JPS62258526A - Redio communication system - Google Patents

Abstract

PURPOSE:To improve the operating rate of a radio channel by allowing a communication equipment of a group selecting one among plural radio channels to select channels with priority other than the channel used by the group disabling to select the channel. CONSTITUTION:In applying the connection control for a radio communication equipment of the multi-channel system communicated by selecting any channel among plural radio channels including a special radio channel used by a radio communication equipment group of the signle channel system where the different specific radio channels assigned in advance are used for the communication, at first an idle radio channel exclusive for the multi-channel access system is checked and only when all exclusive radio channels are idle, an idle radio channel for the signle channel access system is checked and used.

Description

[Detailed Description of the Invention] [Objective of the Invention] (Industrial Application Field) The present invention provides a group of radio communication devices that can select and use any radio channel from among a plurality of radio channels, and The present invention relates to a wireless communication system in which a group of wireless communication devices that use a wireless channel share a plurality of wireless channels.

(Prior Art) Generally, a plurality of consecutive radio channels are allocated to a wireless communication system having a plurality of wireless communication devices. The usage of these multiple wireless channels can be roughly divided into two types depending on the configuration of the wireless communication device. This is a so-called non-gle channel system in which one set of wireless communication devices can use one wireless channel, and is used for general business radio applications such as taxis and the like. The other option is to select and use any wireless channel from among multiple wireless channels.
This is a so-called multi-channel access method, and is used, for example, in car telephones, personal radios, etc.

FIG. 7 shows an example of the configuration of a multi-channel access wireless communication device. 1 is an antenna, 2 is an antenna duplexer,
3 is a receiver, 4 is a transmitter, 5 is a synthesizer, and 6 is a control section.

In this system, a synthesizer 5 is indispensable in order to generate frequencies for a plurality of radio channels, and a large-scale control unit 6 centered on a microprocessor is required in order to perform complicated connection control.

On the other hand, since the single-channel system does not require the synthesizer 5 and is easy to control, the control section 6 is also simpler than that of the multi-channel access system.

An example of a single channel type connection control operation will be described with reference to the flowchart of FIG. 8. From the standby state (step 7), detect whether to make a call or not (step 8),
When making a call, a 11J (identification) code is sent (step 9), and when there is a response from the other party (step 1), the call state is entered (step 11). On the other hand, when there is an incoming call from the other party (Step 2), the system detects whether the sent ID codes match (Step 13), and if they match, a ring tone is generated (Step 14). When the operator turns on the call switch (step 15), the phone enters a call state (step 11).

Next, an example of the connection control operation of the multi-channel access method will be explained with reference to the flowchart of FIG. In the standby state (step 16), the control channel (hereinafter referred to as C-C
Step 17) to receive a call (hereinafter referred to as M), and in the case of a call (step 18), a call channel (hereinafter referred to as 5-C)
(abbreviated as Stellar 1 to 19).
), if this 5-CH is vacant or not, it cannot be detected by a noise squelch or carrier squelch detection circuit, for example. and confirmed availability 5-
When the CH code is transmitted (Step 22), and there is a response (Step 23), the channel is switched to the designated S-CH again (Step 24), and the communication state is established (Step 25).

On the other hand, when a call arrives (step 26), if the ID matches, a response signal is sent (step 28), and the specified 5-C
The mode is switched to H (step 29), and a ring tone is generated (step 30). When the operator turns on the call switch (
Step 31), and the call state is established (Step 25).

Note that if there is no outgoing or incoming call, or if there is an incoming call but the ID codes do not match, the synthesizer 5 and receiver 3 are turned off for a certain period of time (step 32). This is because the current consumption of a synthesizer is generally low, so the synthesizer is turned off for a certain period of time to save N current consumption during standby, and is usually called battery saving.

A single channel method is used when the same wireless communication system covers areas with high traffic, such as urban areas, and areas with low traffic, such as rural areas7. If you use a multi-channel access method, it will be difficult to deal with the situation.
In areas with low energy consumption, there was a problem in that the number of components such as synthesizers and channel access control circuits increased, and the use of expensive wireless communication devices with increased current consumption was a problem.

In addition, when using a multi-channel access method and a single-channel method together in a system that uses the same frequency group, the frequency of a certain single-channel wireless communication device can be
When a communication device is using the single channel wireless communication device, the single channel wireless communication device cannot be used, resulting in a problem that the wireless channel is inefficiently used.

(Problem that the invention attempts to solve) Misfire L! As mentioned above, A is a 7-stem system that uses the same frequency r & number # and uses a multi-channel access type wireless communication device and a single-channel type wireless communication device 7
'(In some cases, the problem that a multi-channel access method wireless communication device may interfere with the use of a single-channel method wireless communication device is removed, and a multi-channel access method wireless communication device and a single-channel method wireless communication device are An object of the present invention is to obtain a wireless communication method that can use wireless channels efficiently even when used in combination with a communication device.

[Structure of the invention]

(Means for solving problems) The present invention allows for multiple wireless channels to be selected.

(Operation) According to the above configuration, a group of wireless communication devices that can communicate by selecting one of a plurality of wireless channels selects the wireless channel used by a group of wireless communication devices that cannot select a wireless channel. Therefore, a wireless communication system that uses wireless channels efficiently can be obtained.

(Example) An example of the present invention will be described below with reference to the drawings. Components similar to those in the prior art are given the same reference numerals, and their explanations will be omitted. FIG. 1 shows connection control of a wireless communication device using a multi-channel access method using the present invention.
- Show chart. This 7CR-chart is obtained by adding steps 40 to 42 and deleting step 19 from the flowchart for connection control of the conventional multi-channel access wireless communication device shown in FIG. In other words, when checking the availability of 5-CHs, first check the availability of 5-CHs dedicated to multi-channel access method devices (steps 40, 20), only when all 5-CHs dedicated to multi-channel access methods are occupied. (Step 41), and checks the availability of the S-CH for the single channel system, which is a specific channel (Step 42).
．． 20), to be used.

The radio channels can be allocated arbitrarily here, and an example thereof is shown in FIG. Here, out of all 20 channels, C-CH
one S-CH dedicated to multi-channel access method.
It is assigned to 12 channels t-M 1 to M12 and 7 channels S-CH'ltS t to S7 for the sync channel system.

FIG. 3 is a flowchart showing the control of another embodiment of the multi-channel access type device of the present invention. If you are using single-channel 5-CHs Sl to S7 (step 50), set a timer (step 51), and when the timer times up after a certain period of time (step 52), Issue a warning that channel access will be performed (step 53), - cancel the carrier call and check whether channels M1 to Mt dedicated to the multi-channel access method are free (step 54); if there are, then Data indicating the channel number is transmitted to the other party (step 55), the communication is switched to that channel (step 56), and the conversation is continued on the multi-channel access dedicated channel (step 58).

Here, channel M+ dedicated for multi-channel access
If there is no free channel from Msz to Msz (step 54) or if the channel is switched to a free channel (step 56), the timer is reset (step 57).

By doing so, it is possible to shorten the time that the multi-channel access system device uses the single-channel system 5-CH, and increase the opportunity to use the single-channel system device.

Note that this operation may be performed by either the calling side or the receiving side, as long as it is performed uniformly on either the calling side or the receiving side. Furthermore, it is convenient to set the timer described above to be slightly longer than the time required for one communication. For example, in the case of a wireless telephone, the average length of a single call is about 3 minutes, so if you double the timer setting to 6 minutes, the call will be less likely to be interrupted, and conversely, the call time will be longer. If the channel is long, the channel is switched to 5-CH dedicated to multi-channel access, making it possible to use single-channel equipment.

FIG. 4 shows an example of wireless channel allocation.

In this distribution, the 5-CHs for single channel were distributed and arranged discontinuously. By doing so, it is possible to reduce the amount of interference between fixedly used single channel frequencies. This is because, for example, three neighboring houses are equipped with single-channel type equipment, and interference is likely to occur, but if the distribution is as shown in FIG. 4, the amount of interference will be reduced.

In the present invention, the single channel type device performs connection control as shown in FIG.

This flowchart is the same as the conventional flowchart for connection control of a single channel type device shown in FIG. 8, with step 6o added thereto. When you arrive and make a call (step 8), confirm whether or not the preset 5-CH of your own aircraft is available (step 60), and if it is available,
Send the D code (step 9).

FIG. 9 shows a 70-chart of another embodiment of the present invention.

If one of the single-channel type devices according to the present invention uses Sl, for example, and this 81 f is temporarily used by another multi-channel type device, the 81 cannot be used during that time; This eliminates the need to repeat the call operation many times by displaying a state in which the call cannot be made. This flowchart is obtained by adding steps 70 and 71 to the flowchart shown in FIG.

If your device's wireless channel is not available in standby mode, (
Step 70), Display occlusion\(Step 71)
). Here, the blockage (indication is shown by, for example, lighting up a light emitting diode).

In this embodiment, C-CH is always used, but C-CH may be used instead.

Further, a single-channel type device may be used as long as it is a single-channel type during functional operation; for example, a device in which the crystal oscillation frequency can be switched between 81 and 82 may be used.

Further, the ID code may be a digital signal, an analog signal (combination of tones), etc. as long as it can be identified, or it may be a group number that is set by yourself like a personal radio.

In addition, the multi-channel access system device shown in Figure @2 does not need to be able to use all of C, M+~M+ 2, Sr~S7, for example, C, M+~M
The combinations may be arbitrary, such as dividing into a group using 6 and a group using C, M7 to M12'fr.

Also, there may be only a calling operation, and this can be used, for example, in a terminal that automatically sends data.

As described in detail above, according to the present invention, a wireless communication system with high wireless channel usage efficiency can be obtained.

[Brief explanation of drawings]

Figures 5 and 6 are diagrams showing the operation of a single-channel wireless communication system according to an embodiment of the present invention, and Figure 7 is a diagram showing the configuration of a general multi-channel access wireless communication device. 8 is a flowchart showing the operation of a conventional single channel type wireless communication device, and FIG. 9 is a flowchart showing the operation of a conventional multichannel access type wireless communication device. l...Antenna, 2...Antenna duplexer, 3...
Receiver, 4... Transmitter, 5... Synthesizer, 6.
...Control Department 0 Representative Patent Attorney Noriyuki Chika Yamashita - Figure 1 C - Controversy II Ii 1 Sayane Ishiku c-ct-t) M175
tMf2-Multi to South Rare One side & 0 exclusive one word za Yne Jν - CM) Sl to: s7... Shinkle b → Le Hojuryo place of collapse θpu 1 # Duyanel (:3 -CH) Figure 2 Figure 4 Figure 7 Figure 6 Figure 6

Claims (4)

[Claims] (1) At least one set of first wireless communication devices capable of communicating using different specific wireless channels allocated in advance, and one of the plurality of wireless channels including the specific wireless channel. Select at least one communicable
a second group of wireless communication devices, and the second group of wireless communication devices preferentially selects at least a wireless channel other than the specific wireless channel from among the plurality of wireless channels. A wireless communication method characterized by the use of (2) The second wireless communication device group preferentially selects and uses wireless channels excluding a specific wireless channel from among the plurality of wireless channels, and when using the specific wireless channel, Claims characterized in that it monitors whether or not there is an empty wireless channel among wireless channels other than the specific wireless channel, and if there is an empty wireless channel, the channel is switched to this empty wireless channel. The wireless communication method described in paragraph (1). (3) The wireless communication system according to claim (1) or (2), wherein the specific wireless channel is a wireless channel in which each frequency band is discontinuous. (4) The first wireless communication device group monitors during standby whether or not the pre-allocated specific wireless channel is being used by another wireless communication device, and if it is being used,
The wireless communication system according to claim (1), (2), or (3), characterized in that it is equipped with a display means for displaying this fact.