5G Location Assistance Broadcast Based on UE Count and Area
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Solution Overview
Problem
Existing wireless communication systems face inefficiencies in providing location services, particularly in managing and optimizing the broadcast of network assistance data to user equipment (UEs) in large-scale networks.
Innovation Solution
A method involving a location management function (LMF) and access and mobility management function (AMF) to manage and optimize the broadcast of network assistance data by counting UEs with ciphering keys and determining thresholds for broadcasting based on UE numbers and types, using a subscription request and transfer request mechanism.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If network assistance data is broadcast to all UEs in a geographical area, then location service availability is improved, but network resource consumption increases
Solution Approach 1:
The patent applies local quality by differentiating assistance data delivery based on UE characteristics. UEs with ciphering keys receive broadcast assistance data in geographical areas, while UEs without ciphering keys receive data through unicast delivery. This selective approach ensures location service availability is maintained for authorized UEs while reducing unnecessary network resource consumption by avoiding broadcast to all UEs regardless of their authorization status.
2Measurement precision
If assistance data is delivered to all requesting UEs individually, then service precision is improved, but signaling overhead increases
Solution Approach 1:
The patent merges assistance data delivery by combining broadcast and unicast mechanisms. When multiple UEs in the same geographical area require assistance data, the system broadcasts the data once to reach multiple UEs simultaneously, rather than sending individual unicast messages to each UE. This merging approach maintains location service precision for each UE while significantly reducing signaling overhead by eliminating redundant data transmissions.
3Speed
If broadcast assistance data is used, then service speed is improved, but security control becomes more difficult
Solution Approach 1:
The patent applies dynamics by making the assistance data delivery method adaptive based on UE authorization status. The system dynamically selects between broadcast and unicast delivery modes: broadcast is used when UEs have ciphering keys and are in the same geographical area (providing fast delivery), while unicast is used for UEs without ciphering keys or in different areas. This dynamic approach maintains fast service speed while simplifying security control by using established ciphering key verification mechanisms.
Data Source
AI summary
The disclosure relates to a 5G or 6G communication system for supporting a higher data transmission rate. An embodiment of the disclosure may disclose a method performed by a location management function (LMF), and the method may include transmitting, to an access and mobility management function (AMF), a subscription request message including an assistance data type and an event identifier (ID) indicating a number of user equipments (UEs) in a geographical area; receiving, from the AMF, a number of UEs in the geographical area, wherein the UEs are associated with the assistance data type; determining whether to perform broadcast of network assistance data based on the number of UEs in the geographical area; and transmitting, to the AMF, a transfer request message including network assistance data in response to determination of performing broadcast.