MBSFN Subframe Dynamic Allocation for Interference Coordination
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Solution Overview
Problem
Existing methods for controlling the use of MBSFN subframes in base stations require semi-fixed notifications, leading to reduced standby time and inefficient resource utilization, especially in variable data traffic scenarios like voice communication.
Innovation Solution
A base station configuration that dynamically determines the use of MBSFN subframes for either multicast transmission or inter-cell interference coordination based on the presence or absence of transmission data, allowing flexible switching without reducing resource utilization efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If base stations use semi-fixed notification via SIB to control MBSFN subframe switching, then inter-cell interference coordination can be implemented, but terminal standby time is reduced and resource utilization efficiency decreases
Solution Approach 1:
The patent applies dynamics by enabling flexible switching between multicast transmission and interference coordination modes in MBSFN subframes. Instead of semi-fixed notification, the system dynamically determines the function of each MBSFN subframe based on whether data needs to be transmitted, allowing terminals to remain in standby state longer while maintaining reliable interference coordination when needed.
Solution Approach 2:
The patent changes the operational parameters of MBSFN subframes by introducing a dynamic determination mechanism. The system adjusts the function of MBSFN subframes based on data transmission needs, transitioning between multicast mode and interference coordination mode without requiring semi-fixed notifications, thereby preserving terminal standby time while maintaining coordination reliability.
2Adaptability or versatility
If base stations frequently notify SIB updates to switch MBSFN subframe usage, then multicast transmission can be flexibly controlled, but terminal resource consumption increases and standby state is disrupted
Solution Approach 1:
The system implements dynamic control of MBSFN subframe functionality based on actual data transmission requirements. The base station determines whether each MBSFN subframe should be used for multicast transmission or interference coordination in real-time, enabling flexible multicast control without frequent SIB notifications, thus reducing terminal energy consumption while maintaining adaptability.
Solution Approach 2:
The base station autonomously determines the appropriate function for each MBSFN subframe based on its own data transmission needs without requiring frequent notifications to terminals. This self-service approach allows the system to adapt multicast transmission control internally, reducing the burden on terminals and their energy consumption while preserving flexibility.
3Object-affected harmful factors
If MBSFN subframes are used for interference avoidance by stopping data transmission, then inter-cell interference is reduced, but resource utilization efficiency decreases due to semi-fixed allocation
Solution Approach 1:
The patent implements dynamic allocation of MBSFN subframes for interference coordination based on actual data transmission needs. Instead of semi-fixed allocation where resources remain idle, the system dynamically determines whether each MBSFN subframe should perform interference coordination or multicast transmission, reducing inter-cell interference only when necessary and improving overall resource utilization efficiency.
Solution Approach 2:
The system changes the operational state of MBSFN subframes from semi-fixed to dynamic based on data transmission requirements. When data needs to be transmitted, the subframe operates in multicast mode; when interference coordination is needed, it switches to coordination mode. This parameter change eliminates wasted resources while maintaining interference reduction effectiveness.
Data Source
AI summary
Multicast transmission and inter-cell interference coordination can be flexibly switched using Multicast-Broadcast Single Frequency Network (MBSFN) subframe without reduction of resource utilization efficiency. A transmission data determination unit determines that a first area is used as either of a first subframe performing multicast transmission or a second subframe performing inter-cell interference coordination based on presence or absence of transmission data in each of the first area which is configured to have at least some subframes among a plurality of MBSFN subframes. Wireless communication IF unit performs a transmission process in the first area according to a determination result.