Time Domain Resource Assignment Extension for Reduced Capability UE

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Solution Overview

Problem

In mobile or wireless telecommunication systems, reduced capability user equipment (UE) face challenges in processing time due to excessive scheduling of radio access response (RAR) physical resource blocks, leading to increased delays in message 3 (Msg3) transmission, which is not efficiently addressed by existing technologies without impacting legacy UE scheduling.

Innovation Solution

The introduction of time domain resource assignment (TDRA) extensions, enabled by a network entity indication, allows reduced capability UE to process messages with extended timing based on a parameter X, without increasing Msg3 transmission delay for legacy UE, by adjusting the K2 parameter in the pusch-TimeDomainAllocationList and configuring additional TDRA tables.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Duration of action of moving object

If time domain resource assignment extension is applied for reduced capability UE, then processing time for RAR is improved, but Msg3 transmission delay increases for legacy UE

Engineering Contradiction:

Improveprocessing timeVSAvoidMsg3 transmission delay

Core Design Contradiction:

Duration of action of moving objectVSLoss of time

Solution Approach 1:

The patent applies different time domain resource assignment characteristics to different UE types. Reduced capability UE receive extended TDRA indications that provide additional processing time, while legacy UE operate with standard TDRA parameters. This localized differentiation resolves the contradiction by tailoring the time resource allocation to specific UE capabilities without universally increasing delay.

Inventive Principle:

Principle #3Local quality

Solution Approach 2:

The patent modifies the K2 parameter in the pusch-TimeDomainAllocationList specifically for reduced capability UE through network entity indication. By changing this timing parameter selectively based on UE capability, the system grants extended processing time where needed while maintaining standard timing for legacy devices, thus resolving the time delay contradiction.

Inventive Principle:

Principle #35Parameter changes

2Reliability

If extended TDRA tables are configured for reduced capability UE, then processing capability is improved, but system information block overhead increases

Engineering Contradiction:

Improveprocessing capabilityVSAvoidsystem information block overhead

Core Design Contradiction:

ReliabilityVSQuantity of substance

Solution Approach 1:

The patent segments the TDRA configuration into multiple tables (e.g., first TDRA table, second TDRA table) with different characteristics. Reduced capability UE are configured to use specific extended tables that provide adequate processing time, while legacy UE continue using standard tables. This segmentation provides enhanced processing capability to needed devices without universally increasing system information overhead.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The extended TDRA tables serve multiple functions: they provide standard timing for legacy UE while simultaneously providing extended timing for reduced capability UE. The same PUSCH configuration structure supports both UE types, reducing the need for separate dedicated configurations and thereby controlling system information overhead while maintaining processing capability for reduced capability devices.

Inventive Principle:

Principle #6Universality (Multi-functionality)

3Duration of action of moving object

If K2 parameter is adjusted for reduced capability UE, then processing time is improved, but PUSCH scheduling flexibility is reduced

Engineering Contradiction:

Improveprocessing timeVSAvoidPUSCH scheduling flexibility

Core Design Contradiction:

Duration of action of moving objectVSAdaptability or versatility

Solution Approach 1:

The patent enables dynamic selection of K2 parameter values from the pusch-TimeDomainAllocationList based on UE capability indication. The network entity can adaptively choose appropriate timing values from multiple configured options, allowing reduced capability UE to use larger K2 values for extended processing while legacy UE utilize smaller K2 values for faster scheduling. This dynamic adaptation preserves scheduling flexibility while providing extended processing time where needed.

Inventive Principle:

Principle #15Dynamics

Data Source

PatentUS20240340867A1Time domain resource allocation of random access message for reduced capability devices

Publication Date: 2024.10.10 NOKIA TECHNOLOGIES OY

AI summary

Systems, methods, apparatuses, and computer program products for allowing for larger processing time for reduced capability user equipment without increasing the message 3 transmission delay for legacy user equipment. One method may include a UE receiving at least one time domain resource assignment extension indication from a network entity; determining whether at least one first message early indication is configured and whether time domain resource assignment extension is enabled based on the received at least one time domain resource assignment extension indication; and, upon determining that at least one first message early indication is configured and that time domain resource assignment extension is enabled, determining a timing of a second message based on the at least one time domain resource assignment extension indication and a time parameter associated with the at least one time domain resource assignment extension.