PTM Transmission Scheduling with Network Delay Compensation
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Solution Overview
Problem
Current point-to-multipoint (PTM) transmission systems in mobile networks face challenges in precisely scheduling content data delivery, leading to inefficient battery usage in mobile terminals due to inconsistent and imprecise wake-up times, as the existing solutions fail to account for varying system delays across different network nodes.
Innovation Solution
A method is introduced where a content provider node specifies delivery schedule information indicating the time at which content data is to be receivable by mobile terminals, and this information is used by PTM transmission control nodes to determine a transmission start time based on system delay parameters, ensuring that content data is transmitted at the right time across the network, even to the most remote nodes, thereby synchronizing delivery across all terminals.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If PTM transmission scheduling does not account for system delays, then the transmission can start immediately, but the content data will not be delivered simultaneously to all mobile terminals
Solution Approach 1:
The PTM transmission control node calculates and applies a time offset in advance before the scheduled delivery time. This preliminary action ensures that the transmission starts early enough to compensate for processing delays at network nodes and propagation delays, so that all mobile terminals receive the content data simultaneously at the scheduled delivery time regardless of their location.
2Reliability
If mobile terminals wake up continuously to check for content data, then they can receive data immediately, but battery drain increases
Solution Approach 1:
The system provides accurate delivery schedule information to mobile terminals, including the precise scheduled delivery time and the calculated time offset. This feedback allows terminals to wake up only at the correct time to receive content data, rather than continuously monitoring, thereby reducing battery drain while maintaining reliable data reception.
3Speed
If the transmission start time is set to the scheduled delivery time, then the schedule is simple, but remote mobile terminals cannot receive data on time due to propagation delay
Solution Approach 1:
The system changes the transmission start time parameter by introducing a time offset that is calculated based on the scheduled delivery time and network-specific delay parameters. This parameter adjustment ensures that the transmission starts early enough to account for processing and propagation delays, allowing remote mobile terminals to receive data simultaneously at the scheduled delivery time.
Data Source
AI summary
The present disclosure relates to a technique for scheduling a point-to-multipoint (PTM) transmission of content data, provided by a content provider node, to a plurality of mobile terminals in a PTM-enabled network. A method embodiment comprises the steps of: receiving, by a PTM transmission control node, delivery schedule information from the content provider node, the delivery schedule information indicating a delivery time at which at least a portion of the content data is to be receivable by the plurality of mobile terminals; and determining, by the PTM transmission control node, a transmission start time for starting the transmission of the content data to one or more of the plurality of mobile terminals located in a service area of the PTM transmission control node, wherein the transmission start time is determined based on the delivery time and one or more system delay parameters.