User Equipment Relay State Measurement Triggering
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Solution Overview
Problem
In wireless radio networks, especially in relay scenarios, handovers between cells do not occur when signal strength remains above a threshold, preventing the network from switching to a more suitable relay point or base station, even if it offers better communication conditions, due to lack of neighbor cell measurements.
Innovation Solution
A method where user equipment determines a relayed communication state and initiates measurements of direct radio transmission links independently of signal quality, allowing for handovers to be triggered even when signal quality is sufficient, by activating measurement gaps or reporting degraded transmission quality, enabling improved capacity and load balancing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If neighbor cell measurements are triggered only when signal strength falls below a threshold, then measurement resources are conserved and current communication is maintained, but handover to a more suitable relay point or base station cannot occur even when better conditions exist in neighboring cells
Solution Approach 1:
The patent changes the measurement triggering parameter from signal strength threshold to relayed communication state detection. When the UE determines it is communicating via a relay node, it automatically initiates neighbor cell measurements regardless of signal strength, thereby improving handover decision accuracy without increasing system complexity
Solution Approach 2:
The patent introduces feedback mechanisms where the UE reports relayed communication state to the network, and the network configures appropriate measurement parameters based on this feedback. This enables adaptive measurement triggering that improves handover reliability while maintaining manageable complexity through standardized feedback protocols
2Reliability
If the user equipment continuously monitors neighboring cells, then handover opportunities are not missed, but measurement overhead and power consumption increase
Solution Approach 1:
The patent applies preliminary action by having the UE determine the relayed communication state in advance and proactively initiate neighbor cell measurements only when needed. This prevents continuous monitoring while ensuring measurements are performed before handover decisions are required, improving reliability without excessive power consumption
Solution Approach 2:
The patent implements dynamic measurement triggering based on the relayed communication state. Measurements are activated dynamically when relayed communication is detected and deactivated when direct communication is established, thereby maintaining high handover reliability while adapting power consumption to actual network conditions
3Ease of operation
If the network provides a single measurement gap pattern for concurrent monitoring of all frequency layers, then measurement coordination is simplified, but measurement flexibility and adaptability to different relay scenarios are reduced
Solution Approach 1:
The patent segments the measurement gap configuration into multiple patterns with different characteristics. The network can select appropriate gap patterns based on the specific relay scenario and UE capabilities, providing both ease of operation through standardized patterns and adaptability through selective application of different patterns to different situations
Data Source
AI summary
The present invention relates to a method (300) for operating a user equipment (106) in a wireless radio network (100). The wireless radio network (100) comprises a base station (101) and at least one node (105) configured to relay communication data between the user equipment (106) and the base station (101). According to the method, a relayed communication state is determined (301) and a measurement of characteristics of further direct radio transmission links between the user equipment (106) and the wireless radio network (100) is initiated (302) depending on the relayed communication state.