Random Access Preamble and Tag Sequence Generation for IoT Collision Reduction
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Solution Overview
Problem
In a hyper-connected society with increasing IoT devices, the existing random access procedures in wireless communication face challenges such as wireless access collisions and insufficient wireless resources, particularly when devices transmit small amounts of data, leading to significant control and signaling overhead.
Innovation Solution
A new random access procedure is introduced, where terminals generate and transmit preamble and tag sequences using Zadoff-Chu sequences, allowing the base station to calculate correlation values and determine root indices, thereby reducing the likelihood of preamble collisions and optimizing resource allocation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a conventional random access procedure is performed for each data transmission, then wireless access can be established, but control and signaling overhead becomes great when devices transmit small amounts of data
Solution Approach 1:
The patent combines the random access procedure with data transmission by allowing devices to transmit data along with the preamble sequence in the same uplink resource. This merging eliminates the need for separate random access and data transmission phases, significantly reducing control signaling overhead for small data transmissions while maintaining wireless access establishment capability
2Adaptability or versatility
If multiple devices perform random access simultaneously, then wireless access capability is maintained, but wireless access collisions increase in high-density IoT environments
Solution Approach 1:
The patent segments the traditional random access procedure by allowing data transmission to be embedded within the preamble transmission phase. This segmentation enables the system to handle different data sizes appropriately - small data can be transmitted with the preamble without requiring full random access procedure, while large data follows conventional procedures, thereby reducing collision probability in high-density environments
Solution Approach 2:
The patent introduces an additional dimension to the random access procedure by enabling data transmission in the uplink resource simultaneously with preamble transmission. This dimensional addition allows the system to convey both access request and data information in the same time-frequency resource, reducing the burden on random access resources and minimizing collisions
Data Source
AI summary
Provided is a terminal, for example, user equipment (UE), including a processor and that performs a random access (RA) procedure with a base station, for example, for example, eNodeB, E-UTRAN Node B, or also known as Evolved Node B, and is at least temporarily embodied by the processor. The terminal may be at least temporarily embodied by the processor. The terminal may include a generator configured to generate a preamble sequence using a first sequence corresponding to a first root index based on a preamble index that is randomly selected, and a determiner configured to determine a second root index using the preamble index as an input value of a root index function. Further, the generator may be configured to generate a tag sequence using a second sequence corresponding to the second root index based on a tag index that is randomly selected.