paper_authors: Yanshi Sun, Yanglin Ye, Zhiguo Ding, Momiao Zhou, Lei Liu for: 这种研究旨在应用 cognitive radio 引导的非对称访问技术来降低 uplink 传输中的年龄信息 (AoI)。methods: 这种研究使用了时分多access (TDMA) 的传统网络作为研究对象，每个用户都被分配了一个专用的时间槽来传输其状态更新信息。 研究采用了 cognitive radio 技术，让每个用户在其他用户的时间槽中发送信息，从而提高发送机会数。 研究人员还开发了一个精确的分析框架，以确定 CR-NOMA 和无重传的 AoI 表达式，并考虑了状态更新生成过程中的随机性。results: 研究结果表明，通过应用 CR-NOMA，AoI 可以显著降低，特别是当状态到达率低时。 此外，使用重传也能够减少 AoI，特别是当状态到达率低时。Abstract
This paper studies the application of cognitive radio inspired non-orthogonal multiple access (CR-NOMA) to reduce age of information (AoI) for uplink transmission. In particular, a time division multiple access (TDMA) based legacy network is considered, where each user is allocated with a dedicated time slot to transmit its status update information. The CR-NOMA is implemented as an add-on to the TDMA legacy network, which enables each user to have more opportunities to transmit by sharing other user's time slots. A rigorous analytical framework is developed to obtain the expressions for AoIs achieved by CR-NOMA with and without re-transmission, by taking the randomness of the status update generating process into consideration. Numerical results are presented to verify the accuracy of the developed analysis. It is shown that the AoI can be significantly reduced by applying CR-NOMA compared to TDMA. Moreover, the use of re-transmission is helpful to reduce AoI, especially when the status arrival rate is low.
摘要
To analyze the performance of CR-NOMA, a rigorous analytical framework is developed, taking into account the randomness of the status update generating process. The expressions for AoIs achieved by CR-NOMA with and without re-transmission are derived, and numerical results are presented to verify the accuracy of the analysis.The results show that CR-NOMA can significantly reduce AoI compared to TDMA, and the use of re-transmission is particularly beneficial when the status arrival rate is low. This suggests that CR-NOMA can be an effective technique for improving the efficiency of uplink transmission in legacy networks.
paper_authors: Gilles Callebaut, Michiel Sandra, Christian Nelson, Thomas Wilding, Daan Delabie, Benjamin J. B. Deutschmann, William Tärneberg, Emma Fitzgerald, Anders J. Johansson, Liesbet Van der Perre
results: DSS可以提高研究者们对数据的访问和 reuse，满足FAIR原则（找到、访问、交换、重用），并且不限于RF数据存储。Abstract
The emergence of sixth-generation (6G) networks has spurred the development of novel testbeds, including sub-THz networks, cell-free systems, and 6G simulators. To maximize the benefits of these systems, it is crucial to make the generated data publicly available and easily reusable by others. Although data sharing has become a common practice, a lack of standardization hinders data accessibility and interoperability. In this study, we propose the Dataset Storage Standard (DSS) to address these challenges by facilitating data exchange and enabling convenient processing script creation in a testbed-agnostic manner. DSS supports both experimental and simulated data, allowing researchers to employ the same processing scripts and tools across different datasets. Unlike existing standardization efforts such as SigMF and NI RF Data Recording API, DSS provides a broader scope by accommodating a common definition file for testbeds and is not limited to RF data storage. The dataset format utilizes a hierarchical structure, with a tensor representation for specific experiment scenarios. In summary, DSS offers a comprehensive and flexible framework for enhancing the FAIR principles (Findability, Accessibility, Interoperability, and Reusability) in 6G testbeds, promoting open and efficient data sharing in the research community.
摘要
“六代网络（6G）的出现促进了新的测试平台的发展，包括Sub-THz网络、无终端系统和6G模拟器。为了最大化这些系统的利器，它是非常重要的让生成的数据公开可用，并且可以轻松地重用其他人。虽然数据分享已经成为常见的做法，但是数据访问和兼容性受到标准化的限制。在这项研究中，我们提议使用数据存储标准（DSS）来解决这些挑战，使得数据交换和处理脚本的创建变得更加简单和通用。DSS支持实验和模拟数据，允许研究人员使用相同的处理脚本和工具来处理不同的数据集。与现有的标准化尝试如SigMF和NI RF数据记录API不同，DSS具有更广泛的范围，可以涵盖各种测试平台的公定定义文件。数据格式采用层次结构，使用tensor表示法来描述特定的实验场景。总之，DSS提供了一个全面和灵活的框架，以便在6G测试平台中提高FAIR原则（找到、访问、兼容性和重用），推动开放和高效的数据分享在研究 сообществе。”
Exploiting Hybrid Terrestrial/LEO Satellite Systems for Rural Connectivity
results: 经过Monte Carlo仿真 validate the accuracy of the derived expressions, the obtained results show that the satellite constellation size, terrestrial base station density, and MIMO configuration parameters all have a significant impact on the performance of hybrid networks in providing rural connectivity.Abstract
Satellite networks are playing an important role in realizing global seamless connectivity in beyond 5G and 6G wireless networks. In this paper, we develop a comprehensive analytical framework to assess the performance of hybrid terrestrial/satellite networks in providing rural connectivity. We assume that the terrestrial base stations are equipped with multiple-input-multiple-output (MIMO) technologies and that the user has the option to associate with a base station or a satellite to be served. Using tools from stochastic geometry, we derive tractable expressions for the coverage probability and average data rate and prove the accuracy of the derived expressions through Monte Carlo simulations. The obtained results capture the impact of the satellite constellation size, the terrestrial base station density, and the MIMO configuration parameters.
摘要
卫星网络在超5G和6G无线网络中实现全球无缝连接具有重要作用。本文，我们开发了一个完整的分析框架，以评估卫星/地面网络在偏远地区connectivity提供的性能。我们假设地面基站装备了多输入多出力（MIMO）技术，用户可以选择与基站或卫星连接。使用Stochastic Geometry工具，我们 derivates tractable表达式，表示覆盖率和平均数据速率，并通过Monte Carlo仿真实验 validate the accuracy of the derived expressions。获得的结果反映了卫星星座大小、地面基站密度和MIMO配置参数的影响。
Pilot-Based Key Distribution and Encryption for Secure Coherent Passive Optical Networks
paper_authors: Haide Wang, Ji Zhou, Qingxin Lu, Jianrui Zeng, Yongqing Liao, Weiping Liu, Changyuan Yu, Zhaohui Li for: 提高了物理层安全性，增强了光学网络的安全性。methods: 使用 Advanced Encryption Standard（AES）算法和四级振荡形式（GCS-PAM4）的导航干扰器基础设定密钥分布。results: 实验结果表明，使用GCS-PAM4导航干扰器可以实现无错误的上行传输，并且防止下行传输中的侦测。此外，使用GCS-PAM4导航干扰器对CPR的影响相对较小。Abstract
The security issues of passive optical networks (PONs) have always been a concern due to broadcast transmission. Physical-layer security enhancement for the coherent PON should be as significant as improving transmission performance. In this paper, we propose the advanced encryption standard (AES) algorithm and geometric constellation shaping four-level pulse amplitude modulation (GCS-PAM4) pilot-based key distribution for secure coherent PON. The first bit of the GCS-PAM4 pilot is used for the hardware-efficient carrier phase recovery (CPR), while the second bit is utilized for key distribution without occupying the additional overhead. The key bits are encoded by the polar code to ensure error-free distribution. Frequent key updates are permitted for every codeword to improve the security of coherent PON. The experimental results of the 200-Gbps secure coherent PON using digital subcarrier multiplexing show that the GCS-PAM4 pilot-based key distribution could be error-free at upstream transmission without occupying the additional overhead and the eavesdropping would be prevented by AES algorithm at downstream transmission. Moreover, there is almost no performance penalty on the CPR using the GCS-PAM4 pilot compared to the binary phase shift keying pilot.
摘要
PASSIVE OPTICAL NETWORKS (PONs) 的安全问题一直以来都是一大问题，因为它们使用广播传输。为了提高干扰性的 Physical-layer 安全性，在本文中我们提出了高级加密标准 (AES) 算法和四个水平杂化干扰 (GCS-PAM4) 导航器基于钥匙分布。GCS-PAM4 导航器的第一个比特用于硬件高效的 carriers 逻辑征 recovery (CPR)，而第二个比特用于钥匙分布，不占用额外开销。钥匙位数用波尔代码确保错误自动分配。在每个代码字符串中允许频繁更新钥匙，以提高干扰性的 PON 安全性。实验结果表明，使用数字子帧多路分 multiplexing 的 200 Gbps 安全干扰 PON 中 GCS-PAM4 导航器基于钥匙分布可以在上行传输中实现无错误，并且在下行传输中防止侦测。此外，使用 GCS-PAM4 导航器与使用 binary phase shift keying 导航器相比，CPR 的性能几乎无损。