Optimizing Feedback User Selection for Standalone U-LTE Networks With Randomly Delayed CSI
Accurate channel state information (CSI) plays a critical role in channel-aware transmissions. However, in standalone long-term evolution networks in unlicensed spectrum, it is challenging to obtain accurate CSI timely via intermittent and random channel access. In this letter, we propose an optimiz...
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| Veröffentlicht in: | IEEE wireless communications letters 2019-08, Vol.8 (4), p.1236-1239 |
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| container_title | IEEE wireless communications letters |
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| creator | Shan, Hangguan Qin, Taojie Yu, Guanding Cai, Lin X. Cheng, Yu Quek, Tony Q. S. |
| description | Accurate channel state information (CSI) plays a critical role in channel-aware transmissions. However, in standalone long-term evolution networks in unlicensed spectrum, it is challenging to obtain accurate CSI timely via intermittent and random channel access. In this letter, we propose an optimization framework to achieve the maximum user utility with appropriate user selection for CSI feedback. Specifically, in the proposed framework, the selection of CSI feedback users is optimized together with subchannel pre-allocation for maximizing the proportional fairness utility of users' expected throughput of future channel access, considering the impact of randomly delayed CSI due to channel contentions. Simulation results show the effectiveness of the proposed optimization framework. |
| doi_str_mv | 10.1109/LWC.2019.2912598 |
| format | Article |
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Simulation results show the effectiveness of the proposed optimization framework.</description><identifier>ISSN: 2162-2337</identifier><identifier>EISSN: 2162-2345</identifier><identifier>DOI: 10.1109/LWC.2019.2912598</identifier><identifier>CODEN: IWCLAF</identifier><language>eng</language><publisher>Piscataway: IEEE</publisher><subject>Channel estimation ; Data communication ; Delays ; Feedback ; Long Term Evolution ; Mobile communication systems ; Optimization ; Queuing theory ; randomly delayed CSI ; Standalone LTE in unlicensed spectrum ; Throughput ; user selection for CSI feedback ; Wireless communications ; Wireless fidelity</subject><ispartof>IEEE wireless communications letters, 2019-08, Vol.8 (4), p.1236-1239</ispartof><rights>Copyright The Institute of Electrical and Electronics Engineers, Inc. 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Simulation results show the effectiveness of the proposed optimization framework.</description><subject>Channel estimation</subject><subject>Data communication</subject><subject>Delays</subject><subject>Feedback</subject><subject>Long Term Evolution</subject><subject>Mobile communication systems</subject><subject>Optimization</subject><subject>Queuing theory</subject><subject>randomly delayed CSI</subject><subject>Standalone LTE in unlicensed spectrum</subject><subject>Throughput</subject><subject>user selection for CSI feedback</subject><subject>Wireless communications</subject><subject>Wireless fidelity</subject><issn>2162-2337</issn><issn>2162-2345</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2019</creationdate><recordtype>article</recordtype><sourceid>RIE</sourceid><recordid>eNo9kN9rwjAQx8PYYOJ8H-wlsOe6Jmnz43F0ugllwlSEvYSaXrZqbVxaGe6vX0TxXu6O-97dlw9C9yQeEhKrp3yZDWlM1JAqQlMlr1CPEk4jypL0-lIzcYsGbbuOQ_CYUCJ76HO666pt9Vc1X3gMUK4Ks8GLFjyeQQ2mq1yDrQtdVzRlUbsG8CLK5yP8Dt2v85sWL6vuG3-EqdvWB_wCdXGAEmezyR26sUXdwuCc-2gxHs2ztyifvk6y5zwywW0XMWtLXlBhUpEyzlPCSlDJSnHJbckoLy2nAEwYKhOmjGSwUoYJKiyjMjhmffR4urvz7mcPbafXbu-b8FJTKiRTqaI8qOKTynjXth6s3vlqW_iDJrE-QtQBoj5C1GeIYeXhtFIBwEUuuUqkEOwf9plsEw</recordid><startdate>20190801</startdate><enddate>20190801</enddate><creator>Shan, Hangguan</creator><creator>Qin, Taojie</creator><creator>Yu, Guanding</creator><creator>Cai, Lin X.</creator><creator>Cheng, Yu</creator><creator>Quek, Tony Q. 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S.</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Optimizing Feedback User Selection for Standalone U-LTE Networks With Randomly Delayed CSI</atitle><jtitle>IEEE wireless communications letters</jtitle><stitle>LWC</stitle><date>2019-08-01</date><risdate>2019</risdate><volume>8</volume><issue>4</issue><spage>1236</spage><epage>1239</epage><pages>1236-1239</pages><issn>2162-2337</issn><eissn>2162-2345</eissn><coden>IWCLAF</coden><abstract>Accurate channel state information (CSI) plays a critical role in channel-aware transmissions. However, in standalone long-term evolution networks in unlicensed spectrum, it is challenging to obtain accurate CSI timely via intermittent and random channel access. In this letter, we propose an optimization framework to achieve the maximum user utility with appropriate user selection for CSI feedback. Specifically, in the proposed framework, the selection of CSI feedback users is optimized together with subchannel pre-allocation for maximizing the proportional fairness utility of users' expected throughput of future channel access, considering the impact of randomly delayed CSI due to channel contentions. Simulation results show the effectiveness of the proposed optimization framework.</abstract><cop>Piscataway</cop><pub>IEEE</pub><doi>10.1109/LWC.2019.2912598</doi><tpages>4</tpages></addata></record> |
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| source | IEEE Electronic Library (IEL) |
| subjects | Channel estimation Data communication Delays Feedback Long Term Evolution Mobile communication systems Optimization Queuing theory randomly delayed CSI Standalone LTE in unlicensed spectrum Throughput user selection for CSI feedback Wireless communications Wireless fidelity |
| title | Optimizing Feedback User Selection for Standalone U-LTE Networks With Randomly Delayed CSI |
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