Base Station Sub-Block Sequence Mapping for Wireless Access
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Solution Overview
Problem
In conventional wireless communication systems, random sequence selection by mobile devices can lead to message collisions and system errors when multiple devices use the same sub-block, and including identifiers in access messages reduces usable space, causing inefficiencies and errors in bandwidth allocation.
Innovation Solution
A base station assigns unique identifiers to each sub-block and sequence, creating a mapping table to manage these assignments and transmit them to mobile stations, allowing for individual communication and eliminating the need for additional identifying information in messages.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If mobile apparatuses randomly choose sequences and sub-blocks for bandwidth requests, then the system allows flexible access, but message collisions occur when multiple apparatuses choose the same resources
Solution Approach 1:
The base station pre-assigns specific sequences to specific mobile apparatuses before bandwidth request transmission. This preliminary assignment eliminates random selection and ensures that each apparatus uses a unique sequence, preventing collisions at the source while maintaining flexible access through the pre-configured mapping.
Solution Approach 2:
The patent introduces an intermediary mapping mechanism where the base station maintains a mapping table that associates each mobile apparatus with a specific sequence and sub-block combination. This intermediary layer coordinates resource allocation, ensuring unique assignments without requiring direct communication between mobile apparatuses, thus preventing collisions while preserving system flexibility.
2Measurement precision
If identifiers are included in access messages to identify different mobile apparatuses, then the base station can recognize different devices, but the usable space of the access message is reduced
Solution Approach 1:
The patent extracts the identification function from the access message content itself and places it in the sequence selection mechanism. Since each mobile apparatus is assigned a unique sequence, the sequence index implicitly identifies the apparatus without requiring explicit identifier fields in the access message, thereby preserving maximum usable message space while maintaining precise device identification.
Solution Approach 2:
The assigned sequences serve multiple functions simultaneously: they act as both the spreading code for signal separation and as the implicit identifier for mobile apparatus recognition. This multi-functionality eliminates the need for separate identifier fields in access messages, maximizing the usable message space while ensuring accurate device identification through the sequence-sub-block mapping.
Data Source
AI summary
A base station, a mobile station and a communication method thereof are provided. The base station and the mobile station are adapted for use in a wireless network. The wireless network comprises the base station and the mobile station. The mobile station connects with the base station via a physical channel. The physical channel comprises a plurality of resource units. Each resource unit comprises a sub-block. The sub-block comprises a sequence. The mobile station communicates with the base station with the sequence during the sub-block bases on a mapping relation.