PDCCH Resource Allocation Multi-Relay Synchronization
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current 5G NR technology faces challenges in efficiently managing resource allocation and scheduling for multi-relay based communication systems, particularly in ensuring timely transmission of physical downlink control channels (PDCCHs) across relay nodes, which affects communication reliability and efficiency.
Innovation Solution
A method where a base station determines the transmission time for a sequence of PDCCHs and transmits a relay configuration with scheduling information to each relay node, ensuring synchronized relay operations and resource allocation for efficient signal relay.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If multi-relay based communication is implemented to extend coverage, then coverage area is improved, but transmission timing synchronization becomes more difficult
Solution Approach 1:
The base station determines the transmission time of PDCCH signals to target nodes in advance, before actual transmission occurs. This preliminary timing determination is communicated to relay nodes through relay configuration messages, enabling them to forward signals at precisely calculated times. This resolves the synchronization difficulty by pre-planning transmission timing across the multi-relay path.
Solution Approach 2:
The system implements timing feedback mechanisms where relay nodes receive timing information from the base station and adjust their forwarding operations accordingly. The base station monitors and controls the transmission timing of each relay node to maintain synchronization across the extended coverage area, using feedback loops to correct any timing deviations.
2Area of stationary object
If relay nodes are added to extend coverage, then coverage area is improved, but system complexity increases
Solution Approach 1:
The base station acts as a central intermediary that manages all relay nodes. Instead of allowing relay nodes to autonomously coordinate with each other (which would increase complexity), the base station sends centralized relay configurations and scheduling information to each relay node. This intermediary control approach extends coverage while maintaining manageable system complexity through centralized management.
Solution Approach 2:
The communication system is segmented into manageable components: the base station handles high-level control and timing determination, while individual relay nodes handle local signal forwarding based on received configurations. This segmentation allows the system to scale to multiple relay nodes without proportionally increasing overall complexity, as each segment operates semi-independently according to base station instructions.
3Reliability
If centralized control is maintained for multi-relay communication, then transmission reliability is improved, but base station processing load increases
Solution Approach 1:
The base station performs preliminary determination of transmission times for all PDCCH signals before actual transmission. By calculating and communicating timing information in advance through relay configurations, the base station reduces real-time processing requirements during actual signal transmission while maintaining centralized control for reliability.
Solution Approach 2:
The system dynamically adjusts the balance between centralized control and distributed operation. The base station maintains centralized control for critical timing determination to ensure reliability, while relay nodes autonomously execute pre-determined timing instructions to reduce base station processing load during actual transmission operations.
Data Source
AI summary
A configuration for resource allocation for PDCCH with multi-relay based communication. The apparatus determines a transmission time of a signal comprising a sequence of a plurality of PDCCHs to a target node. At least one relay is between the base station and the target node. The apparatus transmits, to each of the at least one relay, a relay configuration comprising scheduling information for each of the at least one relay to relay the signal. The scheduling information is based on a determination of the transmission time of the signal to the target node.