Uplink HARQ Process ID Scheduling for Set UL Grants
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Solution Overview
Problem
The increasing demand for high data throughput and diverse communication services in wireless communication systems necessitates efficient use of limited radio resources, particularly in managing uplink and downlink channels to support various services with different requirements, while addressing latency and reliability challenges.
Innovation Solution
A method and system for determining Hybrid Automatic Repeat Request (HARQ) process IDs based on a HARQ process ID interval, allowing efficient transmission and reception of uplink channels by user equipment (UE) and base stations, using a UL grant configuration to optimize resource allocation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the number of UEs served by a BS increases and data volume increases, then communication capacity and service diversity improve, but radio resource efficiency deteriorates due to limited available resources
Solution Approach 1:
The patent segments the uplink channel transmission into multiple transmission occasions within a period, each associated with specific HARQ process IDs. This segmentation allows efficient resource allocation by dividing the limited radio resources into organized time-based segments, improving resource utilization while supporting multiple UEs
Solution Approach 2:
The patent implements dynamic HARQ process ID determination based on transmission occasion indices and configurable parameters. The HARQ process IDs are dynamically assigned using formulas that incorporate transmission occasion indices, periodicity, and configurable intervals, enabling flexible adaptation to varying traffic conditions and service requirements
2Productivity
If HARQ process IDs are determined without a systematic method, then implementation is simpler, but resource allocation efficiency deteriorates leading to increased latency
Solution Approach 1:
The patent performs preliminary determination of HARQ process IDs based on pre-configured parameters including periodicity, HARQ process ID intervals, and starting IDs. By pre-establishing these configurations and using systematic formulas to determine IDs before transmission, the system avoids latency associated with dynamic allocation decisions during transmission occasions
Solution Approach 2:
The system enables self-service through automated HARQ process ID determination using configured parameters and transmission occasion indices. The UE autonomously determines appropriate HARQ process IDs using the formula based on pre-configured settings, eliminating the need for explicit BS assignment for each transmission and reducing signaling overhead
Data Source
AI summary
A UE can receive a UL grant setting for set UL grants. The UE determines hybrid automatic repeat request (HARQ) process identifiers (IDs) for cycles of the set UL grants on the basis of the UL grant setting, and can perform UL channel transmission in at least one of transmission periods corresponding to the set UL grants within the cycles on the basis of the determined HARQ process IDs. Determining the HARQ process IDs for the cycles can include determining start HARQ process IDs of the HARQ process IDs on the basis of HARQ process ID intervals. The HARQ process ID intervals are the minimum differences among the start HARQ process IDs for different cycles.