Two-step random access
AssigneeTelefonaktiebolaget LM Ericsson (publ)
InventorsJonas SEDIN, Zhipeng LIN, Johan RUNE
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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.
Claims16
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.
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.
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.
Dependencies are inferred from the claim text.