Patent · US Active

MAC layer timestamping approach for emerging wireless sensor platform and communication architecture

US8102787B2 · kind B2 · utility

4Cited by
5References
20Claims
0Family size

Assignee

Inventors

Key dates

Filing dateJun 17, 2008
Grant dateJan 24, 2012
Priority date—
Expiry dateOct 3, 2030

Classification

  • Technology area (CPC H)Electricity
  • CPC primaryH04J3/0697
  • WIPO fieldTelecommunications
  • WIPO sectorElectrical engineering

Abstract

In the receiving side MAC layer timestamping approach, the MPDU structure is changed by adding an extra timestamping field. When a MPDU packet is generated, a captured receiving timestamp is written into the MPDU's timestamp field. The MPDU packet is then forwarded from the PHY to the MAC layer of the wireless sensor node. In the MAC layer, the receiving timestamp is further processed and inserted into a corresponding field of the time synchronization message, which is in turn transmitted to a Time Synchronization module. In the sending side MAC layer timestamping approach, the sending timestamp is captured immediately before the time synchronization message is written into TxFIFO.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.