Patent ID: 9155059
Filing Date: 2015-10-06
Classification: H04W

Abstract:
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, and wherein 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.