Coordinated Multipoint Resource Element Pattern Derivation
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Solution Overview
Problem
In Multiple-Input Multiple-Output (MIMO) communication systems using Cooperative Multipoint (CoMP) transmission, existing methods struggle to efficiently identify and utilize available time-frequency Resource Elements (REs) for data reception across cells with different reference signal patterns, leading to limited data transmission opportunities.
Innovation Solution
A method and apparatus that receive signaling information from a group of cooperating cells to derive a third pattern of REs available for data reception, based on the patterns used by individual cells, allowing for the identification and use of REs not occupied by reference signals, thereby enabling efficient data reception in CoMP systems.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple cells use different reference signal patterns for CoMP transmission, then transmission flexibility and adaptability are improved, but the complexity of identifying available REs for data reception increases
Solution Approach 1:
The patent introduces a third pattern of REs as an intermediary structure that combines information from multiple cell reference signal patterns. This third pattern serves as a mediator that allows the terminal to identify available REs across multiple cells without having to independently process each cell's pattern, thereby reducing complexity while maintaining the flexibility to handle different reference signal configurations.
Solution Approach 2:
The patent merges the reference signal patterns from multiple cells into a unified third pattern that represents the combined available REs. By combining the patterns from the first cell, second cell, and any additional cells into a single consolidated pattern, the system simplifies the terminal's task of identifying available REs while preserving the adaptability to handle diverse reference signal configurations across different cells.
2Measurement precision
If signaling information includes detailed pattern configurations from all cells, then data reception accuracy is improved, but signaling overhead increases
Solution Approach 1:
The patent extracts only the essential information needed to determine available REs from the full pattern configurations of all cells. Instead of signaling complete pattern details from every cell, the system extracts and transmits only the critical pattern information necessary to derive the third pattern, thereby reducing signaling overhead while maintaining sufficient precision for accurate data reception.
Solution Approach 2:
The third pattern of REs serves multiple functions simultaneously: it represents the union of available REs from all cells, provides the basis for data reception, and eliminates the need for the terminal to process individual cell patterns separately. This multi-functionality reduces the amount of signaling information needed while maintaining data reception accuracy.
Data Source
AI summary
A method includes receiving in a mobile communication terminal signals from a group of cells that cooperate in a Coordinated Multipoint (CoMP) transmission scheme. Signaling information is received from a first cell in the group. The signaling information is indicative of a first pattern of time-frequency Resource Elements (REs) used by the first cell for transmitting reference signals, and is further indicative of a second pattern of the REs used by a second cell in the group for transmitting the reference signals. A third pattern of the REs, which are available for receiving data from the cells, is derived in the terminal from the signaling information that is indicative of the first and second patterns. The data from the cells is received in the terminal in one or more of the REs in the third pattern.