LTE-A SPS C-RNTI Validation via Primary Component Carrier

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Solution Overview

Problem

In LTE-A wireless communication systems, the reuse of Semi-Persistent Scheduling C-RNTI across different component carriers leads to resource misallocation, where a UE may use resources intended for another UE configured with the same C-RNTI and secondary component carrier as primary, causing resource misuse.

Innovation Solution

A method and device for handling Semi-Persistent Scheduling C-RNTI in LTE-A systems, where the UE performs a Physical Downlink Control Channel (PDCCH) validation process and determines the validity of SPS information based on whether it is received on the primary component carrier, ensuring that resources are not misallocated by decoding CRC parity bits accordingly.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Quantity of substance

If Semi-Persistent Scheduling C-RNTI is reused across different component carriers to resolve C-RNTI shortage, then C-RNTI availability is improved, but resource allocation reliability deteriorates due to potential resource misallocation between UEs

Engineering Contradiction:

ImproveC-RNTI availabilityVSAvoidresource allocation reliability

Core Design Contradiction:

Quantity of substanceVSReliability

Solution Approach 1:

The patent applies local quality by making the SPS information validation rule specific to the primary component carrier location. The UE is configured to determine SPS information valid only when received on the primary component carrier, creating a localized validation rule that distinguishes between different component carrier contexts. This resolves the contradiction by enabling C-RNTI reuse across carriers while preventing resource misallocation through location-specific validation.

Inventive Principle:

Principle #3Local quality

2Adaptability or versatility

If the UE validates SPS information received on secondary component carriers, then resource utilization flexibility is improved, but resource misallocation risk increases due to C-RNTI collision with other UEs

Engineering Contradiction:

Improveresource utilization flexibilityVSAvoidresource misallocation risk

Core Design Contradiction:

Adaptability or versatilityVSObject-affected harmful factors

Solution Approach 1:

The patent applies preliminary anti-action by pre-configuring the UE with a validation rule that prevents processing of SPS information on secondary component carriers. This preliminary restriction blocks the potential harmful effect of resource misallocation before it can occur, while still allowing flexible resource utilization on the primary component carrier where the UE is the intended recipient.

Inventive Principle:

Principle #9Preliminary anti-action

3Device complexity

If the UE processes all SPS information regardless of component carrier, then system complexity is reduced, but resource allocation accuracy deteriorates due to inability to distinguish intended resources

Engineering Contradiction:

Improvevalidation process complexityVSAvoidresource allocation accuracy

Core Design Contradiction:

Device complexityVSMeasurement precision

Solution Approach 1:

The patent applies preliminary action by pre-configuring the UE with knowledge of which component carrier is its primary component carrier and establishing a validation rule before SPS information reception. This preliminary configuration enables simple validation logic (check if received on primary carrier) while maintaining high resource allocation accuracy, avoiding both complex processing and inaccurate allocation.

Inventive Principle:

Principle #10Preliminary action

Data Source

PatentUS8873483B2Method of handling semi-persistent scheduling cell radio network temporary identifier and related communication device

Publication Date: 2014.10.28 HTC CORP

AI summary

A method of handling Semi-Persistent Scheduling (SPS) Cell Radio Network Temporary Identifier (C-RNTI) for a mobile device configured with a primary component carrier, at least one secondary component carrier and an SPS C-RNTI in a wireless communication system is disclosed. The method comprises steps of performing a Physical Downlink Control Channel (PDCCH) validation process for an SPS information; and determining the SPS information is valid if the PDCCH validation process is valid and the SPS information is received on the primary component carrier.