WALTER STUART VENTERS
Pilots at Fagan Cir, Huntsville, AL
License number
Alabama A4800031
Category
Airmen
Type
Authorized Aircraft Instructor
Address
Address
1702 Fagan Cir SE, Huntsville, AL 35801
Professional information
Binary Decision Tree-Based Arbitrator For Packetized Communications
US Patent:
2002015, Oct 31, 2002
Filed:
Apr 30, 2001
Appl. No.:
09/845638
Inventors:
David Perkinson - Madison AL, US
Walter Venters - Huntsville AL, US
Walter Venters - Huntsville AL, US
Assignee:
Adtran, Inc. - Huntsville AL
International Classification:
H04L012/28
US Classification:
370/256000, 370/386000
Abstract:
A binary decision tree-based arbitration scheme executable by a control processor of a time division multiplex (TDM)-based communication system is operative to select the next packet to be transmitted from a plurality of virtual circuits, any number of which may have one or more packets awaiting transmission over a serialized digital communication link. The transmission priority scheme contains N+1 sets of nodes containing 2-1 nodes. A respective ith set of nodes comprises 2nodes, wherein i is greater than or equal to 1, and less than or equal to N+1. The nodes of a given set are connected to those of an adjacent set by binary-split branches. For each of the 2leaf nodes of the decision tree, information is stored representative of the transmission priority of a packet awaiting transmission from its associated communication port. In addition, associated with each node branching to respective pairs of downstream nodes (toward the virtual circuit ports) is a ‘pointer’ code that points to whichever one of its two branched nodes is associated with a higher packet transmission priority. As one traverses the decision tree along sequentially split branch paths from the highest priority leaf node toward the root node, the pointer code of the next immediately adjacent upstream node will always point to the node-branch path leading to the highest priority leaf node. Thus, the root node will point to the leaf node having the highest transmission priority.
Systems And Methods For Enabling Clock Signal Synchronization
US Patent:
7742505, Jun 22, 2010
Filed:
Dec 14, 2006
Appl. No.:
11/639401
Inventors:
Walter Stuart Venters - Huntsville AL, US
Troy Wayne White - Toney AL, US
Daniel Patrick Day - Huntsville AL, US
Richard Goodson - Huntsville AL, US
Troy Wayne White - Toney AL, US
Daniel Patrick Day - Huntsville AL, US
Richard Goodson - Huntsville AL, US
Assignee:
ADTRAN, Inc. - Huntsville AL
International Classification:
H04J 3/06
US Classification:
370503, 37039562
Abstract:
An interworking function (IWF) is coupled to a switch of a packet network and communicates with the network switch based on an Ethernet clock signal or some other type of clock signal. A primary reference clock (PRC) of the network generates a PRC signal, and a timing analyzer determines timing information indicative of timing relationships between the Ethernet clock signal and the PRC signal. The timing analyzer periodically transmits such timing information, and the IWF uses the timing information to generate a PRC signal that is traceable to the network PRC signal.