JP2000261364A - Mobile object communication system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make consumption power to be low and to improve an incoming response at the time of queuing reception by providing an intermittent reception interval control means which arbitrarily changes the intermittent reception interval of a mobile station. SOLUTION: Since a group to which a mobile station belongs in a simultaneous call channel is instructed to the mobile station whose position registration is completed from a base station, the group to which the mobile station belongs is intermittently received at a basic period. When a call or an incoming call does not exist for not less than prescribed time in arbitrarily decided time in the state of intermittent reception (A), an intermittent reception interval (n) which is set, by an intermittent, reception interval setting part 4d is substituted for an intermittent reception interval control part 4e and intermittent reception is executed at a period which is (n) times as much as a basic intermittent period in accordance with the substituted intermittent interval (n). The call is made from the state of intermittent reception (C) or an incoming response is made when an incoming call arrives. Then, a system moves to the call and it returns to intermittent reception A when the call is terminated.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mobile communication system, and more particularly to a mobile communication system for performing intermittent reception in a mobile station.

[0002]

2. Description of the Related Art PHS (Personal Handy)
phone system) or PDC (persona
2. Description of the Related Art In a general mobile communication system typified by l digital cellular), when a mobile communication terminal (hereinafter, referred to as a "mobile station") waits for an incoming call signal or the like, its own (the mobile station) The receiving unit is started up only at the reception timing of the incoming signal of the group to which it belongs, and intermittently confirming the incoming call (hereinafter referred to as “intermittent reception”) to reduce power consumption.

[0003] Basically, a mobile station in a mobile communication system operates on a battery. Therefore, in a conventional mobile station, the intermittent reception interval during standby reception is fixedly extended so that the mobile station at the time of standby reception is extended. The power consumption is further reduced, and the standby time that can be achieved without replacing the battery is increased.

[0004] Intermittent reception control when a mobile station performs standby will be described using a PHS control channel as an example of a general mobile communication system.

FIG. 5 is a diagram showing an example of a configuration of an LCCH superframe which is a basic period of a PHS control channel.

In this example, a logical control channel (LCCH) interval value is set to 20 (100 msec), and an LCCH superframe structure which is a minimum period of the LCCH is represented by B
C, P1, P2, SC, P3, P4, SC, P5, P
6, SC, P7, and P8 in that order (1.2 seconds).

[0007] BC is a broadcast channel, and is a point-multipoint downlink one-way channel that broadcasts control information such as radio channel structure information, system operation information, and regulation information to mobile stations.

[0008] The SC is an individual cell channel and is a point-to-point bidirectional channel for transferring information required for call connection between a base station and a mobile station.

P1, P2, P3, P4, P5, P6, P
Reference numerals 7 and 8 denote paging channels, which are point-to-multipoint downlink one-way channels for simultaneously transferring the same information (such as an incoming call signal) for each paging channel.

In the case of the PHS, each LCCH further includes T1, T2, T3, T
4, R1, R2, R3, and R4 TDMA (Time Division Multiple Access) frames.

T1, T2, T3 and T4 are transmission slots, R1, R2, R3 and R4 are reception slots,
Actually, it is used in a combination of T1 and R1, T2 and R2, T3 and R3, and T4 and R4.

Generally, when a mobile station is powered on,
First, a search for a base station is started, and control information such as a radio channel structure (such as an LCCH superframe configuration) and system operation information transmitted on a broadcast channel is received.

[0013] Next, the mobile station, on the dedicated cell channel,
A radio link is established with the base station using the information and the like received earlier, and location registration is performed for the base station.

When the location registration is performed, the base station indicates a paging channel to which the mobile station belongs.

The paging channel is a channel for notifying a mobile station belonging to the same group when a call is received, and designates from the base station to the mobile station to receive, for example, P3 on the paging channel. If so, the mobile station is controlled to receive the incoming call signal transmitted at the timing of P3.

The mobile station confirms whether or not an incoming call signal for the mobile station is included by intermittently receiving the paging channel of the group to which the mobile station belongs (the mobile station) specified by the base station. .

Further, since the mobile station operates on a battery, it does not perform continuous reception with large power consumption when waiting for an incoming call signal or the like, but rather does not belong to itself (the mobile station). The receiving unit is started up only at the reception timing of the incoming call signal of the group, and intermittently confirming the incoming call to reduce power consumption.

Therefore, in the LCCH superframe configuration example shown in FIG. 5, since the basic cycle of each paging channel is 1.2 seconds, the basic cycle of the intermittent reception interval is also 1.2 seconds.

Next, a description will be given of a technique for reducing power consumption during standby reception of a mobile station using the conventional technique.

FIG. 2 is a basic system block diagram of a conventional mobile station.

In the basic system block diagram of the conventional mobile station shown in FIG. 2, reference numeral 1 denotes an antenna for transmission / reception, 2 denotes a transmitting unit that modulates a voice or control signal and converts it into radio waves, and 3 receives radio waves. A receiving unit 4 for detecting and demodulating and demodulating an audio signal, a communication unit is controlled by a control unit, and a central processing unit (CPU) 4a, a read only memory (ROM) 4
b, a random access memory (RAM) 4c, an intermittent reception control unit 4z, and the like.

When waiting for an incoming call signal or the like, the intermittent reception control unit 4z starts up the receiving unit only at the reception timing of the incoming call signal of the group to which the mobile station (the mobile station) belongs, and intermittently receives the incoming call signal. Operate to check. However, in the prior art mobile station, the intermittent reception interval of the incoming call signal is set as a fixed value.

Reference numeral 5 denotes a transmitting unit using a condenser microphone or the like, and reference numeral 6 denotes a receiving unit using a speaker or the like. Reference numeral 7 denotes a keyboard which is a user interface for the user to instruct the mobile station, and 8 denotes a display unit which includes a liquid crystal panel, an LED and the like and displays various information for the user.

In general, in the prior art, in order to lengthen the standby time of the mobile station, the intermittent reception interval is fixedly extended, and the number of times of activation of the receiving unit 3 which consumes relatively large power is reduced, so that the intermittent reception is performed. Low power consumption at the time.

A concrete example of a conventional mobile station from power-on to standby (intermittent reception) will be described with reference to an intermittent operation system disclosed in Japanese Patent Application Laid-Open No. Hei 3-2066741.

FIG. 4 is a diagram showing a state transition of a conventional mobile station disclosed in Japanese Patent Laid-Open No. Hei 3-206741.

In this mobile station, when the power is turned on (4-1), a search for a base station is started, and if a base station capable of wireless link is found, the location is registered with the base station (4-2).

The mobile station whose location has been registered is instructed from the base station to the group to which the mobile station belongs in the paging channel, so that the intermittent reception (intermittent reception) is performed at the basic intermittent reception interval of the group to which the mobile station belongs. Receiving A) is performed (4-3). The basic discontinuous reception interval is, for example, one LCCH in FIG.
1LCCH because the number of identical incoming groups in the superframe is 1
The superframe length is 1.2 seconds.

In the state of intermittent reception A (4-3), a call is made or, if there is an incoming call, the call is answered and the call is transferred (4-6). Reception A (4
Return to -3).

In the state of intermittent reception A (4-3), if there is no call or incoming call for more than 5 minutes, the mobile station will fix the intermittent reception interval once every 30 seconds to the base station. "Intermittent operation notification" is transmitted (4-
4) Shift to intermittent reception B in which the intermittent reception interval is set to once every 30 seconds (4-5).

From the state of the intermittent reception B (4-5), a call is made, or if there is an incoming call, the call is answered (4-6). Receive A
Return to (4-3).

In this conventional example, the intermittent reception interval is the first 5
The intermittent reception is continued at the basic cycle for minutes, but if there is no incoming or outgoing call for 5 minutes or more, a “intermittent operation notification” is transmitted to the base station with the intermittent reception interval being once every 30 seconds.
Means for reducing power consumption by setting the intermittent reception timing of the mobile station to once every 30 seconds has been taken.

[0033]

However, in the above-mentioned conventional method of extending the intermittent reception interval of the mobile station in a fixed manner,
While the overall standby time increases due to low power consumption during standby, the reception response of the incoming signal deteriorates during the daytime when reception frequency is high, or the incoming signal cannot be received depending on the radio wave condition. However, there are drawbacks such as an inability to answer a call.

The conventional method contributes to a reduction in power consumption in a time zone in which calls are generally considered to be small, such as late at night or early in the morning. In the band, the timing of receiving the incoming call signal is delayed by the length of the intermittent reception timing interval, and the response of the incoming call response is deteriorated.

Particularly, in a PHS or the like, a mobile station may be registered as a slave unit in a self-operating base station (home base unit) having a handset including a ringer, and even when the ringer of the self-operating base station rings due to an incoming call. , Mobile station (slave) side up to about 3
Since the incoming call signal cannot be received for 0 seconds, a phenomenon occurs in which the ringer does not ring for a maximum of about 30 seconds or more.

The same is true for a public base station. On the contrary, the situation is more serious because the public base station does not have a ringer. In the public base station, the ringing signal of the mobile station will continue to transmit a ringing signal for a maximum of about 30 seconds before the ringer rings, and even if the mobile station user immediately responds to the ringing immediately after the ringer rings. From the point of view of the user who made the call, the user has been waiting for a response for about 30 seconds.

Even if it is a mobile phone, if there is no response for 30 seconds during the day, there is a possibility that some of the users who made the call will give up the response from the other party, and the mobile station user will give up 30 seconds. If the call is cut off within seconds, there is a problem that the ringer of the mobile station does not ring once and the user does not notice the incoming call at all.

In addition, if the intermittent reception interval is fixedly increased, the chance of receiving an incoming call signal is reduced, so that the incoming call signal cannot be normally received and the incoming call cannot be answered in a poor radio wave condition. There is a problem.

Further, according to the invention disclosed in Japanese Patent Laid-Open Publication No. Hei 3-206671, when the mobile station extends the intermittent reception interval fixedly, a specific value is instructed from the mobile station side to the base station. Is designed to transmit an incoming call signal at a timing corresponding to this.

However, this indicates that the mobile station must negotiate with the base station to extend the intermittent reception interval.

If the intermittent reception interval value transmitted by each mobile station is not an integral multiple of the basic intermittent reception interval, the base station uses the basic period of the control signal so that each mobile station can receive. Certain LCCH superframe structures may need to be modified.

However, since a general conventional base station does not have a function corresponding to the "intermittent operation notification", a mobile station using the above technology in an actual mobile communication system such as PHS, PDC, etc. Not adopted.

That is, even if the mobile station transmits such a message as “intermittent operation notification”, the LCCH superframe structure of the base station is not changed according to the convenience of the mobile station.

The present invention has been made in view of the above points, and it is an object of the present invention to provide a mobile communication system capable of achieving both low power consumption during standby reception and improved call response. I do.

[0045]

According to the present invention, in order to achieve the above object, in a mobile communication system in which a mobile station performs intermittent reception, an intermittent reception interval control for arbitrarily changing the intermittent reception interval of the mobile station is provided. It is characterized by having means.

[0046]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a block diagram showing a configuration of a mobile station according to the first embodiment of the present invention.

In FIG. 1, reference numeral 1 denotes an antenna for transmission / reception, 2 denotes a transmitting unit which modulates a voice or control signal and converts it into radio waves, and 3 receives radio waves, and detects and demodulates them to receive a voice signal. The units 4 are control units for controlling communication and the like. The control unit 4 includes a central processing unit (CPU) 4a,
It comprises a read only memory (ROM) 4b, a random access memory (RAM) 4c, an intermittent reception interval setting unit 4d, an intermittent reception interval control unit 4e, and the like.

When the intermittent reception interval control unit 4e waits for an incoming call signal or the like, the intermittent receiving interval control unit 4e starts up the receiving unit only at the reception timing of the incoming call signal of the group to which the mobile station (the mobile station) belongs, and intermittently receives the incoming signal. Operate to confirm the call.

The intermittent reception interval value of the incoming call signal is variably determined by the intermittent reception interval setting unit 4d, and the optimum value according to the situation is instructed to the intermittent reception interval control unit 4e.

Reference numeral 5 denotes a transmitting unit using a condenser microphone or the like, and reference numeral 6 denotes a receiving unit using a speaker or the like.

Reference numeral 7 denotes a keyboard which is a user interface for the user to give instructions to the mobile station, and 8 denotes a display unit which comprises a liquid crystal panel, an LED and the like and displays various information for the user.

Next, the operation of this embodiment will be described.

According to the present invention, by intermittently changing the intermittent reception interval of only the mobile station, it is possible to achieve both low power consumption during standby reception and improvement in the incoming call response, which is a problem of the prior art. It provides a system configuration that can be used.

FIG. 3 is a diagram showing a state transition of the mobile station in the mobile communication system according to the embodiment shown in FIG.

The mobile station of this embodiment is powered on (3
When -1) is performed, a search for a base station is started, and if a base station capable of wireless link is found, the location is registered with the base station (3-
2).

The mobile station for which location registration has been completed is instructed by the base station to belong to the group to which the mobile station belongs in the paging channel, so that the group to which the mobile station belongs is intermittently received in the basic cycle (intermittent reception A). (3-3).

In the state of the intermittent reception A (3-3), a call is made, or if there is an incoming call, the incoming call is answered to shift to a call (3-6). Reception A (3
Return to -3).

In the state of the intermittent reception A (3-3), if an outgoing call or an incoming call does not exceed a predetermined time within an arbitrarily determined time, the intermittent reception interval value n ( 3-7) is assigned to the intermittent reception interval control unit 4e (3-4), and intermittent reception is performed at a cycle n times the basic intermittent reception cycle according to the assigned intermittent reception interval value n (intermittent reception C ( 3-5)).

From the state of the intermittent reception C (3-5), a call is made, or if there is an incoming call, the call is answered and the call is transferred (3-6). Receive A
Return to (3-3).

In the state of intermittent reception C (3-5), intermittent reception is performed at a cycle n times the basic intermittent reception cycle. However, it is always necessary to reduce power consumption during standby reception and to improve the response to incoming calls. (3) at predetermined time intervals
The state transits to the state of 4), and the current optimum intermittent reception interval value n set by the intermittent reception interval setting unit 4d is reassigned to the intermittent reception interval control unit 4e, so that the value is newly assigned to the intermittent reception interval control unit 4e. The intermittent reception is continued at a cycle n times the basic intermittent reception cycle (intermittent reception C (3-5)).

The intermittent reception interval setting section 4d in the mobile station according to the present embodiment determines the current optimum intermittent reception interval value n based on any of the current time, the incoming call frequency and the like.

FIG. 6 shows a first example of a method of determining the intermittent reception interval value n in the intermittent reception interval setting section 4d of the present embodiment.

FIG. 6 is a table showing an example of a setting in a case where the optimum intermittent reception interval value n at the present time is determined based on the current time.

This is based on the fact that the mobile station of the present embodiment has means for arbitrarily setting an optimum intermittent reception interval value n, and it is considered that there are generally few incoming calls such as late nights and early mornings. In the time zone, the intermittent reception interval is set to be long to reduce power consumption during standby, while the time zone in which the call frequency is generally high, such as during the daytime, is set by setting the intermittent reception interval to be relatively short. This is to improve the daytime call response response, which has been a problem of the above.

In the case of the first example, the intermittent reception C (3-5)
The time interval at which the state transitions from the state (1) to the state (3-4) in which the new intermittent reception interval value is assigned to the intermittent reception interval control unit 4e is at least in each time zone (early morning, morning, daytime, night, midnight). Etc.).

The setting example shown in FIG. 6 is an example of an intermittent reception interval value setting table in consideration of a general user who frequently receives calls during the day. An intermittent reception interval value setting table or the like is prepared, and an optimal intermittent reception interval value setting table can be selected from a plurality of setting tables by operating input means such as the keyboard 7 of the mobile station for each user of the mobile station. Is also good.

FIG. 7 shows a second example of the method of determining the intermittent reception interval value n in the intermittent reception interval setting section 4d of the present embodiment.

FIG. 7 is a table showing an example of setting when the current optimum intermittent reception interval value n is determined based on the incoming call frequency.

This utilizes the fact that the mobile station of the present embodiment has a means for arbitrarily setting an optimal intermittent reception interval value n. When the number of incoming calls per fixed time is small, the intermittent reception interval is set. By setting a long setting to reduce power consumption during standby, when the number of calls per fixed time is large, on the other hand, by setting the intermittent reception interval to be relatively short, the conventional problem of daytime Is intended to improve the incoming call response.

In the second example, since there is provided a means for constantly monitoring the frequency of incoming calls, optimal intermittent reception control can be performed even for mobile station users whose time zones during which incoming calls are concentrated differ depending on the day.

In the case of the second example, intermittent reception C (3-5)
The time interval for the state transition from the state of (1) to the state of (3-4) in which the new intermittent reception interval value is assigned to the intermittent reception interval control unit 4e is smaller every 20 minutes rather than every hour. The more accurate current incoming call frequency is reflected in the determination of the intermittent reception interval value n, and more optimal intermittent reception control becomes possible.

The setting example shown in FIG. 7 is an example of an intermittent reception interval value setting table in which the intermittent reception interval value is determined based on the number of incoming calls per hour.
An intermittent reception interval value setting table for the number of incoming calls per minute or two hours may be used.

In both the first and second examples, the radio wave condition is taken into consideration as means for determining the intermittent reception interval value, so that when the radio wave condition deteriorates and the reception probability of the incoming call signal decreases, In addition, the intermittent reception interval can be corrected to be short, and the reception probability of the incoming call signal can be improved. The means for confirming whether the radio wave condition is good or not can be realized by using a reception error counter, which will be described in detail later.

Next, a second embodiment according to the present invention will be described.

In the first embodiment described above, the means for determining the intermittent reception interval value is based on either the current time or the incoming call frequency. However, the intermittent reception interval value is determined based on two or more conditions. By determining the reception interval value, a more reasonable and optimal intermittent reception interval value can be determined.

The second embodiment is directed to a mobile station having a means for determining an intermittent reception interval value in consideration of a plurality of conditions such as the current time, the frequency of incoming calls, the radio wave condition, and the like.

As a second embodiment, FIG. 8 is a block diagram of a mobile station when the current time and the incoming call frequency are used as means for determining the current optimum intermittent reception interval value. FIG. 9 shows a setting example of the intermittent reception interval correction value m with respect to FIG.
Shown in

FIG. 8 shows an example of the configuration of a mobile station according to the present embodiment. In the intermittent reception interval setting section 4d, a clock 4d-1 for obtaining the current time and a call frequency counter for obtaining the call frequency are set. 4d-2, and is characterized by performing more rational and optimal intermittent reception by considering the values of both the clock 4d-1 and the call frequency counter 4d-1.

However, if there is a clock or a call frequency counter other than the intermittent reception interval setting unit 4d, only the clock value and the signal of the call frequency counter value are transmitted to the intermittent reception interval setting unit 4d.
The intermittent reception interval value n may be determined by incorporating the value into d.

The output value of the intermittent reception interval setting section 4d of the mobile station according to the present embodiment is obtained by adding the intermittent reception interval correction value m shown in FIG. 9 to the intermittent reception interval value n in the time zone shown in FIG. Value.

This embodiment is characterized in that there is provided a means for correcting, for each user, the intermittent reception interval determined based on the time zone according to the incoming call frequency at each time.
Even if incoming calls are suddenly concentrated during a time period when there are few normal incoming calls, there is an effect that the incoming call response can be promptly improved.

Next, a third embodiment according to the present invention will be described.

As a third embodiment, FIG. 10 is a block diagram of a mobile station in the case where the present time and the quality of the radio wave condition obtained from the reception error frequency are used as means for determining a current optimum intermittent reception interval value. FIG. 11 shows a setting example of the intermittent reception interval correction value j with respect to the reception error counter value.

FIG. 10 shows an example of the configuration of the mobile station according to the present embodiment. In the intermittent reception interval setting section 4d, a clock 4d-1 for obtaining the current time and a reception error counter for obtaining the quality of the radio wave condition are provided. 4d-3, and is characterized by performing more rational and optimal intermittent reception by considering both the value of the clock 4d-1 and the value of the reception error counter 4d-3.

However, if there is a clock or a reception error counter other than the intermittent reception interval setting section 4d, only the clock value and the signal of the reception error counter value are taken into the intermittent reception interval setting section 4d and the intermittent reception interval value is set. You may decide.
The reception error counter value is counted up when the received signal cannot be demodulated normally due to a bit error, a frame error or the like.

The output value of the intermittent reception interval setting section 4d of the mobile station according to the present embodiment is determined by the intermittent reception interval value n in the time zone shown in FIG. 6 and the number of reception errors per unit time shown in FIG. This is a value obtained by adding the intermittent reception interval correction value j.

In the present embodiment, the unit time for measuring the number of reception errors is set to one minute, and the intermittent reception interval correction value j is set by discriminating the error frequency into three stages. However, this is merely an example. Yes, other values may be used depending on the communication standard, control channel structure, and the like.

The present embodiment is characterized in that it has means for compensating the intermittent reception interval determined based on the time zone for each user according to the quality of the radio wave condition at each time, so that reception errors increase. This has the effect that the probability of normal reception can be improved by correcting the intermittent reception interval to be shorter in a poor radio wave condition.

Next, a fourth embodiment according to the present invention will be described.

As a fourth embodiment, the present time, the incoming call frequency and the quality of the radio wave condition are used as means for determining an optimal intermittent reception interval value at the present time, and the second embodiment and the third embodiment are used. FIG. 12 is a block diagram of a mobile station having both the features of the first embodiment and the second embodiment.

FIG. 12 shows an example of the configuration of a mobile station according to the present embodiment. In the intermittent reception interval setting unit 4d, a clock 4d-1 for obtaining the current time and a call frequency counter 4d- for obtaining the call frequency. 2 and a reception error counter 4d-3 for obtaining the quality of the radio wave condition. By considering all values of the clock 4d-1, the call frequency counter 4d-2, and the reception error counter 4d-3, It is characterized by performing more rational and optimal intermittent reception than the other embodiments described above.

However, as in the other embodiments described above, when a clock, a call frequency counter or a reception error counter is present other than the intermittent reception interval setting section 4d,
Only the signals of the clock value, the call frequency counter value, and the reception error counter value may be taken into the intermittent reception interval setting unit 4d to determine the intermittent reception interval value.

The output value of the intermittent reception interval setting section 4d of the mobile station according to the present embodiment is obtained by changing the intermittent reception interval value n according to the time zone shown in FIG. 6 to the intermittent reception interval correction value m shown in FIG. The intermittent reception interval correction value j determined from the number of reception errors per unit time shown in FIG.

The present embodiment is characterized in that there is provided a means for correcting the intermittent reception interval determined based on the time zone for each user according to the incoming call frequency and the quality of the radio wave condition at each time. Even if incoming calls are suddenly concentrated during a time when there are few calls, the incoming call response is immediately improved, and the intermittent receiving interval is corrected to be short in the poor radio wave condition where reception errors increase so that normal reception is possible. Has the effect that it is possible to improve the probability of

In each of the above embodiments, the conditions (time zone, frequency, etc.) for determining the intermittent reception interval value n and the setting data are better suited to the environment of each mobile station user. In order to adapt, the user may be able to arbitrarily set the input for each user from the keyboard 7 of the mobile station.

Further, the current intermittent reception interval and various setting values may be displayed on a display means such as the display unit 8 of the mobile station so that the user of the mobile station can easily recognize the current intermittent reception interval.

[0098]

As described above, arbitrarily changing the intermittent reception interval as in the present invention can reduce power consumption by setting the intermittent reception interval to be long in a time period in which there are few incoming calls. On the other hand, in a time zone in which the frequency of incoming calls is high, there is an effect of optimizing the conflicting effects such as improving the incoming call response by shortening the intermittent reception interval, and achieving both effects.

Further, when the intermittent reception interval is arbitrarily changed, the intermittent reception interval is changed by an integral multiple of the basic intermittent reception cycle of the group to which the mobile station (self) belongs according to the LCCH superframe structure transmitted by the base station. If the base station does not need to change the LCCH superframe structure itself according to the mobile station as in the conventional example, the base station transmits "intermittent operation notification" to notify the base station of the change in the intermittent reception interval, and There is no need to negotiate with the user.

In the conventional example disclosed in Japanese Patent Laid-Open No. Hei 3-206671, in a general mobile communication system such as PHS or PDC which does not support "intermittent operation notification", the base station itself must be changed. On the other hand, the mobile communication system of the present invention has an effect that all mobile communication systems that perform intermittent reception during standby can exhibit the effect by an easy change of only the mobile station.

Further, the mobile station according to the present invention takes the radio wave condition into consideration as a means for determining the intermittent reception interval value, so that the radio wave condition, which has been a problem in the past, becomes worse and the reception probability of the incoming call signal decreases. Also, the intermittent reception interval can be corrected to be short, and there is an effect that the reception probability of the incoming call signal is improved.

[Brief description of the drawings]

FIG. 1 is a block diagram illustrating a configuration of a mobile station according to a first embodiment of the present invention.

FIG. 2 is a basic system block diagram of a conventional mobile station.

FIG. 3 is a diagram showing a state transition of a mobile station in the mobile communication system according to the embodiment shown in FIG.

FIG. 4 is a diagram showing a state transition of a conventional mobile station disclosed in Japanese Patent Laid-Open Publication No. Hei 3-206741.

FIG. 5 is an LCC serving as a basic cycle of a control channel of a PHS.
It is a figure showing an example of 1 composition of an H superframe.

FIG. 6 is a table illustrating a setting example when an optimum intermittent reception interval value n at the present time is determined based on a current time.

FIG. 7 is a table illustrating an example of a setting in a case where an optimum intermittent reception interval value n at the present time is determined based on an incoming call frequency;

FIG. 8 is a block diagram illustrating a configuration of a mobile station according to the second embodiment of the present invention.

FIG. 9 is a table showing an example of setting an intermittent reception interval correction value m with respect to an incoming call frequency counter value.

FIG. 10 is a block diagram illustrating a configuration of a mobile station according to a third embodiment of the present invention.

FIG. 11 is a table showing an example of setting an intermittent reception interval correction value j with respect to a reception error counter value.

FIG. 12 is a block diagram illustrating a configuration of a mobile station according to a fourth embodiment of the present invention.

[Explanation of symbols]

 Reference Signs List 1 antenna 2 transmission unit 3 reception unit 4 control unit 4a CPU 4b ROM 4c RAM 4d intermittent reception interval setting unit 4e intermittent reception interval control unit 4z intermittent reception control unit 5 transmission unit 6 reception unit 7 keyboard 8 display unit

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[Procedure amendment]

[Submission Date] April 7, 2000 (200.4.7)

[Procedure amendment 1]

[Document name to be amended] Statement

[Correction target item name] Claim 1

[Correction method] Change

[Correction contents]

[Procedure amendment 2]

[Document name to be amended] Statement

[Correction target item name] 0045

[Correction method] Change

[Correction contents]

[0045]

The present invention SUMMARY OF] To achieve the above object, in a mobile communication system in which mobile station performs intermittent reception making a call through the base station, to the mobile station
Have a listen interval control means for arbitrarily changing the intermittent reception interval of the mobile station, the intermittent receiving the basic period from the base station
If there is no outgoing or incoming call for a certain period of time,
Arbitrary intermittent reception interval of the mobile station by the communication interval control means
And when the call ends, the basic
The feature is that intermittent reception is performed during the period .

Claims (8)

[Claims] 1. A mobile communication system in which a mobile station performs intermittent reception, the mobile communication system comprising intermittent reception interval control means for arbitrarily changing the intermittent reception interval of the mobile station. 2. The intermittent reception interval that is arbitrarily changed,
The mobile communication system according to claim 1, wherein the mobile communication system is a positive multiple of a basic intermittent reception cycle. 3. The intermittent reception interval according to claim 1, wherein the intermittent reception interval is changed based on one or a combination of a current time, a call frequency, and a radio wave condition. Mobile communication system. 4. The mobile communication system according to claim 1, further comprising means for resetting a currently optimum intermittent reception interval at every fixed or variable predetermined time. 5. The mobile communication according to 1, 2, 3, or 4, wherein the control unit provided in the mobile station and performing control relating to intermittent reception has data for conditions and setting values for determining the intermittent reception interval. system. 6. The system according to claim 1, wherein data for a condition and a set value for determining said intermittent reception interval can be set by an external input means provided in said mobile station.
3. The mobile communication system according to claim 1. 7. The mobile communication according to claim 1, wherein the current intermittent reception interval and a set value relating to the current intermittent reception interval are displayed on display means provided in the mobile station. system. 8. A mobile station in the mobile communication system according to claim 1.