UE Measurement Reporting for Network Redirection
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Solution Overview
Problem
Current wireless communication systems lack an effective method to redirect user equipment (UE) from congested frequencies to alternate frequencies with sufficient signal strength and quality during connection requests, leading to increased network congestion and inefficient load balancing.
Innovation Solution
The system sends a downlink neighbor frequency list for measurement, allowing the UE to assess and report on neighbor frequencies that meet specific criteria, enabling the network to redirect the UE to a target frequency with suitable signal strength and quality for connection establishment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the network accepts all connection requests on a congested frequency, then connection establishment is possible, but network congestion increases
Solution Approach 1:
The network performs preliminary actions by providing a neighbor frequency list to the UE before the connection request is fully processed. The UE measures neighbor frequencies in advance and includes measurement results in the connection request, enabling the network to make informed redirection decisions before congestion worsens.
Solution Approach 2:
Measurement results of neighbor frequencies act as an intermediary information element that enables the network to decide whether to accept or redirect a connection request. This intermediary data allows the network to balance connection acceptance with congestion management.
2Object-generated harmful factors
If the network redirects UE to alternate frequency without measurement information, then load balancing is achieved, but connection success probability decreases
Solution Approach 1:
The UE performs preliminary measurements of neighbor frequencies and stores the results before the connection request. When redirection is needed, the pre-measured results are immediately available, enabling fast and reliable redirection decisions without requiring additional measurement time.
Solution Approach 2:
The UE provides feedback in the form of measurement results for neighbor frequencies within the provided list. This feedback enables the network to make informed decisions about which frequency to redirect the UE to, ensuring the target frequency is suitable for connection establishment.
3Measurement precision
If the UE reports detailed measurement results for all neighbor frequencies, then redirection accuracy improves, but uplink control channel overhead increases
Solution Approach 1:
The network extracts only the necessary information by providing a specific neighbor frequency list to the UE. The UE measures only these selected frequencies and reports results only for frequencies within the provided list, avoiding unnecessary measurements and reports for all possible frequencies.
Solution Approach 2:
Instead of requiring uniform measurement of all frequencies, the system applies local quality by having the UE measure and report only for specific frequencies in the provided list that are relevant to the current situation, optimizing the balance between accuracy and overhead.
Data Source
AI summary
A network sends downlink a neighbor frequency list for redirection (with at least one neighbor frequency) for measurement, for example event-triggered measurement. For each frequency in the list which a user equipment UE finds to satisfy one or more criteria, for example event-triggering criteria, the idle-state or semi-idle-state UE then takes a measurement of the neighbor frequency and checks whether the measurement satisfies reporting criteria. The UE sends to its serving cell an indication of the neighbor frequency or frequencies whose measurement meets the reporting criteria, without reporting the measurement, such as in a RRC Connection Request message. The serving cell then redirects the UE to establish a connection on a target frequency selected from the indicated neighbor frequencies, and this redirect may be in a RRC Connection Reject message.