Communication system, communication device and communication method, and computer program

A technology of a communication system and a communication device, which is applied in the field of communication systems, and can solve the problems of unavailability and difficulty in ensuring the bandwidth of the isochronous transmission mode reliably

Inactive Publication Date: 2009-10-14
SONY CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0034] Due to these factors, there is a problem in that it is difficult to reliably secure the bandwidth in the isochronous transfer mode
In this case, no mechanism is available for one device to prioritize the use of bandwidth over other devices to perform communications

Method used

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  • Communication system, communication device and communication method, and computer program
  • Communication system, communication device and communication method, and computer program
  • Communication system, communication device and communication method, and computer program

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Embodiment Construction

[0061] Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

[0062] The present invention relates to a WUSB communication system using multi-band OFDM UWB. WUSB adopts the physical layer and MAC layer designed by the WiMedia Alliance, and can use other upper layer applications in Wireless 1394, WiNet, etc. at the same time. In the WiMedia Alliance, the network is operated for every superframe with a predetermined period of time. Each superframe is also divided into 256 MASs, and upper layer applications reserve MASs to be used by themselves. The WUSB host reserves the required number of MASs and performs transaction scheduling for each WUSB device in the WUSB cluster.

[0063] figure 1A functional block diagram for performing communication management by using the MAS management table and the device information management table in the WUSB communication system is shown. Each functional block shown in th...

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PUM

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Abstract

Priority communication can be performed on a per device basis under a WUSB environment in which an isochronous transfer cannot be used. A WUSB host controls the band assignment of a MAS reserved in a superframe using a device information management table in which a device information entry is provided for each WUSB device, the device information entry including the MAS described in a bitmap formatand enabling a transaction to be executed. The WUSB host assigns at least a part of the reserved MAS to only a specific WUSB device. Only the WUSB device marked in the device information entry becomes an object for a transaction schedule.

Description

technical field [0001] The present invention relates to a communication system, a communication device, a communication method, and a computer program in which communication is performed between a "host" such as a PC and a "device" as a peripheral such as a printer via a USB interface. Specifically, the present invention relates to a communication system, a communication device, a communication method, and a computer program in which communication between a host and a device is performed using WUSB employing UWB (Ultra Wideband) application (a wireless technology using Ultra Wideband) And the multi-band OFDM method proposed by the Wimedia Alliance as the standard of the physical layer and the MAC layer is adopted. [0002] More specifically, the present invention relates to a communication system, a wireless communication device, a wireless communication method, and a computer program in which isochronous transfer having a higher priority than bulk transfer is implemented in W...

Claims

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Application Information

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Patent Type & AuthorityApplications(China)
IPC IPC(8): H04W28/26H04W72/12H04W74/04H04W74/06
CPCH04W72/0446H04W74/04
Inventor庵明宏
OwnerSONY CORP