Invention Grant
- Patent Title: Multi-carrier operation in data transmission systems
- Patent Title (中): 数据传输系统中的多载波操作
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Application No.: US11398803Application Date: 2006-04-05
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Publication No.: US07961700B2Publication Date: 2011-06-14
- Inventor: Durga Prasad Malladi , Serge D. Willenegger , Juan Montojo
- Applicant: Durga Prasad Malladi , Serge D. Willenegger , Juan Montojo
- Applicant Address: US CA San Diego
- Assignee: QUALCOMM Incorporated
- Current Assignee: QUALCOMM Incorporated
- Current Assignee Address: US CA San Diego
- Agent Rupit M. Patel
- Main IPC: H04J3/00
- IPC: H04J3/00

Abstract:
Multi-carrier point-to-multi-point CDMA system implementation reduces hardware changes in legacy single-carrier systems. The number of common downlink channels, such as timing/synchronization and paging channels, is reduced by designating an anchor carrier for transmitting these channels. Procedures for adding carriers and carrier acquisition are simplified through common carrier timing, signaling by the network to the user equipment (UE) of timing offsets and scrambling code selection, and other measures. Channel reuse is employed to minimize changes in asymmetric systems with different numbers of uplink and downlink carriers. Channel Quality Indicator (CQI) field is divided into multiple subfields to enable transmission of multiple CQIs and ACK/NACK indicators on one uplink carrier. Joint and separate scheduling schemes are shown for concurrent scheduling of a data stream transmission to a UE via multiple downlink carriers.
Public/Granted literature
- US20060274712A1 Multi-carrier operation in data transmission systems Public/Granted day:2006-12-07
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