KR20060096724A - Method for setting communication band of wireless tv - Google Patents

Abstract

According to the present invention, a wireless transceiver sets preset communication band information of a wireless LAN for each type of media data and selects communication band information suitable for the type of media data to be transmitted according to a communication band setting request of a receiver. The present invention relates to a method for setting a communication band of a wireless TV that sets a band, so that the communication band can be used more effectively, thereby reducing radio interference to a minimum or increasing a communication distance.

Communication, band, media, data, type, settings

Description

Method for setting communication band of Wireless TV {Method for setting communication band of Wireless TV}

1 is a view showing a general wireless system,

Figure 2a is a block diagram showing a transceiver of the wireless TV to which the present invention is applied

2B is a block diagram illustrating the main processor of FIG. 2A as an example.

Figure 2c is a block diagram showing the receiver of the wireless TV to which the present invention is applied

3 is a flowchart showing a first embodiment of a communication band setting method according to the present invention;

4 is a flowchart showing a second embodiment of a communication band setting method according to the present invention;

5 is a diagram for explaining media data according to the present invention;

6 is a diagram illustrating a relationship between a wireless LAN band and media data according to the present invention.

7 is a diagram illustrating an example of a communication band setting request message format according to the present invention.

8 illustrates an example of a communication band response message format according to the present invention.

9 illustrates an example of an approval message format according to the present invention.

10 is a signaling flow diagram for WLAN configuration according to the present invention.

11 illustrates an example of a disapproval message format according to the present invention;

12 is a signaling flow diagram for WLAN configuration update according to the present invention.

Explanation of symbols on the main parts of the drawings

200: TV tuner unit 210: audio decoder

220: Audio ADC 230: Video Decoder

240: main processor 250: A / V data storage unit

260: WLAN driver

The present invention relates to a wireless communication band setting method for reducing the wireless interference to a minimum or increasing the communication distance by differently setting the communication band of the wireless LAN according to the characteristics of the media data.

Recently, with the development of communication technology, a lot of wireless interface means have been developed, such as Bluetooth, Wireless Fidelity (WiFi), Ultra Wide Band (UWB) system, and Wireless Local Area Network (WLAN). In addition, as the transmission speed of the developed air interface means becomes very fast, a wireless TV has been developed in which the user can easily watch a predetermined broadcast signal while moving the user by applying the air interface means to the TV. Figure is a diagram.

As shown in the drawing, a general wireless TV is divided into a transceiver 100 that transmits an AV signal wirelessly and a receiver 110 that receives a stream transmitted wirelessly and displays it through a display unit, and the transceiver 100 is airwave. Some are designed to convert analog signals from broadcasts or DVD players into digital signals such as MPEG, and some are designed to store multiple media files using a PC or the like and transmit them wirelessly without additional conversion.

The media data to be transmitted in any way can be divided into media data to be transmitted at a still rate such as JPEG or MP3 or low data rate in the form of audio, and media data transmitted at a high rate in the form of a video such as MPEG or DIVX. For media data, the mastery is important, and in the case of media data such as video, it is more important to see the image in real time than the mastery. However, conventionally, when the communication band is set, the communication band has been uniformly used regardless of the type of each media data described above.

However, in the 802.11a / b / g WLAN, the 11a band (5GHz band) is more suitable for A / V streaming even though the number of available channels is higher than that of the b / g band (2.4GHz) and there is no radio interference such as microwave oven. However, the mastery is shorter than b / g. That is, the 11a band (5GHz band) and the b / g band (2.4GHz), which are both bands of the WLAN, have characteristics that are distinguished in terms of A / V streaming and communication distance.

Therefore, rather than transmitting media data through a single preset communication band as in the prior art, it is expected that the communication band can be used more effectively if the band of the WLAN is applied differently according to its type.

Accordingly, the present invention was developed to satisfy the above necessity, and by setting the communication band of the wireless LAN differently according to the type of media data, the wireless interference can be minimized or the communication distance can be increased. The purpose is to provide a communication band setting method.

 According to an aspect of the present invention, a method of setting a communication band of a wireless TV sets different types of media data to be previously transmitted by a transceiver of a wireless TV according to the type of media data and transmitted according to a communication band setting request of a receiver. It is characterized by setting the communication band of the wireless LAN by selecting the appropriate communication band information.

According to the present invention, the communication band of the wireless LAN is set according to the communication band information only when the receiver approves the communication band information selected by the transceiver.

According to the present invention, when the receiver disapproves the communication band information selected by the transceiver, it modifies and resets the communication band information. When the disapproval continues, the transceiver transmits to the standard communication band information preset for the default. Accordingly, the communication band of the WLAN can be forced.

According to an object of the present invention, the receiver requests communication transceiver information suitable for the type of media data to the transceiver, and sets the communication band of the wireless LAN according to the communication band information transmitted by the transceiver.

According to the present invention, the receiver can determine whether to approve the communication band according to whether the WLAN driver can support the communication band information transmitted by the transceiver.

If the communication band cannot be supported by the WLAN driver according to the communication band information transmitted from the transceiver, the receiver may request other communication band information from the receiver.

According to an object of the present invention, in the initial operation before setting the communication band of the WLAN according to the type of media data, the WLAN communication band of the transceiver and the receiver is set as a preset standard communication band for default. For example, 802.11b / g may be set as a standard communication band.

According to the present invention, the communication band information includes bandwidth information, channel information within the bandwidth, and network name information.

      The communication band setting request message according to the present invention is characterized by including device identification information of the receiver and identifier information indicating the type of media data.

     According to an object of the present invention, the type of media data may be classified based on the sensitivity and transmission amount of radio interference, and may include the necessity of real time in the classification criteria.

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

First, FIG. 2A is a block diagram illustrating a transceiver of a wireless TV to which the present invention is applied. In the transceiver according to the present invention, a transceiver of a wireless TV presets communication band information of a wireless LAN differently for each type of media data, and receives a receiver. According to the communication band setting request, the communication band information suitable for the type of media data to be transmitted is selected and the communication band of the wireless LAN is set.

For example, as shown in FIG. 2A, the TV tuner 200, an audio decoder 210 for decoding the SIF signal into an analog audio signal, and an audio ADC for extracting audio clock and audio data from the analog audio signal ( 220, a video decoder 230 for decoding video signals received from the TV tuner 200 and outputting video data, a video clock signal, and a video sync signal, and an audio processor for processing audio data and video data, respectively; A main processor 240 with a built-in video processor, an A / V data storage unit 250 for storing A / V data processed under the control of the main processor 240, and a communication band set according to the type of media data. Accordingly, the configuration includes a WLAN driver 260 for transmitting A / V data.

In the transceiver of the wireless TV having such a configuration, the WLAN driver 260 receives a communication band setting request message including information indicating the type of media data from the receiver's WLAN driver and is selected by the main processor 240. Sets a communication band of a wireless LAN connecting the transceiver and the receiver according to the communication band information.

In addition, the communication band of the wireless LAN may be set according to the communication band information only when the receiver receives the approval of the communication band information detected by the main processor 240. The approval of the receiver is not performed. If not, repeatedly modify the communication band information of the WLAN until the approval of the receiver, and if the approval is made, set the corresponding communication band information to the communication band of the WLAN.

In addition, when the receiver is not approved for the communication band information of the WLAN, the transceiver may forcibly set the communication band of the WLAN according to the standard communication band information preset for the default.

The main processor 240 differently sets the communication band information of the wireless LAN for each type of media data, and upon receiving the communication band setting request message from the receiver, analyzes the file information set in the communication band setting request message. After determining the type, the communication band information matching the type of the media data is read, and then the data for approving the communication band information is checked from the receiver to set the communication band of the WLAN driver according to the communication band information. .

In addition, when the main processor 240 receives data disapproval of the communication band information selected from the receiver through the WLAN driver, the main processor 240 may retransmit by modifying the communication band information. The communication band of the WLAN driver can be forcibly set according to the standard communication band information preset for the default, and the modification of the communication band information can be directly selected as the standard communication band, or the communication band information can be set according to the preset order. It is also possible to be able to select sequentially, various modifications are possible in this range without departing from the technical spirit of the present invention.

In the initial operation before setting the communication band of the wireless LAN according to the type of media data, the communication band of the wireless LAN is set to a preset standard communication band for default, and for example, 802.11b / g, That is, the wireless LAN standard communication band can be set to 802.11b / g at the initial operation, because the control signal is insensitive to the influence of radio interference, while securing the communication distance is important.

The table may record information in which one-to-one matching of a series of allocation values indicating the type of media data and corresponding communication band information is recorded. The recording medium includes communication band information including WLAN bandwidth, channel information, and network name. May be preset differently for each type of media data.

2B illustrates a main processor 240 according to an exemplary embodiment of the present invention. As shown in FIG. 2B, a video processor 242 and an audio processor 241 for processing video data and audio data, respectively, as shown in FIG. Table 243 in which information in which an identifier indicating a type and an allocation value indicating communication band information is matched one-to-one is recorded, and communication bandwidth information including WLAN bandwidth / channel / network name information according to the type of media data is stored. Communication band setting that is connected to differently preset recording medium 244, table 243 and recording medium 244, selects communication band information according to the type of media data, and sets communication band of WLAN driver accordingly. It may have a configuration consisting of a processor (245).

In the main processor 240 according to the present invention having such a configuration, when the communication band setting processor 245 receives a communication band setting request message from the receiver by differently setting the communication band information of the wireless LAN for each type of media data, After analyzing the file information set in the communication band setting request message to find the type of the media data, the table 243 is searched for an allocation value matching the type of the media data, and the corresponding information is recorded on the recording medium 244. After reading the communication band information corresponding to the allocation value, the data for approving the communication band information is checked from the receiver to set the communication band of the WLAN driver according to the communication band information.

Figure 2c is a block diagram showing a receiver of the wireless TV according to the invention as an example, as shown in the receiver of the wireless TV according to the present invention wirelessly with the transceiver of the wireless, such as receiving the A / V data A wireless LAN driver 270 that interfaces, a communication band setting processor and a recording medium are included to set the communication band of the WLAN driver according to the communication band setting information transmitted from the transceiver, and the A / V processor is not shown through the A / V processor. The main processor 271 that processes data, the MPEG decoder 272 that decodes the A / V data processed by the main processor 271, and the A / V data decoded by the MPEG decoder 272 in a predetermined display format. A video / audio encoder 273 for encoding according to the present invention, a scaler 274 for scaling the encoded A / V data, and A / V data. It may have a structure including a display section (275).

In the receiver of the wireless TV according to the present invention having such a structure, the communication band setting processor extracts any one of the identifiers indicating the type of the media data stored in the recording medium, and puts it in the communication band setting request message to the WLAN driver 270. Transmit to the transceiver through, and sets the communication band of the wireless LAN driver 270 according to the communication band information transmitted by the transceiver in response thereto.

The communication band setting request message may include device identification information of a receiver and identifier information indicating a type of media data. According to an object of the present invention, the type of media data may be classified based on the sensitivity and transmission amount of radio interference, and may include the necessity of real time in the classification criteria.

Further, according to the present invention, the communication band setting processor may determine whether to approve the communication band according to whether the WLAN driver can support the communication band information transmitted by the transceiver, and communicate according to the communication band information transmitted by the transceiver. If the band is not supported by the WLAN driver, a message for requesting other communication band information to the receiver may be transmitted through the WLAN driver.

In addition, in the initial operation before setting the communication band of the WLAN according to the type of media data, the communication band of the WLAN driver is set as a preset standard communication band for default. For example, the standard communication band 802.11b / g can be set.

3 is a flowchart illustrating a first embodiment of a method for setting a communication band of a wireless TV according to the present invention.

As shown in FIG. 3, the communication band setting method according to the first embodiment of the present invention receives a communication band setting request message including information indicating the type of media data from a wireless LAN driver of a receiver ( S300), and sets communication band information of a wireless LAN connecting the transceiver and the receiver according to the communication band information selected by the transceiver (S304 to S306).

In addition, the communication band of the wireless LAN may be set according to the communication band information only when the receiver is approved for the communication band information detected by the transceiver according to step S308 (S310). If the approval of the receiver is not made, the communication band information of the WLAN is repeatedly modified until the approval of the receiver is made (S309). If the approval is made, the corresponding communication band information is set as the communication band of the WLAN.

In addition, when the receiver is not approved for the communication band information of the WLAN in step S308, the transceiver may forcely set the communication band of the WLAN according to the standard communication band information preset for the default.

According to the present invention, when a transceiver sets a communication band information of a wireless LAN differently for each type of media data and receives a communication band setting request message from a receiver, the transceiver analyzes the file information set in the communication band setting request message. Next, after reading the communication band information matching the type of media data (S303), the communication band information of the WLAN driver is set according to the communication band information by checking the data for approving the communication band information from the receiver. Do it.

When data disapproval of the selected communication band information is received from the receiver through the WLAN driver, the communication band information may be modified and retransmitted. If the disapproval exceeds the repetition frequency, the standard preset for the default is used. Communication band of the wireless LAN driver can be forcibly set according to the communication band information, and the modification of the communication band information can be directly selected as the standard communication band, or the communication band information can be sequentially selected in a predetermined order. Also, various modifications can be made without departing from the technical spirit of the present invention.

In the initial operation before setting the communication band of the wireless LAN according to the type of media data, the communication band of the wireless LAN is set as a preset standard communication band for default, and for example, 802.11b / g, That is, the wireless LAN standard communication band at the beginning of operation may be set to 802.11b / g.

4 is a flowchart illustrating a second embodiment of a method for setting a communication band for a wire TV according to the present invention.

As shown in FIG. 4, in the communication band setting method according to the second embodiment of the present invention, a receiver extracts any one of identifiers indicating the type of media data stored in a predetermined recording medium, and sets a communication band setting request message. When transmitting to the transceiver via the wireless LAN driver (S400), in response to the set the communication band of the wireless LAN driver according to the communication band information transmitted by the transceiver (S405).

The communication band setting request message may include device identification information of a receiver and identifier information indicating a type of media data. According to an object of the present invention, the type of media data may be classified based on the sensitivity and transmission amount of radio interference, and may include the necessity of real time in the classification criteria.

In addition, according to the present invention, the receiver may determine whether to approve the communication band according to whether the WLAN driver can support the communication band information transmitted by the transceiver (S402), and the communication band information transmitted by the transceiver. Accordingly, when the communication band is not supported by the WLAN driver, a message for requesting other communication band information may be transmitted to the receiver through the WLAN driver (S403).

In addition, in the initial operation before setting the communication band of the WLAN according to the type of media data, the communication band of the WLAN driver is set as a preset standard communication band for default. For example, the standard communication band 802.11b / g can be set.

FIG. 5 is a diagram illustrating a relationship between media data types and table value information corresponding to one-to-one correspondence. The media data types used in the present invention are assigned to table values as shown in FIG. The criterion may be a sensitivity and a transmission amount of radio interference, and may include whether or not the need for real-time in the classification criteria, for example:

1. Media data sensitive to radio interference and high in transmission: MPEG, WMV, DIVX, etc.

2. Insensitive to radio interference or small amount of transmission media data: MP3, etc.

3. Media data that does not require real time, such as still images: JPEG, BMP, etc.

FIG. 6 is a diagram illustrating a table in which a WLAN band is allocated to a media file according to the present invention as an example. As shown in the drawing, the present invention may set a band of a WLAN using a table value, for example, “1”. Since the file assigned to "is sensitive to wireless interference and has a lot of traffic, streaming service can be set by setting the WLAN to 802.11a, and the files assigned to" 2 "and" 3 "can be used as 802.11b / g. A streaming service can be set to provide a streaming service. The transceiver of the wireless TV generates the table shown in FIG. 4 and sets the communication band of the WLAN driver with reference to the information set in the table during the streaming service.

FIG. 7 illustrates an example of a communication band setting request message transmitted from a receiver according to the present invention. In the receiver of a wireless A / V streaming product, file information indicating a type of media data is transmitted to a transceiver. The communication band setting request message shown is a message format including such file information, where the device ID is an ID of a receiver device for distinguishing each receiver since several receivers may be connected to one transceiver, and the length is a type of media data. Represents the total length of the file information, and may include identifier information indicating the media data type as the file information.

FIG. 8 illustrates an example of a communication band setting response message transmitted from a transceiver according to the present invention. The transceiver receiving the communication band setting request message shown in FIG. 7 finds and maps identifier information in a database. Detecting communication band setting information, the communication band setting response message may include WLAN bandwidth information, a new network name (SSID: Service Set Identifier) to be configured, new channel information in the WLAN bandwidth, and a new wireless network. If there is no need to configure and want to use the wireless network that is already connected, SSID and channel information can input wireless network information that is already set.

FIG. 9 is a view illustrating an acknowledgment message according to an exemplary embodiment of the present invention, in which a receiver receiving a communication band setting response message shown in FIG. 8 updates a WLAN setting with transmitted communication band information and is an acknowledgment message corresponding thereto. Is transmitted to the transceiver. Such an acknowledgment message may include device ID information and message type information indicating an acknowledgment message, as shown in FIG.

FIG. 10 is a first signaling flow diagram of WLAN band setting according to the present invention, in which a transceiver sets a communication band suitable for a corresponding media data according to a communication band setting request message for a receiver and includes a communication band including the setting information. The setup response message is transmitted to the receiver, and the receiver receiving the communication band setup response message updates the wireless LAN setting with the transmitted communication band information, transmits an acknowledgment message corresponding thereto to the transceiver, and the transceiver receiving the acknowledgment message is It also converts the SSID and the channel value of the WLAN driver according to the communication band information, the wireless LAN band of the initial operation may be 802.11b / g.

FIG. 11 illustrates a disapproval message according to an exemplary embodiment of the present invention. As shown in FIG. 11, if a wireless LAN band information transmitted by a transceiver is not supported by a wireless LAN driver of a receiver, the receiver transmits a disapproved message to the transceiver. Accordingly, the transceiver may adjust and retransmit the WLAN band information to the receiver. As shown in FIG. 11, the disapproval message may include message type information indicating the disapproval message and device ID information of the receiver.

 12 is a second signaling flow diagram for WLAN band setting according to the present invention. If the WLAN band information transmitted by the transceiver is not supported by the WLAN driver of the receiver, the receiver transmits a disapproved message to the transceiver. Accordingly, the transceiver adjusts the WLAN band information and retransmits it to the receiver, and according to the communication band setting request message for the receiver, the transceiver sets a communication band suitable for the media data and the communication band setting response message including the setting information is received. In case of transmission, the receiver receives the communication band setting response message and updates the wireless LAN setting with the transmitted communication band information, and when the response message is received, the transceiver itself also corrects the SSID and channel value of the WLAN driver. Update according to one communication band information.

As described in detail above, the wireless TV communication band setting method according to the present invention can use the communication band more effectively by setting the communication band of the wireless LAN according to the type of media data to reduce the radio interference to a minimum or The effect is to increase the range.

Although the invention has been described in detail only with respect to the specific examples described, it will be apparent to those skilled in the art that various modifications and variations are possible within the spirit of the invention, and such modifications and variations belong to the appended claims.

Claims (14)

Receiving, by the transceiver of the wireless TV, a communication band setting request message including information indicating the type of media data from the receiver; Detecting a series of communication band information matching the type of the media data upon receiving the message by presetting communication band information of the WLAN for each type of media data; And And setting a communication band of a wireless LAN connecting the transceiver and the receiver according to the detected communication band information. The method of claim 1, wherein the communication band setting of the wireless LAN; And a communication band of the wireless LAN is set according to the detected communication band information according to whether the receiver is authorized for the detected communication band information. The method of claim 2, wherein the communication band setting; Transmitting the detected communication band information to a receiver and receiving a response message thereto; And if the received response message is an acknowledgment message for communication band information, setting a communication band of a wireless LAN according to the detected communication band information. The method of claim 3, wherein If the received response message is a disapproval message for a communication band; Repeatedly modify the communication band information of the WLAN until the approval of the receiver, and when the approval is made, the communication band setting method of the wireless TV, characterized in that for setting the communication band information of the WLAN. The method of claim 4, wherein When the receiver is not approved for the communication band information of the WLAN, the transceiver sets the communication band of the wireless LAN according to the standard communication band information preset for default. Way. Obtaining, by the receiver of the wireless TV, the series of communication band information matching the type of media data from the transceiver as a response to the communication band setting request; And And setting a communication band of the wireless LAN according to the obtained communication band information. The method of claim 1, wherein the communication band setting; And a communication band of the wireless LAN is set according to the detected communication band information according to whether the WLAN driver can support the obtained communication band information. The method of claim 7, wherein The communication band setting; If it is determined that the WLAN driver can set the communication band according to the acquired communication band information, the WLAN driver sets the communication band of the WLAN according to the acquired communication band information. And transmitting to the transceiver an acknowledgment message indicating that the communication band can be set according to the obtained communication band information. The method of claim 7, wherein And if it is determined that the wireless LAN driver cannot set a communication band according to the acquired communication band information, transmitting a predetermined disapproval message to the transceiver. How to set up. The method according to claim 1 or 9, A wireless communication band setting method according to claim 1, wherein the wireless LAN communication bands of the transceiver and the receiver are set as standard communication bands for a preset default when the communication band of the wireless LAN is set according to the type of media data. The apparatus of claim 10, wherein the standard communication band; Wireless b communication band setting method characterized in that the 802.11b / g. 10. The apparatus of claim 1 or 9, wherein the communication band information comprises: A wireless communication band setting method comprising the wireless LAN bandwidth information, channel information in the bandwidth, network name information.       10. The method of claim 1 or 9, wherein the communication band setting request message;      And a device identification information of the receiver and identifier information indicating the type of media data. 10. The method of claim 1 or 9, wherein the type of media data is at least one of the following: A method for setting a communication band of a wireless TV, characterized in that classified based on the sensitivity and transmission amount of radio interference.

Images