Base Station Uplink Forwarding Without Context Migration
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Solution Overview
Problem
The New Radio (NR) system incurs significant signaling overhead due to the migration of terminal device context between base stations during early data transmission, which is inefficient and costly.
Innovation Solution
A data transmission method where the target base station forwards uplink data from an inactive terminal device to the anchor base station without migrating the context, using either a container or tunnel bearing manner, allowing direct transmission to the core network.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If context migration is performed during early data transmission, then data transmission can be enabled, but signaling overhead increases significantly
Solution Approach 1:
The patent extracts the data transmission function from the context migration process. By using the existing user plane connection between the anchor base station and the target base station, the solution enables data transmission without requiring full context migration, thus reducing signaling overhead while maintaining data transmission capability
Solution Approach 2:
The patent introduces the user plane connection as an intermediary mechanism. Instead of migrating control plane context, the solution uses the pre-established user plane tunnel between anchor and target base stations to forward data, acting as a mediator that enables data transmission without full context migration
2Productivity
If context migration is performed between base stations, then data can be transmitted to core network, but transmission efficiency decreases due to additional signaling
Solution Approach 1:
The patent applies preliminary action by establishing the user plane connection between anchor and target base stations in advance during handover preparation. This pre-established connection enables immediate data transmission without waiting for context migration to complete, thus improving transmission efficiency
Solution Approach 2:
The solution extracts the data forwarding function from the context migration process. By separating data transmission from control plane context migration and using the pre-established user plane tunnel, the patent enables parallel operations that improve overall transmission efficiency
Data Source
AI summary
Provided in embodiments of the present application are a data transmission method and a network device, which can implement small data transmission under the circumstance that a context of a terminal device is not migrated. The data transmission method comprises: a target base station sends first information to an anchor base station, the first information comprising uplink data sent by an inactive state terminal device, wherein the first information is transmitted by a container carrying means, or the first information is transmitted by a tunnel carrying means.