Downlink Control Information HARQ Configuration for Random Access
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Solution Overview
Problem
The ambiguity in random access message transmission in wireless communication systems, particularly due to the absence of hybrid automatic repeat request (HARQ) transmission information and asymmetrical uplink grants, leads to unclear HARQ operations, affecting the proper execution of initial access procedures.
Innovation Solution
The method involves configuring downlink control information with preset values for HARQ-related information, allowing terminals to interpret and respond to random access messages without considering the actual HARQ values, thereby clarifying the HARQ ID and new data indicators, and ensuring proper HARQ operations during initial access.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If downlink control information includes HARQ transmission information for random access response, then HARQ operations can be properly executed, but the complexity of control message structure increases
Solution Approach 1:
The patent applies preliminary action by pre-configuring HARQ-related information fields in the downlink control information with preset values before transmission. This allows the terminal to properly execute HARQ operations during random access without requiring complex additional signaling, as the necessary HARQ parameters are prepared in advance in the control message structure.
2Reliability
If preset values are configured for HARQ-related information in downlink control information, then ambiguity in random access operations is resolved, but the information transmission efficiency decreases
Solution Approach 1:
The patent extracts only the essential HARQ-related information fields from the complete downlink control information and configures them with preset values. This selective approach resolves the ambiguity needed for proper random access operations while minimizing the impact on information transmission efficiency by not unnecessarily complicating the entire control message.
3Ease of operation
If terminals interpret downlink control information without considering actual HARQ values, then initial access procedures are simplified, but HARQ retransmission capabilities are reduced
Solution Approach 1:
The patent introduces preset HARQ values as an intermediary element in the downlink control information. These preset values serve as a mediator that allows terminals to interpret and process the control information for initial access procedures in a simplified manner, while still maintaining the necessary HARQ retransmission capabilities through the structured information fields.
Data Source
AI summary
The present disclosure relates to a communication technique for convergence of a 5G communication system for supporting a higher data transmission rate beyond a 4G system with an IoT technology, and a system therefor. The present disclosure may be applied to an intelligent service (for example, smart home, smart building, smart city, smart car or connected car, health care, digital education, retail business, security and safety-related service, etc.) on the basis of a 5G communication technology and an IoT-related technology. The present disclosure relates to a method and device for effectively transmitting or receiving control information for random access in a communication system. According to various embodiments of the present invention, information related to initial random access can be effectively transmitted and received.