Abstract: An asymmetric and asynchronous energy conservation protocol for vehicular networks is provided. In one aspect, an a-quorum may be defined for one or more members for the one or more members to establish asymmetric links to contact the cluster head. An s-quorum for the cluster head to establish symmetric link between the cluster heads and relays may be defined.
Type:
Grant
Filed:
May 15, 2009
Date of Patent:
April 23, 2013
Assignee:
Telcordia Applied Research Center Taiwan, Co.
Abstract: In a Vehicular Ad Hoc Network (VANET) a hybrid method combines SDMA (Space Division Multiple Access) and dynamic TDMA (Time Division Multiple Access) that divides the roadway into regions (whose size is larger than the SDMA unit) where each region is allocated a pool of radio channels based on SDMA and may contain a limited number of vehicles. Vehicles within the same region compete for and access the channels using dynamic TDMA. A channel allocation scheme that maps the pool of channels to the regions such that when a vehicle acquires multiple channels (time slots) in a region, the intervals among the channels are as uniform as possible, thus minimizing the waiting time of the messages to be broadcast by the vehicle, which is critical for safety related applications. This solution is referred to as R-SDMA (Region based SDMA).
Type:
Application
Filed:
May 18, 2011
Publication date:
May 17, 2012
Applicant:
TELCORDIA APPLIED RESEARCH CENTER TAIWAN CO.
Inventors:
Chung-Min Chen, Yen-Cheng Lai, Wanjiun Liao, Phone Lin
Abstract: Peer-to-peer mobility management in heterogeneous IP networks provides a peer-to-peer mobility module operable to intercept a data packet received at a communication protocol layer of an Internet Protocol communication stack. A translation table may be stored on memory device. The translation table stores real address of one or more network interfaces and a corresponding virtual address. The peer-to-peer mobility module may be further operable to modify the intercepted data packet using the real address and virtual address stored on the translation table.
Type:
Application
Filed:
May 15, 2009
Publication date:
November 18, 2010
Applicants:
TELCORDIA APPLIED RESEARCH CENTER TAIWAN CO., TELCORDIA TECHNOLOGIES, INC.
Inventors:
Yuan-Ying Hsu, Tao Zhang, Chung-Min Chen
Abstract: An asymmetric and asynchronous energy conservation protocol for vehicular networks is provided. In one aspect, an a-quorum may be defined for one or more members for the one or more members to establish asymmetric links to contact the cluster head. An s-quorum for the cluster head to establish symmetric link between the cluster heads and relays may be defined.
Type:
Application
Filed:
May 15, 2009
Publication date:
November 18, 2010
Applicant:
TELCORDIA APPLIED RESEARCH CENTER TAIWAN CO.