JPH01288027A - Communication device - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a communication device, particularly a fixed station connected to a predetermined communication line, and a communication line and a predetermined system that are wirelessly connected to the fixed station and connected via the fixed station. The present invention relates to a communication device comprising a mobile station and a mobile station that communicate with each other.

[Prior Art] Conventionally, as the above-mentioned communication device, a wireless connection is established between a fixed station (base unit) and a mobile station (child 4L!) connected to a line, and communication between the mobile station and the line is performed. Cordless telephones for making calls are known. FIG. 10 shows the structure of a conventional cordless telephone. In FIG. 10, reference numeral 30 is a subscriber line, and a fixed station 20 is connected to this communication line 30. In FIG.

The fixed station 20 has a wireless connection section 8, and is wirelessly connected to a mobile station 29 having a similar wireless connection section to input and output audio signals during a call. Thereby, it is possible to make a call with (the other party's station via) the communication line 30 via the mobile station.

Since the communication channel between the fixed station 20 and the mobile station 29 performs full-duplex communication, an uplink channel UC and a downlink channel DC using different frequency bands are set.

In addition to communication channels, control channels are set for calling, receiving, and line control. The control channel is configured using a different frequency band from the communication channel. In the case of one-to-one communication between a fixed station and a mobile station, the control channel is used only during periods when no calls are being made. Therefore, in such a system, the wireless connection section 8' of the fixed station 20 or a similar wireless connection section of the mobile station can communicate via either the communication channel or the control channel by switching the frequency control circuit or the like. It is configured.

Additionally, in the past, in addition to one-to-one communication between a fixed station and a mobile station, MCA (Multi-Channel Access) system is used. MCA
The method is to set multiple communication channels that can be used between a fixed station and a mobile station for both speech channels and control channels, scan each channel with the fixed station or mobile station, and select a speech or control channel that is not used for communication. This method is used as

Furthermore, in order to connect a plurality of mobile stations to one fixed station, a method of setting an ID code for identifying the mobile stations has also been considered.

Next, we will briefly explain the operation of the conventional code response shown in FIG. When the mobile station 29 receives the synchronization signal, system code, and confirms that it can make a call, the mobile station 29 receives the synchronization signal, the system code, and the mobile station! D. Send a control signal consisting of a calling signal, etc.

Upon receiving this control signal via the wireless connection unit 8', the fixed station 20 checks the ID code, outputs a call response signal if it satisfies a predetermined standard, and scans for an available communication channel. , transmits a signal specifying the communication channel to be used for communication.

Upon receiving the channel designation signal, the mobile station 29 switches from the control channel to the communication channel and waits for a loop check signal (connection confirmation signal). When it confirms that the wireless connection is completely established by this signal, it sends a confirmation response. A signal is transmitted to complete the call connection of the wireless connection, the loop of the connected subscriber line (there may be a plurality of lines) 30 is closed, and the call connection between the subscriber line 30 and the mobile station 29 is established.

At this stage, the same situation is created as when the operator picks up the handset in a normal wired telephone.

Here, dial data is transmitted to the fixed station using a communication channel in response to dialing. The fixed station outputs the dial signal transmitted as a voice signal to the communication line 30 to call the other party's station. Thereafter, the conversation is carried out in the same way as in a normal telephone.

When the call ends and the mobile station 29 hooks off the handset (or a corresponding operation), the mobile station 2
9, a call termination signal is transmitted using the uplink channel of the communication channel. This allows the fixed station 20 to connect to the communication line 30.
loop, outputs a disconnection signal via the downlink channel, and ends the wireless connection process.

Conversely, when a call is received from the communication line 30 to the fixed station 20, the fixed station 20 first performs a channel scan to find an empty communication channel, and - sends a channel designation signal to the mobile station. However, in the same way as described above, a loop check is performed on this channel with the mobile station to confirm wireless connection, and then an RG activation signal (signal for ringing the mobile station's bell) is output.

The mobile station 29 thereby generates a paging signal and waits for the operator to hook-off or for a predetermined waiting time to time out. If there is a hook-off, the mobile station 29 transmits a hook-off signal to the fixed station and closes the loop of the communication line 30. The call operation continues until hook-on or a disconnection signal is received from the fixed station.

When a hook-on signal is transmitted from the mobile station 29 at the end of the call, a line loop is opened and a disconnection signal is transmitted to the mobile station, thereby terminating the process.

[Problems to be Solved by the Invention] As mentioned above, in the multi-channel access system, multiple systems consisting of fixed stations and mobile stations can operate within the same zone, but in this case, once registered with one fixed station, other systems can operate. Even if a mobile station is registered with a fixed station, it can be connected to the line with the same treatment.

Therefore, there may be cases where there are more mobile stations in one fixed station area than the number of lines connected to the fixed station.For example,
If a mobile station that should originally belong to another fixed station is registered redundantly to a fixed station that has already registered the same number of mobile stations as the number of lines, a conflict will occur between the mobile stations and the first registered mobile station will be registered. Problems may arise, such as mobile stations that have previously been using the network having to wait for a line to become available.

Furthermore, in most conventional systems, communication is carried out on a one-to-one basis between a fixed station and a mobile station. Since only one of these channels can be used, communication control using the control channel is not possible during a call. Therefore, when more mobile stations than the number of lines connected to the fixed station enter the fixed station area and all the lines are in use, even if a station with some priority interrupts and attempts to communicate, There was a problem in that fixed stations could not be accessed and communications could not be made.

In addition, in conventional devices, the ID code of the mobile station is registered using memory such as RAM so that the registration of the mobile station with respect to the fixed station can be easily rewritten, but in order to save the data, the ID code of the mobile station is Power must be supplied to this memory, and a backup power source is also required to cope with situations such as a power outage, complicating the configuration of the fixed station and increasing manufacturing costs.

The object of the present invention is to solve the above problems.

[Means for Solving the Problems] In order to solve the above problems, the present invention provides a fixed station connected to a predetermined communication line, and a communication line connected to the fixed station wirelessly via the fixed station. and a communication channel for performing communication in a device-defined manner, which is comprised of a mobile station that performs communication in a prescribed manner.

A control channel for transmitting and receiving control signals for controlling the communication processing of the predetermined method is set, and a first wireless connection section for accessing the control channel independent of a first wireless connection section for accessing the communication channel is set in the fixed station. A configuration with two wireless connections was adopted.

[Function] According to the above configuration, since a wireless connection unit dedicated to the control channel is provided, even if the maximum number of communications that can be handled by the fixed station is being performed, if another mobile station requests communication. Since the fixed station can be accessed via the control channel, processing such as forcibly terminating the communication of a mobile station in progress becomes possible.

[Example] Hereinafter, the present invention will be described in detail based on an example shown in the drawings.

Figure 1 shows a cordless phone system that adopts the present invention. Here, two systems are shown each consisting of one fixed station 2l, 22 and six mobile stations 23, 24 and 25, 26, two each being registered and connected to these fixed stations. In the figure, numerals 13 and 14 are fixed stations 21, respectively.

There are 22 wireless zones. The mobile stations 23 to 26 each have an ID code of 3 digits as shown in the block (however, to simplify the explanation, the ID code is assumed to be 3 digits).
112'', r221J, and ``222'', and these ID codes are registered in the memory of each mobile station.

The structure of the mobile station is the same as the conventional one, and detailed explanation will be omitted here. On the other hand, the fixed stations 21 and 22 are configured as shown in FIG.

In FIG. 2, the communication line 31 (or 32) is connected to a fixed station l.
It is connected to the line interface circuit 4 of.

The line interface circuit 4 includes an incoming call detection circuit, a line connection control circuit, a speech network circuit, and the like. The line interface circuit 4 also includes a dial signal sending unit that sends a dial signal (pulse or tone signal) corresponding to the dial data given from the control unit 6 to the communication line 3.

Line interface circuit 4 is connected to wireless connection section 8 . The wireless connection section 8 includes a control channel connection circuit, transmission and reception amplifiers, and the like.

It is composed of for example'#! When F#-3 calls can be made at the same time, the system is configured so that three sets of call channels, one uplink and one downlink, can be accessed simultaneously (of course, channel access may be done by time division). .

On the other hand, the control channel connection section 8a is provided independently of the speech channel connection section 8b, unlike the conventional case. That is 1
Even if the call channel connection unit 8a has made a predetermined number of calls, it can still accept calls from new mobile stations.

An antenna A1 is connected to the wireless connection circuit 8.

The operation of the fixed station I is controlled by a control section 6 consisting of a microprocessor or the like. The control unit 6 includes a ROM6a,
It has a RAM 6b, the ROM 6a is used to store a control program to be described later, and the RAM 6b is used as a work area for the control unit 6. The control unit 6 is connected to an operation unit 7 that includes a numeric keypad, a display, a speaker used to generate a ring tone, a warning sound, and the like. The operating section 7 is constructed as shown in FIG.

In FIG. 3, reference numeral 104 is a numeric keypad for inputting dial data. A registration key 106 and a clear key 102 are provided below the numeric keypad 104.

Registration key 106 is mobile station I for EEPROMI 1.
It is used to control the registration of the D code and priority order, which will be described later. The clear key 102 is used for clearing the above-mentioned registration or re-dial data.

In FIG. 1, fixed stations 21, 22 can each be connected to two communication lines 31, 32, and can communicate simultaneously with two mobile stations 23, 24 and 25, 26 between the lines. In that case, it is also possible to register two or more mobile stations to the fixed station 21, 22. For example,
In addition to the mobile stations 23 and 24 for the fixed station 21, the mobile station 2
5.26 can be registered.

In this case, if only registration is performed, there will be competition among mobile stations, as described in the section on the conventional example, and there is a risk that communication will be impossible. For this reason, in this embodiment, a desired priority order is set in addition to the identification code at the time of mobile station registration using the procedure shown in Figure $4, and communication processing is controlled in accordance with this priority order. It is assumed that the fixed station control procedures shown in FIG. 4 and subsequent figures are stored in the ROM 6a in FIG. 2.

Registration key 1 as shown in step 2 St in FIG. 4(A)
When 06 is pressed, mobile station registration processing begins. First, in step S2, the data input after the registration key is buffered in a register, and then in step S3, the input data is converted to a predetermined administrator code, such as the operator number or system number of the fixed station to be registered. Determine if there is a match.

If step S3 is affirmative, the process proceeds to step S4, where the identification code of the currently registered mobile station is displayed on the display section of the control unit 7.

Next, the operator inputs the ID code of the newly registered mobile station and the desired priority data. This input is the third
The input is performed using the numeric keypad 104 shown in the figure, and the input is determined in steps 85 to S9.

In step S5, the ID code of the mobile station, for example, the fixed station 2
When newly registering mobile stations 25 and 26 in 1,
r221J to r222. Determine whether + etc. have been input. When the ID code is input, step S6
If no input is made, the process advances to step Sll.

In step S6, it is determined whether an ID code with a predetermined number of digits (3 digits in the case of FIG. 1) has been input, and if the predetermined number of digits has not been input, the process returns to step S5, and an ID code with a predetermined number of digits is input. The process then proceeds to step S7.

In step S7, it is determined whether or not a priority order has been input. For example, priorities! , 2, . . . and so on. If there is a priority input, Figure 4 (B
). If the priority order is not input, the process proceeds to step S8. In step S8, it is determined whether the clear key l'02 has been pressed. If the clear key is pressed, the process advances to step 512; if the clear key is not pressed, the process advances to step S9.

In step S9, it is determined whether the registration key 106 has been pressed again. If the registration key is not pressed, step S7
Return to If the registration key is pressed in step S9, that is, if the registration key 106 is pressed without priority input in step S7, step SIO
, a code lower in priority than each mobile station corresponding to the currently registered ID code (lowest priority during registration) is stored in the EEPROM II. Note that if the priority order is not specified, the highest priority order may be automatically selected instead of the lowest priority order in step SlO.

When the clear key 102 is pressed in step S8, the process advances to step S12, and if there is an input identification code, it is deleted from the EEPROM II.

Also, if there is no identification code, the input identification code is cleared from the register on the buffer. In step 313, it is determined whether there is any key human power. If not, the registration process is terminated, and if there is any key human power, the process returns to step S5.

On the other hand, if the priority order is input in step S7, it is determined in step 514 of FIG. 4(B) whether the registration key 106 has been pressed.

If the registration key is not pressed, the process advances to step S7, and if the registration key is pressed, the identification code input so far is stored in the EEPROMI 1 in step 315 together with the input priority code.

In the manner described above, registration processing can be performed for a certain fixed station to store an identification code and a code indicating priority in the EEPROM II. If priority input is omitted,
Settings are made so that the priority is the lowest among automatically registered mobile stations.

Using the registered ID code and priority order, communication can be controlled using the following procedure.

Figures 5 (A) and (B) show the basic processing procedures of the fixed station and mobile station.The fixed station procedure is connected to the ROMGa, and the mobile station procedure is connected to the mobile station control unit (not shown). It is assumed that the data is stored in a ROM or the like.

When the power of the fixed station is turned on, the control unit 6 of the fixed station
The procedure shown in Figure (A) is carried out. First, in step 316, a general notification signal is transmitted to the control channel via the control channel connection section 8b, and then, in step S17, a standby operation is started. Here, by the processing in steps 318 and 519, it is determined whether the mobile station is calling or receiving a paging signal from the line. If there is a call from a mobile station, step 5
If a paging signal is received from line 0, which performs the process of calling the mobile station in step S20, the process moves to the mobile station incoming call process of step S21.

On the other hand, when the power of the mobile station is turned on, the control section of the mobile station first performs initial settings of each part of the device in step S22 of FIG. 5(B), and then performs a control channel acquisition operation in step S23.

Here, a certain control channel is selected in step 324, and the system code of the fixed station transmitted to that control channel is determined in step S25, and the process moves to the standby operation in step S26. If the system code is not correct in step 525, channel setting is performed again in step S24.

In the standby operation, in steps S27 to S29, the handset goes off-hook, and a channel designation signal and an incoming call signal are received from the fixed station.

Determine whether or not the communication area is out of range by determining the signal level of the control channel, etc. If off-hook, proceed to the calling operation of step 330, and if there is an incoming call, proceed to step S
If it is determined that the call is outside the communication range, the process returns to step 323, and the setting process is performed again from acquisition of the control channel.

Hereinafter, with reference to FIG. 6 onwards, the above step S21.5 will be explained.
20 (fixed station call incoming and outgoing call processing) and step S31
, S30 (mobile station incoming and outgoing call processing) will be explained in detail.

In the following explanation, communication on the communication channel of the fixed station is performed via the communication channel connection section 8b, and various control signals (general notification signal, RG activation signal, call request signal, etc.) are all transmitted through the control channel connection section. 8a. The control channel connection section 8b is different from the conventional one in that it is possible to access the control channel without the need for channel switching even if as many calls as the fixed station limit are being made at the same time.

Next, FIGS. 6(A) to 6(C) show the procedure for processing a call by the fixed station to the mobile station in step S21 of FIG. 5(A) when there is a call from the line.

The control unit 6 of the fixed station first determines whether or not there is a free call channel in step S32. If there is a free call channel, the control unit 6 of the fixed station closes the line loop in step S33.
At 4.335, it is determined whether a second dial (mobile station number) has been transmitted from the partner station via the line. If the second dial is received, E is selected in step S36.
It is checked against the ID code stored in the EPROMII to see if the mobile station is registered. If the mobile station is not registered, the line loop is opened in step 338, and the process returns to standby operation in step 838'.

If the corresponding mobile station is registered, in step S37 a channel designation signal corresponding to the vacant communication channel is transmitted to the mobile station designated by the second dial,
When a loop check is performed in steps S39 and 340, and a loop check acknowledgment signal is transmitted from the mobile station, the process proceeds to step 541, where an RG activation signal is transmitted to the mobile station to generate a ring tone. Thereafter, off-hook of the mobile station is detected in step S42. If the call is off-hook, the process advances to step S43, but if the call remains on-hook, a timeout of the predetermined calling time is determined in step 548. If the calling time has not timed out, the calling continues from step S41, and in the case of timeout, the line loop is opened in steps 849 to S51.
Determine transmission of a disconnection signal to the mobile station and reception of a corresponding end-of-call signal. When the process progresses to the reception of the end of the call, the process shifts to a standby operation in step S52.

If there is a mobile station off-footer in response to the call, it is determined in step 343 whether the called mobile station has the highest priority by referring to EEPROMI. If the priority is the highest, the process proceeds to step S44 for a telephone call operation. If it is not the highest priority, the process advances to step S61.

In the case of the highest priority, when the 0 call process is entered in which the call operation in step S44 is performed unconditionally, step 345 is executed.
- 347, a timeout of a predetermined call time (although this need not be provided), an on-hook on the line side, and a call termination signal from the mobile station are detected, respectively. In case of timeout and line side off-hook, step S57
In the subsequent disconnection process, or if a call end signal is received, the process moves to the call end operation in step 353. The cutting operation is performed in steps 358 to S60, and the cutting operation is performed in steps 349 to 349 described above.
This is realized by exactly the same process as S51.

On the other hand, the call termination operation is realized by opening the line loop and transmitting a disconnection signal to the mobile station in step S54.355. When steps S55 and S60 are completed, the process moves to a standby operation in step S56.

On the other hand, if the priority of the mobile station called in step S43 is not the highest, step S61 in FIG.
Step 561 switches to a control channel and uses this channel to transmit a general broadcast signal.Next, step S62 determines whether another mobile station is making a call request. If there is a call request, the process moves to step 575 in FIG. 6(C), and if there is no call request, the called party is made to perform a call operation in step S63. reception, call timeout, and on-hook on the line side.

If the results up to step 366 are negative, the process returns to step S62 to scan for another calling station.If the call time is 0 and the line is on-hook, the process moves to step S67 to disconnect. That is, in steps 368 to S70, if a call termination signal is received from the mobile station, which performs the disconnection process by the same process as in step 84 ONS51 described above, the process moves to step 371 to terminate the call operation. That is, in steps 372 and 573, the above step 3
54, perform the same processing as S55, step S70.57
3, the process returns to the standby operation in step S74.

After the call is initiated in step 363, step 562
When there is a call request from another station, step S in FIG. 6(C) is executed.
75, the ID code of the station requesting the call is EE.
0 to determine whether it is stored in PROMI 1
If the call requesting station is not registered, the process returns to step 363.

If the calling station ID is registered, step 2 S76
In step S80, it is determined whether the priority of the call requesting station is higher than that of the station currently talking. If the call requesting station has a lower priority, a call rejection signal is sent using the control channel in step S80. is sent to the call requesting station to reject the call.

If the station in use has a lower priority, the process advances to step 377, where a predetermined warning signal is output to the mobile station in use, and a call response signal is output to the mobile station making the call request. Allow the call.

In step S78, a predetermined period of standby is performed to give the station in progress a time to end the call, and then, in step 379, a disconnection process is performed to open a line loop by outputting a disconnection signal to the mobile station in progress. .

As described above, a call is received even to a mobile station with a low priority, and if a station with a higher priority than the mobile station requests a call during one call, the mobile station in the current call is Communication of the mobile station can be stopped.

Next, the routine for processing the call from the mobile station in step 520 of FIG. 5(A) is shown in FIGS. 7(A) to 7(C).
Shown below.

When a mobile station makes a call request, the ID code of the call requesting station is stored in the EEPROM in step S81 of FIG. 7(A).
Determine whether it is stored in I1. If the ID is not registered, the process moves to a standby operation in step 582. If the ID is registered, a call response signal is sent to permit the call in step S83.

Next, in step S84, a dial signal for calling the police or fire department is detected. When these emergency dialing signals are transmitted from the mobile station, step 5lo is unconditionally performed.
Proceed to step t to find an available call channel, and proceed to step 51.
02, the line loop is closed and the input dial signal is immediately transmitted.

If emergency dialing is denied in step S84, the line loop is closed in step S85.586, and the dial signal transmitted from the mobile station is sent to the line.

Step 587. In the loop from S98 to S5100, a predetermined period of off-hook on the line side is detected and a mobile station's call end signal is detected. If off-hook on the line side cannot be detected for a predetermined period of time, the process shifts to standby operation in step 5112. If there is an off-footer on the 0 line side, the process moves to step 388, transmits a call guide to the line, and proceeds to step 389 for wireless connection.

In step S89, a free call channel is searched for by channel scanning, and if there is a free call channel, step S89
0, a channel designation signal is transmitted to the mobile station to determine the communication channel to be used.

In steps S91 and 92, a loop check of the communication channel is performed, and if a wireless connection is established, step S93
to move to.

In step 393, it is determined whether the mobile station that made the call has the highest priority. Transfer step 51
If it is the highest level, the process moves to step S94.

In step S94, a call operation similar to that described above is performed.
During a call, in steps 395 to S97, a call end signal is detected, a timeout of one call time, and an off-hook on the line side (however, this detection may be omitted if it is desired to reduce the cost of the equipment). If a call termination signal is received, the same call termination operation as described above is performed in step 8108 (actual processing is in step 5109, S110); in the case of on-hook or timeout on the line side, the same operation as described above is performed in step 5104. A disconnection process is performed (the actual operations are steps 3104 to 3107), and when the disconnection or call termination process is completed, the process returns to the standby operation in step 5iti.

On the other hand, if the priority of the mobile station is not the highest, then
The process moves to step 3113 of B). Step 5113
~5126 and steps 5127 to 5132 in FIG.
is 'l!' in the incoming call to the mobile station. IJ6 diagram (B), (C
) are exactly the same as steps 361 to 380.

That is, after transmitting the general broadcast signal in step 3113, a call request from another mobile station is detected in step 5114, and if there is a call request, the process moves to step 5127 in FIG. 7(C).

If there is no call request, call processing begins in step 5115. Here too, a call-end signal, a call timeout, and an off-hook on the line side are detected in steps 5116 to 5118, and if the call-end signal is detected exclusively, a call-end operation is performed in step 3123 (actual operation is 5124.5125). In the case of side off-hook or timeout, step 5119 (actual processing is performed in steps 5120 to 3122)
), the disconnection process is performed, and the process returns to the standby operation at 5126.

During the call, the call request detection in step 5114 is repeated, and if there is a call request, the process moves to step 5127 in FIG. 7(C), where it is detected whether or not an ID has been registered for movement of the call request. I
If there is no D registration, the process returns to step 5115 for call processing.

In step 3128, the priorities of the call requesting station and the currently communicating station are compared, and if the priority of the call requesting station is lower, the call request is rejected in step 5132, and in step 5114
Return to

If the priority of the communicating station is low, a warning is issued to the communicating station in step 5129, and after waiting for a predetermined time in step 5130, the connection to the communicating station is cut off in step 5131, and the process proceeds to step 384 in FIG. 7(A). return.

Even when a mobile station makes a call as described above, by comparing the priorities, it is possible to give priority to the call or conversation from the station with the higher priority.

Next, control on the mobile station side will be explained with reference to the flowcharts of FIGS. 8 and 9. The procedures in FIGS. 8 and 9 show programs for a control section (not shown) of the mobile station.

FIGS. 8(A) and 8(B) are step 331 of FIG. 5(B).
This figure shows the mobile station's call receiving operation.

Upon receiving channel designation and incoming call instructions.

The mobile station switches to the designated communication channel in step 3133 of FIG. Waits for the ring tone to be generated and the operator to go off-hook.

If there is off-hook, an off-hook signal is transmitted to the fixed station in step 5139, and the process proceeds to call processing in step 5140.

First, in step 5141, a warning signal is detected. As described above, this detection signal is transmitted when the mobile station in the middle of a call has a low priority and the call is forcibly terminated. When the warning signal is sent, step 51 in FIG. 8(B)
50.

If no warning signal has been transmitted, on-hook detection is performed in step 5142. If the operator performs on-hook, the process moves to step 5147, a call termination operation.

If there is no on-hook, the process moves to step 3143.

In step 5143, it is detected whether a disconnection signal from the fixed station has been received. When the disconnection signal is received, a disconnection operation is performed in step gx<+, that is, a call termination signal is transmitted to the fixed station in step 5145.

On the other hand, in the end-of-call operation at step 5147, step 31
In step 48, a call termination signal is transmitted, and in step 5149, loop processing is performed to wait for a disconnection signal from the fixed station.When the disconnection signal is received, the process shifts to a standby operation in step 5146.

On the other hand, if a warning signal is received in step 5141, in step 5tso of FIG. etc., to alert the operator that a disconnection will occur.

Subsequently, in a loop of steps 3151 and 5152, a fixed station disconnection signal is detected and an overflow of the timer started in step 5150 is detected. If the timer overflows, the process returns to step 5150 and the warning sound is generated again. The time interval set in this timer may be any suitable time such as every few seconds.

When a disconnection signal is received, a disconnection operation is performed in step 5153, that is, a call termination signal is transmitted in step 5154, and the process returns to the standby operation in step 5155.

The mobile station incoming call processing described above is the same as before except for the handling of warning signals.If a warning signal is received during a call,
Since a mobile station with a higher priority than the own station is making a call, a warning sound is generated at predetermined intervals until the fixed station forcibly terminates the wireless connection, prompting the user to terminate the call.

Next, step 5 of FIG. 5(B) is shown in FIGS. 9(A) to (C).
30 shows a control procedure for mobile station call origination processing of No. 30.

The mobile station receives the general broadcast signal and detects an off-hook call in the loop of steps 3156 and 5157 in FIG. 9(A).

If a call is to be made, the process moves to step 5158 and a call signal is transmitted to the fixed station.

In the loop of steps 5159.5160.5175,
Detection of reception of call response signal from fixed station 1 Detection of call rejection signal and on-hook.

If a call response signal has been received, the process moves to step 3161. Based on the fixed station priority determination described above.

If a call rejection signal is received, the process moves to step 5181 in FIG. 9-1(B). If on-hook, the process moves to step 8176.

In step 5161, a call channel designation signal of the fixed station is detected, and if there is a channel designation, step 5
If the communication channel is not available and no channel designation is made at step 162, the process moves to step 5176'.

In step 5162, the communication channel is switched to the designated channel, and in step 3163, reception of a loop check signal is detected.

Once the wireless connection is confirmed, call processing begins in step 5165. That is, a warning signal from the fixed station is detected in step 8166, and if the warning signal is received, the process moves to step 5184 in FIG. 9(C).

If there is no warning, on-hook and fixed station disconnection signals are detected in steps 5167 and 5172, and in the case of on-hook, call termination processing is performed in step 3168 as in the case of FIG. 8(A) (actual processing (Call termination signal transmission and disconnection signal detection in step 5169.5A70), and when the disconnection signal is received, a disconnection operation is performed in step 5173 (call termination signal transmission processing in step 5174).

When steps 5170 and 5174 are completed, step 31
At step 71, the process shifts to standby operation.

On the other hand, if there is an on-hook before wireless connection in step 5175, an abort operation is performed in step 5177, that is, a call termination signal is transmitted to the fixed station in step 5178, and the process shifts to a standby operation in step 5180. .

Further, if the communication channel is not vacant in step 3161, the process moves to step 5176'', and a disconnection signal from the fixed station is detected. When the disconnection signal is detected, the process moves to a standby operation in step 5177''. If a disconnection signal is not received, the operator's on-hook status is detected in step 5176. If there is no on-hook in step 5176, the process returns to step 3161 to detect the channel designation signal, and if on-hook, the process proceeds to step 5177, where the process is abandoned.

If a call rejection signal is received in step 5iso, a timer for a predetermined time for calling is started in step 8181 of FIG. 9(B), and the operator is On-hook and an overflow of the timer started in step 3181 are detected. In the case of on-hook, the process moves to step 5177 in FIG. 9(A). In case of timer overflow, step 5156 of FIG. 9(A)
Return to

On the other hand, if a warning signal is received in step 3166, a warning sound is generated from the speaker in step 5184 of FIG. Start a timer that generates this warning sound. Then step 3185.31
Detection of fixed station disconnection signal at 86 and step 5
An overflow of the timer started at step 184 is detected.

When the disconnection signal is received, the process moves to step 5187, a disconnection operation. That is, in step 8188, a call termination signal is transmitted, and in step 3190, a standby operation is performed.
If a timer overflow occurs in step 186, a warning sound is generated again in step 5150.

As mentioned above, in the mobile station's call origination process, as in the incoming call process, if a warning signal is received during a call, a mobile station with a higher priority than the own station is making the call. ,
A warning tone is generated at predetermined intervals until the wireless connection is forcibly terminated by the fixed station, prompting the user to terminate the call.

According to the above embodiment, when a mobile station capable of making and receiving calls is registered in a fixed station, a desired priority order is stored together with an ID code, and communication is controlled based on this priority order, so that simultaneous Even if more mobile stations are registered in a fixed station than the number of mobile stations that can communicate with each other, priority can be given to the communication of mobile stations with a higher priority.

Furthermore, even if as many calls as the fixed station can handle at the same time have already been made, the fixed station has a call channel connection section 8b and an independent control channel connection section 8a, so channel switching is troublesome. It is possible to reliably detect calls from other mobile stations via the control channel without requiring additional processing, and to perform control based on the above-mentioned priority order.

Furthermore, since the ID code and priority order information can be changed freely, flexible operation is possible depending on the usage situation of the user.

In addition, ID code and priority information fixed station EE
The information is stored in PROM, which reduces the power consumption of the fixed station and eliminates the need for a backup power source, making the device configuration simple and inexpensive. Furthermore, registered information can be reliably retained even in the event of a power outage. If power is supplied to the EEPROM II at least only when the EEPROM is accessed, the effect of reducing power consumption can be enhanced.

Furthermore, even if you omit entering the priority order when registering a mobile station, the lowest (or highest) priority can be automatically set during registration, allowing communication control based on priority. It has an excellent effect in that it can be carried out reliably.

Although the above example illustrates the configuration of a cordless phone,
The communication method is not limited to this, and the present invention can be applied to various devices such as cordless terminals and facsimiles that perform processing via similar wireless connections.

[Effects of the Invention] As is clear from the above, according to the present invention, a fixed station connected to a predetermined communication line and a fixed station wirelessly connected to the fixed station perform communication in a predetermined method with the communication line via the fixed station. a communication channel for performing communication in a predetermined method between the fixed station and the mobile station, and control for transmitting and receiving control signals for controlling communication processing in the predetermined method; a first wireless connection for accessing the communication channel and a second wireless connection for accessing the control channel independent of the fixed station;
Since the wireless connection section is dedicated to the control channel, even if the maximum number of communications that can be handled by the fixed station is being carried out, another mobile station can When communication is desired, the fixed station can be accessed via the control channel, so
It is possible to perform processing such as forcibly terminating the communication of a mobile station in progress, and has the excellent effect of smoothly processing communications by mobile stations that exceed the number of simultaneous communications that can be performed by a fixed station.

[Brief explanation of the drawing]

Fig. 1 is a block diagram showing the system configuration of a cordless telephone adopting the present invention, Fig. 2 is a block diagram showing the structure of the fixed station shown in Fig. 1, and Fig. 3 shows the configuration of the operation section of the fixed station. The explanatory diagrams shown in FIGS. 4(A) and (B) are flowcharts showing the mobile station registration process of a fixed station, and FIGS. 5(A) and (
B) is a flowchart showing the basic processing routines of fixed station and mobile station, respectively, and FIGS. 6(A) to (C)
7(A) to (C) are flowcharts showing the process of incoming calls from a fixed station to a mobile station, FIG. A) and CB) are flowcharts of the mobile station's call processing, Figures 9 (A) to (C) are flowcharts of the mobile station's call processing, and Figure 10 shows the structure of a conventional cordless telephone system. FIG. 4...Line interface circuit 6...Control unit 7...Operation unit 8...Wireless connection unit ll...EEPROM21, 22...
Fixed stations 23 to 25...Mobile stations 31 to 32...Communication line'--1=ノ■ (A) M with a separate coat of 1 μm clear photocoat 1 Figure 4 of the old station Figure 5 (A) 10% vJ Kinkome η shop's flow rate (B) (B) 6 The flow of the current flow is shown in Fig. 7 (A).

Claims (1)

[Scope of Claims] 1) A communication device consisting of a fixed station connected to a predetermined communication line, and a mobile station that is wirelessly connected to the fixed station and performs communication in a predetermined manner with the communication line via the fixed station. In,
A communication channel for performing communication using a predetermined method between the fixed station and the mobile station, and a control channel for transmitting and receiving control signals for controlling communication processing using the predetermined method are set, and the communication channel is set for the fixed station. A communication device comprising: a second wireless connection section for accessing the control channel, which is independent of a first wireless connection section for accessing the control channel. 2) means for storing identification information of a mobile station connectable to the fixed station together with information indicating a desired mobile station priority order, and storing information regarding the mobile station identification information and mobile station priority order in this storage means; means is provided in the fixed station to control incoming and outgoing calls and communication processing according to the priority order stored in the storage means, and information regarding the priority order is input when registering the identification information and mobile station priority order in the storage means. 2. The communication device according to claim 1, wherein a predetermined priority order is automatically set for the mobile station if the mobile station is not received. 3) The storage means is E
3. The communication device according to claim 2, wherein the communication device is composed of an EPROM.