Multicast Location Tracking via Pre-Session Group Member Reports
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Solution Overview
Problem
Conventional wireless communication systems face inefficiencies in tracking the locations of multicast group members, leading to increased overhead and delay in multicast sessions due to the lack of precise location information before session initiation.
Innovation Solution
Access terminals send group member reports to the access network before multicast sessions, allowing the network to create and update a group member list with location information and timestamps, enabling more efficient location updates and reducing unnecessary transmissions during session establishment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional wireless communication systems track multicast group member locations without pre-session reporting, then the system maintains simpler signaling procedures, but the location tracking precision deteriorates leading to increased overhead and delay
Solution Approach 1:
The patent applies preliminary action by having access terminals send group member reports to the access network before multicast sessions are initiated. These pre-session reports contain location information that the network uses to establish accurate location tracking in advance, eliminating the need for extensive location updates during session establishment and thereby reducing delay.
Solution Approach 2:
The patent implements feedback mechanisms where access terminals periodically send location update reports to the access network, and the network uses this feedback information to maintain accurate group member location lists. This continuous feedback loop ensures precise location tracking while optimizing the timing and frequency of updates to minimize overhead.
2Measurement precision
If the access network requests frequent location updates from multicast group members, then the location information accuracy improves, but the signaling overhead increases
Solution Approach 1:
The patent applies periodic action by implementing scheduled location update reports where access terminals send location information at predetermined intervals rather than continuously or on every movement. This periodic reporting maintains adequate location accuracy while significantly reducing the quantity of signaling messages compared to continuous tracking.
Solution Approach 2:
By obtaining location information in advance through pre-session group member reports, the network reduces the need for frequent location updates during active sessions. This preliminary acquisition of location data decreases the overall signaling overhead while maintaining sufficient accuracy for multicast session management.
Data Source
AI summary
In an example, an access terminal sends a group member report to an access network, the group member report indicating a location of the access terminal and at least one multicast group, the group member report being sent before a multicast session associated with the multicast group is initiated, determines a location update rule, the location update rule being a manner in which to report location updates of the access terminal to the access network and reports location updates of the access terminal to the access network based on the determined location update rule.