Abstract:
An apparatus and method for antenna selection in uplink coordinated multipoint communications, where a plural number of geographically separated antennas are present, forming a plural number of cells. This apparatus and method relates to selecting a PRACH configuration, sharing information regarding the selected PRACH preamble amongst cells; an user equipment, upon receiving instruction from its serving cell, transmits a PRACH preamble. All cells, including serving cell, detects the selected PRACH preamble in the received PRACH transmission transmitted by the user equipment, determining pathloss information regarding the quality of the detected selected PRACH preamble, and selecting a set of cooperative multipoint antennas from the plural number of antennas based on the determined channel quality information for this user equipment. This apparatus and method is also applicable for antenna selection in the case of a single cell with a plural number of geographically separated antennas.
Abstract:
An example method includes generating, by a first user device, a first number representing a contention resolution priority for the first user device contending for at least one first resource over a first data period for transmitting a packet of data in a device-to-device (D2D) wireless network, determining if a second device, in the D2D wireless network, is contending for resources overlapping with the at least one first resource of the first data period, if the second device is contending for resources overlapping with the at least one first resource of the first data period, determining if a second number representing a contention resolution priority for the second user device is greater than the first number, and if the second number is greater than the first number, inhibiting the first user device from communicating using the at least one first resource of the first data period.
Abstract:
A technique may include transmitting, by a user device in a proximity-based services wireless network via a first time-frequency resource identified by a first logical time index within N logical time resources and a first logical frequency index in the range from 0 to M−1, a first occurrence of a signal for the user device during a transmission period; determining a time index adjustment associated with the first logical frequency index; determining, by the user device, a second logical time index of a second time-frequency resource for transmitting from the user device a second occurrence of the signal within the transmission period, the second logical time index being determined based on the first logical time index and the time index adjustment associated with the first logical frequency index; and transmitting, by the user device via the second time-frequency resource, a second occurrence of the signal during the transmission period.
Abstract:
A method and apparatus can be configured to operate a node in a first mode to support one or more user equipment. The method can also include operating the node in a second mode to support one or more user equipment. The coverage of the second mode is enhanced compared to the coverage of the first mode. The method can also include broadcasting information about when the second mode is available.
Abstract:
Various communication systems may benefit from feedback related to communication conditions. For example, certainly wireless communication systems may benefit from channel state information acquisition and feedback, particularly in connection with, for example, full dimension multiple input multiple output. A method can include configuring, at a base station, a plurality of reference signals as sampling points for channel state information. The method can also include restoring channel state information from implicit feedback information from a user equipment based on the sampling points. The method can further include selecting a precoder based on channel state information for a specific user equipment.
Abstract:
Signaling Designs for Network Assisted Interference Cancellation and Suppression Signaling can be valuable in connection with addressing issues of interference. Signaling designs may be valuable, for example, in network-assisted interference cancellation and suppression. A method can include determining transmission information for at least one interference source for a user equipment of a base station. The method can also include signaling the user equipment about the transmission information for the at least one interference source. The transmission information can be configured to facilitate a receiver of the user equipment to cancel interference from the at least one interference source.
Abstract:
Various communication systems may benefit from identification of and communication of coverage shortfall. For example, certain communication systems that employ machine type communication devices may benefit from having such shortfall communicated from the devices to a base station. For example, a method can include determining an amount of coverage shortfall of a device. The method can also include transmitting an indication of the amount of coverage shortfall.
Abstract:
A method includes receiving a two-bit information stream comprising first and second bits and performing precoding using the two-bit information stream to determine multiple output signals. The precoding is performed to create a finite multiple of states for the output signals. The output signals comprise a first output signal based on a version of the first input bit and on a version of a second input bit, a second output signal based on a delayed version of the first input bit and the version of the second input bit, and a third output signal based on the version of first input bit and a delayed version of the second input bit. The method includes performing pulse shaping of each of the output signals to create pulse-shaped signals, combining the pulse-shaped signals to create a transmission waveform, and outputting the transmission waveform. Apparatus, computer programs, and computer program products are disclosed.
Abstract:
A method includes scheduling a selected UE operating in a FDD mode to transmit sounding information on a downlink carrier frequency using selected resource(s) from a downlink radio frame, and communicating using the downlink radio frame by transmitting to UEs in resources other than at least the selected resource(s) and by receiving the sounding information on the downlink carrier frequency from the selected UE in the selected resource(s). Another method includes scheduling a selected UE operating in a FDD mode to receive sounding information on an uplink carrier frequency using selected resource(s) from an uplink radio frame, and communicating using the uplink radio frame by receiving from UEs in resources in the uplink radio frame other than at least the selected resource(s) and by transmitting the sounding information on the uplink carrier frequency to the selected UE in the selected resource(s). Apparatus and computer program products are also disclosed.
Abstract:
Various communication systems may benefit from feedback related to communication conditions. For example, certainly wireless communication systems may benefit from channel state information acquisition and feedback, particularly in connection with, for example, full dimension multiple input multiple output. A method can include configuring, at a base station, a plurality of reference signals as sampling points for channel state information. The method can also include restoring channel state information from implicit feedback information from a user equipment based on the sampling points. The method can further include selecting a precoder based on channel state information for a specific user equipment.