Dynamic TDD Resource Configuration for Asymmetric Traffic
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing communication systems face challenges in dynamically managing the transmission direction of time-frequency resources due to asymmetry between uplink and downlink services, which limits flexibility in adapting to changing service requirements, especially in evolving networks with smaller cell radii and varying terminal device connections.
Innovation Solution
The method involves configuring transmission directions of time-frequency-space resources by dividing them into smaller or larger units such as slots, mini-subframes, or OFDM symbols, and allowing variable configurations in the space domain, enabling flexible allocation of uplink and downlink resources based on dynamic service demands through the use of type 1 and type 2 subframes and a new type of DCI that includes configuration information for different resource units.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If fixed paired spectrums and fixed uplink and downlink slot allocation are used, then system stability is maintained, but adaptability to dynamic service asymmetry deteriorates
Solution Approach 1:
The patent implements dynamic TDD configuration where the uplink-downlink slot allocation can be flexibly adjusted based on real-time service asymmetry. The base station can dynamically switch between different TDD configuration modes (configuration 0-6) to adapt to changing traffic patterns, transforming the static resource allocation into a dynamic system that responds to service demands.
Solution Approach 2:
The patent changes the configuration parameters of TDD slots to adapt to service asymmetry. By modifying the uplink-downlink slot configuration parameters (different TDD configurations with varying numbers of uplink and downlink slots), the system can optimize resource allocation for different service scenarios without changing the fundamental system architecture.
2Adaptability or versatility
If seven fixed TDD configuration modes are used, then interference management is simplified, but flexibility in meeting dynamic service requirements deteriorates
Solution Approach 1:
The patent introduces dynamic switching between different TDD configuration modes based on service requirements. The base station can select from seven predefined TDD configurations (0-6) and dynamically adjust the configuration to match current traffic patterns, enabling flexible resource allocation while maintaining manageable interference through standardized configuration sets.
Solution Approach 2:
The patent pre-defines seven TDD configuration modes that cover various uplink-downlink slot ratios. These preliminary configurations are established in advance to handle different service scenarios, allowing the system to quickly adapt to changing requirements by selecting from pre-prepared configurations rather than creating new ones in real-time.
3Productivity
If static or semi-static configuration notification is used, then terminal device implementation is simplified, but responsiveness to service changes deteriorates
Solution Approach 1:
The patent implements dynamic configuration updates where the base station can notify terminal devices of TDD configuration changes through downlink control information (DCI). This allows the system to respond quickly to service changes by updating configurations in real-time, transforming the static configuration approach into a dynamic one that maintains both responsiveness and implementation simplicity.
Data Source
Figure 1
Figure 2~3
Figure 4
AI summary
This application provides a method for configuring a transmission direction of a time-frequency resource, and an apparatus. A terminal device receives first configuration information sent by a first access network device and/or second configuration information sent by a second access network device, and transmits data based on the first configuration information and/or the second configuration information. The first configuration information includes configuration information of a transmission direction of the first access network device in at least one resource unit, the second configuration information includes configuration information of a transmission direction of the second access device in at least one resource unit, and the at least one resource unit includes at least one of a frequency domain unit, a time domain unit, and a space domain unit. In this method, one cycle includes an unlimited quantity of resource units and may include more types of resource units, and different types and different quantities of resource units correspond to more distribution manners, in other words, configuration modes or structures are also more diversified. In this way, configuration of a transmission direction of a time-frequency-space resource becomes more flexible, and a dynamically changing service requirement can be met.