LTE Control Information Aggregation Across Multiple Subframes
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Solution Overview
Problem
The reliability of control information transmission in LTE systems is low due to the base station's ability to perform mapping and transmission of control information in only one downlink subframe, limiting the overall reliability of communication.
Innovation Solution
A method that determines a preset pattern to aggregate control information across multiple subframes, using resource indicators to map and transmit control information using a physical channel, enhancing the reliability by utilizing multiple subframes for transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If control information is transmitted in only one downlink subframe, then the transmission process is simple and fast, but the reliability of control information transmission is low
Solution Approach 1:
The patent applies preliminary action by pre-configuring multiple downlink subframes for control information transmission before the actual transmission occurs. The base station prepares multiple candidate subframes and selects appropriate ones for transmitting control information to the UE, ensuring that if one subframe fails, other pre-prepared subframes can serve as backups to maintain transmission reliability.
Solution Approach 2:
The patent changes the parameter of transmission timing by allowing control information to be transmitted across multiple different downlink subframes rather than being confined to a single subframe. This parameter change from single-subframe to multi-subframe transmission enables the system to overcome fading and interference affecting individual subframes, thereby improving reliability without significantly increasing complexity.
2Reliability
If control information is transmitted across multiple subframes, then the reliability of transmission is improved, but the complexity of determining transmission resources increases
Solution Approach 1:
The patent applies dynamics by making the control information transmission flexible and adaptive across multiple subframes. The base station dynamically selects which downlink subframes to use for transmission based on channel conditions and other factors, while the UE dynamically monitors multiple subframes to detect control information. This dynamic approach improves reliability by adapting to changing conditions while managing resource determination complexity through structured selection and monitoring procedures.
Data Source
AI summary
The present application discloses a control information sending method that includes: determining, by the user equipment, a first pattern from a preset set of patterns, wherein the pattern corresponds to an aggregation level for control information in each subframe of multiple subframes, and/or a resource indicator for a resource that is used for the control information in each subframe of the multiple subframes; and acquiring, by the user equipment, the control information mapped on the resource in each subframe of the multiple subframes according to the first pattern.