Idle-Mode Preconfigured Uplink Resources for Small-Data Transmission
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Solution Overview
Problem
Existing wireless communication technologies face challenges in efficiently managing resource allocation for small data transmissions, leading to increased energy consumption and latency, particularly in scenarios like NarrowBand-Internet of Things (NB-IoT) where terminals spend significant power during PRACH procedures.
Innovation Solution
The implementation of pre-configured uplink resources (PUR) in idle mode, allowing terminals to perform data transmissions using dedicated resources without entering a full RRC connected state, thereby reducing the need for PRACH processes and optimizing energy efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If terminals enter RRC connected state for data transmission, then transmission reliability is improved, but energy consumption increases and latency increases
Solution Approach 1:
The patent segments the RRC connection state into two parts: a lightweight idle state and a full connected state. Pre-configured resources are provided in the idle state, allowing terminals to transmit small data packets without entering the full connected state, thus reducing energy consumption while maintaining transmission reliability for small data transmissions.
Solution Approach 2:
The network pre-configures uplink resources for terminals in idle mode before actual data transmission occurs. This preliminary resource allocation eliminates the need for terminals to perform time-consuming PRACH procedures and enter full RRC connected state, thereby reducing energy consumption and latency while ensuring reliable transmission when needed.
2Reliability
If terminals perform PRACH procedures for data transmission, then transmission reliability is ensured, but energy consumption increases and latency increases
Solution Approach 1:
The network pre-configures uplink resources and timing information for terminals in idle mode. When data needs to be transmitted, terminals can directly use these pre-configured resources without performing the time-consuming PRACH procedure, significantly reducing latency while maintaining transmission reliability through dedicated resource allocation.
Solution Approach 2:
The patent introduces pre-configured resources as an intermediary mechanism between idle mode and full connected state. These resources act as a bridge that allows terminals to transmit data reliably without completing the entire PRACH procedure and RRC connection establishment, thereby reducing latency.
3Use of energy by moving object
If pre-configured transmission resources are provided in idle mode, then energy consumption is reduced and latency is reduced, but resource management complexity increases
Solution Approach 1:
The patent provides pre-configured resources partially - only for idle mode terminals that need small data transmissions. The resources are configured with specific parameters (time, frequency, power) that are sufficient for small data packets but not for full connected state operations. This partial provision reduces energy consumption and complexity compared to full RRC connection management.
Solution Approach 2:
The patent changes key parameters of resource configuration when providing pre-configured resources in idle mode: reduced time resources, reduced frequency resources, and power control parameters are adjusted to match the needs of small data transmissions in idle state, thereby reducing management complexity while maintaining effectiveness.
4Productivity
If dedicated resources are allocated for idle mode terminals, then spectral efficiency is improved, but device complexity increases
Solution Approach 1:
The patent segments resource allocation into two categories: pre-configured resources for idle mode terminals and scheduled resources for connected mode terminals. This segmentation allows dedicated resources to be allocated efficiently to idle terminals without requiring complex dynamic scheduling, thereby improving spectral efficiency while managing device complexity through simplified resource management procedures.
Data Source
AI summary
Methods, systems, and devices related to related to digital wireless communication, and more specifically, to techniques related to pre-configure dedicated resources for data transmission. In one exemplary aspect, a method for wireless communication includes receiving a pre-configured transmission resource request from a terminal. The method also includes configuring a pre-configured transmission resource based on the pre-configured transmission resource request. In another exemplary embodiment, a method for wireless communication includes receiving a pre-configured transmission resource request from a terminal, wherein the pre-configured transmission resource request includes a medium access control (MAC) control element. The method also includes configuring a pre-configured transmission resource based on the pre-configured transmission resource request.