Two-Step Control Signaling for 5G Retransmission Decoding
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Solution Overview
Problem
The challenge in wireless communication systems, particularly in 5G, is the need for efficient management of control information and data transmission to support various services, including beamforming, MIMO, and advanced coding modulations, while ensuring seamless communication between terminals.
Innovation Solution
A method and apparatus for transmitting and receiving control information in two steps, involving decoding first and second control information, calculating resource allocation sizes, and managing a soft buffer to enable efficient communication between terminals.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If control information is transmitted in a single step, then transmission speed is improved, but the receiving terminal cannot properly decode the control information when frequency resource sizes differ between initial transmission and retransmission
Solution Approach 1:
The control information transmission is divided into two separate steps: first control information is transmitted before the transport block, and second control information is transmitted after the transport block. This segmentation allows the receiving terminal to properly decode control information by first obtaining the initial control data and then the supplementary control data, ensuring reliable decoding even when frequency resource sizes differ between initial transmission and retransmission.
2Productivity
If the frequency resource size for initial transmission is made larger, then data transmission capacity is improved, but the soft buffer size required at the receiving terminal increases
Solution Approach 1:
The frequency resource allocation is made dynamic and adaptive. The base station determines the frequency resource size for initial transmission based on the actual data size that needs to be transmitted. When the data size is small, a smaller frequency resource is allocated; when the data size is large, a larger frequency resource is allocated. This dynamic adjustment allows the system to maximize data transmission capacity while minimizing the required soft buffer size at the receiving terminal.
3Reliability
If retransmission is allowed with different frequency resource sizes, then communication reliability is improved, but the complexity of resource allocation calculation increases
Solution Approach 1:
The system changes the parameter of frequency resource size based on transmission requirements. For initial transmission, the frequency resource size is set to accommodate the entire transport block. For retransmission, the frequency resource size can be adjusted based on whether the retransmission is for the same or different data. This parameter change approach simplifies the resource allocation calculation by using clear rules: initial transmission uses full resources, while retransmission uses resources proportional to the actual data size, thereby improving communication reliability without excessive complexity.
Data Source
AI summary
The present disclosure relates to: a communication technique combining IoT, V2X, or sidelink technology with a 5G communication system supporting higher data transmission rates than 4G systems; and a system therefor. The present disclosure may be applied to intelligent services (for example, smart homes, smart buildings, smart cities, smart cars or connected cars, healthcare, digital education, retail, security and safety-related services, and the like) on the basis of 5G communication technology and IoT, V2X or sidelink-related technologies. Furthermore, the present disclosure relates to a method and device for transmitting and receiving control information and data in a wireless communication system.