NB-IoT Scheduling Request Resource Configuration

Solution Overview

Problem

In Narrowband Internet of Things (NB-IoT) systems, the process of initiating random access for uplink data transmission is complex and results in increased delay and power consumption due to the need for terminal devices to repeatedly re-initiate random access to obtain uplink shared channel resources.

Innovation Solution

A method where terminal devices obtain resource configuration information to determine the resource for sending scheduling requests, allowing them to send requests based on pre-established correspondences between sequences and uplink data amounts, reducing the need for buffer status reports and simplifying the process by using a single-carrier frequency-hopping manner for scheduling requests.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Productivity

If terminal devices re-initiate random access to obtain uplink shared channel resources, then uplink data transmission can be achieved, but the process becomes complex and delay and power consumption increase

Engineering Contradiction:

Improveuplink data transmission capabilityVSAvoidrandom access process complexity

Core Design Contradiction:

ProductivityVSDevice complexity

Solution Approach 1:

The base station pre-configures scheduling request resources and corresponding sequences for the terminal device before uplink data transmission is needed. The terminal device stores these pre-configured resources and can directly use them when uplink data arrives, eliminating the need for random access re-initiation and reducing process complexity

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The patent introduces scheduling request resources as an intermediary mechanism between the terminal device and uplink shared channel resources. Instead of directly accessing UL-SCH resources through random access, the terminal device uses scheduling request resources to notify the base station, which then allocates appropriate uplink resources, simplifying the overall transmission process

Inventive Principle:

Principle #24Intermediary (Mediator)

2Productivity

If terminal devices re-initiate random access to obtain uplink shared channel resources, then uplink data transmission can be achieved, but delay and power consumption increase

Engineering Contradiction:

Improveuplink data transmission capabilityVSAvoidtransmission delay

Core Design Contradiction:

ProductivityVSLoss of time

Solution Approach 1:

The base station pre-configures scheduling request resources and corresponding sequences for the terminal device before uplink data transmission is needed. The terminal device stores these pre-configured resources and can directly use them when uplink data arrives, eliminating the need for random access re-initiation and reducing process complexity

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The terminal device maintains a continuous listening state for downlink control information that schedules uplink resources. When uplink data needs to be transmitted, the device can quickly switch to using the pre-configured scheduling request resources, ensuring continuous and efficient data transmission without interruption from random access procedures

Inventive Principle:

Principle #20Continuity of useful action

3Productivity

If terminal devices re-initiate random access to obtain uplink shared channel resources, then uplink data transmission can be achieved, but power consumption increases

Engineering Contradiction:

Improveuplink data transmission capabilityVSAvoidterminal device power consumption

Core Design Contradiction:

ProductivityVSUse of energy by moving object

Solution Approach 1:

The base station pre-configures scheduling request resources and corresponding sequences for the terminal device before uplink data transmission is needed. The terminal device stores these pre-configured resources and can directly use them when uplink data arrives, eliminating the need for random access re-initiation and reducing process complexity

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The terminal device maintains a continuous listening state for downlink control information that schedules uplink resources. When uplink data needs to be transmitted, the device can quickly switch to using the pre-configured scheduling request resources, ensuring continuous and efficient data transmission without interruption from random access procedures

Inventive Principle:

Principle #20Continuity of useful action

Data Source

PatentEP3651514B1Information transmission method and device

Publication Date: 2021.06.02 HUAWEI TECH CO LTD

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AI summary

This application provides an information transmission method and a device. The method includes: obtaining, by a terminal device, resource configuration information, where the resource configuration information is used to indicate a resource used by the terminal device to send a scheduling request; sending, by the terminal device, the scheduling request to a network device on the resource indicated by the resource configuration information, where a preset correspondence exists between a sequence carried in the scheduling request and an amount of uplink data that is requested to be sent by the terminal device to the network device. An implementation process is simple, and a delay and power consumption are greatly reduced.