Uplink Configured Grant HARQ Timer Segmentation
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Solution Overview
Problem
In wireless communication systems, managing multiple active configured grants simultaneously leads to challenges in allocating Hybrid Automatic Repeat Request (HARQ) identifiers (IDs) and timers, causing potential collisions and confusion in HARQ processes.
Innovation Solution
The described techniques involve configuring timers and allocating HARQ IDs for multiple configured grants, allowing user equipment (UE) to manage and validate uplink transmission occasions based on the status of these timers and identifiers, ensuring that HARQ processes do not collide by associating timers with specific HARQ IDs and configured grants.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If multiple configured grants are actively used by a UE simultaneously, then uplink transmission capacity and resource utilization are improved, but HARQ process collisions and management complexity increase
Solution Approach 1:
The patent segments HARQ process management by introducing separate timers for each configured grant (first timer for first configured grant, second timer for second configured grant). This segmentation allows independent tracking of HARQ processes for each grant, preventing collisions while maintaining multiple active grants. Each timer operates independently to validate uplink transmission occasions for its associated configured grant without interfering with other grants.
2Reliability
If HARQ IDs are allocated to multiple configured grants, then uplink transmission reliability is improved through HARQ processes, but the likelihood of HARQ ID collisions increases
Solution Approach 1:
The patent applies local quality by associating specific timer characteristics with each configured grant. The first timer is specifically associated with the first configured grant and the second timer with the second configured grant. This localized association ensures that timer validation and HARQ ID allocation are grant-specific, preventing cross-grant collisions while maintaining the reliability benefits of HARQ processes for each individual grant.
3Measurement precision
If timers are configured for HARQ IDs associated with multiple configured grants, then uplink transmission validation accuracy is improved, but system complexity and resource overhead increase
Solution Approach 1:
The patent implements preliminary action by configuring and starting timers in advance for each configured grant before uplink transmissions occur. The first timer is started in advance for the first configured grant and the second timer for the second configured grant. This preliminary timer configuration enables proactive validation of uplink transmission occasions, ensuring accurate tracking and prevention of HARQ collisions before they can occur, while maintaining organized timer management.
Data Source
AI summary
Methods, systems, and devices for wireless communications are described. Techniques are described herein for managing timers for hybrid automatic repeat request (HARQ) processes associated with multiple configured grants that are active at the same time. Techniques are also described herein for allocating HARQ identifiers (IDs) to HARQ processes associated with multiple configured grants that are active at the same time. A user equipment (UE) may configure timers to be associated with a HARQ ID and a configured grant. A base station or UE may include indicators of the configured grants associated with a HARQ process when exchanging signaling about the HARQ process. A UE may allocate HARQ IDs to multiple configured grants to reduce a likelihood that HARQ processes collide.