Mobile Device Cluster Set Formation for Wireless Signal Reliability
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Solution Overview
Problem
In wireless communications, controller nodes face challenges in identifying and coordinating a cluster set of mobile devices for implementing spatial diversity, as they lack information about the channel quality and availability of mobile devices, which affects the success of message transmission and increases interference.
Innovation Solution
A controller node identifies a primary mobile device with a scheduled transmission and selects eligible assistant mobile devices based on channel quality indicators, directing them to retransmit the scheduled transmission to enhance signal reception and reduce interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If controller nodes attempt to identify and coordinate cluster sets of mobile devices for spatial diversity, then signal reception quality improves, but the controller nodes lack necessary information about channel quality and device availability
Solution Approach 1:
The patent introduces mobile devices as intermediaries that measure channel quality indicators (CQIs) between themselves and other mobile devices, then report these measurements to the controller node. This intermediary approach allows the controller to obtain necessary channel quality information without directly measuring it, resolving the information gap while enabling reliable cluster set formation for spatial diversity
2Reliability
If mobile devices are coordinated to retransmit messages for spatial diversity, then communication reliability improves, but device complexity and coordination overhead increase
Solution Approach 1:
The patent enables mobile devices to autonomously determine their eligibility for cluster set participation by evaluating their own channel conditions and availability status. Devices self-report their suitability metrics to the controller, which then automatically forms cluster sets without requiring complex centralized coordination or manual configuration, thereby reducing overall system complexity while maintaining high reliability
3Productivity
If eligible assistant mobile devices are selected and directed to retransmit scheduled transmissions, then throughput improves, but interference with neighboring controller nodes may increase
Solution Approach 1:
The patent applies local quality by having mobile devices transmit retransmitted signals with adjusted power levels or directional beamforming tailored to their specific local channel conditions and geographic location. This localized adaptation allows eligible assistant devices to contribute to throughput improvement while minimizing their interference impact on neighboring controller nodes through spatially-aware transmission parameters
Data Source
AI summary
Mechanisms for determining a cluster set of mobile devices are disclosed. A controller node identifies a primary mobile device that has a scheduled transmission for the controller node at a first time. The controller node identifies, from a plurality of mobile devices, a set of eligible assistant (EA) mobile devices. Each EA mobile device in the set is directed to determine a corresponding mobile device-to-mobile device (MD-MD) channel indicator that identifies a quality of a channel between the each EA mobile device and the primary mobile device. The controller node receives from at least one EA mobile device in the set the corresponding MD-MD channel indicator. The controller node then determines a cluster set that includes the primary mobile device and the at least one EA mobile device.