PRB Grouping for Modulation and Coding in Wireless Systems
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Solution Overview
Problem
In wireless communications systems, modulation and coding cannot be performed on data when the number of physical resource blocks (PRBs) exceeds 110, as no corresponding Transport Block Size (TBS) exists to support higher bandwidths.
Innovation Solution
The method involves grouping a large number of PRBs into smaller groups, each applicable to an existing modulation scheme, allowing modulation and coding to be performed using a TBS corresponding to each group, and transmitting data using a physical resource corresponding to the original number of PRBs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the number of physical resource blocks (PRBs) is increased to support larger carrier bandwidth, then the data transmission rate is improved, but no corresponding TBS exists for PRBs greater than 110, making modulation and coding impossible
Solution Approach 1:
The patent divides the large transport block (corresponding to N PRBs where N > 110) into multiple code blocks, where each code block is further segmented into segments that can be processed using existing TBS definitions. This segmentation allows the system to handle transport blocks larger than any single existing TBS by breaking them down into manageable pieces that fit within the existing TBS framework.
2Ease of operation
If existing modulation and coding schemes are used, then the system is simple to operate, but they cannot support carrier aggregation on bandwidth more than 20 MHz
Solution Approach 1:
The patent segments the large transport block into multiple code blocks and further divides each code block into segments that can be processed using existing TBS definitions. This allows the system to maintain simplicity by reusing existing modulation and coding schemes while extending support to larger carrier bandwidths through the segmentation approach.
Solution Approach 2:
The patent employs a nested structure where transport blocks are contained within larger transport blocks, and code blocks are nested within transport blocks. This nested organization allows the system to build upon existing TBS definitions to support larger bandwidths without requiring completely new modulation and coding schemes.
3Area of stationary object
If a new TBS is created to support more than 110 PRBs, then the bandwidth support is improved, but the complexity of the modulation and coding scheme increases
Solution Approach 1:
Instead of creating a single complex TBS for large bandwidths, the patent segments the transport block into multiple code blocks and segments, allowing each to use simpler existing TBS definitions. This avoids the need for a single complex TBS while still supporting large carrier bandwidths.
Solution Approach 2:
The patent makes existing TBS definitions multi-functional by allowing them to be applied to multiple segments and code blocks. This universal approach allows the same TBS definitions to serve multiple purposes in handling large transport blocks, reducing the need for new specialized TBS definitions.
Data Source
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AI summary
A data transmission method, a device, and a system are disclosed and relate to the communications field, to resolve a problem that modulation and coding cannot be performed on data because no corresponding transport block size TBS exists when a quantity of physical resource blocks PRBs of a wireless communications system is greater than 110. A specific solution is: obtaining, by a first device, grouping information, where the grouping information is used to indicate information of grouping N PRBs into M PRB groups; performing modulation and coding by using a TBS that corresponds to each of the M PRB groups, to generate modulation symbols; and transmitting data to a second device by using a physical resource that corresponds to the N PRBs. The foregoing solution is used for data transmission in a wireless network.