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5g - Springer Nature

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Last Updated: 10 May 2022

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Silicone Rubber- BaBiLiTeO_6 Composites: Flexible Microwave Substrates for 5G Applications

This work illustrates broadband dielectric response, layout, fabrication, and testing of a microstrip patch antenna made of flexible silicone rubber–BaBiLiTeO_6 composites. For 0. 25 V f of the ceramics from 1 MHz to 26 GHz, respectively, relative permittivity and dielectric loss of the composite vary between 6–8 and 0. 02–0. 05, respectively. As the percentage fraction of BaBiLiTeO_6 ceramics increases from 0 to 0. 5 percent, thermal conductivity and diffusivity of the composites increases, while the coefficient of specific heat capacity decreases. Using high-frequency structure simulator software, a microstrip patch antenna that can radiate at 2. 48 GHz with a return loss of 13. 2 dB was created and optimized. Silicon rubber – BaBiLiTeO_6 composites have been shown to be a candidate for adaptable components in microwave communication devices, owing to the physical and chemical characteristics of the material.

Source link: https://doi.org/10.1007/s11664-022-09565-z


Optimized resource allocation for multipath cooperative video transmission over MEC-assisted 5G heterogeneous networks

With the continuously increasing demands for video entertainment, high-quality video transmission will still be one of the major challenges for future Mobile Edge Computing supported 5G heterogeneous networks. On this basis, an improved cache optimization algorithm has been developed to help determine the most MEC severs' appropriate cooperative cache policy. We first develop a low-complexity model for real-time evaluation of the end-to-end delay in order to accurately forecast the final quality result, and then propose an innovative quality prediction system that takes into account deadline constraints. To safely predict the final quality achievement, we first develop a low-complexity model for real-time estimation of the end-to-end delay. Our simulation results show that our strategy outperforms those in the caching optimization process in terms of both hit rate and delay, and moreover, ensures playback integrity while still guaranteeing higher video quality in the transmission optimization stage, according to simulation results.

Source link: https://doi.org/10.1007/s11042-022-12137-2


A Compact Semi-circular Slot MIMO Antenna with Enhanced Isolation for Sub-6 GHz 5G WLAN Applications

In this paper, a new compact semi-circular slot 2 MIMO antenna is demonstrated for 5G NR sub-6 GHz applications with high isolation. The full size of the SCS MIMO antenna is 16 mm x 21 mm, and a FR4 substrate is used with thickness of 1. 6 mm. The two SCS antenna elements are separated by a 1mm border along edge-to-edge distance. Using Ansys HFSS, the proposed compact MIMO antenna configuration can be simulated. A prototype was designed and tested to confirm SCS MIMO antennas. The measured results were obtained at 5. 5 GHz with isolation greater than 25dB, impedance bandwidth covers from 5. 10 GHz to 5. 80 GHz, with return loss of 39. 5 dB. This small MIMO antenna is ideal for 5G communications in sub-6 GHz wifi-band applications.

Source link: https://doi.org/10.1007/s11277-022-09730-x


GBRM: a graph embedding and blockchain-based resource management framework for 5G MEC

However, traditional resource management tools assume only a single operator's inability to deal with profit allocation and privacy protection issues among different operators. We use the Stackelberg game model to solve MEC servers' cache-offloading issue, and Deepwalk graph embedding between MECs ensures the security of various operators' content. Our experiments in the virtual network scenario show that our work results are considerably higher than the RandomSelect and the LocalIndex method in global latency, as well as the global index's desired situation.

Source link: https://doi.org/10.1007/s11227-022-04528-x


Beam-Steerable Ultra-Wide-Band Miniaturized Elliptical Phased Array Antenna Using Inverted-L-Shaped Modified Inset Feed and Defected Ground Structure for 5G Smartphones Millimeter-Wave Applications

Multi Input Multi Input Multi Output Multi Input Multi Input Multi Output Multi Input Multi Output Multi Output Multi Output Multi Input Multi Input Multi Output Multi Input Multi Input Multi Input Multi Output and phased array systems are considered a key component of 5G communication devices. In conclusion, this report is the result of this study's findings: the development of a new mm-wave Ultrawide Band antenna configuration with compact and simple layout suitable for both MIMO and phased array systems. Hence, the produced antenna array has been tested separately as a MIMO antenna and as a phased array antenna to carefully monitor each system's results. The single antenna configuration is an elliptical patch antenna, where the design uniqueness lies in the combination of a modified inset-feed and defected ground structure to provide a wide bandwidth without compromises on the radiation results, nor in antenna size or design simplicity. MIMO and phased array antennas are made up of 12-elements of the single UWB-antenna, which are arranged linearly along the smartphone's width-edge.

Source link: https://doi.org/10.1007/s11277-022-09737-4


A constrained optimization model for the provision of services in a 5G network with multi-level cybersecurity investments

The three layers of the network include the infrastructure layers, which include resources required to create a service, the slices layer, where services are provided for the services layer, which is the top layer of the network and contains services or applications that are not required by users or devices.

Source link: https://doi.org/10.1007/s00500-022-07117-5


Chip-scale Floquet topological insulators for 5G wireless systems

However, research of photonic Floquet topological insulators has been limited to devices that mimic time with a spatial perspective, which preserves time reversal symmetry and obstructs valuable attributes such as non-reciprocal topological security. Despite the wide range, our electronics employ time modulation to operate beyond the delay-bandwidth maximum of traditional linear time-invariant electromagnetic devices, resulting in significant delays. Microwave helicoidally rotating elements can be used to produce chip-scale antenna interfaces for 5G phased-array applications and wideband impulse radar beam generation using quasi-electrostatic helicoidally rotating elements.

Source link: https://doi.org/10.1038/s41928-022-00751-9


5G enhanced mobile broadband multi-criteria scheduler for dense urban scenario

By introducing fifth-generation technologies, mobile communication networks have entered a new age. To satisfy the growing demand for mobile broadband networks, the International Union of Telecommunications recommends new core innovations and capabilities for 5G networks. The requirements for the upgraded Mobile BroadBand use case by 5G appear to be contradictory. This paper describes a multi-criteria scheduler for 5G eMBB radio transmissions in a dense urban environment. The algorithm developed in this paper yields the highest results for the enhanced mobile broadband use case and the scenario adopted, according to a comparative study.

Source link: https://doi.org/10.1007/s11235-022-00885-3


Optimized D-RAN Aware Data Retrieval for 5G Information Centric Networks

Consumers and intelligent devices have been able to securely exchange data with each other thanks to the advancement of wireless networking services. Mobile phone owners regularly exchange popular content, resulting in a significant rise in the mobile traffic. We use an eNB/gNB data retrieval algorithm, as well as a Liveliness and Size based data Replacement algorithm to refine, rank, and cache the data items in this paper. In D-RAN for quick data replacement, data items are chosen based on their reputation and cached. We also included a cost-optimized Radar-Based data Retrieval algorithm that helps to find the data nearness in the neighboring eNBs.

Source link: https://doi.org/10.1007/s11277-021-09392-1

* Please keep in mind that all text is summarized by machine, we do not bear any responsibility, and you should always check original source before taking any actions

* Please keep in mind that all text is summarized by machine, we do not bear any responsibility, and you should always check original source before taking any actions