JPH01170133A - System for linear mobile body communication - Google Patents

Abstract

PURPOSE:To dispense with special channel and interface for a position management by adopting a system for registering a mobile station position composed of a call accepting radio zone and a mobile station identifying number by means of an earth station to detect a dummy call. CONSTITUTION:When a call in the middle of a connection exists in a mobile body 1, the call is registered from the mobile station identifying number and a call accepting radio zone 32 in the call connecting signal sequence to a mobile station position registering table 51 by a earth station 5. When the call in the middle of the connection does not exist, at the mobile station 1, the dummy call is generated by using an automatic calling device 2 for periods smaller than the shortest passing times of radio zones 31-35 counted by a timer started since the call is disconnected. The dummy call is the call equal to an ordinary mobile station calling sequence and without a call. By the earth station 5, the mobile station identifying number and call accepting radio zone 32 are detected by using the dummy call, and they are registered.

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention provides a mobile communication system in which the location of a mobile station is detected and registered at a ground station, and a call is made to a mobile station layer using the location information. In particular, when the mobile station moves linearly,
The present invention relates to mobile station position detection and registration suitable for a mobile communication system in which the traveling direction is constant.

[Conventional technology]

Regarding car phones, research and practical application report Vol. 26 No. 7 (1977) r Car phone radio line control” (P187
1 to P1aaa), the location registration of the mobile station is as follows:
A different position notification signal for each zone is constantly sent to the ground station on a dedicated channel, and the mobile station detects position changes based on level fluctuations and reports them to the ground station. , automobile''!11: This method is suitable as a communication system, and has no versatility with respect to other systems.

[Problem that the invention seeks to solve]

The above-mentioned conventional technology does not take into consideration its application to a system with few wireless channels and almost no out-of-band signals, and if a similar method is adopted,
Problems arise, such as the influence on traffic due to exclusive use of one channel, and communication interference due to the necessity of using a signal within the voice band as a signal. The purpose of the present invention is to
Mobile station position detection without exclusive use of a wireless channel for control, using a normal communication interface without a special interface for position detection, and taking advantage of the characteristics of a mobile object moving linearly. The purpose is to realize a detection and registration method.

[Means for solving problems]

The above purpose is to send a mobile wJR-specific number from the mobile station during the normal sequence of mobile station call origination and call arrival to the mobile station, and to create a state in which there is no call origination from the mobile station or call arrival to the mobile station. A function that automatically sends out pseudo calls at fixed intervals from mobile stations.
This is achieved by establishing a method in which a ground station that detects a pseudo call registers a mobile station location 1lt consisting of its call reception radio zone and mobile station identification number.

[Effect]

If a mobile station has a call in progress, the ground station can obtain the location information of the away mobile station from the signal sequence, and if there is no call in progress, a timer starts from the call disconnection. By transmitting pseudo calls at regular intervals until a normal call occurs, it becomes possible for the ground station to obtain the location information of the missed mobile station.

When an incoming call to a mobile station occurs as a result, the ground station refers to the latest location information of the mobile station that has left the mobile station and places the call in the registered wireless zone, resulting in unnecessary line hold due to the call. This enables efficient mobile station calling without any hassle. Here, in the case of a linear mobile object, since the transit time of each radio zone is almost constant, the pseudo call sending cycle should be set smaller than the shortest radio zone transit time, and between pseudo calls, the radio zone t-2 zone There will be no more passing through;
The accuracy of location information is improved. In addition, the latest registered location information is, in the worst case, information from before the pseudo call period, so it is possible that the mobile station has moved to the next wireless zone, but when calling the mobile station, the mobile station may move forward. This is resolved by calling the next wireless zone at the same time.

〔Example〕

Hereinafter, a -*m example of the present invention will be explained with reference to FIGS. 1 to 5. FIG. 1 shows the configuration of a linear mobile communication system and a mobile station location registration method. The linear mobile communication system includes a mobile station 1, an orbit 3, radio zones 31 to 35 on the orbit,
The relay line 4, the ground station 5 to the ground station, and the ground subscriber 7 are connected via the public network 6. Allows call connection. For mobile station location registration, if there is a call being connected at the mobile station, the mobile station identification number in the call connection signal sequence and the mobile station location registration table 51 at the ground station from the call acceptance radio zone. However, if there is no connected call, the mobile station 1 calls the automatic calling device lc2 at intervals smaller than the shortest transit time between wireless zones 51 to 35, which is counted by a timer started from the time the call is disconnected. to generate a pseudo call. For example, if there is no call connected to the mobile station 1 shown in FIG. 1, a pseudo call is periodically generated from the automatic call originating bag f112. A pseudo call is the same as a normal mobile station call sequence and is positioned as a call without a call. The terrestrial wJ 4 that has received the call from the mobile station a 1 through the radio sea 732 detects the mobile station identification number abc unique to the mobile station during the connection sequence, and stores the current information of the mobile station αbc in the mobile station location registration table 51. 1m32. FIG. 2 shows an example of a normal call signal sequence addressed to a mobile station. The ground station that receives the activation signal 201 from the mobile station transmits an activation confirmation signal 202 and accepts the request. At this time, it is identified through which wireless zone the trunk line was activated.

Next, the ground station receives mobile station identification numbers 203 and 205 from the mobile station.
206 and send out confirmation signals 204 and 207, respectively. At this point, the wireless zone position where the missed mobile station exists is determined and registered in the mobile station position registration table. After that, the mobile station uses the call connection information 2, such as the telephone number of the other party.
08, a sequence end signal 209 indicating the end of the sequence, and a sequence end confirmation signal 21 from the ground station.
The connection sequence ends at 0. Thereafter, a ringback tone 211 is sent from the ground station side, and after a response and confirmation of the response, the ringback tone 211 enters the communication tone 212. To end the call, disconnect signal 2
13 disconnection confirmation signal 214 sequence. In the case of a pseudo call, the sequence is the same up to the sequence end confirmation signal 210, and then a fixed sequence immediately moves to the call end sequence. Therefore, by assigning a special telephone number for pseudo call identification, the awareness of the ground station and mobile station is aligned.

FIG. 3 shows a mobile station paging method. Call 31 connected from the ground using the calling mobile station's identification number xyz
In the ground station 5 that received 0, the mobile station location registration table 51
Search for the mobile station identification number Xv2 above. By making a mobile station call to two zones, the friend radio zone 3n and the unrelated zone 5n+1, which is the first zone in front of the mobile station αbc in the direction of movement, the mobile station identification number Xνχ
It becomes possible to establish a connection with the mobile station 1 having the following.

〔Effect of the invention〕

According to the present invention, it is possible to detect and embed the location of a mobile station in linear mobile communication system equipment. There is no need to configure settings or to employ special interfaces, which has the effect of reducing system equipment and simplifying the I/D/software configuration.

[Brief explanation of the drawing]

FIG. 1 is an explanatory diagram of the configuration of a linear mobile communication system and a mobile station location registration method according to an embodiment of the present invention, FIG. 2 is a normal mobile station calling signal sequence, and FIG. It is an explanatory diagram showing the method. DESCRIPTION OF SYMBOLS 1... Mobile station, 2... Automatic calling device, 3... Orbit, 4... Relay line, 5... Ground station, 6... Public network, 7... Terrestrial subscriber , 51-35... Unrelated zone,
51...Mobile station location registration table.

Claims (1)

[Claims] 1. A mobile station that has an exchange and multiple terminals and that moves linearly, a transmission line that includes a radio section, and a ground station that performs relaying between the mobile station and the public telephone network and tracking control as the mobile station moves. In a linear mobile communication system consisting of a mobile station, a ground station detects the location of a mobile station by periodically making a pseudo call from the mobile station using the same sequence as the normal mobile station calling sequence when there is no call. , registration, and when a call is issued from the ground to a mobile station, it is possible to efficiently call the mobile station.