JP2002135203A - Radio communication system and radio terminal - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a power-saving radio terminal. SOLUTION: The radio terminal comprises a circuit 33 for receiving a radio transmission wave at a first transmission rate, a circuit 34 for transmitting/ receiving radio transmission waves at a second lower transmission rate, a circuit 35 for receiving a radio transmission wave at a third transmission rate lower than the second transmission rate, and a control means 32 having a function for turning on/off the power supplies of the circuit receiving a radio transmission wave at a first transmission rate and the circuit transmitting/receiving a radio transmission wave at a second transmission rate, based on the information of a signal received by the circuit receiving a radio transmission wave at a third transmission rate. In a state with the reception of a signal at first and second transmission rates being in wait, only the circuit for receiving a radio transmission wave at a third transmission rate is brought into operating state and the circuit for transmitting/receiving a radio transmission wave at the first and second transmission rates is held in a nonoperating state by turning the power off.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a radio communication system and a radio terminal device for acquiring information via a radio channel by a portable radio terminal.

[0002]

2. Description of the Related Art A conventional information providing service by wireless communication (for example, a database search system) aims to provide a real-time service anytime and anywhere. To receive this service, for example:
You need a mobile phone and a personal computer.

FIG. 28 shows a conventional service system in which information is provided wirelessly by combining a mobile phone and a personal computer. In the figure, reference numeral 401 denotes a communication network (network), for example, a wired communication network. Reference numeral 402 denotes a mobile phone service base station (wireless base station); 403, a data terminal such as a personal computer, which can perform data communication with a built-in mobile phone and a modem; 405, a service area; Wireless communication area.

Although the service area of a mobile phone is very wide, there are some areas outside the service area depending on the terrain and the arrangement conditions of base stations. In FIG. 28, an area 405 is covered by a wireless base station 402 connected to a communication network 401. The terminal 403 is located outside the service area, and when trying to receive information provision by this terminal, it must first move to the service area.

[0005] Now, the user holding the terminal 403 of A, while watching the display of the received electric field strength of the portable telephone, can read the terminal 403.
To move. By moving, terminal A 403 becomes 4
04 and enters the inside of the service area 405. Here, communication with the base station 405 can be performed for the first time, and the user accesses the information database via the communication network 401 and starts acquiring information.

[0006] Here, it is assumed that a user using a mobile portable terminal seeks real-time information on the spot, and an effort to expand a communicable zone is made by communication. Have been done by the business.

[0007] However, not all information required by the user is information that requires real-time, and some information has a high degree of urgency and many pieces of information have a low degree of urgency.

When acquiring information with a low degree of urgency, the user moves to a service area where wireless communication can be performed or wants to use the information later. It is also an important service to perform an operation for obtaining the information so that the trouble of receiving information can be eliminated.

[0009] However, at present, there is no environment in which such inconvenience can be eliminated.

[0010]

In the above conventional example, when a user attempts to obtain information, the terminal must be moved in consideration of an area where wireless communication is supported. The information service system provided by wireless communication that is currently being serviced has a small amount of information, so it was able to sufficiently cope with a service using a low-speed line, but as multimedia became noticed,
There has been a growing demand to be able to send and receive vast amounts of data at high speeds.

For example, since a mobile information terminal capable of handling an enormous amount of data and a single magazine can be handled like a multi-function / multimedia-compatible portable information terminal, Inevitably, large capacity transmission is required. It is difficult to provide large-capacity transmission over a very wide area like the current mobile phone system, because of limited frequency resources and the need to install many high-speed transmission base stations. is there.

Therefore, it is necessary to overcome this. In addition, since terminals are used by individuals, they must be reduced in size and weight, and for that purpose, it is necessary to promote power saving, which is an important factor in determining these. That is, for a portable terminal, a power source is mainly a battery, which occupies a large specific gravity in both volume and weight.

Therefore, the object of the present invention is to:
An object of the present invention is to provide a wireless communication system and a wireless terminal device that can save power and can be reduced in size and weight.

[0014]

In order to achieve the above object, the present invention is as follows.

[1] To achieve the above object, the present invention provides:
A receiving circuit for receiving a wireless transmission wave having a first transmission rate;
A transmission / reception circuit for transmitting and receiving a radio transmission wave having a second transmission rate lower than the first transmission rate;
A receiving circuit for receiving a radio transmission wave at a third transmission speed lower than the transmission speed of the first transmission speed, and information of a signal received by the reception circuit for the radio transmission wave at the third transmission speed.
And a control unit having a function of turning on / off a power supply of a radio transmission wave receiving circuit having a transmission rate of 2 and a transmission / reception circuit of a radio transmission wave having a second transmission rate. When the reception of the wireless transmission wave of the third transmission rate is in a standby state, only the receiving circuit of the wireless transmission wave of the third transmission rate is turned on, and the transmission and reception circuits of the wireless transmission wave of the first and second transmission rates are turned off. It is characterized in that it is kept in a non-operation state.

[2] In order to achieve the above object, the present invention provides a receiving circuit for receiving a radio transmission wave having a first transmission rate, and a second transmission rate lower than the first transmission rate. A transmission / reception circuit for transmitting and receiving a wireless transmission wave, a detection unit for identifying that the wireless terminal device can receive the wireless transmission wave at the first transmission rate, and at least a And a power control unit having a function of turning on and off a power supply of a radio transmission wave receiving circuit having a transmission rate of 1 in a region where a communication service at the first transmission rate is not provided. Turn off the power of the receiving circuit for the wireless transmission wave at the transmission speed, and
In the area where the communication service is provided at the transmission rate of, when the detecting means detects that the communication service is within the service area, the power is turned on and the reception is performed at the first transmission rate. And

[3] In order to achieve the above object, the present invention provides a receiving circuit for receiving a radio transmission wave having a first transmission rate, and a second transmission rate lower than the first transmission rate. And a power supply control unit having a function of turning on / off a power supply of a radio transmission wave receiving circuit of the first transmission rate in accordance with reception information at the second transmission rate. In the wireless terminal device comprising: the power control unit, the identification signal transmitted to the wireless terminal device at the second transmission rate immediately before the reception service at the first transmission rate is provided, It is characterized in that the receiving circuit for the wireless transmission wave at the first transmission rate is activated, and the receiving circuit for the wireless transmission wave at the first transmission rate is stopped immediately after the reception service at the first transmission rate ends. And

[4] In order to achieve the above object, the present invention provides one or a plurality of small radio zones for providing communication services to mobile terminals and a large radio zone for providing communication services over a wide area. In a wireless communication system having a zone configuration in which the transmission rate of data transmitted by the small wireless zone is higher than the transmission rate of data transmitted by the large wireless zone, and the large wireless zone covers the small wireless zone, It has a receiver for the zone and a receiver for the small radio zone, and has a measurement discriminator for measuring and discriminating the electric field strength. When it is determined from the electric field strength that the signal from the large wireless zone has been received, the power of the receiver that receives the large wireless zone message is turned on. Wherein the structure to be.

Further, a large radio zone is included in the zone.
If the message indicating the presence or absence of the small zone is broadcast, the mobile terminal, when receiving a message indicating that the small wireless zone exists from the radio in the large wireless zone, It is characterized in that the power of the receiving receiver is turned on.

The following operations and effects are obtained by adopting the above-mentioned configurations [1] to [4].

[0021] The battery saving system of the above-mentioned configuration [1] has a low-power-consumption receiving circuit that operates steadily,
On / off part of the power supply of the receiving circuit operated by the wideband wave,
On / off part of the power supply of the transmission circuit operated in the middle band wave,
A power control unit for controlling on / off of the power supply of the broadband wave receiving circuit or the medium band wave transmitting / receiving circuit based on the information received by the low power consumption receiving circuit in the wireless terminal device, and information from the narrowband wave receiving circuit; If it is necessary to receive a wideband wave, the power supply of the wideband wave receiving circuit is turned on, and if not, the power supply is turned off.

Generally, the power consumption of each wireless device constituting a wireless terminal device increases as the bandwidth increases. If the power per band is the same, a wide bandwidth consumes large power. Further, since the loss (loss) of each device or line increases as the frequency increases, more power is consumed as the frequency is increased to compensate for the loss.

Although transmission of a narrow band signal can be performed at a low frequency, transmission of a wide band signal uses a high frequency.
The transmission speed of the narrow band signal is 1-2 kbps, the middle band signal is 32 kbps, and the wide band signal is 155 Mbps. Although a narrow band signal can be transmitted in a band of several hundred MHz, it is difficult for a wide band signal to use this band because no other communication can be performed at all.
It has to be performed by the millimeter wave band such as the band. From the above relationship between bandwidth and frequency, reception of a narrowband signal can be performed with extremely low power, and reception of a wideband signal requires large power.

In the battery saving system of the present invention according to the first aspect of the present invention, the narrow-band wave receiving circuit is operated for normal calling, and the wide-band and medium-band wave transmitting / receiving circuits are turned off. When the narrow-band reception circuit detects a call signal of the terminal, the power supply control unit turns on the power of the wide-band wave reception circuit and the medium-band wave transmission / reception circuit, and performs the reception operation in the wide-band wave and the mid-band reception. Performs transmission and reception operations on waves. When the communication in the broadband wave or the middle band wave is completed, the power supply of the wide band wave receiving circuit or the middle band wave transmitting / receiving circuit is turned off again. According to the present invention, by performing reception at the time of standby using only the narrowband signal, only the reception circuit of the narrowband wave can be operated at the time of standby, and the battery can be saved while suppressing power consumption.

In the above configuration [2], the means for detecting whether or not the broadband communication service can be used is normally operated, and the reception power of the wideband wave is turned off. If it is detected that the reception is possible, the power supply control unit turns on at least the power of the broadband wave receiving circuit and performs the receiving operation with the wideband wave.
After the reception of the wideband wave is completed, the power control unit turns off at least the power of the broadband wave receiving circuit. According to the present invention, the power supply of the wideband wave receiving circuit is turned off when the wideband wave service is not performed, and the wideband wave detecting means uses a means with low power consumption so that the service quality is not impaired. Saving becomes possible.

In the battery saving method having the above-mentioned configuration [3], the receiving circuit for the middle band is normally operated,
The reception power of the broadband wave is stopped, and a code indicating the start of reception of the wideband wave is inserted in the information received in the middleband wave, and the reception of the wideband wave is performed in the information received in the middleband wave. Is detected, the power supply control unit activates the power supply of the broadband wave receiving circuit and performs the receiving operation on the wideband wave. When broadband wave reception is completed,
The power supply controller stops the power supply of the broadband wave receiving circuit. In the present invention, when the information of the wideband wave is intermittently transmitted, the power of the wideband wave receiving circuit is stopped while the wideband wave information is not transmitted, so that the battery can be saved without deteriorating the service quality. Become.

According to the configuration [4], the high-speed data receiver that consumes a large amount of power is turned on only when it enters the large wireless zone including the small wireless zone, so that a very efficient battery is used. Saving can be realized. Therefore, the standby time of the mobile terminal can be extended.

[0028]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail with reference to the drawings. First, an embodiment of a wireless communication system that enables a user to receive necessary information without being aware of a wireless service area will be described.

According to the present invention, in order to make effective use of radio resources,
It is effective when applied to communication in general. However, in view of multimedia, it is particularly effective in the wireless communication system proposed by the inventors of the present application from the viewpoint of effective use of the wireless resources, so this system will be described first.

The present inventors have made it possible to carry out high-speed communication, to make effective use of frequency, and to reduce the size and size of the terminal for portability and practical convenience on the user side. From the viewpoint of enabling the use of high-performance portable wireless communication terminals, the transmission speed of the downlink from the base station to the terminal is at least one order of magnitude higher than the transmission speed of the uplink from the terminal to the base station Proposed a wireless communication system (SDL system) having an asymmetric transmission rate (for example, see Japanese Patent Application No. Hei 6-137621).

The SDL system is as shown in FIG. 1 and includes a radio base station BS connected to a public network Network. Each radio base station BS has a downlink R1 having a wide frequency band and a narrow frequency band R1. Upline R2 with bandwidth
With In each radio base station BS, a radio communication terminal terminin a service area A in which communication is possible via the downlink R1.
al, a wireless communication terminal in each service area A including a movable wireless communication terminal (mobile terminal) that can communicate with the downlink R1 and the uplink R2, and a public network.
Information can be exchanged between terminals and databases connected to the network.

Here, a wireless communication terminal carried by an individual is generally a personal dedicated machine in which one person performs input and output. Therefore, a transmission capacity and method that are consistent with the amount of information transmitted and received by one individual is required. In addition, since individual users carry such wireless communication terminals for personal use, naturally, they are required to be small and lightweight, and also to save power so that extra heavy batteries need not be carried. Is done.

Considering the use of wireless communication terminals carried by individuals, for example, in the case of multimedia, in the case of multimedia, appreciation of movies, appreciation of music, shopping, use of databases, telephone calls, writing, etc. Transfer, sales data and reservation data transmission, ticket reservation, acquisition of mass media information such as magazines and newspapers (reading etc.), etc. Of these, voice, documents, etc. need to be sent from the terminal side to the base station. Data, reservation data, commands, etc.
These can be suppressed to about several kilobits per second by using the technique of data compression together, and so high speed transmission is not required.

On the other hand, it is image data in the case of a movie (moving image) that needs to be transmitted at the highest speed, and it is only from the base station that such a large amount of data needs to be transmitted at a high speed. From the viewpoint of effective use of the frequency band, from the viewpoint of effective use of the frequency band, the downlink from the base station side, that is, only the downlink is wideband, and the uplink from the terminal side to the base station (uplink to the base station side). It is sufficient that a transmission path of a narrow band (that is, low-speed transmission) can be secured in the link.

For this reason, as described above, the SDL system employs the basic configuration of the broadband downlink and the narrowband uplink.

The relationship between the wireless communication base station BS and the mobile terminal capable of wireless communication in this SDL system will be described in more detail. The wireless communication base station BS and the mobile terminal which is a mobile terminal capable of wireless communication in the service area A thereof include a broadband downlink R1 from the base station BS to the mobile terminal as a wireless line between them, and a mobile terminal. To base station B
A narrow-band uplink line R2 to S is provided and these lines can communicate with each other.

In the SDL system, information is transmitted in a wide band (for example, 100 Mbps or more) on the downlink R1. Therefore, in order to realize the SDL system by radio transmission using radio waves, it is necessary to secure a frequency bandwidth of 100 MHz or more (however, when multi-level modulation is not performed). Radio waves have a low frequency, so it is difficult to hinder communication even with the presence of obstacles, so we want to use a low frequency band, but the low frequency band has already been assigned to various other uses, I can not use it.

Therefore, it is good to use the microwave band as the next best measure. However, in the microwave band, there is a problem that one user occupies an extremely wide bandwidth of 100 MHz or more. , Not realistic.

Therefore, in order to secure a bandwidth of 100 MHz or more, it is necessary to use a quasi-millimeter wave band or a millimeter wave band having high directivity, or to use infrared rays having no limitation in frequency width and the like.

When a quasi-millimeter wave band, a millimeter wave band, or infrared light is used, these must be communicated in a line of sight, and the attenuation increases with the propagation distance. Presents various challenges.

Further, since the broadband downlink R1 is used within the line of sight, the service area is narrow, and it is difficult to develop the service area densely over a wide range. Therefore, with a view to providing services in a wide range, downlinks with a narrow frequency band are added. Since the added downlink has a narrow frequency band, the transmission speed is limited to about several tens of Mbps. However, since the band is narrow, a microwave band can be used, and the service area is wide.

Therefore, according to the present invention, when a user enters a wide frequency band in a limited narrow area, transmission of information desired by the user is received from the information providing station side, and the user does not need to be aware of the transmission. An embodiment for enabling information to be received will now be described.

According to the present invention, power can be saved basically on the assumption that communication is performed in line of sight, and necessary information can be automatically obtained while securing the degree of freedom (mobility) of the terminal. For the purpose of doing so, it was implemented as follows.

(First Embodiment) FIG. 2 shows a first embodiment of the present invention. FIG. 3 shows a procedure up to information acquisition at the user / terminal / communication network.

This wireless communication system includes a communication network 1, an information providing station 3 connected to the communication network 1, and a wireless base station 2.
And a portable wireless terminal 4. The user uses the mobile terminal 4 to obtain information from the information providing station 3 via a wireless line. The information providing station 3 may be a functional element for performing a database service or the like, a system for distributing articles provided by mass media such as magazines and newspapers to subscribers, and the like. The terminal 4 can communicate with the base station 2 within an area 6 covered by the wireless base station 2, and cannot communicate outside the area.

Now, it is assumed that the user wants information outside the service area 6. At this time, the terminal 4 is at the position A. The user inputs desired information items into the terminal 4 (procedure S1). The terminal 4 stores items input by the user in its own built-in memory. The user who has completed the input puts the terminal 4 in his pocket or bag and performs daily life.

The terminal 4 performs carrier sensing at a predetermined frequency and observes whether or not the terminal 4 has entered the service area 6 covered by the radio base station 2. When the user moves with the terminal 4 for commuting or going out, the terminal 4 enters the service area 6 covered by the base station 2. In FIG. 2, the position 5 indicates the position of the terminal 4 that has entered the service area 6.

The terminal 4 detects that it has entered the communication area (procedure S2). The terminal automatically makes a call to the base station 2 and requests allocation of a wireless channel (procedure S
3). The base station 2 allocates a wireless channel (procedure S4), whereby a wireless channel is established.

In addition, there are many procedures for establishing a wireless channel in various wireless protocols (authentication, charging, location registration, etc. of a terminal), but these are omitted because they do not affect the essence of the present invention.

The terminal 4 reads the item of the information acquisition request input by the user from its internal memory,
(Step S5). In the information providing station 3, an answer / search result to the question / search item made by the user is transmitted to the terminal 4 via the communication network 1 and the base station 2.
(Step S6).

The terminal 4 that has confirmed the acquisition of the information performs a procedure for disconnecting the wireless line with the communication network 1 (steps S7 and S5).
8). The terminal 4 notifies the user that the information acquisition has been completed (step S9). This notification is made by turning on a buzzer or an LED.

As described above, the user inputs information to the terminal at an arbitrary time when the terminal wants the information, writes the information in the memory, and automatically detects that the terminal has entered the communicable area, makes a call, and obtains information. By doing so, it becomes possible for the user to automatically acquire information without being conscious of the communication area.

(Second Embodiment) A second embodiment will be described.

In the second embodiment, the date and time at which information is to be obtained can be specified.

That is, in the first embodiment, when the user inputs an information item, "date", "time",
Information such as “time” is stored in the terminal 4 at the same time.

The information desired by the user may be meaningless if the information has a large delay depending on the type, or the value may not change even with a certain delay. For example, stock quotes and the like are meaningless if delayed, so immediateness is required,
Store information and the like do not change in a short period of time, and magazine information and the like are allowed if they are delayed for about several hours.

Therefore, when inputting an information item, the user sets the time until the information is obtained, or the terminal 4 has a function of determining the type of the information, and the terminal 4 automatically has a function of determining the type of the information. It is possible to set the time and respond. In order to realize this function, it is necessary for the terminal 4 to have the function, the clock, and the calendar function.

If the terminal 4 cannot enter the communication area (service area 6) by the set time and cannot acquire the information, the terminal 4 informs the user by using a buzzer or display. The user is notified that other measures must be taken to obtain the desired information by the time the desired time is reached.

In this case, the user acquires the information by resetting the desired time and extending the time, discarding the acquisition request, or moving to a communicable service area.

As described above, the setting of the time until acquisition is performed by the terminal 4.
The terminal 4 performs time management in advance, so that it is possible to prevent the irrationality of acquiring information that has become obsolete due to delay, and to acquire only necessary information by the required time. Will be possible.

(Third Embodiment) The third embodiment is an embodiment relating to a method of connecting a portable telephone.

In a conventional portable telephone, dialing can be performed only when the terminal enters a communicable area and the terminal becomes receivable. However, when the user is out of the communication area, no line can be connected and dialing cannot be performed. A user who intends to communicate moves to a communicable area and makes a telephone call based on the received electric field strength measurement value displayed on the mobile phone.

In order to solve this inconvenience, in this embodiment, if a dial is made in advance, the dial information is reserved in the portable telephone when the line connection cannot be established. That is, the mobile phone as the terminal 4 is provided with a memory, and when the user performs a dial operation, the mobile phone (terminal 4) performs a calling procedure when the mobile phone is within the wireless communication service area. Communication is performed, but when the mobile phone is out of the service area, the dialed number is stored in the built-in memory of the mobile phone, and a dial reservation is made. Observe by function or measure received electric field strength,
When the electric field strength becomes equal to or higher than a predetermined electric field strength, it is detected that the user has entered a communication area (service area), and a function for automatically performing a calling procedure according to the dial reservation is provided. When an automatic call is made, a function is provided to notify the user that a call is being made at the start of the automatic call operation.

In this embodiment, the user carrying the portable telephone, which is the terminal 4, only needs to perform a dial operation when communication is required. This does not matter whether the current position is inside or outside the wireless communication service area. At this time, if the terminal 4 is within the service area, the terminal 4 performs a calling procedure and performs normal communication. If it is out of the service area, the dialed number is stored in a memory built in the terminal 4 to notify that a dial reservation has been made.

The user who has completed the dial operation moves while holding the terminal 4. There is no need to check the electric field strength when moving. The terminal 4 observes whether or not it has entered the area by carrier sense or measures the received electric field strength, and detects that it has entered the communication area (service area) when the electric field strength becomes equal to or higher than a predetermined electric field strength. When the terminal 4 enters the communication area, the terminal 4 automatically performs a calling procedure and notifies the user that the calling is being performed.

According to this embodiment, there is no need for the user to dial while paying attention to the communicable area, and the user can start talking immediately after entering the communication area. Further, since it is not necessary to check whether communication is possible or not, usability is dramatically improved.

(Fourth Embodiment) The fourth embodiment enables a user to acquire information without being conscious of the communication area, and acquires the information immediately after the occurrence of certain information. This is an embodiment that makes it possible.

The fourth embodiment will be described with reference to the communication procedure shown in FIG.

In the first embodiment, information desired by the user is
If input to the terminal in advance, the information providing side automatically transmits information when the terminal enters the communication area, but if the information providing station does not have the information the user wants, or The information may occur after the information is needed in time.

For example, it is conceivable that the user wants a price change when a certain stock becomes higher than a predetermined stock price based on stock price information. As described above, there is a case where the request information input to the terminal by the user cannot be obtained even when the terminal enters the communicable area.

In this case, when information to be provided to the user occurs (procedure S21), the communication network (information providing station) searches whether the terminal 4 is in the communication area (service area 6). Here, the communication network has means for determining whether the terminal 4 is in the communication area. For example, the terminal side performs carrier sense, and when entering the communicable area, the determination is made by means for notifying the communication network side.

When detecting that the terminal 4 has entered the communication area (procedure S22), it notifies the terminal 4 that the provision of information has occurred (procedure S23). In the present embodiment, for the sake of explanation, procedures for establishing a wireless channel, such as frequency allocation and terminal authentication, are omitted, but the channel is naturally established after following these procedures. The terminal 4 notified of the information generation transmits the detailed item of the information request to the communication network side (procedure S24), and receives data from the communication network side (procedure S25). The terminal 4 which has completed the information acquisition notifies the user that the information has been acquired with a buzzer or an LED.

In the present embodiment, similarly to the first embodiment, the user can obtain information without being conscious of the communication area, and can obtain the information immediately after the information is generated. Becomes

(Fifth Embodiment) FIG. 5 shows a fifth embodiment. An information providing station 16 for providing necessary information to the user is connected to the communication network 11 and provides information via the communication network 11 or a wireless line in response to an information providing request from the user. The base station 12 covers a wide area 14 (has a wide service area), and performs wireless transmission with terminals via uplink and downlink 17 having a low transmission speed.

As an example, there is a PHS (2nd generation cordless telephone system; personal handy phone system). This system has uplink and downlink lines at a transmission speed of 32 kbps, and has a service area of 2 kbps.
It is about 00 to 500 m. Hereinafter, the present embodiment will be described with a wide area / low speed line as a PHS.

The base station 13 covers the spot-like area 15 and performs transmission through the downlink 18 having a high transmission speed. In an information providing system such as the present invention, the amount of information transmitted from the base station / communication network to the terminal is very large, whereas the amount of information transmitted from the terminal to the communication network is limited to required items and so on. Less.

Therefore, a radio communication system having a high-speed downlink used for transmitting such a large amount of information is called an SDL (Super high-speed Down).
The Link system has already been proposed (see Japanese Patent Application No. 6-137621).

Here, the high-speed downlink is several tens of M to 155.
The transmission speed is about Mbps. Hereinafter, the present embodiment will be described with the spot / high-speed downlink as SDL.

The SDL is, as shown in FIG.
Is a low-speed (low-speed) upper and lower line 507 and area 5
Cover 05. The base station 503 covers the area 506 with a high-speed (high-speed transmission) downlink (SDL) 508. When the terminal 510 is located only at the low-speed line,
The communication network 5 via the base station 502 using the low-speed line 507
01 is connected. When the terminal 510 is at a position where communication is possible not only on a low-speed line but also on a high-speed downlink, and when there is a large amount of downlink information generated when accessing a database, information is acquired using the SDL line 508.

The present invention is applied to the SDL system as described above. FIG. 6 shows a procedure for acquiring information at the user / terminal / communication network.

When the user wants the information, the user
Enter the information request / request item, etc. When the terminal is located in the area 506 where the SDL line 508 can be used, it is possible to immediately open the communication line and acquire information, but not when the terminal is outside the area.

Now, it is assumed that the low-speed uplink and downlink provided by the base station 502 are based on PHS, and the high-speed channels provided by the base stations 503 and 504 are SDL lines.

When the terminal is outside area 506 (A)
think of. In this case, the user inputs a request item to the terminal 510 (procedure S31). The terminal 510 transmits the request item to the PHS base station 502 using the PHS (procedure S32). The base station 502 notifies the information providing station of the request item via the communication network 11.

The information providing station verifies whether the notified request item matches the content of the information provision, and transmits the item, table of contents, summary, etc. of the information to be provided to the terminal 510 via the communication network 401. To the terminal 510 (step S33). At this time, the ID (identification code) of the information provider
Or the serial number of the information to be provided to the user.

The terminal 510 displays the content indicated by the information providing station to the user on the display of the terminal, and requests a confirmation (step S34). If the user agrees on the content to be provided, the user inputs to the terminal 410 that the content has been confirmed and acknowledged (step S35).

The terminal 510 sends a confirmation notice to the information providing station via the communication network 401 (step S36). The communication network 401 notifies the terminal 510 to enter a standby state for acquiring information (step S37). Next, terminal 510 notifies the user that the terminal is in standby for information acquisition (procedure S
38).

When the user enters the standby mode, the user can put the terminal 510 in a bag or pocket and perform daily work.

Terminal 510 enters a standby state for detecting whether it is in the SDL area. The means for determining whether an area is an SDL area includes a method in which a dedicated pilot carrier is transmitted from the base stations 503 and 504 and the terminal performs carrier sensing, and a method in which a specific signal transmitted from the base stations 503 and 504 is transmitted to the terminal. A receiving method may be considered.

With the movement of the user, the terminal 510
It is assumed that the user has entered the area 506. Terminal 510 detects that it has entered the SDL area by carrier sense (step S39).

Terminal 510 automatically notifies communication network 140 that it has entered the high-speed area using the PHS line (step S310). At this time, it is assumed that the communication network 401 is notified of the ID of the terminal itself, the ID of the information providing station seeking information provision, the serial number of the information seeking information, and the like.

The communication network 401 transmits these to the information providing station. Request information pre-reserved from the information providing station is sent to the terminal 51 via the SDL line 508 via the communication network.
0 (step S41). The terminal 510 stores the received information in a memory built in the terminal. The terminal 510 that has completed the information reception notifies the user of the completion of the information acquisition by a buzzer, an LED display, or the like (step S4).
2).

The user inputs a request for information display to terminal 510 at an arbitrary time at which the user wants to view information (step S42). The terminal 510 to which the display request has been made displays the information stored in the built-in memory (step S44).

Since the amount of information provided by the information providing station is very large, it takes a very long time to transmit the information on the PHS line. Here, SDL line and P
It is assumed that the transmission speed ratio of the HS line is 1000: 1. Assuming that the information to be transmitted is the amount of information that can be transmitted in 10 seconds using the SDL line, 10,000 seconds /
It will take less than three hours. Therefore, information transmission using only the PHS line is not practical.

Therefore, in the present embodiment, a mode is adopted in which information acquisition is reserved using the PHS line, and information is automatically transmitted to the terminal 510 after entering the SDL area. As a result, it is possible to provide information in which images, sounds, and the like are mixed, and it is possible for the user to acquire information without being conscious of the SDL area.

(Sixth Embodiment) A sixth embodiment will be described.

In the fifth embodiment, information is transmitted using the SDL line regardless of the type of information. However, the information obtained from the information providing station has a relatively small amount of information depending on the type.

In this embodiment, information is divided into two layers by the information providing station. One is primary information of an amount of information that can be sufficiently transmitted by the PHS, and the other is secondary information that takes a long time if not transmitted by SDL.

[0098] The primary information is text data or the like representing the outline of the information, and the secondary information includes detailed drawings and moving images.

In the information providing station and the communication network, of the information requested by the terminal, only the corresponding primary information is immediately transmitted to the terminal using the PHS line. The terminal displays the received information to the user. If the user obtains the information desired by the user only with the primary information, the user is notified of the fact to the communication network / information providing station and the communication is terminated. If the user wants more detailed information, it notifies the communication network / information provider of the fact and obtains information using the SDL line.

[0100] The information to be provided is very often covered by the primary information. In this case, if information is provided using the SDL line, extra communication is performed, and efficient use of frequency is hindered. And the terminal consumes useless power.

By providing the primary information using the PHS line, the user can quickly obtain the information.
By providing the secondary information using the SDL line, it becomes possible to provide information such as a moving image and a high-definition image.

In this case, in the terminal, the primary information is displayed on the screen, and a display asking whether to acquire the detailed information using the SDL line (button in the window system)
If the terminal is automatically set to a standby state for receiving the SDL area by clicking the display, the operation of the user is further simplified.

(Seventh Embodiment) A seventh embodiment will be described.

In the sixth embodiment, the primary information transmitted by the PHS and the secondary information transmitted by the SDL are fixedly determined in advance by the information providing station. In this case, the secondary information cannot be received unless it crosses the SDL area at all.

Therefore, in this embodiment, time, PHS / SD
All the line usage charges of L are converted into costs, and information is transmitted on both the PHS and SDL lines so as to minimize the cost.

For example, the importance of secondary information is finely divided according to the type of the information. If a coarse image is sufficient for the image information, P takes a certain amount of time.
It is also possible to transmit by HS.

When the user desires to obtain the secondary information,
The information providing station calculates the cost sequentially and divides the information into PHS and SDL to provide the information so as to minimize the cost. With the passage of time, the cost of the information having high importance is set to increase, and with the passage of time, the usage fee of the PHS line is given a small weight, and it is regarded as the cost of the PHS.

As a result, when time elapses and secondary information cannot be transmitted without the terminal entering the SDL area, a portion of the secondary information having a high degree of importance is transmitted to the terminal via the PHS. Is displayed to the user.

The cost is calculated as in the present embodiment, and PH is calculated.
By separating the information transmitted in S and SDL, the user can always obtain valid information.

FIGS. 7 and 8 show an embodiment showing the installation location of the SDL area (service area by SDL). In the above embodiment, it is assumed that the user moves,
Information cannot be provided without passing through the SDL area with the movement. This problem is solved by setting the SDL area to a place where the user has a high probability of passing along with the movement.

For example, if an SDL area is set at the entrance of a company or the entrance of a room, a user crosses this area at least several times and information is provided. In FIG. 7, PHS
The base station 23 covers one room, and the SDL base station 21
Is installed near the entrance 22 and the area 21 is the entrance 2
It is arranged so as to cover all the people who use 2.

With such an arrangement, information can be obtained after a certain period of time.

FIG. 8 shows an example of installation in a corridor. If the SDL area 21 is set up so that a person who passes through the corridor always crosses, reliable information transmission becomes possible.

Based on the same concept, ticket gates at stations, entrances and exits of stations, toll gates on expressways, specific locations on arterial roads,
The information acquisition rate can be improved by installing the SDL area in a place where the user crosses or has a high probability of dropping in, such as an escalator getting on / off place and a toilet.

In the above embodiment, the user inputs an information request to the terminal in advance and automatically obtains this request item from the communication network when the terminal enters the communication area. For regularly published information such as newspapers and magazines,
By regularly registering the request items, it becomes possible for the user to obtain information without having to input an information request.

[0116] For example, when a specific newspaper is
When subscribing for a month, make a contract with a newspaper information provider and register. The user does not input a newspaper information acquisition request to the terminal. A user goes to work with a portable terminal. An SDL area will be provided at the ticket gate of the station on the way to work.

Thus, when the user passes the ticket gate of the station, the newspaper information of the day can be automatically transmitted to the portable terminal. The transmission procedure is the same as in the above-described embodiment. The terminal notifies the user of the completion of the information acquisition by sound, light, or vibration. As a result, the user can read an article in the newspaper using the mobile terminal on the platform of the station or on the train.

As described above, the registration and registration of a certain section
By making a reservation, it is possible to omit input to the terminal.

By the way, there is an attempt to realize an electric newspaper delivery service by connecting a high-speed wired line to each home. This is to draw optical fiber to each home and to perform various services by using this high-speed line.

However, this requires enormous costs for infrastructure development to each home, and usually requires telephone or FA.
There are some unacceptable general households that use only services such as X.

According to the present invention, since the present invention can be implemented by providing an SDL area at a specific location, there is no need to provide a special infrastructure for each home. Then, the user only has to purchase the terminal, and the communication network only has to arrange several wireless base stations at a specific place such as a ticket gate of a station.

As described above, by providing the SDL area at a specific location, it is possible to realize an advanced information providing service without excessive capital investment.

The invention shown in the above embodiments is as follows.

[1] First, there is provided a system including a communication network, a radio base station connected to the communication network, an information providing station connected to the communication network, and a portable terminal. In a wireless communication system in which the portable terminal is connected by a wireless line via a wireless base station and issues an information acquisition request to receive information corresponding to the request from an information providing station, Means for detecting that the mobile terminal is located in an area capable of wireless communication with the wireless base station, and when acquiring information from the information providing station using the portable information terminal, the user of the terminal is optional At the time, the mobile terminal makes an information acquisition request to the terminal, and the portable terminal automatically enters the requested information upon entering the area communicable with the wireless base station. It is obtained dynamically.

In the case of this configuration, the terminal user makes an information acquisition request to the terminal at an arbitrary time. When the terminal moves with the terminal, when the terminal detects that it has entered an area where wireless communication is possible, it automatically makes a call, establishes a wireless communication line, and requests an information acquisition to the communication network. Is transmitted, the request item is transmitted to the communication network side, the communication network transmits the request item and the like to the information providing station, and transmits the information provided from the information providing station to the terminal according to the request by radio. .

As a result, a wireless communication system is provided in which the user can receive necessary information without being aware of the wireless service area.

[2] Second, a system comprising a communication network, a radio base station connected to the communication network, an information providing station connected to the communication network, and a portable terminal, wherein the communication network The portable terminal is connected by a wireless line via one or a plurality of wireless base stations, and the wireless base station and the portable terminal communicate with each other at a first transmission rate at a first downlink and a first downlink.
At least a second downlink transmitting at a second transmission speed higher than the transmission speed of the first and a radio transmission line of an uplink transmitting at a transmission speed equivalent to the first transmission speed. In a wireless communication system in which the communicable area of the downlink and the uplink is wider than the communicable area of the second downlink, the portable terminal enters the area where the second downlink can communicate. Means for detecting information from the information providing station using the portable terminal, when the user of the terminal makes an information acquisition request to the terminal at any time, the portable terminal Is characterized by automatically acquiring information requested by entering the second downlink communicable area through the second downlink.

In the case of this configuration, in addition to the operation and effect of [1], a second service area having a narrow service area capable of high-speed transmission is provided.
Information can be obtained by high-speed transmission when the user enters the area of the downlink.

As a result, the user can receive necessary information without being conscious of the wireless service area, and can acquire even a large amount of data in a short time. Is obtained.

[3] Thirdly, in the second configuration, the portable terminal transmits an information acquisition request by a user to the second terminal.
Irrespective of whether or not it is located in a communicable area of the downlink, the network is notified using the uplink and the first downlink.

As a result, in addition to the effects of [1] and [2], it is possible to make an information acquisition request at any time.

[4] Fourth, in the configuration of the above [2], the portable terminal obtains information also through the first downlink.

As a result, in addition to the effects of [1] and [2], information can be obtained at any time.

A user who accesses an information providing station does not always want to obtain information in real time. For example, when you come to work, you want to know the contents of the morning's publication that day, but you do not need that information before leaving the house and heading for the station, but rather while waiting for the train at the station or on the train. It becomes.

In this system, the user inputs the information he or she wants to a terminal carried by the user at an arbitrary time when he or she wants the information. Terminal is stored of the data in advance what kind of information can be acquired, to check whether information requesting that accessible, notifies the possible users. The user ends the terminal operation when the registration is completed.

The terminal observes whether it is located in an area where wireless communication is possible. As an example of the observation, a method of outputting a specific frequency carrier on the base station side, observing the carrier frequency, and performing carrier sensing as to whether or not the carrier has a predetermined electric field strength or more is given as an example.

When the terminal detects that it has entered the area where wireless communication is possible, it automatically makes a call and establishes a wireless communication line. The terminal notifies the communication network that there is an information acquisition request, and transmits the request item. The communication network transmits request items and the like to the information providing station, and transmits request information from the information providing station to the terminals wirelessly. The terminal notifies the user of the completion of the information acquisition using a lamp or a buzzer.

As described above, when it is detected that the terminal has entered the area where wireless communication is possible, a call is automatically made to establish a wireless communication line and notify the communication network that there is an information acquisition request. Then, the request item is transmitted to the communication network side, and the communication network transmits the request item to the information providing station, and transmits the information provided from the information providing station to the terminal in accordance with the request by wireless. Thus, a wireless communication system is provided in which a user can receive necessary information without being aware of a wireless service area.

Therefore, according to the present invention, since the terminal detects that the terminal has entered the wireless communication area and automatically obtains information, the user can provide an advanced information providing service without being conscious of the wireless communication area at all. Can be enjoyed.

The above is the embodiment of the radio communication system capable of rational information acquisition. In a wireless communication system, a receiving circuit for high-speed transmission is required in a terminal as a communication transmission speed increases. A receiving circuit for high-speed transmission requires high power consumption during operation, and a battery problem is great for a terminal (wireless terminal device) carried by an individual because it is necessary to secure battery capacity.

Further, as in the above-described embodiment, in order to be able to acquire information without being conscious, the terminal must always be in the operating state, and the battery is consumed unnecessarily. Therefore, power saving measures are important.

Accordingly, an embodiment of the present invention will be described from the viewpoint of power saving.

First, the battery saving method of the wireless communication system will be described.

Terminal (wireless terminal device) like mobile communication
Is portable, it is difficult to always connect and operate the power supply with a wire, and therefore, generally, a battery is mainly used as the power supply. When making a call from the wireless terminal device, it is sufficient to turn on the switch each time, but when making a call, it is not decided when the call will occur, so it is necessary to always activate the receiving circuit is there. However, since the power consumed for this purpose consumes the battery, there is a problem that the waiting time for incoming calls is short and limited.

As a conventional technique for solving this problem, there is intermittent reception. In this method, the receiver circuit is not always started, but the receiver circuit is started at a certain time interval to perform carrier sensing, and if there is no received wave, the power of the receiver circuit is turned off again until the next start time. Thus, battery saving has been performed. However, even if the operation is intermittent, power consumption does not become ridiculous in a device having a large operating power.

In addition, intermittent reception is performed outside the effective wireless zone of communication, and even in spot transmission where the coverage area is local, the intermittent reception is simply performed without determining the inside or outside of the area. Therefore, even when the communication is invalid, the receiving circuit is activated and power is consumed.

To save the battery, there is a method of reducing the power consumption of each device and the like, but it is difficult to reduce the power consumption very much as it is. Also PH
In a communication method using a micro cell such as S, a location registration packet must be transmitted to the wireless base station as the location registration area moves, and the power consumption for this also shortens the battery life. was there.

Furthermore, with the development of mobile communication systems in recent years, communication at a high transmission rate has been demanded.
Transmission and reception at a high transmission rate consumes large power. Even if intermittent reception is performed, the power consumption of the receiving circuit is not small, and there is a demand to reduce the activation of the receiving circuit as much as possible for battery saving.

[0149] However, if the activation interval of the receiving circuit is set too long, if a broadband communication service is performed in a spot manner, there is a possibility that the reception area will pass through with the power turned off. Service problems, such as a longer waiting time before the service is completed.

In this embodiment, it is possible to operate a wireless terminal device with low power consumption for reception at high speed transmission.

The battery saving method of the wireless terminal device according to the following embodiment enables battery saving without impairing service quality by minimizing the operation of a wideband wave receiving circuit that consumes a large amount of power. Yes, in the wireless terminal device, in addition to the wideband wave receiving circuit, a reception detecting unit with lower power consumption by a narrow band wave or the like is provided, and when the reception by the wideband wave is not performed, the reception of low power consumption is performed. The detecting means detects the service in the broadband wave, and the power supply control unit operates the wideband wave receiving unit to perform reception. When it is not necessary to perform the wideband wave receiving operation, the wideband wave receiving circuit is stopped to perform battery saving, and will be described in detail below.

(Eighth Embodiment) The first embodiment of the battery saving method for a wireless terminal device according to the present invention will be described as an eighth embodiment. FIG. 12 is a block diagram illustrating a configuration of a battery saving system in the present embodiment.
FIG. 13 is a diagram for explaining the operation.

In FIG. 12, reference numeral 31 denotes a wireless terminal device. Reference numeral 32 denotes a power supply control unit; 33, a broadband wave receiving circuit that performs a receiving operation corresponding to a radio transmission wave that is a wideband wave;
Reference numeral 4 denotes a medium-band wave transmitting / receiving circuit that performs transmission / reception operation corresponding to a medium-band wave, reference numeral 35 denotes a narrow-band wave reception circuit that performs reception operation corresponding to a narrow-band wave, and reference numeral 36 denotes a power control unit 32
Power supply operation signals for operating the circuit from
Reference numeral 7c denotes an antenna corresponding to one or both of transmission and reception, and the wireless terminal device 31 is configured by these.

Reference numeral 36 denotes a power supply operation signal for operating the circuit output from the power supply control unit 32. The wide band wave reception circuit 33, the medium band wave transmission / reception circuit 34, and the narrow band wave reception circuit 35 By receiving the output power supply operation signal 36 addressed to itself, the circuit operation is enabled by receiving power supply from a power supply unit (not shown). In addition, the power supply control unit 32 generates and controls a power supply operation signal 36 for the wideband wave reception circuit 33, the medium band wave transmission / reception circuit 34, and the narrow band wave reception circuit 35 according to the situation, and controls these operations. Things.

The antenna 37a is for reception with respect to the broadband wave reception circuit 33, the antenna 37b is for transmission and reception with respect to the middle band wave transmission / reception circuit 34, and the antenna 37c is for transmission and reception with respect to the narrowband wave reception circuit 35. Antenna.

Next, the operation of the apparatus having the above configuration will be described with reference to FIG.
2. Description will be given based on FIG. In FIG. 13, components having the same numbers as those in FIG. 12 indicate the same configurations as those in FIG. The hatched blocks indicate that they are in operation.

When the power of the wireless terminal device 31 is turned on, the power control unit 32 enters an operating state. And the power control unit 3
2 controls the operation of the medium-band wave transmitting / receiving circuit 34, the wide-band wave receiving circuit 33, and the narrow-band wave receiving circuit 35 by controlling the power supply according to the situation.

Normally, at the time of standby during which communication is not performed, as shown in FIG. 13A, the narrow-band wave receiving circuit 35 and the power supply control unit 32 operate, and the wide-band wave receiving circuit 33 operates.
Also, the transmission / reception circuit 34 for the medium band wave is not operated. Since the narrow-band wave receiving circuit 35 and the power supply control unit 32 operate, the wireless terminal device 31 can respond to the call even if the wide-band wave receiving circuit 33 and the medium-band wave transmitting / receiving circuit 34 are not operating. Because.

That is, the incoming call operation is performed as follows. The wireless terminal device 31 is first called by a narrowband signal. Thus, the wireless terminal device 31 and the power supply control unit 32 can know what kind of call is made via the narrowband wave receiving circuit 35. When the communication of the middle band wave is called by the signal of the narrow band wave, the power supply control unit 32 sends a power supply operation signal of the middle band wave transmission / reception circuit 34 as shown in FIG.
When the power is turned on and the operation is started, transmission / reception using the middle band wave is performed.

FIG. 13C shows a second mode of the eighth embodiment, in which the broadband wave receiving circuit 33 and the medium band wave transmitting / receiving circuit 34 are activated by calling with a narrowband signal. .

The operation signal is transmitted from the power supply control unit 32 to the wide band wave receiving circuit 33 and the medium band wave transmitting / receiving circuit 34 by calling with a narrow band signal. The broadband wave receiving circuit 33 and the medium band wave transmitting / receiving circuit 34 operate using respective antennas 37a and 37b.

In general, the power consumption of each wireless device constituting the wireless terminal increases as the bandwidth increases. If the power per band is the same, a wide bandwidth consumes large power. Further, since the loss (loss) of each device or line increases as the frequency increases, more power is consumed as the frequency is increased to compensate for the loss.

Although transmission of a narrow band signal can be performed at a low frequency, transmission of a wide band signal uses a high frequency.
The transmission speed of the narrow band signal is 1-2 kbps, the middle band signal is 32 kbps, and the wide band signal is 155 Mbps. Although a narrow band signal can be transmitted in a band of several hundred MHz, it is difficult for a wide band signal to use this band because no other communication can be performed at all.
It has to be performed by the millimeter wave band such as the band. From the above relationship between bandwidth and frequency, reception of a narrowband signal can be performed with extremely low power, and reception of a wideband signal requires large power.

Therefore, as in this embodiment, the narrow band signal is used for call monitoring during standby, and in the standby state, the receiving circuit 33 for the wide band signal and the transmitting / receiving circuit 34 for the middle band signal are in the power-off state. And a receiving circuit 3 for a narrow band signal
Reference numeral 5 denotes an operation in a power supply state to enable monitoring of a call in a standby state, and a reception circuit 33 for a wide band signal and a transmission / reception circuit 3 for a medium band signal when a call is made.
By starting the power supply to the necessary ones and operating them, effective battery saving becomes possible.

(Ninth Embodiment) Another embodiment will be described.

In the asymmetric communication, a narrow-band wave line having a low transmission speed and a wide-band wave line having a high transmission speed are provided. As shown in FIG. Transmission is performed in a wide area A2, and data transmission on a line using a wideband wave is performed in a narrow area A7.
Do with. Now, it is assumed that the base station A6 is a call-only narrowband line that covers the wide area A7. This includes, for example, a pager.

The pager's calling area is very wide, such as a prefecture unit or a Kanto area. However, since users in that area must be accommodated in limited frequency resources, a low transmission rate (several 100 bps) is required. ~
Only transmission at several kbps) can be performed.

[0168] The medium-band wave transmission performs communication in a limited area, but a plurality of such areas are continuously arranged, and a user can communicate at any position while moving. This is provided by a technology called location registration. A plurality of base stations A1 are arranged, each having a small area A2, and these areas are designed to overlap. Examples include mobile phones and second generation cordless phones (PHS).

In PHS, a terminal that has entered an area notifies the base station that it is in this area, and the control station A
By registering the location in 3, a call from a communication network can be received. The zone radius will be several hundred meters to several kilometers,
Since it is only necessary to support the users existing in this area, higher-speed communication can be performed than a pager, and several tens of kbps
Transmission can be performed at about s to several hundred kbps.

[0170] Broadband wave transmission is a downlink-only line arranged in a spot manner, and each zone A4 is arranged in a spot manner, is not continuous, and is transmitted only when a user passes through that position. Can be performed. This area is installed on a ticket gate or a main road of a station that is likely to pass by a user, and its coverage is several meters to several tens of meters. High-speed communication is possible because data transmission is limited and the areas are far apart.
Data transmission at a high speed of about bps to 150 Mbps is possible. An example of such a broadband / spot area data transmission is an SDL system (Japanese Patent Application No. 06-137621).
No.).

In the conventional PHS, it is necessary to register the position of a relatively small area. This means that the radius of the area is several tens
Since the distance is from 0 m to several km, the area frequently changes when the terminal is moving, and the position has to be registered each time. Further, a method has been considered in which the area is divided into several groups and the location is registered only when the group is changed. However, in this method, the PHS has to be always turned on to discriminate the area group, and the received signal has to be demodulated.

According to the present invention, it is possible to completely turn off the power of the PHS / SDL when the PHS / SDL is in a standby state. At power-on, location registration is performed using the PHS. The normal location registration information is stored in the control station A3 that controls the PHS, and when calling using the PHS, an area is specified using the location registration information. In the present invention, the location registration information is notified to the control station that calls the pager, and the call is performed only by the pager. When the terminal performs location registration using the PHS at power-on,
The power of the HS is turned off, and the reception by the pager is performed.
As shown in FIG. 10, the pager has a mechanism for turning on the power only during a time when a signal addressed to the pager may be transmitted. This is called an intermittent reception technique and is widely and generally used.

The calling range of the pager is very wide, and once the location is registered, it does not frequently go out of the range unless the vehicle is traveling on a highway or moving on a bullet train. However, if you leave the range, you will not be able to receive calls. The normal pager is dedicated to incoming calls, the calling area is limited at the time of contract, and cannot be used anywhere else.

In this embodiment, this problem can be solved by performing location registration by PHS. For this purpose, the signal at the time position B1 in FIG. 10 at which the signal addressed to itself may come may be configured as shown in FIG.

A wide area ID indicating a pager calling area is added to the signal, and this is used. The terminal performs reception using a pager, looks at the wide area ID in the received information, compares it with the ID when it was registered in advance, and when it is determined that the terminal is clearly outside the expected area The power of the functional element of the PHS as a terminal is controlled so that the location registration is performed again.

As a result, the problem that the pager registered in the Tokyo area could not be used in Osaka or the like can be solved.

In the standby state of the pager, the functional elements of the PHS and the SDL as terminals are turned off (OFF).
Keep it.

Assume that a request for data transmission to a terminal by SDL is made on the communication network side. On the communication network side, the pager first calls the terminal. The called terminal is PH
S is turned ON, and the location of the PHS area is registered. This is because the communication network side has terminal position information enough to specify the wide area of the pager by previous position registration, but does not have position information with sufficient accuracy to perform PHS communication.

After establishing the PHS line by registering the location of the PHS area (PHS service area), the communication network notifies the terminal that there is a communication request using SDL. Thereafter, when the user enters the spot area (a service area using the SDL high-speed line), the SDL
For high-speed data transmission.

In the standby state of the conventional terminal, the battery saving is performed by performing the intermittent reception operation by the PHS. In the present invention, the higher battery saving effect is obtained by performing the intermittent reception by the pager. I made it.

Comparing the power consumption of the PHS and the pager in the standby state, the pager has an order of magnitude less. This is due to the respective transmission speed, the frequency band used, and the intermittent reception interval. That alone is the same as the one with a longer intermittent reception interval of the PHS,
In PHS, frequent location registration is required, whereas location registration for a pager only needs to be performed almost once at power-on, and the effect of a sharp decrease in the number of location registrations appears. The location registration operation has to perform transmission, and its power consumption is severe.

A combination of pager + PHS + SDL,
A remarkable battery saving effect can be obtained by exchanging information such as location registration information between the control stations.

In this embodiment, by intermittently performing reception during standby using only a narrow band signal, power consumption during standby can be significantly reduced, and more effective battery saving can be achieved.

(Tenth Embodiment) A tenth embodiment is a second embodiment of the battery saving system according to the present invention. FIG. 14 shows a schematic configuration, and FIG. 15 shows an operation. .

In FIG. 14, components denoted by the same reference numerals as those in FIG. 12 have the same configurations as those in FIG. 13
Reference numeral 1 denotes an infrared ray receiving unit for detecting infrared rays, and 132 denotes an infrared ray signal indicating that the infrared ray is within the broadband wave receiving area. In this embodiment, a power supply control unit 32 and a broadband wave receiving circuit 33 are provided, and a circuit for a narrowband wave and a medium band wave is not provided. In general, an infrared receiving unit that detects infrared light can be realized with extremely low power consumption. In this embodiment, attention is paid to this point, and infrared rays are used for waiting for a call.

Next, the operation of this embodiment will be described with reference to FIGS. The infrared receiving unit 131 of the wireless terminal device 31 operates with low power,
As shown in (a), the infrared receiving unit 131 and the power control unit 132
Operates, and the wideband wave receiving circuit 33 stops operating and is in a state.

In operation, as shown in FIG. 15 (b), the infrared receiving section 131 detects the infrared signal 132 and outputs an output to the power control section 32. The receiving circuit 33 is operated. The wideband wave receiving circuit 33 performs a receiving operation using the antenna 37a.

A monitoring circuit using infrared light can have a very low power consumption circuit configuration. Therefore, by adopting the infrared receiving method capable of realizing a circuit configuration with low power consumption for monitoring during standby, more effective battery saving becomes possible.

Since infrared rays are used, the wireless communication device 31 on the terminal side needs to be provided with an infrared ray sensor. This sensor is attached to the collar or pocket of the clothes worn by the user carrying the terminal. Or, it may be used by attaching it to the outside of the bag with a clip or the like.

(Eleventh Embodiment) FIGS. 16 and 17
FIG. 9 is a diagram showing a schematic configuration and operation according to a third embodiment of the battery saving method.

In FIGS. 16 and 17, the components denoted by the same reference numerals as those in FIG. 14 have the same configuration. In this embodiment, a narrowband wave receiving circuit 151 is provided as shown in FIG. 16 instead of the infrared receiving section 131 in the configuration of FIG. The narrow-band wave receiving circuit 151 is a circuit that performs reception processing (reception operation) of a narrow-band wave.

Next, the operation of this embodiment will be described with reference to FIG.
A description will be given based on (a) and (b). In a place where a wideband wave service is available, a specific narrowband wave indicating this is broadcast (transmitted). In the standby mode, as shown in FIG.
1 and the power supply control unit 2 only operate, and the narrowband wave receiving circuit operates with lower power than the wideband wave receiving circuit.

At a place where a wideband wave can be received, the narrowband wave receiving circuit 151 performs reception processing of the narrowband wave, and the power supply control unit 32 detects the reception of the narrowband wave from the reception output from the narrowband wave receiving circuit 151. Wideband receiving circuit 33
Is supplied to the broadband receiving circuit 33 in order to operate. Then, the wideband receiving circuit 33 receives power and starts operation, thereby performing a wideband wave receiving operation.

As described above, in the present embodiment, the power supply of the broadband wave receiving circuit is turned off and the power supply of the narrowband wave receiving circuit is turned on during standby, so that the narrowband wave receiving circuit monitors the radio waves of the narrowband wave. When a call is received using a narrowband radio wave, the power supply control unit turns on the wideband wave receiving circuit and starts operation, so that the operation is performed with low power consumption during standby. Since it is operable, a high effect is obtained for battery saving.

(Twelfth Embodiment) The twelfth embodiment is the fourth embodiment of the battery saving system.

FIG. 18 and FIG. 19 are diagrams showing a schematic configuration and operation according to this embodiment.

In FIG. 18, components denoted by the same reference numerals as in FIG. 12 have the same configuration. In the figure, 71 is an inductive coupling coil as a sensor, and 72 is an amplifier for amplifying the output of the inductive coupling coil 71.

In FIG. 19, 31 is a wireless terminal device, 81 is an electromagnetic induction device installed in an area where wideband wave reception is possible, and an electromagnetic induction device is provided in the inductive coupling coil 71 built in the wireless terminal device 31. It is for generating a signal by induction. That is, the inductive coupling coil 71 and the electromagnetic induction device 81 incorporated in the wireless terminal device 31 have matching coupling characteristics, and the electromagnetic induction device 81 is always supplied with power, and a signal is supplied to the inductive coupling coil 71 by electromagnetic induction. Can be generated.

Next, the operation will be described. Outside the wideband wave receivable area, the function of each component in FIG. 18 is stopped. In the wideband wave receivable area, FIG.
Is provided, and a user of the wireless terminal device can connect the wireless terminal device 31 to the electromagnetic induction device 8.
Move along 1.

The electromagnetic induction device 81 is always supplied with AC power, and a current flows through the induction coupling coil 71 due to the electromagnetic induction effect between the induction coupling coil 71 of the wireless terminal device 31 and the electromagnetic induction device 81. The amplifier 7
2 and transmitted to the power control unit 32. The power supply control unit 32 detects that a signal from the amplifier 72 has entered the broadband wave receivable area, and converts the power supply operation signal 36, which is a control signal acting to turn on the power supply of the wideband wave receiving circuit 33, to the wideband wave. By transmitting the signal to the wave receiving unit, the power of the wideband wave receiving circuit 33 is turned on, and the wideband wave is received via the antenna 37a.

As a result, there is no power consumption in the receiving circuit or the transmitting / receiving circuit outside the wideband wave receivable area, so that there is a high effect on battery saving. This embodiment is particularly effective when installed in, for example, a ticket gate at a station.

(Thirteenth Embodiment) The thirteenth embodiment is another embodiment of the battery saving system, and suppresses useless power consumption of the wideband wave receiving circuit while operating in the middle band. This is the battery saving method described above, and will be described with reference to FIGS.

FIGS. 20A and 20B show a schematic configuration according to the twelfth embodiment.

In FIG. 20, components denoted by the same reference numerals as those in FIG. 12 have the same configurations as those denoted by the same reference numerals in FIG. In the figure, reference numeral 91 denotes a base station for a medium band which is a radio base station which communicates with a medium band wave, and 92 denotes a base station for a wide band which is a radio base station which communicates with a wide band.

FIG. 21 is an explanatory diagram of the operation of this embodiment.

In FIG. 21, reference numeral 101 denotes a broadband wave reception start identification code, and reference numeral 102 denotes a wideband wave reception end identification code. The reception start identification code 101 and the reception end identification code 102 are sent by the base station 91 for the medium band wave, and the medium band reception circuit 34 performs reception identification of these codes, and based on the result of the reception identification, the power control unit 32 The power supply operation signal 36 is controlled to control on / off of the power supply of the wideband wave receiving circuit 33. Therefore, the middle band wave receiving circuit 3
4 has an identification function of a reception start identification code 101 and a reception end identification code 102.

Next, the operation of this embodiment will be described with reference to FIG.
A description will be given based on (a) and (b) and FIG. FIG.
At 0 (a), it is assumed that the wireless terminal device 31 can receive at least both the radio waves of the base station 91 of the medium band wave and the base station 92 of the wide band wave.

In FIG. 20B, during standby, the middle band wave receiving circuit 34 and the power supply control unit 32 are operating, and the medium band wave receiving circuit 34 has received and identified the reception start identification code 101 of the wide band wave. In the case, the power control unit 3
2 controls the broadband wave receiving circuit 33 to be turned on, as shown in FIG.

Next, when the middle-band wave receiving circuit 34 has received and identified the reception end identification code 102 of the wide-band wave, the power supply control unit 32 sets the wide-band wave receiving circuit 3 as shown in FIG.
The power of No. 3 is turned off to stop the operation.

[0210] Thus, it is possible to suppress useless power consumption of the wideband wave receiving circuit while operating in the middle band wave, and a high effect on battery saving is obtained.

(Thirteenth Embodiment) In the thirteenth embodiment, when time-division multiplexing is performed on a wideband wave, the operation timing of the wideband wave receiving circuit is controlled by using the medium band wave. The operation of the wideband wave receiving circuit other than the receiving slot is stopped to save battery power.

FIG. 22 is an explanatory diagram of the operation of the battery saving method according to this embodiment. In FIG. 22, components denoted by the same reference numerals as those in FIG. 21 are the same as those in FIG. 111A and 111B are timings of data transmitted by a wideband wave. The device configuration of the thirteenth embodiment is the same as the configuration described in the twelfth embodiment.

Next, the operation of the thirteenth embodiment will be described with reference to FIG.
2 will be described. As in the twelfth embodiment, the middle band receiving circuit 34 identifies the reception start identification code 101 of the wide band wave, so that the power control unit 32
The power of the broadband wave receiving circuit 33 is controlled to be turned on, and the broadband wave receiving circuit 33 is operated.
The power supply of No. 3 is controlled to be turned off and stopped, as follows.

The reception start identification code 101 and the reception end identification code 102 are sent by the base station 91 for the middle band wave, and the middle band wave receiving circuit 34 performs the reception identification of these codes and, based on the result of the reception identification, the power supply control. The power supply operation signal 36 is controlled by the section 32 and the broadband wave receiving circuit 3 is controlled.
3 is controlled to turn on and off.

In the present embodiment, it is assumed that time-division multiplexing is performed in a wideband wave. Therefore, the operations of the middle band wave receiving circuit 34 and the wideband wave receiving circuit 33 are synchronized, and the base station apparatus The 91 side transmits the reception start identification code 101 in the middle band wave just before the wide band wave data 111 and makes the middle band wave receiving circuit 34 of the communication terminal device 31 receive the same. Immediately after the transmission of the data 111 is completed, the reception end identification code 102 is transmitted from the base station apparatus 91 side as a medium band wave and transmitted to the communication terminal apparatus 31.
, The broadband wave receiving circuit is operated only at a certain time of data.

When time-division multiplexing is performed on a wideband wave, the operation timing of the wideband wave receiving circuit is controlled by using the medium band wave, so that the operation of the wideband wave receiving circuit other than the reception slot is stopped. Can have a high effect on battery saving.

(Fourteenth Embodiment) In the fourteenth embodiment, when a wideband wave is transmitted as a packet, the wideband wave reception start identification code is transmitted as a middle band wave in accordance with the packet transmission timing. Power on the receiving circuit 33,
By transmitting a broadband wave reception end identification code at the end of the packet, the broadband wave reception circuit 33 identifies the same and turns off its own power supply, thereby saving the battery.

Alternatively, by synchronizing the reception timings of the middle band wave and the wide band wave and transmitting the wide band wave reception start identification code 101 received by the middle band wave immediately before the wide band wave data, time division multiplexing is performed on the wide band wave. This is an example in which battery saving is performed by stopping the operation of the wideband wave receiving circuit in a slot other than the wideband wave receiving slot when the operation is performed.

FIGS. 23 and 24 show a fourteenth embodiment of the present invention.
FIG. 6 is a diagram showing an example of a battery saving method according to the example of FIG.

In FIG. 23, components denoted by the same reference numerals as those in FIG. 21 have the same functions as those in FIG. In the figure, reference numeral 121 denotes data transmitted by a broadband wave;
2 is a data code indicating the end of data transmission. In the example shown in FIG. 23, the broadband wave receiving circuit 33 has a function of turning off its own power when the broadband wave receiving end identification code 122 in the packet is identified.

Further, in the example of FIG. 24, the reception timings of the middle band wave and the wide band wave are synchronized, and the wide band reception start identification code 101 received by the middle band wave is transmitted immediately before the wide band wave data. The broadband wave reception end identification code 102 is transmitted immediately after the end of the broadband wave data, and these are identified by the middle band wave reception circuit 34, so that the power supply of the wideband wave reception circuit 33 is controlled on / off via the power supply control unit 32. Configuration.

Next, the example of FIG. 23 will be described. In FIG. 23, during standby, the reception circuit 34 for the medium band wave is operating, but the reception circuit 33 for the wide band wave is in a power-off state.

The operation of the reception circuit 34 for the middle band wave is not always continuous as shown in FIG. 23, and includes a case where the reception operation is performed intermittently in time to save power consumption.

The medium band base station 91 transmits the broadband wave reception start identification code 101 in the medium band, and
2 sends a packet with a broadband wave reception end identification code 122 at the end of the broadband wave transmission data.

On the terminal device 31 side, the reception circuit 3 for the middle band wave
4 detects the broadband wave reception start identification code 101, the identification output is supplied to the power supply control unit 32.
, And the broadband wave receiving circuit 33 starts reception as indicated by reference numeral 103 in the figure.

At the end of the transmission data of the broadband wave, a packet with the broadband wave reception end identification code 122 is attached. When the wideband wave receiving circuit 33 detects this,
As shown by the reference numeral 104 in the figure, the self (the broadband wave receiving circuit 33) immediately stops its operation and turns off the power.

In the case of the example of FIG. 24, the reception timings of the middle band wave and the wide band wave are synchronized, and the base station 91 of the middle band wave transmits the wide band wave reception start identification code 101 immediately before the wide band wave data. . This is identified by the middle band wave receiving circuit 34 of the terminal device 31, and the power of the wide band wave receiving circuit 33 is turned on via the power supply control unit 32.

Also, the base station 91 for the medium band wave transmits the wide band wave reception end identification code 102 immediately after the end of the wide band wave data. This is connected to the middle band wave receiving circuit 34 of the terminal device 31.
The power of the broadband wave receiving circuit 33 is controlled to be turned off via the power control unit 32 by the identification.

Thus, by synchronizing the reception timings of the middle band wave and the wide band wave and transmitting the wide band wave reception start identification code 101 received by the middle band wave immediately before the wide band wave data, time division multiplexing is performed on the wide band wave. Is performed, the operation of the broadband wave receiving circuit other than the broadband wave receiving slot can be stopped, which has a high effect on battery saving.

As described above, in order to achieve power saving, the present invention provides: [i] First, as a battery saving method for a wireless terminal device, a receiving circuit for receiving a wireless transmission wave at a first transmission rate; A transmitting / receiving circuit for transmitting and receiving a radio transmission wave at a second transmission speed lower than the first transmission speed; and a transmission / reception circuit for transmitting and receiving a radio transmission wave at a third transmission speed lower than the second transmission speed. A receiving circuit for performing reception, a receiving circuit for receiving a wireless transmission wave at a first transmission rate, and a wireless transmission at a second transmission rate based on information of a signal received by the receiving circuit for a wireless transmission wave at the third transmission rate. And a control unit having a function of turning on and off the power of the wave transmission / reception circuit, provided in the wireless terminal device, and in a state in which reception at the first and second transmission speeds is a standby state, the radio transmission wave of the third transmission speed is provided. Operating only the receiver circuit of , Characterized in that turns off the power of the transmission and reception circuit of the radio transmission waves of the first and second transmission speed preserve battery life.

The battery saving method of the wireless terminal device according to the present invention operates with a low-power-consumption receiving circuit that operates steadily, a power-on / off section of a receiving circuit that operates with a wideband wave, and operates with a medium-band wave. A wireless terminal device includes an on / off unit for a power supply of a transmission circuit and a power supply control unit for controlling on / off of a power supply of a broadband wave reception circuit or a medium band wave transmission / reception circuit based on information received by the low power consumption reception circuit. ,
If the information from the narrowband wave receiving circuit requires reception of the wideband wave, turn on the power of the wideband wave receiving circuit,
Turn off if not required.

In general, the power consumption of each wireless device constituting a wireless terminal device increases as the bandwidth increases. If the power per band is the same, a wide bandwidth consumes large power. Further, since the loss (loss) of each device or line increases as the frequency increases, more power is consumed as the frequency is increased to compensate for the loss.

Although transmission of a narrow band signal can be performed at a low frequency, transmission of a wide band signal uses a high frequency.
The transmission speed of the narrow band signal is 1-2 kbps, the middle band signal is 32 kbps, and the wide band signal is 155 Mbps. Although a narrow band signal can be transmitted in a band of several hundred MHz, it is difficult for a wide band signal to use this band because no other communication can be performed at all.
It has to be performed by the millimeter wave band such as the band. From the above relationship between bandwidth and frequency, reception of a narrowband signal can be performed with extremely low power, and reception of a wideband signal requires large power.

In the battery saving method of the wireless terminal device according to the first aspect of the present invention, the narrow-band wave receiving circuit is operated for normal calling, and the wide-band and medium-band wave transmitting / receiving circuits are turned off. When the narrow-band reception circuit detects a call signal of the terminal, the power supply control unit turns on the power of the wide-band wave reception circuit and the medium-band wave transmission / reception circuit, and performs the reception operation in the wide-band wave and the mid-band reception. Performs transmission and reception operations on waves. When the communication in the broadband wave or the middle band wave is completed, the power supply of the wide band wave receiving circuit or the middle band wave transmitting / receiving circuit is turned off again. According to the present invention, by performing reception at the time of standby using only the narrowband signal, only the reception circuit of the narrowband wave can be operated at the time of standby, and the battery can be saved while suppressing power consumption.

[Ii] Secondly, the battery saving method of the wireless terminal device according to the present invention comprises a receiving circuit for receiving a wireless transmission wave of a first transmission speed, a receiving circuit having a lower speed than the first transmission speed. A transmission / reception circuit for transmitting and receiving a wireless transmission wave at a second transmission rate; a detecting unit for identifying that the wireless terminal device is capable of receiving the wireless transmission wave at the first transmission rate; A power control unit having a function of turning on and off a power supply of a receiving circuit for at least a wireless transmission wave at a first transmission rate by the detection means, provided in the wireless terminal device, and a communication service at the first transmission rate is provided. In a place where there is no communication, the power of the receiving circuit for the wireless transmission wave at the first transmission rate is turned off to prevent battery consumption, and in a place where a communication service at the first transmission rate is performed, the detection means is provided by the detection means. The detects that it is within the A 1
Reception at a transmission speed of

In this battery saving method, a means for detecting whether or not a broadband wave communication service can be used is normally operated, and a broadband wave receiving power supply is turned off. If the possibility is detected, the power supply control unit turns on at least the power of the broadband wave receiving circuit and performs the receiving operation with the wideband wave. After the reception of the wideband wave is completed, the power control unit turns off at least the power of the broadband wave receiving circuit.
According to the present invention, the power supply of the wideband wave receiving circuit is turned off when the wideband wave service is not performed, and the wideband wave detecting means uses a means with low power consumption so that the service quality is not impaired. Saving becomes possible.

[Iii] Third, the battery saving method of the wireless terminal device according to the present invention comprises a receiving circuit for receiving a wireless transmission wave of a first transmission speed, a receiving circuit having a lower speed than the first transmission speed. A transmission / reception circuit for transmitting and receiving a radio transmission wave at a second transmission rate, and turning on / off a power supply of a reception circuit for the radio transmission wave at the first transmission rate in accordance with information received at the second transmission rate. A power control unit having a function is provided in the wireless terminal device, and the power control unit uses the identification signal transmitted to the wireless terminal device at the second transmission rate immediately before the reception service at the first transmission rate is performed. A receiving circuit for the wireless transmission wave at the first transmission rate is activated, and the receiving circuit for the wireless transmission wave at the first transmission rate is stopped immediately after the reception service at the first transmission rate ends. .

In this battery saving method, the reception circuit for the medium band wave is normally operated and the reception power for the wide band wave is stopped. A code indicating the start is inserted, and when a code indicating the start of reception of the broadband wave is detected in the reception information in the middle band wave, the power supply control unit starts the power supply of the reception circuit of the wide band wave, Performs receiving operation in a wideband wave. When the reception of the broadband wave is completed, the power supply control unit stops the power supply of the broadband wave receiving circuit. In the present invention, when the information of the wideband wave is intermittently transmitted, the power of the wideband wave receiving circuit is stopped while the wideband wave information is not transmitted, so that the battery can be saved without deteriorating the service quality. Become.

Therefore, according to the battery saving method of the wireless terminal device of the present invention shown in the eighth to fourteenth embodiments, the operation of the wideband wave receiving circuit that consumes a large amount of power is minimized, whereby the service is provided. Battery saving is possible without sacrificing quality.

[0240] In the above example, the battery was saved in the standby state. In each case, a wideband line and a narrower line were used, and the wideband line was used only when necessary. Like using a transmission,
It controls the power supply of the broadband receiving circuit and cannot be applied to existing systems as it is.

In high-speed wireless communication using a spot wireless zone (a narrow range of service area) that does not have such a system, intermittent reception is required in a wideband receiving circuit in order to reduce power consumption during standby. .

However, if the period of the intermittent reception is set to be long, it is very effective for saving power consumption. However, since the spot radio area is small, the terminal may be out of the area before the reception of high-speed radio data is completed. May move or data may not be received at all. In addition, if the period of the intermittent reception is shortened, the above problem does not occur, but the effect of battery saving cannot be sufficiently obtained. An embodiment for solving this will be described below.

The mobile communication terminal performs intermittent reception for battery saving, and the conventional intermittent reception is performed by turning on and off the power of the receiver at regular intervals.

In recent years, LAN (Local Area Ne)
With the increase in transmission speed of network (work), it has been required to increase the speed of wireless LAN. Even outdoors, high-speed wireless data communication in a spot area has been considered. For example, FTTC (Fiber-To-Th)
For the transmission at the end of e-Curb), it is conceivable to realize data communication by high-speed wireless communication in a spot area, or to realize high-speed wireless transmission of traffic information on a road or an expressway in a spot area. ing.

FIG. 25 shows an example of implementation of these systems. The mobile terminal 1105 performs high-speed communication with a spot wireless zone (spot wireless area) 1042 in which the mobile terminal 1105 is located.

In the terminal 1105 used in such a mobile communication system, the receiver used in the wide area wireless area 1041 and the receiver used in the spot wireless area 1042 are different because the transmission rate of the data to be received is different. A receiver is used. Even in such a system, intermittent reception must be performed in order to save battery power.

In particular, since a receiver used in a spot wireless area must receive high-speed wireless data, its power consumption is much larger than a receiver used in a wide area wireless zone. Therefore, battery saving by intermittent reception is effective.

In the above-described conventional intermittent reception, that is, when the receiver used in the spot wireless area is operated by turning on / off the power of the receiver at regular intervals, the battery must be set to a large period. No saving effect is obtained.

On the other hand, if the intermittent reception period is set to be large because the area of the spot radio area is small, the power of the receiver is not turned on in the spot radio area but crosses, and high-speed data cannot be received at all. Cases arise. Also, even if the power of the receiver is turned on in the spot wireless area, all high-speed data is not received,
There is a case where the terminal goes out of the spot wireless area. If the period of the intermittent reception is shortened in order to prevent this, there is a disadvantage that the effect of battery saving cannot be sufficiently obtained.

Therefore, a high-speed data receiver that consumes a large amount of power is turned on only when it enters a large wireless zone including a small wireless zone so that very efficient battery saving can be realized. In order to solve the above-mentioned drawback, it is possible to extend the standby time of the portable terminal, and the details will be described below.

(Fifteenth Embodiment) FIG. 25 shows a system configuration diagram for implementing the present invention. In the system shown in the figure, the base station 1101 is connected to the antenna 1102 in the wide area wireless zone 1.
041 is formed. The wide area wireless zone 1041 is several hundred k
Transmission / reception with a portable terminal is performed at a transmission speed of bps to several Mbps. The antenna 1103 forms a spot wireless zone 1042 having a radius of 1 meter to tens of meters in the wide area wireless zone 1041.

In the spot radio zone 1042, information is transmitted to the terminal at a transmission rate of several tens Mbps to one hundred and several Mbps.

A method for obtaining information desired by a user using a portable terminal in such a system will be described.

The portable terminal 1105 is in the wide area wireless zone 10
In step 41, the information requested by the user is transmitted to the base station 1 using the uplink radio channel of the wide area radio zone 1041.
Request to 101. The information requested by the base station 1101 is transmitted to the terminal 110 using the spot radio zone 1042.
Send to 5. At this time, the portable terminal 1105 notifies the base station 1101 that it has entered the spot wireless zone 1042. The base station 1101 transmits information to the portable terminal 1105 in the notified spot wireless zone 1042.

Hereinafter, more specifically, the portable terminal 1105
A method for receiving information requesting information in the spot wireless zone 1042 will be described.

FIG. 26 shows a configuration diagram of the terminal. Antenna 2
01, the signal of the wide area wireless zone 1041 is received.
The received signal is subjected to band limiting, amplification,
The signal is down-converted, and the reception field strength measurement unit 203 measures the reception field strength. The down-converted signal is demodulated by the modem 204 and the control data is transmitted to the controller 2.
At 05, the user data is passed to the user interface.

The result measured by reception electric field strength measurement section 203 is passed to determination section 206. The determination unit 206 determines whether a mobile terminal has entered the area of the wide area wireless zone 1041 based on the strength of the received electric field strength. Judge by strength.

That is, the strength of the received electric field strength is measured, and it is determined based on the fact that the measured received electric field strength has reached the strength level when the mobile terminal is in the service area. If the measured reception electric field strength satisfies this condition, the determination unit 206
Instructs the demodulator 208 for high-speed data reception and the high-frequency unit 207 to be turned on in order to receive in the spot wireless zone 1042. Demodulator 208 and high frequency section 20
7 is configured to turn on the power supply in response to this command and enter the operating state.

When the portable terminal ready for high-speed data reception enters the spot wireless zone 1042, the high-speed data receiver receives a signal from the spot wireless area 1042 and recognizes that the mobile terminal has entered the spot wireless area.

Then, the portable terminal passes a message indicating that the mobile terminal has entered spot radio zone 1042 from control section 205 to modulation / demodulation section 204, modulates the message in modulation / demodulation section 204, and modulates the data in high-frequency section 202. After the conversion, amplification, and band limitation processing, the signal is transmitted from the antenna 201 to the base station 1101 using the uplink wireless channel of the wide area wireless zone 1041.

As a result, the base station 1101 can identify the spot wireless zone 1042 to which information is to be transmitted, and transmits information. As the mobile terminal leaves the wide area wireless zone, the value measured by the received electric field strength measurement unit 203 becomes smaller. When the determination unit 206 to which the measured value is input determines that the value satisfies the condition for turning off the power of the high-speed data receiver, the determination unit 206 switches the high-speed data high-frequency unit 207 to the demodulator 208. A control output for turning off the power is output, and the demodulator 208 receives the high-frequency data for the high-frequency unit 207 and turns off its own power.

(Sixteenth Embodiment) Next, in the wide area wireless zone, information on whether a spot wireless zone exists or not in the zone is broadcast in a sixteenth embodiment. It will be described as.

The portable terminal 1105 is connected to the wide area wireless zone 10
In step 41, the broadcasted information is received, and it is determined whether or not the spot wireless zone 1042 is present in the wide area wireless zone 1041 in which the information is currently entered.

The configuration of terminal 1105 for that purpose is shown in FIG.
Shown in In FIG. 27, when a broadcast signal of the wide area wireless zone 1041 is received, the received signal is down-converted by the harmonic unit 301 and demodulated by the modulation unit 302. If the demodulated signal is a control message,
The message is analyzed by the control unit 302. The control unit 302 has a message analysis function. As a result of the message analysis, if there is a message indicating that the spot wireless zone is included, the control unit 302 turns on the power of the harmonic unit 304 and the demodulation unit 305. Works like that. Subsequent operations are performed in the same manner as in the method described in the fifteenth embodiment.

(Seventeenth Embodiment) Next, a seventeenth embodiment will be described. Here, as in the system described in the sixteenth embodiment, in a case where a system in which a spot wireless zone exists in a wide area wireless zone and a system in which a spot wireless zone does not exist coexist, furthermore than the sixteenth embodiment, Describe an efficient battery saving method.

The portable terminal 1105 is connected to the wide area wireless zone 10
Upon entering 41, the broadcasted message is first received. At this time, as a first case, the wide area wireless zone 10
The operation of the portable terminal 1105 when the spot wireless zone 1042 exists at 41 will be described.

When there is desired information, the portable terminal 1105 makes a request by random access on the upstream channel of the wide area wireless zone 1041. Then, the power of the receiver for the small wireless zone (spot wireless zone 1042) is turned on.

If there is no message to request, the address of the portable terminal is transmitted, and the location is registered. In that case,
Leave the receiver in the small radio zone off.

As a second case, the wide area wireless zone 104
The operation of the mobile terminal when the spot wireless zone 1042 does not exist in No. 1 will be described.

When there is desired information, the portable terminal 1105 requests the base station 1101 by random access on the upstream channel of the wide area wireless zone 1041. After that, leave the receiver for the small radio zone off,
No location registration is performed. The portable terminal 1105 that has transmitted the information request in the wide area wireless zone 1041 where the spot wireless zone 1042 does not exist, enters the wide area wireless zone 1041 where the spot wireless zone 1042 exists and reduces the previously requested information in the spot wireless zone 1042. Receive using the receiver for the wireless zone.

The method will be described as a third case.

The portable terminal 1105 is in the wide area wireless zone 10
At step 41, it is known from the broadcast message that the spot wireless zone 1042 exists. However, since the information request has already been issued, only the location registration is performed here. The base station 1101 determines whether or not there is any information to be transmitted to the mobile terminal 1105 whose location has been registered.
In step 1, the mobile terminal 1105 is notified. Portable terminal 1105
Turns on the power of the receiver in the spot wireless zone (receiver for the small wireless zone) when receiving the information.

As described above, according to these embodiments,
The high-speed data receiver, which consumes a large amount of power, is turned on only when entering the large wireless zone including the small wireless zone, so that very efficient battery saving can be realized. Therefore, the standby time of the mobile terminal can be extended.

Therefore, there is one or more small radio zones for providing a communication service to a mobile terminal, there is a large radio zone for providing a communication service to a mobile terminal, and the transmission rate of data transmitted by the small radio zone. However, in a zone configuration in which the transmission rate of data transmitted by the large wireless zone is larger than that of the large wireless zone and the large wireless zone covers the small wireless zone, when the mobile terminal receives a signal from the large wireless zone, it receives a message in the large wireless zone. By turning on the power of the receiver to perform battery saving, the high-speed data receiver that consumes a lot of power can turn on only when entering the large wireless zone including the small wireless zone,
This allows for very efficient battery savings. Therefore, the standby time of the mobile terminal can be extended.

[0275]

As described in detail above, according to the present invention, it is possible to provide a wireless communication system capable of saving power and achieving a reduction in size and weight.

[Brief description of the drawings]

FIG. 1 is a conceptual diagram of a system to which the present invention is applied.

FIG. 2 is a conceptual diagram of a system for explaining a first embodiment of the present invention.

FIG. 3 is a flowchart illustrating a procedure according to the first embodiment of the present invention.

FIG. 4 is a procedure diagram for explaining a procedure according to a fourth embodiment of the present invention.

FIG. 5 is a system conceptual diagram for explaining a fifth embodiment of the present invention.

FIG. 6 is a procedure diagram for explaining a procedure according to a fifth embodiment of the present invention.

FIG. 7 is a conceptual diagram showing one embodiment of the present invention.

FIG. 8 is a conceptual diagram showing one embodiment of the present invention.

FIG. 9 is a conceptual diagram for explaining an embodiment of the present invention.

FIG. 10 is a diagram illustrating an embodiment of the present invention.

FIG. 11 is a diagram illustrating an example of the present invention.

FIG. 12 is a configuration diagram of a first embodiment of a battery saving method of the wireless terminal device of the present invention.

FIG. 13 is an explanatory diagram of a first embodiment of the battery saving method of the wireless terminal device of the present invention.

FIG. 14 is a configuration diagram of a second embodiment of the battery saving method of the wireless terminal device of the present invention.

FIG. 15 is an explanatory diagram of a second embodiment of the battery saving method of the wireless terminal device of the present invention.

FIG. 16 is a configuration diagram of a third embodiment of the battery saving method of the wireless terminal device of the present invention.

FIG. 17 is an explanatory diagram of a third embodiment of the battery saving method of the wireless terminal device of the present invention.

FIG. 18 is a configuration diagram of a fourth embodiment of the battery saving method of the wireless terminal device according to the present invention.

FIG. 19 is an explanatory diagram of a fourth embodiment of the battery saving method of the wireless terminal device of the present invention.

FIG. 20 is a configuration diagram of a fifth embodiment and a sixth embodiment of the battery saving method of the wireless terminal device according to the present invention.

FIG. 21 is an explanatory diagram of a fifth embodiment of the battery saving method of the wireless terminal device of the present invention.

FIG. 22 is an explanatory diagram of a sixth embodiment of the battery saving method of the wireless terminal device of the present invention.

FIG. 23 is an explanatory diagram of a seventh embodiment of the battery saving method of the wireless terminal device of the present invention.

FIG. 24 is an explanatory diagram of a seventh embodiment of the battery saving method of the wireless terminal device of the present invention.

FIG. 25 is a system configuration diagram according to the present invention.

FIG. 26 is a terminal configuration diagram according to the present invention.

FIG. 27 is a configuration diagram of a terminal according to the present invention.

FIG. 28 is a conceptual diagram of a system for explaining a conventional wireless communication system.

FIG. 29 is a conceptual diagram of a system for explaining a conventional wireless communication system.

[Explanation of symbols]

 Reference numerals 1, 11: communication network 3, 16: information providing station 4: portable terminal, 12: low-speed wireless line base station 13: high-speed wireless line base station 14: low-speed line communicable area 15: high-speed line communicable area 17 ... low-speed wireless line 18 ... high-speed wireless downlink line 31 ... wireless terminal device 32 ... power control unit 33 ... wide-band wave receiving circuit 34 ... medium-band wave receiving circuit 35,51 ... narrow-band wave receiving circuit 36 ... ... Wireless antenna 31 ... Infrared receiver 32 ... Infrared signal 71 ... Inductive coupling coil 72 ... Power amplifier 81 ... Electromagnetic induction device 91 ... Middle band base station 92 ... Band base station 101,101A, 101B ... Reception start identification code 102 , 122A, 122B ... reception end identification code 103, 103A, 103B ... reception start timing 104, 104A, 104B ... reception Ryo timing 111A, 111B, 121A, 121B ... receiving data

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor, Mutsumi Serizawa, 1 Toshiba, Komukai Toshiba-cho, Saisaki-ku, Kawasaki City, Kanagawa Prefecture (72) Inventor Tsutomu Sugawara, Toshiba Komukai, Kochi-ku, Kawasaki-shi, Kanagawa Prefecture No. 1 town Toshiba R & D Center (72) Inventor Katsuya Farmer No. 1 Komukai Toshiba-cho, Saiwai-ku, Kawasaki-shi, Kanagawa F-term (reference) 5K027 AA11 BB17 CC01 CC08 EE04 FF02 FF22 GG04 KK03 MM04 MM17 5K067 AA43 BB04 DD27 DD44 EE02 EE04 EE10 EE54 GG01 GG11 HH05 HH22 KK05

Claims (5)

[Claims] 1. A receiving circuit for receiving a radio transmission wave at a first transmission speed, a transmission / reception circuit for transmitting and receiving a radio transmission wave at a second transmission speed lower than the first transmission speed. A receiving circuit for receiving a radio transmission wave at a third transmission rate lower than the second transmission rate, and information on a signal received by the reception circuit for the radio transmission wave at the third transmission rate. A wireless terminal device having a function of turning on and off a power supply of a circuit for receiving and transmitting a wireless transmission wave at a first transmission rate and a circuit for transmitting and receiving a wireless transmission wave at a second transmission rate; When the reception at the transmission speed is in a standby state, only the receiving circuit for the wireless transmission wave at the third transmission speed is activated, and the transmission and reception circuit for the wireless transmission wave at the first and second transmission speeds is turned off. And keep it inactive. A wireless terminal device. 2. A receiving circuit for receiving a radio transmission wave at a first transmission speed, a transmission / reception circuit for transmitting and receiving a radio transmission wave at a second transmission speed lower than the first transmission speed. Detecting means for identifying that the wireless terminal device can receive the wireless transmission wave at the first transmission rate, and a power supply for a receiving circuit for at least the wireless transmission wave at the first transmission rate by the detecting means. And a power control unit having a function of turning on and off the wireless terminal. In a region where the communication service at the first transmission rate is not provided, the power supply of the receiving circuit for the wireless transmission wave at the first transmission rate is turned off. In the area where the communication service at the first transmission rate is provided, when the detection unit detects that the communication service is within the service area, the power is turned on and the reception at the first transmission rate is performed. Do And a wireless terminal device. 3. A receiving circuit for receiving a radio transmission wave at a first transmission speed, a transmission / reception circuit for transmitting and receiving a radio transmission wave at a second transmission speed lower than the first transmission speed. A power supply control unit having a function of turning on and off a power supply of a receiving circuit for the wireless transmission wave at the first transmission rate in accordance with reception information at the second transmission rate. The unit activates a receiving circuit for receiving a wireless transmission wave at the first transmission rate according to the identification signal transmitted to the wireless terminal device at the second transmission rate immediately before the reception service at the first transmission rate is provided. A wireless terminal device configured to stop a receiving circuit of the wireless transmission wave at the first transmission rate immediately after the reception service at the first transmission rate ends. 4. There is one or a plurality of small radio zones for providing a communication service to a mobile terminal and a large radio zone for providing a communication service in a wide area, and the transmission rate of data transmitted by the small radio zone is: In a wireless communication system having a zone configuration in which the transmission rate of data transmitted by the large wireless zone is larger than the large wireless zone and the large wireless zone covers the small wireless zone, the mobile terminal has a receiver for the large wireless zone and a receiver for the small wireless zone. Together with a measuring and discriminating means for measuring and discriminating the electric field strength. Usually, the receiver for the small radio zone is turned off, and the measuring and discriminating means reaches a level at which a signal from the large radio zone can be received. The wireless communication system is characterized in that when it is determined from the electric field strength, the power of the receiver for receiving the message in the large wireless zone is turned on. Tem. 5. When a message indicating the presence or absence of a small zone is broadcast in the large wireless zone, the mobile terminal is a radio of the large wireless zone and the small wireless zone exists. 5. The wireless communication system according to claim 4, wherein a power supply of a receiver for receiving a message in the large wireless zone is turned on when a message indicating the message is received.