H - Electricity – 04 – L
Patent
H - Electricity
04
L
H04L 25/03 (2006.01) H04B 7/06 (2006.01)
Patent
CA 2665212
Methods and apparatus are disclosed for generating and exchanging codebooks in a multiple access wireless communication system, such as Space Division Multiple Access (SDMA). The codebooks include a plurality of preferred precoding matrices. The codebooks are generated at an access network. Generating a codebook may further include generating a codebook identifier assigned by the access network. The codebooks are communicated to access terminals. Communicating the codebooks may further include querying the access terminals to determine an identity of codebooks currently stored at each access terminal, receiving a codebook status response from each of the access terminals indicating the identity of codebooks stored at each of the access terminals. The codebooks may also be assigned to access terminals for a predetermined sector in the active set of communication links. Generating a codebook may further include generating a codebook that includes identification of clusters. The clusters identify a set of the precoding matrices and, as such, a set of beams in the cluster. Thus, the clusters may identify a starting beam index and an ending beam index. The codebook may further include an overlap cluster map that indicates clusters authorized to potentially overlap.
L'invention concerne des procédés et un appareil destinés à générer et échanger des livres de codes dans un système de communication sans fil à accès multiple. Les livres de codes comprennent une pluralité de matrices de précodage préférées.
Prakash Rajat
Sarkar Sandip
Qualcomm Incorporated
Smart & Biggar
LandOfFree
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