515 results about "Cdma networks" patented technology

With the addition of high-speed data traffic to traditional CDMA cellular networks, there is a need to efficiently utilize system capacity so that the quality of service of existing voice and low-speed data users is maintained while new high-speed data users are added to the network. Methods and systems are presented that control allocation of power to users, quality of service requirements, and / or user activity levels to enhance capacity utilization. These methods and systems are based on a method for estimating the capacity of a CDMA carrier with both voice and data users using an interference-based analysis of the reverse link. In particular, the methods enhance capacity utilization in a multi-code CDMA network architecture, in which several codes are allocated to a single high-speed data user for parallel transmission.

A mobile wireless telecommunications system includes base stations of a first type operating according to a first air interface, and base stations of a second type operating according to a second air interface. Methods and apparatus are provided for handing over a mobile station in the system from a first base station, which is of the first type, to a second base station, which is of the second type. A communications link is established over the first air interface between the mobile station and the first base station. Data is received from the mobile station responsive to a signal received by the mobile station over the second air interface from the second base station, substantially without breaking the communications link with the first base station. The mobile station is handed over from the first to the second base station responsive to the data received therefrom.

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.

A method and system for determining a location of a user equipment using RTT measurements from a connected node B and RTT measurement of other node Bs which are not connected to the user equipment. The radio network controller of a network measures RTT of a connected node Bs and then measures RTT of non connected node Bs. Based on the RTT measurement, the distances of the user equipment from each node B is determined. Circles having radii equal to the distances of the user equipment from the nodes are used to determine the user equipment location.

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 method and apparatus to dynamically control selectable vocoder rates in a CDMA network to optimally improve forward and reverse link capacity as necessary. To improve capacity, a number of vocoder rates are used, each requiring a different average data rate and providing a different level of voice quality. Vocoder rates are reduced to lower sector average output power thereby improving forward and reverse link capacity. Forward and reverse link loading are compared to established thresholds that, if exceeded, would trigger a forward link and a reverse link vocoder rate adjustment as necessary to improve network capacity. The forward link vocoder rate and reverse link vocoder rate may be set independently or the reverse link vocoder rate may be set as a function of the forward link vocoder rate to maintain a link balance.

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).

The invention discloses a method of searching for the network after switching on a mobile phone capable to have two SIM cards on line and usable for both GSM and CDMA network systems. 1 the mobile is switched on; 2 the information on two SIM cards is read; 3 seven steps are included as follows: 3.1 SIM1 searches and monitors a BCCH signal path, 3.2 LAI of the prior channel is acquired, 3.3 if the acquired LAI of the channel is at variance with that on the SIM card, the band of position is caused to update, 3.4 if the acquired LAI in the channel consists with that on the SIM card, MSC attachment is carried through, 3.5 the new LAI and the BCCH frequencies are listed, the acquired TMSI is written into the SIM card, 3.6 the mobile phone is in the stand-by condition, 3.7 the prior network information is displayed; 4 a SIM card2 completes the network choice and the channel choice independently according to the flow of 3. When the two cards belong to the same carrier, the second SIM card shares the network parameter in the SIM1, and processes the same flow of searching for the network. The invention solves the problem of two SIM cards signing in the network after switching on the mobile phone.

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.

A base station (BS) is configured to support a plurality of mobile stations on the reverse link by selectively designating one or more of them as members in a rate-controlled set. Members follow the common rate control commands broadcast by the BS, while non-members do not. The non-members preferably fall back to a minimum data rate. Set members each provide feedback to the BS indicating whether the member is “mobile-limited” wherein it cannot increase its reverse link data rate even if commanded to do so by the BS, or whether the member is “command-limited” wherein the member could increase its data rate but is not permitted to do so by the BS. The BS dynamically adjusts membership in the set to maintain a balance between having too many mobile-limited or command-limited members, since either condition is inefficient. The BS also may adjust membership by attempting to equalize membership times in the set.

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).

The system comprises: mobile phone terminal, mobile phone short message service center, management center server and WEB server. The mobile phone terminal establishes the connection with the management server through GSM / CDMA network, short message service center and internet; the WEB server is connected to the management center through LAN; the WEB server provides a WEB-based service. The automatically-updating method comprises: after the client side software of mobile phone detects the mobile phone changed the number of SIM card, it registers the new number on the management center; after registering the new number, the management center reads out the communication numbers saved in its database, and sends them out; the destination mobile receives the changed number, and automatically renews the number in its phone book. The invention also reveals a method for enabling an encrypted communication.

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.

Our invention is a method and system for solving the problem of blocked calls by load balancing in which overloaded sectors reduce their coverage region, thereby, shedding users, and the surrounding under-loaded sectors increasing their coverage to pick up the shed users. The users are shed from one sector to another by growing or shrinking the relevant sectors through adjustment of the overhead channel power. The overhead channel power allocation parameter is adjustable by the network operator. The setting for the overhead channel power allocation is increased for overloaded sector and decreased for under loaded sector.

The invention discloses processing method and system for an M2M terminal call. In the method, after being switched on and started, a plurality of M2M terminals respectively acquire respective random time and respectively carry out delay according to the respective random time; and after the delay is finished, the M2M terminals respectively establish connection with an application system by a wireless network. The processing method and system for the M2M terminal call can solve the problem of network congestion caused by the simultaneous access of a plurality of terminals in an M2M business in a calling delay way, thereby removing obstacles for providing an application service having the characteristics of strong instantaneity, small transmission flow, long-time networking, and the like for a CDMA system and simultaneously ensuring that an M2M business can be commonly developed with other businesses in a CDMA network.

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.

An interactive voice response system (102) includes a protocol interface (134) that is adapted to communicate with a plurality of divergent telecommunications networks for voice communications (104, 106, 108, 110). These networks are, for example, a wireline telecommunications network, a CDMA network, a GSM network, and a voice over IP network. A controller (136) is coupled to the protocol interface to receive a plurality of common call control messages from, and to supply a plurality of common call control messages to, the protocol interface. The protocol interface converts control messages from each one of the plurality of divergent telecommunications networks into the plurality of common call control messages for the controller. The controller generates and receives the common call control messages to cause a prompt and collect interaction with a caller that is using a device that is coupled to one of the networks. The common call control messages generated by the controller are converted by the protocol interface into control messages that are appropriate for the particular network that is to receive the control message. That is, the common call control messages are converted to the network's protocol.

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.

The invention relates to a radioactive source automatic supervision and real-time monitoring method and a system. The method mainly comprises the following steps: a positioning terminal in which a GPS positioning unit and a CDMA network positioning unit are arranged and source file information is solidified is arranged on a radioactive source; the source file information is stored in a network server of a monitoring center and a source admission range is set up; source position information and source file information is acquired at real time and corresponding source information in the network serve is updated at real time; when the source information stored in the network server changes, the monitoring center automatically obtains prompting information and judges whether the change of the source information is beyond the admission range; when the change of the source information exceeds the admission range, automatic alarm is carried out. The system realizing the method comprises a positioning terminal assembly device, a source information storing device, a source information updating device, a source information monitoring device and a real-time alarm device. The method and the system realize automatic supervision and real-time monitoring of all links of the radioactive source, thereby putting an end to severe security accidents like loss of the radioactive source, etc.

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.