A base station is provided which notifies a mobile station of transmission power information for an uplink RACH, the mobile station transmits transmission delay estimation information on the RACH to the base station over the RACH at a transmission power based on the transmission power information, and the base station changes the transmission power information according to the transmission delay estimation information and notifies the mobile station of the changed transmission power information. The mobile station retransmits data or a preamble if the mobile station does not receive a notification that the base station has received the data or the preamble correctly after a predetermined time. The base station transmits the transmission power information over a BCH and a CPICH transmitted to a plurality of mobile stations.

A method for reducing power consumption is described. The method includes negotiating a receive window of a slave wireless device. The method also includes exchanging timing uncertainty information relating to a clock of the slave wireless device and a clock of the master wireless device. The method further includes transmitting a packet multiple times on a same frequency based on the receive window and the timing uncertainty information.

A method for reducing power consumption is described. The method includes negotiating a receive window of a slave wireless device. The method also includes exchanging timing uncertainty information relating to a clock of the slave wireless device and a clock of the master wireless device. The method further includes transmitting a packet multiple times on a same frequency based on the receive window and the timing uncertainty information.

In some embodiments, a wireless device receives configuration parameters of first reference signals (RSs) and second RSs. A first RS of the first RSs is selected based on signal strengths of first RSs. A second RS of the second RSs is selected based on signal strengths of the second RSs. A random access preamble based on at least one of the first RS and the second RS is transmitted. A random access response comprising an uplink grant scheduling uplink resources for uplink transmissions with repetitions is received. First repetitions, of the repetitions of a transport block, with a first transmission power based on the first RS are transmitted via the uplink resources. Second repetitions, of the repetitions of the transport block, with a second transmission power based on the second RS are transmitted via the uplink resources.

Sensors within sensor node networks may communicate bio-event or other types of measurement results/decisions between each other using signal transmission variations. Each sensor node within a network and between networks may transmit and receive signals. A sensor node may scale a signal transmission power in a manner that is proportional to a confidence level of a decision or measurement about an event being detected. Each sensor node will receive transmissions from neighboring nodes, and can refine an estimate about an occurrence of the event at its location based on received signal strengths, for example.

A communication control method used in a cellular mobile communication system that performs inter-terminal communication that is direct radio communication capable of being performed between user terminals in a state where a radio connection with a network is established, comprises a step of transmitting, by a first user terminal, to the network, communication request information indicating a desire to start the inter-terminal communication, a step of transmitting, by the network, to a second user terminal, start request information for starting waiting for a search signal, in a case where the second user terminal identified on the basis of the communication request information is stopping the waiting for the search signal for the inter-terminal communication, and a step of starting, by the second user terminal, waiting for the search signal upon receiving the start request information from the network.

A method and apparatus is provided, where a respective reference signal associated with each of one or more downlink transmit antenna ports in a wireless communication network is received. A value is determined for each of one or more measurable characteristics relative to each of the received reference signals. One or more parameters are received, the parameters including one or more adjustments, where each adjustment is specific to one of the downlink transmit antenna ports and include adjustments in the form of one or more respective offset values to be applied to at least some of the one or more determined values of the measurable characteristics of the received reference signals. At least one downlink transmit antenna port is then to function as a serving downlink transmit antenna port for the user equipment, based upon a comparison of the resulting values of the measurable characteristics of the received reference signals after the received one or more adjustments have been applied to the corresponding determined values.

A method and apparatus is provided, where a respective reference signal associated with each of one or more downlink transmit antenna ports in a wireless communication network is received. A value is determined for each of one or more measurable characteristics relative to each of the received reference signals. One or more parameters are received, the parameters including one or more adjustments, where each adjustment is specific to one of the downlink transmit antenna ports and include adjustments in the form of one or more respective offset values to be applied to at least some of the one or more determined values of the measurable characteristics of the received reference signals. At least one downlink transmit antenna port is then to function as a serving downlink transmit antenna port for the user equipment, based upon a comparison of the resulting values of the measurable characteristics of the received reference signals after the received one or more adjustments have been applied to the corresponding determined values.

A method for transmitting signals by a medium access control (MAC) entity of a transmission end in a wireless communication system is disclosed. The method includes steps of receiving a protocol data unit (PDU) from a Radio Link Control (RLC) layer; transmitting a signal including the PDU based on a specific coverage enhanced (CE) level to a network; when a transmission of the signal to a network is failed, determining whether a current CE level is changed or not from the specific CE level; if the current CE level is changed from the specific CE level, transmitting an indication requesting a retransmission of the PDU, to the RLC layer; receiving the PDU from the RLC layer; and transmitting a signal including the PDU based on the current CE level to the network.

Aspects of the current patent document include systems and methods to improve configuration of network communication links between devices. In embodiments, a device may attempt auto-negotiation with another device in which transmit power levels are increased in an attempted to establish the link. In embodiments, an approach to establishing a link comprises setting the device in static mode but enabling link training. In yet another embodiment, a hybrid approach to interfaces link up may comprise having auto-negotiation with increasing transmit power attempts enabled by default, followed by static mode link up with link training enabled, in the case the auto-negotiation fails.