Abstract: A peer-to-peer communication system (1) capable of operating in push-to-talk mode comprises terminals (2, 2A, 6) capable of push-to-talk, peer-to-peer radio communication, and an enhancing device (3) arranged for coupling with the terminal. The enhancing device (3) comprises: • an antenna (31) for transmitting and receiving radio signals, • a band-pass filter (32) for selecting a frequency band of the radio signals, • a bidirectional amplifier (33) for amplifying radio signals alternatingly in a transmitting and in a receiving direction, • a control unit (34) for controlling the bidirectional amplifier (32) in response to a sensor signal, and • a sensor (35) for detecting whether the terminal (2A; 6) is transmitting or receiving and for producing the sensor signal in response thereto, which sensor is galvanically isolated from the terminal. The communication system (1) may be a Terrestrial Trunked Radio system, commonly known as TETRA system, more in particular a TETRA system operating in Direct Mode.

Abstract: A peer-to-peer communication system (1) capable of operating in push-to-talk mode comprises terminals (2, 2A, 6) capable of push-to-talk, peer-to-peer radio communication, and an enhancing device (3) arranged for coupling with the terminal. The enhancing device (3) comprises: • an antenna (31) for transmitting and receiving radio signals, • a band-pass filter (32) for selecting a frequency band of the radio signals, • a bidirectional amplifier (33) for amplifying radio signals alternatingly in a transmitting and in a receiving direction, • a control unit (34) for controlling the bidirectional amplifier (32) in response to a sensor signal, and • a sensor (35) for detecting whether the terminal (2A; 6) is transmitting or receiving and for producing the sensor signal in response thereto, which sensor is galvanically isolated from the terminal. The communication system (1) may be a Terrestrial Trunked Radio system, commonly known as TETRA system, more in particular a TETRA system operating in Direct Mode.

Abstract: A system and method for radio network planning comprises a grid generator and a Monte Carlo analysis module. The Monte Carlo analysis module comprises a snapshot generation module which draws, for each snapshot and for each pixel, a statistical realization from a distribution function relating to slow fading, and a snapshot evaluation module which establishes radio network parameters. The Monte Carlo analysis module further comprises a sub-snapshot generation module which generates at least one sub-snapshot for each evaluated snapshot result, and a sub-snapshot evaluation module (14) for evaluating HSDPA performance parameters based on the sub-snapshot. The sub-snapshot evaluation module (14) comprises a scheduler module (16) which is arranged for scheduling a HSDPA user according to a scheduling scheme.

Abstract: A system and method for radio network planning comprises a grid generator and a Monte Carlo analysis module. The Monte Carlo analysis module comprises a snapshot generation module which draws, for each snapshot and for each pixel, a statistical realisation from a distribution function relating to slow fading, and a snapshot evaluation module which establishes radio network parameters. The Monte Carlo analysis module further comprises a sub-snapshot generation module which generates at least one sub-snapshot for each evaluated snapshot result, and a sub-snapshot evaluation module (14) for evaluating HSDPA performance parameters based on the sub-snapshot. The sub-snapshot evaluation module (14) comprises a scheduler module (16) which is arranged for scheduling a HSDPA user according to a scheduling scheme.

Abstract: The invention relates to a communication system including a first wireless access station with a first data connection for transferring user data and a second wireless access station with a second data connection for transferring user data. The first wireless access station and second wireless access station are located at distant positions from each other. The first wireless access station has one or more antennas for wirelessly transmitting user data that are received over the first data connection to a user terminal. The second wireless access station is configured to receive user data over the second data connection and to transmit the user data directly to the first wireless access station for transmission to the user terminal. The communication system further includes a controller configured for controlling at least a part of the user data for the user terminal to flow over the second data connection.

Abstract: Method and system for planning and/or evaluation of cell capacity in (CDMA) radio networks comprising at least one base station that defines at least one cell. Both uplink cell capacity estimations and downlink cell capacity estimations can be made by adding amounts of traffic to the cell until a limiting capacity representative value has been reached.

Abstract: Method and system for planning and/or evaluation of downlink coverage in a (CDMA) radio network. A service area of the radio network can be divided into pixels defined by a grid, and cells can be assigned to the pixels. After assigning pilot power, desired downlink transmission power can be estimated for the cell, which can then be compared to maximum transmission power of the base station. If needed changes in the radio network are to be made, the planning and/or evaluation is restarted.

Abstract: Method and system for the planning and/or evaluation of radio networks, especially CDMA radio networks. The service area of a radio network is divided into pixels after which for each pixel a probability is determined whether it is covered by a cell of the radio network. To account for cell breathing due to traffic changes, the planning involves the calculation of a link budget for each pixel and of a noise rise for each cell.

Abstract: Method and system for the planning and/or evaluation of downlink coverage in a (CDMA) radio network. The service area of the radio network can be divided into pixels defined (a) by the grid (1), and cells (2) can be assigned (b) to the pixels. After assigning (c) the pilot power (3), the desired downlink transmission power (4) can be estimated (d) for the cell (2), which can be compared (e) to the maximum transmission power (5) of the base station. If needed changes in the radio network can be made and the planning and/or evaluation is restarted.

Abstract: Method and system for planning and/or evaluation of cell capacity in (CDMA) radio networks comprising at least one base station that defines at least one cell. Both uplink cell capacity estimations and downlink cell capacity estimations can be made by adding amounts of traffic to the cell until a limiting capacity representative value has been reached.

Abstract: Method and system for the planning and/or evaluation of radio networks, especially CDMA radio networks. The service area of a radio network is divided into pixels after which for each pixel a probability is determined whether it is covered by a cell of the radio network. To account for cell breathing due to traffic changes, the planning involves the calculation of a link budget for each pixel and of a noise rise for each cell.