Reference signal transmission method and apparatus, communication device, and storage medium

Abstract

The present application relates to the technical field of communications, and discloses a reference signal transmission method and apparatus, a communication device, and a storage medium. The reference signal transmission method of embodiments of the present application comprises: a communication device executes at least one of the following: transmitting a first reference signal on a first frequency domain unit of a first cell, and executing at least one of the following: not transmitting the first reference signal on a second frequency domain unit of the first cell, and transmitting a second reference signal in a first mode on a third frequency domain unit of the first cell; transmitting a third reference signal on a fourth frequency domain unit of the first cell, the third reference signal being triggered on demand; and transmitting a fourth reference signal in a second mode on a fifth frequency domain unit of the first cell.

Description

Reference signal transmission method, apparatus, communication equipment and storage medium

[0001] Cross-reference to related applications

[0002] This application claims priority to Chinese Patent Application No. 202411637960.9, filed on November 15, 2024, entitled “Reference Signal Transmission Method, Apparatus, Communication Equipment and Storage Medium”, the entire contents of which are incorporated herein by reference. Technical Field

[0003] This application belongs to the field of communication technology, and specifically relates to a reference signal transmission method, apparatus, communication equipment, and storage medium. Background Technology

[0004] Currently, there is an effective aggregation method for multiple frequency domain units, which allows communication using multiple different frequency domain units within the same cell. This significantly reduces the complexity and overhead on both sides, and also improves data transmission performance such as throughput and latency, as well as operational flexibility. However, the power consumption of network-side equipment remains relatively high. Summary of the Invention

[0005] This application provides a reference signal transmission method, apparatus, communication device, and storage medium, which can solve the problem of high power consumption of network-side devices in communication scenarios with multiple frequency domain units in a single cell in related technologies.

[0006] In a first aspect, a reference signal transmission method is provided, the method comprising:

[0007] The communication device performs at least one of the following:

[0008] A first reference signal is transmitted in a first frequency domain cell of a first cell, and a first action is performed, wherein the first action includes at least one of the following: not transmitting the first reference signal in a second frequency domain cell of the first cell, and transmitting a second reference signal in a first mode in a third frequency domain cell of the first cell;

[0009] A third reference signal is transmitted on the fourth frequency domain cell of the first cell, and the third reference signal is triggered on demand;

[0010] The fourth reference signal is transmitted in the second mode on the fifth frequency domain cell of the first cell.

[0011] Secondly, a reference signal transmission device is provided, the device comprising:

[0012] The transmission module is configured to perform at least one of the following:

[0013] A first reference signal is transmitted in a first frequency domain cell of a first cell, and a first action is performed, wherein the first action includes at least one of the following: not transmitting the first reference signal in a second frequency domain cell of the first cell, and transmitting a second reference signal in a first mode in a third frequency domain cell of the first cell;

[0014] A third reference signal is transmitted on the fourth frequency domain cell of the first cell, and the third reference signal is triggered on demand;

[0015] The fourth reference signal is transmitted in the second mode on the fifth frequency domain cell of the first cell.

[0016] Thirdly, a communication device is provided, comprising a processor and a memory, the memory storing a program or instructions executable on the processor, the program or instructions, when executed by the processor, implementing the steps of the method described in the first aspect.

[0017] Fourthly, a communication device is provided, including a processor and a communication interface, wherein the communication interface is used to perform at least one of the following:

[0018] A first reference signal is transmitted in a first frequency domain cell of a first cell, and a first action is performed, wherein the first action includes at least one of the following: not transmitting the first reference signal in a second frequency domain cell of the first cell, and transmitting a second reference signal in a first mode in a third frequency domain cell of the first cell;

[0019] A third reference signal is transmitted on the fourth frequency domain cell of the first cell, and the third reference signal is triggered on demand;

[0020] The fourth reference signal is transmitted in the second mode on the fifth frequency domain cell of the first cell.

[0021] Fifthly, a readable storage medium is provided, on which a program or instructions are stored, which, when executed by a processor, implement the steps of the method described in the first aspect.

[0022] In a sixth aspect, a chip is provided, the chip including a processor and a communication interface coupled to the processor, the processor being used to run programs or instructions to implement the method as described in the first aspect.

[0023] In a seventh aspect, a computer program / program product is provided, the computer program / program product being stored in a storage medium, the program / program product being executed by at least one processor to perform the steps of the method as described in the first aspect.

[0024] Eighthly, embodiments of this application provide a reference signal transmission apparatus for performing the steps of the reference signal transmission method as described in the first or second aspect.

[0025] In this embodiment of the application, the communication device can transmit the first reference signal on the first frequency domain unit of the first cell without transmitting the first reference signal on the second frequency domain unit, thereby reducing the transmission of the reference signal on the frequency domain unit of the first cell and thus reducing the power consumption of the communication device in transmitting the reference signal.

[0026] The communication equipment can also transmit a second reference signal in a first mode in a third frequency domain unit while transmitting a first reference signal in a first frequency domain unit in a first cell. In this way, based on transmitting the first reference signal in the first frequency domain unit, by transmitting a second reference signal that satisfies the specific first mode in the third frequency domain unit, the requirement to reduce the power consumption of parameter signal transmission can be met to a certain extent.

[0027] The communication equipment can also transmit a third reference signal on the fourth frequency domain unit. This third reference signal is triggered on demand, which allows for flexible activation of reference signal transmission on certain frequency domain units as needed according to service requirements. This reduces the power consumption of the equipment transmitting the reference signal and provides accurate synchronization and AGC for the equipment to access the network.

[0028] The communication device can also transmit the fourth reference signal in the second mode on the fifth frequency domain unit. In this way, by transmitting the fourth reference signal that satisfies the specific second mode on the fifth frequency domain unit, the requirement to reduce the power consumption of parameter signal transmission can be met to a certain extent.

[0029] Therefore, in the embodiments of this application, in the scenario of a single cell with multiple frequency domain units, the transmission power consumption of the reference signal can be reduced. Attached Figure Description

[0030] Figure 1 is a block diagram of a wireless communication system applicable to an embodiment of this application;

[0031] Figure 2 is a schematic diagram of the time / frequency structure of a single SS block in an embodiment of this application;

[0032] Figure 3 is a schematic diagram of the transmission of SSB set in an embodiment of this application;

[0033] Figure 4 is a flowchart of a reference signal transmission method in an embodiment of this application;

[0034] Figure 5 is a schematic diagram of the fourth reference signal transmitted in the second mode in an embodiment of this application;

[0035] Figure 6 is a schematic diagram of the transmission of the synchronization signal in Embodiment 1 of this application;

[0036] Figure 7 is a schematic diagram of the transmission of the synchronization signal in Embodiment 2 of this application;

[0037] Figure 8 is a structural block diagram of a reference signal transmission device according to an embodiment of this application;

[0038] Figure 9 is a structural block diagram of a communication device according to an embodiment of this application;

[0039] Figure 10 is a structural block diagram of a terminal according to an embodiment of this application;

[0040] Figure 11 is a structural block diagram of a network-side device according to an embodiment of this application. Specific Implementation

[0041] The technical solutions of the embodiments of this application will be clearly described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application are within the scope of protection of this application.

[0042] The terms "first," "second," etc., used in this application are used to distinguish similar objects and not to describe a specific order or sequence. It should be understood that such terms can be used interchangeably where appropriate so that embodiments of this application can be implemented in orders other than those illustrated or described herein, and the objects distinguished by "first" and "second" are generally of the same class, without limiting the number of objects; for example, the first object can be one or more. Furthermore, "or" in this application indicates at least one of the connected objects. For example, "A or B" covers three scenarios: Scenario 1: including A but not B; Scenario 2: including B but not A; Scenario 3: including both A and B. The character " / " generally indicates that the preceding and following objects are in an "or" relationship.

[0043] The term "instruction" in this application can be either a direct instruction (or explicit instruction) or an indirect instruction (or implicit instruction). A direct instruction can be understood as one in which the sender explicitly informs the receiver of specific information, the operation to be performed, or the requested result, etc., in the instruction sent. An indirect instruction can be understood as one in which the receiver determines the corresponding information based on the instruction sent by the sender, or makes a judgment and determines the operation to be performed or the requested result, etc., based on the judgment result.

[0044] It is worth noting that the technologies described in this application are 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 this application are often used interchangeably, and the described technologies can be used with the systems and radio technologies mentioned above, as well as with other systems and radio technologies. The following description describes New Radio (NR) systems for illustrative purposes, and the term NR is used in most of the following description; however, these technologies can also be applied to systems other than NR systems, such as 6th generation (6G) radio systems. th Generation 6G communication system.

[0045] Figure 1 shows a block diagram of a wireless communication system applicable to an embodiment of this application. The wireless communication system includes a terminal 11 and a network-side device 12. The terminal 11 can be a mobile phone, tablet computer, laptop computer, notebook computer, personal digital assistant (PDA), handheld computer, netbook, ultra-mobile personal computer (UMPC), mobile internet device (MID), augmented reality (AR), virtual reality (VR) device, robot, wearable device, flight vehicle, vehicle user equipment (VUE), shipboard equipment, pedestrian user equipment (PUE), smart home (home devices with wireless communication capabilities, such as refrigerators, televisions, washing machines, or furniture), game console, personal computer (PC), ATM, or self-service machine, etc. Wearable devices include: smartwatches, smart bracelets, smart earphones, smart glasses, smart jewelry (smart bracelets, smart chains, smart rings, smart necklaces, smart anklets, smart anklets, etc.), smart wristbands, smart clothing, etc. Among these, in-vehicle devices can also be referred to as in-vehicle terminals, in-vehicle controllers, in-vehicle modules, in-vehicle components, in-vehicle chips, or in-vehicle units, etc. It should be noted that the specific type of terminal 11 is not limited in the embodiments of this application.

[0046] Network-side equipment 12 may include access network equipment or core network equipment. Access network equipment may also be referred to as Radio Access Network (RAN) equipment, radio access network function, or radio access network unit. Access network equipment may include base stations, wireless local area network (WLAN) access points (APs), or wireless Fidelity (WiFi) nodes, etc. The term "base station" can be referred to as Node B (NB), Evolved Node B (eNB), Next Generation Node B (gNB), New Radio Node B (NR Node B), Access Point, Relay Base Station (RBS), Serving Base Station (SBS), Base Transceiver Station (BTS), Radio Base Station, Radio Transceiver, Basic Service Set (BSS), Extended Service Set (ESS), Home Node B (HNB), Home Evolved Node B, Transmission Reception Point (TRP), or any other suitable term in the relevant field, as long as the same technical effect is achieved. The term "base station" is not limited to any specific technical terminology. It should be noted that this application embodiment only uses a base station in an NR system as an example for description and does not limit the specific type of base station.

[0047] To facilitate understanding of the reference signal transmission method in the embodiments of this application, the following related content will be introduced first:

[0048] I. Aggregation Requirements for Discrete / Fragmented Spectrum

[0049] The sub-3GHz spectrum offers advantages such as wide coverage and low penetration loss, playing a crucial role in cellular network deployment due to its excellent coverage performance. However, compared to higher frequency bands, the sub-3GHz spectrum is fragmented and allocated to different wireless communication systems; furthermore, the spectrum available to mobile communication systems is further discretized or fragmented due to competition among mobile operators.

[0050] From the perspective of a single operator, almost all operators globally possess multiple Sub-3GHz frequency bands (e.g., 700 MHz, 800 MHz, 900 MHz, 1.4 GHz, 1.8 GHz, 2.1 GHz, 2.3 GHz, or 2.6 GHz bands). Currently, Carrier Aggregation (CA) / Dual-connectivity (DC) can aggregate multiple discrete or cross-band spectra to provide higher throughput performance for a single UE. However, CA / DA mechanisms introduce significant complexity and overhead on both the network and terminal sides. It is anticipated that if multiple discrete spectra can be aggregated into a single carrier or cell in a more efficient manner, the complexity and overhead on both sides can be significantly reduced; simultaneously, data transmission performance, such as throughput and latency, as well as operational flexibility, can also be improved.

[0051] In 5G mobile communication systems, enhanced technologies have been implemented for full-duplex frequency bands to adapt to diverse scenarios and service requirements. Key 5G scenarios include Enhanced Mobile Broadband (eMBB), Ultra Reliable & Low Latency Communication (URLLC), and Massive Machine Type Communication (mMTC). These scenarios place demands on the system to achieve high reliability, low latency, high bandwidth, and wide coverage.

[0052] In this paper, enhanced duplex, enhanced duplex mode, XDD, enhanced full duplex, enhanced full duplex mode, full duplex, and sub-band full duplex can represent a concept.

[0053] II. Synchronization Signal Block (SSB) in NR

[0054] In NR, the concept of SSB (i.e., SS / PBCH block) is introduced. A single SSB sent by the network side occupies 4 Orthogonal Frequency Division Multiplexing (OFDM) symbols in the time domain and 240 consecutive subcarriers (corresponding to 20 resource blocks) in the frequency domain. As shown in Figure 2, the SSB includes the Primary Synchronization Signal (PSS), the Secondary Synchronization Signal (SSS), and the Physical Broadcast Channel (PBCH). The PSS / SSS is mainly used by the terminal to obtain downlink synchronization, and the PBCH is mainly used by the terminal to obtain Master Information Block (MIB) information. SSB can be used for downlink synchronization and Radio Resource Management (RRM) measurements of connected / idle terminals, Radio Link Monitoring (RLM) / Beam Failure Detection (BFD) / Beam Failure Recovery (BFR) of connected terminals, and to assist connected terminals in uplink and downlink transmission and reception (e.g., downlink path loss measurement, analog beam determination / indication, etc.).

[0055] 3. As shown in Figure 3, SSBs corresponding to different beams / coverages can be further packaged into SSB sets (i.e., SS burst sets) and periodically transmitted by the network side. A single SSB set is limited to 5ms. The transmission period of an SSB set can be selected by the network side as needed, with a default of 20ms, a minimum of 5ms, and a maximum of 160ms.

[0056] IV. Beam Indication

[0057] For uplink beam indication, the base station indicates the beam direction to be used by the UE on uplink (UL) scheduling resources, and the beam direction is represented by the SRS resource indicator (SRI). For downlink beam indication, the base station indicates the beam direction on downlink (DL) scheduling resources so that the UE can determine its receiving beam. The downlink beam direction is indicated by the associated transmission configuration indication (TCI), where the TCI reflects information such as the Channel State Information Reference Signal Resource Indicator (CSI-RS) (CRI) and the SSB index.

[0058] The reference signal transmission method provided in this application will be described in detail below with reference to the accompanying drawings and through some embodiments and application scenarios.

[0059] Referring to Figure 4, an embodiment of this application provides a reference signal transmission method, which may include the following step 401:

[0060] Step 401: The communication device performs at least one of the following A-1 to A-3:

[0061] Item A-1: ​​Transmit a first reference signal in the first frequency domain cell of the first cell, and perform at least one of the following: do not transmit the first reference signal in the second frequency domain cell of the first cell, and transmit the second reference signal in the third frequency domain cell of the first cell in a first mode;

[0062] Item A-2: A third reference signal is transmitted on the fourth frequency domain unit of the first cell, and the third reference signal is triggered on demand; (that is, the transmission of the third reference signal on the fourth frequency domain unit is enabled when there is demand, and not enabled when there is no demand;) wherein, the on-demand triggering can be implemented by the network-side device or by the terminal request.

[0063] Item A-3: Transmit the fourth reference signal in the second mode on the fifth frequency domain cell of the first cell.

[0064] It should be noted that the frequency unit in this article may include at least one of the following: frequency band, frequency zone, sub-band, frequency part, frequency band part, frequency bandwidth part, and bandwidth part (BWP).

[0065] The reference signal in the text may include at least one of the following: SSB, SIB1, SS / PBCH block, object including at least part of the synchronization signal, object including at least part of the broadcast signal, synchronization signal, downlink reference signal, CSI-RS, tracking reference signal (Tracking RS, TRS), synchronization signal block, system information block, synchronization signal set, SSB burst, SSB, PBCH.

[0066] In this article, "cell" can also be replaced with one of the following: cell, cell group, frequency layer, tracking area (TA), transmit-receive point (TRP), network node, carrier, band, subband, bandwidth part (BWP).

[0067] The aforementioned first frequency domain unit, second frequency domain unit, third frequency domain unit, fourth frequency domain unit, and fifth frequency domain unit may each include one or more frequency domain units. Where each of the first, second, third, fourth, and fifth frequency domain units includes multiple frequency domain units, the first to fifth frequency domain units may be referred to sequentially as the first frequency domain unit subset, the second frequency domain unit subset, the third frequency domain unit subset, the fourth frequency domain unit subset, and the fifth frequency domain unit subset.

[0068] The first reference signal, the second reference signal, the third reference signal, and the fourth reference signal mentioned above may be the same or different.

[0069] For item A-1, when the communication equipment transmits the first reference signal on the first frequency domain cell of the first cell, the communication equipment may perform at least one of the following B-1 to B-2:

[0070] Item B-1: The first reference signal is not transmitted in the second frequency domain cell of the first cell;

[0071] Item B-2: Transmit the second reference signal in the first mode in the third frequency domain cell of the first cell.

[0072] It is understandable that if a communication device transmits a first reference signal on a first frequency domain unit of a first cell, but does not transmit the first reference signal on a second frequency domain unit of a second cell, then the communication device can perform at least one of uplink transmission and downlink transmission on the second frequency domain unit based on the first reference signal.

[0073] Optionally, in some embodiments, when the communication device transmits a first reference signal on a first frequency domain unit of the first cell, the communication device may also transmit a third reference signal triggered on demand on a fourth frequency domain unit of the first cell.

[0074] Among them, any two of the first frequency domain unit, second frequency domain unit, third frequency domain unit, fourth frequency domain unit, and fifth frequency domain unit may or may not have an intersection; or, it can be understood that any two of the first frequency domain unit, second frequency domain unit, third frequency domain unit, fourth frequency domain unit, and fifth frequency domain unit may or may not have an overlap.

[0075] For example, regarding items B-1 and B-2, the second frequency domain unit and the third frequency domain unit may have overlap (i.e., the frequency domain units included in the second frequency domain unit and the frequency domain units included in the third frequency domain unit are at least partially the same). In this case, it means that in the frequency domain units of the first cell, there are frequency domain units that do not transmit the first reference signal but transmit the second reference signal in the first mode; for example, the frequency band of the first cell includes frequency band-1 and frequency band-2, wherein the first reference signal is transmitted on frequency band-1, and the first reference signal is not transmitted on frequency band-2, but the second reference signal is transmitted in the first mode.

[0076] Alternatively, the second frequency domain unit and the third frequency domain unit may not overlap (i.e., the frequency domain units included in the second frequency domain unit and the frequency domain units included in the third frequency domain unit are different). In this case, it means that in the frequency domain units of the first cell, there is no frequency domain unit that does not transmit the first reference signal and transmits the second reference signal in the first mode; for example, the frequency band of the first cell includes frequency band-1 to frequency band-3, wherein the first reference signal is transmitted on frequency band-1, the first reference signal is not transmitted on frequency band-2, and the second reference signal is transmitted in the first mode on frequency band-3.

[0077] For example, regarding items B-1 and A-2, the second frequency domain unit and the fourth frequency domain unit may have overlap (i.e., the frequency domain units included in the second frequency domain unit and the frequency domain units included in the fourth frequency domain unit are at least partially the same). In this case, it means that in the frequency domain units of the first cell, there are frequency domain units that do not transmit the first reference signal but transmit the third reference signal triggered on demand; for example, the frequency band of the first cell includes frequency band-1 and frequency band-2, wherein the first reference signal is transmitted on frequency band-1, and the first reference signal is not transmitted on frequency band-2, but the third reference signal triggered on demand is transmitted.

[0078] Alternatively, the second frequency domain unit and the fourth frequency domain unit may not overlap (i.e., the frequency domain units included in the second frequency domain unit and the frequency domain units included in the fourth frequency domain unit are different). In this case, it means that in the frequency domain units of the first cell, there is no frequency domain unit that does not transmit the first reference signal but transmits the third reference signal that is triggered on demand; for example, the frequency band of the first cell includes frequency band-1 to frequency band-3, wherein the first reference signal is transmitted on frequency band-1, the first reference signal is not transmitted on frequency band-2, and the third reference signal that is triggered on demand is transmitted on frequency band-3.

[0079] For example, regarding items B-2 and A-2, the third frequency domain unit and the fourth frequency domain unit may have overlap (i.e., the frequency domain units included in the third frequency domain unit and the frequency domain units included in the fourth frequency domain unit are at least partially the same). In this case, it means that in the frequency domain units of the first cell, there exists a frequency domain unit that transmits the second reference signal in the first mode and transmits the third reference signal triggered on demand; for example, the frequency band of the first cell includes frequency band-1 and frequency band-2, wherein the first reference signal is transmitted on frequency band-1, and the second reference signal is transmitted in the first mode and the third reference signal is triggered on demand on frequency band-2.

[0080] Alternatively, the third frequency domain unit and the fourth frequency domain unit may not overlap (i.e., the frequency domain units included in the third frequency domain unit and the frequency domain units included in the fourth frequency domain unit are different). In this case, it means that there is no frequency domain unit in the frequency domain units of the first cell that transmits the second reference signal in the first mode and transmits the third reference signal triggered on demand. For example, the frequency band of the first cell includes frequency band-1 to frequency band-3, wherein the first reference signal is transmitted on frequency band-1, the second reference signal is transmitted in the first mode on frequency band-2, and the third reference signal is transmitted on demand on frequency band-3.

[0081] For example, regarding items A-2 and A-3, the fourth frequency domain unit and the fifth frequency domain unit may have overlap (i.e., the frequency domain units included in the fourth frequency domain unit and the frequency domain units included in the fifth frequency domain unit are at least partially the same). In this case, it means that in the frequency domain units of the first cell, there exists a frequency domain unit that transmits the third reference signal triggered on demand and transmits the fourth reference signal in the second mode; for example, the frequency band of the first cell includes frequency band-1 and frequency band-2, wherein the third reference signal triggered on demand is transmitted on frequency band-2 and the fourth reference signal is transmitted in the second mode.

[0082] Alternatively, the fourth and fifth frequency domain units may not overlap (i.e., the frequency domain units included in the fourth and fifth frequency domain units are different). In this case, it means that there is no frequency domain unit in the first cell that transmits the third reference signal triggered on demand and transmits the fourth reference signal in the second mode. For example, the frequency band of the first cell includes frequency band-1 to frequency band-2, where the fourth reference signal is transmitted in the second mode on frequency band-1 and the third reference signal triggered on demand is transmitted on frequency band-2.

[0083] Optionally, the communication device may perform at least one of B-1 to B-2 above if a predetermined condition is met; wherein the predetermined condition is used to indicate that at least one of the second frequency domain unit and the third frequency domain unit, together with the first frequency domain unit, meets a corresponding threshold requirement in at least one transmission parameter.

[0084] Furthermore, when the communication device is a network-side device, the "transmission" in step 401 above specifically means: sending; when the communication device is a terminal, the "transmission" in step 401 above specifically means: receiving.

[0085] As can be seen from step 401 above, in this embodiment of the application, the communication device can transmit the first reference signal on the first frequency domain unit of the first cell, but does not transmit the first reference signal on the second frequency domain unit, thereby reducing the transmission of the reference signal on the frequency domain unit of the first cell, and thus reducing the power consumption of the communication device in transmitting the reference signal.

[0086] The communication equipment can also transmit a second reference signal in a first mode in a third frequency domain unit while transmitting a first reference signal in a first frequency domain unit in a first cell. In this way, based on transmitting the first reference signal in the first frequency domain unit, by transmitting a second reference signal that satisfies the specific first mode in the third frequency domain unit, the requirement to reduce the power consumption of parameter signal transmission can be met to a certain extent.

[0087] The communication equipment can also transmit a third reference signal on the fourth frequency domain unit. This third reference signal is triggered on demand, which allows for flexible activation of reference signal transmission on certain frequency domain units as needed according to service requirements. This reduces the power consumption of the equipment transmitting the reference signal and provides accurate synchronization and AGC for the equipment to access the network.

[0088] The communication device can also transmit the fourth reference signal in the second mode on the fifth frequency domain unit. In this way, by transmitting the fourth reference signal that satisfies the specific second mode on the fifth frequency domain unit, the requirement to reduce the power consumption of parameter signal transmission can be met to a certain extent.

[0089] Therefore, compared with existing related technologies, in which reference signals are periodically transmitted in each frequency domain unit of a single cell, the embodiments of this application can reduce the transmission power consumption of reference signals in the scenario of multiple frequency domain units in a single cell.

[0090] Optionally, if the first condition is met, the communication device does not transmit the first reference signal in the second frequency domain unit;

[0091] The first condition includes at least one of the following C-1 to C-3:

[0092] C-1: The deviation between the transmission timing of the first frequency domain unit and the transmission timing of the second frequency domain unit is less than or equal to the first threshold;

[0093] Transmission timing can also be referred to as transmission delay, timing interval, or timing deviation, among other things.

[0094] C-2: The frequency domain interval between the first frequency domain unit and the second frequency domain unit is less than or equal to the second threshold;

[0095] The frequency domain spacing between the first frequency domain unit and the second frequency domain unit may include at least one of the following: the frequency domain spacing between the center frequencies of the first frequency domain unit and the second frequency domain unit, the frequency domain spacing between the starting positions of the first frequency domain unit and the second frequency domain unit, and the frequency domain spacing between the ending positions of the first frequency domain unit and the second frequency domain unit.

[0096] In addition, at least one of the first threshold and the second threshold may be related to the subcarrier spacing (SCS). For example, at least one of the first threshold and the second threshold may be determined based on at least one of the following: the SCS of the first frequency domain unit, the SCS of the second frequency domain unit, the reference SCS configured by the network-side equipment, the maximum SCS of all frequency domain units of the first cell, the minimum SCS of all frequency domain units of the first cell, the maximum SCS of the first frequency domain unit, the minimum SCS of the first frequency domain unit, the maximum SCS of the second frequency domain unit, and the minimum SCS of the second frequency domain unit.

[0097] Alternatively, at least one of the first and second thresholds can be the length of k1 cyclic prefixes (CP), where k1 is greater than or equal to 1; or at least one of the first and second thresholds can be a predefined time.

[0098] C-3: The deviation between the signal quality of the first frequency domain unit and the signal quality of the second frequency domain unit is less than or equal to the third threshold.

[0099] Optionally, the signal quality strength of the first frequency domain unit can be the signal strength measured based on a reference signal (such as a synchronization signal). Optionally, the signal quality strength of the second frequency domain unit can be the signal strength measured based on a reference signal, such as CSI-RS / Tracking Reference Signal (TRS). Optionally, the signal quality of the first and second frequency domain units can be the signal strength after automatic gain control (AGC).

[0100] As can be seen from the above, when the first action includes the second frequency domain cell of the first cell not transmitting the first reference signal, the above-mentioned predetermined conditions may include the first condition described herein.

[0101] Optionally, if the second condition is met, the communication device transmits the second reference signal in a first mode on the third frequency domain unit;

[0102] The second condition includes at least one of the following D-1 to D-3:

[0103] Item D-1: The deviation between the transmission timing of the first frequency domain unit and the transmission timing of the third frequency domain unit is less than or equal to the fourth threshold; wherein, the transmission timing may also be referred to as one of the following: transmission delay, timing interval, timing deviation.

[0104] D-2: The frequency domain interval between the first frequency domain unit and the third frequency domain unit is less than or equal to the fifth threshold;

[0105] The frequency domain spacing between the first frequency domain unit and the third frequency domain unit may include at least one of the following: the frequency domain spacing between the center frequencies of the first frequency domain unit and the third frequency domain unit, the frequency domain spacing between the starting positions of the first frequency domain unit and the third frequency domain unit, and the frequency domain spacing between the ending positions of the first frequency domain unit and the third frequency domain unit.

[0106] In addition, at least one of the fourth and fifth thresholds may be related to the subcarrier spacing (SCS). For example, at least one of the fourth and fifth thresholds may be determined based on at least one of the following: the SCS of the first frequency domain unit, the SCS of the third frequency domain unit, the reference SCS configured by the network-side equipment, the maximum SCS of all frequency domain units of the first cell, the minimum SCS of all frequency domain units of the first cell, the maximum SCS of the first frequency domain unit, the minimum SCS of the first frequency domain unit, the maximum SCS of the third frequency domain unit, and the minimum SCS of the third frequency domain unit.

[0107] Alternatively, at least one of the fourth and fifth thresholds can be the length of k2 CPs, where k2 is greater than or equal to 1; or at least one of the fourth and fifth thresholds can be a predefined time.

[0108] Item D-3: The deviation between the signal quality of the first frequency domain unit and the signal quality of the third frequency domain unit is less than or equal to the sixth threshold.

[0109] Optionally, the signal quality strength of the first frequency domain unit can be the signal strength measured based on a reference signal (such as a synchronization signal). Optionally, the signal quality strength of the third frequency domain unit can be the signal strength measured based on a reference signal, such as CSI-RS / TRS. Optionally, the signal quality of the first frequency domain unit and the signal quality of the third frequency domain unit can be the signal strength after AGC.

[0110] Optionally, the second condition further includes:

[0111] The reference source (e.g., reference resource, reference RS) of the second reference signal transmitted in the third frequency domain unit is associated with the common reference signal of the first frequency domain unit. This association can be based on spatial characteristics; for example, the spatial characteristics of the reference source of the second reference signal transmitted in the third frequency domain unit may be the same as the spatial characteristics of the common reference signal of the first frequency domain unit. Alternatively, this association can be configured by network-side equipment.

[0112] It should be noted that spatial characteristics can also be expressed as at least one of the following: beam direction, beam, quasi co-location (QCL), QCL source spatial attributes, spatial characteristics, TCI, TCI state, TRP, reference signal (RS), reference signal number, SSB, SSB number, and panel.

[0113] As can be seen from the above, when the first action includes transmitting the second reference signal in the third frequency domain cell of the first cell in the first mode, the predetermined conditions may include the second conditions described herein.

[0114] Furthermore, when multiple frequency domain units are enabled in a single-cell, multi-frequency-domain-unit scenario, network-side devices can reduce the transmission of reference signals on some frequency domain units to minimize the transmission of reference signals. However, if the terminal receives or transmits signals on frequency domain units that do not transmit reference signals, problems such as inaccurate synchronization, inaccurate AGC adjustment, and inability to obtain optimal spatial characteristics may occur. In some embodiments of this application, the conditions for multiple frequency domain units to share reference signals are predefined through the aforementioned first and second conditions. This allows network-side devices to flexibly enable or disable reference signal transmission on certain frequency domain units according to the deployment situation, thereby better reducing network energy consumption while ensuring accurate synchronization and AGC of the accessed terminals and maintaining good QCL.

[0115] Optionally, the second reference signal transmitted in the first mode has at least some of the same transmission parameters as the first reference signal; or the second reference signal transmitted in the first mode has at least some of the different transmission parameters than the first reference signal. The transmission parameters may include at least one of the following: frequency domain units, time domain units, period, quantity, and transmit power. It is understood that if at least some frequency domain units are the same, it can be interpreted as frequency domain overlap; conversely, if the frequency domain units are different, it can be interpreted as non-overlapping in the frequency domain.

[0116] The time-domain unit may include at least one of the following: slot, symbol, subframe, mini-slot.

[0117] Therefore, the second reference signal can satisfy at least one of the following:

[0118] The second reference signal and the first reference signal may overlap or not overlap in the frequency domain (e.g., the second reference signal may be on a synchronous grid or a asynchronous grid);

[0119] The second reference signal may or may not overlap with the first reference signal in the time domain;

[0120] The period of the second reference signal may be the same as or different from that of the first reference signal;

[0121] The number of the second reference signal may be the same as or different from that of the first reference signal;

[0122] The second reference signal may have the same or different transmission power as the first reference signal.

[0123] For example, in some embodiments, the second reference signal transmitted in the first mode satisfies at least one of the following: the transmission period is greater than or equal to N1, and the quantity is less than or equal to M1. It should be noted that the first mode can also be called an energy-saving mode.

[0124] For example, when the second reference signal is transmitted in the first mode, the period of the second reference signal is greater than the period of the first reference signal, or the number of times the second reference signal is transmitted in one period is less than the corresponding number of times the first reference signal is transmitted; or, the transmission power of the second reference signal is less than the transmission power of the first reference signal.

[0125] Optionally, the method further includes:

[0126] The communication device transmits first indication information;

[0127] The first indication information is used to indicate at least one of the following:

[0128] Whether the second frequency domain unit transmits a reference signal; (It should be noted that the reference signal here may include at least one of the first reference signal, the second reference signal, and the third reference signal;)

[0129] The frequency domain cell in the first cell that transmits the reference signal;

[0130] The first cell does not have a frequency domain cell that transmits a reference signal;

[0131] The transmission mode of the reference signal on the frequency domain unit of the first cell includes at least one of the following: normal mode, energy-saving mode, and on-demand transmission mode, wherein the transmission period of the energy-saving mode is greater than or equal to N1 and the number of signals is less than or equal to M1; the transmission period of the normal mode is less than N2 and the number of signals is greater than M.

[0132] Optionally, the first indication information is further used to indicate at least one of the following:

[0133] Does the second frequency domain unit transmit the first reference signal?

[0134] The frequency domain cell in the first cell that transmits the first reference signal;

[0135] The frequency domain cells of the first cell do not transmit the frequency domain cells of the first reference signal;

[0136] The frequency domain unit in the first cell that transmits the first reference signal, and the method of transmitting the first reference signal.

[0137] Optionally, the first indication information is carried in at least one of the following:

[0138] The first reference signal, paging information, and system message.

[0139] The paging information may be paging information transmitted on the first frequency domain unit; the paging information may include downlink control information (DCI) and paging message.

[0140] In addition, when the communication device is a network-side device, the communication device transmits the first indication information, specifically: the network-side device sends the first indication information; when the communication device is a terminal, the communication device transmits the first indication information, specifically: the terminal receives the first indication information.

[0141] Therefore, when multiple frequency domain units are enabled in a single-cell, multi-frequency-domain-unit scenario, the network-side device can reduce the transmission of reference signals on some frequency domain units in order to reduce the transmission of reference signals on multiple frequency domain units. However, the network-side device can enable the transmission of reference signals on these frequency domain units according to the actual situation. In this case, the network-side device can send the aforementioned first indication information to inform the terminal (including the terminal that initially accesses the network) which frequency domain units have enabled the transmission of reference signals.

[0142] Optionally, if the third condition is met, the communication device transmits the third reference signal on the fourth frequency domain unit; wherein the third condition includes at least one of the following E-1 to E-6:

[0143] E-1: The deviation between the transmission timing of the first frequency domain unit and the transmission timing of the fourth frequency domain unit is greater than or equal to the seventh threshold; wherein, the transmission timing may also be referred to as one of the following: transmission delay, timing interval, timing deviation.

[0144] E-2: The frequency domain interval between the first frequency domain unit and the fourth frequency domain unit is greater than or equal to the eighth threshold;

[0145] The frequency domain spacing between the first frequency domain unit and the fourth frequency domain unit may include at least one of the following: the frequency domain spacing between the center frequencies of the first frequency domain unit and the fourth frequency domain unit, the frequency domain spacing between the starting positions of the first frequency domain unit and the fourth frequency domain unit, and the frequency domain spacing between the ending positions of the first frequency domain unit and the fourth frequency domain unit.

[0146] In addition, at least one of the seventh and eighth thresholds may be related to the SCS. For example, at least one of the seventh and eighth thresholds may be determined based on at least one of the following: the SCS of the first frequency domain unit, the SCS of the fourth frequency domain unit, the reference SCS configured by the network-side equipment, the maximum SCS of all frequency domain units of the first cell, the minimum SCS of all frequency domain units of the first cell, the maximum SCS of the first frequency domain unit, the minimum SCS of the first frequency domain unit, the maximum SCS of the fourth frequency domain unit, and the minimum SCS of the fourth frequency domain unit.

[0147] Alternatively, at least one of the seventh and eighth thresholds can be the length of k3 CPs, where k3 is greater than or equal to 1; or at least one of the seventh and eighth thresholds can be a predefined time.

[0148] E-3: The signal quality of the fourth frequency domain unit is less than or equal to the ninth threshold;

[0149] Optionally, the signal quality strength of the fourth frequency domain unit can be the signal strength measured based on a reference signal (such as a synchronization signal).

[0150] It should be noted that in item E-3, the signal strength of all frequency domain units included in the fourth frequency domain unit is less than or equal to the ninth threshold, or the signal strength of some frequency domain units included in the fourth frequency domain unit is less than or equal to the ninth threshold.

[0151] E-4: First service arrives; where the first service can be a pre-determined specific service; for example, the first service may include at least one of the following: uplink service, service corresponding to uplink data, downlink service, service corresponding to downlink data, specific type of service (such as service with high time domain requirements, service with high reliability requirements, etc.)

[0152] E-5: At least some of the communication devices corresponding to the fourth frequency domain unit undergo beam switching;

[0153] E-6: The signal quality of the fourth frequency domain unit is less than or equal to the tenth threshold.

[0154] Regarding the scheme of transmitting on-demand triggered third reference signals on the fourth frequency domain unit, it should be noted that when multiple frequency domain units are enabled in a single-cell, multi-frequency-domain-unit scenario, the network-side equipment can reduce the transmission of reference signals on some frequency bands to reduce the transmission of reference signals in multiple frequency domain units. However, if the terminal receives or transmits signals on frequency domain resources where no reference signals are transmitted, problems such as inaccurate synchronization, inaccurate AGC adjustment, and inability to obtain optimal spatial characteristics may occur, resulting in a decrease in transmission performance. In some embodiments of this application, by on-demand triggering the transmission of reference signals on multiple frequency domain units where no synchronization signals are transmitted, the network-side equipment can flexibly enable the transmission of reference signals on certain frequency domain units as needed according to service requirements, providing accurate synchronization and AGC for terminal access.

[0155] Optionally, the method further includes:

[0156] When the communication device is a first communication device, the first communication device transmits second indication information;

[0157] or,

[0158] When the communication device is a second communication device, the second communication device transmits an uplink request signal;

[0159] The second indication information is used to indicate that the third reference signal is transmitted on at least one frequency domain unit included in the fourth frequency domain unit;

[0160] The uplink request signal is used to request the transmission of the third reference signal on at least one frequency domain unit included in the fourth frequency domain unit.

[0161] In some embodiments, the first communication device may be a network-side device. The network-side device may then send the aforementioned second indication information to the terminal, informing the terminal to transmit a third reference signal on at least one frequency unit included in the fourth frequency unit. That is, the network-side device may send triggering indication information (i.e., the second indication information) for the on-demand transmission of the third reference signal. For the terminal, after receiving the triggering indication information from the network-side device, the terminal may receive the third reference signal on the frequency unit indicated by the triggering indication information.

[0162] In some embodiments, the second communication device can be a terminal. The terminal can then send the aforementioned uplink request signal to the network-side device to request the network-side device to transmit a third reference signal in at least one frequency domain unit included in the fourth frequency domain unit. That is, after receiving the uplink request signal, the network-side device can transmit the third reference signal in the frequency domain unit indicated by the uplink request signal, and the terminal can receive the third reference signal in the frequency domain unit indicated by the uplink request signal.

[0163] Optionally, the second indication information is also used to indicate the third reference signal transmission parameters; the transmission parameters may include at least one of the following: transmission period, transmission duration, frequency point, number, transmission power, reference signal source, and the starting position of the transmission time window.

[0164] Therefore, when the second indication information is used to indicate the transmission parameters of the third reference signal, the communication device can adjust the reference signal by transmitting the second indication information. For example, it can adjust the transmission period, such as from a long period to a short period, or switch from a short period to a long period; or it can adjust the time domain position, such as transmitting the reference signal at a specific time domain position; or it can adjust the frequency domain position, such as transmitting the reference signal at a specific frequency domain position.

[0165] Understandably, the transmission parameters of the third reference signal can also be configured in advance via Radio Resource Control (RRC) signaling.

[0166] Optionally, the first communication device transmits the second indication information, including:

[0167] The first communication device transmits the second indication information in at least one of the following ways:

[0168] The first frequency domain unit, the second frequency domain unit, the third frequency domain unit, the fourth frequency domain unit, and the fifth frequency domain unit.

[0169] In some embodiments, the communication device may transmit second indication information on the first frequency domain unit;

[0170] Alternatively, the second indication information can be transmitted on a first specific frequency domain unit included in the fourth frequency domain unit. The first specific frequency domain unit is the frequency domain unit indicated by the second indication information for transmitting the third reference signal. For example, the fourth frequency domain unit includes frequency bands -1 to -4, wherein the second indication information indicates that the third reference signal is transmitted on frequency bands -1 and -2. Then, the second indication information can be transmitted on at least one of frequency bands -1 and -2.

[0171] Alternatively, the second indication information may be transmitted over any frequency domain unit included in the fourth frequency domain unit.

[0172] Optionally, the second communication device transmits the uplink request signal, including:

[0173] The second communication device transmits the uplink request signal in at least one of the following ways:

[0174] The first frequency domain unit, the second frequency domain unit, the third frequency domain unit, the fourth frequency domain unit, and the fifth frequency domain unit.

[0175] In some embodiments, the communication device may transmit an uplink request signal on a first frequency domain unit;

[0176] Alternatively, the uplink request signal can be transmitted on a second specific frequency domain unit included in the fourth frequency domain unit. The second specific frequency domain unit is the frequency domain unit where the third reference signal requested by the uplink request signal is located. For example, the fourth frequency domain unit includes frequency bands -1 to -4. If the uplink request signal requests the transmission of the third reference signal on frequency bands -1 and -2, then the uplink request signal can be transmitted on at least one of frequency bands -1 and -2.

[0177] Alternatively, an uplink request signal may be transmitted on any frequency domain unit included in the fourth frequency domain unit.

[0178] Optionally, the method further includes at least one of the following F-1 to F-3:

[0179] Item F-1: The communication device transmits random access messages on at least one of the first frequency domain unit and the sixth frequency domain unit, wherein the sixth frequency domain unit includes at least one of the following: the second frequency domain unit, the third frequency domain unit, the fourth frequency domain unit, and the fifth frequency domain unit;

[0180] Item F-2: The communication device transmits third indication information, which is used to transmit random access messages on at least one of the first frequency domain unit and the sixth frequency domain unit;

[0181] The third indication information may be carried in at least one of the following: Msg2, MsgB, Msg2 PDCCH, Msg2 PDSCH, MsgB PDCCH, MsgB PDSCH, Msg4 PDCCH, and Msg4 PDSCH.

[0182] Item F-3: The communication device transmits paging messages in at least one of the first frequency domain unit and the sixth frequency domain unit.

[0183] The following points should be noted regarding F-1 and F-2:

[0184] 1. Optionally, the random access message may include at least one of the following: random access request message (Msg1), message A (MsgA), random access response (Msg2), message B (MsgB), uplink transmission message (Msg3), contention resolution message (Msg4), Msg4 Physical Uplink Control Channel (PUCCH) (i.e., feedback information of Msg4), and MsgB PUCCH (i.e., feedback information of MsgB).

[0185] 2. The following examples illustrate the transmission of the various random access messages mentioned above:

[0186] Regarding Msg1 and MsgA: the terminal may transmit at least one of Msg1 and MsgA on the first frequency domain unit; or, transmit at least one of Msg1 and MsgA on the sixth frequency domain unit.

[0187] Regarding Msg2 and MsgB: the terminal may receive at least one of Msg2 and MsgB in the first frequency domain unit; or, receive at least one of Msg2 and MsgB in the aforementioned sixth frequency domain unit; or, the terminal may instruct itself to receive at least one of Msg2 and MsgB in the first frequency domain unit; or, the terminal may instruct itself to receive at least one of Msg2 and MsgB in the sixth frequency domain unit.

[0188] Regarding Msg3: The terminal may transmit Msg3 on the first frequency domain unit; or, transmit Msg3 on the aforementioned sixth frequency domain unit; or, the network-side device may instruct itself to receive Msg3 on the first frequency domain unit in at least one of the Msg2 Physical Downlink Control Channel (PDCCH), Msg2 PDSCH, MsgB PDCCH, and MsgB Physical Downlink Shared Channel (PDSCH); or, the network-side device may instruct itself to receive Msg3 on the sixth frequency domain unit in at least one of the Msg2 PDCCH, Msg2 PDSCH, MsgB PDCCH, and MsgB PDSCH.

[0189] Regarding Msg4: the terminal may receive Msg4 on the first frequency domain unit; or, receive Msg4 on the sixth frequency domain unit; or, the network-side device may instruct itself to transmit Msg4 on the first frequency domain unit in at least one of Msg2 PDCCH, Msg2 PDSCH, MsgB PDCCH, and MsgB PDSCH; or, the network-side device may instruct itself to transmit Msg4 on the sixth frequency domain unit in at least one of Msg2 PDCCH, Msg2 PDSCH, MsgB PDCCH, and MsgB PDSCH.

[0190] Regarding Msg4 PUCCH and MsgB PUCCH: The terminal may transmit at least one of Msg4 PUCCH and MsgB PUCCH on the first frequency domain unit; or, transmit at least one of Msg4 PUCCH and MsgB PUCCH on the sixth frequency domain unit; or, the network-side device may indicate, through at least one of Msg4 PDCCH, Msg4 PDSCH, MsgB PDCCH, and MsgB PDSCH, that it receives at least one of Msg4 PUCCH and MsgB PUCCH on its first frequency domain unit; or, the network-side device may indicate, through at least one of Msg4 PDCCH, Msg4 PDSCH, MsgB PDCCH, and MsgB PDSCH, that it receives at least one of Msg4 PUCCH and MsgB PUCCH on its sixth frequency domain unit.

[0191] 3. To better understand the transmission of the random access messages described above, the following example illustrates the transmission flow of relevant random access messages during a random access process:

[0192] In the first example, all random access messages are transmitted on the first frequency domain unit, and the specific process includes the following steps 1.1 to 1.7:

[0193] Step 1.1: Business arrives;

[0194] Step 1.2: The terminal sends Msg1 on the first frequency domain unit;

[0195] Step 1.3: The terminal receives Msg2 in the first frequency domain unit;

[0196] Step 1.4: The terminal sends Msg3 on the first frequency domain unit;

[0197] Step 1.5: The terminal receives Msg4 in the first frequency domain unit;

[0198] Step 1.6: The terminal sends msg4 PUCCH on the first frequency domain unit to complete the RRC connection establishment;

[0199] Step 1.7: Network-side devices can schedule services to the first or sixth frequency domain unit.

[0200] It should be noted that network-side devices may need to transmit reference signals (such as uplink or downlink reference signals) on the sixth frequency domain unit first, so that the terminal can obtain accurate timing information, and then schedule the service to the sixth frequency domain unit.

[0201] In the second example, all random access messages are transmitted on the sixth frequency domain unit, and the specific process includes the following steps 2.1 to 2.7:

[0202] Step 2.1: Transaction arrives;

[0203] Step 2.2: The terminal transmits Msg1 on the sixth frequency domain unit;

[0204] Step 2.3: The terminal receives Msg2 in the sixth frequency domain unit;

[0205] Step 2.4: The terminal transmits Msg3 on the sixth frequency domain unit;

[0206] Step 2.5: The terminal receives Msg4 in the sixth frequency domain unit;

[0207] Step 2.6: The terminal sends msg4 PUCCH on the sixth frequency domain unit to complete the RRC connection establishment;

[0208] Step 2.7: Network-side devices can schedule services to the sixth frequency domain unit.

[0209] In the third example, Msg1 and Msg2 are transmitted on the first frequency domain unit. After obtaining preliminary timing information, RACH is subsequently transmitted on the sixth frequency domain unit. This process can guarantee the performance of Msg1 and Msg2 and reduce the load on the transmission of Msg3 / Msg4 on the first frequency domain unit. The specific process includes the following steps 3.1 to 3.7:

[0210] Step 3.1: Business arrives;

[0211] Step 3.2: The terminal sends Msg1 on the first frequency domain unit;

[0212] Step 3.3: The terminal receives Msg2 in the first frequency domain unit and obtains the frequency domain information and uplink timing information of the sixth frequency domain unit;

[0213] Step 3.4: The terminal transmits Msg3 on the sixth frequency domain unit;

[0214] Step 3.5: The terminal receives Msg4 in the sixth frequency domain unit;

[0215] Step 3.6: The terminal sends msg4 PUCCH on the sixth frequency domain unit to complete the RRC connection establishment;

[0216] Step 3.7: Network-side devices can schedule services to the sixth frequency domain unit.

[0217] In the fourth example, Msg1 is transmitted on the sixth frequency domain unit, and Msg2 is transmitted on the first frequency domain unit. After obtaining preliminary timing information, subsequent RACH transmissions are performed on the sixth frequency domain unit. This process can reduce the load on the transmission of Msg1 / Msg3 / Msg4 on the first frequency domain unit, ensuring the performance of Msg2. The specific process includes the following steps 4.1 to 4.7:

[0218] Step 4.1: Business arrives;

[0219] Step 4.2: The terminal transmits Msg1 on the sixth frequency domain unit;

[0220] Step 4.3: The terminal receives Msg2 in the first frequency domain unit and obtains the frequency domain information and uplink timing information of the sixth frequency domain unit;

[0221] Step 4.4: The terminal transmits Msg3 on the sixth frequency domain unit;

[0222] Step 4.5: The terminal receives Msg4 in the sixth frequency domain unit;

[0223] Step 4.6: The terminal sends msg4 PUCCH on the sixth frequency domain unit to complete the RRC connection establishment;

[0224] Step 4.7: Network-side devices can schedule services to the sixth frequency domain unit.

[0225] 4. When multiple frequency domain units are enabled in a single-cell, multi-frequency-domain-unit scenario, the network-side equipment can reduce the transmission of reference signals on some frequency domain units to reduce the transmission of reference signals. However, it is also necessary to address issues such as how to ensure the performance of random access, reduce the latency of the random access process, and ensure load balancing when the terminal initiates random access. In some embodiments of this application, by using at least one of items F-1 and F-2 above, random access transmission can be flexibly performed according to service or load conditions (i.e., flexibly selecting the frequency domain unit for transmitting random access messages), ensuring the performance of random access, reducing the latency of the random access process, and balancing the load among multiple frequency domain units.

[0226] Regarding item F-3: In some embodiments, the terminal may receive paging messages on at least one of the first frequency domain unit and the sixth frequency domain unit. In some embodiments, the network-side device may send paging messages on at least one of the first frequency domain unit and the sixth frequency domain unit.

[0227] Optionally, the random access resources of the sixth frequency domain unit satisfy at least one of the following G-1 to G-6;

[0228] Item G-1: The random access resources of the sixth frequency domain unit are indicated by a system message transmitted on the first frequency domain unit; the system message may include, for example, SIB1.

[0229] Item G-2: The random access resources of the sixth frequency domain unit are indicated by system messages transmitted on the sixth frequency domain unit; such system messages may include, for example, at least some of the SIBs other than SIB1.

[0230] Item G-3: The random access resources of each frequency domain unit in the sixth frequency domain unit are associated with the first reference signal transmitted on a frequency domain unit in the first frequency domain unit;

[0231] For example, the sixth frequency domain unit includes frequency domain units A1 and A2, and the first frequency domain unit includes frequency domain units B1 and B2. Then, the RACH resource of frequency domain unit A1 can be associated with the first reference signal transmitted on frequency domain unit B1, and the RACH resource of frequency domain unit A2 can be associated with the first reference signal transmitted on frequency domain unit B2.

[0232] Item G-4: The random access resources of multiple frequency domain units in the sixth frequency domain unit are associated with the first reference signal transmitted on one of the frequency domain units in the first frequency domain unit;

[0233] For example, if the sixth frequency domain unit includes frequency domain units A1 and A2, and the first frequency domain unit includes frequency domain units B1 and B2, then the RACH resources of frequency domain unit A1 and frequency domain unit A2 can be associated with the first reference signal transmitted on frequency domain unit B1.

[0234] Item G-5: The independent numbering of the random access resources of each frequency domain unit in the sixth frequency domain unit; wherein, the independent numbering refers to the numbering of the N4 RACH resources of frequency domain unit 1 from 0 to N4-1 (or 1 to N); and the numbering of the N5 RACH resources of frequency domain unit 2 from 0 to N5-1 (or 1 to N5);

[0235] Item G-6: Joint numbering of random access resources in each frequency unit within the sixth frequency unit; that is, for the RACH resources of each frequency unit included in the sixth frequency unit, joint numbering can be performed in a time-domain-first, frequency-domain-second manner (i.e., for these RACH resources, they can be sorted first in time-domain order, then in frequency-domain order, and numbered based on the final sorting); or, joint numbering can be performed in a frequency-domain-first, time-domain-second manner (i.e., for these RACH resources, they can be sorted first in frequency-domain order, then in time-domain order, and numbered based on the final sorting). For example, joint numbering of N4 RACH resources on frequency unit 1 and N5 RACH resources on frequency unit 2 can be performed by numbering them together according to the frequency-domain order and time-domain order of the RACH resources, and the numbering can be from 0 to N4+N5-1 (or 1 to N4+N5).

[0236] Optionally, the method further includes one of the following H-1 to H-5:

[0237] H-1: The communication device searches for a reference signal in the first frequency domain unit but not in the seventh frequency domain unit, wherein the seventh frequency domain unit includes at least one of the second and third frequency domain units; furthermore, the frequency point or frequency domain information of the first frequency domain unit may be predefined, such as a synchronization grid within a specific range; the frequency point or frequency domain information of the seventh frequency domain unit may be predefined and not within a predefined frequency range or synchronization grid range.

[0238] As can be seen from term H-1, the communication device can search for the reference signal only in the first frequency domain unit.

[0239] For example, when the network-side device transmits a first reference signal on a first frequency domain unit, does not transmit a second reference signal on a second frequency domain unit, or transmits a second reference signal in a first mode on a third frequency domain unit, the terminal can search for the reference signal only on the first frequency domain unit.

[0240] H-2: The communication device first searches for a reference signal in the first frequency domain unit, and searches for a reference signal in the seventh frequency domain unit if the fourth condition is met;

[0241] For example, when a network-side device transmits a first reference signal in a first frequency domain unit and a second reference signal in a first mode in a third frequency domain unit, the terminal may prioritize searching for a reference signal in the first frequency domain unit, and only search for a reference signal in the third frequency domain unit if a fourth condition is met.

[0242] Optionally, the fourth condition includes at least one of the following:

[0243] No reference signal was found in the first frequency domain unit;

[0244] The signal strength of the reference signal searched in the first frequency domain unit is less than or equal to the eleventh threshold;

[0245] The communication device does not belong to the device types that are allowed to be accessed by the first frequency domain unit;

[0246] The first reference signal transmitted on the first frequency domain unit carries a predetermined indication.

[0247] The predetermined indication is used to instruct the search for a reference signal on the seventh frequency domain unit. In some embodiments, the specific indication may indicate that one or more frequency points or frequency domain information correspond to at least one frequency domain unit included in the seventh frequency domain unit, and the terminal searches for the reference signal corresponding to the seventh frequency domain unit on the corresponding frequency point based on the indication.

[0248] In addition, the types of devices that can be accessed by the first frequency domain unit can be carried in the synchronization information (including at least one of MIB and SIB); the types of devices that can be accessed by the first frequency domain unit can be different from the types of devices that can be accessed by the seventh frequency domain unit; the device type can be determined based on at least one of the following: device capability information, device characteristic information, device power level, energy consumption level, and energy source.

[0249] H-3: The communication device searches for a reference signal in the first frequency domain unit;

[0250] H-4: The communication device searches for a reference signal on the seventh frequency domain unit; in this case, if the terminal does not find a reference signal on the seventh frequency domain unit, it can search for a first reference signal based on predefined frequency domain information (such as information of the first frequency domain unit).

[0251] For example, when a network-side device transmits a first reference signal in a first frequency domain unit and a second reference signal in a first mode in a third frequency domain unit, the terminal can search for the reference signal in either the first or third frequency domain unit.

[0252] H-5: The communication device searches for a reference signal in the frequency domain unit corresponding to the search type in the first frequency domain unit and the seventh frequency domain unit; for example, at least one synchronization raster can be predefined, with type 1 used for the reference signal in the first frequency domain unit and type 2 used for the reference signal in the seventh frequency domain unit. Then the terminal can preferentially use the type 1 synchronization raster to search for the reference signal in the first frequency domain unit.

[0253] Furthermore, regarding items H-1 to H-5 above, it should be noted that when multiple multi-frequency domain units are enabled in a single-cell multi-frequency domain unit scenario, in order to reduce the transmission of reference signals on some multi-frequency domain units, the network-side equipment can reduce the transmission of reference signals on some multi-frequency domain units. However, how to search for the corresponding multi-frequency domain units during initial access and ensure successful completion of initial access is a problem that needs to be solved. In some embodiments of this application, items H-1 to H-5 above define a method for searching for reference signals among multiple frequency domain units, allowing the terminal to accurately search for frequency domain units with reference signal transmission, thereby improving the success rate of initial access and reducing the latency of initial access.

[0254] Optionally, the communication device transmits a fourth reference signal in a second mode on the fifth frequency domain cell of the first cell, including:

[0255] If the fifth condition is met, the communication device transmits the fourth reference signal in the second mode on the fifth frequency domain unit;

[0256] The fifth condition includes at least one of the following J-1 to J-3:

[0257] J-1: The bandwidth of the fifth frequency domain unit is less than or equal to the twelfth threshold;

[0258] The twelfth threshold can be related to the channel bandwidth; for example, 5MHz, 10MHz, 20MHz, and 50MHz can correspond to different twelfth thresholds.

[0259] J-2: The bandwidth of the fifth frequency domain unit is greater than or equal to the thirteenth threshold;

[0260] The thirteenth threshold can be related to the channel bandwidth; for example, 5MHz, 10MHz, 20MHz, and 50MHz can correspond to different thirteenth thresholds.

[0261] Furthermore, transmitting the reference signal in a frequency domain cell with a larger bandwidth (i.e., greater than the thirteenth threshold) can avoid the problem of excessive load caused by transmitting the reference signal in a frequency domain cell with too small a bandwidth, thus achieving load balancing. At the same time, transmitting the reference signal in a frequency domain cell with a larger bandwidth can result in better reference signal transmission performance.

[0262] J-3: The frequency domain interval between the fifth frequency domain unit and the eighth frequency domain unit is greater than or equal to the fourteenth threshold, and the eighth frequency domain unit includes the frequency domain units of the first cell other than the fifth frequency domain unit.

[0263] The frequency domain spacing between the fifth frequency domain unit and the eighth frequency domain unit may include at least one of the following: the frequency domain spacing between the center frequency points of the fifth frequency domain unit and the eighth frequency domain unit, the frequency domain spacing at the starting position of the fifth frequency domain unit and the eighth frequency domain unit, and the frequency domain spacing at the ending position of the fifth frequency domain unit and the eighth frequency domain unit.

[0264] In addition, the fourteenth threshold can be related to the SCS. For example, the fourteenth threshold can be determined based on at least one of the following: the SCS of the fifth frequency domain unit, the SCS of the eighth frequency domain unit, the reference SCS configured by the network-side equipment, the maximum SCS among all frequency domain units of the first cell, the minimum SCS among all frequency domain units of the first cell, the maximum SCS in the fifth frequency domain unit, the minimum SCS in the fifth frequency domain unit, the maximum SCS in the eighth frequency domain unit, and the minimum SCS in the eighth frequency domain unit.

[0265] The frequency domain interval between the fifth frequency domain unit and the eighth frequency domain unit is greater than or equal to the fourteenth threshold, indicating that the transmission timing of the fifth frequency domain unit may be different from that of the eighth frequency domain unit. In order to ensure transmission in the fifth frequency domain unit, a reference signal can be transmitted in the fifth frequency domain unit.

[0266] Furthermore, regarding the conditions described in items J-1 to J-3 above, it should be noted that when multiple frequency domain units are enabled in a single-cell, multi-frequency domain unit scenario, reference signals need to be transmitted across multiple frequency domain units to ensure accurate synchronization and AGC adjustment of the terminal across these units. Since transmitting reference signals from multiple frequency domain units increases network power consumption, certain conditions can be set for the transmission of reference signals from multiple frequency domain units through items J-1 to J-3 above. This allows the network-side equipment to only enable the transmission of reference signals from frequency domain units that meet the conditions, ensuring accurate synchronization and AGC adjustment of the terminal across those units while avoiding increased network power consumption caused by transmitting reference signals across too many frequency domain units.

[0267] Optionally, the fourth reference signal transmitted in the second mode satisfies at least one of the following K-1 to K-3:

[0268] K-1: The fourth reference signals transmitted on at least one frequency domain unit included in the fifth frequency domain unit may or may not overlap in the time domain;

[0269] K-2: The fourth reference signals transmitted on at least one frequency domain unit included in the fifth frequency domain unit have the same or different numbers;

[0270] Optionally, the fourth reference signal transmitted on each frequency domain unit in the fifth frequency domain unit is independently numbered; in this case, for example, at least some frequency domain units (e.g., all frequency domain units) included in the fifth frequency domain unit can transmit fourth reference signals with the same number, wherein SIB1 can carry time-domain position or numbering information of a fourth reference signal transmission for at least some frequency domain units (e.g., all frequency domain units) included in the fifth frequency domain unit; or, for example, different frequency domain units included in the fifth frequency domain unit can transmit fourth reference signals with different numbers, wherein SIB1 can carry time-domain position or numbering information of multiple fourth reference signals transmission for multiple frequency domain units included in the fifth frequency domain unit.

[0271] It should be noted that, when the fourth reference signal transmitted on each frequency domain unit in the fifth frequency domain unit is numbered independently, the information of the frequency domain unit transmitting the fourth reference signal can be carried in the system message.

[0272] Optionally, the fourth reference signals transmitted on multiple frequency domain units in the fifth frequency domain unit are jointly numbered.

[0273] For example, the fourth reference signals in multiple frequency domain units in the fifth frequency domain unit are numbered in the order of time domain first and then frequency domain. That is, for multiple fourth reference signals, the fourth reference signals can first be sorted according to the order of time domain resources within a period, and then sorted according to the order of frequency domain units, so as to number the multiple fourth reference signals based on the final sorting.

[0274] or,

[0275] For example, the fourth reference signals in multiple frequency domain units in the fifth frequency domain unit are numbered in the order of frequency domain first, then time domain. That is, for multiple fourth reference signals, the fourth reference signals can be sorted first according to the order of frequency domain units within a period, and then sorted according to the order of time domain resources, so as to number the multiple fourth reference signals based on the final sorting.

[0276] It should be noted that when the fourth reference signals transmitted on multiple frequency domain units in the fifth frequency domain unit are jointly numbered, the information of the frequency domain unit and the fourth reference signal can be obtained by detecting the fourth reference signal.

[0277] K-3: The number of fourth reference signals transmitted on at least one frequency domain unit included in the fifth frequency domain unit may be the same or different.

[0278] Specifically, regarding item K-1, in some embodiments, the fourth reference signal transmitted on at least one frequency domain unit included in the fifth frequency domain unit does not overlap in the time domain by means of at least one of the following L-1 to L-4:

[0279] L-1: The duration of the fourth reference signal transmitted on N3 frequency domain units in the fifth frequency domain unit is N3*T, where T represents the duration of the fourth reference signal transmitted on one frequency domain unit within one transmission period; optionally, T is greater than a predetermined threshold, that is, the fourth reference signal can be transmitted for a longer period.

[0280] L-3: The fourth reference signal transmitted on N3 frequency domain units in the fifth frequency domain unit satisfies a pattern within a time period of N3*T, wherein the repetition period of the pattern is the same as the transmission period of the fourth reference signal.

[0281] L-4: In the fifth frequency domain unit, the time-domain starting position of the fourth reference signal transmitted on the frequency domain unit numbered i+1 is determined based on the time-domain starting position of the fourth reference signal transmitted on the frequency domain unit numbered i and the time-domain offset value; for example, the time-domain positions of the fourth reference signal transmitted on the frequency domain unit numbered i and the frequency domain unit numbered i+1 satisfy the following relationship: S(i+1)=offset+S(i), where S(i) represents the time-domain starting position of the fourth reference signal transmitted on the frequency domain unit numbered i, S(i+1) represents the time-domain starting position of the fourth reference signal transmitted on the frequency domain unit numbered i+1, and offset represents the time-domain offset value.

[0282] In some embodiments, the fourth reference signal transmitted on the multiple frequency domain units included in the fifth frequency domain unit satisfies a pattern.

[0283] For example, as shown in Figure 5, N3 = 3, T = 5 milliseconds (ms), N3 * T = 15 ms, offset = 5 ms, and each slot is 0.5 ms. Then, in each frequency domain unit included in the fifth frequency domain unit:

[0284] The fourth reference signal in the first frequency domain unit starts at slot 0 in 20ms and lasts for 5ms;

[0285] The fourth reference signal in the second frequency domain unit starts at slot 10 in 20ms and lasts for 5ms.

[0286] The fourth reference signal in the third frequency domain unit starts at slot 20 in 20ms and lasts for 5ms.

[0287] Optionally, the first transmission parameters of the fourth reference signal and system information block transmitted on the fifth frequency domain unit include at least one of the following O-1 to O-5:

[0288] Item O-1: First offset value, which is the offset between the subcarrier of the fourth reference signal and the subcarrier corresponding to the resource block where the fourth reference signal is located; wherein, the first offset value can also be called Kssb.

[0289] Alternatively, all frequency domain units of the first cell can use the same Kssb; in this case, the MIB can carry one Kssb for all frequency domain units of the first cell.

[0290] Alternatively, different frequency domain units of the first cell can use different Kssb; in this case, the MIB can carry at least one Kssb for multiple frequency domain units of the first cell.

[0291] For example, the MIB of the fourth reference signal transmitted on each frequency unit included in the fifth frequency unit carries the Kssb corresponding to the fourth reference signal transmitted on all frequency units included in the fifth unit (for example, if the fifth frequency unit includes frequency units-1 to frequency units-3, then the MIB of the fourth reference signal transmitted on frequency units-1, frequency units-2, and frequency units-3 can all carry the Kssb corresponding to these three fourth reference signals).

[0292] Alternatively, for example, in the fifth frequency domain unit, the MIB in the fourth reference signal transmitted in each frequency domain unit carries the Kssb corresponding to the fourth reference signal in that frequency domain unit.

[0293] Alternatively, for example, the MIB carries the corresponding Kssb according to the frequency range where the fifth frequency domain unit is located; that is, the Kssb can be related to the frequency range; for example, if the frequency range where all frequency domain units of the first cell are located is X~Y GHz, the number of Kssb is n1; if the frequency range where all frequency domain units of the first cell are located is Y~Z GHz, the number of Kssb is n2.

[0294] Item O-2: Frequency domain location of the control resource set corresponding to the system message (Type 0CORESET);

[0295] The frequency domain position of the control resource set corresponding to the system message can be determined based on the third offset value of the starting position of the fourth reference signal; the third offset value can be indicated in the MIB; the third offset value of different frequency domain units can be different; for example, a table can be predefined, including different third offset values ​​and corresponding indices, and the index of the third offset value can be indicated in the MIB.

[0296] Item O-3: Second offset value (also known as o Offset to point A), the second offset value is: the offset value between the resource block where the fourth reference signal is located and the starting position of the channel bandwidth resource block;

[0297] The second offset value can be carried in the SIB;

[0298] In addition, the second offset values ​​of different frequency domain units can be the same (i.e., different frequency domain units share a second offset value), or, because the reference signal frequencies of different frequency domain units are different, the second offset values ​​of different frequency domain units can also be different. For example, SIB1 can carry the second offset values ​​corresponding to each frequency domain unit included in the fifth frequency domain unit.

[0299] Item O-4: Transmission parameters of the fourth reference signal;

[0300] The transmission parameters of the fourth reference signal may include at least one of the following: frequency, transmit power, positioninBurst, and period. positioninBurst represents a parameter used to define the position of the synchronization signal block in the time domain.

[0301] Additionally, the transmission parameters of the fourth reference signal, which includes at least one frequency domain unit (e.g., all frequency domain units), can be carried by SIB1.

[0302] Item O-5: Initial Bandwidth Portion (BWP).

[0303] The initial BWP includes at least one of the initial uplink (UL) BWP and the initial downlink (DL) BWP.

[0304] For an initial DL BWP, at least some frequency domain units (e.g., all frequency domain units) in the fifth frequency domain unit may share an initial DL BWP, which includes the frequency domain resources corresponding to these frequency domain units. Alternatively, different frequency domain units in the fifth frequency domain unit may correspond to different initial DL BWPs. For example, each frequency point transmitting the fourth reference signal may correspond to an initial DL BWP, and the initial DL BWP corresponding to each frequency domain unit can be indicated by CORESET 0 corresponding to the frequency domain unit transmitting the fourth reference signal. CORESET 0 represents a control resource set specifically used for transmitting SIB1.

[0305] For an initial UL BWP, at least some frequency domain units (e.g., all frequency domain units) in the fifth frequency domain unit may share an initial UL BWP; the frequency domain resources corresponding to these frequency domain units are specified in the initial UL BWP. Alternatively, different frequency domain units in the fifth frequency domain unit may correspond to different initial UL BWPs. For example, each frequency point transmitting the fourth reference signal may correspond to an initial UL BWP, and the system message may configure multiple initial UL BWPs, each corresponding to multiple frequency domain units.

[0306] Optionally, the system message may include at least one of O-1 to O-5 mentioned above.

[0307] Optionally, different frequency domain units in the fifth frequency domain unit use the same second transmission parameter; or, different frequency domain units in the fifth frequency domain unit use different third transmission parameters.

[0308] The second transmission parameter includes at least some of the parameters in the first transmission parameter, and the third transmission parameter includes at least some of the parameters in the first transmission parameter.

[0309] For example, the second transmission parameter may include at least one of the following: the first offset value, the third offset value, the second offset value, the transmit power of the fourth reference signal, the period of the fourth reference signal, the initial DL BWP, and the initial UL BWP.

[0310] The third transmission parameter may include at least one of the following: the first offset value mentioned above, the frequency domain position of the control resource set corresponding to the system message, the third offset value, the second offset value, the frequency point of the fourth reference signal, the transmit power of the fourth reference signal, the positioninBurst of the fourth reference signal, the initial DL BWP, and the initial UL BWP.

[0311] Optionally, when the communication device transmits the first reference signal on the first frequency domain unit and the third reference signal on the fourth frequency domain unit, the first reference signal or the system message transmitted on the first frequency domain unit includes fourth indication information.

[0312] The fourth indication information is used to indicate at least one of the following:

[0313] Frequency domain information of the third reference signal corresponding to the first operator of the communication device;

[0314] Frequency domain information of the third reference signal corresponding to the second operator;

[0315] Frequency domain information corresponding to the first device type;

[0316] The first operator is different from the second operator.

[0317] In addition, devices belonging to the first device type include at least one of the following: MTC devices, Reduced Capability (RedCap) devices, and Internet of Things (IoT) devices.

[0318] Therefore, if the communication equipment operates on the first and fourth frequency domain units and corresponds to the first operator, then when the terminal transmits the first parameter signal on the first frequency domain unit and the third reference signal on the fourth frequency domain unit, the frequency domain information of the third reference signal corresponding to the first operator can be indicated on the first frequency domain unit, or the frequency domain information of the third reference signal corresponding to the second operator can be indicated on the first frequency domain unit, thus facilitating the transmission of the third reference signals corresponding to the first and second operators. Alternatively, the frequency domain information corresponding to the first device type can be indicated on the first frequency domain unit, allowing devices of the first device type to perform access, measurement, etc., based on the indicated frequency domain information and the third reference signal. For example, if network-side equipment needs to serve devices such as MTC, RedCap, and IoT, and since these devices may have lower requirements for synchronization and measurement accuracy, the network can save network energy by transmitting the third reference signal on a dedicated frequency point.

[0319] Optionally, when the communication device transmits the first reference signal on the first frequency domain unit and the third reference signal on the fourth frequency domain unit, and the communication device corresponds to a first object, the first reference signal or system message transmitted on the first object includes fifth indication information.

[0320] The fifth indication information is used to indicate at least one of the following:

[0321] Parameter information of the first reference signal corresponding to the second object;

[0322] The parameter information of the third reference signal corresponding to the second object;

[0323] The second object's Public Land Mobile Network (PLMN) information;

[0324] Wherein, when the frequency domain units included in the first frequency domain unit and the fourth frequency domain unit are of the first granularity (e.g., frequency band), the first object includes a frequency domain unit of the second granularity (e.g., frequency band), the second object includes another frequency domain unit of the second granularity, and the width of the frequency domain unit of the second granularity is greater than the width of the frequency domain unit of the second granularity.

[0325] or,

[0326] The first object includes a first wireless access network, and the second object includes a second wireless access network.

[0327] The first and second wireless access networks mentioned above are two of the following: 4G, 5G, 6G, Terrestrial Network (TN), and Non-Terrestrial Network (NTN).

[0328] Additionally, when the first object includes a second-granularity frequency domain unit or a first wireless access network, the parameter information indicated by the fifth indication information includes frequency domain information.

[0329] When the first object includes a terrestrial network, the parameter information indicated by the fifth indication information may include at least one of the following: frequency domain information of the reference signal, whether ephemeris is required for access, whether to transmit the reference signal requested on demand, time domain offset information, frequency domain offset information, whether to enable long period, and whether to perform beam hopping of the reference signal.

[0330] Therefore, in some embodiments, when the communication device transmits the first reference signal in the first frequency domain unit and the third reference signal in the fourth frequency domain unit, if the communication device corresponds to a first frequency band, then the first reference signal or system message in the first frequency band can carry an indication information, which can be used to indicate at least one of the following:

[0331] Frequency domain information of the first reference signal in the second frequency band;

[0332] Frequency domain information of the third reference signal in the second frequency band;

[0333] The PLMN information for the second frequency band corresponds to either the first or second operator.

[0334] In some embodiments, when the communication device transmits the first reference signal on the first frequency domain unit and the third reference signal on the fourth frequency domain unit, if the communication device corresponds to a first radio access network, then the first reference signal or system message transmitted on the first radio access network may carry an indication information that can be used to indicate at least one of the following:

[0335] Frequency domain information of the first reference signal of the second wireless access network;

[0336] Frequency domain information of the third reference signal of the second wireless access network;

[0337] The PLMN information of the second wireless access network, which corresponds to the first operator or the second operator.

[0338] In some embodiments, when the communication device transmits the first reference signal on the first frequency domain unit and the third reference signal on the fourth frequency domain unit, if the communication device corresponds to a TN network, then the first reference signal or system message transmitted on the TN network may carry indication information, which can be used to indicate at least one of the following:

[0339] Parameter information of the first reference signal of NTN.

[0340] Parameter information of the third reference signal of NTN.

[0341] Furthermore, it should be noted that in this paper, transmitting a reference signal on a frequency domain unit means transmitting a reference signal on the frequency domain resource corresponding to the frequency domain unit.

[0342] To facilitate understanding of the reference signal transmission method in the embodiments of this application, taking a frequency domain unit as the frequency band and an SSB as the reference signal as an example, the specific implementation methods of items A-1 to A-3 are described as follows:

[0343] Implementation method 1: The frequency band set of the first cell includes multiple frequency band subsets, and each frequency band subset includes at least one frequency band; wherein, the network side equipment can transmit the first synchronization signal on the first frequency band of the first cell, and not transmit the first synchronization signal on the second frequency band (or transmit the first synchronization signal in an energy-saving mode). In this case, the transmission on the second frequency band can be performed based on the first synchronization signal transmitted on the first frequency band.

[0344] For example, as shown in Figure 6, the frequency bands of Cell 1 include bands 1-4, where bands 1 and 2 form band subset 1, and bands 3 and 4 form band subset 2. For band subset 1, normal SSB (Normal-SSB) (i.e., periodically transmitted SSB) is transmitted on band 1, and normal-SSB is not transmitted on band 2; for band subset 2, normal SSB (Normal-SSB) (i.e., periodically transmitted SSB) is transmitted on band 3, and normal-SSB is not transmitted on band 4.

[0345] Furthermore, the network-side device may, under the condition described above, not transmit the first synchronization signal on the second frequency band (or transmit the first synchronization signal in an energy-saving mode).

[0346] Furthermore, the network-side device can transmit an on-demand second synchronization signal on the second frequency band, for example, as shown in Figure 6, transmitting an on-demand SSB (OD-SSB) on frequency bands 2 and 4; wherein, the transmission of the second synchronization signal can be triggered by the network-side device or by the terminal, and the specific triggering method can be referred to the above description, which will not be repeated here; in addition, the network-side device can transmit the on-demand second synchronization signal on the second frequency band when the third condition mentioned above is met.

[0347] Furthermore, the network device can indicate whether the first synchronization signal is transmitted on the second frequency band, or whether the second synchronization signal can be triggered as needed.

[0348] Furthermore, network-side devices and terminals can transmit random access messages on at least one of the first frequency band and the second frequency band. For specific transmission methods, please refer to the above description, which will not be repeated here.

[0349] Furthermore, network-side devices and terminals can transmit paging messages on at least one of the first frequency band and the second frequency band. For specific transmission methods, please refer to the above description, which will not be repeated here.

[0350] Furthermore, when searching for synchronization signals, the terminal can prioritize searching for synchronization signals in the first frequency band, or search for synchronization signals only in the first frequency band.

[0351] Implementation Method 2: The frequency band set of the first cell includes multiple frequency band subsets, and each frequency band subset includes at least one frequency band; wherein, the network-side equipment can transmit third synchronization signals on multiple third frequency bands, and the third synchronization signals transmitted on multiple third frequency bands satisfy the second mode; wherein, the relevant introduction to the second mode can be found in the previous text, and will not be repeated here.

[0352] For example, as shown in Figure 7, the frequency bands of Cell 1 include bands 1-3, where bands 1, 2, and 3 form a frequency band subset. For this frequency band subset, SSB set #1 is transmitted on band 1, SSB set #2 is transmitted on band 2, and SSB set #3 is transmitted on band 3; wherein SSB set #1 of band 1, SSB set #2 of band 2, and SSB set #3 of band 3 do not overlap in the time domain; and the SSB set on each frequency band is transmitted with a period P.

[0353] Furthermore, if the fifth condition described above is met, the network-side equipment transmits third synchronization signals on multiple third frequency bands.

[0354] Furthermore, the network-side device can transmit the second synchronization signal on demand in the third frequency band; wherein, the transmission of the second synchronization signal can be triggered by the network-side device or by the terminal, and the specific triggering method can be referred to the above description, which will not be repeated here; in addition, the network-side device can transmit the second synchronization signal on demand in the third frequency band when the above third condition is met.

[0355] Furthermore, the third synchronization signals transmitted on multiple third frequency bands are numbered independently or jointly.

[0356] Furthermore, the system message may include transmission parameters of the third synchronization signal transmitted in the third frequency domain band, which may include at least one of O-1 to O-5 mentioned above.

[0357] In addition, it should be noted that in Figures 6 and 7, Type-1 FU represents the frequency domain unit for transmitting Normal-SSB (corresponding to the first reference signal mentioned above), and Type-1 FU represents the frequency domain unit for transmitting OD-SSB (corresponding to the on-demand triggering reference signal mentioned above).

[0358] The reference signal transmission method provided in this application can be executed by a reference signal transmission device. This application uses an example of a reference signal transmission device executing the reference signal transmission method to illustrate the reference signal transmission device provided in this application.

[0359] Referring to Figure 8, an embodiment of this application provides a reference signal transmission device applied to a communication device. The reference signal transmission device 80 includes the following modules:

[0360] Transmission module 801 is configured to perform at least one of the following:

[0361] A first reference signal is transmitted in a first frequency domain cell of the first cell, and at least one of the following is performed: the first reference signal is not transmitted in a second frequency domain cell of the first cell, and a second reference signal is transmitted in a first mode in a third frequency domain cell of the first cell;

[0362] A third reference signal is transmitted on the fourth frequency domain cell of the first cell, and the third reference signal is triggered on demand;

[0363] The fourth reference signal is transmitted in the second mode on the fifth frequency domain cell of the first cell.

[0364] Optionally, if the first condition is met, the first reference signal is not transmitted in the second frequency domain unit;

[0365] The first condition includes at least one of the following:

[0366] The deviation between the transmission timing of the first frequency domain unit and the transmission timing of the second frequency domain unit is less than or equal to a first threshold;

[0367] The frequency domain spacing between the first frequency domain unit and the second frequency domain unit is less than or equal to the second threshold;

[0368] The deviation between the signal quality of the first frequency domain unit and the signal quality of the second frequency domain unit is less than or equal to a third threshold.

[0369] Optionally, if the second condition is met, the second reference signal is transmitted in a first mode on the third frequency domain unit;

[0370] The second condition includes at least one of the following:

[0371] The deviation between the transmission timing of the first frequency domain unit and the transmission timing of the third frequency domain unit is less than or equal to the fourth threshold;

[0372] The frequency domain spacing between the first frequency domain unit and the third frequency domain unit is less than or equal to the fifth threshold;

[0373] The deviation between the signal quality of the first frequency domain unit and the signal quality of the third frequency domain unit is less than or equal to the sixth threshold.

[0374] Optionally, the second reference signal transmitted in the first mode has at least some of the same transmission parameters as the first reference signal;

[0375] Alternatively, the second reference signal transmitted in the first mode may have different transmission parameters from at least a portion of the first reference signal.

[0376] Optionally, the transmission module 801 is further configured to: transmit first indication information;

[0377] The first indication information is used to indicate at least one of the following:

[0378] Does the second frequency domain unit transmit a reference signal?

[0379] The frequency domain cell in the first cell that transmits the reference signal;

[0380] The first cell does not have a frequency domain cell that transmits a reference signal;

[0381] The transmission mode of the reference signal on the frequency domain cell of the first cell.

[0382] Optionally, if the third condition is met, the third reference signal is transmitted on the fourth frequency domain unit;

[0383] The third condition includes at least one of the following:

[0384] The deviation between the transmission timing of the first frequency domain unit and the transmission timing of the fourth frequency domain unit is greater than or equal to the seventh threshold.

[0385] The frequency domain spacing between the first frequency domain unit and the fourth frequency domain unit is greater than or equal to the eighth threshold;

[0386] The signal quality of the fourth frequency domain unit is less than or equal to the ninth threshold;

[0387] First business arrives;

[0388] At least some of the communication devices corresponding to the fourth frequency domain unit undergo beam switching;

[0389] The signal quality of the fourth frequency domain unit is less than or equal to the tenth threshold.

[0390] Optionally, the transmission module 801 is further configured to:

[0391] When the communication device is a first communication device, second instruction information is transmitted;

[0392] or,

[0393] When the communication device is a second communication device, an uplink request signal is transmitted;

[0394] The second indication information is used to indicate that the third reference signal is transmitted on at least one frequency domain unit included in the fourth frequency domain unit;

[0395] The uplink request signal is used to request the transmission of the third reference signal on at least one frequency domain unit included in the fourth frequency domain unit.

[0396] Optionally, the transmission module 801 transmits the second indication information, including:

[0397] The second instruction information is transmitted on at least one of the following:

[0398] The first frequency domain unit, the second frequency domain unit, the third frequency domain unit, the fourth frequency domain unit, and the fifth frequency domain unit.

[0399] Optionally, the transmission module 801 transmits the uplink request signal, including:

[0400] The uplink request signal is transmitted on at least one of the following:

[0401] The first frequency domain unit, the second frequency domain unit, the third frequency domain unit, the fourth frequency domain unit, and the fifth frequency domain unit.

[0402] Optionally, the transmission module 801 is further configured to perform at least one of the following:

[0403] Random access messages are transmitted in at least one of the first frequency domain unit and the sixth frequency domain unit, wherein the sixth frequency domain unit includes at least one of the following: the second frequency domain unit, the third frequency domain unit, the fourth frequency domain unit, and the fifth frequency domain unit;

[0404] Transmit third indication information, the third indication information being used to transmit random access messages on at least one of the first frequency domain unit and the sixth frequency domain unit;

[0405] Paging messages are transmitted in at least one of the first frequency domain unit and the sixth frequency domain unit.

[0406] Optionally, the random access resources of the sixth frequency domain unit satisfy at least one of the following:

[0407] The random access resources of the sixth frequency domain unit are indicated by system messages transmitted on the first frequency domain unit;

[0408] The random access resources of the sixth frequency domain unit are indicated by system messages transmitted on the sixth frequency domain unit;

[0409] The random access resources of each frequency domain unit in the sixth frequency domain unit are associated with the first reference signal transmitted on one frequency domain unit in the first frequency domain unit;

[0410] The random access resources of multiple frequency domain units in the sixth frequency domain unit are associated with the first reference signal transmitted on one of the frequency domain units in the first frequency domain unit;

[0411] Each frequency domain unit in the sixth frequency domain unit has an independently numbered random access resource;

[0412] The joint numbering of random access resources for each frequency domain unit in the sixth frequency domain unit.

[0413] Optionally, the device further includes:

[0414] The processing module is used to perform one of the following:

[0415] The reference signal is searched in the first frequency domain unit, but not in the seventh frequency domain unit, wherein the seventh frequency domain unit includes at least one of the second frequency domain unit and the third frequency domain unit;

[0416] The reference signal is first searched in the first frequency domain unit, and if the fourth condition is met, the reference signal is searched in the seventh frequency domain unit.

[0417] Search for a reference signal in the first frequency domain unit;

[0418] Search for a reference signal in the seventh frequency domain unit;

[0419] In the first frequency domain unit and the seventh frequency domain unit, a reference signal is searched in the frequency domain unit corresponding to the search type.

[0420] Optionally, the fourth condition includes at least one of the following:

[0421] No reference signal was found in the first frequency domain unit;

[0422] The signal strength of the reference signal searched in the first frequency domain unit is less than or equal to the eleventh threshold;

[0423] The communication device does not belong to the device types that are allowed to be accessed by the first frequency domain unit;

[0424] The first reference signal transmitted on the first frequency domain unit carries a predetermined indication.

[0425] Optionally, if the fifth condition is met, the fourth reference signal is transmitted in the second mode on the fifth frequency domain unit;

[0426] The fifth condition includes at least one of the following:

[0427] The bandwidth of the fifth frequency domain unit is less than or equal to the twelfth threshold;

[0428] The bandwidth of the fifth frequency domain unit is greater than or equal to the thirteenth threshold;

[0429] The frequency domain interval between the fifth frequency domain unit and the eighth frequency domain unit is greater than or equal to the fourteenth threshold, and the eighth frequency domain unit includes the frequency domain units of the first cell other than the fifth frequency domain unit.

[0430] Optionally, the fourth reference signal transmitted in the second mode satisfies at least one of the following:

[0431] The fourth reference signal transmitted on at least one frequency domain unit of the fifth frequency domain unit may or may not overlap in the time domain;

[0432] The fourth reference signal transmitted on at least one frequency domain unit of the fifth frequency domain unit may have the same or different numbers.

[0433] The number of fourth reference signals transmitted on at least one frequency domain unit included in the fifth frequency domain unit may be the same or different.

[0434] Optionally, the fourth reference signal transmitted in each frequency domain unit of the fifth frequency domain unit is numbered independently;

[0435] Alternatively, the fourth reference signals transmitted on multiple frequency domain units in the fifth frequency domain unit are jointly numbered.

[0436] Optionally, the first transmission parameters of the fourth reference signal and system information block transmitted on the fifth frequency domain unit include at least one of the following:

[0437] The first offset value is the offset value between the subcarrier of the fourth reference signal and the subcarrier corresponding to the resource block where the fourth reference signal is located;

[0438] The frequency domain location of the control resource set corresponding to the system message;

[0439] The second offset value is the offset between the resource block where the fourth reference signal is located and the starting position of the channel bandwidth resource block.

[0440] The transmission parameters of the fourth reference signal;

[0441] Initial bandwidth portion BWP.

[0442] Optionally, different frequency domain units in the fifth frequency domain unit use the same second transmission parameter; or, different frequency domain units in the fifth frequency domain unit use different third transmission parameters.

[0443] The second transmission parameter includes at least some of the parameters in the first transmission parameter, and the third transmission parameter includes at least some of the parameters in the first transmission parameter.

[0444] Optionally, when the transmission module transmits the first reference signal on the first frequency domain unit and the third reference signal on the fourth frequency domain unit, the first reference signal or the system message transmitted on the first frequency domain unit includes fourth indication information.

[0445] The fourth indication information is used to indicate at least one of the following:

[0446] Frequency domain information of the third reference signal corresponding to the first operator of the communication device;

[0447] Frequency domain information of the third reference signal corresponding to the second operator;

[0448] Frequency domain information corresponding to the first device type;

[0449] The first operator is different from the second operator.

[0450] The reference signal transmission device in this application embodiment can be an electronic device, such as an electronic device with an operating system, or a component in an electronic device, such as an integrated circuit or a chip. The electronic device can be a terminal, or other devices besides a terminal. For example, the terminal can include, but is not limited to, the type of terminal 11 listed above; other devices can be servers, network attached storage (NAS), etc., and this application embodiment does not specifically limit the type.

[0451] The reference signal transmission device provided in this application embodiment can implement the various processes implemented in the method embodiment of FIG4 and achieve the same technical effect. To avoid repetition, it will not be described again here.

[0452] As shown in Figure 9, this application embodiment also provides a communication device 900, including a processor 901 and a memory 902. The memory 902 stores a program or instructions that can run on the processor 901. When the program or instructions are executed by the processor 901, they implement the various steps of the above-described reference signal transmission method embodiment and achieve the same technical effect. To avoid repetition, further details are omitted here.

[0453] This application also provides a terminal, including a processor and a communication interface, wherein the communication interface is coupled to the processor, and the processor is used to run programs or instructions to implement the steps in the method embodiment shown in FIG4. This terminal embodiment corresponds to the above-described terminal-side method embodiment, and all implementation processes and methods of the above-described method embodiments can be applied to this terminal embodiment and can achieve the same technical effect. Specifically, FIG10 is a schematic diagram of the hardware structure of a terminal implementing an embodiment of this application.

[0454] The terminal 1000 includes, but is not limited to, at least some of the following components: radio frequency unit 1001, network module 1002, audio output unit 1003, input unit 1004, sensor 1005, display unit 1006, user input unit 1007, interface unit 1008, memory 1009, and processor 1010.

[0455] Those skilled in the art will understand that the terminal 1000 may also include a power supply (such as a battery) for powering various components. The power supply can be logically connected to the processor 1010 through a power management system, thereby enabling functions such as charging, discharging, and power consumption management through the power management system. The terminal structure shown in Figure 10 does not constitute a limitation on the terminal. The terminal may include more or fewer components than shown, or combine certain components, or have different component arrangements, which will not be elaborated here.

[0456] It should be understood that, in this embodiment, the input unit 1004 may include a graphics processing unit (GPU) 10041 and a microphone 10042. The GPU 10041 processes image data of still images or videos obtained by an image capture device (such as a camera) in video capture mode or image capture mode. The display unit 1006 may include a display panel 10061, which may be configured in the form of a liquid crystal display, an organic light-emitting diode, etc. The user input unit 1007 includes a touch panel 10071 and at least one of other input devices 10072. The touch panel 10071 is also called a touch screen. The touch panel 10071 may include a touch detection device and a touch controller. Other input devices 10072 may include, but are not limited to, physical keyboards, function keys (such as volume control buttons, power buttons, etc.), trackballs, mice, joysticks, etc., which will not be described in detail here.

[0457] In this embodiment, after receiving downlink data from the network-side device, the radio frequency unit 1001 can transmit it to the processor 1010 for processing; in addition, the radio frequency unit 1001 can send uplink data to the network-side device. Typically, the radio frequency unit 1001 includes, but is not limited to, antennas, amplifiers, transceivers, couplers, low-noise amplifiers, duplexers, etc.

[0458] The memory 1009 can be used to store software programs or instructions, as well as various data. The memory 1009 may primarily include a first storage area for storing programs or instructions and a second storage area for storing data. The first storage area may store the operating system, application programs or instructions required for at least one function (such as sound playback, image playback, etc.). Furthermore, the memory 1009 may include volatile memory or non-volatile memory. The non-volatile memory may be read-only memory (ROM), programmable read-only memory (PROM), erasable programmable read-only memory (EPROM), electrically erasable programmable read-only memory (EEPROM), or flash memory. Volatile memory can be random access memory (RAM), static random access memory (SRAM), dynamic random access memory (DRAM), synchronous dynamic random access memory (SDRAM), double data rate synchronous dynamic random access memory (DDRSDRAM), enhanced synchronous dynamic random access memory (ESDRAM), synchronous link dynamic random access memory (SLDRAM), and direct memory bus RAM (DRRAM). The memory 1009 in this embodiment includes, but is not limited to, these and any other suitable types of memory.

[0459] The processor 1010 may include one or more processing units; optionally, the processor 1010 integrates an application processor and a modem processor, wherein the application processor mainly handles operations involving the operating system, user interface, and applications, and the modem processor mainly handles wireless communication signals, such as a baseband processor. It is understood that the aforementioned modem processor may also not be integrated into the processor 1010.

[0460] The radio frequency unit 1001 is configured to perform at least one of the following:

[0461] A first reference signal is transmitted in a first frequency domain cell of the first cell, and at least one of the following is included: the first reference signal is not transmitted in a second frequency domain cell of the first cell, and a second reference signal is transmitted in a first mode in a third frequency domain cell of the first cell;

[0462] A third reference signal is transmitted on the fourth frequency domain cell of the first cell, and the third reference signal is triggered on demand;

[0463] The fourth reference signal is transmitted in the second mode on the fifth frequency domain cell of the first cell.

[0464] Optionally, if the first condition is met, the first reference signal is not transmitted in the second frequency domain unit;

[0465] The first condition includes at least one of the following:

[0466] The deviation between the transmission timing of the first frequency domain unit and the transmission timing of the second frequency domain unit is less than or equal to a first threshold;

[0467] The frequency domain spacing between the first frequency domain unit and the second frequency domain unit is less than or equal to the second threshold;

[0468] The deviation between the signal quality of the first frequency domain unit and the signal quality of the second frequency domain unit is less than or equal to a third threshold.

[0469] Optionally, if the second condition is met, the second reference signal is transmitted in a first mode on the third frequency domain unit;

[0470] The second condition includes at least one of the following:

[0471] The deviation between the transmission timing of the first frequency domain unit and the transmission timing of the third frequency domain unit is less than or equal to the fourth threshold;

[0472] The frequency domain spacing between the first frequency domain unit and the third frequency domain unit is less than or equal to the fifth threshold;

[0473] The deviation between the signal quality of the first frequency domain unit and the signal quality of the third frequency domain unit is less than or equal to the sixth threshold.

[0474] Optionally, the second reference signal transmitted in the first mode has at least some of the same transmission parameters as the first reference signal;

[0475] Alternatively, the second reference signal transmitted in the first mode may have different transmission parameters from at least a portion of the first reference signal.

[0476] Optionally, the radio frequency unit 1001 is further configured to: transmit first indication information;

[0477] The first indication information is used to indicate at least one of the following:

[0478] Does the second frequency domain unit transmit a reference signal?

[0479] The frequency domain cell in the first cell that transmits the reference signal;

[0480] The first cell does not have a frequency domain cell that transmits a reference signal;

[0481] The transmission mode of the reference signal on the frequency domain cell of the first cell.

[0482] Optionally, if the third condition is met, the communication device transmits the third reference signal on the fourth frequency domain unit;

[0483] The third condition includes at least one of the following:

[0484] The deviation between the transmission timing of the first frequency domain unit and the transmission timing of the fourth frequency domain unit is greater than or equal to the seventh threshold.

[0485] The frequency domain spacing between the first frequency domain unit and the fourth frequency domain unit is greater than or equal to the eighth threshold;

[0486] The signal quality of the fourth frequency domain unit is less than or equal to the ninth threshold;

[0487] First business arrives;

[0488] At least some of the communication devices corresponding to the fourth frequency domain unit undergo beam switching;

[0489] The signal quality of the fourth frequency domain unit is less than or equal to the tenth threshold.

[0490] Optionally, the radio frequency unit 1001 is further configured to:

[0491] When the communication device is a first communication device, second instruction information is transmitted;

[0492] Alternatively, if the communication device is a second communication device, an uplink request signal may be transmitted;

[0493] The second indication information is used to indicate that the third reference signal is transmitted on at least one frequency domain unit included in the fourth frequency domain unit;

[0494] The uplink request signal is used to request the transmission of the third reference signal on at least one frequency domain unit included in the fourth frequency domain unit.

[0495] Optionally, the radio frequency unit 1001 transmits the second indication information, including:

[0496] The second instruction information is transmitted on at least one of the following:

[0497] The first frequency domain unit, the second frequency domain unit, the third frequency domain unit, the fourth frequency domain unit, and the fifth frequency domain unit.

[0498] Optionally, the radio frequency unit 1001 transmits the uplink request signal, including:

[0499] The uplink request signal is transmitted on at least one of the following:

[0500] The first frequency domain unit, the second frequency domain unit, the third frequency domain unit, the fourth frequency domain unit, and the fifth frequency domain unit.

[0501] Optionally, the radio frequency unit 1001 is further configured to perform at least one of the following:

[0502] Random access messages are transmitted in at least one of the first frequency domain unit and the sixth frequency domain unit, wherein the sixth frequency domain unit includes at least one of the following: the second frequency domain unit, the third frequency domain unit, the fourth frequency domain unit, and the fifth frequency domain unit;

[0503] Transmit third indication information, the third indication information being used to transmit random access messages on at least one of the first frequency domain unit and the sixth frequency domain unit;

[0504] Paging messages are transmitted in at least one of the first frequency domain unit and the sixth frequency domain unit.

[0505] Optionally, the random access resources of the sixth frequency domain unit satisfy at least one of the following:

[0506] The random access resources of the sixth frequency domain unit are indicated by system messages transmitted on the first frequency domain unit;

[0507] The random access resources of the sixth frequency domain unit are indicated by system messages transmitted on the sixth frequency domain unit;

[0508] The random access resources of each frequency domain unit in the sixth frequency domain unit are associated with the first reference signal transmitted on one frequency domain unit in the first frequency domain unit;

[0509] The random access resources of multiple frequency domain units in the sixth frequency domain unit are associated with the first reference signal transmitted on one of the frequency domain units in the first frequency domain unit;

[0510] Each frequency domain unit in the sixth frequency domain unit has an independently numbered random access resource;

[0511] The joint numbering of random access resources for each frequency domain unit in the sixth frequency domain unit.

[0512] Optionally, the processor 1010 is used to perform one of the following:

[0513] The reference signal is searched in the first frequency domain unit, but not in the seventh frequency domain unit, wherein the seventh frequency domain unit includes at least one of the second frequency domain unit and the third frequency domain unit;

[0514] The reference signal is first searched in the first frequency domain unit, and if the fourth condition is met, the reference signal is searched in the seventh frequency domain unit.

[0515] Search for a reference signal in the first frequency domain unit;

[0516] Search for a reference signal in the seventh frequency domain unit;

[0517] In the first frequency domain unit and the seventh frequency domain unit, a reference signal is searched in the frequency domain unit corresponding to the search type.

[0518] Optionally, the fourth condition includes at least one of the following:

[0519] No reference signal was found in the first frequency domain unit;

[0520] The signal strength of the reference signal searched in the first frequency domain unit is less than or equal to the eleventh threshold;

[0521] The communication device does not belong to the device types that are allowed to be accessed by the first frequency domain unit;

[0522] The first reference signal transmitted on the first frequency domain unit carries a predetermined indication.

[0523] Optionally, if the fifth condition is met, the fourth reference signal is transmitted in the second mode on the fifth frequency domain unit;

[0524] The fifth condition includes at least one of the following:

[0525] The bandwidth of the fifth frequency domain unit is less than or equal to the twelfth threshold;

[0526] The bandwidth of the fifth frequency domain unit is greater than or equal to the thirteenth threshold;

[0527] The frequency domain interval between the fifth frequency domain unit and the eighth frequency domain unit is greater than or equal to the fourteenth threshold, and the eighth frequency domain unit includes the frequency domain units of the first cell other than the fifth frequency domain unit.

[0528] Optionally, the fourth reference signal transmitted in the second mode satisfies at least one of the following:

[0529] The fourth reference signal transmitted on at least one frequency domain unit of the fifth frequency domain unit may or may not overlap in the time domain;

[0530] The fourth reference signal transmitted on at least one frequency domain unit of the fifth frequency domain unit may have the same or different numbers.

[0531] The number of fourth reference signals transmitted on at least one frequency domain unit included in the fifth frequency domain unit may be the same or different.

[0532] Optionally, the fourth reference signal transmitted in each frequency domain unit of the fifth frequency domain unit is numbered independently;

[0533] Alternatively, the fourth reference signals transmitted on multiple frequency domain units in the fifth frequency domain unit are jointly numbered.

[0534] Optionally, the first transmission parameters of the fourth reference signal and system information block transmitted on the fifth frequency domain unit include at least one of the following:

[0535] The first offset value is: the offset value between the subcarrier of the fourth reference signal and the subcarrier corresponding to the resource block where the fourth reference signal is located;

[0536] The frequency domain location of the control resource set corresponding to the system message;

[0537] The second offset value is the offset between the resource block where the fourth reference signal is located and the starting position of the channel bandwidth resource block.

[0538] The transmission parameters of the fourth reference signal;

[0539] Initial bandwidth portion BWP.

[0540] Optionally, different frequency domain units in the fifth frequency domain unit use the same second transmission parameter; or, different frequency domain units in the fifth frequency domain unit use different third transmission parameters.

[0541] The second transmission parameter includes at least some of the parameters in the first transmission parameter, and the third transmission parameter includes at least some of the parameters in the first transmission parameter.

[0542] Optionally, when the radio frequency unit 1001 transmits the first reference signal on the first frequency domain unit and the third reference signal on the fourth frequency domain unit, the first reference signal or the system message transmitted on the first frequency domain unit includes fourth indication information.

[0543] The fourth indication information is used to indicate at least one of the following:

[0544] Frequency domain information of the third reference signal corresponding to the first operator of the communication device;

[0545] Frequency domain information of the third reference signal corresponding to the second operator;

[0546] Frequency domain information corresponding to the first device type;

[0547] The first operator is different from the second operator.

[0548] It is understood that the implementation process of each implementation method mentioned in this embodiment can refer to the relevant description of the method embodiment and achieve the same or corresponding technical effect. To avoid repetition, it will not be described again here.

[0549] This application also provides a network-side device, including a processor and a communication interface. The communication interface is coupled to the processor, and the processor is used to run programs or instructions to implement the steps of the method embodiment shown in FIG4. This network-side device embodiment corresponds to the above-described network-side device method embodiment. All implementation processes and methods of the above-described method embodiments can be applied to this network-side device embodiment and can achieve the same technical effect.

[0550] Specifically, this application embodiment also provides a network-side device. As shown in FIG11, the network-side device 1100 includes: an antenna 111, a radio frequency device 112, a baseband device 113, a processor 114, and a memory 115. The antenna 111 is connected to the radio frequency device 112. In the uplink direction, the radio frequency device 112 receives information through the antenna 111 and sends the received information to the baseband device 113 for processing. In the downlink direction, the baseband device 113 processes the information to be transmitted and sends it to the radio frequency device 112. The radio frequency device 112 processes the received information and transmits it through the antenna 111.

[0551] The method executed by the network-side device in the above embodiments can be implemented in the baseband device 113, which includes a baseband processor.

[0552] The baseband device 113 may include at least one baseband board, on which multiple chips are disposed, as shown in FIG11. One of the chips is, for example, a baseband processor, which is connected to the memory 115 via a bus interface to call the program in the memory 115 and execute the network device operation shown in the above method embodiment.

[0553] The network-side device may also include a network interface 116, such as a Common Public Radio Interface (CPRI).

[0554] Specifically, the network-side device 1100 of this embodiment of the invention further includes: instructions or programs stored in memory 115 and executable on processor 114. Processor 114 calls the instructions or programs in memory 115 to execute the methods executed by each module shown in FIG8 and achieve the same technical effect. To avoid repetition, it will not be described in detail here.

[0555] This application also provides a readable storage medium storing a program or instructions. When the program or instructions are executed by a processor, they implement the various processes of the above-described reference signal transmission method embodiments and achieve the same technical effects. To avoid repetition, they will not be described again here.

[0556] The processor mentioned above is the processor in the terminal described in the above embodiments. The readable storage medium includes computer-readable storage media, such as computer read-only memory (ROM), random access memory (RAM), magnetic disk, or optical disk. In some examples, the readable storage medium may be a non-transient readable storage medium.

[0557] This application embodiment also provides a chip, which includes a processor and a communication interface. The communication interface is coupled to the processor. The processor is used to run programs or instructions to implement the various processes of the above-described reference signal transmission method embodiment and can achieve the same technical effect. To avoid repetition, it will not be described again here.

[0558] It should be understood that the chip mentioned in the embodiments of this application may also be referred to as a system-on-a-chip, system chip, chip system, or system-on-a-chip, etc.

[0559] This application also provides a computer program / program product, which is stored in a storage medium and executed by at least one processor to implement the various processes of the above-described reference signal transmission method embodiment, and can achieve the same technical effect. To avoid repetition, it will not be described again here.

[0560] It should be noted that, in this document, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element. Furthermore, it should be noted that the scope of the methods and apparatuses in the embodiments of this application is not limited to performing functions in the order shown or discussed, but may also include performing functions substantially simultaneously or in the reverse order, depending on the functions involved. For example, the described methods may be performed in a different order than described, and various steps may be added, omitted, or combined. Additionally, features described with reference to certain examples may be combined in other examples.

[0561] From the above description of the embodiments, those skilled in the art can clearly understand that the methods of the above embodiments can be implemented by means of computer software products plus necessary general-purpose hardware platforms, and of course, they can also be implemented by hardware. The computer software product is stored in a storage medium (such as ROM, RAM, magnetic disk, optical disk, etc.) and includes several instructions to cause the terminal or network-side device to execute the methods described in the various embodiments of this application.

[0562] The embodiments of this application have been described above with reference to the accompanying drawings. However, this application is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many other implementations under the guidance of this application without departing from the spirit and scope of the claims. All of these implementations are within the protection scope of this application.

Claims

1. A reference signal transmission method, wherein, The method includes: The communication device performs at least one of the following: A first reference signal is transmitted in a first frequency domain cell of the first cell, and at least one of the following is performed: the first reference signal is not transmitted in a second frequency domain cell of the first cell, and a second reference signal is transmitted in a first mode in a third frequency domain cell of the first cell; A third reference signal is transmitted on the fourth frequency domain cell of the first cell, and the third reference signal is triggered on demand; The fourth reference signal is transmitted in the second mode on the fifth frequency domain cell of the first cell.

2. The method according to claim 1, wherein, If the first condition is met, the communication device does not transmit the first reference signal in the second frequency domain unit; The first condition includes at least one of the following: The deviation between the transmission timing of the first frequency domain unit and the transmission timing of the second frequency domain unit is less than or equal to a first threshold; The frequency domain spacing between the first frequency domain unit and the second frequency domain unit is less than or equal to the second threshold; The deviation between the signal quality of the first frequency domain unit and the signal quality of the second frequency domain unit is less than or equal to a third threshold.

3. The method according to claim 1 or 2, wherein, If the second condition is met, the communication device transmits the second reference signal in a first mode on the third frequency domain unit; The second condition includes at least one of the following: The deviation between the transmission timing of the first frequency domain unit and the transmission timing of the third frequency domain unit is less than or equal to the fourth threshold; The frequency domain spacing between the first frequency domain unit and the third frequency domain unit is less than or equal to the fifth threshold; The deviation between the signal quality of the first frequency domain unit and the signal quality of the third frequency domain unit is less than or equal to the sixth threshold.

4. The method according to any one of claims 1 to 3, wherein, The second reference signal transmitted in the first mode has at least some of the same transmission parameters as the first reference signal; Alternatively, the second reference signal transmitted in the first mode has at least some of the transmission parameters different from those of the first reference signal.

5. The method according to any one of claims 1 to 4, wherein, The method further includes: The communication device transmits first indication information; The first indication information is used to indicate at least one of the following: Does the second frequency domain unit transmit a reference signal? The frequency domain cell in the first cell that transmits the reference signal; The first cell does not have a frequency domain cell that transmits a reference signal; The transmission mode of the reference signal on the frequency domain cell of the first cell.

6. The method according to any one of claims 1 to 5, wherein, If the third condition is met, the communication device transmits the third reference signal on the fourth frequency domain unit; The third condition includes at least one of the following: The deviation between the transmission timing of the first frequency domain unit and the transmission timing of the fourth frequency domain unit is greater than or equal to the seventh threshold. The frequency domain spacing between the first frequency domain unit and the fourth frequency domain unit is greater than or equal to the eighth threshold; The signal quality of the fourth frequency domain unit is less than or equal to the ninth threshold; First business arrives; At least some of the communication devices corresponding to the fourth frequency domain unit undergo beam switching; The signal quality of the fourth frequency domain unit is less than or equal to the tenth threshold.

7. The method according to any one of claims 1 to 6, wherein, The method further includes: When the communication device is a first communication device, the first communication device transmits second indication information; or, When the communication device is a second communication device, the second communication device transmits an uplink request signal; The second indication information is used to indicate that the third reference signal is transmitted on at least one frequency domain unit included in the fourth frequency domain unit; The uplink request signal is used to request the transmission of the third reference signal on at least one frequency domain unit included in the fourth frequency domain unit.

8. The method according to claim 7, wherein, The first communication device transmits the second indication information, including: The first communication device transmits the second indication information in at least one of the following ways: The first frequency domain unit, the second frequency domain unit, the third frequency domain unit, the fourth frequency domain unit, and the fifth frequency domain unit.

9. The method according to claim 7 or 8, wherein, The second communication device transmits the uplink request signal, including: The second communication device transmits the uplink request signal in at least one of the following ways: The first frequency domain unit, the second frequency domain unit, the third frequency domain unit, the fourth frequency domain unit, and the fifth frequency domain unit.

10. The method according to any one of claims 1 to 9, wherein, The method further includes at least one of the following: The communication device transmits random access messages on at least one of the first frequency domain unit and the sixth frequency domain unit, wherein the sixth frequency domain unit includes at least one of the following: the second frequency domain unit, the third frequency domain unit, the fourth frequency domain unit, and the fifth frequency domain unit; The communication device transmits third indication information, which is used to transmit random access messages in at least one of the first frequency domain unit and the sixth frequency domain unit; The communication device transmits paging messages in at least one of the first frequency domain unit and the sixth frequency domain unit.

11. The method according to claim 10, wherein, The random access resources of the sixth frequency domain unit satisfy at least one of the following: The random access resources of the sixth frequency domain unit are indicated by system messages transmitted on the first frequency domain unit; The random access resources of the sixth frequency domain unit are indicated by system messages transmitted on the sixth frequency domain unit; The random access resources of each frequency domain unit in the sixth frequency domain unit are associated with the first reference signal transmitted on one frequency domain unit in the first frequency domain unit; The random access resources of multiple frequency domain units in the sixth frequency domain unit are associated with the first reference signal transmitted on one of the frequency domain units in the first frequency domain unit; Each frequency domain unit in the sixth frequency domain unit has an independently numbered random access resource; The joint numbering of random access resources for each frequency domain unit in the sixth frequency domain unit.

12. The method according to any one of claims 1 to 11, wherein, The method further includes one of the following: The communication device searches for a reference signal in the first frequency domain unit but not in the seventh frequency domain unit, wherein the seventh frequency domain unit includes at least one of the second frequency domain unit and the third frequency domain unit; The communication device first searches for a reference signal in the first frequency domain unit, and searches for a reference signal in the seventh frequency domain unit when the fourth condition is met. The communication device searches for a reference signal in the first frequency domain unit; The communication device searches for a reference signal in the seventh frequency domain unit; The communication device searches for a reference signal in the frequency domain unit corresponding to the search type in the first frequency domain unit and the seventh frequency domain unit.

13. The method according to claim 12, wherein, The fourth condition includes at least one of the following: No reference signal was found in the first frequency domain unit; The signal strength of the reference signal searched in the first frequency domain unit is less than or equal to the eleventh threshold; The communication device does not belong to the device types that are allowed to be accessed by the first frequency domain unit; The first reference signal transmitted on the first frequency domain unit carries a predetermined indication.

14. The method according to any one of claims 1 to 13, wherein, If the fifth condition is met, the communication device transmits the fourth reference signal in the second mode on the fifth frequency domain unit; The fifth condition includes at least one of the following: The bandwidth of the fifth frequency domain unit is less than or equal to the twelfth threshold; The bandwidth of the fifth frequency domain unit is greater than or equal to the thirteenth threshold; The frequency domain interval between the fifth frequency domain unit and the eighth frequency domain unit is greater than or equal to the fourteenth threshold, and the eighth frequency domain unit includes the frequency domain units of the first cell other than the fifth frequency domain unit.

15. The method according to any one of claims 1 to 14, wherein, The fourth reference signal transmitted in the second mode satisfies at least one of the following: The fourth reference signal transmitted in at least one frequency domain unit of the fifth frequency domain unit may or may not overlap in the time domain; The fourth reference signal transmitted on at least one frequency domain unit of the fifth frequency domain unit may have the same or different numbers. The number of fourth reference signals transmitted on at least one frequency domain unit included in the fifth frequency domain unit may be the same or different.

16. The method according to any one of claims 1 to 15, wherein, The fourth reference signal transmitted in each frequency domain unit of the fifth frequency domain unit is numbered independently; Alternatively, the fourth reference signals transmitted on multiple frequency domain units in the fifth frequency domain unit are jointly numbered.

17. The method according to any one of claims 1 to 16, wherein, The first transmission parameters of the fourth reference signal and system information block transmitted on the fifth frequency domain unit include at least one of the following: The first offset value is: the offset value between the subcarrier of the fourth reference signal and the subcarrier corresponding to the resource block where the fourth reference signal is located; The frequency domain location of the control resource set corresponding to the system message; The second offset value is the offset between the resource block where the fourth reference signal is located and the starting position of the channel bandwidth resource block. The transmission parameters of the fourth reference signal; Initial bandwidth portion BWP.

18. The method according to claim 17, wherein, Different frequency domain units in the fifth frequency domain unit use the same second transmission parameter; or, different frequency domain units in the fifth frequency domain unit use different third transmission parameters. The second transmission parameter includes at least some of the parameters in the first transmission parameter, and the third transmission parameter includes at least some of the parameters in the first transmission parameter.

19. The method according to any one of claims 1 to 18, wherein, When the communication device transmits the first reference signal on the first frequency domain unit and the third reference signal on the fourth frequency domain unit, the first reference signal or the system message transmitted on the first frequency domain unit includes fourth indication information; The fourth indication information is used to indicate at least one of the following: Frequency domain information of the third reference signal corresponding to the first operator of the communication device; Frequency domain information of the third reference signal corresponding to the second operator; Frequency domain information corresponding to the first device type; The first operator is different from the second operator.

20. A reference signal transmission device, wherein, Applied to communication equipment, the device includes: The transmission module is configured to perform at least one of the following: A first reference signal is transmitted in a first frequency domain cell of the first cell, and at least one of the following is performed: the first reference signal is not transmitted in a second frequency domain cell of the first cell, and a second reference signal is transmitted in a first mode in a third frequency domain cell of the first cell; A third reference signal is transmitted on the fourth frequency domain cell of the first cell, and the third reference signal is triggered on demand; The fourth reference signal is transmitted in the second mode on the fifth frequency domain cell of the first cell.

21. The apparatus according to claim 20, wherein, If the first condition is met, the first reference signal is not transmitted in the second frequency domain unit; The first condition includes at least one of the following: The deviation between the transmission timing of the first frequency domain unit and the transmission timing of the second frequency domain unit is less than or equal to a first threshold; The frequency domain spacing between the first frequency domain unit and the second frequency domain unit is less than or equal to the second threshold; The deviation between the signal quality of the first frequency domain unit and the signal quality of the second frequency domain unit is less than or equal to a third threshold.

22. The apparatus according to claim 20 or 21, wherein, The transmission module is also used for: Transmit the first instruction information; The first indication information is used to indicate at least one of the following: Does the second frequency domain unit transmit a reference signal? The frequency domain cell in the first cell that transmits the reference signal; The first cell does not have a frequency domain cell that transmits a reference signal; The transmission mode of the reference signal on the frequency domain cell of the first cell.

23. The apparatus according to any one of claims 20 to 22, wherein, If the third condition is met, the third reference signal is transmitted on the fourth frequency domain unit; The third condition includes at least one of the following: The deviation between the transmission timing of the first frequency domain unit and the transmission timing of the fourth frequency domain unit is greater than or equal to the seventh threshold. The frequency domain spacing between the first frequency domain unit and the fourth frequency domain unit is greater than or equal to the eighth threshold; The signal quality of the fourth frequency domain unit is less than or equal to the ninth threshold; First business arrives; At least some of the communication devices corresponding to the fourth frequency domain unit undergo beam switching; The signal quality of the fourth frequency domain unit is less than or equal to the tenth threshold.

24. The apparatus according to any one of claims 20 to 23, wherein, The transmission module is also used for: When the communication device is a first communication device, second instruction information is transmitted; Alternatively, if the communication device is a second communication device, an uplink request signal may be transmitted; The second indication information is used to indicate that the third reference signal is transmitted on at least one frequency domain unit included in the fourth frequency domain unit; The uplink request signal is used to request the transmission of the third reference signal on at least one frequency domain unit included in the fourth frequency domain unit.

25. The apparatus according to any one of claims 20 to 24, wherein, The transmission module is also configured to perform at least one of the following: Random access messages are transmitted in at least one of the first frequency domain unit and the sixth frequency domain unit, wherein the sixth frequency domain unit includes at least one of the following: the second frequency domain unit, the third frequency domain unit, the fourth frequency domain unit, and the fifth frequency domain unit; Transmit third indication information, the third indication information being used to transmit random access messages on at least one of the first frequency domain unit and the sixth frequency domain unit; Paging messages are transmitted in at least one of the first frequency domain unit and the sixth frequency domain unit.

26. The apparatus according to any one of claims 20 to 25, wherein, The device further includes: The processing module is used to perform one of the following: The reference signal is searched in the first frequency domain unit, but not in the seventh frequency domain unit, wherein the seventh frequency domain unit includes at least one of the second frequency domain unit and the third frequency domain unit; The reference signal is first searched in the first frequency domain unit, and if the fourth condition is met, the reference signal is searched in the seventh frequency domain unit. Search for a reference signal in the first frequency domain unit; Search for a reference signal in the seventh frequency domain unit; In the first frequency domain unit and the seventh frequency domain unit, a reference signal is searched in the frequency domain unit corresponding to the search type.

27. The apparatus according to any one of claims 20 to 26, wherein, If the fifth condition is met, the fourth reference signal is transmitted in the second mode on the fifth frequency domain unit; The fifth condition includes at least one of the following: The bandwidth of the fifth frequency domain unit is less than or equal to the twelfth threshold; The bandwidth of the fifth frequency domain unit is greater than or equal to the thirteenth threshold; The frequency domain interval between the fifth frequency domain unit and the eighth frequency domain unit is greater than or equal to the fourteenth threshold, and the eighth frequency domain unit includes the frequency domain units of the first cell other than the fifth frequency domain unit.

28. The apparatus according to any one of claims 20 to 27, wherein, The fourth reference signal transmitted in the second mode satisfies at least one of the following: The fourth reference signal transmitted in at least one frequency domain unit of the fifth frequency domain unit may or may not overlap in the time domain; The fourth reference signal transmitted on at least one frequency domain unit of the fifth frequency domain unit may have the same or different numbers. The number of fourth reference signals transmitted on at least one frequency domain unit included in the fifth frequency domain unit may be the same or different.

29. The apparatus according to any one of claims 20 to 28, wherein, The first transmission parameters of the fourth reference signal and system information block transmitted on the fifth frequency domain unit include at least one of the following: The first offset value is: the offset value between the subcarrier of the fourth reference signal and the subcarrier corresponding to the resource block where the fourth reference signal is located; The frequency domain location of the control resource set corresponding to the system message; The second offset value is the offset between the resource block where the fourth reference signal is located and the starting position of the channel bandwidth resource block. The transmission parameters of the fourth reference signal; Initial bandwidth portion BWP.

30. The apparatus according to any one of claims 20 to 29, wherein, When the transmission module transmits the first reference signal on the first frequency domain unit and the third reference signal on the fourth frequency domain unit, the first reference signal or the system message transmitted on the first frequency domain unit includes fourth indication information. The fourth indication information is used to indicate at least one of the following: Frequency domain information of the third reference signal corresponding to the first operator of the communication device; Frequency domain information of the third reference signal corresponding to the second operator; Frequency domain information corresponding to the first device type; The first operator is different from the second operator.

31. A communication device, wherein, The communication device includes a processor and a memory, the memory storing programs or instructions that can run on the processor, the programs or instructions being executed by the processor to implement the steps of the reference signal transmission method as described in any one of claims 1 to 19.

32. A readable storage medium, wherein, The readable storage medium stores a program or instructions that, when executed by a processor, implement the steps of the reference signal transmission method as described in any one of claims 1 to 19.

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