2016/06 99 p.
Potential gains like reduced response time and improved TCP throughput due to latency improvements on typical
applications and use cases are identified and documented. In this evaluation, latency reductions due to protocol
enhancements as well as shortened TTIs are assumed. Specifically, the following items should apply:
Consider the web application (HTTP/FTP+TCP) use case and analyse the possible gains in the performance
metrics of delay and perceived data rate for TCP based data transactions.
Consider real-time application use case and analyse the possible gains in delay, service coverage and system
Aspects of complexity, energy-consumption, signalling overhead and resource efficiency should be considered.
The evaluations include active UEs and UEs that have been inactive a longer time, but are kept in RRC Connected.
Reducing user plane latency for the scheduled UL transmission with resource efficient solution as a result of protocol
and signalling enhancements are studied and compared to the pre-scheduling solutions allowed by the standard today.
Specification impact, feasibility and performance of TTI lengths between 0.5ms and one OFDM symbol are studied,
taking into account impact on e.g. L2 overhead, reference signals and physical layer control signalling.
Backwards compatibility shall be preserved, i.e. solutions should allow normal operation of pre-Rel 13 UEs on the same
full Table of Contents for TR 36.881 Word version: 14.0.0