Multicast Base Station Queue State Estimation for Uplink Resource Optimization
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Solution Overview
Problem
In multicasting modes like eMBMS, there is no effective solution for adjusting resource allocation based on the playback buffer state of user equipment (UEs), leading to potential playback interruptions, resource wastage, and inefficient uplink resource consumption due to random fluctuations in communication channels.
Innovation Solution
A method where UEs transmit queue state information (QSI) to a base station in a time division manner, allowing the base station to estimate and adjust resources allocated to other UEs based on received QSI, thereby optimizing resource usage and preventing playback interruptions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If all UEs transmit QSI simultaneously in multicasting mode, then the base station can obtain complete queue state information for resource allocation, but uplink resource consumption increases significantly
Solution Approach 1:
The patent segments the QSI transmission process by having different UEs transmit their queue state information in different time slots rather than simultaneously. This time-division approach divides the uplink resource usage among multiple UEs, reducing the peak resource consumption while ensuring the base station receives QSI from all UEs for accurate resource allocation.
Solution Approach 2:
The patent implements periodic QSI transmission where UEs send their queue state information at regular intervals in a time-division manner. This periodic action allows the base station to maintain updated knowledge of UE buffer states for resource allocation while spreading the uplink resource consumption over time rather than concentrating it in simultaneous transmissions.
2Reliability
If video playback bit rate is increased to provide higher quality streaming, then user experience improves, but playback buffer runs empty easily causing playback interruptions
Solution Approach 1:
The patent establishes a feedback mechanism where UEs periodically transmit their queue state information (buffer status) to the base station. The base station uses this feedback to dynamically adjust the video data stream rate and volume, ensuring the playback bit rate matches the buffer capacity and network conditions, thereby preventing buffer underflow and playback interruptions while maintaining optimal video quality.
Solution Approach 2:
The patent enables dynamic adjustment of video streaming parameters based on real-time buffer state feedback. The system transitions from static bit rate allocation to dynamic rate adaptation, where the video data stream rate and volume are continuously adjusted according to the UE's playback buffer state, allowing high quality streaming while preventing buffer exhaustion.
3Reliability
If resource allocation is adjusted according to individual UE buffer states in unicasting mode, then playback quality improves, but device complexity and control overhead increase
Solution Approach 1:
The patent applies a universal resource allocation mechanism in multicasting mode where the base station adjusts the video data stream rate and volume parameters for all UEs based on aggregated queue state information. This multi-functional approach allows the system to maintain individualized buffer management benefits while using a standardized control procedure, reducing the complexity compared to fully individualized unicasting control.
Solution Approach 2:
The patent uses the queue state information from transmitting UEs as a reference to estimate and infer the buffer states of other UEs in the multicast group. This copying approach allows the base station to allocate resources for multiple UEs based on representative feedback, reducing the control overhead and complexity while maintaining playback quality through informed resource allocation decisions.
4Measurement precision
If queue state information from all UEs is collected in real-time, then resource allocation accuracy improves, but uplink resource consumption and network overhead increase
Solution Approach 1:
The patent segments the QSI collection process across different time slots for different UEs rather than requiring simultaneous real-time transmission from all UEs. This segmentation maintains measurement precision by ensuring all UEs' buffer states are captured while distributing the uplink resource consumption over time, reducing the peak network overhead and energy consumption.
Solution Approach 2:
The patent introduces an estimation mechanism where the base station uses QSI from transmitting UEs as an intermediary to infer the buffer states of other UEs. This intermediary approach reduces the need for direct real-time QSI transmission from every UE, thereby reducing uplink resource consumption and network overhead while maintaining sufficient measurement precision for effective resource allocation through statistical inference.
Data Source
AI summary
A method, base station and user equipment for multicasting and a device with a storage capability are disclosed in the present disclosure. The method for multicasting includes the following steps of: receiving, by a base station, queue state information transmitted in a time division manner by different user equipments (UEs) in a multicast group; and estimating queue state information of at least another part of UEs in the multicast group according to the received queue state information of the UEs. In this way, the present disclosure can enable the resource allocated to each of the UEs by the base station to match the queue state information of the UE, thereby avoiding the waste of resources without influencing the play effect.