Dynamic Frame Structure Configuration for Uplink Downlink Flexibility
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Solution Overview
Problem
The existing LTE TDD system faces challenges with insufficient Guard Period (GP) length, leading to severe interference from distant base stations, and lacks flexibility in configuring frame structures to adapt to varying uplink and downlink transmission requirements.
Innovation Solution
A method is introduced to configure frame structures by transmitting configuration information and indication signals to terminals, allowing for flexible adjustment of frame periodicity and time-domain transmission resources, including the position and availability of uplink transmission resources, to optimize GP lengths and reduce interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If the Guard Period (GP) length is increased to reduce interference from distant base stations, then network interference is reduced, but the frame structure flexibility and adaptability to varying uplink and downlink transmission requirements deteriorates
Solution Approach 1:
The patent introduces dynamic configuration of frame structures by allowing the network side device to flexibly adjust the positions of switch points (where transmission direction changes between uplink and downlink) and the lengths of guard periods. This is achieved through configuration information transmitted to terminals, enabling the system to adapt GP length and frame structure dynamically based on interference conditions and traffic requirements, rather than using fixed pre-defined configurations.
Solution Approach 2:
The patent changes the parameters of frame structure configuration by introducing configurable switch-point positions and variable guard period lengths. The network side device can adjust these parameters through broadcast information, allowing the system to optimize GP length to reduce interference while simultaneously adapting frame structure to different uplink-downlink transmission ratios, thus resolving the contradiction between interference reduction and flexibility.
2Device complexity
If pre-defined uplink and downlink time-slot configurations are used to simplify system design, then device complexity is reduced, but the ability to adapt to varying service requirements and optimize GP lengths deteriorates
Solution Approach 1:
The patent transforms the static pre-defined configuration system into a dynamic one by introducing configurable switch points and adjustable guard periods. The network side device can adapt the frame structure to different service requirements (e.g., uplink-heavy or downlink-heavy traffic) by transmitting appropriate configuration information to terminals, maintaining simplicity while enabling adaptability.
Solution Approach 2:
The patent creates a universal frame structure configuration mechanism that can serve multiple different service scenarios. By using configurable switch points and variable guard periods, the same basic frame structure can be adapted to support different uplink-downlink ratios and interference conditions, making the system multi-functional without requiring separate pre-defined configurations for each scenario.
Data Source
AI summary
A method for configuring a frame structure, a network side device and a terminal are provided. A relevant frame structure is modified so that uplink and downlink transmission resources are flexibly adjusted, so as to be adapted to requirements of uplink and downlink services and not be limited to a certain type or certain types of fixed uplink and downlink configurations and GP configurations. The method includes determining a first periodicity and first indication information, wherein the first periodicity is a frame periodicity configured for a carrier or a periodicity in which a uplink transmission appears; the first indication information is used to indicate whether a time-domain transmission resource available for the uplink transmission exists in the first periodicity or not; and, if the time-domain transmission resource exists, indicate a position of the time-domain transmission resource.