5G Small Data Transmission via Pre-configured SSB Resources
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Solution Overview
Problem
Current 5G wireless communication systems face challenges in efficiently supporting small data transmission in inactive states, particularly in managing radio resource control messages and synchronization signal blocks for uplink data transmission, which affects data throughput and resource utilization.
Innovation Solution
The proposed solution involves a method and system where a terminal and base station communicate through a radio resource control message to initiate small data transmission, identifying and utilizing pre-configured uplink resources and synchronization signal blocks, even in inactive states, to facilitate efficient data transfer.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the terminal transmits uplink data in RRC inactive state using synchronized SSB, then data transmission efficiency is improved, but the complexity of managing multiple SSBs and their associated uplink resources increases
Solution Approach 1:
The network pre-configures multiple SSBs with their associated uplink grant resources before the terminal enters inactive state. The terminal stores this configuration information and can immediately use the appropriate pre-configured SSB and uplink resources when data needs to be transmitted, eliminating the need for random access procedures and reducing transmission latency while maintaining manageable complexity through standardized pre-configuration
Solution Approach 2:
The SSB acts as an intermediary that links the terminal in inactive state to the uplink transmission resources. Each SSB is associated with specific uplink grant resources, creating a mapping relationship that simplifies resource allocation. The terminal selects an SSB based on downlink signal quality and uses the associated uplink resources, reducing the complexity of direct resource management
2Productivity
If the system supports small data transmission in inactive state with multiple SSBs, then resource utilization is improved, but the difficulty of detecting and managing associated uplink resources increases
Solution Approach 1:
The uplink resources are segmented and associated with individual SSBs rather than being managed as a single pool. Each SSB has its own dedicated uplink grant resources, creating discrete, easily identifiable resource units. The terminal detects SSBs based on downlink signal quality and automatically identifies the associated uplink resources through standardized mapping rules, reducing the complexity of resource detection and management
Solution Approach 2:
The network performs preliminary configuration of SSB-uplink resource associations before the terminal needs to transmit data. The terminal receives and stores this configuration information in advance, including the mapping between SSB indices and uplink grant resources. When data transmission is needed, the terminal simply refers to the pre-stored configuration, eliminating complex real-time resource detection and allocation procedures
Data Source
AI summary
The present disclosure relates to a communication method and system for converging a 5th-Generation (5G) communication system for supporting higher data rates beyond a 4th-Generation (4G) system with a technology for Internet of Things (IoT). The present disclosure may be applied to intelligent services based on the 5G communication technology and the IoT-related technology, such as smart home, smart building, smart city, smart car, connected car, health care, digital education, smart retail, security and safety services. A method and apparatus for small data transmission are provided.