Mobility

On VoIP Capacity Gains in Frame-Based Packet-Switched Wireless Networks

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Executive Summary

It is expected that future IMT-Advanced systems will operate packet-switched due to the dominance of data services. However, it is inherent to packet-switched systems to not cope well with voice services as periodic resource usage patterns are not signaled efficiently. In this paper, the authors present a simple technique to reduce the signaling overhead for resource allocations especially for Voice-over-IP (VoIP) traffic thus increasing the VoIP capacity of the system, considerably. The proposed technique assigns Persistent Resource Allocations (PRAs) per VoIP connections that are valid for a fix number of frames. Resource allocations for succeeding frames have to be signaled by new PRAs.

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