Multiple-input multiple-output (MIMO) transmission method and apparatus
First Claim
1. An uplink multiple-input multiple-output (MIMO) transmission method, comprising:
- sending, by a user equipment (UE), first data to a NodeB in a first process in a hybrid automatic repeat request round trip time (HARQ_RTT);
receiving, by the UE, an acknowledgement character related to the first data and returned by the NodeB; and
determining, by the UE according to the acknowledgement character and a rank value to be used for next transmission, data transmission of the first process in a next HARQ_RTT;
wherein the rank value to be used for next transmission comprises 1 or 2;
wherein, when the first data is first stream data, determining, by the UE according to the acknowledgement character and a rank value to be used for next transmission, data transmission of the first process in a next HARQ_RTT, comprises;
when the acknowledgement character indicates the first stream data is correct, and the rank value is 1, sending, by the UE, new first stream data in the first process in the next HARQ_RTT according to a single-stream transmission form corresponding to the rank value 1, and adopting a power offset newly scheduled in the first process; and
when the acknowledgement character indicates the first stream data is correct, and the rank value is 2, sending, by the UE, new first stream data and new second stream data in the first process in the next HARQ_RTT according to a double-stream transmission form corresponding to the rank value 2, and adopting a power offset newly scheduled in the first process.
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Abstract
Embodiments of the present invention disclose an uplink MIMO transmission method, including: sending, by a UE, first data to a base station (NodeB) in a first process in an HARQ_RTT, and receiving an acknowledgement character related to the first data and returned by the NodeB; and determining, by the UE according to the acknowledgement character and a rank value to be used for next transmission, data transmission of the first process in a next HARQ_RTT. The present invention further provides a corresponding user equipment and base station. Implementing the method and apparatus provided by the present invention can enable a UE to correctly perform HARQ transmission using MIMO, thereby effectively ensuring performance of MIMO.
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Citations
14 Claims
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1. An uplink multiple-input multiple-output (MIMO) transmission method, comprising:
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sending, by a user equipment (UE), first data to a NodeB in a first process in a hybrid automatic repeat request round trip time (HARQ_RTT); receiving, by the UE, an acknowledgement character related to the first data and returned by the NodeB; and determining, by the UE according to the acknowledgement character and a rank value to be used for next transmission, data transmission of the first process in a next HARQ_RTT; wherein the rank value to be used for next transmission comprises 1 or 2; wherein, when the first data is first stream data, determining, by the UE according to the acknowledgement character and a rank value to be used for next transmission, data transmission of the first process in a next HARQ_RTT, comprises; when the acknowledgement character indicates the first stream data is correct, and the rank value is 1, sending, by the UE, new first stream data in the first process in the next HARQ_RTT according to a single-stream transmission form corresponding to the rank value 1, and adopting a power offset newly scheduled in the first process; and when the acknowledgement character indicates the first stream data is correct, and the rank value is 2, sending, by the UE, new first stream data and new second stream data in the first process in the next HARQ_RTT according to a double-stream transmission form corresponding to the rank value 2, and adopting a power offset newly scheduled in the first process. - View Dependent Claims (2)
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3. An uplink multiple-input multiple-output (MIMO) transmission method, comprising:
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sending, by a user equipment (UE), first data to a NodeB in a first process in a hybrid automatic repeat request round trip time (HARQ_RTT); receiving, by the UE, an acknowledgement character related to the first data and returned by the NodeB; and determining, by the UE according to the acknowledgement character and a rank value to be used for next transmission, data transmission of the first process in a next HARQ_RTT; wherein the rank value to be used for next transmission comprises 1 or 2; wherein, when the first data is first stream data and second stream data, determining, by the UE according to the acknowledgement character and a rank value to be used for next transmission, data transmission of the first process in a next HARQ_RTT, comprises; when the acknowledgement character indicates the first stream data and the second stream data are both correct, and the rank value is 1, sending, by the UE, new first stream data in the first process in the next HARQ_RTT according to a single-stream transmission form corresponding to the rank value 1, and adopting a power offset newly scheduled in the first process; and when the acknowledgement character indicates the first stream data and the second stream data are both correct, and the rank value is 2, sending, by the UE, new first stream data and new second stream data in the first process in the next HARQ_RTT according to a double-stream transmission form corresponding to the rank value 2, and adopting a power offset newly scheduled in the first process. - View Dependent Claims (4, 5, 6, 7)
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8. A user equipment, comprising:
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a processing device comprising at least one processor; and memory coupled to the processing device, the memory comprising instructions that, when executed by the processing device, cause the user equipment to; send first data to a NodeB in a first process in a hybrid automatic repeat request round trip time (HARQ_RTT), and receive an acknowledgement character related to the first data and returned by the NodeB; and determine, according to the acknowledgement character and a rank value to be used for next transmission, data transmission of the first process in a next HARQ_RTT; wherein the rank value to be used for next transmission comprises 1 or 2; wherein, when the first data is first stream data, the memory comprises instructions that, when executed by the processing device, cause the user equipment to; when the acknowledgement character indicates the first stream data is correct, and the rank value is 1, send new first stream data in the first process in the next HARQ_RTT according to a single-stream transmission form corresponding to the rank value 1, and adopt a power offset newly scheduled in the first process; and when the acknowledgement character indicates the first stream data is correct, and the rank value is 2, send new first stream data and new second stream data in the first process in the next HARQ_RTT according to a double-stream transmission form corresponding to the rank value 2, and adopt a power offset newly scheduled in the first process. - View Dependent Claims (9)
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10. A user equipment, comprising:
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a processing device comprising at least one processor; and memory coupled to the processing device, the memory comprising instructions that, when executed by the processing device, cause the user equipment to; send first data to a NodeB in a first process in a hybrid automatic repeat request round trip time (HARQ_RTT), and receive an acknowledgement character related to the first data and returned by the NodeB; and determine, according to the acknowledgement character and a rank value to be used for next transmission, data transmission of the first process in a next HARQ_RTT, wherein the rank value to be used for next transmission comprises 1 or 2; wherein, when the first data is first stream data and second stream data, the memory comprises instructions that, when executed by the processing device, cause the user equipment to; when the acknowledgement character indicates the first stream data and the second stream data are both correct, and the rank value is 1, send new first stream data in the first process in the next HARQ_RTT according to a single-stream transmission form corresponding to the rank value 1, and adopt a power offset newly scheduled in the first process; and when the acknowledgement character indicates the first stream data and the second stream data are both correct, and the rank value is 2, send new first stream data and new second stream data in the first process in the next HARQ_RTT according to a double-stream transmission form corresponding to the rank value 2, and adopt a power offset newly scheduled in the first process. - View Dependent Claims (11, 12, 13, 14)
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Specification