38results about How to "Protect Existing Investments" patented technology

The invention discloses a system for achieving network backward compatibility, which comprises a policy and charging rule function entity PCRF, a home subscriber server HSS, an evolved mobile switch center EMSC and an evolved media gateway EMGW. The invention also discloses an adhesion method, which comprises the following steps: transmitting an adhesion request message by a UE to a target MME, and transmitting an updated position confirmation message to the target MME by the HHS after the target MME executes authorization and position updating according to the service state of the UE; acquiring the address information of a target eMSC by the UE, and initially adhering on the target eMSC; and updating a tracking region and the position of the UE if the MME and the eMSC for providing the service change, and reattaching to a new target MME and a new eMSC. The invention also discloses a de-adhesion method. According to the invention, circuit domain service can be continuously used in an evolved network, and backward compatibility can be achieved, thereby maximally utilizing entities in the conventional circuit domain, ensuring smooth transition of system upgrading and protecting the present investment of operators.

The invention relates to an industrial wireless communication method based on IEEE802.15.4, comprising the following steps: building various devices in the industrial wireless network into web-and-star-shaped mixed topological structure; establishing an industrial wireless communication protocol stack model based on the IEEE802.15.4; defining a superframe structure based on the IEEE802.15.4 based on the topological structure and the protocol stack model; defining a frame structure based on the protocol stack model; realizing industrial wireless communication process based on the protocol model, the superframe structure and the frame structure. In the method of the invention, the web-and-star-shaped mixed topological structure is adopted, and the star-shaped structure simplifies network structure, reduces maintenance and management difficulty and improves system flexibility; the web structure is adopted to improve network reliability; the advantages of the IEEE802.15.4 are fully made use of to improve system compatibility, protect existing investment and meet industrial application requirements by expansion.

The invention relates to a clustering-wireless-sensor-network-orientated two-stage adaptive frequency-hopping method. The method comprises the following steps of: constructing the clustering wireless sensor network; defining a super-frame structure based on institute of electrical and electronic engineer (IEEE) 802.15.4 according to the topological structure of the clustering wireless sensor network; accessing a format of a beacon frame of a control layer based on a medium of the original IEEE 802.15.4, and extending a content of a beacon frame load; and accessing the beacon frame of the control layer based on the super-frame structure and the extended medium of the IEEE 802.15.4 so as to realize a two-stage adaptive frequency-hopping process of a node in the network. By the clustering wireless sensor network, the network size is expanded, the difficulty in maintenance and management is lowered, and the system flexibility is improved; as the two-stage frequency-hopping method is designed, the compatibility with the IEEE 802.15.4 and the system reliability are guaranteed; and based on the beacon frame load of the IEEE 802.15.4, no special frame is not needed to be designed for a broadcast channel distribution result during a channel switching process, so that the network design is simplified, the number of the frames for controlling is reduced, and the network throughput is increased.

A service system of stream media based on controllable P2P technique comprises bureau center, sub center, client end and network connected with three said units on sense of space or service providing layer, service support layer and network transmission layer on sense of logical function. Its realizing method utilizes dispatch server to control P2 P transmission between client ends according to control policy.

The invention provides a cognitive wireless communication system for an electric system, and a MAC protocol realization method for the electric system. The system includes a main base station, a cognitive base station, a spectrum negotiation terminal, an authorized user and a cognitive user; the main base station and the cognitive base station respectively manages the authorized user and the cognitive user; the main base station and the cognitive base station carry out information interaction; and the cognitive base station and the spectrum negotiation terminal carry out the information interaction. The MAC protocol realization method provides a more scientific spectrum resource allocation method on basis of urgency and fairness based, and also a multi-parameter frequency switching method on basis of a weighting. The cognitive wireless communication system of the invention reduces the spectrum sensing time and improves the sensing efficiency, so that the radio frequency utilization efficiency is increased; the communication anti-interference capacity of the electric wireless terminal is improved; the more scientific spectrum resource allocation is realized; the rational resource sharing is ensured; the more comprehensive and integrated frequency switching is achieved; the smooth transition of switching is ensured; and the switching performance impact is reduced.

The embodiment of the invention provides service transport system, equipment and method. The service transport system comprises the service transport equipment and a packet switching core, wherein the service transport equipment is used for receiving an SDH (Synchronous Digital Hierarchy) line signal from access layer equipment of a TDM (Time Division Multiplexing) switching network, converting the SDH line signal into TDM service, separating the TDM service into EOS (End of Signaling) service and non-EOS service, then converting the EOS service into packet service corresponding to the packet switching core and sending the packet service to the packet switching core; and the packet switching core is used for receiving the packet service and sending the packet service to convergence layer equipment of a packet switching network. The embodiment of the invention realizes the communication of the pocket service between the packet switching network and the TDM switching network without modifying the access layer equipment, thereby saving the cost.

The invention relates to the field of wireless communication, and discloses a method and a device for collocating and selecting a transmission frequency band. In the method and the device, a total system bandwidth is firstly marked off a main transmission frequency band as a transmission bandwidth keeping compatible with the prior system, other frequency bands positioned in the total system bandwidth beyond the main transmission frequency band have no fixed bandwidth division, but other transmission frequency bands beyond the main transmission frequency band are gradually distributed as auxiliary transmission frequency bands according to the running condition of the system and the requirement. The variable auxiliary transmission frequency bands enable the system to adapt to the requirement of service change more flexibly.

The invention relates to the industrial wireless network technology, in particular to a factory automation wireless network time synchronizing method based on time division multiple address (TDMA). The factory automation wireless network time synchronizing method is based on the institute of electrical and electronic engineers (IEEE) 802.11 standard and the TDMA mechanism, by adopting a hardware timestamp printing method and calculating the timestamp values of a receiving side and a dispatching side, time deviation caused by processing delay of a protocol stack, delay from a physical layer interface to a wireless media interface (antenna) and delay of information transmission in the air can be eliminated, and accurate time synchronization of a factory automation wireless network can be achieved. On the basis that no additional expenses can be caused, the factory automation wireless network time synchronizing method remarkably improves the time synchronization accuracy of the factory automatic wireless network based on the IEEE 802.11 single-hop network, meets severe requirements on transmission speed, reliability, instantaneity and network scale of the factory automatic network and achieves the aims of being high in synchronizing accuracy, high in efficiency, low in expense, easy to achieve and the like.

The invention provides a power line inspection system and belongs to the technical field of power inspection. Aiming at solving the technical problems, the invention provides the power line inspection system capable of effectively reducing the working amount of workers and improving the working efficiency. With the adoption of the technical scheme, the power line inspection system comprises a management console and a plurality of handholding type power inspection mobile terminals; each handholding type power inspection mobile terminal is communicated with the management console through a network communication module; each handholding type power inspection mobile terminal comprises a line receiving module, a data recording module, a display module, a data storage module, a GPS (Global Positioning System) positioning module and an information sending module; the management console comprises a line sending module, an information receiving module, a comprehensive management module and a defect management module. The power line inspection system is applicable to a power system.

The invention discloses a WIFI acquisition system and a WIFI acquisition system method based on virtual AP, and relates to a virtual AP and a WIFI acquisition technology. The system comprises a virtual AP module (100), a data acquisition module (200), a data preprocessing module (300), a true/false MAC address filtering module (400) and a data center module (500) that interact in turn. The invention has the following advantages and positive effects: (1) the invention is advanced, can realize the collection of the real MAC address of the mobile phone terminal which transmits the false MAC address, and effectively avoids the collection of the false MAC address of the mobile phone by the WIFI collection system; (2) reliability of data; (3) practicability; (4) scalability, which can effectively protect the existing investment.

The invention discloses an optical access network system, optical access equipment and an optical access method. The optical access network system, the optical access equipment and the optical access method are used for resolving the problem that an existing optical access network system can not effectively utilize great bandwidth resources of optical signals and can not be compatible with different kinds of access network technology simultaneously. The optical access network system, the optical access equipment and the optical access method utilize the wavelength division multiplexing technology, can largely improve the network bandwidth, increase the number of access users, can connect various standards of optical access networks to the same network, achieve the purpose that the optical access networks are updated and improved in a seamless mode towards higher-rate networks, do not need to replace original equipment, and protect current investment. The optical access network system supports a plurality of operators to simultaneously provide network service in the same network, and the operators do not affect each other.

The method for realizing a network storage protocol stack based on an iSCSI includes: storing an IP in an IP network and transmitting block-level data so that a server is capable of connecting SCSI devices through the IP network; and network connection is based on the IP and an Ethernet and the iSCSI is one of two principal methods for transmission of storage data through the IP network. The iSCSI is mainly operated on the prior Ethernets. Generation technical backgrounds, realization principles, a realization method and advantages of the iSCSI and newest development of network storage technologies are introduced. Keywords: network storage; iSCSI protocol; TCP/IP; protocol SAN.

Disclosed are a method for operating a drive-free terminal device, a host and the drive-free terminal device, and a storage medium. The method is applied to a host side, and comprises: after establishing a connection with the drive-free terminal device and loading a system drive program, exchanging an AT command with the drive-free terminal device in a TCP/IP protocol manner. The method is further applied to a drive-free terminal device side, and comprises: after establishing a connection with a host and loading a drive program, exchanging an AT command with the host in a TCP/IP protocol manner.

The invention discloses a Web former server and a webpage access request response method of the Web former server. The webpage access request response method of the Web former server includes the steps that after the Web former server receives a webpage access request, webpage data requested by the webpage access request are determined according to a webpage address obtained by analyzing the webpage access request; the characteristic value of the webpage data is calculated according to the determined webpage data, and then whether the characteristic value exists in a compressed data table or not is determined; if yes, a compression result corresponding to the characteristic value is returned; if not, the determined webpage data are compressed and then are returned. By the Web former server and the webpage access request response method, the requirement for displaying the webpage data in real time of users can be well met. Meanwhile, compared with the mode of obtaining the compression result by compressing and calculating the webpage data, the operation mode of calculating the characteristic value is easy and rapid, storage of the compression result is combined, efficiency is largely improved, webpage response time is shortened, and user experience is improved. The webpage data are compressed without special hardware, so that cost is low.

This invention relates to network communication field, specially relates to a identification method to subscriber equipment. First, the subscriber equipment waiting for identification originates the identification message to the access control equipment at destination address: FF-FF-FF-FF-FF-FF; after the message receiving module in the access control equipment receives the messages, the adaptation layer converts the destination address in the message to '01-80-C2-00-00-03'; the message receiving module sends the identification message that has converted destination address to the identification processing module in the access control equipment; complete identification for the subscriber equipment through the protocol for dialing in user long distance identification between identification process module and identification server. The method can reduce the requirement for subscriber equipment to the network adopting 802.1X identification, make the exiting equipment to use continually in the 802.1X network.

The invention provides a system and a method for realizing information and business interaction between a smart grid and a smart city. The system comprises a smart city business definition layer, a smart city business control layer, a smart city business execution layer, and a public communication and information service layer, the smart city business definition layer pre-defines the interaction business of the smart city, the smart city business control layer obtains the pre-defined interaction business logic from the smart city business definition layer and controls the debugging operation or formal publishing operation of the smart city business execution layer, and the smart city business execution layer executes the interaction business logic and obtains resources from the public communication and information service layer. According to the system and the method, information interaction and business interaction between the smart grid and the smart city are promoted; various existing systems, resources, and services in the smart city are fully employed, the existing investment is protected, and complete redevelopment of new interdisciplinary systems is avoided; and the business logic is defined in a standard and flexible manner, and the requirement of the development of the smart grid and the smart city can be met.

The invention discloses an Internet of Things sniffing platform system based on multiple carriers and a method of the Internet of Things sniffing platform system, and relates to the collection technology of WIFI, Bluetooth and RFID. The system is characterized in that a WIFI acquisition module (100), a Bluetooth acquisition module (200) and an RFID acquisition module (300) respectively interact with a data preprocessing module (400) to realize acquisition and preprocessing of WIFI, Bluetooth and RFID data; And the data preprocessing module (400) and the data analysis module (500) are interacted, and the acquired data is subjected to collection, cleaning and filtering preprocessing and then is subjected to storage and analysis processing. The method has the following advantages: (1) advancement: obtaining information of the Internet of Things in all directions, and effectively monitoring and controlling the Internet of Things; 2, reliability; 3, practicability: the formats of data fromdifferent sources are unified, association is complete, identification is clear, and the quality and association of the data are improved; and 4, expandability: existing investment can be effectivelyprotected through convenient expansion.