METHOD AND APPARATUS OF GLOBAL FRAME COUNTING FOR SYNCHRONIZATION IN SLEEP MODE OF BROADBAND WIRELESS ACCESS SYSTEM

A method and an apparatus of a global frame counting for synchronization in the sleep mode of a broadband wireless access system is provided to reduce a time taken to get into the sleep mode in OFDMA(Orthogonal Frequency Division Multiple Access) based system. An apparatus of a global frame counting...

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Bibliographic Details
Main Authors LEE, HO SEUNG, LIM, IN CHUN, SONG, BONG GEE
Format Patent
LanguageEnglish
Published 10.01.2008
Subjects
ELECTRIC COMMUNICATION TECHNIQUE
ELECTRICITY
TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHICCOMMUNICATION
WIRELESS COMMUNICATIONS NETWORKS
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Summary:A method and an apparatus of a global frame counting for synchronization in the sleep mode of a broadband wireless access system is provided to reduce a time taken to get into the sleep mode in OFDMA(Orthogonal Frequency Division Multiple Access) based system. An apparatus of a global frame counting for synchronization in the sleep mode of a broadband wireless access system includes a sleep controller(315), a VIC(Vectored Interrupt Controller)(305), a synchronization controller(325), and a clock generator(320). The sleep controller counts with low frequency clock. If the counting result is same with a sleep cycle from a CPU(330), the sleep controller transmits interrupt to the VIC to wake the CPU from sleep mode and transmits frame count result in Modulo 5ms with low frequency clock until a terminal wakes up. The synchronization controller controls each module and maintains synchronous through Modulo 5ms frame counting. The clock generator provides each module with a frequency clock required for each module.
Bibliography:Application Number: KR20060063650