Method and apparatus for monitoring physical downlink control channel (PDCCH) in a wireless communication system
A method and apparatus are disclosed from the perspective of a UE. In one embodiment, the method includes receiving a signalling from a network node to trigger a non-contention based random access procedure, wherein the signalling includes a first information indicating a first numerology and a second information indicating a second numerology. The method also includes transmitting a random access preamble based on the second numerology to the network node. The method further includes receiving a random access response from the network node. In addition, the method includes monitoring a control channel for scheduling a new transmission based on the first numerology.
1. A method of a UE (User Equipment), comprising:
receiving a Handover Command from a network node to trigger a non-contention based random access procedure, wherein the Handover Command includes a first information indicating a first numerology and a second information indicating a second numerology;
transmitting a random access preamble based on the second numerology to the network node;
receiving a random access response from the network node; and
monitoring a control channel for scheduling a new transmission based on the first numerology after reception of the random access response.
2. The method of claim 1 , wherein the control channel is PDCCH (Physical Downlink Control Channel) and/or NR-PDCCH (New Radio Access Technology-PDCCH).
3. The method of claim 1 , wherein the new transmission is a DL (Downlink) transmission or an Uplink (UL) transmission.
4. The method of claim 1 , wherein each numerology corresponds to a subcarrier spacing in a frequency domain.
5. A method of a UE (User Equipment), comprising:
receiving a PDCCH (Physical Downlink Control Channel) order from a network node to trigger a non-contention based random access procedure;
transmitting a random access preamble based on a second numerology to the network node, wherein the second numerology is a second default numerology broadcasted in system information;
receiving a random access response from the network node; and
monitoring a control channel for scheduling a new transmission based on a first numerology after reception of the random access response, wherein the first numerology is a first default numerology broadcasted in system information.
6. The method of claim 5 , wherein the control channel is PDCCH (Physical Downlink Control Channel) and/or NR-PDCCH (New Radio Access Technology-PDCCH).
7. The method of claim 5 , wherein the new transmission is a DL (Downlink) transmission or an Uplink (UL) transmission.
8. The method of claim 5 , wherein each numerology corresponds to a subcarrier spacing in a frequency domain.
9. A User Equipment (UE), comprising:
a control circuit;
a processor installed in the control circuit; and
a memory installed in the control circuit and operatively coupled to the processor;
wherein the processor is configured to execute a program code stored in the memory to:
receive a Handover Command from a network node to trigger a non-contention based random access procedure, wherein the Handover Command includes a first information indicating a first numerology and a second information indicating a second numerology;
transmit a random access preamble based on the second numerology to the network node;
receive a random access response from the network node; and
monitor a control channel for scheduling a new transmission based on the first numerology after reception of the random access response.
10. A User Equipment (UE), comprising:
a control circuit;
a processor installed in the control circuit; and
a memory installed in the control circuit and operatively coupled to the processor;
wherein the processor is configured to execute a program code stored in the memory to:
receive a PDCCH (Physical Downlink Control Channel) order from a network node to trigger a non-contention based random access procedure;
transmit a random access preamble based on a second numerology to the network node, wherein the second numerology is a second default numerology broadcasted in system information;
receive a random access response from the network node; and
monitor a control channel for scheduling a new transmission based on a first numerology after reception of the random access response, wherein the first numerology is a first default numerology broadcasted in system information.
11. A network node, comprising:
a control circuit;
a processor installed in the control circuit; and
a memory installed in the control circuit and operatively coupled to the processor;
wherein the processor is configured to execute a program code stored in the memory to:
transmitting a Handover Command to a User Equipment (UE), to trigger a non-contention based random access procedure, wherein the Handover Command includes a first information indicating a first numerology and a second information indicating a second numerology;
receive a random access preamble based on the second numerology from the UE;
transmit a random access response to the UE; and
transmitting a control channel to the UE for scheduling a new transmission based on the first numerology after transmission of the random access response.
12. The network node of claim 11 , wherein each numerology corresponds to a subcarrier spacing in a frequency domain.
13. The network node of claim 11 , wherein the control channel is Physical Downlink Control Channel (PDCCH) or New Radio Access Technology-PDCCH (NR-PDCCH).
14. The network node of claim 11 , wherein the new transmission is a Downlink (DL) transmission or an Uplink (UL) transmission.
15. A network node, comprising:
a control circuit;
a processor installed in the control circuit; and
a memory installed in the control circuit and operatively coupled to the processor;
wherein the processor is configured to execute a program code stored in the memory to:
transmit a PDCCH (Physical Downlink Control Channel) order to a User Equipment to trigger a non-contention based random access procedure;
receive a random access preamble based on a second numerology from the UE, wherein the second numerology is a second default numerology broadcasted in system information;
transmit a random access response to the UE; and
transmit a control channel to the UE for scheduling a new transmission based on a first numerology after transmission of the random access response after transmission of the random access response, wherein the first numerology is a first default numerology broadcasted in system information.
16. The network node of claim 15 , wherein each numerology corresponds to a subcarrier spacing in a frequency domain.
17. The network node of claim 15 , wherein the control channel is Physical Downlink Control Channel (PDCCH) or New Radio Access Technology-PDCCH (NR-PDCCH).
18. The network node of claim 15 , wherein the new transmission is a Downlink (DL) transmission or an Uplink (UL) transmission.
19. A method of a network node, comprising the steps of:
transmitting a Handover Command to a User Equipment, in the following also referred to as UE, to trigger a non-contention based random access procedure, wherein the Handover Command includes a first information indicating a first numerology and a second information indicating a second numerology;
receiving a random access preamble based on the second numerology from the UE;
transmitting a random access response to the UE; and
transmitting a control channel to the UE for scheduling a new transmission based on the first numerology after transmission of the random access response.
20. A method of a network node, comprising:
transmitting a Physical Downlink Control Channel (PDCCH) order to a User Equipment (UE) to trigger a non-contention based random access procedure;
receiving a random access preamble based on a second numerology from the UE, wherein the second numerology is a second default numerology broadcasted in system information;
transmitting a random access response to the UE; and
transmitting a control channel to the UE for scheduling a new transmission based on a first numerology after transmission of the random access response after transmission of the random access response, wherein the first numerology is a first default numerology broadcasted in system information.