Abstract:
According to an example aspect of the present disclosure, there is provided a method comprising performing with a first node beam measurement for downlink beams received with the first node from at least one second node, scheduling with the first node at least one third node for uplink transmission to the first node, determining with the first node one or more of the downlink beams that can be received simultaneously with a beam of the at least one third node based at least partially on the scheduling of the at least one third node and the performing of the beam measurement, and transmitting with the first node results of the performed beam measurement wherein the results comprise an indication of the one or more determined downlink beams that can be received simultaneously with the beam of the at least one third node.
Abstract:
Systems, methods, apparatuses, and computer program products for an interleaved multi-beam acquisition waveform providing concurrent beam selection, automatic gain control (AGC) and automatic frequency correction (AFC) are provided. The access point (AP) may send an acquisition waveform on multiple beams, then return and retransmit an AFC on the multiple beams thus interleaving beam switching with the acquisition and frequency correction waveforms. AGC correction can be deferred until the end, relying on the fact that the transmitter may be detected at close range using a one of the multi-beams that is attenuated.
Abstract:
Systems, methods, apparatuses, and computer program products for random access channel (RACH) with a grid of beams for communication systems are provided. One method includes transmitting, by a base station, a beacon signal in one time slot with multiple switched beams, wherein the beams cover an intended coverage area with a grid-of-beams in both horizontal and vertical directions. The method may also comprise switching receiving beams in the grid-of-beams at a network reserved random access channel (RACH) slot by following an identical or directly related beam switching pattern in a downlink (DL) beacon channel. Another method includes detecting, by a user equipment, a beam ID in the downlink beacon channel, selecting the RACH slot using the detected beam ID, and transmitting, by the user equipment, a random access channel (RACH) signature in one or multiple beam blocks within a random access channel (RACH) slot.
Abstract:
A group of data symbols for a current block of data symbols in multiple blocks received over a communication channel is equalized, based on a pilot block, to generate a group of equalized symbols. The group of equalized symbols is de-rotated as a function of a current phase estimate to determine initial de-rotated equalized symbols. The phase estimate is an estimate of phase caused by noise for blocks previous to the current block. Additionally, a phase metric is calculated from real and imaginary parts of the initial de-rotated equalized symbols, wherein the phase metric estimates phase caused by noise for the current block. The current phase estimate is updated with the phase metric. The initial de-rotated equalized symbols are de-rotated by the phase metric to determine final equalized and de-rotated symbol estimates. The final equalized and de-rotated symbol estimates are output. Apparatus, methods, and computer program products are disclosed.
Abstract:
Various communication systems may benefit from rerouting considerations. For example, fifth generation (5G) systems dealing with radio link failure detection and data rerouting, particularly mmWave 5G systems, may benefit from rapid rerouting methods and systems. A method can include transmitting, from an access point, a downlink control message to a user equipment. The method can also include attempting to detect a Fast-ACK transmission signal from the user equipment in response to the transmitted downlink control message. The method can further include transmitting a rerouting request for the user equipment when the Fast-ACK transmission signal is not detected.
Abstract:
A technique of reducing interference at a wireless node includes: determining a location of a base station relative to a wireless node, determining, based at least on the location of the base station relative to the wireless node, a beam-reduction region that includes one or more interfering transmit beams of the base station within the beam-reduction region, and causing the base station to decrease a transmit power for the one or more interfering transmit beams within the beam-reduction region.
Abstract:
A user device's (UD) radio link with a network node is determined to satisfy an entering condition for a measurement event, where there is a specified duration such as a TTT over which the entering condition shall be satisfied. A timer associated with that determination is initiated to track the specified duration, but prior to expiry of the tracked duration the UD experiences radio link blockage with the network node. Various options are presented for what measurements can be used to satisfy the requirements of the measuring event, the end result being the UD is able to wirelessly send a measurement report about the network node that satisfies the measurement event, hi various embodiments the timer is stopped and re-started, or it is suspended and resumed, and some embodiments use estimated measurements that are extrapolated and/or interpolated from actual measurements taken before and/or after the link blockage occurs.
Abstract:
An example technique may include determining, by a user device, downlink control channel timing information for each of a plurality of access points including for a serving access point that serves the user device and one or more standby access points; sending, by the user device to a cluster set manager via the serving access point, the downlink control channel timing information for each of the plurality of access points; receiving, by the user device from the cluster set manager via the serving access point, downlink control channel allocations including information identifying a downlink control channel allocated to the user device for each of a plurality of the access points; and receiving, by the user device, information from at least one of a plurality of the access points via a downlink control channel allocated to the user device for the at least one of the plurality of access points.
Abstract:
A method and apparatus may determine a plurality of access points. The plurality of access points belong to a cluster set of a user device. The method may also include allocating a plurality of random-access-channel slots to the plurality of access points such that the plurality of random-access-channel slots are staggered in time over a random-access-channel period within a frame structure used by the user device.
Abstract:
Systems, methods, apparatuses, and computer program products for backhaul scheduling in a multi-hop network are provided. One method includes providing, in the multi-hop network, an uplink control portion and a downlink control portion and a data portion in a slot. The method may further include scheduling, by an access point in the multi-hop network, at least one of a backhaul transmission for the slot or at least one following slot or an access transmission for the slot.