JPH09307497A - Repeating control radio communication system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve transmission efficiency by enabling consecutive data transmission within a communication time set by a repeater station so as to unnecessitate time of releasing and securing a radio line. SOLUTION: A data link release confirming signal 31 transmitted from a radio station A is received by radio stations B and C to send a data connection request signal 32 to start data transmission. The radio station A transmits a data connection request affirming signal 33, the radio station C transmits an information signal 34, the radio station A sends back an information normality signal 35 and the radio station C transmits a data link releasing signal 36 to the radio station A. The radio station A transmits the data link release confirming signal 31 to the radio station. When the radio station B holds transmission data, the operation is repeated again. When there is not transmitting data, radio line is released 37 to a radio station to which the repeater station gives the same user code in a regulated time. Before the release of the radio line, the other radio stations B and C start data transmission to consecutively transmit data within the regulated time set by the repeater station.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a relay control wireless communication system for transmitting / receiving data or voice to / from a 1-to-N station using the same group identification code as in wireless communication such as multi-channel access (MCA) system. Regarding

[0002]

2. Description of the Related Art FIG. 3 is a sequence diagram showing a conventional wireless data communication processing state. In the example of FIG. 3, the wireless stations A, B,
C and a relay station, and whether or not the wireless station A can transmit a connection request signal to the relay station in response to a data transmission request (1) from the user to the wireless station A to the wireless station B. To detect.

In wireless communication such as the MCA system, another wireless station B having the same user code (identical group identification code) is communicating with the wireless station C for transmitting voice data and control data. In use (2),
The end of this communication is recognized by the wireless line release (3). Specified time until this wireless line release (3) (no transmission time t)
Cannot transmit the connection request signal to the relay station, and no transmission time t
The channel is released later.

Therefore, in the case of continuously transmitting data, after the wireless line is secured by the connection request (4) from the wireless station A to the relay station after the non-transmission time t, the data is transmitted from the wireless station A to the wireless station C. Transmission is starting (5).

As a conventional example relating to such an MCA system, there can be mentioned "MCA wireless data communication method and apparatus" in Japanese Patent Laid-Open No. 1-319337. In the conventional example of this publication, channels are sequentially released to a plurality of terminal stations requesting data transmission within an allowable communication time,
It is possible to minimize the occurrence of call loss during channel assignment.

[0006]

However, in the above-mentioned conventional example, since another mobile station of the same specific user code is called through the relay station by the transmission from the radio station which is a mobile station, the current point in time is The transmission completion of other wireless stations communicating through the relay station is not known. Therefore, while another wireless station with the same user code is communicating voice data and control data, data cannot be transmitted unless the wireless station that wants to send data is transmitted again and the wireless line is secured. There was a drawback that quick communication was not possible.

The present invention solves the above problems in the prior art. In the multi-channel access (MCA) system, continuous data transmission becomes possible within the communication time set by the relay station, and (EN) Provided is a relay control wireless communication system which eliminates the time required to release and secure a wireless line and improves its transmission efficiency.

[0008]

In order to achieve the above object, the invention according to claim 1 is such that a relay station assigns channels to wireless stations of a plurality of identical identification code groups, and defines after communication is completed. In a relay control wireless communication system that releases a proprietary channel when time passes,
When another wireless station receives the data link release confirmation signal from the wireless station through the relay station and the other station holds transmission data, this wireless station sends a data connection request signal and receives a connection request positive signal for this transmission. The data transmission is performed by.

The relay control radio communication system according to claim 2 is applied to a multi-channel access communication system.

The relay control radio communication system according to claim 3 transmits voice or data as transmission data.

In the relay control wireless communication system according to the fourth aspect, the wireless station is a mobile station.

The relay control radio communication system having such a configuration detects the data link release confirmation signal generated at the end of data transmission and continuously transmits the data connection request before the elapse of the specified time after the end of communication. . That is, continuous data transmission is possible within the communication time set by the relay station without performing the channel release (release of the wireless line) due to the lapse of the specified time, and the transmission efficiency is improved.

Further, since the channel is not released (the wireless line is released) after the lapse of the specified time,
As in the conventional example, while another wireless station with the same user code is communicating voice data and control data, it is not necessary to perform transmission again from the wireless station desiring to transmit and secure that wireless channel. The time required to release and secure the data is unnecessary, and the transmission efficiency is improved.

[0014]

BEST MODE FOR CARRYING OUT THE INVENTION Next, an embodiment of a relay control wireless communication system of the present invention will be described in detail with reference to the drawings. FIG. 1 is a block diagram showing a configuration in an embodiment of a relay control wireless communication system of the present invention. The relay control wireless communication system of FIG. 1 is, for example, a wireless station (mobile station) based on the MCA method, and performs data transmission / reception with another wireless station (mobile station) through a relay station (not shown). The wireless device 1 performs wireless transmission / reception, and the data transmission device 2 processes an audio signal or data to be transmitted.

The wireless device 1 has a wireless unit 11 to which an antenna for transmitting and receiving is connected and which transmits and receives to and from another mobile station through a wireless line, and a control unit 12 which controls the wireless unit 11 and the data transmission device 2. Then, the control unit 12 controls a connection request signal transmission command and a transmission / reception request in response to a connection request with the user's other wireless station, and also transmits the wireless line state to the data transmission device 2 and performs voice communication. In this case, a voice demodulation process and a voice modulation process are performed.

The data transmission device 2 includes a data storage unit 21 for temporarily storing transmission data, a data transmission control unit 22 for controlling the wireless device 1 and the data transmission device 2 when performing data transmission, and data transmission A data modulator / demodulator 23 that demodulates and modulates a signal input to and output from the wireless device 1 when performing
And

Further, the wireless communication-enabled area (service area) output by the control unit 12 of the wireless device 1, out-of-area, wireless channel control channel access, call channel access, voice communication of communication content, data communication, etc. Has a wireless line status detecting section 24 for sending the information of (1) to the data transmission control section 22, and an external interface circuit 25 for inputting / outputting data to / from an external terminal (not shown).

Next, the operation of this embodiment will be described. In FIG. 1, transmission data input from an external device (not shown) through the external interface circuit 25 is temporarily stored in the data storage unit 21. The transmission data stored in the data storage unit 21 is transferred to the data transmission control unit 2
It is sent to the data modulation / demodulation unit 23 under the control of 2. The data received from the data modulation / demodulation unit 23 is temporarily stored in the data storage unit 21 and sent to an external device (not shown) through the external interface circuit 25.

In this case, when the data transmission control unit 22 receives a data transmission request from an external device (not shown) through the external interface circuit 25, the transmission data from the external device (not shown) is temporarily stored in the data storage unit 21 through the external interface circuit 25. Control is performed.

When this transmission data is temporarily stored in the data storage unit 21, the data transmission control unit 22 takes in the wireless communication condition input from the wireless line state detection unit 24, confirms this condition, In order to perform the wireless transmission, a connection request signal is transmitted through the data modulation / demodulation unit 23 to secure a wireless line, and the control unit 12 and the wireless unit 11 of the wireless device 1 are connected.
Wirelessly from.

When the connection confirmation signal from the relay station for this wireless transmission is returned, the connection confirmation signal is transmitted to the wireless device 1.
The data transmission control unit 22 receives the data connection request signal via the data transmission control unit 22 and sends the data connection request signal for data transmission to the wireless device 1, and the wireless device 1 transmits the data connection request signal. When a data connection affirmative signal is returned in response to this data connection request signal, the data transmission control unit 22 is passed through the wireless device 1.
Recognizes that a data link has been established with the other station.

Based on this recognition, the data transmission control unit 22
Wirelessly transmits the data in the data storage unit 21 through the data modulation / demodulation unit 23 and the wireless device 1. Here, the wireless line state detection unit 24 outputs the control unit 12 of the wireless device 1 within the wireless communication enabled range, out of service area, wireless channel control channel access, call channel access, voice communication of communication content, data communication, etc. Information is sent to the data transmission control unit 22.

FIG. 2 is a sequence diagram showing a processing state of transmission / reception with another wireless station using the relay control wireless communication system shown in FIG. 1 and 2, M shown in FIG.
Wireless stations (mobile stations) A, B, and C based on the CA method perform data transmission / reception through relay stations. First, at the time of data transmission, the data link release confirmation signal (31) transmitted from the wireless station A to the wireless station B performing data transmission is also received by the wireless station C at the same time. At this time, the wireless station C, which is in a standby state for data transmission to the wireless station A, sends out a data connection request signal (32) and starts data transmission.

The wireless station A, which has normally received the data connection request signal (32), returns a data connection request positive signal (33). The wireless station C which has received the data connection request positive signal (33) transmits the information signal (34). The wireless station A that has normally received the information signal (34) returns the information normal signal (35). The wireless station C which has received the information normal signal (35) sends the data link release signal (36) to the wireless station A.
Send to The wireless station A that has received the data link release signal (36) transmits a data link release confirmation signal (31) to the wireless station A.

At this time, if the data transmitted by the wireless station B is held, the above operation is repeated again. If there is no data to be transmitted, depending on the specified time (no communication t),
The relay station releases the wireless line (37) to the wireless station to which the same user code is added.

As a result, the data link release confirmation signal (3
Since the other wireless stations B and C start data transmission before detecting 1) and releasing the wireless channel, continuous data transmission is performed within the specified time set by the relay station.

[0027]

As is apparent from the above description, according to the relay control wireless communication system of the present invention, the data link release confirmation signal generated at the end of data transmission is detected,
Since the data connection request is continuously sent before the lapse of the specified time after the end of the communication, without releasing the channel (releasing the wireless line) due to the lapse of the specified time, within the communication time set by the relay station. Continuous transmission of data becomes possible, and the transmission efficiency is improved.

Since the channel is not released (the wireless line is released) due to the lapse of the specified time,
It is not necessary to perform transmission again from a wireless station desiring transmission to secure the wireless line, and the time required to release and secure the wireless line becomes unnecessary, and the transmission efficiency is improved.

[Brief description of drawings]

FIG. 1 is a block diagram showing a configuration in an embodiment of a relay control wireless communication system of the present invention.

FIG. 2 is a sequence diagram showing a processing state of transmission / reception with another wireless station in the embodiment.

FIG. 3 is a sequence diagram showing a conventional wireless data communication processing state.

[Explanation of symbols]

 1 wireless device 2 data transmission device 11 wireless unit 12 control unit 21 data storage unit 22 data transmission control unit 23 data modulation / demodulation unit 24 wireless line state detection unit 25 external interface circuit A to C wireless station (mobile station)

Claims (4)

[Claims] 1. A relay control wireless communication system in which a relay station allocates channels to wireless stations of the same identification code group, and releases a dedicated channel when a prescribed time has elapsed after the end of communication. When another wireless station that has received a data link release confirmation signal from the station through the relay station holds transmission data, this wireless station transmits a data connection request signal,
A relay control wireless communication system, wherein data is transmitted by receiving a connection request affirmative signal for this transmission. 2. A relay control wireless communication system, wherein the relay control wireless communication system according to claim 1 is applied to a communication system of a multi-channel access system. 3. The relay control wireless communication system according to claim 1, wherein voice or data is transmitted as transmission data. 4. The relay control wireless communication system according to claim 1, wherein the wireless station is a mobile station.