Cheng Xuan Yang

US Patent:

58965734, Apr 20, 1999

Filed:

Apr 14, 1997

Appl. No.:

8/843186

Inventors:

Cheng Yang - Plano TX
David W. Matula - Dallas TX

Assignee:

Southern Methodist University - Dallas TX

International Classification:

H04Q 720

US Classification:

455453

Abstract:

Cellular communication systems supporting high utilization geographic regions having extensive cell overlap segments that collectively contain a substantial portion of the mobile units. A system and method for channel assignments incorporating selection from alternative transceivers defining overlapping cells is provided with load balancing to reduce call blocking. The system incorporates selective multiple handoffs responsive to channel assignment requests both to extend load balancing and also to substantially avoid call cutoff when active mobile units cross cell boundaries into possibly saturated cells.

US Patent:

56339151, May 27, 1997

Filed:

May 16, 1995

Appl. No.:

8/442336

Inventors:

Cheng Yang - Plano TX
David W. Matula - Dallas TX

Assignee:

Southern Methodist University - Dallas TX

International Classification:

H04Q 722

US Classification:

379 60

Abstract:

A multiple-layered cellular communication system particularly adapted to mobile phones and LAN type communication is provided with an overlaid arrangement of cell transceivers. By having this overlay, multiple service providers can provide a cooperative method of load sharing. The usage of the frequency spectrum can be improved and an advanced hand-off arrangement can be used to prevent or reduce the possibility of blocked calls due to cell saturation.

US Patent:

53769015, Dec 27, 1994

Filed:

May 28, 1993

Appl. No.:

8/069063

Inventors:

Steven S. Chan - Alhambra CA
Victor J. Watson - Rancho Palos Verdes CA
Cheng C. Yang - Torrance CA
Stuart Kam - Torrance CA

Assignee:

TRW Inc. - Redondo Beach CA

International Classification:

H03H 738

US Classification:

333 33

Abstract:

A hermetically sealable millimeter waveguide launch transition feedthrough for channelling high frequency electrical signals in a circuit which includes at least one waveguide. An aperture is formed in one wall of the waveguide and a conductive pin passes through the aperture. The pin is sealed therein by a dielectric material which surrounds the pin so as to isolate it from the waveguide wall. A probe head is disposed at one end of the conductive pin and within the waveguide. The opposite end of the pin contains a second probe head or other circuit connector. The transition may be effectively implemented in waveguide-to-waveguide or waveguide-to-device applications as well as in colinear device housing applications.