Global Point ID for Node Location Detection in Wireless Systems
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Solution Overview
Problem
In multi-node wireless communication systems, accurately determining the location of a terminal is challenging due to the use of a single physical cell ID by multiple nodes, which complicates the identification of the specific node the terminal is communicating with, leading to difficulties in system performance and positioning accuracy.
Innovation Solution
Assigning a global point ID (GPI) to each node, allowing them to generate distinct positioning reference signals, enabling the terminal to measure channel information and report it back to the base station, which can then estimate the terminal's location accurately.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If multiple nodes use the same physical cell ID to send positioning reference signals, then the system can operate with simplified cell identification, but the terminal cannot identify which specific node has sent the signal, reducing positioning accuracy
Solution Approach 1:
The patent segments the cell identification function into two parts: physical cell ID for basic cell identification and global point ID for specific node identification. This segmentation allows multiple nodes to share the same physical cell ID while still being distinguishable through their unique global point IDs, thereby resolving the contradiction between simplified cell identification and accurate node identification for positioning.
Solution Approach 2:
The patent introduces global point ID as an intermediary identifier that mediates between the physical cell ID (shared by multiple nodes) and the need for specific node identification. The global point ID acts as a unique fingerprint for each node within the same cell, enabling the terminal to identify which specific node has sent the positioning reference signal without complicating the overall cell identification system.
2Ease of operation
If multiple nodes use the same physical cell ID, then the system can maintain unified cell management, but the base station cannot accurately determine the terminal's location from measurement results
Solution Approach 1:
The patent segments the identification system into physical cell ID for unified cell management and global point ID for specific node identification. This allows the base station to maintain simplified cell-level management while simultaneously tracking which specific node (identified by global point ID) the terminal is communicating with, thereby preventing loss of location information.
Solution Approach 2:
The patent implements a feedback mechanism where the terminal measures positioning reference signals and reports the results along with the global point ID of the transmitting node to the base station. This feedback loop enables the base station to accurately determine the terminal's location by receiving measurement results associated with specific node identifiers, resolving the information loss problem.
3Quantity of substance
If a single physical cell ID is used by multiple nodes, then the system can reduce identification overhead, but the terminal cannot distinguish between different nodes for accurate positioning
Solution Approach 1:
The patent segments the identification function into two hierarchical levels: physical cell ID for broad cell-level identification and global point ID for specific node-level identification. This segmentation reduces overall identification overhead by allowing multiple nodes to share the physical cell ID while providing unique global point IDs for precise node differentiation, thus resolving the contradiction between reduced overhead and precise identification.
Solution Approach 2:
The patent adds another dimension to the identification system by introducing global point ID as a secondary identifier layer. Instead of using a single identifier that would require more bits, the system uses a two-dimensional identification approach: physical cell ID for the first dimension (cell level) and global point ID for the second dimension (node level), achieving efficient identification with minimal overhead.
Data Source
AI summary
Provided are a method and an apparatus for detecting the locations of terminals in a multi-node system. A plurality of nodes transmit location reference signals which are distinguished by node, and a terminal performs feedback of channel information on each node using the location reference signals. Various signaling for detecting the locations of the terminals may be performed for each node, that is, for each point, rather than cell-based signaling.