摘要:
One way to increase robustness against beam pair link failure is by transmitting downlink (DL) control signaling (e.g., PDCCH) in more than one beam. That is, one way to mitigate BPLF is for the UE to receive DL control signaling over both a first BPL (e.g., active BPL) and a second BPL (e.g., monitored BPL) but with larger duty cycle for the second BPL compared to the first BPL. For example, the control signaling can be scheduled every slot on the first BPL and scheduled every Nth slot on the second BPL. In this way, in case the first BPL is blocked and the UE cannot decode the control signaling on the first BPL, the UE can receive control signaling transmitted on the second BPL.
摘要:
The invention relates to an active antenna arrangement for transmitting precoded signals in a communication system supporting multi-stream beam-forming. The active antenna arrangement comprises: three or more active antenna devices each comprising an antenna element and a power amplifier; at least a first and a second splitter, each arranged to split a respective one of the precoded signals into two or more split precoded signals; and at least one combiner arranged to: receive one of the two or more split precoded signals from the first splitter, and one of the two or more split precoded signals from the second splitter, and combine the received split precoded signals for transmission by a single one of the active antenna devices. The invention also relates to a base station, methods and computer programs.
摘要:
A node for use in a wireless communication system comprising at least two Tx-chains and at least two Rx-chains is provided. A first means for a switch and filter network function MSN is arranged across all Tx-chains. The first MSN is arranged to output one antenna sector signal comprising: a radio sector signal, or a split radio sector signal, the splitting of a radio sector signal allowing one radio sector signal to feed sector antennas in more than one sector, each sector having at least one sector antenna. The first or a second MSN can also be arranged across Rx-chains. Further, a method to reduce power consumption in a node and a wireless communication system comprising the node is provided.
摘要:
The invention relates to a wireless outdoor-indoor multiple-input multiple-output (MIMO) communications system for communicating with user equipment located inside a physical structure such as a building. The MIMO communication system is comprised of a node having at least two node antennas, wherein the node is configured for line of sight (LOS) wireless MIMO communication with at least two outdoor-indoor repeaters, and of at least two outdoor-indoor repeaters adapted for LOS wireless MIMO communication with the node. The repeaters have at least one repeater antenna each, provided outside the physical structure, for LOS MIMO communication with the node and at least one leaky cable each, provided inside the physical structure, for indoor MIMO communication with the user equipment located inside the physical structure. The repeaters are provided outside on the same physical structure and spaced well-apart, and each leaky cable of each repeater is provided such that they provide the same indoor coverage of the same interior space in the physical structure.
摘要:
In a method of controlling downlink transmitting power and antenna coverage of base stations in a communication system, the system comprising a plurality of base stations and a plurality of user equipment each associated with at least one of the plurality of base stations, providing (S10) interference and noise information for each of at least a subset of the plurality of user equipment. Subsequently, identifying (S20) at least one interfering base station for at least one user equipment of the subset, and jointly analyzing (S30) the provided interference and noise information for the subset together with the identified at least one interfering base station. Finally, jointly adapting (S40) a transmitting power level and/or an antenna beam of the at least one identified interfering base stations based on the analysis, to provide reduced power consumption and increased coverage in the communication system.
摘要:
The method and apparatus disclosed herein improve throughput conditions limited by multiplicative noise by determining precoder weights for each data stream communicated between a MIMO transmitter node and a MIMO receiver node. The precoder weights are determined based on information derived from non-precoded reference symbols to decrease the energy allocated to the dominant signal path relative to the energy allocated to the non-dominant signal paths.