Grant-Free Uplink Resource Management in Disconnected Wireless States
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional wireless communication systems lack a mechanism for grant-free uplink transmissions by user equipment (UE) when operating in a disconnected state, as resources configured for autonomous uplink transmissions are not usable in disconnected states like RRC idle or inactive modes.
Innovation Solution
The described techniques enable higher-layer management of resources for grant-free uplink transmissions by configuring resources for UE during connected states, which can be used in disconnected states through a connection release message with an explicit or implicit resource indicator, allowing UE to perform autonomous uplink transmissions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If resources are configured for autonomous uplink transmissions during connected state, then resource management efficiency is improved, but the resources cannot be used when UE transitions to disconnected state
Solution Approach 1:
The patent applies preliminary action by configuring uplink resources for the UE during the connected state, specifically in the RRC connection release message, so that when the UE transitions to disconnected state, the resources are already prepared and can be immediately used without requiring reconfiguration. This resolves the contradiction by ensuring resource management efficiency during connected state while enabling resource usability in disconnected state through advance configuration.
2Reliability
If grant-free uplink transmission is enabled in disconnected state, then communication continuity is improved, but resource allocation complexity increases
Solution Approach 1:
The patent applies universality by designing the RRC connection release message to serve dual purposes: it both releases the RRC connection (transitioning UE to disconnected state) and simultaneously configures uplink resources for grant-free transmission. This multi-functionality approach enables communication continuity in disconnected state while avoiding additional complexity by consolidating resource allocation within the existing connection release procedure.
3Productivity
If resource configuration is performed during connected state for disconnected state usage, then access control efficiency is improved, but signaling overhead increases
Solution Approach 1:
The patent applies merging by combining the RRC connection release signaling with the uplink resource configuration signaling into a single RRC connection release message. This consolidation improves access control efficiency by ensuring resources are properly allocated before disconnection while minimizing signaling overhead by eliminating the need for separate resource configuration messages that would otherwise be required.
Data Source
AI summary
Methods, systems, and devices for wireless communications are described. A user equipment (UE) may receive a connection release message, the connection release message including a resource indicator indicating that a set of resources are to be used for grant-free uplink transmissions by the UE while operating in a disconnected state. The UE may transition from a connected state to a disconnected state based at least in part on the connection release message. The UE may perform, while operating in the disconnected state, the grant-free uplink transmissions using the set of resources.