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1746 results about "Functional requirement" patented technology

In software engineering and systems engineering, a functional requirement defines a function of a system or its component, where a function is described as a specification of behavior between outputs and inputs.

Loading Control Methods And Apparatus For Wireless Access Points Of Wireless Local Area Networks In Support Of Legacy Terminals

Methods and apparatus for use in controlling the loading of wireless access points (APs) in a wireless local area network (WLAN) in support of legacy terminals are disclosed. The WLAN has at least a first AP and a second wireless AP adjacent the first wireless AP. An indication which indicates whether a loading of the second wireless AP is greater than a predetermined threshold is identified. When the indication indicates thai the loading is greater than the predetermined threshold, a first nominal radio frequency (RF) transmission power of the first wireless AP is increased in order to increase a first RF coverage area of the first wireless AP. A second nominal RF transmission power of the second wireless AP is correspondingly reduced in order to reduce a second RF coverage area of the second wireless AP. In response, some of the mobile communication devices initially operating with the second wireless AP are switched to operate with the first wireless AP in order to reduce the loading of the second wireless AP. The techniques may be embodied in a centralized approach where transmission control equipment of the WLAN controls each wireless APs in this manner, or alternatively in a distributed non-centralized approach where each wireless AP acts independently and autonomously in the same or similar manner. Preferably, the techniques do not require the functional requirements of mobile devices to modified and therefore are suitable for use with existing legacy devices.
Owner:MALIKIE INNOVATIONS LTD

Broadband wireless signal covering network based on passive optical network structure

The invention relates to a broadband wireless signal covering network based on a passive optical network structure. The network comprises a first fiber power divider / wave combiner, a plurality of user terminal units, an optical wavelength multiplexing / de-multiplexing device, a second fiber power divider / wave combiner and a broadband photoreceiver, wherein the first fiber power divider / wave combiner allocates light carrier signals of a light emitter to a plurality of fiber power dividers; a plurality of the user terminal units correspondingly receive the light carrier signals of the fiber power dividers, emit the light carrier signals to air and receive user uplink RF signals through antennas; the optical wavelength multiplexing / de-multiplexing device collects user uplink optical signals of a plurality of the user terminal units and transmits the signals to the uplink direction; the second fiber power divider / wave combiner collects the user uplink optical signals and transmits the signals to the uplink direction; and the broadband photoreceiver converts the received multi-wavelength user uplink optical signals into multi-bandwidth broadband RF signals and sends the signals to upper layer equipment. The broadband wireless signal covering network solves the problem of realizing broadband wireless communication for large-scale indoor multiuser, strengthens the adaptability to the horizontal dynamic change of uplink optical signal power and can adapt to the functional requirement of various wireless communication systems.
Owner:GUANGXUN SCI & TECH WUHAN

Multi-mode satellite navigation receiving radio frequency front end chip

InactiveCN101303403ASatisfied with bandpass filteringSatisfy InhibitionBeacon systems using radio wavesRF front endNavigation system
The invention provides a framing method of the receiver front-end of multimode satellite navigation, which discloses a frontend chip of the receiving RF of multimode satellite navigation which is applicable to a plurality of satellite navigation systems. The method of the invention comprises six modules which are a multimode PF frontend low-noise amplifier/ mixer group of monolithic integrated and completed type, a reconfigurable image rejection filter, a band-variable gain amplifier, an analog-to-digital converser, a configurable frequency synthesizer and a multimode control logic module. The reconfigurable module can realize the distribution of functional parameters according to the requirement through the multimode control logic management, causing the working performance to be optimized and meeting the functional requirement on the RF front end of the receiving platform of multimode satellite navigation. The framing method of the invention requires no external supporting accessories and has the advantages of being easy to carrying out cascade connection with preceding and backward stages, high gain, small noise coefficient and good integration. The invention is applied to the current communication and navigation positioning equipment for receiving multimode satellite navigation signals, has a wide application range and quite remarkable economic benefit, is largely on demand, supports the integration making use of multimode satellite navigation positioning information, improves positioning precision and has large social benefit.
Owner:杭州中科微电子有限公司

Power system energy efficiency public service cloud platform based on cloud computing

The invention relates to a power system energy efficiency public service cloud platform based on cloud computing. A three-layer framework is adopted in the energy efficiency public service cloud platform and comprises an energy efficiency service Iaas layer, an energy efficiency service Paas layer and an energy efficiency service application Saas layer. The energy efficiency service Iaas layer is an infrastructure level service layer and is used for providing virtual resources, mapped through the virtual technology, for a network, a server and database physical facilities in the cloud platform. The energy efficiency service Paas layer is a platform level service layer and used for providing the execution environment of cloud middleware resources, a distributed parallel platform and application service software for power consumers. The energy efficiency service application Saas layer is a software level service layer and used for providing software services of energy efficiency services based on Web access for users. According to the energy efficiency public service cloud platform, acquisition and monitoring of energy efficiency information and diagnosis and analysis of user energy efficiency parameters are achieved through the energy efficiency service application Saas layer. By means of the framework mode, management objects and function requirements can be quickly expanded and upgraded, and user energy management efficiency is improved.
Owner:XUJI GRP +3
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