JPH06268586A - Radio communications equipment - Google Patents

Abstract

PURPOSE:To improve the success probability at the arrival of a call by sending a response message for the reception of a call message and informing the effect and transferring to the initial state in the case that a speech channel allocation message is not received within prescribed time. CONSTITUTION:A radio base station sends a call message to the radio communications equipment through a control channel by a request from a public telephone line network normally. The radio communications equipment receiving the call message sends a response message replying the call message to the radio station. The radio base station receiving the response message from the radio communications equipment sends a speech channel allocation message. The radio communications equipment receiving it transfers to a speech channel designated by the message and returns a SAT and the speech is made available. When the speech channel allocation message cannot be received within a prescribed time, a buzzer is energized for a prescribed time and displays on a display device and transfers to the initial state.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wireless communication device such as an automobile / mobile phone device.

[0002]

2. Description of the Related Art In a stand-by state, an antenna-storing type portable telephone device often has an antenna housed therein, and when the call is originated from the local station, the antenna is pulled out and the call is generally made.

By the way, in a cellular communication system, baseband data (forward control channel message) is transmitted from a radio base station to perform control such as channel change, and this is received by a portable telephone device to perform various processes. I am trying to A call (Page) message is carried on this baseband data signal. The paging message is transmitted from the radio base station on the control channel through a predetermined system by dialing from the caller.

Thus, in the above-mentioned mobile phone, the call message can be received because the transmission power from the radio base station is large even when the antenna is housed, as shown in Japanese Patent Laid-Open No. 2-202237. In this case, even if a response message is transmitted in response to this paging message, the radio base station may not be able to receive the response message because the transmission power is extremely low. At this time, the wireless base station provides a voice notification service to the caller that the wireless communication device is out of the service area or the power is off, a service for recording a message (voice mail), etc. Although it will be carried out, in the mobile phone device, it is timed out while waiting for the next instruction (communication channel assignment message) from the wireless base station, and control is transferred to the standby state.

[0005]

However, in the above case, since the user of the portable telephone device cannot know whether or not the call message has been transmitted, the antenna must be left in the housed state. Became. In particular,
In the current system, when there is no response to the paging message, the radio base station transmits the paging message again. However, in the above state, even if the response message is transmitted again to the paging message, the radio base station The station was unable to receive this.

[0006]

A wireless communication apparatus according to the present invention comprises an informing means for informing the state of the apparatus, a means for transmitting a response message to a paging message received on the control channel, and the response. Means for detecting whether or not the call channel assignment message has been received on the control channel within a predetermined time after transmitting the message, and if the call channel assignment message can be received within the predetermined time, It has means for shifting to a designated speech channel and means for driving the notifying means to shift to the initial state when the speech channel assignment message cannot be received within a predetermined time.

[0007]

Since the present invention is configured as described above, since the wireless communication device can recognize the receipt of a call message, it can withdraw the retractable antenna and respond to the next call message. Becomes In addition, it becomes possible to hear the message by voice mail service.

[0008]

Embodiments of the present invention will be described with reference to the drawings.

FIG. 1 shows a block diagram of a wireless communication device in a cellular system, in which (1) and (2) are a receiving circuit and a transmitting circuit, which are connected to an antenna duplexer (3) and a voice processing unit (4) and joined. Basic wireless communication between a person and a wireless base station (not shown) is realized. A radio link connection for communicating with a mobile telephone switching center (not shown) is formed through a radio base station, and an interface with a public telephone communication network is established through the radio link connection. (5) is a data receiving circuit, which receives a forward control message from the output of the discriminator in the receiving circuit (1). (6) is a data transmission circuit, which is coupled to the transmission circuit (2) for encoding a data message in Manchester code format and transmitting it to a radio base station. (7) and (8) are antennas having different gains. One antenna (7) is a built-in device and has a large gain, and the other antenna (8) is one of the antennas in a retractable state. The gain is set to be smaller than that of the antenna (7).
(9) is an antenna switching circuit, and the other antenna (8)
One of the antennas is selected according to the storage status of the. In addition, the built-in antenna (7) is provided as described above, but it can be received when the transmission power is large even when it is stored in the retractable antenna, but it is narrow because the transmission power is significantly attenuated when transmitting. This is because a predetermined message may not be transmitted even within the range, and even if this antenna is housed, transmission and reception can be performed within the predetermined range. Reference numeral (10) is a storage detection circuit for detecting whether or not the antenna (8) is stored. Also,
(11) is an antenna drive circuit used when extending the antenna (8), and is extended by the power of a motor or the like. (12) is an indicator, (13) is a buzzer, (14)
Is a key circuit including numeric keys, send keys, and end keys. (15) is a control circuit composed of an 8-bit microprocessor, which sends and receives a data message for controlling each device in the wireless communication device through the data receiving circuit (5) and the data transmitting circuit (6), Storage detection circuit (1
The antenna switching circuit (9) is controlled based on the output of (0) and the antenna driving circuit (11) is controlled.

FIG. 2 is a sequence diagram of a main part of the cellular radio communication apparatus when an incoming call is made, which will be described below. Generally, upon request from the public telephone line network, the wireless base station transmits a paging message to the wireless communication device on the control channel. The wireless communication device that has received the paging message transmits a response message in response to this message to the wireless base station. Upon receiving the response message from the wireless communication device, the wireless base station transmits a call channel assignment message. Upon receiving this, the wireless communication device shifts to the call channel designated by the message, and the SAT (Supervision Audio T
one) is returned. When the wireless base station detects the return of the SAT, the alert message is transmitted on the communication channel. The wireless communication device that receives this sounds a ringer tone, and when the user responds to this by operating the send key or the like, it becomes possible to talk with the caller thereafter. By the way, in this system, if a response message cannot be received by the radio base station within a predetermined time after the call message is transmitted from the radio base station, the radio message is re-applied approximately 6 to 10 seconds after the first call message is transmitted. I try to send a message.

FIG. 3 shows a control circuit (1
In the flowchart of the program of the main part at the time of incoming call written in 5), the operation will be described based on this. First, when the power is turned on, the control circuit (15) sets “0” to the internal counter n (step S1), and the paging message transmitted from the radio base station in the subsequent standby state calls itself. Is checked (step S2). If the call message is for the own station, a response message is transmitted through the control channel (step S3). Next, wait for a call channel assignment message from the radio base station for 4 seconds (in a normal sequence, the time required from the reception of the call message to the receipt of this call channel assignment message is 4 seconds or less) (steps S4, 7), When the call channel assignment message is received within that time, the call channel is switched to the call channel designated by the channel and the SAT is returned (steps S5 and S6). When an alert message is received within a predetermined time after the return of the SAT, the buzzer (13) is sounded to notify the incoming call, and thereafter, the call is transferred to the caller in response to the user's response (step S11). When the call processing in step S11 is completed, other processing such as monitoring of the key circuit (14) (step S14) is performed, and the process returns to step S2 described above to enter the standby state.

If the above-mentioned call channel assignment message cannot be received within 4 seconds, 1 is added to the internal counter n to perform a reception error process (step S).
7-9). This reception error processing is, as shown in FIG.
If the value of the internal counter n is 1 (reception error for the first call message), the buzzer (13) is sounded for a predetermined time, the contents as shown in FIG. 5 are displayed on the display (12), and the retractable antenna ( If 8) is in the housed state, the antenna drive circuit (11) is driven to pull out the antenna (8) and select the antenna (8) (steps T1, T2, T5, T6). After this process,
After step 14, the reception standby state is resumed. Therefore, in the present invention, since the process from the reception of the first call message to the standby state is performed within 6 seconds, this antenna (8 ), It is highly possible that the exchange of messages with the wireless base station will be successful. still,
If it is again determined to be timed out in step S7 due to radio wave or physical obstacles in the surroundings, the internal counter n is set to "2" this time (step S8). Therefore, in the reception error processing in step S9, The buzzer (13) is sounded for a predetermined time, the contents of FIG. 6 are displayed on the display (12), and the internal counter n is returned to "0" (step T).
1-4). After that, the processes of steps T5 and T6 are performed as described above. It should be noted that the user can know that he / she did not receive the incoming call by looking at the display of FIG. 6, and can receive the voice mail service or the like.

If the alert message cannot be received within the predetermined time, reception error processing is performed in step 13. In this process, the buzzer (13) is sounded for a predetermined time, and the contents of FIG. 7 are displayed. On this display, the user can know that he / she did not receive the incoming call and can receive the voice mail service or the like, as described above.

By the way, the following cases can be considered as a case where this alert message cannot be received.

That is, all of the control channels are rarely used because the occupied time is short, but conversely, all of the communication channels are used because the occupied time is long. There is also a possibility. The channel range of this call channel differs depending on the base station, for example, one channel is 1 to 35 channels and the other adjacent channel is 3 channels.
If the channels are 6 to 70 and all of their own channels are used, the usage status of the call channel of the adjacent base station is checked, and if it is free, the control is entrusted to the adjacent base station. In such a case, when a call channel of an adjacent base station is assigned, the distance between the location where the wireless communication device is located and the adjacent base station is large, and the transmission power of the wireless communication device causes radio waves to reach that base station. If it does not arrive (the SAT cannot be returned), the above-mentioned state will occur.

In this case, it is necessary to take measures such as connecting a booster (device for increasing the transmission power).

[0017]

The present invention is configured as described above, and the success rate at the time of incoming a call becomes extremely high. Further, by recognizing that there is an incoming call, it is possible to know what the business is by a service such as a voice mail service, and convenience can be improved.

[Brief description of drawings]

FIG. 1 is a block diagram of a wireless communication device of the present invention.

FIG. 2 is a sequence diagram of a main part of the wireless communication device of the present invention.

FIG. 3 is a flowchart of a program of a main part of the wireless communication device of the present invention.

FIG. 4 is a flowchart of a program of a main part of the wireless communication device of the present invention when a call channel allocation reception error occurs.

FIG. 5 is a diagram showing an error display when a communication channel allocation reception error occurs in the wireless communication device of the present invention.

FIG. 6 is a diagram showing an error display when a communication channel allocation reception error occurs in the wireless communication device of the present invention.

FIG. 7 is a diagram showing an error display when an alert message reception error occurs in the wireless communication device of the present invention.

[Explanation of symbols]

 1 Receiving Circuit 2 Transmitting Circuit 3 Antenna Duplexer 7 Built-in Antenna 8 Storage Antenna 10 Storage Detection Circuit 11 Antenna Drive Circuit 12 Display 15 Control Circuit

Claims (1)

[Claims] 1. A control channel and a call channel are provided, and a call message is transmitted from the base station on the control channel, and a call channel assignment message is sent when a response to the call message is received within a predetermined time. In the wireless communication device used in the wireless communication system described above, a notification unit for notifying the state of the device, a unit for transmitting a response message to the paging message received on the control channel, and a unit for transmitting the response message After that, means for detecting whether or not the call channel assignment message has been received within the predetermined time on the control channel, and if the call channel assignment message can be received within the predetermined time, the message is designated by the message. A means for shifting to a call channel and the call channel assignment A wireless communication device, comprising: means for driving the notification means to shift to an initial state when a message cannot be received within a predetermined time.