Reception scheme
A method comprising: configuring a user equipment in a low activity state to operate according to a grant-free uplink transmission scheme; and in response to detecting at least one condition, scheduling a discontinuous reception state at the user equipment, during which the user equipment is configured to monitor for one or more messages intended for the user equipment.
1. A method, comprising:
while in a low activity state, wherein a user equipment is reachable by a mobile terminating data notification, is configured to operate according to a grant-free uplink transmission scheme, and is able to receive acknowledgement in response to an uplink data transmission performed without a specific scheduling from the network,
in response to detecting at least one condition, wherein the at least one condition is during a time window for receiving the acknowledgement for the uplink data transmission,
entering a discontinuous reception active state for monitoring for one or more messages intended for the user equipment, wherein
the monitoring for one or more messages comprises monitoring a physical downlink control channel, and
the monitoring the physical downlink control channel comprises monitoring for a random access radio network temporary identifier (RA-RNTI) if the one or more messages is group based, or monitoring for a cell radio network temporary (C-RNTI) identifier if the one or more messages is user equipment specific.
2. The method according to claim 1 , wherein the at least one condition comprises the response window, the response window comprising a time frame during which a downlink message is expected in response to an uplink message sent by the user equipment according to the grant-free uplink transmission scheme.
3. The method according to claim 1 , wherein the timer comprises a discontinuous reception inactivity timer or a discontinuous reception retransmission timer.
4. The method according to claim 1 , wherein the user equipment is configured to restart the timer in response to determining that there is a message intended for the user equipment.
5. The method as set forth in claim 1 , wherein the monitoring for one or more messages comprises monitoring for one or more of:
a response to an uplink message sent by the user equipment according to the grant-free uplink transmission scheme;
a mobile terminating data notification.
6. The method as set forth in claim 1 , wherein the monitoring the physical downlink control channel further comprises monitoring for a paging radio network temporary identifier (P-RNTI) in order to check for the presence of a paging message.
7. The method as set forth claim 1 , wherein the low activity state comprises an inactive or idle state.
8. The method as set forth in claim 1 , wherein the user equipment is operating in a fifth generation or new radio network.
9. An apparatus, comprising:
at least one processor; and
at least one memory including computer program code, wherein the at least one memory and the computer program code are configured, with the at least one processor, to:
while in a low activity state, wherein the apparatus is reachable by a mobile terminating data notification, is configured to operate according to a grant-free uplink transmission scheme, and is able to receive acknowledgement in response to an uplink data transmission performed without a specific scheduling from the network,
in response to detecting at least one condition, wherein the at least one condition is during a time window for receiving the acknowledgement for the uplink data transmission,
enter in a discontinuous reception active state for monitoring for one or more messages intended for the apparatus, wherein
the monitoring for one or more messages comprises monitoring a physical downlink control channel, and
the monitoring the physical downlink control channel comprises monitoring for a random access radio network temporary identifier (RA-RNTI) if the one or more messages is group based, or monitoring for a cell radio network temporary (C-RNTI) identifier if the one or more messages is user equipment specific.
10. The apparatus according to claim 9 , wherein the at least one condition comprises the response window, the response window comprising a time frame during which a downlink message is expected in response to an uplink message sent by the apparatus according to the grant-free uplink transmission scheme.
11. The apparatus according to claim 9 , wherein the timer comprises a discontinuous reception inactivity timer or a discontinuous reception retransmission timer.
12. The apparatus according to claim 9 , wherein the apparatus is configured to restart the timer in response to determining that there is a message intended for the apparatus.