67results about How to "Increase user capacity" patented technology

The present invention utilizes adaptive antenna arrays at a base station to increase the forward link capacity of mobile data systems. One or more simultaneous forward link beams are formed and are switched (or hopped) in a time division manner among subscribers. The beam hopping sequence is randomized by varying the time slot and/or carrier frequency of each subscriber. In space-time hopping, the position within a frame of the time slot for each subscriber is varied in a pseudo random sequence. In space-frequency hopping, the carrier frequency for each frame is varied in a pseudo random sequence. The pseudo random beam hopping sequence provides a gain due to interference diversity in addition to the antenna array gain. Forward link beam forming algorithms use space-time or space-frequency hopping to increase the capacity of mobile data systems.

A divider/combiner unit combines RF signals, then converts the combined signal into an optical signal and sends it over an optical fiber. N radio access units each convert the optical signal received from the optical fiber into an RF signal and transmits it from an antenna, and each radio access unit converts an RF signal received by the antenna into an optical signal and sends it over an optical fiber to the divider/combiner unit. The divider/combiner unit converts the received optical signal into RF signals and outputs them. This system is operated as plurality of communication systems in common to them in correspondence to a plurality of input/output terminals of the divider/combiner unit.

A messenger strand mounted low-power pico-cell radio, having its own environmentally controlled box, mounted on utility messenger strands, connects to the cable using the Internet protocol (IP) for back-haul, and has in-band monitor and control capability. These pico-cell radios also receive power through the same cable connection. The configuration control and monitoring is by independent discretely-managed internal mechanisms that can be remotely addressed. These internal mechanisms include the modem for backhaul, wireless radio transceiver(s), and the system management device for operation, administration, maintenance, and control. Such pico-cell radios help to provide wireless connectivity and coverage efficiently by reducing dark spots in wireless coverage. Distributing these radios in reasonable, close proximity enables wireless coverage in difficult terrains, where current high power systems fail. The radios disclosed herein eliminate the need and cost for additional power lines and IP connection lines, and are therefore easy to install and maintain.

A system and method for controlling operations in a cellular system is disclosed. A serving cell or the mobile telephone switching office (MTSO) determines that a portable wireless device operating in a serving cell needs to be handed off (a “handoff”). The position of the portable wireless device is determined. The position may be determined based on any of a variety of localization techniques, such as time difference of arrival (TDOA), angle of arrival (AOA), location pattern matching (LPM), global positioning system (GPS), or other localization techniques. A target cell is selected based on the position of the portable wireless device. Generally, the target cell is selected as the cell that is closest to the portable wireless device. Factors such as a position vector and/or a velocity vector may be assessed in selecting the target cell. Based on the target cell that is selected, the MTSO assigns the portable wireless device to the target cell and the transmission is handed off to the new cell.

The invention discloses a broadband mobile communication method based on a multi-beam GEO satellite. The broadband mobile communication method based on the multi-beam GEO satellite mainly comprises the steps that spot beams at the Ka frequency band are adopted by NG+1 bidirectional feed links between a satellite-borne device and a ground station device, so that space division multiplexing is achieved for NG+1 times; a cellular network with NB cells is formed through NB bidirectional user links between the satellite-borne device and NT mobile user terminals based on an NB-beam satellite antenna, and space division multiplexing is achieved for NB/4 times with every four cells as a group, so that a 260 MHz bandwidth resource can be shared. The invention further discloses a broadband mobile communication system based on the multi-beam GEO satellite. According to the broadband mobile communication method and system based on the multi-beam GEO satellite, any one of the NT mobile user terminals can serve as an independent multimedia communication terminal as well as a local area network connected with a public Internet and can have access to a remote URL through the satellite links of the system, and an Internet service on the level similar to the 4G mobile communication level can be provided for a large number of people on various vehicles.

A high-directivity transponder system uses a dual system of a retrodirective array transmitting a data signal peak toward an interrogator source, and a self-null-steering array transmitting a null toward the interrogator source and a jamming signal elsewhere, resulting in high S/N reception at the interrogator source and avoidance of interception. Integrating modulators would allow each array to transmit different data while the spectra of the transmitted signals are identical, thus disabling interception. The system enables secure point-to-point communications and can be used for short-distance wireless data transmission systems such as wireless LAN and RFID servers. As another aspect, self-steering signal transmission is employed for randomly oriented satellites using circularly polarized, two-dimensional retrodirective arrays. Quadruple subharmonic mixing is used as an effective means of achieving phase conjugation when a high-frequency LO is not feasible or inapplicable. These features may be used for small-satellite communications, secure tactical communications, search and rescue, enemy location fixing and tracking, UAV command and control, forest fire detection, marine-based tracking, and many other applications requiring secure communications with high signal directivity.

A method, system, and functional elements for transmitting cell management information in a cellular communication network, in which each cell comprises a base station communicating using at least one frequency and is defined by a radio coverage area of its base station, wherein a communication between a mobile station and a base station is based on a time frame structure comprising a plurality of time slots, in which transmitting time slots in the time frame structures of neighboring base stations, in which time slots cell management information relating to the respective cell is to be transmitted, are shifted against each other on a time basis. The transmitting of cell management information can be based on a predetermined transmission parameter, the value of which is representative of the radio coverage area of a base station.

The invention discloses a swimming pool drowning alarm device which consists of a drowning detection device A, a handhold alarm device B and a computer data processing unit. The drowning detection device A is worn on the head of a swimmer, the handhold alarm device B is used by the lifeguard, the computer data processing unit C is used by the management personnel of the swimming pool. Under normal condition, the drowning detection device A sends signals to the handhold alarm device B and the computer data processing unit C at fixed time. When the head of the swimmer is immerged into the water, the drowning detection device A does not send any signal, a timing circuit of the drowning detection device A and the handhold alarm device B as well as the computer data processing unit C is started, the swimmer is judged as the drowning if the given time reaches and the swimmer still does not come out from water. At this time, the drowning detection device A flashes and flickers to display the position of the drowner, the handhold alarm device B and the computer data processing unit C make a sound-light alarm to remind the crowd around, the lifeguard and the management personnel of the swimming pool to implement rescue to the drowner.

An Internet access system includes a wireless local area network having wireless access points and a rental control station connected to the wireless local area network, the rental control station including a network access script generator for generating a network access script, a network access database, and a data input unit, and a wireless station adapter synchronizable to communicate with the access point after having been automatically installed and configured in a communication device by the network access script.

The present invention discloses a community users communication method based on the orthogonal frequency division multiplexing, including carrying out the grouping handling to users in each community in the orthogonal frequency division multiplexing mobile communication system; and making different groups users in the community occupy different time domain symbol resources to process the communication data transmission. Accordingly the present invention also discloses a community users communication system based on the orthogonal frequency division multiplexing. The present invention can reduce interference between users in one community and interference between communities in the mobile communication system.

A computer node (100) connected to a network (N) is associated with a collection of data files (F1, . . . , Fm) adapted to be supplied to user terminals (T1, T2) for playback/display therein. The node (100) receives user requests (R) from user terminals (T1, T2) via a request input interface (110). Each request (R) identifies a requested data file (F1) in the collection of data files (F1, . . . , Fm). In response to and based on each such request (R), a control unit (120) derives at least two basic request components (r1, r2, r3). Each basic request component (r1, r2, r3) reflects a respective set of features characterizing specific aspects of a playback/display capacity of the user terminal (T1) from which the user request (R) was originated. Based on the at least two basic request components (r1, r2, r3), the control unit (120) also executes a playback/display capacity algorithm containing at least two consecutive steps. Based on a result of the of the algorithm, the control unit (120) derives a composite playback/display capacity (C_τ-tot) of the user terminal (T1); selects (v_ID) a version (F1vi) of the requested data file (F1) which version (F1vi) matches the composite playback/display capacity (C_τ-tot) in respect of the particular contents of the file (F1); and causes forwarding of the selected version (F1vi) of the requested data file (F1) to the user terminal (T1).

The invention discloses a system capacity expansion method based on a D2D communication model in an ITS. The method comprises a first method for conducting cooperative information transmission dispatching and bandwidth resource allocation among road test base stations, wherein RSU cooperative communication is applied to an Internet of Vehicles system, efficient cooperative allocation of communication channel bandwidth resources is realized through return cascading of RSUs, an efficient transmission dispatching protocol is adopted in the bandwidth resource allocation process, and the protocol is that each RSU can release corresponding wireless spectral bandwidth resources in time when vehicle nodes are transferred out of the coverage of the base stations and the RSUs can reserve the spectral bandwidth resources to be switched to the vehicle nodes in advance when the vehicle nodes are transferred in the coverage of the base stations; a second method for expanding capacity through adaptive signal power control, wherein a disperse power allocation method based on a bit allocation algorithm is adopted, that is, bit rates of all carriers are distributed adaptively according to the real-time states of subcarrier channels, and a corresponding power allocation algorithm is adopted for adaptive adjustment of transmitting power.

A system of frequency allocation for a user access local area network, and uplink and downlink transmission methods thereof are provided. The system of frequency allocation for a user access local area network comprises: an information processing apparatus, a switch, a plurality of first modulators, a broadband high frequency synthesizer, a downlink amplifier, a plurality of trunk splitters, a plurality of branch splitters, a plurality of user terminal digital high frequency demodulators, a plurality of user terminal modulators, a plurality of trunk mixers, a plurality of branch mixers, an uplink amplifier, a broadband high frequency allocator and a plurality of first demodulators. The present invention uses a new communication resource configuration technology with high transparency in which every user is provided with his dedicated communication channel regardless of its busy/idle status. In addition, the present invention adopts a new physical layout construction of the user access LAN with a high frequency broadband, a high speed, and a large capacity in which passive operations without relay amplification can be achieved in the main trunk. Therefore, the seamless communication resource utilization is achieved, and the operation and communication service technology is provided which is suitable to the operation custom of the public so as to be easily learned and propagation.

The embodiment of the invention discloses a method, device and system for distributing user bandwidth in Internet protocol television (IPTV). The method for distributing user bandwidth in IPTV comprises the following steps of: receiving a service request sent by user equipment; judging whether the required bandwidth of a service in the service request surpasses the current access bandwidth of the user equipment; if the required bandwidth of the service surpasses the current access bandwidth of the user equipment, sending a request on distributing the required bandwidth of the service to network access equipment; and receiving the bandwidth distributed by the network access equipment according to the request on distributing the required bandwidth of the service. By adopting the scheme, distribution of a large quantity of fixed-bandwidth resources to each IPTV user is not required, so that idling of the bandwidth resources can be reduced effectively and flexible distribution of the overall bandwidth resource of the system is realized. Under the condition that the overall bandwidth resource is not changed, services of higher levels can be realized or the user capacity of an IPTV system is further increased.

Codes are applied to signals to reduce the number of transceivers and associated RF cabling extending from base electronics to antenna array electronics in a base station providing beam forming. The transceivers can be reduced to as few as one, and the RF cabling can be reduced to none. The codes may be orthogonal codes, such as Walsh codes. The codes are applied: to weights used to produce the beam forming, signal being transmitted or received, or both. The codes are applied a second time to decompose the coded weights/signal to associate the weights and signal with the beam forming. The coded weights/signal can be summed, including with other coded weights/signals, to produce a composite code division multiplexed signal for transmission between transceiver(s) and antenna array electronics over a single RF or non-RF cable spanning between the base electronics and array electronics. The complexity, size, and cost of electronics and cables are reduced, and calibration of transceivers and demodulators can be eliminated.

The invention belongs to the technical field of wireless communication, and in particular a multi-user iteration soft detection device and method based on the optimal Bayesian. A free space laser communication transmission and receiving system mode based on the IDMA is adopted by the method, a signal is transmitted after being encoded by a forward encoder and interleaved and modulated by an interleaver at a transmitter, and then prior information of the received signal is updated by use of the optimal Bayesian multi-user soft detection algorithm through the ESE and DEC decoder in a receiver; the multi-user interference is reduced, and the iteration soft demodulation of the signal is realized. The device disclosed by the invention comprises two parts: the free space laser communication transmitter and the free space laser communication receiver based on the IDMA. The device has good inhibition effect to the multi-user interference, and can resist the impact from the atmosphere turbulence to some extent, and can be extensively applied to the high speed data transmission scene in the networking of the Internet of Things.

The invention relates to a maritime wireless communication system and communication networking method, comprising a communication-in-moving system and a shore-based mobile communication base station. The communication-in-moving system is distributed on a ship, the ship is a link node, and the communication-in-moving system is composed of a terminal system, a control and routing module, a relay system, a WIFI module and a global positioning system. The communication-in-moving system distributed close to the shore achieves a communication ad-hoc network with the shore-based mobile communication base station, and via the control and routing module, links a terminal base-band module of the terminal system to a relay base-band module of the relay system, and the relay system continues to cover areas with no signals. Via a multi-node link mode, a maritime ad-hoc network is finally achieved, and a communication channel between the shore and the sea is built. The maritime wireless communication system and communication networking method are advantageous in that, though the ad-hoc network mode, and combination of the shore-based mobile communication base station, sea-shore communication for a maritime operator is achieved.

The invention relates to a seaborne wireless communication system based on Beidou positioning and a communication networking method. The system comprises satcom on the move hardware platforms and a shore mobile communication base station. The satcom on the move hardware platforms are arranged on ships and the ships are link nodes. Each satcom on the move hardware platform comprises a satcom terminal antenna, a wireless terminal module, a control module, a wireless relay module, a Beidou module and a wireless local coverage module. The satcom terminal antennas for receiving surrounding base station signals establish connection with the shore mobile communication base station in an automatic search mode. The satcom terminal antennas are connected with the wireless terminal modules. The wireless terminal modules are connected with the wireless relay modules, the Beidou modules and the wireless local coverage modules through the control modules. The wireless relay modules are independently connected with relay antennas. The Beidou modules are connected with Beidou antennas. According to the system and the method, through combination of the shore mobile communication base station, a seaborne worker can realize shore and sea communication in an ad-hoc network mode.

The invention provides a down dynamic scheduling resource distribution method, device and base station for a VOLTE service. The method comprises the steps of obtaining a first count value of user equipment (UE) which is equal to or larger than a first preset value in number of continuous down subframes, wherein the service type of the UE is voice service, and the down transmission mode of the UE is the TM3 mode; judging whether the first count value is larger than a second preset value, if yes, adopting the down control information format DCI 1A for conducting resource scheduling on the UE, otherwise, determining the DCI format adopted for conducting the down scheduling according to the adaptive algorithms of the TM3 mode, and conducting resource scheduling on the UE according to the determined DCI format. By means of the down dynamic scheduling resource distribution method, device and base station for the VOLTE service, use of PRB resources by voice users at good points and medium points is reduced, waste of channel resources is lowered, and the user capacity of the base station and the using efficiency of unoccupied resources are raised.

A bowl-type waterslide assembly includes a sliding lane, an inlet having a first radial form and allowing a rider to access the bowl-type waterslide assembly, an outlet having a greater slope than the inlet and having a second radial form, a path allowing the rider to slide, and having a curved form and configured to provide a non-stop travel between the inlet and the outlet, a wall element in an omega form configured for partitioning the path into a plurality of separate sections. A water distribution part is configured to provide water to the bowl-type waterslide assembly, the water distribution part is provided above the omega form of the wall element and extends through the wall element in a groove form.

The invention discloses a vector DSL (Digital Subscriber Line) method, a system and single boards, which relate to the DSL data processing field and used to enlarge the user capacity of the vector DSL system. The vector DSL method includes the steps that at least one single board receives and processes own user data in advance; the single board transmits the own user data to an auxiliary processor on the single board for inner vector processing to obtain inner processing data; the single board transmits the user data to a centralized vector processor for external vector processing to obtain external processing data; and the single board receives the external processing data of the single board and combines the inner processing data for a later stage processing.

In an automobile on-board and/or portable telephone system capable of increasing the capacity of subscribers easily on the basis of changing of the information transmission bit rate, spread codes obtained by multiplying orthogonal spread codes (m in number) by a pseudo-random noise series are assigned to individual channels in the same cell in such a manner that the orthogonal spread codes are multiplied by some types of pseudo-random noise series having different phases, thereby making it possible to maintain the number of channels in the same cell at a value which is a multiple of the number of the orthogonal spread codes. Through this, in the case where the transmission bit rate is halved as compared to the presently existing rate in the future, assignment of spread codes which are increased in number to as large a value as necessary can be achieved and the subscriber's capacity can be increased within a range in which the necessary quality can be maintained even when link paths for m or more channels are set up in one cell from the viewpoint of Signal to Interference Ratio.

In an automobile on-board and/or portable telephone system capable of increasing the capacity of subscribers easily on the basis of changing of <INS-S DATE="20011023" ID="INS-S-00001">the <INS-E ID="INS-S-00001">information transmission bit rate, spread codes obtained by multiplying orthogonal spread codes (m in number) by a pseudo-random noise series are assigned to individual channels in the same cell in such a manner that the orthogonal spread codes are multiplied by some types of pseudo-random noise series having different phases, thereby making it possible to maintain the number of channels in the same cell at a value which is a multiple of the number of the orthogonal spread codes. Through this, in the case where the transmission bit rate is halved as compared to the presently existing rate in the future, assignment of spread codes which are increased in number to as large a value as necessary can be achieved and the subscriber's capacity can be increased within a range in which the necessary quality can be maintained even when link paths for m or more channels are set up in one cell from the viewpoint of Signal to Interference Ratio.