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Method in a communication system, a communication system and a communication device

A technology of communication equipment and communication system, applied in the field of streaming transmission system, can solve the problem that the streaming transmission server does not know and cannot see the PDP allocation type, etc., and achieves the effect of improving service quality and accurate self-adaptation

Inactive Publication Date: 2007-04-11
NOKIA CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0053] In the example case above, the main problem is that the streaming server does not know what type of network channel is reserved for data transfer (it can be single or multiple PDP contexts), because it cannot see the PDP context allocation type

Method used

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  • Method in a communication system, a communication system and a communication device
  • Method in a communication system, a communication system and a communication device
  • Method in a communication system, a communication system and a communication device

Examples

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Embodiment Construction

[0070] In the following description of the preferred embodiments of the present invention, a UMTS type mobile communication terminal will be used as an example; however, it will be apparent to those skilled in the art that the present invention is not exclusively limited to this system and it can also be applied In other communication systems (eg EGPRS) where it is possible to determine various QoS classes for communication.

[0071] The Session Description Protocol (SDP) will be described in more detail below.

[0072]On the Internet Multicast Backbone (Mbone), session directory tools are used to announce multimedia conferences and communicate the conference address and media-specific information necessary for participation. The multicast backbone is the part of the Internet that supports IP (Internet Protocol) multicast, thus allowing efficient many-to-many communication. It is widely used for multimedia negotiation. Such conferences generally have the nature that close co...

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Abstract

Media streams are transmitted from a sending communication device (MT1) to a receiving communication device (NW2) at least partly via a wireless communication network. At least one media stream is selected to be transmitted to the receiving communication device, QoS requirements for transmitting the selected at least one media stream are defined, transmission resources are reserved from the wireless communication network for the transmission of the at least one media stream, and a setup procedure is performed between the receiving communication device and the sending communication device for activating the one packet data transmission connection.

Description

technical field [0001] The technical field is that of streaming media on mobile networks, where multimedia servers, mobile networks and streaming clients communicate via e.g. the RTSP protocol (Real Time Streaming Protocol) for session setup and control and e.g. RTP for media delivery. Protocol (Real-time Transport Protocol) to connect logically. Streaming systems can be rate adaptive or non-rate adaptive. The present invention relates to a rate adaptive streaming system capable of adapting content and / or transmission rate to variable network channel conditions. [0002] The invention relates to a method in a communication system, wherein a multimedia stream is transmitted at least partly via a wireless communication system from a sending communication device to a receiving communication device. The invention also relates to a communication system comprising a sending communication device, a receiving communication device and a communication network for transmitting a multim...

Claims

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Application Information

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IPC IPC(8): H04L12/56H04L45/28
Inventor 王如生伊戈尔·屈尔西奥埃姆勒·阿克叙基思·米勒
Owner NOKIA CORP