WTRU-Centric Transmission Point Sets for Wireless Feedback Overhead
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Solution Overview
Problem
In wireless communication networks, particularly in LTE systems, the feedback overhead from wireless transmit/receive units (WTRUs) to multiple transmission and reception points leads to resource consumption and reduced system throughput, especially in scenarios where WTRUs share similar points, impacting battery life and system efficiency.
Innovation Solution
Implementing WTRU-centric transmission point sets that allow dynamic adaptation of transmission points without extensive reconfiguration signaling, using WTRU-specific IDs and self-contained subframes for measurement and feedback resources, and enabling event-triggered CSI feedback to reduce signaling overhead.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If WTRUs report measurements on all transmission points in an area, then the network can maintain comprehensive coverage and reliability, but feedback overhead increases significantly consuming resources and reducing system throughput
Solution Approach 1:
The patent divides the set of all transmission points into multiple subsets, where each WTRU is configured to report measurements only on a specific subset rather than all transmission points. This segmentation reduces feedback overhead while maintaining comprehensive network coverage through coordinated subsets.
Solution Approach 2:
The patent enables dynamic adaptation of transmission point sets based on WTRU mobility and channel conditions. The network can reconfigure which transmission points belong to which WTRU's measurement set, allowing the system to adapt to changing conditions without requiring full reconfiguration signaling.
2Productivity
If WTRUs share similar transmission and reception points, then resource utilization improves, but feedback overhead increases due to redundant reporting
Solution Approach 1:
The patent merges the measurement reporting of multiple WTRUs that share similar transmission and reception points. By grouping WTRUs with similar characteristics and having them report on shared transmission point subsets, the system reduces redundant feedback while maintaining effective resource utilization.
3Adaptability or versatility
If extensive reconfiguration signaling is used to adapt transmission points, then the system can maintain optimal performance for mobile WTRUs, but signaling overhead and battery consumption increase
Solution Approach 1:
The patent performs preliminary configuration of transmission point sets and measurement subsets before WTRU mobility issues arise. By pre-configuring multiple subsets and establishing measurement reporting rules in advance, the system reduces the need for frequent reconfiguration signaling during mobility events, thereby conserving WTRU battery life.
4Adaptability or versatility
If configuration and reconfiguration of transmission point subsets is performed frequently, then mobile WTRUs can maintain optimal connections, but overhead increases significantly
Solution Approach 1:
The patent implements dynamic subset configuration where the network can efficiently reconfigure which transmission points belong to which WTRU's measurement set based on mobility and channel conditions. This dynamic approach maintains optimal connections for mobile WTRUs while reducing configuration overhead through intelligent reconfiguration strategies.
Data Source
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AI summary
WTRU-Centric Transmission is disclosed. A WTRU may communicate using a set of WTRU-specific cell IDs (WCIDs). A WTRU may be configured with a WCID and/or set of WCIDs, for example, by a serving cell and/or eNB and/or by autonomous selection. A WTRU may be configured with and/or may use one or more WCIDs, for example, based on a resource, channel, subband, time, subframe, signal type, transmission type, function (e.g. sequence generation), service type, etc. A WTRU may indicate its presence by transmitting a WTRU presence indicator, e.g., to enable a network to send appropriate transmissions using one or more WTRU WCIDs. Resources for measurements and/or reporting, e.g., for channel state information (CSI) processes, may be dynamically controlled. A WTRU may be dynamically reconfigured (e.g. without radio resource control (RRC) transmissions) to adapt WTRU-centric communication to changing sets of cooperating transmission points.