Wireless Signaling Intermediary for Tracking Area Management
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Solution Overview
Problem
The existing registration and paging process in wireless communication systems leads to significant signaling and processing load on the paging controller, particularly when devices frequently move between coverage areas, causing potential overload and inefficiencies.
Innovation Solution
Implementing an intermediary that manages registration and paging signaling between base stations and the paging controller, where each base station is considered a separate tracking area, and the intermediary determines whether a tracking-area update (TAU) represents a movement within or between groups of base stations, forwarding TAUs only for inter-group movements and optimizing paging messages to reach the correct base station.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If each base station is considered a separate tracking area and the WCD registers with the paging controller every time it moves to a new coverage area, then the paging controller can accurately track the WCD's location, but the signaling and processing load on the paging controller increases significantly
Solution Approach 1:
The patent segments the network into groups of base stations, where each group is served by a local intermediary rather than requiring direct communication with the central paging controller. This segmentation allows the system to maintain accurate location tracking within groups while reducing the signaling burden on the paging controller by processing registration messages locally at intermediaries.
Solution Approach 2:
The patent introduces intermediaries between the base stations and the paging controller. These intermediaries receive registration messages from WCDs, determine whether the WCD has moved to a new group, and only forward registration messages to the paging controller when necessary. This intermediary layer maintains location accuracy while filtering out unnecessary signaling traffic.
2Reliability
If the paging controller pages all base stations in a tracking area when a WCD is not responding, then the WCD can be reliably located and paged, but unnecessary paging messages are transmitted to base stations where the WCD is not present
Solution Approach 1:
Intermediaries maintain local records of which base stations currently serve active WCDs. When a paging message needs to be transmitted, the intermediary uses these records to identify only the relevant base stations within its group, preventing unnecessary paging messages from being sent to base stations where the WCD is not present.
Solution Approach 2:
Each intermediary maintains localized information about the WCDs served by base stations in its group. This local quality allows the system to make intelligent paging decisions at the group level without requiring the paging controller to communicate with every individual base station, thereby reducing wasted paging attempts.
3Productivity
If the system uses tracking areas to reduce registration signaling, then the paging controller load is reduced, but the system complexity increases due to the need to manage tracking area boundaries and groupings
Solution Approach 1:
The patent assigns intermediaries to manage tracking area boundaries and groupings automatically. The intermediaries handle the complexity of determining when a WCD has moved to a new group and whether registration messages should be forwarded to the paging controller. This removes the complexity management burden from the central paging controller and distributes it to local intermediary nodes.
Data Source
AI summary
Disclosed is a method and system for managing signaling in wireless communication network. Base stations in the network will be divided into groups, but each base station's coverage area will be deemed a separate respective tracking area, and, for each group of base stations, an intermediary will manage transmission of registration and paging signaling between a paging controller and the group of base stations. In practice, when a tracking-area update (TAU) arrives from a WCD in coverage of the group of base stations, the intermediary may forward the TAU to the paging controller only if the TAU represents the WCD's movement into coverage of the group of base stations. Further, when a paging message arrives for a WCD, the intermediary may forward the paging message to the appropriate base station in the group.