JPH0969834A - Radio communication equipment and radio lan system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To simplify radio communication equipment and a radio local area network(LAN) system and further reduce delay. SOLUTION: Each piece of radio LAN terminal equipment 8 is provided with radio reception parts 24a-24d for receiving packet transmitted data with frequency channels corresponding to respective transmission sources and a data transformation part 26 for reception for identifying data addressed to the equipment itself from headers Ph1 and Ph2 of those packet transmitted data. Therefore, when performing inter-terminal communication, the packet transmitted data transmitted from the other plural pieces of radio LAN terminal equipment 8 are respectively received by different frequency channels so that the data can be distinguishably received without colliding. Besides, the data addressed to the equipment itself can be extracted based on the headers of the packet transmitted data. Thus, since the radio LAN terminal equipment 8 on the reception side can simultaneously get packet transmitted data, speedy processing is enabled and the equipment and the system can be provided in simple configuration.

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to a wireless communication device and a wireless local area network system.

[0002]

2. Description of the Related Art A conventional wireless local area network (wireless LAN) system is disclosed in, for example, Japanese Patent Laid-Open No. 5-102.
There is one disclosed in Japanese Patent No. 969. This is a wireless LA
This is a system for relaying a network-side transmission device connected to N to perform data transmission between terminals. The CSMA / CD method is adopted as the data transmission method. That is,
Packet transmission data is transmitted by competing for a line and monopolizing the line. In addition, in order to improve the throughput of the CSMA / CD system, this conventional technique uses a wireless transmission path set for communication between terminals when data can be directly transmitted between terminals of the same wireless LAN. Are communicating.

[0003]

[Problems to be Solved by the Invention] Presently, multimedia information processing technology, ATM transmission technology,
With the background of broadband communication technology typified by optical fibers and mobile communication technology as personal information access means, there has been a demand for a wireless communication system for wirelessly transmitting multimedia information, that is, a broadband wireless LAN.

A wideband wireless LAN is not limited in transmission speed / delay, such as high-speed and low-delay data transmission such as image transmission, low-speed and low-delay data transmission such as voice transmission, and document data transmission. First, it is a system that transmits various data with one communication system at various communication qualities such as transmission with few errors.

In order to realize a broadband wireless LAN, ATM
It is possible to apply the transmission technology to the wireless LAN,
The following problems have occurred when trying to perform ATM transmission in a conventional wireless LAN. That is, since the access method to the line is the CSMA / CD method, transmission with a small delay required for wide band transmission cannot be performed. In the above-mentioned Japanese Laid-Open Patent Publication No. 5-102969, the direct transmission between the terminals is adopted when the terminals can stably communicate with each other by minimizing the transmission through the line.
Since the access is based on the CSMA / CD method, there is a limit to reducing the delay.

As another method for realizing transmission with less delay, there is a TDMA method. However, when this method is used, it is difficult to control time slots for mutual transmission between a plurality of terminals, and The functional burden and cost burden on the control system became a problem.

The problem of the delay in the communication between the plurality of terminals is that not only the wireless local area network but also the data communication between the plurality of wireless communication devices have the same access to the same wireless communication device. Therefore, there is a similar problem that a delay occurs because one of the wireless communication devices on the transmission side has to wait for the end of the communication that is performed first.

The present invention has been made to solve the above problems, and an object of the present invention is to provide a wireless communication device and a wireless local area network system which are simple and have a small delay.

[0009]

Means for Solving the Problems and Effects of the Invention
The described invention is a wireless communication device capable of simultaneously communicating with a plurality of other wireless communication devices, and transmits transmission data obtained by adding a destination address to data to be transmitted, through a frequency channel assigned to itself. Based on wireless transmission means, wireless reception means for receiving transmission data from each frequency channel assigned corresponding to the transmission source wireless communication device, and address information included in the transmission data received by the wireless reception means. And a data extraction unit that extracts data addressed to itself.

According to a second aspect of the present invention, there is provided a wireless communication device capable of simultaneously communicating with a plurality of other wireless communication devices, wherein transmission data obtained by adding a destination address to data to be transmitted is assigned to itself. Spread spectrum modulation means for spread spectrum modulation with a spread spectrum code, wireless transmission means for transmitting transmission data spread spectrum modulated by the spread spectrum modulation means on a common frequency channel, and transmission data from the common frequency channel. Radio receiving means for receiving, and spread spectrum demodulating means for performing spread spectrum demodulation on the transmission data received by the radio receiving means in synchronization with each spread spectrum modulation code assigned corresponding to the wireless communication device of the transmission source. Included in the transmission data that has been spread spectrum demodulated by the spread spectrum demodulation means. It is a wireless communication apparatus characterized by comprising: a data extracting means for extracting the data addressed to the based on the address information.

According to a third aspect of the present invention, there is provided a wireless communication device capable of simultaneously communicating with a plurality of other wireless communication devices, wherein transmission data is assigned corresponding to a combination of the destination wireless communication device and its own. Wireless transmission means for respectively transmitting on each of the allocated frequency channels, and wireless reception means for respectively receiving transmission data from each of the frequency channels assigned corresponding to the combination of the wireless communication device of the transmission source and itself. A wireless communication device characterized by the above.

According to a fourth aspect of the present invention, there is provided a radio communication device capable of simultaneously communicating with a plurality of other radio communication devices, the spread data being spread spectrum modulated by a spread spectrum code assigned to itself. Means, wireless transmission means for transmitting the transmission data spread-spectrum-modulated by the spread-spectrum modulation means on each frequency channel assigned corresponding to the destination wireless communication device, and assigned corresponding to itself Radio receiving means for receiving transmission data from a designated frequency channel, and transmission data received by the radio receiving means are respectively synchronized with respective spread spectrum modulation codes assigned to the source wireless communication device to spread spectrum. A spread spectrum demodulation means for performing spread spectrum demodulation, and a wireless communication device.

According to a fifth aspect of the present invention, there is provided a wireless communication device capable of simultaneously communicating with a plurality of other wireless communication devices, wherein transmission data is spread spectrum assigned to each of the destination wireless communication devices. Spread spectrum modulation means for performing spread spectrum modulation with a code, wireless transmission means for combining each transmission data subjected to spread spectrum modulation by the spread spectrum modulation means, and transmitting on a frequency channel assigned to itself, and a transmission source Wireless receiving means for receiving transmission data from each frequency channel assigned corresponding to, and each transmission data received by the wireless receiving means, in synchronization with the spread spectrum modulation code assigned corresponding to itself. And a spread spectrum demodulation means for performing spread spectrum demodulation, respectively. .

According to a sixth aspect of the present invention, there is provided a wireless communication device capable of simultaneously communicating with a plurality of other wireless communication devices, wherein transmission data is assigned in correspondence with a combination of the destination wireless communication device and itself. Spread spectrum modulation means for spread spectrum modulating with each spread spectrum code, and wireless transmission means for synthesizing each transmission data spread spectrum modulated by the spread spectrum modulating means and transmitting on a common frequency channel, Radio receiving means for receiving transmission data from a common frequency channel, and transmission data received by the radio receiving means is synchronized with each spread spectrum modulation code assigned corresponding to the combination of the source radio communication device and itself. And a spread spectrum demodulation means for respectively performing spread spectrum demodulation. .

The invention according to claim 7 is connected to a wireless local area network base station, a wireless local area network terminal device, a node switch connected to the wireless local area network base station, and the wireless local area network terminal device. 7. A wireless local area network system comprising: a terminal, wherein the wireless communication device according to claim 1 is used as the wireless local area network terminal device.

The invention according to claim 8 is the same as claims 1 to 6.
8. The wireless local according to claim 7, wherein the wireless communication device according to any one of claims 1 to 3 can communicate with a plurality of other wireless communication devices in the same cell set for repeated use of a frequency channel. It is an area network system.

The invention according to claim 9 is the same as claims 1 to 6.
The wireless communication device according to any one of 1 above, among other cells set for repeated use of the frequency channel, the frequency channel assigned to the cell in the receivable position can also be received. The wireless local area network system according to claim 7, wherein the wireless local area network system can communicate with wireless communication devices in different cells.

Here, the wireless communication device according to the first aspect comprises a wireless transmission means, a wireless reception means, and a data extraction means. The wireless transmission means transmits transmission data in which the address of the transmission destination is added to the data to be transmitted, on the frequency channel assigned to itself. The wireless receiving unit receives the transmission data from each frequency channel assigned corresponding to the wireless communication device that is the transmission source. The data extraction means extracts the data addressed to itself based on the address information included in the transmission data received by the wireless reception means.

On the transmitting side, this wireless communication apparatus transmits transmission data on the frequency channel assigned to itself. On the receiving side, the wireless receiving means receives the transmission data from each frequency channel assigned corresponding to the source wireless communication device. Therefore, even if the wireless communication device on the receiving side is simultaneously accessed by a plurality of other wireless communication devices, the wireless receiving means on the receiving side can receive each of them simultaneously.

Therefore, the plurality of wireless communication devices on the transmission side do not fail the transmission even if the transmissions are duplicated, and do not wait for the communication already performed, and can arbitrarily transmit the transmission data to the reception side. Can be sent. And
Since the wireless communication device on the receiving side can obtain the transmission data at the same time, the processing can be performed early. In addition, such a function can be realized with a simple configuration because basically, a wireless receiving means capable of receiving from a plurality of frequency channels may be provided and communication control for multiple access is not required.

According to a second aspect of the present invention, there is provided a radio communication device comprising spread spectrum modulation means, radio transmission means, radio reception means, spread spectrum demodulation means and data extraction means. The spread spectrum modulation means spread spectrum modulates transmission data obtained by adding a destination address to data to be transmitted, with a spread spectrum code assigned to itself. The wireless transmission means transmits the transmission data that has been spread spectrum modulated by the spread spectrum modulation means on a common frequency channel. The wireless receiving means receives the transmission data from the common frequency channel. The spread spectrum demodulation means spread spectrum demodulates the transmission data received by the wireless reception means in synchronization with each spread spectrum modulation code assigned corresponding to the wireless communication device as the transmission source. The data extraction means extracts the data addressed to itself based on the address information included in the transmission data which has been spread spectrum demodulated by the spread spectrum demodulation means.

On the transmitting side, the present wireless communication device transmits the transmission data by performing spread spectrum modulation with the spread spectrum code assigned to itself. On the receiving side, the spread spectrum demodulation means performs spread spectrum demodulation in synchronization with each spread spectrum modulation code assigned corresponding to the transmission source wireless communication device. Therefore, even if the wireless communication device on the receiving side is simultaneously accessed by a plurality of other wireless communication devices, the spread spectrum demodulation means on the receiving side separates the transmitted transmission data for each wireless communication device as the transmission source. Can be processed. Therefore, the same effect as that of the first aspect can be obtained.

A radio communication apparatus according to a third aspect of the present invention comprises radio transmission means and radio reception means. The wireless transmission means transmits the transmission data on each frequency channel assigned corresponding to the combination of the transmission destination wireless communication device and itself. The wireless receiving means receives the transmission data from each frequency channel assigned corresponding to the combination of the wireless communication device of the transmission source and the wireless communication device. This received data becomes the data addressed to itself.

In this wireless communication device, frequency channels are individually set according to the combination of the transmitting side and the receiving side. This means that each frequency channel assigned corresponding to the combination of the wireless communication device of the transmission destination or the transmission source and itself. Therefore, communication between one wireless communication device and another wireless communication device is
Since the frequency channel limited to the communication of one wireless communication device is used, even if there are simultaneous transmissions from multiple wireless communication devices to one wireless communication device, the contents of the transmission can be distinguished on the receiving side and reception can be performed. All of the data is self-addressed data. Therefore, it becomes unnecessary to make a transmission failure or to wait for a transmission, and the same effect as that of the first aspect can be obtained.

A radio communication device according to a fourth aspect comprises a spread spectrum modulation means, a radio transmission means, a radio reception means, and a spread spectrum demodulation means. The spread spectrum modulation means spread spectrum modulates the transmission data with a spread spectrum code assigned to itself. The wireless transmission means transmits the transmission data subjected to the spread spectrum modulation by the spread spectrum modulation means on each frequency channel assigned corresponding to the destination wireless communication device. The wireless receiving means receives the transmission data from the frequency channel assigned to itself. The spread spectrum demodulation means spread spectrum demodulates the transmission data received by the wireless reception means in synchronization with each spread spectrum modulation code assigned corresponding to the wireless communication device as the transmission source. This spread-spectrum-demodulated received data becomes its own data.

When data is simultaneously transmitted to a wireless communication device on the receiving side from a plurality of other wireless communication devices, it is all addressed to itself, and the transmitted data is spread spectrum assigned to itself on the transmitting side. The code is spread spectrum modulated. Therefore, if the spread-spectrum demodulation means on the receiving side performs spread-spectrum demodulation on the received transmission data in synchronization with each spread-spectrum modulation code assigned corresponding to the wireless communication device of the transmission source, Transmission data can be separated for each wireless communication device. Therefore, even if the plurality of other wireless communication devices simultaneously transmit to one wireless communication device, the contents of the transmission can be distinguished on the receiving side, so that the transmission fails or there is no need to wait for the transmission. The same effect as the case of 1 can be produced.

According to a fifth aspect of the present invention, there is provided a radio communication device comprising spread spectrum modulation means, radio transmission means, radio reception means, and spread spectrum demodulation means. The spread spectrum modulation means spread spectrum modulates the transmission data with each spread spectrum code assigned corresponding to the destination wireless communication device. The wireless transmission means synthesizes the respective transmission data subjected to the spread spectrum modulation by the spread spectrum modulation means, and transmits them by the frequency channel assigned to itself. The wireless receiving means receives the transmission data from each frequency channel assigned corresponding to the transmission source. The spread spectrum demodulation means spread spectrum demodulates each transmission data received by the wireless reception means in synchronization with the spread spectrum modulation code assigned to itself. This spread-spectrum-demodulated received data becomes its own data.

Even if a plurality of wireless communication devices transmit to the wireless communication device on the receiving side at the same time, on the receiving side, the wireless receiving means transmits the transmission data from the frequency channel assigned corresponding to the wireless communication device of the transmission source. Respectively received. For this reason, even if the wireless communication device on the receiving side is simultaneously accessed by a plurality of other wireless communication devices, the wireless receiving means on the receiving side can distinguish the transmission sources and receive them simultaneously. Moreover, the transmission data addressed to itself means that the reception side spread spectrum demodulation means performs spread spectrum demodulation on the received transmission data in synchronization with the spread spectrum modulation code assigned corresponding to itself. , The transmission data transmitted to itself can be separated. Therefore, even if there is simultaneous transmission from a plurality of wireless communication devices to one wireless communication device, the contents of the transmission can be distinguished on the receiving side, so there is no need for transmission failure or waiting for transmission. The same effect as the case can be produced.

A radio communication apparatus according to a sixth aspect comprises a spread spectrum modulation means, a radio transmission means, a radio reception means, and a spread spectrum demodulation means. The spread spectrum modulation unit spread spectrum modulates the transmission data with each spread spectrum code assigned corresponding to the combination of the destination wireless communication device and itself. The wireless transmission means synthesizes the respective transmission data subjected to the spread spectrum modulation by the spread spectrum modulation means, and transmits the combined data on a common frequency channel. The wireless receiving means receives the transmission data from this common frequency channel. The spread spectrum demodulation means spread spectrum demodulates the transmission data received by the wireless reception means in synchronization with each spread spectrum modulation code assigned corresponding to the combination of the transmission source wireless communication device and itself. This spread-spectrum-demodulated received data becomes its own data.

In this wireless communication device, the spread spectrum code is individually set according to the combination of the transmitting side and the receiving side. Each spread spectrum code assigned corresponding to the combination of the wireless communication device of the transmission destination or the transmission source and its own means this. Therefore, communication between one wireless communication device and another wireless communication device is
Since the spread spectrum code limited to the communication of one wireless communication device is used, even if multiple wireless communication devices simultaneously transmit to one wireless communication device, the receiving side transmits to itself by spread spectrum demodulation. Data can be separated. Therefore, it becomes unnecessary to make a transmission failure or to wait for a transmission, and the same effect as that of the first aspect can be obtained.

The wireless communication device includes a wireless local area network base station, a wireless local area network terminal device, a node switch connected to the wireless local area network base station, and a terminal connected to the wireless local area network terminal device. The wireless local area network system can be used as the wireless local area network terminal device.

In this case, if each wireless communication device can communicate with a plurality of other wireless communication devices in the same cell set for repeated use of the frequency channel, the wireless local area network base station The communication between the wireless communication devices in the same cell via the communication is reduced, and in addition to the effect described in claim 1, the throughput is further improved.

In addition, if the frequency channel assigned to the cell in the receivable position among the other cells is also configured to be receivable, it is possible to communicate with the wireless communication device in a different cell. Since the area network base station and the node switch are not burdened, the throughput is further improved.

[0034]

BEST MODE FOR CARRYING OUT THE INVENTION

[First Embodiment] FIG. 1 shows the configuration of a wireless local area network (wireless LAN) system 2 according to an embodiment of the present invention.

The wireless LAN system 2 comprises a node switch 4, a wireless LAN base station 6 and a wireless LAN terminal device 8. The node exchange 4 includes a wireless LAN base station 6 and an unillustrated wired L in an area forming a wireless LAN.
It is connected to an exchange of AN or the like, and further connected to WAN (wide area network). Wireless LAN base station 6
Is a cell 10 that is set up for repeated use of frequencies.
One is installed for each. The wireless LAN base station 6 is
It is connected to each wireless LAN terminal device 8 in the cell 10 by a wireless channel, and is also connected to the node switch 4 by using a wired transmission medium such as an optical fiber 12.

In the wireless LAN terminal device 8 connected to the terminal 14 such as a personal computer or workstation, as shown in FIG. A transmission unit 23 and a data reception unit 27 having a wireless reception unit 24 and a reception data conversion unit 26 are provided.

The transmission data conversion unit 22 and the reception data conversion unit 26 have a conversion function between packet transmission data and ATM data. 432
An optical transmitter 28 and an optical receiver 30 are provided as physical interfaces required for transmission of ATM data defined by the above.

The terminal 14 side is provided with an ATM network interface card (ATM-NIC) 32 for connecting to the wireless LAN terminal device 8 side. AT
The M network interface card 32 is originally
It is for connecting to a wired ATM-LAN, and generates ATM data based on data received from the CPU board 14a side via the internal bus 34, and transmits data transmitted from the ATM data to the internal bus 34 side. ITU-T Recommendation I. An optical transmitter 36 and an optical receiver 38, which are physical interfaces defined by 432 or the like, transmit and receive ATM data to and from the wireless LAN terminal device 8 side via an optical fiber 40.

FIG. 3 shows a block diagram of the wireless LAN terminal device 8. Here, one wireless LAN terminal device 8 will be described, but the other wireless LAN terminal devices 8 have the same configuration except for the frequency channels that can be transmitted and received, and therefore the description of the other wireless LAN terminal device 8 is omitted. To do.

The wireless LAN terminal device 8 includes the data transmission unit 2
3 and a data receiving unit 27. Data transmitter 2
As described above, 3 includes the wireless transmission unit 20 and the transmission data conversion unit 22, and the transmission data conversion unit 22 transmits the ATM data transmitted from the terminal 14 side to the wireless transmission unit 2.
0 is converted into packet transmission data suitable for transmission and is transmitted to the wireless transmission unit 20. The wireless transmission unit 20 wirelessly transmits the packet transmission data transmitted from the transmission data conversion unit 22 on the frequency channel assigned to the wireless LAN terminal device 8.

In the data receiving unit 27, as the wireless receiving unit 24, the number corresponding to the frequency channel assigned to another wireless LAN terminal device 8 existing in the same cell 10 (here, in the same cell 10 If there are four wireless LAN terminal devices 8, the number of other wireless LAN terminal devices 8 will be three).
c, and a wireless reception unit 24d corresponding to the frequency channel assigned to the wireless LAN base station 6, and a reception data conversion unit 26.

The transmission data converter 22 is composed of a well-known logic circuit using a dedicated LSI, a general-purpose microprocessor, or the like. From the terminal 14, a computer bus, an I / O interface such as SCCI, or ITU. -T Recommendation I. ATM-NIC defined by H.432
Via ATM, ATM data consisting of data to be transmitted and an address which is information of the destination is input, converted into packet transmission data in which a header including address information is attached to the data, and the frequency of the wireless transmission unit 20 is set. The signal is output to the wireless transmission unit 20 at a compatible and preset symbol rate.

The radio transmission section 20 is composed of a known digital modulator, frequency converter, amplifier, antenna and the like.
As the radio frequency channel of the radio transmission unit 20, a frequency channel uniquely assigned to the wireless LAN terminal device 8 is used among a plurality of frequency channels assigned in the same cell 10. That is, the same cell 10
Within, wireless L transmitting using the same frequency channel
There is no other AN terminal device 8. In this way, the wireless transmission unit 20 transmits the packet transmission data obtained from the transmission data conversion unit 22 on the assigned frequency channel.

The radio receiving section 24 comprises four radio receiving sections 24a, 24b, 24c, 2 each of which is composed of a known antenna, amplifier, frequency converter, digital demodulator, etc.
Parted in 4d. Of these, three wireless reception units 24a,
24b and 24c are set to be receivable from the frequency channel of each wireless transmission unit 20 provided in another wireless LAN terminal device 8, and one wireless reception unit 24d is set from the frequency channel of the wireless LAN base station 6. It is set to receive. Therefore, the wireless reception unit 24 can receive all the transmission data of other wireless LAN terminal devices 8 in the same cell 10, and outputs the received packet transmission data to the reception data conversion unit 26.

The reception data conversion unit 26 is composed of a known logic circuit similarly to the transmission data conversion unit 22, and is a wireless LAN in the same cell 10 obtained from the wireless reception units 24a, 24b, 24c and 24d. The packet transmission data transmitted by the terminal device 8 is input, data for the self terminal 14 is extracted from the address information, converted into ATM data, and output to the terminal 14 side.

Next, FIG. 4 shows a procedure in which the wireless LAN terminal devices 8 shown in FIG. 3 mutually perform data transmission. The four wireless LAN terminal devices 8 are represented by A, B, C and D. Here, the wireless LAN terminal device 8 of B is the other A, C, D
Consider a case where data is transmitted from the wireless LAN terminal device 8 of FIG.

First, the wireless LAN terminal device 8 of A transmits data on the frequency channel F1, and the wireless LAN terminal device 8 of B transmits.
The terminal device 8 transmits data on the frequency channel F2, the wireless LAN terminal device 8 of C transmits on the frequency channel F3, and the wireless LAN terminal device 8 of D transmits data on the frequency channel F4. The wireless LAN terminal device 8 of A, the data addressed to the wireless LAN terminal device 8 of B → the data addressed to the wireless LAN terminal device 8 of C →
The packet transmission data is transmitted in the order of data addressed to the wireless LAN terminal device 8 of D → data addressed to the wireless LAN terminal device 8 of B. The wireless LAN terminal device 8 of C at almost the same timing
Is data addressed to the wireless LAN terminal device 8 of A → wireless LA of B
The packet transmission data is transmitted in the order of N terminal device 8 addressed data → D wireless LAN terminal device 8 addressed data → A wireless LAN terminal device 8 addressed data. Further, at almost the same timing, the wireless LAN terminal device 8 of D transmits the data addressed to the wireless LAN terminal device 8 of A → the data addressed to the wireless LAN terminal device 8 of B →
The packet transmission data is transmitted in the order of data addressed to the wireless LAN terminal device 8 of C → data addressed to the wireless LAN terminal device 8 of A.

In the wireless LAN terminal device 8 of B, the three wireless receiving units 24a, 24b and 24c receive the packet transmission data from the other three wireless LAN terminal devices 8 from the frequency channels F1, F3 and F4. . From these received data (packet transmission data), the reception data conversion unit 26 extracts the data addressed to itself from the header information added to each packet transmission data. As shown in the figure, at timing t1, the packet transmission data addressed to itself is extracted from the received data from the wireless LAN terminal device 8 of A, and at timing t2, the received data from the wireless LAN terminal device 8 of C and D is addressed to itself. Packet transmission data is extracted, and at timing t4, the packet transmission data addressed to itself is extracted from the received data from the wireless LAN terminal device 8 of A. These extracted packet transmission data are temporarily stored in the buffer in the reception data conversion unit 26,
The data is sequentially converted into ATM data and output to the terminal 14 side.

The other A, C, and D wireless LAN terminal devices 8 also receive packet transmission data from the other wireless LAN terminal devices 8, respectively, so that the B wireless L
By performing the same processing as the AN terminal device 8, the received packet transmission data addressed to itself is converted into ATM data and output to each terminal 14.

For transmitting packet transmission data to the wireless LAN terminal device 8 of another cell 10 via the wireless LAN base station 6, the wireless LAN terminal device 8 of the other cell 10 is designated in the header Ah of the ATM data. By doing so, it is described in the headers Ph1 and Ph2 of the packet transmission data to be transmitted. The wireless LAN base station 6 extracts the packet transmission data of the header from the received data, converts it into ATM data, and through the node switch 4, the wireless LAN base station of the cell 10 in which the corresponding wireless LAN terminal device 8 exists. 6 from the frequency channel assigned to the wireless LAN base station 6. The wireless LAN terminal device 8 of the cell 10 is
The data is received from the wireless receiving unit 24d for the frequency channel assigned to the wireless LAN base station 6, and if it is data for itself, it is converted into ATM data and transmitted to the own terminal 14.

With the above-described configuration and operation, when directly performing inter-terminal communication in each cell 10, each wireless LAN terminal device 8 transmits data to any wireless LAN terminal device 8 at any time. However, on the receiving side, multiple wireless L
Since the packet transmission data transmitted from the AN terminal device 8 are received on different frequency channels, respectively, the data from each wireless LAN terminal device 8 is received separately without collision even if the transmission timings overlap. be able to. Further, since the data is added with the header containing the information of the destination, the data addressed to itself can be extracted based on the header.

Therefore, each wireless LAN terminal device 8
Even if the transmission is duplicated, the transmission does not fail and the packet transmission data can be arbitrarily transmitted to the receiving side at any time without waiting for the already performed communication. In this way, the wireless LAN terminal device 8 on the receiving side can obtain the packet transmission data at the same time, so that the processing can be performed early. Further, since such a function is realized by providing the wireless receiving unit 24 capable of receiving a plurality of frequency channels in each wireless LAN terminal device 8, communication control for multiple access is not required, It can be realized with a simple configuration.

In the present embodiment, the wireless transmitter 20 corresponds to the wireless transmitter, the wireless receiver 24 corresponds to the wireless receiver, and the reception data converter 26 corresponds to the data extractor. [Second Embodiment] Next, a second embodiment of the present invention will be described. The present wireless LAN terminal device 108 differs from the first embodiment in that the data transmission source is distinguished by the spread spectrum method. Here, only the configuration of one wireless LAN terminal device 108 is shown, but the other wireless LAN terminal device 10 is shown.
8 has the same configuration except that the spread spectrum code for modulation / demodulation is different.

The wireless LAN terminal device 108 includes a data transmission section 123 and a data reception section 127. The data transmission unit 123 includes a wireless transmission unit 20, a transmission data conversion unit 22, a spread spectrum code generation unit 130, and a spread spectrum modulator 132. Wireless transmitter 20
The transmission data conversion unit 22 and the transmission data conversion unit 22 are the same as those described in the first embodiment. However, the difference is that the wireless transmission unit 20 commonly uses one frequency channel assigned to the cell 10 in each cell 10. . The spread spectrum code generator 130 is composed of a known PN sequence code generator. As the spread spectrum code generated by the spread spectrum code generation unit 130, a code uniquely assigned to itself is used. That is, within the same cell 10, a wireless LA that performs spread spectrum modulation using the same spread spectrum code.
There is no other N terminal device 108. The spread spectrum modulator 132 performs spread spectrum modulation on the transmission data and outputs the transmission data to the wireless transmission unit 20. The spread spectrum modulator 132 is a direct spread spectrum spread modulator using a known PN sequence.

The data receiving section 127 includes a radio receiving section 24,
Reception data conversion unit 26, four synchronization units 140, 14
2, 144, 146, four spread spectrum demodulators 15
0, 152, 154, 156 are provided. The wireless reception unit 24 and the reception data conversion unit 26 are as described in the first embodiment, but the wireless reception unit 24 is the same as that used by the wireless transmission unit 20 in each cell 10 and the cell described above. The difference is that one frequency channel assigned to 10 is commonly used.

Synchronizer 140, 142, 144, 146
Is composed of a known PN code synchronizing circuit such as a baseband delay locked loop. Each spread spectrum demodulator 15
Of the combinations of 0, 152, 154, 156 and the synchronization means,
The three combinations of the synchronization units 140, 142, 144 and the spread spectrum demodulators 150, 152, 154 are synchronized with the spread spectrum codes assigned to the other three wireless LAN terminal devices 108 in the same cell 10, Each wireless LAN
The packet transmission data transmitted by the terminal device 108 is set to be spread spectrum demodulated. Therefore, all the packet transmission data transmitted by the other plurality of wireless LAN terminal devices 108 in the same cell 10 can be separately received. The other combination of the synchronization unit 146 and the spread spectrum demodulator 156 is for transmission from the wireless LAN base station 6. The transmission / reception part of the wireless LAN base station 6 is the same as each wireless LAN terminal device 108 except that the spread spectrum code generated by the spread spectrum code generation unit 130 and the spread spectrum code synchronized by the synchronization units 140 to 146 are different. It is composed of.

Next, the wireless LAN terminal device 1 shown in FIG.
6 shows a procedure in which the wireless LAN terminal devices 108 mutually perform data transmission via 08. The four wireless LAN terminal devices 108 are represented by A, B, C and D. Here, consider a case where the wireless LAN terminal device 108 of B receives data from the other wireless LAN terminal devices 108 of A, C, and D. The wireless LAN terminal device A of A transmits data with the spread spectrum code P1, and the wireless LAN terminal device B of B spread spectrum codes P2 and C of the wireless LAN.
The terminal device 108 uses the wireless L of the spread spectrum codes P3 and D.
The AN terminal device 108 is transmitting data with the spread spectrum code P4. The wireless LAN terminal device 108 of A is
Wireless LAN terminal device 108 data → C wireless LAN
Data addressed to the terminal device 108 → D wireless LAN terminal device 10
The packet transmission data is transmitted in the order of data destined for 8 → data destined for the wireless LAN terminal device 108 of B. At almost the same timing, the wireless LAN terminal device 108 of C displays the wireless LA of A.
Data addressed to N terminal device 108 → B wireless LAN terminal device 1
The packet transmission data is transmitted in the order of data addressed to 08 → data addressed to wireless LAN terminal device 108 → data addressed to wireless LAN terminal device 108 A. Further, at almost the same timing, the wireless LAN terminal device 108 of D is connected to the wireless LAN of A.
Data addressed to the terminal device 108 → B wireless LAN terminal device 10
Data addressed to 8 → Data addressed to wireless LAN terminal device 108 of C →
The packet transmission data is transmitted in the order of the data addressed to the wireless LAN terminal device 108 of A.

In the wireless LAN terminal device 108 of B, the spread spectrum codes P1, P3, and P3 are transmitted from the other three wireless LAN terminal devices 108 in one wireless receiving section 24, respectively.
At P4, the spread spectrum modulated packet transmission data is received. The received data is spread spectrum demodulated by the synchronization units 140 to 146 and spread spectrum demodulators 150 to 156, respectively. Of the packet transmission data from the other three wireless LAN terminal devices 108, the wireless LA of A
The packet transmission data from the N terminal device 108 is spread-spectrum demodulated by the synchronization unit 140 and the spread spectrum demodulator 150, and the packet transmission data from the wireless LAN terminal device C of C is transmitted by the synchronization unit 142 and the spread spectrum demodulator 152. Spread spectrum demodulation, D
The packet transmission data from the wireless LAN terminal device 108 is subjected to spread spectrum demodulation by the synchronizing section 144 and the spread spectrum demodulator 154 and transmitted to the receiving data converting section 26. The synchronization unit 146 and the spread spectrum demodulator 156 are for spread spectrum demodulation of packet transmission data from the wireless LAN base station 6.

From these spread spectrum demodulated received data, the receiving data converting section 26 extracts the data addressed to itself from the added header information. As illustrated, at the timing t1, the wireless LAN terminal device 10 of A is
The packet transmission data addressed to itself from 8 is extracted, and at timing t2, the packet transmission data addressed to itself from the C and D wireless LAN terminal devices 108 is extracted, and at timing t.
In 4, the packet transmission data addressed to itself from the wireless LAN terminal device A of A is extracted. These extracted packet transmission data are temporarily stored in the buffer in the reception data conversion unit 26, are sequentially converted into ATM data, and are output to the terminal 14 side.

Other A, C, D wireless LAN terminal devices 10
Also for 8, the other wireless LAN terminal device 10
Since the packet transmission data from 8 is received, B
By performing the same processing as that of the wireless LAN terminal device 108, the received packet transmission data addressed to itself is AT
It is converted into M data and output to each terminal 14.

Since the wireless LAN base station 6 also has the same configuration as the wireless LAN terminal device 108 for transmission and reception, it is possible to distinguish and receive the transmissions of the four wireless LAN terminal devices 108 by the spread spectrum demodulation. The corresponding packet transmission data is extracted based on the above, converted into ATM data, and the corresponding wireless LAN is transmitted through the node switch 4.
The wireless LAN base station 6 of the cell 10 in which the terminal device 108 is present transmits on the common frequency channel assigned to the cell 10. The wireless LAN terminal device 108 of the cell 10 receives on the common frequency channel assigned to the cell 10, and if it is data for itself, converts it to ATM data and transmits it to the terminal 14.

With the above-described configuration and operation, when directly performing inter-terminal communication in each cell 10, each wireless LAN terminal device 108 transmits data to any wireless LAN terminal device 108 at any time. However, on the receiving side, the packet transmission data transmitted from the plurality of wireless LAN terminal devices 108 on one common frequency channel are modulated by different spread spectrum codes, so that the transmission timings overlap. Also, the synchronization units 140 to 146 and the spread spectrum demodulators 150 to 156 can be separated for each transmission side, and data from each wireless LAN terminal device 108 can be received without data collision. . Further, since the data is added with the header containing the information of the destination, the data addressed to itself can be extracted based on the header.

Therefore, each wireless LAN terminal device 108
The packet transmission data can be arbitrarily transmitted to the receiving side at any time without causing a transmission failure even if the transmissions are duplicated and without waiting for the already performed communication. In this way, since the wireless LAN terminal device 108 on the receiving side can obtain the packet transmission data at the same time, the processing can be performed early. Further, since such a function is realized by providing each of the wireless LAN terminal devices 108 with the plurality of synchronization units 140 to 146 and the plurality of spread spectrum demodulators 150 to 156, it is possible to perform multiple access. It can be realized with a simple configuration without the need for communication control.

In the present embodiment, the spread spectrum code generator 130 and the spread spectrum modulator 132 are synchronized with the spread spectrum modulator, the wireless transmitter 20 is synchronized with the wireless transmitter, and the wireless receiver 24 is synchronized with the wireless receiver. Part 140-
144 and the spread spectrum demodulators 150 to 154 correspond to the spread spectrum demodulation means, and the reception data conversion section 26 corresponds to the data extraction means.

[Third Embodiment] Next, a third embodiment of the present invention will be described. In the present wireless LAN terminal device 208, it is implemented that the data transmission source and the data transmission destination are distinguished by the frequency channel assigned corresponding to the combination of the wireless LAN terminal devices 208 including the wireless LAN base station 6. Form 1 is different. Again, one wireless LAN
Although only the configuration of the terminal device 208 is shown, other wireless LAN terminal devices 208 have the same configuration except that the combination of frequency channels used is different.

The wireless LAN terminal device 208 comprises a data transmitting section 223 and a data receiving section 227. The data transmitting unit 223 includes four wireless transmitting units 220a and 220a.
b, 220c, 220d and the transmission data converter 22
2 is provided.

The transmission data conversion unit 222 converts the ATM data transmitted from the terminal 14 side into packet transmission data suitable for transmission by the wireless transmission unit 20, and also performs four wireless transmissions based on the header Ah of the ATM data. Part 220
The packet transmission data is output to any one of the wireless transmission units 220a to 220d selected from a, 220b, 220c, and 220d at a symbol rate suitable for the frequency band.

In the wireless transmitters 220a to 220d, the wireless LAN terminal device 208 and the same cell 10 on the receiving side are connected.
Of the other three wireless LAN terminal devices 208 or the wireless LAN base station 6 in the assigned frequency channels, respectively, the transmission data conversion unit 222 for transmission.
The packet transmission data transmitted from is wirelessly transmitted.

The data receiving section 227 has this wireless LAN.
The terminal device 208 and the other three wireless LAN terminal devices 208 or wireless L existing in the same cell 10 on the transmission side.
Radio receiving units 224a and 224 corresponding to the frequency channels assigned corresponding to the combination with the AN base station 6
b, 224c, 224d, and the reception data conversion unit 226.
And are provided.

The radio transmitters 220a to 220d are the same as the radio transmitter 20 of the first embodiment except that the frequency channels are different. Transmission data conversion unit 222
Is the same as the transmission data conversion unit 22 of the first embodiment except that the symbol rate is changed and the radio transmission units 220a to 220d are selected according to the content of the header Ah of the ATM data.

The radio receiving units 224a to 224d are the same as the radio receiving unit 24 of the first embodiment except that the frequency channels are different. Reception data conversion unit 226
Is different from the reception data conversion unit 26 of the first embodiment in that the packet transmission data to be received is only data destined for itself and is therefore all converted to ATM data and transmitted to the own terminal 14.

Next, the wireless LAN terminal device 2 shown in FIG.
FIG. 8 shows a procedure in which the wireless LAN terminal devices 208 mutually perform data transmission via 08. The four wireless LAN terminal devices 208 are represented by A, B, C and D. Here, consider a case where the wireless LAN terminal device 208 of B receives data transmission from the other wireless LAN terminal devices 208 of A, C, and D.

The wireless LAN terminal 208 of A has a frequency channel F12 to the wireless LAN terminal 208 of B.
Then, data is transmitted to the wireless LAN terminal device 208 of C on the frequency channel F13 and to the wireless LAN terminal device 208 of D on the frequency channel F14, and the wireless LAN terminal B is transmitted.
The terminal device 208 uses the frequency channel F21 for the wireless LAN terminal device 208 of A and the wireless LAN terminal device 2 of C.
08, data is transmitted to the D wireless LAN terminal device 208 by frequency channel F23, and the C wireless LAN terminal device 208 transmits data to the A wireless L terminal device 208.
In the AN terminal device 208, the frequency channel F31, B
The wireless LAN terminal device 208 has a frequency channel F3.
2, the data is transmitted to the wireless LAN terminal device 208 of D on the frequency channel F34, and the wireless LAN terminal device 208 of D transmits to the wireless LAN terminal device 208 of A on frequency channel F41 and the wireless LAN terminal of B. Data is transmitted to the device 208 on the frequency channel F42 and to the C wireless LAN terminal device 208 on the frequency channel F43. That is, the wireless L is provided on 12 types of frequency channels.
The AN terminal devices 208 communicate with each other. Further, although not shown, eight types of frequency channels are prepared for communication between the wireless LAN base station 6 and the four wireless LAN terminal devices 208.

The wireless LAN terminal device 208 of A is addressed to the wireless LAN terminal device 208 of B, and the wireless LAN terminal device 2 of C is connected.
08 and the packet transmission data addressed to the wireless LAN terminal device 208 of D are respectively transmitted to the three wireless transmission units 220a to 220a.
It is transmitted from 220c. At almost the same timing, the wireless LAN terminal device 208 of C is connected to the wireless LAN terminal device 2 of A.
The packet transmission data addressed to 08, the wireless LAN terminal device 208 of B and the wireless LAN terminal device 208 of D are respectively transmitted from the three wireless transmission units 220a to 220c. Furthermore, at substantially the same timing, the wireless LAN terminal device 208 of D sets 3 pieces of packet transmission data to the wireless LAN terminal device 208 of A, the wireless LAN terminal device 208 of B, and the wireless LAN terminal device 208 of C, respectively. It transmits from one wireless transmission part 220a-220c.

Here, in the wireless LAN terminal device 208 of B, the three wireless receiving units 224a, 224b and 224c transmit packets from the other three wireless LAN terminal devices 208 on the frequency channels F12, F32 and F42, respectively. Receive data. Since only the data addressed to itself is received, these received data (packet transmission data) are all converted into ATM data without being distinguished by the header and transmitted to the own terminal 14.

Other A, C, D wireless LAN terminal devices 20
Similarly, since the packet transmission data of each of the wireless communication terminals 8 are similarly received from the other wireless LAN terminal devices 208, all of the received packet transmission data are converted into ATM data and output to the respective terminals 14.

The transmission of the packet transmission data to the wireless LAN terminal device 208 of the other cell 10 via the wireless LAN base station 6 is performed by the wireless transmission section 220d based on the header Ah of the ATM data. , Wireless LAN
The base station 6 converts the received data as it is into ATM data and, via the node switch 4, the wireless LAN base station 6 of the cell 10 in which the corresponding wireless LAN terminal device 208 exists to the wireless LAN base station 6 and the corresponding wireless LAN. Transmission is performed on the frequency channel assigned corresponding to the combination with the LAN terminal device 208. The wireless LAN terminal device 208 of the cell 10 has the wireless receiving unit 24 for the frequency channel.
It is received from d, converted into ATM data as it is, and transmitted to the own terminal 14.

With the above-described configuration and operation, when directly performing inter-terminal communication in each cell 10, each wireless LAN terminal device 208 transmits data to any wireless LAN terminal device 208 at any time. However, on the receiving side, the packet transmission data transmitted from the plurality of wireless LAN terminal devices 208 are respectively received on different frequency channels, so that even if the transmission timings overlap, the data will not collide with each other and the wireless LANs will not collide. Data from the terminal device 208 can be received. In addition, since the data uses the dedicated frequency channel corresponding to the combination of the transmitting side and the receiving side, if it is received, it is the data addressed to itself, so the ATM data can be extracted without performing the extraction process. It can be converted into a message and transmitted to the terminal 14.

Therefore, each wireless LAN terminal device 208
The packet transmission data can be arbitrarily transmitted to the receiving side at any time without causing a transmission failure even if the transmissions are duplicated and without waiting for the already performed communication. In this way, the wireless LAN terminal device 208 on the receiving side can obtain the packet transmission data at the same time, so that the processing can be performed early. In addition, such a function is provided in each wireless LAN terminal device 208 by a plurality of wireless transmission units 220a to 220a.
Since it is realized by providing 20d and a plurality of wireless reception units 224a to 224d, communication control for multiple access is not necessary and a simple configuration can be realized.

In the present embodiment, wireless transmission section 220
a to 220c are wireless transmission means, and wireless reception units 224a to 224a to
224c corresponds to the wireless receiving means. [Fourth Embodiment] Next, a fourth embodiment of the present invention will be described. In the present wireless LAN terminal device 308, a packet spread-spectrum-modulated by the spread-spectrum code assigned to itself in the frequency channel assigned corresponding to the destination wireless LAN terminal device 308 including the wireless LAN base station 6. The difference from the first embodiment is that the transmission source of the data is distinguished from the transmission destination of the data by transmitting the transmission data. Again, one wireless LAN terminal device 30
Although only the configuration of No. 8 is shown, another wireless LAN terminal device 308
Also has the same configuration except that the frequency channel or the spread spectrum code for modulation and demodulation is different.

The wireless LAN terminal device 308 comprises a data transmitting section 323 and a data receiving section 327. The data transmission unit 323 includes four wireless transmission units 320a and 320a.
b, 320c, 320d, a transmission data conversion unit 322,
Spread spectrum code generation section 330 and four spread spectrum modulators 332a, 332b, 332c, 332d
The transmission data conversion unit 322 includes four wireless transmission units 320a and 320 based on the ATM data header Ah for the ATM data transmitted from the terminal 14 side.
b, 320c, or 320d, the packet transmission data suitable for the transmission is converted, and the packet transmission data is output to any of the spread spectrum modulators 332a to 332d.

The spread spectrum code generator 330 is composed of a known PN sequence code generator. As the spread spectrum code generated by the spread spectrum code generator 330, a code uniquely assigned to itself is used. That is, within the same cell 10, a wireless LAN terminal device 10 that performs spread spectrum modulation using the same spread spectrum code
No other 8 exists. 4 spread spectrum modulators 3
32a to 332d have different symbol rates for modulation in order to adapt to the frequency channel to be transmitted, but the same spread spectrum code from the spread spectrum code generator 330 is used to spread the packet transmission data. Each wireless transmission unit 320a is modulated.
To 320d. This spread spectrum modulator 33
Each of 2a to 332d is composed of a direct spread spectrum spread spectrum modulator using a known PN sequence.

The wireless transmitters 320a to 320d respectively use the frequency channels assigned to the other three wireless LAN terminal devices 308 in the same cell 10 as the wireless LAN terminal device 308 or the wireless LAN base station 6 respectively. The spread spectrum modulated packet transmission data transmitted from the spread spectrum modulators 332a to 332d are wirelessly transmitted.

The data receiving unit 327 has a radio receiving unit 324 corresponding to the frequency channel assigned to itself,
Synchronization units 340a, 340b, 340c, 340d, spread spectrum demodulators 350a, 350b, 350c, 35
0d and a reception data converter 326 are provided.

Radio transmitting sections 320a to 320d are the same as radio transmitting section 20 of the first embodiment except that the frequency channels are different. Transmission data conversion unit 322
Is a spread spectrum modulator 332a corresponding to a different symbol rate depending on the content of the header Ah of ATM data.
To 332d and the wireless transmission units 320a to 320d, except for the function of selecting the transmission data conversion unit 2 of the first embodiment.
Same as 2.

Radio receiving section 324 is the same as radio receiving section 24 of the first embodiment except that the frequency channel is different. Each combination of the three synchronization units 340a to 340c and the three spread spectrum demodulators 350a to 350c corresponds to the other three wireless LAN terminal devices 308. That is, each of the other three wireless LAN terminal devices 30
It is possible to spread spectrum demodulate only one of the packet transmission data that has been spread spectrum modulated in 8. The remaining synchronizing section 340d and spread spectrum demodulator 350d are dedicated to spread spectrum demodulation of spread spectrum modulated packet transmission data from the wireless LAN base station 6.

Since the receiving data converting section 326 receives only packet-destined data as data addressed to itself, all of the data is converted into ATM data and sent to the own terminal 14 as the receiving data in the first embodiment. Different from the conversion unit 26. Next, FIG. 10 shows a procedure in which each wireless LAN terminal device 308 mutually transmits data via the wireless LAN terminal device 308 shown in FIG. The four wireless LAN terminal devices 308 are represented by A, B, C and D. Here, the wireless LAN terminal device 308 of B is the wireless LA of other A, C, D
Consider a case where data is transmitted from the N terminal device 308.

To the wireless LAN terminal device 308 of A, the other wireless LAN terminal device 308 is connected to the frequency channel F1.
Then, data is transmitted to the wireless LAN terminal device 308 of B on the frequency channel F2, to the wireless LAN terminal device 308 of C on the frequency channel F3, and to the wireless LAN terminal device 308 of D on the frequency channel F4. That is, the wireless LA is used on four types of frequency channels corresponding to the receiving side.
The N terminal devices 308 communicate with each other. Further, although not shown, one more type of frequency channel is prepared for communication between the wireless LAN base station 6 and the four wireless LAN terminal devices 308.

The wireless LAN terminal device 308 of A is addressed to the wireless LAN terminal device 308 of B, and the wireless LAN terminal device 3 of C is
08 and the packet transmission data addressed to the wireless LAN terminal device 308 of D respectively.
30 and the spread spectrum modulators 332a to 332c perform spread spectrum modulation with the spread spectrum code P1 corresponding to itself, and then transmit from the three wireless transmission units 320a to 320c on the frequency channels corresponding to the destinations, respectively. The wireless LAN terminal device 308 of C and the wireless LAN terminal device 30 of A similarly operate at substantially the same timing.
8, the packet transmission data addressed to the wireless LAN terminal device 308 of B and the wireless LAN terminal device 308 of D are respectively subjected to the spread spectrum code P3 spread spectrum modulation corresponding to the self, and then in the frequency channel corresponding to the destination. Send. Furthermore, at almost the same timing, the wireless L of D
The AN terminal device 308 is the wireless LAN terminal device 308 of A.
To the wireless LAN terminal device 308 of B and the wireless L of C
Each of the packet transmission data addressed to the AN terminal device 308 is spread-spectrum-modulated by the spread-spectrum code P4 corresponding to itself, and then transmitted on the frequency channel corresponding to the destination.

Here, in the wireless LAN terminal device 308 of B, the wireless receiving section 324 receives the packet transmission data from the frequency channel F2 corresponding to itself from the other three wireless LAN terminal devices 308. These received data (packet transmission data) are then subjected to three synchronization units 34 for spread spectrum demodulation corresponding to the transmission source.
0a to 340c and three spread spectrum demodulators 350a
Processed in combination with ~ 350c. As a result, only the data addressed to itself is transmitted to the reception data conversion unit 326. Therefore, the reception data conversion unit 326 converts all the ATM data into the ATM data without distinguishing the header and transmits the ATM data to the terminal 14.

Other A, C, D wireless LAN terminal devices 30
Similarly, packet transmission data is also received from the other wireless LAN terminal devices 308, so that all of the packet transmission data received and subjected to the spread spectrum demodulation are converted into ATM data, and the data is transmitted to each terminal. Output to 14.

Note that the packet transmission data is transmitted to the terminal 14 of another cell 10 via the wireless LAN base station 6 by the AT.
The wireless LAN base station 6 converts the received data after the spread spectrum demodulation as it is into ATM data by being transmitted from the wireless transmission unit 320d via the spread spectrum modulator 332d based on the header Ah of the M data. After the spread spectrum modulation corresponding to the wireless LAN base station 6 from the wireless LAN base station 6 of the cell 10 in which the corresponding terminal 14 exists via the node switch 4, the corresponding wireless LAN
The signal is transmitted on the frequency channel assigned to the terminal device 308. Wireless LAN terminal device 308 of the cell 10
Receives from the radio receiving unit 324 for the frequency channel, performs spread spectrum demodulation, converts the ATM data as it is, and transmits the ATM data to the own terminal 14.

With the above-described configuration and operation, when directly performing terminal-to-terminal communication in each cell 10, each wireless LAN terminal device 308 transmits data to any wireless LAN terminal device 308 at any time. However, on the receiving side, after receiving the packet transmission data transmitted from the plurality of wireless LAN terminal devices 308 on the frequency channel dedicated to itself,
Since the spread spectrum demodulation according to the transmission source is performed, the data from each wireless LAN terminal device 308 can be received without the data colliding even if the transmission timings overlap. Further, since the packet transmission data obtained via the wireless reception unit 324 and the spread spectrum demodulators 350a to 350d is the data addressed to itself as it is, it is converted to ATM data without performing the extraction processing, It can be transmitted to the own terminal 14.

Therefore, each wireless LAN terminal device 308
The packet transmission data can be arbitrarily transmitted to the receiving side at any time without causing a transmission failure even if the transmissions are duplicated and without waiting for the communication already performed.
In this way, the wireless LAN terminal device 308 on the receiving side can obtain the packet transmission data at the same time, so that the processing can be performed early. In addition, such a function is provided by each wireless LA.
In the N terminal device 308, the transmission data conversion unit 322, the spread spectrum code generation unit 330, the spread spectrum modulator 3
32a to 332d, wireless transmission units 320a to 320d, wireless reception unit 324, synchronization units 340a to 340d, spread spectrum demodulators 350a to 350d, and reception data conversion unit 326. The communication control for connection is not required, and it can be realized with a simple configuration.

In the present embodiment, the spread spectrum code generator 330 and spread spectrum modulators 332a to 332a.
2c is a spread spectrum modulation means, and the wireless transmission unit 320
a to 320c correspond to the wireless transmission means, the wireless reception unit 324 corresponds to the wireless reception means, and the synchronization units 340a to 340c and the spread spectrum demodulators 350a to 350c correspond to the spread spectrum demodulation means.

[Fifth Embodiment] Next, a fifth embodiment of the present invention will be described. In this wireless LAN terminal device 408, the packet transmission data subjected to spread spectrum modulation with the spread spectrum code assigned corresponding to the destination wireless LAN terminal device 408 including the wireless LAN base station 6 is allocated to the frequency assigned to itself. The difference from the fourth embodiment is that the data transmission source and the data transmission destination are distinguished by transmitting by the channel. Again, one wireless LAN
Although only the configuration of the terminal device 408 is shown, the other wireless LAN terminal device 408 also has the same configuration except that the frequency channel or the spread spectrum code for modulation / demodulation is different.

The wireless LAN terminal device 408 comprises a data transmitting section 423 and a data receiving section 427. The data transmission unit 423 includes a wireless transmission unit 420, a transmission data conversion unit 422, four spread spectrum code generation units 430a,
430b, 430c, 430d, four spread spectrum modulators 432a, 432b, 432c, 432d and a combining unit 433, and a transmission data conversion unit 422.
Converts ATM data transmitted from the terminal 14 side into packet transmission data suitable for transmission by the wireless transmission unit 420, and selects one of the four spread spectrum modulators 432a to 432d based on the header Ah of the ATM data. The packet transmission data is output to the spread spectrum modulators 432a to 432d.

Spread spectrum code generation sections 430a-43.
0d is a known PN sequence code generator. Each spread spectrum code generated by the spread spectrum code generation units 430a to 430d is a code uniquely assigned to another wireless LAN terminal device 108 in the same cell 10. Four spread spectrum modulators 432a-
432d spread-spectrum modulates the packet transmission data with different spread-spectrum codes from the spread-spectrum code generators 430a to 430d corresponding to the transmission destinations. Then, the combining unit 433 combines the spread spectrum modulated packet transmission data, and the wireless transmission unit 420
Output to

The wireless transmission section 420 wirelessly transmits the combined packet transmission data on the frequency channel assigned to the wireless LAN terminal device 408. The data receiving unit 427 includes four radio receiving units 424a, 4a corresponding to the frequency channels assigned corresponding to the transmission sources.
24b, 424c, 424d, a synchronization unit 440, four spread spectrum demodulators 450a, 450b, 450c, 4
50d and a reception data conversion unit 426 are provided.

Radio transmitting section 420 is the same as radio transmitting section 20 of the first embodiment except that the frequency channel is different. The transmission data converter 422 determines the spread spectrum modulator 432a according to the content of the header Ah of the ATM data.
It is the same as the transmission data conversion unit 22 of the first embodiment, except that ˜432d is selected.

Radio receiving sections 424a to 424d are the same as radio receiving section 24 of the first embodiment except that the frequency channels differ depending on the transmission source. The combination of the synchronization unit 440 and the spread spectrum demodulators 450a to 450d is
The spread spectrum code for demodulation is its own. That is, from the packet transmission data received by each of the four wireless reception units 424a, only the data addressed to itself is subjected to spread spectrum demodulation and the reception data conversion unit 426 is performed.
Send to.

As described above, since the packet transmission data received by the receiving data converter 426 is only the data destined for itself, all the packet transmission data is converted into ATM data and the own terminal 1
4 is the point that data is transmitted to the receiving data conversion unit 2 of the first embodiment.
Different from 6. Next, FIG. 12 shows a procedure in which the respective wireless LAN terminal devices 408 mutually perform data transmission via the wireless LAN terminal device 408 shown in FIG. 4 wireless LA
The N terminal device 408 is represented by A, B, C, and D. Here, consider a case where the wireless LAN terminal device 408 of B receives data from the other wireless LAN terminal devices 408 of A, C, and D.

From the wireless LAN terminal device 408 of A to another wireless LAN terminal device 408, the frequency channel F1
Then, the wireless LAN terminal device 408 of B transmits data on the frequency channel F2, the wireless LAN terminal device 408 of C transmits frequency channel F3, and the wireless LAN terminal device 408 of D transmits data on the frequency channel F4. That is, the wireless LAN terminal devices 408 communicate with each other on four types of frequency channels. Although not shown, one more type of frequency channel is prepared for transmission from the wireless LAN base station 6 to the four wireless LAN terminal devices 408.

The wireless LAN terminal device 408 of A is addressed to the wireless LAN terminal device 408 of B, and the wireless LAN terminal device 4 of C is connected.
08 and the packet transmission data addressed to the wireless LAN terminal device 408 of D, respectively, to the spread spectrum code generation unit 4
30a-430c and spread spectrum modulators 432a-4
32c spread spectrum code P corresponding to the destination
2, P3 and P4 perform spread spectrum modulation, and combiner 433
After synthesizing with, frequency channel F1 corresponding to self
Is transmitted from the wireless transmission section 420. At approximately the same timing, the wireless LAN terminal device 408 of C similarly
The packet transmission data addressed to the wireless LAN terminal device 408 of A, the wireless LAN terminal device 408 of B, and the wireless LAN terminal device 408 of D are spread-spectrum modulated by the spread spectrum codes P1, P2, and P4 corresponding to the destinations, respectively. After that, it transmits on the frequency channel F3 corresponding to itself. Furthermore, at almost the same timing, the wireless LAN terminal device 408 of D is addressed to the wireless LAN terminal device 408 of A, and
Of the packet transmission data addressed to the wireless LAN terminal device 408 of C and the wireless LAN terminal device 408 of C are spread-spectrum-modulated by the spread-spectrum codes P1, P2, and P3 corresponding to the destinations, respectively, and then the frequency channel F4 corresponding to the self is transmitted. Send at.

Here, in the wireless LAN terminal device 408 of B, the wireless receiving units 424a to 424c from the other three wireless LAN terminal devices 408 perform packet transmission from the frequency channels F1, F3 and F4 corresponding to the transmission sources, respectively. Receive data. These received data (packet transmission data) are then used by the synchronization unit 440 and the three spread spectrum demodulators 4 for the spread spectrum demodulation corresponding to the self.
Demodulation processing is performed in combination with 50a to 450c. As a result, only the data addressed to itself is transmitted to the reception data conversion unit 426. Therefore, the reception data conversion unit 426 converts all the ATM data into the ATM data without distinguishing the header and transmits the ATM data.

Other A, C, D wireless LAN terminal devices 40
Similarly, packet transmission data is also received from the other wireless LAN terminal devices 408, so that all of the packet transmission data received and subjected to spread spectrum demodulation are converted into ATM data, and the data is transmitted to each terminal. Output to 14.

Transmission of packet transmission data to the wireless LAN terminal device 408 of another cell 10 via the wireless LAN base station 6 is processed by the spread spectrum modulator 432d based on the ATM data header Ah. Then, after being combined, the wireless LAN base station 6 converts the received data after the spread spectrum demodulation into ATM data as it is and then transmits it from the wireless transmission unit 420 to the corresponding wireless LAN terminal via the node switch 4. From the wireless LAN base station 6 of the cell 10 in which the device 408 is present, the wireless LAN base station 6 is subjected to spread spectrum modulation by the spread spectrum code corresponding to the wireless LAN terminal device 408 of the transmission destination and then combined.
The signal is transmitted on the frequency channel assigned to the. The wireless LAN terminal device 408 of the cell 10 receives from the wireless receiving unit 424d for the frequency channel,
After spread spectrum demodulation corresponding to self, AT
It is converted into M data and transmitted to the own terminal 14.

With the above-described configuration and operation, when performing direct inter-terminal communication in each cell 10, each wireless LAN terminal device 408 transmits data to any wireless LAN terminal device 408 at any time. However, on the receiving side, since the packet transmission data transmitted from the plurality of wireless LAN terminal devices 408 is received on the frequency channel dedicated to the transmission source, the spread spectrum demodulation according to the self is performed, so that the transmission timings overlap. Even without data collision
Data can be received from each wireless LAN terminal device 408. Further, the packet transmission data obtained via the radio receiving units 424a to 424d and the spread spectrum demodulators 450a to 450d are the data addressed to themselves as they are, and therefore are converted into ATM data without performing the extraction processing. Then, it can be transmitted to the own terminal 14.

Therefore, each wireless LAN terminal device 408
The packet transmission data can be arbitrarily transmitted to the receiving side at any time without causing a transmission failure even if the transmissions are duplicated and without waiting for the already performed communication. In this way, the wireless LAN terminal device 408 on the receiving side can obtain the packet transmission data at the same time, so that the processing can be performed early. In addition, such a function is provided in each wireless LAN terminal device 408, the transmission data conversion unit 422,
Spread spectrum code generation units 430a to 430d, spread spectrum modulators 432a to 432d, and wireless transmission unit 42.
0, the wireless reception units 424a to 424d, the synchronization unit 440, the spread spectrum demodulators 450a to 450d, and the reception data conversion unit 426 are provided, so communication control for multiple access is not necessary. It can be realized with a simple configuration.

In the present embodiment, spread spectrum code generators 430a to 430c and spread spectrum modulator 4 are used.
32a to 432c are the spread spectrum modulation means, the wireless transmission section 420 is the wireless transmission means, and the wireless reception sections 424a to 424a.
Reference numeral 424c corresponds to the wireless receiving means, and the synchronizing section 440 and the spread spectrum demodulators 450a to 450c correspond to the spread spectrum demodulating means.

[Sixth Embodiment] Next, a sixth embodiment of the present invention will be described. In the present wireless LAN terminal device 508, spread spectrum modulation is performed with the spread spectrum code assigned corresponding to the combination of the transmission source wireless LAN terminal device 508 including the wireless LAN base station 6 and the transmission destination wireless LAN terminal device 508. This is different from the fifth embodiment in that the data transmission source and the data transmission destination are distinguished by transmitting the packet transmission data through the common frequency channel. Here, only the configuration of one wireless LAN terminal device 508 is shown, but other wireless LAN terminal devices 508 have the same configuration except that the spread spectrum code for modulation / demodulation is different.

The wireless LAN terminal device 508 comprises a data transmission section 523 and a data reception section 527. The data transmission unit 523 includes a wireless transmission unit 520, a transmission data conversion unit 522, four spread spectrum code generation units 530a,
530b, 530c, 530d, four spread spectrum modulators 532a, 532b, 532c, 532d, and a combining unit 533, and a transmission data conversion unit 522.
Converts ATM data transmitted from the terminal 14 side into packet transmission data suitable for transmission by the wireless transmission unit 520, and selects one of the four spread spectrum modulators 532a to 532d based on the ATM data header Ah. The packet transmission data is output to the spread spectrum modulators 532a to 532d.

Spread spectrum code generation sections 530a-53.
0d is a known PN sequence code generator. Each of the spread spectrum codes generated by the spread spectrum code generation units 530a to 530d is assigned according to the combination of itself and the other wireless LAN terminal device 108 and the wireless LAN base station 6 in the same cell 10 which is the transmission destination. It is a sign. That is, in the same cell 10, each wireless LAN
The terminal device 508 performs spread spectrum modulation using different spread spectrum codes depending on the combination with the transmission destination or the transmission source. Four spread spectrum modulators 532a
To 532d respectively perform spread spectrum modulation of packet transmission data with different spread spectrum codes from the spread spectrum code generation units 530a to 530d corresponding to the combination with the transmission destination. The packet transmission data after the spread spectrum modulation is combined by the combining unit 533 and then output to the wireless transmission unit 520.

The wireless transmission unit 520 wirelessly transmits the combined packet transmission data on the frequency channel common to the other wireless LAN terminal device 508 and the wireless LAN base station 6 in the same cell 10. The data receiving unit 527 includes a wireless receiving unit 524 and four synchronizing units 540a, 540b, 5
40c, 540d, four spread spectrum demodulators 550
a, 550b, 550c, 550d and a reception data converter 526 are provided.

Radio transmitting section 520 is the same as radio transmitting section 20 of the first embodiment except that the frequency channel is different. The transmission data converter 522 determines the spread spectrum modulator 532a according to the content of the header Ah of the ATM data.
It is the same as the transmission data conversion unit 22 of the first embodiment, except that ˜532 d is selected.

Radio receiving section 524 is the same as radio receiving section 24 of the first embodiment except that the frequency channel is different. The combination of the synchronization units 540a to 540d and the spread spectrum demodulators 550a to 550d is set according to the combination of the transmission source and itself. That is, from the packet transmission data received from the wireless reception unit 524, only the data addressed to itself is spectrum-spread by the spread spectrum demodulation with the inverse spread spectrum code for synchronization set according to the combination of the transmission source and the self. The data is spread and demodulated and transmitted to the reception data converter 526.

As described above, since the packet transmission data received by the reception data converter 526 is only the data destined for itself, all the packet transmission data is converted into ATM data and the own terminal 1
4 is the point that data is transmitted to the receiving data conversion unit 2 of the first embodiment.
Different from 6. Next, FIG. 14 shows a procedure in which each terminal 14 mutually performs data transmission via the wireless LAN terminal device 508 shown in FIG. Four wireless LAN terminal devices 508
Are represented by A, B, C and D. Here, B's wireless LA
Consider a case where the N terminal device 508 receives data from the other A, C, and D wireless LAN terminal devices 508. From the wireless LAN terminal device 508 of A to the wireless LAN terminal device 508 of B, the spread spectrum code P12 is used, and the wireless L of C is transmitted.
The spread spectrum code P13 is applied to the AN terminal device 508,
The signal is transmitted to the wireless LAN terminal device 508 of D by the common frequency channel after the spread spectrum modulation by the spread spectrum code P14. Similarly, the wireless LAN terminal device 5 of B
From 08, the spread spectrum code P21 is applied to the A wireless LAN terminal device 508, the spread spectrum code P23 is applied to the C wireless LAN terminal device 508, and the spread spectrum code P24 is applied to the D wireless LAN terminal device 508. After modulation, it is transmitted on a common frequency channel. Similarly, from the wireless LAN terminal device 508 of C to the wireless L of A
The spread spectrum code P31 is applied to the AN terminal device 508,
The spread spectrum code P32 is transmitted to the wireless LAN terminal device 508 of B, and the spread spectrum code P34 is transmitted to the wireless LAN terminal device 508 of D, after spread spectrum modulation, and transmitted on the common frequency channel. Similarly, D's wireless LAN
From the terminal device 508 to the wireless LAN terminal device 508 of A with the spread spectrum code P41, to the wireless LAN terminal device 508 of B with the spread spectrum code P42, and the wireless L of C.
The spread spectrum code P43 is applied to the AN terminal device 508,
After spread spectrum modulation, it is transmitted on a common frequency channel.

That is, the wireless LAN terminal devices 508 communicate with each other using the data which is spread spectrum modulated by 12 kinds of spread spectrum codes. Also, although not shown,
From the wireless LAN base station 6 to the four wireless LAN terminal devices 50
Eight more types of spread spectrum codes are prepared for transmission / reception to / from eight.

Here, the wireless LAN terminal device 508 of A
Is the wireless LAN terminal device 508 of B, the wireless LAN of C
Wireless LAN terminal device 508 addressed to terminal device 508 and D
The packet transmission data addressed to the spread spectrum code generators 530a to 530c and the spread spectrum modulator 5 are respectively transmitted.
32a to 532c, spread spectrum modulation is performed by the spread spectrum code corresponding to the combination of the self and the transmission destination, the combining unit 533 combines the signals, and then the wireless transmission unit 520 transmits the common frequency channel. Similarly, at substantially the same timing, the wireless LAN terminal device 508 of C is also used.
Is for the wireless LAN terminal device 508 of A, the wireless LAN of B
Wireless LAN terminal device 508 addressed to terminal device 508 and D
The packet transmission data addressed to each is spread-spectrum-modulated by the spread-spectrum code corresponding to the combination of the self and the destination, and then transmitted on the common frequency channel.
Further, at approximately the same timing, the wireless LAN terminal device 508 of D self-transmits the packet transmission data addressed to the wireless LAN terminal device 508 of A, the wireless LAN terminal device 508 of B, and the wireless LAN terminal device 508 of C, respectively. And the transmission destination are spread-spectrum-modulated by the spread-spectrum code corresponding to the combination, and then transmitted on the common frequency channel.

Here, in the wireless LAN terminal device 508 of B, the wireless receiving section 524 receives the packet transmission data from the other three wireless LAN terminal devices 508 on the common frequency channel. This reception data (packet transmission data) is then synchronized by the synchronization units 540a to 540c for spread spectrum demodulation corresponding to the combination of the self and the transmission source.
And three spread spectrum demodulators 550a-550c. As a result, only the data addressed to itself is transmitted to the reception data conversion unit 526. Therefore, the reception data converter 526 converts all the ATM data into the ATM data without distinguishing the header and transmits the ATM data.

Other A, C, D wireless LAN terminal devices 50
Similarly, packet transmission data is also received from the other wireless LAN terminal device 508, so that all of the packet transmission data received and subjected to spread spectrum demodulation are converted into ATM data. Output to 14.

The transmission of packet transmission data to the terminal 14 of another cell 10 via the wireless LAN base station 6 is performed by the AT.
Based on the header Ah of the M data, the spread spectrum modulator 532d processes it, and after synthesis, the wireless transmission unit 520
The wireless LAN base station 6 converts the received data after the spread spectrum demodulation into ATM data as it is and transmits the corresponding wireless LA via the node switch 4.
From the wireless LAN base station 6 of the cell 10 in which the N terminal device 508 exists, the spread spectrum modulation is performed by the spread spectrum code corresponding to the combination of the wireless LAN base station 6 and the wireless LAN terminal device 508 of the transmission destination, and then combined. And that cell 10
Is transmitted on a common frequency channel. That cell 10
The wireless LAN terminal device 508 corresponding to
After receiving from 24, spread spectrum demodulation corresponding to the combination of the self and the transmission source, the data is directly converted to ATM data and transmitted to the own terminal 14.

With the above-described configuration and operation, when performing direct inter-terminal communication in each cell 10, each wireless LAN terminal device 508 transmits data to any wireless LAN terminal device 508 at any time. However, the receiving side receives the packet transmission data transmitted from the plurality of wireless LAN terminal devices 508 on the common frequency channel, and then performs the spread spectrum demodulation according to the combination of the self and the transmission source. Even if the timings overlap, the data from each wireless LAN terminal device 508 can be separated and received from each wireless LAN terminal device 508 without collision. Further, since the packet transmission data obtained via the spread spectrum demodulators 550a to 550d is the data addressed to itself as it is, the packet transmission data is converted to ATM data and transmitted to the own terminal 14 without extraction processing. be able to.

Therefore, each wireless LAN terminal device 508
The packet transmission data can be arbitrarily transmitted to the receiving side at any time without causing a transmission failure even if the transmissions are duplicated and without waiting for the already performed communication. In this way, the wireless LAN terminal device 508 on the receiving side can obtain the packet transmission data at the same time, so that the processing can be performed early. Further, such a function is provided in each wireless LAN terminal device 508 by the transmission data conversion unit 522,
Spread spectrum code generation units 530a to 530d, spread spectrum modulators 532a to 532d, and wireless transmission unit 52.
0, the wireless reception unit 524, the synchronization units 540a to 540d, the spread spectrum demodulators 550a to 550d, and the reception data conversion unit 526 are provided, so communication control for multiple access is not necessary. It can be realized with a simple configuration.

In the present embodiment, spread spectrum code generators 530a to 530c and spread spectrum modulator 5 are used.
32a to 532c are spread spectrum modulation means, wireless transmission section 520 is wireless transmission means, wireless reception section 524 is wireless reception means, and synchronization sections 540a to 540c and spread spectrum demodulators 550a to 550c are spread spectrum demodulation means. Corresponds to.

[Others] In each of the above embodiments, the data transmission units 23, 123, 223, 323, 423, 523,
Data receiving units 27, 127, 227, 327, 427,
Although 527 and 527 are integrally formed, they may be separately formed.

In each of the above embodiments, the wireless LAN terminal devices 8, 108, 208, 308, 408, 508 are the terminal devices attached to the wireless local area network system, but they are attached to the wireless local area network system. Alternatively, a plurality of nodes may exist and wirelessly communicate with each other regardless of the node switch 4 and the wireless LAN base station 6.

In each of the above embodiments, the wireless LAN terminal devices 8, 108, 208, 308, 408 and 508 are connected to each other.
Direct communication was limited to within the same cell 10, but also between adjacent cells 10 or wireless LA.
N terminal device 8, 108, 208, 308, 408, 50
Even between cells 10 in a range where 8 can stably communicate, other wireless LAN terminal devices 8, 108, 208, 308, 408, existing in such a range in which direct communication is possible.
Similar to the direct communication within the same cell 10 described above, a function for performing frequency channel and spread spectrum modulation / demodulation processing is added to 508, so that direct communication between cells 10 can be enabled, and wireless LAN can be realized. Since the base station 6 and the node switch 4 are not burdened, the throughput is further improved.

[Brief description of drawings]

FIG. 1 is a diagram illustrating a configuration of a wireless local area network system that is an embodiment of the present invention.

FIG. 2 is a detailed explanatory diagram of a wireless local area network system.

FIG. 3 is a block diagram of a wireless LAN terminal device according to the first embodiment.

FIG. 4 is an explanatory diagram showing direct communication between the wireless LAN terminal devices.

FIG. 5 is a block diagram of a wireless LAN terminal device according to a second embodiment.

FIG. 6 is an explanatory diagram showing direct communication between the wireless LAN terminal devices.

FIG. 7 is a block diagram of a wireless LAN terminal device according to a third embodiment.

FIG. 8 is an explanatory diagram showing direct communication between the wireless LAN terminal devices.

FIG. 9 is a block diagram of a wireless LAN terminal device according to a fourth embodiment.

FIG. 10 is an explanatory diagram showing direct communication between the wireless LAN terminal devices.

FIG. 11 is a block diagram of a wireless LAN terminal device according to a fifth embodiment.

FIG. 12 is an explanatory diagram showing direct communication between the wireless LAN terminal devices.

FIG. 13 is a block diagram of a wireless LAN terminal device according to a sixth embodiment.

FIG. 14 is an explanatory diagram showing direct communication between the wireless LAN terminal devices.

[Explanation of symbols]

2 ... Wireless local area network system 4
... node switch 6 ... wireless LAN base station 8, 108, 208, 308, 408, 508 ... wireless L
AN terminal device 10 ... Cell 12, 40 ... Optical fiber 14 ... Terminal 20, 220a, 220b, 220c, 220d, 32
0a, 320b, 320c, 320d, 420, 520
... wireless transmission section 22, 222, 322, 422, 522 ... transmission data conversion section 23, 123, 223, 323, 423, 523 ... data transmission section 24, 24a, 24b, 24c, 24d, 224a, 2
24b, 224c, 224d, 324, 424a, 42
4b, 424c, 424d, 524 ... Wireless receiver 26, 226, 326, 426, 526 ... Data converter for reception 27, 127, 227, 327, 427, 527 ... Data receiver 28, 36 ... Optical transmitter 30, 38 ... Optical receiver 32 ... ATM network interface card
34 ... Internal buses 130, 330, 430a, 430b, 430c, 43
0d, 530a, 530b, 530c, 530d ... Spread spectrum code generation unit 132, 332a, 332b, 332c, 332d, 4
32a, 432b, 432c, 432d, 532a, 5
32b, 532c, 532d ... Spread spectrum modulator 140, 142, 144, 146, 340a, 340
b, 340c, 340d, 440, 540a, 540
b, 540c, 540d ... Synchronizing unit 150, 152, 154, 156, 350a, 350
b, 350c, 350d, 450a, 450b, 450
c, 450d, 550a, 550b, 550c, 550
d ... Spread spectrum demodulator 433, 533 ... Combining unit

Claims (9)

[Claims] 1. A wireless communication device capable of simultaneously communicating with a plurality of other wireless communication devices, wherein transmission data in which a destination address is added to data to be transmitted is transmitted on a frequency channel assigned to itself. Wireless transmission means, wireless reception means for receiving transmission data from each frequency channel assigned corresponding to the transmission source wireless communication device, and based on address information contained in the transmission data received by the wireless reception means. A wireless communication device comprising: a data extraction unit that extracts data addressed to itself. 2. A wireless communication device capable of simultaneously communicating with a plurality of other wireless communication devices, wherein transmission data obtained by adding a destination address to data to be transmitted is spectrum-spread by a spread spectrum code assigned to itself. Spread spectrum modulation means for spread modulation, wireless transmission means for transmitting transmission data spread spectrum modulated by the spread spectrum modulation means on a common frequency channel, and wireless reception means for receiving transmission data from the common frequency channel. Spread spectrum demodulation means for performing spread spectrum demodulation on the transmission data received by the wireless reception means in synchronization with each spread spectrum modulation code assigned corresponding to the source wireless communication device; and the spread spectrum demodulation means. Based on the address information included in the transmission data that was spread spectrum demodulated in There wireless communication apparatus comprising: the data extracting means for extracting the data addressed to, the by. 3. A wireless communication device capable of simultaneously communicating with a plurality of other wireless communication devices, wherein transmission data is assigned to each frequency channel assigned to a combination of the destination wireless communication device and itself. A wireless transmission means for transmitting each, and a wireless reception means for respectively receiving transmission data from each frequency channel assigned corresponding to the combination of the transmission source wireless communication device and self. Communication device. 4. A wireless communication device capable of simultaneously communicating with a plurality of other wireless communication devices, the spread spectrum modulating means for performing spread spectrum modulation of transmission data with a spread spectrum code assigned to the wireless communication device, the spread spectrum device. Radio transmission means for transmitting the transmission data that has been spread spectrum modulated by the modulation means on each frequency channel allocated corresponding to the destination wireless communication device, and transmitted from the frequency channel allocated corresponding to itself Radio receiving means for receiving data, and spread spectrum demodulation for performing spread spectrum demodulation on the transmission data received by the radio receiving means in synchronization with respective spread spectrum modulation codes assigned corresponding to the source wireless communication device. A wireless communication device comprising: 5. A wireless communication device capable of simultaneously communicating with a plurality of other wireless communication devices, wherein transmission data is spread spectrum modulated by respective spread spectrum codes assigned corresponding to the destination wireless communication device. Spread spectrum modulation means, wireless transmission means for synthesizing each transmission data spread spectrum modulated by the spread spectrum modulation means, and transmitting on a frequency channel assigned to itself, and assigned corresponding to the transmission source. Radio receiving means for receiving transmission data from each frequency channel, and spectrum for spread spectrum demodulating each transmission data received by the radio receiving means in synchronization with a spread spectrum modulation code assigned corresponding to itself. A wireless communication device comprising: spread demodulation means. 6. A wireless communication device capable of simultaneously communicating with a plurality of other wireless communication devices, wherein each of the spread spectrum codes is assigned to transmission data in correspondence with a combination of the destination wireless communication device and itself. And spread spectrum modulation means for spread spectrum modulation respectively, wireless transmission means for synthesizing each transmission data spread spectrum modulated by the spread spectrum modulation means and transmitting on a common frequency channel, transmission data from the common frequency channel And a transmission data received by the reception unit, in synchronization with each spread spectrum modulation code assigned corresponding to the combination of the transmission source wireless communication device and itself. A wireless communication device comprising: 7. A wireless local area network base station,
A wireless local area network terminal device, a node switch connected to the wireless local area network base station, and a terminal connected to the wireless local area network terminal device, wherein the wireless local area network system comprises: A wireless local area network system, wherein any one of the wireless communication devices is used as the wireless local area network terminal device. 8. The wireless communication device according to any one of claims 1 to 6 is capable of communicating with a plurality of other wireless communication devices in the same cell set for repeated use of a frequency channel. The wireless local area network system according to claim 7, wherein 9. The radio communication device according to claim 1, is assigned to a cell in a receivable position among other cells set for repeated use of a frequency channel. 8. The wireless local area network system according to claim 7, wherein the wireless local area network system is also capable of communicating with wireless communication devices in different cells because the frequency channel is also receivable.