JPH0720281B2 - Mobile communication system - Google Patents

Description

The present invention relates to mobile communication in which a mobile radio station receives a selective call signal in a time slot assigned to an intermittent reception group to which the mobile radio station belongs, such as a radio paging system. In particular, the present invention relates to a control traffic equalization technique for equalizing the congestion / disturbance state of selective calls for each intermittent reception group.

(Prior Art) A mobile communication system targeted by the present invention is, for example, a radio paging system known as a so-called pager system, and includes a radio base station and a large number of mobile stations divided into a plurality of intermittent reception groups. It is composed of a wireless station. In this type of mobile communication system, a large number of mobile radio stations are divided into a plurality of intermittent reception groups for the purpose of reducing the power consumption during reception standby of the mobile radio stations, and the control wireless channel is divided into each intermittent reception group. A correspondingly allocated time slot is provided, and the radio base station transmits a selective call signal to be transmitted to the mobile radio station when there is an incoming call from the exchange in the time slot assigned to the intermittent reception group to which the mobile radio station belongs, On the other hand, in each mobile radio station,
An intermittent reception method is adopted in which the selective call signal is received in the time slot assigned to the intermittent reception group to which the self belongs and the power of the transceiver is turned off during the remaining time slots.

(Problems to be Solved by the Invention) However, in the intermittent reception system in the conventional mobile communication system, since the mobile radio station is fixedly assigned to a specific intermittent reception group, a part of the intermittent reception group is fixed. However, there is a problem that only the selective call related to the above is congested, and there is a high risk that other intermittent reception groups will be in a non-disturbed state.

The present invention has been made in view of such a conventional problem, and its object is to specify the intermittent reception group to which a wireless base station belongs to a mobile radio station according to the congestion / disturbance state of the selective call for each intermittent reception group. By providing such a method, it is possible to provide a mobile communication system capable of leveling the congestion / disturbance state of selective calling for each intermittent reception group.

(Means for Solving Problems) In order to achieve the above object, the mobile communication system of the present invention has the following configuration.

That is, the mobile communication system of the present invention comprises a radio base station and a large number of mobile radio stations divided into a plurality of intermittent reception groups, and each mobile radio station is assigned a time assigned to the intermittent reception group to which it belongs. In a mobile communication system that receives a selective call signal in a slot; the radio base station, when returning an acknowledgment signal to the mobile radio station that has sent the location registration signal, determines the amount of traffic in each of the plurality of intermittent reception groups. The mobile radio station comprises traffic control means for transmitting instruction information for instructing the intermittent reception group to which the mobile radio station should belong in the future,
Further, the mobile radio station changes the time slot stored in the storage means for storing the time slot of the intermittent reception group to which it belongs to the time slot assigned to the intermittent reception group indicated by the command information. And a changing means;

(Operation) Next, an operation of the mobile communication system of the present invention having the above-described configuration will be described.

The mobile communication system targeted by the present invention is, for example, a radio base station and a large number of mobile radio stations divided into a plurality of intermittent reception groups, such as a radio paging system known as a so-called pager system. Composed. In this type of mobile communication system, each mobile radio station receives the selective call signal in the time slot assigned to the intermittent reception group to which it belongs, and the transmitter / receiver power is turned off during the remaining time slot to receive the signal. We are trying to reduce power consumption during standby.

By the way, when performing location registration in this type of mobile communication system, the mobile radio station turns on the power of the transceiver at an arbitrary time, transmits a location registration signal to the radio base station, and sends a confirmation response from the radio base station. It is designed to receive signals.

Therefore, in the present invention, the mobile radio station stores the time slot assigned to the intermittent reception group to which the mobile radio station belongs, in the storage means, and receives the selective call signal from the radio base station in the stored time slot. Then, when a certain mobile radio station transmits a location registration signal at an arbitrary time, in the radio base station, when returning the confirmation response signal to the mobile radio station that has transmitted the location registration signal, the traffic control means is Based on the determination result of the traffic volume in each of the intermittent reception groups, the mobile radio station transmits command information for instructing the intermittent reception group to which it should belong. In response to this, in the mobile radio station, the changing unit changes the time slot stored in the storage unit to the time slot assigned to the intermittent reception group commanded by the command information.

As a result, the wireless base station transmits the selective call signal in the time slot of the intermittent reception group that has been instructed to change, and the mobile radio station uses the time slot assigned to the new intermittent reception group to which it belongs. A selective call signal will be received.

As described above, according to the mobile communication system of the present invention, since the intermittent reception group to which the mobile radio station should belong can be designated by the confirmation response signal when the mobile radio station registers the location, the radio base station registers the location. In determining the intermittent reception group to which the mobile radio station should belong, it is possible to associate a large number of mobile radio stations with the intermittent reception group in which the selective call signal is relatively in a non-transient state. As a result, there is an advantage that the congestion / disturbance state can be equalized for each intermittent reception group.

(Example) Hereinafter, the Example of this invention is described with reference to drawings. First
FIG. 2 and FIG. 2 show a radio base station and a mobile radio station according to an embodiment of the present invention.

As shown in FIG. 1, the radio base station includes a data line unit 1, a control unit 2, an incoming data transmission unit 3, a transceiver 4, an antenna 5, a radio data transceiver 6, and a transceiver 7. ,
The antenna 8 is basically provided.

The data line unit 1 forms an interface with an exchange (not shown) and transmits an incoming call signal from the exchange to the control unit 2.

Upon receipt of the incoming call signal, the control unit 2 determines which intermittent reception group the mobile radio station associated with the incoming call belongs to, and specifies the determined intermittent reception group or recognizes the mobile radio station related to the incoming call. The number or the like is sent to the incoming data transmission unit 3. Here, in the determination of the intermittent reception group, as will be described later, in the case of an incoming call to a mobile radio station to which the allocation of the intermittent reception group to which the mobile radio station belongs has been changed, specify the changed intermittent reception group. become.

The incoming data transmission unit 3 inserts the identification number of the mobile radio station into the corresponding time slot of the incoming control channel.
The incoming control channel is, for example, # 1 as shown in FIG.
To #n, each time slot is associated with an intermittent reception group in a one-to-one correspondence.

As described above, a large number of mobile radio stations are assigned to one intermittent reception group.

The transceiver 4 receives the output of the incoming data transmission unit 3, converts it into a radio frequency, and transmits it via the antenna 5 to all mobile radio stations under control.

That is, the selective call signal is transmitted to the mobile radio station.

On the other hand, the position registration signal transmitted by the mobile radio station at an arbitrary time is input to the control unit 2 via the antenna 8, the transceiver 7, and the radio data transmission / reception unit 6, so that the control unit 2 transmits / receives data to / from the radio data transmission / reception unit 6. When an acknowledgment signal is returned via the machine 7 and the antenna 8, the congestion of the selective call for each intermittent reception group
The intermittent reception group to which the mobile radio station should belong should be determined in consideration of the out-of-order condition, and if there is a change according to this decision, the allocation of the mobile radio station is changed and the designated signal of the intermittent reception group related to the decision result. Is inserted in a predetermined area provided in the confirmation response signal.

Therefore, the control unit 2 has a function of traffic control means. Here, the control unit 2 can associate a large number of mobile radio stations with the intermittent reception group in which the selective call signal is relatively in a quiescent state when determining the intermittent reception group to which the position-registered mobile wireless station should belong. . As a result, according to the present invention, it can be expected that the congestion / disturbance state of the selective call signal for each intermittent reception group is leveled.

Next, the mobile radio station, as shown in FIG.
, Memory 22, timer 23, transceiver 24, antenna
25 and basically are provided.

The memory 22 stores a time slot (eg, # 1) assigned to the intermittent reception group to which the mobile radio station belongs.

The timer 23 receives a command from the control unit 21 and measures a certain time (for example, the time from time slot # 2 to time slot # 1), and when the time slot # 1 is reached, the transmitter / receiver 24 is turned on. In addition, the elapsed time of the time slot # 1 is counted, and the power of the transceiver 24 is turned off after the elapsed time.

Thus, while the transceiver 24 is on, the antenna 5
The selective call signal received at is taken into the control unit 21, and the control unit 21 determines whether or not the selective call signal is addressed to the own station.

On the other hand, when a position registration request is generated, the control unit 21 turns on the power of the transceiver 24 for a predetermined time, transmits a position registration signal, and receives a confirmation response signal for the position registration signal. At this time,
The control unit 21 checks from the designated signal of the intermittent reception group included in the confirmation response signal whether or not the intermittent reception group to which the own station should belong in the future is different from the previous intermittent reception group, and when it is different, During that time, the contents stored in the memory 22 are changed to the time slot (for example, # 2) assigned to the reception group,
After that, the timer 23 is controlled so as to receive the selective call signal in the time slot # 2. Therefore, the control unit 21 has a function of changing means.

(Effects of the Invention) As described in detail above, according to the mobile communication system of the present invention,
Since the intermittent reception group to which the mobile radio station should belong can be specified by the confirmation response signal when the mobile radio station registers its position, the radio base station determines the intermittent reception group to which the mobile radio station whose position has been registered should belong. It is possible to associate a large number of mobile radio stations with an intermittent reception group in which the selective call signal is relatively in a quiet state. As a result, there is an advantage that the congestion / disturbance state can be equalized for each intermittent reception group.

[Brief description of drawings]

FIG. 1 is a configuration block diagram of a radio base station according to an embodiment of the present invention, FIG. 2 is a configuration block diagram of a mobile radio station, and FIG. 3 is a diagram showing a configuration of an incoming control channel. 1 ... Data line section, 2 ... Control section, 3 ... Incoming data transmission section, 4 ... Transceiver, 5 ... Antenna, 6 ... Wireless data transmission / reception section, 7 ... Transceiver, 8 ... Antenna ,twenty one
...... Control unit, 22 …… Memory, 23 …… Timer, 24 …… Transceiver, 25 …… Antenna.

Continuation of the front page (51) Int.Cl. ⁶ Identification number Office reference number FI Technical indication location 7304-5K H04Q 7/04 C 7304-5K H04B 7/26 106 B (72) Inventor Kenji Imamura Yokosuka City, Kanagawa Prefecture Take 1-chome 2356, Nippon Telegraph and Telephone Corporation, Second Communication Network Research Laboratory (72) Inventor Kiyoto Nagata Take 1-23, Take, Yokosuka City, Kanagawa Japan Telegraph and Telephone Corporation Second Research Laboratory Toshiyuki Ikeda

Claims (1)

[Claims] 1. A radio base station and a large number of mobile radio stations divided into a plurality of intermittent reception groups, each mobile radio station being a selective call signal in a time slot assigned to the intermittent reception group to which it belongs. In a mobile communication system for receiving a confirmation response signal to the mobile radio station that has transmitted the location registration signal, the radio base station determines whether the traffic amount in each of the plurality of intermittent reception groups is determined based on the determination result. The mobile radio station comprises traffic control means for transmitting command information indicating an intermittent reception group to which the mobile radio station should belong, and the mobile radio station stores the time slot of the intermittent reception group to which the mobile radio station belongs; Changing means for changing the time slot stored in the means to the time slot assigned to the intermittent reception group indicated by the command information; Shin method.