Configured Grant PUSCH Resources for Low Mobility UE Uplink
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current wireless communication systems face challenges in optimizing uplink transmission power consumption and resource allocation for User Equipment (UE) devices, particularly in idle and connected modes, especially for low mobility UEs, where accurate timing advance information is limited, leading to inefficiencies in resource utilization and increased power consumption.
Innovation Solution
The design introduces configured grant (CG) physical uplink shared channel (PUSCH) resources, allowing UEs to perform uplink transmissions using preconfigured resources with valid timing advance information, even in idle mode, and enables the reuse of resource configurations from connected mode to idle mode, reducing the need for frequent random access procedures and optimizing power control.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If UEs perform random access procedures to obtain timing advance information, then uplink transmission timing accuracy is improved, but power consumption and access delay increase
Solution Approach 1:
The network pre-configures uplink resources and timing advance information to UEs before they need to transmit data. This preliminary configuration eliminates the need for UEs to perform random access procedures just to obtain timing advance information, thereby reducing power consumption while maintaining timing accuracy.
Solution Approach 2:
UEs in idle mode can autonomously use the pre-configured timing advance information and uplink resources without needing to initiate random access procedures. This self-service capability allows UEs to maintain uplink transmission capability independently, reducing unnecessary power consumption from access procedures.
2Use of energy by moving object
If UEs transition to idle mode to save power, then power consumption is reduced, but uplink transmission capability and resource access are degraded
Solution Approach 1:
The patent creates a universal uplink resource configuration that works across both connected and idle modes. By configuring uplink resources that can be used in both states, the system maintains uplink transmission capability in idle mode without requiring full connected mode functionality, thus preserving adaptability while reducing power consumption.
Solution Approach 2:
The network performs preliminary configuration of uplink resources and timing advance information before the UE transitions to idle mode. This pre-configuration ensures that when the UE enters idle mode, it already possesses the necessary resources and parameters to perform uplink transmissions, maintaining capability while enabling power savings.
3Measurement precision
If UEs frequently access the network to update timing advance information, then timing accuracy is maintained, but signaling overhead and network resource utilization increase
Solution Approach 1:
The network provides timing advance information in advance during the connection setup or reconfiguration phase. This preliminary provision of timing advance information eliminates the need for frequent updates and signaling exchanges, reducing signaling overhead while maintaining timing accuracy for the duration of the pre-configured resources.
Solution Approach 2:
The patent establishes continuous uplink transmission capability through pre-configured resources that remain valid across mode transitions. This continuity allows UEs to maintain uplink functionality without intermittent interruptions for random access procedures, reducing signaling overhead while sustaining timing accuracy.
Data Source
AI summary
Technology for a low mobility user equipment (UE) operable to perform uplink (UL) transmissions using configured grant (CG) physical uplink shared channel (PUSCH) resources is disclosed. The UE can decode a CG PUSCH resource configuration from an eNodeB while the low mobility UE is in a radio resource control (RRC) connected state. The CG PUSCH resource configuration can indicate CG PUSCH resources for the low mobility UE after the low mobility UE transitions from the RRC connected state to an RRC idle state. The UE can transition from the RRC connected state to the RRC idle state. The UE can encode data packets for transmission over a PUSCH to the eNodeB using the CG PUSCH resources while the low mobility UE is in the RRC idle state.