Voice capacity over LTE in PMR context : challenges and solutions.

Summary The professional mobile radio communications (PMR) network, which is used for public safety operation, must evolve to broadband solutions to meet the demands of users in the future. In the current broadband technologies, Long Term Evolution (LTE), developed by the 3GPP (3rd Generation Partnership Project), is considered one of the potential candidates for the next generation of PMR. Despite the fact that LTE technology supports high-speed data transmission and supports different packet sizes using adaptive modulation and coding (AMC), LTE is not yet optimized for low-speed voice communication, especially when using LTE for professional mobile radio communications (PMR) context. Therefore, in this thesis, we present solutions to enhance the voice capacity of LTE technology in the PMR context both uplink and downlink transmission. The new proposals, based on the existing LTE standard technology with adaptations, enable the reduction of data overhead and control overhead on LTE (VoLTE) in the PMR context.