发明名称 |
COOPERATIVE RELAY SYSTEM ENABLING SIMULTANEOUS BROADCAST-UNICAST OPERATION WITH EFFICIENT AUTOMATIC REPEAT REQUEST FUNCTIONALITY |
摘要 |
<p>A wireless node, such as a relay node, has different operating modes for unicast and broadcast/multicast subchannels. For unicast services the phase offsets of those relay nodes engaged in a cooperative transmission are optimized for the subchannels used for unicast services. Alternatively, when no feedback is available and an open loop MIMO or MIMO-type scheme is in use, retransmissions are performed in such a way that a destination (e.g., user terminal) receives effectively a distributed space-time block code. For the broadcast/multicast services time varying random phase offsets may be employed for the subchannels used for broadcast services. For reliable high data rate broadcast transmissions a cooperative retransmission scheme that effectively forms distributed space-time block codes may be used.</p> |
申请公布号 |
WO2009047660(A1) |
申请公布日期 |
2009.04.16 |
申请号 |
WO2008IB53668 |
申请日期 |
2008.09.11 |
申请人 |
NOKIA CORPORATION;NOKIA, INC.;HOTTINEN, ARI;DOPPLER, KLAUS, F. |
发明人 |
HOTTINEN, ARI;DOPPLER, KLAUS, F. |
分类号 |
H04B7/02;H04B7/155 |
主分类号 |
H04B7/02 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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