JP4336826B2 - Folding mobile phone base station search system and method - Google Patents

Description

  The present invention relates to a base station search system for a folding mobile phone that searches for a base station. In particular, the present invention relates to a base station search system for a folding mobile phone that can return to a standby state sooner than when the radio wave condition is improved again because it is determined that the mobile phone is out of service.

  In conventional folding mobile phone devices, the control unit detects that it is located within the service area in order to prevent wasting battery power even when the radio wave environment is unstable. In order to determine that the mobile phone is located within the service area from the out-of-service state, it is difficult to determine that the mobile phone is located within the service area by increasing the threshold value of the received electric field level that is an indicator of the communication environment. In an unstable situation, processing such as location registration is not performed easily. In addition, when waiting for an incoming call, the control unit also determines that it has been located within the service area from the out-of-service state even when the simultaneous call channel cannot be received continuously and stable call reception is not possible. However, the threshold value is raised to make it difficult to determine that the mobile phone is located within a range, so that processing such as location registration is not easily performed in a situation where the communication environment is unstable (for example, Patent Documents). 1).

  In addition, the conventional folding mobile phone device can be notified of one or a combination or all of vibration, flashing light, intermittent sound, and screen display in a state where the device is folded and out of the service area or within the service area. In order to improve performance, a button switch is provided along with a configuration from the antenna Ant to the scan circuit. Furthermore, it has a configuration from a liquid crystal display matrix driving unit to a timer circuit. And it is the structure which folds an apparatus in two. The display unit and the operation unit are arranged on the inner facing surface in the folded state. One or a combination of vibration, light flashing, intermittent sound, and screen display outside the service area or within the service area by pressing a button switch that can be operated externally in a folded state after judging the service area or service area from the reception status Alternatively, the notification is made in all (for example, see Patent Document 2).

  In addition, in the conventional digital radio telephone, in order to reduce the area that cannot be selected and to select the optimum radio base station, the zone outflow determination comparator compares the reception level of the control signal transmitted from the radio base station. When it is smaller than the standby level threshold set in the standby level threshold register, it is detected that the telephone has left the wireless zone. Then, the base station selection comparison unit uses a base station selection level threshold value closest to the reception level and smaller than the reception level as a reference for selecting a radio base station instead of the base station selection level threshold value (for example, (See Patent Document 3).

JP2003-18653 JP-A-11-205857 JP 08-294174

By the way, in contrast to the above-described prior art, in a folding mobile phone, it is always desired to extend the usable time for standby, telephone calls, etc., so that current consumption can be reduced even when the folding mobile phone is out of the radio base station range. As described above, a search method for a radio base station is being studied.
As an example of examination, in the conventional wireless base station search method when out of service area, the folding mobile phone uses the standby electric field threshold value to determine whether it is within the service area or out of service area, and searches for the radio base station at a certain period when it is out of service area. There is something to do.

Some folding mobile phones search for a radio base station at a longer period when out-of-service is detected continuously for a certain period of time.
By controlling in this way, it is possible to reduce the current consumption of the folded mobile phone even when out of service.
However, since the standby electric field threshold is often set to a high electric field value that allows reliable communication between the radio base station and the folding mobile phone in places where there are many radio base stations such as urban areas, When a folded mobile phone is not used and it is folded and placed in a pocket or bag of clothes, the received electric field value may temporarily fall below the standby electric field threshold.

Even if the radio wave condition is improved again after being determined to be out of range under such circumstances, if it is folded and placed in a pocket or bag of clothing, If the received electric field value is smaller than the standby electric field threshold value and the received electric field value does not become stronger by the amount of radio wave shielding of clothes and bags, there is a problem that the standby state cannot be established during that time.
Therefore, in view of the above problems, the present invention is a folding cellular phone that can be returned to the standby state earlier than the case where the folding cellular phone is determined to be out of service in the unused state, that is, folded, and the radio wave condition is improved again after the determination. It is an object of the present invention to provide a base station search system and method.

  In order to solve the above problem, the present invention provides a base station search system for a folding mobile phone that searches for a base station, and compares the received electric field value with a first standby electric field threshold value to determine whether the received electric field is When it is smaller than the standby electric field threshold value of 1, it is determined that the folded mobile phone is out of the service area, and the out-of-service determination unit for removing the standby state by searching for the base station is determined as out of service by the out-of-service determination unit. Immediately after that, when the folded state is detected by the open / close detection unit that detects a folded state and an unfolded state of the folded mobile phone, the first standby electric field threshold value is set in the out-of-service determination unit. And a standby reception field value setting unit that changes to a second standby field threshold value that is smaller than the one standby field threshold value. Providing machine base station search system.

Further, when the second standby electric field threshold value is changed and set in the out-of-service determination unit by the standby reception electric field value setting unit, the received electric field value is compared with the second standby electric field threshold value. , if larger heard than the reception electric field value is the second standby electric field threshold, the folding cellular phone shifts to standby operation from out of service operation.
Furthermore, the first said by received electric field value setting section capable standby after changing settings in the first standby small second waiting field threshold than the electric field threshold, and one Dan設 constant change after a predetermined time has elapsed The standby electric field threshold value of 2 is returned to the first standby electric field threshold value.

Further, in the standby reception electric field value setting unit, after the change to the second standby electric field threshold value is set, if a developed state is detected by the open / close detection unit, the second standby electric field value is set. The threshold value is returned to the setting of the first standby electric field threshold value.
Furthermore, the present invention provides a base station search method for a folding mobile phone that searches for a base station, wherein the received electric field value is compared with the first standby electric field threshold value to compare the received electric field value with the first standby electric field threshold value. When it is smaller than the value, it is determined that the folded mobile phone is out of range and the standby state is removed by searching for a base station, and the folded state and unfolded state of the folded mobile phone are detected immediately after it is determined that it is out of range. And a step of changing the first standby electric field threshold value to a second standby electric field threshold value smaller than the first standby electric field threshold value when the folded state is detected. A base station search method for a folding mobile phone is provided.

  As described above, according to the present invention, since the means for detecting the open / closed state of the folded mobile phone is provided and the use state of the folded mobile phone is grasped, the folding mobile phone is folded immediately after it is determined that it is out of range. By detecting the open / close state of the mobile phone, the standby electric field threshold value can be changed in a smaller direction.

  Furthermore, when the received electric field value is larger than the standby electric field threshold value changed in a smaller direction, the standby electric field value is temporarily below the standby electric field threshold value by transitioning to the standby state even though there are many radio base stations. When the reception electric field value is set, the standby electric field threshold value is set to a standby electric field threshold value smaller than the normal standby electric field threshold value, so that it is possible to return to the standby state more quickly.

  Further, when the folded state is changed to the unfolded state, there is no radio wave shielding such as clothes and bags in the folded state, so that the second standby electric field threshold value is returned to the first standby electric field threshold value.

FIG. 1 is a diagram showing a schematic configuration of a base station search system for a folding cellular phone according to the present invention. The radio base station 200 shown in the figure is connected to a public line (not shown).
Within the connectable range 201, the folding mobile phone 100 and the radio base station 200 are connected via a time-division multiplex radio transmission path so that voice and control data can be transmitted and received. The value is higher than the standby electric field threshold value.

Outside the connectable range 201 and within the non-connectable range 202, the received electric field value of the folded mobile phone 100a is smaller than the standby electric field threshold value, so it is determined that the mobile phone 100a is out of the service area, and transmission / reception between the folded mobile phone 100a and the radio base station 200 is performed. I can't.
It is determined that there is no reception electric field in the folded cellular phone 100b located outside the non-connectable range 202.

  FIG. 2 is a block diagram showing a schematic configuration of the folding cellular phone in FIG. As shown in the figure, a folding mobile phone 100 capable of transmitting and receiving with a plurality of radio base stations 200 connected to a public line via a time division multiplex radio transmission path is provided with a radio unit 101. It has a function of receiving a signal transmitted from a radio base station via an antenna and detecting a received electric field value.

A baseband unit 102 is connected to the wireless unit 101, and the baseband unit 102 has a function of inputting / outputting encoded data to / from the wireless unit 101.
The baseband unit 102 is connected to a transmission / reception unit 103, and the transmission / reception unit 103 has a function of inputting / outputting audio data to / from the baseband unit 102.
Further, the folding cellular phone 100 is provided with operation keys 105. The operation keys 105 have ten keys and function keys, and have a function of inputting information.

Further, the folding mobile phone 100 is provided with an LCD (liquid crystal) display unit 106, and the LCD display unit 106 has a function of displaying information.
Further, the folding mobile phone 100 is provided with a storage unit 107, and the storage unit 107 stores programs and data for operating the folding mobile phone 100, and standby electric field values (standby electric field threshold values) VTH2 and VTH1, which will be described later. It has the function to do. Here, VTH2 <VTH1 is satisfied, and VTH2 is made smaller than VTH1 by an amount equivalent to radio wave shielding such as clothes and bags. This is because VTH2 is set appropriately.

Further, the folding mobile phone 100 is provided with a timer 108, and the timer 108 measures a timeout T1 described later.
Further, the folding mobile phone 100 is provided with a control unit 104. The wireless unit 101 and the control unit 104 include the baseband unit 102, the operation keys 105, the LCD display unit 106, the storage unit 107, and the timer 108. And an out-of-service determination unit 104A, an open / close detection unit 104B, and a standby reception field value setting unit 104C.

The out-of-service determining unit 104A compares the received electric field value notified from the wireless unit 101 with the standby received electric field value (standby electric field threshold value) VTH1 or VTH2, and determines whether the folded mobile phone 100 is within or out of range. It has a function to perform. In the case of out-of-service determination, the standby state is removed by searching for a base station.
The open / close detection unit 104B is in the folded state or in the unfolded state immediately after the out-of-range determination unit 104A in which the standby reception electric field value (standby electric field threshold value) VTH1 is set is determined to be out of range. It has a function to detect.

  The reception electric field value setting unit 104C that can stand by receives the received electric field value (standby electric field threshold value) VTH1 or VTH2 that can be read out from the storage unit 107 in the out-of-service determination unit 104A according to the state detected by the open / close detection unit 104B. Has the function to set.

  FIG. 3 is a diagram for explaining an example of the setting operation of the standby reception electric field value setting unit 104C in FIG. As shown in FIG. 6A, the out-of-range determination unit 104A determines that the received electric field value is smaller than the reception electric field value (standby electric field threshold value) VTH1 that can be awaited, and determines that the out-of-range is out of range. When mobile phone 100 is in the unfolded state, standby reception field value setting unit 104C maintains the standby reception field value (standby field threshold) VTH1.

  As shown in FIG. 5B, the out-of-range determination unit 104A determines that the received electric field value is smaller than the reception electric field value (standby electric field threshold value) VTH1 that can be awaited, and determines that the out-of-range is out of range. When the cellular phone 100 is in the folded state, the standby reception field value setting unit 104C sets the standby reception field value (standby field threshold) VTH2 for a predetermined time T1.

FIG. 4 is a flowchart for explaining an operation example of the base station search system for the folding cellular phone in FIG.
In step S11, the out-of-service determining unit 104A of the control unit 104 compares the detected received electric field with the standby received electric field value (standby electric field threshold value) VTH1, and if the detected received electric field is smaller than VTH1, It is determined from the standby state of the radio base station 200 that the folded mobile phone 100 is out of service for some reason.
In step S12, the open / close detection unit 104B detects whether the folded mobile phone 100 is in the folded state or the unfolded state. In the expanded state, the process proceeds to step S18. If the expanded state is established after VTH2 is set in the folded state, the setting of VTH2 is released and the setting returns to the setting of VTH1. This is due to the absence of radio wave shielding such as folded clothes and bags.

In step S13, when the folded mobile phone 100 is in the folded state, the timer 108 is started.
In step S14, the reception electric field value setting unit 104C that can stand by can receive a reception electric field value (standby electric field threshold value) that is smaller than the reception electric field value (standby electric field threshold value) VTH1 that can be waited for the out-of-range determination unit 104A. VTH2 is read from the storage unit 107 and set.

  With this setting, immediately after it is determined that the folded mobile phone is out of range, the reception electric field value (standby electric field threshold value) that can be waited for by detecting the open / closed state of the folded mobile phone can be changed to the smaller direction VTH2.

In step S15, after setting the standby reception electric field value (standby electric field threshold value) VTH2, the radio base station 200 is searched.
In step S16, the received electric field value as a search result is acquired from the wireless unit 101, and the out-of-service determining unit 104A compares the received electric field value with the standby received electric field value (standby electric field threshold value) VTH2.

In step S17, determines that the out of service in service area determination unit 104A if either the reception electric field value is waiting a receiving electric field value (standby electric field threshold) VTH 2 by remote small or equal to, the timer 108 is a fixed time T1 Check if it has elapsed and timed out. If not timed out, the reception electric field value (standby electric field threshold value) VTH2 is maintained, and the process returns to step S15 to search for the radio base station 200.

  If the timer 108 has timed out in step S18, the standby reception field value setting unit 104C sets the standby reception field value (standby field threshold) from VTH2 to VTH1, and the process ends.

In step S19, considers when the received electric field value (standby electric field threshold) VTH 2 O Rimodai heard receivable field value waiting is area of the wireless base station 200, the process proceeds to standby operation, processing Exit.
This transition, if you were to environment such that temporarily waiting receives possible reception electric field value (standby electric field threshold) following the reception electric field value despite the radio base station 200 there are many, waiting Since the possible reception electric field value (standby electric field threshold value) is set to a reception electric field value (standby electric field threshold value) that can be waited for smaller than the normal reception electric field value (standby electric field threshold value), standby can be performed earlier. It becomes possible to return to the state.

It is a figure which shows schematic structure of the base station search system of the folding portable telephone of this invention. FIG. 2 is a block diagram illustrating a schematic configuration of the folding mobile phone in FIG. 1. It is a figure explaining the example of a setting operation | movement of the reception electric field value setting part 104C which can wait in FIG. 3 is a flowchart for explaining an operation example of the base station search system for a folding mobile phone in FIG. 1.

Explanation of symbols

100, 100a, 100b ... Folding mobile phone 101 ... Radio unit 102 ... Baseband unit 103 ... Transmitter / receiver unit 104 ... Control unit 104A ... Out-of-range determination unit 104B ... Opening / closing detection unit 104C ... Standby reception field value setting unit 104D ... Search Period setting section 105 ... operation key 106 ... LCD display section 107 ... storage section 108 ... timer 200 ... wireless base station 201 ... connectable range 202 ... non-connectable range

Claims (5)

In a base station search system for a folding mobile phone that searches for a base station,
When the received electric field value is compared with the first standby electric field threshold value and the received electric field is smaller than the first standby electric field threshold value, it is determined that the folded mobile phone is out of range and the base station Out-of-range determination unit for removing the standby state in the search,
An open / close detection unit that detects the folded state and the unfolded state of the folded mobile phone immediately after it is determined that the out-of-range determination unit is out of range,
When the folded state is detected by the open / close detection unit, the out-of-service determination unit changes the first standby electric field threshold value to a second standby electric field threshold value smaller than the first standby electric field threshold value. A base station search system for a folding cellular phone, comprising: a standby reception electric field value setting unit to be set. When the second standby electric field threshold value is changed and set in the out-of-service determining unit by the standby reception electric field value setting unit, the received electric field value is compared with the second standby electric field threshold value. If larger heard than the electric field value is the second standby electric field threshold, the folding mobile phone, characterized in that transition to the standby operation of out-of-range operation, the base of the mobile phone folded according to claim 1 Station search system. After the in received electric field value setting unit capable standby changed set to the smaller than the first standby electric field threshold second waiting field threshold, the second was one Dan設 constant change after a predetermined time has elapsed The base station search system for a folding mobile phone according to claim 1, wherein a standby electric field threshold value is returned to the first standby electric field threshold value. In the standby reception electric field value setting unit, after the change to the second standby electric field threshold value is set, if the open / close detection unit detects a developed state, the second standby electric field threshold value is set. The base station search system for a folding mobile phone according to claim 1, wherein the first standby electric field threshold value is returned to the setting of the first standby electric field threshold value. In a base station search method for a folding mobile phone that searches for a base station,
When the received electric field value is compared with the first standby electric field threshold value and the received electric field is smaller than the first standby electric field threshold value, it is determined that the folded mobile phone is out of range and the base station The process of removing the standby state by search,
A step of detecting the folded state and the unfolded state of the folded mobile phone immediately after it is determined that it is out of service;
Changing the first standby electric field threshold value to a second standby electric field threshold value that is smaller than the first standby electric field threshold value when the folded state is detected, To search for a base station of a folding mobile phone.

Images