发明名称 |
Method and arrangement in a telecommunication system |
摘要 |
A method in a terminal for providing an ACK/NAK message to a base station is provided. The terminal counts the number of assigned downlink subframes detected from the base station resulting in k. The terminal then establishes whether each of a number of transport blocks comprised in the counted k downlink subframes is correctly received or not. In the case when each one of the transport blocks, comprised in the k downlink subframes is estimated as correctly received the terminal provides to the base station an encoded ACK message for the k subframes, which comprises k, the number of subframes. |
申请公布号 |
US8867384(B2) |
申请公布日期 |
2014.10.21 |
申请号 |
US200813002144 |
申请日期 |
2008.12.09 |
申请人 |
Telefonaktiebolaget LM Ericsson (publ) |
发明人 |
Astely David;Hu Yang;Larsson Daniel;Wan Lei |
分类号 |
H04L12/26;H04W4/00;H04L1/16;H04L1/18;H04L27/34 |
主分类号 |
H04L12/26 |
代理机构 |
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代理人 |
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主权项 |
1. A method in a terminal for providing an acknowledgement/not-acknowledgement (ACK/NAK) message to a base station, the base station and the terminal in a telecommunication system, the method comprising:
receiving downlink subframes from the base station; counting a number of downlink assignments detected in received downlink subframes to k; establishing whether each of a number of transport blocks in the downlink subframes in which a downlink assignment is detected is correctly received or not; when each of the transport blocks in the downlink subframes in which a downlink assignment is detected is estimated as correctly received, providing to the base station an encoded ACK message for the k downlink assignments, which encoded ACK message comprises k, the number of number of detected downlink assignments; obtaining in each subframe a downlink assignment index (DAI) from the base station, the DAI representing a number of previous downlink assignments; establishing if any downlink assignment transmitted by the base station has been missed in any downlink subframe in which a downlink assignment has been detected, and comparing the number of received downlink assignments with the DAI to determine if any previous downlink assignment has been missed; when a downlink assignment transmitted by the base station has been established to have been missed, providing to the base station one encoded NAK message that is modulated into a constellation point different from a constellation point into which the encoded ACK message would have been modulated; and when any transport block in the k downlink subframes is estimated as not correctly received, providing to the base station one encoded NAK message for the k downlink assignments bundled,
wherein the encoded ACK message is modulated such that a constellation point is selected depending on k, the number of downlink assignments being acknowledged, and the encoded NAK message is modulated into a constellation point that is different from the constellation point into which the ACK message would have been modulated. |
地址 |
Stockholm SE |