Data communication interface and communication devices incorporating same

a data communication interface and communication device technology, applied in the field of data communication interfaces, can solve the problems of single host for a wusb, less than optimal use of device resources in many instances,

Inactive Publication Date: 2007-12-20
HONG KONG APPLIED SCI & TECH RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0014]According to a preferred embodiment of the present invention, the controller is adapted to cause said host detection means to detect for a second active host for data communication with said host communication means when said communication interface is already in data connection with a first active host.

Problems solved by technology

An important constraint of conventional WUSB applications is the limitation that there can be only a single host for a WUSB system at a specific time.
Such a constraint in a conventional WUSB system means that no more than one host connections can be supported by one device simultaneously and this would mean a less-than-optimum utilisation of device resources in many instances.

Method used

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  • Data communication interface and communication devices incorporating same
  • Data communication interface and communication devices incorporating same
  • Data communication interface and communication devices incorporating same

Examples

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Embodiment Construction

[0039]In FIG. 1, there is shown an exemplary WUSB system 10 comprising a WUSB device server or device function unit server 100 of this invention, a plurality of active WUSB hosts 201, 202, 203 which are denoted also as Hosts A, B and C respectively, and a WUSB device function including a device endpoint or a device endpoint function unit 300. The WUSB device function unit can be, for example, printer, data storage units, control units such as keyboards and mouse, microphone, display units such as projectors, or other WUSB device function units known from time to time. The apparatus 100 will be referred to as WUSB device server for brevity in this specification. The system 10 is connected so that the device function unit 300 can serve the 3 active WUSB hosts simultaneously. The three wireless USB hosts 201-203 are connected to the WUSB device server 100 by means of WUSB protocol. WUSB protocols are more particularly described in “Wireless Universal Serial Bus Specification” revision ...

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Abstract

A communication interface facilitates connection of a plurality of wireless USB compatible hosts with at least a WUSB device in a wireless USB environment at the same time. The communication interface includes a host detector that detects the presence of an active host or a plurality of active hosts, a host communicator for establishing wireless USB connection with a plurality of hosts, and a controller for causing time division multiplexed (TDM) data communication between active hosts and at least one device.

Description

FIELD OF THE INVENTION[0001]The present invention relates to data communication interface and, more particularly, to data communication interface for WUSB applications and communication devices incorporating same.BACKGROUND OF THE INVENTION[0002]Wireless USB (WUSB) is a logical evolution of USB and has become an important standard for many applications because of its various advantages, including flexibility in deployment. The physical layer (“PHY”) of WUSB is described in the Multiband OFDM Aliance (MBOA) UWB PHY specification-“Multiband OFDM Physical Layer Specification” (Revision 1.) Jan. 14, 2005, WiMedia Alliance, which is incorporated herein by reference. PHY currently supports data rates of 53.3, 80, 106.7, 160, 200, 320, 400 and 480 Mb / s and multiple channels. PHY also provides error detection and correction schemes to provide a robust communication channel. Logically, WUSB is a polled, TDMA based protocol, similar to wired USB. In a WUSB system, the host initiates all data ...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): G06F13/20
CPCH04L12/66
Inventor CHAN, MAN CHITANG, CHI FAI JACKDING, QUAN LONG
Owner HONG KONG APPLIED SCI & TECH RES INST
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