Discovery Reference Signal Activation for Wireless Communication
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current wireless communication systems, such as LTE, face challenges in efficiently transmitting and receiving reference signals between user equipment and transmission points, particularly in scenarios where multiple transmission points share a single physical cell ID, leading to complexities in radio resource control reconfiguration and channel state information measurement.
Innovation Solution
A method and apparatus that enable user equipment to receive a discovery reference signal from a second transmission point using configuration obtained from a first TP, activate a connection based on radio resource management measurements, and receive feedback reference signals for channel state information, allowing for connection activation without radio resource control reconfiguration when a single physical cell ID is shared between transmission points.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single physical cell ID is shared between multiple transmission points, then device complexity is reduced and connection switching becomes simpler, but radio resource control reconfiguration overhead increases
Solution Approach 1:
The patent segments the connection management process by introducing a secondary cell concept that can be independently activated or deactivated without triggering full RRC reconfiguration. This allows the UE to switch between transmission points at the radio resource management level rather than requiring complete connection re-establishment, thus reducing overall system overhead while maintaining simplified device complexity.
Solution Approach 2:
The patent implements preliminary configuration of secondary cells with shared physical cell IDs during initial RRC setup. By pre-configuring multiple transmission points with the same cell ID and establishing their relationships beforehand, the system avoids the need for repeated RRC reconfiguration messages when switching between these pre-configured points, thereby reducing signaling overhead.
2Reliability
If RRC reconfiguration is performed for each transmission point switch, then connection reliability is maintained, but communication efficiency and switching speed deteriorate
Solution Approach 1:
The patent introduces dynamic activation and deactivation mechanisms for secondary cells that allow rapid switching between transmission points without static RRC reconfiguration. The network can dynamically activate or deactivate secondary cells based on channel conditions and traffic requirements, enabling fast switching while maintaining connection reliability through predefined configuration parameters.
Solution Approach 2:
The patent uses radio resource management messages as an intermediary layer between the RRC protocol and physical layer switching. This intermediary mechanism allows the system to maintain RRC connection stability while enabling faster transmission point switching through MAC layer control, thus bridging the gap between reliability requirements and switching speed needs.
3Measurement precision
If multiple transmission points are activated for diversity, then channel state information measurement accuracy improves, but system overhead and processing complexity increase
Solution Approach 1:
The patent makes the discovery reference signal configuration universal by allowing the same reference signal structure to serve multiple functions: initial cell discovery, channel state information measurement, and transmission point identification. By configuring multiple transmission points with the same reference signal parameters, the system achieves diverse measurement capabilities without increasing processing complexity.
Solution Approach 2:
The patent enables measurement across multiple transmission points by changing the physical cell ID parameter while keeping other reference signal parameters constant. This allows the UE to measure channel state information from multiple TPs using the same measurement configuration template, improving measurement accuracy without requiring separate complex configurations for each transmission point.
Data Source
AI summary
Disclosed is a method for a terminal and a transmission point (TP) for transceiving a reference signal in a wireless communication system. The method according to an embodiment of the present invention comprises receiving a discovery reference signal (DRS) from a second TP by using a DRS configuration acquired from a first TP which shares a single physical cell ID with the second TP; and activating a connection to the second TP without a radio resource control (RRC) reconfiguration in accordance with the results of radio resource management (RRM) measurements of the DRS.