发明名称 |
METHOD AND APPARATUS FOR SENDING FEEDBACK FOR A DOWNLINK SHARED SERVICE TRANSMITTED TO A PLURALITY OF WIRELESS TRANSMIT/RECEIVE UNITS |
摘要 |
<p>A wireless transmit/receive units (WTRUs) receives a downlink transmission from a Node-B and decodes the downlink transmission. If the decoding is not successful, the WTRU sends a pre-defined burst signifying a negative acknowledgement (NACK) to the Node-B via a contention-based shared feedback channel. The pre-defined burst may be sent only once without requiring an acknowledgement. The Node-B calibrates a downlink transmit power so that the downlink transmission is transmitted to the WTRUs with a high likelihood. The Node-B may send a downlink transmission including multiple data streams processed using different modulation and coding schemes so that a WTRU having a high signal quality decodes all data streams while a WTRU having a low signal quality decodes less than all data streams. The Node-B sends a channel quality indicator (CQI) threshold so that each WTRU determines a data stream to report feedback based on the CQI threshold and a measured CQI.</p> |
申请公布号 |
IL198176(D0) |
申请公布日期 |
2009.12.24 |
申请号 |
IL20090198176 |
申请日期 |
2009.04.16 |
申请人 |
INTERDIGITAL TECHNOLOGY CORPORATION |
发明人 |
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分类号 |
H04W4/06;H04W28/04;H04W52/14;H04W52/22;H04W52/24;H04W52/32 |
主分类号 |
H04W4/06 |
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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