CN116584059A - Communication method, device and system for a reference signal - Google Patents

Abstract

The embodiment of the application provides a communication method, a device and a system of a reference signal, wherein the method comprises the following steps: the method comprises the steps that terminal equipment receives a first message sent by network equipment, wherein the first message comprises at least one of a system information block 1, a message 2 and a message 4; determining resource allocation of a channel state information reference signal (CSI-RS) according to the first message; and receiving the CSI-RS sent by the network equipment according to the resource configuration. By adopting the application, the resource allocation of the CSI-RS is completed through the association information of the first message, the resource allocation overhead of the CSI-RS is reduced, and the communication performance is improved.

Description

Communication method, device and system for a reference signal technical field

The present application relates to the field of communication technologies, and in particular to a communication method, device and system for a reference signal.

Background technique

In order to improve the transmission performance, the communication between the base station and the terminal equipment can use multi-antenna technology to send and receive signals towards a specific spatial direction (spatial channel). Since the gains in different spatial directions are different, a beam pattern (beam pattern) can be used to describe the gain in space, referred to as a beam. Taking downlink communication as an example, the base station sends in a specific direction, and the terminal device receives in a specific direction. Only when the sending and receiving directions are aligned, can a relatively high communication efficiency be achieved. According to the protocol framework of the 3rd generation partnership project (3GPP) R15, the beam alignment between the base station and the terminal equipment needs to rely on uplink or downlink reference signals and corresponding channel information feedback, such as precoding Vector, channel quality indicator (channel quality indicator, CQI), precoding matrix index (precoding matrix indicator, PMI), rank index (rank index, RI), etc. After the base station obtains the channel state information (channel state information, CSI) information, it can schedule the modulation and coding scheme (modulation and coding scheme, MCS), allocate resource blocks (resource block, RB) and perform beamforming according to the channel quality to increase the rate . Among them, the downlink reference signal mainly includes synchronization signal/physical broadcast channel block (SSB), channel state information reference signal (channel state information reference signal, CSI-RS), tracking reference signal (tracking reference signal, TRS ).

In the random access process of the current protocol, uplink and downlink receiving beams and transmitting beams are determined based on the SSB. However, the number of SSBs supported by the current protocol is relatively small, so a relatively wide beam is often used to achieve coverage of the entire cell, resulting in low gain. In addition, the beam alignment based on CSI-RS in the current protocol needs to increase the resource configuration overhead of CSI-RS after random access, resulting in poor communication performance.

Contents of the invention

The present application provides a reference signal communication method, device and system, which reduce resource configuration overhead of CSI-RS and improve communication performance.

In the first aspect, the embodiment of the present application provides a reference signal communication method, which can be applied to a terminal device, or a component in a terminal device, such as a chip, a processor, etc., and the method includes: receiving the first message, the first message includes at least one of system information block No. 1, message 2, and message 4; according to the first message, determine the resource configuration of the channel state information reference signal CSI-RS; according to the resource configuration, Receive the CSI-RS sent by the network device. The resource configuration of the CSI-RS is determined through the first message, which reduces the resource configuration overhead of the CSI-RS and improves communication performance.

In a possible design, the first message and the CSI-RS are sent together, and by sending the first message and the CSI-RS together, the terminal device can determine the resource configuration of the CSI-RS through the first message, reducing Incoming delay.

In another possible design, the terminal device is based on the physical downlink control channel PDCCH associated with the first message, the physical downlink shared channel PDSCH associated with the first message, the control resource set of the PDCCH associated with the first message, the At least one of the search space of the PDCCH, the physical cell identity associated with the first message, and the index of the synchronization signal block SSB associated with the first message determines the resource configuration of the CSI-RS. The resource configuration of the CSI-RS is determined through the association information of the first message, which reduces the resource configuration overhead of the CSI-RS, and reduces the time delay for terminal device access and subsequent data transmission.

In another possible design, the resource configuration of the CSI-RS is based on the physical downlink control channel PDCCH associated with the first message, the physical downlink shared channel PDSCH associated with the first message, the control resource set of the PDCCH associated with the first message, The search space of the PDCCH associated with the first message, the physical cell identifier associated with the first message, and the index of the synchronization signal block SSB associated with the first message are determined by at least one item. The resource configuration of the CSI-RS is determined through the association information of the first message, which reduces the resource configuration overhead of the CSI-RS.

In another possible design, the terminal device is based on the maximum possible number of synchronization signal blocks SSB associated with the first message, the time domain position of the synchronization signal block SSB associated with the first message, the number of SSBs associated with the first message, the At least one of the carrier frequency range associated with the first message, the bandwidth of the search space of the PDCCH associated with the first message, the random access response RAR protocol data packet PDU carried by the PDCCH associated with the first message and the PDSCH associated with the first message , to determine the number of ports corresponding to the CSI-RS. The number of ports corresponding to the CSI-RS is determined through the association information of the first message, thereby reducing resource configuration overhead of the CSI-RS.

In another possible design, the number of ports corresponding to the CSI-RS is based on the maximum possible number of synchronization signal blocks SSB associated with the first message, the time domain position of the synchronization signal block SSB associated with the first message, the first message association The number of SSBs associated with the first message, the carrier frequency range associated with the first message, the bandwidth of the search space of the PDCCH associated with the first message, the random access response RAR protocol data message carried by the PDCCH associated with the first message and the PDSCH associated with the first message At least one item in the PDU is determined. The number of ports corresponding to the CSI-RS is determined through the association information of the first message, thereby reducing resource configuration overhead of the CSI-RS.

In another possible design, the terminal device determines the frequency domain of the CSI-RS according to at least one of the bandwidth of the search space of the PDCCH associated with the first message, the PDCCH associated with the first message, and the PDSCH associated with the first message The number of resource blocks RB. The number of RBs in the frequency domain of the CSI-RS is determined through the association information of the first message, which reduces resource configuration overhead of the CSI-RS.

In another possible design, the number of frequency domain resource blocks RB of CSI-RS is at least according to the bandwidth of the search space of the PDCCH associated with the first message, the PDCCH associated with the first message, and the PDSCH associated with the first message One sure thing. The number of RBs in the frequency domain of the CSI-RS is determined through the association information of the first message, which reduces the resource configuration overhead of the CSI-RS and reduces the time delay of random access.

In another possible design, the terminal device is based on the start position of the PDCCH control resource set associated with the first message, the start position of the PDCCH associated with the first message, the end position of the PDCCH associated with the first message, the At least one of the start position of the associated PDSCH and the end position of the PDSCH associated with the first message determines the start position of the RB in the frequency domain of the CSI-RS. The starting position of the RB in the frequency domain of the CSI-RS is determined through the association information of the first message, thereby reducing resource configuration overhead of the CSI-RS.

In another possible design, the starting position of the frequency domain RB of the CSI-RS is the starting position of the control resource set of the PDCCH associated with the first message, the starting position of the PDCCH associated with the first message, the first The end position of the PDCCH associated with the message, the start position of the PDSCH associated with the first message, and the end position of the PDSCH associated with the first message are determined by at least one item. The starting position of the RB in the frequency domain of the CSI-RS is determined through the association information of the first message, thereby reducing resource configuration overhead of the CSI-RS.

In another possible design, the terminal device determines the frequency domain allocation of the CSI-RS according to at least one of the physical cell identity associated with the first message and the SSB index associated with the first message. The frequency domain allocation of the CSI-RS is determined through the association information of the first message, which reduces the resource configuration overhead of the CSI-RS.

In another possible design, the frequency domain allocation of the CSI-RS is determined according to at least one of the physical cell identity associated with the first message and the SSB index associated with the first message. The frequency domain allocation of the CSI-RS is determined through the association information of the first message, which reduces the resource configuration overhead of the CSI-RS.

In another possible design, the terminal device associates the SSB index associated with the first message, the physical cell identity associated with the first message, the time slot index of the PDCCH control resource set associated with the first message, and the The index of the PDCCH time slot, the index of the PDSCH time slot associated with the first message, the index of the start or end OFDM symbol of the PDCCH control resource set associated with the first message, and the time of the CSI-RS The index of the slot, the index of the start or end OFDM symbol of the PDCCH associated with the first message, the index of the start or end OFDM symbol of the PDSCH associated with the first message, the index of the OFDM symbol where the CSI-RS is located, and the corresponding CSI-RS At least one item in the number of ports determines the sequence corresponding to the CSI-RS. The sequence corresponding to the CSI-RS is determined through the association information of the first message, which reduces the resource configuration overhead of the CSI-RS.

In another possible design, the sequence corresponding to the CSI-RS is based on the index of the SSB associated with the first message, the physical cell identifier associated with the first message, and the index of the time slot of the PDCCH control resource set associated with the first message , the index of the time slot of the PDCCH associated with the first message, the index of the time slot of the PDSCH associated with the first message, the index of the starting or ending OFDM symbol of the PDCCH control resource set associated with the first message, The index of the time slot where the CSI-RS is located, the index of the start or end OFDM symbol of the PDCCH associated with the first message, the index of the start or end OFDM symbol of the PDSCH associated with the first message, the index of the OFDM symbol where the CSI-RS is located, Determined by at least one of the port numbers corresponding to the CSI-RS. The sequence corresponding to the CSI-RS is determined through the association information of the first message, which reduces the resource configuration overhead of the CSI-RS.

In another possible design, in addition to determining the sequence corresponding to the CSI-RS according to the above information, the terminal device may also use the random access radio network temporary identifier RA-RNTI associated with the first message, the random access radio network temporary identifier RA-RNTI associated with the first message, and the random The index of the time slot of the access opportunity, the index of the frequency of the random access opportunity associated with the first message, the index of the carrier where the random access opportunity associated with the first message is located, and the part where the random access opportunity associated with the first message is located At least one of the index of the bandwidth BWP and the index of the starting OFDM symbol of the random access opportunity associated with the first message determines the sequence corresponding to the CSI-RS. The sequence corresponding to the CSI-RS is determined through the association information of the first message, which reduces the resource configuration overhead of the CSI-RS and reduces the time delay of random access.

In another possible design, the terminal device may combine the above two kinds of information to determine the sequence corresponding to the CSI-RS.

In another possible design, the sequence corresponding to the CSI-RS is the random access radio network temporary identifier RA-RNTI associated with the first message, the index of the time slot of the random access opportunity associated with the first message, the first The index of the frequency of the random access opportunity associated with the message, the index of the carrier where the random access opportunity associated with the first message is located, the index of the partial bandwidth BWP where the random access opportunity associated with the first message is located, the random access opportunity associated with the first message at least one of the index of the starting OFDM symbol of the access opportunity is determined. The sequence corresponding to the CSI-RS is determined through the association information of the first message, which reduces the resource configuration overhead of the CSI-RS.

In another possible design, before the terminal device receives the first message sent by the network device, the terminal device sends a second message to the network device, and the second message includes at least the index of the synchronization signal block SSB and the CSI-RS request information One item, at least one item of the SSB index and the CSI-RS request information is used to instruct the network device to send the CSI-RS in the sending time slot of the first message. The SSB index and the CSI-RS request information instruct the network device to send the first message and the CSI-RS together, so as to complete the resource configuration of the CSI-RS according to the first message, thereby reducing the configuration overhead of the CSI-RS.

In another possible design, the resource configuration of the CSI-RS includes at least one of the following: resource mapping parameters, sequence generation parameters, period and time slot position.

In the second aspect, the embodiment of the present application provides a communication method of a reference signal, which can be applied to a network device, or a component in a network device, such as a chip, a processor, etc. The method includes: determining the channel according to the first message The resource configuration of the state information reference signal CSI-RS, the first message includes at least one of system information block No. 1, message 2 and message 4; sending the first message and the CSI-RS to the terminal device. The resource configuration of the CSI-RS is determined through the first message, which reduces the resource configuration overhead of the CSI-RS and improves communication performance.

In a possible design, the first message and the CSI-RS are sent together, and by sending the first message and the CSI-RS together, the terminal device can determine the resource configuration of the CSI-RS through the first message, reducing Incoming delay.

In another possible design, the network device, according to the physical downlink control channel PDCCH associated with the first message, the physical downlink shared channel PDSCH associated with the first message, the control resource set of the PDCCH associated with the first message, the At least one of the search space of the PDCCH, the physical cell identity associated with the first message, and the index of the synchronization signal block SSB associated with the first message determines the resource configuration of the CSI-RS. The resource configuration of the CSI-RS is determined through the association information of the first message, which reduces the resource configuration overhead of the CSI-RS, and reduces the time delay for terminal device access and subsequent data transmission.

In another possible design, the network device is based on the maximum possible number of synchronization signal blocks SSB associated with the first message, the time domain position of the synchronization signal block SSB associated with the first message, the number of SSBs associated with the first message, the At least one of the carrier frequency range associated with the first message, the bandwidth of the search space of the PDCCH associated with the first message, the random access response RAR protocol data packet PDU carried by the PDCCH associated with the first message and the PDSCH associated with the first message , to determine the number of ports corresponding to the CSI-RS. The number of ports corresponding to the CSI-RS is determined through the association information of the first message, thereby reducing resource configuration overhead of the CSI-RS.

In another possible design, the network device determines the frequency domain of the CSI-RS according to at least one of the bandwidth of the search space of the PDCCH associated with the first message, the PDCCH associated with the first message, and the PDSCH associated with the first message The number of resource blocks RB. The number of RBs in the frequency domain of the CSI-RS is determined through the association information of the first message, which reduces resource configuration overhead of the CSI-RS.

In another possible design, the network device according to the start position of the PDCCH control resource set associated with the first message, the start position of the PDCCH associated with the first message, the end position of the PDCCH associated with the first message, the first message At least one of the start position of the associated PDSCH and the end position of the PDSCH associated with the first message determines the start position of the RB in the frequency domain of the CSI-RS. The starting position of the RB in the frequency domain of the CSI-RS is determined through the association information of the first message, thereby reducing resource configuration overhead of the CSI-RS.

In another possible design, the network device determines the frequency domain allocation of the CSI-RS according to at least one of the physical cell identity associated with the first message and the SSB index associated with the first message. The frequency domain allocation of the CSI-RS is determined through the association information of the first message, which reduces the resource configuration overhead of the CSI-RS.

In another possible design, the network device associates the SSB index associated with the first message, the physical cell identity associated with the first message, the time slot index of the PDCCH control resource set associated with the first message, and the The index of the PDCCH time slot, the index of the PDSCH time slot associated with the first message, the index of the start or end OFDM symbol of the PDCCH control resource set associated with the first message, and the time of the CSI-RS The index of the slot, the index of the start or end OFDM symbol of the PDCCH associated with the first message, the index of the start or end OFDM symbol of the PDSCH associated with the first message, the index of the OFDM symbol where the CSI-RS is located, and the corresponding CSI-RS At least one of the number of ports determines the sequence of the CSI-RS. The sequence corresponding to the CSI-RS is determined through the association information of the first message, which reduces the resource configuration overhead of the CSI-RS.

In another possible design, the network device uses the random access radio network temporary identifier RA-RNTI associated with the first message, the index of the time slot of the random access opportunity associated with the first message, and the random access opportunity associated with the first message. The frequency index of the random access opportunity associated with the first message, the index of the carrier where the random access opportunity associated with the first message is located, the index of the partial bandwidth BWP where the random access opportunity associated with the first message is located, the starting point of the random access opportunity associated with the first message At least one item of the index of the first OFDM symbol determines the sequence of the CSI-RS. The sequence corresponding to the CSI-RS is determined through the association information of the first message, which reduces the resource configuration overhead of the CSI-RS.

In another possible design, before the network device sends the first message together with the channel state information reference signal CSI-RS to the terminal device, the network device receives the second message sent by the terminal device, and the second message includes the synchronization signal block SSB At least one of the index and the CSI-RS request information; according to at least one of the SSB index and the CSI-RS request information, determine to send the CSI-RS in the sending time slot of the first message. The SSB index and the CSI-RS request information instruct the network device to send the first message and the CSI-RS together, so as to complete the resource configuration of the CSI-RS according to the first message, thereby reducing the configuration overhead of the CSI-RS.

In another possible design, the resource configuration of the CSI-RS includes at least one of the following: resource mapping parameters, sequence generation parameters, period and time slot position.

In another possible design, the resource mapping parameters of the CSI-RS include at least one of the following: number of ports, frequency domain density, starting position of frequency domain RBs, number of frequency domain RBs, frequency domain allocation, time Domain start position and code division multiplexing type.

In the third aspect, the embodiment of the present application provides a communication device. The first communication device is configured to implement the method and function performed by the terminal device in the first aspect above, and is implemented by hardware/software, and the hardware/software includes the same Modules corresponding to the above functions.

In a fourth aspect, an embodiment of the present application provides a communication device, the second communication device is configured to implement the method and function performed by the network device in the second aspect above, and is implemented by hardware/software, and the hardware/software includes the same Modules corresponding to the above functions.

In a fifth aspect, the present application provides a communication device. The device may be a terminal device, or a device in the terminal device, or a device that can be matched with the terminal device. Wherein, the communication device may also be a system on a chip. The communication device can execute the method described in the first aspect. The functions of the communication device may be realized by hardware, or may be realized by executing corresponding software by hardware. The hardware or software includes one or more modules corresponding to the above functions. This module can be software and/or hardware. For the operations and beneficial effects performed by the communication device, reference can be made to the method and beneficial effects described in the first aspect above, and repeated descriptions will not be repeated.

In a sixth aspect, the present application provides a communication device. The device may be a network device, or a device in the network device, or a device that can be matched with the network device. Wherein, the communication device may also be a system on a chip. The communication device can execute the method described in the second aspect. The functions of the communication device may be realized by hardware, or may be realized by executing corresponding software by hardware. The hardware or software includes one or more modules corresponding to the above functions. This module can be software and/or hardware. For operations and beneficial effects performed by the communication device, reference may be made to the method and beneficial effects described in the second aspect above, and repeated descriptions will not be repeated.

In the seventh aspect, the present application provides a communication device, the communication device includes a processor, and when the processor calls the computer program in the memory, the method described in any one of the first aspect and the second aspect be executed.

In an eighth aspect, the present application provides a communication device, the communication device includes a processor and a memory, the memory is used to store computer-executable instructions; the processor is used to execute the computer-executable instructions stored in the memory, to The communication device is made to execute the method according to any one of the first aspect and the second aspect.

In a ninth aspect, the present application provides a communication device, the communication device includes a processor, a memory, and a transceiver, the transceiver is used to receive a channel or signal, or send a channel or signal; the memory is used to storing program code; the processor is configured to call the program code from the memory to execute the method according to any one of the first aspect and the second aspect.

In a tenth aspect, the present application provides a communication device, the communication device includes a processor and an interface circuit, the interface circuit is used to receive code instructions and transmit them to the processor; the processor runs the code instructions Instructions to perform the method described in any one of the first aspect and the second aspect.

In an eleventh aspect, the present application provides a computer-readable storage medium, the computer-readable storage medium is used to store instructions, when the instructions are executed, so that any one of the first aspect and the second aspect The method described is implemented.

In a twelfth aspect, the present application provides a computer program product including instructions, when the instructions are executed, the method according to any one of the first aspect and the second aspect is implemented.

In a thirteenth aspect, the embodiment of the present application provides a communication system, the communication system includes at least one terminal device and at least one network device, the terminal device is used to perform the steps in the above first aspect, and the network device is used to perform The steps in the second aspect above.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiment of the present application or the background art, the following will describe the drawings that need to be used in the embodiment of the present application or the background art.

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

Fig. 2 is a flow chart of a random access process;

FIG. 3 is a schematic diagram of an association relationship between an SSB and a random access opportunity or preamble;

FIG. 4 is a flow chart of downlink beam management based on CSI-RS;

FIG. 5 is a schematic diagram of a resource mapping manner;

FIG. 6 is a flow chart of a communication method for a reference signal provided in an embodiment of the present application;

FIG. 7 is a flow chart of another reference signal communication method provided by an embodiment of the present application;

FIG. 8 is a flow chart of another reference signal communication method provided by an embodiment of the present application;

FIG. 9 is a flow chart of another reference signal communication method provided by an embodiment of the present application;

FIG. 10 is a schematic structural diagram of a communication device provided by an embodiment of the present application;

Fig. 11 is a schematic structural diagram of a communication device provided by an embodiment of the present application;

FIG. 12 is a schematic structural diagram of a terminal device provided by an embodiment of the present application;

FIG. 13 is a schematic structural diagram of a network device proposed by an embodiment of the present application.

Detailed ways

Embodiments of the present application are described below with reference to the drawings in the embodiments of the present application.

As shown in FIG. 1 , FIG. 1 is a schematic structural diagram of a communication system 100 provided in an embodiment of the present application. The communication system 100 may include a network device 110 and terminal devices 101 - 106 . It should be understood that more or less network devices or terminal devices may be included in the communication system 100 to which the method of the embodiment of the present application can be applied. A network device or a terminal device may be hardware, or functionally divided software, or a combination of the above two. Network devices and terminal devices can communicate through other devices or network elements. In the communication system 100 , the network device 110 can send downlink data to the terminal devices 101 - 106 . Of course, the terminal devices 101 - 106 may also send uplink data to the network device 110 . Terminal devices 101 to 106 are not limited to mobile phones, but may also be various IoT devices, such as automobiles, speakers, computers, tablets, home appliances, and modules used in various industries. The devices used for wireless communication in the future are called terminal devices. The communication system 100 may adopt public land mobile network (public land mobile network, PLMN), vehicle networking (vehicle to everything, V2X), device-to-device (device-to-device, D2D) network, machine-to-machine (machine to machine, M2M) network, Internet of Things (IoT) or other networks. In addition, the terminal device 104 to the terminal device 106 may also form a communication system. In the communication system, the terminal device 105 can send downlink data to the terminal device 104 or the terminal device 106 . The method in the embodiment of the present application may be applied to the communication system 100 shown in FIG. 1 .

Key terms relevant to this application are introduced below:

Random access (random access, RA): In a communication system with access control in long term evolution (long term evolution, LTE) or fifth-generation mobile communication technology (5-Generation, 5G), it is used for non-accessed network An information exchange mechanism for establishing a connection between a terminal device and a network device. Since the random access process is carried by a random access channel (RACH), RA and RACH are often used together in protocols and spoken language. It is divided into contention-based random access and non-contention-based random access. The contention-based random access is generally divided into four steps, and each step corresponds to a message, including message 1, message 2, message 3, and message 4, which carry different signaling or information respectively. Random access based on non-contention only has the first two steps. In addition, in order to reduce the access time of 4-step contention-based random access, 2-step random access can be performed. In 2-step random access, it consists of message A and message B, where message A includes the preamble and the first data information (for example, similar to message 1 and message 3 in 4-step random access), and message B Including contention resolution and uplink scheduling (for example, similar to message 2 and message 4 in 4-step random access).

Random access opportunity: Random access opportunity is also called random access resource (RACH resource) and random access opportunity (RACH occasion/RACH transmission occasion/RACH opportunity/RACH chance, RO), which refers to the resource used to carry one or more The time and frequency resources of a random access preamble. Logically, one random access opportunity is used to carry information/signals of a physical random access channel (physical random access channel, PRACH). Sometimes it is also called equivalently physical random access opportunity (PRACH occasion, RO) and physical random access resource (PRACH resource).

Message 1 (message 1, Msg1): that is, a random access preamble (preamble or sequence), carried by a physical random access channel (physical random access channel, PRACH). It is usually used to initiate connection requests, handover requests, synchronization requests, and scheduling requests between terminal devices and network devices.

Message 2 (message 2, Msg2): also called a random access response (random access response, RAR) message. It is the reply of the network side to the received message 1, and multiple Msg1s can be replied in one message 2. For a single random access preamble, there is a specific random access response message in the media access control (MAC). However, the base station usually encapsulates the responses of all random access preambles detected on a random access opportunity to form a Msg2. That is, after the terminal device sends the random access preamble, it searches the corresponding message 2 for the random access response message corresponding to the random access preamble sent by itself, and ignores the response messages for other random access preambles.

If the network side receives message 1, at least one of the following information is encapsulated into a random access response (random access response, RAR) and sent: index of message 1 (random access preamble identity, RAPID), uplink scheduling authorization (uplink grant) , timing advance, temporary cell radio network temporary identity (temporary cell radio network temporary identity, TC-RNTI), etc. The network side can respond to multiple Msg1s in the same Msg2 at the same time, that is, multiple RARs are included.

Message 3 (message 3, Msg3): also known as the first uplink scheduled transmission, is the scheduled transmission of the uplink grant (UL grant) in message 2, or the downlink control information (DCI) scrambled by TC-RNTI ) scheduled retransmissions. The transmission content of Msg3 is a high-level message, such as a connection establishment request message (specifically, it may be the identification information of the user who initiates the connection request). The purpose of this message is to resolve contention. If multiple different devices use the same Msg1 for random access, Msg3 and Msg4 can jointly determine whether there is a conflict. The transmission of message 3 includes retransmission and power control, that is, there is power control information in the UL grant that schedules initial transmission or retransmission.

Message 4 (message 4, Msg4): used for contention resolution. Usually contains the CCCH common control channel (common control channel, CCCH) service data unit (service data unit, SDU) carried in the message 3, if the terminal device detects the CCCH SDU sent by itself in the message 4, it is considered that the contention random access If successful, proceed to the next communication process. Message 4 has retransmission, that is, there is corresponding physical uplink control channel (physical uplink control channel, PUCCH) transmission feedback information. For example, whether message 4 is successfully detected, the terminal device has power control for sending feedback information on the PUCCH.

Transmit power, also known as output power. It can be defined as the output power measured on all or part of the supported frequencies or frequency bands or bandwidths within a given time and/or period. For example, the measurement time is at least 1 ms, and another example is at least one time slot corresponding to a certain subcarrier interval. In one embodiment, power acquired with a measurement time of at least 1 ms is used.

Precoding and codebook: use multiple input multiple output (MIMO) technology to increase system capacity and improve throughput. The mathematical expression is y=Hx+n, where y is a received signal, H is a MIMO channel, x is a transmitted signal, and n is noise. In a communication system with multiple antennas, the signals of multiple transmitting antennas will be superimposed on any receiving antenna, so the method of transmitting signals at the transmitting end affects the performance of the system, and it is often complicated when the receiving end restores the transmitted signal. In this context, on the one hand, precoding is used to reduce system overhead and maximize MIMO system capacity. On the other hand, it is used to reduce the complexity of implementing the receiver to eliminate the influence between channels. At this time, the mathematical expression is y=HPx+n, and P is a precoding matrix (or vector). In order to simplify the implementation complexity, P can be selected from a predefined matrix (or vector) set, which is called a codebook (codebook), and this method is also called a codebook-based transmission method. If the sender can know all the information of H, then P can be obtained by the sender itself. This method is also called the non-codebook sending method (Non-codebook, NCB).

There are two types of precoding: open-loop or closed-loop. In the open-loop mode, the sender determines the precoding codebook to be sent by itself. In the closed-loop mode, the transmitting end determines the precoding codebook to be transmitted based on the feedback information or indication information of the receiving end.

Modulation and demodulation: Modulation is the process of processing the information of the signal source and adding it to the carrier to make it into a form suitable for channel transmission. Different modes correspond to different modulation methods, such as multi-carrier modulation or single-carrier modulation, quadrature amplitude modulation (QAM), pulse amplitude modulation (PAM), phase shift keying (phase shift keying (PSK) modulation, amplitude shift keying (ASK) modulation, and the like. Demodulation is the inverse of modulation, recovering the original data bits or symbols from the signal. Demodulation can also sometimes be called detection.

Orthogonal frequency division multiplexing (OFDM): It is a multi-carrier transmission waveform of frequency division multiplexing, and each signal (also called each carrier/subcarrier) participating in the multiplexing is orthogonal . OFDM technology converts high-speed data streams into multiple parallel low-speed data streams through serial/parallel conversion, and then distributes them to several subcarriers of different frequencies for transmission. OFDM technology utilizes subcarriers that are orthogonal to each other, so that the frequency spectrums of the subcarriers overlap. In the traditional FDM multi-carrier modulation system, a guard interval is required between subcarriers. Compared with it, the OFDM technology greatly improves the spectrum utilization.

Discrete fourier transformation spreading OFDM (DFT-s-OFDM): It is a derivative technology based on OFDM. Intuitively, the subcarriers used by each user are processed by DFT, converted from the time domain to the frequency domain, and then the frequency domain signals of each user are OFDM modulated (that is, input to the IFFT module), so that each user’s The signals are converted to the time domain together and sent. After the improvement of DFT, the signal returns from the frequency domain signal (traditional OFDM) to the time domain signal (same as the single carrier system). Because in this technology, the modulated signal waveform is similar to a single carrier, some people regard it as a single carrier technology, although it is evolved from OFDM technology.

Reference signal (reference signal, RS): also known as demodulation reference signal (demodulation reference signal, DMRS), channel state information reference signal (channel state information reference signal, CSI-RS), phase tracking reference signal (phase tracking reference signal , PTRS), channel sounding reference signal (sounding reference signal, SRS) and so on. It means that the sending end or the receiving end knows or can infer according to predetermined rules: the time and frequency position of the signal, and the signal/symbol carried on the time and frequency. The reference signal is used to obtain a known signal affected by the outside world (eg, spatial channel, device non-ideality) during transmission, and is generally used for channel estimation, auxiliary signal demodulation, and detection. For example, DMRS and CSI-RS are used to obtain channel information, and PTRS is used to obtain phase change information.

Resource block (resource block, RB): also called a physical resource block (physical resource block), is a basic unit of frequency resources in an OFDM-based communication system. A resource block generally consists of N resource elements (resource elements, REs), and a resource element is also called a subcarrier. Wherein, N is generally 12. Several resource blocks form a resource block group (resource block group, RBG), or also called a physical resource block group. Generally, precoding is performed in units of resource blocks or resource block groups, and the basic unit for performing precoding transmission is also called a precoding resource block group (precoding resource block group, PRG)). One precoding resource group may not be smaller than one resource block group.

Layer: The complex symbols (modulation symbols) obtained after scrambling and modulation of 1 or 2 codewords are mapped to one or more transmission layers. , also commonly referred to as layer). The transport layer is usually mapped to an antenna port and is therefore also called an antenna port. Each layer corresponds to a valid data stream. The number of transmission layers, that is, the number of layers is called "transmission order" or "transmission rank". The transmission rank can be changed dynamically. The number of layers must be less than or equal to the minimum value of the number of transmit antenna ports and the number of receive antenna ports, that is, "layer number ≤ min (number of transmit antenna ports, number of receive antenna ports)". In the uplink communication of NR, the number of transmission layers is generally less than or equal to the number of antenna ports, and the number of data antenna ports is consistent with the number of configured SRS ports.

Quasi co-location (quasi co-location, QCL): The QCL relationship is used to indicate that multiple resources have one or more identical or similar communication features. For multiple resources with a quasi co-location relationship, the same or Similar communication configuration. Specifically, the signals corresponding to the antenna ports having a QCL relationship have the same parameters, or the parameters of one antenna port (also referred to as QCL parameters) can be used to determine the parameters of another antenna port having a QCL relationship with the antenna port. parameter, or, the two antenna ports have the same parameter, or, the parameter difference between the two antenna ports is smaller than a certain threshold. Wherein, the parameters may include one or more of the following: delay spread (delay spread), Doppler spread (doppler spread), Doppler frequency shift (doppler shift), average delay (average delay), average Gain, spatial Rx parameters. Wherein, the space reception parameters may include one or more of the following: angle of arrival (angle of arrival, AOA), average AOA, AOA extension, angle of departure (angle of departure, AOD), average angle of departure AOD, AOD extension, reception Antenna spatial correlation parameters, transmitting antenna spatial correlation parameters, transmitting beams, receiving beams, and resource identifiers.

In the embodiment of the present application, UE is used as a terminal device and a base station is used as a network device to describe the technical solution of the present application, which will not be described in detail below.

As shown in Figure 2, Figure 2 is a flowchart of a random access process, which mainly includes the following steps:

S201, the base station broadcasts a synchronization signal and system information at a specific location. In NR, the synchronization signal sent by the base station is called SSB, and the SSB and system information are sent periodically by the base station according to the configuration. The time domain position of the synchronization signal block SSB is indicated by high-level signaling, and the actual transmitted SSB or the number of transmitted SSBs can be determined according to the time domain position of the synchronization signal block SSB. For example, the number of SSBs sent by the base station within half a system frame time (generally refers to the number in the time domain, and may be more in the frequency domain) can be obtained according to the index of the SSB sent within half a system frame (eg, 5 ms).

After the UE is turned on or when it needs to re-connect to the network, it scans the synchronization signal of the base station, performs downlink time and frequency synchronization, and obtains a master system information block (master information block, MIB) from the SSB at the same time. MIB can indicate the search space of the control channel (physical downlink control channel, PDCCH) corresponding to No. 1 system information block (system information block 1, SIB1), also known as common search space (common search space, CSS) and control resource set information (control resource set, CORESET). Then, according to the PDCCH CSS and CORESET associated with SIB1, the system information block No. 1 is received, wherein the system information block No. 1 carries configuration information of random access resources.

S202, the UE selects a random access resource associated with the SSB according to the random access resource configuration information and the synchronized SSB, the random access resource includes time, frequency resources and code domain resources (random access preamble preamble), and The random access resource is used to send a random access signal, which is also called message 1 (Msg1). In NR, through the association between the SSB and the random access resource, the base station can acquire the downlink beam for sending the message 2 (Msg2) and/or after detecting the random access preamble.

As shown in FIG. 3 , FIG. 3 is a schematic diagram of an association relationship between an SSB and a random access opportunity or preamble. The left picture shows that multiple SSBs are associated with the same random access opportunity, and the SSBs are distinguished through the random access preamble; the right picture shows that one SSB is associated with multiple random access opportunities.

S203. After receiving the message 1 sent by the UE, the base station estimates the timing advance of the UE according to the preamble sent by the user, and replies to the user with a message 2 (Msg2). The message 2 includes the information used by the UE to send a message 3 (Msg3) for collision Solved configuration information such as time-frequency resource location, modulation and coding method, etc. A random access response (random access response, RAR) may be referred to as message 2 at both the physical layer and the MAC layer. However, at the physical layer, RAR is generally also referred to as a response message corresponding to a specific random access preamble. In the MAC layer, RAR is a combination of all random access preamble response messages detected by a random access opportunity or multiple random access opportunities and the base station, and is grouped in the form of MAC data units.

S204. After receiving the message 2, the UE sends the message 3 in the corresponding time-frequency resource according to the configuration in the message 2.

S205, after receiving the message 3, the base station replies with a message 4 (Msg4) to the UE, indicating that the UE has successfully accessed the base station.

Wherein, the process from Msg1 to Msg4 is generally called a 4-step random access process. In addition, the random access preamble sent in Msg1 can also be applied to non-contention based random access and 2-step random access. It's just that the non-contention random access only includes Msg1 and Msg2. In addition, there is another 2-step random access, which consists of message A and message B. Among them, message A includes the transmission of the random access preamble and the first data information (for example, similar to message 1 and message 3 in 4-step random access), and message B includes contention resolution and uplink scheduling (for example, similar to message 4 Message 2 and message 4 in -step random access). Msg1, Msg3, Msg4 can be retransmitted after sending failure.

As shown in Figure 4, Figure 4 is a flow chart of downlink beam management based on CSI-RS, which mainly includes the following steps:

S401, when the UE accesses the base station, the detailed access process can refer to the steps shown in FIG. 2 .

S402, the UE reports the index of the SSB, so that the base station configures corresponding CSI-RS resources based on the SSB. It should be noted that the SSB index reported here may also be the SSB index determined by using the association relationship between the random access preamble and the SSB in S202, or reported in a similar manner to S202.

S403, the base station sends CSI-RS resource configuration through radio resource control (radio resource control, RRC).

S404, the base station sends the CSI-RS, and the UE performs measurement. For example, the base station can configure CSI-RS resources for repeated transmission, so that the UE can perform beam scanning so as to determine the optimal receiving beam for the UE. The base station may also configure the same reception information of the CSI-RS, and the base station uses different transmission beams to transmit the CSI-RS, so as to determine the optimal transmission beam of the base station.

S405, the base station performs related scheduling processing, such as uplink or downlink data transmission, based on the measurement information reported by the UE.

Wherein, the CSI-RS used for beam management in NR is a non-zero power (non-zero power, NZP) CSI-RS. The main configuration characteristics of the CSI-RS are shown in Table 1.

Table 1

First, the main parameters of CSI-RS resource configuration include: resource mapping configuration (resource mapping), PDSCH RE relative to NZP CSI-RS RE power offset (power control offset), NZP CSI-RS RE relative to SS RE Power offset (power control offset SS), scrambling code ID (scrambling ID), period and offset configuration (periodicity and offset) and QCL configuration.

Wherein, the resource mapping configuration mainly includes: time domain resource configuration, frequency domain resource configuration, code grouping configuration, density, frequency domain bandwidth and so on.

For example, as shown in Table 1, the resource parameter configuration is: Row1=[b ₃ ,...,b ₀ ]=[0010], k _i =f(i), it can be obtained: f(i)=[1], k ₀ =1. Port number is 1, so N=1; density ρ is 3; CDM-Type is No CDM, so L=1; s=0...L-1=0, j=0, and the sending port is specifically P=3000+ s+jL.

Table 2

Wherein, FIG. 5 is a schematic diagram of a resource mapping manner. Because ρ=3, the CSI-RS repeats every 1/3RB (4 REs), assuming that the base station configures Row1=[b ₃ ,...,b ₀ ]=[0010] through frequency domain allocation (frequency domain allocation) and The CDM-Type is No CDM, so the CSI-RS appears on the 1/5/9 RE.

Second, the key information of the sequence that generates the CSI-RS includes: the generator polynomial initialization parameter c _init of the sequence and the time slot number in the radio frame Number of OFDM symbols in a slot It is related to parameters such as OFDM symbol index l and scrambling index n _ID in the time slot. Wherein, the scrambling index is configured by upper layer parameters.

For the current protocol, in the random access process, the uplink and downlink receiving beams and transmitting beams are determined based on the SSB. However, the number of SSBs supported by the current protocol is relatively small, so a relatively wide beam is often used to achieve coverage of the entire cell, resulting in low gain. In addition, the beam alignment based on CSI-RS in the current protocol needs to be configured and implemented after random access, the configuration and implementation are complicated, the access delay of terminal equipment is high, and the communication performance is not high. In order to solve the above technical problems, the embodiments of the present application provide the following solutions.

As shown in FIG. 6 , FIG. 6 is a flowchart of a method for communicating a reference signal provided in an embodiment of the present application. The steps of the embodiment of the present application include at least:

S601. The base station determines the resource configuration of the channel state information reference signal CSI-RS according to the first message.

Wherein, the first message may include at least one of system information block No. 1 (system information block 1, SIB1), message 2, and message 4. The base station may indicate the control resource set of the PDCCH associated with the No. 1 system information block SIB1 and the search space associated with the SIB1 through the SSB. Then the UE receives the No. 1 system information block sent by the base station according to the control resource set and search space of the PDCCH. Wherein, message 2 may be a random access response, and message 4 may be an access success message.

Wherein, the CSI-RS may also be called a random access reference signal (random access-reference signal, RA-RS), an initial access and mobility reference signal (initial access and mobility-reference signal, IAM-RS), or beam adjustment Reference signal (beam refinement-reference signal, BR-RS), or cell searching reference signal (cell searching-reference signal, CS-RS), or handover reference signal (handover-reference signal, H-RS), or other names. CSI-RS refers to the reference signal used for beam alignment in the random access process, or a reference signal with a QCL relationship between some channel parameters and SSB in the random access process, the port number or spatial coefficient corresponding to the CSI-RS Not quite the same as SSB.

Wherein, the resource configuration of the CSI-RS includes at least one of the following: resource mapping parameters, sequence generation parameters, period and time slot position. Wherein, the resource mapping parameters of the CSI-RS include at least one of the following: number of ports, frequency domain density, starting position of frequency domain RBs, number of frequency domain RBs, frequency domain allocation, time domain start location and code division multiplexing type.

Optionally, the base station may, according to the physical downlink control channel (physical downlink control channel, PDCCH) associated with the first message, the physical downlink shared channel (physical downlink shared channel, PDSCH) associated with the first message, the first message A control resource set (control resource set, CORESET) of the PDCCH associated with the first message, a search space (common search space, CSS) of the PDCCH associated with the first message, and a physical cell identity (physical layer cell) associated with the first message identity), and an index of a synchronization signal block SSB associated with the first message, to determine the resource configuration of the CSI-RS. Specifically, the following options can be included:

In the first optional manner, when the resource mapping parameter is the number of ports corresponding to the CSI-RS, the base station, according to the maximum possible number of synchronization signal blocks SSB associated with the first message, the synchronization signal associated with the first message The time domain position of the block SSB, the number of SSBs associated with the first message, the carrier frequency range associated with the first message, the bandwidth of the search space of the PDCCH associated with the first message, the At least one of the PDCCH and the random access response RAR protocol data packet PDU carried by the PDSCH associated with the first message determines the number of ports corresponding to the CSI-RS.

For example, the base station may use the maximum possible number of SSBs associated with the first message and the bandwidth of the control resource set Determine the number of ports nrofPorts corresponding to the CSI-RS.

Among them, the maximum possible number of SSBs is related to the carrier frequency range. When the carrier frequency is in the first frequency range and the carrier frequency is less than f0, the maximum possible number of SSBs is four. When the carrier frequency is in the first frequency range and the carrier frequency is greater than f0, the maximum possible number of SSBs is 8. When the carrier frequency is in the second frequency range, the maximum possible number of SSBs is 64. Among them, f0 is 3GHz. For another example, when the maximum possible number of SSBs is 8, that is, the carrier frequency is in the first frequency range, the first frequency range may be less than 7.125 GHz. When the maximum possible number of SSBs is 64, that is, the carrier frequency is located in the second frequency range, the second frequency range may be greater than 7.125 GHz and less than 52.6 GHz.

When the maximum possible number of SSBs is 8 and the bandwidth of the PDCCH control resource set When it is 24, the number of ports corresponding to the CSI-RS is 4. When the maximum possible number of SSBs is 8, and When it is 48, the number of ports corresponding to the CSI-RS is 8. When the maximum possible number of SSBs is 8, and When the value is 96, the number of ports corresponding to the CSI-RS is 16.

When the maximum possible number of SSBs is 64, and When it is 24, the number of ports corresponding to the CSI-RS is 2. When the maximum possible number of SSBs is 64, and When it is 48, the number of ports corresponding to the CSI-RS is 4. When the maximum possible number of SSBs is 64, and When the value is 96, the number of ports corresponding to the CSI-RS is 8.

As another example, as shown in Table 2, the bandwidth of the control resource set of the PDCCH associated with SIB1 can be Determine the number of ports nrofPorts corresponding to the CSI-RS.

table 3

Among them, P1=4, P2=8, P3=12. Alternatively, P1=2, P2=4, P3=6.

It should be understood that this embodiment can be used in conjunction with other parameters. For example, the values of P1, P2, and P3 can be determined according to the carrier frequency or subcarrier spacing where the CSI-RS (or SIB1, SSB) is located, that is, different tables can be defined at different carrier frequencies or subcarrier spacing to determine the corresponding P1, The values of P2 and P3. For another example, P1, P2, The value of P3. For example, when the maximum possible number of SSBs is 8 and the number of transmitted SSBs is 4, the number of ports corresponding to the CSI-RS is 2. For example, when the maximum possible number of SSBs is 64 and the number of transmitted SSBs is 16, the number of ports corresponding to the CSI-RS is 4. For example, when the maximum possible number of SSBs is 64 and the number of transmitted SSBs is 30, the number of ports corresponding to the CSI-RS is 2. For example, when the maximum possible number of SSBs is 40 and the number of transmitted SSBs is 30, the number of ports corresponding to the CSI-RS is 2.

It should be noted that the above only uses 3 gears Taking CSI-RS nrofRBs as an example, there is no restriction on the number of gears.

For another example, the number of ports nrofPorts corresponding to the CSI-RS may be determined according to the PDCCH associated with the SIB1. Specifically, the port number nrofPorts corresponding to the CSI-RS is determined according to the CSI-RS port information (CSI-RS nrofPorts) field in the PDCCH associated with the SIB1.

In the second optional way, when the resource mapping parameter is the number of RBs in the frequency domain of the CSI-RS, the base station may associate the first message with the bandwidth of the PDCCH search space and the first message. At least one of the PDCCH and the PDSCH associated with the first message determines the number of frequency domain resource blocks RB of the CSI-RS.

For example, the number nrofRBs of the frequency domain RBs of the CSI-RS may be determined according to the CSI-RS frequency domain resource assignment (frequency domain resource assignment for CSI-RS) field in the PDCCH associated with the SIB1.

As another example, the number of frequency-domain RBs of the CSI-RS may be determined according to the bandwidth of the control resource set of the PDCCH associated with the SIB1. Wherein, the bandwidth of the PDCCH control resource set associated with SIB1 may be determined according to indication information of a master system information block (master information block, MIB). Specifically, the number of CSI-RS frequency domain resource RBs nrofRBs is equal to the bandwidth of the control resource set of the PDCCH associated with SIB1 Or, as shown in Table 4, Table 4 is the bandwidth of a control resource set of a group of PDCCHs The mapping relationship between nrofRBs and the number of RBs in the CSI-RS frequency domain. By looking up the table, according to the bandwidth of the control resource set of the PDCCH associated with SIB1 Obtain the number of RBs in the CSI-RS frequency domain nrofRBs.

Table 4

Specifically, it may be K1=24, K2=48, and K3=48.

It should be understood that this embodiment can be used in conjunction with other parameters. For example, the values of K1, K2, and K3 can be determined according to the carrier frequency or subcarrier spacing where the CSI-RS (or SIB1, SSB) is located, that is, the values of K1, K2, and K3 can be determined at different carrier frequencies or subcarrier intervals. The carrier spacing defines different tables to determine the corresponding values of K1, K2, and K3. Another example is to determine the values of K1, K2, and K3 according to the frequency band where the CSI-RS (or initial access) is located or the maximum number of SSBs supported by the BWP. It can also be further determined according to the actual sent SSB (or the number of sent SSBs). Corresponding values of K1, K2, K3. It should be noted that the above only uses 3 gears Or CSI-RS nrofRBs as an example, without any restriction on the number of gears.

As another example, the number nrofRBs of the frequency domain RBs of the CSI-RS may be determined according to the PDCCH associated with the SIB1 and/or the PDSCH associated with the SIB1.

Specifically, the number nrofRBs of CSI-RS frequency domain RBs is equal to the PDSCH bandwidth associated with SIB1, or the number nrofRBs of CSI-RS frequency domain RBs is determined according to the frequency domain resource assignment (frequency domain resource assignment) field in the PDCCH associated with SIB1. Or, determine the number nrofRBs of CSI-RS frequency domain RBs according to the CSI-RS frequency domain resource assignment (frequency domain resource assignment for CSI-RS) field in the PDCCH associated with SIB1.

Table 5 shows a mapping relationship between SIB1PDSCH bandwidth, frequency domain resource allocation in SIB1PDCCH, CSI-RS frequency domain resource allocation in SIB1PDCCH, and the number nrofRBs of CSI-RS frequency domain RBs. The CSI-RS frequency domain RB number nrofRBs can be determined according to at least one of SIB1PDSCH bandwidth, SIB1PDCCH frequency domain resource allocation, and SIB1PDCCH frequency domain resource CSI-RS frequency domain resources by looking up a table.

table 5

Specifically, R1=32, R2=68, K1=24, K2=48.

It should be understood that this embodiment can be used in conjunction with other parameters, such as determining the values of R1, R2, K1, and K2 according to the carrier frequency or subcarrier spacing where the CSI-RS (or SIB1, SSB) is located, that is, the values of R1, R2, K1, and K2 can be determined at different carrier frequencies Or the tables with different subcarrier spacing definitions determine the corresponding values of R1, R2, K1, and K2.

In a third optional manner, when the resource mapping parameter is the starting position of the frequency domain RB of the CSI-RS, the base station, according to the starting position of the PDCCH control resource set associated with the first message, the first At least one of the start position of the PDCCH associated with the message, the end position of the PDCCH associated with the first message, the start position of the PDSCH associated with the first message, and the end position of the PDSCH associated with the first message, Determine the starting position of the frequency domain RB of the CSI-RS.

For example, the starting position and/or ending RB of the frequency domain RB of the CSI-RS may be determined according to the starting position of the PDCCH control resource set associated with SIB1. Wherein, the starting position of the PDCCH control resource set associated with SIB1 is determined according to the offset (CORESET Offset) of the control resource set indicated by the MIB indication information and the frequency starting position of the SSB associated with SIB1. A location refers to an RB or a group of RBs. Specifically, the starting position startingRB of the CSI-RS frequency domain RB is equal to the starting position of the PDCCH CORESET associated with SIB1.

As another example, the starting RB and/or the ending RB of the CSI-RS frequency domain RB may be determined according to the starting or ending position of the PDCCH associated with the SIB1. Specifically, the base station can acquire the start position or end position of the PDCCH by sending the PDCCH associated with SIB1, and the UE can acquire the start position or end position of the PDCCH by receiving the PDCCH associated with SIB1. Wherein, the starting position startingRB of the CSI-RS frequency domain RB is equal to the starting position of the PDCCH associated with SIB1; or, the starting position startingRB of the CSI-RS frequency domain RB is equal to the ending position of the PDCCH associated with SIB1. Alternatively, the starting position startingRB of the RB in the frequency domain of the CSI-RS is equal to the center position within the PDCCH bandwidth associated with the SIB1.

As another example, the starting RB and/or the ending RB of the CSI-RS frequency domain RB may be determined according to the starting or ending position of the PSDCH associated with the SIB1. Specifically, the base station may acquire the start position or end position of the PSDCH by sending the PSDCH associated with SIB1, and the UE may acquire the start position or end position of the PSDCH by receiving the PSDCH associated with SIB1. Wherein, the starting position startingRB of the CSI-RS frequency domain RB is equal to the starting position of the PSDCH associated with SIB1; or, the starting position startingRB of the CSI-RS frequency domain RB is equal to the ending position of the PSDCH associated with SIB1. Alternatively, the starting position startingRB of the RB in the frequency domain of the CSI-RS is equal to the central position within the PSDCH bandwidth associated with the SIB1.

In a fourth optional manner, when the resource mapping parameter is CSI-RS frequency domain allocation, the base station uses at least one of the physical cell identifier associated with the first message and the SSB index associated with the first message , determining the frequency domain allocation of the CSI-RS. Wherein, the frequency domain allocation (frequency domain allocation) indicates the subcarrier position of the CSI-RS in the resource block RB.

For example, according to the physical layer cell identity (physical layer cell identity) Determine the frequency domain allocation of the CSI-RS. Specifically, the subcarrier position can be mod nrofPorts, where nrofPorts is the number of ports corresponding to the CSI-RS, and mod means modulo operation.

As another example, the frequency domain allocation of the CSI-RS may be determined according to the SSB index associated with the SIB1. Specifically, the subcarrier position of the CSI-RS in the resource block RB may be the SSB index mod nrofPorts, where nrofPorts is the number of ports corresponding to the CSI-RS. It should be noted that the index of the SSB may refer to the index of the SSB in the transmitted SSB, or the time index of the SSB, or the index of the SSB in half a system frame, or the index of the SSB in the maximum possible transmission index in the SSB.

In a fifth optional manner, when the resource mapping parameter is the time domain start position of the CSI-RS, the base station may determine the time domain start position of the CSI-RS according to the PDCCH associated with SIB1 and/or the PDSCH associated with SIB1 ( first OFDM symbol in time domain). Wherein, SIB1 and CSI-RS are sent in the same time slot.

For example, the time domain starting position of the CSI-RS is the last OFDM symbol of the PDSCH associated with SIB1. Alternatively, the time domain starting position of the CSI-RS is the kth OFDM symbol after the last OFDM symbol of the PDSCH associated with the SIB1. Wherein, any one of k=0,1. Alternatively, the time domain start position of the CSI-RS may be determined according to a time domain resource assignment (time domain resource assignment) field in the PDCCH associated with SIB1. Alternatively, the time domain starting position of the CSI-RS is determined according to the CSI-RS frequency domain resource assignment (time domain resource assignment for CSI-RS) field in the PDCCH associated with the SIB1. Alternatively, the time domain starting position of the CSI-RS is the OFDM symbol where the demodulation reference signal (de-modulation reference signal, DMRS) corresponding to the PDSCH associated with the SIB1 is located.

In a sixth optional manner, when the base station generates the CSI-RS sequence according to the sequence generation parameters, the base station generates the CSI-RS sequence according to the index of the SSB associated with the first message, the physical cell identity associated with the first message, the The index of the time slot of the control resource set of the associated PDCCH, the index of the time slot of the PDCCH associated with the first message, the index of the time slot of the PDSCH associated with the first message, the PDCCH control associated with the first message The index of the start or end OFDM symbol of the resource set, the index of the time slot where the CSI-RS is located, the index of the start or end OFDM symbol of the PDCCH associated with the first message, the index of the first At least one of the index of the start or end OFDM symbol of the PDSCH associated with a message, the index of the OFDM symbol where the CSI-RS is located, and the number of ports corresponding to the CSI-RS, determine the sequence of the CSI-RS .

For example, the pseudo-random sequence generator corresponding to CSI-RS is initialized

Among them, n _ID is the index or physical cell identity of the SSB associated with SIB1 is the number of OFDM symbols in a slot, It is one of the following parameters: the index of the slot of the PDCCH control resource set associated with SIB1, the index of the slot of PDCCH associated with SIB1, the index of the slot of PDSCH associated with SIB1, and the index of the slot where the CSI-RS is located. l is one of the following parameters: the index of the start or end OFDM symbol of the PDCCH control resource set associated with SIB1, the index of the start or end OFDM symbol of the PDCCH associated with SIB1, the start or end OFDM symbol of the PDSCH associated with SIB1 The index of the CSI-RS and the index of the OFDM symbol where the CSI-RS is located.

Another example: the pseudo-random sequence generator corresponding to CSI-RS should be initialized as:

in, is the number of OFDM symbols in a slot (for example, ), is the index of the time slot where the CSI-RS is located, k _SSB is the index of the SSB associated with SIB1, is a physical cell identifier; K is a non-negative integer, indicating the number of candidate SSBs, for example, K can take a value of 4, 8, 16, 64, or 128; or K can take a value of 10 or 20.

Further, the base station may, according to the random access-radio network temporary identifier (random access-radio network temporary identifier, RA-RNTI) associated with the first message, the index of the time slot of the random access opportunity associated with the first message , the frequency index of the random access opportunity associated with the first message, the index of the carrier where the random access opportunity associated with the first message is located, and the partial bandwidth BWP where the random access opportunity associated with the first message is located At least one of the index of the index and the index of the starting OFDM symbol of the random access opportunity associated with the first message, to determine the sequence of the CSI-RS.

For example, the pseudo-random sequence generator corresponding to CSI-RS should be initialized as:

in, is the number of OFDM symbols in a slot, It is one of the following parameters: the index of the time slot of the PDCCH control resource set associated with message 2, the index of the time slot of PDCCH associated with message 2, the index of the time slot of PDSCH associated with message 2, the index of the time slot where the CSI-RS is located index. l is one of the following parameters: the index of the start or end OFDM symbol of the PDCCH control resource set associated with message 2, the index of the start or end OFDM symbol of the PDCCH associated with message 2, the start or end of the PDSCH associated with message 2 The index of the end OFDM symbol and the index of the OFDM symbol where the CSI-RS is located. RA-RNTI is a random access radio network temporary identifier.

Further, the base station may determine the sequence of the CSI-RS according to a temporary cell-radio network temporary identifier (temporary cell-radio network temporary identifier, TC-RNTI) associated with the first message.

Another example: the pseudo-random sequence generator corresponding to CSI-RS should be initialized as:

in, is the number of OFDM symbols in a slot, It is one of the following parameters: the index of the time slot of the PDCCH control resource set associated with message 4, the index of the time slot of PDCCH associated with message 4, the index of the time slot of PDSCH associated with message 4, the index of the time slot where the CSI-RS is located index. l is one of the following parameters: the index of the start or end OFDM symbol of the PDCCH control resource set associated with message 4, the index of the start or end OFDM symbol of the PDCCH associated with message 4, the start or end of the PDSCH associated with message 4 The index of the end OFDM symbol and the index of the OFDM symbol where the CSI-RS is located. TC-RNTI is a temporary radio network temporary identifier.

In a seventh optional manner, the time period for sending the CSI-RS is related to the time period of the SSB or SIB1. For example, the time period P1 of CSI-RS transmission and the period P2 of SSB satisfy: P1=N×P2, where P2 is 5ms, 10ms, 20ms, 40ms, 80ms, 160ms, 320ms or 640ms and so on. N is an integer, N=1, 2, 4, 8 or 16 and so on. For another example, the time period P1 of CSI-RS transmission and the period P3 of SIB1 satisfy: P1=M×P3, where M is an integer, M=1, 2, 4, 8 or 16, etc., and P3 is 20ms, 40ms, 80ms, 160ms, 320ms or 640ms and so on. Optionally, M or N may be determined according to the first message, or may be predefined.

In addition to the above several optional ways to determine the CSI-RS resource configuration, the above two or more ways may also be combined to determine the CSI-RS resource configuration. The above only lists several parameters in the resource configuration of the CSI-RS, and the present application can also use the same method to determine other parameters in the resource configuration of the CSI-RS, which will not be repeated here. Methods similar to this for determining the resource configuration of the CSI-RS are within the protection scope of the present application.

It should be noted that "association" can also be understood as "correspondence". For example, the PDCCH associated with the first message, the PDSCH associated with the first message, the control resource set of the PDCCH associated with the first message, the search space of the PDCCH associated with the first message, the physical cell identity associated with the first message, and the PDCCH associated with the first message The index of the associated SSB can also be understood as: the PDCCH corresponding to the first message, the PDSCH corresponding to the first message, the control resource set of the PDCCH corresponding to the first message, the search space of the PDCCH corresponding to the first message, the PDCCH corresponding to the first message The physical cell identifier and the index of the SSB corresponding to the first message.

The SSB associated with the first message may refer to the SSB that is quasi-co-located with the first message (eg, SIB1, Message 2, or Message 4). Alternatively, the SSB associated with the first message refers to the SSB associated with message 1 in the random access process, where the first message is message 2 or message 4 corresponding to message 1 .

Optionally, the UE may send a second message to the base station, where the second message includes at least one of an index of a synchronization signal block SSB and CSI-RS request information, and the base station transmits a second message according to the index of the SSB and the CSI-RS request information At least one of them, send the first message and the CSI-RS at the same time, or send the first message first and then send the CSI-RS, or send the first message and the CSI-RS in the same time slot, for example, in the first message The CSI-RS is sent in a sending slot. Wherein, the second message may be Msg3.

S602. The base station sends the first message and the CSI-RS to the UE.

Optionally, the base station sends the first message and the CSI-RS together to the UE.

The base station sending the first message and the CSI-RS together to the UE may be understood as: the base station first sends the first message, and then sends the CSI-RS. Or, the base station sends the first message and the CSI-RS at the same time, for example, the time domain of the first message and the CSI-RS are the same, and the frequency domain is orthogonal. Alternatively, the time (slot and/or OFDM symbol) at which the base station sends the first message is associated with the time (slot and/or OFDM symbol) at which the CSI-RS is sent, for example, the initial OFDM symbol for sending the CSI-RS is X OFDM symbols after the last OFDM symbol of the first message is sent, where X is an integer. Alternatively, transmit at the same time (time slot and/or OFDM symbol) and frequency (resource block or part of bandwidth).

S603, the UE determines resource configuration of the CSI-RS according to the first message.

The method for the UE to determine the resource configuration of the CSI-RS according to the first message is the same as the method for the base station to determine the resource configuration of the CSI-RS according to the first message. The specific implementation method can refer to the method for the base station to determine the resource configuration of the CSI-RS. I won't repeat them here.

S604, the UE may receive the CSI-RS sent by the base station according to the resource configuration of the CSI-RS.

For example, the UE can obtain channel information according to the CSI-RS, implement beam alignment, and so on.

It should be noted that the UE and the base station can complete the above steps during the wireless access process. Wherein, the radio access procedure may include cell search, downlink synchronization, random access, handover, and the like.

In the embodiment of the present application, by sending the CSI-RS and the first message to the UE, the resource configuration of the CSI-RS is determined through the first message, reducing the resource configuration overhead of the CSI-RS, and achieving more accurate beam alignment. In addition, it can improve the transmission and reception performance of the beam during the wireless access process, reduce the delay of random access and subsequent data transmission, and improve the communication performance.

As shown in FIG. 7 , FIG. 7 is a flowchart of a method for communicating a reference signal provided in an embodiment of the present application. The embodiment of the present application includes at least the following steps:

S701, the base station sends the SSB to the UE.

Optionally, the base station may send the SSB to the UE according to a preset period.

Optionally, the base station may indicate the control resource set of the PDCCH associated with the No. 1 system information block SIB1 and the search space associated with the SIB1 through the SSB. The UE can receive the No. 1 system information block sent by the base station according to the control resource set and search space of the PDCCH. Wherein, the parameter information of the control resource set of the PDCCH includes: the bandwidth of the control resource set Number of OFDM symbols The offset value relative to the starting position of the SSB. Wherein, the unit is a resource block (resource block, RB).

Wherein, the slot position of the search space of the PDCCH associated with SIB1 is related to the SSB index. For example, the slot position of the PDCCH associated with SIB1 corresponding to SSB i is M and O can be determined through MIB indication information and table 6 lookup. The last column in Table 6 is the position of the initial OFDM symbol of the control resource set in the slot. The system frame number SFN _C where the search space is located satisfies: if SFN _C mod 2 = 0. or, if Then SFN _C mod 2=1.

Table 6

S702, the base station sends the PDCCH associated with the SIB1, the PDSCH associated with the SIB1, and the CSI-RS associated with the SIB1 to the UE together.

Wherein, sending the PDCCH associated with SIB1, the PDSCH associated with SIB1, and the CSI-RS associated with SIB1 can be understood as: the CSI-RS and the PDCCH associated with SIB1 and/or the PDSCH associated with SIB1 are at the same time (slot and/or OFDM symbols) and frequency (resource block or part of bandwidth) transmission. Alternatively, the base station first sends the SIB1, and then sends the CSI-RS. Alternatively, the time (slot and/or OFDM symbol) at which the base station sends SIB1 is associated with the time (slot and/or OFDM symbol) at which CSI-RS is sent, for example, the initial OFDM symbol for sending CSI-RS is when sending SIB1 X OFDM symbols after the last OFDM symbol of , where X is an integer. Alternatively, the base station transmits the SIB1 and the CSI-RS at the same time, for example, the time domains of the SIB1 and the CSI-RS are the same, and the frequency domains are orthogonal.

Optionally, after receiving the PDCCH associated with SIB1 and the PDSCH associated with SIB1, the UE may, according to the PDCCH associated with SIB1, the PDSCH associated with SIB1, the control resource set of PDCCH associated with SIB1, the search space of PDCCH associated with SIB1, and the PDCCH associated with SIB1 At least one of the physical cell identifier and the index of the synchronization signal block SSB associated with the SIB1 determines the resource configuration of the CSI-RS.

Wherein, the resource configuration of the CSI-RS includes at least one of the following: resource mapping parameters, sequence generation parameters, period and time slot position. Wherein, the resource mapping parameters of the CSI-RS include at least one of the following: number of ports, frequency domain density, starting position of frequency domain RBs, number of frequency domain RBs, frequency domain allocation, time domain start location and code division multiplexing type.

The method for the UE to determine the resource configuration of the CSI-RS is the same as the method for the base station to determine the resource configuration of the CSI-RS in the embodiment shown in FIG.

Optionally, the UE receives the CSI-RS sent by the base station according to the resource configuration of the CSI-RS.

S703, the UE sends message 1 to the base station.

Wherein, message 1 may include one or more random access preambles associated with SSB or CSI-RS.

Optionally, before the UE sends the message 1 to the base station, the UE may measure the signal between the base station and the UE according to the SSB or CSI-RS to determine the measurement information of the SSB or CSI-RS. And determine one or more random access preambles associated with the SSB or the CSI-RS according to the measurement information of the SSB and the CSI-RS.

Optionally, the UE may use multiple antenna ports to send a random access preamble, where the precoding manner for sending the random access preamble is determined according to CSI-RS or SSB measurement information.

Optionally, the UE may use multiple antenna ports to send multiple random access preambles, where the precoding manners adopted by each random access preamble are different.

S704, the base station sends message 2 to the UE.

Wherein, message 2 is a random access response. The message 2 includes an uplink scheduling grant.

S705, the UE sends message 3 to the base station according to the uplink scheduling grant.

Wherein, message 3 may be an uplink transmission scheduled by a random access response.

Optionally, the UE may report CSI-RS or SSB measurement information to the base station, where the measurement information includes at least one of the following: CSI-RS resource index (CSI-RS resource index, CRI), channel quality indication (channel quality indicator, CQI), precoding matrix index (precoding matrix indicator, PMI), rank index (rank index, RI).

S706, the base station sends message 4 or indication information to the UE, where the indication information is used to instruct retransmission of message 3. Continue to establish the RRC connection or data communication process subsequently.

In the embodiment of this application, during the wireless connection process, by sending the CSI-RS and SIB1 together to the UE, the resource configuration of the CSI-RS is completed during the wireless access process or before establishing an RRC connection with the base station, reducing the CSI-RS The resource configuration overhead of the RS is used to achieve more accurate beam alignment. In addition, the performance of beam transmission and reception in the wireless access process is improved, the time delay of random access and subsequent data transmission is reduced, and the communication performance is improved.

As shown in FIG. 8 , FIG. 8 is a flowchart of a method for communicating a reference signal provided in an embodiment of the present application. The embodiment of the present application includes at least the following steps:

S801, the base station sends the SSB to the UE.

This step is the same as S701 in the embodiment shown in FIG. 7 , and the specific implementation method can refer to S701 , and this step will not be described again.

S802, the base station sends the PDCCH associated with the SIB1 and the PDSCH associated with the SIB1 to the UE.

S803, the UE sends message 1 to the base station.

Wherein, message 1 may include one or more random access preambles associated with the SSB.

Optionally, before the UE sends the message 1 to the base station, the UE may measure the signal between the base station and the UE according to the SSB to determine the measurement information of the SSB. And according to the measurement information of the SSB, one or more random access preambles associated with the SSB are determined.

Optionally, the UE may use multiple antenna ports to send a random access preamble, where the precoding manner for sending the random access preamble is determined according to SSB measurement information.

Optionally, the UE may use multiple antenna ports to send multiple random access preambles, where the precoding manners adopted by each random access preamble are different.

S804, the base station sends the message 2 (Msg2) and the CSI-RS together to the UE.

Wherein, message 2 may be a random access response. The message 2 may include an uplink scheduling grant.

Among them, sending message 2 and CSI-RS together can be understood as: CSI-RS and PDCCH associated with message 2 and/or PDSCH associated with message 2 at the same time (time slot and/or OFDM symbol) and frequency (resource block or part of the bandwidth) to send. Alternatively, the base station first sends message 2, and then sends the CSI-RS. Alternatively, the time (slot and/or OFDM symbol) at which the base station sends message 2 is associated with the time (slot and/or OFDM symbol) at which the CSI-RS is sent, for example, the initial OFDM symbol for sending the CSI-RS is in the Y OFDM symbols after the last OFDM symbol of message 2, where Y is an integer. Alternatively, the base station sends the message 2 and the CSI-RS at the same time, for example, the time domain of the message 2 and the CSI-RS are the same, and the frequency domain is orthogonal.

Optionally, after receiving the message 2, the UE may, according to the PDCCH associated with the message 2, the PDSCH associated with the message 2, and the random access response protocol data packet (random access response protocol data unit, RAR PDU) in the PDSCH associated with the message 2 At least one of the uplink scheduling grant in ), the PDCCH control resource set associated with message 2, the search space of PDCCH associated with message 2, the physical cell identity associated with message 2, and the index of the synchronization signal block SSB associated with message 2 , determining the resource configuration of the CSI-RS.

Wherein, the search space and control resource set of the PDCCH associated with message 2 may be the same as the search space and control resource set of the PDCCH associated with SIB1. For example, the MIB in the SSB can indicate the parameter information of the PDCCH control resource set and search space corresponding to SIB1, that is, the PDCCH search space and control resource set associated with message 2 can be obtained.

Wherein, the search space and control resource set of the PDCCH associated with message 2 may also be configured through SIB1 or other RRC messages.

Optionally, the base station can configure the value or value range of some parameters in the CSI-RS resource configuration through SIB1, and use at least one of the PDCCH associated with message 2, the PDSCH associated with message 2, and the RAR PDU associated with message 2. Values or value ranges of another part of parameters in the resource configuration indicating the CSI-RS.

Wherein, the resource configuration of the CSI-RS includes at least one of the following: resource mapping parameters, sequence generation parameters, period and time slot position. Wherein, the resource mapping parameters of the CSI-RS include at least one of the following: number of ports, frequency domain density, starting position of frequency domain RBs, number of frequency domain RBs, frequency domain allocation, time domain start location and code division multiplexing type.

It should be noted that the method for the UE to determine the resource configuration of the CSI-RS is the same as the method for the base station to determine the resource configuration of the CSI-RS in the embodiment shown in FIG.

Optionally, the UE receives the CSI-RS sent by the base station according to the resource configuration of the CSI-RS. Then, according to the CSI-RS, the signal between the base station and the UE is measured to determine the measurement information of the CSI-RS.

S805, the UE sends message 3 to the base station according to the uplink scheduling grant.

Wherein, message 3 may also be an uplink transmission scheduled by the random access response.

S806, the base station sends message 4 or indication information to the UE, where the indication information is used to instruct retransmission of message 3. Continue to establish the RRC connection or data communication process subsequently.

In the embodiment of this application, during the wireless connection process, by sending the CSI-RS and message 2 together to the UE, the resource configuration of the CSI-RS is completed during the wireless access process or before establishing an RRC connection with the base station, reducing the CSI -Resource configuration overhead of the RS to achieve more accurate beam alignment. In addition, the performance of beam transmission and reception in the wireless access process is improved, the time delay of random access and subsequent data transmission is reduced, and the communication performance is improved.

As shown in FIG. 9 , FIG. 9 is a flowchart of a method for communicating a reference signal provided in an embodiment of the present application. The embodiment of the present application includes at least the following steps:

S901, the base station sends the SSB to the UE.

This step is the same as S701 in the embodiment shown in FIG. 7 , and reference may be made to S701 for a specific implementation manner, and details will not be repeated for this step.

S902, the base station sends the PDCCH associated with the SIB1 and the PDSCH associated with the SIB1 to the UE.

S903, the UE sends message 1 to the base station.

Wherein, message 1 may include one or more random access preambles associated with the SSB.

Optionally, before the UE sends the message 1 to the base station, the UE may measure the signal between the base station and the UE according to the SSB to determine the measurement information of the SSB. And according to the measurement information of the SSB, one or more random access preambles associated with the SSB are determined.

Optionally, the UE may use multiple antenna ports to send a random access preamble, where the precoding manner for sending the random access preamble is determined according to SSB measurement information.

Optionally, the UE may use multiple antenna ports to send multiple random access preambles, where the precoding manners adopted by each random access preamble are different.

S904, the base station sends message 2 to the UE.

Wherein, message 2 may be a random access response. The message 2 includes an uplink scheduling grant.

S905, the UE sends message 3 to the base station according to the uplink scheduling grant.

Wherein, message 3 may also be an uplink transmission scheduled by the random access response.

Optionally, the message 3 may include CSI-RS request information, and after receiving the message 3, the base station may determine to send the CSI-RS in the sending time slot of the message 4 according to the CSI-RS request information.

Wherein, the CSI-RS request information may include the resource configuration of the CSI-RS that the UE expects to receive, for example, the resource configuration that the UE expects to receive the CSI-RS includes at least one of the following: port number, frequency domain density, frequency domain RB start Location frequency domain resource RB quantity, frequency domain allocation, time domain start position 1, code division multiplexing type.

Optionally, message 3 may include index or indication information of the synchronization signal block SSB. After receiving message 3, the base station may determine to send the CSI-RS in the sending time slot of message 4 according to the SSB index or indication information.

Optionally, message 3 may include the index of the synchronization signal block SSB and CSI-RS request information. After receiving the message 3, the base station can determine to send the CSI-RS in the sending time slot of the message 4 according to the index of the synchronization signal block SSB and the CSI-RS request information, wherein the CSI-RS and the SSB are quasi co-located.

S906, the base station sends the message 4 together with the CSI-RS to the UE.

Among them, sending message 4 and CSI-RS together can be understood as: CSI-RS and PDCCH associated with message 4 and/or PDSCH associated with message 2 at the same time (time slot and/or OFDM symbol) and frequency (resource block or part of the bandwidth) to send. Alternatively, the base station first sends message 4, and then sends the CSI-RS. Alternatively, the time (slot and/or OFDM symbol) at which the base station sends message 4 is associated with the time (slot and/or OFDM symbol) at which CSI-RS is sent, for example, the initial OFDM symbol for sending CSI-RS is at Z OFDM symbols after the last OFDM symbol of message 4, where Z is an integer. Alternatively, the base station transmits the message 4 and the CSI-RS at the same time, for example, the time domain of the message 4 and the CSI-RS are the same, and the frequency domain is orthogonal.

Optionally, the UE may associate the PDCCH associated with message 4, the PDSCH associated with message 4, the control resource set of PDCCH associated with message 4, the search space of PDCCH associated with message 4, the physical cell identity associated with message 4, and the PDCCH associated with message 4. At least one item of the index of the synchronization signal block SSB determines the resource configuration of the CSI-RS.

Wherein, the search space and control resource set of the PDCCH associated with message 4 may be the same as the search space and control resource set of the PDCCH associated with SIB1. For example, the MIB in the SSB can indicate the parameter information of the PDCCH control resource set and search space corresponding to SIB1, that is, the PDCCH search space and control resource set associated with message 4 can be obtained.

Wherein, the search space and control resource set of the PDCCH associated with message 4 may also be configured through SIB1 or other RRC messages.

Optionally, the base station can configure the value or value range of some parameters in the CSI-RS resource configuration through SIB1, and use at least one of the PDCCH associated with message 2, the PDSCH associated with message 2, and the RAR PDU associated with message 2. Values or value ranges of another part of parameters in the resource configuration indicating the CSI-RS.

Wherein, the resource configuration of the CSI-RS includes at least one of the following: resource mapping parameters, sequence generation parameters, period and time slot position. Wherein, the resource mapping parameters of the CSI-RS include at least one of the following: number of ports, frequency domain density, starting position of frequency domain RBs, number of frequency domain RBs, frequency domain allocation, time domain start location and code division multiplexing type.

It should be noted that the method for the UE to determine the resource configuration of the CSI-RS is the same as the method for the base station to determine the resource configuration of the CSI-RS in the embodiment shown in FIG.

Optionally, the UE receives the CSI-RS sent by the base station according to the resource configuration of the CSI-RS. Then, according to the CSI-RS, the signal between the base station and the UE is measured to determine the measurement information of the CSI-RS.

In the embodiment of this application, during the wireless connection process, by sending the CSI-RS and message 4 together to the UE, the resource configuration of the CSI-RS is completed during the wireless access process or before establishing an RRC connection with the base station, reducing the CSI -Resource configuration overhead of the RS to achieve more accurate beam alignment. In addition, the performance of beam transmission and reception in the wireless access process is improved, the time delay of random access and subsequent data transmission is reduced, and the communication performance is improved.

The various embodiments described herein may be independent solutions, or may be combined according to internal logic, and these solutions all fall within the protection scope of the present application.

It can be understood that, in the above method embodiments, the methods and operations implemented by the terminal equipment can also be implemented by components (such as chips or circuits) that can be used in the terminal equipment, and the methods and operations implemented by the network equipment can also be implemented by A component (such as a chip or a circuit) implementation that can be used in a network device.

The foregoing mainly introduces the solutions provided by the embodiments of the present application from the perspectives of various interactions. It can be understood that each network element, such as a transmitting end device or a receiving end device, includes a corresponding hardware structure and/or software module for performing each function in order to realize the above functions. Those skilled in the art should be aware that, in combination with the units and algorithm steps of the examples described in the embodiments disclosed herein, the present application can be implemented in the form of hardware or a combination of hardware and computer software. Whether a certain function is executed by hardware or computer software drives hardware depends on the specific application and design constraints of the technical solution. Skilled artisans may use different methods to implement the described functions for each specific application, but such implementation should not be regarded as exceeding the scope of the present application.

The embodiment of the present application can divide the functional modules of the transmitting end device or the receiving end device according to the above method example, for example, each functional module can be divided corresponding to each function, or two or more functions can be integrated into one processing module middle. The above-mentioned integrated modules can be implemented in the form of hardware or in the form of software function modules. It should be noted that the division of modules in the embodiment of the present application is schematic, and is only a logical function division, and there may be other division methods in actual implementation. In the following, the description will be made by taking the division of each functional module corresponding to each function as an example.

The method provided by the embodiment of the present application has been described in detail above with reference to FIG. 6 to FIG. 9 . Hereinafter, the communication device provided by the embodiment of the present application will be described in detail with reference to FIG. 10 to FIG. 13 . It should be understood that the descriptions of the device embodiments correspond to the descriptions of the method embodiments. Therefore, for details that are not described in detail, reference may be made to the method embodiments above. For brevity, details are not repeated here.

Please refer to FIG. 10 . FIG. 10 is a schematic structural diagram of a communication device provided by an embodiment of the present application. The communication device 10 may include a receiving module 1001 and a sending module 1003 , and optionally, may also include a processing module 1002 . The receiving module 1001 and the sending module 1003 can communicate with the outside, and the processing module 1002 is used for processing, such as determining the resource configuration of the CSI-RS. The receiving module 1001 and the sending module 1003 may also be referred to as a communication interface, a transceiver unit or a transceiver module. The receiving module 1001 and the sending module 1003 may be used to perform the actions performed by the terminal device in the above method embodiments.

For example: the receiving module 1001 and the sending module 1003 may also be referred to as a transceiver module or a transceiver unit (including a receiving unit and/or a sending unit), which are respectively used to perform the steps of sending and receiving by the terminal device in the above method embodiments.

In a possible design, the communication device 10 may implement the steps or processes corresponding to the execution of the terminal device in the above method embodiments, for example, it may be the terminal device, or a chip or circuit configured in the terminal device. The receiving module 1001 and the sending module 1003 are used to perform transceiving-related operations on the terminal device side in the above method embodiments, and the processing module 1002 is used to perform processing-related operations on the terminal device in the above method embodiments.

A receiving module 1001, configured to receive a first message sent by a network device, where the first message includes at least one of system information block No. 1, message 2, and message 4; a processing module 1002, configured to, according to the first message, Determine the resource configuration of channel state information reference signal CSI-RS; the receiving module 1001 is further configured to receive the CSI-RS sent by the network device according to the resource configuration.

Optionally, the first message is sent together with the CSI-RS.

Optionally, the processing module 1002 is further configured to, according to the physical downlink control channel PDCCH associated with the first message, the physical downlink shared channel PDSCH associated with the first message, and the control resource set of the PDCCH associated with the first message , at least one of the search space of the PDCCH associated with the first message, the physical cell identity associated with the first message, and the index of the synchronization signal block SSB associated with the first message, and determine the CSI-RS resource allocation.

Optionally, the processing module 1002 is further configured to, according to the maximum possible number of synchronization signal blocks SSBs associated with the first message, the time domain position of the synchronization signal blocks SSBs associated with the first message, and the SSBs associated with the first message The number of the carrier frequency range associated with the first message, the bandwidth of the search space of the PDCCH associated with the first message, the random access carried by the PDCCH associated with the first message and the PDSCH associated with the first message Responding to at least one item in the RAR protocol data packet PDU, determine the number of ports corresponding to the CSI-RS.

Optionally, the processing module 1002 is further configured to determine according to at least one of the search space bandwidth of the PDCCH associated with the first message, the PDCCH associated with the first message, and the PDSCH associated with the first message The number of RBs in the frequency domain of the CSI-RS.

Optionally, the processing module 1002 is further configured to, according to the start position of the control resource set of the PDCCH associated with the first message, the start position of the PDCCH associated with the first message, the PDCCH associated with the first message At least one of the end position, the start position of the PDSCH associated with the first message, and the end position of the PDSCH associated with the first message determines the start position of the frequency-domain RB of the CSI-RS.

Optionally, the processing module 1002 is further configured to determine the frequency domain allocation of the CSI-RS according to at least one of the physical cell identity associated with the first message and the SSB index associated with the first message.

Optionally, the processing module 1002 is further configured to: according to the SSB index associated with the first message, the physical cell identifier associated with the first message, and the time slot of the PDCCH control resource set associated with the first message Index, the index of the PDCCH time slot associated with the first message, the index of the PDSCH time slot associated with the first message, the starting or ending orthogonal frequency division of the PDCCH control resource set associated with the first message The index of the multiplexing OFDM symbol, the index of the time slot where the CSI-RS is located, the index of the start or end OFDM symbol of the PDCCH associated with the first message, the start or end OFDM symbol of the PDSCH associated with the first message At least one of the index of the symbol, the index of the OFDM symbol where the CSI-RS is located, and the number of ports corresponding to the CSI-RS determines the sequence corresponding to the CSI-RS.

Optionally, the processing module 1002 is further configured to: according to the random access radio network temporary identifier RA-RNTI associated with the first message, the index of the time slot of the random access opportunity associated with the first message, the second An index of the frequency of the random access opportunity associated with the first message, an index of the carrier where the random access opportunity associated with the first message is located, an index of the partial bandwidth BWP where the random access opportunity associated with the first message is located, and the at least one item of the index of the starting OFDM symbol of the random access opportunity associated with the first message, and determine the sequence corresponding to the CSI-RS.

Optionally, the sending module 1003 is configured to send a second message to the network device, where the second message includes at least one of an index of a synchronization signal block SSB and CSI-RS request information, and the index of the SSB and At least one item of CSI-RS request information is used to instruct the network device to send the CSI-RS in the sending time slot of the first message.

Optionally, the resource configuration of the CSI-RS includes at least one of the following: resource mapping parameters, sequence generation parameters, period and slot position.

Optionally, the resource mapping parameters of the CSI-RS include at least one of the following: number of ports, frequency domain density, starting position of frequency domain RBs, number of frequency domain RBs, frequency domain allocation, time domain Start position and code division multiplexing type.

It should be noted that the implementation of each module may also refer to corresponding descriptions of the method embodiments shown in FIGS. 6-9 to execute the methods and functions performed by the terminal device in the foregoing embodiments.

Please refer to FIG. 11 . FIG. 11 is a schematic structural diagram of a communication device provided by an embodiment of the present application. The communication device 11 may include a sending module 1101 and a receiving module 1103 , and optionally, may also include a processing module 1102 . The receiving module 1101 and the sending module 1103 can communicate with the outside, and the processing module 1102 is used for processing, such as determining the resource configuration of the CSI-RS. The sending module 1101 and the receiving module 1103 may also be referred to as a communication interface, a transceiver module or a transceiver unit. The sending module 1101 and the receiving module 1103 may be used to perform the actions performed by the network device in the above method embodiments.

For example: the sending module 1101 and the receiving module 1103 may also be called a transceiver module or a transceiver unit (including a sending unit and/or a receiving unit), and are respectively used to perform the steps of sending and receiving by the network device in the above method embodiments.

In a possible design, the communication device 11 can implement the steps or processes corresponding to the execution of the network equipment in the above method embodiments, for example, it can be a network equipment, or a chip or a circuit configured in the network equipment. The sending module 1101 and the receiving module 1103 are used to perform the sending and receiving related operations of the network device side in the above method embodiments, and the processing module 1102 is used to perform the processing related operations of the network device in the above method embodiments.

The processing module 1102 is configured to determine the resource configuration of the channel state information reference signal CSI-RS according to the first message, the first message including at least one of the system information block No. 1, message 2 and message 4; the sending module 1101, It is used to send the first message and the CSI-RS to the terminal device.

Optionally, the first message is sent together with the CSI-RS.

Optionally, the processing module 1102 is further configured for the network device to associate the physical downlink control channel PDCCH associated with the first message, the physical downlink shared channel PDSCH associated with the first message, and the PDCCH associated with the first message At least one of the control resource set of the first message, the search space of the PDCCH associated with the first message, the physical cell identity associated with the first message, and the index of the synchronization signal block SSB associated with the first message, determine the The resource configuration of the CSI-RS is described.

Optionally, the processing module 1102 is further configured to, according to the maximum possible number of synchronization signal blocks SSBs associated with the first message, the time domain position of the synchronization signal blocks SSBs associated with the first message, and the SSBs associated with the first message The number of the carrier frequency range associated with the first message, the bandwidth of the search space of the PDCCH associated with the first message, the random access carried by the PDCCH associated with the first message and the PDSCH associated with the first message Responding to at least one item in the RAR protocol data packet PDU, determine the number of ports corresponding to the CSI-RS.

Optionally, the processing module 1102 is further configured to determine according to at least one of the search space bandwidth of the PDCCH associated with the first message, the PDCCH associated with the first message, and the PDSCH associated with the first message The number of RBs in the frequency domain of the CSI-RS.

Optionally, the processing module 1102 is further configured to, according to the start position of the control resource set of the PDCCH associated with the first message, the start position of the PDCCH associated with the first message, the PDCCH associated with the first message At least one of the end position, the start position of the PDSCH associated with the first message, and the end position of the PDSCH associated with the first message determines the start position of the frequency-domain RB of the CSI-RS.

Optionally, the processing module 1102 is further configured to determine the frequency domain allocation of the CSI-RS according to at least one of the physical cell identity associated with the first message and the SSB index associated with the first message.

Optionally, the processing module 1102 is further configured to, according to the SSB index associated with the first message, the physical cell identifier associated with the first message, and the time slot of the PDCCH control resource set associated with the first message Index, the index of the PDCCH time slot associated with the first message, the index of the PDSCH time slot associated with the first message, the starting or ending orthogonal frequency division of the PDCCH control resource set associated with the first message The index of the multiplexing OFDM symbol, the index of the time slot where the CSI-RS is located, the index of the start or end OFDM symbol of the PDCCH associated with the first message, the start or end OFDM symbol of the PDSCH associated with the first message At least one of the index of the symbol, the index of the OFDM symbol where the CSI-RS is located, and the number of ports corresponding to the CSI-RS determines the sequence of the CSI-RS.

Optionally, the processing module 1102 is further configured to: according to the random access radio network temporary identifier RA-RNTI associated with the first message, the index of the time slot of the random access opportunity associated with the first message, the second An index of the frequency of the random access opportunity associated with the first message, an index of the carrier where the random access opportunity associated with the first message is located, an index of the partial bandwidth BWP where the random access opportunity associated with the first message is located, and the at least one item of the index of the starting OFDM symbol of the random access opportunity associated with the first message, and determine the sequence of the CSI-RS.

Optionally, the receiving module 1103 is configured to receive a second message sent by the terminal device, where the second message includes at least one of an index of a synchronization signal block SSB and CSI-RS request information;

The processing module 1102 is further configured to determine to send the CSI-RS in the sending time slot of the first message according to at least one of the SSB index and the CSI-RS request information.

Optionally, the resource configuration of the CSI-RS includes at least one of the following: resource mapping parameters, sequence generation parameters, period and slot position.

Optionally, the resource mapping parameters of the CSI-RS include at least one of the following: number of ports, frequency domain density, starting position of frequency domain RBs, number of frequency domain RBs, frequency domain allocation, time domain Start position and code division multiplexing type.

It should be noted that the implementation of each module may also refer to corresponding descriptions of the method embodiments shown in FIGS. 6-9 , and execute the methods and functions performed by the network device in the foregoing embodiments.

FIG. 12 is a schematic structural diagram of a terminal device provided by an embodiment of the present application. The terminal device may be applied to the system shown in FIG. 1 to perform the functions of the terminal device in the foregoing method embodiments, or implement the steps or processes executed by the terminal device in the foregoing method embodiments.

As shown in FIG. 12 , the terminal device includes a processor 1201 and a transceiver 1202 . Optionally, the terminal device further includes a memory 1203 . Among them, the processor 1201, the transceiver 1202, and the memory 1203 can communicate with each other through an internal connection path, and transmit control and/or data signals. Call and run the computer program to control the transceiver 1202 to send and receive signals. Optionally, the terminal device may further include an antenna, configured to send the uplink data or uplink control signaling output by the transceiver 1202 through wireless signals.

The processor 1201 and the memory 1203 may be combined into a processing device, and the processor 1201 is configured to execute the program codes stored in the memory 1203 to realize the above functions. During specific implementation, the memory 1203 may also be integrated in the processor 1201 , or be independent of the processor 1201 . The processor 1201 may correspond to the processing module in FIG. 10 .

The above-mentioned transceiver 1202 may correspond to the receiving module and the sending module in FIG. 10 , and may also be called a transceiver unit or a transceiver module. The transceiver 1202 may include a receiver (or called a receiver, a receiving circuit) and a transmitter (or called a transmitter, a transmitting circuit). Among them, the receiver is used to receive signals, and the transmitter is used to transmit signals.

It should be understood that the terminal device shown in FIG. 12 can implement various processes involving the terminal device in the method embodiments shown in FIGS. 6 to 9 . The operations and/or functions of the various modules in the terminal device are respectively for realizing the corresponding processes in the foregoing method embodiments. For details, reference may be made to the descriptions in the foregoing method embodiments, and detailed descriptions are appropriately omitted here to avoid repetition.

The above-mentioned processor 1201 can be used to execute the actions implemented by the terminal device described in the previous method embodiments, and the transceiver 1202 can be used to execute the actions described in the previous method embodiments sent by the terminal device to the network device or received from the network device. action. For details, please refer to the description in the foregoing method embodiments, and details are not repeated here.

Wherein, the processor 1201 may be a central processing unit, a general processor, a digital signal processor, an application specific integrated circuit, a field programmable gate array or other programmable logic devices, transistor logic devices, hardware components or any combination thereof. It can implement or execute the various illustrative logical blocks, modules and circuits described in connection with the present disclosure. The processor 1201 may also be a combination that implements computing functions, for example, a combination of one or more microprocessors, a combination of a digital signal processor and a microprocessor, and the like. The communication bus 1204 may be a peripheral component interconnection standard PCI bus or an extended industry standard structure EISA bus or the like. The bus can be divided into address bus, data bus, control bus and so on. For ease of representation, only one thick line is used in FIG. 12 , but it does not mean that there is only one bus or one type of bus. The communication bus 1204 is used to realize connection communication between these components. Wherein, in the embodiment of the present application, the transceiver 1202 is used for signaling or data communication with other node devices. The memory 1203 may include a volatile memory, such as nonvolatile random access memory (nonvolatile random access memory, NVRAM), phase change random access memory (phase change RAM, PRAM), magnetoresistive random access memory (magetoresistive) RAM, MRAM), etc., can also include non-volatile memory, such as at least one magnetic disk storage device, electronically erasable programmable read-only memory (electrically erasable programmable read-only memory, EEPROM), flash memory device, such as anti-or flash memory (NOR flash memory) or NAND flash memory (NAND flash memory), semiconductor devices, such as solid state disk (solid state disk, SSD) and so on. Optionally, the memory 1203 may also be at least one storage device located away from the aforementioned processor 1201 . Optionally, a set of computer program codes or configuration information may also be stored in the memory 1203 . Optionally, the processor 1201 may also execute programs stored in the memory 1203 . The processor may cooperate with the memory and the transceiver to execute any method and function of the terminal device in the foregoing application embodiments.

FIG. 13 is a schematic structural diagram of a network device provided by an embodiment of the present application. The network device can be applied to the system shown in FIG. 1 to execute the functions of the network device in the above method embodiments, or implement the steps or processes performed by the network device in the above method embodiments.

As shown in FIG. 13 , the network device includes a processor 1301 and a transceiver 1302 . Optionally, the network device further includes a memory 1303 . Among them, the processor 1301, the transceiver 1302, and the memory 1303 can communicate with each other through an internal connection path, and transmit control and/or data signals. Call and run the computer program to control the transceiver 1302 to send and receive signals. Optionally, the network device may further include an antenna, configured to send the uplink data or uplink control signaling output by the transceiver 1302 through wireless signals.

The processor 1301 and the memory 1303 may be combined into a processing device, and the processor 1301 is configured to execute the program codes stored in the memory 1303 to realize the above functions. During specific implementation, the memory 1303 may also be integrated in the processor 1301 , or be independent of the processor 1301 . The processor 1301 may correspond to the processing module in FIG. 11 .

The above-mentioned transceiver 1302 may correspond to the receiving module and the sending module in FIG. 11 , and may also be called a transceiver unit or a transceiver module. The transceiver 1302 may include a receiver (or receiver, receiving circuit) and a transmitter (or transmitter, transmitting circuit). Among them, the receiver is used to receive signals, and the transmitter is used to transmit signals.

It should be understood that the network device shown in FIG. 13 can implement various processes involving the network device in the method embodiments shown in FIGS. 6 to 9 . The operations and/or functions of the various modules in the network device are respectively for realizing the corresponding processes in the foregoing method embodiments. For details, reference may be made to the descriptions in the foregoing method embodiments, and detailed descriptions are appropriately omitted here to avoid repetition.

The above-mentioned processor 1301 can be used to execute the actions internally implemented by the network device described in the previous method embodiments, and the transceiver 1302 can be used to execute the actions described in the previous method embodiments sent by the network device to the terminal device or received from the terminal device. action. For details, please refer to the description in the foregoing method embodiments, and details are not repeated here.

Wherein, the processor 1301 may be various types of processors mentioned above. The communication bus 1304 may be a peripheral component interconnection standard PCI bus or an extended industry standard structure EISA bus or the like. The bus can be divided into address bus, data bus, control bus and so on. For ease of representation, only one thick line is used in FIG. 13 , but it does not mean that there is only one bus or one type of bus. The communication bus 1304 is used to realize connection communication between these components. Wherein, the transceiver 1302 of the device in the embodiment of the present application is used for signaling or data communication with other devices. The memory 1303 may be various types of memory mentioned above. Optionally, the memory 1303 may also be at least one storage device located away from the aforementioned processor 1301 . A set of computer program codes or configuration information is stored in the memory 1303 , and the processor 1301 executes the programs in the memory 1303 . The processor may cooperate with the memory and the transceiver to execute any method and function of the network device in the foregoing application embodiments.

An embodiment of the present application also provides a chip system, which includes a processor, configured to support terminal devices or network devices to implement the functions involved in any of the above embodiments, such as generating or processing the First message and CSI-RS. In a possible design, the chip system may further include a memory, and the memory is used for necessary program instructions and data of a terminal device or a network device. The system-on-a-chip may consist of chips, or may include chips and other discrete devices. Wherein, the input and output of the chip system respectively correspond to the receiving and sending operations of the terminal device or the network device in the method embodiment.

The embodiment of the present application also provides a processing device, including a processor and an interface. The processor may be used to execute the methods in the foregoing method embodiments.

It should be understood that the above processing device may be a chip. For example, the processing device may be a field programmable gate array (field programmable gate array, FPGA), may be an application specific integrated circuit (ASIC), may also be a system chip (system on chip, SoC), or It can be a central processor unit (CPU), a network processor (network processor, NP), a digital signal processing circuit (digital signal processor, DSP), or a microcontroller (micro controller unit) , MCU), and may also be a programmable controller (programmable logic device, PLD) or other integrated chips.

In the implementation process, each step of the above method can be completed by an integrated logic circuit of hardware in a processor or an instruction in the form of software. The steps of the methods disclosed in connection with the embodiments of the present application may be directly implemented by a hardware processor, or implemented by a combination of hardware and software modules in the processor. The software module can be located in a mature storage medium in the field such as random access memory, flash memory, read-only memory, programmable read-only memory or electrically erasable programmable memory, register. The storage medium is located in the memory, and the processor reads the information in the memory, and completes the steps of the above method in combination with its hardware. To avoid repetition, no detailed description is given here.

It should be noted that the processor in the embodiment of the present application may be an integrated circuit chip, which has a signal processing capability. In the implementation process, each step of the above-mentioned method embodiments may be completed by an integrated logic circuit of hardware in a processor or instructions in the form of software. The above-mentioned processor may be a general-purpose processor, a digital signal processor (DSP), an application-specific integrated circuit (ASIC), a field-programmable gate array (FPGA) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components . Various methods, steps, and logic block diagrams disclosed in the embodiments of the present application may be implemented or executed. A general-purpose processor may be a microprocessor, or the processor may be any conventional processor, or the like. The steps of the method disclosed in connection with the embodiments of the present application may be directly implemented by a hardware decoding processor, or implemented by a combination of hardware and software modules in the decoding processor. The software module can be located in a mature storage medium in the field such as random access memory, flash memory, read-only memory, programmable read-only memory or electrically erasable programmable memory, register. The storage medium is located in the memory, and the processor reads the information in the memory, and completes the steps of the above method in combination with its hardware.

According to the method provided in the embodiment of the present application, the present application also provides a computer program product, the computer program product including: computer program code, when the computer program code is run on the computer, the computer is made to execute the computer program shown in Fig. 6 to Fig. 9 . The method of any one of the embodiments is illustrated.

According to the methods provided in the embodiments of the present application, the present application also provides a computer-readable medium, the computer-readable medium stores program codes, and when the program codes are run on a computer, the computer executes the steps shown in FIGS. 6 to 9 . The method of any one of the embodiments is illustrated.

According to the method provided in the embodiment of the present application, the present application further provides a system, which includes the foregoing one or more terminal devices and one or more network devices.

In the above embodiments, all or part of them may be implemented by software, hardware, firmware or any combination thereof. When implemented using software, it may be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions. When the computer instructions are loaded and executed on the computer, the processes or functions according to the embodiments of the present application will be generated in whole or in part. The computer can be a general purpose computer, a special purpose computer, a computer network, or other programmable devices. The computer instructions may be stored in or transmitted from one computer-readable storage medium to another computer-readable storage medium, for example, the computer instructions may be transmitted from a website, computer, server or data center Transmission to another website site, computer, server or data center by wired (such as coaxial cable, optical fiber, digital subscriber line (DSL)) or wireless (such as infrared, wireless, microwave, etc.). The computer-readable storage medium may be any available medium that can be accessed by a computer, or a data storage device such as a server or a data center integrated with one or more available media. The available medium may be a magnetic medium (for example, a floppy disk, a hard disk, a magnetic tape), an optical medium (for example, a high-density digital video disc (digital video disc, DVD)), or a semiconductor medium (for example, a solid state disk (solid state disc, SSD)) etc.

The network equipment in each of the above device embodiments corresponds to the terminal equipment and the network equipment or terminal equipment in the method embodiments, and the corresponding modules or units perform corresponding steps, such as the receiving module and the sending module (transceiver) in the method embodiments. The step of receiving or sending, other steps besides sending and receiving may be performed by a processing module (processor). For the functions of the specific modules, reference may be made to the corresponding method embodiments. Wherein, there may be one or more processors.

The terms "component", "module", "system" and the like are used in this specification to refer to a computer-related entity, hardware, firmware, a combination of hardware and software, software, or software in execution. For example, a component may be, but is not limited to being, a process running on a processor, a processor, an object, an executable, a thread of execution, a program, and/or a computer. By way of illustration, both an application running on a computing device and the computing device can be components. One or more components can reside within a process and/or thread of execution and a component can be localized on one computer and/or distributed between two or more computers. In addition, these components can execute from various computer readable media having various data structures stored thereon. A component may, for example, be based on a signal having one or more packets of data (e.g., data from two components interacting with another component between a local system, a distributed system, and/or a network, such as the Internet via a signal interacting with other systems). Communicate through local and/or remote processes.

Those of ordinary skill in the art can realize that various illustrative logical blocks (illustrative logical blocks) and steps (steps) described in conjunction with the embodiments disclosed herein can be implemented with electronic hardware, or a combination of computer software and electronic hardware. accomplish. Whether these functions are executed by hardware or software depends on the specific application and design constraints of the technical solution. Skilled artisans may use different methods to implement the described functions for each specific application, but such implementation should not be regarded as exceeding the scope of the present application.

Those skilled in the art can clearly understand that for the convenience and brevity of the description, the specific working process of the above-described system, device and unit can refer to the corresponding process in the foregoing method embodiment, which will not be repeated here.

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

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

In addition, each functional module in each embodiment of the present application may be integrated into one processing module, each module may exist separately physically, or two or more modules may be integrated into one module.

If the functions described above are realized in the form of software function units and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present application is essentially or the part that contributes to the prior art or the part of the technical solution can be embodied in the form of a software product, and the computer software product is stored in a storage medium, including Several instructions are used to make a computer device (which may be a personal computer, a server, or a network device, etc.) execute all or part of the steps of the methods described in the various embodiments of the present application. The aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (read-only memory, ROM), random access memory (random access memory, RAM), magnetic disk or optical disk and other various media that can store program codes. .

The above is only a specific implementation of the application, but the scope of protection of the application is not limited thereto. Anyone familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed in the application. Should be covered within the protection scope of this application. Therefore, the protection scope of the present application should be determined by the protection scope of the claims.

Claims (53)

1. A method of communicating a reference signal, the method comprising:

   the method comprises the steps that terminal equipment receives a first message sent by network equipment, wherein the first message comprises at least one of a system information block 1, a message 2 and a message 4;

   the terminal equipment determines the resource allocation of a channel state information reference signal (CSI-RS) according to the first message;

   and the terminal equipment receives the CSI-RS sent by the network equipment according to the resource configuration.
2. The method of claim 1, wherein the first message is sent with the CSI-RS.
3. The method of claim 1 or 2, wherein the determining, by the terminal device, the resource configuration of the CSI-RS from the first message comprises:

   the terminal equipment determines the resource configuration of the CSI-RS according to at least one of the physical downlink control channel PDCCH associated with the first message, the physical downlink shared channel PDSCH associated with the first message, a control resource set of the PDCCH associated with the first message, a search space of the PDCCH associated with the first message, a physical cell identifier associated with the first message and an index of a synchronous signal block SSB associated with the first message.
4. The method of claim 1 or 2, wherein the determining, by the terminal device, the resource configuration of the CSI-RS from the first message comprises:

   the terminal device determines the port number corresponding to the CSI-RS according to at least one of the maximum possible number of the synchronization signal blocks SSB associated with the first message, the time domain position of the synchronization signal blocks SSB associated with the first message, the carrier frequency range associated with the first message, the bandwidth of the search space of the PDCCH associated with the first message, and the random access response RAR protocol data packet PDU carried by the PDCCH associated with the first message and the PDSCH associated with the first message.
5. The method of claim 1 or 2, wherein the determining, by the terminal device, the resource configuration of the CSI-RS from the first message comprises:

   and the terminal equipment determines the number of the frequency domain Resource Blocks (RBs) of the CSI-RS according to at least one of the bandwidth of the search space of the PDCCH associated with the first message, the PDCCH associated with the first message and the PDSCH associated with the first message.
6. The method of claim 1 or 2, wherein the determining, by the terminal device, the resource configuration of the CSI-RS from the first message comprises:

   The terminal equipment determines the starting position of the frequency domain RB of the CSI-RS according to at least one of the starting position of the control resource set of the PDCCH associated with the first message, the starting position of the PDCCH associated with the first message, the ending position of the PDCCH associated with the first message, the starting position of the PDSCH associated with the first message and the ending position of the PDSCH associated with the first message.
7. The method of claim 1 or 2, wherein the determining, by the terminal device, the resource configuration of the CSI-RS from the first message comprises:

   and the terminal equipment determines the frequency domain allocation of the CSI-RS according to at least one of the physical cell identifier associated with the first message and the index of the SSB associated with the first message.
8. The method of claim 1 or 2, wherein the determining, by the terminal device, the resource configuration of the CSI-RS from the first message comprises:

   the terminal device determines a sequence corresponding to the CSI-RS according to at least one of an index of the SSB associated with the first message, a physical cell identifier associated with the first message, an index of a time slot of a control resource set of the PDCCH associated with the first message, an index of a time slot of the PDSCH associated with the first message, an index of a start or end Orthogonal Frequency Division Multiplexing (OFDM) symbol of the PDCCH control resource set associated with the first message, an index of a time slot where the CSI-RS is located, an index of a start or end OFDM symbol of the PDCCH associated with the first message, an index of a start or end OFDM symbol of the PDSCH associated with the first message, an index of an OFDM symbol where the CSI-RS is located, and a port number corresponding to the CSI-RS.
9. The method of claim 1 or 2, wherein the determining, by the terminal device, the resource configuration of the CSI-RS from the first message comprises:

   the terminal equipment determines a sequence corresponding to the CSI-RS according to at least one of random access radio network temporary identifier RA-RNTI associated with the first message, an index of a time slot of a random access opportunity associated with the first message, an index of a frequency of the random access opportunity associated with the first message, an index of a carrier wave where the random access opportunity associated with the first message is located, an index of partial bandwidth BWP where the random access opportunity associated with the first message is located, and an index of a starting OFDM symbol of the random access opportunity associated with the first message.
10. A method according to any of claims 1-9, wherein before the terminal device receives the first message sent by the network device, the method comprises:

    the terminal device sends a second message to the network device, where the second message includes at least one of an index of a synchronization signal block SSB and CSI-RS request information, and the at least one of the index of the SSB and CSI-RS request information is used to instruct the network device to send the CSI-RS in a sending slot of the first message.
11. The method of any of claims 1-10, wherein the resource configuration of the CSI-RS comprises at least one of: resource mapping parameters, sequence generation parameters, period and slot positions.
12. The method of claim 11, wherein the resource mapping parameters of the CSI-RS comprise at least one of: port number, frequency domain density, starting position of frequency domain RB, number of frequency domain RBs, frequency domain allocation, time domain starting position, and code division multiplexing type.
13. A method of communicating a reference signal, the method comprising:

    the network equipment determines the resource configuration of a channel state information reference signal (CSI-RS) according to a first message, wherein the first message comprises at least one of a system information block No. 1, a message 2 and a message 4;

    and the network equipment sends the first message and the CSI-RS to terminal equipment.
14. The method of claim 13, wherein the first message is sent with the CSI-RS.
15. The method of claim 13 or 14, wherein the network device determining the resource configuration of the channel state information reference signal, CSI-RS, from the first message comprises:

    The network device determines the resource configuration of the CSI-RS according to at least one of the physical downlink control channel PDCCH associated with the first message, the physical downlink shared channel PDSCH associated with the first message, the control resource set of the PDCCH associated with the first message, the search space of the PDCCH associated with the first message, the physical cell identifier associated with the first message, and the index of the synchronization signal block SSB associated with the first message.
16. The method of claim 13 or 14, wherein the network device determining the resource configuration of the channel state information reference signal, CSI-RS, from the first message comprises:

    the network device determines the port number corresponding to the CSI-RS according to at least one of the maximum possible number of the synchronization signal blocks SSB associated with the first message, the time domain position of the synchronization signal blocks SSB associated with the first message, the carrier frequency range associated with the first message, the bandwidth of the search space of the PDCCH associated with the first message, and the random access response RAR protocol data packet PDU carried by the PDCCH associated with the first message and the PDSCH associated with the first message.
17. The method of claim 13 or 14, wherein the network device determining the resource configuration of the channel state information reference signal, CSI-RS, from the first message comprises:

    The network device determines the number of frequency domain Resource Blocks (RBs) of the CSI-RS according to at least one of the bandwidth of the search space of the PDCCH associated with the first message, the PDCCH associated with the first message and the PDSCH associated with the first message.
18. The method of claim 13 or 14, wherein the network device determining the resource configuration of the channel state information reference signal, CSI-RS, from the first message comprises:

    the network device determines a starting position of a frequency domain RB of the CSI-RS according to at least one of a starting position of a control resource set of the PDCCH associated with the first message, a starting position of the PDCCH associated with the first message, an ending position of the PDCCH associated with the first message, a starting position of the PDSCH associated with the first message, and an ending position of the PDSCH associated with the first message.
19. The method of claim 13 or 14, wherein the network device determining the resource configuration of the channel state information reference signal, CSI-RS, from the first message comprises:

    the network device determines the frequency domain allocation of the CSI-RS according to at least one of the physical cell identifier associated with the first message and the index of the SSB associated with the first message.
20. The method of claim 13 or 14, wherein the network device determining the resource configuration of the channel state information reference signal, CSI-RS, from the first message comprises:

    the network device determines the sequence of the CSI-RS according to at least one of an index of the SSB associated with the first message, a physical cell identity associated with the first message, an index of a time slot of a control resource set of the PDCCH associated with the first message, an index of a time slot of the PDSCH associated with the first message, an index of a start or end Orthogonal Frequency Division Multiplexing (OFDM) symbol of the PDCCH control resource set associated with the first message, an index of a time slot where the CSI-RS is located, an index of a start or end OFDM symbol of the PDCCH associated with the first message, an index of a start or end OFDM symbol of the PDSCH associated with the first message, an index of an OFDM symbol where the CSI-RS is located, and a port number corresponding to the CSI-RS.
21. The method of claim 13 or 14, wherein the network device determining the resource configuration of the channel state information reference signal, CSI-RS, from the first message comprises:

    The network device determines the sequence of the CSI-RS according to at least one of the random access radio network temporary identity RA-RNTI associated with the first message, an index of a time slot of the random access opportunity associated with the first message, an index of a frequency of the random access opportunity associated with the first message, an index of a carrier on which the random access opportunity associated with the first message is located, an index of a partial bandwidth BWP on which the random access opportunity associated with the first message is located, and an index of a starting OFDM symbol of the random access opportunity associated with the first message.
22. The method of any of claims 13-21, wherein prior to the network device sending the first message and the CSI-RS to a terminal device, the method further comprises:

    the network equipment receives a second message sent by the terminal equipment, wherein the second message comprises at least one of an index of a synchronous signal block SSB and CSI-RS request information;

    the network device determines to transmit the CSI-RS in a transmission slot of the first message according to at least one of the index of the SSB and CSI-RS request information.
23. The method of any of claims 13-22, wherein the resource configuration of the CSI-RS comprises at least one of: resource mapping parameters, sequence generation parameters, period and slot positions.
24. The method of claim 23, wherein the resource mapping parameters of the CSI-RS comprise at least one of: port number, frequency domain density, starting position of frequency domain RB, number of frequency domain RBs, frequency domain allocation, time domain starting position, and code division multiplexing type.
25. A communication device, the device comprising:

    a receiving module, configured to receive a first message sent by a network device, where the first message includes at least one of a system information block No. 1, a message 2, and a message 4;

    the processing module is used for determining the resource configuration of a channel state information reference signal (CSI-RS) according to the first message;

    the receiving module is further configured to receive the CSI-RS sent by the network device according to the resource configuration.
26. The apparatus of claim 25, wherein the first message is sent with the CSI-RS.
27. The apparatus of claim 25 or 26, wherein the device comprises a plurality of sensors,

    the processing module is further configured to determine a resource configuration of the CSI-RS according to at least one of a physical downlink control channel PDCCH associated with the first message, a physical downlink shared channel PDSCH associated with the first message, a control resource set of the PDCCH associated with the first message, a search space of the PDCCH associated with the first message, a physical cell identifier associated with the first message, and an index of a synchronization signal block SSB associated with the first message.
28. The apparatus of claim 25 or 26, wherein the device comprises a plurality of sensors,

    the processing module is further configured to determine, according to at least one of a maximum possible number of synchronization signal blocks SSB associated with the first message, a time domain position of the synchronization signal blocks SSB associated with the first message, a carrier frequency range associated with the first message, a bandwidth of a search space of a PDCCH associated with the first message, and random access response RAR protocol data packet PDUs carried by the PDCCH associated with the first message and a PDSCH associated with the first message, a port number corresponding to the CSI-RS.
29. The apparatus of claim 25 or 26, wherein the device comprises a plurality of sensors,

    the processing module is further configured to determine, according to at least one of a bandwidth of a search space of the PDCCH associated with the first message, and the PDSCH associated with the first message, a number of frequency domain resource blocks RBs of the CSI-RS.
30. The apparatus of claim 25 or 26, wherein the device comprises a plurality of sensors,

    the processing module is further configured to determine a starting position of a frequency domain RB of the CSI-RS according to at least one of a starting position of a control resource set of the PDCCH associated with the first message, a starting position of the PDCCH associated with the first message, an ending position of the PDCCH associated with the first message, a starting position of the PDSCH associated with the first message, and an ending position of the PDSCH associated with the first message.
31. The apparatus of claim 25 or 26, wherein the device comprises a plurality of sensors,

    the processing module is further configured to determine a frequency domain allocation of the CSI-RS according to at least one of a physical cell identifier associated with the first message and an index of an SSB associated with the first message.
32. The apparatus of claim 25 or 26, wherein the device comprises a plurality of sensors,

    the processing module is further configured to determine a sequence corresponding to the CSI-RS according to at least one of an index of the SSB associated with the first message, a physical cell identifier associated with the first message, an index of a time slot of a control resource set of the PDCCH associated with the first message, an index of a time slot of the PDSCH associated with the first message, an index of a start or end orthogonal frequency division multiplexing OFDM symbol of the PDCCH control resource set associated with the first message, an index of a time slot where the CSI-RS is located, an index of a start or end OFDM symbol of the PDCCH associated with the first message, an index of a start or end OFDM symbol of the PDSCH associated with the first message, an index of an OFDM symbol where the CSI-RS is located, and a port number corresponding to the CSI-RS.
33. The apparatus of claim 25 or 26, wherein the device comprises a plurality of sensors,

    The processing module is further configured to determine a sequence corresponding to the CSI-RS according to at least one of the random access radio network temporary identifier RA-RNTI associated with the first message, an index of a time slot of the random access opportunity associated with the first message, an index of a frequency of the random access opportunity associated with the first message, an index of a carrier on which the random access opportunity associated with the first message is located, an index of a partial bandwidth BWP on which the random access opportunity associated with the first message is located, and an index of a starting OFDM symbol of the random access opportunity associated with the first message.
34. The apparatus of any one of claims 25-33, wherein the apparatus further comprises:

    a sending module, configured to send a second message to the network device, where the second message includes at least one of an index of a synchronization signal block SSB and CSI-RS request information, where the at least one of the index of the SSB and CSI-RS request information is used to instruct the network device to send the CSI-RS in a sending slot of the first message.
35. The apparatus of any of claims 25-34, wherein the resource configuration of the CSI-RS comprises at least one of: resource mapping parameters, sequence generation parameters, period and slot positions.
36. The apparatus of claim 35, wherein the resource mapping parameters for the CSI-RS comprise at least one of: port number, frequency domain density, starting position of frequency domain RB, number of frequency domain RBs, frequency domain allocation, time domain starting position, and code division multiplexing type.
37. A communication device, the device comprising:

    the processing module is used for determining the resource configuration of a channel state information reference signal (CSI-RS) according to a first message, wherein the first message comprises at least one of a system information block No. 1, a message 2 and a message 4;

    and the sending module is used for sending the first message and the CSI-RS to terminal equipment.
38. The apparatus of claim 37, wherein the first message is sent with the CSI-RS.
39. The apparatus of claim 37 or 38, wherein the device comprises a plurality of sensors,

    the processing module is further configured to determine, by the network device, a resource configuration of the CSI-RS according to at least one of the physical downlink control channel PDCCH associated with the first message, the physical downlink shared channel PDSCH associated with the first message, a control resource set of the PDCCH associated with the first message, a search space of the PDCCH associated with the first message, a physical cell identifier associated with the first message, and an index of the synchronization signal block SSB associated with the first message.
40. The apparatus of claim 37 or 38, wherein the device comprises a plurality of sensors,

    the processing module is further configured to determine, according to at least one of a maximum possible number of synchronization signal blocks SSB associated with the first message, a time domain position of the synchronization signal blocks SSB associated with the first message, a carrier frequency range associated with the first message, a bandwidth of a search space of a PDCCH associated with the first message, and random access response RAR protocol data packet PDUs carried by the PDCCH associated with the first message and a PDSCH associated with the first message, a port number corresponding to the CSI-RS.
41. The apparatus of claim 37 or 38, wherein the device comprises a plurality of sensors,

    the processing module is further configured to determine, according to at least one of a bandwidth of a search space of the PDCCH associated with the first message, and the PDSCH associated with the first message, a number of frequency domain resource blocks RBs of the CSI-RS.
42. The apparatus of claim 37 or 38, wherein the device comprises a plurality of sensors,

    the processing module is further configured to determine a starting position of a frequency domain RB of the CSI-RS according to at least one of a starting position of a control resource set of the PDCCH associated with the first message, a starting position of the PDCCH associated with the first message, an ending position of the PDCCH associated with the first message, a starting position of the PDSCH associated with the first message, and an ending position of the PDSCH associated with the first message.
43. The apparatus of claim 37 or 38, wherein the device comprises a plurality of sensors,

    the processing module is further configured to determine a frequency domain allocation of the CSI-RS according to at least one of a physical cell identifier associated with the first message and an index of an SSB associated with the first message.
44. The apparatus of claim 37 or 38, wherein the device comprises a plurality of sensors,

    the processing module is further configured to determine a sequence of the CSI-RS according to at least one of an index of the SSB associated with the first message, a physical cell identifier associated with the first message, an index of a time slot of a control resource set of the PDCCH associated with the first message, an index of a time slot of the PDSCH associated with the first message, an index of a start or end orthogonal frequency division multiplexing OFDM symbol of the PDCCH control resource set associated with the first message, an index of a time slot where the CSI-RS is located, an index of a start or end OFDM symbol of the PDCCH associated with the first message, an index of a start or end OFDM symbol of the PDSCH associated with the first message, an index of an OFDM symbol where the CSI-RS is located, and a port number corresponding to the CSI-RS.
45. The apparatus of claim 37 or 38, wherein the device comprises a plurality of sensors,

    The processing module is further configured to determine the sequence of the CSI-RS according to at least one of a random access radio network temporary identifier RA-RNTI associated with the first message, an index of a time slot of a random access opportunity associated with the first message, an index of a frequency of the random access opportunity associated with the first message, an index of a carrier on which the random access opportunity associated with the first message is located, an index of a partial bandwidth BWP on which the random access opportunity associated with the first message is located, and an index of a starting OFDM symbol of the random access opportunity associated with the first message.
46. The apparatus of any one of claims 37-45, wherein the apparatus further comprises:

    a receiving module, configured to receive a second message sent by the terminal device, where the second message includes at least one of an index of a synchronization signal block SSB and CSI-RS request information;

    the processing module is further configured to determine, according to at least one of the index of the SSB and CSI-RS request information, to transmit the CSI-RS in a transmission slot of the first message.
47. The apparatus of any of claims 37-46, wherein the resource configuration of the CSI-RS comprises at least one of: resource mapping parameters, sequence generation parameters, period and slot positions.
48. The apparatus of claim 47, wherein the resource mapping parameters for the CSI-RS comprise at least one of: port number, frequency domain density, starting position of frequency domain RB, number of frequency domain RBs, frequency domain allocation, time domain starting position, and code division multiplexing type.
49. An apparatus comprising a processor and a memory for storing instructions that are executable by the processor to cause the apparatus to perform the method of any one of claims 1 to 24.
50. A chip, characterized in that the chip is a chip in a network device or a terminal device, the chip comprising a processor and an input interface and an output interface connected to the processor, the chip further comprising a memory, the method of any of claims 1 to 24 being performed when the code is executed.
51. A computer readable storage medium storing instructions which, when executed on a computer, cause the computer to perform the method of any one of claims 1 to 24.
52. A computer program product comprising one or more computer instructions which, when run on a computer, cause the computer to perform the method of any one of claims 1 to 24.
53. A communication system, characterized in that the system comprises at least one terminal device and at least one network device, the terminal device performing the method of any of claims 1-12, the network device performing the method of any of claims 13-24.