Preconfigured Resource Control Signaling to Reduce Blind DCI Detection
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Solution Overview
Problem
The current communication methods in LTE release 16 result in increased power consumption of terminal devices due to the need for blind detection of downlink control information (DCI) for scheduling downlink data after preconfigured uplink resource transmission.
Innovation Solution
A communication method where a first device sends control information indicating the state of preconfigured-resource transmission, including indication information for successful or unsuccessful transmission, and optionally higher layer data or reconfiguration information, allowing the second device to determine whether to receive these without blind detection of DCI.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the terminal device performs blind detection of DCI for scheduling downlink data after preconfigured uplink resource transmission, then the downlink data can be received, but the power consumption of the terminal device increases
Solution Approach 1:
The network device performs preliminary action by sending indication information in advance to tell the terminal device whether downlink data is scheduled. This allows the terminal device to avoid blind detection and directly determine whether to receive downlink data, thereby reducing power consumption while ensuring reliable data reception.
Solution Approach 2:
The network device provides feedback to the terminal device through indication information, enabling the terminal device to adjust its reception behavior accordingly. This feedback mechanism eliminates the need for blind detection by informing the terminal device in advance about the scheduling status, thus reducing power consumption.
2Use of energy by moving object
If the network device sends indication information about transmission state and data scheduling, then the terminal device can reduce blind detection and power consumption, but the signaling overhead increases
Solution Approach 1:
The indication information is merged with the existing HARQ-ACK feedback that the terminal device must send to the network device. By combining the scheduling indication with the necessary uplink feedback, the patent avoids additional separate signaling messages, thereby reducing overall signaling overhead while still providing the terminal device with information to reduce blind detection.
Solution Approach 2:
The uplink message serves multiple functions: it carries both the HARQ-ACK feedback (original function) and the scheduling indication information (new function). This multi-functionality allows the network device to convey scheduling information without requiring separate dedicated signaling resources, thus minimizing additional overhead.
Data Source
AI summary
Embodiments of this application provide a communication method and device. The method includes: A first device determines first control information, where the first control information includes a first field and a second field, the first field is a resource block assignment field and all bits in the first field are set to 1, and the second field indicates that the first control information includes reconfiguration information of a pre-configured resource and whether transmission on the pre-configured resource is successful, wherein the first control information enables a second device not to monitor a second search space, the second search space is used to transmit third control information and the third control information is used to schedule data. The first device sends the first control information to the second device.