Anchor Base Station Data Forwarding for Inactive Terminal Transmission
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Solution Overview
Problem
High signaling and interface overheads occur during terminal movement between base stations in inactive states, requiring frequent context migration and switching, leading to inefficient data transmission in LTE and 5G networks.
Innovation Solution
A method where the serving base station forwards uplink data to the anchor base station without context migration or switching, using identification information to determine the anchor base station and maintain efficient data transmission, reducing signaling and interface overheads.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the UE performs tracking area update and context migration when moving between base stations in inactive state, then the connection can be maintained, but signaling overheads and interface overheads increase significantly
Solution Approach 1:
The patent applies preliminary action by pre-establishing a data transmission relationship between the serving base station and anchor base station before the UE actually needs to transmit data. The serving base station stores the anchor base station's address information in advance, so when data needs to be transmitted, the UE can directly send data to the anchor base station through the pre-established relationship without triggering full context migration or tracking area updates, thus reducing signaling overheads while maintaining connection reliability
Solution Approach 2:
The patent extracts the essential data transmission function from the complex context migration process. Instead of migrating the entire UE context when moving between base stations, the invention extracts only the necessary data transmission capability and establishes a direct data path between the serving base station and anchor base station. This separates the data transmission function from the full connection establishment process, reducing overheads while preserving the core functionality
2Productivity
If context migration is performed frequently when UE moves between base stations, then data transmission can continue, but interface overheads and processing load increase
Solution Approach 1:
The patent ensures continuity of useful action by maintaining a persistent data transmission relationship between the serving base station and anchor base station. Once the anchor base station is determined and stored in the serving base station, the data transmission path remains active and continuous. When the UE needs to send data, the serving base station can immediately forward data to the anchor base station without interrupting the transmission process or triggering full context migration, thus ensuring continuous data transmission while reducing interface overheads
Solution Approach 2:
The patent introduces the anchor base station as an intermediary that facilitates continuous data transmission. The anchor base station acts as a mediator between the serving base station and the core network, maintaining a stable data transmission path. This intermediary role allows the serving base station to forward data directly to the anchor base station without requiring frequent context migration, thereby ensuring transmission continuity while reducing the processing load and interface overheads associated with full context reestablishment
Data Source
AI summary
Embodiments of this application provide a data transmission method and apparatus. The method includes: receiving data sent by a terminal in an inactive state, where the data includes to-be-sent data sent by the terminal and identification information of the terminal; determining an anchor base station of the terminal based on the identification information; and sending the data to the anchor base station, so that the anchor base station sends the data to a core-network device. The uplink data of the terminal is forwarded to the anchor base station by using a serving base station and through an interaction between the anchor base station and the serving base station that currently provides an air interface resource for the terminal, and is then transmitted to a core network.