Radio Access Node Paging Escalation Strategy
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Solution Overview
Problem
The existing LTE network experiences high paging load and prolonged response times due to the escalation of paging procedures across multiple eNodeBs, which can involve up to 100 nodes, leading to inefficient resource utilization and increased signaling load.
Innovation Solution
The method involves escalating the paging procedure to a larger intermediate set of cells handled by multiple radio access nodes without reaching the full Tracking Area level, allowing for a more moderate and controlled signaling load by selecting cells based on traffic, handover, reestablishment, and load statistics to optimize page response time.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If paging procedure is escalated across multiple eNodeBs to ensure comprehensive coverage, then paging reliability is improved, but signaling load and response time deteriorate
Solution Approach 1:
The patent segments the paging procedure into multiple stages: first paging at eNodeB level, then escalating to Tracking Area level only if necessary. This segmentation allows the system to achieve reliable paging by progressively expanding the search area, while minimizing unnecessary signaling by stopping at the first successful stage.
Solution Approach 2:
The patent performs preliminary paging actions at the eNodeB level before escalating to the broader Tracking Area level. By attempting paging locally first and only expanding the scope if needed, the system prepares and executes paging actions in an optimized sequence that reduces overall response time and signaling load.
2Reliability
If paging procedure includes all eNodeBs in Tracking Area to ensure complete coverage, then paging reliability is improved, but signaling load increases
Solution Approach 1:
The patent applies partial action by including only the necessary subset of eNodeBs in the paging procedure. Instead of always paging all eNodeBs in a Tracking Area, the system first attempts paging at the individual eNodeB level, and only escalates to include more eNodeBs if the initial attempt fails, thus reducing overall signaling load while maintaining reliability.
3Area of stationary object
If paging is performed at Tracking Area level to cover extensive areas, then paging coverage is improved, but paging load and response time worsen
Solution Approach 1:
The patent segments the paging coverage area into hierarchical levels: individual eNodeB coverage areas first, then Tracking Area coverage if escalation is needed. This segmentation allows the system to achieve extensive paging coverage when necessary while maintaining high paging efficiency by limiting the scope to the minimum necessary area.
Solution Approach 2:
The patent implements dynamic paging scope adjustment based on the paging outcome. The system starts with a limited paging scope at eNodeB level and dynamically expands to Tracking Area level only if the initial paging attempt is unsuccessful, thus adapting the coverage area to the actual needs of each paging scenario.
Data Source
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AI summary
The present invention relates to a method in the radio access node for paging user equipment attached to a radio network. The steps performed by the radio access node include receiving (31) a core network paging message from a core network. A request for paging of the user equipment in a set of neighboring radio access nodes using paging level information in the core network paging message is identified (32), wherein the paging level information may include information that an escalated page is to be performed. A radio access node paging instruction is generated (33) in the radio access node receiving the paging message; the paging instruction including an escalated page instruction. The paging instruction is sent (34) to the set of neighboring radio access nodes, whereupon a page is initiated in at least one cell of each neighboring radio access node. The invention also relates to a radio access node configured to perform the inventive method.