User Equipment Cell Reselection via Pre-Identified Access Points
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Solution Overview
Problem
Conventional cell reselection processes in small cell networks are inefficient and resource-intensive, leading to significant processing and signaling overhead when a backhaul link failure causes a loss of connection, as User Equipment (UE) must search and reattach to alternative radio access points.
Innovation Solution
A method where User Equipment (UE) identifies a default and an alternative default radio access point, prioritizing connections to these points, allowing for direct and efficient reconnection to the alternative default point upon loss of the primary connection, thereby reducing processing and signaling overhead.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional cell reselection process is used when backhaul link fails, then UE can find alternative radio access point, but significant processing overhead and signaling overhead occur
Solution Approach 1:
The patent pre-identifies and stores a list of candidate radio access points before backhaul link failure occurs. When failure happens, the UE directly selects from this pre-prepared list rather than performing full cell reselection procedures, thereby reducing processing overhead while maintaining connection reliability.
2Reliability
If conventional cell reselection process is used when backhaul link fails, then UE can re-establish service, but significant signaling overhead occurs
Solution Approach 1:
The network pre-identifies and provides candidate radio access point information to the UE before backhaul link failure. This preliminary action reduces the signaling required during failure recovery, as the UE does not need to perform extensive signaling exchanges to identify alternative access points.
Solution Approach 2:
The UE autonomously selects from the pre-identified candidate radio access points using stored information, reducing the need for network-controlled reselection signaling. This self-service approach minimizes signaling overhead while ensuring service continuity.
3Reliability
If small cell backhaul connection fails, then small cell deactivates transmitter, but UE loses connection and suffers service loss
Solution Approach 1:
The UE is provided with a pre-identified list of candidate radio access points before backhaul link failure occurs. When failure happens, the UE can immediately switch to an alternative access point from this list, significantly reducing service disruption time while maintaining network availability.
Data Source
AI summary
A method of operating User Equipment (110), UE, the UE being configured to connect to a wireless wide-area cellular telecommunications network (100), said telecommunications network comprising a plurality of radio access points (120, 130), and the method comprising the steps of: identifying, from the plurality of radio access points, a default radio access point for the UE; identifying, from the plurality of radio access points, an alternative default radio access point for the UE, wherein said identifying is performed based on the alternative default radio access point and the default radio access point having been simultaneously available to the UE for wireless connection and wherein the UE is instructed to connect to the default radio access point in preference to the alternative default radio access point; connecting the UE to the default radio access point (210); in response to the UE detecting a subsequent loss of connection with the default radio access point, the UE directly initiating only a connection with the identified alternative default radio access point (260).