KR20110017817A - Method for transmitting channel information in multimedia multicast and broadcast services and method for receiving channel information in the same - Google Patents

Abstract

PURPOSE: A method for transmitting channel information in multimedia multicast and broadcast services is provided to reduce channel zapping delay which is generated in channel change. CONSTITUTION: Basic channel information(904) contains channel information about a channel which is currently watched or other channels. The basic channel information is periodically transmitted. The multimedia multicast and broadcast method comprises a still image for channels in service, a compressed moving picture for one or more service channel, sound information for one or more service channel, and text information for one or more service channel.

Description

Method for Transmitting Channel Information in Multimedia Multicast and Broadcast Services and Method for Receiving Channel Information in the same}

The present invention relates to a transmission method and a reception method of a multicast and broadcast service, and more particularly, to a channel information transmission method and channel in a multicast and broadcast service for reducing a reception channel change time, that is, a channel zapping delay. It relates to a method of receiving information.

Digital TV, IPTV, and Mobile TV services take longer to change channels than analog TV. This channel change time is defined as the term channel zapping delay.

There are many reasons for this channel zapping delay, but a common reason is that Moving Picture Experts Group (MPEG) coding is used for video compression in digital TV and mobile TV services.

That is, in MPEG, frames are divided into I, B, and P frames (I frame is information encoding a still picture of a picture, and B and P frames are encoding information of a difference from a still picture). This characteristic is because nothing can be displayed on the screen until the I frame, which is the basis for decoding the B and P frames of the changed channel, is read at the time when the channel change starts.

The channel zapping delay occurring in the mobile TV additionally includes a time required to receive service data of the changed channel according to the scheduling of radio resources in the radio access period in addition to the time taken to find such an I frame.

For example, in the mobile TV service technology, one service is scheduled to be transmitted at a predetermined time interval so that each service has a bursty characteristic for low power consumption of the terminal. It has a power saving effect, but brings more time to channel changes. Therefore, in the case of mobile TV, a channel zapping delay may be further increased due to a characteristic of scheduling a service in consideration of low power consumption.

There are many studies to reduce the channel zapping delay in each mobile TV system, and 3GPP, a mobile communication standard, is about 2 seconds including the decoding time of the codec in the mobile TV service. It is demanding to be short.

A representative technique for reducing the channel zapping delay is to receive all channel information in service as well as the current channel information, and to use this information when changing the channel. However, in this case, the power saving effect of the terminal is seen. There is a problem that can not be used in the case of a mobile communication terminal that can not be operated by the battery is restricted by the use time by the battery.

A first object of the present invention is to provide a method for transmitting channel information of a multimedia broadcast / multicast service that can reduce a channel zapping delay caused when a channel is changed in a mobile TV service using a multimedia broadcast / multicast service. .

In addition, a second object of the present invention is to provide a method for receiving channel information of a multimedia broadcast / multicast service that can reduce a channel zapping delay caused when a channel is changed in a mobile TV service using a multimedia broadcast / multicast service. will be.

In accordance with an aspect of the present invention, there is provided a method for transmitting channel information of a multimedia broadcast / multicast service according to an aspect of the present invention, including channel basic information including basic information on at least one channel in service. It may be configured to include a step and periodically transmitting the channel basic information.

Here, the channel basic information may be a still picture of at least one channel in service, a condensed video of at least one channel in service, voice information of at least one channel in service, and at least one channel in service. It may consist of one or a combination of text information.

Here, the periodically transmitting the channel basic information may be transmitted by being included as one information field in an MBMS control channel in an MBMS subframe, transmitted by being included in a padding resource in an MBMS subframe, or present in an MBMS subframe. It may be transmitted in the form of a control channel, it may be configured to be transmitted by combining at least two of the three methods.

According to an aspect of the present invention, there is provided a method for receiving channel information of a multimedia broadcast / multicast service according to an aspect of the present invention. Channel basic information including basic information on at least one channel in service is provided. Periodically receiving and receiving a channel change signal or a channel preview signal for a channel other than the channel currently being reproduced, from the user, using the received channel basic information for at least one of the at least one channel being serviced. It may comprise the step of providing information.

Here, the channel basic information may be a still picture of at least one channel in service, a condensed video of at least one channel in service, voice information of at least one channel in service, and at least one channel in service. It may consist of one or a combination of text information.

In this case, when the channel preview signal is received from a user in the step of providing information on the channel for the at least one, the still picture, the abbreviated video, and the voice information for the at least one channel in service And provide at least one of the text information to the user temporarily or sequentially, and when the channel change signal is received from the user, the still picture and the abbreviated video of a channel other than the currently playing channel. And at least one of the voice information and the text information.

Here, the periodically receiving the channel basic information may be received as an information field included in an MBMS control channel in an MBMS subframe, or may receive channel basic information included in a padding resource in an MBMS subframe, or may be received in an MBMS subframe. It may be received in the form of an existing control channel, or may be configured to be received by combining at least two of the three methods.

By using the channel information transmission method and the reception method of the multimedia multicast / broadcast service according to the present invention as described above, in a channel change by reducing the channel zapping delay caused by a service channel change in a cellular system providing mobile TV broadcasting The quality of the provided service can be improved by minimizing the discontinuity of the service felt by the user. In addition, by using the channel information transmission method and the reception method of the multimedia multicast / broadcast service according to the present invention, it is possible to immediately respond to a channel preview request as well as a case where a service channel change requested by a user is requested.

In particular, when the channel information transmission and reception method according to the present invention is used, the terminal does not need to receive not only the channel information currently being received but also other channel information in service in order to reduce the channel zapping delay. Power savings can be maintained.

1 is a time-frequency resource diagram illustrating a configuration of a conventional MBMS subframe to which a method for transmitting channel information of a multimedia broadcast / multicast service according to the present invention is applied.
2 is a conceptual diagram illustrating a conventional MBMS control channel transmission method to which a multimedia broadcast / multicast service transmission method according to the present invention is applied.
3 is a flowchart illustrating a method of transmitting channel information of a multimedia broadcast / multicast service according to the present invention.
4 is a time-frequency resource diagram for explaining an example of a method of transmitting channel basic information in a method of transmitting channel information of a multimedia broadcast / multicast service according to the present invention.
5 is a time-frequency resource diagram for explaining another example of a method for transmitting channel basic information in a method for transmitting channel information of a multimedia broadcast / multicast service according to the present invention.
6 is a time-frequency resource diagram for explaining another example of a method for transmitting channel basic information in a method for transmitting channel information of a multimedia broadcast / multicast service according to the present invention.
7 is a flowchart illustrating a method of receiving channel information of a multimedia broadcast / multicast service according to the present invention.
8 is a conceptual diagram illustrating a channel zapping delay before the channel information transmission method and the channel information reception method of the multimedia broadcast / multicast service according to the present invention are applied.
9 is a conceptual diagram illustrating a channel zapping delay after the channel information transmission method and the channel information reception method of the multimedia broadcast / multicast service according to the present invention are applied.

As the present invention allows for various changes and numerous embodiments, particular embodiments will be illustrated in the drawings and described in detail in the written description.

However, this is not intended to limit the present invention to specific embodiments, it should be understood to include all modifications, equivalents, and substitutes included in the spirit and scope of the present invention.

The terminology used herein is for the purpose of describing particular example embodiments only and is not intended to be limiting of the present invention. Singular expressions include plural expressions unless the context clearly indicates otherwise. In this application, the terms "comprise" or "have" are intended to indicate that there is a feature, number, step, operation, component, part, or combination thereof described in the specification, and one or more other features. It is to be understood that the present invention does not exclude the possibility of the presence or the addition of numbers, steps, operations, components, components, or a combination thereof.

Unless defined otherwise, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art. Terms such as those defined in the commonly used dictionaries should be construed as having meanings consistent with the meanings in the context of the related art and shall not be construed in ideal or excessively formal meanings unless expressly defined in this application. Do not.

As used herein, the term 'terminal' includes a mobile station (MS), a user equipment (UE), a user terminal (UT), a wireless terminal, an access terminal (AT), a terminal, a subscriber unit, A subscriber station (SS), wireless device, wireless communication device, wireless transmit / receive unit (WTRU), mobile node, mobile or other terms may be referred to. Various embodiments of the terminal may be photographed such as a cellular telephone, a smart phone having a wireless communication function, a personal digital assistant (PDA) having a wireless communication function, a wireless modem, a portable computer having a wireless communication function, or a digital camera having a wireless communication function. Devices, gaming devices with wireless communications capabilities, music storage and playback appliances with wireless communications capabilities, internet appliances with wireless Internet access and browsing, as well as portable units or terminals incorporating combinations of such functions. However, the present invention is not limited thereto.

As used herein, a 'base station' generally refers to a fixed point for communicating with a terminal, and includes a base station, a Node-B, an eNode-B, and a BTS. It may be called other terms such as a transceiver system, an access point.

Hereinafter, with reference to the accompanying drawings, it will be described in detail a preferred embodiment of the present invention. In the following description of the present invention, the same reference numerals are used for the same elements in the drawings and redundant descriptions of the same elements will be omitted.

The following embodiments are described based on the Multimedia Broadcast / Multicast Service (MBMS), which is being standardized in 3GPP, and in particular, after 3GPP rel-8 LTE. It should be noted that the description is based on the channel structure and service structure of an eMBMS (evolved MBMS) to be applied (in the following description, MBMS and eMBMS are used interchangeably). However, the method of transmitting and receiving channel information according to the present invention is a method for reducing channel zapping delay in mobile TV, and can be similarly applied to other mobile TV services having a similar structure. For example, the methods according to the invention can be applied to the e-MBS of IEEE802.16, which provides a similar type of service.

Cellular systems for supporting MBMS can transmit MBMS through various base station configurations, including hierarchical base station environments. In a cellular system supporting MBMS, a base station may be an MBMS dedicated base station or cell, a mixed service base station or a mixed service cell (eg, mixed cell) that supports MBMS and unicast services, a general base station that does not support MBMS, or It can be divided into cells and the like. In addition, the base station supporting the MBMS transmission includes not only a general base station but also a relay capable of generating or transmitting control information.

In an OFDM (A) -based cellular system, an MBMS Single Frequency Network (MBSFN) operation for MBMS may be introduced to improve performance of terminals in a boundary area of a base station or a cell. MBSFN operation is a method for a plurality of base stations to efficiently provide MBMS by overcoming performance degradation due to a wireless environment, such as interference to the terminal of the cell boundary. Accordingly, a separate MBMS radio frame or subframe (ie, MBSFN subframe) may be configured for transmission of control information and data packets for MBMS for MBSFN operation.

1 is a time-frequency resource diagram illustrating a configuration of a conventional MBMS subframe to which a method for transmitting channel information of a multimedia broadcast / multicast service according to the present invention is applied.

Referring to FIG. 1, the radio subframe 107 for MBMS is composed of a physical layer control channel 101 and an MBMS transmission physical channel 102, and is assigned to the physical layer control channel 101 and the MBMS transmission physical channel 102. If the length of the applied CP is different, there may be a discontinuity section 108. That is, since the normal CP is applied to the physical layer control channel 101 region and the extended CP is applied to the MBMS transmission physical channel 102 region, the discontinuous interval 108 exists as much as that. Can be.

The MBMS transport physical channel 102 is a radio resource for transmitting MBMS-related control information. The MBMS control channel (MCCH: MBMS Control Channel; 103), MBMS transport channel (MTCH: MBMS Transport Channel; 104, 105), padding And at least one of 106).

In this case, the MCCH information 103 may be included if the subframe is to transmit the MCCH information according to the MCCH change period and the repetition period. If the subframe does not transmit the MCCH information, the MCCH information 103 is not included. (To be described later through FIG. 2). The padding 106 may exist only when the resource of the corresponding subframe is larger than the MBMS control and data packet to be transmitted. In addition, the MTCH packet 104 and the MTCH packet 105 represent radio resources for transmitting data packets for MBMS. One or more MTCH packets may be multiplexed and transmitted in one MBMS subframe. If there is a lot of MCCH information to be transmitted in a subframe for transmitting the MCCH, only the MCCH information may be transmitted without the MTCH packet.

2 is a conceptual diagram illustrating a conventional MBMS control channel transmission method to which the channel information transmission method of the multimedia broadcast / multicast service according to the present invention is applied.

Referring to FIG. 2, the base station may modify and transmit the contents of the MCCH 201 according to the MCCH change period 202, and repeat the same MCCH according to the MCCH repetition period 203 within an arbitrary MCCH change period. Can transmit Therefore, the terminal that wants to receive the MBMS should acquire the MCCH information before receiving the MBMS data packet and check whether the MCCH information has changed every MCCH change period.

3 is a flowchart illustrating a method of transmitting channel information of a multimedia broadcast / multicast service according to the present invention.

Referring to FIG. 3, in the method for transmitting channel information of a multimedia broadcast / multicast service according to the present invention, the method includes: configuring channel basic information including basic information on at least one channel in service (S301) and the channel; It may be configured to include the step of periodically transmitting the basic information (S302).

Herein, the basic information on at least one channel in service refers to still image, audio information, and abbreviated image information of all or some of the channels in service including the currently broadcast service. It may be information such as a video having a bit rate lower than the bit rate or a summary video extracted only a part of actual broadcast content, and text information.

In addition, for efficient channel change with overlapping or adjacent MBSFN areas, channel basic information is configured for each MBSFN area, or a single channel basic information is integrated and transmitted to the corresponding MBSFN area so that the channel zapping delay according to the channel change between the areas is performed. It is also possible to configure channel basic information to minimize it.

Next, the step of periodically transmitting the channel basic information (S302) is a step of transmitting the channel basic information generated in the previous step (S301) through the MBMS subframe.

In this case, the channel basic information may take a different transmission scheme according to the resource status of the MBMS subframe, for example, whether or not the MCCH channel and padding resources, or may be divided and transmitted in the form of a separate control channel. .

Hereinafter, a method of transmitting such channel basic information will be described with reference to FIGS. 4 to 6.

4 is a time-frequency resource diagram for explaining an example of a method of transmitting channel basic information in a method of transmitting channel information of a multimedia broadcast / multicast service according to the present invention.

Referring to FIG. 4, the channel basic information 404 is defined as one information field in the MCCH information 403 and transmitted when the MCCH information 403 exists in the MBMS subframe 407. Can be. That is, the terminal may be configured to receive by transmitting in the form of an information field separately defined in the MCCH information 403 and addressing an information field containing channel basic information using control information. Hereinafter, the physical layer control channel 401, MCCH 403, MTCH 404, 405, padding 406, MBMS radio subframe 407, and discontinuous interval 408 are the same as described in FIG. 1. Description is omitted.

5 is a time-frequency resource diagram for explaining another example of a method for transmitting channel basic information in a method for transmitting channel information of a multimedia broadcast / multicast service according to the present invention.

Referring to FIG. 5, the channel basic information 504 may be defined and transmitted as a form of a control channel separate from the MCCH 503. In other words, the channel basic information 504 is one of the control channels separately existing outside the MCCH 503, and is defined and transmitted in the form of an independent control channel under the name of 'MBCICH (MBMS Basic Channel Information Channel)', for example. Could be

Comparing the example of FIG. 4 and FIG. 5, in FIG. 4, the channel basic information 404 is shown as a dotted line to express that it exists as an information field in the MCCH information 403, and in FIG. 5, the channel is shown. It can be seen that the basic information 504 is shown in solid lines to express that it is reproduced in a control channel form separate from the MCCH information 503.

Meanwhile, although FIG. 5 illustrates the case in which the MCCH 503 and the channel basic information channel 504 are present at the same time, as described above with reference to FIG. It is also possible if there is only a channel basic information channel 504 without 503. In general, when the MCCH is present in the MBMS subframe, channel basic information is transmitted as an information field in the MCCH as shown in FIG. 4, and when the MCCH is not present in the MBMS subframe, a separate channel is shown as shown in FIG. The channel basic information channel may be configured to be transmitted.

6 is a time-frequency resource diagram for explaining another example of a method for transmitting channel basic information in a method for transmitting channel information of a multimedia broadcast / multicast service according to the present invention.

Referring to FIG. 6, the channel basic information 604 may be transmitted by being included in the padding resource 606 when the padding resource 606 exists. That is, channel basic information may be transmitted through the padding resource to prevent waste of the padding resource and to allocate an additional resource.

Note that the above-described channel basic information transmission methods may be used selectively or in combination according to the resource allocation status of the MBMS transmission frame such as the presence or absence of the MCCH channel and the presence or absence of padding resources. shall. That is, the channel basic information may be transmitted in the information field in the MCCH channel, and when the padding resource exists, the channel basic information may also be transmitted in the padding resource.

Meanwhile, the channel basic information may also be periodically changed and transmitted by a predetermined application period. In this case, the application period of the channel basic information may correspond to the MCCH change period 203 described with reference to FIG. 2, and several channel basic information application periods may exist in one MCCH change period 203, and several One channel basic information application period may exist in the MCCH change period 230. The application period of the channel basic information may be set by the system or determined by the capability of the terminal so that the terminal may update and maintain the latest channel basic information. The channel basic information application period will be described later with reference to FIG. 9.

The channel basic information transmitted by the method for transmitting channel information of the multimedia broadcast / multicast service according to the present invention illustrated through FIG. 3 described above is received by the terminal to reduce the channel change time during the mobile TV service to the user. Can be used.

Hereinafter, the description of FIG. 7 is for explaining a method of receiving channel information of an MBMS service corresponding to the method of transmitting channel information of an MBMS service according to the present invention described with reference to FIG. 3.

That is, if the method of transmitting channel information of the MBMS service of FIG. 3 is performed by the base station, the method of receiving channel information of the MBMS service described with reference to FIG. 7 is for explaining an operation performed by a terminal receiving the MBMS service from the base station. .

Referring to FIG. 7, in the method for receiving channel information of a multimedia broadcast / multicast service according to the present invention, periodically receiving channel basic information including basic information on at least one channel in service (S701). And when a channel change signal or a channel preview signal for a channel other than the current channel is received, providing information on a channel for at least one of the at least one or more channels in service using the received channel basic information (S702). It can be configured to include.

In step S701, periodically receiving channel basic information including basic information on at least one channel being serviced may periodically receive channel basic information from a base station according to a basic channel application period at a terminal receiving an MBMS service. Step.

As mentioned above, the channel basic information refers to still image, audio information, and abbreviated image information (bit lower than the bit rate of the actual broadcast) for all or some of the channels in service including the currently broadcast service. Information such as a summary video from which only a part of the rate video or the actual broadcast content is extracted) and text information.

In this case, the resource for receiving the channel basic information by the terminal as described above with reference to Figures 4 to 6, the form of the information field in the MCCH information in the MBMS subframe transmitted by the base station, separate in the MBMS subframe transmitted by the base station It may be determined selectively or in combination of the type of the control channel of the and the type contained in the padding resources in the MBMS subframe. Therefore, the description of the resource that the terminal receives the channel basic information will be omitted.

Next, in step S702, when a channel change signal or a channel preview signal for a channel other than the currently playing channel is received, at least one of at least one channel being serviced using the received channel basic information. Provide the user with information about the channel.

The channel basic information received in step S701 is updated according to the channel basic information application period and stored in the storage space in the terminal. At this time, the channel basic information may be provided to the user at the request of the user receiving the MBMS service through the terminal. The user's request for the channel basic information may be largely divided into two types.

The first is a case where a channel change signal is input from a user to change a channel currently being viewed to another channel. In this case, the channel basic information of the change target channel requested by the user is extracted from the received channel basic information and provided to the user.

Second, the channel preview signal is input from the user. In this case, the channel basic information on all or part of at least one channel included in the received channel basic information may be extracted and provided to the user temporarily or sequentially. For example, when the channel basic information is configured as a still image, a plurality of thumbnail-type images may be displayed on a display screen, or a still image may be sequentially displayed in a slide form. In addition, even when the basic information of the channel is a low bitrate video or a shortened video, the preview screen for several channels may be simultaneously provided in the form of a small screen, or the video information for several channels may be sequentially provided. will be.

8 and 9 are conceptual views for comparing the channel zapping delay before and after the channel information transmission method and the channel information reception method of the multimedia broadcast / multicast service according to the present invention, respectively.

Referring to FIG. 8, in the conventional MBMS service transmission and reception method, the MCCH 801 is transmitted by a predetermined change period 802 and a repetition period 803 without channel basic information.

The terminal receiving the MBMS service receives the service # 1 and then starts a channel change to the service # 7 (806). The black screen section 808 occurs to the user until the channel change completion point 812 where the service # 7 is received (809) by the channel zapping delay.

That is, in the conventional service transmission and reception method, since there is no basic information about a channel other than the channel currently being received, the terminal cannot provide any information to the user during any channel change so that the black screen section 808 occurs. do.

On the other hand, FIG. 9 shows channel basic information when the terminal changes the MBMS channel using channel basic information 904 transmitted along with MCCH information, transmitted in a separate control channel form, or transmitted using a padding resource. The example to apply is shown.

The base station transmits channel basic information 904 in a subframe in which the MCCH 901 is transmitted or in a subframe in which a padding resource exists. The system may control to maintain the latest channel basic information by using a channel basic information application period 905 for setting or updating the channel basic information received according to a terminal's capability.

As shown in FIG. 9, when any terminal receiving MBMS service # 1 changes to MBMS service # 7, if there is no additional information from the channel change time point 906 to the channel change completion point 912, the channel zapping delay is delayed. As a result, a black screen section 908 that stops without any information or existing channel information is displayed and stopped.

However, the channel basic information showing the minimum information (for example, still image, audio information, low quality image information, or text information) for the MBMS service # 7 received using the channel basic information 904 before the channel change is completed. By providing the information service 911, it is possible to control that only the interrupt section 910 due to processing in which a black screen exists for a minimum time exists. Here, the interrupt period by processing means processing time required to extract and decode basic channel information required from the received channel basic information 904.

Therefore, if the channel basic information is efficiently transmitted and processed, the interrupt interval 910 due to the processing may not exist or may be limited to a minimum time defined by the system, and the channel basic transmitted to the MCCH information transmission subframe or padding resource. Receives information in advance and provides channel basic information service 911 before the channel change completion point 912 from the channel change time point 906, and controls to receive the changed service after the channel change completion point 912. By reducing the delay, inconvenience caused by the discontinuity of the service felt by the user when changing the channel can be minimized.

The channel basic information may be controlled to be updated and maintained according to the channel basic information application period 905. As described above, in addition to the method of transmitting the MCCH information in the subframe or the padding resource in which the MCCH information is transmitted, only the subchannels may be separated using only the MCCH information. In the case of forming a frame, a separate transmission channel may be configured and transmitted before and after the MCCH information transmission subframe, or may be independently transmitted according to separate scheduling information.

Although described with reference to the embodiments above, those skilled in the art will understand that the present invention can be variously modified and changed without departing from the spirit and scope of the invention as set forth in the claims below. Could be.

901: MCCH 902: MCCH change cycle
903: MCCH repetition period 904: channel basic information
905: Period of applying channel basic information
906: Channel change point 907: Service # 1 received
908: Black screen section 909: Service # 7 received
910: interrupt duration by processing
911: Channel Basic Information Service

Claims (12)

In the transmission method of the multimedia multicast / broadcast service,
Configuring channel basic information including basic information about at least one channel in service; And
And periodically transmitting the channel basic information. The method of claim 1,
The channel basic information includes a still picture of at least one channel in service, a condensed video of at least one channel in service, voice information of at least one channel in service, and text information of at least one channel in service. Channel information transmission method of the multimedia broadcast / multicast service, characterized in that consisting of one or a combination. The method of claim 1,
Periodically transmitting the channel basic information
A method of transmitting channel information of a multimedia broadcast / multicast service, characterized by including the information field in an MBMS control channel in an MBMS subframe. The method of claim 1,
Periodically transmitting the channel basic information
Channel information transmission method of the multimedia broadcast / multicast service characterized in that the transmission in the padding resources in the MBMS subframe. The method of claim 1,
Periodically transmitting the channel basic information,
Method for transmitting channel information of a multimedia broadcast / multicast service, characterized in that the transmission in the form of a control channel present in the MBMS subframe. In the method of receiving a multimedia multicast / broadcast service,
Periodically receiving channel basic information including basic information about at least one channel in service; And
If a channel change signal or a channel preview signal for a channel other than the channel currently being reproduced is received from the user, providing information on at least one channel among at least one channel in service using the received channel basic information. Method for receiving channel information of a multimedia broadcast / multicast service comprising. The method according to claim 6,
The channel basic information includes a still picture of at least one channel in service, a condensed video of at least one channel in service, voice information of at least one channel in service, and text information of at least one channel in service. Channel information receiving method of the multimedia broadcast / multicast service, characterized in that consisting of one or a combination. The method of claim 7, wherein
In the step of providing information on the channel for the at least one, when the channel preview signal is received from the user, the still picture, the reduced video, the audio information and the for the at least one channel in service A method for receiving channel information of a multimedia broadcast / multicast service, characterized by providing at least one of text information to a user temporarily or sequentially. The method of claim 7, wherein
In the step of providing information on the channel for the at least one, when the channel change signal is received from the user, the still picture, the reduced video, the audio information and the text for the channel other than the channel being played A method for receiving channel information of a multimedia broadcast / multicast service, comprising providing at least one of the information to a user. The method according to claim 6,
Periodically receiving the channel basic information
A method for receiving channel information of a multimedia broadcast / multicast service, characterized in that receiving as one information field included in an MBMS control channel in an MBMS subframe. The method according to claim 6,
Periodically receiving the channel basic information
A method for receiving channel information of a multimedia broadcast / multicast service, comprising receiving channel basic information included in a padding resource in an MBMS subframe. The method according to claim 6,
Receiving the channel basic information periodically,
A method for receiving channel information of a multimedia broadcast / multicast service, characterized in that receiving in the form of a control channel existing in the MBMS subframe.

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