TRANSMISSION DEVICE AND TRANSMISSION METHOD USING MULTICAST SCHEME

In hereinafter, the present invention according to in the embodiment with reference to the attached drawing are detailed as follows. However, in the embodiment or the present invention is not the limited number by one. Each drawing number exhibits the same member to the same references.

The terminal device and transmitting transmission over a Multicast scheme described specification between D2D method using a communication terminal capable of receiving Multicast intermediate obtained normally service and, skeins video CODEC (Scalable video codec) when using Multicast, enhancement layer terminal using a communication between D2D can be sharing.

Figure 1 shows a transmission over a Multicast scheme according to one embodiment of the invention therefore representing block device are disclosed.

Transmission over a Multicast scheme of the present invention device (100, hereinafter, transmission device) is connecting portion (110), searches (120) and processing unit (130) can be a.

Door unit (110) is Multicast channel for communicating content on a terminal transmitting group, by requests participation in the novel terminal, said content receiving an inquiry about whether the new mobile terminal along an outer periphery of said substrate. I.e., door portion (110) comprises a plurality of terminal for content delivery during an at least one new terminal requests a content transfer, novel can be querying to the total received content to a terminal. For example, sports broadcasting Multicast channel transmission over a terminal group, the same new terminal (i.e., new terminal) sports broadcasting a terminal requests a group participants, door unit (110) is to be received the entire sports broadcasting terminal failing whether be novel.

Searching unit (120) for receiving said inquiry is said desired reply is to make it an entire new terminal from said content, said content requests participation in the previous number 1 at the point that the number can be , said terminal group terminal search each other. I.e., searches (120) is part of a new terminal communicates with the content (i.e., content number 1) number can be terminal can search. For example, requests participation in sports broadcasting of novel terminal at the beginning before the beginning second half (i.e., number 1 content) desired reception of broadcast knocked a second half is inputted reply, searching unit (120) includes a novel terminal knocked broadcasting number can be terminal can search.

In addition, searching unit (120) includes said terminal group belong to the content are transmitted said number 1, D2D (device-a to a-device) capable of communicating terminal can search. I.e., searching unit (120) includes a terminal receives the content via the Multicast group initially participate, a new terminal and D2D Multicast communication terminal may help can be searching. Multicast has been agree to a terminal (terminal to communicate with a terminal group) receiving the Image ID is registered in a terminal server, server can request the disclosure D2D communication. I.e., searching unit (120) includes a new terminal and terminal capable of communication D2D is searched, toward the terminal registration server party terminal in sufficient channel quality to the terminal can be ensured between the new mobile terminal can be searching.

Processing unit (130) includes said number 1 number the searched content can be terminal, said terminal group to said point number 2 after joining said new terminal requests participation in the Multicast channel through said content while transmitting, said number 1 through said unicast channel content components in the new mobile terminal. I.e., processing unit (130) when a terminal the searched, and number 2 content was transmitted through a multi-cast, a novel unicast channel number 1 content can be sent to the terminal. For example, when the new terminal communicate with terminal not retrieved, processing unit (130) joining a new terminal is a terminal group such as other terminal transmits a second half broadcast (i.e., number 2 content) Multicast, at the same time (i.e., number 1 content) novel terminal through a unicast channel broadcast knocked can be directly.

In addition, processing unit (130) includes said number 1 number content can be terminal once retrieved, said novel terminal to said terminal group while transmitting through said number 2 joining a Multicast channel said content, said new terminal between said retrieved terminal, setting a D2D channel, said D2D said number 1 content can be the external channel. I.e., processing unit (130) includes a terminal capable of communicating in the vicinity of new mobile terminal when retrieved, transmitted through a multi-cast content and number 2, the external content can be retrieved from a terminal number 1. For example, when new terminal communicate with terminal are retrieved, processing unit (130) joining a new terminal is a terminal group such as other terminal transmits a second half broadcast (i.e., number 2 content) Multicast, a terminal (i.e., number 1 content) is set knocked broadcasting channel D2D retrieved the external terminal can be derived.

Figure 2 shows a transmission device of the present invention also one in the embodiment according to the content via the industrial to explain surface are disclosed.

A plurality of terminal (230, 250, 270) for content delivery which multi-cast data, new mobile terminal (250) when the story is said to be received content Multicast channel equal, one of the present invention in the embodiment according to transmission device (200) includes a content transfer can be processing as follows. One of the present invention in the embodiment according to transmission device (200) is Multicast join the new terminal including an intermediate (250) to, for content delivery and join point which is an new terminal (250) it doesn't front portion received the peripheral terminal (230, 270) can be from the external.

In addition, if the Image as well as the whole content is embodiment terminal (230, 250, 270) to be sent to, downloading the entire movie receives terminal (230, 250, 270) the cover when the same capacity in the embodiment according to the received multi-cast data transmission device of the present invention various one (200) can be applied.

First, transmission device (200) includes a new terminal (250) reduces current Multicast is requested download content thereof can.

Next, transmission device (200) is downloaded new mobile terminal requesting the download of content is desired not only based on the embodiment and method for reconstructing the desired can be whether an entire content for downloading.

To download the download of content is based on the embodiment and method for reconstructing only in case, transmission device (200) includes a new terminal (250) via the terminals currently Multicast (230, 270) for content delivery such as a can.

When a request for an entire content download, transmission device (200) includes a new terminal (250) determining and Multicast in the vicinity of the terminal (230, 270) D2D (device-a to a-device) in communication via the headend stores terminal can be retrieving content.

D2D communication terminal for use in the event of a successful search, transmission device (200) includes a new terminal (250) multi-cast while transmitting the content, retrieved therefrom and terminal to perform communication terminal D2D can. New terminal (250) and stored in the Multicast content down near terminal (230, 270) remaining from receiving a free end portion sharing is equal to or higher.

D2D communication terminal for interacting with a search there, transmission device (200) includes a download request point transmits content after multi-cast, previous front content download request time, unicast channel receiving the new terminal (250) can be sent. I.e., new mobile terminal (250) and Multicast content stored in the unicast channel transmitting the remaining front down device (200) is equal to be directly received from.

Also described the back 1, processing unit (130) is Multicast from the group content request a planarization layer to said terminal, said terminal group terminal basic layer (base layer) on a test content enhancement layer (enhancement layer), and Multicast channel transmission over, each displays the basic layer and said enhancement layer is transmitted to said terminal, Multicast channel said channel can be associated with evaluating the quality. I.e., processing unit (130) when the Multicast channel for communicating content on a, skeins video CODEC (scalable video codec) for transmitting the basic layer and enhancement layer can be, that a channel can be evaluating the quality enhancement layer is transmitted. Wherein, the base can be basic information content, quality of information content enhancement layer can be can be.

In addition, processing unit (130) includes a basic layer is transmitted all said terminal group in said terminal, said terminal group if at least some of said enhancement layer is not transmitted to the terminal, said lower channel quality can be evaluated. I.e., processing unit (130) includes a basic layer and enhancement layer terminal can be rated both good channel quality if transmitted. While, processing unit (130) includes a basic layer but not transmitted to the terminal group transmitted to only the terminal part of the enhancement layer or both if, bad channel quality can be rated.

In addition, processing unit (130) is in the group number 1 terminal and said enhancement layer is transmitted said terminal, said terminal step said enhancement layer is not transmitted in the group number 2, D2D channel set, said enhancement layer is said D2D can be the external channel. I.e., processing unit (130) includes a terminal D2D communication function receives the enhancement layer receive number 1 number 2 terminal enhancement layer to share that doesn't receive enhancement layer can be set.

In addition, processing unit (130) includes said D2D channel are achieved or, if all the terminals in said terminal group said enhancement layer is not transmitted number 2 terminal, said enhancement layer a, said number 2 through a unicast channel can be sent to the terminal. I.e., processing unit (130) that doesn't receive unicast channel number 2 terminal receiving enhancement layer is directly form a gap layer can be transmitting.

In the embodiment according to Figure 3 shows a transmission device of the present invention also describe industrial enhancement layer through one surface are disclosed.

Participating terminal base station away from the Multicast group when poor channel state, transmission device (300) includes a MCS - level (MCS-a level) and low in the case of video data or may send a video CODEC (scalable video codec) can be applying skeins.

One of the present invention in the embodiment according to transmission device (300) includes a participating terminal Multicast groups of channels if poor state, a basic layer Multicast all terminal (320, 340, 350, 360, 370, 380) can be common transmission. In addition, transmission device (300) includes some Multicast over unicast to remaining enhancement layer can only terminal. In addition, transmission device (300) is transmitted enhancement layer is terminals can be shared so that the D2D between communication function. Enhancement layer next process the transmission and can be shared.

First, transmission device (300) a terminal group (320, 340, 350, 360, 370, 380) thereof can (step i) the Multicast is requested.

Next, transmission device (300) a terminal group (320, 340, 350, 360, 370, 380) can be evaluating the average channel quality (step ii).

Terminal group (320, 340, 350, 360, 370, 380) average channel quality if good, transmission device (300) includes terminals (320, 340, 350, 360, 370, 380) to transmit both basic layer and enhancement layer can be (step iii).

Terminal group (320, 340, 350, 360, 370, 380) channel quality since the case, transmission device (300) includes terminals (320, 340, 350, 360, 370, 380) can be basic layer to transmit. However, in the case of enhancement layer, transmission device (300) that can be part of an odd prime number is sent to the terminal is equal to the data terminal (step iv) cannot be accomplished.

If a small number of some terminal enhancement layer is transmitted, transmission device (300) receiving terminal as reference terminals D2D enhancement layer is between connection paths (310, 330) can be set. In Figure 3 of dashed lines of the oval, enhancement layer receiving terminal (340, 370) and D2D communication rate exhibits sufficient area that can be ensured.

For example, transmission device (300) includes a terminal receives the enhancement layer (340, 370) about, enhancement layer receives terminal (340, 370) and D2D antenna terminals (320, 360, 380) can be set. I.e., transmission device (300) includes a terminal receives the enhancement layer (340) that doesn't receive an enhancement layer transmission terminal (320) connected to D2D (310) the growth direction, enhancement layer receives terminal (370) that doesn't receive an enhancement layer transmission terminal (360, 380) connected to D2D (330) can be set so as to capable (step v). Enhancement layer receiving terminal (340, 370) is D2D communication function enhancement layer information into another terminals (320, 360, 380) to share to can be.

Transmission device (300) is received enhancement layer to D2D intonation (350) for transmitting enhancement layer via unicast (step vi) can be.

If any terminal when enhancement layer also receive a nail, transmission device (300) is best D2D communication efficiency (the widest D2D communication coverage with negative) terminal through enhancement layer can be a unicast transmission. I.e., any D2D communication area (3310, 330) doesn't even provided terminal (350) transmission device (300) thereof can receive enhancement layer through unicast.

This, transmission over a Multicast scheme of the present invention device (100) a terminal using a communication between wireless Multicast increasing D2D, intermediate terminal to join the Multicast number can be normally entire content.

In addition, transmission over a Multicast scheme of the present invention device (100) is placed in an environment poor D2D Multicast group channel state communication function, by skeins of video CODEC enhancement layer receive the plurality of mobile stations, to improve communication quality can be multi-cast data.

Figure 4 shows a transmission over a Multicast scheme according to one embodiment of the invention method are also shown specifically the workflow is disclosed.

The above method a transmission over the Multicast scheme in the embodiment according to priority for transmission over a Multicast scheme device (100) can be performed by.

First, transmission device (100) includes a Multicast channel for communicating content on a terminal transmitting group, by requests participation in the novel terminal, said content receiving an inquiry about whether the whole of the novel terminal S. (410). I.e., step (220) comprises a plurality of terminal for content delivery during an at least one new terminal requests a content transfer, total received content to a terminal to be a novel querying process. For example, sports broadcasting Multicast channel transmission over a terminal group, the same new terminal (i.e., new terminal) sports broadcasting a terminal requests a group participants, transmission device (100) includes a novel terminal to be received whether be sports broadcasting the entire failing.

Next, transmission device (100) for said new terminal from said inquiry is desired reply is to make it difficult for all said content, said content requests participation in the previous number 1 at the point that the number can be , said terminal group terminal search each other (420). I.e., step (420) is part of a new terminal communicates with the content (i.e., content number 1) number can be a terminal the web. For example, requests participation in sports broadcasting of novel terminal at the beginning before the beginning second half (i.e., number 1 content) desired reply reception of broadcast knocked a second half is inputted, transmission device (100) includes a novel terminal knocked broadcasting number can be terminal can search.

In addition, step (420) includes said terminal group belong to the content are transmitted said number 1, be a D2D communication terminal capable of the web. I.e., transmission device (100) includes a terminal receives the content via the Multicast group initially participate, a new terminal and D2D Multicast communication terminal may help can be searching. Multicast has been agree to a terminal (terminal to communicate with a terminal group) receiving the Image ID is registered in a terminal server, server can request the disclosure D2D communication. I.e., transmission device (100) includes a new terminal and terminal capable of communication D2D is searched, toward the terminal registration server party terminal in sufficient channel quality to the terminal can be ensured between the new mobile terminal can be searching.

Next, transmission device (100) includes said number 1 number the searched content can be terminal, said terminal group is at a point after said joining said novel terminal requests participation in the number 2 content while transmitting through said Multicast channel, said number 1 through said unicast channel content components in the new mobile terminal (430). I.e., step (430) when a terminal the searched, and number 2 content was transmitted through a multi-cast, a novel unicast channel number 1 content is sent to the terminal can be determined. For example, when the new terminal communicate with terminal not retrieved, transmission device (100) joining a new terminal is a terminal group such as other terminal transmits a second half broadcast (i.e., number 2 content) Multicast, at the same time (i.e., number 1 content) novel terminal through a unicast channel broadcast knocked can be directly.

In the embodiment according, transmission device (100) includes said number 1 number content can be terminal once retrieved, said novel terminal to said terminal group while transmitting through said number 2 joining a Multicast channel said content, said new terminal between said retrieved terminal, D2D (device-a to a-device) channel set, said D2D said number 1 content can be the external channel. I.e., transmission device (100) includes a terminal capable of communicating in the vicinity of new mobile terminal when retrieved, transmitted through a multi-cast content and number 2, the external content can be retrieved from a terminal number 1. For example, when new terminal communicate with terminal are retrieved, transmission device (100) joining a new terminal is a terminal group such as other terminal transmits a second half broadcast (i.e., number 2 content) Multicast, a terminal (i.e., number 1 content) is set knocked broadcasting channel D2D retrieved the external terminal can be derived.

In the embodiment according, transmission device (100) is Multicast from the group content request a planarization layer to said terminal, said terminal group terminal basic layer (base layer) on a test content enhancement layer (enhancement layer), and Multicast channel transmission over, each displays the basic layer and said enhancement layer is transmitted to said terminal, Multicast channel said channel can be associated with evaluating the quality. I.e., transmission device (100) includes a Multicast channel for communicating content on a when, skeins video CODEC (scalable video codec) for transmitting the basic layer and enhancement layer can be, that a channel can be evaluating the quality enhancement layer is transmitted. Wherein, the base can be basic information content, quality of information content enhancement layer can be can be.

In addition, said step assesses the channel quality, said terminal group all basic layer is transmitted in said terminal, said terminal group if at least some of said enhancement layer is not transmitted to the terminal, said lower channel quality evaluated can be determined. I.e., transmission device (100) includes a basic layer and enhancement layer terminal can be rated both good channel quality if transmitted. While, transmission device (100) but the basic layer is transmitted or not transmitted to the terminal group to only the terminal part of the enhancement layer if both, bad channel quality can be rated.

In the embodiment according, transmission device (100) includes said enhancement layer is transmitted said terminal group number 1 terminal, said enhancement layer is not transmitted said terminal group step number 2, D2D channel set, said enhancement layer is said D2D can be the external channel. I.e., transmission device (100) includes a terminal number 1 receives the enhancement layer receive that doesn't receive D2D communication form a gap layer can be set number 2 terminal enhancement layer to share.

In the embodiment according, transmission device (100) includes said D2D channel are achieved or, if all the terminals in said terminal group said enhancement layer is not transmitted number 2 terminal, said enhancement layer a, said number 2 through a unicast channel can be sent to the terminal. I.e., processing unit (130) that doesn't receive unicast channel number 2 terminal receiving enhancement layer is directly form a gap layer can be transmitting.

This, using a communication method between the terminal transmission over a Multicast scheme of the present invention wireless Multicast increasing D2D, intermediate terminal to join the Multicast normally entire content can be number.

In addition, the method of the present invention a Multicast scheme for transmission over a communication function D2D Multicast group channel state poor metallic, skeins of video CODEC enhancement layer receive the plurality of mobile stations by, communication quality can be improve multi-cast data.

Various computational means according to an embodiment of the present invention method can be carried out through program instructions can be embodied in the form of computer-readable medium recording. Said computer-readable medium program instructions, data files, data structure or the like can be either alone or in combination. Said program instructions recorded on a recording medium in the embodiment is specially designed and constructed for those computer software that may be enable or publicly known to one skilled in the disapproval. Examples of computer-readable recording medium hard disk, floppy disk and magnetic medium (magnetic media) such as tapes, CD-a ROM, DVD (optical media) such as optical recording medium, such as magnetic - disk (floptical disk) optical medium (magneto-a optical media), and ROM (ROM), ram (RAM), such as flash memory and executing program instructions stored to hardware device specially configured multiple myelomas are included. Examples of such as machine code by a compiler program instructions are made can be carried out by a computer as well as interpreter order currently used in conventional language code comprises brilliance. Said one or more software modules for performing the operation of the hardware device in the embodiment is configured to operate as can be, and vice-versa are disclosed.

Although in the embodiment than in the embodiment described by the drawing but are limited to, if said person with skill in the art from the substrate in the art of various corresponding modifications and deformable disclosed. For example, techniques described herein or in a different order and are described method is carried out, and/or illustrating system, structure, device, such as a fixed or other method described component alone or in combination, or other suitable components or even replaced by uniformly substituted results can be achieved.

Therefore, other implementations, other claim claim also carry on those two pieces in the embodiment and ranges.