Base Station Random Access Preamble Allocation
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Solution Overview
Problem
In communication systems, User Equipment (UE) often face delays in random access due to limited unique preambles, leading to competition for access when multiple UE send identical preambles to the base station.
Innovation Solution
The method involves broadcasting paging information with a preset first preamble that uniquely identifies the target UE, allowing only that UE to send the preset preamble for random access, while other UE use different preambles, ensuring the base station receives only one preset preamble and can respond quickly and accurately.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple UE send identical preambles to the base station due to limited unique preambles, then the base station can identify UE for random access, but the UE have to compete for access causing delay
Solution Approach 1:
The patent segments the random access process by dividing UE into different groups based on their access requirements. Different preamble sets are allocated to different groups, allowing simultaneous non-conflicting access. This segmentation eliminates competition between UE while maintaining reliable identification for each group.
Solution Approach 2:
The base station performs preliminary action by pre-allocating different preamble resources to different UE groups before the random access occurs. This advance resource allocation ensures that when UE need to access, they already have dedicated preambles assigned, avoiding on-the-spot competition and reducing access delay.
2Device complexity
If the base station uses a limited number of preambles for random access, then the system complexity is reduced, but multiple UE must compete for the same preambles
Solution Approach 1:
The patent introduces a new dimension to preamble resources by creating multiple preamble sets (different groups) instead of simply increasing the number of preambles within a single set. This dimensional expansion allows the system to accommodate more UE simultaneously without increasing the complexity of managing a single large preamble pool, thereby improving access efficiency while maintaining manageable complexity.
Data Source
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AI summary
The present disclosure relates to a random access method suitable for a base station. The method comprises: broadcasting paging information, wherein the paging information includes identification information about a target user equipment and a pre-set first preamble; receiving a preamble sent by the target user equipment; and if the received preamble is the pre-set first preamble, establishing a communication connection with the target user equipment. According to the embodiments of the present disclosure, it can be ensured that once a base station broadcasts paging information carrying a first pre-set preamble, there is only one pre-set first preamble in a received preamble, without carrying out contention resolution on a target user equipment that sends the first pre-set preamble, so that the base station can quickly and accurately feed back a random access response to the target user equipment according to the pre-set first preamble, and the target user equipment then quickly establishes a communication connection with the base station, thereby avoiding a delay in the random access process.