Downlink self-adapting method

A downlink and self-adaptive technology, applied in radio/inductive link selection arrangements, transmission control/equalization, selection devices, etc., can solve problems such as unseen downlink self-adaptive implementation methods
CN101296009AInactive Publication Date: 2008-10-29GLOBAL INNOVATION AGGREGATORS LLC
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
GLOBAL INNOVATION AGGREGATORS LLC
Publication Date
2008-10-29
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention provides a downlink self-adaptive method; wherein, a resource block group (RBG) corresponding to a sub-band channel quality indicator (CQI) of good quality is used for sending data scheduled to UE. When the RBG corresponding to the sub-band CQI does not meet the requirement of data amount, the RBGs corresponding to the sub-band CQI and a part of broad band CQI are jointly used for sending the data scheduled to the UE; however, when both the RBG corresponding to the sub-bond CQI and the RBG corresponding to the broad band CQI do not meet the requirement of the data amount, the sub-band CQI and all RBGs corresponding to the broad band CQI are used for sending a part of the data scheduled to the UE. Furthermore, when the TBz can be sent by the RBG corresponding to the sub-bond CQI is less than the TBz can be sent by the RBG corresponding to the broad band CQI, the RBG corresponding to the sub-bond CQI is used for sending the data scheduled to the UE. Under the feedback of UE selective sub-band CQI, the method of the invention not only adopts a single code modulation mode for each data stream, but also obtains comparatively high downlink throughput rate.
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Description

technical field

[0001] The invention relates to long-term evolution (LTE) mobile communication technology, in particular to a downlink adaptive method under user terminal (UE) selective sub-band feedback. Background technique

[0002] In the 3rd Generation Partnership Project (3GPP) LTE, an evolved base station (eNodeB) supports four transmission modes: single-antenna transmission, transmit diversity, open-loop spatial multiplexing, and closed-loop spatial multiplexing. According to Section 7.2 of 3GPP TS 36.213V8.2.0, the UE reports the process of channel quality indication (CQI), precoding matrix indication (PMI) and rank indication (RI). Channel (PUSCH) and physical uplink control channel (PUCCH) support UE selective subband feedback.

[0003] Under the UE selective subband feedback, the UE will feed back two types of CQI, ie subband CQI and wideband CQI. For PUSCH, the UE will feed back a subband CQI indicating the average channel quality on the M best subbands and a w...

Claims

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