Power-Efficient Peer Group Discovery for Wireless Multicast
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Solution Overview
Problem
Current wireless communication systems face inefficiencies in multicast transmissions due to the lack of centralized coordination in ad hoc device-to-device communications, leading to wasted radio resources and battery life issues as devices are not always awake to receive or transmit control signaling, resulting in futile multicast transmissions and power inefficiency.
Innovation Solution
Implementing a power-efficient peer group discovery method using a discovery channel where devices periodically wake to monitor and exchange discovery messages, allowing senders and receivers to confirm availability and initiate multicast sessions without constant wakefulness, utilizing expressions based on multicast group identifiers to coordinate transmissions and receptions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If devices continuously monitor for multicast transmissions, then reception reliability is improved, but power consumption increases
Solution Approach 1:
The patent implements periodic wake-up cycles where devices alternate between sleeping and waking to check for multicast transmissions. Each device wakes periodically to monitor for multicast group identifiers, then returns to sleep mode. This periodic action allows devices to maintain reception capability while dramatically reducing average power consumption compared to continuous monitoring.
2Reliability
If devices wake frequently to check for multicast transmissions, then transmission reliability is improved, but battery life decreases
Solution Approach 1:
Devices implement periodic wake-up cycles with optimized intervals that balance reliability needs against battery conservation. The wake-up frequency is tuned to detect multicast transmissions reliably while minimizing the duration devices spend in active state, thereby extending battery life.
Solution Approach 2:
The system performs preliminary actions by having devices wake up and check for multicast group identifiers before full data transmission begins. This preliminary check allows devices to determine whether to fully activate their receivers, avoiding unnecessary power consumption when no multicast traffic is present while maintaining reliability when traffic does occur.
3Loss of energy
If centralized coordination is used for multicast, then resource efficiency is improved, but system complexity increases
Solution Approach 1:
The patent enables devices to perform self-service by autonomously detecting multicast group identifiers and managing their own wake-up cycles without requiring centralized coordination. Each device independently monitors for multicast traffic and manages its power state, eliminating the need for complex centralized control systems while improving radio resource efficiency through self-organized operation.
Data Source
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AI summary
A method, an apparatus, and a computer program product for wireless communication are provided. The apparatus may be a data source determining to send a multicast transmission for a multicast group having a multicast group identifier, wirelessly communicating an expression with at least one node in the multicast group, the expression based on the multicast group identifier, and sending the multicast transmission to the at least one node. The apparatus may a data receiver determining to receive a multicast transmission for a multicast group having a multicast group identifier, wirelessly communicating an expression with a data source in the multicast group, the expression based on the multicast group identifier, and receiving the multicast transmission from the data source.