Radio communication system, mobile station, base station and radio network controller

Cross-reference of related applications for wireless communication systems, mobile stations, base stations, and wireless network controllers. This application requires an application in Japan on September 19, 2002, and its application number is P2002-274144, and on March 27, 2003 in Japan The application number of the application is the priority of P2003-089240; the entire content is incorporated here as a reference. TECHNICAL FIELD The present invention relates to a wireless communication system supporting multiple access communication, a mobile station, a base station, and a wireless network controller.

2. Description of the Related Art As shown in FIG. 1, in a conventional wireless communication system, broadcast communication using a plurality of base stations 11 to 17 in a predetermined area to transmit public information to unspecified mobile stations 101 to 112 is well known.

As shown in FIG. 2, in the conventional wireless communication system, multiple access communication using a plurality of base stations 11 to 17 to transmit public information to a specific mobile station connected to (belonging to) a specific group is well known.

However, there is a problem in the traditional multiple access communication that multiple mobile stations connected to a multiple access communication group receive the control signal of the multiple access communication group at approximately the same time, and the multiple response signals almost It is sent to the radio network controller at the same time, so as the response signal increases, the load of the radio network controller's reception control and processing increases. SUMMARY OF THE INVENTION In summary, the object of the present invention is to provide a wireless communication system that can reduce the load of the wireless network controller in multiple access communication, and can be used in a mobile station and a mobile station in the above-mentioned wireless communication system. Base station and a wireless network controller.

The first aspect of the present invention is summarized as a wireless communication system, which includes a wireless network controller, a base station, and a mobile station, which support multiple access communication.

The mobile station includes a response signal transmitter configured to transmit the response signal

03157407.6 First to the base station, where the response signal includes a group ID that identifies the multiple access communication group. The response signal responds to the control signal of the multiple-access communication group, and the mobile station is connected to the multiple-access communication group.

The base station includes a response signal transmitter configured to transmit at least one response signal to the radio network controller, the at least one response signal being at least one response transmitted from a mobile station connected to the same multiple access communication group Selected from the signal.

The second aspect of the present invention is summarized as a mobile station supporting multiple access communication. The mobile station includes a response signal transmitter configured to transmit a response signal including a group ID identifying a multiple access communication group to a base station. The mobile station that responds to the control signal of the multiple-access communication group is connected to the multiple-access communication group.

The third aspect of the present invention is summarized as a base station supporting multiple access communication. The base station includes a response signal transmitter configured to transmit at least one response signal to the radio network controller. The at least one response signal responds to a control signal of the multiple access communication group, and is selected from at least one response signal transmitted from a mobile station connected to the same multiple access communication group.

In a third aspect, the base station further includes a response signal holder configured to hold the at least one response signal for a predetermined duration before transmitting the at least one response signal to the radio network controller.

In a third aspect, the base station further includes a detector configured to detect the first reception of at least one response signal transmitted from the mobile station. The response signal holder may hold at least one response signal for a predetermined duration after the first received at least one response signal.

The fourth aspect of the present invention is summarized as a wireless communication system, which has a wireless network controller, a base station, and a mobile station, all of which support multiple access communication.

The mobile station includes a response signal transmitter configured to transmit a response signal to a base station, wherein the response signal includes a group ID for identifying a multiple access communication group »The response signal is connected to the mobile station Respond to the control signal of the multiple access communication group.

The base station includes a response signal counter configured to count the number of response signals transmitted from mobile stations connected to the same multiple access communication group, and a determiner configured to determine the number of response signals counted Is it more than a predetermined number, and a response signal is emitted

03157407.6 The first machine, which is configured to transmit at least one response signal to the radio network controller when the counted number of response signals is more than a predetermined number.

The fifth aspect of the present invention is summarized as a base station supporting multiple access communication. The base station includes a response signal counter, a judge and a response signal transmitter.

The response signal counter is configured to count the response signals of the control signal of the multiple access communication group. The response signal is transmitted from mobile stations connected to the same multiple access communication group.

The determiner is configured to determine whether the number counted in the response signal is more than a predetermined number.

The response signal transmitter is configured to transmit at least one response signal to the radio network controller when the counted number of response signals is more than a predetermined number.

In the fifth aspect, the response signal transmitter may notify the radio network controller that the counted number of response signals is more than a predetermined number, or the counted number of response signals.

The sixth aspect of the present invention is summarized as a radio network controller supporting multiple access communication. The radio network controller includes a receiver configured to receive a response signal transmitted from a base station, an extractor configured to extract information from the received response signal, and the extracted information displays More than a predetermined number of response signals are received, and a wireless controller configured to implement wireless control of multiple access communication based on the extracted information.

The seventh aspect of the present invention is summarized as a radio network controller supporting multiple access communication. The radio network controller includes a receiver configured to receive response signals transmitted from the base station, an extractor configured to extract the number of received response signals from the received response signals, and a The wireless controller is configured to implement wireless control of multiple access communication according to the number of extracted response signals.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a schematic diagram for explaining broadcast communication according to the prior art.

Fig. 2 is a schematic diagram explaining multiple access communication according to the prior art.

Fig. 3 is a schematic diagram showing the entire structure of a wireless communication system according to an embodiment of the present invention.

Fig. 4 is a functional block diagram of a mobile station in the wireless communication system according to the first embodiment.

Fig. 5 is a functional block diagram of a base station in a wireless communication system according to the first embodiment.

Fig. 6 is a sequence diagram of the operation of the wireless communication system according to the first embodiment.

03157407.6 Fig. 7 is a functional block diagram of a base station in a wireless communication system according to the second embodiment.

Fig. 8 is a sequence diagram of the operation of the wireless communication system according to the second embodiment.

Fig. 9 is a functional block diagram of a base station in a wireless communication system according to the third embodiment.

Fig. 10 is a sequence diagram of operations in the wireless communication system according to the third embodiment.

Fig. 11 is a functional block diagram of a base station in a wireless communication system according to the fourth embodiment.

Fig. 12 is a sequence diagram of the operation of the wireless communication system according to the fourth embodiment.

Fig. 13 is a functional block diagram of a base station in a wireless communication system according to a fifth embodiment.

Fig. 14 is a functional block diagram of a wireless network controller in a wireless communication system according to a fifth embodiment.

DETAILED DESCRIPTION Fig. 3 shows the entire structure of a wireless communication system according to an embodiment of the present invention.

As shown in FIG. 3, the wireless communication system according to this embodiment includes 4 base stations 10, 20, 30, 40 under the control of the wireless network controller 50. In the wireless communication system according to this embodiment, the base station 10 manages mobile The base station 20 manages the mobile station 21 and the mobile station 22, the base station 30 manages the mobile station 31 and the mobile station 32, and the base station 40 manages the mobile station 41 to the mobile station 43. In this embodiment, the mobile stations 11, 12, 21, 41, 42 and 43 are connected in the same multiple access communication group A.

Fig. 4 is a functional block diagram showing a mobile station used in a wireless communication system according to this embodiment. The functions of the plurality of mobile stations 11 to 43 are basically the same, so the functions of the mobile station 11 will be described below.

As shown in FIG. 4, the mobile station 11 is configured to include a control signal receiver 11a, a response signal transmitter 11b, and a response signal generator 11c. The mobile station 11 can support multiple access communication.

The control signal receiver 11a is configured to receive the control signal of the multiple access communication group A. The control signal of the multiple access communication group A is transmitted from the base station 10.

A response signal generator 11c is configured to generate a response signal in response to the control signal for the multiple access communication group A. The response signal includes a group ID that identifies the multiple access communication group and a response signal transmitter 11b, which is configured to respond after maintaining the response signal.

03157407.6 The first signal is transmitted to the base station 10. Fig. 5 is a functional block diagram of the base station used in the wireless communication system according to this embodiment. The functions of the plurality of base stations 10 to 40 are basically the same, so the functions of the base station 10 will be described below.

As shown in FIG. 5, the base station 10 is configured to include a mobile station signal receiver 10a, a control signal receiver 10b, a multiple access communication group identifier 10c, a response signal generator 10d, and a transmitter 10eo. The signal receiver 10a is configured to receive at least one response signal from a plurality of mobile stations 11 to 13.

The control signal receiver 10b is configured to receive a control signal for the multiple access communication group from the radio network controller 50.

The mobile station signal receiver 10a and a control signal receiver 10b can be configured with the same unit.

The multiple access communication group identifier 10c is configured to identify whether the received response signal is transmitted from a mobile station connected to the same multiple access communication group.

The response signal generator 10d is configured to extract at least one response signal from at least one response signal transmitted from the mobile station to generate at least one response signal (for example, a predetermined number of Response signal).

After extracting at least one response signal from the at least one response signal transmitted from the mobile station, the response signal generator 10d can generate at least one response signal to be transmitted to the radio network controller by changing the format of the at least one response signal.

The predetermined number established in each base station can be different. (For example, 1, 2, etc.).

The transmitter 10e is configured to transmit the control signal of the multiple access communication group to the mobile station.

The transmitter 10e is configured to transmit at least one response signal generated by the response signal generator 10d to the radio network controller 50.

The transmitter 10e can transmit the control signal to the mobile station after the predetermined duration (for example, a random duration) expires, and the control signal is set at the predetermined duration in each base station.

03157407.6 The second can be different.

Referring to FIG. 6, the following description will be made according to this embodiment. In the wireless communication system, the wireless network controller 50 performs predetermined processing on the mobile stations 11, 12, 21, 41, 42 and 43 connected to the multiple access communication group A. Operations (for example, business notification processing).

As shown in FIG. 6, in step 1001, the radio network controller 50 transmits control signals such as a service notification signal and a discrimination signal to the three base stations 10, 20, and 40.

In step 1002, each base station 10, 20, and 40 receives the control signal transmitted from the radio network controller 50. The control signals transmitted by each base station 10, 20 and 40 reach the mobile stations 11, 12, 21, 41, 42 and 43 connected to the multiple access communication group A under the control of the base stations 10, 20 and 40.

In step 1003, each of the mobile stations 11, 12, 21, 41, 42 and 43 generates a response signal including the group ID, so that each mobile station 11 having the group ID connected to the multiple access communication group A The recognition of, 12, 21, 41, 42 and 43 is possible. Each mobile station 11, 12, 21, 41, 42 and 43 transmits the generated response signal to the base stations 10, 20 and 40, respectively.

In step 1004, each base station 10, 20 and 40 receives at least one response signal from each mobile station 11, 12, 21, 41, 42 and 43, and identifies whether each response signal is connected to the same multiple access communication Launched by the mobile station of the group.

In this embodiment, each base station 10, 20, and 40 recognizes whether each response signal is transmitted from a mobile station connected to the multiple access communication group A.

The base station 10 receives two response signals from the mobile stations 11 and 12 connected to the multiple access communication group A. The base station 20 receives a response signal from the mobile station 21 connected to the multiple access communication group A. The base station 30 receives three response signals from the mobile stations 41, 42, 43 connected to the multiple access communication group A. At base stations 10, 20 and 40, a total of six response signals are detected. The base station 30 cannot receive any response signals from the mobile stations 41, 42, 43 connected to the multiple access communication group A.

In addition, each base station 10, 20, and 40 selects at least one response signal (for example, two response signals) from at least one received signal, and transmits at least one selected response signal to the radio network controller 50. Each base station 10, 20 and 40 can be launched from

03157407.6 At least one response signal received by the first plurality of mobile stations is a combined signal.

In this embodiment, the base station 10 selects at least one response signal transmitted from the mobile station 11 for transmission to the radio network controller 50. The base station 20 selects at least one response signal transmitted from the mobile station 21 for transmission to the radio network controller 50. The base station 40 selects at least one response signal transmitted from the mobile station 41 for transmission to the radio network controller 50.

In step 1005, the radio network controller 50 transmits service data to the base stations 10, 20, and 40 according to at least one response signal transmitted from each mobile station 11, 21, 41. In other words, the radio network controller 50 performs transmission control based on at least one response signal transmitted by each mobile station 11, 21, 41.

In step 1006, each base station 10, 20 and 40 transmits the received service data to each mobile station 11, 12, 21, 41, 42 and 43. The wireless communication system according to the first embodiment can reduce the load of reception, processing, and control performed by the wireless network controller 50. When the control signals of the multiple access communication group are received at about the same time on multiple mobile stations, like The multiple access communication or broadcast communication is transmitted to the radio network controller 50 by combining a plurality of response signals into one signal, and the response signal increases at the same time.

The present invention is not limited to the first embodiment, and can be applied to the wireless communication system according to the second embodiment, which further includes a response signal holder as shown in FIG. 7.

The wireless communication system according to the second embodiment is the same as the wireless communication system according to the first embodiment except for the response signal holder 10f. Therefore, the main differences between these two wireless communication systems will be explained below.

The response signal holder 10f is configured to hold at least one response signal for a preset duration (for example, a random duration) before transmitting the at least one response signal to the radio network controller 50. At least one response signal responds to the control signal of the multiple access communication group A, and the predetermined duration established in each base station is different.

The response signal generator 10d is configured to generate at least one response signal to be transmitted according to at least one response signal held by the response signal holder 10f for a random duration.

03157407.6 No. 8, referring to FIG. 8, the following description will be made in conjunction with this embodiment. The radio network controller 50 executes in the mobile stations 11, 12, 21, 41, 42 and 43 connected to the multiple access communication group A of the wireless communication system. A scheduled processing (for example, business notification processing).

As shown in FIG. 8, in step 1001, the radio network controller 50 transmits control signals such as a service notification signal and a discrimination signal to the three base stations 10, 20, and 40.

In step 1002, each base station 10, 20, and 40 receives the control signal transmitted from the radio network controller 50. The control signal transmitted by each base station 10, 20, and 40 reaches the mobile station 11, 12, 21, 41, 42, 43 under the control of the base station 10, 20, and 40 connected to the multiple access communication group A. In step 1003, each mobile station 11, 12, 21, 41, 42 and 43 generates a response signal including the group ID. Therefore, for each mobile station 11 connected to the multiple access communication group A with the group ID , 12, 21, 41, 42, 43 recognition becomes possible. Each mobile station 11, 12, 21, 41, 42 and 43 transmits the generated response signal to the base stations 10, 20 and 40, respectively.

In step A, each base station 10, 20, and 40 maintains at least one response signal received from each mobile station 11, 12, 21, 41, 42, and 43 within a predetermined duration for a predetermined duration.

In step 1004, within a predetermined duration, each base station 10, 20, and 40 selects at least one response signal from the held at least one response signal, and transmits the selected at least one response signal to the wireless network control, respectively.Device50in.

In this embodiment, the base station 10 selects at least one response signal from the mobile station 11 for transmission to the radio network controller 50, and the base station 20 selects at least one response signal transmitted from the mobile station 21 for transmission To the wireless network controller 50. The base station 40 selects at least one response signal transmitted from the mobile station 41 for transmission to the radio network controller 50.

In step 1005, the radio network controller 50 transmits service data to the base stations 10, 20, and 40 according to at least one response signal transmitted by each mobile station 11, 21, 41. In other words, the radio network controller 50 performs transmission control according to at least one response signal transmitted from each of the mobile stations 11, 21, 41.

03157407.6 First, in step 1006, each base station 10, 20, and 40 transmits the received service data to each mobile station 11, 12, 21, 41, 42, 43.

The present invention is not limited to the above-mentioned embodiment, and it can be applied to a wireless communication system according to the third embodiment, which further includes a response signal holder 10f and an initial response detector 10go as shown in FIG. 9 The wireless communication system according to the third embodiment is the same as the wireless communication system according to the first embodiment except for the response signal holder 10f and an initial response detector 10g. Therefore, the main differences between the two wireless communication systems will be explained below. The place.

The initial response detector 10g is configured to detect the first reception of at least one response signal received from each mobile station 11, 12, 21, 41, 42, 43 connected to the multiple access communication group A.

In this embodiment, after the first reception of at least one response signal, the response signal holder 10f holds at least one received response signal (for example, a random duration) for a predetermined duration.

The response signal generator 10d generates at least one response signal to be transmitted to the radio network controller 50 according to at least one response signal held by the response signal holder in a random duration.

10, the following will be described in detail according to this embodiment. The radio network controller 50 performs a predetermined process on the mobile stations 11, 12, 21, 41, 42, 43 connected to the multiple access communication group A of the wireless communication system. (For example, business notification processing).

As shown in FIG. 10, in step 1001, the radio network controller 50 transmits control signals such as a service notification signal and a discrimination signal to three base stations 10, 20, and 40.

In step 1002, each base station 10, 20, and 40 receives the control signal transmitted from the radio network controller 50. The control signals transmitted by each base station 10, 20, and 40 reach the mobile stations 11, 12, 21, 41, 42 and 43 connected to the multiple access communication group A under the control of the base stations 10, 20, and 40.

In step 1003, each mobile station 11, 12, 21, 41, 42 and 43 generates a response signal including the group ID. Therefore, it is possible to identify each of the mobile stations 11, 12, 21, 41, 42 and 43 connected to the multiple access communication group A with the group ID.

03157407.6 Each mobile station 11, 12, 21, 41, 42 and 43 transmits the generated response signal to the base stations 10, 20 and 40, respectively.

In step B1, each base station 10, 20, and 40 detects the first response signal of at least one response signal received from each of the mobile stations 11, 12, 21, 41, 42 and 43 connected to the multiple access communication group A. receive.

In step B2, after the first reception, after the first reception for a predetermined duration, each base station 10, 20, and 40 keeps receiving data from each of the mobile stations 11, 12, 21, 41, 42 and 43 At least one response signal.

In step 1004, after the first reception, each base station 10, 20, and 40 selects at least one response signal from at least one response signal held for a predetermined duration, and transmits the selected at least one response signal respectively To the wireless network controller 50.

In this embodiment, the base station 10 selects at least one response signal transmitted from the mobile station 11 for transmission to the radio network controller 50, and the base station 20 selects at least one response signal transmitted from the slave station 21, It is used to transmit to the radio network controller 50, and the base station 40 selects at least one response signal transmitted in the mobile station 41, which is used to transmit to the radio network controller 50.

In step 1005, the radio network controller 50 transmits service data to the base stations 10, 20, and 40 according to at least one response signal transmitted from each of the mobile stations 11, 21, and 41. In other words, the radio network controller 50 performs transmission control according to at least one response signal transmitted from each mobile station 11, 21, 41.

In step 1006, each base station 10, 20 and 40 transmits the received service data to each mobile station 11, 12, 21, 41, 42 and 43.

The present invention is not limited to the above-mentioned embodiment, and it can be applied to a wireless communication system according to the fourth embodiment, which further includes a response signal counter 10h and a comparator 10io as shown in FIG. 11 according to the fourth embodiment The wireless communication system of the example is the same as the wireless communication system according to the first embodiment except for the response signal counter 10h and a comparator 10i. Therefore, the main differences between the two wireless communication systems will be described below.

The response signal counter 10h is configured to count from

03157407.6 The number of response signals transmitted by each mobile station 11, 12, 21, 41, 42 and 43 connected to the multiple access communication group A.

In this embodiment, there are three mobile stations 41 to 43 under the control of the base station 40, so the number of control signals (downlink direction) response signals (uplink direction) transmitted by the base station 40 can be one in the range of 0 to 3. value.

A comparator 10i is configured to determine whether the number of response signals transmitted by the mobile stations 1b 12, 21, 41, 42 and 43 connected to the multiple access communication group A is more than a predetermined number within a predetermined duration (One threshold).

For example, when the predetermined number is 2 and the number of response signals transmitted from the mobile stations 11, 12, 21, 41, 42 and 43 connected to the multiple access communication group A is less than or equal to "2", the comparator 10i can determine The response signal shall be transmitted to the radio network controller 50 ±o. When the predetermined number is 3 and the number of response signals transmitted from the mobile stations 11, 12, 21, 41, 42 and 43 connected to the multiple access communication group A is equal to "3", the comparator 10i can determine that at least one of the selected three response signals (for example, two response signals) should be transmitted to the radio network controller 50.

The predetermined number (threshold value) may be determined by the base station 10 or the radio network controller 50.

In this embodiment, according to the judgment result (comparison result) of the comparator 10i, the response signal generator 10d generates at least one response signal to be transmitted to the radio network controller 50.

For example, the response signal generator 10d can be configured to transmit at least one response signal received from the mobile station to the transmitter 10e when at least one response signal is transmitted.

The response signal generator 10d can be configured to transmit at least one response signal to the transmitter 10e when at least one response signal is transmitted.

Referring to FIG. 12, the following will be described in detail according to this embodiment. The radio network controller 50 performs a predetermined process on the mobile stations 11, 12, 21, 41, 42, 43 connected to the multiple access communication group A of the wireless communication system. (For example, business notification processing).

As shown in FIG. 12, in step 1001, the radio network controller 50 transmits control signals such as a service notification signal and a discrimination signal to the three base stations 10, 20, and 40.

03157407.6 First, in step 1002, each base station 10, 20, and 40 receives the control signal transmitted from the radio network controller 50. The control signals transmitted by each base station 10, 20 and 40 reach the mobile stations 11, 12, 21, 41, 42 and 43 connected to the multiple access communication group A under the control of the base stations 10, 20 and 40.

In step 1003, each mobile station 11, 12, 21, 41, 42 and 43 generates a response signal including the group ID. Therefore, it is possible to identify each mobile station 11, 12, 21, 41, 42, 43 connected to the multiple access communication group A with the group ID. Each mobile station 11, 12, 21, 41, 42 and 43 transmits the generated response signal to the base stations 10, 20 and 40, respectively.

In step C1, each base station 10, 20 and 40 counts the number of response signals transmitted from each mobile station 11, 12, 21, 41, 42 and 43 connected to the multiple access communication group A.

In step C2, each base station 10, 20 and 40 judges whether the number of response signals transmitted from the mobile stations 11, 12, 21, 41, 42 and 43 connected to the multiple access communication group A is more than a predetermined number (threshold value) .

When the counted number of response signals is less than or equal to the predetermined number, each base station 10, 20, and 40 transmits at least one received response signal to the radio network controller 50, as in step 1004. On the other hand, when the counted response signal When the number is more than the predetermined number, each base station 10, 20, and 40 transmits at least one response signal selected from the at least one response signal to the radio network controller 50, as in step 1004_ο In this embodiment, the base station 10 selects at least one response signal transmitted from the mobile station 11 for transmission to the radio network controller 50, and the base station 20 selects at least one response signal transmitted by the mobile station 21 for transmission To the radio network controller 50, the base station 40 selects at least one response signal transmitted from the mobile station 41 for transmission to the radio network controller 50. In step 1005, the radio network controller 50 according to each mobile station 11, At least one response signal transmitted in 21 and 41 transmits service data to the base stations 10, 20, and 40. In other words, the radio network controller 50 performs transmission control according to at least one response signal transmitted from the mobile stations 11, 21, 41.

03157407.6 First, in step 1006, each base station 10, 20 and 40 transmits the received service data to each mobile station 11, 12, 21, 41, 42 and 43.

The present invention is not limited to the above-mentioned embodiment, and it can be applied to the wireless communication system according to the fifth embodiment, which further includes a response signal counter 10h, a comparator 10i, and a comparison result as shown in FIG. The adder 10j.

The wireless communication system according to the fifth embodiment is the same as the wireless communication system according to the fourth embodiment except for the structure of a comparison result adder 10j and the wireless network controller 50. Therefore, the two wireless communication systems will be described below. The main difference.

The comparison result adder 10j is configured to instruct the response signal generator 10d to notify the information and the response signal to the wireless network controller 50, wherein the information is displayed as the comparison result obtained by the comparator 10i, that is, displayed at a predetermined The result of judging whether the number of response signals transmitted by the mobile stations 11, 12, 21, 41, 42 and 43 connected to the multiple access communication group A is more than a predetermined number (a threshold).

For example, the response signal generator 10d generates at least one response signal according to the instruction of the comparison result adder lQj, which includes information indicating that the number of response signals is more than a predetermined number or that the number of response signals is not more than a predetermined number. Number of information.

The response signal generator 10d can generate at least one response signal according to the instruction of the comparison result adder 10j, and the response signal includes the counted number of response signals.

As shown in FIG. 14, the wireless network controller 50 is configured to include a receiver 50a, a response signal extractor 50b, a wireless controller 50c, and a transmitter 50d._o The receiver 50a is configured to receive the response signal transmitted from each base station 10-40.

A response signal extractor 50b, which is configured to extract display information from the response signal received by the receiver 50a, wherein the extracted information is displayed as the counted response signal number is more than a predetermined number or the counted response signal number.

The wireless controller 50c is configured to perform wireless control in multiple access communication according to the extracted information or the number of extracted response signals.

For example, the wireless controller 50c may be configured to be transmitted when the response signals received from the mobile stations connected in the multiple access communication group A are combined into one signal, that is, when the display

03157407.6 When the number of first response signals exceeds a predetermined number of information is extracted from the received response signal, transmission control is performed on multiple mobile stations in the connection multiple access communication group A by using an ordinary circuit.

On the other hand, the wireless controller 50c may be configured to when the response signals received from the mobile stations connected in the multiple access communication group A are respectively transmitted, that is, when displaying information that the number of response signals is more than a predetermined number When it is not extracted from the received response signal, transmission control is performed on a plurality of mobile stations connected to the multiple access communication group A by using respective circuits.

The present invention can provide a base station for a wireless communication system, a mobile station and a wireless network controller, which can reduce the load of the wireless network controller in multiple access communication.

For those skilled in the art, other advantages and modifications will be obvious. Therefore, the broader scope of the present invention is not limited to the specific details and typical embodiments shown and described herein. Accordingly, various modifications can be made without departing from the spirit or scope of the overall inventive concept as determined by the appended claims.

03157407.6