MIMO CRC Reduction via Proxy Error Detection
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Solution Overview
Problem
In wireless communication networks, attaching Cyclic Redundancy Checks (CRCs) to transport blocks increases overhead and reduces resource utilization, as each CRC occupies bits that could be used for actual data, and existing methods do not effectively address the issue of reducing CRCs in geospatially proximate data beams exposed to similar transmission errors.
Innovation Solution
The technology reduces the number of CRCs attached to transmitted data by utilizing multiple-input and multiple-output (MIMO) communications, where a data beam with a CRC can act as a proxy to determine error conditions for other geospatially proximate data beams, thereby omitting CRC attachments for those beams and allocating more resources to carry actual data.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If CRC is attached to each transport block to ensure data integrity, then error detection capability is improved, but overhead increases and resource utilization decreases
Solution Approach 1:
The patent merges the error detection function across multiple geospatially proximate data beams by using a single CRC from one beam as a proxy for error detection in other beams. Instead of attaching separate CRCs to each transport block in each beam, the system combines the error detection capability across beams, allowing one CRC to serve multiple beams and thereby reducing overall overhead while maintaining reliability.
Solution Approach 2:
The patent makes the CRC attachment universal across geospatially proximate beams. A single CRC attachment in one beam serves multiple functions: it protects that specific beam and simultaneously acts as a proxy for error detection in other proximate beams. This multi-functionality reduces the total number of CRCs needed while maintaining comprehensive error detection coverage.
2Reliability
If CRC is attached to each data beam to detect transmission errors, then data integrity is improved, but the number of bits available for actual data decreases
Solution Approach 1:
The patent merges the error detection function across multiple geospatially proximate data beams by using a single CRC from one beam as a proxy for error detection in other beams. Instead of attaching separate CRCs to each transport block in each beam, the system combines the error detection capability across beams, allowing one CRC to serve multiple beams and thereby reducing overall overhead while maintaining reliability.
Solution Approach 2:
The patent uses the CRC from one data beam as a copy or proxy for error detection in other proximate beams. Rather than creating separate CRCs for each beam, the system copies the error detection function across beams by using the CRC output from one beam to infer error conditions in other beams experiencing similar transmission conditions, thereby conserving bits for actual data.
3Reliability
If multiple CRCs are attached to geospatially proximate data beams, then error detection coverage is improved, but overhead and complexity increase
Solution Approach 1:
The patent merges the error detection function across multiple geospatially proximate data beams by using a single CRC from one beam as a proxy for error detection in other beams. Instead of attaching separate CRCs to each transport block in each beam, the system combines the error detection capability across beams, allowing one CRC to serve multiple beams and thereby reducing overall overhead while maintaining reliability.
Data Source
AI summary
Techniques related to reduction of cyclic redundancy check (CRC) overhead in multiple-input-multiple-output (MIMO) transmissions are disclosed. In one example aspect, a method for wireless communication includes determining a transport block for a transmission of data bits, determining multiple layers corresponding to multiple antennas for performing the transmission, and determining a mapping between the transport block and the multiple layers for the transmission. The method also includes selectively omitting a CRC attachment in one or more portions of the transport block in response to a CRC being attached in one portion of the transport block and mapping the transport block to a physical channel for transmission.