Reliability enhancement for LTE using MPQUIC in a mixed traffic scenario: A novel MPQUIC Selective Redundant Scheduling implementation

Markmøller, Christian ; Mogensen, Rasmus Suhr

4. term

Networks and Distributed Systems, Master

2018

2018-06-07

108 pages

Research and development of devices with high level of automation and flexibility are becoming more widespread. Especially self-driving vehicles have gained huge momentum in recent years and as a part of this trend, the research into vehicular communication has gained momentum. Some modules require that the communication must be reliable with certain delivery threshold. This report investigates the possibility of using transport layer multi-connectivity with LTE as an access technology in a mixed traffic scenario, to facilitate such communication. During the investigation it is deemed that state of the art protocols such as MPTCP and the newly developed MPQUIC is not suitable for such a scenario, as its standard scheduling mechanisms cannot facilitate reliable transmissions in a mixed traffic application. However, MPQUIC offers a good basis for a protocol that can handle such scenarios. We extend the functionality of MPQUIC with a novel Selective Redundant Scheduler (SRE) that can schedule an application data source redundantly if needed. The initial testing in environments with packet loss or varying delay behavior, based on real LTE measurements, shows that the novel SRE scheme offers much better reliability than the standard schedulers in MPQUIC and much better bandwidth efficiency than a fully redundant scheduler. An IPR has been spawned based on this novel solution.

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