Adaptive Blind Decoding for Wireless Terminal Energy Reduction
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current wireless communication systems face challenges in providing reliable and efficient data transmission for Machine-Type Communications (MTC) devices, particularly in terms of increased coverage and reduced costs, especially in areas with low data traffic and intermittent connectivity.
Innovation Solution
A method and apparatus for a terminal to receive control data by performing blind decoding on sub-frames and monitoring control channels, utilizing redundant information to enhance data transmission coverage, including dynamic repetitive transmission of uplink data without HARQ processes, and adaptive repetitive transmission counts based on channel states.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If blind decoding is performed on every sub-frame to monitor control channels, then data transmission reliability is improved, but terminal energy consumption increases
Solution Approach 1:
The patent applies dynamics by making the blind decoding process adaptive rather than static. The terminal dynamically adjusts its decoding behavior based on received indicators: when the base station transmits a wake-up indicator, the terminal performs blind decoding; when no wake-up indicator is transmitted or a sleep indicator is received, the terminal skips blind decoding and enters sleep mode. This dynamic adaptation resolves the contradiction by maintaining reliability only when necessary while reducing energy consumption during normal operation.
Solution Approach 2:
The patent changes the operational parameters of the terminal based on external signals. The terminal monitors specific downlink indicators (wake-up indicators, sleep indicators) that trigger parameter changes in its behavior - switching between active blind decoding mode and sleep mode. This parameter change mechanism allows the system to maintain high reliability when data transmission is needed while dramatically reducing energy consumption when no transmission is required.
2Reliability
If redundant information is transmitted for control channels, then data transmission coverage is improved, but network overhead increases
Solution Approach 1:
The patent applies partial action by transmitting redundant control information only when necessary for coverage enhancement, rather than continuously. The base station sends wake-up indicators and sleep indicators selectively based on whether data transmission is needed, providing just enough redundancy to ensure coverage in challenging conditions without continuously flooding the network with overhead information. This resolves the contradiction by providing coverage enhancement only when required.
Solution Approach 2:
The system uses feedback mechanisms where the base station monitors terminal states and transmission needs, then sends appropriate indicators (wake-up or sleep) accordingly. This feedback loop ensures that redundant information is transmitted only when it serves a purpose - either to wake up a terminal for data transmission or to confirm it can remain in sleep mode - thereby minimizing unnecessary network overhead while maintaining coverage reliability.
Data Source
AI summary
The prevent invention relates to a method and apparatus for transmitting and receiving data. The method for receiving control data by a terminal can include the steps of: a terminal receiving redundant information on a first control channel from a base station; the terminal receiving a first subframe from the base station and first blind decoding being performed on the first subframe in order to monitor the first control channel; the terminal receiving a second subframe from the base station and second blind decoding being performed on the second subframe on the basis of the redundant information and the first blind decoding information in order to monitor a second control channel.