Telefonaktiebolaget Lm Ericsson (publ)

Torbjorn Karlsson

Roland Carlsson

Transmission unit comprising a first unit (CM_SCHDR) receiving scheduled first data (DATADATA) for transmission on at least a first channel, a power control unit (PWR_CTRL) for the first channel responsive to a respective closed loop power regulation signal (TCP_CMD), under which at least the transmit power rate of change is limited to a predetermined value per time unit, a packet data scheduler (HS_SCHDR) scheduling second data packets (DATA), such as HSDPA data. A permitted power (P_PERM(t)) is defined as the maximum value of either the actual power of a previous instance (P_HS(t&#x2212;1)) added with the predetermined value (d) or the determined possible power (P_POS(t)). Moreover, an available power is resolved. According to one aspect, the scheduling is performed within these limits. According to a further aspect the power level of the signaling and control channel (HS-SCCH) is further regulated during a transmission interval taking account of shared packet data channel (HS-PDSCH) power level.

Power control for high speed packet data transmission

A transmitting unit comprising a first unit (CM_SCHDR) receiving scheduled first data (DATA, DATA) for transmission on at least a first channel, a power control unit (PWR_CTRL) for the first channel responsive to a respective closed loop power regulation signal (TCP_CMD), under which at least the transmit power rate of change is limited to a predetermined value per time unit, a packet data scheduler (HS_SCHDR) scheduling second data packets (DATA), such as HSPDA data, for transmission on at least a second channel at an actual power level (P_H(t)), and a power amplifier (POWER_AMP) amplifying and outputting the scheduled first and second data, whereby the outputted first and second channels are subject to interference from one another, is shown. A possible power (P_POS(t)) is determined at a given instance as the maximum value of either the actual power (P_HS(t&#x2212;1)) at a previous instance or the possible power determined at a previous instance (P_POS(t&#x2212;1)), decreasing the maximum value by a predetermined value (d). Moreover, a permitted power (P_PERM(t)) at a given instance as the maximum value of either the actual power of a previous instance (P_HS(t&#x2212;1)) added with the predetermined value (d) or the determined possible power (P_POS(t)). Finally, the scheduling is performed within these limits.

A system and a method reduce interference in a cellular communication system including at least one controlling arrangement communicating with a number of base stations, each of which serves a cell, and a number of mobile stations controlled by the base stations. Each base station includes a detecting device for detecting interfering signals from one or more mobile stations controlled by other base stations. The base stations also include an alarm activating device for activating the transmission of an alarm signal if interference is detected. The controlling arrangement includes a device for requesting identification of all mobile station in the neighborhood of the interfered base station. A device is also provided for establishing by which base station an interfering mobile station is controlled, and the base station controlling the interfering mobile station takes the appropriate action to reduce the interference level.

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Lindome, Sweden

Torbjorn Karlsson