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Method for transmitting data packets by utilizing real-time transmission protocol and its control protocol

A technology of transmission control and real-time protocol, applied in the field of data packet transmission

Inactive Publication Date: 2003-09-03
PANASONIC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The rule that the allocated RTCP session bandwidth cannot be exceeded is still in effect

Method used

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Embodiment Construction

[0011] According to a preferred embodiment of the method, the step of determining the required RTCP bandwidth comprises the step of calculating an average rate and / or controlling the packet size. Most of the time, the control packet size is fixed, but it can also be variable. In these cases, the average size is good for calculating the required RTCP bandwidth.

[0012] Preferably the media data packets are transmitted from the sender to the receiver while the control data packets are sent in the opposite direction as feedback.

[0013] According to another preferred embodiment, the required RTCP bandwidth (in bits / second) is calculated as the product of the feedback packet size and the feedback rate.

[0014] It is best to divide the RTCP bandwidth by the RTP bandwidth to calculate the required RTCP bandwidth fraction. This share is preferably determined or agreed upon during session establishment, for example in a session description protocol. In other words, if a session ...

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Abstract

A method of transmitting data packets, in particular a real-time or near-real-time data over an internet protocol (IP) network using a real-time protocol (RTP) for media data packets and a real-time control protocol (RTCP) for control data packets. Each protocol is allocated a fraction of the available transmission bandwidth. The method comprises the steps of determining the needed RTCP bandwidth based on known link parameters for an individual media session, transmitting control data packets using the needed RTCP bandwidth and transmitting media data packets using the remainder of the available bandwidth.

Description

technical field [0001] The present invention relates to data packet transmission, in particular to real-time or quasi-real-time data transmission over Internet Protocol (IP) networks using standardized protocols. Background technique [0002] The Real-time Transport Protocol (RTP) is widely used to transmit real-time or quasi-real-time data over IP networks. With the advent of a similar protocol named Real-time Transmission Control Protocol (RTCP), it is widely used to monitor data transmission, collect statistics, and send control data in the forward direction or in the direction of feedback from the receiver to the sender. [0003] Usually, RTP limits the amount of feedback through two rules: first, a certain share (recommended 5%) of the RTP session bandwidth is allocated to RTCP. During sending feedback, all receivers share this bandwidth and use this value to calculate the duration. The second rule is that there must be at least five seconds between feedback transmiss...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L12/801H04L29/06
CPCH04L47/10H04L65/608H04L65/80H04L47/193H04L29/06027H04L65/65H04L65/1101
Inventor 卡斯滕·伯迈斯特罗尔夫·黑肯伯格
Owner PANASONIC CORP
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