| 摘要 |
The invention relates to a digital TDMA/FDMA (Time Division Multiple Access/Frequency Division Multiple Access) cellular network system, comprising (i) base stations (11) forming radio cells (C1 to C62), each of said base stations having a determined static frequency of a control channel of the cell and comprising a first transceiver (TRX1) transmitting continuously control data of the system concerning said cell at said control channel frequency at least in one predetermined time slot (TSO) of a TDMA frame (40), the TDMA frame of said first transceiver including traffic channels at least in a part of the other time slots, and at least one second transceiver (TRX2...TRX4) for the traffic channels, and (ii) mobile stations (12) connected to the base stations (11) via a radio path. To provide a system suitable for a microcellular network and to maximize the advantage to be gained from interference diversity, the traffic channels of said second transceiver units (TRX2...TRX4) use frequency hopping at least in a part of the radio cells in such a way that, on those traffic channels aligned with the predetermined time slots (TSO) of the control data of the cell in said first transceiver (TRX1), substantially all frequencies of the available frequency band, except said control data transmission frequency determined for the cell, belong to the hopping sequence, and on those traffic channels which are in the other time slots, (TSN, N NOTEQUAL 0), substantially all frequencies of the available frequency band belong to the hopping sequence. |
