Dynamic Multicast Sector Selection for Spectral Efficiency
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current communication standards, such as LTE Release 9, do not provide methods for selecting transmitters or managing users in multicast or broadcast communication based on spectral efficiency, RF signal conditions, and mobility, leading to inefficiencies in group calls.
Innovation Solution
A method and system that dynamically select communication sectors for each user device based on signal strength and calculate a spectral efficiency metric to establish and maintain a spectrally efficient multicast group call by forming a multicast communication zone and optimizing the use of communication resources.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If multicast or broadcast communication is used to serve users in a geographic area, then communication efficiency is improved, but spectral efficiency deteriorates due to lack of dynamic transmitter selection and user management
Solution Approach 1:
The patent implements dynamic selection of communication sectors for each user device based on real-time signal strength measurements. The system continuously monitors RF signal conditions and adjusts the multicast communication zone composition accordingly, transitioning from static to dynamic resource allocation to optimize spectral efficiency while maintaining communication efficiency.
Solution Approach 2:
The system changes key parameters including spectral efficiency metrics, signal strength thresholds, and user device inclusion/exclusion criteria based on monitored conditions. By dynamically adjusting these parameters, the system optimizes the balance between communication efficiency and spectral efficiency, resolving the contradiction between serving more users and conserving spectral resources.
2Device complexity
If users are included or removed from multicast communication based on static criteria, then system complexity is reduced, but spectral efficiency and adaptability deteriorate
Solution Approach 1:
The patent implements a feedback mechanism where the system continuously monitors RF signal conditions, signal strength, and spectral efficiency metrics of user devices. Based on this feedback, the system dynamically adjusts user inclusion/exclusion from multicast zones and sector selections, enabling adaptability without excessive complexity through automated threshold-based decision making.
Solution Approach 2:
The system enables user devices to effectively participate in multicast communication by automatically selecting optimal communication sectors based on their signal strength measurements. Each user device's connection status is self-adjusted based on monitored conditions, reducing manual intervention while improving spectral efficiency through adaptive user management.
3Reliability
If communication sectors are selected based on signal strength measurements, then signal quality is improved, but system complexity and measurement requirements increase
Solution Approach 1:
The patent applies partial action by selecting communication sectors based on signal strength measurements only for user devices participating in multicast zones, rather than all devices. This selective measurement approach improves signal quality for relevant users while limiting the complexity increase to only the necessary subset of devices and parameters.
4Loss of energy
If dynamic sector selection and user management are implemented, then spectral efficiency is improved, but computational requirements and processing complexity increase
Solution Approach 1:
The system performs preliminary actions by pre-establishing measurement thresholds, spectral efficiency criteria, and sector selection rules before actual multicast communication begins. This preparation reduces real-time computational requirements by having decision criteria ready, thereby improving spectral efficiency through dynamic selection while limiting processing complexity through pre-computed parameters.
Data Source
Figure 1
Figure 2
Figure 3
AI summary
A method, device, and system for establishing and maintaining a multicast group call. One or more link parameters for each of a plurality of communication devices (112-n, 122-n) associated with the multicast group call are monitored. For each of the plurality of communication devices, a sector is selected from a plurality of permitted sectors (110-n, 120-n). The selected sector provides an associated highest signal strength for the communication device and forms a multicast communication zone (150) based on the selected sectors. A signal to interference plus noise ratio is calculated for each communication device based on the formed multicast communication zone. A communication device with a lowest SINR is identified. A spectral efficiency metric is updated relative to the formed multicast communication zone based on the lowest SINR. The multicast group call is established when the updated spectral efficiency metric meets a minimum expected spectral efficiency metric.