Emergency Network Access Handling for RedCap Radio Devices
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Solution Overview
Problem
Existing cellular communication systems reject emergency-related network access requests from reduced capability user equipment (RedCap devices) due to their reduced number of receive chains without first determining the nature of the request, violating FCC guidelines.
Innovation Solution
A base station receives a random access preamble from RedCap devices indicating the number of receive branches and the emergency nature of the request, allowing it to determine whether to fulfill the connection request and prioritize emergency access.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the base station rejects connection requests from reduced capability user equipment with fewer receive chains than required, then the network maintains its capability requirements, but emergency service access is denied
Solution Approach 1:
The base station performs preliminary assessment of the connection request purpose before enforcing receive chain requirements. By evaluating whether the request is for emergency services first, the system can then apply appropriate acceptance criteria, allowing RedCap devices to access emergency services even with reduced receive chains
Solution Approach 2:
Different capability requirements are applied to different types of connection requests. Emergency service requests receive relaxed requirements regarding receive chain数量, while non-emergency requests maintain standard requirements, creating localized quality adjustments based on request type
2Reliability
If the base station accepts all connection requests without evaluating the nature of the request, then emergency access is ensured, but network resources are wasted on non-urgent connections
Solution Approach 1:
The base station implements a feedback mechanism where the purpose of the connection request is communicated back to the device. The base station evaluates the request type and provides appropriate responses, enabling differentiated resource allocation based on whether the connection is for emergency or non-emergency purposes
Solution Approach 2:
The base station dynamically adjusts its acceptance criteria based on the evaluated purpose of each connection request. For emergency requests, the base station applies relaxed criteria to ensure access, while for non-emergency requests, it maintains stricter resource management policies
Data Source
Figure 1~2
Figure 3~4
Figure 5A
AI summary
An electronic device may transmit a communication request to a base station having an indication of a number of its receive branches and an indication of whether the communication request is designated as an urgent service fulfillment. The base station may delay a denial of the communication request until receiving the indication of whether the communication request is designated as using the urgent service fulfillment to reduce a likelihood of prematurely rejecting the communication request. The base station may also handover the communication request to a base station that supports the urgent service fulfillment. The base station may also be barred from transferring the user equipment to a frequency layer preferred by the base station when the communication request of the user equipment is designated as an urgent service fulfillment.