Configured Grant HARQ Timer Handling for Pending TB Retransmission
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In wireless communication systems operating in unlicensed spectrum, issues arise with handling configured grants due to listen-before-talk failures and HARQ process management, leading to inefficiencies and potential loss of pending transmission blocks during activation, reactivation, or deactivation commands.
Innovation Solution
Implementing methods to manage timers and pending transmission blocks associated with non-idle HARQ processes during configured grant activation, reactivation, or deactivation procedures, ensuring flexible resource handling and improved quality of service satisfaction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If configured grant activation/reactivation/deactivation commands are issued, then resource allocation flexibility is improved, but pending transmission blocks in non-idle HARQ processes may be lost
Solution Approach 1:
The patent applies preliminary action by checking whether HARQ processes are in non-idle state before executing configured grant activation, reactivation, or deactivation commands. When a non-idle HARQ process is detected, the system performs preliminary flushing of the corresponding HARQ buffer to preserve pending transmission blocks, thereby preventing data loss while maintaining the flexibility of configured grant management.
2Productivity
If HARQ buffer is flushed upon configured grant command, then resource reuse is improved, but pending transmission blocks are lost
Solution Approach 1:
The system performs preliminary checking of HARQ process states before executing configured grant commands. When non-idle processes are detected, the patent applies preliminary flushing of HARQ buffers to preserve pending transmission blocks. This selective approach allows resource reuse while preventing information loss, resolving the contradiction between productivity and data preservation.
3Productivity
If multiple configured grants are active simultaneously, then resource utilization is improved, but HARQ process management complexity increases
Solution Approach 1:
The patent applies segmentation by dividing the HARQ process management into distinct states (idle and non-idle) and implementing separate handling procedures for each state. When multiple configured grants are active, the system segments the management logic to check and flush only the specific HARQ buffers associated with non-idle processes, thereby simplifying the overall management complexity while maintaining high resource utilization.
Data Source
AI summary
A wireless device operating in a communication network can, responsive to receiving a downlink control indication (“DCI”) command to activate or reactivate a configured grant (“CG”) configuration, control at least one timer associated with a non-idle hybrid automatic repeat request (“HARQ”) process on the CG configuration. The non-idle HARQ process can include a process of retransmitting a transmission block (“TB”) using the CG for which an associated media access control (“MAC”) protocol data unit (“PDU”) has been submitted to lower layers for transmission to a network node, but for which successful reception acknowledgment has not been received from the network node.