5G UE PDCCH Blind Detection Power Reduction
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In 5G New Radio systems, user equipment (UE) experiences high power consumption due to the large number of group common PDCCH detection times required to obtain common information across multiple component carriers, leading to inefficient energy usage.
Innovation Solution
A method where a network device sends first information to a terminal device to instruct it to detect group common PDCCH on a reduced number of component carriers, reducing unnecessary detection times and power consumption by indicating a fixed carrier for detection, thereby minimizing blind detection times.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of information
If UE detects group common PDCCH on all configured CCs to obtain common information, then complete information acquisition is achieved, but power consumption increases due to large number of detection times
Solution Approach 1:
The patent segments the detection task by dividing all configured CCs into a first set of CCs and a second set of CCs. The UE only detects group common PDCCH on CCs in the first set, while CCs in the second set are indicated to have the same group common information. This segmentation reduces the number of detection operations while ensuring complete information acquisition across all CCs.
Solution Approach 2:
The patent applies universality by indicating that group common information on certain CCs (second set) is the same as on other CCs (first set). The UE can universally apply the detected information from the first set to multiple CCs in the second set, reducing redundant detection while maintaining information completeness.
2Reliability
If UE performs blind detection on multiple CCs to ensure information completeness, then information reliability is improved, but detection time increases
Solution Approach 1:
The patent segments CCs into two sets with different detection requirements. The first set requires actual blind detection for reliability verification, while the second set uses indicated information. This segmentation reduces total detection time while maintaining information reliability through the first set's detection.
Solution Approach 2:
The network device performs preliminary action by determining and indicating to the UE which CCs belong to the first set and which to the second set. This preliminary configuration allows the UE to optimize its detection strategy beforehand, reducing actual detection time while ensuring reliability through proper set allocation.
Data Source
Figure 1~2
Figure 3~4
Figure 5~6
AI summary
This application provides an information transmission method and apparatus, to resolve an existing problem of relatively large power consumption caused by a relatively large quantity of group common PDCCH blind detection times of UE. The method includes: generating, by a network device, first information; and sending, by the network device, the first information to a terminal device, where the first information is used to instruct the terminal device to detect at least one group common PDCCH on N component carriers CCs, N is a positive integer and is less than or equal to M, M is a quantity of CCs configured for the terminal device, and M is a positive integer. Based on this, after receiving the first information, the terminal device detects the at least one group common PDCCH on the N CCs according to the first information.