JPH099346A - Link channel establishing system - Google Patents

Abstract

PURPOSE: To allow the operator to recognize the presence of an idle slot and idle channel by means of an alarm tone or the like when an idle slot and an idle channel are produced by reporting periodically the presence of the idle slot and the idle channel from a radio base station. CONSTITUTION: A radio terminal equipment 9 is made up of a radio section 7 making communication with a radio base station 8, a display section 1 to provide information to the operator, an alarm tone generating section 2, an operation section 3, a voice processing section 4 processing transmission reception speech, and a control section 5 controlling the sections above. When the radio terminal equipment 9 makes a call to conduct communication, the terminal equipment 9 requests setup of a link channel to the radio base station 8. When no idle channel and no idle slot is available, it is reported and the radio terminal equipment 9 is in standby supervisory state. The radio base station 8 sends an information notice signal and information of idle slot and idle channel is added to the signal. The radio terminal equipment 9 uses the monitor section 6 to monitor the presence of the idle slot and idle channel and when the idle slot and idle channel exist through the reception of information, it is displayed or reported to the operate by an alarm tone.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a link channel establishing system, and more particularly to a link channel establishing system for wireless telephones.

[0002]

Link channel establishment is the first procedure for setting up a call between a wireless terminal device and a wireless base station, as shown in the second generation cordless telephone system standard (first edition). Done.

FIG. 3 is a flowchart showing an example of a conventional link channel establishing system.

When the wireless terminal device makes a call in the waiting state (S-1) where the wireless terminal device can make and receive a call, a link channel establishment request is transmitted from the wireless terminal device to the wireless base station (S-2). ).

The wireless base station transmits different messages to the wireless terminal device depending on the presence or absence of an empty slot or empty channel at that time (S-3). If there are empty slots and empty channels, the wireless base station transmits a link channel assignment, and specifies the used slots and used channels to the wireless terminal device (S-5). On the other hand, when there is no empty slot or empty channel, the wireless base station transmits a link channel allocation refusal (S-4), and the wireless terminal device becomes busy.

In JP-A-5-336034, when there is no empty slot or empty channel, the wireless base station stores the identification number of the wireless terminal that made the call request, and an empty slot and empty channel are generated. A method is disclosed in which a wireless terminal device is notified accordingly.

[0007]

According to the conventional link channel establishment method shown in FIG. 3, when a call is made from a wireless terminal device, if the wireless base station has no empty slot or empty channel, the call cannot be released. The wireless terminal device is in a busy state and needs to perform a call origination operation again, and the call origination operation must be repeated while waiting for the time until an empty slot and an empty channel occur.

On the other hand, the invention disclosed in Japanese Patent Laid-Open No. 5-336034 realizes a method of informing a calling party of an empty slot and an empty channel as soon as they occur, on the radio base station side. Therefore, if the wireless terminal device of the caller moves to the coverage area of another wireless base station before the empty slot and empty channel are generated, the information of the empty slot and empty channel generation from the wireless base station is generated. There is a problem that the wireless terminal device cannot receive the message.

The present invention has been made in view of the above points, and when there is no empty slot or empty channel in the radio base station, it is not necessary to repeat the calling operation until the empty slot and empty channel are generated, and An object of the present invention is to provide a link channel establishment method capable of notifying the occurrence of an empty slot and an empty channel even when the wireless terminal device moves to the coverage area of another wireless base station.

[0010]

In order to achieve the above object, the present invention adds information on empty slots and empty channels to an information broadcast signal periodically transmitted from a radio base station,
The wireless terminal device is provided with a monitoring means for receiving the information notification signal and monitoring the empty slot and the empty channel, and a notification means for notifying the operator, that is, the caller, of the occurrence of the empty slot and the empty channel.

[0011]

According to the present invention, when the monitoring means of the wireless terminal device monitors the information notification signal periodically transmitted from the wireless base station and receives the notification that there are empty slots and empty channels, the present invention has the above-mentioned configuration. Is notified to the operator by the notification means of the wireless terminal device.

[0012]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to the drawings.

FIG. 1 is a block diagram of an embodiment of a wireless communication system to which the link channel establishing system of the present invention is applied.

In FIG. 1, the wireless terminal device 9 includes a wireless unit 7 that wirelessly communicates with a wireless base station 8, a display unit 1 that provides the operator with visual information, and an alarm sound that provides the operator with auditory information. The generation unit 2, the operation unit 3 for the operator to operate the wireless terminal device 9, the voice processing unit 4 for processing a call for transmission and reception, the wireless unit 7, the display unit 1, the alarm sound generation unit 2, and the operation. The control unit 5 controls the unit 3 and the voice processing unit 4.

An empty slot / empty channel monitoring unit 6 for monitoring empty slots and empty channels is realized as one of the controls by the control unit 5. The wireless base station 10 is connected to the line from the exchange.

Next, the operation of the wireless communication system shown in FIG. 1 will be described with reference to the flowchart of FIG.

FIG. 2 is a flowchart showing a link channel establishing system in the wireless communication system shown in FIG.

When the wireless terminal device 9 is not in a call, it is in a waiting state in which outgoing / incoming calls can be made (F-1). Now, it is assumed that the wireless terminal device 9 is within range of the wireless base station 8. When making a call and making a call in this state, the operator makes a call operation through the operation unit 3. In response to this calling operation, the control unit 5 transmits a link channel establishment request to the wireless base station 8 via the wireless unit 7 (F-2).

The radio base station 8 changes the signal to be transmitted to the radio terminal device 9 depending on the presence / absence of an empty slot and an empty channel (F-3), and when there is an empty slot and an empty channel, the radio base station 8 determines the radio terminal device. The link channel allocation is transmitted to the terminal 9 (F-10). As a result, the call can be established in the designated slot and the designated channel (F-11).

If there are no empty slots or channels,
The wireless base station 8 transmits a link channel allocation refusal to the wireless terminal device 9 (F-4). The wireless terminal device 9 includes a control unit 5
The display unit 1 and the alarm sound generating unit 2 are controlled by means of this to notify the operator that there is no empty slot or empty channel (F-5). The operator cancels the call and the wireless terminal device 9
Enters the standby and empty slot / empty channel monitoring state (F-6).

The radio base station 8 is transmitting an information notification signal, and information of an empty slot and an empty channel is added to this signal (F-7). Upon receiving the information notification signal, the wireless terminal device 9 monitors the presence / absence of an empty slot and an empty channel by the empty slot / empty channel monitoring unit 6 (F-
8) If there are no empty slots and empty channels, wait and continue the empty slot / empty channel monitoring state (F
-6). If there are empty slots and empty channels, the operator is notified of that fact by displaying and an alarm sound (F-
9). The operator may call again when receiving the notification of the occurrence of this empty slot and empty channel.

When the wireless terminal device 9 moves from within the range of the wireless base station 8 to within the range of the wireless base station 10 during the standby and empty slot / empty channel monitoring state (F-6), the wireless base station 10 also receives the wireless base. Since the information of the empty slot and the empty channel of the station 10 is periodically transmitted by the information broadcast signal, the wireless terminal device 9 receives the information broadcast signal when the wireless base station 10 has the empty slot and the empty channel. You can know that.

[0023]

As described above, in the link channel establishing system according to the present invention, the information of the empty slot and the empty channel is added to the information broadcast signal periodically transmitted from the wireless base station, and the empty of the wireless terminal device is added. By monitoring this information notification signal by the slot / empty channel monitoring unit, when there is no empty slot or empty channel, it is possible to know that by the alarm sound and display when the empty slot and empty channel occur.

Since the empty slot / empty channel branch is provided not on the side of the wireless base station but on the wireless terminal device, the wireless terminal device covers the area covered by another wireless base station during monitoring of the empty slot and empty channel. Even when moving, if the wireless base station of the moving destination has an empty slot and an empty channel, the fact can be notified by the same method.

[Brief description of drawings]

FIG. 1 is a block diagram of an embodiment of a wireless communication system to which a link channel establishing system of the present invention is applied.

FIG. 2 is a flowchart showing a link channel establishing method in the wireless communication system shown in FIG.

FIG. 3 is a flowchart showing an example of a conventional link channel establishment method.

[Explanation of symbols]

 1 Display Unit 2 Alarm Sound Generation Unit 3 Operation Unit 4 Voice Processing Unit 5 Control Unit 6 Empty Slot / Channel Monitoring Unit 7 Radio Unit 8 Radio Base Station 9 Radio Terminal Device 10 Radio Base Station

Claims (4)

[Claims] 1. When establishing a link channel between a wireless terminal device and a wireless base station, when a call is made from the wireless terminal device,
When there is no empty slot or empty channel in the wireless base station, in the link channel establishment method of notifying the wireless terminal device of that fact, the wireless base station periodically notifies the presence or absence of an empty slot and empty channel, A link channel establishment method characterized in that, when the wireless terminal device receives a notification that there is an empty slot and an empty channel, it notifies the operator of that fact. 2. A radio base station, wherein the information broadcast signal transmitted periodically includes information on the presence / absence of an empty slot and an empty channel. 3. An empty slot / empty channel monitoring unit for monitoring the presence / absence of empty slots and empty channels from the wireless base station, and an empty slot / empty channel from the wireless base station by the empty slot / empty channel monitoring unit. A wireless terminal device, comprising: a notification unit for notifying an operator that there is an empty slot and an empty channel when it is detected that a notification that there is a channel is received. 4. The wireless terminal device according to claim 3, wherein the notification means includes a display means and an alarm sound generation means.