TDD Configuration for Secondary Serving Cell Across Base Stations
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Solution Overview
Problem
In wireless communications networks, existing methods fail to complete Time Division Duplex (TDD) configuration for a secondary serving cell when the primary and secondary serving cells of a terminal belong to different base stations.
Innovation Solution
A method and system where a primary base station receives TDD configuration information and identity of a secondary serving cell from a secondary base station and sends it to a terminal, allowing the terminal to determine uplink-downlink subframe allocation, even when the base stations are different.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the terminal maintains connection to two different cells of the same base station, then the TDD configuration can be completed using the primary serving cell to send configuration information, but the method fails when the primary and secondary serving cells belong to different base stations
Solution Approach 1:
The patent introduces an intermediary mechanism where the primary base station acts as a mediator to receive TDD configuration information from the secondary base station and forward it to the terminal. This intermediary approach enables configuration information to be transmitted across different base stations, resolving the limitation where the terminal could only receive TDD configuration from its serving base station.
Solution Approach 2:
The patent segments the TDD configuration process into distinct stages: (1) secondary base station generates configuration information, (2) primary base station receives and forwards the information, and (3) terminal applies the configuration. This segmentation allows the system to handle inter-base station scenarios by separating the configuration generation from the configuration delivery, enabling flexible deployment across different base station architectures.
2Adaptability or versatility
If the primary base station forwards TDD configuration information from the secondary base station to the terminal, then inter-base station TDD configuration is enabled, but additional signaling overhead and coordination complexity are introduced
Solution Approach 1:
The primary base station is designed with multi-functionality, serving both as a regular serving base station for the terminal and as a configuration forwarding intermediary. By making the primary base station universal in its role, the system avoids introducing dedicated new network elements, thereby limiting the increase in overall system complexity while achieving inter-base station TDD configuration capability.
Data Source
AI summary
A method and a system for implementing time division duplex configuration of a secondary serving cell are provided. A primary base station receives time division duplex TDD configuration information of a secondary serving cell and an identity of the secondary serving cell from a secondary base station, where the TDD configuration information of the secondary serving cell is allocated by the secondary base station to the secondary serving cell. The primary base station sends the TDD configuration information of the secondary serving cell and the identity of the secondary serving cell to a terminal, so that the terminal determines an uplink-downlink subframe allocation of the secondary serving cell according to the TDD configuration information.