Random Access Resource Pool Segmentation for IoT Signal Collision Reduction
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Solution Overview
Problem
Conventional random access methods in radio communication technologies face issues such as high delay, large system resource overhead, and preamble collisions, which degrade reliability, especially in scenarios with multiple concurrent users and small packet data transmission in massive Internet of Things (IoT) applications.
Innovation Solution
A data transmission method that optimizes the random access frame using symbol spreading technology across time-frequency resource regions, with bit sequences determining spreading sequences to minimize collisions and improve detection efficiency, involving a transmitter and receiver design that includes orthogonal division of time-frequency resource pools for efficient data transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional 4-step random access method is used, then reliability is improved, but delay and system resource overhead increase
Solution Approach 1:
The patent segments the random access process by introducing two distinct random access resource pools (first pool for conventional 4-step, second pool for optimized access) with different configurations. This allows users to select appropriate access methods based on their specific needs, reducing overall system delay while maintaining reliability for applications that require it
Solution Approach 2:
The patent implements dynamic random access resource allocation where the network can configure and switch between different random access resource pools based on traffic conditions, user requirements, and system load. This dynamic adaptation enables the system to optimize between reliability and delay in real-time
2Reliability
If conventional random access process is used, then coverage is improved, but preamble collision probability increases
Solution Approach 1:
The patent divides the random access preamble resources into separate pools with different preamble formats and configurations. By segmenting the resource space, the probability of collision is reduced as users can be directed to appropriate pools based on their channel conditions and traffic types, minimizing harmful collisions while maintaining coverage
Solution Approach 2:
The patent changes key parameters of the random access process including preamble format, cyclic prefix length, and resource allocation patterns across different pools. These parameter variations allow the system to adapt to different channel conditions and user requirements, reducing collision probability while preserving coverage for various scenarios
3Measurement precision
If symbol spreading technology is applied, then blind detection efficiency is improved, but processing complexity increases
Solution Approach 1:
The patent segments the signal processing by applying symbol spreading technology selectively to specific random access channels and resource pools rather than universally. This targeted application improves blind detection efficiency for critical transmissions while limiting processing complexity increases to only where beneficial
Solution Approach 2:
The patent introduces spreading sequences as an intermediary layer between the data and the transmission channel. These sequences act as mediators that enhance detectability without requiring complex processing at both ends, as the spreading and despreading operations follow standardized procedures that balance performance with implementation complexity
Data Source
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AI summary
Disclosed in the embodiments of the present invention is a data transmission method. The method comprises: a transmitter transmitting, on a first time frequency resource region, transmission signals that are generated from a bit sequence B using at least a symbol extension technology; the extension sequence used by the symbol extension technology being the Index1-th sequence of a sequence set containing K1 extension sequences, the Index1-th characterizing the first index value; the transmitter using part of the bits of the bit sequence B and a bit sequence B0 as a bit sequence B2, and transmitting, over the Index2-th sub-resource pool of a second time frequency resource region containing K2 sub-resource pools, transmission signals generated on the basis of the bit sequence B2; the Index2-th characterizing a second index value; the first index value Index1 and the second index value Index2 both being determined according to the bit sequence B0. Further disclosed in the embodiments of the present invention are a transmitter, a receiver and a storage medium.