Abstract: Techniques to determine a set of rates for a set of data streams to be transmitted in a multi-channel communication system. A group of transmission channels to be used for each data stream is initially identified. An equivalent system for each group is then defined to have an AWGN (or flat) channel and a spectral efficiency equal to the average spectral efficiency of the transmission channels in the group. A metric for each group is then derived based on the associated equivalent system, e.g., set to the SNR needed by the equivalent system to support the average spectral efficiency. A rate for each data stream is then determined based on the metric associated with the data stream. The rate is deemed to be supported by the communication system if the SNR required to support the data rate by the communication system is less than or equal to the metric.

Abstract: In wireless communications, a method and system for enhancing signal decoding capability in null areas uses dithering to break up or modify the null areas. The null areas form in overlapping regions of the beams of two antennas or in overlapping regions of a single signal that is subject to multipath. Dithering is used to spread the null areas over a wider region so that a WTRU in an overlap region will not statically remain within a null area.

Abstract: A transmitter directed, distributed receiver using path diversity provided by the distribution of the receiver. Advantage is taken of the uncorrelated variations over time in the condition of channels between a common transmitter and several users. The greater the variation in the channel condition of a particular channel over time, the greater the increase in total system throughput provided. An access metric represents the instantaneous channel condition of the communication system between each user and the transmitter with respect to the average channel condition of each channel. Alternatively, the access metric represents the instantaneous channel condition with respect to the average data throughput over that channel. The common transmitting station uses the access metric to directly compare the desirability of granting each channel access with the desirability of granting each other channel access. The user that has the greatest access metric is provided access to the channel.

Abstract: The system for providing location independent uniform service access for communication subscribers provides the capability to dynamically translate the local communications access paradigms to enable the subscriber to access the desired communications services without manually translating these access modalities from those known by the subscriber in their home service area to those used in this new locale. The implementation of the present system for providing location independent uniform service access for communication subscribers is illustrated as being resident in the subscriber's communication network access device.

Abstract: Countries or regions of the world can have different regulations governing wireless devices. A client product advantageously conforms to any regulatory environment, thereby allowing the client product to operate permissibly in any wireless network. The client product scans all frequencies at a predetermined interval for explicit information on regulation-conformant methods of operation, including frequencies and output power levels. If the client product receives a beacon, then the client product extracts relevant information from the beacon. Based on the relevant information, the client product operates in either the infrastructure mode or the ad hoc mode. On the other hand, if the client product does not receive explicit information, the client product detects other types of information and implicitly derives methods of operation in both infrastructure and ad hoc modes that conform to local regulations.

Abstract: 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).

Abstract: Circuitry to transmit an analog data signal over a wireless communication link includes a receiver that receives a data signal, an automatic gain control circuit that keeps a peak amplitude of the data signal substantially constant and within a predetermined linear amplification range, and a transmitter, having the predetermined linear amplification range, that receives the data signal from the automatic gain control circuit and that outputs the data signal.

Abstract: The present invention provides a controller for use with a transceiver in a wireless communications network. In one embodiment, the controller includes a sensing system that senses, perhaps periodically, at least one characteristic associated with at least two channels of the wireless communications network. The controller further includes a modification system that updates channel information in a channel information table associated with the at least two channels based on the at least one characteristic. The controller still further includes a selection system that selects channels in accordance with the channel information.

Abstract: A system for wireless communications is provided. The system includes a hand-held wireless communications device, such as a cell phone. An antenna is connected to the cell phone. The antenna radiates radio waves over an area of less than 360 degrees of arc, such as in a cardioid or hemisphere. The antenna is oriented such that hemisphere is in the direction away from a head of a user of the cell phone.

Abstract: A system (10) for transferring an address list includes a portable wireless electronic device (12). A wireless communication system (16) is capable of establishing a wireless communication link (14) with the portable wireless electronic device (12). A wireline communication network (18) is connected to the wireless communication system (16). A computer (20) is connected to the wireline communication network (18). The computer (20) contains an address software that sends a plurality of addresses to the portable wireless electronic device (12).

Abstract: A method and system is disclosed for reducing interference in a wireless communication system utilizing an antenna array. The antenna array uses one or more signal channels for communicating with one or more mobile terminals. First, at least one channel is assigned as an empty channel in which no desired signal is carried so as to provide a representation of all relevant interference. Since the spatial characteristics of the empty channel and the regular signal channels should be very similar, the spatial signature of the signal channels is analyzed based on the interference received on the empty channel and the desired signals received on at least one signal channel. The analyzed spatial signature is then used for reducing the interference on all signal channels.

Abstract: In a cellular video telephone having a built-in battery, the remaining electric power of the battery is detected. The data communication speed and the display of image on a display are variably controlled based on the detected remaining battery power, that is, the communication speed is lowered and the display is turned off, as the remaining power decreases. Alternatively or in addition, the communication speed and the image display are controlled variably based on availability of external power source in the course of voice and image communication.

Abstract: A wireless piconet network device includes a GPS receiver to determine and provide earth coordinates to a gatekeeper of a wireless network so as to provide a level of security to wireless networks which requires accessing wireless devices to be within predefined boundary coordinates. The automatic restriction of access to a wireless network (e.g., a wireless local area network (LAN) such as a piconet network) by requiring a wireless network device to provide earth coordinates (e.g., GPS location information) as part of an establishment or maintenance of a connection to a wireless network, independent of a range of communication of any device in the wireless network. A wireless piconet network device outside of predetermined earth coordinates of a secured area (e.g., a building, a room in a building, a desk in a room in a building, etc.

Abstract: VPI/VCI of an ATM cell is translated into an internal ID by distribute VPI/VCI entries into sections in a table according to a portion of each VPI/VCI entry. A section to be searched according to the portion of a VPI/VCI of the received ATM cell is selected; and a search over the selected section is performed to find an entry corresponding to the VPI/VCI of the received ATM cell. An internal ID corresponding to the found entry is outputted.

Abstract: Using at least one MIMO-capable transceiver allows weighting calculations for signals transmitted and received, and enables individual packets to adapt, in a scalable, flexible, and responsive fashion to the real-world dynamics of a continuously varying communications network environment. The method and system of this invention use adaptively-derived diversity means to rapidly and efficiently distinguish the desired signal from noise, network interference, and external interference impinging on the network's transceivers and can transmit with lessened overhead. ADC operations and signal transformations continuously update combiner weights to match dynamically-varying environmental and traffic conditions, thereby continuously matching necessitated signal and waveform transformations with environmental and signal effects and sources.

Abstract: A digital broadcasting system and a method of processing data are disclosed, which are robust to error when mobile service data are transmitted. To this end, additional encoding is performed for the mobile service data, whereby it is possible to strongly cope with fast channel change while giving robustness to the mobile service data.

Abstract: A transmitting system and method therein are disclosed, by which mobile service data is received and processed. The transmitting system includes an encoder, a signaling encoder, a group formatter, a transmission unit. The encoder encodes mobile data and the signaling encoder encodes signaling information. The group formatter forms data groups having the encoded mobile and signaling information. The data groups have a plurality of data blocks and specific data blocks of the plurality of data blocks include known data sequences. The transmission unit transmit broadcast signal including a parade that includes a collection of data groups having same FEC parameters. And the signaling information includes information identifying the parade and first assigned data group number for the parade to which a first assigned data group belongs.

Abstract: A method of processing broadcast data in a broadcast transmitting system includes Reed-Solomon (RS) encoding and cyclic redundancy check (CRC) encoding enhanced data bytes; converting the RS-CRC encoded enhanced data bytes into enhanced data bits; encoding each of the converted enhanced data bits with one of a first coding rate and a second coding rate, thereby outputting data symbols; first interleaving the data symbols; converting the first interleaved data symbols into data bytes; forming a first data group including enhanced data corresponding to the converted data bytes; deinterleaving data of the first data group; outputting enhanced data packets including the deinterleaved data of the first data group; multiplexing the enhanced data packets with main data packets including main data; second interleaving data of the multiplexed data packets; and trellis encoding the second interleaved data.

Abstract: A frame generating apparatus accommodating a client signal in an optical data transfer unit frame with a higher bit rate than the client signal includes a deserializer, a plurality of generic mapping procedure circuits, and a serializer. The deserializer deserializes the client signal into parallel signals, the number of parallel signals corresponding to the number of tributary slots used in the optical data transfer unit frame. The plurality of generic mapping procedure circuits inserts data and stuff into a frame accommodating portion of the optical data transfer unit frame based on a difference in the bit rate between the client signal and the optical data transfer unit frame. The serializer serializes the parallel signals output from the plurality of generic mapping procedure circuits.

Abstract: A method of mapping symbols of a physical control format indicator channel (PCFICH) is described. A start position of a resource element to map the symbols for the PCFICH is determined by flooring a value, obtained by multiplying the number of resource blocks by a variable proportional to a symbol index for the PCFICH and then dividing the multiplied result by 2, wherein the resource blocks are transmitted in downlink. The symbols are mapped in the start position. Therefore, a problem of wasting resource elements or not being able to implement mapping can be solved by applying a simple mapping rule while mapping symbols of the PCFICH.