JPH10303923A - Business base station device dealing with lan - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a business base station device dealing with LAN capable of simultaneously communicating data between plural mobile terminals and a terminals of a cable LAN without using plural access servers. SOLUTION: The data is bi-directionally multiplexed and transmitted between the plural mobile terminals with a data communication function by radio and a radio transmission part 10. A cable LAN is connected with a cable LAN interface part 20 and the data is bi-directionally transmitted between the cable LAN interface 20 and the cable LAN. A protocol conversion part 21 to bi- directionally convert a packet based on a protocol of data communication by radio between the mobile terminals and the radio transmission part 10 and a packet based on a protocol of the cable LAN is provided between the radio transmission part 10 and the cable LAN interface part 20. Since the data is bi-directionally multiplexed and transmitted between the radio transmission part 10 and the mobile terminals, the data communication is simultaneously (by time-dividing) performed between the plural mobile terminals and the terminal of the cable LAN without using the plural access servers.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a self-supporting LAN-compatible base station apparatus capable of transmitting data bidirectionally between a mobile terminal transmitting data wirelessly and a terminal of a wired LAN.

[0002]

2. Description of the Related Art In recent years, mobile terminals provided with a wireless data communication function have been provided. In particular, mobile terminals using a PHS protocol having advantages such as low price, low power consumption, and high-speed data transmission have attracted attention. ing. By the way, in order to perform data communication with a wired LAN terminal using this type of mobile terminal, an access server connected to the wired LAN is required. The access server is wired L
This is a type of wired LAN terminal having a data communication function with an AN terminal, and has a data communication function with a mobile terminal.

[0003]

However, in the configuration using an access server as described above, while one mobile terminal is performing data transmission with the access server, communication with the access server is not possible. Since other mobile terminals cannot perform data transmission, a plurality of access servers are required in order to be able to perform data communication with a wired LAN terminal simultaneously using a plurality of mobile terminals. In addition, since the mobile terminal communicates on a different line for each access server, the number of lines increases. As a result, in a small-sized wired LAN used in a home, a small office, or the like, there is a problem in that the cost and the ratio of the access server to the installation space increase when constructing the system.

The present invention has been made in view of the above circumstances, and an object of the present invention is to simultaneously perform data communication between a plurality of mobile terminals and a wired LAN terminal without using a plurality of access servers. LAN to be able to
An object of the present invention is to provide a corresponding self-service base station device.

[0005]

SUMMARY OF THE INVENTION In order to achieve the above object, a first aspect of the present invention is a radio communication system for bidirectionally multiplexing data with a plurality of mobile terminals having a radio data communication function. A transmission unit and a wired LAN
A wired LAN interface unit for bidirectionally transmitting data between the wireless LAN unit and a packet that is interposed between the wireless transmission unit and the wired LAN interface unit and conforms to a protocol for wireless data communication between the mobile terminal and the wireless LAN unit; A protocol converter for bidirectionally converting a packet conforming to a wired LAN protocol. According to this configuration, the wireless transmission unit can physically connect to the mobile terminal, the wired LAN interface unit can physically connect to the wired LAN, and the protocol conversion unit can connect to the mobile terminal. Packets with a wired LAN terminal can be bidirectionally converted and transmitted. That is, data communication can be performed between the mobile terminal and the wired LAN terminal. In addition, since the wireless transmission unit bi-directionally multiplexes data with the mobile terminal, a plurality of mobile terminals can be connected to the wired LA without using a plurality of access servers.
Data communication can be performed simultaneously (time-division) with the N terminals. As a result, the processing up to the third layer of the OSI reference model can be performed between the mobile terminal and the terminal of the wired LAN.

According to a second aspect of the present invention, in the first aspect of the present invention, the wireless communication unit is connected between the wireless transmission unit and a wired line such as a public network or ISDN, and data is transmitted between the wireless transmission unit and the wired line. A PHS is provided between the mobile terminal and the wireless transmission unit.
This is to transmit a packet conforming to the protocol. According to this configuration, the wireless transmission unit can be configured according to the specifications of the ready-made PHS, the design of the wireless transmission unit is facilitated, and the wired line interface unit connected to a wired line such as a public network or ISDN. Is provided, connection to a wired line becomes possible. Also, PHS
Therefore, data communication with a wired LAN terminal can be performed using up to three mobile terminals simultaneously.

A third aspect of the present invention is the invention according to the second aspect, further comprising an identification code storage unit for storing at least one destination identification code, wherein the destination identification code from the mobile terminal is stored in the identification code storage unit in advance. If the stored terminal identification code matches the stored terminal identification code, communication becomes possible between the mobile terminal and the terminal of the wired LAN, and the terminal identification code from the mobile terminal is stored in the identification code storage unit in advance. If they do not match with each other, communication becomes possible between the mobile terminal and the terminal of the wired line designated by the destination identification code. According to this configuration, when the incoming identification code from the mobile terminal matches the identification code storage unit, communication with the wired LAN terminal becomes possible, and when the incoming identification code does not match, communication with the wired line terminal is performed. Since it becomes possible, it becomes possible to specify which of a wired LAN terminal and a wired line terminal (generally a telephone) to communicate with by simply designating the destination identification number from the mobile terminal.

According to a fourth aspect of the present invention, in the first or second aspect of the present invention, the mobile terminal further includes a network information storage unit for storing network information necessary for connection to at least one wired LAN network. Wired LA
When data communication is started with the N terminals, the network information is notified from the network information storage unit to the mobile terminal. According to this configuration, when one mobile terminal is shared with a plurality of wired LANs, network information necessary for connection with the wired LAN is manually operated on the mobile terminal side every time connection with each wired LAN is performed. No need to tell,
The connection procedure with the wired LAN is automated, and the operation of the user of the mobile terminal is simplified.

According to a fifth aspect of the present invention, in the first or the second aspect of the present invention, a packet transmitted between a plurality of mobile terminals bidirectionally multiplex-transmitted to a wireless transmission unit does not pass through a protocol conversion unit. It is something that is exchanged. According to this configuration, since packets transmitted between the mobile terminals are not sent to the wired LAN, it is possible to prevent an unnecessary increase in the traffic of the wired LAN.

[0010]

BEST MODE FOR CARRYING OUT THE INVENTION

(Embodiment 1) FIG. 2 shows a basic system configuration example of the present invention.
Shown in This system includes a wired LAN ₁ having a plurality of terminals L ₁ and L ₂ connected via a transmission line W ₁ , mobile terminals P ₁ and P ₂ for wirelessly transmitting and receiving data, a wired LAN 1 and a mobile terminal P 2 ₁ and P ₂ , a LAN-compatible private base station (hereinafter referred to as “base station”) that enables data communication between mobile terminals P ₁ and P ₂ and terminals L ₁ and L _{2 of} wired LAN ₁ CS). Further, a packet conforming to the PHS protocol is transmitted between the mobile terminals P ₁ and P ₂ and the base station CS.
It also functions as a normal private base station for HS. That is,
The base station CS is a wired line 2 such as a public network or ISDN.
Is connected to the transmission line W ₂ also, and can communicate even among (connected via the modem terminal or telephone) terminal connected to the transmission line W ₂ I ₁ and the mobile terminal P _1, P ₂ .

As shown in FIG. 1, a base station CS includes a wireless transmission section 10 for bidirectionally multiplexing wireless data communication with mobile terminals P ₁ and P _2, and a transmission line W of a wired LAN 1.
Wired LAN interface unit 20 connects _a wired line interface unit 18 for connecting the transmission line W ₂ of cable channel 2, the protocol conversion unit 2 for converting the Putorokoru with the radio transmission unit 10 and the wired LAN interface unit 20
1 and so on.

The radio transmission unit 10 includes an antenna unit 11 for transmitting and receiving radio signals to and from the mobile terminals P ₁ and P _{2. The} radio reception unit 12 converts a high-frequency signal received by the antenna unit 11 into a baseband signal. I do. Further, the baseband signal is input to the demodulation unit 13 and demodulated, and an output corresponding to the logical value of the digital signal is extracted. Since a digital signal corresponding to the communication format of the PHS wireless section is output from the demodulation unit 13, the TDMA decoding unit 14 converts the digital signal into a digital signal of a PHS standard data communication protocol format.

The TDMA code section 15 converts the digital signal converted into the PHS standard data communication protocol format into a digital signal corresponding to the PHS wireless section communication format in the protocol conversion section 21 or the wired line interface section 18. Then, this signal is modulated by the modulation unit 16 to generate a baseband signal, and the baseband signal is input to the radio transmission unit 17 and converted into a high-frequency signal. The high-frequency signal generated in this way is transmitted from the antenna unit 11 as a wireless signal.

Here, since the PHS specification is used, radio signals are time-division multiplexed, and up to three mobile terminals P ₁ and P ₂ can be used simultaneously in a private base station CS. It is possible. By the way, the digital signal of the PHS standard data communication protocol format, that is, the packet conforming to the PHS protocol is bidirectionally converted to the digital signal of the protocol format for the wired line through the wired line interface unit 18. This configuration is similar to that of a normal PHS private base station, and enables data communication and voice communication between mobile terminals P ₁ and P ₂ and terminal I ₁ connected to wired line W _2. It becomes something.

On the other hand, since the protocol differs between the wired LAN 1 and the PHS, the protocol is converted bidirectionally using the protocol converter 21. That is, the protocol conversion unit 21 converts the signal converted into the PHS data communication protocol format in the TDMA decoding unit 14 into the wired LAN 1 protocol format, and converts the signal in the wired LAN protocol format from the wired LAN interface unit 20 into the PHS signal. To the data communication protocol format. Note that the wired L
In the AN interface unit 20, the transmission line W of the wired LAN 1
Transmits and receives signals transmitted as ₁ . put it here,
Protocol conversion unit 21 and wired LAN interface unit 2
A data storage unit 22 is provided between the data storage unit and the data storage unit 22, and the difference in processing speed between the two is absorbed by the data storage unit 22. In other words, the data storage unit 22 temporarily stores the signal converted into the protocol format of the wired LAN 1 by the protocol conversion unit 21 and transfers the signal to the wired LAN interface unit 20. Is temporarily stored and transferred to the protocol converter 21.

The overall control of the base station CS is performed by a control unit 19 comprising a microcomputer. Also, T
Data transfer between the DMA decoding unit 14 and the TDMA code unit 15, the protocol conversion unit 21, and the wired line interface unit 18 is performed through a data highway (bus) 23 inside the base station CS. Mobile terminals P ₁ , P ₂
As shown in FIG. 3, a PHS slave device 31 for transmitting and receiving a radio signal according to the PHS specification, an information terminal device 32 using a microcomputer, and an interface between the PHS slave device 31 and the information terminal device 32 An adapter 33 is provided. The information terminal device 32 is, for example, a personal computer and includes an input device and a display device. The information terminal device 32 transmits data provided by the input device by a wireless signal, and displays data received by the wireless signal on the display device.

By the way, the transmission line W of the wired LAN 1₁Contact
Connected terminal L₁, L_TwoAnd between the base station CS
The first, second and third layers of the OSI reference model such as 4
And a hierarchical architecture corresponding to the upper layer
Data communication is performed (dashed arrows indicate data flow).
). On the other hand, the base station CS and the mobile terminal P₁, P_TwoIn between,
As shown in FIG. 5, a three-layer structure having a first layer, a second layer, and a third layer
Using a PHS layered architecture that supports
Data communication is performed (dashed arrows indicate data flow).
). Also, the base station CS and the mobile terminal P₁, P_TwoBetween
The PHS radio section is time-division multiplexed as shown in FIG.
FIG. 6 (b)
8 slots S like₁~ S₈Each slot
To S₁~ S₈Are the mobile terminals from the base station CS, respectively.
P₁, P_TwoChannel to the mobile terminal P₁~ P_TwoOr
And an uplink channel to the base station CS. Ingredient
Physically slot S₁Is the downlink control channel, slot
S_FiveIs the uplink control channel and slot S_Two~ S
_FourIs the downlink communication channel, slot S₆~ S₈Is up
Used for communication channels. Uplink channel and downlink channel
Frame F is 4 channels.
One of which is used as a control channel,
The remaining three channels are allocated to communication channels.
After all, up to three mobile terminals P in the base station CS₁, P _TwoWhen
Communication becomes possible at the same time.

Thus, as is apparent from the above-described configuration, the base station CS according to the present embodiment includes a PHS data communication protocol format and a wired LAN 1 data communication protocol format as shown in FIGS. The mutual protocol conversion with the data communication protocol format of the wired circuit 2 is possible up to the third layer.
Here, descriptions of the PHS Nth layer, the wired LAN Nth layer, the wired line Nth layer (N is an integer of 1 to 7), etc.
PHS protocol, OS corresponding to layer N of I reference model
A wired LAN protocol corresponding to the I reference model layer N,
It means a wire line protocol corresponding to the Nth layer of the OSI reference model. The upper layer of the wired LAN and the upper layer of the wired line mean the fourth and higher layers through which the protocol is passed without being converted by the base station CS. Also, as is clear from FIGS. 7 and 8, the mobile terminals P ₁ and P ₂ generate a protocol for performing communication with the wired LAN 1 and the wired line 2 in the third and higher layers. As shown in the figure, mobile terminals P ₁ and P ₂
And the terminals L ₁ and L _{2 of the} wired LAN ₁ and the terminal I of the wired line 2
_{Between 1} , the third layer is converted and the fourth and higher layers are passed through as they are.

Next, a communication procedure will be described using the OSI reference model. Now, in the mobile terminal P1, the wired LAN ₁
A request for communication with the terminal L ₁ (layer 3 or above OSI reference model) is generated. As shown in FIG. 9, the base station from the wired LAN upper layer of the mobile terminal P ₁ to the PHS third layer First C
A connection with S is required (1). Next, the mobile terminal P ₁ is the PHS layer 3, the second layer, the first layer, and the PHS of the mobile terminal P _1.
A link establishment request is made to the base station CS through the wireless section (wireless line) and the PHS first, second, and third layers of the base station CS (2). Then, the mobile terminal P ₁ and the base station C
A pre-process for establishing communication is performed between S and S (3), and PHS data communication is established between the two.

[0020] After the PHS data communication in this way has been established, it is sent from the mobile terminal P ₁ wired LAN third layer packets to the terminal L ₁ wired LAN1 is, the second layer of the packet mobile terminal P ₁ After being converted to a PHS second layer packet, the packet is sent to the base station CS in accordance with the PHS data communication protocol. In the base station CS, the protocol conversion unit 21 reconstructs the wired LAN third layer packet from the PHS second layer packet. The reconstructed wired LAN third layer packet has the same protocol as the wired LAN third layer, and is temporarily stored in the data storage unit 22 and then converted to the wired LAN first layer packet in the wired LAN interface unit 20. It is converted and sent to the terminal L1 of the wired LAN ₁ via the wired LAN ₁ (4). afterwards,
It is reconstructed into a wired LAN third layer packet.

Meanwhile, a wired LAN third layer packet sent towards the terminal L ₁ of the wire LAN1 to the mobile terminal P ₁ is wired LAN after being converted to a wired LAN first layer packet terminal L ₁ wired LAN1 To the base station CS. Thereafter, the packet is reconstructed into a wired LAN third-layer packet by the base station CS, and the protocol conversion unit 20
After being converted to the HS second layer packet is sent to the mobile terminal P ₁ conforms to the PHS data communication protocol (5). Thereafter, the mobile terminal P _1, to reconstruct a wired LAN third layer packet from the PHS second layer packet.

According to the above procedure, the mobile terminal P ₁ and the wired L
It is possible to realize a third or more layers of communication of the OSI reference model between the terminal L ₁ of AN1. (Embodiment 2) In this embodiment, by transmitting a destination identification code from the mobile terminals P ₁ and P ₂ , the base station CS connects the mobile terminals P ₁ and P ₂ with the terminals L ₁ and L ₂ of the wired LAN ₁ . The selection of whether to perform data communication between the mobile terminals P ₁ and P ₂ and the terminal I ₁ of the wired line 2 based on the destination identification number.

That is, as shown in FIG.
N1 communication request with the terminal L ₁ of the (layer 3 or above OSI reference model) is assumed to have occurred from the mobile terminal P _1. The procedure at this time is basically as shown in FIG.
Is the same as the procedure shown in FIG.
(5). However, in the present embodiment, the control unit 1 of the base station CS
9 also functions as an identification code storage unit, the control unit 19 are stored in advance wear identification code, during pretreatment (3) for establishing communication, to the base station CS from the mobile terminal P ₁ Communication between the mobile terminal P ₁ and the terminal L _{1 of the} wired LAN ₁ between the mobile terminal P ₁ and the terminal L _{1 of the} wired LAN ₁ when the destination identification code notified by the (4) and (5).

On the other hand, in the preprocessing (3), the mobile terminal P
Even when the wearing identification code from ₁ differs from the wear identification code which is previously stored in the control unit 19, when the terminal I ₁ of the wire line 2 is instructed, wired line third in the base station CS A link is established between the terminal I _{1 of the} wired line via the third layer, the second layer, and the first layer of the terminal I ₁ of the layer, the second layer, the first layer, the wired line 2, and the wired line 2. Establish (6).

Thereafter, between the mobile terminal P ₁ and the terminal I ₁ of the wired line 2, the third layer of the wired line of the mobile terminal P ₁ , the PHS
Layer 2, Layer 1, PHS radio section, base station CS PH
S second layer, first layer, wired line third layer, second layer, first layer,
Wired line 2, wire line third layer of the terminal I ₁ of the wire line 2,
Through the second layer and the first layer, communication of the OSI reference model third layer or higher is realized (7) (8).

Further, the mobile terminal P ₁ has a wired line 2
When a request for voice communication with the terminal I ₁ is issued, the mobile terminal P ₁ is in the PHS layer 3, the layer 2, the layer 1, the PHS radio section, the PHS layer 3 and the layer 2 of the base station CS. , through the first layer performs link establishment request to the base station CS (2), the link for voice communication between the mobile terminal P ₁ and the base station CS is established (3). Also, the base station CS
Is because undergo wear identification code not stored in the control unit 19, the base station CS establishes a link between the terminal I ₁ of the wire line 2 (6). Thus, between the mobile terminal P ₁ and the terminal I ₁ of the wired line 2, the PHS second layer, the first layer, the PHS wireless section of the mobile terminal P _1, the PHS second layer, the first layer of the base station CS , wire line the second layer, the first layer, wire line 2, wire line the second in the terminal I ₁ of the wire line 2
Voice communication is realized through the first layer. Other configurations and operations are the same as those of the first embodiment.

(Embodiment 3) In this embodiment, the base station CS
Is provided with a network information storage unit for storing network information, and the network information storage unit is also used by the control unit 19. Here, the network information is, for example, a subnet mask if the wired LAN 1 is of Ethernet specification, and a network address is also included in the network information.

Now, the control unit 19 of the base station CS has a wired L
It is assumed that three addresses of the third layer of the AN are stored as network information. When the communication request in the mobile terminal P ₁ and the terminal L ₁ of the wire LAN1 (layer 3 or above OSI reference model) is generated, P from the upper layer of the mobile terminal P ₁
A connection request with the base station CS is made to the HS third layer (1),
Mobile terminal P ₁ is PHS third layer, second layer, the first layer, PHS
Wireless section, PHS third layer, second layer in base station CS
A link establishment request to the base station CS is made through the layers and the first layer (2). Further, the mobile terminal P ₁ and the base station CS
After pretreatment for establishing communication is performed between the (3), PHS data communication is established between the mobile terminal P ₁ and the base station CS. This embodiment is also the same as the second embodiment.
Similarly, the base station CS a storable is an incoming identification code, when the called identification code from the mobile terminal P ₁ coincides with wearing identification code which is previously stored in the control unit 19 of the base station CS and Implements the OSI reference model third-layer or higher communication between the mobile terminal P ₁ and the terminal L _{1 of the} wired LAN ₁ (6) (7). These procedures are the same as in the second embodiment.

In the present embodiment, the following processing is performed after the above-described pre-processing (3) and before performing communication between the mobile terminal P ₁ and the terminal L _{1 of the} wired LAN ₁ . That is, after pretreatment (3), the base station CS from the mobile terminal P _1, USPC the PHS communication protocol
When a request for assignment of a wired LAN third layer address is made using H (a user packet channel that can be defined on a communication physical slot) (4), the base station CS is stored in the control unit 19. and assign one of the wired LAN third layer address that is not assigned to another mobile terminal P ₁ to the mobile terminal P ₁ for which the request using the USPCH (5). If there are a plurality of assignable addresses, the addresses to be assigned are selected in the order set in advance. For example, the selection is made in accordance with the arrangement order of the areas where the addresses are stored. Thus,
When an address from the base station CS after the mobile terminal P ₁ makes a request for assigning the address is assigned, then the mobile terminal P ₁ uses the address as the wired LAN third layer address.

When the link between the base station CS and the mobile terminal P ₁ is released, the base station CS requests the mobile terminal P ₁ to release the previously allocated address using the USPCH (8). ), Whereas mobile terminal P ₁ is USPCH
Is used to confirm the release of the address and release the address (9). Other configurations and operations are the same as those of the second embodiment.

(Embodiment 4) The present embodiment is directed to any one of the above-described embodiments, in which a plurality of mobile terminals P ₁ , P
A function for performing communication between the _two is added. Therefore, only the features of the present embodiment will be described below. Now, a wired LAN via the base station CS
It is assumed that there are mobile terminals P ₁ and P ₂ that are communicating with the _first terminal L ₁ on the third or higher layer of the wired LAN. Here, the terminal L ₁ wired LAN1 and mobile terminal P _1, P ₂ is a wired LAN third or more layers of the protocol is assumed all the same. Since the wired LAN third layer addresses of the mobile terminals P ₁ and P ₂ are assigned by the base station CS (preferably, this assignment is automatically performed as in the third embodiment.
May be assigned manually), and the base station CS
Know the wired LAN third layer address in _1, P _2.

When such a setting is made, the mobile terminal P ₁ transmits a packet to the mobile terminal P ₂ (1), and the base station CS transmits the packet to the destination in the third layer of the wired LAN. when the address is determined to be a mobile terminal P _2, without sending a packet to the wired LAN1, PH and the packet at the base station CS
S second layer, the first layer, PHS radio section, PHS second layer of the mobile terminal P _2, and sends to the mobile Mizuhitsuji P ₂ through the first layer (2).

That is, even if a packet is received from the mobile terminal P _1, it is not transmitted to the wired LAN 1.
It does not unnecessarily increase one traffic. Other configurations and operations are the same as those of the first embodiment.

[0034]

According to the first aspect of the present invention, there is provided a wireless transmission unit for bidirectionally multiplexing and transmitting data between a plurality of mobile terminals having a wireless data communication function, and a wired LAN connected to the wired LAN. Wired LA that transmits data bidirectionally between
N interface unit, a packet interposed between the wireless transmission unit and the wired LAN interface unit, and a packet and a wired L
A protocol converter for bidirectionally converting a packet conforming to an AN protocol to a mobile terminal by a wireless transmission unit;
The AN interface unit can physically connect to the wired LAN, and the protocol conversion unit can bidirectionally convert and transmit packets between the mobile terminal and the wired LAN terminal. It is possible to perform data communication between mobile terminals and wired LAN terminals, and since the wireless transmission unit bi-directionally multiplexes data with mobile terminals, use multiple access servers. In addition, there is an advantage that data communication can be performed simultaneously (time-division) between a plurality of mobile terminals and a wired LAN terminal. As a result, there is an advantage that the processing up to the third layer of the OSI reference model can be performed between the mobile terminal and the terminal of the wired LAN.

According to a second aspect of the present invention, data is bidirectionally transmitted between the wireless transmission unit and the wired line, which is connected between the wireless transmission unit and a wired line such as a public network or ISDN. A wireless transmission unit that includes a wired line interface unit that transmits a packet conforming to the PHS protocol between the mobile terminal and the wireless transmission unit can be configured according to a ready-made PHS specification. Has an advantage that connection to a wired line becomes possible by providing a wired line interface unit connected to a wired line such as a public network or ISDN. In addition, since the device conforms to the PHS private base station, data communication with a wired LAN terminal can be performed using up to three mobile terminals simultaneously.

According to a third aspect of the present invention, there is provided an identification code storage unit for storing at least one destination identification code, and a destination identification code from a mobile terminal is stored in the identification code storage unit in advance. When the mobile terminal and the wired LAN terminal can communicate with each other when the identification code matches, the destination identification code from the mobile terminal does not match the destination identification code stored in the identification code storage unit in advance. If the mobile terminal can communicate with the terminal of the wired line specified by the destination identification code, communication with the terminal of the wired LAN is possible if the destination identification code from the mobile terminal matches the identification code storage unit. When the destination identification code does not match, communication becomes possible with the terminal of the wired line. Therefore, only by specifying the destination identification number from the mobile terminal, the terminal of the wired LAN and the terminal of the wired line (generally, There is an advantage that it becomes possible to specify whether to communicate with either of the story machine).

According to a fourth aspect of the present invention, there is provided a network information storage unit for storing network information necessary for connection to at least one wired LAN network,
When starting data communication between a mobile terminal and a wired LAN terminal, the network information storage unit notifies the mobile terminal of network information. When one mobile terminal is shared by a plurality of wired LANs, The mobile terminal does not need to manually instruct network information required for connection with the wired LAN every time connection with each wired LAN is performed, so that the connection procedure with the wired LAN is automated, and the user of the mobile terminal can use it. There is an advantage that the operation is simplified.

According to a fifth aspect of the present invention, packets transmitted between a plurality of mobile terminals bidirectionally multiplex-transmitted to and from a wireless transmission unit are transmitted and received without passing through a protocol conversion unit. Since packets transmitted between the LANs are not sent to the wired LAN, there is an advantage that unnecessary increase of traffic on the wired LAN can be prevented.

[Brief description of the drawings]

FIG. 1 is a block diagram of a LAN-compatible private base station used in Embodiment 1 of the present invention.

FIG. 2 is a schematic configuration diagram showing a system configuration example using the above.

FIG. 3 is a schematic configuration diagram of a mobile terminal used in the above.

FIG. 4 is a conceptual diagram of a layered architecture in a wired LAN terminal according to the first embodiment;

FIG. 5 is a conceptual diagram of a hierarchical architecture of the PHS according to the embodiment.

FIG. 6 is an operation explanatory diagram showing a signal form in a wireless section of the PHS according to the first embodiment.

FIG. 7 is a conceptual diagram of a layered architecture on a wired line side in the above system.

FIG. 8 is a conceptual diagram of a layered architecture on a wired LAN side in the above system.

FIG. 9 is an operation explanatory diagram showing a communication flow in the embodiment.

FIG. 10 is an operation explanatory diagram showing a communication flow according to the second embodiment of the present invention.

FIG. 11 is an operation explanatory diagram showing a communication flow according to a third embodiment of the present invention.

FIG. 12 is an operation explanatory diagram showing a communication flow of a main part of a fourth embodiment of the present invention.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Wired LAN 2 Wired line 10 Wireless transmission unit 11 Antenna unit 12 Wireless reception unit 13 Demodulation unit 14 TDMA decoding unit 15 TDMA code unit 16 Modulation unit 17 Wireless transmission unit 18 Wired line interface unit 19 Control unit 20 Wired LAN interface unit 21 Protocol Conversion unit 22 Data storage unit CS Base station I ₁ terminal L ₁ , L ₂ terminal P ₁ , P ₂ Mobile terminal W ₁ transmission line W ₂ transmission line

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Kazuyasu Yamane 1048 Kadoma Kadoma, Kadoma City, Osaka Inside Matsushita Electric Works, Ltd.

Claims (5)

[Claims] 1. A wireless transmission unit for bidirectionally multiplexing and transmitting data between a plurality of mobile terminals having a wireless data communication function, and a wired LAN connected to a wired LAN for bidirectional data transmission. And a packet complying with a protocol of wireless data communication between a wireless transmitting unit and a wired LAN interface unit and between a mobile end and a wireless LAN protocol. And a protocol conversion unit for bidirectionally converting the information into two. 2. The wireless transmission unit and a public network or ISDN.
A wired line interface unit connected between the wireless transmission unit and the wired line, for transmitting data bidirectionally between the wireless transmission unit and the wired line, and a PHS protocol between the mobile terminal and the wireless transmission unit. 2. The private LAN base station device according to claim 1, wherein the base station device transmits a packet conforming to the standard. 3. An identification code storage unit for storing at least one destination identification code, wherein when a destination identification code from a mobile terminal matches a destination identification code stored in the identification code storage unit in advance. Communication becomes possible between the mobile terminal and the terminal of the wired LAN, and when the destination identification code from the mobile terminal does not match the destination identification code stored in the identification code storage unit in advance, the terminal is designated by the destination identification code. 3. The self-service base station apparatus for LAN according to claim 2, wherein communication becomes possible between a terminal on a wired line and a mobile terminal. And a network information storage unit for storing network information necessary for connection to at least one wired LAN network, wherein when starting data communication between the mobile terminal and the wired LAN terminal, 3. The LA according to claim 1, wherein the network information is notified from the network information storage unit to the mobile terminal.
N compatible private base station equipment. 5. A packet transmitted between a plurality of mobile terminals bidirectionally multiplex-transmitted to and from a wireless transmission unit is transmitted and received without passing through a protocol conversion unit. LAN base station device for private use.