JPH0522218A - Wireless telephone - Google Patents

Abstract

(57) [Abstract] [Purpose] To reduce call loss when making a call from a wireless telephone device. [Configuration] The wireless telephone 16 has registered its position with the wireless base station 13 in the wireless zone 17, and when it is possible to make or receive a call,
When the wireless telephone 16 moves to the wireless zone 19, the wireless base station 15 having the strongest received electric field is selected from the notification signals from the wireless base stations that can be received, and the calling signal is transmitted through the selected wireless base station 15. The call response is returned and the call is established. It should be noted that the first call is made to the location-registered base station 13, and if this fails, it is made to the base station 15 to confirm that the own device 16 is not in the wireless zone 17. If the wireless zone 17 is not left, it is possible to prevent erroneous location registration update.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a radiotelephone device that requires position registration in a destination wireless zone when the wireless zone is moved.

[0002]

2. Description of the Related Art Conventionally, this type of wireless telephone device has a function of either manual location registration or automatic location registration, or both of them. Bureau) is used. Therefore, the transmission signal of the wireless telephone is notified to the main device that manages the position of the wireless telephone via the wireless base station whose position has been registered, and the call is established.

FIG. 3 shows the configuration of a conventional wireless telephone device. In FIG. 3, 21 is a public communication network, 22 is a main device of a wireless telephone device, and 231 to 234 are wireless base stations. Reference numeral 241 is a wireless telephone having a transmitter / receiver for control and communication, and 251 to 254 are wireless base stations 23.
It is a wireless zone in which communication is set to 1 to 234.

Next, the operation of the above conventional example will be described. Now, assuming that the wireless telephone 241 located in the wireless zone 251 moves to the wireless zone 254, the base station 234 in the wireless zone 254 emits a notification signal including a position information signal and a transmission control channel information signal. Therefore, the wireless telephone 241 can receive this, and thus can recognize that the position of the wireless telephone 241 has moved from the wireless zone 251 to the wireless zone 254. Then, by pressing the position registration button of the wireless telephone 241, a position registration signal can be sent to the base station 234 manually or automatically to perform position registration in the wireless zone 254.

As described above, even when the conventional radiotelephone device moves in the radio zone, the incoming call can be connected by performing the location registration with respect to the radio base station of the movement destination.

[0006]

However, in the above-described conventional radiotelephone device, when the automatic location registration is performed with respect to the movement-destination radio base station, the moved radiotelephone is provided with a countermeasure against a collision of control channel uplinks. In order to reduce the traffic of the upstream signal, it was a mechanism that could not register the location until the timing of the permitted location registration of its own. Therefore, if a call origination operation is performed before automatic location registration is performed, the moved wireless telephone will issue a call origination signal to the location-registered wireless base station before movement, and the signal will be transmitted before the movement. In many cases, the call failed because it did not reach the zone.

The present invention solves such a conventional problem, and an object of the present invention is to provide an excellent radiotelephone device capable of reducing a call loss at the time of making a call.

[0008]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention, when a wireless telephone moves from a location registration zone to another zone, finds the nearest wireless base station that has not been subjected to location registration. It is designed to be used and outgoing retries.

The present invention also transmits a call when moving from a location registration zone to another zone to a base station whose location has already been registered. The base station having the strongest received electric field is selected and the transmission is retried.

According to the present invention, when the main device receives a transmission signal of a wireless telephone from a wireless zone in which the location is not registered, the main unit registers the location of the wireless zone with respect to the wireless telephone, and the main unit is directed to the wireless telephone. When an incoming call arrives, the wireless base station in the wireless zone is made to perform the incoming call processing.

[0011]

Therefore, the present invention has the following effects. A wireless telephone set that has moved to a wireless zone receives the respective broadcast signals from several wireless base stations for a certain period of time, for example, 1 minute, selects and stores the wireless base station with the strongest received electric field, and then first locates the location. When a call is made to a registered radio base station and the call fails, a call retry is made to the selected radio base station, so that the call loss at the time of the call can be reduced.

If no broadcast signal other than the position-registered wireless base station is received within the fixed period, the transmission is retried to the already-registered wireless base station. In this case, for example, the same radio base station may be used.

[0013]

DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is a schematic diagram for explaining the outline of one embodiment of the present invention. In FIG. 1, 11 is a public communication network, 12 is a main unit of a wireless telephone device, and 13 and 1
Reference numerals 4 and 15 are wireless base stations. Reference numeral 16 is a wireless telephone having a transmitter / receiver for control and communication, and 17, 18, 19 are communicable wireless zones set in the wireless base stations 13, 14, 15, respectively.

Next, the operation of the above embodiment will be described.
The position of the wireless telephone 16 is registered with the wireless base station 13 in the wireless zone 17. When the radiotelephone 16 moves to the radio zone 19 when it is possible to make and receive a call, the radio base station 15 having the strongest received electric field is selected from the notification signals from the radio base stations that can be received, and the calling signal is transmitted through the radio base station 15. Then,
The wireless base station 15 returns a call response and establishes the call.
Note that the first transmission is based on the location-registered base station 13
By sending to the base station 15 when this is unsuccessful, it is possible to confirm that the own device 16 is not in the wireless zone 17, and if it is not out of the wireless zone 15, an incorrect location registration is made. Updates can be prevented.

Next, the flow of control signals in the above embodiment will be described with reference to FIG. In FIG. 2, 11 is a public communication network, 12 is a main unit, 13, 14, 15 are wireless base stations,
Reference numeral 16 is a wireless telephone. Further, SG1 is a signal of a notification instruction from the main device 12 to the wireless base station 14,
Reference numeral 2 is a signal for instructing the radio base station 15,
G3 is a notification signal from the wireless base station 14 to the wireless telephone 16, and SG4 is from the wireless base station 15 to the wireless telephone 1.
6 is a notification signal for 6.

Now, the wireless telephone 16 is instructed by the notification signal SG3,
When SG4 is received, the electric field levels of the respective signals are compared, and for example, the reception level of SG3 is 2 (for example, 20 dB.
When the SG4 reception level is 3 (for example, an electric field of 30 dB μV or more), the wireless telephone 16
Stores the identification signal of the wireless base station 15 of the notification signal SG4, that is, the wireless zone 19 of FIG.

Next, when the radio telephone 16 makes a call using the call control channel notified from the radio base station 15,
Initially, the call signal S is sent to the wireless base station 13 whose position has been registered.
Send G5. On the other hand, since the signal does not reach the wireless zone 17 in which the wireless base station 13 is located, the wireless base station 13 does not respond. Further, the wireless base stations 14 and 15 do not receive the signal because it is not an outgoing signal to itself. Therefore, the wireless telephone set 16 makes a transmission retry to the wireless base station 15 based on the stored notification signal SG4 from the wireless base station 15, and sends out a calling signal SG6. The wireless base station 15 accepts this because it is an outgoing signal to itself, sends a calling notification SG8 to the main device 12, and sends a calling response SG7 to the calling signal SG6.
Is returned to the wireless telephone 16. After that, a calling procedure such as switching to a call channel is performed.

Upon receiving the call notification SG8, the main unit 12 checks whether or not the wireless base station 15 is a wireless base station whose position has been registered for the wireless telephone 16, and if not registered, registers it. To control the memory. As a result, when the main device 12 receives a call, the wireless base station 15 can be called as the latest wireless base station of the wireless telephone 16 whose position has been registered.

As described above, according to the above-described embodiment, when the wireless telephone 16 moves in the wireless zone, the destination wireless zone first makes a call to the location-registered wireless base station 13, and this fails. Since the transmission retry is sometimes performed to the wireless base station 15 of the moving destination, the call loss at the time of transmission can be reduced.

Further, according to the above-described embodiment, the position registration can be automatically performed with respect to the wireless base station of the moving destination without pressing the position registration button provided on the wireless telephone.

[0021]

As is apparent from the above embodiment, the present invention uses the nearest wireless base station which has not been registered when the wireless telephone moves from the location registration zone to another zone. Since the call retry function is provided, the connection establishment by the call retry is improved in comparison with the conventional call loss at the time of call origination, so that the call loss at the time of call origination can be reduced.

According to the present invention, when a call is moved from the location registration zone to another zone, the call is initially sent to the base station whose location has already been registered. Since it has a function to select the base station with the strongest received electric field from and to retry transmission, you can confirm that your own machine is not in the wireless zone before moving,
If the user is not out of the wireless zone before moving, it is possible to prevent incorrect updating of location registration.

In the present invention, when the main unit receives a transmission signal of a wireless telephone from a wireless zone in which the location is not registered, it has a function of registering the location of the wireless zone in the wireless telephone. When an incoming call arrives at a wireless telephone, the wireless base station in that wireless zone is made to perform the incoming call processing, so that it is possible to reduce the call loss when an incoming call arrives at the wireless telephone. There is an effect that the position registration at the destination can be automatically performed without pressing the position registration button.

[Brief description of drawings]

FIG. 1 is a schematic diagram showing an outline of a wireless telephone device according to an embodiment of the present invention.

FIG. 2 is a sequence diagram showing the flow of control signals in an embodiment of the present invention.

FIG. 3 is a schematic diagram showing an outline of a conventional wireless telephone device.

[Explanation of symbols]

11 public communication network 12 Main device 13, 14, 15 Wireless base stations 16 wireless telephone 17, 18, 19 wireless zones

Claims (3)

[Claims] 1. A wireless telephone having a transmitter / receiver for control and a telephone, a wireless base station provided in each of a plurality of wireless zones, and a main device for managing the position of the wireless telephone and control of incoming and outgoing calls. A radiotelephone device having a function of, when the radiotelephone moves from a location registration zone to another zone, using the nearest radio base station that has not been location-registered to retry transmission. 2. When a mobile station moves from a location registration zone to another zone, transmission is first performed to a base station whose location has already been registered, and when transmission is unsuccessful, a reception electric field is selected from among broadcast signals received after the movement. 2. The radiotelephone device according to claim 1, wherein the base station having the highest communication is selected and transmission is retried. 3. When the main device receives a transmission signal of a wireless telephone from a wireless zone whose location is not registered, the main device has a function of registering the location of the wireless zone with respect to the wireless telephone. 3. The wireless telephone device according to claim 1, wherein when an incoming call arrives, the wireless base station in the wireless zone is made to perform the incoming call processing.