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Adaptive mobile telephony voice transport via an Internet protocol network

A network and voice technology, applied in the field of adaptive transmission of mobile phone voice communication, can solve the problems of reducing the packet sending rate and not considering the wireless interface, etc.

Inactive Publication Date: 2008-07-09
OPTIS WIRELESS TECH LLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0023] 3) If it is marked or lost, reduce the packet sending rate
The congestion control defined by the IETF does not take into account the radio interface

Method used

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  • Adaptive mobile telephony voice transport via an Internet protocol network
  • Adaptive mobile telephony voice transport via an Internet protocol network
  • Adaptive mobile telephony voice transport via an Internet protocol network

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Embodiment Construction

[0046] The key factor of the above rate control is to use only one encoder and only one decoder on the whole end-to-end path. Rate control makes the selected rate suitable for all links on the path. This principle idea is now embodied in the proposed solution incorporating IP congestion handling. The solution will combine air interface adaptability with adaptability in the IP network, as described above. One case is used for VoIP on the packet core network (GPRS with IP backbone network in GSM / WCDMA); the other involves circuit switching services on the IP backbone network.

[0047] Figures 4a and 4b show the principles of the invention in GSM and UMTS networks respectively, where rate adaptation is used for the case in wireless and IP transport networks. Rate adaptation is performed according to available resources in the wireless and some intermediate IP networks. The interaction process can be described as follows:

[0048] 1) Two mobile stations, preferably CS terminal...

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Abstract

Codec rate adaptation for wireless circuit-switched voice communications routed through a packet-based network. A Mobile Station (MS) preferably with Circuit Switched services participating in a voice communication with a distant terminal transmits an initial CMR identifying an initial maximum speech coding rate selected as a function of a downlink radio quality. At each intermediate network node, one or more operational parameters are determined by using an Explicit Congestion Notification (ECN) protocol. When a CMR is received at each network node, if the operational parameters are not within a predetermined range suitable for the transmission of speech packets through the network using the initial maximum speech coding rate the maximum speech coding rate identified in the CMR is reduced as a function of the operational parameters and then forwarded toward the distant terminal.

Description

technical field [0001] The present invention relates generally to voice communications, and more particularly to adaptive transmission of mobile telephone voice communications over Internet Protocol (IP) networks. Background technique [0002] Recently, Internet Protocol (IP) transport solutions have been considered for third generation (3G) networks due to their flexibility and widespread deployment of IP technology. Compared with traditional IP networks that require fast dynamic resource reservation, these networks have different characteristics, such as simplicity, low cost, severe congestion handling, and good scalability properties. [0003] The main problem with deploying networks that support quality of service (QoS) is that many applications require fairly complex management of QoS architectures to achieve good performance. Management is required to ensure that the network does not experience packet loss due to congestion. The main obstacle is that temporary misman...

Claims

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Application Information

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IPC IPC(8): H04L1/00H04L12/56H04L29/06H04Q7/22H04L47/76
CPCH04L1/0014H04L1/0026
Inventor L·韦斯特伯格
Owner OPTIS WIRELESS TECH LLC
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