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Distributed Scheduling Of Quiet-period For In-service Channel Monitoring

A silent period, equipment technology, applied in network planning, digital transmission systems, electrical components, etc., can solve problems such as exacerbation and implementation difficulties, and achieve the best efficiency.

Active Publication Date: 2014-10-22
KONINK PHILIPS ELECTRONICS NV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] periodic scheduling and on-demand scheduling are fairly easy to implement on networks operating with centralized control, but are significantly more difficult to implement on networks with distributed control
This difficulty is further exacerbated in networks spanning multiple hop distances because not all devices will communicate directly with each other

Method used

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  • Distributed Scheduling Of Quiet-period For In-service Channel Monitoring
  • Distributed Scheduling Of Quiet-period For In-service Channel Monitoring

Examples

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Embodiment Construction

[0012] In the following description, for purposes of explanation and not limitation, specific details are set forth, such as specific architectures, interfaces, techniques, etc., in order to provide a thorough understanding of the present invention. It will be apparent, however, to one skilled in the art that the present invention may be practiced in other embodiments that depart from these specific details. For the purpose of clarity, detailed descriptions of well-known devices, circuits, and methods are omitted so as not to obscure the description of the present invention with unnecessary detail.

[0013] As noted above, the present invention is directed to devices and networks that are dynamically relocatable between various possible channels. In a typical embodiment, the possible channels are those normally allocated or licensed to primary users such as television broadcasters, but the actual occupancy of each channel varies. For example, due to the possibility of interfe...

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Abstract

In a distributed-control cognitive radio network, each secondary user (200) in a network broadcasts parameters (125) that indicate the minimum quiet-period sensing demand for regular quiet-periods that the device requires for reliable detection of a primary user (290). Each device (200) in the network adjusts its quiet-period sensing rate to accommodate the highest minimum sensing demand (155, 160), thereby providing optimal efficiency relative to quiet-period support while assuring that all devices (200) in the network are provided at least their minimum quiet-period sensing demand (150). Both the interval between regular quiet-periods and the duration of these quiet-periods are negotiated among the devices on the network (155). A quiet-period index (140) is used to synchronize all of the devices to a common time base. Techniques are also provided for efficient coordination of on-demand quiet-period requests, and for supporting different quiet-period schedules for multiple classes of primary users.

Description

technical field [0001] The present invention relates to the field of cognitive radio communications, and in particular to methods and systems for scheduling (scheduling) quiet-periods among distributed users to facilitate channel monitoring. Background technique [0002] Cognitive radio is a communication scheme in which devices monitor licensed channels for activity and only establish communications on inactive channels. This is a particularly viable solution for providing unused communication bandwidth to local area communication networks, such as allowing local (home) networks to operate on unused television broadcast channels. Such local networks are commonly used to allow devices and electrical appliances within the home to communicate and interact with each other, generally following direct or pre-programmed instructions from the user. Such communications can range from user instructions to preheat an oven to the exchange of audio / visual information between cameras, v...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W16/14H04W72/54
CPCH04L12/2602H04W72/1231H04L43/00H04W16/14H04W72/542H04W72/54
Inventor J.王K.S.查拉帕利D.A.T.卡瓦尔坎蒂
Owner KONINK PHILIPS ELECTRONICS NV