes to HAS1.
1 is requested to connect to the LCP. LCP is a protocol for establishing a data link and performing user authentication.
Thereafter, at time T5, when there is an LCP connection response from the HAS 11 to the PS3, at time T6, the PS3 becomes H
IPCP (Internet Protocol Control Pro) for AS11
tocol) connection request. IPCP is a protocol that determines the IP address and compression method of the sender and receiver.

Thereafter, at time T7, the HAS 11
When there is an IPCP connection response to S3, PS3 sets PH
The location registration (care of address registration) with the HAS 11 via the S network 2 is started. FIG. 3 shows the PPP (P
An example is shown in which connection to the HAS 11 is performed by an Oint to Point Protocol.

Specifically, first, at time T8, PS3
Accesses the FA 6 and registers the IP address of the PS 3 itself in the FA 6. The FA 6 accesses the HA 9 managing the PS 3, notifies the IP address of the PS 3 and the IP address of the FA 6 itself, and notifies that information to the PS 3 can be transmitted via the FA 6. . In addition,
The PS3 sets FA6 to which information to the PS3 should be transferred to H
It is also possible to notify A9 directly.

When the location registration of PS3 is completed, the PS3
Transmits and receives various control information as needed. For example, at time T9 in FIG. 3, PS3 is CS10, H
It requests AP4 to establish a link channel via AS11 and HR7. In response to this request, the AP
4 responds to PS3 that the link channel has been established (time T10). Thereby, a wireless line is set between PS3 and AP4 (time T11).

After that, AP4 transmits FA6 via HR7.
Notify that the wireless channel has been established (at time T
12). Upon receiving this notification, FA 6 transmits the IP packet to the AP
4 (time T13). The AP 4 that has received the IP packet transmits the IP packet to the PS 3 (time T14).

Through the above procedure, communication between PS3 and SV5 becomes possible. For example, when performing communication in a hybrid system, PS3 is CS10, PHS network 2, H3.
Information is transmitted to SV5 via AS11 and HR7. On the other hand, SV5 does not go through the PHS network, but goes through HA9, FA6, HR7, and AP4,
The information is transmitted to PS3.

As described above, in the first embodiment, when information is transmitted from the SV 5 connected to the MMAC network 1 to the PS 3, an information transmission request to the PS 3 is transmitted to the PS 3 via the PHS network 2. Therefore, the PS3 does not need to supply the power supply voltage to the MMAC communication circuit 21 until the transmission request is received, and the power consumption of the PS3 can be reduced. Also, SV
5 is transmitted from the MMAC network 1 directly to the PS3 at a high speed without passing through the PHS network 2, so that the PS3 can receive a large amount of information in a short time.

Further, since the location registration of the PS 3 in the MMAC network 1 is performed through the PHS network 2, there is no need to set up an uplink communication path between the PS 3 and the AP 4 connected to the MMAC network 1. The system configuration can be simplified.

Further, the HA 9 connected to the MMAC network 1
SV to convert between P address and PHS phone number
5 does not need to know the PHS phone number of PS3, just specify the IP address corresponding to PS3.
An information transmission request can be notified to the PS 3 via the PHS network 2. Therefore, the processing load on the SV5 is reduced.

(Second Embodiment) In the second embodiment, contrary to the first embodiment, the PS3 requests the SV5 to transmit information.

FIG. 4 is a diagram showing the operation of the second embodiment, and shows the operation when the PS3 is connected to the SV5 in a hybrid manner.

First, the PS 3 receives the identifier (ID) of the AP 4 which the AP 4 always reports (time T22). P
S3 may periodically receive the identifier of AP4, but instead periodically receives the broadcast information of CS10,
When the PS3 receives the notification that the CS10 is the service area of the MMAC (time T21), the MM shown in FIG.
A power supply voltage may be supplied to the AC communication circuit 21 to start the operation of receiving the identifier of the AP 4. Thereby, the power consumption of PS3 can be reduced.

When a communication request is issued to the SV 5, the PS 3 sends a PPP (P) to the HAS 11 via the PHS network 2.
After connecting with the oint-to-point protocol, location registration to the MMAC network 1 is started. Specifically, similarly to FIG.
After making a PIAFS connection to S11 (time T23),
The connection between the CP and the IPCP is set (time T24 to T27).

After that, PS3 accesses FA6,
The IP address of PS3 itself is registered in FA6. FA6
Accesses the HA9 that manages the PS3, and
Of the FA 6 and the IP address of the FA 6 itself. Thereby, the HA 9 recognizes that information can be transmitted to the PS 3 via the FA 6. PS3 is the PS
The FA 6 to which information is to be transmitted to the HA 3 may be directly notified to the HA 9.

When the location registration of the PS3 is completed by the above procedure, the PS3 transmits and receives various control information as needed (time T29 to T31), and then enables communication between the PS3 and the SV5. Become.

FIG. 4 shows an example in which communication is performed between PS3 and SV5 in a hybrid manner. In this case, PS3
Is transmitted to SV5 via CS10, PHS network 2, HAS11 and HR7, and information from SV5 is transmitted to PS3 via HA9, FA6, HR7 and AP4 (time T32).

As described above, in the second embodiment, PS3
Request to send information to SV5 from PS
In order to transmit the transmission request from SV3 to the SV5 via the PHS network 2 and to perform location registration in the MMAC network 1, before the location registration, that is, before requesting the SV5 to transmit information, the PS3 It is not necessary to supply the power supply voltage to the MMAC communication circuit 21, and the power consumption of the PS3 can be reduced. Also, SV
5 is transmitted directly from the MMAC network 1 to the PS3, so that the PS3 can receive the information from the SV5 at a high speed.

(Third Embodiment) In the third embodiment, similarly to the first embodiment, a request for transmission of information from the SV 5 to a specific PS 3 is made, and information addressed to the PS 3 is temporarily stored. And the IP address of the SV5 is notified to the PS3 via the PHS network 2, and the PS3
When entering the MMAC service area, the PS3 accesses the SV5 and receives information addressed to the PS3.

FIG. 5 is a diagram showing the operation of the third embodiment, and shows the operation when the SV 5 issues a communication request to the PS 3. First, the SV 5 that has issued a communication request to the PS 3 specifies the IP address of the PS 3 to the HA 9 and transmits an incoming call notification to the PS 3 (time T4).
1). At the same time, the SV 5 temporarily stores information addressed to the PS 3. Instead of storing the information addressed to the PS3 inside the SV5, the information may be stored in another storage device, for example, the DS8 shown in FIG. When the information addressed to the PS3 is stored in a storage device other than the SV5, the identifier such as the IP address of the storage device is transmitted to the HA 9 together with the above-mentioned incoming call notification.

In the following, an example will be described in which information addressed to the PS 3 is stored inside the SV 5 and the IP address of the SV 5 is transmitted to the HA 9 together with the above-mentioned incoming call notification.

When the HA 9 recognizes that a communication request from the SV 5 to the PS 3 has occurred, the HA 9 sends the IP address of the PS 3 used for transmitting information to the PS 3 via the MMAC network 1 via the PHS network 2. It is converted to a PS3 PHS telephone number used to establish a communication path to PS3. This conversion may be performed by a device other than the HA9.

Even if the PS 3 receives the communication request from the SV 5 and is out of the MMAC service area, the PS 3 does not need to immediately access the SV 5. For example, when the notification that the PS 3 is in the service area of the MMAC is received from the CS 10, the power supply voltage is supplied to the MMAC communication circuit 21 in the PS 3 and the AP notified by the AP 4 is notified.
4 receives its own identifier (ID) (time T43).

Then, after performing a predetermined communication control (time T44 to T48), the PS 3 starts the location registration to the HA 9 (time T49).

When the location registration is completed, the PS3 transmits and receives various control information as needed (time T50 to T5).
2) Connect to SV5 that stores information destined for PS3, and PS3 can communicate with SV5. The location registration may be performed after the PS3 has completed transmission and reception of various types of control information.

FIG. 5 shows an example in which communication is performed between PS3 and SV5 in a hybrid manner. In this case, PS3
Are CS10, PHS network 2, HAS11, and HR7
To the SV5 via the
The information is transmitted to the PS 3 via the HA 9, FA 6, HR 7, and AP 4 without passing through the S network 2 (time T53).

As described above, also in the third embodiment, just as in the first embodiment, the PS 3 is set to the MM just before communicating with the SV 5.
PS3 when not performing communication to perform AC location registration
It is not necessary to supply the power supply voltage to the MMAC communication circuit 21 in the
The power consumption of PS3 can be reduced. Also, from SV5 to PS
If the PS3 is out of the MMAC service area when the communication request to the PS3 is issued, the information destined for the PS3 is temporarily stored in the MMAC network 1, so that the PS3 transmits the information when the SV5 information is transmitted. Even if the information cannot be received, it can be reliably received later, and no information is lost.

(Fourth Embodiment) In the third embodiment,
Although the so-called hybrid system in which the PS3 performs only high-speed reception with the MMAC network 1 has been described, the fourth embodiment described below is a so-called dual mode in which the PS3 performs transmission and reception with the MMAC network 1. The communication of the system is performed.

FIG. 6 is a diagram showing the operation in the case where communication is performed between the PS3 and the SV5 by the dual mode method. In this case, the PS3 transmits the identifier (ID) of the AP4 to the AP4 itself.
(Time T63), a control signal is directly exchanged with the AP 4 without passing through the PHS network 2 (time T64 to T64).
66), position registration of PS3 is performed (time T67). When the location registration is completed, communication between PS3 and AP4 becomes possible.

When performing dual mode communication between the PS 3 and the SV 5, the PS 3 transmits information to the SV 5 via the AP 4 and the MMAC network 1.
Transmits information to PS3 via HA9, FA6, and AP4.

As described above, even when the PS3 communicates with the SV5 in the dual mode system, since the position of the PS3 is registered in the MMAC network 1 immediately before the communication, the MMAC communication circuit is used when the communication is not performed. There is no need to supply a power supply voltage to the power supply 21 and power consumption of the PS3 can be reduced. Also, PS3
When transmitting information to the SV5, the information is transmitted to the SV5 at high speed because the information is transmitted via the AP4 without passing through the PHS network 2.

(Fifth Embodiment) In the fifth embodiment, the S
Information from V5 to PS3 is temporarily stored in DS8.

FIG. 7 is a diagram showing the operation of the fifth embodiment. The operation when information is transmitted from the SV5 to the PS3, particularly when the PS3 that has received the incoming call notification is outside the MMAC service area, etc. When the information from the SV5 cannot be received, the storage device (D) temporarily stores the information addressed to the PS3.
S8) Notify PS3 of the IP address via PHS network 2, and after PS3 enters the MMAC service area,
8 shows an operation example in the case of accessing the PS 8 and receiving information addressed to the PS 3.

The SV 5 transmits a communication request for a specific PS 3 to the HA 9 by designating the IP address of the PS 3. When recognizing that a communication request to the PS 3 has occurred, the HA 9 obtains the PHS network 2 from the IP address of the PS 3 used for transmitting information to the PS 3 via the MMAC network 1.
Is converted into a PHS telephone number of the PS3 used to establish a communication path to the PS3 via the PC (time T81).

Even if the PS3 receives the notification that there is a communication request, if the PS3 is out of the MMAC service area, the PS3 does not immediately access the SV5, but stores the DS8 address information for temporarily storing the information addressed to the PS3. HA via the PHS network 2
It transmits to S11 (time T82). That is, this embodiment is characterized in that the PS3 specifies the type of DS8 for temporarily storing information from the SV5 and the storage location in the DS8 (hereinafter, referred to as DS8 address information).

When the SV 5 receives the address information of the DS 8 from the PS 3, the SV 5 transmits the information addressed to the PS 3 to the designated DS.
8, or stored in the designated storage location in DS8.

When the PS3 recognizes that it has entered the MMAC service area based on the report from the CSIO (at time T8).
3) After connecting to the PHS network 2 (time T85 to T8
9) The power supply voltage is supplied to the MMAC communication circuit 21 in the PS 3 to start position registration (time T90).

When the location registration is completed, the PS3 transmits and receives various control signals as necessary (time T91 to T9).
3). This enables communication between PS3 and DS8.

FIG. 7 shows an example in which communication is performed between PS3 and DS8 in a hybrid manner. In this case, PS3
Sends information to DS8 via CS10, PHS network 2, HAS11, MMAC network 1 and HR7, and DS8
9, information is transmitted to PS3 via FA6, HR7 and AP4 (time T94).

As described above, in the fifth embodiment, since the PS3 specifies the address information of the DS8 for temporarily storing the information transmitted from the SV5, the information from the SV5 cannot be immediately received by the PS3. However, when the reception is ready, the reception can be performed without fail, and no information is lost. Further, similarly to the first to fourth embodiments,
Only when a request for the PS3 to communicate with the DS8 occurs, the power supply voltage needs to be supplied to the MMAC communication circuit 21 in the PS3, so that the power consumption of the PS3 can be reduced.

(Sixth Embodiment) In the first to fifth embodiments, examples have been described in which the MMAC network 1 uses mobile IP, but the MMAC network 1 may be used in a circuit-switched manner.

FIG. 8 is a block diagram of a wireless communication system according to a sixth embodiment of the present invention. The MMAC network 1 in FIG.
Communication is performed in a circuit-switching manner using an MMAC identifier composed of a telephone number or the like. Instead of the FA 6 and the HA 9, the MMAC network 1 has an address translator (AT: Address Traslator) 31 for translating between an MMAC identifier and a PHS telephone number, and a location register (LR: Location Register) for managing location information of the PS 3. ) 3
2 are connected.

FIG. 9 is a diagram showing the operation of the sixth embodiment, and shows the operation when a communication request is made from the SV 5 to the PS 3.

The PS 3 receives the information indicating that the service area is the MMAC service area broadcasted by the CS (time T101). After that, the SV 5 specifies the MMAC identifier of the PS 3 (for example, a telephone number in the MMAC network 1), and makes a communication request to the PS 3 to the AT 31 (time T10).
2). When the AT 31 recognizes that the communication request to the PS 3 has occurred, the AT 31 transmits the information to the PS 3 via the PHS network 2 from the MMAC identifier of the PS 3 used for transmitting the information to the PS 3 via the MMAC network 1. Performs conversion to the PHS phone number used to do so.

If the AT 31 can directly specify the telephone number of PS3, the telephone number may be specified to make a communication request to PS3. On the other hand, AT 31
Is not connected to the appropriate HAS 11
To the PHS phone number of the PS3,
Notify S3 that a communication request has been made.

When the PS 3 receives the communication request from the SV 5 and receives the identifier (ID) of the AP 4 broadcasted by the AP 4 (time T 103), the PS 3 disconnects the connection to the PHS network 2. After going (time T104
To T108), various types of control information are transmitted and received as necessary (time T109 to T111). At this time, PS3 also performs location registration to MMAC network 1 (time T112).

When the location registration of PS3 is completed, AP4 notifies AT31 that a wireless channel has been established (time T113), and AT31 sends PS5 to SV5.
3 is notified (at time T11).
Four). This enables communication between PS3 and SV5.

For example, when communication is performed between the PS 3 and the SV 5 in a hybrid system, the PS 3 is connected to the CS 10 and the P
Information is transmitted to the SV 5 via the HS network 2, the HAS 11, and the HR 7. The SV 5 transmits information to the PS 3 via the HR 7 and the AP 4 without passing through the PHS network 2.

As described above, in the sixth embodiment, the MMAC network 1
Can be transmitted to the PS3 via the PHS network 2 even if the
5 can be transmitted directly from the MMAC network 1 to the PS 3 without passing through the PHS network 2. In addition, the first to fifth
In the same manner as in the first embodiment, the MMAC communication circuit 21 in the PS3 is used only when the request for the PS3 to communicate with the SV5 is generated.
, The power consumption of the PS3 can be reduced.

(Seventh Embodiment) The seventh embodiment is a modification of the sixth embodiment, and is provided with a DS8 for temporarily storing information to be sent from the SV5 to the PS3.

FIG. 10 is a block diagram of a wireless communication system according to a seventh embodiment of the present invention. The wireless communication system in FIG. 10 is the same as the wireless communication system in FIG. 8 except that the LR 32 is not provided and the DS8 is provided. In addition,
LR32 may be provided.

FIG. 11 is a diagram showing the operation of the seventh embodiment, and shows the operation when a communication request is made from the SV 5 to the PS 3.

SV5 transmits a communication request to PS3 to AT31.
And information to be transmitted to the PS3
8 is temporarily stored (time T122). AT31
Notifies the PS 3 via the CS 10 that there is a communication request from the SV 5.

Thereafter, when the PS3 receives the identifier (ID) of the AP4 itself from the AP4, the PS3 connects to the PHS network 2 and sets various control information. When the setting is completed, the PS3 establishes a connection between the PS3 and the AP4. Communication becomes possible.

In FIG. 11, the process of registering the location of the PS 3 in the MMAC network 1 is omitted. This is because information can be transmitted from the SV 5 to the PS 3 without performing location registration.

When performing communication in a hybrid system between PS3 and AP4, PS3 transmits information to DS8 via CS10, PHS network 2, HAS11 and HR7. Further, the DS8 transmits information to the PS3 via the HR7 and the AP4.

As described above, in the seventh embodiment, the transmission information from the SV5 to the PS3 is temporarily stored in the DS8.
Even if 3 is not in the MMAC service area, information can be transmitted from DS8 to PS3 later. Further, since information is transmitted from the SV 5 to the PS 3 without performing the location registration of the PS 3 with the MMAC network 1, communication control can be simplified. Further, similarly to the first to sixth embodiments, only when the PS3 is in the service area of the MMAC, the power supply voltage needs to be supplied to the MMAC communication circuit 21 in the PS3, so that the power consumption of the PS3 can be reduced. .

(Eighth Embodiment) The eighth embodiment is a modification of the seventh embodiment. The type of the DS8 for temporarily storing information addressed from the SV5 to the PS3 and the storage location in the DS8 Is specified by the PS3.

Since the eighth embodiment has the same configuration as the seventh embodiment, a block diagram is omitted.

FIG. 12 is a diagram showing the operation of the eighth embodiment, and shows an operation example in the case where the information from the SV5 cannot be received because the PS3 which has received the incoming call notification is out of the MMAC service area. .

The SV 5 transmits a communication request for a specific PS 3 to the AT 31 by designating the IP address of the PS 3. When the AT 31 recognizes that a communication request to the PS 3 has occurred, the AT 31 uses the PHS from the IP address of the PS 3 used for transmitting information to the PS 3 via the MMAC network 1.
The PS3 is converted to a PHS telephone number used to establish a communication path to the PS3 via the network 2.

Even if the PS 3 receives the notification that there is a communication request, if the PS 3 is out of the MMAC service area, the PS 3 does not immediately access the SV 5 but temporarily stores the information addressed to the PS 3 (DS 8). To the SV5 via the PHS network 2 (time T143). Upon receiving this notification, the SV 5 temporarily stores the information addressed to the PS 3 in the specified DS 8 or the specified storage location in the DS 8.

When the PS 3 recognizes that it has entered the MMAC service area (time T144), it connects to the PHS network 2 (time T145 to T149), and transmits and receives various control signals as necessary. (Time T150 to T152). This enables communication between PS3 and DS8.

As described above, in the eighth embodiment, the type of DS8 for temporarily storing information transmitted from the SV5 and the D
Since the PS3 specifies the storage location in S8,
Even if the PS3 cannot immediately receive the transmission information from the SV5, it can be surely downloaded when the PS3 is ready to receive it.
You don't need to access.

Further, similarly to the first to seventh embodiments, P
Only when S3 is within the service area of MMAC, PS3
Since the power supply voltage only needs to be supplied to the MMAC communication circuit 21 inside, the power consumption of the PS3 can be reduced.

(Ninth Embodiment) A ninth embodiment is an MM
DHCP (Dynamic Host ConfigurationP) connected to AC network 1
(rotocol) server dynamically assigns an IP address such as PS3.

Since the wireless communication system according to the ninth embodiment has the same block configuration as in FIGS. 8 and 10,
The block diagram is omitted. Inside the HAS 11, a DHCP server for assigning an IP address is provided.
Is dynamically assigned by a DHCP server.

FIG. 13 is a diagram showing the operation of the ninth embodiment. A function of a DHCP server may be provided in addition to the HAS 11, and a plurality of HASs 11 are provided and any one of the HASs 11 is provided.
A function of a DHCP server may be provided.

The PS3 receives the communication request from the SV5 (time T162), and receives the identifier of the AP4 itself (I
D) (time T163), the PS3 makes a PIAFS connection to the HAS11 via the CS10 (time T16).
4) An LCP connection request is made (time T165). HAS11
When there is an LCP connection response from PS3 to PS3 (time T166),
Next, PS3 makes a request for assignment of an IP address to HAS11 (time T167).
3 receives an IP address assignment response (time T16
8), PS3 requests AP4 to establish a link channel (time T169). Next, when there is a link channel establishment response from the AP 4 to the PS 3 (time T170), the PS 3 and the A 3
A wireless line is connected to P4 (time T171), and PS3
Performs location registration with the AT 31 (time T172). That is, PS3 registers an IP address with AT31.

The AT 31 has the MMAC identifier of the PS3, the PHS
The correspondence between telephone numbers and IP addresses is held.
The AT 31 also notifies the SV 5 of the IP address of the PS 3 and notifies the SV 5 that the hybrid connection has been completed.
Notify. This enables communication between PS3 and SV5.

For example, in the case of performing communication in a hybrid system, PS3 is CS10, PHS network 2, HAS11,
And transmits information to the SV5 via the HR7. Also,
The SV5 transmits information to the PS3 via the HR7 and the AP4.

As described above, in the ninth embodiment, since the AT 31 converts the IP address and PHS telephone number assigned by the DHCP server, the SV 5 only needs to specify the IP address of the PS 3 and the MMAC identifier of the PS 3. , To the PS 3 via the PHS network 2.

Further, similarly to the first to eighth embodiments, P
Only when S3 is within the service area of MMAC, PS3
Since the power supply voltage only needs to be supplied to the MMAC communication circuit 21 inside, the power consumption of the PS3 can be reduced.

(Tenth Embodiment) The tenth embodiment is a modification of the ninth embodiment, and is different from the SV5 to the PS3.
Is provided with a DS8 for temporarily storing information addressed to.

The wireless communication system according to the tenth embodiment also has a block configuration similar to that shown in FIGS. 8 and 10, and thus a block diagram is omitted.

FIG. 14 is a diagram showing the operation of the tenth embodiment. When the PS3 that has received the incoming call notification cannot receive information from the SV5 due to being out of the MMAC service area, the information addressed to the PS3 is received. Is notified to the PS3 via the PHS of the storage device (DS) 8 that temporarily stores the DS, and after the PS3 enters the MMAC service area, the DS3
8 shows an operation example in the case of accessing the PS 8 and receiving information addressed to the PS 3.

The PS3 sends a communication request from the SV5 to the CS1.
Even if the information is received via “0”, if the own device is not within the service area of the MMAC, the information is not received from the SV5. S
V5 issues an incoming call request to PS3 to AT31 and temporarily stores information for PS3 in DS8 (time T181).

When the PS 3 receives the identifier (ID) of the AP 4 itself from the AP 4, the PS 3 exchanges control information between the CS 10 and the HAS 11 via the PHS network 2 (time T 182 to T 191). And the communication with the DS8 is enabled (time T192).

PS3 designates the IP address assigned to DS8, and sends PS3 to DS8 via HR7.
To send the information. Information from DS8 is transmitted to PS3 via HR7 and AP4.

As described above, in the tenth embodiment, the SV5
Since the DS8 for temporarily storing the information addressed to the PS3 is provided, even if the PS3 cannot immediately receive the information from the SV5, it can receive the information from the DS8 later. Also, as in the first to ninth embodiments, the PS3
Only when is within the service area of MMAC,
Since it is sufficient to supply the power supply voltage to the MMAC communication circuit 21, P
The power consumption of S3 can be reduced.

(Eleventh Embodiment) The eleventh embodiment is a modified example of the tenth embodiment, and is different from the SV5 to the PS.
Type and DS that temporarily store information addressed to
The PS3 designates the storage location in the storage area 8.

The wireless communication system according to the eleventh embodiment also has a block configuration similar to that shown in FIGS. 8 and 10, so that the block diagram is omitted.

FIG. 15 is a diagram showing the operation of the eleventh embodiment, and shows an example of the operation in the case where the information from the SV 5 cannot be received because the PS 3 which has received the incoming call notification is out of the MMAC service area. .

The SV 5 transmits a communication request for a specific PS 3 to the AT 31 by designating the IP address of the PS 3. When the AT 31 recognizes that a communication request to the PS 3 has occurred, the AT 31 uses the PHS from the IP address of the PS 3 used for transmitting information to the PS 3 via the MMAC network 1.
The PS3 is converted to a PHS telephone number used to establish a communication path to the PS3 via the network 2.

Even if the PS 3 receives the notification that there is a communication request, if the PS 3 is out of the MMAC service area, the PS 3 does not immediately access the SV 5 but sets the IP address of the DS 8 for temporarily storing information addressed to the PS 3. Send to SV5. SV5
Accumulates information in DS8 according to the instruction from PS3.

After that, when recognizing that the PS3 has entered the MMAC service area (time T204), the PS3 supplies the power supply voltage to the MMAC communication circuit 21 in the PS3 and connects to the PHS network 2 ( At time T205), transmission and reception of various control signals are performed (time T210 to T212). Thereby, PS3
Communication between the device and the AP 4 becomes possible.

As described above, in the eleventh embodiment, the SV5
Since the PS3 specifies the type of DS8 for temporarily storing the information transmitted from the server and the storage location in the DS8, even if the PS3 cannot immediately receive the information from the SV5, it is ready to receive the information. Download can be performed reliably, and it is not necessary to access the MMAC network 1 many times for downloading. Further, similarly to the first to tenth embodiments, only when the PS3 is within the service area of the MMAC, the power supply voltage needs to be supplied to the MMAC communication circuit 21 in the PS3, so that the power consumption of the PS3 can be reduced. .

(Twelfth Embodiment) Next, the first embodiment will be described.
A detailed configuration of the wireless base station (AP4) usable in any one of the eleventh to eleventh embodiments will be described.

FIG. 16 is a block diagram showing a detailed configuration of the AP 4 connected to the MMAC network 1. As shown, AP4
Is a transmitting / receiving unit 41 for transmitting / receiving information via the MMAC network 1.
And a wireless transmission unit 42 that can transmit information at least to the PS3 at high speed, and a HAS 11 to be accessed by the PS3.
Is notified to the PS3.

FIG. 17 is a flowchart showing the processing operation of AP4 in FIG.
The processing operation of the AP 4 when connecting to the AC network 1 is shown. Hereinafter, based on this flowchart, the AP of FIG.
4 will be described.

First, the HAS 11 to be accessed by the PS 3
To the PS3 via the PHS wireless base station (step S1). Specifically, the AP 4 notifies the PS 3 of the identifier of the HAS 11, for example, the telephone number of the HAS 11.

[0134] The PS3 is the HAS1 notified from the AP4.
After accessing 1, a connection request is made in a hybrid manner. At this time, the PS 3 also notifies the accessible AP 4.

AP4 sends a connection request from PS3 to HA
It is received via S11 and HR7 (step S2). Next, the AP 4 transmits a response to the connection request to the PS 3 (Step S3). At this time, other control signals to be transmitted and received between PS3 and AP4 can be transmitted and received in the same manner.

According to the above procedure, the PS 3 can perform communication in a hybrid manner via the MMAC network 1. Further, when the HAS 11 to be accessed by the PS 3 is changed, the AP 4 transmits an identifier of the new HAS 11 to the PS 3 so that the PS 3 can access an appropriate HAS 11.

When the PS3 accesses the MMAC network 1 via a device other than the HAS 11, the identifier of the device may be notified from the AP 4 to the PS3. For example, AP4
Is connected to the PHS network 2, the identifier of the AP 4 itself (for example, a telephone number) may be notified to the PS 3.

[0138]

As described above in detail, according to the present invention, an information transmission request from an information providing means to a mobile terminal is transmitted by
Since transmission is performed to the mobile terminal via the second wireless communication network, only the downlink communication path needs to be provided between the first wireless communication network and the mobile terminal, and the system configuration can be simplified.

[0139] In addition, since the identifier providing means for converting the identifier of the mobile terminal in the first wireless communication network and the identifier of the mobile terminal in the second wireless communication network is provided, the information providing means is designated by the information providing means. Specific mobile device
An information transmission request can be notified via the second wireless communication network.

Further, according to the present invention, the information provision request from the mobile terminal to the information provision means is notified to the information provision means via the second wireless communication network. Only a downlink communication path needs to be provided between the mobile terminal and the mobile terminal, and the system configuration can be simplified.

Furthermore, the power supply voltage is supplied to the first wireless communication circuit in the mobile terminal only when the mobile terminal needs to communicate with the first wireless communication network, so that the power consumption of the mobile terminal can be reduced. .

[Brief description of the drawings]

FIG. 1 is a block diagram of a first embodiment of a wireless communication system according to the present invention.

FIG. 2 is a diagram showing an internal configuration of a PS.

FIG. 3 is a diagram showing the operation of the first embodiment.

FIG. 4 is a diagram showing the operation of the second embodiment.

FIG. 5 is a diagram showing the operation of the third embodiment.

FIG. 6 is a diagram showing the operation of the fourth embodiment.

FIG. 7 is a view showing the operation of the fifth embodiment.

FIG. 8 is a block diagram of a sixth embodiment of the wireless communication system according to the present invention.

FIG. 9 is a diagram showing the operation of the sixth embodiment.

FIG. 10 is a block diagram of a wireless communication system according to a seventh embodiment of the present invention.

FIG. 11 is a view showing the operation of the seventh embodiment.

FIG. 12 is a diagram showing the operation of the eighth embodiment.

FIG. 13 is a view showing the operation of the ninth embodiment.

FIG. 14 is a view showing the operation of the tenth embodiment.

FIG. 15 is a view showing the operation of the eleventh embodiment.

FIG. 16 is a block diagram showing a detailed configuration of an AP connected to the MMAC network.

FIG. 17 is a flowchart showing the processing operation of the AP in FIG. 16;

FIG. 18 is a diagram showing a schematic configuration of a conventional wireless communication system of this kind.

[Explanation of symbols]

 Reference Signs List 1 MMAC network 2 PHS network 3 Mobile terminal (PS) 4 Radio base station (AP) 5 Server (SV) 6 FA 7 HR 8 Storage device (DS) 9 HA 10 Radio base station (CS) 11 HAS 21 MMAC communication circuit 22 PHS communication circuit 23 Communication control unit 24 Location registration processing unit 31 Address converter (AT) 32 Location register (LR) 41 Transmission / reception unit 42 Wireless transmission unit 43 Access destination notification unit

────────────────────────────────────────────────── ─── Continuing from the front page (72) Inventor Noriyasu Kato 1 Komukai Toshiba-cho, Saisaki-ku, Kawasaki-shi, Kanagawa Prefecture Toshiba R & D Center (72) Inventor Osamu Moriya 1-chome Shibaura, Minato-ku, Tokyo No. 1 In the head office of Toshiba Corporation (56) References JP-A-9-200825 (JP, A) JP-A 8-275243 (JP, A) (58) Fields studied (Int. Cl. ⁷ , (DB name) H04B 7/24-7/26 102 H04Q 7/00-7/38

Claims (7)

(57) [Claims] 1. A first wireless communication network that communicates with a wireless terminal via at least one of a plurality of first wireless base stations; and a communication area larger than the first wireless communication network. And a second wireless communication network that communicates with said wireless terminal via at least one of said second wireless base stations, wherein said wireless terminal in said first wireless communication network A first identifier, identifier conversion means for performing conversion between a second identifier of the wireless terminal in the second wireless communication network, and an identifier conversion means connected to the first wireless communication network; Information providing means capable of providing information through the first identifier; and a request for connection to the wireless terminal based on the first identifier from the information providing means. Means for converting the connection request via the second wireless base station on the second wireless communication network based on the second identifier of the wireless terminal in the second wireless communication network converted by the means. A first communication control unit for transmitting to the wireless terminal; and a response to the connection request that the wireless terminal is connectable via the second wireless base station. A second communication control means for transmitting information from said information providing means to said wireless terminal via said first wireless communication base station on said wireless communication network. . 2. The wireless terminal has first communication means for performing wireless communication with the first wireless base station, and second communication means for performing wireless communication with the second wireless base station. While the main power switch of the wireless terminal is on, the first communication means is always supplied with the power supply voltage to the second communication means, and the first communication means only starts communication with the first wireless base station. The wireless communication system according to claim 1, wherein a power supply voltage is supplied to the means. 3. A storage device connected to the first wireless communication network and capable of temporarily storing transmission information from the information providing device to the wireless terminal, wherein the first wireless base station comprises: Having means for notifying the wireless terminal of identification information unique to a wireless base station, wherein the second communication control means has received a response from the wireless terminal indicating that the wireless terminal has received the identification information. The wireless communication system according to claim 1, wherein the information stored in the storage unit is transferred to the wireless terminal via the first wireless base station later. 4. The information providing means, wherein the wireless terminal has address transmitting means for transmitting address information of the storage means for storing transmission information from the information providing means to the wireless terminal to the information providing means. The wireless communication system according to claim 3, wherein, on the basis of the address information transmitted from the wireless terminal, transmission information addressed to the wireless terminal is transferred to the specific storage unit. 5. An apparatus according to claim 1, further comprising: address assignment means for dynamically assigning an IP address to each wireless terminal as a first identifier of said wireless terminal in said first wireless communication network; The wireless communication system according to claim 1, wherein the IP address of the wireless terminal is converted into the second identifier of the wireless terminal in the second wireless communication network. 6. A plurality of connecting means for transmitting and receiving information bidirectionally between the first wireless communication network and the second wireless communication network; and wherein the wireless terminal is one of the plurality of connecting means. Access destination notifying means for notifying the wireless terminal of the identification information of the connection means to be accessed to the wireless terminal via the second wireless base station when performing communication with the wireless communication network. The wireless communication system according to claim 1, wherein: 7. A first wireless communication network that communicates with a wireless terminal via at least one of a plurality of first wireless base stations; and a communication area having a wider communication area than the first wireless communication network. A wireless communication control method for a wireless communication system comprising: a second wireless communication network that communicates with the wireless terminal via at least one of the second wireless base stations. A first step of converting between a first identifier of the wireless terminal and a second identifier of the wireless terminal in the second wireless communication network in the first step; and connecting to the first wireless communication network. A connection request from the information providing unit based on the second identifier of the wireless terminal in the second network converted by the identifier conversion unit. A second step of transmitting to the wireless terminal via the second wireless base station on the communication network; and connecting to the connection request from the wireless terminal via the second wireless base station. A third step of transmitting information from the information providing unit to the wireless terminal via the first wireless base station on the first wireless communication network when a response to the effect is received; A wireless communication control method, comprising: