JP7296494B2 - USER EQUIPMENT AND WIRELESS COMMUNICATION METHOD - Google Patents

Description

The present disclosure relates to the field of wireless communications, and more particularly Uplink Control Information (UCI) for Bandwidth part (BWP) switching in NR (New Radio access technology). The present invention relates to user equipment (UE), base stations (gNBs) and wireless communication methods related to determining resources for .

BWP is a new concept defined by NR, and is composed of one or more consecutive physical resource blocks (PRBs) in the carrier frequency domain. Therefore, BWP can be viewed as a subdivision of carriers. For a particular user equipment (UE), this can be configured with multiple BWPs within a carrier. The current NR specification supports dynamic switching of BWP.

One non-limiting exemplary embodiment facilitates determination of resources for UCI for BWP switching in NR to reduce feedback delay and improve system performance.

In a first general aspect of the present disclosure, Downlink Control Information (DCI) for BWP switching from a first sub-band (BWP) to a second BWP is transmitted in slots from a base station. A receiver operative to receive and drop uplink control information (UCI) transmitted during the BWP switching period of the first BWP and choose the earliest available slot of the second BWP or the third BWP. A circuit operable to determine that a BWP switching period is from a slot in which DCI for BWP switching is received to the beginning of a second BWP in which the first BWP is switched according to the DCI; a transmitter operable to transmit the dropped UCI to the base station in the determined earliest available slot of the second BWP or the third BWP.

In a second general aspect of the disclosure, downlink control information (DCI) for BWP switching from a first sub-band (BWP) to a second BWP is transmitted in slots to the user equipment. A transmitter operable and a receiver operable to receive uplink control information (UCI) in the earliest available slot of a second BWP or a third BWP from a user equipment, and a receiver operative to decode the UCI. and a circuit operative wherein UCI transmitted in the BWP switching period of the first BWP is dropped by the user equipment, the earliest available slot of the second or third BWP is determined by the user equipment, and the BWP The switching period provides the base station from the slot in which the DCI for BWP switching is received by the user equipment to the start of the second BWP in which the first BWP is switched according to the DCI.

In a third general aspect of the present disclosure, receiving downlink control information (DCI) for BWP switching from a first sub-band (BWP) to a second BWP from a base station in slots; , dropping uplink control information (UCI) transmitted during the BWP switching period of the first BWP, and determining the earliest available slot of the second BWP or the third BWP, wherein: The BWP switching period is from the slot in which the DCI for BWP switching is received to the start of the second BWP in which the first BWP is switched according to the DCI, the steps of dropping and determining, the second BWP or and transmitting the dropped UCI to a base station in the determined earliest available slot of a third BWP.

In a fourth general aspect of the present disclosure, transmitting downlink control information (DCI) for BWP switching from a first sub-band (BWP) to a second BWP to the user equipment in slots. , receiving uplink control information (UCI) from the user equipment in the earliest available slot of the second BWP or the third BWP; decoding the UCI; The UCI transmitted during the switching period is dropped by the user equipment, the earliest available slot for the second or third BWP is determined by the user equipment, and the BWP switching period is such that the DCI for BWP switching is received by the user equipment. A wireless communication method for a base station is provided from the slot where the first BWP is switched according to DCI to the start of the second BWP where the first BWP is switched according to DCI.

Note that the general or specific embodiments may be implemented as systems, methods, integrated circuits, computer programs, storage media, or any selective combination thereof.

Further benefits and advantages of the disclosed embodiments will be apparent from the specification and drawings. Benefits and/or advantages may be obtained individually by means of various embodiments and features of the specification and drawings, all of which are intended to obtain one or more of such benefits and/or advantages. does not need to be provided.

The foregoing and other features of the present disclosure will become more fully apparent from the following description and appended claims, taken in conjunction with the accompanying drawings. Given that these drawings depict only some embodiments according to the disclosure and are therefore not to be considered limiting of its scope, the accompanying drawings are used to further illustrate the disclosure. will be described briefly and in detail.

FIG. 4 schematically illustrates an example scenario of HARQ-ACK drop for BWP switching; 2 is a block diagram of a portion of user equipment in accordance with an embodiment of the present disclosure; FIG. FIG. 4B schematically illustrates an example scenario of HARQ-ACK dropping for BWP switching, in accordance with an embodiment of the present disclosure; FIG. 4B schematically illustrates another example scenario of HARQ-ACK dropping for BWP switching, in accordance with an embodiment of the present disclosure; Figure 5 schematically shows the placement of PUCCH in slot N+5 of Figure 4; FIG. 4B schematically illustrates another example scenario of HARQ-ACK dropping for BWP switching, in accordance with an embodiment of the present disclosure; FIG. 4B schematically illustrates another example scenario of HARQ-ACK dropping for BWP switching, in accordance with an embodiment of the present disclosure; FIG. 4B schematically illustrates another example scenario of HARQ-ACK dropping for BWP switching, in accordance with an embodiment of the present disclosure; FIG. 4 schematically illustrates an example scenario of CSI drop for BWP switching, in accordance with an embodiment of the present disclosure; Figure 3 is a block diagram of a portion of a base station according to an embodiment of the present disclosure; 2 is a detailed block diagram of user equipment in accordance with an embodiment of the present disclosure; FIG. Figure 3 is a detailed block diagram of a base station in accordance with an embodiment of the present disclosure; Figure 2 schematically illustrates an example flow chart of communication between a base station and user equipment, in accordance with an embodiment of the present disclosure; 4 is a flow chart of a wireless communication method for user equipment according to an embodiment of the present disclosure; 4 is a flow chart of a wireless communication method for a base station according to an embodiment of the present disclosure;

The following detailed description refers to, and forms a part of, the accompanying drawings. In the drawings, similar symbols typically identify similar components, unless context dictates otherwise. It will be readily understood that aspects of the present disclosure can be arranged, permuted, combined and designed in a wide variety of different configurations, all of which are expressly contemplated and form part of the present disclosure.

The latest specification 38.213_v2.0.0 states, "For paired spectrum operation, the UE shall be active between the detection of DCI format 1_1 and the transmission of the corresponding HARQ-ACK. It is not expected that the UE will send HARQ-ACK when changing the UL BWP." This behavior degrades performance due to Hybrid Automatic Repeat request-Acknowledgement (HARQ-ACK) drops. Although the standard only describes the case of paired frequency bands, the above behavior would also apply to the unpaired spectrum case for the same reasons. FIG. 1 schematically illustrates an exemplary scenario of HARQ-ACK dropping for BWP switching, taking unpaired frequency bands as an example. In FIG. 1, the horizontal axis indicated by "T" represents the time axis, and the vertical axis indicated by "F" represents the frequency axis. Along the time axis, N−1, N, N+1, . . . , N+10 represent slots. Assume that there are two BWPs on one carrier, as indicated by "BWP1" and "BWP2" along the frequency axis. Further, a box filled with left slashes from upper left to lower right represents a physical downlink shared channel (PDSCH), and a box filled with right slashes from upper right to lower left. represents a physical downlink control channel (PDCCH).

As shown in FIG. 1, the UE is receiving the PDSCH in slots N−1 and N. Based on the timing indicated in the scheduled downlink control information (DCI), the UE will feed back the HARQ-ACK over the Physical Uplink Control Channel (PUCCH) in slots N+2 and N+3 respectively. It's becoming Here, the timing is indicated by K1 in FIG. 1, which is the timing from PDSCH to HARQ-ACK as indicated by the arrows from slot N−1 to slot N+2 and from slot N to slot N+3. means However, since the UE is receiving DCI for BWP switching in slot N+1, all slots N+1 to N+4 of the BWP switching period should be used to prepare for BWP switching according to the current specification of NR. Therefore, in preparation for BWP switching, it is necessary to drop the HARQ-ACKs originally sent in slots N+2 and N+3. In this case, since these HARQ-ACKs are not received, the Base Station (BS) may retransmit the PDSCH on BWP2, which affects the aggregate throughput and causes performance degradation.

In order to solve the above problem, one prior art method is to use the timing indicated by DCI (Downlink (DL) assignment or Uplink (UL) grant) for BWP switching in BWP2. Transmit the dropped HARQ-ACK in a slot determined based on. However, in this prior art method, the HARQ-ACK delay can be long and it is unclear how to handle the case of paired frequency bands.

In view of the above, one embodiment of the present disclosure provides a user equipment as shown in FIG. FIG. 2 shows a block diagram of a portion of user equipment 200 according to one embodiment of the disclosure. As shown in FIG. 2, UE 200 may include receiver 210 , circuitry 220 and transmitter 230 . Receiver 210 is operable to receive downlink control information (DCI) for sub-band (BWP) switching from a first BWP to a second BWP from a base station in slots. Circuitry 220 operates to drop uplink control information (UCI) transmitted during the BWP switching period of the first BWP and determine the earliest available slot of the second BWP or the third BWP. . A BWP switching period is from the slot in which the DCI for BWP switching is received to the start of the second BWP in which the first BWP is switched according to the DCI. Transmitter 230 operates to transmit the dropped UCI to the base station in the determined earliest available slot of the second BWP or the third BWP.

Specifically, refer again to FIG. 1 for ease of understanding. In FIG. 1, the first BWP is BWP1. As before, the UE receives DCI for BWP switching from the BS in slot N+1 of BWP1. As shown in FIG. 1, the slot receiving DCI for BWP switching is slot N+1, and the BWP is switched from BWP1 to BWP2 in slot N+5. Therefore, the second BWP is BWP2 and the BWP switching period is from slot N+1 to slot N+4, which is the slot immediately preceding slot N+5. Here, we assume that slots N+2 and N+3 within the BWP switching period (from slot N+1 to slot N+4) need to be used by the UE to prepare for BWP switching, so Any HARQ-ACK that is According to this disclosure, the dropped HARQ-ACK may be sent in the earliest available slot of BWP2, eg, slot N+5. Clearly slot N+5 is later than slots N+2 and N+3.

In addition, the current specification of NR states that all slots in the BWP switching period should be used to prepare for BWP switching and should not transmit UCI, but in practice, preparing for BWP switching requires less Sometimes you don't need many slots. Therefore, during the BWP switching period, UCIs that were originally transmitted in slots not intended for BWP switching need not be dropped, which will be explained in detail later.

Furthermore, the dropped UCI can be sent not only on the second BWP, but also on the third BWP, which will be explained in detail later.

In the user equipment 200 shown in FIG. 2, in case of BWP switching, the earliest available slot of the new BWP different from the original BWP is used to transmit the dropped UCI originally transmitted in the original BWP. As such, the feedback delay can be shortened and the performance of the system can be improved.

According to one embodiment of the present disclosure, in the UE 200 shown in FIG. 2, the earliest available slot of the second BWP or the third BWP is defined in the standard or slot format indicator (SFI) ) and/or configured by Radio Resource Control (RRC).

Specifically, the earliest available slot of the second BWP or third BWP may be specified in the standard, e.g., the first slot of the second BWP or third BWP (e.g., BWP2 in FIG. slot N+5). Alternatively, the earliest available slot of the second BWP or the third BWP can be set by RRC from the BS. Alternatively, the earliest available slot of the second BWP or third BWP may also depend on the SFI. For example, if the SFI in slot N+5 indicates that the current slot is all DL symbols and cannot transmit PUCCH, then the next slot that may have UL symbols for PUCCH (slot N+6) is for PUCCH transmission. available, i.e. serves as the earliest available slot of the second BWP. Clearly, the earliest available slot of the second BWP or the third BWP can be determined based on the combination of RRC and SFI. For example, a range of slots that may serve as the earliest available slots of the second BWP or the third BWP may be configured by RRC, and one slot in that range may be assigned by the SFI to the earliest available slot of the third BWP. It can be indicated as an available slot.

The earliest available slot of the second BWP or third BWP is not limited to the first slot of the second BWP or third BWP, but instead any other suitable slot depending on the particular circumstances. slot. Please note that

According to one embodiment of the present disclosure, in the UE 200 shown in FIG. 2, all slots of the BWP switching period are used for BWP switching.

Specifically, as noted above, the current specification of NR stipulates that all slots in the BWP switching period be used to prepare for BWP switching and not transmit UCI. Therefore, in view of the current specification of NR, the disclosure will first be described by some examples as follows.

FIG. 3 schematically illustrates an example scenario of HARQ-ACK drop for BWP switching, according to one embodiment of the present disclosure. In FIG. 3, the horizontal axis indicated by "T" represents the time axis, and the vertical axis indicated by "F" represents the frequency axis. Along the time axis, N−1, N, N+1, . . . , N+10 represent slots. Assume that there are two BWPs on one carrier, as indicated by "BWP1" and "BWP2" along the frequency axis. In addition, the top-left to bottom-right hatched box represents PDSCH, the top-right to bottom-left hatched box represents PDCCH, and the vertical-filled box represents PUCCH. A filled box represents a HARQ-ACK.

As shown in FIG. 3, the UE is receiving the PDSCH in slots N−1 and N. Based on the timing indicated in the scheduled DCI, the UE is supposed to feed back HARQ-ACK over PUCCH in slots N+2 and N+3 respectively. Here, the timing is indicated by K1 in FIG. 3, which is the timing from PDSCH to HARQ-ACK as indicated by the arrows from slot N−1 to slot N+2 and from slot N to slot N+3. means However, since the UE is receiving DCI for BWP switching in slot N+1, all slots N+1 to N+4 of the BWP switching period are either radio frequency (RF) or baseband, according to the current specification of NR. should be used to prepare for BWP switching of Therefore, it is necessary to drop the HARQ-ACKs originally sent in slots N+2 and N+3, as indicated by the double crosses for the HARQ-ACKs in slots N+2 and N+3.

Also assume that the DCI for BWP switching in slot N+1 schedules the PDSCH in slot N+6, as indicated by the arrow from slot N+1 to slot N+6. We refer to such timing as K0, which means the timing from PDCCH to PDSCH. This also means that the DCI for BWP switching in slot N+1 is used for DL assignment. Further, based on the timing K1 (PDSCH->PUCCH) indicated by the arrow from slot N+6 to slot N+9, the UE needs to feed back HARQ-ACK over PUCCH in slot N+9 for PDSCH in slot N+6.

According to this disclosure, the earliest available slot for BWP2 is slot N+5, so the dropped HARQ-ACKs from slots N+2 and N+3 are transmitted over PUCCH in slot N+5, as indicated by the arc arrows. . However, according to the prior art method, the dropped HARQ-ACKs from slots N+2 and N+3 are , is transmitted on the PUCCH in slot N+9. Thus, according to the present disclosure, the feedback delay can be reduced without impacting the DCI scheduled timing for BWP switching.

FIG. 4 schematically illustrates another exemplary scenario of HARQ-ACK drop for BWP switching, according to one embodiment of the present disclosure. In FIG. 4, the horizontal axis indicated by "T" represents the time axis, and the vertical axis indicated by "F" represents the frequency axis. Along the time axis, N−1, N, N+1, . . . , N+10 represent slots. Assume that there are two BWPs on one carrier, as indicated by "BWP1" and "BWP2" along the frequency axis. Furthermore, the box filled with left diagonal lines represents PDSCH, the box filled with right diagonal lines represents PDCCH, the box filled with vertical lines represents PUCCH, and the box filled with crossed lines represents HARQ-ACK. , and a box filled with horizontal lines represents PUSCH.

Similar to FIG. 3, in FIG. 4 the UE is receiving the PDSCH in slots N−1 and N. Based on the timing indicated in the scheduled DCI (K1 (PDSCH->HARQ-ACK)), the UE is supposed to feed back HARQ-ACK over PUCCH in slots N+2 and N+3 respectively. However, since the UE is receiving DCI for BWP switching in slot N+1, all slots N+1 to N+4 of the BWP switching period are used for radio frequency (RF) or baseband BWP switching according to the current specification for NR. should be used in the preparation of Therefore, it is necessary to drop the HARQ-ACKs originally sent in slots N+2 and N+3, as indicated by the double crosses for the HARQ-ACKs in slots N+2 and N+3.

Also assume that PUSCH is scheduled in slot N+7 by DCI for BWP switching in slot N+1, as indicated by the arrow from slot N+1 to slot N+7. Such timing is called K2 and means the timing from PDCCH to PUSCH. This also means that the DCI for BWP switching in slot N+1 is used for the UL grant.

According to this disclosure, the earliest available slot for BWP2 is slot N+5, so the dropped HARQ-ACKs from slots N+2 and N+3 are transmitted in slot N+5, as indicated by the arc arrows. Since there is a PUSCH transmitted in the same slot N+5, HARQ-ACK is multiplexed on such PUSCH. However, according to the prior art method, the dropped HARQ-ACKs from slots N+2 and N+3 are , is multiplexed on PUSCH and transmitted in slot N+7. Thus, according to the present disclosure, the feedback delay can be reduced without impacting the DCI scheduled timing for BWP switching.

Note that the dropped HARQ-ACKs from slots N+2 and N+3 may also be sent on PUCCH in slot N+5 if there is no PUSCH scheduled in slot N+5 for the UL.

According to one embodiment of the present disclosure, in the UE 200 shown in FIG. 2, the dropped UCI is transmitted on the physical uplink control channel (PUCCH) in the earliest available slot of the second BWP or the third BWP. or multiplexed onto the Physical Uplink Shared Channel (PUSCH) and transmitted in the earliest available slots of the second or third BWP.

Specifically, as shown in slot N+5 in FIG. 3 or FIG. 4, HARQ-ACKs dropped from slots N+2 and N+3 are transmitted on PUCCH in slot N+5 or multiplexed on PUSCH in slot N+5. can be sent.

According to one embodiment of the present disclosure, in UE 200 shown in FIG. 2, DCI is for DL assignment or UL grant.

Specifically, FIG. 3 shows the case where the DCI for BWP switching received at slot N+1 is for DL assignment, whereas FIG. The case is shown for UL grant. In addition, for example, as described above with reference to FIGS. 3 and 4, dropped HARQ-ACKs are handled differently for BWP-switching UL grants and BWP-switching DL assignments. can be processed with

According to one embodiment of the present disclosure, in UE 200 shown in FIG. 2, DCI for BWP switching is received at the first BWP.

Specifically, in both FIGS. 3 and 4, the first BWP is BWP1, which is the case of Time Division Duplexing (TDD) where the UL and DL share the same BWP (non for paired frequency bands).

According to one embodiment of the present disclosure, in the UE 200 shown in FIG. 2, the PUCCH resource location for transmitting the dropped UCI in the earliest available slot of the second BWP or the third BWP is determined by the RRC configuration , specification of standards, implicit indication by Control Channel Element (CCE) index of physical downlink control channel (PDCCH), hybrid automatic repeat request-acknowledgement (HARQ-ACK) resource indicator (ARI: explicit indication by the Acknowledgment resource indicator) and one or more of the UE ID.

Specifically, as shown in FIG. 3, the dropped HARQ-ACKs from slots N+2 and N+3 are transmitted on PUCCH in slot N+5. FIG. 5 schematically shows the placement of PUCCH in slot N+5 of FIG. In FIG. 5, as an example, two slots N+5 and N+6 are shown along the time axis, and PUCCH#1, PUCCH#2, PUCCH#3, and PUCCH#4 are shown in order in slot N+5 along the frequency axis. ing.

Regarding the determination of the exact PUCCH resource location (i.e., PUCCH resource index) in slot N+5 used for transmission of HARQ-ACKs dropped from slots N+2 and N+3 (e.g., PUCCH #1 in slot N+5) as follows: Multiple methods may exist.
1) PUCCH resource index is based solely on RRC configuration. PUCCH#1 is configured as a resource for transmitting HARQ-ACKs dropped in the last BWP (eg, BWP1). To transmit HARQ-ACK for multiple slots, either bundling or multiplexing is possible and configurable.
2) The PUCCH resource index is specified in the standard. For example, PUCCH#1 is specified in the standard to transmit HARQ-ACKs dropped in the last BWP.
3) The PUCCH resource index is implicitly indicated by the CCE index of PDCCH. Such a PDCCH may either transmit DCI for BWP switching (eg, at slot N+1 in FIG. 3) or schedule the PDSCH (eg, at slot N−1 in FIG. 3). Assuming the CCE index of PDCCH is #2, PUCCH #2 in slot N+5 is used to transmit the dropped HARQ-ACKs from slots N+2 and N+3 in FIG.
4) PUCCH resource index is explicitly indicated by ARI in DCI. Such a DCI may be the DCI for BWP switching (eg, slot N+1 in FIG. 3) or the DCI that schedules the PDSCH (eg, slot N−1 or slot N in FIG. 3). For example, the DCI ARI indicates PUCCH #2, and PUCCH #2 is used to transmit the dropped HARQ-ACKs from slots N+2 and N+3 of FIG.
5) PUCCH resource index is based on UE ID. For example, the UE ID is 1000 and mod (UE ID, 4)+1 is used to determine the PUCCH resource index. PUCCH #1 is then used to transmit the dropped HARQ-ACKs, eg, from slots N+2 and N+3 of FIG.
6) Any combination of 1) to 5). For example, all 4 PUCCH resources (PUCCH#1 to PUCCH#4) are configured by RRC and one of them is used for HARQ-ACK transmission dropped in the last BWP (eg BWP1) ARI is used to indicate (PUCCH#1).

According to an embodiment of the present disclosure, in the UE 200 shown in FIG. 2, the resource locations of UCI multiplexed on the PUSCH are defined by standards.

Specifically, as shown in FIG. 4, HARQ-ACKs dropped from slots N+2 and N+3 are multiplexed and transmitted on PUSCH in slot N+5. The determination of the HARQ-ACK position within the PUSCH at slot N+5 may be defined in current specifications and may be the same as current NR standard 3GPP38.213.

According to one embodiment of the present disclosure, in UE 200 shown in FIG. 2, DCI for BWP switching is received on the 4th BWP, and the 1st BWP and the 4th BWP correspond to the same slot.

3 and 4 are both for TDD (ie, for unpaired frequency bands). However, the present disclosure applies not only to the TDD case, but may also be applicable to the Frequency Division Duplexing (FDD) case (ie, paired frequency bands).

FIG. 6 schematically illustrates another exemplary scenario of HARQ-ACK drop for BWP switching, according to one embodiment of the present disclosure. FIG. 6 is for FDD where the respective BWPs of the UL and DL are separate from each other, whereas in the TDD case (eg, FIGS. 3 and 4) the UL and DL share the same BWP. The same parts in FIG. 6 as in FIG. 4 are not described here to avoid redundancy. The only difference between them is that there is a pair of BWPs (DL BWP1 and UL BWP1) before BWP switching. So in this case, the first BWP is UL BWP1 and the fourth BWP is DL BWP1, but since UL BWP1 and DL BWP1 are paired, they are in the same slot (slot N-1 to slot N+4). ).

Similar to FIG. 4, in FIG. 6 the UE receives DCI for BWP switching used for UL grants in slot N+1. In other words, the DCI received by the UE in slot N+1 indicates UL BWP switching from UL BWP1 to the second BWP, UL BWP2, in slot N+5. In FIG. 6, the basic processing of HARQ-ACK transmission is the same as in FIG. That is, since the earliest available slot for UL BWP2 is slot N+5, the HARQ-ACKs dropped from slots N+2 and N+3 are multiplexed and transmitted on PUSCH, etc., in slot N+5, as indicated by the arrows in the arc. be. This allows the feedback delay to be reduced without impacting the DCI scheduled timing for BWP switching.

According to one embodiment of the present disclosure, in the UE 200 shown in FIG. 2, the first BWP is in the first carrier, the third BWP is in the second carrier, and the first BWP and the third of BWPs correspond to the same slot.

3, 4 and 6 all correspond to the single carrier case. However, the present disclosure applies not only to the single-carrier case, but may also be applicable to the multi-carrier case.

FIG. 7 schematically illustrates another example scenario of HARQ-ACK drop for BWP switching, according to one embodiment of the present disclosure. FIG. 7 is a case of Carrier Aggregation (CA) assuming that the UE is capable of two carriers (CC1 and CC2). In FIG. 7, BWP1 of CC1 and BWP2 of CC1 can be considered the same as BWP1 and BWP2 of FIG. The same parts in FIG. 7 as in FIG. 3 are not described here to avoid redundancy. The difference between them is that in FIG. 7, instead of sending the dropped HARQ-ACKs from slots N+2 and N+3 of BWP1 of CC1 in slot N+5 of BWP2 in the same carrier CC1, the UE sends such HARQ-ACKs , on the other carrier CC2 but in the same slot. As shown in FIG. 7, HARQ-ACK dropped from slot N+2 of BWP1 of CC1 is transmitted in slot N+2 of BWP1 of CC2, and HARQ-ACK dropped from slot N+3 of BWP1 of CC1 is transmitted in BWP1 of CC2. is transmitted in slot N+3 of . In other words, the HARQ-ACKs originally sent in slots N+2 and N+3 of BWP1 of CC1 are shifted to slots N+2 and N+3 of BWP1 of CC2, respectively. In this case, the first BWP is BWP1 of CC1, the third BWP corresponds to BWP1 of CC2, the second BWP is BWP2 of CC1, and the earliest available slot of the third BWP is: Corresponding to slots N+2 and N+3 of BWP1 of CC2. In other words, in this case the dropped UCI is sent in the earliest available slot of the third BWP, which means that the dropped UCI is sent in the earliest available slot of the second BWP. Different from the above case.

This has no impact on the HARQ-ACK timing in FIG. 7 compared to the above case (FIGS. 3, 4 and 6) where the dropped HARQ-ACK is sent in slot N+5.

Note that although FIG. 7 shows the TDD case (i.e., the unpaired frequency band case), the present disclosure is not so limited and may also be applicable for FFD and CA cases. want to be Also note that such HARQ-ACK shifting is not limited to the same slot.

The earliest available slot of CC2's BWP1 may also depend on CC2's RRC configuration and/or SFI indication. For example, if configured by RRC to allow a particular PUCCH in slot N+4 of BWP1 of CC2 to be used for such HARQ-ACK shifting, HARQ-ACKs dropped from slots N+2 and N+3 of BWP1 of CC1 are , CC2 in slot N+4 of BWP1. Obviously, the earliest available slot of BWP1 of CC2 can also be specified in the standard. Clearly, in this case, the earliest available slot of BWP1 of CC2 must not be earlier than slots N+2 and N+3 respectively.

Note that FIG. 7 is for illustrative purposes only, and the present disclosure is not so limited. BWP1 of CC1 and BWP1 of CC2 do not necessarily correspond to the same slot, as the component carriers (CCs) may be different. For example, the length of each slot of BWP1 of CC1 may be different than that of BWP1 of CC2. In this case, determining to which slot of BWP1 of CC2 the dropped UCI from BWP1 of CC1 is shifted is equivalent to determining the earliest available slot of BWP1 of CC2. Also, as described above, the earliest available slot of BWP1 of CC2 may depend on the RRC configuration and/or SFI indication of CC2. According to one embodiment of the present disclosure, in the UE 200 shown in FIG. 2, there is no DCI for BWP switching received at the third BWP and/or one of the first BWP and the third BWP is The cell used for the Scell and the other used for the Pcell or configured cell and/or one of the first BWP and the third BWP is used is the Supplementary UL (SUL) is.

Specifically, in FIG. 7, BWP1 of CC2 is determined as the BWP for transmitting HARQ-ACKs dropped from BWP1 of CC1. Determining the CC/BWP index (eg, CC2/BWP1 in FIG. 7) for shifting dropped HARQ-ACKs is based on at least one of the following factors.
1) Whether the cell is a Pcell.
2) whether the cell is a configured cell;
3) Whether the cell includes BWP switching.
4) Whether the cell is SUL or non-SUL.

More specifically, in FIG. 7, if one of BWP1 of CC1 and BWP1 of CC2 is for Pcell and the other is for Scell, then BWP1 of CC2 sends HARQ-ACK dropped from BWP1 of CC1 can be determined to If one of CC1's BWP1 and CC2's BWP1 is for a cell dedicated as a backup for the other cell, then CC2's BWP1 is determined to send the dropped HARQ-ACK from CC1's BWP1. obtain. If there is no BWP switching in the cell of BWP1 of CC2, BWP1 of CC2 may be determined to send a dropped HARQ-ACK from BWP1 of CC1. If one of CC1's BWP1 and CC2's BWP1 is for a cell with SUL, which means UL only without DL, BWP1 of CC2 will send a dropped HARQ-ACK from BWP1 of CC1 can be determined.

Note that FIG. 7 is for illustrative purposes only, and the present disclosure is not so limited. Even for CA, UCI dropped from a CC is not necessarily shifted to another CC. Alternatively, the dropped UCI from CC1's BWP1 may also be shifted to the earliest available slot (eg, slot N+5) of CC1's BWP2. For example, if the above conditions are not met, the dropped UCI from BWP1 of CC1 cannot be shifted to BWP1 of CC2. Alternatively, in some cases, the BS or UE simply prefers to send the dropped UCI on CC1. Therefore, even for CA, the dropped UCI can be sent in the earliest available slot of the second BWP or the third BWP. Which rules are used can be configured by RRC or dictated by DCI.

According to one embodiment of the present disclosure, in the UE 200 shown in FIG. 2 , UCI transmitted in slots not used for BWP switching in the BWP switching period are not dropped by the user equipment and used for BWP switching in the BWP switching period. The number of slots to be used is specified in the standard or is set based on the BWP switching capabilities of the user equipment.

Specifically, Figures 3, 4, 6, and 7 all correspond to the case where all slots (from slot N+1 to slot N+4) are required to prepare for BWP switching according to the current specification of NR. do. However, only some of these slots may be sufficient to prepare for future BWP switching. The present disclosure also applies to the latter case.

FIG. 8 schematically illustrates another example scenario of HARQ-ACK drop for BWP switching, according to one embodiment of the present disclosure. Portions of FIG. 8 that are the same as those of FIG. 3 or FIG. 4 are not described here to avoid redundancy. The difference between FIG. 8 and either FIG. 3 or FIG. 4 is that only slot 4 of the BWP switching period is used to prepare for BWP switching, as indicated by the dotted solid box labeled "N+4". It is necessary to Therefore, there is no need to drop, delay, or shift the HARQ-ACKs originally sent in slots N+2 and N+3 of BWP1. Based on the indicated timing, HARQ-ACKs may be sent in slots N+2 and N+3, respectively. Similarly, although not shown in FIG. 7, if there are HARQ-ACKs that were originally sent in slot N+1 of BWP1, such HARQ-ACKs need not be dropped, delayed, or shifted.

Although not shown in FIG. 7, if there are HARQ-ACKs originally sent in slot N+4 of BWP1, such HARQ-ACKs must be dropped and the earliest available slots of other BWPs (eg slot N+5 of BWP2). The principle of such HARQ-ACK processing is basically the same as in FIGS. 3, 4, 6 and 7 and will not be described here to avoid redundancy.

In summary, whether the HARQ-ACK needs to be shifted depends on the UE's BWP switching time capability and/or slot length. The UE can report its BWP switching time capability and the base station implicitly or explicitly indicates the number of symbols/slots required for BWP switching. By doing so, there is no ambiguity between the UE and the base station.

According to one embodiment of the present disclosure, in the UE 200 shown in FIG. 2, the semi-static codebook size is set to the earliest available slot of the 2nd BWP or 3rd BWP considering the dropped UCI. determined for

Specifically, for the determination of the semi-static codebook size, the HARQ-ACK originally transmitted during the BWP switching period is also replaced by the slot for the actual HARQ-ACK transmission, i.e. the second BWP or the third Considered for the earliest available slot of the BWP. For example, prior to considering such proposals disclosed in this disclosure, a codebook size of 4 bits is determined. After considering such proposals disclosed in this disclosure, the codebook size would require 6 bits. An additional 2 bits are used for feedback of HARQ-ACKs dropped during the BWP switching time.

According to one embodiment of the present disclosure, in UE 200 shown in FIG. 2, UCI includes HARQ-ACK and/or Channel State Information (CSI).

Specifically, the above example assumes HARQ-ACK as the UCI, but the present disclosure is not limited thereto. The present disclosure is also applicable to CSI or other types of UCI.

FIG. 9 schematically illustrates an example scenario of CSI drop for BWP switching, according to one embodiment of the present disclosure. The same parts in FIG. 9 as in FIG. 3 are not described here to avoid redundancy. The difference between FIG. 9 and FIG. 3 is that CSI is originally transmitted in slot N+2 of BWP1, based on RRC configuration or previous DCI indications, as indicated by the gridded boxes. As with HARQ-ACK, the CSI transmitted in slot N+2 of BWP1 is dropped and transmitted in slot N+5 of BWP2.

Above, the UE 200 is described in detail with reference to FIGS. 1-9. In the UE 200, in the case of BWP switching, the feedback delay is reduced by transmitting the dropped UCI originally transmitted in the original BWP using the earliest available slot of the new BWP that is different from the original BWP. can be shortened and system performance can be improved.

Another embodiment of the present disclosure provides a base station as shown in FIG. FIG. 10 shows a block diagram of a portion of base station 1000 according to one embodiment of the present disclosure. As shown in FIG. 10, BS 1000 may comprise transmitter 1010 , receiver 1020 and circuitry 1030 . Transmitter 1010 operates to transmit downlink control information (DCI) for sub-band (BWP) switching from a first BWP to a second BWP in slots to user equipment. Receiver 1020 operates to receive uplink control information (UCI) from the user equipment in the earliest available slot of the second BWP or the third BWP. Circuitry 1030 operates to decode the UCI. The UCI sent in the BWP switching period of the first BWP is dropped by the user equipment, the earliest available slot of the second or third BWP is determined by the user equipment, and the BWP switching period is used for BWP switching. From the slot where the DCI is received by the user equipment to the start of the second BWP where the first BWP is switched according to the DCI. For example, the user equipment may be UE 200 shown in FIG.

According to one embodiment of the present disclosure, the earliest available slot of the second BWP or the third BWP is defined in a standard or indicated by a slot format indicator (SFI) and/or radio resource control (RRC).

According to one embodiment of the present disclosure, the dropped UCI is transmitted on the physical uplink control channel (PUCCH) in the earliest available slot of the second BWP or the third BWP, or are multiplexed onto the physical uplink shared channel (PUSCH) and transmitted in the earliest available slot of the first BWP or the third BWP.

According to one embodiment of the present disclosure, the PUCCH resource location for transmitting the dropped UCI in the earliest available slot of the second BWP or the third BWP depends on RRC configuration, standard specification, physical down Implicit indication by control channel element (CCE) index of link control channel (PDCCH), explicit indication by hybrid automatic repeat request-acknowledgement (HARQ-ACK) resource indicator (ARI) in DCI, and UE ID of Determined according to one or more.

According to an embodiment of the present disclosure, the resource location of UCI multiplexed on PUSCH is defined in the standard.

According to one embodiment of the present disclosure, DCI is for downlink (DL) assignments or for uplink (UL) grants.

According to one embodiment of the present disclosure, DCI for BWP switching is received at the first BWP.

According to one embodiment of the present disclosure, DCI for BWP switching is sent on a fourth BWP, where the first BWP and the fourth BWP correspond to the same slot.

According to one embodiment of the present disclosure, the first BWP is in the first carrier, the third BWP is in the second carrier, the first BWP and the third BWP correspond to the same slot do.

According to one embodiment of the present disclosure, there is no DCI for BWP switching received at the third BWP and/or one of the first and third BWP is used for Scell and the other A cell that is used for Pcells or configured cells and/or for which one of the first and third BWP is used is the Supplemental UL (SUL).

According to one embodiment of the present disclosure, all slots of the BWP switching period are used for BWP switching.

According to one embodiment of the present disclosure, UCI transmitted in slots not used for BWP switching in a BWP switching period are not dropped by user equipment, and the number of slots used for BWP switching in a BWP switching period does not exceed the standard or set based on the BWP switching capability of the user equipment.

According to one embodiment of the present disclosure, a semi-static codebook size is determined for the earliest available slot of the second BWP or the third BWP considering the dropped UCI.

According to one embodiment of the present disclosure, UCI includes HARQ-ACK and/or channel state information (CSI).

In BS 1000, in the case of BWP switching, the feedback delay is reduced by using the earliest available slot of the new BWP, which is different from the original BWP, to transmit the dropped UCI originally transmitted in the original BWP. can be shortened and system performance can be improved.

FIG. 11 shows a detailed block diagram of user equipment 1100 in accordance with one embodiment of the present disclosure.

User equipment 1100 includes n encoding/modulation sections 1110-1 to 1110-n, each of which is an encoding unit 1101 (1101-1 to 1101-n) for transmission data #1 to transmission data #n. and modulation units 1102 (1102-1 to 1102-n). In coding/modulation sections 1110-1 to 1110-n, coding units 1101-1 to 1101-n perform coding processing on transmission data #1 to #n, respectively, and modulate units 1102-1 to 1102-n. Each n performs modulation processing on encoded transmission data to generate data symbols. The coding rate and modulation scheme used at this time can follow MCS (Modulation and Coding Scheme) information input from the adaptive control unit 1124 . The n encoding/modulating units 1110-1 to 1110-n can be regarded as PUSCH.

Resource allocation unit 1111 allocates data symbols to PRBs under control from adaptive control unit 1124 and performs output to multiplexing unit 1112 . The resource allocation unit 1111 may also output resource allocation information to the control information generation unit 1113 .

The control information generation unit 1113 generates control information including UCI based on the information input from the adaptive control unit 1124 and the resource allocation unit 1111, and determines how to process UCI bits to be transmitted. More specifically, the control information generation unit 1113 drops the UCI transmitted in the BWP switching period of the first BWP and the earliest available slot of the second BWP or the third BWP to the dropped It is determined as a slot for transmitting UCI. Control information generation unit 1113 then outputs the generated control information to encoding unit 1114 .

Encoding unit 1114 performs encoding processing on control information (eg, UCI), modulation unit 1115 performs modulation processing on encoded control information, and outputs the control information to multiplexing unit 1112 .

Multiplexing unit 1112 multiplexes control information (eg, UCI) on the data symbols input from resource allocation unit 1111, and outputs the resulting signal to IFFT (Inverse Fast Fourier Transform) unit 1116. . Multiplexing of control information is performed, for example, for each subframe. Note that either time domain multiplexing or frequency domain multiplexing may be used to multiplex the control information.

An IFFT unit 1116 performs IFFT processing on multiple subcarriers within a PRB onto which control information and data symbols are mapped to generate orthogonal frequency division multiplexing (OFDM) symbols, which are multicarrier signals. . A CP (Cyclic Prefix) appending unit 1117 appends the same signal as the end portion of the OFDM symbol as CP to the beginning of the OFDM symbol. Radio transmission unit 1118 performs transmission processing such as D/A conversion, amplification, and up-conversion on the OFDM symbol after adding the CP, and transmits it from antenna 1119 to the base station.

The above corresponds to the case where the dropped UCI is multiplexed onto the PUSCH in the earliest available slot of the 3rd BWP. UCI need not be multiplexed with data if the dropped UCI is sent on the PUCCH in the earliest available slot of the second or third BWP.

On the other hand, radio receiving unit 1120 receives n OFDM symbols transmitted from the base station via antenna 1119 and performs reception processing, such as down-conversion and A/D conversion, on these OFDM symbols. A CP removal unit 1121 removes the CP from the OFDM symbols after reception processing.

A FFT (Fast Fourier Transform) unit 1122 performs FFT processing on the OFDM symbols after CP removal to obtain a frequency-domain multiplexed signal.

In demodulation/decoding sections 1123-1 to 1123-n, demodulation units 1104-1 to 1104-n respectively perform demodulation processing on post-FFT signals, and decoding units 1103-1 to 1103-n respectively post-demodulation signal is decoded. Received data is acquired by this means. Reception control information (eg, DCI for BWP switching) in the received data is input to an adaptive control unit 1124, which performs adaptive control on the transmitted data based on the received control information, and a resource allocation unit. 1111 performs frequency scheduling to determine which PRB each data is assigned to. More specifically, UE 1100 may receive a DL assignment or UL grant from a base station (eg, as shown in FIG. 3 or FIG. 4). After being demodulated and decoded by demodulation and decoding units 1123-1 to 1123-n, the DL assignment and UL grant are provided to adaptive control unit 1124 and then to control information generation unit 1113, for example, to generate UCI. can be

Note that user equipment 1100 shown in FIG. 11 may function as UE 200 shown in FIG. Specifically, wireless transmission unit 1118 may correspond to transmitter 230 . A wireless receiving unit 1120 may correspond to the receiver 210 . Circuit 220 includes coding/modulation sections 1110-1 to 1110-n, resource allocation unit 1111, multiplexing unit 1112, control information generation unit 1113, coding unit 1114, modulation unit 1115, IFFT unit 1116, and CP addition unit 1117. , CP removal unit 1121 , FFT unit 1122 , demodulation/decoding units 1123 - 1 to 1123 -n, and adaptive control unit 1124 . Clearly, one or more of these units may also be separated from the receiver 210 according to particular requirements.

FIG. 12 shows a detailed block diagram of base station 1200 in accordance with one embodiment of the present disclosure.

In the base station 1200 shown in FIG. 12, a radio receiving unit 1211 receives OFDM symbols transmitted from user equipment via antenna 1210 and performs reception processing such as up-conversion and/or A/D conversion on the OFDM symbols. do. A CP removal unit 1212 removes the CP from the OFDM symbols after reception processing. FFT unit 1213 performs FFT processing on the CP-removed OFDM symbols to obtain a received signal in which control information (including UCI) and data symbols are multiplexed. A demultiplexing unit 1214 demultiplexes the FFT-posted received signal into control signals and data symbols. Demultiplexing unit 1214 then outputs control signals to demodulator/decoder 1215 and data symbols to demapping unit 1216 .

In demodulation/decoding section 1215, demodulation unit 1201 performs demodulation processing on the control signal, and decoding unit 1202 performs decoding processing on the demodulated signal. Here, the control information may include UCI. A demodulator/decoder 1215 may demodulate and decode the UCI bits. The UCI was originally transmitted during the BWP switching period of the first BWP and dropped by the user equipment, and the earliest available slot of the second or third BWP is used by the user equipment to transmit the dropped UCI. Determined as a slot.

Additionally, the control information may also include resource allocation information. Demodulator/decoder 1215 then outputs the resource allocation information in the control information to demapping unit 1216 .

Based on the resource allocation information input from demodulation/decoding section 1215, demapping unit 1216 extracts data symbols from PRBs based on the resource allocation information. Demapping unit 1216 then outputs the extracted data symbols to demodulation/decoding section 1217 .

In demodulation/decoding section 1217, demodulation unit 1203 performs demodulation processing on the data symbols input from demapping unit 1216, and decoding unit 1204 performs decoding processing on the demodulated signal. Received data is acquired by this means.

The above corresponds to the case where the dropped UCI is multiplexed onto the PUSCH in the earliest available slot of the 3rd BWP. UCI need not be multiplexed with data if the dropped UCI is sent on the PUCCH in the earliest available slot of the second or third BWP.

On the other hand, in encoding/modulation section 1218, encoding unit 1205 performs encoding processing on transmission data, and modulation unit 1206 performs modulation processing on encoded transmission data to generate data symbols. IFFT unit 1219 performs IFFT processing on a plurality of subcarriers in PRBs to which data symbols input from coding/modulation section 1218 are assigned, and generates OFDM symbols, which are multicarrier signals. CP appending unit 1220 appends the same signal as the tail end of the OFDM symbol to the beginning of the OFDM symbol as CP. Radio transmission unit 1221 performs transmission processing such as D/A conversion, amplification, and up-conversion on the OFDM symbols after adding CP, and transmits them from antenna 1210 to the user equipment.

Obviously, although not shown in FIG. 12, the BS 1200 also provides DCI (e.g. DL assignment or UL grant) to the user equipment.

Note that base station 1200 shown in FIG. 12 may function as BS 1000 shown in FIG. Specifically, wireless receiving unit 1211 may correspond to receiver 1020 . A wireless transmission unit 1221 may correspond to transmitter 1010 . Circuitry 1030 may include CP removal unit 1212, FFT unit 1213, demultiplexing unit 1214, demodulation and decoding units 1215, 1217, demapping unit 1216, encoding and modulation unit 1218, IFFT unit 1219, CP addition unit 1220. . Clearly, one or more of these units may also be separated from circuit 1030 according to particular requirements.

FIG. 13 schematically illustrates an example flowchart of communication between a BS 1310 and a UE 1320, according to an embodiment of the present disclosure. For example, BS 1310 may be BS 1000 shown in FIG. 10 or base station 1200 shown in FIG. 12, and UE 1320 may be UE 200 shown in FIG. 2 or user equipment 1100 shown in FIG.

In step ST101, UE1320 connects with BS1310 by a connection procedure. The connection may be established by implementing known or later developed methods, the details of which are omitted here.

In step ST102, BS1310 transmits DCI for BWP switching to UE1320. As described above, BS 1320 may include transmitter 1010 as BS 1000 shown in FIG. 10, and step ST102 may be performed by transmitter 1010. FIG. Correspondingly, UE 1320 may include receiver 210 as UE 200 shown in FIG. 2, and receiver 210 receives the DCI transmitted from BS 1310 in step ST102.

In step ST103, the UE 1320 determines the earliest available slot of the new BWP for transmitting the dropped UCI. More specifically, the UE 1320 drops the UCI sent during the BWP switching period of the first BWP and sends the dropped UCI the earliest available slot of the second BWP or the third BWP. slot. As described above, UE 1320 may include circuit 220 as UE 200 shown in FIG. 2, and step ST103 may be performed by circuit 220.

In step ST104, UE1320 transmits UCI to BS1310. As described above, UE 1320 may also include transmitter 230 as UE 200 shown in FIG. 2, and step ST104 may be performed by transmitter 230. Correspondingly, BS 1310 may include receiver 1020 as BS 1000 shown in FIG. 10, and receiver 1020 receives the UCI bits transmitted from UE 1320 in step ST104.

In step ST105, BS1310 decodes UCI. BS1310 may also include circuit 1030 as BS1000 shown in FIG. 10, and step ST105 may be performed by circuit 1030. FIG.

Note that although not shown in FIG. 13, data may be transmitted from UE 1320 to BS 1310 on PUSCH and then decoded at BS 1310 .

A further embodiment of the present disclosure provides a wireless communication method for user equipment as shown in FIG. FIG. 14 shows a flowchart of a wireless communication method 1400 for user equipment, according to one embodiment of the disclosure. For example, wireless communication method 1400 may be applied to UE 200/1100 shown in FIGS.

As shown in FIG. 14, a wireless communication method 1400 includes downlink control information (DCI) for sub-band (BWP) switching from a first BWP to a second BWP in slots received from a base station. It starts from step S1401. Then, in step S1402, the uplink control information (UCI) sent during the BWP switching period of the first BWP is dropped and the earliest available slot of the second BWP or the third BWP is determined. A BWP switching period is from the slot in which the DCI for BWP switching is received to the start of the second BWP in which the first BWP is switched according to the DCI. Finally, in step S1403, the dropped UCI is transmitted to the base station in the determined earliest available slot of the second BWP or the third BWP. After step S1403, the wireless communication method 1400 ends. For example, the base station can be BS 1000/1200 shown in FIGS.

In the wireless communication method 1400, in the case of BWP switching, by using the earliest available slot of a new BWP different from the original BWP to transmit the dropped UCI originally transmitted in the original BWP. , the feedback delay can be shortened and the performance of the system can be improved.

Note that other technical features in user equipment 200 described above may also be incorporated in wireless communication method 1400 and are not described here to avoid redundancy.

A further embodiment of the present disclosure provides a wireless communication method for a base station as shown in FIG. FIG. 15 shows a flowchart of a wireless communication method 1500 for a base station according to one embodiment of the disclosure. For example, wireless communication method 1500 may be applied to BS 1000/1200 shown in FIGS.

As shown in FIG. 15, a wireless communication method 1500 provides that downlink control information (DCI) for sub-band (BWP) switching from a first BWP to a second BWP is transmitted in slots to user equipment. It starts from step S1501. Then, in step S1502, uplink control information (UCI) is received from the user equipment in the earliest available slot of the second BWP or the third BWP. Finally, in step S1503, the UCI is decoded. After step S1503, the wireless communication method 1500 ends. The UCI transmitted during the BWP switching period of the first BWP is dropped by the user equipment and the earliest available slot of the second or third BWP is determined by the user equipment. A BWP switching period is from the slot in which the DCI for BWP switching is received by the user equipment to the start of the second BWP in which the first BWP is switched according to the DCI. For example, the user equipment can be UE 200/1100 shown in FIGS.

In the wireless communication method 1500, in the case of BWP switching, by using the earliest available slot of a new BWP different from the original BWP to transmit the dropped UCI originally transmitted in the original BWP. , the feedback delay can be shortened and the performance of the system can be improved.

Other technical features of the base station 1000 described above may also be incorporated into the wireless communication method 1500 and are not described here to avoid redundancy. Please note that

The present disclosure can be implemented in software, hardware, or software in cooperation with hardware. Moreover, each functional block used in the description of each embodiment above can be implemented as an integrated circuit by an LSI, and each process described in each embodiment can be controlled by the LSI. They may be individually formed as chips, or one chip may be formed to include some or all of the functional blocks. They may include data inputs and outputs coupled to them. The LSI here can be called an IC, a system LSI, a super LSI, or an ultra LSI depending on the degree of integration. However, the technique of implementing integrated circuits is not limited to LSIs and can be implemented using dedicated circuits or general-purpose processors. In addition, an FPGA (Field Programmable Gate Array) that can be programmed after the LSI is manufactured, or a reconfigurable processor that can reconfigure the connections and settings of circuit cells arranged inside the LSI is used. can be

This disclosure is susceptible to various changes or modifications by those skilled in the art, based on the description presented herein and known technology, without departing from the content and scope of this disclosure; and applications fall within the scope claimed to be protected. Furthermore, the constituent elements of the above-described embodiments can be arbitrarily combined without departing from the content of the present disclosure.

Embodiments of the present disclosure may provide at least the following subject matter.

(1). a receiver operable to receive downlink control information (DCI) from a base station in slots for BWP switching from a first sub-band (BWP) to a second BWP;
a circuit operable to drop uplink control information (UCI) transmitted during BWP switching periods of a first BWP and determine the earliest available slot of a second BWP or a third BWP; , the BWP switching period is from the slot in which the DCI for BWP switching is received to the start of the second BWP in which the first BWP is switched according to the DCI;
a transmitter operable to transmit the dropped UCI to the base station in the determined earliest available slot of the second BWP or the third BWP;
user equipment.

(2). The earliest available slot of the second BWP or the third BWP is defined in the standard or indicated by the Slot Format Indicator (SFI) and/or set by the Radio Resource Control (RRC) (1 ).

(3). The dropped UCI is transmitted on the physical uplink control channel (PUCCH) in the earliest available slot of the second or third BWP or the earliest of the second or third BWP The user equipment according to (1), which is multiplexed and transmitted on a physical uplink shared channel (PUSCH) in available slots.

(4). The resource location of PUCCH for transmitting the dropped UCI in the earliest available slot of the second BWP or the third BWP depends on RRC configuration, standard specification, physical downlink control channel (PDCCH) control channel determined according to one or more of implicit indication by element (CCE) index, explicit indication by hybrid automatic repeat request-acknowledgement (HARQ-ACK) resource indicator (ARI) in DCI, and UE identity; The user device according to (3).

(5). The user equipment according to (3), wherein the resource position of UCI multiplexed on PUSCH is defined in a standard.

(6). The user equipment according to (1), wherein the DCI is for downlink (DL) assignments or for uplink (UL) grants.

(7). The user equipment of (1), wherein the DCI for BWP switching is received at the first BWP.

(8). The user equipment of (1), wherein DCI for BWP switching is received at a fourth BWP, the first BWP and the fourth BWP corresponding to the same slot.

(9). The user equipment of (1), wherein the first BWP is in a first carrier, the third BWP is in a second carrier, the first BWP and the third BWP correspond to the same slot. .

(10). There is no DCI for BWP switching received at the third BWP and/or one of the first BWP and the third BWP is used for the Scell and the other is used for the Pcell or configured cell, and /or The user equipment according to (9), wherein the cell in which one of the first BWP and the third BWP is used is a Supplementary UL (SUL).

(11). The user equipment of (1), wherein all slots of the BWP switching period are used for BWP switching.

(12). UCI transmitted in slots not used for BWP switching in the BWP switching period shall not be dropped by the user equipment;
The number of slots used for BWP switching in a BWP switching period is specified in the standard or set based on the BWP switching capability of the user equipment;
The user device according to (1).

(13). The user equipment of (1), wherein the semi-static codebook size is determined for the earliest available slot of the second BWP or the third BWP considering the dropped UCI.

(14). The user equipment according to (1), wherein the UCI includes HARQ-ACK and/or Channel State Information (CSI).

(15). a transmitter operable to transmit downlink control information (DCI) for BWP switching from a first subband (BWP) to a second BWP to a user equipment in slots;
a receiver operable to receive uplink control information (UCI) from the user equipment in the earliest available slot of the second BWP or the third BWP;
a circuit operable to decode the UCI;
with
The UCI sent in the BWP switching period of the first BWP is dropped by the user equipment, the earliest available slot of the second or third BWP is determined by the user equipment, and the BWP switching period is used for BWP switching. is from the slot in which the DCI is received by the user equipment to the start of the second BWP in which the first BWP is switched according to the DCI;
base station.

(16). The earliest available slot of the second BWP or the third BWP is defined in the standard or indicated by the Slot Format Indicator (SFI) and/or set by the Radio Resource Control (RRC), (15 ).

(17). The dropped UCI is transmitted on the physical uplink control channel (PUCCH) in the earliest available slot of the second or third BWP or the earliest of the second or third BWP The base station according to (15), multiplexed onto a physical uplink shared channel (PUSCH) and transmitted in available slots.

(18). The resource location of PUCCH for transmitting the dropped UCI in the earliest available slot of the second BWP or the third BWP depends on RRC configuration, standard specification, physical downlink control channel (PDCCH) control channel determined according to one or more of implicit indication by element (CCE) index, explicit indication by hybrid automatic repeat request-acknowledgement (HARQ-ACK) resource indicator (ARI) in DCI, and UE identity; The base station according to (17).

(19). The base station according to (17), wherein the resource position of UCI multiplexed on PUSCH is defined by a standard.

(20). The base station according to (15), wherein the DCI is for downlink (DL) assignments or for uplink (UL) grants.

(21). The base station of (15), wherein DCI for BWP switching is received at the first BWP.

(22). The base station of (15), wherein the DCI for BWP switching is transmitted on a fourth BWP, the first BWP and the fourth BWP corresponding to the same slot.

(23). The base station of (15), wherein the first BWP is in a first carrier and the third BWP is in a second carrier, the first BWP and the third BWP corresponding to the same slot. .

(24). There is no DCI for BWP switching received at the third BWP and/or one of the first BWP and the third BWP is used for the Scell and the other is used for the Pcell or configured cell, and /or the cell in which one of the first BWP and the third BWP is used is a Supplementary UL (SUL).

(25). The base station of (15), wherein all slots of the BWP switching period are used for BWP switching.

(26). UCI transmitted in slots not used for BWP switching in the BWP switching period shall not be dropped by the user equipment;
The number of slots used for BWP switching in a BWP switching period is specified in the standard or set based on the BWP switching capability of the user equipment;
The base station according to (15).

(27). The base station of (15), wherein the semi-static codebook size is determined for the earliest available slot of the second BWP or the third BWP considering the dropped UCI.

(28). The base station of (15), wherein the UCI includes HARQ-ACK and/or Channel State Information (CSI).

(29). receiving in slots from a base station downlink control information (DCI) for BWP switching from a first sub-band (BWP) to a second BWP;
dropping uplink control information (UCI) transmitted during the BWP switching period of a first BWP and determining the earliest available slot of a second BWP or a third BWP, wherein the BWP the switching period is from the slot in which the DCI for BWP switching is received to the start of the second BWP in which the first BWP is switched according to the DCI; the steps of dropping and determining;
transmitting the dropped UCI to the base station in the determined earliest available slot of the second BWP or the third BWP;
A wireless communication method for user equipment comprising:

(30). The earliest available slot of the second BWP or the third BWP is defined in the standard or indicated by the Slot Format Indicator (SFI) and/or set by the Radio Resource Control (RRC), (29 ).

(31). The dropped UCI is transmitted on the physical uplink control channel (PUCCH) in the earliest available slot of the second or third BWP or the earliest of the second or third BWP 29. The wireless communication method according to (29), wherein the multiplexed transmission on a physical uplink shared channel (PUSCH) in available slots.

(32). The resource location of PUCCH for transmitting the dropped UCI in the earliest available slot of the second BWP or the third BWP depends on RRC configuration, standard specification, physical downlink control channel (PDCCH) control channel determined according to one or more of implicit indication by element (CCE) index, explicit indication by hybrid automatic repeat request-acknowledgement (HARQ-ACK) resource indicator (ARI) in DCI, and UE identity; The wireless communication method according to (31).

(33). The wireless communication method according to (31), wherein the resource position of UCI multiplexed on PUSCH is defined by a standard.

(34). 29. The wireless communication method of (29), wherein the DCI is for downlink (DL) assignments or for uplink (UL) grants.

(35). The wireless communication method of (29), wherein the DCI for BWP switching is received at the first BWP.

(36). The wireless communication method of (29), wherein the DCI for BWP switching is received at a fourth BWP, the first BWP and the fourth BWP correspond to the same slot.

(37). The wireless communication of (29), wherein the first BWP is in a first carrier, the third BWP is in a second carrier, the first BWP and the third BWP correspond to the same slot. Method.

(38). There is no DCI for BWP switching received at the third BWP and/or one of the first BWP and the third BWP is used for the Scell and the other is used for the Pcell or configured cell, and / Alternatively, the cell in which one of the first BWP and the third BWP is used is a Supplementary UL (SUL).

(39). The wireless communication method of (29), wherein all slots of the BWP switching period are used for BWP switching.

(40). UCI transmitted in slots not used for BWP switching in the BWP switching period shall not be dropped by the user equipment;
The number of slots used for BWP switching in a BWP switching period is specified in the standard or set based on the BWP switching capability of the user equipment;
The wireless communication method according to (29).

(41). The wireless communication method of (29), wherein the semi-static codebook size is determined for the earliest available slot of the second BWP or the third BWP considering the dropped UCI.

(42). The wireless communication method of (29), wherein the UCI includes HARQ-ACK and/or Channel State Information (CSI).

(43). transmitting downlink control information (DCI) for BWP switching from a first sub-band (BWP) to a second BWP to the user equipment in slots;
receiving uplink control information (UCI) from the user equipment in the earliest available slot of the second BWP or the third BWP;
decoding the UCI;
including
The UCI sent in the BWP switching period of the first BWP is dropped by the user equipment, the earliest available slot of the second or third BWP is determined by the user equipment, and the BWP switching period is used for BWP switching. is from the slot in which the DCI is received by the user equipment to the start of the second BWP in which the first BWP is switched according to the DCI;
A wireless communication method for a base station.

(44). The earliest available slot of the second BWP or the third BWP is defined in the standard or indicated by the Slot Format Indicator (SFI) and/or set by the Radio Resource Control (RRC) (43 ).

(45). The dropped UCI is transmitted on the physical uplink control channel (PUCCH) in the earliest available slot of the second or third BWP or the earliest of the second or third BWP 43. The wireless communication method according to (43), wherein the multiplexed transmission on a physical uplink shared channel (PUSCH) in available slots.

(46). The resource location of PUCCH for transmitting the dropped UCI in the earliest available slot of the second BWP or the third BWP depends on RRC configuration, standard specification, physical downlink control channel (PDCCH) control channel determined according to one or more of implicit indication by element (CCE) index, explicit indication by hybrid automatic repeat request-acknowledgement (HARQ-ACK) resource indicator (ARI) in DCI, and UE identity; The wireless communication method according to (45).

(47). The wireless communication method according to (45), wherein the resource position of UCI multiplexed on PUSCH is defined by a standard.

(48). 43. The wireless communication method of (43), wherein the DCI is for downlink (DL) assignments or for uplink (UL) grants.

(49). The wireless communication method of (43), wherein DCI for BWP switching is transmitted in the first BWP.

(50). The wireless communication method of (43), wherein the DCI for BWP switching is received at a fourth BWP, the first BWP and the fourth BWP correspond to the same slot.

(51). The wireless communication of (43), wherein the first BWP is in a first carrier and the third BWP is in a second carrier, the first BWP and the third BWP corresponding to the same slot. Method.

(52). There is no DCI for BWP switching received at the third BWP and/or one of the first BWP and the third BWP is used for the Scell and the other is used for the Pcell or configured cell, and / Alternatively, the cell in which one of the first BWP and the third BWP is used is a Supplementary UL (SUL).

(53). The wireless communication method of (43), wherein all slots of the BWP switching period are used for BWP switching.

(54). UCI transmitted in slots not used for BWP switching in the BWP switching period shall not be dropped by the user equipment;
The number of slots used for BWP switching in a BWP switching period is specified in the standard or set based on the BWP switching capability of the user equipment;
The wireless communication method according to (43).

(55). The wireless communication method of (43), wherein the semi-static codebook size is determined for the earliest available slot of the second BWP or the third BWP considering the dropped UCI.

(56). 43. The wireless communication method of (43), wherein the UCI includes HARQ-ACK and/or Channel State Information (CSI).

Claims (9)

a receiver operable to receive downlink control information (DCI) from a base station in slots for BWP switching from a first sub-band (BWP) to a second BWP;
A circuit operable to drop uplink control information (UCI) transmitted during BWP switching periods of said first BWP and to determine the earliest available slot of said second BWP or third BWP. a circuit, wherein the BWP switching period is from the slot in which the DCI for BWP switching is received to the start of the second BWP in which the first BWP is switched according to the DCI;
a transmitter operable to transmit the dropped UCI to the base station in the determined earliest available slot of the second BWP or the third BWP;
with
UCI transmitted in slots not used for BWP switching in the BWP switching period are not dropped;
the number of slots used for BWP switching in the BWP switching period is defined by a standard or set based on the BWP switching capability;
User equipment. The earliest available slot of the second BWP or the third BWP is defined in a standard or indicated by a slot format indicator (SFI) and/or configured by radio resource control (RRC). ,
2. User equipment according to claim 1. The dropped UCI is transmitted on a physical uplink control channel (PUCCH) in the earliest available slot of the second BWP or the third BWP, or multiplexed onto a physical uplink shared channel (PUSCH) and transmitted in the earliest available slot of a BWP of 3;
2. User equipment according to claim 1. The resource location of the PUCCH for transmitting the dropped UCI in the earliest available slot of the second BWP or the third BWP depends on RRC configuration, standard specification, physical downlink control channel ( PDCCH) implicit indication by control channel element (CCE) index, explicit indication by hybrid automatic repeat request-acknowledgement (HARQ-ACK) resource indicator (ARI) in DCI, and one or more of UE ID determined according to
4. User equipment according to claim 3. the DCI is for downlink (DL) assignments or for uplink (UL) grants;
2. User equipment according to claim 1. the DCI for BWP switching is received at the first BWP;
2. User equipment according to claim 1. the DCI for BWP switching is received at a fourth BWP, the first BWP and the fourth BWP correspond to the same slot;
2. User equipment according to claim 1. There is no DCI for BWP switching received at said third BWP and/or one of said first BWP and said third BWP is used for Scell and the other is used for Pcell or configured cell and/or the cell in which one of the first BWP and the third BWP is used is a supplemental UL (SUL);
2. User equipment according to claim 1. receiving in slots from a base station downlink control information (DCI) for BWP switching from a first sub-band (BWP) to a second BWP;
dropping uplink control information (UCI) transmitted during BWP switching periods of said first BWP and determining the earliest available slot of said second BWP or third BWP; , the BWP switching period is from the slot in which the DCI for BWP switching is received to the start of the second BWP in which the first BWP is switched according to the DCI; and,
transmitting the dropped UCI to the base station in the determined earliest available slot of the second BWP or the third BWP;
including
UCI transmitted in slots not used for BWP switching in the BWP switching period are not dropped;
the number of slots used for BWP switching in the BWP switching period is defined by a standard or set based on the BWP switching capability;
wireless communication method.

Images