Physical downlink control channel (PDCCH) self-adaptive transmission method and device

A technology of adaptive transmission and outer loop, applied in connection management, wireless communication, electrical components, etc., can solve problems such as poor reliability of PDCCH, and achieve the effect of improving reliability

Active Publication Date: 2012-09-19
NANJING ZHONGXING SOFTWARE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a PDCCH adaptive transmission method and device for solving the problem of poor PDCCH reliability

Method used

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  • Physical downlink control channel (PDCCH) self-adaptive transmission method and device
  • Physical downlink control channel (PDCCH) self-adaptive transmission method and device
  • Physical downlink control channel (PDCCH) self-adaptive transmission method and device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0063] The target BLER of the user's PDCCH is 1%, the StepUp is 0.99dB, the StepDown is 0.01dB, the initially used CCE aggregation degree CCEinit is 8, and the outer loop factor DeltaCCEdB of the current TTI user is -2dB.

[0064] If the user does not receive DCI1 and does not perform ACK / NACK feedback, the base station detects the user's DTX information in the current TTI, so the base station adds an upward adjustment step to the user's outer loop factor, and the current outer loop factor is -1.01 dB.

[0065] The base station determines the dB value of each CCE aggregation degree in the CCE aggregation degree set according to the CCE aggregation degree CCEinit initially used by the user, where CCEinit is 0dB, the CCE aggregation degree set is {1, 2, 4, 8}, and the CCE aggregation degree CCEinit is 8, then CCE aggregation degree 1 is -9dB, CCE aggregation degree 2 is -6dB, CCE aggregation degree 4 is -3dB, and CCE aggregation degree 8 is 0dB.

[0066] The user's outer ring f...

Embodiment 2

[0069] The target BLER of the user's PDCCH is 1%, the StepUp is 0.99dB, the StepDown is 0.01dB, the initially used CCE aggregation degree CCEinit is 8, and the outer loop factor DeltaCCEdB of the current TTI user is -3.02dB.

[0070] The base station has not detected the user's DTX information in the current TTI, so the base station reduces the user's outer loop factor by a step-down StepDown, and the current outer loop factor is -3.03dB.

[0071] The base station determines the dB value of each CCE aggregation degree in the CCE aggregation degree set according to the CCE aggregation degree CCEinit initially used by the user, let CCEinit be 0dB, the CCE aggregation degree set is {1, 2, 4, 8}, and the CCE aggregation degree CCEinit is 8, then CCE aggregation degree 1 is -9dB, CCE aggregation degree 2 is -6dB, CCE aggregation degree 4 is -3dB, and CCE aggregation degree 8 is 0dB.

[0072] The user's outer loop factor -3.03 in the current TTI is closest to -3dB, therefore, the us...

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PUM

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Abstract

The invention discloses a PDCCH self-adaptive transmission method and a device. The method includes that a base station adjusts outer ring factors by detecting users' discontinuous transmission (DTX) information to obtain current outer ring factors; and the base station distributes command control equipment (CCE) resources meeting target block error ratio (BLER) to users' PDCCH. According to the PDCCH self-adaptive transmission method and the device, polymerization degree of the CCE used by the PDCCH is controlled through the detection of users' DTX information by the base station, so that reliability of the PDCCH is improved.

Description

technical field [0001] The present invention relates to a PDCCH (High Speed ​​Physical Downlink Control Channel, physical downlink control channel) adaptive transmission technology, in particular to a PDCCH adaptive transmission method and device. Background technique [0002] LTE (Long-Term Evolution, long-term evolution) is a long-term evolution technology. The PDCCH is composed of a CCE (Control Channel Element, control channel element), and is used to carry DCI (Downlink Control Information, downlink control information). [0003] In the multi-cell multi-user scenario, due to the different cell locations and states of each user, if some users are on foot and some are on a vehicle, adaptive transmission of PDCCH is required to ensure the reliability of PDCCH transmission . In the existing technology, the downlink quality information fed back by users such as CQI (Channel Quality Indicator, Channel Quality Indicator) and RSRP (Reference Signal Receiving Power, Reference ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W72/04H04W72/14
CPCH04W76/048H04W72/14H04W76/28H04W72/23
Inventor 谭源春周晖
Owner NANJING ZHONGXING SOFTWARE
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