Relay Node Duplex Coordination via Dynamic Time Domain Configuration
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Solution Overview
Problem
Current duplex coordination methods in relay networks, as implemented in Release 10, fail to meet the requirements for backhaul link communication in 5G NR technologies due to pre-configured fixed subframes in uplink and downlink directions.
Innovation Solution
A method for duplex coordination in relay networks where a relay node device dynamically configures time domain resources to receive messages from a parent node device and send messages to a child node device, allowing for non-overlapping or partially overlapping time domain resources to ensure efficient communication.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If pre-configured fixed subframes are used for uplink and downlink communications, then the relay network can maintain simple scheduling, but it cannot meet the requirements for backhaul link communication in 5G NR technologies
Solution Approach 1:
The patent implements dynamic TDD duplexing where the relay node can dynamically switch between uplink and downlink directions in different time slots based on actual communication needs. The network device dynamically configures time domain resources including slot formats and direction indicators, allowing the system to adapt to varying backhaul link requirements while maintaining structured scheduling through standardized dynamic signaling mechanisms
2Productivity
If the relay node device receives messages from parent node and sends messages to child node simultaneously, then communication efficiency is improved, but resource conflicts occur when time domain resources overlap
Solution Approach 1:
The patent segments time domain resources into distinct slots and subslots, with each slot containing multiple subslots. The network device dynamically indicates the direction (uplink or downlink) for each slot or subslot through DCI signaling. This segmentation allows the relay node to clearly distinguish between reception and transmission time resources, enabling simultaneous communication with parent and child nodes without resource conflicts through precise time-domain partitioning
Solution Approach 2:
The network device acts as an intermediary that dynamically configures and signals time domain resource allocation to the relay node. Through DCI messages containing slot format indicators and direction information, the network device coordinates the relay node's reception and transmission activities, ensuring that uplink and downlink operations do not interfere with each other while maximizing communication efficiency
Data Source
AI summary
The present application relates to a method and device for duplex coordination in a relay network. A second node device sends configuration information to a first node device, so that the first node device, according to the configuration information, receives on a first time domain resource a first message sent by the second node device and sends a second message to a third node device on a second time domain resource. The second node device is a parent node of the first node device, and the third node device is a child node of the first node device. The configuration information includes first and second configuration information which indicates the first and time domain resources, respectively. The first and the second time domain resources partially or completely overlap, and a priority of the first message is higher than a priority of the second message.