Flexible Time Domain Symbol Allocation for Radio Resource Optimization
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In LTE networks, the coexistence of TTI scheduling mode and shorter TTI scheduling mode leads to radio resource waste due to inefficient allocation of time-frequency resources, particularly in scenarios requiring higher bandwidth and lower delays for services like high-definition videos and virtual reality.
Innovation Solution
A data transmission method where a base station sends time domain symbol configuration information to terminals, allowing flexible allocation of time domain symbols within a scheduling period, enabling some symbols to be allocated to one terminal while others are not, and potentially allocated to another terminal, thereby optimizing resource usage based on bandwidth and delay requirements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If TTI scheduling mode is used, then scheduling period is standardized, but radio resource utilization deteriorates due to inability to flexibly allocate resources to different terminals
Solution Approach 1:
The patent segments the scheduling period into multiple time domain symbols, allowing individual symbols to be allocated to different terminals. This segmentation enables flexible resource allocation while maintaining the standardized TTI scheduling framework, resolving the contradiction between operational simplicity and resource utilization efficiency.
Solution Approach 2:
The patent introduces dynamic allocation of time domain symbols within the TTI scheduling period. The base station can dynamically determine which symbols to allocate to which terminals based on service requirements, enabling the system to adapt to varying bandwidth and delay needs while improving overall radio resource utilization.
2Loss of time
If shorter TTI scheduling mode is used, then delay is reduced, but radio resource waste increases due to coexistence with conventional TTI scheduling mode
Solution Approach 1:
The patent applies local quality by allowing different terminals to use different scheduling periods within the same network. Terminals requiring low delay (e.g., virtual reality services) can be allocated shorter TTI schedules, while other terminals use conventional TTI scheduling. This localized differentiation eliminates resource waste caused by uniform scheduling while enabling delay reduction for specific services.
Solution Approach 2:
The patent changes the scheduling period parameter dynamically based on terminal requirements. By adjusting the TTI length and time domain symbol allocation according to service characteristics, the system achieves both delay reduction for time-sensitive services and efficient resource utilization across the network.
3Device complexity
If fixed time-frequency resource allocation is used, then scheduling is simplified, but adaptability deteriorates for services with varying bandwidth and delay requirements
Solution Approach 1:
The patent introduces dynamic resource allocation within the TTI scheduling period, where the base station can flexibly assign time domain symbols to different terminals based on real-time service requirements. This dynamic approach maintains relatively simple scheduling operations while significantly improving adaptability to varying bandwidth and delay needs.
Solution Approach 2:
The patent creates a universal scheduling mechanism that can handle multiple service types with different requirements within the same TTI framework. The time domain symbol allocation method enables the system to serve both delay-sensitive applications (like virtual reality) and standard services, achieving multi-functionality without substantially increasing scheduling complexity.
Data Source
AI summary
This disclosure relates to the mobile communications field, and in particular, to data transmission technologies in the mobile communications field. In a data transmission method, a base station allocates, to a terminal, some of time domain symbols that are used for data transmission and that are in a scheduling period of the terminal, and the terminal performs data transmission based on the allocated time domain symbols. According to the method, time domain symbols in the scheduling period that originally belong to the terminal are punctured, a resource waste caused when the terminal occupies all time domain symbols that are used for data transmission and that are in the scheduling period during scheduling each time can be avoided, so that radio resources can be flexibly allocated based on requirements on delays and bandwidth, thereby improving resource utilization.