Two-step random access
AssigneeTelefonaktiebolaget LM Ericsson (publ)
InventorsJonas SEDIN, Zhipeng LIN, Johan RUNE
Life of this patent
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Abstract
A UE is provided with a dedicated preamble for use in a two-step random access procedure, as well as dedicated, contention-free PUSCH transmission resources for the PUSCH part of msgA. In one embodiment, the base station transmits a partial PUSCH msgA configuration to the UE using dedicated RRC signaling. In another embodiment, the base station transmits a resource index to the UE indicative of a dedicated PUSCH resource for a msgA transmission via dedicated RRC signaling.
Claims42
A method implemented by a user equipment (UE) of performing two-step, contention-free random access, the method comprising:
- receiving a partial Physical Uplink Shared Channel (PUSCH) resource configuration for a Message A (msgA) transmission including a dynamic part of the PUSCH resource configuration for the msgA transmission;
- transmitting, to a base station, the preamble of msgA;
- and
- transmitting, to the base station, the PUSCH message of msgA using PUSCH resources indicated by the dynamic part of the PUSCH resource configuration.
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-8. (canceled)
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A method implemented by a base station of supporting two-step, contention-free random access, the method comprising:
- transmitting, to a user equipment (UE), a partial Physical Uplink Shared Channel (PUSCH) resource configuration for a Message A (msgA) transmission including a dynamic part of the PUSCH resource configuration for the msgA transmission;
- receiving, from the UE, the preamble of msgA;
- and
- receiving, from the UE, the PUSCH message of msgA using PUSCH resources indicated by the dynamic part of the PUSCH resource configuration.
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-22. (canceled)
A method implemented by a user equipment (UE) of performing two-step, contention-free random access, the method comprising:
- receiving, via dedicated Radio Resource Control (RRC) signaling, a Physical Uplink Shared Channel (PUSCH) resource identifier indicative of a dedicated PUSCH resource for a Message A (msgA) transmission, wherein msgA includes a preamble and a PUSCH message;
- transmitting, to a base station, the preamble of msgA;
- and
- transmitting, to the base station, the PUSCH message of msgA using the PUSCH resources indicated by the PUSCH resource identifier.
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-29. (canceled)
A method implemented by a base station of supporting two-step, contention-free random access, the method comprising:
- transmitting, to a user equipment (UE) via dedicated Radio Resource Control (RRC) signaling, a Physical Uplink Shared Channel (PUSCH) resource identifier indicative of a dedicated PUSCH resource for a Message A (msgA) transmission, wherein msgA includes a preamble and a PUSCH message;
- receiving, from the UE, the preamble of msgA;
- and
- receiving, from the UE, the PUSCH message of msgA using the PUSCH resources indicated by the PUSCH resource identifier.
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-38. (canceled)
A user equipment (UE) configured to perform two-step, contention-free random access, the UE comprising:
- communication circuitry configured for communication with a base station over a wireless communication channel;
- and
- processing circuitry configured to, in conjunction with the communication circuitry:
- receive a partial Physical Uplink Shared Channel (PUSCH) resource configuration for a Message A (msgA) transmission a dynamic part of the PUSCH resource configuration for the msgA transmission;
- transmit, to a base station, the preamble of msgA;
- and
- transmit, to the base station, the PUSCH message of msgA using PUSCH resources indicated by the dynamic part of the PUSCH resource configuration.
The UE according to claim 37, wherein the the dynamic part of the PUSCH resource configuration comprises one of:
- a time domain resource allocation;
- or
- a frequency domain resource allocation.
-44. (canceled)
A base station configured to support two-step, contention-free random access, the method comprising:
- communication circuitry configured for communication with a user equipment (UE) over a wireless communication channel;
- and
- processing circuitry configured to, in conjunction with the communication circuitry:
- transmit, to a user equipment (UE) a partial Physical Uplink Shared Channel (PUSCH) resource configuration for a Message A (msgA) transmission including a dynamic part of the PUSCH resource configuration for the msgA transmission;
- receive, from the UE, the preamble of msgA;
- and
- receive, from the UE, the PUSCH message of msgA according to the PUSCH resource configuration.
-50. (canceled)
A user equipment (UE) configured to perform two-step, contention-free random access, the UE comprising:
- communication circuitry configured for communication with a base station over a wireless communication channel;
- and
- processing circuitry configured to, in conjunction with the communication circuitry:
- receive, via dedicated Radio Resource Control (RRC) signaling, a Physical Uplink Shared Channel (PUSCH) resource identifier indicative of a dedicated PUSCH resource for a Message A (msgA) transmission, wherein msgA includes a preamble and a PUSCH message;
- transmit, to a base station, the preamble of msgA;
- and
- transmit, to the base station, the PUSCH message of msgA using the PUSCH resources indicated by the PUSCH resource identifier.
-56. (canceled)
A base station configured to support two-step, contention-free random access, the base station comprising:
- communication circuitry configured for communication with a user equipment (UE) over a wireless communication channel;
- and
- processing circuitry configured to, in conjunction with the communication circuitry:
- transmit, to a user equipment (UE) via dedicated Radio Resource Control (RRC) signaling, a Physical Uplink Shared Channel (PUSCH) resource identifier indicative of a dedicated PUSCH resource for a Message A (msgA) transmission, wherein msgA includes a preamble and a PUSCH message;
- receive, from the UE, the preamble of msgA;
- and
- receive, from the UE, the PUSCH message of msgA using the PUSCH resources indicated by the PUSCH resource identifier.
-60. (canceled)
Dependencies are inferred from the claim text.