E-MBMS Indicator Scheduling for Group Communication Latency
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Solution Overview
Problem
Conventional multicast channels in cellular communication systems have high setup times, which hinder system performance for group communication services requiring low latency and quick establishment, especially when dealing with large groups.
Innovation Solution
Implementing a schedule for an indicator on a broadcast/multicast medium to identify data location and availability, binding it with application layer paging and power saving mechanisms, allowing devices to efficiently wake up, monitor, and tune into multicast media only when available, and return to sleep mode when not, thereby optimizing resource usage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If conventional multicast channels are used for group communication, then broadcast/multicast services can be provided to multiple users, but the setup time is long which deteriorates system performance for low latency requirements
Solution Approach 1:
The patent applies preliminary action by pre-configuring multicast channel parameters and indicators before actual group communication begins. The system pre-establishes channel schedules, identifies available multicast media in advance, and prepares wake-up mechanisms so that when group communication is needed, devices can quickly transition to receiving data without lengthy setup procedures.
Solution Approach 2:
The patent implements dynamics by making the multicast channel configuration adaptive and flexible. The system dynamically adjusts channel parameters based on real-time availability of multicast media, allowing devices to wake up and tune in only when data is actually available rather than maintaining continuous or pre-configured connections, thus reducing setup time and improving responsiveness.
2Speed
If devices continuously monitor multicast channels for data availability, then fast response to available data is achieved, but power consumption increases
Solution Approach 1:
The patent applies periodic action by implementing cyclic wake-up schedules where devices wake up at predetermined intervals to check for available multicast data, then return to sleep mode. This periodic monitoring mechanism ensures devices respond promptly to available data while minimizing power consumption by keeping devices in low-power sleep states between monitoring cycles, rather than requiring continuous active monitoring.
3Loss of time
If devices wake up continuously to check for multicast data, then data availability is quickly detected, but bandwidth usage and power consumption increase
Solution Approach 1:
The patent implements feedback mechanisms where the network side provides indication information about available multicast data to devices in advance. This feedback allows devices to wake up at optimal times when data is actually available, reducing unnecessary wake-ups and bandwidth usage while maintaining fast data detection. The feedback loop between network and device coordinates wake-up timing with actual data availability, minimizing energy waste.
Data Source
AI summary
The disclosure is directed to group communications over evolved multimedia broadcast/multicast services (E-MBMS). An embodiment identifies a schedule for an indicator on a broadcast/multicast medium of a first multicast media on a multicast flow, wherein the indicator is configured to identify a location of data on the broadcast/multicast medium and to identify a presence of the data on the multicast flow, binds application layer paging, an application layer wake up mechanism, or a power saving mechanism to the schedule for the indicator on the multicast flow, wakes from a sleep mode to monitor the indicator to determine availability of the first multicast media based on the indicator, tunes to the first multicast media if the first multicast media is available, and returns to the sleep mode, if the first multicast media is not available.