WO2024083170A1

WO2024083170A1 - Message transmission method and communication apparatus

Info

Publication number: WO2024083170A1
Application number: PCT/CN2023/125300
Authority: WO
Inventors: 张萌
Original assignee: 展讯通信（上海）有限公司
Priority date: 2022-10-21
Filing date: 2023-10-19
Publication date: 2024-04-25
Also published as: CN117979457A

Abstract

Disclosed in the present application are a message transmission method and a communication apparatus. The message transmission method comprises: receiving a message 4, wherein a demodulation reference signal (DMRS) of a physical downlink shared channel (PDSCH) carrying the message 4 has a quasi co-location (QCL) relationship with a first synchronization signal block (SSB) of at least two SSBs, which are SSBs corresponding to multiple repeated transmissions of a message 1, or, the DMRS of the PDSCH carrying the message 4 has the same QCL relationship with a reference signal of a PDSCH carrying a message 2, or, the DMRS of the PDSCH carrying the message 4 has the same QCL relationship with a reference signal of a physical uplink shared channel (PUSCH) carrying a message 3. By using the present application, a signal with a QCL relationship with the DMRS of the PDSCH carrying the message 4 can be determined in a scenario involving repeatedly transmitting the message 1 multiple times.

Description

Message transmission method and communication device

Technical Field

The present application relates to the field of communication technology, and in particular to a message transmission method and a communication device.

Background technique

The terminal device accesses the network device through a random access process. In the random access process, the terminal device sends message 1 (Msg1) to the network device, the network device responds to the message 1 and sends message 2 (Msg2) to the terminal device. The terminal device further sends message 3 (Msg3) to the network device, the network device responds to the message 3 and sends message 4 to the terminal device. At present, the demodulation reference signal (DMRS) of the physical downlink shared channel (PDSCH) carrying message 4 in the random access process and the synchronization signal block (SSB) associated with message 1 have a quasi co-location (QCL) relationship. In order to enhance coverage, message 1 may be transmitted repeatedly in the future, and the repeated transmissions may be transmitted using different beams. How to determine the QCL relationship of the DMRS of the PDSCH carrying message 4 in the scenario of repeated transmission of message 1 is an urgent problem to be solved.

Summary of the invention

An embodiment of the present application provides a message transmission method and a communication device, which can determine a signal having a QCL relationship with the DMRS of the PDSCH carrying message 4 in a scenario where message 1 is repeatedly transmitted multiple times, thereby facilitating the terminal device to receive message 4.

In a first aspect, an embodiment of the present application provides a message transmission method, the method comprising:

Receive message 4, the demodulation reference signal DMRS of the physical downlink shared channel PDSCH carrying the message 4 has a quasi-co-site QCL relationship with the first SSB of at least two synchronization signal blocks SSB, and the at least two SSBs are the SSBs corresponding to the repeated transmissions of message 1, or, the DMRS of the PDSCH carrying the message 4 has the same QCL relationship with the reference signal of the PDSCH carrying message 2, or, the DMRS of the PDSCH carrying the message 4 has the same QCL relationship with the reference signal of the physical uplink shared channel PUSCH carrying message 3.

Based on the description of the first aspect, the DMRS of the PDSCH carrying message 4 may have a QCL relationship with the first SSB of at least two SSBs corresponding to the repeated transmission of message 1, or may have the same QCL relationship with the reference signal of the PDSCH carrying message 2, or may have the same QCL relationship with the reference signal of the PUSCH carrying message 3. The present application can determine a signal having a QCL relationship with the DMRS of the PDSCH carrying message 4 in a scenario where message 1 is transmitted repeatedly, thereby facilitating the terminal device to receive message 4.

In one possible implementation, the first SSB is the SSB corresponding to the first transmission among the repeated multiple transmissions; or; the first SSB is the SSB corresponding to the second transmission among the repeated multiple transmissions; wherein the first transmission is the transmission with the earliest transmission time among the repeated multiple transmissions, and the second transmission is the transmission with the latest transmission time among the repeated multiple transmissions.

When this method is implemented, in the scenario of repeated transmission of message 1, the SSB corresponding to the earliest transmitted message 1 can be either the SSB corresponding to the latest transmitted message 1. This embodiment can clearly identify the signal that has a QCL relationship with the DMRS of the PDSCH carrying message 4.

In a possible implementation manner, the first SSB is an SSB corresponding to an RO resource with a highest resource index number among at least two random access opportunity RO resources associated with the at least two SSBs; or,

The first SSB is the SSB corresponding to the RO resource with the lowest resource index number among the at least two RO resources associated with the at least two SSBs; or,

The first SSB is the SSB corresponding to the RO resource with the highest frequency domain position among the at least two RO resources associated with the at least two SSBs; or

The first SSB is the SSB corresponding to the RO resource with the lowest frequency domain position among the at least two RO resources associated with the at least two SSBs;

Among them, one SSB is associated with one or more RO resources.

In this way, the SSB signal having a QCL relationship of the DMRS of the PDSCH carrying message 4 is accurately determined by comparing the resource index numbers of at least two RO resources associated with at least two SSBs.

In a possible implementation manner, the first SSB is the SSB with the lowest SSB index number among the at least two SSBs; or,

The first SSB is the SSB with the highest SSB index number among the at least two SSBs.

In this way, the SSB signal having a QCL relationship with the DMRS of the PDSCH carrying message 4 is accurately determined by comparing the SSB index numbers of at least two SSBs.

In a possible implementation, the QCL relationship includes correlation with large-scale channel characteristic parameters, and the large-scale channel characteristic parameters include at least one of the following: Doppler spread, Doppler shift, average delay, delay extension, spatial reception filter parameters, and spatial transmission filter parameters.

In this way, the channel large-scale characteristic parameters of the message 4 are determined by the correlation between the channel large-scale characteristic parameters of the two signals having a QCL relationship, thereby improving the receiving efficiency.

In a second aspect, an embodiment of the present application provides a message transmission method, the method comprising:

Send message 4, the demodulation reference signal DMRS of the physical downlink shared channel PDSCH carrying the message 4 is The first SSB of at least two synchronization signal blocks SSB have a quasi-co-location QCL relationship, and the at least two SSBs are the SSBs corresponding to the repeated transmissions of message 1, or the DMRS of the PDSCH carrying the message 4 has the same QCL relationship with the reference signal of the PDSCH carrying message 2, or the DMRS of the PDSCH carrying the message 4 has the same QCL relationship with the reference signal of the physical uplink shared channel PUSCH carrying message 3.

Among them, one SSB is associated with one or more RO resources.

In a third aspect, an embodiment of the present application provides a communication device, which includes a unit for implementing a method in any possible implementation manner of the first aspect above, or includes a unit for implementing a method in any possible implementation manner of the second aspect above.

In a fourth aspect, an embodiment of the present application provides a communication device, which includes a processor and a memory, the processor and the memory are interconnected, the memory is used to store a computer program, the computer program includes program instructions, and the processor is configured to call the program instructions to execute the method as described in the first aspect or any optional embodiment of the first aspect, or to execute the method as described in the second aspect or any optional embodiment of the second aspect.

In a fifth aspect, an embodiment of the present application provides a chip, comprising a processor and an interface, wherein the processor and the interface are coupled; the interface is used to receive or output signals, and the processor is used to execute code instructions to execute the method described in the first aspect or any optional embodiment of the first aspect, or to execute the method described in the second aspect or any optional embodiment of the second aspect.

In the sixth aspect, an embodiment of the present application provides a module device, which includes a communication module, a power module, a storage module and a chip module, wherein: the power module is used to provide power to the module device; the storage module is used to store data and/or instructions; the communication module communicates with an external device; the chip module is used to call the data and/or instructions stored in the storage module, and in combination with the communication module, execute the method as described in the first aspect or any optional implementation method of the first aspect, or execute the method as described in the second aspect or any optional implementation method of the second aspect.

In the seventh aspect, an embodiment of the present application provides a computer-readable storage medium, which stores a computer program, and the computer program includes program instructions. When an electronic device executes the program instructions, it implements the method described in the first aspect or any optional embodiment of the first aspect, or implements the method described in the second aspect or any optional embodiment of the second aspect.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1a is a schematic diagram of the structure of a communication system provided in an embodiment of the present application;

FIG1b is a schematic diagram of a random access process provided in an embodiment of the present application;

FIG1c is a schematic diagram of the association relationship between SSB and RO resources provided in an embodiment of the present application;

FIG2 is a schematic diagram of a flow chart of a message transmission method provided in an embodiment of the present application;

FIG3 is a schematic diagram of the structure of a communication device provided in an embodiment of the present application;

FIG4 is a schematic diagram of the structure of another communication device provided in an embodiment of the present application;

FIG5 is a schematic diagram of the structure of another communication device provided in an embodiment of the present application;

FIG. 6 is a schematic diagram of the structure of a module device provided in an embodiment of the present application.

Detailed ways

In the embodiments of the present application, unless otherwise specified, the character "/" indicates that the objects before and after the association are in an or relationship. For example, A/B can represent A or B. "And/or" describes the association relationship of the associated objects, indicating that three relationships can exist. For example, A and/or B can represent: A exists alone, A and B exist at the same time, and B exists alone.

It should be pointed out that the words "first", "second" and the like in the embodiments of the present application are only used for distinguishing description purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features, nor can they be understood as Indicates or implies a sequence.

In the embodiments of the present application, "at least one" refers to one or more, and "plurality" refers to two or more. In addition, "at least one of the following" or similar expressions refers to any combination of these items, which may include any combination of single items or plural items. For example, at least one of A, B, or C may represent: A, B, C, A and B, A and C, B and C, or A, B and C. Among them, each of A, B, and C may be an element itself, or a set containing one or more elements.

In the embodiments of the present application, "exemplary", "in some embodiments", "in another embodiment", etc. are used to indicate examples, illustrations or descriptions. Any embodiment or design described as "exemplary" in the present application should not be interpreted as being more preferred or more advantageous than other embodiments or designs. Specifically, the use of the word "exemplary" is intended to present concepts in a concrete way.

In the embodiments of the present application, "of", "corresponding", and "corresponding" can sometimes be used interchangeably. It should be noted that when the distinction between them is not emphasized, the meanings to be expressed are consistent. In the embodiments of the present application, communication and transmission can sometimes be used interchangeably. It should be noted that when the distinction between them is not emphasized, the meanings to be expressed are consistent. For example, transmission can include sending and/or receiving, which can be a noun or a verb.

The equal to involved in the embodiments of the present application can be used in conjunction with greater than, and is applicable to the technical solution adopted when greater than, and can also be used in conjunction with less than, and is applicable to the technical solution adopted when less than. It should be noted that when equal to is used in conjunction with greater than, it cannot be used in conjunction with less than; when equal to is used in conjunction with less than, it cannot be used in conjunction with greater than.

Some terms involved in the embodiments of the present application are explained below to facilitate understanding by those skilled in the art.

1. Terminal equipment. In the embodiments of the present application, the terminal equipment is a device with wireless transceiver functions, which can be referred to as a terminal, user equipment (UE), mobile station (MS), mobile terminal (MT), access terminal equipment, vehicle-mounted terminal equipment, industrial control terminal equipment, UE unit, UE station, mobile station, remote station, remote terminal equipment, mobile device, UE terminal equipment, wireless communication equipment, UE agent or UE device, etc. The terminal equipment can be fixed or mobile. It should be noted that the terminal equipment can support at least one wireless communication technology, such as long term evolution (LTE), new radio (NR), etc. For example, the terminal device can be a mobile phone, a tablet computer, a desktop computer, a laptop computer, an all-in-one computer, a vehicle-mounted terminal, a virtual reality (VR) terminal device, an augmented reality (AR) terminal device, a wireless terminal in industrial control, a wireless terminal in self-driving, a wireless terminal in remote medical surgery, a wireless terminal in smart grid, a wireless terminal in transportation safety, a wireless terminal in smart city, a wireless terminal in smart home, a cellular phone, a cordless phone, a session initiation protocol,

SIP) phones, wireless local loop (WLL) stations, personal digital assistants (PDA) The terminal device may be a PDA, a handheld device with wireless communication function, a computing device or other processing device connected to a wireless modem, a wearable device, a terminal device in a future mobile communication network, or a terminal device in a future evolved public mobile land network (PLMN), etc. In some embodiments of the present application, the terminal device may also be a device with a transceiver function, such as a chip system. The chip system may include a chip and may also include other discrete devices.

2. Network equipment. In the embodiment of the present application, the network equipment is a device that provides wireless communication functions for terminal equipment, and can also be referred to as access network equipment, radio access network (RAN) equipment, etc. Among them, the network equipment can support at least one wireless communication technology, such as LTE, NR, etc. For example, the network equipment includes but is not limited to: the next generation base station (generation node B, gNB) in the fifth generation mobile communication system (5th-generation, 5G), evolved node B (evolved node B, eNB), radio network controller (radio network controller, RNC), node B (node B, NB), base station controller (base station controller, BSC), base transceiver station (base transceiver station, BTS), home base station (for example, home evolved node B, or home node B, HNB), baseband unit (baseband unit, BBU), transmitting and receiving point (transmitting and receiving point, TRP), transmitting point (transmitting point, TP), mobile switching center, etc. The network device may also be a wireless controller, a centralized unit (CU), and/or a distributed unit (DU) in a cloud radio access network (CRAN) scenario, or the network device may be a relay station, an access point, a vehicle-mounted device, a terminal device, a wearable device, a network device in future mobile communications, or a network device in a future evolving PLMN, etc. In some embodiments, the network device may also be a device having a wireless communication function for a terminal device, such as a chip system. For example, the chip system may include a chip and may also include other discrete devices.

Please refer to Figure 1a, which is a schematic diagram of the structure of a communication system provided in an embodiment of the present application. The communication system may include but is not limited to one or more network devices, one or more terminal devices, and as shown in Figure 1a, a network device 101 and a terminal device 102 are taken as an example, wherein the network device 101 in Figure 1a is a base station as an example, and the terminal device 102 is a mobile phone as an example, and the terminal device 102 can establish a wireless link with the network device 101 for communication. The communication system shown in Figure 1a includes but is not limited to network devices and terminal devices, and may also include other communication devices. The number and form of the devices shown in Figure 1a are used for example and do not constitute a limitation on the embodiments of the present application.

Before describing the communication method of the present application, the concepts involved in the present application are first explained:

1. Random access process

The following describes the four-step random access process in conjunction with FIG. 1b , which may specifically include the following steps:

Step 1: UE sends Msg1 (message 1) to the base station.

Specifically, the UE selects an SSB from the synchronization signal and PBCH block (SSB) that meets the conditions, and then selects a preamble, and sends a random access preamble at the physical random access channel transmission opportunity (PRACH transmission occasion, also written as PRACH occasion, abbreviated as RO) resource that is allowed to initiate, that is, sends Msg1.

Step 2: The base station sends Msg2 (i.e., message 2) to the UE.

UE receives the random access response sent by the base station, namely Msg2. Optionally, UE receives RAR data by detecting the physical downlink control channel (PDCCH) scrambled by random access RNTI (Random Access-RNTI, RA-RNTI), which includes the timing advance command and the uplink grant UL grant. The uplink grant carries the scheduling information for UE to send Msg3. Multiple UEs will select the same RO and preamble to initiate the random access process, which will cause conflicts, so the latter two steps are required to resolve the conflicts.

Step 3: The UE sends Msg3 (message 3) to the base station.

The UE uses the scheduling authorization received in Msg2 to send Msg3. For non-connected UEs, an RRC CCCH message is sent, which includes messages such as RRC establishment request RRCSetupRequest or RRC recovery request RRCResumeRequest or RRCResumeRequest1. Some of the information carried is used as UE identification for conflict resolution.

Step 4: The base station sends Msg4 (i.e., message 4) to the UE.

The base station sends Msg4 to the UE. The UE uses the TC-RNTI received in Msg3 to receive PDCCH and parses Msg4 carried in PDCCH. If the received data carries Contention Resolution Identity MAC CE, the conflict is considered to be resolved successfully.

2. The relationship between beam, SSB and random access channel opportunity (RACH Occasion, RO) resources

An NR cell can usually use multiple beams, and the network device sends SSB by beam scanning. The terminal device can identify different beams through the SSB sent by the cell, that is, there is a corresponding relationship between the SSB and the beam. The beam can be a transmitting beam used to send SSB, or it can be a receiving beam used to receive SSB, or it can be a spatial transmitting filter parameter used to send SSB, or it can be a spatial receiving filter parameter used to receive SSB. If there is a corresponding relationship between SSB1 and beam 1, and the terminal device detects that the signal quality (such as RSRP) of SSB1 sent by the network device is greater than or equal to the threshold value, it determines that beam 1 corresponding to SSB1 is an available beam.

There is also an association between SSB and random access channel opportunity (RACH Occasion, RO) resources. For example, it can be a one-to-one correspondence, or a many-to-1, or a one-to-many correspondence, and the specific association is configured by the service cell. The terminal device can initiate random access to the network device on the RO resource corresponding to the determined available beam, such as sending a message in the random access process on the RO resource. Take the above example to illustrate, that is, message 1 in the random access process is sent on the RO resource corresponding to SSB1. Among them, the correspondence can be configured by the network side through high-level signaling.

Optionally, when the terminal device is in a message 1 repeated transmission state or in a message 1 repeated transmission activation state, the terminal device does not expect the network side to configure multiple SSBs corresponding to one RO resource.

As shown in Fig. 1c, it is a schematic diagram of an association relationship between an SSB and an RO resource provided in an embodiment of the present application. As shown in the figure, one SSB can be associated with two RO resources. It is understandable that one SSB can also be associated with one RO resource.

3. QCL relationship

The channel large-scale characteristic parameters of two signals having a QCL relationship are correlated, and the correlation may refer to having the same channel large-scale characteristic parameters, or the channel large-scale characteristic parameters of one signal can be used to determine the channel large-scale characteristic parameters of another signal having a QCL relationship with the signal, or the difference between the channel large-scale characteristic parameters of the two signals is less than a certain threshold. The channel large-scale characteristic parameters may include at least one of the following: Doppler spread, Doppler shift, average delay, delay extension, spatial reception filter parameters, or spatial transmission filter parameters.

Specifically, QCL relationships can also include the following types:

'QCL-TypeA':{Doppler shift, Doppler spread, average delay, delay spread}

-'QCL-TypeB':{Doppler shift,Doppler spread}

-'QCL-TypeC':{Doppler shift,average delay}

'QCL-TypeD':{Spatial Rx parameter}

The QCL relationship mentioned in the present invention may be one or more of the above-mentioned QCL types, and the present invention is not limited thereto.

As shown in FIG. 2 , a flow chart of an embodiment of a message transmission method provided by the present application is shown. As shown in FIG. 2 , the method may include but is not limited to the following steps:

101, the network device sends message 4, and correspondingly, the terminal device receives message 4. The DMRS of the PDSCH carrying message 4 has a quasi-co-location QCL relationship with the first SSB of at least two SSBs, and the at least two SSBs are the SSBs corresponding to the repeated transmissions of message 1, or the DMRS of the PDSCH carrying message 4 has a QCL relationship with the reference signal of the PDSCH carrying message 2, or the DMRS of the PDSCH carrying message 4 has a QCL relationship with the reference signal of the physical uplink shared channel PUSCH carrying message 3. Optionally, all the QCL relationships mentioned in the present invention may specifically refer to spatial reception filter parameters or spatial transmission filter parameters or spatial filter parameters or specifically refer to QCL-Type D type or specifically refer to QCL-Type A type.

In the embodiment of the present application, the terminal device may repeatedly transmit message 1 multiple times to achieve coverage enhancement. Exemplarily, the repeated transmission of message 1 multiple times may correspond to at least two SSBs. The repeated transmission of message 1 multiple times corresponding to at least two SSBs may be understood as repeatedly sending message 1 using at least two different beams corresponding to the at least two SSBs, one SSB corresponding to one SSB. beams. It is understandable that the number of repeated transmissions of message 1 may be the same as or different from the number of corresponding SSBs. For example, two different beams corresponding to two SSBs may be used to implement four repeated transmissions of message 1, in which case the number of repeated transmissions of message 1 is different from the number of corresponding SSBs. Four different beams corresponding to four SSBs may also be used to implement four repeated transmissions of message 1, which is not limited in this application. In one implementation, the at least two SSBs may be selected by the terminal device based on the measurement results of the received multiple SSBs. For example, the received multiple SSBs may be sorted in order from high to low in signal quality, and the at least two SSBs may be the at least two SSBs sorted first. In another implementation, the at least two SSBs may be selected from SSBs whose signal quality meets certain conditions, and the condition may be, for example, that the reference signal receiving power (RSRP) of the SSB is greater than a certain threshold.

In a scenario where repeated transmission of message 1 corresponds to at least two SSBs, that is, message 1 is repeatedly transmitted using at least two different beams, the following example illustrates how to determine a signal having a QCL relationship with the DMRS of the PDSCH carrying message 4:

Mode 1: The DMRS of the PDSCH carrying message 4 has a QCL relationship with the first SSB of the at least two SSBs mentioned above.

In one implementation, the first SSB is the SSB corresponding to the first transmission among multiple repeated transmissions, or the first SSB is the SSB corresponding to the second transmission among multiple repeated transmissions; wherein the first transmission is the transmission with the earliest transmission time among the multiple repeated transmissions, and the second transmission is the transmission with the latest transmission time among the multiple repeated transmissions.

Specifically, optionally, the SSB corresponding to the earliest transmission in the repeated transmission of message 1 can be determined as a signal having a QCL relationship with the DMRS of the PDSCH carrying message 4. For example, the four repeated transmissions of message 1 correspond to two SSBs, namely SSB1 and SSB2. The four repeated transmissions of message 1 are, in chronological order, the first transmission message 1, the second transmission message 1, the third transmission message 1, and the fourth transmission message 1, wherein the first transmission message 1 and the third transmission message 1 correspond to SSB1, that is, the first transmission message 1 and the third transmission message 1 use the beam corresponding to SSB1, and the second transmission and the fourth transmission correspond to SSB2, that is, the second transmission and the fourth transmission use the beam corresponding to SSB2. The earliest transmission time is the first transmission message 1, and the SSB corresponding to the first transmission message 1 is SSB1. Therefore, SSB1 is used as the first SSB, and the first SSB has a QCL relationship with the DMRS of the PDSCH carrying message 4.

Specifically, optionally, the SSB corresponding to the latest transmission in the repeated transmission of message 1 can be determined as a signal having a QCL relationship with the DMRS of the PDSCH carrying message 4. For example, the four repeated transmissions of message 1 correspond to two SSBs, namely SSB1 and SSB2. The four repeated transmissions of message 1 are, in chronological order, the first transmission message 1, the second transmission message 1, the third transmission message 1, and the fourth transmission message 1, wherein the first transmission message 1 and the third transmission message 1 correspond to SSB1, that is, the first transmission message 1 and the third transmission message 1 are transmitted using The beam corresponding to SSB1, the second transmission and the fourth transmission correspond to SSB2, that is, the second transmission and the fourth transmission use the beam corresponding to SSB2. The latest transmission is the fourth transmission message 1, and the SSB corresponding to the fourth transmission message 1 is SSB2. Therefore, SSB2 is used as the first SSB, and the first SSB has a QCL relationship with the DMRS of the PDSCH carrying message 4.

In another implementation, the first SSB may be the SSB corresponding to the RO with the highest resource index number among the at least two RO resources associated with the at least two SSBs; or, the first SSB may be the SSB corresponding to the RO with the lowest resource index number among the at least two RO resources associated with the at least two SSBs; or, the first SSB may be the SSB corresponding to the RO resource with the highest frequency domain position among the at least two RO resources associated with the at least two SSBs; or, the first SSB may be the SSB corresponding to the RO resource with the lowest frequency domain position among the at least two RO resources associated with the at least two SSBs. For example, SSB1 is associated with RO1, SSB2 is associated with RO 2, and SSB3 is associated with RO 3, wherein RO1 has the lowest frequency domain position, followed by RO2 with the second lowest frequency domain position, and RO3 with the highest frequency domain position, therefore, SSB1 associated with RO1 may be the first SSB, or SSB3 associated with RO3 may be the first SSB.

Specifically and optionally, at least two RO resources associated with the at least two SSBs are determined, and the RO with the highest resource index number among the at least two RO resources is determined, and the SSB corresponding to the RO with the highest resource index number is used as the first SSB. For example, the at least two SSBs include SSB1, SSB2 and SSB3, wherein the association relationship between each SSB and the RO resource is shown in FIG1c. It can be understood that the association relationship shown in FIG1c is only an example and does not constitute a limitation on the present application. As shown in FIG1c, the resource index numbers of the at least two RO resources associated with SSB1, SSB2 and SSB3 are RO1, RO2, RO3, RO4, RO5 and RO6, respectively. Among them, the resource index number RO6 is the highest, therefore, SSB3 associated with RO6 is used as the first SSB, and the first SSB has a QCL relationship with the DMRS of the PDSCH carrying message 4.

Specifically and optionally, at least two RO resources associated with the at least two SSBs are determined, and the RO with the lowest resource index number among the at least two RO resources is determined, and the SSB corresponding to the RO with the lowest resource index number is used as the first SSB. For example, the at least two SSBs include SSB1, SSB2 and SSB3, wherein the association relationship between each SSB and the RO resource is shown in FIG1c. It can be understood that the association relationship shown in FIG1c is only an example and does not constitute a limitation on the present application. As shown in FIG1c, the resource index numbers of the at least two RO resources associated with SSB1, SSB2 and SSB3 are RO1, RO2, RO3, RO4, RO5 and RO6, respectively. Among them, the resource index number RO1 is the lowest, therefore, SSB1 associated with RO1 is used as the first SSB, and the first SSB has a QCL relationship with the DMRS of the PDSCH carrying message 4.

In another implementation, the first SSB may be the SSB with the lowest SSB index number among the at least two SSBs mentioned above, or the first SSB may be the SSB with the highest SSB index number among the at least two SSBs mentioned above.

Specifically, optionally, the SSB with the lowest SSB index number is determined from at least two SSBs, and the SSB with the lowest SSB index number is used as the first SSB. For example, the at least two SSBs include SSB1, SSB2, and SSB3, wherein SSB1 The index number is the lowest, so SSB1 is used as the first SSB, which has a QCL relationship with the DMRS of the PDSCH carrying message 4.

Specifically, optionally, the SSB with the highest SSB index number is determined from at least two SSBs, and the SSB with the highest SSB index number is used as the first SSB. For example, the at least two SSBs include SSB1, SSB2, and SSB3, among which SSB3 has the highest index number, so SSB3 is used as the first SSB, and the first SSB has a QCL relationship with the DMRS of the PDSCH carrying message 4.

Mode 2: The DMRS of the PDSCH carrying message 4 may have the same QCL relationship as the reference signal of the PDSCH carrying message 2.

Among them, the reference signal of the PDSCH carrying message 2 may be a DMRS. The DMRS of the PDSCH carrying message 4 has the same QCL relationship as the reference signal of the PDSCH carrying message 2, which can be understood as follows: the DMRS of the PDSCH of message 4 has a QCL relationship with the DMRS of the PDSCH of message 2, or the DMRS of the PDSCH of message 2 has a QCL relationship with the first signal, and the DMRS of the PDSCH of message 4 has a QCL relationship with the first signal. For example, if the DMRS of the PDSCH of message 2 has a QCL relationship with SSB-1, then the DMRS of the PDSCH of message 4 also has a QCL relationship with SSB-1.

Mode 3: The DMRS of the PDSCH carrying message 4 may have the same QCL relationship as the reference signal of the PUSCH carrying message 3.

Among them, the reference signal of the PDSCH carrying message 2 can be DMRS. The DMRS of the PDSCH carrying message 4 and the DMRS of the PUSCH carrying message 3 have the same QCL relationship, which can be understood as follows: the DMRS of the PDSCH of message 4 and the DMRS of the PUSCH of message 3 have a QCL relationship, or the DMRS of the PUSCH of message 3 has a QCL relationship with the second signal, and the DMRS of the PDSCH of message 4 has a QCL relationship with the second signal. For example, if the DMRS of the PUSCH of message 3 uses the same spatial filter coefficient as SSB1, then the DMRS of the PDSCH of message 4 can also use the same spatial filter coefficient as SSB1.

It can be understood that if the DMRS of the PDSCH carrying message 4 can have the same QCL relationship with the reference signal of the PUSCH carrying message 3, it can be understood that the spatial reception filtering parameters of the DMRS of the PDSCH carrying message 4 can be determined based on the spatial transmission filtering parameters of the DMRS of the PUSCH carrying message 3.

Please refer to Figure 3, which is a schematic diagram of the structure of a communication device provided in an embodiment of the present application. The device may be a terminal device, or a device in a terminal device, for example, a chip or chip module in the terminal device, or a device that can be used in conjunction with the terminal device. The communication device 300 shown in Figure 3 may include a receiving unit 301. Among them:

The receiving unit 301 is configured to receive a message 4, a demodulation parameter of a physical downlink shared channel PDSCH carrying the message 4, The reference signal DMRS has a quasi-co-site QCL relationship with the first SSB of at least two synchronization signal blocks SSB, and the at least two SSBs are the SSBs corresponding to the repeated transmissions of message 1, or the DMRS of the PDSCH carrying the message 4 has the same QCL relationship with the reference signal of the PDSCH carrying message 2, or the DMRS of the PDSCH carrying the message 4 has the same QCL relationship with the reference signal of the physical uplink shared channel PUSCH carrying message 3.

Among them, one SSB is associated with one or more RO resources.

The relevant contents of this implementation mode can be found in the relevant contents of the above method embodiment, and will not be described in detail here.

Please refer to Figure 4, which is a schematic diagram of the structure of a communication device provided in an embodiment of the present application. The device may be a network device, or a device in a network device, for example, a chip or chip module in the network device, or a device that can be used in conjunction with a network device. The communication device 400 shown in Figure 4 may include a sending unit 401. Among them:

The sending unit 401 is configured to send a message 4, wherein a demodulation reference signal DMRS of a physical downlink shared channel PDSCH carrying the message 4 has a quasi-co-location QCL relationship with a first SSB of at least two synchronization signal blocks SSB, wherein the at least two synchronization signal blocks SSB have a quasi-co-location QCL relationship. The SSB is the SSB corresponding to the repeated transmission of message 1, or the DMRS of the PDSCH carrying message 4 has the same QCL relationship with the reference signal of the PDSCH carrying message 2, or the DMRS of the PDSCH carrying message 4 has the same QCL relationship with the reference signal of the physical uplink shared channel PUSCH carrying message 3.

In a possible implementation manner, the first SSB is an SSB corresponding to an RO with the highest resource index number among the at least two random access opportunity RO resources associated with the at least two SSBs; or,

The first SSB is the SSB corresponding to the RO with the lowest resource index number among the at least two RO resources associated with the at least two SSBs; or,

Among them, one SSB is associated with one or more RO resources.

In a possible implementation, the QCL relationship includes correlation with large-scale channel characteristics, and the large-scale channel characteristics include at least one of the following: Doppler spread, Doppler shift, average delay, delay extension, spatial reception filter parameters, and spatial transmission filter parameters.

Please refer to FIG. 5, which is a schematic diagram of the structure of another communication device provided in an embodiment of the present application, which is used to implement the functions of the terminal device in FIG. 2 above. The communication device 500 can be a terminal device or a device for a terminal device. The device for a terminal device can be a chip system or a chip in the terminal device. Among them, the chip system can be composed of a chip, or it can include a chip and other discrete devices.

The communication device can also be used to implement the functions of the network device in FIG. 2. The communication device 500 can be a network device or a device for a network device. The device for a network device can be a chip system or chip in a network device. A chip system can be composed of chips or include chips and other discrete devices.

The communication device 500 includes at least one processor 520, which is used to implement the data processing function of the terminal device or network device in the method provided in the embodiment of the present application. The communication device 500 may also include a communication interface 510, which is used to implement the transceiver operation of the terminal device or network device in the method provided in the embodiment of the present application. In the embodiment of the present application, the processor 520 may be a central processing unit (CPU), and the processor may also be other general-purpose processors, digital signal processors (DSP), application-specific integrated circuits (ASIC), field-programmable gate arrays (FPGA) or other programmable logic devices, discrete gates or transistor logic devices, discrete hardware components, etc. The general-purpose processor may be a microprocessor or the processor may also be any conventional processor, etc. In the embodiment of the present application, the communication interface 510 may be a transceiver, circuit, bus, module or other type of communication interface, which is used to communicate with other devices through a transmission medium. For example, the communication interface 510 is used for the device in the communication device 500 to communicate with other devices. The processor 520 uses the communication interface 510 to send and receive data, and is used to implement the method described in FIG. 2 of the above method embodiment.

The communication device 500 may also include at least one memory 530 for storing program instructions and/or data. The memory 530 is coupled to the processor 520. The coupling in the embodiment of the present application is an indirect coupling or communication connection between devices, units or modules, which may be electrical, mechanical or other forms, and is used for information exchange between devices, units or modules. The processor 520 may operate in conjunction with the memory 530. The processor 520 may execute program instructions stored in the memory 530. At least one of the at least one memory may be included in the processor.

When the communication device 500 is turned on, the processor 520 can read the software program in the memory 530, interpret and execute the instructions of the software program, and process the data of the software program. When data needs to be sent wirelessly, the processor 520 performs baseband processing on the data to be sent, and outputs the baseband signal to the radio frequency circuit (not shown in Figure 5). The radio frequency circuit performs radio frequency processing on the baseband signal and then sends the radio frequency signal outward through the antenna in the form of electromagnetic waves. When data is sent to the communication device 500, the radio frequency circuit receives the radio frequency signal through the antenna, converts the radio frequency signal into a baseband signal, and outputs the baseband signal to the processor 520. The processor 520 converts the baseband signal into data and processes the data.

In another implementation, the RF circuit and antenna may be arranged independently from the processor 520 that performs baseband processing. For example, in a distributed scenario, the RF circuit and antenna may be arranged remotely from the communication device.

The specific connection medium between the communication interface 510, the processor 520 and the memory 530 is not limited in the embodiment of the present application. In FIG. 5 , the memory 530, the processor 520 and the communication interface 510 are connected via a bus 540. The bus is represented by a bold line in FIG. 5 . The connection mode between other components is only for schematic illustration and is not intended to be limiting. The bus can be divided into an address bus, a data bus, a control bus, etc. For ease of representation, only one bold line is used in FIG. 5 , but it does not mean that there is only one bus or one type of bus.

When the communication device 500 is specifically used in a terminal device, for example, when the communication device 500 is specifically a chip or a chip system, the communication interface 510 may output or receive a baseband signal. When the communication device 500 is specifically a terminal device, the communication interface 510 may output or receive a radio frequency signal.

It should be noted that the communication device can execute the relevant steps of the terminal device or network device in the aforementioned method embodiment. For details, please refer to the implementation methods provided in the above steps, which will not be repeated here.

For each device or product applied to or integrated in a communication device, each module contained therein may be implemented in the form of hardware such as circuits, and different modules may be located in the same component (for example, a chip, a circuit module, etc.) or in different components within the terminal, or at least some of the modules may be implemented in the form of a software program that runs on a processor integrated within the terminal, and the remaining (if any) modules may be implemented in the form of hardware such as circuits.

The above-mentioned memory may be a volatile memory or a non-volatile memory, or may include both volatile and non-volatile memories. Among them, 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), which is used as an external cache. By way of example and not limitation, many forms of random access memory (RAM) are available, such as static ram (SRAM), dynamic random access memory (DRAM), synchronous DRAM (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 rambus RAM (DR RAM).

The embodiment of the present application provides a chip. The chip includes: a processor and a memory. The number of processors can be one or more, and the number of memories can be one or more. The processor can execute the message transmission method shown in FIG. 2 and the steps executed in the related implementation method by reading instructions and data stored in the memory.

As shown in Figure 6, Figure 6 is a schematic diagram of the structure of a module device provided in an embodiment of the present application. The module device 600 can execute the relevant steps of the terminal device or network device in the aforementioned method embodiment, and the module device 600 includes: a communication module 601, a power module 602, a storage module 603 and a chip module 604. Among them, the power module 602 is used to provide power to the module device; the storage module 603 is used to store data and/or instructions; the communication module 601 is used to communicate with external devices; the chip module 604 is used to call the data and/or instructions stored in the storage module 603. In combination with the communication module 601, the message transmission method shown in Figure 2 above and the steps performed by the relevant implementation method can be executed.

The present application also provides a computer-readable storage medium which stores a computer program, wherein the computer program includes program instructions, and when an electronic device executes the program instructions, the steps executed by the terminal device in the message transmission method shown in FIG. 2 are implemented.

The computer-readable storage medium may be an internal storage unit of the terminal device described in any of the aforementioned embodiments, such as a hard disk or memory of the device. The computer-readable storage medium may also be an external storage device of the terminal device or network device, such as a plug-in hard disk, a smart media card (SMC), a secure digital (SD) card, a flash card, etc. equipped on the device. Further, the computer-readable storage medium may also include both an internal storage unit of the terminal device or network device and an external storage device. The computer-readable storage medium is used to store the computer program and other programs and data required by the terminal device or network device. The computer-readable storage medium may also be used to temporarily store data that has been output or is to be output. The computer-readable storage medium may be any available medium that can be accessed by a computer or a data storage device such as a server or a data center that includes one or more available media sets. The available medium may be a magnetic medium (e.g., a floppy disk, a hard disk, a tape), an optical medium (e.g., a high-density digital video disc (DVD)), or a semiconductor medium. The semiconductor medium may be a solid-state hard disk.

Regarding the various modules/units included in the various devices and products described in the above embodiments, they can be software modules/units, or hardware modules/units, or they can be partially software modules/units and partially hardware modules/units. For example, for various devices and products applied to or integrated in a chip, the various modules/units included therein can all be implemented in the form of hardware such as circuits, or at least some of the modules/units can be implemented in the form of software programs, which run on a processor integrated inside the chip, and the remaining (if any) modules/units can be implemented in the form of hardware such as circuits; for various devices and products applied to or integrated in a chip module, the various modules/units included therein can all be implemented in the form of hardware such as circuits, and different modules/units can be located in the same component of the chip module (such as a chip, circuit module, etc.) or in different components, or at least some of the modules/units can be implemented in the form of software programs. It is implemented in the form of a software program, which runs on a processor integrated inside the chip module, and the remaining (if any) modules/units can be implemented in the form of hardware such as circuits; for each device or product applied to or integrated in the data acquisition node, each module/unit contained therein can be implemented in the form of hardware such as circuits, and different modules/units can be located in the same component (for example, chip, circuit module, etc.) or in different components in the terminal, or, at least some modules/units can be implemented in the form of a software program, which runs on a processor integrated inside the data acquisition node, and the remaining (if any) modules/units can be implemented in the form of hardware such as circuits.

The above embodiments may be implemented in whole or in part by software, hardware, firmware or any other combination. When implemented by software, the above embodiments may be implemented in whole or in part in the form of a computer program product. The product includes one or more computer instructions or computer programs. When the computer instructions or computer programs are loaded or executed on a computer, the process or function described in 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 one website site, computer, server or data center to another website site, computer, server or data center by wired or wireless means.

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.

In the several embodiments provided in the present application, it should be understood that the disclosed methods, devices and systems can be implemented in other ways. For example, the device embodiments described above are merely schematic; for example, the division of the units is only a logical function division, and there may be other division methods in actual implementation; for example, multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of devices or units, which can be electrical, mechanical or other forms.

The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

In addition, each functional unit in each embodiment of the present invention may be integrated into one processing unit, or each unit may be physically included separately, or two or more units may be integrated into one unit. The above-mentioned integrated unit may be implemented in the form of hardware or in the form of hardware plus software functional units.

The above-mentioned integrated unit implemented in the form of a software functional unit can be stored in a computer-readable storage medium. The above-mentioned software functional unit is stored in a storage medium, including a number of instructions for enabling a computer device (which can be a personal computer, a server, or a gateway node, etc.) to perform some steps of the method described in each embodiment of the present invention.

Those skilled in the art can understand that all or part of the processes in the above-mentioned embodiments can be implemented by instructing the relevant hardware through a computer program, and the program can be stored in a computer-readable storage medium. When the program is executed, it can include the processes of the embodiments of the above-mentioned methods. The storage medium can be a disk, an optical disk, a read-only memory (ROM) or a random access memory (RAM), etc.

The above disclosure is only a preferred embodiment of the present application, and certainly cannot be used to limit the scope of rights of the present application. Those skilled in the art can understand that all or part of the processes of the above embodiments can be implemented, and equivalent changes made according to the claims of this application are still within the scope of the application.

Claims

A message transmission method, characterized by comprising:

Receive message 4, the demodulation reference signal DMRS of the physical downlink shared channel PDSCH carrying the message 4 has a quasi-co-site QCL relationship with the first SSB of at least two synchronization signal blocks SSB, and the at least two SSBs are the SSBs corresponding to the repeated transmissions of message 1, or, the DMRS of the PDSCH carrying the message 4 has the same QCL relationship with the reference signal of the PDSCH carrying message 2, or, the DMRS of the PDSCH carrying the message 4 has the same QCL relationship with the reference signal of the physical uplink shared channel PUSCH carrying message 3.
The method as claimed in claim 1 is characterized in that the first SSB is the SSB corresponding to the first transmission in the repeated multiple transmissions; or; the first SSB is the SSB corresponding to the second transmission in the repeated multiple transmissions; wherein the first transmission is the transmission with the earliest transmission time in the repeated multiple transmissions, and the second transmission is the transmission with the latest transmission time in the repeated multiple transmissions.
The method according to claim 1, characterized in that the first SSB is the SSB corresponding to the RO resource with the highest resource index number among the at least two random access opportunity RO resources associated with the at least two SSBs; or

The first SSB is the SSB corresponding to the RO resource with the lowest resource index number among the at least two RO resources associated with the at least two SSBs; or,

The first SSB is the SSB corresponding to the RO resource with the highest frequency domain position among the at least two RO resources associated with the at least two SSBs; or

The first SSB is the SSB corresponding to the RO resource with the lowest frequency domain position among the at least two RO resources associated with the at least two SSBs;

Among them, one SSB is associated with one or more RO resources.
The method according to claim 1, wherein the first SSB is the SSB with the lowest SSB index number among the at least two SSBs; or

The first SSB is the SSB with the highest SSB index number among the at least two SSBs.
The method according to any one of claims 1 to 4 is characterized in that the QCL relationship includes correlation with large-scale characteristic parameters of the channel, and the large-scale characteristic parameters of the channel include at least one of the following: Doppler spread, Doppler shift, average delay, delay extension, spatial reception filter parameters, and spatial transmission filter parameters.
The method as claimed in claim 1 is characterized in that the at least two SSBs are SSBs whose signal quality meets the first condition among the received multiple SSBs.
The method as claimed in claim 6 is characterized in that the first condition includes: the reference signal received power RSRP of the at least two SSBs is greater than a threshold.
A message transmission method, characterized by comprising:

Message 4 is sent, and the demodulation reference signal DMRS of the physical downlink shared channel PDSCH carrying the message 4 has a quasi-co-site QCL relationship with the first SSB of at least two synchronization signal blocks SSB, and the at least two SSBs are the SSBs corresponding to the repeated transmissions of message 1, or, the DMRS of the PDSCH carrying the message 4 has the same QCL relationship with the reference signal of the PDSCH carrying message 2, or, the DMRS of the PDSCH carrying the message 4 has the same QCL relationship with the reference signal of the physical uplink shared channel PUSCH carrying message 3.
The method as claimed in claim 8 is characterized in that the first SSB is the SSB corresponding to the first transmission in the repeated multiple transmissions; or; the first SSB is the SSB corresponding to the second transmission in the repeated multiple transmissions; wherein the first transmission is the transmission with the earliest transmission time in the repeated multiple transmissions, and the second transmission is the transmission with the latest transmission time in the repeated multiple transmissions.
The method according to claim 8, characterized in that the first SSB is the SSB corresponding to the RO resource with the highest resource index number among the at least two random access opportunity RO resources associated with the at least two SSBs; or

The first SSB is the SSB corresponding to the RO resource with the lowest resource index number among the at least two RO resources associated with the at least two SSBs; or,

The first SSB is the SSB corresponding to the RO resource with the highest frequency domain position among the at least two RO resources associated with the at least two SSBs; or

The first SSB is the SSB corresponding to the RO resource with the lowest frequency domain position among the at least two RO resources associated with the at least two SSBs;

Among them, one SSB is associated with one or more RO resources.
The method according to claim 8, wherein the first SSB is an SSB among the at least two SSBs. The lowest indexed SSB; or,

The first SSB is the SSB with the highest SSB index number among the at least two SSBs.
The method as claimed in claim 8 is characterized in that the QCL relationship includes correlation with large-scale channel characteristic parameters, and the large-scale channel characteristics include at least one of the following: Doppler spread, Doppler shift, average delay, delay extension, spatial reception filter parameters, and spatial transmission filter parameters.
The method as claimed in claim 8 is characterized in that the at least two SSBs are SSBs whose signal quality meets the first condition among the received multiple SSBs.
The method as claimed in claim 13 is characterized in that the first condition includes: the reference signal received power RSRP of the at least two SSBs is greater than a threshold.
A communication device, comprising:

A receiving unit is used to receive message 4, wherein the demodulation reference signal DMRS of a physical downlink shared channel PDSCH carrying the message 4 has a quasi-co-site QCL relationship with the first SSB of at least two synchronization signal blocks SSB, and the at least two SSBs are the SSBs corresponding to the repeated transmissions of message 1, or the DMRS of the PDSCH carrying the message 4 has the same QCL relationship with the reference signal of the PDSCH carrying message 2, or the DMRS of the PDSCH carrying the message 4 has the same QCL relationship with the reference signal of the physical uplink shared channel PUSCH carrying message 3.
A communication device, comprising:

A sending unit is used to send message 4, and the demodulation reference signal DMRS of the physical downlink shared channel PDSCH carrying the message 4 has a quasi-co-site QCL relationship with the first SSB of at least two synchronization signal blocks SSB, and the at least two SSBs are the SSBs corresponding to the repeated transmissions of message 1, or the DMRS of the PDSCH carrying the message 4 has the same QCL relationship with the reference signal of the PDSCH carrying message 2, or the DMRS of the PDSCH carrying the message 4 has the same QCL relationship with the reference signal of the physical uplink shared channel PUSCH carrying message 3.
A communication device, characterized in that the communication device comprises a processor and a memory, the processor and the memory are connected to each other, wherein the memory is used to store a computer program, the computer program comprises program instructions, the processor calls the program instructions to execute the method according to any one of claims 1 to 7, or executes the method according to claim The method according to any one of claims 8 to 14.
A chip, characterized in that the chip includes a processor and an interface, the processor and the interface are coupled; the interface is used to receive or output signals, and the processor is used to execute code instructions to execute the method according to any one of claims 1 to 7, or to execute the method according to any one of claims 8 to 14.
A module device, characterized in that the module device includes a communication module, a power module, a storage module and a chip module, wherein:

The power module is used to provide electrical energy to the module device;

The storage module is used to store data and/or instructions;

The communication module is used to communicate with external devices;

The chip module is used to call the data and/or instructions stored in the storage module, and in combination with the communication module, execute the method described in any one of claims 1 to 7, or execute the method described in any one of claims 8-14.
A computer-readable storage medium, characterized in that the computer-readable storage medium stores a computer program, the computer program includes program instructions, and when an electronic device executes the program instructions, it implements the method according to any one of claims 1 to 7, or implements the method according to any one of claims 8 to 14.