CQI enhancement method and device for multi-user cascaded transmission

A multi-user and user equipment technology, applied in transmission systems, digital transmission systems, error prevention, etc., can solve problems such as not supporting user equipment interference cancellation capabilities, large complexity, and exclusion
CN106160925BActive Publication Date: 2019-08-16ALCATEL LUCENT SHANGHAI BELL CO LTD +1
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
ALCATEL LUCENT SHANGHAI BELL CO LTD
Publication Date
2019-08-16

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Abstract

The invention discloses a channel quality indicator (CQI) enhancement method and a CQI enhancement device applied to multi-user superposition transmission. The method comprises the steps of implementing superposition transmission pre-pairing according to first CQI information from near-end user equipment and second CQI information from remote user equipment; sending reference signals to user equipment in an administered cell, inserting interference eliminating reference signals into the reference signals in a time division or frequency division manner, wherein the interference eliminating reference signals are applied to the near-end user equipment to estimate indication information of capacity of eliminating interference generated by the remote user equipment; receiving interference CQI information from the near-end user equipment; and determining decisions on pairing and scheduling of the near-end user equipment and the remote user equipment according to the interference CQI information of the near-end user equipment and the second CQI information of the remote user equipment. Based on an additional CQI report, the base station can make the correct user equipment pairing and scheduling decisions, and can also acquire gains from frequency selectivity brought by dynamic pairing and scheduling.
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Description

technical field

[0001] The present invention relates to a wireless communication network, and more specifically, to a method and device for CQI enhancement for multi-user cascaded transmission in a wireless communication network. Background technique

[0002] The purpose of the downlink multi-user superposition transmission (MUST: Multi-User Superposition Transmission) research project is to pair multiple users so that they transmit multiple data layers at the same time (that is, use the same spatial precoding vector or in the same resource unit the same transmit diversity scheme as above).

[0003] For example, if figure 1 As shown, the near-end user equipment UE1 is severely interfered by the far-end user equipment UE2. Because UE2 is at the edge of the cell, and is allocated relatively large transmit power. UE1 uses advanced receiver technology, with the help of some auxiliary information received by UE1, first decodes UE2 signal, then removes it from the received sign...

Claims

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