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US 12,588,097 B2Granted
Data transmission in an inactive state
AssigneeApple Inc.
InventorsVivek G. Gupta, Sridhar Prakasam
Life of this patent
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Abstract
The present application relates to small data transmission (SDT). In an example, SDT is available for transferring information between a UE and a network, where a NAS layer of the UE is in a 5GMM-CONNECTED mode with an RRC inactive indication and an AS layer of the UE is in an RRC_INACTIVE state. To do so, the UE can be pre-configured to classify the information as qualifying for SDT. In addition, resources can be pre-configured for the SDT. For instance, the UE can maintain a set of radio bearers in a suspended state. While the NAS layer is in the 5GMM-CONNECTED mode with the inactive indication and the AS layer is in the RRC_INACTIVE state, one or more of the pre-configured resources can be used to transmit the information between the UE and the network.
Claims19
A method comprising:
- processing, at a user equipment (UE) side device, while operating in a fifth generation mobility management (5GMM)-CONNECTED mode with a radio resource control (RRC) inactive indication and in a RRC_INACTIVE state, a paging message of a network, the paging message indicating that transmission of downlink data is available and is to use one or more radio bearers configured for small data transmission (SDT);
- initiating, at the UE side device, while operating in the 5GMM-CONNECTED mode with the RRC inactive indication and in the RRC_INACTIVE state, reception of the downlink data based on the paging message and a configuration, wherein the configuration is defined in association with the 5GMM-CONNECTED mode with the RRC inactive indication and with the RRC_INACTIVE state and indicates the one or more radio bearers to use for the reception;
- determining, at the UE side device, after the downlink data is received, to continue operating in the 5GMM-CONNECTED mode with the RRC inactive indication and in the RRC_INACTIVE state;
- processing, at the UE side device, a service accept message associated with a service request for transmitting data;
- determining, at the UE side device, based on the service accept message, that the RRC_INACTIVE state is to be maintained;
- and
- continuing, at the UE side device, to operate in the 5GMM-CONNECTED mode with the RRC inactive indication and in the RRC_INACTIVE state.
4 more elements
One or more non-transitory computer-readable media storing instructions that, upon execution operations comprising:
- Processing, at a user equipment (UE) side device, while a non-access stratum (NAS) layer is in a fifth generation mobility management (5GMM)-CONNECTED mode with a radio resource control (RRC) inactive indication and an access stratum (AS) layer of a user equipment (UE) is in a RRC_INACTIVE state, a paging message of a network, the paging message indicating that transmission of downlink data is available and is to use one or more radio bearers configured for small data transmission (SDT);
- initiating, at the UE side device, while the NAS layer is in the 5GMM-CONNECTED mode with the RRC inactive indication and the AS layer is in the RRC_INACTIVE state, reception of the downlink data based on the paging message and a configuration, wherein the configuration is defined in association with the 5GMM-CONNECTED mode with the RRC inactive indication and with the RRC_INACTIVE state and indicates the one or more radio bearers to use for the reception;
- determining, at the UE side device, after the downlink data is received, that the NAS layer is to remain in the 5GMM-CONNECTED mode with the RRC inactive indication and the AS layer is to remain in the RRC_INACTIVE state;
- processing, at the UE side device, a service accept message associated with a service request for transmitting data;
- determining, at the UE side device, based on the service accept message, that the RRC_INACTIVE state is to be maintained;
- and
- maintaining, at the UE side device, the NAS layer in the 5GMM-CONNECTED mode with the RRC inactive indication and the AS layer in the RRC_INACTIVE state.
4 more elements
A method comprising:
- generating, at a network side device and for transmission to a user equipment (UE) while a non-access stratum (NAS) layer of the UE is in a fifth generation mobility management (5GMM)-CONNECTED mode, an indication to the UE to transition an access stratum layer (AS) layer of the UE to a radio resource control (RRC) INACTIVE state;
- generating, at the network side device and for transmission to the UE, a configuration defined for the NAS layer in the 5GMM-CONNECTED mode with an RRC inactive indication and the AS layer in the RRC_INACTIVE state, the configuration indicating radio bearers to use for small data transmission (SDT);
- generating, at the network side device and for transmission to the UE, a paging message indicating that transmission of downlink data is available and is to use one or more of the radio bearers;
- generating, at the network side device and for transmission the UE based on the configuration, the downlink data while the NAS layer is in the 5GMM-CONNECTED mode with the RRC inactive indication and the AS layer is in the RRC_INACTIVE state;
- and
- generating, at the network side device and for transmission the UE and based on a service request of the UE for uplink transmission, a service accept message, wherein the service accept message causes the UE to remain in the 5GMM-CONNECTED mode with the RRC inactive indication and in the RRC_INACTIVE state.
3 more elements
Dependencies are inferred from the claim text.