Resource Element Mapping for CoMP Data Transmission
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Solution Overview
Problem
In cooperative multi-point transmission systems, resource elements traditionally used for reference signals are underutilized, leading to overhead and reduced performance, especially in CoMP Joint Transmission and Joint Processing scenarios.
Innovation Solution
The system maps data symbols onto resource elements used by other cells within the same time-frequency resource, allowing these elements to carry data symbols with different precoding matrices or vectors, reducing overhead and improving system performance by dynamically signaling resource element utilization to user equipment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If resource elements are traditionally used for reference signals in CoMP Joint Transmission and Joint Processing scenarios, then reference signal transmission is ensured, but resource element utilization is low and overhead increases
Solution Approach 1:
The patent applies multi-functionality by enabling resource elements to serve dual purposes: transmitting reference signals for channel estimation and carrying data symbols for information transmission. This allows the same time-frequency resources to fulfill multiple functions simultaneously, resolving the contradiction between ensuring reference signal reliability and improving resource utilization efficiency
Solution Approach 2:
The patent merges the function of reference signal transmission with data transmission by allowing data symbols to be mapped onto resource elements that traditionally carry only reference signals. This combination eliminates wasted resources and increases overall system throughput without compromising reference signal functionality
2Measurement precision
If resource elements are used for reference signals in multiple cells, then channel estimation is maintained, but data transmission capacity is reduced
Solution Approach 1:
The patent enables resource elements to perform multiple functions by allowing them to carry both reference signals for channel estimation and data symbols for information transmission. This multi-functional usage maintains measurement precision while increasing data transmission capacity
Solution Approach 2:
The patent changes the parameter of resource element utilization by dynamically configuring whether resource elements carry reference signals or data symbols based on scheduling decisions. This flexibility allows the system to optimize between channel estimation accuracy and data transmission capacity according to current network conditions
3Productivity
If resource elements are dynamically allocated for data transmission in CoMP scenarios, then resource utilization improves, but scheduling complexity increases
Solution Approach 1:
The patent implements dynamic resource element allocation where the function of resource elements (reference signal or data transmission) can change based on scheduling decisions. This dynamic approach improves resource utilization efficiency while the complexity is managed through coordinated multi-point scheduling mechanisms
Data Source
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AI summary
A system and method for mapping data symbols are provided. A method for communications device operations includes transmitting resource element utilization information to a communications device, and mapping symbols intended for the communications device to the plurality of resource elements. The resource element utilization information includes utilization information for a subset of resource elements out of a plurality of resource elements, the subset of resource elements corresponds to other resource elements of at least one other cell within a cooperating set, and the other resource elements are carrying specified signals. The mapping is based on the resource element utilization, and the mapping is performed by at least one cell within the cooperating set.