Transport Block Size Determination for 5G Resource Scheduling
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The 5G wireless communications system requires more flexible resource scheduling due to its support for diverse service types and larger spectrum range, which is not adequately addressed by the existing LTE system's method for determining transport block size (TBS), resulting in poor scalability and inflexibility.
Innovation Solution
A method for determining TBS that involves receiving downlink control information, determining modulation order and code rate based on a mapping relationship set, and calculating TBS based on the modulation order, code rate, number of time-frequency resources, and transport layers, allowing for more flexible resource allocation and adaptation to different service requirements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the LTE system's method for determining TBS is used, then the determination process is simple and based on fixed assumptions, but the flexibility and scalability are poor for 5G systems with diverse service types and larger spectrum range
Solution Approach 1:
The patent applies dynamics by making the TBS determination process adaptive rather than fixed. The network device dynamically configures multiple TBS determination modes (first mode using predefined tables, second mode using formulas) and resource allocation parameters based on real-time service requirements. The terminal device dynamically selects the appropriate determination mode based on DCI indication, enabling flexible adaptation to different 5G service types while maintaining operational simplicity through automated mode selection.
Solution Approach 2:
The patent implements parameter changes by introducing configurable parameters including multiple TBS determination modes, dynamic resource allocation quantities, and adjustable time-frequency resource configurations. The network device can change these parameters based on service requirements (e.g., eMBB vs. uRLLC), and the terminal device adjusts its TBS calculation accordingly. This allows the system to optimize between simplicity and flexibility by changing parameters rather than redesigning the entire determination mechanism.
2Adaptability or versatility
If fixed resource allocation assumptions are used as in LTE, then the determination process is straightforward, but it cannot accommodate the varying number of resources available in each PRB for 5G services
Solution Approach 1:
The patent makes resource allocation dynamic by allowing the network device to configure different resource allocation quantities for different services and time-frequency resources. Instead of assuming fixed 120 RE per PRB as in LTE, the system dynamically determines the actual number of available resources based on service type, modulation scheme, and resource allocation pattern. The terminal device receives this dynamic configuration through DCI and adjusts its TBS calculation accordingly.
Solution Approach 2:
The patent changes the resource quantity parameter from a fixed value to a configurable variable. The network device can set different resource allocation quantities (e.g., number of RE per PRB, number of PRBs allocated) based on service requirements. This parameter change enables the system to accommodate varying resource availability for different 5G services while maintaining a unified TBS determination framework that adapts to the configured parameters.
3Productivity
If a unified TBS determination method is used for all service types, then the system is simple to operate, but it cannot meet the diverse performance requirements of different 5G services
Solution Approach 1:
The patent segments the TBS determination process into multiple modes: a first mode using predefined TBS tables for simple scenarios, and a second mode using calculation formulas for complex scenarios with diverse service requirements. Each mode is optimized for specific service types and performance requirements. The network device configures which mode to use based on service type, and the terminal device executes the appropriate mode, achieving both operational simplicity and service-specific optimization.
Solution Approach 2:
The patent creates a universal TBS determination framework that can handle multiple service types (eMBB, uRLLC, mMTC) and different resource allocation scenarios through a single configurable system. The framework includes multiple determination modes and configurable parameters that can be adjusted to meet different service requirements. This multi-functional design allows the same basic framework to serve diverse 5G services without requiring separate determination mechanisms for each service type.
Data Source
Figure 1
Figure 2
Figure 3~5
AI summary
Embodiments of this application disclose a method for determining a transport block size, and an apparatus. The method includes: receiving, by a terminal device, control information sent by a network device, where the control information includes indication information and resource information of a data channel; determining, by the terminal device, a modulation scheme and a code rate based on a mapping relationship set and the indication information, and determining number of time-frequency resources based on the resource information of the data channel; determining, by the terminal device, a first transport block size TBS based on the modulation scheme, the code rate, and the number of time-frequency resources; and decoding, by the terminal device based on the TBS, the data channel carried on the time-frequency resources, or sending, by the terminal device on the time-frequency resources, the data channel based on the TBS. According to the embodiments of this application, efficiency in determining the transport block size can be improved, and therefore transmission efficiency of the data channel can be improved.