Base Station Demodulation Pilot Pattern Segmentation for Decoding Delay
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Solution Overview
Problem
In communication processes, the simultaneous transmission of multiple codewords by a base station results in significant decoding delays due to the shared time-frequency resources used by their demodulation reference signals (DMRS), which hinders the efficient decoding of subsequent codewords.
Innovation Solution
The base station employs a data processing method where it obtains and maps demodulation pilot patterns for each codeword, ensuring that the first codeword is transmitted before the second codeword, with a higher modulation and coding scheme (MCS) indication value for the first codeword, allowing for earlier decoding and improved decoding success rates.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If DMRS ports of multiple codewords occupy the same time-frequency resource, then resource overhead is reduced, but decoding delay increases
Solution Approach 1:
The patent segments the time-frequency resources for DMRS ports by dividing them into different resource sets (first resource set and second resource set). Codewords are assigned to different resource sets, allowing parallel decoding without requiring all DMRS ports to occupy the same resources. This resolves the contradiction by enabling resource efficiency while reducing decoding delay through segmented resource allocation.
Solution Approach 2:
The patent introduces a new dimension for resource allocation by creating multiple resource sets that can be configured with different time-frequency characteristics. This dimensional expansion allows the system to allocate DMRS resources in a more flexible manner, reducing decoding delay while maintaining resource efficiency through multi-dimensional resource management.
2Productivity
If DMRS ports of multiple codewords occupy the same time-frequency resource, then resource utilization is improved, but decoding accuracy deteriorates
Solution Approach 1:
By segmenting DMRS resources into different resource sets and assigning codewords to different segments, the patent reduces interference between codewords while maintaining high resource utilization. Each segment provides dedicated resources for its assigned codeword, improving decoding accuracy without sacrificing overall resource efficiency.
Solution Approach 2:
The patent applies local quality by configuring different resource sets with different local characteristics (time-frequency positions, densities). Each codeword receives DMRS resources optimized for its specific requirements within its assigned resource set, improving decoding accuracy while maintaining high overall resource utilization through localized optimization.
3Quantity of substance
If sequential decoding of multiple codewords is performed, then resource overhead is reduced, but time consumption increases
Solution Approach 1:
The patent segments the decoding process by assigning different codewords to different resource sets that can be decoded in parallel. This segmentation enables simultaneous processing of multiple codewords, reducing total time consumption while maintaining resource efficiency through the segmented resource allocation structure.
Solution Approach 2:
The patent prepares DMRS resources in advance by configuring multiple resource sets with different time-frequency characteristics before transmission. This preliminary action allows the receiving device to have ready-to-use resource configurations, enabling faster parallel decoding and reducing overall time consumption while maintaining resource efficiency.
Data Source
AI summary
Methods, base station, and receiving device are provided to advance a decoding time of a second codeword. The method performed by a base station includes obtaining a demodulation pilot pattern (DPP) in a transmission time unit, the DPP includes a first DPP of a first codeword and a second DPP of a second codeword; the first DPP indicates a time-frequency resource of each OFDM symbol in a first set, and the second DPP indicates a time-frequency resource of each OFDM symbol in a second set; and an MCS indication value of the first codeword is greater than an MCS indication value of the second codeword; and mapping a pilot signal to a time-frequency resource based on the DPP, and sending the pilot signal, a transmission time of a first OFDM symbol in the first set is before a transmission time of a first OFDM symbol in the second set.