Abstract
Long term evolution-advanced (LTE-A) system introduces carrier aggregation (CA) technique to improve the user throughput by aggregating multiple component carriers (CCs). Previous research works related to downlink radio resource allocation with carrier aggregation have not considered the delay factor and the error probability. Therefore, the previous methods are unable to provide better quality of service (QoS) compared to the LTE-A standard. This paper considers the radio resource management problem by zooming into the head of line delay, probability of packet loss, and the delay threshold for different types of data. In doing this, several constraints are imposed following the specifications of LTE-A system. Hence, an improved method is developed in this study to enhance the system throughput and to maintain the computational complexity. Extensive simulations were carried out with other well-known methods to verify the overall performance of the proposed method. The result obtained indicates that the proposed method outperforms the previous methods in the measurement of average user throughput, average cell throughput, fairness index, and spectral efficiency.
Highlights
IntroductionLTE is introduced as the fourth generation (4G) mobile communication by 3GPP in Release-8(Rel-8) which is based on the Orthogonal Frequency Division Multiple Access (OFDMA) technology.With some modification in Release-9 (Rel-9), LTE has set a benchmark in achieving peak downlink data rate of 300 Mbps and better (QoS) than the 3G network
LTE is introduced as the fourth generation (4G) mobile communication by 3GPP in Release-8 (Rel-8) which is based on the Orthogonal Frequency Division Multiple Access (OFDMA) technology
The problem involves with component carriers (CCs) selection and resource blocks (RB) allocation of the selected CCs under specific constraints as specified in Long term evolution-advanced (LTE-A) standard
Summary
LTE is introduced as the fourth generation (4G) mobile communication by 3GPP in Release-8(Rel-8) which is based on the Orthogonal Frequency Division Multiple Access (OFDMA) technology.With some modification in Release-9 (Rel-9), LTE has set a benchmark in achieving peak downlink data rate of 300 Mbps and better (QoS) than the 3G network. The current forecast of future demand indicates that the immense challenge is far beyond the initial establishment of 4G Due to both the explosion of mobile data traffic along with new services and applications, it is necessary to upgrade the LTE system. In Rel-10, LTE-A proposed CA for supporting wider bandwidth up to 100 MHz [2] This technology is known as channel aggregation, which uses multiple (maximum five) CCs of different frequencies joined together to form a higher overall transmission bandwidth and is used to provide an improved throughput as required for LTE-A system. Each CC may appear as LTE carrier to the legacy users
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