Patent · US Active

Individual codec pathway impairment indicator for use in a communication

US8817617B2 · kind B2 · utility

3Cited by

7References

23Claims

0Family size

Assignee

Telefonaktiebolaget LM Ericsson (Publ) · SE

Inventors

Karl Hellwig · Wonfurt, DE
Dirk Kampmann · Vaals, NL
Alexandru Hlibiciuc · Aachen, DE

Key dates

Filing date	Aug 16, 2005
Grant date	Aug 26, 2014
Priority date	—
Expiry date	Oct 28, 2029

Classification

Technology area (CPC H)Electricity
CPC primaryH04W28/22
WIPO fieldDigital communication
WIPO sectorElectrical engineering

Abstract

A system and method control a setup of a connection in a communication network including a set of nodes, such as Mobile Switching Centers (MSCs) and Media Gateways (MGWs). In one example, a speech connection is established between MGWs subject to the control of the MSCs, which can selectively activate or deactivate codecs along the connection. The codecs potentially affect connection quality by differing amounts. A Total Accumulated Impairment (TAI) element is forwarded between the MSCs and updated by the MSCs that include individual partially accumulated impairment values corresponding to the supported codec candidates. Each individual indicator value provides information representative of the expected accumulated impairment along a candidate connection path leading up to, and including, the corresponding codec. By providing information pertaining to the expected accumulated impairment along each candidate connection path, the MSCs can determine an optimum sequence of codecs to minimize the overall connection impairment.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.