Multi-Carrier PTRS Phase Tracking With Reduced Signaling Overhead
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In wireless communication systems, particularly in 5G NR, the allocation of phase tracking reference signals (PTRS) on multiple component carriers can be inefficient, leading to increased signaling overhead and reduced throughput due to negligible phase variation between carriers.
Innovation Solution
A configuration is implemented to process a reduced number of PTRSs over multiple configured component carriers, leveraging one PTRS for phase compensation across multiple carriers, especially for adjacent carriers with negligible phase variation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If phase tracking reference signals (PTRSs) are allocated on multiple component carriers, then phase compensation can be performed for each carrier, but signaling overhead increases and throughput decreases due to redundant signaling for adjacent carriers with negligible phase variation
Solution Approach 1:
The patent merges the phase tracking function across multiple component carriers by allocating PTRS only on a subset of carriers (e.g., one primary carrier) and reusing the phase compensation information for other carriers. This combining approach reduces redundant PTRS allocations while maintaining adequate phase compensation for all carriers, directly addressing the contradiction between reliability and signaling overhead.
Solution Approach 2:
The patent makes a single PTRS allocation serve multiple functions by using it for phase compensation across multiple component carriers simultaneously. The phase tracking reference signal allocated on one carrier performs the universal function of phase compensation for the entire carrier group, eliminating the need for separate PTRS allocations on each carrier and reducing overall signaling overhead.
2Reliability
If phase tracking reference signals (PTRSs) are allocated on multiple component carriers, then phase compensation can be performed for each carrier, but throughput is reduced due to increased signaling overhead
Solution Approach 1:
The patent merges the phase tracking function across multiple component carriers by allocating PTRS only on a subset of carriers (e.g., one primary carrier) and reusing the phase compensation information for other carriers. This combining approach reduces redundant PTRS allocations while maintaining adequate phase compensation for all carriers, directly addressing the contradiction between reliability and signaling overhead.
Solution Approach 2:
The patent applies partial action by allocating PTRS on only some carriers rather than all carriers. This partial allocation is sufficient to achieve the required phase compensation accuracy for the entire carrier group, avoiding the excessive action of allocating PTRS on every carrier and thereby preserving throughput while maintaining reliability.
3Reliability
If phase tracking reference signals (PTRSs) are allocated on all component carriers, then comprehensive phase compensation is achieved, but frequency resource utilization is inefficient due to negligible phase variation between adjacent carriers
Solution Approach 1:
The patent merges the phase tracking function across multiple component carriers by allocating PTRS only on a subset of carriers (e.g., one primary carrier) and reusing the phase compensation information for other carriers. This combining approach reduces redundant PTRS allocations while maintaining adequate phase compensation for all carriers, directly addressing the contradiction between reliability and signaling overhead.
Solution Approach 2:
The patent changes the allocation parameter of PTRS from 'one PTRS per carrier' to 'one PTRS for multiple carriers'. This parameter change in the allocation strategy reduces the total number of PTRS signals needed, freeing up frequency resources while maintaining adequate phase compensation coverage through the reused phase information.
Data Source
AI summary
This disclosure provides systems, methods and apparatus, including computer programs encoded on computer storage media, for performing phase compensation. In some aspects, a user equipment (UE) can receive, from a network node, a configuration indicating a reduced number of multiple configured component carrier (CCs) over which to process one or more phase tracking reference signals (PTRSs) for performing phase compensation for the multiple configured CCs, receiving, over the reduced number of multiple configured CCs, the one or more PTRSs, and performing, based on the one or more PTRSs, phase compensation for the multiple configured CCs. In other aspects, the network node can transmit the configuration and/or the one or more PTRSs.