Random access method, device, terminal and network side equipment

Abstract

The present application discloses a random access method, apparatus, terminal and network-side equipment, belonging to the field of communication technology. The method includes: the terminal determines the first signal-related parameters according to the terminal identification related information; the terminal sends the first signal according to the first signal-related parameters; wherein the first signal includes at least one of the sounding reference signal SRS and the preamble of the first random access message; the first signal-related parameters include at least one of the following: sequence identification information of the first signal; time domain resources of the first signal; frequency domain resources of the first signal. In an embodiment of the present application, the first signal sent by the terminal is associated with the terminal identification information, so that the network-side device can determine the terminal corresponding to the received first signal, and then can accurately communicate with the corresponding terminal subsequently.

Description

Technical Field

[0001] The present invention relates to the field of communication technology, and in particular to a random access method, device, terminal and network side equipment. Background Art

[0002] The cell free network system is composed of many access points (APs). User equipment (UE) communicates with one or more adjacent APs. When the UE moves between APs, the UE's service AP will change. When multiple UEs send the same information (such as preambles) to multiple APs, the network side device cannot determine which UE or UEs the information received by multiple APs comes from, which affects the communication between the network side and the terminal. Summary of the invention

[0003] The embodiments of the present application provide a random access method, apparatus, terminal and network-side equipment, which can solve the problem in the related art that the network-side equipment cannot determine which terminal the information received by multiple APs comes from.

[0004] In a first aspect, a random access method is provided, including:

[0005] The terminal determines the first signal related parameters according to the terminal identification related information;

[0006] The terminal sends the first signal according to the first signal related parameters;

[0007] The first signal includes at least one of a sounding reference signal SRS and a preamble of a first random access message;

[0008] The first signal-related parameter includes at least one of the following:

[0009] sequence identification information of the first signal;

[0010] time domain resources of the first signal;

[0011] The frequency domain resources of the first signal.

[0012] In a second aspect, a random access method is provided, including:

[0013] The network side device receives a first signal, wherein the first signal related parameter is associated with terminal identification related information, and the first signal includes at least one of a sounding reference signal SRS and a preamble code of a first random access message;

[0014] The first signal-related parameter includes at least one of the following:

[0015] sequence identification information of the first signal;

[0016] time domain resources of the first signal;

[0017] The frequency domain resources of the first signal.

[0018] In a third aspect, a random access device is provided, including:

[0019] A first determining module, used to determine a first signal related parameter according to terminal identification related information;

[0020] A first sending module, used for sending a first signal according to first signal related parameters;

[0021] The first signal includes at least one of a sounding reference signal SRS and a preamble of a first random access message;

[0022] The first signal-related parameter includes at least one of the following:

[0023] sequence identification information of the first signal;

[0024] time domain resources of the first signal;

[0025] The frequency domain resources of the first signal.

[0026] In a fourth aspect, a random access device is provided, including:

[0027] A second receiving module, configured to receive a first signal, wherein the first signal-related parameter is associated with terminal identity related information, and the first signal includes at least one of a sounding reference signal SRS and a preamble of a first random access message;

[0028] The first signal-related parameter includes at least one of the following:

[0029] sequence identification information of the first signal;

[0030] time domain resources of the first signal;

[0031] The frequency domain resources of the first signal.

[0032] In a fifth aspect, a terminal is provided, comprising a processor, a memory, and a program or instruction stored in the memory and executable on the processor, wherein the program or instruction, when executed by the processor, implements the steps of the method described in the first aspect.

[0033] In the sixth aspect, a network side device is provided, which includes a processor, a memory, and a program or instruction stored in the memory and executable on the processor, wherein the program or instruction, when executed by the processor, implements the steps of the method described in the second aspect.

[0034] In the seventh aspect, a readable storage medium is provided, on which a program or instruction is stored. When the program or instruction is executed by a processor, the steps of the method described in the first aspect are implemented, or the steps of the method described in the second aspect are implemented.

[0035] In an eighth aspect, a chip is provided, comprising a processor and a communication interface, wherein the communication interface is coupled to the processor, and the processor is used to run a program or instructions to implement the steps of the method described in the first aspect, or to implement the steps of the method described in the second aspect.

[0036] In an embodiment of the present application, the first signal sent by the terminal is associated with the terminal identification information, so that the network side device can determine the terminal corresponding to the received first signal, and can subsequently communicate accurately with the corresponding terminal. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Figure 1 A structural diagram showing a network system to which the embodiments of the present application can be applied;

[0038] Figure 2 A schematic diagram showing a flow chart of a random access method according to an embodiment of the present application;

[0039] Figure 3 A second flowchart of the random access method according to an embodiment of the present application is shown;

[0040] Figure 4 A schematic diagram showing a module of a random access device according to an embodiment of the present application;

[0041] Figure 5 A structural block diagram showing a communication device according to an embodiment of the present application;

[0042] Figure 6 A structural block diagram showing a terminal according to an embodiment of the present application;

[0043] Figure 7 A second schematic diagram of a module showing a random access device according to an embodiment of the present application;

[0044] Figure 8 A structural block diagram showing a network side device according to an embodiment of the present application. DETAILED DESCRIPTION

[0045] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field belong to the scope of protection of this application.

[0046] The terms "first", "second", etc. in the specification and claims of the present application are used to distinguish similar objects, and are not used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable under appropriate circumstances, so that the embodiments of the present application can be implemented in an order other than those illustrated or described here, and the objects distinguished by "first" and "second" are generally of the same type, and the number of objects is not limited. For example, the first object can be one or more. In addition, "and / or" in the specification and claims represents at least one of the connected objects, and the character " / " generally represents that the objects associated with each other are in an "or" relationship.

[0047] It is worth noting that the technology described in the embodiments of the present application is not limited to the Long Term Evolution (LTE) / LTE-Advanced (LTE-A) system, but can also be used in other wireless communication systems, such as Code Division Multiple Access (CDMA), Time Division Multiple Access (TDMA), Frequency Division Multiple Access (FDMA), Orthogonal Frequency Division Multiple Access (OFDMA), Single-carrier Frequency-Division Multiple Access (SC-FDMA) and other systems. The terms "system" and "network" in the embodiments of the present application are often used interchangeably, and the described technology can be used for the systems and radio technologies mentioned above, as well as for other systems and radio technologies. The following description describes a New Radio (NR) system for illustrative purposes, and NR terms are used in most of the following descriptions. These technologies can also be applied to applications other than NR system applications, such as the 6th generation (6 th Generation, 6G) communication system.

[0048] Figure 1A block diagram of a wireless communication system applicable to an embodiment of the present application is shown. The wireless communication system includes a terminal 11 and a network side device 12. Among them, the terminal 11 can also be called a terminal device or a user terminal (User Equipment, UE), and the terminal 11 can be a mobile phone, a tablet computer (Tablet Personal Computer), a laptop computer (Laptop Computer) or a notebook computer, a personal digital assistant (Personal Digital Assistant, PDA), a handheld computer, a netbook, an ultra-mobile personal computer (ultra-mobile personal computer, UMPC), a mobile Internet device (Mobile Internet Device, MID), a wearable device (Wearable Device) or a vehicle-mounted device (VUE), a pedestrian terminal (PUE) and other terminal side devices, and the wearable device includes: a bracelet, a headset, glasses, etc. It should be noted that the specific type of the terminal 11 is not limited in the embodiment of the present application. The network side device 12 can be a base station or a core network, wherein the base station can be referred to as a node B, an evolved node B, an access point, a base transceiver station (Base Transceiver Station, BTS), a radio base station, a radio transceiver, a basic service set (Basic Service Set, BSS), an extended service set (Extended Service Set, ESS), a B node, an evolved B node (eNB), a home B node, a home evolved B node, a WLAN access point, a WiFi node, a transmitting and receiving point (Transmitting Receiving Point, TRP) or some other suitable term in the field. As long as the same technical effect is achieved, the base station is not limited to a specific technical vocabulary. It should be noted that in the embodiment of the present application, only the base station in the NR system is taken as an example, but the specific type of the base station is not limited.

[0049] The random access method provided in the embodiment of the present application is described in detail below through specific embodiments and application scenarios in conjunction with the accompanying drawings.

[0050] The random access method of the embodiment of the present application can be applied to a cell free network system, which is composed of many APs. The UE communicates with one or more adjacent APs. When the UE moves between APs, the service AP of the UE changes.

[0051] like Figure 2 As shown, an embodiment of the present application provides a random access method, including:

[0052] Step 201: The terminal determines first signal-related parameters according to terminal identification-related information.

[0053] In the embodiment of the present application, the terminal identification related information includes at least one of the terminal identification and the last X bits of the terminal identification, where X is greater than or equal to 1. The terminal identification includes at least one of the following:

[0054] International Mobile Subscriber Identity (IMSI), International Mobile Equipment Identity (IMEI), Temporary Mobile Subscriber Identity (TMSI), 5G S-Temporary Mobile Subscription Identifier (5G-S-TMSI), Radio Network Temporary Identifier (RNTI) and a random number.

[0055] Of course, the terminal identifier may also be other types of terminal identifiers; or the terminal identifier may also be a number generated according to a certain rule or formula, where the rule or formula is defined by the protocol or notified to the terminal by the network side device.

[0056] Optionally, the terminal identification related information when the terminal is in an inactive state is different from the terminal identification related information when the terminal is in an idle state; for example, when the terminal is in an inactive state, the cell radio network temporary identifier (Cell RNTI, C-RNTI) can be used as the terminal identification related information; when the UE is in an idle state, IMSI or TMSI can be used as the terminal identification related information.

[0057] Optionally, the terminal identification related information when the terminal is in an inactive state is the same as the terminal identification related information when the terminal is in an idle state, for example, both are IMSI or TMSI.

[0058] For example, assume that there are four UE groups: Group 1, Group 2, Group 3, and Group 4. The UE group ID (UE_GROUP_ID) of each UE is calculated according to the following formula, and the UE group ID is used to select the preamble code.

[0059] UE_GROUP_ID=Floor[UE_ID / S];

[0060] Wherein, S represents the total number of UE groups, for example, S=4, the possible values ​​of UE group ID are 0, 1, 2 or 3, and S is defined by the protocol or indicated to the UE by the base station through signaling. For example, S is indicated to the UE through broadcast signaling. UE_ID is UE identification related information, for example, 5G-S-TMSI mod 1024.

[0061] Step 202: The terminal sends a first signal according to first signal related parameters.

[0062] Here, the first signal-related parameters are determined based on the terminal identification-related information, which can be understood as the first signal being associated with the terminal identification-related information. The first signal associated with the terminal identification-related information is sent to the network side device, so that the network side device can accurately determine the terminal corresponding to the received first signal, and the network side device can determine the location information of the terminal corresponding to the terminal identification-related information associated with the first signal, and then send a subsequent signal to the terminal based on the location information.

[0063] The first signal includes at least one of a sounding reference signal SRS and a preamble of a first random access message; the preamble of the first random access message may be a preamble of a message A of a two-step random access, or a preamble of a message 1 of a four-step random access.

[0064] The first signal-related parameter includes at least one of the following:

[0065] sequence identification information of the first signal;

[0066] time domain resources of the first signal;

[0067] The frequency domain resources of the first signal.

[0068] When the above-mentioned first signal is the preamble code of the first random access message, the sequence identification information of the above-mentioned first signal is the identification of the preamble code. If the identification of the preamble code is different, at least one of the scrambling sequence, initialization sequence, cyclic shift of the sequence, and orthogonal cover code included in the preamble code sequence information is different.

[0069] The preamble in the embodiment of the present application consists of a cyclic prefix (CP) and a preamble sequence.

[0070] In the random access method of the embodiment of the present application, the first signal sent by the terminal is associated with the terminal identification information, so that the network side device can determine the terminal corresponding to the received first signal, and then can accurately communicate with the corresponding terminal subsequently.

[0071] Optionally, the random access method in the embodiment of the present application further includes:

[0072] The terminal receives a second signal, where the second signal is sent by a network side device through at least one node after the network side device determines the location information of the terminal by receiving the first signal.

[0073] The second signal may be a two-step random access message B;

[0074] Alternatively, the second signal is at least one of message 2 and message 4 of four-step random access.

[0075] In an embodiment of the present application, the location information of the terminal corresponds to at least one of the beam, AP and TRP.

[0076] Optionally, when the first signal is a preamble of the first random access message:

[0077] The terminal determines the first signal-related parameter according to the terminal identification-related information, including:

[0078] Determine a random access channel opportunity RO according to information of the detected N1 third signals, wherein the RO is associated with at least one of a time domain resource and a frequency domain resource for transmitting a preamble code, the third signal includes at least one of a downlink reference signal and a synchronization signal, N1 is an integer greater than or equal to 1, and the N1 third signals are sent through the same or different nodes;

[0079] Selecting a preamble code from at least one preamble code corresponding to the RO according to the terminal identification related information;

[0080] Determine relevant parameters of the preamble of the first random access message according to the selected preamble.

[0081] In the embodiment of the present application, the relevant parameters of the preamble code of the first random access message are associated with at least one of the N downlink parameter signals and the synchronization signal, and with the terminal identification related information.

[0082] As an optional implementation manner, the terminal determines the RO associated with the N1 reference signals or synchronization signals according to the measurement results of the N1 reference signals or synchronization signals (specifically, it can be determined according to the association relationship shown in Table 1), and then selects a preamble code associated with the terminal identification information from all preamble codes corresponding to the RO;

[0083] As another optional implementation method, the terminal determines the RO (which can be specifically determined according to the association relationship shown in Table 1) and the preamble code candidate set associated with the N1 reference signals or synchronization signals based on the measurement results of the N1 reference signals or synchronization signals, and then selects a preamble code associated with the terminal identification information from the preamble code candidate set, and the above-mentioned preamble code candidate set is determined based on the preamble code associated with the RO.

[0084] Further optionally, the terminal group identifier is associated with a first preamble group identifier, the terminal group identifier is obtained according to the terminal identifier related information, and the first preamble group identifier is an identifier of the preamble group to which the selected preamble belongs.

[0085] Here, in the above two optional implementations, the preambles may be divided into M groups, each preamble group corresponds to a preamble group identifier. The group identifier to which the preamble associated with the terminal identifier information belongs is the same as the group identifier of the terminal.

[0086] Table 1

[0087]

[0088] The preamble identifier or preamble index is associated with the preamble sequence format (e.g., at least one of the sequence length, the subcarrier spacing SCS, and the root sequence);

[0089] Among them, each combination of {preamble code identifier, time domain resources of the preamble code, frequency domain resources of the preamble code} may include multiple combinations of values ​​of preamble code identifiers, time domain resources of the preamble code, and frequency domain resources of the preamble code, and the terminal can select one combination of values ​​of {preamble code identifier, time domain resources of the preamble code, frequency domain resources of the preamble code} from them.

[0090] The third signal includes at least one of the following:

[0091] Synchronization Signal and PBCH Block (SSB), CSI reference signal (CSI-RS), tracking reference signal (TRS), positioning reference signals (PRS), and other downlink reference signals.

[0092] Optionally, the N1 reference signals or synchronization signals (such as SSB) have different synchronization rasters;

[0093] Optionally, frequency domain resources (such as carriers or resource blocks RB) or time domain resources of the N1 reference signals or synchronization signals are different;

[0094] Optionally, the terminal determines N1 information related to message 1 and sends multiple messages 1 according to the information of the detected N1 reference signals or synchronization signals, or determines N1 information related to message A and sends multiple messages A;

[0095] Optionally, the sequence formats of the N1 reference signals or synchronization signals are different;

[0096] Optionally, the N1 reference signals or synchronization signals are sent through the same or different AP / TRPs (e.g., the AP / TRP(s) associated with the N SSBs are different);

[0097] Optionally, the terminal determines beam information for sending message 1 or message A based on information of N1 detected reference signals or synchronization signals.

[0098] The information of N1 reference signals or synchronization signals is determined by the following method:

[0099] Information of N1 reference signals or synchronization signals measured by the UE, wherein the measured information includes at least one of a reference signal received power (RSRP), a signal-to-noise and interference ratio (SINR), and a reference signal received quality (RSRQ), wherein the measured RSRP, SINR, and / or RSRQ are all greater than or equal to a first threshold, and / or the difference between RSRP, SINR, and RSRQ is less than or equal to a second threshold; wherein the first threshold and the second threshold are notified to the UE by the network side device through a system message.

[0100] Optionally, the random access method in the embodiment of the present application further includes:

[0101] Determine N2 path loss values ​​according to the detected reference signal received powers RSRP of N2 third signals, where the third signal includes at least one of a downlink reference signal and a synchronization signal, and N2 is an integer greater than or equal to 1;

[0102] Determine the transmission power of the first signal according to the N2 path loss values.

[0103] Specifically, the real values ​​of N2 path loss values ​​are added to obtain a sum, and then the log of the sum with a base of 10 is taken to obtain a target path loss value; and then the transmission power of the first signal is calculated based on the target path loss value.

[0104] Here, the RSRP of multiple third signals associated with the first signal is considered. For example, if the multiple SSBs are sent through multiple APs, the transmit power of the first signal needs to consider the path loss from the multiple APs to the terminal. For example, the transmit power of message A of the two-step random access is determined based on the path loss from the multiple APs to the terminal, or the transmit power of message 1 of the four-step random access is determined.

[0105] If the first signal is retransmitted (such as message A retransmission, or message 1 retransmission), the retransmission transmission power is increased according to the number of retransmissions. If the SSB index is changed when message A is retransmitted, the power is not increased.

[0106] Optionally, the random access method in the embodiment of the present application further includes:

[0107] Determine a transmission carrier of the first signal according to measurement information of the detected N3 third signals, where N3 is an integer greater than or equal to 1;

[0108] The third signal includes at least one of a downlink reference signal and a synchronization signal, and the measurement information includes at least one of the following:

[0109] RSRP;

[0110] Signal to Interference plus Noise Ratio SINR;

[0111] Reference signal received quality RSRQ.

[0112] In the embodiment of the present application, if the UE is configured by the base station with multiple uplink carriers (for example, a high frequency carrier and a low frequency carrier) to send message 1 (or message A), if the RSRP, SINR and / or RSRQ of the N3 third signals are all less than the third threshold, the UE sends MSG1 through the target carrier (for example, a carrier with a lower frequency); otherwise, the message 1 (or message A) is sent through another carrier (for example, a carrier with a higher frequency);

[0113] The method for determining the random access RNTI (RA-RNTI) is as follows: the RA-RNTI calculation formula is related to the carrier through which the message 1 (or message A) is sent, for example, related to the carrier ID;

[0114] In addition, in an embodiment of the present application, the method for determining the beam of message A or message 1 includes: if the frequency range is FR2, message A or message 1 needs to be sent to two TRPs or APs respectively through two beams of a panel or two beams of two panels.

[0115] Optionally, sending the first signal includes:

[0116] A two-step random access message A is sent, where the message A includes a preamble and a physical uplink shared channel PUSCH.

[0117] Optionally, sending the first signal further includes:

[0118] Sending an SRS before or after the PUSCH;

[0119] Alternatively, the SRS is sent during the process of sending the PUSCH.

[0120] In an embodiment of the present application, terminal identification related information is associated with SRS, and the association rule is defined by the protocol. The time domain resources and frequency domain resources of SRS are the same as the time domain resources and frequency domain resources of PUSCH, or the time domain resources and frequency domain resources of SRS are notified to the terminal by the network side device.

[0121] Optionally, the second signal is a two-step random access message B;

[0122] Before receiving the second signal, the method further includes:

[0123] receiving a fourth signal;

[0124] Wherein, the fourth signal is quasi co-location (QCL) with a DMRS of a two-step random access message B;

[0125] The fourth signal is a synchronization signal block SSB or a tracking reference signal TRS, or the fourth signal is the strongest SSB or downlink reference signal detected by the terminal.

[0126] Here, the network side device assists the terminal in receiving the above-mentioned message B by sending the above-mentioned fourth signal.

[0127] Optionally, sending the first signal includes:

[0128] Send message 1 of the four-step random access.

[0129] Optionally, the receiving the second signal includes:

[0130] Message 2 of four-step random access is received, where message 2 includes relevant parameters of the preamble code of message 1.

[0131] The transmission parameters of the message 2 are determined by the network side device according to the location information of the terminal corresponding to the first signal, and the transmission parameters include at least one of the transmission node identifier and the beam.

[0132] Optionally, the message 2 indicates at least one of a time domain position and a frequency domain position corresponding to receiving the message 4 by the terminal.

[0133] Optionally, message 2 indicates the time-frequency domain resources and transmission format of message 3.

[0134] In an embodiment of the present application, if the terminal successfully receives a message 2 (decoded using RA-RNTI), and the preamble code identifier in the message 2 is the same as the preamble code identifier sent by the terminal, it is considered that the message 2 is successfully received. At this time, the terminal can stop monitoring the message 2.

[0135] If the terminal does not receive message 2, or receives message 2 but message 2 does not carry the preamble identifier, the terminal retransmits message 1.

[0136] Here, the transmission format of the message 1 is the same as the transmission format of the previously transmitted message 1; the transmission power of the retransmitted message 1 is higher than the transmission power of the initial transmission.

[0137] Optionally, the random access method in the embodiment of the present application further includes:

[0138] If the preamble code identifier in the preamble code related parameters carried in the message 2 is the same as the identifier of the preamble code sent by the terminal, a message 3 for four-step random access is sent.

[0139] Optionally, sending the first signal further includes:

[0140] Before or after the message 3, sending an SRS;

[0141] Alternatively, the SRS is sent on at least one symbol of the time slot where the message 3 is located.

[0142] In an embodiment of the present application, the terminal identification related information is associated with the SRS, and the association rule is defined by the protocol. The time domain resources and frequency domain resources of the SRS are the same as the time domain resources and frequency domain resources of the PUSCH, or the time domain resources and frequency domain resources of the SRS are notified to the terminal by the network side device through message 2.

[0143] Optionally, the random access method in the embodiment of the present application further includes:

[0144] receiving a fifth signal;

[0145] Among them, the fifth signal is quasi-co-located with the DMRS of message 4 of the four-step random access, the fifth signal is a synchronization signal block SSB or a tracking reference signal TRS, or the fifth signal is the DMRS of message 2.

[0146] In the embodiment of the present application, the network side device can determine the location information of the corresponding terminal according to the above SRS, determine the transmission parameters of message 4 according to the location information, and send message 4 based on the determined transmission parameters. Before sending the message 4, the above fifth signal is sent to the terminal to assist the terminal in receiving message 4.

[0147] Optionally, before the above step 201, the method further includes:

[0148] The terminal receives a signaling from a network device, such as a system information block (SIB), indicating at least one of the following:

[0149] Multiple transmission node information (such as ID information), where the transmission node may be a cell, a TRP and / or an AP;

[0150] Transmit node location information (can be encrypted);

[0151] The SSB, CSI-RS or TRS information associated with each transmission node, such as the sequence information of the signal, the time-frequency resources of the signal, etc.

[0152] The SIB is a SIB sent by a cell, TRP or AP, or is sent via a SFN (Single Frequency Network).

[0153] Optionally, before the above step 201, the method further includes:

[0154] The terminal receives the random access channel RACH resources indicated by the network side device through signaling, such as SIB. For example, in the cell free scenario, the SIB contains information about shared RACH resources corresponding to multiple surrounding cells, TRPs or APs; wherein the SIB is a SIB sent by a cell, TRP or AP, or is sent through an SFN (single frequency network).

[0155] Optionally, the network side device may broadcast multiple frequency point information of RACH resources through SIB, and the terminal may select a frequency point from the multiple frequency points for RACH transmission, for example, select a frequency point for RACH transmission according to the measured SSB RSRP size.

[0156] In an embodiment of the present application, the first signal sent by the terminal is associated with the terminal identification information, so that the network side device can determine the terminal corresponding to the received first signal, and then determine the location information of the terminal corresponding to the first signal, and then adjust the transmission parameters of the subsequent signals (message 2, message 4 or message B) according to the location information of the terminal, such as transmission node or beam information, to reduce potential interference between APs or TRPs and improve the signal reception quality of subsequent signals.

[0157] like Figure 3 As shown, the embodiment of the present application also provides a random access method, including:

[0158] Step 301: A network-side device receives a first signal, wherein a parameter related to the first signal is associated with information related to a terminal identifier, and the first signal includes at least one of a sounding reference signal SRS and a preamble code of a first random access message.

[0159] Here, the terminal identification related information has been described in detail in the random access method embodiment on the terminal side, and will not be repeated here.

[0160] The network side device in this step may refer to an AP or a TRP.

[0161] In the random access method of the embodiment of the present application, the first signal is associated with the terminal identification information. The network side device can determine the terminal corresponding to the received first signal, and then determine the location information of the terminal corresponding to the first signal, and then adjust the transmission parameters of the subsequent signals (such as message 2, message 4 or message B) according to the location information of the terminal, such as transmission node or beam information, to reduce potential interference between APs or TRPs and improve the signal reception quality of subsequent signals.

[0162] Optionally, the random access method in the embodiment of the present application further includes:

[0163] The network side device determines the location information of the terminal corresponding to the first signal.

[0164] The network side device in this step may specifically refer to a central processing unit connected to multiple APs or TRPs, and the central processing unit determines the location information of the corresponding terminal based on the first signal received by the multiple APs or TRPs.

[0165] The network-side device determines, according to the location information of the terminal, a transmission parameter of the second signal, where the transmission parameter of the second signal includes at least one of the following: identification information of at least one node that sends the second signal, and beam information that sends the second signal;

[0166] The first signal-related parameter includes at least one of the following:

[0167] sequence identification information of the first signal;

[0168] time domain resources of the first signal;

[0169] The frequency domain resources of the first signal.

[0170] Optionally, the random access method in the embodiment of the present application further includes:

[0171] The network side device sends the second signal to the terminal through at least one node according to the transmission parameters of the second signal.

[0172] The second signal may be a two-step random access message B;

[0173] Alternatively, the second signal is at least one of message 2 and message 4 of four-step random access.

[0174] Optionally, determining a transmission parameter of the second signal according to the location information of the terminal includes:

[0175] Determining a first transmission parameter corresponding to the location information of the terminal according to a correspondence between the terminal location information and the transmission parameter;

[0176] The first transmission parameter is determined as the transmission parameter of the second signal.

[0177] In the embodiment of the present application, the correspondence between the terminal location information and the transmission parameters can be determined specifically through Table 2, Table 3 and / or Table 4.

[0178] Table 2

[0179] UE location information Beam information Position 1 Beam 1 of cell 1 (e.g. with SSB1 QCL) Position 2 Beam 2 of Cell 1 (with SSB2 QCL) Location 3 Beam 3 of Cell 1 (with SSB3 QCL) Position 4 Beam 4 of Cell 1 (with SSB4 QCL)

[0180] Table 3

[0181] UE location information AP / TRP Information Position 1 AP / TRP 1 Position 2 AP / TRP 1, AP / TRP 2 Location 3 AP / TRP 2 Position 4 AP / TRP 3

[0182] Table 4

[0183]

[0184] As an optional implementation manner, the receiving the first signal includes:

[0185] A two-step random access message A is received, where the message A includes a preamble and a PUSCH.

[0186] Here, after the network side device successfully receives message A, it can determine the location information of the corresponding terminal, and determine at least one of the transmission nodes and beams associated with the location information, and send message B based on at least one of the transmission nodes and beams.

[0187] Optionally, the receiving the first signal further includes:

[0188] Before or after the PUSCH, receiving an SRS;

[0189] Alternatively, the SRS is received on at least one symbol of the time slot where the PUSCH is located.

[0190] Here, if the terminal receives SRS in addition to message A, it can determine the location information of the corresponding terminal based on the SRS or message A, and determine at least one of the transmission nodes and beams associated with the location information, and send message B based on at least one of the transmission nodes and beams.

[0191] Optionally, the second signal is a two-step random access message B;

[0192] Before sending the second signal, the method further includes:

[0193] sending a fourth signal through the node;

[0194] The fourth signal is quasi co-located with a demodulation reference signal DMRS QCL of a two-step random access message B;

[0195] The fourth signal is a synchronization signal block SSB or a tracking reference signal TRS.

[0196] In an embodiment of the present application, before the terminal receives message B, the network side device may also send the above-mentioned fourth signal to the terminal through the corresponding node according to the determined transmission parameters of message B to assist the terminal in receiving message B.

[0197] As another optional implementation manner, the receiving the first signal includes:

[0198] Receive message 1 of the four-step random access.

[0199] Optionally, the sending the second signal includes:

[0200] Send a four-step random access message 2, where the message 2 includes relevant parameters of the preamble code of the message 1.

[0201] In an embodiment of the present application, after the network side device successfully receives the above-mentioned message 1, the location information of the corresponding terminal is determined according to message 1, and the transmission parameters of message 2 are determined according to the determined location information, and message 2 is sent to the corresponding terminal based on the transmission parameters.

[0202] Optionally, the message 2 indicates that the terminal receives at least one of a time domain position and a frequency domain position corresponding to the message 4 to reduce interference.

[0203] Optionally, message 2 indicates the time-frequency domain resources and transmission format of message 3.

[0204] Optionally, the random access method in the embodiment of the present application further includes:

[0205] Message 3 of the four-step random access is received, where the message 3 is sent by the terminal when a preamble identifier in a preamble-related parameter carried in message 2 is the same as an identifier of a preamble sent by the terminal.

[0206] Optionally, acquiring the first signal further includes:

[0207] Before or after the message 3, receiving an SRS;

[0208] Alternatively, an SRS is received on at least one symbol of the time slot where the message 3 is located.

[0209] Optionally, the random access method in the embodiment of the present application further includes:

[0210] Send a four-step random access message 4.

[0211] In an embodiment of the present application, if the terminal receives SRS in addition to message 1, the location information of the corresponding terminal can be determined based on the SRS or message 1, and at least one of the transmission nodes and beams associated with the location information can be determined, and message 4 can be sent based on at least one of the transmission nodes and beams.

[0212] Optionally, before sending the message 4 of the four-step random access, the method further includes:

[0213] sending a fifth signal through the node;

[0214] The fifth signal is quasi-co-located with the DMRS of the message 4, the fifth signal is the DMRS of the message 2 of the four-step random access, or the fourth signal is SSB or TRS.

[0215] In an embodiment of the present application, before the terminal receives message 4, the network side device may also send the above-mentioned fifth signal to the terminal through the corresponding node according to the determined transmission parameters of message 4 to assist the terminal in receiving message 4.

[0216] In the random access method of the embodiment of the present application, the first signal is associated with the terminal identification information. The network side device can determine the terminal corresponding to the received first signal, and then determine the location information of the terminal corresponding to the first signal, and then adjust the transmission parameters of the subsequent signals (such as message 2, message 4 or message B) according to the location information of the terminal, such as transmission node or beam information, to reduce potential interference between APs or TRPs and improve the signal reception quality of subsequent signals.

[0217] It should be noted that the random access method provided in the embodiment of the present application may be executed by a random access device, or a control module in the random access device for executing the random access method. In the embodiment of the present application, the random access device provided in the embodiment of the present application is described by taking the random access device executing the random access method as an example.

[0218] like Figure 4As shown, the embodiment of the present application further provides a random access device 400, including:

[0219] A first determining module 401 is used to determine a first signal related parameter according to terminal identification related information;

[0220] A first sending module 402, configured to send a first signal according to first signal related parameters;

[0221] The first signal includes at least one of a sounding reference signal SRS and a preamble of a first random access message;

[0222] The first signal-related parameter includes at least one of the following:

[0223] sequence identification information of the first signal;

[0224] time domain resources of the first signal;

[0225] The frequency domain resources of the first signal.

[0226] The random access device in the embodiment of the present application further includes:

[0227] The first receiving module is used to receive a second signal, where the second signal is sent by a network side device through at least one node after the network side device determines the location information of the terminal by receiving the first signal.

[0228] In the random access device of the embodiment of the present application, when the first signal is a preamble of the first random access message:

[0229] The first determining module comprises:

[0230] A first determination submodule is configured to determine a random access channel opportunity RO according to information of the detected N1 third signals, wherein the RO is associated with at least one of a time domain resource and a frequency domain resource for transmitting a preamble code, the third signal includes at least one of a downlink reference signal and a synchronization signal, N1 is an integer greater than or equal to 1, and the N1 third signals are sent through the same or different nodes;

[0231] A selection submodule, configured to select a preamble code from at least one preamble code corresponding to the RO according to the terminal identification related information;

[0232] The second determining submodule is used to determine relevant parameters of the preamble code of the first random access message according to the selected preamble code.

[0233] In the random access device of the embodiment of the present application, the group identifier of the terminal is associated with the first preamble group identifier, the group identifier of the terminal is obtained according to the terminal identifier related information, and the first preamble group identifier is the identifier of the preamble group to which the selected preamble belongs.

[0234] The random access device in the embodiment of the present application further includes:

[0235] a fourth determination module, configured to determine N2 path loss values ​​according to the reference signal received power RSRP of the detected N2 third signals, where the third signal includes at least one of a downlink reference signal and a synchronization signal, and N2 is an integer greater than or equal to 1;

[0236] A fifth determination module is used to determine the transmission power of the first signal according to the N2 path loss values.

[0237] The random access device in the embodiment of the present application further includes:

[0238] a sixth determination module, configured to determine a transmission carrier of the first signal according to measurement information of the detected N3 third signals, where N3 is an integer greater than or equal to 1;

[0239] The third signal includes at least one of a downlink reference signal and a synchronization signal, and the measurement information includes at least one of the following:

[0240] RSRP;

[0241] Signal to Interference plus Noise Ratio SINR;

[0242] Reference signal received quality RSRQ.

[0243] In the random access device of the embodiment of the present application, the first sending module is used to send a message A for two-step random access, where the message A includes a preamble and a physical uplink shared channel PUSCH.

[0244] In the random access device of the embodiment of the present application, the first sending module is further configured to send an SRS before or after the PUSCH;

[0245] Alternatively, the SRS is sent on at least one symbol of the time slot where the PUSCH is located.

[0246] In the random access device of the embodiment of the present application, the second signal is a two-step random access message B, and the device further includes:

[0247] A third receiving module, configured to receive a fourth signal before the first receiving module receives the second signal;

[0248] The fourth signal is quasi co-located with a demodulation reference signal DMRS QCL of a two-step random access message B;

[0249] The fourth signal is a synchronization signal block SSB or a tracking reference signal TRS.

[0250] In the random access device of the embodiment of the present application, the first sending module is used to send a message 1 of the four-step random access.

[0251] In the random access device of the embodiment of the present application, the first receiving module is used to receive message 2 of the four-step random access, and the message 2 includes relevant parameters of the preamble code of message 1.

[0252] The random access device in the embodiment of the present application further includes:

[0253] The third sending module is used to send a message 3 of four-step random access if the preamble code identifier in the relevant parameters of the preamble code carried by the message 2 is the same as the identifier of the preamble code sent by the terminal.

[0254] In the random access device of the embodiment of the present application, the first sending module is further configured to send an SRS before or after the message 3;

[0255] Alternatively, the SRS is sent on at least one symbol of the time slot where the message 3 is located.

[0256] The random access device in the embodiment of the present application further includes:

[0257] A fourth receiving module, configured to receive a fifth signal;

[0258] Among them, the fifth signal is quasi-co-located with the DMRS of message 4 of the four-step random access, the fifth signal is a synchronization signal block SSB or a tracking reference signal TRS, or the fifth signal is the DMRS of message 2.

[0259] In the random access device of the embodiment of the present application and the random access method of the embodiment of the present application, the first signal sent by the terminal is associated with the terminal identification information, so that the network side device can determine the terminal corresponding to the received first signal, and can subsequently communicate accurately with the corresponding terminal.

[0260] The random access device in the embodiment of the present application may be a device, or a component, integrated circuit, or chip in a terminal. The device may be a mobile terminal or a non-mobile terminal. For example, the mobile terminal may include but is not limited to the types of terminals 11 listed above, and the non-mobile terminal may be a server, a network attached storage (Network Attached Storage, NAS), a personal computer (personal computer, PC), a television (television, TV), a teller machine or a self-service machine, etc., which is not specifically limited in the embodiment of the present application.

[0261] The random access device in the embodiment of the present application may be a device having an operating system. The operating system may be an Android operating system, an iOS operating system, or other possible operating systems, which are not specifically limited in the embodiment of the present application.

[0262] The random access device provided in the embodiment of the present application can achieve Figure 2 The various processes implemented in the method embodiment achieve the same technical effect and will not be described again here to avoid repetition.

[0263] Optional, such as Figure 5 As shown, the embodiment of the present application also provides a communication device 500, including a processor 501, a memory 502, and a program or instruction stored in the memory 502 and executable on the processor 501. For example, when the communication device 500 is a terminal, the program or instruction is executed by the processor 501 to implement the various processes of the random access method embodiment applied to the terminal, and the same technical effect can be achieved. When the communication device 500 is a network side device, the program or instruction is executed by the processor 501 to implement the various processes of the random access method embodiment applied to the network side device, and the same technical effect can be achieved. To avoid repetition, it will not be repeated here.

[0264] Figure 6 To implement a hardware structure diagram of a terminal in an embodiment of the present application, the terminal 600 includes but is not limited to: a radio frequency unit 601, a network module 602, an audio output unit 603, an input unit 604, a sensor 605, a display unit 606, a user input unit 607, an interface unit 608, a memory 609, and a processor 610 and other components.

[0265] Those skilled in the art will appreciate that the terminal 600 may also include a power source (such as a battery) for supplying power to various components, and the power source may be logically connected to the processor 610 through a power management system, thereby implementing functions such as managing charging, discharging, and power consumption management through the power management system. Figure 6The terminal structure shown in the figure does not constitute a limitation on the terminal. The terminal may include more or fewer components than shown in the figure, or combine certain components, or arrange the components differently, which will not be described in detail here.

[0266] It should be understood that in the embodiment of the present application, the input unit 604 may include a graphics processor (Graphics Processing Unit, GPU) 6041 and a microphone 6042, and the graphics processor 6041 processes the image data of the static picture or video obtained by the image capture device (such as a camera) in the video capture mode or the image capture mode. The display unit 606 may include a display panel 6061, and the display panel 6061 may be configured in the form of a liquid crystal display, an organic light emitting diode, etc. The user input unit 607 includes a touch panel 6071 and other input devices 6072. The touch panel 6071 is also called a touch screen. The touch panel 6071 may include two parts: a touch detection device and a touch controller. Other input devices 6072 may include, but are not limited to, a physical keyboard, function keys (such as volume control keys, switch keys, etc.), a trackball, a mouse, and a joystick, which will not be repeated here.

[0267] In the embodiment of the present application, the radio frequency unit 601 receives downlink data from the network side device and sends it to the processor 610 for processing; in addition, the uplink data is sent to the network side device. Generally, the radio frequency unit 601 includes but is not limited to an antenna, at least one amplifier, a transceiver, a coupler, a low noise amplifier, a duplexer, etc.

[0268] The memory 609 can be used to store software programs or instructions and various data. The memory 609 can mainly include a program or instruction storage area and a data storage area, wherein the program or instruction storage area can store an operating system, an application program or instruction required for at least one function (such as a sound playback function, an image playback function, etc.), etc. In addition, the memory 609 can include a high-speed random access memory, and can also include a non-volatile memory, wherein the non-volatile memory can be a read-only memory (Read-Only Memory, ROM), a programmable read-only memory (Programmable ROM, PROM), an erasable programmable read-only memory (Erasable PROM, EPROM), an electrically erasable programmable read-only memory (Electrically EPROM, EEPROM) or a flash memory. For example, at least one disk storage device, a flash memory device, or other non-volatile solid-state storage devices.

[0269] The processor 610 may include one or more processing units; optionally, the processor 610 may integrate an application processor and a modem processor, wherein the application processor mainly processes an operating system, a user interface, and application programs or instructions, etc., and the modem processor mainly processes wireless communications, such as a baseband processor. It is understandable that the modem processor may not be integrated into the processor 610.

[0270] The processor 610 is used to: determine the first signal related parameters according to the terminal identification related information; and control the radio frequency unit 601 to send the first signal according to the first signal related parameters;

[0271] The first signal includes at least one of a sounding reference signal SRS and a preamble of a first random access message;

[0272] The first signal-related parameter includes at least one of the following:

[0273] sequence identification information of the first signal;

[0274] time domain resources of the first signal;

[0275] The frequency domain resources of the first signal.

[0276] Optionally, the radio frequency unit 601 is further configured to:

[0277] A second signal is received, where the second signal is sent by the network side device through at least one node after the network side device determines the location information of the terminal by receiving the first signal.

[0278] Optionally, when the first signal is a preamble of the first random access message:

[0279] The processor 610 is configured to determine a random access channel opportunity RO according to information of the detected N1 third signals, wherein the RO is associated with at least one of a time domain resource and a frequency domain resource for transmitting a preamble code, the third signal includes at least one of a downlink reference signal and a synchronization signal, N1 is an integer greater than or equal to 1, and the N1 third signals are sent through the same or different nodes;

[0280] Selecting a preamble code from at least one preamble code corresponding to the RO according to the terminal identification related information;

[0281] Determine relevant parameters of the preamble of the first random access message according to the selected preamble.

[0282] Optionally, the terminal group identifier is associated with a first preamble group identifier, the terminal group identifier is obtained according to the terminal identifier related information, and the first preamble group identifier is an identifier of the preamble group to which the selected preamble belongs.

[0283] Optionally, the processor 610 is further configured to:

[0284] Determine N2 path loss values ​​according to the detected reference signal received powers RSRP of N2 third signals, where the third signal includes at least one of a downlink reference signal and a synchronization signal, and N2 is an integer greater than or equal to 1;

[0285] Determine the transmission power of the first signal according to the N2 path loss values.

[0286] Optionally, the processor 610 is further configured to:

[0287] Determine a transmission carrier of the first signal according to measurement information of the detected N3 third signals, where N3 is an integer greater than or equal to 1;

[0288] The third signal includes at least one of a downlink reference signal and a synchronization signal, and the measurement information includes at least one of the following:

[0289] RSRP;

[0290] Signal to Interference plus Noise Ratio SINR;

[0291] Reference signal received quality RSRQ.

[0292] Optionally, the radio frequency unit 601 is further configured to:

[0293] A two-step random access message A is sent, where the message A includes a preamble and a physical uplink shared channel PUSCH.

[0294] Optionally, the radio frequency unit 601 is further configured to:

[0295] Sending an SRS before or after the PUSCH;

[0296] Alternatively, the SRS is sent on at least one symbol of the time slot where the PUSCH is located.

[0297] Optionally, the second signal is a two-step random access message B;

[0298] The radio frequency unit 601 is further used for:

[0299] receiving a fourth signal before receiving the second signal;

[0300] The fourth signal is quasi co-located with a demodulation reference signal DMRS QCL of a two-step random access message B;

[0301] The fourth signal is a synchronization signal block SSB or a tracking reference signal TRS.

[0302] Optionally, the radio frequency unit 601 is configured to send a message 1 of a four-step random access.

[0303] Optionally, the radio frequency unit 601 is used to receive message 2 of four-step random access, where message 2 includes relevant parameters of the preamble code of message 1.

[0304] Optionally, the radio frequency unit 601 is further configured to send a message 3 of four-step random access if the preamble code identifier in the relevant parameters of the preamble code carried by the message 2 is the same as the identifier of the preamble code sent by the terminal.

[0305] Optionally, the radio frequency unit 601 is further configured to send an SRS before or after the message 3;

[0306] Alternatively, the SRS is sent on at least one symbol of the time slot where the message 3 is located.

[0307] Optionally, the radio frequency unit 601 is further configured to receive a fifth signal;

[0308] Among them, the fifth signal is quasi-co-located with the DMRS of message 4 of the four-step random access, the fifth signal is a synchronization signal block SSB or a tracking reference signal TRS, or the fifth signal is the DMRS of message 2.

[0309] In the terminal of the embodiment of the present application and the random access method of the embodiment of the present application, the first signal sent by the terminal is associated with the terminal identification information, so that the network side device can determine the terminal corresponding to the received first signal, and can then accurately communicate with the corresponding terminal.

[0310] like Figure 7 As shown, the embodiment of the present application further provides a random access device 700, including:

[0311] A second receiving module 701 is configured to receive a first signal, wherein the first signal-related parameter is associated with terminal identity related information, and the first signal includes at least one of a sounding reference signal SRS and a preamble of a first random access message;

[0312] The first signal-related parameter includes at least one of the following:

[0313] sequence identification information of the first signal;

[0314] time domain resources of the first signal;

[0315] The frequency domain resources of the first signal.

[0316] The random access device in the embodiment of the present application further includes:

[0317] A second determining module, used to determine the location information of the terminal corresponding to the first signal;

[0318] A third determination module is used to determine a transmission parameter of a second signal according to the location information of the terminal, where the transmission parameter of the second signal includes at least one of the following: identification information of at least one node that sends the second signal, and beam information for sending the second signal;

[0319] The second sending module is used to send the second signal to the terminal through at least one node according to the transmission parameters of the second signal.

[0320] In the random access device of the embodiment of the present application, the third determination module includes:

[0321] A third determination submodule, configured to determine a first transmission parameter corresponding to the location information of the terminal according to a correspondence between the terminal location information and the transmission parameter;

[0322] The fourth determining submodule is used to determine the first transmission parameter as the transmission parameter of the second signal.

[0323] In the random access device of the embodiment of the present application, the second receiving module is used to receive a message A of the two-step random access, where the message A includes a preamble and a PUSCH.

[0324] In the random access device of the embodiment of the present application, the second receiving module is further configured to receive an SRS before or after the PUSCH;

[0325] Alternatively, the SRS is received on at least one symbol of the time slot where the PUSCH is located.

[0326] In the random access device of the embodiment of the present application, the second signal is a two-step random access message B; the device further includes:

[0327] A fourth sending module, configured to send a fourth signal through a node before the second sending module sends the second signal;

[0328] The fourth signal is quasi co-located with a demodulation reference signal DMRS QCL of a two-step random access message B;

[0329] The fourth signal is a synchronization signal block SSB or a tracking reference signal TRS.

[0330] In the random access device of the embodiment of the present application, the second receiving module is used to receive a message 1 of the four-step random access.

[0331] In the random access device of the embodiment of the present application, the second sending module is used to send message 2 of the four-step random access, and the message 2 includes relevant parameters of the preamble code of message 1.

[0332] The random access device in the embodiment of the present application further includes:

[0333] The fifth receiving module is used to receive message 3 of four-step random access, where the message 3 is sent by the terminal when the preamble code identifier in the relevant parameters of the preamble code carried in message 2 is the same as the identifier of the preamble code sent by the terminal.

[0334] In the random access device of the embodiment of the present application, the second receiving module is further configured to receive an SRS before or after the message 3;

[0335] Alternatively, an SRS is received on at least one symbol of the time slot where the message 3 is located.

[0336] The random access device in the embodiment of the present application further includes:

[0337] The fifth sending module is used to send a message 4 of the four-step random access.

[0338] The random access device in the embodiment of the present application further includes:

[0339] A sixth sending module, configured to send a fifth signal through a node before the fifth sending module sends the message 4 of the four-step random access;

[0340] The fifth signal is quasi-co-located with the DMRS of the message 4, the fifth signal is the DMRS of the message 2 of the four-step random access, or the fourth signal is SSB or TRS.

[0341] In the random access device of the embodiment of the present application, the first signal is associated with the terminal identification information. The network side device can determine the terminal corresponding to the received first signal, and then determine the location information of the terminal corresponding to the first signal, and then adjust the transmission parameters of the subsequent signals (such as message 2, message 4 or message B) according to the location information of the terminal, such as transmission node or beam information, to reduce potential interference between APs or TRPs and improve the signal reception quality of subsequent signals.

[0342] Specifically, the embodiment of the present application also provides a network side device. Figure 8As shown, the network device 800 includes: an antenna 801, a radio frequency device 802, and a baseband device 803. The antenna 801 is connected to the radio frequency device 802. In the uplink direction, the radio frequency device 802 receives information through the antenna 801 and sends the received information to the baseband device 803 for processing. In the downlink direction, the baseband device 803 processes the information to be sent and sends it to the radio frequency device 802. The radio frequency device 802 processes the received information and sends it out through the antenna 801.

[0343] The frequency band processing device may be located in the baseband device 803 . The method performed by the network-side device in the above embodiment may be implemented in the baseband device 803 . The baseband device 803 includes a processor 804 and a memory 805 .

[0344] The baseband device 803 may include, for example, at least one baseband board on which a plurality of chips are arranged. Figure 8 As shown, one of the chips is, for example, a processor 804, which is connected to a memory 805 to call a program in the memory 805 to execute the network device operations shown in the above method embodiment.

[0345] The baseband device 803 may further include a network interface 806 for exchanging information with the radio frequency device 802 , and the interface may be, for example, a common public radio interface (CPRI for short).

[0346] Specifically, the network side device of the embodiment of the present invention further includes: an instruction or program stored in the memory 805 and executable on the processor 804, and the processor 804 calls the instruction or program in the memory 805 to execute Figure 7 The methods executed by the modules shown achieve the same technical effects, and therefore will not be described here in detail to avoid repetition.

[0347] An embodiment of the present application also provides a readable storage medium, on which a program or instruction is stored. When the program or instruction is executed by a processor, each process of the above-mentioned multicast service transmission method embodiment is implemented, and the same technical effect can be achieved. To avoid repetition, it will not be repeated here.

[0348] The processor is the processor in the terminal described in the above embodiment. The readable storage medium includes a computer readable storage medium, such as a computer read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk.

[0349] An embodiment of the present application further provides a chip, which includes a processor and a communication interface, wherein the communication interface is coupled to the processor, and the processor is used to run programs or instructions to implement the various processes of the above-mentioned multicast service transmission method embodiment, and can achieve the same technical effect. To avoid repetition, it will not be repeated here.

[0350] It should be understood that the chip mentioned in the embodiments of the present application can also be called a system-level chip, a system chip, a chip system or a system-on-chip chip, etc.

[0351] It should be noted that, in this article, the terms "comprise", "include" or any other variant thereof are intended to cover non-exclusive inclusion, so that the process, method, article or device including a series of elements includes not only those elements, but also includes other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise one..." do not exclude the presence of other identical elements in the process, method, article or device including the element. In addition, it should be pointed out that the scope of the methods and devices in the embodiments of the present application is not limited to performing functions in the order shown or discussed, and may also include performing functions in a substantially simultaneous manner or in reverse order according to the functions involved, for example, the described method may be performed in an order different from that described, and various steps may also be added, omitted, or combined. In addition, the features described with reference to certain examples may be combined in other examples.

[0352] Through the description of the above implementation methods, those skilled in the art can clearly understand that the above-mentioned embodiment methods can be implemented by means of software plus a necessary general hardware platform, and of course by hardware, but in many cases the former is a better implementation method. Based on such an understanding, the technical solution of the present application, or the part that contributes to the prior art, can be embodied in the form of a software product, which is stored in a storage medium (such as ROM / RAM, a disk, or an optical disk), and includes a number of instructions for a terminal (which can be a mobile phone, a computer, a server, or a network device, etc.) to execute the methods described in each embodiment of the present application.

[0353] The embodiments of the present application are described above in conjunction with the accompanying drawings, but the present application is not limited to the above-mentioned specific implementation methods. The above-mentioned specific implementation methods are merely illustrative and not restrictive. Under the guidance of the present application, ordinary technicians in this field can also make many forms without departing from the purpose of the present application and the scope of protection of the claims, all of which are within the protection of the present application.

Claims

1. A random access method, characterized in that: include: The terminal determines the first signal related parameters according to the terminal identification related information; The terminal sends the first signal according to the first signal related parameters; The first signal includes at least one of a sounding reference signal SRS and a preamble of a first random access message; The first signal-related parameter includes at least one of the following: sequence identification information of the first signal; time domain resources of the first signal; The frequency domain resources of the first signal.

2. The random access method according to claim 1, characterized in that: Also includes: The terminal receives a second signal, where the second signal is sent by a network side device through at least one node after the network side device determines the location information of the terminal by receiving the first signal.

3. The random access method according to claim 1, characterized in that: In the case where the first signal is a preamble of the first random access message: The terminal determines the first signal-related parameter according to the terminal identification-related information, including: Determine a random access channel opportunity RO according to information of the detected N1 third signals, wherein the RO is associated with at least one of a time domain resource and a frequency domain resource for transmitting a preamble code, the third signal includes at least one of a downlink reference signal and a synchronization signal, N1 is an integer greater than or equal to 1, and the N1 third signals are sent through the same or different nodes; Selecting a preamble code from at least one preamble code corresponding to the RO according to the terminal identification related information; Determine relevant parameters of the preamble of the first random access message according to the selected preamble.

4. The random access method according to claim 3, characterized in that: The terminal group identifier is associated with a first preamble group identifier, the terminal group identifier is obtained according to the terminal identifier-related information, and the first preamble group identifier is an identifier of the preamble group to which the selected preamble belongs.

5. The random access method according to claim 1, characterized in that: Also includes: Determine N2 path loss values ​​according to the detected reference signal received powers RSRP of N2 third signals, where the third signal includes at least one of a downlink reference signal and a synchronization signal, and N2 is an integer greater than or equal to 1; Determine the transmission power of the first signal according to the N2 path loss values.

6. The random access method according to claim 1, characterized in that: Also includes: Determine a transmission carrier of the first signal according to measurement information of the detected N3 third signals, where N3 is an integer greater than or equal to 1; The third signal includes at least one of a downlink reference signal and a synchronization signal, and the measurement information includes at least one of the following: RSRP; Signal to Interference plus Noise Ratio SINR; Reference signal received quality RSRQ.

7. The random access method according to claim 2, characterized in that: The sending of the first signal comprises: A two-step random access message A is sent, where the message A includes a preamble and a physical uplink shared channel PUSCH.

8. The random access method according to claim 7, characterized in that: The sending of the first signal further comprises: Sending an SRS before or after the PUSCH; Alternatively, the SRS is sent on at least one symbol of the time slot where the PUSCH is located.

9. The random access method according to claim 7, characterized in that: The second signal is a two-step random access message B; Before receiving the second signal, the method further includes: receiving a fourth signal; The fourth signal is quasi co-located with a demodulation reference signal DMRS QCL of a two-step random access message B; The fourth signal is a synchronization signal block SSB or a tracking reference signal TRS.

10. The random access method according to claim 2, characterized in that: The sending of the first signal comprises: Send message 1 of the four-step random access.

11. The random access method according to claim 10, characterized in that: The receiving the second signal comprises: Message 2 of four-step random access is received, where message 2 includes relevant parameters of the preamble code of message 1.

12. The random access method according to claim 11, characterized in that: Also includes: If the preamble code identifier in the preamble code related parameters carried in the message 2 is the same as the identifier of the preamble code sent by the terminal, a message 3 for four-step random access is sent.

13. The random access method according to claim 12, characterized in that: The sending of the first signal further includes: Before or after the message 3, sending an SRS; Alternatively, the SRS is sent on at least one symbol of the time slot where the message 3 is located.

14. The random access method according to claim 13, characterized in that: Also includes: receiving a fifth signal; Among them, the fifth signal is quasi-co-located with the DMRS of message 4 of the four-step random access, the fifth signal is a synchronization signal block SSB or a tracking reference signal TRS, or the fifth signal is the DMRS of message 2.

15. A random access method, characterized in that: include: The network side device receives a first signal, wherein the first signal related parameter is associated with terminal identification related information, and the first signal includes at least one of a sounding reference signal SRS and a preamble code of a first random access message; The first signal-related parameter includes at least one of the following: sequence identification information of the first signal; time domain resources of the first signal; The frequency domain resources of the first signal.

16. The random access method according to claim 15, characterized in that: Also includes: The network side device determines the location information of the terminal corresponding to the first signal; The network side device determines, according to the location information of the terminal, a transmission parameter of the second signal, where the transmission parameter of the second signal includes at least one of the following: identification information of at least one node that sends the second signal, and beam information that sends the second signal; The network side device sends the second signal to the terminal through at least one node according to the transmission parameters of the second signal.

17. The random access method according to claim 16, characterized in that: The determining, according to the location information of the terminal, a transmission parameter of the second signal includes: Determining a first transmission parameter corresponding to the location information of the terminal according to a correspondence between the terminal location information and the transmission parameter; The first transmission parameter is determined as the transmission parameter of the second signal.

18. The random access method according to claim 16, characterized in that: The receiving a first signal comprises: A two-step random access message A is received, where the message A includes a preamble and a PUSCH.

19. The random access method according to claim 18, characterized in that: The receiving of the first signal further comprises: Before or after the PUSCH, receiving an SRS; Alternatively, the SRS is received on at least one symbol of the time slot where the PUSCH is located.

20. The random access method according to claim 18, characterized in that: The second signal is a two-step random access message B; Before sending the second signal, the method further includes: sending a fourth signal through the node; The fourth signal is quasi co-located with a demodulation reference signal DMRS QCL of a two-step random access message B; The fourth signal is a synchronization signal block SSB or a tracking reference signal TRS.

21. The random access method according to claim 16, characterized in that: The receiving a first signal comprises: Receive message 1 of the four-step random access.

22. The random access method according to claim 21, characterized in that: The sending the second signal comprises: Send a four-step random access message 2, where the message 2 includes relevant parameters of the preamble code of the message 1.

23. The random access method according to claim 22, characterized in that: Also includes: Message 3 of the four-step random access is received, where the message 3 is sent by the terminal when a preamble identifier in a preamble-related parameter carried in message 2 is the same as an identifier of a preamble sent by the terminal.

24. The random access method according to claim 23, characterized in that: The receiving the first signal further comprises: Before or after the message 3, receiving an SRS; Alternatively, an SRS is received on at least one symbol of the time slot where the message 3 is located.

25. The random access method according to claim 23, characterized in that: Also includes: Send a four-step random access message 4.

26. The random access method according to claim 25, characterized in that: Before sending the message 4 of the four-step random access, the method further includes: sending a fifth signal through the node; The fifth signal is quasi-co-located with the DMRS of the message 4, the fifth signal is the DMRS of the message 2 of the four-step random access, or the fifth signal is SSB or TRS.

27. A random access device, characterized in that: include: A first determining module, used to determine a first signal related parameter according to terminal identification related information; A first sending module, used for sending a first signal according to first signal related parameters; The first signal includes at least one of a sounding reference signal SRS and a preamble of a first random access message; The first signal-related parameter includes at least one of the following: sequence identification information of the first signal; time domain resources of the first signal; The frequency domain resources of the first signal.

28. The random access device according to claim 27, characterized in that: Also includes: The first receiving module is used to receive a second signal, where the second signal is sent by a network side device through at least one node after the network side device determines the location information of the terminal by receiving the first signal.

29. The random access device according to claim 27, characterized in that: In the case where the first signal is a preamble of the first random access message: The first determining module comprises: A first determination submodule is configured to determine a random access channel opportunity RO according to information of the detected N1 third signals, wherein the RO is associated with at least one of a time domain resource and a frequency domain resource for transmitting a preamble code, the third signal includes at least one of a downlink reference signal and a synchronization signal, N1 is an integer greater than or equal to 1, and the N1 third signals are sent through the same or different nodes; A selection submodule, configured to select a preamble code from at least one preamble code corresponding to the RO according to the terminal identification related information; The second determining submodule is used to determine relevant parameters of the preamble code of the first random access message according to the selected preamble code.

30. A random access device, characterized in that: include: A second receiving module, configured to receive a first signal, wherein the first signal-related parameter is associated with terminal identity related information, and the first signal includes at least one of a sounding reference signal SRS and a preamble of a first random access message; The first signal-related parameter includes at least one of the following: sequence identification information of the first signal; time domain resources of the first signal; The frequency domain resources of the first signal.

31. The random access device according to claim 30, characterized in that: Also includes: A second determining module, used to determine the location information of the terminal corresponding to the first signal; A third determination module is used to determine a transmission parameter of a second signal according to the location information of the terminal, where the transmission parameter of the second signal includes at least one of the following: identification information of at least one node that sends the second signal, and beam information for sending the second signal; The second sending module is used to send the second signal to the terminal through at least one node according to the transmission parameters of the second signal.

32. The random access device according to claim 31, characterized in that: The third determination module comprises: A third determination submodule, configured to determine a first transmission parameter corresponding to the location information of the terminal according to a correspondence between the terminal location information and the transmission parameter; The fourth determining submodule is used to determine the first transmission parameter as the transmission parameter of the second signal.

33. A terminal, characterized in that: The method comprises a processor, a memory, and a program or instruction stored in the memory and executable on the processor, wherein the program or instruction, when executed by the processor, implements the steps of the random access method according to any one of claims 1 to 14.

34. A network side device, characterized in that: It comprises a processor, a memory, and a program or instruction stored in the memory and executable on the processor, wherein when the program or instruction is executed by the processor, the steps of the random access method as described in any one of claims 15 to 26 are implemented.

35. A readable storage medium storing a program or instruction, wherein the program or instruction, when executed by a processor, implements the steps of the random access method as described in any one of claims 1 to 14, or implements the steps of the random access method as described in any one of claims 15 to 26.

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