Transmitting a physical downlink shared channel after losing uplink synchronization
Apparatuses, methods, and systems are disclosed for transmitting a physical downlink shared channel after losing uplink synchronization. One method includes: transmitting first downlink control information that schedules a physical downlink control channel order; transmitting second downlink control information that schedules a physical downlink shared channel transmission; transmitting the physical downlink control channel order based on the first downlink control information; transmitting the physical downlink shared channel transmission based on the second downlink control information, wherein the physical downlink control channel order and at least a portion of the physical downlink shared channel transmission are transmitted after a remote unit loses an uplink synchronization and before the remote unit completes a physical random access channel procedure.
1. A method comprising:
transmitting first downlink control information that schedules a physical downlink control channel order;
transmitting second downlink control information that schedules a physical downlink shared channel transmission;
transmitting the physical downlink control channel order based on the first downlink control information; and
transmitting the physical downlink shared channel transmission based on the second downlink control information, wherein:
the physical downlink control channel order and at least a portion of the physical downlink shared channel transmission are transmitted after a remote unit loses an uplink synchronization and before the remote unit completes a physical random access channel procedure;
the physical downlink shared channel transmission comprises a radio resource control reconfiguration message; and
the radio resource control reconfiguration message comprises information indicating which physical uplink control channel resources to use for transmitting feedback corresponding to the physical downlink shared channel transmission, and the information indicating which physical uplink control channel resources to use for transmitting feedback comprises information indicating:
to transmit feedback prior to uplink synchronization; or
to waft to transmit feedback until after uplink synchronization.
2. The method of claim 1 , wherein the first downlink control information and the second downlink control information are carried within a same downlink control information format.
3. The method of claim 2 , wherein a field of the same downlink control information format indicates the physical downlink shared channel transmission.
4. The method of claim 2 , wherein a reserved portion of the same downlink control information format indicates scheduling information for the physical downlink shared channel transmission.
5. The method of claim 2 , wherein a reserved portion of the same downlink control information format indicates a channel state information request.
6. The method of claim 2 , wherein a radio network temporary identifier indicates whether the same downlink control information format comprises the second downlink control information.
7. The method of claim 1 , wherein the physical downlink shared channel transmission comprises only one transport block.
8. The method of claim 1 , wherein the physical downlink shared channel transmission comprises a plurality of transport blocks.
9. The method of claim 1 , wherein the first downlink control information and the second downlink control information are part of separate downlink control information transmissions, and the remote unit is configured to detect the separate downlink control information transmissions.
10. The method of claim 9 , wherein the separate downlink control information transmissions are both addressed to a same radio network temporary identifier.
11. The method of claim 9 , wherein the separate downlink control information transmissions are addressed to different radio network temporary identifiers.
12. An apparatus comprising:
a transmitter that:
transmits first downlink control information that schedules a physical downlink control channel order;
transmits second downlink control information that schedules a physical downlink shared channel transmission;
transmits the physical downlink control channel order based on the first downlink control information; and
transmits the physical downlink shared channel transmission based on the second downlink control information, wherein:
the physical downlink control channel order and at least a portion of the physical downlink shared channel transmission are transmitted after a remote unit loses an uplink synchronization and before the remote unit completes a physical random access channel procedure;
the physical downlink shared channel transmission comprises a radio resource control reconfiguration message; and
the radio resource control reconfiguration message comprises information indicating which physical uplink control channel resources to use for transmitting feedback corresponding to the physical downlink shared channel transmission, and the information indicating which physical uplink control channel resources to use for transmitting feedback comprises information indicating:
to transmit feedback prior to uplink synchronization; or
to wait to transmit feedback until after uplink synchronization.
13. A method comprising:
receiving first downlink control information that schedules a physical downlink control channel order;
receiving second downlink control information that schedules a physical downlink shared channel transmission;
receiving the physical downlink control channel order based on the first downlink control information; and
receiving the physical downlink shared channel transmission based on the second downlink control information, wherein:
the physical downlink control channel order and at least a portion of the physical downlink shared channel transmission are received after a remote unit loses an uplink synchronization and before the remote unit completes a physical random access channel procedure;
the physical downlink shared channel transmission comprises a radio resource control reconfiguration message; and
the radio resource control reconfiguration message comprises information indicating which physical uplink control channel resources to use for transmitting feedback corresponding to the physical downlink shared channel transmission, and the information indicating which physical uplink control channel resources to use for transmitting feedback comprises information indicating:
to transmit feedback prior to uplink synchronization; or
to wait to transmit feedback until after uplink synchronization.
14. The method of claim 13 , wherein the first downlink control information and the second downlink control information are carried within a same downlink control information format.
15. The method of claim 14 , wherein a field of the same downlink control information format indicates the physical downlink shared channel transmission.
16. The method of claim 14 , wherein a reserved portion of the same downlink control information format indicates scheduling information for the physical downlink shared channel transmission.
17. The method of claim 14 , wherein a radio network temporary identifier indicates whether the same downlink control information format comprises the second downlink control information.
18. The method of claim 13 , wherein the first downlink control information and the second downlink control information are part of separate downlink control information transmissions, and the remote unit is configured to detect the separate downlink control information transmissions.
19. The method of claim 18 , wherein the separate downlink control information transmissions are both addressed to a same radio network temporary identifier.
20. An apparatus comprising:
a receiver that:
receives first downlink control information that schedules a physical downlink control channel order;
receives second downlink control information that schedules a physical downlink shared channel transmission;
receives the physical downlink control channel order based on the first downlink control information; and
receives the physical downlink shared channel transmission based on the second downlink control information, wherein:
the physical downlink control channel order and at least a portion of the physical downlink shared channel transmission are received after the apparatus loses an uplink synchronization and before the apparatus completes a physical random access channel procedure;
the physical downlink shared channel transmission comprises a radio resource control reconfiguration message; and
the radio resource control reconfiguration message comprises information indicating which physical uplink control channel resources to use for transmitting feedback corresponding to the physical downlink shared channel transmission, and the information indicating which physical uplink control channel resources to use for transmitting feedback comprises information indicating:
to transmit feedback prior to uplink synchronization; or
to wait to transmit feedback until after uplink synchronization.