JPH04196932A - Radio line connecting system - Google Patents

Abstract

PURPOSE:To shorten time for radio line connection by reducing the probability of connecting a radio line again by judging an idle communication channel on the side of terminating a call as well and connecting the radio line to the same idle communication channel on the call originating side and the call terminating side among the plural idle communication channels. CONSTITUTION:For example, when the intensity of a received signal is lower than a fixed level, a vacancy judging circuit 15 judges the communication channel is vacant. Each time the idle speaking channel is detected, a storing means 17 stores the plural kinds of idle speaking channel number information. A call terminating side equipment 1b compares and collates the idle speaking channel number information stored in the radio equipment 1b itself with the above- mentioned number information contained in a connection request signal 110 when the signal 110 transmitted from a radio equipment 1a is received. Then, among the above-mentioned number information in the radio equipments 1a and 1b, the same information is selected. This idle speaking channel number information is transmitted from the radio equipment 1b to the 1a while being contained in a connection response signal 111.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a multi-channel access wireless line connection system.

[Summary of the invention]

The present invention provides a wireless communication device using a multi-channel access system, in which, when a wireless line is connected, a plurality of empty communication channels are determined to be empty by both the calling side wireless communication device and the called side wireless communication device. This is one of the communication channels.

[Conventional technology]

In the multi-channel access method found in personal radios, only the calling side wireless communication device determines which channels are free, and only one free channel is sent out as the number information of the free channel on the control channel. It is something that

[Problem to be solved by the invention]

In the above-mentioned method in which the availability of a call channel is determined only by the calling side wireless communication device, depending on the positional relationship between the calling side wireless communication device and the called wireless communication device, it is not always the case that the calling side wireless communication device A call channel that is determined to be an empty call channel is not necessarily an empty call channel in the called wireless communication device, and if a wireless line is connected to this call channel, the quality of the call will be poor. It may also interfere with other wireless communications. Furthermore, when such a situation occurs, it is necessary to restart the wireless line connection from the beginning, so there is a drawback that it takes time to establish the wireless line connection.

[Means to solve the problem]

In order to solve the above-mentioned problems, the present invention is configured such that the called side also determines an empty communication channel, and both the calling side and the called side are connected to the same communication channel determined to be an empty communication channel.

[Effect]

With the above configuration, since the called side also determines an empty communication channel, it is possible to prevent a case where the calling side determines an empty communication channel, but the called side determines that it is a used communication channel.

〔Example〕

An embodiment of the present invention will be described below based on the drawings.

FIG. 1 shows a wireless communication system that communicates between a wireless device 1a and a wireless device 1b that can transmit and receive data using a wireless channel 101. As shown in FIG. FIG. 2 shows a series of flowcharts from call origination to conversation, and FIG. 3 is a block diagram showing an embodiment of the wireless communication device according to the present invention.

The radio device 1 includes an antenna 20, an antenna switching circuit 11 that connects the antenna 20 to the transmitter when transmitting, and to the receiver when receiving.
Receiver 12, transmit l! 14, receiver 12 and transmitter 1
4, a synthesizer 13 that specifies the transmission/reception channel of No. 4, an availability determination circuit 15 that determines whether or not a receiving channel is vacant from the reception output of the receiver 12, and this availability determination circuit 1.
The communication channel comprises a storage means 17 for storing number information of the communication channel determined to be vacant in step 5, and a control circuit 16.

Here, the availability determination circuit 15 is configured to determine that the communication channel is vacant, for example, when the strength of the received signal is below a certain point. Furthermore, the storage means 17 is configured to store a plurality of pieces of empty call channel number information each time an empty call channel is detected.

Further, the control section 16 includes a main control section consisting of, for example, a CPU, and performs various controls of the radio device 1, including comparison and verification of free call channels and control of wireless line connection.

Next, a wireless line connection system according to an embodiment of the present invention will be explained based on the above configuration.

In the flowchart shown in FIG. 2, for example, the calling side is assumed to be a wireless device 1a, and the called side is assumed to be a wireless device 1b. When making a call,
The connection request signal 110 issued by the wireless device 1a includes wireless @la.
Contains information on multiple free call channel numbers held by. When the called radio device 1b receives the connection request signal 110 issued by the radio device 1a, it combines the free call channel number information stored in the radio device 1b itself and the free call channel number included in the received connection request signal 110. Compare and match the information and confirm that radio 1a and radio I! The same one is selected from among the free call channel number information possessed by each of the lbs. If there is a plurality of identical free call channel number information, one of them is selected and determined as the call channel. Compare and match this series of processing to an empty call channel 1
Do it at 20.

Next, the vacant communication channel number information determined as the communication channel is included in a connection response signal 111 from the radio 1b and transmitted to the radio 1a. The radio device 1a receives this connection response signal 111, and uses the synthesizer 13 to set it to the wireless channel of the idle call channel number information included in this connection response signal 111. Similarly, the wireless channel of the wireless device 1b is set to this empty communication channel.

The wireless line connection is now complete, and you will be able to talk on this wireless channel from now on. Note that the connection request signal 110 and connection response signal 111 are transmitted and received through a control channel.

〔Effect of the invention〕

As described above, according to the present invention, the called side also determines the free call channel, and the calling side and the called side connect the wireless line to the same free call channel from among a plurality of free call channels. As a result, erroneous determination of an empty call channel is less likely to occur, which reduces the probability of re-connecting the wireless line and shortens the time required to connect the wireless line.

[Brief explanation of the drawing]

FIG. 1 is a conceptual diagram of a wireless communication system, FIG. 2 is a flow chart of a wireless line connection method according to the present invention, and FIG. 3 is a block diagram showing an embodiment of a wireless communication device according to the present invention. 1a, 1b...Radio device 101...Radio channel 11...Antenna switching circuit 12...Receiver 13...Synthesizer 14... Transmitter 15...Determination circuit engineer 6...Control circuit 17...Storage means 20...Antenna and above Applicant Seiko Electronic Industries Co., Ltd. Agent Patent attorney Takayuki Hayashi Dynamic line machine 1a Radio machine ib figure 2

Claims (1)

[Claims] In a wireless communication system that has multiple call channels and at least one control channel, the wireless communication device used repeatedly determines whether a call channel is free during standby, and collects call channel number information that is determined to be a free call channel. When a call is made, the wireless communication device that is the calling side transmits the stored vacant call channel number information on the control channel, and on the other hand, the wireless communication device that is the called side compares and matches the plurality of free call channel number information sent from the calling side wireless device with the free call channel number information it owns, and selects one piece of the same free call channel number information. This is determined as the call channel and sent to the calling side wireless communication device as call channel number information on the control channel, and then the calling side wireless communication device and the called side wireless communication device A wireless line connection method characterized by starting communication on a channel indicated by channel number information.