JP3234735B2 - Wireless communication device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a radio communication device used as, for example, a business cordless system.
In particular, it is intended to prevent call disconnection.

[0002]

2. Description of the Related Art FIG. 6 and FIG.
FIG. 1 is a schematic configuration diagram of a conventional wireless communication device similar to the content disclosed in Japanese Patent Publication No. 55-55, and a flowchart showing a processing operation of a mobile phone during a call. In FIG. 6, reference numeral 1 denotes a switch of a business cordless system, reference numerals 2a and 2b denote base stations, and reference numeral 3 denotes a line connected to a telephone line connected to the switch 1 via the switch 1 and the base station 2a. A mobile phone 4 capable of making an outside line call is a maintenance console connected to the exchange 1, and 5a and 5b are service areas in which the base stations 2a and 2b can wirelessly communicate.

[0003] In the above configuration, the mobile telephone 3 is connected to the line via the exchange 1 and the base station 2a for a call from the telephone line, and is capable of making an external call. You can move between areas. Hereinafter, processing during a call when the mobile phone 3 moves between service areas where wireless communication is possible while performing an outside line call will be described with reference to FIG. Now mobile phone 3
It is assumed that the user moves to the service area 5b of the base station 2b while making an outside call within the service area 5a of the base station 2a.

First, during a call, the service area 5a of the base station 2a in use is changed from the service area 5b of the peripheral base station 2b.
When the mobile phone 3 moves to an area that can communicate with the mobile phone, the mobile phone 3 measures the reception level of the carrier wave output from both the base station 2a in use and the peripheral base station 2b (step S).
71), The ratio of the carrier reception level between the peripheral base station and the base station in use is determined, and if the ratio is smaller than the specified reception level ratio set, the reception level is continuously measured, and the determined ratio is determined. If the reception level ratio is greater than or equal to the reception level ratio, a request to switch the communication channel to the peripheral base station 2b is made (step S
72, S73).

[0005] At this time, it is inquired whether or not there is a free channel in the peripheral base station 2b to be switched to. If there is no free channel, a warning sound can be emitted. The switching sequence is executed to request the peripheral base station 2b to establish a link channel, and based on the request, switching to the peripheral base station is performed (steps S74 to S76).

[0006]

However, in the above-mentioned conventional wireless communication apparatus, when moving from the service area 5a of the base station 2a in use to the service area 5b of the peripheral base station 2b at a high speed during a call, reception is not possible. There is a case where the time from the drop of the level to the disconnection of the call is short, and the warning sound cannot be made in time. Further, there is a case where a warning sound that is issued even when there is no available channel in the switching destination base station cannot be made in time. Further, a call during a call may be disconnected due to radio wave interference or the like. However, since no trouble information remains, there is a problem that it is difficult to grasp the situation.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-described problems of the conventional example, and provides a wireless communication apparatus capable of preventing disconnection of a call by notifying in advance that disconnection will occur during a call. The purpose is to:

[0008]

A radio communication apparatus according to the present invention comprises a plurality of base stations connected to an exchange, a plurality of base stations provided for each of these base stations, and a base station for calling from a telephone line. In a wireless communication device comprising a mobile phone that is connected to a line via an exchange, is capable of external telephone calls, and moves between service areas of each base station and is capable of wireless communication,
An alarm output unit for outputting alarm information to the mobile phone; a storage unit for storing a base station ID being used at the time of a call disconnection other than a normal sequence; and a base station ID being used is stored in the storage unit. Base station I stored
If the value is equal to D, the alarm output means outputs alarm information indicating that the user is in a service area where the call may be disconnected, and outputs the base station ID which was used when the call was disconnected other than in a normal sequence. And control means for storing the above in the storage means.

A storage means for storing the IDs of the base station and the portable telephone at the time of disconnection of a call other than the normal sequence, and the respective IDs of the base station and the portable telephone disconnected at the time of disconnection of the call other than the normal sequence. Is stored in the storage means.

Further, the storage means of the exchange stores the idle channel information of the adjacent base station, and the control means of the exchange determines that the adjacent base station having the empty channel based on the idle channel information of the adjacent base station during a call. If the alarm information does not exist, the alarm information is transmitted to the mobile phone, and the control means of the mobile phone indicates that when the alarm information is received from the exchange, moving from the alarm output means may disconnect the call. It is characterized in that the output of the alarm information is controlled.

[0011]

In the radio communication apparatus according to the present invention, the control means of the portable telephone causes the storage means to store the base station ID which was being used when the call was disconnected other than the normal sequence, and the base station ID which is being used is stored. If the mobile station holder ID is equal to the base station ID of the mobile phone, the alarm output means outputs alarm information indicating that the user is in a service area where the call may be disconnected. Announce that you are in a potential service area and prevent call disconnections.

Further, the control means of the exchange stores the IDs of the base station and the portable telephone which have been disconnected during the disconnection of the call other than the normal sequence in the exchange side storage means, so that the contents can be maintained in response to a request from the maintenance console. It is displayed on the console, making it easy to grasp the situation.

[0013] Further, the storage means of the exchange stores the vacant channel information of the adjacent base station and, by the control means of the exchange, the adjacent base station having the vacant channel based on the vacant channel information of the adjacent base station during a call. When the alarm information does not exist, the alarm information is transmitted to the mobile phone, and the control means of the mobile phone indicates that when the alarm information from the exchange is received, the movement from the alarm output means may disconnect the call. By controlling the output of the alarm information, the mobile phone holder is notified that the call is disconnected due to the movement, and the disconnection of the call is prevented.

[0014]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to the illustrated embodiments. FIG. 1 is a schematic configuration diagram of a wireless communication device according to an embodiment of the present invention. In FIG. 1, the same parts as those of the conventional example shown in FIG. 6 are denoted by the same reference numerals, 1 is an office cordless system switch, 2a and 2b are base stations, and 3 is a telephone line connected to the switch 1. A portable telephone connected to the line via the exchange 1 and the base station 2a for a call and capable of making an external call is connected. A maintenance console 4 is connected to the exchange 1 and capable of displaying a call disconnection record. This is a service area of a mobile phone capable of wireless communication with 2a and 2b. Further, as a new code, reference numeral 6 denotes a display unit of the mobile phone 3 for displaying various types of alarm information.

As shown in FIG. 2A, the exchange 1 includes a CPU 1a as control means, a ROM 1b storing a processing program and fixed data, and a base station in use as shown in FIG. RA that temporarily stores the adjacent base station member list storing the idle state of each channel of the adjacent base station member and other processing data, input data, etc.
M1c, an interface 1d for inputting / outputting signals to / from the maintenance console 4 is built in. Similarly,
As shown in FIG. 2B, the mobile phone 3 has a built-in CPU 3a as control means, a ROM 3b storing processing programs and fixed data, and a RAM 3c temporarily storing processing data and input data. The display unit 6 is connected to the bus.

The adjacent base station member list shown in FIG. 3 stored in the RAM 1c includes the base station 2 shown in FIG.
Channel base states other than a and 2b are also stored, and each base station has a predetermined number of channels (only three channels CH1 to CH3 are shown in FIG. 3). Depending on the line connection state with the mobile phone in the base station, the channels CH1 to CH3 are set by the CPU 1a.
Is set to "ON" when the channel is in use in the storage area, and is set to "OFF" when it is unused and unused.

Next, the operation according to the above configuration will be described. Now, the mobile phone 3 is in the service area 5 of the base station 2a.
It is assumed that the user moves to the service area of an adjacent base station while performing an outside line call within a. In this case, it is assumed that adjacent base stations exist in addition to the base station 2b shown in FIG. First, the in-call processing of the exchange 1 is performed by the R in the exchange 1.
This will be described with reference to the operation flowchart of FIG. 4 which is stored in the OM 1b and controlled by the CPU 1a. While the mobile telephone 3 is talking with the other party's telephone connected to the telephone line via the base station 2a and the exchange 1, the exchange 1
The adjacent base station for the in-use base station 2a is searched with reference to the adjacent base station member list shown in FIG. (Step S42).

If there is no adjacent base station having an available free channel, the portable telephone 3 is connected via the base station 2a.
The alarm information is transmitted to (step S43). On the other hand,
When there is an adjacent base station having an available vacant channel or after the above step S43 , the built-in timer is started, and thereafter, when the received wave electric field strength is reduced from the mobile phone 3, the signal is automatically transmitted. When a call continuation request is received, the above-described steps S41 and subsequent steps are executed (step S45). Also, there is no call continuation request,
When the timer times out, steps S41 and subsequent steps are similarly executed (step S46).

During the set time of the built-in timer, steps S45 to S47 are repeated unless the call is disconnected. If the call is disconnected in step S47,
It is determined whether or not the disconnection is based on a normal sequence, that is, whether or not the disconnection is based on a disconnection request from the mobile phone 3 (step S48). If the base station ID and the mobile phone ID are not based on the normal sequence, the base station ID and the mobile phone ID for which the call was disconnected as the identification information of the last used base station and the mobile phone are set to R.
The contents are stored in a call disconnection information storage area (not shown) in the AM 1c, and the contents thereof can be displayed on the maintenance console 4 in response to a request from the maintenance console 4 connected to the exchange 1 (step S49). The IDs of the base station and the mobile phone are stored and secured in a predetermined area in the RAM 1c when a line is connected. In this way, by outputting the base station ID and the mobile phone ID stored in the call disconnection information storage area in the RAM 1c using the maintenance console 4, the information of the base station having a large number of disconnections can be obtained by using the information. Preventive maintenance such as review of service areas can be performed.

Next, the processing during a call of the mobile phone 3 will be described with reference to the operation flowchart of FIG. 5 which is stored in the ROM 3b of the mobile phone 3 and controlled by the CPU 3a. As will be described later, the ID of the last used base station is stored in the RAM 3c of the mobile phone 3 when the call is disconnected during a call, except during a normal sequence. Based on the ID, it is determined whether or not the currently used base station and the stored base station are equal (step S51). The alarm A1 indicating "yes" is displayed, and a sounding means (not shown) is operated (step S52). Thus, the user of the mobile phone 3 can know that he or she is in the service area 5a where the call may be disconnected.

[0021] On the other hand, in step S 51, if not equal to the base station by the base station in use and stored or above
After step S52, it is determined whether or not alarm information transmitted from the exchange 1 via the base station 2a has been received when there is no adjacent base station having an available free channel ( step S52). S53) If received, the display unit 6 displays, for example, an alarm A2 indicating that "a base station that can be used in the vicinity does not exist" and activates a sounding unit (not shown) (step S54). This allows the user of the mobile phone 3 to know in advance that the call may be disconnected if the user moves.

[0023] In step S53, If no from exchange 1, such has been received alarm information or the step
After passing through the step S54, while the received wave electric field strength is measured and the electric field strength is lowered, a call continuation request is transmitted to the base station, and if the call is not disconnected, the steps S51 and the following steps are executed, When the call is disconnected during the call, the ID of the last used base station is stored in the RAM 3c at times other than the normal sequence, and the disconnection process is executed in the same manner as in the normal sequence (step S57).
To S59).

Therefore, according to the above-described embodiment, the base station ID used during the disconnection of the call other than the normal sequence is stored in the RAM 3c by the CPU 3a of the mobile phone 3, and the base station ID being used is stored. If the ID is equal to the base station ID, the alarm information indicating that the user is in a service area where the call may be disconnected is output from the display unit 6, and the CPU 1a of the exchange 1 outputs the vacant channel information of the adjacent base station. When there is no adjacent base station having an empty channel based on the idle channel information of the adjacent base station during a call, alarm information is transmitted to the mobile phone 3 and the CPU 3a of the mobile phone 3 is stored in the RAM 1c.
Thus, when the alarm information from the exchange 1 is received, the alarm information indicating that there is a possibility that the telephone call may be disconnected when the user moves from the display unit 6 is output controlled. It is possible to notify that there is a possibility that a call may be disconnected when the user is in a service area that may be disconnected or when the user moves, thereby preventing disconnection of the call. The CPU 1a of the exchange 1 stores in the RAM 1c the IDs of the base station and the mobile phone disconnected during a call disconnection other than the normal sequence, so that the contents are displayed on the maintenance console 4 in response to a request from the maintenance console 4. This makes it easy to grasp the situation.

[0024]

As described above, according to the present invention, the base station ID used at the time of disconnection of a call other than the normal sequence is stored in the storage means by the control means of the portable telephone, and the base station being used is stored. If the ID is equal to the stored base station ID, the alarm output means outputs alarm information indicating that the user is in a service area where the call may be disconnected, so that the call can be given to the mobile phone holder. The fact that the user is in a service area that may be disconnected can be notified to prevent disconnection of the call.

Further, the control means of the exchange stores the IDs of the base station and the portable telephone which have been disconnected when the call is disconnected in a sequence other than the normal sequence in the exchange side storage means, so that the contents can be maintained by a request from the maintenance console. The information can be displayed on the console and the situation can be easily grasped.

Further, the storage means of the exchange stores the vacant channel information of the adjacent base station and, by the control means of the exchange, the adjacent base station having the vacant channel based on the vacant channel information of the adjacent base station during a call. When the alarm information does not exist, the alarm information is transmitted to the mobile phone, and the control means of the mobile phone indicates that when the alarm information from the exchange is received, the movement from the alarm output means may disconnect the call. By controlling the output of the alarm information, it is possible to notify the cellular phone holder that the call will be disconnected due to the movement, and prevent the call from being disconnected.

[Brief description of the drawings]

FIG. 1 is a schematic configuration diagram of a wireless communication device according to an embodiment of the present invention.

FIG. 2 is an internal configuration diagram of the exchange and the mobile phone of FIG. 1;

FIG. 3 is a diagram showing the contents of an adjacent base station member list stored in a RAM 1a of FIG. 2;

FIG. 4 is a flowchart illustrating a processing operation during a call of the exchange 1;

FIG. 5 is a flowchart showing an operation during a call of the mobile phone 3;

FIG. 6 is a schematic configuration diagram of a wireless communication device according to a conventional example.

FIG. 7 is a flowchart showing a processing during call of a mobile phone according to a conventional example.

[Description of Signs] 1 Switch, 1a CPU, 1c RAM, 2a, 2b
Base station, 3 mobile phone, 3a CPU, 3c RA
M, 4 maintenance console, 5a, 5b service area, 6 display unit.

────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP-A-5-37456 (JP, A) JP-A-4-27223 (JP, A) JP-A-5-344055 (JP, A) 336564 (JP, A) (58) Field surveyed (Int. Cl. ⁷ , DB name) H04Q ^7/ 00-7/38 H04B ⁷ /24-7/26 102

Claims (3)

(57) [Claims] 1. A plurality of base stations connected to an exchange, and a plurality of base stations provided for each of these base stations are connected to the telephone line via the base station and the exchange for calls from a telephone line, thereby enabling external line communication. And a wireless communication device including a mobile phone capable of wireless communication by moving between service areas of each base station, wherein an alarm output means for outputting alarm information to the mobile phone, and a call disconnection other than a normal sequence. Storage means for storing the base station ID that was in use at the time;
If the base station ID in use is equal to the base station ID stored in the storage means, the alarm output means outputs alarm information indicating that the user is in a service area where a call may be disconnected. And a control unit for storing, in the storage unit, a base station ID that was being used when a call other than a normal sequence was disconnected. 2. A storage means for storing IDs of a base station and a mobile phone when a call other than a normal sequence is disconnected, and IDs of a base station and a mobile phone disconnected when a call other than a normal sequence is disconnected. 2. The wireless communication apparatus according to claim 1, further comprising control means for causing the storage means to store the information. 3. The storage means of the exchange stores the vacant channel information of the adjacent base station, and the control means of the exchange determines that the adjacent base station having the vacant channel based on the vacant channel information of the adjacent base station during a call. If the alarm information does not exist, the alarm information is transmitted to the mobile phone, and the control means of the mobile phone indicates that when the alarm information is received from the exchange, moving from the alarm output means may disconnect the call. 3. The wireless communication apparatus according to claim 2, wherein the output of the alarm information is controlled.