Location-Based Admission Control for Non-Terrestrial Networks
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Solution Overview
Problem
In non-terrestrial wireless communication networks, existing admission control methods struggle to effectively manage communication establishment procedures, particularly in scenarios where user equipment (UE) initiates connections from regions different from the core network's association, leading to improper camping on cells and increased latency and network interruptions.
Innovation Solution
Implementing location-based admission control, where user equipment transmits its location information during the random access procedure, allowing the base station to selectively accept or reject connections and trigger handovers or redirections based on the UE's location, thereby reducing the likelihood of improper camping and network resource misallocation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If existing admission control methods are used in non-terrestrial networks, then the connection establishment procedure can be completed, but the UE may camp on incorrect cells leading to network interruptions and increased latency
Solution Approach 1:
The patent applies preliminary action by performing admission control checks during the random access procedure before the UE completes connection establishment. The base station evaluates UE location information early in the process (during Msg3 or MsgA transmission) and can reject connections from unserved regions before they are fully established, preventing wasted time on improper camping and reducing overall latency.
Solution Approach 2:
The patent implements feedback by having the base station provide location-based admission control decisions during the random access procedure. The base station receives UE location information, evaluates it against served region criteria, and provides immediate feedback through acceptance or rejection decisions, preventing UE from camping on incorrect cells and reducing network interruptions.
2Productivity
If existing admission control methods are used, then connection procedures can proceed, but network resources may be misallocated to UEs in incorrect regions
Solution Approach 1:
The patent prevents network resource waste by performing admission control evaluation during the random access procedure before resources are fully allocated. The base station checks UE location information early and can reject connections from unserved regions before significant network resources are committed, ensuring efficient resource utilization and preventing energy waste on improper connections.
3Reliability
If location-based admission control is implemented, then improper camping is reduced, but the admission control process becomes more complex
Solution Approach 1:
The patent applies local quality by implementing location-based admission control specifically at the base station level during the random access procedure, rather than requiring system-wide changes. The base station uses UE location information (such as gNB ID or cell ID) to make local admission decisions, improving cell camping accuracy without requiring complex changes to the entire network architecture.
4Measurement precision
If location information is transmitted during random access, then admission control accuracy improves, but signaling overhead increases
Solution Approach 1:
The patent applies universality by using existing random access message structures (Msg3 or MsgA) that already contain UE identification information. The same messages used for connection establishment are also utilized to convey location information, allowing the system to achieve accurate location-based admission control without adding separate dedicated signaling channels or increasing overall signaling overhead.
Data Source
AI summary
Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment may transmit, to a base station associated with a non-terrestrial network and in connection with a random access procedure, a message that indicates a location of the user equipment; and receive a response to the message that indicates whether the message is accepted or rejected, the response being based at least in part on the location. Numerous other aspects are provided.