PTM Transmission Mechanism Selection via Cell ID Counting
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Solution Overview
Problem
Current wireless communication systems face inefficiencies in delivering Point to Multipoint (PTM) services as they often broadcast content to all cells within an MBSFN area, wasting resources when only a few users are interested, as they lack a mechanism to selectively determine the optimal transmission mechanism based on user equipment (UE) distribution.
Innovation Solution
The network selects a transmission mechanism for PTM services by using cell identification information obtained through MBMS counting procedures, allowing it to choose between Multicast Broadcast Single Frequency Network (MBSFN) and Single Cell-Point to Multipoint (SC-PTM) based on the distribution of UE devices interested in the service, thereby optimizing resource use.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If MBSFN broadcast is used to deliver PTM services to all cells in the MBSFN area, then service coverage is improved, but communication resources are wasted when only a few users are interested
Solution Approach 1:
The patent applies local quality by differentiating transmission mechanisms based on geographic location and user distribution. Instead of uniformly applying MBSFN across all cells, the system selectively applies SC-PTM in cells where users are concentrated and MBSFN in cells where users are dispersed, optimizing resource usage for each local area based on its specific characteristics
Solution Approach 2:
The patent implements dynamics by enabling the network to dynamically select between MBSFN and SC-PTM transmission mechanisms based on real-time user equipment distribution information. The system adapts the transmission mode according to the spatial distribution of interested users, transitioning from static blanket coverage to dynamic, demand-driven transmission
2Device complexity
If the network lacks a mechanism to selectively determine the optimal transmission mechanism, then system complexity is reduced, but resource allocation efficiency deteriorates
Solution Approach 1:
The patent implements feedback by utilizing MBMS counting procedure results that provide the network with information about user equipment distribution across cells. This feedback mechanism enables the network to make informed decisions about transmission mechanism selection, balancing user distribution patterns with resource efficiency without requiring complex autonomous optimization algorithms
3Productivity
If SC-PTM is used for services concentrated in a single cell, then resource allocation efficiency is improved, but service coverage area is limited
Solution Approach 1:
The patent applies segmentation by dividing the service delivery into cell-specific segments based on user distribution. When users are concentrated in specific cells, the system segments the transmission to use SC-PTM only in those cells rather than broadcasting to the entire MBSFN area, thereby improving resource efficiency while maintaining coverage for the targeted user群体
Data Source
AI summary
A network selects a transmission mechanism for delivering a Point to Multipoint (PTM) compatible service based on cell identification (cell ID) information identifying the serving cells of user equipment (UE) devices interested in receiving the PTM compatible service. In some situations, the cell ID information is obtained by the network using a Multimedia Broadcast Multicast Service (MBMS) counting procedure where cell ID information is requested in a MBMS Counting Request Message and provided by each UE device in a MBMS Counting Response Message.