PTRS Port Mapping for Multi-Codeword Uplink Throughput
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Solution Overview
Problem
Existing wireless communication technologies face challenges in efficiently utilizing multiple antenna port groups for uplink communication, particularly in determining associations between phase tracking reference signal (PTRS) ports and codewords, which affects uplink throughput.
Innovation Solution
A method and apparatus for determining associations between multiple PTRS ports and codewords for uplink communication using multiple antenna port groups, involving the transmission of DCI that identifies transmission parameters to facilitate this association.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If multiple antenna port groups are used for uplink communication, then uplink throughput is improved, but the complexity of determining associations between PTRS ports and codewords increases
Solution Approach 1:
The patent segments the association determination process by introducing separate indication fields in DCI format 01: a first indication field for mapping PTRS ports to codewords and a second indication field for mapping PTRS ports to antenna port groups. This segmentation allows independent configuration of each mapping relationship, reducing the complexity of determining associations while enabling multiple antenna port groups to be used for uplink communication, thereby improving uplink throughput
Solution Approach 2:
The patent enables dynamic configuration of PTRS port associations through DCI signaling. The base station can dynamically indicate different mapping relationships between PTRS ports and codewords/antenna port groups based on current channel conditions and traffic requirements. This dynamic approach allows the system to adapt to changing conditions while maintaining clear association rules, thus improving throughput without permanently increasing complexity
2Productivity
If multiple codewords are used for uplink transmission, then data transmission efficiency is improved, but the difficulty of determining PTRS port associations increases
Solution Approach 1:
The patent performs preliminary action by pre-defining the structure of indication fields in DCI format 01. The first indication field is specifically designed to indicate the mapping relationship between PTRS ports and codewords, while the second indication field indicates the mapping between PTRS ports and antenna port groups. These pre-structured fields are included in the DCI message before transmission, allowing the UE to easily determine associations without complex processing, thus improving data transmission efficiency while reducing determination difficulty
Solution Approach 2:
The patent introduces DCI indication fields as intermediaries between the base station's scheduling decisions and the UE's transmission configuration. These indication fields serve as a standardized interface that carries association information from the base station to the UE in a structured and easily interpretable format, simplifying the determination process while enabling efficient multi-codeword transmission
Data Source
AI summary
Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment may determine an association between multiple phase tracking reference signal (PTRS) ports and multiple codewords that are to be used for an uplink communication that uses multiple antenna port groups, and transmit the uplink communication using the multiple codewords based at least in part on the association. Numerous other aspects are provided.