JPH06244780A - Mobile communication control system and mobile station equipment - Google Patents

Abstract

PURPOSE:To reduce the congestion control channel traffic at the time of position registration and the call termination loss of mobile stations by performing position registration zone retrieval and position registration requests performed respectively by the mobile stations together by a repeater. CONSTITUTION:The mobile stations 41-4n provided by subscribers boarding a vehicle 31 which is a mobile medium to which the repeater 2 is mounted receive a control channel for relay transmitted by the repeater 2 and perform the position registration request, connection control and communication by the control channel for the relay. The repeater 2 gathers the subscriber's numbers of the mobile stations 41-4n by position registration request signals from the mobile stations 41-4n and informs through base stations 4a-4c of a home memory station 5. Also, also the connection control and calls are relayed to the base stations 4a-4c. Thus, the congestion of the control channel traffic at the time of the position registration and the call termination loss of the mobile stations 41-4n can be reduced and the communication can be stably performed even from inside the shielded mobile medium.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is used in a mobile radio communication system in which a base station and a large number of mobile stations communicate with each other via radio lines. The present invention is a system developed for use in mobile radio communication in which a large number of users move together with mobile stations and a communication carrier forms part of a public communication network that provides communication and connection services for users. However, the method of the present invention can be applied to communication other than the public communication network. In particular,
The present invention relates to reduction of traffic and effective use of communication lines in zone switching of mobile communication systems.

[0002]

2. Description of the Related Art A conventional example will be described with reference to FIG. Figure 6
FIG. 3 is a diagram showing a service area configuration of a mobile communication system and signals used for the service area configuration. In the mobile communication system, the service area 1 has a plurality of location registration zones 2 as shown in FIG.
The location registration zone 2a is divided into a plurality of radio zones 3a, 3b, 3c, and the radio zones 3a, 3b, 3c are respectively divided into radio base stations 4a, 4b, 4c. It is provided. When an incoming call arrives at the mobile station 4, it is difficult to identify the incoming exchange center where the mobile station 4 exists based only on the subscriber number dialed by the calling subscriber. Therefore, one or more wireless zones 3
a, 3b, 3c are designated as location registration zones 2a, 2b, 2c, and each time the mobile station 4 moves between the location registration zones 2a, 2b, 2c, the location registration zone 2a, 2b at the mobile station 4 side , 2c, and notifies the home memory station 5 of this. The home memory station 5 stores this information in the database 32, manages in which location registration zone 2a, 2b, 2c the mobile station 4 is based on this information, and when the mobile station 4 receives an incoming call, the mobile station 4 It is possible to prevent invalid incoming call processing from being performed in the location registration zones 2a, 2b, and 2c where there is no.

On the other hand, the location registration of the mobile station 4 has been conventionally performed as follows. When the mobile station 4 is moving in the wireless zone 3a, location registration is performed at regular time intervals, and when the reception level of the signal from the base station 4a is below a predetermined value, each base station 4a, 4b, 4c, the unique frequency fsa transmitted to the wireless zones 3a, 3b, 3c
The control channels of 1, fsa2, and fsa3 are sequentially received, and it is determined that the mobile station 4 exists in the radio zones 3a, 3b, and 3c corresponding to the control channel having the maximum reception level. Each base station 4a, 4b, 4c is a mobile station 4
The location registration request is notified to the home memory station 5 together with the subscriber number through the control channel to perform location registration.

A common control channel is assigned to each location registration zone 2a, 2b, 2c, and the base stations 4a, 4b, 4c of the wireless zones 3a, 3b, 3c are assigned to the location registration zone 2a. Sending control channel. The control channel is usually composed of a part for transmitting common information within the location registration zone 2a and a part for transmitting information specific to each wireless zone. These are wireless zones 3a, 3 in the location registration zone 2a.
same frequency fs from the base stations 4a, 4b, 4c of b, 3c
frequency fsa1, fsa different from the case of being transmitted at a
2 and fsa3 may be transmitted. In the former case, measures are generally taken so as not to interfere by matching the phases of the radio frequency and the modulated signal, and in the latter case, it may be necessary to simply transmit common information within the location registration zone 2a. It suffices to separately transmit a portion for transmitting information unique to each wireless zone 3a, 3b, 3c, and it is not necessary to synchronize among the plurality of base stations 4a, 4b, 4c.

FIG. 6B shows the signal structure of the control channel when the signals are transmitted at the frequencies fsa1, fsa2, and fsa3 which are different for each of the wireless zones 3a, 3b, and 3c. The control channel transmits a part 7 that transmits common information within the location registration zone 2a, a part 8 that transmits unique information for each wireless zone 3a, 3b, 3c, and a communication for each wireless zone 3a, 3b, 3c. The parts 9 to be formed are time-divisionally multiplexed.

The mobile station 4 is used by a train or the like in the wireless zones 3a, 3
When moving between b and 3c, the mobile station 4 moves to the wireless zone 3
Frequency is changed to fsa1, f
While switching to sa2 and fsa3, wireless zones 3a and 3b,
Searching for 3c.

[0007]

As described above, the mobile station searches the location registration zone at regular intervals. Therefore, even if the mobile station does not move in the wireless zone near the center of the location registration zone but in the wireless zone near the center and may move to the adjacent location registration zone immediately, the location registration zone search is performed at regular intervals. To do. Further, depending on the radio wave propagation situation, the location registration zone search will be performed if the reception level of the control channel becomes equal to or lower than a predetermined value even when moving in a radio zone other than the border zone of the location registration zone. While the location registration zone is being searched, incoming calls to that mobile station are disabled. In particular, when the owner of the mobile station is moving in a car, train, airplane, etc., it is not preferable as a communication method because there are many opportunities for making an incoming call because the location registration zone is being searched.

Also, considering control channel traffic for location registration, a large number of location registration requests are made every time many people cross a location registration zone boundary when traveling by the same train, bus, etc. with a mobile station. Since the signal is transmitted and received via the control channel, there is a high possibility that the connection control of another mobile station that is performing connection control such as transmission using the control channel will not be performed normally.

The present invention has been made against such a background, and collectively performs location registration zone search and location information notification performed individually by the mobile station, and controls the mobile station for incoming call loss and location registration. An object of the present invention is to provide a mobile communication system capable of reducing congestion of channel traffic and stably performing communication even from inside a shielded mobile medium (train, bus, etc.).

[0010]

The first aspect of the present invention is to:
It comprises a plurality of base stations, a large number of mobile stations connectable to the base stations via radio lines, and a control station for controlling the plurality of base stations. Storage means for registering one or a plurality of base stations that should be called all at once, means for updating the registered contents of this storage means as the mobile station moves, and means for calling from the base station to the mobile station. And a means for controlling the base station registered in the storage means to execute the mobile radio communication method.

Here, a feature of the present invention is that a means for relay connection between the mobile station and the control station via the base station is mounted on a mobile medium, and the mobile station performs the relay connection. Means for connecting to the means, the means for relay connection, means for registering the mobile station connected by the means for connecting, a subscriber number of each of the registered mobile stations and this relay connection It is provided with means for notifying the control station of the position information of the means for performing the control via the base station, and means for relaying the connection control of the registered mobile station and the call.

[0012] It is preferable that the means for connecting comprises means for connecting by a relay control channel different from the control channel of the base station.

A second aspect of the present invention is a mobile station apparatus used in the above method, which is characterized in that the means for transmitting / receiving on the control channel of the base station is connected to the mobile medium for relay connection. And means for transmitting and receiving on the control channel used by the means.

This mobile station device is sold in the market irrespective of the carrier operating the above method.

[0015]

The relay device is mounted on a moving medium such as a train or a bus. When the mobile station carried by the subscriber who has boarded the mobile medium equipped with this relay device receives the relay control channel sent from the relay device, the mobile station carries out a position registration request, connection control, and communication by means of the relay control channel.

The relay device collects the subscriber numbers of the mobile stations owned by the subscribers on the mobile medium in response to the position registration request signal from the mobile station, and notifies the control station via the base station. The connection control and communication are also relayed to the base station by this relay device.

As a result, a large number of individual traffics generated by mobile stations possessed by a large number of subscribers on the same mobile medium passing through the boundary of the location registration zone are combined into one by the relay device. Will be reduced. Furthermore, when the mobile station is under the control of the relay device, it is not necessary to search the location registration zone, and the incoming call loss can be reduced. Further, stable communication can be performed even in a shielded space such as a train or a bus.

A subscriber having a mobile station that uses this relay device does not necessarily have to be a passenger such as a train or a bus, which is the moving medium, but a subscriber who is moving in a parked or stopped bus or a neighborhood of the train. Can be a person.

[0019]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The configuration of an embodiment of the present invention will be described with reference to FIG. FIG. 1 is a block diagram of an embodiment of the present invention.

The present invention is based on three base stations 4a, 4b, 4c.
When, the base station 4a, 4b, a number of the mobile station 4 ₁ to 4 _n connectable via a radio channel to 4c, three base stations 4
a, 4b, and a home memory station 5 as a control station for controlling 4c, The home memory station 5, the mobile station 4 ₁
4 _n the mobile station every 4 ₁ to 4 _n three base stations 4a should call concurrently, 4b, a database 32 as storage means for registering the 4c, the mobile station 4 ₁ registered contents of the database 32 means to 4 _n is accompanied updates to the mobile, the base station 4a, 4b, the mobile station 4 ₁ registered the call to the database 32 for to 4 _n base stations 4a from 4c, 4b, to run from 4c It is a mobile radio communication system provided with a control means.

[0021] Here, it is an aspect of the present invention, the mobile station 4 ₁ to the vehicle 31 is a transfer medium such as a train or bus
4 _n and the home memory station 5 are mounted as relay means 2 as means for relay-connecting via the base stations 4a, 4b, 4c,
The mobile stations 4 ₁ to 4 _n include means for connecting to the relay device 2, and the relay device 2 moves with the vehicle 31 and is connected to the mobile station 4 by the means for connecting.
A means for registering ₁ to 4 _n and the registered mobile station 4 ₁
To 4 _n each subscriber number and the relay device 2 of the position information the base station 4a, 4b, and means for notifying the home memory station 5 via 4c, the mobile station ₄₁ to which the registered
_n connection control and means for relaying calls.

The means for connecting is a base station 4a,
4b and 4c control channel frequencies fsa1 and fsa
2, the frequency F of the relay control channel different from fsa3
This is a configuration including means for connecting by sa1.

The mobile station devices used by the mobile stations 4 ₁ to 4 _n include a means for transmitting / receiving on the control channel frequencies fsa1, fsa2, fsa3 of the base stations 4a, 4b, 4c, and a relay device used by the relay device 2. Frequency Fsa of control channel
1 and a means for transmitting and receiving.

In the embodiment of the present invention, the communication is performed by using the same frequencies fsa1, fsa2, fsa3, Fsa1 as the control channel frequencies fsa1, fsa2, fsa3, Fsa1.

Next, the operation of the embodiment of the present invention will be described with reference to FIG. Figure 2 is the relay device 2 and the mobile station 4 ₁ to 4 _n
FIG. 3 is a block configuration diagram of a mobile station device used for. The relay device 2 is configured as shown in FIG. The base station unit 11 receives the base stations 4 a, 4 b, 4 and 4 via the antenna 10.
Send and receive signals to and from c. The mobile station unit 12 has an antenna 14
Sending and receiving mobile station 4 ₁ to 4 _n and the signal via. These are controlled by the control unit 13.

The mobile station devices of the mobile stations 4 ₁ to 4 _n are shown in FIG.
It is configured as shown in (b). The base station unit 16 transmits / receives signals to / from the base stations 4a, 4b, 4c via the antenna 15. The relay device section 17 transmits and receives signals to and from the relay device 2 via the antenna 19.

The mobile station 4 ₁ to 4 _n and the base station 4a, 4b, 4
The transmission and reception of signals to and from c are performed at frequencies fsa1 and fsa, respectively.
2, carried out in Fsa3, also the mobile station ₄₁ to the relay device 2
Signals are transmitted and received to and from _n at frequency Fsa1. Here, although the antennas 10 and 14 or the antennas 15 and 19 are described individually for the sake of clarity, they may be configured by a single antenna element.

Next, a description will be given by referring to the operation of the mobile station 4 ₁ to 4 _n to FIG. Figure 3 is a flowchart showing the operation of the mobile station 4 ₁ to 4 _n. Mobile station 4 ₁ to 4 _n is preliminarily frequency fsa1, fsa2, fsa3 and frequency F
It is set so that sa1 can be transmitted and received. Mobile station 4
₁ to 4 _n periodically scan the control channels of frequencies fsa1, fsa2, fsa3, and Fsa1 when the power is turned on or in standby (S1), and if radio waves of frequency Fsa1 that is a relay control channel can be received (S2), A position registration request is made to the relay device 2 using this frequency Fsa1 (S3). When the position registration confirmation signal is received from the relay device 2 (S4), the standby operation is performed at the frequency Fsa1 to make and receive the call (S5). If the radio wave of the frequency Fsa1 cannot be received (S2), the location registration request is made by any one of the frequencies fsa1, fsa2, and fsa3 as in the conventional case (S6). When the location registration confirmation signal is received from the base stations 4a, 4b, 4c in response to the location registration request (S7), the incoming and outgoing call is made at the frequencies fsa1, fsa2, fsa3 at which the location registration confirmation signal is received (S7).
8). Further, when the location registration request is made because the frequency Fsa1 is received but the location registration confirmation signal from the relay device 2 cannot be received (S4), the frequency fsa is maintained as usual.
The location registration request and the incoming / outgoing call are performed by any one of 1, fsa2, and fsa3 (S6 to S8).

Next, the operation of the relay device 2 will be described with reference to FIG. FIG. 4 is a flowchart showing the operation of the relay device 2. Relay apparatus 2 performs polling to prompt a location registration request to the mobile station 4 ₁ to 4 _n control channel frequency Fsa1 (S21). This frequency Fsa1 mobile station 4 ₁ to 4 _n using come to a location registration request when the (S
22), to check the subscriber number of the mobile station 4 ₁ ~4 _n (S23). Relay apparatus 2 sends back a location registration confirmation signal to the mobile station 4 ₁ to 4 _n and notifies the subscriber number in the database 32 of the home memory station 5 (S24). afterwards,
If incoming and outgoing to mobile station 4 ₁ to 4 _n is generated, the base station 4a the mobile station 4 ₁ to 4 _n which receive calls occurs, 4b, 4c
And the mobile station 4 ₁ to 4 _n and relay connection (S26), when the communication ends (S27), and repeats the above operation again.

Assuming that the relay device 2 is installed in a train and is moving in the wireless zone 3a, as an example, polling that prompts transmission of a position registration request at each timing when the train arrives at a station and opens and closes a door. It was carried out in the mobile station 4 ₁ to 4 _n the control channel frequency FSA1, and notifies the information in the frequency fsa1 the base station 4a and coordinating a plurality of information. The location registration confirmation signal by the frequency Fsa1 to a plurality of mobile stations 4 ₁ to 4 _n When position receives the registration confirmation signal from the base station 4a reply.

The relay device 2 is the mobile station 4 ₁
Each time ~ 4 _n is added, this operation is repeated, and migration search of the location registration zones 2a, 2b, 2c is always performed,
When the transfer is confirmed, the location registration of the relay device 2 is changed to the home memory station 5 via the base stations 4a, 4b, 4c. During this time, the mobile station 4 ₁ to 4 _n is not necessary to perform the location registration zone search individually. Home In the memory station 5 present in the previous notification, database mobile station 4 ₁ to 4 _n not present in this notice as far down from the train 32
Remove from.

FIG. 5 shows the database 3 of the home memory station 5.
2 is shown. FIG. 5 is a diagram showing the database 32. The database 32 is composed of the number of the relay device 2, the position information, and the subscriber number of the acting mobile station.

[0033]

As described above, according to the present invention, the relay device collects the location registration zone search and the location registration request individually performed by the mobile station, and when the incoming call loss of the mobile station and the location registration request occur. Control channel traffic congestion can be reduced and shielded mobile media (train,
It is possible to perform stable communication from inside the bus).

[Brief description of drawings]

FIG. 1 is a configuration diagram of an embodiment of the present invention.

FIG. 2 is a block configuration diagram of a relay device and a mobile station device.

FIG. 3 is a flowchart showing the operation of the mobile station.

FIG. 4 is a flowchart showing the operation of the relay device.

FIG. 5 is a diagram showing a database.

FIG. 6 is a diagram illustrating a conventional example.

[Explanation of symbols]

Portion for transmitting first service area 2 relay device 2a, 2b, 2c location registration zone 3,10,14,15 antenna 3a, 3b, 3c radio zones 4, 4 ₁ to 4 _n mobile station 5 the home memory station 71 information common 8 Part for transmitting unique information 9 Part for transmitting communication 11 to base station section 12 to mobile station section 13 and 18 Control section 16 to base station section 17 to repeater section 32 Database

Claims (3)

[Claims] 1. A plurality of base stations, a plurality of mobile stations connectable to the base stations via a wireless line, and a control station for controlling the plurality of base stations. Storage means for registering one or a plurality of base stations that should call the mobile station all at once for each station,
Mobile having means for updating the registered contents of the storage means as the mobile station moves, and means for controlling a call from the base station to the mobile station to be executed from the base station registered in the storage means In the wireless communication system, a means for relay-connecting the mobile station and the control station to the mobile medium via the base station is mounted, and the mobile station comprises means for connecting to the relay-connecting means. The relay connection means registers the mobile stations connected by the connection means, the subscriber numbers of the registered mobile stations, and the position information of the relay connection means to the base station. A mobile communication control system comprising: means for notifying the control station via the mobile station; and means for controlling connection of the registered mobile station and relaying a call. 2. The mobile communication control system according to claim 1, wherein the means for connecting comprises means for connecting by a relay control channel different from the control channel of the base station. 3. A mobile station apparatus comprising both means for transmitting / receiving on a control channel of a base station and means for transmitting / receiving on a control channel used by means for relay connection provided in the mobile medium.