Preconfigured Uplink Resource Timing Advance Validation
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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 transmitting uplink data efficiently through preconfigured resources.
Innovation Solution
The method involves a user equipment (UE) transmitting uplink data through a preconfigured uplink resource, with the capability to update and validate the timing advance (TA) for efficient data transmission, enabling effective resource management and energy optimization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If uplink data transmission uses traditional scheduling methods, then resource allocation flexibility is maintained, but transmission efficiency and energy consumption are degraded due to frequent scheduling requests and control signaling
Solution Approach 1:
The patent applies preliminary action by pre-configuring uplink resources (PUR) in advance for uplink data transmission. Instead of requesting resources dynamically through scheduling requests, the UE is granted resources beforehand through RRC signaling. This eliminates the need for frequent scheduling requests and control signaling, directly improving transmission efficiency while reducing control complexity.
2Measurement precision
If timing advance (TA) validation is performed frequently, then transmission accuracy is improved, but signaling overhead and processing complexity increase
Solution Approach 1:
The patent applies local quality by validating timing advance accuracy specifically for pre-configured uplink resources rather than all uplink transmissions. The base station determines TA validity based on whether the TA value is appropriate for PUR transmission, applying validation selectively where needed. This maintains transmission accuracy for configured resources while avoiding unnecessary validation overhead for other transmissions.
3Productivity
If preconfigured uplink resources are allocated to all UEs, then uplink transmission efficiency improves, but resource waste occurs when UEs have no data to transmit
Solution Approach 1:
The patent applies periodic action through the periodic expiration and re-validation of timing advance values for pre-configured uplink resources. When a PUR resource becomes inactive or the TA expires, the resource can be released or reconfigured. This periodic mechanism allows efficient utilization when data is present while enabling resource recovery when UEs have no data, balancing transmission efficiency with resource waste prevention.
Data Source
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AI summary
The present discloser is related to a method, by a user equipment (UE), for transmitting uplink data through a preconfigured uplink resource (PUR) in a wireless communication system and a apparatus therefor. The UE receives, from a base station, PUR configuration information including a PUR transmission time, in an RRC connected state (radio resource control connected state), transitions from the RRC connected state to an RRC idle state, determines whether a timing advance (TA) related to uplink transmission timing is valid based on a reference signal received power (RSRP) change of a specific reference signal, wherein the RSRP change is a difference value between a first RSRP value measured based on point A and a second RSRP value measured based on point B, and transmits, to the base station, the uplink data at a first PUR transmission time based on the determination result and the PUR configuration information.