Control Information on Data Channels to Reduce Blind Detection
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Solution Overview
Problem
Existing communication systems require terminals to perform blind detection on control channels, leading to high power consumption and detection complexity due to the uncertainty of the specific time and resource used for sending control information.
Innovation Solution
Sending control information on data channels with demodulation reference signals (DMRS) to indicate the presence and attributes of the control information, allowing terminals to avoid blind detection and reduce power consumption and signaling overheads.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If control information is sent on a control channel, then the transmit end can schedule data channels, but the receive end needs to perform blind detection on all possible resources at all possible time points, causing large power consumption
Solution Approach 1:
The patent merges control information with data channel transmission by carrying control information on the data channel instead of using a separate control channel. This integration allows the receive end to obtain control information during data reception without requiring separate blind detection processes, thereby reducing power consumption while maintaining reliable control information transmission
Solution Approach 2:
The data channel is given multi-functionality by enabling it to carry both data and control information simultaneously. This universal approach eliminates the need for dedicated control channel monitoring and blind detection, allowing the receive end to process both types of information through a single reception process, thus reducing energy consumption
2Reliability
If control information is sent on a control channel, then scheduling can be performed, but the terminal device cannot learn in advance the specific time point and resource, requiring monitoring of all possible resources
Solution Approach 1:
The patent applies preliminary action by indicating control information attributes (such as time-frequency resource positions, size, and encoding schemes) in advance through DMRS attribute information. This allows the receive end to pre-determine where and how to find control information before actual data reception, eliminating the need for complex blind detection across all possible resources and time points
3Use of energy by moving object
If control information is carried on data channel with DMRS indication, then power consumption and detection complexity are reduced, but signaling overheads must be minimized
Solution Approach 1:
The DMRS serves multiple functions: it provides demodulation reference for data channels while simultaneously carrying attribute information of control information through its attribute parameters. This multi-functionality allows the system to convey control information and its attributes without requiring additional dedicated signaling, thereby minimizing signaling overheads while maintaining low power consumption
Data Source
AI summary
This application provides a method for sending and receiving control information, an apparatus, and a system. A transmit end sends control information on a data channel, so that a receive end does not need to monitor a control channel through blind detection within a period of time that is after the receive end receives the control information. This can reduce power consumption of the receive end, and also reduce detection complexity caused by blind detection. In addition, attribute information of a demodulation reference signal (DMRS), a start position of a time domain resource and/or a frequency domain resource occupied by the data channel, or a parameter in semi-persistent transmission (SPS) information is used to indicate whether the control information is carried on the data channel. In this way, the receive end can correctly receive the control information, and signaling overheads can be effectively reduced.