Bypassing a portion of an ofdm / ofdma frame based on a...

H - Electricity – 04 – W

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H04W 52/02 (2009.01)

Patent

CA 2726685

Methods and systems for utilizing a multicast / broadcast connection identifier (CID) scheduling message in an orthogonal frequency-division multiplexing (OFDM) or orthogonal frequency division multiple access (OFDMA) frame in an effort to bypass at least a portion of the Media Access Control (MAC) protocol data unit (PDU) parsing of the frame are provided. By bypassing at least a portion of the MAC PDU parsing of the OFDM/OFDMA frame (which may be in accordance with one or more standards of the IEEE 802.16 family of standards), a particular user terminal need not spend a lot of overhead in the CID filtering process, determining which MAC PDUs are intended to be processed by the MAC of that particular user terminal. Furthermore, for certain embodiments, a user terminal may power down related circuitry during the terminal's bypassing time period(s) of the OFDM/OFDMA frame in an effort to save power.

L'invention concerne des procédés et des systèmes visant à utiliser un message de programmation didentifiant de connexion (connection identifier, CID) en multidiffusion / diffusion dans une trame de multiplexage par répartition orthogonale de la fréquence (OFDM) ou de multiplexage par répartition orthogonale de la fréquence à accès multiple (OFDMA) dans le but domettre au moins une partie de lanalyse de la trame par lunité de données de protocole (protocol data unit, PDU) de la commande d'accès au support physique (Media Access Control, MAC). En omettant au moins une partie de lanalyse de la trame OFDM/OFDMA par la PDU du MAC (ce qui peut se faire selon une ou plusieurs normes de la famille IEEE 802.16), un terminal dutilisateur donné naura pas à mobiliser dimportantes ressources, lors du processus de filtrage de CID, pour déterminer lesquelles des PDU de MAC sont à traiter par le MAC du terminal dutilisateur en question. En outre, dans certains modes de réalisation, un terminal dutilisateur peut couper lalimentation des circuits associés pendant la ou les périodes où le terminal omet la trame OFDM/OFDMA dans le but déconomiser de lénergie.

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