511 results about "Cdma networks" patented technology

A method for performing a hard handoff of a call from a first cell site of a CDMA cellular network to a target cell site of a second cellular network, such as an AMPS network or a second CDMA network. As a mobile unit operating in the first CDMA network moves toward the second cellular network, the first cell site uses two separate RTD thresholds for comparison with a measured RTD distance between the mobile unit and the first cell site. Handoff is initiated when the RTD distance exceeds the first RTD threshold and is completed when the RTD distance exceeds the second RTD threshold. If the first cell site is not co-located with a cell site of the second network, the first cell site utilizes receivers placed in the target cell site for handoff. If the first cell site is co-located with a second cell site of the second network, the second cell site of the second network is always the target cell site.

An Internet protocol (IP) based location system that employs a global positioning system (GPS) component in connection with a position determining entity (PDE) component to determine location of target mobile station(s) via the Internet. As such the system provides an internet protocol based scheme (e.g., UDP) to initiate a location determination session within a CDMA network. The system can provide a location determining service even when the mobile station(s) are not within a home network (e.g., roaming situations). The system can also employ HTTP over TCP/IP so as to facilitate communications between the mobile station(s) and a mobile positioning center (MPC) (e.g., authentication and/or security protocols/schemes). Furthermore, the system can identify a PDE of a plurality of available PDEs that is most suitable for a given state of the mobile station and/or state of the user and/or particular location based application being employed by the mobile station.

A new scheduling discipline is disclosed for the forward link of a wireless network such as a CDMA network. The new discipline, which we denominate Modified LWDF (M-LWDF), resembles the known LWDF discipline in that only one queue is served at a time, and the queue to be served is that having the largest weighted delay. According to M-LWDF, the weighted delay of the i'th queue is defined aswherein Wi(t) is a packet delay, a queue length, or an increasing function of packet delay or queue length for the i'th queue, ci(t) is a weight coefficient descriptive of channel conditions for the i'th user, and gammai is a fixed constant that can be chosen arbitrarily. We have found that if any scheduling discipline can yield stable queues for a given traffic pattern of arriving packets, then M-LWDF can, even under changing channel conditions. Moreover, we have found that M-LWDF can provide favorable QoS in terms of delay bounds.

In a synchronization scheme, for example for establishing a channel in a UMTS radio communication system, when a user device (or user equipment, UE) such as a mobile terminal is establishing a channel with a network, the user device transmits signals on the uplink DPCCH, and the power of these signals is ramped up from a calculated initial power level until the transmission is detected by the receiver, i.e. until the receiver has obtained synchronization to the uplink signal.

A system, method, and device for a soft-hard handoff within a wireless telecommunications network are provided. The network may include a mobile station using a first carrier frequency for communication with a base transceiver station (BTS). The BTS may send a carrier frequency list to the mobile station that includes one or more carrier frequencies. The mobile station may include a carrier frequency searcher (CFS) that searches across the carrier frequencies to find a pilot signal having a strength greater than a threshold value. The mobile station may perform a soft-hard handoff by tuning itself to a second carrier frequency associated with the pilot signal. Subsequent communications involving the mobile station may use the second carrier frequency.

A method for establishing P2P (peer-to-peer) communication in wireless communication networks, comprising steps of: determining whether two user equipments (caller and call) are in the same cell, and computing whether the distance between the two user equipments (UEs) meets the requirement for P2P communication according to the registry information and position information of the caller and the callee; determining whether the two UEs both have P2P communication capability according to the information of the wireless communication system indicating whether the two UEs both have P2P communication capability, when the two UEs are in the same cell and the distance between the two UEs meets the requirement for P2P communication; and allocating direct communication link for the two UEs to start communication when the two UEs both have P2P communication capability.

The invention provides a ship remote monitoring system, relating to a remote monitoring system, in particular to a ship remote monitoring system. The ship remote monitoring system can monitor the state of travelling ships and transmits the real-time information of the ship to the Internet by GPRS/CDMA network or satellite; the real-time information is then transmitted to shipping units such as maritime department and shipping company, etc. by the internet; furthermore, data is processed, disposed and analysed. The ship remote monitoring system has the advantages of extremely far transmission distance, stable system and even realizing global communication; the ship remote monitoring system is provided with a set of redundant independent GPS system which can position normally during the failure of AIS; the ship remote monitoring system is provided with a rich and practical visible interface and facilitates the intuitive transmission of the information of ship to corresponding business personnel.

Disclosed is a method for optimizing hard handoffs, e.g., between Mobile Switching Centers in a CDMA network. In the method, preliminary conditions for a hard handoff test are first set up. Idle handoffs are then performed in a hard handoff area, log data for the idle handoffs is analyzed and adjustments to communication equipment are made accordingly. Next, hard handoff tests are conducted in a traffic state in the hard handoff area. Log data of the hard handoff tests are analyzed and further adjustments to communication equipment are made if hard handoff performance during the hard handoff tests is determined to be unsatisfactory. A final hard handoff confirmation test is then performed in the hard handoff area following the latter communication equipment adjustments.

The invention relates to a wireless intelligent lighting switch system, based on ZigBee protocol, which comprises: wireless gateway, intelligent switch integrated control module and several intelligent switch terminal modules. When in working, the switch control circuit of each intelligent switch terminal module is connected to the lighting tube; the wireless gateway can connect the Zigbee network to the internet, GPRS and CDMA network, to receive the inquire, check and control of internet, mobile phone and hand-held terminal; the intelligent integrated control module can build the ZigBee network, while it is connected to several intelligent switch terminal modules to form network; several intelligent switch terminal modules via the intelligent switch integrated control module can realize the inquire and control on the switch state of lighting tube. The invention, based on ZigBee protocol, has remote control function; better expanding property, easy installment, and simple maintenance, to seamless replace or upgrade the lighting switch system of former structure.

A near-shoe ship motion video detect system belongs to traffic transmission technical field, comprising that the video information collected by a video server, the ship dynamic information collected by a positioning and transmitting terminal, and the ship AIS information collected by a remote AIS information transfer device, via CDMA network high-speed ship shore data transmitter and a CDMA network, are accessed into Internet to be sent to a detect center server of a near-shore ship motion video detect system in pointed IP address, therefore, user can use the client software of near-shore ship motion video detect system to connect the detect center server to detect ship. The invention has the advantages that the invention can effectively reduce and prevent sea accident, improve detect level, and protect users, mainly used in traffic transmission technical field.

Method and system for discrete soft handoff of a mobile terminal in a wireless CDMA network. A plurality of mobile terminal-base station channels used for soft handoff are reserved to perform soft handoff of a mobile terminal. Soft handoff of the mobile terminal is then performed in a discrete fashion by first predicting which of the reserved channels will be "strong" and "weak" channels for transmission of the next CDMA data frame. At least one of the strong channels is included in the active set of handoff legs used to transmit the next CDMA data frame. The next data frame is then transmitted via only those channels within the active set. This process repeats, wherein the strong and weak channels are predicted prior to the transmission of each CDMA data frame, at least one strong channel is included in the active set for each CDMA data frame, and each CDMA data frame is transmitted via those channels in the active set. Soft handoff occurs because those channels used to communicate each CDMA data frame will change based on the predicted channel strength for each reserved handoff leg. Because weak channels are not used for soft handoff, additional processing complexity, power consumption, and network architecture difficulties associated with prior art soft handoff methods are avoided. Yet there is no substantial loss in performance, because those CDMA data frames that would have been communicated over weak channels are insignificant when a best CDMA data frame is obtained by either CDMA frame aggregation or selection techniques. Thus, the present invention reduces processing requirements, power consumption, and architectural difficulties associated with soft handoff at substantially no performance loss.

The invention discloses a community health-oriented portable monitoring system. A physiological parameter monitor arranged on a home monitored target transmits data to a user computer through a serial port; the physiological parameter monitor transmits alarm information and individual physiological monitoring information of a patient to a community monitoring server and a preset individual mobile communication terminal through a wireless transmission GPRS/CDMA network; the user computer analyzes each obtained physiological parameter value of the monitored target, stores the physiological parameters in a database and displays all the physiological parameters in real time; and the community monitoring server is connected with a plurality of physiological parameter monitors through the network so as to remotely monitor a plurality of home monitored targets and perform correspondingly processing. The portable monitoring system of the invention can simultaneously monitor seven parameters of the patient in real time, is worn by the patient just as the patient wears a watch, uninterruptedly monitors the change of each parameter within 24 hours, communicates with the community monitoring server through the wireless network and completely feeds back the condition of the patient, and is light and comfortable.

In a mobile wireless telecommunications system, which includes base stations (30) of a first type operating over a first air interface, and base stations (32) of a second type operating over a second air interface, a method for reselection by a mobile station (40) camped on a cell associated with a first base station (30), which is of the first type, of a second base station (32), which is of the second type. The method includes receiving signals over the second air interface from the second base station (32) and evaluating a characteristic of the signals. Responsive to the characteristic, the second base station (32) is selected in place of the first base station (30), and the mobile station (40) camps on a cell associated with the second base station (32).

A system and methodology for implementing an all-Internet Protocol for voice and data communications on a code division multiple access (CDMA) network. An access control server is employed to handle packetized communications within the CDMA network. The methodology is preferably also employed when migrating from a legacy, circuited-switched system to the improved packet-switched, all-IP CDMA system of the present invention.

A method for providing advertising content. The method includes the steps of collecting customer preferences; transmitting targeted multimedia ads to customers based on the individual customer's preferences via a telecommunications network; and receiving and outputting the ads on a mobile platform. In the illustrative embodiment, the method includes the steps of encoding, compressing and storing each ad on a server. An applet is transmitted from the server to each mobile platform. When executed at the mobile platform, the applet deciphers the ad and retrieves a schedule with a playback time. The ad is then played out without interrupting the user. The applet may include credit code which adds time to a SIM card on the mobile platform giving a user credit time to use the device for one or more functions (communication, games, etc.) at no additional charge. The applet may also include a bar code which when displayed to a third party vendor, allows the user to receive a discount on purchases of goods or services related to the ad. In the best mode, the mobile platform includes a cellular transceiver adapted for a GSM or CDMA network. The mobile platform stores data relating to the output of the ads and sends this data on command back to the server. The server includes code for forwarding this feedback data to advertisers.

The present invention discloses an online early warning device of the ice coating and throwing about the electric transmission line. The early warning device consists of a data collecting terminal, a wireless communication base station and a specialist analyzing device. The data collecting terminal includes a solar battery board for charging the storage battery, and the insulator collecting signals are input into each sensor, a pretreatment unit, a central data processing unit, a transmitting and receiving unit of a wireless communication base station, a transmitting wireless communication device, a transmitting and receiving unit and a computer of the specialist analyzing device. The combination of the units is reasonable and the using of the device is convenient, the data is transmitted through the wireless relay, GSM, CDMA network and the security of the line is known by combining the parameters of the spot image, the temperature, the humidity, the wind speed, the wind direction and the weight of the guide line and the extent of throwing about. The over-standard electric transmission line is alarmed in time for directing the examining, repairing and preventing. 50-20000Hz signals can be detected; the power consumption is 3mA; the manpower, material resources and time can be saved and the device can be widely used on the high-pressure electric transmission lines.

A method enables the use of a secondary pilot signal and a secondary antenna(s) in the forward link of a CDMA-based cellular network employing a slotted transmission scheme with a time-multiplexed primary pilot signal, with backwards compatibility. The forward link is divided into a number of time slots. For communications with “legacy” mobile stations that expect transmissions from a single, primary antenna (and that expect a single, primary pilot signal), during some of the time slots, only the primary antenna is used for transmissions, including transmitting the primary pilot signal. Neither the secondary pilot channel nor any other signals from the secondary antenna are transmitted. During the remaining time slots: (i) the primary pilot signal is transmitted from the primary antenna, and the secondary pilot signal is transmitted from the secondary antenna, but at different times; and (ii) data meant for the legacy mobile stations is not transmitted.