Random Access Procedure
AssigneeTelefonaktiebolaget LM Ericsson (publ)
InventorsBjörn Hofström, Jan Christoffersson, Min Wang
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Abstract
Embodiments described herein provide methods and apparatus for performing a random access procedure to access a wireless communications network. A method in a wireless device comprises responsive to transmitting a first random access preamble to a base station using first random access resources in an uplink, UL, bandwidth part, BWP, of a carrier: selecting, based on an association, a first downlink, DL, BWP of the carrier, wherein the association maps a plurality of DL BWPs of the carrier to different values of a parameter related to physical random access configurations and/or to different UL BWPs of the carrier; and monitoring the first DL BWP in order to receive a random access response from the base station.
Claims27
1-35. (canceled)
A method performed by a wireless device for performing a random access procedure to access a wireless communications network, the method comprising:
- responsive to transmitting a first random access preamble to a base station using first random access resources in an uplink (UL) bandwidth part (BWP) of a carrier:
- i. selecting, based on an association, a first downlink (DL) BWP of the carrier, wherein the association maps a plurality of DL BWPs of the carrier to different values of a parameter related to physical random access configurations and/or to different UL BWPs of the carrier;
- and
- ii. monitoring the first DL BWP in order to receive a random access response from the base station.
A method performed by a base station for performing a random access procedure, the method comprising:
- receiving from a wireless device, a first random access preamble on first random access resources;
- selecting based on an association, one or more DL BWPs, wherein the association maps a plurality of DL BWPs of a carrier to different values of a parameter related to physical random access configurations and/or to different UL BWPs of the carrier;
- and
- transmitting a respective random access response message using resources in each of the one or more DL BWPs.
A wireless device for performing a random access procedure to access a wireless communications network, the wireless device comprising processing circuitry configured to:
- responsive to transmitting a first random access preamble to a base station using first random access resources in an uplink (UL) bandwidth part (BWP) of a carrier:
- i. select, based on an association, a first downlink (DL) BWP of the carrier, wherein the association maps a plurality of DL BWPs of the carrier to different values of a parameter related to physical random access configurations and/or to different UL BWPs of the carrier;
- and
- ii. monitor the first DL BWP in order to receive a random access response from the base station.
The wireless device of claim 58, wherein the processing circuitry is configured to perform the step of selecting by selecting the first DL BWP based on a bandwidth capability associated with the wireless device.
A base station for performing a random access procedure, the base station comprising processing circuitry configured to:
- receive from a wireless device, a first random access preamble on first random access resources;
- select, based on an association, one or more DL BWPs, wherein the association maps a plurality of DL BWPs of a carrier to different values of a parameter related to physical random access configurations and/or to different UL BWPs of the carrier;
- and
- transmit a respective random access response message using resources in each of the one or more DL BWPs.
Dependencies are inferred from the claim text.