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SNR-adaptive deep joint source-channel coding scheme for image semantic transmission with convolutional block attention module

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The Journal of China Universities of Posts and Telecommunications 2024年第1期31卷 1-11页

作者： Yang Yujia Liu Yiming Zhang Wenjia Zhang Zhi State Key Laboratory of Networking and Switch Technology Beijing University of Posts and TelecommunicationsBeijing 100876China

With the development of deep learning(DL),joint source-channel coding(JSCC)solutions for end-to-end transmission have gained a lot of *** deep JSCC schemes support dynamically adjusting the rate according to different channel conditions during transmission,enhancing robustness in dynamic wireless ***,most of the existing adaptive JSCC schemes only consider different channel conditions,ignoring the different feature importance in the image processing and *** uniform compression of different features in the image may result in the compromise of critical image details,particularly in low signal-to-noise ratio(SNR)*** address the above issues,in this paper,a dual attention mechanism is introduced and an SNR-adaptive deep JSCC mechanism with a convolutional block attention module(CBAM)is proposed,in which matrix operations are applied to features in spatial and channel dimensions *** proposed solution concatenates the pooling feature with the SNR level and passes it sequentially through the channel attention network and spatial attention network to obtain the importance evaluation *** show that the proposed solution outperforms other baseline schemes in terms of peak SNR(PSNR)and structural similarity(SSIM),particularly in low SNR scenarios or when dealing with complex image content.

关键词： semantic communication joint source-channel coding image transmission

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Lattice Security Analysis Algorithms for the Quadratic Congruence Outsourcing Scheme in IoT

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IEEE Internet of Things Journal 2025年第11期12卷 16587-16594页

作者： Zhang, Ran Bi, Jingguo Li, Lixiang Peng, Haipeng Beijing University of Posts and Telecommunications School of Cyberspace Security Beijing100876 China State Key Laboratory of Cryptology Beijing100878 China Beijing University of Posts and Telecommunications Information Security Center State Key Laboratory of Networking and Switching Technology Beijing100876 China

Designing secure outsourcing schemes enables resource-constrained Internet of Things (IoT) devices to perform highly complex computational tasks. Solving the quadratic congruence problem is one of the core components in the construction of cryptographic algorithms for IoT. Recently, Rangasamy designed an outsourcing scheme for solving quadratic congruence equations. Interestingly, we find that the scheme has the risk of secret information being cracked. We propose two lattice attack algorithms in this article. In the first attack algorithm, we prove that there is a possibility of leaking secret information in the public parameters of the outsourcing scheme. Specifically, by intercepting the parameters transmitted between the client and the server, and combining the ideas from Fermat’s Little Theorem and the Euclidean algorithm, the attacker can obtain multiples of the secret parameter p. Furthermore, after recover the value of p, our attack algorithm is capable of recovering all secret parameters in the quadratic congruence equation. In the second attack algorithm, we note that the authors recommend the randomly chosen value of k to be small in the original outsourcing scheme. However, in this article, we point out that the random value k should not be too small, otherwise, the outsourcing scheme would be wrecked. More precisely, we use the Coppersmith method to provide an approach that can recover all the secret information. Our attack algorithm will succeed once k satisfied |k| © 2014 IEEE.

关键词： Information leakage

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From Earth to Space:A First Deployment of 5G Core Network on Satellite

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China Communications 2023年第4期20卷 315-325页

作者： Ruolin Xing Xiao Ma Ao Zhou Schahram Dustdar Shangguang Wang State Key Laboratory of Networking and Switching Technology Beijing University of Posts and TelecommunicationsBeijing 100876China Distributed Systems Group TU Wien1040 ViennaAustria

Recent developments in the aerospace industry have led to a dramatic reduction in the manufacturing and launch costs of low Earth orbit *** new trend enables the paradigm shift of satelliteterrestrial integrated networks with global *** particular,the integration of 5G communication systems and satellites has the potential to restructure nextgeneration mobile *** leveraging the network function virtualization and network slicing,the satellite 5G core networks will facilitate the coordination and management of network functions in satellite-terrestrial integrated *** are the first to deploy a 5G core network on a real-world satellite to investigate its *** conducted experiments to validate the satellite 5G core network *** validated procedures include registration and session setup *** results show that the satellite 5G core network can function normally and generate correct signaling.

关键词： 5G core network satellite communications satellite Internet

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Optimizing Space-Borne Computation: A Reliability Enhancement Framework for LEO Constellation 29

Optimizing Space-Borne Computation: A Reliability Enhancemen...

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29th IEEE International Conference on Parallel and Distributed Systems, ICPADS 2023

作者： Yang, Lipei Zhou, Ao Ma, Xiao Zhang, Yiran Wang, Shangguang Beijing University of Posts and Telecommunications The State Key Laboratory of Networking and Switching Technology China

ISBN: (纸本)9798350330717

Edge computing is extending the frontier of computation beyond terrestrial boundaries, with Low Earth Orbit (LEO) constellations emerging as the cutting-edge paradigm, aspiring to deliver ubiquitous computing capabilities globally. However, the unresolved service reliability issues within LEO constellations continue to barricade the realization of the vision for space computing. Terrestrial-native classical methods struggle to meet the stringent environmental conditions of space computing and often fail to satisfy the rigorous requirements of LEO constellations for failure response times and computational resource overhead. To address these challenges, we introduce the LEO Service Reliability Enhancement Framework (LSREF). LSREF employs the Variable Speed Replication technology to balance failure response times and computational resource overhead and adopts a decentralized design, more congruent with the characteristics of LEO constellations. Specifically, to counter the immense scale and high dynamism of LEO constellations, LSREF proposes orbital plane-based autonomous domains and leverages the Satellite Autonomous Backup Deployment Algorithm in conjunction with the Registry Polling Mechanism to enable autonomous decision-making for service backup strategies on each satellite. Our simulation experiments demonstrate that, compared to classical methods, LSREF reduces average failure response times by 10.76% and diminishes computational resource consumption by nearly 15.53%. © 2023 IEEE.

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CM-TTS: Enhancing Real Time Text-to-Speech Synthesis Efficiency through Weighted Samplers and Consistency Models

CM-TTS: Enhancing Real Time Text-to-Speech Synthesis Efficie...

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2024 Findings of the Association for Computational Linguistics: NAACL 2024

作者： Li, Xiang Bu, Fan Mehrish, Ambuj Li, Yingting Han, Jiale Cheng, Bo Poria, Soujanya State Key Laboratory of Networking and Switching Technology Beijing University of Posts and Telecommunications China Singapore University of Technology and Design Singapore

ISBN: (纸本)9798891761193

Neural Text-to-Speech (TTS) systems find broad applications in voice assistants, e-learning, and audiobook creation. The pursuit of modern models, like Diffusion Models (DMs), holds promise for achieving high-fidelity, real-time speech synthesis. Yet, the efficiency of multi-step sampling in Diffusion Models presents challenges. Efforts have been made to integrate GANs with DMs, speeding up inference by approximating denoising distributions, but this introduces issues with model convergence due to adversarial training. To overcome this, we introduce CM-TTS, a novel architecture grounded in consistency models (CMs). Drawing inspiration from continuous-time diffusion models, CM-TTS achieves top-quality speech synthesis in fewer steps without adversarial training or pre-trained model dependencies. We further design weighted samplers to incorporate different sampling positions into model training with dynamic probabilities, ensuring unbiased learning throughout the entire training process. We present a real-time mel-spectrogram generation consistency model, validated through comprehensive evaluations. Experimental results underscore CM-TTS's superiority over existing single-step speech synthesis systems, representing a significant advancement in the field. © 2024 Association for Computational Linguistics.

关键词： Efficiency

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Energy-Efficient Resource Allocation Scheme for Integrated Sensing and Communications-Aided Vehicular Networks 23

Energy-Efficient Resource Allocation Scheme for Integrated S...

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23rd IEEE International Conference on Communication technology, ICCT 2023

作者： Liu, Zhuohan Zhang, Jiupeng Liu, Haoran Yan, Shi Beijing University of Posts and Telecommunications The State Key Laboratory of Networking and Switching Technology China

ISBN: (纸本)9798350325959

The future vehicular networks (VNETs) are expected to provide high-quality communication service and high-accuracy sensing capability with low energy consumption. How-ever, the mobility of vehicles could cause serious load imbalance, resulting in low throughput and high energy consumption in VNETs. In this paper, a resource allocation scheme is designed to maximize system energy efficiency, where the integrated sensing and communications (ISAC) technology is used to sense and predict the positions of vehicles. The optimization problem is formulated as a non-convex nonlinear integer programming problem, where the handover cost, resource constrain and wireless sensing error are considered. To solve this NP-hard problem efficiently, the primal problem is decoupled into two sub-problems and an iterative algorithm based on matching theory is proposed. Simulation results demonstrate that the proposed algorithm shows competitive performance compared to other benchmark schemes. © 2023 IEEE.

关键词： Energy efficiency integrated sensing and communications resource allocation vehicular networks

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An Efficient Local Search Algorithm for Traffic Engineering in Segment Routing Networks 24

An Efficient Local Search Algorithm for Traffic Engineering ...

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24th Asia-Pacific Network Operations and Management Symposium, APNOMS 2023

作者： Chen, Jingjing Wang, Ying Wen, Jiachen Zhang, Qianqian Qiu, Xuesong State Key Laboratory of Networking and Switching Technology Beijing University of Posts and Telecommunications China

ISBN: (纸本)9788995004395

Segment Routing (SR) is a flexible and efficient source routing paradigm which allows traffic to be forwarded along any possible path in the network by using different segment identifiers (SIDs). Segment routing has no additional overhead in maintaining routing information at intermediate forwarding nodes, making it highly scalable and widely used in traffic engineering. However, current researches have some shortcomings in terms of network load balancing and completeness of supporting SR characteristics, which limit the optimization performance. In this paper, we designed a heuristic traffic engineering algorithm called SR-ELS, based on the two segments routing model (2-SR). The algorithm supports the adjacency segments and flexible source node traffic splitting strategy. Experimental results show that the algorithm has a near-optimal performance in reducing the maximum link utilization and excellent operational efficiency. Copyright 2023 KICS.

关键词： Learning algorithms

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Service composition in satellite network based on the self-adaption genetic algorithm 2

Service composition in satellite network based on the self-a...

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2022 2nd Conference on High Performance Computing and Communication Engineering, HPCCE 2022

作者： Niu, Tingting Beijing University of Posts and Telecommunications State Key Laboratory of Networking and Switching Technology China

ISBN: (纸本)9781510663374

For the service composition under the multi-resource and multi-service constraints of the satellite network, without considering the problem that service quality and service priority lead to poor quality of service(QoS) and low service priority matching degree, the priority inverse number of service sequence is defined, the approximation is established aiming at the greatest QoS and the smallest priority inverse number of service sequence, and an adaptive genetic algorithm is proposed to solve the model. The algorithm improves the selection mechanism based on elite-reservation and roulette strategy, and designs adaptive crossover and mutation operators. It solves the shortcoming that standard genetic algorithm is easy to fall into local optimum and avoids the loss of optional solution. The simulation results show that the proposed method increases the QoS of service execution by 13.461% and reduces the priority inverse number by 26.77%. It effectively solves the service composition problem with multi-resource and multi-service constraints in satellite network. © 2023 SPIE.

关键词： Quality of service

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Region-Aware Dynamic Filtering Network for 3D Hand Reconstruction 26

Region-Aware Dynamic Filtering Network for 3D Hand Reconstru...

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26th European Conference on Artificial Intelligence, ECAI 2023

作者： Chen, Yuchen Ren, Pengfei Wang, Jingyu Sun, Haifeng Qi, Qi Wang, Jing Liao, Jianxin State Key Laboratory of Networking and Switching Technology Beijing University of Posts and Telecommunications China

ISBN: (纸本)9781643684369

3D hand reconstruction from RGB image has attracted a lot of attention due to its crucial role in human-computer interaction. Nevertheless, it is still challenging to perform 3D hand reconstruction under conditions of hand-object interaction due to severe mutual occlusion. Previous methods usually adopt fixed convolution kernel to extract features. We argue that simply sharing the static filter for all regions is impertinent, given that the occlusion degree varies across different regions, resulting in inconsistent visual representations. To address this issue, we proposed Region-aware Dynamic Filtering Network (RDFNet), which dynamically generates convolution kernels based on the features of different regions, thereby adaptively extracting region-related information. Furthermore, we introduce a dynamic receptive field selection mechanism to determine the most appropriate scale for the convolution kernel. For the severely occluded regions, larger receptive field is needed to capture semantic-related features, while the visible regions are mainly concerned with their own local pattern to accumulate spatial-related features and avoid the interference of irrelevant information. Our proposed RDFNet outperforms state-of-the-art methods by a large margin on several challenging hand-object interaction datasets. © 2023 The Authors.

关键词： Human computer interaction

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An Early Collision Detection Scheme for LEO Satellite Based on Cyclic Shift Offset 9

An Early Collision Detection Scheme for LEO Satellite Based ...

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9th International Conference on Communication and Information Processing, ICCIP 2023

作者： Li, Lihua Chang, Kexin Huang, Jiping Wang, Qiushi State Key Laboratory of Networking and Switching Technology Beijing University of Posts and Telecommunications China

ISBN: (纸本)9798400708909

In order to enhance collision detection efficiency when massive machine-type devices attempt access based on low earth orbiting (LEO) satellite scenario in 6G Non-Terrestrial Networks (NTN), an early collision detection scheme based on cyclic shift offset is proposed. By leveraging the initial cycle shift value as the identification of different preambles, and the same cyclic shift step value to ensure the quantities of cyclic shift indexes of different preambles, the proposed scheme can identify different devices based on cyclic shift offset and has improvement of collision detection probability and load monitoring accuracy and decline of collision detection error probablity, compared with the existing collision detection scheme. © 2023 Copyright held by the owner/author(s)

关键词： Orbits

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