Advancement: D. Cirimelli-Low - Intelligent Channel Access Protocols for Wireless Networks

In a wireless network, concurrent transmissions from multiple sources may result in multiple access interference (MAI) at receiving nodes. A medium access control (MAC) protocol is used by devices to determine how to access a shared communication medium (channel) to minimize MAI. The vast majority of wireless networks today use MAC protocols based on contention, in which nodes randomly access the channel but behave more passively if they perceive a high level of contention in the network. Such approaches are simple to implement due to the small amount of local state information needed to operate; however, this class of protocols cannot maximally utilize channel resources.

The key contribution of the proposed thesis is a family of novel, intelligent MAC protocols that make use of neighborhood- and network-wide coordination, as well as feedback from all layers of the network stack, to organize channel access in a highly efficient manner. In this talk, I will present techniques for generating collision-free, distributed transmission schedules in fully-connected, mesh, and ad-hoc wireless networks. A major finding of this research is that the overhead needed to introduce meaningful collaboration between nodes is significantly smaller than the control packets used by most contention-based protocols. Future work in this research effort includes extending the techniques developed to date to support energy conservation for IoT deployments and the organization of nodes operating in multi-channel networks like those used in the recently ratified 802.11ax (OFDMA) WiFi standard.

Presenter: Dylan Cirimelli-Low, PhD Student, Computer Science & Engineering

Advisor: J.J. Garcia-Luna-Aceves 

 

Dial-In Information

Zoom - https://ucsc.zoom.us/j/95278011849?pwd=ZklFVXY3SlVDT2p0ZG9KbUtxSGtGZz09

Passcode: 480857

Friday, January 27, 2023 at 9:00am to 10:00am

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