Cognitive Peer-to-Peer Device Identification and Relay
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Solution Overview
Problem
Existing wireless communication systems face challenges in identifying and facilitating peer-to-peer communication between devices, particularly in shared frequency spectra, without interfering with primary users and efficiently utilizing available transmission power.
Innovation Solution
A cognitive peer-to-peer device listens to downlink assignments from an access point, identifies neighboring devices based on uplink transmissions, and communicates directly with them using a portion of the transmission power while re-transmitting uplink signals to the access point, thereby acting as a relay and mitigating interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a cognitive peer-to-peer device communicates directly with identified devices using transmission power, then peer-to-peer communication efficiency is improved, but interference with primary user communications increases
Solution Approach 1:
The cognitive peer-to-peer device performs preliminary identification of neighboring devices by monitoring downlink assignments and uplink transmissions before initiating direct communication. This allows the device to establish peer-to-peer connections in advance, enabling efficient direct communication while being aware of the communication environment to avoid interfering with primary users.
Solution Approach 2:
The cognitive peer-to-peer device dynamically adjusts transmission power parameters based on the communication environment. By monitoring the shared frequency spectrum and detecting primary user activities, the device modifies its transmission power level to maintain efficient peer-to-peer communication while minimizing interference to primary users.
2Productivity
If a cognitive peer-to-peer device acts as a relay to re-transmit uplink signals, then network capacity is enhanced, but transmission power consumption increases
Solution Approach 1:
The cognitive peer-to-peer device performs partial relaying by re-transmitting only specific uplink signals that benefit from relay assistance, rather than all signals. By selectively relaying signals based on channel conditions and network needs, the device enhances network capacity for critical communications while consuming transmission power only when necessary, optimizing the balance between network capacity enhancement and power consumption.
3Measurement precision
If a cognitive peer-to-peer device monitors downlink assignments to identify neighboring devices, then device identification accuracy is improved, but time for establishing communication increases
Solution Approach 1:
The cognitive peer-to-peer device continuously monitors downlink assignments and uplink transmissions in the shared frequency spectrum, maintaining an updated list of identified neighboring devices. This continuous monitoring allows the device to quickly establish peer-to-peer communication when needed, as identification information is already available, thereby reducing the time required to establish communication while maintaining high identification accuracy.
Data Source
AI summary
Systems and methodologies are described that facilitate identifying devices in a wireless network and cognitively communicating with devices over utilized frequencies. Devices can be identified by receiving downlink resource assignments related to the devices, evaluating uplink transmissions thereover, and identifying the devices from one or more aspects of the uplink transmissions (e.g., an identifier in the transmission). Moreover, the uplink transmissions can be re-transmitted to a serving device to provide relay functionality for the transmissions. Additionally, peer-to-peer communication with the device and/or other devices can be facilitated by using a portion of available transmission power to re-transmit while using the other portion to transmit peer-to-peer communications. Thus, interference caused by the peer-to-peer communications is mitigated by additionally functioning as a relay using a portion of the transmit power.