Invention Grant
- Patent Title: Efficient multi-cast broadcasting for packet data systems
- Patent Title (中): 用于分组数据系统的高效多播广播
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Application No.: US10968520Application Date: 2004-10-18
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Publication No.: US08098607B2Publication Date: 2012-01-17
- Inventor: Stein A. Lundby
- Applicant: Stein A. Lundby
- Applicant Address: US CA San Diego
- Assignee: QUALCOMM Incorporated
- Current Assignee: QUALCOMM Incorporated
- Current Assignee Address: US CA San Diego
- Agent Won Tae Kim
- Main IPC: H04W4/06
- IPC: H04W4/06 ; H04H20/00 ; H04L12/18

Abstract:
Methods and apparatus are presented for efficient broadcasting in wireless packet data systems. A single MAC_ID is used for broadcasting to a group of subscribers. By using the channel quality information of the group of subscribers, a base station determines the identity of the subscriber with the worst channel conditions. The timing and the transmission format of the multi-cast are then tailored so that the subscriber with the worst channel conditions is capable of recovering the transmission. If the timing and the transmission format is chosen in relation to subscriber with the worst channel conditions, it is probable that other subscribers will be able to recover the transmission as well. Hence, only a single MAC_ID need to be used to make a single broadcast, rather than sending multiple transmissions to multiple subscribers.
Public/Granted literature
- US20050053069A1 Efficient multi-cast broadcasting for packaet data systems Public/Granted day:2005-03-10
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