Flexible Spectrum Orchestration Of Carrier Aggregation For 5G-advanced

Han, Xianghui; Liang, Chunli; Liu, Ruiqi; Wei, Xingguang; Chen, Mengzhu; Li, Yu-Ngok Ruyue; Jin, Shi

doi:10.1109/mcomstd.0004.2200068

Cited by 1 publication

(2 citation statements)

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“…Carrier aggregation (CA), a key technology in modern mobile communication systems, emerged as a response to the ever-increasing demand for higher data rates and improved network capacity. Initially introduced as part of the 3GPP specifications for 4G LTE-Advanced [8][9][10], CA has become an integral part of subsequent mobile communication standards, including 5G/6G and beyond [11][12][13][14][15][16][17][18][19][20]. CA allows mobile devices to simultaneously use multiple frequency bands, or component carriers (CCs) in 3GPP terminology, effectively combining the available bandwidth and boosting the overall data throughput.…”

Section: Introductionmentioning

confidence: 99%

“…Despite being introduced over a decade ago, CA continues to be a relevant technique in mobile communications and an active area of research. Several aspects of CA have recently been explored such as its delay performance [12], energy efficiency [12][13][14][15], spectrum orchestration [16], integration with O-RAN [17], integrated sensing and communications [18], sidelink communications [19], and THz communications [20].…”

Section: Introductionmentioning

confidence: 99%

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Analysis of Carrier Aggregation as a Diversity Technique for Improved Spectral Efficiency and Secrecy Performance in Mobile Communications

Adamu,

López-Benítez

2024

Telecom

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Carrier aggregation (CA) was introduced in mobile communication systems in response to the demand for higher network capacity. CA was conceived as a technique to achieve higher data rates by aggregating multiple blocks of spectrum from the same or different frequency bands. This work explores a different point of view, where CA is employed not as a way to increase capacity through using more bandwidth, but as a diversity technique in order to increase the spectral efficiency of the existing spectrum, and therefore, achieve higher capacity without needing additional spectrum. A mathematical model and set of closed-form expressions are provided, which can be used to characterise the performance of CA as a diversity technique (in terms of both ergodic capacity and secrecy capacity) and determine the impact of various relevant configuration parameters. The numerical results obtained by evaluating the mathematical expressions derived in this work are in line with our previous simulation studies and demonstrate that CA can be effectively exploited as a diversity technique to improve the capacity and performance of mobile communication systems compared to the case of single-carrier transmission over the same amount of bandwidth.

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