United States Patent 8,023,463
Dick , et al. September 20, 2011
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Enhanced uplink operation in soft handover
Abstract
A method and system for an enhanced uplink (EU) operation in a wireless communication system during soft handover. The system comprises a wireless transmit/receive unit (WTRU), at least two Node-Bs, and a radio network controller (RNC). One Node-B may be designated as a primary Node-B, and the primary Node-B may control EU operation during soft handover including uplink scheduling and hybrid automatic repeat request (H-ARQ). Soft buffer corruption is avoided during soft handover by controlling H-ARQ by the primary Node-B. Alternatively, an RNC may control EU operation during soft handover including H-ARQ. In this case, an RNC generates final acknowledge/non-acknowledge (ACK/NACK) decision based on the error check results of the Node-Bs.
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Inventors: Dick; Stephen G. (Nesconset, NY), Terry; Stephen E. (Northport, NY), Zhang; Guodong (Farmingdale, NY), Miller; James M. (Verona, NJ), Shin; Sung-Hyuk (Northvale, NJ)
Assignee: InterDigital Technology Corporation (Wilmington, DE)
Appl. No.: 10/925,426
Filed: August 25, 2004
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Related U.S. Patent Documents
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Application Number Filing Date Patent Number Issue Date
60497747 Aug., 2003
60507554 Oct., 2003
60508797 Oct., 2003
60520207 Nov., 2003
60585174 Jul., 2004
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Current U.S. Class: 370/331 ; 455/442; 714/746
Current International Class: G06F 11/30 (20060101); H04W 4/00 (20090101); H04W 36/00 (20090101)
Field of Search: 370/216,218,329,330,331,332,278,282,279,328,442,333,351,412,221,225 711/154 455/436,439,438,442,426 714/748,749,746,751,758,764
PPP
