Reference Time Interval Condition for Multi-Carrier Peak Data Rate

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Solution Overview

Problem

The New Radio (NR) standard faces challenges in defining peak data rate and its implications on scheduling decisions, particularly due to flexible transmission durations and bandwidths, which are not clearly addressed in existing technologies, leading to difficulties in managing extreme peak rates across multiple carriers with different processing timelines.

Innovation Solution

A method is introduced where a network entity, such as user equipment (UE), uses a condition based on a reference time interval to restrict the transport block size by calculating the scheduled transport block size as a product of data rate and duration of the shared channel, incorporating a scaling factor and numerology to manage peak data rates effectively across multiple carriers.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If flexible transmission durations and bandwidths are used to support multiple services (eMBB, URLLC, MTC), then adaptability is improved, but device complexity increases due to difficulty in defining peak data rate and scheduling decisions

Engineering Contradiction:
ImproveadaptabilityVSAvoiddevice complexity
Core Design Contradiction:
Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The patent applies parameter changes by introducing a reference time interval parameter and a reference number of information bits parameter to define peak data rate. By changing the parameters used for data rate definition from flexible variable durations to a standardized reference interval, the system maintains adaptability for multiple services while reducing the complexity of scheduling decisions and peak data rate calculations.

Inventive Principle:
Principle #35Parameter changes

2Speed

If shorter transmission time intervals are used to reduce latency, then speed is improved, but manufacturing precision deteriorates due to difficulty in defining peak data rate implications on scheduling decisions

Engineering Contradiction:
ImprovespeedVSAvoidmanufacturing precision
Core Design Contradiction:
SpeedVSManufacturing precision

Solution Approach 1:

The patent applies preliminary action by pre-defining a reference time interval and establishing a standardized method for calculating reference number of information bits before actual scheduling decisions are made. This preliminary framework enables precise definition of peak data rate even when using shorter transmission time intervals for low latency services like URLLC, ensuring scheduling accuracy without compromising speed.

Inventive Principle:
Principle #10Preliminary action

3Productivity

If multiple carriers with different processing timelines are used to increase data rate, then productivity is improved, but device complexity increases due to difficulty in managing extreme peak rates

Engineering Contradiction:
ImproveproductivityVSAvoiddevice complexity
Core Design Contradiction:
ProductivityVSDevice complexity

Solution Approach 1:

The patent applies segmentation by dividing the multi-carrier data rate management into separate evaluations for each carrier based on their individual processing timelines. By calculating the reference number of information bits for each carrier separately using their specific processing characteristics, the system achieves high productivity through multiple carriers while reducing device complexity by avoiding the need to manage extreme peak rates across all carriers simultaneously.

Inventive Principle:
Principle #1Segmentation

Data Source

PatentUS12015478B2Defining a condition based on a reference time interval
Publication Date: 2024.06.18 TELEFONAKTIEBOLAGET LM ERICSSON (PUBL)
  • US12015478B2 patent drawing
  • US12015478B2 patent drawing
  • US12015478B2 patent drawing

AI summary

A method performed by a network entity in which the method includes transmitting or receiving a transmission of data, wherein the transmission is scheduled with a Modulation and Coding Scheme, MCS, level indicated by an MCS index, IMCS, and wherein the transmitting or receiving is based on a first condition being used for a first subset of MCS levels being a subset of all possible MCS levels.