CN116489807A

CN116489807A - Method and device for transmitting information

Info

Publication number: CN116489807A
Application number: CN202210051200.4A
Authority: CN
Inventors: 赵泽涵; 李翔
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2022-01-17
Filing date: 2022-01-17
Publication date: 2023-07-25
Also published as: WO2023134681A1

Abstract

The embodiment of the application provides a method and a device for transmitting information, wherein the method comprises the following steps: receiving configuration information of at least one reference signal, wherein the configuration information of the at least one reference signal comprises configuration information of a first reference signal; receiving the first reference signal based on configuration information of the first reference signal; and receiving a first message based on a first transmission relation, wherein the first transmission relation indicates that the first reference signal and the first message have the same or similar spatial characteristic parameters, the first message is used for random access, or the first message is a message before the first receiving of the reference signal configuration information special for the terminal equipment after random access, and the message is carried on a PDSCH or a PDCCH for scheduling the PDSCH. Therefore, the terminal equipment obtains more accurate channel conditions of the first message according to the first transmission relation between the first reference signal and the first message, and the success rate of receiving the first message is improved.

Description

Method and device for transmitting information

Technical Field

Embodiments of the present application relate to the field of communications, and more particularly, to a method and apparatus for transmitting information.

Background

Currently, before receiving configuration information of dedicated reference signals (e.g., channel state information reference signals (channel state information reference signal, CSI-RS), tracking reference signals (tracking reference signal, TRS)) allocated to the terminal device for the first time, the terminal device generally receives a PDSCH and/or a PDCCH transmitted by the network device according to a quasi co-location (QCL) relationship between a synchronization signal broadcast channel block (synchronization signal and PBCH block, SSB) and a physical downlink shared channel (physical downlink shared channel, PDSCH) and/or a physical downlink control channel (physical downlink control channel, PDCCH). Wherein the PDSCH may carry a message in a random access procedure, for example, a random access response (random access response, RAR) in a contention-based four-step random access procedure, a message 4, or a message B in a contention-based two-step random access procedure, and the PDCCH may be a PDCCH for scheduling the PDSCH.

However, in a practical scenario, according to the QCL relationship between the SSB and the PDSCH and/or the PDCCH, the terminal device may not accurately receive the PDSCH and/or the PDCCH, resulting in a decrease in the reception performance of the PDSCH and/or the PDCCH, and further, a lower success rate of data reception, and no better solution has been provided to solve the problem at present.

Disclosure of Invention

The embodiment of the application provides a method and a device for transmitting information, which can improve the success rate of data reception.

In a first aspect, there is provided a method of transmitting information, the method comprising: receiving configuration information of at least one reference signal, wherein the configuration information of the at least one reference signal comprises configuration information of a first reference signal; receiving the first reference signal based on configuration information of the first reference signal; and receiving a first message based on a first transmission relation, wherein the first transmission relation indicates that the first reference signal and the first message have the same or similar spatial characteristic parameters, the first message is used for random access, or the first message is a message before the first receiving of the reference signal configuration information special for the terminal equipment after random access, and the message is carried on a physical downlink shared channel PDSCH or a physical downlink control channel PDCCH for scheduling the PDSCH.

Alternatively, the reference signal may be a channel state information reference signal CSI-RS or a tracking reference signal TRS.

Optionally, the first message is used for random access, and the first message includes, but is not limited to, the following: RAR in contention-based four-step random access, message 4 in contention-based four-step random access, and message B in contention-based two-step random access.

Optionally, the first message is a message carried on the physical downlink shared channel PDSCH before the first time of receiving the reference signal configuration information specific to the terminal device after the random access, or the first message is a physical downlink control channel PDCCH for scheduling the physical downlink shared channel PDSCH before the first time of receiving the reference signal configuration information specific to the terminal device after the random access.

According to the information transmission method, the terminal equipment can receive the first message by adopting the spatial characteristic parameters which are the same as or similar to the first reference signal, so that the terminal equipment can be ensured to receive the first message more accurately based on the first transmission relation, the receiving performance of the first message can be improved, and the success rate of the first message access is improved. Meanwhile, by utilizing the method provided by the embodiment, the terminal equipment can also more accurately receive the message before the special reference signal configuration information of the terminal equipment is received for the first time after random access, so that different first message receiving success rates are improved.

With reference to the first aspect, in certain implementations of the first aspect, the configuration information of the at least one reference signal is configuration information of a plurality of reference signals, the configuration information of the plurality of reference signals corresponds to a plurality of reference signals, the plurality of reference signals includes the first reference signal, and the method further includes: first indication information is received, wherein the first indication information is used for indicating the identification of the first reference signal.

According to the information transmission method, the terminal equipment can accurately determine the first reference signal according to the first indication information sent by the network equipment, so that the first reference signal determined by the terminal equipment and the first reference signal determined by the network equipment can be ensured to be identical. The terminal device may receive the first message using the same or similar spatial characteristic parameter as the first reference signal, thereby improving the success rate of receiving the first message.

With reference to the first aspect, in certain implementations of the first aspect, the first indication information is carried on a random access response RAR in a contention-based four-step random access, a message 4 in a contention-based four-step random access, a message B in a contention-based two-step random access, a PDCCH scheduling the RAR, a PDCCH scheduling the message 4, a PDCCH scheduling the message B, or a PDCCH scheduling a retransmission message 3.

In the scheme provided by the embodiment of the application, the first indication information can be borne on RAR, message 4, message B and PDCCH for scheduling the message or PDCCH for scheduling retransmission message 3 in random access, so that the terminal equipment can be ensured to accurately determine the first reference signal according to the first indication information sent by the network equipment.

With reference to the first aspect, in certain implementations of the first aspect, the configuration information of the at least one reference signal is configuration information of a plurality of reference signals, the configuration information of the plurality of reference signals corresponds to a plurality of reference signals, the plurality of reference signals includes the first reference signal, and the method further includes: determining the first reference signal from the plurality of reference signals; and sending second indicating information, wherein the second indicating information is used for indicating the identification of the first reference signal.

According to the information transmission method, the terminal equipment can determine the first reference signal and indicate the network equipment through the second indication information, so that the first reference signal determined by the terminal equipment and the first reference signal determined by the network equipment can be identical. The terminal device may receive the first message using the same or similar spatial characteristic parameter as the first reference signal, thereby improving the success rate of receiving the first message.

With reference to the first aspect, in certain implementations of the first aspect, the second indication information is carried on message 3 in the contention-based four-step random access, message a in the contention-based two-step random access, or a PDCCH scheduling the message 3.

In the scheme provided by the embodiment of the application, the second indication information can be borne on the message 3, the message A or the PDCCH of the scheduling message 3 in random access, so that the network equipment can be ensured to accurately determine the first reference signal according to the second indication information.

With reference to the first aspect, in certain implementations of the first aspect, the second indication information is a random access preamble in a contention-based four-step random access, the random access preamble having a correspondence with the first reference signal.

In the solution provided in the embodiment of the present application, the second indication information may be a random access preamble, and the network device may accurately determine the first reference signal according to the second indication message.

With reference to the first aspect, in certain implementations of the first aspect, the spatial characteristic parameter is one or more of: delay spread, doppler shift, average delay, average gain, and spatial reception parameters.

With reference to the first aspect, in certain implementations of the first aspect, the configuration information of the reference signal, the first reference signal is broadcast periodically.

In a second aspect, there is provided a method of transmitting information, the method comprising: transmitting configuration information of at least one reference signal, the configuration information of the at least one reference signal including configuration information of a first reference signal; transmitting the first reference signal based on configuration information of the first reference signal; and sending a first message based on a first transmission relation, wherein the first transmission relation indicates that the first reference signal and the first message have the same or similar spatial characteristic parameters, the first message is used for random access, or the first message is a message before the first receiving of the reference signal configuration information special for the terminal equipment after random access, and the message is carried on a physical downlink shared channel PDSCH or a physical downlink control channel PDCCH for scheduling the PDSCH.

According to the method for transmitting information, the network equipment can transmit the first message by adopting the spatial characteristic parameters which are the same as or similar to the first reference signal, so that the terminal equipment can more accurately receive the first message based on the first transmission relation, the receiving performance of the first message can be improved, and the receiving success rate of the first message is improved.

With reference to the second aspect, in certain implementations of the second aspect, the configuration information of the at least one reference signal is configuration information of a plurality of reference signals, the configuration information of the plurality of reference signals corresponds to a plurality of reference signals, the plurality of reference signals includes the first reference signal, and the method further includes: and determining the first reference signal from the plurality of reference signals, and sending first indication information, wherein the first indication information is used for indicating the identification of the first reference signal.

According to the information transmission method, the network equipment can determine the first reference signal and indicate the terminal equipment through the first indication information, so that the first reference signal determined by the terminal equipment and the network equipment can be ensured to be the same. The terminal equipment can receive the first message by adopting the spatial characteristic parameters which are the same as or similar to the first reference signal, and can more accurately receive the first message based on the first transmission relation, so that the receiving performance of the first message can be improved, and the receiving success rate of the first message is improved.

With reference to the second aspect, in certain implementations of the second aspect, the first indication information is carried on a random access response RAR in a contention-based four-step random access, a message 4 in a contention-based four-step random access, or a message B in a contention-based two-step random access, a PDCCH scheduling the RAR, a PDCCH scheduling the message 4, a PDCCH scheduling the message B, or a PDCCH scheduling a retransmission message 3.

In the solution provided in the embodiment of the present application, the first indication information may be carried on an RAR, a message 4, a message B, and a PDCCH for scheduling the above message or a PDCCH for scheduling a retransmission message 3 in random access, so that the terminal device accurately determines the first reference signal according to the first indication information sent by the network device.

With reference to the second aspect, in certain implementations of the second aspect, the configuration information of the at least one reference signal is configuration information of a plurality of reference signals, the configuration information of the plurality of reference signals corresponds to a plurality of reference signals, the plurality of reference signals includes the first reference signal, and the method further includes: receiving second indication information, wherein the second indication information is used for indicating the identification of the first reference signal; the first reference signal is determined according to the second indication information.

According to the information transmission method, the network equipment accurately determines the first reference signal according to the second indication information sent by the terminal equipment, so that the first reference signal determined by the terminal equipment and the network equipment can be ensured to be identical. The terminal equipment can receive the first message by adopting the spatial characteristic parameters which are the same as or similar to the first reference signal, and can more accurately receive the first message based on the first transmission relation, so that the receiving performance of the first message can be improved, and the receiving power of the first message can be improved.

With reference to the second aspect, in some implementations of the second aspect, the second indication information is carried on message 3 in the contention-based four-step random access, message a in the contention-based two-step random access, or PDCCH scheduling the message 3.

With reference to the second aspect, in some implementations of the second aspect, the second indication information is a random access preamble in a contention-based four-step random access, the random access preamble having a correspondence with the first reference signal.

With reference to the second aspect, in certain implementations of the second aspect, the spatial characteristic parameter is one or more of: delay spread, doppler shift, average delay, average gain, and spatial reception parameters.

With reference to the second aspect, in certain implementations of the second aspect, the configuration information of the reference signal, the first reference signal, is broadcast periodically.

In a third aspect, there is provided an apparatus for transmitting information, the apparatus comprising: and a transmitting/receiving unit. The receiving and transmitting unit is used for: receiving configuration information of at least one reference signal, wherein the configuration information of the at least one reference signal comprises configuration information of a first reference signal; receiving the first reference signal based on configuration information of the first reference signal; and receiving a first message based on a first transmission relation, wherein the first transmission relation indicates that the first reference signal and the first message have the same or similar spatial characteristic parameters, the first message is used for random access, or the first message is a message before the first receiving of the reference signal configuration information special for the terminal equipment after random access, and the message is carried on a physical downlink shared channel PDSCH or a physical downlink control channel PDCCH for scheduling the PDSCH.

With reference to the third aspect, in some implementations of the third aspect, the configuration information of the at least one reference signal is configuration information of a plurality of reference signals, the configuration information of the plurality of reference signals corresponds to a plurality of reference signals, the plurality of reference signals includes the first reference signal, and the transceiver unit is specifically configured to: first indication information is received, wherein the first indication information is used for indicating the identification of the first reference signal.

With reference to the third aspect, in some implementations of the third aspect, the first indication information is carried on a random access response RAR in a contention-based four-step random access, a message 4 in a contention-based four-step random access, a message B in a contention-based two-step random access, a PDCCH scheduling the RAR, a PDCCH scheduling the message 4, a PDCCH scheduling the message B, or a PDCCH scheduling a retransmission message 3.

With reference to the third aspect, in certain implementations of the third aspect, the configuration information of the at least one reference signal is configuration information of a plurality of reference signals, the configuration information of the plurality of reference signals corresponds to a plurality of reference signals, the plurality of reference signals includes the first reference signal, and the apparatus further includes a processing unit configured to determine the first reference signal from the plurality of reference signals; the transceiver unit is specifically configured to send second indication information, where the second indication information is used to indicate the identifier of the first reference signal.

With reference to the third aspect, in some implementations of the third aspect, the second indication information is carried on message 3 in the contention-based four-step random access, message a in the contention-based two-step random access, or a PDCCH scheduling the message 3.

With reference to the third aspect, in some implementations of the third aspect, the second indication information is a random access preamble in a contention-based four-step random access, where the random access preamble has a correspondence with the first reference signal.

With reference to the third aspect, in certain implementations of the third aspect, the spatial characteristic parameter is one or more of: delay spread, doppler shift, average delay, average gain, and spatial reception parameters.

With reference to the third aspect, in certain implementations of the third aspect, the configuration information of the reference signal, the first reference signal, is broadcast transmitted periodically.

The advantages of the apparatus according to the third aspect may refer to those of the method according to the first aspect, and will not be described herein.

In a fourth aspect, there is provided an apparatus for transmitting information, the apparatus comprising: and a transmitting/receiving unit. The receiving and transmitting unit is used for: transmitting configuration information of at least one reference signal, the configuration information of the at least one reference signal including configuration information of a first reference signal; transmitting the first reference signal based on configuration information of the first reference signal; and sending a first message based on a first transmission relation, wherein the first transmission relation indicates that the first reference signal and the first message have the same or similar spatial characteristic parameters, the first message is used for random access, or the first message is a message before the first receiving of the reference signal configuration information special for the terminal equipment after random access, and the message is carried on a physical downlink shared channel PDSCH or a physical downlink control channel PDCCH for scheduling the PDSCH.

With reference to the fourth aspect, in certain implementations of the fourth aspect, the configuration information of the at least one reference signal is configuration information of a plurality of reference signals, the configuration information of the plurality of reference signals corresponding to the plurality of reference signals, the plurality of reference signals including the first reference signal, and the apparatus further includes a processing unit configured to determine the first reference signal from the plurality of reference signals; the transceiver unit is specifically configured to send first indication information, where the first indication information is used to indicate an identifier of the first reference signal.

With reference to the fourth aspect, in some implementations of the fourth aspect, the first indication information is carried on a random access response RAR in a contention-based four-step random access, a message 4 in a contention-based four-step random access, a message B in a contention-based two-step random access, a PDCCH scheduling the RAR, a PDCCH scheduling the message 4, a PDCCH scheduling the message B, or a PDCCH scheduling a retransmission message 3.

With reference to the fourth aspect, in some implementations of the fourth aspect, the configuration information of the at least one reference signal is configuration information of a plurality of reference signals, the configuration information of the plurality of reference signals corresponds to a plurality of reference signals, the plurality of reference signals include the first reference signal, and the transceiver unit is specifically configured to receive second indication information, where the second indication information is used to indicate an identification of the first reference signal; the processing unit is specifically configured to determine the first reference signal according to the second indication information.

With reference to the fourth aspect, in some implementations of the fourth aspect, the second indication information is carried on message 3 in the contention-based four-step random access, message a in the contention-based two-step random access, or PDCCH scheduling the message 3.

With reference to the fourth aspect, in some implementations of the fourth aspect, the second indication information is a random access preamble in a contention-based four-step random access, the random access preamble having a correspondence with the first reference signal.

With reference to the fourth aspect, in certain implementations of the fourth aspect, the spatial characteristic parameter is one or more of: delay spread, doppler shift, average delay, average gain, and spatial reception parameters.

With reference to the fourth aspect, in some implementations of the fourth aspect, the configuration information of the reference signal, the first reference signal, is broadcast periodically.

The advantages of the device according to the fourth aspect may refer to the advantages of the method according to the second aspect, and are not described herein.

In a fifth aspect, there is provided a communication apparatus comprising: at least one processor and a communication interface for information interaction by the communication device with other communication devices, which when executed in the at least one processor causes the communication device to perform the method of the first aspect or any one of the possible implementations of the first aspect.

Optionally, the communication device may further comprise a memory coupled to the processor for implementing the method described in the first aspect or any of the possible implementations of the first aspect. The memory is for storing instructions and data, and the processor, when executing the instructions stored in the memory, may implement the method described in the first aspect or any one of the possible implementations of the first aspect.

Alternatively, the communication interface may be a transceiver, circuit, bus, module, pin, or other type of communication interface.

Alternatively, the communication apparatus of the fifth aspect may be a terminal device, or may be a component (e.g., a chip or a circuit, etc.) for a terminal device. The other communication means may be a network device or may be a component (e.g. a chip or a circuit etc.) for a network device.

In a sixth aspect, there is provided a communication apparatus comprising: at least one processor and a communication interface for information interaction by the communication device with other communication devices, which when executed in the at least one processor causes the communication device to perform the method of the second aspect or any of the possible implementations of the second aspect.

Optionally, the communication device may further comprise a memory coupled to the processor for implementing the method described in the second aspect or any one of the possible implementations of the second aspect. The memory is for storing instructions and data, and the processor, when executing the instructions stored in the memory, may implement the method described in the second aspect or any one of the possible implementations of the second aspect.

Alternatively, the communication apparatus of the sixth aspect may be a network device, or may be a component (e.g. a chip or a circuit, etc.) for a network device. The other communication means may be a terminal device or may be a component (e.g. a chip or a circuit etc.) for a terminal device.

In a seventh aspect, a chip system is provided, the chip system comprising a processor for a terminal device to implement the functions involved in the first aspect or any one of the possible implementations of the first aspect, e.g. to receive, transmit, or process data and/or information involved in the method. In one possible design, the chip system further includes a memory for storing program instructions and data necessary for the terminal device. The chip system can be composed of chips, and can also comprise chips and other discrete devices.

In an eighth aspect, a system on a chip is provided, the system on a chip comprising a processor for a network device to implement the functionality involved in the second aspect or any one of the possible implementations of the second aspect, e.g. to receive, transmit, or process data and/or information involved in the method. In one possible design, the chip system further includes a memory for storing program instructions and data necessary for the terminal device. The chip system can be composed of chips, and can also comprise chips and other discrete devices.

In a ninth aspect, a computer readable storage medium is provided, in which a computer program or instructions is stored which, when executed, implement the method of the first aspect or any one of the possible implementations of the first aspect.

In a tenth aspect, a computer readable storage medium is provided, in which a computer program or instructions is stored which, when executed, implement the method of the second aspect or any one of the possible implementations of the second aspect.

In an eleventh aspect, there is provided a computer program product comprising: computer program code which, when run on a computer, causes the computer to perform the method of the first aspect or any one of the possible implementations of the first aspect.

In a twelfth aspect, there is provided a computer program product comprising: computer program code which, when run on a computer, causes the computer to perform the method of the second aspect or any of the possible implementations of the second aspect.

A thirteenth aspect provides a communication system comprising the terminal device described in the third aspect and the network device described in the fourth aspect; or the communication system includes the communication apparatus described in the fifth aspect and the communication apparatus described in the sixth aspect.

It should be appreciated that any of the above-mentioned communication devices, chip systems, computer-readable storage media or computer program products, etc. are used to perform the corresponding methods provided above, and thus, the advantages achieved by the above-mentioned communication devices, chip systems, computer-readable storage media or computer program products are referred to as advantages of the corresponding methods, and are not described herein.

Drawings

Fig. 1 is a schematic diagram of an application scenario according to the present application.

Fig. 2 is another schematic diagram of an application scenario to which the present application relates.

Fig. 3 is a schematic flow chart of a four-step contention random access procedure.

Fig. 4 is a schematic flow chart of a two-step contention random access procedure.

Fig. 5 is a schematic flow chart of a method of transmitting information.

Fig. 6 is a schematic flow chart of a method of transmitting information provided herein.

Fig. 7 is another schematic flow chart of a method of transmitting information provided herein.

Fig. 8 is another schematic flow chart of a method of transmitting information provided herein.

Fig. 9 is another schematic flow chart of a method of transmitting information provided herein.

Fig. 10 is another schematic flow chart of a method of transmitting information provided herein.

Fig. 11 is another schematic flow chart diagram of a method of transmitting information provided herein.

Fig. 12 is another schematic flow chart diagram of a method of transmitting information provided herein.

Fig. 13 is another schematic flow chart of a method of transmitting information provided herein.

Fig. 14 is another schematic flow chart diagram of a method of transmitting information provided herein.

Fig. 15 is another schematic flow chart of a method of transmitting information provided herein.

Fig. 16 is a schematic structural diagram of an apparatus for transmitting information provided in the present application.

Fig. 17 is a schematic structural diagram of another apparatus for transmitting information provided in the present application.

Fig. 18 is a schematic block diagram of a communication apparatus provided in the present application.

Fig. 19 is a schematic block diagram of another communication apparatus provided herein.

Detailed Description

The technical solutions in the embodiments of the present application will be described below with reference to the accompanying drawings.

In the present application, "at least one" means one or more, and "a plurality" means two or more. In addition, in the embodiments of the present application, "first", "second" and various numerical numbers are merely for convenience of description and are not intended to limit the scope of the embodiments of the present application. The following sequence numbers of the processes do not mean the sequence of execution, and the execution sequence of the processes should be determined by the functions and internal logic of the processes, and should not constitute any limitation on the implementation process of the embodiments of the present application. In addition, in the embodiment of the present application, words such as "701", "801", "901" and the like are merely marks made for convenience of description, and do not limit the order of executing steps.

In this application, "for indicating" may include for direct indication and for indirect indication. When describing that certain indication information is used for indicating A, the indication information may be included to directly indicate A or indirectly indicate A, and does not represent that the indication information is necessarily carried with A. In the embodiments of the present application, the descriptions of "when … …", "in the case of … …", "if" and "if" all refer to that the device will make corresponding processing under some objective condition, and are not limited in time, nor do the devices require that the device have to perform a judging action when implemented, nor are other limitations meant to exist.

In this application, the terms "exemplary" or "such as" are used to mean serving as an example, instance, or illustration. Any embodiment or design described herein as "exemplary" or "for example" should not be construed as preferred or advantageous over other embodiments or designs. Rather, the use of words such as "exemplary" or "such as" is intended to present related concepts in a concrete fashion.

The technical solution of the embodiment of the application can be applied to various communication systems, for example: global system for mobile communications (global system of mobile communication, GSM), code division multiple access (code division multiple access, CDMA), wideband code division multiple access (wideband code division multiple access, WCDMA) system, general packet radio service (general packet radio service, GPRS), long term evolution (long term evolution, LTE) system, LTE frequency division duplex (frequency division duplex, FDD) system, LTE time division duplex (time division duplex, TDD), universal mobile telecommunications system (universal mobile telecommunication system, UMTS), worldwide interoperability for microwave access (worldwide interoperability for microwave access, wiMAX) communication system, fifth generation (5th generation,5G) mobile communication system, or new radio access technology (NR), suitable for scenarios requiring channel information feedback, such as wireless networks employing large-scale array antenna (massive multiple-input multiple-output, M-MIMO) technology, wireless networks employing distributed antenna technology, and the like. The technical scheme provided by the application can also be applied to future communication systems, such as a sixth generation mobile communication system.

The terminal device may be a device providing voice/data connectivity to a user, e.g., a handheld device having a wireless connection function, a vehicle-mounted device, etc.; devices in the communication of the internet of vehicles, such as communication terminals uploaded by vehicles, road Side Units (RSUs); the communication terminal can be carried on the unmanned plane; but also end devices in internet of things (internet of things, ioT) systems. A terminal device may also be called a User Equipment (UE), an access terminal, a subscriber unit, a subscriber station, a mobile station, a remote terminal, a mobile device, a user terminal, a wireless communication device, a user agent, a user device, or the like.

Exemplary terminal devices include, but are not limited to: a mobile phone, tablet, laptop, palmtop, mobile internet device (mobile internet device, MID), wearable device, virtual Reality (VR) device, augmented reality (augmented reality, AR) device, wireless terminal in industrial control (industrial control), wireless terminal in unmanned (self driving), wireless terminal in teleoperation (remote medical surgery), wireless terminal in smart grid (smart grid), wireless terminal in transportation security (transportation safety), wireless terminal in smart city (smart city), wireless terminal in smart home (smart home), cellular phone, cordless phone, session initiation protocol (session initiation protocol, SIP) phone, wireless local loop (wireless local loop, WLL) station, personal digital assistant (personal digital assistant, PDA), handheld device with wireless communication function, computing device or other processing device connected to wireless modem, wearable device, terminal device in 5G network or terminal in future evolved land mobile communication network (public land mobile network), and the like, without limiting the present application.

It should be understood that the network device may be a device capable of accessing the terminal device to a wireless network. The network device may also be referred to as a radio access network (radio access network, RAN) node, a radio access network device, an access network device. The network device may be a base station, for example.

The base station in the embodiment of the present application may cover various names in the following in a broad sense, or may be replaced with the following names, for example: a node B (NodeB), an evolved NodeB (eNB), a next generation NodeB (gNB), a relay station, a master eNodeB (MeNB), a secondary eNodeB (SeNB), a multi-system radio (multi standard radio, MSR) node, a home base station, a network controller, an access node, a radio node, an Access Point (AP), a transmission node, a transceiver node, a Central Unit (CU), a Distributed Unit (DU), a positioning node, and the like. The base station may be a macro base station, a micro base station, a relay node, a donor node, or the like, or a combination thereof. A base station may also refer to a communication module, modem, or chip for placement within the aforementioned device or apparatus. The base station may also be a network side device in a 6G network, a device that assumes the function of a base station in a future communication system, or the like. The base stations may support networks of the same or different access technologies. The embodiments of the present application are not limited to the specific technology and specific device configuration employed by the network device.

The base station may be fixed or mobile. For example, a helicopter or drone may be configured to act as a mobile base station, and one or more cells may move according to the location of the mobile base station. In other examples, a helicopter or drone may be configured to function as a device to communicate with another base station.

In some deployments, a network device may refer to a CU or a DU, or the network device includes a CU and a DU. The gNB may also include an active antenna unit (active antenna unit, AAU). The CU implements part of the functionality of the gNB and the DU implements part of the functionality of the gNB, e.g. the CU is responsible for handling non-real time protocols and services, implementing radio resource control (radio resource control, RRC), packet data convergence layer protocol (packet data convergence protocol, PDCP) layer functions. The DUs are responsible for handling physical layer protocols and real-time services, implementing the functions of the radio link control (radio link control, RLC), medium access control (medium access control, MAC) and Physical (PHY) layers. The AAU realizes part of physical layer processing function, radio frequency processing and related functions of the active antenna. Since the information of the RRC layer may eventually become information of the PHY layer or be converted from the information of the PHY layer, under this architecture, higher layer signaling, such as RRC layer signaling, may also be considered to be transmitted by the DU or by the du+aau. Furthermore, the CUs may be divided into network devices in an access network (radio access network, RAN), or into network devices in a Core Network (CN).

For the sake of understanding the embodiments of the present application, first, application scenarios applicable to the present application will be described in detail with reference to fig. 1 and 2.

Fig. 1 is a schematic diagram of an application scenario 100 according to the present application. As shown in fig. 1, the application scenario 100 may include a plurality of transmission and reception points (transmission reception point, TRP), such as TRP110, TRP 120, TRP 130, and TRP 140 shown in fig. 1, on which a network device (not shown) may transmit downlink data. The application scenario 100 further comprises at least one terminal device, such as the terminal device 150 shown in fig. 1.

Fig. 1 shows an application scenario of the present application, which is mainly applied to a scenario in which a terminal device moves fast, for example, a high-speed rail scenario. As shown in fig. 1, TRPs are distributed at a certain density on both sides of a railway, terminal equipment 150 moves at a high speed, and network equipment can transmit downlink data on a plurality of TRPs. The network device may transmit information in a transmission mode of a single frequency network (single frequency network, SFN), where the SFN transmission mode refers to: the network device sends the same downlink data to the terminal device on a plurality of TRPs according to the same configuration information so as to realize reliable coverage of the specific service area. For example, the network device may send the same information (or broadcast the same information) to terminal device 150 on the same time-frequency resource with the same configuration information on TRP110, TRP 120, TRP 130, and TRP 140. Because the channel conditions between TRP110, TRP 120, TRP 130, TRP 140 and terminal device 150 are different, when the network device adopts SFN transmission mode, frequent network switching of the terminal device can be avoided, and the terminal device can accurately receive the information sent by the network device. In addition, the terminal equipment can acquire diversity gain, improve the reliability of information receiving, save resources and improve the frequency spectrum utilization rate. Therefore, SFN is a typical network deployment method in the current high-speed rail scenario.

However, not all network devices are suitable for the SFN transmission method to transmit information, so there are other non-SFN transmission methods besides the SFN transmission method, and the non-SFN transmission method may include the following two cases.

As shown in fig. 1, when the network device performs information transmission in a non-SFN transmission manner, the network device sends downlink data to the terminal device on multiple TRPs with different configuration information. For example, the network device may send information to terminal device 150 (or broadcast information to terminal device 150, respectively) with different configuration information on TRP 110, TRP 120, TRP 130, and TRP 140, respectively. In this case, the terminal device 150 can receive information transmitted by different TRPs according to different configuration information, respectively.

As shown in fig. 2, fig. 2 is a schematic diagram of an application scenario 200 related to the present application. Similar to the application scenario 100, the application scenario 200 may include a plurality of TRPs, such as TRP 210, TRP 220, TRP 230, and TRP240 shown in fig. 2. The application scenario 200 further comprises at least one terminal device, such as the terminal device 250 shown in fig. 2. In the scenario shown in fig. 2, when the network device performs information transmission in a non-SFN transmission manner, the network device sends downlink data to the terminal device on a certain TRP with the same configuration information. Alternatively, the network device may determine to send downlink data to the terminal device on TRP 220 based on the reference signal information measured and reported by terminal device 250. For example, the network device may select the TRP with the largest RSRP to transmit the downlink data according to the reference signal received power (reference signal received power, RSRP) measured and reported by the terminal device.

It should be understood that the numbers of TRPs and terminal devices shown in fig. 1 and 2 are merely exemplary, and that more TRPs and terminal devices may be included in application scenarios 100 and 200.

It should be noted that, in the embodiment of the present application, the network device may be a baseband unit (BBU), a remote radio unit (remote radio unit, RRU), or a device including a BBU and an RRU. TRP refers to the location where RRU is placed or may be understood as the location where RRU and antenna are placed, where RRU and antenna may be understood as AAU. That is, the network device may transmit downlink data to the terminal device on the plurality of TRPs.

In order to facilitate understanding of the embodiments of the present application, a few terms referred to in the present application will first be briefly described below.

QCL relationship: may be used to indicate that two reference signals or that a reference signal has the same or similar spatial characteristics parameters as the channel. Wherein the spatial characteristic parameter may include one or more of: delay spread (delay spread), doppler spread (doppler spread), doppler shift (doppler shift), average delay (average delay), average gain, spatial reception parameters (spatial Rx parameters).

The network device may simultaneously configure the terminal device with one or more types of QCL, and in the NR protocol, the QCL relationship may be classified into the following four types based on different spatial characteristic parameters:

type a (Type a): doppler shift, doppler spread, average delay, delay spread;

type B (Type B): doppler shift, doppler spread;

type C (Type C): doppler shift, average delay;

type D (Type D): the parameters are received spatially.

Transmission configuration indication (transmission configuration indicator, TCI): may be used to indicate the QCL relationship between the two reference signals. The network device may configure a TCI state (TCI state) list for the terminal device through higher layer signaling (e.g., radio resource control (radio resource control, RRC) messages) and may activate or indicate one or more of the TCI states through higher layer signaling (e.g., MAC CE) or physical layer signaling (e.g., downlink control information (downlink control information, DCI)). Specifically, the network device may configure a TCI status list for the terminal device through an RRC message, and when the terminal device receives the PDCCH from the network device, the terminal device may activate one or more of the control channel TCI status lists according to the indication of the MAC CE, where the control channel TCI status list is a subset of the TCI status list; the terminal device may obtain DCI from the PDCCH, and further select one or more TCI states in a data channel TCI state list according to the indication of the DCI, where the data channel TCI state list is a subset of the TCI state list, and indicates the data channel TCI state list to the terminal device through MAC-CE signaling.

The configuration information for one TCI state may include an identification of one or both reference signal resources, and an associated QCL type. When the QCL relationship is configured as one of the types a, B, or C, the terminal device may demodulate the PDCCH or PDSCH according to the indication of the TCI state. When the QCL relationship is configured as type D, the terminal device may know which transmit beam the network device uses to transmit signals, and may then determine which receive beam to use to receive signals based on the beam pairing relationship determined by the channel measurements.

SSB: the SSB includes a synchronization signal and a physical broadcast information channel (physical broadcast channel, PBCH) block, wherein the synchronization signal includes a primary synchronization signal (primary synchronization signals, PSS) and a secondary synchronization signal (secondary synchronization signals, SSS). PSS and SSS may be used for timing synchronization and carrier frequency synchronization; the PBCH block is used to carry a master information block (master information block, MIB) containing configuration information for the PDCCH of scheduling system message block 1 (system information block, sib1).

SIB1: the 5G NR system information includes a master information block MIB and various system message blocks SIB, the system message blocks being dynamically transmitted by a downlink shared channel and a physical downlink shared channel. SIB1 contains relevant information that evaluates whether a terminal device is allowed to access a cell and defines scheduling of other system messages (e.g., SIB2, SIB3, etc.). SIB1 contains both radio resource configuration information common to all terminal devices and information for prohibiting application to unified access control.

It should be noted that some names and english are abbreviated as descriptions of embodiments of the present application using an LTE system or a 5G system as an example, but embodiments of the present application are not limited thereto, and may change with evolution of a network, and specific evolution may refer to descriptions in corresponding standards.

In order to achieve uplink synchronization between the terminal device and the network device, uplink transmission of the terminal device is achieved, and the contention random access procedure is an indispensable procedure when the terminal device is initially accessed to the network device. Random access can be classified into two types, namely contention-based random access (CBRA) and non-contention random access (content-free random access, CFRA). The contention-based random access procedure is mainly divided into four steps, i.e., four steps of contention-based random access, and the specific procedure is shown in fig. 3, and the method 300 may include steps S310 to S340.

S310, the terminal device sends a random access preamble (preamble) to the network device.

Since the message transmitted in this step is the first message transmitted in the contention-based random access procedure, it may be referred to as message1 (Msg 1).

The terminal device randomly selects one of the available random access preambles and transmits Msg1 over the random access channel (random access channel, RACH) with progressively increasing power until the network device detects the preamble.

Included in Msg1 is a random access radio network temporary identity (random access radio network tempory identity, RA-RNTI), which may be determined from a subframe index in which the terminal device transmits a preamble.

The network device sends a random access response RAR to the terminal device S320.

Since the message transmitted in this step is the second message transmitted in the contention-based random access procedure, it may be called message2 (Msg 2).

When the network device detects the random access preamble sent by the terminal device, RAR is sent to the terminal device through PDSCH. The RAR includes, but is not limited to, the following: an index number (preamble ID) of the detected random access preamble, a Timing Advance (TA) for uplink synchronization, an uplink grant signaling (UL grant), and a temporary radio network identity (temporary cell radio network tempory identity, TC-RNTI) allocated by the network device.

The PDCCH carrying the Msg2 scheduling message is scrambled by an RA-RNTI, and the RA-RNTI uniquely corresponds to a time-frequency resource for transmitting the Msg1 in a window with a certain duration. The terminal equipment determines that the Msg2 corresponds to the Msg1 sent by the terminal equipment through the RA-RNTI and the preamble ID carried in the Msg 2.

S330, the terminal device sends a connection request message to the network device.

Since the message transmitted in this step is the third message transmitted in the contention-based random access procedure, it may be called message3 (Msg 3).

After receiving the RAR message sent by the network device, the terminal device obtains uplink time synchronization and uplink resources, and sends a connection request message carrying a terminal device identifier (UE ID) to the network device on an UL grant specified by Msg2 based on a physical uplink shared channel (physical uplink shared channel, PUSCH) carried in the RAR. It should be appreciated that the content of the uplink transmission of the Msg3 is different for different random access reasons, for example for initial access, msg3 transmits an RRC connection establishment request.

But at this point the terminal device cannot determine whether the RAR message is sent to itself and not to other terminal devices. Since the random access preamble of the terminal device is randomly selected from the common resource, there may be a case where different terminal devices transmit the same random access preamble on the same time-frequency resource, and thus the terminal devices receive the same RAR through the same RA-RNTI. Moreover, the terminal device itself does not know from the past whether other terminal devices use the same resources for random access. For this purpose the terminal device needs to resolve such random access collisions by means of messages 3 and 4.

In this step, the initial transmission of the Msg3 is scheduled by the uplink grant UL grant field in the RAR, and if the network device fails to receive the Msg3, the network device instructs the terminal device to retransmit the Msg3 by using a hybrid automatic repeat request (hybrid automatic repeat request, HARQ) mechanism, and retransmits the PDCCH scheduled transmission scrambled by the TC-RNTI.

And S340, the network device sends a competition resolving message to the terminal device.

Since the message transmitted in this step is the fourth message transmitted in the contention-based random access procedure, it may be called message4 (Msg 4).

In this step, the initial transmission of Msg4 is a PDCCH scheduled transmission scrambled by TC-RNTI.

If the terminal equipment receives the contention resolution message (Msg 4) returned by the network equipment within the preset time range, and determines that the terminal equipment identifier carried in the contention resolution message is the same as the terminal equipment identifier reported to the network equipment by the terminal equipment, the terminal equipment determines that the random access is successful, and automatically converts the TC-RNTI obtained in the RAR message into the unique identifier C-RNTI of the terminal equipment. If the terminal equipment does not receive the competition resolving message returned by the network equipment within the preset time range, determining that the random access fails, and triggering the competition-based random access process again.

For contention-based random access, in order to shorten random access delay, in addition to four-step contention-based random access, two-step contention-based random access is supported in the 5G system. The two-step random access based on contention is illustrated in fig. 4, and the method 400 may include steps S410 to S420.

S410, the terminal device sends a random access preamble and a connection request (MsgA) to the network device.

The terminal device randomly selects a random access preamble from the set of available preamble sequences and transmits an MsgA message on the RACH with progressively higher power until the preamble is detected by the network setup.

In this step, the initial transmission of the message carried on PUSCH in MsgA is scheduled for transmission by the configuration information broadcast by the system message.

The MsgA message carries at least a random access preamble and a data portion. The data portion includes, but is not limited to, the following: terminal equipment identification, scheduling request, buffer status report and real service data. Wherein the MsgA message may include information included in Msg1 and Msg3 in the contention-based four-step random access. The random access preamble and the terminal device identifier are simultaneously sent to the network device in the contention-based two-step random access MsgA message, and the network device can directly determine whether to establish communication with the terminal device.

S420, the network device sends an MsgB message to the terminal device.

When the network device receives the MsgA message, the network device detects the random access preamble and decodes the PUSCH according to the random access preamble and the data portion carried in the MsgA message.

If the random access preamble and the data portion in the MsgA message are both successfully received by the network device, the network device can successfully detect the preamble and decode the PUSCH, and the network device may send the MsgB message to the terminal device. The MsgB message includes a transmission on PDCCH and a message sent on PDSCH including but not limited to: an indication of acknowledgement PRACH preamble, timing advance, back-off indicator, contention resolution message, transmit power control command, and uplink or downlink resource grant. It is understood that the MsgB message includes information included in RAR and Msg4 in the contention-based four-step random access. In this case, the initial transmission of the MsgB containing a successful RAR is a PDCCH scheduled transmission scrambled by the C-RNTI. If the terminal equipment fails to receive the MsgB, the terminal equipment feeds back negative acknowledgement NACK to the network equipment, and the network equipment instructs the terminal equipment to retransmit the MsgB by adopting an HARQ mechanism and retransmit the PDCCH command scheduling scrambled by the C-RNTI.

If the random access preamble and the data part in the MsgA message are not successfully received by the network device, the network device cannot detect the preamble and decode the PUSCH, and the terminal device cannot receive the MsgB message before the MsgB message receiving window or the timer corresponding to the MsgB expires, and the terminal device continues to attempt two-step contention-based random access.

If only the random access preamble is successfully received by the network device in the MsgA message, the data portion is not successfully received by the network device, and the network device can detect the random access preamble but cannot correctly decode the PUSCH, the terminal device receives the RAR corresponding to the four-step random access based on contention returned by the network device before the MsgB message receiving window or the timer corresponding to the MsgB expires, and converts the RAR into the four-step random access based on contention. In this case, the initial transmission of the MsgB containing the fallback RAR is a PDCCH scheduled transmission scrambled by the MsgB-RNTI.

When the terminal device establishes a connection with the network device through the contention-based random access, the terminal device may receive a message (e.g., RAR, msg4, etc.) in the random access procedure according to the QCL relationship between the synchronization signal broadcast channel block SSB and the message in the random access procedure.

As shown in fig. 5, fig. 5 shows a schematic flow chart of a method of transmitting information, and the method 500 may be performed interactively by a network device and a terminal device, and may specifically include steps S501 to S509.

S501, the network device broadcasts and transmits SSB. Accordingly, the terminal device receives the SSB.

In particular, the network device may transmit an SSB to the terminal device on a plurality of TRPs, which may be considered to belong to the same cell, the SSB being transmitted periodically broadcast. That is, the network device may periodically broadcast a transmission SSB to the terminal device on each of the plurality of TRPs.

It should be appreciated that the network device may transmit SSBs in an SFN transmission manner, or may transmit SSBs in a non-SFN transmission manner.

Alternatively, when the network device transmits the SSB in the SFN transmission mode, the SSB index transmitted by the network device on each of the plurality of TRPs is the same, i.e. the network device transmits the SSB on the same time-frequency resource, that is, the terminal device can only receive the same SSB transmitted by the network device on different TRPs.

Alternatively, when the network device transmits SSBs in a non-SFN transmission, the network device may transmit SSB indexes on each of the plurality of TRPs separately, that is, the terminal device may receive different SSBs transmitted by the network device on different TRPs.

S502, the terminal equipment measures SSB and selects a preamble according to the measurement result.

The terminal device receives and measures the SSB sent by the network device, and can obtain information such as reference signal received power (reference signal received power, RSRP), reference signal received quality (reference signal received quality, RSRQ), signal-to-interference-and-noise ratio (signal to interference noise ratio, SINR, signal-to-interference-and-noise ratio for short), and according to these measurement results, the terminal device can select one preamble from all preambles used for contention random access.

As an example, when the terminal device receives the same SSB, that is, the network device transmits the SSB in an SFN transmission manner, the terminal device measures the received SSB to obtain information such as RSRP, RSRQ, and SINR of the SSB. The terminal device may randomly select one preamble from all preambles for contention random access based on these measurements.

As another example, when the terminal device receives a different plurality of SSBs, that is, the network device transmits the SSBs in a non-SFN transmission manner, the terminal device may determine the target SSB from the plurality of SSBs based on a preset rule according to the SSB measurement result by measuring the received plurality of SSBs. For example, the terminal device may determine the target SSB according to the average RSRP, the average RSRQ, and the average SINR of the different SSBs received in the preset range. Optionally, the terminal device may determine that the average RSRP of the different SSBs is the largest as the target SSB, or determine that the average RSRQ of the different SSBs is the largest as the target SSB, or determine that the average SINR of the different SSBs is the largest as the target SSB. After the terminal device determines the target SSB, the preamble corresponding to the target SSB may be selected from all preambles used for contention random access.

It should be noted that, there is a correspondence between SSB and preamble, and the correspondence between SSB and preamble may be one-to-one, one-to-many, or many-to-one. The terminal device may determine its corresponding preamble from the selected target SSB. Correspondingly, the network device may also indirectly determine the target SSB selected by the terminal device and the target TRP for transmitting the target SSB according to the preamble transmitted by the terminal device.

S503, the terminal device sends the random access preamble to the network device.

It will be appreciated that the terminal device transmits the terminal device selected preamble to the network device over the random access channel RACH. In this step, the terminal device transmits a preamble to the network device with gradually increasing power until the network device detects the preamble.

For other contents of this step, reference may be made to step S310, and for brevity, will not be described here again.

After the network device receives the random access preamble transmitted by the terminal device, the network device may transmit downlink data on one or more TRPs. That is, the network device may transmit downlink data in an SFN transmission mode or in a non-SFN transmission mode.

Alternatively, when the network device transmits downlink data in an SFN transmission manner, the network device may transmit the same downlink data to the terminal device on a plurality of TRPs.

Optionally, when the network device transmits the downlink data in a non-SFN transmission manner, the network device may determine to transmit the downlink data to the terminal device on a TRP of the plurality of TRPs, that is, the method 500 may further include step S504, where the network device determines the target TRP.

In step S504, the network device may determine a target TRP from among the plurality of TRPs according to a preset rule. Wherein the target TRP is one of a plurality of TRPs, and the network device can send downlink data to the terminal device on the target TRP. Alternatively, the downlink data may be a message in the access procedure, for example, RAR, message 4, or message B.

For example, the network device may measure the average RSRP, the average RSRQ, and the average SINR of the preambles transmitted by the terminal devices received on different TRPs within a preset range to determine the target TRP.

For example, the network device may determine the TRP with the largest average RSRP of the preambles received on the different TRPs as the target TRP, or the network device may determine the TRP with the largest average RSRQ of the preambles received on the different TRPs as the target TRP, or the network device may determine the TRP with the largest average SINR of the preambles received on the different TRPs as the target TRP.

It should be appreciated that in practical applications, the target TRP may also be determined based on other rules, which are not described in detail herein.

S505, the network device sends a random access response RAR to the terminal device.

In this step, when the network device detects the random access preamble transmitted by the terminal device, the PDCCH and its scheduled RAR are transmitted to the terminal device through the PDSCH. The RAR includes, but is not limited to, the following: an index number of the detected random access preamble, a timing advance TA for uplink synchronization, an uplink grant signaling UL grant, and a temporary radio network identifier TC-RNTI allocated by the network device.

It should be appreciated that the network device may transmit the PDCCH and its scheduled RAR to the terminal device in an SFN transmission, in which case the terminal device is able to receive the same RAR transmitted by the network device on different TRPs.

It should also be understood that the network device may send the PDCCH and its scheduled RAR to the terminal device in a non-SFN transmission manner, i.e., the network device may send the PDCCH and its scheduled RAR to the terminal device on the target TRP. In this case, the terminal device is able to receive the RAR sent by the network device on the target TRP.

For other contents, reference may be made to step S320, and for brevity, details are not repeated here.

S506, the terminal equipment receives the RAR according to the QCL relation between the RAR and the SSB.

Specifically, after the terminal device transmits the random access preamble, the PDCCH is detected within the RAR time window to receive the RAR corresponding to the RA-RNTI. If the RAR replied by the network equipment is not received in the RAR time window, the random access procedure is considered to be failed.

It should be understood that the QCL relationship is specified according to the current protocol, and that there are Type a and Type D in the QCL relationship, i.e., all QCL attributes, between the RAR and the PDCCH and SSB that schedule the RAR. Therefore, the terminal device may determine, according to the received SSB, the parameter information such as beam, delay, doppler, etc. of the RAR sent by the network device, so that the same or similar spatial characteristic parameters may be used to receive the RAR.

S507, the terminal device sends a connection request message Msg3 to the network device.

Specifically, after receiving an RAR message sent by a network device, a terminal device obtains uplink time synchronization and uplink resources, and sends a connection request message Msg3 carrying a terminal device identifier to the network device according to an UL grant carried in the RAR based on a PUSCH carried in the RAR.

It should be appreciated that the content of the uplink transmission of the Msg3 is different for different random access reasons, for example for initial access, msg3 transmits an RRC connection establishment request.

Other contents of this step may refer to S330, and will not be described here.

S508, the network device sends a contention resolution message Msg4 to the terminal device.

It should be understood that when the network device receives the Msg3 carrying the terminal identifier sent by the terminal device, a contention resolution message Msg4 is sent to the terminal device.

The specific process of this step may refer to S340, and for brevity, will not be described herein.

It should be noted that, the network device may transmit the PDCCH and its scheduled Msg4 to the terminal device in the SFN transmission manner, in which case, the terminal device may receive the same Msg4 transmitted by the network device on different TRPs. The network device may also send the PDCCH and its scheduled Msg4 to the terminal device in a non-SFN transmission manner, i.e. the network device may send the PDCCH and its scheduled Msg4 to the terminal device on the target TRP. In this case, the terminal device is able to receive the Msg4 sent by the network device on the target TRP.

S509, the terminal equipment receives the Msg4 according to the QCL relation between the Msg4 and the SSB.

Specifically, after the terminal device sends Msg3, the PDCCH is detected in a preset time range and the scheduled Msg4 is received. If the terminal equipment receives the Msg4 returned by the network equipment within a preset time range, and determines that the terminal equipment identifier carried in the Msg4 is the same as the terminal equipment identifier reported to the network equipment by the terminal equipment, the terminal equipment judges that the random access is successful, and automatically converts the TC-RNTI obtained in the RAR message into a unique identifier C-RNTI of the terminal equipment. If the terminal equipment does not receive the competition resolving message returned by the network equipment within the preset time range, the random access process is considered to be failed.

It should be understood that the QCL relationship is specified according to the current protocol, and that there are Type a and Type D in the QCL relationship, i.e., all QCL attributes, between Msg4 and PDCCH and SSB scheduling Msg4. Thus, the terminal device may determine, according to the received SSB, that the network device transmits the parameter information of beam, delay, doppler, etc. of Msg4, so that the same or similar spatial characteristic parameters may be used to receive Msg4.

The terminal device may assume a QCL relationship between RAR and SSB and/or between Msg4 and SSB. On the one hand, since not all network devices can support SFN transmission, the following situations may occur: the SSB is transmitted in an SFN transmission mode, and the RAR, the Msg4 and the MsgB are transmitted in a non-SFN mode, or the SSB is transmitted in a non-SFN transmission mode, and the RAR, the Msg4 and the MsgB are transmitted in an SFN mode. Namely, when the transmission modes of the SSB and the RAR and/or the Msg4 and the SSB and the Msg are different, the terminal equipment cannot acquire the accurate QCL relation. On the other hand, even though the network device can transmit SSB, RAR, msg or MsgB using the same transmission scheme, in a high frequency scenario, the beam corresponding to SSB is wider, so even if the network device uses the same transmission scheme for transmission, the terminal device may not be able to acquire the precise QCL relationship. That is, the terminal device cannot obtain accurate RAR and/or Msg4 or the channel condition of MsgB according to SSB. Therefore, both cases may result in poor reception performance of RAR and/or Msg4, or MsgB, resulting in low random access success rate.

In the embodiment of the application, the terminal equipment receives the configuration information of the reference signal broadcast and sent by the network equipment, and receives the reference signal on the configuration information corresponding to the reference signal. Thus, the terminal equipment can accurately measure the channel condition corresponding to the reference signal according to the received reference signal, and further obtain more accurate channel conditions of RAR and/or Msg4 and Msg B according to the QCL relation between the reference signal and the RAR and/or Msg4 and Msg B, thereby improving the receiving performance of the RAR and/or Msg4 and Msg B and improving the success rate of random access. Meanwhile, the success rate of receiving the message before the first time of receiving the special reference signal configuration information of the terminal equipment after the random access can be further improved.

Fig. 6 shows a schematic flow chart of a method 600 for transmitting information provided by an embodiment of the present application. The embodiment is applicable to a four-step random access procedure based on contention or a two-step random access procedure based on contention. The method 600 shown in fig. 6 may be interactively performed by a network device and a terminal device, and may specifically include steps S601 to S604.

S601, the network device transmits configuration information of at least one reference signal. Accordingly, the terminal device receives configuration information of at least one reference signal.

The network device may send configuration information of a reference signal to the terminal device on the plurality of TRPs, the configuration information of the reference signal comprising configuration information of at least one reference signal. Correspondingly, the terminal device may receive configuration information of at least one reference signal transmitted by the network device on the plurality of TRPs, the configuration information of the at least one reference signal including configuration information of the first reference signal.

It is understood that the configuration information of the at least one reference signal received by the terminal device may be sent by the network device on one TRP of the plurality of TRPs, may be sent by the network device on a part of TRPs of the plurality of TRPs, or may be sent by the network device on the plurality of TRPs, which is not limited in this application. That is, the network device may transmit configuration information of all reference signals within the coverage area of the network device on one TRP.

It is understood that the configuration information of the at least one reference signal may be transmitted through broadcasting in SIB 1. That is, the configuration information of the at least one reference signal may be the same cell configuration information transmitted by the network device for all terminal devices to receive.

In other words, the configuration information of the reference signal carried in the SIB1 broadcast and sent by the network device on different TRPs is the same, and the configuration information of the reference signal may include configuration information of one reference signal or configuration information of a plurality of reference signals.

When a network device broadcasts configuration information for transmitting one reference signal on different TRPs, the network device may transmit the reference signal using the configuration information for the same reference signal on all TRPs. Correspondingly, the terminal device also receives the reference signal based on the same reference signal configuration information.

When a network device broadcasts configuration information for transmitting a plurality of reference signals on different TRPs, the network device may transmit the reference signals on the different TRPs using the configuration information for the corresponding reference signals. Correspondingly, the terminal equipment also receives the corresponding reference signal in the corresponding reference signal configuration information.

Alternatively, the reference signal may be CSI-RS, TRS, or other reference signals capable of channel estimation, which is not limited in this application.

Optionally, before the network device sends the configuration information of the at least one reference signal to the terminal device, the method 600 may further include:

The network equipment broadcasts and sends SSB (service instance B) to the terminal equipment, the SSB carries the configuration information of SIB1, the terminal equipment determines the configuration information of SIB1 according to the SSB sent by the network equipment, and receives SIB1 according to the configuration information of SIB1, and the SIB1 can carry the configuration information of at least one reference signal.

S602, the network device transmits a first reference signal. Accordingly, the terminal device receives the first reference signal.

The network device transmits a first reference signal to the terminal device on a first TRP of the plurality of TRPs, and accordingly, the terminal device may receive the first reference signal transmitted by the network device based on configuration information of the first reference signal. Wherein the first TRP may be any one of a plurality of TRPs, and the first reference signal is a reference signal transmitted by the network device on the first TRP.

It is to be appreciated that the configuration information of the first reference signal can be transmitted by the network device on a plurality of TRPs, the first reference signal being transmitted by the network device on the first TRP.

S603, the network device sends a first message to the terminal device.

The network device may send a first message to the terminal device on a first TRP of the plurality of TRPs. It should be appreciated that the first reference signal and the first message transmitted by the network device are both transmitted through the first TRP.

Alternatively, the first message may be for random access. For example, the first message may be a message carried on the PDSCH for random access, for example, the first message may be an RAR, msg4, or MsgB in a random access procedure, or the first message may also be a PDCCH for scheduling the PDSCH (on which the RAR, msg4, or MsgB may be carried).

Optionally, the first message may be a message before the first receiving of the terminal device-specific reference signal configuration information after the random access, where the message is carried on the PDSCH or on the PDCCH for scheduling the PDSCH. That is, the first message may be a message carried on the PDSCH in a stage before the first reception of the terminal device-specific reference signal configuration information after the random access or a PDCCH scheduling the PDSCH.

The terminal device receives the first message based on the first transmission relation indicating that the first reference signal has the same or similar spatial characteristic parameters as the first message S604.

The terminal device receives the first message based on a first transmission relation, which may be the QCL relation described above, that is, the first reference signal and the first message have the same or similar spatial characteristic parameters, where the spatial characteristic parameters include, but are not limited to, the following: doppler shift, doppler spread, average delay, delay spread, average gain, and spatial reception parameters.

That is, the terminal device may receive the first message using the same or similar spatial characteristic parameter as the first reference signal, and it may be understood that the first reference signal has a QCL relationship with the first message.

Since in the current protocol the first transmission relation between the reference signal and the first message is not defined, the first transmission relation between the reference signal and the first message may be predefined in the protocol, for example, type a and Type D, i.e. the properties of the total QCL, in the QCL relation between the reference signal and the first message may be predefined in the protocol.

In this embodiment, the terminal device may receive the first message by using the spatial characteristic parameter same as or similar to the first reference signal, so as to ensure that the terminal device can more accurately receive the first message based on the first transmission relationship, thereby improving the receiving performance of the first message and improving the success rate of accessing the first message. Meanwhile, by utilizing the method provided by the embodiment, the terminal equipment can also more accurately receive the message before the special reference signal configuration information of the terminal equipment is received for the first time after random access, so that different first message receiving success rates are improved.

Fig. 7 shows a schematic flow chart of a method 700 for transmitting information provided in an embodiment of the present application. The embodiment is applicable to a four-step random access procedure based on contention or a two-step random access procedure based on contention. The method 700 shown in fig. 7 may be interactively performed by a network device and a terminal device, and may specifically include steps S701 to S706.

S701, the network device transmits configuration information of a plurality of reference signals. Accordingly, the terminal device receives configuration information of the plurality of reference signals.

This step may refer to step S601, and will not be described here again for brevity.

S702, the network device determines a first reference signal.

In this step, the network device first determines on which TRP the first reference signal is transmitted, and then can determine on which TRP the first reference signal is transmitted by the correspondence between TRP and reference signal. For example, the network device may determine to transmit the first reference signal on the first TRP.

Optionally, the method 700 may further include, prior to the network device determining to transmit the first reference signal on the first TRP:

the first request message sent by the terminal device is received, and the first request message may be, for example, the random access preamble Msg1 in S310. It should be appreciated that the network device may measure a signal parameter of a first request message received on a different TRP from the first request message for a preset time and determine the first TRP based on the signal parameter. Wherein the signal parameters include, but are not limited to, the following: RSRP, RSRQ, SINR. For example, the network device may determine that the TRP having the largest average RSRP of the first request message received on the different TRP within the preset time is the first TRP, or the network device may determine that the TRP having the largest average RSRQ of the first request message received on the different TRP within the preset time is the first TRP, or the network device may determine that the TRP having the largest average SINR of the first request message received on the different TRP within the preset time is the first TRP.

Optionally, the network device may also determine the first TRP from first request messages (e.g. random access preambles) sent by other terminal devices in the cell received on different TRPs over a period of time in the past. For example, the network device determines the first TRP by means of the average RSRP, the average RSRQ and the average SINR of the random access preambles transmitted by other terminal devices in the cell. That is, the network device may determine the TRP with the largest average RSRP of the random access preamble as the first TRP, or the network device may determine the TRP with the largest average RSRQ of the random access preamble as the first TRP, or the network device may determine the TRP with the largest average SINR of the random access preamble as the first TRP.

S703, the network device sends the first indication information. Accordingly, the terminal device receives the first indication information.

After the network device performs S702 to determine the first reference signal, the network device may send first indication information to the terminal device on the first TRP, where the first indication information is used to indicate the identification of the first reference signal.

Optionally, the first indication information is carried by an RAR in the four-step random access based on contention, a message 4 in the four-step random access based on contention, a message B in the two-step random access based on contention, a PDCCH for scheduling the RAR, a PDCCH for scheduling the message 4, a PDCCH for scheduling the message B, or a PDCCH for scheduling the retransmission message 3, which is not limited in this application.

As an example, the first indication information received by the terminal device may be carried on the RAR or on a PDCCH scheduling the RAR.

In this example, an additional field, e.g., a 1-bit field, may be included in the RAR or PDCCH scheduling the RAR to indicate the identity of the first reference signal. Thus, when the terminal equipment receives the RAR sent by the network equipment, the first reference signal can be determined from the plurality of reference signals through the identifier of the first reference signal carried in the RAR or the PDCCH for scheduling the RAR. In this way, the terminal device may receive the first message using the first transmission relationship between the first reference signal and the first message, where the first message may be a message before the terminal device receives the reference signal configuration information specific to the terminal device for the first time after receiving the RAR.

As an example, the first indication information received by the terminal device may be carried on the PDCCH scheduling the retransmission message 3.

In this example, an additional field, for example, a 1-bit field, may be included in the PDCCH of the scheduled retransmission message 3 for indicating the identity of the first reference signal. Thus, when receiving the retransmission message 3 sent by the network device, the terminal device can determine the first reference signal from the multiple reference signals by scheduling the identifier of the first reference signal carried in the PDCCH of the retransmission message 3. In this way, the terminal device may receive the first message using the first transmission relationship between the first reference signal and the first message, where the first message may be a message before the terminal device receives the reference signal configuration information specific to the terminal device for the first time after receiving the PDCCH of the scheduled retransmission message 3.

As an example, the first indication information received by the terminal device may be carried on message 4 or on the PDCCH of scheduling message 4.

In this example, an additional field, e.g., a 1-bit field, is included in the PDCCH of the message 4 or scheduling message 4 for indicating the identity of the first reference signal. Thus, when the terminal device receives the message 4 or the PDCCH of the scheduling message 4 sent by the network device, the first reference signal can be determined from the plurality of reference signals through the identification of the first reference signal carried in the message 4 or the PDCCH of the scheduling message 4. In this way, the terminal device may receive the first message using the first transmission relationship between the first reference signal and the first message. The first message may be a message before the terminal device receives the terminal device specific reference signal configuration information for the first time after receiving message 4.

As an example, the first indication information received by the terminal device may be carried on message B or on PDCCH scheduling message B.

In this example, an additional field, e.g., a 1-bit field, may be included in the PDCCH of the message B or scheduling message B for indicating the identity of the first reference signal. Thus, when receiving the message B or the PDCCH of the scheduling message B sent by the network device, the terminal device may determine the first reference signal from the multiple reference signals through the identifier of the first reference signal carried in the message B or the PDCCH of the scheduling message B. In this way, the terminal device may receive the first message by using the first transmission relationship between the first reference signal and the first message, where the first message may be a message before the terminal device receives the reference signal configuration information specific to the terminal device for the first time after receiving the message B.

S704, the network device transmits a first reference signal. Accordingly, the terminal device receives the first reference signal.

S705, the network device sends a first message to the terminal device.

S706, the terminal device receives the first message based on the first transmission relation, where the first transmission relation indicates that the first reference signal and the first message have the same or similar spatial characteristic parameters.

Step S704 to step S706 may refer to step S602 to step S604, respectively, and are not described herein.

In this embodiment, the network device may determine the first reference signal, and instruct the terminal device through the first indication information, where the terminal device accurately determines the first reference signal according to the first indication information, so that it may be ensured that the first reference signals determined by the terminal device and the network device are the same. The terminal equipment receives the first message by adopting the spatial characteristic parameters which are the same as or similar to the first reference signal, and can more accurately receive the first message based on the first transmission relation, so that the receiving performance of the first message can be improved, and the success rate of accessing the first message is improved. Meanwhile, the method provided by the embodiment can also more accurately receive the message before the special reference signal configuration information of the terminal equipment is received for the first time after random access, thereby improving the different first message receiving success rate.

Fig. 8 shows a schematic flow chart of a method 800 for transmitting information provided in an embodiment of the present application. The embodiment is applicable to a four-step random access procedure based on contention or a two-step random access procedure based on contention. The method 800 shown in fig. 8 may be interactively performed by a network device and a terminal device, and may specifically include steps S801 to S807.

S801, the network device transmits configuration information of a plurality of reference signals. Accordingly, the terminal device receives configuration information of the plurality of reference signals.

Before the network device sends the configuration information of the plurality of reference signals through SIB1, the network device also needs to broadcast an SSB to the terminal device, where the SSB carries the configuration information of SIB1, as in step S601. The terminal equipment determines the configuration information of the SIB1 according to the SSB sent by the network equipment, and receives the SIB1 according to the configuration information of the SIB1, wherein the SIB1 can carry the configuration information of a plurality of reference signals.

For details of this step, reference may be made to step S601, which is not described herein for brevity.

S802, the terminal equipment determines a first reference signal from a plurality of reference signals.

The terminal device may receive configuration information of a plurality of reference signals, the configuration information of the plurality of reference signals corresponding to the plurality of signals. The terminal device may receive the plurality of reference signals based on configuration information of the plurality of reference signals, the plurality of reference signals including the first reference signal.

Alternatively, the terminal device may determine the first reference signal from the plurality of reference signals based on a preset rule. Alternatively, the terminal device may measure the reference signals transmitted by the network device on different TRPs received in the preset range, measure the average RSRP, the average RSRQ and the average SINR of the plurality of reference signals, and determine the first reference signal according to the measurement result.

For example, the terminal device may determine the reference signal with the largest average RSRP among the plurality of reference signals as the first reference signal, or the terminal device may determine the reference signal with the largest average RSRQ among the plurality of reference signals as the first reference signal, or the terminal device may determine the reference signal with the largest average SINR among the plurality of reference signals as the first reference signal.

According to the current protocol, there is a correspondence between SSB and random access preamble, but there is no correspondence between reference signal and random access preamble. Thus, in embodiments of the present application, the relation between the reference signal and the SSB and/or the reference signal and the random access preamble may be predefined.

It should be appreciated that SSBs may correspond to one wide beam and reference signals may correspond to one narrow beam, which may be considered part of the wide beam coverage. In other words, the network device may send one SSB and one or more reference signals on each TRP.

That is, the correspondence between SSBs and reference signals may be one-to-many or one-to-one, i.e., one SSB corresponds to one or more reference signals and one reference signal corresponds to one SSB. Similarly, there is a correspondence between the random access preambles and the reference signals, which may also be one-to-many or one-to-one, i.e. each random access preamble corresponds to one or more reference signals, and each reference signal corresponds to one random access preamble.

In one example, the network device may specify an association between the SSB and the reference signal in SIB 1. For example, the network device may specify the SSB in the SIB ₁ The corresponding reference signal is TRS ₁ 、TRS ₂ And TRS (TRS) ₃ ；SSB ₂ The corresponding reference signal is TRS ₄ 、TRS ₅ And TRS (TRS) ₆ ；SSB ₃ The corresponding reference signal is TRS ₇ 、TRS ₈ And TRS (TRS) ₉ And so on. Similarly, the network device may specify an association between the random access preamble and the reference signal in SIB 1.

In one example, the relationship between SSBs and reference signals may be predefined by a protocol. For example, a first transmission relationship (e.g., QCL relationship) between the SSB and each reference signal may be predefined in the protocol, and all reference signals having the first transmission relationship with the SSB may be considered as one reference signal set. That is, there may be a first transmission relationship between one SSB and a plurality of reference signals. Similarly, the relation between the random access preamble and the reference signal may be predefined by the protocol.

In the practical application process, the relation between the reference signal and the SSB and the relation between the reference signal and the random access preamble may be predefined in other ways, which is not limited in the present application.

Optionally, after the predefined relation between the reference signal and the SSB and the reference signal and the random access preamble, the terminal device may further determine the first reference signal from the plurality of reference signals by:

first, the terminal device may determine a first SSB from among the SSBs based on a preset rule according to the SSB measurement result. For example, the terminal device may determine the first SSB according to an average RSRP, an average RSRQ, and an average SINR of the different SSBs received in the preset range. Alternatively, the terminal device may determine that the average RSRP of the different SSBs is the largest as the first SSB, or determine that the average RSRQ of the different SSBs is the largest as the first SSB, or determine that the average SINR of the different SSBs is the largest as the first SSB. Secondly, the terminal equipment can determine the reference signal corresponding to the first SSB according to the corresponding relation between the SSB and the reference signal. Finally, the terminal device may determine the first reference signal from the reference signals corresponding to the first SSB based on a preset rule.

S803, the terminal device sends the second indication information to the network device.

After the terminal device performs step S802, the first reference signal may be determined, and second indication information may be sent to the network device, where the second indication information is used to indicate the identifier of the first reference signal.

Alternatively, the second indication information may be carried in message 3 in the contention-based four-step random access, message a in the contention-based two-step random access, or PDCCH scheduling the message 3, which is not limited in this application.

As an example, the second indication information received by the network device may be carried on message 3 or on the PDCCH of scheduling message 3. For example, an additional field, e.g., a 1-bit field, may be included in the PDCCH of the message 3 or scheduling message 3 for indicating the identity of the first reference signal. Thus, when the network device receives the PDCCH of the message 3 or the scheduling message 3 sent by the terminal device, the first reference signal can be determined through the PDCCH of the message 3 or the scheduling message 3.

As one example, the second indication information received by the network device may be carried on message a. For example, an additional field, such as a 1-bit field, may be included in the message a to indicate the identity of the first reference signal. Thus, when the network device receives the message a sent by the terminal device, the first reference signal can be determined through the message a.

Alternatively, the second indication information may be a random access preamble in a contention-based four-step random access, and the network device may determine the first reference signal determined by the terminal device according to the correspondence between the received random access preamble and the reference signal, because the random access preamble has the correspondence with the first reference signal.

And S804, the network equipment determines a first reference signal according to the second indication information.

Specifically, after the network device receives the second indication information sent by the terminal device, the first reference signal may be determined according to the second indication information. The network device may determine to transmit the first reference signal on the first TRP according to a correspondence between the reference signal and the TRP, so that the first reference signal and the first message may be transmitted to the terminal device on the first TRP.

S805, the network device transmits a first reference signal. Accordingly, the terminal device receives the first reference signal.

S806, the network device sends the first message to the terminal device.

S807, the terminal device receives the first message based on the first transmission relation indicating that the first reference signal and the first message have the same or similar spatial characteristic parameters.

Step S805 to step S807 may refer to step S602 to step S604, and are not described herein for brevity.

In this embodiment, the terminal device may determine the first reference signal, and instruct the network device through the second indication information, where the network device accurately determines the first reference signal according to the second indication information, so that it may be ensured that the first reference signals determined by the terminal device and the network device are the same. The terminal equipment receives the first message by adopting the spatial characteristic parameters which are the same as or similar to the first reference signal, and can more accurately receive the first message based on the first transmission relation, so that the receiving performance of the first message can be improved, and the success rate of accessing the first message is improved. Meanwhile, the method provided by the embodiment can also more accurately receive the message before the special reference signal configuration information of the terminal equipment is received for the first time after random access, thereby improving the different first message receiving success rate.

The method for transmitting information provided in the embodiment of the present application is described above with reference to fig. 6 to fig. 8, hereinafter, the reference signal is taken as a TRS, the first transmission relationship is taken as a QCL relationship, and the method for transmitting information provided in the embodiment of the present application is specifically described with reference to fig. 9 to fig. 15. Among them, fig. 9, 11, 12 and 14 are applicable to a contention-based four-step random access procedure, and fig. 10, 13 and 15 are applicable to a contention-based two-step random access procedure.

Fig. 9 shows a schematic flowchart of a method 900 for transmitting information provided in an embodiment of the present application. The embodiment is suitable for a four-step random access process based on competition. The method 900 shown in fig. 9 may be interactively performed by a network device and a terminal device, and may specifically include steps S901 to S911.

S901, the network device broadcasts and transmits SSB. Accordingly, the terminal device receives the SSB.

This step may refer to step S501, and will not be described here again for brevity.

It should be noted that, the SSB that the network device broadcasts and sends to the terminal device carries the configuration information of SIB1, and the SSB that the terminal device receives may determine the configuration information of SIB1 and receive SIB1 according to the configuration information of SIB1.

S902, the network device broadcasts configuration information of one TRS in SIB1. Accordingly, the terminal device receives configuration information of one TRS.

This step may refer to step S501 and step S801, and will not be described here again for brevity.

It should be appreciated that the network device may transmit downlink data on one or more TRPs. That is, the network device may transmit downlink data in an SFN transmission mode or in a non-SFN transmission mode.

Optionally, when the network device transmits the downlink data in a non-SFN transmission manner, the network device may determine to transmit the downlink data to the terminal device on a TRP of the plurality of TRPs, that is, the method 900 may further include step S903, where the network device determines the first TRP.

Step S903 is an optional step similar to step S504. When the network device transmits downlink data in a non-SFN transmission manner, step S903 may be performed, and the network device may determine the first TRP from the plurality of TRPs according to a preset rule. Wherein the first TRP is one of a plurality of TRPs, and the network device may send downlink data to the terminal device on the first TRP. Alternatively, the downlink data may be a message in the access procedure, e.g., RAR, message 4, etc.

For example, the network device may measure the average RSRP, the average RSRQ, and the average SINR of preambles transmitted by other terminal devices received on different TRPs over a period of time in the past to determine the first TRP. For example, the network device may determine that the TRP with the largest average RSRP of the preambles received on the different TRPs is the first TRP, or the network device may determine that the TRP with the largest average RSRQ of the preambles received on the different TRPs is the first TRP, or the network device may determine that the TRP with the largest average SINR of the preambles received on the different TRPs is the first TRP.

It should be appreciated that, in the practical application, the network device may also determine the first TRP based on other rules, which will not be described in detail herein.

It is noted that since the network device broadcasts configuration information of one TRS, that is, configuration information using one and the same TRS throughout the coverage area of the network device (i.e., throughout the cell). Thus, the first TRP determined by the network device may be determined from other terminal devices within the coverage area of the network device. In this case, step S903 may be performed before step S905.

S904, the terminal device measures SSB and selects a preamble according to the measurement result.

S905, the terminal device transmits a random access preamble. Accordingly, the network device receives the random access preamble.

Steps S904 and S905 may refer to steps S502 and S503, respectively, and will not be described again.

S906, the network device transmits a first TRS. Accordingly, the terminal device receives the first TRS.

Alternatively, the network device may transmit the first TRS to the terminal device in an SFN transmission manner on the plurality of TRPs, i.e. the network device does not perform step S903, in which case the terminal device is able to receive the same first TRS transmitted by the network device on a different TRP.

Alternatively, the network device may send the first TRS to the terminal device on a first TRP of the plurality of TRPs, i.e. the network device performs step S903. Accordingly, the terminal device may receive the first TRS transmitted by the network device based on the configuration information of the first TRS.

S907, the network device sends a random access response RAR to the terminal device.

Alternatively, the network device may send the PDSCH (on which the RAR may be carried) and the PDCCH for scheduling the PDSCH to the terminal device in the SFN transmission manner, i.e., the network device may send the PDSCH (on which the RAR may be carried) and the PDCCH for scheduling the PDSCH to the terminal device on a plurality of TRPs (the network device does not perform step S903). In this case, the terminal device can receive the same PDSCH (on which RAR may be carried) and PDCCH scheduling PDSCH transmitted by the network device on different TRPs.

Alternatively, the network device may send the PDSCH (on which the RAR may be carried) and the PDCCH for scheduling the PDSCH to the terminal device in a non-SFN transmission manner, i.e., the network device may send the PDSCH (on which the RAR may be carried) and the PDCCH for scheduling the PDSCH to the terminal device on the first TRP (the network device performs step S903). In this case, the terminal device can receive a PDCCH on which the network device transmits a PDSCH (on which RAR may be carried) and a scheduled PDSCH on the first TRP.

The content of this step may refer to step S505, and for brevity, will not be described here again.

S908, the terminal device receives the RAR according to the QCL relationship between the RAR and the first TRS.

Specifically, after the terminal device transmits the random access preamble, it detects PDSCH (on which RAR may be carried) and PDCCH scheduling PDSCH in the RAR time window to receive RAR corresponding to RA-RNTI. If the RAR replied by the network equipment is not received in the RAR time window, the random access procedure is considered to be failed.

In this step, the PDSCH (on which the RAR may be carried) may be predefined in the protocol and the types a and D in the QCL relationship, i.e. all QCL attributes, exist between the PDCCH scheduling the PDSCH and the first TRS. Therefore, the terminal device may determine, according to the received first TRS, the parameter information such as beam, delay, doppler, etc. of the PDSCH (on which the RAR may be carried) and the PDCCH for scheduling the PDSCH transmitted by the network device.

S909, the terminal device transmits a connection request message Msg3 to the network device.

This step may refer to step S507, and will not be described here again for brevity.

S910, the network device sends a contention resolution message Msg4 to the terminal device.

Alternatively, the network device may send the PDSCH (on which Msg4 may be carried) and the PDCCH for scheduling the PDSCH to the terminal device in the SFN transmission manner, that is, the network device may send the PDSCH (on which Msg4 may be carried) and the PDCCH for scheduling the PDSCH to the terminal device on a plurality of TRPs (the network device does not perform step S903). In this case, the terminal device can receive the same PDSCH (on which Msg4 may be carried) and PDCCH scheduling PDSCH transmitted by the network device on different TRPs.

Alternatively, the network device may send the PDSCH (on which Msg4 may be carried) and the PDCCH for scheduling the PDSCH to the terminal device in a non-SFN transmission manner, i.e., the network device may send the PDSCH (on which Msg4 may be carried) and the PDCCH for scheduling the PDSCH to the terminal device on the first TRP (the network device performs step S903). In this case, the terminal device is able to receive the PDCCH on which the network device transmits PDSCH (on which Msg4 may be carried) on the first TRP and schedules PDSCH.

For other contents of this step, reference may be made to step S340 and step S508, and for brevity, the description thereof will not be repeated here.

S911, the terminal device receives the Msg4 according to the QCL relation between the Msg4 and the first TRS.

In this step, the PDSCH (on which Msg4 may be carried) may be predefined in the protocol and there are types a and D in the QCL relationship, i.e. all QCL attributes, between the PDCCH scheduling the PDSCH and the first TRS. Therefore, the terminal device may determine, according to the received first TRS, the network device to send PDSCH (on which Msg4 may be carried) and parameter information such as beam, delay, doppler, etc. of PDCCH for scheduling PDSCH.

After the terminal device sends Msg3, it will detect PDSCH (on which Msg4 can be carried) and PDCCH scheduling PDSCH in a preset time range.

For other content of this step, reference may be made to step S340, which is not described here again.

In some embodiments, the network device may also transmit PDSCH and PDCCH scheduling PDSCH to the terminal device, wherein some data or information may be carried on PDSCH, before first receiving terminal device specific reference signal configuration information after step S911. The terminal device may still receive the PDSCH and the PDCCH scheduling the PDSCH according to the QCL relationship between the PDSCH and the PDCCH scheduling the PDSCH and the first TRS.

In the embodiment of the application, the terminal device broadcasts configuration information of a common TRS in SIB1 by receiving the network device, and receives the first TRS on the configuration information. Thus, the terminal equipment can accurately measure the corresponding channel conditions according to the received first TRS, so that more accurate channel conditions of RAR and Msg4 are obtained according to the QCL relation between the first TRS and RAR and between the first TRS and Msg4, the receiving performance of RAR and Msg4 is improved, and the success rate of four-step random access based on competition is improved. Meanwhile, the method provided by the embodiment can also more accurately receive the message before the special reference signal configuration information of the terminal equipment is received for the first time after random access, thereby improving the success rate of receiving different messages.

Fig. 10 shows a schematic flow chart of a method 1000 for transmitting information provided in an embodiment of the present application. The embodiment is applicable to a two-step random access procedure based on contention. The method 1000 shown in fig. 10 may be interactively performed by a network device and a terminal device, and may specifically include steps S1001 to S1008.

S1001, the network device broadcasts and transmits SSB. Accordingly, the terminal device receives the SSB.

S1002, the network device broadcasts configuration information of one TRS in SIB 1. Accordingly, the terminal device receives configuration information of one TRS.

Optionally, the method 1000 may further include step S1003, where the network device determines a first TRP.

S1004, the terminal equipment measures SSB and selects a preamble according to the measurement result.

Step S1001 to step S1004 may refer to step S901 to step S904, which will not be described in detail.

S1005, the terminal device transmits a random access preamble and a connection request (MsgA) to the network device.

S1006, the network device transmits the first TRS. Accordingly, the terminal device receives the first TRS.

Steps S1005 and S1006 may refer to steps S410 and S906, respectively, and will not be described again.

S1007, the network device sends an MsgB message to the terminal device.

Alternatively, the network device may send the PDSCH (on which the MsgB may be carried) and the PDCCH for scheduling the PDSCH to the terminal device in the SFN transmission manner, that is, the network device may send the PDSCH (on which the MsgB may be carried) and the PDCCH for scheduling the PDSCH to the terminal device on a plurality of TRPs (the network device does not perform step S903). In this case, the terminal device can receive the same PDSCH (on which MsgB may be carried) and PDCCH scheduling PDSCH transmitted by the network device on different TRPs.

Alternatively, the network device may send the PDSCH (on which the MsgB may be carried) and the PDCCH for scheduling the PDSCH to the terminal device in a non-SFN transmission manner, i.e., the network device may send the PDSCH (on which the MsgB may be carried) and the PDCCH for scheduling the PDSCH to the terminal device on the first TRP (the network device performs step S903). In this case, the terminal device is able to receive the PDCCH on which the network device transmits PDSCH (on which MsgB may be carried) and the scheduled PDSCH on the first TRP. For other contents of this step, reference may be made to step S420, and for brevity, will not be described here again.

S1008, the terminal equipment receives the MsgB according to the QCL relation between the MsgB and the first TRS.

In this step, the PDSCH (on which the MsgB may be carried) may be predefined in the protocol and there are types a and D in the QCL relationship, i.e. all QCL attributes, between the PDCCH scheduling the PDSCH and the first TRS. Therefore, the terminal device may determine, according to the received first TRS, the network device to send PDSCH (on which MsgB may be carried) and parameter information such as beam, delay, doppler, etc. of PDCCH for scheduling PDSCH.

After the terminal device sends Msg3, it will detect PDSCH (on which MsgB can be carried) and PDCCH scheduling PDSCH in a preset time range.

In some embodiments, before first receiving the terminal device-specific reference signal configuration information after step S1008, the network device may also send PDSCH and PDCCH scheduling PDSCH to the terminal device, where some data or information may be carried on PDSCH. The terminal device may still receive the PDSCH and the PDCCH scheduling the PDSCH according to the QCL relationship between the PDSCH and the PDCCH scheduling the PDSCH and the first TRS.

In the embodiment of the application, the terminal device broadcasts configuration information of a common TRS in SIB1 by receiving the network device, and receives the first TRS on the configuration information. Thus, the terminal equipment can accurately measure the corresponding channel condition according to the received first TRS, so that the more accurate channel condition of the MsgB is obtained according to the QCL relation between the first TRS and the MsgB, the receiving performance of the MsgB is improved, and the success rate of two-step random access based on competition is improved. Meanwhile, the method provided by the embodiment can also more accurately receive the message before the special reference signal configuration information of the terminal equipment is received for the first time after random access, thereby improving the success rate of receiving different messages.

Fig. 11 shows a schematic flow chart of a method 1100 for transmitting information according to an embodiment of the present application. The embodiment is suitable for a four-step random access process based on competition. The method 1100 shown in fig. 11 may be interactively performed by a network device and a terminal device, and may specifically include steps S1101 to S1111.

S1101, the network device broadcasts and transmits SSB. Accordingly, the terminal device receives the SSB.

This step may refer to step S501 and step S901, and will not be described here again for brevity.

S1102, the network device broadcasts configuration information of a plurality of TRSs in SIB 1. Accordingly, the terminal device receives configuration information of the plurality of TRSs.

This step may refer to step S801, and will not be described here again for brevity.

S1103, the terminal device measures SSB, and selects a preamble according to the measurement result.

S1104, the terminal device transmits a random access preamble. Accordingly, the network device receives the random access preamble.

Optionally, the method 1100 may further include step S1105, where the network device determines the first TRP.

Step S1103 to step S1105 may refer to step S502 to step S504, and are not described herein.

S1106, the network device transmits a first TRS. Accordingly, the terminal device receives the first TRS.

This step may refer to step S906, and will not be described here again for brevity.

S1107, the network device sends a random access response RAR to the terminal device, where the RAR carries the first indication information.

In this step, the first indication information may be carried on the RAR or on a PDCCH scheduling the RAR.

For details of this step, reference may be made to steps S703 and S907, and for brevity, details are not repeated here.

S1108, the terminal equipment receives the RAR according to the QCL relation between the RAR and the SSB.

In this step, since the terminal device cannot accurately or a certain TRS among the plurality of TRSs has a QCL relationship with the PDSCH (on which the RAR may be carried) and the PDCCH scheduling the PDSCH. Thus, in this step, the PDSCH transmitted by the network device (on which the RAR may be carried) and the PDCCH for scheduling the PDSCH are still received in the manner of the prior art, i.e., the PDSCH transmitted by the network device (on which the RAR may be carried) and the PDCCH for scheduling the PDSCH are received in the manner of step S506.

The specific content of this step may refer to step S506, and for brevity, will not be described here again.

S1109, the terminal device transmits a connection request message Msg3 to the network device.

S1110, the network device sends a contention resolution message Msg4 to the terminal device.

S1111, the terminal device receives the Msg4 according to the QCL relation between the Msg4 and the first TRS.

Steps S1109, S1110, S1111 may refer to steps S507, S910, S911 described above, respectively, and will not be described again.

In some embodiments, before receiving the terminal device-specific reference signal configuration information for the first time after step S1111, the network device may also send PDSCH and PDCCH scheduling PDSCH to the terminal device, where some data or information may be carried on the PDSCH. The terminal device may still receive the PDSCH and the PDCCH scheduling the PDSCH according to the QCL relationship between the PDSCH and the PDCCH scheduling the PDSCH and the first TRS.

In the embodiment of the application, when the network device sends a plurality of TRSs and the network device determines the first TRS, the network device may instruct the terminal device by carrying the first indication information in the RAR, so that the terminal device may accurately determine that the first TRS has a QCL relationship with the Msg4 according to the first indication information, thereby improving the receiving performance of the Msg4 and improving the success rate of four-step random access based on contention. Meanwhile, the method provided by the embodiment can also more accurately receive the message before the special reference signal configuration information of the terminal equipment is received for the first time after random access, thereby improving the success rate of receiving different messages.

Fig. 12 shows a schematic flow chart of a method 1200 of transmitting information provided by an embodiment of the present application. The embodiment is suitable for a four-step random access process based on competition. The method 1200 shown in fig. 12 may be interactively performed by a network device and a terminal device, and may specifically include steps S1201 to S1211.

S1201, the network device broadcasts and transmits the SSB. Accordingly, the terminal device receives the SSB.

S1202, the network device broadcasts configuration information of at least one TRS in SIB 1. Accordingly, the terminal device receives configuration information of at least one TRS.

The specific details of this step may refer to step S801, which is not described here again for brevity.

S1203, the terminal device measures the SSB and the TRS, determines the first SSB and the first TRS corresponding thereto, and selects the preamble corresponding to the first SSB.

It should be noted that, according to the current protocol, there is a correspondence between SSB and preamble, and the correspondence between SSB and preamble may be one-to-one, one-to-many, or many-to-one. The terminal device may determine its corresponding preamble from the selected first SSB. Correspondingly, the network device may also indirectly determine the first SSB selected by the terminal device and the first TRP for transmitting the first SSB according to the preamble transmitted by the terminal device.

For details of this step, reference may be made to step S502 and step S802, which are not described here again for brevity.

And S1204, the terminal equipment sends the random access preamble corresponding to the first SSB to the network equipment.

This step may refer to step S503, and will not be described here again for brevity.

S1205, the network device determines a first TRP.

In step S1204, the network device may receive the random access preamble transmitted by the terminal device, where the random access preamble has a correspondence with the SSB according to the current protocol, so that the network device may determine the first SSB corresponding to the random access preamble according to the random access preamble transmitted by the terminal device. The network device may then determine a first TRP from which to send the first SSB based on the first SSB and send a corresponding message on the first TRP.

S1206, the network device transmits the first TRS. Accordingly, the terminal device receives the first TRS.

S1207, the network device sends a random access response RAR to the terminal device.

Steps S1206 and S1207 may refer to steps S906 and S907, respectively, and are not described herein.

S1208, the terminal equipment receives the RAR according to the QCL relation between the RAR and the SSB.

As described in step S1202, the network device may transmit one SSB and one or more reference signals on each TRP, that is, the first TRP may transmit multiple TRSs. In this step, the network device cannot determine the first TRS selected by the terminal device, and therefore still receives the PDSCH transmitted by the network device (on which the RAR may be carried) and the PDCCH for scheduling the PDSCH in a manner known in the art, i.e., receives the PDSCH transmitted by the network device (on which the RAR may be carried) and the PDCCH for scheduling the PDSCH in a manner known in step S506.

S1209, the terminal device sends a connection request message Msg3 to the network device, where Msg3 carries the second indication information.

In this step, second indication information may be carried on the Msg3 and used to indicate the identity of the first reference signal, and the network device may determine, according to the second indication information, the first TRS selected by the terminal device, so that a message after the Msg3 may be sent to the terminal device according to the spatial characteristic parameter of the first TRS.

For details of this step, reference may be made to step S507 and step S803, which are not described here again for brevity.

S1210, the network device sends a contention resolution message Msg4 to the terminal device.

S1211, the terminal device receives the Msg4 according to the QCL relationship between the Msg4 and the first TRS.

Steps S1210 and S1211 may refer to steps S910 and S911, respectively, and will not be described again.

In some embodiments, before first receiving the terminal device-specific reference signal configuration information after step S1211, the network device may also send PDSCH and PDCCH scheduling PDSCH to the terminal device, where some data or information may be carried on the PDSCH. The terminal device may still receive the PDSCH and the PDCCH scheduling the PDSCH according to the QCL relationship between the PDSCH and the PDCCH scheduling the PDSCH and the first TRS.

In the embodiment of the application, when the terminal device determines the first TRS, the terminal device may carry the second indication information in the Msg3 to indicate the network device, so that the network device can accurately determine that the first TRS has the QCL relationship with the Msg4 according to the second indication information, thereby improving the receiving performance of the Msg4 and improving the success rate of four-step random access based on contention. Meanwhile, the method provided by the embodiment can also more accurately receive the message before the special reference signal configuration information of the terminal equipment is received for the first time after random access, thereby improving the success rate of receiving different messages.

Fig. 13 shows a schematic flowchart of a method 1300 for transmitting information provided in an embodiment of the present application. The embodiment is applicable to a two-step random access procedure based on contention. The method 1300 shown in fig. 13 may be interactively performed by a network device and a terminal device, and may specifically include steps S1301 to S1308.

S1301, the network device broadcasts and transmits SSB. Accordingly, the terminal device receives the SSB.

The network device broadcasts configuration information of at least one TRS in SIB 1S 1302. Accordingly, the terminal device receives configuration information of at least one TRS.

This step may refer to step S801 and step S1202, and will not be described here again for brevity.

S1303, the terminal device measures SSB and TRS, determines the first SSB and the corresponding first TRS, and selects the preamble corresponding to the first SSB.

This step may refer to step S502, step S802 and step S1203, and will not be described here again for brevity.

S1304, the terminal device sends an MsgA to the network device, wherein the MsgA carries second indication information.

In this step, the second indication information may be carried on the MsgA and used to indicate the identity of the first reference signal, and the network device may determine, according to the second indication information, the first TRS selected by the terminal device, so that a message after the MsgA may be sent to the terminal device according to the spatial characteristic parameter of the first TRS.

S1305, the network device determines a first TRP.

Through step S1304, the network device may receive the MsgA and the second indication information carried by the MsgA, and the network device may determine the first TRS indicated in the second indication information according to the second indication information, thereby determining a first TRP corresponding to the first TRS, and send a corresponding message on the first TRP.

S1306, the network device transmits the first TRS. Accordingly, the terminal device receives the first TRS.

S1307, the network device sends an MsgB message to the terminal device.

This step may refer to step S420 and step S1007, and will not be described here again for brevity.

S1308, the terminal device receives the MsgB according to the QCL relationship between the MsgB and the first TRS.

This step may refer to step S1008, and will not be described here again for brevity.

In some embodiments, before first receiving the terminal device-specific reference signal configuration information after step S1308, the network device may also send PDSCH and PDCCH scheduling PDSCH to the terminal device, where some data or information may be carried on PDSCH. The terminal device may still receive the PDSCH and the PDCCH scheduling the PDSCH according to the QCL relationship between the PDSCH and the PDCCH scheduling the PDSCH and the first TRS.

In the embodiment of the application, when the terminal device determines the first TRS, the terminal device may carry the second indication information in the MsgA to indicate the network device, so that the network device can accurately determine that the first TRS has the QCL relationship with the MsgB according to the second indication information, thereby improving the reception performance of the MsgB and improving the success rate of the four-step random access based on contention. Meanwhile, the method provided by the embodiment can also more accurately receive the message before the special reference signal configuration information of the terminal equipment is received for the first time after random access, thereby improving the success rate of receiving different messages.

Fig. 14 shows a schematic flow chart of a method 1400 of transmitting information provided by an embodiment of the present application. The embodiment is suitable for a four-step random access process based on competition. The method 1400 shown in fig. 14 may be interactively performed by a network device and a terminal device, and may specifically include steps S1401 to S1411.

S1401, the network device broadcasts and transmits SSB. Accordingly, the terminal device receives the SSB.

S1402, the network device broadcasts configuration information of at least one TRS in SIB 1. Accordingly, the terminal device receives configuration information of at least one TRS.

Similarly, this step may refer to step S801 and step S1202, and will not be described here again.

S1403, the terminal device measures SSB and TRS, determines the first SSB and the first TRS corresponding thereto, and selects the preamble corresponding to the first TRS.

As described in step S802, the TRSs have corresponding correspondence with the random access preamble and/or the TRSs and SSBs, so the terminal device may determine the first TRS from the plurality of TRSs according to a preset rule.

For example, the terminal device may measure an average RSRP, an average RSRQ, and an average SINR of the plurality of TRSs transmitted by the network device to determine the first TRS. For example, the terminal device may determine, from the plurality of TRSs, the TRS with the largest average RSRP as the first TRS, or the terminal device may determine, from the plurality of TRSs, the TRS with the largest average RSRQ as the first TRS, or the terminal device may determine, from the plurality of TRSs, the TRS with the largest average SINR as the first TRS.

S1404, the terminal device sends a random access preamble corresponding to the first TRS to the network device.

This step may refer to step S503, and will not be described here.

The network device determines a first TRP S1405.

Through step S1404, the network device may receive the random access preamble transmitted by the terminal device, and according to the steps S801 and S1202, the random access preamble and the TRS also have a correspondence, so that the network device may determine, according to the random access preamble transmitted by the terminal device, the first TRS corresponding to the random access preamble. So that the network device can determine a first TRP to send the first TRS according to the first TRS and send a corresponding message on the first TRP.

S1406, the network device sends a first TRS. Accordingly, the terminal device receives the first TRS.

S1407, the network device sends a random access response RAR to the terminal device, where the RAR carries the first indication information.

S1408, the terminal device receives the RAR according to the QCL relationship between the RAR and the SSB.

Steps S1406 and S1408 may refer to steps S906, S907 and S506, respectively, and will not be described again.

S1409, the terminal device sends a connection request message Msg3 to the network device.

S1410, the network device sends a contention resolution message Msg4 to the terminal device.

S1411, the terminal device receives Msg4 according to the QCL relationship between Msg4 and the first TRS.

Step S1409 to step S1411 may refer to step S909 to step S911, and are not described here.

In some embodiments, before receiving the terminal device-specific reference signal configuration information for the first time after step S1411, the network device may also send PDSCH and PDCCH scheduling PDSCH to the terminal device, where some data or information may be carried on the PDSCH. The terminal device may still receive the PDSCH and the PDCCH scheduling the PDSCH according to the QCL relationship between the PDSCH and the PDCCH scheduling the PDSCH and the first TRS.

In the embodiment of the application, when the terminal equipment determines the first TRS, the terminal equipment can directly send the random access preamble with the association relation with the first TRS to the network equipment, so that the network equipment can accurately determine the QCL relation between the first TRS and the RAR and the Msg4 according to the random access preamble, thereby improving the receiving performance of the RAR and the Msg4 and improving the success rate of four-step random access based on competition. Meanwhile, the method provided by the embodiment can also more accurately receive the message before the special reference signal configuration information of the terminal equipment is received for the first time after random access, thereby improving the success rate of receiving different messages

Fig. 15 shows a schematic flowchart of a method 1500 for transmitting information provided in an embodiment of the present application. The embodiment is applicable to a two-step random access procedure based on contention. The method 1500 shown in fig. 15 may be interactively performed by a network device and a terminal device, and may specifically include steps S1501 to S1508.

S1501, the network device broadcasts and transmits SSB. Accordingly, the terminal device receives the SSB.

S1502, the network device broadcasts configuration information of at least one TRS in SIB 1. Accordingly, the terminal device receives configuration information of at least one TRS.

S1503, the terminal device measures SSB and TRS, determines the first SSB and the corresponding first TRS, and selects the preamble corresponding to the first TRS.

This step may refer to step S1403, and is not described here again for brevity.

S1504, the terminal device sends MsgA to the network device.

It should be understood that the MsgA sent by the terminal device to the network device includes the random access preamble corresponding to the first TRS and other information.

The other contents of this step may refer to step S507 and step S803, and will not be described here.

S1505, the network device determines a first TRP.

S1506, the network device transmits the first TRS. Accordingly, the terminal device receives the first TRS.

Steps S1505 and S1506 may refer to steps S1405 and S906, respectively, and will not be described again.

S1507, the network device sends an MsgB message to the terminal device.

S1508, the terminal device receives the MsgB according to the QCL relationship between the MsgB and the first TRS.

In some embodiments, before first receiving the terminal device-specific reference signal configuration information after step S1508, the network device may also send PDSCH and PDCCH scheduling PDSCH to the terminal device, where some data or information may be carried on the PDSCH. The terminal device may still receive the PDSCH and the PDCCH scheduling the PDSCH according to the QCL relationship between the PDSCH and the PDCCH scheduling the PDSCH and the first TRS.

In the embodiment of the application, when the terminal equipment determines the first TRS, the terminal equipment can directly send the random access preamble with the association relation with the first TRS to the network equipment, so that the network equipment can accurately determine the QCL relation between the first TRS and the MsgB according to the random access preamble, thereby improving the reception performance of the MsgB and improving the success rate of four-step random access based on competition. Meanwhile, the method provided by the embodiment can also more accurately receive the message before the special reference signal configuration information of the terminal equipment is received for the first time after random access, thereby improving the success rate of receiving different messages.

Method embodiments of the present application are described in detail above in connection with fig. 1-15, and apparatus embodiments of the present application are described below in connection with fig. 16-19. It is to be understood that the description of the method embodiments corresponds to the description of the device embodiments, and that parts not described in detail can therefore be seen in the preceding method embodiments.

Fig. 16 is a schematic structural diagram of an apparatus 1600 for transmitting information provided in an embodiment of the present application. As shown in fig. 16, the apparatus 1600 for transmitting information may include: a transceiver unit 1610 and a processing unit 1620.

In one possible design, the device for transmitting information may be a terminal device in the methods 600 to 1500, or a chip in the terminal device.

Specifically, the transceiver 1610 is configured to:

receiving configuration information of at least one reference signal, wherein the configuration information of the at least one reference signal comprises configuration information of a first reference signal;

receiving the first reference signal based on configuration information of the first reference signal;

and receiving a first message based on a first transmission relation, wherein the first transmission relation indicates that the first reference signal and the first message have the same or similar spatial characteristic parameters, the first message is used for random access, or the first message is a message before the first receiving of the reference signal configuration information special for the terminal equipment after random access, and the message is carried on a physical downlink shared channel PDSCH or a physical downlink control channel PDCCH for scheduling the PDSCH.

Optionally, the configuration information of the at least one reference signal is configuration information of a plurality of reference signals, the configuration information of the plurality of reference signals corresponds to a plurality of reference signals, the plurality of reference signals includes the first reference signal, and

the transceiver 1610 is specifically configured to receive first indication information, where the first indication information is used to indicate an identifier of the first reference signal.

Optionally, the first indication information is carried in a random access response RAR in a contention-based four-step random access, a message 4 in a contention-based four-step random access, a message B in a contention-based two-step random access, a PDCCH scheduling the RAR, a PDCCH scheduling the message 4, a PDCCH scheduling the message B, or a PDCCH scheduling a retransmission message 3.

the processing unit 1620 is configured to determine the first reference signal from the plurality of reference signals;

the transceiver 1610 is specifically configured to send second indication information, where the second indication information is used to indicate the identity of the first reference signal.

Alternatively, the second indication information is carried on message 3 in the four-step random access based on contention, message a in the two-step random access based on contention, or PDCCH scheduling the message 3.

Optionally, the second indication information is a random access preamble in a contention-based four-step random access, and the random access preamble has a correspondence relationship with the first reference signal.

Optionally, the spatial characteristic parameter is one or more of: delay spread, doppler shift, average delay, average gain, and spatial reception parameters.

Optionally, the configuration information of the reference signal, the first reference signal is broadcast periodically.

It is to be understood that the apparatus 1600 for transmitting information may correspond to the terminal devices in the methods 600 to 1500 for transmitting information according to the embodiments of the present application, and the apparatus 1600 for transmitting information may include units for performing the methods 600 to 1500 for transmitting information. And, each unit in the apparatus 1600 for transmitting information and other operations and/or functions described above are respectively for implementing the corresponding flows of the methods 600 to 1500 for transmitting information. The specific process of each unit executing the corresponding steps is described above with reference to the method embodiments of fig. 6 to 15, and is not repeated herein for brevity.

Fig. 17 is a schematic block diagram of an apparatus 1700 for transmitting information according to an embodiment of the present application. As shown in fig. 17, the apparatus 1700 for transmitting information may include: a transceiver unit 1710 and a processing unit 1720.

In one possible design, the device for transmitting information may be a network device or a chip configured with the network device in the methods 600 to 1500.

Specifically, the transceiver 1710 is configured to:

transmitting configuration information of at least one reference signal, the configuration information of the at least one reference signal including configuration information of a first reference signal;

transmitting the first reference signal based on configuration information of the first reference signal;

and sending a first message based on a first transmission relation, wherein the first transmission relation indicates that the first reference signal and the first message have the same or similar spatial characteristic parameters, the first message is used for random access, or the first message is a message before the first receiving of the reference signal configuration information special for the terminal equipment after random access, and the message is carried on a physical downlink shared channel PDSCH or a physical downlink control channel PDCCH for scheduling the PDSCH.

The processing unit 1720 is configured to determine the first reference signal from the plurality of reference signals;

the transceiver 1710 is specifically configured to send first indication information, where the first indication information is used to indicate the identifier of the first reference signal.

the transceiver 1710 is specifically configured to receive second indication information, where the second indication information is used to indicate an identifier of the first reference signal;

the processing unit 1720 is specifically configured to determine the first reference signal according to the second indication information.

It is to be understood that the apparatus 1700 for transmitting information may correspond to network devices in the methods 600 to 1500 for transmitting information according to embodiments of the present application, and the apparatus 1700 for transmitting information may include units for performing the methods performed by the network devices in the methods 600 to 1500 for transmitting information. And, each unit in the apparatus 1700 for transmitting information and the other operations and/or functions described above are respectively for implementing the corresponding flows of the methods 600 to 1500 for transmitting information. The specific process of each unit executing the corresponding steps is described above with reference to the method embodiments of fig. 6 to 15, and is not repeated herein for brevity.

Fig. 18 is a schematic block diagram of a communication apparatus 1800 provided by an embodiment of the present application. The communication device 1800 may be a terminal device as described in fig. 6-15. As shown in fig. 18, the communication device 1800 may include one or more processors 1810 and one or more transceivers 1820, and optionally the communication device may also include one or more memories 1830. The processor 1810 is configured to control the transceiver 1820 to transmit and receive signals, the memory 1830 is configured to store a computer program, and the processor 1810 is configured to invoke and run the computer program from the memory 1830 to perform the methods 600 to 1500 for transmitting information provided herein and the corresponding processes and/or operations performed by the terminal device in the embodiments. For brevity, no further description is provided herein.

For example, the communication apparatus 1800 may be the terminal device 150 shown in fig. 1 or the terminal device 250 shown in fig. 2. For example, the processor 1810 may correspond to the processing unit 1620 in fig. 16, and the transceiver 1820 may correspond to the transceiver unit 1610 shown in fig. 16.

Fig. 19 is a schematic block diagram of a communication apparatus 1900 provided in an embodiment of the present application. The communication apparatus 1900 may be a network device as described in fig. 6 to 15. As shown in fig. 19, the communications device 1900 may include one or more processors 1910 and one or more transceivers 1920, and optionally the communications device may also include one or more memories 1930. The processor 1910 is configured to control the transceiver 1920 to transmit and receive signals, the memory 1930 is configured to store a computer program, and the processor 1910 is configured to call and execute the computer program from the memory 1930 to perform the methods 600 to 1500 for transmitting information provided herein and the corresponding processes and/or operations performed by the terminal device in the embodiments. For brevity, no further description is provided herein.

For example, the processor 1910 may correspond to the processing unit 1720 in fig. 17, and the transceiver 1920 may correspond to the transceiving unit 1710 shown in fig. 17.

Furthermore, the present application provides a computer-readable storage medium having stored therein computer instructions that, when executed on a computer, cause the computer to perform the respective operations and/or flows performed by the terminal device in the methods 600 to 1500 for transmitting information provided herein.

The present application also provides a computer program product comprising computer program code which, when run on a computer, causes the computer to perform the respective operations and/or flows of the methods 600 to 1500 for transmitting information provided herein, which are performed by a terminal device.

The application also provides a chip comprising a processor. The processor is configured to invoke and run a computer program stored in the memory to perform the corresponding operations and/or flows performed by the terminal device in the methods 600-1500 for transmitting information provided herein. Optionally, the chip further comprises a memory, the memory is connected with the processor through a circuit or a wire, and the processor is used for reading and executing the computer program in the memory. Further optionally, the chip further comprises a communication interface, and the processor is connected to the communication interface. The communication interface is used for receiving data and/or information to be processed, and the processor acquires the data and/or information from the communication interface and processes the data and/or information. The communication interface may be an input-output interface.

The present application provides a computer-readable storage medium having stored therein computer instructions that, when executed on a computer, cause the computer to perform the corresponding operations and/or flows of the methods 600 to 1500 for transmitting information provided herein, which are performed by a network device.

The present application also provides a computer program product comprising computer program code which, when run on a computer, causes the computer to perform the respective operations and/or flows of the methods 600 to 1500 for transmitting information provided herein, which are performed by a network device.

The application also provides a chip comprising a processor. The processor is configured to invoke and run a computer program stored in the memory to perform the corresponding operations and/or flows performed by the network device in the methods 600-1500 for transmitting information provided herein. Optionally, the chip further comprises a memory, the memory is connected with the processor through a circuit or a wire, and the processor is used for reading and executing the computer program in the memory. Further optionally, the chip further comprises a communication interface, and the processor is connected to the communication interface. The communication interface is used for receiving data and/or information to be processed, and the processor acquires the data and/or information from the communication interface and processes the data and/or information. The communication interface may be an input-output interface.

Those of ordinary skill in the art will appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware, or combinations of computer software and electronic hardware. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the solution. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present application.

It will be clear to those skilled in the art that, for convenience and brevity of description, specific working procedures of the above-described systems, apparatuses and units may refer to corresponding procedures in the foregoing method embodiments, and are not repeated herein.

In the several embodiments provided in this application, it should be understood that the disclosed systems, devices, and methods may be implemented in other manners. For example, the apparatus embodiments described above are merely illustrative, e.g., the division of the units is merely a logical function division, and there may be additional divisions when actually implemented, e.g., multiple units or components may be combined or integrated into another system, or some features may be omitted or not performed. Alternatively, the coupling or direct coupling or communication connection shown or discussed with each other may be an indirect coupling or communication connection via some interfaces, devices or units, which may be in electrical, mechanical or other form.

The units described as separate units may or may not be physically separate, and units shown as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of 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 application may be integrated in one processing unit, or each unit may exist alone physically, or two or more units may be integrated in one unit.

The functions, if implemented in the form of software functional units and sold or used as a stand-alone product, may be stored in a computer-readable storage medium. Based on such understanding, the technical solution of the present application may be embodied essentially or in a part contributing to the prior art or in a part of the technical solution, in the form of a software product stored in a storage medium, including several instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the methods described in the embodiments of the present application. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a read-only memory (ROM), a random access memory (random access memory, RAM), a magnetic disk, or an optical disk, or other various media capable of storing program codes.

The foregoing is merely specific embodiments of the present application, but the scope of the present application is not limited thereto, and any person skilled in the art can easily think about changes or substitutions within the technical scope of the present application, and the changes and substitutions are intended to be covered by the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims

1. A method of transmitting information, comprising:

and receiving a first message based on a first transmission relation, wherein the first transmission relation indicates that the first reference signal and the first message have the same or similar spatial characteristic parameters, the first message is used for random access, or the first message is a message before the first time of receiving the special reference signal configuration information of the terminal equipment after random access, and the message is carried on a physical downlink shared channel PDSCH or a physical downlink control channel PDCCH for scheduling the PDSCH.

2. The method of claim 1, wherein the configuration information of the at least one reference signal is configuration information of a plurality of reference signals, the configuration information of the plurality of reference signals corresponding to a plurality of reference signals, the plurality of reference signals including the first reference signal, and

the method further comprises the steps of:

and receiving first indication information, wherein the first indication information is used for indicating the identification of the first reference signal.

3. The method of claim 2, wherein the first indication information is carried on a random access response, RAR, in a contention-based four-step random access, a message 4 in a contention-based four-step random access, a message B in a contention-based two-step random access, a PDCCH scheduling the RAR, a PDCCH scheduling the message 4, a PDCCH scheduling the message B, or a PDCCH scheduling a retransmission message 3.

4. The method of claim 1, wherein the configuration information of the at least one reference signal is configuration information of a plurality of reference signals, the configuration information of the plurality of reference signals corresponding to a plurality of reference signals, the plurality of reference signals including the first reference signal, and

the method further comprises the steps of:

determining the first reference signal from the plurality of reference signals;

and sending second indication information, wherein the second indication information is used for indicating the identification of the first reference signal.

5. The method of claim 4, wherein the second indication information is carried on message 3 in a contention-based four-step random access, message a in a contention-based two-step random access, or PDCCH scheduling the message 3.

6. The method of claim 4, wherein the second indication information is a random access preamble in a contention-based four-step random access, the random access preamble having a correspondence with the first reference signal.

7. The method according to any one of claims 1 to 6, wherein the spatial characteristic parameter is one or more of the following: delay spread, doppler shift, average delay, average gain, and spatial reception parameters.

8. The method according to any of claims 1 to 6, wherein the configuration information of the reference signal, the first reference signal is broadcast transmitted periodically.

9. A method of transmitting information, comprising:

transmitting configuration information of at least one reference signal, wherein the configuration information of the at least one reference signal comprises configuration information of a first reference signal;

and sending a first message based on a first transmission relation, wherein the first transmission relation indicates that the first reference signal and the first message have the same or similar spatial characteristic parameters, the first message is used for random access, or the first message is a message before the first time of receiving the special reference signal configuration information of the terminal equipment after random access, and the message is carried on a physical downlink shared channel PDSCH or a physical downlink control channel PDCCH for scheduling the PDSCH.

10. The method of claim 9, wherein the configuration information of the at least one reference signal is configuration information of a plurality of reference signals, the configuration information of the plurality of reference signals corresponding to a plurality of reference signals, the plurality of reference signals including the first reference signal, and

the method further comprises the steps of:

determining the first reference signal from the plurality of reference signals;

and sending first indication information, wherein the first indication information is used for indicating the identification of the first reference signal.

11. The method of claim 10, wherein the first indication information is carried on a random access response, RAR, in a contention-based four-step random access, a message 4 in a contention-based four-step random access, a message B in a contention-based two-step random access, a PDCCH scheduling the RAR, a PDCCH scheduling the message 4, a PDCCH scheduling the message B, or a PDCCH scheduling a retransmission message 3.

12. The method of claim 9, wherein the configuration information of the at least one reference signal is configuration information of a plurality of reference signals, the configuration information of the plurality of reference signals corresponding to a plurality of reference signals, the plurality of reference signals including the first reference signal, and

The method further comprises the steps of:

receiving second indication information, wherein the second indication information is used for indicating the identification of the first reference signal;

and determining the first reference signal according to the second indication information.

13. The method of claim 12, wherein the second indication information is carried on message 3 in a contention-based four-step random access, message a in a contention-based two-step random access, or PDCCH scheduling the message 3.

14. The method of claim 12, wherein the second indication information is a random access preamble in a contention-based four-step random access, the random access preamble having a correspondence with the first reference signal.

15. The method according to any one of claims 9 to 14, wherein the spatial characteristic parameter is one or more of: delay spread, doppler shift, average delay, average gain, and spatial reception parameters.

16. The method according to any of claims 9 to 14, wherein the configuration information of the reference signal, the first reference signal, is broadcast transmitted periodically.

17. An apparatus for transmitting information, comprising:

a transceiver unit for:

18. The apparatus of claim 17, wherein the configuration information of the at least one reference signal is configuration information of a plurality of reference signals, the configuration information of the plurality of reference signals corresponding to a plurality of reference signals, the plurality of reference signals including the first reference signal, and

the transceiver unit is specifically configured to receive first indication information, where the first indication information is used to indicate an identifier of the first reference signal.

19. The apparatus of claim 18, wherein the first indication information is carried on a random access response, RAR, in a contention-based four-step random access, a message 4 in a contention-based four-step random access, a message B in a contention-based two-step random access, a PDCCH scheduling the RAR, a PDCCH scheduling the message 4, a PDCCH scheduling the message B, or a PDCCH scheduling a retransmission message 3.

20. The apparatus of claim 17, wherein the configuration information of the at least one reference signal is configuration information of a plurality of reference signals, the configuration information of the plurality of reference signals corresponding to a plurality of reference signals, the plurality of reference signals including the first reference signal, and

the apparatus further comprises: the processing unit is used for processing the processed data,

the processing unit is configured to determine the first reference signal from the plurality of reference signals;

the transceiver unit is specifically configured to send second indication information, where the second indication information is used to indicate the identifier of the first reference signal.

21. The apparatus of claim 20, wherein the second indication information is carried on message 3 in a contention-based four-step random access, message a in a contention-based two-step random access, or PDCCH scheduling the message 3.

22. The apparatus of claim 20, wherein the second indication information is a random access preamble in a contention-based four-step random access, the random access preamble having a correspondence with the first reference signal.

23. The apparatus of any one of claims 17 to 22, wherein the spatial characteristic parameter is one or more of: delay spread, doppler shift, average delay, average gain, and spatial reception parameters.

24. The apparatus according to any of claims 17 to 22, wherein the configuration information of the reference signal, the first reference signal, is broadcast transmitted periodically.

25. An apparatus for transmitting information, comprising:

a transceiver unit for:

26. The apparatus of claim 25, wherein the configuration information of the at least one reference signal is configuration information of a plurality of reference signals, the configuration information of the plurality of reference signals corresponding to a plurality of reference signals, the plurality of reference signals including the first reference signal, and

the transceiver unit is specifically configured to send first indication information, where the first indication information is used to indicate an identifier of the first reference signal.

27. The apparatus of claim 26, wherein the first indication information is carried on a random access response, RAR, in a contention-based four-step random access, a message 4 in a contention-based four-step random access, a message B in a contention-based two-step random access, a PDCCH scheduling the RAR, a PDCCH scheduling the message 4, a PDCCH scheduling the message B, or a PDCCH scheduling a retransmission message 3.

28. The apparatus of claim 25, wherein the configuration information of the at least one reference signal is configuration information of a plurality of reference signals, the configuration information of the plurality of reference signals corresponding to a plurality of reference signals, the plurality of reference signals including the first reference signal, and

The receiving and transmitting unit is specifically configured to receive second indication information, where the second indication information is used to indicate an identifier of the first reference signal;

the processing unit is specifically configured to determine the first reference signal according to the second indication information.

29. The apparatus of claim 28, wherein the second indication information is carried on message 3 in a contention-based four-step random access, message a in a contention-based two-step random access, or PDCCH scheduling the message 3.

30. The apparatus of claim 28, wherein the second indication information is a random access preamble in a contention-based four-step random access, the random access preamble having a correspondence with the first reference signal.

31. The apparatus of any one of claims 25 to 30, wherein the spatial characteristic parameter is one or more of: delay spread, doppler shift, average delay, average gain, and spatial reception parameters.

32. The apparatus according to any one of claims 25 to 30, wherein the configuration information of the reference signal, the first reference signal, is broadcast transmitted periodically.

33. A communication device comprising at least one processor for executing a computer program stored in a memory, causing the communication device to perform the method of any one of claims 1 to 8 or to perform the method of any one of claims 9 to 16.

34. A computer-readable storage medium storing computer-executable instructions that, when run on a computer, cause the computer to perform the method of any one of claims 1 to 8 or to perform the method of any one of claims 9 to 16.