777 results about "Base transceiver station" patented technology

A Mobile Station (MS) is able to vertically roam in either direction between two different network, i.e. WWAN and WLAN. The MS is equipped with a dual mode Radio for WWAN and WLAN transmissions. The WLAN Radio is linked to a WLAN Enterprise Gateway Controller (EGC) via a first air link and the WWAN Radio is linked to a WWAN Base Transceiver Station (BTS) via a second air link. The EGC is connected to a Mobile Switching Center (MSC) which is in turn connected to the BTS. An outgoing VoIP call from the WLAN Radio to a remote party on the WWAN will transition or seamlessly switch over to a WWAN connection when the MS detects packet error rates, frequent scale back or consistent signal degradation. Upon such conditions, the WLAN Radio requests the EGC to request an Explicit Call Transfer via the MSC to the MS integrated WWAN Radio portion which automatically accepts the call based on referenced information stored in the user's subscriber identification module (SIM). Once the WWAN Radio is confirmed connected to the remote party on the WWAN, the WLAN Radio drops the WLAN connection. An incoming call between the MS and a remote user via the WWAN will transition to the WLAN Radio when the MS enters WLAN coverage. The MS issues an ECT to the WLAN. After user verification by the WLAN Radio and the EGC signals acceptance of the call, the WWAN Radio connection is dropped and the call is now established between the WLAN Radio and the remote party on the WWAN.

Telephone calls between a mobile station (MS) and the mobile network or PSTN are routed through the Internet via VoIP using a femtocell, as opposed to the traditional macrocellular network. The femtocell can comprise a USB Transceiver Station that is connected to a personal computer through a universal serial bus port, which provides both power and a multi-megabit per second connection between the personal computer and the USB transceiver station. The USB transceiver station can comprise a microcontroller to manage signaling between the RF front end/baseband processor and the personal computer, as well as a precise timing mechanism to assist the synchronization of femtocell timing with the surrounding macrocellular network, if it is present. The USB transceiver station can have a compact form factor that that facilitates a high degree of portability by the subscriber, such as being readily attachable to their keychain.

A system and method is disclosed for increasing the efficiency of a cellular communication network, reduce ongoing operating costs and increase revenue. According to one aspect, a method is disclosed for increasing the efficiency of a cellular communication network whereby network capacity in the radio access network (RAN) and baseband processing for wireless connections are dynamically adjusted to automatically provision sufficient bandwidth and baseband processing capacity in response to changes in the network. The method is further extended by implementing policy management which allows wireless carriers to develop and implement network based policies to automatically increase or decrease the amount of processing resources and network bandwidth required from any cell site, hub or mobile switching office. According to another aspect, network efficiency is enhanced by utilizing a novel cellular network infrastructure. RF signals from cell site antennas of various technology types are demodulated, digital bit information is extracted from the RF signals, processed, and groomed into Gigabit Ethernet/Resilient Packet Ring (GigE/RPR) or Ethernet over copper traffic flows using specific Quality of Service (QoS) priorities. The GigE/RPR traffic flows are routed to hub sites or mobile switching offices, at which point the packetized information is extracted and converted to RF signals that are equivalent to the signals that were received at the antenna. The RF signals are sent over coaxial cable to a network hub including a pool of Base Transceiver Stations (BTSs) (or Node Bs). The hub is coupled to one or more mobile switching offices via a second fiber optic ring.

A base transceiver station operating a sectorized cell of a cellular radio system operates a plurality of narrow uplink main receive beams, and one or a plurality of uplink diversity received beams. A scanning means scans each of the uplink main receive beams to locate a communications channel on the main uplink beams. A diversity receiver receives a diverse beam signal from the diverse beam(s), which is compared with a beam signal received from a main uplink beam, and the main beam signal from the main beam, or a diverse beam signal from the diversity antenna is selected, depending on the comparative signal to noise ratio and signal strength of the main beam signal and diversity beam signal.

A signal conditioner (SC) and method for performing communications via a shared transport medium between a base transceiver station (BTS) and a remote antenna entity (RAE). A first SC is connected to the BTS and a second SC is connected to the RAE. Each SC interfaces to the transport medium. The first SC receives an RF signal representing a combined digital signal (CDS) from the BTS. The first SC recovers and conditions the CDS, and then transmits the conditioned CDS to the second SC via the transport medium. The second SC receives the conditioned CDS, recovers the CDS, produces an RF signal representing the CDS, and transmits this RF signal to the RAE. The RAE sends this RF signal to an antenna of the RAE for transmission of this RF signal via the antenna. First SC and second SC also facilitate communication of a CDS from RAE to BTS.

A public mobile communications network is configured in accordance with an established protocol which includes a private network portion to which only a selected set of mobile stations have access. The selected set of mobile stations has a private network identity code which is different from a public network identity code. A base transceiver station of the private network portion broadcasts the private network identity code on its broadcast control channel. A mobile switching center prevents public subscriber mobile stations from registering via the private network portion, while the private subscriber mobile stations are allowed to register over the entire network.

A private wireless network is able to provide wireless telecommunication services to subscriber mobile stations that also subscribe to a public wireless network. The private wireless network includes a private base transceiver station (BTS), a private mobile switching center (MSC), and a gateway service control point (SCP). The private BTS provides a private network wireless coverage area within which the mobile station can communicate with the base transceiver station over an air interface. The gateway SCP has a private network database containing private network data records for subscribing mobile stations. A private network data record includes a private network service profile and a private network locator address. The public wireless network has a home location register (HLR) with a public network database containing public network data records for subscribing mobile stations. A public network data record includes a public network service profile and a public network locator address. When a subscriber mobile station is active on the private wireless network, the private network locator address identifies the private MSC, and the public network locator address identifies the gateway SCP. By providing the private network wireless coverage area so that it overlaps the public network's wireless coverage area, the subscriber mobile station may be handed off between the private and public wireless networks.

Systems and methods are described for coordinating transmissions in distributed wireless systems via user clustering. For example, a method according to one embodiment of the invention comprises: measuring link quality between a target user and a plurality of distributed-input distributed-output (DIDO) distributed antennas of base transceiver stations (BTSs); using the link quality measurements to define a user cluster; measuring channel state information (CSI) between each user and each DIDO antenna within a defined user cluster; and precoding data transmissions between each DIDO antenna and each user within the user cluster based on the measured CSI.

A wireless communications adapts its mode of operation between spatial multiplexing and non-spatial multiplexing in response to transmission-specific variables. An embodiment of a wireless communications system for transmitting information between a base transceiver station and a subscriber unit includes mode determination logic. The mode determination logic is in communication with the base transceiver station and the subscriber unit. The mode determination logic determines, in response to a received signal, if a subscriber datastream should be transmitted between the base transceiver station and the subscriber unit utilizing spatial multiplexing or non-spatial multiplexing. In an embodiment, the mode determination logic has an input for receiving a measure of a transmission characteristic related to the received signal. In an embodiment, the mode determination logic includes logic for comparing the measured transmission characteristic to a transmission characteristic threshold and for selecting one of spatial multiplexing and non-spatial multiplexing in response to the comparison of the measured transmission characteristic to the transmission characteristic threshold. In an embodiment, the transmission characteristic includes at least one of delay spread, post-processing signal-to-noise ratio, cyclical redundancy check (CRC) failure, residual inter-symbol interference, mean square error, coherence time, and path loss. By adapting the mode of operation in response to transmission-specific variables, the use of spatial multiplexing can be discontinued in unfavorable conditions. Additionally, because the wireless communications system can adapt its mode of operation between spatial multiplexing and non-spatial multiplexing, the communications system is compatible with both subscriber units that support spatial multiplexing and subscriber units that do not support spatial multiplexing.

A system and method is disclosed for providing concurrent data transmissions in a wireless communication network. The invention comprises a register unit within a base transceiver station that prepares data packets to be transmitted to mobile stations within a plurality of cell sectors. The register unit identifies the cell sector destination of each data packet in a first data call and sends the data packet to a buffer associated with the cell sector destination. The buffers store their respective data packets for each cell sector in a first subframe of a data frame. The buffers send their respective data packets within the first subframe to their respective antennas. The data packets for each cell sector are then concurrently transmitted during the first subframe. Data packets of a second data call are transmitted during the second and third subframe so that two data calls are concurrently transmitted.

A telecommunications system and method for rapid start-up of a Global Position System (GPS) receiver integrated with a mobile terminal is disclosed. The location of a reference GPS receiver associated with a Base Transceiver Station (BTS) within the cell that the mobile terminal is currently located is used as the local position estimate for that mobile terminal. The GSM TDMA frame numbers are first correlated with the GPS clock signal. Optionally, this correlation is adjusted using the adaptive frame alignment mechanism. This local position estimate is used to ascertain the location of the GPS receiver. The correlation data is then sent to the GPS-capable mobile terminal through the Short Messaging Service (SMS) cell broadcast facility or the Broadcast Control Channel (BCCH) facility of the GSM network to enable the built-in GPS receiver to calculate its position relatively quickly.

An improved system and method for determining a position of a mobile station in a mobile telecommunications network is disclosed. The system includes a database having geographical information pertaining to the service area of the telecommunications network, including whether service areas therein are characterized as urban areas, suburban areas or "badurban" areas in which radio communication is especially limited. The system further includes a mobile location center (MLC) which, among other things, calculates the number of access signal bursts which are required for transmission by the mobile station to be located. The access burst number is calculated based upon the geographical information pertaining to the service areas stored in the database and upon a requested position determination accuracy. By measuring the time of arrival delay of the burst signal transmission received by two or more base transceiver stations, the MLC computes the position of the mobile station.

In embodiments of the present disclosure improved capabilities are described for increasing the bandwidth in a large area broadband network, where a scheduler facility, in association with a cellular LTE base transceiver station utilizing an agile beam forming antenna system, schedules communications between the LTE base transceiver station and mobile transceiver devices, wherein the scheduler facility schedules communications with a target mobile transceiver device to take place in one of the m times N RF beams of the agile beam forming antenna system based on a location determination of the target mobile transceiver device within the cell coverage area determined through a location determination algorithm that utilizes at least one of a channel quality indicator (CQI) measurement and a sounding reference signal (SRS) measurement collected through a communicative interaction between the cellular LTE base transceiver station and the target mobile transceiver device.

A communication system and method for extending coverage of a base transceiver station. The communication system includes processing circuitry that receives a communication signal over a wireless channel. The received communication signal is processed through an adaptable equalizer to reduce noise, distortion, interference, and frequency errors. In another aspect of the invention, a frequency of a reference signal in the communication system is adjusted to compensate for frequency errors between the communication system and the source of the communication signal. The equalized and frequency adjusted communication signal is then retransmitted into an extended coverage area. Wireless coverage is thereby provided between a base transceiver station and a mobile device in the extended coverage area.

An improved method for programming a mobile telephone over the air within a mobile telephone communication network is disclosed. The mobile telephone communication network includes an over-the-air function, a customer service center, a mobile switching center, a base station controller, and multiple base transceiver stations. The over-the-air function, using the mobile switching center, the base station controller, and one of the base transceiver stations for transport, initially sends a request over the air to a mobile telephone within the mobile telephone communication network to interrogate the mobile telephone's protocol capability. In response to the request, the mobile telephone sends a protocol capability response message over the air back to the over-the-air function. The protocol capability response message includes a BAND_MODE_CAP field that describes the band and mode capability information of the mobile telephone. In addition, the protocol capability response message may also includes a SERVICE_OPTION field that describes the service options supported by the mobile telephone.

Beamforming techniques to limit radiated power where there is the potential for interference with macro-cellular coverage or with adjacent mobile stations. Smart antenna beamforming techniques (including the use of angle of arrival information) are combined with access probe information to determine the direction for radiated power and the level of the needed transmitted power as well for the small office or home (SOHO) environment. The placement of RF power in the SOHO specific to where it is needed, minimizes radiating power in directions where it will cause interference with macrocell coverage. In addition, the beamforming techniques provide a base transceiver station with an economical method to quickly solve coverage issues internal to a SOHO, without introducing interference external to this coverage environment. In addition, there specific placement of the RF power where it is needed provides an increase in spectral efficiency of a deployed network.

The present invention provides a synchronous demodulation apparatus of a base transceiver station in an Interim Standard-2000 (IS-2000) system, including a first synchronous demodulation unit, a received signal delay unit, an interference signal regeneration unit and a second synchronous demodulation unit. In comparison with an asynchronous demodulation apparatus used in an Interim Standard-95 (IS-95), it is possible for the inventive apparatus to improve a reception function approximately 3dB and ultimately increase the number of subscribers.

A Channel Quality Indicator table for wireless multiple input multiple output (MIMO) networks is disclosed. In one embodiment, a method of generating a table for channel quality indicator (CQI) for an open loop MIMO transmission includes calculating performance of a link between a transmitter and a user end unit for each MIMO transmission mode over a range of average signal-to-noise ratio, and selecting the MIMO transmission mode that maximizes performance for each subset of the range of average signal-to-noise ratio. The method further includes storing the selected MIMO transmission mode and the corresponding subset of the range of average signal-to-noise ratio in a CQI table, the CQI table being stored in an user end unit and a base transceiver station of the open loop MIMO network.

A system and method of providing an adaptive multi-beam capability to a wireless base transceiver station is disclosed. The system comprises a plurality of transmit and receive antenna arrays and a plurality of static beamformers to form a limited number of beams. The beam data is reduced to digital baseband form whereupon it is digitally beamformed using a set of adaptive beamforming weights generated having regard to the form and content of the data and the environment. Such form and content information is obtained directly or indirectly from the base transceiver station. The weights are calculated using an average power function derived from a correlation of the beam data with a reference signal that mimics the training sequence assigned to the base transceiver station. Because the average power does not vary widely from frame to frame, the weights derived from the uplink direction may be reapplied in the downlink direction. Specific provision is made for data packets, where downlink packets may contain control information intended for broadcast to all subscribers.