Weida Dah Huang

US Patent:

20090185501, Jul 23, 2009

Filed:

Jan 17, 2008

Appl. No.:

12/015671

Inventors:

Weida Huang - Cupertino CA, US
Yongbum Kim - San Jose CA, US

International Classification:

H04L 12/26

US Classification:

370252

Abstract:

Aspects of a method and system for determination and exchange of network timing information are provided. In this regard, for each network hop traversed by a packet, a propagation delay of said network hop may be determined. Moreover, the propagation delay, and/or a hop length calculated utilizing the propagation delay, may be appended to the packet. The packet may, for example, be a MMRP registration packet or a SRP reservation packet. The packet may be dropped in instances that the propagation delay and/or length of a one or more traversed network hops is outside a determined range. The hop length may be determined by multiplying the propagation delay by a speed of propagation on the hop. The speed of propagation may be determined based on the physical layer technology associated with the network hop. Digital rights management may be implemented for media communicated on the network hop based at least in part on the hop length or the propagation delay. In this regard, use of media content may be restricted to a specified location.