Preconfigured Uplink Access for Low-Latency IoT Transmission
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Solution Overview
Problem
Existing wireless communication systems face challenges in reducing power consumption and latency for low data, sporadic transmissions by IoT devices, particularly in deep coverage scenarios, due to repeated random access procedures.
Innovation Solution
Implementing preconfigured uplink resources that allow IoT devices to skip the initial stages of the random access procedure, using fixed and shared resources for uplink transmissions, reducing the need for repeated preamble transmissions and enabling efficient data transmission without full connection establishment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If random access procedure is used for each uplink transmission, then connection reliability is improved, but power consumption increases and latency increases
Solution Approach 1:
The network node preconfigures uplink resources and transmits configuration information to the terminal before the terminal needs to transmit data. This allows the terminal to skip the random access procedure and directly use the preallocated resources, reducing power consumption while maintaining connection reliability through pre-established resource allocation
Solution Approach 2:
The patent extracts the resource allocation and configuration functions from the traditional random access procedure. By separating the resource configuration step (done in advance) from the data transmission step, the terminal can avoid repeated random access procedures and their associated power consumption while maintaining reliable connections
2Reliability
If random access procedure is used for each uplink transmission, then connection reliability is improved, but latency increases
Solution Approach 1:
The network node performs resource configuration and allocation in advance before the terminal needs to transmit data. This preliminary action eliminates the need for time-consuming random access procedures at the moment of data transmission, thereby reducing latency while maintaining connection reliability through pre-established resource allocation
Solution Approach 2:
The terminal skips the traditional random access procedure (preamble transmission, random access response, contention resolution) by using preconfigured uplink resources. This skipping mechanism directly reduces the time required for uplink transmission while maintaining reliable connections through the pre-configured resource allocation
3Reliability
If repeated preamble transmissions are used for deep coverage, then signal reliability is improved, but power consumption increases
Solution Approach 1:
The network node preconfigures uplink resources with appropriate transmission parameters (power, timing, frequency) before the terminal needs to transmit data. This preliminary configuration ensures that the terminal uses optimal transmission parameters from the start, achieving reliable signal transmission for deep coverage scenarios without needing repeated preamble transmissions and their associated power consumption
Data Source
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AI summary
A method of communicating between a terminal and a wireless network node comprising, at the terminal: checking validity of a timing advance; and if the timing advance is valid, causing sending of an uplink connection request within a preconfigured uplink resource.