Apparatus, method, and computer program
A method comprises causing a message to be transmitted from a communications device to a transmission reception point during a random access procedure. The message comprises information identifying a plurality of different beam directions. The method further comprises receiving a response to the message from a plurality of different beam directions.
1. A method comprising:
causing a MsgA message to be transmitted from a communications device to a transmission reception point during a random access procedure, said MsgA message comprising information identifying a plurality of different beam directions, wherein the information identifying the plurality of different beam directions is provided using a preamble index; and
monitoring a MsgB message in response to said MsgA message from the plurality of different beam directions.
2. An apparatus comprising at least one processor and at least one memory including computer code for one or more programs, the at least one memory and the computer code configured, with the at least one processor, to cause the apparatus at least to:
cause a MsgA message to be transmitted from the apparatus to a transmission reception point during a random access procedure, said MsgA message comprising information identifying a plurality of different beam directions, wherein the information identifying the plurality of different beam directions is provided using a preamble index; and
monitor a MsgB message in response to said MsgA message from the plurality of different beam directions.
3. The apparatus as claimed in claim 2 , wherein the at least one memory and the computer program code are configured to, with the at least one processor, cause the apparatus at least to receive reference beam signals from one or more transmission reception points.
4. The apparatus as claimed in claim 3 , wherein the reference beam signals comprise synchronization signal block beams.
5. The apparatus as claimed in claim 2 , wherein the at least one memory and the computer program code are configured to, with the at least one processor, cause the apparatus at least to determine a plurality of preferred beam directions, said information identifying a preferred beam direction.
6. The apparatus as claimed in claim 5 , wherein said information comprises a beam identity of said preferred beam direction and a cell identity associated with a respective beam.
7. The apparatus as claimed in claim 2 , wherein the information identifying the plurality of different beam directions is provided: as part of uplink control information; as part of one or more media access control control elements; and/or using a physical random access channel occasion.
8. The apparatus as claimed in claim 2 , wherein the at least one memory and the computer program code are configured to, with the at least one processor, cause the apparatus at least to receive configuration information indicating one or more of: a number of beam directions to be identified in said message; and a number of transmission reception points from which one or more beam directions are to be identified in said message.
9. An apparatus comprising at least one processor and at least one memory including computer code for one or more programs, the at least one memory and the computer code configured, with the at least one processor, to cause the apparatus at least to:
receive a MsgA message for a transmission reception point during a random access procedure, said MsgA message being from a communications device and comprising information identifying a plurality of different beam directions, wherein the information identifying the plurality of different beam directions is provided using a preamble index; and
cause a MsgB message in response to said MsgA message to be transmitted from the plurality of different beam directions.
10. The apparatus as claimed in claim 9 , wherein the at least one memory and the computer program code are configured to, with the at least one processor, cause the apparatus at least to cause a plurality of reference beam signals to be transmitted to said communications device.
11. The apparatus as claimed in claim 10 , wherein the reference beam signals comprise synchronization signal block beams.
12. The apparatus as claimed in claim 9 , wherein said information comprises one or more of a beam identity of a respective preferred beam direction and a cell identity associated with a respective beam.
13. The apparatus as claimed in claim 9 , wherein the information identifying the plurality of different beam directions is provided: as part of uplink control information; as part of one or more media access control control elements; and/or using a physical random access channel occasion.
14. The apparatus as claimed in claim 9 , wherein the at least one memory and the computer program code are configured to, with the at least one processor, cause the apparatus at least to cause configuration information to be transmitted to said communications device, said configuration information indicating one or more of: a number of beam directions to be identified in said message; and a number of transmission reception points from which one or more beam directions are to be identified in said message.
15. The apparatus as claimed in claim 9 , wherein the at least one memory and the computer program code are configured to, with the at least one processor, cause the apparatus at least to cause a request to be transmitted to a further transmission reception point to request that said further transmission reception point transmit said response in at least one of said plurality of different beam directions.