Transmission mode determination method, terminal, and network side device

Abstract

The present application belongs to the field of communications. Disclosed are a transmission mode determination method, a terminal, and a network side device. The transmission mode determination method in the embodiments of the present application comprises: for a first time unit corresponding to a first full-duplex resource, when a first condition is satisfied, a terminal determines that a transmission mode on the first time unit is a half-duplex transmission mode or a full-duplex transmission mode, the first condition comprising at least one of the following: the first time unit is configured with a first random access channel (RACH) resource, the terminal initiates first random access channel (RACH) transmission in the first time unit, the first time unit is configured with a monitoring occasion of a first physical downlink control channel (PDCCH) related to a random access channel (RACH), and the terminal monitors the first physical downlink control channel (PDCCH) related to the random access channel (RACH) in the first time unit.

Description

Method for determining transmission mode, terminal and network side device

[0001] Cross-reference to Related Applications

[0002] The present application claims priority to the Chinese patent application No. 202410821643.6, filed on June 24, 2024, and entitled "Method for determining transmission mode, terminal and network side device", the content of which is incorporated herein by reference in its entirety. TECHNICAL FIELD

[0003] The present application belongs to the field of communication technology, and specifically relates to a method for determining transmission mode, a terminal and a network side device. BACKGROUND

[0004] Full duplex transmission mode is a communication mode that allows simultaneous reception and transmission. This mode has significant advantages in improving spectrum utilization and communication efficiency.

[0005] In related technologies, when a terminal is in a full duplex transmission mode, a network side device can simultaneously configure full duplex resources and resources related to a random access procedure for the terminal. For example, random access channel (RACH) resources.

[0006] However, since the resources related to the random access procedure are usually semi-statically configured periodic resources, in order to ensure the performance of the random access, when the network side device configures the full duplex resources and the resources related to the random access procedure for the terminal, it is necessary to match the full duplex resources and the resources related to the random access procedure. For example, it is necessary to ensure that the subband in which the RACH resources are located is configured as an uplink subband. However, this resource configuration method not only reduces the flexibility of full duplex resource configuration, but also increases the complexity of full duplex resource configuration, thereby reducing the communication performance. SUMMARY

[0007] The embodiments of the present application provide a method for determining transmission mode, a terminal and a network side device, which can not only improve the flexibility of full duplex resource configuration, but also reduce the complexity of full duplex resource configuration on the basis of ensuring the performance of the random access, thereby improving the communication performance.

[0008] In a first aspect, a method for determining transmission mode is provided, which is executed by a terminal, and the method comprises:

[0009] For a first time unit corresponding to a first full duplex resource, in a case where a first condition is met, the terminal determines that a transmission mode on the first time unit is a half duplex transmission mode or a full duplex transmission mode.

[0010] The first condition comprises at least one of the following:

[0011] The first time unit is configured with first random access channel (RACH) resources.

[0012] The terminal initiates first random access channel (RACH) transmission in the first time unit.

[0013] The first time unit is configured with first physical downlink control channel (PDCCH) monitoring opportunities related to random access channel (RACH).

[0014] The terminal monitors first physical downlink control channel (PDCCH) related to random access channel (RACH) in the first time unit.

[0015] In a second aspect, a transmission mode determination method is provided, which is performed by a network side device, and the method comprises:

[0016] For a first time unit corresponding to a first full-duplex resource, the network side device determines a transmission mode on the first time unit as a half-duplex transmission mode or a full-duplex transmission mode if a first condition is met.

[0017] The first condition comprises at least one of the following:

[0018] The first time unit is configured with first random access channel (RACH) resources.

[0019] The network side device receives first random access channel (RACH) transmission in the first time unit.

[0020] The first time unit is configured with first physical downlink control channel (PDCCH) monitoring opportunities related to random access channel (RACH).

[0021] The network side device sends first physical downlink control channel (PDCCH) related to random access channel (RACH) in the first time unit.

[0022] In a third aspect, a transmission mode determination apparatus is provided, which comprises:

[0023] A processing module is configured to:

[0024] For a first time unit corresponding to a first full-duplex resource, the network side device determines a transmission mode on the first time unit as a half-duplex transmission mode or a full-duplex transmission mode if a first condition is met.

[0025] The first condition comprises at least one of the following:

[0026] The first time unit is configured with first random access channel (RACH) resources.

[0027] the terminal initiates a first random access channel, RACH, transmission in the first time unit;

[0028] the first time unit is configured with a first physical downlink control channel, PDCCH, monitoring occasion related to random access channel, RACH;

[0029] the terminal monitors a first physical downlink control channel, PDCCH, related to random access channel, RACH, in the first time unit.

[0030] In a fourth aspect, a transmission mode determination apparatus is provided, comprising:

[0031] a processing module, configured to:

[0032] for a first time unit corresponding to a first full-duplex resource pair, determine that a transmission mode on the first time unit is a half-duplex transmission mode or a full-duplex transmission mode if a first condition is met;

[0033] wherein the first condition comprises at least one of:

[0034] the first time unit is configured with a first random access channel, RACH, resource;

[0035] a network-side device receives a first random access channel, RACH, transmission in the first time unit;

[0036] the first time unit is configured with a first physical downlink control channel, PDCCH, monitoring occasion related to random access channel, RACH;

[0037] a network-side device transmits a first physical downlink control channel, PDCCH, related to random access channel, RACH, in the first time unit.

[0038] In a fifth aspect, a transmission mode determination apparatus is provided, the apparatus is configured to perform the steps of the method of the first aspect, or implement the steps of the method of the second aspect.

[0039] In a sixth aspect, a terminal is provided, comprising a processor and a memory, the memory stores programs or instructions executable on the processor, and the programs or instructions, when executed by the processor, implement the steps of the method of the first aspect.

[0040] In a seventh aspect, a terminal is provided, comprising a processor and a communication interface, wherein the processor is configured to:

[0041] For a first time unit corresponding to a first full-duplex resource, in a case where a first condition is met, determining that a transmission mode on the first time unit is a half-duplex transmission mode or a full-duplex transmission mode.

[0042] The first condition includes at least one of the following:

[0043] The first time unit is configured with a first random access channel (RACH) resource.

[0044] The terminal initiates a first random access channel (RACH) transmission in the first time unit.

[0045] The first time unit is configured with a first physical downlink control channel (PDCCH) monitoring opportunity related to a random access channel (RACH).

[0046] The terminal monitors a first physical downlink control channel (PDCCH) related to a random access channel (RACH) in the first time unit.

[0047] In an eighth aspect, a network-side device is provided, which includes a processor and a memory, the memory storing programs or instructions executable on the processor, and the programs or instructions, when executed by the processor, implement the steps of the method of the second aspect.

[0048] In a ninth aspect, a network-side device is provided, which includes a processor and a communication interface, and the processor is configured to:

[0049] For a first time unit corresponding to a first full-duplex resource, in a case where a first condition is met, determining that a transmission mode on the first time unit is a half-duplex transmission mode or a full-duplex transmission mode.

[0050] The first condition includes at least one of the following:

[0051] The first time unit is configured with a first random access channel (RACH) resource.

[0052] The network-side device receives a first random access channel (RACH) transmission in the first time unit.

[0053] The first time unit is configured with a first physical downlink control channel (PDCCH) monitoring opportunity related to a random access channel (RACH).

[0054] The network-side device transmits a first physical downlink control channel (PDCCH) related to a random access channel (RACH) in the first time unit.

[0055] In a tenth aspect, a readable storage medium is provided, and the readable storage medium stores a program or instructions, which are executed by a processor to implement the steps of the method in the first aspect or the steps of the method in the second aspect.

[0056] In an eleventh aspect, a wireless communication system is provided, and the wireless communication system includes a terminal and a network side device, the terminal is configured to implement the steps of the method in the first aspect, and the network side device is configured to implement the steps of the method in the second aspect.

[0057] In a twelfth aspect, a chip is provided, and the chip includes a processor and a communication interface, the communication interface is coupled to the processor, and the processor is configured to run a program or instructions to implement the method in the first aspect or the method in the second aspect.

[0058] In a thirteenth aspect, a computer program / program product is provided, and the computer program / program product is stored in a storage medium, and the computer program / program product is executed by at least one processor to implement the steps of the transmission mode determination method in the first aspect or the steps of the transmission mode determination method in the second aspect.

[0059] In the embodiments of the present application, for a first time unit corresponding to a first full-duplex resource, in a case where a first condition is met, the terminal determines a transmission mode on the first time unit as a half-duplex transmission mode or a full-duplex transmission mode; wherein the first condition includes at least one of the following: the first time unit is configured with a first RACH resource; the terminal initiates a first RACH transmission in the first time unit; the first time unit is configured with a first PDCCH monitoring opportunity related to RACH; and the terminal monitors a first PDCCH related to RACH in the first time unit.

[0060] In other words, in the case that the first condition is met, it is explained that the first time unit is not only configured with the first full duplex resource, but also involves the transmission related to the random access procedure, in this case, the terminal determines the transmission mode on the first time unit as the half duplex transmission mode or the full duplex transmission mode, which means that the terminal can perform the transmission related to the random access procedure on the first time unit based on the full duplex transmission mode, or can fall back to the half duplex transmission mode to perform the transmission related to the random access procedure, thereby, when the network side device configures the first full duplex resource or the random access procedure related resource for the terminal, even if the first full duplex resource and the random access procedure related resource do not match, the random access performance can still be guaranteed by falling back to the half duplex transmission mode, that is, the transmission mode determination method provided in the present application can not only improve the flexibility of full duplex resource configuration, but also reduce the complexity of full duplex resource configuration on the basis of guaranteeing the random access performance, thereby improving the communication performance.

[0061] In addition, in the case that the transmission mode on the first time unit is the half duplex transmission mode, the self-interference of the uplink transmission on the downlink reception can also be reduced, thereby improving the random access performance. BRIEF DESCRIPTION OF DRAWINGS

[0062] FIG. 1 is a schematic diagram of a communication system architecture provided by an embodiment of the present application.

[0063] FIG. 2 is an example of SBFD configuration provided by an embodiment of the present application.

[0064] FIG. 3 is another example of SBFD configuration provided by an embodiment of the present application.

[0065] FIG. 4 is an example of multiple slot formats provided by an embodiment of the present application.

[0066] FIG. 5 is an example of UE full duplex provided by an embodiment of the present application.

[0067] FIG. 6 is a schematic flow chart of a transmission mode determination method provided by an embodiment of the present application.

[0068] FIG. 7 is a schematic flow chart of another transmission mode determination method provided by an embodiment of the present application.

[0069] FIG. 8 is a schematic block diagram of a transmission mode determination apparatus provided by an embodiment of the present application.

[0070] FIG. 9 is a schematic block diagram of another transmission mode determination apparatus provided by an embodiment of the present application.

[0071] FIG. 10 is a schematic block diagram of a communication device provided by an embodiment of the present application.

[0072] FIG. 11 is a schematic diagram of a hardware structure of a terminal according to an embodiment of the present application.

[0073] FIG. 12 is a schematic diagram of a network-side device according to an embodiment of the present application. DETAILED DESCRIPTION

[0074] The technical solutions in the embodiments of the present application will be clearly described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, but not all the embodiments of the present application. Based on the embodiments in the present application, all the other embodiments obtained by those of ordinary skill in the art belong to the scope of protection of the present application.

[0075] The terms "first", "second", and the like in the present application are used to distinguish similar objects, and are not used to describe a specific order or sequence. It should be understood that the terms used in this way can be interchanged under appropriate circumstances, so that the embodiments of the present application can be implemented in an order other than those illustrated or described herein, and the objects distinguished by "first", "second" are generally a category and do not limit the number of objects, for example, the first object can be one or more. In addition, "or" in the present application means at least one of the connected objects. For example, the protection scope of "A or B" at least covers three schemes, namely, scheme one: including A and not including B; scheme two: including B and not including A; scheme three: including A and including B. In addition, the terms "A and / or B", "at least one of A and B", "at least one of A or B" also at least cover the above three schemes, respectively. The character " / " generally represents that the objects before and after are in an "or" relationship.

[0076] The term "indication" in the present application can be a direct indication (or explicit indication) or an indirect indication (or implicit indication). The direct indication can be understood as the sender explicitly informing the receiver of the specific information, the operation to be performed or the request result, etc. in the indication sent by the sender. The indirect indication can be understood as the receiver determining the corresponding information according to the indication sent by the sender, or judging and determining the operation to be performed or the request result, etc. according to the judgment result.

[0077] It is worth noting that the technology described in the embodiments of the present application is not limited to Long Term Evolution (LTE) / LTE-Advanced (LTE-A) systems, but can also be used in other wireless communication systems, such as Code Division Multiple Access (CDMA), Time Division Multiple Access (TDMA), Frequency Division Multiple Access (FDMA), Orthogonal Frequency Division Multiple Access (OFDMA), Single-carrier Frequency-Division Multiple Access (SC-FDMA) or other systems. The terms "system" and "network" in the embodiments of the present application are often used interchangeably, and the described technology can be used in the above-mentioned systems and radio technologies, as well as in other systems and radio technologies. The following description describes a New Radio (NR) system for example purposes, and NR terminology is used in most of the following description, but these technologies can also be applied to systems other than NR systems, such as 6th Generation (6G) communication systems. th

[0078] ​FIG. 1 shows a block diagram of a wireless communication system to which embodiments of the present application can be applied. The wireless communication system includes a terminal 11 and a network-side device 12. The terminal 11 can be a terminal-side device such as a mobile phone, a Tablet Personal Computer, a Laptop Computer, a notebook computer, a Personal Digital Assistant (PDA), a palmtop computer, a netbook, an Ultra-mobile Personal Computer (UMPC), a Mobile Internet Device (MID), an Augmented Reality (AR) device, a Virtual Reality (VR) device, a robot, a wearable device, a flight vehicle, a Vehicle User Equipment (VUE), a shipboard device, a Pedestrian User Equipment (PUE), a smart home (a home device with a wireless communication function such as a refrigerator, a television, a washing machine, or furniture), a game console, a Personal Computer (PC), a kiosk, or a self-service machine. The wearable device includes a smart watch, a smart bracelet, a smart earphone, smart glasses, smart jewelry (a smart bracelet, a smart necklace, a smart ring, a smart necklace, a smart anklet, a smart necklace, etc.), a smart wristband, smart clothing, etc. The vehicle-mounted device can also be referred to as a vehicle-mounted terminal, a vehicle-mounted controller, a vehicle-mounted module, a vehicle-mounted component, a vehicle-mounted chip, or a vehicle-mounted unit, etc. It should be noted that the specific type of the terminal 11 is not limited in the embodiments of the present application. The network-side device 12 can include an access network device or a core network device. The access network device can also be referred to as a Radio Access Network (RAN) device, a radio access network function, or a radio access network unit. The access network device can include a base station, a Wireless Local Area Network (WLAN) Access Point (AP), or a Wireless Fidelity (WiFi) node, etc.The base station can be referred to as a Node B (NB), an evolved Node B (eNB), a next generation Node B (gNB), a New Radio Node B (NR Node B), an access point, a relay base station (RBS), a serving base station (SBS), a base transceiver station (BTS), a radio base station, a radio transceiver, a basic service set (BSS), an extended service set (ESS), a home Node B (HNB), a home evolved Node B, a transmit / receive point (TRP), or some other suitable terminology in the art, and is not limited to a particular technical terminology, provided that the same technical effect is achieved. It should be noted that in the embodiments of the present application, only the base station in the NR system is taken as an example for introduction, and the specific type of the base station is not limited.

[0079] To better understand the embodiments of the present application, the related technologies of the present application are described.

[0080] (1) Random access procedure.

[0081] The random access procedure can be a contention-based random access procedure or a non-contention-based random access procedure. The random access procedure can be a four-step random access procedure (also called Type-1 random access procedure) or a two-step random access procedure (also called Type-2 random access procedure).

[0082] In the contention-based 4-step random access procedure, the UE first sends a message 1 (Msg1) containing a preamble to the network; after the network detects the preamble, it sends a Msg2 / Random Access Response (RAR) message containing the number of the preamble detected by the network and the uplink radio resource allocated to the UE to send Msg3; after the UE receives Msg2, it confirms that at least one of the preamble numbers carried in Msg2 is consistent with the preamble number it sent, and then sends Msg3 containing contention resolution information according to the resource indicated by the RAR; after the network receives Msg3, it sends Msg4 containing contention resolution information; after the UE receives Msg4, it confirms that the resolution information is consistent with the information it sent in Msg3, and the 4-step random access is completed.

[0083] The network includes uplink grant (UL grant) information in the RAR for indicating Msg3 Physical Uplink Shared Channel (PUSCH) scheduling information, and includes Random Access Preamble Identifier (RAPID), temporal Cell Radio Network Temporary Identifier (TC-RNTI), timing advance (TA), and the like. If the network does not receive the Msg3 PUSCH, the network can schedule retransmission of the Msg3 PUSCH in a Physical Downlink Control Channel (PDCCH) scrambled by the TC-RNTI.

[0084] For the contention-based random access procedure, different UEs randomly select a preamble for transmission, so different UEs can select the same preamble for transmission on the same time-frequency radio resource, which can be understood as a preamble collision of the UEs. In this case, different UEs can receive the same RAR, and then the different UEs can perform Msg3 PUSCH transmission according to scheduling information in the uplink grant (UL grant) of the RAR. The network can only decode one PUSCH (containing contention resolution information) sent by one UE on one Msg3 PUSCH scheduling resource, so the network can include contention resolution information received in the Msg3 in the Msg4. If the contention resolution information in the Msg4 received by the UE matches the contention resolution information sent by the UE in the Msg3 PUSCH, the UE can consider that the contention resolution is successful. If the contention resolution information in the Msg4 received by the UE does not match the contention resolution information sent by the UE in the Msg3 PUSCH, the UE can consider that the contention resolution is not successful.

[0085] If the contention resolution is not successful, the UE reselects a Random Access Channel (RACH) transmission resource, performs Physical Random Access Channel (PRACH) transmission, and performs the next random access attempt.

[0086] In NR Rel-16, a two-step random access procedure (2-step RACH), also called Type-2 random access procedure, is introduced. The first step is that UE sends MsgA to the network side device. After the network side device receives MsgA, it sends MsgB to the UE. If the UE does not receive MsgB within a certain time, the UE will add one to the counter that counts the number of times MsgA is sent and resend MsgA. If the counter that counts the number of times MsgA is sent reaches a certain threshold, the UE will switch from the 2-step random access procedure to the 4-step random access procedure. Random access message MsgA includes a MsgA preamble part and a MsgA PUSCH part. The MsgA preamble part is sent on a PRACH opportunity for 2-step RACH, and the MsgA PUSCH part is sent on a MsgA PUSCH resource associated with the PRACH opportunity for sending the MsgA preamble. The MsgA PUSCH resource is a set of PUSCH resources configured relative to each PRACH slot, including time-frequency resources and demodulation reference signal (DMRS) resources.

[0087] (2) Uplink power control.

[0088] In the design of the NR system, new features are considered to be introduced in the uplink, such as uplink transmission based on orthogonal frequency division multiplexing (OFDM) and single-symbol uplink control channels. Uplink power control is also an important content, including the following knowledge points:

[0089] No cell-specific reference signal for path loss estimation similar to long term evolution (LTE);

[0090] Beam-based transmission / reception;

[0091] Analog beamforming at gNB / UE;

[0092] Multi-beam / multi-stream transmission;

[0093] Multiple numerologies;

[0094] Information exchange between transmission reception points (TRPs).

[0095] 1. Path loss compensation.

[0096] There are two path loss compensation manners considered in the current LTE system uplink power control; one is full path loss compensation, and the other is partial path loss compensation.

[0097] In the NR system, it can be considered that the UE measures the reference signal receiving power (RSRP) by using a specific type of reference signal (RS), and then the UE derives the path loss between the UE and the gNB associated therewith by using the RSRP.

[0098] By considering the estimated path loss, the uplink transmission power from the UE will be fully or partially compensated. First, full path loss compensation can maximize the fairness of the cell edge UE, in other words, the power received at the gNB side from the cell edge UE will be comparable to the power received from the cell center UE. On the other hand, if partial path loss compensation is used, the received power at the gNB side from the cell center UE will be much higher than the received power from the cell edge UE. The path loss of the cell edge UE can be compensated by adjusting other power parameters or offsets, so that the power received from the cell edge UE can be properly controlled, while the power received from the cell center UE can be redundant due to the already sufficient received power.

[0099] In the case of uplink data channel transmission, this redundant power can be used to improve the spectral efficiency by applying a higher modulation and coding scheme (MCS) level (for example, the cell center UE can use fewer physical resource blocks (PRBs) for the same transmission block (TB) size). On the other hand, in the case of uplink control channel transmission using a fixed amount of resources, it is unclear how to use the redundant power to improve the spectral efficiency, because the uplink control information (UCI) size will not depend on the UE location or channel conditions. Therefore, it is better to consider full compensation for uplink control channel power control.

[0100] In addition, in the case of partial path loss compensation for uplink data channel transmission, the value of the partial path loss compensation factor can be used to adjust the received power difference between the cell center UE and the cell edge UE, and the value can be different according to the cell radius and target performance.

[0101] 2. Transmit power control (TPC) command.

[0102] TPC commands can be used to compensate for channel variations due to fast fading. With respect to current LTE, Physical Uplink Control Channel (PUCCH) power can be adjusted by TPC commands signaled in downlink assignment Downlink Control Information (DCI), while PUSCH (or Sounding Reference Signal (SRS)) power can be adjusted by TPC commands signaled in uplink grant DCI. In addition, for uplink transmissions without associated DCI, such as semi-persistent scheduling (SPS), periodic Channel State Information (CSI), or SRS, TPC commands can be signaled to a specific UE group by using DCI format 3 / 3A. There are two types of TPC procedures used to update uplink transmit power; one is accumulative TPC, and the other is absolute TPC. Accumulative TPC is well suited for fine tuning UE transmit power by using a relatively small step size of TPC values. On the other hand, by using a relatively large step size of TPC values, absolute TPC can be used to immediately (or timely) increase UE transmit power.

[0103] 3. Additional functions of power control in NR.

[0104] In NR design, it is necessary to consider deployments based on analog (or hybrid) beamforming, especially for high frequency bands (e.g., above 6 GHz). With such analog beamforming, gNB TX / RX beam sweeping (e.g., Time Division Multiplexing (TDM) between different gNB TX / RX beams) can be needed, not only for transmission of downlink common signals and information, such as synchronization signals (e.g., Primary Synchronization Signal (PSS) / Secondary Synchronization Signal (SSS) in LTE) or broadcast system information (e.g., Physical Broadcast Channel (PBCH) in LTE), but also for transmission of uplink and downlink control and data channels in order to serve UEs located in different areas (or beam directions). In this case, it can be necessary to consider differentiation of power control parameters between different beams for a UE, as the power needed for UE performance will be different for each beam of the UE.

[0105] Generally, the amount of information transmitted through the uplink data channel will be much larger than the uplink control channel. Therefore, the power required for the uplink data channel transmission will also be greater than the power of the uplink control channel. For NR design, TDM is considered for the multiplexing structure between uplink data and control channels to reduce latency, flexible uplink and downlink configuration, and analog beamforming. In the case of TDM multiplexing of uplink data and control channels, it is necessary to handle the power imbalance between the two different channels, which can be greater than the current LTE. In addition, considering various OFDM numerology (e.g., different subcarrier spacing or symbol duration) for NR, it is also necessary to handle the power transient period between uplink data and control channels for certain numerology (e.g., large subcarrier spacing).

[0106] 4. Per-TRP and per-layer power control.

[0107] For high frequency bands in NR, the number of dominant rays per TRP or single panel can be limited, and in order to achieve high Single-User Multiple-Input Multiple-Output (SU MIMO) spectral efficiency, it is necessary to thoroughly study coordinated transmission schemes across multiple TRPs in NR, including Coordinated Multi-Point Dynamic Point Selection (CoMP DPS) and Independent Layers Joint Transmission (JT). When the DCI related to the downlink indicates the transmission rank and the applied coordination scheme, the DCI decoding delay on the UE side can be a major problem whenever analog beamforming is applied in a given time instance. This is because the DCI transmission can be performed by the serving TRP, but the actual data transmission can be performed by another TRP, for example.

[0108] In the case of JT, where a particular layer can be transmitted from different TRPs, the uplink transmission power corresponding to each layer group can need to be configured and controlled by the gNB, as at least the path loss from different TRPs can be different. In addition, separate uplink power control procedures for different TRPs need to be further studied in the context of uplink CoMP.

[0109] (3) Target received power of the preamble.

[0110] The target received power PREAMBLE_RECEIVED_TARGET_POWER of the preamble is calculated by the following equation: preambleReceivedTargetPower + DELTA_PREAMBLE + (PREAMBLE_POWER_RAMPING_COUNTER - 1) x PREAMBLE_POWER_RAMPING_STEP;

[0111] Where preambleReceivedTargetPower is the initial power of the preamble that the gNB expects to receive, DELTA_PREAMBLE is related to the preamble format; PREAMBLE_POWER_RAMPING_STEP is the transmit power to be increased next time of access after each access failure, PREAMBLE_POWER_RAMPING_COUNTER is the number of times of increasing the transmit power.

[0112] The calculation formula of the actual transmit power of the preamble is: P PRACHb,f,c (i) = min{P CMAX,f,c (i), P PRACH,target,f,c + PL b,f,c}[dBm];

[0113] Where P CMAX,f,c (i) is the maximum transmission power configured to the UE (the maximum power of UE transmission is 23dBm) of the carrier f of the serving cell C at the transmission opportunity i; P PRACH,target,f,c is the target received power PREAMBLE_RECEIVED_TARGET_POWER of the physical random access channel (PRACH) on the active UL bandwidth part (BWP) b of the carrier f of the serving cell C; PL b,f,c is the path loss of the active UL BWP b of the carrier f based on the DL RS associated with the PRACH transmission on the active DL BWP of the serving cell C, and PL b,f,c is equal to the reference signal power (referenceSignalPower) dB-higher layer filtered RSRP, for example, the higher layer filtering can be the Radio Resource Control (RRC) layer filtering.

[0114] If PL b,f,cBased on the DL BWP is the initial DL BWP and for synchronization signal and / or physical broadcast channel block (SSB) and control resource set (CORESET) multiplexing mode 2 or 3, the UE determines the PL based on the SSB associated with the PRACH transmission b,f,c .

[0115] (4) PRACH power control.

[0116] The initial transmission power of the UE is first related to two factors: the initial reception power (sensitivity) expected by the base station and the path loss between the base station and the UE. The base station informs the UE in advance of the initial reception power (preamble initial received target power in LTE, preamble received target power in NR) and the reference signal transmission power (reference signal power in LTE, SSB power (ss PBCH-Block Power) and synchronization signal power control offset (power Control Offset SS) (for CSI-RS) in NR), and the UE can calculate the path loss (reference signal transmission power - reference signal reception power) and the initial transmission power (base station initial reception power + path loss) by combining the actually measured reference signal reception power.

[0117] In NR, due to the cancellation of CRS (reduction of always-on signal overhead), the reference signal measured by the UE is SSB (Synchronization Signal Block) or CSI-RS (Channel-State information reference signal). In LTE, the path loss is denoted as PL c In NR, due to the introduction of the concept of BWP (Bandwidth Part), the path loss is denoted as PL b,f,c (b represents BWP, f represents carrier, and c represents cell).

[0118] In NR, the mechanism of MSG1 power ramping is similar to LTE, but with slight differences. In NR, the PRACH (Occasion) where the UE transmits MSG1 is associated with an SSB beam. If the UE reselects a RA resource that selects the same SSB beam or Channel State Information Reference Signal (CSI-RS) beam (and does not receive a notification from the lower layers to suspend power ramping), the UE will ramp up the transmission power for the retransmission of MSG1. If the UE selects a different SSB beam or CSI-RS beam, the UE will not (this time) ramp up the transmission power.

[0119] In NR, the mechanism of Msg1 power ramping is similar to LTE, but with slight differences. In NR, the PRACH (Occasion) where the UE transmits Msg1 is associated with an SSB beam. If the UE reselects a RA resource that selects the same SSB beam or CSI-RS beam (and does not receive a notification from the lower layers to suspend power ramping), the UE will ramp up the transmission power for the retransmission of Msg1. If the UE selects a different SSB beam or CSI-RS beam, the UE will not (this time) ramp up the transmission power.

[0120] The preamble of PRACH is configured with P PRACH,target Like the function of p0, a is fixed to 1. If the PRACH transmitted according to such a configuration does not receive a RAR, the UE will perform power ramping until the power reaches P CMAX or the PRACH receives a RAR.

[0121] (5) Full duplex transmission mode.

[0122] In 5G mobile communication system, full duplex is enhanced to adapt to diversified scenarios and service requirements. The main scenarios of 5G include: enhanced mobile broadband (eMBB), ultra-reliable and low latency communication (URLLC), massive machine type of communication (mMTC). Among them, eMBB aims to provide users with multimedia content, services and data, and its demand is growing rapidly. Since eMBB can be deployed in different scenarios, such as indoor, urban, rural, etc., the difference between its capabilities and requirements is also large, so it cannot be generalized and can be analyzed in detail in combination with the specific deployment scenario. Typical applications of URLLC include industrial automation, power automation, remote medical operations (surgery), traffic safety protection, etc. The typical characteristics of mMTC include: high connection density, small data volume, delay-insensitive service, low-cost module and long service life, etc. These scenarios require high reliability, low latency, large bandwidth, wide coverage, etc. from the system.

[0123] In NR, configuring full duplex operation can significantly improve the latency and coverage performance of TDD systems.

[0124] 1. Sub-band non-overlapping full duplex (SBFD).

[0125] Sub-band non-overlapping full duplex can improve transmission latency and enhance coverage.

[0126] For a downlink slot (DL slot) (which can be configured by tdd-UL-DL-ConfigurationCommon or tdd-UL-DL-ConfigurationDedicated), the network side device configures the UE with a configured DL BWP; optionally, the network side device can also configure the UE with an UL sub-band for the downlink slot.

[0127] For example, as shown in FIG. 2, there are the following two cases:

[0128] Case 1: Configure DL BWP, i.e., slot 1.

[0129] Case 2: Configure DL BWP and UL sub-band, i.e., slot 2.

[0130] For an uplink slot (UL slot) (e.g., which can be configured by tdd-UL-DL-ConfigurationCommon or tdd-UL-DL-ConfigurationDedicated), the network-side device configures the UE with a configured UL BWP; optionally, the network-side device can also configure a DL subband for the uplink slot.

[0131] For example, as shown in FIG. 3, there are the following two cases:

[0132] Case 3: UL BWP is configured, i.e., slot 1.

[0133] Case 4: UL BWP and DL subband are configured, i.e., slot 2.

[0134] For SBFD, one SBFD subband is composed of 1 RB or one continuous RB set with the same transmission direction. A time unit (e.g., slot or symbol) in which the gNB uses SBFD can be referred to as an SBFD time unit (e.g., slot or symbol).

[0135] FIG. 4 is an example of a slot format provided by an embodiment of the present application.

[0136] As shown in (a) of FIG. 4, for Rel-15, the gNB and the UE can only transmit or receive at one time.

[0137] As shown in (b) of FIG. 4, for Rel-18, the gNB is full-duplex, and the gNB can simultaneously transmit and receive, while the UE can only adopt a half-duplex mode, i.e., can only transmit or receive at one time.

[0138] As shown in (c) of FIG. 4, for UE full-duplex, the gNB and the UE can simultaneously transmit and receive.

[0139] For UE full-duplex, as shown in FIG. 5, a larger guard band (GB) (larger than that of gNB full-duplex) can be needed to suppress or reduce self-interference.

[0140] For a communication device, simultaneous UL reception and DL transmission can cause self-interference. In order to ensure the transmission of the interfered direction, the communication device needs to have self-interference cancellation capability, e.g., a reserved guard band between the reception frequency band and the transmission frequency band, but this will reduce the throughput of the UE.

[0141] In 5G and future 6G systems, both the base station and the terminal can adopt a full-duplex mode.

[0142] For ease of description, the terms involved in the technical solutions provided by the present application are described below.

[0143] Enhanced duplex, enhanced duplex mode, cross division duplex (XDD), enhanced full duplex, enhanced full duplex mode, full duplex, sub-band full duplex can refer to one concept in this application.

[0144] Random Access (RA) in this application refers to a random access procedure.

[0145] The random access procedure described in this application can be performed by a terminal in a connected state or in a non-connected state (including an idle / inactive state).

[0146] The random access resource referred to in this application includes at least one of the following: contention based RACH (CBRA) random access resource, contention free RACH (CFRA) random access resource, 4-step RACH corresponding random access resource, 2-step RACH corresponding random access resource.

[0147] The mapping of Synchronization Signal Block (SSB) to Physical Random Access Channel transmission opportunity (PRACH occasion (RO) referred to in this application can also refer to the association between a general downlink signal and an uplink signal / resource, such as the relationship between Channel State Information Reference Signal (CSI-RS) and RO. RO refers to the time-frequency resource required to send a Physical Random Access Channel (PRACH) sequence. SSB and Synchronization Signal / PBCH Block (SS / PBCH Block) can be used interchangeably, or other names can be used, which can refer to any module containing at least part of the synchronization signal, broadcast signal or other downlink broadcast signal.

[0148] The time unit referred to in this application can include at least one of the following: one or more slots, one or more symbols, one or more subframes, one or more mini-slots, etc. For example, the time unit, slot, symbol, subframe, and mini-slot referred to in this application can be used interchangeably.

[0149] The subband referred to in the present application can refer to a frequency domain resource, which includes at least one of the following: one or more resource block (RB) sets, one or more bandwidth parts (BWP), one or more carriers, etc. For example, the time unit, RB set, BWP, and carrier referred to in the present application can be used interchangeably. Multiple subbands can form a subband set.

[0150] The RACH resource referred to in the present application includes at least one corresponding resource (such as a time domain resource and / or a frequency domain resource): Msg1, PRACH, preamble, MsgA, MsgA PRACH, MsgA PUSCH, Msg3 PUSCH, RA-SDT, PUSCH scheduled by DCI scrambled by TC-RNTI.

[0151] The RACH transmission referred to in the present application includes at least one corresponding transmission: Msg1, PRACH, preamble, MsgA, MsgA PRACH, MsgA PUSCH, Msg3 PUSCH, RACH based small data transmission (RA-SDT), PUSCH scheduled by downlink control information (DCI) scrambled by a temporary cell radio network temporary identifier (TC-RNTI), etc.

[0152] The PDCCH monitoring opportunity related to RACH referred to in the present application includes at least one corresponding monitoring opportunity: Msg2, random access response (RAR), MsgB, Msg4, and PDCCH corresponding to Msg3.

[0153] The PDCCH related to RACH referred to in the present application includes at least one of the following: PDCCH corresponding to Msg2, RAR, MsgB, Msg4, and Msg3.

[0154] The transmission mode determination method provided by the embodiments of the present application will be described in detail in combination with the accompanying drawings, some embodiments, and application scenarios.

[0155] FIG. 6 is a schematic flow chart of a transmission mode determination method 200 according to an embodiment of the present application.

[0156] As shown in FIG. 6, the transmission mode determination method 200 can include at least part of the following contents:

[0157] S210, for a first time unit corresponding to a first full-duplex resource, in a case where a first condition is met, the terminal determines a transmission mode on the first time unit as a half-duplex transmission mode or a full-duplex transmission mode.

[0158] The first condition includes at least one of the following:

[0159] The first time unit is configured with a first RACH resource.

[0160] The terminal initiates a first RACH transmission in the first time unit.

[0161] The first time unit is configured with a first PDCCH monitoring opportunity related to RACH.

[0162] The terminal monitors a first PDCCH related to RACH in the first time unit.

[0163] Exemplarily, the first full-duplex resource includes a full-duplex transmission resource corresponding to the terminal side (also referred to as a full-duplex resource of the terminal) or a full-duplex transmission resource corresponding to the network side (also referred to as a full-duplex resource of the network side device).

[0164] Exemplarily, the first full-duplex resource corresponding to the first time unit includes that the first time unit is configured with the first full-duplex resource. Optionally, the first full-duplex resource includes a frequency domain resource configured on a TDD time unit, for example, the first full-duplex resource includes an uplink sub-band and / or a downlink sub-band. Optionally, the first full-duplex resource includes a time domain resource and / or a frequency domain resource, for example, the first full-duplex resource is an SBFD resource, which can include an SBFD time domain resource and / or an SBFD frequency domain resource.

[0165] Exemplarily, the first RACH resource includes an RO of 4-step random access, or an RO of 2-step random access or a PUSCH occasion (PO).

[0166] Exemplarily, the first RACH resource comprises at least one corresponding resource (e.g., time domain resource and / or frequency domain resource) of the following: Msg1, PRACH, preamble, MsgA, MsgA PRACH, MsgA PUSCH, Msg3 PUSCH, RA-SDT, PUSCH scheduled by DCI scrambled by TC-RNTI.

[0167] Exemplarily, the first RACH transmission can be a RACH transmission corresponding to a given (e.g., indicated by a network side device) RACH procedure. Optionally, the given RACH procedure comprises 4-step RACH, 2-step RACH, RACH for coverage enhancement, RACH for beam failure recovery, RACH for reduced capability (RedCap) terminal, RACH for requesting on-demand system information block (On-demand SIB), etc. Alternatively, the first RACH transmission can be a RACH transmission initiated in a given (e.g., indicated by a network side device) resource. Optionally, the given resource comprises a given subband, BWP, frequency point, frequency band, frequency layer, cell, etc.

[0168] Exemplarily, the first RACH transmission comprises at least one corresponding transmission of the following: Msg1, PRACH, preamble, MsgA, MsgA PRACH, MsgA PUSCH, Msg3 PUSCH, RA-SDT, PUSCH scheduled by DCI scrambled by TC-RNTI, etc.

[0169] Exemplarily, the first RACH resource is a RACH resource configured by a network side device, and the terminal initiates the first RACH transmission in the second RACH resource of the first time unit. Wherein, the first RACH resource and the second RACH resource can be the same or different. For example, the first RACH resource can comprise the second RACH resource.

[0170] Exemplarily, the first PDCCH monitoring opportunity comprises at least one corresponding monitoring opportunity of the following: PDCCH for Msg2, RAR, MsgB, Msg4, Msg3.

[0171] Exemplarily, the first PDCCH is a PDCCH monitoring opportunity in a monitoring window of Msg2 or RAR initiated after the terminal initiates the RACH transmission.

[0172] Exemplarily, the first PDCCH comprises at least one of the following: a Msg2, a RAR, a MsgB, a Msg4, and a PDCCH corresponding to a Msg3.

[0173] Exemplarily, the first PDCCH monitoring opportunity is a PDCCH monitoring opportunity configured by the network side, and the terminal monitors the first PDCCH in a second PDCCH monitoring opportunity of the first time unit. The first PDCCH monitoring opportunity and the second PDCCH monitoring opportunity can be the same or different. For example, the first PDCCH monitoring opportunity can include the second PDCCH monitoring opportunity.

[0174] In this embodiment, when the first condition is met, it is explained that the first time unit is not only configured with the first full-duplex resource, but also involves a transmission related to a random access process. In this case, the terminal determines that the transmission mode on the first time unit is a half-duplex transmission mode or a full-duplex transmission mode, which means that the terminal can perform a transmission related to a random access process based on the full-duplex transmission mode on the first time unit, or can fall back to a half-duplex transmission mode to perform a transmission related to a random access process. Therefore, when the network side device configures the first full-duplex resource or the resource related to the random access process for the terminal, even if the first full-duplex resource and the resource related to the random access process do not match, the random access performance can still be guaranteed by falling back to the half-duplex transmission mode. That is, the transmission mode determination method provided by the present application not only improves the flexibility of full-duplex resource configuration, but also reduces the complexity of full-duplex resource configuration on the basis of guaranteeing the random access performance, thereby improving the communication performance.

[0175] In addition, when the transmission mode on the first time unit is a half-duplex transmission mode, the self-interference of uplink transmission on downlink reception can also be reduced, thereby improving the random access performance.

[0176] It should be understood that for the first time unit corresponding to the first full-duplex resource, the present application aims to explain that the terminal can determine that the transmission mode on the first time unit is a half-duplex transmission mode or a full-duplex transmission mode, and the present application does not limit the specific description manner. For example, an alternative description can be: for the first time unit corresponding to the first full-duplex resource, the terminal can determine that the transmission mode on the first time unit is a half-duplex transmission mode or a full-duplex transmission mode according to the first information: a first RACH resource configured by the first time unit; a first RACH transmission initiated by the terminal in the first time unit; a first PDCCH monitoring opportunity related to RACH configured by the first time unit; and a first PDCCH related to RACH monitored by the terminal in the first time unit.

[0177] In some embodiments, the S210 comprises:

[0178] In case that the second condition is satisfied, the terminal determines the transmission mode on the first time unit as the full duplex mode:

[0179] wherein the second condition further comprises at least one of:

[0180] The first RACH resource is located in an uplink sub-band of the first full duplex resource;

[0181] The first RACH resource does not overlap with a downlink sub-band of the first full duplex resource or a guard band of the first full duplex resource;

[0182] The RACH resource corresponding to the first RACH transmission is located in an uplink sub-band of the first full duplex resource;

[0183] The RACH resource corresponding to the first RACH transmission does not overlap with a downlink sub-band of the first full duplex resource or a guard band of the first full duplex resource;

[0184] The frequency domain interval between the RACH resource corresponding to the first RACH transmission and the downlink sub-band of the first full duplex resource is greater than or equal to a first preset interval;

[0185] The frequency domain resource corresponding to the first PDCCH monitoring opportunity is located in a downlink sub-band of the first full duplex resource;

[0186] The frequency domain resource corresponding to the first PDCCH monitoring opportunity does not overlap with an uplink sub-band of the first full duplex resource or a guard band of the first full duplex resource;

[0187] The frequency domain resource corresponding to the first PDCCH is located in a downlink sub-band of the first full duplex resource;

[0188] The frequency domain resource corresponding to the first PDCCH does not overlap with an uplink sub-band of the first full duplex resource or a guard band of the first full duplex resource;

[0189] The frequency domain interval between the frequency domain resource corresponding to the first PDCCH and the uplink sub-band of the first full duplex resource is greater than or equal to a second preset interval.

[0190] Exemplarily, in case that the first full duplex resource satisfies the second condition, the terminal determines the transmission mode on the first time unit as the full duplex mode.

[0191] Exemplarily, the first RACH resource is located in an uplink sub-band of the first full-duplex resource, including: all resources or part of resources of the first RACH resource are located in the uplink sub-band of the first full-duplex resource. In the case that the part of resources are located in the uplink sub-band of the first full-duplex resource, the part of resources are used for full-duplex transmission mode, i.e., the transmission mode of the part of resources of the first time unit is full-duplex transmission mode.

[0192] For example, taking the case that the first full-duplex resource satisfies that the first RACH resource is located in an uplink sub-band of the first full-duplex resource as an example, assuming that the first time unit is configured with RACH resource 1 and RACH resource 2, which is equivalent to that the first RACH resource includes RACH resource 1 and RACH resource 2, and the first RACH resource is located in a downlink sub-band of the first full-duplex resource, including: the RACH resource 1 is located in the downlink sub-band of the first full-duplex resource, and / or the RACH resource 2 is located in the downlink sub-band of the first full-duplex resource. For example, if the RACH resource 1 is located in the downlink sub-band of the first full-duplex resource, and the RACH resource 2 is located in the uplink sub-band of the first full-duplex resource, it indicates that the RACH resource 1 satisfies the second condition, and accordingly, the RACH resource 1 is used for full-duplex transmission mode, i.e., the terminal determines that the transmission mode of the RACH resource 1 of the first time unit is the full-duplex mode.

[0193] Exemplarily, the frequency domain resource corresponding to the first PDCCH monitoring opportunity is located in a downlink sub-band of the first full-duplex resource, including: all resources or part of resources corresponding to the first PDCCH monitoring opportunity are located in the downlink sub-band of the first full-duplex resource. In the case that the part of resources are located in the downlink sub-band of the first full-duplex resource, the part of resources are used for full-duplex transmission mode, i.e., the transmission mode of the part of resources of the first time unit is full-duplex transmission mode.

[0194] For example, taking the case that the frequency domain resource corresponding to the first PDCCH monitoring opportunity is located in the downlink sub-band of the first full-duplex resource, assuming that the first time unit is configured with a PDCCH monitoring opportunity 1 and a PDCCH monitoring opportunity 2 related to RACH, that is, the first PDCCH monitoring opportunity includes the PDCCH monitoring opportunity 1 and the PDCCH monitoring opportunity 2, and the frequency domain resource corresponding to the first PDCCH monitoring opportunity is located in the downlink sub-band of the first full-duplex resource, including: the frequency domain resource corresponding to the PDCCH monitoring opportunity 1 is located in the downlink sub-band of the first full-duplex resource, and / or the frequency domain resource corresponding to the PDCCH monitoring opportunity 2 is located in the downlink sub-band of the first full-duplex resource. For example, if the frequency domain resource corresponding to the PDCCH monitoring opportunity 1 is located in the downlink sub-band of the first full-duplex resource, and the frequency domain resource corresponding to the PDCCH monitoring opportunity 2 is located in the uplink sub-band of the first full-duplex resource, it indicates that the frequency domain resource corresponding to the PDCCH monitoring opportunity 1 meets the second condition, and accordingly, the frequency domain resource corresponding to the PDCCH monitoring opportunity 1 is used for full-duplex transmission mode, that is, the terminal determines the transmission mode of the frequency domain resource corresponding to the PDCCH monitoring opportunity 1 of the first time unit to be the full-duplex mode.

[0195] For example, the RACH resource corresponding to the first RACH transmission is located in the uplink sub-band of the first full-duplex resource, including: the terminal initiates the first RACH transmission at a second RACH resource in the first time unit, and the second RACH resource is located in the uplink sub-band of the first full-duplex resource.

[0196] For example, the RACH resource corresponding to the first RACH transmission does not overlap with the downlink sub-band of the first full-duplex resource or the guard band of the first full-duplex resource, including: the terminal initiates the first RACH transmission at a second RACH resource in the first time unit, and the second RACH resource does not overlap with the downlink sub-band of the first full-duplex resource or the guard band of the first full-duplex resource.

[0197] For example, the frequency domain interval between the RACH resource corresponding to the first RACH transmission and the downlink sub-band of the first full-duplex resource is greater than or equal to a first preset interval, including: the terminal initiates the first RACH transmission at a second RACH resource in the first time unit, and the frequency domain interval between the second RACH resource and the downlink sub-band of the first full-duplex resource is greater than or equal to the first preset interval.

[0198] Exemplarily, the frequency domain resource corresponding to the first PDCCH is located in a downlink sub-band of the first full-duplex resource, and the method comprises: the terminal listens to the first PDCCH in a second PDCCH monitoring opportunity of the first time unit, and the frequency domain resource corresponding to the second PDCCH monitoring opportunity is located in the downlink sub-band of the first full-duplex resource.

[0199] Exemplarily, the frequency domain resource corresponding to the first PDCCH does not overlap with an uplink sub-band of the first full-duplex resource or a guard band of the first full-duplex resource, and the method comprises: the terminal listens to the first PDCCH in a second PDCCH monitoring opportunity of the first time unit, and the frequency domain resource corresponding to the second PDCCH monitoring opportunity does not overlap with the uplink sub-band of the first full-duplex resource or the guard band of the first full-duplex resource.

[0200] Exemplarily, a frequency domain interval between the frequency domain resource corresponding to the first PDCCH and the uplink sub-band of the first full-duplex resource is greater than or equal to a second preset interval, and the method comprises: the terminal listens to the first PDCCH in a second PDCCH monitoring opportunity of the first time unit, and a frequency domain interval between the frequency domain resource corresponding to the second PDCCH monitoring opportunity and the uplink sub-band of the first full-duplex resource is greater than or equal to the second preset interval.

[0201] Exemplarily, the first preset interval or the second preset interval can be a protocol-agreed value or a value pre-configured by the network side device.

[0202] In this embodiment, in the case where the second condition is met, it is explained that the first full-duplex resource is a full-duplex resource matched with random access, and in this case, the terminal determines that the transmission mode on the first time unit is a full-duplex transmission mode, which can guarantee the random access performance.

[0203] Of course, in other alternative embodiments, the second condition can be constructed by other dimensions, which is not limited in the application.

[0204] For example, the second condition can comprise at least one of the following: the information transmitted by the first RACH transmission is not retransmission information; and the information transmitted by the first PDCCH is not retransmission information.

[0205] In some embodiments, the S210 comprises:

[0206] In the case where the third condition is met, the terminal determines that the transmission mode on the first time unit is the half-duplex transmission mode:

[0207] The third condition further comprises at least one of the following:

[0208] The first RACH resource is located in an uplink sub-band of the first full-duplex resource, and a frequency domain interval between the RACH resource corresponding to the first RACH transmission and a downlink sub-band of the first full-duplex resource is less than a first preset interval.

[0209] The first RACH resource is located in a sub-band other than the uplink sub-band of the first full-duplex resource.

[0210] The first RACH resource overlaps with a downlink sub-band of the first full-duplex resource or a guard band of the first full-duplex resource.

[0211] The RACH resource corresponding to the first RACH transmission is located in a sub-band other than the uplink sub-band of the first full-duplex resource.

[0212] The RACH resource corresponding to the first RACH transmission overlaps with a downlink sub-band of the first full-duplex resource or a guard band of the first full-duplex resource.

[0213] The RACH resource corresponding to the first PDCCH monitoring opportunity is located in a downlink sub-band of the first full-duplex resource, and a frequency domain interval between the RACH resource corresponding to the first PDCCH and an uplink sub-band of the first full-duplex resource is less than a second preset interval.

[0214] The RACH resource corresponding to the first PDCCH monitoring opportunity is located in a sub-band other than the downlink sub-band of the first full-duplex resource.

[0215] The RACH resource corresponding to the first PDCCH monitoring opportunity overlaps with an uplink sub-band of the first full-duplex resource or a guard band of the first full-duplex resource.

[0216] The frequency domain resource corresponding to the first PDCCH is located in a sub-band other than the downlink sub-band of the first full-duplex resource.

[0217] The frequency domain resource corresponding to the first PDCCH overlaps with an uplink sub-band of the first full-duplex resource or a guard band of the first full-duplex resource.

[0218] Illustratively, the first RACH transmission corresponding to the RACH resource overlaps with a downlink sub-band of the first full-duplex resource or a guard band of the first full-duplex resource, including that the RACH resource corresponding to the first RACH transmission partially or entirely overlaps with the downlink sub-band of the first full-duplex resource or the guard band of the first full-duplex resource.

[0219] Exemplarily, the first PDCCH monitoring occasion corresponds to a RACH resource that overlaps with an uplink sub-band of the first full-duplex resource or a guard band of the first full-duplex resource, including that the first PDCCH monitoring occasion corresponds to a RACH resource that partially or entirely overlaps with an uplink sub-band of the first full-duplex resource or a guard band of the first full-duplex resource.

[0220] Exemplarily, the first PDCCH corresponds to a frequency domain resource that overlaps with an uplink sub-band of the first full-duplex resource or a guard band of the first full-duplex resource, including that the first PDCCH corresponds to a frequency domain resource that partially or entirely overlaps with an uplink sub-band of the first full-duplex resource or a guard band of the first full-duplex resource.

[0221] Exemplarily, the first RACH resource is located in an uplink sub-band of the first full-duplex resource, and a frequency domain interval between the first RACH resource corresponding to the first RACH transmission and a downlink sub-band of the first full-duplex resource is less than a first preset interval, including that the first RACH resource is located in an uplink sub-band of the first full-duplex resource, and the terminal initiates the first RACH transmission at a second RACH resource of the first time unit, and a frequency domain interval between the second RACH resource and a downlink sub-band of the first full-duplex resource is less than a first preset interval.

[0222] Exemplarily, the first RACH resource corresponding to the first RACH transmission is located in a sub-band other than the uplink sub-band of the first full-duplex resource, including that the terminal initiates the first RACH transmission at a second RACH resource of the first time unit, and the second RACH resource is located in a sub-band other than the uplink sub-band of the first full-duplex resource.

[0223] Exemplarily, the first RACH resource corresponding to the first RACH transmission overlaps with a downlink sub-band of the first full-duplex resource or a guard band of the first full-duplex resource, including that the terminal initiates the first RACH transmission at a second RACH resource of the first time unit, and the second RACH resource overlaps with a downlink sub-band of the first full-duplex resource or a guard band of the first full-duplex resource.

[0224] In an example, the RACH resource corresponding to the first PDCCH monitoring occasion is located in the downlink sub-band of the first full-duplex resource, and the frequency domain interval between the RACH resource corresponding to the first PDCCH and the uplink sub-band of the first full-duplex resource is less than the second preset interval, including: the RACH resource corresponding to the first PDCCH monitoring occasion is located in the downlink sub-band of the first full-duplex resource, and the terminal monitors the first PDCCH in the second PDCCH monitoring occasion of the first time unit, and the frequency domain resource corresponding to the second PDCCH monitoring occasion has a frequency domain interval with the uplink sub-band of the first full-duplex resource, which is less than the second preset interval.

[0225] In an example, the frequency domain resource corresponding to the first PDCCH is located in a sub-band other than the downlink sub-band of the first full-duplex resource, including: the terminal monitors the first PDCCH in the second PDCCH monitoring occasion of the first time unit, and the frequency domain resource corresponding to the second PDCCH monitoring occasion is located in a sub-band other than the downlink sub-band of the first full-duplex resource.

[0226] In an example, the frequency domain resource corresponding to the first PDCCH overlaps with the uplink sub-band of the first full-duplex resource or the guard band of the first full-duplex resource, including: the terminal monitors the first PDCCH in the second PDCCH monitoring occasion of the first time unit, and the frequency domain resource corresponding to the second PDCCH monitoring occasion overlaps with the uplink sub-band of the first full-duplex resource or the guard band of the first full-duplex resource.

[0227] In an example, the first preset interval or the second preset interval can be a protocol agreed value or a value pre-configured by the network side device.

[0228] In this embodiment, when the third condition is met, it is explained that the first full-duplex resource is a full-duplex resource that does not match random access, in which case the terminal determines that the transmission mode in the first time unit is a half-duplex transmission mode, which not only ensures the random access performance, but also improves the flexibility and reduces the complexity of the full-duplex resource configuration, thereby improving the communication performance.

[0229] In addition, when the transmission mode in the first time unit is a half-duplex transmission mode, the self-interference of uplink transmission on downlink reception can also be reduced, thereby improving the random access performance.

[0230] Of course, in other alternative embodiments, the third condition can be constructed by other dimensions, which is not limited in the present application.

[0231] For example, the third condition can comprise at least one of: the information transmitted by the first RACH transmission is retransmission information; the information transmitted by the first PDCCH transmission is retransmission information.

[0232] In some embodiments, the first condition further comprises at least one of:

[0233] The first time unit is a time unit corresponding to a full-duplex resource of the network-side device.

[0234] The first time unit is a time unit of time division duplex, TDD, downlink.

[0235] The first time unit is a time unit of time division duplex, TDD, uplink.

[0236] The first time unit is a time unit of time division duplex, TDD, flexible.

[0237] Illustratively, the first time unit is a time unit corresponding to a full-duplex resource of the terminal.

[0238] Illustratively, the full-duplex resource (e.g., gNB SBFD resource) of the network-side device can be configured based on a SIB or a specific (dedicated) RRC message. The full-duplex resource configured based on the SIB can correspond to a CBRA-based random access procedure. The full-duplex resource configured based on the specific RRC message can correspond to a CFRA-based random access procedure.

[0239] Illustratively, the TDD downlink time unit, TDD uplink time unit, or TDD flexible time unit can also be referred to as a TDD resource, which can be configured based on a SIB or a specific (dedicated) RRC message. The TDD resource configured based on the SIB can correspond to a CBRA-based random access procedure. The TDD resource configured based on the specific RRC message can correspond to a CFRA-based random access procedure.

[0240] Illustratively, the first time unit is a time unit corresponding to a full-duplex resource of the network-side device, comprising: the first time unit is configured with a full-duplex resource of the network-side device, or a time domain format of the first time unit is a time unit configured with a full-duplex resource of the network-side device. The first time unit is a time unit of time division duplex, TDD, downlink, comprising: the first time unit is a configured TDD downlink time unit. The first time unit is a time unit of time division duplex, TDD, uplink, comprising: the first time unit is a configured TDD uplink time unit. The first time unit is a time unit of time division duplex, TDD, flexible, comprising: a time domain format of the first time unit is a time unit of time division duplex, TDD, flexible.

[0241] In the embodiment, the first condition is satisfied, the terminal satisfies the condition of the half duplex transmission mode, and thus the terminal determines that the communication performance can be guaranteed when the transmission mode of the terminal in the first time unit is the half duplex transmission mode.

[0242] In some embodiments, before the S210, the method 200 further includes:

[0243] The terminal receives at least one RACH configuration information from a network side device.

[0244] The at least one RACH configuration information includes at least one of the following:

[0245] The first RACH configuration information;

[0246] The second RACH configuration information;

[0247] The third RACH configuration information;

[0248] The first RACH configuration information corresponds to the RACH transmission on the full duplex resource of the network side device, the second RACH configuration information corresponds to the RACH transmission on the full duplex resource of the terminal, and the third RACH configuration information corresponds to the RACH transmission on the time division duplex (TDD) time unit.

[0249] For example, the first RACH configuration information corresponding to the RACH transmission on the full duplex resource of the network side device includes that the first RACH configuration information is used to configure the RACH transmission in the time domain format of the time unit corresponding to the full duplex resource of the network side device.

[0250] For example, the second RACH configuration information corresponding to the RACH transmission on the full duplex resource of the terminal includes that the second RACH configuration information is used to configure the RACH transmission in the time domain format of the time unit corresponding to the full duplex resource of the terminal.

[0251] For example, the third RACH configuration information corresponding to the RACH transmission on the TDD time unit includes that the third RACH configuration information is used to configure the RACH transmission in the time domain format of the TDD time unit.

[0252] For example, the TDD time unit refers to the time unit configured by the TDD configuration.

[0253] Exemplarily, the first RACH configuration information, the second RACH configuration information or the third RACH configuration information can be configured based on a SIB or a dedicated RRC message. The RACH configuration information configured based on the SIB can correspond to a CBRA-based random access procedure. The RACH configuration information configured based on the dedicated RRC message can correspond to a CFRA-based random access procedure.

[0254] Exemplarily, the terminal determines that the transmission mode on the first time unit is the half-duplex transmission mode, and initiates the RACH transmission according to the first RACH configuration information or the third RACH configuration information. For example, if the first RACH configuration information is configured, the terminal initiates the RACH transmission according to the first RACH configuration information. If the first RACH configuration information is not configured, the terminal initiates the RACH transmission according to the third RACH configuration information. Alternatively, the terminal determines that the transmission mode on the first time unit is the full-duplex transmission mode, and initiates the RACH transmission according to the second RACH configuration information or the third RACH configuration information.

[0255] In some embodiments, the first RACH resource is valid, and the judgment condition for the validity of the first RACH resource includes:

[0256] The first RACH resource does not overlap with a downlink sub-band or a guard band of the first full-duplex resource; or

[0257] The first RACH resource does not overlap with a downlink sub-band or a guard band of the full-duplex resource of the network-side device.

[0258] Exemplarily, the terminal determines that the transmission mode on the first time unit is the full-duplex transmission mode, and the first RACH resource is valid, and the judgment condition for the validity of the first RACH resource includes that the first RACH resource does not overlap with a downlink sub-band or a guard band of the first full-duplex resource.

[0259] Exemplarily, the terminal determines that the transmission mode on the first time unit is the half-duplex transmission mode, and the first RACH resource is valid, and the judgment condition for the validity of the first RACH resource includes that the first RACH resource does not overlap with a downlink sub-band or a guard band of the full-duplex resource of the network-side device.

[0260] In this embodiment, the validity of the first RACH resource is judged by the full-duplex resource, which can ensure the transmission performance of the RACH transmission.

[0261] In some embodiments, the terminal determines that the transmission mode in the first time unit is the full-duplex transmission mode, and the method 200 further includes at least one of the following:

[0262] The terminal initiates RACH transmission in the uplink sub-band of the first full-duplex resource;

[0263] The terminal monitors PDCCH in the downlink sub-band of the first full-duplex resource.

[0264] For example, the terminal determines that the transmission mode in the first time unit is the full-duplex transmission mode, and the time domain format of the first time unit is a time unit corresponding to the full-duplex resource (e.g., the first full-duplex resource) of the terminal, in which case the terminal initiates RACH transmission in the uplink sub-band of the first full-duplex resource; and / or the terminal monitors PDCCH in the downlink sub-band of the first full-duplex resource.

[0265] For example, the terminal initiates RACH transmission in the uplink sub-band of the first full-duplex resource with the largest guard band between the downlink sub-band; and / or the terminal monitors PDCCH in the downlink sub-band of the first full-duplex resource with the largest guard band between the uplink sub-band.

[0266] For example, the terminal initiates RACH transmission in the RACH resource of the first full-duplex resource with the largest interval (or an interval greater than a certain preset value) between the downlink sub-band; and / or the terminal monitors PDCCH in the PDCCH monitoring opportunity of the first full-duplex resource with the largest interval (or an interval greater than a certain preset value) between the uplink sub-band.

[0267] In this embodiment, the terminal initiates RACH transmission in the uplink sub-band of the first full-duplex resource with the largest guard band between the downlink sub-band, which can reduce the self-interference of RACH transmission on the received signal, thereby improving the communication performance. Similarly, the terminal monitors PDCCH in the downlink sub-band of the first full-duplex resource with the largest guard band between the uplink sub-band, which can reduce the self-interference of the transmitted signal on PDCCH, thereby improving the communication performance.

[0268] In some embodiments, the terminal determines that the transmission mode in the first time unit is the half-duplex transmission mode, and in the case that the first time unit is configured with the full-duplex resource of the network-side device, the method 200 further includes at least one of the following:

[0269] The terminal initiates RACH transmission in the uplink sub-band of the full-duplex resource of the network-side device;

[0270] The terminal monitors PDCCH in a downlink sub-band of the full-duplex resource of the network-side device.

[0271] Exemplarily, the terminal determines that the transmission mode in the first time unit is the half-duplex transmission mode, and in a case where the first time unit is configured with the full-duplex resource of the network-side device, the first time unit is a time unit corresponding to the full-duplex resource of the network-side device, i.e., a time domain format of the first time unit is a time unit corresponding to the full-duplex resource of the network-side device; in this case, the terminal can initiate RACH transmission in an uplink sub-band of the full-duplex resource of the network-side device; or the terminal can monitor PDCCH in a downlink sub-band of the full-duplex resource of the network-side device.

[0272] In this embodiment, the terminal determines that the transmission mode in the first time unit is the half-duplex transmission mode, and in a case where the first time unit is configured with the full-duplex resource of the network-side device, the terminal initiates RACH transmission in an uplink sub-band of the full-duplex resource of the network-side device, which can increase the frequency domain resource corresponding to RACH transmission, and thus not only can improve the resource utilization, but also can improve the transmission performance of RACH transmission. Similarly, the terminal determines that the transmission mode in the first time unit is the half-duplex transmission mode, and in a case where the first time unit is configured with the full-duplex resource of the network-side device, the terminal monitors PDCCH in a downlink sub-band of the full-duplex resource of the network-side device, which can increase the frequency domain resource corresponding to PDCCH, and thus not only can improve the resource utilization, but also can improve the transmission performance of PDCCH.

[0273] It should be noted that if the terminal determines that the full-duplex transmission mode is fallbacked to the half-duplex transmission mode in the first time unit, in this case, it can also be considered that the transmission mode in the first time unit is the half-duplex transmission mode, i.e., in a case where the first time unit is configured with the full-duplex resource of the network-side device, the terminal initiates RACH transmission in an uplink sub-band of the full-duplex resource of the network-side device; or the terminal monitors PDCCH in a downlink sub-band of the full-duplex resource of the network-side device.

[0274] In some embodiments, the terminal determines that the transmission mode in the first time unit is the half-duplex transmission mode, and in a case where the first time unit is not configured with the full-duplex resource of the network-side device, the method 200 further includes at least one of the following:

[0275] The terminal initiates RACH transmission in a frequency domain resource corresponding to a time division duplex (TDD) uplink time unit or a frequency domain resource corresponding to a TDD flexible time unit;

[0276] The terminal monitors PDCCH on the frequency domain resource corresponding to the TDD uplink time unit, the frequency domain resource corresponding to the TDD downlink time unit, or the frequency domain resource corresponding to the TDD flexible time unit.

[0277] Exemplarily, the frequency domain resource corresponding to the TDD uplink time unit, the frequency domain resource corresponding to the TDD downlink time unit, or the frequency domain resource corresponding to the TDD flexible time unit can be the frequency domain resource configured by the TDD configuration.

[0278] Exemplarily, the terminal determines that the transmission mode on the first time unit is the half-duplex transmission mode, and in a case where the full-duplex resource of the network side device is not configured on the first time unit, the time domain format of the first time unit is a TDD downlink time unit, a TDD uplink time unit, or a TDD flexible time unit. In this case, the terminal can initiate RACH transmission on the frequency domain resource corresponding to the TDD uplink time unit or the frequency domain resource corresponding to the TDD flexible time unit; or the terminal can monitor PDCCH on the frequency domain resource corresponding to the TDD downlink time unit or the frequency domain resource corresponding to the TDD flexible time unit.

[0279] In this embodiment, the terminal determines that the transmission mode on the first time unit is the half-duplex transmission mode, and in a case where the full-duplex resource of the network side device is not configured on the first time unit, the terminal initiates RACH transmission on the frequency domain resource corresponding to the TDD uplink time unit or the frequency domain resource corresponding to the TDD flexible time unit, which can increase the frequency domain resource corresponding to the RACH transmission, and thus not only can improve the resource utilization, but also can improve the transmission performance of the RACH transmission. Similarly, the terminal determines that the transmission mode on the first time unit is the half-duplex transmission mode, and in a case where the full-duplex resource of the network side device is not configured on the first time unit, the terminal monitors PDCCH on the frequency domain resource corresponding to the TDD downlink time unit or the frequency domain resource corresponding to the TDD flexible time unit, which can increase the frequency domain resource corresponding to the PDCCH, and thus not only can improve the resource utilization, but also can improve the transmission performance of the PDCCH.

[0280] It should be noted that in a case where the full-duplex resource of the terminal is configured on the first time unit, and the full-duplex resource of the network side device is not configured on the first time unit, the network side device can configure a sub-band configuration for the full-duplex resource of the terminal, and the sub-band configuration is used to configure an uplink sub-band and / or a downlink sub-band.

[0281] For example, the terminal determines that the transmission mode on the first time unit is the half-duplex transmission mode, and in the case that the full-duplex resource of the network side device is not configured on the first time unit, the network side device configures the terminal with a sub-band configuration for the first full-duplex resource, and the sub-band configuration is used to configure the uplink sub-band and / or the downlink sub-band, and the method 200 further includes at least one of the following:

[0282] The terminal initiates the RACH transmission on the uplink sub-band configured by the sub-band configuration;

[0283] The terminal monitors the PDCCH on the downlink sub-band configured by the sub-band configuration.

[0284] For example, the sub-band configuration can be similar to the configuration of the full-duplex resource of the network side device. Alternatively, the sub-band configuration can refer to the configuration of the full-duplex resource of the network side device.

[0285] For example, the terminal determines that the transmission mode on the first time unit is the half-duplex transmission mode, and in the case that the full-duplex resource of the network side device is not configured on the first time unit, the first time unit corresponds to the time unit of the full-duplex resource of the terminal, that is, the time domain format of the first time unit corresponds to the time unit of the full-duplex resource of the terminal; in this case, the network side device can configure the terminal with a sub-band configuration for the full-duplex resource of the terminal (i.e., the first full-duplex resource), and the sub-band configuration is used to configure the uplink sub-band and / or the downlink sub-band, that is, the terminal can initiate the RACH transmission on the uplink sub-band configured by the sub-band configuration; or the terminal can monitor the PDCCH on the downlink sub-band configured by the sub-band configuration.

[0286] It should be noted that if the terminal determines that the transmission mode on the first time unit is switched from the full-duplex transmission mode to the half-duplex transmission mode, in this case, it can also be considered that the transmission mode on the first time unit is the half-duplex transmission mode, that is, in the case that the full-duplex resource of the network side device is not configured on the first time unit, the terminal initiates the RACH transmission on the frequency domain resource corresponding to the TDD uplink time unit or the frequency domain resource corresponding to the TDD flexible time unit; or the terminal monitors the PDCCH on the frequency domain resource corresponding to the TDD downlink time unit or the frequency domain resource corresponding to the TDD flexible time unit.

[0287] In some embodiments, the first full-duplex resource includes the full-duplex resource of the terminal or the full-duplex resource of the network side device; wherein the full-duplex resource of the terminal is the frequency domain resource configured according to the time division duplex (TDD) time unit, and the full-duplex resource of the terminal is the frequency domain resource configured according to the full-duplex resource of the network side device.

[0288] Exemplarily, the full-duplex resource of the terminal is a frequency domain resource configured according to a time division duplex (TDD) time unit, including that the full-duplex resource of the terminal is a frequency domain resource configured on a TDD time unit, or the full-duplex resource of the terminal is a frequency domain resource configured for a TDD time unit. The TDD time unit can be a time unit configured by a TDD configuration, and the TDD time unit includes at least one of a TDD UL time unit, a TDD DL time unit, or a TDD flexible time unit.

[0289] Exemplarily, the full-duplex resource of the terminal is a frequency domain resource configured according to a full-duplex resource of a network side device, including that the full-duplex resource of the terminal is a full-duplex resource configured in the full-duplex resource of the network side device, or the full-duplex resource of the network side device includes the full-duplex resource of the terminal. For example, for a TDD time unit, the terminal is configured with the full-duplex resource of the network side device and the full-duplex resource of the terminal, and the full-duplex resource of the network side device includes the full-duplex resource of the terminal. The TDD time unit can be a time unit configured by a TDD configuration, and the TDD time unit includes at least one of a TDD UL time unit, a TDD DL time unit, or a TDD flexible time unit.

[0290] In some embodiments, before the S210, the method 200 further includes:

[0291] The terminal receives first indication information from a network side device, and the first indication information is used to indicate whether to determine the transmission mode on the first time unit as the half-duplex transmission mode or the full-duplex transmission mode according to the first condition.

[0292] Exemplarily, the first indication information is used to indicate whether to determine the transmission mode on the first time unit as the half-duplex transmission mode or the full-duplex transmission mode according to the first condition, which can be understood or replaced as: the first indication information is used to indicate whether to enable the first condition to determine the transmission mode on the first time unit as the half-duplex transmission mode or the full-duplex transmission mode.

[0293] Of course, in other alternative embodiments, the terminal can determine whether to determine the transmission mode on the first time unit as the half-duplex transmission mode or the full-duplex transmission mode according to the first condition based on the RRC state of the terminal. For example, in the case that the RRC state of the terminal is the non-connected state, the terminal determines the transmission mode on the first time unit as the half-duplex transmission mode or the full-duplex transmission mode according to the first condition. Alternatively, in the case that the RRC state of the terminal is the non-connected state, it is defaulted that the terminal determines the transmission mode on the first time unit as the half-duplex transmission mode or the full-duplex transmission mode according to the first condition.

[0294] In some embodiments, before the S210, the method 200 further includes:

[0295] The terminal receives first configuration information from a network side device, the first configuration information being used to indicate a plurality of full-duplex resources, the plurality of full-duplex resources including the first full-duplex resource, the first full-duplex resource being determined by the terminal or indicated by the network side device.

[0296] Exemplarily, the terminal receives the first configuration information from the network side device first, and then receives the indication of the first full-duplex resource from the network side device. For example, in the case that the terminal determines the transmission mode on the first time unit as the full-duplex transmission mode, based on the indication of the first full-duplex resource, the terminal can initiate RACH transmission on the uplink sub-band of the first full-duplex resource; and / or the terminal can monitor PDCCH on the downlink sub-band of the first full-duplex resource.

[0297] The scheme of the present application will be described below in combination with specific embodiments.

[0298] Embodiment 1:

[0299] For the first time unit configured with UE SBFD resources (time domain and frequency domain), if the first condition is met, the transmission mode on the first time unit is the full-duplex transmission mode.

[0300] The first condition includes at least one of the following:

[0301] The first time unit is configured with first RACH resources;

[0302] The terminal initiates first RACH transmission on the first time unit;

[0303] The first time unit is configured with first PDCCH monitoring opportunities related to RACH;

[0304] The terminal listens to a first PDCCH related to RACH in the first time unit.

[0305] Exemplarily, the first RACH resource includes an RO of 4-step random access, or an RO of 2-step random access or a PUSCH occasion (PO).

[0306] Exemplarily, the first RACH transmission can be a RACH transmission corresponding to a given (for example, indicated by a network side device) RACH procedure. Optionally, the given RACH procedure includes 4-step RACH, 2-step RACH, RACH for coverage enhancement, RACH for beam failure recovery, RACH for reduced capability (RedCap) terminal, RACH for requesting on-demand system information block (SIB), etc. Alternatively, the first RACH transmission can be a RACH transmission initiated in a given (for example, indicated by a network side device) resource. Optionally, the given resource includes a given subband, BWP, frequency point, frequency band, frequency layer, cell, etc.

[0307] Further, if the second condition is met, the transmission mode in the first time unit is full duplex transmission mode.

[0308] The second condition includes at least one of the following:

[0309] The first RACH resource includes a UE SBFD UL subband;

[0310] The first RACH resource does not overlap with a UE SBFD DL subband or a UE SBFD guard band;

[0311] The RACH resource corresponding to the first RACH transmission includes a UE SBFD UL subband;

[0312] The RACH resource corresponding to the first RACH transmission does not overlap with a UE SBFD DL subband or a UE SBFD guard band;

[0313] The frequency domain interval between the RACH resource corresponding to the first RACH transmission and the UE SBFD DL subband is greater than or equal to a first preset interval;

[0314] The frequency domain resource corresponding to the first PDCCH listening opportunity includes a UE SBFD DL subband;

[0315] The frequency domain resource corresponding to the first PDCCH monitoring opportunity does not overlap with a UE SBFD UL subband or a UE SBFD guard band.

[0316] The frequency domain resource corresponding to the first PDCCH includes a UE SBFD DL subband.

[0317] The frequency domain resource corresponding to the first PDCCH does not overlap with a UE SBFD UL subband or a UE SBFD guard band.

[0318] The frequency domain interval between the frequency domain resource corresponding to the first PDCCH and a UE SBFD UL subband is greater than or equal to a second preset interval.

[0319] Exemplarily, the first preset interval or the second preset interval can be a protocol agreed value or a value pre-configured by the network side device.

[0320] In the embodiment, in the case where the second condition is met, it is explained that the UE SBFD is a full duplex resource matched with random access, in which case the transmission mode on the first time unit is determined to be a full duplex transmission mode, which can guarantee the random access performance.

[0321] Further, the terminal is configured with a UE SBFD subband configuration 1 and a UE SBFD subband configuration 2, wherein the guard band corresponding to the UE SBFD subband configuration 1 is smaller than the guard band corresponding to the UE SBFD subband configuration 2 (the larger the guard band, the smaller the interference of uplink transmission on downlink reception), and if the transmission mode of the first time unit is a full duplex transmission mode, the behavior of the terminal can include:

[0322] Initiating RACH transmission on the UL subband corresponding to the UE SBFD configuration 2;

[0323] Monitoring RACH related PDCCH on the DL subband corresponding to the UE SBFD configuration 2.

[0324] Embodiment 2:

[0325] For a first time unit configured with UE SBFD resources (time domain and frequency domain), if a first condition is met, the transmission mode on the first time unit is a half duplex transmission mode.

[0326] The first condition includes at least one of the following:

[0327] The first time unit is configured with a first RACH resource;

[0328] The terminal initiates a first RACH transmission on the first time unit;

[0329] The first time unit is configured with a first PDCCH monitoring occasion related to RACH;

[0330] The terminal monitors the first PDCCH related to RACH in the first time unit.

[0331] Exemplarily, the first RACH resource includes RO of 4-step random access, or RO or PUSCH occasion (PO) of 2-step random access.

[0332] Exemplarily, the first RACH transmission can be a RACH transmission corresponding to a given (for example, indicated by the network side device) RACH procedure. Optionally, the given RACH procedure includes 4-step RACH, 2-step RACH, RACH for coverage enhancement, RACH for beam failure recovery, RACH for reduced capability (RedCap) terminal, RACH for requesting on-demand system information block (On-demand SIB), etc. Alternatively, the first RACH transmission can be a RACH transmission initiated in a given (for example, indicated by the network side device) resource. Optionally, the given resource includes a given subband, BWP, frequency point, frequency band, frequency layer, cell, etc.

[0333] Further, if a third condition is met, the transmission mode on the first time unit is a half-duplex transmission mode.

[0334] The third condition includes at least one of the following:

[0335] The first RACH resource includes a UE SBFD UL subband, and the frequency domain interval between the RACH resource corresponding to the first RACH transmission and the UE SBFD DL subband is less than a first preset interval;

[0336] The first RACH resource includes a subband other than the UE SBFD UL subband;

[0337] The first RACH resource overlaps with the UE SBFD DL subband or the UE SBFD guard band;

[0338] The RACH resource corresponding to the first RACH transmission includes a subband other than the UE SBFD UL subband;

[0339] The RACH resource corresponding to the first RACH transmission overlaps with the UE SBFD DL subband or the UE SBFD guard band;

[0340] The RACH resource corresponding to the first PDCCH monitoring opportunity includes a UE SBFD DL subband, and a frequency domain interval between the RACH resource corresponding to the first PDCCH and a UE SBFD UL subband is less than a second preset interval;

[0341] The RACH resource corresponding to the first PDCCH monitoring opportunity includes a subband other than a UE SBFD DL subband;

[0342] The RACH resource corresponding to the first PDCCH monitoring opportunity overlaps with a UE SBFD UL subband or a UE SBFD guard band;

[0343] The frequency domain resource corresponding to the first PDCCH includes a subband other than a UE SBFD DL subband;

[0344] The frequency domain resource corresponding to the first PDCCH overlaps with a UE SBFD UL subband or a UE SBFD guard band.

[0345] Exemplarily, the first preset interval or the second preset interval can be a protocol agreed value or a value pre-configured by the network side device.

[0346] In the embodiment, when the third condition is met, it is explained that the UE SBFD is a full duplex resource that does not match random access. In this case, the transmission mode on the first time unit is determined to be a half duplex transmission mode, which not only guarantees the random access performance, but also improves the flexibility and reduces the complexity of the full duplex resource configuration, thereby improving the communication performance.

[0347] In addition, when the transmission mode on the first time unit is a half duplex transmission mode, the self-interference of uplink transmission on downlink reception can be reduced, thereby improving the random access performance.

[0348] Further, if the transmission mode on the first time unit is a half duplex mode, the behavior of the terminal can include:

[0349] If a gNB SBFD subband is configured, then:

[0350] Initiating RACH transmission in a gNB SBFD UL subband;

[0351] Monitoring PDCCH related to RACH in a gNB SBFD DL subband.

[0352] If no gNB SBFD subband is configured, then:

[0353] Fall back to the frequency domain resource corresponding to the TDD UL time unit or the TDD flexible time unit to initiate RACH transmission;

[0354] Fall back to the frequency domain resource corresponding to the TDD DL time unit or the TDD flexible time unit to monitor the PDCCH related to RACH.

[0355] If there is no gNB SBFD subband configured, and there is a subband configuration configured for the UE SBFD resource, the subband configuration is used to configure the uplink subband and / or downlink subband for the UE SBFD resource, then:

[0356] Fall back to the uplink subband configured by the subband configuration to initiate RACH transmission;

[0357] Fall back to the downlink subband configured by the subband configuration to monitor the PDCCH related to RACH.

[0358] In this embodiment, by increasing the resources related to the random access process, not only the resource utilization rate can be improved, but also the random access performance can be improved.

[0359] Embodiment 3:

[0360] For the first time unit configured with UE SBFD resource (time domain and frequency domain), the transmission mode on the first time unit is half duplex transmission mode or full duplex transmission mode.

[0361] If the UE initiates RACH transmission in the UE SBFD UL subband, the transmission mode of the first time unit is full duplex transmission mode; if the UE initiates RACH transmission outside the UE SBFD UL subband, the transmission mode of the first time unit is half duplex transmission mode. If the first time unit is not configured with RACH resource (including inside or outside the UE SBFD UL subband), the UE determines the transmission mode of the first time unit according to the network indication or the preset rule.

[0362] If the UE monitors the PDCCH related to RACH in the UE SBFD DL subband, the transmission mode of the first time unit is full duplex transmission mode; otherwise, if the UE monitors the PDCCH related to RACH outside the UE SBFD DL subband, the transmission mode of the first time unit is half duplex transmission mode. If the first time unit is not configured with the monitoring opportunity of the PDCCH related to RACH (including inside or outside the UE SBFD DL subband), the UE determines the transmission mode of the first time unit according to the network indication or the preset rule.

[0363] If the frequency domain spacing between the UE SBFD UL subband and the UE SBFD DL subband is greater than or equal to M1, the transmission mode of the first time unit is full duplex transmission mode. M1 is network configured or predefined. If the frequency domain spacing is less than M1, the transmission mode of the first time unit is half duplex transmission mode.

[0364] If the frequency domain spacing between the UE SBFD UL subband and the UE SBFD DL subband is greater than or equal to M1, the transmission mode of the first time unit is full duplex transmission mode. M1 is network configured or predefined. If the frequency domain spacing is less than M1, the transmission mode of the first time unit is half duplex transmission mode.

[0365] It should be noted that for the above embodiments 1-3, for the first time unit configured with UE SBFD subband (including UE SBFD DL subband and / or UE SBFD UL subband), the RACH transmission has the following modes:

[0366] Mode 1:

[0367] If the UE adopts full duplex transmission mode, then:

[0368] initiate RACH transmission in the RACH resource within the UE SBFD UL subband; and / or

[0369] monitor the RACH related PDCCH in the PDCCH monitoring occasion within the UE SBFD DL subband.

[0370] Mode 2:

[0371] If the UE adopts half duplex transmission mode, if configured with gNB SBFD subband, then:

[0372] initiate RACH transmission in the gNB SBFD UL subband;

[0373] monitor the RACH related PDCCH in the gNB SBFD DL subband.

[0374] If the UE adopts half duplex transmission mode, if not configured with gNB SBFD subband, then:

[0375] fallback to the frequency domain resource corresponding to the TDD UL time unit or TDD flexible time unit to initiate RACH transmission;

[0376] fallback to the frequency domain resource corresponding to the TDD DL time unit or TDD flexible time unit to monitor the RACH related PDCCH.

[0377] Of course, in other alternative embodiments, which transmission mode the UE adopts can be determined according to preset rules or network indication, which is not specifically limited in the present application.

[0378] Further, for the RACH resource on the first time unit configured with the UE SBFD subband, the validity checking mode can be as follows:

[0379] Mode 1:

[0380] The validity is determined according to the gNB SBFD subband, that is, the RACH resource within the gNB SBFD UL subband is valid. In other words, the RACH resource overlapping (including partial overlap or full overlap) with the gNB SBFD DL subband or the gNB SBFD guard band is invalid.

[0381] Mode 2:

[0382] The validity is determined according to the TDD configuration, that is, the RACH resource within the UL time unit or the flexible time unit is valid. In other words, the RACH resource overlapping (including partial overlap or full overlap) with the DL time unit is invalid. Optionally, if no gNB SBFD subband is configured, the validity can be determined according to the TDD configuration.

[0383] For the time unit configured with the UE SBFD subband, the configuration mode of the RACH resource can be as follows:

[0384] Mode 1:

[0385] One RACH configuration information is configured, and the RACH resource corresponding to the RACH configuration information is valid within the gNB SBFD UL subband.

[0386] Mode 2:

[0387] Multiple RACH configuration information is configured, for example, the RACH resource corresponding to RACH configuration information 1 is valid within the UE SBFD UL subband, and the RACH resource corresponding to RACH configuration information 2 is valid within the gNB SBFD UL subband. Optionally, the RACH resources corresponding to different RACH configuration information do not overlap at least in the time domain or the frequency domain. Optionally, if a certain resource corresponding to RACH configuration information 1 and a certain resource corresponding to RACH configuration information 2 overlap in the time domain and the frequency domain, the overlapping resource corresponding to RACH configuration information 1 is invalid or the overlapping resource corresponding to RACH configuration information 2 is invalid.

[0388] Embodiment 4:

[0389] For the first time unit configured with UE SBFD resource (time domain and frequency domain), according to whether the UE SBFD resource is configured with RACH transmission related resource (such as RACH resource or PDCCH monitoring opportunity related to RACH), it is determined that the transmission mode on the first time unit is half duplex transmission mode.

[0390] Exemplarily, if the UE SBFD resource is configured with RACH resource, such as RO, the transmission mode on the first time unit is half duplex transmission mode, and the transmission direction is UL. If the UE SBFD resource is configured with PDCCH monitoring opportunity related to RACH, the transmission mode on the first time unit is half duplex transmission mode, and the transmission direction is DL.

[0391] In this embodiment, for the first time unit configured with UE SBFD resource (time domain and frequency domain), according to whether the UE SBFD resource is configured with RACH transmission related resource, it is determined that the transmission mode on the first time unit is full duplex transmission mode or half duplex transmission mode, which can maximize the performance of RACH related transmission (including uplink or downlink), while avoiding interference to downlink reception in the process of RACH transmission.

[0392] Embodiment 5:

[0393] For the first time unit configured with UE SBFD resource (time domain and frequency domain), according to whether the UE SBFD resource transmits or receives RACH related transmission (such as initiating RACH transmission or monitoring PDCCH related to RACH), it is determined that the transmission mode on the first time unit is half duplex transmission mode.

[0394] Exemplarily, if the UE SBFD resource is configured with RACH resource, such as RO, and the UE initiates RACH transmission on the RO, the transmission mode on the first time unit is half duplex transmission mode, and the transmission direction is UL. If the UE SBFD resource is configured with PDCCH monitoring opportunity related to RACH, and the UE monitors PDCCH related to RACH on the PDCCH monitoring opportunity, the transmission mode on the first time unit is half duplex transmission mode, and the transmission direction is DL.

[0395] In this embodiment, for the first time unit configured with UE SBFD resource (time domain and frequency domain), according to whether the UE SBFD resource transmits or receives RACH related transmission, it is determined that the transmission mode on the first time unit is full duplex transmission mode or half duplex transmission mode, which can maximize the performance of RACH related transmission (including uplink or downlink), while avoiding interference to downlink reception in the process of RACH transmission.

[0396] Embodiment 6:

[0397] For the first time unit, the network side device configures the UE with the UE SBFD resource, the RACH resource and the gNB SBFD resource (the size of the gNB SBFD subband is greater than or equal to the size of the UE SBFD subband, for example, the gNB SBFD subband can include the UE SBFD subband). If the transmission mode on the first time unit is a half-duplex transmission mode, then:

[0398] When the UE performs RACH-related transmission (such as initiating RACH transmission or monitoring PDCCH related to RACH) in the first time unit, the UE can use the RO resource in the gNB SBFD UL subband for UL transmission, or use the resource in the gNB SBFD DL subband for DL reception.

[0399] In this embodiment, for the first time unit configured with the UE SBFD resource (time domain and frequency domain), the UE performs RACH-related transmission based on the half-duplex transmission mode by switching to the resource of the gNB SBFD subband, which can reduce the self-interference of uplink transmission on downlink reception, thereby ensuring the performance of RACH-related transmission, and on the other hand, using the gNB SBFD subband resource for transmission can improve the utilization rate of resources.

[0400] Embodiment 7:

[0401] For the first time unit, the network side device configures the UE with the UE SBFD resource, the RACH resource and the gNB SBFD resource (the size of the gNB SBFD subband is greater than or equal to the size of the UE SBFD subband, for example, the gNB SBFD subband can include the UE SBFD subband). If the transmission mode on the first time unit is a half-duplex transmission mode, then:

[0402] If the UE does not perform RACH transmission in the first time unit, the transmission mode on the first time unit can be a half-duplex transmission mode, and the transmission direction is DL, and the UE can perform downlink reception in the gNB SBFD DL subband. If the UE performs RACH transmission in the first time unit, the transmission mode on the first time unit can be a half-duplex transmission mode, and the transmission direction is UL, and the UE can perform uplink transmission in the gNB SBFD UL subband, which includes PUCCH / PUSCH / SRS / PRACH and other transmissions.

[0403] If the UE does not perform PDCCH monitoring related to RACH in the first time unit, the transmission mode in the first time unit can be a half duplex transmission mode, and the transmission direction is UL, and the UE can perform uplink transmission in the gNB SBFD UL subband. If the UE performs PDCCH monitoring related to RACH in the first time unit, the transmission mode in the first time unit can be a half duplex transmission mode, and the transmission direction is DL, and the UE can perform downlink reception in the gNB SBFD DL subband, including PDCCH / PDSCH / CSI-RS and other receptions.

[0404] In this embodiment, for the first time unit configured with UE SBFD resources (time domain and frequency domain), the UE performs RACH-related transmission based on the half duplex transmission mode by switching to the resources of the gNB SBFD subband. On the one hand, it can reduce the self-interference of uplink transmission on downlink reception, thereby ensuring the performance of RACH-related transmission. On the other hand, using gNB SBFD subband resources for transmission can improve the utilization of resources.

[0405] Embodiment 8:

[0406] For the first time unit configured with UE SBFD resources (time domain and frequency domain), it is determined that the transmission mode in the first time unit is a full duplex transmission mode according to whether the UE SBFD resources are configured with RACH transmission related resources (such as RACH resources or RACH related PDCCH monitoring opportunities).

[0407] Exemplarily, if the UE SBFD resources are configured with RACH resources, such as RO or RACH related PDCCH monitoring opportunities, the transmission mode in the first time unit is a full duplex transmission mode. The resources used by the UE to initiate the RACH procedure are resources within the UE SBFD subband.

[0408] In this embodiment, the UE performs RACH-related transmission by full duplex transmission mode, which guarantees the performance of RACH-related transmission, simultaneously performs DL reception and UL transmission, and can improve the utilization of resources.

[0409] Embodiment 9:

[0410] For the first time unit configured with UE SBFD resources (time domain and frequency domain), it is determined that the transmission mode in the first time unit is a full duplex transmission mode according to whether the UE SBFD resources transmit or receive RACH-related transmission (such as initiating RACH transmission or monitoring PDCCH related to RACH).

[0411] Exemplarily, if the UE SBFD resource is configured with RACH resource, for example, RO, and the UE initiates RACH transmission at the RO, the transmission mode on the first time unit is full-duplex transmission mode. If the UE SBFD resource is configured with PDCCH monitoring opportunity related to RACH, and the UE monitors PDCCH related to RACH at the PDCCH monitoring opportunity, the transmission mode on the first time unit is full-duplex transmission mode.

[0412] In this embodiment, the UE performs RACH related transmission through full-duplex transmission mode, guarantees the performance of RACH related transmission, and simultaneously performs DL reception and UL transmission, which can improve resource utilization.

[0413] Embodiment 10:

[0414] The network side device can configure UE SBFD resource corresponding to the TDD configuration, and the configured UE SBFD resource has the following two cases:

[0415] Case 1:

[0416] The UE SBFD resource is configured on the TDD time unit corresponding to the TDD configuration, that is, the UE SBFD sub-band is configured on the TDD time unit. The TDD time unit can be a time unit configured by the TDD configuration, and the TDD time unit includes at least one of the following: TDD UL time unit, TDD DL time unit or TDD flexible time unit.

[0417] Case 2:

[0418] The gNB SBFD resource is configured on the TDD time unit corresponding to the TDD configuration, that is, the gNB SBFD sub-band is configured on the TDD time unit. The TDD time unit can be a time unit configured by the TDD configuration, and the TDD time unit includes at least one of the following: TDD UL time unit, TDD DL time unit or TDD flexible time unit. Then, the UE SBFD resource is configured based on the gNB SBFD resource, that is, which resources in the gNB SBFD resource are configured as UE SBFD sub-band. Optionally, the gNB SBFD sub-band has a larger bandwidth than the UE SBFD sub-band.

[0419] In this embodiment, for case 1, the UE SBFD resource can be configured without relying on the configuration of the gNB SBFD, which can improve the flexibility of resource configuration. For case 2, when the UE SBFD resource switches to half-duplex mode, the UE can perform RACH related transmission based on half-duplex transmission mode based on the gNB SBFD resource, which can further improve the utilization of resources.

[0420] Embodiment 11

[0421] For the first time unit, the network side device configures the UE with the UE SBFD resource, the RACH resource and the gNB SBFD resource (the size of the gNB SBFD subband is greater than or equal to the size of the UE SBFD subband, for example, the gNB SBFD subband can include the UE SBFD subband). If the transmission mode on the first time unit is a half-duplex transmission mode, the effectiveness of the RACH resource can be determined in the following manner:

[0422] Manner 1

[0423] On the first time unit, the effectiveness of the RACH resource is determined according to the gNB SBFD subband.

[0424] For example, when a RO is within the gNB SBFD UL subband, the RO is effective.

[0425] Manner 2

[0426] On the first time unit, the effectiveness of the RACH resource is determined according to the UE SBFD subband.

[0427] For example, the network side device can configure the terminal with multiple RACH configuration information, for example, the RACH resource corresponding to the RACH configuration information 1 is configured for the gNB SBFD subband, and the effectiveness of the RACH resource corresponding to the RACH configuration information 1 can be determined according to the gNB SBFD subband. The RACH resource corresponding to the RACH configuration information 2 is configured for the UE SBFD subband, and the effectiveness of the RACH resource corresponding to the RACH configuration information 2 can be determined according to the UE SBFD subband. For example, the RACH resource not within the UE SBFD UL subband is invalid.

[0428] In this embodiment, in the case of configuring the SBFD resource, the UE can determine the effectiveness of the RACH resource according to the gNB SBFD subband or the UE SBFD subband, which increases the transmission performance of the RACH resource, and further improves the resource utilization.

[0429] Embodiment 12

[0430] For the first time unit configured with the UE SBFD resource (time domain and frequency domain), the transmission mode on the first time unit can be determined to be a full-duplex transmission mode or a half-duplex transmission mode according to the number of random access messages (initiating RACH transmission or monitoring PDCCH related to RACH) or the type of transmitted messages.

[0431] Exemplarily, when the terminal transmits or receives the random access message for the Mth time on the first time unit, if M>1, the transmission mode on the first time unit is a half-duplex transmission mode, and if M=1, the transmission mode on the first time unit is a full-duplex transmission mode. M represents the number of transmissions of the random access message. M is configured by the network or defined by the protocol. M greater than 1 represents retransmission. Further, if the transmission mode on the first time unit is a half-duplex transmission mode, the UE can initiate RACH transmission using the RO within the gNB SBFD UL subband when initiating RACH transmission on the first time unit; if the transmission mode on the first time unit is a full-duplex transmission mode, the UE can initiate RACH transmission using the RO within the UE SBFD UL subband when initiating RACH transmission on the first time unit.

[0432] In this embodiment, when the UE retransmits RACH on the first time unit configured with SBFD resources, the performance of RACH transmission can be ensured by switching to a half-duplex transmission mode, while avoiding self-interference of uplink transmission on downlink reception.

[0433] FIG. 7 is a schematic flowchart of a transmission mode determination method 300 according to an embodiment of the present application.

[0434] As shown in FIG. 7, the transmission mode determination method 300 can include at least part of the following contents:

[0435] S310, for a first time unit corresponding to a first full-duplex resource, in a case where a first condition is met, a network-side device determines that a transmission mode on the first time unit is a half-duplex transmission mode or a full-duplex transmission mode;

[0436] The first condition includes at least one of the following:

[0437] The first time unit is configured with a first random access channel (RACH) resource;

[0438] The network-side device receives a first random access channel (RACH) transmission on the first time unit;

[0439] The first time unit is configured with a first physical downlink control channel (PDCCH) monitoring opportunity related to a random access channel (RACH);

[0440] The network-side device transmits a first physical downlink control channel (PDCCH) related to a random access channel (RACH) on the first time unit.

[0441] In some embodiments, the S310 includes:

[0442] In a case where the second condition is met, the network-side device determines that the transmission mode in the first time unit is the full-duplex mode:

[0443] The second condition further includes at least one of the following:

[0444] The first RACH resource is located in the uplink sub-band of the first full-duplex resource.

[0445] The first RACH resource does not overlap with the downlink sub-band of the first full-duplex resource or the guard band of the first full-duplex resource.

[0446] The RACH resource corresponding to the first RACH transmission is located in the uplink sub-band of the first full-duplex resource.

[0447] The RACH resource corresponding to the first RACH transmission does not overlap with the downlink sub-band of the first full-duplex resource or the guard band of the first full-duplex resource.

[0448] The frequency domain interval between the RACH resource corresponding to the first RACH transmission and the downlink sub-band of the first full-duplex resource is greater than or equal to a first preset interval.

[0449] The frequency domain resource corresponding to the first PDCCH monitoring opportunity is located in the downlink sub-band of the first full-duplex resource.

[0450] The frequency domain resource corresponding to the first PDCCH monitoring opportunity does not overlap with the uplink sub-band of the first full-duplex resource or the guard band of the first full-duplex resource.

[0451] The frequency domain resource corresponding to the first PDCCH is located in the downlink sub-band of the first full-duplex resource.

[0452] The frequency domain resource corresponding to the first PDCCH does not overlap with the uplink sub-band of the first full-duplex resource or the guard band of the first full-duplex resource.

[0453] The frequency domain interval between the frequency domain resource corresponding to the first PDCCH and the uplink sub-band of the first full-duplex resource is greater than or equal to a second preset interval.

[0454] In some embodiments, the S310 includes:

[0455] In a case where the third condition is met, the network-side device determines that the transmission mode in the first time unit is the half-duplex transmission mode:

[0456] The third condition further includes at least one of the following:

[0457] The first RACH resource is located in an uplink sub-band of the first full-duplex resource, and a frequency domain interval between the RACH resource corresponding to the first RACH transmission and a downlink sub-band of the first full-duplex resource is less than a first preset interval.

[0458] The first RACH resource is located in a sub-band other than the uplink sub-band of the first full-duplex resource.

[0459] The first RACH resource overlaps with a downlink sub-band of the first full-duplex resource or a guard band of the first full-duplex resource.

[0460] The RACH resource corresponding to the first RACH transmission is located in a sub-band other than the uplink sub-band of the first full-duplex resource.

[0461] The RACH resource corresponding to the first RACH transmission overlaps with a downlink sub-band of the first full-duplex resource or a guard band of the first full-duplex resource.

[0462] The RACH resource corresponding to the first PDCCH monitoring opportunity is located in a downlink sub-band of the first full-duplex resource, and a frequency domain interval between the RACH resource corresponding to the first PDCCH and an uplink sub-band of the first full-duplex resource is less than a second preset interval.

[0463] The RACH resource corresponding to the first PDCCH monitoring opportunity is located in a sub-band other than the downlink sub-band of the first full-duplex resource.

[0464] The RACH resource corresponding to the first PDCCH monitoring opportunity overlaps with an uplink sub-band of the first full-duplex resource or a guard band of the first full-duplex resource.

[0465] The frequency domain resource corresponding to the first PDCCH is located in a sub-band other than the downlink sub-band of the first full-duplex resource.

[0466] The frequency domain resource corresponding to the first PDCCH overlaps with an uplink sub-band of the first full-duplex resource or a guard band of the first full-duplex resource.

[0467] In some embodiments, the first condition further includes at least one of the following:

[0468] The first time unit is a time unit corresponding to a full-duplex resource of a network side device.

[0469] The first time unit is a time division duplex, TDD, downlink time unit.

[0470] The first time unit is a time division duplex, TDD, uplink time unit.

[0471] The first time unit is a time division duplex (TDD) flexible time unit.

[0472] In some embodiments, before the S310, the method 300 further includes:

[0473] The network-side device sends at least one RACH configuration information to the terminal.

[0474] The at least one RACH configuration information includes at least one of the following:

[0475] First RACH configuration information;

[0476] Second RACH configuration information;

[0477] Third RACH configuration information;

[0478] The first RACH configuration information corresponds to RACH transmission on full duplex resources of the network-side device, the second RACH configuration information corresponds to RACH transmission on full duplex resources of the terminal, and the third RACH configuration information corresponds to RACH transmission on a time division duplex (TDD) time unit.

[0479] In some embodiments, the first RACH resource is valid, and the judgment condition that the first RACH resource is valid includes:

[0480] The first RACH resource does not overlap with a downlink sub-band or a guard band of the first full duplex resource; or

[0481] The first RACH resource does not overlap with a downlink sub-band or a guard band of full duplex resources of the network-side device.

[0482] In some embodiments, the network-side device determines that the transmission mode on the first time unit is the full duplex transmission mode, and the method 300 further includes at least one of the following:

[0483] The network-side device receives RACH transmission on an uplink sub-band of the first full duplex resource;

[0484] The network-side device sends PDCCH on a downlink sub-band of the first full duplex resource.

[0485] In some embodiments, the network-side device determines that the transmission mode on the first time unit is the half duplex transmission mode, and in the case that the first time unit is configured with full duplex resources of the network-side device, the method 300 further includes at least one of the following:

[0486] The network-side device receives RACH transmission on an uplink sub-band of the full duplex resources of the network-side device;

[0487] The network-side device transmits the PDCCH on a downlink sub-band of the full-duplex resource of the network-side device.

[0488] In some embodiments, the network-side device determines the transmission mode on the first time unit to be the half-duplex transmission mode, and in a case where the full-duplex resource of the network-side device is not configured on the first time unit, the method 300 further includes at least one of the following:

[0489] The network-side device receives the RACH transmission on a frequency domain resource corresponding to a time division duplex (TDD) uplink time unit or a TDD flexible time unit.

[0490] The network-side device transmits the PDCCH on a time division duplex (TDD) downlink time unit or a TDD flexible time unit.

[0491] In some embodiments, the first full-duplex resource includes a full-duplex resource of a terminal or a full-duplex resource of the network-side device; wherein the full-duplex resource of the terminal is a frequency domain resource configured according to a time division duplex (TDD) time unit, and the full-duplex resource of the network-side device is a frequency domain resource configured according to the full-duplex resource of the network-side device.

[0492] In some embodiments, before the S310, the method 300 further includes:

[0493] The network-side device transmits first indication information to the terminal, the first indication information being used to indicate whether the transmission mode on the first time unit is determined to be the half-duplex transmission mode or the full-duplex transmission mode according to the first condition.

[0494] In some embodiments, before the S310, the method 300 further includes:

[0495] The network-side device transmits first configuration information to the terminal, the first configuration information being used to indicate a plurality of full-duplex resources, the plurality of full-duplex resources including the first full-duplex resource, and the first full-duplex resource being determined by the terminal or indicated by the network-side device.

[0496] It should be understood that the transmission mode determination method 300 is a related process for the network-side device to determine the transmission mode, and the terms and method 200 involved are similar, and therefore the specific content can be referred to the related description in the method 200. To avoid repetition, it will not be described here.

[0497] The transmission mode determination method provided in the embodiments of the present application can be executed by a transmission mode determination apparatus. In the embodiments of the present application, the transmission mode determination apparatus is taken as an example to execute the transmission mode determination method, and the transmission mode determination apparatus provided in the embodiments of the present application is described.

[0498] Embodiments of the present application provide a transmission mode determination apparatus, which can be a communication device or a component in a communication device, such as a chip, as an example. The communication device can be a terminal, a network side device, a server, or the like. For example, the terminal can include, but is not limited to, the types of terminal 11 listed above, the network side device can include, but is not limited to, the types of network side device 12 listed above, and embodiments of the present application are not limited specifically.

[0499] The transmission mode determination apparatus includes a receiving module, a sending module, and a processing module. The receiving module, the sending module, and the processing module can be implemented by software or by hardware. When implemented by hardware, the processing module can be implemented by a processor, which can include a general purpose processor, a special purpose processor, or the like, such as a central processing unit (CPU), a microprocessor, a digital signal processor (DSP), an artificial intelligent (AI) processor, a graphics processing unit (GPU), an application specific integrated circuit (ASIC), a network processor (NP), a field programmable gate array (FPGA), or other programmable logic devices, a gate circuit, a transistor, a discrete hardware component, or the like. The receiving module and the sending module can be implemented by a communication interface, which can include one or more of a transceiver, a pin, a circuit, a bus, a radio frequency unit, or the like.

[0500] Specifically, referring to FIG. 8, when the transmission mode determination apparatus is a terminal or a component in a terminal, the transmission mode determination apparatus 400 includes a processing module 410, configured to:

[0501] For a first time unit corresponding to a first full duplex resource, in a case where a first condition is met, determine that a transmission mode on the first time unit is a half duplex transmission mode or a full duplex transmission mode.

[0502] The first condition includes at least one of the following:

[0503] The first time unit is configured with a first random access channel (RACH) resource.

[0504] The terminal initiates a first random access channel (RACH) transmission in the first time unit.

[0505] The first time unit is configured with a first physical downlink control channel (PDCCH) monitoring opportunity related to a random access channel (RACH);

[0506] The terminal monitors a first physical downlink control channel (PDCCH) related to a random access channel (RACH) in the first time unit.

[0507] In some embodiments, the processing module 410 is specifically configured to:

[0508] In a case where a second condition is met, determining that a transmission mode on the first time unit is the full-duplex mode:

[0509] The second condition further includes at least one of the following:

[0510] The first RACH resource is located in an uplink sub-band of the first full-duplex resource;

[0511] The first RACH resource does not overlap with a downlink sub-band of the first full-duplex resource or a guard band of the first full-duplex resource;

[0512] The RACH resource corresponding to the first RACH transmission is located in an uplink sub-band of the first full-duplex resource;

[0513] The RACH resource corresponding to the first RACH transmission does not overlap with a downlink sub-band of the first full-duplex resource or a guard band of the first full-duplex resource;

[0514] A frequency domain interval between the RACH resource corresponding to the first RACH transmission and the downlink sub-band of the first full-duplex resource is greater than or equal to a first preset interval;

[0515] The frequency domain resource corresponding to the first PDCCH monitoring opportunity is located in a downlink sub-band of the first full-duplex resource;

[0516] The frequency domain resource corresponding to the first PDCCH monitoring opportunity does not overlap with an uplink sub-band of the first full-duplex resource or a guard band of the first full-duplex resource;

[0517] The frequency domain resource corresponding to the first PDCCH is located in a downlink sub-band of the first full-duplex resource;

[0518] The frequency domain resource corresponding to the first PDCCH does not overlap with an uplink sub-band of the first full-duplex resource or a guard band of the first full-duplex resource;

[0519] A frequency domain interval between the frequency domain resource corresponding to the first PDCCH and the uplink sub-band of the first full-duplex resource is greater than or equal to a second preset interval.

[0520] In some embodiments, the processing module 410 is specifically configured to:

[0521] In the case where the third condition is met, the transmission mode on the first time unit is determined as the half-duplex transmission mode:

[0522] The third condition further includes at least one of the following:

[0523] The first RACH resource is located in the uplink sub-band of the first full-duplex resource, and the frequency domain interval between the RACH resource corresponding to the first RACH transmission and the downlink sub-band of the first full-duplex resource is less than a first preset interval;

[0524] The first RACH resource is located in a sub-band other than the uplink sub-band of the first full-duplex resource;

[0525] The first RACH resource overlaps with the downlink sub-band of the first full-duplex resource or the guard band of the first full-duplex resource;

[0526] The RACH resource corresponding to the first RACH transmission is located in a sub-band other than the uplink sub-band of the first full-duplex resource;

[0527] The RACH resource corresponding to the first RACH transmission overlaps with the downlink sub-band of the first full-duplex resource or the guard band of the first full-duplex resource;

[0528] The RACH resource corresponding to the first PDCCH monitoring opportunity is located in the downlink sub-band of the first full-duplex resource, and the frequency domain interval between the RACH resource corresponding to the first PDCCH and the uplink sub-band of the first full-duplex resource is less than a second preset interval;

[0529] The RACH resource corresponding to the first PDCCH monitoring opportunity is located in a sub-band other than the downlink sub-band of the first full-duplex resource;

[0530] The RACH resource corresponding to the first PDCCH monitoring opportunity overlaps with the uplink sub-band of the first full-duplex resource or the guard band of the first full-duplex resource;

[0531] The frequency domain resource corresponding to the first PDCCH is located in a sub-band other than the downlink sub-band of the first full-duplex resource;

[0532] The frequency domain resource corresponding to the first PDCCH overlaps with the uplink sub-band of the first full-duplex resource or the guard band of the first full-duplex resource.

[0533] In some embodiments, the first condition further includes at least one of the following:

[0534] The first time unit is a time unit corresponding to a full-duplex resource of the network-side device.

[0535] The first time unit is a time division duplex (TDD) downlink time unit.

[0536] The first time unit is a time division duplex (TDD) uplink time unit.

[0537] The first time unit is a time division duplex (TDD) flexible time unit.

[0538] In some embodiments, the apparatus 400 further includes a first receiving module, and before the processing module 410 determines that the transmission mode on the first time unit is a half-duplex transmission mode or a full-duplex transmission mode, the first receiving module is configured to:

[0539] receive at least one RACH configuration information from a network-side device;

[0540] The at least one RACH configuration information includes at least one of the following:

[0541] first RACH configuration information;

[0542] second RACH configuration information;

[0543] third RACH configuration information;

[0544] The first RACH configuration information corresponds to RACH transmission on a full-duplex resource of a network-side device, the second RACH configuration information corresponds to RACH transmission on a full-duplex resource of the terminal, and the third RACH configuration information corresponds to RACH transmission on a time division duplex (TDD) time unit.

[0545] In some embodiments, the first RACH resource is valid, and the judgment condition for the validity of the first RACH resource includes:

[0546] The first RACH resource does not overlap with a downlink sub-band or a guard band of the first full-duplex resource; or

[0547] The first RACH resource does not overlap with a downlink sub-band or a guard band of a full-duplex resource of a network-side device.

[0548] In some embodiments, the apparatus 400 further includes a first communication module, and before the processing module 410 determines that the transmission mode on the first time unit is the full-duplex transmission mode, the first communication module is configured to perform at least one of the following:

[0549] initiate RACH transmission on an uplink sub-band of the first full-duplex resource;

[0550] monitor PDCCH in a downlink sub-band of the first full-duplex resource.

[0551] In some embodiments, the apparatus 400 further includes a second communication module, and the processing module 410 determines that the transmission mode in the first time unit is the half-duplex transmission mode, and in a case where the full-duplex resource of the network side device is configured in the first time unit, the second communication module is configured to perform at least one of the following:

[0552] initiating RACH transmission in an uplink sub-band of the full-duplex resource of the network side device;

[0553] monitoring PDCCH in a downlink sub-band of the full-duplex resource of the network side device.

[0554] In some embodiments, the apparatus 400 further includes a third communication module, and the processing module 410 determines that the transmission mode in the first time unit is the half-duplex transmission mode, and in a case where the full-duplex resource of the network side device is not configured in the first time unit, the third communication module is configured to perform at least one of the following:

[0555] initiating RACH transmission in a frequency domain resource corresponding to a time division duplex (TDD) uplink time unit or a frequency domain resource corresponding to a TDD flexible time unit;

[0556] monitoring PDCCH in a frequency domain resource corresponding to a TDD downlink time unit or a frequency domain resource corresponding to a TDD flexible time unit.

[0557] In some embodiments, the first full-duplex resource includes a full-duplex resource of the terminal or a full-duplex resource of the network side device; wherein the full-duplex resource of the terminal is a frequency domain resource configured according to a time division duplex (TDD) time unit, and the full-duplex resource of the terminal is a frequency domain resource configured according to the full-duplex resource of the network side device.

[0558] In some embodiments, the apparatus 400 further includes a second receiving module, and before the processing module 410 determines that the transmission mode in the first time unit is the half-duplex transmission mode or the full-duplex transmission mode, the second receiving module is configured to:

[0559] receive first indication information from the network side device, the first indication information being used to indicate whether to determine the transmission mode in the first time unit as the half-duplex transmission mode or the full-duplex transmission mode according to the first condition.

[0560] In some embodiments, the apparatus 400 further includes a third receiving module, and before the processing module 410 determines that the transmission mode in the first time unit is the half-duplex transmission mode or the full-duplex transmission mode, the third receiving module is configured to:

[0561] receive first configuration information from a network-side device, the first configuration information being used for indicating a plurality of full-duplex resources, the plurality of full-duplex resources including the first full-duplex resource, the first full-duplex resource being determined by the terminal or indicated by the network-side device.

[0562] The apparatus provided by the embodiments of the present application can realize each process of the method embodiment of FIG. 6 and achieve the same technical effects. To avoid repetition, details are not described herein.

[0563] Referring to FIG. 9, when the transmission mode determination apparatus is a network-side device or a component in the network-side device, the transmission mode determination apparatus 500 includes a processing module 510, configured to:

[0564] For a first time unit corresponding to the first full-duplex resource, in a case where a first condition is met, determine that a transmission mode on the first time unit is a half-duplex transmission mode or a full-duplex transmission mode.

[0565] The first condition includes at least one of the following:

[0566] The first time unit is configured with a first random access channel (RACH) resource;

[0567] The network-side device receives a first random access channel (RACH) transmission on the first time unit;

[0568] The first time unit is configured with a first physical downlink control channel (PDCCH) monitoring opportunity related to a random access channel (RACH);

[0569] The network-side device sends a first physical downlink control channel (PDCCH) related to a random access channel (RACH) on the first time unit.

[0570] In some embodiments, the processing module 510 is specifically configured to:

[0571] In a case where a second condition is met, determine that the transmission mode on the first time unit is the full-duplex mode:

[0572] The second condition further includes at least one of the following:

[0573] The first RACH resource is located in an uplink sub-band of the first full-duplex resource;

[0574] The first RACH resource does not overlap with a downlink sub-band of the first full-duplex resource or a guard band of the first full-duplex resource;

[0575] The RACH resource corresponding to the first RACH transmission is located in an uplink sub-band of the first full-duplex resource.

[0576] the RACH resource corresponding to the first RACH transmission does not overlap with the downlink sub-band of the first full-duplex resource or the guard band of the first full-duplex resource;

[0577] a frequency domain interval between the RACH resource corresponding to the first RACH transmission and the downlink sub-band of the first full-duplex resource is greater than or equal to a first preset interval;

[0578] the frequency domain resource corresponding to the first PDCCH monitoring opportunity is located in the downlink sub-band of the first full-duplex resource;

[0579] the frequency domain resource corresponding to the first PDCCH monitoring opportunity does not overlap with the uplink sub-band of the first full-duplex resource or the guard band of the first full-duplex resource;

[0580] the frequency domain resource corresponding to the first PDCCH is located in the downlink sub-band of the first full-duplex resource;

[0581] the frequency domain resource corresponding to the first PDCCH does not overlap with the uplink sub-band of the first full-duplex resource or the guard band of the first full-duplex resource;

[0582] a frequency domain interval between the frequency domain resource corresponding to the first PDCCH and the uplink sub-band of the first full-duplex resource is greater than or equal to a second preset interval.

[0583] In some embodiments, the processing module 510 is specifically configured to:

[0584] determine, in a case where a third condition is met, that the transmission mode on the first time unit is the half-duplex transmission mode:

[0585] wherein the third condition further includes at least one of the following:

[0586] the first RACH resource is located in the uplink sub-band of the first full-duplex resource, and a frequency domain interval between the RACH resource corresponding to the first RACH transmission and the downlink sub-band of the first full-duplex resource is less than a first preset interval;

[0587] the first RACH resource is located in a sub-band other than the uplink sub-band of the first full-duplex resource;

[0588] the first RACH resource overlaps with the downlink sub-band of the first full-duplex resource or the guard band of the first full-duplex resource;

[0589] the RACH resource corresponding to the first RACH transmission is located in a sub-band other than the uplink sub-band of the first full-duplex resource;

[0590] The RACH resource corresponding to the first PDCCH monitoring opportunity is located in a subband other than the downlink subband of the first full-duplex resource;

[0591] The RACH resource corresponding to the first PDCCH monitoring opportunity is located in a subband other than the downlink subband of the first full-duplex resource;

[0592] The RACH resource corresponding to the first PDCCH monitoring opportunity is located in a subband other than the downlink subband of the first full-duplex resource;

[0593] The RACH resource corresponding to the first PDCCH monitoring opportunity is located in a subband other than the downlink subband of the first full-duplex resource;

[0594] The RACH resource corresponding to the first PDCCH monitoring opportunity is located in a subband other than the downlink subband of the first full-duplex resource;

[0595] The RACH resource corresponding to the first PDCCH monitoring opportunity is located in a subband other than the downlink subband of the first full-duplex resource.

[0596] In some embodiments, the first condition further includes at least one of the following:

[0597] The first time unit is a time unit corresponding to a full-duplex resource of the network side device;

[0598] The first time unit is a time division duplex, TDD, downlink time unit;

[0599] The first time unit is a time division duplex, TDD, uplink time unit;

[0600] The first time unit is a time division duplex, TDD, flexible time unit.

[0601] In some embodiments, the apparatus 500 further includes a first sending module, before the processing module 510 determines that the transmission mode in the first time unit is a half-duplex transmission mode or a full-duplex transmission mode, the first sending module is configured to:

[0602] Send at least one RACH configuration information to the terminal;

[0603] The at least one RACH configuration information includes at least one of the following:

[0604] First RACH configuration information;

[0605] Second RACH configuration information;

[0606] third RACH configuration information;

[0607] The first RACH configuration information corresponds to RACH transmission on full duplex resources of the network side device, the second RACH configuration information corresponds to RACH transmission of full duplex resources of the terminal, and the third RACH configuration information corresponds to RACH transmission on time division duplex (TDD) time units.

[0608] In some embodiments, the first RACH resource is valid, and the judgment condition that the first RACH resource is valid includes:

[0609] The first RACH resource does not overlap with a downlink sub-band or a guard band of the first full duplex resource; or

[0610] The first RACH resource does not overlap with a downlink sub-band or a guard band of the full duplex resources of the network side device.

[0611] In some embodiments, the apparatus 500 further includes a first communication module, the processing module 510 determines that the transmission mode on the first time unit is the full duplex transmission mode, and the first communication module is configured to perform at least one of the following:

[0612] Receiving RACH transmission on an uplink sub-band of the first full duplex resource;

[0613] Sending PDCCH on a downlink sub-band of the first full duplex resource.

[0614] In some embodiments, the apparatus 500 further includes a second communication module, the processing module 510 determines that the transmission mode on the first time unit is the half duplex transmission mode, and in the case that the first time unit is configured with full duplex resources of the network side device, the second communication module is configured to perform at least one of the following:

[0615] Receiving RACH transmission on an uplink sub-band of the full duplex resources of the network side device;

[0616] Sending PDCCH on a downlink sub-band of the full duplex resources of the network side device.

[0617] In some embodiments, the apparatus 500 further includes a first communication module, the processing module 510 determines that the transmission mode on the first time unit is the half duplex transmission mode, and in the case that the first time unit is not configured with full duplex resources of the network side device, the third communication module is configured to perform at least one of the following:

[0618] Receiving RACH transmission on frequency domain resources corresponding to time division duplex (TDD) uplink time units or TDD flexible time units;

[0619] transmit the PDCCH in a time division duplex, TDD, downlink time unit or a TDD flexible time unit.

[0620] In some embodiments, the first full duplex resource comprises a full duplex resource of a terminal or a full duplex resource of a network side device; wherein the full duplex resource of the terminal is a frequency domain resource configured according to a time division duplex, TDD, time unit, and the full duplex resource of the network side device is a frequency domain resource configured according to a full duplex resource of the network side device.

[0621] In some embodiments, the apparatus 500 further comprises a second sending module, before the processing module 510 determines that the transmission mode in the first time unit is the half duplex transmission mode or the full duplex transmission mode, the second sending module is configured to:

[0622] send first indication information to a terminal, the first indication information being used for indicating whether to determine the transmission mode in the first time unit as the half duplex transmission mode or the full duplex transmission mode according to the first condition.

[0623] In some embodiments, the apparatus 500 further comprises a third sending module, before the processing module 510 determines that the transmission mode in the first time unit is the half duplex transmission mode or the full duplex transmission mode, the third sending module is configured to:

[0624] send first configuration information to a terminal, the first configuration information being used for indicating a plurality of full duplex resources, the plurality of full duplex resources comprising the first full duplex resource, and the first full duplex resource being determined by the terminal or indicated by a network side device.

[0625] The apparatus provided by the embodiments of the present application can realize each process realized by the method embodiment of FIG. 7 and achieve the same technical effects. To avoid repetition, details are not described herein.

[0626] As shown in FIG. 10, the embodiments of the present application further provide a communication device 600, comprising a processor 601 and a memory 602, wherein the memory 602 stores programs or instructions executable on the processor 601. For example, when the communication device 600 is a terminal, the programs or instructions are executed by the processor 601 to realize each step of the transmission mode determination method 200 and achieve the same technical effects. When the communication device 600 is a network side device, the programs or instructions are executed by the processor 601 to realize each step of the transmission mode determination method 300 and achieve the same technical effects. To avoid repetition, details are not described herein.

[0627] The embodiment of the present application further provides a terminal comprising a processor and a communication interface, wherein the communication interface is coupled with the processor, and the processor is used to run programs or instructions to realize the steps in the method embodiment shown in FIG. 6. The terminal embodiment corresponds to the terminal-side method embodiment described above, and each implementation process and implementation manner of the method embodiment can be applied to the terminal embodiment, and the same technical effects can be achieved. The terminal can be the transmission mode determination apparatus shown in FIG. 8. Specifically, FIG. 11 is a schematic diagram of the hardware structure of a terminal for implementing the embodiment of the present application.

[0628] The terminal 700 comprises, but is not limited to, at least part of components such as a radio frequency unit 701, a network module 702, an audio output unit 703, an input unit 704, a sensor 705, a display unit 706, a user input unit 707, an interface unit 708, a memory 709, and a processor 710.

[0629] Those skilled in the art can understand that the terminal 700 can further comprise a power supply (such as a battery) for supplying power to each component, and the power supply can be logically connected with the processor 710 through a power management system, so as to realize functions such as management of charging, discharging, and power consumption management through the power management system. The terminal structure shown in FIG. 11 does not constitute a limitation on the terminal, and the terminal can comprise more or fewer components than those shown, or some components can be combined, or different components can be arranged, which will not be described here.

[0630] It should be understood that in the embodiment of the present application, the input unit 704 can comprise a graphic processor 7041 and a microphone 7042, and the graphic processor 7041 processes image data of a static picture or a video obtained by an image capturing device (such as a camera) in a video capturing mode or an image capturing mode. The display unit 706 can comprise a display panel 7061, which can be configured in the form of a liquid crystal display, an organic light emitting diode, etc. The user input unit 707 comprises at least one of a touch panel 7071 and other input devices 7072. The touch panel 7071 is also called a touch screen. The touch panel 7071 can comprise two parts of a touch detection device and a touch controller. The other input devices 7072 can comprise, but are not limited to, a physical keyboard, function keys (such as volume control keys, on-off keys, etc.), a trackball, a mouse, a joystick, etc., which will not be described here.

[0631] In the embodiment of the present application, after the radio frequency unit 701 receives downlink data from a network side device, the radio frequency unit 701 can transmit the downlink data to the processor 710 for processing. In addition, the radio frequency unit 701 can send uplink data to the network side device. Generally, the radio frequency unit 701 comprises, but is not limited to, an antenna, an amplifier, a transceiver, a coupler, a low noise amplifier, a duplexer, etc.

[0632] The memory 709 can be used to store software programs or instructions and various data. The memory 709 can mainly include a first storage area storing programs or instructions and a second storage area storing data, wherein the first storage area can store an operating system, application programs or instructions required by at least one function (such as a sound playing function, an image playing function, etc.), and the like. In addition, the memory 709 can include a volatile memory or a non-volatile memory. The non-volatile memory can be a Read-Only Memory (ROM), a Programmable ROM (PROM), an Erasable PROM (EPROM), an Electrically EPROM (EEPROM), or a flash memory. The volatile memory can be a Random Access Memory (RAM), a Static RAM (SRAM), a Dynamic RAM (DRAM), a Synchronous DRAM (SDRAM), a Double Data Rate SDRAM (DDR SDRAM), an Enhanced SDRAM (ESDRAM), a Synch link DRAM (SLDRAM), and a Direct Rambus RAM (DRRAM). The memory 709 in the embodiments of the present application includes but is not limited to these and any other suitable types of memory.

[0633] The processor 710 can include one or more processing units; optionally, the processor 710 integrates an application processor and a modem processor, wherein the application processor mainly processes operations related to an operating system, a user interface, and an application program, and the modem processor mainly processes wireless communication signals, such as a baseband processor. It can be understood that the above-mentioned modem processor can also not be integrated into the processor 710.

[0634] The processor 710 is configured to:

[0635] For a first time unit corresponding to a first full-duplex resource, in a case where a first condition is met, determining that a transmission mode on the first time unit is a half-duplex transmission mode or a full-duplex transmission mode.

[0636] The first condition includes at least one of the following:

[0637] The first time unit is configured with first random access channel (RACH) resources.

[0638] The terminal initiates a first random access channel (RACH) transmission in the first time unit.

[0639] The first time unit is configured with a first physical downlink control channel (PDCCH) monitoring opportunity related to random access channel (RACH).

[0640] The terminal monitors a first physical downlink control channel (PDCCH) related to random access channel (RACH) in the first time unit.

[0641] In the embodiments of the present application, when the first condition is met, it is explained that the first time unit is not only configured with the first full-duplex resource, but also involves transmission related to the random access process. In this case, the terminal determines the transmission mode on the first time unit to be a half-duplex transmission mode or a full-duplex transmission mode, which means that the terminal can perform transmission related to the random access process based on the full-duplex transmission mode on the first time unit, or can fall back to the half-duplex transmission mode to perform transmission related to the random access process. Therefore, when the network side device configures the first full-duplex resource or the resource related to the random access process for the terminal, even if the first full-duplex resource and the resource related to the random access process do not match, by falling back to the half-duplex transmission mode, the random access performance can still be guaranteed. That is, the transmission mode determination method provided in the present application not only improves the flexibility of full-duplex resource configuration, but also reduces the complexity of full-duplex resource configuration on the basis of guaranteeing the random access performance, thereby improving the communication performance.

[0642] In addition, when the transmission mode on the first time unit is a half-duplex transmission mode, the self-interference of uplink transmission on downlink reception can also be reduced, thereby improving the random access performance.

[0643] It can be understood that the implementation processes of each implementation manner mentioned in the embodiments can refer to the related descriptions of the above-mentioned transmission mode determination method embodiments, and achieve the same or corresponding technical effects. To avoid repetition, they will not be described here again.

[0644] The embodiments of the present application also provide a network side device, which includes a processor and a communication interface, the communication interface and the processor are coupled, and the processor is used to run programs or instructions to realize the steps of the method embodiments as shown in FIG. 7. The network side device embodiments correspond to the above-mentioned network side device method embodiments. Each implementation process and implementation manner of the above-mentioned method embodiments can be applied to the network side device embodiments, and the same technical effects can be achieved.

[0645] Specifically, the embodiment of the present application further provides a network side device, which can be the transmission mode determination apparatus shown in FIG. 9. As shown in FIG. 12, the network side device 800 includes an antenna 81, a radio frequency device 82, a baseband device 83, a processor 84 and a memory 85. The antenna 81 is connected with the radio frequency device 82. In the uplink direction, the radio frequency device 82 receives information through the antenna 81 and sends the received information to the baseband device 83 for processing. In the downlink direction, the baseband device 83 processes information to be sent and sends the processed information to the radio frequency device 82, and the radio frequency device 82 processes the received information and sends the processed information out through the antenna 81.

[0646] The method performed by the network side device in the above embodiment can be implemented in the baseband device 83, which includes a baseband processor.

[0647] The baseband device 83 can include at least one baseband board, for example, on which a plurality of chips are arranged, one of which is a baseband processor, for example. As shown in FIG. 12, the baseband device 83 is connected with the memory 85 through a bus interface to call programs in the memory 85 and perform the operations of the network device shown in the above method embodiment.

[0648] The network side device can further include a network interface 86, which is a Common Public Radio Interface (CPRI), for example.

[0649] Specifically, the network side device 800 of the embodiment of the present application further includes instructions or programs stored in the memory 85 and executable on the processor 84, and the processor 84 calls the instructions or programs in the memory 85 to perform the method performed by each module shown in FIG. 9 and achieve the same technical effects. To avoid repetition, details are not described herein.

[0650] The embodiment of the present application further provides a readable storage medium, which stores programs or instructions, and the programs or instructions are executed by a processor to implement each process of the above transmission mode determination method embodiment and achieve the same technical effects. To avoid repetition, details are not described herein.

[0651] The processor is the processor in the terminal in the above embodiment. The readable storage medium includes a computer readable storage medium, such as a computer readable only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk, etc. In some examples, the readable storage medium can be a non-transitory readable storage medium.

[0652] The chip provided by the embodiment of the present application also can be called a system chip, a chip system, a system on chip, or the like.

[0653] It should be understood that the chip mentioned in the embodiment of the present application can also be called a system chip, a chip system, a system on chip, or the like.

[0654] The embodiment of the present application further provides a computer program / program product stored in a storage medium, and the computer program / program product is executed by at least one processor to implement the processes of the transmission mode determination method embodiments and achieve the same technical effects. To avoid repetition, details are not repeated here.

[0655] The embodiment of the present application further provides a communication system, including a terminal and a network side device. The terminal can be used to execute the steps executed by the terminal in the transmission mode determination method described above. The network side device can be used to execute the steps executed by the network side device in the transmission mode determination method described above.

[0656] It should be noted that in this document, the terms "comprising", "including", or any other variant thereof are intended to cover non-exclusive inclusions, so that processes, methods, articles, or devices that include a series of elements not only include those elements, but also include other elements not explicitly listed, or include elements inherent to such processes, methods, articles, or devices. Without more limitations, the element defined by the statement "including a" does not exclude the presence of other identical elements in the process, method, article, or device that includes the element. In addition, it should be pointed out that the scope of the methods and devices in the embodiments of the present application is not limited to the order of performing functions as shown or discussed, and can also include performing functions in a substantially simultaneous manner or in reverse order, for example, the described method can be performed in an order different from that described, and various steps can also be added, omitted, or combined. In addition, the features described with reference to certain examples can be combined in other examples.

[0657] From the above description of the embodiments, those skilled in the art can clearly understand that the above-mentioned embodiment methods can be realized by means of computer software products and general hardware platforms, and of course, can also be realized by hardware. The computer software product is stored in a storage medium (such as ROM, RAM, magnetic disc, optical disc, etc.), and includes a plurality of instructions for making the terminal or network side device execute the method described in each embodiment of the present application.

[0658] The embodiments of the present application are described above with reference to the accompanying drawings, but the present application is not limited to the above-described specific embodiments, and the above-described specific embodiments are merely illustrative, but not restrictive, and a person of ordinary skill in the art can make many forms of embodiments under the inspiration of the present application without departing from the purpose of the present application and the scope protected by the claims, and these embodiments all belong to the protection of the present application.

Claims

1. A method for determining a transmission mode, wherein, include: For the first time unit corresponding to the first full-duplex resource, under the condition of satisfying the first condition, the terminal determines that the transmission mode in the first time unit is half-duplex transmission mode or full-duplex transmission mode. The first condition includes at least one of the following: The first time unit is configured with a first random access channel (RACH) resource; The terminal initiates a first random access channel (RACH) transmission in the first time unit. The first time unit is configured with a first physical downlink control channel (PDCCH) listening opportunity associated with the random access channel (RACH); The terminal listens to the first physical downlink control channel (PDCCH) associated with the random access channel (RACH) in the first time unit.

2. The method according to claim 1, wherein, The terminal determines whether the transmission mode in the first time unit is half-duplex or full-duplex, including: If the second condition is met, the terminal determines that the transmission mode in the first time unit is the full-duplex mode: The second condition further includes at least one of the following: The first RACH resource is located in the uplink subband of the first full-duplex resource; The first RACH resource does not overlap with the downlink subband of the first full-duplex resource or the guard band of the first full-duplex resource; The RACH resource corresponding to the first RACH transmission is located in the uplink subband of the first full-duplex resource; The RACH resource corresponding to the first RACH transmission does not overlap with the downlink subband of the first full-duplex resource or the guard band of the first full-duplex resource; The frequency domain spacing between the RACH resource corresponding to the first RACH transmission and the downlink subband of the first full-duplex resource is greater than or equal to the first preset spacing. The frequency domain resource corresponding to the first PDCCH listening opportunity is located in the downlink subband of the first full-duplex resource; The frequency domain resources corresponding to the first PDCCH monitoring opportunity do not overlap with the uplink subband of the first full-duplex resource or the guard band of the first full-duplex resource. The frequency domain resource corresponding to the first PDCCH is located in the downlink subband of the first full-duplex resource; The frequency domain resources corresponding to the first PDCCH do not overlap with the uplink subband of the first full-duplex resource or the guard band of the first full-duplex resource; The frequency domain spacing between the frequency domain resource corresponding to the first PDCCH and the uplink subband of the first full-duplex resource is greater than or equal to the second preset spacing.

3. The method according to claim 1, wherein, The terminal determines whether the transmission mode in the first time unit is half-duplex or full-duplex, including: If the third condition is met, the terminal determines that the transmission mode in the first time unit is the half-duplex transmission mode: The third condition further includes at least one of the following: The first RACH resource is located in the uplink subband of the first full-duplex resource, and the frequency domain spacing between the RACH resource corresponding to the first RACH transmission and the downlink subband of the first full-duplex resource is less than a first preset spacing. The first RACH resource is located in a subband outside the uplink subband of the first full-duplex resource; The first RACH resource overlaps with the downlink subband of the first full-duplex resource or the guard band of the first full-duplex resource; The RACH resource corresponding to the first RACH transmission is located in a subband outside the uplink subband of the first full-duplex resource; The RACH resource corresponding to the first RACH transmission overlaps with the downlink subband of the first full-duplex resource or the guard band of the first full-duplex resource; The RACH resource corresponding to the first PDCCH listening opportunity is located in the downlink sub-band of the first full-duplex resource, and the frequency domain spacing between the RACH resource corresponding to the first PDCCH and the uplink sub-band of the first full-duplex resource is less than the second preset spacing. The RACH resource corresponding to the first PDCCH listening opportunity is located in a subband outside the downlink subband of the first full-duplex resource; The RACH resource corresponding to the first PDCCH listening opportunity overlaps with the uplink subband of the first full-duplex resource or the guard band of the first full-duplex resource; The frequency domain resource corresponding to the first PDCCH is located in a subband outside the downlink subband of the first full-duplex resource; The frequency domain resources corresponding to the first PDCCH overlap with the uplink subband of the first full-duplex resource or the guard band of the first full-duplex resource.

4. The method according to any one of claims 1 to 3, wherein, The first condition also includes at least one of the following: The first time unit is the time unit corresponding to the full-duplex resources of the network-side device; The first time unit is a time-division duplex (TDD) downlink time unit; The first time unit is a time-division duplex (TDD) uplink time unit; The first time unit is a time-division duplex (TDD) flexible time unit.

5. The method according to any one of claims 1 to 4, wherein, Before the terminal determines whether the transmission mode in the first time unit is half-duplex or full-duplex, the method further includes: The terminal receives at least one RACH configuration information from the network-side device; The at least one RACH configuration information includes at least one of the following: First RACH configuration information; Second RACH configuration information; Third RACH configuration information; Wherein, the first RACH configuration information corresponds to RACH transmission on the full-duplex resources of the network-side device, the second RACH configuration information corresponds to RACH transmission on the full-duplex resources of the terminal, and the third RACH configuration information corresponds to RACH transmission on the time-division duplex (TDD) time unit.

6. The method according to any one of claims 1 to 5, wherein, The first RACH resource is valid, and the conditions for determining the validity of the first RACH resource include: The first RACH resource does not overlap with the downlink subband or guard band of the first full-duplex resource; or The first RACH resource does not overlap with the downlink subband or guard band of the full-duplex resource of the network-side device.

7. The method according to any one of claims 1 to 6, wherein, The terminal determines that the transmission mode in the first time unit is the full-duplex transmission mode, and the method further includes at least one of the following: The terminal initiates RACH transmission in the uplink subband of the first full-duplex resource; The terminal listens to the PDCCH in the downlink subband of the first full-duplex resource.

8. The method according to any one of claims 1 to 6, wherein, The terminal determines that the transmission mode in the first time unit is the half-duplex transmission mode. If the first time unit is configured with full-duplex resources from the network-side equipment, the method further includes at least one of the following: The terminal initiates RACH transmission in the uplink subband of the full-duplex resources of the network-side device; The terminal listens to the downlink subband PDCCH of the full-duplex resources of the network-side device.

9. The method according to any one of claims 1 to 6, wherein, The terminal determines that the transmission mode in the first time unit is the half-duplex transmission mode. If no full-duplex resources are configured for the network-side equipment in the first time unit, the method further includes at least one of the following: The terminal initiates RACH transmission in the frequency domain resources corresponding to the uplink time unit of Time Division Duplex (TDD) or the frequency domain resources corresponding to the flexible time unit of TDD. The terminal listens to the PDCCH on the frequency domain resources corresponding to the downlink time unit of time division duplex (TDD) or the frequency domain resources corresponding to the flexible time unit of TDD.

10. The method according to any one of claims 1 to 9, wherein, The first full-duplex resource includes the full-duplex resource of the terminal or the full-duplex resource of the network-side device; wherein, the full-duplex resource of the terminal is a frequency domain resource configured according to the time division duplex (TDD) time unit, and the full-duplex resource of the terminal is a frequency domain resource configured according to the full-duplex resource of the network-side device.

11. The method according to any one of claims 1 to 10, wherein, Before the terminal determines whether the transmission mode in the first time unit is half-duplex or full-duplex, the method further includes: The terminal receives first indication information from the network-side device. The first indication information is used to indicate whether the transmission mode in the first time unit is determined to be the half-duplex transmission mode or the full-duplex transmission mode according to the first condition.

12. The method according to any one of claims 1 to 11, wherein, Before the terminal determines whether the transmission mode in the first time unit is half-duplex or full-duplex, the method further includes: The terminal receives first configuration information from the network-side device. The first configuration information is used to indicate multiple full-duplex resources, including the first full-duplex resource, which is determined by the terminal or indicated by the network-side device.

13. A method for determining a transmission mode, wherein, include: For the first time unit corresponding to the first full-duplex resource, under the condition of satisfying the first condition, the network-side device determines that the transmission mode in the first time unit is either half-duplex transmission mode or full-duplex transmission mode. The first condition includes at least one of the following: The first time unit is configured with a first random access channel (RACH) resource; The network-side device receives the first random access channel (RACH) transmission in the first time unit. The first time unit is configured with a first physical downlink control channel (PDCCH) listening opportunity associated with the random access channel (RACH); The network-side device transmits a first physical downlink control channel (PDCCH) associated with the random access channel (RACH) in the first time unit.

14. The method according to claim 13, wherein, The network-side device determines whether the transmission mode in the first time unit is half-duplex or full-duplex, including: If the second condition is met, the network-side device determines that the transmission mode in the first time unit is the full-duplex mode: The second condition further includes at least one of the following: The first RACH resource is located in the uplink subband of the first full-duplex resource; The first RACH resource does not overlap with the downlink subband of the first full-duplex resource or the guard band of the first full-duplex resource; The RACH resource corresponding to the first RACH transmission is located in the uplink subband of the first full-duplex resource; The RACH resource corresponding to the first RACH transmission does not overlap with the downlink subband of the first full-duplex resource or the guard band of the first full-duplex resource; The frequency domain spacing between the RACH resource corresponding to the first RACH transmission and the downlink subband of the first full-duplex resource is greater than or equal to the first preset spacing. The frequency domain resource corresponding to the first PDCCH listening opportunity is located in the downlink subband of the first full-duplex resource; The frequency domain resources corresponding to the first PDCCH monitoring opportunity do not overlap with the uplink subband of the first full-duplex resource or the guard band of the first full-duplex resource. The frequency domain resource corresponding to the first PDCCH is located in the downlink subband of the first full-duplex resource; The frequency domain resources corresponding to the first PDCCH do not overlap with the uplink subband of the first full-duplex resource or the guard band of the first full-duplex resource; The frequency domain spacing between the frequency domain resource corresponding to the first PDCCH and the uplink subband of the first full-duplex resource is greater than or equal to the second preset spacing.

15. The method according to claim 13, wherein, The network-side device determines whether the transmission mode in the first time unit is half-duplex or full-duplex, including: If the third condition is met, the network-side device determines that the transmission mode in the first time unit is the half-duplex transmission mode: The third condition further includes at least one of the following: The first RACH resource is located in the uplink subband of the first full-duplex resource, and the frequency domain spacing between the RACH resource corresponding to the first RACH transmission and the downlink subband of the first full-duplex resource is less than a first preset spacing. The first RACH resource is located in a subband outside the uplink subband of the first full-duplex resource; The first RACH resource overlaps with the downlink subband of the first full-duplex resource or the guard band of the first full-duplex resource; The RACH resource corresponding to the first RACH transmission is located in a subband outside the uplink subband of the first full-duplex resource; The RACH resource corresponding to the first RACH transmission overlaps with the downlink subband of the first full-duplex resource or the guard band of the first full-duplex resource; The RACH resource corresponding to the first PDCCH listening opportunity is located in the downlink sub-band of the first full-duplex resource, and the frequency domain spacing between the RACH resource corresponding to the first PDCCH and the uplink sub-band of the first full-duplex resource is less than the second preset spacing. The RACH resource corresponding to the first PDCCH listening opportunity is located in a subband outside the downlink subband of the first full-duplex resource; The RACH resource corresponding to the first PDCCH listening opportunity overlaps with the uplink subband of the first full-duplex resource or the guard band of the first full-duplex resource; The frequency domain resource corresponding to the first PDCCH is located in a subband outside the downlink subband of the first full-duplex resource; The frequency domain resources corresponding to the first PDCCH overlap with the uplink subband of the first full-duplex resource or the guard band of the first full-duplex resource.

16. The method according to any one of claims 13 to 15, wherein, The first condition also includes at least one of the following: The first time unit is the time unit corresponding to the full-duplex resources of the network-side device; The first time unit is a time-division duplex (TDD) downlink time unit; The first time unit is a time-division duplex (TDD) uplink time unit; The first time unit is a time-division duplex (TDD) flexible time unit.

17. The method according to any one of claims 13 to 16, wherein, Before the network-side device determines whether the transmission mode in the first time unit is half-duplex or full-duplex, the method further includes: The network-side device sends at least one RACH configuration message to the terminal; The at least one RACH configuration information includes at least one of the following: First RACH configuration information; Second RACH configuration information; Third RACH configuration information; Wherein, the first RACH configuration information corresponds to RACH transmission on the full-duplex resources of the network-side device, the second RACH configuration information corresponds to RACH transmission on the full-duplex resources of the terminal, and the third RACH configuration information corresponds to RACH transmission on the time-division duplex (TDD) time unit.

18. The method according to any one of claims 13 to 17, wherein, The first RACH resource is valid, and the conditions for determining the validity of the first RACH resource include: The first RACH resource does not overlap with the downlink subband or guard band of the first full-duplex resource; or The first RACH resource does not overlap with the downlink subband or guard band of the full-duplex resource of the network-side device.

19. The method according to any one of claims 13 to 18, wherein, The network-side device determines that the transmission mode in the first time unit is the full-duplex transmission mode, and the method further includes at least one of the following: The network-side device receives RACH transmission in the uplink subband of the first full-duplex resource; The network-side device transmits the PDCCH in the downlink subband of the first full-duplex resource.

20. The method according to any one of claims 13 to 18, wherein, The network-side device determines that the transmission mode in the first time unit is the half-duplex transmission mode. If the first time unit is configured with full-duplex resources of the network-side device, the method further includes at least one of the following: The network-side device receives RACH transmission in the uplink subband of the full-duplex resources of the network-side device. The network-side device transmits PDCCH in the downlink subband of the full-duplex resources of the network-side device.

21. The method according to any one of claims 13 to 18, wherein, The network-side device determines that the transmission mode in the first time unit is the half-duplex transmission mode. If the network-side device is not configured with full-duplex resources in the first time unit, the method further includes at least one of the following: The network-side device receives RACH transmission in the frequency domain resources corresponding to the Time Division Duplex (TDD) uplink time unit or the TDD flexible time unit. The network-side device sends PDCCH in the Time Division Duplex (TDD) downlink time unit or the TDD flexible time unit.

22. The method according to any one of claims 13 to 21, wherein, The first full-duplex resource includes the full-duplex resource of the terminal or the full-duplex resource of the network-side device; wherein, the full-duplex resource of the terminal is a frequency domain resource configured according to the time division duplex (TDD) time unit, and the full-duplex resource of the terminal is a frequency domain resource configured according to the full-duplex resource of the network-side device.

23. The method according to any one of claims 13 to 22, wherein, Before the network-side device determines whether the transmission mode in the first time unit is half-duplex or full-duplex, the method further includes: The network-side device sends a first indication message to the terminal, the first indication message being used to indicate whether the transmission mode in the first time unit is determined to be the half-duplex transmission mode or the full-duplex transmission mode according to the first condition.

24. The method according to any one of claims 13 to 23, wherein, Before the network-side device determines whether the transmission mode in the first time unit is half-duplex or full-duplex, the method further includes: The network-side device sends first configuration information to the terminal. The first configuration information is used to indicate multiple full-duplex resources, including the first full-duplex resource. The first full-duplex resource is determined by the terminal or indicated by the network-side device.

25. A transmission mode determination device, wherein, include: Processing module, used for: For the first time unit corresponding to the first full-duplex resource, under the condition of satisfying the first condition, the transmission mode in the first time unit is determined to be either half-duplex transmission mode or full-duplex transmission mode. The first condition includes at least one of the following: The first time unit is configured with a first random access channel (RACH) resource; The terminal initiates the first random access channel (RACH) transmission in the first time unit; The first time unit is configured with a first physical downlink control channel (PDCCH) listening opportunity associated with the random access channel (RACH); The terminal listens to the first physical downlink control channel (PDCCH) associated with the random access channel (RACH) in the first time unit.

26. The apparatus according to claim 25, wherein, The processing module is specifically used for: If the second condition is met, the transmission mode in the first time unit is determined to be the full-duplex mode: The second condition further includes at least one of the following: The first RACH resource is located in the uplink subband of the first full-duplex resource; The first RACH resource does not overlap with the downlink subband of the first full-duplex resource or the guard band of the first full-duplex resource; The RACH resource corresponding to the first RACH transmission is located in the uplink subband of the first full-duplex resource; The RACH resource corresponding to the first RACH transmission does not overlap with the downlink subband of the first full-duplex resource or the guard band of the first full-duplex resource; The frequency domain spacing between the RACH resource corresponding to the first RACH transmission and the downlink subband of the first full-duplex resource is greater than or equal to the first preset spacing. The frequency domain resource corresponding to the first PDCCH listening opportunity is located in the downlink subband of the first full-duplex resource; The frequency domain resources corresponding to the first PDCCH monitoring opportunity do not overlap with the uplink subband of the first full-duplex resource or the guard band of the first full-duplex resource. The frequency domain resource corresponding to the first PDCCH is located in the downlink subband of the first full-duplex resource; The frequency domain resources corresponding to the first PDCCH do not overlap with the uplink subband of the first full-duplex resource or the guard band of the first full-duplex resource; The frequency domain spacing between the frequency domain resource corresponding to the first PDCCH and the uplink subband of the first full-duplex resource is greater than or equal to the second preset spacing.

27. The apparatus according to claim 25, wherein, The processing module is specifically used for: If the third condition is met, the terminal determines that the transmission mode in the first time unit is the half-duplex transmission mode: The third condition further includes at least one of the following: The first RACH resource is located in the uplink subband of the first full-duplex resource, and the frequency domain spacing between the RACH resource corresponding to the first RACH transmission and the downlink subband of the first full-duplex resource is less than a first preset spacing. The first RACH resource is located in a subband outside the uplink subband of the first full-duplex resource; The first RACH resource overlaps with the downlink subband of the first full-duplex resource or the guard band of the first full-duplex resource; The RACH resource corresponding to the first RACH transmission is located in a subband outside the uplink subband of the first full-duplex resource; The RACH resource corresponding to the first RACH transmission overlaps with the downlink subband of the first full-duplex resource or the guard band of the first full-duplex resource; The RACH resource corresponding to the first PDCCH listening opportunity is located in the downlink sub-band of the first full-duplex resource, and the frequency domain spacing between the RACH resource corresponding to the first PDCCH and the uplink sub-band of the first full-duplex resource is less than the second preset spacing. The RACH resource corresponding to the first PDCCH listening opportunity is located in a subband outside the downlink subband of the first full-duplex resource; The RACH resource corresponding to the first PDCCH listening opportunity overlaps with the uplink subband of the first full-duplex resource or the guard band of the first full-duplex resource; The frequency domain resource corresponding to the first PDCCH is located in a subband outside the downlink subband of the first full-duplex resource; The frequency domain resources corresponding to the first PDCCH overlap with the uplink subband of the first full-duplex resource or the guard band of the first full-duplex resource.

28. A transmission mode determination device, wherein, include: Processing module, used for: For the first time unit corresponding to the first full-duplex resource, under the condition of satisfying the first condition, the transmission mode in the first time unit is determined to be either half-duplex transmission mode or full-duplex transmission mode. The first condition includes at least one of the following: The first time unit is configured with a first random access channel (RACH) resource; The network-side device receives the first random access channel (RACH) transmission in the first time unit; The first time unit is configured with a first physical downlink control channel (PDCCH) listening opportunity associated with the random access channel (RACH); The network-side device transmits the first physical downlink control channel (PDCCH) associated with the random access channel (RACH) in the first time unit.

29. The apparatus according to claim 28, wherein, The processing module is specifically used for: If the second condition is met, the network-side device determines that the transmission mode in the first time unit is the full-duplex mode: The second condition further includes at least one of the following: The first RACH resource is located in the uplink subband of the first full-duplex resource; The first RACH resource does not overlap with the downlink subband of the first full-duplex resource or the guard band of the first full-duplex resource; The RACH resource corresponding to the first RACH transmission is located in the uplink subband of the first full-duplex resource; The RACH resource corresponding to the first RACH transmission does not overlap with the downlink subband of the first full-duplex resource or the guard band of the first full-duplex resource; The frequency domain spacing between the RACH resource corresponding to the first RACH transmission and the downlink subband of the first full-duplex resource is greater than or equal to the first preset spacing. The frequency domain resource corresponding to the first PDCCH listening opportunity is located in the downlink subband of the first full-duplex resource; The frequency domain resources corresponding to the first PDCCH monitoring opportunity do not overlap with the uplink subband of the first full-duplex resource or the guard band of the first full-duplex resource. The frequency domain resource corresponding to the first PDCCH is located in the downlink subband of the first full-duplex resource; The frequency domain resources corresponding to the first PDCCH do not overlap with the uplink subband of the first full-duplex resource or the guard band of the first full-duplex resource; The frequency domain spacing between the frequency domain resource corresponding to the first PDCCH and the uplink subband of the first full-duplex resource is greater than or equal to the second preset spacing.

30. The apparatus according to claim 28, wherein, The processing module is specifically used for: If the third condition is met, the network-side device determines that the transmission mode in the first time unit is the half-duplex transmission mode: The third condition further includes at least one of the following: The first RACH resource is located in the uplink subband of the first full-duplex resource, and the frequency domain spacing between the RACH resource corresponding to the first RACH transmission and the downlink subband of the first full-duplex resource is less than a first preset spacing. The first RACH resource is located in a subband outside the uplink subband of the first full-duplex resource; The first RACH resource overlaps with the downlink subband of the first full-duplex resource or the guard band of the first full-duplex resource; The RACH resource corresponding to the first RACH transmission is located in a subband outside the uplink subband of the first full-duplex resource; The RACH resource corresponding to the first RACH transmission overlaps with the downlink subband of the first full-duplex resource or the guard band of the first full-duplex resource; The RACH resource corresponding to the first PDCCH listening opportunity is located in the downlink sub-band of the first full-duplex resource, and the frequency domain spacing between the RACH resource corresponding to the first PDCCH and the uplink sub-band of the first full-duplex resource is less than the second preset spacing. The RACH resource corresponding to the first PDCCH listening opportunity is located in a subband outside the downlink subband of the first full-duplex resource; The RACH resource corresponding to the first PDCCH listening opportunity overlaps with the uplink subband of the first full-duplex resource or the guard band of the first full-duplex resource; The frequency domain resource corresponding to the first PDCCH is located in a subband outside the downlink subband of the first full-duplex resource; The frequency domain resources corresponding to the first PDCCH overlap with the uplink subband of the first full-duplex resource or the guard band of the first full-duplex resource.

31. A terminal, wherein, It includes a processor and a memory, the memory storing a program or instructions that can run on the processor, the program or instructions being executed by the processor to implement the steps of the transmission mode determination method according to any one of claims 1 to 12.

32. A network-side device, wherein, It includes a processor and a memory, the memory storing a program or instructions that can run on the processor, the program or instructions being executed by the processor to implement the steps of the transmission mode determination method according to any one of claims 13 to 24.

33. A readable storage medium, wherein, The readable storage medium stores a program or instructions, which, when executed by a processor, implement the transmission mode determination method according to any one of claims 1 to 12, or implement the steps of the transmission mode determination method according to any one of claims 13 to 24.

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