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Method for performing deregistration with content retention mode in broadband wireless access system

  • US 9,155,059 B2
  • Filed: 01/07/2011
  • Issued: 10/06/2015
  • Est. Priority Date: 01/07/2010
  • Status: Expired due to Fees
First Claim
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1. A method for a mobile station to perform a Deregistration with Content Retention (DCR) mode respective to a request from a base station in a broadcast wireless access system, the method to perform the DCR mode comprises:

  • receiving a first broadcast message indicating an entry to the DCR mode from the base station;

    transmitting a second message requesting the DCR mode entry to the base station;

    receiving a third broadcast message including acknowledgement (ACK) information indicating whether or not the second message has been detected by the base station; and

    entering the DCR mode when the ACK information indicates a successful detection of the second message,wherein the second message corresponds to a message acknowledgement response (AAI MSG-ACK) message or a Quick Access Message being transmitted along with a bandwidth request (BR) preamble sequence, when the first broadcast message is transmitted along with a control extension header (MCEH) indicating a transmission of the second message, andwherein the second message corresponds to a deregistration request message having its deregistration request code assigned with a value of 0x04, when the first broadcast message is not accompanied with the control extension header.

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