Patent · US Active

Wireless proximity estimation

US7948961B2 · kind B2 · utility

4Cited by

0References

26Claims

0Family size

Assignee

SiBEAM, Inc. · US

Inventors

Kumar Mahesh · San Ramon, US
Karthik Krishnaswami · San Jose, US
Karen Wang · Palo Alto, US
Jeffrey M. Gilbert · Palo Alto, US
Chuen-Shen Bernard Shung · San Jose, US
Chih-Yuan Hsieh · Chiayi, TW
Kyeong Ryu · Seoul, KR
Prakash Kamath · Santa Clara, US

Key dates

Filing date	Jan 25, 2008
Grant date	May 24, 2011
Priority date	—
Expiry date	Oct 12, 2029

Classification

Technology area (CPC H)Electricity
CPC primaryH04L63/10
WIPO fieldDigital communication
WIPO sectorElectrical engineering

Abstract

A wireless content protection system includes a coordinator, a source device, and a sink device. The coordinator includes a scheduler. The source and sink devices each have a content protection manager. One of the content protection manager allocates and releases bandwidth via the coordinator for a test message and a response message for a round-trip time computation. The test message is transmitted in a source-to-sink channel time block. The response message is transmitted in a sink-to-source channel time block. The round-trip time is the period between the end of the source-to-sink channel time block and the beginning of the sink-to-source channel time block.

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