Communication method and communication device

Abstract

The present application relates to a communication method and a communication device. The method comprises: a first communication device uses an access mode to send access information and a reference signal related to the access information. According to embodiments of the present application, access information and a reference signal related to the access information are sent by using an access mode, so that the occupation of communication resources can be reduced.

Description

Communication method and communication device Technical Field

[0001] The present application relates to the field of communications, and more specifically, to a communication method and a communication device. Background Art

[0002] Random access can include four-step random access and two-step random access. Due to the complexity and time-varying nature of the wireless channel environment, during the random access process, the transmitter usually needs to allocate different information transmission resources and reference signal transmission resources at different resource locations, resulting in relatively low transmission resource utilization.

[0003] Summary of the Invention

[0004] The embodiments of the present application provide a communication method and a communication device, which can reduce the occupation of communication resources.

[0005] An embodiment of the present application provides a communication method, including: a first communication device uses an access mode to send access information and a reference signal related to the access information.

[0006] An embodiment of the present application provides a communication method, including: a second communication device adopts an access mode to receive access information and a reference signal related to the access information.

[0007] An embodiment of the present application provides a first communication device, including: a first sending unit, configured to send access information and a reference signal related to the access information using an access mode.

[0008] An embodiment of the present application provides a second communication device, including: a second receiving unit, configured to receive access information and a reference signal related to the access information using an access mode.

[0009] An embodiment of the present application provides a communication device, comprising: a transceiver, a processor, and a memory. The memory is used to store a computer program, the transceiver is used to communicate with other devices, and the processor is used to call and execute the computer program stored in the memory so that the communication device performs the above-mentioned communication method.

[0010] An embodiment of the present application provides a chip for implementing the above-mentioned communication method.

[0011] Specifically, the chip includes: a processor, which is used to call and run a computer program from a memory, so that a device equipped with the chip executes the above-mentioned communication method.

[0012] An embodiment of the present application provides a computer-readable storage medium for storing a computer program, which, when executed by a device, enables the device to execute the above-mentioned communication method.

[0013] An embodiment of the present application provides a computer program product, including computer program instructions, which enable a computer to execute the above-mentioned communication method.

[0014] An embodiment of the present application provides a computer program, which, when executed on a computer, enables the computer to execute the above-mentioned communication method.

[0015] In the embodiment of the present application, access information and a reference signal related to the access information are sent using an access mode, which can reduce the occupation of communication resources. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] FIG1 is a schematic diagram of an application scenario according to an embodiment of the present application.

[0017] FIG2 is a schematic diagram of a four-step RACH process.

[0018] FIG3 is a schematic flowchart of a communication method according to an embodiment of the present application.

[0019] FIG4 is a schematic flowchart of a communication method according to another embodiment of the present application.

[0020] FIG5 is a schematic flowchart of a communication method according to another embodiment of the present application.

[0021] FIG6 is a schematic flowchart of a communication method according to an embodiment of the present application.

[0022] FIG7 is a schematic flowchart of a communication method according to another embodiment of the present application.

[0023] FIG8 is a schematic flowchart of a communication method according to another embodiment of the present application.

[0024] FIG9 is a schematic diagram of a base station configuring a first access mode for a UE.

[0025] FIG10 is a schematic diagram of a UE configuring a first access mode to a base station.

[0026] FIG11 is a schematic diagram of a base station configuring a second access mode for a UE.

[0027] FIG12 is a schematic diagram of the UE configuring the second access mode to the base station.

[0028] FIG13 is a schematic block diagram of a first communication device according to an embodiment of the present application.

[0029] FIG14 is a schematic block diagram of a second communication device according to an embodiment of the present application.

[0030] FIG15 is a schematic block diagram of a communication device according to an embodiment of the present application.

[0031] FIG16 is a schematic block diagram of a chip according to an embodiment of the present application.

[0032] FIG17 is a schematic block diagram of a communication system according to an embodiment of the present application. DETAILED DESCRIPTION

[0033] The technical solutions in the embodiments of the present application will be described below in conjunction with the drawings in the embodiments of the present application.

[0034] The technical solutions of the embodiments of the present application can be applied to various communication systems, such as: Long Term Evolution (LTE) system, Advanced Long Term Evolution (LTE-A) system, New Radio (NR) system, NR system evolution system, LTE on unlicensed spectrum (LTE-U) system, NR on unlicensed spectrum (NR-based access to unlicensed spectrum, NR-U) system, Non-Terrestrial Networks (NTN) system, Universal Mobile Telecommunication System (UMTS), Wireless Local Area Networks (WLAN), Wireless Fidelity (WiFi), Fifth Generation (5G) system or other communication systems.

[0035] Generally speaking, traditional communication systems support a limited number of connections and are easy to implement. However, with the development of communication technology, mobile communication systems will not only support traditional communications, but will also support, for example, device-to-device (D2D) communication, machine-to-machine (M2M) communication, machine-type communication (MTC), vehicle-to-vehicle (V2V) communication, or vehicle-to-everything (V2X) communication, etc. The embodiments of the present application can also be applied to these communication systems.

[0036] In one embodiment, the communication system in the embodiment of the present application can be applied to a carrier aggregation (CA) scenario, a dual connectivity (DC) scenario, and a standalone (SA) networking scenario.

[0037] In one embodiment, the communication system in the embodiment of the present application can be applied to an unlicensed spectrum, wherein the unlicensed spectrum can also be considered as a shared spectrum; or, the communication system in the embodiment of the present application can also be applied to an authorized spectrum, wherein the authorized spectrum can also be considered as an unshared spectrum.

[0038] The embodiments of the present application describe various embodiments in conjunction with network devices and terminal devices, wherein the terminal device may also be referred to as user equipment (UE), access terminal, user unit, user station, mobile station, mobile station, remote station, remote terminal, mobile device, user terminal, terminal, wireless communication device, user agent or user device, etc.

[0039] The terminal device can be a station (STAION, ST) in a WLAN, a cellular phone, a cordless phone, a Session Initiation Protocol (SIP) phone, a Wireless Local Loop (WLL) station, a Personal Digital Assistant (PDA) device, a handheld device with wireless communication capabilities, a computing device or other processing device connected to a wireless modem, a vehicle-mounted device, a wearable device, a terminal device in a next-generation communication system such as an NR network, or a terminal device in a future evolved Public Land Mobile Network (PLMN) network, etc.

[0040] In an embodiment of the present application, the terminal device can be deployed on land, including indoors or outdoors, handheld, wearable or vehicle-mounted; it can also be deployed on the water surface (such as ships, etc.); it can also be deployed in the air (such as airplanes, balloons and satellites, etc.).

[0041] In an embodiment of the present application, the terminal device may be a mobile phone, a tablet computer, a computer with wireless transceiver function, a virtual reality (VR) terminal device, an augmented reality (AR) terminal device, a wireless terminal device in industrial control, a wireless terminal device in self-driving, a wireless terminal device in remote medical, a wireless terminal device in a smart grid, a wireless terminal device in transportation safety, a wireless terminal device in a smart city, or a wireless terminal device in a smart home, etc.

[0042] As an example and not a limitation, in the embodiment of the present application, the terminal device may also be a wearable device. Wearable devices may also be called wearable smart devices, which are a general term for wearable devices that are intelligently designed and developed using wearable technology for daily wear, such as glasses, gloves, watches, clothing, and shoes. A wearable device is a portable device that is worn directly on the body or integrated into the user's clothes or accessories. Wearable devices are not only hardware devices, but also achieve powerful functions through software support, data interaction, and cloud interaction. Broadly speaking, wearable smart devices include those that are fully functional, large in size, and can achieve complete or partial functions without relying on smartphones, such as smart watches or smart glasses, as well as those that only focus on a certain type of application function and need to be used in conjunction with other devices such as smartphones, such as various smart bracelets and smart jewelry for vital sign monitoring.

[0043] In an embodiment of the present application, the network device may be a device for communicating with a mobile device. The network device may be an access point (AP) in a WLAN, an evolved base station (eNB or eNodeB) in LTE, or a relay station or access point, or a vehicle-mounted device, a wearable device, and a network device (gNB) in an NR network, or a network device in a future evolved PLMN network or a network device in an NTN network, etc.

[0044] As an example and not a limitation, in an embodiment of the present application, the network device may have a mobile feature, for example, the network device may be a mobile device. Alternatively, the network device may be a satellite or a balloon station. For example, the satellite may be a low earth orbit (LEO) satellite, a medium earth orbit (MEO) satellite, a geostationary earth orbit (GEO) satellite, a high elliptical orbit (HEO) satellite, etc. Optionally, the network device may also be a base station set up in a location such as land or water.

[0045] In an embodiment of the present application, the network device can provide services for a cell, and the terminal device communicates with the network device through the transmission resources used by the cell (for example, frequency domain resources, or spectrum resources). The cell can be a cell corresponding to the network device (for example, a base station). The cell can belong to a macro base station or a base station corresponding to a small cell. The small cells here may include: metro cells, micro cells, pico cells, femto cells, etc. These small cells have the characteristics of small coverage and low transmission power, and are suitable for providing high-speed data transmission services.

[0046] FIG1 exemplarily illustrates a communication system 100. The communication system includes a network device 110 and two terminal devices 120. In one embodiment, the communication system 100 may include multiple network devices 110, and each network device 110 may include a different number of terminal devices 120 within its coverage area, which is not limited in this embodiment of the present application.

[0047] In one embodiment, the communication system 100 may further include other network entities such as a Mobility Management Entity (MME) and an Access and Mobility Management Function (AMF), which is not limited in this embodiment of the present application.

[0048] Among them, the network equipment may include access network equipment and core network equipment. That is, the wireless communication system also includes multiple core networks for communicating with the access network equipment. The access network equipment can be an evolutionary base station (evolutional node B, abbreviated as eNB or e-NodeB) macro base station, micro base station (also called "small base station"), pico base station, access point (AP), transmission point (TP) or new generation base station (new generation Node B, gNodeB), etc. in a long-term evolution (LTE) system, a next-generation (mobile communication system) (next radio, NR) system or an authorized auxiliary access long-term evolution (LAA-LTE) system.

[0049] It should be understood that in the embodiments of the present application, a device having a communication function in a network / system may be referred to as a communication device. Taking the communication system shown in Figure 1 as an example, the communication device may include a network device and a terminal device having a communication function. The network device and the terminal device may be specific devices in the embodiments of the present application and will not be described in detail here. The communication device may also include other devices in the communication system, such as a network controller, a mobility management entity, and other network entities, which are not limited in the embodiments of the present application.

[0050] It should be understood that the terms "system" and "network" are often used interchangeably herein. The term "and / or" is simply a description of an association between related objects, indicating that three possible relationships exist. For example, "A and / or B" can represent: A exists alone, A and B exist simultaneously, or B exists alone. Furthermore, the character " / " generally indicates that the related objects are in an "or" relationship.

[0051] It should be understood that the "indication" mentioned in the embodiments of this application can be a direct indication, an indirect indication, or an indication of an association. For example, "A indicates B" can mean that A directly indicates B, for example, B can be obtained through A; it can also mean that A indirectly indicates B, for example, A indicates C, and B can be obtained through C; it can also mean that there is an association between A and B.

[0052] In the description of the embodiments of the present application, the term "corresponding" may indicate a direct or indirect correspondence between the two, or an association relationship between the two, or a relationship between indication and being indicated, configuration and being configured, etc.

[0053] To facilitate understanding of the technical solutions of the embodiments of the present application, the relevant technologies of the embodiments of the present application are described below. The following relevant technologies can be arbitrarily combined with the technical solutions of the embodiments of the present application as optional solutions, and they all fall within the protection scope of the embodiments of the present application.

[0054] In 5G systems, the random access process can adopt a four-step process similar to LTE. An example of a four-step RACH process is shown in Figure 2:

[0055] Step 1: Preamble transmission. The UE sends a random access preamble sequence (message 1, MSG1) to the gNB.

[0056] Step 2: After detecting that a UE has sent an access preamble, the base station sends a random access response (RAR, also known as message 2, MSG2) to the UE to inform the UE of the uplink resource information that can be used when sending MSG3 (message 3, MSG3), allocates a temporary radio network temporary identifier (RNTI) to the UE, and provides the UE with a time advance command, etc.

[0057] Step 3: After receiving the random access response (RAR), the UE sends a MSG3 message in the uplink resource specified by the random access response message, such as MSG3 on the PUSCH, which may carry a UE-specific temporary identification information.

[0058] Step 4: The base station sends the MSG4 message to the UE, which may include a contention resolution message and allocates uplink transmission resources for the UE. Upon receiving the MSG4 message, the UE checks whether the UE-specific temporary identifier sent in MSG3 is included in the contention resolution message. If so, the UE's random access procedure is successful. Otherwise, the random access procedure is considered unsuccessful and the UE must initiate the random access procedure again from step 1.

[0059] During the random access process, MSG2 (RAR), MSG3 (uplink), and MSG4 (downlink) require the transmission of corresponding data information on the corresponding uplink and downlink channels. Due to the complexity and time-varying nature of the wireless channel environment, the transmitter must allocate information data symbols and specific pilot symbols (reference signals), such as the Demodulation Reference Signal (DMRS), to different resource locations during this process. This reference signal is used by the receiver for channel estimation, effectively resolving the MSG2, MSG3, and MSG4 information transmitted on the wireless channel.

[0060] In related schemes, the data and pilot transmissions involved in the random access process are orthogonally placed in the time and frequency domains. This means that, given a fixed total transmission resource, the increased resource overhead required for pilot transmissions means fewer resources available for data transmission, resulting in relatively low data transmission resource utilization. During the initial access process, transmission resources are very limited, and it is necessary to minimize the radio resource usage of data transmission during random access.

[0061] The communication method of the embodiment of the present application may include a scheme for superimposing and transmitting data and pilots (reference signals) in a non-orthogonal form during random access. In addition, the communication method of the embodiment of the present application may also include requirements for post-processing capabilities of data and superimposed pilot transmission. Not all receiving ends (such as UE or base station) can support the superimposed transmission scheme, so in an actual system, it is possible to introduce the determination of the use conditions and use capabilities of the superimposed transmission scheme so that the transmission and reception methods of data and data-related pilots during random access are consistent at both the transmitting and receiving ends.

[0062] FIG3 is a schematic flow chart of a communication method 300 according to an embodiment of the present application. The method can optionally be applied to the system shown in FIG1 , but is not limited thereto. The method includes at least part of the following contents.

[0063] S310. The first communication device sends access information and a reference signal related to the access information using an access mode.

[0064] In an embodiment of the present application, during random access (or a random access process), a first communications device may employ an access mode to transmit access information and a reference signal associated with the access information to a second communications device in a superimposed manner. Reference signals may be referred to as pilots. For example, a first communications device may transmit access information to a second communications device, and the first communications device may transmit a reference signal associated with the access information to the second communications device, wherein the time-frequency domain resources used to transmit the access information and the reference signal are identical or partially identical.

[0065] In one embodiment, the access information is information in random access. In this embodiment of the present application, if the first communication device is a terminal device such as a UE, the second communication device may be a network device such as a base station. In the uplink direction, the terminal device may use an access mode to send uplink access information in random access and an uplink reference signal related to the access information to the network device.

[0066] In an embodiment of the present application, if the first communication device is a network device, the second communication device may be a terminal device. In the downlink direction, the network device may use an access mode to send downlink access information and a downlink reference signal related to the access information in random access to the terminal device.

[0067] Figure 4 is a schematic flow chart of a communication method 400 according to another embodiment of the present application. The method may include one or more features of the above method. In one embodiment, the first communication device is a network device, the access mode is a first access mode, the access information is first access information, and the reference signal is a first reference signal.

[0068] In one embodiment, the first access information includes at least one of the following: a RAR message (MSG2) in four-step random access; a contention resolution message (MSG4) in four-step random access; a RAR message (MSG2) in non-contention two-step random access; or a downlink message (MSGB) in two-step random access.

[0069] In one embodiment, the first reference signal includes at least one of the following:

[0070] The RAR message (MSG2) needs to transmit a reference signal;

[0071] The reference signal on the physical downlink control channel (PDCCH) that carries the RAR message (MSG2);

[0072] The reference signal on the physical downlink shared channel (PDSCH) that carries the RAR message (MSG2);

[0073] The contention resolution message (MSG4) needs to transmit a reference signal;

[0074] The reference signal on the PDCCH carrying the contention resolution message (MSG4);

[0075] The reference signal on the PDSCH carrying the contention resolution message (MSG4);

[0076] Reference signal required to transmit downlink message (MSGB) in two-step random access;

[0077] A reference signal on the PDCCH carrying the downlink message (MSGB) in the two-step random access;

[0078] The reference signal on the PDSCH that carries the downlink message (MSGB) in the two-step random access.

[0079] For example, in four-step random access, after a first communication device, such as a network device, receives a preamble message (MSG1) from a second communication device, such as a terminal device, it can use a non-orthogonal method to superimpose a RAR message (MSG2) and the reference signal required to transmit the RAR message to the terminal device. After receiving MSG3 from the terminal device, the network device can use a non-orthogonal method to superimpose a contention resolution message (MSG4) and the reference signal on the PDCCH carrying the contention resolution message to the terminal device.

[0080] For example, in non-contention two-step random access, after the network device receives the preamble message (MSG1) from the terminal device, it can superimpose the RAR message (MSG2) and the reference signal on the PDCCH carrying the RAR message to the terminal device in a non-orthogonal manner.

[0081] For example, in two-step random access, after the network device receives the leading message (MSG1) from the terminal device, it can use a non-orthogonal form to superimpose the transmission of the downlink message (MSGB) in the two-step random access and the reference signal on the PDSCH carrying the downlink message to the terminal device.

[0082] In one embodiment, in the first access mode, the first access information and the first reference signal are transmitted on the same time-frequency domain transmission resources. In an embodiment of the present application, a first communication device, such as a network device, can adopt the first access mode to transmit the first access information and the first reference signal to a second communication device, such as a terminal device, on the same time-frequency domain transmission resources. The same time-frequency domain transmission resources may include completely identical or partially identical time-frequency transmission resources, may also include completely identical or partially identical frequency domain transmission resources, may also include completely identical or partially identical time-frequency transmission resources and frequency domain transmission resources. Time-frequency transmission resources may include one or more symbols, and frequency domain transmission resources may include resource blocks or subcarriers, etc.

[0083] In one embodiment, the transmission resources of the first access information are entirely or partially identical to the transmission resources of the first reference signal. In an embodiment of the present application, the first communications device may use the first time domain resources and the first frequency domain resources to transmit the first access information and the first reference signal. The first access information may occupy part or all of the resources of the first time domain resources, and part or all of the resources of the first frequency domain resources. The first reference signal may occupy part or all of the resources of the first time domain resources, and part or all of the resources of the first frequency domain resources. For example, the first time domain resources include OFDM symbol 0 to OFDM symbol 13, and the first frequency domain resources include RB 1 to RB12. The first access information occupies symbols 1, 3, 5, 6, 9, 11, and 13, and the first reference signal occupies symbols 3, 4, and 5. And / or, the first access information occupies RB1 to RB8, the first reference signal occupies RB5 and RB6, or the first reference signal occupies a specific subcarrier in RB1 to RB8, such as subcarrier n.

[0084] In one embodiment, the first access mode, the transmission scheme of the first access information, the transmission scheme of the first reference signal, the scope of use of the first access information applicable to the first access mode, the configuration information of the first reference signal, and whether at least one of the first access mode is supported are predefined.

[0085] In one embodiment, the method also includes: S410, the first communication device sends first information, the first information is used to indicate the first access mode, the transmission scheme of the first access information, the transmission scheme of the first reference signal, the scope of use of the first access information applicable to the first access mode, the configuration information of the first reference signal, and whether at least one of the first access mode is supported.

[0086] In an embodiment of the present application, the first access mode, the transmission scheme of the first access information, the transmission scheme of the first reference signal, the scope of use of the first access information applicable to the first access mode, the configuration information of the first reference signal, and whether the first access mode is supported can be indicated by the same first information or by multiple first information. In other words, a first communication device, such as a network device, can send one or more first information to a second communication device, such as a terminal device. If multiple first information are sent, first information including different indication contents can also be sent at different times as needed.

[0087] In one embodiment, the first information is carried by at least one of the following: a broadcast message, a radio resource control (RRC) message, a downlink control information (DCI) message, a downlink message in random access, a PDCCH, a PDSCH, or a downlink channel dedicated to artificial intelligence / machine learning (AI / ML). For example, the downlink message in random access may include MSG2 and MSG4 in four-step random access; MSG2 in non-contention two-step random access; and MSGB in two-step random access.

[0088] In an embodiment of the present application, a first communication device, such as a network device, may actively send first information to a second communication device, such as a terminal device, or may send first information to the second communication device in response to a request from the second communication device.

[0089] For example, the first information may indicate the specific content of the first access mode, or may indicate at least one of whether the first access mode is adopted, the type of the adopted first access mode, the configuration of the adopted first access mode (configuration information), etc. An example of the first information indicating the first access mode may include: the network device indicates to the terminal device through the broadcast message SIB1 or SIB2 that the first access information and the first reference signal are transmitted on the same time-frequency domain transmission resource. The type of the first access mode adopted may include different second access information, different second access information transmission-related second pilots, etc.

[0090] For another example, the first information may indicate the specific content of the transmission scheme of the first access information, or may indicate an identifier of the transmission scheme of the first access information. An example in which the first information indicates the transmission scheme of the first access information may include: the network device indicates the transmission scheme of the first access information to the terminal device via RRC. The specific content of the transmission scheme of the first access information may include different second access information, different second pilots related to the transmission of the second access information, a combination of different transmission configurations (resources, power, sequence, modulation, etc.), etc.

[0091] For another example, the first information may indicate specific content of the transmission scheme of the first reference signal, or may indicate an identifier of the transmission scheme of the first reference signal. An example in which the first information indicates the transmission scheme of the first reference signal may include: the network device indicates the transmission scheme of the first reference signal to the terminal device via the PDCCH (including DCI).

[0092] In one embodiment, the method also includes: S420, the first communication device receives second information, and the second information is used to indicate or request configuration of the first access mode, the transmission scheme of the first access information, the transmission scheme of the first reference signal, the scope of use of the first access information applicable to the first access mode, the configuration information of the first reference signal, and whether at least one of the first access mode is supported.

[0093] In this embodiment of the present application, a first communication device, such as a network device, may receive second information from a second communication device, such as a terminal device. If the second information is used to request the network device to configure the first access mode for the terminal device, the network device may send the first information to the terminal device based on the second information. Therefore, S420 may also be performed before S410 or in any order relative to S410.

[0094] In one embodiment, the second information is carried by at least one of the following: device capability reporting information, an RRC message, a UCI message, an uplink message in random access, a PUCCH, a PUSCH, or an AI / ML-dedicated uplink channel. For example, the device capability reporting information includes UE capability reporting information. For another example, the uplink message in random access may include MSG1 and MSG3 in four-step random access; MSG1 in non-contention two-step random access; and MSGA in two-step random access.

[0095] For example, the second information may indicate or request the specific content of configuring the first access mode, and may also indicate at least one of whether to adopt the first access mode, the type of the adopted first access mode, the configuration status (configuration information) of the adopted first access mode, etc. An example in which the second information indicates the first access mode may include: the network device receives UE capability reporting information sent by the terminal device, and the UE capability reporting information requests the network device to configure the first access information and the first reference signal to be transmitted on the same time-frequency domain transmission resources.

[0096] For another example, the second information may indicate specific content of the transmission scheme of the first access information, or may indicate an identifier of the transmission scheme of the first access information. An example in which the second information indicates the transmission scheme of the first access information may include: the network device receives an RRC message from the terminal device, and the RRC message may indicate the transmission scheme of the first access information.

[0097] For another example, the second information may indicate specific content of the transmission scheme of the first reference signal, or may indicate an identifier of the transmission scheme of the first reference signal. An example in which the second information indicates the transmission scheme of the first reference signal may include: the network device receives a PUCCH (including UCI) from the terminal device, where the UCI may indicate the transmission scheme of the first reference signal.

[0098] In one embodiment, the first access mode is applicable to a usage scope of the first access information including at least one of the following:

[0099] The first reference signal transmitted by the RAR message is transmitted using the first access mode;

[0100] The first reference signal of the PDCCH of the RAR message is transmitted using the first access mode;

[0101] The first reference signal of the PDSCH of the RAR message is transmitted using the first access mode;

[0102] The first reference signal transmitted by the contention resolution message is transmitted using the first access mode;

[0103] The first reference signal of the PDCCH of the contention resolution message is transmitted using the first access mode;

[0104] The first reference signal of the PDSCH of the contention resolution message is transmitted using the first access mode;

[0105] The first reference signal of the downlink message transmission in the two-step random access is transmitted using the first access mode;

[0106] The first reference signal of the PDCCH of the downlink message in the two-step random access is transmitted using the first access mode;

[0107] The first reference signal of the PDSCH of the downlink message in the two-step random access is transmitted using the first access mode.

[0108] In one embodiment, the configuration information of the first reference signal includes at least one of the following: transmission resources of the first reference signal; transmission power of the first reference signal; sequence information of the first reference signal; and modulation information of the first reference signal.

[0109] For example, the transmission resources of the first reference signal may include one or more symbols within the time domain transmission range of the first access information; and / or one or more resource blocks or subcarriers within the frequency domain transmission range of the first access information.

[0110] For another example, the transmission power of the first reference signal may include: first reference signal transmission, which may use a fixed first reference signal transmission power; or a fixed ratio or difference between the first reference signal transmission power and the reference power. The reference power may be the total power of the first access information transmission and the first reference signal transmission, or the power of the first access information transmission, or a specific reference power (such as the transmission power of the SSB, the transmission power of the PBCH, the transmission power of the DMRS of the PBCH, etc.).

[0111] Figure 5 is a schematic flow chart of a communication method 500 according to another embodiment of the present application. The method may include one or more features of the above method. In one embodiment, the first communication device is a terminal device, the access mode is a second access mode, the access information is second access information, and the reference signal is a second reference signal.

[0112] In one embodiment, the second access information includes at least one of the following: a preamble message (MSG1) in four-step random access; an uplink message (MSG3) in four-step random access; a preamble message (MSG1) in non-contention two-step random access; and an uplink message (MSGA) in two-step random access.

[0113] In one embodiment, the second reference signal includes at least one of the following:

[0114] The preamble message (MSG1) needs to transmit a reference signal;

[0115] The reference signal on the PDCCH carrying the uplink message (MSG3) in the four-step random access;

[0116] The reference signal on the PDSCH carrying the uplink message (MSG3) in the four-step random access;

[0117] A reference signal that needs to be transmitted for the uplink message (MSGA) in the two-step random access;

[0118] A reference signal on the PDCCH carrying the uplink message (MSGA) in the two-step random access;

[0119] The reference signal on the PDSCH that carries the uplink message (MSGA) in the two-step random access.

[0120] For example, in four-step random access, after a first communication device, such as a terminal device, transmits a preamble message (MSG1) and a reference signal (or data) required to be transmitted by the preamble message (MSG1) in a non-orthogonal manner to a second communication device, such as a network device, the terminal device can receive a RAR message (MSG2) and a reference signal required to be transmitted by the RAR message in a superimposed manner from the network device. After the terminal device sends MSG3 and a reference signal on the PDCCH carrying MSG3 to the network device in a non-orthogonal manner, it can receive a contention resolution message (MSG4) and a reference signal on the PDCCH carrying the contention resolution message in a superimposed manner from the network device.

[0121] For example, in non-contention two-step random access, after the terminal device transmits the preamble message (MSG1) and data to the network device in a non-orthogonal form, the terminal device can receive the RAR message (MSG2) superimposedly transmitted from the network device and the reference signal on the PDCCH carrying the RAR message.

[0122] For example, in two-step random access, after the terminal device transmits an uplink message (MSGA) and data to the network device in a non-orthogonal form, the terminal device can receive the downlink message (MSGB) in the two-step random access superimposed transmission from the network device and the reference signal on the PDSCH carrying the downlink message.

[0123] In one embodiment, in the second access mode, the second access information and the second reference signal are transmitted on the same time-frequency domain transmission resources.

[0124] In one embodiment, the transmission resources of the second access information are completely identical or partially identical to the transmission resources of the second reference signal. In an embodiment of the present application, a first communication device, such as a terminal device, can adopt a second access mode on the same time-frequency domain transmission resources to transmit the second access information and the second reference signal to a second communication device, such as a network device. The same time-frequency domain transmission resources may include completely identical or partially identical time-frequency transmission resources, may also include completely identical or partially identical frequency domain transmission resources, may also include completely identical or partially identical time-frequency transmission resources and frequency domain transmission resources. Time-frequency transmission resources may include one or more symbols, and frequency domain transmission resources may include resource blocks or subcarriers, etc.

[0125] In one embodiment, the second access mode, the transmission scheme of the second access information, the transmission scheme of the second reference signal, the scope of use of the second access information applicable to the second access mode, the configuration information of the second reference signal, and whether at least one of the second access mode is supported are predefined.

[0126] In an embodiment of the present application, the first communication device may use the second time domain resources and the second frequency domain resources to transmit the second access information and the second reference signal. The second access information may occupy part or all of the resources of the second time domain resources, and part or all of the resources of the second frequency domain resources. The second reference signal may occupy part or all of the resources of the second time domain resources, and part or all of the resources of the second frequency domain resources. For example, the second time domain resources include OFDM symbols 9 to OFDM symbols 13, and the second frequency domain resources include RB13 to RB16. The second access information occupies symbols 9 to 13, and the second reference signal occupies symbols 9 and 11. And / or, the second access information occupies RB13 to RB16, and the second reference signal occupies symbols RB13 and RB16.

[0127] In one embodiment, the method also includes: S510, the first communication device receives third information, and the third information is used to indicate at least one of the second access mode, the transmission scheme of the second access information, the transmission scheme of the second reference signal, the scope of use of the second access information applicable to the second access mode, the configuration information of the second reference signal, and whether the second access mode is supported.

[0128] In an embodiment of the present application, the second access mode, the transmission scheme of the second access information, the transmission scheme of the second reference signal, the scope of use of the second access information applicable to the second access mode, the configuration information of the second reference signal, and whether the second access mode is supported can be indicated by the same third information or by multiple third information. In other words, a first communication device, such as a terminal device, can send one or more third information to a second communication device, such as a network device. If multiple third information is sent, third information including different indication contents can also be sent at different times according to needs.

[0129] In one embodiment, the third information is carried by at least one of the following: a broadcast message, an RRC message, a DCI message, a downlink message in random access, a PDCCH, a PDSCH, and an AI / ML-dedicated downlink channel.

[0130] In an embodiment of the present application, a first communication device, such as a terminal device, receives third information actively sent from a second communication device, such as a network device, and may also request the second communication device to send the third information.

[0131] For example, the third information may indicate specific content of the second access mode, or may indicate at least one of whether the second access mode is adopted, the type of the adopted second access mode, and the configuration status (configuration information) of the adopted second access mode. An example in which the third information indicates the second access mode may include: the terminal device may receive a broadcast message SIB1 or SIB2 sent by a network device, where the SIB1 or SIB2 may indicate that the second access information and the second reference signal are transmitted on the same time-frequency domain transmission resources.

[0132] For another example, the third information may indicate specific content of the transmission scheme of the second access information, or may indicate an identifier of the transmission scheme of the second access information. An example in which the third information indicates the transmission scheme of the second access information may include: the terminal device may receive an RRC sent by the network device, and the RRC may indicate the transmission scheme of the second access information.

[0133] For another example, the third information may indicate specific content of the transmission scheme of the second reference signal, or may indicate an identifier of the transmission scheme of the second reference signal. An example in which the third information indicates the transmission scheme of the second reference signal may include: the terminal device may receive a PDCCH (including DCI) sent by a network device, and the DCI may indicate the transmission scheme of the second reference signal.

[0134] In one embodiment, the method also includes: S520, the first communication device sends fourth information, and the fourth information is used to indicate or request configuration of the second access mode, the transmission scheme of the second access information, the transmission scheme of the second reference signal, the scope of use of the second access information applicable to the second access mode, the configuration information of the second reference signal, and whether at least one of the second access mode is supported.

[0135] In an embodiment of the present application, a first communication device, such as a terminal device, may send fourth information to a second communication device, such as a network device. If the fourth information is used to request the network device to configure the second access mode for the terminal device, the network device may send the third information to the terminal device based on the fourth information. Therefore, S520 may also be performed before S510 or in any order with S510.

[0136] In one embodiment, the fourth information is carried by at least one of the following: device capability reporting information, RRC message, UCI message, uplink message in random access, PUCCH, PUSCH, and AI / ML dedicated uplink channel.

[0137] In one embodiment, the second access mode is applicable to a usage scope of the second access information including at least one of the following:

[0138] The second reference signal transmitted by the preamble message is transmitted using the second access mode;

[0139] The second reference signal of the PDCCH of the uplink message in the four-step random access is transmitted using the second access mode;

[0140] The second reference signal of the PDSCH of the uplink message in the four-step random access is transmitted using the second access mode;

[0141] The second reference signal for uplink message transmission in the two-step random access is transmitted using the second access mode;

[0142] The second reference signal of the PDCCH of the uplink message in the two-step random access is transmitted using the second access mode;

[0143] The second reference signal of the PDSCH of the uplink message in the two-step random access is transmitted using the second access mode.

[0144] For example, the fourth information may indicate or request the specific content of configuring the second access mode, and may also indicate at least one of whether the second access mode is adopted, the type of the adopted second access mode, the configuration status (configuration information) of the adopted second access mode, etc. An example in which the fourth information indicates the second access mode may include: the terminal device sends UE capability reporting information to the network device, and the UE capability reporting information requests the network device to configure the second access information and the second reference signal to be transmitted on the same time-frequency domain transmission resources.

[0145] For another example, the fourth information may indicate specific content of the transmission scheme of the second access information, or may indicate an identifier of the transmission scheme of the second access information. An example in which the fourth information indicates the transmission scheme of the second access information may include: the terminal device sends an RRC message to the network device, and the RRC message may indicate the transmission scheme of the first access information.

[0146] For another example, the fourth information may indicate specific content of the transmission scheme of the second reference signal, or may indicate an identifier of the transmission scheme of the second reference signal. An example in which the fourth information indicates the transmission scheme of the second reference signal may include: the terminal device sends a PUCCH (including UCI) to the network device, where the UCI may indicate the transmission scheme of the second reference signal.

[0147] In one embodiment, the configuration information of the second reference signal includes at least one of the following: transmission resources of the second reference signal; transmission power of the second reference signal; sequence information of the second reference signal; and modulation information of the second reference signal.

[0148] For example, the transmission resources of the second reference signal may include one or more symbols within the time domain transmission range of the second access information; and / or one or more resource blocks or subcarriers within the frequency domain transmission range of the second access information.

[0149] For another example, the transmission power of the second reference signal may include: the second reference signal transmission may use a fixed second reference signal transmission power; or a fixed ratio or difference between the second reference signal transmission power and the reference power. The reference power may be the total power of the second access information transmission and the second reference signal transmission, or the power of the second access information transmission, or a specific reference power (such as the transmission power of the SSB, the transmission power of the PBCH, the transmission power of the DMRS of the PBCH, etc.).

[0150] FIG6 is a schematic flow chart of a communication method 600 according to an embodiment of the present application. The method can optionally be applied to the system shown in FIG1 , but is not limited thereto. The method includes at least part of the following contents.

[0151] S610: The second communication device receives access information and a reference signal related to the access information in an access mode.

[0152] In one embodiment, the access information is information in random access.

[0153] Figure 7 is a schematic flow chart of a communication method 700 according to another embodiment of the present application. The method may include one or more features of the above method. In one embodiment, the second communication device is a terminal device, the access mode is a first access mode, the access information is first access information, and the reference signal is a first reference signal.

[0154] In one embodiment, the first access information includes at least one of the following: a RAR message in four-step random access; a contention resolution message in four-step random access; a RAR message in non-contention two-step random access; or a downlink message in two-step random access.

[0155] In one embodiment, the first reference signal includes at least one of the following:

[0156] The reference signal that the RAR message needs to transmit;

[0157] The reference signal on the PDCCH carrying the RAR message;

[0158] The reference signal on the PDSCH carrying the RAR message;

[0159] The reference signal that the contention resolution message needs to transmit;

[0160] A reference signal on the PDCCH carrying the contention resolution message;

[0161] A reference signal on the PDSCH carrying the contention resolution message;

[0162] Reference signal required to transmit downlink message in two-step random access;

[0163] A reference signal on the PDCCH carrying the downlink message in the two-step random access;

[0164] The reference signal on the PDSCH carrying the downlink message in the two-step random access.

[0165] In one embodiment, in the first access mode, the first access information and the first reference signal are transmitted on the same time-frequency domain transmission resources.

[0166] In one implementation, the transmission resource of the first access information is completely or partially the same as the transmission resource of the first reference signal.

[0167] In one embodiment, the first access mode, the transmission scheme of the first access information, the transmission scheme of the first reference signal, the scope of use of the first access information applicable to the first access mode, the configuration information of the first reference signal, and whether at least one of the first access mode is supported are predefined.

[0168] In one embodiment, the method also includes: S710, the second communication device receives first information, the first information is used to indicate the first access mode, the transmission scheme of the first access information, the transmission scheme of the first reference signal, the scope of use of the first access information applicable to the first access mode, the configuration information of the first reference signal, and whether at least one of the first access mode is supported.

[0169] In one embodiment, the first information is carried by at least one of the following: a broadcast message, an RRC message, a DCI message, a downlink message in random access, a PDCCH, a PDSCH, and an AI / ML-dedicated downlink channel.

[0170] In one embodiment, the method further includes: S720, the second communication device sending second information, the second information being used to indicate or request configuration of at least one of the first access mode, a transmission scheme for the first access information, a transmission scheme for the first reference signal, a usage scope of the first access mode applicable to the first access information, configuration information of the first reference signal, and whether the first access mode is supported. S720 may also be performed before S710 or have no timing restrictions with S710.

[0171] In one embodiment, the second information is carried by at least one of the following: device capability reporting information, RRC message, UCI message, uplink message in random access, PUCCH, PUSCH, and AI / ML dedicated uplink channel.

[0172] In one embodiment, the first access mode is applicable to a usage scope of the first access information including at least one of the following:

[0173] The first reference signal transmitted by the RAR message is transmitted using the first access mode;

[0174] The first reference signal of the PDCCH of the RAR message is transmitted using the first access mode;

[0175] The first reference signal of the PDSCH of the RAR message is transmitted using the first access mode;

[0176] The first reference signal transmitted by the contention resolution message is transmitted using the first access mode;

[0177] The first reference signal of the PDCCH of the contention resolution message is transmitted using the first access mode;

[0178] The first reference signal of the PDSCH of the contention resolution message is transmitted using the first access mode;

[0179] The first reference signal of the downlink message transmission in the two-step random access is transmitted using the first access mode;

[0180] The first reference signal of the PDCCH of the downlink message in the two-step random access is transmitted using the first access mode;

[0181] The first reference signal of the PDSCH of the downlink message in the two-step random access is transmitted using the first access mode.

[0182] In one embodiment, the configuration information of the first reference signal includes at least one of the following: transmission resources of the first reference signal; transmission power of the first reference signal; sequence information of the first reference signal; and modulation information of the first reference signal.

[0183] Figure 8 is a schematic flow chart of a communication method 800 according to another embodiment of the present application. The method may include one or more features of the above method. In one embodiment, the second communication device is a network device, the access mode is a second access mode, the access information is second access information, and the reference signal is a second reference signal.

[0184] In one embodiment, the second access information includes at least one of the following: a preamble message in four-step random access; an uplink message in four-step random access; a preamble message in non-contention two-step random access; or an uplink message in two-step random access.

[0185] In one embodiment, the second reference signal includes at least one of the following:

[0186] The preamble message needs to transmit a reference signal;

[0187] A reference signal on the PDCCH carrying the uplink message in the four-step random access;

[0188] A reference signal on the PDSCH carrying the uplink message in the four-step random access;

[0189] A reference signal that needs to be transmitted for the uplink message in the two-step random access;

[0190] A reference signal on the PDCCH carrying the uplink message in the two-step random access;

[0191] The reference signal on the PDSCH that carries the uplink message in the two-step random access.

[0192] In one embodiment, in the second access mode, the second access information and the second reference signal are transmitted on the same time-frequency domain transmission resources.

[0193] In one implementation, the transmission resource of the second access information is completely or partially the same as the transmission resource of the second reference signal.

[0194] In one embodiment, the second access mode, the transmission scheme of the second access information, the transmission scheme of the second reference signal, the scope of use of the second access information applicable to the second access mode, the configuration information of the second reference signal, and whether at least one of the second access mode is supported are predefined.

[0195] In one embodiment, the method also includes: S810, the second communication device sends third information, and the third information is used to indicate at least one of the second access mode, the transmission scheme of the second access information, the transmission scheme of the second reference signal, the scope of use of the second access information applicable to the second access mode, the configuration information of the second reference signal, and whether the second access mode is supported.

[0196] In one embodiment, the third information is carried by at least one of the following: a broadcast message, an RRC message, a DCI message, a downlink message in random access, a PDCCH, a PDSCH, and an AI / ML-dedicated downlink channel.

[0197] In one embodiment, the method further includes: S820, the second communication device receiving fourth information, the fourth information being used to indicate or request configuration of at least one of the second access mode, a transmission scheme for the second access information, a transmission scheme for the second reference signal, a usage scope of the second access information applicable to the second access mode, configuration information of the second reference signal, and whether the second access mode is supported. S820 may also be performed before S810 or have no timing restrictions with S810.

[0198] In one embodiment, the fourth information is carried by at least one of the following: device capability reporting information, RRC message, UCI message, uplink message in random access, PUCCH, PUSCH, and AI / ML dedicated uplink channel.

[0199] In one embodiment, the second access mode is applicable to a usage scope of the second access information including at least one of the following:

[0200] The second reference signal transmitted by the preamble message is transmitted using the second access mode;

[0201] The second reference signal of the PDCCH of the uplink message in the four-step random access is transmitted using the second access mode;

[0202] The second reference signal of the PDSCH of the uplink message in the four-step random access is transmitted using the second access mode;

[0203] The second reference signal for uplink message transmission in the two-step random access is transmitted using the second access mode;

[0204] The second reference signal of the PDCCH of the uplink message in the two-step random access is transmitted using the second access mode;

[0205] The second reference signal of the PDSCH of the uplink message in the two-step random access is transmitted using the second access mode.

[0206] In one embodiment, the configuration information of the second reference signal includes at least one of the following: a transmission resource of the second reference signal; a transmission power of the second reference signal; sequence information of the second reference signal; and modulation information of the second reference signal.

[0207] For specific examples of the second communication device executing methods 600, 700, and 800 of this embodiment, reference can be made to the relevant descriptions about the second communication device in the above methods 300, 400, and 500, which will not be repeated here for the sake of brevity.

[0208] The communication method of an embodiment of the present application may include a scheme for superimposing and transmitting data and pilots (reference signals) in a non-orthogonal manner during a random access process. Specifically, the method includes taking into account the uplink and downlink transmissions involved in the random access process, the differentiation of the support capabilities of the participants involved in the uplink and downlink transmissions for the superimposed transmission of initial access information and initial access-related pilots, and the provision of corresponding configuration and indication schemes for different optional combinations of initial access information and initial access-related pilot transmissions.

[0209] Example 1:

[0210] The base station adopts the first access mode to transmit the first access information and / or transmits the first pilot (reference signal) related to the first access information.

[0211] The first access information may be one or more of the following:

[0212] (1) MSG 2 (RAR message) and / or MSG 4 (contention resolution message) in 4-step random access;

[0213] (2) MSG 2 (RAR message) in non-contention 2-step random access;

[0214] (3) MSG B in two-step random access.

[0215] The first access information may be control information carried by the above message on a control channel (for example, carried on a PDCCH, such as scheduling and configuration information of MSG2, MSG4, and MSGB data information on a DCI), or;

[0216] The first access information may be data information carried by the above message on a data channel (eg, MSG2, MSG4, MSGB data information carried on PDSCH).

[0217] In the description of the first access information, the first pilot (reference signal) related to the transmission of the first access information includes one or more of the following pilots (reference signals):

[0218] (1) Pilot (reference signal) required to transmit MSG2 (RAR message);

[0219] (2) Pilot (reference signal) on the PDCCH carrying MSG2 (RAR message);

[0220] (3) Pilot (reference signal) on the PDSCH carrying MSG2 (RAR message);

[0221] (4) Pilot (reference signal) required to be transmitted for MSG4 (access contention resolution message);

[0222] (5) Pilot (reference signal) on the PDCCH carrying MSG4 (contention resolution message);

[0223] (6) Pilot (reference signal) on the PDSCH carrying MSG4 (contention resolution message);

[0224] (7) Pilot (reference signal) required to be transmitted for MSGB (downlink message for two-step random access);

[0225] (8) Pilot (reference signal) on the PDCCH carrying the MSGB (downlink message for two-step random access);

[0226] (9) Pilot (reference signal) on the PDSCH carrying MSGB (downlink message for two-step random access).

[0227] Features of the first access mode may include: in the first access mode, the first access information and the first pilot (reference signal) associated with the transmission of the first access information are transmitted on the same time-frequency domain transmission resources. The transmission resources of the first access information and the transmission resources of the first pilot (reference signal) associated with the transmission of the first access information are completely the same, or partially the same. For example, the first access information (e.g., DCI and / or data of MSG2, MSG4, and MSGB) and the pilot (reference signal, such as a DMRS signal) associated with the transmission of the first access information are transmitted simultaneously on the same time-domain and frequency-domain resources.

[0228] Examples of configuring the first access mode are as follows: The protocol may predefine the first access mode, or the base station may indicate the first access mode to the UE. The protocol may predefine, or the base station may indicate, the first pilot (reference signal) transmission scheme associated with the first access mode. The content that may be predefine by the protocol or indicated by the base station may include the first access information and / or the first pilot (reference signal) transmission scheme associated with the first access information, or an identifier corresponding to the above transmission scheme.

[0229] The base station may indicate the first access mode to the UE. As shown in FIG9 , the base station may indicate the pilot transmission scheme related to the first access information transmission through one or more of the following messages: (1) broadcast message, such as Master Information Block (MIB), System Information Block (SIB) 1, SIB; (2) RRC message; (3) DCI message; (4) downlink message in the random access process, such as MSG2; (5) PDCCH; (6) PDSCH; (7) AI / ML dedicated downlink channel.

[0230] For example, when configuring random access to the current cell in broadcast SIB1 or SIB2, the base station indicates whether to adopt the first access mode, indicates the type of the adopted first access mode, and indicates at least one of the configuration conditions of the adopted first access mode.

[0231] For example, when configuring random access to a neighboring cell, the base station indicates whether to adopt the first access mode, the type of the first access mode adopted, and at least one of the configuration conditions of the first access mode adopted when broadcasting the SIB and / or in the RRC message.

[0232] For example, the base station indicates in MSG2 whether MSG4 adopts the first access mode to transmit the first access information, indicates the type of the first access mode adopted, and indicates at least one of the configuration status of the first access mode adopted.

[0233] For example, the base station indicates the PDSCH (data) of MSG2, the PDCCH (DCI) of MSG4, the PDSCH (data) of MSG4, whether the first access mode is used to transmit the first access information, the type of the first access mode used, and at least one of the configuration conditions of the first access mode used in the PDCCH (DCI) of MSG2.

[0234] The UE may indicate and / or request the first access mode to the base station. As shown in FIG10 , the UE may indicate or request the pilot transmission scheme related to the first access information transmission through one or more of the following messages: (1) UE capability reporting indicating that the UE supports the first access mode, (2) RRC message, (3) UCI ​​message, (4) uplink message in the random access process, such as MSG1 (e.g., the transmission resource location and / or specific sequence of MSG1, which may be used to indicate that the base station may adopt the first access mode, such as adopting the first access model to transmit one or more of MSG2, MSG4, and MSGB), (5) PUCCH, (6) PUSCH, and (7) AI / ML dedicated uplink channel.

[0235] For example, the UE indicates in MSG1 (PREAMBLE transmission) whether MSG2 and / or MSG4 and / or MSGB adopt the first access mode to transmit the first access information, indicates the type of the first access mode adopted, and indicates at least one of the configuration status of the first access mode adopted.

[0236] For example, the UE indicates in MSG3 (PREAMBLE transmission) whether MSG4 adopts the first access mode to transmit the first access information, indicates the type of the first access mode adopted, and indicates at least one of the configuration status of the first access mode adopted.

[0237] Among at least one of the above-mentioned protocol predefining the first access mode, the base station configuring the first access mode to the UE, and the UE instructing and / or requesting the base station to configure the first access mode, the first access mode may be predefined, configured, or requested to apply to a usage scope of the first access information. For example, the first access mode applies to one or more of the following scopes:

[0238] (1) The pilot signal of MSG2 (RAR message) is transmitted using the first access mode;

[0239] (2) The pilot of the PDCCH of MSG2 (RAR message) adopts the first access mode for transmission;

[0240] (3) The pilot of the PDSCH of MSG2 (RAR message) adopts the first access mode transmission;

[0241] (4) The pilot signal of MSG4 (contention resolution message) is transmitted using the first access mode;

[0242] (5) The pilot of the PDCCH of MSG4 (contention resolution message) adopts the first access mode transmission;

[0243] (6) The pilot of the PDSCH of MSG4 (contention resolution message) adopts the first access mode transmission;

[0244] (7) The pilot signal of MSGB (downlink message of two-step random access) transmission adopts the first access mode transmission;

[0245] (8) The pilot of the PDCCH of MSGB (downlink message of two-step random access) adopts the first access mode transmission;

[0246] (9) The pilot of the PDSCH of MSGB (downlink message of two-step random access) adopts the first access mode for transmission.

[0247] The above-mentioned protocol predefines the first access mode, the base station can configure the first access mode to the UE, and the UE indicates and / or requests the base station to configure the first access mode. At least one of the above-mentioned protocol predefines the first access mode, the base station can predefine or configure or request specific configuration information of the first pilot (reference signal) related to the first access information transmission in the first access mode. For example, the configuration information of the first pilot (reference signal) may include one or more of the following information:

[0248] (1) Transmission resources of the first pilot (reference signal) related to the transmission of the first access information. For example, in the time domain, one or more symbols within the time domain transmission range of the first access information, and / or in the frequency domain, one or more resource blocks or subcarriers within the frequency domain transmission range of the first access information.

[0249] (2) The transmission power of the first pilot (reference signal) related to the first access information transmission. For example: the first pilot (reference signal) transmission related to the first access information transmission of the first access mode adopts a fixed first pilot (reference signal) transmission power. Or the ratio or difference between the fixed first pilot (reference signal) transmission power and the reference power. The reference power can be the total power of the first access information transmission and the first pilot transmission, the power of the first access information transmission, or a specific reference power (such as the transmission power of SSB, the transmission power of PBCH, the transmission power of DMRS of PBCH, etc.). The power information involved in the above-mentioned first power allocation scheme can also be used in the form of db (decibel), dbm (decibel milliwatt), etc. to indicate the absolute power size, or to indicate the relative power size.

[0250] (3) Sequence information of the first pilot (reference signal) related to the transmission of the first access information. Examples include gold sequence, ZC sequence, m sequence (longest linear feedback shift register sequence), all-ones sequence, special sequences processed by modulation such as Quadrature Phase Shift Keying (QPSK), 16-bit Quadrature Amplitude Modulation (QAM), and 64QAM. Another example is the training results of different AI / ML pilot sequences.

[0251] (4) Modulation information of the first pilot (reference signal) related to the transmission of the first access information, such as modulation schemes such as QPSK, 16QAM, and 64QAM, or modulation information and / or processing methods for QPSK, 16QAM, and 64QAM modulation results subjected to shifting, rotation, scaling, and other processing.

[0252] Example 2:

[0253] Similar to embodiment 1, this embodiment may include processing of an uplink signal: the UE adopts a second access mode to transmit second access information, and / or a second pilot (reference signal) related to the second access information transmission.

[0254] The second access information may be one or more of the following:

[0255] (1) MSG 1 (PREAMBLE message) and / or MSG 3 (uplink message in RACH process) in 4-step random access;

[0256] (2) MSG 1 (PREAMBLE message) in non-contention 2-step random access;

[0257] (3) MSG A in two-step random access.

[0258] The second access message may be control information carried by the above message on a control channel (for example, carried on PUCCH, such as scheduling and configuration information of MSG3 and MSGA data information on UCI).

[0259] Alternatively, the second access message may be data information carried by the above message on a data channel (eg, MSG3 and MSGA data information carried on the PUSCH).

[0260] In the description of the second access information above, the second pilot (reference signal) related to the transmission of the second access information includes one or more of the following pilots (reference signals):

[0261] (1) Pilot (reference signal) required to transmit MSG1 (PREAMBLE message);

[0262] (2) Pilot (reference signal) on the PUCCH carrying MSG3 (uplink message in the RACH process);

[0263] (3) Pilot (reference signal) on the PUSCH carrying MSG3 (uplink message in the RACH process);

[0264] (4) Pilot (reference signal) required to be transmitted for MSGA (uplink message for two-step random access);

[0265] (5) Pilot (reference signal) on the PUCCH carrying the MSGA (uplink message for two-step random access);

[0266] (6) Pilot (reference signal) on the PUSCH carrying MSGA (uplink message for two-step random access).

[0267] Features of the second access mode may include: in the second access mode, the second access information and the second pilot (reference signal) associated with the transmission of the second access information are transmitted on the same time-frequency domain transmission resources. The transmission resources of the second access information and the transmission resources of the second pilot (reference signal) associated with the transmission of the second access information are completely or partially identical. For example, the second access information (e.g., DCI and / or data of MSG3 and MSGB) and the pilot (reference signal, such as PREAMBLE and DMRS signal) associated with the transmission of the second access information are transmitted simultaneously on the same time-domain and frequency-domain resources.

[0268] Examples of configuring the second access mode are as follows: The protocol may predefine the second access mode, or the base station may indicate the second access mode to the UE. The protocol may predefine, or the base station may indicate, the second pilot (reference signal) transmission scheme associated with the second access mode. The content that may be predefine by the protocol or indicated by the base station may include the second access information and / or the second pilot (reference signal) transmission scheme associated with the second access information, or an identifier corresponding to the above transmission scheme.

[0269] The base station may indicate the second access mode to the UE. As shown in FIG11 , the base station may indicate the pilot transmission scheme related to the second access information transmission through one or more of the following messages: (1) broadcast message, such as MIB, SIB1, SIB, (2) RRC message, (3) DCI message, (4) downlink message in the random access process, such as Msg2, (5) PDCCH, (6) PDSCH, (7) AI / ML dedicated downlink channel.

[0270] For example, when configuring random access of the current cell in broadcast SIB1 or SIB2, the base station indicates whether to adopt the second access mode, indicates the type of the adopted second access mode, and indicates at least one of the configuration conditions of the adopted second access mode.

[0271] For example, when configuring random access to a neighboring cell, the base station indicates whether to adopt the second access mode, the type of the second access mode adopted, and at least one of the configuration conditions of the second access mode adopted when broadcasting the SIB and / or in the RRC message.

[0272] For example, the base station indicates in MSG2 whether MSG3 adopts the second access mode to transmit the second access information, indicates the type of the second access mode adopted, and indicates at least one of the configuration status of the second access mode adopted.

[0273] The UE may indicate and / or request the second access mode to the base station. As shown in FIG12 , the UE may indicate and / or request the pilot transmission scheme related to the second access information transmission through one or more of the following messages: (1) UE capability reporting indicating that the UE supports the second access mode, (2) RRC message, (3) UCI ​​message, (4) uplink message in the random access process, such as MSG1 (e.g., the transmission resource location and / or specific sequence of MSG1, which can be used to indicate that the UE can adopt the second access mode, such as adopting the second access model to transmit one or more of MSG3 and MSGA), (5) PUCCH, (6) PUSCH, (7) AI / ML dedicated uplink channel.

[0274] For example, the UE indicates in MSG1 (PREAMBLE message) whether MSG3 and / or MSGA adopts the second access mode to transmit the second access information, indicates the type of the second access mode adopted, and indicates at least one of the configuration status of the second access mode adopted.

[0275] The above-mentioned protocol predefines the second access mode, the base station may configure the second access mode for the UE, and the UE may indicate and / or request the base station to configure the second access mode. The second access mode may be predefined, configured, or requested to apply to the scope of use of the second access information. For example, the second access mode applies to one or more of the following scopes:

[0276] (1) The pilot signal of MSG1 (PREAMBLE message) is transmitted using the second access mode;

[0277] (2) The pilot of the PUCCH of MSG3 (uplink message in the RACH process) is transmitted using the second access mode;

[0278] (3) The pilot of the PUSCH of MSG3 (uplink message in the RACH process) is transmitted using the second access mode;

[0279] (4) The pilot signal of MSGA (uplink message of two-step random access) transmission adopts the second access mode transmission;

[0280] (5) The pilot of the PUCCH of MSGA (uplink message of two-step random access) adopts the second access mode transmission;

[0281] (6) The pilot of the PUSCH of MSGA (uplink message of two-step random access) adopts the second access mode for transmission.

[0282] The above-mentioned protocol predefines at least one of the second access mode, the base station may configure the second access mode to the UE, and the UE indicates and / or requests the base station to configure the second access mode. Specific configuration information of the second pilot (reference signal) related to the second access information transmission in the second access mode may be predefined, configured, or requested. For example, the configuration information of the second pilot (reference signal) may include one or more of the following information:

[0283] (1) Transmission resources of a second pilot (reference signal) related to the transmission of the second access information. For example, in the time domain, one or more symbols within the time domain transmission range of the first access information, and / or in the frequency domain, one or more resource blocks or subcarriers within the frequency domain transmission range of the first access information.

[0284] (2) The transmission power of the second pilot (reference signal) related to the second access information transmission. For example: the second pilot (reference signal) transmission related to the second access information transmission of the second access mode adopts a fixed second pilot (reference signal) transmission power. Or the ratio or difference between the fixed second pilot (reference signal) transmission power and the reference power. The reference power can be the total power of the second access information transmission and the second pilot transmission, the power of the second access information transmission, or a specific reference power (such as the transmission power of SSB, the transmission power of PBCH, the transmission power of DMRS of PBCH, the transmission power of PREAMBLE, etc.). The power information involved in the above-mentioned second power allocation scheme can also be used in the form of db, dbm, etc. to indicate the absolute power size, or to indicate the relative power size.

[0285] (3) Sequence information of the second pilot (reference signal) related to the second access information transmission, such as a gold sequence, a ZC sequence, an m sequence, an all-ones sequence, a specific sequence processed by QPSK, 16QAM, 64QAM, etc. Another example is the training results of different AI / ML pilot sequences.

[0286] (4) Modulation information of the second pilot (reference signal, PREAMBLE) related to the transmission of the second access information, such as QPSK, 16QAM, 64QAM, or modulation information and / or processing methods for QPSK, 16QAM, 64QAM, etc. modulation results subjected to offset, rotation, scaling, etc.

[0287] Example 3:

[0288] The base station may transmit first access information and a first pilot (reference signal) related to the transmission of the first access information to the UE using the first access mode. If the first access information is MSG 2 in a four-step random access, the first pilot (reference signal) related to the transmission of the first access information may be the pilot (reference signal) required to be transmitted by MSG 2. In addition, the first pilot (reference signal) related to the transmission of the first access information may also be a pilot (reference signal) on the PDCCH carrying MSG 2, or a pilot (reference signal) on the PDSCH carrying MSG 2.

[0289] Similarly, the first access information is MSG 4 in 4-step random access, MSG 2 in non-contention 2-step random access, or MSG B in two-step random access. The first pilot (reference signal) related to the transmission of the first access information can refer to the relevant example of MSG2 above, and examples will not be repeated here.

[0290] Example 4:

[0291] The UE transmits second access information and a second pilot (reference signal) related to the transmission of the second access information to the base station using the second access mode. If the second access information is MSG A in two-step random access, the second pilot (reference signal) related to the transmission of the second access information may be the pilot (reference signal) required to be transmitted for MSGA in two-step random access. In addition, the second pilot (reference signal) related to the transmission of the second access information may also be a pilot (reference signal) on the PUCCH carrying MSGA, or a pilot (reference signal) on the PUSCH carrying MSGA.

[0292] Similarly, if the second access information is MSG 1 in 4-step random access, MSG 3 in 4-step random access, or MSG 1 in non-contention 2-step random access, the second pilot (reference signal) related to the second access information transmission can refer to the relevant examples of MSGA above.

[0293] For the first access mode for downlink mentioned above, the network side needs to have the support capability (sending capability) for the first access mode, and the UE side needs to have the support capability (receiving capability) for the first access mode. If the network side cannot send it out, or the UE side cannot receive it (for example, it does not have the receiving capability for the superimposed transmission mode, AI receiving model, etc.), the first access mode may not work. Therefore, for the first access mode, it may also include that before configuring and / or instructing to adopt the first access mode, the network may indicate support for the first access mode, and / or the UE may indicate support for the first access mode.

[0294] For the above-mentioned second access mode for uplink, the network side needs to have the support capability (receiving capability) for the second access mode, and the UE side needs to have the support capability (sending capability) for the second access mode. If the UE side cannot send it out, or the network side cannot receive it (for example, it does not have the receiving capability for the superimposed transmission mode, AI receiving model, etc.), the second access mode may not work. Therefore, for the second access mode, it may also include that before configuring and / or instructing to adopt the second access mode, the network indicates support for the second access mode, and / or the UE indicates support for the second access mode.

[0295] The protocol predefinition, network configuration, UE indication, etc. of the above-mentioned first access mode and second access mode may be independent predefinition, configuration, and indication that distinguish the first / second access mode (distinguishing uplink and downlink, signaling), or may be unified predefinition, configuration, and indication that do not distinguish the first / second access mode (distinguishing uplink and downlink, signaling). For example, the content of the indication is to simultaneously predefine, configure, and indicate the access method for superimposed transmission of data and pilot (reference signal) in the embodiment of the present application.

[0296] The communication method of an embodiment of the present application includes a scheme for superimposing and transmitting data and pilot signals (reference signals) in a non-orthogonal manner during random access. This is a method for introducing superimposed transmission of pilot signals and data transmission during random access. After using the method of this embodiment, the pilot signal can be prevented from occupying independent initial access resources during initial transmission. Considering that transmission resources are very limited, the occupation of wireless resources by data transmission during random access can be minimized.

[0297] FIG13 is a schematic block diagram of a first communication device 1300 according to an embodiment of the present application. The first communication device 1300 may include:

[0298] The first sending unit 1301 is configured to send access information and a reference signal related to the access information by adopting an access mode.

[0299] In one embodiment, the access information is information in random access.

[0300] In one implementation, the first communication device is a network device, the access mode is a first access mode, the access information is first access information, and the reference signal is a first reference signal.

[0301] In one embodiment, the first access information includes at least one of the following:

[0302] RAR message in four-step random access;

[0303] Contention resolution message in four-step random access;

[0304] RAR message in non-contention two-step random access;

[0305] Downlink message in two-step random access.

[0306] In one embodiment, the first reference signal includes at least one of the following:

[0307] The reference signal that the RAR message needs to transmit;

[0308] The reference signal on the PDCCH carrying the RAR message;

[0309] The reference signal on the PDSCH carrying the RAR message;

[0310] The reference signal that the contention resolution message needs to transmit;

[0311] A reference signal on the PDCCH carrying the contention resolution message;

[0312] A reference signal on the PDSCH carrying the contention resolution message;

[0313] Reference signal required to transmit downlink message in two-step random access;

[0314] A reference signal on the PDCCH carrying the downlink message in the two-step random access;

[0315] The reference signal on the PDSCH carrying the downlink message in the two-step random access.

[0316] In one embodiment, in the first access mode, the first access information and the first reference signal are transmitted on the same time-frequency domain transmission resources.

[0317] In one implementation, the transmission resource of the first access information is completely or partially the same as the transmission resource of the first reference signal.

[0318] In one embodiment, the first access mode, the transmission scheme of the first access information, the transmission scheme of the first reference signal, the scope of use of the first access information applicable to the first access mode, the configuration information of the first reference signal, and whether at least one of the first access mode is supported are predefined.

[0319] In one embodiment, the first sending unit 1301 is also used to send first information, which is used to indicate the first access mode, the transmission scheme of the first access information, the transmission scheme of the first reference signal, the scope of use of the first access information applicable to the first access mode, the configuration information of the first reference signal, and whether at least one of the first access mode is supported.

[0320] In one embodiment, the first information is carried by at least one of the following: a broadcast message, an RRC message, a DCI message, a downlink message in random access, a PDCCH, a PDSCH, and an AI / ML-dedicated downlink channel.

[0321] In one embodiment, the first communication device further includes:

[0322] The first receiving unit 1302 is used to receive second information, where the second information is used to indicate or request configuration of at least one of the first access mode, the transmission scheme of the first access information, the transmission scheme of the first reference signal, the scope of use of the first access information applicable to the first access mode, the configuration information of the first reference signal, and whether the first access mode is supported.

[0323] In one embodiment, the second information is carried by at least one of the following: device capability reporting information, RRC message, UCI message, uplink message in random access, PUCCH, PUSCH, and AI / ML dedicated uplink channel.

[0324] In one embodiment, the first access mode is applicable to a usage scope of the first access information including at least one of the following:

[0325] The first reference signal transmitted by the RAR message is transmitted using the first access mode;

[0326] The first reference signal of the PDCCH of the RAR message is transmitted using the first access mode;

[0327] The first reference signal of the PDSCH of the RAR message is transmitted using the first access mode;

[0328] The first reference signal transmitted by the contention resolution message is transmitted using the first access mode;

[0329] The first reference signal of the PDCCH of the contention resolution message is transmitted using the first access mode;

[0330] The first reference signal of the PDSCH of the contention resolution message is transmitted using the first access mode;

[0331] The first reference signal of the downlink message transmission in the two-step random access is transmitted using the first access mode;

[0332] The first reference signal of the PDCCH of the downlink message in the two-step random access is transmitted using the first access mode;

[0333] The first reference signal of the PDSCH of the downlink message in the two-step random access is transmitted using the first access mode.

[0334] In one embodiment, the configuration information of the first reference signal includes at least one of the following: transmission resources of the first reference signal; transmission power of the first reference signal; sequence information of the first reference signal; and modulation information of the first reference signal.

[0335] In one implementation, the first communication device is a terminal device, the access mode is a second access mode, the access information is second access information, and the reference signal is a second reference signal.

[0336] In one embodiment, the second access information includes at least one of the following:

[0337] Preamble message in four-step random access;

[0338] Uplink message in four-step random access;

[0339] Preamble message in non-contention two-step random access;

[0340] Uplink message in two-step random access.

[0341] In one embodiment, the second reference signal includes at least one of the following:

[0342] The preamble message needs to transmit a reference signal;

[0343] A reference signal on the PDCCH carrying the uplink message in the four-step random access;

[0344] A reference signal on the PDSCH carrying the uplink message in the four-step random access;

[0345] A reference signal that needs to be transmitted for the uplink message in the two-step random access;

[0346] A reference signal on the PDCCH carrying the uplink message in the two-step random access;

[0347] The reference signal on the PDSCH that carries the uplink message in the two-step random access.

[0348] In one embodiment, in the second access mode, the second access information and the second reference signal are transmitted on the same time-frequency domain transmission resources.

[0349] In one implementation, the transmission resource of the second access information is completely or partially the same as the transmission resource of the second reference signal.

[0350] In one embodiment, the second access mode, the transmission scheme of the second access information, the transmission scheme of the second reference signal, the scope of use of the second access information applicable to the second access mode, the configuration information of the second reference signal, and whether at least one of the second access mode is supported are predefined.

[0351] In one embodiment, the first receiving unit 1302 is also used to receive third information, which is used to indicate at least one of the second access mode, the transmission scheme of the second access information, the transmission scheme of the second reference signal, the scope of use of the second access information applicable to the second access mode, the configuration information of the second reference signal, and whether the second access mode is supported.

[0352] In one embodiment, the third information is carried by at least one of the following: a broadcast message, an RRC message, a DCI message, a downlink message in random access, a PDCCH, a PDSCH, and an AI / ML-dedicated downlink channel.

[0353] In one embodiment, the first sending unit 1301 is also used to send fourth information, which is used to indicate or request configuration of the second access mode, the transmission scheme of the second access information, the transmission scheme of the second reference signal, the scope of use of the second access information applicable to the second access mode, the configuration information of the second reference signal, and whether at least one of the second access mode is supported.

[0354] In one embodiment, the fourth information is carried by at least one of the following: device capability reporting information, RRC message, UCI message, uplink message in random access, PUCCH, PUSCH, and AI / ML dedicated uplink channel.

[0355] In one embodiment, the second access mode is applicable to a usage scope of the second access information including at least one of the following:

[0356] The second reference signal transmitted by the preamble message is transmitted using the second access mode;

[0357] The second reference signal of the PDCCH of the uplink message in the four-step random access is transmitted using the second access mode;

[0358] The second reference signal of the PDSCH of the uplink message in the four-step random access is transmitted using the second access mode;

[0359] The second reference signal for uplink message transmission in the two-step random access is transmitted using the second access mode;

[0360] The second reference signal of the PDCCH of the uplink message in the two-step random access is transmitted using the second access mode;

[0361] The second reference signal of the PDSCH of the uplink message in the two-step random access is transmitted using the second access mode.

[0362] In one embodiment, the configuration information of the second reference signal includes at least one of the following: transmission resources of the second reference signal; transmission power of the second reference signal; sequence information of the second reference signal; and modulation information of the second reference signal.

[0363] The first communication device 1300 of the embodiment of the present application can implement the corresponding functions of the first communication device in the aforementioned method embodiment. The processes, functions, implementation methods and beneficial effects corresponding to the various modules (sub-modules, units or components, etc.) in the first communication device 1300 can be found in the corresponding descriptions in the above-mentioned method embodiments, and will not be repeated here. It should be noted that the functions described in the various modules (sub-modules, units or components, etc.) in the first communication device 1300 of the embodiment of the application can be implemented by different modules (sub-modules, units or components, etc.) or by the same module (sub-module, unit or component, etc.).

[0364] FIG14 is a schematic block diagram of a second communication device 1400 according to an embodiment of the present application. The second communication device 1400 may include:

[0365] The second receiving unit 1401 is configured to receive access information and a reference signal related to the access information by adopting an access mode.

[0366] In one embodiment, the access information is information in random access.

[0367] In one implementation, the second communication device is a terminal device, the access mode is a first access mode, the access information is first access information, and the reference signal is a first reference signal.

[0368] In one embodiment, the first access information includes at least one of the following:

[0369] RAR message in four-step random access;

[0370] Contention resolution message in four-step random access;

[0371] RAR message in non-contention two-step random access;

[0372] Downlink message in two-step random access.

[0373] In one embodiment, the first reference signal includes at least one of the following:

[0374] The reference signal that the RAR message needs to transmit;

[0375] The reference signal on the PDCCH carrying the RAR message;

[0376] The reference signal on the PDSCH carrying the RAR message;

[0377] The reference signal that the contention resolution message needs to transmit;

[0378] A reference signal on the PDCCH carrying the contention resolution message;

[0379] A reference signal on the PDSCH carrying the contention resolution message;

[0380] Reference signal required to transmit downlink message in two-step random access;

[0381] A reference signal on the PDCCH carrying the downlink message in the two-step random access;

[0382] The reference signal on the PDSCH carrying the downlink message in the two-step random access.

[0383] In one embodiment, in the first access mode, the first access information and the first reference signal are transmitted on the same time-frequency domain transmission resources.

[0384] In one implementation, the transmission resource of the first access information is completely or partially the same as the transmission resource of the first reference signal.

[0385] In one embodiment, the first access mode, the transmission scheme of the first access information, the transmission scheme of the first reference signal, the scope of use of the first access information applicable to the first access mode, the configuration information of the first reference signal, and whether at least one of the first access mode is supported are predefined.

[0386] In one embodiment, the second receiving unit is also used to receive first information, which is used to indicate at least one of the first access mode, the transmission scheme of the first access information, the transmission scheme of the first reference signal, the scope of use of the first access information applicable to the first access mode, the configuration information of the first reference signal, and whether the first access mode is supported.

[0387] In one embodiment, the first information is carried by at least one of the following: a broadcast message, an RRC message, a DCI message, a downlink message in random access, a PDCCH, a PDSCH, and an AI / ML-dedicated downlink channel.

[0388] In one embodiment, the second communication device further includes:

[0389] The second sending unit 1402 is used to send second information, which is used to indicate or request configuration of the first access mode, the transmission scheme of the first access information, the transmission scheme of the first reference signal, the scope of use of the first access information applicable to the first access mode, the configuration information of the first reference signal, and whether at least one of the first access mode is supported.

[0390] In one embodiment, the second information is carried by at least one of the following: device capability reporting information, RRC message, UCI message, uplink message in random access, PUCCH, PUSCH, and AI / ML dedicated uplink channel.

[0391] In one embodiment, the first access mode is applicable to a usage scope of the first access information including at least one of the following:

[0392] The first reference signal transmitted by the RAR message is transmitted using the first access mode;

[0393] The first reference signal of the PDCCH of the RAR message is transmitted using the first access mode;

[0394] The first reference signal of the PDSCH of the RAR message is transmitted using the first access mode;

[0395] The first reference signal transmitted by the contention resolution message is transmitted using the first access mode;

[0396] The first reference signal of the PDCCH of the contention resolution message is transmitted using the first access mode;

[0397] The first reference signal of the PDSCH of the contention resolution message is transmitted using the first access mode;

[0398] The first reference signal of the downlink message transmission in the two-step random access is transmitted using the first access mode;

[0399] The first reference signal of the PDCCH of the downlink message in the two-step random access is transmitted using the first access mode;

[0400] The first reference signal of the PDSCH of the downlink message in the two-step random access is transmitted using the first access mode.

[0401] In one embodiment, the configuration information of the first reference signal includes at least one of the following: transmission resources of the first reference signal; transmission power of the first reference signal; sequence information of the first reference signal; and modulation information of the first reference signal.

[0402] In one implementation, the second communication device is a network device, the access mode is a second access mode, the access information is second access information, and the reference signal is a second reference signal.

[0403] In one embodiment, the second access information includes at least one of the following:

[0404] Preamble message in four-step random access;

[0405] Uplink message in four-step random access;

[0406] Preamble message in non-contention two-step random access;

[0407] Uplink message in two-step random access.

[0408] In one embodiment, the second reference signal includes at least one of the following:

[0409] The preamble message needs to transmit a reference signal;

[0410] A reference signal on the PDCCH carrying the uplink message in the four-step random access;

[0411] A reference signal on the PDSCH carrying the uplink message in the four-step random access;

[0412] A reference signal that needs to be transmitted for the uplink message in the two-step random access;

[0413] A reference signal on the PDCCH carrying the uplink message in the two-step random access;

[0414] The reference signal on the PDSCH that carries the uplink message in the two-step random access.

[0415] In one embodiment, in the second access mode, the second access information and the second reference signal are transmitted on the same time-frequency domain transmission resources.

[0416] In one implementation, the transmission resource of the second access information is completely or partially the same as the transmission resource of the second reference signal.

[0417] In one embodiment, the second access mode, the transmission scheme of the second access information, the transmission scheme of the second reference signal, the scope of use of the second access information applicable to the second access mode, the configuration information of the second reference signal, and whether at least one of the second access mode is supported are predefined.

[0418] In one embodiment, the second sending unit 1402 is also used to send third information, which is used to indicate at least one of the second access mode, the transmission scheme of the second access information, the transmission scheme of the second reference signal, the scope of use of the second access information applicable to the second access mode, the configuration information of the second reference signal, and whether the second access mode is supported.

[0419] In one embodiment, the third information is carried by at least one of the following: a broadcast message, an RRC message, a DCI message, a downlink message in random access, a PDCCH, a PDSCH, and an AI / ML-dedicated downlink channel.

[0420] In one embodiment, the second receiving unit 1401 is also used to receive fourth information, which is used to indicate or request configuration of the second access mode, the transmission scheme of the second access information, the transmission scheme of the second reference signal, the scope of use of the second access information applicable to the second access mode, the configuration information of the second reference signal, and whether at least one of the second access mode is supported.

[0421] In one embodiment, the fourth information is carried by at least one of the following: device capability reporting information, RRC message, UCI message, uplink message in random access, PUCCH, PUSCH, and AI / ML dedicated uplink channel.

[0422] In one embodiment, the second access mode is applicable to a usage scope of the second access information including at least one of the following:

[0423] The second reference signal transmitted by the preamble message is transmitted using the second access mode;

[0424] The second reference signal of the PDCCH of the uplink message in the four-step random access is transmitted using the second access mode;

[0425] The second reference signal of the PDSCH of the uplink message in the four-step random access is transmitted using the second access mode;

[0426] The second reference signal for uplink message transmission in the two-step random access is transmitted using the second access mode;

[0427] The second reference signal of the PDCCH of the uplink message in the two-step random access is transmitted using the second access mode;

[0428] The second reference signal of the PDSCH of the uplink message in the two-step random access is transmitted using the second access mode.

[0429] In one embodiment, the configuration information of the second reference signal includes at least one of the following: transmission resources of the second reference signal; transmission power of the second reference signal; sequence information of the second reference signal; and modulation information of the second reference signal.

[0430] The second communication device 1400 of the embodiment of the present application can implement the corresponding functions of the second communication device in the aforementioned method embodiment. The processes, functions, implementation methods and beneficial effects corresponding to the various modules (sub-modules, units or components, etc.) in the second communication device 1400 can be found in the corresponding descriptions in the above-mentioned method embodiments, and will not be repeated here. It should be noted that the functions described in the various modules (sub-modules, units or components, etc.) in the second communication device 1400 of the embodiment of the application can be implemented by different modules (sub-modules, units or components, etc.) or by the same module (sub-module, unit or component, etc.).

[0431] Figure 15 is a schematic structural diagram of a communication device 1500 according to an embodiment of the present application. The communication device 1500 includes a processor 1510, which can call and execute a computer program from a memory to enable the communication device 1500 to implement the method in the embodiment of the present application.

[0432] In one embodiment, the communication device 1500 may further include a memory 1520. The processor 1510 may call and execute a computer program from the memory 1520 to enable the communication device 1500 to implement the method in the embodiment of the present application.

[0433] The memory 1520 may be a separate device independent of the processor 1510 , or may be integrated into the processor 1510 .

[0434] In one embodiment, the communication device 1500 may further include a transceiver 1530 , and the processor 1510 may control the transceiver 1530 to communicate with other devices. Specifically, the transceiver 1530 may send information or data to other devices, or receive information or data sent by other devices.

[0435] The transceiver 1530 may include a transmitter and a receiver. The transceiver 1530 may further include an antenna, and the number of antennas may be one or more.

[0436] In one embodiment, the communication device 1500 may be the first communication device of the embodiment of the present application, and the communication device 1500 may implement the corresponding processes implemented by the first communication device in each method of the embodiment of the present application. For the sake of brevity, they will not be repeated here.

[0437] In one embodiment, the communication device 1500 may be the second communication device of the embodiment of the present application, and the communication device 1500 may implement the corresponding processes implemented by the second communication device in each method of the embodiment of the present application. For the sake of brevity, they will not be repeated here.

[0438] 16 is a schematic structural diagram of a chip 1600 according to an embodiment of the present application. The chip 1600 includes a processor 1610, which can call and execute a computer program from a memory to implement the method according to the embodiment of the present application.

[0439] In one embodiment, the chip 1600 may further include a memory 1620. The processor 1610 may call and execute a computer program from the memory 1620 to implement the method executed by the first communication device or the second communication device in the embodiment of the present application.

[0440] The memory 1620 may be a separate device independent of the processor 1610 , or may be integrated into the processor 1610 .

[0441] In one embodiment, the chip 1600 may further include an input interface 1630. The processor 1610 may control the input interface 1630 to communicate with other devices or chips, and specifically, may obtain information or data sent by other devices or chips.

[0442] In one embodiment, the chip 1600 may further include an output interface 1640. The processor 1610 may control the output interface 1640 to communicate with other devices or chips, and specifically, may output information or data to other devices or chips.

[0443] In one embodiment, the chip can be applied to the first communication device in the embodiment of the present application, and the chip can implement the corresponding processes implemented by the first communication device in each method of the embodiment of the present application. For the sake of brevity, it will not be repeated here.

[0444] In one embodiment, the chip can be applied to the second communication device in the embodiment of the present application, and the chip can implement the corresponding processes implemented by the second communication device in each method of the embodiment of the present application. For the sake of brevity, it will not be repeated here.

[0445] The chips used in the first communication device and the second communication device may be the same chip or different chips.

[0446] It should be understood that the chip mentioned in the embodiments of the present application can also be called a system-level chip, a system chip, a chip system or a system-on-chip chip, etc.

[0447] The processor mentioned above may be a general-purpose processor, a digital signal processor (DSP), a field programmable gate array (FPGA), an application specific integrated circuit (ASIC), or other programmable logic devices, transistor logic devices, discrete hardware components, etc. The general-purpose processor mentioned above may be a microprocessor or any conventional processor, etc.

[0448] The memory mentioned above may be a volatile memory or a non-volatile memory, or may include both volatile and non-volatile memories. The non-volatile memory may be a read-only memory (ROM), a programmable read-only memory (PROM), an erasable programmable read-only memory (EPROM), an electrically erasable programmable read-only memory (EEPROM), or a flash memory. The volatile memory may be a random access memory (RAM).

[0449] It should be understood that the above-mentioned memories are exemplary but not restrictive. For example, the memories in the embodiments of the present application may also be static random access memory (SRAM), dynamic random access memory (DRAM), synchronous dynamic random access memory (SDRAM), double data rate synchronous dynamic random access memory (DDR SDRAM), enhanced synchronous dynamic random access memory (ESDRAM), synchronous link dynamic random access memory (SLDRAM), and direct RAM RAM (DR RAM), etc. In other words, the memories in the embodiments of the present application are intended to include, but are not limited to, these and any other suitable types of memories.

[0450] Figure 17 is a schematic block diagram of a communication system 1700 according to an embodiment of the present application. The communication system 1700 includes a first communication device 1710 and a second communication device 1720. The first communication device 1710 is configured to send access information and a reference signal related to the access information using an access mode. The second communication device 1720 is configured to receive access information and a reference signal related to the access information using an access mode. The first communication device 1710 can be configured to implement the corresponding functions implemented by the first communication device in the above method, and the second communication device 1720 can be configured to implement the corresponding functions implemented by the second communication device in the above method. For the sake of brevity, these details will not be repeated here.

[0451] In the above embodiments, it can be implemented in whole or in part by software, hardware, firmware or any combination thereof. When software is used for implementation, it can be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on a computer, the process or function in accordance with the embodiment of the present application is generated in whole or in part. The computer can be a general-purpose computer, a special-purpose computer, a computer network, or other programmable devices. The computer instructions can be stored in a computer-readable storage medium, or transmitted from one computer-readable storage medium to another computer-readable storage medium. For example, the computer instructions can be transmitted from a website, computer, server or data center by wired (such as coaxial cable, optical fiber, digital subscriber line (DSL)) or wireless (such as infrared, wireless, microwave, etc.) mode to another website, computer, server or data center. The computer-readable storage medium can be any available medium that a computer can access or a data storage device such as a server or data center that includes one or more available media integrations. The available medium may be a magnetic medium (eg, a floppy disk, a hard disk, a magnetic tape), an optical medium (eg, a DVD), or a semiconductor medium (eg, a solid state disk (SSD)).

[0452] It should be understood that in the various embodiments of the present application, the size of the serial numbers of the above-mentioned processes does not mean the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of the present application.

[0453] Those skilled in the art will clearly understand that, for the convenience and brevity of description, the specific working processes of the systems, devices and units described above can refer to the corresponding processes in the aforementioned method embodiments and will not be repeated here.

[0454] The above description is merely a specific embodiment of the present application, but the scope of protection of the present application is not limited thereto. Any modifications or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in the present application should be included within the scope of protection of the present application. Therefore, the scope of protection of the present application should be based on the scope of protection of the claims.

Claims

1. A communication method, comprising: The first communication device sends access information and a reference signal related to the access information in an access mode.

2. The method according to claim 1, wherein The access information is information in random access.

3. The method according to claim 1 or 2, wherein: The first communication device is a network device, the access mode is a first access mode, the access information is first access information, and the reference signal is a first reference signal.

4. The method according to claim 3, wherein: The first access information includes at least one of the following: RAR message in four-step random access; Contention resolution message in four-step random access; RAR message in non-contention two-step random access; Downlink message in two-step random access.

5. The method according to claim 4, wherein The first reference signal includes at least one of the following: The reference signal that the RAR message needs to transmit; A reference signal on the PDCCH carrying the RAR message; A reference signal on the PDSCH carrying the RAR message; The reference signal that the contention resolution message needs to transmit; a reference signal on the PDCCH carrying the contention resolution message; A reference signal on the PDSCH carrying the contention resolution message; Reference signal required to transmit downlink message in two-step random access; A reference signal on the PDCCH carrying a downlink message in the two-step random access; A reference signal on the PDSCH carrying the downlink message in the two-step random access.

6. The method according to any one of claims 3 to 5, wherein In the first access mode, the first access information and the first reference signal are transmitted on the same time-frequency domain transmission resources.

7. The method according to claim 6, wherein: The transmission resource of the first access information is entirely or partially identical to the transmission resource of the first reference signal.

8. The method according to any one of claims 3 to 7, wherein The first access mode, the transmission scheme of the first access information, the transmission scheme of the first reference signal, the scope of use of the first access mode for the first access information, the configuration information of the first reference signal, and whether at least one of the first access mode is supported are predefined.

9. The method according to any one of claims 3 to 8, wherein The method further comprises: The first communication device sends first information, and the first information is used to indicate at least one of the first access mode, the transmission scheme of the first access information, the transmission scheme of the first reference signal, the scope of use of the first access mode applicable to the first access information, the configuration information of the first reference signal, and whether the first access mode is supported.

10. The method according to claim 9, wherein: The first information is carried by at least one of the following: a broadcast message, an RRC message, a DCI message, a downlink message in random access, a PDCCH, a PDSCH, and an AI / ML dedicated downlink channel.

11. The method according to any one of claims 3 to 10, wherein The method further comprises: The first communication device receives second information, and the second information is used to indicate or request configuration of at least one of the first access mode, the transmission scheme of the first access information, the transmission scheme of the first reference signal, the scope of use of the first access mode applicable to the first access information, the configuration information of the first reference signal, and whether the first access mode is supported.

12. The method according to claim 11, wherein The second information is carried by at least one of the following: device capability reporting information, RRC message, UCI message, uplink message in random access, PUCCH, PUSCH, and AI / ML dedicated uplink channel.

13. The method according to any one of claims 8 to 12, wherein The first access mode is applicable to a usage scope of the first access information including at least one of the following: The first reference signal transmitted by the RAR message is transmitted using a first access mode; The first reference signal of the PDCCH of the RAR message is transmitted using the first access mode; The first reference signal of the PDSCH of the RAR message is transmitted using a first access mode; The first reference signal transmitted by the contention resolution message is transmitted using a first access mode; The first reference signal of the PDCCH of the contention resolution message is transmitted using the first access mode; The first reference signal of the PDSCH of the contention resolution message is transmitted using the first access mode; The first reference signal for downlink message transmission in the two-step random access is transmitted using the first access mode; The first reference signal of the PDCCH of the downlink message in the two-step random access is transmitted using the first access mode; The first reference signal of the PDSCH of the downlink message in the two-step random access is transmitted using the first access mode.

14. The method according to any one of claims 8 to 13, wherein The configuration information of the first reference signal includes at least one of the following: transmission resources of the first reference signal; transmission power of the first reference signal; sequence information of the first reference signal; and modulation information of the first reference signal.

15. The method according to any one of claims 1 to 14, wherein The first communication device is a terminal device, the access mode is a second access mode, the access information is second access information, and the reference signal is a second reference signal.

16. The method according to claim 15, wherein The second access information includes at least one of the following: Preamble message in four-step random access; Uplink message in four-step random access; Preamble message in non-contention two-step random access; Uplink message in two-step random access.

17. The method according to claim 16, wherein The second reference signal includes at least one of the following: The reference signal that the preamble message needs to transmit; A reference signal on the PDCCH carrying the uplink message in the four-step random access; A reference signal on the PDSCH carrying the uplink message in the four-step random access; A reference signal that needs to be transmitted for the uplink message in the two-step random access; A reference signal on the PDCCH carrying an uplink message in the two-step random access; A reference signal on the PDSCH carrying the uplink message in the two-step random access.

18. The method according to claim 16 or 17, wherein In the second access mode, the second access information and the second reference signal are transmitted on the same time-frequency domain transmission resources.

19. The method according to claim 18, wherein The transmission resource of the second access information is entirely or partially identical to the transmission resource of the second reference signal.

20. The method according to any one of claims 15 to 19, wherein The second access mode, the transmission scheme of the second access information, the transmission scheme of the second reference signal, the scope of use of the second access mode applicable to the second access information, the configuration information of the second reference signal, and whether at least one of the second access mode is supported are predefined.

21. The method according to any one of claims 15 to 20, wherein The method further comprises: The first communication device receives third information, and the third information is used to indicate at least one of the second access mode, the transmission scheme of the second access information, the transmission scheme of the second reference signal, the scope of use of the second access mode applicable to the second access information, the configuration information of the second reference signal, and whether the second access mode is supported.

22. The method according to claim 21, wherein The third information is carried by at least one of the following: a broadcast message, an RRC message, a DCI message, a downlink message in random access, a PDCCH, a PDSCH, and an AI / ML dedicated downlink channel.

23. The method according to any one of claims 15 to 22, wherein The method further comprises: The first communication device sends fourth information, and the fourth information is used to indicate or request configuration of at least one of the second access mode, the transmission scheme of the second access information, the transmission scheme of the second reference signal, the scope of use of the second access mode applicable to the second access information, the configuration information of the second reference signal, and whether the second access mode is supported.

24. The method according to claim 23, wherein The fourth information is carried by at least one of the following: device capability reporting information, RRC message, UCI message, uplink message in random access, PUCCH, PUSCH, and AI / ML dedicated uplink channel.

25. The method according to any one of claims 20 to 24, wherein The second access mode is applicable to a usage scope of the second access information including at least one of the following: The second reference signal transmitted by the preamble message is transmitted using a second access mode; The second reference signal of the PDCCH of the uplink message in the four-step random access is transmitted using the second access mode; The second reference signal of the PDSCH of the uplink message in the four-step random access is transmitted using the second access mode; The second reference signal for uplink message transmission in the two-step random access is transmitted using the second access mode; The second reference signal of the PDCCH of the uplink message in the two-step random access is transmitted using the second access mode; The second reference signal of the PDSCH of the uplink message in the two-step random access is transmitted using the second access mode.

26. The method according to any one of claims 20 to 25, wherein The configuration information of the second reference signal includes at least one of the following: transmission resources of the second reference signal; transmission power of the second reference signal; sequence information of the second reference signal; and modulation information of the second reference signal.

27. A communication method, comprising: The second communication device receives access information and a reference signal related to the access information in an access mode.

28. The method according to claim 27, wherein The access information is information in random access.

29. The method according to claim 27 or 28, wherein The second communication device is a terminal device, the access mode is a first access mode, the access information is first access information, and the reference signal is a first reference signal.

30. The method according to claim 29, wherein The first access information includes at least one of the following: RAR message in four-step random access; Contention resolution message in four-step random access; RAR message in non-contention two-step random access; Downlink message in two-step random access.

31. The method according to claim 30, wherein The first reference signal includes at least one of the following: The reference signal that the RAR message needs to transmit; A reference signal on the PDCCH carrying the RAR message; A reference signal on the PDSCH carrying the RAR message; The reference signal that the contention resolution message needs to transmit; a reference signal on the PDCCH carrying the contention resolution message; A reference signal on the PDSCH carrying the contention resolution message; Reference signal required to transmit downlink message in two-step random access; A reference signal on the PDCCH carrying a downlink message in the two-step random access; A reference signal on the PDSCH carrying the downlink message in the two-step random access.

32. The method according to any one of claims 29 to 31, wherein In the first access mode, the first access information and the first reference signal are transmitted on the same time-frequency domain transmission resources.

33. The method according to claim 32, wherein The transmission resource of the first access information is entirely or partially identical to the transmission resource of the first reference signal.

34. The method according to any one of claims 29 to 33, wherein The first access mode, the transmission scheme of the first access information, the transmission scheme of the first reference signal, the scope of use of the first access mode for the first access information, the configuration information of the first reference signal, and whether at least one of the first access mode is supported are predefined.

35. The method according to any one of claims 29 to 34, wherein The method further comprises: The second communication device receives first information, where the first information is used to indicate at least one of the first access mode, the transmission scheme of the first access information, the transmission scheme of the first reference signal, the scope of use of the first access mode applicable to the first access information, the configuration information of the first reference signal, and whether the first access mode is supported.

36. The method according to claim 35, wherein The first information is carried by at least one of the following: a broadcast message, an RRC message, a DCI message, a downlink message in random access, a PDCCH, a PDSCH, and an AI / ML dedicated downlink channel.

37. The method according to any one of claims 29 to 36, wherein The method further comprises: The second communication device sends second information, and the second information is used to indicate or request configuration of at least one of the first access mode, the transmission scheme of the first access information, the transmission scheme of the first reference signal, the scope of use of the first access mode applicable to the first access information, the configuration information of the first reference signal, and whether the first access mode is supported.

38. The method according to claim 37, wherein The second information is carried by at least one of the following: device capability reporting information, RRC message, UCI message, uplink message in random access, PUCCH, PUSCH, and AI / ML dedicated uplink channel.

39. The method according to any one of claims 34 to 38, wherein The first access mode is applicable to a usage scope of the first access information including at least one of the following: The first reference signal transmitted by the RAR message is transmitted using a first access mode; The first reference signal of the PDCCH of the RAR message is transmitted using the first access mode; The first reference signal of the PDSCH of the RAR message is transmitted using a first access mode; The first reference signal transmitted by the contention resolution message is transmitted using a first access mode; The first reference signal of the PDCCH of the contention resolution message is transmitted using the first access mode; The first reference signal of the PDSCH of the contention resolution message is transmitted using the first access mode; The first reference signal for downlink message transmission in the two-step random access is transmitted using the first access mode; The first reference signal of the PDCCH of the downlink message in the two-step random access is transmitted using the first access mode; The first reference signal of the PDSCH of the downlink message in the two-step random access is transmitted using the first access mode.

40. The method according to any one of claims 34 to 39, wherein The configuration information of the first reference signal includes at least one of the following: transmission resources of the first reference signal; transmission power of the first reference signal; sequence information of the first reference signal; and modulation information of the first reference signal.

41. The method according to any one of claims 27 to 40, wherein The second communication device is a network device, the access mode is a second access mode, the access information is second access information, and the reference signal is a second reference signal.

42. The method according to claim 41, wherein The second access information includes at least one of the following: Preamble message in four-step random access; Uplink message in four-step random access; Preamble message in non-contention two-step random access; Uplink message in two-step random access.

43. The method according to claim 42, wherein The second reference signal includes at least one of the following: The reference signal that the preamble message needs to transmit; A reference signal on the PDCCH carrying the uplink message in the four-step random access; A reference signal on the PDSCH carrying the uplink message in the four-step random access; A reference signal that needs to be transmitted for the uplink message in the two-step random access; A reference signal on the PDCCH carrying an uplink message in the two-step random access; A reference signal on the PDSCH carrying the uplink message in the two-step random access.

44. The method according to claim 42 or 43, wherein In the second access mode, the second access information and the second reference signal are transmitted on the same time-frequency domain transmission resources.

45. The method of claim 44, wherein: The transmission resource of the second access information is entirely or partially identical to the transmission resource of the second reference signal.

46. The method according to any one of claims 41 to 45, wherein The second access mode, the transmission scheme of the second access information, the transmission scheme of the second reference signal, the scope of use of the second access mode applicable to the second access information, the configuration information of the second reference signal, and whether at least one of the second access mode is supported are predefined.

47. A method according to any one of claims 41 to 46, wherein The method further comprises: The second communication device sends third information, and the third information is used to indicate at least one of the second access mode, the transmission scheme of the second access information, the transmission scheme of the second reference signal, the scope of use of the second access mode applicable to the second access information, the configuration information of the second reference signal, and whether the second access mode is supported.

48. The method of claim 47, wherein The third information is carried by at least one of the following: a broadcast message, an RRC message, a DCI message, a downlink message in random access, a PDCCH, a PDSCH, and an AI / ML dedicated downlink channel.

49. The method according to any one of claims 41 to 48, wherein The method further comprises: The second communication device receives fourth information, and the fourth information is used to indicate or request configuration of at least one of the second access mode, the transmission scheme of the second access information, the transmission scheme of the second reference signal, the scope of use of the second access mode applicable to the second access information, the configuration information of the second reference signal, and whether the second access mode is supported.

50. The method of claim 49, wherein The fourth information is carried by at least one of the following: device capability reporting information, RRC message, UCI message, uplink message in random access, PUCCH, PUSCH, and AI / ML dedicated uplink channel.

51. The method according to any one of claims 46 to 50, wherein The second access mode is applicable to a usage scope of the second access information including at least one of the following: The second reference signal transmitted by the preamble message is transmitted using a second access mode; The second reference signal of the PDCCH of the uplink message in the four-step random access is transmitted using the second access mode; The second reference signal of the PDSCH of the uplink message in the four-step random access is transmitted using the second access mode; The second reference signal for uplink message transmission in the two-step random access is transmitted using the second access mode; The second reference signal of the PDCCH of the uplink message in the two-step random access is transmitted using the second access mode; The second reference signal of the PDSCH of the uplink message in the two-step random access is transmitted using the second access mode.

52. The method according to any one of claims 46 to 51, wherein The configuration information of the second reference signal includes at least one of the following: transmission resources of the second reference signal; transmission power of the second reference signal; sequence information of the second reference signal; and modulation information of the second reference signal.

53. A first communication device, comprising: The first sending unit is configured to send access information and a reference signal related to the access information by adopting an access mode.

54. The first communication device according to claim 53, wherein The access information is information in random access.

55. The first communication device according to claim 53 or 54, wherein: The first communication device is a network device, the access mode is a first access mode, the access information is first access information, and the reference signal is a first reference signal.

56. The first communication device according to claim 55, wherein The first access information includes at least one of the following: RAR message in four-step random access; Contention resolution message in four-step random access; RAR message in non-contention two-step random access; Downlink message in two-step random access.

57. The first communication device according to claim 56, wherein The first reference signal includes at least one of the following: The reference signal that the RAR message needs to transmit; A reference signal on the PDCCH carrying the RAR message; A reference signal on the PDSCH carrying the RAR message; The reference signal that the contention resolution message needs to transmit; a reference signal on the PDCCH carrying the contention resolution message; A reference signal on the PDSCH carrying the contention resolution message; Reference signal required to transmit downlink message in two-step random access; A reference signal on the PDCCH carrying a downlink message in the two-step random access; A reference signal on the PDSCH carrying the downlink message in the two-step random access.

58. The first communication device according to any one of claims 55 to 57, wherein: In the first access mode, the first access information and the first reference signal are transmitted on the same time-frequency domain transmission resources.

59. The first communication device according to claim 58, wherein The transmission resource of the first access information is entirely or partially identical to the transmission resource of the first reference signal.

60. The first communication device according to any one of claims 55 to 59, wherein: The first access mode, the transmission scheme of the first access information, the transmission scheme of the first reference signal, the scope of use of the first access mode for the first access information, the configuration information of the first reference signal, and whether at least one of the first access mode is supported are predefined.

61. The first communication device according to any one of claims 55 to 60, wherein: The first sending unit is also used to send first information, and the first information is used to indicate at least one of the first access mode, the transmission scheme of the first access information, the transmission scheme of the first reference signal, the scope of use of the first access mode applicable to the first access information, the configuration information of the first reference signal, and whether the first access mode is supported.

62. The first communication device according to claim 61, wherein The first information is carried by at least one of the following: a broadcast message, an RRC message, a DCI message, a downlink message in random access, a PDCCH, a PDSCH, and an AI / ML dedicated downlink channel.

63. The first communication device according to any one of claims 55 to 62, wherein: The first communication device further includes: A first receiving unit is used to receive second information, where the second information is used to indicate or request configuration of at least one of the first access mode, the transmission scheme of the first access information, the transmission scheme of the first reference signal, the scope of use of the first access mode applicable to the first access information, configuration information of the first reference signal, and whether the first access mode is supported.

64. The first communication device according to claim 63, wherein: The second information is carried by at least one of the following: device capability reporting information, RRC message, UCI message, uplink message in random access, PUCCH, PUSCH, and AI / ML dedicated uplink channel.

65. The method according to any one of claims 8 to 12, wherein The first access mode is applicable to a usage scope of the first access information including at least one of the following: The first reference signal transmitted by the RAR message is transmitted using a first access mode; The first reference signal of the PDCCH of the RAR message is transmitted using the first access mode; The first reference signal of the PDSCH of the RAR message is transmitted using a first access mode; The first reference signal transmitted by the contention resolution message is transmitted using a first access mode; The first reference signal of the PDCCH of the contention resolution message is transmitted using the first access mode; The first reference signal of the PDSCH of the contention resolution message is transmitted using the first access mode; The first reference signal for downlink message transmission in the two-step random access is transmitted using the first access mode; The first reference signal of the PDCCH of the downlink message in the two-step random access is transmitted using the first access mode; The first reference signal of the PDSCH of the downlink message in the two-step random access is transmitted using the first access mode.

66. The first communication device according to any one of claims 60 to 65, wherein: The configuration information of the first reference signal includes at least one of the following: transmission resources of the first reference signal; transmission power of the first reference signal; sequence information of the first reference signal; and modulation information of the first reference signal.

67. The first communication device according to any one of claims 53 to 66, wherein: The first communication device is a terminal device, the access mode is a second access mode, the access information is second access information, and the reference signal is a second reference signal.

68. The first communication device according to claim 67, wherein The second access information includes at least one of the following: Preamble message in four-step random access; Uplink message in four-step random access; Preamble message in non-contention two-step random access; Uplink message in two-step random access.

69. The first communication device according to claim 68, wherein The second reference signal includes at least one of the following: The reference signal that the preamble message needs to transmit; A reference signal on the PDCCH carrying the uplink message in the four-step random access; A reference signal on the PDSCH carrying the uplink message in the four-step random access; A reference signal that needs to be transmitted for the uplink message in the two-step random access; A reference signal on the PDCCH carrying an uplink message in the two-step random access; A reference signal on the PDSCH carrying the uplink message in the two-step random access.

70. The first communication device according to claim 68 or 69, wherein: In the second access mode, the second access information and the second reference signal are transmitted on the same time-frequency domain transmission resources.

71. The first communication device according to claim 70, wherein: The transmission resource of the second access information is entirely or partially identical to the transmission resource of the second reference signal.

72. The first communication device according to any one of claims 67 to 71, wherein: The second access mode, the transmission scheme of the second access information, the transmission scheme of the second reference signal, the scope of use of the second access mode applicable to the second access information, the configuration information of the second reference signal, and whether at least one of the second access mode is supported are predefined.

73. The first communication device according to any one of claims 67 to 72, wherein: The first receiving unit is also used to receive third information, and the third information is used to indicate at least one of the second access mode, the transmission scheme of the second access information, the transmission scheme of the second reference signal, the scope of use of the second access information applicable to the second access mode, the configuration information of the second reference signal, and whether the second access mode is supported.

74. The first communication device according to claim 73, wherein The third information is carried by at least one of the following: a broadcast message, an RRC message, a DCI message, a downlink message in random access, a PDCCH, a PDSCH, and an AI / ML dedicated downlink channel.

75. The first communication device according to any one of claims 67 to 74, wherein: The first sending unit is also used to send fourth information, and the fourth information is used to indicate or request configuration of at least one of the second access mode, the transmission scheme of the second access information, the transmission scheme of the second reference signal, the scope of use of the second access information applicable to the second access mode, the configuration information of the second reference signal, and whether the second access mode is supported.

76. The first communication device according to claim 75, wherein The fourth information is carried by at least one of the following: device capability reporting information, RRC message, UCI message, uplink message in random access, PUCCH, PUSCH, and AI / ML dedicated uplink channel.

77. The first communication device according to any one of claims 72 to 76, wherein: The second access mode is applicable to a usage scope of the second access information including at least one of the following: The second reference signal transmitted by the preamble message is transmitted using a second access mode; The second reference signal of the PDCCH of the uplink message in the four-step random access is transmitted using the second access mode; The second reference signal of the PDSCH of the uplink message in the four-step random access is transmitted using the second access mode; The second reference signal for uplink message transmission in the two-step random access is transmitted using the second access mode; The second reference signal of the PDCCH of the uplink message in the two-step random access is transmitted using the second access mode; The second reference signal of the PDSCH of the uplink message in the two-step random access is transmitted using the second access mode.

78. The first communication device according to any one of claims 52 to 77, wherein: The configuration information of the second reference signal includes at least one of the following: transmission resources of the second reference signal; transmission power of the second reference signal; sequence information of the second reference signal; and modulation information of the second reference signal.

79. A second communication device, comprising: The second receiving unit is configured to receive access information and a reference signal related to the access information by adopting an access mode.

80. The second communication device according to claim 79, wherein The access information is information in random access.

81. The second communication device according to claim 79 or 80, wherein: The second communication device is a terminal device, the access mode is a first access mode, the access information is first access information, and the reference signal is a first reference signal.

82. The second communication device according to claim 81, wherein The first access information includes at least one of the following: RAR message in four-step random access; Contention resolution message in four-step random access; RAR message in non-contention two-step random access; Downlink message in two-step random access.

83. The second communication device according to claim 82, wherein The first reference signal includes at least one of the following: The reference signal that the RAR message needs to transmit; A reference signal on the PDCCH carrying the RAR message; A reference signal on the PDSCH carrying the RAR message; The reference signal that the contention resolution message needs to transmit; a reference signal on the PDCCH carrying the contention resolution message; A reference signal on the PDSCH carrying the contention resolution message; Reference signal required to transmit downlink message in two-step random access; A reference signal on the PDCCH carrying a downlink message in the two-step random access; A reference signal on the PDSCH carrying the downlink message in the two-step random access.

84. The second communication device according to any one of claims 81 to 83, wherein: In the first access mode, the first access information and the first reference signal are transmitted on the same time-frequency domain transmission resources.

85. The second communication device according to claim 84, wherein The transmission resource of the first access information is entirely or partially identical to the transmission resource of the first reference signal.

86. The second communication device according to any one of claims 81 to 85, wherein: The first access mode, the transmission scheme of the first access information, the transmission scheme of the first reference signal, the scope of use of the first access mode for the first access information, the configuration information of the first reference signal, and whether at least one of the first access mode is supported are predefined.

87. The second communication device according to any one of claims 81 to 86, wherein: The second receiving unit is also used to receive first information, and the first information is used to indicate at least one of the first access mode, the transmission scheme of the first access information, the transmission scheme of the first reference signal, the scope of use of the first access information applicable to the first access mode, the configuration information of the first reference signal, and whether the first access mode is supported.

88. The second communication device according to claim 87, wherein The first information is carried by at least one of the following: a broadcast message, an RRC message, a DCI message, a downlink message in random access, a PDCCH, a PDSCH, and an AI / ML dedicated downlink channel.

89. The second communication device according to any one of claims 81 to 88, wherein: The second communication device further includes: The second sending unit is used to send second information, where the second information is used to indicate or request configuration of at least one of the first access mode, the transmission scheme of the first access information, the transmission scheme of the first reference signal, the scope of use of the first access mode applicable to the first access information, the configuration information of the first reference signal, and whether the first access mode is supported.

90. The second communication device according to claim 89, wherein The second information is carried by at least one of the following: device capability reporting information, RRC message, UCI message, uplink message in random access, PUCCH, PUSCH, and AI / ML dedicated uplink channel.

91. The second communication device according to any one of claims 86 to 90, wherein: The first access mode is applicable to a usage scope of the first access information including at least one of the following: The first reference signal transmitted by the RAR message is transmitted using a first access mode; The first reference signal of the PDCCH of the RAR message is transmitted using the first access mode; The first reference signal of the PDSCH of the RAR message is transmitted using a first access mode; The first reference signal transmitted by the contention resolution message is transmitted using a first access mode; The first reference signal of the PDCCH of the contention resolution message is transmitted using the first access mode; The first reference signal of the PDSCH of the contention resolution message is transmitted using the first access mode; The first reference signal for downlink message transmission in the two-step random access is transmitted using the first access mode; The first reference signal of the PDCCH of the downlink message in the two-step random access is transmitted using the first access mode; The first reference signal of the PDSCH of the downlink message in the two-step random access is transmitted using the first access mode.

92. The second communication device according to any one of claims 86 to 91, wherein: The configuration information of the first reference signal includes at least one of the following: transmission resources of the first reference signal; transmission power of the first reference signal; sequence information of the first reference signal; and modulation information of the first reference signal.

93. The second communication device according to any one of claims 79 to 92, wherein: The second communication device is a network device, the access mode is a second access mode, the access information is second access information, and the reference signal is a second reference signal.

94. The second communication device according to claim 93, wherein The second access information includes at least one of the following: Preamble message in four-step random access; Uplink message in four-step random access; Preamble message in non-contention two-step random access; Uplink message in two-step random access.

95. The second communication device according to claim 94, wherein The second reference signal includes at least one of the following: The reference signal that the preamble message needs to transmit; A reference signal on the PDCCH carrying the uplink message in the four-step random access; A reference signal on the PDSCH carrying the uplink message in the four-step random access; A reference signal that needs to be transmitted for the uplink message in the two-step random access; A reference signal on the PDCCH carrying an uplink message in the two-step random access; A reference signal on the PDSCH carrying the uplink message in the two-step random access.

96. The second communication device according to claim 94 or 95, wherein: In the second access mode, the second access information and the second reference signal are transmitted on the same time-frequency domain transmission resources.

97. The second communication device according to claim 96, wherein The transmission resource of the second access information is entirely or partially identical to the transmission resource of the second reference signal.

98. The second communication device according to any one of claims 93 to 97, wherein: The second access mode, the transmission scheme of the second access information, the transmission scheme of the second reference signal, the scope of use of the second access mode applicable to the second access information, the configuration information of the second reference signal, and whether at least one of the second access mode is supported are predefined.

99. The second communication device according to any one of claims 93 to 98, wherein: The second sending unit is also used to send third information, and the third information is used to indicate at least one of the second access mode, the transmission scheme of the second access information, the transmission scheme of the second reference signal, the scope of use of the second access mode applicable to the second access information, the configuration information of the second reference signal, and whether the second access mode is supported.

100. The second communication device according to claim 99, wherein The third information is carried by at least one of the following: a broadcast message, an RRC message, a DCI message, a downlink message in random access, a PDCCH, a PDSCH, and an AI / ML dedicated downlink channel.

101. The second communication device according to any one of claims 93 to 100, wherein: The second receiving unit is also used to receive fourth information, and the fourth information is used to indicate or request configuration of at least one of the second access mode, the transmission scheme of the second access information, the transmission scheme of the second reference signal, the scope of use of the second access information applicable to the second access mode, the configuration information of the second reference signal, and whether the second access mode is supported.

102. The second communication device according to claim 101, wherein The fourth information is carried by at least one of the following: device capability reporting information, RRC message, UCI message, uplink message in random access, PUCCH, PUSCH, and AI / ML dedicated uplink channel.

103. The second communication device according to any one of claims 98 to 102, wherein: The second access mode is applicable to a usage scope of the second access information including at least one of the following: The second reference signal transmitted by the preamble message is transmitted using a second access mode; The second reference signal of the PDCCH of the uplink message in the four-step random access is transmitted using the second access mode; The second reference signal of the PDSCH of the uplink message in the four-step random access is transmitted using the second access mode; The second reference signal for uplink message transmission in the two-step random access is transmitted using the second access mode; The second reference signal of the PDCCH of the uplink message in the two-step random access is transmitted using the second access mode; The second reference signal of the PDSCH of the uplink message in the two-step random access is transmitted using the second access mode.

104. The second communication device according to any one of claims 98 to 103, wherein: The configuration information of the second reference signal includes at least one of the following: transmission resources of the second reference signal; transmission power of the second reference signal; sequence information of the second reference signal; and modulation information of the second reference signal.

105. A communication device comprising: A transceiver, a processor and a memory, the memory being used to store a computer program, the transceiver being used to communicate with other devices, and the processor being used to call and run the computer program stored in the memory so that the communication device executes the method according to any one of claims 1 to 26 or any one of claims 27 to 52.

106. A chip comprising: A processor, configured to call and run a computer program from a memory, so that a device equipped with the chip executes a method as claimed in any one of claims 1 to 26 or any one of claims 27 to 52.

107. A computer-readable storage medium for storing a computer program, which, when executed by a device, causes the device to perform the method according to any one of claims 1 to 26 or any one of claims 27 to 52.

108. A computer program product comprising computer program instructions for causing a computer to perform the method of any one of claims 1 to 26 or any one of 27 to 52.

109. A computer program causing a computer to perform the method of any one of claims 1 to 26 or any one of 27 to 52.

110. A communication system comprising: A first communication device, configured to perform the method according to any one of claims 1 to 26; A second communication device, configured to execute the method according to any one of claims 27 to 52.

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