QUALCOMM Incorporated
Relaxed threshold for synchronous access in unlicensed spectrum

Abstract:

A relaxed threshold for synchronous access in unlicensed spectrum is disclosed. According to the aspects described herein, nodes accessing a shared communication spectrum using a local synchronous access mode may attempt access via a listen before talk (LBT) procedure using a local synchronous energy detection (ED) threshold. The local synchronous ED threshold is relaxed relative to a standard ED threshold otherwise used for access to the shared communication spectrum. The relaxed nature of the local synchronous ED threshold allows local synchronous access nodes a higher probability to gain access to the shared communication channel. To prevent interference with global synchronous access nodes, the global synchronous access nodes are also able to use the relaxed, local synchronous ED threshold as long as it ends the resulting channel occupancy time (COT) at the next local synchronization boundary.