Acesso aberto
Acesso está concedido
Somente assinantes
Volume 61, Nº 3 (2025)
Communication Network Theory
OVERVIEW OF Wi-Fi 8 TECHNOLOGY: NEW OPPORTUNITIES AND OPEN CHALLENGES
Resumo
The Wi-Fi 8 IEEE 802.11bn standard, currently under development, represents the next stage in the evolution of wireless technologies. Unlike previous generations, which focused primarily on increasing peak throughput, the main goal of Wi-Fi 8 is to provide ultra-reliable connectivity and predictable wireless network performance. This is driven by the requirements of new use cases, such as the industrial internet, support for augmented and virtual reality applications, artificial intelligence, and the deployment of dense public networks. Key performance indicators include increased throughput in low signal-to-noise ratio conditions, reduced 95th percentile latency, reduced packet loss, and optimized power consumption. To achieve these goals, new methods are being introduced into the standard, including subcarrier-distributed resource blocks, the use of different modulation and coding structures in different spatial streams, improved channel access methods, seamless roaming, and coordinated management of multiple access points. The article presents the current status of the Wi-Fi 8 standard development, analyzes its performance targets, and discusses relevant technical solutions. It also formulates promising areas of research that require the development of new algorithms and methods for optimizing the use of radio resources to fully realize the potential of the technology. The article will be useful for researchers engaged in mathematical modeling and solving optimization problems in the field of wireless networks. The new Wi-Fi 8 mechanisms described create fundamentally new optimization problems and require the development of appropriate algorithms for radio resource management, transmission planning, and device coordination. The materials in the article will help formulate new optimization models and define objective functions for creating effective algorithms that take into account the specifics of the new standard.
Problems of Information Transmission. 2025;61(3):3-48
3-48
RANDOMIZED SPLITTING ALGORITHM FOR CENTRALIZED RANDOM MULTIPLE ACCESS SYSTEMS
Resumo
Modern communication systems widely use random multiple access (RMA) algorithms based on the ideas of the ALOHA algorithm. An alternative to this approach is to use ideas based on the splitting algorithm, which has a throughput of 0.4877 messages per unit of time, the highest throughput among all known RMA algorithms. The main problem in implementing this algorithm in practice is the need for precise time synchronization of all devices. This paper proposes an RMA algorithm based on the splitting algorithm that is free of this drawback, allowing it to be used in practice in centralized systems.
Problems of Information Transmission. 2025;61(3):49-57
49-57
ANALYTICAL MODEL OF A HYBRID RADIO RESOURCE ALLOCATION SCHEME FOR SERVING REMOTE CONTROL TRAFFIC IN 5G V2X NETWORKS
Resumo
We consider a scenario of data transmission in the uplink channel in a 5G Vehicle-to-Everything (V2X) network with remote vehicle control. The key features of this type of traffic are the variable size of generated packets and strict restrictions on packet delivery time. To serve the traffic of different users, the base station uses a hybrid radio resource allocation scheme: each user is assigned both a dedicated subchannel and a shared subchannel, which is used when there are insufficient resources in the dedicated channel to transmit a packet. We construct an analytical model of data transmission in the uplink channel using this scheme, which allows us to estimate the probability of packet loss for each user at given scheme parameters. We show how to use the analytical model to select the optimal parameters of the hybrid scheme that maximize network capacity.
Problems of Information Transmission. 2025;61(3):58-74
58-74
Image Processing
ON BIPOLAR COORDINATES AND THEIR APPLICATION TO GEOMETRIC PATTERN RECOGNITION PROBLEMS
Resumo
An approach to the geometric pattern recognition problem based on introducing a coordinate system modeling binocular vision, allows us to introduce the concept of a flat observable curve, describe the set of observable curves in the form of a criterion, prove the precompactness of this set with respect to the Hausdorff metric, and thus establish the existence of a finite epsilon-net in this set.
Problems of Information Transmission. 2025;61(3):75-81
75-81