Dynamic PUCCH Resource Allocation for 5G Coverage Extension

Solution Overview

Problem

In 5G wireless communication systems, the link budget for the physical uplink control channel (PUCCH) is limited due to increased noise power when additional resources are allocated, and existing resource allocation methods do not effectively address varying coverage extension levels for user equipment (UEs) at different locations within a cell.

Innovation Solution

Dynamic allocation of a different number of orthogonal frequency-division multiplexing (OFDM) symbols for PUCCH transmission, along with resource mapping rules to derive PUCCH resources across multiple OFDM symbols, allowing for time-division multiplexing (TDM) or frequency-division multiplexing (FDM) schemes based on coverage extension levels, and configuration through higher-layer signaling or control channels.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Volume of moving object

If additional resources are allocated for PUCCH transmission to improve coverage extension, then coverage extension is improved, but noise power increases and link budget deteriorates

Engineering Contradiction:

Improvecoverage extensionVSAvoidnoise power

Core Design Contradiction:

Volume of moving objectVSObject-affected harmful factors

Solution Approach 1:

The patent implements dynamic resource allocation where the number of OFDM symbols allocated for PUCCH transmission varies based on coverage extension levels. UEs at different locations receive different resource allocations (1 symbol for normal coverage, 2-4 symbols for extended coverage), allowing the system to adapt resource usage to actual coverage needs without uniformly increasing noise power across all UEs

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The patent applies local quality by providing different resource allocation configurations to different UEs based on their specific coverage requirements. Each UE receives customized PUCCH resource allocation (different numbers of OFDM symbols) according to its coverage extension level, ensuring that only UEs needing extended coverage receive additional resources while maintaining efficient resource usage for others

Inventive Principle:

Principle #3Local quality

2Adaptability or versatility

If fixed resource allocation is used for PUCCH, then device complexity is reduced, but adaptability to different coverage extension levels deteriorates

Engineering Contradiction:

Improveadaptability to coverage extension levelsVSAvoidresource allocation complexity

Core Design Contradiction:

Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The patent changes the parameter of OFDM symbol allocation dynamically based on coverage extension levels. By modifying the number of symbols (1, 2, 3, or 4) allocated for PUCCH transmission according to UE-specific coverage requirements, the system achieves high adaptability while maintaining relatively simple device complexity through standardized allocation rules defined by the base station

Inventive Principle:

Principle #35Parameter changes

3Reliability

If more OFDM symbols are allocated for PUCCH to improve link budget, then link budget is improved, but resource allocation complexity increases

Engineering Contradiction:

Improvelink budgetVSAvoidresource allocation complexity

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The patent implements dynamic resource allocation where the number of OFDM symbols allocated for PUCCH transmission varies based on coverage extension levels. UEs at different locations receive different resource allocations (1 symbol for normal coverage, 2-4 symbols for extended coverage), allowing the system to adapt resource usage to actual coverage needs without uniformly increasing noise power across all UEs

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The patent applies local quality by providing different resource allocation configurations to different UEs based on their specific coverage requirements. Each UE receives customized PUCCH resource allocation (different numbers of OFDM symbols) according to its coverage extension level, ensuring that only UEs needing extended coverage receive additional resources while maintaining efficient resource usage for others

Inventive Principle:

Principle #3Local quality

Data Source

PatentUS11044059B2Dynamic resource allocations and transmission schemes for xPUCCH (5G PUCCH)

Publication Date: 2021.06.22 APPLE INC

AI summary

Disclosed are embodiments related to implementing a dynamic resource allocation and transmission scheme for a fifth generation (5G) physical uplink control channel (xPUCCH) in a 5G system. In particular, embodiments include mechanisms to dynamically allocate resources for the transmission of xPUCCH, and resource mapping schemes for 5G systems supporting more than one symbol allocated for an xPUCCH transmission.