US 2008/0165766 A1 · METHOD AND APPARATUS TO INDICATE MAXIMUM SCHEDULING DELAY FOR JITTER BUFFER IMPLEMENTATIONS

Abstract

In VoIP systems, there is a tradeoff between reducing number of lost packets and end-to-end delay when dealing with jitters. Increasing the jitter buffer space on a mobile wireless terminal reduces the likelihood of lost packets but increases the end-to-end delay. Decreasing the jitter buffer space shortens the end-to-end delay, but there is a greater likelihood of retransmissions and dropped packets. Optimum solution can be arrived at if the jitter buffer space on the mobile wireless terminal can be matched to the scheduling delay. This is difficult to achieve in conventional system because the scheduling delay introduced by the network is unknown to the mobile wireless terminal. Thus, constant adjustment is required. One way to overcome this problem is to apprise the mobile wireless terminal of the maximum scheduling delay.

Claims30

Dependent claims

A mobile wireless terminal capable of performing VoIP (Voice over Internet Protocol) over mobile broadband, comprising:

a jitter buffer configured to buffer the VoIP packets from a base station over a radio interface;
and
a terminal controller operatively coupled to the jitter buffer and configured to allocate an amount of buffer space in the jitter buffer sufficient for a maximum scheduling delay in the jitter buffer in accordance with a maximum scheduling delay indication associated with the mobile wireless terminal, the maximum scheduling delay indication being received from the base station over the radio interface.

Dependencies are inferred from the claim text.

Method and apparatus to indicate maximum scheduling delay for jitter buffer implementations

Life of this patent

Method and apparatus to indicate maximum scheduling delay for jitter buffer implementations

Life of this patent

Abstract

Claims30