Tracking Area Information Transmission in Wireless Paging
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Solution Overview
Problem
In wireless communication systems, the conventional method of broadcasting tracking area (TA) information incurs long delays and unnecessary overhead during paging procedures, especially when devices transition between cells, as the access network lacks complete knowledge of a UE's location, leading to inaccurate and inefficient paging.
Innovation Solution
A method where network devices receive TA information through non-paging messages from either terminal devices or control devices, allowing them to transmit this information to other nodes without broadcasting, thereby optimizing paging by determining the correct cell sets for paging based on this information.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the access network broadcasts paging messages to page a UE, then the UE can be reached, but it incurs long delay and unnecessary overhead
Solution Approach 1:
The patent applies preliminary action by having the network device obtain TA information from non-paging messages (such as attach accept, TA update accept, or service request messages) before the actual paging operation. This allows the network to prepare the correct cell set for paging in advance, so when paging is needed, the network can immediately page the UE in the correct cells without delay, resolving the contradiction between reliability and time loss.
2Reliability
If the access network broadcasts paging messages to page a UE, then the UE can be reached, but it generates unnecessary overhead
Solution Approach 1:
The patent extracts the TA information from the paging procedure itself and obtains it separately through non-paging messages. By taking out the TA information acquisition step from the paging process, the network can page the UE using targeted cell-specific messages rather than broad broadcasting, thereby maintaining paging reliability while significantly reducing signaling overhead.
3Loss of substance
If the network device pages the UE within its managed cells only, then the signaling overhead is reduced, but the paging accuracy decreases because the network device does not know all possible locations of the UE
Solution Approach 1:
The patent introduces TA information as an intermediary that bridges the gap between the network device's limited knowledge and the UE's actual location. By obtaining TA information from non-paging messages, the network device gains accurate location knowledge without needing to broadcast to all cells, thus maintaining both low overhead and high paging accuracy through this information mediator.
Data Source
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Figure 5A~5B
AI summary
Embodiments of the disclosure generally relate to transmission of TA information in a non-paging procedure. A network device receives, from a source node, a first message that is a non-paging message. The source node is one of a terminal device and a control device in a core network. Then, the network device obtains TA information about the terminal device from the first message and transmits, to a destination node, a second message generated based on the first message. The destination node is the other of the terminal device and the control device.