A wireless device receives a control command instructing the wireless device to transmit a random access preamble on a random access channel of a first cell. The wireless device transmits, overlapping in time with transmission of the random access preamble, an uplink packet on a first subframe of the first cell. Transmission power of the uplink packet is calculated considering a maximum allowable transmission power in the first subframe of the first cell and the transmission power of the random access preamble.

A plurality of cells are grouped into a primary cell group and a secondary cell group. The wireless device receives a timing advance command comprising a time adjustment value and an index of the secondary cell group. The wireless device applies the time adjustment value to uplink transmission timing of the secondary cell group. The wireless device triggers an action when the difference between primary cell group timing and secondary cell group timing is greater than a value.

A wireless network device may receive a first list indicating a first assignment for uplink and downlink time intervals in a time division duplex (TDD) frame and determine at least first downlink time intervals based on the first list. The device may receive a second list indicating a second assignment for uplink and downlink time intervals in a TDD frame and determine at least first uplink time intervals based on the second list. The device may determine at least second downlink time intervals and second uplink time intervals based on a third list, wherein the third list indicates a third assignment for uplink and downlink time intervals in a TDD frame, and wherein the second downlink time intervals include downlink time intervals of at least the first downlink time intervals and the second uplink time intervals include uplink time intervals of at least the first uplink time intervals.

A wireless device transmits a first sounding reference signal (SRS) in a first cell overlapping in time with transmission of a packet in a second cell. The first cell and the second cell are different cells of the same cell group. The wireless device drops a second SRS in the first cell when the second SRS is configured for transmission in parallel with a preamble in a cell group comprising the first cell. The wireless device has sufficient power to transmit uplink signals.

A user equipment (UE) may receive a first downlink signal, including a resource assignment having a first indication of a first resource of a plurality of resources and a number of resources of the plurality of resources in a sequence. The downlink signal may include a second indication as to applying the resource assignment to a single time interval or plurality of time intervals, which the UE may determine. The UE may receive a second downlink signal in the first time interval in the first resource and in the number of consecutive resources in the sequence on a condition that the resource assignment is for a single time interval, and a second downlink signal in each of the plurality of time intervals in the first resource and in the number of consecutive resources in the sequence on a condition that the resource assignment is for the plurality of time intervals.

A wireless apparatus (e.g., wireless access node, wireless device) and a method are described herein that use a block-wise Code Division Multiple Access (CDMA) scheme overlaid to a Time Division Multiple Access (TDMA) structure to communicate over a physical channel with another wireless apparatus (e.g., wireless device, wireless access node).

A wireless device receives message(s) configuring cell groups and transmissions of sounding reference signals (SRSs). Uplink transmission timing in a first cell group is derived employing a cell in the first cell group and uplink transmission timing in a second cell group is derived employing a second cell in the second cell group. A first signal is transmitted on a cell of the first cell group. A first subset of the SRSs are dropped and a second subset of the SRSs are transmitted.

A wireless device receives message(s) configuring cell groups and transmissions of sounding reference signals (SRSs). Uplink transmission timing in a first cell group is derived employing a cell in the first cell group and uplink transmission timing in a second cell group is derived employing a second cell in the second cell group. A first signal is transmitted on a cell of the first cell group. A first subset of the SRSs are dropped and a second subset of the SRSs are transmitted.

A radio base station (RBS) and a method performed by an RBS for scheduling uplink resources to at least one UE are provided. The RBS comprises at least two receiving antenna branches and the RBS is operable in a radio communication network. The method comprises receiving transmissions from the at least one UE by means of the at least two receiving antenna branches; and determining at least one parameter relating to signal quality of the received transmissions. The method further comprises determining a diversity gain of the at least two receiving antenna branches, wherein the diversity gain is determined based on the determined parameter(s); and scheduling uplink transmissions for the at least one UE based on the determined diversity gain.

An access point including a medium access control module and an acknowledgment generating module. The medium access control module designates a predetermined time period to communicate with a first set of client stations, and instructs a second set of client stations to transmit data at a time other than the predetermined time period. The acknowledgment generating module generates a plurality of acknowledgements in response to receiving data from the first set of client stations during the predetermined time period. The medium access control module aggregates the plurality of acknowledgements in a single aggregated frame. The single aggregated frame includes a plurality of sub-frames. Each sub-frame of the single aggregated frame includes one of the plurality of acknowledgements. The medium access control module transmit the single aggregated frame to the first set of client stations during the predetermined time period.