Adaptive voice packetization

Abstract

A method is presented for adapting the packet size for VoIP communications, determined on-the-fly by the total network delay inherent at the time of packet transmission. If network delays are small relative to the maximum permissible latency for VoIP communications, the payload size per packet may be increased to maximize efficiency for the transmitted call. Alternatively, if network delays are large, the payload size per packet may be decreased in order to assure that the perceived quality of the transmitted call is acceptable.

Description

Background technique [0001] In recent years, the IEEE802.11 standard of Wireless Local Area Network (WLAN) has emerged as the mainstream technology of the "last mile" broadband wireless access network. While the primary application of these networks is to provide connectivity to devices running best-effort data applications such as email and web browsing, there is increasing focus on supporting isochronous services such as telephony services or streaming video. Voice over IP (VoIP) and Voice over WLAN (VoWLAN) are currently one of the fastest growing Internet applications. [0002] In VoIP, the speech signal is sampled at a fixed rate. The data is assembled into a "packet" that includes a plurality of headers, a payload, and one or more trailers. The header and trailer include: (i) information about the source and destination of the packet; (ii) information about the relative position of the packet in the packet flow, including the call; (iii) information about the communica...

AI Technical Summary

Problems solved by technology

Short packet intervals result in faster draining of stored energy in battery-operated mobile communication devices due to the overhead in each short packet, resulting in a higher percentage of time for the device to transmit / receive voice packets for the same amount of data

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