JP2000333249A - Radio communication access system and recording medium therefor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a radio communication access system that allows a base station to connect to a specific mobile radio with higher probability and to provide recording medium therefor. SOLUTION: A status flag generating section 6 generates a status flag which enables a connection request only to a mobile radio belonging to a specific group as an idle signal and a transmission section 4 transmits the idle signal to each mobile radio. A data processing section 2 gives a connection permission to one mobile radio that transmits the connection request in response to the idle signal via a transmission section 4.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a radio communication access system for establishing a connection with a base station in response to a connection request transmitted from a plurality of mobile radios, and a recording medium therefor.

[0002]

2. Description of the Related Art Conventionally, portable telephones and PHSs (Personal
In a wireless communication system such as a handy-phone system, exchange between a base station and each mobile wireless device is performed in frame units. Also, a time slot for a downlink signal transmitted from the base station to each mobile radio device (hereinafter referred to as a downlink signal slot) within one frame time, and a time slot for an uplink signal transmitted from each mobile radio device to the base station. (Hereinafter referred to as an uplink signal slot), and the idle signal and the connection request described above are transmitted and received in each slot.

[0003] When all communication channels are in use, the base station sends a busy signal to each mobile radio device.
When a communication channel is idle, an idle signal is transmitted in a downlink signal slot. On the other hand, each mobile radio, when the operation of the communication start is performed by the user, first, it is determined whether or not the idle signal transmitted from the base station has been received, if the idle signal can be received, A connection request is placed in an uplink signal slot following the downlink signal slot and transmitted to the base station.

[0004] Then, in response to an idle signal transmitted in a certain downlink signal slot from the base station, in a subsequent uplink signal slot, for example, if there is a connection request from only one mobile radio, the base station will: The connection permission is given to the mobile radio. Thereby, the mobile radio device to which the connection permission has been given can establish a connection with the base station.

[0005] In addition, in response to an idle signal transmitted in a certain downlink signal slot, a plurality of terminals simultaneously request connection in the subsequent uplink signal slot. It is not possible to individually discriminate the uplink signals sent from the mobile terminal, so that connection permission cannot be given to any mobile radio. As a result, a random number is generated in each mobile wireless device, a probability is obtained based on the random number, and a connection request is transmitted to the base station again in the uplink signal slot of the next frame according to the probability.

As described above, in the conventional wireless communication system, when connection requests are transmitted from a plurality of mobile radios to the base station at the same time, the timing of the connection request to be retransmitted is shifted between the mobile radios. In this way, a plurality of connection requests are not generated at the same time.

[0007]

When a plurality of mobile radios make a connection request at the same time in the above-mentioned radio communication system, a connection request is transmitted again in the next frame, and as a result, a connection is established. The possibilities are all in each mobile radio. However, in other words, this means that a connection cannot be reliably established even when it is desired to connect immediately, such as in an emergency. Also, some users wish to have more chances to establish a connection with the base station as much as possible, even at the expense of extra costs.

[0008] The present invention has been made in view of such circumstances, and provides a radio communication access system and a recording medium that can connect a specific mobile radio to a base station with higher probability. It is intended to provide. It is still another object of the present invention to provide a wireless communication access system in which a plurality of terminals are divided into a plurality of groups in advance, and the probability of being able to connect to a base station is different for each group, and a recording medium therefor.

[0009]

The invention according to claim 1 comprises a base station and a plurality of mobile radios, and establishes a connection with the base station in response to a connection request transmitted from the mobile radio. In the wireless communication access system to be established, the base station includes, among a plurality of predetermined groups, a specific idle signal that enables transmission of a connection request only to mobile radio devices belonging to a specific group; Any of the general idle signals that enable transmission of the connection request to all of the mobile wireless devices, an idle signal transmitting unit that transmits based on predetermined conditions, and an idle signal transmitted from the idle signal transmitting unit. Responsively, when a connection request is received from only one of the plurality of mobile radios, a connection permitting means for permitting connection to the mobile radio. It is characterized by comprising a.

According to the first aspect of the present invention, a specific idle signal enabling transmission of a connection request to only a mobile radio device belonging to a specific group is transmitted, and the connection request is transmitted in response to the specific idle signal. Since the connection permission is given to the one mobile wireless device, it is possible to connect the specific mobile wireless device to the base station with higher probability.

According to a second aspect of the present invention, in the wireless communication access system according to the first aspect, the idle signal transmitting means assigns a priority order to each of the plurality of groups, and gives the highest priority among the plurality of groups. A first specific idle signal enabling transmission of a connection request only to mobile radios belonging to a group having a higher priority, and a mobile radio belonging to a group excluding the group having the highest priority and the group having the lowest priority A second specific idle signal allowing only the device to transmit a connection request;
One of the general idle signals is transmitted based on a predetermined condition.

According to the second aspect of the present invention, the mobile radios belonging to the group having the highest priority transmit a connection request to the base station according to the first and second specific idle signals and the general idle signal. Will be. In addition, mobile radios belonging to groups other than the group with the highest priority and the group with the lowest priority transmit a connection request to the base station according to the second specific idle signal and the general idle signal. Further, the group with the lowest priority transmits a connection request to the base station only in response to the general idle signal. This makes it possible to vary the probability of connection with the base station for each group.

According to a third aspect of the present invention, in the wireless communication access system according to the first aspect, the idle signal transmitting means is configured such that the idle signal transmitted last time is a general idle signal, and the mobile radio signal is accordingly transmitted. If the connection requests transmitted from the mobile device do not collide with each other, a general idle signal is transmitted as an idle signal to be transmitted this time, the previously transmitted idle signal is a general idle signal, and transmitted from the mobile radio device accordingly. When the requested connection requests collide with each other, a specific idle signal is transmitted as an idle signal to be transmitted this time, and the previously transmitted idle signal is a specific idle signal, and the connection requests transmitted from the mobile wireless device in response thereto. If did not collide,
If a general idle signal is transmitted as the idle signal to be transmitted this time, and the previously transmitted idle signal is a specific idle signal, and the connection requests transmitted from the mobile wireless devices collide accordingly, the specific idle signal is again transmitted. Is transmitted.

According to the third aspect of the present invention, when the previously transmitted idle signal is the specific idle signal, and the connection requests transmitted from the mobile wireless devices collide with each other, the specific idle signal is again transmitted. Because it sends a signal,
When a specific idle signal is transmitted from the base station, connection permission can be reliably given to mobile radio devices belonging to a specific group.

According to a fourth aspect of the present invention, in the wireless communication access system according to the third aspect, the idle signal transmitting means determines that the idle signal transmitted last time is a specific idle signal, and the mobile wireless device is accordingly operated. When the connection requests transmitted from the RPs collide with each other and the specific idle signal is transmitted again a predetermined number of times, a general idle signal is transmitted.

According to the fourth aspect of the present invention, the idle signal transmitted last time is the specific idle signal, and the connection requests transmitted from the mobile radios collide with each other in response to the specific idle signal. Is transmitted a predetermined number of times, a general idle signal is transmitted, so that it is possible to avoid eliminating any chance of connection to a mobile radio device that does not belong to a specific group.

[0017] The invention according to claim 5 is the invention according to claims 1 to 4.
In the wireless communication access system according to any one of the above, the mobile radio device, from among the plurality of groups, a group setting unit in which a group to which the own device belongs is set, and an idle signal transmission unit of the base station. When an idle signal is received, the received idle signal is analyzed to determine a group to which the transmission of a connection request is permitted, and a comparison is made with the group to which the own device belongs to the group setting unit. Determining means for determining whether or not the request can be transmitted; and determining that the connection request has been transmitted by the determining means, and when the user of the terminal has instructed the connection to the base station, Connection request transmitting means for transmitting a connection request to the station.

According to the fifth aspect of the present invention, when each mobile radio device receives an idle signal from the base station, each mobile radio device transmits a connection request according to the group to which its own device set by the group setting means belongs and the received idle signal. If it is determined that the own device can transmit a connection request by comparing the group with which transmission is permitted, a connection request is transmitted to the base station. As a result, each mobile wireless device can transmit a connection request for an idle signal corresponding to a group to which each mobile wireless device belongs.

According to a sixth aspect of the present invention, there is provided a computer-readable recording medium recording a wireless communication access control program for establishing a connection with a base station in response to a connection request transmitted from a plurality of mobile wireless devices. Out of a plurality of predetermined groups, a specific idle signal that enables transmission of a connection request only to mobile radio devices belonging to a specific group, and a connection request for all of the plurality of mobile radio devices. A function of transmitting any one of general idle signals enabling transmission to the mobile radio device based on a predetermined condition; and a function of transmitting one of the plurality of mobile radio devices according to the transmitted idle signal. Wireless communication access control for realizing the function of granting a connection permission to the mobile wireless device when the connection request is received only from the wireless device. A computer-readable recording medium recording a program.

According to the sixth aspect of the present invention, the wireless communication access control program provides a computer with a specific idle signal that enables a computer to transmit a connection request only to mobile radios belonging to a specific group. Let me send
In response to this, connection permission is given to one mobile wireless device that has transmitted the connection request, so that a specific mobile wireless device can be connected to the base station with higher probability.

[0021]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of a wireless communication access system according to the present invention will be described below with reference to the drawings. The wireless communication access system according to the present embodiment includes:
The base station comprises a base station and a plurality of mobile radios,
Controlling data exchange between an external terminal (for example, a server connected to the Internet, another base station connected to a dedicated line, etc.) and the mobile radio, and when a connection request is issued from the mobile radio Gives a connection permission to the mobile radio according to the situation, and establishes a connection with the mobile radio.

Each of the plurality of mobile radios includes a group A having the highest possibility of establishing a connection when a connection request is transmitted to the base station, and a group A having a group A, according to a contract with a communication company. The group is divided into three groups, a group B having a high possibility of establishing a connection next and a group C having a high possibility of establishing a connection after the group B.

The channel configuration used for communication between the base station and the mobile radio includes a control channel used for transmitting control information related to communication such as a connection request and a call request, a mobile channel and an external terminal. And a communication channel used for transmitting data exchanged between the control channel and the communication channel. The control channel and the communication channel use the same frequency. The base station employs a half-duplex communication system of a duplex system, and the mobile radio employs a half-duplex communication system of a simplex system. Further, it is assumed that the mobile wireless device constantly detects a downlink signal transmitted from the base station, and transmits the downlink signal to the base station as needed.

Here, the exchange of data between the base station and the mobile radio is performed by framed data, and the frame format of this data is shown in FIG. The format shown in this figure is, in order from the top of the frame, a synchronization word UW (Unique Word), a radio control channel RCCH (Radio Control CHannel), a common control channel CCCH (Common Control CHannel), or a user packet channel UPCH (User Packet CHannel).
It consists of three areas.

Here, the synchronization word UW is a bit string having a specific value used for establishing frame synchronization. The radio control channel RCCH includes a status flag indicating a line use state (idle or busy) in the base station, and information (ID) for specifying a transmission destination mobile radio of data transmitted from an external terminal. , And information on the subsequent common control channel CCCH or user packet channel UPCH, and the like.

Here, the status flag included in the radio control channel RCCH is, for example, a bit F0 (L
It consists of five bits SB) to F4 (MSB), and indicates the use state (idle or busy) of the communication line according to the value (details will be described later). The radio control channel RCCH transmitted from the base station is received by all mobile radios. The status flag is not limited to 5 bits, but may be 2 bits or more.

The common control channel CCCH includes control information such as a call request and a connection request in the mobile radio,
In addition, information on the data length of the data transmitted by the mobile wireless device and the like are carried. Further, the user packet channel UP
The data exchanged between the external terminal and the mobile wireless device via the base station is loaded on the CH.

Next, the configuration of the above-described base station and mobile radio will be described with reference to FIGS. here,
FIG. 2 is a block diagram showing the configuration of the base station, and FIG. 3 is a block diagram showing the configuration of the mobile radio. First, in FIG. 2, the receiving unit 1 receives a radio signal (transmission packet) transmitted from the mobile radio, and outputs the received data. The data processing unit 2 performs various controls according to the contents of the radio control channel RCCH and the common control channel CCCH included in the reception data output from the reception unit 1.

For example, the common control channel C
If the CCH is included, the content is analyzed, and if a connection request is included, a connection permission is output according to the use state of the line. When data transmitted from an external terminal (not shown) addressed to the mobile wireless device via the input / output unit 3 is received, information identifying the mobile wireless device as the transmission destination included in the data is analyzed. Then, the radio control channel RCCH of the data frame to be transmitted includes the I
Place D. Then, the data received from the external terminal is loaded on the user packet channel UPCH and output to the transmitting unit 4.

Further, when the transmission data from the mobile radio to the external terminal is received, information for specifying the external terminal of the transmission destination is obtained from the contents of the radio control channel RCCH, and the information is loaded on the subsequent user packet channel UPCH. The data is transmitted to the external terminal via the input / output unit 3. When the connection request sent from the mobile wireless device is correctly received (a plurality of connection requests did not collide), a connection permission is transmitted to the mobile wireless device via the transmission unit 4. When connection requests collide, that is, when connection requests are received from a plurality of mobile wireless devices at the same time, the received connection requests are duplicated and are not correctly received.

The connection request detecting unit 5 applies a common control channel CCC to the data input from the receiving unit 1 to the data processing unit 2.
H and its common control channel CCC
If the connection request is included in H, the connection request is detected and the status flag generation unit 6 is notified of the connection request from the mobile wireless device. The status flag generator 6 generates a status flag according to the status of the communication line, and transmits the status flag.
Output to

Here, the contents of the status flag generated by the status flag generator 6 will be described with reference to FIG. First, when there is no free communication line, the status flag generator 6 sets the busy signal to “00”.
000 "(binary number; the same applies hereinafter). When the communication line changes from an empty state to an empty state, the status flag generating unit 6
The idle signal G (the value of the status flag: “11111”) and the idle signal A according to the conditions listed below
(The value of the status flag: “11100”), or
Idle signal B (status flag value: “0011”
1 ") and outputs it to the transmission unit 4.

(Condition 1) If the previously generated idle signal is the idle signal G and the connection requests transmitted from the mobile radios do not collide with each other, the idle signal G is generated again. (Condition 2) The previously generated idle signal is the idle signal G
When the connection requests transmitted from the mobile wireless devices collide with each other, an idle signal A is generated.

(Condition 3) If the idle signal generated last time is the idle signal A and the connection requests transmitted from the mobile radios do not collide with each other, the idle signal B is generated. (Condition 4) The idle signal generated last time is the idle signal A
If the connection requests transmitted from the mobile radio device collide with each other, the idle signal A is generated again.

(Condition 5) When the previously generated idle signal is the idle signal B and the connection requests transmitted from the mobile radios do not collide with each other, the idle signal G is generated. (Condition 6) The idle signal generated last time is the idle signal B
If the connection requests transmitted from the mobile radio devices collide with each other, the idle signal B is generated again.

(Condition 7) When the state of (Condition 4) is repeated a predetermined number of times, an idle signal B is generated. (Condition 8) When the state of (Condition 6) is repeated a predetermined number of times, an idle signal G is generated.

The above-mentioned idle signal G is an idle signal which enables transmission of a connection request to all the mobile radios belonging to the groups A, B and C.
Further, the idle signal A is an idle signal that enables transmission of a connection request only to mobile radio devices belonging to the group A. Further, the idle signal B is
This is an idle signal that enables transmission of a connection request to mobile radios belonging to both of B and B.

When outputting the idle signal to the transmitting unit 4, the status flag generating unit 6 outputs a timing start signal to the timeout monitoring unit 7. Thereby, the timeout monitoring unit 7 measures a predetermined time (the time from when the base station starts transmitting the frame data to when the frame data transmitted from the mobile radio should be received), and When the time elapses, a timeout signal is output to the status flag generator 6. The transmission unit 4 configures the frame shown in FIG. 1 based on the data output from the data processing unit 2 and the status flag generation unit 6 and transmits a radio signal to the mobile wireless device.

Next, the configuration of the mobile radio will be described with reference to FIG. First, the receiving unit 10 receives a radio signal transmitted from a base station and outputs it as received data. The reception data analysis unit 11 analyzes the reception data output from the reception unit 10 and determines whether the data is data transmitted to the own device. If the data is addressed to the own device, the data is output to the control information analysis unit 12.

The control information analysis unit 12 analyzes the data output from the reception data analysis unit 11, and
The received data is output to a data processing system (not shown) that performs processing for showing the transmitted data to the user.
If no call is being made, the status flag included in the radio control channel RCCH is transmitted to the status flag analysis unit 1.
Output to 3. The status flag analysis unit 13 analyzes the status flag, determines whether the signal is a busy signal or an idle signal, and if the signal is an idle signal, determines whether the signal is any of the idle signals A, B, and G. .

In the group registration setting section 14, a group (any of A, B, and C) to which the terminal belongs is set according to, for example, the contents of a contract with a communication company. When the status flag analysis unit 13 determines that the status flag indicates a busy signal, the access determination processing unit 15 determines that the connection request cannot be output. Further, when it is determined that the request signal indicates an idle signal, the group to which the own device belongs set in the group registration setting unit 14 is compared with the type of the idle signal determined by the status flag analysis unit 13, and a connection request is determined. It is determined whether or not can be output.

That is, when the group to which the terminal belongs belongs to the group A, the connection request can be output when the type of the idle signal determined by the status flag analyzer 13 is any of A, B, and G. It is determined that there is. When the group to which the terminal belongs is group B, when the type of the determined idle signal is B or G,
It is determined that the connection request can be output. Further, when the group to which the terminal belongs is group C, it is determined that the connection request can be output only when the type of the determined idle signal is G.

The retransmission processing unit 16 transmits a connection request transmitted from the own device to the base station in response to an idle signal other than the idle signal G (idle signals A and B in the present embodiment) from another mobile radio device. Conflicts with the connection request
A random number is generated, a probability is calculated based on the random number, and it is determined whether or not to retransmit a connection request for an idle signal transmitted from the base station in accordance with the calculated probability.

The transmission control unit 17 includes the access determination processing unit 1
If it is determined that the connection request can be output according to step 5 and the user has performed an operation of starting communication at that time, the connection request is output to the transmission unit 19. However, the access determination processing unit 15
Even if it is determined that the connection request can be output, the retransmission processing unit 16 does not output the connection request to the transmission unit 19 if the retransmission processing unit 16 determines not to retransmit the connection request.

This condition is satisfied for idle signals such as idle signals A and B, which enable transmission of a connection request only to mobile radio stations belonging to a specific group.
When a connection request transmitted from a mobile radio device belonging to the specific group collides, only the mobile radio devices belonging to the specific group are shifted in timing of the connection request to be retransmitted in the same manner as in the related art. It is provided to prevent requests from occurring at the same time.

Note that the transmission control unit 17 outputs the idle signal G
In the case where the connection request collides with an idle signal that enables transmission of the connection request to all the mobile wireless devices, the base station then transmits the connection request only according to the determination of the access determination processing unit 15. It is determined whether to output a connection request to the transmission unit 19 in response to the idle signal.

The transmission data generator 18 outputs data input from the user of the own device to the transmitter 19. The transmission unit 19 forms the frame shown in FIG. 1 based on the data output from the transmission control unit 17 and the transmission data creation unit 18, and transmits the frame to the base station using a radio signal.

Next, the operation when the mobile radio device accesses the base station in the radio communication access system including the base station and the mobile radio device having the above-described configuration will be described with reference to FIGS. In the following description,
Base station BS and mobile radios a1, a belonging to group A
2, mobile radio b belonging to group B, and group C
The case of a wireless communication access system including a mobile wireless device c belonging to the following example is taken as an example.

First, when there is no available communication line, the status flag generator 6 in the base station BS outputs a busy signal to the transmitter 4. In this case, in each mobile wireless device, the access determination processing unit 15 determines that the output of the connection request is not possible, so that the connection request is not transmitted to the base station BS even if the communication start operation is performed by the user. On the other hand, when a vacancy occurs in the communication line, the status flag generator 6 in the base station BS transmits an idle signal G to each mobile wireless device via the transmitter 4 (see FIG. 4).
It outputs a timing start signal to the timeout monitoring unit 7.

Thus, in each mobile radio device, the contents of the received status flag are stored in the status flag analysis unit 13.
Is parsed by Then, when it is determined that the signal is an idle signal, the access determination processing unit 15 determines the group to which the own device belongs to the group registration setting unit 14 and the type of the idle signal analyzed by the status flag analysis unit 13. Then, it is determined whether the connection request can be output.

Here, the status flag analysis unit 13 determines that the type of the idle signal transmitted from the base station BS is G
Thus, the access determination processing units 15 of all the mobile wireless devices determine that the connection request can be output. Accordingly, the transmission control unit 17 determines whether or not the user has performed an operation of starting communication, and outputs a connection request to the transmitting unit 19 if the user has performed an operation of starting communication.

The case shown in FIG. 4 shows a case where the user has performed a communication start operation on only one of the mobile radios a2, b, and c.
Then, in the mobile wireless device, the connection request output from the transmission control unit 17 is transmitted on the common control channel CCCH by the transmission unit 19 and transmitted to the base station BS.

Thus, in the base station BS, the connection request is detected by the connection request detection unit 5 before the timeout monitoring unit 7 outputs the timeout signal, so that the busy signal is transmitted from the status flag generation unit 6 to the transmission unit 4. At the same time, the data processing unit 2 outputs to the transmission unit 4 a connection permission for the mobile wireless device (one of the mobile wireless devices a2, b, and c) that transmitted the connection request. Then, when the connection permission is received by the mobile wireless device that has transmitted the connection request, the mobile wireless device regards that the connection with the base station BS has been established, and the transmission data generation unit 18 sends the transmission unit 1
Via 9, the data transmitted by the user is transmitted to the base station BS.

When the above-mentioned communication is completed and the busy state is exited, the status flag generator 6 of the base station BS
Generated the idle signal G last time, and since the connection request from the mobile radio did not collide with this, the base station BS transmits the idle signal G again (condition 1). Accordingly, the idle signal G is transmitted to each mobile wireless device (see FIG. 4), and at this time, a time-out start signal is output to the timeout monitoring unit 7. Thereby, the timeout monitoring unit 7 starts measuring a predetermined time.

Next, FIG. 4 shows a case where a plurality of mobile radios simultaneously transmit connection requests to the base station BS in response to the idle signal G transmitted from the base station BS (when the connection requests collide). It will be described with reference to FIG. In this case, as described above, the connection request detection unit 5 of the base station BS cannot detect a connection request from the mobile wireless device. For this reason, the status flag generator 6 determines that the connection request has collided because the connection request detector 5 does not detect the connection request until the timeout monitor 7 outputs the timeout signal. Then, the status flag generator 6 has generated the idle signal G last time, and the connection request from the mobile radio device has collided with the previous signal. To each mobile radio via

On the other hand, in each mobile radio, the contents of the received status flag are analyzed by the status flag analysis unit 13. Then, when it is determined that the signal is an idle signal, the access determination processing unit 15 determines the group to which the own device belongs to the group registration setting unit 14 and the type of the idle signal analyzed by the status flag analysis unit 13. Then, it is determined whether the connection request can be output.

Here, the status flag analyzer 13 determines that the type of the idle signal transmitted from the base station BS is A
Therefore, the access determination processing unit 15 determines that the connection request can be output only in the mobile wireless device whose own device belongs to the group A. When this determination result is sent to the transmission control unit 17, the transmission control unit 17
Determines whether the user is operating to start communication,
If the user has performed an operation to start communication, the connection request is output to the transmission unit 19. In the case shown in FIG.
The case where the user has performed an operation of starting communication only in the mobile wireless device a1 is shown. Therefore, the mobile radio a
Only one connection request is transmitted to the base station BS.

As a result, in the base station BS, before the timeout monitoring unit 7 outputs the timeout signal, the connection request is detected by the connection request detection unit 5 (that is, no collision of the connection requests occurs). The busy signal is output from the flag generation unit 6 to the transmission unit 4, and the data processing unit 2 outputs a permission to connect to the mobile wireless device a 1 to the transmission unit 4. Then, when the connection permission is received by the mobile radio device a1, the mobile radio device a1 considers that the connection with the base station BS has been established, and the user transmits the transmission data from the transmission data creation unit 18 to the transmission unit 19 via the transmission unit 19. Is transmitted to the base station BS.

Next, when the communication of the above-mentioned mobile radio device a1 is completed and the mobile station exits the busy state, the status generating section 6 of the base station BS has generated the idle signal A last time, and responds accordingly. Since no connection request collision occurred,
An idle signal B is generated (condition 3) and transmitted to each mobile wireless device via the transmission unit 4 (see FIG. 4). Then, in each mobile wireless device, the content of the received status flag is analyzed by the status flag analyzer 13 and determined to be an idle signal. As a result, the access determination processing unit 15 compares the group to which the own device set in the group registration setting unit 14 belongs with the type of the idle signal analyzed by the status flag analysis unit 13, and determines whether a connection request can be output. Determine whether or not.

Here, the status flag analysis unit 13 determines that the type of the idle signal transmitted from the base station BS is B
, The mobile radios a1, a2,
Each access determination processing unit 15b determines that the connection request can be output. When this determination result is sent to the transmission control unit 17, the transmission control unit 17 determines whether or not the user has performed an operation for starting communication. The transmission unit 19
Output to Here, the case shown in FIG. 4 shows a case where one of the users of the mobile wireless devices a2 and b has performed an operation of starting communication. Therefore, the mobile radio a
The connection request of 2 or b is transmitted to the base station BS.

As a result, the connection request detection unit 5 of the base station BS detects a connection request from the mobile radio device a2 or b (that is, no connection request collision occurs). The busy signal is output to the transmission unit 4, and connection permission for the mobile wireless device that has transmitted the connection request from the data processing unit 2 is output to the transmission unit 4. When the connection permission is received by the mobile wireless device that has transmitted the connection request, the mobile wireless device
It is considered that the connection with the base station BS has been established, and the data transmitted by the user is transmitted from the transmission data creation unit 18 to the base station BS via the transmission unit 19.

Then, the above-mentioned mobile radio a2 or b
When the communication is completed and the communication line becomes empty again, the status generation unit 6 of the base station BS transmits the idle signal B
Is generated, and the collision of the connection request does not occur in response thereto. Therefore, the idle signal G is generated (condition 5) and transmitted to each mobile wireless device via the transmission unit 4 (FIG. 4).
reference).

Next, referring to FIG. 5, in the case of FIG. 4 described above, a connection request between mobile radios belonging to group A transmitted in response to idle signal A collides, and FIG. In the following, a description will be given of a case where a connection request of a mobile wireless device belonging to group A and a mobile wireless device belonging to group B transmitted in response to an idle signal B collides.

First, a case where a connection request between mobile radio devices belonging to group A transmitted in response to an idle signal A collides will be described with reference to FIG. First, in the mobile radios a1 and a2, the idle signal A is respectively received, in each access determination processing unit 15, it is determined that the connection request can be transmitted, and the user of each mobile radio starts communication. If the operation has been performed, each transmission control unit 17 transmits a connection request to the base station BS via the transmission unit 19.

At this time, since the base station BS simultaneously receives connection requests from a plurality of mobile radios (in this case, mobile radios a1 and a2), the connection request detection unit 5 does not detect a connection request. No connection permission is transmitted to the mobile radio device. Therefore, the status flag generator 6
Since the connection request is not detected by the connection request detection unit 5 even if the timeout signal is output from the timeout monitoring unit 7, the idle signal A is generated again (condition 4) and each mobile radio is transmitted via the transmission unit 4. Send to machine.

Thus, in the mobile radio devices a1 and a2, the base station BS responds to the transmitted connection request from the base station BS.
Since neither the busy signal nor the connection permission is transmitted and the idle signal A is transmitted, each access determination processing unit 15 determines again that the connection request can be transmitted. Further, the retransmission processing unit 16 generates a random number, calculates a probability based on the random number, and determines whether to retransmit the connection request according to the probability. Then, the transmission control unit 17
Transmits a connection request to the base station BS via the transmission unit 19 according to the determination result of the retransmission processing unit 16. This allows
The timing of the next connection request to be transmitted is shifted between mobile radios belonging to the group A that has transmitted the connection request by a method similar to the related art.

Here, in FIG. 5 ', a connection request is not transmitted from mobile radio device a1 and a connection request is transmitted again from mobile radio device a2 according to the judgment result of each retransmission processing section 16. It indicates that For this reason,
Before the timeout signal is output from the timeout monitoring unit 7, the base station BS detects a connection request from the mobile wireless device a2, and gives a connection permission to the mobile wireless device a2. Then, the mobile radio device a2 to which the connection permission has been given.
Considers that the connection with the base station BS has been established, and transmits data transmitted by the user from the transmission data creation unit 18 to the base station BS via the transmission unit 19.

At this time, the mobile radios a1 and a2
If the connection requests of the mobile radios belong to the group A, the status flag generator 6 generates the idle signal A again and transmits it to the respective mobile radios via the transmitter 4. This is repeated until a connection with the machine is established. However, if the number of repetitions exceeds a predetermined number, the status flag generator 6 sets the idle signal B
Is generated (condition 7) and transmitted to each mobile wireless device via the transmission unit 4.

Next, a case where the connection requests of the mobile radios belonging to groups A and B transmitted in response to the idle signal B collide will be described with reference to FIG. 5 '. In the following description, a case where the connection requests of the mobile wireless devices a1, a2, and b collide will be described. First, the mobile radio a1,
In steps a2 and b, when the idle signal B is received and the status flag analyzer 13 of each mobile radio device determines that the status flag is the idle signal B, each access determination processor 15 transmits a connection request. Is determined to be possible.

At this time, if the user of each of the mobile radios a1, a2, and b has performed an operation for starting communication, the transmission control unit 17 of each mobile radio sets a connection request via the transmission unit 19. Transmit to base station BS. At this time, the base station BS
Then, a plurality of mobile radios (in this case, mobile radios a1,
Since the connection requests from a2 and b) are received at the same time, no connection request is detected by the connection request detection unit 5, and no connection permission is transmitted to any of the mobile radios. Therefore, in the status flag generating unit 6, since the connection request is not detected by the connection request detecting unit 5 even if the timeout signal is output from the timeout monitoring unit 7, the idle signal B is generated again (condition 6) and the transmitting unit 4 to each mobile radio.

Thus, in mobile radio equipment a1, a2, and b, idle signal B is transmitted from base station BS in response to the transmitted connection request, instead of busy signal or connection permission. Then, each access determination processing unit 15 determines again that the connection request can be transmitted. The retransmission processing unit 16 generates a random number,
A probability is obtained based on the random number, and it is determined whether or not to retransmit the connection request according to the probability. Then, the transmission control unit 17 transmits a connection request to the base station BS via the transmission unit 19 according to the determination result of the retransmission processing unit 16. As a result, the timing of the next connection request to be transmitted is shifted between the mobile radio devices belonging to groups A and B that have transmitted the connection request in the same manner as in the related art.

Here, in FIG. 5 ', according to the judgment result of each retransmission processing section 16, the mobile radios a1, a2
Indicates that the connection request is not transmitted, and that the connection request is transmitted again only from the mobile radio device b. Therefore, in the base station BS, before the timeout signal is output from the timeout monitoring unit 7, the connection request from the mobile wireless device b is detected, and the connection permission is given to the mobile wireless device b. Then, the mobile radio device b to which the connection permission has been given regards that the connection with the base station BS has been established, and transmits the data transmitted by the user from the transmission data creation unit 18 to the base station BS via the transmission unit 19. To send.

At this time, if the connection requests of the mobile radios a1, a2, and b collide again, or if the connection requests of two of the mobile radios collide, a status flag is generated. The unit 6 generates the idle signal B again and transmits it to each mobile wireless device via the transmitting unit 4, and thereafter, the idle signal B is transmitted until connection with any of the mobile wireless devices belonging to the groups A and B is established. repeat. However, if the number of repetitions exceeds a predetermined number, the status flag generator 6 generates an idle signal G (condition 8) and outputs it to the transmitter 4.

In the above-described embodiment, three groups A, B, and C to which the mobile radio device belong are described. However, if there are two or more groups, the group is not limited thereto.

The functions of the receiving unit 1, data processing unit 2, input / output unit 3, transmitting unit 4, connection request detecting unit 5, status flag generating unit 6, and timeout monitoring unit 7 in the configuration of the base station shown in FIG. Or the receiving unit 10 in the configuration of the mobile radio shown in FIG.
To implement the functions of the reception data analysis unit 11, control information analysis unit 12, status flag analysis unit 13, group registration setting unit 14, access determination processing unit 15, retransmission processing unit 17, transmission data creation unit 18, and transmission unit 19. Is recorded on a computer-readable recording medium, and the program recorded on the recording medium is read into a computer system and executed, thereby controlling connection between the base station and the mobile radio. You may.

Here, the “computer system” includes hardware such as an OS and peripheral devices.
If a WW system is used, a homepage providing environment (or display environment) is also included. The “computer-readable recording medium” is a floppy disk, a magneto-optical disk, a ROM, a CD-R
It refers to a portable medium such as an OM or a storage device such as a hard disk built in a computer system. Further, the “computer-readable recording medium” refers to a communication line for transmitting a program via a network such as the Internet or a communication line such as a telephone line, and dynamically holds the program for a short time. In this case, a medium that holds a program for a certain period of time, such as a volatile memory in a computer system serving as a server or a client in that case, is also included.

The above-mentioned program may be for realizing a part of the above-mentioned functions, and may be for realizing the above-mentioned functions in combination with a program already recorded in the computer system. May be.

For example, in a program for realizing the above-described functions, a computer assigns a priority to each of a plurality of groups, and assigns a priority to a mobile radio device belonging to a group having the highest priority among the plurality of groups. A first specific idle signal enabling transmission of a connection request only, and transmission of a connection request only to mobile radios belonging to a group excluding the group having the highest priority and the group having the lowest priority. A second specific idle signal, and any one of the general idle signals
A function of transmitting data based on a predetermined condition may be realized.

Further, in the program for realizing the above-described function, the idle signal transmitted last time to the computer is a general idle signal, and the connection requests transmitted from the mobile radio device do not collide with each other. In this case, a general idle signal is transmitted as an idle signal to be transmitted this time, and if the previously transmitted idle signal is a general idle signal, and a connection request transmitted from the mobile radio collides accordingly, the current transmission is performed. A specific idle signal as an idle signal to be transmitted, the previously transmitted idle signal is a specific idle signal, and
If the connection requests transmitted from the mobile wireless devices do not collide with each other, a general idle signal is transmitted as an idle signal to be transmitted this time, and the previously transmitted idle signal is a specific idle signal, and accordingly, When connection requests transmitted from the mobile wireless devices collide with each other, a function of transmitting a specific idle signal again may be realized.

Further, in the program for realizing the above-described function, the computer transmits to the computer the idle signal transmitted last time is the specific idle signal, and the connection requests transmitted from the mobile radio device collide with each other, When the transmission of the specific idle signal is repeated a predetermined number of times, a function of transmitting a general idle signal may be realized.

[0081]

As described above, according to the present invention, a plurality of radio communication processing devices notify each other of a communication frequency used by a base radio connected to each device. Since it is possible to grasp the communication frequency used by all base radios existing in the radio communication network system, when setting the communication frequency to be used for each base radio connected to the own device, It is possible to select a communication frequency that does not interfere with the communication frequency used by the base station connected to another wireless communication processing device, and more stable data communication in the wireless communication network system is possible.

[Brief description of the drawings]

FIG. 1 is a diagram showing a frame format of data exchanged between a base station and a mobile wireless device in a wireless communication access system according to the present invention.

FIG. 2 is a block diagram illustrating a configuration of a base station included in the wireless communication access system according to the present invention.

FIG. 3 is a block diagram showing a configuration of a mobile wireless device constituting the wireless communication access system.

FIG. 4 is a diagram showing a signal flow when a mobile radio device connects to a base station in the radio communication access system.

FIG. 5 is a diagram showing a signal flow when a mobile wireless device connects to a base station in the wireless communication access system.

[Explanation of symbols]

 Reference Signs List 1, 10 Receiving unit 2 Data processing unit 3 Input / output unit 4, 19 Transmitting unit 5 Connection request detecting unit 6 Status flag generating unit 7 Timeout monitoring unit 11 Received data analyzing unit 12 Control information analyzing unit 13 Status flag analyzing unit 14 Group registration Setting unit 15 access determination processing unit 16 retransmission processing unit 17 transmission control unit 18 transmission data creation unit

Continuation of the front page (72) Inventor Seigo Ariga 1-297 Kitabukuro-cho, Omiya-shi, Saitama F-term in the Mitsubishi Materials Research Laboratory 5K067 AA03 BB04 DD23 DD33 EE02 EE10 EE22 JJ17

Claims (6)

[Claims] 1. A mobile communication system comprising a base station and a plurality of mobile radios,
In a wireless communication access system for establishing a connection with the base station in response to a connection request transmitted from the mobile wireless device, the base station includes a mobile radio belonging to a specific group among a plurality of predetermined groups. A specific idle signal that enables transmission of a connection request only to a device, and one of a general idle signal that enables transmission of a connection request to all of the plurality of mobile wireless devices, based on a predetermined condition. An idle signal transmitting means for transmitting; and a mobile radio device, when a connection request is received from only one of the plurality of mobile radio devices in response to the idle signal transmitted from the idle signal transmitting device. And a connection permitting means for permitting connection to the wireless communication access system. 2. The idle signal transmitting unit assigns a priority to each of the plurality of groups, and transmits a connection request only to a mobile radio device belonging to a group having the highest priority among the plurality of groups. A first specific idle signal for enabling the connection and a second specific idle for enabling transmission of a connection request only to mobile radios belonging to a group excluding the group having the highest priority and the group having the lowest priority 2. The wireless communication access system according to claim 1, wherein a signal and any one of the general idle signals are transmitted based on a predetermined condition. 3. The idle signal transmitting means, wherein the previously transmitted idle signal is a general idle signal,
And, when the connection requests transmitted from the mobile wireless devices do not collide with each other, a general idle signal is transmitted as an idle signal to be transmitted this time, and the previously transmitted idle signal is a general idle signal,
And, when the connection requests transmitted from the mobile wireless devices collide with each other, a specific idle signal is transmitted as an idle signal to be transmitted this time, and the previously transmitted idle signal is a specific idle signal,
And, when the connection requests transmitted from the mobile wireless devices do not collide with each other, a general idle signal is transmitted as an idle signal to be transmitted this time, and the previously transmitted idle signal is a specific idle signal,
2. The wireless communication access system according to claim 1, wherein when the connection requests transmitted from the mobile wireless devices collide with each other, the specific idle signal is transmitted again. 4. The idle signal transmitting means, wherein the previously transmitted idle signal is a specific idle signal,
The connection request transmitted from the mobile wireless device collides accordingly, and when a specific idle signal is transmitted again a predetermined number of times, a general idle signal is transmitted. 3. The wireless communication access system according to 3. 5. The mobile radio device, comprising: a group setting unit in which a group to which the mobile device belongs is set from among the plurality of groups; and an idle signal transmission unit when receiving an idle signal from an idle signal transmission unit of the base station. Analyzing the idle signal to determine a group to which transmission of a connection request is permitted, comparing with a group to which the own device belongs to the group setting unit, and determining whether the own device can transmit the connection request. Determining means for determining whether or not transmission of a connection request is determined by the determining means; and
5. A connection request transmitting means for transmitting a connection request to the base station when an instruction to connect to the base station is issued by a user of the own device. The wireless communication access system according to claim 1. 6. A computer-readable recording medium recording a wireless communication access control program for establishing a connection with a base station in response to a connection request transmitted from a plurality of mobile wireless devices, comprising: A specific idle signal that enables transmission of a connection request only to mobile radio devices belonging to a specific group, and a general idle signal that enables transmission of a connection request to all of the plurality of mobile radio devices. A function of transmitting one of the signals to the mobile radio device based on a predetermined condition; and a connection request from only one of the plurality of mobile radio devices in response to the transmitted idle signal. If received, a radio communication access control program that causes the computer to realize a function of granting connection permission to the mobile radio device. Computer readable recording medium.