Results 141 to 150 of about 16,160 (182)
Some of the next articles are maybe not open access.
Energy Efficiency in LTE-A Network
2017 International Conference on Technical Advancements in Computers and Communications (ICTACC), 2017Due to increase in the mobile users in a cell site, the operators are insisted to provide good coverage in terms of speed and coverage even in the cell edges. This leads to higher connectivity and operative of the mobile station, which requires higher energy to perform this task efficiently.
openaire +1 more source
Reliable multicasting over LTE: A performance study
2011 IEEE Symposium on Computers and Communications (ISCC), 2011With the booming of multimedia services, the 3rd Generation Partnership Project (3GPP) has introduced the evolved Multimedia Multicast/Broadcast Service (e-MBMS) feature for LTE systems. The main objective of MBMS is to introduce real broadcast distribution capabilities into cellular systems.
Antonios Alexiou +5 more
openaire +1 more source
Packet scheduling for VOIP over LTE-A
2013 Africon, 2013LTE-A (Long Term Evolution Advanced) constitutes a significant step in the evolution of 3G systems towards 4G technologies. The performance targets set out for LTE Advanced make it an ideal solution to take care of the ever increasing demand for wireless broadband services.
Ronnie Mugisha, Neco Ventura
openaire +1 more source
Multi-Antenna Uplink Transmission for LTE-A
2012 IEEE Vehicular Technology Conference (VTC Fall), 2012Clustered DFT-S-OFDM has been accepted as the uplink multiple access scheme for LTE-Advanced. In this paper, a new transmit diversity with four transmit antennas is proposed for Clustered DFT-S-OFDM system. A modified Frequency Switched Transmit Diversity (FSTD) algorithm is proposed, where the multiple clusters can be divided into two groups by four ...
Yan Meng +5 more
openaire +1 more source
Energy efficient resource allocation in LTE-A
2013 IEEE/CIC International Conference on Communications in China (ICCC), 2013We study the resource allocation problem in LTE-A downlink transmissions. Rather than maximizing the capacity, we consider energy metrics at the BS (base station), with certain rate guarantee for each MS (mobile station). Specifically, two energy related problems are investigated.
Yu Ye +4 more
openaire +1 more source
Compressed Multicast Retransmission in LTE-A eMBMS
2010 IEEE 71st Vehicular Technology Conference, 2010Network coded retransmission without soft combining (NC ARQ) has been studied for multicast or for multiple unicast. Some papers also mentioned that the soft combining with NC information will be the proper way to improve the receiving performance. However, some papers didn't mention the detailed combining procedure, and most papers on soft combining ...
Ji Li, Zhongji Hu, Yonggang Wang
openaire +1 more source
Codebook Design for LTE-A Downlink System
2011 IEEE Vehicular Technology Conference (VTC Fall), 2011Multiple-input multiple-output (MIMO) has been adopted by long term evolution (LTE) and its updated version LTE-Advanced (LTE-A) to increase the spectrum efficiency. However, the benefits of multi-user (MU) MIMO highly rely on the accurate channel knowledge at the transmitter. So proper codebook design is a key problem for LTE-A FDD downlink system. In
Lu Wu, Jinhui Chen, Hongwei Yang, Di Lu
openaire +1 more source
Evaluacija LTE-A tehnologije [PDF]
, 2015 U radu su teoretski opisani fizički sloj i MAC podsloj LTE-A mreže. S najvećom težinom su obrađene ključne tehnologije za ostvarivanje performanski visoke kvalitete kao što su OFDM i MIMO te algoritmi za raspodjelu resursa. Rad osim teoretskog opisa sadrži i simulacijski dio u kojemu je simulirana LTE mreže za različite udaljenosti između baznih ...
openaire
LTE-A interworking for seamless service provisioning
2014 International Conference on Telecommunications and Multimedia (TEMU), 2014Following the Always Best Connection (ABC) principle of the 4th generation wireless networks users of mobile services would be provided with connectivity to the best access technology all the time. In such a context mobile devices are equipped with multiple radio interfaces allowing connectivity to the most suitable network environment based on users ...
Angelos Michalas +2 more
openaire +1 more source
Optimal multi-relay placement for LTE-A
2015 11th International Computer Engineering Conference (ICENCO), 2015Energy saving has become an important issue in wireless communications from both environment and economic considerations. In this paper, the optimal multi-relay placement (OMRP) scheme in Long Term Evolution-Advanced (LTE-A) is proposed. It determines the optimal positions of relays with the objective of maximizing the energy efficiency.
Sara M. Abo Hashish +2 more
openaire +1 more source