KR20110062652A - Car communication system over multi-access channel - Google Patents

Abstract

PURPOSE: A wireless multiple access communication system for a vehicle is provided to transceive distinguished information to each protocol by distinguishing data information of other devices with information mobile phone under multiple connection environment. CONSTITUTION: Vehicle information from electronic devices in a vehicle connected through a CAN(Controller Area Network) communication network is stored in a memory(110). A controller(140) sends a communication connection signal to a Bluetooth communication module(130) for multi connection. The Bluetooth communication module attempts a connection to an external Bluetooth communication devices(150,160) nearby the vehicle.

Description

Car wireless communication system {CAR COMMUNICATION SYSTEM OVER MULTI-ACCESS CHANNEL}

The present invention relates to a wireless communication system for a vehicle, and more particularly, to an apparatus and a method for transmitting and receiving digital data by connecting to a plurality of devices through a multiple access channel to a digital wireless communication network.

Nowadays, due to the development of electronic devices, in order to improve the performance of automobiles, many rely on the control of electronic devices. In particular, a variety of sensors are used to improve the performance of the engine to generate the optimum engine efficiency, increasing the reliability of the vehicle. In addition, the development of such electronic devices is applied to not only actual engine driving but also safety devices for driving driver safety, various additional devices for driving convenience, and driving devices.

In particular, an audio system is installed for the driver's convenience and comfortable driving conditions, and a radio for listening to various information and music transmitted from a broadcasting station, and a cassette tape recorder or CD player for listening to a cassette tape or CD, In addition, LD players are installed to allow users to watch videos, TVs, and laser disks to enjoy video. In addition, convenience devices related to personal cell phones, cellular phones, or cellular phones (hereinafter, referred to as 'mobile phones') have spread to allow drivers to talk freely even when driving.

Along with the rapid development of information and communication technology, various mobile communication technologies have been developed and applied for the purpose of in-vehicle use, and are typically Bluetooth, Zigbee, Ultra Wide Band (UWB), WLAN (Wi-Fi: Wireless LAN, Wireless LAN) are being developed. In particular, high-end in-vehicle Bluetooth hand-free technology has recently been widely applied to vehicles. In addition, the development of a unit for transmitting and receiving data using an in-vehicle Bluetooth diagnostic system has recently been applied and applied.

As such, in recent years, a vehicle is provided with various services using wireless communication technology in addition to simply serving as a means of transportation. In particular, a technology for diagnosing a vehicle or transmitting and receiving various data other than voice communication has been developed by applying Bluetooth technology. Specifically, when looking at a communication system mounted on a conventional vehicle, using a Bluetooth terminal or a CDMA modem mounted on the vehicle or in conjunction with a user's or driver's mobile phone, remote diagnosis management, emergency dispatch service, real-time map information update, vehicle information Services such as provision and accident notification are provided. However, the current Bluetooth communication system forms only one physical propagation channel, so that a processing apparatus capable of simultaneously processing a plurality of protocols is not mounted in a vehicle. The existing single access protocol cannot be connected to multiple devices at the same time. As a result, it is difficult for the driver or the user to be provided with each service collectively or simultaneously.

An object of the present invention is to transmit and receive digital data through a plurality of protocols in a vehicular wireless communication system, and in particular, to distinguish a variety of devices connected to the vehicular wireless communication system by connecting a plurality of radio channels and to apply different protocols. Thus, the driver and the user can be provided with a variety of services even in the driving state.

In order to achieve the above object, a vehicle Bluetooth system according to an embodiment of the present invention includes a wireless transceiver for receiving identifiers from a plurality of communication devices; And a single communication control device for establishing a plurality of wireless channels corresponding to the identifier and then performing multiple accesses with the plurality of communication devices through a corresponding protocol, wherein the multiple access is performed through a base station using a Bluetooth device. A wireless communication network and a Bluetooth AP communication network adjacent to a vehicle location are simultaneously connected.

Preferably, the identifier is characterized in that the class information transmitted by the communication device.

Preferably, the identifier is characterized in that the class information and mobile phone information transmitted by the communication device.

Preferably, the protocol is characterized in that it comprises a profile of SPP, PAN, HFP, DUN, A2Dp, AVRCP, PBAP.

Preferably, the information stored in the storage device included in the vehicle at the time of the multiple access can be used simultaneously.

As described above, according to the present invention, in a multi-access environment in which a plurality of wireless channels can be connected at the same time, information of a mobile phone and data of other devices can be classified and transmitted and received according to respective protocols. There is an advantage that can be provided.

In addition, the present invention is equipped with a communication module for supporting AP (access point) communication in the vehicle, a plurality of devices mounted on the vehicle can be connected to the Bluetooth communication network or the AP communication network of the vehicle, respectively, to provide or interoperate with different services. There are no conflicts or restrictions.

The present invention maintains a plurality of radio channels (RF), so that various devices can be connected, and protocols of different devices are different. Therefore, different protocols should be applied to the radio channels. In addition, among the contents of one wireless communication, a plurality of different communication is designed to be possible through the operation of software, and then used for application operation by assigning classification information (COD: Class of Device) of different devices. Allows you to determine the type of software. That is, in order to operate multiple access software in one RF radio channel, a processor (processor, CPU) controlling a communication module separates various software functions using a virtual machine. . In one embodiment of the present invention, the function of the virtual machine is generally used by using a function function call (API), and by selecting a semiconductor that provides various function functions, it is possible to smoothly support a multi-access function. Provide hardware and software systems.

Conventional vehicle wireless communication system only performs a single communication connection for hands-free or AP communication, but if you use the multi-connection communication function supported by the communication protocol, consumers can use various devices and various types of contents, services, information, etc. Can be provided to In an embodiment of the present invention, by connecting the AP, which is the communication of the infrastructure, with the communication system of the mobile phone or the notebook, which is carried by the consumer, to the characteristics of mobility of the vehicle, the utilization of the consumer may be increased by expanding the communication network of the AP. Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 is a block diagram illustrating a vehicular wireless communication system according to an embodiment of the present invention.

As shown, the wireless communication system for a vehicle includes a memory 110, a CAN communication network 120 for connecting with an in-vehicle electronic device, a Bluetooth module 130 capable of multiple access using Bluetooth technology, and a memory 110, It includes a controller (processor CPU) 140 for controlling whether to transmit or receive data between the CAN communication network 120 and the Bluetooth module 130. The wireless communication system for a vehicle is characterized by transmitting and receiving data with an external Bluetooth communication device (150, 160, 170) through the Bluetooth module 130.

FIG. 2 is an explanatory diagram showing multiple accesses of the vehicular wireless communication system illustrated in FIG. 1. Specifically, the data transmitted and received between the vehicle wireless communication system and the external Bluetooth device has been described.

As shown, vehicle information is stored in the memory 110 from in-vehicle electronic devices connected through the CAN communication network 120.

When the controller 140 sends a communication connection signal to the Bluetooth module 130 for multiple access, the Bluetooth module 130 attempts to connect to external Bluetooth communication devices 150 and 160 in the vicinity of the vehicle. In this case, the Bluetooth module 130 uses a serial port profile (SPP). Here, the serial port profile (SPP) defines how to set virtual serial ports and how to connect two Bluetooth-enabled devices. Recently, RFCOMM is used in the serial port profile, which is the base of the LAN access point, which is a representative application of Bluetooth. RFCOMM supports multiple emulation that can open 60 ports at the same time. Emulation can emulate multiple serial ports between two Bluetooth devices, but it is also possible to emulate multiple serial ports with multiple Bluetooth devices. In response to a communication connection through a serial port profile (SPP), external Bluetooth communication devices 150 and 160 transmit a response signal including a Bluetooth address and class of device (COD) information. In another embodiment of the present invention, a PAN profile (Personal Area Networking Profile), which is a data transmission profile mainly used in Bluetooth, or a profile such as HFP, DUN, A2Dp, AVRCP, or PBAP may be used.

After multiple accesses between the Bluetooth module 130 and the external Bluetooth communication devices 150 and 160, data is transmitted and received using protocols and channels connected thereto, and in case of necessary data, the memory 110 is transmitted through the controller 140. Save to or retrieve the stored data.

3 is a flowchart illustrating a multiple access method of a wireless communication system according to an embodiment of the present invention. Specifically, FIG. 3 illustrates a technique of classifying and processing multiple access devices by using class (CoD) information when accessing AP communication.

As shown, in the standby state of the vehicle wireless communication system (S302) confirms the communication connection request (S304). If there is a communication connection request, the connected communication device after the communication connection (S306) is identified through class (Cod) information included in the response signal (S308).

In the case of general data communication through the class information (S310), data communication is performed. After checking whether the data communication is terminated (S312), when the data communication is terminated, the corresponding communication process is terminated (S314).

On the other hand, if the class supports multiple access (S316), prepare for multi-access communication (S318). After confirming the communication connection (S320), if confirmed connects the communication (S322). When communication is connected, multi-access communication is performed through the corresponding class information (S324), and after confirming whether data communication is terminated (S326), when the data communication is terminated, the corresponding communication process is terminated (S314).

As described above, in an embodiment of the present invention, a process is performed by distinguishing general data communication from multi-access communication by using only class information received from a communication device using an existing Bluetooth communication device without adding a separate device. It is characterized by progress. Although it is possible to perform general data communication and multi-access communication using a device capable of data communication without adding a separate device, there may be a limitation when a plurality of communication processes are performed using a single device.

4 is a flowchart illustrating a multiple access method of a wireless communication system according to another embodiment of the present invention.

As shown, in the standby state of the vehicle wireless communication system (S402) confirms the communication connection request (S404). If there is a communication connection request, the controller for identifying a separate multiple access device after communication connection (S406) classifies the connected communication device through the class (Cod) information included in the response signal (S408).

Hereinafter, according to the class information, in the case of general data communication (S410), the data communication connection is made (S412). In addition, in the case of multi-access communication (S416), the communication connection is made by applying the protocol of the multi-access device (S418). General data communication processes the data received through the communication process (S414) using the AP communication protocol (AAP, VMP, etc.) (S422). When the protocol of the multi-access device is applied, data is processed through a processing device such as a Bluetooth phone (S420) through a data protocol such as AAP or CAN (S424). After checking whether each communication connection is individually terminated (S426), if terminated, the communication process ends (S428).

Including a control unit for distinguishing multiple access devices in a vehicle wireless communication system, each process can be performed independently using a separate protocol according to the characteristics of the communication process. However, when using the class information received from the communication device in the data communication process, there is a disadvantage that it is not possible to freely set the class information of the communication devices located in the vicinity of the vehicle. Hereinafter, in order to overcome such disadvantages, an embodiment of clearly distinguishing a process between communication devices by transmitting separate data in addition to class information will be described.

5 is a flowchart illustrating a multiple access method of a wireless communication system according to another embodiment of the present invention.

As shown, in the standby state of the vehicle wireless communication system (S502) confirms the communication connection request (S504). If there is a communication connection request, the control unit that separates the separate multiple access devices after the communication connection (S506) distinguishes the connected communication device through the reception of the mobile phone data included in the response signal (S508). Here, the mobile phone data may be understood that the communication device connected to the in-vehicle communication system is a mobile phone of another user, and may be distinguished from information transmitted by multiple access communication devices located in the vicinity of the vehicle.

Hereinafter, according to the class information, when corresponding to the mobile phone data communication (S510), a communication connection is made using the mobile phone (S512). In addition, in the case of multi-access communication (S516), a communication connection is made by applying a protocol of the multi-access device (S518). Connection of communication using a mobile phone processes data received through a communication process (S514) using a protocol used in an existing wireless communication network (CDMA, 3G communication network, etc.) (S522). When the protocol of the multiple access device is applied, the data is processed through a communication device that transmits and receives data through the AP protocol (S520) (S524). After checking whether each communication connection is individually terminated (S526), if terminated, the communication process ends (S528).

Through the above-described embodiment, it is possible to distinguish and process data obtained from a process through an external infrastructure AP (Access Point) and a process using a mobile phone communication using a base station by using initial information of a Bluetooth device of a vehicle and a mobile phone Bluetooth device. It is possible.

Conventionally, in addition to the difference in the radio wave output (CLASS 1, 2) as well as the concept that the equipment to be connected to separate operation was developed in the vehicle. As a result, as the characteristics of the system are not developed for a single communication function but for developing a single communication function, there is a problem in that two or more identical communication modules are mounted in one vehicle. Such a conventional problem results in a cost increase of the vehicle and a weight / package problem, which is a major obstacle in improving the compactness of a small car such as the expansion and application of new technology.

However, the present invention is characterized by using a car ubiquitous system (Car Ubiquitous System) using a fixed infrastructure communication called the AP, compared to the technology centered on the mobile phone. In addition, in the present invention, the information stored in the storage device included in the vehicle can be shared and used at the same time through the unified communication system, thereby increasing the efficiency of the service that can be received through the plurality of communication connections. In particular, the multi-access communication system of the present invention unifies two or more communication modules in a vehicle, and provides a plurality of physical channels through a physical radio connection (RF) and a service content control (CPU) function for various services and protocols. After forming a plurality of protocols, service / content corresponding to a communication protocol is provided by the CPU (MCU).

Preferred embodiments of the present invention described above are intended for purposes of illustration, and those skilled in the art will be able to make various modifications, changes, substitutions and additions through the spirit and scope of the appended claims, and such modifications may be made by the following patents. It should be regarded as belonging to the claims.

1 is a block diagram illustrating a vehicular wireless communication system according to an embodiment of the present invention.

2 is an explanatory diagram showing multiple connections of the wireless communication system described in FIG.

3 is a flowchart illustrating a multiple access method of a wireless communication system according to an embodiment of the present invention.

4 is a flowchart illustrating a multiple access method of a wireless communication system according to another embodiment of the present invention.

5 is a flowchart illustrating a multiple access method of a wireless communication system according to another embodiment of the present invention.

Claims (5)

A wireless transceiver for receiving identifiers from a plurality of communication devices; And A single communication control device for forming a plurality of wireless channels corresponding to the identifier and then performing multiple accesses with the plurality of communication devices through a corresponding protocol; The multiple access is a Bluetooth system for a vehicle, characterized in that for simultaneously connecting a wireless communication network via a base station and a Bluetooth AP network adjacent to the vehicle location using a Bluetooth device. The method of claim 1, The identifier is a vehicle Bluetooth system, characterized in that the class information transmitted by the communication devices. The method of claim 1, The identifier is a vehicle Bluetooth system, characterized in that the class information and mobile phone information transmitted by the communication devices. The method of claim 1, The protocol is a vehicle Bluetooth system characterized in that it comprises a profile of SPP, PAN, HFP, DUN, A2Dp, AVRCP, PBAP. The method of claim 1, The Bluetooth system for a vehicle, characterized in that for sharing the information stored in the storage device included in the vehicle can be used simultaneously.

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