Master-Slave MCBCS Proxy Coordination for Macro Diversity
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Solution Overview
Problem
Current wireless communication systems, particularly WiMAX systems based on the IEEE 802.16 standard, lack a detailed plan to support MultiCast and BroadCast Service (MCBCS) and macro diversity, especially in scenarios with multiple Access Service Networks (ASNs) within a single Multicast and Broadcast Service (MBS) zone, which hinders efficient content delivery and mobility.
Innovation Solution
The method involves selecting a master MCBCS proxy among multiple MCBCS proxies to manage and transmit Layer 2 information for macro diversity, with slave proxies acting under the master's control to ensure all Base Stations in the zone receive consistent MCBCS control information, enabling efficient MCBCS content delivery and macro diversity gain.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple MCBCS proxies are deployed across multiple ASNs in one MBS zone, then service coverage and reliability are improved, but system complexity and coordination overhead increase
Solution Approach 1:
The patent segments the MCBCS proxy functions into master and slave roles. The master MCBCS proxy (first proxy) handles critical coordination tasks including receiving session start messages, determining MBS zone membership, and notifying slave proxies. Slave proxies (other proxies) handle local execution tasks. This segmentation reduces overall system complexity by centralizing decision-making while distributing execution.
Solution Approach 2:
The master MCBCS proxy acts as an intermediary between the MCBCS controller and slave proxies. It receives session start messages from the controller, processes MBS zone information, and coordinates with slave proxies through standardized notifications. This intermediary role simplifies the interaction model and reduces coordination overhead across multiple ASNs.
2Reliability
If MCBCS control information is distributed to all Base Stations, then macro diversity gain is achieved, but information consistency and synchronization become more difficult to maintain
Solution Approach 1:
The master MCBCS proxy performs preliminary actions by determining MBS zone membership and identifying which Base Stations should receive MCBCS control information before distribution. It proactively notifies slave proxies and Base Stations with the necessary information, ensuring that all recipients are prepared to maintain consistency. This preliminary coordination prevents synchronization issues during actual information distribution.
3Productivity
If a detailed plan for MCBCS support is implemented across multiple ASNs, then service efficiency is improved, but implementation complexity and standardization challenges increase
Solution Approach 1:
The patent establishes a universal master-slave proxy architecture that can be deployed across multiple ASNs with different configurations. The master proxy handles universal coordination functions (receiving session start messages, determining MBS zone membership), while slave proxies handle universal execution functions. This universal framework simplifies implementation across diverse network environments while maintaining high service efficiency.
Data Source
AI summary
An apparatus and method for supporting MultiCast and BroadCast Service (MCBCS) proxy selection for MCBCS and macro diversity in a wireless communication system is provided. The apparatus and method selects a first MCBCS proxy among MCBCS proxies in the plurality of ASNs as a master MCBCS proxy, and selects other MCBCS proxies except for the first MCBCS proxy as slave MCBCS proxies, and the first MCBCS proxy transmits information for macro diversity to the slave MCBCS proxies, wherein the master MCBCS proxy first receives an MCBCS join message from a Mobile Station (MS) in one Multicast and Broadcast Service (MBS) zone.