Relay Node Resource Reservation in 5G NR Networks
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Solution Overview
Problem
Current wireless communication systems face challenges in efficiently managing resource reservations for relay nodes in 5G and New Radio (NR) networks, particularly in multi-hop scenarios where reserved resources are not effectively utilized, leading to inefficiencies and potential interference with critical services.
Innovation Solution
The technology configures multiple types of reserved resources for relay nodes, distinguishing between those usable for parent-child node communications and those not, and orthogonalizes backhaul and access link resources in the frequency domain to minimize interference, while adjusting slot format indicators based on hop order to synchronize data transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If reserved resources are configured for relay nodes in multi-hop scenarios, then resource utilization is improved, but resource waste and interference with critical services increase
Solution Approach 1:
The patent segments reserved resources into multiple types (first type and second type) with different usability characteristics. Type 1 reserved resources can be used by the relay node and its children for access link transmissions, while type 2 reserved resources cannot be used by either the relay node or its children. This segmentation allows selective utilization of reserved resources, improving resource utilization for non-critical services while preventing waste and interference with critical services that require the reserved resources.
Solution Approach 2:
The patent applies local quality by allowing different portions of reserved resources to have different properties based on their location in the resource space and their assignment to different relay nodes. Each relay node receives customized reserved resource configurations from its parent node, where specific resource portions are marked as usable or unusable based on local network conditions and service requirements, rather than applying a uniform restriction across all reserved resources.
2Productivity
If multiple types of reserved resources are configured, then resource allocation efficiency is improved, but system complexity increases
Solution Approach 1:
The patent simplifies system complexity by segmenting reserved resources into clearly defined types with distinct usage rules. The parent node configures type 1 and type 2 reserved resources separately, and the relay node applies different transmission rules for each type. This segmentation provides a systematic framework that improves resource allocation efficiency while maintaining manageable complexity through clear categorization and rule-based management.
Solution Approach 2:
The patent introduces dynamic resource allocation where the parent node can flexibly configure the split between type 1 and type 2 reserved resources based on network conditions and service requirements. The relay node dynamically adjusts its transmission behavior based on the configured resource types, enabling adaptive resource management that balances efficiency and complexity according to actual network demands.
3Reliability
If backhaul and access link resources are orthogonalized in frequency domain, then interference is reduced, but resource flexibility decreases
Solution Approach 1:
The patent segments the frequency domain resources into backhaul link resources and access link resources that are orthogonal (non-overlapping). This frequency domain segmentation ensures that backhaul transmissions between parent and relay nodes do not interfere with access transmissions between relay nodes and their children, improving reliability by eliminating interference while maintaining resource flexibility through separate resource pools that can be independently configured and allocated.
Data Source
AI summary
Methods, systems and devices for resource reservations for relay nodes in 5G and New Radio (NR) networks are described. An exemplary method for wireless communication includes performing a first set of communications between a first relay node and at least one parent of the first relay node using transmission resources that are determined by at least a first type of resources, and performing a second set of communications between the first relay node and at least one child node of the first relay node using transmission resources that are determined by at least a second type of resources. Another exemplary method for wireless communication includes receiving a slot format message from a parent of the first relay node, where the slot format message is effective in a time offset, which is based on a hop index of the first relay node.