Method used for wireless communications and apparatus

Abstract

Disclosed in the present application are a method used for wireless communications and an apparatus. The method comprises: a first node receiving a first information block set, the first information block set configuring for an SpCell an SBFD symbol and a random access opportunity in a first sub-band on the SBFD symbol; receiving an LBT failure indication; triggering a consistent LBT failure for an active uplink BWP of the SpCell; and, in response to the consistent LBT failure for the active uplink BWP of the SpCell being triggered, switching the active uplink BWP of the SpCell to a first uplink BWP, wherein a consistent LBT failure for the first uplink BWP is not triggered, the first uplink BWP depends on the random access opportunity configured in the first sub-band on the SBFD symbol, and the first uplink BWP and the active uplink BWP are both located in the same carrier corresponding to the SpCell. The present application can optimize uplink BWP switching and reduce the risk of radio link failures.

Description

A method and apparatus for wireless communication

[0001] This application claims priority to Chinese Patent Application No. 202411515044.8, filed on October 28, 2024, entitled "A Method and Apparatus for Wireless Communication", the entire contents of which are incorporated herein by reference. Technical Field

[0002] This application relates to methods and apparatus in wireless communication systems, and more particularly to methods and apparatus for LBT (Listen Before Talk) operations in wireless communication. Background Technology

[0003] The application scenarios of future wireless communication systems are becoming increasingly diversified, and different application scenarios place different performance requirements on the system. In order to meet the different performance requirements of various application scenarios, the 3GPP (3rd Generation Partner Project) RAN (Radio Access Network) #72 plenary meeting decided to conduct research on New Radio (NR) (or 5G). At the 3GPP RAN #75 plenary meeting, the WI (Work Item) for New Radio (NR) was adopted, and the standardization work for NR began.

[0004] In shared spectrum wireless communication, the transmitter needs to perform channel sensing or LBT (Listen Before Talk) before transmitting to prevent interference with other communication devices. Furthermore, channel sensing can be performed per channel or per set of RBs (Resource Blocks) to maintain good compatibility.

[0005] Full Duplex (FD) can significantly improve spectrum efficiency and has thus become a research hotspot. NR Rel-19 includes WI that supports Subband Non-overlapping Full Duplex (SBFD), which is also one of the technologies that 6G may support. Summary of the Invention

[0006] For LBT in SBFD scenarios, existing LBT operations may no longer be applicable. This application discloses a solution. Unless otherwise specified, the embodiments and features in the embodiments of this application can be arbitrarily combined. Furthermore, although this application is initially intended for the Uu air interface, it can also be used for the PC5 interface. Furthermore, although this application is initially intended for SBFD scenarios, it is also applicable to other non-SBFD scenarios facing similar problems, achieving similar technical effects. In addition, adopting a unified solution for different scenarios helps reduce hardware complexity or improve compatibility. Unless otherwise specified, the embodiments and features in any node of this application can be applied to any other node. In particular, the explanations of terms, nouns, functions, and variables in this application (unless otherwise specified) can refer to the definitions in the 3GPP specification protocols TS36, TS38, and TS37 series.

[0007] This application discloses a method used in a first node of wireless communication, characterized by comprising:

[0008] Receive a first information block set, the first information block set configuring SBFD symbols for SpCell (Special Cell) and random access opportunities in the first subband on the SBFD symbols;

[0009] Receive LBT failure indication;

[0010] Trigger a consistent LBT failure for the active uplink BWP (Bandwidth Part) of the SpCell;

[0011] In response to a consistent LBT failure triggered for the active uplink BWP of the SpCell, the active uplink BWP of the SpCell is switched to the first uplink BWP.

[0012] Specifically, the LBT failure for the first uplink BWP was not triggered; the first uplink BWP relies on the random access opportunity configured in the first subband on the SBFD symbol; and both the first uplink BWP and the active uplink BWP are located in the same carrier corresponding to the SpCell.

[0013] As an example, SpCell is PCell (Primary Cell).

[0014] As a sub-implementation of the above embodiments, the SpCell belongs to the MCG (Master Cell Group).

[0015] As an example, SpCell is PSCell (Primary SCG (Secondary Cell Group) Cell).

[0016] As a sub-implementation of the above embodiments, the SpCell belongs to the SCG (Secondary Cell Group).

[0017] As an example, the SpCell is configured with a carrier.

[0018] As an example, the SpCell is configured to share the spectrum.

[0019] As an example, the above method is backward compatible with existing consistent LBT failures that trigger active uplink BWPs. When selecting candidate BWPs for uplink LBT handover, it relies on the random access opportunities configured in the first subband on the SBFD symbol, which can optimize uplink BWP handover and reduce the risk of radio link failure.

[0020] As an example, the determination of the first uplink BWP in the above method depends on the random access opportunity in the first subband on the SBFD symbol, and the latency of random access can be reduced by increasing random access resources.

[0021] As one example, the first node is a terminal.

[0022] According to one aspect of this application, the above method is characterized by comprising:

[0023] Receive the first signaling;

[0024] The determination of the first uplink BWP also depends on the first signaling; the first signaling enables the determination of the first uplink BWP, which depends on the frequency domain location of the random access opportunity in the first subband configured on the SBFD symbol.

[0025] As an example, the above method can improve implementation flexibility and backward compatibility by using the first signaling.

[0026] According to one aspect of this application, the above method is characterized in that the random access opportunity in the first sub-band configured on the SBFD symbol overlaps with K1 uplink BWPs in the frequency domain, but does not overlap with K2 uplink BWPs, wherein the first uplink BWP is one of the K1 uplink BWPs.

[0027] Wherein, K1 and K2 are both positive integers.

[0028] As an example, the above method improves the success rate of active uplink BWP handover in the SpCell.

[0029] As an example, uplink BWPs that overlap in the frequency domain with the random access opportunities configured in the first subband on the SBFD symbol are preferentially selected.

[0030] As an example, the above method can effectively increase random access resources and reduce random access latency.

[0031] As an example, the above method can effectively reduce the risk of wireless link failure.

[0032] According to one aspect of this application, the above method is characterized in that the first sub-band on the SBFD symbol overlaps with at least one of the K2 uplink BWPs in the frequency domain.

[0033] As an example, the random access opportunity in the first subband configured on the SBFD symbol overlaps in the frequency domain, and the uplink BWP configured with the random access opportunity is preferentially selected.

[0034] According to one aspect of this application, the above method is characterized in that random access opportunities are configured in both the K1 uplink BWPs and the K2 uplink BWPs.

[0035] According to one aspect of this application, the above method is characterized in that at least one of the K1 uplink BWPs is not configured with a random access opportunity.

[0036] According to one aspect of this application, the above method is characterized in that the SBFD symbol includes at least one of a symbol configured as DL (Downlink) by tdd-UL-DL-ConfigurationCommon and a symbol configured as flexible by tdd-UL-DL-ConfigurationCommon.

[0037] According to one aspect of this application, the method is characterized in that the transmission direction in the first sub-band on the SBFD symbol is uplink;

[0038] The SpCell operates in TDD (Time Division Duplexing) mode.

[0039] According to one aspect of this application, the above method is characterized by comprising:

[0040] Generate an LBT failure MAC (Medium Access Control) CE (Control Element), the LBT failure MAC CE indicating the SpCell;

[0041] Specifically, a consistent LBT failure for the active uplink BWP of the SpCell was triggered and not canceled.

[0042] According to one aspect of this application, the above method is characterized by comprising:

[0043] In response to receiving the LBT failure indication, the value of the first counter is incremented by 1;

[0044] Wherein, the updated value of the first counter is not less than the first threshold.

[0045] According to one aspect of this application, the above method is characterized by comprising:

[0046] A first channel access procedure is performed for an intended uplink transmission (UL transmission) prior to the failure of the LBT reception, the intended uplink transmission being in the active uplink BWP of the SpCell;

[0047] Specifically, according to the first channel access procedure, access to the channel was not achieved before the intended uplink transmission.

[0048] This application discloses a terminal, characterized in that it includes:

[0049] The terminal includes: one or more processors and memory;

[0050] The memory is coupled to the one or more processors and is used to store computer program code, which includes computer instructions. The one or more processors invoke the computer instructions to cause the terminal to execute the method described above in the first node.

[0051] As one example, the terminal is a UE (User Equipment).

[0052] This application discloses a method used in a second node for wireless communication, characterized by comprising:

[0053] Send a first set of information blocks, the first set of information blocks configuring SBFD symbols for SpCell and random access opportunities in a first subband on the SBFD symbols;

[0054] Specifically, an LBT failure indication is received; a consistent LBT failure for the active uplink BWP of the SpCell is triggered; the triggering of the consistent LBT failure for the active uplink BWP of the SpCell is used to determine that the active uplink BWP of the SpCell is switched to the first uplink BWP; a consistent LBT failure for the first uplink BWP is not triggered; the first uplink BWP depends on the random access opportunity configured in the first subband on the SBFD symbol; the first uplink BWP and the active uplink BWP are both located in the same carrier corresponding to the SpCell.

[0055] According to one aspect of this application, the above method is characterized by comprising:

[0056] Send the first signaling;

[0057] The determination of the first uplink BWP also depends on the first signaling; the first signaling enables the determination of the first uplink BWP to depend on the frequency domain location of the random access opportunity in the first subband configured on the SBFD symbol.

[0058] According to one aspect of this application, the above method is characterized in that the random access opportunity in the first sub-band configured on the SBFD symbol overlaps with K1 uplink BWPs in the frequency domain, but does not overlap with K2 uplink BWPs, wherein the first uplink BWP is one of the K1 uplink BWPs.

[0059] Wherein, K1 and K2 are both positive integers.

[0060] According to one aspect of this application, the above method is characterized in that the first sub-band on the SBFD symbol overlaps with at least one of the K2 uplink BWPs in the frequency domain.

[0061] According to one aspect of this application, the above method is characterized in that random access opportunities are configured in both the K1 uplink BWPs and the K2 uplink BWPs.

[0062] According to one aspect of this application, the above method is characterized in that at least one of the K1 uplink BWPs is not configured with a random access opportunity.

[0063] According to one aspect of this application, the above method is characterized in that the SBFD symbol includes at least one of a symbol configured as DL by tdd-UL-DL-ConfigurationCommon and a symbol configured as flexible by tdd-UL-DL-ConfigurationCommon.

[0064] According to one aspect of this application, the method is characterized in that the transmission direction in the first sub-band on the SBFD symbol is uplink;

[0065] The SpCell operates in TDD mode.

[0066] According to one aspect of this application, the above method is characterized by comprising:

[0067] An LBT failure MAC CE is generated, which indicates the SpCell;

[0068] Specifically, a consistent LBT failure for the active uplink BWP of the SpCell was triggered and not canceled.

[0069] According to one aspect of this application, the above method is characterized by comprising:

[0070] Upon receiving the LBT failure indication, the value of the first counter is incremented by 1.

[0071] Wherein, the updated value of the first counter is not less than the first threshold.

[0072] According to one aspect of this application, the above method is characterized by comprising:

[0073] Before the LBT failure is received, the first channel access procedure is performed for a planned uplink transmission in the active uplink BWP of the SpCell;

[0074] Specifically, the channel was not accessed according to the first channel access procedure before the intended uplink transmission.

[0075] This application discloses a base station, characterized in that it includes:

[0076] The base station includes: one or more processors and a memory;

[0077] The memory is coupled to the one or more processors and is used to store computer program code, which includes computer instructions. The one or more processors invoke the computer instructions to cause the base station to perform the methods described above in the second node. Attached Figure Description

[0078] Other features, objects, and advantages of this application will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings:

[0079] Figure 1 illustrates a signal processing flowchart in a first node according to an embodiment of this application;

[0080] Figure 2 illustrates a schematic diagram of a network architecture according to an embodiment of this application;

[0081] Figure 3 illustrates a schematic diagram of the wireless protocol architecture of the user plane and control plane according to an embodiment of this application;

[0082] Figure 4 illustrates a schematic diagram of the hardware modules of a communication device according to an embodiment of this application;

[0083] Figure 5 illustrates another signal processing flowchart in a first node according to an embodiment of this application;

[0084] Figure 6 illustrates a wireless signal transmission flowchart between a first node and a second node according to an embodiment of this application;

[0085] Figure 7 illustrates a schematic diagram of the overlap between random access opportunities in the first sub-band on the SBFD symbol and the uplink BWP in the frequency domain, according to an embodiment of this application;

[0086] Figure 8 illustrates a schematic diagram of the time-domain location of an SBFD symbol according to an embodiment of this application;

[0087] Figure 9 illustrates an SBFD symbol according to an embodiment of this application, a schematic diagram of the relationship between an uplink BWP and a first subband;

[0088] Figure 10 illustrates a signal processing flowchart for generating an LBT failure MAC CE according to an embodiment of this application;

[0089] Figure 11 illustrates a signal processing flowchart for triggering a consistent LBT failure for an active uplink BWP of the SpCell according to an embodiment of this application;

[0090] Figure 12 illustrates a structural block diagram of a processing apparatus in a first node according to an embodiment of this application;

[0091] Figure 13 illustrates a structural block diagram of a processing apparatus in a second node according to an embodiment of the present application. Detailed Implementation

[0092] The technical solution of this application will be further described in detail below with reference to the accompanying drawings. It should be noted that, unless otherwise specified, the embodiments and features in the embodiments of this application can be arbitrarily combined with each other.

[0093] Example 1

[0094] Example 1 illustrates a signal processing flowchart in a first node according to an embodiment of this application, as shown in Figure 1.

[0095] In Embodiment 1, the first node 100 receives a first information block set in step 101, the first information block set being a configuration SBFD symbol for the SpCell and random access opportunities in a first subband on the SBFD symbol; receives an LBT failure indication in step 102; triggers a consistent LBT failure for the active uplink BWP of the SpCell in step 103; and switches the active uplink BWP of the SpCell to a first uplink BWP in step 104 as a response to the triggering of the consistent LBT failure for the active uplink BWP of the SpCell; wherein, a consistent LBT failure for the first uplink BWP is not triggered; the first uplink BWP depends on the random access opportunities configured in the first subband on the SBFD symbol; and both the first uplink BWP and the active uplink BWP are located in the same carrier corresponding to the SpCell.

[0096] As an example, the first information block set is received from the second node in this application.

[0097] As an example, the second node in this application is the serving base station of the SpCell.

[0098] As an example, the second node in this application is the Transmission and Reception Point (TRP) of the SpCell.

[0099] As one embodiment, the first set of information blocks is included in higher layer signaling.

[0100] As an example, the higher-layer signaling is RRC (Radio Resource Control) signaling.

[0101] As an example, the higher-layer signaling is an RRC message.

[0102] As an example, the first information block set includes at least one RRC IE (Information Element).

[0103] As an example, the first information block set includes at least one field included in at least one RRC IE.

[0104] As an example, the first set of information blocks is RRCReconfiguration.

[0105] As one embodiment, the first information block set includes some or all of the fields in the RRCReconfiguration.

[0106] As an example, the first information block set is RRC Resume (RRC Recovery).

[0107] As one embodiment, the first information block set includes some or all of the fields in the RRCresume.

[0108] As one embodiment, the first information block set includes some or all of the domains in CellGroupConfig.

[0109] As one embodiment, the first information block set includes some or all of the domains in ServingCellConfig.

[0110] As one embodiment, the first information block set includes some or all of the domains in ServingCellConfigCommon.

[0111] As one embodiment, the first information block set includes some or all of the domains in ServingCellConfigCommonSIB (Serving Cell Common Configuration in SIB1).

[0112] As one embodiment, the first information block set includes some or all of the fields in BWP-DownlinkDedicated.

[0113] As one embodiment, the first information block set includes some or all of the fields in BWP-DownlinkCommon.

[0114] As one embodiment, the first information block set includes some or all of the fields in BWP-UplinkDedicated.

[0115] As one embodiment, the first information block set includes some or all of the fields in BWP-UplinkCommon.

[0116] As an example, the name of one of the information blocks included in the first information block set includes SBFD.

[0117] As an example, the first information block set includes one information block called SBFDConfig (SBFD configuration).

[0118] As an example, the first information block set includes one information block called SBFDConfigCommon (SBFD common configuration).

[0119] As an example, the first information block set includes one information block called SBFDConfigDedicated (SBFD specific configuration).

[0120] As an example, the first information block set includes one information block called SBFD-UplinkConfig.

[0121] As an example, the first set of information blocks is configured per subband.

[0122] As an example, the first information block set is configured per bandwidth portion (per BWP).

[0123] As an example, the SBFD symbol is a time domain symbol that supports full-duplex operation.

[0124] As an example, the SBFD symbol is the time-domain symbol to which SBFD applies.

[0125] As an example, the SBFD symbol is a time-domain symbol configured with SBFD.

[0126] As an example, the SBFD symbol is a time-domain symbol in the SBFD time slot.

[0127] As an example, the SBFD symbol is a time-domain symbol capable of simultaneous uplink and downlink transmission.

[0128] As an example, the SBFD symbol is a time-domain symbol that enables simultaneous uplink and downlink transmission on the network side (or base station side).

[0129] As an example, the SBFD symbol is a time-domain symbol that enables simultaneous uplink and downlink transmission on both the network side (or base station side) and the user equipment side.

[0130] As an example, the SBFD symbol is a time-domain symbol indicated (or provided) by the signaling that configures the SBFD.

[0131] As an example, the SBFD symbol includes at least one of a time-domain symbol configured as DL by tdd-UL-DL-ConfigurationCommon and a time-domain symbol configured as flexible by tdd-UL-DL-ConfigurationCommon.

[0132] As an example, the SBFD symbol is a time-domain symbol configured as DL by tdd-UL-DL-ConfigurationCommon.

[0133] As an example, considering only the DL symbol has the advantage of simplifying system design.

[0134] As one embodiment, the SBFD symbol includes both a time-domain symbol configured as DL by tdd-UL-DL-ConfigurationCommon and a time-domain symbol configured as flexible by tdd-UL-DL-ConfigurationCommon.

[0135] As an example, considering both DL and flexible symbols has the advantage of greater configuration flexibility.

[0136] As an example, the first information block set configures the SBFD symbol for the SpCell.

[0137] As an example, the first information block set indicates at least one SBFD symbol.

[0138] As one embodiment, the first set of information blocks indicates at least one SBFD slot.

[0139] As an example, the position or index of the at least one SBFD symbol in the time domain depends on the first information block set.

[0140] As an example, the first information block set indicates at least one DL symbol configured by tdd-UL-DL-ConfigurationCommon as an SBFD symbol.

[0141] As an example, the first information block set indicates at least one DL symbol and at least one flexible symbol configured by tdd-UL-DL-ConfigurationCommon as SBFD symbols.

[0142] As an example, the first information block set indicates that at least one DL symbol within a time window is the SBFD symbol.

[0143] As an example, the first information block set indicates that at least one DL symbol and at least one flexible symbol within a time window are the SBFD symbol.

[0144] As an example, the SBFD symbol is a symbol that overlaps in the time domain with the symbol indicated by the first information block set and is configured as DL or flexible by tdd-UL-DL-ConfigurationCommon.

[0145] As an example, the first information block set indicates the pattern of the SBFD symbol in the time domain.

[0146] As an example, the first information block set indicates the starting slot index, the starting symbol index within the starting slot, the ending slot index, and the starting ending index within the ending slot for at least one full-duplex symbol within a periodic time window.

[0147] As an example, the first information block set is configured on the SpCell with frequency domain resources for uplink and downlink transmission, respectively.

[0148] As an example, the first information block set is configured in a BWP on the SpCell, using frequency domain resources for uplink and downlink transmission respectively.

[0149] As one embodiment, the first information block set indicates a first subband, which is configured for uplink transmission.

[0150] As one embodiment, the first set of information blocks explicitly or implicitly indicates the frequency domain location and bandwidth of the first sub-band.

[0151] As one embodiment, the first information block set is configured with multiple uplink BWPs, and the first sub-band overlaps with at least one of the multiple uplink BWPs in the frequency domain.

[0152] As an example, the first sub-band is valid on the SBFD symbol.

[0153] As an example, the SBFD operation is performed in the first subband on the SBFD symbol.

[0154] As an example, the SBFD operation performs uplink transmission on a portion of a subband included on a carrier or cell within a symbol, and downlink transmission on a portion of a subband included on the carrier or cell.

[0155] As a sub-implementation of the above embodiment, the sub-band performing downlink transmission is a downlink sub-band belonging to DL (Downlink) BWP; the sub-band performing uplink transmission is an uplink sub-band belonging to UL BWP; the uplink sub-band and the downlink sub-band are orthogonal.

[0156] As an example, the SBFD operation is performed at the UE.

[0157] As a sub-example of the above embodiments, the UE simultaneously supports uplink transmission and downlink reception on a carrier or cell in a symbol.

[0158] As an example, the SBFD operation is performed at the base station.

[0159] As a sub-example of the above embodiments, the base station simultaneously supports downlink transmission and uplink reception on one carrier or cell in one symbol.

[0160] As an example, in a TDD (Time Division Duplex) system, when the SBFD operation is not performed at the base station, the base station transmits downlink signals on one carrier or cell in a DL (Downlink) symbol and receives uplink signals on the same carrier or cell in a UL (Uplink) symbol; when the SBFD operation is performed at the base station, the base station simultaneously receives uplink signals and transmits downlink signals on different subbands of the same carrier or cell in an SBFD symbol.

[0161] As an example, the first node is an SBFD-aware node.

[0162] As an example, the first node supports the SBFD operation.

[0163] As one embodiment, the first sub-band includes at least one RB (resource block).

[0164] As one embodiment, the first subband includes an RB.

[0165] As one embodiment, the first subband includes a plurality of consecutive RBs in the frequency domain.

[0166] As an example, an RB is defined as 12 consecutive subcarriers in the frequency domain.

[0167] As an example, the first information block set is the random access opportunity of the SpCell in the first subband on the SBFD symbol.

[0168] As an example, the first information block set configures at least one random access opportunity for the SpCell on the first subband of the SBFD symbol.

[0169] As an example, a random access opportunity is a PRACH (Physical Random Access Channel) opportunity.

[0170] As an example, a random access opportunity is a RACH (Random Access Channel) opportunity.

[0171] As one embodiment, the first information block set includes some or all of the domains in RACH-ConfigCommon (RACH common configuration).

[0172] As one embodiment, the first information block set includes some or all of the domains in RACH-ConfigGeneric (RACH General Configuration).

[0173] As an example, the random access opportunity in the first subband on the SBFD symbol is an additional random access opportunity (ROS).

[0174] As an example, the random access opportunity configured in the first subband on the SBFD symbol is valid only in the SBFD symbol.

[0175] As an example, the random access opportunity configured in the first subband on the SBFD symbol is used only to transmit the random access preamble in the SBFD symbol.

[0176] As an example, the random access opportunity configured in the first subband on the SBFD symbol is only available to SBFD-aware users.

[0177] As an example, the random access opportunity in the first subband configured on the SBFD symbol occupies at least one subcarrier in the frequency domain.

[0178] As an example, the random access opportunity configured in the first subband on the SBFD symbol occupies at least one RB in the frequency domain.

[0179] As an example, the random access opportunity in the first subband configured on the SBFD symbol occupies at least one SBFD symbol in the time domain.

[0180] As an example, the random access opportunity configured in the first subband on the SBFD symbol occupies at least one SBFD time slot in the time domain.

[0181] As an example, after switching the active uplink BWP of the SpCell to the first uplink BWP, a random access procedure is initiated on the first uplink BWP.

[0182] As an example, the first information block set indicates that the first node may initiate a random access procedure at the random access opportunity in the first subband on the SBFD symbol.

[0183] As one embodiment, the first information block set indicates that the first node may initiate a random access procedure at a random access opportunity configured in the first uplink BWP that overlaps with the first subband.

[0184] As one example, the random access opportunity is used to send a random access preamble.

[0185] As one example, the random access opportunity includes at least one time-domain resource.

[0186] As an example, a time-domain resource is one SBFD time slot.

[0187] As an example, a time-domain resource is an SBFD symbol.

[0188] As an example, the MAC entity of the first node receives the LBT failure indication.

[0189] As an example, the LBT failure indication is received from the lower layer of the first node.

[0190] As one embodiment, the lower layer is the physical layer.

[0191] As an example, the LBT failure indication is a channel access failure.

[0192] As an example, in response to receiving the LBT failure indication, the value of a first counter is incremented by 1; wherein the updated value of the first counter is greater than or equal to the first threshold.

[0193] As an example, the first counter is LBT_COUNTER (LBT counter).

[0194] As an example, the first counter is for the SpCell.

[0195] As an example, the first counter is used to accumulate the number of LBT failures on all uplink BWPs configured on the SpCell.

[0196] As an example, the first threshold is lbt-FailureInstanceMaxCount (maximum count of failed LBT instances).

[0197] As an example, the first threshold is configured by the network.

[0198] As an example, the SpCell is configured with lbt-FailureRecoveryConfig (LBT Failure Recovery Configuration).

[0199] As an example, the lbt-FailureRecoveryConfig configures the first threshold.

[0200] As one embodiment, the first threshold is configured by the first information block set.

[0201] As an example, the first threshold is predefined.

[0202] As an example, the first threshold is 1.

[0203] As an example, the first threshold is a positive integer greater than 1.

[0204] As an example, the first counter is initially set to 0.

[0205] As an example, the initial state is when the first sub-band is configured.

[0206] As an example, in response to receiving the LBT failure indication, a consistent LBT failure is triggered for the active uplink BWP of the SpCell; wherein the value of the first counter is greater than or equal to the first threshold.

[0207] As an example, multiple uplink BWPs are configured on the SpCell.

[0208] As an example, the active uplink BWP is one of the plurality of uplink BWPs configured on the SpCell.

[0209] As an example, all uplink BWPs configured on the SpCell except for the active uplink BWP are deactivated.

[0210] As an example, the active uplink BWP is the initial BWP.

[0211] As an example, the active uplink BWP is the default BWP.

[0212] As an example, the active uplink BWP is not a dormant BWP.

[0213] As an example, the active uplink BWP does not include the first subband.

[0214] As an example, in response to a consistent LBT failure triggered for the active uplink BWP of the SpCell, the active uplink BWP of the SpCell is switched to a first uplink BWP; wherein a consistent LBT failure for the first uplink BWP is not triggered.

[0215] As an example, the active uplink BWP switching of the SpCell is controlled by the MAC entity of the first node.

[0216] As an example, stop any random access procedure that is in progress on the SpCell.

[0217] As an example, the first uplink BWP and the active uplink BWP are both located in the same carrier corresponding to the SpCell.

[0218] As an example, the first uplink BWP and the active uplink BWP are configured by the same ServingCellConfig.

[0219] As an example, the same carrier is the carrier configured for the SpCell.

[0220] As one example, the same carrier is the shared spectrum configured for the SpCell.

[0221] As an example, the same carrier corresponding to the SpCell includes the plurality of uplink BWPs.

[0222] As an example, at least one of the multiple uplink BWPs included on the same carrier corresponding to the SpCell is not triggered with a consistent LBT failure.

[0223] As an example, the first uplink BWP is activated when the active uplink BWP of the SpCell is switched to the first uplink BWP.

[0224] As an example, the first uplink BWP and the active uplink BWP have at least some frequency resources that do not overlap.

[0225] As one embodiment, the first uplink BWP and the active uplink BWP each include a plurality of consecutive RBs.

[0226] As an example, the first subband and the active uplink BWP are both located on the same carrier corresponding to the SpCell.

[0227] As an example, a consistent LBT failure for the first uplink BWP was not triggered.

[0228] As an example, the first uplink BWP relies on the random access opportunity configured in the first subband on the SBFD symbol.

[0229] As an example, the determination of the first uplink BWP depends on the time-domain location of the random access opportunity in the first subband configured on the SBFD symbol.

[0230] As an example, the determination of the first uplink BWP depends on the frequency domain location of the random access opportunity in the first subband configured on the SBFD symbol.

[0231] As an example, the determination of the first uplink BWP depends on the frequency domain location of the random access opportunity in the first subband configured on the SBFD symbol, which is implemented based on the UE.

[0232] As an example, the active uplink BWP of the SpCell is switched to the first uplink BWP; wherein the random access opportunity in the first subband configured on the SBFD symbol overlaps with the first uplink BWP in the frequency domain.

[0233] As an example, the active uplink BWP of the SpCell is switched to the first uplink BWP; wherein the random access opportunity in the first subband configured on the SBFD symbol does not overlap with the first uplink BWP in the frequency domain.

[0234] As an example, the first uplink BWP is configured with legacy random access opportunities (ROs).

[0235] As an example, the determination of the first uplink BWP depends on the absence of a consistent LBT failure in the first uplink BWP.

[0236] As an example, after the active uplink BWP of the SpCell is switched, the first uplink BWP becomes the active uplink BWP of the SpCell.

[0237] As an example, a BWP is indicated by a BWP identifier (BWP-ID).

[0238] As an example, the downlink BWP of the SpCell and the first uplink BWP form a BWP pair; wherein the SpCell operates in TDD mode.

[0239] As an example, the downlink BWP of the SpCell has the same BWP identifier as the first uplink BWP; wherein the SpCell operates in TDD mode.

[0240] As an example, the active uplink BWP of the SpCell has a different BWP identifier from the first uplink BWP; wherein the SpCell operates in FDD (Frequency Division Duplex) mode.

[0241] As an example, in a TDD scenario, a BWP pair includes a downlink BWP and an uplink BWP, wherein the downlink BWP and the uplink BWP have the same BWP identifier; the uplink BWP and the downlink BWP switch simultaneously.

[0242] As an example, when the active uplink BWP of the SpCell switches to the first uplink BWP, the downlink BWP with the same BWP identifier as the active uplink BWP of the SpCell switches to the first downlink BWP, and the first downlink BWP has the same BWP identifier as the first uplink BWP.

[0243] As an example, in an FDD scenario, a downlink BWP and an uplink BWP are independent of each other, including: the BWP identifier of the downlink BWP and the BWP identifier of the uplink BWP are configured separately; the switching of the uplink BWP and the switching of the downlink BWP are unrelated.

[0244] As an example, when the active uplink BWP of the SpCell switches to the first uplink BWP, the active downlink BWP of the SpCell does not switch.

[0245] Example 2

[0246] Example 2 illustrates a network architecture diagram according to one embodiment of this application, as shown in Figure 2. Figure 2 illustrates a network architecture 200 of an NR 5G, LTE (Long-Term Evolution), and LTE-A (Long-Term Evolution Advanced) system. The NR 5G, LTE, or LTE-A network architecture 200 may be referred to as 5GS (5G System) / EPS (Evolved Packet System) 200 or some other suitable term. The 5GS / EPS 200 may include one or more UEs (User Equipment) 201, NG-RAN (Next Generation Radio Access Network) 202, 5GC (5G Core Network) / EPC (Evolved Packet Core) 210, HSS (Home Subscriber Server) / UDM (Unified Data Management) 220, and Internet services 230. The 5GS / EPS can interconnect with other access networks, but these entities / interfaces are not shown for simplicity. As shown, the 5GS / EPS provides packet-switched services; however, those skilled in the art will readily understand that the various concepts presented throughout this application can be extended to networks providing circuit-switched services or other cellular networks. The NG-RAN includes NR Node Bs (gNBs) 203 and other gNBs 204. gNBs 203 provide user and control plane protocol termination toward the UE 201. gNBs 203 may connect to other gNBs 204 via Xn interfaces (e.g., backhaul links). The XnAP protocol of the Xn interface is used to transmit control plane messages for the wireless network, while the user plane protocol of the Xn interface is used to transmit user plane data. The gNB203 can also be referred to as a base station, base transceiver station, radio base station, radio transceiver, transceiver function, Basic Service Set (BSS), Extended Service Set (ESS), TRP (Transmission Reception Point), or some other suitable term. In NTN (Non-Terrestrial Network) networks, the gNB203 can be a satellite, an aircraft, or a ground base station relayed via satellite. The gNB203 provides the UE201 with an access point to the 5GC / EPC210.Examples of UE201 include cellular phones, smartphones, Session Initiation Protocol (SIP) phones, laptops, personal digital assistants (PDAs), satellite radios, global positioning systems, multimedia devices, video devices, digital audio players (e.g., MP3 players), cameras, game consoles, drones, aircraft, narrowband IoT devices, machine-type communication devices, land vehicles, automobiles, in-vehicle equipment, in-vehicle communication units, wearable devices, or any other similar functional devices. Those skilled in the art may also refer to UE201 as a mobile station, subscriber station, mobile unit, subscriber unit, wireless unit, remote unit, mobile device, wireless device, wireless communication device, remote device, mobile subscriber station, access terminal, mobile terminal, wireless terminal, remote terminal, handheld device, user agent, mobile client, client, or any other suitable term. gNB203 connects to 5GC / EPC210 via the S1 / NG interface. 5GC / EPC210 includes MME (Mobility Management Entity) / AMF (Authentication Management Field) / SMF (Session Management Function) 211, other MME / AMF / SMF 214, S-GW (Service Gateway) / UPF (User Plane Function) 212, and P-GW (Packet Data Network Gateway) / UPF 213. MME / AMF / SMF 211 is the control node handling signaling between UE201 and 5GC / EPC210. ​​Generally, MME / AMF / SMF 211 provides bearer and connection management. All user IP (Internet Protocol) packets are transmitted through S-GW / UPF 212, which is itself connected to P-GW / UPF 213. The P-GW provides UE IP address allocation and other functions. The P-GW / UPF213 connects to Internet service 230. Internet service 230 includes carrier-compliant Internet protocol services, specifically including Internet, intranet, IMS (IP Multimedia Subsystem), and PS (Packet Switching) streaming services.

[0247] As an example, UE201 corresponds to the first node in this application.

[0248] As an example, gNB203 corresponds to the second node in this application.

[0249] As an example, the UE201 supports LAA (Licensed Assistant Access) or shared spectrum.

[0250] As an example, the gNB203 supports LAA (Licensed Assistant Access) or shared spectrum.

[0251] As an example, the UE201 supports flexible duplex mode transmission.

[0252] As an example, the gNB 203 supports flexible duplex mode transmission.

[0253] As an example, the UE201 supports SBFD.

[0254] As an example, the gNB(eNB)201 supports SBFD.

[0255] As an example, the gNB203 is a macrocell base station.

[0256] As an example, the gNB203 is a microcell base station.

[0257] As an example, the gNB203 is a pico cell base station.

[0258] As an example, the gNB203 is a femtocell.

[0259] As an example, the gNB203 is a base station device that supports large latency differences.

[0260] As one example, the gNB203 is a flight platform device.

[0261] As an example, the gNB203 is a satellite device.

[0262] As one embodiment, the gNB203 is a test device (e.g., a transceiver device simulating part of the functions of a base station, a signaling tester).

[0263] As an example, the radio link from the UE201 to the gNB203 is an uplink, which is used to perform uplink transmissions.

[0264] As an example, the radio link from the gNB203 to the UE201 is a downlink, which is used to perform downlink transmissions.

[0265] As an example, the UE201 and the gNB203 are connected via a Uu interface.

[0266] Example 3

[0267] Example 3 illustrates a schematic diagram of the wireless protocol architecture for the user plane and control plane according to an embodiment of this application, as shown in Figure 3. Figure 3 is a schematic diagram illustrating an embodiment of the wireless protocol architecture for the user plane 350 and control plane 300. Figure 3 shows the wireless protocol architecture of the control plane 300 of the UE and gNB using three layers: Layer 1, Layer 2, and Layer 3. Layer 1 (L1 layer) is the lowest layer and implements various PHY (Physical Layer) signal processing functions. The L1 layer will be referred to herein as PHY 301. Layer 2 (L2 layer) 305 is above PHY 301 and is responsible for the link between the UE and gNB through PHY 301. L2 layer 305 includes a MAC (Medium Access Control) sublayer 302, an RLC (Radio Link Control) sublayer 303, and a PDCP (Packet Data Convergence Protocol) sublayer 304, which terminate at the gNB on the network side. The PDCP sublayer 304 provides data encryption and integrity protection, and also supports inter-gNB mobility for UEs. The RLC sublayer 303 provides packet segmentation and reassembly, and implements retransmission of lost packets through ARQ (Automatic Repeat Request). The RLC sublayer 303 also provides duplicate packet detection and protocol error detection. The MAC sublayer 302 provides mapping between logical channels and transport channels, and multiplexing of logical channels. The MAC sublayer 302 is also responsible for allocating various radio resources (e.g., resource blocks) within a cell among UEs. The MAC sublayer 302 is also responsible for HARQ (Hybrid Automatic Repeat Request) operations. Although not illustrated, the UE's control plane 300 may also have a V2X layer above the RRC sublayer 306. The V2X layer is responsible for generating PC5 QoS parameter sets and QoS rules based on the received service data or service requests. It generates a PC5 QoS flow corresponding to the PC5 QoS parameter set and sends the PC5 QoS flow identifier and the corresponding PC5 QoS parameter set to the AS (Access Stratum) layer for the AS layer to perform QoS processing on data packets belonging to the PC5 QoS flow identifier. The V2X layer also includes a PC5-S Signaling Protocol sublayer, which is responsible for indicating to the AS layer whether each transmission is a PC5-S transmission or a V2X service data transmission.In the control plane 300, the RRC (Radio Resource Control) sublayer 306 in Layer 3 (L3) is responsible for acquiring radio resources (i.e., radio bearers) and configuring the lower layers using RRC signaling between the gNB and the UE. The user plane 350's radio protocol architecture includes Layer 1 (L1) and Layer 2 (L2). The radio protocol architecture in the user plane 350 is largely the same as the corresponding layers and sublayers in the control plane 300 for Physical Layer 351, PDCP sublayer 354 in L2 Layer 355, RLC sublayer 353 in L2 Layer 355, and MAC sublayer 352 in L2 Layer 355. However, PDCP sublayer 354 also provides header compression for upper-layer data packets to reduce radio transmission overhead. The L2 Layer 355 in the user plane 350 also includes the SDAP (Service Data Adaptation Protocol) sublayer 356, which is responsible for mapping between QoS flows and data radio bearers to support service diversity. The UE's radio protocol architecture in the user plane 350 may include some or all of the protocol sublayers of SDAP sublayer 356, PDCP sublayer 354, RLC sublayer 353, and MAC sublayer 352 at the L2 layer. Although not illustrated, the UE may also have several upper layers above the L2 layer 355, including a network layer (e.g., IP layer) terminating at the P-GW on the network side and an application layer terminating at the other end of the connection (e.g., remote UE, server, etc.).

[0268] As an example, the PDCP304 sends data to or receives data from the RLC303 via the RLC channel.

[0269] As an example, the PDCP354 sends data to or receives data from the RLC353 via the RLC channel.

[0270] As an example, the RLC303 sends data to or receives data from the MAC302 via a logical channel.

[0271] As an example, the RLC353 sends data to or receives data from the MAC352 via a logical channel.

[0272] As one embodiment, the MAC302 sends data to or receives data from the PHY301 through the transmission channel.

[0273] As one embodiment, the MAC352 sends data to or receives data from the PHY351 via the transmission channel.

[0274] As an example, the wireless protocol architecture in Figure 3 is applicable to the first node in this application.

[0275] As an example, the wireless protocol architecture in Figure 3 is applicable to the second node in this application.

[0276] As an example, the first information block set in this application is generated in the RRC306.

[0277] As an example, the first signaling in this application is generated in the RRC306.

[0278] As an example, the LBT failure MAC CE in this application is generated by MAC302 or MAC352.

[0279] As an example, the LBT failure indication in this application is generated in the PHY301 or the PHY351.

[0280] As an example, the consistent LBT failure mentioned in this application is generated by MAC302 or MAC352.

[0281] As an example, the L2 layer 305 or 355 belongs to a higher layer.

[0282] As an example, the RRC sublayer 306 in the L3 layer belongs to a higher layer.

[0283] Example 4

[0284] Example 4 illustrates a hardware module schematic diagram of a communication device according to an embodiment of this application, as shown in Figure 4. Figure 4 is a block diagram of a first communication device 450 and a second communication device 410 communicating with each other in an access network.

[0285] The first communication device 450 includes a controller / processor 459, a memory 460, a data source 467, a transmitting processor 468, a receiving processor 456, a multi-antenna transmitting processor 457, a multi-antenna receiving processor 458, a transmitter / receiver 454, and an antenna 452.

[0286] The second communication device 410 includes a controller / processor 475, a memory 476, a data source 477, a receiver processor 470, a transmitter processor 416, a multi-antenna receiver processor 472, a multi-antenna transmitter processor 471, a transmitter / receiver 418, and an antenna 420.

[0287] In the transmission from the second communication device 410 to the first communication device 450, at the second communication device 410, upper-layer data packets from the core network or from the data source 477 are provided to the controller / processor 475. The core network and data source 477 represent all protocol layers above the L2 layer. The controller / processor 475 implements the functionality of the L2 layer. In the transmission from the second communication device 410 to the first communication device 450, the controller / processor 475 provides header compression, encryption, packet segmentation and reordering, multiplexing between logical and transport channels, and radio resource allocation for the first communication device 450 based on various priority metrics. The controller / processor 475 is also responsible for retransmitting lost packets and signaling to the first communication device 450. The transmit processor 416 and the multi-antenna transmit processor 471 implement various signal processing functions for the L1 layer (i.e., the physical layer). Transmit processor 416 performs encoding and interleaving to facilitate FEC (Forward Error Correction) at the second communication device 410, and mapping of signal clusters based on various modulation schemes (e.g., BPSK (Binary Phase Shift Keying), QPSK (Quadrature Phase Shift Keying), M-PSK (M-Phase Shift Keying), M-QAM (M-Quadrature Amplitude Modulation)). Multi-antenna transmit processor 471 performs digital spatial precoding on the encoded and modulated symbols, including codebook-based precoding and non-codebook-based precoding, and beamforming processing, generating one or more spatial streams. Transmit processor 416 then maps each spatial stream to subcarriers, multiplexes it with a reference signal (e.g., a pilot) in the time and / or frequency domains, and subsequently uses IFFT (Inverse Fast Fourier Transform) to generate a physical channel carrying the time-domain multicarrier symbol stream. Multi-antenna transmit processor 471 then performs transmit analog precoding / beamforming operations on the time-domain multicarrier symbol stream. Each transmitter 418 converts the baseband multicarrier symbol stream provided by the multi-antenna transmitter processor 471 into an radio frequency stream, which is then provided to different antennas 420.

[0288] In the transmission from the second communication device 410 to the first communication device 450, at the first communication device 450, each receiver 454 receives a signal through its corresponding antenna 452. Each receiver 454 recovers the information modulated onto the radio frequency carrier and converts the radio frequency stream into a baseband multicarrier symbol stream, which is then provided to the receiver processor 456. The receiver processor 456 and the multi-antenna receiver processor 458 implement various signal processing functions of the L1 layer. The multi-antenna receiver processor 458 performs receive analog precoding / beamforming operations on the baseband multicarrier symbol stream from the receiver 454. The receiver processor 456 uses FFT (Fast Fourier Transform) to convert the baseband multicarrier symbol stream after the receive analog precoding / beamforming operations from the time domain to the frequency domain. In the frequency domain, the physical layer data signal and the reference signal are demultiplexed by the receiver processor 456, where the reference signal is used for channel estimation, and the data signal is recovered in the multi-antenna receiver processor 458 after multi-antenna detection to recover any spatial stream destined for the first communication device 450. Symbols on each spatial stream are demodulated and recovered in the receive processor 456, generating soft decisions. The receive processor 456 then decodes and deinterleaves the soft decisions to recover the upper-layer data and control signals transmitted by the second communication device 410 over the physical channel. The upper-layer data and control signals are then provided to the controller / processor 459. The controller / processor 459 implements the functions of Layer 2. The controller / processor 459 may be associated with a memory 460 storing program code and data. The memory 460 may be referred to as computer-readable media. In the transmission from the second communication device 410 to the first communication device 450, the controller / processor 459 provides multiplexing, packet reassembly, decryption, header decompression, and control signal processing between the transport and logical channels to recover higher-layer data packets from the second communication device 410. The upper-layer data packets are then provided to all protocol layers above Layer 2. Various control signals may also be provided to Layer 3 for Layer 3 processing.

[0289] In the transmission from the first communication device 450 to the second communication device 410, at the first communication device 450, upper-layer data packets are provided to the controller / processor 459 using a data source 467. The data source 467 represents all protocol layers above the L2 layer. Similar to the transmission functions at the second communication device 410 described in the transmission from the second communication device 410 to the first communication device 450, the controller / processor 459 implements header compression, encryption, packet segmentation and reordering, and multiplexing between the logical and transport channels, implementing L2 layer functions for the user plane and control plane. The controller / processor 459 is also responsible for retransmitting lost packets and signaling to the second communication device 410. Transmit processor 468 performs modulation mapping and channel coding processing, while multi-antenna transmit processor 457 performs digital multi-antenna spatial precoding, including codebook-based and non-codebook-based precoding, and beamforming processing. Subsequently, transmit processor 468 modulates the generated spatial stream into a multi-carrier / single-carrier symbol stream. After analog precoding / beamforming operations in multi-antenna transmit processor 457, the stream is provided to different antennas 452 via transmitter 454. Each transmitter 454 first converts the baseband symbol stream provided by multi-antenna transmit processor 457 into a radio frequency symbol stream before providing it to antenna 452.

[0290] In the transmission from the first communication device 450 to the second communication device 410, the function at the second communication device 410 is similar to the receiving function at the first communication device 450 described in the transmission from the second communication device 410 to the first communication device 450. Each receiver 418 receives radio frequency signals through its corresponding antenna 420, converts the received radio frequency signals into baseband signals, and provides the baseband signals to the multi-antenna receiving processor 472 and the receiving processor 470. The receiving processor 470 and the multi-antenna receiving processor 472 jointly implement the L1 layer function. The controller / processor 475 implements the L2 layer function. The controller / processor 475 may be associated with a memory 476 storing program code and data. The memory 476 may be referred to as computer-readable media. In the transmission from the first communication device 450 to the second communication device 410, the controller / processor 475 provides multiplexing between the transmission and logical channels, packet reassembly, decryption, header decompression, and control signal processing to recover the upper-layer data packets from the first communication device 450. Upper-layer data packets from the controller / processor 475 can be provided to the core network or all protocol layers above the L2 layer, and various control signals can also be provided to the core network or L3 for L3 processing.

[0291] As one embodiment, the first communication device 450 includes: at least one processor and at least one memory, the at least one memory including computer program code; the at least one memory and the computer program code are configured to be used with the at least one processor, and the first communication device 450 at least: receives a first information block set, the first information block set configuring SBFD symbols and random access opportunities in a first subband on the SBFD symbols for the SpCell; receives an LBT failure indication; triggers a consistent LBT failure for the active uplink BWP for the SpCell; and, in response to the consistent LBT failure for the active uplink BWP for the SpCell being triggered, switches the active uplink BWP of the SpCell to a first uplink BWP; wherein, a consistent LBT failure for the first uplink BWP is not triggered; the first uplink BWP depends on the random access opportunities configured in the first subband on the SBFD symbols; the first uplink BWP and the active uplink BWP are both located in the same carrier corresponding to the SpCell.

[0292] As one embodiment, the first communication device 450 includes: a memory storing a computer-readable instruction program that, when executed by at least one processor, produces actions including: receiving a first information block set, the first information block set configuring SBFD symbols and random access opportunities in a first subband on the SBFD symbols for a SpCell; receiving an LBT failure indication; triggering a consistent LBT failure for an active uplink BWP for the SpCell; and, in response to the triggering of the consistent LBT failure for the active uplink BWP for the SpCell, switching the active uplink BWP of the SpCell to a first uplink BWP; wherein a consistent LBT failure for the first uplink BWP is not triggered; the first uplink BWP depends on the random access opportunities configured in the first subband on the SBFD symbols; and both the first uplink BWP and the active uplink BWP are located in the same carrier corresponding to the SpCell.

[0293] As one embodiment, the second communication device 410 includes: at least one processor and at least one memory, the at least one memory including computer program code; the at least one memory and the computer program code are configured to be used with the at least one processor. The second communication device 410 at least: transmits a first information block set, the first information block set configuring SBFD symbols and random access opportunities in a first subband on the SBFD symbols for the SpCell; wherein, an LBT failure indication is received; a consistent LBT failure for the active uplink BWP of the SpCell is triggered; the triggering of the consistent LBT failure for the active uplink BWP of the SpCell is used to determine that the active uplink BWP of the SpCell is switched to a first uplink BWP; a consistent LBT failure for the first uplink BWP is not triggered; the first uplink BWP depends on the random access opportunities configured in the first subband on the SBFD symbols; the first uplink BWP and the active uplink BWP are both located in the same carrier corresponding to the SpCell.

[0294] As one embodiment, the second communication device 410 includes: a memory storing a computer-readable instruction program that, when executed by at least one processor, produces actions including: transmitting a first information block set, the first information block set configuring SBFD symbols and random access opportunities in a first subband on the SBFD symbols for the SpCell; wherein an LBT failure indication is received; a consistent LBT failure for the active uplink BWP of the SpCell is triggered; the triggering of the consistent LBT failure for the active uplink BWP of the SpCell is used to determine that the active uplink BWP of the SpCell is switched to a first uplink BWP; a consistent LBT failure for the first uplink BWP is not triggered; the first uplink BWP depends on the random access opportunities configured in the first subband on the SBFD symbols; the first uplink BWP and the active uplink BWP are both located in the same carrier corresponding to the SpCell.

[0295] As an example, the first communication device 450 corresponds to the first node in this application.

[0296] As an example, the first communication device 450 is a UE.

[0297] As an example, the first communication device 450 is a relay node.

[0298] As an example, the first communication device 450 is an RSU (Road Side Unit).

[0299] As an example, the first communication device 450 is a user equipment that supports flexible duplex mode transmission.

[0300] As an example, the second communication device 410 corresponds to the second node in this application.

[0301] As one embodiment, the second communication device 410 is a base station device.

[0302] As an example, the second communication device 410 is a base station device that supports flexible duplex mode transmission.

[0303] As one embodiment, the second communication device 410 is a base station distribution unit.

[0304] As one embodiment, the second communication device 410 is a piece of code in the distribution unit of a base station.

[0305] As one embodiment, at least one of the antenna 420, the transmitter 418, the multi-antenna transmitter processor 471, the transmitter processor 416, or the controller / processor 475 is used to transmit the first information block set in this application.

[0306] As one embodiment, at least one of the antenna 452, the receiver 454, the multi-antenna receiving processor 458, the receiving processor 456, or the controller / processor 459 is used to receive the first set of information blocks in this application.

[0307] As one embodiment, at least one of the antenna 420, the transmitter 418, the multi-antenna transmitter processor 471, the transmitter processor 416, or the controller / processor 475 is used to transmit the first signaling in this application.

[0308] As one embodiment, at least one of the antenna 452, the receiver 454, the multi-antenna receiving processor 458, the receiving processor 456, or the controller / processor 459 is used to receive the first signaling in this application.

[0309] Example 5

[0310] Example 5 illustrates another signal processing flowchart in a first node according to an embodiment of this application, as shown in Figure 5.

[0311] In Example 5, in step S501, the first node performs a first channel access procedure for a planned uplink transmission; in step S502, it is determined, based on the first channel access procedure, that the channel access was not completed before the planned uplink transmission; in step S503, a consistent LBT failure is triggered for the active uplink BWP of the SpCell; in step S504, the active uplink BWP of the SpCell is switched to the first uplink BWP; and in step S505, an LBT failure MAC CE is generated.

[0312] Steps S501 and S502 in Figure 5 are executed in the physical layer of the first node; steps S503, S504 and S505 in Figure 5 are executed in the MAC sublayer of the first node; the LBT failure indication is indicated from the physical layer of the first node to the MAC sublayer of the first node.

[0313] As an example, a first channel access procedure is performed for a planned uplink transmission before the LBT fails to be received, the planned uplink transmission being in the active uplink BWP of the SpCell.

[0314] As an example, a first channel access procedure is performed for a planned uplink transmission in the active uplink BWP of the SpCell; in response to a failure to access the channel prior to the planned uplink transmission according to the first channel access procedure, an LBT failure indication is sent to the MAC sublayer of the first node.

[0315] As an example, the planned uplink transmission is dynamically scheduled.

[0316] As an example, the intended uplink transmission is a configured uplink transmission.

[0317] As an example, the intended uplink transmission is a PUSCH (Physical Uplink Shared Channel) transmission.

[0318] As an example, the PUSCH transmission is a wireless signal transmitted via PUSCH.

[0319] As an example, the intended uplink transmission is a PUCCH (Physical Uplink Control Channel) transmission.

[0320] As an example, the PUCCH transmission is a wireless signal transmitted via PUCCH.

[0321] As an example, the intended uplink transmission is an SRS (Sounding Reference Signal) transmission.

[0322] As an example, the frequency domain resources occupied by the intended uplink transmission are located in the active uplink BWP of the SpCell.

[0323] As an example, the first channel access procedure is performed before the intended uplink transmission.

[0324] As an example, the first channel access procedure is performed at the physical layer of the first node.

[0325] As one embodiment, the first channel access process includes channel sensing.

[0326] As one embodiment, the channel sensing includes sensing at least once whether the channel is idle.

[0327] As one example, the channel awareness is used to determine whether to access the channel.

[0328] As an example, when the channel sensing determines that a channel is accessible, it immediately determines that the channel is accessible and accesses the channel; when the channel sensing determines that a channel is not accessible, it immediately determines that the channel is not accessible and accesses the channel is not possible.

[0329] As an example, when the channel sensing determines that a channel is idle, the system immediately determines that the channel is idle and accesses the channel; when the channel sensing determines that a channel is busy, the system immediately determines that the channel is busy and accesses the channel is not possible.

[0330] As an example, the first node determines that the channel is idle at least once by performing channel awareness on a channel, and then determines to access the channel after determining that the channel is idle at least once.

[0331] As an example, the channel sensing performed on a channel is used to determine that the channel is considered accessible when the channel is idle for Q times; where Q is a positive integer and is related to the type of channel access procedure of the channel sensing.

[0332] As one example, whether the sensing channel is idle is determined during a sensing slot duration.

[0333] As an example, the length of one sensing time slot is 9 microseconds.

[0334] As an example, the length of a single sensing time slot does not exceed 25 microseconds.

[0335] As an example, for a channel, if the energy detected by the first node on the channel is less than a first specific threshold for at least a portion of a sensing time slot, the first node senses that the channel is idle during the sensing time slot.

[0336] As an example, the at least part of the period is shorter than the period of the one sensing time slot.

[0337] As an example, the at least part of the period is 4 microseconds.

[0338] As an example, the process of sensing whether the channel is idle is performed during a defer duration.

[0339] As an example, the length of the delay period is 25 microseconds.

[0340] As one embodiment, the channel sensing includes performing at least one sensing of whether the channel is idle during a delay period.

[0341] As an example, for a channel, if the first node senses idle during each of at least one sensing time slot during a delay period on the channel, the first node senses that the delay period of the channel is idle.

[0342] As an example, the first specific threshold is configurable.

[0343] As an example, the unit of the first specific threshold is dBm (millidecibels).

[0344] As an example, the unit of the first specific threshold is mW (milliwatts).

[0345] As an example, the first channel access procedure is a Type 1 uplink channel access procedure.

[0346] As an example, the first channel access procedure is a Type 2 uplink channel access procedure.

[0347] As an example, the first channel access procedure is a Type 2A uplink channel access procedure.

[0348] As an example, the first channel access procedure is a Type 2B uplink channel access procedure.

[0349] As an example, the first channel access procedure is a Type 2C uplink channel access procedure.

[0350] As an example, the specific process of determining whether to access a channel through channel awareness can be found in TS37.213.

[0351] As an example, the first node is a user equipment that intends to perform uplink transmission on a configured resource on one of the active uplink BWPs of the SpCell.

[0352] As an example, when the channel is detected to be idle before a planned uplink transmission according to the first channel access procedure, the channel is accessed before a planned uplink transmission according to the first channel access procedure.

[0353] As one embodiment, the access channel includes performing the intended uplink transmission on the channel.

[0354] As an example, if the channel is not detected to be idle before the intended uplink transmission according to the first channel access procedure, the channel is not accessed before the intended uplink transmission according to the first channel access procedure.

[0355] As an example, when a busy channel is detected before a planned uplink transmission according to the first channel access procedure, the channel cannot be accessed before the planned uplink transmission according to the first channel access procedure.

[0356] As an example, if the channel cannot be accessed before the intended uplink transmission according to the first channel access procedure, the intended uplink transmission is not transmitted.

[0357] As an example, not sending the intended uplink transmission includes: abandoning the intention to send the intended uplink transmission.

[0358] As an example, not sending the intended uplink transmission includes: delaying the sending of the intended uplink transmission.

[0359] As an example, not sending the intended uplink transmission includes: not sending the intended uplink transmission on a channel sensed by the first channel access procedure.

[0360] As an example, if the first channel access procedure fails to access the channel before the intended uplink transmission, the physical layer of the first node sends the LBT failure indication to the MAC sublayer.

[0361] As an example, in response to receiving the LBT failure indication, the value of the first counter is incremented by 1; wherein the updated value of the first counter is not less than the first threshold.

[0362] As an example, if the channel access procedure fails to access the channel before the intended uplink transmission, a consistent LBT failure is triggered for the active uplink BWP of the SpCell; wherein the value of the first counter for the SpCell is not less than the first threshold.

[0363] As an example, in response to a consistent LBT failure triggered for the active uplink BWP of the SpCell, the active uplink BWP of the SpCell is switched to the first uplink BWP located in the same carrier corresponding to the SpCell.

[0364] As an example, the random access opportunity in the first subband configured on the SBFD symbol overlaps with each of the K uplink BWPs in the frequency domain, and the first uplink BWP is one of the K uplink BWPs; wherein, K is a positive integer.

[0365] As an example, the random access opportunity in the first subband configured on the SBFD symbol does not overlap with any of the K uplink BWPs in the frequency domain, and the first uplink BWP is one of the K uplink BWPs; wherein, K is a positive integer.

[0366] As a sub-implementation of the two embodiments described above, each of the K uplink BWPs is configured with a random access opportunity.

[0367] As a sub-implementation of the two embodiments described above, the K uplink BWPs are the uplink BWPs configured for the first node that have not yet experienced a consistent LBT failure.

[0368] As an example, the first uplink BWP is determined from K uplink BWPs.

[0369] As an example, the K uplink BWPs are candidate BWPs for the first node to perform active uplink BWP switching.

[0370] As an example, the K uplink BWPs do not include the active uplink BWP.

[0371] As an example, none of the K uplink BWPs have been activated yet.

[0372] As an example, K is a positive integer less than 4.

[0373] As an example, the K uplink BWPs are configured by the network.

[0374] As an example, the K uplink BWPs are configured on NUL (Normal Uplink) carriers.

[0375] As an example, the K uplink BWPs are configured on a SUL (Supplementary Uplink) carrier.

[0376] As an example, the first uplink BWP is the uplink BWP with the largest bandwidth among the K uplink BWPs.

[0377] As an example, the uplink BWP with the smallest BWP identifier is among the K uplink BWPs of the first uplink BWP.

[0378] As an example, the first uplink BWP is one of the K uplink BWPs that has the same subcarrier spacing (SCS) as the active uplink BWP.

[0379] As an example, the first uplink BWP is the uplink BWP with the largest RSRP (Reference Signal Received Power) among the K uplink BWPs.

[0380] As an example, the first uplink BWP is any one of the K uplink BWPs.

[0381] As an example, the K uplink BWPs are all located in the same carrier corresponding to the SpCell.

[0382] As an example, the random access opportunity in the first subband configured on the SBFD symbol may overlap with K1 uplink BWPs in the frequency domain, but may not overlap with K2 uplink BWPs, wherein the first uplink BWP is one of the K1 uplink BWPs.

[0383] As an example, no consistent LBT failure occurred in either the K1 uplink BWPs or the K2 uplink BWPs.

[0384] As an example, the K1 uplink BWPs and the K2 uplink BWPs are respectively configured to the first node.

[0385] As an example, neither the K1 uplink BWP nor the K2 uplink BWP has been activated.

[0386] As an example, neither the K1 uplink BWPs nor the K2 uplink BWPs include the active uplink BWP.

[0387] As an example, the first uplink BWP is determined from the K1 uplink BWPs.

[0388] As an example, K1 and K2 are positive integers.

[0389] As an example, both K1 and K2 are positive integers less than or equal to 4.

[0390] As an example, the sum of K1 and K2 is 4.

[0391] As an example, the sum of K1 and K2 is a positive integer less than 4.

[0392] As an example, the K1 uplink BWPs and the K2 uplink BWPs are configured by the network.

[0393] As an example, both the K1 uplink BWPs and the K2 uplink BWPs are configured on an NUL carrier.

[0394] As an example, both the K1 uplink BWPs and the K2 uplink BWPs are configured on the SUL carrier.

[0395] As an example, when the random access opportunity in the first subband configured on the SBFD symbol overlaps with K1 uplink BWPs in the frequency domain, but does not overlap with K2 uplink BWPs, the first uplink BWP is determined from the K1 uplink BWPs.

[0396] As an example, the K1 uplink BWPs are candidate BWPs for the first node to perform active uplink BWP switching.

[0397] As an example, the first uplink BWP is the uplink BWP with the largest bandwidth among the K1 uplink BWPs.

[0398] As an example, the uplink BWP with the smallest BWP identifier among the K1 uplink BWPs of the first uplink BWP.

[0399] As an example, the first uplink BWP is one of the K1 uplink BWPs that has the same subcarrier spacing as the active uplink BWP.

[0400] As an example, the first uplink BWP is the uplink BWP with the largest RSRP among the K1 uplink BWPs.

[0401] As an example, the first uplink BWP is any one of the K1 uplink BWPs.

[0402] As an example, the K1 uplink BWPs are all located in the same carrier corresponding to the SpCell.

[0403] As an example, the first sub-band configured on the SBFD symbol overlaps with at least one of the K2 uplink BWPs in the frequency domain.

[0404] As an example, at least one uplink BWP among the K2 uplink BWPs that overlaps in the frequency domain with the first subband on the SBFD symbol is not configured with a conventional random access opportunity.

[0405] As an example, when the random access opportunity configured in the first sub-band on the SBFD symbol overlaps with each of the K1 uplink BWPs in the frequency domain, and the K1 uplink BWPs are configured with conventional random access opportunities, the first uplink BWP is determined from the K1 uplink BWPs; wherein, the random access opportunity configured in the first sub-band on the SBFD symbol does not overlap with any of the K2 uplink BWPs in the frequency domain, or the first sub-band on the SBFD symbol overlaps with at least one of the K2 uplink BWPs in the frequency domain.

[0406] As an example, the random access opportunities configured in the first subband on the SBFD symbol overlap with the random access opportunities configured in the K1 uplink BWPs in the frequency domain.

[0407] As an example, the random access opportunities configured in the first subband on the SBFD symbol do not overlap with the random access opportunities configured in the K2 uplink BWPs in the frequency domain.

[0408] As an example, the random access opportunity configured in the first subband on the SBFD symbol overlaps in the frequency domain with the random access opportunity configured in at least one of the K1 uplink BWPs; wherein, the at least one uplink BWP among the K1 uplink BWPs is configured with a random access opportunity.

[0409] As an example, random access opportunities are configured in both the K1 uplink BWPs and the K2 uplink BWPs.

[0410] As an example, the random access opportunities configured in the K1 uplink BWPs and the K2 uplink BWPs are legacy random access opportunities (ROs).

[0411] As an example, the random access opportunity configured in the K1 uplink BWPs and the K2 uplink BWPs is effective for both SBFD-aware users and non-SBFD-aware users.

[0412] As an example, the random access opportunities configured in the K1 uplink BWPs and the K2 uplink BWPs are only valid in non-SBFD symbols.

[0413] As an example, the random access opportunities configured in the K1 uplink BWPs and the K2 uplink BWPs are only used to transmit random access preambles in non-SBFD symbols.

[0414] As a sub-implementation of the two embodiments described above, the non-SBFD symbol is a symbol configured as UL by tdd-UL-DL-ConfigurationCommon.

[0415] As a sub-implementation of the two embodiments described above, the non-SBFD symbol is a symbol configured to be flexible by tdd-UL-DL-ConfigurationCommon and indicated as UL.

[0416] As an example, the non-full-duplex symbol is a symbol other than the SBFD symbol.

[0417] As an example, the non-full-duplex symbol is a time-domain symbol that is not configured with SBFD.

[0418] As an example, the non-full-duplex symbol is a symbol that does not overlap with the SBFD time slot in the time domain.

[0419] As an example, the non-full-duplex symbol is a time-domain symbol that does not support SBFD.

[0420] As an example, the non-full-duplex symbol is a time-domain symbol that can only be used for uplink transmission, downlink transmission, or guard interval.

[0421] As an example, the non-full-duplex symbol is a time-domain symbol that is not indicated (or provided) by signaling configured with SBFD.

[0422] As an example, the non-full-duplex symbol is a time-domain symbol that is not indicated (or provided) by the first information block set.

[0423] As an example, at least one of the K1 uplink BWPs is not configured with a random access opportunity.

[0424] As an example, at least one of the K1 uplink BWPs is not configured with a traditional random access opportunity.

[0425] As an example, at least one of the K1 uplink BWPs is not configured with a random access opportunity that is only valid in non-SBFD symbols.

[0426] As an example, when the random access opportunity configured in the first subband on the SBFD symbol overlaps with the K1 uplink BWPs in the frequency domain, but does not overlap with the K2 uplink BWPs, the first uplink BWP is determined from the K1 uplink BWPs; wherein, at least one uplink BWP among the K1 uplink BWPs is not configured with a conventional random access opportunity.

[0427] As an example, the random access opportunity in the first subband configured on the SBFD symbol may overlap with K1 uplink BWPs in the frequency domain, but not with K2 uplink BWPs, wherein the first uplink BWP is one of the K2 uplink BWPs; wherein K1 and K2 are positive integers.

[0428] As an example, when the random access opportunity in the first subband configured on the SBFD symbol overlaps with K1 uplink BWPs in the frequency domain, but does not overlap with K2 uplink BWPs, the first uplink BWP is determined from the K2 uplink BWPs.

[0429] As an example, the K2 uplink BWPs are candidate BWPs for the first node to perform active uplink BWP switching.

[0430] As an example, the first uplink BWP is the uplink BWP with the largest bandwidth among the K2 uplink BWPs.

[0431] As an example, the uplink BWP with the smallest BWP identifier among the K2 uplink BWPs of the first uplink BWP.

[0432] As an example, the first uplink BWP is one of the K2 uplink BWPs that has the same subcarrier spacing as the active uplink BWP.

[0433] As an example, the first uplink BWP is the uplink BWP with the largest RSRP among the K2 uplink BWPs.

[0434] As an example, the first uplink BWP is any one of the K2 uplink BWPs.

[0435] As an example, the K2 uplink BWPs are all located in the same carrier corresponding to the SpCell.

[0436] As an example, the first signaling enables the first uplink BWP to be determined from the K1 uplink BWPs.

[0437] As a sub-implementation of the above embodiment, the random access opportunity in the first sub-band configured on the SBFD symbol overlaps with K1 uplink BWPs in the frequency domain, but does not overlap with K2 uplink BWPs.

[0438] As a sub-implementation of the above embodiment, the random access opportunity in the first sub-band configured on the SBFD symbol overlaps with K1 uplink BWPs in the frequency domain, but does not overlap with K2 uplink BWPs.

[0439] As an auxiliary embodiment of the above sub-example, random access opportunities are configured in both the K1 uplink BWPs and the K2 uplink BWPs.

[0440] As an auxiliary embodiment of the above sub-example, at least one of the K1 uplink BWPs is not configured with a random access opportunity.

[0441] As a sub-implementation of the above embodiment, the random access opportunity configured in the first sub-band on the SBFD symbol overlaps with K1 uplink BWPs in the frequency domain and overlaps with at least one of the K2 uplink BWPs; wherein, the K1 uplink BWPs are configured with random access opportunities, and the K2 uplink BWPs are not configured with random access opportunities.

[0442] As an example, the first signaling enables the first uplink BWP to be determined from the K2 uplink BWPs; wherein the random access opportunity configured in the first subband on the SBFD symbol overlaps with K1 uplink BWPs in the frequency domain, but does not overlap with K2 uplink BWPs, and K1 and K2 are positive integers.

[0443] Example 6

[0444] Example 6 illustrates a wireless signal transmission flowchart between a first node and a second node according to an embodiment of this application, as shown in Figure 6. In Figure 6, the first node N61 and the second node N62 communicate via a wireless interface. It should be noted that the order in this example does not limit the signal transmission order or the order of implementation in this application. In Figure 6, the steps included in the dashed box F601 are optional.

[0445] For the first node N61, in step S611, the first information block set is received; in step S612, the first signaling is received.

[0446] For the second node N62, in step S621, the first information block set is sent; in step S622, the first signaling is sent.

[0447] In embodiment 6, a first information block set is received, the first information block set configuring SBFD symbols and random access opportunities in a first subband on the SBFD symbols for the SpCell; an LBT failure indication is received; a consistent LBT failure is triggered for the active uplink BWP of the SpCell; as a response to the triggering of the consistent LBT failure for the active uplink BWP of the SpCell, the active uplink BWP of the SpCell is switched to a first uplink BWP; wherein, a consistent LBT failure for the first uplink BWP is not triggered; the first uplink BWP depends on the random access opportunities configured in the first subband on the SBFD symbols; the first uplink BWP and the active uplink BWP are both located in the same carrier corresponding to the SpCell; a first signaling is received; the determination of the first uplink BWP also depends on the first signaling; the first signaling enables the determination of the first uplink BWP to depend on the frequency domain position of the random access opportunities configured in the first subband on the SBFD symbols.

[0448] In one embodiment, the second node is a base station.

[0449] In one embodiment, the second node N62 is the sustaining base station of the serving cell of the first node N61.

[0450] As an example, the second node N62 is the sustaining base station of the master cell group (MCG) of the first node N61, namely MgNB (primary gNB).

[0451] As an example, the second node N62 is the sustaining base station of the secondary cell group (SCG) of the first node N61, namely SgNB (secondary gNB).

[0452] As an example, the second node N62 is the transceiver point of the serving cell of the first node N61.

[0453] As an example, the first node N61 is a terminal.

[0454] As an example, the first node N61 is a UE.

[0455] As an example, the first node N61 is an SBFD-aware node.

[0456] As an example, the first node N61 supports SBFD operation.

[0457] As a sub-implementation of the two embodiments described above, the SBFD operation is performed on the second node N62, or the SBFD operation is performed on the first node N61.

[0458] As an example, step S611 is performed before step S612.

[0459] As an example, step S611 is performed after step S622.

[0460] As an example, the first set of information blocks is received before the first signaling.

[0461] As an example, the first set of information blocks is received after the first signaling.

[0462] As one embodiment, the first information block set and the first signaling are two separate signaling systems.

[0463] As an example, the first information block set and the first signaling are carried in the same RRC signaling.

[0464] As an example, the determination of the first uplink BWP depends on both the random access opportunity in the first subband configured on the SBFD symbol and the first signaling.

[0465] As an example, if the first signaling is not received when a consistent LBT failure for the active uplink BWP for the SpCell is triggered, the determination of the first uplink BWP does not depend on the random access opportunity configured in the first subband on the SBFD symbol.

[0466] As an example, when a consistent LBT failure of the active uplink BWP for the SpCell is triggered, the first signaling is not received. The first uplink BWP is one of Q uplink BWPs configured for the first node that have not yet experienced a consistent LBT failure and are located on the same carrier as the active uplink BWP corresponding to the SpCell; wherein, Q is a positive integer not greater than 4.

[0467] As a sub-implementation of the above embodiment, the first uplink BWP is the uplink BWP with the largest bandwidth among the Q uplink BWPs.

[0468] As a sub-implementation of the above embodiment, the uplink BWP with the smallest BWP identifier is among the Q uplink BWPs of the first uplink BWP.

[0469] As a sub-implementation of the above embodiment, the first uplink BWP is an uplink BWP among the Q uplink BWPs that has the same subcarrier spacing as the active uplink BWP.

[0470] As a sub-example of the above embodiment, the first uplink BWP is the uplink BWP with the largest RSRP among the Q uplink BWPs.

[0471] As a sub-implementation of the above embodiment, the first uplink BWP is any one of the Q uplink BWPs.

[0472] As an example, one of the Q uplink BWPs overlaps in the frequency domain with the random access opportunity configured in the first subband on the SBFD symbol.

[0473] As an example, one of the Q uplink BWPs does not overlap with the random access opportunity in the first subband configured on the SBFD symbol in the frequency domain.

[0474] As an example, receiving the first signaling, the determination of the first uplink BWP also depends on the first signaling.

[0475] As an example, the first signaling is received from the second node in this application.

[0476] As an example, the first signaling is RRC signaling.

[0477] As one embodiment, the first signaling includes the first information block set.

[0478] As an example, the first signaling is MAC CE.

[0479] As an example, the first signaling is physical layer signaling.

[0480] As an example, the first signaling is DCI (Downlink Control Information).

[0481] As an example, the determination of the first signaling enabling the first uplink BWP depends on the random access opportunity in the first subband configured on the SBFD symbol.

[0482] As one embodiment, the determination of the first signaling enabling the first uplink BWP depends on the time-domain location of the random access opportunity in the first subband configured on the SBFD symbol.

[0483] As one embodiment, the determination of the first uplink BWP enabling the first signaling depends on the frequency domain location of the random access opportunity in the first subband configured on the SBFD symbol. As another embodiment, the first signaling has been received when a consistent LBT failure for the active uplink BWP for the SpCell is triggered, and the determination of the first uplink BWP depends on the time domain location of the random access opportunity in the first subband configured on the SBFD symbol.

[0484] As an example, the first signaling has been received when a consistent LBT failure of the active uplink BWP for the SpCell is triggered, and the determination of the first uplink BWP depends on the frequency domain location of the random access opportunity in the first subband configured on the SBFD symbol.

[0485] As an example, when a consistent LBT failure for the active uplink BWP for the SpCell is triggered, the first signaling has been received, and the active uplink BWP is switched to the first uplink BWP; wherein the first uplink BWP and the random access opportunity configured in the first subband on the SBFD symbol overlap in the frequency domain.

[0486] As an example, when a consistent LBT failure for the active uplink BWP for the SpCell is triggered, the first signaling has been received, and the active uplink BWP is switched to the first uplink BWP; wherein the first uplink BWP is one of at least one uplink BWP that overlaps in the frequency domain with the random access opportunity configured in the first subband on the SBFD symbol.

[0487] Example 7

[0488] Example 7 illustrates a schematic diagram of the overlap between random access opportunities in the first subband on the SBFD symbol in the first node of an embodiment of this application and the uplink BWP in the frequency domain. In Figure 7, diamond-filled rectangles represent random access opportunities in the first subband on the SBFD symbol, and vertical-line-filled rectangles represent conventional random access opportunities configured in the uplink BWP.

[0489] As an example, the first node is configured with at least three uplink BWPs in the carrier corresponding to the SpCell, in addition to the active uplink BWP, which correspond to uplink BWP#1, uplink BWP#2 and uplink BWP#3 in Figure 7, respectively.

[0490] As an example, the uplink BWP#1 and the uplink BWP#3 are configured with traditional random access opportunities.

[0491] As an example, the first uplink BWP is the uplink BWP#1.

[0492] As an example, the first uplink BWP is uplink BWP#2.

[0493] As an example, the first uplink BWP is uplink BWP#3.

[0494] As an example, the random access opportunity in the first subband configured on the SBFD symbol may overlap with the K1 uplink BWPs in the frequency domain, but may not overlap with the K2 uplink BWPs, wherein the first uplink BWP is one of the K1 uplink BWPs.

[0495] As a sub-implementation of the above embodiment, the K1 uplink BWPs include at least one of the uplink BWP#1 and the uplink BWP#2; the K2 uplink BWPs include the uplink BWP#3.

[0496] As an example, the random access opportunity in the first subband configured on the SBFD symbol overlaps with the K1 uplink BWPs in the frequency domain and overlaps with at least one of the K2 uplink BWPs, wherein the first uplink BWP is one of the K1 uplink BWPs.

[0497] As a sub-implementation of the above embodiment, the K1 uplink BWPs include the uplink BWP#1, and the K2 uplink BWPs include the uplink BWP#2.

[0498] As a sub-implementation of the above embodiment, the K1 uplink BWPs include uplink BWP#1, and the K2 uplink BWPs include uplink BWP#2 and uplink BWP#3.

[0499] As a sub-example of the above embodiment, the K1 uplink BWPs include uplink BWP#1 and uplink BWP#2; wherein, uplink BWP#1 is configured with a traditional random access opportunity, and BWP#2 is not configured with a traditional random access opportunity.

[0500] As an example, the uplink BWP that overlaps with the random access opportunity configured in the first subband on the SBFD symbol in the frequency domain is preferentially selected.

[0501] As a sub-implementation of the above embodiment, the random access opportunity in the first sub-band configured on the SBFD symbol overlaps with the K1 uplink BWPs in the frequency domain, but does not overlap with the K2 uplink BWPs, and the first uplink BWP is one of the K1 uplink BWPs.

[0502] As a supplementary embodiment of the above sub-example, at least one of the K1 uplink BWPs is not configured with a random access opportunity.

[0503] As an example, the first uplink BWP is one of the K1 uplink BWPs; wherein, the uplink BWP that overlaps with the random access opportunity configured in the first subband on the SBFD symbol in the frequency domain and is configured with a conventional random access opportunity is preferentially selected.

[0504] As a sub-implementation of the above embodiment, the random access opportunity in the first sub-band configured on the SBFD symbol overlaps with the K1 uplink BWPs, which are all configured with conventional random access opportunities, in the frequency domain, but does not overlap with the K2 uplink BWPs. The first uplink BWP is one of the K1 uplink BWPs.

[0505] Example 8

[0506] Example 8 illustrates a schematic diagram of the time-domain location of an SBFD symbol according to an embodiment of this application, as shown in Figure 8. In Figure 8, rectangles filled with diagonal lines represent SBFD symbols, and unfilled rectangles represent non-SBFD symbols.

[0507] As an example, a first RRC message is received, the first RRC message indicating the time-domain location of the SBFD symbol.

[0508] As an example, the first RRC message is carried in the SIB (System Information Block).

[0509] As an example, the first RRC message is a cell-specific message.

[0510] As an example, the first RRC message is a higher-level message.

[0511] As an example, the first RRC message is an RRC signaling message.

[0512] As an example, the first RRC message includes at least one IE in the RRC signaling.

[0513] As an example, the first RRC message includes at least one field in an IE of the RRC signaling.

[0514] As one example, the first RRC message includes some or all of the fields in RRCReconfigurationIE.

[0515] As an example, the first RRC message includes some or all of the domains in the RRC Resume IE.

[0516] As one example, the first RRC message includes some or all of the fields in the ServingCellConfig IE.

[0517] As an example, the first RRC message explicitly indicates the time-domain location of the SBFD symbol.

[0518] As an example, the first RRC message implicitly indicates the time-domain location of the SBFD symbol.

[0519] As one embodiment, the first information block set includes the first RRC message.

[0520] As an example, a symbol with a sub-band for the SBFD operation is defined as the SBFD symbol.

[0521] As an example, the SBFD operation is defined in the downlink symbol.

[0522] As a sub-implementation of the above embodiments, the downlink symbol is configured by TDD-UL-DL-ConfigCommon (Time Division Duplex Uplink and Downlink Common Configuration).

[0523] As a sub-example of the above embodiments, the downlink symbol is configured by TDD-UL-DL-ConfigDedicated (Time Division Duplex Uplink / Downlink Dedicated Configuration).

[0524] As a sub-implementation of the above embodiments, the downlink symbol is a symbol configured as Flexible by TDD-UL-DL-ConfigCommon or by TDD-UL-DL-ConfigDedicated and dynamically indicated as a downlink symbol.

[0525] As an example, the time-domain position of the SBFD symbol is indicated by an SBFD symbol pattern over a time period.

[0526] As an example, the time period includes a time slot.

[0527] As one example, the time period includes multiple time slots.

[0528] As one example, a time slot includes multiple symbols.

[0529] As an example, the time period is the same as dl-UL-TransmissionPeriodicity (downlink-uplink transmission period) in TDD-UL-DL-ConfigCommon.

[0530] As an example, the time period is an integer multiple of dl-UL-TransmissionPeriodicity in TDD-UL-DL-ConfigCommon.

[0531] As an example, the SBFD symbol pattern includes the starting position and the number of continuous symbols of the SBFD symbols in a time period.

[0532] Specifically, a time period includes 5 time slots, namely D1, D2, D3, D4 and U5, where D represents downlink time slot and U represents uplink time slot. Each time slot includes 14 symbols; the SBFD symbol pattern indicates that symbol 5 and the following 20 symbols are SBFD symbols.

[0533] As an example, the SBFD symbol pattern includes a DL time slot in a time period and the starting position and duration of the SBFD symbol in the DL time slot.

[0534] Specifically, a time period includes 5 time slots, namely D1, D2, D3, D4 and U5, where D represents downlink time slot and U represents uplink time slot. Each time slot includes 14 symbols. The SBFD patterner indicates that symbol 7 and the next 6 symbols in D1, i.e., symbols 7-13 are SBFD symbols, and symbol 0 and the next 6 symbols in D2, i.e., symbols 0-6 are SBFD symbols.

[0535] As an example, the time-domain position of the SBFD symbol is indicated by a bitmap, where each bit in the bitmap indicates whether the corresponding symbol included in a time period is an SBFD symbol or a non-SBFD symbol.

[0536] Specifically, a time period includes one time slot, the time slot includes 14 symbols, and a bitmap includes 14 bits. Each of the 14 bits indicates whether the corresponding 14 symbols are SBFD symbols or non-SBFD symbols; for example, when a bit is set to 1, it indicates an SBFD symbol, and when a bit is set to 0, it indicates a non-SBFD symbol; or when a bit is set to 1, it indicates a non-SBFD symbol, and when a bit is set to 0, it indicates an SBFD symbol.

[0537] Figure 8 of Embodiment 8 illustrates two complete time slots, each containing 14 symbols. The first time slot contains 14 symbols, all of which are SBFD symbols. The second time slot contains 14 symbols, the first 7 of which are SBFD symbols, and the last 7 of which are non-SBFD symbols.

[0538] Example 9

[0539] Example 9 illustrates an SBFD symbol according to an embodiment of this application, a schematic diagram of the relationship between an uplink BWP and a first subband, as shown in Figure 9. In Figure 9, the unfilled rectangle represents the SBFD symbol, and the right-diagonally filled rectangle represents the overlapping region of an uplink BWP and a first subband in the frequency domain.

[0540] In Embodiment 9, the transmission direction in the first subband on the SBFD symbol is uplink; wherein the SpCell operates in TDD mode.

[0541] As one embodiment, the transmission direction of the first subband is configured as uplink by the first information block set.

[0542] As an example, the first sub-band is a subset of the uplink BWP in the frequency domain.

[0543] As an example, an uplink BWP is a subset of the first subband in the frequency domain.

[0544] As an example, an uplink BWP and the first sub-band at least partially overlap in the frequency domain, as shown in Figure 9.

[0545] As an example, the overlapping region of an uplink BWP and a first subband in the frequency domain is the SBFD uplink subband.

[0546] As an example, the SBFD uplink subband is located within the uplink BWP.

[0547] As an example, the bandwidth of the uplink subband is less than or equal to the bandwidth of the uplink BWP.

[0548] As an example, the bandwidth of the uplink subband is less than or equal to the bandwidth of the first subband.

[0549] As an example, uplink transmission is performed in the uplink subband of the SBFD.

[0550] As an example, a random access procedure is performed in the uplink subband of the SBFD.

[0551] As a sub-implementation of the above embodiments, the SBFD uplink subband includes additional random access opportunities in the first subband on the SBFD symbol configured by the first information block set.

[0552] As a sub-example of the above embodiments, the SBFD uplink subband includes conventional random access opportunities configured in the uplink BWP.

[0553] Example 10

[0554] Example 10 illustrates a signal processing flowchart for generating an LBT failure MAC CE according to an embodiment of this application, as shown in Figure 10.

[0555] In Example 10, in step 1001, a consistent LBT failure for the active uplink BWP of the SpCell is triggered and not canceled in the first node 1000, and in step 1002, an LBT failure MAC CE is generated, which indicates the SpCell.

[0556] As an example, when a consistent LBT failure for the active uplink BWP of the SpCell is triggered and not canceled, the MAC entity instruction multiplexing and assembly process of the first node generates the LBT failure MAC CE.

[0557] As an example, the LBT failure MAC CE indicates the SpCell.

[0558] As an example, the bit for the SpCell included in the LBT failure MAC CE is set to 1.

[0559] As an example, the LBT failure MAC CE includes the index of the SpCell.

[0560] As an example, the LBT failure MAC CE includes the identifier of the SpCell.

[0561] As an example, the LBT failure MAC CE indicates an LBT failure triggered on the uplink BWP included in the SpCell.

[0562] As an example, the LBT failure MAC CE indicates that an LBT failure was not triggered for the first subband included in the SpCell.

[0563] As an example, the LBT failure MAC CE indication triggers an LBT failure for the first subband included in the SpCell.

[0564] As an example, the UL-SCH (Uplink Shared Channel) resource can be used for new transmissions on the first subband, and as a result of logical channel prioritization (LCP), the UL-SCH resource can accommodate the LBT failure MAC CE and its subheader.

[0565] As an example, the UL-SCH resource can be used for new transmissions on the SpCell, and as a result of logical channel prioritization, the UL-SCH resource can accommodate the LBT failure MAC CE and its subheading.

[0566] As an example, the UL-SCH resource can be used for new transmissions on a serving cell where the consistent LBT failure of the first node has not been triggered, and as a result of logical channel prioritization, the UL-SCH resource can accommodate the LBT failure MAC CE and its subheading.

[0567] As an example, after the LBT failure MAC CE is sent, the triggered consistent LBT failure for the active uplink BWP of the SpCell is cancelled.

[0568] As an example, if the first subband is reconfigured, the triggered consistent LBT failure for the active uplink BWP of the SpCell is canceled.

[0569] As an example, when the random access procedure on the SpCell is considered to have completed successfully, the triggered consistent LBT failure for the active uplink BWP of the SpCell is canceled.

[0570] As an example, when the lbt-FailureRecoveryConfig for the SpCell is reconfigured, the triggered consistent LBT failure for the active uplink BWP for the SpCell is canceled.

[0571] Example 11

[0572] Example 11 illustrates a signal processing flowchart for triggering a consistent LBT failure for an active uplink BWP of the SpCell according to an embodiment of this application, as shown in Figure 11. In Figure 11, the first node N1100 is the first node in this application.

[0573] In Example 11, for the first node N1100, in step S1101, it is determined whether a planned uplink transmission has failed to access the channel. If yes, step S1102 is executed; if no, step S1101 is executed. In step S1102, the value of the first counter is incremented by 1. In step S1103, it is determined whether the updated value of the first counter is not less than a first threshold. If yes, step S1104 is executed; if no, step S1101 is executed. In step S1104, a consistent LBT failure is triggered for the active uplink BWP of the SpCell.

[0574] As an example, the physical layer of the first node performs a first channel access procedure in the active uplink BWP of the SpCell for a planned uplink transmission, and when it fails to access the channel before the planned uplink transmission according to the first channel access procedure, it sends an LBT failure indication to the MAC sublayer of the first node.

[0575] As an example, in response to receiving the LBT failure indication, the value of the first counter is incremented by 1.

[0576] As an example, a consistent LBT failure for the active uplink BWP of the SpCell is triggered only if the updated value of the first counter is not less than a first threshold.

[0577] Example 12

[0578] Example 12 illustrates a structural block diagram of a processing apparatus in a first node according to an embodiment of the present application, as shown in Figure 12. In Figure 12, the first node processing apparatus 1200 includes a first receiver 1201 and a first transmitter 1202; the first node 1200 is a UE.

[0579] In embodiment 12, a first receiver 1201 receives a first information block set, the first information block set being a configuration SBFD symbol for the SpCell and random access opportunities in a first subband on the SBFD symbol; a first transmitter 1202 receives an LBT failure indication; triggers a consistent LBT failure for the active uplink BWP of the SpCell; in response to the triggering of the consistent LBT failure for the active uplink BWP of the SpCell, switches the active uplink BWP of the SpCell to a first uplink BWP; wherein, a consistent LBT failure for the first uplink BWP is not triggered; the first uplink BWP depends on the random access opportunities configured in the first subband on the SBFD symbol; the first uplink BWP and the active uplink BWP are both located in the same carrier corresponding to the SpCell.

[0580] As an example, a first receiver 1201 receives a first signaling; the determination of the first uplink BWP also depends on the first signaling; the first signaling enables the determination of the first uplink BWP, which depends on the frequency domain position of the random access opportunity in the first sub-band configured on the SBFD symbol.

[0581] As an example, the random access opportunity in the first subband configured on the SBFD symbol overlaps with K1 uplink BWPs in the frequency domain, but does not overlap with K2 uplink BWPs, wherein the first uplink BWP is one of the K1 uplink BWPs; wherein K1 and K2 are positive integers.

[0582] As an example, the random access opportunity in the first subband configured on the SBFD symbol overlaps with K1 uplink BWPs in the frequency domain, but does not overlap with K2 uplink BWPs, wherein the first uplink BWP is one of the K1 uplink BWPs; wherein K1 and K2 are positive integers; and the first subband on the SBFD symbol overlaps with at least one of the K2 uplink BWPs in the frequency domain.

[0583] As an example, the random access opportunity configured in the first subband on the SBFD symbol overlaps with K1 uplink BWPs in the frequency domain, but does not overlap with K2 uplink BWPs. The first uplink BWP is one of the K1 uplink BWPs. K1 and K2 are positive integers. Random access opportunities are configured in both the K1 and K2 uplink BWPs.

[0584] As an example, the random access opportunity configured in the first subband on the SBFD symbol overlaps with K1 uplink BWPs in the frequency domain, but does not overlap with K2 uplink BWPs. The first uplink BWP is one of the K1 uplink BWPs. K1 and K2 are positive integers. At least one of the K1 uplink BWPs is not configured with a random access opportunity.

[0585] As an example, the SBFD symbol includes at least one of a symbol configured as DL by tdd-UL-DL-ConfigurationCommon and a symbol configured as flexible by tdd-UL-DL-ConfigurationCommon.

[0586] As one embodiment, the transmission direction in the first subband on the SBFD symbol is uplink; wherein the SpCell operates in TDD mode.

[0587] As an example, the first transmitter 1202 generates an LBT failure MAC CE, which indicates the SpCell; wherein the triggered consistent LBT failure of the active uplink BWP for the SpCell is not canceled.

[0588] As an example, the first transmitter 1202, in response to receiving the LBT failure indication, increments the value of the first counter by 1; wherein the updated value of the first counter is not less than a first threshold.

[0589] As an example, the first transmitter 1202 performs a first channel access procedure for a planned uplink transmission before receiving the LBT failure, the planned uplink transmission being in the active uplink BWP of the SpCell; wherein, according to the first channel access procedure, access to the channel failed before the planned uplink transmission.

[0590] As one embodiment, the first receiver 1201 includes a receiver 454 (including an antenna 452) as shown in Figure 4 of this application, a receiver processor 456, a multi-antenna receiver processor 458, and a controller / processor 459.

[0591] As one embodiment, the first receiver 1201 includes at least one of the receiver 454 (including antenna 452) in Figure 4 of this application, a receiver processor 456, a multi-antenna receiver processor 458, or a controller / processor 459.

[0592] As one embodiment, the first transmitter 1202 includes the transmitter 454 (including antenna 452) shown in Figure 4 of this application, the transmission processor 468, the multi-antenna transmission processor 457, and the controller / processor 459.

[0593] As one embodiment, the first transmitter 1202 includes at least one of the receiver 454 (including antenna 452) in Figure 4 of this application, a transmitter processor 468, a multi-antenna transmitter processor 457, or a controller / processor 459.

[0594] Example 13

[0595] Example 13 illustrates a structural block diagram of a processing apparatus in a second node according to an embodiment of the present application, as shown in Figure 13. In Figure 13, the second node processing apparatus 1300 includes a second transmitter 1301; the second node 1300 is a base station or gNB-DU.

[0596] In embodiment 13, the second transmitter 1301 transmits a first information block set, which configures SBFD symbols for the SpCell and random access opportunities in a first subband on the SBFD symbols; wherein, an LBT failure indication is received; a consistent LBT failure for the active uplink BWP of the SpCell is triggered; the triggering of the consistent LBT failure for the active uplink BWP of the SpCell is used to determine that the active uplink BWP of the SpCell is switched to a first uplink BWP; a consistent LBT failure for the first uplink BWP is not triggered; the first uplink BWP depends on the random access opportunities configured in the first subband on the SBFD symbols; the first uplink BWP and the active uplink BWP are both located in the same carrier corresponding to the SpCell.

[0597] As an example, the second transmitter 1301 transmits a first signaling; the determination of the first uplink BWP also depends on the first signaling; the first signaling enables the determination of the first uplink BWP, which depends on the frequency domain location of the random access opportunity in the first sub-band configured on the SBFD symbol.

[0598] As an example, the random access opportunity in the first subband configured on the SBFD symbol overlaps with K1 uplink BWPs in the frequency domain, but does not overlap with K2 uplink BWPs, wherein the first uplink BWP is one of the K1 uplink BWPs; wherein K1 and K2 are positive integers.

[0599] As an example, the random access opportunity in the first subband configured on the SBFD symbol overlaps with K1 uplink BWPs in the frequency domain, but does not overlap with K2 uplink BWPs, wherein the first uplink BWP is one of the K1 uplink BWPs; wherein K1 and K2 are positive integers; and the first subband on the SBFD symbol overlaps with at least one of the K2 uplink BWPs in the frequency domain.

[0600] As an example, the random access opportunity configured in the first subband on the SBFD symbol overlaps with K1 uplink BWPs in the frequency domain, but does not overlap with K2 uplink BWPs. The first uplink BWP is one of the K1 uplink BWPs. K1 and K2 are positive integers. Random access opportunities are configured in both the K1 and K2 uplink BWPs.

[0601] As an example, the random access opportunity configured in the first subband on the SBFD symbol overlaps with K1 uplink BWPs in the frequency domain, but does not overlap with K2 uplink BWPs. The first uplink BWP is one of the K1 uplink BWPs. K1 and K2 are positive integers. At least one of the K1 uplink BWPs is not configured with a random access opportunity.

[0602] As an example, the SBFD symbol includes at least one of a symbol configured as DL by tdd-UL-DL-ConfigurationCommon and a symbol configured as flexible by tdd-UL-DL-ConfigurationCommon.

[0603] As one embodiment, the transmission direction in the first subband on the SBFD symbol is uplink; wherein the SpCell operates in TDD mode.

[0604] As an example, an LBT failure MAC CE is generated, which indicates the SpCell; wherein, the triggered consistent LBT failure of the active uplink BWP for the SpCell is not canceled.

[0605] As an example, when the LBT failure indication is received, the value of the first counter is incremented by 1; wherein the updated value of the first counter is not less than a first threshold.

[0606] As an example, a first channel access procedure is performed for a planned uplink transmission before the LBT failure is received, the planned uplink transmission being in the active uplink BWP of the SpCell; wherein, according to the first channel access procedure, channel access was failed before the planned uplink transmission.

[0607] As one embodiment, the second transmitter 1301 includes the transmitter 418 (including antenna 420) shown in Figure 4 of this application, the transmission processor 416, the multi-antenna transmission processor 471, and the controller / processor 475.

[0608] As one embodiment, the second transmitter 1301 includes at least one of the transmitter 418 (including antenna 420) in Figure 4 of this application, a transmission processor 416, a multi-antenna transmission processor 471, or a controller / processor 475.

[0609] Those skilled in the art will understand that all or part of the steps in the above methods can be implemented by a program instructing related hardware, and the program can be stored in a computer-readable storage medium, such as a read-only memory, hard disk, or optical disk. Optionally, all or part of the steps in the above embodiments can also be implemented using one or more integrated circuits. Correspondingly, each module unit in the above embodiments can be implemented in hardware or in the form of software functional modules. This application is not limited to any specific combination of software and hardware. The first type of communication node or UE or terminal in this application includes, but is not limited to, mobile phones, tablets, laptops, network cards, low-power devices, eMTC (enhanced Machine Type Communication) devices, NB-IoT devices, vehicle-mounted communication devices, aircraft, airplanes, drones, remote-controlled airplanes, and other wireless communication devices. The second type of communication node or base station or network-side equipment in this application includes, but is not limited to, macrocell base stations, microcell base stations, home base stations, relay base stations, eNBs, gNBs, transmission and reception points (TRPs), relay satellites, satellite base stations, airborne base stations, and other wireless communication devices.

[0610] The above description is merely a preferred embodiment of this application and is not intended to limit the scope of protection of this application. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of protection of this application.

Claims

A method used in a first node of wireless communication, characterized in that, include: Receive a first set of information blocks, the first set of information blocks configuring SBFD symbols for SpCell and random access opportunities in a first subband on the SBFD symbols; LBT failure to receive indication; A consistent LBT failure is triggered for the active uplink BWP of the SpCell; In response to a consistent LBT failure triggered for the active uplink BWP of the SpCell, the active uplink BWP of the SpCell is switched to the first uplink BWP. Specifically, the LBT failure for the first uplink BWP was not triggered; the first uplink BWP depends on the random access opportunity configured in the first subband on the SBFD symbol; and both the first uplink BWP and the active uplink BWP are located in the same carrier corresponding to the SpCell. The method in the first node according to claim 1 is characterized in that, include: Receive the first signaling; The determination of the first uplink BWP also depends on the first signaling; The determination of the first signaling enabling the first uplink BWP depends on the frequency domain location of the random access opportunity in the first subband configured on the SBFD symbol. The method in the first node according to any one of claims 1 or 2 is characterized in that, The random access opportunity in the first subband configured on the SBFD symbol overlaps with K1 uplink BWPs in the frequency domain, but does not overlap with K2 uplink BWPs. The first uplink BWP is one of the K1 uplink BWPs. Wherein, K1 and K2 are both positive integers. The method in the first node according to claim 3 is characterized in that, The first subband on the SBFD symbol overlaps with at least one of the K2 uplink BWPs in the frequency domain. The method in the first node according to claim 3 or 4 is characterized in that, Random access opportunities are configured in both the K1 uplink BWP and the K2 uplink BWP. The method in the first node according to any one of claims 3 to 5 is characterized in that, At least one of the K1 uplink BWPs is not configured with a random access opportunity. The method in the first node according to any one of claims 1 to 6 is characterized in that, The SBFD symbols include at least one of the symbols configured as DL by tdd-UL-DL-ConfigurationCommon and the symbols configured as flexible by tdd-UL-DL-ConfigurationCommon. The method in the first node according to any one of claims 1 to 7 is characterized in that, The transmission direction in the first sub-band of the SBFD symbol is uplink; The SpCell operates in TDD mode. The method in the first node according to any one of claims 1 to 8 is characterized in that, include: Generate an LBT failure MAC CE, the LBT failure MAC CE indicating the SpCell; The triggered consistent LBT failure of the active uplink BWP for the SpCell was not canceled. The method in the first node according to any one of claims 1 to 9 is characterized in that, include: In response to receiving the LBT failure indication, the value of the first counter is incremented by 1; Wherein, the updated value of the first counter is not less than the first threshold. The method in the first node according to any one of claims 1 to 10 is characterized in that, include: A first channel access procedure is performed for an intended uplink transmission (UL transmission) prior to the failure of the LBT received, the intended uplink transmission being in the active uplink BWP of the SpCell; Specifically, according to the first channel access procedure, access to the channel was not achieved before the intended uplink transmission. A terminal, characterized in that, The terminal includes: one or more processors and memory; The memory is coupled to the one or more processors, the memory being used to store computer program code, the computer program code including computer instructions, the one or more processors invoking the computer instructions to cause the terminal to perform the method as described in any one of claims 1-11. A method used in a second node for wireless communication, characterized in that, include: Send a first set of information blocks, the first set of information blocks configuring SBFD symbols for SpCell and random access opportunities in a first subband on the SBFD symbols; Specifically, an LBT failure indication is received; a consistent LBT failure for the active uplink BWP of the SpCell is triggered; the triggering of the consistent LBT failure for the active uplink BWP of the SpCell is used to determine that the active uplink BWP of the SpCell is switched to the first uplink BWP; a consistent LBT failure for the first uplink BWP is not triggered; the first uplink BWP depends on the random access opportunity configured in the first subband on the SBFD symbol; the first uplink BWP and the active uplink BWP are both located in the same carrier corresponding to the SpCell. The method in the second node according to claim 13 is characterized in that, include: Send the first signaling; The determination of the first uplink BWP also depends on the first signaling; The determination of the first signaling enabling the first uplink BWP depends on the frequency domain location of the random access opportunity in the first subband configured on the SBFD symbol. The method in the second node according to any one of claims 13 or 14 is characterized in that, The random access opportunity in the first subband configured on the SBFD symbol overlaps with K1 uplink BWPs in the frequency domain, but does not overlap with K2 uplink BWPs. The first uplink BWP is one of the K1 uplink BWPs. Wherein, K1 and K2 are both positive integers. The method in the second node according to claim 15 is characterized in that, The first subband on the SBFD symbol overlaps with at least one of the K2 uplink BWPs in the frequency domain. The method in the second node according to claim 15 or 16 is characterized in that, Random access opportunities are configured in both the K1 uplink BWP and the K2 uplink BWP. The method in the second node according to any one of claims 15 to 17 is characterized in that, At least one of the K1 uplink BWPs is not configured with a random access opportunity. The method in the second node according to any one of claims 13 to 18 is characterized in that, The SBFD symbols include at least one of the symbols configured as DL by tdd-UL-DL-ConfigurationCommon and the symbols configured as flexible by tdd-UL-DL-ConfigurationCommon. The method in the second node according to any one of claims 13 to 19 is characterized in that, The transmission direction in the first sub-band of the SBFD symbol is uplink; The SpCell operates in TDD mode. The method in the second node according to any one of claims 13 to 20 is characterized in that, include: An LBT failure MAC CE is generated, which indicates the SpCell; The triggered consistent LBT failure of the active uplink BWP for the SpCell was not canceled. The method in the second node according to any one of claims 13 to 21 is characterized in that, include: Upon receiving the LBT failure indication, the value of the first counter is incremented by 1. Wherein, the updated value of the first counter is not less than the first threshold. The method in the second node according to any one of claims 13 to 22 is characterized in that, include: Before the LBT failure is received, the first channel access procedure is performed for a planned uplink transmission in the active uplink BWP of the SpCell; Specifically, the channel was not accessed according to the first channel access procedure before the intended uplink transmission. A base station, characterized in that, The base station includes: one or more processors and a memory; The memory is coupled to the one or more processors, the memory being used to store computer program code, the computer program code including computer instructions, the one or more processors invoking the computer instructions to cause the base station to perform the method as described in any one of claims 13 to 23.

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