Adaptive base station cooperation and subchannel reallocation at cell edge in cellular networks with fractional frequency reuse

Xu, Liang; Yamamoto, Koji; Murata, Hidekazu; Yoshida, Susumu

doi:10.1109/pimrc.2009.5449799

Cited by 8 publications

(4 citation statements)

References 4 publications

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“…On the other hand, studies by Nosratinia et al [30] and Laneman et al [31] suggested that a user having a relatively bad channel will be benefited more by using cooperation, which is rather intuitive. Hence, the results presented in [29] are counterintuitive with respect to the observations in [30] and [31]. We also note that the traffic load in the BSs and the individual user QoS should be considered while exploiting the signal from more than one BS, because the user QoS will define the need for multicell transmission, and the load on the BSs will decide the feasibility and limits of such transmissions.…”

Section: Related Work and Motivationmentioning

confidence: 77%

“…They suggested that the rate supported to a cell-edge user with cooperation among BSs is not always better than the transmission from a single BS. To improve the performance of fractional frequency reuse networks, BS cooperation was proposed by Xu et al [29] for cell-edge users to increase the system capacity. The authors showed that adaptive reallocation of subchannels can be used to further improve the performance.…”

Section: Related Work and Motivationmentioning

confidence: 99%

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QoS-Aware Downlink Cooperation for Cell-Edge and Handoff Users

Agarwal

Kumar

Gupta

2015

IEEE Trans. Veh. Technol.

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In this paper, we present a quality-of-service (QoS)aware cooperative downlink scheduling approach for cell-edge and handoff users that offers more reliability and higher effective capacity. The cooperation (handoff) region is defined for active handoff users between two adjacent base stations (BSs) as a function of the user QoS requirements and network load. In addition, the proposed technique inherently acquires intercell interference (ICI) coordination by adjusting the position and size of the cooperation window suitably. Numerical results are presented showing reliability, user QoS and capacity gain performance, and the region for cooperative scheduling in a coded communication scenario. Our analysis indicates that cooperation provides relatively less gain in effective capacity, i.e., up to about 40% with respect to noncooperative handoff, when the QoS requirement is loose. On the other hand, when the QoS requirement is more stringent, the effective capacity gain can increase up to nearly 100%. Additionally, we show that, while for applications with a loose QoS requirement the cooperation window size is small, i.e., nearly 1% of the total area of the BSs participating in cooperation, it increases quite significantly, i.e., up to nearly 25%, for the applications with stringent QoS. Although the outage performance of the proposed approach is poorer than the joint transmission mode of a cooperative multipoint scheme in lightly loaded networks, its effective capacity is significantly higher under varying network traffic load and QoS constraints.Index Terms-Cooperative handoff, cooperation region-ofinterest, effective capacity, outage probability. 0018-9545

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Section: Related Work and Motivationmentioning

confidence: 77%

Section: Related Work and Motivationmentioning

confidence: 99%

QoS-Aware Downlink Cooperation for Cell-Edge and Handoff Users

Agarwal

Kumar

Gupta

2015

IEEE Trans. Veh. Technol.

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“…Thus, in the handoff zone, the signals from two or more BSs can be exploited even if the MS is traveling at a high speed, because the coverage overlap region is sufficiently large. To exploit this genuine coverage overlap, simulation-based studies were independently carried out in [15] and [16] for downlink celledge users. Their results suggested that, the rate supported to a cell-edge user with resources from multiple BSs is not always better than the normal transmission from a single BS.…”

Section: Related Workmentioning

confidence: 99%

Class-Based Shared Resource Allocation for Cell-Edge Users in OFDMA Networks

Singhal

Kumar²,

et al. 2014

IEEE Trans. on Mobile Comput.

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Abstract-In this paper, we present a new resource allocation scheme for cell-edge active users to achieve improved performance in terms of a higher system capacity and better quality-of-service (QoS) guarantee of the users, where we utilize the two-dimensional resource allocation flexibility of orthogonal frequency division multiple access (OFDMA) networks. Here, the mobile stations (MSs) at the cell-edge can maintain parallel connections with more than one base station (BS) when it is in their coverage area. A MS, before handoff to a new BS, seeks to utilize additional resources from the other BSs if the BS through which its current session is registered is not able to satisfy its requirements. The handoff procedure is termed as split handoff. The BSs participate in split handoff operation while guaranteeing that they are able to maintain QoS of the existing connections associated with them. In this study, first, we present the proposed shared resource allocation architecture and protocol functionalities in split handoff, and give a theoretical proof of concept of system capacity gain associated with the shared resource allocation approach. Then, we provide a differentiated QoS provisioning approach that accounts for the MS speed, its channel quality, as well as the loads at different BSs. Via extensive simulations in Qualnet, the benefits of the proposed class-based split handoff approach is demonstrated. The results also indicate traffic load balancing property of the proposed scheme in heavy traffic conditions.

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“…Various studies have been conducted on the MS-SU-MIMO technique [8,9]. The MS-SU-MIMO technique improves throughput performance of cell edge user equipment but at the cost of additional assignments of radio resources from neighboring BSs to the cell edge user equipment.…”

Section: Introductionmentioning

confidence: 99%

BS-Cooperative Scheduler for a Multi-Site Single-User MIMO Cellular System

Kasahara

Fushiki

Nakano

et al. 2010

2010 IEEE 72nd Vehicular Technology Conference - Fall

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Multi-site MIMO (Multiple Input Multiple Output)is a key technology that will enable next generation cellular networks to achieve high throughput in cell-edge areas. However, a multi-site single-user MIMO system is subject to performance degradation in terms of overall system throughput due to the expense of additional assignments of radio resources to cell edge user equipment. This paper presents a scheduling scheme for a multi-site single-user MIMO cellular system. The proposed scheduling scheme aims to maintain overall system throughput while improving cell-edge user throughput. The proposed scheme employs two policies with respect to the assignment of radio resource to the user equipment with a multi-site connection in order to achieve the aim. One is to control the opportunities for radio resource assignment to user equipment with a multi-site connection. The other policy governs the decision as to whether or not the user equipment operates with a multi-site connection. The simulation results show that the proposed scheduler maintains system throughput while improving cell-edge user throughput.

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Adaptive base station cooperation and subchannel reallocation at cell edge in cellular networks with fractional frequency reuse

Cited by 8 publications

References 4 publications

QoS-Aware Downlink Cooperation for Cell-Edge and Handoff Users

QoS-Aware Downlink Cooperation for Cell-Edge and Handoff Users

Class-Based Shared Resource Allocation for Cell-Edge Users in OFDMA Networks

BS-Cooperative Scheduler for a Multi-Site Single-User MIMO Cellular System

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