Network initiated reselection of transmitter and receiver configurations

A network node in a wireless communication network comprising:

• interface circuitry configured to transmit signals to, and receive signals from, a wireless device served by the network node;
• and
• processing circuitry configured to:
• select, based on a spatial quasi co-location (QCL) assumption, an initial transmitter configuration for transmitting downlink data signals to the wireless device by:
• sending two or more downlink synchronization signals to the wireless device in different spatial directions;
• receiving a random access signal from the wireless device on a random access channel, the random access signal indicating a preferred downlink synchronization signal;
• and
• selecting the initial transmitter configuration based on the preferred downlink synchronization signal;
• determine a quality of an uplink signal received from the wireless device;
• and
• based on the quality of the uplink signal, initiate a reselection procedure to select a new transmitter configuration for transmitting the downlink data signals in accordance with a further spatial QCL assumption.

A non-transitory computer readable recording medium storing a computer program product for controlling a network node in a wireless communication network, the computer program product comprising software instructions which, when run on processing circuitry of the network node, causes the network node to:

• select, based on a spatial quasi co-location (QCL) assumption, an initial transmitter configuration for transmitting downlink data signals to a wireless device by:
• sending two or more downlink synchronization signals to the wireless device in different spatial directions;
• receiving a random access signal from the wireless device on a random access channel, the random access signal indicating a preferred downlink synchronization signal;
• and
• selecting the initial transmitter configuration based on the preferred downlink synchronization signal;
• determine a quality of an uplink signal received from the wireless device;
• and
• based on the quality of the uplink signal, initiate a reselection procedure to select a new transmitter configuration for transmitting the downlink data signals in accordance with a further spatial QCL assumption.

A method implemented by a wireless device in a wireless communication network, the method comprising the wireless device:

• selecting, based on a spatial quasi co-location (QCL) assumption, an initial receiver configuration for receiving downlink data signals from a network node by:
• receiving, at the wireless device, two or more downlink synchronization signals transmitted by the network node in different spatial directions;
• selecting a preferred one of the downlink synchronization signals;
• selecting the initial receiver configuration based on the preferred downlink synchronization signal;
• and
• sending a random access signal to the network node on a random access channel, the random access signal indicating the preferred synchronization signal;
• receiving a trigger signal from the network node;
• and
• responsive to the trigger signal, executing a reselection procedure to select a new receiver configuration for receiving the downlink data signals based on a further spatial QCL assumption.

A wireless device in a wireless communication network comprising:

• interface circuitry for transmitting signals to and receiving signals from a network node;
• and
• processing circuitry configured such that the wireless device is operative to:
• select, based on a spatial quasi co-location (QCL) assumption, an initial receiver configuration for receiving downlink data signals from a network node by:
• receiving, at the wireless device, two or more downlink synchronization signals transmitted by the network node in different spatial directions;
• selecting a preferred one of the downlink synchronization signals;
• selecting the initial receiver configuration based on the preferred downlink synchronization signal;
• and
• sending a random access signal to the network node on a random access channel, the random access signal indicating the preferred synchronization signal;
• receive a trigger signal from the network node;
• and
• responsive to the trigger signal, execute a reselection procedure to select a new receiver configuration for receiving the downlink data signals based on a further spatial QCL assumption.

A non-transitory computer readable recording medium storing a computer program product for controlling a wireless device in a wireless communication network, the computer program product comprising software instructions which, when run on processing circuitry of the wireless device, causes the wireless device to:

• select, based on a spatial quasi co-location (QCL) assumption, an initial receiver configuration for receiving downlink data signals from a network node by:
• receiving, at the wireless device, two or more downlink synchronization signals transmitted by the network node in different spatial directions;
• selecting a preferred one of the downlink synchronization signals;
• selecting the initial receiver configuration based on the preferred downlink synchronization signal;
• and
• sending a random access signal to the network node on a random access channel, the random access signal indicating the preferred synchronization signal;
• receive a trigger signal from the network node;
• and
• responsive to the trigger signal, execute a reselection procedure to select a new receiver configuration for receiving the downlink data signals based on a further spatial QCL assumption.