KR20030059034A - A Location Based Broadcasting Method and its Apparatus for Traffic Information, using the Digital Multimedia Broadcasting System - Google Patents

Abstract

PURPOSE: A method for providing a traffic information service using digital information broadcasting is provided to receive an LBS(Local Based Service) with a low price without using a backward link by using a digital information broadcasting method. CONSTITUTION: An LBS such as traffic information is applied to a receiving terminal by using broad digital information broadcasting having a communication radius more than 1km. A digital information broadcasting station(111) includes a digital audio broadcasting server in order to collect broadcasting information and convert the broadcasting information to digital audio messages. The digital audio broadcasting server inserts the message reception position information into the digital audio messages. The digital audio broadcasting server inserts the repeated broadcasting number, the available period, and the broadcasting period of the digital audio messages into broadcasting control parameters when storing the digital audio messages into a broadcasting pool. The available broadcasting messages are extracted from the broadcasting pool according to the broadcasting control parameters and the extracted broadcasting messages are transmitted.

Description

Branch information broadcasting method using digital information broadcasting {A Location Based Broadcasting Method and its Apparatus for Traffic Information, using the Digital Multimedia Broadcasting System}

An object of the present invention is to provide real-time traffic information in the form of voice related to a location of a terminal in a broadcast receiving terminal using a digital information broadcasting network based on the current wide area service.

TECHNICAL FIELD The present invention relates to a technique for efficiently collecting / processing / evening / providing intelligent traffic information.

(Prior Art) Conventional traffic information providing methods include analog traffic broadcasting, FM-DARC (Digital Audio Radio Communication) using a guard band of FM channels, and traffic information broadcasting using digital multimedia broadcasting. Etc. Since the broadcasting systems have a wide area of at least tens of Km or more, they receive information that is not necessary from the user's point of view and receive only limited information about the current location surrounding the user. In addition, there is a branch broadcasting method (related patent application No. 10-2001-0084669) using DSRC (Dedicated Short-Range Communication) communication, but it assumes a narrow communication radius and a low power base station (broadcasting station) system. Not suitable for broadcasting.

There is a need for a technique for efficiently extracting and providing information related to the current location of a broadcast receiving terminal to an information user using a wide area digital multimedia broadcasting network. In particular, if the broadcast receiving terminal is mounted in a moving vehicle, a driver is required to transmit information by voice for safety. In addition, due to the wide range of digital information broadcasting stations, the amount of broadcast information for individual locations is limited. Therefore, there is a need for a technology that can store and efficiently combine the received branch broadcasting information and reproduce them.

The technical problem to be achieved by the present invention is as follows.

First, it is possible to effectively extract point-of-interest information from a terminal to a service center using wide-area digital information broadcasting, and second, to synthesize and reproduce distributed digital voice data.

1 is a configuration example of a traffic information branch broadcasting network using a digital information broadcasting network, FIG. 2 is a traffic information branch broadcasting message structure using a digital information broadcasting network, FIG. 3 is a message receiving processing procedure of a traffic information branch broadcasting using a digital information broadcasting network, and FIG. Is a structure of a receiving terminal device for a traffic information point broadcasting using a digital information broadcasting network

In order to achieve the above object, a satellite digital broadcasting station or a terrestrial digital broadcasting station (hereinafter referred to as a digital broadcasting station) having a communication coverage of a wide area (several kilometers or more) may include location data related to the information in digital information to be broadcast. Send it out. The location data indicates information receiving area or includes information related to the location where the information is generated.

The broadcast receiving terminals 101 and 102 include a device capable of knowing the current position of the terminal, such as a GPS satellite 121 receiving module, and receives the digital information broadcast and stores the information related to the current position of the terminal. Throw it away. The broadcast information thus stored is reproduced by being combined into voice through an audio decoder.

1 is a diagram illustrating the concept of branch broadcasting through an example of the construction of a traffic information branch broadcasting network using a digital multimedia broadcasting network. The digital broadcasting station 111 transmits various traffic information collected in real time through a traffic information processing server. It is processed into a message in the form of digitized voice and is periodically transmitted through the digital broadcast satellite 112 or the digital terrestrial broadcast transmitter station 113. This broadcast message includes control information such as location information related to this message, message priority, message sequence number, reproduction method, validity period, and the like. The in-vehicle terminal devices 101 and 102 have a built-in location data receiver (eg, a GPS receiver) to determine the current location of the terminal. The processor of the on-vehicle terminal devices 101 and 102 selectively receives and stores only a message related to a current terminal location by using control information of the received traffic information messages, stores the message in a reception pool, and determines whether or not it is reproduced and reproduces by voice. .

2 is an example of a message structure 201, 202, 20m for traffic point broadcasting using a digital information broadcasting network. The structure of a unit message transmitted through a digital broadcasting station includes one or more message slots ( 2011, 2012, and 201n, and each message slot includes a header portion 20111 and a traffic information portion 20112 into which various control information enters. The basic information of the message header includes the message slot number, message length, priority, creation time, valid length, voice recovery method, message valid time, and message-related location information (hereinafter, message location data) to facilitate a specific message combination on the receiving side. Control information such as this is inserted. The message location data of the message header is also a reference for determining whether the receiving terminal receives the message.

3 illustrates a message receiving procedure of a vehicle receiving terminal apparatus in a traffic information branch broadcasting system using a digital information broadcasting network, and includes information such as location information reception success, broadcast packet slot reception success, and voice playback cycle timer while the terminal is waiting. If an event (event) for processing occurs (301), if the event is receiving location information, the terminal location data and the region of interest information managed in the terminal are corrected (303) and goes to the standby state. Extract the message location data from the information header (304) and compare it with the stored terminal location data (305) and if the message location data falls within the terminal region of interest set by the terminal location data or is wide area information, the received broadcast message is read. Modify / send arbitrarily determined broadcast message pool using information processed by information (307) after going into standby mode, otherwise it goes straight to the standby state. In addition, when the reception event is generated from the voice playback period timer set in the terminal, when the broadcast message pool is checked and the invalid message is removed (308), the valid broadcast messages existing in the message pool are reproduced in units of messages, and the playback frequency is set. This is corrected (309). After playing each message once, go to standby mode. Depending on the implementation method, the order of steps 309 and 308 may be reversed.

4 shows a structure of a receiving terminal device for traffic information point broadcasting using a digital information broadcasting network, and a processor module 406 receives a broadcasting signal through a digital broadcasting RF receiving module 401 for receiving and processing digital information broadcasting. Modem and channel decoder 405 and position information acquisition module 402 for processing the audio decoder 411 for reproducing stored digital audio data, audio control user input module 410 for controlling the audio decoder, and terminal position data memory In step 403, the broadcast reception message pool 407 is linked to perform general processing. The processor block 406 is configured to update / store the location data received from the location information acquisition module 402 in the terminal location data memory 403. The message location data of the control information field of the broadcast message slot coming from the digital broadcast radio reception block 401 and the modem and the channel decoder 405 is extracted and is within the area range specified by the terminal location data memory 403 or the message location data. If represents a wide range it is to be stored in the corresponding location of the broadcast reception message pool 407. In addition, the processor module 406 may set a parameter value such as a play interval of the voice play timer 409 and enable the interrupt signal to be received from the voice play timer 409. The unit audio message is read from the received message pool 407 to be reproduced through the audio decoder 411, the audio output device 408, and the speaker 404. The audio control device and the user input device 410 interoperate with the processor module 406 to generate a control signal such as a voice recovery method, recovery data rate, conditional access (CAS) information, etc. to the audio decoder 411. send. The decoded audio signal is transmitted to an audio output device 408 such as a speaker through the audio control and visual display device 412.

Current Location Based Service (LBS) is a location-based service mainly by a terminal (especially a mobile terminal) acquires its location using GPS and sends it to a service center using a public wireless network. I can receive it. However, it is difficult to secure a backward link that can be sent from the terminal to the center. However, the present invention can be used to receive location-based services at low cost (ie, no reverse communication cost) without using a reverse link. In addition, since location-based information such as traffic information has a very small amount of information data, location-based distribution of traffic information is possible by broadcasting the traffic information for each detailed area of a wide area through one channel through the digital information broadcasting and the terminal selectively receiving it. Do.

Claims (3)

In the system that provides location-based services (LBS) such as traffic information to broadcasting receiver terminals using wide-area digital information broadcasting of more than 1 km in radius, the broadcasting information is transmitted from a digital information broadcasting station (hereinafter referred to as a digital broadcasting station). And a digital audio broadcasting server configured to convert the digital audio message into a digital audio message, to maintain the digital audio message, and to transmit the digital audio message to the broadcast receiving terminal (hereinafter referred to as a terminal). Inserting message reception location (or region) information into an audio message; And storing the message in a broadcast control parameter in a unit of message when the message is stored in a broadcast pool (memory space for storing broadcast information for broadcast transmission), including the number of repetitive broadcasts or an effective period or a broadcast period for the message; And three steps of obtaining and transmitting a valid broadcast message from the broadcast pool according to the broadcast control parameter. In a broadcast receiver for receiving digital information broadcasting, the broadcast receiver includes a location information acquisition module 402 capable of obtaining current receiver location information and a broadcast reception message pool 407 capable of temporarily storing the received audio message. And a first step of processing and storing the complete location information from the location information acquisition module 402 into point location data or valid area range data in the terminal location data memory (303); If the broadcast message is received from the modem and the channel decoder 405 without error, the message location data of the message is extracted 304 and compared with the information stored in the terminal location data memory 403 (305, 306). Branch broadcast reception processing method of a digital broadcast receiver comprising two steps of storing 307 in the broadcast reception message pool 407 In addition to the processing method of [Claim 2], the broadcast reception message pool 407 may be checked arbitrarily (or periodically) to remove messages that have passed the expiration date or repetition number of times, and the valid broadcast reception messages may be sequentially played and played back. Broadcast pool management method characterized by displaying the number of times in the message management area