JPH0225123A - Communication method for mobile communication and mobile radio equipment - Google Patents

Abstract

PURPOSE:To attain smooth communication with a radio base station to which the title equipment is located at carrying and with a broad band radio base station at on-vehicle by varying the transmission power of the radio equipment at carrying and at on-vehicle. CONSTITUTION:A mobile radio equipment 50 is connected to a mobile radio equipment side power supply B1 at carrying and connected to an automobile power supply B2 in the case of vehicle mount. Thus, the transmission power of the mobile radio equipment is set at carrying so as to be sent to radio base station 30-n in a zone to which the equipment is located. Moreover, the power is set so as to be sent to a broad band radio base means 17-i at carrying. Thus, smooth communication is attained with the radio base station or the broad band radio base station at carrying or at on-vehicle mount.

Description

[Detailed description of the invention] [Industrial application field] The present invention is directed to a mobile communication method and a mobile radio.

Roughly speaking, in mobile object communication 2 using a small zone configuration,
Before moving for mobile! l! ; Relates to a communication method and a mobile radio device that can consistently satisfy two quality conditions when one device is used in a car and the communication quality deteriorates due to movement.

More specifically, we will develop communication methods and transportation that have low battery consumption when carried in a mobile phone, and that have excellent frequency efficiency, communication quality, wireless line control ability, and position recording ability even when driving in a car at high speeds. Wireless is intended to provide.

[Prior art] Generally, when performing mobile communication within a wide service area, a method is used in which one wireless base station covers the entire area and communicates with mobile units within the V-bis area. This is called the large zone method. On the other hand, in the small zone system, the service area is divided into multiple small areas, one wireless base station is installed in each divided area, and the mobile radio in each area is The equipment communicates with these wireless base stations.

The conventional small zone system is employed, for example, in the car telephone system of NT King (Nippon Telegraph and Telephone Corporation), which is currently in commercial service. In this case, the mobile radio installed in the car moves away from the radio base station of the other party as the car moves, and for example, if the radio base station reaches more than 5 to 7 excitations, the input electric field value for receiving radio waves will decrease. This causes deterioration in call quality. Therefore, in a small zone configuration, within one novice area =! ! Base stations are installed 10 to 12 times apart from each other, so in the above case there is always another wireless base station near the current location of the car (within 5 to 6 KIf1), and this new wireless base station and mobile wireless The call continues using a different wireless channel.

In the NTT system, a radio line control station is installed to control a large number of radio base stations and mobile radios, and the radio line control station controls the setting and cancellation of calls on radio lines. It is connected to the general telephone network via the Nazu barrier switch. When a deterioration in call quality occurs, the radio network control station causes multiple radio base stations around the mobile radio to receive the radio waves transmitted by the mobile radio, and sends a specific one of these radio base stations to the mobile radio. When it is determined that the desired speech quality can be maintained by setting a new radio channel between the mobile radio and the radio base station, the mobile radio sets the new channel between the mobile radio and the radio base station.

FIG. 10 shows a conceptual diagram of the configuration of a conventional system that operates as described above, and the explanation will be explained using this diagram.

In FIG. 10, zones 14A, 14B, and 14C each having a radius of about 5 to 7 circles are surrounded by four circles.

Let us assume that 14D is one novice area for a car telephone, and that the mobile radio 15 mounted in the car is currently communicating with the radio base station 13A in zone 14A. Since the automobile is traveling from zone 14A to zone 14C, the relative distance between radio base station 13Δ and mobile radio 15 is increasing. Assuming that communication is continuing and the car has moved from zone 14A to zone 14C, the distance between radio base station 13A and mobile radio 15 is 5.
The input electric field value of mutually received radio waves decreases to a level 7 or higher, and the transmission quality drops below a certain level.

This state of quality deterioration is constantly monitored by the radio network control station 12, and when the quality drops below a certain standard, no warning is detected! -j! Wireless base stations 13B and 13 around the base station 13A
C and 13D are requested to measure the quality of the radio channel (assumed to be channel CH1) in use between radio base station 13A and mobile radio 15. The wireless base stations 13B, 13C and 13D that received this request,
Each has its own radio channel searching receiver (not shown)
It tunes to channel CH1 to receive the signal, and reports its status to radio network control station 12. Upon receiving this report, the radio network control station 12 transmits the information to the radio base stations 13B, 13C,
Compare the values of the received input electric fields FB=EC2 and E of 13D and Fo>EB.

If EC>FD and EC confirms that a certain level of quality is ensured from the perspective of transmission quality, the radio network control station 12 considers the transition from zone 14A to zone 14C, and A procedure for disconnecting the wireless channel CHI that was being used and instead using an unused channel (assuming channel CH10) among the wireless channels available at the wireless base station 13C in zone 14C, that is, a busy channel. Start switching.

The following is a reference: Furukawa et al. “Car telephone radio line control” Nippon Telegraph and Telephone Telecommunications Research Institute Research and Practical Application Report VO1, 26,
No. 7 This will be explained with reference to page 1885.

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

(2) A channel switching signal is sent to the mobile radio 15 from the radio base station 13A with which communication was previously performed, and a radio continuity test tone is sent from the radio base station 13C, which is currently communicating with the mobile radio. It is sent to the mobile radio device 15.

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

The above (1) to (3) are the channel switching methods currently used by NTT during a call, but as is clear from these explanations, the caller, i.e., the car phone user, is subject to the following noises: It will be mixed into the call. That is, (a) A control signal for switching according to (1) above (in this case, a 300 bit/sec digital signal) is inserted into the channel during the call after the other party's signal is disconnected. Since it appears in the output of the receiver, it is mixed into the call as an audible sound of about 300 Hz, and the call is interrupted during this time.

(b) During the call test described in (2) above, there is no noise, but there is no sound, and during this period, the other party's voice is not transmitted to you, and your own voice is not transmitted to the other party (call disconnection).

The duration of call interruption due to (a) and (b) above is 0.7
It is said to be ~0.8 seconds. On the other hand, the radio network control station 12
Then, the wireless base station 13C is connected to the mobile wireless device 15 via the transmission path 16C between the two, for example, on channel C1110.
to start a call. This instruction is also carried out at the same time as the continuity test described above, so from this moment on, the radio base station 13A ends communication with the mobile radio device 15, and instead, the radio base station 13C Open communication with 15! lf7. Furthermore, the radio network control station 12
An interface between the telephone network 10 and the gateway switch 1
9 is requested to switch the channel switch SW in the gateway exchange 19 for connecting each radio base station 13 to the telephone WJ 10 from the radio base station 13A to 13C.

That is, with the communication path switch SW in FIG. 10, the A-4 switch is turned off (indicated by a blank triangle), and the C-4 switch is turned on (indicated by a black triangle).

Through the above operations, a call can be continued using the mobile radio l115 in the car with any telephone within the telephone network 10, no matter where the car moves in zones 14A, 14B, or 140.140. .

In this way, the user (caller) is given a technical guarantee that he or she can make a call anytime and anywhere within the service area while the car is in motion. That service is good.

Mobile communications that employ such a small zone configuration have become able to exhibit the following features that are not found in large zone systems.

(a) Effective use of frequencies through a so-called small zone configuration, in which the radio waves from one wireless base station are used only in a narrow area, and many wireless base stations are placed in the service area and the same frequency is used repeatedly. became possible.

(b) With the advent of digital synthesizers, it has become possible to switch between hundreds of radio channels on mobile radios, and the radio Since the technology for setting and controlling lines has been established, it has become possible to contribute to the effective use of frequencies in (a).

(C) Efficiently handles many mobile radios, making and receiving calls, etc.
Since the radio line control technology necessary to set and control the radio line has been established in 3, this also contributed to the characteristics of item (a), and also contributed to the wireless channel during communication due to zone transition during communication of mobile radio equipment. Switching is also possible.

E Problems to be Solved by the Invention J However, in the conventional system as illustrated in Figure 10, technical measures are insufficient or no measures have been taken, causing inconvenience to users. There is a problem in that it is not possible to provide a satisfactory service, and the system needs to promote more effective use of frequencies and improve serviceability.

These problems will be explained below.

) In order to make effective use of frequencies, it is necessary to reduce the zone radius of one zone in a small zone configuration, but if this becomes too small, mobile radio equipment may
The probability of passing through one zone and transitioning to another increases. As a result, it is frequently necessary to change the wireless channel assigned to each zone when moving between zones, and at this time, both the wireless base station and the mobile radio have to change the old wireless channel to the new wireless channel. The need arises. Conventionally, this change was made by the radio network control station 12 (FIG. 10), but this change of channel caused a temporary interruption of communication, resulting in deterioration of communication quality.

ii) There was an example in which mobile VJ radios with different transmission powers were introduced into the same system and operated as devices within one system. This includes, for example, a mobile radio installed in a car (in the case of NTT's car phone, the transmission output is 5W) and a mobile phone that the user can carry outdoors and accesses a wireless base station for the car phone ( In the case of NTT, the transmission output (1W) is housed in the same system,
Since the wireless equipment housed in the wireless base station can be shared, it is possible to construct an economical system.

However, from the perspective of effective frequency use, the complexity of creating rules for reusing the same frequency16 tends to reduce the effectiveness of effective use, and the difference in transmission power levels This increases the possibility of interference caused by mobile radio equipment in the country. In order to prevent this, the cost would increase to 1 and the effective use of frequency would be impaired.

Reuse of the same frequency can be dealt with by increasing the control capability, but there are 5 limitations to this.
If the small zoning progresses beyond a certain point, it may become uncontrollable.
This results in a system that is not cost-effective at all.

Interference has not been solved by conventional methods and has been a major problem in conventional systems.

Therefore, from the standpoint of effective use of frequencies, there is a limit to the effective use of frequencies, and it has not been possible to meet the requirements in terms of utilization of limited radio wave resources.

iii) As the number of small zones progresses, there are many situations in which within a small zone served by one wireless base station, small zones served by an adjacent or the next adjacent wireless base station overlap, and conventional technology as a wireless line control technology There was a possibility of loss of control when using

This means that within one small zone, the radio wave propagation 11ffl characteristics are greatly affected (propagation loss) due to the topography and the influence of dyed materials.
receive. This influence becomes relatively large as the number of zones becomes smaller in order to effectively utilize frequencies, and the range of one small zone becomes smaller (radius 1K11 or less).

In addition, a relatively high-level transmitter is used in front of the wireless chess station and mobile radio to ensure good communication even in areas affected by terrain and structures. This means that in a place where there is no influence from the terrain Ab structure, a remote radio base station and a mobile radio set in another zone can communicate with each other.

Therefore, the original concept that one small zone is managed by one wireless base station and that a wide plane that is the service area is covered by many small zones disappears, and many small zones are superimposed and one The decision was made to form a service area.

As a result, in order to smoothly operate a small zone system in such a state, with the conventional technology, it is necessary to frequently set up, change, and cancel the wireless communication path, which reduces the capability of the wireless line control device. The result will be significantly higher. Therefore, it is practically impossible to secure a smooth communication path, and consideration has been given to the system configuration in order to avoid such a situation.

V) As the size of the zone handled by one radio base station becomes smaller as the size of the zone becomes smaller, the frequency of location registration increases as mobile radios in a standby state move. In other words, location registration involves automatically sending a location registration signal from a mobile radio to a wireless base station when moving from a service area covered by one wireless base station to a zone covered by an adjacent wireless base station. However, as the moving speed increases or the size of the zone decreases, the frequency of this registration signal transmission increases. Therefore, the frequency of location registration traffic increases, but no effective countermeasures have been taken in conventional systems.

As mentioned in V) iv), as the size of the zone handled by one wireless base station becomes smaller as the size of the zone progresses, the frequency of location registration due to the movement of mobile wireless devices in standby mode will increase. To increase.

In this case, location registration is performed by automatically sending a location registration request signal from the mobile radio to the wireless base station when the mobile radio moves to a zone covered by an adjacent radio base station. However, it often happens that there is not only one but a plurality of wireless base stations that can receive this signal well.

Then, these multiple radio base stations will send response signals to the mobile radio at the same time unless special measures are taken. Since response signals from these plurality of radio base stations are simultaneously received by the mobile radio, interference occurs and accurate signal reproduction becomes impossible.

v+) During the channel switching during a call that is performed when a mobile radio moves, which will be described in detail later, a new signal is sent from the mobile radio to a nearby radio base station in order to determine the communication channel in the new radio zone. Quite often it occurs that there is not only one but a plurality of radio base stations responding to signals for determining the radio channel. Then, these plurality of radio base stations will send response signals to the mobile radio at the same time unless special measures are taken. Since response signals from these multiple radio base stations are received simultaneously by the mobile radio, interference occurs, and accurate signal reproduction is not performed, making channel switching impossible. happens.

vii) In mobile communication, the quality of communication changes greatly due to the influence of radio wave propagation characteristics as the mobile body moves, and in places where radio waves are poorly transmitted,
There were problems such as communication quality falling below the value required by the system. In order to solve this problem, 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 frequencies.

Furthermore, call interruptions due to transition between zones during a call are considered to be a type of communication quality problem, and a solution was needed to ensure quality.

viii) No measures were taken to deal with fluctuations in communication traffic within the system.

Communication traffic fluctuations within the system, for example, are usually extremely low in public communications late at night or early in the morning, during the day around 10 a.m. and between 2 to 3 p.m., and in automated telephones.
A large pile of traffic can be seen between 5 and 6 o'clock, but if the system is designed to function satisfactorily even during the peak traffic hours, the system components will be idle during off-peak hours, resulting in high costs. If a system was constructed that was suitable for off-peak hours, the cost would be extremely low, but it would become unusable during peak hours, and serviceability would suffer.

In addition, when communication traffic is slow, idle facilities within the system are effectively utilized to provide high-quality communication services, and as traffic increases, the system's component facilities are transferred to regular services. They lacked the concept of effective use. One reason for this is considered to be that the system cost would rise sharply if attempts were made to solve this problem using conventional techniques.

Furthermore, when all the transceivers of a base station are in use, for example, the equipment consisting of mobile radios cannot process even extremely short and regular signals such as a green signal, which conventional systems cannot handle. This was a technical constraint on the progress of small zoning.

ix) Conventionally, the location registration of mobile units communicating was done by registering and processing only the data received at one wireless base station at the same time. In systems that are subject to frequent changes, or in systems where there are restrictions on the location registration method due to the effective use of frequencies, it may be impossible to receive a call to a mobile unit due to a defect in location registration.

This means that if the wireless transceiver installed at the wireless base station has only one channel, it must be used for control and communication in a time-sharing manner, and when communicating with a mobile wireless device, it must be used in the same zone. There was a significant negative impact when there was a location registration request from another mobile radio.

×) The technology for providing mobile communication services using wideband signals was insufficiently mature and incomplete, causing inconvenience to users.

Conventionally, the mobile communication services that have been widely used have mainly been telephone, and those that use wide frequency bands, such as high-speed data signals, have rarely been used. This is because in mobile communication, the radio wave propagation characteristics change significantly as the mobile body moves, so there has been a lack of technology to properly receive wideband signals.

xi) Wireless line control ability and reliability were insufficient.

Conventionally, wireless line settings, cancellations, and channel switching during a call were performed by a wireless line control station or wireless system control device that was installed to centralize control in one area within a certain area. Ta.

Although this is effective in terms of unified management of line control through centralization, if a failure occurs in this system, the entire system will go down, resulting in a fatal accident. Therefore, countermeasures such as duplication of hardware have been taken, but these have led to increased costs and have not produced satisfactory results.

xii) In conventional land-based mobile communications, it has not been possible to estimate the direction of movement of a mobile object during communication due to technical difficulties, except in special cases. Therefore, it was not possible to obtain effective information such as the wireless line traffic situation in the area in the direction of movement, and problems remained in terms of effective frequency use and traffic management.

xiii) Momentary interruptions occur when switching channels during calls between zones or within a zone, and this has also been a major hindrance to creating smaller zones.

In the call channel switching method implemented by NTT, which was explained using FIG. The disadvantage is that part of the signal (300 bits/second) is mixed in and is unpleasant to the ears. If there is a temporary interruption in the call line or noise, it is not a big problem because it can be compensated for by listening again when the content of the call is voice, but it is not a big problem. When a facsimile terminal is installed and used for sending and receiving, if the channel is changed during operation, for example, for a 1-minute facsimile, the 0.8/60 part of the page will appear as a black line (or white line), which will affect the received image quality. The disadvantage was that it deteriorated significantly. In the case of data communications, for example, in a 1200 baud data signal, approximately 1000 bits of the signal are lost, requiring procedures such as retransmission.

In order to remove the annoying noise, there are methods such as silencing the channel while changing channels or using out-of-band signals, but although the purpose of removing the annoying noise can be achieved, it will reduce the amount of time the line is disconnected. still exists, so the problem remained that it was completely ineffective in eliminating the negative effects on facsimile and data signals.

xiv) Mobile phones for use while being carried by people cannot increase their transmission output due to battery capacity limitations, and are therefore used in systems with extremely small zone (microcell) configurations. However, if this mobile radio device is brought into a car and used while driving, the transmission quality of control signals deteriorates due to radio wave propagation characteristics, etc., and the problem remains that it cannot be used satisfactorily.

[Means for Solving the Problems] A plurality of radio base stations including a radio transceiver and an ID identification storage unit, a group of switches connecting the plurality of radio base stations and a telephone network, and a call path control for controlling the group of switches. A barrier switching device including an ID identification storage unit and an ID identification storage unit receives a plurality of channels at the same time in order to simultaneously communicate with a plurality of radio base stations while moving within a service area covered by the plurality of radio base stations! Ij! A mobile device that includes a receiving circuit and a wireless transmitting circuit that transmits multiple channels simultaneously, and when installed in a vehicle, obtains power from the vehicle and enables a significant increase in transmission power, thereby enabling communication with wide area wireless base stations. It was configured to include a radio device.

Roughly speaking, when it is necessary to strengthen communication functions from mobile MI devices that are moving at high speed, it is necessary to transmit control and call signals that cover the entire service area covered by multiple wireless base stations. A wide-area wireless base station for transmission and reception was installed, and a transmission line was used to connect this to the barrier switch.

[Operation] While multiple radio base stations and mobile S-line devices are communicating the same communication content in parallel using multiple channels,
If a channel (old channel) whose communication quality falls below a certain value occurs, another channel that satisfies the certain communication quality
Communication with one wireless base station is switched to another channel (new channel), communication on the old channel is terminated, and the same communication content can be communicated without momentary interruption using a small number of channels including the new channel. I made it. As a result, the following actions and effects could be obtained.

i) Each no Ij! The reliability of location registration has been improved because the base station and barrier switch are each provided with an ID identification storage unit, and the location of the mobile radio device is registered in parallel based on the data of each radio base station.

ii) When executing i) above, the mobile radio transmits a location registration request signal to the radio base station, but as a radio base station that can receive this signal well, 1
It occurs quite often that there is not just one, but multiple. Then, these multiple radio base stations will send response signals to the mobile radio at the same time unless special measures are taken. Since response signals from these plurality of radio base stations are received simultaneously by the mobile wireless device, interference occurs and accurate signal reproduction becomes impossible. In order to prevent this, in order to prevent interference in response signals in location registration signals transmitted to multiple wireless base stations in the vicinity, we have developed a method for transmitting response signals from multiple wireless base stations. , it was decided to take measures in advance, such as providing a time difference proportional to the received electric field value.

iii) Communication quality deteriorated in multiple channels 1
Since the channel is switched to a new channel, channel switching during a call between zones or within a zone can be done without any interruption.

iv) When performing 111) above, respond to a signal for determining a new front channel transmitted from a mobile radio to a nearby wireless base station for determining a communication channel in a new front zone. The presence of not just one wireless base station but a plurality of wireless base stations occurs quite frequently. Then, these plurality of radio base stations will send response signals to the mobile radio at the same time unless special measures are taken. Since the response signals from these multiple radio base stations are received simultaneously by the mobile radio, interference may occur and accurate signal reproduction may not be possible, making channel switching impossible. happen. In order to prevent this, when the quality of communication with one or more wireless base stations deteriorates, one or more other wireless base stations that meet a certain level of communication quality required by the system are set up. In order to prevent interference from occurring in a response signal to a signal for determining a new radio channel transmitted from the mobile radio device to a nearby radio base station in order to set up a communication path with We decided to include in advance the method for sending response signals from multiple wireless base stations.

V) The use of economical transmitting and receiving diversity ensures good communication quality, reduces interference, and makes new services using broadband signals technically possible.

vi) When traffic is slow, many channels are used for parallel communication, which makes effective use of radio equipment and improves communication quality.

vii) Since each wireless base station is equipped with an ID identification storage unit and a function that enables simultaneous transmission and reception of multiple wireless channels through high-speed switching, it is possible to process location registration signals from mobile wireless devices even during peak traffic times. It became.

viii) Parallel communication of multiple channels improves the transmission characteristics of broadband signals, resulting in improved line quality.

In addition, it is possible to significantly increase the transmission output of a mobile radio when it is installed in a vehicle compared to when it is carried, and it is possible to improve the functionality and install a radio base station (wide area radio base station) for transmitting and receiving control signals and call signals, and to By using it in combination with the drug, I was able to achieve roughly the following actions and effects.

ix) It has become possible to estimate the direction and speed of movement of a mobile radio, and it has become possible to ensure communication in the destination zone and to carry out advance allocation of channels to be used in the movement prospect zone; When the moving speed exceeds a certain value, the transmission output is increased to limit the transmission of location registration signals to wide area wireless base stations, thereby preventing control signal traffic from widening.
This makes it possible to ensure the reliability of control signals.

xi) Regarding incoming calls to mobile radios in the above state It was possible to secure communication by sending and receiving.

xii) Regarding the call originating from a mobile radio with increased transmission power in state By selecting base stations and communication channels, we were able to secure communications.

xiii) In xiii) above, the r! By including the necessary information for A, the operation of the system as a whole became smoother.

xiv) By distributing the functions of radio line control from the centralized system as in conventional systems to mobile radios or radio base stations, improved control processing capacity and system reliability have been achieved.

[Embodiment] FIG. 1A-1, FIG. 1A-2, and FIG. 1A-3 are configuration diagrams for explaining an embodiment of the present invention.

In FIG. 1A-1, 10 is a general telephone network, which includes an exchange 11 for general telephones. Reference numeral 20 denotes a gateway exchange for connecting the general telephone exchange 11 included in the telephone network 10 and the wireless system. Checkpoint exchange B! 20 is a plurality of wireless base stations 30-1.3
0-2. ..., 30-n, wide area wireless base station 17-1
．． 17-2. . . 17-1 and many mobile radios and telephones accommodated in the general telephone network 10, and transmits control signals between each of the radio base stations 30-1 to 3Q-n. In addition to transmitting and receiving, communication path settings are canceled and wide area wireless base stations 17-1, 17-2. ..., 17-
a communication path control unit 21 that controls i, etc., and a communication path control unit 21 that controls
A group of switches 23 necessary for switching communication paths for establishing connections between each of the radio base stations 30-1 to 30-n and the barrier exchange 20 and the exchange 11 under the control of the switch 23 are included.

FIG. 1A-2 shows a conceptual configuration diagram when a mobile radio a50, which is a mobile phone, is connected to the power source of a car, and the mobile radio device 50 is connected to the power source of the car by a power cord having plugs P at both ends. .

FIG. 1A-3 shows a circuit diagram of one embodiment of the power supply of FIG. 18-2, in which a power cord having a plug P at both ends connects a jack J connected to a car battery B2 and a mobile radio. Connect it to jack J on the machine 50 side. Here, B1
is a built-in battery when the mobile radio device 50 is used as a mobile phone, and a switch SW for switching the 2-way power supply.
/'fib side, battery B1 is mobile radio 1!
It was taken out as a power supply for 150, and the switch 5Wtfia
If it is on the side, power for the mobile radio 1150 is taken out from the battery B2 via the resistor R1 for overcurrent protection.

When the car battery B2 is connected to the mobile radio 50, the power sensor SE detects it and sends a detection signal to the control unit 58 of the mobile radio 50.

Upon receiving this detection signal, the control unit 58 sends a switching signal to the switch SW for switching the 2WAY power supply, and switches the switch SW.
is connected to side a, and at the same time is controlled so that the transmission output can be increased to a predetermined value.

Naturally, this switch sw may be switched by a direct instruction from the power sensor SE, or by a direct instruction from the power sensor SE.
A relay switch connected to the source sensor +jSE and the switch 5W8- may also be used. Further, as the power source sensor, either a mechanical sensor or a semiconductor switch connected to the battery B2 to detect a predetermined voltage can be used.

Figure 1B1. :C, t, each wireless base station 30-1.30-
2 or wide area wireless base station 17-1.17-2°...
The 19I aircraft 50 before moving is shown communicating with the 17-i. The received signal received by the antenna section enters a radio receiving circuit 68 that includes a receiving mixer 63 and a receiving section 53.
The communication signal that is the output is sent to the control section 58 and the telephone section 59.
is input. The communication signal output from the telephone section 59 is sent to the wireless transmission circuit 6 including the transmission mixer 61 and the transmission section 51.
6, and the transmission signal is sent out from the antenna section,
It is received by the radio base station 30 or the wide area radio base station 17.

In addition, the call quality during communication is constantly monitored by I15, and if it has deteriorated, it is reported to the control unit 58, and transmission is made from the same radio base r:i:J30 or wide area radio base station 17 with a time difference. The results of comparing and measuring the electric field values of the received signals are reported to the L control section 58. Communication quality monitoring unit 57,
An interference detector 62 that monitors the presence or absence of interference during communication and reports it to the control unit 58 when a certain amount of interference or more is detected, and the ID of the own mobile radio device 50.
record the information, identify which zone you are in,
ID/Roam/Area information collation storage unit 54 also stores
is provided with the wiring connections V-j as shown.

This mobile radio 1M50 has a synthesizer 55-
1.55-2. ...15J' and 56-1.5
6-2. . . , 56-n, and the selector switch 64-1.
64-2, a reception switching controller 65C and a transmission switching controller 67G that generate signals for switching and controlling the changeover switches 64-1 and 64-2, respectively. ~55-n and 56-1~5
5-n and the controllers 65G and 67C for both cutting tables are controlled by a control section 58. Each synthesizer 55
A reference frequency is supplied from a reference crystal oscillator 71 to -1 to 55-n and 56-1 to 56-n.

The control unit 58 is provided with a signal line to the switch SW for switching the 2-way power source shown in FIG. 1A-3, and a signal line to the power sensor SE'h1 for detecting switching of the 2-way power source.

When detecting that the 2WAY power source has been switched to the battery B2 side of the car, the control unit 58 sends a control signal to the wireless transmission circuit 66.
The signal can then be sent to the synthesizer 56 and controlled to increase the transmission power on the channel for the wide area wireless base station 17 to enable communication with the wide area wireless base station 17.

This 2WAY power supply is suitable for mobile phones (normal transmission power is 10
When connected to a car's power supply, the output power can be on the same level as a car phone (transmission output is 1 to 10 W).

FIG. 1A-4 shows a circuit configuration in which the transmission output is greatly increased, and the transmission output is insufficient only by increasing the transmission output of the radio transmission circuit 66. 50 cannot communicate with the wide area wireless base station 17, the output of the transmission mixer 61 is further amplified by the transmission amplifier 77, and the transmission output changeover switch 79 switches between the output of the transmission mixer 61 and the output of the transmission amplifier 77. This allows the antenna to be supplied to the antenna section. Control 2I1 part 58 is white from power sensor SE! When the control unit 58 detects that the power source of the mobile radio R50 is connected to the battery B2 of Vl width and determines that it is necessary to significantly increase the transmission output, the transmission power is increased via the transmission amplifier controller 78. By switching the transmission output selector switch 79 from the 961 side to the transmission amplifier 77 side and operating the transmission amplifier 77, it becomes possible to communicate with the wide area wireless base station 17 with a large transmission output. At the same time, the wireless channel is also wide area wireless base station 1.
The channel is changed to communicate with 7.

Here, a case has been described in which the transmission amplifier 77, the transmission amplification controller 78, and the transmission output selector switch 79 are integrated into the mobile radio 50, but these transmission amplifiers 77
, the transmission amplification controller 7B, and the transmission output cut-off switch 79 may be integrated with the antenna section of the automobile, so that when the mobile phone is installed in the automobile, the connection is made and the cellular phone becomes operational.

FIG. 1C shows a radio base station 30 (for example, 30-1>) that communicates with the mobile radio device 50, which has almost the same configuration as the mobile radio device 50 shown in FIG. 1B, but has a different configuration. The controllers 55-1 to 55-1 for switching between transmission and reception are
55-n, 56-1 to 56-n, there is no selector switch 64-1, 64-2 for switching the synthesizer, and I
D. There is no ROHM area information collation storage unit 54 (Fig. 1B), and the synthesizer is also used for reception and transmission 35-1.36
-1 each, and a 1D identification storage unit 3 for identifying and storing ID numbers of the self and the called party.
4, there is no telephone section 59 (FIG. 1B), and an interface 39 to the barrier exchange 1m20, which takes the place of the telephone section 59, is provided.

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

Transmitting unit 31 (51) Receiving unit 33 (53>Synthesizer 35-1 (55-1 to 55-n) Synthesizer 36-1 (56-1 to 56-n) Communication quality monitoring unit 37
(57> Control unit 3B (58> Reference crystal oscillator 40 (71) Transmission MIG 4 node 41 (61) Interference and disturbance detection 2S42 (62) Reception mixer 43 (63) Radio transmission circuit 46 (66) Radio reception circuit 48 ( 68) However, the control unit 38 does not include a signal line from the power supply sensor S[ and a signal line to the switch SW for switching the 2-way power supply because it is unnecessary.

FIG. 1D shows a wide area radio base station, for example 17-1, which transmits and receives control signals and communication signals to and from a mobile radio [50]
An example of this is shown. Here, the control signal interface 152 interfaces the control signal from the barrier exchanger 20 and applies the control signal to the angle modulator 154-1, and the angle-modulated control signal is applied to the transmitting microphone 9156-1. , a local valve from the local excavator 155-1 (mixed with the original signal, amplified by the transmission power amplifier 158-1, and sent from the antenna to the mobile radio 150 via an isolator (not shown). Sent out.

The upstream control signal from the mobile radio device 50 is received from the antenna via an isolator (not shown) to the reception mixer 161-1, where it is mixed with the local oscillation signal from the local valve (radiator 155-1). The received signal is demodulated by the demodulator 162 - 1 , added to the control signal interface 152 , and sent to the barrier switch 20 .

The communication signal interface 153 interfaces communication (talk) signals from the barrier exchange 20 to the angle modulator 15.
A communication (speech) signal is applied to 4-2, 154-3, and the angle-modulated communication (speech) signal is sent to transmission mixer 156-2, 156-2, 154-3.
56-3, local oscillators 155-2, 155
-3 and is mixed with the local oscillator signal from transmitter power amplifier 1.
58-2 and 158-3, and are sent from the antenna to the mobile radio device 50, which is moving at high speed, via an isolator (not shown).

The uplink communication (speech) signal from the mobile radio device 50 is received from the antenna via an isolator (not shown) to the reception mixer 161-2.161-3, and then sent from the local oscillator 155-2.155-3. It is mixed with the local oscillation signal of , demodulated by demodulation sections 162-2 and 162-3, applied to communication signal interface 153, and sent to barrier exchange 20.

The control unit 151 receives instructions from the barrier exchange 120 and instructs the local oscillators 155-1 to 155-3 to specify oscillation frequencies.

FIG. 1E shows no communication between mobile radio VS50! S
An example 30B of a base station 30 (for example, 30-1) is shown, and has almost the same configuration as the mobile radio 50 shown in FIG. 1B, except for the ID, roam, and area information. It does not have a verification storage section 54 (FIG. 1B), has an ID identification storage section 34 for identifying and storing ID numbers of itself and the called party, and does not have a telephone section 59 (FIG. 1B). An interface 39 to an alternative barrier exchange 820 is provided.

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

Transmitter 31 (51) Receiver 33 (53) Synthesizer 1 sizer 35-1 to 35-n (55-1 to 55-n> Synthesizer 36-1 to 36-n (56-1 to 56-n> Communication quality) Monitoring section 37 (57) Control section 38B (58) Reference crystal oscillator 40 (71) Transmission mixer 41 (61) Interference detector 42 (62) Reception mixer 43 (63) Radio transmission circuit 46 (66) Radio reception circuit 4B (68) However, the control unit 38B does not include the signal line J3 from the power supply sensor 9SE and the signal line to the switch SW for switching the 2-way power supply because it is unnecessary.

FIG. 1F shows an embodiment of the wireless base station 30 and the connection relationship between the gateway exchange 20 and the wide area wireless base stations 17-1 to 17-.
C is the antenna sharing g device 96 and the radio base station control device 32
Transceiver/receiver 90-1 to 9 for many telephone calls sharing
0-m, m communication quality monitoring receivers 93-1 to 93-m having both the functions of the radio receiving circuit 48 and the communication quality monitoring unit 37 shown in FIG. 1E, and a control channel for control signals. A dedicated control transceiver 94 is shown and is connected to the telephone network 10 via the barrier switch 20.

The configuration of one transmitter/receiver 1190 of the transmitters/receivers 190-1 to 90-m used in FIG. 1F is shown in FIG. The connection relationship between the control unit 38C1, the interface 39G with the barrier exchange 20, and the reference crystal oscillator 40C is shown.

The transceiver 90 shown in FIG. 1G has almost the same configuration as the wireless base 830B shown in FIG. The interface 39C and reference crystal oscillator 40C are shared.

Since the transmitter/receivers 90-1 to 90-m shown in FIG. 1F have such a configuration, the changeover switch 44-1
．． By 44-2, Sincerely Isa 35-1 to 35-n
and each specific one on the back of 36-1 to 36-n.
If one synthesizer is selected, the wireless base station 30C shown in FIG. 1F can transmit and receive m channels simultaneously.

Also, a changeover switch 44-1 of the transmitter/receiver 90.

44-2 and synthesizers 35-1 to 35-
If n 73 and 36-1 to 36-n are jumped at high speed and switched repeatedly, it is possible to transmit and receive signals for n channels at the same time using one transmitting/receiving fi 90. Therefore, the maximum m
Xn channels can be transmitted and received simultaneously.

Another embodiment of the mobile radio 50 is shown in FIG. 11-1.

The difference between the mobile radio device 50B shown in FIG. 1F-1 and the mobile radio device 50 shown in FIG.
and a receiving section 52 for C/N measurement.
3 and 73, the sincerei 'J' 55-1 to 55-
The output of the synthesizers 56-1 to 56-r) is applied to the transmitter Miku+J61 via the changeover switch 64-2 controlled by the transmitter switching controller 67C. .

The mobile radio device 50B shown in FIG. 1H has a function that has a particularly remarkable reception diversity effect.

A part of the received signal received by the antenna section of the mobile radio device 50B is added to the reception mixer 73. Receive mixer 7
The outputs from the synthesizers 55-1 to 55-n are applied as local oscillation frequencies to the synthesizers 55-1 to 55-n via the selector switch 64-3.

This changeover switch 64-3 is different from other changeover switches 64-
It is not necessary to switch at a high speed such as 1 or 64-2, and a low switching speed of, for example, 10)-12 is sufficient. l; 7J change switch 64-3 is synthesizer 55-1
When the output of
The C/N value of channel CH1 measured in step 2 (the value of the lIEt transmission to anyone's sound ratio) is transmitted to the control unit 58B. Next, when the selector switch 64-3 is in a position to obtain the output of the synthesizer 55-2, the C/N value of the channel CH2 is measured. In the following order, when the synthesizer 55-n is in a position where the output is turned on, the C/N value of Cl-In is measured and transmitted to the control unit 58B. The control unit 58B uses these values to set the switching frequencies of the reception switching controller 65C and the transmission switching controller 67C, for example, to C/C.
It is controlled to operate at a speed inversely proportional to the N value.

Here, the fact that the mobile radio device 50B has the functions explained in FIG. 1A-2, FIG. 1Δ-3, and FIG. 1A-4 means that
This is similar to the case of the mobile radio device 50 shown in the figure.

Next, a system for increasing the reception diversity effect will be briefly described. FIG. 11 shows an example of the configuration of the mobile radio device 50C in this case.

In FIG. 11, the input radio wave (input signal) to the mobile radio device 50C is divided into n equal parts at the antenna input section, and each radio wave is divided into n equal parts by the radio receiving circuits 68-1, 68-2, . ... Arrive at 68-n. In each of the radio receiving circuits 68-1 to 68-n, the receiving microphone +J63-1.63-2. ..., 63-n, receiving sections 53-1. 55-2. ..., 55
The local oscillation frequency from n is input. Therefore, in the configuration shown in the same figure, there is no reception selector switch 64-1 shown in FIG.
, CI 2°..., it is possible to receive the signals of CHn and transmit them back to AV. In addition, these receiving sections 53-1 to 53-
A part of the output signal of n is sent to the control unit 58C, and another part is added to the mixing circuit 69 and processed in the same way as in a normal diversity receiver (in this case, synthesis after detection). It is sent to the telephone section 59. In addition, each receiving section 53-1
A part of the outputs of ~53-n are sent to the communication quality monitoring unit 5, respectively.
7-1 to 57r), and their outputs are applied to the control unit 58C, respectively.

FIG. 1J shows a pre-move PJ device 50D that is different from the mobile radio device 50C shown in FIG. 5
Wireless transmission circuits 66-1 to 66- including 1-1 to 51-n
A synthesizer is provided with a signal to be transmitted to each of the transmitting units 51-1 to 51-n, which is connected in common and applied thereto, and which is controlled by the control unit 58D to generate a designated frequency. The outputs from 56-1 to 56-n are applied to each transmission mixer 61-1 to 61-n.This mobile radio device 50D has multiple radio channels like the mobile radio device 50C (FIG. 11). can be continuously transmitted without chopping using the changeover switch 64-2.

By adopting a circuit configuration as shown in FIG. 11 and FIG. 1J, it is possible to obtain a large diversity effect.

Here, mobile radios 50C and 50D (FIGS. 11 and 1J) are shown in FIGS. 1A-2 and 1-3.

Having the functions described in FIGS. 1A-4 is similar to that of the mobile radio device 50 in FIG. 1B.

1 and 1L show embodiments of other radio base stations 30D and 30E, and FIGS. 1M and 1N show embodiments of other radio base stations 30D and 30E.
Other embodiments of the transmitter/receivers 90-1 to 90-m used in Fig. F, 90B and 90C, are shown.

First, the radio base station 30D and the transceiver 90B shown in FIGS.
Similarly, each independent synthesizer 35-1 to 35
-n, reception mixers 43-1 to 43-n, and reception section 3
Wireless receiving circuits 48-1 to 48- including 3-1 to 33-n
The radio base station 30B shown in FIG.
The configuration is the same as that of the transmitter/receiver 1J190 shown in FIG. 1G. These mless base stations 30D and transmitting/receiving 1!9
By using the radio base station 30C using 0B, it is possible to expect a diversity effect when receiving a control signal in a high-speed movement mode, which will be described later.

The wireless base station 30E and transceiver 90C shown in FIGS. 1L and 1N are similar to the mobile radio device 50 shown in FIG. 1J.
Similarly to D, in addition to the receiving side, there are independent synthesizers 36-1 to 36-n on the transmitting side, and a transmitting mixer 41.
-1 to 41-n and radio transmitting circuits 46-1 to 46-n including transmitting units 31-1 to 31-n. and the transmission and reception shown in Figure 1M! The configuration is the same as that of ff190B. These wireless bases 830E and transmitting/receiving a90
By using the radio base station 30C using C, it is possible to expect a diversity effect at the time of transmission of a control signal in a high-speed moving E-do, which will be described later.

Mobile radio equipment 50 (B, C, D> and radio base station 30 (
B, C, D, E);11 control signals between fl gate exchange a20 use the υ111Ilft/channel dedicated for control signals, and when using outside the communication (talk) signal band. There is.

In order to transmit this control signal outside the communication (speech) signal band, specifically, when the control signal is an analog signal, a second
As shown in figure (a), the communication channel band is 0.3 to 3.
．． Low frequencies foo outside 0KHz (e.g. about 100H
z) or high frequency fD1. fD2=f03”・f
08<For example 3.8K)-1z to 0.1K)-1z
8 waves up to 4.5 K)lz) are used.

When there are many items to be controlled, that is, many control data, the control frequency f. It is also possible to increase the wave number of 0" 108 roughly, or to adopt a subcarrier format. In this case, for example, frequency modulation can be applied to one or more waves behind fDO" f08, or By applying amplitude modulation, more control data can be transmitted.

Furthermore, when a digital data signal is used as a control signal, it is also possible to digitally encode the audio signal and time-division multiplex the two to be transmitted.
Shown in Figure (b). FIG. 2(b) shows an example of a case in which an audio signal is digitized by a digital encoding circuit 91, and this and a data signal are multiplex-converted by a multiplex conversion circuit 92, and then applied to the modulation circuit of the transmitter 31.

Below, the functions of the mobile radio 150 (B, C, D), the radio base station 30 (B, C, D, E), and the gateway switch 20 will be explained in order.

(Δ) Mobile radio a50 (B, C, D> First, among the functions provided by the mobile radio a50 (B, C, D), the functions of the control unit 58 (B, C, D> will be explained. Control Part 5
8 (B, C, D) has the following basic functions.

i) Self-movement lQFM 50 (B, C, D>) commands the radio transmitting circuits 66 to emit or stop transmitting radio waves and controls the transmission power level.

Regarding transmission power control, when installed in a car, the transmission power will vary greatly depending on whether or not the wireless base station that communicates with it is for a wide area, and the transmission wireless channel, or radio frequency, will also vary depending on the system. There are five differences, but in general, because they are different, they have functions that can deal with them.

11) Instructs the radio receiving circuit 6B of its own mobile radio device 50 (B, C, D> to receive or stop radio waves.

1ii) Instructing the telephone unit 59 whether or not to send a dial signal and instructing the transmission/reception of voice.

V) Synthesis groups 55-1 to 55-n and 56-
Specify oscillation frequency (channel), oscillation command, and stop command for 1 to 56-〇.

V) R1 controller 65C, 67C for reception and transmission switching
For control commands.

vi) Determining whether or not to change one or more channels to be used based on information from the communication quality monitoring unit 57.

vii) Determining whether or not to change the channel to be used based on information from the interference detector 62.

viii) ID/Roam area information verification storage unit 54
Confirm the ID of the other party to communicate with and determine the channel to be used based on the information from.

ix) Handover of speech channels to mobile radios of higher service types.

x) Determination of on/off duty conditions for the reception (transmission) switching controller 650.67C.

xi) be higher than the radio base station 30 (8°C, D, E) in terms of control decisions; When this differs from the radio base station 30 (B, C, D, E) regarding control decisions, the radio base station 30 (B, C, D).

E) to be able to exercise initiative over

xii) Determination of the moving direction and speed of the mobile radio 50 (B, C, D>) based on information from the communication crystal rfI monitoring unit 57.

:<1ii) f-hyperactive radio device 50 (B, C, D)
1.Report from each wireless base station 30 (B, C, D, E) that received a call (control channel used) - Calmly, choose the wireless base station 30 with the best received signal quality. (B
.

C, D, E) and the next best wireless base station 30 (B, C.

By detecting the moving direction, speed, etc. of the mobile radio device 50 (B, C, D>) or the mobile radio device 50 (B, C, D>), the radio base station 30 (B, C) of the new zone anticipates the destination zone.

D, E) 8, for which the point in time which should be used for communication with the mobile radio device 50 (B, C, D) from among the radio channels assigned to that non-Nizumi base station; Specify a call channel number that is not in use. For wireless base stations with degraded communication quality, the mobile wireless device 50
(Sends a command signal to stop communication with B, C, , D>.

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

1) Check the ID/roam area information collation storage unit 5 to check the radio channels used by other mobile radios or other radio base stations operating in the vicinity of the own mobile radio 50 (B, C, D>)
4 and used when making a call or switching communication channels.

2) As an application of the functions of x) and xi), when call traffic increases, the number of channels used for communication at the same time can be eliminated, or calls can be suppressed, and channels in use can be cut off or early termination recommended. .

3) Using the functions of +), vi) and vii),
Setting the optimum transmission level for own mobile radio device 50 (B, C, D).

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

5) Determine the optimal channel to use depending on the type of communication (telephone, FAX data, etc.). In addition, the control functions associated with the transition to another zone include 6) selection of a new wireless base station 30 after switching channels during communication; At this time, taking into consideration the moving direction of the mobile radio device 50 <B, C, D),
New wireless base station 30 (B.

Select C, D, E). In order to prevent signal collision, each radio base station 30 (B, C, D, E) is instructed on the timing of response signals.

7) For the gateway switch 20, the wireless base station 30 (
Opening/closing the switch group 23 of the communication path and requesting parallel use of the communication path via (B, C, D, E).

8) After the mobile radio 50 (B, C, D) starts talking,
If the communication traffic situation within the system allows, determine whether to implement transmit/receive diversity and instruct the execution of the operation.

9) Mobile radio device 50 performing transmitting/receiving diversity
Regarding (B, C, and D), if there is traffic congestion, or if an important subscriber makes a call or a person requesting broadband signal service appears at that time, the multiplicity of transmitting and receiving diversity (number of channels used) should be increased. Determination and execution of reduction or termination of diversity.

10) According to items 1) to 7), the mobile radio device 5 during communication
0 (B, C, D), even if they are within the same zone or change zones as the location changes.
0 If the quality of communication with (B, C, D, E) deteriorates, determine whether to switch the channel during communication (busy) for that channel. Note that in order to perform this operation, it is necessary to send a control signal to the opposing radio base station 30 (B, C, D, E), and this instruction (control signal) is shown in FIG.
As shown in a), this is carried out using a communication channel and a frequency band above or below the frequency band of the communication signal.

11) By moving the mobile radio devices 50 (B, C, D), each wireless base station 30 (B
, C, D, E) before moving the measurement results of reception quality changes Fj
50 (B, C, D>).
11 The moving direction and moving speed of radio equipment 50 (B, C, D) were estimated, while the mobile radio equipment (8, C,
Wireless base stations 30 in the moving direction of D> (B, C, D, E)
The traffic status (the usage status of communication channels) in these wireless base stations 30 is comprehensively judged, and if necessary,
(B.

Mobile radio device 50 (B, C) communicating with C, D, E).

D) Determine whether to gradually decrease or increase the multiplicity of transmitting/receiving diversity.

Furthermore, if the control unit 58 recognizes that the moving speed of the mobile radio 50 exceeds a certain value, or the gateway switch 20
or wireless base station 30 (B, C.

The control functions when recognized by communication from D, E) are as follows: 12) Mobility fi! When the IQ device 50 (B, C, D> is in standby state, the wireless base station 30 (B, C, D, E)
The transmission of the location registration signal, which is performed every time the zone is crossed, is stopped.

13) In the state of 12>, the mobile radio has 50
The standby channel of the radio receiving circuit 68 (B, C, D) should be set to the paging channel transmitted from the wide area radio base station 17.

14) If the state is 12>, the mobile II device 50
The location registration signals from (B, C, D> are transmitted to the wide area wireless base 817 using the uplink control channel corresponding to the downlink control channel transmitted from the wide area wireless base 817.

Here, moving N line I! In order to recognize the moving speed of I50, there is a method in which the communication quality monitoring unit 57 measures the cycle of instantaneous electric field fluctuations due to fading, or a method in which the temporal change in the average received electric field value is measured.

The former is based on the fact that there is a proportional relationship between the moving speed and the period of electric field fluctuation, and the review is based on the fact that the average received electric field value changes as the distance from the transmitting point to the receiving point changes.

However, in order to estimate the accurate speed of the mobile radio device 50 (B, C, D>), the mobile radio device 50 (B.

C, D> White, as well as multiple wireless base stations 30 (B, C, D, E) in the surrounding area, or wide area wireless base station 1
7 also performs measurements similar to those described above, and the gateway exchange 20 and mobile radio R50 (B, C, D) aggregate and calculate these measurements.

To express the above control function in one word, some of the functions of the radio network control station 12 in FIG.

D). This becomes possible only by using VLSI technology, which has recently made remarkable progress, and can be described as making mobile radio equipment intelligent. However, even if mobile radio equipment is made intelligent using conventional technology, there is a limit to its effectiveness, especially when it comes to improving radio line control capabilities and eliminating instantaneous interruptions when switching between telechannels during a call. Therefore, it is only by using the method according to the present invention that it becomes intelligent in both name and reality.

(8) Radio base stations 30 (B, C, D, E) A device having the following functions is installed in each of the radio base stations 30 (B, C, D, E).

a) Each radio base station has a dedicated radio transceiver for transmitting and receiving a small number (usually one) of control channels, and a telephone channel
There are a number of radio transceivers dedicated to each radio base station, and a number corresponding to the number of communication channels assigned to that radio base station. For example, assume the wireless base station 30C in FIG. 1F.

The number of communication channels to be allocated to one radio base station 30C is determined by the number of communication channels [50
(B.

The optimum value is given by the call traffic in C).

If the area of the zone is large and there are many mobile radio devices in that area, the number of calls will inevitably increase, so at least one control channel and multiple call channels are required, and transmission and reception Naturally, a plurality of machines 90 (Fig. 1G) are required. In NTT's car telephone system, there is an example in which two control channels and a communication channel of up to 60 V channels are allocated in the case of a large conference.

However, the size of the zone gradually became smaller, and finally, the above-mentioned document 9 Fuji, "Proposal of Mobile Telephone System, Communication Society of Japan, Communication System Study Group Material C5-86-88, 1986, 1
As shown in January, when it comes to an extremely small zone called a microcell with a radius of about 25 rn, it is recommended that a wireless base station that handles this area as a novice area be installed there due to call traffic, method, and cost. One wireless channel is used for control and one for calls.
In some cases, the function of the wireless device that covers this is 1 transmission/reception. In other words, one transmitter/receiver is controlled
This means that it will be used for both calls and calls (see Figure 1E). What's more, this dual-purpose system initially controls the control channel when a call is made from a certain mobile radio, as in conventional systems.・Invasion by specifying a free call channel is not a simple method of changing to the call channel and communicating with the same mobile radio, as will be explained later. Even during communication using a radio device and a voice channel, as described later, by repeatedly switching between the voice channel and the control channel at a switching speed that does not interfere with the transmitting/receiving radio frequency, new signals can be generated. A feature of the present invention is that it has an excellent function of accepting calls to and from mobile radios 50 (B, C, and D) that wish to make and receive calls, and also to make it possible to make and receive calls.

As explained above, wireless base #30 (8, C.

Various cases can be considered for the configurations D and E), and the present invention is applicable to all of them.

However, in the wireless base station 30 of FIG. 1A-1, only one set of transmitter/receiver is shown, and the necessity is omitted.

b) The transmitter/receiver dedicated to the communication channel installed in each radio base station 30 (B, C, D, E) is connected to the radio channel assigned to that radio base station. It goes without saying that it is possible to receive the back 1 ↑ channel of multiple radio channels within the I channel, but in zones where radio frequency fluctuations are severe, it is necessary to Assume that the transmitter/receiver 90 for one round is configured as shown in FIG. 1G, for example.

That is, the configuration of the portion that transmits and receives radio signals is substantially the same as that of the mobile radio device 50 shown in FIG. 1B. As a result, call traffic in this zone increases and is typically
Even in the wireless base station 30C, where m transceivers 90 are installed to support channel communications, due to an increase in call traffic, if communications over η channels become necessary, A control signal sent from a control unit 38C in the base station to one transceiver 90 constituting the base station 30C controls the synthesis unit 35- which is currently in operation.
In addition to 1.36-1, 35-2.35-3°..., 35
-n and 36-2.36-3. ..., 36-n and changeover switches 44-1 and 44-2 are operated. As a result, what was previously possible to transmit and receive using m channels becomes possible to transmit and receive using up to m×n channels. The number of channels that can be used simultaneously increases dramatically.

However, the transmission power of each channel will decrease depending on the number of switchings unless a power amplifier is installed at 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 will decrease. It becomes the upper limit. Alternatively, if interference is to be caused to a channel that is communicating in another zone, the number of channels less than that is the limit.

The radio base station 30B in FIG.
0 (Even during communication using the communication channel with B, C, D>, the communication channel and control channel are switched at a switching speed that does not interfere with the transmitting/receiving radio frequency as described above). By repeating the switching, it is possible to accept the call operation and make it possible to make and receive a call even to the mobile radio device 50 (B, C, D>) to which a new call is desired.

Hereinafter, it will be further explained using Fig. 1G, but Fig. 1C,
Radio base station 30.30 in Figure 1E, Figure 1, Figure 1L
The functions of the wireless base station 30G equipped with the transmitting/receiving units 190B, 30D, 30E and the transmitting/receiving units 190B, 90C shown in FIGS. 1M and 1N are also substantially the same.

The control unit 38C has the following basic functions.

) Commanding the transmitter 31 of the transmitter/receiver 90 included in the own radio base station 30C to emit or stop transmitting radio waves, and controlling the transmission power level.

ii) Instructing the receiving unit 33 of its own wireless base station 30G to receive or stop radio waves.

1ii) Notify the barrier exchange ViM20 of whether dialing signals can be sent or not, and whether voice transmission/reception is possible.

iv) For the synthesizer groups 35-1 to 35-n and σ36-1 to 36-n, specify the starting frequency (channel), and send the starting command and stop command.

V) For the reception and transmission switching controller 45.47,
Control command.

vi) Communication quality monitoring receivers 93-1 to g3-rn
The mobile radio device 50 (B.

Determine whether or not to transmit to C, D>.

vii) Determining whether or not to change the channel to be used based on information from the interference detector 42.

viii) Confirmation of the ID of the other party to communicate with and determination of the chitnel to be used based on the information from the ID identification storage unit 34C.

ix) Based on a request from a mobile radio with a higher rank of Levis type, the mobile radio 50 that is currently talking (B.

Aim to end communication with C and D> early. Or terminate immediately.

X) For reception and transmission switching controller 45.47,
Determination of on/off duty conditions.

xi) Regarding control decisions, mobile radio 50 (B.

Must be lower than C, D>. This is a control publication [1L
flll, mobile radio IN50 (B, C, D> and [1
'>U, the initiative is transferred to the mobile radio device 50 (B, C, D) by λ·j. However, xi
) has been determined for convenience of explanation, and in an actual system, there is no problem even if the wireless base station 30 takes the initiative.

xii) As already explained in a) and b), a radio that serves both a communication channel and a control channel must have (
A> The mobile radio device 50 (B, G.

Similarly to D), it has a plurality of synthesizers 35-1 to 35-n, 36-1 to 36-r) as shown in FIG. By repeatedly switching between the communication channel and the control channel at a switching speed, the mobile radio device 50 that wishes to make or receive a new call
(It must also have a function that allows calls to be made and received from B, C, and D> as well as to enable calls.

xiii) The random number obtained by the built-in random number generator in the ID identification storage unit 34 (34G) is compared with the response timing command signal instructed from the pre-movement 1150 (B, C, D>, and the instruction is matched. It must have the function to send a response signal at the specified timing.

xiv) Able to communicate with wide area wireless base station 17.

XV) Communication channel number used to communicate with mobile radio device 50 (B, C, D) and mobile radio device 50
(Have a function of transmitting unique information such as Revis class of B, C, D>, and dynamic information such as moving direction to the ID identification storage unit 24 of the barrier exchange 20.

Next, by using the functions i) to XV) in combination, the following applied functions are provided.

1) Store in the ID identification storage unit 34C the radio channels used by other radio base stations in operation or other mobile radio devices around the own radio base E30 (B, C, D, E). Use this when making a call or switching channels during communication.

2) As one application of the functions of vi), vii) and ix), when there is congestion of call traffic, suppressing calls, cutting channels in use, or issuing early termination recommendations.

3) Using the functions i), vi), and vii),
Setting of the optimum transmission level in own radio base station 30 (B, C, D, E).

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

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

In addition, the control functions associated with transition to another zone include: 6) Mobile radio device 50 (B,
Based on the signals from C, D>, communication of reception quality data and new wireless base station 30 (B, C).

If selected as D or E), start communication.

7) For the barrier switch 20, the mobile radio 50 (
Based on requests from B, C, and D), opening/closing the switch group 23 of the communication path and requesting parallel use of the communication path.

8) After switching channels during a call, for a certain period of time, the mobile radio FJ50 (B, C, D>
D and phone number [・Memorize the phone number.

9) Utilizing function ×i), the mobile radio 50 ([3,C,D>
The timing when B, C, D, E) responds is determined by following the response timing instruction included in the calling signal of the mobile radio 50 (B, C, D>), and using the random value generated at that time. To be determined by.

10) Utilizing the functions of the wireless base station 30 (X1V)
For the mobile radio equipment 50 (B, C, D>) that is moving at high speed in the vicinity of B, C, D, E), it waits on the communication channel specified by the information from the wide area radio base station 17.

To express the above control function in one word, some of the functions of the radio network control station 12 in FIG.

D, E), wide area wireless base station 178 and mobile wireless device 50
(B, C, D>), it became possible to accommodate all the functions of the radio line control station 12, and it became possible to abolish the radio line control station 12.

However, using the conventional technology, the radio base station 30 (
Even if B, C, D, E) and wide-area wireless base stations 17 are made intelligent, there are limits to their effectiveness, especially in terms of improving the radio line control ability and eliminating instantaneous interruptions when switching channels during a call. is completely ineffective, and it is only by using the method of the present invention that it becomes intelligent in both name and reality.

(C) Wide area radio base station 17 If the moving speed within the service area of the mobile radio 1a50 (B, C, D) in standby state exceeds the value determined in the system design, location registration ( Mobile radio! a50 (Sends a control signal to stop location registration signal transmission to The mobile radio a50 ([3,C.

When D) shifts to a high-speed moving state during a call, channel switching is performed to the wide area wireless base station 17 during the call.

Wide area wireless base station 17 (
17-1 to 17-i) are mobile radio a50 (B) in the mobile communication system according to the present invention.

C) is used to communicate with the mobile radio a50 when there is an incoming call while moving at high speed while on standby as shown above. Mobile radio v150 in the above state (
B, C, D) (7) Reception M 53 C. The control channel sent from the wide area wireless base station 17 is being received, and the wide area wireless base station 17 is connected to the gateway exchange via the control signal interface 152. 20 and transmits the control signal through the downlink control channel, and also receives a communication (talk) signal from the barrier exchange l120 via the communication signal interface 153, and transmits the control signal through the communication radio channel.
talk) to send out a signal.

The wide area radio base station 17 also has mobile vJ radio equipment 50 (B, C
, D> is used when the user makes a call while moving at high speed. This is as if the mobile iPl radio 50 (B, C, D) were the wireless base station 30 (B, C, D).

The call can be established by performing the same operation as for calling E). However, mobile radio 115
0 (B, C, D) is the wireless base station 30
Compared to cases (B, C, D, E), the gravity sphere has been increased to the required level.

Even if the mobile radio device 50 (B, C, D> is in standby mode but cannot register its location for some reason, it can be used to send a call or call signal in the same way as above). It will be done.

In other words, the mobile radio device 50 (
B, C, D>, the barrier exchange ta20 searches the ID identification storage unit 24, and if the above state is confirmed, the call path control unit 21 calls the wide area wireless base station 17. The mobile radio 50 (B, C
, D>.

After receiving the above-mentioned incoming call signal, the mobile radio device 50 (B, C
, D> can receive a call by performing almost the same operation as the calling operation described later.

In addition, by including necessary information regarding the start of a call, such as the surrounding communication traffic situation and the number of usable call channels, in the control signal sent from the wide area radio base station 17 to the mobile radio station 50, the system as a whole can be improved. operations will be smoother.

The configuration of the wide area wireless base 817 is similar to that of the wireless base station 30 of the present invention.
The configurations are the same as those in (B, C, D, E), but the only difference is the size of the transmission power and the given channel (frequency band, etc.). Several sets to 10,100 call transmitters are required during call traffic; two sets are shown in FIG. 1D. The transmission output is for each wireless base station 30.
(B, C.

In extremely small cases (called microcells), such as within a circle with a radius of 25m in the service zone shown in D and E), there are usually 100 to 10,000 microcells (radius of 250Tr1. 2.5) The included service area is defined to the covered value.

FIG. 8 shows the wide area wireless base station 17 and the wireless base station 30 (B, C).
, D, and E). FIG. In the figure, small regular hexagons indicate the (B, C, D, [E) service zones of one wireless base station 30, and in the regular hexagon surrounded by a thick black line in the center, A wide area wireless base station 17 is also provided, and all the illustrated Novis zones (including 37 regular hexagons) are the Levis zones of the wide area wireless base station 17.

The wide area radio base station 17 transmits communication signals to mobile radios 50 located within these areas (incoming calls to B, C, D> from the wide area radio base station 17 to the mobile radio 50) and the mobile radios. tffi50 (B.

Since the wide area radio base station 17 is used to receive calling signals a3 and communication signals from Compared to the base station 30, the number is 100.~1oooo times. However, since the frequency with which the mobile radio device 50 moves at high speed is not so great, FIGS.
Increase the transmitter output of the wireless base stations 30 (B, C, D, E) in Figure L by a factor of ioo to 1000, and change the frequency used so that the wireless channel given for wide area can transmit and receive. If possible, it is sufficient to use only a few or more than 10 radio base stations for transmission and reception.

When the system has a wide novice area and the number of wireless base stations 30 exceeds 10,000, the wide 1fA wireless base stations 17 are also installed at multiple locations instead of just one. In this case, which wide area wireless base station 17 is to be used is determined using information in the ID identification storage section 24 of the barrier switch 20.

In addition, the mobile radio devices 50 (B, C, D> are moving to the 1-nosis area of the adjacent wide-area wireless base station 17 around the 1-bis area of the wide-area wireless base station 17,
And if a call is in progress, a call switching is performed similar to that performed between small zones. In this case, in addition to line control, the gateway switch 20 is in charge of sending out the same call signal from multiple wide area wireless base stations 17, and also controls the repetitive switching and reception of the two transmitted waves transmitted in this way. The mobile radio 150 shown in FIG.
Be in charge yourself.

(D>Gateway Switch 20 The barrier switch 20 having the configuration shown in FIG. 1A-1 has an ID identification storage unit that stores position information of the mobile radio device 50 (B, C) in the mobile communication system according to the present invention. 24 functions), mobile radio equipment 50 (B, C, D) to set communication paths between each other, open and close the switch group 23 under the control of the communication path control unit 21, and operate the mobile radio equipment in the mobile communication system. 50 (B, C, D>) and 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.

In addition, because the mobile radio device 50 is moving at high speed, it may not be able to satisfactorily register the phase difference with the radio base station 30 (B, C, D, E), or it may not receive a signal indicating that the registration function is being stopped. When a call is received by the gateway exchange 20 and is received by the mobile radio 50, the call is established via the wide area radio base station 17. The mobile radio device 50 (B.

For calls from C and D), direct communication is made with the wide area wireless base station 17, and the wide area wireless base station 17 and the gateway switch 20 communicate directly with each other.
The information necessary for making a call is exchanged with the other party, and the call is established.

Roughly, depending on the moving speed of the mobile radio device 50 (8°C, D>, diversity is applied to the transmission path of the call signal to the mobile radio device 50 (B, C, D>). are a route in which the radio base stations 30 (B, C, D, E) are interposed between the mobile radio equipment 50 (B, C, D) and the gateway exchange 20, and a route in which the wide area radio base station 17 is interposed. In this case, the barrier switch 20 is capable of connecting the telephone network 10 and the wireless base stations 30 (B, C).

D, E) and the wide area wireless base station 17.

The functions of the barrier switch 20 will be explained in detail below.

a) Each radio base station 30 that has received a location registration signal (using a control channel) from the mobile radio device 50 (B, C, D>
Based on the report from (B, C, D, E), the ID (self-identification information) of the mobile radio device 50 (B, C, D>) is transmitted via the communication path control unit 21 included in the gateway switch 20. I
D: Store in separate storage section 24 a. In this case, in the present invention, since a location registration request is made from a plurality of radio base stations 30 (B, C, D, E>), the mobile radio device 50 (B, C, D>
The quality of the signal received (decibel values such as S/N and C/N) is also stored.

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

C) An incoming call signal to a mobile radio 50 (B, C, D) is transmitted from a caller included in the telephone network 10 to the own barrier switch 20.
When the communication is transmitted via the communication path control section 21, the switch group 23 to be opened and closed is operated, and the I/O
The called mobile radio device 50 (
Confirm the current location of B, C, D).

d) Mobile radio vA50 (B, C, D> to (7) W
In connection with II'FGC, the called mobile radio 50 (B, C
, D> to transmit a paging signal to the wireless base stations 30 (B, C, D, E) that cover the zone in which the current positions are registered. First, this calling signal is sent to the mobile radio 50 (B.

The current location of C, D> is sent to all J wireless base stations 30 (B, C, D, E), and each received wireless base station 30 (B, C, D, E) ) uses the downlink control channel to send out incoming call signals addressed to the mobile radios 50 (B, C, D>) at the same time.

However, this transmission time does not necessarily have to be the same time, and may be transmitted sequentially in chronological order for each radio base station 30 (B, C, D, E). That is, it is sufficient if measures are taken to avoid interference caused by time differences between signals.

e) Mobile radio equipment 50 (B
, C, D) and the moving direction of the mobile radio 50 (B, C, D,) are stored in the ID identification storage unit 24, and are function to transmit this information to the wide area transmission base station 17.

f) Uplink from mobile radio device 50 (B, C, D>) (from mobile radio device 50 (B, C, D) to radio base station 30 (
B, C, D, E)) For the back phone call signal, a plurality of wireless base stations 30 (B, C, D.

Since the same call signals are transmitted from E) to the barrier switch 20, they are mixed by the call path switch group 23 and sent to the general telephone network 10.

g) Because the mobile radio Ia 50 (B, C, D) is moving at high speed, the location registration with the radio base station 30 (B, C, D, E) cannot be performed satisfactorily, and the location registration is performed using wide area radio. If the base station has been changed to base station 17, the barrier switch 20 will also remember this, but in this case, the mobile radio 1M50
(When there is an incoming call to B, C, D>, a call signal is transmitted via the wide area radio base station 17. Mobile radio device 50
(For calls from B, C, D>, the wireless base station 30
(B, C.

D, is executed by replacing [) with the wide area wireless base station 17.

h) Perform channel switching during a call from one wide area wireless base station 17 to another wide area wireless base station 17.

Next, the operation of the entire system will be explained in terms of the following items.

(1) Location registration (2) Call origination operation (3) Call reception operation (4) Application of diversity during times of low traffic (5) Explanation and theoretical basis of channel switching during a call and the diversity effect.

(6) Communication channel v1 method for estimating the moving direction and moving speed of a mobile radio and taking measures against traffic width.

(1) In the home area, which is the permanent location of the location-registering mobile radio 50 (B, C, D>), or in the ROHM area, which is an area within the service other than the home area, When the radio base stations 30-1 to 30-n are operating, the mobile!FJ radio equipment 50 (B, C,
When the power switch of D) is turned on and starts operation,
The first thing that is performed is a location registration operation. The flow of this location registration operation is shown and explained in FIGS. 4A and 4B.

When the power switch of mobile #J radio 50 (B, C, D> is turned on, a signal to start the operation to register the current position is sent to the surrounding radio bases using the uplink control channel (CH). The mobile radio 50 (B, C,
The control signal sent from D) also includes its own ID and a signal for determining the transmission timing of the response signal returned from the surrounding wireless bases (B, C, D, E). . A radio base station 30 that can satisfactorily receive control signals transmitted from the mobile radio device 50 (B, C, D>
The existence of not only one but a plurality of (B, C, D, E) occurs quite frequently in a small zone system using micro cells. Then, in these plurality of radio base stations 30 (B, C, D, E), the mobile radio 150
For (B, C, D), response signals will be sent at the same time unless special measures are taken. Since the response signals from these plurality of radio base stations 30 (B, C, D, [E>) are simultaneously received by the mobile radio device 50 (B, C, D>), interference occurs. Accurate signal reproduction may become impossible, making location registration impossible.

In order to prevent this, the mobile radio device 50 (B, C
, D), which inserts a signal for determining the transmission timing as described above into the control signal sent from C. Specifically, for example, there are the following signals.

i) The higher the reception electric field level of the signal from the mobile radio device 50 (B, C, D) is, the faster the response signal is sent out. For example, if S/N = 50dB or more, immediately
When N=45.40, 35.30 dB or more, 1, 2, and 3.4 seconds later are determined, respectively.

ii) The ID (self-identification number) given to each wireless base station 30 (B, C, D, E) with the smallest last digit (in decimal system) is transmitted early. For example, if the last digit is 0.
．． 1, 2, 3, 4. . . , 9, then 8 - each transmission timing is 0. 0.5. ..., 4. .

Make it send in 4.5 seconds.

) The radio base stations 30 (B, C, D, E) located in the moving direction of the mobile radio FM 50 (B, C, D>) are targeted, and if there is a plurality of these stations, the above i) and ii) are incorporated.

(2) For each radio base station 30 (B, C, D, E>), a so-called repeating zone number used in the small zone system is given, and +i) above is applied to this. Note that the number of repetition zones indicates the degree of reuse of frequencies used in the system, so for example, it is 7. .

D, E), when divided into serviceable zones (hexagons), there are 7 different frequencies (7 squares).
This means that service is possible in all areas of any size plane. In addition to 7, the number of repetition zones N is 3.4.9.12.16.19.21.25.
...etc. are often used.

■) Regarding ii) above, each wireless base station 30 (B.

C, D, E), each wireless base station 30
(B, C, D, E), when the random number generator is reset and the position@registration request signal is received, the wireless base station 30 at this point (
It is also possible to cause the random numbers (B, C, D, E) to respond early in descending order of random numbers.

vi) The radio base stations 30 (B, C, D, E) transmit response signals in descending order of the number of empty channels stored. For example, when the empty Tyrenelle number is 10 or more, respond immediately, when it is 9 to 7, after 1 second, when it is 6 to 4, after 2 seconds,
When it is 4 to 2, the response is made to respond after 3 seconds, and when it is 1, it is made to respond after 4 seconds.

vii) I of wireless base station 30 (B, C, D, E)
In the case of a plurality of channels, the number of communication channels that can be transmitted at N time is 20M, and the same timing as in vi) above is set for transmission.

Even if the above measures are taken, the possibility of signal collision (interference) due to simultaneous transmission still exists, although it is extremely small. Measures to deal with these issues will be explained below.

a) The wireless base station is the mobile thermal RS machine 50 (B, C.

D) Even though a certain period of time has passed since the response signal was sent to the addressee, if the location registration signal described below is not sent out (undetectable), the wireless base station 30 that sent the response signal (B , C, D, E), nrf movement mFj
1150 (B, C, D) (7) Retransmit the same signal at the specified timing.

b) In a), especially the mobile radio 50 (B.

C, D>, if the retransmission timing is not determined, for example, the wireless base station 30 (B, C, D).

E) Resend the white meat at the timing determined by a random number table, etc. It contains the signals mentioned above.

In accordance with the gist of the location registration described above, the operations from step 3202 onward in FIG. 4A proceed. When surrounding radio base stations, for example 30-1 to 30-n, receive an operation start signal from the mobile radio device 50 (B, C, D>
202>, the wireless base station 30 (B, C, D, E) is connected to the mobile wireless device 50 (B.

If the downlink control channel is off, turn it on and use the downlink control channel to permit location registration signal transmission. (820
4).

Upon receiving permission to send a location registration signal (3205), the mobile radio devices 50 (B, C, D> transmit a location registration signal with their own 10 (identification number) using the uplink control channel (3205). S206>.Communication using this control channel is possible even in the wireless base station 30B shown in FIG. Even when used with a radio, multiple channels can be chopped at high speed and sent and received at the same time.
Always secured.

Depending on the system, mobile #J radio 50 (B, C
, D> to start the above-mentioned location registration (3201, FIG. 4A) and the surrounding wireless base station 30
It is also possible to use the same signal and simplify the location registration signal (3206>) to be sent only once after obtaining permission to send the location registration signal sent from (B, C, D, E).

Upon receiving the location registration signal (S207>, the wireless base station 3
0 (B, C, D, E), the reception quality is inspected and the ID
The ID is stored in the identification storage unit 34 (320B>. If the reception quality is above a certain value as a result of checking the reception quality (S209)
YES (Figure 4B), send the location registration request signal to the gateway switch 2.
0 (3210>. This registration request signal is received (S211>) The barrier switch 20 registers that the reception quality and position are stored in the plurality of wireless 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, D, E), the data is transferred to the mobile radio device 50 (B, C, D>) using the downlink control channel.

Mobile radio device 50 receives the registration completion signal (S215)
(B, C, D> is the rD (identification number) of each wireless base 830 (8, C, D, E) registered after inspecting the received contents.
is stored in the 10 roam area information collation storage unit 54 (
S216n.

With the above operations, the location registration operation is completed and the device enters a standby state for an incoming call.

Note that, as is clear from the above description, the mobile radio equipment 50 (B, C) of the mobile communication system according to the present invention.

D) Location registration differs from conventional systems in that registration is performed at multiple locations (in units of focal line base stations).

This represents one feature of the present invention.

In addition, when storing location registration information, the radio base stations 30 (B, C, D, E) and the gateway exchange 20 also use location registration signals sent from the mobile radios 50 (B, C, D>). For example, in the gateway switch 20, the quality of the mobile radio 50 is measured and stored including the value.
(The wireless base station 30 (B, C, D, [E) that had the highest reception quality to store the location registration signal of B, C, D>
For example, they are stored in order of receiving quality as shown below.

Table 1 Wireless base stations Mobile radios Received product ￥J Date of delivery 10 10 S/N (C/N) Hours, minutes, seconds 30-1 50 50 1987.
8,113,24.56 30-2 ri0 45 987,8
,113 24,56 30-3 50 35 987.8,
113, 24.56 30-4 50 30 987.8,
1113, 24.56 30-5 50 25 1987.8,
1113, 24.56 Similarly, each radio base station also has the radio base station 30 (B, C.

It stores not only the information received by stations D and E) but also the information received from surrounding wireless base stations as shown in Table 1. This occurs when a communication path is established between the mobile radio 50 (B, C, D>) and when channel switching is performed during a call due to the movement of the mobile radio !150 (B, C, D>). Not only is this useful information, but the mobile radio 50 (B, C,
This is because it is necessary to determine the moving direction, speed, etc. of D>.

For the same reason as above, mobile radio equipment 50 (B, C,
The ID roam area information collation storage unit 54 in D> also stores information in the same manner as in Table 1.

Next, assume that the mobile radio 50 (B, C, D>) is on standby (not talking) and moves from the zone where its location has been registered and moves to an adjacent zone. 30 (B.

In a system in which control signals are constantly sent from stations C, D, and E), the wireless base station 3 included in the received control signal
0 (B, C, D, E), mobile radio device 50 (
It can be determined by comparing it with the ID stored in B, C, D>.

In a system in which control signals are not always sent from the wireless base stations 30 (B, C, D), the mobile wireless devices 50 (B, C, D) transmit signals from the surrounding wireless base stations 3 at predetermined time intervals.
0 (B, C, D, E) using the uplink control channel, and in response to this request, each radio base station 30 (B, C, D.

Wireless base station 30 (B, C) sent from [).

This is possible by comparing the IDs of D and E) with the ID information recorded in the mobile radio device 50 (B, C, D).

In any of the above systems, among the ID information of the wireless base stations 30 (B, C, D, E) obtained as a result,
Until then, mobile radio equipment 50 (B, C.

If there is at least one new base station ID information different from the base station ID information stored in step D), the mobile radio 50 (B, C.

D) is determined to have moved to a new zone, and the control unit 58
(B, C) are the ID roam area information verification storage unit 54
Execute update of location registration. That is, the ID information of the mobile radio 150 (B, C, D>) is transmitted to the surrounding radio base stations 30 (B, C, D, E) using the uplink control channel.

A plurality of wireless base stations 30 (B
, C, D, E), perform the same procedure as already explained and send the mobile radio 50 (B, C,
D>'s location registration signal is sent.

In the barrier exchange 120 that received this (g), the mobile radio 50 (B,
As the location registration information in C and D), the conventional information is rewritten with new information. As a result, the mobile radio device 50 (
The location registrations of B, C, D> are updated.

The above update work is performed on the mobile radio device 50 (B, C.

This is necessary because D) is on standby, and if you move to a new zone during communication (talking), the new communication channel will be assigned to the new radio base station 30 (B, C, D
, E) and mobile radio 50 (B.

C, D>, the location registration in the gateway exchange 20 is updated at the same time, so no special operation is required.

Note that in a system where the number of radio devices installed in the radio base stations 30 (B, C, D, E) is small and the radio devices for control channels are diverted to communication channels, the radio base stations 30 (B, C, D, E) are other mobile radios 150 (B
, C, D), if you use the conventional technology, there are no other mobile radios on standby, so even if another mobile radio sends a location registration request, it will be considered an invalid call. It had become.

However, as a configuration of a mobile radio device, for example, a plurality of synthesizers 551 to 55-n, 5 as shown in FIG.
6-1 to 56-n and switch 64-1, 64-2, etc., it is possible to communicate with other mobile radio devices by repeatedly chopping and turning off the transmitting and receiving channels. Even in the middle of the day, it is possible to communicate with the newly incoming mobile radio device 50 (B, C, D>) using the control channel. Therefore, it is possible to accept location registration.

Additionally, when the mobile radio's moving speed within the service area in standby mode exceeds the value determined by the system design, the traffic requesting location registration (change) increases.
In addition to causing traffic congestion, there is also a possibility that accurate transmission of location registration signals may not be performed. A control signal is sent to the radio device 50 to stop transmitting the location registration signal, and from then on, until the moving speed falls below the value determined by the system design.
It is configured to maintain the state of location registration with the wide area wireless base station 17.

Furthermore, when the portable mobile radio 1150 is connected to the car's battery B2, it automatically connects to the nearest wide area radio base station 1.
7 may be registered.

The wireless base station 30 (B.

In C, D, and E), the following signals are sent to the barrier switch 20.

) ID1i of the mobile wireless access device 50 that transmitted the data1ii) ID of the wireless base station 301ii) Time of reception On the other hand, the barrier switch 20 that received this signal inspects the content of the signal and stores the above-mentioned signal in the ID identification storage unit 24. remember.

This memory content is stored in the portable vJ radio 50 (B, C.

It is used to determine which wide area transmitting base station 17 should send a paging signal when there is an incoming call assuming that station D,) is in high-speed moving -E-do.

When the mobile radio devices 50 (B, C, D>) are in the high-speed movement mode, the wide area radio base station 17 is used, and the flow of the location registration operation in this case is shown in FIGS. 40 to 4I. explain.

11, which is the permanent location of the mobile radio equipment 50 (B, C, D)
--Home area or one node outside the home area
- In the ROHM area, which is an area within the service, the gateway switch 20 and surrounding wireless base stations 3O-1j5
When the power switch of the mobile radio device 50 (B, C, D> is turned on and starts operating while the wide area radio base station 17-1.17-2.17-3 is operating, location registration is performed. An action is taken.

When the power switch of the mobile radio device 50 (B, C, D) is turned on, a signal to start an operation for registering the current location is sent to nearby radio base stations, for example, using an uplink control channel (CH). Sent to 30-1 (5401
, Figure 4C).

t-no mobile radio ti50 (Ij from B, C, D>
+Receives operation start signal 5402), wireless base station 3
0-1 confirms that the mobile radio 50 (B, C, D> has started operating 3403), and if confirmed (3403 YES)
, if the downlink control channel is off,
This is turned on and permission to send a location registration signal is sent using the downlink control channel (S404).

However, since the mobile radio devices 50 (B, C, D) are moving at high speed, the radio wave propagation characteristics are poor, and the communication terminal receives this signal from the radio base station 30-1 near R (3405).
>, good reception is not possible (3406NO>).

Therefore, after a certain time timing, the mobile radio 50
(B, C, D> retransmit the same signal (3407,
Figure 4D.

The radio base station 30-1 receives the retransmitted operation start signal as "
When the reception is confirmed (S/108) and the start of operation is confirmed (S40
9YES), a location registration signal transmission permission is transmitted through the control channel (CI-1) (3410).

When the mobile radio device 50 (B, C, D> receives the location registration signal transmission iT OK (3411), it checks whether it has been received well or not (5412>), and if it is received well. If there is not, or if it is impossible to accept (3412 NO>), the position σ recording operation is performed again (S413).

This location registration operation II■ Radio base station 3 that received the start signal
In 0-1 (S414), when the start of operation is confirmed (34
15Y [ES, Figure 4E), to send the location registration signal';
(If [3, C, D> cannot be received well or cannot be received, (3417, 8418 NO>, if the number of bad receptions has not reached the specified number n (for example, n-3) (8419NO>, step 541
Repeat the operations from 3 to 5418, and if the specified number of times n is reached, although there is a very small probability, (S419YE
S), mobile radio device 50 (B, C, D) determines that the white body is moving at high speed, and abandons communication with the radio base station 3o-1 according to the control signal transmission method for high-speed movement mode, Decided to communicate with wireless base station 17 (8420)
542 to start transmitting and receiving operations on the wide area communication channel.
1, Fig. 4F), control channel for wide area communication (C)-1
), a request for permission to send a location registration signal and a request for measurement of moving speed 8 is sent to the nearest wide area radio base station, for example, 17-1 (S422).

This speed measurement request signal is sent out at regular intervals and includes information indicating that the vehicle is in high-speed movement mode.

At the nearest wide area wireless base 817-1 that received this measurement request and location registration permission signal (3423), if the reception condition is good (S424YES), the mobile wireless device 50 (B, C).

D) recognizes that it is in high-speed movement mode and sends a location registration signal sending permission signal (S425).

Location registration signal transmission module'F from wide area wireless base station 17-1
Mobile radio t150 that received signal available (B, C.

D) (3426) sends a location registration signal (S42
7, Figure 4G).

The wide area wireless base station 17-1 that receives the location registration signal from this high-speed moving road inspects the received content and stores it (3
428>. If this reception quality is above a certain value (342
9), wide area=XS base station 17-1 sends mobile radio equipment 50 (B, C
, D) of the signals sent at regular intervals? The limit value ri is measured, and the position σ record request signal g is used as the measurement value for determining the speed j! and the barrier is exchanged Ij! Send to M20V
(S430) The barrier communication J% 12N 20 that has received the received electric field signal and the location registration signal (3431) is difficult to measure the speed of the mobile radio device 50 (B, C, D>) with only this change in the received electric field. If so, it sends a speed measurement request to surrounding wide area wireless base stations 17-2 and 17-3 as well (3432>. In response to this, wide area wireless base stations 17-2.
In step 17-3, the speed is measured (3433) and the result is reported to the barrier switch 20 (S434, 41st-
Figure 1).

Upon receiving this report, the barrier switch 20 receives information from each wide area wireless base station 1
Mobile radio 50 for 7-1.17-2.17-3
Find the speeds of (B, C, D) and compare them,
Mobile radio device 50 (B, C, D> are wide area radio base stations 17
-1.17-2.17-3 in the direction of velocity v1.
v2. Calculate that you are moving in V3 (3435)
. Therefore, if you register the reception quality and location, the gateway switch 20
Now, let's use this speed information lazily to wide area wireless V other station 17-1.
゜17-2. Send to 17-3 3437,438゜4
39>, wide area wireless base station 17-1.17-2゜17-
3, the wide area wireless base station 17-1 receives and stores this, and also receives the registration completion report at the same time, transmits this to the mobile wireless device 50.
(B, C, D) (S440>).

Upon receiving this, the mobile radio device 50 (B, C, D) identifies each ID of the wide area radio base station 17-1.17-2.17-3.
is stored and the location registration operation is ended (3442).

The location registration here is due to the high movement speed.
Location registration is not effective. For this purpose, the direction of movement and speed are measured and the speed information is used.

In the operation of the present invention in this high-speed movement mode, the reception of the signal from the wide area wireless base station 17-1.17-2.17-3 is much faster than in the case of the low-speed movement mode. It is designed to be easy to do. It is the nearest wide area radio base station 17-1 that has received the location registration operation start signal from the mobile radio 650 ([3, C, D) in high-speed movement mode.
Then, the mobile heat a machine 50 (B
.

C, Dl) Speed information empty, mobile radio Ia50 (B.

C, D> is in high-speed movement mode, and the mobile radio 1fi50 is transmitted from the wide area radio base station 17-1 (B.

A transmission method according to the location registration signal transmission method to be transmitted to C, D> is executed. And in this signal, wide area wireless base M
17-1 is a mobile radio device 50 in high-speed movement mode (B, C
, D> is included. Such a measure makes it much easier for the mobile wireless devices 50 (B, C, D) to receive the location registration signal transmission permission signal from the wide area wireless base station 17-1 than usual.

In addition, in transmission and reception in the high-speed movement mode, the mobile radio 50 (B, C, D>
Since it can notify that the person is moving at high speed, it is effective for making/receiving intrusive calls and for switching during calls. For example, even if location registration is completed, the mobile radio 11
150 (B, C.

From D) onwards, the location registration is repeated at time intervals that follow a certain rule, such as every 30 seconds or every minute, so that incoming calls are reliably executed.

Note that the mobile radio device 50 (B, C) is in high-speed movement mode.

D) may suddenly change to low-speed movement -[-do.

A person who gets off the car uses a mobile radio@50 (B, C).

This applies to cases such as carrying D). In this case, the above-mentioned signal transmission for location registration will continue even though the high-speed movement mode has shifted to the low-speed movement mode. In order to prepare for this case, the wide area radio base station 17-1 that has received the location registration signal from the mobile radio device 50 (B, C, D>) transfers it to the gateway exchange 120, and the gateway exchange 20 that received it Then, if it is determined that the location is the same as the previously memorized location registration or that a large movement is not permitted, the mobile radio device 50 (B, C, D) is transferred to the mobile radio device 50 (B, C, D) via the wide area radio base station 17-1, and the mode shifts to low-speed movement mode. The mobile radio a50 (B, In C and D>, by receiving this, it is possible to achieve the same purpose by searching its own ID/roam area information collation storage unit 54 and notifying the gateway exchange 20 of this result. .

No movement 1! ; 1150 (B, C, D), if permission to send a location registration signal is successfully received in low-speed movement mode (S406 YES, 3412 YES).

341BYES>, the mobile radio devices 50 (B, C, D) transmit a location registration signal with their own ID (identification number) using the uplink control channel while in the low-speed movement mode (S443, the 41st figure). Communication using this control channel is possible even in the radio base station 30B shown in FIG. Even when the communication is being used with a network, multiple channels can be chopped at high speed and transmitted and received simultaneously, so communication is always ensured.

Upon receiving the location registration signal (3444), the wireless base station 30-1 inspects the reception quality and stores it in the ID identification storage unit 34.
(3445), and if the reception quality is above a certain value as a result of checking (S446YES), a location registration request signal is sent to the gateway exchange 20 (5
447). Upon receiving this registration request signal (S448), the gateway exchange 20 registers that the reception quality and location are stored in the wireless base station 30-1 (3449).

When this registration work is completed, a registration completion signal is sent (3450). The radio base station 30-1 that has received this registration completion signal uses the downlink control channel to
0 (8, ·C, D> (3451).

Mobile radio 1a50 receives registration completion signal (S452)
(B, C, D) Lt, reception (I wo inspection L) ID (identification number) of the recorded wireless base station 30-1.
Store in the ROHM area information verification storage unit 54 (S453
).

The above operation completes the position registration operation and enters a standby state for arrival [P].

(2) Calling operation Among the calling operations from the mobile radio 150 (B, C, and D), first, the case of low-speed movement mode will be explained.

It is assumed that the mobile radio devices 50 (B, C, D) are powered on and the location registration described in section (1) has been completed. A call is made when a mobile radio 50 (B, C, D) calls another mobile radio in the same system or a telephone accommodated in the telephone network 1o shown in FIG. 1A-1. In the 2003 version, dialing is performed in the same way as making a call from a car phone currently in use.

Now, the user performs a hang-off operation to change the transmission/reception mode of the telephone section 59 of the mobile radio device 50 shown in FIG. 1B. In this state, the mobile radio determines at what timing the calling signal sent from the mobile radio 50 should be sent to the uplink control channel (from the mobile radio 50 to the radio base station 30 (B, C, D, E>). The control unit 58 of the radio device 50 knows that the downlink control channels (radio Base station 30 ([3°C
, D, E) to the mobile radio 50), this mobile radio 5
0 has been captured, and the control signal contained therein recognizes the timing at which the call can be made.

Also, in mobile radio 50, additional functions shown in FIG. 1B are active. In particular, synthesizer 55-1.55-
2. . . , 55-n is made to prepare for finding the local oscillation frequency, but the selector switch 6/I-1 is kept fixed at the position where the synthesizer 55-1 is selected. Further, the control unit 58 sends a control signal to the synthesizer 55-1 to oscillate a locally excavated frequency for receiving the downlink control channel. On the other hand, radio base stations 3C)-1, 30-2, . . . in the vicinity of the mobile radio 1a50
30-n, if there is only one radio device in the radio base station, uplink control transmission from the mobile radio device 50 is sent during the operation depending on whether or not it is communicating with another mobile radio device. I am working hard to receive the issue.

If the wireless base station 30 (B, C, D, E) is communicating with another mobile wireless device at that time, the wireless base station 30
(B, C, D, E) Reception and transmission switching regulations'#
J device 65C, 67C, J and synthesizer 55-1.5
5-2.56-1.56-2 is in operation, and the other 55-1.56-1 outputs the local excavation frequency necessary for communication with other mobile radios, and the synthesizer 55-2 and 56-2 outputs a local excavation frequency that requires communication on the control channel. Therefore, the wireless base station 30 (B
.

Next, the radio base stations 30 (B, C, D, E
), the reception state of the radio reception circuit 68 is controlled by a control circuit.
The channel is fixed in such a way that it is facing up to the receiver. Therefore, the wireless transmitting circuit 66 and the like are inactive, and only the wireless receiving circuit 68 and synthesizer 55-1 are in operation.

Now, under the above conditions, the mobile radio device 50 transmits a call request signal. This call request signal including the ID of the mobile radio device 50 is created by the control unit 58 in FIG. 1B,
The signal is sent to the wireless transmission circuit 66. The radio transmission circuit 66 modulates the signal, and after amplifying it to an appropriate level, the transmission mixer 6
1, the signal is added to the antenna and sent to the wireless base station 30-1, etc.

The radio base station 3o-1, etc. that has successfully received this signal inspects the content of the received signal and sends it to the radio base station 30-1.
When making a call from the mobile radio 50 that has been stored in the ID identification storage unit 34 and whose location registration has been completed, it is confirmed that the reception quality value received at the radio base 830-1 and the empty channel are The number is added and a reply is sent to the mobile radio 50 that made the call, and the mobile radio 1ffi 50 uses the telephone number.
request to determine the channel number. If wireless base station 3
If the mobile radio device that is not stored in the storage unit 34 of 0-1 (for example, a mobile radio device that is moving at high speed and has stopped sending out location registration signals) is >50, it is stored at this point,
This added information is sent back to mobile number #850. However, in this case, the timing of the reply is predetermined in various ways, such as one related to the reception quality as described above, so as not to interfere with replies from other radio base stations.

On the other hand, these surrounding radio base stations 30-1, 30-2.・
..., the mobile radio device 5 that received the response signal from 30-n.
0, the number of radio base stations to which diversity transmission and reception should be performed is determined by considering the call traffic state at that time. In other words, the wireless base stations 30-1, 30-2. −． 30
The content of the response signal from -n is inspected, and if the call quality satisfies a certain standard, the moving direction and speed of the mobile radio device 50, and the diversity transmission/reception provided in the mobile radio device 50 are confirmed. Wireless base stations 30-1.3O-2iB and 30-
Suppose that we decide to communicate with n. In this case, the mobile radio device 50 uses an uplink control channel, and no! ′! The base stations 30-1, 30-2 and 30-n are notified of the communication channel number to be used, and requested to stand by on the channel with the same number.

These radio base stations 30-1, etc. each transmit radio base stations 30-1 to 30-1 at the timing instructed by the control signal.
30-n reports that it is waiting on the designated call channel.

Reports (transmissions) to the mobile radio device 50 from the plurality of radio base stations 30-1 to 30-n described above may be transmitted at the same time. However, in this case, it is necessary to set different occupied frequency bands outside the band and to allow the mobile radio device 50 to identify which radio base station 30 has transmitted the signal.

Here, even if the report to the mobile radio device 50 is made as a control signal at the same time, it will not cause any interference interference at the time of reception. The reason is as follows. In other words, the contents of the signals are almost the same, and the different parts are small parts related to the ID signal of the wireless base station, etc., and the frequency allocation of the control signal for each wireless base station 30 is shown in FIG. (a>). Also, if the above measures are not taken depending on the system, the gateway switch 20 may
From the barrier exchange principle 20, there is a method of shifting the timing of transmitting the control signal by instructing the
The control signal is sent to only one station behind 0, and the radio base station 30 sends an incoming call signal to the mobile radio 50, and the mobile radio 50''r- receives this control signal.
The mobile radio device 5 sends a communication availability signal to multiple wireless bases 830 in the vicinity along with an incoming call response signal.
There are various methods, such as performing the same operation as when calling from 0.

The flow of the calling operation is shown in FIGS. 5A and 5B and will now be explained. However, only one radio base station 30 (30-1> is shown) that communicates with the mobile radio device 50.Gateway exchange 12
0 and the radio base station 30-1 have already started operating, and the mobile radio 50 has also started operating.
The location registration work explained in Figure B has been completed. The handset is off-hook and the uplink control channel (C
I-1> using this off-hook signal and mobile radio [
50 IDs (identification numbers) are sent (3231, fifth
Figure A).

The wireless base station 30-1 that received this transmits the mobile wireless device 50.
, and confirms that the ID is already stored in the ID identification storage section 34 (S232>).

Nothing there! ! The base station 30-1 adds the reception quality value received from the mobile radio 5° and the current empty channel number, and sends it as a call response signal using the downlink control channel (S233>).

The mobile radio that has received such call response signals from a plurality of radio base stations 30 examines the reception quality value from each radio base station 30 and determines whether diversity transmission/reception is possible ('#, n, for example, the radio base Select stations 3o-1 to 3o-3, check for empty channels (3234), and send a signal specifying the communication channel to be used (3235>, t=-c, to radio base station 30-1. : The radio base station 30-1 transmits the channel ↑channel Cl-11.The radio base station 30-1 confirms that the channel specified by the mobile radio 5o is free, and switches to that channel ( 3236>, sends a channel switching completion report using the downlink control channel (3
237). Upon receiving this switching completion report (3238>, the pre-move FJ machine 50 waits for a dial tone on the designated communication channel (S239>).

On the other hand, the radio base station 30-1 sends a calling signal to the gateway exchange 2O (S240). Upon receiving this, the gateway switch 20 inputs the ID of the mobile radio device 50 and the communication quality.
The D identification is stored in the storage unit 24, and the switch group 23, for example 5WI-1, is turned on under the control of the communication path control unit 21 to connect the wireless base #30-1 to the exchange 11 of the telephone network 10 (S241).

Therefore, a dial tone is sent from the exchange 11 side via the switch group 23 of the barrier exchange 20 (S24
2, Figure 5B).

This dial tone is transferred by the radio base station 30-1 via channel CHI (downlink) (S243) and received by the mobile radio 50, confirming that a call has been set up (S244>.Moving The wireless lff 150 sends out a destination dial signal using channel CH1 (upstream) 5245>, and the exchange 11 operates to set up a call path to the destination on the telephone network 10 (5247>. After that, the call is performed (3248>).

When the call is completed, the handset goes on hook (S
249), the on-hook signal and end-of-call signal are sent to the mobile radio 5.
(8) is transmitted using channel CH1 (upstream)
250>. As a result, the radio base station 30-1 confirms the end of the call (5251) and notifies the gateway exchange R20 of the end of the call. Therefore, in the barrier switch 20, the switch 5W of the switch group 23 is
1-1 is turned off and the call ends (S252).

A call originating from the mobile radio 50 in high-speed movement mode will now be described. Mobile radio device 50 (B, C.

D, hereinafter simply referred to as mobile radio 50) has already registered its location with wide area radio base station 17, this mobile radio 50 will send a call signal to wide area radio base station 17 from the beginning. The operation at this time is that of the radio base station 30 (B.

C, D, E (hereinafter simply referred to as radio base stations 30)) is simply replaced with the wide area radio base station 17, so the details will be omitted.

Next, although the location registration is directed to the wireless base station 30 due to some circumstances, the mobile wireless device 50 is moving at high speed and a call is made in this state as shown in FIGS. This will be explained using Figure 51.

The mobile radio device 50 starts operating and communicates with the radio base station 30-1 and the wide area radio base stations 171, 17-2, .
17-3 and barrier switch 20 have already started operating, and the 4th
The location registration explained in FIGS. 8 to 41 has been completed.

The handset of the mobile radio PM 50 is picked up (off-hook), and the off-hook signal and the ID (identification number) of the mobile radio 50 are transmitted using the uplink control channel (Cl-1>) (S501, (FIG. 5C) This mobile radio device 50
Since it does not know that it is moving at high speed, it sends the off-hook signal in normal low-speed movement mode.

Upon receiving the off-hook signal, the radio base station 30-1 detects the ID of the mobile radio 150 and confirms that it is already registered in the IDa-specific storage unit 34 (3502
).

Therefore, the radio base station 30-1 adds the reception quality value and the current empty channel number from the mobile radio 50, and sends it as a call response signal using the downlink control channel (35
03>. At the same time, the radio base station 30-1 checks whether the ID signal from the mobile radio is successfully detected (5504>), and if it cannot be detected successfully (8504NO>), an off-hook signal is sent. The radio base station 3 will wait for the radio base station 3 to be sent again (S505).
The call response signal from 0 is received at a distance of 50 km by the mobile radio (S506>), and if the reception quality is not good or cannot be received at all (3507NO>
, repeat sending the calling signal a specified number of times at predetermined intervals (8508NO1S501-5503,5
506, 5507>.

When the predetermined number of times is reached (8508 YES), the mobile radio device 50 recognizes the high-speed movement mode, gives up communication with the radio base station 30-1, and performs communication with the wide area radio base station 17-1 in the high-speed movement mode. It is decided to transmit and receive call signals using the control channel 5509, FIG. 5D),
Start transmitting and receiving operations on wide area communication channel 11 (8
510>. Therefore, the mobile radio device 50 simultaneously transmits a request for empty channel information and a speed measurement request on the control channel, and waits for reception on the control channel (S511).

The wide area wireless base station 17-1 receives the empty channel information request signal and the speed measurement request signal (S512>), and if it is able to successfully receive both signals (S51
3YES), the wide area wireless base station 17-1 recognizes that the mobile wireless device 50 is moving at high speed, so it notifies the number of an empty communication channel for high-speed movement mode and performs communication using that channel. The mobile radio 50 uses the control channel to send empty channel information instructing it to prepare for a call (5514, FIG. 5E).
0 receives this empty channel information for high-speed movement mode (3515). This empty channel information includes communication channels CH101 and CH102, CH for high-speed movement mode.
This includes that 103 is vacant.

The wide area radio base station 17-1 that has received the speed measurement request measures the speed of the mobile radio 4150, and transmits the speed measurement result and a calling signal to the gateway exchange 20 (3516>).

The barrier switch 20 that received this calling signal and the speed measurement result
Then (3517), if it is determined that it is difficult to measure the speed of the mobile radio device 50 using only the first speed TFT measurement result from this wide area radio base station 17-1, the surrounding wide area radio base station 17
-2. Send a speed measurement request to 17-3 as well (351
8>. Wide area wireless base station 17- which received this speed measurement request
In 2.17-3, the speed measurement is performed 5519), and the result of the measurement is reported to the barrier exchange 20 (3520), and the barrier exchange 20 receives this (Sb21>).

The mobile radio IM50 that received the empty channel information calls the call channel 1J.
5522), the wide area wireless base station 17-1 receives this signal, confirms that the specified channel Cl-1101 is free, and switches to enable transmission and reception using CHlol. (
3523).

When switching to the designated channel is completed at the wide area radio base 817-1, a report thereof is sent out on the downlink control channel (3524, Fig. 5F). Upon receiving this, the mobile radio 50 confirms that the channel switching has been completed, and the dial tone changes to "Kanmon Exchange II!" 120 via the wide area wireless base station 17-1 (8
526).

Transmit speed measurement results to wide area wireless base station 17-1.17-2.1
The barrier switch 20 receives the signal from the wide area wireless base station 17-1.
Determine the speed of each wide area radio base station 17-1゜17-2.
7-2. Speeds V1 and V2 in the direction of 17-3, respectively.
, V3 indicates that it is moving (3527). This information is immediately transmitted to wide area wireless base station 17-1.17-2.
17-3 (S528).

The wide area wireless base station 17-1.17-2.17-3 receives the speed information from the barrier exchange Ia 20 and stores it (3
529.3530>.

When the wide area wireless base station 17-1 sends a channel switching completion report to the mobile wireless device 50, it requests the barrier switch 20 to send a call signal (5531), and the barrier switch 120 that received this request moves. 10 of the radio device 50 is detected,
The communication quality is stored in the ID identification storage unit 24, and the switch group 23, for example 5W1-
18 to connect the wide area wireless base station 17-1 to the exchange 11 of the telephone network 10 (3532).

Therefore, a dial tone is sent from the exchange 11 side via the switch group 23 of the barrier exchange 20 (353
3, Figure 5G).

This dial tone is transferred from the wide iIA wireless base station 171 via channel Cl1101 (downlink) (S5
34), it is received by the mobile radio 50 and confirms that a communication path has been established (8535). Mobile radio 50
sends the destination dial signal to channel CI-+ 101 (
5536>, wide area wireless base station 1
7-1 (3537>), the exchange 11 operates and a communication path to the destination of the telephone m10 is established (3538).The telephone call is then made (S539). The handset is on-hook (S5
40), on-hook signal and end-of-call signal are mobile radio 1ff
i50 using channel CH101 (uplink) (S541>. As a result, wide area wireless base station 17-1
confirms the end of the conversation (5542) and transmits the end of the conversation to the barrier exchange 120. Therefore, in the barrier exchange 20, the switch 5W11B of the switch group 23 is turned off, and the call in the high-speed movement mode is terminated (3543).

The radio base station 30-1 receives an off-hook signal indicating that it is in low-speed movement mode, and successfully detects the ID of the mobile radio 50. 5504 YES, FIG. If received (S507YES)
, the wireless base station 301 adds the reception quality value received from the mobile wireless device 50 and the current empty channel number, and sends it as a call response signal using the downlink control channel while remaining in the low-speed mobile mode (S544, fifth Figure H).

The mobile radio device 5o that receives such a call response signal from the radio base station 3o-1 examines the reception quality value from each radio base station 3o-1, and selects a radio base station that is capable of diversity transmission and reception, for example. Select the stations 30-1 to 30-n, check for empty channels (5545), and send a signal specifying the communication channel to be used (S546>.Here, select the wireless base station 301 (30-2 to 30-n) n is omitted), a signal specifying the channel C1.11 is sent.

The radio base station 30-1 makes sure that the communication channel specified by the mobile radio 50 is free, switches to that channel (S547>, and transmits the channel switching completion report to the downlink control channel. (354B).

Upon receiving this switching completion report (S549), the mobile radio device 50 waits for dial-1 on the designated communication channel (S550>).

On the other hand, the radio base station 30-1 sends a calling signal to the barrier switch 20 (S551). Upon receiving this, the gateway switch 20 inputs the ID of the mobile radio device 50 and the communication quality.
The D identification is stored in the storage unit 24, and the switch group 23, for example 5W1-1, is turned on under the control of the communication path control unit 21 to connect the wireless base station 301 to the exchange 11 of the telephone network 10 (S552).

Therefore, a dial tone is sent from the exchange 11 side via the switch group 23 of the barrier exchange 20 (S55
3, Figure 51).

This dial tone is transferred by the wireless base station 30-1 through channel Cl-11 (downlink) for low-speed mobile mode (S554), and is received by the mobile wireless device 50, indicating that a call has been established. Confirm <3555>. The mobile radio device 50 transmits a full signal using channel CH1 (upstream) 5556 to the destination radio base station 30-1.
(S557), and the exchange 11! ll
11, and a communication route to the destination of telephone number 10 is set (8558). A call is then made (3559
).

When the call is completed, the handset goes on hook (S
560), the on-hook signal and end-of-call signal are mobile radio m5
0 using channel CHI (upstream) (3
561). As a result, the radio base station 30-1 confirms the end of the call (5562) and notifies the gateway exchange 20 of the end of the call. Therefore, in the barrier switch 20, the switch 5W of the switch group 23 is
I-1 is turned off and the call is terminated (3563).

(3) Mobile radio If! Although the present invention has been described with respect to a call originating from 150, the operation of receiving a call to mobile radio 50 when transmitting an incoming call signal using radio base station 30 without using wide area radio base station 17 will be explained below. The flow will be explained using FIGS. 6A, 6B, and 6C. Here, one of the many wireless base stations 30, 30-1, is shown as a representative. For example, a mobile radio device 5 located near a radio base station 30-1, etc.
0 and the like are on standby on a control channel commonly used by all radio base stations 30.

In Figure 1A-1, from the telephone network 10 to the barrier exchange FM20
Assume that an incoming call signal addressed to the mobile radio 50 is received. It is assumed that the ID identification storage unit 24 in the barrier switch 20 inspects incoming call signals and searches for the ID of the called party, and finds the wireless base station 30 (plurality) whose current location is registered. . Then, the mobile radio device 50 simultaneously sends an incoming call signal to all the radio base stations 30 whose locations are registered via the communication control unit 21 (3271, FIG. 6A).

Each radio base station 30 that received this signal
D identification storage unit 34 (C) is searched and I of the mobile radio device 50 is searched.
When confirming that D is stored there, it sends an incoming call and communication channel designation request signal to the mobile radio 50 using the downlink control channel, adding the ID of the radio base station 30-1.

The mobile radio device 50 is called to other radio bases 830 in a similar manner at substantially the same time (S272).

Note that even if the incoming call signal is sent out simultaneously from a plurality of radio base stations 30, mutual interference will not occur when the mobile radio device 50 receives the signal. This is because (a) the contents of the signals are almost the same, and the different parts are small parts such as 10 signals for identifying the wireless base station 30; (b) the 1tlJ control signal given to each wireless base station 30; This is because the frequency arrangement can be varied as shown in FIG. 2 (a>).

In addition, if the above measures cannot be taken depending on the system,
A method of shifting the timing at which the incoming call signal is sent from the barrier switch 20 to each of the radio base stations 30, or a method in which the incoming call signal is sent from the barrier switch 20 to only one of the radio base stations 30. , the radio base station 30 sends an incoming Ilf signal to the mobile radio 50, and the mobile radio 50 that receives this signal communicates with a plurality of nearby radio bases 430 along with an incoming call response signal. There are various methods, such as sending a permission signal and then having the mobile radio 50 perform the same operation as when making a call.

Now, the incoming call signal is received by the mobile radio FM 50 on standby on the control channel, and after searching the received signal quality and signal content and confirming that it is the incoming call signal addressed to the mobile radio 50, (3273) The mobile radio device 50 takes into consideration the nearby call traffic state and selects the radio base station 30-1.
30-2. . . , determines a communication channel that can communicate with the wireless base station 30 using the uplink control channel.
-1.30-2. −． Send to 30-n (3274
).

At the same time, each synthesizer 55-1.55-2 and 56-1.56- in the mobile radio 50 (FIG. 1B)
2. ..., 56-n and selector switch 64-1.64-
2 and reception and transmission switching controllers 65C and 67C, for example, communication channel C)-11 (for wireless base station 30-1), communication channel Cl12 (for wireless base station 3)
0-2),...

The communication channel n (None!!!I for other stations 30-n) is brought into a state where transmission and reception are possible. Each radio base station 30-1 to 30-n that received an uplink control channel from the mobile radio device 50
Now, the quality of the received signal is inspected and the transmitting mobile radio device 5
0 is confirmed (8275), and an incoming call response signal is sent to the barrier switch 20 (3276>).

This incoming call response signal to the gateway exchange 20 also includes a signal to the switch group 23 for setting a communication path. Then, upon receiving this incoming call response signal, the barrier switch 20 will:
It is checked whether the ID of the mobile radio device 50 is already stored in the ID identification storage unit 24, and if it is not stored, the ID is stored in the ID together with the quality inspection data of the radio base station 30-1.
D is registered in the identification storage unit 24 (5277), and a response confirmation signal including the stored ID is sent to the wireless base station 30-1 etc. (3278).

Upon receiving this response confirmation signal, the radio base station 30-1 confirms that the ID of the mobile radio FM 50 has been correctly registered (5279) and checks whether the channel specified by the mobile radio 50 is free. 5280. 6B), and sends the resulting switching approval/disapproval signal to the mobile radio device 50 via the downlink control channel (Fig. 6B).
281>.

If this switching approval/disapproval signal is received (3282), the mobile radio 50 does not allow switching of the specified channel because there are no free channels (8283NO).
, returns to step 5274 and specifies another communication channel (3274). If the specified channel is an empty channel and switching is approved (3283YES)
), switches to that channel, and sends a channel switching completion report using the uplink control channel (3284>).

It was confirmed that the channel was switched to an empty channel (S285
>The wireless base station 30-1 switches to this channel and
A channel switching completion signal is sent to the barrier exchange 120 (3286).

Barrier exchange! When the channel switching completion signal is received at 120, in order to set up a communication path to the telephone network 10 via the exchange 11, the communication path control unit 21 is operated to switch, for example, 5WI-1 of the switch group 23. Turn on and wireless base station 3
0-1 and the telephone network 10 are connected (S287). Therefore, a paging signal is sent from the telephone network 10 via the gateway switch 20 (3288, Fig. 6C), and this is transmitted to the wireless base station 3.
Confirm with 〇-1 (3289). Then, a calling bell signal is sent out on the set communication channel Cl-11, and the mobile radio 50 generates a ringing tone (3291>).

When the handset on the mobile radio 150 side is lifted (off hook) due to this ring tone (3292>, channel C
An off-hook signal is sent by H1, and the wireless base station 30~
1 (S293>, barrier exchange! is received by ff120 (S294>, telephone wJ10 and mobile radio 5
0 (3295).

When the call ends, the handset is put down and the on-hook signal and end-of-call signal are sent to the wireless base station 30 via channel CH1.
~1 (S296>), and the wireless base station 30-1, which has recognized the end of the call by 6°iff, transfers this signal (329
7>. The gateway exchange 20 that receives the on-hook signal and the call termination signal operates the call path control unit 21 and turns off the switch 5W1-1 of the switch u23 to terminate the call (3298
>.

In the above explanation, even in a system in which the control transceiver installed in the radio base station 30-1 is diverted to a communication channel, the transmission and reception channels are repeatedly switched from time to time as explained in the configuration of the mobile radio device. The method makes it possible to communicate with a newly called mobile radio using the control channel even if it is already in communication with a third mobile radio (see FIG. 1E).

In the systems exemplified in (2) call operation and (3) shield call operation, which have already been explained, the wireless channels are clearly separated into a wireless channel dedicated to control and a wireless channel dedicated to calls. However, in some actual systems, this distinction is not clear. In such systems, it is possible to treat a specific communication channel as the control channel described above and perform the same operation.

Next, before moving at high speed within the service area! i!
; The operation when there is an incoming call to one aircraft 50 (on standby) will be explained.

First, when a call arrives when the mobile radio 50 is in high-speed movement mode and the location is registered in a wide area and V-line base area 17,
This is similar to the incoming call in the low-speed movement mode already explained in FIGS. 68 to 6C. In other words, wide area wireless base station 17
It is sufficient to replace the radio base station 30 with the radio base station 30 and perform the call receiving operation.

Next, an explanation will be given of an incoming call when, for some reason, the mobile radio device 50 is moving at high speed (high speed movement mode) but its location is registered with the radio base station 30. An example of this is actually a case where a person who is walking and carrying the mobile radio device 50 gets into a car and starts driving when an incoming call is received. The flow of operation in this case will be explained with reference to FIGS. 6D to 6.

The barrier switch 20 receives the incoming call signal from the telephone network 10 (
S601, FIG. 6D), searches the ID identification storage unit 24,
After confirming that the called party is within the mobile communication network (3)
If the mobile radio device 50 is in the high-speed movement mode (3603No>, the mobile radio device 50 is already connected to the radio base station 30-1 (30-1~ 30-n), the gateway exchange 20 transmits an incoming call signal to the wireless base station 30-1, etc. (S604).

In response to this, when the radio base station 30-1 etc. confirms that the incoming call signal is addressed to itself using the ID (S605), it adds 10 of the radio base station 30-1 to the mobile radio device 50 and sends it to the control channel. (CH) to transmit an incoming call signal (S
606).

The mobile radio 1150 was unable to receive the incoming call signal from the radio base Ja30-1 well (
S607, 3608 NO), and wireless base station 30-1
etc., does not receive an incoming call response from the mobile radio device 50 after a predetermined period of time (8609 NO>), repeats the sending of the incoming call signal and reception by the mobile radio device 50 until reaching a predetermined number of times. (3610, 8611, Figure 6E).

When the number of incoming call signals sent reaches the specified number of times (S610YE)
S, S611YES), in wireless base station 30-1, etc.
It is determined that the mobile radio device 50 is outside the service zone of the radio base station 30-1 or the like or is moving at high speed,
The gateway exchange 20 is informed that the call receiving method for high-speed movement mode should be adopted (3612).

As a result of receiving and analyzing information from the radio base station 30-1 etc. that indicates that the mobile radio device 50 is moving at high speed, the Kanmon Traffic Control Station 20 determines that the mobile radio device 50 is moving at high speed. and determines the use of high-speed movement mode (3613
). The ID identification storage unit 24 is searched to confirm whether the mobile radio device 50 has registered its location in the high-speed movement mode, and which wide area is in charge of communication in the high-speed movement mode? 3;1 base station 17
If the current location cannot be estimated because the location has not been registered in ba(3615NO
> If the caller is a VIP (5616), and the caller is a VIP (
3615 YES), an incoming call signal is sent through all wide area wireless bases 817 (3617).

The mobile radio 50 is confirmed to be in high-speed movement mode (S
603YES), or if it was possible to estimate the location registration after deciding on high-speed movement mode (3614YES)
S) The gateway switch 20 estimates that the current location of the mobile radio device 50 is in the service area of the wide area radio base station 17-1.
The incoming call signal is sent to the wide area wireless base station 17-1 with the following (3619).

Wide area wireless base station 17 that received this request to send out an incoming call signal
-1, an incoming call signal and free channel information in high-speed movement mode are transmitted to the mobile radio device 50 (3623).

This incoming call signal is determined to be moving at high speed, and is received by the mobile radio 150 in standby after changing to the wide area incoming call standby control channel for high-speed movement mode (S622°5623), and the quality of the received signal and The contents of the signal are searched, and it is considered whether the incoming call signal is good or not (S624), and the mobile vJ radio 5
After confirming that it is an incoming call signal addressed to 0, (3625,
6G), the mobile radio device 50 determines a communication channel, for example, Cl-1101, with which it can communicate with the wide area radio base station 17-1, taking into consideration the nearby communication traffic state, and performs uplink control. It is transmitted to the wide-Vi wireless base station 17-1 using the channel (3626). At the same time, mobile radio 1
150 (Figure 1B) each synthesizer 55-1.55
-2 and 56-1.56-2. ... 56-n, the changeover switches 64-1, 64-2, and the reception and transmission switching controllers 65C and 67C are operated to enter a state in which transmission and reception are possible, for example, on the communication channel CH101 (for wide area wireless base Jm171). Have them prepare. Wide area radio base station 17 that received the uplink control channel A channel from the mobile radio 150
-1, the quality of the received signal is inspected, the ID of the mobile radio device 50 that made the call is confirmed (S627), and a call response signal is sent to the gateway exchange 20 (S628).

This incoming call response signal to the gateway exchange 20 also includes a signal to the switch group 23 for setting a communication path. Then, upon receiving this incoming call response signal, the barrier switch 20 will:
Reconfirm whether the ID of the mobile radio device 50 is already stored in the ID identification storage unit 24. Normally, it is stored, but if it is not stored, the wide area radio base station 17- ID identification storage unit 2 along with the quality inspection data of 1.
4, and sends a response confirmation signal including the stored ID etc. to the wide area wireless base station 17-1 (S630).

Upon receiving this response confirmation signal (3631, the wide area radio base station 17-1 confirms that the ID of the mobile radio 150 has been correctly registered), it checks whether the channel specified by the mobile radio 50 is free or not. is confirmed and a switching confirmation signal is sent to the mobile radio device 50 on the downlink control channel (3632).
.

A switching confirmation signal to this designated channel was received (863
3) In the mobile radio device 50, if switching of the specified channel is not permitted because there is no free channel, (
3634 NO>, the process returns to step 8626 and specifies another communication channel (S626). If the designated channel 17, for example CHlol, is an empty channel and switching is approved (S634 YES), the channel is switched to that channel and a channel switching completion report is sent using the uplink control channel (S635).

After confirming that the wide area wireless base station 17-1 has switched to a vacant channel (3), it switches to this channel and sends a channel switching completion signal to the barrier switch 20 (8
636).

When the barrier switch 20 receives the channel switching completion signal, it operates the call path control unit 21 and switches the switch group 23 in order to set up a call path to the telephone network 10 via the switch 11.
5W1-18 of the wide area wireless base station 17-1.
and the telephone network 10, and a call signal is sent out from the telephone network 10 side via the gateway switch 20 (8638, Fig. 6F1), which is sent to the wide area wireless base station 17-1. (3639).Then, the calling bell signal is set to the communication channel C1-I for the high-speed movement mode.
101 Send (3640), +? Motion miH! 5
0, a ring tone is generated (S641).

When the handset on the mobile radio □50 side is lifted (off hook) by this ring tone (3642), channel C
An off-hook signal is sent by l-1101, transferred by wide area wireless base station 17-1 (S643), received by barrier switch 20 (S644), and transmitted between telephone network 10 and mobile wireless device 50. A call is started (S645).

When the call ends, the handset is put down, an on-hook signal and a call end signal are sent to the wide area wireless base station 17-1 via channel C1-1101 (3646), and the wide area wireless base station 17-1 confirms the end of the call. Now, let's forward this signal (
S647). The gateway exchange 20 that receives the on-hook signal and the call termination signal operates the call path control unit 21 and turns off 5WI-IB of the switch group 23 to terminate the call (
8648).

If the mobile radio device 50 is in a low-speed moving position and the radio base station 30-1 etc. successfully receives a call response signal from the mobile radio device 50 (S609YES, FIG. 6D), or the radio base station If the mobile radio 150 successfully receives an incoming call signal from 30-1 etc. in low speed movement mode (360B
YES (FIG. 6D), after searching the received signal quality and signal content and confirming that it is an incoming call signal addressed to the mobile radio device 50, the mobile V-line device 50 checks the nearby call traffic state. In consideration, a low-speed movement mode communication tunnel that can communicate with the wireless base station 30-1, etc. is determined, and the communication is transmitted to the wireless base station 30-1, etc. using the uplink control channel (S649
).

At the same time, each synthesizer 55-1.55-2 and 56-1.56- in the mobile radio 50 (FIG. 1B)
2.56-3, changeover switch 64-1.64-2, and reception and transmission switching controllers 65C and 67C are operated, for example, communication channel C)-11 (radio base station 30-
1) to enable sending and receiving. mobile radio 5
Radio base station 30- which received the uplink control channel from
In the first class, the quality of the received signal is inspected, the ID of the mobile radio device 50 that made the call is confirmed (3650), and an incoming call response signal is sent to the gateway exchange 20 (3651).

This incoming call response signal to the gateway exchange 20 also includes a signal to the switch group 23 for setting a communication path. Then, upon receiving this incoming call response signal, the barrier switch 20 will:
It is checked whether the ID of the mobile radio device 50 is already stored in the ID identification storage unit 24, and if it is not stored, the ID is stored in the ID together with the quality inspection data of the radio base station 30-1.
The ID is registered in the D identification storage unit 24 (5652), and a response confirmation signal including the stored ID is sent to the wireless base station 301 etc. (3653).

In the wireless base station 30-1 etc. that received this response confirmation signal,
Check that the ID of the mobile radio 50 has been correctly registered (5654), check whether the channel specified by the mobile radio 50 is free and consider whether or not to switch 5655 (Fig. 6J), The resulting switching approval/disapproval signal is sent to the mobile radio 5 on the downlink control channel for low-speed movement mode.
0 (S656).

When the mobile radio device 50 receives this switching approval/disapproval signal (3657) and does not approve switching of the specified channel because there are no free channels, (8658 NO)
, returns to step 3649 (Fig. 6) and specifies another communication channel (S649). If the specified channel is a free channel and switching is permitted, (
3658 YES (FIG. 6J), the channel is switched to that channel and a channel switching completion report is sent using the uplink control channel for low-speed movement mode (3659).

Confirmed that the channel was switched to a free channel (8660
) At the wireless base 830-1, switch to this channel and
A channel switching completion signal is sent to the barrier exchange 'a20 (8661).

When the barrier exchange 1120 receives the channel switching completion signal, it operates the communication path control unit 21 and switches 5W1-1 etc. of the switch group 23 in order to set up a communication path to the telephone network 10 via the exchange 11. Turn on the wireless base station 30-1
etc. and the telephone network 10 (8662). Therefore, a calling signal is sent from the telephone WJ10 side via the gateway switch 20 (8663, shown in the sixth figure), and this is sent to the wireless base station 30.
-1, etc. (S664>. Then, a ringing bell signal is sent on the set communication channel C for the low-speed movement mode 11, and a ringing tone is generated in the mobile radio 50 (3666
).

When the handset on the mobile radio 50 side is lifted (off hook) due to this ring tone (3667), channel C
An off-hook signal is sent by H1, and the wireless base station 30-
1st class (866B>), is received by the barrier exchange 11[20 (S669), and is transferred to the telephone network 10 and the mobile radio 50.
A call is initiated between the two parties (8670).

When the call ends, the handset is put down and the on-hook signal and end-of-call signal are sent to the wireless base station 30 via channel CH1.
-1 etc. (3671), and the wireless base station 30-1 etc. that confirms the end of the call transfers this signal (3672).

Upon receiving the on-hook signal and the call termination signal, the barrier switch 20 operates the call path control unit 21 and turns off SW1 to SW1 of the switch group 23 to terminate the call (S673).

In the above explanation, even in a system in which a control transceiver installed in the radio base station 30-1 etc. is diverted to a communication channel, the transmission and reception channels are repeatedly switched over time as explained in the configuration of the mobile radio device. The method makes it possible to communicate with a newly called mobile radio using the control channel even if it is already in communication with a third mobile radio (see FIG. 1D).

Note that the mobile radio 50 (B.

C, D> may change from high-speed movement mode to low-speed movement mode. As a countermeasure in this case, it is possible to adopt either a method of maintaining the high-speed movement mode only for the call, or a method of detecting the speed and shifting to the low-speed movement mode. In the former case, no particular explanation will be given as a system technology, but in the latter case, a technique for switching channels during a call, which will be described below, will be used.

(4) Application of diversity during low traffic times Due to the calling/receiving operations described in sections (2) and (3), the communication between general telephone A and mobile radio Ml in the telephone network 10
50 (or between two mobile radios in the system).

In this case, the number of radio base stations 30 with which the mobile radio device 50 communicates is 1.
and the communication traffic state within the system, at least the traffic state of 1 to 3 in the vicinity of the mobile radio device 50, is assumed to be not the busy hour (the number of radio base stations 30 is 2 or more). ).

Then, the mobile radio device 50 starts preparing to perform diversity transmission and reception. Therefore, the control section 58 in the mobile radio device 50 shown in FIG. In addition to -1 and 56-1, frequency oscillation is requested to synthesizers 55-n and 56-n so that control channel CH30 can be transmitted and received. At the same time, the control unit 58 starts sending control signals to the wireless transmission circuit 66. This control signal includes the ID of the mobile radio device 50.

It includes the type of communication (@type of voice, data, etc.) and the channel number currently in use, and requests surrounding wireless base stations 30 that are not currently communicating to start a diversity transmission/reception operation. However, the above conditions for the radio base station 30 are such that if the radio base station 30 has a configuration as shown in FIG. 1E, FIG. 1F, first diagram, and FIG. 1L, This condition can be relaxed because it is possible to talk to a new mobile radio even if the user is currently communicating with a third party's mobile radio.

With the above operation, the transmission mixer 61 of the mobile radio 150
In addition to the channel CH1 currently in communication, the output of the control channel CH30 can be obtained, and the reception mixer 63 can also receive the control channel in addition to receiving the communication channel CI-11 currently in use. become. This is explained in detail in the operation of channel switching during a call in section (5).

The control signal transmitted from the mobile radio device 50 is sent to a plurality of nearby radio base stations 30-2, 30-3.・
..., 30-n. Then, one of the radio bases, #30-2, inspects the quality of the received signal and the content of the signal, and finds that the quality of the signal received from the mobile radio device 50 is above a certain value, and it immediately starts communication. If it is determined that there is no deterioration in quality and there is no possibility of interference, the transmitting mobile radio 50 is
ID of base station 30-2, available wireless channel number (
For example, a control signal including CH2> etc. is transmitted to the mobile radio device 50 to report that diversity transmission/reception is possible.

This signal is received by the radio receiving circuit 68 of the mobile radio device 50 and transmitted to the control section 58. The control unit 5 that received this
In step 8, as a result of examining the signal sent from the radio base station 30-2, it is determined that it is appropriate to perform diversity transmission and reception, and the signal is sent to the synthesizers 55-2 and 56-2 on the digital channel CH2. In order to start communication with the wireless base station 30-2, generation of a local oscillation frequency is requested.

In addition, to the radio base station 1430-2, the switch group 23 is operated to send the call signal currently being communicated to the radio base station 30-2 in parallel to the call path control unit 21 in the barrier switch 20. request.

Upon receiving this request, the gateway switch 20 sends the wireless base station 30
In accordance with the request of -2, audio signals, that is, audio signals from general telephones, are transmitted not only to the wireless base station 30-1 but also to the wireless base station 30-1.
Start sending the same signal to -2.

The base station 30-2 that received this voice signal adds the ID of the other station 30-2 to the 15iJ machine 50 before the movement, and sends it out on the radio channel CH2. On the other hand, since the mobile radio device 50 is ready to receive the radio channel C)-12, the radio receiving circuit 68 that received this signal
After the output is inspected by the communication quality monitoring section 57, if the quality is good, the voice signal is transmitted to the telephone section 59, and the control signal is transmitted to the control section 58.

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

Above) The diversity transmission/reception execution request signal transmitted from the mobile radio device 50 to the radio base station 30 in the vicinity is transmitted to the radio station 30-3 other than the radio base station 30-2.
．． 30-4. −． 30-n receives the same response signal, and a radio base station suitable for these conditions should transmit a response signal similar to that of 30-1 to the mobile radio device 50.

Therefore, in the control unit 58 of the mobile radio device 50 or the gateway exchange 20, when it is desired to perform diversity transmission and reception with a large number of radio base stations, When the same operations as those for diversity transmission and reception are performed and all operations work normally, diversity transmission and reception is started with, for example, the radio base station 30-3.

Hereinafter, by the same operation as above, the radio base station 30- which is closest to the mobile radio device 50, is not currently in communication, and whose communication quality satisfies a certain standard required for the system or higher.
3.30-4. . . , 30-n, diversity transmission and reception is similarly started. The multiplicity of diversity is the number of wireless base stations 30 that can communicate or the number of multiplicities that can be simultaneously transmitted and received in the mobile radio device 50, that is, in the case of FIG. 1B, the synthesizer 55
-1 to 55-n or 56-1 to 56-n.

In addition, in the above explanation, it is assumed that the call traffic in the system is not busy, but the traffic condition (the length is measured at each wireless base station 30 or mobile wireless device 50,
When traffic gradually increases, restrictions are added on the degree of multiplicity of diversity, and at peak times,
The state will shift to a state where the multiplicity is 1, that is, there is no diversity. However, by differentiating the reduction of multiplicity depending on the type of communication being carried out (voice, data, facsimile, etc.), it becomes possible to perform systematic processing such as making broadband communication less susceptible to multiplicity restrictions. ,
The present invention has features such as being able to ensure good communication regardless of the type of communication.

Although the above is a case of the mobile radio device 50 in the low-speed movement mode, the same diversity as described above can be applied also in the high-speed movement mode.

In other words, one mobile wireless IJ device 50 constitutes one wide area wireless base station 1.
7, and if the call traffic is normal, it is possible to communicate with other wide area wireless base stations 17 in the vicinity.

(5) Explanation and theoretical basis for channel switching during a call and the diversity effect n-1 radio base stations 30 and one mobile radio device 50 are communicating using n-1 channels. During the process, if the quality of communication in one of the channels falls below a certain value, one wireless base station 30 that satisfies the certain communication quality and is not currently communicating with another Before switching to one channel (?/i channel) and communicating, the switching receiving means and the switching transmitting means are switched at a speed that does not affect the communication signal, and the n
- If the old channel and the new channel other than the two channels are temporarily sent and received in parallel, and the quality of the new channel is checked during that time and it is confirmed that it is above a certain level, the operation for channel switching will be performed. , and communicated via n-1 wireless channels including the new channel. Therefore, instantaneous communication interruptions due to channel switching are no longer caused. In addition, it is now possible to obtain transmitting and receiving diversity effects even when channel switching is not performed.

FIGS. 1A-1 to 1N show system configurations for explaining an example of this operation.

This will be explained below with reference to these figures.

The mobile radio device 50 (B, C, D) (hereinafter simply abbreviated as 50) has a synthesizer 55-1.55-2°..., 5
5-(n-1>, wireless receiving circuit 68, and wireless transmitting circuit 66
Wireless base stations 30-1, 30-2. −． 30-
(n-1> and communication channel CH1, C)-12, ·, C
1l (n-1>). It is assumed that the mobile radio [50] moves away from the radio base station 30-1 and approaches the radio base station 30-n. Then, the mobile radio [50]
As the relative distance between the wireless base station 30-1 and
Detection has dropped below (cover). Note that even the level L1 is set so that the line exceeds the required value.

The mobile radio 50 requests all radio base stations 30 in the vicinity to measure the quality of the signals transmitted by the mobile radio 50. Now mobile radio in response to this request! Each radio base station 30 that is not communicating with the mobile radio v350 reports the measured value to the mobile radio v350.

In this case, the signals transmitted from the transmitting antenna of the own mobile radio 150 are transmitted from the radio base stations 30-1, 30-2, .・
, 30-(n-1>) While continuously transmitting a call signal addressed to
to base station 30-1.) via the control channel (CH5O).
30-2. ..., 3O-(n-1>) If the reception condition is good for the surrounding radio base station (for example, 3O-n), the downlink (from the radio base station 30 to the mobile radio a50) control channel (C) -150> to request a response.

The contents of the control signal sent from the mobile radio device 50 include the signals shown below.

i) ID of mobile radio device 50.

ii) Currently communicating with other party's radio base #30-1.30
-2. −． 30- (n-1> ID and receiving crystalloid.

111) Channel number currently in use.

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

V) Service type.

A control signal including such content is received by a plurality of nearby wireless base stations 30.

In other words, when these radio base stations 30 are on standby, unless they are communicating with another mobile radio, they are waiting for reception on a control channel determined by each system (for example, CI-150>). The quality of the communication is inspected by the communication quality monitoring unit 36 installed in each radio base station 30 that receives this, and if the quality is above a certain level, the other party's movement is confirmed. The ID of the radio device 50 is stored in the ID identification storage section 34 in the radio base station 30, and is notified to the control section 38.The contents of this notification include the following.

a) ID of the mobile radio device 50 that sent the message.

b) The partner radio base station 30-1, 30-2, with which the mobile radio device 50 is currently communicating.・=, 30- (n-1)
(Do C) Channel number in use.

d> Type of communication.

e) Reception conditions (S/N or C/N (chitria-to-noise ratio) or average hit error rate in the case of digital signals).

``) 4 Nobis types.

Upon receiving this signal, the control unit 38 inspects the contents and
Searches for a communicable empty channel stored in its own wireless base station 30-n. As a result, if the mobile radio device 50 determines that there is an empty channel that satisfies the type of service desired and that the required communication quality can be secured for a certain period of time even after channel switching, the mobile radio device 50 3
It is decided to notify the mobile radio device 50 of the reception status from 0-n. To do this, first, the communication path control unit 21 of the gateway exchange 20 is asked to identify its own ID, the ID of the mobile radio 150 that sent the data, and the radio base station 3 of the other party with which it is communicating.
0-1.30-2. ..., 30- (n-1> ID
etc., and the switches 5W1-1 .
1-2.1-n are turned on at the same time, and the radio base stations 30-1, 30-2.
..., 3O-(n-1> (hereinafter abbreviated as 30-1, etc.) requests the transmission of the same call signal. However, as will be explained later, this operation depends on the signal used in the wireless transmission path. It can be omitted if the modulation format is an amplitude modulated wave or shallow frequency modulation.

Next, the wireless base station 30-1 for the wireless base station 30-n
Regarding the timing of transmitting a call signal in response to a request for transmitting the same call signal as above, when a location registration request or a call is made from the mobile radio device 50 described above, response signals are sent from a plurality of nearby radio bases E30. Adopt the same method with different timings. The reason for taking this timing is to prevent interference caused by simultaneous transmission of control signals with other radio base stations 30, and to ensure that the mobile radio device 50 receiving the control signal is connected to a radio base station 30 with good reception status. -n
This is to make it easier to select a radio base station 30 that satisfies the communication desired conditions of the mobile radio device 50.

Now, the signal transmitted from the radio base station 30-n to the mobile radio device 50 includes the following contents.

11 Call signal: Downlink call signal obtained from the barrier switch 20 (from a telephone in the telephone network 10 to the mobile radio 50).

This transfers the mobile radio 81 from the current radio base station 30-1 etc.
It is exactly the same as the call signal being transmitted to 50. Furthermore, the modulation level of the signal wave performed by the modulator included in the transmitter 31 of the wireless base station 30-n is also set to be the same as that of the wireless base station 30-1 and the like.

2] Control signal: This includes the following signals.

2-1) ID of mobile radio device 50 received by own radio base station 30-n.

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

2-3) A communication channel number that can be used by the own radio base station 30-n (without interference) and matches the service distinction and type of communication.

2-4) Reception status (reception C/N value, etc.).

The control signal containing such information transmitted by the wireless base station 30-n is received by the mobile wireless device 50.

In this way, the control unit 5 of the mobile radio 150 receives 1q of information such as the C/N value sent from each radio base station 30-n, etc.
In 8, suppose that when these multiple pieces of information are compared, it is confirmed that the measurement result of the wireless base station 30-n has the best value, and that the quality standard level is 2 or higher, but satisfies L2>Ll. , the mobile radio device 50 is connected to the radio base station 30
- It is determined that the communication zone (zone n) of zone n has been approached, and after channel switching, the wireless base station As informed by the station 30-n, it is learned that channel CHn is available. Therefore, using the uplink control channel, the wireless base station 30-
n to perform transmission and reception on channel CI-1n, and also instructs switch 5W1-1 and 5W1-2.3W1- (n -1) In addition to 5W1-“
) are turned on at the same time, and also for the wireless base station 30-n, the wireless base stations 30-1, 30-2°..., 30-
(n-1>) requests to start transmitting the same call signal.

In the barrier exchange t120 in response to these requests, 5W1-nb of the switch group 23 is turned on, and the wireless base station 30 is turned on.
-n starts transmitting a voice signal using communication channel n. In this case, it goes without saying that the modulation depth of the modulator of the radio base station is also different from that of the other radio base stations 30-2, 30-3. −． 3
Same as 0-n.

In order to realize the transmission of this control signal, specifically, when the control signal is an analog signal, as shown in FIG.
Low frequency f outside 0KH2. .

(e.g. about 100H2) or high frequency f, 1°f
, 2. f, 3-f oa (ta,!: for example 3.8
8 waves from KH1 to 4.5KHz at intervals of 0°1K)-I2@ (when n-f3) are used.

When there are many items to be controlled, that is, control data, the wave number of the control frequency fDO" fD8 may be increased roughly, or a subcarrier format may be used. In this case, for example, f... to fD8. By applying frequency modulation or amplitude modulation to one or more of the waves, more control data can be transmitted.

Furthermore, when a digital data signal is used as the control signal, it is also possible to digitally encode the audio signal and time-division multiplex the two to be transmitted. Do as shown below.

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

In FIG. 3 explaining the channel switching operation, the wireless base station 30-1 and the channel switching operation are shown. The radio base station 30-1 or the mobile radio 50 indicates that the quality of the channel C111 used with the radio 50 has decreased to level 1 or below.
communication quality monitoring unit 37. 57 detects it, and by the process described above, the wireless base station 30-
Start preparations to make it possible to receive radio waves transmitted from n in parallel.

In other words, the control unit 58 of the mobile radio device 50 has previously controlled the synthesizer 55 1155 2 m'', @ 55-(
n-1), the transmission wave of the radio base station 30-1 on channel CH1: Jl:, the transmission wave of the radio base station 30-2 on channel CH2, . . ., channel CI-
From the state in which the transmission wave of the radio base station 30- (n-1>) is being received by the radio base station 1n-1, the synthesizer 55-n is also activated to receive the transmission wave of the channel CHn transmitted from the radio base station 30-n. The synthesizer 55-n is made to generate a frequency that can be received.

Thus, when communication with the wireless base 830-1 is about to be stopped due to the quality deterioration of the channel CH1 being transmitted from the @FA base station 830-1, the wireless base station 30
-n and Ditonel C)-I n begin communication.

In other words, move! The Pl non-FiA device 5CH' continues to repeatedly switch the changeover switch 64-1, which receives the changeover drive input signal from the reception changeover controller 65C.

At the same time, the synthesizer 56-1゜56-
2. ..., 56-(n-1>) to operate the radio base station 30- using channels CH1 to C)-1n-1.
1 to 30- (n-1>), the synthesizer 55-n is also operated, and the state is changed to a state where it can transmit to the wireless base station 30-n using channel CHn. This transmission Synthesizer 56 used for
-1.56-2...56-n are repeatedly switched by the changeover switch 64-2 using the switching drive input signal from the transmission switching control 1367C.

During this switching transmission/reception period in which channels Cl-11 and CH2, . . .
This continues until the mobile radio device 50 confirms that the above is the case, and then the channel CH1 is released and the radio base station 30
-2.30-3. ..., 30-n and the mobile radio 150 are transmitted through channels CH2, CH3,... CH
The process continues without interruption due to n.

The switching frequency f1 of the changeover switches 64-1 and 64-2 during this switching transmission/reception period is set to, for example, 2n times or more the highest frequency included in the signal. This will be explained in detail below.

The optimum value of the switching frequency is determined by considering the following conditions.

1) Modulation format of the signal to be transmitted 2) Signal frequency band to be transmitted 3) Control frequency band to be transmitted 4) Band characteristics of the transmitter/receiver section, especially the band characteristics of the high frequency wave generator installed at the antenna input end 5 ) Waveform characteristics of the switching controller 6) Response characteristics of the frequency synthesizer 7) Carrier frequency and number of channels used in the system 8) Radio wave propagation characteristics of the transmission path 9) From the gateway switch 20 to the wireless base station 30-1 The difference in transmission delay time due to the difference between the signal transmission path to the mobile radio device 50 and the signal transmission path from the barrier switch 20 to the mobile radio device 50 via the radio base station 30-2, for example, 1)
is frequency modulation, and 2) is 0.3 to 3.0K if it is an audio signal.
When using the out-of-band control signal shown in Fig. 2(a) as Hz, 3), it is less than 0.3KH2 (f,.)
, or 3.8-4.5KH2 (f, 1.f02.-f
, 8). 4) As a characteristic, the passband width is 16K.
H2 (or 8KHz), the characteristics of 5) should be selected keeping in mind that the response characteristics of the synthesizer in 6) are good and the output waveform is good, and the synthesizer used is for switching in 5). Immediately rapid response characteristics are desired depending on the input of the controller.

Items 7) to 9) are items to be considered from the system design perspective. In the car phone system described as an embodiment of the present invention, item 7) is 900 MHz and 600 channels, so the frequency bandwidth used is 15 MHz (or , 120
0 channel same 15 MHz>, 8) is known in many documents, and 9) is about 0.03 msec.

Taking the above into consideration, for example, in a car telephone system, the switching frequency of the changeover switch 64-2 of the mobile radio 50 is selected to be approximately 20XnMHz.

The case of reception will be explained below.

As shown in Figure 2(b), if the audio signal or control signal is digitized, the switching frequency is
It is appropriate to use a faster frequency, nX20KHz
A value of about 30 KH2 may be sufficient.

Also, the channel Ct- as seen from the input section of the reception mixer 63
11, 2, 3, -, n-1, n carrier wave frequency is ω1.
ω2. ..., ω. −1, ω. , also synthesizer 55
-1.55-2. ..., 55- (n-1>55-
Let the output frequencies of n be ω, 1 . ω, 2ωLn 10ω
Ln, the wireless base stations 30-1, 30-2-. 30
- (n-1), the frequency of the carrier wave at the output of the intermediate frequency amplifier included in the receiving microphone + J63 from 30-n is Ω1-ω1-ω[1(11) Ω2-ω2-ωL2 Ωn-1= '')n-1-'')Ln-1 Ω = ω -ω[n n In other words, as the changeover switch 64-1 intermediate frequency, the receiving section 53 has 1,1) (1n) Due to the operation Ωn-1=″n-1-″)Ln-1 Ω=ω −ω[.

Signal waves having carrier frequencies such as n are sequentially input. And (11) and (12)...Equation (1) is 01''5Ω2S...ReflectionΩ.-1=Ω. (2>
There is a relationship between Such a signal is amplified in the receiving section and then demodulated in the demodulation circuit, but there is a frequency difference between the n intermediate frequencies ω1-"J11 ω2-L2 n-I Ln-1 ωn-"S exists, the demodulated output signal will have
There are cases where distortion noise occurs and cases where it does not. In other words, in the case of frequency modulation or phase modulation, distortion noise will not occur if there is no frequency difference at all, but if there is a frequency difference and the frequency difference (beat frequency) contains the same component as the signal frequency, distortion noise will occur. However, if it is not included, it will not occur.

On the other hand, in the case of amplitude modulation, no distortion noise occurs even if there is a frequency difference. However, even in the case of amplitude modulation, if an intermediate frequency amplifier or the like has nonlinear characteristics, nonlinear distortion will occur due to harmonics, so it is necessary to use an amplifier with good linearity.

Reception mixer 63 of mobile radio device 50 as described above
CHl, CH2,-,0Hn-1 and CHn at the input of
There is no abnormality in communication even if the local oscillation frequency of Explain something theoretically.

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

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

In addition, the control signal that exists outside the band is: where a・ is the amplitude difference, ω1 is the angular frequency of the signal,
θi represents the phase when 1-0. m.

``) represents a positive integer.

Next, the case of frequency modulation will be explained, but the present invention is similarly applicable to phase modulation. When the carrier wave is frequency modulated using equation (3) or equations (3) and (4), the resulting modulated wave is: 1=IoSinf(ω+μ(t)) d t=tos
in(ωt+5(1)) (5) or 1=I□ sin f(ω10μ(1)10μ.(t)
)dt=I□5in(ωt+5(1)+5C(t))
(5' 〉 However, as a result, the expression S (t
) 10S. (1) will represent a general form of transmission signal.

Now, using equation (5) or (5'), radio base stations 30-1, 30-2. −． 30- (n-1), 30-
The signal transmitted from the mobile radio 1150 is input to the reception mixer 63 via the antenna of the mobile radio 1150, and the signal transmitted from the local oscillation frequency (
In the case of FIG. 1B, sincerelyizer 55-1.55-2.
..., 55-(n-1)55-n>, when mixed with
The input to the receiving unit 53 can be expressed as in the following equation using the same symbols as in equations (1) and (2). (However, the changeover switch 64-1 is in a stopped state).

1- =I□HSIn (ΩHt+5(t) +ScH
(t))■ (r=1.2...,n) Next, assume that the changeover switch 64-1 starts the changeover operation. In addition, -1, 2, ... to the radio base station 3o-+
, n), the voice signal @sm and the control signal 5Ci(t) are
1=(I O,/n> [1+2
:yo11(n/m π)xsin (mπ/n)co
smpt]xsin (Ω t+5(t)+5o1(t
) >+ ((02/ n > [1+ 2 , Fl(
n/mπ)) xsin (mπ/n> xcos mp (t-2yr/ (np>) ] x
sin (Ω2i+5(1)+5o2(t))+(I
03/n) [1+2Σ m=1 (n/mπ)) xsin (mrr/n) xcos mp (t-4yr/ (np)) ]x
sin (Ω3t + s (t) + S o3(t
) ) ten... + (10n/n> [1+2Σ(n/mπ)) m;1 xsin (mrr/n) xcos mp (t -2(n-1) yr/ (n
p) ) ]xs+n (Ω.t+5(t) +5C
o(t)) However, p is the switching angular frequency, m is a positive odd number, and the switching times for n input waves are set at equal intervals.

When the right side of equation (7) is transformed, it becomes the following equation.

I= (I01/n) [sin (Ω1j+U1
(t))+(n/π) sin(π/n> x[cos((Ω1-p)t+U1 (j))-cos
((Ω1 +p) t + Ul (t) ) ]+(
n/3π) sin (3π/n> x[cos((Ω,-3p)t+U1(t))-cos
((Ω1+3p)t+U1 (t)) ]+(n15π
) sin (5π/n) x [cos ((Ω1-5p)
t+U1m)-cos((Ω1+5p)t+U1
(j)) ]+ −−−−−−] +(102/rl) [sin (Ω2 t+U2 (
t) )+(n/π)Sin(π/n) x[cos((Ω2 D) t+U2 (t) )−
cos((Ω2 +p) j+U2 (t) ) ]+
(n/3π) sin (37r/n>x[cos(
(Ω2 3p) t+LJ2 (t) )-cos((
Ω2+aD> j+LI2 (t) ) ]+ (n1
5π)sill (57r/n>x[cos((Ω2
−5p> t+U2 (t))−cos[(Ω2 +5
D)t+U2(t)]+・・・・・・
]+ (10o/n) [
sin (Ωnt + U n (t) ) + (n/
π) sin(π/n) x[cos((Ω −p)t+Un(1))=cos(
(Ω +p)t+Un(t)) ]] +(n/3π)sin (37r/n)x [cos
((Oo-3p> 10u.(t))-cos((Ω.

+3p)t+U. (1))] + (n15π) sin
(5π/n)x[cos((Ω −5p)t+U.(
t))-cos((Ω +5p)t+Un(t))]
】 ＋・・・・・・ 】
However, U-(t) = S(t) +5ci(t)! (+-1, 2,..., n) Here, looking at equation (8), it is a combination of many carrier waves, so if it is demodulated after being amplified with an intermediate frequency amplifier, it is generally There is a possibility that distortion noise may be generated due to cross modulation (interference disturbance).

Furthermore, the amplitude I of the input wave is expressed by equation (8). 1゜■o2
．． ..., ■on does not necessarily have the same amplitude, but if the switching time occupancy is made equal (duty 100/
n%), the wireless base station 30-2 is higher than the wireless base station 30-1.
Because it is closer, usually ■02"03'
”” ■On is larger. I.O.I.

If the sizes of the signals, such as 102, are different, cross modulation may occur. The cause is due to the combination of many carrier waves shown in equation (8) above, and 1. There are two types of cross-modulation generation factors, which are caused by different factors.

Now, regarding cross-modulation caused by combining many carrier waves as shown in equation (8), distortion 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 outside the bandpass characteristic of the intermediate frequency amplifier. However, as already mentioned, in many cases where the switching frequency is set to 2n times or more the highest frequency of the signal, there is no need to make it any faster. By increasing the speed, m = “l” on the right side of equation (7)
, 3゜5... can be ignored in the intermediate frequency amplification stage, as can be seen from equation (8), and (8
) can be expressed as follows.

1= (1/n) X Iol 5in(Ω1t+5(
t)+5C1(t) ) + (1/n) x 1025in(Ω2t+5(t)
+5C2(t) ) +... + (1/n)xI□osin(Ωn-1 to 15(t)
+sC, (t) ) In equation (9), Ω1=Ω2=...Ωn-1=Ω,=Ω (1
o) sC2(t) =...=SC, -, (t)
Assume that it is possible to set =So, (t) =0. In fact, equation (10) is technically possible by the means described later, and equation (11) can only be obtained from the wireless base station 30-1 (or from the wireless base station 30-n in the latter half of channel switching) as described above. ) Equation (11) holds true if only the control signal to be transmitted is considered. Then, equation (9) can be transformed as follows.

I = (1/n ”) X IQI Sin (Ωt
+ s (t) + 5c1 (t) ) + (1/ n ) X (102+[03+--...
−+ I on) x sin (Ωt+5(1))(1
2) When transformed, the equation becomes as shown below.

1=(1/n)x(I 2+I ”01
n 1/2 +2 l011. xcos 5o(t) )xs+n
(Ω = 15 (t) + β (t)) β (t) = tan”
[sin s (t)X ((I01/ In)
10 cos 5o(t) ) -1](13') ' n ""'02+'03+..."" l0
n(13”) (13), (13') In equations rol<< In (14)so
Since (t)<<1 (14'), equation (13) becomes approximately as follows.

I = (1/n) x Iosin (Ωt + s (t)
+5o(t)> Looking at equation (15), this is a switching reception diversity system with n-branch antenna inputs, and as a result of performing so-called linear synthesis, in which the signals are switched and received and then combined directly, the input electric field is This shows that synthesis was performed using an input signal with a high input electric field while ignoring a low IOl. If the duty of the reception selector switch is made variable and the duty of a channel with a large reception input is increased, this effect will become more pronounced. Therefore, it has been revealed that the present invention has a reception diversity effect.

From equation (14), the output of the frequency discrimination circuit (radio receiving circuit 6
8) is expressed by the following equation.

E=d/d t (s(t) +5C(t) )=μ(
1)+μC(1) Here, μ(1) and μ,(t) are each (3)
and (4).

Note that equation (14) is always satisfied in normal mobile communication systems and is not a particularly limiting condition.

It applies deep modulation to the main audio signal compared to the control signal, and shallow modulation to the control signal.Moreover, the depth of modulation applied to the audio has recently changed to an equivalent tone (1KH2>
3.5 radians for the signal (for 25KH2 carrier spacing,
Also, if the carrier spacing is 12°5 to 1z, the same <1
．． This is because it is shallow (roughly 75 radians).

From the above, it has been clarified that equations (10) and (14) are sufficient conditions for no distortion in the case of frequency modulation. The technical conditions for establishing equation (10) will be described below.

Technically, to do this, wireless base station 30-1, 30
-2, . . . , 30-n transmitting units 31-1, 31-2.・・・
. , 31-n by increasing the frequency stability of the reference crystal oscillator which determines the stability of the carrier 8 frequency. For example, in the example of the car telephone system described later, the stability of the reference crystal oscillator installed in the base station is currently 0.
Since it is about 5 to 1 Dpm (O55 to IX 10'), the frequency fluctuation of the carrier wave is txlo-6x 900MHz
-900 tfz.

In this case, noise is just mixed into the audio signal band.

However, if 0.01ppm has become possible due to technological advances, then 1x 10'x 900MHz =
Even if there is a harmonic of the noise at 9 Hz, there is less possibility that the large energy will be mixed into the signal band. Alternatively, in a wireless system using a carrier wave frequency of 9MH7, a carrier wave fluctuation of 100 m will not introduce noise even with the current technology.

The above explained the case where the mobile radio II50 receives the data.
A case in which the mobile radio device 50 transmits will now be described.

In FIG. 1B, the wireless signals switched by the changeover switch 64-2 are, for example, wireless channels CH1, CH2,
..., CHn are sequentially switched, but the receiving side is the radio base station 30-1 (CHl).

3O-2 (CH2>, ..., or wireless base station 30-
There is no cross-modulation problem when the signals are received separately on CHn and mixed as in the case of receiving on the mobile radio 50 side. However, as is clear from equation 8), there are components of the carrier angular frequency (Ω±np) as sidebands, so these are emitted into space and interfere with the communication of other channels or other systems. It is necessary to filter by using a bandpass filter at the transmission output section so as not to affect the signal.

For this purpose, it is necessary to spread the equation (Ω±')p) outside the frequencies of all channels transmitted by the mobile radio 150 as the switching frequency, as shown in Figures 1A-1 and 1B used in the example. In the car phone system, p/ (27r) >
l 5XnMH2.

This will be explained below using formulas. However, the characters used in the formula are the same as above unless otherwise specified. for example,
The transmission signal appearing at the output of the transmission mixer 61 in FIG. 11 is expressed by the following equation.

I=I.

[1+2Σ (n/mπ)) m=1 xsin (myr/n) cos mp t]
xsin (Ω1t+5(t)+5o(t))+I.

[1+2Σ (n/mπ)) 1n=1 XSin (m7r/n) xcos mp (t-2yr/ (np)) ]x
sin (Ω2t+5(t)+5C(t)) 10■.

[1+2Σ (n/mπ)) m=1 xsin (mπ/n) xcos mp (t-4π/ (np)) ]xsi
n (Ω3t+5(t) +5C(t))”0 [1+
2 ax (n/r“π)) xsin (mπ/n> xcos mp (t−2(n −1) yr/ (n
o) )xsin (Ω t+5(t)+5o(t))
m=1.2.5. ...... However, p is the switching angular frequency, m is a positive odd number, and the switching times for n input waves are set at equal intervals.

When equation (17) is transformed, an equation similar to equation (8) is obtained. Then, when the obtained equation is passed through a bandpass filter having the function as described above, the following equation is obtained as an output signal.

j=(sin(Ω t+5(t)+5o(t))+l5
in(Ω2 t + S (t) + 5o(t) )
＋・・・・・・ ＋ IoS! n (Ω, n t+5(t)+5C(t
)) In the above equation, the first term on the right side is for the radio base station 30-1, the second term is for the radio base station 30-2, and the first term is for the radio base station 30-1, and each signal is a normal frequency modulated signal. The formula is the same as for sending.

The uplink signal of channel CH1 is transmitted from the radio base station 30-1.
．． The upstream signal of channel CH2 is received at 30-2, and the upstream signal of channel CHn is received at 30-n. These received signals are demodulated and transmitted to necessary devices such as the barrier switch 20.

Alternatively, the wireless base station 30-1
In the case of having the configuration shown in the figure, the uplink signal of channel CH1 is sent to the transceiver 90-1 of the radio base station 30-1. Channel C
The uplink signal of H2 is transmitted and received by the same 30-1 1190-2. In the following order, the upstream signals of channel CHn may be received and demodulated by the transmitter/receiver 90-n of channel CHn, and then mixed and transmitted to necessary devices such as the barrier exchange 20.

As is clear from the above description, by using the multiplex transmission method and apparatus of the present invention, it is possible to obtain a signal diversity effect in the receiving section.

In the barrier switch 20, the wireless base stations 30-1, 30-2.
. . , 30-n, the audio signals are transmitted from the radio base stations 30-1, 30-2. ...,
Mix the signals from 30-n. In addition, when mixing,
The signals from the radio base stations 30-2, 30-3゜..., 30-n have better transmission quality than the signals from 30-1, so they can be mixed as is, or the signals from the radio base stations 30-2, 30-3゜..., 30-n can be mixed as is, or the output proportional to the S/N You can mix it with

In other words, a reception diversity effect is obtained.

The transmitting/receiving 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 synthesizer 55- of the changeover switch 64-1
1.55-2. ..., 55-n have the same connection duration (duty time). However, this is not always necessary, and the diversity effect will increase if the wireless channel is connected for a relatively long time to a radio channel that provides a reception input with a good S/N ratio. For this purpose, a part of the reception section is synchronized with the changeover switch 64-1, detects the signal-to-noise ratio at that time, and transmits this to the control section 58, thereby changing the frequency of the output of the reception switching controller 65C. This makes it possible to achieve the above objectives. This is also possible with the configuration shown in Figure 1B, but
In order to facilitate technical explanation, the following description will be made using the configuration shown in FIG. 1H.

The difference in this figure from FIG. 1B is that the radio receiving circuit 68
Apart from this, a C/N measurement receiving section 52, a receiving mixer 73,
and a changeover switch 64-3 are installed, and a changeover switch 64-3 is installed.
The control of 4-3 is performed by the control section 58B. The operation of the cylinder 11-1 will be explained below.

In the figure, a reception mixer 73 is installed at the front stage to operate the C/N measuring reception section 52. A part of the reception signal received by mobile radio 150B is added to reception mixer 73. The output from the changeover switch 64-3 is added as the local excavation frequency to the reception mixer 73. However, this 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 speed of, for example, about 10 tlz is sufficient.

When the selector switch 64-3 is in the position to turn on the output of the synthesizer 55-1, the C/N measurement receiving section 5
The control unit 58B controls the C/N value of channel CH1 measured in step 2.
to communicate. Then, when the selector switch 64-3 is in the position to turn on the output of the synthesizer 55-2, the channel CH20C/N is measured. Synthesizer 55 in the following categories
When the output of rl is turned on, the C/N of channel Q@n is measured and transmitted to the control unit 58B. The control unit 58B uses these values to control the switching frequencies of the reception switching controller 65C and the transmission switching controller 67C so that they each operate at a speed inversely proportional to the C/N, for example.

In order to enable the above-described operation, the above-described method of transmitting signals from each radio base station 30 (some modifications are required, so this will be explained below).

Now, referring to the above equation (9), I=, ΣIo, 5in(Ω, 1 1=1 +sH+s ・(t)> (9)I (i-1, 2,..., n) (9 ), the control signal transmitted from each wireless base station 30 includes the IQ of the wireless base station 30, and this ID is necessary to change the duty of the changeover switch described above. We cannot set s, H=0 (i=1.2...,n) as in equation (11). Therefore, in this case (10
) holds true, but the equation corresponding to equation (12) is as follows.

I=, Σ 1; 1 1o, 5in(Ωt +5(t) +5oH(t) ) 19) In equation (19), each S, 1(t) is a sufficient rate compared to 1 (however, the constant (terms omitted), the following equation is approximately obtained as an equation corresponding to equation (12).

1-(ns in (Ω=15(t)+,,5
S. 1(t)) Demodulate the signal expressed by equation (20),
In order to extract the control signal transmitted from each radio base station 30, it is possible to filter it using a filter by making the frequency components of the signals included in S,1(t) different.

Therefore, by measuring the C/N of each radio channel, adding the ID of the radio base station 30 that sent the signal, and sending it to the control unit 58B, the control unit 58B measures the C/N for each radio channel, that is, for each radio base station. The duty time for receiving (or transmitting) every 30 seconds can be determined in relation to the C/N value.

In order to achieve the above effects with the configuration shown in FIG. 1B, each radio base station 30-1, 302, . . .
Control signal s (t) transmitted from 30-n,
Equipped with bandpass filters for individually receiving '5C2(t)..., 5Co(t), each of which is equipped with communication quality monitoring means such as measuring the signal-to-noise ratio. Bye. Then, this measured value is reported to the control unit 58, and the changeover switch 64-1 is operated with a switching duty according to the signal-to-noise ratio.

By operating the receiving section 53 of the mobile radio device 50 as detailed above, it is possible to increase the transmitting and receiving diversity effect.

Next, a method for increasing the reception diversity effect will be briefly described. FIG. 11 shows the mobile radio t1 in this case.
An example of a 50G configuration is shown.

In Fig. 11, the input radio wave (input signal) to the mobile radio a50c is divided into n+1 equal parts at the antenna input section, and each is divided into radio receiving circuits 68-1, 68-2°..., 68-0 and an interference detector. Arrive at 62. Each radio receiving circuit 6
8-1 to 68-n, each receive mixer 63-1.
63-2. ..., 63-"), receiving section 53-1.53
-2. ..., 53-n, and the reception mixers 53-1 to 53-1 each have a synthesizer 5.
5-1.55-2. The local excavation frequency from . . . +55 n is input. Therefore, in the configuration of FIG. 11, there is no reception changeover switch 64-1, and it is possible to constantly receive and demodulate the signals of the wireless channels CH1, C)-12, . . . C)-1n.

Moreover, the output signals of these receiving sections 53-1 to 53-n are as follows.
A part is sent to the control unit 58C, and a part is sent to the communication quality monitoring unit 58C.
7-1.57-2. ..., is also sent to 57-rl, monitors the communication quality of each wireless channel, reports the results to the control section 58G, and is further sent to the receiving sections 53-1 to 53-n.
The output is applied to the signal mixing circuit 62, subjected to processing similar to that of a normal diversity receiver (in this case, synthesis after detection), and sent to the telephone section 59.

By adopting the circuit configuration as shown in FIG. 11, it is possible to obtain a large diversity effect.

As is clear from the above description, the operation of the present invention is to predict the frequency shift after switching to a new communication channel by measuring the transmission frequency of the mobile radio device 50 at the radio base station 30, and to predict the frequency shift after switching to a new communication channel. By setting and using a transmission channel of a wireless base station that communicates with channel switching interference at a suitable frequency, the system is characterized in that it eliminates noise caused by call interruptions and cross-modulation that occur due to channel switching.

Next, the method of using the control signal, which plays an important role in channel switching during a call according to the present invention, will be explained.

In the following description, it is assumed that the configuration shown in FIG. 1B is used.

Wireless base Q30-1.30-2. ..., 3O-r)
A case will be described in which the data is transmitted from to the S machine 50 before movement using channels Cl-11, CH2, . . . , CHn.

When the aforementioned channel switching preparation operation is completed, the radio receiving circuit 68 of the mobile radio device 50 receives the radio base station 30-1.3.
0-2. Channels CH1, Cl-12 from -30-n
, . . . , CHn call signals are sequentially switched by the changeover switch 64-1 in the mobile radio 150, and are selectively received.

The selector switch 64-2 also starts operating, so move!
Transmission waves from the Pl radio device 50 also start switching transmission.

Here, from the barrier switch 20 to each wireless base station 30-1 to 30-3,
The difference (1
Since the delay time difference caused by (within version 0) is at most 0.03 msec or less, there is no problem with operation and it can be ignored. Also, wireless base stations 30-2, 30-3. −．
The downlink signal from 30-(n-1) includes only a voice signal, but the downlink signal from wireless base stations 30-1 and 30-n includes a control signal (wireless base station 30-n) in addition to the voice signal.
Since the identification signal for identifying 0-1 and 30-n and the switching command signal) are inserted in the form of out-of-band signals as shown in FIG. At 68, this is received and transferred to the control section 58.

The control unit 58 identifies this signal and, under the control of the control unit 58, initially uses the channel switching response signal from the wireless base station 30-1 and subsequently uses the channel C)-1n from the wireless base station 3Q-n. To confirm that the call signal and ID signal are being sent and that the signal quality is good, the radio transmission circuit 68 is used outside the uplink call signal band, and this confirmation item is sent to the wireless base station 3 Q-n. Call channel CHn
Accordingly, communication is made to the gateway exchange 20 via the wireless base station 30-n.

At the barrier exchange 1N20, we received information that the downlink communication between the wireless base station 30-n and the mobile wireless device 50 is working well, so the communication path control unit 21 switches the switch 5WI- of the switch group 23. 1, 1-2, ... 1-n back, 5W1
-1 only is turned off. - On the other hand, mobile radio 1f150 is
For the wireless base station 30-1, stop transmission, stop the operation of the synthesizer 55-1 of the mobile wireless device 50,
Synthesizer 5 is connected to selector switch 64-1 (Fig. 1B).
5-2゜55-3. . . , 55-n is caused to perform a cyclic switching operation.

These conditions are illustrated in FIG.

Next, from mobile radio 1I150 to channels CH1, C)
2. ... Wireless base station 30-1゜30 using CHn
-2. . . , 30=n will be explained.

In the mobile radio device 50, a reception switching controller 65C and a transmission switching controller 67 are operated according to instructions from a controller 58 in the device.
G are activated, and the changeover switches 64-1 and 64-1 are activated.
4-2 are synthesizers 55-1.5 in operation, respectively.
5-2. ... Output of 55-n and 56-1.56
-2. ..., switch the output of 56-n to channel C.
)-11, cH2°, . The signals sent to this active call channel include, in addition to the call signal, an out-of-band controller @(
As shown in FIG. 2(a), the state of the channels used by the mobile radio 50 (transitioning from channels CH1, CH2, . . . , C@n to channels CH2, CH3, -, CHn), the mobile radio The identification ID of the machine 50 (for example, a tone signal such as fol in FIG. 2(a) may be used to combine fol and f03) is added.

Wireless base station ao-; (+='+, 2.... "1)
The uplink signal of the channel CH1 received at be done. In the barrier switch 20, the wireless base stations 30-1, 30-2. . . . Among the n signals from 30-n, the voice signal is transmitted to radio base station 30-1.3.
Mix the signals from 0-2..., 30-n. In the barrier switch 20, the wireless base stations 30-1, 30-2.・、
Of the n signals from radio base station 30-n,
．． 30-2. . . , 30-n, respectively, by the identification signals sent outside the voice band added by the wireless base stations 30-1, 30-2, . −． It is confirmed that the signals are from channels Cl-11, CH2, . . . , CHn from 30-n.

The barrier switch 20 confirms that the channel switching operation is proceeding smoothly during the call, and then switches the channel! Channel CHn to the control unit 38 of the wireless base station 301 via the wireless base station 3 Q-n.
1, and wireless base station 30-2.30-3
．． ... Report that it is possible to concentrate on communication with 30-n.

In the mobile radio device 50 that has received this control signal, the control unit 5
8, synthesizers 55-1 and 56-1
The operation of the synthesizer 55-2, 55-3, .
... 55-n are operated in a circular manner, and the transmission channel selection changeover switch 64-2 includes synthesizers 56-2, 56-3, . ..., 56-n to continue the cyclic switching operation.

As a result, the mobile radio 50 changes the previous channel CI.
-11 to end the communication with the wireless base station 30-1,
Wireless base station 30-2.30-3. ...3O-ri and
They are in a state of communicating using channels CH2, CH3°, . . . , CHn, respectively. With this, channel switching is completed, and a state in which communication is being performed using the analytical wireless channel group is realized. The above-described switching operations for the upper channel and the lower channel are executed in parallel and are completed at approximately the same time.

As is clear from the above description, there is no momentary interruption during channel switching, and noise can be kept to a low level that poses no problem in practical use.

If a malfunction or non-operation occurs during any of the above operations, the operation must be restarted from the previous operation. In addition, when the operational failure is large, the control unit 58
There is also an operation for returning to the communication channel before the switching operation, which is stored in the memory section built into the device.

Figures 78 to 7E include Figure 18-1;

A flow chart illustrating the operation of the system shown in FIGS. 1B and 1C is shown.

Gateway exchange 20. Wireless base stations 30-1, 302,...
30-n and the mobile radio 50 start operating, and the switches 5W1-1.1-2. . . , 1-(nl) are on, and the radio base stations 30-1, 30-2 . −． 30- (n
-1> and the mobile radio device 50 are communicating. For this communication, channels CH1, CH2, . . . , CH-(n-
1> downlink frequency F1. F2. ..., Fn-1 and upstream frequencies f1, f2, "" fn-1 are used (3101, Fig. 7A).

Radio base station 30-1, 30-2. ....

30-(n-1> constantly issues a reception status report from the mobile radio device 50, and if deterioration in communication quality is discovered, it is immediately reported to the mobile radio device 50 (3102>
. The communication quality monitoring unit 57 of the mobile radio device 50 that receives this (5103) monitors whether the call quality has deteriorated below level L1 (S104). If the call quality has deteriorated below level L1 (S104YES)
), the control unit 58 selects wireless base stations 30-2, 30-3, . −． 30-n, etc., whereas the wireless base stations 30-1.30-2.30-3. -, 3
0-(n-1) and the mobile radio 4150 using the uplink frequency f1. f2, ... instructs to monitor and receive signals of f, -1 (5105, 7th
Figure B).

Each of the surrounding wireless base stations 30 that has received an instruction to monitor reception (for example, in 30-n>, monitor reception of the signal of frequency f1 8106) and report the result to the communication quality monitoring unit 57 of the mobile radio device 50 3107 .3108), the monitor reception quality from each radio base station 30 is measured and compared, and the call quality of radio base station 3Q-n is set to a certain level L2, for example.
(S109YES).

If the communication quality is not good (NO in 3109), the process returns to step 3105 and other wireless base stations 30 are made to perform monitor reception.

Therefore, the control unit 58 controls whether the mobile radio device 50 is connected to the radio base station 30 or
5110, and the seventh
In order to switch to communication with the wireless base station 30-n, the wireless base station 30-n searches for an empty channel that can be used (5111), and as a result, the channel CHn
is determined (S112). The control unit 58 controls the mobile radio device 5
0 to prepare for communication on channel Cl-1n (S1
13).

A communication preparation command for using channel CHn is sent to radio base station 30-n, and preparations for communication using channel CHn are made (5114). The mobile radio device 50 prepares to enable communication using the channel CHn, that is, the control section 58 prepares the synthesizers 55-n and 56-n.
n to receive the frequency F and transmit at the frequency fn, and also the reception and transmission switching controller 6
5C and 67C enter switching operation (3115, Fig. 7D)
.

When the radio base station 30-n is ready to communicate using channel CHn, it notifies the mobile radio 50 of the completion of preparation using channel CHn (3116), and at the same time, the radio base station 30-n n issues a report to the barrier exchange 120 that preparations for communication between the radio base station 30-n and the mobile radio 50 have been completed via channel CHrl (8116).

The completion of communication preparation between the radio base station 30-n and the mobile radio device 50 using the channel CHn is confirmed by the barrier exchange 112.
0 is confirmed (S117), the switches 5W1-1.1-2. ...Leave 1-(n-1> on and turn on switch 5W1-n (31
18). Therefore, the communication path control unit 21 included in the barrier exchange 20 reports to the mobile radio device 50 that it is possible to start communication with the mobile radio device 50 using channel CI-1n (3119> .

Upon receiving the communication start possibility report, the radio base station 3Q-n sends a communication start signal to the mobile radio device 50 using channel CHn.
(3123>. The mobile radio device 50 confirms the start of communication by channel 1/channel CHn using the ID signal, which is an identification signal for identifying the radio base station 30-n (8124), and at the same time sends it to the mobile radio The communication quality monitoring unit 57 of the mobile radio 1150 measures the quality level of communication between the mobile radio 150 and the radio base station 30-n, and when it detects that the quality level is equal to or higher than a certain quality level 12 (S125YES, FIG. 7E). , instructs the radio base station 30-1 to stop communication using channel CHI between the radio base station 30-1 and the mobile radio 11i 150 (3126). turns off communication on channel CI-11 (3127>. When the mobile radio 50 confirms that communication on channel CHI has stopped (3129>,
The operation of the synthesizers 551 and 56-1 is stopped, the changeover switch 64-1 stops switching to the output terminal of the synthesizer 55-1, and the changeover switch 64-24. t Stop switching to the output terminal of the synthesizer 56-1 (although this operation is not necessarily required), and switch to the channel CH2,
CH3, . . . are operated with Cl-In.

The communication control unit 21 of the gateway exchange 20, which has confirmed that channel CH1 communication has stopped, switches the switch 5W1-2 of the switch group 23.
．． 1-3. -, 1-rN remain on, switch 5
Turn off WI-1 (8128).

This ends the period of channel switching operation and switches 5W1-2.1-3. -1-n on state, channels CH2, CH3,..., CHn downlink frequency F2
．． F3. ... Fo upstream frequency f2- f3. ...
, fo, the mobile radio device 50 connects to the radio base station 30-2.
．． 30-3.・, between 30-n, -shun disconnection,
It is possible to continue high-quality communication without introducing noise and obtaining a transmitting/receiving diversity effect (S130).
.

The busy channel switching operation for the mobile wireless device 50 in the high-speed moving mode is similar to the busy channel switching in the low-speed moving -[- mode described above. When a call is started prior to the call switching performed by the mobile radio device 50 mounted on the car, the car is moving at a low speed.
It is assumed that the call to the board was successful. However, if the moving speed of the car subsequently increases during the call, the following technical difficulties occur. In other words, one of the multiple channels used for calls has deteriorated in call quality, so the use of this channel is discontinued and a new call channel is used to connect the new wireless base station 3.
In the middle of the operation of starting communication with 0, the speech quality of the old channel deteriorates below the quality determined by the system. Alternatively, setting up a new channel with a new wireless base station 30 fails due to the high-speed movement mode. The specific cause of the failure is that the transmission quality of digital control signals deteriorates due to deterioration of radio wave propagation characteristics due to high-speed movement, and
0 to use a new channel or its response signal cannot be received well.

Wide area wireless base station 17 to solve such problems
Figures 7F to 7M show the operation flow of the system with the addition of
It is shown and explained in the figure.

Gateway exchange 20. Radio base stations 30-1, 30-2, -.
30-n etc. (30-p, 30-Q, -.

etc. are simply referred to as 30-n etc.), wide area wireless base station 17-1
．． 17-2. ..., 17-1, etc. (hereinafter simply referred to as the wide area wireless base station 17) and the mobile wireless device 50 start operating, and the switches 5W1-1.1-2 . ...1-(n-1> is on, and the wireless base stations 30-1, 30-2..., 3o-<
n-1> and the mobile radio device 50 are communicating in low-speed movement mode.

This communication includes channels C)-11, CH2°, . . . instructed by the control unit 58 included in the mobile radio device 50.
, Ct-1-(n-1) downlink frequency F1. F2゜”
” Fn-1 and upstream frequency f4.f2...fo-
4 is used (S701, Figure 7F).

Radio base station 30-1, 30-2. ....

30-(n-1> constantly reports the reception status from the mobile radio 50, and if deterioration in communication quality is discovered, it is immediately reported to the mobile radio [50 (8702>)
. In the mobile radio 150 that received this, the communication quality monitoring unit 57 found that the mobile radio 50 itself had deteriorated in call quality (3703, 5704), and whether the call quality was at a level or not deteriorated further. (37)
05). If the call quality has deteriorated (S705YES), the control unit 58 sends a message to the wireless base station 30-n, etc. in the vicinity of the wireless base station 30-1.
Wireless base station 30-1.30-2.30-3. -30-(
n-1> and the mobile radio device 50, the uplink frequency f1. Among the signals of f2° . . .

Each surrounding wireless base station 30-n receives an instruction for monitor reception.
etc., the signal of frequency f1 should be monitored and received 5707
), and sends the results to the communication quality monitoring unit 57 of the mobile radio 1150.
370B, 3709), each wireless base station 30-
The monitor reception quality from the radio base 830-n is measured and compared, and it is detected that the call quality of the radio base 830-n is better than a certain standard level L2 (S710YES>).

If the communication quality is not good (871ONO), return to step 5706 (Figure 7G) and repeatedly send monitor reception instructions until the specified number of times is reached (3711N).
O1 Figure 7H).

When the number of monitor reception instructions sent reaches the specified number of times (
3711YES), the control unit 58 determines that the mobile radio device 50 itself is in the high-speed movement mode, and determines to communicate with the wide area wireless base station 17 in the high-speed movement mode.
12), start sending and receiving on the wide area communication channel (3)
713).

Therefore, the mobile radio 1150 sends a communication request signal to the wide area radio base station 17 on a control channel (CH) for wide area communication in order to notify the wide area radio base station 17 that it desires communication (S
714).

The wide area wireless base station 17 that received this communication request signal checks the ID of the mobile wireless device 50 (3715) and searches for an empty channel (S716).

Mobile wireless tQ150 is a wireless base station 3 with degraded communication quality.
0-1 to stop communication via channel CHI (5717, Fig. 71), and radio base station 3 receives this instruction.
0-1 stops communication by channel CI-11 (
3718). Since the mobile radio device 50 is in high-speed movement mode, it will soon reach the radio base stations 30-2 to 3O-(n-1
Since it can be predicted that the communication quality of communications with > will also deteriorate,
Sends a signal to stop communication as soon as the call quality deteriorates, to indicate that communication is currently desired with the wide area wireless base station 17, and to request that the wide area wireless base station 17 measure the speed ( 3719) Upon receiving this signal (3720), the wireless base stations 30-2 to 3O-(n
-1>, the mobile radio device 50 confirms that it has shifted to high-speed mode, and transfers a request for communication with the wide area radio base station 17 and a speed measurement request to the gateway exchange 20 (S721).

Upon receiving this notification, the barrier switch 20 prepares to use the communication path switch 5W1-18 for the wide area wireless base station (3722).

Eventually, the communication quality at the radio base stations 30-2 to 3O-(n-1) deteriorates, so communication with the mobile radio 150 is stopped (S723).

When the wide area wireless base station 17 finishes searching for an empty channel,
5724 Please send empty channel information via control channel.
), When the mobile radio 50 learns from this empty channel information that the communication channel CH101 for wide area communication is empty and confirms that it can be used (S725),
Mobile radio 5O uses communication channels Ct-1101 to Ct-10.
A notification specifying 0+(nl) is transmitted to the wide area wireless base station 17 via the control channel (3726).

Upon receiving the notification specifying the communication channel as C)-1101 to 100+(n-1>), the wide area wireless base station 17 confirms that the channel Cl-1101, etc. can be used, and switches to the channel CH101, etc. (S727), sends a channel switching completion report via the control channel.
728, FIG. 7J), the mobile radio device 50 receives this,
It is confirmed that it is possible to enter into a call using the wide area communication call channel Cl-1101 or the like (S729).

Since the wide area wireless base station 17 has completed the channel opening, it sends the wide area wireless base station 17 to the barrier exchange FA 20 to open the wide area wireless base station 17! ;11 Request to turn on the communication path switch 5W-IB etc. for base station 17.5
730), and in response to this, the barrier exchange 120 turns on the communication path switch SW-'1-IB, etc. (S731).

In addition, wireless base stations 301.30-2 to 30-(n
-1>'s communication with the mobile radio 150 is also terminated due to the deterioration of the communication quality, and communication from these radio base stations 30-1, 30-2 to 3O-(n-1> to the communication path switches 5W1-1 to 5W1- (n-1) is also sequentially requested to be turned off (S732), the gateway switch 20 receives calls to switch 5W1-1, 5W1-2 or 5W1-(n
-1> (S733), and channels C1110 and C1110 are respectively turned off between the wide area wireless base station 17 and the mobile wireless device 50.
1,102~loo+(n-1>, downlink frequency G1~
G0-1, high-quality communication (talk) is performed using uplink frequencies g1 to 'n-1 (8734).

When the call ends, the transmitter/receiver is put down, and the on-hook signal and end-of-call signal are sent to the wide area wireless base station 17 via channel CH101 etc. (3736), and then transferred (3736).
3737), in the barrier switch 20, the communication path control section 21 is operated, and the switches 5W1-1B of the switch group 23,
1-2B~1-(Turn off n-1>8 and end the call (3
738).

In step 5710 (Figure 7G), mobile radio 15
0 successfully receives the monitor signal (S710YE
S>, the control unit 58 controls whether the mobile radio device 50 is connected to the radio base station 3
It is determined that the mobile station has moved from the zone covered by radio base station 30-n to the zone covered by radio base station 30-n (3739, Fig. 7), and switches to communication with radio base station 30-n while remaining in low-speed movement mode. Then, the wireless base station 30-n searches for an empty channel that can be used (3740), and as a result, determines, for example, channel CH") (374).
1). The control section 58 controls the transmission section 51- of the mobile radio device 50.
radio base station 30- through n and receiving section 53-n.
n to prepare for communication on channel CI-I n (S742).

A communication preparation command for using this channel CHn is sent to the wireless base station 30-n, and preparations are made for communication using the channel C1-1n (3743). The mobile radio device 50 is
Preparations to enable communication via channel CH "),
That is, the control unit 58 instructs the synthesizers 55-n and 56-n to receive the frequency " and transmit at the frequency f, and the switching controller 65 enters the switching operation (S744, Figure 7L).

When you are ready to communicate using channels 01 to 1n,
The radio base station 30-n sends a report of completion of preparation to Channel 1/C.
Contact the mobile radio device 50 using I-1n 57
45) At the same time, the radio base station 30-n sends the radio base station 30-n to the gateway switch 20 using the channel CHn.
A report is issued that communication preparations have been completed between the mobile radio 1450 and the mobile radio 1450 (S745). Mobile radio device 50 that received this
3749), issues a communication start command to the wireless base station 130n (5750), and upon receiving this command, the wireless base station 30-n waits for communication (S751). ).

The gateway exchange 2 indicates the completion of communication preparation between the wireless base station 30-n and the mobile wireless device 50 using the channel CHn.
0 is confirmed (S746), the switches 5WI-1, 1-2, . . . , 1-(n-1> of the switch group 23 are left on, and the switches 5W1-n are also turned on (S7
47). Therefore, the communication path control unit 21 included in the gateway exchange 20 reports to the mobile radio FM 50 that it is possible to start communication with the mobile radio 50 using channel C)-1n (3748). ).

Upon receiving the communication start possibility report, the radio base station 3Q-n sends a communication start signal to the mobile radio device 50 using channel C)-1n (S752). The mobile radio 150 has an ID which is an identification signal for identifying the radio base Jm30-n.
The signal confirms the start of communication via channel C1-1n (5753), and at the same time, the communication quality monitoring unit 57 of the mobile radio device 50 checks whether the mobile radio device 50 and the radio base station 3 Q-n
Measures the quality level of communication between the radio base station 30-1 and the mobile radio 150, and if it detects that the quality level is 2 or higher (S754YES, FIG. 7M), the channel CH1 between the radio base station 30-1 and the mobile radio 150 is Instructs the radio base station 30-1 to stop the communication that was being performed using the radio base station 30-1 (S755).
The radio base station 30-1 turns off the low-speed mobile mode communication on channel C(''1 (3756>). When the mobile radio device 50 confirms that communication on channel CHI has stopped (
3758), the operation of synthesizers 55-1 and 56-1 is stopped, and the changeover switch 64-1 is set to
-1 output terminal is stopped, and the changeover switch 64
-2 stops switching to the output terminal of the synthesizer 56-1 (although this operation is not necessarily required), and allows the channels C112, CH3, . . . CHn to operate.

The communication path control unit 21 of the gateway exchange 20, which has confirmed that the channel CH1 communication has stopped, switches the switch 5WI- of the switch group 23 to
Leave switches 2, 1-3, ., 1-n on, and switch 5.
Turn off W1-1 (S757).

As a result, the channel switching operation period ends, and with the switches 5WI-2, 1-3, -, 1-n in the on state, channels CH2, CH3, . . . , CHn
Downlink frequency F2. F3. ...F, upstream frequency f2. f
3. ..., f, the mobile radio device 50 communicates with the radio base station 30-2, 30-3°... 30-n, -
Even when disconnected for a moment, high-quality communication can be continued without introducing noise and by obtaining a transmitting/receiving diversity effect (3759). The movement information of the mobile radio device 50 is transmitted to the gateway exchange 20, and by analyzing this movement information, it is possible to determine whether the mobile radio device 50 is moving in the direction of the radio base station 30 or wide-area thermal I! Transmit movement information to the base station 17 in advance and shift to high-speed movement mode! Since preparations can be made for the provision of service to the #l radio 50, channel switching during a call can be carried out more smoothly.

Further, normally, the time required for switching the channel during a call is completed within 1 to 3 seconds after the switching is decided.

Roughly speaking, when the mobile radio device 50 itself recognizes that it is in the high-speed movement mode, the processes shown in FIGS. 1B, 1H,
Mobile radio [50 (
If B, C, D>, even after the channel switching during the call is completed, the mobile radio 50 (B, C, D> constantly (or intermittently according to a certain rule) transmits control signals at high speed. mode, and calls the nearby wide-area wireless base station 817 for high-speed movement mode to implement channel switching during a call, which can be carried out at an early stage. This makes it possible to avoid a situation where reception becomes impossible.

From the point of view of effective frequency utilization, it is clear that the smaller the zone, the better.

From this point, all mobile radio devices 50 are connected to the wide area radio base station 1.
7 is not a good idea, and it is appropriate to allow communication only in a mode different from the normal state, such as when moving at high speed. In this case, the proportion of the high-speed transfer mode in all the transfer heat 1[50 in the system is a problem, but it is estimated to be within several percent or at most 10%.

For example, if we take the mobile phone shown in the following document Ito "Study of mobile phone system - Focusing on radio line control and routing" as a system, Telecommunications Society Technical Report C387-16 May 1986, Tokyo Assuming that there are 7 million mobile phone owners in the 23 wards, it is thought that 5% of the total, or 350,000, are used in vehicles.

Therefore, if the proportion of all mobile radio devices 50 is a few percent, it will not be a factor that greatly deteriorates the frequency effective utilization rate as a system, and the superiority of the present invention is also demonstrated from this aspect. become.

(6) Estimation of moving direction and speed of mobile radio equipment and call channel allocation method for traffic congestion countermeasures Mobile radio equipment 5
It is possible to detect the traveling direction and speed of the mobile radio device 50 by measuring and comparing changes in received electric fields or communication quality received by a plurality of radio base stations 30 communicating with the mobile radio device 50.

These will be explained below using FIG. 9.

In FIG. 9, 16 circles each indicate small zones 71 to Z16 within the ν-bi area, and radio base stations 30-1, 30-2, . ..., 30-
16 etc. indicate areas where communication is possible.

The mobile radio device 50 currently communicating is in zone Z6 and is connected to radio base station 30-2.30-3.30-5.30-6.
．． Assume that communication is being performed with seven stations: 30-7°, 30-10, and 30-11, applying diversity. Assuming that the mobile radio device 50 is moving in the direction of the arrow in FIG.
The seven radio base stations that are currently receiving transmission signals from the mobile radio device 50 are each measuring the received electric field or reception quality, and these values are collected into the mobile radio device 50.

By comparing these measurement results, the mobile radio device 5o estimates the moving direction and speed of the mobile radio device 50 using the following method.

First, it can be estimated that the direction of movement is toward the wireless base 8 (30-7 in Figure 9) where the observed input received electric field level changes most rapidly.This is a highly reliable result. In order to obtain By dividing the measurement into intervals of time (3 to 10 seconds in the case of automobiles), it is possible to eliminate variations in the measured values.No. 9
In the figure, when the measurement results obtained in this way are expressed in order from radio base M30 with the largest increase in the input electric field, for example, 30-7>30-11>30-3, and the radio base M30 with the largest decrease in the input electric field. If expressed in order starting from wireless base M30, it would be as follows: 30-6>30-10>30-2>36-5.

Furthermore, the moving speed can be estimated by comparing it with the radio wave propagation curve obtained from the radio wave propagation characteristics.

By using the above measurement results, mobile radio tm50
Estimate the destination of the mobile radio, investigate the communication traffic situation of the radio base station 30 at the destination, and if it is in a congested state, the communication traffic of the mobile radio 50 that is communicating with the radio base station 30 is determined. It becomes possible to reduce the number of IQ base stations 30. Next, if the traffic congestion is not in one zone but in multiple zones, 1. Wide-area comparison measures will be needed. This is a phenomenon that occurs in car telephone systems, etc. in the city center of Oita City, and is shown in Figure 10 at 30-6, 30-7. and 30-11 are in a traffic congestion state. Application of the present invention in this regard will be explained in detail.

Assume that a mobile radio 50a is present in zone 211, moving in the direction of the arrow, and transmitting a calling signal. This calling signal is collected by the mobile radio 50a, and the communication channel to be assigned is determined.
10.3-0-11゜30-12.30-14.30-
15 etc. is allocated (diaperity transmission and reception is performed). However, if the traffic is congested in the above three zones (Z6, 7.11>), channels 30-6, 30-7 and 30-11 cannot be applied to v1. In this case, as the communication partner, The non-MI other station 30 with the best call quality is naturally 30-11, but it cannot be assigned for the above reason.If the multiplicity of diversity is the above 4-fold (30-10, 30-12,
30-14゜30-15>, the mobile radio device 50a can estimate the moving direction and moving speed of the mobile radio device 50a. -16 to allocate the channels to be used.

Therefore, although the mobile radio device 50a is located in zone Z11, it is located at radio base stations 30-86 and 30- which are slightly far away.
Communication will begin with 16.

By applying the channel allocation described above, it becomes possible to take countermeasures against congestion in high-traffic areas, which could not be solved using conventional system technology.

In addition, when the mobile radio device according to the present invention is mounted on a car and used, an example of communicating with a wide area radio base station by receiving power from a battery in the car is shown in FIGS. 1A-2 and 1A-3. Although the present invention has been explained using the drawings, it is not necessary to limit the present invention to automobiles, and the following usage examples are also possible.

That is, when a person is able to carry a portable battery with a relatively large battery capacity, the power supply terminal of the mobile radio 50 and the output terminal of the portable battery are connected using the power cord shown in FIG. 1A-2. Once connected, it becomes possible to perform long-term communication with a wide area wireless base station without using the battery built into the mobile wireless device 50. If you are in a remote mountain area or on the coast, and there is no wireless base station with low power output (about 10mW) nearby even if you want to communicate, you will not be able to make or receive calls as described above when moving at high speed. . However, in this case, it is also impossible to estimate the moving speed of the mobile radio device 50. However, if a certain time timing is set in the mobile radio device 50 and it is still not possible to make a call even after that timing, the output of the transmitting section is increased to access the wide area radio base station 17. In some cases, you may be able to make a call. Alternatively, in response to an incoming call, if the location of the mobile radio 50 can be confirmed or estimated by the gateway switch 20 or the wide area radio base station 17, the incoming call is made from the radio base 830, and after a certain timing has elapsed. If there is no response, please contact
lj! If the wireless base station 17 sends an incoming call signal and the mobile radio 50 is equipped with a function that allows it to respond to the wide-area thermal tiQ13 base station 17, it may be possible to receive a call, which is effective. It is.

[Effects of the Invention] As is clear from the above description, by applying the present invention to a mobile communication system using portable radio telephones with a small zone configuration, it is possible to make calls (as in the conventional system).
In the case of facsimile signals and data signals, image quality deterioration and burst-like signal errors occurred, which caused problems when changing zones during communications), but even if the frequency of channel switching during communications increases. However, this concern will be completely eliminated, and communication quality will be improved through the adoption of economical transmitting and receiving diversity, and effective frequency utilization will be improved through the reduction of interference. The service was made technically possible. In addition, it is possible to improve communication quality by effectively using wireless equipment during times when traffic is slow, to substantially increase the number of usable channels when traffic suddenly increases in a certain small zone, and to improve communication quality by effectively using wireless equipment during times when traffic is at its peak. In addition to being able to process location registration signals from mobile radios, which are portable radio telephones installed in cars, it is also possible to effectively specify communication channels by detecting the moving direction and speed of moving objects. This has made it possible to construct an economical mobile communication system with high frequency utilization efficiency.

When mobile radio equipment is moving at high speed, the small zone method using microcells has a technical problem in that signal traffic for location registration increases rapidly. In order to ensure smooth operation, wide-area wireless base stations were installed, and the power for mobile wireless telephones was obtained from car batteries, making it possible to obtain a large transmission output. made communication possible.

Therefore, the effects of the present invention are extremely large.

[Brief explanation of the drawing]

Figures 1A-1, 1A-2, and 1A-3 are configuration diagrams for explaining one embodiment of the present invention, and Figure 1A-4 is moved according to the usage shown in Figure 1A-2. 1B, 1C, and 1D are circuit configuration diagrams showing an example of increasing the transmission output of a wireless device.
1E and 1F are circuit configuration diagrams showing other embodiments of the wireless base station of the present invention, and FIG. 1G is a wide area wireless base station. Figures 1H, 11, and 1J are circuit configuration diagrams showing one embodiment of a transmitter/receiver used in a wireless base station. FIG. 1 and FIG. 1L are circuit configuration diagrams showing still other embodiments of the wireless base station of the present invention. FIGS. 1M and 1N are transmitting and receiving circuit diagrams showing other embodiments of the vl radio device. 2(a) and 2(b) are spectrum diagrams and circuit configuration diagrams for explaining configuration examples of control signals used in the present invention; FIG. 3 is a circuit diagram showing another embodiment of the device; 8 to 1C are timing charts for explaining the operation of the system; FIGS. 4A and 4B are flowcharts showing the flow of the location registration operation of the present invention; FIGS. 4C, 4D, and Figure 4E, Figure 4F, Figure 4G,
4H and 41 are flowcharts showing the flow of the location registration operation of the present invention in high-speed movement mode; FIGS. 5A and 5B are flowcharts showing the flow of the calling operation from the mobile radio; and 5C. Figure 5D, Figure 5E, Figure 5F, Figure 5G,
Figures 5H and 5■ are flowcharts showing the flow of calling operations from a mobile radio in high-speed movement mode, and Figures 6A, 6B, and 6C are flowcharts showing the flow of calling operations from a mobile radio in high-speed movement mode. Flowcharts shown in Figures 6D and 6E
6F, 6G, 61-1, 61, 6J, and 6 are flowcharts showing the flow of call incoming operations to a mobile radio in high-speed movement mode, and 7A. Figures 7B, 7C, 7D and 7E
The figures are flow diagrams to show the flow of the channel switching operation of the system shown in Figures 18 to 1C, Figures 7F, 7G, 7H, 71, 7J,
Figure 7, Figure 7L, and Figure 7M are flowcharts showing the flow of channel switching operations in high-speed movement mode, and Figure 8 schematically explains the relationship between the service areas of wide area wireless base stations and wireless base stations. FIG. 9 is an operational conceptual diagram for explaining the traveling direction and speed detection of a mobile radio, and FIG. 10 is a conceptual system configuration diagram for explaining an example of a conventional system. 10...Telephone network 11...Switchboard 12...
・Radio line control 8 13A-D...Radio base station 14A
-D...Zone 15...Mobile radio 16A-D
...Transmission line 17-1.17-2. ... 17-1... Wide area transmission base station 19.20... Gateway switch 21... Call path control unit 23... Switch group 24
...ID identification storage section 25...Interface section 26...Angle modulator 27...Transmission mixer 29
...Transmission power amplifier 30.30B, 30C. 30-1. ~30-n...Radio base station 31.31-1
~31-n...Transmission unit 32...Radio base station control device 33.33-1~33-n...Reception unit 34.34C,
34-1 to 34-n...ID identification storage units 35-1 to 35-n, 36-1 to 36-n...Synthesizer 37...Communication quality monitoring units 3B, 38B, 38C...Control Section 39...Interface 40.40C...Reference crystal oscillator 41...Transmission mixer 42...Interference detector 43...Reception mixer 45...Reception switching controller 46... Radio transmitting circuit 47...Transmission switching controller 48...Radio receiving circuit 50.50B, 50C, 50D...Mobile radio device 51.
...Transmission section 53.53-1 to 53-n...Reception section 54...Io
-Roam area information verification storage unit 55-1 to 55-n, 5
6-1 to 56-n...Synthesizer 57...Communication quality monitoring section 5B, 58B, 58C, 58D...Control section 59...
Telephone section 61.61-1 to 51-n... Transmission microphone 62...
Interference detectors 63.63-1 to 63-n...reception mixer 64-1.
64-2.64-3...Selector switch 65C...Reception switching controller 66.66-1 to 66-n...Radio transmitter circuit 67C.
...Transmission switching controller 6B, 68-1 to 68-n...Radio receiving circuit 69...
・Mixing circuit 71...Reference crystal excavator 77...
・Transmission amplifier 78...Transmission amplifier controller 79...
- Transmission output selector switch 91...Digital encoding circuit 92...Multiple conversion circuits 93-1 to 93-m...Communication quality monitoring receiver 94.
... Control transceiver 96 ... Antenna sharing device 151 ... Control section 152 ... Control signal interface 153 ... Communication signal interface 154-1 to 154-3 ... Angle modulator 155-1 ...
155-3...Local oscillator 156-1 to 156-3.
... Transmission mixer 157 ... Reference crystal excavator 158-1 to 158-3 ... Transmission power amplifier 161-
1 to 161-3...Reception mixer 162-1 to 162-
3... Demodulators 71 to Z16... Zones.

Claims (1)

[Claims] 1. Each radio base means (30, 30B, 30C,
30D, 30E), at least one wide area radio base means (17) covering said service area and transmitting and receiving control and communication signals on request; and mobile radio means (17) present within said service area. 50,
50B, 50C, 50D), and when the mobile radio means is carried, it has the transmission capability to transmit to each of the radio base stations, and when it is used connected to the power source of a car, it has the transmission capability of the wide area radio base means. A communication method for mobile communications that allows transmission capability to be sent to. 2. Each radio base means (30, 30B, 30C,
30D, 30E); at least one wide area radio base means (17) covering said service area and transmitting and receiving control and communication signals on request; and mobile radio means (17) located within said service area. 50, 50B, 50C, 50
D); and barrier exchange means for connecting each of the radio base means and wide area radio base means to a general telephone network and making it possible to communicate with the mobile radio means, When the mobile radio means is carried, it has a transmission capability that allows it to transmit to each of the radio base means, and when it is connected to a power source of an automobile, it has a transmission capability that allows it to transmit to the wide area radio base means. A mobile radio for mobile communications that can be controlled to