JP2002280951A - Broadcast system for mobile communication - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a broadcast system or mobile communication that can ensure profits by adopting an idle channel which is not normally used for a service for transmission of information, such as broadcast programs without giving effecting the existing mobile communication system and imposing charges to the broadcast enterpriser. SOLUTION: A mobile broadcast receiver 1 receives broadcast information, which utilizes idle channel of the mobile communication system. A broadcast A cell 2 indicates a reception area of a broadcast A. A broadcast B cell 3 indicates a reception area of a broadcast B. A broadcast C cell 4 indicates a reception area of a broadcast C. A broadcast base station 8 is placed in the broadcast A cell 2 and transmits a common control channel and other than this with information channels, subjected to time division multiplex. A broadcast B base station 9 is placed in the broadcast B cell 3 and transmits a common control channel and other than this with information channels subjected to time division multiplex. A broadcast C base station 10 is placed in the broadcast C cell 4 and transmits a common control channel and a signal, including other information channels subjected to time division multiplex.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mobile communication broadcasting system, and more particularly, to an available mobile communication system irrespective of users who have subscribed / unsubscribed to a communication network without obstructing existing mobile communication system functions. The present invention relates to a mobile communication broadcasting system that provides information using an area and obtains profits of a communication carrier when this system is used.

[0002]

2. Description of the Related Art Generally, a mobile terminal such as a mobile phone has one mobile terminal.
Since telephone communication on a one-to-one basis is mainly performed, of a plurality of wireless channels that can be used by a certain wireless base station, channels that are not used for communication remain idle. However, the band of the wireless channel is a valuable information resource, and it is desired that such portable mobile terminals also utilize the available channel effectively.

As an example of such a technique, Japanese Patent Laid-Open No.
A “wireless telephone communication system” described in Japanese Patent No. 22222 is known.

[0004] This publication describes a technique for transmitting information related to an area to a wireless telephone terminal using one or more available channels of a base station.

[0005]

The conventional mobile communication broadcasting system described above has a drawback that it is difficult to use the system when moving to another wireless area only by using an available channel in a specific wireless area. have.

Further, since an independent identification code is not used as an identifier of information for broadcasting or the like, there is a disadvantage that there is a possibility of interference in information transmission.

[0007] In particular, the base station located in the wireless area,
Since the number of available channels is not grasped by counting the number of available channels and their time zones, there is a drawback that it is not possible to charge a company that desires information.

An object of the present invention is to use a vacant channel which is not normally used not only in a specific radio area but also in other radio areas without affecting an existing mobile communication system, thereby making it possible to perform broadcast or the like. An object of the present invention is to provide a service for transmitting information and a broadcasting system for mobile communication which secures profits by charging a broadcasting company.

[0009]

SUMMARY OF THE INVENTION A mobile communication broadcasting system according to the present invention does not impair the functions of an existing mobile communication system, regardless of whether the user has joined or not joined a communication network. The broadcast transmission base station of the communication network transmits broadcast information to a portable broadcast receiver using an empty area of a common control channel of the mobile communication system.

[0010] A portable broadcast receiver for receiving broadcast information using an empty channel of a mobile communication system, a plurality of broadcast cells indicating a broadcast reception area, and a common broadcast station located in each of the plurality of broadcast cells. A plurality of broadcast transmission base stations for transmitting a time-division multiplexed signal including a control channel and other information channels, wherein the portable broadcast receiver synchronizes the time-division multiplexed signal and secures synchronization Later, without performing location registration work in the reception area to obtain incoming information for itself, search for the common control channel portion of the common control channel format for the time-division multiplexed signal, for broadcasting When the prepared identification code is detected, the broadcast transmission base station inserted into an empty channel of the common control channel format corresponding to this identification code is It is characterized by obtaining the transmission information.

[0011] The common control channel format transmitted by each of the broadcast transmitting base stations has a plurality of time-division multiplexed common control channels, and each common control channel is provided with an identification code prepared for the broadcast. It is characterized by comprising a code, first information data, second information data and a synchronization word for synchronization.

[0012] Continuous broadcast information of a broadcast program transmitted by the broadcast transmission base station is transmitted to the plurality of common control channels.
The information is inserted as the first and second information data of each of the common control channels.

[0013] Broadcast information of different broadcast programs transmitted by the broadcast transmission base station is inserted into the plurality of common control channels as the first and second information data of each of the common control channels. And

[0014] A plurality of identification codes prepared for the broadcast are prepared in correspondence with the plurality of common control channels, and a code for each genre is attached according to a genre of broadcast contents. It is characterized by selecting desired genre-specific information.

[0015] Further, the portable broadcast receiver moves from a broadcast A cell where an arbitrary broadcast A base station of the plurality of broadcast transmission base stations is located to a broadcast B cell where any other broadcast B base station is located. In this case, the broadcast content indicated by the broadcast B base station is received by receiving an identification code prepared for the broadcast preset by the broadcast B base station.

[0016] A portable broadcast receiver for receiving broadcast information using an empty channel of a mobile communication system, a plurality of broadcast cells indicating a broadcast reception area, and a plurality of broadcast cells located in the plurality of broadcast cells, respectively. A plurality of broadcast transmission base stations for transmitting a time-division multiplexed signal including a control channel and other information channels, wherein the portable broadcast receiver includes a multiplexed signal for selecting an effective frequency. A signal frequency search step for performing a frequency search; determining whether the selected frequency searched in the signal frequency search step is valid by performing quality evaluation of an electric field level and a received signal level; The selected frequency determining step returns to the signal frequency searching step if not valid; and the selected frequency determining step determines that the signal frequency is valid. If the synchronization word is detected, an identification code prepared for broadcasting is detected, and whether the identification code is an identification code prepared for broadcasting to be received. Judge,
If the identification code is not the one prepared for the broadcast to be received, the process returns to the selected frequency determination step; if the identification code is the one prepared for the broadcast to be received, the process proceeds to the next step; If the determination step determines that the identification code is prepared for a broadcast to be received, the portable broadcast receiver receives a broadcast and returns to the selected frequency determination. It is characterized by.

[0017]

Next, embodiments of the present invention will be described with reference to the drawings.

FIG. 1 is a system operation diagram showing one embodiment of a mobile communication broadcasting system according to the present invention.

In general, a mobile communication system adopts a method in which an area (hereinafter, referred to as a cell) that can be covered by a base station apparatus is defined, and a plurality of cells are arranged to cover a larger area. Each cell transmits a broadcast channel so that location registration can be performed when the power of the mobile device is turned on.

In the present embodiment shown in FIG. 1, a portable broadcast receiver 1 for receiving broadcast information using an empty channel of a mobile communication system, and a broadcast A indicating a reception area of the broadcast A
Cell 2, a broadcast B cell 3 indicating a reception area of broadcast B,
A broadcast C cell 4 indicating a reception area of the broadcast C and a broadcast A base which is a broadcast transmitting base station located in the broadcast A cell 2 and transmitting a time-division multiplexed signal including a common control channel and other information channels. Station 8 and broadcast B, which is a broadcast transmitting side base station located in broadcast B cell 3 and transmitting a time-division multiplexed signal including a common control channel and other information channels.
A base station 9 and a broadcast C base station 10 which is a broadcast transmitting base station located in the broadcast C cell 4 and transmitting a time-division multiplexed signal including a common control channel and other information channels. .

Next, the operation of the present embodiment will be described in more detail with reference to FIG.

Referring to FIG. 1, there is shown an application to a mobile communication system based on a time division multiplex system. Each of the broadcast A base station 8, the broadcast B base station 9, and the broadcast C base station 10, which are the broadcast transmitting base stations in the present system, has a common control channel 1 as a common control channel format 7.
As shown in 1, 12, 13, and 14, signals including time-division multiplexed information channels are transmitted. Each of the common control channels 11 to 14 includes a broadcast identification code 15, information data 16, information data 18, and a synchronization word 17 for synchronization.

The portable broadcast receiver 1 synchronizes the multiplexed signal in the same processing procedure as a normal mobile station. Usually, after securing synchronization, the mobile station performs location registration work to obtain incoming information for itself, but the portable broadcast receiver 1 for broadcasting in this system does not need to perform this operation, and The search for the common control channel portion of the common control channel format 7 is continued for the signal thus obtained. Here, when the corresponding broadcast identification code 15 is detected,
The content of the common control channel corresponding to the broadcast identification code 15 is received.

Here, since the synchronization word 17 which is information for acquiring synchronization exists in the channel, the portable broadcast receiver 1 in the broadcast A cell 2 uses this synchronization word 17 to synchronize the channel. Then, reference is made to the identification code 15 present at a particular location in the channel. If the identification code 15 is a code prepared for broadcasting, the portable broadcast receiver 1 transmits the information data 1 of the common control channel 12 which is an empty channel of the common control channel format 7.
The broadcast information of the broadcast A base station 8 inserted in 6, 6 is obtained.

As shown in FIG. 1, the common control channels 11, 1
When there are a plurality of 2, 13, and 14, the contents may be continuous broadcast programs or different broadcast programs. The broadcast identification code 15 is assigned to the common control channel 11,
By preparing a plurality of codes corresponding to 12, 13, and 14, and attaching a code for each genre according to the genre of the broadcast content,
The portable broadcast receiver 1 as a receiving side can select desired genre-specific information.

FIG. 1 further shows the state of movement between cells of broadcast A cell 2, broadcast B cell 3, and broadcast C cell 4.

When the portable broadcast receiver 1 moves from the broadcast A cell 2 where the broadcast A base station 8 is located to the broadcast B cell 3 where the broadcast B base station 9 is located, the broadcast indicated by the broadcast B base station 9 The content can be received by the broadcast identification code 15 preset in the broadcast B base station 9. At this time,
By changing the broadcast contents of broadcast A and broadcast B by broadcast A base station 8 and broadcast B base station 9 on the transmitting side,
The portable broadcast receiver 1 can receive a broadcast closely related to an area.

Note that the synchronization acquisition of the portable broadcast receiver 1 is a well-known technique in accordance with the synchronization acquisition method of the mobile communication system, and therefore the description is omitted here.

FIG. 2 is a flowchart showing the operation of the mobile communication broadcasting system.

Referring to FIG. 2, portable broadcast receiver 1
Performs a search for a multiplexed signal frequency in order to select a more effective frequency according to a general mobile communication system method (step 1: S1). Next, in accordance with the general method of the mobile communication system, the quality of the electric field level and the received signal level is evaluated, and it is determined whether the searched selected frequency is valid.
The process proceeds to step 3, and if not valid, returns to step 1 (step 2: S2).

In the next step 3, the synchronization word 17 is detected and synchronization is obtained according to a general method of the mobile communication system (step 3: S3). When the synchronization is obtained, the broadcast identification code 15 is detected, and it is determined whether or not the identification code 15 is the broadcast identification code to be received. If it is not a broadcast identification code to be received, the process returns to step 2, and if it is a broadcast identification code to be received, the process proceeds to the next step (step 4: S4).

If the identification code is for a broadcast to be received, the portable broadcast receiver 1 receives the broadcast and returns to step 2 (step 5: S5).

As described above, Step 1, Step 2,
In step 3, the conventional general mobile communication system technology is used as it is.

Note that the portable broadcast receiver 1 is a broadcast A cell 2
The operation when moving across the broadcast C cell 4 is also in accordance with this.

In step 4, a broadcast identification code 15
Is obtained by using a general mobile communication system technology as it is, but the broadcast identification code 15 to be compared is prepared for this broadcast system. As a result of the comparison in step 4, if the identification code is a desired identification code, the desired broadcast information is received in step 5.

Therefore, the present mobile communication broadcasting system uses an available channel of the common control channel format 7 regardless of users who have subscribed to or not subscribed to the communication network without obstructing existing mobile communication system functions. This method is also effective in providing profitable information to broadcasters and using this method for profits of telecommunications carriers.

As described above, the mobile communication broadcasting system covers a larger area by arranging a plurality of broadcasting cells as areas that can be covered by the broadcasting base station.
Each of the broadcast A to C base stations 8 to 10 located in each of the broadcast A to C cells 2 to 4 always transmits a broadcast channel.

Also, the mobile communication broadcasting system has the following features.
Common control 11 to 14 channels that the portable broadcast receiver 1 refers to intermittently are prepared so that the portable broadcast receiver 1 can receive an incoming call as a wireless channel. Usually, the frequency of use of the common control channels 11 to 14 is not so high, so one channel is assigned to the plurality of portable broadcast receivers 1 waiting in the broadcast cell. Due to the nature of the absence, there is always an empty state in the common control channels 11 to 14.

When the portable broadcast receiver 1 refers to any one of the common control channels 11 to 14, it is necessary to determine whether or not the information of the channel is addressed to itself. The broadcast identification code 15 of the portable broadcast receiver 1 is diverted.

More specifically, the common control channels 11 to 11
The broadcast identification code 15 in the information element constituting the arbitrary common control channel 14 has an identification code 1 of the portable broadcast receiver 1 which is different from the identification code of the general contracted mobile device.
5 will be set in the identification information.

Accordingly, a general mobile station having no receiving function of the mobile communication broadcasting system is recognized that the channel is not a channel addressed to the mobile station itself. Absent. Portable broadcast receiver 1 having a receiving function of the mobile communication broadcasting system
Need only have a function of synchronizing to a radio channel and a function of receiving a channel having the identification code 15 and need not have a transmission function, so that there is no need to classify the portable broadcast receiver 1 as a general mobile device. .

As a method of earning a communication carrier, a broadcaster who wishes to broadcast can obtain information on broadcasts or the like using the common control channels 11 to 14 based on the results of the broadcast time or the broadcast time zone and the number of broadcast channels per unit time. It can be charged as a transmission usage fee.

In this way, in the mobile communication broadcasting system, the user who has not subscribed to the communication network can use the free area of the broadcast channel without interrupting the function of the existing mobile communication system. And at the same time,
Telcos can make money.

[0044]

As described above, since the mobile communication broadcasting system of the present invention uses an independent identification code as a broadcasting identifier, broadcasting can be performed without affecting the existing mobile communication system. It has the effect of.

Since an unused channel is used, the frequency can be effectively used.

Since broadcasting can be performed on a base station unit basis, there is an effect that a community-based broadcasting can be performed.

Since the portable broadcast receiver does not have a transmission function, there is an effect that it is not necessary to belong to the category of the mobile station of the mobile communication system.

Since the base station side can grasp the actual number of broadcast channels by counting the number of available channels and their time zones, it is possible to charge a company that wants to broadcast based on the actual number of broadcast channels. Has an effect.

[Brief description of the drawings]

FIG. 1 is a system operation diagram showing one embodiment of a mobile communication broadcasting system of the present invention.

FIG. 2 is a flowchart showing the operation of the mobile communication broadcasting system.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 portable broadcast receiver 2 broadcast A cell 3 broadcast B cell 4 broadcast C cell 7 common control channel format 8 broadcast A base station 9 broadcast B base station 10 broadcast C base station 11, 12, 13, 14 common control channel 15 identification Code 16 Information data 17 Synchronization word 18 Information data

Claims (8)

[Claims] The present invention provides a mobile communication system that uses a free area of a common control channel provided by an existing mobile communication system, regardless of whether the user has or has not joined the communication network, without impairing the function of the existing mobile communication system. A mobile communication broadcast system, wherein a broadcast transmission base station of the communication network transmits broadcast information to a portable broadcast receiver. 2. A portable broadcast receiver for receiving broadcast information using an empty channel of a mobile communication system, a plurality of broadcast cells indicating a broadcast reception area, and a plurality of broadcast cells located in the plurality of broadcast cells. A plurality of broadcast transmission base stations transmitting a time-division multiplexed signal including a common control channel and other information channels, wherein the portable broadcast receiver synchronizes the time-division multiplexed signal, After synchronization is secured, the common control channel portion of the common control channel format is searched for the time-division multiplexed signal without performing position registration work in the reception area in order to obtain incoming information for itself, and broadcasting is performed. When detecting an identification code prepared for the broadcast transmission base station inserted in an empty channel of the common control channel format corresponding to the identification code Mobile broadcasting system for communication, characterized in that to obtain the broadcast information. 3. The common control channel format transmitted by each of the broadcast transmitting base stations has a plurality of time-division multiplexed common control channels, and each common control channel is prepared for the broadcast. 3. The mobile communication broadcasting system according to claim 2, comprising: an identification code, first information data, second information data, and a synchronization word for synchronization. 4. Inserting, into the plurality of common control channels, continuous broadcast information of a broadcast program transmitted by the broadcast transmission base station as the first and second information data of each of the common control channels. 4. The mobile communication broadcasting system according to claim 3, wherein: 5. Broadcast information of different broadcast programs transmitted by the broadcast transmitting base station is transmitted to the plurality of common control channels,
4. The mobile communication broadcasting system according to claim 3, wherein the information is inserted as the first and second information data included in each of the common control channels. 6. An identification code prepared for the broadcast,
Prepare a plurality of corresponding to the plurality of common control channels,
The mobile communication broadcasting system according to claim 3, wherein a code for each genre is attached according to a genre of the broadcast content, and the portable broadcast receiver selects desired genre-specific information. 7. The portable broadcast receiver moves from a broadcast A cell where an arbitrary broadcast A base station of the plurality of broadcast transmission base stations is located to a broadcast B cell where any other broadcast B base station is located. In this case, the broadcast content indicated by the broadcast B base station is received by receiving an identification code prepared for the broadcast set in the broadcast B base station in advance. 7. The broadcast system for mobile communication according to 3, 4, 5, or 6. 8. A portable broadcast receiver for receiving broadcast information using an empty channel of a mobile communication system, a plurality of broadcast cells indicating a broadcast reception area, and a plurality of broadcast cells located in the plurality of broadcast cells. A plurality of broadcast transmitting base stations for transmitting a time-division multiplexed signal including a common control channel and other information channels, wherein the portable broadcast receiver is multiplexed to select an effective frequency. A signal frequency search step for searching for the selected signal frequency; determining whether the selected frequency searched in the signal frequency search step is valid by performing quality evaluation of the electric field level and the received signal level, and determining whether the selected frequency is valid. The selected frequency determining step returns to the signal frequency searching step if the signal frequency is not valid; In the case, a synchronization acquisition step of detecting a synchronization word and performing synchronization acquisition; detecting the identification code prepared for broadcasting when the synchronization acquisition is performed, and determining whether the identification code is an identification code prepared for broadcasting to be received; If it is not the identification code prepared for the broadcast to be received, return to the selected frequency determination step, if it is the identification code prepared for the broadcast to be received, proceed to the next step A broadcast receiving step of receiving the broadcast and returning to the selected frequency determination, when the identification code determination step determines that the identification code is prepared for a broadcast to be received; A method for broadcasting for mobile communication, comprising: