Uplink Data Processing in 5G NR IAB Relay Nodes
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Solution Overview
Problem
Current LTE relay technology is limited to single-hop relaying, making it difficult to configure multiple hops and process data efficiently, leading to increased latency and inability to separately process data via multiple relay nodes.
Innovation Solution
A method and device for processing uplink user data in a multi-hop relay structure, where a relay node receives data from user equipment, derives a UE bearer identifier, selects a backhaul RLC channel based on the identifier and donor base station address, and transmits the data to the donor base station or another relay node, enabling dynamic configuration of multiple hops.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If LTE relay technology is used for single-hop relaying, then the relay node can transfer IP packets between UE and base station, but it is impossible to configure multiple hops and separately process data via multiple relay nodes
Solution Approach 1:
The patent segments the data processing function by introducing a unique identifier (IAB-UE-ID) that combines relay node identifier and UE identifier. This segmentation allows each relay node to independently process data packets without requiring complex global coordination, enabling multi-hop configuration while maintaining manageable processing complexity at each node.
Solution Approach 2:
The patent introduces an intermediary identifier mechanism (IAB-UE-ID) that acts as a mediator between the relay node and UE. This intermediary enables indirect identification and routing through multiple hops without requiring direct base station involvement in each relay decision, thus enabling multi-hop configuration while simplifying data processing at each intermediate node.
2Adaptability or versatility
If multiple hop relays are configured, then data can be transferred via multiple relay nodes, but over-IP layer signaling and data processing increases latency
Solution Approach 1:
The patent applies preliminary action by pre-configuring the IAB-UE-ID identifier at the relay node before data transmission begins. The identifier combines the relay node's own ID with the UE's ID, creating a pre-computed routing key that enables immediate packet forwarding decisions without requiring real-time signaling or complex processing during data transmission, thus reducing latency in multi-hop scenarios.
3Ease of manufacture
If static OAM configuration is used, then relay node setup is simple, but it cannot dynamically configure multiple hops
Solution Approach 1:
The patent implements self-service by enabling relay nodes to automatically generate their own IAB-UE-ID identifiers by combining their assigned relay ID with received UE identifiers. This self-service mechanism eliminates the need for complex centralized OAM configuration for each multi-hop scenario, allowing dynamic multi-hop configuration while maintaining operational simplicity through automated identifier generation and packet routing.
Data Source
AI summary
Provided are a data processing method and device based on integrated access and backhaul (IAB) using 5G NR wireless communication technology. A method of a relay node may be provided for processing uplink user data. The method may include: receiving uplink user data from a user equipment; deriving a user equipment bearer identifier (UE-bearer-ID) by using logical channel identification information linked to an RLC PDU of uplink user data; selecting a backhaul RLC channel for transmission of uplink user data on the basis of at least one among a user equipment bearer identifier and donor base station address information; and transmitting uplink user data, via the selected backhaul RLC channel, to a donor base station or another relay node.