LBPS: Load-Based Power Saving in the IEEE 802.16e Network

et al. 2015

Int J Communication

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By introduction of relay nodes, LTE-Advanced can provide enhanced coverage and capacity at cell edges and hot-spot areas. The authors have been researching the issue of power saving in mobile communications technology such as WiMax and Long Term Evolution (LTE) for some years. Based on the previous idea of load-based power saving, two strategies each with associated schemes to integrated relay nodes and user equipment in power saving are proposed in the paper. Simulation study shows the benefit of the proposed schemes in terms of better power saving than the standard-based scheme at the cost of moderately increased delay. Extended discussion about the impact of different load distribution among user equipments and the impact of a worse backhaul link on power saving is also presented in the paper.

Section: Ue-first Strategymentioning

confidence: 99%

Integrated power saving for relay node and user equipment in LTE‐A

et al. 2015

Int J Communication

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“…The main reason is that most existing mechanisms in a sense adopt a passive way of control in which the sleep schedule is shaped passively by the result of the previous sleep cycle without any information about traffic load or characteristics. To accurately determine the proper sleep schedule, the idea of load‐based power saving ( LBPS ) in the category of type III has been proposed in our previous works . LBPS models and measures traffic proactively, and the sleep schedule is then determined by the estimated traffic load.…”

Section: Introductionmentioning

confidence: 99%

“…LBPS models and measures traffic proactively, and the sleep schedule is then determined by the estimated traffic load. Three LBPS schemes for MSS sleep scheduling were proposed: LBPS‐aggr , LBPS‐split , and LBPS‐merge . A power‐saving scheme integrating real‐time traffic and non‐real‐time traffic was also proposed .…”

Section: Introductionmentioning

confidence: 99%

Integrated load-based power saving for BS and MSS in the IEEE 802.16e network

Wirel. Commun. Mob. Comput.

et al. 2013

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In our previous work, the limitation of standard type I and II power saving in IEEE 802.16e was discussed, and the idea of load-based power saving (LBPS) was proposed for better power-saving efficiency. LBPS measures traffic load and adaptively generates proper sleep schedule for the current load. Three LBPS schemes have been proposed for mobile subscriber station (MSS) power saving. In this paper, base station (BS) power saving is taken into consideration, and our previously proposed LBPS schemes, are extended and revised to integrate both BS and MSS in sleep scheduling. Two strategies of integrated power saving, MSS first and BS first, each with associated LBPS schemes are proposed in the paper. A three-staged concept combining the proposed strategies is also presented to make the best of integrated power saving. A simulation study shows that the proposed schemes can effectively achieve high power-saving efficiency for both BS and MSS.

“…A degraded merge is performed only when a non-degraded merge cannot be found. For details, please refer to our previous work [17]. )…”

Section: Else (Merging Operation)mentioning

confidence: 99%

“…The idea of LoadBased Power Saving (LBPS) and associated schemes were proposed to adaptively schedule the sleep (radio-off) time of the user device for the current network load [17]. Extension of LBPS to integrate the user side and the network side in sleep scheduling was also proposed [18].…”

Section: Introductionmentioning

confidence: 99%

Adaptive load-based and channel-aware power saving for non-real-time traffic in LTE

et al. 2015

J Wireless Com Network

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The popularity of handheld devices, which are usually powered by batteries, has made power saving an important and practical issue in recent years. Techniques of power saving for user devices using mobile communication systems such as WiMAX and LTE (Long-Term Evolution) are parts of the major focuses in the literature. In this paper, two revised schemes of the authors' previously proposed power saving schemes for IEEE 802.16 are proposed to be applied in LTE. The proposed schemes, namely LTE-LBPS-Aggr and LTE-LBPS-Merge, estimate the input load by traffic measurement and the channel capacity by channel quality indicator (CQI) reports, calculate the length of the sleep cycle, and notify related user equipments (UEs) of the next radio-on time for receiving data. The difference between LTE-LBPS-Aggr and LTE-LBPS-Merge lies in the grouping of UEs for sleep scheduling. LTE-LBPS-Aggr treats all UEs in a group, while LTE-LBPS-Merge allows multiple groups of UEs in sleep scheduling. The simulation study shows that in comparison with standard-based mechanisms, the proposed schemes can achieve better power saving efficiency at the cost of moderate increase on delays and the signaling overhead.