JP2586504B2 - Communication method and system for mobile communication - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a mobile communication method and system.
Furthermore, the present invention relates to a communication method and a system that satisfies the communication quality when the communication quality deteriorates due to the movement of the communicating mobile terminal in the mobile communication using the small zone configuration.

More specifically, it is an object of the present invention to provide a communication method and a system which are excellent in an effective frequency utilization rate, a communication quality, a control capability of a radio channel, and the like.

[Prior Art] In general, when performing mobile communication in a wide service area, a system in which one radio base station covers the entire area and communicates with a mobile in the service area is called a large zone method. Calling. On the other hand, the small zone method divides a service area into a plurality of small areas, installs one radio base station in each of the divided areas, and sets a mobile radio station in each area. The device communicates with these radio base stations.

The conventional small zone system is adopted, for example, in the car telephone system of NTT (Nippon Telegraph and Telephone Corporation) currently in commercial service. In this case, the mobile radio device mounted in the car moves away from the radio base station of the call partner station by running the car. For example, when the radio base station is 5 to 7 km or more from the radio base station, the input electric field value of the radio wave decreases. As a result, the quality of the call deteriorates. Therefore, in the small zone configuration, the radio base stations are installed at a distance of 10 to 12 km from each other in the service area. Therefore, in the above case, another radio base station must be located near the current position of the automobile (within 5 to 5 km). There is a call between the new radio base station and the mobile radio using another radio channel. In the NTT system, a radio network controller that controls the setting and release of calls on the radio network is installed to control many radio base stations and mobile radios, and the radio network controller serves as an interface. It is connected to the general telephone network via a gateway exchange. When the call quality deteriorates, the radio network controller causes a plurality of radio base stations in the vicinity of the mobile radio to receive the communication radio waves of the mobile radio, and a specific radio base station transmits the radio wave to the specific radio base station. If it is determined that the desired communication quality can be maintained by setting a new radio channel between the mobile radio and the radio base station, the new channel is set.

FIG. 9 is a conceptual diagram showing the configuration of a conventional system performing such an operation, and will be described with reference to FIG.

In FIG. 9, each zone 14A, 14B, 14C, 14D having a radius of about 5 to 7 km surrounded by four circles is defined as a service area of a car telephone, and a mobile radio 15 mounted in a car now.
Is communicating with the wireless base station 13A in the zone 14A.
Since the automobile is traveling from zone 14A to zone 14C, the relative distance between radio base station 13A and mobile radio 15 is increasing. Assuming that the communication is ongoing and the vehicle moves from zone 14A to zone 14C, the distance between the radio base station 13A and the mobile radio 15 is 5 to 7 km or more, and the input electric field value of the mutual received radio wave And the transmission quality drops below a certain transmission quality. The state of this quality deterioration
The radio base station 13 is constantly monitored by the radio network controller 12, and when the quality drops below a certain standard, the radio base stations 13B, 13C, and 13D around the radio base station 13A and the radio base station 13A and the mobile radio 15 The radio channel in use (channel CH1
Assume that quality is measured. Upon receiving this request, the radio base stations 13B, 13C, and 13D tune their own radio channel search receivers (not shown) to the channel CH1 to receive signals, and change the state of the radio channel control station 12 Report to Upon receiving this report, the radio network controller 12 compares the values of the reception input electric fields E _B , E _C , and E _D of the radio base stations 13B, 13C, and 13D, and finds that E _C > E _B , E _C > E a _D, and the E _C confirms that a constant quality is ensured even from the standpoint of transmission quality, the radio channel control station 12 is deemed to have migrated from the zone 14A to the zone 14C, zone 14
Procedure to disconnect the wireless channel CH1 used in A and use an unused channel (assuming channel CH10) among the wireless channels available in the wireless base station 13C in the zone 14C, that is, call Start medium channel switching.

References: Yoshikawa et al., "Mobile Phone Radio Network Control," Nippon Telegraph and Telephone Research Institute of Telecommunications Research and Application Vol.26, No.
7 This will be described with reference to page 1885.

(1) The channel switching signal uses a control line included in each transmission line 16 between the radio network controller 12 and each radio base station 13,
A wireless communication channel is used between each wireless base station 13 and the mobile wireless device 15.

(2) The channel switching signal is transmitted from, for example, the radio base station 13A, which had previously communicated, to the mobile radio device 15, and the radio continuity test tone is newly switched, for example, from the radio base station 13C. It is sent to the mobile radio 15.

(3) If the mobile radio 15 cannot receive the radio continuity test tone, it returns to the old communication channel set with the radio base station 13A to continue the communication.

The above (1) to (3) are the channel switching during a call currently used by NTT. As is clear from these descriptions, the following noise is generated in the caller, that is, the car telephone user, in the call. Will be mixed. (A) A control signal for switching according to the above (1) (in this case, a digital signal of 300 bits / second) is received in such a form that it is inserted into a busy channel after the signal of the other party is cut off. Since it appears on the output of the machine, it is mixed during a call as an audible sound of about 300 Hz, during which the call is disconnected.

(B) During the call test (2), there is no noise but no sound. During this period, the other party's voice is not transmitted to the other party, and the own voice is not transmitted to the other party (disconnected).

The duration of the call disconnection in (a) and (b) above is 0.7
It is said to be ~ 0.8 seconds. On the other hand, the radio network controller 12 instructs the radio base station 13C to start a call with the mobile radio device 15 using, for example, the channel CH10 via the transmission path 16C between them. This instruction is also performed at the same time as the above-described continuity test.
Terminates communication with the mobile radio 15 and replaces it with the radio base station.
13C starts communication with the mobile wireless device 15. Further, the radio network controller 12 wirelessly transmits a call path switch SW in the gateway exchange 19 for connecting each radio base station 13 to the telephone network 10 to a gateway exchange 19 which interfaces with the telephone network 10. A request is made to switch from base station 13A to 13C. That is, the A-4 switch is turned on (displayed with a blank triangle) and the C-4 switch is turned on (displayed with a black triangle) with the communication path switch SW shown in FIG.

By the above operation, using the mobile radio device 15 in the car, any telephone in the telephone network 10 and the car are in the zones 14A,
No matter where you move to 14B, 14C, or 14D, the call will continue.

Thus, the user (caller) is given a technical guarantee that he can make a call anytime and anywhere while driving a car within the service area, and in actual service, he makes full use of this technology. Service has been performed.

In mobile communication adopting such a small zone configuration,
The following features not found in the large zone system can be exhibited.

(A) The radio wave from one radio base station is used only in a small area, and a number of radio base stations are arranged in a service area to repeatedly use the same frequency. Became possible.

(B) With the advent of digital synthesizers, it is possible to switch and use hundreds of radio channels for mobile radios, and to perform radio communication between these many mobile radios and radio base stations. Since the technology for setting and controlling the line has been established, it has become possible to contribute to the effective use of the frequency in the item (a).

(C) The radio channel control technology required for setting and controlling the radio channel for outgoing / incoming calls, etc., has been established efficiently for a large number of mobile radios, which also contributed to the features of (a). During the communication of the wireless device, it is also possible to switch the wireless channel during communication according to the zone shift.

[Problems to be Solved by the Invention] However, in the conventional method as exemplified in FIG. 9, technical measures are insufficient or no measures are taken, and users feel inconvenience. There is a problem that satisfactory services cannot be provided, and the system has been required to further promote effective use of frequencies and to improve serviceability.

 Such a problem will be described below.

i) In order to effectively use the frequency, it is necessary to reduce the zone radius of one zone in the small zone configuration, but if this becomes too small, the mobile radio device may pass through one zone during communication. The probability of moving to another zone increases. Then, it is necessary to frequently change the radio channel assigned to each zone at the time of zone transition, and at this time, it is necessary to change the old radio channel to the new radio channel for both the radio base station and the mobile radio. Conventionally, this change was made by the radio network controller 12 (FIG. 9). However, the communication quality was degraded due to a temporary interruption of communication due to the change of the channel.

ii) There has been an example in which mobile wireless devices having different transmission powers are introduced into the same system and operated as devices in one system. This means, for example, a mobile radio installed in a car (5W transmission output for an NTT car phone) and a mobile phone that accesses a radio base station for a car phone that users can carry outdoors. In the case of NTT, the transmission output is 1W), which is housed in the same system. However, since the wireless equipment housed in the wireless base station can be shared, an economical system can be constructed.

However, from the viewpoint of effective use of frequency, in order to complicate the rule making for reuse of the same frequency, in addition to acting in a direction to reduce the effect of effective use,
The difference in the transmission power level increases the possibility of interference caused by other mobile radios. In order to prevent this, the cost was increased and the frequency was not effectively used.

The reuse of the same frequency can be dealt with by improving the control capability, but this is also limited, and if the zoning progresses to a certain extent, it will become impossible to control or the cost will be completely offset. There is no system. The interference has not been solved by the conventional method and has been a major problem in the conventional system.

Therefore, from the viewpoint of effective use of frequency, there is a limit in effective use, and it has not been possible to satisfy the demand in terms of utilizing limited radio wave resources.

iii) With the progress of sub-zones, in a sub-zone covered by one radio base station, a situation in which the sub-zone covered by an adjacent radio base station or the next adjacent radio base station overlaps often occurs,
When a conventional technique is used as a wireless channel control technique, there is a possibility that control becomes impossible.

This is because the radio wave propagation characteristics are greatly affected (propagation loss) by the influence of the terrain and structures in one small zone. This effect is due to the advancement of small zones in order to make effective use of frequency, and the range of one small zone is reduced (radius 1 km
Below), it becomes relatively large. In addition, a relatively high level transmitter is used for the radio base station and the mobile radio to be used, so that good communication can be ensured even in a place affected by terrain and structures. This means that a wireless base station located far away and a mobile wireless device located in another zone can communicate with each other in a place where there is no influence from the terrain or the structure.

Therefore, one small zone is managed by one radio base station, and the original concept of covering a wide plane serving as a service area disappears by many small zones. A service area has been formed.

As a result, to operate the small zone system in such a state smoothly, in the related art, it is necessary to frequently set, change and release the radio communication path,
As a result, the performance of the radio line controller is greatly exceeded.
Therefore, it is practically impossible to secure a smooth communication path, and conversely, consideration has been given to the system configuration in how to avoid such a situation.

iv) In mobile communication, the communication quality is greatly changed due to the influence of radio wave propagation characteristics accompanying the movement of the mobile body, and the communication quality is required for the system in places where radio waves are poorly transmitted. There was a problem that the value was less than the value. In order to solve this, various measures such as diversity technology have been taken, but all of them have problems such as not only increasing the cost of the equipment but also impairing the effective use of the frequency.

In addition, it is considered that a call disconnection due to a shift between zones during a call is a kind of communication quality problem, and a solution is required from the viewpoint of quality assurance.

v) No measures have been taken against traffic fluctuations in communication within the system.

Traffic fluctuations in the communication within the system, for example, are usually extremely low in the middle of the night or early morning in public communication, around 10 am and 2 pm in the daytime, and in car phones,
Large traffic peaks can be seen at 5 to 6 in the evening, but if the system design is designed to function satisfactorily even during the maximum traffic, the system components will be idle during off-peak hours, and the cost will increase. If a suitable system is constructed during off-peak hours, the cost will be extremely low, but it will be unavailable during the busiest time, and a decline in serviceability cannot be avoided.

In addition, when communication traffic is low, high-quality services can be provided by effectively utilizing idle facilities in the system, and the system facilities that shift to normal services as traffic increases can be used effectively. It lacked the concept of using it. One of the reasons for this is considered to be a sudden increase in system cost when trying to solve the problem by the conventional technology.

Also, for example, when all the transceivers of the wireless base station are in use, even a very short and fixed signal such as a position registration signal transmitted from a mobile wireless device has no processing capability in the conventional system. However, it has been a technical constraint on the progress of the miniaturization.

vi) Conventionally, location registration of a mobile unit performing communication has been performed by registering and processing only data received by one radio base station at the same time. In a system that changes sequentially at a considerable frequency, or in a system in which the location registration method is restricted due to the effective use of frequency, a call to a mobile unit cannot be made due to insufficient location registration.

This is because the wireless transceiver installed in the wireless base station is one
In the case of only a channel, it must be used in a time-sharing manner for control and communication, and when there is a location registration request from another mobile radio in the same zone while communicating with the mobile radio. Had noticeable adverse effects.

vii) The technology for providing mobile communication services using broadband signals is incomplete and unfinished, giving users inconvenience.

Conventionally, mobile communication services that are widely used are mainly telephones, and those that use a wide frequency band, such as high-speed data signals, are rarely used. This is because, in mobile communication, since the radio wave propagation characteristics change greatly with the movement of the mobile body, there has been a shortage of techniques for receiving wideband signals satisfactorily.

viii) Radio link control ability and reliability were insufficient. Conventionally, the setting and release of a wireless line or the execution of channel switching during a call are performed by a wireless line control station or a wireless system control device installed to perform control in one place in a certain area. Was. This is effective for centralized control of line control by centralization.
If this causes a failure, it will be a fatal accident that all systems will go down. Therefore, countermeasures such as hardware duplication have been taken, but the cost has been increased and satisfactory results have not been obtained.

ix) In conventional mobile communication on land, except for special cases, estimation of the moving direction of a moving body during communication has not been performed due to technical difficulties. For this reason, effective information such as the radio link traffic situation in the area in the moving direction cannot be obtained, and a problem remains in effective use of frequency or traffic management.

x) An instantaneous interruption occurs when switching a busy channel between zones or within a zone, which has also been a major obstacle to miniaturization.

In the call channel switching method implemented by NTT described with reference to FIG. 9, the call is temporarily disconnected (0.7 to 0.8 seconds) when the wireless channel is switched, and a control signal other than the call signal (300 bits) is used. / S) is partly mixed and has a drawback. If there is such a temporary interruption of the call line or noise is mixed in, if the content of the call is voice, it can be compensated by re-listening, etc.
Although not a major obstacle, when a facsimile terminal is installed in a car and used for transmission and reception, if there is a channel change during operation, for example, in a 1-minute facsimile, the 0.8 / 60 portion of the page will be marked with a black line ( Or a white line), and the received image quality is greatly deteriorated.
In the case of data communication, for example, in a data signal of 1200 baud, a signal of about 1000 bits is lost, so a procedure such as retransmission is required.

In addition, there is a method of removing noise by using silence during channel switching or using out-of-band signals in order to remove noise.However, even if the purpose of removing the noise can be achieved, the time of line disconnection is still Because of its existence, there remains a problem that it has no effect at all in removing the adverse effects on facsimile and data signals.

[Means for Solving the Problems] A plurality of wireless base stations including a wireless transceiver and an ID identification storage unit, a group of switches connecting the plurality of wireless base stations to a telephone network, and a communication path controlling the group of switches A gateway exchange including a control unit and an ID identification storage unit, and a plurality of channels for simultaneously communicating the same communication signal with a plurality of wireless base stations while moving within a service area covered by the plurality of wireless base stations. And a radio receiver circuit for simultaneously receiving (diversity reception) by switching at a speed sufficiently faster than the frequency of the communication signal, and simultaneously transmitting by switching a plurality of channels at a speed sufficiently faster than the frequency of the communication signal ( And a mobile radio including a radio transmission circuit for performing diversity transmission.

[Operation] A plurality of radio base stations and a mobile radio are communicating in parallel by using a plurality of channels to switch the same communication content at a speed sufficiently higher than the frequency of the communication signal. If a channel (old channel) in which the communication quality is below a certain value occurs during communication, another channel (new channel) with another wireless base station that satisfies the certain communication quality. Channel), the communication of the old channel is terminated, and the same communication contents can be communicated without interruption by diversity transmission and reception using a plurality of channels including the new channel. As a result, the following actions and effects could be obtained.

i) Each wireless base station and the gateway exchange are provided with an ID identification storage unit, and the position of the mobile wireless device is registered in parallel based on the data of each wireless base station, thereby improving the reliability of the position registration. .

ii) Diversity transmission / reception is performed by switching one channel having deteriorated communication quality among a plurality of channels to a new channel, so that communication (communication) between or within zones is performed.
Instantaneous interruption of medium channel switching was realized.

iii) The use of economical transmission / reception diversity has ensured good communication quality, that is, reduced interference and technically enabled new services using wideband signals.

iv) When traffic is low, parallel communication is performed using many channels, so that effective use of wireless equipment is achieved and communication quality is improved.

v) Each radio base station is provided with an ID identification storage unit and a function that enables simultaneous transmission / reception (diversity transmission / reception) of a plurality of radio channels by high-speed switching, so that the location registration signal from the mobile radio device can be used even during peak traffic. Processing became possible.

vi) The transmission characteristics of wideband signals were improved by the parallel communication of multiple channels, and the line quality was improved.

vii) It is possible to estimate the moving direction and speed of the mobile wireless device, to secure communication in the destination zone and to perform prior allocation of channels used in the expected destination zone.

viii) The control of the radio link has been improved from the centralized type as in the conventional system to the mobile radio or the radio base station, thereby improving the control processing capability and the system reliability.

Embodiment FIG. 1A, FIG. 1B, and FIG. 1C show an example of a system configuration for explaining an embodiment of the present invention.

In FIG. 1A, reference numeral 10 denotes a general telephone network, which includes an exchange 11 for general telephones. Reference numeral 20 denotes a gateway exchange for exchange-connecting an ordinary telephone exchange 11 included in the telephone network 10 with a wireless system. Gateway exchange 20
Is used to connect a plurality of radio base stations 30-1, 30-2,..., 30-n and many mobile radios to a telephone housed in a general telephone network 10, A communication path control unit 21 that performs transmission and reception of control signals between the stations 1 to 30-n and controls release of a communication path, and the like, and each of the radio base stations 30-1 to 30 controlled by the communication path control unit 21. Switches required for switching communication paths for connection between 30-n and gateway exchange 20 and exchange 11
23 and are included.

FIG. 1B shows a mobile radio device 50 communicating with each of the radio base stations 30-1 and 30-2. The reception signal received by the antenna unit enters a wireless reception circuit 68 including a reception mixer 63 and a reception unit 53, and a communication signal output from the reception unit is input to a control unit 58 and a telephone unit 59. A communication signal output from the telephone unit 59 is transmitted to a wireless transmission circuit including a transmission mixer 61 and a transmission unit 51.
66, the transmission signal is transmitted from the antenna unit,
Received by the wireless base station 30. Also, the communication quality during communication is constantly monitored, and when the quality deteriorates, the communication quality monitoring unit 57 that reports the deterioration to the control unit 58 and the presence or absence of interference during communication are monitored, and a certain amount or more of interference is detected. In this case, the ID of the interference detector 62 or the mobile radio device 50 that reports it to the control unit 58 or the zone in which the user is located is identified and stored. An area information matching storage unit 54 is provided with connections as shown.

The mobile radio 50 further includes synthesizers 55-1 and 55-
2,…, 55-n and 56-1,56-2,…, 56-n and changeover switch 64
-1, 64-2 and a reception switching controller 65C that generates a signal for performing switching control of the changeover switches 64-1 and 64-2, respectively.
And a transmission switching controller 67C, and the synthesizers 55-1 to 55-n and 56-1 to 56-n, and both switching controllers 65C and 67C are controlled by the control unit 58. A reference frequency is supplied from a reference crystal oscillator 71 to each of the synthesizers 55-1 to 55-n and 56-1 to 56-n.

FIG. 1C shows a radio base station communicating with the mobile radio 50.
Reference numeral 30 (for example, 30-1) is shown, which is substantially the same as the configuration of the mobile radio device 50 shown in FIG. 1B, and differs from the transmission and reception switching controllers 55-1 to 55-. n, 56-1〜56-
n, changeover switches 64-1 and 64 for switching the synthesizer
-2, ID / ROHM area information collation storage unit 54 (1B
No figure) and the synthesizer has 35-1 and 3-3 for reception and transmission.
6-1 each, and has an ID identification storage unit 34 for identifying and storing the ID numbers of itself and the called party, and has no telephone unit 59 (FIG. 1B). An alternative is that an interface 39 to the gateway exchange 20 is provided.

Components of FIG. 1C corresponding to FIG. 1B are listed below, and description of each function is omitted. Here, the numbers in parentheses are the numbers of the corresponding components in FIG. 1B.

Transmitter 31 (51) Receiver 33 (53) Synthesizer 35-1 (55-1 to 55-n) Synthesizer 36-1 (56-1 to 56-n) Communication quality monitor 36 (57) Controller 38 ( 58) Reference crystal oscillator 40 (71) Transmit mixer 41 (61) Interference detector 42 (62) Receive mixer 43 (63) Radio transmitter circuit 46 (66) Radio receiver circuit 48 (68) Wireless base station communicating with device 50
Another embodiment 30B of 30 (eg 30-1) is shown,
The configuration is almost the same as the configuration of the mobile wireless device 50 shown in FIG. 1B,
The difference is that the ID / ROHM / area information collation storage unit 54
(FIG. 1B), and has an ID identification storage unit 34 for identifying and storing the ID numbers of the self and the called party.
1B), without the telephone unit 59
An interface 39 is provided.

Each component corresponding to FIG. 1B in FIG. 1D is listed below, and description of each function is omitted. Here, the numbers in parentheses are the numbers of the corresponding components in FIG. 1B.

Transmitter 31 (51) Receiver 33 (53) Synthesizer 35-1 to 35-n (55-1 to 55-n) Synthesizer 36-1 to 36-n (56-1 to 56-n) Communication quality monitor 37 (57) Control unit 38B (58) Reference crystal oscillator 40 (71) Transmit mixer 41 (61) Interference detector 42 (62) Receive mixer 43 (63) Radio transmitter circuit 46 (66) Radio receiver circuit 48 (68) FIG. 1E shows another embodiment of the radio base station 30, in which a radio base station 30C including a plurality of transceivers performs a number of calls in which the antenna sharing device 96 and the radio base station controller 32 are shared. Transmitter / receivers 90-1 to 90-m, and m communication quality monitoring receivers 93-1 to 93 having both functions of the wireless reception circuit 48 and the communication quality monitoring unit 37 shown in FIG. 1D. -m and a control transceiver 94 dedicated to the control channel for control signals are shown,
It is connected to the telephone network 10 via 20.

The configuration of one of the transceivers 90-1 to 90-m used in FIG. 1E is shown in FIG. 1F, and the ID identification storage unit included in the radio base station controller 32 is shown in FIG. The connection relationship with 34C, the control unit 38C, and the reference crystal oscillator 40C is shown.

The transceiver 90 shown in FIG. 1F has almost the same configuration as the radio base station 30B shown in FIG. 1D, and many transceivers 90 have an ID identification storage unit 34C, a control unit 38C and The reference crystal oscillator 40C is shared.

Since the transceivers 90-1 to 90-m shown in FIG. 1E use such a configuration, the changeover switches 44-1 and 44-2 provide
If a particular one of the synthesizers 35-1 to 35-n and 36-1 to 36-n is selected,
The radio base station 30C shown in FIG. 1E can simultaneously transmit and receive m channels.

Also, if the changeover switches 44-1 and 44-2 of the transceiver 90 are operated, and the synthesizers 35-1 to 35-n and 36-1 to 36-n are chopped at high speed and repeatedly switched, It is possible for one transceiver 90 to simultaneously transmit and receive n channels. Therefore, the radio base station 30C shown in FIG. 1E can simultaneously transmit and receive m × n channels at the maximum.

FIG. 1G shows another embodiment of the mobile wireless device 50.

The difference between the mobile radio 50B of FIG. 1G and the mobile radio 50 shown in FIG. 1B is that, in addition to the radio reception circuit 68 including the reception mixer 63 and the reception unit 53, the reception mixer 73 and the C / N measurement Receivers 52 are provided, and the synthesizers 55-1 to 55-n are provided to both reception mixers 63 and 73 via changeover switches 64-1 and 64-3 controlled by a reception changeover controller 65C and a control unit 58B, respectively.
And the transmission mixer 61 has a transmission switching controller 67
The point is that the outputs of the synthesizers 56-1 to 56-n are applied via the changeover switch 64-2 controlled by C.

The mobile radio device 50B shown in FIG. 1G has a function having a particularly remarkable reception diversity effect. A part of the reception signal received by the antenna unit of the mobile radio device 50 is added to the reception mixer 73. Outputs from the synthesizers 55-1 to 55-n are added as local oscillation frequencies to the reception mixer 73 via the changeover switch 64-3. The changeover switch 64-3 does not need to be switched at a high speed like the other changeover switches 64-1 and 64-2, and a low changeover speed of, for example, about 10 Hz is sufficient. Changeover switch 64-3 is synthesizer 55
When at the position where an output of −1 is obtained, the C / N value (the value of the carrier-to-noise ratio) of the channel CH1 measured by the C / N measurement receiving unit 52 is transmitted to the control unit 58B. Next, when the changeover switch 64-3 is in the position for obtaining the output of the synthesizer 55-2, the channel
Measure the C / N value of CH2. Hereinafter, when the output of the synthesizer 55-n is sequentially turned on, the C / N value of CHn is measured and transmitted to the control unit 58B. The control unit 58B uses these values to control the switching frequency of the reception switching controller 65C and the transmission switching controller 67C, for example, to operate at a speed inversely proportional to the C / N value, respectively.

Next, a system for further increasing the reception diversity effect will be described. Figure 1H shows the mobile radio in this case.
An example of the configuration of 50C is shown.

In FIG. 1H, an input radio wave (input signal) to the mobile radio device 50C is divided into n equal parts at the antenna input part, and arrives at the radio receiving circuits 68-1, 68-2,..., 68-n, respectively. Each wireless receiving circuit 6
8-1 to 68-n receive mixers 63-1, 63-2, ..., 63-n, respectively.
, 53-n are provided, and the reception mixers 63-1 to 63-n have synthesizers 55-1 and 55-n respectively.
Local oscillation frequencies from 2, ..., 55-n are input. Therefore, in the configuration shown in FIG. 1, there is no reception changeover switch 64-1 shown in FIG. 1B or the like, and it is possible to always receive and demodulate the signals of the wireless channels CH1, CH2,..., CHn. A part of the output signals of the receiving units 53-1 to 53-n is sent to the control unit 58C, and the other part is added to the mixing circuit 69, and is added to a normal diversity receiver (in this case, after detection and synthesis). The processing is added in the same manner as in ()) and sent to the telephone unit 59. Also each receiver
Some of the outputs of 53-1 to 53-n
-1 to 57n, and the output is applied to the control unit 58C.

FIG. 1I shows a mobile radio device 50D different from the mobile radio device 50C shown in FIG. 1H, and the difference is that the n transmission mixers 61-1 to 61-n, the transmission unit 51- It comprises wireless transmission circuits 66-1 to 66-n including 1 to 51-n, and each transmission unit 51-1 to 51-n includes:
The signals to be transmitted are connected in common and applied, and the control unit 58D
Output from the synthesizers 56-1 to 56-n, each of which is controlled and generates the designated frequency, by each transmission mixer.
61-1 to 61-n. This mobile radio 50D
As in the case of the mobile radio device 50C (FIG. 1H), a plurality of radio channels can be continuously transmitted without being chopped by the changeover switch 64-2.

By employing the circuit configuration shown in FIGS. 1H and 1I, a large diversity effect can be obtained.

A control signal between the mobile radio device 50 (B, C, D) and the radio base station 30 (B, C), or the gateway exchange 20 is different from a case where a control channel dedicated to a control signal is used and a case where a call (talk) is made. There are cases where the out-of-band signal is used.

In order to transmit this control signal outside the band of the communication (talk) signal, specifically, when the control signal is an analog signal, as shown in FIG.
A low frequency f _D0 outside KHz (for example, about 100 Hz) or a high frequency f _D1 , f _D2 , f _D3 ... F _D8 (for example, eight waves from 3.8 KHz to 4.5 KHz at intervals of 0.1 KHz) is used.

When there are many items to control, that is, control data,
May be further increased wavenumber frequency f _D0 ~f _D8 for control, it is also possible to take the subcarrier format. In this case, for example, or apply frequency modulation to the 1-wave or a plurality of waves of f _D0 ~f _D8, or by or multiplied by amplitude modulation, it is also possible to transmit more control data.

When a digital data signal is used as the control signal, it is also possible to digitally encode the voice signal and transmit the signals in a time-division multiplexed manner, as shown in FIG. 2 (b). FIG. 2 (b) shows an example in which the audio signal is digitized by the digital encoding circuit 91, the data signal and the data signal are multiplex-converted by the multiplex conversion circuit 92, and applied to the modulation circuit of the transmission unit 31.

The mobile radio 50 (B, C, D) and the radio base station 30 (B,
C) and the functions of the gateway exchange 20 will be sequentially described.

(A) Mobile Radio 50 (B, C, D) First, among the functions provided in the mobile radio 50 (B, C, D), the function of the control unit 58 (B, C, D) will be described. Control unit 5
8 (B, C, D) first has the following functions as basic functions.

i) Instruct the wireless transmission circuit 66 of the own mobile wireless device 50 (B, C, D) to emit or stop transmission of radio waves and control the transmission power level.

ii) A radio wave reception instruction or a stop instruction to the radio reception circuit 68 of the mobile radio device 50 (B, C, D).

iii) A dial signal transmission enable / disable instruction and a voice transmission / reception instruction for the telephone unit 59.

iv) Oscillation frequency (channel) designation, oscillation command and stop command for synthesizer groups 55-1 to 55-n and 56-1 to 56-n.

v) A control command to the reception and transmission switching controllers 65C and 67C.

vi) Judgment of the appropriateness of change of one or more used channels based on information from the communication quality monitoring unit 57.

vii) Judgment of the appropriateness of the change of the used channel based on the information from the interference detector 62.

viii) Based on the information from the ID / roam area information collation storage unit 54, confirm the ID of the other party to communicate with and determine the channel to be used.

ix) Transfer of a communication channel to a higher-ranking mobile radio of the service type.

x) Reception (transmission) switching controller 65C, 67C
Determining off duty conditions.

xi) Being higher than the radio base station 30 with respect to control decisions. This means that the initiative for the radio base station 30 can be exercised when the control judgment differs from that of the radio base station 30.

xii) Estimation of the moving direction and moving speed of the own mobile radio device 50 (B, C, D).

Next, by using the functions i) to xii) in combination, the following application functions can be provided.

1) The radio channel used by another mobile radio device or another radio base station operating around the own mobile radio device 50 (B, C, D) is stored in the ID / ROHM area information collation storage unit 54. Remember
Use when making a call or switching communication channels.

2) One application of the functions x) and xi) is to eliminate the number of channels used for communication at the same time, to suppress the call, to cut off the used channel, or to make an early termination recommendation when the call traffic is congested.

3) Using the functions of i), vi) and vii), the own mobile radio 5
Setting of optimal transmission level for 0 (B, C, D).

4) One application of the function of 3) is to determine an optimal signal speed for digital signal transmission.

5) Determine the optimal use channel according to the type of communication (telephone, fax data, etc.).

In addition, the control functions associated with the shift to another zone include: 6) Selection of a new radio base station 30 after switching channels during communication. At this time, the new radio base station 30 is selected in consideration of the moving direction of the own mobile radio device 50 (B, C, D).

7) With respect to the gateway exchange 20, the switch 23 of the communication path is opened / closed via the radio base station 30 and a request for parallel use of the communication (communication) path is made.

In short, the above control function is that a part of the function of the radio network controller 12 of FIG. 9 used in the prior art is accommodated in the mobile radio 50 (B, C, D). It is. This is only possible with the use of VLSI technology, which has been making remarkable progress, and can be described as intelligent mobile radios. However, even if the conventional technology is used to make mobile radios intelligent, there is a limit to their utility, and it is completely effective especially for improving the capability of radio line control and eliminating instantaneous interruption when switching channels during a call. Therefore, it is only when the method according to the present invention is used that both the name and the reality become intelligent.

(B) Radio base station 30 (B, C) The radio base station 30 is set with devices having the following functions.

a) Each radio base station has a dedicated radio transceiver for transmitting and receiving a small number (usually one) of control channels and a number corresponding to the number of communication channels dedicated to the communication channel and assigned to the radio base station. Wireless transceivers are installed. For example, assume the wireless base station 30C in FIG. 1E. The optimum number of communication channels to be assigned to one radio base station 30C is given by the communication traffic of the mobile radios 50 (B, C) existing in the small zone in which it is assigned. If the area of the zone is large and there are many mobile radios in the area, the call traffic will inevitably increase,
At least one control channel and a plurality of communication channels are required, and a plurality of transceivers 90 (FIG. 1F) are naturally required. In the case of a metropolitan city in the NTT car telephone system, there is an example in which two control channels and up to about 60 communication channels are allocated.

However, the size of the zone gradually became smaller, and finally, as shown in the above-mentioned document, Ito “Proposal of Cellular Phone System,” CS-86-88, Communication System Study Group, Communication Society, November 1986, a radius of 25 m In the case of a very small zone, the radio base station serving this area as a service area takes control and communication as 1 as a radio channel installed there in terms of call traffic and system and cost, and covers this. The function of the radio is 1
It may be sent and received. That is, one transceiver is used for both control and communication (see FIG. 1D).
In addition, this dual purpose is to respond to a call from a certain mobile radio as in the conventional system by using a control channel at first, and after specifying a vacant communication channel, change the communication channel itself to the same communication channel. It is not a simple method of executing communication with a mobile radio, but does not disturb a radio frequency to be transmitted / received as described later even during communication using one mobile radio and a communication channel as described later. A mobile radio that desires a new outgoing / incoming call by repeatedly switching between the call channel and the control channel at such a switching speed
The feature of the present invention is that it has an excellent function of accepting outgoing / incoming calls even for 50 (B, C, D) and enabling a call.

As described above, various cases can be considered for the configuration of the radio base station 30 (B, C), but the present invention can be applied to all cases.

However, only one set of transmission / reception units is shown in the radio base station 30 of FIG. 1A, and the rest is omitted.

b) The transceiver dedicated to the communication channel installed in each radio base station 30 (B, C) can receive one of a plurality of radio channels among the radio channels assigned to the radio base station. Needless to say, in a zone where traffic fluctuation is high, the radio base station 30C
It is assumed that one transceiver 90 installed in (FIG. 1E) has a configuration as shown in FIG. 1F. That is, the configuration of the portion that transmits and receives wireless signals is substantially the same as the configuration of the mobile wireless device 50 shown in FIG. 1B. As a result, the call traffic in this zone increases, and the wireless base station 30C in which the number of the transceivers 90 is installed to provide the communication for m channels in general, also increases the communication traffic to m channels or more due to the increase in the call traffic. If necessary, one transceiver 90 constituting the radio base station 30C is controlled by the control unit 38C in the base station.
, 35-n and 36-2, 36-3, 35-2, 35-3,..., 35-2
, 36-n and the changeover switches 44-1 and 44-2 are operated. As a result, transmission and reception of a maximum of m × n channels becomes possible instead of transmission and reception of the conventional m channels. The number of channels that can talk simultaneously increases dramatically.

However, the transmission power of each channel decreases according to the number of switching unless a power amplifier is added to the output of the transmission mixer 61, so it is necessary to pay attention to this point, and the total number of channels given to the system is Will be the upper limit. Alternatively, in the case where interference is given to a channel that is communicating in another zone, the number of channels less than the limit is reached.

The radio base station 30B in FIG. 1D has only one transceiver, and in a system employing a method in which the transceiver is shared by the control channel and the communication channel, one mobile radio 50
(B, C, D) while using the call channel,
As described above, by repeatedly switching the communication channel and the control channel at a switching speed that does not disturb the radio frequency to be transmitted and received as described above, the mobile radio device 50 (B, C, C, Also for D), it is possible to accept outgoing / incoming call operations and to enable communication.

 Hereinafter, description will be further made with reference to FIG. 1F.

The control unit 38C first has the following functions as basic functions.

i) The transmission unit 31 of the transceiver 90 included in its own wireless base station 30C is instructed to emit or stop transmitting radio waves and to control the transmission power level.

ii) A radio wave reception instruction or a stop instruction to the reception unit 33 of the own radio base station 30C.

iii) Notification to the gateway exchange 20 of whether or not dial signal transmission is possible, and whether or not voice transmission / reception is possible.

iv) Oscillation frequency (channel) designation, oscillation command and stop command for synthesizer groups 35-1 to 35-n and 36-1 to 36-n.

v) Control commands to the reception and transmission switching controllers 45 and 47.

vi) Judgment of the appropriateness of the change of the used channel based on the information from the communication quality monitoring receivers 93-1 to 93-m, and whether or not the quality information can be transmitted to the opposing mobile radio 50 (B, C, D) Judgment.

vii) Judgment of the appropriateness of the change of the used channel based on the information from the interference detector 42.

viii) Based on the information from the ID identification storage unit 34C, confirm the other party ID to communicate with and determine the channel to be used.

ix) Based on a request from a higher-level mobile wireless device of the service type, early termination of communication with the mobile wireless device 50 (B, C, D) currently in a call is attempted. Alternatively, immediate termination is performed.

x) ON / OFF for the reception and transmission switching controllers 45 and 47
Determining off duty conditions.

xi) Be lower than mobile radio 50 (B, C, D) with respect to control decisions. This is related to control decisions,
When it is different from 50 (B, C, D), the mobile radio 50 (B, C, D)
Transfer of initiative to However, xi) is set for convenience of explanation, and in an actual system, even if the wireless base station 30 is given the initiative, it can be implemented without any problem.

xii) As already described in a) and b), in the case of a radio that also serves as a communication channel and a control channel, as in the case of the mobile radio 50 (B, C) described in (A), FIG. As shown, it has a plurality of synthesizers 35-1 to 35-n and 36-1 to 36-n, and repeatedly switches between a speech channel and a control channel at a switching speed that does not disturb the radio frequency to be transmitted and received. The mobile radio 50 that wants to make a new call
(B, C, D) must have a function to accept incoming and outgoing call operations and to enable communication.

Next, the following application functions are provided by using the functions i) to xii) in combination.

1) The radio channels used by other radio base stations in operation around the radio base station 30 (B, C) and the radio channels used by other mobile radio devices are stored in the ID identification storage unit 34C, and the call is made. Use when switching channels during communication.

2) One application of the functions of x) and xi) is to suppress calls, cut off channels in use, or make recommendations for early termination when call traffic is congested.

3) Using the functions of i), vi) and vii), the own radio base station 3
Setting of optimal transmission level at 0.

4) One application of the function of 3) is to determine an optimal signal speed for digital signal transmission.

5) Determine the optimal use channel according to the type of communication (telephone, fax data, etc.).

In addition, the control functions associated with shifting to another zone include: 6) Mobile radios 50 (B, C, D) desiring to switch channels during communication.
Communication of reception quality data based on the signal from and the start of communication when selected as a new radio base station 30 (B, C).

7) For the gateway exchange 20, the mobile radio 50 (B, C, D)
Opening and closing of the switch group 23 of the communication path and execution of the parallel use request of the communication path based on the request from

8) After performing the channel switching during a call, the ID and the call channel number of the mobile radio device 50 (B, C, D) with which communication has been performed are stored for a certain period of time.

9) Based on the report from each radio base station 30 (B, C) that has received the location registration signal (using the control channel) from the mobile radio 50 (B, C, D), the mobile radio 50 (B, C, D) C, D) ID
The (self-identification information) is stored in the ID identification storage unit 24 via the communication path control unit 21 included in the gateway exchange 20. In this case, in the present invention, since the location registration request is made from the plurality of radio base stations 30 (B, C), the quality (S / N, C / N) of the signal received by the mobile radio 50 (B, C, D) , Etc.).

10) Based on the report from each radio base station 30 (B, C) that has received the call signal (using the control channel) from the own mobile radio device 50 (B, C, D), the received signal quality The best radio base station or the next best radio base station 30 (B, C) or mobile radio 50
By detecting the moving direction and speed of (B, C, D), the radio base station 30 (B, C) in the new zone in anticipation of the destination zone is selected. The communication channel number which is not used at that time to be used for communication with the mobile radio device 50 (B, C, D) is designated from the allocated radio channels. A command signal for stopping communication with the mobile radio device 50 (B, C, D) is transmitted to the radio base station whose communication quality has deteriorated.

If the above control function is expressed in a word, a part of the function of the radio network controller 12 shown in FIG. 9 used in the prior art is replaced with the radio base station 30 (B, C) and the mobile radio 50 ( B, C)
As a result, all functions of the radio network controller 12 can be accommodated, and the radio network controller 12 can be eliminated.

However, even if the wireless base station 30 is made intelligent using the conventional technology, there is a limit in its utility, especially for improving the capability of wireless line control and eliminating instantaneous interruption when switching channels during a call. It is ineffective, and only with the method according to the invention is it intelligent to be intelligent.

(C) Gateway Exchange 20 The gateway exchange 20 having the configuration shown in FIG. 1A is a mobile exchange 50 (B, B) in the mobile communication system according to the present invention.
C) to store the position information (function of the ID identification storage unit 24),
The communication path is set between the mobile radios 50 (B, C), the switch group 23 is opened and closed under the control of the communication path controller 21, and the mobile radios 50 (B, C) in the mobile communication system are executed.
C) and sets a communication path for an outgoing / incoming call between the telephone network 10 outside the system, and is in charge of opening and closing the switch group 23 under the control of the communication path control unit 21.

 Hereinafter, functions of the gateway exchange 20 will be described in detail.

a) Execution of the operation of the switch group 23 to be opened / closed in connection with the call from the mobile radio device 50 (B, C, D), and if the called party is included in the telephone network 10, Transmission of information necessary for setting up a call with the called party addressed to the exchange 20.

b) When an incoming call signal to the mobile radio device 50 (B, C, D) is transmitted from the caller included in the telephone network 10 via the self-exchange switch 20, the call path control unit 21 is The operation of the switch group 23 to be opened / closed via the switch, and the current position confirmation of the called mobile radio device 50 (B, C, D) by searching the ID identification storage unit 24.

c) In connection with the incoming call to the mobile radio device 50 (B, C, D), the radio base station 30 (which covers the zone where the current position of the called mobile radio device 50 (B, C, D) is registered) B, C) to send a call signal. First, the calling signal is transmitted to all the radio base stations 30 (B, B, C) for which the current location of the mobile radio device 50 (B, C, D) is registered.
C), and upon receiving this, each radio base station 30 (B, C) transmits an incoming call signal addressed to the mobile radio device 50 (B, C, D) at the same time using a downlink control channel. However, the transmission time does not necessarily have to be the same time, and each radio base station 30
The data may be sequentially transmitted in time series for each (B, C). That is, it is only necessary to take measures to avoid interference due to the time difference between signals.

d) After the self-mobile radio 50 (B, C, D) starts a call, if communication traffic conditions in the system are allowed, a decision to implement transmission / reception diversity and an instruction to perform an operation.

e) Mobile radio 50 (B,
Regarding C, D), when traffic congestion or calling of important subscribers or broadband signal service applicants appear at that time, the multiplicity of transmission / reception diversity (number of channels used) decreases or diversity stops. Judgment and execution.

f) According to a) to e), the own mobile radio 50 (B,
C, D), if the communication quality with the radio base station 30 (B, C) deteriorates within the same zone due to the movement of the location or when the zone is shifted and the channel is changed (talk) Judgment of execution of operation of medium channel switching. In order to perform this operation, it is necessary to send a control signal to the opposite radio base station 30 (B, C).
As shown in FIG. 2 (a), the communication is performed using a speech channel and using the upper or lower frequency band of the frequency band of the speech signal.

g) When the mobile radio 50 (B, C, D) moves,
By causing the mobile radio device 50 (B, C, D) to report the measurement result of the reception quality change of each of the radio base stations 30 (B, C) communicating with each other, the mobile radio device 50 (B, C, D) D) to estimate the direction and speed of movement, while the mobile radios (B, C,
D) comprehensively determine the traffic state (use state of the communication channel) in the radio base station 30 (B, C) in the moving direction of
If necessary, it is determined whether the degree of multiplexing of the transmission / reception diversity of the mobile radios 50 (B, C, D) communicating with these radio base stations 30 (B, C) is reduced or increased.

Next, the operation of the entire system will be described in the following order.

(1) Location registration (2) Outgoing call operation (3) Incoming call operation (4) Application of diversity when traffic is low (5) Explanation and theoretical basis of channel switching during call and diversity effect.

(6) A communication channel assignment method for estimating the moving direction and moving speed of a mobile radio device and taking measures against traffic congestion.

(1) Location registration In the home area where the mobile radios 50 (B, C, D) are permanently located, or in the roam area where service is provided outside the home area, the gateway exchange 20 has already been registered.
When the power switch of the mobile radio device 50 (B, C, D) is turned on and the operation is started while the surrounding radio base stations 30-1 to 30-n are operating, the operation is performed first. Is a location registration operation. 4A and 4B show the flow of the location registration operation.
This is shown and described.

When the power switch of the mobile radio device 50 (B, C, D) is turned on, a signal for starting an operation for registering the current position is transmitted to a nearby radio base station using the uplink control channel (CH). 30-1 to 30-n (S201, 4A
Figure).

Upon receiving the operation start signal from the mobile radio device 50 (B, C, D) (S202), the radio base station 30 transmits the mobile radio device 50 (B, C, D).
Confirm the operation start of D) (S203), and if confirmed (S203YE
S) If the downlink control channel is in the off state, it is turned on, and the location registration signal transmission permission is transmitted using the downlink control channel (S204).

Upon receiving the location registration signal transmission permission (S205), the mobile wireless device 50 (B, C, D) transmits a location registration signal with its own ID (identification number) using an uplink control channel ( S206). Communication using this control channel is performed without a transmission / reception unit dedicated to the control channel. For example, even in the radio base station 30B shown in FIG. 1D, the radio transmission / reception circuits 46 and 48 have already communicated with other mobile radio devices. Therefore, even when used in a plurality of channels, a plurality of channels can be chopped at a high speed and simultaneously transmitted and received.

Upon receiving the location registration signal (S207), the wireless base station 30
In (B, C), the reception quality is checked, and the ID
Is stored (S208). If the reception quality is not less than a certain value as a result of the inspection (S209 YES, FIG. 4B), a location registration request signal is transmitted to the gateway exchange 20 (S210). Upon receiving this registration request signal (S211), the gateway exchange 20 registers that the reception quality and the location are stored in the plurality of radio base stations 30-1 to 30-n (S212). When this registration work is completed, a registration completion signal is sent (S213). The wireless base station 30 (B, C) that has received the registration completion signal transfers the signal to the mobile wireless device 50 (B, C, D) using the downlink control channel.

The mobile radio 50 (B, C,
D) Each radio base station 30 registered by inspecting the received content
The ID (identification number) of (B, C) is stored in the ID roam area information collation storage unit 54 (S216).

With the above operation, the position registration operation ends, and the system enters a standby state for an incoming call.

As is clear from the above description, the location registration of the mobile radio device 50 (B, C, D) of the mobile communication system according to the present invention differs from the conventional system in that it is registered at a plurality of locations (in units of radio base stations). It will be. This represents one feature of the present invention. When storing the location registration information, the radio base station 30 (B, C) and the gateway exchange 20 measure the quality of the location registration signal transmitted from the mobile radio 50 (B, C, D). And stores it including the value. Therefore, for example, in the gateway exchange 20, the mobile radios 30 (B, C,
In storing the position registration signal of D), the position registration signal is stored together with the ID of the radio base station 30 (B, C) having the higher reception quality, for example, in the order of the reception quality as shown below.

Similarly, each wireless base station stores not only information received by its own wireless base station 30 (B, C) but also received information of peripheral wireless base stations as shown in Table 1. This is a mobile radio 50
(B, C, D) when the communication path is set
Not only is it useful information when switching channels during a call (communication) accompanying the movement of 0 (B, C, D), but also the moving direction and speed of the mobile radio 50 (B, C, D). It is necessary to make an estimate.

For the same reason as above, mobile radio 50 (B, C, D)
The ID roam / area information collating and storing section 54 stores the same information as in Table 1.

Next, it is assumed that the mobile radio device 50 (B, C, D) moves from the zone in which the location has been registered during standby (when no call is made) and shifts to an adjacent zone. For example, in a system in which a control signal is constantly transmitted from the wireless base station 30 (B, C), the ID of the wireless base station 30 (B, C) included in the received control signal is automatically recognized. It can be determined by collating with the ID stored in the mobile wireless device 50 (B, C, D).

In a system in which a control signal is not always transmitted from the wireless base station 30 (B, C, D), the mobile wireless device 50 (B, C, D) transmits the signal from the surrounding wireless base station 30 (B, C, D) at predetermined time intervals. C), a downlink control signal transmission request is made using the uplink control channel, and the ID of the radio base station 30 (B, C) transmitted from each radio base station 30 (B, C) is moved accordingly. This is possible by collating with the ID information stored in the wireless device 50 (B, C, D).

In any of the above systems, of the ID information of the radio base station 30 (B, C) obtained as a result, the base station ID information previously stored in the own mobile radio device 50 (B, C, D) If it is found that there is at least one new base station ID information different from the new base station ID, the own mobile radio device 50 (B, C, D) determines that it has shifted to the new zone and the control unit 58 (B, C) (1st B
(Refer to the figure.) Executes the update of the position registration in the ID roam area information collation storage unit 54. That is, the ID information of the own mobile radio device 50 (B, C, D) is transmitted to the surrounding radio base station 30 (B, C) using the uplink control channel.

The plurality of radio base stations 30 (B,
In C), the same procedure as described above is performed, and a location registration signal of the mobile radio 50 (B, C, D) is transmitted to the gateway exchange 20. Upon receiving this signal, the gateway exchange 20 activates the ID identification storage unit 24 in its own device and operates the mobile radio 50 (B, C,
As the location registration information of D), the existing information is replaced with new information. Thereby, the mobile radio 50 (B, C, D)
Is updated.

The above update work is necessary because the mobile radios 50 (B, C, D) are in standby mode. If the mobile radio 50 (B, C, D) moves to a new zone during communication (talk), as described later, the gateway exchange 20 , When a new call channel is allocated between the new radio base station (B, C) and the mobile radio 50 (B, C, D), the location registration is updated at the same time, so no special action is required It is.

Note that in a system in which the number of radios installed in the radio base station 30 (B, C) is small and the radio for the control channel is diverted to the communication channel, the radio base station 30 (B, C) is not used. When communicating with the mobile radio device 50 (B, C, D) of the other mobile radio device, there is no other radio device on standby using the prior art, so even if a location registration request is issued from another mobile radio device. Even so, the call was invalid. However, as a configuration of a mobile radio,
For example, as shown in FIG.
55-n, 56-1 to 56-n and changeover switches 64-1 and 64-2, etc., are already communicating with other mobile radios by a method of repeatedly switching while chopping transmission / reception channels. However, it is possible to communicate with a newly called mobile wireless device using a control channel. Therefore, location registration can be accepted. (2) Calling operation The calling operation from the mobile radio device 50 (B, C, D) will be described.

The mobile radio 50 (B, C, D) has the limit turned on,
It is assumed that the location registration described in (1) has been completed. The calling operation when the mobile radio 50 (B, C, D) calls another mobile radio in the same system or a telephone accommodated in the telephone network 10 shown in FIG. A dial operation is performed in the same manner as a call from a used mobile phone.

Now, the user performs the operation of raising (hanging off) the handset of the telephone unit 59 of the mobile wireless device 50 shown in FIG. 1B. In this state, the outgoing call signal transmitted from the mobile radio 50 is transmitted to the uplink control channel (mobile radio 50
The control unit 58 of the own mobile radio device 50 knows whether or not to transmit to the radio base station 30 (B, C)). That is, at the time of a call waiting state before the calling state, a plurality of radio base stations 30 (B, C)
Downlink control channel (wireless base station 30
This is because the mobile radio device 50 captures the mobile radio device 50) from (B, C), and recognizes the timing at which the control signal contained therein can be called.

In the mobile radio 50, all the functions shown in FIG. 1B are active. In particular, synthesizers 55-1,55-2,…, 55-n
Is prepared for local oscillation frequency oscillation, but the changeover switch 64-1 maintains a state in which the synthesizer 55-1 is fixed at a position to be selected. The control unit 58 sends a control signal to the synthesizer 55-1 to oscillate a local oscillation frequency for receiving a downlink control channel. On the other hand, in the radio base stations 30-1, 30-2, ..., 30-n around the mobile radio 50,
If there is only one wireless device in the wireless base station, the next operation is to receive an uplink control signal from the mobile wireless device 50 depending on whether or not communication is being performed with another mobile wireless device.

First, the radio base station 30 (B, C) that is communicating with another mobile radio at that time, includes the reception and transmission switching controllers 65C, 67C in the radio base station 30 (B, C) and the synthesizer. Five
5-1,55-2,56-1,56-2 are in operation, of which 55-1,56-
1 outputs a local oscillation frequency necessary for communication with another mobile radio, and synthesizers 55-2 and 56-2 output a local oscillation frequency which requires communication on a control channel. Therefore, the mobile phone 50 in the vicinity of the own radio base station 30 (B, C) maintains a state where it can immediately respond to a call.

Next, at that time there was no communication with other mobile radios,
In the radio base station 30 (B, C) waiting on the control channel, the reception state of the radio reception circuit 68 is fixed so that the control channel can be received. Therefore the wireless transmission circuit
66 and the like are inactive, and only the wireless receiving circuit 68 and the synthesizer 55-1 are operating.

Now, a call request signal is transmitted from the mobile radio device 50 under the above conditions. The call request signal including the ID of the own mobile radio device 50 is created by the control unit 58 shown in FIG. 1B and sent to the radio transmission circuit 66. The radio transmission circuit 66 modulates the signal, amplifies the signal to an appropriate level, applies the signal from the transmission mixer 61 to the antenna, and sends the signal to the radio base station 30-1 and the like.

In the radio base station 30-1 or the like that has received this signal satisfactorily, the content of the received signal is inspected and the ID of its own radio base station 30-1 is checked.
It confirms that the call is from the mobile radio device 50 whose location registration has been stored in the identification storage unit 34, and
In addition to the value of the reception quality received in 30-1 and the empty channel number, the mobile station returns a call to the mobile radio device 50 that has made the call, requesting the mobile radio device 50 to determine the communication channel number to be used. If the mobile radio is not stored in the storage unit 34 of the own radio base station 30-1, the mobile radio is stored at this time and the added information is returned to the mobile radio 50. However, in this case, it is assumed that the timing of the reply is related to the reception quality as described above so as not to interfere with the reply from another radio base station.

On the other hand, the mobile radio device 50 which has received the response signals from the radio base stations 30-1, 30-2,..., 30-n around the radio base station 30 Determine the number of stations. That is, the contents of the response signals from the radio base stations 30-1, 30-2,..., 30-n are inspected, and the communication direction of the self-mobile radio 50 And speed, own mobile radio 50
The multiplicity of diversity transmission / reception provided for
Suppose that it is decided to communicate with the radio base stations 30-1, 30-2, and 30-n based on an idle communication channel that does not cause radio interference and the traffic state in the vicinity. In this case, the own mobile radio device 50 uses the uplink control channel,
The communication channel numbers to be used are notified to 30-1, 30-2, and 30-n, respectively, and a request is made to wait on the channel of the same number.

The radio base stations 30-1 and the like report, at the timing indicated by the control signal, that the radio base stations 30-1 to 30-n are on standby in the indicated communication channels.

Mobile radio from multiple radio base stations 30-1 to 30-n described above
Reports (sending) to 50 can be sent at the same time.
However, in this case, it is necessary to make the occupied frequency bands different from each other outside the band, and to make the mobile radio device 50 identify which radio base station 30 has transmitted.

The flow of the calling operation is described above with reference to FIGS. 5A and 5B. However, the radio base station 30 that communicates with the mobile radio 50
Shows only one station (30-1). The gateway exchange 20 and the radio base station 30-1 have already started operation, the mobile radio device 50 has also started operation, and the location registration work described in FIGS. 4A and 4B has been completed. The handset is raised (off-hook), and the off-hook signal and the ID (identification number) of the mobile radio device 50 are transmitted using the uplink control channel (CH) (S231, FIG. 5A).

In response to this, the radio base station 30-1 transmits the ID of the mobile radio 50.
Is detected, and it is confirmed that the ID is already stored in the ID identification storage unit 34 (S232).

Therefore, the radio base station 30-1 adds the value of the reception quality received from the mobile radio device 50 and the current idle channel number and sends the call response signal using the downlink control channel (S2
33).

The mobile radio device 50 that has received such a call response signal from the plurality of radio base stations 30 examines the value of the reception quality from each radio base station 30, and can perform diversity transmission and reception, for example, the radio base stations 30-1 to Select 30-n and confirm the empty channel (S23
4) A signal for designating a communication channel to be used is transmitted (S235). Here, the channel is used for the radio base station 30-1.
Send CH1. The radio base station 30-1 confirms that the communication channel designated by the mobile radio device 50 is vacant, switches to that channel (S236), and sends a channel switching completion report using the downlink control channel. (S237).
Upon receiving the switching completion report (S238), the mobile radio device 50 has a dial tone on the specified communication channel (S239).

On the other hand, the wireless base station 30-1 sends a call signal to the gateway exchange 20 (S240). The gateway exchange 20 that received this
Stores the ID of the mobile radio 50 and the communication quality in the ID identification storage unit 24, and controls the switch group 23 under the control of the communication path control unit 21.
For example, the switch SW1-1 is turned on to connect the wireless base station 30-1 to the exchange 11 of the telephone network 10 (S241).

Therefore, from the exchange 11 side, the switch group of the gateway exchange 20
Dial tone is sent out via 23 (S242, 5B
Figure).

This dial tone is transmitted from the radio base station 30-1 to the channel CH.
It is transferred by 1 (down) (S243), received by the mobile radio device 50, and it is confirmed that a call (communication) is set (S2).
44). The mobile radio 50 transmits the destination dial signal to the channel.
Transmission is performed using CH1 (up) (S245), and the exchange 11 operates to set a communication (communication) path to the destination of the telephone network 10 (S247). Thereafter, a call is made (S248).

When the call is completed, the handset is hooked on (S249), and the on-hook signal and the end signal are transmitted to the mobile radio 50.
Is transmitted using the channel CH1 (up) (S25).
0). Thereby, the wireless base station 30-1 confirms the end of the call (S25
1), tell the end switch to the gateway exchange 20. So the gateway exchange 2
At 0, the switch SW1-1 of the switch group 23 is turned off, and the call ends (S252).

(3) Incoming Call Operation The present invention has been described above with respect to the outgoing call from the mobile radio device 50. Hereinafter, the flow of the incoming call operation to the mobile radio device 50 will be described in the 6A.
This will be described with reference to FIG. 6 and FIG. 6B. Here, among many wireless base stations 30, 30-1 is shown as a representative. For example, the mobile radio 50 and the like existing near the radio base station 30-1 and the like are waiting on a control channel commonly used by all the radio base stations 30.

In FIG. 1A, it is assumed that an incoming call signal addressed to the mobile radio device 50 arrives at the gateway exchange 20 from the telephone network 10. Inside the gateway exchange 20
It is assumed that the ID identification storage unit 24 examines the incoming call signal and checks the ID of the called party, and finds the wireless base station 30 (plurality) whose location is currently registered. Then, the communication control unit 21
The mobile radio device 50 simultaneously transmits an incoming call signal to all the radio base stations 30 whose location is registered via
6A).

Each radio base station 30 receiving this signal transmits the ID in its own station.
When the identification storage unit 34 (C) is searched to confirm that the ID of the mobile radio device 50 is stored therein, a signal for an incoming call and a call channel designation request is sent to the mobile radio device 50 using the downlink control channel. Is transmitted with the ID of the wireless base station 30-1 added.
The mobile radio 50 is called at substantially the same time by a similar operation to the other radio base stations 30 (S272).

On the other hand, the incoming call signal is received by the mobile radio device 50 waiting on the control channel, the quality of the received signal and the content of the signal are searched, and it is confirmed that the incoming call signal is the incoming call signal addressed to the own mobile radio device 50. After that (S273), the own mobile radio device 50 takes into account the nearby call traffic state and takes into account the radio base stations 30-1, 30-2,.
.. 30-n using the uplink control channel (S274). At the same time, the mobile radio 50 (Fig. 1B)
Synthesizers 55-1,55-2 and 56-1,56-2,…, 56-n
And changeover switches 64-1 and 64-2 and reception and transmission changeover controller 6
5C and 67C are operated, for example, the communication channel CH1 (for the radio base station 30-1) and the communication channel CH2 (for the radio base station 30-2).
,...,..., In which transmission / reception is possible on the communication channel n (for the radio base station 30-n). Each of the radio base stations 30-1 to 30-n that have received the uplink control channel from the own mobile radio device 50 inspects the quality of the received signal,
The ID is confirmed (S275), and an incoming call response signal is transmitted to the gateway exchange 20 (S276).

The call response signal to the gateway exchange 20 includes a signal to the switch group 23 for setting a communication path. Therefore, upon receiving this incoming response signal, the gateway exchange 20 checks whether or not the ID of the mobile radio 50 has already been stored in the ID identification storage unit 24. The data is registered in the ID identification storage unit 24 together with the quality inspection data of 30-1 (S277), and a response confirmation signal including the stored ID and the like is transmitted to the radio base station 30-1 and the like (S278).

Upon receiving this response confirmation signal, the wireless base station 30-1 confirms that the ID of the mobile wireless device 50 has been correctly registered (S27
9), check whether the channel specified by the mobile radio device 50 is vacant or not, and examine whether switching is possible (S280, 6B
FIG.), And transmits the result of the switching approval / disapproval signal to the mobile radio device 50 through the downlink control channel (S281).

The mobile wireless device that has received the switching approval / disapproval signal (S282)
In 50, if there is no available channel and switching of the specified channel is not permitted (S283NO),
Returning to S274, another call channel is designated (S274).
If the specified channel is a free channel and switching is recognized (S283YES), the channel is switched to and a channel switching completion report is transmitted using the uplink control channel (S284).

Confirmed that the channel was switched to an empty channel (S285)
The radio base station 30-1 switches to this channel and sends a channel switching completion signal to the gateway exchange 20 (S28).
6).

Upon receiving the channel switching completion signal, the gateway exchange 20 operates the communication path control unit 21 to set the communication path to the telephone network 10 via the exchange 11 and turns on, for example, SW1-1 of the switch group 23. Then, the wireless base station 30-1 and the telephone network 10 are connected (S287). Then, a call signal is transmitted from the telephone network 10 via the gateway exchange 20 (S288, FIG. 6C), and this is confirmed by the radio base station 30-1 (S289). Therefore, a ringing bell signal is transmitted on the set communication channel CH1, and a ringing tone is generated by the mobile radio device 50 (S291).

When the handset of the mobile radio device 50 is picked up by the ringing tone (off-hook) (S292), an off-hook signal is sent out on the channel CH1 and transferred by the radio base station 30-1 (S293). The call is received by the gateway exchange 20 (S294), and a call is started between the telephone network 10 and the mobile radio device 50 (S29).
Five).

When the call ends, the handset is taken down, and the on-hook signal and the end signal are transmitted by the channel CH1 to the radio base station 30-1.
(S296), and the wireless base station 30-1 confirming the end of the call transfers this signal (S297). The gateway exchange 20, which has received the on-hook signal and the call termination signal, activates the communication path control unit 21, turns off the switch 1-1 of the switch group 23, and ends the call (S298).

In the above description, even in a system in which a control transceiver installed in the radio base station 30-1 is diverted for a communication channel, a method for temporally and repeatedly switching transmission and reception channels as described in the configuration of the mobile radio. By the third already
It is possible to communicate with a newly-arrived mobile radio using the control channel even while communicating with the mobile radio (see FIG. 1D).

In the systems exemplified in (2) outgoing call operation and (3) incoming call operation described above, a dedicated radio channel for control and a dedicated radio channel for speech are clearly separated as radio channels. Was. However, in some real systems, this distinction is not clear. In such a system, it is possible to perform an equivalent operation by regarding a specific communication channel as the control channel described above.

(4) Application of Diversity When Traffic Is Closed By the call origination / reception operation described in the paragraphs (2) and (3), the general telephone A in the telephone network 10 and the mobile radio 50 (or system) Between two mobile radios in
It is assumed that communication has started. In this case, it is assumed that the number of the radio base stations 30 with which the mobile transceiver 50 communicates is one, and the communication traffic state in the system, at least the traffic state in the vicinity of the mobile transceiver 50, is not busy hour, that is, the busiest time ( The same can be applied to the case where the number of wireless base stations 30 is two or more.)

Then, the mobile radio device 50 starts preparations for performing diversity transmission and reception. Therefore, the mobile radio 50 shown in FIG.
The control unit 58 sends an operation start command signal to each of the transmission switching controller 67C and the reception switching controller 65C, and also outputs the synthesizers 55-1 and 56-1 in addition to the currently operating synthesizers 55-1 and 56-1. Control channel CH for n and 56-n
Request frequency oscillation so that 50 can transmit and receive. At the same time, the control unit 58 starts transmitting a control signal to the wireless transmission circuit 66. This control signal includes the ID of the mobile wireless device 50, the type of communication (type of voice, data, etc.), the channel number currently in use, and transmits to the nearby wireless base station 30 that has received the signal and is not currently communicating. On the other hand, it requests the start of diversity transmission / reception operation. However, the conditions for the above radio base station 30 are as follows if the radio base station 30 is in the state shown in FIG. 1D or FIG.
If the configuration shown in Figure 1F is made,
This condition can be alleviated because a new call can be made with the mobile wireless device even during communication with the third party mobile wireless device.

With the above operation, the output of the transmission mixer 61 of the mobile radio device 50 can be transmitted by the control channel CH50 in addition to the currently communicating channel CH1, while the receiving mixer 63 is currently transmitting the communication channel CH1. , The control channel can also be received. This is described in detail in the operation (5) of the channel switching during communication.

The control signal transmitted from the mobile wireless device 50 is received by a plurality of nearest wireless base stations 30-2, 30-3, ..., 30-n that are not currently communicating. Then, one of them, the radio base station 30-2
As a result, the quality of the received signal and the content of the signal are examined, and as a result, the quality of the signal received from the mobile wireless device 50 is equal to or higher than a certain value, and the communication quality does not immediately decrease. If it is determined that there is not any, the control signal including the ID of the own radio base station 30-2, the usable radio channel number (for example, CH2), etc., is transmitted to the mobile radio device 50 that has transmitted. Then, it reports that diversity transmission / reception is possible.

This signal is received by the wireless receiving circuit 68 of the mobile wireless device 50 and transmitted to the control unit 58. The control unit 58 receiving this, as a result of examining the signal transmitted from the wireless base station 30-2, determines that it is appropriate to perform diversity transmission and reception, and for the synthesizers 55-2 and 56-2, Channel CH
In order to start communication with the radio base station 30-2 in 2, a request for generation of a local oscillation frequency is required. Also, the radio base station 30-2 operates the switch group 23 for the communication path control unit 21 in the gateway exchange 20 to transmit the communication signal currently being communicated to the radio base station 30-2.
Also requires that they be sent in parallel.

Upon receiving this request, the gateway exchange 20 transmits the signal to the radio base station 30-2.
In response to the request, the transmission of a voice signal, that is, a voice signal from a general telephone, is started not only to the radio base station 30-1 but also to the radio base station 30-2 by the same signal.

The radio base station 30-2 that has received this audio signal adds the ID of the radio base station 30-2 to the mobile radio 50 and adds the radio channel.
Transmit on CH2. On the other hand, the mobile radio 50
Since the reception of H2 is enabled, the output of the wireless reception circuit 68 that has received this signal is inspected by the communication quality monitoring unit 57, and if the quality is good, the voice signal is sent to the telephone unit 59.
The control signal is transmitted to control section 58.

By performing the above operation, the mobile radio device 50 enters a diversity transmission / reception state with the radio base stations 30-1 and 30-2.

The diversity transmission / reception execution request signal transmitted from the mobile radio device 50 to the radio base station 30 in the vicinity thereof is transmitted to the radio stations 30-3, 30-4, ..., 30 other than the radio base station 30-2. -
n is also received in the same manner, and among these, the radio base station suitable for the condition should have transmitted the same response signal as in 30-1 to the mobile radio device 50.

Therefore, the control unit 58 of the mobile radio 50 or the gateway exchange
At 20, in the case where it is desired to perform diversity transmission / reception with a greater number of wireless base stations, the above-described wireless base station 30-2
When exactly the same operation is performed as when diversity transmission / reception is performed between all devices, and when all operations work properly, diversity transmission / reception with, for example, the radio base station 30-3 is started.

Hereinafter, by the same operation as described above, the radio base station 30-3, 3 which is closest to the mobile radio 50 and is not currently communicating, and whose communication quality satisfies a certain criterion or more required for the system.
Diversity transmission / reception is similarly started for 0-4,..., 30-n. The multiplicity of diversity is the number of radio base stations 30 with which communication is possible or the multiplicity of simultaneous transmission and reception provided in the mobile radio device 50, that is, 1B
In the case of the figure, it depends on the number n of the synthesizers 55-1 to 55-n or 56-1 to 56-n.

Also, in the above description, it is assumed that the call traffic in the system is not crowded, but the traffic state is measured by each radio base station 30 or the own mobile radio device 50, and when the traffic is sequentially congested, With regard to the multiplicity of diversity, restrictions are sequentially added, and at the peak, the state shifts to a multiplicity of 1, that is, a state without diversity. However, by providing discrimination in the reduction of multiplicity according to the type of communication being performed (speech, data, facsimile, etc.), systematic processing becomes possible, such as making broadband communication less subject to multiplicity restrictions.
The present invention has such features that good communication can be ensured regardless of the type of communication.

(5) Description and Rationale of Channel Switching During Call and Diversity Effect n-1 radio base stations 30 and one mobile radio 50
During communication using the n-1 channels, if the communication quality of a certain channel in the communication channel falls below a certain value, the other communication that satisfies the certain communication quality is not currently performed. Prior to switching to another one channel (new channel) for communication with one of the wireless base stations 30, the switching receiving means and the switching transmitting means are switched at a speed which does not affect the communication signal. The old channel and the new channel other than the n-2 channels being continuously transmitted and received are transmitted and received temporarily in parallel, and during that time, the quality of the new channel is checked to confirm that the quality is above a certain level. Then, the operation for channel switching ends, and communication is performed using n-1 wireless channels including the new channel.
As a result, instantaneous interruption of communication due to channel switching does not occur. In addition, a transmission / reception diversity effect can be obtained including the case where channel switching is not performed.

1A to 1I show a system configuration for explaining an example of this operation. Hereinafter, description will be made with reference to these figures.

The mobile radio 50 (B, C, D) (hereinafter simply abbreviated as 50)
, 55- (n-1), a radio receiving circuit 68, and a radio transmitting circuit 66, the radio base stations 30-1, 30-2,.
..., 30- (n-1) and the communication channels CH1, CH2, ..., CH (n-
Assume that communication is being performed using 1). It is assumed that the mobile radio device 50 moves away from the radio base station 30-1 and approaches the radio base station 30-n. Then, as the relative distance between the mobile radio 50 and the radio base station 30-1 increases, the communication quality starts to deteriorate, and the communication quality monitoring unit 56 of the mobile radio 50 detects this (level L _1). It is detected that it has dropped below). Incidentally, it is set to exceed a value even the level L ₁ line is required.

The mobile radio device 50 requests all nearby radio base stations 30 to measure the quality of the transmission signal of the mobile radio device 50. In response to this request, each radio base station 30 that is not currently communicating with the mobile radio device 50 reports the measured value to the mobile radio device 50.

In this case, the signal transmitted from the transmitting antenna of the mobile radio device 50 is transmitted to the radio base stations 30-1, 30-2, ..., 30- (n-
1) While continuously transmitting a call signal addressed to, the uplink (from the mobile radio 50 to the radio base station 30) control channel (CH
.., 30- (n-1), if the reception state is good for a radio base station (for example, 30-n), the downlink (radio base station 30 To the mobile radio 50) to respond using the control channel (CH50).

The content of the control signal transmitted from the mobile radio device 50 includes the following signals.

i) ID of own mobile radio device 50.

ii) The other party's base transceiver station 30-1, 30-2, ..., 30-
(N-1) ID and reception quality.

iii) Channel number currently in use.

iv) Type of communication (telephone, fax, data, etc.).

v) Service type.

A control signal including such contents is received by a plurality of wireless base stations 30 in the vicinity.

That is, these radio base stations 30 are waiting for reception on a control channel (for example, CH50) defined by each system during standby mode, except when communicating with another mobile radio device. Received at base station 30. At the same time, the communication quality monitoring unit installed in each wireless base station 30 that has received the signal
The communication quality is inspected at 36, and if the quality is equal to or higher than a certain quality, the ID of the mobile radio device 50 of the other party is stored in the ID identification storage unit 34 in the radio base station 30 and notified to the control unit 38. The contents of this notification include the following.

a) ID of the mobile radio device 50 that has transmitted.

b) The other wireless base station with which the mobile wireless device 50 is currently communicating
IDs of 30-1, 30-2, ..., 30- (n-1).

c) Channel number used.

d) Type of communication.

e) Reception conditions (S / N or C / N (carrier to noise ratio) or average bit error rate for digital signals).

f) Service type.

Upon receiving this signal, the control unit 38 checks the content,
The wireless base station 30-n searches for a communicable empty channel stored therein. As a result, when it is determined that there is an empty channel that satisfies the type of service desired by the mobile radio device 50 and that the required communication quality can be secured for a certain period of time even after the channel switching as the communication quality, the own radio base station From 30-n, it is decided to inform the mobile radio device 50 of the reception state. For this purpose, first, the own ID, the ID of the transmitting mobile radio device 50 and the radio base station 30-1, 30-2,. (N-
1) The ID and the like are transmitted, and the switches SW1-1 and SW1-1 of the switch group 23 are transmitted.
1-2 and 1-n are simultaneously turned on, and the radio base station 30-n
, The radio base stations 30-1, 30-2, ..., 30- (n-1)
(Hereinafter abbreviated as 30-1) requests transmission of the same call signal. However, as will be described later, this operation can be omitted when the modulation format of the signal used in the wireless transmission path is an amplitude-modulated wave or when the frequency modulation is shallow modulation.

Next, regarding the transmission timing of the communication signal in response to the transmission request of the same communication signal as that of the radio base station 30-1 to the radio base station 30-n, the transmission timing is determined based on the reception state of e). That is, if the reception condition is extremely good, for example, if C / N = 40 dB or more, immediately transmit, C / N = 39 to 30 dB
2 seconds later, 4 seconds after C / N = 29-20 dB, C / N =
In the case of 19 to 15, the mobile radio device changes the return timing according to the reception C / N value according to a procedure determined in the system so that transmission is performed after a fixed time such as 6 seconds.
Send to 50. The reason for taking this timing is to prevent interference by transmitting a simultaneous control signal with another radio base station 30 beforehand, and to prevent the mobile radio 50
However, this is to make it easier to select the radio base station 30-n or the like having a good reception state.

The signal transmitted from the radio base station 30-n to the mobile radio device 50 includes the following content.

1) Call signal: Downlink (telephone network 10) obtained from the gateway exchange 20
) Call signal from the phone inside to the mobile radio 50.

This is exactly the same as the call signal currently being transmitted from the wireless base station 30-1 or the like to the mobile wireless device 50. Also, the modulation level of the signal wave performed by the modulator included in the transmission unit 31 of the radio base station 30-n is set to be the same as that of the radio base station 30-1 or the like.

2] Control signal... This includes the following signals.

2-1) Mobile radio 50 received by own radio base station 30-n
ID.

2-2) ID of own radio base station 30-n.

2-3) A communication channel number that can be used by its own radio base station 30-n (no interference) and that matches the service distinction and communication type.

2-4) Reception State (Reception C / N Value, etc.) A control signal including such information transmitted by the radio base station 30-n is received by the mobile radio device 50.

In this way, it is sent from each wireless base station 30-n etc.
The control unit 58 of the mobile radio device 50 having obtained the information such as the C / N value compares the plurality of pieces of information, and as a result, the measurement result of the radio base station 30-n has the best value, and the quality standard level L ₂ As described above, if it is confirmed that L ₂ > L ₁ is satisfied, the mobile radio device 50 determines that it has approached the vicinity of the communication zone (zone n) of the radio base station 30-n, and performs channel switching. Decide what to do.

Then, as a result of examining the ID and the roaming area information collating and storing unit 54 to check the vacant communication channel in the zone n, the channel CHn is notified as notified from the radio base station 30-n.
Know that is available. Therefore, using the uplink control channel, the control signal instructs the radio base station 30-n to perform transmission / reception on the channel CHn, and the switch group 23 to the gateway exchange 20 via the radio base station 30-n.
Switches SW1-1 and SW1-2, SW1- (n-1)
n are turned on at the same time, and the transmission of the same speech signal as that of the radio base stations 30-1, 30-2,..., 30- (n-1) is started to the radio base station 30-n. Request.

In response to these requests, the switchboard 20
The switch SW1-n 23 is also turned on, and the wireless base station 30-n starts transmitting a voice signal using the communication channel n. in this case,
Naturally, the modulation depth of the modulator of the radio base station is the same as that of the other radio base stations 30-2, 30-3, ..., 30-n.

To realize the transmission of this control signal, specifically,
When the control signal is an analog signal, as shown in FIG.
Outside low frequency f _D0 (for example, about 100 Hz) or high frequency f _D1 , f _D2 , f _D3 … F _D8 (for example, at intervals of 3.8 KHz to 0.1 KHz)
Eight waves up to 4.5 KHz, where n = 8) are used.

When there are many items to control, that is, control data,
May be further increased wavenumber frequency f _D0 ~f _D8 for control, it is also possible to take the subcarrier format. In this case, for example, or apply frequency modulation to the 1-wave or a plurality of waves of f _D0 ~f _D8, or by or multiplied by amplitude modulation, it is also possible to transmit more control data.

When a digital data signal is used as the control signal, it is also possible to digitally encode the voice signal and transmit the signals in a time-division multiplexed manner, as shown in FIG. As shown.

FIG. 3 shows a timing chart before and after the channel switching of the present system shown in FIGS. 1A, 1B and 1C.

In the third diagram describing the channel switching operation, the radio base station 30-1 and the mobile radio 50 and the radio base station that the quality of the channel CH1 is used by drops to the level L ₁ or less between 30- 1 or the communication quality monitoring unit 37 or 57 of the mobile radio 50 detects the channel CHn by the above-described process.
Then, preparations are started for enabling the transmission radio waves from the radio base station 30-n to be received in parallel.

That is, the control unit 58 of the mobile radio device 50 uses the synthesizers 55-1 to 55-2,..., 55- (n-1) to transmit the transmission wave of the radio base station 30-1 by the channel CH1. Channel CH2
Transmitted by the radio base station 30-2,..., Channel CHn-1
, The synthesizer 55-n operates to receive the transmission wave of the channel CHn transmitted from the radio base station 30-n from the state of receiving the transmission wave of the radio base station 30- (n-1). Frequency is generated in the synthesizer 55-n.

Thus, when the communication with the radio base station 30-1 is about to be stopped due to the deterioration of the quality of the channel CH1 transmitted from the radio base station 30-1, the radio base station 30-n and the channel
Communication by CHn starts. That is, the mobile radio 50
Then, the repetitive switching of the changeover switch 64-1 receiving the changeover drive input signal from the reception changeover controller 65C is continued. At the same time, synthesizers 56-1,56-2, ..., 56-
By operating (n-1) and transmitting to the radio base stations 30-1 to 30- (n-1) using the channels CH1 to CHn-1, the synthesizer 55-n is also operated, Wireless base station 30-n
To a state where transmission can be performed by channel CHn. Synthesizer 56- used for this transmission
The outputs of 1,56-2 ..., 56-n are switched by the changeover switch 64-2.
Repetitive switching is performed by a switching drive input signal from the transmission switching controller 67C.

Channels CH1 and CH2, ......, the switching transceiver period and CHn are transmitted and received in parallel, the mobile radio 50 to ensure that the quality of the check and the channel of the channel CHn is a certain level L ₂ or After that, the channel CH1 is released, and the radio base stations 30-2, 30-3,.
, And CHn are continued without interruption by only the channels CH2, CH3,..., CHn.

Changeover switches 64-1 and 64-2 during this changeover transmission / reception period
Switching frequency f ₁ of is determined to 2n times like the highest frequency contained in the example signal. Hereinafter, this will be described in detail.

An optimum value is determined for the switching frequency in consideration of the following conditions.

1) Modulation format of a signal to be transmitted 2) Signal frequency band to be transmitted 3) Control frequency band to be transmitted 4) Band characteristics of a transmission / reception unit, especially a band characteristic of a high frequency filter installed at an antenna input terminal 5) Waveform characteristics of switching controller 6) Response characteristics of frequency synthesizer 7) Carrier frequency and number of channels used in system 8) Radio wave propagation characteristics of transmission line 9) Moving from gateway exchange 20 via radio base station 30-1 A transmission delay time difference due to a difference between a signal transmission path to the radio device 50 and a signal transmission path from the radio system controller 20 to the mobile radio device 50 via the radio base station 30-2. 0) is an audio signal
When the control signal out of the band shown in FIG. 2 (a) is used as 3 to 3.0 KHz, 3), it is 0.3 KHz or less (f _D0 ) or 3.8 to 3.0 KHz.
To become _{4.5KHz (f D1, f D2 ......} f D8). 4)
The response characteristics of the synthesizer in 6) are good at the passband bandwidth of 16KHz (or 8KHz) and 5),
The selection should be made in consideration of the good output waveform, and it is desired that the synthesizer to be used has a quick and rapid response characteristic by the input of the switching controller in 5).

7) to 9) are items to be considered in terms of system design. In the car telephone system described as the embodiment of the present invention, since 7) is 900 MHz and 600 channels, the used frequency bandwidth is 15 MHz (or , 15 MHz for 1200 channels),
8) is known in many documents, and 9) is about 0.03 ms.

Considering the above comprehensively, for example, in the mobile telephone system, the switching frequency of the selector switch 64-2 of the mobile radio device 50 is selected to be about 20 × n MHz.

Hereinafter, the case of reception will be described. When the audio signal and the control signal are digitized as shown in FIG. 2 (b), it is appropriate to use a higher frequency as the switching frequency, and to use a value of about n × 20 KHz to 30 KHz. Good.

Also, the channels CH1,2, CH2 seen from the input section of the reception mixer 63
Let the carrier frequencies of 3, ..., n−1, n be ω ₁ , ω ₂ ,…, ω _n−1 , ω
_n , and synthesizers 55-1, 55-2, ..., 55- (n-1), 55-
n, the output frequencies of ω _L1 , ω _L2 , ω _Ln−1 , ω _Ln
, 30− (n−1), 30−
The frequency of the carrier at the output of the intermediate frequency amplifier included in the reception mixer 63 from n is Ω ₁ = ω ₁ −ω _L1 ( ₁₁ ) Ω ₂ = ω ₂ −ω _L2 (1 ₂ )... Ω _{n -1} = ω _n-1 −ω _Ln-1 (1 _n-1 ) Ω _n = ω _n −ω _Ln (1 _n ) That is, the operation of the changeover switch 64-1 causes the receiving unit 53 to output Ω as an intermediate frequency. _{1 = ω 1 -ω L1 Ω 2} = ω 2 -ω L2 ...... Ω n-1 = the signal wave is successively with _{ω n-1 -ω Ln-1} Ω n = ω n -ω Ln carrier frequency, such as Will be entered. (1 ₁ ) and (1 ₂ )..., (1 _n-1 ) have a relationship of Ω ₁ ≒ Ω ₂ ≒... ≒ Ω _n-1 = Ω _n (2). Such a signal is amplified by the receiving unit and then demodulated by the demodulation circuit. The n intermediate frequencies ω ₁ −ω _L1 ω ₂ −ω _L2 ... Ω _n−1 −ω _Ln−1 ω _n −ω _If there is a frequency difference from _Ln , the demodulated output signal may or may not have distortion noise. That is, in the case of frequency modulation or phase modulation, no distortion noise occurs when there is no frequency difference, but when there is a frequency difference, it occurs when the frequency difference (beat frequency) contains the same component as the signal frequency. If not included, it does not occur.

On the other hand, in the case of amplitude modulation, distortion noise does not occur even if there is a frequency difference. However, even in the case of amplitude modulation, if the intermediate frequency amplifier or the like has non-linear characteristics, non-linear distortion due to higher harmonics occurs. Therefore, it is necessary to use an amplifier having good linearity.

Even if the local oscillation frequencies for CH1, CH2,..., CHn _-1 and CHn are cyclically applied to the input of the reception mixer 63 of the mobile radio device 50 as described above and received, there is no abnormality in the communication. It is theoretically explained that the transition from CH1 to channel CHn can be executed without any interruption (no noise is mixed) and that there is a reception diversity effect.

 First, a case where an angle-modulated wave is used will be described.

The data or audio signal (for signals in analog or digital form) can be expressed as:

The control signal existing outside the band is Where a _i is the magnitude of the amplitude, ω _i is the angular frequency of the signal,
θ _i represents the phase when t = 0. m and n represent positive integers.

Next, the case of frequency modulation will be described, but the present invention is similarly applied to phase modulation. Equation (3) or (3)
When the carrier is frequency-modulated by the equations (4) and (4), the modulated wave obtained is: I = I ₀ sin∫ (ω + μ (t)) dt = I ₀ sin (ωt + s (t)) (5) or I = I ₀ sin∫ (ω + μ (t) + μ _c (t)) dt = I ₀ sin (ωt + s (t) + s _c (t)) (5 ′) where m _i = a _i / ω _i (i = 1,2,3... n) For simplicity, θ _i = 0 (i = 1,2,3... n). As a result, s (t) + s _c (t) represents a general form of transmission signal.

By the way, when the equation (5) or (5 ') is used, the signals transmitted from the radio base stations 30-1, 30-2, ..., 30- (n-1), 30-n are transmitted to the mobile radio 50. , And is mixed with the local oscillator output (in FIG. 1B, synthesizers 55-1, 55-2,..., 55- (n-1), 55-n). And the input of the receiving unit 53 can be represented by the following equation using the same symbols as the equations (1) and (2).
(However, the changeover switch 64-1 is in a stopped state.)

I _i = I _{0 i} sin (Ω _i t + s (t) + s _ci (t)) (6) (i = 1, 2,..., N) Next, it is assumed that the changeover switch 64-1 starts the changeover operation. The mobile radio 50 receives the voice signal s (t) and the control signal s _ci (t) from the radio base station 30-i (i = 1, 2,..., N). As an input of part 53, Here, p is the switching angular frequency, m is a positive odd number, and the switching times for n input waves are equally spaced. When the right side of the equation (7) is transformed, the following equation is obtained.

I = (I ₀₁ / n) [sin ｛Ω ₁ t + U ₁ (t)｝ + (π / n) sin (π / n) × [cos ｛(Ω ₁ -p) t + U ₁ (t) ｝ −cos ｛(Ω ₁ + p) t + U ₁ (t)｝] + (3π / n) sin (3π / n) × [cos ｛(Ω ₁ -3p) t + U ₁ (t)｝ − cos ｛(Ω ₁ + 3p) t + U ₁ (t)｝] + (5π / n) sin (5π / n) × [cos ｛(Ω ₁ -5p) t + U ₁ (t)｝ -cos ｛ (Ω ₁ + 5p) t + U ₁ (t)｝] + ……] + (I ₀₂ / n) [sin ｛Ω ₂ t + U ₂ (t)｝ + (π / n) sin (π / n ) × [cos ｛(Ω ₂ -p) t + U ₂ (t)｝ -cos ｛(Ω ₂ + p) t + U ₂ (t)｝] + (3π / n) sin (3π / n) × [Cos ｛(Ω ₂ -3p) t + U ₂ (t)｝ -cos ｛(Ω ₂ + 3p) t + U ₂ (t)｝] + (5π / n) sin (5π / n) × [cos ｛(Ω ₂ -5p) t + U ₂ (t)｝ −cos ｛(Ω ₂ + 5p) t + U ₂ (t)｝] + ……] + …… …… + (I _0n / n) [ sin ｛Ω _n t + U _n (t)｝ + (π / n) sin (π / n) × [cos ｛(Ω _n -p) t + U _n (t)｝ −cos ｛(Ω _n + p _{) t + U n (t)} }] + (3π / n) sin (3π / n) × [cos {(Ω n -3p) t + U n (t)} -cos {(Ω n + 3p) t + U _n (t)｝] + (5π / n) sin ( 5π / n) × [cos {(Ω n -5p) t + U n (t)} -cos {(Ω n + 5p) t + U n (t)}] + ... …] (8) where U _i (t) = s (t) + s _ci (t) (i = 1, 2,..., N) Here, looking at equation (8), it is assumed that many carriers are combined. Therefore, if the signal is demodulated after being amplified by the intermediate frequency amplifier as it is, distortion noise due to cross modulation (interference interference) may generally occur.

Further, the amplitudes I ₀₁ , I ₀₂ ,
…, I _0n are not necessarily the same amplitude, but when the time occupancy of switching is equal (when the duty is 100 / n%)
, I ₀₂ , I ₀₃ ,..., I _0n are usually larger because 30-2 is closer than the radio base station 30-1. I ₀₁ , I
_If the magnitudes such as ₀₂ differ, cross-modulation may occur. The cause of the combination of many carriers shown in the above equation (8) and the cause of the difference of I ₀₁ , I _02, etc.
There are different types of cross-modulation sources.

By the way, with respect to the intermodulation in the case of combining a large number of carrier waves shown in Expression (8), the distortion noise can be removed by the following method.

That is, there is a method of increasing the switching speed (period) of the changeover switch 64-1 to drive it out of the bandpass characteristics of the intermediate frequency amplifier. However, as already mentioned, in many cases where the switching frequency is determined to be more than 2n times the highest frequency of the signal, it will not be necessary to increase it further. By increasing the speed, m = 1,3,5 on the right side of equation (7) ...
Can be ignored in the intermediate frequency amplifying stage as can be seen from equation (8), and equation (8) can be expressed as follows.

I = I ₀₁ sin (Ω ₁ t + s (t) + s _c1 (t)) + I ₀₂ sin (Ω ₂ t + s (t) + s _c2 (t)) + …… + I _0n sin (Ω _{n− 1} t + s (t) + s _cn (t)) (9) In equation (9), Ω ₁ = Ω ₂ =... Ω _n-1 = Ω _n = Ω (10) s _c2 (t) =. .. = _Scn-1 (t) = _scn (t) = 0 (11) Actually, equation (10) is technically possible by means described later, and equation (11) is obtained from the radio base station 30-1 as described above (or only from the radio base station 30-n in the latter half of channel switching). If only the control signal to be transmitted is used, equation (11) holds. Then, equation (9) can be modified as follows.

I = I ₀₁ sin (Ωt + s (t) + s _c1 (t)) + I ₀₂ + I ₀₃ +... + I _0n ) × sin (Ωt + s (t)) (12) When equation (12) is transformed, Become.

^{_{I = (I 01 2 + I}} n 2 + 2I 01 I n × cos s c (t)) 1/2 × sin (Ωt + s (t) + β (t)) (13) β (t) = tan -1 [ sin s _c (t) × ｛(I ₀₁ / I _n ) + cos s _c (t)｝ ^-1 ] (13 ′) I _n = I ₀₂ + I ₀₃ +... + I _0n (13 ″) (13), (13 ') because it is _{I 01 << I n (14)} s c (t) << 1 (14 in formula') (13) is as follows approximately.

_{I = I n sin (Ωt +} s (t) + s c (t)) (15) (15) With regard to formula, which is a switching receive diversity scheme with antenna input of n branches, after switching the received signals, it is As a result of performing so-called straight line synthesis,
This indicates that the synthesis was performed using an input signal having a high input electric field, ignoring _I01 having a low input electric field. Therefore, it has been clarified that the present invention has a reception diversity effect.

From the equation (14), the output of the frequency discriminating circuit (the output of the wireless receiving circuit 68) is expressed by the following equation.

E = d / dt ｛s (t) + s _c (t)｝ = μ (t) + μ _c (t) (16) Here, μ (t) and μ _c (t) are expressed by equation (3) and This is shown in equation (4). Expression (14) is always satisfied in the ordinary mobile communication system, and is not particularly limited. It applies a deep modulation to the main audio signal compared to the control signal, and a shallow modulation to the control signal. In addition, the depth of the modulation applied to the voice has recently been reduced to 3.5 radians (1 KHz) with an equivalent tone (1 KHz) signal. This is because when the carrier wave interval is 25 KHz, and when the carrier wave interval is 12.5 KHz, it is also as shallow as 1.75 radians.

From the above, it has been clarified that the equations (10) and (14) are sufficient conditions for the distortion-free condition in the case of frequency modulation.
Hereinafter, technical conditions for satisfying the expression (10) will be described.

To do this technically, the radio base stations 30-1, 30-2,
, 30-n is achieved by increasing the frequency stability of the reference crystal oscillator that determines the stability of the carrier frequency of the transmission units 31-1, 31-2,..., 31-n. For example, in an example of a car phone system to be described later, the stability of a reference crystal oscillator installed in a base station is currently about 0.5 to 1 ppm (0.5 to 1 × 10 ⁻⁶ ). × 10 ^-6 × 900MHz = 900Hz
It is. In this case, noise is mixed in the signal band of the voice.

However, if 0.01 ppm is made possible by the advancement of technology, 1 × 10 ⁻⁸ × 900 MHz = 9 Hz, and even if there is a harmonic of noise, there is little possibility that the large energy is mixed into the signal band. Become. Alternatively, in a wireless system using a carrier frequency of 9 MHz, a carrier fluctuation of 1 ppm does not cause noise contamination even in the current technology.

The case where the mobile radio device 50 receives the signal has been described above. The case where the mobile radio device 50 transmits the signal will be described below.

In FIG. 1B, the radio signal switched by the changeover switch 64-2 is, for example, sequentially switched to the radio channels CH1, CH2,..., CHn, but the reception side is the radio base station 30-1 (CH1),
30-2 (CH2),... Or the radio base station 30-n (CHn) are separately received, and there is no intermodulation problem when mixed as in the case of reception at the mobile radio device 50 side. is there. However, as is evident from equation (8), since there is a component of the carrier angular frequency (Ω ± np) as a sideband, these components are emitted into space and used for communication with other channels or other systems. It is necessary to provide a band-pass filter at the transmission output unit so as not to cause interference and to perform filtering.

For this purpose, it is necessary to spread the equation (Ω ± np) outside the frequency of all channels transmitted by the mobile radio device 50 as the switching frequency, and the car telephone system shown in FIGS. 1A and 1B used in the example is used. Then, it is necessary to set p / (2π)> 15 × nMHz.

This will be described below using mathematical expressions. However, the characters used in the formula are the same as described above unless otherwise specified. For example, the transmission signal appearing at the output of the transmission mixer 61 in FIG. 1H is represented by the following equation.

Here, p is the switching angular frequency, m is a positive odd number, and the switching times for n input waves are equally spaced. When equation (13) is transformed, an equation of the same form as equation (8) is obtained. With respect to the obtained equation, the following equation is obtained as an output signal when the obtained signal passes through a bandpass filter having the operation as described above.

I = I ₀ sin ｛Ω ₁ t + s (t) + s _c (t)｝ + I ₀ sin ｛Ω ₂ t + s (t) + s _c (t)｝ + …… …… + I ₀ sin ｛Ω _n t + s (t) + s _c (t)｝ (16) In the above equation, the first term on the right side is for the radio base station 30-1, and the second term is
The term is for 30-2, and the i-th term is for 30-i, and each signal has the same formula as that in the case of transmission of ordinary frequency modulation.

The uplink signal of channel CH1 is received by radio base station 30-1, the uplink signal of channel CH2 is received by channel 30-2, and the uplink signal of channel CHn is received by channel radio 30-n. These received signals are demodulated and transmitted to necessary devices such as the gateway switch 20. Alternatively, when the radio base station 30-1 has the configuration shown in FIGS. 1E and 1F, the uplink signal of the channel CH1 is transmitted to the radio base station 30-
The uplink signal of the transceiver 90-1 of channel 1 and the channel CH2 are received and demodulated by the transceiver 90-2 of the channel 30n, and the uplink signal of the channel CHn is sequentially demodulated by the transceiver 90-n of the channel 30-1. , May be mixed and transmitted to a necessary device such as the gateway exchange 20.

As is apparent from the above description, the use of the multiplex transmission method and apparatus of the present invention makes it possible to obtain a signal diversity effect in the receiving unit.

In the gateway switch 20, among the n signals from the radio base stations 30-1, 30-2,..., 30-n, the voice signal is transmitted to the radio base stations 30-1, 30-2,. Mix the signals from n. In mixing, signals from the radio base stations 30-2, 30-3,..., 30-n have better transmission quality than 30-1, so they may be mixed as they are, or may be proportional to S / N. The output may be mixed. That is, the reception diversity effect is obtained.

The transmission / reception diversity effect of the present invention has been described above, and a method for increasing the effect will be described in detail below.

First, regarding reception diversity, in the sequential switching method described above, each of the synthesizers 55-1 and 55-
2, ..., 55-n connection durations (duty times) are assumed to be equal. However, this is not always necessary. Rather, the diversity effect is increased by connecting to a radio channel having a good S / N reception input for a relatively long time. To this end, a part of the receiving unit is synchronized with the changeover switch 64-1 to detect the signal-to-noise ratio at that time, and transmits this to the control unit 58, thereby changing the frequency of the output of the reception switching controller 65C. Thereby, the above-mentioned object can be achieved. This is also possible with the configuration of FIG. 1B, but for the purpose of
The configuration shown in FIG.

1B is different from FIG. 1B in that a C / N measurement receiving unit 52, a receiving mixer 73, and a changeover switch 64-3 are installed separately from the radio reception circuit 68, and the control of the changeover switch 64-3 is not performed. This is to be performed by the control unit 58B. The first below
The operation of FIG.

In the figure, a reception mixer 73 is provided at a preceding stage to operate the C / N measurement receiving unit 52. A part of the reception signal received by the mobile radio device 50B is added to the reception mixer 73. As the local oscillation frequency to the reception mixer 73,
The output from the changeover switch 64-3 is added. However, the changeover switch 64-3 does not need to be switched at high speed unlike the other changeover switches 64-1 and 64-2, and a low speed of, for example, about 10 Hz is sufficient. Then, when the changeover switch 64-3 is at the position where the output of the synthesizer 55-1 is turned on, the C / N value of the channel CH1 measured by the C / N measurement receiving unit 52 is transmitted to the control unit 58B. Next, the changeover switch 64-3 is the synthesizer 55-2
Measure the C / N of channel CH2 when it is in the position to turn on the output of. Hereinafter, when the output of the synthesizer 55-n is sequentially turned on, the C / N of the channel CHn is measured and transmitted to the control unit 58B. The control unit 58B uses these values to control the reception switching controller 65C and the transmission switching controller 67C.
Are controlled, for example, to operate at speeds inversely proportional to C / N, respectively.

In order to enable the above-described operation, a slight change is required in the method of transmitting a signal from each of the above-described radio base stations 30, and this will be described below.

By the way, if the above formula (9) is re-posted, In equation (9), the control signal transmitted from each wireless base station 30 includes the ID of the wireless base station 30, and this ID is necessary to change the duty of the above-described changeover switch. As in the aforementioned equation (11), s _ci = 0 (i = 1, 2,..., N) cannot be set. So in this case (10)
Although the equation holds, the equation corresponding to equation (12) is as follows.

Since each s _ci (t) in Expression (17) is sufficiently smaller than 1, the following expression is approximately obtained as an expression corresponding to Expression (15).

In order to demodulate the signal represented by the equation (18) and extract a control signal transmitted from each radio base station 30, filtering is performed by making the frequency components of the signal included in s _ci (t) different from each other. It is possible to filter with a filter.

Therefore, by measuring the C / N of each wireless channel and adding the ID of the wireless base station 30 that has transmitted the signal to the control unit 58B, the control unit 58B controls each wireless channel, that is, each wireless base station. The duty time for receiving (or transmitting) for each 30 can be determined in relation to the C / N value.

In order to achieve the above effects with the configuration of FIG. 1B, the control signal _sc1 (t) transmitted from each of the radio base stations 30-1, 30-2,..., 30-n to the receiving unit 53 of FIG. ), s _c2 (t)..., s _cn (t) are provided, and each of them has a communication quality monitoring means such as measuring a signal-to-noise ratio. Good. Then, the measurement value is reported to the control unit 58, and the changeover switch 64-1 may be operated with a switching duty according to the signal-to-noise ratio.

By operating the receiving unit 53 of the mobile radio device 50 as described in detail above, it is possible to increase the transmission / reception diversity effect.

Next, a method for further increasing the reception diversity effect will be described. FIG. 1H shows the mobile radio 50 in this case.
3 shows a configuration example of C.

In FIG. 1H, an input radio wave (input signal) to the mobile radio device 50C is divided into n + 1 equal parts at an antenna input unit, and the radio reception circuits 68-1, 68-2,..., 68-n and the interference detector 62, respectively.
To arrive. In each of the wireless receiving circuits 68-1 to 68-n, the receiving mixers 63-1, 63-2,..., 63-n and the receiving units 53-1, 53-2,.
, and the local oscillation frequencies from the synthesizers 55-1 to 55-n are input to the reception mixers 53-1 to 53-n, respectively. Accordingly, in the configuration of FIG. 1H, there is no reception changeover switch 64-1 and each radio channel CH1, CH2,
.., It is possible to receive and demodulate the CHn signal.

Also, the output signals of these receiving units 53-1 to 53-n are partially sent to the control unit 58C, and the communication quality monitoring units 57-1, 57-2,
, 57-n to monitor the communication quality of each wireless channel, report the result to the control unit 58C, and furthermore, to the receiving unit 53-n.
The outputs 1 to 53-n are applied to a signal mixing circuit 62, subjected to the same processing as that of a normal diversity receiver (in this case, synthesis after detection), and sent to a telephone unit 59.

By adopting the circuit configuration as shown in FIG. 1H, a large diversity effect can be obtained.

As is clear from the above description, the operation of the present invention is to measure the transmission frequency of the mobile radio device 50 by the radio base station 30 to predict the frequency shift after the switching to the new communication channel, and It is characterized in that by setting and using a transmission channel of a radio base station that communicates after the channel switching at an appropriate frequency, noise due to communication interruption or intermodulation occurring due to the channel switching is removed.

Next, how to use a control signal which plays an important role in channel switching during a call according to the present invention will be described. In the following description, the configuration shown in FIG. 1B is assumed.

From the radio base stations 30-1, 30-2, ..., 30-n, channels CH1, CH2,
.., A case of transmitting to the mobile wireless device 50 using CHn will be described.

When the above-described channel switching preparation operation is completed, the wireless receiving circuit 68 of the mobile wireless device 50 includes the wireless base stations 30-1, 30-2,.
.., CHn from 0-n, which are sequentially switched by the changeover switch 64-1 in the mobile radio device 50, and received by switching. In addition, since the changeover switch 64-2 also starts operating, the transmission wave from the mobile radio device 50 also starts switching transmission.

Here, the delay time difference due to the difference (within 10 km) between the routes from the gateway exchange 20 to the mobile radio device 50 via the radio base stations 30-1 to 30-n is at most 0.03 ms or less.
The operation can be ignored without any hindrance. Also,
Downstream signals from the radio base stations 30-2, 30-3,..., 30- (n-1) are only audio signals.
Downlink signals from 30-n include, in addition to audio signals, control signals (identification signals for identifying the radio base stations 30-1 and 30-n,
Since the switching command signal) is inserted in the form of an out-of-band signal as shown in FIG. 2A, the wireless receiving circuit 68 of the mobile wireless device 50 receives the signal and transfers it to the control unit 58.

The control unit 58 identifies this signal, and under the control of the own control unit 58, initially, a channel switching response signal from the wireless base station 30-1 or a subsequent call signal using the channel CHn from the wireless base station 30-n. And the ID signal is transmitted, and the signal quality is also confirmed to be good. Therefore, the outgoing band of the uplink communication signal is used using the radio transmission circuit 68, and this confirmation item is transmitted to the radio base station 30-n using the communication channel CHn. Then, the gateway exchange 20 is notified to the gateway exchange 20 via 30-n.

In the gateway exchange 20, since the communication between the radio base station 30-n and the mobile radio 50 that the downlink communication is operating well is obtained, the communication path control unit 21 switches the switch SW1- of the switch group 23. 1,1
Among SW-2, ..., 1-n, only SW1-1 is turned off. on the other hand,
The mobile radio device 50 stops the transmission to the radio base station 30-1, stops the operation of the synthesizer 55-1 of its own mobile radio device 50, and operates the changeover switch 64-1 (FIG. 1B). Synthesizer 55
-2,55-3, ..., 55-n are made to perform the cyclic switching operation.

 These states are shown in FIG.

Next, a case where transmission is performed from the mobile radio device 50 to the radio base stations 30-1, 30-2,..., 30-n using the channels CH1, CH2,.

In the mobile wireless device 50, the reception switching controller 65C and the transmission switching controller 67C are respectively operated by the instruction of the control unit 58 in the own device, and the changeover switches 64-1 and 64-2 are operating. The output of synthesizers 55-1,55-2, ..., 55-n and the outputs of 56-1,56-2, ..., 56-n of
H1, CH2,..., CHn are being sequentially switched.
Figure). The signal transmitted to the communication channel during this operation includes a control signal outside the communication signal and out of band (FIG. 2 (a)).
As the state of the channel used by the mobile radio 50 (channel
.., CHn from CH1, CH2,..., CHn), the identification ID of the mobile radio 50, etc.
FIG tone signal such as f _D1 of (a) may be combined and f _D1 and f _D3) is added.

The uplink signal of the channel CHi received by the radio base station 30-i (i = 1, 2,..., N) is demodulated by the receiving unit 53 of the radio base station 30-i, and the demodulated audio signal and out-of-band signal Is confirmed to have no abnormality, and then transferred to the gateway exchange 20. In the gateway switch 20, among the n signals from the radio base stations 30-1, 30-2,..., 30-n, the voice signals are transmitted to the radio base stations 30-1, 30-2.
…, Mix the signals from 30-n. In the gateway switch 20, out of the n signals from the radio base stations 30-1, 30-2, ..., 30-n,
Each of the radio base stations 30-1, 30-2,..., 30-n is provided with an identification signal transmitted outside the band of the voice added by the radio base stations 30-1, 30-2,. Channels CH1, CH2,…, CH from n
Check that the signal is from n.

In the gateway exchange 20, it is confirmed that the channel switching operation during the call is progressing smoothly, and the control unit 38 of the mobile radio device 50 is transmitted to the radio base station 30-n via the radio base station 30-n. It reports that it is possible to stop communication with channel -1 and channel CH1, and to concentrate on communication with radio base stations 30-2, 30-3, ..., 30-n.

The mobile wireless device 50 that has received this control signal
By the operation of 58, the operations of the synthesizers 55-1 and 56-1 are stopped, and the position of the switch 64-1 for selecting the receiving channel is cyclically switched among the synthesizers 55-2, 55-3, ..., 55-n. Activate the switch 64-2 for selecting the transmission channel.
, The synthesizers 56-2, 56-3,..., 56-n are instructed to continue the circulation switching operation.

As a result, the mobile radio device 50 sets the channel CH1 up to that point.
Communication with the wireless base station 30-1 using the
30-2, 30-3,…, 30-n and channels CH2, CH3,…, CH, respectively
You are ready to communicate using n. With this, the channel switching is completed, and a state where communication is performed in the new wireless channel group is realized. The switching operation between the uplink channel and the downlink channel described above is executed in parallel and ends almost at the same time.

As is evident from the above description, there is no instantaneous interruption at the time of channel switching, and it is possible to keep noise at a low level that causes no practical problem.

If any of the above-mentioned operations cause a malfunction or a malfunction, the operation is restarted from the immediately preceding operation. When the operation failure is large, the control unit 58
There is also provided an operation for returning to the communication channel before the switching operation, which is stored in the memory unit built in the.

7A to 7E show FIGS. 1A, 1B and 1C.
A flow chart showing the flow of the operation of the system shown in the figure is shown.

The gateway exchange 20, the radio base stations 30-1, 30-2,..., 30-n and the mobile radio 50 start operating, and the switches SW1-1, 1-2, of the switch group 23 included in the gateway exchange 20. , 1- (n-1) are on and the radio base stations 30-1, 30-2, ..., 30- (n-1)
And the mobile radio 50 are communicating. In this communication,
Mobile channel CH1, CH2 instructed by the control unit 58 included in the wireless device 50, ..., CH- (n- 1) of the downlink frequencies F _1, F _2,
, F _n-1 and uplink frequencies f ₁ , f ₂ ,..., F _n-1 are used (S101, FIG. 7A).

.., 30- (n-1) constantly receiving the reception status report from the mobile radio device 50, and if a deterioration in the communication quality is found, It is immediately reported to the mobile radio 50 (S102). Mobile radio 50 receiving this
In the communication quality monitoring unit 57 (S103), communication quality level L ₁
It is monitored whether or not it has deteriorated (S104).
If the call quality is not degraded than the level L ₁ (S104YE
S), the control unit 58 sends the radio base station 30-1, 30-3,..., 30-n, etc., around the radio base station 30-1, to the radio base station 30-1,
Monitor signals of uplink frequencies f ₁ , f ₂ ,..., F _n-1 used for communication between 30-2, 30-3, ..., 30- (n-1) and mobile radio device 50. An instruction is given to receive (S105, FIG. 7B).

The monitor receiver near the radio base station 30 instructs the received (e.g. 30-n), and monitoring receiving a signal of a frequency f ₁ (S1
06), the result is reported to the communication quality monitoring unit 57 of the mobile radio device 50 (S107, S108), and the monitor reception quality from each radio base station 30 is measured and compared, for example, the communication quality of the radio base station 30-n. There detects that better than the level L ₂ of the constant reference (S109
YES).

If the communication quality is not good (S109NO), step S105
Returning to the above, the other radio base station 30 is monitored and received.

Therefore, the control unit 58 determines that the own mobile radio device 50 is the radio base station 30-1.
Is determined to have moved from the zone covered by the wireless base station 30-n to the zone covered by the wireless base station 30-n (S110, FIG. 7C), and in order to switch to communication with the wireless base station 30-n, the wireless base station 30-n Searches for available channels (S111),
As a result, the channel CHn is determined (S112). Control unit 58
The transmitting unit 51-n and the receiving unit 53-n of the mobile radio 50,
Command to prepare for communication on channel CHn (S11
3).

The communication preparation command for using the channel CHn is sent to the radio base station 30-n to prepare for communication using the channel CHn (S114). Mobile radio 50 is ready for enabling communication by the channel CHn, i.e., with respect to the control unit 58 Synthesizer 55-n and 56-n, receives a frequency F _n, so that it can transmit at the frequency f _n , And the switching controller 65 starts the switching operation (S115, FIG. 7D).

When the base station 30-n is ready to communicate using the channel CHn, the radio base station 30-n notifies the mobile radio device 50 of the preparation completion using the channel CHn (S116). -n reports to the gateway exchange 20 that the communication preparation between the radio base station 30-n and the mobile radio device 50 by the channel CHn has been completed (S116).

Radio base station 30-n and mobile radio 5 using channel CHn
When the gateway exchange 20 confirms the completion of the communication preparation with the switch 0 (S117), the switches SW1-1, 1-2,.
The switch SW1-n is also turned on while-(n-1) remains on (S118). Then, the communication path control unit 21 included in the gateway exchange 20 reports to the mobile radio 50 that communication with the mobile radio 50 can be started using the channel CHn (S119).

Upon receiving the communication start possibility report, the radio base station 30-n sends a communication start signal to the mobile radio device 50 using the channel CHn (S123). The mobile radio device 50 uses the ID signal that is the identification signal for identifying the radio base station 30-n to transmit the channel CHn.
(S124) and confirms the start of communication with
The communication quality monitoring unit 57 of the mobile radio 50 and the radio base station 30
the quality level of the communication between the -n measures, if it is detected that is constant quality level L ₂ or more (S125YES, the 7E
Figure), channel between the radio base station 30-1 and the mobile radio 50
The wireless base station 30-1 is instructed to stop the communication performed using CH1 (S126). As a result, the radio base station 30-1 turns off the communication by the channel CH1 (S127). When the mobile radio device 50 confirms that the communication by the channel CH1 has been stopped (S
129), stops the operation of synthesizers 55-1 and 56-1,
The changeover switch 64-1 stops switching to the output terminal of the synthesizer 55-1, and the changeover switch 64-2 stops switching to the output terminal of the synthesizer 56-1 (this operation is not necessarily required). , CHn, CH2, CH3,..., CHn.

The communication control unit 21 of the gateway exchange 20, which has confirmed that the channel CH1 communication has stopped, switches the switches SW1-2, 1-3,.
−n is kept on, and the switch SW1-1 is turned off (S
128).

As a result, the period of the channel switching operation ends, and the channel CH is switched on while the switches SW1-2, 1-3,...
2, CH3, ..., CHn down frequency _{F 2, F 3, ...,} F n uplink frequency f _2,
Using f ₃ ,..., f _n , the mobile radio 50
Between 0-3,..., And 30-n, high-quality communication can be continued with no transmission disconnection or noise contamination, and with a transmission / reception diversity effect (S130).

(6) Method of estimating the moving direction and moving speed of a mobile radio and allocating a communication channel for measures against traffic congestion Measure the change in the received electric field or communication quality received by a plurality of radio base stations 30 communicating with the mobile radio 50 Then, the traveling direction and speed of the mobile wireless device 50 can be detected by comparison. These will be described below with reference to FIG.

In FIG. 8, 16 circles indicate small zones Z1 to Z16 in the service area, respectively, from the radio base stations 30-1, 30-2,..., 30-16 installed near the center of the circle. , Respectively, indicate communicable areas. The mobile radio device 50 currently in communication is in the zone Z6, and the radio base stations 30-2, 30-3, 30-
It is assumed that communication with diversity is being performed with seven stations 5,30-6,30-7,30-10,30-11. Assuming that the mobile radio 50 is moving in the direction of the arrow in FIG.
In the above seven radio base stations receiving the transmission signal from
The reception electric field or reception quality is being measured, and these values are collected in the mobile radio 50. The mobile radio device 50 estimates the moving direction and speed of the mobile radio device 50 by the following method by comparing these measurement results.

First, it can be estimated that the moving direction is toward the wireless base station (30-7 in FIG. 8) in which the observed input reception electric field level changes in a direction in which it increases most rapidly. In order to obtain reliable results, it is important to select the measurement duration appropriately. However, this largely depends on the speed of the mobile radio 50. That is, since the radio wave propagation characteristics change every moment, a certain long time (3 to 10
(Seconds), and measurement is performed during the interval, thereby eliminating variation in measured values. FIG. 8 shows the measurement results obtained in this order from the radio base station 30 in which the input electric field increases in a large order. For example, 30-7>30-11> 30-3, and the input electric field decreases. If expressed in order from the wireless base station 30 having the largest value, 30-6>30-10>30-2> 36-5.

The moving speed can be estimated by comparing the moving speed with a radio wave propagation curve obtained from the radio wave propagation characteristics.

By using the above measurement results, the destination of the mobile radio device 50 is estimated, the communication traffic status of the radio base station 30 of the destination is checked, and when the radio base station 30 is congested, the radio base station
It is possible to reduce the number of wireless base stations 30 communicating with each other depending on the type of communication of the mobile wireless device 50 communicating at 30. Next, when the traffic congestion state extends over a plurality of zones instead of one zone, it is necessary to take measures for congestion over a wide area. This is a phenomenon occurring in a car telephone system or the like in the center of a large city, and it is assumed that 30-6, 30-7, and 30-11 in FIG. 8 are in a traffic congestion state. The application of the present invention to this will be described in detail.

It is assumed that a mobile radio device 50a is present in the zone Z11 and is traveling in the direction of the arrow, but has transmitted a call signal. This call signal is collected by the mobile radio device 50a, and a communication channel to be assigned is determined. When traffic is not congested, the radio base stations 30-6, 30-7, 30-10, 30-11 , 30-12,30-14,
A communication channel used in 30-15 etc. is allocated (diversity transmission / reception is performed). However, when traffic is congested at (Z6, 7, 11) in the above three zones, channels 30-6, 30-7 and 30-11 are not allocated. In this case, the radio base station 30 having the best communication quality is naturally 30-11 as a communication partner, but is not allocated for the above-described reason. If the multiplicity of diversity is not enough with the above quadruple (30-10,30-12,30-14,30-15),
The mobile radio device 50a can estimate the moving direction and the moving speed of the own mobile radio device 50a.
Assign channels to be used for 30-8 and 30-16. Therefore, the mobile radio device 50a starts communication with the radio base stations 30-8 and 30-16 which are slightly distant even though they are in the zone Z11.

By applying the channel assignment described above,
It is possible to take measures against congestion in a high-traffic area that has not been solved by the conventional system technology.

[Effects of the Invention] As is apparent from the above description, by applying the present invention to a mobile communication system using a small zone configuration, when a zone is changed during a call (communication) as in a conventional system, a temporary stoppage occurs. In the case of facsimile signals and data signals, image quality degradation and burst signal errors have been a problem, but even if the frequency of channel switching during communication increases, this concern has been completely eliminated. It will be economical transmission and reception diversity and to improve the communication quality by adopting multiple location registration to the gateway exchange from multiple wireless base stations that can communicate well with the mobile wireless device, The effective use of frequency has been improved by reducing interference, and a new service using a wideband signal has been made technically possible. In addition, communication quality is improved by effective use of wireless equipment when traffic is low, and when traffic increases sharply in a certain small zone, the available channels can be substantially increased. In addition to being able to process location registration signals from mobile radios, it is also possible to specify the effective communication channel by detecting the moving direction and speed of the moving object, making it economical and efficient in frequency use. Therefore, it is possible to construct a mobile communication system having a high level of effect, and the effect of the present invention is extremely large.

[Brief description of the drawings]

FIGS. 1A, 1B, and 1C are system configuration diagrams showing an embodiment of the present invention. FIGS. 1D and 1E are circuit configuration diagrams showing another embodiment of the radio base station of the present invention. FIG. 1 is a circuit diagram showing an embodiment of a transceiver, FIG. 1G, FIG. 1H and FIG. 1I are circuit diagrams showing another embodiment of the mobile radio, FIG. 2 (a) and (b) FIG. 3 is a spectrum diagram and a circuit configuration diagram for explaining a configuration example of a control signal used in the present invention; FIG. 3 is a timing chart for explaining the operation of the system shown in FIGS. 1A to 1C; FIGS. 4A and 4B are flow charts showing the flow of the location registration operation of the present invention, FIGS. 5A and 5B are flow charts showing the flow of a call operation from the mobile radio, FIGS. 6A, 6B and FIG. 6C is a flowchart showing the flow of an incoming call operation to the mobile radio, FIGS. 7A, 7B, 7C, 7D and 7E are flow charts showing the flow of the channel switching operation of the system shown in FIGS. 1A to 1C, and FIG. 8 is the detection of the traveling direction and speed of the mobile radio. FIG. 9 is a conceptual diagram of a system configuration for describing an example of a conventional system. 10: Telephone network, 11: Switchboard 12: Radio network controller, 13A-D: Radio base station 14A-D: Zone, 15: Mobile radio 16A-D: Transmission line, 19, 20 ... Gateway switch 21 ... Call path control unit, 23 ... Switch group 24 ... ID identification storage unit 30,30B, 30C, 30-1, ... 30-n ... Wireless base station 31,31-1 ... 31 -n: Transmitting unit 32: Radio base station controller 33, 33-1 to 33-n: Receiving unit 34, 34C, 34-1 to 34-n: ID identification storage unit 35-1 to 35- n, 36-1 to 36-n Synthesizer 37 Communication quality monitor 38, 38B, 38C Control 39 Interface 40, 40C Reference crystal oscillator 41 Transmit mixer, 42 Interference Interference detector 43 Reception mixer 45 Reception switching controller 46 Wireless transmission circuit 47 Transmission switching controller 48 Wireless reception circuit 50, 50B, 50C Mobile radio 51 Transmission Unit 53, 53-1 to 53-n ... Receiving unit 54 ... ID / ROHM area information collation storage unit 55-1 to 55-n, 56-1 to 56-n ... Synthesizer 57 Communication quality monitoring unit 58, 58B, 58C, 58D Control unit 59 Telephone unit 61, 61-1 to 61-n Transmit mixer 62 Interference detector 63, 63-1 63-n ...... Reception mixer 64-1,64-2,64-3 ...... Changeover switch 65C ...... Reception switching controller 66,66-1 ~ 66-n ...... Wireless transmission circuit 67C ...... Transmission switching Controllers 68, 68-1 to 68-n: wireless receiving circuit 69: mixing circuit 71: reference crystal oscillator 91: digital encoding circuit 92: multiplex conversion circuit 93-1 to 93-m: communication Quality monitoring receiver 94 Control transceiver 96 Antenna sharing device Z1 to Z16 Zone.

Claims (61)

(57) [Claims] 1. A radio base station (30, B, C) that covers a plurality of zones to form a service area, and mobile radio devices (50, B, C, and 50) existing in the service area. D)
When transmitting a location registration signal including its own identification information for registering a location from the mobile radio device, when the location registration signal of each of the radio base stations has a good communication quality of a predetermined communication quality or more At least one communicable radio base station received in the state transmits the location registration signal to the gateway exchange (20) connected by a transmission line with each of the radio base stations, and transfers the location registration signal. In the obtained gateway exchange, at least one communication is possible in which the identification information of the mobile radio device included in the location registration signal and the location registration signal from the mobile radio device are received in a good state of a predetermined communication quality or higher. While registering the identification information of the wireless base station, the registered information is returned to the mobile wireless device via the wireless base station related to the registered identification information,
A communication method for mobile communication, comprising storing the returned registered information in the mobile radio device that has received the reply. 2. When the mobile radio device (50, B, C, D) moves from a zone in which a location is registered and shifts to at least one or more new zones in which a location is to be newly registered, location registration is performed. 2. The communication method for mobile communication according to claim 1, wherein the communication is updated. 3. The mobile radio (50, 50) from a telephone of a general telephone network connected via the gateway exchange (20) or another mobile radio located in the service area.
When an incoming call to B, C, D) is made, the gateway exchange switches through all the radio base stations (30, B, C) that can communicate with the mobile radio device that has already been registered. 2. The communication method for mobile communication according to claim 1, wherein an incoming call signal is transmitted to said mobile wireless device. 4. At least one of the plurality of radio base stations (30, B, C) communicating with the mobile radio device (50, B, C, D) uses n transmitters (90). If communication of more than n channels is required due to an increase in communication traffic, at least one of the n transmitters has a transmission frequency corresponding to a plurality of radio channels. 2. The communication method for mobile communication according to claim 1, wherein the communication is repeatedly performed at a speed sufficiently higher than the frequency of the communication signal so as to transmit a plurality of wireless channels in parallel. 5. At least one of a plurality of radio base stations (30B, C) communicating with said mobile radio device (50, B, C, D),
It has n receivers (90), and when communication of n channels or more is required due to an increase in communication traffic, at least one of the n receivers has: 2. The method according to claim 1, wherein the receiving frequencies corresponding to the plurality of wireless channels are repeatedly switched at a speed sufficiently higher than the frequency of the communication signal to thereby operate the plurality of wireless channels in parallel. Communication method of mobile communication. 6. The communication system according to claim 6, wherein said gateway exchange (20) communicates with said mobile radios (50, B, C, D) already registered through all said radio base stations (30, B, C). 4. The communication method for mobile communication according to claim 3, wherein, when transmitting an incoming call signal to the mobile radio device, the incoming call signal is transmitted in an order of higher communication quality at the time of registration. 7. The gateway exchange (20) via all the radio base stations (30, B, C) which can communicate with the mobile radios (50, B, C, D) which have already been registered. When sending an incoming call signal to the mobile wireless device, a patent is included that includes an identification signal for identifying each of the wireless base stations that sends the incoming call signal and sends out the same at the same time from each of the wireless base stations. The communication method for mobile communication according to claim 3. 8. A radio base station (20, B, C) which covers a plurality of zones to form a service area, and wherein said radio base means exists in said service area and communicates with said radio base station. Mobile radio means (50, B, C, D) capable of connecting each of the radio base means to a general telephone network, and receiving the location registration signals from the mobile radio means and the mobile radio means in good condition Registering the identification information of at least one of the radio base means, and updating and registering the identification information of the communicable radio base means with the movement of the mobile radio means; Communication path setting control means (21, 2) for canceling the setting of the communication path between at least one registered radio base means and the mobile radio means for making and receiving a call;
A communication system for mobile communication, comprising: a gateway exchange means (20) having 3). 9. An ID identification storage means (24) for registering identification information of said wireless base means capable of communicating with said mobile wireless means and identification information of said mobile wireless means. ), A switch group means (23) capable of setting and releasing a communication path between at least one of the radio base means and the general telephone network or between the radio base means, and the ID identification storage means. 9. A communication path control means (21) for outputting a control signal for setting and releasing the communication path to at least the switch group means on the basis of the registered identification information. A communication system for mobile communication according to claim 1. 10. The wireless base means (30) comprises: a wireless receiving means (48) including a receiving mixer for receiving a designated wireless channel; and a wireless receiving means (48) for receiving the designated wireless channel by the receiving mixer. Receiving synthesizer means (35) for applying a required frequency to the radio signal; radio transmitting means (46) including a transmission mixer for transmitting the designated radio channel; and the designated radio channel to the transmission mixer. Transmitting synthesizer means (36) for applying a frequency necessary to transmit the signal; reference frequency oscillating means (40) for supplying a reference frequency to the receiving synthesizer means and the transmitting synthesizer means; Communication quality monitoring means (37) for monitoring the communication quality of the signal being received by the wireless receiving means and outputting communication quality information; and the gateway exchange (20) ID identification storage means (34) for storing the registered identification information, and the wireless channel to be received by the reception synthesizer means based on the identification information stored in the ID identification storage means. Control means for instructing the transmission channel to be transmitted to the transmission synthesizer means.
8) The communication system for mobile communication according to claim 8, comprising: 11. A receiving synthesizer means for generating a frequency required for receiving i uplink radio channels satisfying 2 ≦ i ≦ n out of n uplink radio channels, said radio base means (30B). (35) receiving channel switching means for sequentially switching the output of the receiving synthesizer means at a speed sufficiently higher than the frequency of the communication signal so that the i uplink radio channels can be received in parallel. (44-1); transmission synthesizer means (36) for generating a frequency required for transmission of i downlink radio channels satisfying 2 ≦ i ≦ n among the n downlink radio channels; Transmission channel switching means (4) for sequentially switching the output of the transmission synthesizer means at a speed sufficiently higher than the frequency of the communication signal so that the downlink wireless channels can be transmitted in parallel. 4-2), a reference frequency oscillating means (40) for supplying a reference frequency to the receiving synthesizer means and the transmitting synthesizer means, and a frequency to be generated in the receiving synthesizer means and the transmitting synthesizer means. 9. The mobile communication system according to claim 8, further comprising: control means (38B) for giving the instruction of (1), and giving an instruction of switching to said reception channel switching means and said transmission channel switching means. 12. The radio base unit (30C) includes: an antenna sharing unit (96); a plurality of transmission / reception units (90) each including a transmitter and a receiver connected to the antenna sharing unit; A plurality of communication quality monitoring means (93) for monitoring communication quality, at least one control transmission / reception means (94) for transmitting / receiving a control signal, and the plurality of transmission / reception means and at least one 9. A control means (38C) for instructing each of the control transmission / reception means to control a wireless channel to be transmitted and received, and controlling the plurality of communication quality monitoring means to instruct and control a wireless channel to be monitored. A communication system for mobile communication according to claim 1. 13. A receiving synthesizer means (35) for generating a frequency necessary for receiving i uplink radio channels satisfying 2 ≦ i ≦ n out of n uplink radio channels. ) And reception channel switching means (44) for sequentially switching the output of the reception synthesizer means at a speed sufficiently higher than the frequency of the communication signal so that the i uplink radio channels can be received in parallel. -1); transmitting synthesizer means (36) for generating a frequency necessary for transmission of i downlink radio channels satisfying 2 ≦ i ≦ n out of the n downlink radio channels; Transmission channel switching means (44-2) for sequentially switching the output of the transmission synthesizer means at a speed sufficiently higher than the frequency of the communication signal so that the wireless channels can be transmitted in parallel; 13. The communication system for mobile communication according to claim 12, comprising: 14. A receiving synthesizer means (55) for generating a frequency necessary for receiving i radio channels satisfying 2 ≦ i ≦ n among the n radio channels. Receiving channel switching means for sequentially switching the output of the receiving synthesizer means (55) at a speed sufficiently higher than the frequency of the communication signal so that the i wireless channels can be received in parallel. 64-1); and a wireless receiving means (68) including a receiving mixer for receiving the i wireless channels by applying an output of the receiving synthesizer means via the receiving channel switching means (64-1). ), Transmission synthesizer means (56) for generating a frequency required for transmission of i wireless channels satisfying 2 ≦ i ≦ n among the n wireless channels, and the i wireless channels are arranged in parallel. Send Transmission channel switching means (64-2) for sequentially switching the output of the transmission synthesizer means at a speed sufficiently higher than the frequency of the communication signal so that the output of the transmission synthesizer means (56) can be performed. Wireless transmission means (66) including a transmission mixer for transmitting the i wireless channels through the transmission channel switching means, and the transmission synthesizer means (56) and the reception synthesizer means ( 55) a reference frequency oscillating means (71) for supplying a reference frequency, a communication quality monitoring means (57) for monitoring the communication quality received by the wireless receiving means (68), Means for storing the identification information registered in the means (20).
4) and collating the storage contents of the ID roam / area information collating and storing means (54) and giving a switching instruction to the receiving channel switching means (64-1) and the transmitting channel switching means (64-2). 9. The mobile communication system according to claim 8, further comprising: control means (58) for instructing said reception synthesizer means (55) and said transmission synthesizer means (56) of a frequency to be generated. Communications system. 15. A receiving synthesizer means (55) for generating a frequency necessary for receiving i radio channels satisfying 2 ≦ i ≦ n among the n radio channels. Receiving channel switching means (64-1) for sequentially switching the output of the receiving synthesizer means at a speed sufficiently higher than the frequency of the communication signal so that the i wireless channels can be received in parallel. ), And an output of the receiving synthesizer means (55) applied via the receiving channel switching means (64-1), and a wireless receiving means (68) including a receiving mixer for receiving the i wireless channels. ), Transmission synthesizer means (56) for generating a frequency required for transmission of i wireless channels satisfying 2 ≦ i ≦ n among the n wireless channels, and the i wireless channels are arranged in parallel. Send Transmission channel switching means (64-2) for sequentially switching the output of the transmission synthesizer means (56) at a speed sufficiently higher than the frequency of the communication signal so that the output of the transmission synthesizer means (56) can be performed. ) Is applied through the transmission channel switching means (64-2) to transmit the i radio channels, the radio transmission means (66) including a transmission mixer for transmitting the radio channels, and Measurement channel switching means (64-) for sequentially switching the output of the reception synthesizer means (55) at a low speed so as to enable reception.
3) the output of the receiving synthesizer means (55) is applied via the measuring channel switching means (64-3) and the i
C / N measurement receiving means (52) for measuring the carrier-to-noise ratio of the plurality of wireless channels and outputting C / N data, and storing the identification information registered in the barrier exchange means (20). ID roam area collation storage means (5
4) and comparing the C / N data with the contents stored in the ID roam / area information collating and storing means (54), the receiving channel switching means (64-1) and the transmitting channel switching means (64-2) Control means for giving a switching instruction to the measurement channel switching means (64-3), and instructing the reception synthesizer means (55) and the transmission synthesizer means (56) of a frequency to be generated; 58B). The communication system for mobile communication according to claim 8, comprising: 16. A receiving synthesizer means (55) for generating a frequency required for receiving i radio channels satisfying 2 ≦ i ≦ n out of n radio channels, wherein said mobile radio means (50C) Wireless receiving means (68) including a receiving mixer for receiving the i wireless channels by receiving the outputs of the receiving synthesizer means; and 2 ≦ i ≦ n among the n wireless channels. transmitting synthesizer means (56) for generating a frequency required for transmission of the i wireless channels, and an output of the transmitting synthesizer means so that the i wireless channels can be transmitted in parallel. Transmission channel switching means (64-2) for sequentially switching at a speed sufficiently higher than the frequency of the communication signal; and an output of the transmission synthesizer means via the transmission channel switching means (64-2). Wireless transmission means (66) including a transmission mixer for transmitting the i number of wireless channels applied thereto, and a reference frequency for supplying a reference frequency to the transmission synthesizer means and the reception synthesizer means An oscillating means (71); a mixing means (69) for mixing communication signals from the wireless receiving means having received the i wireless channels to obtain a mixed communication signal; Communication quality monitoring means (57) for monitoring the communication quality to be received, and ID roam / area collation storage means (5) for storing the identification information registered in the gateway exchange means (20).
4) collating the storage contents of the ID roam / area information collating and storing means (54) with the output of the communication quality monitoring means (57), giving a switching instruction to the transmission channel switching means, 9. The mobile communication system according to claim 8, further comprising a synthesizer means (55) and a control means for instructing the transmission synthesizer means (56) of a frequency to be generated. 17. A radio base station (30, B, C) that covers a plurality of zones to form a service area, and a gateway exchange (20) that connects each radio base station to a general telephone network. ), The mobile radios (50, B,
C, D) and the radio base station (30, B, C), the mobile radios (50, B, C, D) must have communication signals of the same content. A wireless transmission process (66) and a wireless reception process (68) for performing diversity transmission / reception using at least one wireless channel. The gateway exchange (20) transmits a location registration signal from the mobile wireless device to a predetermined location. Upon receiving the location information and the communication quality information of the mobile radio device from at least one of the radio base stations received in a good state equal to or higher than the communication quality, the radio base station and the mobile radio device (50, B, C , D), the communication path is set and released, and the radio base station (30, B, C) being updated is updated so that the communication path can be changed. Communication method. 18. The mobile radio equipment according to an instruction from at least one of the mobile radio equipment (50, B, C, D) and the radio base station (30, B, C). (50, B,
18. The communication method for mobile communication according to claim 17, wherein the communication method operates to register the position information of (C, D) and to perform setting, cancellation, and change of the communication path based on the position information. 19. When the mobile radio device (50, B, C, D) transmits a calling signal, all the radio base stations (30, B, B) existing in the vicinity of receiving the calling signal satisfactorily. , C), together with the identification information of the mobile radio device (50, B, C, D), the identification information and the reception quality information of the radio base station (30, B, C) that has received this identification information, 18. The communication method of mobile communication according to claim 17, wherein the communication method operates to return a response to the mobile device (50, B, C, D). 20. When the mobile radio device (50, B, C, D) is communicating with a plurality of radio base stations (30, B, C) present in the vicinity, the mobile radio device (50, B, C, D) of the service area has In the area covered by the wireless base station, when communication traffic fluctuates, the number of wireless base stations participating in the communication is changed in consideration of a priority given to a predetermined communication type. 18. The communication method of mobile communication according to claim 17, wherein one of the mobile radio device and the communicating radio base station operates. 21. When the mobile radio device (50, B, C, D) is communicating with a plurality of radio base stations present in the vicinity and radio wave propagation characteristics change and communication quality is affected, Either the mobile radio device or the communicating radio base station operates so as to maintain the communication quality at or above a required level by changing the number of the radio base stations (30, B, C) to communicate with. 18. The communication method for mobile communication according to claim 17, wherein: 22. While the mobile radio device (50, B, C, D) is communicating with a plurality of radio base stations (30, B, C) present in the vicinity, the mobile radio device (50, B, C, D) communicates with one of the radio base stations. When the communication quality of the communication path becomes lower than or equal to a predetermined level, the communication path is released, and a new communication path is established between the communication path and a radio base station that can secure communication quality satisfying the predetermined level. 18. The communication method for mobile communication according to claim 17, wherein one of the mobile radio device and the communicating radio base station operates so as to provide a communication path. 23. Receiving signals received by the plurality of radio base stations while the mobile radio device (50, B, C, D) is communicating with a plurality of radio base stations (30, B, C) existing in the vicinity. Detecting the traveling direction and speed of the mobile radio device based on the change in reception quality including the electric field, estimating the destination, investigating the communication traffic situation of the radio base station at the destination, and detecting the mobile According to the type of communication of the other mobile radio device communicating with the previous radio base station, the mobile radio device and the mobile communication device during the communication so as to reduce the number of radio base stations communicating with the other mobile radio device. 18. The communication method for mobile communication according to claim 17, wherein one of the wireless base stations operates. 24. Receiving signals received by a plurality of radio base stations (30, B, C) while the mobile radio devices (50, B, C, D) are communicating with a plurality of radio base stations (30, B, C) present in the vicinity. By detecting the traveling direction and speed of the mobile radio device based on a change in reception quality including the electric field, when switching channels during communication, a predetermined communication quality among radio channels owned by the radio base station in the traveling direction is determined. 18. The communication method for mobile communication according to claim 17, wherein the communication method operates to preferentially allocate a wireless channel that can be secured. 25. The mobile radio device according to a change in communication quality including a reception electric field received by a plurality of radio base stations (30, B, C) communicating with the mobile radio device (50, B, C, D). 18. The communication method of mobile communication according to claim 17, wherein one of the mobile radio device and the communicating radio base station operates to detect a traveling direction, a speed, and a position of the mobile communication device. 26. At least one of the mobile radio device (50, B, C) and the plurality of communicating radio base stations (30, B, C) has a transmission frequency corresponding to a plurality of radio channels. 18. The communication method for mobile communication according to claim 17, wherein the communication method operates to transmit a plurality of wireless channels in parallel by repeatedly switching. 27. At least one of said mobile radio device (50, B, C, D) and said plurality of communicating radio base stations (30B, C) receives reception frequencies corresponding to a plurality of radio channels. 18. The communication method for mobile communication according to claim 17, wherein the communication method operates to receive a plurality of wireless channels in parallel by repeatedly switching. 28. When the mobile radio equipment (50, B, C, D) is present in a zone where communication traffic is congested, the mobile radio equipment further increases the congestion state as a communication partner of the mobile radio equipment. Communication with the radio base station (30, B, C) to be enhanced is not permitted, and communication is performed with the radio base station (30, B, C) that can secure a predetermined communication quality among the other radio base stations (30, B, C). 18. The communication method for mobile communication according to claim 17, wherein at least one of said mobile radio device and said communicating radio base station operates to allocate a radio channel. 29. At least one of the plurality of radio base stations (30B, C) communicating with the mobile radio device (50, B, C, D) has n transmitters, If communication over n channels becomes necessary due to the increase in communication traffic,
In at least one of the n transmitters, the transmission frequencies corresponding to the plurality of radio channels are repeatedly switched at a speed sufficiently higher than the frequency of the communication signal, so that a plurality of radio 18. The communication method for mobile communication according to claim 17, wherein the communication method is operable to transmit a channel. 30. At least one of a plurality of radio base stations (30B, C) communicating with said mobile radio device (50, B, C, D) has n receivers. If the traffic increase requires more than n channels of communication,
In at least one of the n receivers, the reception frequencies corresponding to the plurality of radio channels are repeatedly switched at a speed sufficiently higher than the frequency of the communication signal, so that a plurality of 18. The communication method for mobile communication according to claim 17, wherein the communication method is operated to receive a wireless channel. 31. Between each radio base means which covers a plurality of zones to form a service area, and at least one radio base means (30, B, C) existing in the service area. Mobile radio means (50, B, C, D) having radio transmission / reception means (66, 68) for transmitting and receiving diversity signals using at least one radio channel with the same contents, and the mobile radio means Identification of the mobile radio means and the radio base means on the basis of the communication quality between the at least one radio base means and the mobile radio means, having received the location registration signal from the mobile radio means in a good condition not less than a predetermined communication quality. Identification information registration means (24) for registering information, and release of communication channel setting based on the identification information;
Includes a gateway exchange means (20) having communication path setting means (21,23) for enabling diversity transmission / reception by adding a communication path to a newly communicable radio base means and connecting to a general telephone network. A communication system for mobile communication, comprising: 32. The gateway exchange means (20) comprises: identification information of the radio base means (30, B, C) capable of communicating with the mobile radio means (50, B, C, D); ID identification storage means (24) for registering identification information of means, and communication between at least one of said radio base means (30, B, C) and said general telephone network or between said radio base means A switch group means (23) capable of setting and releasing a path, and the communication path is set in at least the switch group means (23) based on identification information registered in the ID identification storage means (24). 32. The communication system for mobile communication according to claim 31, further comprising: a communication path control means (21) for outputting a control signal for releasing. 33. The ID identification storage means (24), based on instructions from at least one of the mobile radio means (50, B, C, D) and the radio base station (30, B, C). The location information of the mobile radio means is registered, and the communication path control means (21)
33. The mobile communication system according to claim 32, wherein said communication path is set, released, and changed based on said position information. 34. The wireless base means (30), comprising: a wireless receiving means (48) including a receiving mixer for receiving a designated wireless channel; and receiving the designated wireless channel by the receiving mixer. Receiving synthesizer means (35) for applying a required frequency to the radio signal; radio transmitting means (46) including a transmission mixer for transmitting the designated radio channel; and the designated radio channel to the transmission mixer. Transmitting synthesizer means (36) for applying a frequency necessary to transmit the signal; reference frequency oscillating means (40) for supplying a reference frequency to the receiving synthesizer means and the transmitting synthesizer means; Communication quality monitoring means (37) for monitoring the communication quality of the signal being received by the wireless receiving means and outputting communication quality information; ID identification storage means (34) for storing the obtained identification information, and, based on the identification information stored in the ID identification storage means, indicating the wireless channel to be received by the reception synthesizer means. 32. The mobile communication system according to claim 31, further comprising control means (38) for instructing said transmission channel to be transmitted to said transmission synthesizer means. 35. A radio base station (30B, C) comprising: a reception base station for generating a frequency necessary for receiving i uplink radio channels satisfying 2 ≦ i ≦ n out of n uplink radio channels; A synthesizer means (35), and a reception channel for sequentially switching the output of the reception synthesizer means at a speed sufficiently higher than the frequency of the communication signal so that the i uplink radio channels can be received in parallel. A switching unit (44-1); a transmission synthesizer unit (36) for generating a frequency required for transmission of i downlink wireless channels satisfying 2 ≦ i ≦ n among the n downlink wireless channels; Transmission channel switching means for sequentially switching the output of the transmission synthesizer means at a speed sufficiently higher than the frequency of the communication signal so that the i downlink radio channels can be transmitted in parallel 44-2), a reference frequency oscillating means (40) for supplying a reference frequency to the receiving synthesizer means and the transmitting synthesizer means, and a frequency to be generated in the receiving synthesizer means and the transmitting synthesizer means. 32. The communication of mobile communication according to claim 31, comprising: control means (38B, C) for giving an instruction of (3), and giving an instruction of switching to said reception channel switching means and said transmission channel switching means. system. 36. The radio base means (30C) includes: an antenna sharing means (96); a plurality of transmitting / receiving means (90) each including a transmitter and a receiver connected to the antenna sharing means; A plurality of communication quality monitoring means (93) for monitoring communication quality, at least one control transmission / reception means (94) for transmitting / receiving a control signal, and the plurality of transmission / reception means and at least one 32. A control means (38C) for instructing the control transmission / reception means to instruct a radio channel to be transmitted / received, and instructing the plurality of communication quality monitoring means to instruct and control a radio channel to be monitored. A communication system for mobile communication according to claim 1. 37. A receiving synthesizer means (35) for generating a frequency necessary for receiving i uplink radio channels satisfying 2 ≦ i ≦ n out of n uplink radio channels. ) And reception channel switching means (44) for sequentially switching the output of the reception synthesizer means at a speed sufficiently higher than the frequency of the communication signal so that the i uplink radio channels can be received in parallel. -1); transmitting synthesizer means (36) for generating a frequency necessary for transmission of i downlink radio channels satisfying 2 ≦ i ≦ n out of the n downlink radio channels; Transmission channel switching means (44-2) for sequentially switching the output of the transmission synthesizer means at a speed sufficiently higher than the frequency of the communication signal so that the wireless channels can be transmitted in parallel; A control means (38C) for giving an instruction of a frequency to be generated to the reception synthesizer means and the transmission synthesizer means, and for giving a switching instruction to the reception channel switching means and the transmission channel switching means. The mobile communication system according to claim 36. 38. The control means (38, B, C) comprising: when the mobile radio means (50, B, C, D) transmits a call signal and receives the call signal satisfactorily, 36. The system according to claim 34, wherein the identification information of the own radio base unit which has received the identification information together with the identification information of the mobile radio means and the reception quality information are controlled to be returned to the mobile radio means. Item 39. The mobile communication system according to Item 36 or Item 37. 39. The control means (38, B, C), wherein the mobile radio device (50, B, C, D) includes:
During communication with C), if communication traffic fluctuates in an area covered by the own radio base station, whether to participate in the communication in consideration of a priority given to a predetermined communication type or not. 38. The mobile communication system according to claim 34, wherein the communication is controlled so as to determine the mobile communication. 40. When the control means (38, B, C) communicates with the mobile radio means (50, B, C, D), a radio wave propagation characteristic changes and the communication quality is affected. 34. The method according to claim 34, wherein when it is determined that it is difficult to maintain said communication quality at a required level or higher, said mobile radio means is controlled to request permission to stop communication.
Item 39. The communication system for mobile communication according to Item 35, Item 36, or Item 37. 41. When the communication quality of a communication path falls below a predetermined level during communication with the mobile radio means (50, B, C, D), The mobile station may cancel this communication path and provide a new communication path with the new radio base means (30, B, C) capable of newly securing communication quality satisfying the predetermined level. Claim 34 controlling to contact the wireless means.
Item 39. The communication system for mobile communication according to Item 35, Item 36, or Item 37. 42. The control means (38, B, C), wherein the mobile radio means (50, B, C, D) communicates with the mobile radio means (50, B, C, D) by a change in reception quality including a reception electric field to be received. , The direction of travel of the vehicle, the destination is estimated, and the communication traffic status of the other wireless base means (30, B, C) at the destination is investigated. Claims: Control is performed so as to stop communication with another wireless base means communicating with the other mobile wireless means depending on the type of communication of another mobile wireless means communicating with the wireless base means. Clause 34, 35, 36 or 37
A communication system for mobile communication according to claim 1. 43. The mobile radio means, wherein the control means (38, B, C) communicates with the mobile radio means (50, B, C, D) by a change in reception quality including a reception electric field to be received. When the channel is switched during communication by detecting the traveling direction and speed of the wireless base station, the wireless channel that can secure a predetermined communication quality among the wireless channels owned by the other wireless base means in the traveling direction has priority. 38. The mobile communication system according to claim 34, 35, 36, or 37, wherein said other wireless base means is contacted so as to be assigned to said mobile station. 44. The control means (38, B, C), the mobile radio means (50, B, C, D) of the mobile radio means by a change in communication quality including the received electric field received during communication with the mobile radio means (50, B, C, D) 39. The mobile communication system according to claim 34, 35, 36, or 37, which detects a traveling direction, a speed, and a position. 45. The control means (38B, C) switches a plurality of radio channels in parallel by repeatedly switching transmission frequencies corresponding to the plurality of radio channels at a speed sufficiently higher than the frequency of a communication signal. 38. The communication system for mobile communication according to claim 35, wherein the communication is controlled to be transmitted. 46. The control means (38B, C) switches a plurality of radio channels in parallel by repeatedly switching reception frequencies corresponding to the plurality of radio channels at a speed sufficiently higher than the frequency of a communication signal. 38. The mobile communication system according to claim 35, 36, or 37, wherein the communication is controlled so as to be received. 47. When the control means (38, B, C) is present in a zone where communication traffic is congested, a predetermined communication partner of the mobile radio means (50, B, C, D) is provided. Radio base means (30, B, C) that can ensure communication quality
38. The mobile communication system according to claim 34, wherein the mobile communication device is instructed to perform communication with the mobile communication device. 48. When the control means (38C) requires communication of more than the number of channels of said transmitting / receiving means due to an increase in communication traffic, at least one of said plurality of transmitters is provided. In the transmitter of
37. The apparatus according to claim 36, wherein the transmission frequency corresponding to the plurality of wireless channels is repeatedly switched at a speed sufficiently higher than the frequency of the communication signal to control the transmission of the plurality of wireless channels in parallel. A communication system for mobile communication according to claim 1. 49. When the control means (38C) requires communication of more than the number of channels of said transmitting / receiving means due to an increase in communication traffic, at least one of said plurality of receivers is provided. In the receiver of
37. The apparatus according to claim 36, wherein the reception frequencies corresponding to the plurality of wireless channels are repeatedly switched at a speed sufficiently higher than the frequency of the communication signal to control the reception of the plurality of wireless channels in parallel. A communication system for mobile communication according to claim 1. 50. A receiving synthesizer means (55) for generating a frequency necessary for receiving i radio channels satisfying 2 ≦ i ≦ n among the n radio channels. Receiving channel switching means (64-1) for sequentially switching the output of the receiving synthesizer means at a speed sufficiently higher than the frequency of the communication signal so that the i wireless channels can be received in parallel. Wireless receiving means (68) including a receiving mixer for receiving the i wireless channels by applying the output of the receiving synthesizer means via the receiving channel switching means.
Transmitting synthesizer means (56) for generating a frequency required for transmission of i wireless channels satisfying 2 ≦ i ≦ n among the n wireless channels; and transmitting the i wireless channels in parallel. Transmission channel switching means (64-2) for sequentially switching the output of the transmission synthesizer means at a speed sufficiently higher than the frequency of the communication signal so that transmission can be performed; and Wireless transmission means (66) including a transmission mixer applied through the transmission channel switching means for transmitting the i wireless channels;
A reference frequency oscillating means (71) for supplying a reference frequency to the transmitting synthesizer means and the receiving synthesizer means; and a communication quality monitoring means for monitoring communication quality received by the wireless receiving means. (57); an ID roam area collation storage means (54) for storing the identification information registered in the barrier exchange means; and A control means (58) for giving a switching instruction to the receiving channel switching means and the transmission channel switching means, and instructing the receiving synthesizer means and the transmitting synthesizer means of a frequency to be generated. 32. A communication system for mobile communication according to claim 31, wherein said communication system is a mobile communication system. 51. A receiving synthesizer means (55) for generating a frequency necessary for receiving i radio channels satisfying 2 ≦ i ≦ n out of n radio channels, wherein said mobile radio means (50B) comprises: Receiving channel switching means (64-1) for sequentially switching the output of the receiving synthesizer means at a speed sufficiently higher than the frequency of the communication signal so that the i wireless channels can be received in parallel. Wireless receiving means (68) including a receiving mixer for receiving the i wireless channels by applying the output of the receiving synthesizer means via the receiving channel switching means.
Transmitting synthesizer means (56) for generating a frequency required for transmission of i wireless channels satisfying 2 ≦ i ≦ n among the n wireless channels; and transmitting the i wireless channels in parallel. Transmission channel switching means (64-2) for sequentially switching the output of the transmission synthesizer means at a speed sufficiently higher than the frequency of the communication signal so that transmission can be performed; and Wireless transmission means (66) including a transmission mixer applied through the transmission channel switching means for transmitting the i wireless channels;
Measurement channel switching means (64-3) for sequentially switching the output of the receiving synthesizer means at a low speed so that the wireless channels to be received can be sequentially received; and the output of the receiving synthesizer means. C / N measurement receiving means (52) for applying the measurement signal through the measurement channel switching means, measuring the carrier-to-noise ratio of the i wireless channels, and outputting C / N data; ID roam area collation storage means (5) for storing the identification information registered in the barrier exchange means (20).
4) and collating the C / N data with the storage contents of the ID roam / area information collating and storing means and giving a switching instruction to the receiving channel switching means, the transmission channel switching means and the measurement channel switching means. 32. The mobile communication system according to claim 31, further comprising control means for instructing said receiving synthesizer means and said transmitting synthesizer means of a frequency to be generated. 52. A receiving synthesizer means (55) for generating said mobile radio means (50C) a frequency necessary for receiving i radio channels satisfying 2 ≦ i ≦ n out of n radio channels. Wireless receiving means (68) including a receiving mixer for receiving the i wireless channels by receiving the outputs of the receiving synthesizer means; and 2 ≦ i ≦ n among the n wireless channels. transmitting synthesizer means (56) for generating a frequency required for transmission of the i wireless channels, and an output of the transmitting synthesizer means so that the i wireless channels can be transmitted in parallel. Transmission channel switching means (64-2) for sequentially switching at a speed sufficiently higher than the frequency of the communication signal; and applying the output of the transmission synthesizer means via the transmission channel switching means. Is by wireless transmission means including a transmission mixer for transmitting said i pieces of radio channels (66)
A reference frequency oscillating unit (71) for supplying a reference frequency to the transmitting synthesizer unit and the receiving synthesizer unit; and a communication quality monitor for monitoring communication quality received by the i wireless receiving units. A communication quality monitoring means (57); a mixing means (69) for mixing communication signals from the wireless reception means having received the i wireless channels to obtain a mixed communication signal; and a gateway exchange means (20). ID roam area collation storage means (5) for storing the identification information registered in (5).
4) collating the storage contents of the ID roam / area information collating and storing means with the output of the communication quality monitoring means to give a switching instruction to the receiving channel switching means and the transmitting channel switching means, 32. The mobile communication system according to claim 31, comprising means and control means (58C) for instructing said transmitting synthesizer means of a frequency to be generated. 53. The communication area of the service area, wherein the control means (58, B, C) communicates with a plurality of wireless base means (30, B, C) present in the vicinity. In the area covered by the base means, when communication traffic fluctuates, control is performed such that the number of wireless base means participating in the communication is changed in consideration of a priority given to a predetermined communication type. 53. A mobile communication system according to claim 50, claim 51 or claim 52, wherein 54. The control means (58, B, C) changes radio wave propagation characteristics during communication with a plurality of wireless base means (30, B, C) present in the vicinity, affecting communication quality. 52. The method according to claim 50, wherein, when received, the number of said wireless base stations with which communication is performed is changed to control the communication quality to be maintained at a required level or more. A communication system for mobile communication according to claim 1. 55. While the control means (58, B, C) is communicating with a plurality of wireless base means (30, B, C) existing in the vicinity, communication between one of the wireless base means is performed. When the communication quality of the communication path falls below a predetermined level, the communication path is released and a new communication path is established between the base station and the radio base means capable of securing communication quality satisfying the predetermined level. 53. The communication system for mobile communication according to claim 50, wherein the communication is controlled so as to provide. 56. The control means (58, B, C), when communicating with a plurality of wireless base means (30, B, C) present in the vicinity, determines a reception electric field received by the plurality of wireless base stations. Replying to the information on the change in reception quality, including the direction of travel and speed of the own mobile radio means, estimating the destination, investigating the communication traffic situation of the radio base means at the destination, and entering the congestion state In some cases, control is performed so that the number of wireless base means communicating with the other mobile wireless means is reduced according to the type of communication of the other mobile wireless means communicating with the wireless base means at the destination. 53. A communication system for mobile communication according to claim 50, 51 or 52. 57. The control means (58, B, C), when communicating with a plurality of wireless base means (30, B, C) present in the vicinity, detects a reception electric field received by the plurality of wireless base means. Information about the change in reception quality, including the direction of travel and the speed of the own mobile radio means, and when switching channels during communication, a predetermined number of radio channels owned by the radio base means in the travel direction. 53. The mobile communication system according to claim 50, wherein control is performed such that a wireless channel capable of ensuring said communication quality is preferentially assigned. 58. The control means (58, B, C) returns information on a change in communication quality including a received electric field received by a plurality of communicating radio base means (30, B, C), 50. The control device according to claim 50, wherein the control unit controls to detect a traveling direction, a speed, and a position of the own mobile radio unit.
52. A communication system for mobile communication according to paragraph 51 or 52. 59. The control means (58, B, C) controls to transmit a plurality of radio channels in parallel by repeatedly switching transmission frequencies corresponding to a plurality of radio channels. Claim 50, No.
52. A mobile communication system according to paragraph 51 or 52. 60. The control means (58, B, C) controls to receive a plurality of radio channels in parallel by repeatedly switching reception frequencies corresponding to a plurality of radio channels. Claim 50, No.
52. A mobile communication system according to paragraph 51 or 52. 61. A radio base means for further enhancing the congestion state as a communication partner when the control means (58, B, C) exists in a zone in which communication traffic is congested. (30, B, C) is not permitted, and is controlled to select a radio channel so as to communicate with a radio base means capable of securing a predetermined communication quality among radio base means other than the above. 53. A communication system for mobile communication according to claim 50, 51 or 52.