KR20060067745A - Automotive network system - Google Patents

Abstract

The present invention relates to a network system for a vehicle, and includes a decoder or encoder for data conversion, a buffer for data storage, a P2P manager for performing group management, a session manager, and a feedback controller to enable ad-hoc wireless communication between vehicles in each vehicle. By providing a streaming server and a client having various communication protocols and control modules, Ad-hoc module, etc., by using the streaming server and the client installed in each vehicle autonomously by a plurality of vehicles without the external communication infrastructure The present invention relates to an Ad-hoc-based vehicle network system that enables direct streaming data transmission and reception between each member vehicle of a group formed by using the same temporary network.

Vehicle, Network System, Ad-hoc, Peer-to-Peer, Server, Client, Streaming

Description

Vehicle network system             

1 is a conceptual diagram illustrating a process of transmitting and receiving information between vehicles performed by a vehicular network system of the present invention;

2 is a block diagram showing an embodiment of a server and a client in a vehicular network system of the present invention;

3 is a view for showing the function and data processing of each configuration made in the server in the vehicular network system of the present invention,

4 is a diagram illustrating a process of configuring a video data transmission header in a vehicular network system of the present invention;

5 is a diagram for explaining a protocol stack in a vehicular network system of the present invention;

6 is a schematic diagram showing a process of transmitting and receiving information in a conventional vehicle;

7 is a schematic diagram showing a flow of data conventionally performed between a client and an external server when a vehicle accesses a network;

8 is a schematic diagram illustrating a general connection relationship in which a vehicle receives data from an external streaming server through an internet network.

<Explanation of symbols for the main parts of the drawings>

10: Server 11: MPEG 4 Encoder

12: memory buffer 13: P2P manager

14: Session Manager 15: Streamer

16: feedback controller 17a: RTP module

17b: UDP / IP module 17c: RTSP module

17d: TCP / IP module 18: Ad-hoc module

20: Client 21: MPEG 4 Decoder

22: memory buffer 23: P2P manager

24: Session Manager 26: Feedback Controller

27a: RTP module 17b: UDP / IP module

27c: RTSP module 27d: TCP / IP module

28: Ad-hoc Module

The present invention relates to a vehicle network system, and more particularly, a decoder or encoder for data conversion, a buffer for data storage, a P2P manager for performing group management, and a session so as to enable Ad-hoc wireless communication between vehicles in each vehicle. By providing a streaming server and a client having a manager, a feedback controller, various communication protocols and control modules, and an ad hoc module, a plurality of vehicles using the streaming server and the client installed in each vehicle without an external communication infrastructure. The present invention relates to an Ad-hoc-based vehicle network system that enables to transmit and receive streaming data directly between each member vehicle of a group formed by using the same, and implement a temporary network autonomously configured by the group.

In the related art, a vertical network with an external Internet network using a base station is used to communicate various information in a vehicle.

That is, as shown in FIG. 6, each vehicle is provided with a device capable of performing a wireless communication function, and a relay function is performed between a device of the vehicle and an external internet network around a road on which the vehicle travels. The base stations are installed so that the vehicle can access the Internet network through the base station while driving.

In addition, a load side network, an information network (central control center), to which base stations are connected, and a server of a service provider are used to transmit and receive information between vehicles.

To this end, the user of the vehicle must register in advance with the service and other content providers to form a group, and the server of the service provider performs transmission data management and group management.

At this time, the base station connects between the vehicle and the vehicle and the external wired network. In order to construct a network from one vehicle to another vehicle, the base station must first access the server of the service provider through the base station, and transmit and receive data. In order to access the base station installed on the side of the road to transmit data to the other vehicle through the network.

Then, the other vehicle receives the data through the base station of the roadside and sends a response message through the base station again.

7 is a schematic diagram showing a flow of data between a client and an external server when a vehicle accesses a network in the related art, and FIG. 8 is a schematic diagram showing a general connection relationship in which a vehicle receives data from an external streaming server through an internet network. .

Conventionally, each mobile node, that is, a vehicle, uses a general wireless LAN card for transmission and reception with the outside, and a roadside device including a base station uses a general wireless interface.

However, the conventional vehicle network system as described above has a disadvantage in that direct transmission and reception of information between vehicles is impossible, and the base station must be connected to transmit and receive information.

That is, when a community and a group of a plurality of vehicles move while driving, a base station must connect to a server and then transmit and receive information. Therefore, a server and a roadside device for transmitting and receiving are necessary. In the absence of a roadside device, transmission and reception between cars is impossible.

In addition, prior agreement is required when creating and registering a group for data transmission and reception.

Accordingly, the present invention has been invented to solve the above problems, and a decoder or encoder for data conversion, a buffer for data storage, and a P2P for group management to enable Ad-hoc wireless communication between vehicles in each vehicle. By providing a streaming server and a client having a manager, a session manager, a feedback controller, various communication protocols and control modules, and an ad hoc module, a plurality of users can use the streaming server and client installed in each vehicle without an external communication infrastructure. The purpose of the present invention is to provide an ad-hoc-based vehicle network system that can implement a temporary network autonomously composed by vehicles of a car and transmit and receive streaming data directly between each member vehicle of a group formed by using the same. have.

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

The present invention provides a vehicle network system,

Decoder for data conversion, memory buffer, P2P manager that performs group management, session manager, streamer, feedback controller, multiple wireless communication protocols and control modules, and Ad-hoc to enable Ad-hoc wireless communication between vehicles A streaming server having a module;

A streaming client having an encoder for data conversion, a memory buffer for data storage, a P2P manager for performing group management, a session manager, a feedback controller, a plurality of wireless communication protocols and control modules, and an Ad-hoc module;

It is configured to include, the streaming server and the client to configure the Ad-hoc mobile wireless network with the surrounding vehicles and at the same time characterized in that it is possible to perform direct streaming data transmission and reception with the vehicles formed in the group .

In particular, the streaming server and the client is characterized in that the wireless communication protocol module has an RTP module, RTSP module, UDP / IP module and TCP / IP module.

Hereinafter, the present invention will be described in more detail with reference to the accompanying drawings.

1 is a conceptual diagram illustrating a process of transmitting and receiving information between vehicles performed by a vehicular network system of the present invention, and FIG. 2 is a diagram illustrating an embodiment of a server and a client in the vehicular network system of the present invention.

In addition, Figure 3 is a view showing the function and data processing process of each configuration in the server in the vehicle network system of the present invention, Figure 4 shows the process of configuring the image data transmission header in the vehicle network system of the present invention 5 is a diagram for describing a protocol stack in a vehicular network system of the present invention.

The present invention relates to a network system for a vehicle, and is provided with a configuration including a streaming server 10 and a client 20 to enable ad-hoc communication between vehicles, so that each vehicle does not use an independent fixed server outside the vehicle. By using the server 10 and the client 20 installed in the ad hoc network can be configured autonomously configured by a plurality of vehicles, it is also used to each member of the group consisting of a plurality of vehicles The present invention relates to a vehicle network system capable of transmitting and receiving streaming data.

The vehicular network system of the present invention includes a decoder 11 for data conversion, a memory buffer 12, a P2P manager 13 for performing group management, a session manager 14, and the like. A streaming server 10 having a streamer 15, a feedback controller 16, a plurality of wireless communication protocol and control modules 17a-17d, 19, and an Ad-hoc module 18; Encoder 21 for data conversion, memory buffer 22 for data storage, P2P manager 23 for group management, session manager 24, feedback controller 26, multiple wireless communication protocols and controls Modules 27a to 27d and 29, and a streaming client 20 having an Ad-hoc module 28.

The vehicular network system of the present invention configured as described above uses the streaming server 10 and the client 20 to form an Ad-hoc mobile wireless network with neighboring vehicles and to directly stream data with the vehicles formed in a group. You can send and receive.

As described above, the vehicular network system of the present invention includes a streaming server 10 and a client 20 capable of implementing a peer-to-peer (P2P) ad-hoc mobile wireless network between moving vehicles in an environment without an external communication infrastructure. All vehicles have the function of a router, and as a server, an automatic and variable network can be configured to configure individual networks for a specific group. Also, various multimedia data such as high-definition video data and high-quality audio data can be freely set within each group. Enable direct transmission and reception between vehicles.

Referring to FIG. 1, assuming that all vehicles are equipped with a vehicle network system of the present invention capable of ad-hoc communication, communication is performed using a vehicle C serving as an intermediate node in order to communicate from the vehicle A to the vehicle E. Is done.

That is, the vehicle A finds a routing path using the Ad-hoc communication protocol and transmits data to the vehicle E. In this process, the vehicle A transmits data to all nodes in the range, that is, the vehicle, through broadcast.

The data transmitted as described above is received by the vehicle B and the vehicle C. Since the vehicle C is determined as an intermediate node to reach the destination vehicle E, the vehicle C receives the data only and the vehicle C transmits the data to the air.

At this time, the vehicle D and the vehicle E receive data, but the vehicle D discards the data, and only the vehicle E receives and processes the data.

In addition, the response from the vehicle E to the vehicle A is also made in the above manner.

Referring to FIG. 2, there is shown an embodiment configuration of a client and a server constituting the network system of the present invention. First, in the case of the client 20, an MPEG 4 decoder 21 and a memory buffer 22 are described. , P2P manager 23, session manager 24, feedback controller 26, RSTP module 27a, TCP / IP module 27b, RTP module 27c, UDP / IP module 27d, Ad-hoc The module 28 and the 802.11 module 29 are configured.

In the case of the server 10, the streamer 15 is included in the client 20 in addition to the MPEG 4 decoder 11 instead of the MPEG 4 decoder due to its functional characteristics.

Among the components, the P2P managers 13 and 23 and the ad-hoc modules 18 and 28 are ad-hoc networks in which each vehicle is autonomously configured by a plurality of vehicles by acting as a server and a client without an external communication infrastructure, That is, it is a core component that forms an Ad-hoc mobile wireless network and enables P2P (Peer to Peer) information transmission and reception between each vehicle forming a group.

The P2P managers 13 and 23 play a role of group formation and management in a moving vehicle, and can be managed efficiently by optimizing Ad-hoc routing and Ad-hoc routing.

In this network system, the process of streaming service through Ad-hoc communication is roughly summarized. In the state where streaming service content is generated, a vehicle to receive the service is connected to a group and a desired service is formed after the group is formed. After receiving the service, the group is terminated by leaving the group or leaving the group by the service vehicle.

In addition, the transmission of the streaming data is controlled through the RTP in the transmission request and the streaming control request from the client 20 on the protocol stack.

More specifically, a group is formed and a session is formed through the P2P manager 13, and when a group is formed, data is stored using the MPEG 4 encoder 11.

Data stored in the buffer 12 is transmitted through the streamer 15 and the control module, the transmitted data is wirelessly based, streaming data is UDP-based, and control data is transmitted TCP-based.

The client 20 receiving the streaming data sends information about the received data to the server 10 through the feedback controller 26, and the server 10 receives the data received from the feedback controller 26 of the client 20. To control streaming data transmission.

Meanwhile, when the data processing process is described in the server 10, in processing the control message, the group generation message is transmitted through the P2P manager 13, and the P2P group message is transmitted using TCP.

In addition, in the flow of video data, video and audio data are encoded by an MPEG 4 encoder, and the encoded data is appended with a group ID to a header, and the streamer 15 is stored after storing the encoded data in the buffer 12. The transmission is made through.

At this time, by using the RTP and STSP to ensure the real-time data, and transmit using the UDP.

In addition, the feedback controller 16 receives the feedback message from the client 20 to adjust the transmission rate of the transmission data, the control message is transmitted with reliability based on RTSP and TCP, and the audio and video data is real-time To ensure the transmission based on UDP and RTP.

In addition, as described above, raw data is encoded into MPEG data through the MPEG 4 encoder 11, and the encoded data is appended with a P2P group ID to the header. In this case, as shown in FIG. Through the module, headers such as RTP, UDP, and IP are added to the header.

And, as shown in Figure 5, in the system of the present invention, the control message and the signaling message (Signaling Data) is transmitted based on TCP and RTCP to ensure reliability, the streaming data (Media Data) for real time Time stamps are stamped and transmitted based on RTP and UDP to avoid retransmission.

In the system of the present invention, the network can be freely configured on the basis of Ad-hoc, and the group can be freely connected and withdrawn based on P2P.

In this way, the present invention relates to a vehicle network system including an Ad-hoc-based broadband streaming server and a client, and accordingly, includes a streaming server and a client to enable ad-hoc communication between vehicles in each vehicle. The temporary network may be configured autonomously by a plurality of vehicles by using the streaming server and the client installed in each vehicle, without using a communication infrastructure outside the vehicle, and thus, a plurality of vehicles may be used. Direct streaming data can be transmitted and received between each member of a group of vehicles.

As described above, according to the vehicle network system according to the present invention, a decoder or encoder for data conversion, a buffer for data storage, and a P2P manager for performing group management to enable Ad-hoc wireless communication between vehicles in each vehicle. And a streaming server and client having a session manager, a feedback controller, various communication protocols and control modules, and an ad-hoc module, thereby enabling a plurality of streaming servers and clients installed in each vehicle without an external communication infrastructure. In addition to implementing a temporary network autonomously configured by the vehicles, it is possible to directly transmit and receive streaming data between each member vehicle of the group formed by using it.

Claims (2)

In a vehicle network system, Decoder for data conversion, memory buffer, P2P manager that performs group management, session manager, streamer, feedback controller, multiple wireless communication protocols and control modules, and Ad-hoc to enable Ad-hoc wireless communication between vehicles A streaming server having a module; A streaming client having an encoder for data conversion, a memory buffer for data storage, a P2P manager for performing group management, a session manager, a feedback controller, a plurality of wireless communication protocols and control modules, and an Ad-hoc module; It is configured to include, the streaming server and the client to configure the Ad-hoc mobile wireless network with the surrounding vehicles, and at the same time can perform the direct streaming data transmission and reception with the group formed vehicles Automotive network system. The method according to claim 1, And said streaming server and client have an RTP module, an RTSP module, a UDP / IP module and a TCP / IP module as a wireless communication protocol module.

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