4 Background and introduction

25.2023GPP7.68 Mcps Time Division Duplex (TDD) optionOverall description: Stage 2Release 17TS

The 7.68Mcps TDD option is an evolution of the 3.84Mcps TDD option to a higher chip rate. There exists a great degree of commonality between the 3.84Mcps TDD option and the 7.68Mcps TDD option. Nevertheless, there are many aspects of the 7.68Mcps TDD option that require separate specification to the 3.84Mcps TDD option. The following aspects are specified at a high level in this document:

– Physical layer structure;

– Physical layer procedures;

– UE capabilities;

– Layer 2/3 protocol aspects;

– Iub / Iur aspects;

– Radio aspects;