Apparatus and method for allocating channel using OVSF code...

Details Apparatus and method for allocating channel using OVSF code... Apparatus and method for allocating channel using OVSF code...

2005-04-26

2005-04-26

Cangialosi, Salvatore (Department: 3621)

Multiplex communications

Communication over free space

Combining or distributing information via code word channels...

C375S141000

Reexamination Certificate

active

06885653

ABSTRACT:
Disclosed is a channel allocation method in a CDMA communication system. The method comprises receiving from a UTRAN one SF node CSF,kout of 2m−1SF nodes (where m is an integer larger than 3) arranged in the form of a tree having a mother node and child nodes; searching a group including the received SF node CSF,kin accordance with Formula (1) below; spreading a signal on a dedicated physical data channel (DPDCH) with an OVSF code corresponding to a selected one of the received SF node and its child nodes in the searched group; and spreading a signal on a dedicated physical control channel (DPCCH) with an OVSF code corresponding to an SF node determined by Formula (2) below based on the received SF node.For⁢ ⁢SF≤2m-14,(P1·SF,P1·k)=(2m-14,n)⁢⁢For⁢ ⁢SF>2m-14,(P2·2m-14,P2·n)=(SF,k)⁢⁢where,P1=2m-14·SF⁢ ⁢and⁢ ⁢P2=4·SF2m-1.Formula (1)F⁡(C2m-14·k)=C2m-1⁢2m-1-k-1⁢ ⁢(k=0,1,…⁢ )⁢⁢F⁡(C2m-14·k)=C2m-1,2m-1-(k-32)⁢ ⁢(k=0,1,…⁢ ).Formula  (2)

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