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:
Sep. 10, 2013
Filed:
Jul. 05, 2005
Wenli Cao, Shenzhen, CN;
Wenli Cao, Shenzhen, CN;
ZTE Corporation, Shenzhen, Guangdong, CN;
Abstract
A method for preventing IP address from unexpected dispersion when using point-to-point protocol is disclosed. The method comprises the steps: starting and initializing a PPP session; performing a PPP LCP negotiation, in which times of the successful PPP LCP negotiation is limited; performing a PPP authentication, in which an authentication request to AAA client is sent only once; performing a PPP IPCP negotiation, in which an accounting-start request is sent only once and times of the successful PPP IPCP negotiation is limited; and terminating the PPP session and releasing the IP address. The method of the invention for preventing IP address from unexpected dispersion when using point-to-point protocol effectively avoid excessive oscillation of a LCP state machine and a IPCP state machine by limiting times of the successful PPP LCP negotiation during the period of PPP LCP negotiation and times of the successful PPP IPCP negotiation. In the meantime, the method the invention effectively solves the problem of IP address unexpected dispersion by sending an authentication request to an AAA client only once during the PPP authentication phase and ensuring that the PPP session sends an accounting-start request only once.