PDCCH Time Domain Positioning for 5G Beam Group Coverage
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In 5G high-band multi-beam systems, terminals face increased complexity and battery power consumption due to the need to blindly detect the time domain position of Physical Downlink Control Channels (PDCCH) across multiple beams, and existing schemes lack flexibility to adapt to dynamic changes in user numbers and service capacity.
Innovation Solution
A method where a network device transmits a first downlink control channel with indication information for time domain resource allocation, allowing terminals to dynamically adjust the position of subsequent control channels within a beam group, reducing blind detection and enhancing flexibility.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the terminal blindly detects the time domain position of PDCCH across multiple beams, then the control channel can be received, but the terminal complexity and battery power consumption increase significantly
Solution Approach 1:
The patent applies preliminary action by having the network device pre-indicate the time domain position of the PDCCH through a first downlink control channel before the terminal needs to detect it. This allows the terminal to directly access the control channel at the indicated position without performing blind detection across multiple possible positions, thereby reducing terminal complexity and power consumption while ensuring reliable control channel reception.
2Reliability
If the time domain density or transmission period of PDCCH is configured through RRC signaling, then the control channel can be transmitted, but the flexibility is very low and cannot adapt to dynamic changes
Solution Approach 1:
The patent applies dynamics by introducing a dynamic indication mechanism where the network device uses a first downlink control channel to indicate the time domain position of subsequent PDCCHs. This dynamic indication allows the system to adapt to changing user numbers and service capacities in real-time, overcoming the rigidity of static RRC signaling configuration while maintaining reliable control channel transmission.
Solution Approach 2:
The patent applies parameter changes by allowing the network device to dynamically change the time domain position parameters of PDCCH based on current system conditions. Through the first downlink control channel, the network can adjust parameters such as starting symbol and time domain density according to actual user and service capacity changes, providing the needed flexibility while ensuring reliable control channel delivery.
3Device complexity
If a shared control channel is used for all beams, then the structure is simple, but the beamforming gain cannot be obtained and coverage requirements cannot be met
Solution Approach 1:
The patent applies segmentation by dividing the control channel resources into beam-specific segments. Instead of using a single shared control channel for all beams, the system allocates specific time domain positions to PDCCHs for different beams, allowing each beam to have its dedicated control channel resources. This segmentation enables beamforming gain to be obtained for each beam while maintaining reasonable structural organization.
Data Source
AI summary
An embodiment of the present disclosure discloses a method and a device for transmitting signaling and device, including: receiving, by a terminal, a first downlink control channel of a group of downlink control channels transmitted by a network device, wherein the first downlink control channel carries first indication information, the first indication information is used to indicate at least one piece of time domain resource information of the at least one downlink control channel of the group of downlink control channels, and the group of downlink control channels is used for a group of terminals in a cell. In the embodiments of the present disclosure, the beamforming gain of the control channel won't be destroyed, and it can effectively satisfy the coverage performance of a high frequency band of a future communication system while avoiding blind detection of the control channel.