JPH03131132A - Mobile object communication system - Google Patents

Abstract

PURPOSE:To attain an incoming/outgoing call between a portable telephone set resident in an optional location in a service area and other portable tele phone set or between fixed telephone sets by adopting a small zone system using a micro cell for the title system. CONSTITUTION:A portable telephone set PTEL has a function accessing a radio system controller RCE via a fixed radio station FRS in a radio wave and applying automatic position registration. Each portable telephone set has its own identification information ID different from other portable telephone sets. The fixed radio station FRS demodulates a digital outgoing signal from the radio system controller RCE, converts the signal into a radio modulation wave, which is sent to the portable telephone set PTEL. On the other hand, the fixed radio station FRS receives and demodulates an incoming signal from the portable telephone set PTEL, converts the signal into a digital signal and transmits it to the radio system controller RCE.

Description

DETAILED DESCRIPTION OF THE INVENTION (1) Technical field to which the invention pertains In mobile communication using a small zone configuration, the present invention secures calls to and from mobile terminals at all times from any location within the service area, and It relates to a communication method and system that satisfies the communication quality when the communication quality deteriorates due to the movement of mobile terminals.More specifically, it concerns frequency effective utilization rate 9 communication quality, wireless line control ability, etc. It is related to a communication system that is excellent in terms of communication.

(2) Conventional technology and its problems Generally, when performing mobile communication within a wide service area, one wireless base station covers the entire area and provides service.
The method for communicating with mobile objects within an area is called the large zone method. In contrast, the small zone method
The area is divided into multiple small areas, one wireless base station is installed in each divided area, and mobile wireless devices in each area communicate with these wireless base stations. be.

The conventional small zone method, for example, is currently in commercial service.
It is adopted in the TT's car telephone system (Reference: Yoshiyuki et al. ``Car telephone radio line control'' Nippon Telegraph and Telephone Telecommunications Research Institute Research and Practical Application Report Vol.

26, Nα7, page 1885].

First, as a method for processing incoming calls to mobile devices that move anywhere within a service area, a method is used in which calls are made all at once only in areas where mobile devices are known in advance.

Location registration is performed by notifying the mobile telephone exchange of the location of the mobile device. A signal regarding location information for location registration is sent to the incoming call control channel on which the mobile station is waiting, and this signal is made different for each paging area. A mobile device registers its location by automatically transmitting a location registration signal when it detects a change in a location information signal.

The next time the mobile station makes a call, it uses the outgoing control channel available in the control zone where the mobile station is located. In this case, since the number of the outgoing control channel is always broadcast on the incoming control channel, the mobile device memorizes this number and uses the channel that is marked empty (idle line control method). On the base station side, as mentioned above (radio waves from the mobile device are received by multiple wireless base stations, and as a result, the wireless zone where the mobile device is located is identified and located), an empty communication channel that can be used in that wireless zone is used. By specifying , you can make a call.

Furthermore, incoming calls will be explained. The mobile station is waiting on the incoming call control channel. When the mobile station moves to another control zone, it is necessary to switch to the incoming control channel used in the disconnected control zone.

Therefore, when the reception level of the incoming control channel falls below the required value, the mobile device has a function that selects and captures the channel that is received at the required level or higher from among the multiple channels allocated for incoming call control. identifies the control zone.

Therefore, when a mobile phone receives a call from the fixed telephone network, the mobile telephone exchange can make a simultaneous call from all wireless base stations within the control zone (or zones) in which the location is registered. mobile base stations will be called.

The above is an overview of systems in practical use, but various problems will occur if a system as described below is constructed.

(2) In order to increase the number of subscribers (number of mobile phones) accommodated in the system by one order of magnitude more than the conventional system, from 100,000 to several million, the zone radius must be reduced by more than one order of magnitude. In this case, if radio line control is centrally managed as described above, ultra-high-speed control will not be possible due to control traffic congestion due to the generation of multiple control signals and the absolute delay time that occurs in signal transmission from the radio base station to the radio line control station. It becomes possible.

■It can be used not only inside a car, but also when a person can take it out of the car and use it while walking. This is the first step toward realizing the ultimate telephone, a system that allows calls to be made anytime, anywhere, and anywhere, but in order to achieve this, it is necessary to downsize mobile radio equipment.

■To improve usability, for example, lengthen the battery charging cycle (
Therefore, the wireless transmitter output must be low M (5W).
It is necessary to save power, including from 10mW to about 10mW.

■It is necessary to maximize the utilization efficiency of the frequencies used.

This is a major premise for realizing a system that can accommodate subscribers with a large capacity of several million.

One system proposal (draft) that satisfies these requirements has already been proposed by the inventor of the present application [Reference, Ine: Mobile phone system study - 1''' electronic communication centering on wireless line control and routing. Academic conference technical research report C387-
16 May 1986].

According to this proposal, the following conditions are met:

■The number of subscribers accommodated in the system can cover all citizens of our country.

It is possible to realize a size that can be carried by 0 people.

■It can be made as small and lightweight as a cordless phone.

However, the transmission power is about 10 m.

■Assuming a radius of approximately 25 m as the size of the wireless zone, a required frequency band of 2 to 3 MHz is sufficient.

■Decentralize control, such as having each mobile phone take the lead in system control.

[Phase] One set of transmitter/receiver, that is, one wireless channel, is sufficient for the wireless transmission and reception capability of the mobile phone master device.

(2) In addition to having multi-channel access capability, the transmitter/receiver in the [Phase] section also has radio line control capability, ie, control channel usage capability, and radio channel communication capability, ie, communication channel usage capability.

Further, regarding the location registration of a mobile phone, which is a problem in a system that adopts the extremely small zone method with a radius of 25 m as described above, the following document has been proposed.

[Reference: Ito "Study of mobile phone systems - Proposal of multiple location registration and application to system operation - Institute of Electronics, Information and Communication Engineers technical research report RC388, September 1988" Using this proposal, the following problems can be solved: is what happened.

■In a small zone system that uses small zones (microcells) with a radius of 25 to 100 m, the service area per radio base frequency is extremely narrow, and the distance between the transmitting antenna and the receiving antenna is short, resulting in short-range radio wave propagation characteristics. It is an area that follows the above, and has a complex appearance due to the influence of topography and features.

In a service area in such a state, if a mobile device registers its location, many wireless base stations will be able to receive signals from the mobile wireless device, making it difficult to determine which area the mobile device is in. However, they decided to register their locations with multiple wireless base stations that received good signals. As a result, making and receiving calls has become easier.

■The use of control signals for location registration is reduced, reducing radio wave interference.

0 frequency (radio waves) can be used effectively.

■It becomes easier to take measures when comparing call traffic congestion, and call losses are reduced.

■Transmit and receive diversity can be easily applied,
This can be used to improve call quality.

Although the above advantages have been revealed, no concrete system proposal has been made yet.

As a method to solve this problem, the inventor of the present application has developed a system that utilizes the fact that each mobile phone has self-identification information (abbreviated as ID) to identify that it is different from other mobile phones. In order to make calls smoother, it was proposed that calls should be divided into groups (Group-based) (Patent Application No. 1-1).
92649).

For example, when rD is expressed in decimal notation, there is a system that is divided into two groups depending on whether the last digit is an odd or even number, an ID that is divisible by ``3'', an ID that has a remainder of ``1'' when divided by ``3'', and an ID that has a remainder of ``1'' when divided by ``3''. Some are divided into three groups, including those with a value of "2".

This method solves the problem of not being able to respond immediately to calls, but statistically speaking, even if the probability is small, I
If mobile phones belonging to the same group D were concentrated in the same place, there was a possibility that signal collision would occur, making it impossible to make calls smoothly.

In addition, as a fixed wireless configuration that allows many people to talk to multiple fixed wireless stations at the same time, multiple sets of transmitters and receivers are installed at the same location, and these are controlled by a multiple fixed wireless station control unit that is a common control unit. A method has also been proposed in which fixed radio station transmission during standby is controlled to only one station at the same time using signals from the station (see Japanese Patent Application No. 1-183632). Each receiving section of n sets of transceivers (n fixed wireless stations) is in a standby state to receive a signal from a mobile phone, while the transmitting section is in a standby state when the synthesizer output is transmitted under control from a plurality of fixed wireless station control sections. This method enables immediate transmission of notification signals, incoming call signals, or response signals to mobile phones. In addition, the multiple fixed wireless station control section applies the synthesizer output to the transmitting section of only one fixed wireless station at the same time so as not to transmit the above three types of signals to the mobile phone from multiple fixed wireless stations at the same time. Switch circuit on.

This is a method of controlling by turning off.

This method is certainly effective, but it requires a control station to control multiple fixed wireless stations, which may be somewhat expensive economically, and if this control station becomes a problem, all fixed wireless stations will be unable to make or receive calls. There is a risk that

Furthermore, a method is also being considered in which the broadcast signal sent from a fixed wireless station is checked (called carrier sense) to make sure that it is not being transmitted from a nearby fixed wireless station before being sent out (specially known as carrier sense). (See Ganpei No. 1-43043)
. This method is certainly effective, but if there are many fixed wireless stations in the vicinity, for example 10 or more, carrier sense will have to be performed many times, and two or more fixed wireless stations will broadcast simultaneously. As the probability of transmitting signals also increases, the possibility of signal collision increases and calls may not be made and received smoothly.

(3) Purpose of the Invention The purpose of the present invention is to provide a mobile communication system using micro cells based on the above conventional technology, which has a high frequency utilization rate, can accommodate subscribers with a large capacity, and has a high call traffic density. It is an object of the present invention to provide a mobile communication system capable of constructing a system with high serviceability that can smoothly process a large number of calls even within an area.

(4) Structure and operation of the invention Figure 1 shows the present invention in a large-scale high-rise building
This is an example in which the present invention is applied to a system whose service area is within the 1st floor (21st floor above ground).

In the figure, a switching device PBX has an interface function with a public line CO and a radio control device which is a main component of the system of the present invention.

The system of the present invention is a radio system control device (radio system control device RC).
E), fixed wireless station (fixed wireless station FR3), mobile phone (
The system consists of a mobile phone (P), and provides a service that allows calls to be made from anywhere within the service area, at any time, and to any location.

However, the above-mentioned service content is limited to
It is also possible to perform the process between a mobile phone P and a fixed telephone set in a building, or between a mobile phone and a telephone installed on an outside line (beyond a private branch exchange).

The feature of the present invention, as already mentioned, is that the center of decision-making for mobile phone location registration and call/call operations is placed in the terminal, rather than in the center of the wireless system control device, etc., as in conventional systems. As a result, the load on the central wireless system control device is lightened, and the work speed is increased.
This makes it easy to add more terminals and expand the system.

Furthermore, when using wireless channels to transmit and receive control signals used when making and receiving calls when registering the location of a mobile phone, we will use radio channels to effectively utilize frequencies and improve the quality of signal transmission. Configure wireless channels individually,
This enables optimal design of wireless systems.

Each component used in the configuration of the present invention shown in FIG. 1 will be explained in detail below.

(il mobile phone (P) It is a device that people carry around, and it is portable and easy to operate.

Must have excellent maintainability. It has a function to wirelessly access the radio system control device RCE via a fixed radio station (FR3) and automatically perform location registration. In addition, when a person moves from place to place due to walking and it becomes necessary to register the location with another fixed wireless station, the same operation as above is used to access the wireless side '411 device RCE and change the location registration. Has a function. Call operations can be made or received from any location within the service area. Therefore, each mobile phone has self-identification information (abbreviated as ID) to identify that it is different from other mobile phones. If it becomes necessary to change the fixed wireless station FR3 (zone switching) that is communicating with the opposite station due to walking during a call, the conventional system may not be able to do so, or may have negative effects such as cutting off the call information. However, according to the present invention, as will be described later, a method that does not have these adverse effects is possible.

FIG. 2 shows the hardware configuration of the mobile phone IP device.

In FIG. 2, a radio signal transmitted from fixed radio station FR3 is received by a receiving antenna.

This received signal is divided into two parts by a shared device and inputted to receivers I and (2), respectively. In the receiver I, the signal is amplified to the required level and then demodulated, and a part of it is sent to the control unit CPU (
200 bps control signal), and the other output is divided into two, one of which passes through switch SW1 and is manually input to the receiver, and the other passes through a decoder and is input to the control unit CPU (2400 bps control signal). The control unit CPU has a storage unit, a switch, a keyboard, and an interface, and each has the functions indicated in the name.

Next, the signal input to the receiver (2) also has the same wiring configuration as the receiver (2) as shown in FIG.

The switches S W + and SWt are driven by the control unit CPU via the switch driving unit.

That is, in synchronization with turning the switch SWI to ■ or ■ so that the audio signal of either receiver I or H is input to the receiver, the audio signal is obtained by the switch SW's at the output of receiver I or ■. Select a control signal and input it to the decoder.

Similarly, switch SW2 determines the receive if or ■ used in conjunction with the transmitter. In addition, the synthesizer (2) or (3) receives a command signal for the wireless channel to be generated from the control unit CPU, generates a local oscillation output of a desired frequency, and transmits the signal to the receiver I.
or ■ and supply to the transmitter. The output for field strength measurement is supplied from the receiver (1) or (2) to the control unit CPU.

This is used when changing the zone of the mobile phone P, which will be described later.

Three inputs are applied to the transmitter. One is the transmitter output, and the other is the control signal from the control unit CPU and the control unit CP.
This is a high-speed signal of 2400 bps that has passed through the encoder from U. These are converted into radio signals by modulation at the transmitter, applied to the transmitting antenna, and transmitted to the radio base station.

Note that the control unit CPU shown in FIG. 2 has a built-in timer part (not shown), and stops the emission of radio waves at a certain timing as described later.

It provides timing determination information regarding reception or stop of reception of signals transmitted from the fixed radio station FR3.

(iil fixed radio station (FR3)) Demodulates the digital downstream signal from the radio system controller RCE (from the radio system controller RCE to the mobile phone P location), converts it into a radio modulated wave, and sends it to the mobile phone P location On the other hand, it receives and demodulates the uplink signal from the mobile phone P (direction from the mobile phone P to the radio system control device RCE),
It is changed into a digital signal and transmitted to the radio system control device RCE.

Each fixed wireless station installed in a service area where normal call traffic occurs is equipped with self-identification information (abbreviated as SID) in a set of transceivers to identify it as different from other fixed wireless stations. ). On the other hand, in service areas with high call traffic, even if the above-mentioned fixed wireless stations are installed, calls with mobile phones may not be carried out smoothly. A method has been adopted in which a transmitter/receiver is provided.

Below, the functions of these fixed radio stations will be explained in order: first, a fixed radio station equipped with only one set of transceivers, and then a fixed radio station equipped with multiple sets of transceivers.

FIG. 3 shows the hardware configuration of the fixed radio station (fixed radio station FR3).

In FIG. 3, a radio signal transmitted from a mobile phone P is received by a receiving antenna.

This received signal is divided into three parts by the shared equipment, and the equipment receiver 1.
II and ■ are input. In receiver I, the signal is amplified to a required level, demodulated, and divided into three parts. One of them is sent to the control unit CPU via the decoder (240
0 bps control signal), and the other is a 200 bps control signal sent to the control unit CPU via switch SW.
Switch SW.

This is the signal sent to the FR3/RCE interface via the FR3/RCE interface. The control unit CPU has a storage RAM and an interface.

Next, the signal input to the receiver (2) also has a wiring configuration similar to that of the receiver (I) as shown in FIG.

The switches 5WII and S W +□ are driven by a switch driving section under the control of the control section CPU.

That is, in synchronization with the switch SW, , being turned down to ■ or ■ so that either the received ml or H audio signal is manually input to the FR3/RCE interface, the switch SW, , sends the signal to the control unit CPU. A low speed control signal (200 bps) to be input is selected.

Similarly, the switch S W + z determines which receiver I or ■ will be used in conjunction with the transmitter. Also, synthesizer I,
II or ■ receives a command signal for a wireless channel to be generated by the control unit CPU, generates a local oscillation output of a desired frequency, and supplies it to receivers I, II and ■ and the transmitter. This is used when switching the zone of the mobile phone P, which will be described later.

The receiver ■ plays the role of an interference detector, and before emitting radio waves from the transmitter, it checks whether a mobile phone P using the wireless channel is nearby and will not cause interference. used for.

Three inputs are applied to the transmitter. One is the voice signal of the other party, and the other is the control signal from the control unit CPU and the high-speed signal 2400b passed through the encoder from the control unit CPU.
ps, and these are converted into radio signals by modulation at the transmitter, added to the transmitting antenna, and transmitted to the mobile phone P.

Note that the control unit CPU shown in FIG. 3 has a built-in timer (not shown), and at certain timings can change the mode of the broadcast signal transmitted by the fixed radio station (FR3), etc., as described later. Provides timing decision information regarding radio wave emission stops, etc.

The above is a case in which one fixed wireless station is equipped with only one set of transceivers, but below, a fixed wireless station equipped with multiple sets will be explained. This fixed radio station is called a plural fixed radio station, abbreviated as plural FR3. For fixed wireless stations that can handle high-density traffic areas, the concept of zone-based location registration is introduced in the service zone managed by the fixed wireless station. With the introduction of this concept, zones can be distinguished. In the case of multiple FR3s for control purposes, if any representative FR3 among them is called a master FR3 (other FR3s are slaves), the self-identification information possessed by this master FR3 (SID). However, the relationship between the master and slave described above is not constant and changes from time to time. That is, when the master FR3 starts communicating with a certain mobile phone, the FR3 that was in the slave state is changed to the master.

For example, a certain plurality FR3 has four sets of transceivers FR3, (
When the power is turned on, this normally becomes the master FR3), F
R3, FR33 and FR34 are provided, and their respective self-identification information is 5IDa, 5IDb, 5I.
Dc and 5IDd, the self-identification information representing the plurality of FR3 is given by 5IDa, which is the self-identification information of the FR3 which is the master FR3 at that time. Furthermore, even if the master FR3 is involved in a call and another slave FR3 is changed to the master, the registered 5IDZ (SIDa) remains unchanged.

-A-wise, the self-identification information of the service zone of multiple FR3 is the master FR owned by multiple FR3.
If the self-identification information possessed by R3 is expressed as 5 IDZ, location registration control based on this information will be performed in units of 5 IDZ, and location registration management within the RCE will be performed in units of 5 IDZ. However, when the master FR3 is in communication with the mobile phone, the slave FR3 can be transferred to the master FR3 by a management method such as younger number order.

Hereinafter, using FIG. 14, it will be explained specifically how the above operation can be executed.

FIG. 14 is a configuration diagram of the multiple FR3, with n radio base station units on the left) 1.2. ..., n are installed, and these and the right main unit are connected by a pass line and a signal line as shown. The main unit has the function of commonly controlling multiple radio base stations on the left, and includes a "common RAM circuit (CRAM)", a "CRAM access right determination circuit" that determines access rights, and unit control. It consists of a chain control circuit for chain connection for the right.

Each of the configurations shown in FIG. 14 will be explained below.

First, CRAM will be explained. The CRAM is used to save data shared by the installed units, and the data mainly includes location registration information 2, incoming call information, etc. What is noteworthy about the hardware configuration is that this CRAM is just a storage circuit and does not contain any complex functions such as a general control circuit such as a CPU or signal transmission circuit. Therefore, since it can be equivalently regarded as a passive circuit, there are fewer disturbances and it is economical.

Next, the CRAM access right determination circuit receives the CR from the unit.
A handshake method is adopted in which an access request is issued to the AM access right determining circuit, and in response, the CRAM access right determining circuit issues permission to access the requesting unit. Furthermore, if access requests are received from multiple units almost simultaneously, only one unit designated by the access right determination circuit becomes the access circuit.

Furthermore, when a call (including call/receiver 1 location registration control) occurs, the chain control circuit performs selection control to cause only one unit among the plurality of units in a standby state to respond to the call.

Then, a priority is set for each installed unit, and a status signal indicating the status of the unit (standby/talking) output from each unit is input, and one of the units in the standby status is Select a unit and give it the right to answer the call.

Furthermore, even when all the installed units are in a talking state, the system has a function of selecting the unit with the highest priority among them.

Table 1 shows a unit selection method for 3ch FR3 as an example. If there is a unit that is not mounted, this state can be handled in accordance with Table 1 by making it appear to be in a busy state.

Table 1 The hardware configurations of the CRAM access right determination circuit and chain control circuit described above are also configurations that can be regarded as passive circuits that are almost the same as simple logic switch circuits, similar to the CRAM circuit, and are economical with few failures.

Furthermore, the radio base station unit is technically equipped with all the control and B functions as a single FR3, transmitting and receiving functions, and the function of outputting its own status to the chain control circuit inside the FR3 main body as shown in Figure 14. ing. The output in this state is binary: standby state/talking state.

The hardware configuration of the multiplex FR3 has been explained above, but as will be described later, the control of outgoing and receiving calls between the mobile phone and the fixed wireless station is the same in the multiplex FR3 as in the normal fixed wireless station. This is possible in units of station self-identification information (SID).

(iii) Radio system control equipment (RCE) The radio system control equipment (RCE) has a one-to-one correspondence between the fixed radio station (FR3) that covers the radio wave zone at the location of the mobile phone (P location) and the mobile phone P location. This is a device that connects the PBX extension line of the related exchange device at the time of outgoing/receiving calls to form a communication path.The radio system control unit RCE consists of a communication path of a PCM switch, and is connected by a microprocessor.

A block diagram of the radio system control device RCE is shown in FIG. In FIG. 4, the location registration from the mobile phone P and the fixed radio station FR3 that notified it are linked and stored in the storage unit MEM. When there is an incoming call from the extension telephone IF of the exchange PBX, an incoming call signal with the ID of the called mobile phone P added is transmitted to all fixed radio stations FR3 under its control. The fixed radio station FR3 that received this searches its own storage unit (RAM), and if the ID of the called mobile phone P is selected as a result, the fixed radio station FR3
Then call the mobile phone P location. and exchange device P
Connect the communication path between the BX extension and fixed wireless station FR3.

In the case of a call from the mobile phone P, the call is received via the fixed radio station FR3, and the call is sent to the extension telephone F of the exchange PBX that has a corresponding relationship with the mobile phone P. Then, the communication path between the extension of the switching device PBX and the fixed radio station FR3 is connected. When the fixed radio station FR3 that is currently on the line sends a call termination notification, the call path is disconnected.

The main functions of the radio system control device RCE are as follows.

a) Manage the one-to-one correspondence between extension telephones F and mobile telephones P of the switching device PBX.

b) The location registration from the mobile phone P is linked and stored with the fixed wireless station FR3 through which it passed.

C) When a call is received from extension telephone F of the exchange PBX, the vacant fixed radio station FR3 to be connected is selected and both are connected.

d) When making a call from mobile phone P, determine the extension of the exchange PBX to be connected, and connect the two.

e) Dial from the P position of the mobile phone during a call.

The hooking signal is transmitted to extension telephone F of the exchange PBX.

f) When the mobile phone P moves to another radio wave zone during a call, the mobile phone P is reconnected to the fixed radio station FR3 there.

g) When a call is notified from fixed wireless station FR3 during a call,
Disconnect the communication path. The extension telephone F, fixed radio station FR3, and mobile phone IP of the related switching device PBX are made vacant.

The radio system control device RCE described above, the fixed radio station FR3,
The system operation that comprehensively operates the mobile phone P station will be explained.

The system according to the present invention employs a distributed control method instead of a centralized control method.

The system is divided into two sections: a wired section between the radio system controller RCE and the fixed radio station FR3, and a radio section between the fixed radio station FR3 and the mobile phone P and 10.

When there is an incoming call, the radio system control device RCE notifies the fixed radio station FR3 of this.

When receiving a line setting request from the fixed radio station FR3, the designated line is connected in accordance with the request.

Communication is relayed from one fixed radio station FR3 to another fixed radio station FR3.

When receiving incoming call information from the radio system control device RCE or when receiving a call request from the mobile phone P unit, the wireless line is set, but the selection of the wireless line at this time is made by the mobile phone P unit. .

In the location registration, the mobile phone P checks the fixed wireless station FR3 that can provide its own service, directly or indirectly notifies the fixed wireless station FR3 of the result, and registers itself.

Furthermore, the call lines are set in the order of wireless line and then wired line.

Therefore, when a call occurs, the fixed radio station FR3 is first selected by the mobile phone PTEL, and a radio line is set up.

The fixed radio station FR3 selected as a result instructs the radio system control device RCE to connect to an external line and complete the setting of the call line.

As described above, control is decentralized by making the mobile phone P the center of decision-making in location registration and line setting operation registration when making and receiving calls.

Distributed control reduces the load on the radio system control device RCE, and at the same time, the radio line setting can be performed in the minimum interval between the fixed radio station FR3 and the mobile phone P device, so that the line setting time can be shortened.

Furthermore, unlike conventional systems, the control wireless channel is not limited to one channel (more precisely, one channel per wireless zone), but multiple channels can be used simultaneously for different purposes such as location registration, outgoing calls, incoming calls, etc. did. For example, control channel a (Pc-ch
) is the location registration channel, and the notification 2 described below is the location registration channel.
Perform location registration and location registration deletion. On the other hand, control channel b (abbreviated as Cc-ch) is a call originating/receiving control channel, and incoming call 1 originating zone switching is performed. In addition, transmission.

Although it is possible to allocate separate channels to each incoming call, the following explanation will be based on the case where one channel is allocated to each incoming call. The reasons for using a plurality of control radio channels as described above are as follows.

■ Processing capacity is significantly increased compared to the case of one.

Simply thinking about this, if you use two, you can expect double the processing capacity, and if you use three, you can expect the processing capacity to be tripled, but as described in ①, the signal format can be unified, and the signal traffic Since the efficiency can be improved, even higher processing capacity can be expected.

■The format of the signal related to location registration 2 calls is shown in Figure 5 (C), (d), (e), [Yes]),
As shown in (j2), they are different from each other, and therefore, if transmission and reception are performed using one control channel, there will be a gap between one signal and another signal, resulting in inefficiency. On the other hand, efficiency can be expected to improve if the number of formats is reduced to only - or even if the number of types is reduced to one.

■For example, when a certain mobile phone transmits a location registration signal, it monitors in advance the device registration signals made up of other nearby mobile phones, and then monitors the transmission timing when it is sent from a fixed wireless station. By transmitting signals in accordance with the above, it is possible to prevent signal collisions, eliminate radio wave emission, reduce interference, and make effective use of frequencies.

■2400 bps for location registration, 1200 bps for making and receiving calls
It becomes possible to set control signal speeds such as ps separately for each type of system operation, and it becomes possible to set signal reliability and traffic density to optimal values for each system, making design easier.

As a result of ■■-■, the system operates quickly and wasteful connection delay time is reduced.

In addition, the control signal speed for wireless line control is set to 2400.
By increasing the speed to 100 bps and using an out-of-band control signal of 100 ports in the call state, it is possible to further reduce the line setup time and the time occupied by the control channel. .

Assuming the above configuration and conditions, the operation of the system of the present invention will be explained as follows: fi) location registration relationship, (ii) incoming call, (ii)
i) Calling and Gv) Zone switching will be sequentially explained below.

However, the above operation when a plurality of sets of transceivers are provided in one fixed wireless station will be explained together at the end.

However, if a "bait" IW call occurs, first the mobile phone P and the fixed wireless station F
Control is performed to set up a wireless link between R3O,
In order to efficiently move mobile phones 41P in the service area, the fixed wireless station FR3 always keeps track of the mobile phone P locations that are within its own service area (zone). Similarly, the mobile phone P needs to always know which fixed radio stations FR3 are located within its own service area (zone). For this purpose, location registration is performed.

In order to smoothly register the location from the mobile phone P location,
Figure 5 (a) which varies depending on the state from fixed radio station FR3
Two types of notification signals as shown in (b) are sent out.

■Notification signal 1 Announcement signal for the purpose of notifying only the mobile phone P location ■Notification signal 2 Notification signal fixed for the purpose of notifying the mobile phone P location as well as transmitting incoming call information including incoming call information The following three modes are set for the broadcast mode of radio station FR3. (See Figure 6) (a) Quiet mode In this mode, only Pc-ch and Ccch are monitored.

(II+) Announcement mode 1 When in this mode, on the PC-ch, if incoming call information is generated, announcement signal 2 is generated, otherwise, announcement signal 1 is sent for 20 seconds at intervals of 4 seconds ±α. Send intermittently.

(c) Announcement mode 2 When in this mode, on the PC-ch, if incoming call information is generated, announcement signal 2 is generated, otherwise, announcement signal 1 is transmitted for 10 minutes at intervals of 4 seconds ±α. Send intermittently.

Location registration is performed by interaction between fixed radio station FR3 and mobile phone P for each zone as follows.

Basically, the fixed radio station FR3 needs to perform notification (sending out control signals) while the mobile phone 1iP location is within its service area, and when the mobile phone 1iP location is within its service area. If it is determined that the system is not operating, it stops the notification and enters a static mode.

This determination for mode transition is made independently in each fixed radio station FR3 as follows.

■ Fixed wireless station FR3 is in the call state 2 when the power is turned on and
When the state transitions from the incoming call state to the standby state, it is necessary to determine whether or not the mobile phone P is within its own service area.

Therefore, notification mode 1 is entered unconditionally.

(2) If no notification request signal or location registration request signal is received from the mobile phone P during the notification mode 1, the stationary mode is entered after the notification mode 1 ends as shown in (2).

■ If a notification request signal or a location registration request signal is received from the mobile phone P station during notification mode 1, it is determined that the mobile phone P station is within the area, and from that time on, notification mode 2 is entered. .

■ If the fixed radio station FR3 is in the stationary mode and incoming call information is generated, it enters the broadcast mode 1 from that time.

■ In addition, when in stationary mode, if a notification request signal or a location registration request signal (these are sent on control channel a dedicated to location registration) is received from the mobile phone P location, the mobile phone IP location is located within the area. It is determined that the system is running, and the system enters notification mode 2 from that time.

■ If no notification request signal or location registration request signal is received from the mobile phone P during the period of notification mode 2, it is determined that the mobile phone PTEI- is not in the area, and notification mode 2 is terminated. do.

■ At this time, if incoming call information occurs during the period of notification mode 2, and if 20 seconds or more have elapsed since the occurrence, the stationary mode is entered.

- After notification mode 2 ends, if incoming call information occurs during notification mode 2 and 20 seconds or more have not elapsed since the occurrence, notification mode 1 is entered.

Next, regarding the location registration control of fixed radio station FR3, the 12th
This will be explained using the operational flow shown in the figure. When the fixed wireless station becomes operational, it starts transmitting the notification signal 1. This transmission continues until timer 1 times out. If the fixed radio station FR3 receives a location registration request signal from the mobile phone P TEL while transmitting broadcast signal 1 or 2 (broadcast mode (1, 2)) or in stationary mode, When the own SID is included in the signal, location registration processing is performed for the PID included in the signal, and a location registration response signal is transmitted to the mobile phone P location.

When this is completed, the transmission of the notification signal 1 continues as it is. Further, when the above-mentioned signal from the mobile phone IP is not received, the system waits for the occurrence of incoming call information, but if it occurs, then the notification signal 2 is transmitted and the notification operation is continued.

In addition, if the incoming call information does not disappear, the operation of notification signal 2 is continued, and when the notification signal sending period timer ends, the notification signal 1 is sent and then the mode is shifted to the stationary mode. This will be used to receive notification request signals, etc. from It should be noted that if the incoming call information disappears among the above, the operation shifts to the notification signal 1 from this point.

Note that the location registration process involves creating a PID registration table (Table 2) in its own memory (storage unit in Figure 3), registering the PID included in the signal there, and This is notified by sending a location registration request command to the system control device RC.

Here, the electric field strength is the received electric field strength of the location registration request signal, and the registration timer starts from the time of registration and is a maximum of 180 times/10 seconds (30 minutes). Furthermore, the in-area state is set to the in-area unknown state when an incoming call occurs and the incoming call is subsequently abandoned, and when a notification of an incoming call timer error is received from the radio system control device RCE. Furthermore, if the location of the mobile phone P is confirmed, such as by receiving a signal from the mobile phone P whose location is unknown, it is determined that the mobile phone is in the area.

Table 2 Next, the details of fixed radio station FR3 will be explained.

When a location registration deletion request signal is received from the mobile phone P, the fixed wireless station FR3 specified by the signal (fixed wireless station FR3 whose location registration is to be deleted) is specified only if its own SID is included in the signal. ) via the radio system control device RCE, and the mobile phone P
A location registration deletion response signal is sent to the location.

The fixed wireless station FR3 that has received the notification deletes the corresponding PID from its own PID registration table.

FIG. 7 shows a flowchart of the location registration operation.

Next, the first part about location registration control from the point of view of mobile phone P.
This will be explained using the flow diagram shown in FIG.

The mobile phone P receives the broadcast signal from the fixed wireless station FR3, checks the field strength, and if it is above a certain value, determines that its own service is possible and registers its location with the fixed wireless station FRS. At the same time, the fixed radio station FR3 whose location has been registered is registered in its own internal table shown in Table 2.

Therefore, in order to notify the mobile phone of its own presence and prompt the transmission of a notification signal, the mobile phone P transmits a notification request signal to the fixed radio station FR3 when the power is turned on and when it transitions from the talking state to the standby state.

Fixed radio station FR3 receives this signal and notifies mobile phone P that it has received the notification signal. If your mobile phone receives this signal, it will use the SID as explained below.
Shifts to search operation, but if reception is not possible, the fixed wireless station F
The notification request signal is transmitted after, for example, 10 seconds have elapsed since the notification from R3 can no longer be detected (permissible time for non-detection of notification = 4 seconds x 2.5: notification period).

Furthermore, in addition to this, even when receiving a broadcast signal from the fixed radio station FR3, if the reception level is below a certain value and the broadcast signal is received a specified number of times, a broadcast request is transmitted from the mobile phone P.

Now, when a notification signal is received, the device searches its own internal "'SID registration table" (storage unit in FIG. 2) for the SID included in the signal.

As a result, if the fixed wireless station FR3 that sent the received broadcast signal has already registered its location, the location registration information (“field strength” and PA registration timer) associated with that SID will be updated, but the location If it is a fixed wireless station that is not registered and is not registered, this means that the mobile phone P location has been moved and a new swc
Fixed wireless station station F that has moved to the zone and is located there
Since this is the case where the notification signal is received from R3, the location registration operation is executed.

As the location registration process, a location registration request signal is transmitted, and the station waits to receive a location registration response signal from the fixed wireless station FRS. After that, if a location registration response signal is received within the specified waiting time, the 'SID
``Electric field strength'' and °° registration timer'' are registered.

If the location registration response signal is not received, the location registration request signal is retransmitted. If it is not received even after retransmitting the specified number of times, it is assumed that the location registration has failed and the registration in the "'SID registration table" is not performed.

Now, in the above case, if a certain period of time passes without receiving the notification signal from the fixed wireless station while the mobile phone is registered with the fixed wireless station FR3, the registration status of the mobile phone with the fixed wireless station changes. It will be in a "deregistration pending state". When this state is reached, a location registration deletion signal to which the SID of the fixed radio station FR3 in the "deletion pending state" is assigned is transmitted to the fixed radio station FR3 that has newly completed location registration from now on. When fixed wireless station FR3 receives a location registration deletion signal from a mobile phone, only if its own SID is included in the signal is the fixed wireless station FRS designated by the signal (the fixed wireless station for which you want to delete location registration) station FRS)
In response, the radio system control device RCE notifies this and also transmits a location registration deletion response signal to the mobile phone P.

Fixed radio station FR3, which has received the notification, deletes the corresponding PID from its own P[D registration table"'.

In addition, if there is no information of "registration pending state" in the above, when it is determined that the fixed wireless station FRS is close to the registration boundary state (due to a decrease in the received electric field) due to movement, a broadcast request signal is transmitted according to the broadcast request cycle, If you do not make the above judgment or the timer is about to expire and there is no information on the registration confirmation status,
He must be near another fixed radio station FR3, and will be trying to receive the broadcast signal.

Finally, location registration control in the radio system control device RCE will be explained.

The radio system control device RCE does not have a direct judgment function regarding location registration control, and only manages result information regarding location registration notified from the fixed radio station FR3. For management, a "PID-3ID registration table" (MEM in FIG. 4) is generated within the radio system control device RCE, and registration or deletion is performed based on information notified from the fixed radio station FR3.

There are two types of information notified by the fixed radio station FR3: ``location registration information'' and ``location registration deletion information,'' which are notified by a ``location registration request command'' and a ``location registration deletion command,'' respectively.

Furthermore, the radio system control device RCE relays the "location registration deletion command" to a specific or all fixed radio stations FR3 according to the instructions included in the command.

FIG. 11 is a flowchart showing an example of location registration operation.
This is a different representation of what corresponds to the figure.

Furthermore, a description will be given of control when a location registration signal from a mobile phone is received by the multiple FR 3 and this information is transferred to the wireless system control device. In this case, the multiple FR3 determines that the location of the mobile phone has been registered based on the information 5IDZ based on the self-identification possessed by the master FR3, and sends a zone belonging notification to the radio system control device RCE. Upon receiving this signal, the radio system control device RCE generates a zone management table within itself as shown in Table 3. The table shows the situation when a large number of mobile phones register their locations within a certain period of time.

Table 3 The above example is for a multiple FR3 having four sets of transceivers.

(ii) When receiving an incoming call from the exchange PBX, the incoming radio system control device RCE performs incoming control for the call. When performing incoming call control, the incoming call P is stored inside the radio system control device RCE.
It generates an rD registration table (MEM in FIG. 4) and controls incoming calls.

The incoming call setting and connection of the radio system controller RCE is performed in the following order.

(2) At the time of incoming call After registering the incoming PrD in the "incoming PID registration table", the radio system control device RCE sends the incoming call start execution instruction G command to all fixed radio stations FR3.

Upon receiving this instruction, the fixed radio station (FR3) transmits an incoming call signal to the called mobile phone using the incoming control channel. On the other hand, if a nearby mobile phone receives this message, it will check the ID, then search for an empty channel for the call.
When it finds it, it sends the designation of that channel and a wireless line connection request signal back to the fixed wireless station FR3 (see FIG. 8, 5).

■One fixed wireless station FR3 that successfully connected to a wireless line
When receiving a call setting request command, a call setting completion notification G command is sent to all fixed radio stations FR3 to notify that the destination of the call has been determined.

At the same time, the incoming PID is registered in the SID for which the incoming call setting has been made in the "SID status table", and the mode is set to incoming call mode.

■When receiving an incoming call response request command from fixed wireless station FR3, refer to the "'SID status table" and
After confirming that the ID is in incoming call mode, connect the line between the fixed wireless station FR3 and the switching equipment PBX, and
The relevant SID on the SID status table is registered as a mode change to the call mode, and the relevant PTD is deleted from the incoming PID registration table.

This ends the incoming call processing.

Incoming call control for fixed radio station FR3 is performed in the following order.

When receiving the incoming call start execution instruction G command from the radio system control device RCE, the
If the PID is registered in the registration table °°,
Enters the outgoing call state and performs the following outgoing call processing.

(2) The Cc-ch performs a process of transmitting an incoming call signal to the PID specified by the incoming call start execution instruction G command, and waits to receive an incoming call response signal from the mobile phone P.

After that, an incoming call response signal is received from the mobile phone P,
If the own SID is included in the destination SID of the signal, wireless line connection processing is performed under the initiative of the mobile phone P.

■When the wireless line setting is completed and a wireless line connection request signal is received from the mobile phone P, the wireless system control device RCE
It sends an incoming call setting request command to, and notifies all fixed radio stations FR3 of this via the radio system control bag WRCE.

(2) The fixed radio station FR3 transmits a ring tone signal to the mobile phone P in order to cause the mobile phone P to generate a ring tone. after that,
When receiving a large communication signal addressed to itself from the mobile phone P, it sends an incoming call response request command to the radio control device RCE and transitions to a talking state.

This completes the outgoing call process. Figure 8(a)(b)
) shows the state transition diagram in this case.

Next, the Satosen Kaisan Hiro processing will be explained.

The fixed radio station FR3 performs carrier detection for uplink and downlink of Cc-ah. As a result, when it is confirmed that the mobile phone is vacant, an incoming call signal is transmitted to the mobile phone P. After completing the transmission of the incoming call signal, for example, the portable telephone P
Wait for a response from the location.

If there is no response from the mobile phone P during this time, after α seconds have passed after the standby ends, the incoming call signal is sent (retransmitted) again and the mobile phone enters the standby for 1 second. (α is the fixed wireless station F
It is determined by random timing that is independently set for each R3. ) If there is no response from the mobile phone P during this period, the wireless line connection will fail.

The signal elements of the incoming signal are as shown in FIG. 5(e).

The empty communication channel is information for one channel of 5-ch, which has been previously detected as empty by the fixed radio station FR3.

Transmission of a missed call response signal from the mobile phone P in response to this will be explained.

The mobile phone P receives, on Cc-ch, one of the incoming signals received within a maximum of one second from the time it completes receiving the first incoming signal addressed to it from the fixed wireless station FR3.
Select one from the criteria shown below.

(2) The specified 5-ch information in the incoming signal is compared with the 5-ch information that has been previously detected as empty on the mobile phone P side, and an incoming signal with matching information is checked.

(2) Select the signal with the highest signal reception field strength and the best quality from among the incoming signals whose empty 5-ch information matches.

At this time, if there is no signal with the received field strength of the above level, the fixed wireless station FR3 that showed the remaining reception quality
Select the signal received first from O.

■ If it is not possible to select according to ■ or ■, select according to ■ from among the signals that do not satisfy the conditions of ■.

An incoming call response signal containing the SID selected above is returned to the fixed radio station FR3.

Communication channel acquisition is performed as follows.

(2) When the fixed radio station FR3 receives an incoming call response signal addressed to itself from the mobile phone P, it sequentially performs empty detection for the three designated 5-chs. Sky 5-
When the channel is detected, a channel switching completion signal is continuously transmitted to the mobile phone P for about 0.5 seconds. During this time, a wireless line connection request signal from the mobile phone P must be received.

If channel 5-5 is not vacant and if continuous transmission of channel switching completion signals for about 0.5 seconds is completed, the wireless line connection will fail.

(2) The mobile phone P sequentially searches the specified 5-ch and waits for a channel switching completion signal from the fixed radio station FR3. When receiving the channel switching completion signal, it transmits a wireless line connection request signal to the fixed wireless station FR3.

When the mobile phone P cannot receive the channel switching completion signal from the fixed radio station FR3, the mobile phone P performs call return response processing. If this fails, the mobile phone P places the wireless line connection failure and returns to the standby state.

The signal elements of the channel switching completion signal and the wireless line connection request signal are as shown in FIG. 5 ((a) and (h)).

When the fixed wireless station FR3 receives a wireless line connection request signal from the mobile phone P, it sends an incoming call setting request command to the wireless system control devices RC and H, and sends a call setting request command to all fixed wireless stations FR3. The fixed radio station FR3 notifies this fact through the radio system control device RCE, and also continuously transmits a ringing tone signal to the mobile phone P connected to the radio line. The mobile phone P rings the incoming call signal while receiving this.

After this, when there is an operation by the caller on the side of the mobile phone P, a high call signal is transmitted to the fixed radio station FR3 and the mobile phone P enters a call state. When fixed radio station FR8 receives this,
It sends an incoming call response request command to the radio system control device RCE and enters into a talking state.

The signal elements of the incoming ringing signal and the call loud signal are shown in Figure 5 (i) (
j).

(iii) When a calling request is generated, the calling mobile phone P performs calling processing and connects a wireless line with the fixed wireless station FR3.

After the fixed radio station FR3 completes the wireless line connection with the mobile phone P, it sends a calling connection request command to the radio system control device RCE to set up a call line.

In the case of a normal outgoing call, the outgoing call is sent to three fixed wireless stations FR3 among the fixed wireless stations FR3 registered in the ``SID registration table'' (MEM in Figure 2) inside the mobile phone P.
3 is selected and transmission control is performed for this.

In addition, in the case of re-transmission processing, unspecified fixed radio station FR3 (
Transmission processing is performed for all fixed wireless stations FR3 in a standby state.

The transmission operation will be explained in detail below.

When a call request occurs, the mobile phone P location is Cc-ch.
Carrier detection is performed on the downlink (control channel). As a result, when it is confirmed that the space is vacant, the “
Among the SIDs registered in the 'SID registration table',
For example, a maximum of three SIDs with good conditions are selected, and an outgoing signal as shown in FIG. do.

The transmission signal is continuously transmitted for a maximum of one second, and during that time a response from the fixed radio station FR3 is awaited. If there is no response from the fixed radio station FR3, the normal transmission has failed and retransmission processing begins after 1+α seconds have elapsed. Here α is the fixed wireless station F R'
It is determined by random timing that is independently set for each S.

5IDa-c... Arrange in descending order of condition by destination SID. This sequence becomes timing information to which the fixed wireless station FR3 responds.

cha=c...In the empty call channel information, among the 5-ch (call channels) that have been previously detected as empty on the mobile phone P side, the channels are arranged in descending order of confirmation time.

FIG. 9 shows a state transition diagram in this case.

When the fixed radio station FR3 receives an outgoing signal from the mobile phone P and its own SID is included as the destination SID, the fixed radio station FR3 sequentially transmits the outgoing signal for the 5-ch specified in the signal. search for. As a result, if empty 5-ch is detected, 5-c with the latest confirmation time among the Sch
The transmission response signal shown in Fig. 5 (6) carrying h is sent to the destination S.
It is transmitted to the mobile phone P at the timing specified by the ID sequence.

When mobile phone P receives a call response signal from fixed radio station FR3, it selects a signal that satisfies the following conditions from among them.

■ Regarding the empty 5-ch information specified in the outgoing response signal, the 5-ch that has been previously detected as empty on the mobile phone P side
Compare the information and find out which signals have matching information.

(2) Select the signal with the highest received signal field strength from among the outgoing responses whose empty 5-ch information matches. At this time, L
4 (value when the received electric field strength is divided into 5 levels,
The electric field strength becomes weaker as the value becomes smaller. ), the first received signal is selected from the remaining L3.

If it is not possible to select according to ■■ and ■, select according to ■ from among the signals that do not satisfy the conditions of ■.

When the mobile phone P detects the call response signal as described above, it transmits a fixed radio station FR3 designation signal to the fixed radio station FR3 that transmitted the signal. After this, both the fixed radio station FR3 and the mobile phone P device start to acquire a communication channel.

Communication channel acquisition is performed as follows.

(2) When the fixed radio station FR3 receives the fixed radio station FR3 designation signal from the mobile phone P, the fixed radio station FR3 sequentially performs empty detection for the three designated Schs in accordance with the signal. When the empty 5-ch is detected, a channel switching completion signal is continuously transmitted for about 0.5 seconds to the mobile phone P.

(2) The mobile phone P sequentially searches the specified 5-ch and waits for a channel switching completion signal from the fixed radio station FR3. When receiving the channel switching complete signal, it transmits a line connection request signal to the fixed radio station FR3.

When the fixed radio station FR3 receives a line connection request signal from the mobile phone P, it sends an outgoing connection request command to the radio system control device RCE, and also connects all fixed radios via the radio system control device RCE. The station FR3 is notified of this fact.

The mobile phone P enters the talking state from the time it completes sending the line connection request signal.

(iv) Zone switching Zone switching will be explained below.

A call is generated, the outgoing or incoming call processing is executed, and after completion, the call state is entered. During a call, it is possible to send dial signals to the line and send and receive voice signals, but the state of the wireless line may change due to movement of the mobile phone P or movement of obstacles (including people) around the line. changes occur.

For this reason, the status of the wireless line is managed by mutually monitoring the received field strength between the mobile phone P and the fixed wireless station FR3, and radio line management such as zone switching processing and out-of-service processing is performed as necessary. Perform processing. In addition, control signals are transmitted outside the voice band (
Svo-ch).

When the mobile phone P moves during a call and the distance between it and the fixed radio station FR3 with which it is communicating increases and the call quality deteriorates, zone switching is performed.

The mobile phone P position has the received field strength of fixed wireless station FR3,
Or, when the received electric field strength at the own fixed radio station FR3 decreases below a certain value due to the terminal confirmation signal from the fixed radio station FR3, the signal shown in Fig. 5 (m) is sent to the fixed radio station FR3.
A monitor request signal such as the following is sent.

When the fixed radio station FR3 receives the same signal from the mobile phone P, it sends a monitor request command to the radio system control device RCE. As a result, all fixed radio stations FR3 in standby state will receive the specified 5-c according to the same command.
Monitor h.

Hereinafter, for convenience, the fixed wireless station FR3 that is currently being called will be referred to as "fixed wireless station FR3s'", and the switching destination fixed wireless station FR3 will be referred to as "fixed wireless station FR3d".

(2) Zone switching request The P unit continuously transmits zone switching request signals after transmitting the monitor request signal. The zone switching request signal is transmitted on 5vo-ch and has the signal elements shown in FIG. 5(n).

P, ・5-ch information; 5-ch information that has been empty searched in advance on the mobile phone P side P2Q information; Line quality information currently in use Also, when Q≦21 is satisfied in this state, zone switching processing 2 is executed. enter.

■Fixed wireless station FR3, which is currently monitoring zone switching response, is monitoring destination Sνo-ch.
When a zone switching request signal is received under the following conditions, the device enters the zone switching state from the standby state.

・Zone switching request signal reception conditions (zone switching request signal reception electric field strength)> (Q information specified in the signal) The fixed wireless station FR3 that has entered the zone switching response state checks the 5-ch information included in the signal. Search sequentially, and if an empty 5-ch is detected, use that 5-ch information, or if empty detection fails, search for the 5-ch with empty 5-ch information added on the fixed radio station FR3 side. The zone switching response signal as shown in FIG. 0 is continuously transmitted after the Cc-ch is detected as empty, and the monitored 5vo-ch waits for reception of the FR3 designation signal from the mobile phone P.

■If the designated mobile phone P of fixed wireless station FR3 receives a zone switching response signal on Cc-ch under the following conditions, the 5vo-
Instead of the zone switching request signal that is being continuously transmitted on the channel, an FR3 designation signal to which 5-ch information selected as follows is added is continuously transmitted.

After this, both the fixed radio station FR3 and the mobile phone P device enter switching processing.

・Zone switching response signal reception conditions (zone switching response signal reception field strength information)> (Currently used line quality Q) - Ginigo' - Resident in Selection 16 is as follows.

1) If the 5-ch information included in the zone switching response signal matches the empty 5-ch information that you have already searched, then
-ch information 2) If 1) is not satisfied, empty detection is performed for the 5-ch, and if empty is confirmed, the Sch information 3) If 2L1) is not satisfied, a new one is set on the mobile phone P side. The empty channel was detected and 5-c was confirmed to be empty.
Acquisition of h information switching destination 5-ch is performed as follows.

■Fixed wireless station FR3d has a monitor channel of 5vo-
When an FR3 designation signal such as Φ) in FIG. 5 addressed to the channel is received under the following conditions, the 5-Ch designated by the signal is detected as empty.

- FR3 designated signal reception conditions (FR3 designated signal received electric field strength) ≧ (Q information designated by the signal) If the sky detection result of 5-ch is confirmed to be empty, the same channel as shown in Figure 5 (q) Continuous transmission of channel switching completion signals such as

In addition, when 5-ch is not free, when continuous transmission of channel switching completion signals is completed for the specified time (maximum transmission time of channel switching completion signals), and when it becomes impossible to receive fixed radio station FR3 designated signals. returns to standby state. (The monitor request is not canceled.) ■The mobile phone P position is 5-c specified as the FR3 designated signal.
h, and waits for a self-directed channel switching completion signal from the fixed wireless station FR3d.

When a channel switching completion signal is received under the following conditions, a line link request signal as shown in FIG. 5(r) is continuously transmitted in place of the FR3 designation signal that is being continuously transmitted on the 5vo-ch currently in use.

・Channel switching completion signal reception conditions (Channel switching completion signal reception electric field strength)> (currently used line quality Q) Mobile phone If the channel switching completion signal from the fixed radio station FR3 cannot be received on the designated destination S-ch even after the transmission time (transmission time) has elapsed, the fixed radio station FRS acquisition will fail and a zone switching request will be made again.

■Line link Fixed radio station FR3d, on Sνo-ch during monitoring,
When a line link request signal from the mobile phone P is received under the following conditions, a connection request command is sent to the radio system control device RCE.

・Line link request signal reception condition (Line link request signal received electric field strength) ≧ (Currently used line Q) After that, fixed radio station FR3d switches the switching channel when it receives a connection completion notification command from the radio system controller RCE. Continuous transmission of terminal confirmation signals will begin on 5vo-ch.

Further, if the connection completion notification command is not received from the radio system control device RCE within a specified time after sending the connection request command, the device returns to the standby state. (The monitor request is not canceled.) ■The switched mobile phone P receives the terminal confirmation signal from the fixed wireless station FR3d on the switching destination 5vo-ch, and receives its own electric field information and fixed wireless information included in the signal. The line quality Q determined from the received field strength of station FR3d is (line quality Q of mobile phone P and fixed wireless station FR3d) ≧
(P fixed radio station FR3s line quality Q) If the following is satisfied, the call line is switched from the fixed radio station FR3s to the fixed radio station FR3d.

After switching the call line, the mobile phone is set to 5vo-c.
At h, continuous transmission of terminal confirmation signals is started.

When the fixed radio station FR3d receives a terminal confirmation signal from the mobile phone P, it sends a status setting request command to the radio system control device RCE, and also sends a status setting request command to the radio system control device RCE.
A switching completion notification G is sent to all fixed wireless stations FR3 via the CE.

When the fixed radio station FR3s receives the above notification from the radio system control device RCE, it cancels the radio line and transmits the radio system control device R.
Sends a disconnection request command to the CE and returns to standby state.

Further, when the other fixed radio station FR3 receives the above notification, it releases the monitoring of the mobile phone P location.

An example of zone switching process 1 is shown in FIG.

Finally, the termination of the calling/receiving operation, which remains in the system description of this embodiment, will be explained.

■Cell phone device end call If the "'call hang up" button is operated on the mobile phone P during a call, or if the call is ended as a result of out-of-service processing (see out-of-service processing), call end processing begins.

At this time, no matter what state the mobile phone P is in, it continuously transmits a call termination signal for a specified period of time on 5vo-ch of the call line currently in use, and returns to the transmission completion standby state.

■Fixed radio station FR3 terminates the call Fixed wireless station FR3 terminates the call when it receives a call end signal from the mobile phone P during a call, performs out-of-service processing, and ends the call as a result (see out-of-service processing). Start processing.

A call termination request command is sent to the radio system control device RCE, and all fixed radio stations F are sent via the radio system control device RCE.
Notify R3 of this fact.

Furthermore, all fixed radio stations FR3 cancel all processing related to calls with the mobile phone P.

■Radio system control device RCE call termination The radio system control device RCE receives the call termination request command from the fixed radio station FR3, cancels all processing related to the call with the fixed radio station FR3, and at the same time cancels all processing related to the call with the fixed radio station FR3.
sends a call end signal to. The PBX exchange receives this signal and, if connected from an outside line, transmits a call termination signal to the exchange.

■ System operations related to a fixed wireless station having multiple sets of transceivers The system of the present invention described above is for a case where the fixed wireless station has only one set of transceivers.

In contrast, in service areas with high call traffic,
Even if the above-mentioned fixed wireless stations are installed, calls with mobile phones may not be carried out smoothly, and as a countermeasure, a method is taken in which multiple sets of transmitters and receivers are installed in one set of fixed wireless stations. There is. For fixed wireless stations that can handle high-density traffic areas, the concept of zone-based location registration is introduced into the service zone managed by the fixed wireless station, as described above. The operation of the location registration 1 call registration system will be explained in order below.

The notification signal sent from the plurality of FR3 is sent from the master FR3, and the other transmitters are stopped except for the one communicating with the mobile phone, but all the receivers are waiting for reception. Further, the content of the notification signal includes 5IDZ.

Therefore, location registration 1 location registration cancellation and location registration initialization are all performed using 5 IDZ.

Also, a location registration request from FR3.

Location registration deletion request 1 Location registration initialization request is made for 5 IDZ.

Figure 15(a) shows FR3b among the multiple FR3s that receive location registration requests from mobile phones (self-identification information is 31Db).
) and forwards it to RCE, and R that received it
In CE, S IDZ (
SIDa) is stored and a location registration response signal is transmitted to the FR 3b.

FIG. 15(b) shows the flow of the location registration deletion operation in the same way as FIG. 15(a). In this case, location registration deletion execution instruction (
For the downlink), refer to the zone management table (see Table 2) in the RCE, and in the case of multiple FR3, select two SIDs belonging to the 5 IDZ from which the execution command is to be executed, and download to them.

FIG. 15(C) shows the flow of operations in the case of initializing location registration.

Next, the transmission will be explained.

Control of transmission from the P station is specified on a per zone basis rather than on an individual SID basis. Therefore, in the case of a call, the designation of multiple fixed radio stations and therefore multiple zones is performed in 5IDZ.

In addition, in the case of re-transmission, it is done without specifying the zone.

Regarding incoming calls, when receiving an incoming call execution instruction G from the RCE, if the incoming PID is registered in the zone to which it belongs, the FR3 individual SID is used to control incoming calls.

As is clear from the above explanation, when viewed from a mobile phone, the system operations performed by a fixed wireless station that owns multiple sets of transceivers appear to be exactly the same as those of a fixed wireless station that owns only one set of transceivers. Therefore, it is clear that the present invention works effectively in this case as well.

The above description has been made of the case where the present invention is applied to a large-scale high-rise building, but it is clear that the present invention can be applied to cases where the service area is not only inside the building but also within the premises, urban areas, and residential areas. be.

(5) As described in detail, by applying the system construction according to the present invention to a small zone method using micro cells,
Communication from locations with high outbound call traffic that enables calls to be made and received between mobile phones and other mobile phones or fixed-line phones located anywhere within the service area, and improves communication reliability and quality. can be carried out smoothly, which has an extremely large effect on improving the convenience of communication.

[Brief explanation of the drawing]

Fig. 1 is a system configuration diagram showing one embodiment of the present invention;
FIG. 3 is a block diagram showing an example of a mobile phone used in the present invention, FIG. 3 is a block diagram showing an example of a fixed wireless station used in the present invention, and FIG. 4 is a block diagram showing an example of a wireless system control device used in the present invention. Block diagrams, FIGS. 5(a) to (r) are diagrams showing example formats of signals used in the present invention, FIG. 6 is a diagram showing an example of state transition of a fixed wireless station used in the present invention, and FIG. A flow diagram showing an example of the operation of a location registration request in the invention, FIGS. 8(a) and 8(b) are flow diagrams showing an example of the operation of receiving a call in the invention, and FIG. 9 is a flow diagram showing an example of the operation of making a call in the invention. , FIG. 10 is a flowchart showing an example of the operation of zone switching processing in the present invention, FIG. 11 is a flowchart showing a different expression of FIG. 7, and FIG. 12 is a flowchart showing an example of the operation of a fixed wireless station. FIG. 13 is a flow diagram showing an example of the operation of a mobile phone, FIG. 14 is a block diagram showing an example of the configuration of a plurality fixed wireless station used in the present invention, and FIGS. 15(a), (b), and (C) are pluralization FIG. 3 is a flow diagram showing an example of the operation of the method of the present invention when using a fixed wireless station.

Claims (1)

[Claims] (1) Each fixed wireless station that covers a plurality of zones and constitutes a service area; A plurality of mobile phones that exist within the service area and can communicate with the fixed wireless station; and each of the fixed wireless stations. A wireless station is connected to a general telephone network, identification information of the mobile phone and at least one fixed wireless station that can communicate well with the mobile phone is registered, and the mobile phone is connected to the mobile phone via the registered fixed wireless station. In a mobile communication system including a radio control device for making and receiving calls to a telephone, a plurality of sets of transceivers are installed at one fixed radio station,
If each set of transceivers has identification information, control related to incoming and outgoing calls, and functions as a radio for communication, according to a certain rule, one transceiver is designated as the master, and other multiple transmitters and receivers A mobile communication system characterized in that a pair of transceivers are slaves, and the master transceiver is capable of exchanging information necessary for making and receiving calls with the mobile phone.