Coordinated multi-point （CoMP） transmission is a promising technique to improve both cell average and cell edge throughput for long term evolution-advanced （LTE-A）. For CoMP joint transmission （CoMP-JT） in heter...Coordinated multi-point （CoMP） transmission is a promising technique to improve both cell average and cell edge throughput for long term evolution-advanced （LTE-A）. For CoMP joint transmission （CoMP-JT） in heterogeneous scenario, if joint transmission （JT） users are firstly scheduled, other non-JT users will not be allocated sufficient resources, i.e., scheduling relevancy exists in the users under different cells in the same coordination cluster. However, the CoMP system throughput will decline remarkably, if the impact of scheduling relevancy is not considered. To address this issue, this paper proposes a novel scheduling scheme for CoMP in heterogeneous scenario. The principles of the proposed scheme include two aspects. Firstly, this scheme gives priority to user fairness, based on an extended proportional fairness （PF） scheduling algorithm. Secondly, the throughput of the coordination cluster should be maintained at a high level. By taking the non-CoMP system as a baseline, the proposed scheme is evaluated by comparing to random PF （RPF） and orthogonal PF （OPF） scheme. System-level simulation results indicate that, the proposed scheme can achieve considerable performance gain in both cell average and cell edge throughput.展开更多
In Orthogonal Frequency Division Multiple Access (OFDMA) systems, such as Long Term Evolution (LTE) and so on, the resources used by each user are orthogonal, and the OFDMA systems performances are mainly affected by ...In Orthogonal Frequency Division Multiple Access (OFDMA) systems, such as Long Term Evolution (LTE) and so on, the resources used by each user are orthogonal, and the OFDMA systems performances are mainly affected by the inter-cell interference. Therefore, the inter-cell interference mitigation technology becomes a hotspot. The objective of interference mitigation technologies used in OFDMA systems are to increase cell-edge throughput and average cell throughput. In this paper, the Resource Block Planning (BRBP) based scheme is proposed to mitigate the inter-cell interference and improve the cell-edge throughput. Comparison between the simulation results of BRBP and Round Robin (RR) illustrates that the enhanced performance of BRBP.展开更多
异构网(HetNet)是增强小区覆盖、提高小区吞吐量的有效途径。通用移动通信系统(Universal Mobile Telecommunications System,UMTS)引入多流多载波技术作为HetNet增强方案,可以进一步提高系统吞吐量。针对多流多载波HetNet场景下各类型...异构网(HetNet)是增强小区覆盖、提高小区吞吐量的有效途径。通用移动通信系统(Universal Mobile Telecommunications System,UMTS)引入多流多载波技术作为HetNet增强方案,可以进一步提高系统吞吐量。针对多流多载波HetNet场景下各类型小区负载不均衡的问题,建立了一个多流多载波HetNet用户归属联合优化模型,并通过求解该模型给出了具体的算法流程。仿真结果表明,相对于已有的Bias方案和软复用方案,所提算法能够在提升用户平均吞吐量的同时,显著提高小区边缘用户吞吐量和用户速率公平性。展开更多
基金supported by the National Science and Technology Major Project of China(2012ZX03001039,2012ZX03003008)the Beijing City Science and Technology Project(D121100002112002)+1 种基金China-EU International Scientific and Technological Cooperation Program(0902)the International Scientific and Technological Cooperation Program(2010DFA11060)
文摘Coordinated multi-point （CoMP） transmission is a promising technique to improve both cell average and cell edge throughput for long term evolution-advanced （LTE-A）. For CoMP joint transmission （CoMP-JT） in heterogeneous scenario, if joint transmission （JT） users are firstly scheduled, other non-JT users will not be allocated sufficient resources, i.e., scheduling relevancy exists in the users under different cells in the same coordination cluster. However, the CoMP system throughput will decline remarkably, if the impact of scheduling relevancy is not considered. To address this issue, this paper proposes a novel scheduling scheme for CoMP in heterogeneous scenario. The principles of the proposed scheme include two aspects. Firstly, this scheme gives priority to user fairness, based on an extended proportional fairness （PF） scheduling algorithm. Secondly, the throughput of the coordination cluster should be maintained at a high level. By taking the non-CoMP system as a baseline, the proposed scheme is evaluated by comparing to random PF （RPF） and orthogonal PF （OPF） scheme. System-level simulation results indicate that, the proposed scheme can achieve considerable performance gain in both cell average and cell edge throughput.
文摘In Orthogonal Frequency Division Multiple Access (OFDMA) systems, such as Long Term Evolution (LTE) and so on, the resources used by each user are orthogonal, and the OFDMA systems performances are mainly affected by the inter-cell interference. Therefore, the inter-cell interference mitigation technology becomes a hotspot. The objective of interference mitigation technologies used in OFDMA systems are to increase cell-edge throughput and average cell throughput. In this paper, the Resource Block Planning (BRBP) based scheme is proposed to mitigate the inter-cell interference and improve the cell-edge throughput. Comparison between the simulation results of BRBP and Round Robin (RR) illustrates that the enhanced performance of BRBP.
文摘异构网(HetNet)是增强小区覆盖、提高小区吞吐量的有效途径。通用移动通信系统(Universal Mobile Telecommunications System,UMTS)引入多流多载波技术作为HetNet增强方案,可以进一步提高系统吞吐量。针对多流多载波HetNet场景下各类型小区负载不均衡的问题,建立了一个多流多载波HetNet用户归属联合优化模型,并通过求解该模型给出了具体的算法流程。仿真结果表明,相对于已有的Bias方案和软复用方案,所提算法能够在提升用户平均吞吐量的同时,显著提高小区边缘用户吞吐量和用户速率公平性。
