CU-LTE: Spectrally-efficient and fair coexistence between LTE and Wi-Fi in unlicensed bands

  title={CU-LTE: Spectrally-efficient and fair coexistence between LTE and Wi-Fi in unlicensed bands},
  author={Zhangyu Guan and Tommaso Melodia},
  journal={IEEE INFOCOM 2016 - The 35th Annual IEEE International Conference on Computer Communications},
  • Zhangyu GuanT. Melodia
  • Published 10 April 2016
  • Computer Science, Business
  • IEEE INFOCOM 2016 - The 35th Annual IEEE International Conference on Computer Communications
To cope with the increasing scarcity of spectrum resources, researchers have been working to extend LTE/LTE-A cellular systems to unlicensed bands, leading to so-called unlicensed LTE (U-LTE). However, this extension is by no means straightforward, primarily because the radio resource management schemes used by LTE and by systems already deployed in unlicensed bands are incompatible. Specifically, it is well known that coexistence with scheduled systems like LTE degrades considerably the… 

Figures and Tables from this paper

Chance-Constrained Spectrum Allocation for Fair LTE-U/Wi-Fi Coexistence

Simulations results show that the proposed algorithm provides fairness to the Wi-Fi system by adjusting the LTE-U duty-cycle, which is a chance-constrained optimization problem such as to maintain certainWi-Fi performance.

Full-Duplex Assisted LTE-U/Wifi Coexisting Networks in Unlicensed Spectrum

Numerical results show that the proposed fair FDTT-MAC protocol can improve the channel utilization in unlicensed spectrum and can increase the throughput of Wi-Fi without greatly degrading the throughputof LTE-U for coexisting wireless networks as compared with existing schemes.

Efficient and fairWi-Fi and LTE-U coexistence via communications over content centric networking

A novel mechanism over CCN containing two modes of communication (direct and indirect) between LTE-U and Wi-Fi systems is proposed in this paper and demonstrates that the proposed mechanism and approaches can effectively ensure the fair coexistence of LTE- U andWi-Fi in unlicensed spectrums and improve the overall channel utilization of un licensed spectrums.

Embedding LTE-U within Wi-Fi Bands for Spectrum Efficiency Improvement

This article presents a comprehensive overview of the LTE-U technology, and proposes a novel hyper access point (HAP) that integrates the functionalities of LTE small cell base station and commercial Wi-Fi AP for deployment by cellular network operators.

Harmonious Coexistence and Efficient Spectrum Sharing for LTE-U and Wi-Fi

  • Zhefeng JiangS. Mao
  • Business, Computer Science
    2017 IEEE 14th International Conference on Mobile Ad Hoc and Sensor Systems (MASS)
  • 2017
An analysis framework for the Carrier Sensing Adaptive Transmission (CSAT) mechanism is developed, which leads to a Listen-Before-Talk (LBT) enhanced CSAT scheme that achieves capacity gains for both LTE-U and Wi-Fi, and provides useful guidelines on achieving fairness.

Fair Coexistence of LTE and WiFi-802.11 in Unlicensed Spectrum: A Systematic Literature Review

This paper aims to conduct a systematic literature review to find all the issue about fair coexistence of the LTE and WiFi in the unlicensed spectrum band and highlight the proposed mechanism and analyze the impact of all these techniques to provide the fair coexist of these wireless technologies with synthesis analysis of previous work.

Ruin Theory for Dynamic Spectrum Allocation in LTE-U Networks

A fair time-sharing model based on the ruin theory is proposed to share redundant spectral resources from the unlicensed band with LTE-U without jeopardizing the performance of the WiFi system.

Break-Even Point-Based Radio Resource Management for Fair Coexistence between U-LTE and Wi-Fi

By using proposed BEP scheme, the proposed Break-Even Point scheme guarantees cellular network utilizations with optimal precision, as well as, performance evaluation indicates that optimal spectrum access and fair distribution by using BEP Scheme is indicated.



Performance Evaluation of LTE and Wi-Fi Coexistence in Unlicensed Bands

A simulator-based system- level analysis in order to assess the network performance in an office scenario shows that LTE system performance is slightly affected by coexistence whereas Wi-Fi is significantly impacted by LTE transmissions.

License-exempt LTE deployment in heterogeneous network

This paper investigates deploying LTE on a license-exempt band as part of the pico-cell underlay and shows that LTE can deliver significant capacity even while sharing the spectrum with WiFi systems.

Supporting WiFi and LTE co-existence

  • Sangki YunL. Qiu
  • Computer Science
    2015 IEEE Conference on Computer Communications (INFOCOM)
  • 2015
A novel system to enable co-existence between LTE and WiFi that can decode all the interfering signals under cross technology interference, and has a simple yet effective carrier sense mechanism for WiFi to access the medium under interfering LTE signals while avoiding other WiFi transmissions.

Coexistence of LTE and WiFi heterogeneous networks via inter network coordination

This project proposes an inter-network coordination architecture which facilitates dynamic spectrum management in the HetNet for interference mitigation and efficient spectrum utilization, and aims to model interference between LTE and WiFi networks through experimental evaluation using the ORBIT testbed and the USRP/GNU radio platform.

Towards frequency reuse 1 cellular FDM/TDM systems

It is demonstrated how beamforming antennas in combination with an intelligent interference coordination in-between cells can be used to achieve the goal of fully utilizing the complete available frequency spectrum in each cell.

Enabling coexistence of heterogeneous wireless systems: case for ZigBee and WiFi

An analytical framework is established that relates its key design parameters to performance and cost and demonstrates CBT's significant throughput improvement over the legacy ZigBee protocol, with negligible performance loss to WiFi.

Characterizing the capacity region in multi-radio multi-channel wireless mesh networks

This paper provides necessary conditions to verify the feasibility of rate vectors in next generation fixed wireless broadband networks, and uses them to derive upper bounds on the capacity in terms of achievable throughput, using a fast primal-dual algorithm.

On Number of Almost Blank Subframes in Heterogeneous Cellular Networks

It is found that using ABSFs is advantageous for the system since victim users no longer suffer from poor performance for the price of relatively small drop in higher throughput percentiles and offers an easy way to analyze impact of network parameters.

Coexistence mechanisms for interference mitigation in the 2.4-GHz ISM band

Two coexistence mechanisms based on traffic scheduling techniques that mitigate interference between different wireless systems operating in the 2.4-GHz industrial, medical, and scientific band are proposed.

System performance of LTE and IEEE 802.11 coexisting on a shared frequency band

The system performance analysis of 3GPP Long-Term Evolution (LTE) and IEEE 802.11 Wireless Local Area Networks (WLAN) in a situation where LTE downlink has been expanded over to unlicensed frequency band usually used by WLAN is presented.