Uplink Resource Scheduling for Variable Periodic Traffic

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Solution Overview

Problem

In packet-based mobile communication systems, existing resource request and scheduling methods fail to efficiently allocate resources for variable size packets with periodic time intervals, leading to delays and inefficiencies in uplink traffic transmission, which can result in discarded data and suboptimal resource utilization.

Innovation Solution

A resource allocation request method and packet scheduling method that involve checking mode selection conditions, generating and transmitting scheduling information indicating the state of the transmit buffer, and periodically allocating resources based on updated scheduling information to ensure efficient resource allocation for variable size packets with periodic time intervals.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Measurement precision

If the UE frequently reports transmit buffer state information to improve uplink scheduling performance, then scheduling accuracy is improved, but resource consumption increases

Engineering Contradiction:
Improvescheduling accuracyVSAvoidresource consumption
Core Design Contradiction:
Measurement precisionVSLoss of energy

Solution Approach 1:

The patent changes the parameter of reporting frequency based on buffer state conditions. The UE adjusts whether to report buffer state information dynamically - reporting only when necessary (e.g., when buffer state changes significantly or reaches thresholds) rather than reporting at fixed intervals. This parameter adaptation resolves the contradiction by achieving sufficient scheduling accuracy while minimizing unnecessary resource consumption.

Inventive Principle:
Principle #35Parameter changes

Solution Approach 2:

The patent applies partial action by reporting buffer state information selectively rather than continuously. The UE performs partial reporting - only transmitting buffer state information when it becomes necessary for scheduling decisions, rather than excessive continuous reporting. This approach maintains scheduling accuracy where needed while reducing overall resource consumption.

Inventive Principle:
Principle #16Partial or excessive action

2Loss of energy

If the UE delays resource request reporting to reduce reporting overhead, then resource consumption decreases, but timeliness of scheduling information is worsened

Engineering Contradiction:
Improveresource consumptionVSAvoidtimeliness of scheduling information
Core Design Contradiction:
Loss of energyVSLoss of time

Solution Approach 1:

The patent dynamically changes the reporting timing parameter based on buffer state conditions. Instead of fixed periodic reporting or continuous reporting, the UE adjusts reporting timing according to actual buffer state changes and scheduling needs. This parameter adaptation ensures timely information delivery when necessary while minimizing reporting overhead during stable periods.

Inventive Principle:
Principle #35Parameter changes

Solution Approach 2:

The patent prepares scheduling information in advance by monitoring buffer state continuously, but only transmits when triggering conditions are met. The UE performs preliminary buffering of scheduling information and triggers transmission proactively when conditions warrant reporting, rather than waiting for scheduled reporting intervals. This resolves the contradiction by ensuring timeliness when needed while reducing overall reporting frequency.

Inventive Principle:
Principle #10Preliminary action

3Measurement precision

If the UE reports detailed buffer state information to improve scheduling accuracy, then scheduling performance is improved, but information overhead increases

Engineering Contradiction:
Improvescheduling accuracyVSAvoidinformation overhead
Core Design Contradiction:
Measurement precisionVSLoss of information

Solution Approach 1:

The patent applies local quality by reporting only the specific buffer state information that is locally relevant to scheduling decisions. Instead of reporting all possible buffer parameters uniformly, the UE selectively reports only the necessary portions of buffer state information based on current scheduling needs and traffic characteristics. This resolves the contradiction by providing sufficient scheduling accuracy with minimized information overhead.

Inventive Principle:
Principle #3Local quality

Solution Approach 2:

The patent extracts only the essential buffer state information needed for scheduling decisions rather than reporting complete buffer state details. The UE identifies and extracts the critical scheduling-relevant parameters from the full buffer state, transmitting only those extracted elements. This approach maintains scheduling accuracy while significantly reducing information overhead.

Inventive Principle:
Principle #2Taking out (Extraction)

Data Source

PatentUS8098622B2Method for requesting resource and scheduling for uplink traffic in mobile communication and apparatus thereof
Publication Date: 2012.01.17 ELECTRONICS & TELECOMM RES INST
  • US8098622B2 patent drawing
  • US8098622B2 patent drawing
  • US8098622B2 patent drawing

AI summary

The present invention relates to a resource allocation requesting method and a packet scheduling method for uplink packet traffic in a mobile communication system, and an apparatus of the packet scheduling method. For efficient scheduling for the uplink traffic, scheduling is performed according to characteristics of traffic between a base station and user equipment (UE). Particularly, when the traffic generates a variable size packet on a periodic basis, the traffic is classified into first traffic that generates a completely variable size packet on a periodic basis and second traffic that generates a quasi-variable size packet on a periodic basis. In addition, the UE requests resource allocation in a different form from the base station depending on the type of traffic, and the base station performs scheduling according to the resource allocation request. Therefore, the UE requests resource allocation in accordance with traffic characteristics and the base station performs scheduling according to the traffic characteristics so that optimal uplink scheduling can be performed.