A method and related apparatus for transferring data between a mobile communication unit and a plurality of access points, wherein each of said plurality of access points and said mobile communication unit is provided with a transceiver, said mobile communication unit being arranged to travel a predetermined route, the method comprising: adjusting transmission power of at least the transceiver of the mobile communication unit substantially to a maximum level; and attenuating transmission signal of each transceiver such that signal level of a received signal in a transmission between the mobile communication unit and each of the access points is more optimal, wherein the level of attenuation is set constant at least in the mobile communication unit.

A wireless system has a high rate data channel for time multiplexed communications to multiple mobile stations (MSs). Control channels include a forward link common power control channel and reverse link feedback channels for pilot, forward channel quality, and data acknowledgements from each MS. An MS can have an active state for data communications, for which these control channels are used at the full (time slot) rate, or a control hold state, in which acknowledgements are not needed and the others of these control channels can be shared among a plurality of MSs in the control hold state and each using a reduced rate such as , , or of the full rate. The arrangement can support an increased number of active MSs, facilitating an increased total throughput on the high rate data channel, without increasing system resources for the control channels.

A method in a radio network controller (130) is disclosed. The method comprises determining (1204) a decimation factor for a transmit power control (TPC) algorithm, the TPC algorithm comprising a power control algorithm according to which TPC commands for controlling a transmit power of a wireless device (110) are discontinuously transmitted to the wireless device by a network node (115), the decimation factor indicating a predefined number of slots, wherein one out of the predefined number of slots is for transmitting a TPC command to the wireless device; upon determining the decimation factor for the TPC algorithm, modifying (1208) one or more parameters related to TPC to optimize TPC using the TPC algorithm having the determined decimation factor; and configuring (1212) the network node to control the transmit power of the wireless device according to the TPC algorithm and the one or more modified parameters.

A method in a radio network controller (130) is disclosed. The method comprises determining (1204) a decimation factor for a transmit power control (TPC) algorithm, the TPC algorithm comprising a power control algorithm according to which TPC commands for controlling a transmit power of a wireless device (110) are discontinuously transmitted to the wireless device by a network node (115), the decimation factor indicating a predefined number of slots, wherein one out of the predefined number of slots is for transmitting a TPC command to the wireless device; upon determining the decimation factor for the TPC algorithm, modifying (1208) one or more parameters related to TPC to optimize TPC using the TPC algorithm having the determined decimation factor; and configuring (1212) the network node to control the transmit power of the wireless device according to the TPC algorithm and the one or more modified parameters.

An aggressor base station herein performs downlink interference coordination with one or more victim base stations in a radio communication network. Such coordination is performed for each of one or more iterations. For any given iteration, the aggressor sends a message to a victim that indicates, for each of one or more downlink resources, whether the aggressor promises to protect that resource from interference by not transmitting on the resource with a transmit power above a threshold (TH.sub.2). The victim schedules downlink transmissions to one or more user equipments on resources that, according to the message, are protected from interference. Based on monitoring for interference to those transmissions, though, the victim generates and sends to the aggressor feedback that generally requests an increase or decrease of the threshold (TH.sub.2). From evaluation of this feedback, the aggressor determines a new threshold (TH.sub.2) on which promises are to be based in a message to the victim in a subsequent iteration.

Methods, apparatus, and systems are described relating to wireless communications. A base station may transmit a message comprising a subframe allocation bitmap indicating a plurality of subframes. The indicated subframes may correspond to Almost Blank Subframes transmitted by the base station. The base station may transmit a message to a wireless device indicating measurement subframe allocation bitmaps. A first measurement subframe allocation bitmap may exclude the plurality of subframes. A second measurement subframe allocation bitmap may exclude subframes of the first measurement subframe allocation bitmap. These and other features are described.

A method and apparatus for selecting a TFC in a wireless transmit/receive unit (WTRU) is disclosed. The WTRU estimates a transmit power for each of a plurality of available transport format combinations (TFCs). A TFC is selected for an uplink dedicated channel and a TFC is selected for an enhanced uplink (EU) channel. The TFC for the dedicated channel is selected first and independently of the TFC selection of the EU channel. The TFC for the EU channel is selected within a remaining WTRU transmit power after the TFC selection for the dedicated channel.

A method and apparatus for selecting a TFC in a wireless transmit/receive unit (WTRU) is disclosed. The WTRU estimates a transmit power for each of a plurality of available transport format combinations (TFCs). A TFC is selected for an uplink dedicated channel and a TFC is selected for an enhanced uplink (EU) channel. The TFC for the dedicated channel is selected first and independently of the TFC selection of the EU channel. The TFC for the EU channel is selected within a remaining WTRU transmit power after the TFC selection for the dedicated channel.

An embodiment is a method performed by a first wireless device in a wireless network to transmit a multi-power and multi-rate aggregated physical layer service data unit (A-PSDU) to allow low latency transmission in the wireless network. The method includes wirelessly transmitting the multi-power and multi-rate A-PSDU, wherein the multi-power and multi-rate A-PSDU includes a plurality of PSDUs, wherein one or more of the plurality of PSDUs are transmitted using a first transmission power and a first rate and one or more of the PSDUs are transmitted using a second transmission power that is lower than the first transmission power and a second rate that is more robust than the first rate, wherein low latency transmission by other wireless devices is allowed during the transmission of the one or more PSDUs that are transmitted using the second transmission power and the second rate.

An embodiment is a method performed by a first wireless device in a wireless network to transmit a multi-power and multi-rate aggregated physical layer service data unit (A-PSDU) to allow low latency transmission in the wireless network. The method includes wirelessly transmitting the multi-power and multi-rate A-PSDU, wherein the multi-power and multi-rate A-PSDU includes a plurality of PSDUs, wherein one or more of the plurality of PSDUs are transmitted using a first transmission power and a first rate and one or more of the PSDUs are transmitted using a second transmission power that is lower than the first transmission power and a second rate that is more robust than the first rate, wherein low latency transmission by other wireless devices is allowed during the transmission of the one or more PSDUs that are transmitted using the second transmission power and the second rate.