Current Issue : January-March Volume : 2025 Issue Number : 1 Articles : 5 Articles
A social network is a platform that users can share data through the internet. With the ever-increasing intertwining of social networks and daily existence, the accumulation of personal privacy information is steadily mounting. However, the exposure of such data could lead to disastrous consequences. To mitigate this problem, an anonymous group structure algorithm based on community structure is proposed in this article. At first, a privacy protection scheme model is designed, which can be adjusted dynamically according to the network size and user demand. Secondly, based on the community characteristics, the concept of fuzzy subordinate degree is introduced, then three kinds of community structure mining algorithms are designed: the fuzzy subordinate degree-based algorithm, the improved Kernighan-Lin algorithm, and the enhanced label propagation algorithm. At last, according to the level of privacy, different anonymous graph construction algorithms based on community structure are designed. Furthermore, the simulation experiments show that the three methods of community division can divide the network community effectively. They can be utilized at different privacy levels. In addition, the scheme can satisfy the privacy requirement with minor changes....
Massive MIMO deployments have been traditionally based on dedicated links in the front-haul, i.e., between the central processing units and the Access Points (APs). Recently, cell-free massive Multiple-Input Multiple-Output (MIMO) systems based on serial front-haul links have been discussed to simplify the deployments, among other reasons. However, the power consumption models currently used for cell-free massive MIMO deployments typically assume dedicated fronthaul links. This paper highlights the inaccuracy of these models when applied to serial front-hauls and proposes simple adaptations to achieve more realistic results. The results obtained for an exemplary scenario show that the front-haul power would represent 61.73% of the total consumed power with the original models. In contrast, with the proposed adaptations, it could be as low as 1.59% of the total consumed power for some serial front-haul configurations. Additionally, the impact of considering APs with lower power consumption is studied, in which case, the percentages above would become 93.15% and 11.96%, respectively. Hence the importance of having power models that fit the front-haul topology....
Airtime fairness has emerged as a key approach to enhancing wireless throughput performance. However, existing research often overlooks the precise calculation of airtime, particularly in relation to TCP acknowledgments. This paper introduces a novel method, implemented on the access point side, for accurately calculating the airtime of TCP and UDP flows. Building on this, we propose a QoS-based scheduling algorithm designed to improve fairness between upload and download traffic. The effectiveness of the algorithm is validated through...
Network-on-chip (NoC) technology is crucial for integrating multiple embedded computing cores onto a single chip. Consequently, this has led to the development of the wireless network-on-chip (WiNoC) concept, seen as a promising strategy to overcome scalability issues in communication systems within chips for future many-core architectures. This research analyses the impact of wireless transceiver subnet clustering on the hundred-core mesh-structured WiNoC architecture. The study aims to examine the effects of distance-based wireless transceiver placements on the transmission delay, network throughput, and energy consumption within a mesh wireless NoC architecture featuring a hundred cores, under specific routing strategies: X-Y, west-first, negative-first, and north-last. This research investigates the impact of positioning radio subnets at the farthest, farther, nearest, and closest positions within an architecture equipped with four wireless transceivers. The Noxim simulator was utilised to simulate the analysed wireless transceiver placements within the hundred-core mesh-structured WiNoC designs, with the objective of validating the results. The architecture with the wireless transceivers positioned at midway proximity (nearer and further) demonstrated the best performance, as evidenced by the lowest latencies for all evaluated deterministic routing algorithms, according to the simulation outcomes....
In wireless multihop networks, such as wireless sensor networks, link quality (LQ) is one of the most important metrics and is widely used in higher-layer applications such as routing protocols. An accurate LQ prediction may greatly improve the performance of wireless multihop networks. Researchers have proposed a lot of LQ prediction models in recent years. However, due to the dynamic and stochastic nature of wireless transmission, the performance of LQ prediction is limited. In this article, we mainly analyze the influence of stochastic nature of wireless transmission on LQ prediction models and study the limitation of such models. Then, we discuss the benefits in the application of wireless multihop networks with the performance-limited LQ prediction models....
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