Abstract: A method of communicating provides multi-radio transmission diversity (MRTD). A base station receives downlink measurement reports from a mobile station regarding each of a plurality of downlinks between the mobile station and a plurality of base stations. The base station determines which of the base stations will transmit a selected transmission to the mobile station responsive to the received downlink measurement reports. The base station later receives an acknowledgement from the mobile station receiving the selected transmission. In a disclosed example, each of a plurality of base stations receives the downlink measurement reports. Each of the base stations determines, independent of the other base stations, which of the base stations will transmit the selected transmission.

Abstract: A method of decoding is provided comprising processing iterations. In each processing iteration, there is a first Max-Log-MAP decoding operation giving rise to a systematic error due to the Max-Log approximation, and a first weighting operation to weight extrinsic information from the first decoding operation to be applied as a priori information to the second Max-Log-MAP decoding operation. This is followed by a second Max-Log-MAP decoding operation, also giving rise to a systematic error due to the Max-Log approximation, and a second weighting operation to weight extrinsic information from the second decoding to be applied as a priori information to the first Max-Log-MAP decoding of the next iteration. The weights are applied to compensate for the systematic error due to the Max-Log approximation made in the last Max-Log-MAP decoding operation.

Abstract: A wireless communication system has at least one picocell within a macrocell. A method of communicating in that system includes using a set of predefined cell codes for respectively identifying macrocells. At least one predefined cell code is used for identifying all picocells within a macrocell to the macrocell. A picocell code distinct from the predefined cell codes is used for uniquely identifying a picocell to a mobile station with the macrocell. The mobile station is able to translate between the predefined cell code used by the macrocell to identify all picocells and the picocell code used to uniquely identify the picocell to the mobile station.

Abstract: A wireless communication system (20) allows for using base station router devices (30, 32) for in building communications using a mobile station (22). Automatically registering a base station router device and automatically configuring at least an initial parameter for a frequency, transmit power and definition code of the base station router device facilitates easy installation of such devices. In one example, the initial parameters are determined by a communication server associated with a wireless communication network. In another disclosed example, at least one of the initial parameters is automatically determined by the base station router device.

Abstract: A transmit power control technique within a wireless communication system includes adjusting a transmit power used by a picocell base station unit based upon a position of the picocell within a macrocell. When a picocell base station unit is located relatively close to a macrocell base station or center of the macrocell, the transmit power of the picocell base station unit is increased to avoid downlink interference from the macrocell base station for mobile stations communicating within the picocell. When a picocell base station unit is located relatively close to an edge of a macrocell, the transmit power of the picocell base station is decreased to avoid interference caused by the picocell base station unit for mobile stations communicating within the macrocell in the vicinity of the picocell.

Abstract: A system to communicate digital data symbols with higher than QPSK modulation comprises a transmitter and receiver. The transmitter comprises, a modulator and circuitry to split and encode the data into a first block of more significant bits and a second block of less significant bits for modulating by. The receiver receives digital data bits by iterative determination of soft estimates of bits followed by a hard decision as to what bit was intended, and comprises a first processor to provide first soft estimates of bits of the received signal, and a second processor to decode the first soft estimates and to provide second soft estimates of the bits.

Abstract: A radio telecommunications receiver operates to receive digital data symbols or bits by iterative determination of soft estimates of symbols or bits followed by a hard decision as to what symbol or bit was intended. The receiver comprises a first processor operative to provide first soft estimates of symbols or bits of the received signal and a second processor operative to decode the first soft estimates and to provide second soft estimates of the symbols or bits. The receiver also comprises a combiner operative to provide third soft estimates back to the first processor for subsequent further decoding, the third soft estimates of each symbol or bit being dependent upon the respective second soft estimate and a respective previous second soft estimate.

Abstract: A method of communication of data in a mobile telecommunications network involves at a transmitter first grouping the data into a first sequence of bits and a second sequence of bits. There is then a step of modulating a signal with the bits of the first sequence so that the bits of the first sequence have a first level of communication error protection provided by the modulation and with the bits of the second sequence so that the bits of the second sequence have a second level of communication error protection provided by the modulation less than the first level of communication error protection. The signal is then transmitted. At a receiver, estimates of the bits of the first sequence from the signal are detected and contributions to the signal corresponding to the estimates are determined and cancelled from the signal so as to produce a modified signal. Estimates of the bits of the second sequence are then detected from the modified signal.

Abstract: A radio telecommunications system is provided operative to communicate digital data symbols with higher than quadrature phase shift keying (QPSK) modulation. The system comprises a transmitter (1) and a receiver (2). The transmitter (1) comprises a modulator (d) and means (a, b, c, □) to split and encode the data into a first block of more significant bits of symbols and a second block of less significant bits of the symbols for modulating by the modulator (d). The receiver (2) is operative to receive digital data bits by iterative determination of soft estimates of bits followed by a hard decision as to what bit was intended. The receiver (2) comprises a first processor (3) operative to provide first soft estimates of bits of the received signal, and a second processor (13) operative to decode the first soft estimates and to provide second soft estimates of the bits.

Abstract: A radio telecommunications receiver operates to receive digital data symbols or bits by iterative determination of soft estimates of symbols or bits followed by a hard decision as to what symbol or bit was intended. The receiver comprises a first processor operative to provide first soft estimates of symbols or bits, of the received signal and a second processor operative to decode the first soft estimates and to provide second soft estimates of the symbols or bits. The receiver also comprises a combiner operative to provide third soft estimates back to the first processor for subsequent further decoding, the third soft estimates of each symbol or bit being dependent upon the respective second soft estimate and a respective previous second soft estimate.

Abstract: To reduce interference between physically close base and mobile stations belonging to uncoordinated systems of different operators, in a cellular time division telecommunications system, e.g. the TDD mode of UMTS, a method of operation comprises providing a sequence of time frames, each time frame including a plurality of time slots, each time slot having an allocated uplink or downlink channel, wherein the positions of said time slots of said channels are changed in consecutive time frames of said sequence according to a deterministic sequence, e.g. a cyclic rotation. In an initial set up operation, the base station may instruct a mobile station to transmit or receive in certain time slots, and that these time slots should be changed in succeeding frames according to a predefined algorithm transmitted to the mobile station.

Abstract: In a UTRAN operating time division duplexing, one time slot 22(11) in each frame is maintained in a no-transmit condition, all preceding time slots 22(1) to 22(10) being uplink time slots and all succeeding time slots 22(12) to 22(15) being down link time slots (or vice versa). Cell size is markedly increased.

Abstract: In order to double the size of cells for a UMTS/UTRAN system operating in time division mode (TDD) from 3.75 km to 7.5 km, the node B station defines the guard period for a downlink slot followed by an adjacent uplink slot to be longer than the guard period for an uplink slot followed by an adjacent downlink slot, whereby the cell size is extended. Each UE adjusts its timing in reponse to timing deviation signals transmitted at the start of each downlink bust, so as to transmit an uplink burst which arrive at the Node B, at the beginning of the next uplink slot.

Abstract: A time division multiple access cellular radio telecommunications network is disclosed, in which physical channels may be reused in the same cell. Reused channels on the up link are differentiated by a time shift between them. Same cell reuse (SCR) can thus be implemented in a TDMA (GSM) system without assigning different signatures to SDMA users sharing the same physical channel.