eMBMS Group Communication Area Filtering With Dynamic Identifiers
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Solution Overview
Problem
Existing evolved packet system (EPS) architectures for group communication, such as eMBMS, lack the ability to dynamically determine and restrict group communication areas based on the nature of the incident, leading to inefficient and uncontrolled broadcasting.
Innovation Solution
Implementing a mechanism that converts geographical or logical area names into cell or tracking area identifiers, allowing for dynamic determination of group communication areas, and enabling per-cell or per-tracking area restrictions, with options for single bearer establishment and distribution filtering.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If broadcast services are provided across the entire network without area restrictions, then service coverage is maximized, but network resources are wasted through unnecessary broadcasting in areas where no users are present
Solution Approach 1:
The patent segments the broadcast area into specific geographic regions defined by area identifiers (such as LAC-RAC combinations). Instead of broadcasting across the entire network, the system divides the coverage into discrete area segments and selectively activates broadcasting only in those segments where group members are present, thereby reducing unnecessary network resource consumption while maintaining comprehensive coverage where needed.
Solution Approach 2:
The patent implements local quality by allowing different broadcast configurations in different geographic areas. The system determines area-specific broadcast parameters based on the presence and distribution of group members in each region, enabling optimized resource allocation where broadcasting is active versus areas where it is suppressed, thus addressing the contradiction between coverage and resource efficiency.
2Loss of energy
If group communication is restricted to specific cells or tracking areas, then network resources are optimized, but the complexity of area management and bearer establishment increases
Solution Approach 1:
The patent applies universality by using a standardized area identifier format (such as LAC-RAC combinations) that can represent multiple geographic scales and types uniformly. This universal identifier system allows the network to manage diverse area restrictions through a single mechanism, reducing the complexity that would otherwise arise from handling different area types separately while maintaining resource optimization benefits.
Solution Approach 2:
The patent introduces area identifiers as an intermediary layer between the application layer and the network infrastructure. These identifiers act as mediators that translate high-level geographic concepts into network-specific parameters, simplifying the management of area restrictions by providing an abstraction layer that handles the complexity of mapping between application-defined areas and network cells/tracking areas.
3Measurement precision
If multiple bearers are established for different areas, then precise area control is achieved, but the device and network complexity increases significantly
Solution Approach 1:
The patent merges multiple area-specific broadcast configurations into a single unified bearer when possible. By evaluating whether multiple area restrictions can be satisfied by one bearer, the system combines what would otherwise require separate bearers, thereby maintaining precise area control through the unified bearer's area identifier filters while significantly reducing the complexity of managing multiple separate bearers.
Data Source
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AI summary
Various communications may benefit from enhancements for group communication. For example, evolved packet system including an evolved multimedia broadcast/multicast service may benefit from such enhancements. For example, a method may include preparing a list of area names, identities, or both area names and identities to a network element. Moreover, a method may also include requesting the network to broadcast data to a broadcast area defined by the list. The list can define an allowed area, a broadcast area, or both.