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Transmission of compressed information with real-time requirement in packet oriented information networks

A real-time transmission, wireless network technology, applied in transmission systems, network traffic/resource management, error correction/detection using block codes, etc., can solve problems such as residency and unawareness of errors, and achieve the effect of easy upgrades

Inactive Publication Date: 2004-01-28
UNWIRED PLANET
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

But if the checksum works for both UDP headers and user data, it is still possible not to know whether the error resides in the UDP header or in the user data

Method used

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  • Transmission of compressed information with real-time requirement in packet oriented information networks
  • Transmission of compressed information with real-time requirement in packet oriented information networks
  • Transmission of compressed information with real-time requirement in packet oriented information networks

Examples

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Embodiment Construction

[0049] The first technical condition required for understanding the present invention will now be described.

[0050] Figure 1a shows a mobile station MS in a mobile radio network PLMN. The mobile radio network PLMN in FIG. 1a is a GSM network. A voice connection is established between the mobile station MS and a telephone in the fixed public telephone network PSTN. The call is connected to the fixed telephone network PSTN via a base station BTS and a speech coder unit 11 (transcoder and rate adaptation unit) in the GSM network PLMN. Although there are many more nodes participating in the GSM network PLMN, Fig. 1a only shows those which are of interest to the invention. However, the nodes and interfaces shown in Figure 1a are previously known. The speech coder 11 is implemented in the base station controller.

[0051] Between the telephone TLP and the speech coder unit 11 of the fixed network PSTN, the call is carried over a PCM link. The PCM link carries calls in the for...

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PUM

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Abstract

The present invention relates to packet-distributed data transmission of compressed data. According to the invention, parity bits are supplied to the compressed data. The parity bits are used in the entire transmission chain between an encoder having compressed the data, and a decoder which decompresses it. According to one embodiment, the data is speech and the packet-distributed network is a mobile radio network with packet-distribution in included links. However, sending in the radio link of the compressed speech is circuit switched.

Description

technical field [0001] The present invention relates to electronic information transfer, and more particularly to the transfer of compressed data with real-time requirements over at least one packet-oriented transmission link. technical background [0002] In a fixed telephone network, voice between two users is usually carried over a PCM link. For a voice connection, the PCM link gives a transmission capacity of 64 kbit / s in each direction. Speech in the form of sound is picked up by the phone's microphone, which constitutes an analog speech signal. The analog speech signal can be converted into a PCM coded speech signal by sampling the analog speech signal at a rate of 8k Hz / s, and each sample is quantized and given a binary representation. At this point, the voice is converted into a 64kbit / s bit stream. [0003] In mobile radio networks, speech is sent to the other party via a radio connection between a mobile station and a fixed base station in the mobile radio netwo...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H03M13/09H03M13/11H04L29/06H04W28/04
CPCH04L29/06027H04L65/607H03M13/09H04L29/0651H04W28/04H04L65/70H04L65/1101
Inventor J·K·P·加尔亚斯
Owner UNWIRED PLANET