Base Station Semi-Static Dynamic Control Information Allocation
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Solution Overview
Problem
In 5G communication systems, base stations face challenges in managing timing and frequency resources for terminal apparatuses using grant-free access, leading to data collisions and increased delay in mMTC and URLLC communications.
Innovation Solution
A base station apparatus and terminal apparatus configuration that includes generating specific control information for individual terminal apparatuses and collective control information, with distinct IDs for detection, enabling semi-static and dynamic radio resource allocation, and allowing data transmission without uplink grants, using semi-static and dynamic grant-free access methods.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If grant-free access is used to allow terminals to transmit data without uplink grants, then delay is reduced and overhead is suppressed, but the base station cannot manage timing and frequency resources effectively, leading to data collisions
Solution Approach 1:
The base station performs preliminary action by pre-configuring semi-static grant-free resources (time, frequency, spatial parameters) for terminals before data transmission. This allows terminals to immediately transmit data without waiting for dynamic scheduling, reducing delay while the base station maintains resource management control through the pre-established configuration
Solution Approach 2:
The base station implements feedback mechanisms to monitor and manage grant-free resource usage. By tracking terminal transmissions and providing feedback signals, the base station can detect and resolve data collisions while maintaining the low-latency benefits of grant-free access, thus balancing reliability with speed
2Reliability
If scheduled access is used to allow the base station to control uplink data transmissions, then resource management is improved, but the amount of control information increases and delay is increased
Solution Approach 1:
The patent extracts the essential resource management functions from dynamic scheduling and places them into semi-static configuration. By separating the time-critical transmission aspect from the management aspect, the system eliminates the need for continuous control information exchange while maintaining resource control, thus reducing overhead and delay
Solution Approach 2:
Resource allocation decisions are made in advance through semi-static configuration rather than dynamically during transmission. This preliminary action eliminates the round-trip time for scheduling requests and grants, significantly reducing delay while the base station retains control over resource distribution
Data Source
AI summary
A base station apparatus for communicating with a terminal apparatus includes: a controller configured to generate first control information specific to the terminal apparatus and second control information addressed to multiple terminal apparatuses, and a receiver configured to receive an uplink physical channel, wherein the receiver receives data which the terminal apparatus transmits without receiving, in the first control information, control information for uplink grant, the first control information indicates semi-static allocation of a radio resource used for transmission of the data, and the second control information indicates dynamic allocation of the radio resource used for transmission of the data.