JPH08125656A - Network communication system by radio communication - Google Patents

Abstract

PURPOSE: To realize an environment where plural groups make simultaneous network communication through different radio channels. CONSTITUTION: A host terminal sends a transfer packet subjected to diffusion processing by a selection code (S11). Other membership terminal equipment belonging to the same group applies inverse diffusion to a received packet by a full diffusion code prepared in the system (S12). A signal level after inverse diffusion is received by a computer main body, signal levels are compared (S13) and a code with a highest level is recognized to be a selection code in the group (S14). A diffusion signal generator is controlled so as to apply the selection code to a transceiver. In this case, since a signal level of a transfer packet after inverse diffusion is a problem, optional data are enough for the packet. However, the membership terminal equipment applies inverse diffusion to the transfer packet signal by using a full diffusion code prepared in the system, the signal level after the inverse diffusion processing is received by the computer main body and the signal is kept to be sent for a time enough to compare signal levels.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a network communication system by wireless communication, and more particularly to a wireless system which realizes an environment in which a plurality of groups can simultaneously perform network communication on different wireless channels. For example, it is applied to indoor wireless communication and mobile communication.

[0002]

2. Description of the Related Art As a known document describing a conventional network communication system, for example, Japanese Patent Laid-Open No. 6-2998 is known.
There is publication No. 1. The one disclosed in this publication is a local area network that receives a signal on a wireless transmission channel, including a receiving device that receives the signal and a transmitting device that transmits the signal, and the receiving device receives the signal via the transmitting channel. A high LAN (Local Area Network) by including a reception level determination device that represents a signal level, a threshold level circuit device that provides a level instruction signal, and a transmission control device that controls the operation of the transmission device based on the level instruction signal. ) It tries to realize performance.

Further, Japanese Patent Application Laid-Open No. 5-260051 discloses that in a network composed of a plurality of wireless terminals and a central station capable of transmitting and receiving with all of them, all available frequency bands are used for message channels, channel tone upstream, By dividing the channel tone into three, the central station has a role of a repeater, and a wireless system that facilitates transmission and reception between terminals is provided.

[0004]

According to the above-mentioned publication, the targeted wireless local area network (LAN) is a wired LAN that is widely used at present and is used for connection between terminals. It is intended to replace the cable with a wireless link. In addition, JP-A-6-29
The wireless LAN described in Japanese Patent Publication No. 961 is an Ethernet access method (C which is the most widely used wired LAN at present).
It is an evenly distributed wireless LAN in which one wireless channel is shared by all terminals using SMA). In addition, Japanese Patent Laid-Open No. 5-2
The wireless LAN described in Japanese Patent No. 60051 is a wireless LAN that controls a wireless channel by providing a central station in addition to a wireless terminal in order to improve communication throughput, and takes a communication form via the central station. Both of them aim to wirelessly realize the usage form of the currently used wired LAN, and assume network communication in a closed environment such as in an office.

However, considering that the number of notebook personal computers (PCs) has increased in recent years and that notebook-sized computers called personal digital assistants have begun to be used, a plurality of these users can use these portable computers. It is considered that an environment (mobile network) is needed in which users can bring their own computers and configure networks to communicate with each other regardless of where they are. This mobile network environment realizes, for example, a paperless meeting regardless of whereabouts inside or outside the office.

In this mobile network, it is considered that there are many environments in which a plurality of groups of users are adjacently used, and the communication mode is such that meetings are frequently exchanged with real-time data. More and more traffic. Therefore, in a wireless LAN in which all terminals share one wireless channel as in Japanese Patent Laid-Open No. 6-29961, there is a problem that throughput is obviously lowered. In addition, JP-A-5
In the wireless LAN disclosed in Japanese Patent No. 260051, a repeater called a central station is required, so there is a local limitation that the network can be configured only at the place where the central station is installed.

The present invention has been made in view of the above circumstances, and a plurality of radio channels with extremely small interference are prepared, and one radio channel is arbitrarily selected by a group desired to configure the network when the network is configured. In order to provide an environment in which a plurality of groups can simultaneously perform network communication on different wireless channels, a network communication method by wireless communication having a method of transmitting a selected channel to each terminal in a required group is provided. The purpose is to

[0008]

In order to achieve the above-mentioned object, the present invention provides (1) a plurality of groups arbitrarily configured by a plurality of wireless terminals, in which the wireless terminals belonging to each group are of equal distribution type. A wireless network that performs network communication, and when an arbitrary group performs network communication, one of the wireless terminals belonging to the group becomes a host terminal and the remaining other wireless terminals become member terminals, and other groups Sense the communication channel in use to determine an empty channel, select it as the communication channel to be used in the group, and then notify the selected communication channel to at least the member terminals belonging to the same group, and the member terminal uses it in the group. After confirming the communication channel to be used, the peer-to-peer distributed network communication is performed using the communication channel. In the network communication method by wireless communication configured to start, the communication channels used in each group are code-division-multiplexed by the individual spreading code for each group, and the communication in the same group is performed by the individual spreading code. A communication system which senses the presence or absence of a spread spectrum spread signal and transmits when it does not detect the spread signal, wherein the host terminal spreads and transmits a transmission packet with a selected code, and a member terminal belonging to the same group Despreads the transmitted packet with all spreading codes available in the system, and recognizes the spreading code with the highest signal level after despreading as the selection code of its own group, and (2) the host terminal: After spreading the transmission packet with the selected code and sending it, the communication participation announcement Ack packet arrives with the selection code. Waiting for the arrival and an announcement of communication participation from member terminals belonging to the same group A
Immediately after receiving the ck packet, a confirmation packet spread with the selection code is sent out, and the member terminals belonging to the same group despread the received packet with all spreading codes available in the system, and the signal level after despreading The spreading codes are sorted in ascending order, the spreading code is selected in the sorted order, the communication participation expression Ack packet including the ID unique to the member terminal is spread and transmitted by the same code, and the arrival of the confirmation packet is waited by the same code. Then, after waiting for a predetermined time, when the confirmation packet is not received, the code is selected in the sorted order and the above procedure is performed, and after the confirmation packet is received, the same code is confirmed as the selection code, and the host terminals are at least in the same group. Each member of the group using the selected code after receiving the communication participation expression Ack packet from all member terminals belonging to Multicast communication or broadcast communication by means of spread spectrum, or (3) wireless in which a plurality of groups arbitrarily configured by a plurality of wireless terminals perform peer-to-peer distributed network communication among wireless terminals belonging to each group In a network, when an arbitrary group performs network communication, one of the wireless terminals belonging to the group becomes a host terminal, and the remaining other wireless terminals become member terminals, so that the communication channels being used by another group can be changed. After sensing and determining an empty channel and selecting it as a communication channel to be used in the group, at least notifying the selected communication channel to the member terminals belonging to the same group, and confirming the communication channel used by the member terminal in the group , Using the communication channel In a network communication method by wireless communication configured to start distributed network communication, communication channels used in each group are code-division-multiplexed with individual spreading codes for each group, and communication within the same group is It is a communication system that senses the presence or absence of a spread spectrum signal spread by a separate spread code, and transmits when the spread signal is not detected. The host terminal spreads and transmits a transmission packet with a selected code, and the same The member terminals belonging to the group despread the received packet with all spreading codes available in the system and then demodulate, and recognize the spreading code used to obtain the demodulated signal including the transmission packet as the selection code of the own group. And even,
(4) In (3), the transfer packet includes data unique to a group, and (5) In (3), the transfer packet includes data common to the network. (6) In (3) above, in the order of the code having a higher signal level after the despreading,
Demodulating the signal after despreading, and (7) in (3) above, the host terminal waits for the arrival of the communication participation expression Ack packet with the selection code after transmitting the transmission packet, and the same group. Immediately after receiving the communication participation expression Ack packet from the member terminals belonging to the member, the confirmation packet is immediately spread and transmitted to the member with the same code, and the communication participation expression Ack packet is not received from all the member terminals within a predetermined time. At this time, the transmission packet is diffused and transmitted by the selection code, the above procedure is performed, and the member terminals belonging to the same group recognize the selection code, and then the communication participation expression Ack packet including the ID unique to the member terminal by the recognized selection code. Is transmitted after being transmitted, and the reception code is put in a waiting state with the same code. After receiving the transmission packet, the selection code is recognized again by the communication method according to claim 3. After performing the above procedure and receiving the confirmation packet, the same code is confirmed as the selection code, and the host terminal receives the communication participation expression Ack packet from all member terminals belonging to the same group, and then uses the selection code to check the group To perform multicast or broadcast communication by spread spectrum to each member,
Alternatively, (8) when a plurality of groups arbitrarily configured by a plurality of wireless terminals are wireless networks in which wireless terminals belonging to the respective groups perform equal distributed network communication, and when any group performs network communication , One of the wireless terminals belonging to the group becomes a host terminal, and the other remaining wireless terminals become member terminals, senses a communication channel being used in another group, determines an empty channel, and After selecting it as the communication channel to use, at least inform the member terminals belonging to the same group of the selected communication channel,
After confirming the communication channel used by the other member terminals in the group, in the network communication method by wireless communication configured to start the peer-to-peer distributed network communication using the communication channel, the communication channel used in each group is Each group is code division multiplexed with an individual spreading code, and communication within the same group is
A communication system which senses the presence or absence of a spread spectrum signal spread by the individual spread code, and transmits when the spread signal is not detected, wherein a pilot code which is a spread code for communication channel control common to the system is provided, The host terminal spreads a transmission packet including at least data related to its own group ID and selection code with the pilot code and sends it out, and member terminals belonging to the same group receive the transmission packet, despread with the pilot code and demodulate. Then, the selection code of its own group is recognized, and further, (9) in (8), the host terminal waits for the arrival of the communication participation expression Ack packet by the pilot code after transmitting the transmission packet, and the same. After receiving the communication participation announcement Ack packets from all the member terminals belonging to the group, the demodulation is performed and the Ack packet is demodulated. If the code included in the packet and the selection code do not match, the transmission packet is sent to the member by spreading the pilot code to the member, the procedure is performed, and when the two match, the pilot code is immediately sent to the member. After the packet is spread and transmitted, the member terminals belonging to the same group, after recognizing the selection code, include the ID unique to the member terminal by the pilot code and the communication participation expression Ack including the data about the recognized spreading code type.
The packet is spread and transmitted, the pilot code enters the communication waiting state, and after the transmission packet is received, the selection code is recognized again by the communication method according to claim 8, and the procedure is performed,
After receiving the confirmation packet, the host waits for the communication to start with the selection code, and the host terminal receives the communication participation expression Ack packet from all the member terminals belonging to the same group, and then uses the selection code to address each member of the group. In a wireless network in which multicast communication or broadcast communication by spread spectrum is performed, or (10) a plurality of groups arbitrarily configured by a plurality of wireless terminals perform peer-to-peer distributed network communication among wireless terminals belonging to each group. Therefore, when an arbitrary group performs network communication, one of the wireless terminals belonging to the group becomes a host terminal, and the remaining other wireless terminals become member terminals, so that the communication channels being used by other groups can be changed. Sense the available channels to determine the communication channel used by the group. After selecting the channel, at least the member terminals belonging to the same group are notified of the selected communication channel, and after confirming the communication channel used by the member terminal, the peer-to-peer distributed network communication is started using the communication channel. In the network communication method by wireless communication configured as described above, the communication channels used in each group are code-division-multiplexed by the individual spreading code for each group, and the communication within the same group is spread spectrum by the individual spreading code. A communication system that senses the presence / absence of a spread signal that has been transmitted, and transmits when it does not detect the spread signal. After selecting a code, the host terminal waits for the arrival of a communication participation expression Ack packet with the selection code and joins the same group. After receiving the communication participation expression Ack packet from the member terminal to which it belongs Immediately, the confirmation packet is spread by the selection code and transmitted, while the member terminal spreads the communication participation expression Ack packet including the ID unique to the member terminal by using one of the spreading codes available in the system. When the confirmation packet is sent out, waits for the arrival of the confirmation packet with the same code, and if the confirmation packet is not received after the lapse of a predetermined time, the spreading code is changed and the above procedure is performed. Recognizing, (11) In (10), when the member terminal changes the selection code, the spreading code is randomly selected and changed, and (12) (6), ( In 9) or (10), after the host terminal receives a communication participation expression Ack packet from a member terminal of a different group, a group existing in the system. And group ID of the flop, in which is characterized in that sending by diffusing packets containing data about selection code corresponding to the group ID setting code.

[0009]

According to the network communication method by wireless communication of the present invention having the above-mentioned configuration, a plurality of groups arbitrarily configured by a plurality of wireless terminals carry out a peer-to-peer distributed network communication among wireless terminals belonging to each group. When any group performs network communication, one of the wireless terminals belonging to the group becomes a host terminal, and the remaining other wireless terminals become member terminals, and communication channels being used by another group. To determine an available channel, select the communication channel to be used in the group, and then notify the selected communication channel to at least the member terminals belonging to the same group, and confirm the communication channel used by the member terminal in the group. Later, a peer-to-peer distributed network communication will be performed using the communication channel. In the network communication system by wireless communication configured to start, (1) the communication channels used in each group are code-division-multiplexed with individual spreading codes for each group, and communication within the same group A communication system that senses the presence or absence of a spread spectrum signal spread by a spread code, and transmits when the spread signal is not detected.The host terminal spreads and transmits a transmission packet with a selected code, and sends it to the same group. The member terminals that belong to the group use a selection code that despreads the transmitted packet with all spreading codes available in the system and recognizes the spreading code with the highest signal level after despreading as the selection code of its own group. It is possible to provide a channel transmission method to members. (2) The host terminal spreads and transmits the transmission packet with the selected code, waits for the arrival of the communication participation expression Ack packet with the selection code, and receives the communication participation expression Ack packet from the member terminals belonging to the same group. Immediately afterwards, a confirmation packet spread with the selection code is sent out, and the member terminals belonging to the same group despread the received packet with all spreading codes available in the system, and the spreading code in descending order of the signal level after despreading. , The spreading code is selected in the sorted order, the communication participation expression Ack packet including the ID unique to the member terminal is spread and transmitted by the same code, and the arrival of the confirmation packet is waited by the same code for a predetermined time. After receiving the confirmation packet, after waiting, when the confirmation packet is not received, select the code in the sorted order and perform the above procedure. And the selection and confirmation code the same code,
Since the host terminal receives the communication participation expression Ack packet from at least all the member terminals belonging to the same group, it performs the spread spectrum multicast communication or the broadcast communication to each member of the group using the selected code. It is possible to provide a method of confirming the selection code for preventing erroneous recognition of. (3) The communication channels used in each group are code-division-multiplexed with the individual spreading code for each group, and the communication within the same group senses the presence or absence of the spread signal spread by the individual spreading code. , A communication system which transmits when the spread signal is not detected, the host terminal spreads and transmits a transmission packet with a selected code, and member terminals belonging to the same group all receive packets available in the system. Despread with a spreading code and then demodulate, and recognize the spreading code used to obtain the demodulated signal containing the transmission packet as the selection code of the own group. Can be provided. (4) Since the transmission packet includes data unique to the group, the group members only need to know the data common to the network in transmitting the selection code, and the group between arbitrary member terminals of the network can be Easy to configure. (5) Since the transfer packet contains data common to the network, the selection code can be correctly recognized even when the host terminals of a plurality of groups are sending the transfer packet to transfer the selection code almost at the same time. (6) In the order of the code having the higher signal level after the despreading,
Since the signal after despreading is demodulated, the time required for recognition of the selected code can be shortened. (7) The host terminal waits for the arrival of the communication participation expression Ack packet with the selection code after transmitting the transmission packet, and immediately after receiving the communication participation expression Ack packet from the member terminals belonging to the same group, the member immediately When the confirmation packet is transmitted with the same code to the destination, and the communication participation expression Ack packet from all member terminals is not received within a predetermined time, the transmission packet is transmitted with the selection code and transmitted, and the above procedure is performed. After the selection code is recognized, the member terminals belonging to the same group spread the communication participation expression Ack packet including the unique ID to the member terminal with the recognized selection code and send it out. After that, the selection code is recognized again by the communication method according to claim 3, the procedure is performed, and after receiving the confirmation packet, the selection code is selected. Selection code that the host terminal receives the communication participation expression Ack packet from all the member terminals belonging to the same group, and then uses the selection code to perform multicast or broadcast communication by spectrum spread to each member of the group. It is possible to provide a method of confirming selection code transmission using the. (8) The communication channels used in each group are code-division-multiplexed with the individual spreading code for each group, and the communication within the same group senses the presence or absence of the spread signal spread by the individual spreading code. In a communication system that transmits when the spread signal is not detected, a pilot code that is a spread code for communication channel control common to the system is provided, and the host terminal transmits a transfer packet including at least data related to its own group ID and selection code. Member terminals belonging to the same group receive the transmitted packet after spreading with a pilot code, and despread with a pilot code to demodulate it to use the pilot code to recognize the selection code of the own group. It is possible to provide a channel transmission method to existing group members. (9) The host terminal, after transmitting the transmission packet, waits for the arrival of the communication participation expression Ack packet with the pilot code,
After receiving the communication participation expression Ack packets from all the member terminals belonging to the same group, demodulating and collating the code included in the Ack packet with the selection code, and when they do not match, the transmission packet is spread to the members with the pilot code. When sending, performing the above procedure, and when they match, immediately send a confirmation packet to the member with a pilot code spread and send.Member terminals belonging to the same group recognize the selection code and then use the pilot code to uniquely identify the member terminal. I
The communication participation expression Ack packet including D and the data related to the type of the recognized spreading code is spread and transmitted, and the pilot code enters the communication waiting state. After the transmission packet is received, the selection code is again selected by the communication method described in (8) above. After receiving the confirmation packet and waiting for the communication start with the selection code, the host terminal receives the communication participation expression Ack packet from all the member terminals belonging to the same group, and then selects the selection code. A method for confirming selection code transmission using a pilot code for performing multicast communication or broadcast communication by spread spectrum is provided to each member of the group. (10) The communication channels used in each group are code-division-multiplexed with respective spreading codes for each group,
Communication within the same group is a communication system that senses the presence or absence of a spread signal spread spectrum by the individual spreading code, and transmits when the spread signal is not detected,
After selecting the code, the host terminal waits for the arrival of the communication participation expression Ack packet with the selection code, and immediately after receiving the communication participation expression Ack packet from the member terminals belonging to the same group, immediately transmits the confirmation packet by spreading with the selection code. On the other hand, the member terminal spreads and sends the communication participation expression Ack packet containing the ID unique to the member terminal by using one of the spreading codes available in the system, and sends the confirmation packet by the same code. Group that uses a selection code that waits for a predetermined time and when the confirmation packet is not received, changes the spreading code and performs the above procedure to recognize the received code as the selection code after receiving the confirmation packet Provide a method of channel transmission to members. (11) Since the spreading code is randomly selected and changed when the member terminal changes the selection code, it is possible to prevent a decrease in throughput in other groups. (12) After the host terminal receives a communication participation expression Ack packet from a member terminal of a different group, the group ID of the group existing in the system and the group ID
Since the packet including the data related to the selection code corresponding to is spread and transmitted by the setting code, the time required for the member terminal to recognize the selection code is shortened.

[0010]

Embodiments will be described below with reference to the drawings. FIG. 1 is a block diagram for explaining an embodiment of a network communication system by wireless communication according to the present invention, which is a block diagram of a mobile network. 1a to 1 in the figure
d, 2a to 2d are wireless terminals, 3 is a wireless channel A, and 4 is a wireless channel B. The mobile network is a communication system that forms a peer-to-peer distributed network at any place by bringing wireless terminals. In the example of FIG. 1, there are two groups (group 1 and group 2) forming a mobile network, and wireless terminals in each group communicate with each other. The two groups use different radio channels A and B for transmitting data packets.

The radio channels are subject to small mutual interference (small correlation), but the system according to the present invention assigns spread codes with low correlation to each radio channel, and the radio channels are code division multiplexed. System. In this case, when starting communication in each group,
It is necessary to select one spreading code in a group from the prepared spreading codes. One of the wireless terminals in the group selects a spreading code to be used in the group as a host terminal, and transmits the selected code to other group member terminals.

FIG. 2 is a flowchart showing a communication procedure at the start of network communication. Hereinafter, each step (S) will be described in order. First, the host terminal detects the spreading code of the wireless channel being used (S1), and the host terminal selects the spreading code used in the group (S1).
2). Next, the information of the selected spreading code is transmitted to the terminal of the group member (transmission of the selection code) (S3), and the spreading code used between the host terminal and the member terminal is confirmed (confirmation of the selection code) (S4). ). Next, the selected spreading code is shared by the group members and network communication is started (S5). The wireless terminal to be the host terminal may be any wireless terminal in the group, and the remaining wireless terminals are called member terminals.

As described above, the procedure until the start of communication is as follows: "Selection of spreading code by host terminal" (S2), "Transmission of selection code by host terminal" (S3), "Confirmation of selection code at member terminal" ( S4) is divided into. The present invention
Among the above procedures, the method of "transmitting the selection code by the host terminal" and "confirming the selection code of the member terminal" is proposed. The host terminal checks the empty code and selects the code to be used in the group. .

FIG. 3 is a diagram showing a configuration example of a wireless terminal for implementing the present invention. In the figure, 11 is a spread code generator,
12 is a correlation detector, 13 is a channel controller, 14
Is a computer main body, 15 is a network controller, 16 is a transceiver, and 17 is an antenna.

The wireless terminal includes a transceiver 16 for spreading and despreading with a spreading code, modulation / demodulation of a data packet, transmission / reception of a carrier, a spreading code generator 11 for supplying a selective spreading code to the transceiver 16, and the transceiver. 16 comprises a network controller 15 which mediates transmission / reception data between the computer 16 and the computer main body 14 and controls the evenly distributed network communication, and outputs a selected spreading code, a spreading code used by the transceiver 16 and a channel controller 13 which controls transmission / reception thereof.

FIGS. 4A to 4G show an example of the structure of a data packet used in the present invention. The packet includes a header having information such as a preamble, a code for classifying the data, and an end delimiter indicating the end of the data and the packet.

Next, the invention according to claim 1 will be described. 5A and 5B are flowcharts for explaining the operation of the network communication system by wireless communication according to the present invention. 5A is a host terminal, and FIG.
(B) is a member terminal. The host terminal spreads the transmission packet with the selection code and sends it (S11). Other member terminals belonging to the same group despread the received packet with all spreading codes prepared in the system (S1
2). The signal level after despreading is taken into the computer, the signal levels are compared (S13), and the code with the highest level is recognized as the selected code in the group (S1).
Four). The spread signal generator is controlled so that this selection code is supplied to the transceiver. At this time, the transmission packet may be any data because the signal level after despreading becomes a problem. However, the transmitted packet signal is despread by the member terminals with all spreading codes prepared in the system, the signal level after despreading is taken into the computer main body, and it is sent out only for a sufficient time for comparison of the signal levels. to continue.

Next, the invention described in claim 2 will be described. 6 and 7 are flowcharts for explaining another embodiment of the network communication system by wireless communication according to the present invention. 6 is a host terminal, and FIG. 7 is a member terminal. In the above-mentioned claim 1, the member terminal despreads the transfer packet signal spread by the selection code sent from the host terminal with all spreading codes prepared in the system, compares the signal levels, and compares the signal levels. This is a method of transmitting a selection code in which a high code is recognized as a selection code. However, since the selection code is unilaterally transmitted from the host terminal to the member terminals, it is not recognized whether all the member terminals of the group correctly recognize the selection code. In particular, when the host terminals of a plurality of groups transmit the transmission packet signals almost at the same time, the selection codes of different groups may be erroneously recognized as the selection codes of the own group. The present invention provides a method of confirming a selection code to prevent erroneous recognition of the selection code.

The host terminal, after spreading and transmitting the transmission packet with the selection code (S21), enters the reception mode with the selection code and waits for the arrival of the communication participation expression Ack packet (S22). On the other hand, the member terminals belonging to the same group despread the received packets with all spreading codes prepared by the system, and sort the codes in descending order of the signal level (PN [1], PN [2], …, PN [m]) (S3
2) Select the spreading code in the sorted order, and spread the communication participation expression Ack packet with that code and send it (S3
Four). The communication participation announcement Ack packet is, for example, as shown in FIG.
As shown in (d), it is composed of data including an ID unique to each member terminal. After transmitting the Ack packet, the member terminal enters the reception mode with the same code and waits for the arrival of the confirmation packet (S35).

The host terminal despreads the received packet with the selection code and then demodulates it (S23). If the received packet is a communication participation expression Ack packet (S24), the ID unique to the member terminal included in the packet. Is compared with the personal ID of the member terminal of the own group. If the Ack packet is from a member terminal belonging to the same group, a confirmation packet is spread and transmitted to the member with a selection code (S25). As an example of the structure of the confirmation packet, as shown in FIG. 4E, it is composed of data including the group ID.

The member terminal despreads the received packet with the selected code, fetches the despread data into the computer body, and verifies from the group ID contained in the packet whether the packet is a confirmation packet from the host terminal of the same group. Yes (S37). When the member terminal receives the confirmation packet from the host terminals of the same group within a predetermined time, the member terminal confirms the code as the selection code (S39). On the other hand, if the confirmation packet is not received after waiting for a predetermined time, the code is switched in the sorted order (S38), and the above procedure is repeated until the confirmation packet is received.

After confirming the reception of the communication participation expression Ack packet from all the member terminals belonging to the same group (S24), the host terminal, in the case of multicast communication,
The host terminal broadcasts the personal ID list of the member terminals of the group and informs the members of the group to perform network communication by multicast. In the case of broadcast communication, communication is started without this procedure.
When the host terminal cannot receive the communication participation expression Ack packet from all the member terminals within the predetermined time, the host terminal again transmits the transmission packet with the selection code (S21), and performs the above procedure.

Next, the invention described in claim 3 will be described. According to a first aspect of the present invention, a member terminal despreads a transmission packet signal spread by a selection code with a spreading code prepared by the system, compares the signal levels after despreading, and compares the signal levels. This is the selection code transmission method that recognizes the highest code as the selection code.Since the selection code is transmitted unilaterally from the host terminal to the member terminals, it is possible to recognize whether all the member terminals of the group have correctly recognized the selection code. Has not been done. In particular, when the host terminals of a plurality of groups send the transmission packet signals almost at the same time, the selection codes of different groups may be erroneously recognized as the selection code of the own group. A method of confirming a proper selection code is required. If there are multiple groups and the signal levels after despreading are almost the same, the host terminal and member terminals will exchange information for confirmation. It takes time to transmit and verify the code.

The present invention is intended to shorten the time required for transmitting and confirming the selection code in claims 1 and 2. 5A shows the communication procedure of the host terminal, and FIG. 8 shows the communication procedure of the member terminal. The host terminal spreads the transmission packet with the selection code and sends it. Other member terminals belonging to the same group despread the received packet with all spreading codes prepared in the system and then demodulate (S41, 42), import the demodulated signal into the computer main body,
It is checked whether the demodulated signal includes a transmission packet (S43, 44). As a result of the collation, the spread code obtained from the demodulated signal including the transmission packet is recognized as the selection code (S4
5) Control the spreading signal generator so that the selection code is supplied to the transceiver.

Next, the invention described in claim 4 will be described. FIG. 4 shows a configuration example of a transmission packet used in the present invention.
(F). The transfer packet contains data common to the system. In this case, the group members need only know the data common to the network in transmitting the selection code, and it is easy to form a group of arbitrary member terminals of the network.

Next, the invention described in claim 5 will be described. FIG. 4 shows a configuration example of a transmission packet used in the present invention.
It shows in (e). The transfer packet contains data specific to the group. In this case, the member terminal recognizes the selection code depending on whether or not the demodulated signal includes its own group ID. Therefore, when the host terminals of a plurality of groups send the transmission packet almost at the same time to transmit the selection code. Even in, the selection code can be correctly recognized. However, the group ID must be the group ID of your group in advance.
Need to get.

Next, the invention according to claim 6 will be described. Claim 6 describes a communication procedure in which the host terminal uses the selection code to confirm whether the member terminal has recognized the selection code. 9 and 10 are flowcharts for explaining still another embodiment of the network communication system by wireless communication according to the present invention. 9 is a host terminal, and FIG. 10 is a member terminal.

After transmitting the transmission packet by the method described in claim 3 (S51), the host terminal waits for the arrival of the communication participation expression Ack packet with the selection code (S52). The member terminals belonging to the same group, after recognizing the selection code by the method described in claim 3 (S61), send the communication participation expression Ack packet spread by the selection code (S62). The communication participation expression Ack packet is composed of data including the individual IDs of the member terminals as shown in FIG. 4D, for example.

The host terminal demodulates the communication participation expression Ack packet (S53), compares the personal ID of the member terminal included in the packet with the ID of the self-group member terminal obtained in advance (S54), If it matches the personal ID, the confirmation packet is spread with the selection code and transmitted (S55). The confirmation packet is composed of data including the individual IDs of the member terminals (FIG. 4D), like the communication participation expression Ack packet, for example.

The member terminal which receives the confirmation packet from the host terminal of its own group within the predetermined time recognizes the same code as the selection code (S61). On the other hand, the member terminal which does not receive the confirmation packet after the elapse of the predetermined time, recognizes the selection code again in the communication procedure described in claim 3 (S61), and performs the procedure. After the lapse of a predetermined time, the host terminal announces that all member terminals belonging to the same group will participate in communication Ack.
When no packet is received (S56), the method according to claim 3
The transmission packet is transmitted again by the communication procedure described in (1), the above procedure is performed, and after confirming that the communication participation expression Ack packet has been received from all the member terminals belonging to the same group, the broadcast communication is started. Further, in the case of multicast communication, the host terminal broadcasts the personal ID list of the member terminals of the group with a selection code and informs the members to perform network communication by multicast.

Next, the invention according to claim 7 will be described. FIG. 11 is a diagram showing a configuration example of a wireless terminal for implementing the present invention. In the figure, 21-1 to 21-n are spread code generators, 22-1 to 22-n are correlation detection units, and 23. Is a channel controller, 24 is a computer main body, 25 is a network controller, 26 is a transceiver, and 27 is an antenna.

The wireless terminal shown in FIG. 11 can simultaneously perform correlation detection on all codes prepared in the system. FIG. 12 shows the communication procedure of the member terminal. Other member terminals belonging to the same group simultaneously despread the transmitted packet signal with all spreading codes prepared in the system (S7
1). After the despread signal level of each code is taken into the channel controller 23 or the computer main body 24, the despread signal levels are compared and the spread codes are sorted in descending order of signal level (PN [1], PN [ 2], ...,
PN [m]) (S72), the signal after despreading is demodulated in this code order (S74), and it is checked whether the demodulated signal includes a transmission packet (S75, 76). By comparing the demodulated signals in descending order of signal level, the time required to recognize the selection code can be shortened.

Next, the invention described in claim 8 will be described. The present invention describes a communication procedure in which a spreading code (pilot code) for controlling a communication channel common to the system is provided and this is used for transmitting a selection code. FIGS. 13A and 13B are flowcharts for explaining still another embodiment of the network communication system by wireless communication according to the present invention.

The host terminal spreads the transmission packet with the pilot code and sends it (S81). The transmission packet has at least its own group ID as shown in FIG.
And selection code data. After transmitting the transfer packet, the spread signal generator is controlled so that the selection code is supplied to the transceiver (S82). Member terminals belonging to the same group wait for the arrival of the transmission packet with the pilot code (S83), despread the received packet with the pilot code, and then demodulate (S84). Further, the demodulated signal is taken into the computer main body, and the group ID included in the demodulated signal is compared with the own group ID (S8
5) The type of spreading code corresponding to the own group ID is recognized as the selection code used in the group (S86).
After this, the member terminal controls the spreading signal generator so that the selection code is supplied to the transceiver in the same manner as the host terminal. On the other hand, if the received packet does not include its own group ID, the pilot code is awaited again for the arrival of the transmission packet, and the above procedure is repeated.

Next, the invention according to claim 9 will be described. According to the present invention, in claim 8, the host terminal confirms whether the member terminal recognizes the selection code by using this pilot code, and the member terminal correctly recognizes the selection code by the confirmation packet from the host terminal. The confirmation procedure is added.

14 and 15 are flowcharts for explaining still another embodiment of the network communication system by wireless communication according to the present invention. 14 is a host terminal, and FIG. 15 is a member terminal. After transmitting the transmission packet by the method described in claim 8 (S91), the host terminal waits for the arrival of the communication participation expression Ack packet by the pilot code (S92). Member terminals belonging to the same group, after recognizing the selection code by the method described in claim 8 (S101), spread the communication participation expression Ack packet by the pilot code and send it (S102). The communication participation expression Ack packet is composed of data including the spreading code recognized as the individual ID of the member terminal, as shown in FIG. After transmitting the communication participation announcement Ack packet (S102), the member terminal waits for the arrival of the confirmation packet with the pilot code (S103).

The host terminal demodulates the communication participation expression Ack packet (S93), compares the personal ID of the member terminal included in the packet with the ID of the self-group member terminal obtained in advance (S94), and if they match, , The member terminal correctly verifies the code based on the code information contained in the packet at the same time. Furthermore, the host terminal, after confirming that the member terminal correctly recognizes the selection code, immediately spreads the confirmation packet to the member with the pilot code and sends it out. The confirmation packet is composed of data (FIG. 4 (g)) including the spreading code recognized as the individual ID of the member terminal, like the communication participation expression Ack packet, for example.

On the other hand, when the own group member terminal recognizes a different code as the selection code, the transmission packet is spread with the pilot code and transmitted instead of the confirmation packet. The member terminal controls the spread signal generator so that the selection code is supplied to the transceiver after receiving the confirmation packet from the own group host terminal within a predetermined time. On the other hand, when the confirmation packet is not received after the elapse of the predetermined time, the selection code is recognized again by the communication procedure described in claim 8 and the procedure is performed.

When the host terminal does not receive the communication participation expression Ack packet from all the member terminals belonging to the same group (S96), it transmits the transfer packet again by the communication procedure described in claim 8 (S91), After confirming that the communication participation expression Ack packet in which the code is correctly selected is received from all the member terminals belonging to the same group (S9
6) Switch to the selection code by the control signal and start broadcast communication (S97). Further, in the case of multicast communication, the host terminal broadcasts the personal ID list of the member terminals of the group with a selection code and informs the members to perform network communication by multicast.

Next, the invention according to claim 10 will be described. 16 and 17 are flowcharts for explaining still another embodiment of the network communication system by wireless communication according to the present invention. 16 shows the communication procedure of the host terminal, and FIG. 17 shows the communication procedure of the member terminal.

The host terminal senses an empty channel and selects a code to be used in the group (S111), and then uses the same setting code to indicate communication participation A from the same group member.
Wait for arrival of ck packet (S112). On the other hand, the member terminal selects one of the spreading codes that can be used in the system, spreads the communication participation expression Ack packet with the same code (setting code), and sends it (S122), and uses the same code to confirm the arrival of the confirmation packet. Wait (S123). The data structure of the communication participation expression Ack packet includes a personal ID unique to each terminal, as shown in FIG.

The host terminal despreads the received packet with the selection code and demodulates it to capture the demodulated signal in the computer body (S113), and collates the personal ID of the member terminal included in the demodulated signal with the personal ID of the own group member terminal. (S1
14) If they match, a confirmation packet is immediately spread with the selection code and sent to the member (S115). The confirmation packet is composed of its own group ID and selection code information, for example, as shown in FIG. When the member terminal receives this confirmation packet within the predetermined time (S124), it recognizes the setting code as the selection code (S12).
Five). If the confirmation packet is not received after the lapse of a predetermined time, the setting code is changed by the control signal and the above procedure is repeated.

Next, the invention according to claim 11 will be described. In the tenth aspect, when the member terminal sends the communication participation expression Ack packet with the selection code of the other group, it interrupts the communication of the other group, so that the communication within the group is temporarily interrupted. At this time, if the code selection order of each member terminal is the same, when another group selects and sets an in-use code and sends an Ack packet, a communication participation expression Ack packet for the number of members to the group is sent. Interrupt intensively, the throughput of the group temporarily decreases. According to the present invention, in order to solve such a problem, each member terminal randomly sets a code.

FIG. 18 is a flow chart for explaining still another embodiment of the network communication system by wireless communication according to the present invention, and shows the communication procedure of the member terminals. The communication procedure of the host terminal is the same as that of FIG. 16 which is the communication procedure described in claim 10. Each member terminal randomly selects a spreading code, spreads the communication participation expression Ack packet with the setting code, and sends it (S131, 132). The data structure of the communication participation announcement Ack packet includes an ID unique to each terminal, as shown in FIG. The member terminal recognizes the setting code as the selection code when receiving the confirmation packet sent from the host terminal within a predetermined time (S133). If the confirmation packet is not received after a predetermined time has passed (S134, 135), the setting code is randomly selected and changed, and the above procedure is repeated. Each member terminal randomly sets a code (S136) to prevent a decrease in throughput in other groups.

Next, the invention according to claim 12 will be described. In the communication procedure of claim 7, claim 9 or claim 10, the host terminal sends the confirmation packet or the transfer packet only when receiving the communication participation expression Ack packet from the own group member terminal. According to the present invention, the host terminal responds to the communication participation expression Ack packet even when receiving the communication participation expression Ack packet from the member terminals of different groups.

FIG. 19 is a flow chart for explaining still another embodiment of the network communication system by wireless communication according to the present invention, and shows the communication procedure of the host terminal. The host terminal waits for the arrival of the communication participation expression Ack packet by the communication procedure of claim 7, claim 9, and claim 10 (S141),
The received packet is despread and demodulated (S142), the demodulated signal is taken into the computer main body, and it is verified whether or not the demodulated signal is a communication participation expression Ack packet from a member terminal belonging to the same group (S143). In the case of a communication participation expression Ack packet from a different group member, a packet including code usage status information as shown in FIG. 4B is spread with a setting code and transmitted (S146). The information about the code usage status is obtained by the host terminal when the empty code is selected. The member terminal that has transmitted the communication participation expression Ack packet demodulates the packet, compares the group ID included in the packet with the own group ID, and recognizes the code corresponding to the own group ID as the selection code.

[0047]

As is apparent from the above description, the present invention has the following effects. (1) Effect corresponding to claim 1: A method of transmitting a channel to a group member using a selection code can be provided. (2) Effect corresponding to claim 2: It is possible to provide a method of confirming the selection code for preventing erroneous recognition of the selection code. (3) Effect corresponding to claim 3: It is possible to provide a channel transmission method to a group member using a selection code. (4) Effect corresponding to claim 4: Group members are
In transmitting the selection code, it is only necessary to know the data common to the network, and it is easy to configure a group of arbitrary member terminals of the network. (5) Effect corresponding to claim 5: Even when the host terminals of a plurality of groups send transmission packets for transmitting the selection code almost at the same time, the selection code can be correctly recognized. (6) Effect corresponding to claim 6: The time required for selecting code recognition can be shortened. (7) Effect corresponding to claim 7: A method of confirming selection code transmission using a selection code can be provided. (8) Effect corresponding to claim 8: A channel transmission method to a group member using a pilot code can be provided. (9) Effect corresponding to claim 9: A method of confirming selection code transmission using a pilot code can be provided. (10) Effect corresponding to claim 10: A method of transmitting a channel to a group member using a selection code can be provided. (11) Effect corresponding to claim 11: It is possible to prevent a decrease in throughput in another group. (12) Effect corresponding to claim 12: The time required to recognize the selection code of the member terminal is shortened.

[Brief description of drawings]

FIG. 1 is a configuration diagram for explaining an embodiment of a network communication system by wireless communication according to the present invention.

FIG. 2 is a flowchart showing a communication procedure when starting network communication according to the present invention.

FIG. 3 is a diagram showing a configuration example of a wireless terminal for implementing the present invention.

FIG. 4 is a diagram showing a configuration example of a data packet used in the present invention.

FIG. 5 is a flowchart for explaining an embodiment (claim 1) of a network communication system by wireless communication according to the present invention.

FIG. 6 is a flowchart (No. 1) for explaining another embodiment (Claim 2) of the network communication system by wireless communication according to the present invention.

FIG. 7 is a flowchart (No. 2) for explaining another embodiment (Claim 2) of the network communication system by wireless communication according to the present invention.

FIG. 8 is a flowchart for explaining still another embodiment (claim 3) of the network communication system by wireless communication according to the present invention.

FIG. 9 is a flow chart (No. 1) for explaining still another embodiment (claim 6) of the network communication system by wireless communication according to the present invention.

FIG. 10 is a flowchart (No. 2) for explaining still another embodiment (claim 6) of the network communication system by wireless communication according to the present invention.

FIG. 11 is a diagram showing a configuration example of another wireless terminal for realizing the present invention.

FIG. 12 is a flowchart for explaining still another embodiment (claim 7) of the network communication system by wireless communication according to the present invention.

FIG. 13 is a flow chart for explaining still another embodiment (claim 8) of the network communication system by wireless communication according to the present invention.

FIG. 14 is a flow chart (No. 1) for explaining still another embodiment (claim 9) of the network communication system by wireless communication according to the present invention.

FIG. 15 is a flowchart (No. 2) for explaining still another embodiment (claim 9) of the network communication system by wireless communication according to the present invention.

FIG. 16 is a flowchart (No. 1) for explaining still another embodiment (claim 10) of the network communication system by wireless communication according to the present invention.

FIG. 17 is a flowchart (No. 2) for explaining still another embodiment (claim 10) of the network communication system by wireless communication according to the present invention.

FIG. 18 is a flow chart for explaining still another embodiment (Claim 11) of the network communication system by wireless communication according to the present invention.

FIG. 19 is a flowchart for explaining still another embodiment (claim 12) of the network communication system by wireless communication according to the present invention.

[Explanation of symbols]

1a to 1d, 2a to 2d ... Radio terminal, 3 ... Radio channel A, 4 ... Radio channel B, 11 ... Spread code generator, 1
2 ... Correlation detector, 13 ... Channel controller, 14 ...
Computer body, 15 ... network controller,
16 ... Transceiver, 17 ... Antenna, 21-1 to 21-n
... Spread code generator, 22-1 to 22-n ... Correlation detector, 2
3 ... Channel controller, 24 ... Computer main body,
25 ... Network controller, 26 ... Transceiver, 27 ... Antenna.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Yoshikatsu Nakagawa 1-3-6 Nakamagome, Ota-ku, Tokyo Inside Ricoh Co., Ltd.

Claims (12)

[Claims] 1. A plurality of groups arbitrarily configured by a plurality of wireless terminals is a wireless network in which wireless terminals belonging to the respective groups perform peer-to-peer distributed network communication, and when any group performs network communication. , One of the wireless terminals belonging to the group becomes a host terminal, and the other remaining wireless terminals become member terminals, senses a communication channel being used in another group, determines an empty channel, and After selecting it as the communication channel to use, at least inform the member terminals belonging to the same group of the selected communication channel,
In the network communication method by wireless communication configured so that the member terminals confirm the communication channel used in the group and then start the peer-to-peer distributed network communication using the communication channel, the communication channel used in each group is In a communication system that is code-division-multiplexed with an individual spreading code, communication within the same group senses the presence or absence of a spread signal that is spread spectrum with the individual spreading code, and transmits when the spread signal is not detected. Yes, the host terminal spreads and transmits the transmission packet with the selected code, and the member terminals belonging to the same group despread the transmission packet with all spreading codes available in the system, and the signal level after despreading. It is characterized by recognizing the spreading code with the highest Network communication system based on wireless communication that. 2. The host terminal, after spreading and transmitting the transmission packet with the selected code, waits for the arrival of the communication participation expression Ack packet with the selection code, and the communication participation expression Ack packet from the member terminals belonging to the same group. Immediately after receiving the confirmation packet, the confirmation packet spread with the selection code is sent out, and the member terminals belonging to the same group despread the received packet with all spreading codes available in the system, and in descending order of the signal level after despreading. Spread codes are sorted, spread codes are selected in the sorted order, and a communication participation expression A including the ID unique to the member terminal by the same code A
Sends ck packet after spreading it, waits for confirmation packet with the same code, waits for a predetermined time, and then does not receive confirmation packet, selects code in the sorted order and performs the above procedure to receive confirmation packet After that, the same code is confirmed as the selection code, and the host terminal receives the communication participation expression Ack packet from at least all the member terminals belonging to the same group, and then uses the selected code to spread the spectrum to each member of the group. The network communication method by wireless communication according to claim 1, wherein multicast communication or broadcast communication is performed. 3. In a wireless network in which a plurality of groups arbitrarily configured by a plurality of wireless terminals perform peer-to-peer distributed network communication among wireless terminals belonging to each group, when any group performs network communication, One of the wireless terminals belonging to the group becomes a host terminal, and the other remaining wireless terminals become member terminals, senses a communication channel being used by another group, determines an empty channel, and uses the group. After selecting it as a communication channel, at least inform the member terminals belonging to the same group of the selected communication channel,
In the network communication method by wireless communication configured so that the member terminals confirm the communication channel used in the group and then start the peer-to-peer distributed network communication using the communication channel, the communication channel used in each group is In a communication system that is code-division-multiplexed with an individual spreading code, communication within the same group senses the presence or absence of a spread signal that is spread spectrum with the individual spreading code, and transmits when the spread signal is not detected. Yes, the host terminal spreads and transmits the transmission packet with the selected code, and the member terminals belonging to the same group despread the reception packet with all the spreading codes available in the system and then demodulate the transmission packet. The spreading code used to obtain the included demodulated signal is the selected code of the own group. Network communication method by the wireless communication, characterized in that to recognize that. 4. The network communication system by wireless communication according to claim 3, wherein the transmission packet includes data unique to a group. 5. The network communication method according to claim 3, wherein the transmission packet includes data common to the network. 6. The network communication system by wireless communication according to claim 3, wherein the despread signal is demodulated in order of the code having a higher signal level after the despread. 7. The host terminal waits for the arrival of a communication participation expression Ack packet with a selection code after sending a transmission packet, and immediately after receiving a communication participation expression Ack packet from a member terminal belonging to the same group. When the confirmation packet is spread with the same code and sent to the members and the communication participation expression Ack packet from all the member terminals is not received within a predetermined time, the transmission packet is spread and sent with the selection code, and the above procedure is executed. After recognizing the selection code, the member terminals belonging to the same group spread and send the communication participation expression Ack packet including the ID unique to the member terminal with the recognized selection code, and send the communication packet with the same code. After receiving the confirmation code, the selection code is recognized again by the communication method according to claim 3, the procedure is performed, and the confirmation packet is received. After confirming the selection code, the host terminal receives the communication participation expression Ack packet from all the member terminals belonging to the same group, and then uses the selection code to perform the spread spectrum multicast communication or the broadcast communication to each member of the group. The network communication system by wireless communication according to claim 3. 8. A plurality of groups arbitrarily configured by a plurality of wireless terminals is a wireless network in which wireless terminals belonging to the respective groups perform peer-to-peer distributed network communication, and when any group performs network communication. , One of the wireless terminals belonging to the group becomes a host terminal, and the other remaining wireless terminals become member terminals, senses a communication channel being used in another group, determines an empty channel, and After selecting it as the communication channel to use, at least inform the member terminals belonging to the same group of the selected communication channel,
After confirming the communication channel used by the other member terminals in the group, in the network communication method by wireless communication configured to start the peer-to-peer distributed network communication using the communication channel, the communication channel used in each group is Each group is code division multiplexed with an individual spreading code, and communication within the same group is
A communication system which senses the presence or absence of a spread spectrum signal spread by the individual spread code, and transmits when the spread signal is not detected, wherein a pilot code which is a spread code for communication channel control common to the system is provided, The host terminal spreads a transmission packet including at least data related to its own group ID and selection code with the pilot code and sends it out, and member terminals belonging to the same group receive the transmission packet, despread with the pilot code and demodulate. Then, a network communication method by wireless communication characterized by recognizing the selection code of its own group. 9. The host terminal waits for the arrival of the communication participation expression Ack packet by the pilot code after transmitting the transmission packet, demodulates after receiving the communication participation expression Ack packet from all the member terminals belonging to the same group, If the code included in the Ack packet and the selection code are not matched and they do not match, the transmission packet is sent to the member by spreading the pilot code with the pilot code, and the procedure is performed. When they match, the pilot code is immediately confirmed to the member. After spreading the packet, the member terminals belonging to the same group, after recognizing the selection code, spread the communication participation expression Ack packet including the ID unique to the member terminal and the data regarding the type of the spreading code recognized by the pilot code. After sending out, waiting for communication with the pilot code, receiving the transmission packet, and billing again Recognizes the selection code in a communication system 8 according perform the procedure, after receiving the acknowledgment packet,
Waiting for the communication to start with the selection code, the host terminal announces that all member terminals belonging to the same group will participate in the communication.
9. The network communication system by wireless communication according to claim 8, wherein after the ck packet is received, the selection communication is used to perform the multicast communication or the broadcast communication by the spread spectrum to each member of the group. 10. A plurality of groups arbitrarily configured by a plurality of wireless terminals is a wireless network in which wireless terminals belonging to the respective groups perform peer-to-peer distributed network communication, and when any group performs network communication. , One of the wireless terminals belonging to the group becomes a host terminal, and the other remaining wireless terminals become member terminals, senses a communication channel being used in another group, determines an empty channel, and After selecting the communication channel to be used, at least inform the member terminals belonging to the same group of the selected communication channel, confirm the communication channel used by the member terminal, and then use the communication channel to perform peer-to-peer distributed network communication. To the network communication method by wireless communication configured to start In this case, the communication channels used in each group are code-division-multiplexed with the individual spreading code for each group, and the communication within the same group senses the presence or absence of the spread signal spread by the individual spreading code. A communication system which transmits when the spread signal is not detected, the host terminal waits for the arrival of the communication participation expression Ack packet with the selected code after selecting the code,
Immediately after receiving a communication participation expression Ack packet from a member terminal belonging to the same group, a confirmation packet is immediately spread and transmitted with a selection code, while the member terminal uses one of the spreading codes available in the system. The communication participation expression Ack packet including the unique ID to the member terminal is spread and transmitted, the confirmation packet is waited for with the same code, and when the confirmation packet is not received after a predetermined time, the spreading code is changed to A network communication method by wireless communication characterized by recognizing the received code as a selection code after performing a procedure and receiving a confirmation packet. 11. The network communication system by wireless communication according to claim 10, wherein when the member terminal changes the selection code, the spreading code is randomly selected and changed. 12. After the host terminal receives a communication participation expression Ack packet from a member terminal of a different group,
11. The wireless communication network according to claim 7, 9 or 10, wherein a packet including a group ID of a group existing in the system and data related to a selection code corresponding to the group ID is spread by a setting code and transmitted. Communication method.