Raik-Michael Meinshausen

The 3G4G Blog: 6G and Other 3GPP Logos - https://lnkd.in/eDTJ3qFe #3G4G5G #3GPP #Logos #6G #5G #5GAdvanced #LTE #LTEAdvanced #LTEAdvancedPro #UMTS 

18

🚀 New paper published in the journal #Telecom (IF: 2.1, Citescore: 4.8) 🖋️ Title: Reliable and Resilient #Wireless #Communications in #IoT-Based Smart Agriculture: A Case Study of #Radio Wave Propagation in a Corn Field 🔗 Paper can be viewed and downloaded via the link below: https://buff.ly/4fyvKqz Share with your colleagues, and let's continue driving innovation in telecom together.🙌

4

This paper proposed a new #digital #twin modeling qualifier, #age #of #twin (#AoT), to measure the digital twin data freshness, especially to use in 6G deployments. In AoT formation, the authors consider device density, packet deadlines, link capacity, and buffer size metrics by relating to the three V of big data characteristics; velocity, volume, and variety. Besides, they form an AoT umbrella to cover topology-wise, service-type-wise, and traffic-type-wise digital twin modeling needs. They perform the AoT-based twin modeling for each AoT class and converge to an AoT value. ---- Kübra Duran, Mehmet Özdem, Trang Hoang, Trung Q. Duong, Berk Canberk More details can be found at this link: https://lnkd.in/gQX993Z8

51

1 Kommentar

📣 All articles in #Telecom (ISSN: 2673-4001) Vol 5, Issue 2, are now freely available to access, read and download: https://buff.ly/3xw6NLH 📯 Cover Story: This text proposes a Vivaldi structure array antenna using a power divider structure. The goal is to address the challenges faced by monolithic systems in modern wireless communications. It combines the characteristics of a wide scanning angle and ultra-wide bandwidth with CMOS technology. 🔗 https://buff.ly/44YLK0N

4

#Nonlinear #energy #harvesting models are under discussion for next generation #IoT #networks. However, there are a plethora of #ML-based techniques especially in the #DRL aura which can be used to perform different optimization for various models under consideration. A team of researchers at Information Processing and Transmission Lab investigated which algorithms can be used for what kind of networks for better network performance for IoT based #NOMA networks. The paper has been accepted to #IEEE Communications Letters. Contributors: Ali Asgher M., Wasay Baig, Muhammad Abdullah Sohail, Syed Asad Ullah, Haejoon Jung, Syed Ali Hassan https://lnkd.in/dAvrJRQy

16

2 Kommentare

This paper investigates three challenges that can be faced by allocating one controller per switch in a distributed control scheme: (1) Computational complexity, since the assignment is an NP-hard problem, (2) Resource and energy efficiency, to obtain an assignment with the lowest number of controllers in order to reduce resource and energy consumption, and (3) Dynamicity, where a dynamic approach of assignment is required to adapt to the network’s traffic changes. Then, the authors propose efficient algorithms for static and dynamic scenarios, that even achieve quantitative optimality guarantees in special cases. ----Ehsan Tohidi, @Saeedeh Parsaeefard, Aliakbar Hemmati, @Alberto Leon-Garcia More details can be found at this link: https://lnkd.in/g2wau3k9

3

Standards Development Organizations (#SDOs) play an important role in enabling the success of #OpenRAN by creating frameworks that promote interoperability, innovation, and collaboration across the ecosystem. O-RAN ALLIANCE, in particular, is crucial in ensuring that Open RAN solutions are widely adopted, technically sound, and secure. In our opinion, there are several functions of SDOs that directly contribute to Open RAN's success... Read the full article by Marcin Dryjanski, CEO of Rimedo Labs below: #rimedolabs #oran #oranalliance #sdo

7

This research introduces a pioneering approach that integrates #digital #twin (#DT) technology with an #federated #learning #management #systems (#FLMS), bolstering the network's resilience and safeguarding communication among distributed networks in the #6G #era. At the heart of their methodology is the novel #federated #unlearning #techniques, designed to mitigate the influence of malicious or poisonous clients within an already compromised network. By leveraging the #DTs of #clients, the system can effectively tackle such threats while ensuring the #integrity of the network. Federated learning enables #collaborative #model training across decentralized clients, while DTs provide a virtual representation of physical entities, allowing for accurate monitoring and analysis. The proposed system enhances the #resilience of #networked systems #against #adversarial #attacks, ensuring dependable and secure communication among devices and infrastructure. ----@Wathsara Daluwatta, Shehan Edirimannage， Charitha Elvitigala, @Ibrahim Khalil, Mohammed Atiquzzaman More details can be found at this link: https://lnkd.in/gWqwhwPJ

8

Deploying #reconfigurable #intelligent #surfaces (#RISs) near source and destination is of practical interest for improving the link quality of #vehicle-#to-#vehicle (#V2V) wireless systems. However, the accurate channel modeling and RIS tile deployment constitute a pair of challenges to evaluate the system performance, such as error performance, capacity, etc. In this article, the authors investigate the double-RIS channel characteristics and propose a geometry-based triple-cylinder model, where the RIS subsurface/tile is enabled to assist V2V systems and other elements are turned off. To determine tile locations on RIS surface, they formulate an optimization problem by maximizing the end-to-end channel gain and solve it using #gradient #ascent (#GA) method. Following this, channel correlation function, channel capacity, and outage probability are derived according to the proposed model. Five typical mobile scenarios are discussed to validate the convergence of proposed GA algorithm, where the results show that channel gain can converge to its maximum with optimized tile locations. In addition, channel correlation under different parameters and conditions are explored. ---- Guiqi Sun, Ruisi He, Jiancheng An, Bo Ai, Yaxin Song, Yong Niu, Gongpu Wang, Chau Yuen More details can be found at this link: https://lnkd.in/e-N3zzpq

3

This paper presents a comprehensive survey of #service #selection #strategies in mobile networks, transitioning from traditional approaches to emerging techniques, while also introducing a taxonomy classifying service selection methods based on criteria including mobile devices as service providers, architectural perspectives, computing devices allocation, evaluation metrics, and service selection methods. Additionally, the authors offer insights into the latest #Quality #of #Service (#QoS)-aware and energy-centric service selection methodologies, while addressing challenges related to battery life and energy efficiency, QoS, security and privacy, as well as scalability and resource management. Additionally, they discuss prospective trajectories and future direction. ---- Abdessalem Hadjkouider, Chaker Abdelaziz Kerrache, Ahmed Korichi, Yesin Sahraoui, Carlos Calafate, Sahraoui Dhelim, Dr. Asma Adnane More details can be found at this link: https://lnkd.in/ekP2eH29

7

Is it possible to achieve fully distributed low-voltage grid control without a central instance? Our paper 𝐀 𝐝𝐞𝐜𝐞𝐧𝐭𝐫𝐚𝐥𝐢𝐳𝐞𝐝 𝐨𝐩𝐭𝐢𝐦𝐢𝐳𝐚𝐭𝐢𝐨𝐧 𝐚𝐩𝐩𝐫𝐨𝐚𝐜𝐡 𝐟𝐨𝐫 𝐬𝐜𝐚𝐥𝐚𝐛𝐥𝐞 𝐚𝐠𝐞𝐧𝐭-𝐛𝐚𝐬𝐞𝐝 𝐞𝐧𝐞𝐫𝐠𝐲 𝐝𝐢𝐬𝐩𝐚𝐭𝐜𝐡 𝐚𝐧𝐝 𝐜𝐨𝐧𝐠𝐞𝐬𝐭𝐢𝐨𝐧 𝐦𝐚𝐧𝐚𝐠𝐞𝐦𝐞𝐧𝐭, recently published in 𝘈𝘱𝘱𝘭𝘪𝘦𝘥 𝘌𝘯𝘦𝘳𝘨𝘺, explains how. This paper introduces a fully decentralized approach to energy dispatch and congestion management, leveraging agent-based game theory, the backward-forward sweep method, and the Alternating Direction Method of Multipliers (ADMM). In addition to showcasing energy prices and power flow results, we demonstrated the logarithmic scalability of this decentralized method by simulating low-voltage grid control with up to 119 prosumers.   A special thanks to the main authors Maximilian Kilthau, Vincent Henkel, Lukas Wagner, Felix Gehlhoff, and Alexander Fay for their valuable contributions and patience throughout the publication process. Read the full paper here: https://lnkd.in/eCV7Sfud #EnergyTransition #AgentBasedSystems #DistributedControl

15

Blog post: "#5G Technology and #DataPrivacy Concerns in #Agriculture" The latest 5G technology (network) is enabling #AgriTech companies to have live streaming from cameras installed in farms or onboard #drones ... Continue reading below: https://lnkd.in/eyvj-JhV

3

Power Control in 4G LTE Power control in Uplink helps to improve efficiency by reducing inter‐cell interference and UE power consumption. • When UE is powered up first time, Open‐loop power control is applied for initial transmission here. Power here is controlled based on the path loss difference between transmit power and received power (Reference signal received power – RSRP). Open loop mechanism is faster but not precise and there is no feedback mechanism is used to change the power. UE determines the power changes based on the set algorithm. • After initial setup, with the change in the distance between UE and base station, SINR along with path loss is considered for power control and here comes closed loop power control mechanism in the picture. • Power control of PUSCH is based on open‐loop power control with slow aperiodic closed loop correction factor, it is based on fractional pathloss power control. With fractional pathloss power control, it will be easier to set power control parameters that will enable higher UL peak rate in the cell without sacrificing cell‐edge performance. • Power control of PUCCH is based on SINR as there is no link adaptation and fixed MCS is used over PUCCH. The UE‐received PUCCH SINR will be compared with the target PUCCH SINR and TPC values will be generated based on the difference between the two values. 👉 To understand about 4G LTE in detail, refer to the course at - https://lnkd.in/e7yGMsjR #telecom #technology #learning #platform #4g #5g #itelcotech https://lnkd.in/edc8ATs5

26

1 Kommentar

📶 Why are CSFB and SRVCC used in LTE? CSFB and SRVCC are mechanisms used in mobile telecommunications to manage voice calls when transitioning between LTE (4G) and legacy networks (2G/3G). 🆚 What are the difference between CSFB and SRVCC? 👇 🔷 What is CSFB? CSFB (Circuit Switched Fallback) is a technique used in LTE networks where voice calls are handled by falling back to 2G or 3G networks that support circuit-switched voice (CS) services. 🔹 What is the Purpose of CSFB? It's used to ensure that LTE-capable devices can make and receive voice calls even in areas where LTE coverage is available, but voice services are only supported over legacy 2G/3G networks. 🔹 How does CSFB Operates? When a voice call is initiated on an LTE device, the device temporarily falls back to the 2G or 3G network for the duration of the call. Once the call ends, the device reverts to LTE for data services. 🔶 What is SRVCC? SRVCC is a feature that enables seamless handover of a voice call from LTE (VoLTE) to 2G/3G networks without dropping the call. 🔸 What is the Purpose of SRVCC? SRVCC ensures uninterrupted voice calls when a user moves out of LTE coverage where VoLTE is available, requiring the call to be transferred to a legacy 2G or 3G network. 🔸 How does SRVCC Operates? When a mobile device transitions from LTE to 2G/3G coverage during an active VoLTE call, SRVCC allows the call to be transferred to the circuit-switched network without interruption, maintaining call continuity. ✳ What are the Advantages of using CSFB and SRVCC Techniques? 🔯 Provides a seamless user experience by avoiding call drops during network handovers. 🔯 Optimizes network resources by utilizing LTE for data services and legacy networks for voice calls, ensuring efficient use of spectrum. ✴ Summary Comparison: CSFB is used for LTE devices to access voice services by falling back to 2G/3G networks, primarily when VoLTE is not available or supported. SRVCC ensures continuity of VoLTE calls when transitioning between LTE and legacy networks, allowing calls to seamlessly hand over to circuit-switched networks without interruption. #TelecomIndustry #Mobilecommunication #4G #MobileTechnology

19