The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 30, 2004
Filed:
Sep. 11, 1998
Todd Sutton, San Diego, CA (US);
Houtan Dehesh, Encinitas, CA (US);
Jan K. Wegrzyn, San Diego, CA (US);
Roy G. Moss, San Diego, CA (US);
Juan Faus, San Diego, CA (US);
David T. Clapp, Borrego Springs, CA (US);
Qualcomm Incorporated, San Diego, CA (US);
Abstract
A loopback processing method includes detecting a loopback at a first entity in a wide area network. The detection is accomplished by recognizing that a “memorized” frame has returned on the same communications interface within a given period of time. The time interval between sending the frame and detecting it returning at the same port may be recorded and sent to an operator to provide information on the relative location of the loopback in the network. A loopback detect sequence is sent from the first entity to a second entity on the communications interface in loopback. Because of the loopback, both entities receive the loopback detect sequence. Either or both entities may inform a network operator of the loopback. The first entity has stopped using the link in loopback for real data, instead sending the loopback detect sequence. The second entity, upon detecting the loopback detect sequence, also stops using the link for real data. When the first entity stops detecting the loopback detect sequence returning on the link, the first entity stops sending the loopback detect sequence and begins using the link for real data again. When the second entity stops receiving the loopback detect sequence on the link, the second entity begins using the link for real data again. Either or both entities may inform a network operator that the loopback is gone.