Abstract
The use of unlicensed bands is one of the most promising features envisaged to increase capacity in 5G. However, this poses multiple challenges associated with the operation when coexisting networks are present, such as WiFi. Previous coexistence analyses have been focused on the user-plane data-related transmissions and mainly based on abstract models. Meanwhile, the effects of the shared channel signaling defined by the standards have been mostly disregarded, particularly for ultra-dense scenarios. This paper assesses how the shared data channel signaling mechanisms influence the performance of the coexisting technologies operating unlicensed bands in indoor environments. Based on this analysis, some DRS signaling modifications are envisaged to additionally enhance the service provision and fairness towards WiFi in these scenarios.
Highlights
The rapid proliferation of user devices with access to mobile broadband, such as smartphones or tablets, represents a challenge for both the deployment and operation of new cellular networks
This paper presents the influence that sending such signaling has on the performance of both Licensed Assisted 3rd Generation Private Public Partnership (3GPP)-based technologes and Wireless fidelity (WiFi) and proposes a possible compensation modification that can serve as a basis for further designs of the 5G New Radio-Unlicensed (NR-U) standard
3 Signaling procedures for physical downlink shared channel In Licensed Assisted Access (LAA), the physical downlink shared data channel (PDSCH) has several signaling mechanisms controlled by specific signals such as Cell-specific Reference Signal (CRS) and Channel State Information Reference Signal (CSI-RS), which are used for coherent demodulation and channel estimation at User Equipment (UE) side, and the primary and secondary synchronization signals (PSS/SSS) to get synchronized to the base station [14]
Summary
The rapid proliferation of user devices with access to mobile broadband, such as smartphones or tablets, represents a challenge for both the deployment and operation of new cellular networks. The coexistence of WiFi and LAA has been widely explored in the literature both from an analytical point of view and at a simulation level In these works, two main options for a fair coexistence are presented: on the one hand, methods of communication between technologies that allow their cooperation in random access are suggested [5], and on the other hand, techniques for adapting channel access mechanisms based on contention (adaptive window modulation, Energy Detection Threshold, etc.) are proposed [6]. If ACK is not received correctly, the backoff period is increased exponentially
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callMore From: EURASIP Journal on Wireless Communications and Networking
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
