Method and apparatus for efficient multimedia delivery in a wireless packet network

A multimedia and network technology, applied in the direction of wireless communication, network traffic/resource management, transmission system, etc., can solve rough and other problems

Inactive Publication Date: 2010-09-22
TELEFON AB LM ERICSSON (PUBL)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

On the downside, this approach only allows a rough level of adaptation to radio conditions

Method used

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  • Method and apparatus for efficient multimedia delivery in a wireless packet network
  • Method and apparatus for efficient multimedia delivery in a wireless packet network
  • Method and apparatus for efficient multimedia delivery in a wireless packet network

Examples

Experimental program
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Embodiment Construction

[0021] figure 1 An architecture 100 of a mobile network configured to disseminate multimedia according to the present invention is shown. It can be seen therein that the mobile station 101 communicates with the base station 102 via the air interface 103 . Base station 102 is connected to backbone network 104 . The backbone network 104 enables communication between the mobile station 101 and the radio access network and media gateway (not shown), and then to another end terminal or server 105 . In many cases, the end terminal or server 105 is capable of generating multimedia information in a format understandable by the mobile station 101 . In this case, the end terminal or server 105 can also perform the function of encapsulating multimedia information in RTP packets, and the RTP packets can be transmitted over the IP network using protocols such as UDP. In other cases, the media gateway 106 converts the signal received from the end terminal or server 105 into a format that...

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Abstract

The present invention sends multiple versions of a multimedia packet to the base station, and, based on the radio channel and traffic characteristics, an appropriate version of the multimedia packet is selected to send to the mobile station at a given time. In this way, source transmission is improved to instantaneous conditions. The steps of the present invention are performed in conjunction with RTP used for multimedia transmission over internet protocol (IP) networks. In a first embodiment, the multiple versions are sent to the base station in the same RTP packet, and the base station strips out the extraneous versions. In a second embodiment, the base station receives multiple RTP packets having identical information in the packet header in many fields, and selects an appropriate one among these for transmission to the mobile station, discarding the rest.

Description

technical field [0001] Wireless networks are used in a variety of applications. Traditionally, the main application has been voice over circuit-switched networks. The network has since been adapted to convey circuit-switched and packet-switched data. Applications such as video telephony will soon become available over higher speed networks. Background technique [0002] In this framework, there is a limited amount of functionality to adapt the service to the environment. For example, Global System for Mobile Communications (GSM) and Wideband Code Division Multiple Access (WCDMA) networks use Adaptive Multi-Rate (AMR) vocoders for speech, which help to vary the source rate as channel conditions change in order to achieve the best best perceptual performance. In AMR there is a way of signaling to the distant vocoder that receiver conditions have changed and a different vocoder rate is preferred. [0003] Typically, in such a network, one vocoder is on the mobile device an...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L29/06H04W28/06
CPCH04L65/103H04L65/605H04L65/80H04L65/765
Inventor R·拉梅什K·巴拉钱德兰T·弗兰基拉
Owner TELEFON AB LM ERICSSON (PUBL)
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