Uplink scheduling in LTE systems using distributed base stations

Yaacoub, Elias; Dawy, Zaher

doi:10.1002/ett.1408

Cited by 14 publications

(8 citation statements)

References 30 publications

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“…The suboptimal algorithms can then be implemented using the best antenna pair for each subcarrier. It should be noted that packet scheduling algorithms for uplink MIMO single‐carrier frequency‐division multiple access systems are investigated in and suboptimal uplink scheduling with continuous rates and distributed antenna systems (a form of distributed MIMO) is studied in .…”

Section: Resultsmentioning

confidence: 99%

Uplink OFDMA resource allocation with discrete rates: optimal solution and suboptimal implementation

Yaacoub

El-Hajj

Dawy

2011

Trans. Emerg. Telecomms. Techs.

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Resource allocation in the uplink of orthogonal frequency‐division multiple access systems is investigated. The problem of ergodic utility maximisation with discrete rates is formulated and solved using dual Lagrangian techniques. Suboptimal algorithms based on equal power allocation over the subcarriers are proposed. Results are presented and compared for the continuous and discrete rates scenario, using both the optimal solutions and the suboptimal algorithms. Equal power allocation is shown to approximate well the optimal solution in the continuous rates case, as well as in the discrete rates scenario when the number of modulation and coding schemes increases. Copyright © 2011 John Wiley & Sons, Ltd.

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Section: Resultsmentioning

confidence: 99%

Uplink OFDMA resource allocation with discrete rates: optimal solution and suboptimal implementation

Yaacoub

El-Hajj

Dawy

2011

Trans. Emerg. Telecomms. Techs.

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“…For the joint UL-DL users scheduling [19], a modified OS technique is required, as the best user in DL may have a deficient channel in the UL that disables UL reception, and therefore the whole connection is dropped. Having in mind that the same user must be selected for UL and DL as we tackle a bi-directional connection, then the users scheduling is not trivial.…”

Section: Ul-dl Opportunistic Schedulingmentioning

confidence: 99%

Opportunistic bi-directional scheduling under quality of experience demands

Yaacoub

El-Hajj

Dawy

et al. 2013

Proceedings of the 2nd ACM Workshop on High Performance Mobile Opportunistic Systems

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Quality of Experience (QoE) is a very important metric in wireless communication systems, where customers request strict QoE demands that translate into restrictions on both Uplink (UL) and Downlink (DL) connections. The development of wireless communications standards and the emergence of new interactive and conversational services with bi-directional QoE requirements changes the scheduling context from a link-level to a system level. To this end, this paper presents a joint UL-DL bandwidth allocation approach that considers outage as the main QoE parameter to be minimized. The well-known opportunistic scheduling algorithm is first modified to account for the UL-DL coupling and mathematical expressions of both the outage probability and its QoE are derived. Then the expressions are employed in the joint UL-DL bandwidth allocation problem. The formulated problem is shown to be a convex optimization problem. Simulation results demonstrate the merits of the proposed approach compared to traditional techniques.

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“…Uplink scheduling in LTE system with distributed BSs is considered in [16]. In the proposed model, users are connected to the relays deployed throughout the cell and connected to a central BS.…”

Section: Related Workmentioning

confidence: 99%