186 results about "CDMA2000" patented technology

Various schemes for performing inter-system handoff, e.g., from a UTRAN to a cdma2000 radio access network (RAN) are described. For a MAHHO scheme, the UTRAN uses measurements obtained by a multi-RAT device to determine suitable cdma2000 cell(s) for handover. The measurements are obtained by a candidate frequency search procedure, and the handover is accomplished by a handoff execution procedure. For a MDHHO scheme, the UTRAN relies on location information for the multi-RAT device to select suitable cdma2000 cell(s) for handover. For a CRHHO scheme, a new call is established on the cdma2000 RAN and the pending call on the UTRAN is released in a manner such that the handover appears seamless to the multi-RAT device. The multi-RAT device includes two modem processors that perform processing for the UTRAN and cdma2000 RAN and an application processor that controls the modem processors.

A wireless device uses position-indicating data to determine its location in relation to multi-layered wireless networks that the device may see concurrently. If location information is available, the device employs a user-defined priority table to select the order of user-contracted available networks. If location information is unavailable, the device employs a technology learning table to automatically adapt CAI protocol options (e.g., GSM, cdma2000, IS-136, IEEE 802.11x, etc.) to search for an available network. Information is gathered and stored in databases within the device to allow automatic adaptation to multiple wireless networks. The device provides unique access to each wireless network with which a user has contracted, without the intervention of any “anchor” network. This allows the device to obtain network service no matter what network it is traveling through and allows the user to traverse multiple wireless networks with seamless access to multiple applications and services provided by those networks.

A system (100) for authentication in a wireless local area network (WLAN) includes a CDMA2000 authentication center (190) for authenticating CDMA2000 credentials (110), a WLAN authentication server (150) for using the CDMA2000 credentials to authenticate WLAN devices holding CDMA2000 credentials, and at least one WLAN device (130) holding CDMA2000 credentials. The WLAN server (150) performs a CDMA2000 global challenge and response (213) and a CDMA2000 unique challenge and response (223) with a WLAN device to obtain a CDMA2000 encryption key (233). The WLAN server (150) derives a master key from the CDMA2000 encryption key (234) and uses the master key to perform a WLAN challenge and response (237) with the WLAN device (130) and then derives session keys from the master key (240). The session keys protect communications between the WLAN access point (140) and the WLAN device (130).

The invention discloses remote video monitoring system and method suitable for 3G mobile network communication, relating to the field of remote control and monitoring. The invention realizes the purpose of remotely controlling or viewing a target scene in real time by connecting a mobile phone or a personal computer to one or more intelligent network cameras, wherein the mobile phone can be any 3Gsmart mobile phone which supports WCDMA, TD-SCDMA or CDMA2000, which guarantees the universality of remote monitoring. The intelligent monitoring system of the invention has the characteristics of convenient use, easy deploy, easy popularization, and the like and brings a new bright spot to security causes.

A method, apparatus, and computer-readable media for determining the position of a user terminal comprises receiving at the user terminal a broadcast television signal from a television signal transmitter; determining a first pseudo-range between the user terminal and the television signal transmitter based on a known component of the broadcast television signal; receiving at the user terminal a mobile telephone signal from a mobile telephone base station; determining a second pseudo-range between the user terminal and the mobile telephone base station based on a known component of the mobile telephone signal; and determining a position of the user terminal based on the first and second pseudo-ranges, a location of the television signal transmitter, and a location of the mobile telephone base station; wherein the mobile telephone signal is selected from the group consisting of a EDGE (Enhanced Data Rates for Global System for Mobile Communications (GSM) Evolution) signal; a Code-Division Multiple Access 2000 (cdma2000) signal; and a Wideband Code-Division Multiple Access (WCDMA) signal.

Systems and methods are provided to permit a network, such as a data only network (e.g., cdma2000 1X-EVDO), with which a mobile terminal is not currently communicating to notify the mobile terminal that the network desires to establish communication with the mobile terminal, even in instances in which the mobile terminal is actively communicating via another network, such as a voice and data network (e.g., cdma2000 1X) and has stopped monitoring for paging messages. The mobile terminal can then end communications with the network with which it has been previously communicating and commence communications with the other network that has transmitted the paging message. For example, a mobile terminal may terminate voice communications via a voice and data network in order to receive a MMS message via a data only network upon receiving notification that the data only network desires to establish a communications session with the mobile terminal.

The embodiment of the invention discloses a method, equipment and a system for sharing a frequency spectrum resource, which relate to the field of wireless communication and are used for realizing the sharing of a dynamic frequency spectrum resource among different mobile honeycomb networks on the basis of ensuring the network coverage and the service continuity. The method comprises the following steps: dividing the frequency spectrum resource into a basic frequency band and a dynamic frequency band, wherein the basic frequency band is used for ensuring the network coverage and the service continuity of at least two networks of the sharing frequency spectrum resource; fixedly distributing the basic frequency band in the frequency spectrum resource to at least two networks in a static mode, and distributing the dynamic frequency band in the frequency spectrum resource to at least two networks in a dynamic mode; and transmitting the frequency spectrum resource distribution information of the basic frequency band and the frequency spectrum resource distribution information of the dynamic frequency band to a base station so as to be used for the frequency spectrum resource allocation of the base station. The invention is suitable for mobile honeycomb networks, such as GSM, UMTS, LTE, CDMA2000, WiMAX and the like.

An apparatus for performing a soft handoff including a power estimator, cell selector, and feedback channel generator. The power estimator receives a plurality of pilot signals that each correspond to an associated base station within an active set registry, and estimates a power level for each of the plurality of pilot signals. The cell selector is coupled to the power estimator, and is configured to select one or more base stations within the active set registry for selective blanking of a corresponding one or more of the plurality of pilot signals during a soft handoff operation. The feedback channel generator is coupled to the cell selector, and is configured to generate a cell selection feedback signal indicating the one or more base stations, where the cell selection feedback signal is subsequently transmitted to the one or more base stations, and where the cell selection feedback signal directs the one or more base stations to perform the selective blanking.

A wireless communication terminal able to change a resonance frequency of a sub antenna, able to reduce interference to a main antenna, and able to suppress deterioration performance in a dual terminal compatible with a plurality of transmission systems, wherein, in a wireless communication unit, at the time of a CDMA2000 1xEVDO mode, a first receiver circuit, a second receiver circuit, and a transmitter circuit are in an operative state, and, in the second receiver circuit, an input impedance is held at the 50 ohm input impedance of a LNA by an impedance control unit, while at the time of a CDMA2000 1x mode, the first receiver circuit and the transmitter circuit are in the operative state, the second receiver circuit is in an inoperative state, and, in the second receiver circuit, the input impedance is controlled so as to be shifted from the 50 ohm input impedance of the LNA by the impedance control unit, and an antenna switching control method for the same.

The invention relates to an aviation communication system and method, especially an aviation communication system and method for realizing ground-air and air-air communication based on public mobile communication network. Based on the existing national public mobile communication standard and criterion, it uses signalling channels, data service channels and voice service channels of wireless access networks of telecom operators (including GSM, GPRS, IS-95, CDMA2000, WCDMA, PHS, etc), establishes aircraft-oriented special air base station, special air repeater and partial existing public stations to cover air users in all air domain from horizon to top air, adopting mobile communication terminal meeting national and trade standard or custom terminal to realize ground-air and air-air communication. It can not only effectively solve ground-air and air-air communication in most areas in the land and the areas along the coast but also realize ground-air and air-air two-way data and voice communicating function at lower cost.

The invention provides an anti-self-excitation method in a repeater system, and is applicable to the uplink and the downlink of a co-frequency wireless repeater. The method includes the following steps of: (1) taking a RF signal to be outputted in the coupling circuit in the uplink or the downlink in the repeater as a reference signal; (2) down converting the single in an affiliated link and the reference signal from a RF signal format to a baseband signal format; (3) eliminating the self-excitation element of the link signal in the affiliated link on the basis of the reference signal in the baseband level, for outputting a multi-carrier wave baseband signal of which the self-excitation interference signal is eliminated; (4) up converting the multi-carrier wave baseband signal into the RF signal and feeding the RF signal into the uplink or the downlink. The invention can cause the co-frequency wireless repeater to eliminate the self-excitation interference produced by the feedback signal effectively and adaptively, can lessen the requirement of the isolation degree of forward and backward antennas, can improve the gain of the system, can enlarge the coverage of the repeater, and is applicable for GSM/CDMA/CDMA2000/WCDMA, and other systems.

A mutual authentication method is provided for securely agreeing application-security keys with mobile terminals supporting legacy Subscriber Identity Modules (e.g., GSM SIM and CDMA2000 R-UIM, which do not support 3G AKA mechanisms). A challenge-response key exchange is implemented between a bootstrapping server function (BSF) and mobile terminal (MT). The BSF generates an authentication challenge and sends it to the MT under a server-authenticated public key mechanism. The MT receives the challenge and determines whether it originates from the BSF based on a bootstrapping server certificate. The MT formulates a response to the authentication challenge based on keys derived from the authentication challenge and a pre-shared secret key. The BSF receives the authentication response and verifies whether it originates from the MT. Once verified, the BSF and MT independently calculate an application security key that the BSF sends to a requesting network application function to establish secure communications with the MT.

The invention discloses a method for supporting cross system residence and switch of a multimode system, comprising: when the network side system supports the WCDMA protocol and/or the TD-SCDMA protocol and or/ the cdma2000 1x protocol and/or the HRPD protocol, the network side adds the adjacent cells information and the measuring task of LTE and/or UMB and/or WiMAX in the protocol to make the terminals capable of measuring the adjacent cells of LTE and/or UMB and/or WiMAX protocol in the network of WCDMA and/or TD-SCDMA and/or cdma2000 1x protocol or HRPD protocol and reporting the measuring result to a superior system. The invention makes the prior network capable of sending adjacent cells information of LTE and/or UMB and/or WiMAX, thus not only the continuous overlay can be realized with the help of the existing network when the network of a new protocol has insufficient overlay and weak signal intensity at the initial setup stage, but also a new network is selected preferably when the network service of a new protocol with stronger wireless capability is available.

The invention provides a method that supports cross-system residency and switch of a multimode terminal. The method comprises the following steps: when a network side system supports a WiMAX protocol, the adjacent cell information and measurement requirements of GSM and/or TD-SCDMA and/or WCDMA and/or cdma2000 1x and/or HRPD and/or LTE and/or UMB are added to the protocol by the network side, so that the terminal can measure the adjacent cells of other protocol networks in the WiMAX protocol network. The method improves the WiMAX network, and enables the WiMAX network to send the adjacent cell information of other protocols. Therefore, when a blind area exists in the signal coverage area of the WiMAX network and the signal intensity is low at the beginning of network setting, the WiMAX network can not only realize continuous coverage through other networks, but also preferentially select the WiMAX network when new protocol network services of higher wireless capability are available.

The invention relates to a video wireless transmission control method suitable for CDMA2000, which comprises the following steps: (1) taking CDMA2000EVDO as a wireless access mode; (2) packaging H.264 video streams again based on the real-time transport protocol (RTP); (3) introducing an RTCP feedback mechanism to realize congestion control: 3.1) acquiring video data packets by a receiving terminal from a sending terminal; 3.2) judging the current state of the network by adopting the RTP/RTCP at the receiving terminal, and feeding the state back to the sending terminal in a form of a receiving terminal report; and 3.3) adjusting the video transmission rate by the sending terminal by adjusting the video resolution and the frame rate; and (4) realizing real-time interconnection of any equipment terminal to any monitoring point by adopting a mode of point-to-point interconnection. The invention can be effectively suitable for transmitting real-time videos in an unstable wireless channel with low bandwidth, high error code and high delay.

The invention discloses a method for planning wireless network, which includes following process: acquires the wireless network construction target, resources provided by runner, configures the land form and feature information; if the state information of the network is tested and gathered with the flash network; the design of network topology structure, determines the wireless parameter of the planned station and station through simulation or calculation; surveys the planned station, finds out the station accordant to the demands in real environment, the planed station which can not find the correspondent station, it is returned to adjust the network topology structure; sets the project construction of determined station and opens the wireless parameter needed to be set, and determines if it is accordant to the demands through simulation. The method can monitor the process of wireless network design effectively, upgrade the efficiency of wireless network design, which can be applied to wireless network plan design such as GSM, CDMA, PHS, GPRS, cdma2000, WCDMA.

The invention relates to an air supervision internet of things system with a low-altitude aircraft, which comprises a global positioning system (GPS) satellite, the low-altitude aircraft provided with ADS-M transceiver airborne equipment, a mobile communication cellular cluster base station, a ground mobile communication cellular cluster base station cluster service platform, an internet and a low-altitude aircraft air traffic control center; and the ADS-M transceiver airborne equipment is installed in the low-altitude aircraft, carries out upper and lower data link data communication with the mobile communication cellular cluster base station by adopting a TD-SCSMA/TD-HSDPA or GSM/GPRS/EGPRS or WCDMA/CDMA2000 or GSM/GPRS communication mode and is connected with the low-altitude aircraft air traffic control center through the ground mobile communication cellular cluster base station cluster service platform and the internet.

The invention discloses an environmental monitoring system of a greenhouse, comprising an environmental monitoring device, a cell phone user terminal and a controller, and further comprising an intelligent supporting platform, wherein the intelligent supporting platform is in network connection with the environmental monitoring device through a communication base station network covered by a China Telecom CDMA2000 (Code Division Multiple Access 2000) communication technology; the intelligent supporting platform is in short-message connection with the cell phone user terminal through a telecom short message gateway; a user accessing terminal is in network connection with the intelligent supporting platform through an Internet; and the controller receives a sending instruction of the cell phone user terminal through the environmental monitoring device. The environmental monitoring system of the greenhouse remotely uploads environmental monitoring data to the intelligent supporting platform, utilizes a 2.4-G wireless communication technology to carry out short-range communication among the environmental monitoring device, the sensor and the controller, and is used for controlling equipment including an automatic shutter rolling machine and the like in a short message manner. A user can obtain the environmental monitoring data of a monitoring site at any place with a network, and a cell phone is used for controlling the relevant equipment.

In an embodiment, if service on both first and second networks is available, an access terminal negotiates with an access network to establish a paging cycle for the first network (e.g., 1x EV-DO) and a first dynamic paging cycle for the second network (e.g., CDMA2000 1x). If service on the second network is maintained but service on the first network becomes unavailable, the access network negotiates a second dynamic paging cycle (e.g., more aggressive or shorter than the first dynamic paging cycle) for the second network. If the access terminal determines that service on the second network is maintained and service is again available on the first network, the access terminal re-negotiates the first dynamic paging cycle for the second network. Accordingly, paging cycles on the second network are dynamically adjusted based on a service availability status of the first network.

The apparatus comprises: a data exchanging interface used for intercommunication with external data; a FPGA module used for analyzing and giving out the received data, for packaging and giving out the transmitted data and for control the clock signal of the apparatus; a memory module used for buffering the data after the analyzing and before the packaging and relevant instruction data; a DSP used for reading out the data in the memory module and making relevant process, and for processing the transmitted data and transmitting it to the FPGA. The system completes the relevant testing based on the apparatus above. The invention can be used in TD=SCDMA, CDMA2000 and WCDMA system.

An IP multicast system includes: an IGMP proxy unit set in an access network which provides information of a multicast group to which a terminal belongs. The IGMP proxy unit receives data sent from a multicast data source, and sends the data to a base station which then sends the data to the terminal. The IGMP proxy unit simplifies IP multicasting in the mobile network and makes the transfer of multicast data transparent with respect to the core network of the mobile network. This system can support mobile communication networks as WCDMA, CDMA2000, GSM and TD-SCDMA.

Various schemes for performing inter-system handoff, e.g., from a UTRAN to a cdma2000 radio access network (RAN) are described. For a MAHHO scheme, the UTRAN uses measurements obtained by a multi-RAT device to determine suitable cdma2000 cell(s) for handover. The measurements are obtained by a candidate frequency search procedure, and the handover is accomplished by a handoff execution procedure. For a MDHHO scheme, the UTRAN relies on location information for the multi-RAT device to select suitable cdma2000 cell(s) for handover. For a CRHHO scheme, a new call is established on the cdma2000 RAN and the pending call on the UTRAN is released in a manner such that the handover appears seamless to the multi-RAT device. The multi-RAT device includes two modem processors that perform processing for the UTRAN and cdma2000 RAN and an application processor that controls the modem processors.

Disclosed is a method for implementing authentication of high rate packet data (HRPD) services, applicable to multi-mode networks including IS95/CDMA2000 1x and CDMA2000 HRPD networks. The method includes an Access Terminal (AT) using the user information in the User Identity Module (UIM) as the user identifier and starting an authentication in accordance with the Extended Authentication Protocol (EAP). A Mobile Switching Center (MSC)/Visiting Location Register (VLR) obtains a random number and a first authentication number based on the user identifier, and the AT calculates a second authentication number based on said random number. The MSC/VLR compares the first authentication number with the second authentication number to determine whether they are consistent. If consistent, the authentication is successful. Otherwise, the authentication is aborted. With the disclosed method, authentication can be made by using the original MSC and HLR/AC in the CDMA IS95 or CDMA2000 1x network. The method allows low cost and easy operation for the user as well as convenient maintenance for the operator.