Synchronization for low coverage machine type communication devices
US9713108B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 10, 2014 |
| Grant date | Jul 18, 2017 |
| Priority date | — |
| Expiry date | Jun 25, 2035 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04W4/70
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A method of fast synchronization for low coverage machine type communication (MTC) devices is proposed. A machine-specific synchronization signal “mSYNC” with higher density in time and frequency is transmitted from each base station for fast timing and frequency acquisition and tracking. The mSYNC has a relatively longer periodicity (i.e., >>5 ms) to reduce overhead and inter-cell interference. The higher time-frequency density of mSYNC is designed to improve latency and power consumption by allowing the machine to wake up just before the scheduled mSYNC transmission time and to re-synchronize or track synchronization with the network without the need for long averaging time.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.