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<button class="button is-small is-link">Go</button> </div> </div> </form> </div> </div> <ol class="breathe-horizontal" start="1"> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2412.00741">arXiv:2412.00741</a> <span> [<a href="https://arxiv.org/pdf/2412.00741">pdf</a>, <a href="https://arxiv.org/format/2412.00741">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Networking and Internet Architecture">cs.NI</span> </div> </div> <p class="title is-5 mathjax"> Overview of NR Enhancements for Extended Reality (XR) in 3GPP 5G-Advanced </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/cs?searchtype=author&query=Gapeyenko%2C+M">Margarita Gapeyenko</a>, <a href="/search/cs?searchtype=author&query=Paris%2C+S">Stefano Paris</a>, <a href="/search/cs?searchtype=author&query=Isomaki%2C+M">Markus Isomaki</a>, <a href="/search/cs?searchtype=author&query=Yanakiev%2C+B">Boyan Yanakiev</a>, <a href="/search/cs?searchtype=author&query=Amiri%2C+A">Abolfazl Amiri</a>, <a href="/search/cs?searchtype=author&query=S%C3%A9bire%2C+B">Benoist S茅bire</a>, <a href="/search/cs?searchtype=author&query=Kaikkonen%2C+J">Jorma Kaikkonen</a>, <a href="/search/cs?searchtype=author&query=Wu%2C+C">Chunli Wu</a>, <a href="/search/cs?searchtype=author&query=Pedersen%2C+K+I">Klaus I. Pedersen</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2412.00741v1-abstract-short" style="display: inline;"> Extended reality (XR) is unlocking numerous possibilities and continues attracting individuals and larger groups across different business sectors. With Virtual reality (VR), Augmented reality (AR), or Mixed reality (MR) it is possible to improve the way we access, deliver and exchange information in education, health care, entertainment, and many other aspects of our daily lives. However, to full… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2412.00741v1-abstract-full').style.display = 'inline'; document.getElementById('2412.00741v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2412.00741v1-abstract-full" style="display: none;"> Extended reality (XR) is unlocking numerous possibilities and continues attracting individuals and larger groups across different business sectors. With Virtual reality (VR), Augmented reality (AR), or Mixed reality (MR) it is possible to improve the way we access, deliver and exchange information in education, health care, entertainment, and many other aspects of our daily lives. However, to fully exploit the potential of XR, it is important to provide reliable, fast and secure wireless connectivity to the users of XR and that requires refining existing solutions and tailoring those to support XR services. This article presents a tutorial on 3GPP 5G-Advanced Release 18 XR activities, summarizing physical as well as higher layer enhancements introduced for New Radio considering the specifics of XR. In addition, we also describe enhancements across 5G system architecture that impacted radio access network. Furthermore, the paper provides system-level simulation results for several Release 18 enhancements to show their benefits in terms of XR capacity and power saving gains. Finally, it concludes with an overview of future work in Release 19 that continues developing features to support XR services. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2412.00741v1-abstract-full').style.display = 'none'; document.getElementById('2412.00741v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 1 December, 2024; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> December 2024. </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2311.08969">arXiv:2311.08969</a> <span> [<a href="https://arxiv.org/pdf/2311.08969">pdf</a>, <a href="https://arxiv.org/format/2311.08969">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Networking and Internet Architecture">cs.NI</span> </div> </div> <p class="title is-5 mathjax"> PDU-set Scheduling Algorithm for XR Traffic in Multi-Service 5G-Advanced Networks </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/cs?searchtype=author&query=Paymard%2C+P">Pouria Paymard</a>, <a href="/search/cs?searchtype=author&query=Paris%2C+S">Stefano Paris</a>, <a href="/search/cs?searchtype=author&query=Amiri%2C+A">Abolfazl Amiri</a>, <a href="/search/cs?searchtype=author&query=Kolding%2C+T+E">Troels E. Kolding</a>, <a href="/search/cs?searchtype=author&query=Moya%2C+F+S">Fernando Sanchez Moya</a>, <a href="/search/cs?searchtype=author&query=Pedersen%2C+K+I">Klaus I. Pedersen</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2311.08969v1-abstract-short" style="display: inline;"> In this paper, we investigate a dynamic packet scheduling algorithm designed to enhance the eXtended Reality (XR) capacity of fifth-generation (5G)-Advanced networks with multiple cells, multiple users, and multiple services. The scheduler exploits the newly defined protocol data unit (PDU)-set information for XR traffic flows to enhance its quality-of-service awareness. To evaluate the performanc… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2311.08969v1-abstract-full').style.display = 'inline'; document.getElementById('2311.08969v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2311.08969v1-abstract-full" style="display: none;"> In this paper, we investigate a dynamic packet scheduling algorithm designed to enhance the eXtended Reality (XR) capacity of fifth-generation (5G)-Advanced networks with multiple cells, multiple users, and multiple services. The scheduler exploits the newly defined protocol data unit (PDU)-set information for XR traffic flows to enhance its quality-of-service awareness. To evaluate the performance of the proposed solution, advanced dynamic system-level simulations are conducted. The findings reveal that the proposed scheduler offers a notable improvement in increasing XR capacity up to 45%, while keeping the same enhanced mobile broadband (eMBB) cell throughput as compared to the well-known baseline schedulers. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2311.08969v1-abstract-full').style.display = 'none'; document.getElementById('2311.08969v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 15 November, 2023; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> November 2023. </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2301.08489">arXiv:2301.08489</a> <span> [<a href="https://arxiv.org/pdf/2301.08489">pdf</a>, <a href="https://arxiv.org/format/2301.08489">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Networking and Internet Architecture">cs.NI</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Signal Processing">eess.SP</span> </div> </div> <p class="title is-5 mathjax"> Performance of Joint XR and Best Effort eMBB Traffic in 5G-Advanced Networks </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/cs?searchtype=author&query=Paymard%2C+P">Pouria Paymard</a>, <a href="/search/cs?searchtype=author&query=Amiri%2C+A">Abolfazl Amiri</a>, <a href="/search/cs?searchtype=author&query=Kolding%2C+T+E">Troels E. Kolding</a>, <a href="/search/cs?searchtype=author&query=Pedersen%2C+K+I">Klaus I. Pedersen</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2301.08489v1-abstract-short" style="display: inline;"> In this paper, we address the joint performance of eXtended reality (XR) and best effort enhanced mobile broadband (eMBB) traffic for a 5G-Advanced system. Although XR users require stringent throughput and latency performance, operators do not lose significant additional network capacity when adding XR users to an eMBB dominated network. For instance, adding an XR service at 45 Mbps with 10 ms pa… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2301.08489v1-abstract-full').style.display = 'inline'; document.getElementById('2301.08489v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2301.08489v1-abstract-full" style="display: none;"> In this paper, we address the joint performance of eXtended reality (XR) and best effort enhanced mobile broadband (eMBB) traffic for a 5G-Advanced system. Although XR users require stringent throughput and latency performance, operators do not lose significant additional network capacity when adding XR users to an eMBB dominated network. For instance, adding an XR service at 45 Mbps with 10 ms packet delay budget, yields close to a 45 Mbps drop in eMBB capacity. In an XR only network layer, we show how the capacity in number of supported XR users depends significantly on the rate but also the latency budget. We show also how the XR service capacity is significantly reduced in the mixed service setting as the system goes into full load and other-cell interference becomes significant. The presented results can be used by cellular service providers to assess their networks performance of XR traffic based on their current eMBB performance, or as input to dimensioning to be able to serve certain XR traffic loads. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2301.08489v1-abstract-full').style.display = 'none'; document.getElementById('2301.08489v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 20 January, 2023; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> January 2023. </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2203.02242">arXiv:2203.02242</a> <span> [<a href="https://arxiv.org/pdf/2203.02242">pdf</a>, <a href="https://arxiv.org/format/2203.02242">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Networking and Internet Architecture">cs.NI</span> </div> </div> <p class="title is-5 mathjax"> Standardization of Extended Reality (XR) over 5G and 5G-Advanced 3GPP New Radio </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/cs?searchtype=author&query=Gapeyenko%2C+M">Margarita Gapeyenko</a>, <a href="/search/cs?searchtype=author&query=Petrov%2C+V">Vitaly Petrov</a>, <a href="/search/cs?searchtype=author&query=Paris%2C+S">Stefano Paris</a>, <a href="/search/cs?searchtype=author&query=Marcano%2C+A">Andrea Marcano</a>, <a href="/search/cs?searchtype=author&query=Pedersen%2C+K+I">Klaus I. Pedersen</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2203.02242v3-abstract-short" style="display: inline;"> Extended Reality (XR) is one of the major innovations to be introduced in 5G/5G-Advanced communication systems. A combination of augmented reality, virtual reality, and mixed reality, supplemented by cloud gaming, revisits the way how humans interact with computers, networks, and each other. However, efficient support of XR services imposes new challenges for existing and future wireless networks.… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2203.02242v3-abstract-full').style.display = 'inline'; document.getElementById('2203.02242v3-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2203.02242v3-abstract-full" style="display: none;"> Extended Reality (XR) is one of the major innovations to be introduced in 5G/5G-Advanced communication systems. A combination of augmented reality, virtual reality, and mixed reality, supplemented by cloud gaming, revisits the way how humans interact with computers, networks, and each other. However, efficient support of XR services imposes new challenges for existing and future wireless networks. This article presents a tutorial on integrating support for the XR into the 3GPP New Radio (NR), summarizing a range of activities handled within various 3GPP Service and Systems Aspects (SA) and Radio Access Networks (RAN) groups. The article also delivers a case study evaluating the performance of different XR services in state-of-the-art NR Release 17. The paper concludes with a vision of further enhancements to better support XR in future NR releases and outlines open problems in this area. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2203.02242v3-abstract-full').style.display = 'none'; document.getElementById('2203.02242v3-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 28 May, 2023; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 4 March, 2022; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> March 2022. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">Accepted to IEEE Network, 2023. Copyright 2023 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material, creating new works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works</span> </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2012.05507">arXiv:2012.05507</a> <span> [<a href="https://arxiv.org/pdf/2012.05507">pdf</a>, <a href="https://arxiv.org/format/2012.05507">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Networking and Internet Architecture">cs.NI</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Signal Processing">eess.SP</span> </div> </div> <p class="title is-5 mathjax"> Analysis of Outage Latency and Throughput Performance in Industrial Factory 5G TDD Deployments </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/cs?searchtype=author&query=Esswie%2C+A+A">Ali A. Esswie</a>, <a href="/search/cs?searchtype=author&query=Pedersen%2C+K+I">Klaus I. Pedersen</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2012.05507v1-abstract-short" style="display: inline;"> The fifth generation (5G) new radio supports a diversity of network deployments. The industrial factory (InF) wireless automation use cases are emerging and drawing an increasing attention of the 5G new radio standardization groups. Therefore, in this paper, we propose a service-aware time division duplexing (TDD) frame selection framework for multi-traffic deployments. We evaluate the performance… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2012.05507v1-abstract-full').style.display = 'inline'; document.getElementById('2012.05507v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2012.05507v1-abstract-full" style="display: none;"> The fifth generation (5G) new radio supports a diversity of network deployments. The industrial factory (InF) wireless automation use cases are emerging and drawing an increasing attention of the 5G new radio standardization groups. Therefore, in this paper, we propose a service-aware time division duplexing (TDD) frame selection framework for multi-traffic deployments. We evaluate the performance of the InF network deployments with the state-of-the-art 3GPP modeling assumptions. In particular, we consider the dynamic TDD mode along with optimized uplink power control settings. Multi-traffic coexistence scenarios are also incorporated such that quality of service (QoS) aware dynamic user scheduling and TDD link selection are introduced. Extensive system level simulations are performed in order to evaluate the performance of the proposed solutions, where the proposed QoS-aware scheme shows 68% URLLC outage latency reduction compared to the QoS-unaware solutions. Finally, the paper offers insightful conclusions and design recommendations on the TDD radio frame selection, uplink power control settings and the best QoS-coexistence practices, in order to achieve a decent URLLC outage latency performance in the state-of-the-art InF deployments. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2012.05507v1-abstract-full').style.display = 'none'; document.getElementById('2012.05507v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 10 December, 2020; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> December 2020. </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1904.07963">arXiv:1904.07963</a> <span> [<a href="https://arxiv.org/pdf/1904.07963">pdf</a>, <a href="https://arxiv.org/format/1904.07963">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Networking and Internet Architecture">cs.NI</span> </div> </div> <p class="title is-5 mathjax"> On the Resource Utilization of Multi-Connectivity Transmission for URLLC Services in 5G New Radio </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/cs?searchtype=author&query=Mahmood%2C+N+H">Nurul Huda Mahmood</a>, <a href="/search/cs?searchtype=author&query=Karimi%2C+A">Ali Karimi</a>, <a href="/search/cs?searchtype=author&query=Berardinelli%2C+G">Gilberto Berardinelli</a>, <a href="/search/cs?searchtype=author&query=Pedersen%2C+K+I">Klaus I. Pedersen</a>, <a href="/search/cs?searchtype=author&query=Laselva%2C+D">Daniela Laselva</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="1904.07963v1-abstract-short" style="display: inline;"> Multi-connectivity with packet duplication, where the same data packet is duplicated and transmitted from multiple transmitters, is proposed in 5G New Radio as a reliability enhancement feature. This paper presents an analytical study of the outage probability enhancement with multi-connectivity, and analyses its cost in terms of resource usage. The performance analysis is further compared against… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1904.07963v1-abstract-full').style.display = 'inline'; document.getElementById('1904.07963v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1904.07963v1-abstract-full" style="display: none;"> Multi-connectivity with packet duplication, where the same data packet is duplicated and transmitted from multiple transmitters, is proposed in 5G New Radio as a reliability enhancement feature. This paper presents an analytical study of the outage probability enhancement with multi-connectivity, and analyses its cost in terms of resource usage. The performance analysis is further compared against conventional single-connectivity transmission. Our analysis shows that, for transmission with a given block error rate target, multi-connectivity results in more than an order of magnitude outage probability improvement over the baseline single-connectivity scheme. However, such gains are achieved at the cost of almost doubling the amount of radio resources used. Multi-connectivity should thus be selectively used such that its benefits can be harnessed for critical users, while the price to pay in terms of resource utilization is simultaneously minimized. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1904.07963v1-abstract-full').style.display = 'none'; document.getElementById('1904.07963v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 13 March, 2019; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> April 2019. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">Six pages, five figures, accepted for publication in the Proceedings of IEEE WCNC 2019 Workshops</span> </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1806.04588">arXiv:1806.04588</a> <span> [<a href="https://arxiv.org/pdf/1806.04588">pdf</a>, <a href="https://arxiv.org/format/1806.04588">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Signal Processing">eess.SP</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Networking and Internet Architecture">cs.NI</span> </div> </div> <p class="title is-5 mathjax"> Multi-User Preemptive Scheduling for Critical Low Latency Communications in 5G Networks </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/cs?searchtype=author&query=Esswie%2C+A+A">Ali A. Esswie</a>, <a href="/search/cs?searchtype=author&query=Pedersen%2C+K+I">Klaus I. Pedersen</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="1806.04588v1-abstract-short" style="display: inline;"> 5G new radio is envisioned to support three major service classes: enhanced mobile broadband (eMBB), ultra-reliable low-latency communications (URLLC), and massive machine type communications. Emerging URLLC services require up to one millisecond of communication latency with 99.999% success probability. Though, there is a fundamental trade-off between system spectral efficiency (SE) and achievabl… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1806.04588v1-abstract-full').style.display = 'inline'; document.getElementById('1806.04588v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1806.04588v1-abstract-full" style="display: none;"> 5G new radio is envisioned to support three major service classes: enhanced mobile broadband (eMBB), ultra-reliable low-latency communications (URLLC), and massive machine type communications. Emerging URLLC services require up to one millisecond of communication latency with 99.999% success probability. Though, there is a fundamental trade-off between system spectral efficiency (SE) and achievable latency. This calls for novel scheduling protocols which cross-optimize system performance on user-centric; instead of network-centric basis. In this paper, we develop a joint multi-user preemptive scheduling strategy to simultaneously cross-optimize system SE and URLLC latency. At each scheduling opportunity, available URLLC traffic is always given higher priority. When sporadic URLLC traffic appears during a transmission time interval (TTI), proposed scheduler seeks for fitting the URLLC-eMBB traffic in a multi-user transmission. If the available spatial degrees of freedom are limited within a TTI, the URLLC traffic instantly overwrites part of the ongoing eMBB transmissions to satisfy the URLLC latency requirements, at the expense of minimal eMBB throughput loss. Extensive dynamic system level simulations show that proposed scheduler provides significant performance gain in terms of eMBB SE and URLLC latency. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1806.04588v1-abstract-full').style.display = 'none'; document.getElementById('1806.04588v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 10 June, 2018; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> June 2018. </p> </li> </ol> <div class="is-hidden-tablet">  <span class="help" style="display: inline-block;"><a href="https://github.com/arXiv/arxiv-search/releases">Search v0.5.6 released 2020-02-24</a>  </span> </div> </div> </main> <footer> <div class="columns is-desktop" role="navigation" aria-label="Secondary">  <div class="column"> <div class="columns"> <div class="column"> <ul class="nav-spaced"> 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