JPH07107550A - Mobile communication device - Google Patents

Abstract

(57) [Abstract] [Purpose] Turning on / off the power of the mobile station in consideration of the case where the user carrying the mobile station in the mobile communication device moves out of the service area and abandons the communication. O
An object of the present invention is to provide a mobile communication device in which the automatic position registration function is turned ON / OFF by performing FF and the power consumption of the mobile station is minimized. [Structure] In a mobility management unit 16, a reception electric field level measuring unit 1 for a signal from a base station in which a mobile station is currently registered.
1 and the information of the reception electric field level measuring unit 12 of the signal from each base station are used to specify whether the mobile station exists in the service area or outside the service area, and activates the out-of-range warning or the location registration request. . Also, various timer controls of the timer unit 14 are performed from the time when the user carrying the mobile station moves out of the service area until the user returns to the service area, and the power source of the power switch unit 15 of the mobile station is controlled based on the information from the timer unit 14. Take control.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mobile communication device, and more particularly, to mobile management of a mobile in mobile communication.

[0002]

2. Description of the Related Art A mobile management technique for a mobile unit in a conventional mobile communication apparatus will be described below. In a mobile communication device that configures a service area with a plurality of base stations capable of sufficiently communicating with the transmission power of the mobile station and performs wireless communication with the base station and a mobile station that allows movement within the service area, the mobile station is When moving, the received electric field level of the signal from the currently registered base station changes. In particular, when the mobile station moves from the currently registered base station zone (hereinafter referred to as its own zone) to the peripheral zone, the received electric field level deteriorates and communication becomes impossible. In order to prevent the above-mentioned situation and enable mobile communication in the service area, the mobile station identifies the zone to be transferred and registers the location of the transferred zone to the base station. Therefore, the mobile station always manages the received electric field level of the signal from the base station in its own zone, and recognizes the zone transition when the received electric field level falls below the threshold value. Next, the mobile station searches for signals from each base station in the peripheral zone and measures the received electric field level of those signals.The base station with the highest received electric field level among the base stations whose received electric field level is equal to or higher than the threshold value. The zone is determined to be the next own zone and the location registration is requested to the base station. The above is the normal procedure for location registration.However, if the received electric field level of the signal from the currently registered base station is below the threshold and the received electric field level of the signal from other base stations is also If the threshold has not been reached, the mobile station determines that it is outside the service area, and issues an out-of-range warning to the user. In that case, the mobile station manages the reception electric field level of the signal from the currently registered base station and the reception electric field level of the signal from another base station, and when it judges that the user has returned to the service area, Make a location registration request to the base station.

[0003]

The out-of-range detection of the mobile station and the relocation registration accompanying it in the conventional mobile communication device are performed by the procedure described above. Here, it is detected that the mobile station is out of range. The out-of-range warning given to the user when doing so is considered to be normal operation when the mobile station returns to the service area promptly. However, it is fully conceivable that some users may stay outside the service area within a certain period of time while carrying the mobile station and abandon communication within the certain period of time. In such cases, the mobile station of the conventional mobile communication device measures the reception electric field level of the signal from the currently registered base station and the reception electric field level of the signal from another base station, and the mobile station is within the service area. Until it returned, there was a problem in that it searched for a base station capable of location registration and wasting power of the mobile station. Therefore, an object of the present invention is, in order to solve the above problems, when the user carrying the mobile station does not return to the service area within a certain period of time, that is, the user abandons communication. In consideration of such a case, it is to provide a mobile communication device that minimizes the power consumption of the mobile station.

[0004]

In order to achieve the above object, a mobile communication apparatus of the present invention measures a reception electric field level of a signal from a base station in which the mobile station is currently registered. Means, a means for searching signals from each base station and measuring their received electric field levels, an out-of-range detection means for detecting that the mobile station is out of the service area, and a mobile station out-of-range. It is provided with a clocking means that operates while the communication is impossible and a means for periodically turning on / off the power of the mobile station using the clocking means.

[0005]

In the mobile communication device having the above-mentioned structure, the mobile station measures the received electric field level of the signal from the base station with which the mobile station is currently registered, and the signal from each base station is searched for and received. The means for measuring the electric field level and the means for detecting the out-of-service area of the mobile station specify whether the mobile station exists in the service area or out of the service area, and activates the out-of-area warning or the location registration request. next,
After the mobile station moves out of the service area, the mobile station moves out of the service area by means of the timekeeping means that operates while the mobile station is out of the service area and in the communication disabled state, and the means for periodically turning on / off the power of the mobile station using the timekeeping means. Until the mobile station returns to the service area, the mobile station's power consumption is minimized by periodically setting the service area grace time and power OFF time for automatic location registration.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described in detail below with reference to the drawings. FIG. 1 is a block diagram of a mobile station movement management unit of a mobile communication device according to the present invention, and FIG. 2 and FIG.
6 is a flowchart showing a location registration procedure of a mobile station mobility management unit in the mobile communication device of the present invention. In FIG. 1, reference numeral 11 denotes a first reception electric field level measuring unit for measuring the reception electric field level of a signal from a currently registered base station, and reference numeral 12 searches for a signal from each base station to measure the reception electric field level. The second reception electric field level measuring unit 13 which performs the operation receives the notification of the out-of-range detection performed by the movement management unit 16 based on the information of the first reception electric field level measuring unit 11 and the second reception electric field level measuring unit 12. , An out-of-range warning unit that issues an out-of-range warning to the user, and 14 various timers (return time within range, power OFF time, position registration request grace time) as timekeeping means by various start commands from the movement management unit 16 during out-of-range detection. A timer unit that is activated and notifies the mobility management unit of the expiration of the timer when the timer expires; 15 is a power switch unit that controls ON / OFF of power supplies other than the timer based on information from the mobility management unit 16; Manages information for 1,12,13,14,15, management of the reception field level of the signal from each base station, out-of-range detection, the timer control, power control, a mobility control unit that performs location registration.

Next, the location registration request procedure, which is a sub-routine step in the location registration procedure of the mobile station according to the present invention, will be described in order according to each step with reference to FIG. The mobility management unit 16 confirms the received electric field level of the signal from the currently registered base station (step 4
0), it is judged whether the value is a sufficient value for the threshold value of the received electric field level (step 41). If the movement management unit 16 determines that the value is sufficient, step 4
Proceed to step 6 and return the end status: OK. When it is determined in step 41 that the mobility management unit 16 has fallen below the threshold value of the reception electric field level, the reception electric field level measurement unit 13 of the signal from each base station is made to search for the signal from each base station. , And measure their received electric field levels (step 42).
Based on the information, the mobility management unit 16 determines whether or not there is a base station whose mobile station reception electric field level is equal to or higher than a threshold value (step 43), and identifies the base station having the highest reception electric field level among them. Then (step 44), the location is registered in the base station (step 45), and the end state: OK is returned (step 46). Next, in step 43, if no base station reaching the threshold value is detected in the received electric field level of the signal from each base station, the end state: NG is returned (step 47). As described above, in the subroutine of FIG. 3, only when the received electric field level of the signals from all the base stations in the service area does not reach the threshold value, the end state: NG is returned. The location has been registered in that base station, and the end status is OK.
return it.

Next, the location registration procedure of the mobile station according to the present invention will be described step by step with reference to FIG. The location registration request procedure was performed (step 20).
When there is a base station whose number is equal to or larger than the threshold (end state: OK), the mobility management unit 16 returns to the first step (step 1) and repeats the same procedure. When there is no base station equal to or more than the threshold value (end state: NG), the mobility management unit 16 determines that the mobile station is out of range, and the out-of-range warning unit 13
Is notified of the out-of-range detection (step 21). Upon receiving this notification, the out-of-range warning section 13 gives the user an out-of-range warning (step 22). The mobility management unit 16 that has detected the out-of-service area of the mobile station activates the timer 1 in which the timer unit 14 has set the resumption delay time of the mobile station (step 23), and executes the location registration request procedure (step 24). In this procedure, when the mobility management unit 16 detects the return of the mobile station to the area, the zone is returned to the base station or the location is registered to another base station (end state: OK). Return. On the other hand, even if the timer 1 expires (step 26)
If no return to the area is detected (end status: NG),
The mobility management unit 16 determines that the mobile station has abandoned the communication, causes the power switch unit 15 to turn off the power other than the timer (step 27), and at the same time, the timer 2 which sets the power off time of the mobile station in the timer unit 14 is set. A start instruction is given (step 28), and the notification of the expiration of timer 2 from the timer unit 14 is waited (step 29). Next, the movement management unit 16 that has received the notification of the expiration of the timer 2 causes the power switch unit 15 to turn on the power (step 30), and at the same time, issues a timer 3 start command that sets the position registration request grace time to the timer unit 14. (Step 31) Then, the location registration request procedure is executed (step 32). In this procedure, when the mobility management unit 16 detects the return of the mobile station to the area, the zone is returned to the base station or the location is registered to another base station (end state: O
K), return to step 1. On the other hand, if the return to the service area is not detected even when the timer 3 has expired (step 34) (end state: NG), the mobility management unit 16 causes the power switch unit 15 to turn off power other than the timer (step 2).
7). Thereafter, the mobile station determined to be in the communication abandonment repeats the procedure of steps 27 to 34 until it detects the return to the service area.

[0009]

Since the present invention is configured as described above, it has the following effects. That is, until the mobile station that has moved out of the range is detected to return to the range,
In-range return grace time and power supply O for registering own position in mobile station
By periodically providing the FF time, it becomes possible to minimize the power consumption of the mobile station.

[Brief description of drawings]

FIG. 1 is a block diagram of a mobile station movement management unit of a mobile communication device according to the present invention.

FIG. 2 is a flowchart of a procedure for performing location registration of a mobile station of a mobile communication device according to the present invention.

FIG. 3 is a flowchart showing a location registration request procedure which is a subroutine step in the procedure (FIG. 2) of performing location registration of a mobile station of the mobile communication device according to the present invention.

[Explanation of symbols]

 11 First Received Electric Field Level Measuring Unit 12 Second Received Electric Field Level Measuring Unit 13 Out-of-service Warning Unit 14 Timer Unit 15 Power Switch Unit 16 Mobility Management Unit

Claims (1)

[Claims] 1. A wireless communication between a base station and a mobile station that permits movement within the service area, wherein a service area is composed of a plurality of base stations capable of sufficiently communicating with the transmission power of the mobile station (portable terminal). In a mobile communication device that performs mobility management by registering the location of the mobile station in one of the base stations or in a plurality of base stations, a base in which the mobile station is currently registered in the mobile station The means for measuring the received electric field level of the signal from the station, the means for searching the signal from each base station and measuring the received electric field level, and the fact that the mobile station exists outside the service area By providing a means for detecting, a clocking means that operates while the mobile station is out of range and in a communication-disabled state, and a means for periodically turning on / off the power of the mobile station using the clocking means, Communication outside the service area An apparatus characterized by controlling the power supply of a mobile station in an impossible state.