JPH0951304A - Radio communication system and power supply control method thereof - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce power consumption at a radio terminal in a radio communication system having the incoming/outgoing radio channels of a narrow band and the outgoing radio channel of a wide band. SOLUTION: When information transmitted to the radio terminal 301 exists in the buffer of a wide band radio base station 302, a signal instructing the turning-on of power source in the wide band reception means of the radio terminal is transmitted to the radio terminal from a narrow band radio base station 303. Thus, the radio terminal 301 turns off the power source of the wide band reception means until information addressed to its own station is inputted to the buffer of the wide band radio base station 302.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wireless communication system for transmitting and receiving information between a wireless terminal and a wireless base station, and more particularly to reducing power consumption of the wireless terminal. Specifically, in the wireless transmission path, SDL (Super) that enables faster downlink transmission than uplink transmission
high speed DownLink) The present invention relates to battery saving of a wireless terminal in a wireless communication system performing transmission.

[0002]

2. Description of the Related Art With the spread of small portable information processing and electronic devices, communication functions have been added to these portable devices, and services using various networks have been provided.

Generally, when providing a communication means for a small portable electronic device, in order to take advantage of the characteristics as a portable type, "anytime", "anywhere", "with anyone", and "whatever" It is desirable that the wireless communication system be capable of "easily" communicating and exchanging information.

To realize such a wireless communication system, a base station is connected to a communication network such as a public network or a digital network, and a bidirectional wireless communication channel is established between the base station and the wireless terminal. The base station sends information to the terminal using the downlink radio channel, the terminal sends information to the base station using the uplink radio channel, the communication network is provided with an information providing device such as a database,
You can access the database from the wireless terminal via the base station and receive the necessary information, and you can freely exchange calls and data with telephone terminals, facsimile terminals, computers, etc. connected to the communication network. It can be carried out or communicated with a wireless terminal via a base station, and this is becoming a reality by the mobile communication system.

Now that multimedia has come into practical use, various attempts have been made to widen the line in response to the demand for high-speed transmission of data with an extremely large amount of data such as image transmission. Has been.

However, in a wide band line, not only the transmitting side but also the receiving side consumes a large amount of hardware power. In particular, a wireless terminal, which is premised on being portable, has to decide how much power is required. It becomes a big problem. When considering multimedia, information such as voice, images, and data is handled, but it is natural for a wireless terminal to be on the side of use rather than the source of various information.

In other words, it is natural that the mobile terminal enables a two-way call service, but the user of the terminal receives voice, images and data as a multimedia service from a database or an information source. It is a form of service. This can be expected to have great potential demand as a service form.

[0008] For example, it is a great possibility to provide a service in a new field using a highly functional wireless terminal, such as watching a movie or subscribing to an electronic publication including a newspaper or a magazine.

To provide such a service, it is necessary to transmit a huge amount of data at a high speed, and a wideband high-speed wireless channel is required. However, this does not need to be bidirectional, and only to the base station side. Having it is enough. That is, a database configuration or an information supply source may be provided on the base station side, and a system configuration may be adopted in which information can be unilaterally transmitted from the base station side to the wireless terminal user in response to a request from the wireless terminal. A communication path from the terminal to the base station is also required, but if it is not necessary to send a large amount of information, it is possible to use a narrow band bidirectional wireless channel for the base station and the terminal. Is enough. By doing so, if the wireless terminal has only a receiving element as a wideband wireless channel, it does not need to have a transmitting system. Therefore, a transmitting / receiving system for a narrow band and a receiving system for a wideband are provided. A terminal can be realized with the configuration, and a wireless communication system capable of multimedia service with power saving and miniaturization of the terminal can be obtained.

The one developed under such a concept is SDL (Super high speed Dow).
nLink) communication system. In the SDL communication system (see Japanese Patent Application No. 6-137621), a wideband downlink radio channel (a radio channel for transmission from the base station side to the terminal side) and a narrowband bidirectional radio channel (uplink radio channel ( The uplink has a radio channel for transmission from the terminal side to the base station side) and the downlink radio channel), and the narrow band bidirectional radio channel is used for communication with a small amount of information such as voice and control information, and a wide band. The downlink wireless channel of is used for sending a large amount of information from the base station to the wireless terminal.

As described above, the wireless terminal uses only the receiving means for the wide band, and eliminates the wide band transmitting means which consumes a large amount of power to reduce the power consumption of the terminal.

[0012]

As described above, in order to realize a multimedia service, it is necessary to send a large amount of information at high speed, and in order to realize such a multimedia service in a wireless communication system. Requires wideband and fast wireless channels.

However, high speed transmission using a wide band requires a very large amount of power. Normally, a mobile device on the terminal side uses a storage battery as a power source, and therefore, if the power consumption increases, the terminal side always needs to perform a charging operation, resulting in poor usability. Although it may be possible to increase the battery capacity of the terminal, increasing the battery capacity not only costs more, but also causes the device to be larger and heavier and impairs portability. Occurs.

An SDL system has been proposed as a wireless communication system for solving such a problem. In the SDL system, the wideband transmission means of the wireless terminal is eliminated to reduce the power consumption of the terminal. However, although the power consumption is not as large as that of the wideband transmission means, the wideband reception means has a wideband reception means. Therefore, it is difficult to avoid unnecessary operation of the wideband reception means in order to realize power saving.

That is, the wide band receiving means consumes more power than the narrow band transmitting / receiving means, and therefore, it is desirable to eliminate the operation other than during reception from the viewpoint of power saving.

Therefore, an object of the present invention is to effectively turn on / off the power supply of the broadband receiving means of the wireless terminal, thereby making it possible to further reduce the power consumption of the portable device in the terminal. A wireless communication system and a power supply control method thereof are provided.

[0017]

[Means for Solving the Problems]

[Structure] In order to achieve the above object, the present invention is configured as follows. That is, a narrow band wireless base station having a narrow band transmitting / receiving means for information transmission, a wide band wireless base station having a wide band transmitting means for information transmission and a buffer for storing information to be transmitted, In a wireless communication system comprising a wireless terminal having a narrow band transmitting / receiving means for transmitting / receiving information to / from a band wireless base station and a wide band receiving means for receiving information from the wide band wireless base station, firstly, , A signal for instructing to turn on the power supply of the wideband receiving means of the wireless terminal is transmitted from the narrowband wireless base station to the wireless terminal when information to be transmitted to the wireless terminal exists in the buffer It is characterized in that it notifies.

Secondly, when there is no information to be transmitted to the wireless terminal in the buffer, a signal for instructing to turn off the wide band receiving means of the wireless terminal is sent to the narrow band wireless base station. Thirdly, it is transmitted from a station or the broadband wireless base station to notify the wireless terminal. Thirdly, a transmitting / receiving means for narrow band information transmission and a receiving means for wide band information transmission are provided. In a wireless communication system using a wireless terminal having a battery as a power source, the wireless terminal includes at least switch means for controlling on / off of power supply of receiving means for wideband information transmission, and wideband. When a signal instructing to turn off the power of the receiving means is received, the switch hand is turned on until a signal instructing to turn on the power of the broadband receiving means is received. Characterized by comprising a means for turning off control.

Fourthly, when the wireless terminal interprets that the power supply of its own station falls below a predetermined amount, the wireless terminal notifies the interpreted content by a human-recognizable expression method. To do.

Fifthly, when the wireless terminal interprets that the power supply of its own station has fallen below a predetermined amount, a signal indicating that it cannot receive information from the broadband wireless base station is transmitted to the narrowband wireless terminal. It is characterized by transmitting to a base station.

Sixth, in the wireless communication system for controlling the transmission of the wireless terminal, the wireless terminal which has determined not to perform the transmission is turned off for a predetermined time.

Seventh, in a wireless communication system having narrow band upper and lower wireless channels and a wide band downlink wireless channel, when a wireless terminal performs communication using a receiving means for wide band information transmission, It is characterized in that the narrow band receiving means of the terminal is controlled to be turned off.

Eighthly, in the case where the first wireless terminal having upper and lower narrow band wireless channels and the second wireless terminal having a wide band down wireless channel are connected and used, the first wireless terminal preliminarily uses the first wireless terminal. In the battery saving system, in which reception is performed for a certain period of time at each set period, and information from the narrowband wireless base station to the first wireless terminal is awaited and received, the period is changed.

[Operation] According to the first invention, the broadband wireless base station interprets that the information to be transmitted to the wireless terminal is stored in the buffer of the local station. A control signal for turning on the power supply of the wideband receiving means of the wireless terminal is transmitted using the downlink wireless channel to the wireless terminal (referred to as a narrowband downlink wireless channel). As a result, the wireless terminal can turn on the power supply of the broadband receiving means when the information addressed to itself is present in the buffer of the broadband wireless base station. In other words, according to the first invention,
The wireless terminal can turn off the power supply of the broadband receiving means until the information addressed to itself is stored in the buffer of the broadband wireless base station, and as a result, the power consumption of the wireless terminal can be suppressed. .

According to the second aspect of the invention, when the broadband wireless base station interprets that there is no information to be transmitted to the wireless terminal in its own buffer, the narrowband wireless base station sends the information to the wireless terminal. A downlink radio channel (called a narrowband downlink radio channel) or a downlink radio channel from a broadband radio base station to a radio terminal (called a broadband downlink radio channel) is used to power the broadband receiving means of the radio terminal. A control signal for turning off is transmitted. This allows
The wireless terminal can turn off the power supply of the broadband receiving means when the information addressed to itself is no longer in the buffer of the broadband wireless base station, and the power consumption of the wireless terminal can be suppressed.

Further, according to the third aspect of the invention, the wireless terminal is instructed to switch the power supply of at least the receiving means for wideband information transmission on and off, and to turn off the power supply of the wideband receiving means. When the signal for receiving the signal is received, there is a means for controlling the switch means to be turned off until the signal for instructing to turn on the power source of the wide band receiving means is provided, The broadband receiving means is powered off until a signal instructing to power on the broadband receiving means is received.

According to the fourth aspect of the invention, the wireless terminal checks the remaining battery level of its own station and displays the result in a representation method that can be recognized by humans. In particular, if there is not enough power to receive the information transmitted by the broadband downlink radio channel, it is clearly displayed so that the user can recognize it. This allows the user to know the remaining battery level of the wireless terminal and to recognize whether or not high-speed transmission using a wideband downlink wireless channel is possible, which makes it easier for the user to operate the wireless terminal. The property is improved.

According to the fifth aspect of the invention, the wireless terminal checks the battery level of its own station, and if there is not enough power to receive the information transmitted by the wide band downlink wireless channel, This is notified to the wideband wireless base station via the narrowband wireless base station. Accordingly, the broadband wireless base station can know that the wireless terminal cannot receive the information transmitted by the broadband downlink wireless channel, and thus can stop the transmission of information. As a result, it is possible to reduce inter-channel interference with other broadband wireless base stations and to suppress power consumption of the broadband wireless base station.

According to the sixth aspect of the invention, in the wireless communication system for controlling the transmission of the wireless terminal, the wireless terminal which has determined not to perform the transmission turns off the power for a predetermined time. Therefore, the wireless terminal can reduce power consumption.

According to the seventh invention, in a wireless communication system having upper and lower narrow band wireless channels and a wide band down wireless channel, when a wireless terminal performs communication using a receiving means for wide band information transmission. Controls to turn off the narrow band receiving means of the wireless terminal. Therefore, the wireless terminal can reduce power consumption.

According to the eighth invention, when the first wireless terminal having upper and lower wireless channels of a narrow band and the second wireless terminal having a wideband downlink wireless channel are connected and used, the first wireless terminal is used. In the battery saving method, in which the terminal receives for a certain period of time for each predetermined period and waits for and receives information from the narrowband wireless base station to the first wireless terminal, the period is changed. This cycle change is changed to a cycle longer than that under the condition that voice communication such as telephone is enabled under the condition that voice communication such as telephone is not performed.

Therefore, the wireless terminal can reduce power consumption.

[0033]

BEST MODE FOR CARRYING OUT THE INVENTION

[Configuration of Wireless Communication System] A specific example of the present invention will be described below with reference to the drawings.

First, the configuration of the wireless communication system required to implement the present invention will be described.

FIG. 1 is a conceptual diagram showing the configuration of a system according to the present invention, which is an example of the SDL system. In FIG. 1, 301 is a wireless terminal (wireless mobile station),
Reference numeral 302 is a wideband wireless base station, and 303 is a narrowband wireless base station. Further, 305 is a server (or database) for providing a predetermined service such as storing a huge amount of information and providing the information, and these broadband wireless base station 302, narrowband wireless base station 303, and server 305 are networks. It is connected via 306.

The wideband wireless base station 302 is a base station having a wireless transmitting means for a wideband wireless channel, and does not have a wideband receiving means. Since the broadband transmission is performed, the used frequency is a short wavelength and the service area is narrow.

Further, the narrow band wireless base station 303 is a base station having a wireless transmitting / receiving means by a narrow band wireless channel. Since the transmission is performed in a narrow band, the operating frequency having a relatively long wavelength can be used, so that the power consumption is wide and the service area can be wide.
The wireless terminal 301 includes a wideband wireless channel receiving unit and a narrowband wireless channel wireless transmitting / receiving unit, but does not include a wideband wireless channel transmitting unit.

Although not shown in FIG. 1, the broadband wireless base station 302 has a buffer for temporarily storing information to be transmitted. The wireless terminal 301, which is a wireless mobile station, is a terminal that receives information from the broadband wireless base station 302 and transmits / receives information to / from the narrowband wireless base station 303.

In FIG. 1, the wideband radio base station 302 and the narrowband radio base station 303 are distinguished from each other for the sake of convenience, but one radio base station has a transmitting / receiving means for transmitting narrowband information and wideband information. It may be configured to include both transmission means for transmission. In this case, although the cost of the wireless base station increases, the total number of wireless base stations in the entire system can be reduced. Further, when it is necessary to control between the transmission / reception means for narrow band information transmission and the transmission means for wide band information transmission, there is an advantage that the control becomes easy.

A specific example of the present invention will be described below using the configuration of FIG. 1 in which the wideband radio base station 302 and the narrowband radio base station 303 are different radio base stations. The wireless terminal 3
01 is a narrow band wireless base station 303 and a wide band wireless base station 30
The wireless terminal 301 and the narrowband wireless base station 303 can transmit and receive information, and are located in both service areas of the wireless terminal 301 and the wireless terminal 3 from the wideband wireless base station 302.
01 shall be able to receive the information.

A first embodiment of the present invention for battery saving intended for a wireless communication system having such a system configuration.
A specific example will be described.

(First Specific Example) FIG. 2 shows a block diagram of a configuration example of the wireless terminal 301. In FIG. 2, 301 is a wireless terminal of the present invention. 101 is a narrow band transmission / reception means, 1
Reference numeral 02 is a wideband receiving means, 103 is a control unit, 104 is a narrowband transmitting / receiving antenna, 105 is a wideband receiving antenna, and the wireless terminal 301 of the present invention is constituted by such components.

Of these, the narrow band transmission / reception means 101 demodulates a signal received from the narrow band transmission / reception antenna 104, modulates transmission information, and wirelessly transmits the narrow band radio wave from the narrow band transmission / reception antenna 104. Is what
The control unit 103 receives the information demodulated and output from the narrow band transmission / reception unit 101, analyzes the content, and if the analyzed content is the command content for turning off the power supply of the wide band reception unit 102, the wide band reception unit. The power of the wide band receiving means 102 is controlled to be turned off, and if the analysis result indicates that the power source of the wide band receiving means 102 is turned on, the power of the wide band receiving means 102 is turned on.

The wide band receiving means 102 demodulates a received signal of a wide band radio wave received from the antenna 105, and is configured to be turned off by the control of the control section 103.

The wireless terminal 301 of the present invention having such a configuration
The signal received from the narrow band transmission / reception antenna 104 is demodulated by the narrow band transmission / reception means 101 and sent to the control unit 103 to analyze the contents. And the analyzed content is
If the content of turning off the power supply of the broadband receiving means 102, the control unit 103 turns off the power supply of the broadband receiving means 102. Similarly, if the analysis result indicates that the power supply of the wideband receiving means 102 is turned on, the control unit 103 turns on the power supply of the wideband receiving means 102.

Therefore, the wireless terminal 301 having such a configuration
Can be automatically controlled to turn off the power source of the broadband receiving means 102 at the end of reception under the control of the base station side.

For example, when there is desired information from the server 305, the user of the wireless terminal 301 turns on the power supply of the wide band receiving means 102, and then the narrow band wireless base station 303.
Operate to send a signal to request the information you want.

As a result, in the wireless terminal 301, a signal for requesting the desired information is sent to the narrow band transmitting / receiving means 101, modulated by the narrow band transmitting / receiving means 101, and transmitted from the antenna 104 as a narrow band radio wave. This narrow band radio wave is received by the narrow band radio base station 303.

The narrow band wireless base station 303 transmits this information request signal to the server 305 through the network 307. The server 305 causes the wideband wireless base station 302 in the service area of the narrowband wireless base station 303 where the wireless terminal 301 is located to report information (called a base station ID) for identifying itself.

The wireless terminal 301 receives the notified base station ID of the broadband wireless base station 302, and interprets the broadband wireless base station 302 suitable for connection with itself from the signal strength and the like. Then, the interpreted result is transmitted to the server 305 via the narrow band wireless base station 303.

As a result, the server 305 becomes the wireless terminal 3
It is possible to know in which broadband wireless base station 302 the service area 01 is located. Further, in this way, the broadband wireless base station 302 does not have to constantly inform the base station ID, and the broadband terminal 102 may be powered on only when the wireless terminal 301 also wants to receive a service.

Therefore, the power consumption of both the wireless terminal 301 and the broadband wireless base station 302 can be suppressed. Further, since the broadband wireless base station 302 does not always notify the base station ID, it is possible to reduce inter-channel interference with other broadband wireless base stations 302.

The server 305, which has recognized that the wireless terminal 301 is located within the service area of the broadband wireless base station 302, transmits the information requested by the wireless terminal 301 to the broadband wireless base station 30 via the network 306.
Transmit to 2. The broadband wireless base station 302 is the server 3
The information sent from 05 is temporarily held in its own buffer, and then transmitted to the wireless terminal 301 using a wideband downlink wireless channel.

An ATM (Asynchronous Transfer Mode) or the like can be cited as a transmission method in the network 306. In ATM, information is discontinuously transmitted in cell units. Therefore, the input of information to the buffer of the broadband wireless base station 302 becomes intermittent, and there may be no information to be transmitted to the wireless terminal 301 in the buffer. Further, when the traffic on the network 306 is congested, the information transmission speed from the server 305 to the buffer becomes lower than the information transmission speed from the buffer to the wireless terminal 301, and as a result, the wireless terminal 301 is stored in the buffer. It happens that there is no information to send to.

The information stored in the buffer of the broadband wireless base station 302 is information addressed to a plurality of wireless terminals 301. Therefore, here, it means that there is no transmission information for a certain wireless terminal 301, and not all transmission information in the buffer is necessarily lost.

The wireless terminal 301, which has no information for its own station in the buffer, has no information to be sent even if the power supply of the wideband receiving means 102 is turned on, and is simply wasting power. is there.

Therefore, in the present invention, the broadband wireless base station 30
2 has a function of notifying the narrowband wireless base station 303 of information that the wireless terminal 301 has no more information to send in the buffer when there is no more information to send in the buffer. The narrowband wireless base station 303 has a function of wirelessly transmitting to the wireless terminal 301 an instruction signal for turning off the power supply of its own wideband receiving means when the notification is received.

Therefore, when there is no transmission information in the buffer, the narrow band wireless base station 3
03 (S1 to S3 in FIG. 3), the narrowband wireless base station 303 transmits an instruction signal for turning off the power supply of the wideband receiving means to the wireless terminal 301 using the narrowband downlink wireless channel. . The narrow band wireless base station 30
Alternatively, the configuration may be such that the wideband wireless base station 302 directly transmits a signal instructing to turn off the power of the wideband receiving means 102 of the wireless terminal 301 by using the wideband downlink wireless channel without going through step 3. It is possible. In this case, the procedure becomes S1, S2, S3a in FIG. 4, and S3 in FIG.
In contrast, as in S3a, the broadband wireless base station 302 directly transmits the instruction signal using a broadband downlink wireless channel.

An instruction signal for turning off the power source of the wideband receiving means is received by the antenna 104, and the narrowband transmitting / receiving means 101 is received.
To be input to the control unit 103.

The control unit 103 of the wireless terminal 301 which interprets the signal turns off the power supply of the wide band receiving means 102 (S4 and S5 of FIG. 3; the processing on the terminal side is not performed even when the procedure of FIG. 4 is performed. The same process is performed (see S4 and S5 in FIG. 4)).

After that, when interpreting that the information to be transmitted has entered into the buffer of the broadband wireless base station 302, the broadband wireless base station 302 notifies the narrowband wireless base station 303 of this (S11 of FIG. 5, S11, ~ S13). Upon receiving this, the narrowband wireless base station 303 receives the wireless terminal 30.
The signal for instructing to turn on the power supply of the wideband receiving means 102 of No. 1 is transmitted using the narrow band downlink wireless channel.

In the wireless terminal 301, this is set to the antenna 104.
And is sent to the narrow band transmission / reception means 101 for demodulation. Then, it is input to the control unit 103. The control unit 103 of the wireless terminal 301 that interprets the signal indicates that the wireless terminal 301
After knowing that the signal is an instruction to turn on the power supply of the broadband receiving means 102,
2 is turned on to be ready to receive the information sent from the broadband wireless base station 302 (S14, S in FIG. 5).
15).

As a result, the radio terminal 301 can turn off the power supply of the broadband receiving means 102 when there is no information to be transmitted to the radio terminal 301 in the buffer of the broadband radio base station 302. Unnecessary power consumption of 301 can be suppressed.

In the above example, the broadband wireless base station 30
If there is no more information to send in the 2nd buffer,
Although an example of immediately transmitting a signal instructing to turn off the power supply of the broadband receiving means 102 of the wireless terminal 301 has been shown, the information from the server 305 can be immediately transmitted from the server 305 by using some means. If it can be recognized that the data enters the buffer of 302, it is not always necessary to transmit a signal instructing to turn off the power supply of the wideband receiving means 102 of the wireless terminal 301.

Further, the broadband wireless base station 302 is provided with means for judging whether the power source of the broadband receiving means 102 of the wireless terminal 301 is on or off, and the power source of the broadband receiving means 102 of the wireless terminal 301 is powered on / off as follows. It can also be switched off.

For example, the broadband receiving means 10 of the wireless terminal 301 depends on whether or not the information to be transmitted in the buffer of the broadband wireless base station 302 exceeds a predetermined amount.
It may be possible to judge whether the power supply of No. 2 is turned on or off. In addition, when there is no information to be transmitted in the buffer of the broadband wireless base station 302 for a predetermined time or more, the wireless terminal 3
Alternatively, it may be determined that the power source of the broadband receiving unit 102 of 01 is turned off.

By doing so, the power consumption of the wireless terminal 301 can be suppressed and the amount of the signal for instructing the power supply of the wide band receiving means 102 to be turned on / off can be reduced.

In the above specific example, the wireless terminal 301 interprets the broadband wireless base station 302 that is suitable for connection with itself, and even after transmitting the interpreted result to the server 305,
The power supply of the broadband receiving means 102 was kept on. That is, even after the wireless terminal 301 registers its location,
The power supply of the broadband receiving means 102 was kept on.

However, the power supply of the broadband receiving means 102 may be turned off immediately after the position registration. In this case, the broadband wireless base station 302 receives the information to be transmitted in the buffer 304, and then the broadband receiving means 102 of the wireless terminal 301.
It sends a signal to turn on the power of. Thereby, the power consumption of the wireless terminal 301 can be further suppressed.

Further, in the above specific example, the broadband wireless base station 302 notifies the wireless terminal 301 of the signal for instructing the ON / OFF of the wireless terminal 301.
On the other hand, a signal indicating how much information to be transmitted is present in the buffer 304 or whether or not there is information to be transmitted may be notified. In this case, the control unit 103 of the wireless terminal 301 determines whether the power source of the wideband receiving unit 102 is turned on / off, and the wideband receiving unit 102 is also turned on.
It is possible to suppress the power consumption of the wireless terminal 301 by notifying the broadband wireless base station 302 of the on / off state of the power of the wireless terminal 301.

The operation sequence of the system according to the procedure of FIG. 3 is as shown in FIG. 7, the operation sequence of the system according to the procedure of FIG. 4 is as shown in FIG. 8, and the operation sequence of the system according to the procedure of FIG. 5 is shown. 9 and the operation sequence of the system according to the procedure of FIG. 6 is as shown in FIG. 7 and 8 are sequences relating to control for turning off the power, and FIGS. 9 and 10 are sequences relating to control for turning on the power.

In FIG. 7, information 90 sent from the server
0 is temporarily stored in a buffer at the base station for wideband,
This is transmitted via a wideband wireless channel, but if the information 900 sent from the server to the wideband base station is not in time and the wideband base station buffer becomes empty, the wideband base station will use the narrowband Signal 901 instructing to turn off the power supply of the broadband receiving means of the terminal. The narrow band base station transmits this to the terminal through the narrow band radio channel.

In the operation sequence shown in FIG. 8, the information 900 sent from the server is temporarily held in the buffer at the broadband base station and is transmitted by the broadband wireless channel. If the information 900 transmitted from the terminal is not in time and the buffer of the base station for wide band becomes empty, the base station for wide band does not become the base station for narrow band but directly receives the wide band receiving means of the terminal. A signal 901 instructing to turn off the power is sent. That is, the wideband base station directly transmits this instruction to the terminal through the wideband radio channel without passing through the narrowband base station.

In the operation sequence of FIG. 9, the information 9 from the server is stored in the buffer of the base station for the wide band which has become empty.
When 00 is transmitted, the wide band base station recognizes this and generates a signal 902 instructing to turn on the power source of the wide band receiving means of the terminal and sends it to the narrow band base station. The narrow band base station transmits this to the terminal through the narrow band radio channel. After that, the wide band base station transmits the information 900 from the server stored in its own buffer through the wide band radio channel.

In the operation sequence of FIG. 10, when the information 900 from the server is transmitted to the buffer of the base station for the wide band which has been emptied, the base station for the wide band recognizes this, and the base station for the wide band recognizes this. A signal 902 instructing to turn on the power of the receiving means is generated and sent to the narrow band base station. The narrow band base station transmits this to the terminal through the narrow band radio channel.

When this is received, the terminal side receives this, recognizes the instruction content, and turns on the power source of its own broadband receiving means. Then, on the terminal side, the narrowband transmitting / receiving means sends a response signal 903, and the narrowband base station which receives the response signal 903 sends the response signal 903 to the wideband base station. The wide band base station receives this, and thereafter the wide band base station transmits the information 900 from the server stored in its own buffer on the wide band radio channel.

In this specific example, as shown in FIGS. 7 to 10, when the transmission information 900 addressed to a certain terminal is emptied in the middle because the transmission from the server is not in time, that is, the broadband base station. There are two cases in which when the transmission information 900 addressed to a certain terminal is lost in the buffer of the station, the power supply of the wideband receiving means of the certain terminal is turned off.
When the transmission information 900 destined for a certain terminal arrives from the server and can be transmitted again, that is, the transmission information 90 destined for a certain terminal is stored in the buffer of the broadband base station.
Two types of cases in which the power supply of the wideband receiving means of the certain terminal is turned on and the reception is restarted when 0 arrives are shown as variations of the operation control.

By the way, as shown in FIGS. 5 and 9, after the broadband base station transmits a power-on instruction signal, a control operation for restarting information transmission without confirmation of power-on from the terminal is performed. In this case, although the control for restarting the transmission is extremely simple, the broadband wireless base station does not operate even if the power of the broadband receiving means of the wireless terminal is off because the broadband wireless base station starts the one-way control operation. Nevertheless, information may be transmitted. In this case, even if the information is transmitted, since there is no ACK (response) signal from the wireless terminal, the information has to be transmitted again, resulting in unnecessary transmission, resulting in an increase in traffic on the wireless channel. I will end up.

On the other hand, as shown in FIGS. 6 and 10, the wireless terminal 3
After 01 turns on the power supply of the broadband receiving means of its own station (see S15 in FIG. 6), it takes steps to notify the broadband wireless base station that the power supply of the broadband receiving means is turned on. Although the control is complicated (see S16 in FIG. 6), the broadband wireless base station can transmit information after recognizing that the wireless terminal has turned on the power of the broadband receiving means. Therefore, useless information transmission can be eliminated. Therefore, traffic can be reduced because there is no useless information transmission.

If the broadband wireless base station is provided with means for storing whether the power source of the broadband receiving means of the wireless terminal is on or off, the broadband wireless base station manages information transmission control. Easy to peel off.

Here, FIG. 11 is a block diagram showing an example of the configuration of the wireless terminal 301 which enables ON / OFF control of the power source of the broadband receiving means. In the figure, 101 is a narrow band transmission / reception means, and 103 is a control unit. Also, BT
Is a battery as a power source of the terminal, and the battery BT allows the narrow band transmission / reception means 101, the control unit 103,
And the broadband receiving means operates by receiving power supply.

The wide band receiving means is composed of the following elements. That is, the filters 910 and 912, the down converter 911, the demodulator 913, and the codec 91.
4, power on / off switches SW0 to SW4.

Of these, the filter 910 is for removing noise, and is for removing noise in the wideband received signal received by the antenna and extracting the signal. The down converter 911 is for converting the carrier frequency from a high frequency to a low frequency, and is for converting the received signal obtained through the filter 910 into a low frequency signal.

The filter 912 is the down converter 9
A channel selection filter for selecting a reception signal whose frequency is converted through 11 and for reducing interference from an adjacent channel. The demodulator 913 is for demodulating the reception signal obtained through the filter 912, and the codec 914 is for decoding the reception signal demodulated by the demodulator 913.

In this wireless terminal, the down converter 911, the demodulator 913, the codec 914, and the filter 912 respectively correspond to the corresponding power source on / off switch S.
This is a mechanism for receiving power from the battery BT via W1 to SW4 and operating. In order to automatically control the power supply, the power-on / off switches SW1 to SW4 are configured to be opened / closed by a control signal of the control unit 103, and the control unit 103 sends a power-off instruction signal via the narrow band transmission / reception unit 101. , Or interpret it when received via the codec 914, and turn on / off the power switch SW.
1 to SW4 are off-controlled, and when a power-on instruction signal is received via the codec 914, it is interpreted to control the power-on / off switches SW0 to SW4 to be on-controlled.

With such a configuration, when the wireless terminal user wants to receive information from the server or the like, the request is sent to the base station side through the narrow band transmission / reception means 101.
When the operation is performed, the control unit 103 takes a control mode of keeping the power-on / off switches SW0 to SW4 off.

Then, the base station side receiving this request controls to fetch the information from the server, and when the information is sent from the server, the broadband base station temporarily holds it in its own buffer. Then, the broadband base station controls to transmit a power-on instruction signal. as a result,
A power-on instruction signal is sent from the narrowband base station, and this signal is decoded and given to the control unit 103. The control unit 103 interprets this signal and the power-on / off switches SW0 to SW0.
Control to turn on SW4.

As a result, the power on / off switches SW0 to SW0
SW4 is turned on, and the down converter 911, the demodulator 913, the codec 914, and the filter 912 receive power from the battery BT via the corresponding power on / off switches SW0 to SW4, and start operating.

The wideband base station transmits the information once held in its own buffer through the wideband wireless channel. On the terminal side, this is down-converted, the received signal is selected by the filter 912, demodulated by the demodulator 913, and decoded by the codec 914 to obtain information.

When there is no information to be transmitted in its buffer, the broadband base station outputs a power-off command signal,
This signal is transmitted from a narrow band base station or a wide band base station.

Since this signal is received by the terminal side, decoded and given to the control unit 103, the control unit 103 interprets this signal and controls the power on / off switches SW0 to SW4 to be turned off.

As a result, the power on / off switches SW0 to SW0
SW4 is turned off, and the down converter 911, the demodulator 913, the codec 914, and the filter 912 stop their operations because the corresponding power supply on / off switches SW0 to SW4 are opened and the power supply from the battery BT is lost. As a result, the broadband receiving means is stopped and power consumption is eliminated. Since the narrow band transmission / reception means 101 is continuously supplied with power from the battery BT,
The power-on / off switches SW0 to SW4, which receive the power-on command from the base station to the narrowband transmitting / receiving means 101, are turned on, and the receiving operation by the wideband receiving means is started.

In this way, the broadband receiving means is configured so that the power is turned off when there is no information to be transmitted from the transmitting side, and power saving can be achieved.

Further, the filter 910 used in the present invention,
912 is an active filter that requires a power source,
Of course, a passive filter that does not require a power source may be used.

Further, according to the present invention, the control means provided in the base station performs the functional configuration for monitoring the status of the transmission information on the base station side, generating a power-on command, and giving it to the narrow band base station. However, in addition to the configuration in which the base station has such a function, a control station for controlling the broadband base station or the narrow band base station is provided and the base station is managed and controlled by this control station. You can also This example is shown in FIG.

In FIG. 12, A1 is a broadband base station, A2 is its service area, A6 is a narrow band base station, A7 is its service area, and A3 is a control station for the broadband base station, within the service area A7. Manages and controls all broadband base stations A1. A8 is a control station for controlling the narrow band base station A6 which is in charge of the service area A7, and the control station A8 and the control station A3 are linked.

With such a configuration, it becomes easy for the control station A8 and the control station A3 to perform cooperative control for the wireless terminals in the service area A7 and perform unified management. That is, the control station A3 manages the broadband base station A1, executes control corresponding to the situation, gives commands and information to the control station A8 as necessary, and sends a command to the wireless terminal via the narrow band base station A6. Send a command,
In addition, the control station A8 obtains information about the wireless terminal including power supply information and various requests, and the control station A3 sends a command to the wireless terminal via the narrowband base station A6 or a command via the wideband base station A1. You will be able to easily send information and information.

Although the present invention has been described by taking the SDL communication system using the wide band wireless channel and the narrow band wireless channel as an example, only the two-way communication using the wide band wireless channel or the narrow band wireless channel is used. It can be applied to a power-saving configuration of a provided wireless terminal. An example thereof will be described with reference to FIG.

In the figure, 103 is a control unit. Further, BT is a battery as a power source of the terminal, and the battery BT causes the control unit 103, the transmitting means and the receiving means to operate by receiving power supply. SW0 to SW7 are power on / off switches.

Reference numeral 910 is a filter for removing noise. 911 is a down converter for converting the carrier frequency from a high frequency to a low frequency. Reference numeral 912 is a channel selection filter for reducing interference from adjacent channels. These 910 to 912 form a reception system.

A modulator / demodulator 915 demodulates a received signal and modulates a transmitted signal. Numeral 914 is a codec, which encodes the transmission signal and supplies it to the modulator / demodulator 915, and decodes the received signal demodulated and output from the modulator / demodulator 915.

Reference numeral 916 is a filter for waveform shaping. An up converter 917 converts the carrier frequency from a low frequency to a high frequency.
916, 917 and 919 form a transmission system. A duplexer 918 has a transmission method of FDD (Freq).
This is essential in the case of the U.S.A. Division Duplex) and prevents a transmission signal from interfering with a reception signal and, conversely, a reception signal from interfering with a transmission signal.
Transmission method is TDD (Time Division Dup)
In the case of ulex), use a switch instead of a duplexer. The switch prevents the transmitted signal and the received signal from colliding with each other in time. Again, there may be no codec 914.

Reference numeral 919 denotes a timer, which gives time information to the control unit 103.

In this wireless terminal, the filter 910,
912, 916, 919, down converter 911,
The modulator / demodulator 915, the codec 914, and the up converter 917 correspond to the power-on / off switch S corresponding to each.
It is a mechanism that receives power from the battery BT via W0 to SW7 and operates.

Here again, the filters 910, 912, 9
16 and 919 are described by taking an active filter that requires a power source as an example, but a passive filter that does not require a power source may of course be used.

In order to automatically control the power supply, the power on / off switches SW0 to SW7 control the opening / closing of the switches.
Control signal from the control unit 10
3 receives the power-off instruction signal via the codec 914 and interprets it to turn on / off the power switches SW0 to SW0.
The power is supplied after turning off the SW7, and then the power on / off switches SW1, SW3 are turned on by the timer 919.
The SW5 is ON-controlled periodically or aperiodically, the power-ON command from the base station is monitored, and if there is a power-ON command from the base station, the power-ON / OFF switches SW1 and SW
3, SW5 is turned off, and power on / off switches SW0, S
W2 and SW4 are turned on to put the transmission system into an operating state, and a response signal is sent to the base station. Then, the power on / off switches SW0, SW2 and SW4 are turned off to turn off the transmission system, and the power on / off switch SW1, SW3, SW5
Is turned on to enable the receiving system to operate.

In this configuration, the modulator / demodulator 91 is in use.
5. When the power of the codec 914 is turned on and a reception request is made, the filters 910 and 912 which are reception systems are turned on, and the up converter 917 and the filter 916 which are transmission systems are turned off and transmission is performed. At this time, the transmission system is powered on and the reception system is powered off.

When the control unit 103 receives a power-off instruction signal from the base station via the codec 914, the control unit 103 interprets it and controls the power-on / off switches SW1 to SW7 to turn off. , Or power supply ON / OFF switches SW1, SW irregularly
3, SW5 to SW7 are on / off controlled to wait for a power-on command from the base station.

Power on / off switches SW1, SW3, S
If a power-on command from the base station is received during the period when W5 to SW7 are on-controlled, the power-on / off switch SW
1, SW3, SW5 off, power on / off switch S
W0, SW2, SW4 are turned on to put the transmission system into an operating state, and a response signal is sent to the base station. Then, the power on / off switches SW0, SW2, and SW4 are turned off to turn off the transmission system, and the power on / off switch. SW1, SW
3, SW5 is turned on to enable the reception system and receive the reception signal.

In the above first embodiment, in order to save power in the wide band receiving means, when there is no information to be transmitted from the transmitting side through the wide band radio channel, the wide band receiving means is turned off. The example in which the power saving can be achieved has been described. Also, in a configuration that has only one transmission / reception system, when a power off command is received, the wireless terminal is turned off, only the timer is activated, and the reception system is turned on at regular or non-periodical intervals. The power consumption was reduced by making it possible to monitor the command of.

Further, if the base station is equipped with some means so that the next transmission time can be predicted, the power-off command is sent and the power-off time is instructed. As a result, the wireless terminal can turn on the reception system without waste, so that effective power saving can be achieved.

Next, check the remaining battery level,
If the configuration is such that it can be notified whether or not reception by the wide band wireless channel is possible, the usability will be further improved. This example will be described as a second specific example.

(Second Specific Example) In this example, the wireless terminal 3
01 is configured to check the remaining battery level of its own station and display the result on a display DSP provided in the wireless terminal 301 by an expression method that can be recognized by humans. There are roughly two display methods as shown in FIG.

As a first method, there is a method of displaying the remaining amount of the battery in stages, an example of which is shown in FIG. In this example, the remaining battery level is fully charged,
Divided into 4 stages: half remaining, low remaining, battery exhausted,
Each can be displayed as a symbol.

The structure for that purpose may be as shown in FIG. In FIG. 15, 104 is a transmitting / receiving antenna for narrow band, 105 is a receiving antenna for wide band, and 1
01 is a narrow band transmission / reception means, 102 is a wide band reception means, 1
Reference numeral 03 is a control unit, and BT is a battery. The narrow band transmission / reception unit 101, the wide band reception unit 102, and the control unit 103 operate with the battery BT as a power source. Broadband receiving means 102
Is supplied with power from the battery BT through a switch SW which is controlled to open and close by the control unit 103.

The battery remaining amount detecting device BD detects the remaining amount of the battery BT, and when the detection result is V, the control unit 103 determines the battery remaining amount display method according to the condition shown in FIG. . The battery remaining amount display device DSP displays the determination result of the control unit 103.

As a result, the symbol I indicating the state of the capacity is displayed on the battery remaining amount display device DSP according to the remaining amount of the battery BT, and the user can recognize the power state at a glance.

Further, for example, when a speaker is provided and the control unit 103 is provided with an alarm notification control function, when the remaining amount of the battery BT becomes considerably low, a warning sound is output from the speaker or a screen display is made. It may be configured to prompt the user to charge or replace the storage battery by using the above.

The second method is whether or not transmission / reception with the narrow band wireless base station 303 is possible and whether or not information can be received from the wide band wireless base station 302 according to the remaining battery level. There is a way to display. An example is shown in FIG. Here, it is divided into low-speed transmission (communication by narrow-band wireless channel) and high-speed transmission (communication by wide-band wireless channel), and if communication is possible, display with "O", and if not possible, display with "X" mark. I chose

The functions required for this are shown in FIG. Basically, the configuration is the same as that shown in FIG. 15, and a display device D for displaying communication enabled / disabled instead of the previous symbol display
SP is provided. However, it is divided into low speed transmission (communication by narrow band wireless channel) and high speed transmission (communication by wide band wireless channel), and if communication is possible from the battery remaining amount detected by the battery remaining amount detecting device BD, "O", If possible, it is necessary to control the display so as to be indicated by "x". Therefore, the control unit 103 controls the detected battery level V, the threshold voltage V0 of the voltage that enables high-speed transmission, and the voltage of the voltage that enables low-speed transmission. Compared with the threshold level V1, in light of the conditions as shown in FIG. 18, it is judged whether it is possible or not. If possible, control is performed by displaying "O", and if not, "x" mark is displayed. Configured.

If the battery level is low,
How long it can receive information from the broadband wireless base station 302, or the narrowband wireless base station 3
It is also possible to display how much time can be transmitted / received to / from 03. Also, server 3
05 has a means for checking the time required to transmit the requested information and transmitting it to the wireless terminal 301, so that the wireless terminal 301 makes a request according to the remaining battery level of its own station. It is also possible to display whether or not all the information can be received.

By the above, the user can know the remaining amount of the battery and what kind of service can be received for how long, so that the comfort of operating the wireless terminal 301 can be improved. Can be improved.

(Third Specific Example) An example in which the base station side is notified of the battery residual amount detection result of the wireless terminal 301 and unnecessary transmission is prevented will be described below.

The wireless terminal 301 checks the remaining battery level of its own station and determines whether or not there is sufficient power to receive the information transmitted by the wide band downlink wireless channel.
If there is not enough power to receive the information transmitted by the wideband downlink radio channel, the fact is notified to the narrowband radio base station 303 using the narrowband uplink radio channel.

The narrow band radio base station 303 is the network 3
The information is transmitted to the server 305 or the broadband wireless base station 302 via 06. If you tell the server 305,
The server 305 stops transmission of information to the broadband wireless base station 302, and
A signal instructing to stop transmitting information to the wireless terminal 301 is sent. The broadband wireless base station 302 is the wireless terminal 30.
Stop sending information to 1.

When the broadband wireless base station 302 is notified, a signal for requesting the server 305 to stop transmitting information to the wireless terminal 301 and to stop transmitting information to itself is also sent. send. The server 305 stops transmitting information to the broadband wireless base station 302.

As a result, wasteful transmission from the broadband wireless base station 302 to the wireless terminal 301 is eliminated, so that it is possible to reduce inter-channel interference with other broadband wireless base stations 302 and to consume the broadband wireless base station 302. It is possible to reduce power consumption. In addition, the broadband wireless base station 30
It is possible to suppress unnecessary signal exchange between the server 2 and the server 305, and it is possible to use the network 306 efficiently.

(Fourth Specific Example) Next, an example of performing battery saving in the CSMA system will be described. Conventionally, in CSMA, the power of the wireless terminal 401 is turned on even when packet transmission is not performed, and wasteful power is consumed. In the following example, a battery saving method in such a case will be described.

First, the configuration of the wireless communication system targeted by the present invention will be described. FIG. 19 is a conceptual diagram showing the configuration of the system according to the present invention. In FIG. 19, reference numeral 401 is a wireless terminal, 402 is a wireless base station, and a plurality of wireless base stations 402 are connected via a network 403. The wireless terminal 401 is a terminal that transmits and receives information to and from the wireless base station 402, and includes a timer having a function of turning on the power of the terminal after a set time has elapsed when activated.

In the following, the transmission method from the wireless terminal 401 to the wireless base station 402 will be described as CSMA (Carier Sense Multipl).
An example will be described using an example of an e Access) method. Here, CSMA is to check the presence / absence of a packet being transmitted before the wireless terminal 401 performs packet transmission, and if there is no packet being transmitted, perform packet transmission, and if there is a packet being transmitted, transmit packet. It is a transmission method in which a packet is transmitted after a predetermined time has elapsed without performing the packet transmission. However, in the conventional CSMA, the power of the wireless terminal 401 is on even while packet transmission is not performed, and wasteful power is consumed.

Therefore, according to the present invention, when it is determined that packet transmission is not performed, only the timer is activated, and the power of the terminal is turned off so that there is no other power consumption. Then, after a lapse of a predetermined time, the timer is timed up to turn on the power supply, the presence / absence of a packet being transmitted is checked again, and it is determined whether or not to perform packet transmission. The wireless terminal 401 determines how long the power is off and sets the time when the timer is activated.

By doing so, the wireless terminal 40
1 makes it possible to prevent unnecessary power consumption. Also,
In the above specific example, an example in which the wireless terminal 401 determines whether or not to perform packet transmission has been described, but the present invention is also applicable to a system in which the wireless base station 402 controls packet transmission of the wireless terminal 401. It is possible to apply.

In this case, the radio base station 402 is the radio terminal 4
No. 01 transmission control means and means for notifying the transmission control signal determined by the transmission control means.

Radio terminal 401 interprets the transmission control signal notified from radio base station 402 and determines whether or not to perform transmission. The wireless terminal 401 that does not perform transmission turns off the power, turns on the power after a predetermined time has elapsed, interprets the transmission control signal notified from the wireless base station 402 again, and determines whether to perform transmission. Do.

[0135] Further, regarding the time when the power is turned off, the method by which the radio terminal 401 judges and the radio base station 40
2 makes a judgment and informs the wireless terminal 401. Although the latter increases the load on the wireless base station 402, the wireless terminal 4
01 is more effective in reducing the power consumption of the wireless terminal 401 because the time when the power source of 01 is turned off can be determined more appropriately.

(Fifth Specific Example) In a communication system such as SDL, when there is no information to be transmitted from the transmitting side through a wideband radio channel in order to save power in the wideband receiving means, the wideband receiving means is used. In the first specific example, the power supply is turned off to save power. However, this is a case where a communication terminal having a narrow band transmission / reception means and a wide band reception means is targeted, and it is necessary to use a transmission / reception integrated type narrow band transmission / reception means for transmission. As a result, there is a tendency that battery saving for narrow band systems cannot be performed sufficiently.

Therefore, a system capable of sufficiently performing battery saving not only for a wide band system but also for a narrow band system will be described below as a fifth specific example. In this example, a narrow band system is divided into transmitting means and receiving means, and a battery control means for controlling power supply according to the state is provided so that the wireless terminal uses the receiving means for wide band. When the communication is performed, the power supply of the narrow band receiving means of the wireless terminal is controlled to be turned off.

That is, the fifth specific example is a wireless communication system having narrow band upper and lower (uplink / downlink) wireless channels and a wideband downlink wireless channel, in which a wireless terminal receives data for wideband information transmission. When performing communication using the means, control is performed to turn off the power supply of the narrow band receiving means of the wireless terminal.

Further, in order to save the battery for the wide band system, the battery control means does not turn on the wide band receiving means until the wireless base station side (network side) receives a power-on command. .

FIG. 20 shows a configuration example of the wireless terminal 1000 according to the fifth specific example. 1000 is a wireless terminal of the present invention. Reference numeral 1001 is a narrow band transmitting / receiving antenna, 1002 is a wide band receiving antenna, 1003 is a control unit, 1004 is a battery control unit, 1005 is a narrow band receiving means, 100
Reference numeral 6 is a wideband receiving means, 1007 is a narrowband transmitting means, and the wireless terminal 1000 of the present invention is constituted by such components.

Of these, the narrow band receiving means 1005 demodulates the signal received from the narrow band transmitting / receiving antenna 1001, and the narrow band transmitting means 1007 modulates the transmission information to narrow band from the narrow band transmitting / receiving antenna 1001. The control unit 1003 receives the information demodulated and output from the narrow band receiving unit 1005, analyzes the content, and performs corresponding control processing in response to a command. is there.

The battery controller 1004 is the controller 10
03, narrow band receiving means 1005 and narrow band transmitting means 1
This is for controlling the supply of battery power to 007. The battery control unit 1004 does not turn on the power switch of the wireless terminal 1000, and at the same time, the battery control unit 1004 does not supply the battery to the broadband receiving unit 1006. In response to this instruction, it has a function of controlling to supply the battery to the broadband receiving means 1006. This is because the wide band receiving means 1006 consumes more power than the narrow band transmitting / receiving means, and thus wasteful power consumption of the wide band receiving means 1006 can be suppressed.

The broadband receiving means 1006 demodulates the signal received from the broadband receiving antenna 1002, and the control section 1003 receives the information demodulated and output from the broadband receiving means 1006 and analyzes the content.

The wireless terminal 100 of the present invention having such a configuration
When the user turns on the power switch to 0, the battery control unit 1004 supplies power from the battery to the control unit 1003, the narrow band receiving unit 1005, and the narrow band transmitting unit 1007, and the control from the control unit 1003 is performed. Then, the narrowband transmission means 1007 issues a location registration request, and location registration is performed on the network side.
Then, as a result, it becomes possible to receive a communication service with the network side.

Regarding the supply of the battery to the broadband receiving means 1006, there are cases where the battery is supplied and cases where the battery is not supplied.

At the same time when the power switch of the wireless terminal 1000 is turned on, it is better to immediately supply the battery to the broadband receiving means 1006 in a system which provides a service using the broadband receiving means 1006.

However, if not, the wireless terminal 10
It is preferable that the battery control unit 1004 does not supply the battery to the broadband receiving means 1006 at the same time when the power switch of 00 is turned on. This is because the power consumption of the wideband receiving means 1006 is larger than that of the narrowband transmitting / receiving means, and it is desired to suppress the wasteful power consumption of the wideband receiving means 1006.

That is, it is preferable for the power saving of the wireless terminal 1000 not to supply the power from the battery until the communication using the broadband receiving means 1006 is performed. The present invention will be described below in the case of using the latter method.

The wireless terminal 1000 uses the wideband receiving means 10 when performing communication using a wideband downlink channel.
A battery is supplied to 06 and a signal for requesting desired information is transmitted to the narrow band wireless base station 303.

The narrow band wireless base station 303 transmits this information request signal to the server 305 through the network 306. The server 305 causes all the broadband wireless base stations 302 within the service area of the narrowband wireless base station 303 where the wireless terminal 1000 is located to report information (called a base station ID) for identifying itself.

Further, as another procedure, the wireless terminal 1000
Does not supply a battery to the wide band receiving means 1006, but first transmits a signal for requesting desired information to the narrow band wireless base station 303. Narrowband wireless base station 303
Transmits this information request signal to the server 305 through the network 306.

The server 305 causes all the broadband wireless base stations 302 in the service area of the narrowband wireless base station 303 where the wireless terminal 1000 is located to report the base station ID, and also causes the wireless terminal 1000 to perform the narrowband wireless communication. Through the base station 303, turn on the power supply of the broadband receiving means 1006.
Instruct to do N. Alternatively, the broadband wireless base station 3
02, the server 305 sends the broadband receiving means 10 via the narrow band wireless base station 303.
It is instructed to turn on the power supply of 06.

Receiving this, the wireless terminal 1000 controls the battery control unit 1004, and the wide band receiving means 1006.
Supply the battery to. Then, the broadband receiving means 10
The server 305 is notified via the narrowband wireless base station 303 that the power source of the power source 06 has been turned on. In the server 305, the wireless terminal 1000 turns on the power supply of the broadband receiving means 1006.
After confirming that, the base station ID of the broadband wireless base station 302 is reported.

21 to 23 show operation sequence diagrams for notifying the base station ID explained here. FIG. 21 shows a signal 200 for requesting information after the battery is supplied to the broadband receiving means 1006.
FIG. 9 is an operation sequence diagram when 0 is transmitted to the narrowband wireless base station 303.

That is, in FIG. 21, when there is desired information from the server, the user of the wireless terminal transmits a signal 2000 requesting information from the terminal side to the narrow band wireless base station on the network side, Then, this signal 2000 is passed to the server, and the server sends a signal 2001 instructing the notification of the base station ID to the broadband wireless base station on the network side, and the broadband wireless base station receiving this signal indicates the ID of the base station. The signal 2002 is sent to the communication terminal that has made the above transmission request via the base station. In this example, two broadband wireless base stations A and B respectively send a signal 2001 to the terminal because this is because the broadband wireless base station has a narrow service area. By sending a signal 2001 from each of the two wideband wireless base stations A and B, which are targeted for service to a part of the service area of the wireless terminal, to increase the probability that the wireless terminal can receive this signal. There is. Signal 20 indicating the ID of the base station
When 02 is received, the base station ID is used to enable communication via the base station.

22 and 23 are operation sequence diagrams in the case where the signal 2000 for requesting information is transmitted to the narrow band wireless base station 303 without supplying the battery to the wide band receiving means 1006. is there. However, FIG.
23, the wireless terminal 1000 reports the base station ID of the broadband wireless base station 302 without confirming that the wireless terminal 1000 has supplied the battery to the broadband receiving means 1006, while the operation sequence of FIG. However, the difference is that the wireless terminal 1000 notifies the base station ID of the broadband wireless base station 302 after confirming that the battery has been supplied to the broadband receiving means 1006.

That is, in FIG. 22, when there is desired information from the server, the user of the wireless terminal transmits a signal 2000 requesting information from the terminal side to the narrow band wireless base station on the network side, and the network side This signal 2000 is passed to the server, the server sends a signal 2001 instructing the notification of the base station ID to the broadband wireless base station on the network side, and the broadband wireless base station receiving this signal further shows a signal indicating the ID of the base station. 2002 is sent to the communication terminal that has made the above-mentioned transmission request via the base station.

In this example, the server gives the narrowband wireless base station a signal 2003 for instructing to turn on the power supply of the wideband receiving means 1006, and the narrowband wireless base station receives the signal 2003. , And transmits the signal 2003 to the communication terminal side by narrow band radio. On the side of the communication terminal, receiving the signal 2003 instructing to turn on the power supply of the wideband receiving means 1006 and turning on the power supply of the wideband receiving means 1006 enables information reception using wideband radio waves.

After the transmission of this signal 2003, a signal 20 is sent from the two broadband wireless base stations A and B to the respective terminals.
Send 01.

In this example, the communication terminal turns off the wideband receiving means until communication using wideband radio waves is required to save power, and sends a power-on command to the wideband receiving means to send an information transmission service. In addition to sending from the network side, the power-on instruction is sent using a narrow band wireless base station with a wide service area, and then the two wide band wireless base stations A and B are respectively sent to the communication terminal. A signal 2001 for notifying the base station ID is sent,
This is because the service area of the broadband wireless base station is narrow. From the two broadband wireless base stations A and B, which are targeted for service in a part of the service area of the narrow band wireless base station whose location is registered by the wireless terminal. By transmitting the signal 2001 to each of the terminals, the probability that the wireless terminal can receive this signal is increased, which is the same as the case of FIG. Then, a signal 20 indicating the ID of the base station
When 02 is received, the base station ID is used to enable communication via the base station.

In the example of FIG. 22, when there is desired information from the server, the user of the wireless terminal sends a signal 2000 requesting information from the terminal side to the narrow band wireless base station on the network side, This signal 20
00 to the server, and before sending the signal 2001 instructing the notification of the base station ID, the server first instructs the narrowband wireless base station to turn on the power supply of the wideband receiving means 1006. The signal 2003 is given.

Upon receipt of this, the narrow band wireless base station transmits the signal 2003 to the wireless terminal side by narrow band wireless.
On the wireless terminal side, by receiving the signal 2003 instructing to turn on the power supply of the wide band receiving means 1006 and turning on the power supply of the wide band receiving means 1006, it becomes possible to receive information using wide band radio waves.

When the power supply of the wireless terminal side wide band receiving means 1006 is turned on, a signal 2004 indicating this is sent to the narrow band wireless base station by the narrow band wireless, and the narrow band wireless base station sends this to the server.

Upon receiving the signal 2004, the server next sends a signal 2001 for instructing the notification of the base station ID to the two wide band wireless base stations A and B, and from the wide band wireless base station which receives the signal 2001, the base station. A signal 2002 indicating the ID is sent to the wireless terminal that has made the above-mentioned transmission request via the base station.

In this example, the wireless terminal turns off the wide band receiving means until communication using wide band radio waves is necessary to save power, and sends a command to turn on the wide band receiving means to transmit information. After making sure that the power is turned on from the side of the network that provides the service, the narrow-band radio base station having a wide service area is used to send the power-on instruction, and after confirming that the power of the wideband receiving means is turned on, A, A signal 2001 for notifying the base station ID is sent from each of the two broadband wireless base stations B to the corresponding wireless terminal. Then, when the signal 2002 indicating the ID of the base station is received, the base station ID is used to enable communication via the base station.

The method for notifying the base station ID described here is not limited to the present invention, and can be applied to all systems having narrow band upper and lower radio channels and wide band downlink radio channels. is there.

The wireless terminal 1000 transmits the signal 200 according to the above procedure.
The base station ID notified by 2 is received from the wide band receiving antenna 1002 and demodulated by the wide band receiving means 1006. The demodulated signal is sent to the control unit 1003, and the control unit 1003 allows the broadband wireless base station 3 suitable for connection with its own station.
02 is interpreted. The interpreted result is the narrow band transmission means 1
007 and is transmitted to the server 305 via the narrow band wireless base station 303.

As a result, the server 305 can recognize in which broadband wireless base station 302 the service area of the wireless terminal 1000 is located, so that communication using the broadband downlink channel becomes possible.

By the way, the wireless terminal 1000 performs location registration with respect to the broadband wireless base station 302, while controlling the battery control unit 1004 to stop the power supply from the battery to the narrow band receiving means 1005, and the narrow band downlink is performed. Stop channel communication. That is, the wireless terminal 1000 uses the narrowband transmission means 1007 and the wideband reception means 1006 to perform communication using the narrowband upstream channel and the wideband downstream channel.

In the system to which the present invention is applied, it is impossible to perform communication using both narrowband and wideband downlink channels, but when performing communication using only wideband downlink channels In addition, since battery power is not supplied to the narrow band receiving means 1005, which is completely unnecessary, it is possible to significantly reduce average power consumption and reduce power consumption.

(Sixth Concrete Example) Next, a sixth concrete example will be described. In this example, a battery saving will be described as an example in which there is a wireless terminal dedicated to narrowband transmission / reception as a wireless terminal capable of both transmission and reception, and there is a separate communication terminal dedicated to wideband reception for wideband.

The wireless terminal dedicated to narrow band transmission / reception is configured so that the transmitting means and the receiving means are separated and independent, and an effective battery saving is achieved in the case where two wireless terminals are used to perform communication in cooperation with each other. To do this:

In the sixth specific example, there is only a radio terminal dedicated to narrow band transmission / reception as a radio terminal capable of both transmission and reception by a user, and an example in which a radio terminal dedicated to wide band reception is used together for broadband. FIG. 24 shows a configuration example of the first wireless terminal 2001 and the second wireless terminal 2002 relating to the present specific example, which is the battery saving method in FIG.

In the figure, reference numerals 2001 and 2002 are wireless terminals to which the battery saving method of the present invention is applied, wireless terminal 2001 is a wireless terminal for narrow band transmission / reception, and wireless terminal 2002 is a wireless terminal for wide band reception. .

Reference numeral 2011 denotes a narrow band transmitting / receiving antenna, and 20
12a is a narrow band receiving means, 2012b is a narrow band transmitting means, 2013 is a control unit, 2014 is a battery control unit,
Reference numeral 2015 denotes a terminal unit, and the wireless terminal 2001 for narrow band transmission / reception of the present invention is composed of such components.

Of these, the narrow band receiving means 2012a
Is for demodulating a signal received from the narrowband transmitting / receiving antenna 2011, and the control unit 2013 receives the information demodulated and output from the narrowband receiving means 2012a, analyzes the content, and responds to a command. A corresponding control process is performed.

The narrow band transmission means 2012b modulates the transmission information and wirelessly transmits it by the narrow band transmission / reception antenna 2011 with a narrow band radio wave.

In the narrow band transmission / reception wireless terminal 2001 having such a configuration, a battery saving method called intermittent reception is performed in which the receiver is periodically operated or stopped in order to save power of the terminal. . This intermittent reception is a technique that has been conventionally used.
A brief description will be given with reference to (a).

The wireless terminals are divided into several groups, and the wireless lines through which the wireless base station transmits information to the wireless terminals are also time-divided into several frames.

When the wireless base station transmits information to the wireless terminal, the information is put in the frame assigned to the group to which the wireless terminal belongs and transmitted. For example, the wireless terminal 2001
Let a be the group to which A belongs. Battery control unit 201
4 is a frame of a group to which the own station belongs 230
The narrow band receiving means 20 is synchronized with the transmitted cycle of 0a.
The battery is supplied to 12a, and the narrow band receiving means 2012
a is operated. If the control unit 2013 analyzes the content of the signal demodulated by the narrow band receiving means 2012a and the received signal is addressed to its own station, the battery control unit 201
4 operates the terminal unit 2015 and sends the received signal to the terminal unit 2015.

After that, the control unit 2013 controls the battery control unit 2014 to control the frame 230 of the next group a.
The supply of the battery to the narrow band receiving means 2012a is stopped until the cycle of sending 0a. That is, the operation of the narrow band receiving means 2012a is stopped. Intermittent reception is a battery saving method that saves power by such operations.

The terminal unit 2015 displays text and image information,
This is a high-performance portable information terminal capable of processing information capable of handling voice information and the like, and has a configuration in which such a high-performance information processing terminal and a wireless device for narrow band transmission / reception are integrated.

The battery control unit 2014 is the wireless terminal 20.
01 and the wireless terminal 2001 and the wireless terminal 2
When 002 is connected and performs transmission / reception operation in cooperation with each other, the remaining battery levels of the wireless terminals 2001 and 2002 are compared, and the battery with the larger remaining capacity is used to supply the battery to the wireless terminals 2001 and 2002. It has a function of controlling to supply power.

Further, 2021 in FIG. 24 is a wide band receiving antenna, 2022 is a wide band receiving means, 2023 is a control section, and 2024 is a terminal section, and the wireless terminal 2002 dedicated to wide band reception of the present invention comprises such elements. Has been done.

Of these components, the broadband receiving means 2022 demodulates the signal received from the broadband receiving antenna 2021, and the demodulated output is sent to the control section 2023 to analyze the contents.

The terminal unit 2024 is a high-performance portable information terminal capable of processing information such as text, image information, voice information, etc. In FIG. 24, such a terminal unit 2024 is called a wireless terminal 2002. Although they are integrated, separate terminals may be used and may be connected and used as needed. In the following, the present invention will be described using an integrated wireless terminal 2002 and terminal unit 2024 as shown in FIG.

Since the wireless terminal 2001 has a narrow band bidirectional channel, it is suitable for transmitting and receiving voice and the like. Specifically, it is used as a mobile phone.

Therefore, since the wireless terminal 2001 needs to receive an incoming call from another mobile phone, it is possible to make the standby cycle in the intermittent reception longer than necessary, even though the power consumption of the terminal is saved. This will significantly impair the comfort of operation as a mobile phone. Therefore, the standby cycle needs to be set to a length that does not impair the comfort of operation as a mobile phone.

On the other hand, the terminal unit 2024 in the broadband wireless terminal 2002 is a high-performance portable information terminal capable of processing information, and has a broadband downlink channel.
Since it is integrated with 02, it is possible to receive image data and information having a large amount of information such as data.

However, since it does not have an upstream channel, it cannot receive a service by requesting information and receiving a service from the radio base station. Therefore, as a method to receive such services,
Control unit 2013 of wireless terminal 2001 for narrowband wireless communication
And the control unit 20 of the wireless terminal 2002 for broadband wireless communication.
There is a method of connecting and using 23.

As a method for connecting the narrow band transmission / reception wireless terminal 2001 and the wide band reception wireless terminal 2002, a wireless connection method using infrared rays or the like may be used in addition to the physical connection method.

Of these, in the case of wireless connection using infrared rays, since it can be realized at low cost and no physical connection is required, there is no problem such as an increase in capacity of the wireless terminal 2002. In addition, the wireless terminal 2001 is set to, for example, PCM.
If a card-type wireless terminal such as a CIA card can be inserted and connected to the wireless terminal 2002, the capacity of the wireless terminal 2002 does not increase and the terminal becomes very easy to use.

The same applies to these connection methods when the wireless terminal 2002 for wideband reception and the terminal section 2024 are separate terminals. For example, the wireless terminal 2
One example is a mode in which 001 and 2002 are integrated type or separate card type terminals and are inserted into the terminal section 2024 to be connected.

Now, the radio terminal 2001 for narrow band transmission / reception
When the wireless terminal 2002 for broadband reception is connected and used, the purpose is to receive a service of requesting information from a wireless base station and obtaining the requested information, not voice communication such as a telephone call.

Therefore, even if the standby period in the narrow band receiving means 2012a is changed to a longer period than when used alone, the comfort of operating the wireless terminal 2001 is never impaired, and rather, the narrow band reception is performed. Means 2012a
The average power consumption of the wireless terminal 2001 is considerably reduced, and the wireless terminal 2001 can be continuously used for a long time.

Therefore, when the narrow band wireless terminal 2001 and the wide band wireless terminal 2002 are connected and used, the battery control unit 2014 supplies the battery power with a cycle several times as long as the reception waiting cycle. Control is performed so that the wireless terminal 2001 saves power.

For example, when the reception waiting period is doubled, the wireless terminals 2002 belonging to the group a have 2300
The battery control unit 2 is synchronized with the transmission cycle of a '.
014 to control the battery power supply,
The narrow band receiving means 2012a is operated by intermittent power supply at an interval of twice this reception waiting cycle (FIG. 25).
(B)).

The wireless terminal 2001 and the wireless terminal 200
When using the wireless terminal 2003 in which the two are integrated,
This battery saving method can be applied. That is, even with this integrated wireless terminal 2003, the purpose of use by the user is not voice communication such as telephone call,
In the case of receiving a service of requesting information from the wireless base station and obtaining the requested information, the narrow band receiving means 2
Changing and lengthening the standby period of 012 reduces the average power consumption of the narrow band receiving means 2012a and enables the wireless terminal 2003 to be used continuously for a long time. Therefore,
Also in this case, applying this battery saving method is effective for power saving.

When the narrowband wireless terminal 2001 and the wideband wireless terminal 2002 are connected and used, there are various methods for supplying battery power. One is to supply each battery by its own battery. In this case, since the battery power is supplied independently of each other, there is an advantage that the control is easy, but if one of the batteries runs out, the service cannot be received.

As a second method, one of the terminals supplies battery power to both terminals.

This method also has the advantage of being easy to control, but if the battery of the terminal supplying the battery runs out, the service cannot be received even though the other battery remains. Can't be overcome.

Therefore, as a third method, a narrow band transmission / reception wireless terminal 2001 and a wide band reception wireless terminal 200 are provided.
At least one of the two terminals is equipped with a battery control unit that comprehensively controls the supply of battery power to both terminals, and the remaining battery levels of both terminals are compared,
A method of supplying a battery to both the wireless terminals 2001 and 2002 when the remaining amount is large can be considered.

In this example, the wireless terminal 2001 is provided with a battery control unit 2014 so that the wireless terminals 2001, 200
Controls the supply of the battery power of 2 comprehensively. That is, the battery control unit 2014 of the wireless terminal 2001 compares the remaining battery levels of the wireless terminals 2001 and 2002, and supplies the battery power to the wireless terminals 2001 and 2002 from the battery with the larger remaining capacity. To control.

Although this method complicates control, it is possible to prevent service interruption due to battery exhaustion of one of the terminals.

In the third method, at least one of the terminals is equipped with a battery control unit for controlling the battery supply of both terminals in a comprehensive manner. It is also possible to control so that the battery level of the battery will increase.

Although various concrete examples have been described above, in short, the present invention provides a wideband radio channel capable of high-speed transmission but consumes a large amount of power, and a low-speed transmission, but consumes less power. In a wireless communication system such as an SDL transmission system that performs communication using a narrow band wireless channel together, when receiving a transmission from a base station, transmission from the transmitting side by a wireless channel is performed for power saving. When there is no necessary information, the receiving side turns off the power by the power off command from the transmitting side, only the power on command is monitored from the transmitting side, and the receiving system is activated when the power on command is received. It is designed so that it can be converted to electric power.

Therefore, power saving of the portable terminal can be promoted.

Further, the battery remaining amount is checked and a symbol is displayed according to the remaining amount,
The level of the remaining amount is compared with the reference value of the battery capacity required for transmission and reception, and whether the transmission or reception is possible is notified according to the result. According to this, since it is possible to know in advance whether or not transmission / reception is possible, it is possible to prevent a trouble that the battery runs out during communication in advance.

Further, the detection result of the remaining amount of the battery of the wireless terminal is notified to the base station side so that unnecessary transmission is not performed. As a result, it is possible to prevent the wireless terminal from performing wasteful transmission when the battery is dead and cannot be received.

Further, when the wireless terminal observes the channel use state and the like and determines that the wireless terminal does not perform transmission, the wireless terminal is controlled to be turned off for a predetermined time. As a result, it is possible to reduce the power consumption of the portable wireless terminal.

Further, in the SDL communication system, in order to enhance the battery saving effect of the communication terminal for SDL communication, even when the wireless terminal performs communication using the receiving means for wide band, the wireless base station side (network The receiving means for the wide band is not turned on until a power-on command is received from the side).

In the SDL communication system, SD
In order to sufficiently perform battery saving of the narrow band system of the communication terminal for L communication, the narrow band system is configured by being divided into a transmitting unit and a receiving unit. When performing communication using the receiving means for the wide band, the power supply of the receiving means for the narrow band of the wireless terminal is controlled to be turned off. According to this, when the power source of the narrow band receiving means is turned off, it is not possible to perform communication using both narrow band and wide band downlink (downlink) channels. As a result, when performing communication using only wideband, battery power is not supplied to the narrowband receiving means, which is completely unnecessary, so it is possible to significantly reduce average power consumption and reduce power consumption. Becomes

Also, a first wireless terminal having upper and lower wireless channels (uplink and downlink) for a narrow band and a second wireless terminal having a downstream wireless channel (downlink) for a wide band are connected and used. In this case, the cycle is changed in the battery saving system in which the first wireless terminal receives for a predetermined period of time for each predetermined period and waits for and receives information from the narrow band wireless base station to the first wireless terminal. This cycle change is made to be longer than that under the condition that voice communication such as telephone is enabled under the condition that voice communication such as telephone is not performed. Therefore, the wireless terminal can lengthen the period of useless standby reception of a telephone in a situation where voice communication such as a telephone is not performed, and can reduce power consumption for narrow band.

[0214]

As described above, according to the present invention, the broadband wireless base station switches on / off the power supply of the broadband receiving means of the wireless terminal according to the presence / absence of information to be transmitted from the local station to the wireless terminal. It becomes possible. That is, when there is no information to be transmitted to the wireless terminal, the power supply of the wideband receiving means of the wireless terminal can be turned off, so that the power consumption of the wireless terminal can be suppressed. In addition, in the SDL communication system, it becomes possible to sufficiently perform battery saving of the wide band / narrow band system of the communication terminal for SDL communication, and further power saving can be achieved.

[Brief description of drawings]

FIG. 1 is a diagram for explaining a specific example of the present invention,
The conceptual diagram of the radio | wireless communications system made into the object of this invention.

FIG. 2 is a diagram for explaining a specific example of the present invention,
The terminal device block diagram as a 1st specific example of this invention.

FIG. 3 is a diagram for explaining a specific example of the present invention,
3 is a flowchart for explaining a specific example of the present invention.

FIG. 4 is a diagram for explaining a specific example of the present invention,
3 is a flowchart for explaining a specific example of the present invention.

FIG. 5 is a diagram for explaining a specific example of the present invention,
3 is a flowchart for explaining a specific example of the present invention.

FIG. 6 is a diagram for explaining a specific example of the present invention,
3 is a flowchart for explaining a specific example of the present invention.

FIG. 7 is a diagram for explaining a specific example of the present invention,
The operation | movement sequence diagram for demonstrating the specific example of this invention.

FIG. 8 is a diagram for explaining a specific example of the present invention,
The operation | movement sequence diagram for demonstrating the specific example of this invention.

FIG. 9 is a diagram for explaining a specific example of the present invention,
The operation | movement sequence diagram for demonstrating the specific example of this invention.

FIG. 10 is a diagram for explaining a specific example of the present invention, and an operation sequence diagram for explaining a specific example of the present invention.

FIG. 11 is a diagram for explaining a specific example of the present invention, and is a diagram showing a configuration example of a wireless terminal as a specific example of the present invention.

FIG. 12 is a diagram for explaining a specific example of the present invention and is a diagram for explaining a specific example of the present invention.

FIG. 13 is a diagram for explaining a specific example of the present invention, and is a diagram showing a configuration example of a wireless terminal as a specific example of the present invention.

FIG. 14 is a diagram for explaining a specific example of the present invention, showing an example of displaying the remaining battery level of a wireless terminal as a specific example of the present invention.

FIG. 15 is a diagram for explaining a specific example of the present invention and is a diagram showing a configuration example of a wireless terminal as a specific example of the present invention.

FIG. 16 is a diagram for explaining a specific example of the present invention and is a diagram for explaining a specific example of the present invention.

FIG. 17 is a diagram for explaining a specific example of the present invention, which is a diagram for explaining a specific example of the present invention.

FIG. 18 is a diagram for explaining a specific example of the present invention and is a diagram for explaining a specific example of the present invention.

FIG. 19 is a diagram for explaining the specific example of the present invention and is a conceptual diagram for explaining the fourth specific example of the present invention.

FIG. 20 is a diagram illustrating a specific example of the present invention, and is a terminal configuration diagram for describing a fifth specific example of the present invention.

FIG. 21 is a diagram for explaining a concrete example of the present invention and is a state transition diagram for explaining a control procedure of the system at the time of an information transmission request in the fifth concrete example of the present invention.

FIG. 22 is a diagram for explaining the specific example of the present invention and is a state transition diagram for explaining another control procedure of the system at the time of the information transmission request in the fifth specific example of the present invention.

FIG. 23 is a diagram for explaining a specific example of the present invention, which is a state transition diagram for explaining another control procedure of the system at the time of an information transmission request in the fifth specific example of the present invention.

FIG. 24 is a diagram illustrating a specific example of the present invention, and is a terminal configuration diagram for describing a sixth specific example of the present invention.

FIG. 25 is a diagram for explaining the specific example of the present invention, and is a diagram for explaining an example of the reception waiting cycle in the sixth specific example of the present invention.

[Explanation of symbols]

101 ... Narrow band transmitting / receiving means 102, 1006 ... Wide band receiving means 103, 1003, 2013 ... Control section 104, 1001, 2011 ... Narrow band transmitting / receiving antenna 105, 2021 ... Wide band receiving antenna 301, 401, 1000, 2001, 2002 ... Wireless terminal 302 ... Broadband wireless base station 303 ... Narrowband wireless base station 304 ... Buffer 305 ... Server 306 ... Network 307, 402, ... Wireless base station 1004 ... Battery control unit 1005, 2012a ... Narrowband receiving means 1007, 2012b ... Narrow Band transmission means 2014 ... Battery control unit 2015 ... Terminal unit.

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁶ Identification code Internal reference number FI Technical indication H04Q 7/30

Claims (8)

[Claims] 1. A narrow band wireless base station having narrow band transmitting / receiving means for information transmission, and a wide band wireless base station having wide band transmitting means for information transmission and a buffer for storing information to be transmitted. A wireless communication system comprising a wireless terminal having a narrow band transmitting / receiving unit for transmitting / receiving information to / from the narrow band wireless base station and a wide band receiving unit for receiving information from the wide band wireless base station, When there is information to be transmitted to the wireless terminal in the buffer, the narrowband wireless base station transmits a signal instructing to turn on the power supply of the wideband receiving means of the wireless terminal to the wireless terminal. A power supply control method of a wireless communication system, characterized by notifying. 2. A narrow band wireless base station having a transmitting / receiving means for narrow band information transmission, and a wide band wireless base station having a transmitting means for wide band information transmission and a buffer for storing information to be transmitted. A wireless communication system comprising a wireless terminal having a narrow band transmitting / receiving unit for transmitting / receiving information to / from the narrow band wireless base station and a wide band receiving unit for receiving information from the wide band wireless base station, When there is no information to be transmitted to the wireless terminal in the buffer, the narrowband wireless base station or the broadband wireless base station is provided with a signal instructing to turn off the power supply of the wideband receiving means of the wireless terminal. A method for controlling a power supply of a wireless communication system, the method including transmitting the information to notify the wireless terminal. 3. A wireless communication system using a wireless terminal having a battery as a power source, the wireless terminal having a transmitting / receiving means for transmitting information in a narrow band and a receiving means for transmitting information in a wide band. The terminal has at least a switching means for controlling the power supply of the receiving means for wideband information transmission, and a power supply for the wideband receiving means when the signal instructing to turn off the power supply of the wideband receiving means is received. Means for controlling the switch means to be turned off until a signal for instructing is transmitted. 4. A narrowband wireless base station having a transmitting / receiving means for transmitting narrowband information, a wideband wireless base station having transmitting means for transmitting wideband information, and the narrowband wireless base station. In a wireless communication system comprising a wireless terminal having a narrowband transmitting / receiving means for transmitting / receiving information and a wideband receiving means for receiving information from the wideband wireless base station, the wireless terminal is provided with energy remaining in its own battery. A wireless communication system comprising means for detecting that the amount of charge has dropped below a predetermined amount, and means for notifying that the amount of energy remaining in the battery has dropped below a predetermined amount . 5. A narrowband wireless base station having a transmitting / receiving means for transmitting narrowband information, a wideband wireless base station having transmitting means for transmitting wideband information, and the narrowband wireless base station. In a wireless communication system comprising a wireless terminal having a narrowband transmitting / receiving means for transmitting / receiving information and a wideband receiving means for receiving information from the wideband wireless base station, the wireless terminal uses a battery as a power source, A signal that means that information from the broadband wireless base station cannot be received when detecting means for detecting the energy capacity of the battery is provided, and when the power supply capacity does not reach a predetermined capacity from the detection result of the detecting means. Is provided to the narrowband wireless base station. 6. A wireless communication system in which a wireless base station and a wireless terminal are connected by a wireless line, and the wireless terminal includes means for determining whether to perform transmission and means for measuring time, in a wireless communication system. The power supply control method for a wireless communication system, wherein the wireless terminal, which has determined not to perform the power supply, controls to turn off the power supply for a predetermined time. 7. A narrowband wireless base station having a transmitting / receiving means for transmitting narrowband information, a wideband wireless base station having transmitting means for transmitting wideband information, and the narrowband wireless base station. In a wireless communication system comprising a wireless terminal having a narrow band transmitting means for transmitting and receiving information, a narrow band receiving means, and a wide band receiving means for receiving information from the wide band wireless base station, the wireless terminal has wide band information. A radio communication system comprising means for controlling to turn off the power supply of the narrow band receiving means when performing communication using the receiving means for transmission. 8. A narrowband radio base station having a transmitting / receiving means for transmitting narrowband information, a wideband radio base station having transmitting means for transmitting wideband information, and the narrowband radio base station. A wireless communication system comprising a first wireless terminal having a narrow band transmitting / receiving means for transmitting / receiving information by a second wireless terminal having a wide band receiving means for receiving information from the broadband wireless base station. In the wireless communication system in which the first wireless terminal performs reception for a certain period of time in each predetermined period and awaits and receives information from the narrowband wireless base station to the first wireless terminal, the first wireless terminal and the second wireless terminal The method for controlling a power supply in a wireless communication system, wherein the cycle is changed when the wireless terminal is used by connecting.