Conference Paper

Efficient Packet Scheduling Schemes for Multiantenna Packet Radio Downlink.

DOI: 10.1109/AICT.2009.73 Conference: The Fifth Advanced International Conference on Telecommunications, AICT 2009, 24-28 May 2009, Venice/Mestre, Italy
Source: DBLP

ABSTRACT In this paper, we propose fairness-oriented dual-stream multiple-input multiple-output (MIMO) packet scheduling schemes for future multi-antenna packet radio systems. In general, multi-user transmit-receive schemes allow users to be scheduled on different parallel streams on the same time-frequency resource. Based on that, implementations of more intelligent scheduling schemes that are aware of the instantaneous state of the radio channel require utilization of time, frequency and spatial domain resources in an efficient manner. Stemming from the earlier advanced proportional fair (PF) scheduler studies, we extend the developments to dual-stream MIMO packet radios. Furthermore, we investigate the resulting fairness distribution among users together with efficiency in increasing the system capacity in terms of throughput and coverage by simulating practical orthogonal frequency division multiple access (OFDMA) system environment with MIMO functionality in micro and macro cell scenarios. As a concrete example, we demonstrate that by using new multi-user scheduling schemes, significant coverage improvements in the order of 30% can be obtained at the expense of only 14% throughput loss. Furthermore, the user fairness is also greatly increased, by more than 18%, when measured using Jainpsilas fairness index.

0 Bookmarks
 · 
48 Views
  • [Show abstract] [Hide abstract]
    ABSTRACT: In this paper, we study and analyze the performance of advanced OFDM packet scheduling techniques with given QoS requirements under the 3GPP UTRAN Long Term Evolution (LTE) framework. Stemming from our previous studies in scheduling algorithm developments, we show that the main radio resource management (RRM) performance measures such as fairness, throughput and coverage are efficiently controlled by proper scheduling priority metric calculations utilizing time-, frequency- and spatial domains. The proposed scheduling algorithms are able to meet the higher layer quality of service (QoS) targets, taking into account Constant Bit Rate (CBR) traffic scenarios with Guaranteed Bit Rate (GBR) constrains as well as instantaneous user channel conditions. Moreover, we demonstrate that by using such algorithms, significant coverage improvements in the order of 40% can be obtained at the expense of 8% total throughput loss compared to more traditional scheduling approaches. Furthermore, the user fairness is also greatly increased, by more than 15% when measured using Jain's fairness index.
    Broadband Network and Multimedia Technology (IC-BNMT), 2010 3rd IEEE International Conference on; 11/2010
  • [Show abstract] [Hide abstract]
    ABSTRACT: In this paper, we propose fairness-oriented packet scheduling (PS) schemes with power-efficient control mechanism for future packet radio systems. In general, multi-antenna transmit-receive schemes provide additional flexibility to packet scheduler functionality. Stemming from the earlier enhanced proportional fair scheduler studies for single-input multiple-output (SIMO) and multiple-input multiple-output (MIMO) systems, we extend the development of efficient packet scheduling algorithms by adding transmit power considerations in the overall priority metrics calculations and scheduling decisions. Furthermore, we evaluate the proposed scheduling schemes by simulating practical orthogonal frequency division multiple access (OFDMA) based packet radio system in terms of throughput, coverage and fairness distribution among users. As a concrete example, under reduced overall transmit power constraint and unequal power distribution for different sub-bands, we demonstrate that by using the proposed power-aware multi-user scheduling schemes, significant coverage and fairness improvements in the order of 70% and 20% can be obtained, at the expense of average throughput loss of only 15%.
    First International Conference on Networks and Communications, NetCoM 2009, Chennai, India, December 27-29, 2009; 01/2009
  • [Show abstract] [Hide abstract]
    ABSTRACT: The radio resource management functionality plays an important role in new OFDMA based networks. The control of the network resource division among the users is performed by packet scheduling functionality based on maximizing cell coverage and capacity while satisfying certain quality of service constrains. In order to mitigate inter-cell and co-channel interference problems in OFDMA cellular networks, soft frequency reuse with different power mask patterns is used. Stemming from our previous studies in scheduling algorithm developments, we extend the usability of packet scheduling techniques with built in transmit power considerations in the overall priority metrics calculations and scheduling decisions. In this paper, we investigate the system performance of combined soft frequency reuse schemes with advanced power-aware packet scheduling algorithms for further optimization between user fairness and cell throughput. As a concrete example, we demonstrate that by using such technique significant coverage improvements in the order of 30% can be obtained at the expense of only 14% throughput loss. Furthermore, the user fairness is also greatly increased, by more than 18%, when measured using Jain's fairness index.
    Future Network and Mobile Summit, 2010; 07/2010