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Carrier aggregation (CA) has been proposed to aggregate two or more component carriers (CCs) to support a much wider transmission bandwidth for LTE-Advanced systems. With carrier aggregation, it is possible to schedule a user equipment (UE) on multiple component carriers simultaneously. In this paper, we evaluate the performance of uplink CA in LTE-Advanced systems with different CC allocation schemes...
This work is aimed at quantifying the effects of a number of system-level parameters and conditions on the amount of non-ionizing radiation dissipated in the head of cell phone users in the 850 MHz band. The three major cellular technologies of today, namely, GSM, CDMA2000 1X and UMTS, are evaluated. Five randomly chosen commercial products from each technology are investigated in terms of their Specific...
The demand for wireless multimedia communications thrives in todaypsilas consumer and corporate market. The need to evolve multimedia applications and services is at a critical point given the proliferation and integration of wireless systems. multimedia broadcast multicast services (MBMS) was introduced in third generation partnership project (3GPP) Release 6 in order to more efficiently use network...
Considering the high packet losses and low, varying bandwidth of GPRS/EDGE network and limited computation power of handheld devices, we present and implement a novel SVC video-on-demand system for hand-held devices over GPRS/EDGE network. For the purpose of handling varying bitrate, we propose a priority based layer switching (PLS) adaptation scheme for SVC stream, which not only performs online...
This contribution addresses the case when live packet-switched video is used to enrich circuit-switched speech calls in mobile telephony. Circuit-switched and packet-switched transmissions generally operate on completely different transmission paths resulting in different QoS in terms of delay and loss rates. In this case, video and audio data recorded at the same time are not multiplexed together...
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