CN120111707A

CN120111707A - Random access method, communication device, storage medium and program product

Info

Publication number: CN120111707A
Application number: CN202410728266.1A
Authority: CN
Inventors: 李剑; 刘星; 韩祥辉; 郝鹏; 石靖
Original assignee: ZTE Corp
Current assignee: ZTE Corp
Priority date: 2024-06-05
Filing date: 2024-06-05
Publication date: 2025-06-06

Abstract

The present disclosure provides a random access method, a communication device, a storage medium and a program product, which relate to the field of communication technology and can solve the problem of poor random access effect in related technologies. The method includes: receiving a target synchronization signal block in at least one synchronization signal block; at least one synchronization signal block is associated with multiple random access configuration information; obtaining random access configuration information associated with the target synchronization signal block; and performing random access based on the random access configuration information associated with the target synchronization signal block. The present disclosure can meet different communication requirements of terminals and improve the random access effect.

Description

Random access method, communication device, storage medium, and program product

Technical Field

The present disclosure relates to the field of communications technologies, and in particular, to a random access method, a communication device, a storage medium, and a program product.

Background

In a mobile communication scenario, a terminal generally searches for a synchronization signal sent by a base station after power-on, performs cell time-frequency synchronization, and then obtains information about parameters related to a network, such as bandwidth, frame structure, etc., by reading a system information block on a broadcast channel, thereby performing random access operation.

Terminals within the coverage area of the base station currently adopt the same random access configuration to perform random access, for example, the same Physical Random Access Channel (PRACH) format (format), the same subcarrier spacing, the same power control parameters, and the like. However, the communication quality of different terminals often varies, which results in that the random access configuration used when some terminals access randomly is not matched with the actual communication quality, and the random access effect is poor.

Disclosure of Invention

The embodiment of the disclosure provides a random access method, a communication device, a storage medium and a program product, which can solve the problem of poor random access effect in the related art.

In one aspect, a random access method is provided, including:

receiving a target synchronization signal block in at least one synchronization signal block, wherein the at least one synchronization signal block is associated with a plurality of random access configuration information;

acquiring random access configuration information associated with the target synchronous signal block;

And performing random access based on the random access configuration information associated with the target synchronous signal block.

In yet another aspect, there is provided a random access method, including:

and transmitting a target synchronization signal block in at least one synchronization signal block, wherein the at least one synchronization signal block is associated with a plurality of random access configuration information.

In yet another aspect, a first node is provided, comprising a processing unit and a communication unit;

The communication unit is used for receiving a target synchronous signal block in at least one synchronous signal block, wherein the at least one synchronous signal block is associated with a plurality of random access configuration information;

the communication unit is also used for acquiring random access configuration information associated with the target synchronous signal block;

The processing unit is used for carrying out random access based on the random access configuration information associated with the target synchronous signal block.

In yet another aspect, a second node is provided, comprising a communication unit;

The communication unit is configured to transmit a target synchronization signal block of at least one synchronization signal block, where the at least one synchronization signal block is associated with a plurality of random access configuration information.

In yet another aspect, a communication device is provided, including a memory and a processor, the memory and the processor being coupled, the memory being configured to store a computer program, the processor implementing the method of any of the embodiments described above when executing the computer program.

In yet another aspect, a computer readable storage medium is provided, on which computer program instructions are stored which, when executed by a processor, implement a method as described in any of the embodiments above.

In a further aspect, a computer program product is provided, comprising computer program instructions which, when executed by a processor, implement the method according to any of the embodiments described above.

In the embodiment of the disclosure, the first node may receive the target synchronization signal block in the at least one synchronization signal block, thereby obtaining the random access configuration information associated with the target synchronization signal block, and then the first node may perform random access based on the random access configuration information associated with the target synchronization signal block. The method and the device have the advantages that the at least one synchronous signal block is associated with the plurality of pieces of random access configuration information, so that the configuration of a plurality of sets of random access configuration information in a network is realized by establishing the association relation between the synchronous signal block and the random access configuration information, a first node in the network can perform random access through different pieces of random access configuration information, different communication requirements of the first node are met, and the access effect of the first node for executing random access is improved.

Drawings

In order to more clearly illustrate the technical solutions of the present disclosure, the drawings that need to be used in some embodiments of the present disclosure will be briefly described below, and it is apparent that the drawings in the following description are only drawings of some embodiments of the present disclosure, and other drawings may be obtained according to these drawings to those of ordinary skill in the art.

Fig. 1 is a scene diagram of a sectorized cell provided by some embodiments of the present disclosure;

FIG. 2 is a scene graph of a beam sweep provided by some embodiments of the present disclosure;

fig. 3 is a mapping diagram of a synchronization signal block and a random access opportunity provided in some embodiments of the present disclosure;

fig. 4 is an architecture diagram of a communication system provided by some embodiments of the present disclosure;

fig. 5 is a flowchart of a random access method according to some embodiments of the present disclosure;

Fig. 6 is a diagram of correspondence between a synchronization signal block and a system information block according to some embodiments of the present disclosure;

Fig. 7 is a diagram of a correspondence between a synchronization signal block and a system information block according to some embodiments of the present disclosure;

Fig. 8 is a flow chart of yet another random access method provided by some embodiments of the present disclosure;

fig. 9 is a schematic block diagram of random access configuration information according to some embodiments of the present disclosure;

fig. 10 is a block diagram of still another random access configuration information provided in some embodiments of the present disclosure;

fig. 11 is a block diagram of still another random access configuration information provided in some embodiments of the present disclosure;

fig. 12 is a block diagram of still another random access configuration information provided in some embodiments of the present disclosure;

Fig. 13 is a diagram showing a correspondence between a synchronization signal block and a random access opportunity according to some embodiments of the present disclosure;

fig. 14 is a mapping diagram of a synchronization signal block and a random access opportunity provided in some embodiments of the present disclosure;

Fig. 15 is a diagram of a correspondence between random access configuration information and random access opportunities according to some embodiments of the present disclosure;

Fig. 16 is a mapping diagram of a random access opportunity provided by some embodiments of the present disclosure;

fig. 17 is a flowchart of a random access method provided in some embodiments of the present disclosure;

FIG. 18 is a block diagram of a first node provided by some embodiments of the present disclosure;

FIG. 19 is a block diagram of a second node provided by some embodiments of the present disclosure;

fig. 20 is a block diagram of a communication device according to some embodiments of the present disclosure.

Detailed Description

The following description of the technical solutions in the present disclosure will be made clearly and completely with reference to the accompanying drawings in the present disclosure, and it is apparent that the described embodiments are only some embodiments of the present disclosure, not all embodiments. Based on the embodiments in this disclosure, all other embodiments that a person of ordinary skill in the art would obtain without making any inventive effort are within the scope of protection of this disclosure.

It is noted that in this disclosure, words such as "exemplary" or "such as" are used to mean serving as examples, illustrations, or descriptions. Any embodiment or design described herein as "exemplary" or "for example" should not be construed as preferred or advantageous over other embodiments or designs. Rather, the use of words such as "exemplary" or "such as" is intended to present related concepts in a concrete fashion.

The terms "first" and "second" are used below for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature.

In the description of the present disclosure, unless otherwise indicated, "/" means "or" and, for example, a/B may mean a or B. The term "and/or" herein is merely an association relation describing the association object, and means that three kinds of relations may exist, for example, a and/or B may mean that a exists alone, a and B exist together, and B exists alone. Furthermore, "at least one" means one or more, and "a plurality" means two or more.

Current communication systems provide targeted network deployment schemes in the face of critical application scenarios such as enhanced mobile broadband (enhance mobile broadband, eMBB), ultra-reliable low-latency communication (ultra reliable and low latency communication, URLLC), and large-scale machine-type communication (MASSIVE MACHINE TYPE communication, mMTC) to meet complex and diverse communication requirements.

The initial random access process of the terminal mainly comprises the following two processes.

1. And a cell searching process, wherein the terminal performs cell searching and performs downlink synchronization after searching a proper cell, the terminal determines a cell ID and an aligned downlink frame boundary by detecting a main synchronization signal (primary synchronization signal, PPS)/a secondary synchronization signal (secondary synchronization signal, SSS), and then acquires a main information block (master information block, MIB) by detecting a physical broadcast channel (physical broadcast channel, PBCH), and the terminal acquires a system frame number and a field indication from the MIB, thereby completing radio frame timing and field timing. Meanwhile, the terminal determines the time slot and the symbol of the current synchronous signal through the synchronous signal block (synchronization signal block, SSB) index in the MIB message and the pattern of the synchronous broadcast block set used by the current frequency band, thereby completing the time slot timing. In the new radio, NR, the PSS, SSS and MIB are contained in the SSB.

2. And in the uplink synchronization process, the terminal completes uplink synchronization with the base station through a random access process. The terminal acquires MIB message in the cell search process, and then blindly detects downlink control information (downlink control information, DCI) 1_0 based on the configuration of CORESET0 _0 in MIB. Wherein CORESET is a set of control resources corresponding to the search space of the system information block (systeminformation block, SIB). In this way, the terminal may receive the physical downlink shared channel (physical downlink SHARED CHANNEL, PDSCH) to obtain system information, including SIB1 and other SIB messages. SIB1 is used to configure Random Access Channel (RACH) parameter configuration information in a random access procedure. In a 5G NR system, system information (other systeminformation, OSI) other than MIB/SIB1 may not be transmitted by means of periodic broadcasting, but may trigger broadcasting of a specific type of system information by a base station based on a request of a terminal, i.e., on-demand (on-demand) transmission. The OSI request may be implemented by PRACH, msg3 or wake-up signal (WUS) triggers.

The base station generally provides mobile communication services in the form of cells (cells). Such as conventional cells and amorphous cells (cell free).

For a cell, the base station may implement a sectorized cell by means of beamforming. Illustratively, as shown in fig. 1, the base station divides the entire cell into 12 areas (B1, B2, B3, B4, B5, B6, B7, B8, B9, B10, B11, B12) by 4 horizontal beams (H1, H2, H3, H4) and 3 vertical beams (V1, V2, V3). The correspondence of the areas to the beams is as follows:

the area B1 corresponds to the horizontal beam H1 and the vertical beam V1, the area B2 corresponds to the horizontal beam H1 and the vertical beam V2, and so on. In addition, the above regions may be combined according to the need, which is not limited in the present disclosure.

For an amorphous cell, a plurality of base stations within a certain area range can cooperatively provide a communication mobile communication service for a terminal. The amorphous cells may also enable localized cell communication.

In addition, with the development of communication technology, the base station may also perform network communication through new spectrum resources, so as to improve throughput and network performance, such as 6.1GHz-7.1GHz spectrum and 7-24GHz spectrum. In conventional communication systems, since the separation distance between the transmit beam Tx and the terminal is typically greater than the rayleigh distance (RAYLEIGH LENGTH), the transmission of the base station in a channel implementation is typically modeled based on far field assumptions. However, the technologies of intelligent super-surface and the like greatly increase the size of a transmitting unit panel and the number of elements, and meanwhile, the deployment of multiple input multiple output (multiple input multiple output, MIMO) nodes is increased, so that the separation distance between a base station and a terminal is further reduced, and the near-field range is continuously enlarged. In this way, the base station can realize higher spatial multiplexing by focusing the beam in the near field range, thereby improving the cell capacity. The base station may also facilitate localized cell communication based on artificial intelligence (ARTIFICIAL INTELLIGENCE, AI) predictions and terminal camping information.

In summary, the cell regionalization is mainly used to meet different requirements of the terminal, such as distance, different channel conditions, capabilities of different UEs (e.g. common terminal, low capability terminal (redcap UE)), whether to support sub-band full duplex, whether to support repeated transmission, whether to support contention-based random access, etc.

Terminals within the coverage area of the base station currently adopt the same random access configuration to perform random access, for example, the same Physical Random Access Channel (PRACH) format (format), the same subcarrier spacing, the same power control parameters, and the like. In order to ensure that all terminals in a network can complete uplink access, the PRACH format is generally configured by taking the terminal with the worst communication as a standard in the current network, however, the communication quality of different terminals is often different, so that the random access configuration used when part of terminals are accessed randomly is not matched with the actual communication quality, in fact, the differential requirements of the terminals in the whole network are not well met, and the access effect of the terminals for executing random access is poor.

In view of this, in the technical solution provided in the present disclosure, the first node may receive a target synchronization signal block in at least one synchronization signal block, thereby obtaining random access configuration information associated with the target synchronization signal block, and then, the first node may perform random access based on the random access configuration information associated with the target synchronization signal block. The method and the device have the advantages that the at least one synchronous signal block is associated with the plurality of pieces of random access configuration information, so that the configuration of a plurality of sets of random access configuration information in a network is realized by establishing the association relation between the synchronous signal block and the random access configuration information, the terminals in the network can be subjected to random access through different pieces of random access configuration information, different communication requirements of the terminals are met, and the access effect of the terminals for executing random access is improved.

The network architecture of the mobile communication network (including but not limited to 3g,4g,5g and future mobile communication networks) in embodiments of the present disclosure may include at least a first communication node and a second communication node. It should be appreciated that in this example, the first communication node may be a network-side device (including, but not limited to, a base station, for example) and the second communication node may be a terminal-side device (including, but not limited to, a terminal, for example) in the downlink. Of course, in the uplink, the first communication node may be a terminal-side device, and the second communication node may be a network-side device. In the case where both communication nodes are device-to-device communications, both the first communication node and the second communication node may be base stations or terminals. The first communication node and the second communication node may be abbreviated as first node and second node, respectively.

By way of example, taking a first communication node as a terminal and a second communication node as a base station, as shown in fig. 4, a communication system according to an embodiment of the present disclosure is provided, where the communication system includes a terminal 401 and a base station 402. The terminal 401 and the base station 402 may be one or more, and are not limited in number.

The technical scheme of the embodiment of the disclosure can be applied to various communication systems, such as code division multiple access (code division multiple access, CDMA), time division multiple access (time division multiple access, TDMA), frequency division multiple access (frequency division multiple access, FDMA), orthogonal frequency division multiple access (orthogonal frequency-division multiple access, OFDMA), single carrier frequency division multiple access (SINGLE CARRIER FDMA, SC-FDMA), other systems and the like. The term "system" may be used interchangeably with "network". The CDMA system may implement wireless technologies such as universal wireless terrestrial access (universal terrestrial radio access, UTRA), CDMA2000, and the like. UTRA may include Wideband CDMA (WCDMA) technology and other CDMA variant technologies. CDMA2000 may cover the transition standards (INTERIM STANDARD, IS) 2000 (IS-2000), IS-95, and IS-856 standards. TDMA systems may implement wireless technologies such as the global system for mobile communications (global system for mobile communication, GSM). The OFDMA system may implement wireless technologies such as evolved universal wireless terrestrial access (E-UTRA), ultra mobile broadband (ultra mobile broadband, UMB), IEEE 802.11 (Wi-Fi), IEEE 802.16 (WiMAX), IEEE 802.20,Flash OFDMA, and the like. UTRA and E-UTRA are UMTS and UMTS evolution versions. Various versions of 3GPP in long term evolution (long term evolution, LTE) and LTE-based evolution are new versions of UMTS that use E-UTRA. The communication system can also be a 5G communication system, a New Radio (NR), and a 6G communication system. In addition, the communication system can be also suitable for future communication technology, and the technical scheme provided by the embodiment of the disclosure is applicable.

Terminal 401 is a device with wireless communication capabilities that may be deployed on land, including indoors or outdoors, hand held or vehicle mounted. Can also be deployed on the water surface (such as a ship, etc.). But may also be deployed in the air (e.g., on aircraft, balloon, satellite, etc.). The terminal 401, also called User Equipment (UE), mobile Station (MS), mobile Terminal (MT), terminal equipment, etc., is a device that provides voice and/or data connectivity to a user. For example, the terminal 401 includes a handheld device, an in-vehicle device, or the like having a wireless connection function. Currently, the terminal 401 may be a mobile phone, a tablet, a notebook, a palm, a mobile internet device (mobile INTERNET DEVICE, MID), a wearable device (e.g., a smart watch, a smart bracelet, a pedometer, etc.), a vehicle-mounted device (e.g., an automobile, a bicycle, an electric car, an airplane, a ship, a train, a high-speed rail, etc.), a Virtual Reality (VR) device, an augmented reality (augmented reality, AR) device, a wireless terminal in an industrial control (industrial control), a smart home device (e.g., a refrigerator, a television, an air conditioner, an electric meter, etc.), a smart robot, a workshop device, a wireless terminal in an unmanned (SELF DRIVING), a wireless terminal in a teleoperation (remote medical surgery), a wireless terminal in a smart grid (SMART GRID), a wireless terminal in a transportation security (transportation safety), a wireless terminal in a smart city (SMART CITY), or a wireless terminal in a smart home (smart home) balloon, a device (e.g., a smart flying robot, a hot man, an airplane, etc.). The terminal in the scene of one possible application of the present disclosure is a terminal that often works on the ground, such as a vehicle-mounted device. In the present disclosure, for convenience of description, chips disposed in the above devices, such as a System-On-a-Chip (SOC), a baseband Chip, etc., or other chips having a communication function may also be referred to as terminals.

The terminal 401 may be a vehicle with a corresponding communication function, or a vehicle-mounted communication device, or other embedded communication devices, or may be a user handheld communication device, including a mobile phone, a tablet computer, and the like.

As an example, in the disclosed embodiment, the terminal 401 may also be a wearable device. The wearable device can also be called as a wearable intelligent device, and is a generic name for intelligently designing daily wear by applying wearable technology and developing wearable devices, such as glasses, gloves, watches, clothes, shoes and the like. The wearable device is a portable device that is worn directly on the body or integrated into the clothing or accessories of the user. The wearable device is not only a hardware device, but also can realize a powerful function through software support, data interaction and cloud interaction. The generalized wearable intelligent device comprises full functions, large size and complete or partial functions which can be realized independently of a smart phone, such as a smart watch, a smart glasses and the like, and is only focused on certain application functions, and needs to be matched with other devices such as the smart phone for use, such as various smart bracelets, smart jewelry and the like for physical sign monitoring.

The base station 402 is a device having a wireless transceiver function and located on the access network side of the communication system, or a chip system that can be disposed on the device. The base station 402 includes, but is not limited to, an Access Point (AP) in a WiFi system, such as a home gateway, a router, a server, a switch, a bridge, etc., an evolved NodeB (eNB), a radio network controller (radio network controller, RNC), a NodeB (NodeB, NB), a base station controller (base station controller, BSC), a base transceiver station (base transceiver station, BTS), a home base station (e.g., home evolved NodeB, or home NodeB, HNB), a Base Band Unit (BBU), a wireless relay node, a wireless backhaul node, a transmission point (transmission and reception point, TRP, transmission point, TP), etc., a 5G base station, such as a gbb in a new air interface (NR) system, or a transmission point (TRP, TP), one or a group of base stations (including a plurality of antenna panels) in a 5G system, or a network node constituting a gbb or transmission point, such as a Base Band Unit (BBU), or a distributed base band unit (base station unit), a base band unit (RSU), a distributed unit (base station unit), a service unit (RSU), a service unit (4-side, a service unit, or the like. The base station 402 further includes base stations in different networking modes, such as a master enhanced NodeB (MeNB), a secondary eNB (secondary eNB), a SeNB, or a secondary gNB, a SgNB). Base station 402 also includes different types such as terrestrial base stations, aerial base stations, satellite base stations, and the like.

The base station 402 is configured to transmit a target synchronization signal block of the at least one synchronization signal block.

Wherein at least one synchronization signal block is associated with a plurality of random access configuration information.

It should be noted that, the at least one synchronization signal block may be an SSB defined in the current communication system, or may be a signal for device communication synchronization in a future communication system, or may be an SSB shared by multiple communication systems (e.g. 5G/6G common), or may include an SSB defined by each communication system, or may include an SSB shared by multiple communication systems.

In some embodiments, the random access configuration information includes at least one of a Physical Random Access (PRACH) configuration index, a Physical Random Access (PRACH) configuration period, a preamble sequence (preamble) format, a message 1 (Msg 1) time domain information, a number of frequency-division random access opportunities (RACH occision, RO) for message 1 (Msg 1), a message 1 (Msg 1) frequency domain start position, a preamble target received power, a Physical Random Access (PRACH) power boost step size, a maximum number of random access preamble transmissions, a time window length of a random access response (random access response, RAR), a message 1 (Msg 1) subcarrier spacing, a message 3 (Msg 3) transmission precoding enable identification, a preamble sequence (in GroupA) for contention random access, a Physical Random Access (PRACH) root sequence index, a contention resolution timer initial value, a message 3 (Msg 3) transmission block large threshold, a Synchronization Signal Block (SSB) selection reference signal received power (35 RP) block, a signal received power (SSB) selection reference signal received power (35, a signal block (SSB) repetition threshold, a signal (RSRP) repetition threshold (RSB) and a number of signal (RSB) repetition threshold (RSRP) of a message 1) repetition threshold, a number of signal (RSRP) repetition threshold(s) of a message 1, a repetition rate (RSRP) repetition rate(s) and a number of signal (RSSs) of repetition rate(s) of the repetition rate(s) that is determined by the repetition rate(s) and a repetition rate(s) of the signal (RSs) and the repetition rate (time, sub-band full duplex (subband full duplex, SBFD) configuration, full duplex configuration (full duplex), random access opportunity, increased random access opportunity (additional RO).

Wherein, message 1 is a message carrying a preamble sequence in the random access process, and message 3 is a message for requesting connection establishment in the random access process. In some embodiments, the transmission of message 3 is quasi co-located (quasi co location, QCL) with message 1.

It should be noted that, the base station 402 typically covers the entire cell by means of beam scanning. For example, as shown in fig. 2, each synchronization signal block corresponds to one beam direction, and the base station may transmit one or more beam directions at a time, so that the base station may transmit the beam directions required to cover the entire cell at a plurality of times. A set of synchronization signal blocks (synchronization signal/PBCH block set, also called SS burst set) is used to characterize the set of synchronization signal blocks transmitted in the beam direction at multiple times in the beam scan. For example, the maximum number of SSBs transmitted by a cell in the NR may be 4, 8 or 64.

The terminal 401 is configured to receive a target synchronization signal block of the at least one synchronization signal block.

For example, before performing random access, the terminal 401 may search for and acquire an optimal transmit beam of the base station 402 and an optimal receive beam pair of the terminal 401, and by measuring a beam of the SSB or the channel state information reference signal (CHANNEL STATE information-REFERENCE SIGNAL, CSI-RS), the terminal 401 may determine that the reception quality satisfies the SSB or the CSI-RS of the reception threshold.

The terminal 401 is further configured to acquire random access configuration information associated with the target synchronization signal block, and perform random access based on the random access configuration information associated with the target synchronization signal block.

In combination with the above example, the terminal 401 may select a random access resource subset or a random access preamble index subset to send Msg1 according to the association relationship between the synchronization signal block and the random access configuration information and the above determined SSB or CSI-RS, so as to initiate a random access procedure. Accordingly, the base station 402 detects the Msg1 for random access. In the case where the terminal 401 and the base station 402 have no beam diversity, since the transmission beam of the base station 402 and the reception beam of the terminal 401 determined in the downlink cannot be directly used for the reception beam of the base station 402 and the transmission beam of the terminal 401, the base station 402 and the terminal 401 also need to perform uplink beam scanning to acquire the reception beam of the base station 402 and the transmission beam of the terminal 401.

In some embodiments, the synchronization signal block has an association with the random access opportunity. The random access opportunities corresponding to different synchronization signal blocks may be the same or different. That is, the synchronization signal blocks and random access opportunities may be uniformly mapped or non-uniformly mapped.

Taking the uniform mapping of the synchronization signal block and the random access opportunity as an example, as shown in fig. 3, the terminal can obtain configuration parameters ssb-perRACH-Occasion and CB-PreamblesPerSSB through higher layer parameters ssb-perRACH-OccasionAndCB-PreamblesPerSSB.

The first configuration parameter SSB-perRACH-Occasion represents the number of SSBs associated with one RO. For example, in FIG. 3 SSB includes SSB1, SSB2, SSB3 and SSB4, respectively, with RACH frequency domain resources of 4 and SSB-perRACH-Occasion values ofWhen 1 SSB associates 4 ROs. SSB1 corresponds to 4 ROs at time domain position 1, SSB2 corresponds to 4 ROs at time domain position 2, SSB3 corresponds to 4 ROs at time domain position 3, and SSB4 corresponds to 4 ROs at time domain position 4. When the RACH frequency domain resource is 4 and the value of SSB-perRACH-Occasion is 1, SSB2, SSB3 and SSB4 respectively correspond to 1 RO at each time domain position. When the RACH frequency domain resource is 2 and the value of SSB-perRACH-Occasion is 2, the SSB1 and the SSB2 correspond to the same RO, and the SSB3 and the SSB4 correspond to the same RO.

The second parameter, CB-PreamblesPerSSB, is used to characterize the number of contention-based preambles corresponding to each SSB. Taking SSB-perRACH-Occasion as an example, the value of N, CB-PreamblesPerSSB is R, in the case of N <1, 1 SSB is associatedEach SSB has an associated random access preamble sequence range of 0, r for each successive RO. Under the condition that N is more than or equal to 1, N SSBs are associated with 1 RO, and the range of the random access preamble sequence associated with each SSB on the RO isWherein r is an integer greater than or equal to 0 and less than or equal to N-1, corresponding to N SSB respectively,Can be obtained by the high-level parameters totalNumberOfRA-Preambles, and the value of the parameters is an integer multiple of N.

Further, the terminal 401 may perform uplink random access through a 4-step RACH or a 2-step RACH. The 4-step RACH includes an interaction procedure between the terminal 401 and the base station 402 twice, including 2 messages (Msg 1, msg 3) reported by the terminal 401 and 2 messages (Msg 2, msg 4) responded by the base station 402. Two uplink channel messages Msg1 and Msg3 in the 4-step RACH are combined into MsgA in the 2-step RACH, two uplink channel messages Msg2 and Msg4 in the 4-step RACH are combined into MsgB in the 2-step RACH, and the whole RACH process is completed through 2-step interaction, so that time delay, signaling overhead and power consumption in the random access process are reduced. Since the base station 402 in the 4-step RACH may report the Physical Uplink SHARED CHANNEL (PUSCH) resource of the control information required for access through the Msg2 scheduling terminal 401, and the terminal 401 in the 2-step RACH does not acquire the scheduling information of the base station 402 before reporting MsgA, the transmission of MsgA is based on the reporting of a contention-based message, for example, MSGA PRACH of the bearer preamble sequence and MsgA PUSCH of the bearer control information included therein. MsgA PUSCH can be demodulated in a variety of ways. For example, different preamble sequences are mapped to different PUSCH resources, so as to ensure that PUSCH transmissions reporting the different preamble sequences are orthogonal, thereby avoiding interference. Also, for example, by a non-orthogonal multiple access (non-orthogonal multiplex access, NOMA) technique, a low code rate processing operation is performed at the transmitting end, and an iterative interference cancellation technique is used to implement non-orthogonal multiplexing at the receiving end.

It should be noted that the terminal 401 may configure only the 4-step RACH, or only the 2-step RACH, or may configure both the 4-step RACH and the 2-step RACH, for example, the terminal 401 may select whether to perform random access through the 4-step RACH or the 2-step RACH according to the RSRP threshold.

It should be noted that, the embodiments of the present disclosure may refer to or refer to each other, for example, the same or similar steps, and the method embodiment, the system embodiment and the apparatus embodiment may refer to each other, which is not limited.

Fig. 5 is a flowchart of a random access method according to an embodiment of the present disclosure. As shown in fig. 5, the method comprises the steps of:

Step 501, a target synchronization signal block in at least one synchronization signal block is received.

Wherein at least one synchronization signal block is associated with a plurality of random access configuration information. That is, a set of synchronization signal blocks is associated with a set of random access configuration information.

In some embodiments, at least one synchronization signal block is associated with a plurality of random access configuration information, including at least one of:

one of the at least one synchronization signal block is associated with one of the plurality of random access configuration information. That is, the synchronization signal block and the random access configuration information may have a one-to-one association relationship.

One of the at least one synchronization signal block is associated with k of the plurality of random access configuration information. That is, the association between the synchronization signal block and the random access configuration information may be one-to-many. k is a positive integer greater than or equal to 2.

N of the at least one synchronization signal block are associated with one of the plurality of random access configuration information. That is, the association between the synchronization signal block and the random access configuration information may be many-to-one. n is a positive integer greater than or equal to 2.

N of the at least one synchronization signal block are associated with k of the plurality of random access configuration information. That is, the synchronization signal block and the random access configuration information may also be a many-to-many association relationship.

The random access configuration information is information used by the first node for random access. The random access configuration information includes at least one of a physical random access configuration index, a physical random access configuration period, a preamble sequence format, message 1 time domain information, a number of frequency division random access opportunities for message 1, a message 1 frequency domain starting position, a preamble target received power, a physical random access power boost step size, a number of random access preamble maximum transmissions, a time window length of random access response, a message 1 subcarrier spacing, a message 3 transmission precoding enable identification, a number of preamble sequences for contention random access, a physical random access root sequence index, a contention resolution timer initial value, a message 3 transport block size threshold, a synchronization signal block selection reference signal received power threshold, an extended uplink synchronization signal block selection reference signal received power threshold, a user random access preamble sequence total number, a synchronization signal block and random access opportunity association relationship, a number of contention-based preamble sequences for each synchronization signal block correspondence, a restriction set configuration, a message 1 repeated transmission identification, a message 1 repeated transmission number, a subband full duplex configuration, a full duplex configuration, random access, and an increased random access opportunity.

Wherein, message 1 is a message carrying a preamble sequence in the random access process, and message 3 is a message for requesting connection establishment in the random access process.

In some embodiments, the transmission of message 3 is quasi co-located (quasi co location, QCL) with message 1.

The random access configuration information can be distinguished by different values of parameters, for example, the random access configuration information can be different preamble sequence formats in the random access configuration information, for example, one random access configuration information can be preamble sequence format A3, the other random access configuration information can be preamble sequence format B4, the further preamble sequence format can be newly defined by 6G, the random access configuration information can also be different in the starting position of the message 1 frequency domain, for example, in different frequency domains RO, the random access configuration information can also be different in the message 1 time domain, for example, in different time domains RO, the random access configuration information can also be different in the correlation relationship between the synchronizing signal blocks and the random access opportunity and the number of preamble sequences corresponding to each synchronizing signal block, the random access configuration information can also be different in the physical random access configuration index, for example, the line index of the indication table 1 can be different, the physical random access configuration index is 1, the physical random access configuration index is another physical random access configuration index is 160, the random access configuration information can also be the random access configuration 1, the random access configuration can be repeated to have multiple power, for example, the random access configuration is repeated to increase the power, the number of the random access configuration is different, the random access configuration is 1, the target is repeated, the random access is repeated, the number of the random access configuration is different, the target is repeated, the random access is can be transmitted, the target 1 is repeated, the random access is repeated, the message is transmitted, the message is the random access is repeatedly has a message has different power, and the transmission has different power, and the target power has different power, and the transmission has a target for its has a different power, and the transmission time, and the transmission has a target, and a transmission has a device, and a, the other random access configuration information indicates that the random access configuration information is enabled and the number of repeated transmission times of the message 1 is 8, and the random access configuration information can also be different in message 3 configuration information, for example, the size threshold of the transmission block of the message 3 is different. In addition, the random access configuration information can also be distinguished by the difference of parameter combinations.

Taking the example that the random access configuration information includes a physical random access configuration index, the present disclosure can configure the corresponding relation between the physical random access configuration index and parameters such as a preamble sequence format, time domain information, etc. through a physical random access configuration table. The physical random access configuration table is shown in table 1 below, by way of example:

table 1 physical random access configuration table

Where n _SFN modx = y is used to define the system frame that transmits the preamble sequence, e.g. when the PRACH configuration index is 0, the system frame that transmits the preamble sequence is the 1 st frame of every 16 frames, i.e. 1, 17, 33, etc. The subframe number (subframe number) refers to a subframe in the system frame for transmitting the preamble sequence, and the start symbol (symbol) is used to indicate the start symbol position in the subframe for transmitting the preamble sequence, and the number of PRACH slots in the subframe refers to the number of PRACH slots in the subframe for transmitting the preamble sequence.Refers to the number of time domain locations in each PRACH slot,Indicating the PRACH duration occupied by the preamble sequence. The physical random access configuration index in the present disclosure can indicate, on a signaling structure, a plurality of rows of information in a physical random access configuration table, for example, a high-layer parameter PRACH configuration index set (PRACH configuration index group), for configuring a plurality of physical random access configuration indexes. Illustratively, the PRACH configuration index set {160,199} indicates that the configuration information is the configuration information of the 161 st row and the 200 st row in the physical random access configuration table, and the preamble sequence B4 and the preamble sequence C2, and the corresponding time domain resource information are respectively configured.

Step 502, acquiring random access configuration information associated with a target synchronization signal block.

Wherein the random access configuration information may be indicated by a system information block (e.g., SIB 1). That is, the synchronization signal block may be associated with a system information block including random access configuration information associated with the synchronization signal block.

In a possible implementation manner, the first node determines a system information block associated with the target synchronization signal block, and obtains random access configuration information associated with the target synchronization signal block from the system information block.

Illustratively, after receiving the target synchronization signal block, the first node may acquire a MIB message through a PBCH in the target synchronization signal block, where the MIB message is used to indicate a control resource set and a search space (i.e., CORESET 0) of a system information block (SIB 1) associated with the detection target synchronization signal block, and then the first node blindly detects DCI of a physical downlink control channel (physical downlink control channel, PDCCH) through CORESET0, where the DCI is used to indicate SIB1 in a PDSCH. After the first node acquires the indicated SIB1 through DCI, the random access configuration information associated with the target synchronization signal block may be acquired from the SIB1.

Wherein, different SSBs may correspond to different SIB1 (e.g., SIB1-1, SIB1-2, etc.), and further correspond to different random access configuration information. The synchronization signal block and the system information block may have a one-to-one correspondence, a many-to-one correspondence, a one-to-many correspondence, or a combination of one-to-one, many-to-one, and one-to-many.

Illustratively, as shown in FIG. 6, one synchronization signal block may correspond to one system information block, e.g., SSB1 for SIB1-1, SSB2 for SIB1-2, etc. As shown in fig. 7, the plurality of synchronization signal blocks may correspond to one system information block, for example, SSB1 corresponds to SIB1-1, SSB2 corresponds to SIB1-1, SSB3 corresponds to SIB1-2, and so on.

In some embodiments, for the case that multiple synchronization signal blocks are for one system information block, other synchronization signal blocks (e.g., SSB2 in fig. 7) than the first synchronization signal block (e.g., SSB1 in fig. 7) may be implemented by on-demand (on-demand) transmission, and the corresponding system information block (e.g., SIB1-1 in fig. 7) may also be implemented by on-demand (on-demand) transmission, i.e., the second node triggers transmission of SSB2 or SIB1-1 in response to a wake-up signal (WUS) of the first node.

In some embodiments, the SSB may be a 5G/6G system shared SSB or comprise part of a 5G/6G system shared SSB.

In summary, the present disclosure may indicate different random access configuration information through a synchronization signal block, for example, the preamble sequence format B1 is suitable for a node with better communication quality, the preamble sequence format B4 is suitable for a node with worse communication quality, and in the present disclosure, the second node may indicate, through the synchronization signal block, the center node to perform random access through the preamble sequence format B1, thereby improving access speed, and instruct the edge node to perform random access through the preamble sequence format B4, so as to ensure access success rate.

Step 503, performing random access based on the random access configuration information associated with the target synchronization signal block.

It should be noted that the above technical solution may be applied to a normal carrier, a supplementary uplink (supplementary uplink, SUL), or an uplink-only carrier.

In the technical scheme provided by the disclosure, the first node may receive the target synchronization signal block in the at least one synchronization signal block, thereby obtaining random access configuration information associated with the target synchronization signal block, and then, the first node may perform random access based on the random access configuration information associated with the target synchronization signal block. The method and the device have the advantages that the at least one synchronous signal block is associated with the plurality of pieces of random access configuration information, so that the configuration of a plurality of sets of random access configuration information in a network is realized by establishing the association relation between the synchronous signal block and the random access configuration information, a first node in the network can perform random access through different pieces of random access configuration information, different communication requirements of the first node are met, and the access effect of the first node for executing random access is improved.

Note that, the number of random access configuration information associated with the target synchronization signal block may be 1 or m. m is a positive integer greater than or equal to 2. For the case that the number of the random access configuration information is 1, the first node may perform random access directly based on the random access configuration information. For the case that the random access configuration information is m, the first node may further select 1 random access configuration information from the m random access configuration information for random access.

As one possible embodiment of the present disclosure, in connection with the embodiment shown in fig. 5, as shown in fig. 8, the target synchronization signal block is associated with m pieces of random access configuration information among the plurality of random access configuration information, where m is a positive integer greater than or equal to 2, and the above-mentioned step 503 may be implemented by the following steps 801 to 802.

Step 801, selecting first random access configuration information from m pieces of random access configuration information.

For example, different random access configuration information may be applied to first nodes with different communication qualities, and the first node may select the first random access configuration information from the m random access configuration information according to the communication quality.

In a possible implementation manner, the first node uses random access configuration information corresponding to a measurement quality interval in which the current communication measurement quality is located as the first random access configuration information.

The m pieces of random access configuration information respectively correspond to a plurality of measurement quality intervals.

Illustratively, the communication quality of the node may be represented by RSRP, the communication measurement quality may be a measurement value of RSRP by the first node, and the measurement quality interval may be divided by an RSRP threshold value. The first node selects random access configuration information corresponding to a measurement quality interval as first random access configuration information by determining an RSRP measurement value of a Downlink (DL) signal (SSB or CSI-RS).

As shown in fig. 9, the threshold a divides the communication measurement quality into two sections, and the random access configuration information 1 corresponds to a section where the communication measurement quality is greater than or equal to the threshold a, and the random access configuration information 2 corresponds to a section where the communication measurement quality is less than the threshold a. In case that the current communication measurement quality is greater than or equal to the threshold a, the first node uses the random access configuration information 1 as the first random access configuration information. In case the current communication measurement quality is smaller than the threshold a, the first node takes the random access configuration information 2 as the first random access configuration information. For example, the random access configuration information 1 is configured with the preamble sequence format A3 in the short format, and the random access configuration information 2 is configured with the preamble sequence format B4 in the short format, so that the first node may select the preamble sequence format A3 for random access when the channel condition is good, and may select the preamble sequence format B4 for random access when the channel condition is bad.

The random access configuration information may be configuration information of a 4-step RACH or configuration information of a 2-step RACH, and the present disclosure may divide the communication measurement quality into a plurality of intervals through a plurality of threshold values.

As shown in fig. 10, the present disclosure may divide the communication measurement quality into 3 intervals by a threshold 1 and a threshold 2, where the threshold 1 is greater than the threshold 2. Under the condition that the current communication measurement quality is greater than or equal to the threshold 1, the current channel condition is better represented, and the first node can take the random access configuration information 3 as first random access configuration information. The random access configuration information 3 is used to instruct the first node to perform 2-step RACH through preamble sequence format A2 to increase access speed. And under the condition that the current communication measurement quality is smaller than the threshold 1 and larger than or equal to the threshold 2, the current channel condition is represented to be medium, and the first node can take the random access configuration information 4 as first random access configuration information. The random access configuration information 4 is used to instruct the first node to perform 2-step RACH through preamble sequence format B4. And under the condition that the current communication measurement quality is smaller than the threshold 2, the current channel condition is poor, and the first node can take the random access configuration information 5 as first random access configuration information. The random access configuration information 5 is used for indicating the first node to perform 4 steps of RACH through the preamble sequence format B4 so as to ensure the access success rate.

As shown in fig. 11, the present disclosure may divide the communication measurement quality into 4 intervals through a threshold 1, a threshold 2 and a threshold 3, where the threshold 1 is greater than the threshold 2 and greater than the threshold 3, and the first node may use the random access configuration information 6 as the first random access configuration information when the current communication measurement quality is greater than or equal to the threshold 1 and the current channel condition is better. The random access configuration information 6 is used to instruct the first node to perform 2-step RACH through the preamble sequence format A2 to increase the access speed. And under the condition that the current communication measurement quality is smaller than the threshold 1 and larger than or equal to the threshold 2, the current channel condition is represented, and the first node can take the random access configuration information 7 as first random access configuration information. The random access configuration information 7 is used to instruct the first node to perform 4-step RACH via preamble sequence format A2. In case the current communication measurement quality is smaller than the threshold 2 and larger than or equal to the threshold 3, the first node may take the random access configuration information 8 as the first random access configuration information. The random access configuration information 8 is used to instruct the first node to perform 2-step RACH via preamble sequence format B4. In case the current communication measurement quality is smaller than the threshold 3, the first node may take the random access configuration information 9 as the first random access configuration information. The random access configuration information 9 is used to instruct the first node to perform 4-step RACH via preamble sequence format B4.

It should be noted that, in the present disclosure, the measurement quality interval may correspond to one or more pieces of random access configuration information. As shown in fig. 12, the present disclosure may divide the communication measurement quality into 3 intervals by a threshold 1 and a threshold 2, where the random access configuration information 10 corresponds to an interval greater than or equal to the threshold 1, the random access configuration information 11 and the random access configuration information 12 correspond to an interval less than the threshold 1 and greater than or equal to the threshold 1, the random access configuration information 13 corresponds to an interval less than the threshold 2, the random access configuration information 10 is used to instruct the first node to perform 2-step RACH by the preamble sequence format A2, the random access configuration information 11 is used to instruct the first node to perform 4-step RACH by the preamble sequence format A2, the random access configuration information 12 is used to instruct the first node to perform 2-step RACH by the preamble sequence format B4, and the random access configuration information 13 is used to instruct the first node to perform 4-step RACH by the preamble sequence format B4. For the case that the measurement quality interval corresponds to the plurality of random access configuration information, the first node may further select one random access configuration information from the plurality of random access configuration information corresponding to the measurement quality interval as the first random access configuration information. For example, the first node may be configured with a priority of information, a random access manner supported by the device, and so on.

Step 802, performing random access based on the first random access configuration information.

In the technical scheme provided by the disclosure, under the condition that the target synchronization information block is associated with a plurality of pieces of random access configuration information, the first node can select appropriate random access configuration information from the pieces of random access configuration information to perform random access, for example, select corresponding random access configuration information based on communication quality, so that the first node can further select the random access configuration information which is more matched with the first node, and the random access effect is improved.

In addition, in the case that the first node fails to perform random access, the first node may also change the random access configuration information to perform message retransmission. As one possible embodiment of the present disclosure, in combination with the embodiment shown in fig. 5, as shown in fig. 8, the method further includes the following steps 803-804.

Step 803, selecting second random access configuration information from m random access configuration information in case of random access failure based on the first random access configuration information.

The second random access configuration information may be random access configuration information other than the first random access configuration information in the m random access configuration information, that is, the first random access configuration information is different from the second random access configuration information.

Taking the 4-step RACH as an example, after the first node sends the Msg1 message through the first random access configuration information, the first node starts an Msg2 message waiting window, and receives the Msg2 responded by the second node through the Msg2 message waiting window. If the first node does not receive the Msg2 message in the Msg2 message waiting window, it indicates that the first node fails to perform random access based on the first random access configuration information, and therefore, the first node may perform random access again by means of retransmission (retransmission).

The first node may increase the transmission power and switch the transmission beam during retransmission, thereby increasing the retransmission power, and in addition, the first node may switch the random access configuration information, i.e. select the second random access configuration information from the m random access configuration information.

Step 804, performing random access based on the second random access configuration information.

For example, the m pieces of random access configuration information include random access configuration information 1 and random access configuration information 2. Wherein, the random access configuration information 1 is used to indicate a preamble sequence format B4, and the preamble sequence format B4 occupies a length of approximately 12 symbols. The random access configuration information 2 is used to indicate a preamble sequence format C2, and the preamble sequence format C2 occupies a length of approximately 5 symbols. Illustratively, the first node may transmit using preamble format C2 at the time of initial transmission, and may fall back to B4 for random access at the time of retransmission.

It should be noted that, when the first node switches the random access configuration information to perform random access, the transmit power may be kept unchanged, or the transmit beam may be kept unchanged. The first node may also switch the transmit beam when switching the random access configuration information, e.g. in case different random access configuration information is associated with different synchronization signal blocks. In addition, the first node may increase the transmit power for retransmission when switching the random access configuration information.

In the above technical solution, the first node may select other random access configuration information from the m random access configuration information under the condition that the random access based on the first random access configuration information fails, thereby improving the success rate of the random access.

Further, in case the first node is configured with a plurality of kinds of random access configuration information, one kind of random access configuration information among the plurality of kinds of random access configuration information may be a default (default) configuration for retransmission. For example, the first random access configuration information is a default configuration, and the first node may retransmit the first random access configuration information.

In addition, the above method may be applied to a normal carrier, a supplementary uplink (supplementary uplink, SUL), or an uplink-only carrier.

In addition, the random access opportunity is a transmission resource of the first node transmitting the preamble sequence in the random access process, more random access opportunities can be allocated to the first node with poor communication quality in the method, so that the success rate of random access is improved, fewer random access opportunities are allocated to the first node with good communication quality, and the resource utilization rate is improved.

In some embodiments, the synchronization signal block has an association with the random access opportunity. The number of random access opportunities associated with different synchronization signal blocks may be the same or different.

It should be noted that different synchronization signal blocks in the present disclosure may be associated with different random access configuration information, and thus, the present disclosure may further configure an association relationship between the synchronization signal blocks and the random access opportunity.

For example, the synchronization signal blocks and the random access opportunities may be non-uniform association mapping, i.e. different synchronization signal blocks may correspond to different random access opportunities, as shown in fig. 13, where the synchronization signal blocks include SSB1, SSB2, and SSB3, and the random access opportunities include RO1, RO2, RO3, and RO4.SSB1 is associated with RO1, RO2, RO3, and RO4, SSB2 is associated with RO1, RO3, and SSB3 is associated with RO4.

In addition, the mapping order of the synchronization signal blocks and the random access opportunities can be ascending order or descending order, and the association modes of different synchronization signal blocks and the random access opportunities can be different. As shown in fig. 14, the synchronization signal block includes SSB1, SSB2, SSB3, and SSB4, in the first association manner, RACH frequency domain resource is 4, SSB1 associates 4 ROs at time domain position 1, SSB2 associates 2 ROs at time domain position 2, SSB3, and SSB4 respectively associate 1 RO at time domain position 2. In the second association, RACH frequency domain resource is 4, SSB1 associates 1 RO at time domain position 2, SSB2 associates 2 ROs at time domain position 2, SSB3 associates 1 RO at time domain position 2, SSB4 associates 4 ROs at time domain position 1. In a third association, RACH frequency domain resource is 2, SSB1 associates 1 RO at time domain position 1, SSB2 associates 1 RO at time domain position 1, SSB3 and SSB4 simultaneously associate 2 ROs at time domain position 2.

In some embodiments, the synchronization signal block may also be associated with a random access opportunity through random access configuration information. The ROs associated with the subset of SSBs are configured, for example, by random access configuration information. Illustratively, as shown in fig. 15, the first set of random access configuration information corresponds to SSB1 and SSB2, that is, SSB1 and SSB2 are used as a subset for the association mapping of the first set of random access configuration information, where SSB1 may associate RO1 and RO2 in time slot n indicated by the first set of random access configuration information, and SSB2 may associate RO3 and RO4 in time slot n+1 indicated by the first set of random access configuration information. The second set of random access configuration information corresponds to SSB3 and SSB4, i.e. SSB3 and SSB4 are used as a subset for the association mapping of the second set of random access configuration information, wherein SSB3 may associate RO1 and RO2 in slot n indicated by the second set of random access configuration information with RO1 and RO2 in slot n+1, and SSB4 may associate RO3 in slot n indicated by the second set of random access configuration information with RO3 in slot n+1. In this way, the association between the SSB and the RO may be achieved by configuring the available RACH resources in the random access configuration information without directly associating the SSB with the RO.

In summary, the case of the association mapping of the synchronization signal block and the random access opportunity includes at least one of the following:

a portion of the synchronization signal block is associated with all random access opportunities;

a portion of the synchronization signal block is associated with a portion of the random access opportunity;

the association modes of different synchronous signal blocks and random access opportunities are different;

The synchronization signal block is not directly associated with the random access opportunity and is configured through the available RACH resources configured by the random access configuration information.

In some embodiments, multiple synchronization signal blocks may be associated with the same random access opportunity, the multiple synchronization signal blocks being disjoint from the range of random access preamble sequences associated on the random access opportunity.

It should be noted that, when multiple synchronization signal blocks may be associated with the same random access opportunity, different first nodes may send the same preamble sequence based on the same random access opportunity during random access, which may cause the second node to fail to accurately identify the first node, thereby causing random access failure. Thus, multiple synchronization signal blocks associated with the same random access opportunity in the present disclosure may associate different ranges of preamble sequences on the random access opportunity to ensure that the first node uses different preamble sequences when reporting through ROs associated with different SSBs.

For example, the random access preamble sequence range in the random access configuration information associated with the plurality of synchronization signal blocks may be an equally divided packet or an unevenly divided packet. That is, the number of sequences in the preamble sequence range allocated by the plurality of synchronization signal blocks may be the same or different. For example, SSB1 and SSB2 are associated with the same RO, the range of the random access preamble sequence corresponding to SSB1 is 0-9, and the range of the random access preamble sequence corresponding to SSB2 is 10-30.

In some embodiments, the range of random access preamble sequences in the random access configuration information associated with the plurality of synchronization signal blocks is determined by the number of the plurality of synchronization signal blocks.

Illustratively, SSB1 is associated with RO1, SSB2 is associated with RO2 and RO3, SSB3 and SSB4 are associated with RO4 together, the range of random access preambles of SSB1 on RO1 may be all preambles, the range of random access preambles of SSB2 on RO2 and RO3 may be all preambles, and the range of random access preambles of SSB3 and SSB4 on RO4 may be half of preambles, respectively.

In some embodiments, random access configuration information is used to indicate a valid random access opportunity. In the case that the transmission resources overlap exists in the plurality of random access opportunities indicated by the different random access configuration information, the random access opportunity with the highest priority in the plurality of random access opportunities is a valid random access opportunity.

And under the condition that the transmission resource overlapping does not exist among the random access opportunities indicated by the different random access configuration information, the random access opportunities are valid random access opportunities.

As shown in fig. 15, the preamble sequence format configured by the first set of random access configuration information may be B4, which occupies approximately 12 symbols in length. The preamble sequence format of the second set of random access configuration information may be B1 or A1, occupying approximately 2 symbols in length. Here, the RO1 and the RO2 corresponding to the first set of random access configuration information overlap transmission resources (the time-frequency domain resources are illustrated in fig. 15) with the RO1 and the RO2 corresponding to the second set of random access configuration information, and the transmission resources coexist with the RO3 in the time-frequency domain, that is, do not overlap.

For example, UE1 performs random access through a first set of random access configuration information configuration, UE2 performs random access through a second set of random access configuration information configuration, and if UE2 uses RO1 or RO2 corresponding to the second set of random access configuration information, signal interference occurs with UE1, so in the present disclosure, the validity of the random access opportunity may be set by predefining or configuring the priority of the random access opportunity in different random access configuration information. For example, the priority of the random access opportunity corresponding to the first set of random access configuration information is higher than the priority of the random access opportunity corresponding to the second set of random access configuration information, where RO1 and RO2 in the first set of random access configuration information are valid ROs, RO1 and RO2 in the second set of random access configuration information are invalid ROs, and RO3 is valid RO. SSB3 and/or SSB4 may be mapped on RO3 to avoid signal interference between different nodes.

In some embodiments, when one synchronization signal block corresponds to a plurality of random access configuration information, random access opportunities corresponding to the plurality of random access configuration information respectively may be mapped in association with a set of random access opportunities.

Illustratively, as shown in fig. 16, one synchronization signal block corresponds to the first set of random access configuration information and the second set of random access configuration information in fig. 15. RO1 and RO2 on the time slot n corresponding to the first set of random access configuration information can be RO1 and RO2 after being associated and mapped, RO3 on the time slot n corresponding to the second set of random access configuration information can be RO3 after being associated and mapped, RO1 and RO2 on the time slot n+1 corresponding to the first set of random access configuration information can be RO4 and RO5 after being associated and mapped, and so on.

Fig. 17 is a flowchart of a random access method according to an embodiment of the present disclosure. As shown in fig. 17, the method includes the steps of:

step 1701, a target synchronization signal block of the at least one synchronization signal block is transmitted.

One of the at least one synchronization signal block is associated with one of the plurality of random access configuration information;

One of the at least one synchronization signal block is associated with k of the plurality of random access configuration information;

N synchronization signal blocks of the at least one synchronization signal block are associated with one random access configuration information of the plurality of random access configuration information;

N of the at least one synchronization signal block are associated with k of the plurality of random access configuration information.

Wherein n and k are positive integers greater than or equal to 2.

In some embodiments, the synchronization signal block is associated with a system information block that includes random access configuration information associated with the synchronization signal block.

In some embodiments, the synchronization signal block has an association with the random access opportunity.

In some embodiments, the number of random access opportunities associated with different synchronization signal blocks is the same or different.

In some embodiments, multiple synchronization signal blocks are associated with the same random access opportunity, and the random access preamble sequence ranges associated by the multiple synchronization signal blocks on the random access opportunity are disjoint.

In some embodiments, the random access configuration information is used for indicating effective random access opportunities, and in the case that the transmission resources of the random access opportunities indicated by different random access configuration information overlap, the random access opportunity with the highest priority in the random access opportunities is the effective random access opportunity.

In some embodiments, in the case where there is no transmission resource overlap among the multiple random access opportunities indicated by different random access configuration information, the multiple random access opportunities are all valid random access opportunities.

In some embodiments, the random access configuration information includes at least one of:

The method comprises the steps of physical random access configuration index, physical random access configuration period, preamble sequence format, message 1 time domain information, number of frequency division random access opportunities of message 1, message 1 frequency domain starting position, preamble target received power, physical random access power lifting step size, maximum transmission times of random access preambles, time window length of random access response, message 1 subcarrier interval, message 3 transmission precoding enabling identification, number of preamble sequences used for competing random access, physical random access root sequence index, initial value of contention resolution timer, message 3 transmission block size threshold, synchronization signal block selection reference signal received power threshold on an extended uplink, total number of preamble sequences of random access of a user, association relation between a synchronization signal block and a random access opportunity, number of preamble sequences based on competition corresponding to each synchronization signal block, restricted set configuration, message 1 repeated transmission identification, message 1 repeated transmission times, subband full duplex configuration, random access opportunity and increased random access opportunity.

The related description may refer to the description in the above technical solutions, and will not be described herein.

It will be appreciated that the communication device, in order to achieve the above-described functions, comprises corresponding hardware structures and/or software modules performing the respective functions. Those of skill in the art will readily appreciate that the algorithm steps of the examples described in connection with the embodiments disclosed herein may be implemented as hardware or a combination of hardware and computer software. Whether a function is implemented as hardware or computer software driven hardware depends upon the particular application and design constraints imposed on the solution. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present disclosure.

The embodiment of the disclosure may divide the functional modules of the communication device according to the embodiment of the method described above, for example, each functional module may be divided for each function, or two or more functions may be integrated into one functional module. The integrated modules described above may be implemented in hardware, or in the form of software. It should be noted that, in the embodiment of the present disclosure, the division of the modules is merely a logic function division, and other division manners may be implemented in actual practice. The following description will take an example of dividing each function module into corresponding functions.

For example, taking a communication device as an example of the first node in the foregoing method embodiment, fig. 18 is a schematic structural diagram of the first node provided in the embodiment of the present disclosure, where the first node may execute the random access method provided in the foregoing method embodiment. As shown in fig. 18, the first node 180 includes a processing unit 1801 and a communication unit 1802.

The communication unit 1802 is configured to receive a target synchronization signal block of at least one synchronization signal block, the at least one synchronization signal block being associated with a plurality of random access configuration information.

The communication unit 1802 is further configured to obtain random access configuration information associated with the target synchronization signal block.

The processing unit 1801 is configured to perform random access based on random access configuration information associated with the target synchronization signal block.

N synchronization signal blocks of the at least one synchronization signal block are associated with k random access configuration information of the plurality of random access configuration information;

wherein n and k are positive integers greater than or equal to 2.

In some embodiments, the processing unit 1801 is configured to determine a system information block associated with the target synchronization signal block, and the communication unit 1802 is configured to obtain random access configuration information associated with the target synchronization signal block from the system information block.

In some embodiments, the target synchronization signal block is associated with m pieces of random access configuration information in the plurality of pieces of random access configuration information, m is a positive integer greater than or equal to 2, and the processing unit 1801 is configured to select first random access configuration information from the m pieces of random access configuration information, and perform random access based on the first random access configuration information.

In some embodiments, the m pieces of random access configuration information respectively correspond to a plurality of measurement quality intervals, and the processing unit 1801 is configured to use, as the first random access configuration information, the random access configuration information corresponding to the measurement quality interval in which the current communication measurement quality is located.

In some embodiments, the processing unit 1801 is further configured to select second random access configuration information from the m random access configuration information in case of a random access failure based on the first random access configuration information, and perform random access based on the second random access configuration information.

In some embodiments, the random access configuration information includes at least one of a physical random access configuration index, a physical random access configuration period, a preamble sequence format, message 1 time domain information, a number of frequency division random access opportunities for message 1, a message 1 frequency domain starting position, a preamble target received power, a physical random access power boost step size, a random access preamble maximum transmission number, a random access response time window length, a message 1 subcarrier spacing, a message 3 transmission precoding enable identification, a preamble sequence number for contention random access, a physical random access root sequence index, a contention resolution timer initial value, a message 3 transmission block size threshold, a synchronization signal block selection reference signal received power threshold, an extended uplink synchronization signal block selection reference signal received power threshold, a user random access preamble sequence total number, a synchronization signal block and random access opportunity association relationship, and a number of preamble opportunity-based preamble opportunity numbers for each synchronization signal block correspondence, a restriction set configuration, a message 1 repetition transmission identification, a message 1 repetition transmission number, a subband full duplex configuration, a random access, an increased random access, wherein the message 1 is a message 1, and the message 1 is a random access request random access sequence in a random access procedure established in the random access procedure.

For example, taking the communication device as the second node in the above method embodiment as an example, fig. 19 is a schematic structural diagram of the second node provided in the embodiment of the present disclosure, where the second node may execute the random access method provided in the above method embodiment. As shown in fig. 19, the second node 190 includes a communication unit 1901.

The communication unit 1901 is configured to transmit a target synchronization signal block of at least one synchronization signal block, where the at least one synchronization signal block is associated with a plurality of random access configuration information.

Wherein n and k are positive integers greater than or equal to 2.

In the case where the functions of the above-described integrated modules are implemented in the form of hardware, the embodiments of the present disclosure provide another possible structure of the communication apparatus referred to in the above-described embodiments. As shown in fig. 20, the communication device 200 includes a processor 2002, a bus 2004. Optionally, the communication device 200 may further comprise a memory 2001, optionally the communication device 200 may further comprise a communication interface 2003.

The processor 2002, which may be a logic block, module, and circuit implementing or executing the various examples described in connection with the embodiments of the present disclosure. The processor 2002 may be a central processor, a general purpose processor, a digital signal processor, an application specific integrated circuit, a field programmable gate array or other programmable logic device, a transistor logic device, a hardware component, or any combination thereof. Which may implement or perform the various exemplary logic blocks, modules and circuits described in connection with embodiments of the disclosure. The processor 2002 may also be a combination of computing functions, e.g., comprising one or more microprocessor combinations, a combination of a DSP and a microprocessor, etc.

Communication interface 2003 for connecting with other devices via a communication network. The communication network may be an ethernet, a radio access network, a wireless local area network (wireless local area networks, WLAN), etc.

Memory 2001, which may be, but is not limited to, read-only memory (ROM) or other type of static storage device that can store static information and instructions, random access memory (random access memory, RAM) or other type of dynamic storage device that can store information and instructions, or electrically erasable programmable read-only memory (ELECTRICALLY ERASABLE PROGRAMMABLE READ-only memory, EEPROM), magnetic disk storage or other magnetic storage device, or any other medium that can be used to carry or store desired program code in the form of instructions or data structures and that can be accessed by a computer.

As a possible implementation, the memory 2001 may exist separately from the processor 2002, and the memory 2001 may be connected to the processor 2002 by a bus 2004 for storing instructions or program code. The processor 2002, when calling and executing instructions or program code stored in the memory 2001, is capable of implementing the methods described in any of the embodiments of the disclosure.

In another possible implementation, the memory 2001 may also be integrated with the processor 2002.

Bus 2004, which may be an extended industry standard architecture (extended industry standard architecture, EISA) bus, or the like. The bus 2004 may be divided into an address bus, a data bus, a control bus, and the like. For ease of illustration, only one thick line is shown in fig. 20, but not only one bus or one type of bus.

Some embodiments of the present disclosure provide a computer readable storage medium (e.g., a non-transitory computer readable storage medium) having stored therein computer program instructions that, when run on a computer, cause the computer to perform a method as described in any of the above embodiments.

By way of example, such computer-readable storage media can include, but are not limited to, magnetic storage devices (e.g., hard Disk, floppy Disk, magnetic strips, etc.), optical disks (e.g., compact Disk, CD, digital versatile Disk (DIGITAL VERSATILE DISK, DVD), etc.), smart cards, and flash Memory devices (e.g., erasable programmable read-Only Memory (EPROM), cards, sticks, key drives, etc.). Various computer-readable storage media described in this disclosure may represent one or more devices and/or other machine-readable storage media for storing information. The term "machine-readable storage medium" can include, without being limited to, wireless channels and various other media capable of storing, containing, and/or carrying instruction(s) and/or data.

The disclosed embodiments provide a computer program product comprising instructions which, when run on a computer, cause the computer to perform the method of any of the above embodiments.

The foregoing is merely a specific embodiment of the disclosure, but the protection scope of the disclosure is not limited thereto, and any changes or substitutions within the technical scope of the disclosure should be covered by the protection scope of the disclosure. Therefore, the protection scope of the present disclosure should be subject to the protection scope of the claims.

Claims

1. A random access method, comprising:

2. The method of claim 1, wherein the at least one synchronization signal block is associated with a plurality of random access configuration information, comprising at least one of:

N synchronization signal blocks of the at least one synchronization signal block are associated with one of the plurality of random access configuration information;

wherein n and k are positive integers greater than or equal to 2.

3. The method according to claim 1, wherein the obtaining random access configuration information associated with the target synchronization signal block comprises:

determining a system information block associated with the target synchronization signal block;

And acquiring random access configuration information associated with the target synchronous signal block from the system information block.

4. The method of claim 1, wherein the target synchronization signal block is associated with m pieces of random access configuration information of the plurality of random access configuration information, m is a positive integer greater than or equal to 2, and wherein the performing random access based on the random access configuration information associated with the target synchronization signal block comprises:

selecting first random access configuration information from the m random access configuration information;

and performing random access based on the first random access configuration information.

5. The method of claim 4, wherein the m pieces of random access configuration information correspond to a plurality of measurement quality intervals, respectively, and wherein the selecting the first random access configuration information from the m pieces of random access configuration information comprises:

and taking random access configuration information corresponding to a measurement quality interval in which the current communication measurement quality is located as the first random access configuration information.

6. The method according to claim 4, wherein the method further comprises:

selecting second random access configuration information from the m random access configuration information in case of a random access failure based on the first random access configuration information;

And performing random access based on the second random access configuration information.

7. The method of claim 1, wherein the synchronization signal block has an association with the random access opportunity.

8. The method of claim 7, wherein the number of random access opportunities associated with different synchronization signal blocks is the same or different.

9. The method of claim 7, wherein a plurality of synchronization signal blocks are associated with a same random access opportunity, and wherein the plurality of synchronization signal blocks are disjoint ranges of random access preamble sequences associated on the random access opportunity.

10. The method of claim 9, wherein a range of random access preamble sequences in the random access configuration information associated with the plurality of synchronization signal blocks is determined by a number of the plurality of synchronization signal blocks.

11. The method of claim 1, wherein the random access configuration information is used to indicate a valid random access opportunity, and wherein a highest priority random access opportunity of the plurality of random access opportunities is a valid random access opportunity if there is a transmission resource overlap among the plurality of random access opportunities indicated by different random access configuration information.

12. The method of claim 11, wherein in the case where there is no transmission resource overlap among a plurality of random access opportunities indicated by different random access configuration information, the plurality of random access opportunities are all valid random access opportunities.

13. The method of claim 1, wherein the random access configuration information comprises at least one of:

The method comprises the steps of physical random access configuration index, physical random access configuration period, preamble sequence format, message 1 time domain information, the number of frequency division random access opportunities of message 1, message 1 frequency domain starting position, preamble target receiving power, physical random access power lifting step size, random access preamble maximum transmission times, time window length of random access response, message 1 subcarrier interval, message 3 transmission precoding enabling identification, the number of preamble sequences used for competing random access, physical random access root sequence index, a contention resolution timer initial value, a message 3 transmission block size threshold, a synchronizing signal block selection reference signal receiving power threshold, an expanding uplink synchronizing signal block selection reference signal receiving power threshold, the total number of preamble sequences of user random access, the association relation between synchronizing signal blocks and random access opportunities, the number of preamble sequences based on competition corresponding to each synchronizing signal block, limit set configuration, message 1 repeated transmission identification, message 1 repeated transmission times, subband full duplex configuration, random access opportunities and increased random access opportunities, wherein the message 1 is a message carrying preamble sequence in a random access process, and the message 3 is used for establishing a random access request process in a message.

14. A random access method, comprising:

15. The method of claim 14, wherein the at least one synchronization signal block is associated with a plurality of random access configuration information, comprising at least one of:

wherein n and k are positive integers greater than or equal to 2.

16. The method of claim 14, wherein a synchronization signal block is associated with a system information block, wherein the system information block includes random access configuration information associated with the synchronization signal block.

17. The method of claim 14, wherein the synchronization signal block has an association with the random access opportunity.

18. The method of claim 17, wherein the number of random access opportunities associated with different synchronization signal blocks is the same or different.

19. The method of claim 17, wherein a plurality of synchronization signal blocks are associated with a same random access opportunity, and wherein the plurality of synchronization signal blocks are associated with random access preamble sequence ranges that do not intersect at the random access opportunity.

20. The method of claim 19, wherein a range of random access preamble sequences in the random access configuration information associated with the plurality of synchronization signal blocks is determined by a number of the plurality of synchronization signal blocks.

21. The method of claim 14, wherein the random access configuration information is used to indicate a valid random access opportunity, and wherein a highest priority random access opportunity of the plurality of random access opportunities is a valid random access opportunity if there is a transmission resource overlap among the plurality of random access opportunities indicated by different random access configuration information.

22. The method of claim 21, wherein in the case where there is no transmission resource overlap among a plurality of random access opportunities indicated by different random access configuration information, the plurality of random access opportunities are all valid random access opportunities.

23. The method of claim 14, wherein the random access configuration information comprises at least one of:

24. A communication device comprising a memory and a processor, the memory and the processor being coupled, the memory being for storing instructions executable by the processor, when executing the instructions, performing the method of any one of claims 1 to 13 or performing the method of any one of claims 14 to 23.

25. A computer readable storage medium having stored thereon computer instructions which, when run on a computer, cause the computer to perform the method of any of claims 1 to 13 or to perform the method of any of claims 14 to 23.

26. A computer program product comprising computer program instructions which, when executed by a processor, implement the method of any one of claims 1 to 13 or perform the method of any one of claims 14 to 23.