JP4817604B2 - Wireless communication network system, fixed wireless terminal, mobile wireless terminal, wireless communication method, and wireless communication program - Google Patents

Description

  The present invention relates to a wireless communication network technology in which a plurality of devices transmit and receive data by wireless communication, and in particular, a transmitting wireless terminal connected to a wireless communication network packetizes and transmits various information and other wireless terminals The present invention relates to a technique used in a system for transferring to a destination wireless terminal while repeating relaying, and further, a wireless communication network system, a fixed wireless terminal, a mobile wireless terminal, a wireless communication method when a mobile wireless terminal exists in the wireless communication network, And a wireless communication program.

  Conventionally, in a wireless communication network, each wireless terminal creates wireless connection information between wireless terminals in order to perform data transfer between arbitrary wireless terminals in a multi-hop wireless communication network configured in a mesh shape. There is known a wireless communication network capable of recognizing the mutual positional relationship by exchanging information and transferring the data by making this information known to all wireless terminals of the wireless communication network. In order for each wireless terminal to recognize the mesh structure of the wireless communication network and the connection position of the wireless terminal, a certain period and time until the wireless connection information is spread throughout the wireless communication network are required.

  In other words, the conventional technology is for fixed wireless terminals, and can only cope with a device whose configuration does not change sufficiently long with respect to a certain period and the time until wireless connection information spreads throughout the wireless communication network. This wireless communication network system is disclosed in Patent Document 1.

  For example, when the mobile wireless terminal recognizes the wireless connection information of the mobile wireless terminal based on the moving speed of the mobile wireless terminal and tries to transfer a packet based on the information, the mobile wireless terminal may have already moved to another location, and the data has moved. There is a possibility that it will not be transferred correctly to the wireless terminal.

Further, in the wireless communication network as described above, Patent Document 2 discloses details as a technique targeting mobile wireless terminals. When there is one or more wireless terminals moving in the wireless communication network, packetized data can be transferred to the moving wireless terminal without recognizing the position of the mobile wireless terminal, and also transferred from the moving wireless terminal Although there is a technology that can do this, fixed wireless terminals will continue to transmit packets according to the moving speed of the mobile wireless terminals, resulting in unnecessary packets being transmitted over the wireless communication network, resulting in increased traffic. Was considered. Further, since packet reception confirmation is not performed between the fixed wireless terminal and the mobile wireless terminal, there is a possibility that the packet does not reach the mobile wireless terminal.
JP 2000-13376 A JP 2003-8626 A

  In a conventional wireless communication network, when there is one or more wireless terminals that move in the wireless communication network, the fixed wireless terminal that wants to transmit information transmits the data to the mobile wireless terminal. It was necessary to recognize which wireless terminal is currently connected. However, depending on the mobile radio terminal, when the fixed radio terminal recognizes the radio connection information of the mobile radio terminal by a method as described in Patent Document 2 of the prior art and attempts to transfer a packet based on the information, the mobile radio terminal There is a possibility that the data is not correctly transferred to the mobile radio terminal because it may have already moved to another location.

  In addition, when transmitting by the method of Patent Document 2, the fixed wireless terminal continues to transmit packets according to the moving speed of the mobile wireless terminal, and as a result, transmits a useless packet as a wireless communication network. In addition, there is a problem that there is a possibility that the packet does not reach the mobile radio terminal because the packet reception is not confirmed between the fixed radio terminal and the mobile radio terminal.

  In the wireless communication network, one or more mobile wireless terminals moving in the wireless communication network exist, and the fixed wireless terminal can recognize the position of the mobile wireless terminal and transfer packetized data to the mobile wireless terminal. Such a wireless communication network for the purpose of being able to be transferred from a mobile wireless terminal, further reducing useless packets in the wireless communication network and enabling confirmation of packet reception between the mobile wireless terminal and the fixed wireless terminal. An object is to provide a system, a fixed wireless terminal, a mobile wireless terminal, a wireless communication method, and a wireless communication program.

The present invention employs the following configuration in order to solve the above problems. That is, according to the present invention, the wireless terminal includes a plurality of wireless terminals that perform wireless data communication, and any of the wireless terminals communicates with all other wireless terminals directly or via at least one other wireless terminal. In a possible wireless communication network system, the plurality of wireless terminals include a movable mobile terminal that can move and a fixed wireless terminal that has a fixed installation location, and the fixed wireless terminal can communicate with another fixed wireless terminal. the was investigated by transmission of the broadcast, the configuration information having a relation information data packet itself transmitted is composed of a minimum fixed wireless terminals value and the destination regarding number of relaying required until the call to the destination of the fixed wireless terminal And means for notifying the other fixed wireless terminal of the configuration information, and an adjacent fixed wireless terminal capable of directly communicating with the mobile wireless terminal If there is, means for creating fixed station management information having relationship information with other adjacent fixed wireless terminals, notifying the other fixed wireless terminals of the relationship information with the adjacent fixed wireless terminals, and fixing the caller In the case of a wireless terminal, based on the configuration information, the fixed station management information, and the transmission source management information , a means for creating transmission source management information having information related to adjacent fixed wireless terminals, between the fixed wireless terminals A means for transmitting the data packet to the destination fixed wireless terminal, a means for transmitting / receiving the data packet to / from the mobile wireless terminal, and a specific time and means for deleting the fixed station management information and the source management information after elapse comprises, the mobile wireless terminal moves to any one communicable range of the fixed wireless terminal While a receiving means for receiving a broadcast data packet to the fixed wireless terminals addressed, on the basis of the data packets, the mobile station management with information on the relationship between the adjacent fixed wireless terminals that can communicate himself directly generates information, and means for notifying the mobile station management information to the neighboring fixed radio terminal, on the basis of the mobile station management information, and means for transmitting and receiving the said adjacent fixed wireless terminals, the mobile station management after certain time And a means for deleting information .

The fixed wireless terminal, when transmitting a data packet to the mobile wireless terminal, means for transmitting the data packet to all the other fixed wireless terminals one or more times including relay transfer, and the mobile wireless terminal Means for receiving the data packet having the mobile station management information from the mobile station , recognizing that the mobile radio terminal is nearby, and creating the fixed station management information having relationship information with other adjacent fixed radio terminals ; Means for generating a data packet for transmission to be transmitted to a target fixed wireless terminal based on the data packet having the mobile station management information , and transmitting the data packet to the target fixed wireless terminal. .

  When the mobile radio terminal needs to transmit a data packet to an arbitrary fixed radio terminal, the adjacent fixed radio terminal is changed to a first relay fixed radio terminal based on the data packet received from the adjacent fixed radio terminal. And a means for detecting and recognizing the adjacent fixed wireless terminal, wherein the first relay fixed wireless terminal relays the data packet while relaying between the plurality of fixed wireless terminals. By transferring the data packet to the target fixed wireless terminal.

In a wireless terminal configured by a plurality of wireless terminals performing wireless data communication, any of the wireless terminals can communicate with all other wireless terminals directly or through at least one other wireless terminal, The plurality of wireless terminals are composed of mobile wireless terminals that can be moved and fixed wireless terminals that have fixed installation locations. The fixed wireless terminals investigate other fixed wireless terminals that can communicate with each other by sending a broadcast and send them by themselves. Configuration information having relational information consisting of a value related to the minimum number of relays required until the data packet to be received at the destination fixed wireless terminal and the destination fixed wireless terminal is created, and is transmitted to the other fixed wireless terminal. If the means for notifying the configuration information is an adjacent fixed wireless terminal capable of directly communicating with the mobile wireless terminal, it has relationship information with other adjacent fixed wireless terminals. Means for creating fixed station management information and notifying the other fixed wireless terminal of the relationship information with the adjacent fixed wireless terminal; Based on the configuration information, the fixed station management information, and the source management information , the data packet is transferred while being relayed between the fixed wireless terminals based on the means for creating the source management information having , Means for transmitting the data packet to the destination fixed wireless terminal, and means for deleting the fixed station management information and the source management information after elapse of a specific time , the data packet addressed to the mobile wireless terminal sending to, above all other fixed wireless terminal, means for transmitting the data packet one or more times including the relay transfer, the mobile radio terminal from the mobile radio terminal It recognizes that direct mobile station management information is relationship information can communicate with the said adjacent fixed wireless terminals to receive the data packets having the mobile radio terminal is near the other adjacent fixed wireless terminals Generating fixed station management information having relationship information with the mobile station , and generating a data packet for transmission to be transmitted to a target fixed wireless terminal based on the data packet having the mobile station management information , Means for transmitting to the terminal.

In a wireless terminal configured by a plurality of wireless terminals performing wireless data communication, any of the wireless terminals can communicate with all other wireless terminals directly or through at least one other wireless terminal, The plurality of wireless terminals includes a movable mobile wireless terminal and a fixed wireless terminal whose installation location is fixed, and the mobile wireless terminal moves within a range communicable with any one of the fixed wireless terminals, Based on the data packet, the mobile station management information having the relationship information between the receiving means for receiving the data packet broadcasted to the fixed wireless terminal and the adjacent fixed wireless terminal that can communicate directly with the receiving means is created. and means for notifying the mobile station management information to the neighboring fixed radio terminal, on the basis of the mobile station management information, and means for transmitting and receiving the said adjacent fixed wireless terminals And means for deleting said mobile station management information after lapse of a specified time, the neighbor when the need arises for the data packet transmission for any fixed wireless terminals, based on the data packet received from the adjacent fixed wireless terminals A fixed wireless terminal as a first relay fixed wireless terminal; and means for transferring data packets; and a means for detecting and recognizing the adjacent fixed wireless terminal, wherein the first relay wireless terminal includes the plurality of fixed wireless terminals. It is characterized by comprising means for transferring the data packet to the target fixed wireless terminal by transferring the data packet while relaying between them.

In a wireless communication network system configured by a plurality of wireless terminals that perform wireless data communication, all of which can communicate with all other wireless terminals directly or via at least one other wireless terminal In the wireless communication method to be executed, the plurality of wireless terminals include a movable mobile wireless terminal and a fixed wireless terminal having a fixed installation location, and the fixed wireless terminal can communicate with another fixed wireless terminal. A configuration having a relational information consisting of a value relating to the minimum number of relays required until a data packet transmitted by itself is received at the destination fixed wireless terminal by investigating the terminal by broadcast transmission and the destination fixed wireless terminal An adjacent fixed wireless terminal that creates information, notifies the other fixed wireless terminal of the configuration information, and can directly communicate with the mobile wireless terminal. A fixed station management information having relationship information with another adjacent fixed wireless terminal is created, the relationship information with the adjacent fixed wireless terminal is notified to the other fixed wireless terminal, and the fixed wireless terminal of the incoming call source In some cases, source management information having relational information with adjacent fixed wireless terminals is created and relayed between the fixed wireless terminals based on the configuration information, the fixed station management information, and the source management information. By transferring the data packet, the data packet is transmitted to the destination fixed wireless terminal, the data packet is transmitted / received to / from the mobile wireless terminal, and the fixed station management information and the remove the source management information, when transmitting data packets to the mobile radio terminal addressed to the other fixed wireless terminal, transmitting the data packet one or more times by including the relaying Recognizing that the received the mobile wireless terminal a data packet having a mobile station management information is relationship information between the neighboring fixed radio terminal from the mobile radio terminal can communicate directly with the mobile wireless terminal is near Then, the fixed station management information having the relationship information with other adjacent fixed wireless terminals is created , and the transmission data packet to be transmitted to the target fixed wireless terminal is created based on the data packet having the mobile station management information. The mobile wireless terminal receives a data packet broadcasted to the fixed wireless terminal while moving within a range where it can communicate with any one of the fixed wireless terminals. Then, based on the data packet, mobile station management information having relationship information with an adjacent fixed wireless terminal that can communicate directly with the mobile station is generated, and the adjacent fixed wireless The mobile station management information is notified to a terminal, and the mobile station management information is transmitted / received to / from the adjacent fixed wireless terminal based on the mobile station management information. Based on the mobile station management information of the data packet received from the wireless terminal, the adjacent fixed wireless terminal is used as the first relay wireless terminal to transfer the data packet, and the first relay wireless terminal is connected between the plurality of fixed wireless terminals. Then, the data packet is transferred to the target fixed wireless terminal by transferring the data packet while relaying in the middle, and the mobile station management information is deleted after a specific time has elapsed .

  A computer-executable communication program including a software program for executing the wireless communication method is provided. By recognizing the connection status of a mobile radio terminal moving in the radio communication network with this configuration, it is possible to transmit a useless packet as in the prior art method, and between the mobile radio terminal and the fixed radio terminal. Since packet reception confirmation can be taken, reliability can be improved, and packets can be transmitted and received between the mobile radio terminal and the fixed radio terminal.

  As described above, according to the present invention, even when one or more mobile radio terminals exist in a radio communication network in a specific area, the connection status between the mobile radio terminal and the fixed radio terminal By recognizing the packet and transmitting the packet based on the connection status, it is possible to confirm the reception between the fixed wireless terminal and the mobile wireless terminal without transmitting a useless packet in the wireless communication network. It is possible to perform highly reliable wireless communication. Further, by using the connection status between the mobile radio terminal and the fixed radio terminal, wireless communication can be performed from either the fixed radio terminal to the mobile radio terminal or from the mobile radio terminal to the fixed radio terminal. Thereby, it is possible to improve the usability of the wireless communication network.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. FIG. 1 is a diagram showing an example of a wireless communication network distributed in a specific area. In FIG. 1, the wireless communication network includes wireless devices A (1A), B (1B), C (1C), D (1D), E (1E), and F (1F), which are fixed wireless terminals. A dotted line in the figure is a wireless communication route and is a communication range that can be directly connected, and a wireless terminal can perform packet communication in a bucket relay manner.

In FIG. 1, a wireless device H (1H), which is a mobile wireless terminal, is a wireless terminal that moves within the wireless communication network. The wireless device H (1H), which is a mobile wireless terminal, can receive a packet transmitted by any of the wireless devices A (1A) to F (1F), which is a fixed wireless terminal, at all locations in the moving range. Radio devices A (1A) to F (1F) are arranged in the network.
Conventionally, the wireless devices A (1A) to F (1F) recognize the positional relationship from each other's wireless connection information by the method described in Patent Document 1 and notify the mesh structure of the wireless communication network and the mutual positional relationship. And the mobile radio terminal transmits the radios A (1A) to F (1F), which are fixed radio terminals, to other than the source fixed radio terminal by the method described in Patent Document 2 above. The wireless device H (1H) can intercept a packet sufficiently faster than the moving speed of the wireless device H (1H), and when the wireless device H (1H) performs data transfer, the packet received last is transmitted. If it is in the vicinity of the wireless device that is the fixed wireless terminal, it recognizes the first relay fixed wireless terminal and transfers the packet.

  Thereafter, the packet is transferred to the target fixed wireless terminal by the method described in Patent Document 1, and data can be transferred from the fixed wireless terminal and the mobile wireless terminal without recognizing the wireless connection information of the mobile wireless terminal. It was a thing.

  FIG. 13 is a configuration diagram of a fixed radio terminal device and a mobile radio terminal device, and shows configurations of a fixed radio terminal (133) and a mobile radio terminal (133). The fixed wireless terminal (133) and the mobile wireless terminal (133) have an antenna (131) used for transmission / reception, and 132 is a transmission / reception unit having a function of Patent Document 1 as a prior art, a communication control unit, a packet analysis unit, There is an information processing control unit, which includes a management information storage unit (135) and a management information control processing unit (134). The management information storage unit (135) stores the management information (wireless connection information) (hereinafter the same) received by the fixed wireless terminal or the mobile wireless terminal, and 134 controls the management information and stores the necessary packet information. Create and store.

In FIG. 1, let us consider a case where a packet is transferred from a wireless device A (1A) which is a fixed wireless terminal to a wireless device H (1H) which is a mobile wireless terminal.
FIG. 2 is a flowchart for transmitting a packet from a fixed wireless terminal to a mobile wireless terminal. In FIG. 1, the wireless device A (1A) that is the transmission source does not currently include management information for the wireless device H (1H) ( Consider the initial state. The wireless device A starts a search (S2) to detect the wireless device H according to the flow of FIG. The source wireless device A (1A) performs broadcast transmission, and the wireless device B (B) and the wireless device C (1C) installed in a range that can be directly connected to the wireless device A (1A) Receive broadcast packets.

  Next, the wireless device B (1B) and the wireless device C (1C) transmit packets by broadcast transmission. (As a method for recognizing that it is broadcast, it is determined by the broadcast identifier in the incoming header portion of Patent Document 2), and further, each wireless device is determined to be broadcast transmission and performs broadcast transmission. The wireless device A (1A), the wireless device C (1C), and the wireless device D (1D) receive the packet broadcasted by the wireless device B (1B) as described above.

  The source wireless device A (1A) receives broadcast transmission from the wireless device B (1B), stops broadcast transmission, and the wireless device C (1C) also stops broadcast transmission. The wireless device A (1A), the wireless device B (1B), and the wireless device E (1E) receive the packet broadcasted by the wireless device C (1C), and the wireless device H (1H) of the mobile wireless terminal also receives the wireless device at this time. A broadcast transmission from C (1C) is received.

  Since the wireless device A (1A) is the transmission source, the broadcast transmission is stopped, and the wireless device B (1B) has already received the broadcast-transmitted packet. 1D), the wireless device E (1E), and the wireless device F (1F) also perform broadcast transmission. The above communication sequence is shown in FIG.

  FIG. 3 shows a communication sequence between the wireless devices A (1A) to F (1F) which are fixed wireless terminals in the wireless communication network and the wireless device H (1H) which is a mobile wireless terminal. Each arrow represents a time axis, and a dotted line on the vertical axis represents a timing relationship between transmission and reception of a communication range that can be directly connected from each wireless device at a transmission timing point of a packet broadcasted by the wireless device (FIG. 3). In FIG. 4, reception and transmission are at the same timing, but the reception timing is actually delayed from the transmission timing).

The wireless device H (1H), which is a mobile wireless terminal, performs the broadcast transmission, so that the wireless device H receives the broadcast transmission as shown in FIG. 3 (31) (32).
Radio C (1C) performs broadcast transmission (31), radio E (1E) performs broadcast transmission (32), and radio H (1H) receives each. However, since the radio D (1D) is also transmitted at this timing, in this case, the radio D (1D) cannot be intercepted by the radio H (1H). In other words, the range 33 in FIGS. The wireless devices that can be directly connected to the wireless device D (1D) are the wireless devices B (1B), E (1E), and F (1F), which are 34, 35, and 36.

  Therefore, a radio that can be directly connected to the radio H (1H) can receive only the transmissions of the radio C (1C) and E (1E). From this, a nearby radio can be determined. The wireless device H (1H) holds information that the wireless devices in the vicinity are C (1C) and E (1E), and registers the information as mobile station management information.

  FIG. 4 shows an example of mobile station management information. The mobile station management information includes a communication partner fixed wireless device ID and a communication partner fixed terminal for the wireless communication device A (1A) which is a target communication partner, in this case, a fixed wireless terminal. (The configuration of the mobile station management information is an example, and the order of each ID is not determined).

  Next, the wireless device H (1H) sets the mobile station management information held therein after a specific time (the specific time is a fixed value calculated based on the environmental change in the wireless communication network, the moving speed of the mobile wireless terminal, or , Event, value recalculated every time, etc.) to each fixed wireless terminal in the wireless communication network. The wireless device C (1C) and the wireless device E (1E), which are fixed wireless terminals that have received the notified mobile station management information, register as internal fixed station management information based on the received mobile station management information.

  5 and 6 show examples of the fixed station management information registered. FIG. 5 is an example of the fixed station management information of the wireless device C (1C), and FIG. 6 is an example of the fixed station management information of the wireless device E (1E). The fixed station management information is composed of a mobile radio ID, an ID of a fixed radio terminal other than its own station connected to the mobile radio terminal, and another adjacent fixed radio ID. (The configuration of the fixed station management information is an example, and the order of each ID is not determined.) As described above, the radio H (1H) and the radio C (1C) are determined by the “mobile station management information” and the “fixed station management information”. ) And wireless device E (1E) were able to recognize their “positional relationships”.

  However, since the wireless device A (1A) that is the transmission source of the packet that has been broadcasted has not yet recognized the wireless device H (1H) that is a mobile wireless terminal, the wireless device H (1H) is created earlier. A response packet is created based on the mobile station management information described in 4 and a response is returned to the wireless device A (1A) as the transmission source. Figure 7 shows an example of the response packet format.

  FIG. 7 is composed of the transmission source radio ID and destination radio ID of the packet, the relay transmission source radio ID, and the relay reception radio ID. Radio H (1H) is wireless H for mobile radio ID, radio H (1H) for source radio ID, radio A (1A) for destination radio ID, and radio for relay source radio ID. Machine H (1H) is stored. By referring to the mobile station management information for the adjacent fixed wireless device for the relay receiving wireless device ID, it can be seen that the adjacent fixed wireless devices are the wireless device C (1C) and the wireless device E (1E). The relay receiving radio ID is stored by selecting either the radio C (1C) or the radio E (1E) from the adjacent fixed radio ID of the mobile station management information in FIG. The radio selection method may be determined by the location of the ID, but it is also conceivable to prepare calculation as another selection method. For example, diversity is performed using the reception level. In this example, the wireless device C (1C) is stored in the relay receiver wireless device ID, and the wireless device H (1H) transmits the response packet created above.

When the wireless device C (1C) receives the response packet, the wireless device C (1C) recognizes that the relay receiving destination wireless device ID is the same, performs relay reception, and performs the following processing.
Radio C (1C) creates a transmission packet from the response packet transmitted from radio H (1H). The mobile radio ID of the packet remains the radio H (1H), the source radio ID is the radio C (1C), and the relay source radio ID is the radio C (1C). The relay receiver radio ID is selected based on the configuration information shown in FIG. 8 by a conventional method. FIG. 8 shows an example of configuration information (related information) (hereinafter the same) of the wireless device C (1C). FIG. 8 includes a wireless device ID and the number of relays required for transmission to each wireless device in the wireless network. The wireless device C (1C) selects the wireless device A (1A) as the relay receiving destination wireless terminal from FIG. An example of the created packet is shown in FIG. Radio C (1C) transmits the created packet and radio A (1A) receives it.

  The wireless device A (1A) recognizes that the destination wireless device ID is the same from the received packet of FIG. 9, performs incoming processing, and registers it in the transmission source management information held by the received packet. First, it can be seen from FIG. 9 that the mobile radio terminal is the radio H (1H) and the source radio terminal is the radio C (1C) (S3).

  This information is registered in the sender management information. An example of the registered result is shown in FIG. FIG. 10 includes a mobile radio terminal ID and a fixed radio ID adjacent to the mobile radio terminal. By performing as described above, the wireless device A (1A) can recognize the presence of the wireless device H (1H) (S3).

Next, a data packet is transmitted from the wireless device A (1A) to the wireless device H (1H) (S4).
When the wireless device A (1A) refers to the source management information and selects a fixed wireless terminal adjacent to the mobile wireless terminal, the fixed wireless terminal adjacent to the wireless device H (1H) that is the mobile wireless terminal is wireless device C. It can be seen that (1C). Therefore, the wireless device C (1C) is used as a temporary destination, and the packet is transmitted using the conventional technology described above (S4).
A packet format example in this case is shown in FIG.
Next, the wireless device C (1C) processes incoming packets because the destination wireless device IDs match, but it can be seen that the wireless device H (1H) is stored in the mobile wireless device ID. Then, the radio C (1C) edits the mobile radio ID to the destination radio ID and transmits a packet to the mobile radio terminal.

An example of a packet format to be transmitted is shown in FIG. The wireless device H (1H) receives the packet from the wireless device C (1C) and transmits a reception response to the wireless device C (1C), so that the wireless device C (1C) receives the packet from the wireless device H (1H). Can be confirmed.
However, let us consider a case where the wireless device C (1C) fails to receive a reception response from the wireless device H (1H). Referring to the fixed station management information of FIG. 5 held by the wireless device C (1C), it can be seen that another adjacent fixed wireless device exists and is the wireless device E (1E). Therefore, the destination wireless device ID is temporarily changed to the wireless device E (1E), the number of retries in the packet is decremented by 1, and relayed to the wireless device E (1E). The wireless device E (1E) relays and receives and the destination wireless device IDs match, so it can be seen that the mobile wireless ID exists next. Therefore, as in the case of the wireless device C (1C), a packet is transmitted to the wireless device H (1H), and if a reception response can be received from the wireless device H (1H), the communication is terminated.

  However, if the reception response is still not received, the fixed station management information of the wireless device E (1E) is referred to and repeated up to the number of retries. Communication ends when the number of retries is 0 (an optimal value may be selected for the number of retries, and a fixed value or a variable value may be used by calculation according to the situation).

  Next, when transmitting a packet from the wireless device H (1H) to the wireless device A (1A), refer to the mobile station management information, select the wireless device C (1C) as an adjacent fixed wireless terminal, and transmit the packet. The wireless device H (1H) stops transmission because it can receive that the packet is relayed from the wireless device C (1C) to the wireless device A (1A) using the conventional technology. If the packet transmitted by the wireless device C (1C) cannot be received, the mobile station management information is referred again and retransmitted to the wireless device E (1E). Hereinafter, the retransmission is repeated until the packet transmitted by the wireless device E (1E) or the wireless device C (1C) can be received or until the number of retries is exceeded.

Next, let us consider a case where the mobile radio terminal has no mobile station connection information for the target fixed radio terminal when transmitting a packet to a certain fixed radio terminal in the radio communication network.
The mobile radio terminal searches for a connection status with a fixed radio terminal in the radio communication network.

  The mobile radio terminal broadcasts a packet for searching, and a fixed radio terminal adjacent to the mobile radio terminal receives the packet. The received adjacent fixed wireless terminal returns a reception response after a random time. (Here, the random time may be a preset time, or each wireless terminal may calculate based on the wireless device ID.) The mobile wireless terminal receives the packet returned after the random time and manages the mobile station based on the packet. The mobile station management information is registered in the information and notified to each fixed wireless terminal. The adjacent fixed wireless terminal that has received the notified mobile station management information creates and registers the fixed station management information based on the mobile station management information.

  Actually, the wireless communication network in FIG. 1 is searched for information on the wireless device A (1A) that is the object of transmitting data from the wireless device H (1H) that is the mobile wireless terminal. Radio H (1H) broadcasts a packet for searching for an adjacent fixed radio terminal. Assume that the wireless device C (1C) and the wireless device E (1E) receive this packet. The wireless device C (1C) and the wireless device E (1E) return a packet after a random time. The wireless device H (1H) that has received the returned packet knows that the wireless device C (1C) and the wireless device E (1E) are adjacent to each other, and the wireless device is set as the adjacent fixed wireless device ID in the mobile station management information. C (1C) and wireless device E (1E) are registered.

  Next, the wireless device H (1H) notifies the mobile station management information to the fixed wireless terminal. The wireless device C (1C) and the wireless device E (1E) that have received the mobile station management information transmitted by the wireless device H (1H) are registered in the fixed station management information. The wireless device C (1C) registers the wireless device H (1H) as the mobile wireless device ID and the wireless device E (1E) as another adjacent wireless device ID. The wireless device E (1E) registers the wireless device H (1H) as the mobile wireless device ID and the wireless device C (1C) as another adjacent wireless device ID.

  Next, the mobile radio terminal transmits a packet to the target fixed radio, and the fixed radio terminal that has received the packet transfers the packet to the target fixed radio terminal using the above-described conventional technique. For this purpose, the wireless device H (1H) creates a packet addressed to the wireless device A (1A). An example of the created packet is the same as that of the response packet shown in FIG. Radio H transmits the packet of FIG. 7 and radio C (1C) receives it.

  The wireless device C (1C) creates the packet shown in FIG. 9 based on the received packet, transmits the packet to the wireless device A (1A), and the wireless device A (1A) receives the packet. From the received packet, the wireless device A (1A) has the wireless device H (1H), and the wireless device C (1C) is adjacent to the wireless device H (1H). Therefore, the wireless device H (1H) is registered as the mobile wireless terminal and the wireless device C (1C) is registered as the fixed wireless terminal adjacent to the mobile wireless terminal in the transmission source management information held in the wireless device A (1A). Subsequent data transfer from the wireless device A (1A) performs communication using the conventional technique and the above-described method.

Also, the mobile station management information, fixed station management information, and transmission source management information are deleted after the elapse of a specific time in consideration of the update of the moving speed and connection information of the mobile radio terminal.
Next, consider the case where a plurality of mobile radio terminals exist in the wireless communication network. When there are a plurality of mobile radio terminals, there are several states between the fixed radio terminal and the mobile radio terminal. (1) When each mobile radio terminal is at a distance that cannot be directly connected to the source fixed terminal, (2) When each mobile radio terminal is at a distance that can be directly connected to the source fixed terminal, (3) When a plurality of source fixed terminals have accessed one mobile radio terminal, considering (1) and (2) first, the fixed radio terminal in the initial state broadcasts to recognize the mobile radio terminal. Since the mobile wireless terminal that has transmitted the packet and quickly returned to the source fixed wireless terminal is prioritized and the source fixed terminal recognizes, there is only one mobile wireless terminal that the fixed wireless terminal recognizes. Also, there is no problem even if the mobile wireless terminals are directly connected to each other, and only the packet that arrives first is recognized. In (3), even if each source fixed terminal performs broadcast transmission, the same packet that arrives at the mobile radio terminal earlier is given priority. Considering also the relay fixed wireless terminal, the relay fixed terminal transmits a packet from the mobile wireless terminal that can be directly connected and received earlier to the source wireless terminal. Therefore, even if there are a plurality of mobile radio terminals, there is one mobile radio terminal recognized by the source fixed radio terminal. From this, it can be seen that there may be a plurality of mobile radio terminals.

  In addition, the relay fixed wireless terminal and the source fixed wireless terminal retain management information such as communication history information so that the positional relationship of each mobile wireless terminal can be recognized. You can also In addition, the mobile station management information, the fixed station management information, and the transmission source management information described above are not only updated in the moving speed and connection information of the mobile radio terminal, but also registered in the communication history information if there is urgency. The mobile radio terminal may be switched by providing a flag that can be changed.

  As described above, the embodiments of the present invention have been described with reference to the drawings. A program for controlling a wireless communication system to which the present invention is applied is a ROM or RAM memory in which the program code is recorded, Needless to say, this can also be achieved by supplying an external recording device and a portable recording medium to a wireless terminal, and the computer of the wireless terminal reads and executes the program code.

  In this case, the program code itself read from the recording medium realizes the novel function of the present invention, and a portable recording medium or the like on which the program code is recorded constitutes the present invention. Examples of portable recording media for providing the program code include floppy (registered trademark) disk, hard disk, optical disk, magneto-optical disk, CD-ROM, CD-R, DVD-ROM, DVD-RAM, magnetic tape, Various recording media recorded via a network connection device (in other words, a communication line) such as a non-volatile memory card, ROM card, electronic mail or personal computer communication can be used.

  In addition, the function of the above-described embodiment is realized by executing the program code read out on the memory by the computer, and the OS running on the computer based on the instruction of the program code is actually used. Some or all of the processing is performed, and the functions of the above-described embodiments are also realized by the processing.

  Further, after the program code read from the portable recording medium is written in the memory provided in the function expansion board inserted in the computer or the function expansion unit connected to the computer, the program code is read based on the instruction of the program code. The CPU of the function expansion board or the function expansion unit performs part or all of the realization processing, and the functions of the above-described embodiments can also be realized by the processing.

  That is, the present invention is not limited to the embodiments described above, and can take various configurations or shapes without departing from the gist of the present invention.

It is a figure which shows the example of the radio | wireless communication network distributedly arranged in the specific area. It is the flowchart which showed simply the packet transmission from a fixed radio | wireless terminal to a mobile radio | wireless terminal. It is a figure which shows the communication sequence at the time of the broadcast transmission of the fixed radio | wireless terminal in the radio | wireless communication network, the radio | wireless machines A thru | or F, a mobile radio | wireless terminal, and the radio | wireless machine H. It is a figure which shows the structure of the mobile station management information which the radio | wireless machine H has when the fixed radio | wireless terminal in the radio | wireless communication network, the radio | wireless machine A, the mobile radio | wireless terminal, and the radio | wireless machine H communicate. Fixed station management information held by a fixed station, a relay station fixed radio terminal, and a radio C when a radio H communicates with a fixed radio terminal, a radio A and a mobile radio terminal in a fixed radio communication network distributed in a specific area It is a figure which shows a structure. Fixed station management information held by a fixed station, a relay station fixed radio terminal, and a radio E when a radio H and a radio H communicate with each other in a fixed radio communication network distributed in a specific area. It is a figure which shows a structure. It is a figure which shows the structure of the response packet produced based on the mobile station management information which the fixed radio | wireless terminal in the radio | wireless communication network, the radio | wireless machine A, a mobile radio | wireless terminal, and the radio | wireless machine H have. It is a figure which shows the structure of the structure information which a fixed radio | wireless terminal in a radio | wireless communication network, the radio | wireless machine A, a mobile radio | wireless terminal, and the radio | wireless machine H have, and a relay fixed radio | wireless terminal and the radio | wireless machine C have. The figure which shows the structure which produced the response packet based on the configuration information which the fixed radio | wireless terminal in the radio | wireless communication network, the radio | wireless machine A, the mobile radio | wireless terminal, and the radio | wireless machine H have, and the relay fixed radio | wireless terminal and the radio | wireless machine C have It is. The figure which shows the example registered into the transmission origin management information which the fixed radio | wireless terminal in the radio | wireless communication network, the radio | wireless machine A, the mobile radio | wireless terminal, and the radio | wireless machine H have communication, the fixed radio | wireless terminal which is a transmission origin, and the radio | wireless machine A It is. Fixed wireless terminal in wireless communication network, wireless device A and mobile wireless terminal, fixed wireless terminal that is the transmission source when wireless device H communicates, wireless device C when transmitting a packet as a temporary destination It is a figure which shows a packet. When a fixed wireless terminal, a wireless device A and a mobile wireless terminal, and a wireless device H in a wireless communication network communicate with each other, a fixed wireless terminal as a transmission source and a wireless device C edit a destination ID and transmit a packet FIG. It is a figure which shows the structure of a fixed wireless terminal and a mobile wireless terminal.

1A Fixed wireless terminal Radio A
1B Fixed wireless terminal Radio B
1C Fixed wireless terminal Radio C
1D Fixed wireless terminal Radio D
1E Fixed wireless terminal Radio E
1F Fixed wireless terminal Radio F
1H Mobile radio terminal Radio H
S1 Presence / absence of management information of fixed wireless terminal S2 Process of search of mobile wireless terminal by source fixed wireless terminal S3 Determination of search of mobile wireless terminal S4 Packet transmission process by conventional method 31 Radio H transmits transmission of radio C Timing of reception 32 Timing of reception of transmission of the wireless device E by the wireless device H 33 Period from the start of transmission of the wireless device C to the start of transmission of the wireless device E 34 Transmission of the wireless device C and transmission of the wireless device D to the wireless device B 35 The timing at which the wireless device E receives the transmission of the wireless device C and the transmission of the wireless device D 36 The timing at which the wireless device F receives the transmission of the wireless device C and the transmission of the wireless device D 131 Fixed wireless terminal or movement Radio terminal antenna 132 Fixed radio terminal or radio block of mobile radio terminal 133 Fixed radio terminal or mobile radio terminal body 134 Fixed radio terminal or Management information storage unit of the dynamic wireless terminal management information control unit 135 fixed wireless terminals or mobile radio terminal

Claims (7)

In a wireless communication network system configured by a plurality of wireless terminals that perform wireless data communication, all of which can communicate with all other wireless terminals directly or through at least one other wireless terminal ,
The plurality of wireless terminals include a movable mobile wireless terminal and a fixed wireless terminal having a fixed installation location,
The fixed wireless terminal is
By investigating other fixed wireless terminals that can communicate by broadcast transmission, a value relating to the minimum number of relays required until a data packet transmitted by itself arrives at the destination fixed wireless terminal, and the destination fixed wireless terminal Creating configuration information having relationship information consisting of: and notifying the other fixed wireless terminal of the configuration information;
When the mobile station is an adjacent fixed wireless terminal that can directly communicate with the mobile wireless terminal, it creates fixed station management information having relationship information with another adjacent fixed wireless terminal, and the other fixed wireless terminal communicates with the adjacent fixed wireless terminal. A means of notifying the related information of
In the case of a source fixed wireless terminal, means for creating source management information having relationship information with an adjacent fixed wireless terminal;
Based on the configuration information, the fixed station management information, and the source management information , the data packet is transferred while being relayed between the fixed wireless terminals, so that the data packet is transferred to the destination fixed wireless terminal. Means for sending to
Means for transmitting and receiving data packets to and from the mobile radio terminal;
Means for deleting the fixed station management information and the source management information after a specific time has elapsed ,
The mobile radio terminal is
Receiving means for receiving a data packet broadcasted to the fixed wireless terminal while moving within a communicable range with any one of the fixed wireless terminals;
Means for creating mobile station management information having relationship information with an adjacent fixed wireless terminal that can communicate directly with itself based on the data packet, and notifying the adjacent fixed wireless terminal of the mobile station management information ; ,
Means for transmitting and receiving to and from the adjacent fixed wireless terminal based on the mobile station management information ;
Means for deleting the mobile station management information after elapse of a specific time . The fixed wireless terminal is
When transmitting a data packet addressed to the mobile wireless terminal, means for transmitting the data packet to another fixed wireless terminal at least once, including relay transfer,
Receiving a data packet having the mobile station management information from the mobile radio terminal, recognizing that the mobile radio terminal is in the vicinity, and creating the fixed station management information having relationship information with other adjacent fixed radio terminals Means to
Means for generating a data packet for transmission to be transmitted to the target fixed wireless terminal based on the data packet having the mobile station management information , and transmitting the data packet to the target fixed wireless terminal. The wireless communication network system according to claim 1. The mobile radio terminal is
When the necessity of data packet transmission to an arbitrary fixed wireless terminal arises, based on the data packet received from the adjacent fixed wireless terminal, the adjacent fixed wireless terminal is transferred as a first relay fixed wireless terminal. Means,
Means for detecting and recognizing the adjacent fixed wireless terminal,
The first relay fixed wireless terminal transfers the data packet to a target fixed wireless terminal by transferring the data packet while relaying between the plurality of fixed wireless terminals. Item 4. The wireless communication network system according to Item 1. In a wireless terminal that is configured by a plurality of wireless terminals that perform wireless data communication, and any of the wireless terminals can communicate with all other wireless terminals directly or through at least one other wireless terminal,
The plurality of wireless terminals include a movable mobile wireless terminal and a fixed wireless terminal having a fixed installation location,
By investigating other fixed wireless terminals that can communicate by broadcast transmission, a value relating to the minimum number of relays required until a data packet transmitted by itself arrives at the destination fixed wireless terminal, and the destination fixed wireless terminal Creating configuration information having relationship information consisting of: and notifying the other fixed wireless terminal of the configuration information;
When the mobile station is an adjacent fixed wireless terminal that can directly communicate with the mobile wireless terminal, it creates fixed station management information having relationship information with another adjacent fixed wireless terminal, and the other fixed wireless terminal communicates with the adjacent fixed wireless terminal. A means of notifying the related information of
In the case of a source fixed wireless terminal, means for creating source management information having relationship information with an adjacent fixed wireless terminal;
Based on the configuration information, the fixed station management information, and the source management information , the data packet is transferred while being relayed between the fixed wireless terminals, so that the data packet is transferred to the destination fixed wireless terminal. Means for sending to
Means for transmitting and receiving data packets to and from the mobile radio terminal;
Means for deleting the fixed station management information and the source management information after a specific time has elapsed ,
When transmitting the data packet to the mobile radio terminal, means for transmitting the data packet to another fixed radio terminal at least once, including relay transfer,
The mobile radio terminal receives a data packet having mobile station management information , which is information related to the adjacent fixed radio terminal that can communicate directly with the mobile radio terminal, and the mobile radio terminal is in the vicinity. Means for recognizing and creating the fixed station management information having relationship information with other adjacent fixed wireless terminals ;
Means for generating a transmission data packet to be transmitted to a target fixed wireless terminal based on the data packet having the mobile station management information and transmitting the data packet to the target fixed wireless terminal. Wireless terminal. In a wireless terminal that is configured by a plurality of wireless terminals that perform wireless data communication, and any of the wireless terminals can communicate with all other wireless terminals directly or through at least one other wireless terminal,
The plurality of wireless terminals include a movable mobile wireless terminal and a fixed wireless terminal having a fixed installation location,
Receiving means for receiving a data packet broadcasted to the fixed wireless terminal while moving within a communicable range with any one of the fixed wireless terminals;
Means for creating mobile station management information having relationship information with an adjacent fixed wireless terminal that can communicate directly with itself based on the data packet, and notifying the adjacent fixed wireless terminal of the mobile station management information ; Means for transmitting and receiving to and from the adjacent fixed wireless terminal based on the mobile station management information ;
Means for deleting the mobile station management information after elapse of a specific time ,
Means for transferring a data packet using the adjacent fixed wireless terminal as the first relay fixed wireless terminal based on the data packet received from the adjacent fixed wireless terminal at the time when the necessity of data packet transmission to an arbitrary fixed wireless terminal occurs When,
Means for detecting and recognizing the adjacent fixed wireless terminal;
With
Means for transferring the data packet to a target fixed wireless terminal by transferring the data packet while the first relay fixed wireless terminal relays between the plurality of fixed wireless terminals. A mobile radio terminal. In a wireless communication network system configured by a plurality of wireless terminals that perform wireless data communication, all of which can communicate with all other wireless terminals directly or through at least one other wireless terminal A wireless communication method to be executed, comprising:
The plurality of wireless terminals include a movable mobile wireless terminal and a fixed wireless terminal having a fixed installation location,
The fixed wireless terminal is
By investigating other fixed wireless terminals that can communicate by broadcast transmission, a value relating to the minimum number of relays required until a data packet transmitted by itself arrives at the destination fixed wireless terminal, and the destination fixed wireless terminal If the adjacent fixed wireless terminal is capable of communicating directly with the mobile wireless terminal, the configuration information having the relationship information is created, the configuration information is notified to the other fixed wireless terminal, and The fixed station management information having the relationship information is created, the relationship information with the adjacent fixed wireless terminal is notified to the other fixed wireless terminal, and if the fixed wireless terminal is the source, the relationship with the adjacent fixed wireless terminal Create sender management information with information,
Based on the configuration information, the fixed station management information, and the source management information , the data packet is transferred while being relayed between the fixed wireless terminals, so that the data packet is transferred to the destination fixed wireless terminal. To
Sending and receiving data packets to and from the mobile radio terminal;
Delete the fixed station management information and the transmission source management information after a specific time has elapsed,
When transmitting a data packet to the mobile radio terminal, the data packet is transmitted to another fixed radio terminal at least once, including relay transfer,
Receiving from the mobile radio terminal a data packet having mobile station management information , which is relation information with an adjacent fixed radio terminal that can communicate directly with the mobile radio terminal, and recognizing that the mobile radio terminal is in the vicinity And creating the fixed station management information having relationship information with other adjacent fixed wireless terminals ,
Create a data packet for transmission to be transmitted to the target fixed wireless terminal based on the data packet having the mobile station management information , and transmit to the target fixed wireless terminal,
The mobile radio terminal is
Receiving a data packet broadcasted to the fixed wireless terminal while moving within a communicable range with any one of the fixed wireless terminals;
Based on the data packet, create mobile station management information having relationship information with an adjacent fixed wireless terminal that can communicate directly with itself, notify the adjacent fixed wireless terminal of the mobile station management information ,
Send and receive data packets to and from the adjacent fixed wireless terminal based on the mobile station management information ,
When the necessity of data packet transmission to any fixed wireless terminal occurs, based on the data packet received from the adjacent fixed wireless terminal, the adjacent fixed wireless terminal is transferred as a first relay wireless terminal, and the data packet is transferred.
Relay radio terminal of the first is, by transferring the data packet while relaying the middle among the plurality of fixed wireless terminals, and transfers the data packets to the purpose of fixed wireless terminals addressed, the mobile after the lapse particular time A wireless communication method, wherein station management information is deleted . In a wireless communication network system configured by a plurality of wireless terminals that perform wireless data communication, all of which can communicate with all other wireless terminals directly or through at least one other wireless terminal A wireless communication program executable by a computer including a software program for executing a wireless communication method to be executed,
The plurality of wireless terminals include a movable mobile wireless terminal and a fixed wireless terminal having a fixed installation location,
The fixed wireless terminal is
By investigating other fixed wireless terminals that can communicate by broadcast transmission, a value relating to the minimum number of relays required until a data packet transmitted by itself arrives at the destination fixed wireless terminal, and the destination fixed wireless terminal If the adjacent fixed wireless terminal is capable of communicating directly with the mobile wireless terminal, the configuration information having the relationship information is created, the configuration information is notified to the other fixed wireless terminal, and The fixed station management information having the relationship information is created, the relationship information with the adjacent fixed wireless terminal is notified to the other fixed wireless terminal, and if the fixed wireless terminal is the source, the relationship with the adjacent fixed wireless terminal Create sender management information with information,
Based on the configuration information, the fixed station management information, and the source management information , the data packet is transferred while being relayed between the fixed wireless terminals, so that the data packet is transferred to the destination fixed wireless terminal. To
Sending and receiving data packets to and from the mobile radio terminal;
When transmitting the data packet to the mobile radio terminal, the data packet is transmitted to another fixed radio terminal at least once, including relay transfer,
Receiving from the mobile radio terminal a data packet having mobile station management information , which is relation information with an adjacent fixed radio terminal that can communicate directly with the mobile radio terminal, and recognizing that the mobile radio terminal is in the vicinity Then, the fixed station management information having the relationship information with other adjacent fixed wireless terminals is created , and the transmission data packet to be transmitted to the target fixed wireless terminal is created based on the data packet having the mobile station management information. And send it to the target fixed wireless terminal,
Delete the fixed station management information and the transmission source management information after a specific time has elapsed,
The mobile radio terminal is
Receiving a data packet broadcasted to the fixed wireless terminal while moving within a communicable range with any one of the fixed wireless terminals;
Based on the data packet, create mobile station management information having relationship information with an adjacent fixed wireless terminal that can communicate directly with itself, notify the adjacent fixed wireless terminal of the mobile station management information ,
Based on the mobile station management information , transmit and receive with the adjacent fixed wireless terminal,
When there is a need to transmit a data packet to an arbitrary fixed wireless terminal, the data packet is transferred with the adjacent fixed wireless terminal as the first relay fixed wireless terminal based on the data packet received from the adjacent fixed wireless terminal. ,
The first relay fixed wireless terminal transfers the data packet to the target fixed wireless terminal by transferring the data packet while relaying between the plurality of fixed wireless terminals.

A wireless communication program executable by a computer, including a software program for executing a wireless communication method for deleting the mobile station management information after a lapse of a specific time .

Images