Inventors:
Jeffrey A. Budney - Morris Plains NJ, US
Colin Mangler - Easton PA, US
Assignee:
Cellco Partnership - Bedminster NJ
International Classification:
H04Q 7/20
US Classification:
4554561, 4554042, 34235709
Abstract:
Failures in a message exchange, during a procedure for determining the location of a mobile station, are alleviated by providing a retry mechanism. Upon receipt of a particular failure message, such as the SMS Cause Code , rather than abort the location operation, the node receiving the failure message retransmits its last previous message. In an Assisted GPS (AGPS) example, essentially, whenever the Position Determining Entity (PDE) receives an SMS Cause Code from the mobile switching center (MSC) , it will resend the last previous Invoke message, without delay or alteration. This will give MSC another chance to deliver the message to the mobile station and ideally continue the message flow until the mobile station has been successfully located. The PDE may retry a particular Invoke message one or multiple times. The receipt of other SMSCauseCode values may still cause the message exchange to abort.