Scheduling Request Buffer Status Indication for Non-Terrestrial Networks

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Solution Overview

Problem

The existing Buffer Status Report (BSR) framework in wireless communication networks is ill-suited for non-terrestrial networks with large propagation delays, leading to outdated or invalid reports and sub-optimal scheduling, resulting in degraded user experience and reduced resource efficiency.

Innovation Solution

A method where User Equipment (UE) transmits a scheduling request (SR) indicating its buffer status to the network node, allowing the network to allocate resources efficiently and reduce delays by granting resources based on the indicated buffer status.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If the existing Buffer Status Report (BSR) framework is used in non-terrestrial networks, then the network can maintain compatibility with traditional terrestrial network protocols, but the reports become outdated or invalid due to large propagation delays, leading to sub-optimal scheduling

Engineering Contradiction:

Improvecompatibility with traditional terrestrial network protocolsVSAvoidvalidity of buffer status reports

Core Design Contradiction:

Adaptability or versatilityVSReliability

Solution Approach 1:

The patent applies preliminary action by having the UE transmit a scheduling request (SR) indicating buffer status before the actual data transmission is scheduled. This early indication allows the network to prepare resource allocation in advance, compensating for the large propagation delays in non-terrestrial networks and preventing the buffer status information from becoming outdated by the time scheduling decisions are made.

Inventive Principle:

Principle #10Preliminary action

2Adaptability or versatility

If the existing BSR framework is used, then network protocol compatibility is maintained, but resource efficiency is reduced due to outdated scheduling information

Engineering Contradiction:

Improvenetwork protocol compatibilityVSAvoidresource efficiency

Core Design Contradiction:

Adaptability or versatilityVSProductivity

Solution Approach 1:

The patent improves resource efficiency by implementing preliminary action through early buffer status indication via scheduling request. This allows the network to allocate resources based on current buffer status rather than outdated information, optimizing resource utilization while maintaining compatibility with existing network protocols.

Inventive Principle:

Principle #10Preliminary action

3Device complexity

If traditional BSR reporting is used, then the system maintains simplicity in implementation, but communication delays increase due to outdated information requiring re-scheduling

Engineering Contradiction:

Improveimplementation simplicityVSAvoidcommunication delays

Core Design Contradiction:

Device complexityVSLoss of time

Solution Approach 1:

The patent reduces communication delays while maintaining implementation simplicity by having the UE indicate buffer status in advance through the scheduling request mechanism. This preliminary indication eliminates the need for multiple scheduling rounds and re-scheduling operations, thereby reducing overall communication delay without significantly increasing system complexity.

Inventive Principle:

Principle #10Preliminary action

Data Source

PatentUS12133224B2Network node, UE and methods performed therein for handling communication

Publication Date: 2024.10.29 TELEFONAKTIEBOLAGET LM ERICSSON (PUBL)

AI summary

Embodiments herein relate to, e.g., a method performed by a UE for handling communication of data in a wireless communication network. The UE transmits a scheduling request, SR, indicating a buffer status of the UE or along with an indication indicating the buffer status of the UE.