Random Access Response Differentiation via UE Type Identification

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Solution Overview

Problem

Current wireless communication systems face challenges in differentiating random access responses (RARs) effectively across various user equipment (UE) types, leading to inefficient resource utilization and increased power consumption as UEs with limited capabilities attempt to decode RARs intended for other types.

Innovation Solution

Incorporating information that differentiates RARs based on UE type, allowing UEs to decode only intended RARs by using unique bandwidth configurations, cyclic redundancy checks (CRCs), interleaving patterns, and scrambling identifiers, thereby optimizing resource usage and conserving power.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If UEs decode all received RARs regardless of type, then all RARs can be processed, but power consumption increases and resource utilization becomes inefficient

Engineering Contradiction:

ImproveRAR processing completenessVSAvoidUE power consumption

Core Design Contradiction:

ReliabilityVSUse of energy by moving object

Solution Approach 1:

The patent applies preliminary action by embedding differentiation information (such as UE type identifiers, bandwidth configuration indicators, or CRC masks) in the RAR message structure before transmission. This allows the UE to预先 identify whether a RAR is intended for its type before attempting full decoding, thereby avoiding unnecessary processing of irrelevant RARs and reducing power consumption while maintaining complete processing of relevant RARs.

Inventive Principle:

Principle #10Preliminary action

2Reliability

If UEs attempt to decode RARs not intended for their type, then all RARs are processed, but resource utilization becomes inefficient

Engineering Contradiction:

ImproveRAR processing completenessVSAvoidResource utilization efficiency

Core Design Contradiction:

ReliabilityVSProductivity

Solution Approach 1:

The patent embeds differentiation information in the RAR structure that enables UEs to quickly identify intended RAR types before full decoding. This preliminary identification mechanism ensures that only RARs matching the UE type are fully processed, improving resource utilization efficiency while maintaining processing completeness for relevant messages.

Inventive Principle:

Principle #10Preliminary action

3Productivity

If RAR differentiation information is added, then RAR processing efficiency improves, but message structure complexity increases

Engineering Contradiction:

ImproveRAR processing efficiencyVSAvoidMessage structure complexity

Core Design Contradiction:

ProductivityVSDevice complexity

Solution Approach 1:

The patent merges differentiation information with existing RAR message structures by utilizing available fields such as CRC masks, bandwidth configuration indicators, or UE type identifiers that are already part of the standard RAR format. This integration approach improves processing efficiency through differentiation while minimizing additional structural complexity by reusing existing message elements rather than adding separate differentiation fields.

Inventive Principle:

Principle #5Merging (Combining)

Data Source

PatentUS20220338265A1Random access response differentiation

Publication Date: 2022.10.20 QUALCOMM INC

AI summary

Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may receive a random access response (RAR). The UE may decode the RAR based at least in part on information that differentiates RARs according to UE type. Numerous other aspects are described.