Telefonaktiebolaget Lm Ericsson (publ)

Krister Edström

Henrik Jeppsson

Stefan Persson

Yusheng Liu

Xueying Hou

A method is disclosed for spatial resource selection from a plurality of spatial resources. The method comprises—for each spatial resource of the plurality of spatial resources—receiving a plurality of reference signal blocks using the spatial resource (wherein at least some of the reference signal blocks are received in different frequency intervals and during different time intervals), determining (for each received reference signal block) whether or not a signal quality metric of the received reference signal block meets a quality criterion, and determining whether the spatial resource is to be considered for spatial resource selection based on the quality criterion determinations of the received reference signal blocks. The spatial resources may be beams of a beam-forming application, or antennas of a multi-antenna arrangement, or multiple-input multiple-output (MIMO) streams. The reference signal blocks may comprise one or more of uplink reference signals, sounding reference signals, demodulation reference signals, and phase tracking reference signals. Corresponding apparatus, network node and computer program product are also disclosed.

Methods and apparatuses for spatial resource selection

A network node () and method therein for performing multi-channel access procedures in a License-Assisted Access, LAA, cell in a wireless communication network are disclosed. The network node selects one carrier as a master carrier and starts a Listen Before Talk, LBT, channel sensing for all carriers at a same or different point in time. The network node further stores LBT channel sensing results for all carriers for at least the last two slot durations of a subframe and checks if the LBT channel sensing on the master carrier is successful based on its LBT channel sensing result. When the LBT channel sensing on the master carrier is successful, the network node checks the LBT channel sensing results for all other carriers, and transmits on the master carrier and the carriers where the LBT channel sensing is successful at the subframe boundary or earlier than the subframe boundary. When the subframe boundary of the master carrier is reached and the LBT channel sensing on the master carrier is not successful, the network node transmits on the carriers where the LBT channel sensing is successful at the subframe boundary or earlier than the subframe boundary.

Network node and method for performing multi-channel access procedures in a license-assisted access cell in wireless communication network

A network node () and method therein for evaluating a channel in a License Assisted Access, LAA, cell in a wireless communication network () are disclosed. The network node starts a Listen Before Talk, LBT, procedure for data transmission when a Discovery Reference Signal, DRS, is to be transmitted; and start an LBT procedure for DRS transmission in parallel with the LBT procedure for data transmission when a time of the LBT procedure for data transmission reaches a predefined value or the LBT procedure for data transmission fails.

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Hjärup, Sweden

Krister Edström