ARO Values in TDD PUCCH Resource Allocation
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Solution Overview
Problem
Current wireless communication systems, particularly in Time Division Duplex (TDD) mode, face challenges in defining Ack/Nack resource offset (ARO) values for hybrid automatic repeat request (HARQ) acknowledgments, leading to inefficiencies in PUCCH resource allocation and increased overhead, as existing values are not dynamically scalable according to load.
Innovation Solution
Defining ARO values in TDD with a first set containing negative values to offset HARQ-ACK transmission to corresponding downlink subframes and a second set with values between −2 and 2, allowing for dynamic compression of PUCCH resources across multiple DL subframes, thereby enabling flexible resource allocation and reducing overhead.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If existing ARO values are used in TDD mode, then HARQ acknowledgments can be transmitted, but PUCCH resource allocation becomes inefficient and overhead increases due to lack of dynamic scalability
Solution Approach 1:
The patent introduces two sets of ARO values that enable dynamic adjustment of PUCCH resource allocation based on traffic load conditions. The first set (containing negative values) is used when load is high to compress resources to another downlink subframe, while the second set (values between -2 and 2) is used when load is low, allowing the system to adapt resource allocation dynamically rather than using fixed values
Solution Approach 2:
The patent changes the parameter values of ARO from fixed existing values to two configurable sets. By selecting different ARO value sets based on traffic conditions, the system can change the resource allocation parameters dynamically, achieving scalable PUCCH resource allocation that adapts to varying load conditions
2Adaptability or versatility
If ARO values compress HARQ acknowledgments to PUCCH resources corresponding to another downlink subframe, then resource allocation flexibility improves, but resource determination complexity increases
Solution Approach 1:
The patent segments the ARO values into two distinct sets with different characteristics. The first set contains negative values for compression scenarios, while the second set contains values between -2 and 2 for normal scenarios. This segmentation allows the system to handle different resource allocation scenarios with appropriate value sets, improving flexibility while managing complexity through structured organization
3Productivity
If fixed PUCCH resources are allocated for HARQ acknowledgments, then resource determination is simple, but resource utilization efficiency decreases under varying load conditions
Solution Approach 1:
The patent transforms the static resource allocation mechanism into a dynamic one by introducing two sets of ARO values that can be selected based on traffic load. This allows the system to optimize resource utilization efficiency under varying conditions while maintaining a relatively simple determination mechanism through predefined value sets rather than complex real-time calculations
Data Source
AI summary
Methods, apparatuses, and computer program products for defining ARO values in TDD are provided. One method includes defining acknowledgement (Ack)/negative acknowledgement (Nack) resource offset (ARO) values in time division duplex (TDD) with a first set of values and a second set of values. The first set of values contains negative values and is used to offset hybrid automatic repeat request (HARQ) acknowledgment (ACK) resource determination so that HARQ-ACK is transmitted on physical uplink control channel (PUCCH) resources corresponding to another downlink subframe, and the second set of values contains values between −2 and 2.