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48results about How to "Implement roaming" patented technology

Wireless fetus monitoring probe network system and method

The invention provides a wireless fetus monitoring probe network system, which comprises a central station, a router, base stations, a wireless local area network and a client, wherein the central station manages the data of a user, performs monitoring operation, management of a probe sensor and uniform management and setting of the base stations manages and receives data from the base stations through routing, performs centralized display, stores monitoring data, processes monitoring data, and is responsible for giving an alarm in case of data error or other abnormal conditions; and the basestations are distributed in a hospital to form a cellular network, signals cover the required areas between the stations seamlessly, the client comprises at least one probe, the coverage of the base stations forms the wireless local area network together with the probe, the probe transmits data to the base stations through the wireless local area network, and the base stations transmit the data to the central station through the router.
Owner:EDAN INSTR

Track test system

A track test system comprises a plurality of mobile stations, a fixed reference station and at least a mobile reference station; wherein, each reference station comprises a GNSS receiver, control modules, interactive radio stations and main radio stations; the GNSS receiver is used for receiving GNSS signals and generating GNSS differential corrections; each control module is used for transmitting the data interacted between the main radio station and the interactive radio station in the reference station; the interactive radio station in the mobile reference station is used for sending the GNSS differential corrections generated by the reference station to the interactive radio station in the fixed reference station; the main radio station in the fixed reference station is used for sending the GNSS differential corrections generated by the mobile reference station and by the reference station to the mobile stations together; each mobile station is used for selecting one GNSS differential correction generated by the reference station from the received GNSS differential corrections according to the predetermined selection strategy, obtaining the GNSS position information of the mobile station according to the GNSS differential correction and returning the GNSS position information to the selected reference station. The system can expand the range of motion of the moving targets and ensure the real time of data.
Owner:BEIJING BDSTAR NAVIGATION CO LTD

Ocean vessel meteorological information service system based on WEB

The invention discloses an ocean vessel meteorological information service system based on WEB, which is characterized of comprising a vessel position information server, an electronic ocean map server, an observatory meteorological information publishing server, an ocean meteorological information data server, a WEB server and a customer end; wherein the WEB server is connected with the vessel position information server, the electronic ocean map server and the observatory meteorological information publishing server, is used for reading the ocean map information, the vessel position information and the ocean meteorological information, and is used for distributing the ocean map information, the vessel position information and the ocean meteorological information to the local area networkor the internetwork by the means of WEB page; and the customer end is used for browsing, checking and obtaining the ocean vessel position information, the ocean map information and the various meteorological information around the ocean map information distributed by the WEB server with a web browser. The WEB electronic ocean map is a platform which can be added with the vessel information, and is convenient for customers to know the vessel position and the correlative information, thereby being very suitable for being widely popularized in the shipping industry.
Owner:DALIAN MARITIME UNIVERSITY +1

Method for identifying access point identity, workstation roaming method and related equipment

The embodiment of the invention relates to the technical field of communications, and discloses a method for identifying access point identity, a workstation roaming method and related equipment. The method comprises the following steps: after a first access point receives a message, acquiring a basic service set identifier (BSSID) in the message, wherein the BSSID comprises an operator identifier of a second access point transmitting the message and an access controller identifier at the second access point; and comparing the operator identifier and the access controller identifier with the information stored in the first access point, wherein if the operator identifier is identical to the operator identifier stored in the first access point and the access controller identifier is identical to the access controller identifier stored in the first access point, judging that the first access point and the second access point belong to the same extent of jurisdiction. The embodiment of the invention can decrease the occupation of the MAC address resources.
Owner:HUAWEI TECH CO LTD

Intelligent public telephone system

This invention discloses an intelligent public phone system containing an office management system connecting with stationary commercial telephone homenet realizing office alliance panning, double calling and dialing; an office emitting end connecting to the office management system by stationary network commercial line, a internal emitting, a receiving antenna transferring information to the office management system or sending out its order, an end user telephone incoming in wirelss connection with the user wireless end phone and office emitting end, the wireless incoming of the wireless endphone sends and receives via communication signals of the information of the office emitting end and sets up independent number, cipher account with the advantage of wireless receiving and roaming.
Owner:林坚

Realization method for virtual city call commentator

InactiveCN101242457ARealize the function of "virtual local call"Implement roamingInterconnection arrangementsAutomatic exchangesInterface circuitsVoice data
The invention relates to a virtual local calls adapter and the implementation method thereof, belonging to the field of Internet voice communication technology. The adapter is characterized in that: the adapter comprises a subscriber line interface circuit, a local call line interface circuit, a data control circuit, an Ethernet interface and a power supply. The data control circuit is used for control of the above circuits and human-computer interaction interface, quantifying and coding of voice signals, compressing of voice data, packing IP packet, and providing Ethernet interface. The implementation ways are mainly virtual local call calling mode and local call roaming function. Point-to-Point direct calling mode and common local adapting mode can also be realized. The invention has the characteristics of simple adapting equipment, low cost, multiple communication modes, simple usage, a local call subscriber line is unlimited extended by Internet, and all functions of IP telephone are realized.
Owner:TSINGHUA UNIV

Wireless access point, and space jumping roaming method and system in wireless local area network

The invention relates to a wireless access point, and a space jumping roaming method and system in a wireless local area network, belonging to the technical field of wireless roaming. The method comprises a first step of building a roaming group consisting multiple discrete wireless access points; a second step of receiving, by the wireless access point, entry information of a wireless terminal station; and a third step of allowing the wireless terminal station to access automatically by the wireless access point receiving the entry information of the wireless terminal station. Through adoption of the method, the roaming access speed of the wireless terminal station in a second-level wireless local area network is ensured, and the service of the wireless terminal station is not interrupted or the interruption time is shortened.
Owner:湖州帷幄知识产权运营有限公司

Terminal roaming method and system in narrowband wireless digital communication system

The invention discloses a terminal roaming method and system in a narrowband wireless digital communication system. The method comprises the steps of detecting signal strength in an idle state; determining whether a terminal initiates a transmission service, if yes, starting active roaming, and if not, starting passive roaming; searching, based on a roaming list, a channel with signal strength greater than or equal to a weak signal threshold, locking the channel and residing; failing to find an instruction indicating transmission failure, and switching to passive roaming; scanning the roaminglist circularly, determining whether a channel with signal strength greater than a strong signal threshold exists, if yes, locking the channel and residing; if not, finding out a channel with highestsignal strength in the roaming list and determining whether the signal strength of the channel is greater than the weak signal threshold, if yes, locking the channel in which the signal is and residing, circularly scanning whether the signal strength of the channel is greater than the weak signal threshold in residing period, if yes, recalculating the residing period, and if not, re-switching to passive roaming when the residing period expires. Through adoption of the method, a base station does not need to broadcast information of adjacent base stations, so that the base station does not participate deeply.
Owner:FUJIAN KIRISUN ELECTRONICS

Ocean vessel meteorological information service system based on WEB

The invention discloses an ocean vessel meteorological information service system based on WEB, which is characterized of comprising a vessel position information server, an electronic ocean map server, an observatory meteorological information publishing server, an ocean meteorological information data server, a WEB server and a customer end; wherein the WEB server is connected with the vessel position information server, the electronic ocean map server and the observatory meteorological information publishing server, is used for reading the ocean map information, the vessel position information and the ocean meteorological information, and is used for distributing the ocean map information, the vessel position information and the ocean meteorological information to the local area network or the internetwork by the means of WEB page; and the customer end is used for browsing, checking and obtaining the ocean vessel position information, the ocean map information and the various meteorological information around the ocean map information distributed by the WEB server with a web browser. The WEB electronic ocean map is a platform which can be added with the vessel information, and is convenient for customers to know the vessel position and the correlative information, thereby being very suitable for being widely popularized in the shipping industry.
Owner:DALIAN MARITIME UNIVERSITY +1

Method for realizing communication among a plurality of subnets covered by one physical mobile switching center

The present invention discloses a method for implementing communications between multiple subnets covered by one physical Mobile Switching Center (MSC), the method includes the steps of: mapping one physical MSC to multiple logical MSCs, i.e. multiple virtual MSCs, and assigning a virtual MSC number to each virtual MSC, and setting relationship(s) between location area(s) covered by the virtual MSC and the virtual MSC number of each virtual MSC; transmitting location information of a terminal with the virtual MSC number during communications to implement communications among multiple subnets. During communication, since the terminal location is transmitted according to the virtual MSC number, it is possible to differentiate the terminals located in different subnets covered by a physical MSC, therefore the roaming and handover of the terminal between the subnets can be implemented; and the roaming limitation also can be implemented through the MSC List and VLR List.
Owner:HUAWEI TECH CO LTD

A method and system for realizing roaming of a terminal in a narrowband wireless digital communication system

The invention discloses a terminal roaming method and system in a narrowband wireless digital communication system. The method comprises the steps of detecting signal strength in an idle state; determining whether a terminal initiates a transmission service, if yes, starting active roaming, and if not, starting passive roaming; searching, based on a roaming list, a channel with signal strength greater than or equal to a weak signal threshold, locking the channel and residing; failing to find an instruction indicating transmission failure, and switching to passive roaming; scanning the roaminglist circularly, determining whether a channel with signal strength greater than a strong signal threshold exists, if yes, locking the channel and residing; if not, finding out a channel with highestsignal strength in the roaming list and determining whether the signal strength of the channel is greater than the weak signal threshold, if yes, locking the channel in which the signal is and residing, circularly scanning whether the signal strength of the channel is greater than the weak signal threshold in residing period, if yes, recalculating the residing period, and if not, re-switching to passive roaming when the residing period expires. Through adoption of the method, a base station does not need to broadcast information of adjacent base stations, so that the base station does not participate deeply.
Owner:FUJIAN KIRISUN ELECTRONICS

Method and system for sending and receiving single-card dual-standby service message based on short message expansion platform

The invention discloses a method and a system for sending and receiving a single-card dual-standby service message based on a short message expansion platform. The method for sending the single-card dual-standby service message comprises the steps of: judging whether the number of a called party receiving a first message contains a preset prefix or not by a number attribution information center of a calling party, and if so, sending the first message to a first EMP (Extended Message Platform); acquiring a main number and a second number of the calling part from the first message by the first EMP, and sending the main number and the second number to a single-card dual-standby service system by the first EMP; and converting the main number of the calling party into the second number by the first single-card dual-standby service system to acquire a second message, and sending the second message to the first EMP by the first single-card dual-standby service system. By the adoption of the method and the system for sending and receiving the message, the second number can be used for sending or receiving the message no matter where the calling part and the called part are, so that message sending and receiving in roaming is realized.
Owner:SICHUAN UCS COMM TECH

WIA-PA node network roaming method

The invention relates to a WIA-PA node network roaming method, which comprises the following steps of: dividing a WIA-PA network into a plurality of modes, and dividing each mode by using a channel; when the node accesses the network, monitoring the broadcast frame on the broadcast channel in each mode in sequence; when the broadcast frame is monitored in a certain mode, the network in the mode is added; after the nodes access the network, communication is carried out in the channels distributed in the network, and the change of broadcast signal strength in each superframe of the current network is recorded; and when the broadcast signal intensity average value of a certain other network is greater than the broadcast signal intensity average value of the current network, taking the other network as a new network. According to the method, frequency points of an ISM 2.4 G frequency band are grouped, different groups of networks send broadcasts in agreed different time slots, and nodes identify the existence of a new network by receiving the broadcasts. And whether other networks are added or not is determined according to the change of the broadcast signal intensity of the current network and the identified other networks, and network switching is carried out. The roaming of the WIA-PA dynamic node among different networks is realized.
Owner:SHENYANG ZHONGKE AOWEI SCI & TECH CO LTD
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