Pre-configured Uplink Resources for Idle State Power Efficiency
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Solution Overview
Problem
Current wireless communication technologies face challenges in reducing power consumption of User Equipment (UE) in idle states, particularly in NB-IoT and MTC, due to inefficient uplink resource management and frequent wake-up signals, leading to increased power usage.
Innovation Solution
The method involves configuring and managing pre-configured uplink resources and implementing UE-group-based wake-up signaling to optimize power usage by allowing UE to transmit data without entering a connected state and reducing unnecessary wake-ups.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If UE enters RRC connected state to transmit uplink data, then reliable data transmission is achieved, but power consumption increases and transmission efficiency decreases
Solution Approach 1:
The network pre-configures uplink resources for UE in idle state before data transmission is needed. When UE has uplink data to send, it can directly use these pre-configured resources without entering RRC connected state, thereby reducing power consumption while ensuring reliable transmission through network-controlled resource allocation
2Loss of energy
If UE uses EDT mechanism to transmit small data packets, then signaling overhead is reduced and power consumption decreases, but uplink transmission efficiency for larger data is limited
Solution Approach 1:
The system dynamically adapts the uplink transmission mode based on data size and channel conditions. For small data packets, UE uses EDT mechanism to minimize power consumption. For larger data or better channel conditions, UE can use pre-configured uplink resources in idle state or transition to RRC connected state, thereby optimizing the balance between power consumption and transmission efficiency
3Reliability
If UE monitors paging messages frequently in coverage enhanced state, then paging detection reliability is improved, but power consumption increases significantly
Solution Approach 1:
Instead of requiring UE to monitor all paging occasions fully, the system uses wake-up signals that UE checks at specific moments. If the wake-up signal indicates no paging, UE can skip monitoring subsequent paging messages and return to sleep state, thereby reducing power consumption while maintaining reliable paging detection through the wake-up signal mechanism
4Reliability
If UE performs random access procedure or RRC connection establishment to transmit uplink data, then uplink synchronization is achieved, but transmission delay increases and power consumption rises
Solution Approach 1:
The network performs uplink synchronization and resource configuration in advance during RRC connected state, then maintains this configuration for UE in idle state. When UE needs to transmit data, it can directly use the pre-synchronized uplink resources without performing random access or connection establishment, thereby reducing transmission delay while maintaining uplink synchronization through the pre-configured resources
Data Source
AI summary
Provided in the present disclosure are a method executed by user equipment and user equipment, comprising: receiving an RRC message containing a pre-configured uplink resource configuration, the RRC message comprising a message related to an RRC connection configured by a base station, and the user equipment determining, according to carrier information in the pre-configured uplink resource configuration, whether the pre-configured uplink resource configuration is related to an anchor carrier or a non-anchor carrier.