Methods, apparatus and systems for interference management in a full duplex radio system
Methods, apparatus and systems for enabling interference avoidance, for example from self and neighboring interference are disclosed. In one representative method implemented in a Wireless Transmit/Receive Unit (WTRU) using time-frequency (TF) resources in first and second directions, the method includes comprising TF resource muting or symbol muting, by the WTRU, one or more TF resources for communication in the first direction based on information associated with a communication in the second direction or subframe shortening, by the WTRU, by one or more TF resources for communication in the first direction based on information associated with a communication in the second direction.
1. A method implemented by a Wireless Transmit/Receive Unit (WTRU), the method comprising:
receiving first information indicating a pattern of one or more timeslots, wherein each timeslot of the one or more timeslots is associated with one of a plurality of timeslot types, and wherein the plurality of timeslot types are configured to be used for any one or more of a first communication direction or a second communication direction;
receiving second information indicating that at least one of the one or more timeslots is associated with a Synchronization Signal (SS) transmission or Physical Broadcast Channel (PBCH) transmission in the first communication direction;
determining whether a scheduled transmission in the second communication direction would overlap with any symbol of the SS transmission or any symbol of the PBCH transmission in the first communication direction; and
on condition that the scheduled transmission would not overlap with any symbol of the SS transmission or any symbol of the PBCH transmission in the first communication direction, transmitting the scheduled transmission in the second communication direction in at least one timeslot from among the one or more timeslots.
2. The method of claim 1 , wherein the pattern indicates one or more timeslots associated with a first timeslot type for communication in the first communication direction, one or more timeslots associated with a second timeslot type for communication in the second communication direction, and one or more timeslots associated with a third timeslot type for communication in any of: the first communication direction or the second communication direction.
3. The method of claim 2 , wherein the pattern indicates a sequence of a first set of downlink timeslots of the first timeslot type for communication in the first communication direction, followed by a second set of uplink/downlink timeslots of the third timeslot type for communication in either the first direction or the second direction, followed by a third set of downlink uplink timeslots of the second timeslot type for communication in the second direction.
4. The method of claim 1 , further comprising:
receiving, by the WTRU in Downlink Control Information, third information indicating an uplink grant; and
determining, by the WTRU, whether to transmit a Physical Uplink Shared Channel (PUSCH) transmission or a Physical Uplink Control Channel (PUCCH) transmission in the second communication direction in a timeslot, based on at least the third information and a timeslot type of the timeslot.
5. The method of claim 1 , further comprising:
determining, by the WTRU, whether to transmit a Physical Uplink Shared Channel (PUSCH) transmission or a Physical Uplink Control Channel (PUCCH) transmission in the second communication direction in a timeslot, based on at least a grant and whether a collision is expected to occur in the timeslot between: (1) any of the PUSCH transmission or the PUCCH transmission in the second communication direction, and (2) the SS transmission or PBCH transmission in the first communication direction.
6. The method of claim 1 , further comprising:
receiving, by the WTRU in Downlink Control Information, third information indicating an uplink grant; and
determining, by the WTRU, whether to transmit a Physical Uplink Shared Channel (PUSCH) transmission or a Physical Uplink Control Channel (PUCCH) transmission in the second communication direction in a timeslot, based on at least the third information, a timeslot type of the timeslot and whether a collision is expected to occur in the timeslot between: (1) any of the PUSCH transmission or the PUCCH transmission in the second communication direction, and (2) the SS transmission or PBCH transmission in the first communication direction.
7. The method of claim 1 , wherein:
the first information is received via Radio Resource Control signaling or physical layer signaling, and
the SS transmission is any of a primary SS transmission or a secondary SS transmission.
8. The method of claim 1 , wherein the first communication direction is a downlink communication direction to the WTRU and the second communication direction is an uplink communication direction from the WTRU.
9. A Wireless Transmit/Receive Unit (WTRU), comprising:
a transmit/receive unit configured to:
receive first information indicating a pattern of one or more timeslots, wherein each timeslot of the one or more timeslots is associated with one of a plurality of timeslot types, and wherein the plurality of timeslot types are configured to be used for any one or more of a first communication direction or a second communication direction, and
receive second information indicating that at least one of the one or more timeslots is associated with a Synchronization Signal (SS) transmission or Physical Broadcast Channel (PBCH) transmission in the first communication direction; and
a processor configured to:
determine whether a scheduled transmission in the second communication direction would overlap with any symbol of the SS transmission or any symbol of the PBCH transmission in the first communication direction, and
on condition that the scheduled transmission would not overlap with any symbol of the SS transmission or any symbol of the PBCH transmission in the first communication direction, transmit the scheduled transmission in the second communication direction in at least one timeslot from among the one or more timeslots.
10. The WTRU of claim 9 , wherein the processor is configured to at least one of:
selectively timeslot mute transmissions associated with time-frequency (TF) resources of the second communication direction, the time-frequency resources corresponding to the at least one of the timeslots associated with the SS transmission or the PBCH transmission in the first communication direction; or
selectively mute a portion of the scheduled transmission in the second communication direction.
11. The WTRU of claim 10 , wherein the processor is configured to drop or shift a Physical Uplink Shared Channel (PUSCH) transmission or a Physical Uplink Control Channel (PUCCH) transmission to be carried by the TF resources of the muted timeslot.
12. The WTRU of claim 9 , wherein the pattern indicates one or more timeslots that are associated with a first timeslot type for communication in the first communication direction, one or more timeslots that are associated with a second timeslot type for communication in the second communication direction, and one or more timeslots associated with a third timeslot type for communication in any of: the first communication direction or the second communication direction.
13. The WTRU of claim 12 , wherein the pattern indicates a sequence of a first set of downlink timeslots of the first timeslot type for communication in the first communication direction, followed by a second set of uplink/downlink timeslots of the third timeslot type for communication in either the first direction or the second direction, followed by a third set of uplink timeslots of the second timeslot type for communication in the second direction.
14. The WTRU of claim 9 , wherein:
the transmit/receive unit is configured to receive in Downlink Control Information, third information indicating an uplink grant; and
the processor is configured to determine whether to transmit a Physical Uplink Shared Channel (PUSCH) transmission in the second communication direction in a timeslot, based on at least the third information and the timeslot type of the timeslot.
15. The WTRU of claim 9 , wherein the processor is configured to determine whether to transmit a Physical Uplink Shared Channel (PUSCH) transmission or a Physical Uplink Control Channel (PUCCH) transmission in the second communication direction in a timeslot, based on at least a grant and whether a collision is expected to occur in the timeslot between: (1) any of the PUSCH transmission or the PUCCH transmission in the second communication direction, and (2) the SS transmission or PBCH transmission in the first communication direction.
16. The WTRU of claim 9 , wherein:
the transmit/receive unit is configured to receive in Downlink Control Information, third information indicating an uplink grant; and
the processor is configured to determine whether to transmit a Physical Uplink Shared Channel (PUSCH) transmission in the second communication direction in a timeslot, based on at least the third information, a timeslot type of the timeslot and whether a collision is expected to occur in the timeslot between: (1) any of the PUSCH transmission or the PUCCH transmission in the second communication direction, and (2) the SS transmission or PBCH transmission in the first communication direction.
17. The WTRU of claim 9 , wherein:
the first information is received via Radio Resource Control signaling or physical layer signaling, and
the SS transmission is any of a primary SS transmission or a secondary SS transmission.
18. The WTRU of claim 9 , wherein the first communication direction is a downlink communication direction to the WTRU and the second communication direction is an uplink communication direction from the WTRU.
19. The method of claim 1 , comprising:
on condition that the scheduled transmission would overlap with any symbol of the SS transmission or the PBCH transmission in the first communication direction,
prior to the transmitting, muting at least a portion of the scheduled transmission in the second communication direction.
20. The WTRU of claim 9 , wherein:
on condition that the scheduled transmission would overlap with any symbol of the SS transmission or the PBCH transmission in the first communication direction,
the processor is configured to:
prior to the transmitting, mute at least a portion of the scheduled transmission in the second communication direction.
21. A method implemented by a Wireless Transmit/Receive Unit (WTRU), the method comprising:
receiving first information indicating a pattern of one or more timeslots, wherein each timeslot of the one or more timeslots is one of a plurality of timeslot types, and wherein the plurality of timeslot types are configured to be used for any of a first communication direction and a second communication direction;
receiving, second information indicating that at least one of the one or more timeslots is associated with a Synchronization Signal (SS) transmission or Physical Broadcast Channel (PBCH) transmission in the first communication direction;
determining, whether a scheduled transmission in the second communication direction would overlap with any symbol of the SS transmission or any symbol of the PBCH transmission in the first communication direction; and
on condition that the scheduled transmission would overlap with any symbol of the SS transmission or any symbol of the PBCH transmission in the first communication direction, not transmitting the scheduled transmission in the second communication direction in at least one timeslot from among the one or more timeslots.
22. A Wireless Transmit/Receive Unit (WTRU), comprising:
a transmit/receive unit configured to:
receive first information indicating a pattern of one or more timeslots, wherein each timeslot of the one or more timeslots is one of a plurality of timeslot types, and wherein the plurality of timeslot types are configured to be used for any of a first communication direction and a second communication direction;
receive second information indicating that at least one of the one or more timeslots is associated with a Synchronization Signal (SS) transmission or Physical Broadcast Channel (PBCH) transmission in the first communication direction; and
a processor configured to:
determine whether a scheduled transmission the second communication direction would overlap with any symbol of the SS transmission or any symbol of the PBCH transmission in the first communication direction; and
on condition that the scheduled transmission would overlap with any symbol of the SS transmission or any symbol of the PBCH transmission in the first communication direction, not transmit the scheduled transmission in the second communication direction in at least one timeslot from among the one or more timeslots.
23. The method of claim 1 , wherein one of the plurality of timeslot types comprises a flexible timeslot type configured for simultaneous transmission in an uplink direction and reception in a downlink direction.
24. The WTRU of claim 9 , wherein one of the plurality of timeslot types comprises a flexible timeslot type configured for simultaneous transmission in an uplink direction and reception in a downlink direction.