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Distributed device-to-device synchronization

A technology of equipment and synchronous phase, applied in the direction of synchronous device, wireless communication, electrical components, etc., can solve the problem of unable to receive synchronous signal and so on

Active Publication Date: 2019-09-13
QUALCOMM INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As a result, even if these mobile devices move within range of synchronization signals with reliable network timing, they will not be able to receive any further synchronization signals on these occupied resources

Method used

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  • Distributed device-to-device synchronization
  • Distributed device-to-device synchronization
  • Distributed device-to-device synchronization

Examples

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Embodiment Construction

[0022] Device-to-device synchronization in a wireless communication system is described. When mobile devices and / or clusters of mobile devices become isolated from network synchronization signals, mobile devices may need an agent to become aware of the presence of reliable timing signals. By using reliability alerts on specific resources allocated for reliability alerts, a mobile device can detect when a reliable timing signal is present even if the rest of the mobile device's D2D resources are occupied by communications with other mobile devices. Once a reliability alert is detected, the mobile device may release D2D resources to enable reception of synchronization signals on the resources. Before the mobile device is synchronized and / or when it attempts to synchronize, the mobile device can start sending its own reliability alerts for a certain number of synchronization periods, depending on the transmission probability. If the mobile device is able to receive synchronizati...

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Abstract

Methods, systems and devices for providing D2D synchronization are described. The methods, systems and / or devices may include tools and techniques for providing synchronization of mobile devices based on the detection of reliability alerts. Reliability alerts may be used between mobile devices, which may be sent and / or received on specific D2D resources. A mobile device that was previously isolated from network synchronization will be able to receive a reliability alert because resources are reserved for reliability alerts: reliable sync signals are close when the mobile device moves within range of a reliable device. Once the reliability alert is received, the mobile device can release other resources to allow the mobile device to receive synchronization signals from the reliable device. The mobile device can then synchronize with the network based on the received synchronization signal and send its own reliability alert for subsequent quarantined devices.

Description

[0001] cross reference [0002] This patent application claims priority to U.S. Patent Application No. 14 / 286,354, filed May 23, 2014, by Abedini et al., entitled "DistributedDevice-to-Device Synchronization," which is assigned to this application the assignee. technical field [0003] Broadly speaking, the following relates to wireless communication and, more specifically, to device-to-device (D2D) synchronization. Background technique [0004] Wireless communication systems are widely deployed to provide various types of communication content such as voice, video, packet data, messaging, broadcast, and so on. These systems may be multiple-access systems capable of supporting communication with multiple users by sharing available system resources (eg, time, frequency, and power). Examples of such multiple-access systems include Code Division Multiple Access (CDMA) systems, Time Division Multiple Access (TDMA) systems, Frequency Division Multiple Access (FDMA) systems, and...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04W56/00H04W72/02
CPCH04W56/001H04W56/0015H04W72/02H04W72/04
Inventor N·阿贝迪尼N·N·胡德S·R·塔维尔达尔S·亨利厉隽怿V·D·帕克
Owner QUALCOMM INC
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