Sequence Generation for Bandwidth Adaptability
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Solution Overview
Problem
In LTE systems, generating sequences according to maximum system bandwidth results in low efficiency, high energy consumption, and wastage of computing resources, especially when the maximum system bandwidth exceeds 20 MHz.
Innovation Solution
A method for sequence generation in terminals and base stations that determines candidate sequences with lengths less than the maximum available system bandwidth, allowing for connection or direct use of these sequences as reference or scrambling code sequences, reducing computational complexity and energy consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If sequences are generated according to maximum system bandwidth, then sequence coverage for all bandwidths is ensured, but sequence generation complexity and energy consumption increase significantly
Solution Approach 1:
The patent divides the maximum bandwidth sequence into multiple sub-sequences, each corresponding to a specific bandwidth. Instead of generating one long sequence for maximum bandwidth and clipping it, the system generates multiple shorter sequences segmented by bandwidth, reducing the computational burden of sequence generation while maintaining adaptability to different bandwidth requirements
Solution Approach 2:
The patent implements dynamic sequence generation where the sequence length and parameters are adjusted according to the actual bandwidth requirement. The base station and terminal can dynamically select appropriate sequence parameters (such as sequence length, root index) based on the configured bandwidth, avoiding the need to always generate sequences for maximum bandwidth
2Adaptability or versatility
If sequences are generated according to maximum system bandwidth, then all bandwidth scenarios are covered, but computing resources are wasted when actual bandwidth is lower
Solution Approach 1:
The patent applies partial action by generating only the necessary portion of the sequence required for the actual bandwidth. Instead of generating the full maximum bandwidth sequence and discarding unused portions through clipping, the system generates exactly the number of sequence elements needed for the current bandwidth configuration, eliminating wasted computational resources
Solution Approach 2:
The patent changes key parameters of the sequence generation process based on actual bandwidth requirements. Parameters such as sequence length, root index, and initialization values are dynamically adjusted according to the configured bandwidth, allowing the system to optimize computing resources by generating sequences with appropriate parameters rather than always using maximum bandwidth parameters
3Manufacturing precision
If maximum bandwidth sequences are generated and clipped, then sequence accuracy is maintained, but sequence generation efficiency decreases
Solution Approach 1:
The patent performs preliminary actions by pre-calculating and storing sequence parameters (such as root indices, length values) for different bandwidth configurations. When a specific bandwidth is configured, the system can directly retrieve and use the pre-prepared parameters, avoiding the need to generate sequences from scratch and eliminating the clipping step, thus maintaining accuracy while improving efficiency
Data Source
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AI summary
The present invention discloses a sequence generation method and a base station. The method includes: determining, by a terminal, at least one first sequence according to at least one candidate sequence, where a length of the candidate sequence is less than a sequence length corresponding to a maximum available system bandwidth; and connecting, by the terminal, the at least one first sequence to generate a second sequence or directly using the at least one first sequence as a second sequence, and receiving a signal according to the second sequence, where the second sequence is at least one of a reference signal sequence or a scrambling code sequence. According to the foregoing manner in the present invention, a sequence to be actually used, that is, a second sequence can be effectively obtained according to an access bandwidth of a terminal and/or a bandwidth in which a network provides a service for a terminal. Therefore, sequence generation is more efficient and is less complex, and causes less energy consumption. Moreover, massive computation required when a sequence is generated according to a maximum system bandwidth in the prior art can be avoided, which can reduce computing resources.