Cell Cooperation Based Channel Access Mechanism for LAA and WiFi Coexistence

Peilin Liu, Mao Yang, Zhongjiang Yan, Bo Li

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

Abstract

In 2014, the 3rd Generation Partnership Project (3GPP) proposed the ‘‘Licensed-Assisted Access using LTE’’ (LAA) research project, with the intention to further improve LTE network capacity by deploying LTE system in 5GHz unlicensed frequency band. But deploying LAA in unlicensed band will inevitably affect other existing wireless systems such as WiFi and increase the risk of data collision. Therefore, the research of coexistence between LAA and WiFi is of great significance to facilitate the fair sharing and efficient utilization of unlicensed spectrum sources. However, the existing studies consider the relationship between LAA and WiFi in the coexistence scenario from the perspective of contention. In this paper, we proposed a cell cooperation based channel access mechanism. The basic idea of the proposed scheme is let an LAA cell and a WiFi cell establish a pair of cooperative relationship. Once LAA node accesses the channel, it will notify its cooperated pair WiFi node to share the transmission opportunity, and vice versa. After the transmission of the LAA node, the WiFi node can access the channel without performing backoff again. Simulation results manifest that the proposed cell cooperation based channel access mechanism improves the communication performances of both LAA and WiFi as well as the spectrum efficiency in the coexistence scenarios with high channel resources demand.

Original languageEnglish
Title of host publicationSmart Grid and Internet of Things - 4th EAI International Conference, SGIoT 2020, Proceedings
EditorsYi-Bing Lin, Der-Jiunn Deng
PublisherSpringer Science and Business Media Deutschland GmbH
Pages500-515
Number of pages16
ISBN (Print)9783030695132
DOIs
StatePublished - 2021
Event4th EAI International Conference on Smart Grid and Internet of Things, SGIoT 2020 - TaiChung, Taiwan, Province of China
Duration: 5 Dec 20206 Dec 2020

Publication series

NameLecture Notes of the Institute for Computer Sciences, Social-Informatics and Telecommunications Engineering, LNICST
Volume354
ISSN (Print)1867-8211
ISSN (Electronic)1867-822X

Conference

Conference4th EAI International Conference on Smart Grid and Internet of Things, SGIoT 2020
Country/TerritoryTaiwan, Province of China
CityTaiChung
Period5/12/206/12/20

Keywords

  • Cell cooperation
  • CSMA/CA
  • LBT-Cat4

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