JPH08331153A - Radio communication system - Google Patents

Abstract

PURPOSE: To transmit information via a down link line to a terminal at high speed by relatively increasing the transmission speed of the down link line as compared with an up link line and to improve frequency use efficiency. CONSTITUTION: A low speed transmission means 2 is provided on a terminal 1 and transmits a radio signal to a base station 5 at a relatively low transmission speed via an up link line 4. A low speed reception means 6 is provided on the base station 5 and receives the radio signal transmitted at the relatively low transmission speed from the terminal via the up link line 4. A high speed transmission means 7 is provided on the base station 5 and transmits the radio signal to the terminal 1 via a down link line 8, at a relatively high transmission speed. A high speed reception means 3 is provided on the terminal 1 and receives the radio signal transmitted from the base station 5 via the down link line 8 at a relatively high transmission speed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wireless communication system, and more particularly, to a down line which is a wireless transmission line from a base station to a terminal as compared with an uplink transmission speed which is a wireless transmission line from a terminal to a base station. The present invention relates to a wireless communication system for performing super high speed downlink (hereinafter referred to as SDL) transmission in which the transmission speed of a link is relatively high.

[0002]

2. Description of the Related Art In recent years, with advances in communication and information processing technology, personal handyphone systems (Personal Handyphones)
Various schemes have been proposed for wireless communication systems such as System-hereinafter referred to as PHS-) and the SDL system.

Demands for wireless communication systems such as PHS and wireless local area networks (Local Area Networks-LAN-) are increasing due to the development of various information media, and accordingly, through various networks. The need for wireless communication is also increasing. In view of such a need, in the field of wireless communication systems as well, there has been a demand for widening the transmission wave frequency band as in wire communication systems. Further, in the conventional wireless communication system, an uplink that is a line that transmits a radio signal from a terminal to a base station, and a downlink line that is a line that transmits a radio signal from a base station to a terminal,
The two transmission speeds are matched to perform bidirectional wireless communication. However, the transmission amount of the downlink for transmitting the user information requested by the user to the terminal is considerably larger than the transmission amount of the uplink for transmitting only the control information and the like at present.

This is a common problem not only in mobile communication but also in wireless LAN and various other wireless services. However, since the frequency resources are limited in wireless, it is difficult to broaden the frequency band that is currently being serviced, and higher unused frequencies (quasi-millimeter wave / millimeter wave band)
The development of

FIG. 67 shows an example of conventional frequency allocation. Japanese digital car telephone system RCR STD-
27B (Research Center of Radio System STanDard 2
Take 7B-Radio System Research Center Standard 27B-) as an example. In this system, the downlink and uplink have the same transmission rate, and the radio frequency band is 800
There are systems in the MHz band and the 1.5 GHz band. In both frequency bands, the uplink and downlink are configured in the same frequency band. 810M in the 800MHz band
Downlink from Hz to 826 MHz, from 940 MHz to
The uplink is located at 956 MHz. Since the conventional system assumes downlink and uplink with the same transmission speed, transmission and reception are performed in the same frequency band, but a problem occurs when considering application to the SDL system.

Since a wideband downlink is assumed in the SDL system, it is difficult to realize a wide bandwidth in a low frequency band such as the 800 MHz band and effective use of the frequency. For example, if an attempt is made to transmit at about 100 MHz, one user can use 1 at 800 MHz band.
It may be said that it is impossible to secure the band of 00 MHz. Therefore, from the quasi-millimeter wave band of several GHz to several tens of GH
Transmission in the millimeter wave band of about z is required.

On the other hand, as a conventional example of a wireless communication system having different transmission systems, there is a car telephone in the United States. This is a handset for car phones, analog machine (analog car phone) and digital machine (digital car phone) during the transition period from analog to digital.
It is possible to transmit and receive in both areas by coexisting. In this system, completely different communication systems, analog and digital, are used, and the transceiver has a small number of common circuit parts and is configured to have one analog mobile phone and one digital mobile phone. Therefore, there is a problem that the circuit scale becomes large.

Next, a conventional example of a method of synchronizing with a reference signal source will be described with reference to FIG. Fig. 68
Is a phase-locked loop (Phase Locked L) for obtaining a frequency n / m times the oscillation frequency x of the reference oscillator.
oop-PLL-) 680 is shown. The frequency of the signal of the oscillation frequency x is 1 / m by the frequency divider 681,
Input to the phase comparator. Further, the signal of the voltage controlled variable frequency oscillator (oscillation frequency y) is input to the phase comparator 683 after the frequency is divided by the frequency divider 682 to 1 / n. The phase comparator 683 outputs a voltage value corresponding to the phase difference between the two. The output of the phase comparator is input to the loop filter 684 that determines the frequency tracking characteristic of the PLL 680. The output of the loop filter 684 is input to the voltage controlled variable frequency oscillator (VCO) 685. The PLL 680 is controlled so that the phase difference between the two signals at the input of the phase comparator 683 becomes zero. Therefore, the following expression (1) is established.

X / m = y / n (1) Therefore, the output y of the voltage controlled variable frequency oscillator is y = xn / m (2). From the above, the frequency divider 681 and the frequency divider 682 synchronize with the output of the reference oscillator and the oscillation frequency becomes n / m times. Thus, by using the PLL 680, it is possible to obtain a signal having a frequency n / m times in synchronization with the reference signal source. However, in the method using the PLL, the VCO
Since the (voltage control variable frequency oscillator) 685 is required, it is necessary to provide the oscillator as a separate configuration. The above-mentioned conventional wireless communication system transmits control data and user data at the same radio frequency. However, the amounts of both data are not the same and the amount of data is much larger than the amount of control data. Data and control data are transmitted and received by separate transmission means. Also, large-capacity data can be sent only through a thick transmission line, but sending small-capacity data through a thick transmission line is inefficient and uneconomical. A thick transmission line cannot be formed without using a high frequency, but if a thin transmission line is formed at a high frequency, it is difficult to form a transmission line due to the influence of jitter or the like caused by a high frequency.

[0010]

As described above, in order to support the transmission of wide and large-capacity information such as PHS and wireless LAN, the transmission speed of the uplink from the terminal to the base station and the If the transmission speed of the downlink to the terminal is equivalent, the wireless line could not be used effectively.

Further, in the millimeter wave such as 60 GHz band,
The radio wave propagation loss becomes very large due to the high frequency.
Therefore, the transmission power must be increased when communicating over a certain distance. Although the mobile terminal used in the SDL system is used in the vicinity of the human body, it is not preferable from the viewpoint of safety and hygiene that the terminal transmits with high power. In addition, mobile terminals are generally driven by batteries, but transmitting with high power has the problem of shortening the time that the battery can be used continuously, and the frequency of charging and replacing the batteries increases. There is also the problem that it is complicated.

Further, the millimeter-wave band device is extremely expensive, and the need for a millimeter-wave band transmission device at the terminal makes it difficult to meet the demand for cost reduction. In terms of volume, it was difficult to reduce the size because the millimeter-wave band transmission device was provided.

The modulation method of the signal used for transmission depends on which of the bandwidth (transmission speed) for transmission, the frequency band, the scale of the transmission / reception circuit, the device selection, and the frequency utilization efficiency is important. The optimum will change. For example, when frequency utilization efficiency is important in narrow band communication such as car telephone, π / 4DQPSK method or QA
Linear modulation such as M method is adopted. However, when performing wireless communication in a wide band, such linear modulation requires a wireless component that operates linearly over a very wide band,
It was difficult to reduce the size and power consumption.

In the SDL system in which the transmission speed is obviously different between the downlink and the uplink, when the same modulation method or the modulation method having similar characteristics is adopted as in the conventional case, a method which matches one of them is selected. Or, even if the performance deteriorates, there was no choice but to select a reasonable method for both downlink and uplink.

Further, in the conventional wireless communication system, information transmission of various qualities is realized by having different wireless communication systems. That is, the transmission quality is diversified by accommodating two transceivers of different transmission methods in one housing. For this reason, there is a drawback that the structure of the transceiver becomes large.

The present invention makes it possible to transmit information transmitted via the downlink to the terminal at high speed by making the transmission speed of the downlink relatively faster than that of the uplink, and frequency utilization. It is an object to provide a highly efficient wireless communication system.

Another object of the present invention is to provide a wireless communication system capable of widening the frequency band of transmission waves used in the wireless communication system to the same level as a wired communication system.

Another object of the present invention is to provide a wireless communication system capable of simplifying the configuration of a reference oscillator having a required signal transmission rate and simplifying the configuration of a portable electronic device in a multimedia service.

[0019]

A wireless communication system according to the present invention wirelessly transmits predetermined information from a terminal to a base station provided between a base station, a terminal and the base station. An uplink for, and a downlink for wirelessly transmitting predetermined information from the base station to the terminal provided between the terminal and the base station, in a wireless communication system, the terminal provided in the Low-speed transmitting means for transmitting a radio signal at a relatively low transmission rate to the base station via an uplink, and a relatively low transmission rate from the terminal via the uplink provided in the base station Low-speed receiving means for receiving the radio signal sent by the high-speed transmitting device for transmitting the radio signal at a relatively high transmission rate to the terminal via the downlink line provided in the base station. When, and a, a high-speed receiving means for receiving a radio signal transmitted at a relatively high transmission rate from the base station through the down-link line is provided to the terminal.

The radio communication system according to the present invention also comprises
At least one each of the uplink and the downlink is provided, two or more kinds of transmission rates of radio signals are provided in each line, and one transmission rate and the other transmission rate of the corresponding pair of lines are provided. There is provided at least one set of lines whose ratio is an integer ratio.

The radio communication system according to the present invention is
A base station, a terminal, an uplink for wirelessly transmitting predetermined information from the terminal to the base station, which is set between the base station and the terminal, and a base set between the terminal and the base station. In a wireless communication system including a downlink for wirelessly transmitting predetermined information from a station to a terminal,
A low-speed transmission means provided in the terminal for transmitting a radio signal having a radio frequency in a relatively low frequency band at a relatively low transmission rate to the base station via the uplink; A low-speed receiving means provided in the station for receiving a radio signal transmitted from the terminal at a relatively low frequency and a low transmission rate via the uplink, and via the downlink provided in the base station. Means for transmitting a radio signal having a radio frequency in a relatively high frequency band at a relatively high transmission rate to the terminal, and the base provided via the downlink provided in the terminal. High-speed receiving means for receiving a radio signal sent from the station at a relatively high frequency and a high transmission rate.

Further, in the radio communication system according to the present invention, the high speed transmission means transmits a large amount of user information transmitted from the base station to the terminal via the downlink by a radio signal in a high frequency band. At the same time, the low-speed transmission means transmits small-capacity control information sent from the terminal to the base station via a radio signal in a low frequency band via the uplink.

The wireless communication system according to the present invention is
There may be provided two types of downlinks for transmitting information from the base station to the terminal, a high speed downlink and a low speed downlink. That is, a first low-speed transmitting means that is provided in the terminal and that transmits a radio signal at a relatively low transmission rate to the base station via the uplink; A first low-speed receiving means for receiving a radio signal sent from the terminal at a relatively low transmission rate; and a first low-speed receiving means provided in the terminal base station, and relatively to the terminal via a first downlink. A second low-speed transmitting means for transmitting a radio signal for information having a small amount of information at a low transmission rate;
Second low-speed receiving means for receiving a radio signal of information having a small amount of information transmitted from the base station at a relatively low transmission rate via the downlink, and a second low-speed receiving means provided in the base station. High-speed transmission means for transmitting a radio signal at a relatively high transmission rate to the terminal via two downlinks, and a relatively high-speed transmission means provided in the terminal from the base station via the second downlink. High-speed transmission means for receiving a radio signal transmitted at a high transmission speed.

Further, in the above wireless communication system,
The first low speed transmission means transmits a small amount of control information to the base station via the uplink from the terminal by a radio signal belonging to a relatively low frequency band, and transmits the second low speed transmission. The means transmits a control signal and a voice signal having a small amount of information to the terminal via the first downlink from the base station by a radio signal belonging to a relatively low frequency band, and the high-speed transmitting means is A large amount of user information is transmitted from the base station to the terminal via the second downlink by a radio signal belonging to a relatively high frequency band.

Still further, according to the present invention, the wireless mobile station receives a signal for identifying the wideband wireless base station notified from the wideband wireless base station via a wireless line, and connects from the received signal. Connection optimal station interpreting means for interpreting a wideband wireless base station suitable for, and the wireless mobile station,
Optimum base station notifying means for notifying the server of the specific broadband wireless base station suitable for connection to the server via the narrow band wireless base station, and the server being suitable for connection to the wireless mobile station. Service starting means for starting the predetermined service via the specific broadband wireless base station determined to be present.

Further, when a handover is required, the radio communication system according to the present invention, in addition to the above-mentioned means, the radio mobile station is connected to the specific broadband radio base station. When receiving the predetermined service via, a signal for identifying the broadband wireless base station which is broadcast via a wireless line from the broadband wireless base station different from the specific broadband wireless base station is transmitted. Received,
Means for interpreting a broadband wireless base station suitable as a connection switching destination from the received signal; and the wireless mobile station selecting the specific broadband wireless base station suitable as a connection switching destination for the narrowband wireless base station. Means for communicating to the server via a station and the server switches the connection to the wireless mobile station via the specific broadband wireless base station determined to be suitable for switching the connection. And means for connecting and providing the predetermined service.

[0027]

In the wireless communication system according to the present invention configured as above, it is rational that the transmission capacity of the uplink of the terminal is smaller than the transmission capacity of the downlink of the base station. Have been proposed. That is, since the transmission speed of the information transmitted from the terminal to the user is much higher than the transmission speed of the information transmitted from the terminal to the base station side, in view of this significant difference in transmission capacity, the uplink and downlink are Each transmitting / receiving means is configured so that each transmission capacity can be matched to the required transmission capacity. It is rational that the transmission capacity of the personal portable electronic device is lower than the reception transmission capacity. Further, the user of the personal portable electronic device receives the output and sends a response to the output to the personal portable electronic device. Therefore, the personal portable electronic device only needs to be able to transmit information to the base station at a transmission rate lower than the information transmission rate at the time of transmitting information to the user having the personal portable electronic device.

That is, the personal portable electronic device receives the information from the base station device at a speed higher than the information transmission speed at the time of transmitting the information to the user having the personal portable electronic device, and It is reasonable for electronic devices to transmit information at a speed that is less than or equal to the reception speed.

This is strongly required also because the battery capacity of personal portable electronic devices is limited. That is, the transmission power of the personal portable electronic device is controlled by the storage battery capacity, and the upper limit of the transmission band is strictly controlled by the transmission power. Therefore, the personal portable electronic device is required not to perform wideband transmission due to its limited storage battery capacity.

[0030]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Some preferred embodiments of a wireless communication system according to the present invention will be described in detail with reference to the accompanying drawings.

Prior to describing the embodiments, the basic concept of the present invention will be described with reference to the block diagram of FIG.

The radio communication system according to the present invention comprises a plurality of base stations each sharing a predetermined service area and a plurality of terminals movable in the predetermined service area. Individual terminal 1 as shown
Between the terminal 1 and the base station 5
Is set between the individual terminal 1 and the individual base station 5, and the specific information is wirelessly transmitted from the base station 5 to the terminal 1. And a downlink line 8 for

The terminal 1 transmits the radio signal to the base station 5 via the uplink line 4 at a relatively low transmission rate, and the low-speed transmission means 2 via the downlink line 8. High-speed receiving means 3 for receiving a radio signal transmitted from the base station 5 at a relatively high transmission rate.
And

The base station 5 is connected to the downlink line 4
A low-speed receiving means 6 for receiving a radio signal transmitted from the terminal 1 at a relatively low transmission rate via the terminal 1, and a transmission rate relatively high to the terminal 1 via the downlink line 8. High-speed transmission means 7 for transmitting wireless signals by
And Reference numeral 9 is a terminal side transmitting / receiving unit including the low speed transmitting means 2 and the high speed receiving means 3.

Next, individual embodiments will be sequentially described. First, as shown in FIG. 2, in the first embodiment, in communication with a terminal (personal portable electronic device carried by an individual) 1, a broadband signal is transmitted to a downlink 8 from a (relay) base station 5 to the electronic device 1. And a narrowband signal is transmitted to the uplink 4 from the electronic device 1 to the relay base station 5. Wideband is used for the downlink 8 for communication including images, voice, file editing, information distribution / publicity, broadcasting, etc. In this case, the uplink 4 is used for information and channels for controlling the downlink 8. , A control signal for selecting media, audio, etc. in the case of multimedia.

In FIG. 2, a personal portable electronic device (terminal) 1 transmits / receives data to / from a base station 5 via lines 4 and 8, and its configuration is such that a transmitting / receiving section 9 and A signal processing unit 10 for processing data received with the transmission / reception unit 9 and a control signal to be transmitted, an input unit 13 for inputting a transmission control signal, and an output unit 16 for outputting transmitted data. And are equipped with. The signal processing unit 10 performs A-D conversion and encoding on the data to be transmitted, performs D-A conversion and decoding on the received data, and temporarily stores the data to be processed. It is composed of a memory 12 to be stored. The input unit 13 includes a keyboard 14 such as a 10-key for inputting control information, and a microphone 15 for inputting voice, and the output unit 16 includes a speaker 17 for outputting voice regarding the transmitted data and characters. And a display 18 for displaying information such as

The radio communication system according to the second embodiment, as shown in FIG. 3, is applied to, for example, the field of broadcast communication in which broadcasting and communication are integrated. In that case, the broadcast signal will be able to be received by the electronic device owned by the individual. In such a case, the relay base station 5 responds to the request of the user of the electronic device,
One of the plurality of broadcast signals is selected and transmitted to the electronic device 1. By the way, the electronic device 1 in the future processes and uses the information received by broadcasting as desired. At this time, the information is stored in the relay base station at the request of the electronic device,
It may be processed as described below. FIG. 3 shows an example of the second embodiment.

As shown in FIG. 3, the relay base station 5 in the radio communication system as described above, as shown in FIG. 3, transmits / receives data to / from the electronic device 1 via the lines 4 and 8, and the broadcasting unit 20. A signal processing unit 25 for processing the data received by the data processing device for processing and use, and a wired network terminating device 28 for receiving an information signal transmitted via a wired network such as a CATV or a subscriber optical cable or an ATM network.
And The transceiver unit 20 receives the control signal sent from the electronic device 1 via the uplink 4 and outputs the data to be transmitted to the electronic device 1 side through the antenna, and the duplexer 21 and the received radio frequency. Receiver (Rx) 22 for converting (RF) signal into a predetermined frequency signal
And a transmitter (T that converts data to be transmitted into an RF signal).
x) 23. The signal processing unit 25 selects a channel from the data of the channel according to a request of a user of various electronic devices 1 input via the wired network terminating device 28 and transmits desired data to the electronic device 1. Processor 26 for performing signal processing for the purpose, and memory 27 for storing desired data in response to the user's request.
And

In the second embodiment, the electronic device need not be personal. That is, it may be shared by some people, such as for home use. In particular, as shown in FIG. 4, the relay base station 5 is attached to a utility pole or the like, and information is transmitted there through an optical cable, a coaxial cable, or the like.
The electronic device 1 attached to a home or a car includes a base station of a cordless telephone used for home use, a television set, a VTR,
A home workstation or the like may be connected.
In this case, the electronic device 1 transmits to the relay base station 5 the information requesting the transmission and the information as to whether or not to store the information, in accordance with the requests from these home appliances. The relay base station 5 selects the information accordingly and transmits it to the electronic device 1 while accumulating it in some cases.

The third embodiment is applied to the case where the amount of information generated by a person appears to be large in appearance, the information received is processed and further retransmitted. One of the third embodiments is shown in FIG. The relay base station 5, the information amount increasing server 30, the communication partner server 31, the information source database 32, etc. are interconnected by a network 33 such as a LAN, MAN, or ATM network. The information source database 32 transmits the information A to the electronic device 1 via the downlink 8 by the relay base station 5. At the same time, the information A is also transmitted to the information amount increasing server 30. The electronic device 1 generates a processing operator α (x) for processing the information A and additional information β. Here, the electronic device 1 transmits the processing operator α (x) and the additional information β to the information amount increasing server 30 via the uplink 4 and the relay base station 5. The amount of information that the operator and the additional information have is generated by a person who is a user of the electronic device 1, and this amount is small. The information amount increasing server 30 processes the information A with the processing operator α (x) and the additional information β to create α (A) + β, and transmits it to the server 31. The information amount increasing server 30 may send the processed information α (A) + β to the electronic device 1A via the relay base station 5A and display it on the display 18 (see FIG. 2) of the electronic device 1A. In the electronic device 1, α
(A) + β may be created and displayed on the display 18.

As described in the third embodiment, the amount of information generated by a person may seem large in appearance. This is the case when processing the received information and retransmitting it. That is, this is a case where the portable electronic device receives the original information A, processes it, or adds it to the original information, converts it into a form of α (A) + (B), and retransmits it. In this case, α (A) + β may look like a large amount of information at first glance. In many cases, the original information A has an extremely large capacity. However, the amount of information generated by humans is α
The conversion operation is (X) and the additional information is β.
The amount of information required to represent the conversion operation (X) and the additional information β are information generated by humans,
Since the generation rate does not exceed the amount of information that can be generated by the human brain or body, it does not reach a certain rate and is lower than the amount of information that can be received by humans. In such a case, instead of transmitting α (A) + β, only the conversion operation of α (X) and the information of β are transmitted, and even if α (A) + β is created on the receiving side using that, the result is Is the same.

In this way, the relay base station 5 sends the information A to the electronic device 1, and at the same time, the relay base station 5 stores the information A. Then, in the electronic apparatus 1, the user transmits only the conversion calculation α (X) and the information β to the relay base station while viewing the information A. At the same time, in electronic device 1, α (A) +
β is created and displayed, and the relay base station also creates α (A) + β and transmits it to the communication partner. As described above, it is possible to realize a service that requires transmission of large-capacity data by using a storage battery of small size and small capacity without using frequency resources more than necessary.

Therefore, when the file A is received,
By processing it or adding it, α (A) +
This is the case where the data is converted into a form of β and retransmitted. In this case, α (A) + β may look like a large amount of information at first glance.
However, the amount of information generated by humans is the conversion operation α (X) and the additional information β. The amount of information necessary to represent the conversion operation α (X) and the additional information β are also information generated by humans, and the rate of occurrence exceeds the amount of information that the human brain or body can generate. No, again
As described above, since the speed is not constant, the amount of information that can be received by humans is low. In such a case, α (A) +
Instead of transmitting β, only the conversion operation of α (X) and the information of β are transmitted, and by using this, α (A) +
Make β and transmit to the other party.

All operations such as file editing can be realized by such operations. That is, the original file is transmitted to the mobile terminal by broadband downlink, and the user edits while watching the file. The screen viewed by the user is updated according to the edited contents while being edited by each terminal. At the same time, the edited contents are transmitted to the base station, and the original file is updated in accordance therewith as well. In this way, editing can be performed from the mobile terminal to the base station with extremely small capacity transmission.

By the above operation, the wireless transmission band is reduced, the wireless transmission power is reduced, and moreover, the efficient information transmission by the storage battery becomes possible.

Such processing can be applied to examples other than the file operation described above. That is, A is the data of the face and voice of the user of the personal portable electronic device, and this information is stored in the base station or relay station. Then, the personal portable electronic device transmits to the base station only the parameters that are different from what is spoken or intonation that is normal. Alternatively, only the points of the facial expression of the user that are different from usual and the expression parameters of emotions and emotions are wirelessly transmitted. The base station synthesizes them, re-synthesizes the original voice and original screen transmission, and transmits. Thereby, the wireless transmission band is reduced, the wireless transmission power is reduced, and moreover, efficient information transmission in the storage battery is possible.

Further, the relay base station 5 for performing processing such as α (A) + β may be located at the same position as the wireless transmission / reception device, but in a communication network such as in a computer owned by a user of the electronic device. It may be located at a remote location to which it is connected, or may be built in the device of the communication partner.

A wideband signal is used for the downlink from the relay base station or the base station to the electronic device or the personal portable electronic device, and a narrow band signal is used for the uplink from the electronic device to the relay base station. The communication mode using is performed like the communication system of the fourth embodiment shown in FIG.

In the fourth and fifth embodiments, in communication with an electronic device owned by an individual, a broadband signal is transmitted on a downlink 8 from the relay base station to the electronic device, and an uplink from the electronic device to the relay base station. 4 is applied to two modes, that is, a communication mode for transmitting a narrow band signal and a communication mode for transmitting both narrow band signals. Downlink 8
A wide band is used for communication including images, file editing, information distribution / public information, broadcasting, etc., and in that case, the uplink 4 is used for a control signal, the conversion operator, and the like. In a communication mode in which both of them transmit narrow band signals, they are used for voice and low speed data transmission in both directions. For example, in FIG. 7, it is extremely desirable that the uplink 4 is provided with one narrow band link and the downlink is provided with two narrow band and wide band links 8 and 34. This fifth embodiment is shown in FIG. In FIG. 7, reference numeral 34 is a narrow band downlink line using a low frequency. Further, it is desired that which of the two links is used is determined according to the request of the electronic device. That is, when a call is made from the electronic device, the narrowband downlink 34 is requested in the case of a voice call, and the broadband downlink 8 is requested in the case of an image transmission request.

The basic configuration of the radio communication system according to the fifth embodiment is shown in FIG. The configuration shown in FIG. 8 differs from the configuration shown in FIG. 1 in that the low-speed transmitting means 35 provided in the base station 5, the low-speed receiving means 36 provided in the terminal 1, and the low-speed transmitting means 35 and the receiving means 36 And the downlink line 34.

When communication is started from the terminal 1 (electronic device), first, what kind of communication is to be performed using the narrow band uplink 4 is transmitted to the base station 5 or the relay base station,
It is reasonable to select or set either of the two as the downlink based on the transmitted signal and open the bidirectional link. Further, when the communication addressed to the electronic device 1 reaches the relay base station 5, if two downlinks of a narrow band and a wide band are provided, first, the incoming call is made to the electronic device 1 using the narrow band link. Is transmitted to the electronic device 1, and accordingly, the electronic device 1 receives or transmits to the base station using the link with the call, and receives the allocation of the corresponding link.

In this case, the narrowband links 4 and 34 may be narrowband bidirectional transmission means operating independently of each other. For example, TDMA / TDD (Time Division Mult
A transmission method using the ipleAccess / Time Division Duplex method may be used.

The sixth embodiment is applied when a problem in frequency allocation occurs when the uplink and downlink bands are significantly different. That is, this is FDMA / FDD
(Frequency Division Multiple Access / Frequency Di
Vision Duplex), if the specifications of the duplexer of the terminal are the same for all terminals, it is desirable to make the frequency intervals of the uplink frequency and the downlink frequency the same. At that time, in the narrow band uplink, the frequency difference from the adjacent channel becomes much wider than the bandwidth of the uplink, and many frequency bands remain unused, which is extremely inconvenient. Therefore, the uplink is band-spread with a pseudo-random signal sequence, and the same bandwidth as that of the downlink is restored for transmission. If the spreading ratio is large, the frequency for this uplink can be shared with other systems.

The seventh and eighth embodiments are applied to the case where long-distance transmission is impossible because the high speed downlink is easily affected by multipath. Here, there are cases where there is a demand for transmission to a distant place even if the band is narrow. In such a case, the signal that you want to reach far away is transmitted after spreading the signal with a pseudo-random sequence with a long cycle, and for a short-range and large-capacity one, it is transmitted after spreading with a pseudo-random sequence with a short cycle. By doing so, both requirements can be met. Furthermore, since the transmission speed can be freely selected by selecting the series according to the location of the electronic device,
When signals of various bands are mixed, it becomes possible to perform communication with high flexibility. Alternatively, when wireless circuits with originally different data rates coexist, it is flexible by spreading each line with a pseudo-random sequence with a sequence length so that the spread band is about the same, and effective use of the frequency band is possible. It is possible to provide a wireless communication system capable of doing so.

Further, when such a band spreading method is used, since the same frequency band can be used for a plurality of links, the equipment of base stations and relay base stations, personal portable electronic equipment and electronic equipment are used. Can be easily miniaturized.

In the ninth embodiment, if the transmission / reception timing is changed between transmission and reception, and a communication system in which both are not performed at the same time, it is possible to freely select the frequencies of the uplink and the downlink. , It is applied when more effective use of frequency can be achieved.

In the tenth embodiment, if the uplink is randomly accessed so as to be compatible with the wireless LAN, the server and the database connected to the network can be easily accessed, which is a great advantage. It is applied when giving birth.

11th and 12th Embodiments FIG. 9 and FIG.
It will be described based on.

FIG. 9 is a block diagram of the eleventh embodiment showing the configuration of the SDL system to which the present invention is applied. As shown, a memory 42 is provided between the information providing station 41 and the base station 5,
The information obtained through the communication line 43 is stored in this memory. Although the mobile electronic device 1 accesses the base station by wireless communication, the information that many mobile electronic devices desire is stored in a memory, and most of the information exchange is performed only through the connection line 44. It is possible.

Although the wireless communication post and the memory function as a pair, it is possible to connect a plurality of wireless communication posts to one memory as another embodiment of the present invention.

FIG. 10 is a diagram for explaining the state of the memory in the system of the eleventh embodiment of the present invention. Information 47, 48 obtained from the information providing station is stored in the memory. This information is divided into levels according to the access frequency, and when new information is accessed, the stored contents are discarded from the information 23 having a low access frequency, and the new information 46 is written in the memory space 45.

As another embodiment, if the memory space is large enough for the amount of information, it is possible to write all the information in the memory in advance.

As another embodiment, when the information has an expiration date such as a newspaper or a weekly magazine, the information in the memory may be erased or new information may be overwritten when the expiration date comes. It is possible.

FIG. 11 is a diagram showing a state of an information providing service by the SDL system according to the twelfth embodiment. The information providing station 32 provides newspapers, magazines, images, sounds, traffic information or personal information. This information service station has a communication line 49
Is connected to the base station 5. The base station 5 is installed in a station, a building, a road, or the like, and transmits information in response to a request from the portable electronic device 1. Alternatively, some information is always transmitted from the base station.

The radio communication systems according to the first to twelfth embodiments described above relate to the SDL system shown in the conceptual diagram of FIG. The wireless line is composed of a wide band downlink from the base station to the personal mobile terminal slave unit and a narrow band uplink from the terminal to the base station. In these embodiments, only the asymmetry of the transmission rates of the uplink and the downlink is proposed, and the frequency allocation and the modulation method are not mentioned.

An example of conventional frequency arrangement is shown in FIG. Japanese digital car telephone system RCR
Take STD-27B as an example. In this system, the downlink and the uplink have the same transmission rate, and there are 800 MHz band and 1.5 GHz band systems as radio frequency bands. In both frequency bands, the uplink and downlink are configured in the same frequency band. 8
In the 00 MHz band, downlinks are arranged in 810 MHz to 826 MHz and uplinks are arranged in 940 MHz to 956 MHz. Since the conventional system assumes downlink / uplink with the same transmission rate, transmission / reception is performed in the same frequency band, but a problem occurs when application to the SDL system is considered.

Since a wideband downlink is assumed in the SDL system, it is difficult to realize a wide bandwidth in a low frequency band such as 800 MHz band and effective use of frequency. For example, if an attempt is made to transmit at about 100 MHz, one user can use 1 at 800 MHz band.
It may be said that it is impossible to secure the band of 00 MHz. Therefore, from the quasi-millimeter wave band of several GHz to several tens of GH
Transmission in the millimeter wave band of about z is required.

The radio communication system according to the present invention is 60 GH
FIG. 12 shows an example of frequency allocation in the case of being configured by the z-band SDL system.

On the other hand, the capacity of information that can be generated by humans has an upper limit due to human ability. On the other hand, the amount of information that a human can perceive is much larger than the amount of information that a human can generate. There is a limit to the information that can be generated by humans even if all information such as voice, gesture, input with keyboard or mouse, facial expression, etc. is added. The amount of human voice information is far less than 64 kbps. Even if information transmission means between various human machines such as a keyboard and a mouse are used, they do not exceed the amount of information generated by all individual human brains and various organs of the body, the amount of information generated by humans. Even if all of them are combined, it is considered that the average will not exceed 100 kbps.

On the other hand, the amount of information that can be received by humans is extremely large. Human beings receive various information from multiple media such as voices, images, moods, and senses of touch and smell by means of perceptual organs that can move independently. Furthermore, the human brain and various organs of the human body receive only the information of the capacity that can be processed by the various organs of the brain and body from the information obtained from various sensory organs according to the history of each human and the priority of processing. , Extracted from the obtained information,
To process. In addition, they receive much larger information than the information generated by individual humans through their daily lives. Then, information is returned to the information receiving means such as which information is received according to the received information. The method of this return varies depending on each individual, and therefore, even if many people receive the same information, the processing method is greatly different. That is, humans can receive much larger information than the amount of information that each human brain or body organ can process.

This can also be seen from the difference in size between the part of the human brain that controls information reception and the part that controls information transmission.
The visual and auditory cortex of the brain is extremely large. On the other hand, the part of language development is not so big. Nerves stretch around every corner of the body, and various information is collected in the brain and spinal cord. While this amount of information is extremely large, the information generated by the brain is limited to voice and slight gestures.
The thickest nerve, which is an information transmission path in the body, is the optic nerve, which controls the reception of visual information.

This can be understood from engineering applications. That is, in the case of producing image information that a human receives, generally, several megabits or more of information is required per second in order to produce image information that a human feels natural. Animations made with less than that information allow humans to easily detect movements and unnatural shapes. And human beings cannot generate a corresponding amount of image information. The information contained in human facial expressions is much smaller than the image information generally perceived by human eyes. This is also inferred from the fact that the compression rate is extremely high when the band compression of the image is performed in consideration of the human expression. The band compression of an image that takes human expressions into account has been studied in detail by Professor Harashima et al. Of the University of Tokyo, and its extremely large compression rate is known. The information held by human facial expressions is extremely small in volume, and is almost the same for voice. With the current band compression technology, the amount of information is small because the voice information can be compressed to about 4 kilobits per second.

The amount of information is also limited when the information is generated by playing a musical instrument rather than by voice. Considering the amount of information generated by the performance of the piano, the piano is provided with 88 keys, and when one of the keys is played, a little less than 7 bits of information is generated. You can press 10 keys with a fast person per second, 10 fingers, and the sound level is 1000.
If it is changed to a stage (10 bits), 7 * 10 *
10 * 10 = 7000, which is at most 7 kilobits per second, which does not change depending on the piano model and tone color. The information speed generally required when recording a piano performance is about 100 kilobits per second, but the amount of information generated by the performer is only 1000 bits per second. It seems that a lot of information is generated by playing the musical instrument, but the information generated by the musical instrument is modulated by the information generated by human beings, which is the information of the timbre and personality of the musical instrument. It just seems to be such a big information.

On the other hand, when receiving information, a person can receive and process an extremely large amount of information.
An orchestra in which 150 performers generate information, even if only one player makes a mistake, it can be easily discerned. In addition, the information peculiar to each musical instrument generated from each musical instrument is recognized by the performer as the information generated by the performer becomes extremely large, and the human being always recognizes and extracts those features. It is that.

Consider a situation where five people are having a serious meeting with each other. Each human being receives information from four other people who are making every effort to transmit their opinion to the other. All of the information from the other four has not been processed by the human brain that received it, but at least it has been received through that human sensory organ. Even after the meeting, participants generally know who said what. This is possible because it receives information from four others and the brain processes the necessary parts of it. On the other hand, as for the transmission of information, it is generally impossible for one person to generate information that exceeds the total sum of information that the other four people generate on average. Therefore, there is a large difference between the amount of information generated by humans and the amount of information that can be received, and the amount of information generated by humans is extremely smaller than the amount of information that can be received by humans.

The amount of information transmitted by a conventional personal portable electronic device is smaller than the amount of information that can be generated by this one person, and is only at most voice transmission. Therefore, the transmission capacity was obviously lower than the amount of information that humans could originally generate. However, if wider-band wireless transmission becomes possible in the future, wireless transmission at a transmission / reception transmission rate that is lower than the information transmission rate that humans can receive and higher than the information generation rate that humans can generate will become possible. Come on. At this time, if the transmission and reception speeds are the same as in the conventional case, the frequency cannot be effectively used.

Conventionally, the same modulation method has been generally used for both downlink and uplink. For example, in a narrow band digital car telephone system using TDMA in Japan and the US, both downlink and uplink are π / 4D.
The QPSK method is adopted. Proposal to adopt different modulation method for downlink and uplink is C
US digital car telephone standard (IS-
95). Upstream is OQPSK (Offset Qua
drature phase shift keying-offset quadrature phase shift keying.
ft Keying-4 Phase shift keying-). However,
The information transmission speed is the same, but the configuration is obviously different from the SDL system. Moreover, since the same PSK is used, the properties are very similar. There is no example in which a downlink / uplink system having completely different transmission rates uses modulation systems having completely different properties.

A thirteenth embodiment of the present invention is shown in FIG.
Communication is performed between the wireless communication terminal 101 and the mobile wireless terminal 102 connected to the wired network. The relationship between the radio frequency band and the transmission rate in this communication is shown in FIG.

In the wireless line (downlink) from the wireless communication terminal 101 to the portable terminal 102, transmission is performed at the transmission rate R1 at the radio frequency f1 in the 60 GHz band. In this embodiment, since BSPK, which is a binary modulation, is used as the modulation method, the transmission rate and the used bandwidth are described as the same. R1 has a transmission rate of 100 Mbps and 60 GH
By performing in the z band, it is possible to secure a band of 100 MHz and realize wide band transmission.

The wireless line (uplink) from the portable terminal 102 to the wireless communication terminal 101 uses the frequency f2 in the 800 MHz band to perform transmission at a transmission rate R1 lower than R1. Since it is considered that the information generated by the mobile terminal 102 is mainly input by keys or input signals by voice,
If the transmission speed is about 0 kbps, information can be transmitted sufficiently. In this embodiment, it is set to 30 kbps. 30 kbps
In the case of transmission of the above, since a sufficient bandwidth can be secured even in the 800 MHz band, transmission in this band is possible.

Since the radio frequency band at the terminal is low,
There is little radio wave propagation loss in space, and it is not necessary to transmit with such strong power. Also, because the bandwidth to transmit is small,
The total power consumption is also small. Therefore, it is possible to reduce the power consumption, and it is possible to extend the time during which continuous calls can be made without recharging or replacing the battery.

Further, 800 MHz band devices are widely used in automobile phones and the like, inexpensive devices are widely used, and device miniaturization is progressing. By setting the uplink to the 800 MHz band, it is possible to reduce the price and size of the terminal.

A fourteenth embodiment of the present invention is shown in FIG.

Communication is performed between the wireless communication terminal 301 and the portable wireless terminal 302 connected to the wired network. FIG. 16 shows the relationship between the radio frequency arrangement and the transmission rate at this time.

The wireless line (downlink) from the wireless communication terminal 301 to the portable terminal 302 is performed at the transmission rate of R1 using the radio frequency f1 in the 60 GHz band. R1 is, for example, a high-speed line of 100 Mbps. With it 80
Another line is downlinked at a transmission rate of R2 (for example, 30 kbps) at f2 'in the 0 MHz band. A wireless link (uplink) from the mobile terminal 302 to the wireless communication terminal 301 is performed at a transmission frequency of R2 at a wireless frequency f2 of 800 MHz band.

The difference from the thirteenth embodiment is that another downlink is set up with f2 · R2. 60 GHz
The downlink of the band is easily affected by the shield due to the characteristics of the frequency band. Disconnection of the communication line occurs due to shadowing by the shield. In this embodiment, it is possible to prevent the downlink from being completely cut off by installing another f2 'link in the downlink. 80
Compared with the radio frequency f1 of the 60 GHz band, the radio frequency f2 ′ of the 0 MHz band has less propagation loss and is less susceptible to the effects of shadowing, and thus the possibility of disconnecting the line is reduced. For example, by allocating a control channel to the downlink of f2 ′ · R2, even if the downlink of f1 · R1 is cut off, complete disconnection is not performed, and the protocol / upper state at the time of termination is maintained. The link between the wireless terminal 301 and the mobile terminal 302 is held by executing the above-mentioned protocol / interruption protocol through the control channel. In this case, the portable wireless terminal 302 has a new receiving device of f2 ′ · R2.
Compared to the 0 GHz band receiver, the additional portion is small and low in terms of current consumption, volume and price. By adopting the radio frequency band / transmission speed system configuration of the present embodiment, a highly functional mobile terminal can be realized with a small size, low power consumption and low cost.

A fifteenth embodiment of the present invention is shown in FIG. Communication is performed between a wireless base station 501 connected to a wired network and a plurality of mobile wireless terminals 502. FIG. 18 shows the relationship between the radio frequency band and the transmission rate in this embodiment. From the radio base station 501 to each mobile terminal 502 (downlink) are transmitted at frequencies of R1, at frequencies of f1, f1 ′, and f1 ″ in the 60 GHz band.
1 to (uplink) f2, f in the 2.4 GHz band
2'and f2 "are transmitted at the transmission rate of R2. R1 is 100 MHz and R2 is 2 MHz. Here, broadband transmission of millimeter waves in downlink between one base station and a plurality of terminals. And 2.4G on the uplink
It carries out relatively narrow band transmission in the Hz band. As shown in FIG. 18, the frequency allocation at each terminal is f1 to f2
1'is configured to correspond to f2 'in order.

In this embodiment, both the uplink and the downlink are multiplexed by using the frequency multiplexing method, but it is also possible to perform the multiplexing by the access method such as the time division multiplexing method, the code division multiplexing method and the Aloha method. . Book 15
In the embodiment, the 2.4 GHz band is used because the uplink transmission speed is relatively high at 2 MHz. 2.4GH
In the z band, the propagation loss is larger than in the 800 MHz band, but the propagation loss is much smaller than in the 60 GHz band, and the transmission power of the terminal is also kept small compared to the case where the uplink and downlink are configured in the same 60 GHz band. It becomes possible. There is little effect on the human body of the terminal,
A low current consumption, small size, and inexpensive terminal can be configured.

A sixteenth embodiment of the present invention is shown in FIG. Communication is performed between the wireless base station 701 connected to the wired network and the plurality of mobile terminals 702. FIG. 20 shows the relationship between the radio frequency arrangement and the transmission rate in the seventeenth embodiment. The downlink has a frequency f1 in the 19 GHz band and a wideband transmission rate R
Done in 1. Here, R1 is 50 Mbps. The other downlink is configured with a frequency f3 of 400 MHz band and a narrow band transmission rate R2 (example: 2 kbps). The uplink is configured with a frequency f2 in the 400 MHz band and a transmission rate R2 in the narrow band. As shown in FIG. 20, the frequencies are arranged such that the frequency used by the terminal 1 is f1, f2, f3, and the frequencies used by the terminal 2 are f1 ', f2', f3 '. With this arrangement, 400MHz
The interval between the radio frequencies of the uplink and the downlink of the narrow band can be made constant, and it becomes easy to synchronize the frequencies at the terminals. By arranging the downlink in the 19 GHz band, the broadband of the downlink can be realized and
By arranging the narrow band uplink and downlink in the 0 MHz band, the probability of complete disconnection is suppressed to a low level, and stable control is possible. Since the downlink receiver for the 400 MHz band can be constructed very simply, it can be realized without affecting the total scale of the terminal. By configuring the uplink at a low transmission rate at a low frequency of 400 MHz band, it becomes possible to provide a simple portable wireless terminal.

FIG. 21 shows a seventeenth embodiment of the present invention. The 17th embodiment relates to a wireless unit (wireless device) of a portable wireless terminal applied to the wireless communication systems of the 13th and 15th embodiments. The wireless device of the seventeenth embodiment is f1, R
Antenna 901 for receiving the radio signal of No. 1, a receiving device, and antenna 9 for transmitting the radio signal of f2 and R2
03, an interface 906 between the transmission device and other parts of the mobile terminal, and a control device 905. Here, f1 is a high frequency band (eg, 60 GHz band), and R
1 is a wide band (example: 100 Mbps), f2 is a low frequency band (example: 800 MHz band), and R2 is a narrow band (example: 30 kbps). Frequency band for reception and transmission
Since it is different from the bandwidth, it has an independent antenna
Receive. The receiving device includes a frequency conversion device and a demodulation device for demodulating a signal of a radio frequency in the RF band into a digital signal. The transmitter includes a digital modulator and a frequency converter that convert a digital signal into a radio frequency RF (Radio Frequency) signal. The control device has a function of timing transmission / reception in synchronization with transmission / reception frequency / transmission speed. By providing the mobile device with the wireless device having such a configuration, the 13th and 1st
It is possible to configure a mobile terminal applicable to the wireless communication system of the fifth embodiment.

The eighteenth embodiment of the present invention is shown in FIG. The eighteenth embodiment relates to a wireless unit (wireless device) of a portable wireless terminal applied to the wireless communication systems of the twelfth and fourteenth embodiments. The part different from the embodiment of FIG. 15 is a receiving device 1004 which receives a narrow band (example: 30 kbps) signal at a frequency f2 (example: 800 MHz band) of a low frequency band.
And a duplexer 1006 for accommodating the transmission signal and the reception signal of f2 in one antenna. The transmission 1005 and the receiving device 1004 in the 800 MHz band are cheaper than the receiving device in the 60 GHz band and can be easily downsized. Moreover, since transmission can be performed at a low frequency and a narrow band, the transmission power can be small. It is possible to configure a mobile wireless terminal that has little effect on the human body. By providing the mobile device with the wireless device having such a configuration, it is possible to configure the mobile terminal applicable to the wireless communication systems of the twelfth and fourteenth embodiments.

FIG. 23 shows a nineteenth embodiment of the present invention. The nineteenth embodiment relates to a wireless device and a wireless base station applied to the wireless communication systems of the thirteenth and fifteenth embodiments. In this embodiment, a wireless base station will be described as an example.
The base station has a millimeter wave band (eg, 60 GH) which is the first frequency band.
Radio frequency f1 of z band) and transmission rate R1 (example: 100M
bps), and a radio frequency f2 in a frequency band lower than f1 (eg, 800 MHz band).
And a receiving device 1102 that receives at a transmission rate R2 (eg, 30 kbps) lower than R1. In addition to this, a signal processing unit and an interface unit for connecting to a control unit and a wired system are provided.

By providing the transmitting device and the receiving device having different frequency bands and different transmission rates, it is possible to configure the wireless device and the wireless base station applicable to the wireless communication systems of the first and third embodiments.

FIG. 24 shows a twentieth embodiment of the present invention. The present embodiment relates to a wireless device and a wireless base station applied to the wireless communication systems of the fourteenth and sixteenth embodiments. The wireless device of this embodiment has a frequency f1 in the first millimeter wave band.
And a receiving device 1203 that performs reception at f2 and R2 and a transmitting device 1201 that performs transmission at a low transmission rate R2 at a radio frequency f2 in a frequency band lower than f1 and a transmitting device 1201 that has a higher transmission rate R1.

By providing the transmitting device and the receiving device having different frequency bands and different transmission rates, it is possible to configure the wireless device and the wireless base station applicable to the wireless communication systems according to the fourteenth and sixteenth embodiments. is there.

The twenty-first embodiment of the present invention is shown in FIG. The 21st embodiment is a wireless communication system including a base station 1301 and a terminal 1302. The base station uses a transmitter 1303 that transmits infrared rays at a transmission rate R1 and a radio frequency f.
2 is composed of a receiver 1304 for receiving the transmission rate R2 at 2 and a signal processing unit for interfacing other control with a wired system. The terminal includes an infrared receiver 1305, a wireless transmitter 1306, and a signal processing unit that controls the interface with other parts. Transmission from the base station to the terminal (downlink) is performed using infrared rays at a transmission rate R1. Transmission (uplink) from the terminal to the base station is performed wirelessly at a transmission rate R2 lower than R1.

When the downlink is a radio line using radio waves, it is necessary to secure a band corresponding to the transmission rate. When performing high-speed transmission, it was necessary to secure a wide band, and it was necessary to develop an unused high frequency band such as a millimeter wave band. However, in the present embodiment, the infrared ray is used as the downlink that requires a wide band, so that the system can be configured without the restriction of securing the radio frequency bandwidth. In addition, a device using a millimeter wave band or the like is expensive and has a large volume, but an infrared device is inexpensive and has a small volume, and it is possible to realize a small and low-priced terminal and base station.

A twenty-second embodiment of the present invention is shown in FIG. The wireless device 1401 of the base station uses the first radio frequency band (for example, 6
High frequency transmission rate R1 (100 GHz at frequency f1 of 0 GHz)
R1 at a frequency f2 in a radio frequency band (eg, 800 MHz) lower than f1 and a transmission device that performs Mbps transmission.
It is composed of a receiving device that receives a signal at a lower transmission speed R2 (eg, 30 kbps). The wireless device unit of the terminal includes a receiving device that receives the signals of f1 and R1 and a transmitting device that transmits the signals of f2 and R2.

Here, the transmission of f1, R1 and the transmission of f2, R2 are performed by different modulation methods. If f1 is in the millimeter wave band and R1 is about 100 Mbps,
It is difficult to obtain a linear device in the millimeter wave band over such a wide band. Therefore, a non-linear modulation scheme is desired in the downlink. In the millimeter wave band, the propagation loss is large due to its radio wave propagation characteristics, and the reach of radio waves is short, so it is effective to improve the frequency utilization efficiency by zone design. Also, because the millimeter wave band has a relatively wide band,
Utilization efficiency on the frequency axis is not as severe as conventional microwaves. Therefore, a modulation method that allows the bandwidth to be large compared to the transmission rate is allowed. For these two reasons, the modulation method is non-linear modulation, and FSK with a modulation index of 0.5 or more, which requires a certain amount of bandwidth, is most suitable for implementation.

On the other hand, since the frequency band of the frequency f2 of the signal used in the uplink is microwave and the transmission speed is about several tens of kbps, it is easy to obtain a linear, low-priced, small-sized component, and there is a problem of linearity. Disappears. But,
Since the bandwidth of the allocated frequency is small in this frequency band, effective use of the frequency must be achieved on the frequency axis. Therefore, a modulation method with excellent frequency utilization efficiency is desired. Although it is linear modulation, π / 4DQPSK and offset QPSK, which have excellent frequency utilization efficiency, and GMSK, which is slightly less efficient, are suitable for implementation.

From another point of view, in the high-speed downlink, QAM, which can send a large amount of information in one symbol, is optimal because of its high transmission speed. Although the transmission speed is slow in the uplink, the important information such as control information is the main information, so QAM (Quadrature Amplitude Modulation)
BPSK or the like, which is more resistant to errors than -4 phase amplification modulation) is most suitable for implementation.

As described above, in the SDL system, the transmission rate and the transmission frequency band of the uplink / downlink are different. Therefore, it is possible to obtain a high-quality line for each by using different modulation methods. Become.

FIG. 27 shows a twenty-third embodiment of the present invention. The base stations and terminals shown in this embodiment are the same as those shown in FIG. The downlink from the base station 1501 to each terminal 1502 has a transmission rate R1 at a frequency f1 of 60 GHz band.
(100 Mbps), modulation method 1 (code multiplex modulation: CD
M), the uplink from each terminal to the base station has a transmission rate R2 (8 kbp) at a frequency f2 of 800 MHz band.
s), and the modulation method 2 (GMSK) is transmitted. By changing the transmission rate, frequency band, and modulation method for the uplink and downlink, it is possible to obtain high-quality lines for each, and to reduce the size and power consumption of the terminal.

A twenty-fourth embodiment of the present invention is shown in FIG. The base station 1601 performs transmission at the radio frequency f1 in the quasi-millimeter wave band (19 GHz) using the transmission device 1603 having the transmission rate R1. The transmission rate R1 is not fixed but 1 Mbps to 1
It is a variable transmission rate of 5 Mbps. Modulation method 1 is 4-level F
SK. The terminal has the same frequency f1 and transmission rate R
1, the reception device 1606 of the modulation method 1 is provided to perform reception.
In this wideband downlink, data transmission that requires a wideband such as images is mainly performed. In addition to this downlink, the base station and the terminal are provided with a transceiver having a frequency f2 (1.9 GHz), a transmission rate R2 (384 kbps), and π / 4DQPSK. The transmission at the frequency of f2 uses the time division multiple access / time division multiplexing (TDMA / TDD) system, and thus the same frequency is used. FIG. 29 is a conceptual diagram showing a system configuration using the base station and terminal of FIG.
The base station 1701 has downlinks of modulation methods 1, f1 and R1 on the downlink to each terminal 1702, and has uplinks and downlinks of modulation methods 1, f2 and R2. By adopting such a configuration, it is possible to obtain a high-quality line for each and configure a system with less instantaneous interruption due to shadowing.

In the twenty-fourth embodiment, the same transmission rate R2 is used for both uplink and downlink for f2. Here, it may be considered that the transmission rate is R2 for the uplink and the transmission rate R2 ′ is for the downlink. f2
Control information is mainly transmitted in the uplink and downlink in the above, but in the uplink, retransmission control and data in the uplink when downlink data in f1 is incorrect in addition to mere control information. Transmission takes place. Since the downlink data transmission is performed by the high speed downlink of f1, only the control data is transmitted in the downlink of f2. Therefore, the asymmetry of the amount of information also occurs in the uplink and downlink in f2. The conventional wireless communication system does not consider the asymmetry of information and allocates the same band in uplink and downlink. By providing different transmission rates for the uplink and the downlink in the f2 line that mainly transmits control information, more efficient frequency use can be achieved.

The twenty-fifth embodiment of the present invention will be described below with reference to the drawings. First, a digital wireless communication system according to the 25th embodiment of the present invention will be described with reference to FIG.

It comprises a base station and a plurality of portable electronic devices, and has a downlink line for transmitting information from the base station to the portable electronic device and an uplink line for transmitting information from the portable electronic device to the base station. As the downlink line and the uplink line, for example, first to first
An example is SDL-Net shown in the second embodiment. SDL-N
In et, the area covered by the high-speed downlink line is narrow, the area covered by the low-speed uplink line is wide, and the signal transmission speed of the uplink line is lower than that of the downlink line. By considering the above, the miniaturization of the portable electronic device is considered.

FIG. 31 shows a configuration example of a portable electronic device used in SDL-Net. The digital signal transmitted from the portable electronic device to the base station is subjected to error correction coding, waveform shaping and modulation in the digital section, and converted into an analog signal by the DA converter (DAC) and the interpolation filter (LPF). And input to the mixer. In the mixer, the signal output from the DAC is multiplied by the signal output from the carrier signal generator (oscillation frequency f1) to perform frequency conversion. The mixer output is a band pass filter (BP).
The image after multiplication is suppressed by F), amplified by the RF amplifier, and output from the antenna. On the other hand, a downlink line signal transmitted from a base station is received by an antenna, band-limited by a bandpass filter (BPF), and then amplified by an LNA (low noise amplifier). The LNA output is input to the mixer and is multiplied by the signal output from the carrier signal generator (oscillation frequency f2),
Frequency converted. The image of the mixer output after the multiplication is suppressed by the LPF, and then converted into a digital signal by an AD converter (ADC). ADC
The output (digital signal) is demodulated by the digital section.

In SDL-Net, the uplink signal transmission speed and the downlink signal transmission speed are different (the downlink signal transmission speed is higher than that of the uplink), that is, the timing clock is different from that of the uplink. Downlink is different. According to the present invention,
The clock supplied to the digital section of the uplink may be obtained by connecting the clock used in the downlink via the 1 / n frequency divider, and the circuit configuration can be simplified.

The frequency divider (1 / n) shown in FIG.
It is composed of an n-ary counter and a phase shifter as shown in FIG. As a result, the signal transmission speed differs between the uplink and the downlink, and in the system where the uplink signal transmission speed is higher than the downlink signal transmission speed, the system clock generator can be shared and the circuit configuration is simplified. Can be converted. Further, by adopting the circuit configuration of FIG. 32, it is possible to generate the clock of the uplink line at an arbitrary phase timing. To explain this operation with reference to FIG. 33, the clock of the downlink line is divided by the n-ary counter and phase-shifted by the phase shifter to an arbitrary phase timing. With the above configuration, the uplink and downlink transmission signals can be synchronized.

Next, a digital radio communication system according to the 26th embodiment of the present invention will be described with reference to FIG. 26th
A wireless communication system according to an embodiment includes a PHS line and a high-speed downlink line, an information service base station connected to a wired network, a PHS base station connected to the information service base station, and a high-speed downlink line base. Composed of stations. The signal transmitted from the information service base station to the portable electronic device is transmitted by the PHS line or the high speed downlink line. The signal transmitted from the portable electronic device to the information service base station is transmitted by the PHS line.

FIG. 35 shows the configuration of the wireless section and the modem section of the portable electronic device used in the wireless communication system of FIG. In order to connect to one type of uplink line and two types of downlink line, each transmitting unit and receiving unit are integrated. The received wireless signal is demodulated by the wireless unit and the modem unit and transferred to the control unit and the memory. Further, the digital signal output from the control unit and the memory is transferred to the wireless unit and the modem unit and sent out as a wireless signal.

When demodulating a radio signal, a carrier and a timing clock must be recovered from the received signal. FIG. 36 shows the configuration of the receiver when performing carrier reproduction and timing reproduction.
The radio signal received by the antenna is amplified by the RF amplifier (hereinafter, the RF amplifier output is referred to as an RF signal). The carrier reproduction circuit reproduces the reference carrier from the RF signal, and the reproduced reference carrier is input to the multiplier. At the same time, an RF signal is input to the mixer and frequency conversion is performed.
The output of the multiplier is input to the LPF in order to remove the image signal due to the frequency conversion (hereinafter, the LPF output is referred to as a baseband signal). The timing reproduction circuit reproduces the timing clock from the baseband signal.
Therefore, the portable electronic device used in the wireless communication system shown in FIG. 34 requires two timing recovery circuits as shown in FIG. 36 in order to receive two kinds of wireless signals having different signal transmission rates (FIG. 37). ). That is, as shown in FIG. 37, the timing reproduction circuit 1 for reproducing the timing clock from the baseband signal 1 and the baseband signal 2
The timing reproduction circuit 2 for reproducing the timing clock is required.

According to the present invention, the slower one of the two timing recovery circuits can be replaced with the frequency divider and phase shifter shown in FIG. 32, and the circuit configuration can be simplified. Furthermore, high-speed downlink line and PH
It is possible to synchronize the transmission timing of the S line.

In the twenty-sixth embodiment, the PHS is mentioned as an example of the radio communication system having the same signal transmission rate, but this may be another radio communication system such as a car telephone.

Next explained is a digital radio communication system according to the 27th embodiment of the invention. The configuration of the portable electronic device shown in FIG. 37 requires two types of carrier recovery circuits and clock recovery circuits. A simple representation of this is shown in Figure 3.
It becomes like 8. Carrier reproduction and timing reproduction are performed using the RF signal 1 and RF signal 2, and the baseband signal 1 and baseband signal 2, respectively. According to the present invention as shown in FIG. 31, it is possible to simplify the circuit configuration by replacing the other clock generation source with a frequency divider and a phase shifter. Furthermore, the present invention can be applied not only to the clock recovery circuit but also to the carrier recovery circuit. FIG. 39 shows an example in which the present invention is applied to a carrier reproducing circuit.

The reference signal generation circuit shown in FIG. 39 generates a carrier and a timing clock from these input signals for the RF signal 1 and the RF signal 2, the baseband signal 1 and the baseband signal 2, and outputs them. In the carrier reproduction circuit or the timing clock reproduction circuit, the carrier reproduction or the timing clock is reproduced by extracting the carrier component or the clock component from the input signal by a filter having high selectivity (high Q) such as PLL. That is, carrier recovery or timing clock recovery is performed by removing the error component of the input signal with a filter.

In the carrier recovery circuit and the clock recovery circuit shown in FIG. 38, the carrier or the timing clock is reproduced from a single input signal, respectively. In the reference signal generation circuit shown in FIG. Since the timing clock is reproduced, a plurality of pieces of error information can be obtained. Therefore, the frequency accuracy of the reproduced carrier or timing clock can be improved.

Next explained is a digital radio communication system according to the 28th embodiment of the invention. In the wireless communication system shown in FIG. 30 or FIG. 34, when transmitting information from the base station to the mobile electronic device or from the mobile electronic device to the base station, a frame is composed of a plurality of consecutive bit signals, Transmit. By handling the transmission signal on a frame-by-frame basis, error correction and ARQ can be easily applied. FIG. 40 shows a block of a frame timing detection circuit that recovers a frame timing clock from a demodulated bit data string. Here, the configuration of the receiver shown in FIG. 2 is assumed. The bid data string demodulated in the digital section is input to the correlator together with the bit timing clock. The correlator is composed of a D-type flip-flop (shift register) connected in cascade and a comparator. To the comparator, the shift register output delayed by the bit timing clock and the known signal preloaded in the transmission signal for frame detection are input, and the comparison result of both is output.
The correlator output is input to the PLL and the frame timing clock is generated. In a wireless communication system including two or more types of communication systems having different signal transmission rates and frame periods, two or more frame timing detection circuits shown in FIG. 40 are required.

As described above, according to the present invention, the oscillation source can be replaced with the frequency divider and the phase shifter.
Therefore, one type of PLL can replace two or more types of frame synchronization circuits, and the circuit configuration can be simplified. It is possible to configure a frame timing detection circuit with a shunt and a phase shifter. FIG. 41 shows an example in which a frame timing detection circuit is composed of a frequency divider and a phase shifter.

In FIG. 41, the demodulated bit string 1 and the bit timing clock 1 are input to the correlator 1 and the frame timing trigger signal is detected. Correlator 1
Is output to a PLL including a phase comparator, a loop filter, a voltage controlled variable frequency oscillator, and an m-ary counter. One of the outputs of the voltage controlled variable frequency oscillator is
It is input to the frequency divider shown in FIG. The amount of phase shift of the phase shifter is controlled by the output of the correlator 2.

Further, since the frame timing can be generated by dividing the bit timing clock, the bat timing clock reproducing circuit and the frame timing reproducing circuit can be shared. FIG. 42 shows
3 illustrates a clock signal generation circuit. An error signal is detected from a plurality of inputs (the number of input signals i) such as an RF signal and a baseband signal to control the voltage controlled variable frequency oscillator, and a desired clock (the number of output signals k ) Get. With the above structure, the circuit structure can be simplified.

Next, a radio communication system according to the 29th embodiment of the present invention will be described with reference to FIG. FIG. 43 shows PH
It is composed of an S base station, a wired network, and an SDL-Net base station. SDL-Net mainly performs data transmission using a downlink line which is faster than PHS, and P
Location registration is performed using the HS line.

As described above, in a system in which two or more different transmission systems are mixed, the circuit configuration can be simplified by replacing one of the clock recovery circuits with the frequency divider and the phase shifter. However, for that purpose, clocks of different transmission methods need to be synchronized with each other. FIG. 43 shows, as an example, via a network,
The method for synchronizing the PHS line and the SDL-Net line is shown. A reference signal transmitter is provided on the network side. In the PHS base station, the synchronizing circuit generates a signal synchronized with the reference signal on the network side. When communicating with the portable electronic device, a signal is transmitted based on this synchronization signal. Similarly, in the SDL-Net base station, a signal synchronized with the reference signal on the network side is generated by the synchronizing circuit,
Information is transmitted to the portable electronic device based on the synchronization signal. The synchronization circuit is composed of a clock recovery circuit such as a PLL, but as described above, it may be composed of a frequency divider and a phase shifter.

Next explained is a radio communication system according to the 30th embodiment of the invention. As shown in Fig. 43, PHS
In a wireless communication system including a base station, a wired network, and an SDL-Net base station, it is assumed that the PHS service area and the SDL-Net service area do not match. That is, as shown in FIG. 44, the SDL-Net service area is included in the PHS service area. It is conceivable that there are a plurality of SDL-Net service areas.

The SDL system described above includes a system having a narrow band uplink radio channel (uplink) and a broadband downlink radio channel (downlink), and narrow band upper and lower radio channels (uplink, downlink).
There is a system having a wideband downlink radio channel (downlink). However, the system targeted by the present invention is the latter system, and henceforth, the latter system will be referred to as an SDL system. In the SDL system, the broadband wireless base station uses a high frequency in order to realize high-speed transmission in the downlink wireless channel, but it is difficult to widen its service area because the high frequency causes severe radio wave attenuation. In addition, the wider the bandwidth, the more the transmission distortion due to intersymbol interference increases and the greater the effect of thermal noise. Therefore, the service area of the broadband wireless base station is larger than that of the narrow band wireless base station. Narrows. Therefore, the service area of the narrowband wireless base station and the service area of the wideband wireless base station have different area configurations.

Therefore, in the SDL system, the narrowband wireless base stations that can be connected remain the same as the wireless mobile stations move, and the wideband wireless base stations that can be connected may change, so that the wireless mobile stations can be connected. Both the narrow band wireless base station and the wide band wireless base station must be recognized as base stations. Regarding the method of recognizing in which narrowband wireless base station the wireless mobile station is located, since the upper and lower wireless channels are prepared between the narrowband wireless base station and the wireless mobile station, A procedure similar to the method used in the mobile phone service can be used. The procedure used in the mobile phone service is that the wireless base station broadcasts an identification signal indicating its own station on the downlink channel, and the wireless mobile station that receives the signal sends it to the wireless base station via the uplink channel. And transmits an identification signal indicating its own station. With this, it is possible to recognize which wireless base station the wireless mobile station is located within.

On the other hand, regarding the method of recognizing which broadband wireless base station the wireless mobile station is located in, the specific method is not described in the above description. Therefore, in a system such as the one to which the present invention is directed, regarding a method of recognizing in which wideband radio base station the radio mobile station is located,
It can be said that it did not exist. As described above, since there is no method for recognizing which wideband wireless base station the wireless mobile station, which is indispensable for starting the provision of communication services, is located in the service area of the wireless mobile station, as a result, there is no way to recognize the SDL system. However, in a system that includes a wireless mobile station that does not have a broadband upstream wireless channel as its component, communication for providing a service cannot be started. Furthermore, under the condition of providing the service, the service cannot be maintained, that is, the handover cannot be performed when the wireless mobile station moves to the service area of another wireless base station.

In the radio communication systems according to the thirty-first to thirty-ninth embodiments, as shown in the conceptual diagram of FIG. 45, the radio mobile station 51 is notified from the broadband radio base station 52 via a radio line. The connection optimum station interpreting means 61 for receiving the signal for identifying the broadband wireless base station 52 and interpreting the broadband wireless base station 52 suitable for connection from the received signal, and the wireless mobile station 51 for connection. Optimum base station notifying means 62 for notifying the server 56 of the suitable specific wide band wireless base station 52 via the narrow band wireless base station 53, and the server 56 connecting to the wireless mobile station. Service starting means 63 for starting the predetermined service via the specific broadband wireless base station 52 which is determined to be suitable.

When a handover is required, the radio communication system according to the thirty-first to thirty-ninth embodiments has the above-mentioned means and the radio mobile station is suitable for connection. The broadband wireless base station which is notified via the wireless line from the broadband wireless base station different from the specific broadband wireless base station when receiving the predetermined service via the broadband wireless base station. Means for interpreting a wideband wireless base station suitable as a connection switching destination from the received signal, and the specific wideband wireless base suitable for the wireless mobile station as a connection switching destination Means for notifying a station to the server via the narrowband wireless base station, and the server is determined to be suitable as a connection switching destination for the wireless mobile station. And a means for providing switched connections such as via the constant wideband radio base station continuously the predetermined service.

According to the above configuration, the wireless mobile station that has received the signal for identifying the broadband wireless base station notified from the broadband wireless base station is suitable for connection by interpreting the received signal. Determine a broadband wireless base station.
The wireless mobile station uses the upstream wireless channel from the wireless mobile station to the narrowband wireless base station to inform the narrowband wireless base station of which wideband wireless base station it is connected to. Since the narrowband wireless base station and the server are connected via the network, the narrowband wireless base station informs the server through the network of which wideband wireless base station the wireless mobile station is suitable to connect to. be able to. In this way, even if there is no uplink radio channel from the wireless mobile station to the wideband wireless base station, the server can recognize to which wideband wireless base station the wireless mobile station is suitable for connection. It becomes possible to start a predetermined service for the wireless mobile station via the broadband wireless base station which is determined to be suitable for connection to the wireless mobile station.

Further, regarding the maintenance of the service when the wireless mobile station moves to the service area of another broadband wireless base station under the condition that the predetermined service is provided through any of the broadband wireless base stations. According to the thirty-first to thirty-ninth embodiments of the present invention, by receiving the signal for identifying the wide band wireless base station notified from the wide band wireless base station via the wireless line, and interpreting the received signal. , Determine a wideband wireless base station suitable as a connection switching destination. Then, the wireless mobile station informs the server via the narrowband wireless base station which broadband wireless base station is suitable as the connection switching destination. By doing so, even if there is no uplink wireless channel from the wireless mobile station to the wideband wireless base station, the server can recognize which wideband wireless base station is suitable as the connection switching destination. The server can switch the connection to the wireless mobile station via the broadband wireless base station determined to be suitable as the connection switching destination and continue to provide the predetermined service.

First, the configuration of the wireless communication system which is the object of the 31st to 39th embodiments of the present invention will be described. FIG. 46 is a conceptual diagram showing the configuration of the system according to the present invention. Figure 46
In the figure, 51 is a wireless mobile station, 52 and 53 are wireless base stations, 56 is a data server, and 57 is a network. The radio base station 52 has a transmitting means for performing broadband information transmission (hereinafter referred to as a broadband radio base station 52). On the other hand, the radio base station 53 has a transmission / reception means for performing narrow band information transmission (hereinafter referred to as a narrow band radio base station 53). The wireless mobile station 51 is a terminal that performs information transmission with the wideband wireless base station 52 or the narrowband wireless base station 53. In addition, the broadband wireless base station 5
The wireless channel between the wireless mobile station 51 and the wireless mobile station 51 is called a wideband wireless channel, and the wireless channel between the narrowband wireless base station 53 and the wireless mobile station 51 is called a narrowband wireless channel.

In FIG. 46, the wide band wireless base station 52 and the narrow band wireless base station 53 are distinguished for convenience.
As shown in FIG. 47, one radio base station 58 may include both a transmitting / receiving means for narrow band information transmission and a transmitting means for wide band information transmission. In this case, although the cost of the wireless base station 58 increases, the total number of wireless base stations in the entire system can be reduced. Further, when it is necessary to control between the transmitting / receiving means for narrow band information transmission and the transmitting means for wide band information transmission, the control becomes easy. Hereinafter, the 31st to 39th embodiments of the present invention will be described with reference to FIG. 46 in which the wideband wireless base station 52 and the narrowband wireless base station 53 are different wireless base stations.

Thirty-First Embodiment: In the thirty-first embodiment, when the wireless mobile station 51 is located in the area shown in FIG. 48 (a), that is, the wireless mobile station 51 is a broadband wireless base station 52.
A procedure for starting wireless communication when it is possible to connect with will be described. FIG. 49 shows the most basic flowchart according to the 31st embodiment. In step ST1, the wireless mobile station 51
Interprets which broadband wireless base station 52 is located within the coverage area. In step ST2, the information interpreted in step ST1 is transmitted to the server 56 via the narrowband wireless base station 53. As a result, the data server 56 can recognize in which broadband wireless base station 52 the wireless mobile station 51 is located. In step ST3, the wireless mobile station 51 is instructed to step ST3.
The provision of the service via the broadband wireless base station 52 interpreted in 1 is started. Further, when actually starting the service, various procedures based on the above-described flowchart can be considered, and an example thereof is shown in FIG. Step ST11
Then, it is interpreted in which broadband wireless base station 52 the wireless mobile station 51 is located. In step ST12, it is determined whether or not there is a service request from the user. If there is a service request from the user, the process proceeds to step ST13, and if there is no request, the process proceeds to step ST
Repeat 11 In step ST13, it is selected whether or not to receive the service by using the wideband downlink radio channel. If the service is to be received using the broadband downlink wireless channel, the process proceeds to step ST14, and if not, the process proceeds to step ST16. In step ST14, the information interpreted in step ST11 is set to the narrowband wireless base station 53.
To the server 56 via. In step ST15, the provision of services to the wireless mobile station 51 via the broadband wireless base station 52 interpreted in step ST11 is started. On the other hand, if it is determined in step ST13 that the service using the wideband downlink radio channel is not received, that is, if the service using the narrowband downlink radio channel is selected, the wireless movement is performed in step ST16. The station 51 informs the server 56 that it uses a narrow band downlink radio channel as a downlink channel. In step ST17, the wireless mobile station 51
Then, the provision of services via the narrowband wireless base station 53 is started.

Further, in the 31st embodiment, step S
Although an example is shown in which step ST14 is performed when a service using a wideband downlink radio channel is received at T13, step ST14 may be performed after step ST11 regardless of whether or not there is a service request. I do not care. In other words, even if there is no service request from the user,
The information interpreted in step ST11 may be transmitted to the server 56 via the narrow band wireless base station 53. In this case, regardless of whether or not there is a service request from the user, the server 56 determines which broadband wireless base station 5
It is possible to recognize whether it is located within the two service areas. In addition, step ST12 to step ST11
There is also a procedure to be performed before the step ST1, that is, to perform step ST11 and subsequent steps only when there is a service request from the user. In this case, if there is no request from the user, the wireless mobile station 51 does not have to interpret which wideband wireless base station 52 the wireless mobile station 51 is located within.
Power consumption is reduced. Further, in order to further reduce the power consumption, it is possible to turn off the power supply of the receiving means for wideband information transmission.

Next, with reference to FIG. 51, a sequence diagram of a communication starting procedure of the radio communication system according to the 31st embodiment will be explained. The wireless mobile station 51 receives the signal 511 for identifying the wireless base station notified from the wideband wireless base station 52, and from the received signal, which wireless base station 5 of the wideband the wireless station 51 is.
It is possible to determine whether or not it is located within the two service areas. When a service request is generated under such a situation, the user dials up a telephone number unique to the server 510 to obtain a communication line from the wireless mobile station 51 to the server 56 via the narrowband wireless base station 53. To do. After the communication line from the wireless mobile station 51 to the server 56 is acquired, the wireless mobile station 51 sends the data transmission request message 20
2 transmits to the server 56 a signal 513 for identifying the broadband wireless base station 52 to which the station 2 can connect. The server 56 sends the data request message 5 transmitted from the user.
12 and the signal 513 and interprets the information 5 requested by the user via the broadband wireless base station 52 designated by the signal 513.
14 is transmitted.

32nd Embodiment: In the 32nd embodiment, wireless communication is performed when the wireless mobile station 51 is located in the area shown in FIG. 48B, that is, when it cannot be connected to the broadband wireless base station 52. The procedure to start is explained. FIG. 52 shows a most basic flowchart according to this embodiment. In step ST21, it is interpreted that the wireless mobile station 51 is not located within the service area of the broadband wireless base station 52, that is, it cannot be connected to the broadband wireless base station 52. In step ST22, the wireless mobile station 51 notifies the server 56 via the narrowband wireless base station 53 that the narrowband downstream wireless channel is used as the downstream channel.
In step ST23, the provision of services to the wireless mobile station 51 via the narrowband wireless base station 53 is started. When starting a service, various procedures based on the above-mentioned flowchart can be considered.

FIG. 53 shows an example. In step ST31, it is interpreted that the wireless mobile station 51 is not located within the service area of the broadband wireless base station 52, that is, it cannot be connected to the broadband wireless base station 52. Step ST
At 32, it is determined whether or not there is a service request using the narrow band downlink wireless channel. If there is a service request from the user, the process proceeds to step ST33, and if there is no service request, step ST31 is repeated. In step ST33, the wireless mobile station 51 notifies the server 56 via the narrowband wireless base station 53 that the narrowband downstream wireless channel will be used as the downstream channel. Step ST
At 34, the service starts to be provided to the wireless mobile station 51 via the narrow band wireless base station 53. Further, in the above embodiment, after interpreting that the wireless mobile station 51 cannot connect to the broadband wireless base station 52 in step ST31, that is, after determining whether or not it can connect to the broadband wireless base station 52, in step ST32. Although an example of determining the presence / absence of a service request from the user has been shown, as shown in the thirty-first embodiment, after determining the presence / absence of a request from the user,
You may implement step ST31.

Next, with reference to FIG. 54, a sequence diagram of the communication starting procedure in the thirty-second embodiment will be described. The wireless mobile station 51 cannot receive the signal 541 for identifying the wireless base station reported from the broadband wireless base station 52. Even if the signal can be received, the signal strength necessary and sufficient for providing the service cannot be obtained. Therefore, the wireless mobile station 51 interprets that itself is located outside the service area of the broadband wireless base station. That is, the wireless mobile station 5
1 recognizes that only the service using the narrow band downlink radio channel can be received. In such a case, the user selects whether or not to receive a service using a narrow band downlink radio channel. When receiving the service using the narrow band downlink wireless channel, the user dials up 540 a telephone number unique to the server and acquires a communication line from the wireless mobile station 51 to the server 56 via the narrow band wireless base station 53. . After the communication line from the wireless mobile station 51 to the server 56 is acquired, the wireless mobile station 51 sends to the server a data transmission request message 542 and a signal 543 for identifying the narrowband wireless base station 53 to which the local mobile station 51 can connect. To transmit. Normally, the narrow band wireless base station 53 used in the downlink wireless channel is the same as the narrow band wireless base station 53 used in the upstream wireless channel, so the signal 543 indicates that the wide band downlink wireless channel cannot be used. Information that is merely transmitted to 56 may be used. The server 56 interprets the data request message 542 and the signal 543 transmitted from the user, and via the narrow band wireless base station 53 designated by the signal 543 or the narrow band wireless base station 53 used in the upstream wireless channel. Then, the information 544 requested by the user is transmitted.

Next, procedures relating to handover will be described in the following 33rd to 36th embodiments.

The handovers dealt with in these embodiments are limited to the handovers that occur when the radio mobile station 51 moves within the service area of the radio base station 53 of a specific narrow band. Because the narrow band wireless base station 5
3 has the upper and lower radio channels, so that the handover between the narrow band radio base stations 53 can be sufficiently handled by the conventional handover procedure. Since the procedure for starting communication is shown in the 31st and 32nd embodiments, the handover procedure after the state where the service is provided will be described in the 33rd to 36th embodiments.

Thirty-third embodiment: In the thirty-third embodiment, when the wireless mobile station 51 moves as shown in FIG. 48 (c), that is, the wireless mobile station 51 moves to the broadband wireless base station 5
The procedure of the handover when the mobile station moves into the service area of another broadband wireless base station 52 while receiving the service in the second service area will be described.

FIG. 55 shows the most basic flowchart relating to this embodiment. In step ST41, it is determined whether or not the wireless mobile station 51 can receive the signal notified from the broadband wireless base station 52 different from the broadband wireless base station 52 providing the service. If the signal is receivable, the received electric field strength of the signal is compared with the received electric field strength of the signal transmitted from the broadband wireless base station 52 currently providing the service, and the comparison result indicates that the wireless mobile station 51 interprets the broadband wireless base station 52 of the handover destination. Therefore, the broadband wireless base station 5 currently providing the service
When the received electric field strength of the signal transmitted from 2 is sufficient,
The service is continued without switching the radio base station. Further, the criterion for selecting whether or not to switch the connection differs depending on the communication quality required by the provided service. For example, in the case of a voice communication service, since the requested communication quality is not so high, the wireless base station is not switched even if the communication quality slightly deteriorates as the wireless mobile station 51 moves. On the other hand, in the case of the data communication service, the required communication quality is higher than that of the voice communication service, and therefore the wireless base station is switched so that the communication quality is improved as much as possible. In step ST42, the information interpreted in step ST41 is transmitted to the server 56 via the narrowband wireless base station 53. This allows the server 56
Can recognize the broadband wireless base station 52 of the handover destination. In step ST43, the service is continuously provided by switching the connection through the broadband wireless base station determined to be the handover destination.

Next, with reference to FIG. 56, a sequence diagram of handover in the 33rd embodiment will be described. When the wireless mobile station 51 moves as shown in FIG. 48 (c), the signal strength at the time of receiving the information data 565 transmitted from the broadband wireless base station 52 deteriorates, so that the information cannot be received correctly. . On the other hand, since the wireless mobile station 51 has moved into the service area of the other wideband wireless base station 52, it can receive the signal 566 for identifying the wireless base station notified from the other wideband wireless base station 52. As a result, it is possible to determine which broadband wireless base station 52 the local station is moving from the received signal. The wireless mobile station 51 determines whether or not a handover should be performed based on the relationship between the signal strengths of the information signal 565 and the signal 566 at the time of reception. If it is not necessary to perform the handover, the information data 565 is continuously received as it is.

When it is necessary to perform a handover, the wireless mobile station 51 transmits to the server 56 a handover request message 567 and a signal 558 for identifying the broadband wireless base station 52 of the handover destination. The server 56 sends a handover request message 56
7 and the signal 568 are interpreted, a line disconnection request message 569 is sent to the broadband wireless base station 52 in communication. After disconnecting the line, the server transmits the information data 570 via the broadband wireless base station 52 designated by the signal 568.
As a result, the user can continue to receive the provided service even when the service area is changed due to the movement.

Thirty-fourth Embodiment: In the thirty-fourth embodiment, when the radio mobile station 51 moves as shown in FIG. 48 (d), that is, the radio mobile station 51 moves to the broadband radio base station 5
The procedure of the handover when the mobile station moves out of the service area of the broadband wireless base station 52 while receiving the service in the second service area will be described with reference to FIG. Since the wireless mobile station 51 has moved out of the service area of the broadband wireless base station 52, the reception electric field strength of the signal transmitted from the broadband wireless base station 52 currently providing the service deteriorates. Further, it is not possible to receive a signal notified from a wide band wireless base station 52 different from the wide band wireless base station 52 that provides the service. Therefore, step ST
In 51, the wireless mobile station 51 is a broadband wireless base station 52.
Interpret that you cannot connect with. In step ST52, the wireless mobile station 51 cannot connect itself to the broadband wireless base station 52, that is, as the downlink channel transmission,
The server 56 is notified via the narrow band wireless base station 53 that the transmission via the narrow band wireless base station 53 will be performed. In step ST53, the server 56 switches the connection via the narrow band wireless base station 53 and continuously provides the service.

Further, in the above embodiment, the wireless mobile station 51 receives the broadband wireless base station 52 while receiving the predetermined service.
When it becomes impossible to connect with the wireless LAN, it is assumed that the connection is switched to the connection via the narrow band wireless base station 53. However, as the next step of step ST51, it is provided using the narrow band downlink wireless channel. A step of selecting whether to continue the service being provided or to stop the provided service may be added. When the service continuation is selected, the process proceeds to step ST52. The case of selecting the stop of the service will be described in detail in the 35th embodiment.

Next, with reference to FIG. 58, a handover sequence diagram in the 34th embodiment will be described. When the wireless mobile station 51 moves as shown in FIG. 48 (d), the signal strength at the time of receiving the information data 585 transmitted from the broadband wireless base station 52 deteriorates, so that information cannot be received correctly. . On the other hand, the wireless mobile station 51
Has moved out of the service area of the broadband wireless base station 52, and therefore cannot receive the signal 586 for identifying the wireless base station reported from another broadband wireless base station 52. Even if the signal can be received, the sufficient signal strength necessary to be provided with the service cannot be obtained. Therefore, the wireless mobile station 51 interprets that itself is located outside the service area of the broadband wireless base station 52. That is, the wireless mobile station 51 recognizes that it can only receive services using the narrow band downlink wireless channel. Therefore, according to the following procedure, the connection is switched to the narrow band downlink radio channel and the provided service is continued.
The wireless mobile station 51 uses the handover request message 587.
And a signal 588 for identifying the narrow band wireless base station 53 of the handover destination are transmitted to the server 56.

Normally, the narrow band radio base station 53 used in the downlink radio channel is the same as the narrow band radio base station 53 used in the uplink radio channel, and therefore the signal 588 cannot use the wide band downlink radio channel. The server 56
It may be information just to tell. When the server 56 interprets the handover request message 587 and the signal 588, it sends a line disconnection request message 589 to the broadband wireless base station 52 with which it is communicating. After disconnecting the line, the server 56 sends the information 590 requested by the user via the narrow band wireless base station 53 designated by the signal 588 or via the narrow band wireless base station 53 used in the uplink wireless channel.
To transmit. As a result, the user can continue to receive the provided service even when the service area is changed due to the movement.

Thirty-fifth Embodiment: In the thirty-fifth embodiment, when the radio mobile station 51 moves as shown in FIG. 48 (d), that is, the radio mobile station 51 moves to the broadband radio base station 5
The procedure for stopping the service when moving out of the service area of the broadband wireless base station 52 while receiving the service in the second service area, that is, the procedure for disconnecting the line will be described with reference to FIG.

Since the wireless mobile station 51 has moved out of the service area of the broadband wireless base station 52, the received electric field strength of the signal transmitted from the broadband wireless base station 52 currently providing the service deteriorates. Further, it is not possible to receive a signal notified from a wide band wireless base station 52 different from the wide band wireless base station 52 that provides the service. Therefore, in step ST61, the wireless mobile station 51 interprets that it cannot connect to the broadband wireless base station 52. Step ST62
Then, the wireless mobile station 51 cannot connect itself to the broadband wireless base station 52, that is, the wireless mobile station 51 stops the provided service.
To the server 56 via. In step ST63,
The server 56 stops the provided service and disconnects the communication line from the broadband wireless base station 52 to the wireless mobile station 51. Also, as described in the thirty-fourth embodiment, a step of selecting whether to continue the service provided using the narrow band downlink radio channel or to stop the provided service. In the case of adding, the step continues after step ST61, and when it is selected in this step to stop the provided service, the process proceeds to step ST62.

Next, with reference to FIG. 60, a handover sequence diagram in the thirty-fifth embodiment will be described. When the wireless mobile station 51 moves as shown in FIG. 48 (d), the signal strength at the time of receiving the information data 605 transmitted from the broadband wireless base station 52 deteriorates, so that information cannot be received correctly. . On the other hand, the wireless mobile station 51
Has moved out of the service area of the broadband wireless base station 52, and therefore cannot receive the signal 606 for identifying the wireless base station broadcast from another broadband wireless base station 52. Even if the signal can be received, the sufficient signal strength necessary to be provided with the service cannot be obtained. Therefore, the wireless mobile station 51 interprets that itself is located outside the service area of the broadband wireless base station 52. That is, the wireless mobile station 51 recognizes that it cannot receive the service using the wideband downlink wireless channel. for that reason,
Take steps to stop the provided services. The wireless mobile station 51 transmits a communication disconnection request message 607 to the server 56. When the server 56 interprets the communication disconnection request message 607, it sends a line disconnection message 608 to the wireless mobile station 51 via the broadband wireless base station 52 in communication. As a result, when the wireless mobile station 51 moves away from the service area, the provided service can be promptly stopped at the user's will.

Thirty-sixth embodiment: In this embodiment, when the radio mobile station 51 moves as shown in FIG. 48 (e),
That is, when the wireless mobile station 51 is outside the service area of the broadband wireless base station 52 and is receiving service using a narrow band downlink wireless channel, the hand when the wireless mobile station 51 moves into the service area of the broadband wireless base station 52. The over procedure will be described with reference to FIG.

As the wireless mobile station 51 moves, it can receive a signal for identifying the wireless base station broadcast from the wideband wireless base station 52. Therefore, step S
At T71, the wireless mobile station 51 interprets into which broadband wireless base station 52 the mobile station is moving. In step ST72, the information interpreted in step ST71 is transmitted to the server 5 via the narrow band wireless base station 53.
Tell 6 As a result, the server 56 becomes the wireless mobile station 5
It is possible to recognize which broadband wireless base station 52 the mobile station 1 is moving into. In step ST73,
The connection is switched through the wideband wireless base station 52 interpreted in step ST71, and the service is continuously provided. By the way, in order to perform such hand-over, the wireless mobile station 51 is always in a standby state for receiving a signal notified by the broadband wireless base station 52, even when using a narrow band wireless channel. There must be. This is because when entering the service area of the broadband wireless base station 52, a handover may be performed even if the signal reception state via the narrowband wireless base station 53 is good.

In the above-mentioned embodiment, when it is possible to interpret that the wireless mobile station 51 has moved into the service area of the broadband wireless base station 52 in step ST71, an example in which the handover is immediately carried out has been described. Before doing so, a step may be added for the user to select whether or not to perform the handover. Because, as described above, the reception state of the signal via the narrow band wireless base station 53 is
This is because it is not necessarily in a bad state, and in the case of a service that does not require high-speed transmission such as a voice communication service, handover is not necessarily required. There are three places to add this step, and each has the following features.
First, when this step is added after step ST72, the server 56 recognizes in which broadband wireless base station 52 the service area of the wireless mobile station 51 is located regardless of whether or not a handover is performed. it can. Next, when the step is added after step ST71,
When no handover is performed, the wireless mobile station 51 does not tell the server which broadband wireless base station 52 is located in the service area, so that the amount of traffic between the wireless mobile station 51 and the server 56 is reduced. . Finally,
When the step is added before step ST71, the wireless mobile station 51 does not have to interpret which wideband wireless base station 52 the wireless mobile station 51 is located within.
Power consumption is reduced. In this case, it is possible to further reduce the power consumption by turning off the power supply of the receiving means for wide band information transmission.

Next, with reference to FIG. 62, a handover sequence diagram in the system of the sixth embodiment will be described.
When the wireless mobile station 51 moves as shown in FIG. 48 (e), the wireless mobile station 51 can receive the signal 625 for identifying the wireless base station notified from the broadband wireless base station 52. From the received signal, it is possible to determine which broadband wireless base station 52 the local station is moving into. At this time, as described above, the signal strength of the information data 624 received by the wireless mobile station 51 is not necessarily bad. Therefore, it is the user's will to select whether or not to perform the handover. Alternatively, it is set in advance whether or not the handover is performed when the service area of the broadband wireless base station 52 is entered. When it is set not to perform the handover, the wireless mobile station 51 may turn off the power supply of the receiver for broadband information transmission. When the wireless mobile station 51 does not perform the handover when it enters the service area of the broadband wireless base station 52, the information data 62 is directly transmitted via the narrowband wireless base station 53.
4 continues to be received.

When performing the handover, the wireless mobile station 51 sends a handover request message 626 to the server 56 and the broadband wireless base station 5 of the handover destination.
A signal 627 for identifying 2 is transmitted. Server 5
6 is a handover request message 626 and a signal 627
Is interpreted, a downlink wireless channel disconnection message 628 is sent to the narrow band wireless base station 53 in communication. After disconnecting the line, the server 56 transmits the information data 629 via the broadband wireless base station 52 designated by the signal 627. As a result, the user can continue to receive the provided service even when the service area is changed due to the movement.

37th Embodiment: The server 56 is assigned a unique logical number. When there are multiple servers on the network, the logical number is one for all servers. When the user wants to receive the service, he or she makes a call to the server 56. The calling method includes a method in which the user directly dials up the logical number (FIG. 63 (a)) and a method in which the user selects the SDL service item displayed on the wireless mobile station 51 (FIG. 63 ( b)). Where SD
The L service refers to a service provided by using the SDL system. In this method, the SDL service item and the logical number are associated with each other, and when the user selects the SDL service item, the dial-up is automatically performed. Either way, the server 56
When a call is made to, first, a communication line from the wireless mobile station 51 to the narrowband wireless base station 53 is acquired.

Next, the narrow band radio base station 53 is operated by the server 5
Connect with 6. When there is only one server 56 on the network 57, a communication line from the narrow band wireless base station 53 to the server 56 is acquired. When a plurality of servers 56 are present on the network 57, the server 56 to which the narrowband wireless base station 53 is connected is selected. There are four selection methods.

First, there is a method in which each narrow band wireless base station 53 recognizes in advance the server 56 to which its own station should connect, and always selects that server 56. Normally, the connected server 56 is adjacent to the narrow band wireless base station 53. Second, the server 5 with a light load on the server 56
There is a method of selecting 6. In this method, the narrow band wireless base station 53 observes the load of the server 56 and selects the server 56 having a small load. Thirdly, there is a method of selecting the server 56 in which the load on the network 57 is light. This method is performed by the narrow band wireless base station 53 and the server 56.
This is a method of trying to use a communication path with a low traffic. As a fourth method, the above 3
Among the methods, there is a method in which at least two or more methods are combined. As this method, for example, the narrow band wireless base station 53 observes the load of the server 56, and selects the server 56 closest to the narrow band wireless base station 53 from the servers 56 whose load is smaller than a certain value. There are ways. After the server 56 is selected using the selection method as described above, a communication line from the narrowband wireless base station 53 to the server 56 is acquired, and as a result,
A communication line from the wireless mobile station 51 to the server 56 is acquired.

38th Embodiment: As shown in FIG. 63 (c), a specific logical number is assigned to each service,
The user makes a call by using a logical number corresponding to the service desired to be received. The calling method includes a method in which the user directly dials up a logical number, and a method in which the user selects a service item displayed on the wireless mobile station 51. This method will be described as a system according to the 38th embodiment. In this method, when the user selects a service, the corresponding logical number is automatically dialed up.
Whichever method is used, when a call is made to the server 56, first, the wireless mobile station 51 moves to the narrow band wireless base station 53.
A communication line to is acquired.

Next, the narrow band wireless base station 53 is operated by the server 5
Connect with 6. When there is only one server 56 that provides the desired service on the network 57, a communication line from the narrow band wireless base station 53 to the server 56 is acquired. If there are a plurality of servers 56 that provide the desired service on the network 57, the server 56 to which the narrowband wireless base station 53 connects.
Select. The selection method is the same as that in the 39th embodiment, and will not be repeated here. When the server 56 is selected, a communication line from the narrow band wireless base station 53 to the server 56 is acquired, and thus a communication line from the wireless mobile station 51 to the server 56 is acquired.

Thirty-ninth embodiment: The wireless mobile station 51 indicates whether or not it can communicate with the wireless base station. Specifically, both of whether the own station can communicate with the narrowband wireless base station 53 and whether the own station can communicate with the wideband wireless base station 52 are displayed. As a display method, a method of displaying the signal strength of the radio wave from each base station stepwise (see FIG. 64)
(A)) and a method of displaying whether or not communication is possible in a binary manner (FIG. 64 (b)). Further, in order to perform the above-mentioned display, the wireless mobile station 51 measures the received electric field strength when receiving the signal transmitted from the broadband wireless base station 52,
A means for displaying the measurement result by a human-recognizable expression method and a method for displaying the measurement result by a human-recognizable electric field strength when a signal transmitted from the narrowband wireless base station 53 is received. It has both a means to display.

The thirty-ninth embodiment makes it possible for the user to recognize what kind of service he can receive. In other words, the user can recognize that he / she can receive the service using the narrow band downlink wireless channel but cannot receive the service using the wide band downlink wireless channel. It becomes possible to recognize that it has become possible to receive services using the channel. Therefore, for example, when the user is located outside the service area of the broadband wireless base station 52, the broadband downlink wireless channel is used after moving to the service area of the broadband wireless base station 52 without receiving the service at the local point. It is possible for the user to select which of the high-speed wireless transmission service or the low-speed wireless transmission service using the narrow-band downlink wireless channel at the present time. Also,
Two steps regarding the signal transmitted from the broadband wireless base station 52 (when the wireless mobile station 51 receives the first signal transmitted from the broadband wireless base station 52 via the wireless line,
Measuring the received electric field strength of the first signal;
The step of displaying the received electric field strength of the first signal by a human-recognizable expression method) and the following two steps regarding the signal transmitted from the narrow band wireless base station 53 (the wireless mobile station 51 is a narrow band wireless base station). Measuring the received electric field strength of the second signal when receiving the second signal transmitted from the device via the wireless line, and a method of expressing the received electric field strength of the second signal by a human being. Steps to be displayed) are independent steps. Therefore, the user can request the wideband wireless base station 52 to the wireless mobile station 51.
If it is set in advance not to receive the high speed transmission service via the, the method of not performing the two steps regarding the signal transmitted from the broadband wireless base station 52 may be considered. In this case, the power consumption of the wireless mobile station 51 can be reduced. As described above, the 31st aspect of the present invention
According to the thirty-ninth embodiment, even in a system such as an SDL system that includes a wireless mobile station that does not have a broadband upstream wireless channel as its component, the server can connect to which broadband wireless base station the wireless mobile station can connect to. It is possible to recognize whether there is any, and it is possible to provide the service. Further, even if a handover needs to be performed due to the movement of the wireless mobile station, the server can recognize the broadband wireless base station of the handover destination and can continuously provide the service. It will be possible.

Similar to FIG. 43, FIG. 65 shows a radio communication system according to the 40th embodiment, which comprises a PHS base station, a wired network and an SDL-Net base station.
It differs from FIG. 43 in that the SDL-Net base station is equipped with a PHS receiver and that there is no reference transmitter on the network side. As shown in FIG. 44, the SDL-Net base station is
It exists inside the PHS service area. for that reason,
It is possible to synchronize the clocks of PHS and SDL-Net by inputting the signal received by the PHS receiver to the synchronization circuit.

FIG. 66 shows a 41st embodiment as an overall configuration to which the radio communication system according to the present invention is applied. A plurality of base stations BS having a predetermined communication service area, a plurality of databases and a communication satellite CS are communicably connected via a network.

[0168]

As described above in detail, in the wireless communication system according to the present invention, the transmission rate of the wireless signal on the uplink line is set to be relatively low and the transmission rate of the wireless signal on the downlink is set to be relatively low. Since the transmission speed is relatively high, a large amount of user information can be transmitted from the base station to the terminal at high speed, the user's request can be sufficiently satisfied, and the frequency can be effectively used.

[Brief description of drawings]

FIG. 1 is a block diagram showing the basic concept of the present invention.

FIG. 2 is a block diagram showing a wireless communication system according to a first embodiment of the present invention.

FIG. 3 is a block diagram showing a wireless communication system according to a second embodiment of the present invention.

FIG. 4 is an explanatory diagram showing a wireless communication system according to a third embodiment of the present invention.

FIG. 5 is a block diagram showing a wireless communication system according to a fourth embodiment of the present invention.

FIG. 6 is an explanatory diagram showing an example of a communication form.

FIG. 7 is an explanatory diagram showing another example of a communication mode.

FIG. 8 is a block diagram showing another configuration example of the basic concept of the present invention.

FIG. 9 is a block diagram showing the configuration of a fifth embodiment of the present invention.

FIG. 10 is a diagram showing an embodiment showing the usage status of the memory space in the embodiment of FIG.

FIG. 11 is a block diagram showing an example of an SDL system to which the present invention is not applied.

FIG. 12 is a diagram showing frequency allocation of a wireless communication system.

FIG. 13 is a conceptual diagram showing a wireless communication system according to a thirteenth embodiment of the present invention.

FIG. 14 is a diagram showing frequency allocation in the thirteenth embodiment of the present invention.

FIG. 15 is a conceptual diagram showing a wireless communication system according to a fourteenth embodiment of the present invention.

FIG. 16 is a diagram showing frequency allocation in the fourteenth embodiment of the present invention.

FIG. 17 is a conceptual diagram showing a wireless communication system according to a fifteenth embodiment of the present invention.

FIG. 18 is a diagram showing frequency allocation in the fifteenth embodiment of the present invention.

FIG. 19 is a conceptual diagram showing a wireless communication system according to a sixteenth embodiment of the present invention.

FIG. 20 is a diagram showing frequency allocation in the sixteenth embodiment of the present invention.

FIG. 21 is a block diagram showing a wireless communication system according to a seventeenth embodiment of the present invention.

FIG. 22 is a block diagram showing a wireless communication system according to an eighteenth embodiment of the present invention.

FIG. 23 is a block diagram showing a wireless communication system according to a nineteenth embodiment of the present invention.

FIG. 24 is a block diagram showing a wireless communication system according to a twentieth embodiment of the present invention.

FIG. 25 is a block diagram showing a wireless communication system according to a twenty-first embodiment of the present invention.

FIG. 26 is a block diagram showing a wireless communication system according to a twenty-second embodiment of the present invention.

FIG. 27 is a block diagram showing a wireless communication system according to a 23rd embodiment of the present invention.

FIG. 28 is a block diagram showing a wireless communication system according to a twenty-fourth embodiment of the present invention.

FIG. 29 is a block diagram showing a wireless communication system according to a twenty-fourth embodiment of the present invention.

FIG. 30 is a diagram showing a service area of a wireless communication system according to a twenty-fifth embodiment of the present invention.

FIG. 31 is a diagram showing an operation of a portable electronic device used in the wireless communication system according to the twenty-fifth embodiment of the present invention.

FIG. 32 is a diagram showing the configuration of a frequency divider in a twenty-fifth embodiment of the present invention.

FIG. 33 is a diagram showing a configuration of a mobile electronic device used in a wireless communication system according to a twenty-sixth embodiment of the present invention.

FIG. 34 is a diagram showing a service area of a wireless communication system according to a twenty-sixth embodiment of the present invention.

FIG. 35 is a diagram showing a configuration of a receiver included in a timing clock recovery circuit.

FIG. 36 is a diagram showing a configuration of a receiver for configuring a timing clock recovery circuit according to a twenty sixth embodiment of the present invention.

FIG. 37 is a diagram showing input / output signals of a carrier reproduction / timing reproduction circuit in a twenty-seventh embodiment of the present invention.

FIG. 38 is a diagram showing input / output signals of a reference signal generation circuit in the twenty-seventh embodiment of the present invention.

FIG. 39 is a diagram showing a configuration of a frame timing clock recovery circuit.

FIG. 40 is a diagram showing the configuration of a frame timing clock recovery circuit according to a twenty-eighth embodiment of the present invention.

FIG. 41 is a diagram showing a configuration of a clock recovery circuit.

FIG. 42 is a diagram showing the configuration of a clock synchronization circuit according to the 29th embodiment of the present invention.

FIG. 43 is a diagram showing the configuration of a wireless communication system according to the thirtieth embodiment.

FIG. 44 is a diagram showing the configuration of a clock synchronization circuit in the thirtieth embodiment of the present invention.

FIG. 45 is a block diagram showing a general concept of a wireless communication system according to examples 31-39 of the present invention.

FIG. 46 is a diagram showing the overall configuration of a wireless communication system according to Examples 31-39 of the present invention.

FIG. 47 is a diagram showing another overall configuration of a wireless communication system according to the 31st to 39th embodiments of the present invention.

FIG. 48 is a diagram showing the manner of movement of the wireless mobile station in the wireless communication system according to the 31st to 36th embodiments of the present invention.

FIG. 49 is a flowchart showing the processing steps of a wireless communication system according to the 31st embodiment of the present invention.

FIG. 50 is a flowchart showing the processing steps of service start in the wireless communication system according to the thirty-first embodiment of the present invention.

FIG. 51 is a sequence diagram showing a communication start procedure of the wireless communication system according to the 31st embodiment of the present invention.

FIG. 52 is a flowchart showing processing steps of the wireless communication system according to the 32nd embodiment of the present invention.

FIG. 53 is a flowchart showing the processing steps of service start in the wireless communication system according to the thirty-second embodiment of the present invention.

FIG. 54 is a sequence diagram showing a communication start procedure of the wireless communication system according to the 32nd embodiment of the present invention.

FIG. 55 is a flowchart showing the processing steps of a wireless communication system according to the 33rd embodiment of the present invention.

FIG. 56 is a sequence diagram showing a communication start procedure of the wireless communication system according to the 33rd embodiment of the present invention.

FIG. 57 is a flowchart showing the processing steps of a wireless communication system according to the 34th embodiment of the present invention.

FIG. 58 is a sequence diagram showing a communication start procedure of the wireless communication system according to the 34th embodiment of the present invention.

FIG. 59 is a flowchart showing the processing steps of a wireless communication system according to the 35th embodiment of the present invention.

FIG. 60 is a sequence diagram showing a communication start procedure of the wireless communication system according to the thirty-fifth embodiment of the present invention.

FIG. 61 is a flowchart showing the processing steps of a wireless communication system according to the 36th embodiment of the present invention.

FIG. 62 is a sequence diagram showing a communication start procedure of the wireless communication system according to the 36th embodiment of the present invention.

63A and 63B are plan views showing a radio mobile station used in the radio communication system according to the 37th embodiment of the present invention, and FIG. 63C is used for the system according to the 38th embodiment. The top view which shows a wireless mobile station.

64 (a) and 64 (b) are plan views showing a radio mobile station used in the radio communication system according to the 39th embodiment of the present invention, respectively.

FIG. 65 is a diagram showing the configuration of a wireless communication system according to the 40th embodiment of the present invention.

FIG. 66 is a diagram showing the configuration of a wireless communication system according to a forty-first embodiment of the present invention.

FIG. 67 is a diagram showing a configuration of a conventional PLL.

FIG. 68 is a diagram showing a frequency arrangement of a conventional wireless trial system.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 terminal 2 low speed transmitting means 3 high speed receiving means 4 uplink line 5 base station 6 low speed receiving means 7 high speed transmitting means 101, 103 ... Radio equipment 501, 701, 1301, 1401, 1501, 16
01, 1701 ... Radio base stations 102, 302, 502, 702, 1302, 140
2, 1502, 1602, 1702 ... Wireless terminal 901, 903 ... Antenna 902, 1002, 1004, 1102, 1203, 1
304, 1605, 1606, 1608 ... Receiving device 904, 1005, 1101, 1201, 1306, 1
603, 1604, 1607 ... Transmitting device 1303 ... Infrared transmitting device 1305 ... Infrared receiving device

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Takashi Wakutsu Takashi Wakuzu 1 Komukai Toshiba-cho, Sachi-ku, Kawasaki-shi, Kanagawa Toshiba Research & Development Center (72) Inventor Minoru Minoru, Saiwai-ku, Kawasaki-shi, Kanagawa Mukai Toshiba-cho 1 Co., Ltd. Toshiba Research & Development Center (72) Inventor Nobuyasu Nakajima Komukai-shi, Kawasaki-shi, Kanagawa 1 Komatsu Mukai Toshiba Research & Development Center (72) Inventor Kamagata Eiji Kanagawa Komukai Toshiba Town, Kawasaki City, Kawasaki Prefecture, Ltd. 1 Toshiba Research and Development Center, Ltd. (72) Inventor Katsuya Komukai Toshiba Town, Kawasaki City, Kawasaki City, Kanagawa Prefecture 1. Person Toshimitsu Kiyoshi 1 Komukai Toshiba-cho, Sachi-ku, Kawasaki-shi, Kanagawa Stock Company Toshiba Research and Development Center

Claims (8)

[Claims] 1. A base station, a terminal, an uplink provided between the terminal and the base station for wirelessly transmitting predetermined information from the terminal to the base station, and between the base station and the terminal. In a wireless communication system including a downlink for wirelessly transmitting predetermined information from a base station to a terminal, a relatively low-speed transmission to the base station via the uplink provided in the terminal A low-speed transmitting means for transmitting a radio signal at a speed; a low-speed receiving means provided in the base station for receiving a radio signal transmitted from the terminal at a relatively low transmission rate via the uplink; A high-speed transmission means provided in a base station for transmitting a radio signal at a relatively high transmission rate to the terminal via the downlink; and a high-speed transmission means provided in the terminal via the downlink. A wireless communication system, comprising: a high-speed receiving unit that receives a wireless signal transmitted from a base station at a relatively high transmission rate. 2. At least one uplink line and at least one downlink line are provided, two or more types of radio signal transmission rates are provided for each line, and one transmission rate of a corresponding pair of lines is provided. 2. The wireless communication system according to claim 1, wherein at least one set of lines having a ratio of one transmission rate to the other transmission rate is an integer ratio is provided. 3. A plurality of base stations, a plurality of terminals, and an uplink configured between each base station and each terminal for wirelessly transmitting predetermined information from the terminal to the base station.
In a wireless communication system including a downlink for wirelessly transmitting predetermined information from the base station to the terminal, which is set between the individual terminals and the individual base stations, the terminal is provided with the up link. A low-speed transmission means for transmitting a radio signal in a relatively low frequency band at a relatively low transmission rate to the base station via a link, and provided in the base station via the uplink. And a low-speed receiving means for receiving a radio signal sent from the terminal at a relatively low frequency and at a low transmission rate, and provided in the base station to the terminal via the downlink. A high-speed transmission means for transmitting a radio signal in a relatively high frequency band at a relatively high transmission rate, and a high frequency transmission means provided in the terminal for relatively high frequency transmission from the base station via the downlink. so, A wireless communication system comprising: a high-speed receiving unit that receives a wireless signal sent at a high transmission rate. 4. The high-speed transmission means transmits large-capacity user information sent from the base station to the terminal via a radio signal in a high-frequency band through the downlink, and the low-speed transmission means comprises the terminal. The wireless communication system according to claim 3, wherein the small-capacity control information transmitted from the base station to the base station is transmitted via a radio signal in a low frequency band via the uplink. 5. A base station, a terminal, an uplink provided between the terminal and the base station for wirelessly transmitting predetermined information from the terminal to the base station, and the base station and the terminal. In a wireless communication system including a downlink for wirelessly transmitting predetermined information from a base station to a terminal, the wireless communication system is provided in the terminal and is relative to the base station via the uplink. A first low-speed transmitting means for transmitting a radio signal at a low transmission rate, and a radio signal received at a relatively low transmission rate from a terminal provided in the base station via the uplink. A first low-speed receiving means for transmitting a wireless signal for information having a relatively low transmission rate to the terminal via a first downlink, the first low-speed receiving means for transmitting the wireless signal. 2 low speed delivery Means and the second receiving radio signals on less information amount of information sent by the relatively slow transmission rate from the base station via the first downlink provided to the terminal
Low-speed receiving means, high-speed transmitting means provided in the base station for transmitting a radio signal to the terminal at a relatively high transmission rate via the second downlink, and provided in the terminal. High-speed transmission means for receiving a radio signal transmitted at a relatively high transmission rate from the base station via the second downlink. 6. The first low-speed transmission means transmits small-capacity control information from the terminal to the base station via the uplink by a radio signal belonging to a relatively low frequency band, The second low-speed transmission means transmits a control signal and a voice signal having a small amount of information to the terminal via the first downlink from the base station by a radio signal belonging to a relatively low frequency band, The said high-speed transmission means transmits large-capacity user information to the said terminal through the said 2nd downlink from the said base station by the radio signal which belongs to a relatively high frequency band. Wireless communication system. 7. A wideband wireless base station, wherein a wireless mobile station receives a signal for identifying the wideband wireless base station broadcast from the wideband wireless base station via a wireless line, and is suitable for connection from the received signal. Connection optimal station interpretation means for interpreting stations,
The wireless mobile station transmits the specific wideband wireless base station to which the connection is suitable to the server via a narrowband wireless base station, and the server connects to the wireless mobile station. 2. The wireless communication system according to claim 1, further comprising: a service starting unit that starts the predetermined service via the specific broadband wireless base station determined to be suitable for the wireless communication system. 8. In addition to the above-mentioned respective means, the wireless mobile station,
When the predetermined service is received via the specific broadband wireless base station to which the connection is suitable, the broadband wireless base station different from the specific broadband wireless base station is notified via the wireless line. Means for receiving a signal for identifying the broadband wireless base station, interpreting a broadband wireless base station suitable as a connection switching destination from the received signal, and the wireless mobile station is suitable as a connection switching destination. Means for notifying the server of the specific wideband radio base station being present to the server via the narrowband radio base station, and the server is determined to be suitable as a connection switching destination for the radio mobile station. Means for switching the connection so as to connect via the specific broadband wireless base station and connecting and providing the predetermined service.
The wireless communication system according to.