JP3629259B2 - Wireless communication terminal, its control unit and communication control program - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a wireless communication terminal used in a broadband wireless communication system that performs data communication by wirelessly transmitting and receiving a high-frequency pulse signal as it is, for example, a communication system called UWB (Ultra Wide Band), its control unit, and communication It relates to the control program.
[0002]
[Prior art]
Currently, a technology for transmitting a large amount of data by radio using a wideband frequency band (wideband radio) is being studied against the background of an increase in the amount of information transmitted. Among them, a communication system using high-frequency pulses has been studied. This pulse communication system is a system in which a plurality of wireless communication terminals perform data communication with weak power using the same frequency at an arbitrary timing. For this reason, communication interference and congestion are likely to occur, which necessitates a transmission delay and a retransmission procedure, so that it is difficult to realize a desired transmission capacity.
[0003]
Therefore, various proposals have conventionally been made to solve such problems.
For example, there is a system in which a control station is provided in the system, and the data communication between wireless communication terminals is comprehensively managed by this control station. However, with this proposal, although it is possible to increase transmission efficiency, it is necessary to perform communication including control data in a radio signal, so that information data contains a lot of redundant components, resulting in a decrease in transmission speed. .
[0004]
On the other hand, a broadband transmission path and a narrowband transmission path are prepared in the system, and the broadband transmission path is used to transmit the downstream information data from the base station to the terminal, and the downstream data transmission by this broadband transmission path is narrowed. A system that controls using a band transmission path has been proposed (see, for example, Patent Document 1).
[0005]
In such a system, the control data is transmitted through a narrowband transmission path prepared separately from the wideband transmission path, so that the redundant component included in the information data can be reduced and the transmission rate can be maintained high. However, a narrow band transmission path for transmitting control data must be provided separately from a wide band transmission path for transmitting information data in one system, which requires a significant change in the system configuration.
[0006]
[Patent Document 1]
JP-A-8-331035
[0007]
[Problems to be solved by the invention]
As described above, in the conventionally proposed system, the redundant component of the information data increases to cause a substantial decrease in the transmission speed, and a new transmission path for transmitting control data is provided in the system. Therefore, there is a problem that the system configuration needs to be significantly changed.
[0008]
The present invention has been made paying attention to the above circumstances, and its object is to perform data communication using a pulse communication system without increasing redundant components of information data and without greatly changing the system configuration. It is to provide a wireless communication terminal, a control unit thereof, and a communication control program that enable simple and high-speed wireless data communication.
[0009]
[Means for Solving the Problems]
In order to achieve the above object, the present invention provides a radio frequency pulse signal in a radio communication terminal used in a first communication system in which a plurality of radio communication terminals perform data communication using the same frequency at an arbitrary timing. In addition to the first wireless circuit corresponding to the first communication system that performs data communication using the first wireless communication method for wireless transmission / reception, the wireless area of the first communication system is within its own wireless area. And a second wireless circuit corresponding to a second communication system that performs wireless communication using a second wireless communication system that is different from the first wireless communication system, and a scheduling control unit. Yes. Then, under the control of the scheduling control means, a schedule necessary for data communication of the first communication system is obtained by exchanging control signals with other wireless communication terminals using the second wireless circuit. It is intended to be managed.
[0010]
Therefore, according to the present invention, the control signal is transmitted using the wireless transmission path of the second communication system different from the first communication system for transmitting information data. For this reason, it is not necessary to multiplex and transmit the control data to the information data, thereby reducing the redundant component of the information data and increasing the substantial data transmission speed of the information data. Further, as the second communication system, another existing communication system independent of the first communication system is used as it is. For this reason, it is not necessary to change the system of the first communication system in order to transmit the control signal, and as a result, an inexpensive system can be provided.
[0011]
DETAILED DESCRIPTION OF THE INVENTION
(First embodiment)
FIG. 1 is a diagram for explaining a first embodiment of a radio communication terminal according to the present invention and is a schematic configuration diagram of a radio communication system in which the terminal is used.
[0012]
The wireless communication terminals TM1 to TM4 are terminals used in a pulse communication system called UWB (Ultra Wide Band) or the like, and have a function of performing data communication with each other using a pulse communication system. The wireless communication terminals TM1 to TM4 form wireless areas E1 to E4 whose sizes are determined by weak transmission power.
[0013]
On the other hand, an ad hoc network system forms a wireless area Z in the use area of the wireless communication terminals TM1 to TM4. The ad hoc network system is a wireless network system capable of direct communication between terminals such as Bluetooth (registered trademark) and wireless LAN. As the ad hoc network system, a system capable of forming a wireless area Z including all the wireless areas E1 to E4 of the wireless communication terminals TM1 to TM4 of the pulse communication system is selected.
[0014]
By the way, the wireless communication terminals TM1 to TM4 are configured as follows. FIG. 2 is a block diagram showing the configuration.
That is, the radio communication terminals TM1 to TM4 include an antenna 101 and a narrowband radio 102 for performing communication using an ad hoc network system in addition to the antenna 103 and the pulse radio 104 for pulse communication. The pulse radio 104 transmits / receives information data using a pulse communication system, and transmits / receives by a weak radio wave using a wide band of 3 to 10 GHz.
[0015]
The narrowband radio 102 transmits / receives a control signal for performing schedule management of data communication by the pulse communication system, and uses the digital modulation and spread spectrum technology such as QPSK (Quadrature Phase Shift Keying), for example. Send and receive control signals.
[0016]
The wireless communication terminals TM1 to TM4 include a control circuit 105a. The control circuit 105a includes an input unit 107 such as a keyboard, a display 108 using an LCD, a schedule storage circuit 201, a clock 202, and a waiting time calculation circuit. 203 is connected. Among these circuits, the control unit is constituted by the control circuit 105 a, the schedule storage circuit 201, the clock 202 and the waiting time calculation circuit 203.
[0017]
The schedule storage circuit 201 stores schedule information for managing the communication order of wireless communication terminals that have issued communication requests. The schedule information includes a communication queue and an attribute storage unit, and requests are registered in the communication queue in the order in which they are generated. The attribute storage unit stores the identification number of the wireless communication terminal corresponding to each request, the expected waiting time for data communication, and the like.
[0018]
The clock 202 is composed of a hardware clock circuit or a software timer, and clocks the current time and clocks a predetermined time according to an instruction from the control circuit 105a.
[0019]
The waiting time calculation circuit 203 calculates the waiting time of data communication for each request in accordance with an instruction from the control circuit 105a. It is also possible to calculate the data communication completion time and start time instead of the waiting time.
[0020]
The control circuit 105a has, for example, a microcomputer as a main control unit, and includes a control signal communication control function, a schedule management function, and a data communication control function as new functions related to the present invention. All of these control functions are realized by causing the microcomputer to execute a program.
[0021]
The control signal communication control function establishes synchronization with the ad hoc network system by controlling the narrowband radio 102. And the control signal required for schedule management is transmitted / received between other radio | wireless communication terminals.
[0022]
The schedule management function recognizes the generation time of a request based on the time stamp added to the communication request when a communication request occurs in the own terminal or a communication request arrives from another terminal. The requests are registered in the communication queue in the order of occurrence time. And it has a function which transmits the schedule information containing the communication queue after this registration to another radio | wireless communication terminal using the said narrowband radio | wireless machine 102. FIG.
[0023]
Further, the schedule management function gives the information about the scheduled transmission data amount and the transmission speed received together with the communication request to the waiting time calculation circuit 203, and calculates the waiting time of data communication corresponding to the request. The calculation result is displayed on the display 108 of the terminal itself, and also has a function of transmitting to another wireless communication terminal using the narrowband wireless device 102 and displaying it on the display.
[0024]
The data communication control function monitors whether or not the communication order of the own terminal has been reached based on the schedule information managed by the schedule management function. When recognizing that the communication order of the own terminal has been reached, the pulse wireless device 104 is used to wirelessly transmit information data with the communication partner terminal.
[0025]
Next, the operation of the wireless communication terminal configured as described above will be described. 3 and 4 are flowcharts showing the processing procedure and processing contents.
[0026]
When the power is turned on, the control circuit 105a first searches for a terminal having a function constituting the ad hoc network system in step 3a, and determines the presence or absence of it in step 3b. As a result of the search, if a terminal having a function that constitutes the ad hoc network system is not found, the process proceeds to step 3c, where it enters a standby state in the normal mode. The normal mode is a mode in which data communication is performed using only the pulse communication method. In the standby state in the normal mode, the control circuit 105a causes the clock 202 to measure a predetermined time in step 3d, and returns to step 3a and tries to search the ad hoc network system every time the predetermined time elapses.
[0027]
On the other hand, it is assumed that a wireless communication terminal having a function constituting an ad hoc network system is found by the search. In this case, after establishing synchronization with the wireless communication terminal, the control circuit 105a proceeds to step 3e, where it searches for other wireless communication terminals having a function of configuring an ad hoc network system in the vicinity. Based on the search result, the presence or absence of the corresponding terminal is determined in step 3f. As a result of the determination, if there is no corresponding terminal, the process proceeds to step 3g to enter a standby state. Further, in this standby state, the control circuit 105a causes the clock 202 to measure a certain time in step 3g, and returns to step 3e and tries to search for the corresponding terminal every time the certain time elapses. That is, the presence / absence of the corresponding terminal is confirmed after a while.
[0028]
As a result of the search, it is assumed that the corresponding terminal exists. In this case, the control circuit 105a sends the presence of its own terminal and its own terminal identification information (ID), for example, the MAC address and the IP address defined by IPv6 to the other wireless communication terminal in step 3h. 102 is used for notification. Then, when it is detected in step 3i that the narrowband wireless device 102 has received a response of presence confirmation from another wireless communication terminal, the identification information (ID) is received from the other wireless communication terminal in step 3j. . The received identification information of the other wireless communication terminal is stored in the terminal information storage area in the schedule storage circuit 201.
[0029]
In step 3k, the control circuit 105a transmits / receives schedule information to / from other wireless communication terminals whose existence is confirmed. The transmission and reception of this schedule information is also performed by the narrowband radio device 102. At this time, if the own terminal is the first wireless communication terminal that has joined the ad hoc network system, the schedule information created by the own terminal is transmitted to another wireless communication terminal. On the other hand, when there is a wireless communication terminal already subscribed to the ad hoc network system, schedule information is notified from the subscribed wireless communication terminal to the own terminal. The received schedule information is stored in a schedule storage area in the schedule storage circuit 201.
[0030]
In this state, the control circuit 105a monitors the generation of a request at step 4a. Here, the generation of a request in its own terminal and the reception of a request arriving from another wireless communication terminal via the narrowband transmission path of the ad hoc network system are monitored. Assume that a request transmitted by another wireless communication terminal is received by the narrowband wireless device 102. Then, the control circuit 105a proceeds to step 4b, where the schedule information update process is executed as follows.
[0031]
That is, if there is one incoming request, this request is added to the tail of the communication queue in the schedule storage circuit 201 as it is. On the other hand, when requests are received from a plurality of wireless communication terminals within a certain period, the time stamps attached to these requests are referred to and the generation times of the requests are compared. Then, based on the result of this comparison, each request is added to the communication queue in the order of occurrence time. That is, in this case, scheduling is performed in the order of early request generation time. If no time stamp is added to the request, the order may be determined based on the reception time of the request and registered in the communication queue.
[0032]
When the schedule information is updated in this way, the control circuit 105a transmits the updated schedule information from the narrowband wireless device 102 to another wireless communication terminal in step 4c. On the other hand, when the updated schedule information arrives from another wireless communication terminal, the control circuit 105a updates the schedule information in the schedule storage circuit 201 based on the schedule information received by the narrowband wireless device 102. .
[0033]
Further, in step 4d, the control circuit 105a gives an instruction to the waiting time calculation circuit 203 based on the scheduled transmission data amount and transmission speed stored for each request in the updated schedule information. The waiting time of data communication corresponding to the is calculated. Then, the newly calculated waiting time information is displayed on the display 108 of the own terminal in step 4e, and is transmitted from the narrowband radio 102 to another wireless communication terminal in step 4f. Is also displayed. Note that as the waiting time information, a communication end time of data communication during communication, a communication start time of data communication to be communicated by the own terminal, or a waiting time until the communication start time are appropriate.
[0034]
Thereafter, similarly, each time a request is generated, the schedule information is updated based on the generation time. At this time, various control data including requests for managing schedule information are all transmitted / received by the narrowband radio 102 using the ad hoc network system.
[0035]
The control circuit 105a of each of the wireless communication terminals TMM1 to TM4 monitors the data communication start timing of the own terminal based on the schedule information, and performs communication using the pulse radio device 104 when the data communication start timing of the own terminal comes. Data communication is started with the partner wireless communication terminal. When the data communication ends, the corresponding request in the schedule information is deleted.
[0036]
As described above, in the first embodiment, in addition to the radio device 104 and the antenna 103 for pulse communication, a narrowband radio device 102 and an antenna 101 that use an ad hoc network system are provided, and this narrowband radio device 102 is used. Then, control data such as a request is transmitted and received between the wireless communication terminals TM1 to TM4, thereby updating the schedule information for data communication. Then, according to the updated schedule information, data communication using the pulse communication method is executed.
[0037]
Therefore, according to this embodiment, control data for schedule management is transferred using an ad hoc network system without using a pulse communication system. For this reason, schedule management can be performed without increasing redundant components of data communication using pulse communication, and thereby the efficiency of data communication can be kept high. In addition, since the control data is transferred using an existing ad hoc network system that exists separately from the pulse communication system, it is not necessary to change the system of the pulse communication system itself, thereby simplifying data communication using the pulse communication system. It can be realized at low cost.
[0038]
Furthermore, in the first embodiment, for each request, the communication waiting time of other requests is calculated and displayed based on the estimated transmission data amount and transmission speed of the data communication. For this reason, each terminal user can recognize or predict the data communication start timing of the own terminal, and thereby the user's stress is greatly reduced.
[0039]
(Second Embodiment)
According to the second embodiment of the present invention, when updating the schedule information, the rank for the request is determined in consideration of the wireless transmission quality of the corresponding terminal in addition to the request generation time, and thereby the request generation time is shortened. In addition, data communication is preferentially started from a wireless communication terminal having a good wireless transmission quality.
[0040]
FIG. 5 is a block diagram showing a configuration of a wireless communication terminal according to the second embodiment of the present invention. In the figure, the same parts as those in FIG.
[0041]
The wireless communication terminals TM1 to TM4 of this embodiment are provided with an error rate measuring device 106. This error rate measuring device 106 is used to determine the quality of the wireless transmission path with the communication partner wireless communication terminal, and is an error rate of known measurement data transmitted from the communication partner wireless communication terminal. Measure.
[0042]
When the schedule information update process is performed, the control circuit 105b first divides a plurality of requests issued in the same time period into a plurality of small time periods. Next, for each of these small time zones, the wireless transmission path quality with the wireless communication terminal that transmitted the request is determined, and according to the determination result, priority is given to the requests in the order of good transmission path quality. The request is registered in the communication queue according to the rank.
[0043]
Next, operations of the radio communication terminals TM1 to TM4 configured as described above will be described. FIG. 6 is a flowchart showing the processing procedure and processing contents of the schedule information update processing as the main part.
[0044]
In step 4a in FIG. 4, when a plurality of requests are generated in the same time period, the control circuit 105b first stores the plurality of requests in a plurality of small time periods in step 6a. Then, the wireless transmission error rate of the corresponding wireless communication terminal is measured in the following manner in step 6b for each small time period.
[0045]
That is, when measuring the error rate, an instruction is sent to the counterpart wireless communication terminal to transmit a known signal, and by detecting how much error this known signal was received in, it is done. The However, since the known signal has no information, the data is redundant.
[0046]
Therefore, in the present embodiment, the same known signal is received by both the narrowband radio circuit 102 and the pulse radio circuit 104, thereby making it unnecessary to transmit the known signal necessary for measuring the error rate in data transmission.
[0047]
That is, first, a part of a known signal to be transmitted from the pulse radio circuit 104 is transmitted by the narrowband radio circuit 102 so that the error rate is as small as possible. For example, the data is repeatedly sent to the communication partner wireless communication terminal. The wireless communication terminal on the receiving side of the known signal receives the known signal by the narrowband wireless circuit 102. The base signal received at this time is a signal with a small data error. Next, the known signal data received by the narrowband radio circuit 102 is compared with the same known signal data received by the pulse radio circuit 104. Then, the error rate in the pulse radio circuit 104 is evaluated based on the comparison result.
[0048]
Note that the error rate can be measured by intercepting a known signal transmitted / received between other wireless communication terminals even if the terminal itself is not communicating. However, in this case, it is necessary to transmit a request for transmitting known signal data for evaluating the error rate to the transmission source wireless communication terminal using the narrowband wireless circuit 102. Further, by using such a method, it is possible to examine the reception state characteristics over a relatively long time, and as a result, it is possible to evaluate a highly accurate error rate.
[0049]
When the error rate of the wireless communication terminal corresponding to each request is measured, the control circuit 105b next proceeds to step 6c, where the measured error rate is ascending order, that is, the transmission path quality. Give priority to each request in the order that is good. Then, according to the determined priority order, each request is added to the communication queue in the schedule storage circuit 201 in step 6d.
[0050]
As described above, in the second embodiment, when updating the schedule information, requests generated in the same time period are divided into a plurality of small time periods, and the transmission error rate of the corresponding terminal is measured for each of these small time periods. To do. Based on the measurement result of the error rate, priorities are given to the requests in the order of good transmission quality, and the requests are added to the communication queue according to the determined priorities.
[0051]
Therefore, according to this embodiment, data communication is preferentially performed from a wireless communication terminal having good transmission quality, and as a result, the waiting time of the terminal arranged behind the communication queue is reduced, Efficient pulse data communication can be realized as a system. In addition, it is possible to improve the transmission quality for terminals with many errors.
[0052]
(Third embodiment)
In the third embodiment of the present invention, when updating the schedule information, the wireless transmission quality of the corresponding terminal is considered in addition to the time when the request is generated, and the order for the request is determined in consideration of the amount of data scheduled for transmission. Thus, data communication is preferentially started from a wireless communication terminal having a request generation time earlier, good wireless transmission quality, and a small amount of data to be transmitted.
[0053]
FIG. 7 is a flowchart showing the procedure and contents of schedule update processing by the wireless communication terminal according to this embodiment. In the figure, the same parts as those in FIG.
[0054]
In step 4a in FIG. 4, when a plurality of requests are generated in the same time period, the control circuit 105b first stores the plurality of requests in a plurality of small time periods in step 6a. At the same time, the control circuit 105b stores the scheduled transmission data amount attached to the request in step 7a in association with the classified request.
[0055]
Next, the control circuit 105b measures the radio transmission error rate of the corresponding radio communication terminal in step 6b for each small time period. This error rate measurement can be similarly performed by the method described in the second embodiment. When the error rate of the terminal for each request is obtained, the control circuit 105b subsequently proceeds to step 7b, where the requests are classified into a plurality of transmission quality groups based on the error rate.
[0056]
Subsequently, the control circuit 105b proceeds to step 7c, where priority is given to the request for each transmission quality group in the order of decreasing the scheduled transmission data amount according to the stored scheduled transmission data amount. Then, according to the determined priority order, each request is added to the communication queue in the schedule storage circuit 201 in step 7d.
[0057]
As described above, in the third embodiment, when updating the schedule information, requests generated in the same time period are divided into a plurality of small time periods, and the transmission error rate of the corresponding terminal is measured for each of these small time periods. To do. Then, based on the measurement result of this error rate, the above requests are divided into a plurality of transmission quality groups, and each of these transmission quality groups is given a priority in the order of the amount of data scheduled to be transmitted. Each request is added to the communication queue according to the priority.
[0058]
Therefore, according to this embodiment, data communication is preferentially performed from a wireless communication terminal having good transmission quality and a small amount of scheduled data to be transmitted, and as a result, the request is transmitted wirelessly arranged behind the communication queue. By further reducing the waiting time of the communication terminal, efficient pulse data communication can be realized as the entire system.
[0059]
(Other embodiments)
In the third embodiment, in the schedule update process, the priority for the request is determined based on the request occurrence time, the transmission path error rate of the terminal, and the transmission planned data amount. However, the present invention is not limited to this. For example, the priority order may be determined for the request based on the request generation time and the amount of data to be transmitted.
[0060]
In each of the above embodiments, scheduling is performed with the request generation time or reception time as the first priority, but scheduling may be performed with the radio transmission quality or the scheduled transmission data amount as the first priority. Furthermore, when the request is a request for data communication that does not require real-time properties, such as e-mail transmission / reception or information download, for example, based on at least one of wireless transmission quality and scheduled transmission data amount Scheduling may be performed.
[0061]
Further, in each of the embodiments, the case where each wireless communication terminal has a scheduling function has been described. However, one wireless communication terminal may be configured to collectively process scheduling of all wireless communication terminals.
[0062]
In addition, the type of ad hoc network system, the configuration of the wireless communication terminal, the procedure and contents of schedule update processing, and the like can be variously modified and implemented without departing from the scope of the present invention.
[0063]
【The invention's effect】
As described above in detail, according to the present invention, in addition to the first wireless circuit corresponding to the first communication system that transmits information data using the pulse communication method, the wireless area of the first communication system is set as the self-communication area. A second wireless circuit corresponding to a second communication system that performs wireless communication using a modulation communication method that is different from the pulse communication method, and a control unit that controls a communication schedule. Provided. Then, under the control of the control means, the second wireless circuit performs control of schedules necessary for data communication of the first communication system by exchanging control signals with other wireless communication terminals. I am doing so.
[0064]
Therefore, according to the present invention, it is possible to perform data communication using the pulse communication method without increasing the redundant component of the information data and without significantly changing the system configuration. It is possible to provide a wireless communication terminal that enables data communication, a control unit thereof, and a communication control program.
[Brief description of the drawings]
FIG. 1 is a schematic configuration diagram of a wireless communication system in which a wireless communication terminal according to the present invention is used.
FIG. 2 is a block diagram showing a configuration of a wireless communication terminal according to the first embodiment of the present invention.
FIG. 3 is a flowchart showing a processing procedure of the operation of the wireless communication terminal shown in FIG.
4 is a flowchart showing the processing procedure of the operation of the wireless communication terminal shown in FIG. 2 and the latter half of the processing content.
FIG. 5 is a block diagram showing a configuration of a wireless communication terminal according to a second embodiment of this invention.
6 is a flowchart showing the procedure and contents of schedule information update processing by the wireless communication terminal shown in FIG. 5;
FIG. 7 is a flowchart showing the procedure and contents of schedule update processing by a wireless communication terminal according to a third embodiment of the present invention.
[Explanation of symbols]
TM1 to TM4 ... Wireless communication terminals
E1 to E4: Wireless area for pulse communication formed by wireless communication terminals
Z: Wireless area of ad hoc network system
101. Antenna for narrowband communication
102: Narrow band radio
103. Antenna for pulse communication
104 ... pulse radio
105a, 105b ... control circuit
106: Error rate measurement circuit
107: Input unit
108 ... Display
201 ... Schedule memory circuit
202 ... Clock
203 ... Latency calculation circuit

Claims (9)

In the wireless communication terminal used in the first communication system in which a plurality of wireless communication terminals perform data communication using the same frequency at an arbitrary timing,
A first wireless circuit corresponding to the first communication system for performing data communication using a first wireless communication method for wirelessly transmitting and receiving a high-frequency pulse signal;
Corresponding to a second communication system that includes a wireless area of the first communication system in its own wireless area and performs wireless communication using a second wireless communication method different from the first wireless communication method. A second radio circuit;
Control means for performing schedule management necessary for data communication of the first communication system by exchanging control signals with other wireless communication terminals by the second wireless circuit; Wireless communication terminal. The wireless communication terminal according to claim 1, wherein the second communication system is an existing ad hoc wireless network system including the wireless area of the first communication system in its own wireless area. The control means includes
Storage means for storing a communication queue;
Control signal communication control means for transferring a data communication request between wireless communication terminals by the control signal;
Each time the request is transferred by the control signal communication control means, a schedule management means for registering the requests in the communication queue in the order of generation thereof;
The wireless communication terminal according to claim 1, further comprising data communication control means for executing data communication of the first communication system in accordance with a registration order of requests in the communication queue. The control means includes
Storage means for storing a communication queue;
Determining means for determining wireless transmission quality related to data communication between the wireless communication terminals;
Control signal communication control means for transferring a data communication request between wireless communication terminals by the control signal;
When a plurality of requests are transferred by the control signal communication control means, the plurality of requests are generated based on the occurrence time of the plurality of requests and the wireless transmission quality of the corresponding wireless communication terminal determined by the determination means. Schedule management means for determining the priority of the request and registering the request in the communication queue according to the priority;
The wireless communication terminal according to claim 1, further comprising data communication control means for executing data communication of the first communication system in accordance with a registration order of requests in the communication queue. The control means includes
Storage means for storing a communication queue;
A control signal communication control means for transferring a request for data communication and an amount of data to be transmitted between wireless communication terminals by the control signal;
When a plurality of requests are transferred by the control signal communication control means, a priority order of the plurality of requests is determined based on an occurrence time of the plurality of requests and an amount of data scheduled to be transmitted, and the request is determined according to the priority order. A schedule management means for registering the information in the communication queue;
The wireless communication terminal according to claim 1, further comprising data communication control means for executing data communication of the first communication system in accordance with a registration order of requests in the communication queue. The control means includes
Storage means for storing a communication queue;
Determining means for determining wireless transmission quality related to data communication of the wireless communication terminal;
A control signal communication control means for transferring a request for data communication and an amount of data to be transmitted between wireless communication terminals by the control signal;
When a plurality of requests are transferred by the control signal communication control means, the generation time of the requests and the scheduled transmission data amount, and the wireless transmission quality of the corresponding wireless communication terminal determined by the determination means Based on a schedule management means for determining a priority order of the plurality of requests and registering the request in the communication queue according to the priority order;
The wireless communication terminal according to claim 1, further comprising data communication control means for executing data communication of the first communication system in accordance with a registration order of requests in the communication queue. The control means includes
Estimating means for estimating information representing the waiting time of data communication for each request from the scheduled transmission amount of data communication corresponding to the request registered in the communication queue and its transmission speed;
Informing means for informing the terminal user of information representing the waiting time estimated by the estimating means during the data communication waiting period,
The wireless communication terminal according to claim 3, further comprising: A first wireless circuit corresponding to a first communication system that performs data communication using a first wireless communication method that wirelessly transmits and receives a high-frequency pulse signal, and a wireless area of the first communication system is within its own wireless area And a second wireless circuit corresponding to a second communication system that performs wireless communication using a second wireless communication method different from the first wireless communication method. A control unit,
Means for controlling the operation of the second radio circuit so as to exchange control signals with other radio communication terminals using the second radio communication method;
Means for managing a schedule of data communication by the wireless communication terminal based on the received control signal;
A control unit for a radio communication terminal, comprising: means for controlling an operation of the first radio circuit so that data communication of the first communication system is executed according to the managed schedule. A first wireless circuit corresponding to the first communication system that performs data communication using a first wireless communication method that wirelessly transmits and receives a high-frequency pulse signal, and a wireless area of the first communication system is defined as a self wireless area And a second wireless circuit corresponding to a second communication system that performs wireless communication using a second wireless communication system different from the first wireless communication system, and the first and second A communication control program used in a wireless communication terminal provided with a computer for controlling a wireless circuit,
A process for controlling the operation of the second radio circuit so as to exchange a control signal with another radio communication terminal using the second radio communication method;
A process for managing a schedule of data communication by the wireless communication terminal based on the received control signal;
A communication control program for causing the computer to execute processing for controlling the operation of the first wireless circuit so as to cause data communication of the first communication system to be executed according to the managed schedule.

Images