Coordinated Radio Resource Management for Multicast Interference
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Solution Overview
Problem
Conventional distributed Radio Resource Management (RRM) architectures in wireless communication systems face increased complexity in hand-offs and interference mitigation, and lack coordination of multiple node-Bs during multicast/broadcast transmissions, which hinders macro diversity combining of signals.
Innovation Solution
A coordinated RRM scheme is implemented, enabling inter-RRM communication protocols, radio resource elements, and decision functions for joint management among distributed RRM functions, allowing peer-to-peer, one-to-many, and broadcast communications to optimize resource allocation and interference coordination, particularly during handovers and multicast/broadcast services.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If distributed Radio Resource Management (RRM) architecture is implemented, then system scalability and flexibility are improved, but hand-off complexity and interference mitigation difficulty increase
Solution Approach 1:
The patent introduces a coordination entity that acts as an intermediary between multiple distributed RRM entities. This mediator coordinates hand-off decisions and resource allocation across distributed nodes, reducing the complexity that would otherwise arise from direct peer-to-peer coordination between all RRM entities.
Solution Approach 2:
The patent combines multiple distributed RRM functions into a coordinated framework where decisions are made jointly rather than independently. By merging the coordination function at a higher level while maintaining distributed execution, the system achieves scalability without proportionally increasing hand-off complexity.
2Reliability
If multiple node-Bs transmit simultaneously for multicast/broadcast services, then service coverage and reliability are improved, but signal interference increases
Solution Approach 1:
The patent implements coordinated scheduling where multiple node-Bs transmit multicast/broadcast services in synchronized periodic intervals. By coordinating transmission timing and using periodic patterns, the system achieves reliable coverage through multiple nodes while reducing interference through time-division coordination.
Solution Approach 2:
The patent applies different transmission parameters and resource allocation strategies to different local areas and node-Bs based on their specific interference conditions. This allows simultaneous transmissions from multiple node-Bs while adapting local qualities to minimize interference in each region.
3Adaptability or versatility
If conventional distributed RRM architecture is used, then system deployment flexibility is improved, but coordination of multiple node-Bs during multicast/broadcast transmissions is not permitted
Solution Approach 1:
The patent segments the coordination function from the execution function. Multiple RRM entities can be deployed flexibly in distributed locations, while a separate coordination mechanism handles the coordination of multicast/broadcast transmissions. This segmentation allows deployment flexibility to be maintained while adding coordination capability.
Solution Approach 2:
The patent creates a universal coordination framework that works across different deployment scenarios and service types. The coordination mechanism is designed to be multi-functional, handling both unicast and multicast/broadcast services, as well as various hand-off scenarios, thereby improving ease of operation without sacrificing deployment flexibility.
Data Source
AI summary
A method for coordinating control of radio resources for multicast/broadcast services in distributed radio resource management. The method includes communicating information between a plurality of units having radio resource management responsibilities. The communicated information is related to coordinating at least one multicast/broadcast service provided by the plurality of units.