JPH04306925A - Battery saving control system - Google Patents

Abstract

PURPOSE:To attain rational saving by informing a period control signal of saving to a mobile equipment through an outgoing control channel in response to the traffic of a position registration signal or a dial signal on an incoming control channel. CONSTITUTION:A means detecting a traffic of a dial signal included in an incoming control channel sent from each mobile equipment to a radio base station in control A is provided to a public communication network side or a radio base station. Then a signal to set a battery saving period corresponding to the traffic of the position registration signal is informed to each mobile equipment under the control of the radio base station through an outgoing channel to set the battery saving period of each mobile equipment. Each mobile equipment receives this signal and starts the reception of the call signal for the designated battery saving period.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a battery saving control method for a mobile device in mobile communications.

0002

BACKGROUND OF THE INVENTION Conventional battery saving techniques in mobile communications are aimed primarily at extending the lifespan of power supplies in mobile devices. FIG. 7 is a diagram showing an example of the configuration of a conventional mobile communication system, in which a plurality of switching centers 2-1 to 2-3
and a public communication network 1 including a storage device 4 connected to an exchange, wireless base stations 3-1 to 3-3 connected to the exchange via a transmission line, and wireless base stations connected to the wireless base station via a wireless line. This figure shows a mobile communication system composed of mobile stations 5-1 to 5-3 connected to each other.

FIG. 8 is a diagram illustrating an example of battery saving control in a conventional mobile communication system. It shows about control. As shown in FIG. 8, each mobile device only needs to turn on the power of the receiving section when the paging information signal of the group to which it belongs is transmitted, and only needs to operate the control section at other times. . In this way, by dividing each mobile device into groups and performing intermittent reception to reduce the average current consumption of the battery of each mobile device, the battery saving effect can be greatly improved. In the example of FIG. 8, by dividing the mobile devices into 10 groups, the power consumption of the mobile devices is reduced to about one-tenth of that in the case of continuous reception.

[0004] As described above, increasing the number of groups improves the battery saving effect, but increasing the number of groups too much increases the delay in ringing time, which increases the burden of call control processing on the network side and the connection delay time. To increase. Conversely, if the number of groups is reduced, the battery saving effect will not be improved, but the call control processing and connection delay time on the network side will be reduced. In general, in a mobile communication system that performs such battery saving control, the number of groups, connection delay time, incoming call processing capacity, and mobile device battery are adjusted based on the conditions described above. Taking the saving effect into consideration, a certain battery saving cycle is set according to the call processing capacity during average traffic.

[0005]

[Problem to be solved by the invention] In the conventional case, as mentioned above, control was always performed at a constant battery saving cycle, so even if the traffic volume changed, it was necessary to continue sending the incoming call signal for a predetermined fixed period of time. there were. In other words, even when the amount of traffic increases, the call processing time per incoming call is limited to the call processing capacity at average traffic, so calls are held on the network side and connection delay time increases. There was a problem in that it was not possible to dynamically set call processing capacity according to traffic. Similarly, even if the amount of traffic decreases, the battery saving cycle is constant, so you can only get a certain amount of battery saving effect, and although it would have been possible to extend the battery life of the mobile device, it is not possible to do so. The problem was that it was not possible.

[0006]

SUMMARY OF THE INVENTION The present invention has been accomplished in order to solve the above-mentioned problems. That is, the invention of claim 1 is a mobile communication system comprising at least one wireless base station and at least one mobile device connected to the wireless base station via a wireless line, in which the wireless base station and the mobile device communicate with each other. In between, there is an uplink control channel from the mobile device to the radio base station and a downlink control channel from the radio base station to the mobile device, and the mobile device intermittently receives an incoming call signal from the radio base station. In a battery saving control method that reduces the power consumption of a mobile device, the amount of traffic transmitted to a wireless base station via a downlink control channel is determined according to the traffic amount of the location registration signal or calling signal of the mobile device included in the uplink control channel. The invention of claim 2 is a battery saving control method that sets a battery saving cycle of a mobile unit by notifying the mobile unit of a signal for controlling the battery saving cycle, This is a battery saving control method in which the radio base station is notified of the battery saving cycle of the mobile device through a channel, and the base station performs a paging signal transmission operation based on this information.

[0007]

[Operation] The invention of claim 1 provides means for detecting the traffic of calling signals included in the uplink control channel transmitted from each mobile device to the radio base station on the public communication network side or the radio base station side. A signal for setting a battery saving period corresponding to the traffic amount of the registration signal is broadcast to each mobile device under the control of the wireless base station via a downlink control channel, and a battery saving period for each mobile device is set. Note that the traffic amount of the location registration signal has a correspondence with the traffic amount of the calling signal when the distribution of mobile devices is uniform, so it can be used in the same way. In this case, there is an advantage that control using the calling signal is simpler.

[0008] Furthermore, the invention of claim 2 provides that the user of the mobile device can select the battery saving period by himself/herself regardless of the amount of traffic such as location registration signals included in the uplink control channel, and wireless The base station is notified of the battery saving cycle, and the service is provided at the battery saving cycle that the base station desires.

FIG. 1 is a diagram showing the relationship between the battery saving cycle and the unit time power consumption of a mobile device, and FIG. 2 is a diagram showing the relationship between the battery saving cycle and the processing time of call control. As shown in FIG. 1, in general, the longer the battery saving period is, the smaller the unit time power consumption of the mobile device is, and as shown in FIG. 2, the processing time for call control tends to be longer. In the present invention, as shown in the figure, when the amount of traffic is low, there is sufficient call processing capacity on the network side, so the power consumption of the mobile device is reduced by increasing the battery saving cycle and reducing the call processing capacity to some extent. By making it smaller, we aim to extend the lifespan of the mobile device's power supply. Furthermore, when the amount of traffic is large, the call processing time per incoming call is shortened, that is, the battery saving cycle is shortened to improve call processing capacity.

0010

Embodiment FIGS. 3 and 4 are diagrams illustrating an embodiment of the battery saving control method of the present invention. As shown in these figures, mobile devices are grouped into 10 main groups (
Group 1 to Group 10), and each group is further divided into two subgroups H and L (Group 1L to Group 10L and Group 1H to Group 10H). When the network side detects that the amount of traffic for calling signals or location registration signals is small, the battery saving period is increased as shown in FIG. 3, and paging signals are sequentially transmitted in correspondence with subgroups. Furthermore, when the amount of traffic is large, the battery saving cycle is set to a small value as shown in FIG. 4, and paging signals are sequentially transmitted corresponding to the main group.

FIG. 5 is a flowchart showing an example of the operation of a radio base station, and FIG. 6 is a flowchart showing an example of the operation of a mobile station. In FIGS. 5 and 6, the control indicated by the alphabetic character A corresponds to claim 1. That is, first, the radio base station side detects the traffic amount of the calling signal or the location registration signal, determines the battery saving period corresponding to the traffic amount, and notifies the mobile device of the battery saving period through the downlink control channel. The mobile device receives the signal specifying the battery saving cycle and starts receiving the paging signal at the specified battery saving cycle.

[0012] Furthermore, the control indicated by the alphabetic character B in FIGS. 5 and 6 corresponds to claim 2. In the invention of claim 2, by setting the battery saving cycle of the mobile device by the user himself and notifying the wireless base station side, the amount of traffic of the location registration signal or calling signal on the wireless base station side increases. Even if the battery saving cycle is being controlled to shorten, the battery saving cycle may be lengthened to give priority to reducing the power consumption of the mobile device, or on the other hand, the aforementioned traffic may be decreasing and the battery saving cycle may be being controlled to be lengthened. Even in such cases, it is possible to reduce the connection delay time by shortening the battery saving cycle and giving priority to call processing.

For example, as shown in FIG.
Even if a mobile device belonging to a mobile device has a low traffic volume of location registration signals or calling signals and is under control to lengthen the battery saving cycle, the user of the mobile device selects to shorten the battery saving cycle and The connection delay time can be shortened by notifying the radio base station side through the uplink control channel, and when there is an incoming call signal, transmitting it also in the time slot of group 1H (corresponding to the main group).

Furthermore, as shown in FIG. 4, even if a mobile device belonging to group 1L has a large traffic volume of location registration signals or incoming call signals and is under control to shorten the battery saving period, the user of the mobile device selects a longer battery saving cycle, notifies the wireless base station of this on the uplink control channel, and when there is an incoming call signal, transmits only in the time slot of group 1L (subgroup compatible ), it is possible to reduce the power consumption of the mobile device. According to the present invention, it is possible to reflect the user's intentions in the service in this way.

[0015]

As explained above, according to the battery saving control method of the present invention, the call processing time per incoming call is not limited to the processing capacity at the time of average traffic.
This has the advantage that processing capacity can be dynamically set according to the amount of traffic. Further, according to the invention of claim 2, there is an advantage that it is possible to provide a service at a battery saving cycle that meets the user's wishes.

[Brief explanation of drawings]

FIG. 1 is a diagram showing the relationship between a battery saving cycle and unit time power consumption of a mobile device.

FIG. 2 is a diagram showing the relationship between the battery saving period and the processing time of call arrival control.

FIG. 3 is a diagram illustrating an embodiment of the battery saving control method of the present invention.

FIG. 4 is a diagram illustrating an embodiment of the battery saving control method of the present invention.

FIG. 5 is a flowchart showing an example of the operation of a wireless base station.

FIG. 6 is a flow chart showing an example of the operation of a mobile device.

FIG. 7 is a diagram showing an example of the configuration of a conventional mobile communication system.

FIG. 8 is a diagram showing an example of battery saving in a conventional mobile communication system.

[Explanation of symbols]

1 Public communication network 2-1 to 2-3 Exchange office 3-1 to 3-3 Wireless base station 4. Accumulation and recording device 5-1 to 5-3 Mobile device

Claims (2)

[Claims] Claim 1: A mobile communication system comprising at least one wireless base station and at least one mobile device connected to the wireless base station via a wireless line, wherein between the wireless base station and the mobile device, It has an uplink control channel from the mobile device to the wireless base station and a downlink control channel from the wireless base station to the mobile device, and the mobile device can move by intermittently receiving an incoming call signal from the wireless base station. In a battery saving control method for reducing the power consumption of a wireless base station, a mobile station under the control of a radio base station is transmitted to a mobile station via a downlink control channel depending on the traffic volume of the mobile station's location registration signal or calling signal included in the uplink control channel. A battery saving control method characterized in that a battery saving cycle of a mobile device is set by notifying a signal for controlling the battery saving cycle to a mobile device. 2. A mobile communication system comprising at least one wireless base station and at least one mobile device connected to the wireless base station via a wireless line, wherein between the wireless base station and the mobile device, It has an uplink control channel from the mobile device to the wireless base station and a downlink control channel from the wireless base station to the mobile device, and the mobile device can move by intermittently receiving an incoming call signal from the wireless base station. In a battery saving control method for reducing the power consumption of a mobile device, the mobile device notifies the wireless base station of the mobile device's battery saving cycle through the uplink control channel, and the base station performs a paging signal transmission operation based on this. A battery saving control method characterized by: