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Contention-based Grant-free Transmission with Independent Multi-pilot Scheme [article]

Zhifeng Yuan, Weimin Li, Zhigang Li, Yuzhou Hu, Yihua Ma
<span title="2020-04-07">2020</span> <i > arXiv </i> &nbsp; <span class="release-stage" >pre-print</span>
Contention-based grant-free transmission is very promising for future massive machine-type communication (mMTC). In contention-based transmission, the random pilot collision is a challenging problem.  ...  In this paper, an independent multi-pilot scheme is proposed, which utilizes the diversity of multiple pilots and is not limited by the spatial correlation.  ...  has a strong impact on the performance of contention-based grant-free transmission.  ... 
<span class="external-identifiers"> <a target="_blank" rel="external noopener" href="https://arxiv.org/abs/2004.03225v1">arXiv:2004.03225v1</a> <a target="_blank" rel="external noopener" href="https://fatcat.wiki/release/vdvgmxuoindfln4uxcbe3rje4e">fatcat:vdvgmxuoindfln4uxcbe3rje4e</a> </span>
<a target="_blank" rel="noopener" href="https://web.archive.org/web/20200409221354/https://arxiv.org/ftp/arxiv/papers/2004/2004.03225.pdf" title="fulltext PDF download" data-goatcounter-click="serp-fulltext" data-goatcounter-title="serp-fulltext"> <button class="ui simple right pointing dropdown compact black labeled icon button serp-button"> <i class="icon ia-icon"></i> Web Archive [PDF] </button> </a> <a target="_blank" rel="external noopener" href="https://arxiv.org/abs/2004.03225v1" title="arxiv.org access"> <button class="ui compact blue labeled icon button serp-button"> <i class="file alternate outline icon"></i> arxiv.org </button> </a>

Contention-based Grant-free Transmission with Extremely Sparse Orthogonal Pilot Scheme [article]

Zhifeng Yuan, Zhigang Li, Weimin Li, Yihua Ma
<span title="2021-06-08">2021</span> <i > arXiv </i> &nbsp; <span class="release-stage" >pre-print</span>
Due to the limited number of traditional orthogonal pilots, pilot collision will severely degrade the performance of contention-based grant-free transmission.  ...  To alleviate the pilot collision and exploit the spatial degree of freedom as much as possible, an extremely sparse orthogonal pilot scheme is proposed for uplink grant-free transmission.  ...  However, as there is no scheduling of the transmission resource by the base station (BS), the grant-free transmission is contention-based.  ... 
<span class="external-identifiers"> <a target="_blank" rel="external noopener" href="https://arxiv.org/abs/2106.04172v1">arXiv:2106.04172v1</a> <a target="_blank" rel="external noopener" href="https://fatcat.wiki/release/p6rj6j3adbb7tmdr3vfnt7tefm">fatcat:p6rj6j3adbb7tmdr3vfnt7tefm</a> </span>
<a target="_blank" rel="noopener" href="https://web.archive.org/web/20210610034059/https://arxiv.org/ftp/arxiv/papers/2106/2106.04172.pdf" title="fulltext PDF download" data-goatcounter-click="serp-fulltext" data-goatcounter-title="serp-fulltext"> <button class="ui simple right pointing dropdown compact black labeled icon button serp-button"> <i class="icon ia-icon"></i> Web Archive [PDF] <div class="menu fulltext-thumbnail"> <img src="https://blobs.fatcat.wiki/thumbnail/pdf/08/ed/08edeae40fc65159a8785e84c2492c4c49aee50d.180px.jpg" alt="fulltext thumbnail" loading="lazy"> </div> </button> </a> <a target="_blank" rel="external noopener" href="https://arxiv.org/abs/2106.04172v1" title="arxiv.org access"> <button class="ui compact blue labeled icon button serp-button"> <i class="file alternate outline icon"></i> arxiv.org </button> </a>

Grant-free Non-orthogonal Multiple Access for IoT: A Survey [article]

Muhammad Basit Shahab, Rana Abbas, Mahyar Shirvanimoghaddam, Sarah J. Johnson
<span title="2019-10-15">2019</span> <i > arXiv </i> &nbsp; <span class="release-stage" >pre-print</span>
The existing literature on NOMA schemes majorly considers centralized scheduling based HTC, where users are already connected, and various system parameters like spreading sequences, interleaving patterns  ...  To tackle this, grant-free access is needed, where mMTC devices can autonomously transmit their data over randomly chosen radio resources.  ...  III and IV can also be customized to support grant-free communication. 3) Other signature based grant-free NOMA schemes: Some other grant-free transmission schemes motivated by signature based NOMA are  ... 
<span class="external-identifiers"> <a target="_blank" rel="external noopener" href="https://arxiv.org/abs/1910.06529v1">arXiv:1910.06529v1</a> <a target="_blank" rel="external noopener" href="https://fatcat.wiki/release/6ouywssbwjhm3nt5iz6px7h7oa">fatcat:6ouywssbwjhm3nt5iz6px7h7oa</a> </span>
<a target="_blank" rel="noopener" href="https://web.archive.org/web/20200823035523/https://arxiv.org/pdf/1910.06529v1.pdf" title="fulltext PDF download" data-goatcounter-click="serp-fulltext" data-goatcounter-title="serp-fulltext"> <button class="ui simple right pointing dropdown compact black labeled icon button serp-button"> <i class="icon ia-icon"></i> Web Archive [PDF] <div class="menu fulltext-thumbnail"> <img src="https://blobs.fatcat.wiki/thumbnail/pdf/d6/63/d6633352ec0f26be16a9694a5438bcc80d4a2372.180px.jpg" alt="fulltext thumbnail" loading="lazy"> </div> </button> </a> <a target="_blank" rel="external noopener" href="https://arxiv.org/abs/1910.06529v1" title="arxiv.org access"> <button class="ui compact blue labeled icon button serp-button"> <i class="file alternate outline icon"></i> arxiv.org </button> </a>

Grant-Free Non-Orthogonal Multiple Access: A Key Enabler for 6G-IoT [article]

Rana Abbas, Tao Huang, Basit Shahab, Mahyar Shirvanimoghaddam, Yonghui Li, Branka Vucetic
<span title="2020-03-23">2020</span> <i > arXiv </i> &nbsp; <span class="release-stage" >pre-print</span>
In this paper, we show that grant-free access combined with non-orthogonal transmission schemes is a promising solution for 6G Internet of Things (IoT).  ...  We also discuss resource allocation issues to enable the co-existence of GF-NOMA with other orthogonal or even grant-based schemes.  ...  In terms of latency, the grant-based access procedure in LTE-A takes around 5-8 ms, in the best-case scenario, excluding the time required for data transmission and assuming error-free and collision-free  ... 
<span class="external-identifiers"> <a target="_blank" rel="external noopener" href="https://arxiv.org/abs/2003.10257v1">arXiv:2003.10257v1</a> <a target="_blank" rel="external noopener" href="https://fatcat.wiki/release/owtfsqzvsjgqfacacriw5z24uu">fatcat:owtfsqzvsjgqfacacriw5z24uu</a> </span>
<a target="_blank" rel="noopener" href="https://web.archive.org/web/20200326072622/https://arxiv.org/ftp/arxiv/papers/2003/2003.10257.pdf" title="fulltext PDF download" data-goatcounter-click="serp-fulltext" data-goatcounter-title="serp-fulltext"> <button class="ui simple right pointing dropdown compact black labeled icon button serp-button"> <i class="icon ia-icon"></i> Web Archive [PDF] </button> </a> <a target="_blank" rel="external noopener" href="https://arxiv.org/abs/2003.10257v1" title="arxiv.org access"> <button class="ui compact blue labeled icon button serp-button"> <i class="file alternate outline icon"></i> arxiv.org </button> </a>

Towards the Standardization of Non-orthogonal Multiple Access for Next Generation Wireless Networks [article]

Yan Chen, Alireza Bayesteh, Yiqun Wu, Bin Ren, Shaoli Kang, Shaohui Sun, Qi Xiong, Chen Qian, Bin Yu, Zhiguo Ding, Sen Wang, Shuangfeng Han, Xiaolin Hou (+3 others)
<span title="2018-02-12">2018</span> <i > arXiv </i> &nbsp; <span class="release-stage" >pre-print</span>
This article will provide a systematic overview of the state-of-the-art design of the NoMA transmission based on a unified transceiver design framework, the related standardization progress, and some promising  ...  use cases in future cellular networks, based on which the interested researchers can get a quick start in this area.  ...  In this case, NoMA based grant-free transmission will show its advantage as a solution for contention resolution with high reliability, since they are designed with high overloading capability.  ... 
<span class="external-identifiers"> <a target="_blank" rel="external noopener" href="https://arxiv.org/abs/1802.03880v1">arXiv:1802.03880v1</a> <a target="_blank" rel="external noopener" href="https://fatcat.wiki/release/lme7vdtjzjdwfgyanqonbpxleq">fatcat:lme7vdtjzjdwfgyanqonbpxleq</a> </span>
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Sparse Signal Processing for Grant-Free Massive Connectivity: A Future Paradigm for Random Access Protocols in the Internet of Things

Liang Liu, Erik G. Larsson, Wei Yu, Petar Popovski, Cedomir Stefanovic, Elisabeth de Carvalho
<span title="">2018</span> <i title="Institute of Electrical and Electronics Engineers (IEEE)"> <a target="_blank" rel="noopener" href="https://fatcat.wiki/container/txj4mzfpbne4hhwgo2ku5cycbq" style="color: black;">IEEE Signal Processing Magazine</a> </i> &nbsp;
(unknown) subset of devices are active at any given instant, thus one of the key challenges for providing massive IoT connectivity is to detect the active devices first and then to decode their data with  ...  multiple-output (MIMO) is especially well-suited for massive IoT connectivity in the sense that the device detection error can be driven to zero asymptotically in the limit as the number of antennas at the base  ...  Specifically, in contrast to the random access scheme in which pilot sequences are randomly selected at each time slot, each device under the grant-free access scheme is pre-assigned with a unique pilot  ... 
<span class="external-identifiers"> <a target="_blank" rel="external noopener noreferrer" href="https://doi.org/10.1109/msp.2018.2844952">doi:10.1109/msp.2018.2844952</a> <a target="_blank" rel="external noopener" href="https://fatcat.wiki/release/74lj3fosrrfibao6rruslqrhtm">fatcat:74lj3fosrrfibao6rruslqrhtm</a> </span>
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Reed-Muller Sequences for 5G Grant-free Massive Access [article]

Huazi Zhang, Rong Li, Jun Wang, Yan Chen, Zhaoyang Zhang
<span title="2018-01-16">2018</span> <i > arXiv </i> &nbsp; <span class="release-stage" >pre-print</span>
We propose to use second order Reed-Muller (RM) sequence for user identification in 5G grant-free access.  ...  These two features are essential to meet the massive connectivity (10^7 links/km^2), ultra-reliable and low-latency requirements in 5G, e.g., one-shot transmission (≤ 1ms) with ≤ 10^-4 packet error rate  ...  In order to support low latency, the basic radio resource for grant-free transmission is a contention transmission unit (CTU), defined as a combination of time, frequency and pilot sequence.  ... 
<span class="external-identifiers"> <a target="_blank" rel="external noopener" href="https://arxiv.org/abs/1801.05089v1">arXiv:1801.05089v1</a> <a target="_blank" rel="external noopener" href="https://fatcat.wiki/release/ikw5oez4lzeolcanvhynfca4ji">fatcat:ikw5oez4lzeolcanvhynfca4ji</a> </span>
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Massive MIMO for Internet of Things (IoT) Connectivity [article]

Alexandru-Sabin Bana, Elisabeth de Carvalho, Beatriz Soret, Taufik Abrão, José Carlos Marinello, Erik G. Larsson, Petar Popovski
<span title="2019-05-15">2019</span> <i > arXiv </i> &nbsp; <span class="release-stage" >pre-print</span>
The main conclusion is that massive MIMO can bring benefits to the scenarios with IoT connectivity, but it requires tight integration of the physical-layer techniques with the protocol design.  ...  We provide insights into the trade-offs that emerge when massive MIMO is applied to mMTC or URLLC and present a number of suitable communication schemes.  ...  Pilot sequences Grant mode Device ID SUCRe Orthogonal Grant-based yes pilot RA Orthogonal Grant-free yes coded RA Orthogonal Grant-free yes CS-RA Pseudo-random Grant-free yes Unsourced  ... 
<span class="external-identifiers"> <a target="_blank" rel="external noopener" href="https://arxiv.org/abs/1905.06205v1">arXiv:1905.06205v1</a> <a target="_blank" rel="external noopener" href="https://fatcat.wiki/release/xqe2z6evhrc27cvtxad5iiko4a">fatcat:xqe2z6evhrc27cvtxad5iiko4a</a> </span>
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Massive machine-type communications in 5g: physical and MAC-layer solutions

Carsten Bockelmann, Nuno Pratas, Hosein Nikopour, Kelvin Au, Tommy Svensson, Cedomir Stefanovic, Petar Popovski, Armin Dekorsy
<span title="">2016</span> <i title="Institute of Electrical and Electronics Engineers (IEEE)"> <a target="_blank" rel="noopener" href="https://fatcat.wiki/container/risok53fz5a7tj5f2bczy5zmpq" style="color: black;">IEEE Communications Magazine</a> </i> &nbsp;
In summary, the sparsity of codebooks, low projection techniques and blind detection with SCMA receiver make SCMA an attractive solution for uplink contention-based grant-free transmission in mMTC with  ...  A crucial component of uplink SCMA grant-free transmission is blind detection.  ... 
<span class="external-identifiers"> <a target="_blank" rel="external noopener noreferrer" href="https://doi.org/10.1109/mcom.2016.7565189">doi:10.1109/mcom.2016.7565189</a> <a target="_blank" rel="external noopener" href="https://fatcat.wiki/release/iwl6ooby3jcnzjbu67wdgtv2lu">fatcat:iwl6ooby3jcnzjbu67wdgtv2lu</a> </span>
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Satellite-Assisted Cell-Free Massive MIMO Systems with Multi-Group Multicast

Jiamin Li, Lingling Chen, Pengcheng Zhu, Dongming Wang, Xiaohu You
<span title="2021-09-16">2021</span> <i title="MDPI AG"> <a target="_blank" rel="noopener" href="https://fatcat.wiki/container/taedaf6aozg7vitz5dpgkojane" style="color: black;">Sensors</a> </i> &nbsp;
We propose to estimate channel state information (CSI) by common pilot scheme.  ...  In this paper, we use satellite-assisted and multi-group multicast mechanisms to relieve ground traffic pressure and improve data transmission efficiency of cell-free massive MIMO systems.  ...  In [16] , a time-division multi-group multicast transmission scheme was proposed in the scenario of integrating satellites and terrestrial multi-cells, dividing the signal transmission into ground transmission  ... 
<span class="external-identifiers"> <a target="_blank" rel="external noopener noreferrer" href="https://doi.org/10.3390/s21186222">doi:10.3390/s21186222</a> <a target="_blank" rel="external noopener" href="https://www.ncbi.nlm.nih.gov/pubmed/34577428">pmid:34577428</a> <a target="_blank" rel="external noopener" href="https://fatcat.wiki/release/53eagttqajcqpmbst332stshle">fatcat:53eagttqajcqpmbst332stshle</a> </span>
<a target="_blank" rel="noopener" href="https://web.archive.org/web/20210923023100/https://mdpi-res.com/d_attachment/sensors/sensors-21-06222/article_deploy/sensors-21-06222-v2.pdf" title="fulltext PDF download" data-goatcounter-click="serp-fulltext" data-goatcounter-title="serp-fulltext"> <button class="ui simple right pointing dropdown compact black labeled icon button serp-button"> <i class="icon ia-icon"></i> Web Archive [PDF] <div class="menu fulltext-thumbnail"> <img src="https://blobs.fatcat.wiki/thumbnail/pdf/9b/74/9b74449a7b134812ff57a278f9e2c07216b3936b.180px.jpg" alt="fulltext thumbnail" loading="lazy"> </div> </button> </a> <a target="_blank" rel="external noopener noreferrer" href="https://doi.org/10.3390/s21186222"> <button class="ui left aligned compact blue labeled icon button serp-button"> <i class="unlock alternate icon" style="background-color: #fb971f;"></i> mdpi.com </button> </a>

Towrad 5G Air Interface Technology: Sparse Code Muliple Access [article]

Fan Wei, Wen Chen, Yong peng Wu, Jun Li, Yuan Luo
<span title="2020-02-27">2020</span> <i > arXiv </i> &nbsp; <span class="release-stage" >pre-print</span>
Moreover, based on the framework of belief propagation, the SCMA Grant-Free transmission is introduced and the problem of collision resolution is also discussed.  ...  In this article, we present some recent progresses towards the design of multi-dimensional codebooks, the practical low complexity decoder, as well as the Grant-Free multiple access for SCMA system.  ...  We would consider specifically the low complexity Grant-Free receiver design and the collision resolution problem within the contention based transmission.  ... 
<span class="external-identifiers"> <a target="_blank" rel="external noopener" href="https://arxiv.org/abs/2002.12121v1">arXiv:2002.12121v1</a> <a target="_blank" rel="external noopener" href="https://fatcat.wiki/release/6sa6o65ssnel3as7ime26q3f3m">fatcat:6sa6o65ssnel3as7ime26q3f3m</a> </span>
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Ultra-low Latency, Low Energy and Massiveness in the 6G Era via Efficient CSIT-limited Schemes [article]

Onel L. A. López, Nurul H. Mahmood, Hirley Alves, Carlos M. Lima, Matti Latva-aho
<span title="2020-09-14">2020</span> <i > arXiv </i> &nbsp; <span class="release-stage" >pre-print</span>
We delve into the ideas of efficiently allocating pilot sequences, relying on statistical CSIT and/or using location-based strategies, and demonstrate viability via a selected use case.  ...  We overview the main limitations of CSI at transmitter side (CSIT)-based designs toward the 6G era, assess how to design and use efficient CSIT-limited schemes that allow meeting the new and stringent  ...  For the first time, herein we evaluate previous CSIT-free schemes in a multi-PB scenario.  ... 
<span class="external-identifiers"> <a target="_blank" rel="external noopener" href="https://arxiv.org/abs/2009.06446v1">arXiv:2009.06446v1</a> <a target="_blank" rel="external noopener" href="https://fatcat.wiki/release/uxgk2plmkveg3c6bi73vrbuhui">fatcat:uxgk2plmkveg3c6bi73vrbuhui</a> </span>
<a target="_blank" rel="noopener" href="https://web.archive.org/web/20200919115228/https://arxiv.org/pdf/2009.06446v1.pdf" title="fulltext PDF download" data-goatcounter-click="serp-fulltext" data-goatcounter-title="serp-fulltext"> <button class="ui simple right pointing dropdown compact black labeled icon button serp-button"> <i class="icon ia-icon"></i> Web Archive [PDF] </button> </a> <a target="_blank" rel="external noopener" href="https://arxiv.org/abs/2009.06446v1" title="arxiv.org access"> <button class="ui compact blue labeled icon button serp-button"> <i class="file alternate outline icon"></i> arxiv.org </button> </a>

Blind Multi-user Detection for Autonomous Grant-free High-Overloading MA without Reference Signal [article]

Zhifeng Yuan, Yuzhou Hu, Weimin Li, Jianqiang Dai
<span title="2017-12-07">2017</span> <i > arXiv </i> &nbsp; <span class="release-stage" >pre-print</span>
From the perspective of the transmitter side, pros and cons regarding diverse types of emerging grant-free transmission, particularly autonomous grant-free, are elaborated and presented in a comparative  ...  In this paper, a novel blind multi-user detection(MUD) framework for autonomous grant-free high-overloading non-orthogonal multiple access is introduced in detail aimed at fulfilling the requirements of  ...  or contention-free grant-free corresponding to the pre-configuration case.  ... 
<span class="external-identifiers"> <a target="_blank" rel="external noopener" href="https://arxiv.org/abs/1712.02601v1">arXiv:1712.02601v1</a> <a target="_blank" rel="external noopener" href="https://fatcat.wiki/release/k36xoadu4fgatayqe6r2jaiybq">fatcat:k36xoadu4fgatayqe6r2jaiybq</a> </span>
<a target="_blank" rel="noopener" href="https://web.archive.org/web/20200825021751/https://arxiv.org/ftp/arxiv/papers/1712/1712.02601.pdf" title="fulltext PDF download" data-goatcounter-click="serp-fulltext" data-goatcounter-title="serp-fulltext"> <button class="ui simple right pointing dropdown compact black labeled icon button serp-button"> <i class="icon ia-icon"></i> Web Archive [PDF] <div class="menu fulltext-thumbnail"> <img src="https://blobs.fatcat.wiki/thumbnail/pdf/3a/ac/3aac38f398f3daa94114e7e45f3fddafe1d6b2fb.180px.jpg" alt="fulltext thumbnail" loading="lazy"> </div> </button> </a> <a target="_blank" rel="external noopener" href="https://arxiv.org/abs/1712.02601v1" title="arxiv.org access"> <button class="ui compact blue labeled icon button serp-button"> <i class="file alternate outline icon"></i> arxiv.org </button> </a>

Grant-Free Uplink Transmission With Multi-Codebook-Based Sparse Code Multiple Access (MC-SCMA)

Ameha Tsegaye Abebe, Chung G. Kang
<span title="">2019</span> <i title="Institute of Electrical and Electronics Engineers (IEEE)"> <a target="_blank" rel="noopener" href="https://fatcat.wiki/container/q7qi7j4ckfac7ehf3mjbso4hne" style="color: black;">IEEE Access</a> </i> &nbsp;
In sparse code multiple access (SCMA)-based grant-free (GF) access, both user's channel and the selected SCMA codebook (CB) are considered as a transmission signature for multi-user detection (MUD).  ...  In conventional SCMA-based grant-free (GF) access where a single codebook (CB) is employed per a user's random access transmission, however, random selection of CBs and random fading channel reduce the  ...  MULTI-CODEBOOK SCMA (MC-SCMA)-BASED GRANT-FREE ACCESS SYSTEM A.  ... 
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Concatenated Graph Coding on Bandwidth Part for Secure Pilot Authentication in Grant-Free URLLC

Dongyang Xu, Pinyi Ren
<span title="">2020</span> <i title="Institute of Electrical and Electronics Engineers (IEEE)"> <a target="_blank" rel="noopener" href="https://fatcat.wiki/container/k7cf45sp7faezjq6aasftgokc4" style="color: black;">IEEE Open Journal of the Computer Society</a> </i> &nbsp;
Pilot authentication (PA) is a key security mechanism to guarantee reliable performance of grant-free URLLC.  ...  Simulation results show the security advantage of our proposed theory in grant-free URLLC system.  ...  The design created a CGC based grant-free URLLC system operating with UAD, TRP, channel estimation and data transmission.  ... 
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