This paper proposes the concept of inter-cell relay for downlink orthogonal frequency division multiple access(OFDMA) cellular systems, which uses multi-hop to relay calls from overloaded cells to light-load neighbori...This paper proposes the concept of inter-cell relay for downlink orthogonal frequency division multiple access(OFDMA) cellular systems, which uses multi-hop to relay calls from overloaded cells to light-load neighboring cells. It is shown that when using inter-cell relay, the number of calls in the congestion cell can be significantly increased. The congestion cell is divided into two parts. One is called non-relay area(NRA), in which a call directly communicates with the base station(BS) of a congested cell. The other is called relay area(RA), in which a call communicates with the BS of a neighboring cell through a relay station(RS). The two parts have different user-call densities. By adjusting the densities of two parts, we will maximize the number of supported calls inside a congested cell. The results show the benefits gained from inter-cell relay in congestion relief, which can reduce cell congestion by fully utilizing the available resources in the neighboring cells.展开更多
基金National Natural Science Foundation of China under grant number (61872186,61872193)The National Natural Science Foundation of China for Youth (61201160, 61602263)+8 种基金The Natural Science Foundation of Jiangsu Province (BK20131377, BK20151507, BK20160916)The Natural science fund for colleges and universities in Jiangsu Province under Grants (16KJB510034)The six talent peaks project in Jiangsu Province (XYDXXJS-044)A Project Funded by the Priority Academic Program Development of Jiangsu Higher Education Institutions (yx002001)The Jiangsu Overseas Research and Training Program for University Prominent Young and Middle-aged Teachers and PresidentsSponsored by NUPTSF (Grant Nos. NY212012, NY214065,NY216020)The Six Talented Eminence Foundation of Jiangsu Province (No. XYDXXJS-044)The 333 High-level Talents Training Project of Jiangsu ProvinceThe 1311 Talents Plan of NUPT and the China Postdoctoral Science Foundation (No. 2018M630590)
文摘This paper proposes the concept of inter-cell relay for downlink orthogonal frequency division multiple access(OFDMA) cellular systems, which uses multi-hop to relay calls from overloaded cells to light-load neighboring cells. It is shown that when using inter-cell relay, the number of calls in the congestion cell can be significantly increased. The congestion cell is divided into two parts. One is called non-relay area(NRA), in which a call directly communicates with the base station(BS) of a congested cell. The other is called relay area(RA), in which a call communicates with the BS of a neighboring cell through a relay station(RS). The two parts have different user-call densities. By adjusting the densities of two parts, we will maximize the number of supported calls inside a congested cell. The results show the benefits gained from inter-cell relay in congestion relief, which can reduce cell congestion by fully utilizing the available resources in the neighboring cells.
