JPH05218943A - Multiple address service communication system in mobile communication system - Google Patents

Abstract

PURPOSE:To attain charging processing of an information reception base for each user utilizing the multiple address communication service and to utilize a radio channel optimizingly by releasing the channel as a general talking channel when no mobile station receiving the multiple address communication service is in existence. CONSTITUTION:A mobile station 1 hooks off and dials a telephone number for a multiple address communication service request. A network side makes the reception of setup of call and designates a channel of the multiple address communication service. The mobile station 1 is automatically switched to a designated multiple address communication service channel and sends additional information to the network. An exchange station 3 of the network starts charging by the reception of information and sends memory rewrite information of the mobile station. Then, an inquiry is made during reception for each prescribed time interval from the charging. The mobile station returns a reply signal during reception. When no reply signal comes even after lapse of a prescribed time, it is discriminated that the reception of information is finished and the charging is stopped.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wireless communication system comprising a plurality of mobile stations such as car phones and mobile phones and a base station, more specifically, effective use of limited wireless channel resources and billing processing for information reception. In consideration of the above, the present invention relates to a broadcast service communication method in a mobile communication system that delivers the same information to many users.

[0002]

2. Description of the Related Art Broadcast services are implemented in a typical cellular communication system of a mobile communication system. This is to provide the same information to a plurality of mobile stations within the service area of a certain base station in the direction of the mobile station from the base station in response to a request from the mobile station. In this broadcast service communication method, when there are service requests from a plurality of mobile stations within one base station, conventionally there has been a method of delivering the following information. In one of them, a separate radio channel is set for each mobile station and the same information is sent. In the other method, only one wave of each base station is always used to perform the broadcast service, and the mobile station that has transmitted has designated the channel and receives the broadcast service.

[0003]

However, in the former method, since the same information is sent to a plurality of wireless channels, a large number of channels are used, and the limited wireless channels are not effectively used. For example, in the broadcast service regarding traffic information, it is possible that a plurality of users concentrated at a congested intersection each make call settings, so that there is a high possibility that channel busy will occur. In the latter method, the wireless channel was wasted when there were no users. Further, there has been a problem that it is not possible to charge according to the information reception time of the user who has transmitted. An object of the present invention is to solve the above-mentioned problems, and a broadcast service communication method in a mobile communication system capable of making the most effective use of a wireless channel and performing charging processing based on information reception for each user who uses the broadcast service. To provide.

[0004]

In order to achieve the above object, a broadcast service communication system in a mobile communication system according to the present invention is a base station and a mobile telephone including a plurality of mobile stations existing in this service area. In the mobile communication system, when there is an information reception request from one of the mobile stations, the base station side sets a broadcast communication channel in the direction from the network to the mobile station, and restricts the transmission from the receiving mobile station, If there is a request to receive the same information from other mobile stations, the same broadcast communication channel is assigned, and while a plurality of mobile stations are receiving information on the broadcast communication channel, the base station side sends a plurality of mobile stations at regular intervals. By sending an inspection signal to the mobile station and obtaining a confirmation response from the receiving mobile station, the reception end time is known for each mobile station.

Further, the present invention is a mobile communication system such as a car telephone which comprises a base station and a plurality of mobile stations existing in this service area, and when one of the mobile stations requests information reception, The station side sets the broadcast channel from the network to the mobile station, restricts the transmission from the receiving mobile station, and if there is a request to receive the same information from other mobile stations, the same broadcast channel is used. A mobile station receiving and allocating and receiving a confirmation signal autonomously at regular intervals is configured to know the reception end time for each mobile station.

When the broadcast service communication system according to the present invention is used in a communication system to which a secret communication system different for each call or each mobile station is applied, a private confidential talk for the broadcast service is used or a secret communication is used. Can be configured not to do.

[0007]

According to the above construction, it is possible to effectively use the wireless channel by using one arbitrary channel when necessary, and it is possible to perform the charging process corresponding to the reception time for each mobile station.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in more detail below with reference to the drawings. FIG. 1 is a schematic diagram showing the configuration of a mobile communication system adopting a broadcast service communication system according to the present invention.
The car telephone exchange 3 accommodates a plurality of base stations 2a, 2b ... And is connected to a terminal device 4 which provides information such as traffic information which is a base of the broadcast service. The exchange 3 is connected to an exchange (not shown) of the general public network.

The base stations 2a, 2b ... Can communicate with mobile stations (car phones, mobile phones) in their respective service areas through wireless channels that are assigned in advance. In the standby state, the mobile stations 1a, 1b, 1c ... Send out a signal in order to register which base station is in the service area. As a result, the network side becomes the base station 2
The mobile stations in the service areas a, 2b ... Can be grasped. The position information of these mobile stations is recorded in a memory device (shown in FIG. 2) provided on the exchange side. In addition to this, the state of the mobile station (busy, etc.) is also recorded in the memory device. When the mobile station moves to another service area beyond the boundary of the current service area, its position information is sent to the network side, and the contents registered in the memory device corresponding to the mobile station are updated.

When a general telephone set accommodated in the public network makes a call to a mobile station, the base station where the mobile station to be called is the control station (see FIG. 2) based on the position information and status information in the memory device. Make a call based on the instructions in (1). The mobile station that matches the telephone number sent from the base station issues a ringing signal and a call is made. When a call from a general telephone becomes possible through such a sequence and the user moves to another service area during a call, the control station is notified of the deterioration of the S / N ratio of the call channel, and the destination You can switch to a new call channel in another service area. On the other hand, when the mobile station makes a call and dials, the base station sends a call signal to the control station. The control station instructs the idle call channel from the base station, and the dial information is sent to the exchange 3 and then to the public network. After receiving the dial signal, the exchange of the public network performs digit translation, selection of outgoing line, transmission of digits, etc., and the call is started in response to the called party.

FIG. 2 is a block diagram showing the configuration of FIG. 1 in detail. Car / mobile phone networks are mobile stations 1a, 1b ...
It is formed by the base stations 2a, 2b ..., The control station 6a, the memory device 7, and the switching center 3. Further, the general public telephone network is formed by the exchange 3, the other exchanges connected to the exchange, the terminal device 4, the general telephone and the like.

FIG. 3 is a control sequence diagram showing an embodiment of the broadcast service communication system according to the present invention. In this embodiment, the present invention is applied to a digital car telephone system, and periodically inquires from a network side to a mobile station about billing. The broadcast service according to the present invention uses one radio channel only during the period when there is a receiving mobile station, and uses this radio channel as a channel for general communication during the other periods.
The mobile station 1 makes a call, reports a predetermined transmission radio condition, and requests call setup. When the telephone number for receiving the broadcast service is dialed, the network side (switching center 3) sends the call setting acceptance information to the calling mobile station, analyzes the sent telephone number, and requests the broadcast service. If it recognizes that it is on, it instructs to switch to the channel for the broadcast service. The control station 6 controls the base station according to the instruction from the exchange 3 and sends out a broadcast service channel switching signal. At the same time, the broadcast mode 1 or 2 is designated.

Here, the broadcast mode 1 is a mode in which the mobile station requests the first broadcast service when no mobile station has received the broadcast service within the service area of the base station. The broadcast mode 2 is a mode designated when one or more mobile stations have already received the broadcast service within the service area of the base station and the mobile station requests the broadcast service. When the broadcast mode 2 is designated, the mobile station 1 is automatically switched to the designated channel by the switching signal from the base station. After that, the additional information (INFO) is sent to the network side, and the exchange 3 which receives this information starts charging. The exchange 3 sends the radio status report information for rewriting the memory of the mobile station. On the other hand, when the exchange 3 receives the telephone number of the broadcast service, it activates the terminal device for traffic information and sends the traffic information. This allows the mobile station 1 to receive the traffic information. The mobile station 1 is restricted from transmitting while receiving information.

The switching center 3 makes a receiving inquiry (audit signal) to the mobile station 1 at regular time intervals after the start of charging. When the mobile station receives the inquiry signal at regular time intervals, it returns a response signal when information is being received. When the exchange 3 receives the response signal within the fixed time, the mobile station 1 determines that the mobile station 1 is receiving and continues the billing. If you cannot receive the response signal after a certain period of time,
The mobile station 1 stops charging as if the communication was disconnected.
When another mobile station in the same service area similarly sets a call for a broadcast service request, the network side designates the same channel as the channel that has already received the broadcast service. This broadcast service will continue to be available even if one station is receiving it. When the reception of the broadcast service is completed and none of the mobile stations has received it, the network side releases the channel used for the broadcast service as a general communication channel.

FIG. 4 is a diagram showing a control sequence when the broadcast mode 1 is designated by the broadcast service request of FIG. Until the broadcast mode 1 is designated, the control sequence is the same as that shown in FIG. When the mobile station 1 is switched to the synchronization mode and receives the synchronization signal SB1 from the network, it sends the synchronization signal SB2 to the network side. The network receives this synchronization signal and returns the synchronization completion signal SB3, and the mobile station 1 receives the synchronization completion signal SB3 and sends out the synchronization completion signal SB4. The network side thereby makes a call (ALART), and subsequently sends a connection signal (CONNECT). The mobile station 1 returns a response signal (CONNECT ACK) indicating that it has received this signal, whereby the network side starts charging. In the subsequent control sequence, the network side sends the radio condition report information, and shifts to the broadcast service information reception in the same procedure as in FIG.

FIG. 5 is a control sequence diagram showing another embodiment of the broadcast service communication system according to the present invention. In this embodiment, the mobile station is periodically made to report whether or not the charge is being received. The procedure from the start of charging to the transmission of the wireless status report information is the same as the procedure of the embodiment shown in FIGS. 3 and 4. The mobile station 1 sends a radio status report 1 (confirmation signal) to the network side at regular time intervals. The network side determines that the report 1 is being received at regular time intervals as long as the report 1 is present and continues charging. Then, if no report is received even after a certain period of time has passed, it is determined that the information reception has ended, and the charging is stopped. It is also conceivable to use the above configuration and the disconnection signal transmission from the mobile station only when the information reception is completed. The broadcast service can use a secret communication method.

[0017]

As described above, according to the present invention,
When receiving a broadcast service, one radio channel is shared by multiple users, so there is no need to prepare a radio channel dedicated to the broadcast service, the radio channel can be effectively used, and a reception time base is set for each mobile station. There is an effect that it becomes possible to charge.

[Brief description of drawings]

FIG. 1 is a schematic diagram showing a configuration of a mobile communication system that employs a broadcast service communication system according to the present invention.

FIG. 2 is a block diagram showing the configuration of FIG. 1 in detail.

FIG. 3 is a control sequence diagram showing an embodiment of a broadcast service communication system according to the present invention, showing a case when a broadcast mode 2 is designated.

4 is a diagram showing a control sequence when a broadcast mode 1 is designated in the embodiment of FIG.

FIG. 5 is a control sequence diagram showing another embodiment of the broadcast service communication system according to the present invention.

[Explanation of symbols]

 1a, 1b, 1c ... Mobile station 2a, 2b ... Base station 3 ... Switching station 4 ... Terminal device (traffic information etc.) 5a, 5b ... Service area 6a ... Control station 7 ... Memory device

Claims (3)

[Claims] 1. In a mobile communication system such as a car telephone, which comprises a base station and a plurality of mobile stations existing in this service area, when one of the mobile stations requests information reception, the base station side A broadcast channel is set from the network to the mobile station, transmission from the receiving mobile station is restricted, and the same broadcast channel is assigned if multiple mobile stations request to receive the same information. While the mobile station is receiving information on the broadcast communication channel, the base station sends out an audit signal to a plurality of mobile stations at regular intervals, and obtains a confirmation response from the receiving mobile station. A broadcast service communication method in a mobile communication system, which is characterized by knowing the reception end time. 2. In a mobile communication system, such as a car telephone, comprising a base station and a plurality of mobile stations existing in this service area, when one of the mobile stations requests to receive information, the base station side The broadcast channel is set from the network to the mobile station, the transmission from the receiving mobile station is restricted, and if there is a request to receive the same information from other mobile stations, the same broadcast channel is assigned and received. A broadcast service communication system in a mobile communication system characterized in that the reception end time of each mobile station is known by autonomously sending confirmation signals from the mobile station inside at regular intervals. 3. A communication system that applies a secret communication method that differs for each call or for each mobile station, wherein a private secret communication for broadcast service is used or no secret communication is performed. Broadcast Service Communication System for Mobile Communication Systems in Japan.