Sequence-Based PUCCH and PRACH Using Frequency-Distributed Resources
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Solution Overview
Problem
Existing wireless communication systems face challenges in efficiently transmitting sequence-based signals across frequency spectrums with varying PSD requirements, leading to performance losses due to narrowband transmissions.
Innovation Solution
The system employs frequency-distributed resource allocation, using frequency interlaces, combs, and mini-interlaces, along with UE-specific and sequence-specific resources, to optimize power utilization and channel coherency, enabling efficient multiplexing of sequence-based transmissions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If narrowband transmission is used for sequence-based signals, then sequence separation and detection performance are improved, but power utilization deteriorates due to performance loss under PSD requirements
Solution Approach 1:
The frequency band is segmented into multiple subbands, and sequence-based signals are transmitted across multiple subbands simultaneously using frequency-distributed resource allocation. This segmentation allows the signal to spread over a wider bandwidth while maintaining sequence separation through orthogonal frequency resources, thereby improving power utilization without sacrificing detection performance.
Solution Approach 2:
The patent transitions from narrowband transmission in the frequency domain to wideband frequency-distributed transmission by utilizing multiple subbands. This dimensional expansion in the frequency domain allows the system to achieve both sequence separation and improved power utilization by distributing the signal energy across multiple frequency resources.
2Use of energy by moving object
If frequency-distributed resource allocation is used, then power utilization is improved, but device complexity increases due to multiple resource allocation modes
Solution Approach 1:
The frequency-distributed resource allocation mechanism serves multiple functions: it enables power boosting for PSD compliance, provides sequence separation for detection performance, and supports multiplexing for multiple users. By making the resource allocation system multi-functional, the patent reduces the need for separate mechanisms for each function, thereby managing complexity while achieving improved power utilization.
Solution Approach 2:
The system dynamically adjusts transmission parameters including the number of active subbands, resource allocation patterns, and sequence mapping based on PSD requirements and channel conditions. This parameter adaptability allows the system to optimize power utilization while managing complexity through automated parameter selection rather than manual configuration of multiple allocation modes.
3Use of energy by moving object
If sequence-based signals are transmitted across multiple subbands, then power utilization and PSD compliance are improved, but channel coherency deteriorates
Solution Approach 1:
The patent applies different resource allocation strategies to different subbands based on their specific channel characteristics and coherence properties. By tailoring the frequency-distributed allocation to the local channel conditions of each subband, the system maintains channel coherency where needed while achieving power utilization benefits across the entire bandwidth.
Data Source
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AI summary
Wireless communications systems and methods related to communicating a sequence-based signal in a frequency spectrum are provided. A first wireless communication device obtains a configuration for communicating a sequence-based signal in the frequency spectrum. The configuration indicates resources in a frequency spectrum and a frequency distribution mode of the resources. The first wireless communication device communicates the sequence-based signal with a second wireless communication device in the frequency spectrum based on the configuration. The sequence-based signal includes at least one of a physical uplink control channel (PUCCH) signal or a physical random access channel (PRACH) signal. The frequency distribution mode indicates at least one of a frequency interlaced structure, a frequency comb structure, or a frequency mini-interlaced structure.