Channel quality indicator (CQI) enhancement method and device applied to multi-user superposition transmission

A multi-user and user equipment technology, applied in transmission systems, digital transmission systems, electrical components, etc., can solve problems such as not including, high complexity, and not supporting user equipment interference cancellation capabilities

Active Publication Date: 2016-11-23
ALCATEL LUCENT SHANGHAI BELL CO LTD +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] Post-NAICS CQI is an existing solution, but as described earlier, this will bring a lot of complexity
Furthermore, superposition transmission aims at dynamic multi-user transmission by intentionally amplifying multi-user interference and exploiting user-specific interference cancellation capability, which is not supported in post-NAICS CQI
In addition, the existing CSI feedback does not include the ability of the victim UE to report and decode the interference signal, and the ability of the victim UE to decode the interference signal is very critical for the eNB to make UE pairing and scheduling decisions

Method used

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  • Channel quality indicator (CQI) enhancement method and device applied to multi-user superposition transmission
  • Channel quality indicator (CQI) enhancement method and device applied to multi-user superposition transmission
  • Channel quality indicator (CQI) enhancement method and device applied to multi-user superposition transmission

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Embodiment Construction

[0031] In the following detailed description of the preferred embodiment, reference is made to the accompanying drawings which form a part hereof. The accompanying drawings show, by way of example, specific embodiments in which the invention can be practiced. The illustrated embodiments are not intended to be exhaustive of all embodiments in accordance with the invention. It is to be understood that other embodiments may be utilized and structural or logical changes may be made without departing from the scope of the present invention. Accordingly, the following detailed description is not limiting, and the scope of the invention is defined by the appended claims. It should be noted that although the steps of the relevant methods in the present invention are described in a specific order in the accompanying drawings, this does not require or imply that these operations must be performed in this specific order, or that all shown operations must be performed to achieve the desi...

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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.

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 on the same resource unit) same transmit diversity scheme). [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 signal, and then...

Claims

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Application Information

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IPC IPC(8): H04L1/00
Inventor 武卓王钧沈钢张闽
Owner ALCATEL LUCENT SHANGHAI BELL CO LTD
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