Handling downlink and uplink collisions in half duplex frequency division duplex user equipment
A method performed by user equipment, UE, includes receiving a DL reception and transmitting an UL transmission, wherein there is a collision between the DL reception and the UL transmission. The method also includes prioritizing for processing the DL reception or the UL transmission by applying a particular prioritization rule of a plurality of prioritization rules depending upon a type of the DL reception and/or the UL transmission. The method further includes processing the DL reception or the UL transmission in response to applying the particular prioritization rule.
1 . A method performed by user equipment (UE) comprising:
receiving a downlink (DL) reception and transmitting an uplink (UL) transmission, wherein there is a collision between the DL reception and the UL transmission;
prioritizing for processing the DL reception or the UL transmission by applying a particular prioritization rule of a plurality of prioritization rules depending upon a type of the DL reception and/or the UL transmission;
processing the DL reception or the UL transmission in response to applying the particular prioritization rule, wherein prioritizing for processing the DL reception or UL transmission comprises prioritizing a dynamically scheduled DL reception by the UE in response to the UE being dynamically scheduled with the DL reception and semi-statically configured with a UL transmission occasion which overlap in time; and
canceling the UL transmission if the UL transmission occasion starts later than Tproc, 2 after an end of a downlink control information (DCI) scheduling the DL reception.
2 . The method of claim 1 , wherein prioritizing for processing the DL reception or UL transmission comprises prioritizing an earlier of the DL reception or the UL transmission; and wherein the method further comprises:
processing the earlier of the DL reception or the UL transmission until the processing is complete; and
processing another DL reception or UL transmission after completing the processing of the earlier of the DL reception or the UL transmission plus a predetermined switching time.
3 . The method of claim 1 , wherein prioritizing for processing the DL reception or UL transmission comprises prioritizing the DL reception or the UL transmission which is scheduled later in time in response to the UE being dynamically scheduled with the DL reception and the UL transmission which overlap in time domain, the method further comprising:
canceling processing of the DL reception or the UL transmission scheduled earlier in time.
4 . The method of claim 3 , wherein the DCI of the DL reception or the UL transmission which is scheduled later in time comprises an explicit cancellation indication to indicate to the UE to cancel an earlier scheduled one of the UL transmission or the DL reception.
5 . The method of claim 1 , wherein the UE prioritizes processing an earlier of the UL transmission or the DL reception in response to the UL transmission occasion not starting later than Tproc, 2 after the end of the DCI scheduling the DL reception or the UE does not expect to receive the dynamically scheduled DL reception.
6 . The method of claim 1 , wherein prioritizing for processing the DL reception or UL transmission comprises prioritizing a dynamically scheduled DL reception in response to the UE being dynamically scheduled with the DL reception and semi-statically configured with a UL transmission occasion which overlap in time, the method further comprising:
canceling processing of the UL transmission, if any, in symbols occurring after a number of symbols that is larger than or equal to Tproc, 2 after an end of DCI scheduling the DL reception.
7 . The method of claim 1 , wherein prioritizing for processing the DL reception or UL transmission comprises prioritizing by the UE a dynamically scheduled UL transmission in response to the UE being dynamically scheduled with the UL transmission and semi-statically configured with the DL reception occasion which overlap in time, the method further comprising:
ignoring or canceling processing of the DL reception occasion if the DL reception starts later than Tproc, 2 after the end of the DCI, otherwise, the UE prioritizes processing an earlier transmission or reception, or alternatively, the UE does not expect to transmit the dynamically scheduled UL transmission.
8 . The method of claim 1 , wherein prioritizing for processing the DL reception or UL transmission comprises prioritizing by the UE dynamically scheduled UL transmission in response to the UE being dynamically scheduled with the UL transmission and semi-statically configured with a DL reception occasion which overlap in time, the method further comprising:
canceling or ignoring processing of the DL reception occasion in symbols that occur after a number of symbols larger than or equal to Tproc, 2.
9 . The method of claim 1 , wherein prioritizing for processing the DL reception or UL transmission comprises prioritizing by the UE the UL transmission or the DL reception that starts earlier in overlapped occasions in response to the UE being configured to have both CG PUSCH and SPS PDSCH where one or more transmission and reception occasions overlap due to different periodicities in the uplink and the downlink, the method further comprising:
canceling or ignoring the UL transmission or DL reception that starts later in the overlapped occasion.
10 . The method of claim 9 , wherein canceling or ignoring the UL transmission or the DL reception comprises canceling an overlapped part of the UL transmission or DL reception.
11 . The method of claim 9 , canceling or ignoring the UL transmission or the DL reception comprises canceling at least one additional OFDM symbol to facilitate a downlink-to-uplink or an uplink-to-downlink switching.
12 . The method of claim 1 , wherein prioritizing for processing the DL reception or UL transmission comprises prioritizing by the UE the UL transmission or the DL reception that has a higher priority in overlapped occasions in response to the UE being configured to have both CG PUSCH and SPS PDSCH where one or more transmission and reception occasions overlap due to different periodicities in the uplink and the downlink, the method further comprising:
canceling or ignoring the UL transmission or the DL reception with a lower priority in an overlapped occasion.
13 . The method of claim 12 , wherein the canceling or ignoring comprises canceling an overlapped part of the UL transmission or the DL reception.
14 . The method of claim 12 , wherein the canceling or ignoring comprises canceling at least one additional OFDM symbol to facilitate downlink-to-uplink or uplink-to-downlink switching.
15 . The method of claim 1 , further comprising receiving, by the UE, any DL reception from a network node, or transmitting, by the UE, any UL transmission to a network node, that has been partially or completely canceled, ignored, or dropped.
16 . The method of claim 1 , further comprising receiving any DL data, or transmitting any UL data as a dynamic HARQ retransmission.
17 . The method of claim 1 , further comprising transmitting, by the UE, a HARQ-ACK feedback message in response to any DL data or any UL data being partially or completely canceled, ignored, or dropped by the UE.
18 . A communication device comprising:
processing circuitry; and
memory coupled with the processing circuitry, wherein the memory includes instructions that when executed by the processing circuitry causes the communication device to perform operations according to claim 1 .
19 . A communication device adapted to perform according to:
receive a downlink (DL) reception and transmitting an uplink (UL) transmission, wherein there is a collision between the DL reception and the UL transmission;
prioritize for processing the DL reception or the UL transmission by applying a particular prioritization rule of a plurality of prioritization rules depending upon a type of the DL reception and/or the UL transmission;
process the DL reception or the UL transmission in response to applying the particular prioritization rule, wherein prioritizing for processing the DL reception or UL transmission comprises prioritizing a dynamically scheduled DL reception by a user equipment (UE) in response to the UE being dynamically scheduled with the DL reception and semi-statically configured with a UL transmission occasion which overlap in time; and
cancel the UL transmission if the UL transmission occasion starts later than Tproc, 2 after an end of a downlink control information (DCI) scheduling the DL reception.
20 . A computer program product comprising a non-transitory storage medium including program code to be executed by processing circuitry of a communication device, whereby execution of the program code causes the communication device to perform operations according to:
receive a downlink (DL) reception and transmitting an uplink (UL) transmission, wherein there is a collision between the DL reception and the UL transmission;
prioritize for processing the DL reception or the UL transmission by applying a particular prioritization rule of a plurality of prioritization rules depending upon a type of the DL reception and/or the UL transmission;
process the DL reception or the UL transmission in response to applying the particular prioritization rule, wherein prioritizing for processing the DL reception or UL transmission comprises prioritizing a dynamically scheduled DL reception by a user equipment (UE) in response to the UE being dynamically scheduled with the DL reception and semi-statically configured with a UL transmission occasion which overlap in time; and
cancel the UL transmission if the UL transmission occasion starts later than Tproc, 2 after an end of a downlink control information (DCI) scheduling the DL reception.