MBMS Transport Channel Allocation via Power Cost Optimization
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current MBMS transport channel allocation methods, such as the Counting Mechanism, fail to efficiently manage radio resources due to their inability to accurately account for complex wireless environments and user service profiles, leading to inefficient power usage and potential service quality issues.
Innovation Solution
A method that considers the required service rate and location factor of User Equipments (UEs) to determine the power cost of different transport channels (FACH, DCH, and HS-DSCH) and selects the channel with the minimum power cost for MBMS service provision, allowing for adaptive allocation of transport channels based on dynamic conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a static switching point based on the number of counted MBMS users is used to determine PTP or PTM mode, then the implementation is simple, but the radio resource allocation efficiency is poor and significant power resources are wasted
Solution Approach 1:
The patent transforms the static switching point mechanism into a dynamic one by continuously monitoring multiple parameters including received signal code power (RSCP), signal-to-interference ratio (SIR), and buffer status. The transport channel selection adapts in real-time based on changing channel conditions and service requirements, allowing the system to optimize resource allocation dynamically rather than relying on fixed thresholds.
Solution Approach 2:
The patent changes the decision parameters from a single parameter (number of users) to multiple parameters (RSCP, SIR, buffer status, service rate requirements). By considering these varying parameters, the system can make more informed decisions about transport channel selection, matching the channel type to both the number of users and the quality of channel conditions.
2Ease of operation
If the Counting Mechanism is used to determine transport channel allocation, then the decision process is simple, but the power resource usage is inefficient
Solution Approach 1:
The patent implements feedback mechanisms by continuously monitoring channel quality indicators (RSCP, SIR) and service requirements, then using this feedback to adjust transport channel selection. The system receives feedback about actual channel conditions and user distribution, and adapts its decisions accordingly, creating a closed-loop control system that optimizes power usage based on real-time conditions.
Solution Approach 2:
The system transitions from static counting-based decisions to dynamic parameter-based decisions that adapt to changing conditions. By continuously evaluating multiple parameters and adjusting transport channel selection in real-time, the system optimizes power resource allocation according to actual channel conditions and service requirements rather than relying on predetermined thresholds.
3Device complexity
If a single parameter (number of UEs) is used for transport channel selection, then the abstraction is simple, but the accuracy of representing complex wireless environment and user service profiles is insufficient
Solution Approach 1:
The patent adds multiple dimensions to the decision-making process by introducing spatial dimensions (user distribution across cell locations), quality dimensions (RSCP, SIR measurements), and service dimensions (buffer status, rate requirements). This multi-dimensional approach provides a comprehensive view of the wireless environment and user needs, far surpassing the single-dimensional user count approach.
Solution Approach 2:
The patent segments the decision-making process into multiple independent parameter evaluations (RSCP evaluation, SIR evaluation, buffer status evaluation, service rate matching) rather than relying on a single aggregated metric. Each parameter is evaluated separately and collectively informs the transport channel selection, allowing for more precise and nuanced decisions.
Data Source
Figure 1~2
Figure 3~4
Figure 5
AI summary
The present invention relates to a method, a radio network controller and a wireless communication system for allocating transport channels to provide Multimedia Broadcast Multicast Service MBMS services to one or more User Equipments UEs in a cell of a wireless network, comprising: obtaining parameters including a rate required by a MBMS service and a location factor indicating location of a UE in the cell, determining power cost of providing the MBMS service to the UE for each of types of transport channels available in the cell based on at least the required service rate and the location factor, and selecting a type of transport channel that has a minimum power cost to provide the MBMS service to the UE. This improves the efficiency of power usage, overall cell throughput and service quality.