Base Station Assisted Peer Discovery Expression Aggregation
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Solution Overview
Problem
Existing wireless communication systems face challenges in efficient peer-to-peer (P2P) device discovery due to fast-decaying radio signals and operational differences in frequency bands, leading to excessive overhead in wide area networks during base station relayed peer discovery.
Innovation Solution
A method and apparatus for base station-assisted P2P discovery, where a wireless device generates an expression set with a temporal frequency and time duration, and transmits it to a base station for broadcasting, allowing efficient peer discovery across different frequency bands.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If base stations relay peer discovery information in a wide area network, then peer devices can discover each other across wide areas, but excessive overhead communications occur in the WAN
Solution Approach 1:
The peer discovery information is segmented into two parts: a static peer discovery identity (PDI) that remains unchanged, and a dynamic peer discovery information (PDI_info) that changes periodically. Only the dynamic part is transmitted periodically to base stations, while the static part is transmitted once. This segmentation reduces the amount of data that needs to be relayed across the WAN, thereby reducing overhead communications while maintaining wide area coverage capability.
Solution Approach 2:
The static peer discovery identity is transmitted and registered with the base station in advance before the periodic dynamic information transmission begins. This preliminary action allows the base station to have the static information ready for immediate relay, eliminating the need to retransmit it periodically. This preliminary registration reduces the ongoing message traffic volume in the WAN while maintaining continuous discovery capability.
2Reliability
If devices transmit peer discovery signals directly, then discovery can occur between nearby devices, but devices cannot detect each other's signals due to fast-decaying radio signals
Solution Approach 1:
Base stations serve as intermediary nodes between peer devices. Devices transmit their peer discovery information to serving base stations, which then relay this information to other base stations covering the target device's area. The target device can then discover the transmitting device through its serving base station without needing to directly detect the transmitting device's signal. This intermediary approach overcomes the limitation of fast-decaying radio signals and extends the effective discovery range while maintaining reliable discovery.
3Adaptability or versatility
If devices operate in different frequency bands, then devices can use optimal bands for their operations, but devices cannot detect each other's peer discovery signals
Solution Approach 1:
Base stations act as frequency band translators or mediators. A device operating in one frequency band transmits its peer discovery information to its serving base station, which then relays this information through the network to base stations serving devices in different frequency bands. This allows peer discovery across different frequency bands without requiring devices to transmit and receive in all possible bands, maintaining both frequency band flexibility and discovery reliability.
4Reliability
If peer discovery information is transmitted frequently to maintain privacy, then privacy is protected through rapid bit changes, but excessive overhead communications occur
Solution Approach 1:
The peer discovery information is divided into a static PDI (transmitted once) and a dynamic PDI_info (transmitted periodically). The dynamic part changes frequently to maintain privacy, while the static part remains unchanged. This segmentation allows the system to maintain privacy protection through rapid changes in the dynamic portion without requiring frequent retransmission of the entire peer discovery information, thereby reducing communication overhead in the WAN.
Solution Approach 2:
Instead of continuous or very frequent transmission of all peer discovery information, the system uses periodic transmission of only the dynamic PDI_info portion. This periodic action maintains privacy protection by updating the changing information at regular intervals while avoiding excessive overhead communications that would result from more frequent full-information transmissions.
Data Source
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AI summary
A method, an apparatus, and a computer program product for wireless communication are provided in which a UE is equipped to generate an expression associated with a wireless device for use in a peer discovery signal, generate an expression set from the expression, a first temporal frequency, and a first time duration, and transmit the generated expression set to a base station to allow the base station to broadcast each of the expressions included in the expression set at the first temporal frequency over the first time duration. Another method, apparatus, and computer program product for wireless communication are provided in which a base station is equipped to receive an expression set from a wireless device, process the received expression set to determine each of one or more instances of an expression, and transmit each of the one or more instances of the expression.