Access Node Paging Message Forwarding Mechanism
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Solution Overview
Problem
The existing communication systems experience a substantial increase in messaging when a wireless device in idle or sleep mode does not respond to paging messages, leading to inefficient routing of messages across multiple access nodes.
Innovation Solution
A method where the first access node forwards a paging message to a second access node within the same coverage area without involving intervening network nodes, and sends a message to the controller node to prevent further paging messages, thereby reducing unnecessary messaging.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If paging messages are sent to all access nodes in tracking area and tracking area list when device does not respond, then the wireless device can be reached, but system messaging increases substantially
Solution Approach 1:
The patent segments the paging process into two distinct phases: intra-tracking area paging and inter-tracking area list paging. Access nodes first attempt to page the device within their own tracking area, and only if unsuccessful do they forward paging messages to other access nodes in the tracking area list. This segmentation prevents unnecessary system-wide paging messages when the device is merely in a different cell within the same tracking area, thereby reducing overall system messaging while maintaining reliable delivery.
Solution Approach 2:
The patent introduces access nodes as intermediaries that receive paging messages from the network and determine whether to forward them to other access nodes. Instead of the network directly paging all access nodes in the tracking area list, the first access node acts as an intermediary that intelligently routes paging messages only when necessary, reducing unnecessary messaging while ensuring the device is reached.
2Reliability
If paging messages are broadcast to multiple access nodes, then the wireless device can be located, but communication efficiency decreases
Solution Approach 1:
The patent divides the paging process into hierarchical stages: first attempting to page within the tracking area, then escalating to the tracking area list only if necessary. This segmented approach ensures device location is achieved while minimizing the number of access nodes involved in the paging process, thereby maintaining communication efficiency.
Solution Approach 2:
The patent applies partial action by having access nodes forward paging messages to only those specific access nodes in the tracking area list that are necessary to reach the device, rather than broadcasting to all access nodes. This selective forwarding maintains the ability to locate the device while improving communication efficiency by avoiding excessive messaging.
Data Source
AI summary
A paging message is received at a first access node for a wireless device. It is determined by the first access node that the wireless device is unavailable at the first access node, and the paging message is forwarded from the first access node to a second access node over a communication link between the first access node and the second access node. A message can also be sent from the first access node to a controller node to prevent the sending of a second paging message from the controller node.