CHRISTOPHER GORDON MCHARG
Pilots at Walnut Dr, Winfield, IL

5388238, Feb 7, 1995

Jul 24, 1992

7/919462

Christopher G. McHarg - Winfield IL
Kenneth N. Schaff - Warrenville IL

AT&T Corp. - Murray Hill NJ

G06F 1200, H04Q 1104, G11C 1900, G11C 2100

395425

A system and method are described for enforcing the validity of circulating pointers stored in a pointer FIFO (first-in-first-out) memory. One or more target pointers are generated and compared to circulating pointers. If a pointer does not circulate through the system within a pre-specified time, then a pointer has been lost and an error is reported. If a circulating pointer matches a target pointer, it is suppressed by being removed from the set of circulating pointers. Another timer is then set to determine whether further circulating pointers match a target pointer. If so, then multiple pointers to the same location are present and all duplicate pointers are suppressed. After expiration of the second time, the target pointers are added to the set of circulation pointers. This process repeats with new target pointers, so that the validity of the set of circulating pointers is verified.

7251267, Jul 31, 2007

Dec 13, 2002

10/319191

Jignesh S. Panchal - Scotch Plains NJ, US
Christopher G. McHarg - Winfield IL, US

Lucent Technologies Inc. - Murray Hill NJ

H04B 1/00

375148, 375316, 375147, 455 39, 455500

A system and method for determining a round trip delay (RTD) indicator for mobile telephone signals originating from a mobile unit and received at a plurality of base stations in a wireless telecommunications system comprising at least some base stations using rake receivers, each rake receiver comprising a plurality of fingers. The method includes the steps of: collecting one or more finger characteristics from one or more rake receiver fingers assigned to one or more multi-path components of a signal; determining a finger lock category for at least one of the assigned one or more rake receiver fingers using the collected one or more finger characteristics; selecting a rake receiver finger from the one ore more rake receiver fingers using the determined finger lock categories, wherein the selected rake receiver finger has an associated RTD; and recording the RTD indicator corresponding to the selected finger. The system includes a processor configured to perform the foregoing steps.

5291482, Mar 1, 1994

Jul 24, 1992

7/919461

Christopher G. McHarg - Winfield IL
Thomas E. Newman - Wheaton IL
Kenneth N. Schaff - Warrenville IL
Kenneth E. Wendland - St. Charles IL

AT&T Bell Laboratories - Murray Hill NJ

H04L 1256

370 60

A fast packet switch comprising one buffer directly connected between a plurality of input ports and a plurality of output ports to effect rapid throughput of data packets. A pointer to a location in the buffer is allocated by a buffer manager upon receipt of notification of an incoming packet at the receiving input port and the input port delivers the packet as it is received to the location designated by the pointer. After the data packet is received, the input port delivers the pointer and a destination address for the packet to a router, which selects one of the plurality of output ports based on the destination address. The router queues the pointer in a queue for the selected output port. The output port then retrieves the data packet from the buffer using the pointer to determine the location, and transmits the data packet. After the transmission is complete, the output port returns the pointer to the buffer manager.