Abstract: A first base station provides overlapping coverage area with each of a plurality of second base stations. Each of the plurality of second base stations transmits a message comprising a subframe allocation bitmap indicating a plurality of subframes. The plurality of subframes comprises a plurality of almost blank subframes. Base stations in the plurality of second base stations configure the same set of subframes as the plurality of almost blank subframes.
Abstract: A first signal is transmitted starting in a first subframe of a cell of a first cell group. A second signal is configured for transmission in a second subframe of a second cell group. Transmission of the second signal is dropped if a power value is more than an allowable transmission power. A calculation of the power value considers transmission power of the first signal and the second signal if the first subframe and the second subframe overlap in time with more than a first duration.
Abstract: A base station transmits to a wireless device at least one timing-advance command (TAC) for a secondary cell group. Each of the at least one TAC includes a timing-advance value (TAV) to be employed by the wireless device to update a first TAV. The base station transmits, to the wireless device and after the TAT expires, a second TAC with a TAV of zero for the secondary cell group. The base station receives uplink signals from the wireless device according to the updated first TAV.
Abstract: A wireless device receives messages comprising parameters of carriers and carrier groups. Downlink transmissions on a first carrier and at least one second carrier are substantially time aligned with each other. The wireless device receives time alignment commands comprising a time adjustment value and an index identifying a carrier group. Uplink transmissions on a first carrier group and a second carrier group employ different synchronization signals on different carriers as timing reference and are adjusted in response to different time alignment commands.
Abstract: A base station transmits a message to a plurality of wireless devices in connected mode. The message comprises a subframe allocation bitmap indicating a plurality of subframes. The plurality of subframes comprises a plurality of almost blank subframes. During majority of symbols of an almost blank subframe of a base station, signals are transmitted at an almost blank subframe power level that is different from a transmit power during a non-almost blank subframe.
Abstract: A first base station provides overlapping coverage area with second base stations and third base stations. Second base stations allow access to wireless devices and configure a second plurality of almost blank subframes. Second base stations configure the same set of subframes as the second plurality of almost blank subframes. Third base stations allow access to a restricted subset of wireless devices and configure a third plurality of almost blank subframes. At least two base stations in the third base stations configure different set of subframes as the second plurality of almost blank subframes.
Abstract: A wireless device receives message(s) comprising configuration parameters of sounding reference signals on a secondary cell in a secondary cell group. The wireless device transmits one or more of the sounding reference signals on the secondary cell after applying a timing advance to the secondary cell group. The wireless device is configured to not transmit any of the sounding reference signals on the secondary cell after receiving the message(s) and before receiving the timing advance.
Abstract: Transmission timing of a random access preamble in an uplink carrier of a carrier group being determined employing a synchronization signal transmitted on a downlink carrier of the carrier group. The wireless device receives a time alignment command from the base station. The time alignment command comprises a time adjustment value and an index identifying the carrier group. The wireless device applies the time adjustment value to uplink signals transmitted on all activated uplink carriers in the carrier group.
Abstract: A first base station transmits, to a second base station and after making a handover decision for a wireless device, a first message. The first message comprises at least one parameter indicating the wireless device supports configuration of a plurality of cell groups. The first base station receives from the second base station a second message comprising first configuration parameters of a plurality of cells grouped into a first plurality of cell groups comprising a first cell group and a second cell group. The first base station transmits, to the wireless device, a third message comprising the first configuration parameters.
Abstract: A wireless device receives control message(s) comprising parameters of a plurality of cell groups and a pathloss reference for each secondary cell. The wireless device transmits uplink signals in a first secondary cell in a secondary cell group. Transmission power of the uplink signals is determined employing a received power of the pathloss reference assigned to the first secondary cell. Timing of the uplink signals in the secondary cell group employs a synchronization signal on an active secondary cell in the secondary cell group as a timing reference.
Abstract: 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.
Abstract: A base station transmits a message after an increase in the number of wireless devices and/or a traffic load by an amount greater than a value. The message comprises an updated subframe allocation bitmap indicating a second plurality of subframes including an updated plurality of almost blank subframes. The updated plurality of almost blank subframes includes a smaller number of almost blank subframes than an initial plurality of almost blank subframes.
Abstract: A wireless device at least demodulates, descrambles and decodes a first control signal to generate a first signal. The wireless device processes the first signal by at least encoding, scrambling, modulating and scaling the first signal. The wireless device subtracts the processed first signal from received signals to generate a second signal. The wireless device at least demodulates, descrambles and decodes the second signal to generate a physical broadcast message. The wireless device determines a plurality of system parameters of a base station employing the physical broadcast message.
Abstract: A wireless device receives a control command initiating a random access process for a secondary cell. The wireless device transmits a random access preamble on random access resources of the secondary cell. The wireless device aborts the random access process if the secondary cell is deactivated before the wireless device receives a random access response.
Abstract: A wireless network site comprises a base station and a cell site gateway. The cell site gateway comprises a first interface connected to the base station, a second interface connected to a packet network gateway, a label forwarding layer, and a third interface connected to a signaling peer to exchange control plane information to program the forwarding layer. The label forwarding layer transmits and receive packets. The control plane information comprises at least one first label value for transmitting a first plurality of packets to the base station and at least one second label value for transmitting a second plurality of packets to the packet network gateway.
Abstract: A first base station provides overlapping coverage area with each of a plurality of second base stations. Each of the plurality of second base stations transmits a message comprising a subframe allocation bitmap indicating a plurality of subframes. The plurality of subframes comprises a plurality of almost blank subframes. Base stations in the plurality of second base stations configure the same set of subframes as the plurality of almost blank subframes.
Abstract: A wireless device receives a first reference signal from a first base station and estimates a first signal strength based on the received first reference signal. The wireless device receives a second reference signal from a second base station and estimates a second signal strength based on the received second reference signal. The wireless device estimates an interference value based, at least in part, on the second reference signal. The wireless device estimates a signal to interference ratio value based on the second signal strength and a total interference value. The total interference value is computed based upon the interference value or the interference value plus the first signal strength.
Abstract: A base station transmits control message(s) comprising media access control dedicated parameters. The media access control dedicated parameters comprise a primary time alignment timer value for a primary cell group and a sequence of at least one element. Each element comprises a secondary time alignment timer value and a secondary cell group index. The secondary time alignment timer value is associated with the cell group identified by the secondary cell group index. Each secondary time alignment timer value is selected from a finite set of predetermined values.
Abstract: A wireless device transmits a first signal in a first cell group and transmits a second signal in a second cell group. The wireless device adjusts a signal transmission power of one of the first signal and the second signal if a power value exceeds an allowable transmission power and if an overlapping in time exceeds a first duration.
Abstract: 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 if transmission of SRSs overlap in time with transmission of the first signal and a calculated total transmission power exceeds a first power value.