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Method and apparatus for transferring video stream

A technology for video streaming and user equipment, which is applied in the field of transmitting video streaming and can solve the problem of not dealing with resolution changes, etc.

Inactive Publication Date: 2012-04-04
NTT DOCOMO INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0009] However, the prior art does not address the issue of how to handle resolution changes in IUT service situations given limited resources

Method used

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  • Method and apparatus for transferring video stream
  • Method and apparatus for transferring video stream
  • Method and apparatus for transferring video stream

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Embodiment Construction

[0062] The invention is now illustrated by way of exemplary embodiments. However, first some terms used in this description are defined.

[0063] 3GPP: Third Generation Partnership Project

[0064] UE: user equipment

[0065] IUT: Inter-UE transmission

[0066] QoE: Quality of Experience

[0067] Based on the above optimization problems, network operators face the following problems when deploying IUT services in the network:

[0068] 1. How to judge whether the IUT request is allowed?

[0069] 2. If allowed,

[0070] a. Is there any impact on the overall user quality of experience (Quality of Experience, QoE) for other users served by the same base station? And how big is the impact?

[0071] b. Should the operator allow the highest possible video resolution to be displayed at the target transmitter? Or should the operator choose another video resolution so that the overall user experience quality for all users served by the base station remains as high as possible? ...

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PUM

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Abstract

The present invention relates to a method and an apparatus for transmitting video stream, the method for transferring a video stream having a first resolution from a first user equipment to a second user equipment having a larger screen and being capable of offering a plurality of second resolutions which are higher than said first resolution, wherein one or more third user equipments are also receiving video streams through the same network entity which has a limited bandwidth capacity, said method comprising: performing an optimization operation to determine the second resolution to be selected among said plurality of second resolutions at said target user equipment for the video stream, wherein said optimization operation comprises: using utility functions as an input to said optimizing operation; and selecting the second resolution and the data rates for the streams received by said second and third user equipments after said transfer of said video stream in accordance with the result of the optimization procedure such that the combined quality measure reaches its extremum.

Description

technical field [0001] The present invention relates to methods and devices for transmitting video streams. Background technique [0002] When providing inter-UE transport (IUT) services, the problem arises how to make QoE-based resource allocation optimization and QoE-based decisions. With the IUT service defined in 3GPP, users will be able to move media across multiple devices. This includes media transfer, media retrieval, adding media, removing media, and media duplication. A complete list of all possible IUT operations can be found in TS 22.228 in subclause 7.13 (see 3GPP: TS 22.228: Service requirements for Internet Protocol (IP) multimedia core network subsystem (Stage 1) Release 10," December 2009 ). The proposed algorithm can be used in any network where the operator wants to provide IUT services. More generally, the cases where the invention is practical, described later, are not limited to IUT session transfers, but include sessions or multiple parts thereof Al...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N7/26
CPCH04N21/2662H04N21/23439H04L65/00H04N21/234363H04N21/64792H04W4/18H04N21/2402H04L65/1094H04H60/76
Inventor S·塔科尔西W·克勒雷尔
Owner NTT DOCOMO INC