The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 22, 2013
Filed:
Dec. 28, 2010
Jianlin Guo, Newton, MA (US);
Raymond Yim, Cambridge, MA (US);
Jinyun Zhang, Cambridge, MA (US);
Philip V. Orlik, Cambridge, MA (US);
Chunjie Duan, Brookline, MA (US);
Frederick J Igo, Jr., Ayer, MA (US);
Jianlin Guo, Newton, MA (US);
Raymond Yim, Cambridge, MA (US);
Jinyun Zhang, Cambridge, MA (US);
Philip V. Orlik, Cambridge, MA (US);
Chunjie Duan, Brookline, MA (US);
Frederick J Igo, Jr., Ayer, MA (US);
Mitsubishi Electric Research Laboratories, Inc., Cambridge, MA (US);
Abstract
A hybrid communication network for a transportation safety system includes a fixed wired nodes and mobile wireless nodes. Because the wired nodes operate independently packets transmitted by the wired nodes to the wireless nodes need to be synchronized. A downlink travel time for downlink packets traveling from a controller to the wireless nodes is determined. Then, the controller schedules downlink data intervals (DDI) based on the downlink travel time; and transmits downlink packets to the wireless nodes during the DDI, such that a latency requirement of the transportation safety system is satisfied.