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System and method for reducing call establishment delay in a wireless network

  • US 7,620,412 B2
  • Filed: 11/22/2005
  • Issued: 11/17/2009
  • Est. Priority Date: 07/25/2005
  • Status: Active Grant
First Claim
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1. A method for reducing call establishment delay in a wireless network, which is used in a network node to call a wireless terminal covered by a wireless network access point/base station through a Session Initiation Protocol (SIP) server, the method comprising:

  • a listen interval notifying step, which uses the wireless terminal to notify the SIP server of a listen interval;

    a listen time determining step, which uses the SIP server to obtain a listen time according to the listen interval, so that the SIP server is aware of when the wireless terminal subsequently wakes up and listens to the wireless network access point/base station; and

    a connection request sending step, which uses the SIP server to dynamically determine a time to send a connection request to the wireless terminal.

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