Channel structure for a cellular internet of things system

摘要

Methods, systems, and devices are described for wireless communication at a user equipment (UE). A UE may synchronize with a cell using a waveform known to the UE beforehand, and common to a group of cells. The UE may determine a physical broadcast channel (PBCH) time. The UE may receive the PBCH and determine a physical layer identification (ID) for the cell and a frequency for uplink transmissions. The PBCH may also indicate a channel configuration, which may enable the UE to perform a random access procedure. The channel configuration may include a time/frequency resource configuration of a shared traffic channel. In some cases, the UE may determine resources for data transmission based on an index of a control channel transmission. In some cases, there may be a predetermined delay between control channel transmissions and data channel transmissions. The UE may then enter a low power state during the delay.

主权项

1. A method of wireless communication at a user equipment (UE), comprising:
receiving a first synchronization signal from a first cell on a common synchronization channel of the first cell, wherein the first synchronization signal is a waveform known to the UE prior to receiving the first synchronization signal; estimating a symbol time of the first synchronization signal; determining a physical broadcast channel (PBCH) symbol time of the first cell based on the estimated symbol time of the first synchronization signal; receiving a PBCH signal based at least in part on the PBCH symbol time; and determining a physical layer identification (ID) of the first cell based on the received PBCH signal.