PUR Configuration Update via DCI in Wireless Uplink
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Solution Overview
Problem
Current mobile communication systems face challenges in managing explosive data traffic, high data rates, numerous connected devices, low latency, and energy efficiency, particularly in uplink transmission through preconfigured resources, which affects the reliability of configuration updates and search space monitoring.
Innovation Solution
A method and apparatus for transmitting uplink signals through a preconfigured uplink resource (PUR) in a wireless communication system, involving PUR configuration updates, monitoring, and resource management, where user equipment receives PUR configuration information, transitions states, and transmits uplink signals based on received DCI, with mechanisms for handling data presence or absence and PUR skipping events.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If uplink transmission uses preconfigured uplink resource (PUR) without continuous scheduling, then energy efficiency and latency are improved, but reliability of configuration updates deteriorates
Solution Approach 1:
The base station transmits PUR configuration information to the UE in advance during RRC connected state, enabling the UE to transition to RRC idle state while maintaining configured PUR resources for later uplink transmission. This preliminary configuration allows the system to benefit from energy savings and low latency while ensuring configuration is established before state transition.
Solution Approach 2:
The patent implements a feedback mechanism where the base station transmits DCI (Downlink Control Information) containing PUR update information to notify the UE of configuration changes. The UE monitors this feedback and updates its PUR configuration accordingly, ensuring reliable configuration updates even in idle state without requiring continuous RRC connected state.
2Adaptability or versatility
If PUR configuration is updated frequently to adapt to changing traffic conditions, then adaptability is improved, but system complexity and overhead increase
Solution Approach 1:
The patent extracts essential configuration update information into a separate DCI message structure that can be transmitted independently of the main RRC configuration. This allows the base station to update PUR parameters (such as time resources, frequency resources, or modulation schemes) without requiring complete reconfiguration, thereby improving adaptability while reducing overall system complexity.
Solution Approach 2:
The PUR configuration is designed to be dynamic and adjustable through periodic updates via DCI messages. The base station can modify PUR parameters in response to changing traffic conditions without establishing a new RRC connection, enabling the system to adapt to varying demands while maintaining a relatively simple and stable overall structure.
3Measurement precision
If UE monitors PUR configuration continuously to ensure reliability, then measurement precision is improved, but energy consumption increases
Solution Approach 1:
Instead of continuous monitoring, the patent implements periodic monitoring where the UE checks for DCI messages containing PUR update information at specific intervals or triggered by certain conditions. This periodic action maintains sufficient measurement precision for configuration reliability while significantly reducing energy consumption compared to continuous monitoring, as the UE can remain in low-power idle state between monitoring cycles.
Data Source
AI summary
According to the present specification, a method for transmitting an uplink signal through a PUR in a wireless communication system comprises: receiving, and in a radio resource control (RRC) connected state, PUR configuration information for uplink signal transmission based on the PUR; transitioning from the RRC connected state to an RRC idle state; receiving, on a first resource of the PUR, a first (DCI) including first PUR update information for updating PUR configuration; and transmitting a first uplink signal on a second resource of the PUR on the basis of whether or not the first DCI has been received, wherein when the terminal successfully receives the first DCI, the first uplink signal is transmitted after the PUR configuration based on the first PUR update information is applied thereto irrespective of the presence or absence of data for uplink transmission on the second resource.