Relay Node RRC Message Processing for Multi-Hop IAB Networks
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Solution Overview
Problem
Current LTE relay technology is limited to single-hop relays, making it difficult to configure multiple hop relays and process data efficiently across multiple relay nodes, leading to increased latency and inability to meet the quality of service requirements for each service in wireless communication systems.
Innovation Solution
A method and device for processing RRC messages through a relay node by configuring a signaling radio bearer or higher layer protocol connection with a donor base station, allowing RRC messages to be relayed across multiple hops while maintaining security, enabling dynamic configuration of relay hops and efficient data processing based on service requirements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If typical LTE relay technology is used, then single-hop relay function is provided, but multiple hop relays cannot be configured
Solution Approach 1:
The patent segments the relay function by introducing separate protocol layers: a relay protocol layer for control plane signaling between relay nodes and donor base station, and a user plane protocol layer for data transmission. This segmentation enables multiple hop relay configuration while maintaining manageable protocol complexity through clear functional separation.
2Area of stationary object
If multiple hop relays are attempted via typical LTE technology, then relay node coverage is expanded, but over-IP layer signaling increases latency
Solution Approach 1:
The patent introduces a relay protocol layer as an intermediary between the donor base station and relay nodes. This intermediary layer handles control plane signaling directly at the protocol level rather than through IP layer encapsulation, reducing signaling latency while enabling multiple hop relay configuration for expanded network coverage.
3Area of stationary object
If multiple hop relays are configured, then relay node coverage is expanded, but data processing complexity increases
Solution Approach 1:
The patent segments data processing by separating control plane functions (handled by the relay protocol layer) from user plane functions (handled by the user plane protocol layer). This segmentation simplifies data processing at each relay node by clearly defining which layer handles which type of traffic, enabling multiple hop relays without proportionally increasing processing complexity.
Solution Approach 2:
The patent extracts the control plane signaling functions into a dedicated relay protocol layer, removing them from the general data processing path. This extraction allows relay nodes to handle control signaling efficiently without burdening the user plane data processing, thereby managing complexity while supporting multiple hop configurations for expanded coverage.
4Adaptability or versatility
If typical LTE relay technology is used, then configuration is made via static OAM, but dynamic service requirements cannot be met
Solution Approach 1:
The patent introduces a dynamic relay protocol layer that enables flexible configuration of multiple hop relays based on service requirements. This dynamic capability allows the network to adapt to different service needs (e.g., different QoS requirements) while the protocol structure itself provides automated management mechanisms that maintain operational simplicity despite the increased flexibility.
Data Source
AI summary
Provided are a connection control method and device based on integrated access and backhaul (IAB) using 5G NR wireless communication technology. The method of a relay node for processing an RRC message may include: setting a donor base station with a signaling radio bearer or a higher layer protocol connection; receiving an RRC message transmitted from a terminal; and transmitting the RRC message to the donor base station or another relay node using the signaling radio bearer or a higher layer protocol.