Random access procedure

A wireless device, comprising:

• processing circuitry;
• and
• power supply circuitry configured to supply power to the wireless device;
• wherein the processing circuitry is configured to:
• initiate a random access procedure in which the wireless device sends a Physical Random Access Channel, PRACH, preamble to a network node;
• and
• apply a receiver configuration for receiving an access response, the receiver configuration determined based at least in part on whether a many-to-one association exists between (a) a downlink signal that, prior to initiating the random access procedure, can be used for beam selection, and (b) PRACH preamble indices.

A method performed by a base station, the method comprising:

• transmitting information to a wireless device, the information indicating whether a many-to-one association exists between (a) a downlink signal that the wireless device can use for beam selection prior to a random access procedure, and (b) physical random access channel, PRACH, preamble indices;
• transmitting one or more of the downlink signals that the wireless device can use for beam selection prior to the random access procedure;
• receiving a PRACH preamble from the wireless device;
• applying a transmitter configuration for transmitting an access response to the received PRACH preamble, the transmitter configuration based at least in part on whether a many-to-one association exists and on the received PRACH preamble.

A base station, comprising:

• processing circuitry;
• and
• power supply circuitry configured to supply power to the network node;
• wherein the processing circuitry is configured to:
• transmit information to a wireless device, the information indicating whether a many-to-one association exists between (a) a downlink signal that the wireless device can use for beam selection prior to a random access procedure, and (b) physical random access channel, PRACH, preamble indices;
• transmit one or more of the downlink signals that the wireless device can use for beam selection prior to the random access procedure;
• receive a PRACH preamble from the wireless device;
• apply a transmitter configuration for transmitting an access response to the received PRACH preamble, the transmitter configuration based at least in part on whether a many-to-one association exists and on the received PRACH preamble.