Integrated load‐based power saving for real‐time and nonreal‐time traffic in <scp>LTE‐TDD</scp>

Yang, Chun-Chuan; Chen, Jeng-Yueng; Mai, Yi-Ting; Zhang, Pan

doi:10.1002/dac.3299

Cited by 1 publication

(4 citation statements)

References 15 publications

(13 reference statements)

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“…16 in our previous work [3]. The idea of LBPS was also extended to support sleep scheduling in LTE [4,5]. In this paper, we are focusing on a more general and complicated network environment in which there are a number of RNs under the same base station of DeNB in the mode of TDD.…”

Section: Methodsmentioning

confidence: 99%

“…In order to maintain a balance between power-saving efficiency and delay performance, the value of Data_TH is suggested to be the amount of data that can be transmitted in an LTE subframe. Moreover, Channel Quality Indicator (CQI) was used for estimating the capacity of a subframe [4,5]. Three LBPS schemes, that is, LBPS-Aggr, LBPS-Split, and LBPS-Merge, were designed to multiplex multiple UEs in sleep scheduling.…”

Section: Previous Work Of Lbpsmentioning

confidence: 99%

“…However, the assumption is no longer valid in the mode of TDD since the availability of subframes for DL and UL transmission depends on the TDD configuration. Therefore, in order for the LBPS schemes to be effectively applied to LTE-TDD, the idea of Virtual Time was proposed by the authors [5]. In the domain of virtual time, the subframes (virtual subframes) are available in a continuous manner so that the LBPS schemes can operate without any modification.…”

Section: Previous Work Of Lbpsmentioning

confidence: 99%

“…Mapping from a virtual subframe to the actual subframe(s) depends on how the available radio resource in a TDD configuration is allocated to the virtual subframe. In the authors' previous work [5], two methods of resource allocation were investigated, namely, continuous mapping and 1-to-1 first mapping. In continuous mapping, the available radio resource is allocated to each virtual subframe with an equal share in a continuous manner.…”

Section: Mapping Mechanismmentioning

confidence: 99%

See 3 more Smart Citations

Integrated sleep scheduling for multiple relays and UEs in LTE-TDD

Yang

Mai

Chen

et al. 2019

J Wireless Com Network

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Energy-saving for the LTE-A network with relay nodes in TDD mode is addressed in this paper, and integrated sleep scheduling schemes for relay nodes and user devices under a base station are designed. The authors' two previously proposed ideas, namely, Load-Based Power Saving (LBPS) and Virtual Time, are adopted in the design, and two strategies, namely, top-down and bottom-up each with three LBPS schemes are proposed. In the top-down strategy, the load as well as the channel quality on the backhaul link is first considered to determine the sleep pattern for all relay nodes, and then the sleep schedule for UEs under each relay node is determined accordingly. On the contrary, the load and the channel quality on the access links are first considered and then integrated into the sleep schedule on the backhaul link. Two associated mechanisms for the proposed LBPS schemes to operate in the virtual time domain are also proposed in the paper, i.e., calculation of the virtual subframe capacity and the mapping mechanisms from the virtual time to the actual time. The benefit of the proposed schemes in power saving over the standard-based scheme is demonstrated by the simulation study, and the bottom-up scheme of BU-Split outperforms the other schemes under equally distributed input load as well as the hotspot scenario. Discussion on the tradeoff of the processing overhead and the performance for the proposed schemes is presented in the paper.

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