JP2966371B2 - Mobile station standby control method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a standby control system for a mobile station, and more particularly to a standby control system for a mobile station that performs reliable and quick standby control.

[0002]

2. Description of the Related Art In a digital mobile telephone system,
The mobile phone receives radio waves from the base station and performs a predetermined operation based on the received information, but the zones covered by the base stations distributed and arranged in various places partially overlap,
When the mobile telephone is located in an overlapping area of a plurality of zones, zone transfer and channel selection control for realizing communication with the most appropriate base station are performed.

In this type of mobile station standby control system, it is necessary to select the maximum reception level of the frequency received at the mobile station and start the standby operation in order to enable transmission and reception operations. This operation is premised on the conditions defined in RCR-STD27 of the Association of Radio Industries and Businesses and that the mobile device is permitted to use the frequency (area). Then, the channel that does not satisfy the condition is held to that effect, and is excluded from the selection candidates thereafter, thereby speeding up the deletion of the unnecessary operation and the transition to the standby operation. One example of a conventional mobile station standby control method is
It is disclosed in JP-A-9-65412.

[0004]

As described above, in the conventional mobile station standby control method, a channel that does not satisfy the condition is held to that effect, and is excluded from the selection candidates thereafter.
Although unnecessary operations can be deleted and a high-speed transition to a standby operation can be performed, a great problem arises if information for excluding from the selection candidates is kept forever. This is because if the mobile device moves to a completely different area, the above conditions may be satisfied and the mobile device may be able to stand by.

[0005] For example, referring to FIG. 2, if it is assumed that the channel of the frequency B is “standby impossible”, the radio wave state changes during the standby at the frequency A, and the reception level of the frequency B becomes lower than the reception level of the frequency A. Is higher, the mobile station tries to switch to the B channel because the level of the frequency B is higher, but since the B channel cannot be on standby,
Eventually, the standby in the A channel is continued, and the channel B is set to “not ready”.
If the "standby disabled" information is "transition of standby operation", this operation is repeated forever, and sending and receiving cannot be performed.

SUMMARY OF THE INVENTION An object of the present invention is to provide a mobile station standby control system which solves the conventional problem and enables standby transition to be performed reliably and quickly.

[0007]

In order to solve the above-mentioned problem, a base station detected by a perch scan is activated, and it is determined whether or not it is possible to stand by based on information received from the base station. If the mobile station can stand by, the base station selects the channel of the base station as a perch channel and performs a standby operation. The mobile station standby control method according to the present invention determines whether or not standby is possible based on information received from the base station. As a result, if it is determined that the base station cannot be on standby, the base station is held as channel error information in order to exclude this base station from the next activation selection candidate. When the reception level of the base station that is performing the standby operation by selecting the perch channel becomes lower than the reception level of the neighboring base station and there is no incoming or outgoing call when the standby operation cannot be performed at this nearby base station Then, it is determined whether or not the activation of the TCH has been executed. If the activation has been executed, the content held as the channel error information is cleared.

Further, the base station detected by the perch scan is activated, and it is determined whether or not the base station can stand by based on information received from the base station. The standby control method of a mobile device according to the present invention, which performs a standby operation by selecting a channel, determines whether or not standby is possible based on information received from a base station. This base station is retained as channel error information in order to exclude the base station from the next activation selection candidate. A state in which the reception level of the base station that is performing the standby operation by selecting the perch channel becomes lower than the reception level of the neighboring base station and the TCH cannot be activated, or a base that performs the standby operation by selecting the perch channel When there is no station, out-of-service scan is performed at predetermined intervals. Then, when the out-of-coverage scan continues for a predetermined time or more, the content held as the channel error information is cleared.

Further, the base station detected by the perch scan is activated, and it is determined whether or not it is possible to stand by based on information received from the base station. A standby control method for a mobile station that performs a standby operation by selecting a channel as a channel determines whether or not standby is possible based on information received from the base station. Is retained as channel error information in order to exclude from the next activation selection candidate. In a state where the reception level of the base station that is performing the standby operation by selecting the perch channel is lower than the reception level of the peripheral base station and the TCH cannot be activated, the standby operation is performed by selecting the perch channel. When there is no base station, out-of-service scanning is performed at predetermined intervals. When the out-of-service scan has been performed a predetermined number of times or more, the content held as the channel error information is cleared.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, an embodiment of a mobile station standby control system according to the present invention will be described with reference to the drawings. FIG. 1 is a flowchart showing an operation processing procedure of a preferred embodiment of a mobile station standby control system according to the present invention.

In FIG. 1, first, a plurality of perch channels are paired based on information held in the mobile device .
Then, a perch scan (channel scan) operation is executed (S1), and activation is determined (S2). In other words, the channel with the highest level is activated by the perch scan, and if the information as the “standby impossible” channel is already held, the activation with the channel with the next highest reception level is determined. Here, when it is determined to be activated (when it is determined that there is no problem at this time), channel activation is performed (step S3), and it is determined whether or not standby is possible (step S4). If there is, a standby operation is performed (step S5). In addition,
The base station that has performed the standby operation in step S5
Become a station.

[0012] Then, own station reception level is determined whether higher than the peripheral station reception level (step S6), and sometimes the own station receiving level is lower than the peripheral station reception level, around
It is determined whether or not standby at the station is possible (step S
7) If not possible, it is determined whether there is an outgoing / incoming call (step S8). Here, in step S6, even when the own station reception level is higher than the peripheral station reception level, the processing shifts to the processing in step S8. If it is determined in step S8 that there is no outgoing / incoming call, the process returns to step S6. If it is determined that there is an outgoing / incoming call, TCH activation (a state in which the mobile station has set the information channel (TCH)) is executed. Is determined (step S9), and if activated, the channel error information is cleared (step S1).
0) A call state is reached (step S11). Step S9
, When TCH activation is not performed, TC
It is determined whether or not H activation is impossible (step S12), and if not, there is no base station where the mobile station becomes a perch.
It is determined that you are out of the maritime area or in a weak electric field area where you cannot wait.
Out-of-service scan that performs a perch scan at predetermined intervals
Then, the process proceeds to step S15 described below. If the TCH cannot be activated, the process returns to step S9.

If it is determined in step S2 that the channel has not been activated, it is determined whether there is a channel (step S2).
14) If it is determined that there is no channel, it is determined whether the number of out-of-service scans has reached a predetermined number N (step S15). If it is determined that there is a channel, the process returns to step S3. Note that the determination in step S15
Indicates that the out-of-service scans are
A determination may be made as to whether or not the operation has continued for a predetermined time or more.

On the other hand, in step S4, this base station
If it is determined that the standby in step (1) is not possible, the channel error information is retained to exclude the candidate from the next activation selection candidate (step S13), and then the process proceeds to step S14. If the number of out-of-service scans has reached N in step S15, the channel error information is cleared (step S16), and the process returns to step S1.

[0015]

As described above, according to the mobile station standby control method of the present invention, after holding the channel number determined to be invalid as the standby channel, the mobile station waits for the execution of the TCH activation, for a certain time, and for a certain number of times. When the out-of-service transition continues, the held information is cleared, so that the standby transition can be performed reliably and promptly.

[Brief description of the drawings]

FIG. 1 is a flowchart showing an operation process in a mobile station standby control system according to an embodiment of the present invention.

FIG. 2 is a diagram for explaining a problem of a conventional mobile station standby control method.

[Explanation of symbols]

 S1 to S16 processing steps

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁶ , DB name) H04B 7/26-6/26 113 H04Q 7/04-7/38

Claims (3)

(57) [Claims] 1. A base station detected by a perch scan is activated, and it is determined whether or not standby is possible based on information received from the base station. If standby is possible, the channel of the base station is perch. In the standby control method of a mobile station performing a standby operation by selecting a channel, a determination is made as to whether or not standby is possible based on information received from the base station. Holding the station as channel error information to remove it from the next activation selection candidate, the reception level of the base station performing the standby operation by selecting the perch channel becomes lower than the reception level of the surrounding base station, If there is any incoming or outgoing call when the standby operation cannot be performed in the surrounding base station, it is determined whether or not the TCH is activated. And a mobile station standby control method for clearing the content held as the channel error information if executed. 2. A base station detected by the perch scan is activated, and it is determined whether or not standby is possible based on information received from the base station. In the standby control method of a mobile station performing a standby operation by selecting a channel, a determination is made as to whether or not standby is possible based on information received from the base station. The station is retained as channel error information in order to remove the station from the next activation selection candidate, and the reception level of the base station that is performing the standby operation by selecting the perch channel becomes lower than the reception level of the neighboring base station and TCH Cannot be started, or there is no base station that performs standby operation by selecting it as the perch channel. , Running out of range scans at predetermined intervals, when the out-of-range scan is continued a predetermined time or more, standby control system of the mobile unit, characterized in that to clear the contents held as the channel error information. 3. A base station detected by the perch scan is activated, and it is determined whether or not standby is possible based on information received from the base station. If standby is possible, the channel of the base station is determined to be a perch. In the standby control method of a mobile station performing a standby operation by selecting a channel, a determination is made as to whether or not standby is possible based on information received from the base station. The station is retained as channel error information in order to remove the station from the next activation selection candidate, and the reception level of the base station that is performing the standby operation by selecting the perch channel becomes lower than the reception level of the neighboring base station and TCH Cannot be started, or there is no base station that performs standby operation by selecting it as the perch channel. , Running out of range scans at predetermined intervals, when the out-of-range scan is performed over a predetermined number of times, standby control system of the mobile unit, characterized in that to clear the contents held as the channel error information.