Random access method, apparatus and system

Abstract

The present disclosure relates to a random access method, device and system, and relates to the technical field of communication. The random access method comprises: establishing a first association relationship between each SSB and each RRU according to a configuration result of random access, so that each RRU transmits downlink information according to the first association relationship; establishing a second association relationship between each UE and each RRU according to the SSB selected by each UE after detecting the downlink information, and the first association relationship; and managing and scheduling available resources of each RRU according to the second association relationship.

Description

Technical Field

[0001] This disclosure relates to the field of communication technology, and in particular to a random access method, random access device, random access system, and non-volatile computer-readable storage medium. Background Technology

[0002] The mainstream 5G BBU (Baseband Unit) of indoor distribution systems needs to support four 2T2R cells (2 Transmit 2 Receive cells) or two 4T4R cells (4 Output 4 Input). Each HUB (Remote Aggregation Unit) can currently support a maximum of eight RRUs (Remote Radio Units).

[0003] For example, one BBU connects to four HUBs (remote aggregation units), each HUB connects to eight RRUs, and the eight RRUs of each HUB share the same cell ID.

[0004] In related technologies, the HUB of the indoor distribution system of the extended small cell solution can connect to 8 RRUs to broadcast downlink signals simultaneously, and directly merge multiple RRU signals uplink and transmit them back to the BBU. Summary of the Invention

[0005] The inventors of this disclosure have discovered the following problems in the above-mentioned related technologies: the downlink signal transmission consumes a lot of power, and the downlink signal transmission has the technical problem of increased noise floor, which leads to a decrease in communication quality.

[0006] In view of this, this disclosure proposes a random access technology solution that can reduce energy consumption and avoid raising the noise floor, thereby improving communication quality.

[0007] According to some embodiments of this disclosure, a random access method is provided, comprising: establishing a first association relationship between each SSB (Synchronization Signal / Physical Broadcast Channel Block) and each RRU according to the configuration result of random access, so that each RRU sends downlink information according to the first association relationship; establishing a second association relationship between each UE and each RRU according to the SSB selected by each UE (User Equipment) after detecting downlink information and the first association relationship; and managing and scheduling the available resources of each RRU according to the second association relationship.

[0008] In some embodiments, establishing a first association between each SSB and each Radio Remote Unit (RRU) based on the configuration result of random access, so that each RRU can send downlink information based on the first association, includes: determining relevant information about the available resources of each RRU based on the first association; and sending the relevant information about each available resource to each RRU so that each RRU can send downlink information on its respective available resources.

[0009] In some embodiments, the information related to the available resources of each RRU includes a time-frequency location map of SSBs that have a first association with each RRU. The time-frequency location map is used to instruct each RRU to perform punching on the time-frequency resources of SSBs that do not have a first association, so as to determine their respective available resources.

[0010] In some embodiments, the random access method further includes configuring random access in a broadcast message before establishing a first association, such that a random access event can map multiple SSBs.

[0011] In some embodiments, establishing a second association between each UE and each RRU based on the SSB selected by each UE after detecting downlink information and the first association includes: determining the SSB selected by each UE based on the random access preamble sequence selected by each UE.

[0012] In some embodiments, sending information about each available resource to each RRU includes sending information about each available resource to each RRU via at least one of a fronthaul interface protocol and an operator-specific network management protocol.

[0013] In some embodiments, the random access method further includes: identifying and updating the second association relationship according to the SRS (Sounding Reference Signal) configuration.

[0014] According to some other embodiments of this disclosure, a random access device is provided, comprising: an establishment unit, configured to establish a first association relationship between each SSB and each RRU according to the configuration result of random access, so that each RRU sends downlink information according to the first association relationship, and establish a second association relationship between each UE and each RRU according to the SSB selected by each UE after detecting downlink information and the first association relationship; and a management unit, configured to manage and schedule the available resources of each RRU according to the second association relationship.

[0015] In some embodiments, the establishment unit determines relevant information about the available resources of each RRU based on a first association relationship; the random access device further includes: a transmission unit, configured to transmit relevant information about each available resource to each RRU so that each RRU can transmit downlink information on its respective available resources.

[0016] In some embodiments, the information related to the available resources of each RRU includes a time-frequency location map of SSBs that have a first association with each RRU. The time-frequency location map is used to instruct each RRU to perform punching on the time-frequency resources of SSBs that do not have a first association, so as to determine their respective available resources.

[0017] In some embodiments, before establishing the first association, the establishing unit configures the random access in the broadcast message so that a random access opportunity can map multiple SSBs.

[0018] In some embodiments, the establishment unit determines the SSB selected by each UE based on the random access preamble sequence selected by each UE.

[0019] In some embodiments, the sending unit sends relevant information about each available resource to each RRU through at least one of the fronthaul interface protocol and the operator's private network management protocol.

[0020] In some embodiments, the random access device further includes an update unit for identifying and updating the second association relationship according to the SRS configuration.

[0021] According to further embodiments of this disclosure, a random access system is provided, comprising: a random access device for executing the random access method in any of the above embodiments; and a plurality of RRUs for sending downlink information according to a first association relationship established by the random access device.

[0022] According to further embodiments of the present disclosure, a random access device is provided, comprising: a memory; and a processor coupled to the memory, the processor being configured to execute the random access method of any of the above embodiments based on instructions stored in the memory device.

[0023] According to further embodiments of the present disclosure, a non-volatile computer-readable storage medium is provided having a computer program stored thereon that, when executed by a processor, implements the random access method of any of the above embodiments.

[0024] In the above embodiments, based on the established association between SSB and RRU, the association between UE and RRU is established according to the SSB selected by the UE. In this way, each RRU only sends signals to the associated UE on its own available resources, thereby reducing power consumption, avoiding noise floor increase, and improving communication quality. Attached Figure Description

[0025] The accompanying drawings, which form part of this specification, illustrate embodiments of this disclosure and, together with the specification, serve to explain the principles of this disclosure.

[0026] This disclosure will become clearer with reference to the accompanying drawings and the following detailed description:

[0027] Figure 1 Flowcharts illustrating some embodiments of the random access method of this disclosure are shown;

[0028] Figure 2 Schematic diagrams showing some embodiments of a three-tier architecture for a 5G indoor extended small cell;

[0029] Figure 3a Schematic diagrams illustrating some embodiments of the random access method of this disclosure;

[0030] Figure 3b Schematic diagrams illustrating some embodiments of the random access method of this disclosure;

[0031] Figure 4 Block diagrams illustrating some embodiments of the random access apparatus of this disclosure;

[0032] Figure 5 Block diagrams illustrating other embodiments of the random access apparatus of this disclosure;

[0033] Figure 6 Block diagrams illustrating further embodiments of the random access apparatus of this disclosure;

[0034] Figure 7 Block diagrams illustrating some embodiments of the random access system of this disclosure are shown. Detailed Implementation

[0035] Various exemplary embodiments of the present disclosure will now be described in detail with reference to the accompanying drawings. It should be noted that, unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps set forth in these embodiments do not limit the scope of the present disclosure.

[0036] At the same time, it should be understood that, for ease of description, the dimensions of the various parts shown in the accompanying drawings are not drawn according to actual scale.

[0037] The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit this disclosure or its application or use.

[0038] Techniques, methods, and equipment known to a person skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and equipment should be considered part of the license specification.

[0039] In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values.

[0040] It should be noted that similar labels and letters in the following figures indicate similar items; therefore, once an item is defined in one figure, it does not need to be discussed further in subsequent figures.

[0041] As mentioned earlier, based on the ORAN (Open Radio Access Network) standard, the fronthaul interface allocation method between BBU (Block BU), DU (Distributed Unit), and RRU can refer to Option 6, but the cost is high; Option 7-2 and Option 8 (maximum fronthaul bandwidth) can be considered, but there will be an uplink noise floor increase problem.

[0042] For example, the functional division and noise floor increase analysis of Option 6, Option 7-2, and Option 8 are shown in the table below:

[0043] Table 1

[0044]

[0045]

[0046] In Table 1, IF stands for Intermediate Frequency, PHY for Physical Layer, UL for Uplink, and DL for Downlink. High-PHY and Low-PHY are further subdivisions of the L1 PHY layer in 5G systems. High-PHY refers to software entities in L1 that are not directly and strongly correlated with the DSP (Digital Signal Processor), while Low-PHY refers to software entities that are strongly correlated with the DSP. RLC stands for RadioLink Control. PDCP stands for Packet Data Convergence Protocol. Core Network refers to the core network; Optical Multiplexer is an optical multiplexer; and FHGW stands for fronthaul Gateway.

[0047] To avoid excessive uplink noise floor increase, the number of RRUs connected to the HUB (using the same cell ID) should be small.

[0048] However, due to the limited fronthaul interface bandwidth of indoor distribution systems (e.g., 10G), the number of cells that can be supported simultaneously within a BBU is typically four (option 6 may support more, but at a higher cost). Therefore, the procurement cost of future 5G indoor distribution systems for operators will be directly related to the number of cells. To reduce indoor coverage costs, the number of RRUs connected to the HUB (using the same cell ID) should be as large as possible, as different RRUs may be distributed across different indoor spaces, floors, etc.

[0049] For BBU, it is currently impossible to associate the UE with the RRU that receives the UE's uplink useful signal. Downlink requires all RRUs to broadcast the same information, which consumes a lot of energy. Uplink, merging multiple RRU signals will lead to increased noise floor and a more complex interference environment.

[0050] For new indoor coverage of 5G in non-hotspot areas or to fill blind spots, there is a need to provide a low-cost indoor coverage solution using 5G NR (New Radio) extended small base stations.

[0051] Therefore, improvements are needed to the fronthaul solution currently widely tested and verified in the industry for option 7-2. A new initial random access scheme for indoor coverage suitable for 5G NR extended small base stations needs to be designed to establish an initial association list between RRUs and UEs. This will enable RRU-based radio resource management and scheduling optimization, saving RRU energy consumption, supporting a larger number of RRUs with the same cell ID connected on the HUB, and reducing excessive uplink noise floor rise.

[0052] To address the aforementioned technical issues, this disclosure restricts random access configuration and performs puncturing operations on some SSB resources of the RRU, enabling the base station to learn the specific single or multiple RRUs associated with the UE through the random access preamble sequence and establish an RRU index-UE ID association list. This solution solves the problem that the BBU cannot identify UE access to the RRU when they have the same cell ID, enabling the base station to perform RRU-based radio resource management and scheduling optimization, saving RRU power consumption, and reducing the noise floor rise caused by RRU uplink merging.

[0053] For example, the technical solution of this disclosure can be implemented through the following embodiments.

[0054] Figure 1 Flowcharts illustrating some embodiments of the random access method of this disclosure are shown.

[0055] like Figure 1 As shown, in step 110, a first association relationship is established between each SSB and each RRU according to the configuration result of random access, so that each RRU can send downlink information according to the first association relationship.

[0056] In some embodiments, random access in broadcast messages is configured before the first association is established, such that a random access event can map multiple SSBs.

[0057] In some embodiments, the random access configuration set in the cell-level SIB1 (System Information Block) system message broadcast of the base station or OAM (Operation Administration and Maintenance) is subject to mandatory restrictions.

[0058] For example, the `ssb-perRACH-OccasionAndCB-PreamblesPerSSB` configuration can be specified in `rach-ConfigCommon` and / or `msgA-ConfigCommon` (corresponding to 4-step RA and 2-step RA respectively) of `BWP-UplinkCommon`, ensuring that N is greater than 1. That is, an SSB index `n` is mapped to 1 / N random access opportunities (existing standards support 2, 4, 8, 16, etc.), allowing one random access opportunity to map to N SSBs. For example, when 8 RRUs use the same cell ID, N is configured to 8.

[0059] In some embodiments, the base station or OAM establishes a first association between the SSB index and the RRU index based on the random access configuration in the broadcast message (such as SIB1). For example, when the number of SSBs is greater than or equal to the number of RRUs, a one-to-one or many-to-one first association between SSBs and RRUs is established; when the number of SSBs is less than the number of RRUs, a one-to-many first association is established.

[0060] In some embodiments, based on a first association, relevant information about the available resources of each RRU is determined; the relevant information about each available resource is sent to each RRU so that each RRU can send downlink information on its respective available resources.

[0061] For example, relevant information about each available resource can be sent to each RRU through at least one of the fronthaul interface protocol and the operator's private network management protocol.

[0062] For example, the relevant information on the available resources of each RRU includes a time-frequency location map of SSBs that have (or do not have) a first association with each RRU. The time-frequency location map is used to instruct each RRU to punch the time-frequency resources of SSBs that do not have a first association in order to determine their respective available resources.

[0063] For example, the time-frequency location map is used to indicate that each RRU determines the time-frequency resource location of the SSB that needs to be sent in the downlink information based on the SSB with which it has a first association, thereby punching the time-frequency resources of SSBs that do not have a first association.

[0064] In some embodiments, the base station or OAM generates a time-frequency location map of the SSBs unrelated to each RRU based on the first association between the SSB and the RRU and the random access configuration (e.g., N>1), and sends it to the RRU. For example, the base station or OAM can send this data via a fronthaul interface protocol or a private network management protocol of the operator.

[0065] In some embodiments, the BBU or DU (Distributed Unit) sends the time-frequency resources after performing RE-mapping (Resource Element-mapping) to the RRU; the RRU, according to the received time-frequency location map of the unrelated SSBs, performs puncturing on the corresponding unrelated SSBs when broadcasting SS (Synchronization Signal) or PBCH (Physical Broadcast Channel) downlink.

[0066] In this way, SSB time-frequency resources that are not associated with the current RRU can be eliminated, and only the SSB blocks associated with the current RRU can be retained, and then subsequent iFFT (inverse fast Fourier transform) and other operations can be performed.

[0067] In step 120, based on the SSB selected by each UE after detecting downlink information and the first association relationship, a second association relationship is established between each UE and each RRU.

[0068] In some embodiments, the SSB selected by each UE is determined based on the random access preamble sequence selected by each UE.

[0069] In some embodiments, the user equipment monitors the cell broadcast SSB and initiates random access with relevant configuration based on the selected SSB index. The base station identifies the SSB index selected by the UE based on the contention-based preamble sequence number used by the UE for random access, thereby establishing an association list between the RRU index and the UE ID.

[0070] In step 130, the available resources of each RRU are managed and scheduled according to the second association relationship.

[0071] In some embodiments, the second association is identified and updated according to the SRS configuration. The RRU index and UE ID association list are updated. For example, the identification and updating of UE-associated RRUs can be performed based on SRS reference signal configuration, etc.

[0072] In some embodiments, based on the RRU index and UE ID association list, the base station performs radio resource management for each RRU and scheduling of at least one of time division and frequency division.

[0073] In the above embodiments, random access is configured through base stations or OAM, limiting the value of N>1 in the NR standard configuration. This does not modify the 3GPP (3rd Generation Partnership Project) standard, and the base station implementation scheme is simple with low complexity of independent research and development.

[0074] By establishing an association between the SSB index and the RRU, the base station or OAM sends management or control signaling to notify the RRU of the SSB time-frequency pattern that needs to be punched. The signaling can be transmitted using existing operator-proprietary network management protocols or using fronthaul interface control and management protocols, resulting in low implementation threshold and low complexity for independent research and development.

[0075] The RRU performs a punching operation based on the SSB time-frequency position pattern before iFFT. The solution is simple and easy to implement, and the complexity of independent research and development is low.

[0076] The UE can receive different SSB signals under different RRUs and initiate random access using the random access preamble sequence corresponding to different SSB numbers. The base station establishes an association list between the UE and the RRU based on the random access preamble sequence used by the UE. This method does not modify the existing 5G standard, has a simple implementation scheme, and solves the problem of determining the specific location of the UE and its association with the RRU when the RRUs belong to different spatial segments.

[0077] The base station can group UEs according to their association with RRUs, and optimize higher-level signaling configuration, radio resource management, and scheduling schemes based on each RRU. This helps to support more RRUs with the same cell ID in a three-tier indoor distribution architecture, providing indoor coverage coverage and coverage in non-hotspot areas, and significantly reducing costs.

[0078] Figure 2 The diagram illustrates some embodiments of a three-tiered structure for a 5G indoor extended cell.

[0079] like Figure 2 As shown, the mainstream 5G BBU for indoor distribution systems needs to support four 2T2R cells or two 4T4R cells. Each HUB can currently support a maximum of eight RRU connections.

[0080] For example, one BBU connects to four HUBs, each HUB connects to eight RRUs, and the eight RRUs of each HUB have the same cell ID.

[0081] Figure 3a Schematic diagrams illustrating some embodiments of the random access method of this disclosure are shown.

[0082] like Figure 3a As shown, a mandatory restriction is imposed on the random access configuration set in the cell-level SIB1 system message broadcast of the base station or OAM.

[0083] For example, the `ssb-perRACH-OccasionAndCB-PreamblesPerSSB` configuration can be specified in `rach-ConfigCommon` and / or `msgA-ConfigCommon` (corresponding to 4-step RA and 2-step RA respectively) of `BWP-UplinkCommon`, ensuring that N is greater than 1. That is, an SSB index `n` is mapped to 1 / N random access opportunities (existing standards support 2, 4, 8, 16, etc.), allowing one random access opportunity to map to N SSBs. For example, when 8 RRUs use the same cell ID, N is configured to 8.

[0084] In some embodiments, the base station or OAM establishes a first association between the SSB index and the RRU index based on the random access configuration in the broadcast message (such as SIB1). For example, when the number of SSBs is greater than or equal to the number of RRUs, a one-to-one or many-to-one first association between SSBs and RRUs is established; when the number of SSBs is less than the number of RRUs, a one-to-many first association is established.

[0085] In some embodiments, the base station or OAM generates a time-frequency location map of the SSBs unrelated to each RRU based on the first association between the SSB and the RRU and the random access configuration (e.g., N>1), and sends it to the RRU. For example, the base station or OAM can send this data via a fronthaul interface protocol or a private network management protocol of the operator.

[0086] In some embodiments, the BBU or DU sends the time-frequency resources after performing RE-mapping to the RRU; the RRU performs puncturing on the corresponding unrelated SSBs when broadcasting SS or PBCH downlink according to the received time-frequency location map of the unrelated SSBs.

[0087] In this way, SSB time-frequency resources that are not associated with the current RRU can be eliminated, and only the SSB blocks associated with the current RRU can be retained, and then subsequent iFFT (inverse fast Fourier transform) and other operations can be performed.

[0088] In some embodiments, the user equipment monitors the cell broadcast SSB and initiates random access with relevant configuration based on the selected SSB index. The base station identifies the SSB index selected by the UE based on the contention-based preamble sequence number used by the UE for random access, thereby establishing an association list between the RRU index and the UE ID.

[0089] In some embodiments, the RRU index and UE ID association list are updated. For example, the identification and updating of UE-associated RRUs can be performed based on SRS reference signal configuration, etc.

[0090] In some embodiments, based on the RRU index and UE ID association list, the base station performs radio resource management for each RRU and scheduling of at least one of time division and frequency division.

[0091] Figure 3b Schematic diagrams illustrating some embodiments of the random access method of this disclosure are shown.

[0092] like Figure 3b As shown, 5G NR random access supports both traditional 4-step random access and low-latency 2-step random access. The 3GPP standard supports the configuration of Synchronization Signal Broadcast Channel Block (SSB) and Random Occasion (RO). Taking 4-step random access as an example, the mapping relationship between random access opportunities, preamble sequences, and SSBs, as defined in the standard, follows the following guidelines.

[0093] When N<1, an SSBn (n=1) is mapped to 1 / N random access opportunities and R contention-based preamble sequences, which are numbered consecutively from 0.

[0094] When N>=1, one SSBn (n=1,2,…,N) maps to 1 / N random access opportunities and R contention-based preamble sequences, with the preamble sequences being derived from… Start with consecutive numbering. This indicates the total number of available leader sequences.

[0095] In some embodiments, a 4-step random access method is used as an example. During initial access, the UE listens to the SSB and uses different random access timings and preamble sequences depending on the selected SSB. For example, if the UE selects to use SSB2 (which has a mapping relationship with preamble sequences numbered 16 to 23) based on the reference signal received power, then on the time-frequency resources corresponding to random access timing 0, a preamble sequence is randomly selected from the preamble sequences numbered 16 to 23 for random access.

[0096] Therefore, during initial access, the UE listens to the SSB and will use different random access timings and preamble sequences depending on the selected SSB.

[0097] In some embodiments, N=4, R=8; RRUi converges in one HUB (remote convergence unit) and shares the same cell ID, i=0, 1, 2, 3; RRU0, RRU1 and RRU2, RRU3 are not on the same floor or in the same room.

[0098] The association relationships between each SSB and each RRU established according to any of the above embodiments, and the association relationships between the UE and the SSB, are shown in the figure.

[0099] For example, when UE0 uses preamble sequence 6, SSB0 is selected accordingly, and the association between UE0 and RRU0 is established based on the association between SSB0 and RRU0; when UE1 uses preamble sequence 20, SSB2 is selected accordingly, and the association between UE1 and RRU2 is established based on the association between SSB2 and RRU2.

[0100] Figure 4 Block diagrams illustrating some embodiments of the random access apparatus of this disclosure are shown.

[0101] like Figure 4 As shown, the random access device 4 includes an establishment unit 41 and a management unit 42.

[0102] Based on the configuration results of random access, the establishment unit 41 establishes a first association relationship between each SSB and each RRU, so that each RRU can send downlink information according to the first association relationship; based on the SSB selected by each UE after detecting downlink information and the first association relationship, a second association relationship is established between each UE and each RRU.

[0103] Management unit 42 is used to manage and schedule the available resources of each RRU according to the second association relationship.

[0104] In some embodiments, the establishment unit 41 determines the relevant information of the available resources of each RRU according to the first association relationship; the random access device 4 further includes: a sending unit 43, which sends the relevant information of each available resource to each RRU so that each RRU can send downlink information on its respective available resources.

[0105] In some embodiments, the information related to the available resources of each RRU includes a time-frequency location map of SSBs that have a first association with each RRU. The time-frequency location map is used to instruct each RRU to perform punching on the time-frequency resources of SSBs that do not have a first association, so as to determine their respective available resources.

[0106] In some embodiments, before establishing the first association, the establishment unit 41 configures the random access in the broadcast message so that a random access opportunity can map multiple SSBs.

[0107] In some embodiments, the establishment unit 41 determines the SSB selected by each UE based on the random access preamble sequence selected by each UE.

[0108] In some embodiments, the sending unit 43 sends relevant information about each available resource to each RRU through at least one of the fronthaul interface protocol and the operator's private network management protocol.

[0109] In some embodiments, the random access device 4 further includes an update unit 44, configured to identify and update the second association relationship according to the SRS configuration.

[0110] Figure 5 Block diagrams illustrating other embodiments of the random access apparatus of this disclosure are shown.

[0111] like Figure 5 As shown, the random access device 5 of this embodiment includes a memory 51 and a processor 52 coupled to the memory 51. The processor 52 is configured to execute the random access method in any embodiment of this disclosure based on instructions stored in the memory 51.

[0112] The memory 51 may include, for example, system memory, fixed non-volatile storage media, etc. The system memory stores, for example, the operating system, application programs, a boot loader, a database, and other programs.

[0113] Figure 6 Block diagrams illustrating further embodiments of the random access apparatus of this disclosure are shown.

[0114] like Figure 6 As shown, the random access device 6 of this embodiment includes a memory 610 and a processor 620 coupled to the memory 610. The processor 620 is configured to execute the random access method of any of the foregoing embodiments based on instructions stored in the memory 610.

[0115] The memory 610 may include, for example, system memory, fixed non-volatile storage media, etc. The system memory stores, for example, the operating system, application programs, a boot loader, and other programs.

[0116] The random access device 6 may also include an input / output interface 630, a network interface 640, and a storage interface 650. These interfaces 630, 640, and 650, as well as the memory 610 and processor 620, can be connected via, for example, a bus 660. The input / output interface 630 provides a connection interface for input / output devices such as a monitor, mouse, keyboard, touchscreen, microphone, and speakers. The network interface 640 provides a connection interface for various networked devices. The storage interface 650 provides a connection interface for external storage devices such as SD cards and USB flash drives.

[0117] Figure 7 Block diagrams illustrating some embodiments of the random access system of this disclosure are shown.

[0118] like Figure 7 As shown, the random access system 7 includes: a random access device 71, used to execute the random access method in any of the above embodiments; and a plurality of RRUs 72, used to send downlink information according to a first association relationship established by the random access device.

[0119] Those skilled in the art will understand that embodiments of this disclosure can be provided as methods, systems, or computer program products. Therefore, this disclosure can take the form of a completely hardware embodiment, a completely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, this disclosure can take the form of a computer program product embodied on one or more computer-usable non-transitory storage media containing computer-usable program code, including but not limited to disk storage, CD-ROM, optical storage, etc.

[0120] This concludes the detailed description of the random access method, random access apparatus, random access system, and non-volatile computer-readable storage medium according to the present disclosure. To avoid obscuring the concept of this disclosure, some details known in the art have not been described. Those skilled in the art will fully understand how to implement the technical solutions disclosed herein based on the above description.

[0121] The methods and systems of this disclosure may be implemented in many ways. For example, they may be implemented by software, hardware, firmware, or any combination of software, hardware, and firmware. The above-described order of steps for the methods is for illustrative purposes only, and the steps of the methods of this disclosure are not limited to the order specifically described above unless otherwise specifically stated. Furthermore, in some embodiments, this disclosure may also be implemented as a program recorded on a recording medium, the program including machine-readable instructions for implementing the methods according to this disclosure. Thus, this disclosure also covers recording media storing programs for performing the methods according to this disclosure.

[0122] While specific embodiments of this disclosure have been described in detail by way of example, those skilled in the art should understand that the examples are for illustrative purposes only and not intended to limit the scope of this disclosure. Those skilled in the art should understand that modifications can be made to the above embodiments without departing from the scope and spirit of this disclosure. The scope of this disclosure is defined by the appended claims.

Claims

1. A random access method, comprising: Based on multiple Radio Remote Units (RRUs) with the same cell identifier, random access in broadcast messages is configured so that one random access opportunity can map multiple Synchronization Signal Physical Broadcast Channel Blocks (SSBs). Based on the configuration results of random access, a first association relationship is established between each synchronization signal physical broadcast channel block (SSB) and each radio frequency remote unit (RRU), so that each RRU can send downlink information according to the first association relationship; Based on the SSB selected by each user equipment (UE) after detecting the downlink information, and the first association relationship, a second association relationship is established between each UE and each RRU. Based on the second association relationship, the available resources of each RRU are managed and scheduled. The step of establishing a second association between each UE and each RRU based on the SSB selected by each UE after detecting the downlink information and the first association relationship includes: Based on the random access preamble sequence selected by each UE, the SSB selected by each UE after detecting the downlink information is determined.

2. The random access method according to claim 1, wherein, The step of establishing a first association relationship between each SSB and each Radio Remote Unit (RRU) based on the configuration results of random access, so that each RRU can send downlink information according to the first association relationship, includes: Based on the first association relationship, determine the relevant information of the available resources of each RRU; The relevant information of each available resource is sent to each RRU so that each RRU can send the downlink information on its respective available resource.

3. The random access method according to claim 2, wherein, The relevant information regarding the available resources of each RRU includes the time-frequency location map of SSBs that have the first association relationship with each RRU. The time-frequency location map is used to instruct each RRU to perform punching processing on the time-frequency resources of SSBs that do not have the first association relationship, so as to determine their respective available resources.

4. The random access method according to claim 2, wherein, Sending relevant information about each available resource to each RRU includes: The relevant information of each available resource is sent to each RRU through at least one of the fronthaul interface protocol and the operator's private network management protocol.

5. The random access method according to any one of claims 1-4, further comprising: The second correlation is identified and updated based on the SRS configuration.

6. A random access device, comprising: The establishment unit is used to establish a first association relationship between each Synchronization Signal Physical Broadcast Channel Block (SSB) and each Radio Remote Unit (RRU) based on the configuration results of random access, so that each RRU can send downlink information according to the first association relationship, and establish a second association relationship between each UE and each RRU based on the SSB selected by each UE after detecting the downlink information and the first association relationship. The management unit is used to manage and schedule the available resources of each RRU according to the second association relationship. Before establishing the first association, the establishing unit configures the random access in the broadcast message based on multiple remote radio units (RRUs) with the same cell identifier, so that one random access opportunity can map to multiple SSBs. The establishment unit determines the SSB selected by each UE based on the random access preamble sequence selected by each UE.

7. The random access device according to claim 6, wherein, The establishing unit determines the relevant information of the available resources of each RRU based on the first association relationship; Also includes: The sending unit is used to send relevant information about each available resource to each RRU, so that each RRU can send the downlink information on its respective available resource.

8. The random access device according to claim 7, wherein, The relevant information regarding the available resources of each RRU includes the time-frequency location map of SSBs that have the first association relationship with each RRU. The time-frequency location map is used to instruct each RRU to perform punching processing on the time-frequency resources of SSBs that do not have the first association relationship, so as to determine their respective available resources.

9. The random access device according to claim 7, wherein, The sending unit sends the relevant information of each available resource to each RRU through at least one of the fronthaul interface protocol and the operator's private network management protocol.

10. The random access device according to any one of claims 6-9, further comprising: The update unit is used to identify and update the second association relationship according to the SRS configuration.

11. A random access system, comprising: A random access device for performing the random access method according to any one of claims 1-5; Multiple radio frequency remote units (RRUs) are used to send downlink information based on the first association established by the random access device.

12. A random access device, comprising: Memory; and A processor coupled to the memory, the processor being configured to execute the random access method of any one of claims 1-5 based on instructions stored in the memory.

13. A non-volatile computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, implements the random access method according to any one of claims 1-5.

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