Random access method, system, electronic device and computer readable storage medium

Abstract

The present disclosure provides a random access method and device, and electronic equipment and a computer readable storage medium, relating to the technical field of communication. Wherein, the target device communicates through a source base station, and the random access method comprises: the target device determines to switch from the source base station to a target base station; the source base station acquires a first bandwidth part (BWP) in which the target device currently works; and the source base station controls the target device to randomly access the target base station according to the first bandwidth part (BWP). In the embodiment of the present disclosure, the source base station controls the target device to randomly access the target base station in the first bandwidth part in which the target device currently works, so as to reduce or even avoid service interruption, thereby reducing device power consumption.

Description

Technical Field

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

[0002] When a terminal is handover, it needs to re-establish a connection with the target cell and obtain uplink synchronization through a random access process. At this time, the terminal may need to switch from the currently used bandwidth segment (BWP) to the preset initial bandwidth segment (BWP) of the base station to be accessed (e.g., 20M), which may cause terminal data interruption and power consumption waste.

[0003] To address the aforementioned issues, this patent proposes a method for resolving data interruptions caused by bandwidth segment (BWP) switching.

[0004] It should be noted that the information disclosed in the background section above is only used to enhance the understanding of the background of this disclosure. Summary of the Invention

[0005] The purpose of this disclosure is to provide a random access method, system, electronic device, and computer-readable storage medium that can solve the problem of data terminal and power consumption waste caused by bandwidth segment BWP handover during cell handover.

[0006] Other features and advantages of this disclosure will become apparent from the following detailed description, or may be learned in part from practice of this disclosure.

[0007] This disclosure provides a random access method, including: a target device determining to switch from a source base station to a target base station; the source base station acquiring a first bandwidth segment (BWP) where the target device is currently operating; and the source base station controlling the target device to randomly access the target base station according to the first bandwidth segment (BWP).

[0008] In some embodiments, the source base station controls the target device to randomly access the target base station based on the first bandwidth segment BWP, including: the source base station sending the first bandwidth segment BWP to the target base station to determine whether there are resources corresponding to the first bandwidth segment BWP in the target base station; if it is determined that there are resources corresponding to the first bandwidth segment BWP in the target base station, the source base station instructs the target device to randomly access the target base station with the first bandwidth segment BWP as the initial bandwidth segment.

[0009] In some embodiments, the target base station includes a preset initial bandwidth segment; wherein, the method further includes: when it is determined that there are no resources corresponding to the first bandwidth segment BWP in the target base station, the source base station instructs the target device to randomly access the target base station with the preset initial bandwidth segment as the initial bandwidth segment.

[0010] In some embodiments, the method further includes: after the target device randomly accesses the target base station with the first bandwidth segment BWP as the initial bandwidth segment, the target base station instructs the target device to activate the first bandwidth segment BWP for the first time.

[0011] In some embodiments, the target base station includes a default first activated bandwidth segment (BWP); wherein the method includes: after the target device randomly accesses the target base station with the first bandwidth segment BWP as the initial bandwidth segment, the target base station instructs the target device to activate the first bandwidth segment as the default first activated bandwidth segment.

[0012] In some embodiments, the target base station is provided with a preset initial bandwidth segment (BWP); wherein, the source base station controls the target device to randomly access the target base station according to the first bandwidth segment (BWP), including: the source base station sending the first bandwidth segment (BWP) to the target base station to determine whether there are resources corresponding to the first bandwidth segment (BWP) in the target base station; the source base station instructing the target device to randomly access the target base station with the preset initial bandwidth segment (BWP) in the target device as the initial bandwidth segment; and when it is determined that there are resources corresponding to the first bandwidth segment (BWP) in the target base station, the target base station instructs the target device to activate the first bandwidth segment of the first bandwidth segment (BWP) for the first time.

[0013] In some embodiments, the target device determines whether to switch from the source base station to the target base station, including: the target device initiating a cell handover in the source cell corresponding to the source base station; and the target device initiating a neighbor cell measurement to determine whether to switch from the source base station to the target base station.

[0014] In some embodiments, the target device initiates cell handover in the source cell corresponding to the source base station, including: the target device determines that the measurement information of the target device has reached the handover threshold during periodic measurement, or the target device determines that the communication signal is poor during movement, or the source base station determines that the communication signal of the target device is poor, and then the target device initiates cell handover in the source cell corresponding to the source base station.

[0015] This disclosure provides a random access system, including: a source base station and a target device communicating through the source base station.

[0016] The target device is used to determine when to switch from the source base station to the target base station; the source base station is used to obtain the first bandwidth segment (BWP) where the target device is currently operating, and to control the target device to randomly access the target base station according to the first bandwidth segment (BWP).

[0017] This disclosure provides an electronic device comprising: one or more processors; and a storage device for storing one or more programs, wherein when the one or more programs are executed by the electronic device, the electronic device enables the random access method described in any of the preceding embodiments.

[0018] This disclosure provides a computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, implements the random access method as described in any of the preceding embodiments.

[0019] This disclosure provides a computer program product or computer program that includes computer instructions stored in a computer-readable storage medium. A processor of a computer device reads the computer instructions from the computer-readable storage medium and executes the computer instructions, causing the computer device to perform the aforementioned random access method.

[0020] The random access method, system, electronic device, and computer-readable storage medium provided in this disclosure allow the source base station to control the target device to randomly access the target device based on the first bandwidth segment (BWP) where the target device is currently operating, thereby reducing or avoiding the switching of the bandwidth segment (BWP) during cell handover and thus reducing or avoiding service interruption and power consumption waste of the target device.

[0021] It should be understood that the above general description and the following detailed description are merely exemplary and do not limit this disclosure. Attached Figure Description

[0022] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this disclosure and, together with the description, serve to explain the principles of this disclosure. It is obvious that the drawings described below are merely some embodiments of this disclosure, and those skilled in the art can obtain other drawings based on these drawings without any inventive effort.

[0023] Figure 1 An exemplary system architecture diagram is shown that can be applied to the random access method or random access device in the embodiments of this disclosure.

[0024] Figure 2 This is a flowchart illustrating a random access method according to an exemplary embodiment.

[0025] Figure 3 This is a schematic diagram illustrating a random access method according to an exemplary embodiment.

[0026] Figure 4 This is a flowchart illustrating a random access method according to an exemplary embodiment.

[0027] Figure 5 This is a flowchart illustrating a random access method according to an exemplary embodiment.

[0028] Figure 6This is a flowchart illustrating a random access method according to an exemplary embodiment.

[0029] Figure 7 This is a flowchart illustrating a random access method according to an exemplary embodiment.

[0030] Figure 8 This is a flowchart illustrating a random access method according to an exemplary embodiment.

[0031] Figure 9 This is a flowchart illustrating a random access method according to an exemplary embodiment.

[0032] Figure 10 This is a flowchart illustrating a random access method according to an exemplary embodiment.

[0033] Figure 11 This is a reference diagram illustrating a random access system according to an exemplary embodiment.

[0034] Figure 12 A schematic diagram of the structure of an electronic device suitable for implementing embodiments of the present disclosure is shown. Detailed Implementation

[0035] Exemplary embodiments will now be described more fully with reference to the accompanying drawings. However, these exemplary embodiments can be implemented in many forms and should not be construed as limited to the embodiments set forth herein; rather, they are provided so that this disclosure will be thorough and complete, and will fully convey the concept of the exemplary embodiments to those skilled in the art. The same reference numerals in the drawings denote the same or similar parts, and therefore repeated descriptions of them will be omitted.

[0036] The features, structures, or characteristics described in this disclosure can be combined in any suitable manner in one or more embodiments. Numerous specific details are provided in the following description to give a thorough understanding of embodiments of this disclosure. However, those skilled in the art will recognize that the technical solutions of this disclosure can be practiced with one or more specific details omitted, or other methods, components, apparatuses, steps, etc., can be employed. In other instances, well-known methods, apparatuses, implementations, or operations are not shown or described in detail to avoid obscuring various aspects of this disclosure.

[0037] The accompanying drawings are merely illustrative of this disclosure, and the same reference numerals in the drawings denote the same or similar parts, thus omitting repeated descriptions of them. Some block diagrams shown in the drawings do not necessarily correspond to physically or logically independent entities. These functional entities may be implemented in software, in one or more hardware modules or integrated circuits, or in different network and / or processor devices and / or microcontroller devices.

[0038] The flowchart shown in the accompanying drawings is merely illustrative and does not necessarily include all content and steps, nor does it require execution in the described order. For example, some steps may be broken down, while others may be combined or partially combined; therefore, the actual execution order may change depending on the specific circumstances.

[0039] In the description of this application, unless otherwise stated, " / " means "or," for example, A / B can mean A or B. "And / or" in this document is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A alone, A and B simultaneously, and B alone. Furthermore, "at least one" means one or more, and "multiple" means two or more. The terms "first," "second," etc., do not limit the quantity or order of execution, and "first," "second," etc., do not necessarily imply differences; the terms "contains," "includes," and "has" are used to indicate an open-ended inclusion meaning and refer to the existence of additional elements / components / etc. besides the listed elements / components / etc.

[0040] To better understand the above-mentioned objectives, features and advantages of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that, unless otherwise specified, the embodiments and features in the embodiments of this application can be combined with each other.

[0041] In 5G NR, the carrier bandwidth on the network side is becoming increasingly larger, far exceeding the receiving capabilities of the terminal. To support the terminal's capabilities, the concept of BWP (Bandwidth Part) is introduced. By dividing the large bandwidth on the network side into multiple bandwidth segments, one or more (up to four) BWPs from the serving cell are configured for the terminal, and some of the configured BWPs are activated for uplink and downlink transmission. For the terminal, only one DL (downlink) BWP and one UL (uplink) BWP can be activated at any given time. If SUL is used, two UL BWPs are activated. Inactive BWPs cannot perform uplink and downlink signaling transmission or uplink and downlink data transmission.

[0042] During the Random Access Procedure (RAP), the terminal uses an initial bandwidth segment (BWP) (e.g., 20 Mbps) for access. The position of the initial BWP is affected by the starting PRB. However, when the terminal enters the connected state for the actual scheduling process, it will use a different BWP: for example, in eMBB (enhanced Mobile Broadband) scenarios, a BWP exceeding 20 Mbps may be needed, while in industrial scenarios such as Redcap UE and power-saving scenarios, only a 5 Mbps BWP is required. If the terminal undergoes reconstruction or handover during service provision, the BWP needs to be switched back to the initial BWP for the RAP procedure, and a connection needs to be established with the target cell to achieve uplink synchronization.

[0043] When a terminal is handing over a cell, it needs to measure neighboring cells and report the measurement results. The base station will exchange data and then transmit the handover information to the terminal. The terminal will then re-establish a connection with the target cell and obtain uplink synchronization based on the exchanged information through a random access procedure.

[0044] However, when the terminal is switching cells, it needs to re-establish a connection with the target cell and obtain uplink synchronization through a random access process. At this time, the terminal may need to switch from the currently used bandwidth segment BWP to a preset initial bandwidth segment BWP (e.g., 20M) for access, which may cause terminal data interruption and power consumption waste.

[0045] To address the aforementioned issues, this patent proposes a method for resolving data interruptions caused by bandwidth segment (BWP) switching.

[0046] The exemplary embodiments of this disclosure will now be described in detail with reference to the accompanying drawings.

[0047] Figure 1 An exemplary system architecture diagram is shown that can be applied to the random access method or random access device in the embodiments of this disclosure.

[0048] like Figure 1 As shown, the system architecture includes target device 101, network 102, source base station 103, and target base station 104.

[0049] Network 102 is a medium used to provide a communication link between target device 101, source base station 103 and target base station 104. It can be a wired network, a wireless network, or a fiber optic cable, etc.

[0050] Optionally, the aforementioned wireless network, wired network, or fiber optic cable may use standard communication technologies and / or protocols. The network is typically the Internet, but can also be any network, including but not limited to Local Area Networks (LANs), Metropolitan Area Networks (MANs), Wide Area Networks (WANs), mobile, wired or wireless networks, private networks, or any combination of virtual private networks. In some embodiments, technologies and / or formats including Hyper Text Markup Language (HTML), Extensible Markup Language (XML), etc., are used to represent data exchanged over the network. Furthermore, conventional encryption technologies such as Secure Socket Layer (SSL), Transport Layer Security (TLS), Virtual Private Network (VPN), and Internet Protocol Security (IPsec) may be used to encrypt all or some links. In other embodiments, custom and / or dedicated data communication technologies may be used to replace or supplement the aforementioned data communication technologies.

[0051] Users can use target device 101 to interact with other devices via network 102 and source base station 103 to receive or send messages. The target device can be a mobile phone, tablet computer, laptop computer, personal digital assistant (PDA), mobile internet device (MID), wearable device, desktop computer, virtual reality device, smart home device, or in-vehicle device, etc. It should be noted that the specific type of terminal is not limited in this embodiment of the invention.

[0052] The aforementioned base station can be a 5G or later version base station (e.g., 5G NR NB), or a base station in other communication systems (e.g., eNB base station). It should be noted that the specific type of base station is not limited in the embodiments disclosed herein.

[0053] In some embodiments, when the target device 101 switches from the source base station 103 to the target base station 104, it may perform the following steps: the target device determines to switch from the source base station to the target base station; the source base station obtains the first bandwidth segment (BWP) where the target device is currently operating; the source base station controls the target device to randomly access the target base station according to the first bandwidth segment (BWP).

[0054] Those skilled in the art will know that Figure 1 The number of target devices, base stations, and networks shown is merely illustrative; any number of terminals, networks, and servers can be included depending on actual needs. This disclosure does not limit the scope of the embodiments.

[0055] Under the above system architecture, this disclosure provides a random access method.

[0056] Figure 2 This is a flowchart illustrating a random access method according to an exemplary embodiment.

[0057] In this embodiment, the target device can communicate through the source base station.

[0058] Reference Figure 2 The random access method provided in this disclosure may include the following steps.

[0059] Step S202: The target device determines whether to switch from the source base station to the target base station.

[0060] In some embodiments, the target device may determine whether to switch from the source base station to the target base station based on communication signals or communication parameters. The source base station and the target base station may be different base stations.

[0061] Step S204: The source base station obtains the first bandwidth segment (BWP) where the target device is currently operating.

[0062] In some embodiments, when a target device determines that it needs to switch from a source base station to a target base station, the target device sends the first bandwidth segment BWP (i.e., the currently active bandwidth segment) in which the target device is currently operating to the source base station. In some embodiments, if the target device is not currently operating, the target device sends the first bandwidth segment BWP in which it was last operating to the source base station. In summary, when a target device needs to switch from a source base station to a target base station, it uploads the bandwidth segment BWP in which it was most recently operating to the source base station.

[0063] In step S206, the source base station controls the target device to randomly access the target base station according to the first bandwidth segment BWP.

[0064] The random access process refers to the process from when a user sends a random access preamble to attempt to access the network until a basic signaling connection is established with the network. Random access is a crucial step in mobile communication systems and the final step in establishing a communication link between the terminal and the base station.

[0065] In related technologies, when a target device randomly accesses a target base station, it uses a preset initial bandwidth segment (BWP) (e.g., 20M or 100M) in the communication protocol as its initial bandwidth segment. However, this preset initial bandwidth is fixed and unrelated to the target device's current services. Therefore, if the target device still has services during the handover process from the source base station to the target base station, the need for the target device to switch from its currently active first bandwidth segment (BWP) to the preset initial bandwidth segment (BWP) in the communication protocol will cause service interruption in the target device, affecting service smoothness and user experience.

[0066] The technical solution provided in this embodiment allows the source base station to control the target device to randomly access the target base station based on the first bandwidth segment where the target device is currently operating or the bandwidth segment where it previously operated, so that the bandwidth segment does not change when the target device performs random access, thus avoiding service interruption for the target device.

[0067] In some embodiments, when a target device randomly accesses a target base station, it uses a preset initial bandwidth segment (BWP) (e.g., 20M or 100M) in the communication protocol as its initial bandwidth segment. However, this preset initial bandwidth is fixed and unrelated to the target device's current service. Therefore, if the target device has an ongoing service during the handover process from the source base station to the target base station, the target device needs to switch from the currently active first bandwidth segment (BWP) to the preset initial bandwidth segment (BWP) in the communication protocol, resulting in service interruption and power wastage. This also affects service smoothness and user experience.

[0068] Figure 3 This is a schematic diagram illustrating a random access method according to an exemplary embodiment.

[0069] refer to Figure 3 The above-mentioned random access method may include the following steps.

[0070] Step S302: The target device determines whether to switch from the source base station to the target base station.

[0071] Step S304: The source base station obtains the first bandwidth segment (BWP) where the target device is currently operating.

[0072] In step S306, the source base station sends the first bandwidth segment BWP to the target base station in order to determine whether the target base station has resources corresponding to the first bandwidth segment BWP.

[0073] In some embodiments, after receiving the first bandwidth fragment BWP sent by the target device, the source base station will send the first bandwidth fragment BWP to the target base station so that the target base station can determine whether it has resources (e.g., air interface resources) corresponding to the first bandwidth fragment BWP.

[0074] In step S308, if it is determined that there are resources corresponding to the first bandwidth segment BWP in the target base station, the source base station instructs the target device to randomly access the target base station with the first bandwidth segment BWP as the initial bandwidth segment.

[0075] In some embodiments, when the target base station determines that it has resources corresponding to the first bandwidth segment BWP, it determines that the target base station can provide the service corresponding to the first bandwidth segment BWP to the target base device. Therefore, the target base station will return the corresponding information to the source base station to inform the target base station that it can switch the target device over.

[0076] Therefore, if it is determined that there are resources corresponding to the first bandwidth segment BWP in the target base station, the source base station will instruct the target device to randomly access the target base station with the first bandwidth segment BWP as the initial bandwidth segment.

[0077] The initial bandwidth segment can be the first bandwidth segment when the target device randomly accesses the target base station. After the target device accesses the target base station, it will adjust the bandwidth segment it operates in according to service requirements, and this application does not impose any restrictions on this.

[0078] The technical solution provided in this embodiment allows the source base station to control the target device to randomly access the target base station based on the first bandwidth segment (BWP) where the target device is currently operating or the bandwidth segment (BWP) where it previously operated. This ensures that the bandwidth segment (BWP) does not change when the target device performs random access, thus avoiding service interruption and power consumption waste for the target device.

[0079] Figure 4 This is a flowchart illustrating a random access method according to an exemplary embodiment.

[0080] In some embodiments, the target base station may include a preset initial bandwidth segment, wherein the preset initial bandwidth segment may refer to the initial bandwidth segment set in the communication protocol when a device accesses the base station.

[0081] refer to Figure 4 The above-mentioned random access method may include the following steps.

[0082] Step S402: The target device determines whether to switch from the source base station to the target base station.

[0083] Step S404: The source base station obtains the first bandwidth segment (BWP) where the target device is currently operating.

[0084] In step S406, the source base station sends the first bandwidth segment BWP to the target base station in order to determine whether the target base station has resources corresponding to the first bandwidth segment BWP.

[0085] In step S408, if it is determined that there are resources corresponding to the first bandwidth segment BWP in the target base station, the source base station instructs the target device to randomly access the target base station with the first bandwidth segment BWP as the initial bandwidth segment.

[0086] In step S410, if it is determined that there are no resources corresponding to the first bandwidth segment BWP in the target base station, the source base station instructs the target device to randomly access the target base station with a preset initial bandwidth segment as the initial bandwidth segment.

[0087] The technical solution provided in this embodiment allows the source base station to control the target device to randomly access the target base station based on the first bandwidth segment (BWP) where the target device is currently operating or the bandwidth segment (BWP) where it previously operated. This ensures that the bandwidth segment (BWP) does not change when the target device performs random access, thus avoiding service interruption and power consumption waste for the target device.

[0088] Figure 5 This is a flowchart illustrating a random access method according to an exemplary embodiment.

[0089] Generally, when a target device accesses a target base station with an initial bandwidth segment, the target base station will send one or more (up to four) bandwidth segments to the target device and activate some bandwidth segments (for example, one bandwidth segment will be activated) to perform uplink and downlink transmission between the target device and the target base station.

[0090] In some embodiments, the target base station may be provided with a preset first activation bandwidth segment (BWP), wherein the preset first activation bandwidth segment (BWP) is a bandwidth segment provided in the base station, and the first activation bandwidth segment may be included in one or more bandwidth segments first sent by the target base station to the target device.

[0091] In related technologies, after a target device connects to a target base station, the first bandwidth segment activated can be a preset initial activation bandwidth segment. However, in these technologies, the target device needs to switch from the initial bandwidth segment to this initial activation bandwidth segment, and then switch to the bandwidth segment required for operation based on actual needs. This results in multiple service interruptions for the target device and wasted power.

[0092] Therefore, this application proposes the following technical solutions to solve the above problems.

[0093] refer to Figure 5The above-mentioned random access method may include the following steps.

[0094] Step S502: The target device determines whether to switch from the source base station to the target base station.

[0095] Step S504: The source base station obtains the first bandwidth segment (BWP) where the target device is currently operating.

[0096] In step S506, the source base station sends the first bandwidth segment BWP to the target base station in order to determine whether the target base station has resources corresponding to the first bandwidth segment BWP.

[0097] In step S508, if it is determined that there are resources corresponding to the first bandwidth segment BWP in the target base station, the source base station instructs the target device to randomly access the target base station with the first bandwidth segment BWP as the initial bandwidth segment.

[0098] In step S510, after the target device randomly accesses the target base station with the first bandwidth segment BWP as the initial bandwidth segment, the target base station instructs the target device to activate the first bandwidth segment BWP for the first time.

[0099] The technical solution provided in this embodiment uses the first bandwidth segment for both the initial bandwidth segment and the first activated bandwidth segment when the target device accesses the target base station. This ensures that the target device's operating bandwidth remains unchanged when it switches from the source base station to the target base station, thereby preventing service interruption for the target device.

[0100] Figure 6 This is a flowchart illustrating a random access method according to an exemplary embodiment.

[0101] In some embodiments, the target base station may be configured with a preset initial activation bandwidth segment (BWP), which is a bandwidth segment configured in the base station. Generally, when a device accesses the target base station with an initial bandwidth segment, it will switch to the preset initial activation bandwidth segment (BWP) in the target base station, and then switch to the bandwidth segment required for operation according to actual needs. This multiple switching of bandwidth segments will cause multiple service interruptions in the target device and result in wasted power consumption.

[0102] refer to Figure 6 The above-mentioned random access method may include the following steps.

[0103] Step S602: The target device determines whether to switch from the source base station to the target base station.

[0104] Step S604: The source base station obtains the first bandwidth segment (BWP) where the target device is currently operating.

[0105] In step S606, the source base station sends the first bandwidth segment BWP to the target base station in order to determine whether the target base station has resources corresponding to the first bandwidth segment BWP.

[0106] In step S608, the source base station instructs the target device to randomly access the target base station using a preset initial bandwidth segment BWP in the target device as the initial bandwidth segment.

[0107] In step S610, if it is determined that there are resources corresponding to the first bandwidth segment BWP in the target base station, the target base station instructs the target device to activate the first bandwidth segment BWP for the first time.

[0108] The technical solution provided in this embodiment replaces the preset initial activation bandwidth segment (BWP) set for the target device in the target base station with the first bandwidth segment (BWP) that the target device is currently working on. This allows the target device to directly switch to the first bandwidth segment after randomly accessing the target base station with the preset initial bandwidth segment, reducing the number of bandwidth segment switching, thereby reducing the number of service interruptions and lowering power consumption.

[0109] Figure 7 This is a flowchart illustrating a random access method according to an exemplary embodiment.

[0110] refer to Figure 7 The above-mentioned random access method may include the following steps.

[0111] Step S702: The target device initiates a cell handover in the source cell corresponding to the source base station.

[0112] In some embodiments, when a target device detects that its own signal is poor, or its own signal meets the handover threshold for cell handover, the target device will determine that it needs to initiate cell handover in the source cell corresponding to the source base station.

[0113] In some embodiments, when the target base station detects that the target device has a poor signal or cannot receive the target device's signal, or determines that the target device meets the handover threshold for cell handover.

[0114] Step S704: The target device initiates a neighbor cell measurement to determine whether the target device has switched from the source base station to the target base station.

[0115] Step S706: The source base station obtains the first bandwidth segment (BWP) where the target device is currently operating.

[0116] In step S708, the source base station controls the target device to randomly access the target base station according to the first bandwidth segment BWP.

[0117] The technical solution provided in this embodiment can detect in a timely manner the actual need for cell handover of the target device, so that the target device can initiate cell measurement in a timely manner to determine the target base station to which the target device should hand over, and send the first bandwidth segment BWP to the source base station, so that the source base station can control the target device to randomly access the network according to the first bandwidth segment BWP.

[0118] Figure 8 This is a flowchart illustrating a random access method according to an exemplary embodiment.

[0119] If the target device determines that its measurement information has reached the handover threshold during periodic measurement, or if the target device determines that its communication signal is poor during movement, or if the source base station determines that the target device's communication signal is poor, then the target device will initiate a cell handover in the source cell corresponding to the source base station.

[0120] refer to Figure 8 The above-mentioned random access method may include the following steps.

[0121] Step S802: The target device initiates a cell handover in the source cell corresponding to the source base station.

[0122] Step S804: The target device initiates a neighbor cell measurement to determine whether the target device has switched from the source base station to the target base station.

[0123] Step S806: The source base station obtains the first bandwidth segment (BWP) where the target device is currently operating.

[0124] In step S808, the source base station sends the first bandwidth segment (BWP) to the target base station.

[0125] In step S810, the target base station determines whether it has the resources corresponding to the first bandwidth segment BWP.

[0126] In some embodiments, if the target base station has a first bandwidth segment, the target base station will send an indication message to the source base station to instruct the source base station to perform step S812.

[0127] In some embodiments, if the target base station does not have a first bandwidth segment, the target base station will send an indication message to the source base station to instruct the source base station to perform step S814.

[0128] In step S812, the source base station instructs the target device to randomly access the target base station using the first bandwidth segment BWP as the initial bandwidth segment.

[0129] In step S814, the source base station instructs the target device to randomly access the target base station using a preset initial bandwidth segment as the initial bandwidth segment.

[0130] The technical solution provided in this embodiment allows the source base station to control the target device to randomly access the target base station based on the first bandwidth segment where the target device is currently operating or the bandwidth segment where it previously operated, so that the bandwidth segment does not change when the target device performs random access, thus avoiding service interruption for the target device.

[0131] Figure 9 This is a flowchart illustrating a random access method according to an exemplary embodiment.

[0132] refer to Figure 9 The above-mentioned random access method may include the following steps.

[0133] Step S902: The target device initiates a cell handover in the source cell corresponding to the source base station.

[0134] Step S904: The target device initiates a neighbor cell measurement to determine whether the target device has switched from the source base station to the target base station.

[0135] Step S906: The source base station obtains the first bandwidth segment (BWP) where the target device is currently operating.

[0136] In step S908, the source base station sends the first bandwidth segment (BWP) to the target base station.

[0137] In step S910, the target base station determines whether it has the resources corresponding to the first bandwidth segment BWP.

[0138] In some embodiments, if the target base station has a first bandwidth segment, the target base station will send an indication message to the source base station to instruct the source base station to perform steps S912 to S914.

[0139] In some embodiments, if the target base station does not have a first bandwidth segment, the target base station will send an indication message to the source base station to instruct the source base station to perform step S916.

[0140] In step S912, the source base station instructs the target device to randomly access the target base station using the first bandwidth segment BWP as the initial bandwidth segment.

[0141] In step S914, the target base station indicates that the first bandwidth segment activated by the target device is the first bandwidth segment BWP, or the target base station indicates that the first bandwidth segment activated by the target device is the default first activated bandwidth segment.

[0142] In step S916, the source base station instructs the target device to randomly access the target base station with a preset initial bandwidth segment as the initial bandwidth segment.

[0143] Figure 10 This is a flowchart illustrating a random access method according to an exemplary embodiment.

[0144] refer to Figure 10 The above-mentioned random access method may include the following steps.

[0145] Step S1002: The target device initiates cell handover in the source cell corresponding to the source base station.

[0146] Step S1004: The target device initiates a neighbor cell measurement to determine whether the target device has switched from the source base station to the target base station.

[0147] Step S1006: The source base station obtains the first bandwidth segment (BWP) where the target device is currently operating.

[0148] In step S1008, the source base station sends the first bandwidth segment (BWP) to the target base station.

[0149] In step S1010, the source base station instructs the target device to randomly access the target base station using a preset bandwidth segment BWP as the initial bandwidth segment.

[0150] In step S1012, the target base station determines whether it has the resources corresponding to the first bandwidth segment BWP.

[0151] In some embodiments, if the target base station has a first bandwidth segment, the target base station will send an indication message to the source base station to instruct the source base station to perform step S1014.

[0152] In some embodiments, if the target base station does not have a first bandwidth segment, the target base station will send an indication message to the source base station to instruct the source base station to perform step S1016.

[0153] In step S1014, the target base station indicates that the first bandwidth segment activated by the target device is the first bandwidth segment BWP.

[0154] In step S1016, the target base station indicates that the bandwidth segment activated by the target device for the first time is the default first-time activated bandwidth segment.

[0155] The technical solution provided in this embodiment can, when the target base station meets the resources required by the first bandwidth segment BWP, instruct the target device to activate the first bandwidth segment for the first time, thereby reducing the number of activations of the bandwidth segment BWP, reducing the number of interruptions and power consumption waste.

[0156] Based on the same inventive concept, this disclosure also provides a random access system, see reference. Figure 11 The random access system may include: a target device communicating with a source base station, a target base station, and a source base station.

[0157] Among them, the target device that communicates with the source base station can be used to determine the handover from the source base station to the target base station; the source base station can be used to obtain the first bandwidth segment (BWP) where the target device is currently operating, and control the target device to randomly access the target base station according to the first bandwidth segment (BWP).

[0158] In addition to the aforementioned random access system, this disclosure also proposes a random access method that allows the network to configure a suitable BWP for the target device based on the most recently used BWP and resource allocation information reported by the target device, thereby ensuring data connectivity for the target device and improving user experience.

[0159] 1. Core idea:

[0160] 1) When reporting measurements, the target device exchanges the most recently used BWP with the base station;

[0161] 2) The network configures the BWP on the target device based on the BWP information and corresponding resource conditions.

[0162] 3) The target device performs random access according to network instructions to obtain uplink synchronization.

[0163] The specific method can be embodied as follows:

[0164] 1) The target device performs neighboring area measurements;

[0165] 2) The target device reports the measurement results and the most recently used BWP;

[0166] 3) The base station assesses its own air interface resources;

[0167] 4a) If the air interface resources meet the requirements of the target equipment, the corresponding BWP resources are reported and sent out;

[0168] 4b) If the air interface resources do not meet the requirements of the target equipment, the corresponding resources will not be issued.

[0169] 5) The target device initiates random access to obtain synchronization according to the base station configuration. If there is no configuration, the initial BWP is used for initial access.

[0170] The above method will be explained below with specific embodiments, but this application is not limited thereto.

[0171] Example 1: The source cell is 5G NR cell 1, the target cell is 5G NR cell 2, the target device 1 is a mobile phone target device, and the BWP is 100M.

[0172] 1) Target device 1 initiates a target device handover in the source cell and performs neighbor cell measurements;

[0173] 2) Target device 1 reports the measurement results to the source cell base station;

[0174] 3) The original base station sends a handover request to the target base station and reports that the BWP most recently used by target device 1 is 100M;

[0175] 4) The target base station assesses its own air interface resources;

[0176] 5) The air interface resources meet the requirements of the target equipment, and 100M BWP resources are allocated.

[0177] 6) The target device initiates random access to the target base station using the same BWP.

[0178] Example 2: The source cell is 5G NR cell 1, the target cell is 5G NR cell 2, the target device 1 is a mobile phone target device, and the BWP is 100M.

[0179] 1) Target device 1 initiates a target device handover in the source cell and performs neighbor cell measurements;

[0180] 2) Target device 1 reports the measurement results to the source cell base station;

[0181] 3) The original base station sends a handover request to the target base station and reports that the BWP most recently used by target device 1 is 100M;

[0182] 4) The target base station assesses its own air interface resources;

[0183] 5) The air interface resources do not meet the requirements of the target equipment, so BWP resources are not configured.

[0184] 6) The target device initiates random access to the target base station using the initial BWP (20M).

[0185] Example 3: The source cell is 5G NR cell 1, the target cell is 5G NR cell 2, the target device 1 is a redcap target device, and the BWP used is 5M.

[0186] 1) Target device 1 initiates a target device handover in the source cell and performs neighbor cell measurements;

[0187] 2) Target device 1 reports the measurement results to the source cell base station;

[0188] 3) The original base station sends a handover request to the target base station and reports that the BWP most recently used by the target device 1 is 5M;

[0189] 4) The target base station assesses its own air interface resources;

[0190] 5) The air interface resources meet the requirements of the target equipment, and 5M BWP resources are allocated.

[0191] 6) The target device uses the BWP to initiate random access to the target base station.

[0192] This disclosure is based on the BWP used by the target device in its most recent data service report, and increases the base station's ability to identify whether its air interface resources and the target device's requirements are consistent; thus ensuring the controllability of the base station's BWP configuration for accessing the target device.

[0193] In this embodiment, when the target device switches over while the data service is still being transmitted, it reports the BWP used for the data service once during random access, thereby reducing data interruption or latency caused by BWP switching.

[0194] This embodiment does not limit the expansion of the BWP size used by the target device in the future; it only requires reporting the BWP used in the most recent data transmission. Simultaneously, the operator can control base station air interface resources to ensure that the target device is not affected by handover / connection reconstruction during data transmission, guaranteeing data transmission continuity and thus enhancing user experience.

[0195] To address the data interruption issue caused by the target device needing to reuse the initial BWP for access during random access, this embodiment proposes to assist the network in identifying the BWP most recently used by the target device based on the target device's report, ensuring that the target device uses a BWP with the same bandwidth for data transmission, reducing data interruptions, and thus enhancing the user experience.

[0196] In some embodiments, controlling the target device to randomly access the target base station according to the first bandwidth segment BWP includes: the source base station sending the first bandwidth segment BWP to the target base station to determine whether there is a resource corresponding to the first bandwidth segment BWP in the target base station; if it is determined that there is a resource corresponding to the first bandwidth segment BWP in the target base station, the source base station instructs the target device to randomly access the target base station with the first bandwidth segment BWP as the initial bandwidth segment.

[0197] In some embodiments, the target base station includes a preset initial bandwidth segment; the source base station is further configured to, when it is determined that there are no resources corresponding to the first bandwidth segment BWP in the target base station, instruct the target device to randomly access the target base station with the preset initial bandwidth segment as the initial bandwidth segment.

[0198] In some embodiments, the target base station that presets the first activation bandwidth segment (BWP) is further configured to:

[0199] After the target device randomly accesses the target base station with the first bandwidth segment BWP as the initial bandwidth segment, the target device is instructed to activate the first bandwidth segment BWP for the first time.

[0200] In some embodiments, the target base station includes a default first-activated bandwidth segment (BWP); the target base station is further configured to: after the target device randomly accesses the target base station with the first bandwidth segment BWP as the initial bandwidth segment, the target base station instructs the target device to activate the bandwidth segment for the first time as the default first-activated bandwidth segment.

[0201] In some embodiments, the target base station is provided with a preset initial bandwidth segment (BWP); wherein, controlling the target device to randomly access the target base station according to the first bandwidth segment (BWP) includes: the source base station sending the first bandwidth segment (BWP) to the target base station to determine whether there are resources corresponding to the first bandwidth segment (BWP) in the target base station; the source base station instructing the target device to randomly access the target base station using the preset initial bandwidth segment (BWP) in the target device as the initial bandwidth segment; and when it is determined that there are resources corresponding to the first bandwidth segment (BWP) in the target base station, the target base station instructs the target device to activate the first bandwidth segment of the first bandwidth segment (BWP) for the first time.

[0202] In some embodiments, determining a handover from the source base station to the target base station includes: the target device initiating a cell handover in the source cell corresponding to the source base station; and the target device initiating a neighbor cell measurement to determine that the target device is handing over from the source base station to the target base station.

[0203] In some embodiments, the target device initiates cell handover in the source cell corresponding to the source base station, including: the target device determining that its measurement information reaches a handover threshold during periodic measurement, or the target device determining a communication signal difference during movement, or the source base station determining a communication signal difference in the target device, and then the target device initiates cell handover in the source cell corresponding to the source base station.

[0204] Since the functions of the random access system have been described in detail in their respective method embodiments, they will not be repeated here.

[0205] The flowcharts and block diagrams in the accompanying drawings illustrate the architecture, functionality, and operation of possible implementations of systems, methods, and computer program products according to various embodiments of this application. In this regard, each block in a flowchart or block diagram may represent a module, segment, or portion of code containing one or more executable instructions for implementing a specified logical function. It should also be noted that in some alternative implementations, the functions indicated in the blocks may occur in a different order than those indicated in the drawings. For example, two consecutively indicated blocks may actually be executed substantially in parallel, and they may sometimes be executed in reverse order, depending on the functions involved. It should also be noted that each block in a block diagram or flowchart, and combinations of blocks in a block diagram or flowchart, may be implemented using a dedicated hardware-based system that performs the specified function or operation, or using a combination of dedicated hardware and computer instructions.

[0206] Furthermore, the above figures are merely illustrative of the processes included in the method according to exemplary embodiments of this disclosure and are not intended to be limiting. It is readily understood that the processes shown in the above figures do not indicate or limit the temporal order of these processes. Additionally, it is readily understood that these processes may be executed synchronously or asynchronously, for example, in multiple modules.

[0207] Figure 12 A schematic diagram of the structure of an electronic device suitable for implementing embodiments of the present disclosure is shown. It should be noted that... Figure 12 The illustrated electronic device 1200 is merely an example and should not be construed as limiting the functionality and scope of use of the embodiments disclosed herein.

[0208] like Figure 12 As shown, the electronic device 1200 includes a central processing unit (CPU) 1201, which can perform various appropriate actions and processes according to a program stored in a read-only memory (ROM) 1202 or a program loaded from a storage section 1208 into a random access memory (RAM) 1203. The RAM 1203 also stores various programs and data required for the operation of the electronic device 1200. The CPU 1201, ROM 1202, and RAM 1203 are interconnected via a bus 1204. An input / output (I / O) interface 1205 is also connected to the bus 1204.

[0209] The following components are connected to I / O interface 1205: an input section 1206 including a keyboard, mouse, etc.; an output section 1207 including a cathode ray tube (CRT), liquid crystal display (LCD), etc., and speakers, etc.; a storage section 1208 including a hard disk, etc.; and a communication section 1209 including a network interface card such as a LAN card, modem, etc. The communication section 1209 performs communication processing via a network such as the Internet. A drive 1210 is also connected to I / O interface 1205 as needed. Removable media 1211, such as a disk, optical disk, magneto-optical disk, semiconductor memory, etc., are installed on drive 1210 as needed so that computer programs read from them can be installed into storage section 1208 as needed.

[0210] In particular, according to embodiments of this disclosure, the processes described above with reference to the flowcharts can be implemented as computer software programs. For example, embodiments of this disclosure include a computer program product comprising a computer program carried on a computer-readable storage medium, the computer program containing program code for performing the methods shown in the flowcharts. In such embodiments, the computer program can be downloaded and installed from a network via communication section 1209, and / or installed from removable medium 1211. When the computer program is executed by central processing unit (CPU) 1201, it performs the functions defined above in the system of this application.

[0211] It should be noted that the computer-readable storage medium disclosed herein may be a computer-readable signal medium or a computer-readable storage medium, or any combination thereof. A computer-readable storage medium may be, for example,—but not limited to—an electrical, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or any combination thereof. More specific examples of a computer-readable storage medium may include, but are not limited to: an electrical connection having one or more wires, a portable computer disk, a hard disk, random access memory (RAM), read-only memory (ROM), erasable programmable read-only memory (EPROM or flash memory), optical fiber, portable compact disk read-only memory (CD-ROM), optical storage device, magnetic storage device, or any suitable combination thereof. In this application, a computer-readable storage medium may be any tangible medium containing or storing a program that can be used by or in conjunction with an instruction execution system, apparatus, or device. In this application, a computer-readable signal medium may include a data signal propagated in baseband or as part of a carrier wave, carrying computer-readable program code. Such propagated data signals may take various forms, including but not limited to electromagnetic signals, optical signals, or any suitable combination thereof. Computer-readable signal media can also be any computer-readable storage medium other than a computer-readable storage medium, which can send, propagate, or transmit a program for use by or in connection with an instruction execution system, apparatus, or device. The program code contained on the computer-readable storage medium can be transmitted using any suitable medium, including but not limited to: wireless, wire, optical fiber, RF, etc., or any suitable combination thereof.

[0212] In another aspect, this application also provides a computer-readable storage medium, which may be included in the device described in the above embodiments; or it may exist independently and not assembled into the device. The computer-readable storage medium carries one or more programs, which, when executed by the device, enable the device to perform the following functions: the target device determines whether to switch from the source base station to the target base station; the source base station obtains the first bandwidth segment (BWP) where the target device is currently operating; and the source base station controls the target device to randomly access the target base station according to the first bandwidth segment (BWP).

[0213] According to one aspect of this application, a computer program product or computer program is provided, comprising computer instructions stored in a computer-readable storage medium. A processor of a computer device reads the computer instructions from the computer-readable storage medium and executes the computer instructions, causing the computer device to perform the methods provided in various optional implementations of the above embodiments.

[0214] Through the above description of the embodiments, those skilled in the art will readily understand that the exemplary embodiments described herein can be implemented by software or by combining software with necessary hardware. Therefore, the technical solutions of the embodiments of this disclosure can be embodied in the form of a software product, which can be stored in a non-volatile storage medium (such as a CD-ROM, USB flash drive, external hard drive, etc.) and includes several instructions to cause a computing device (such as a personal computer, server, mobile terminal, or smart device, etc.) to execute the method according to the embodiments of this disclosure, for example... Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 ... Figure 7 , Figure 8 , Figure 9 , Figure 10 or Figure 11 One or more of the steps shown.

[0215] Other embodiments of this disclosure will readily occur to those skilled in the art upon consideration of the specification and practice disclosed herein. This disclosure is intended to cover any variations, uses, or adaptations of this disclosure that follow the general principles of this disclosure and include common knowledge or customary techniques in the art not claimed herein. The specification and examples are to be considered exemplary only, and the true scope and spirit of this disclosure are indicated by the claims.

[0216] It should be understood that this disclosure is not limited to the detailed structures, drawing arrangements or implementations shown herein; rather, this disclosure is intended to cover various modifications and equivalent arrangements contained within the spirit and scope of the appended claims.

Claims

1. A random access method, characterized in that, The target device communicates through the source base station, including: The target device determines to switch from the source base station to the target base station; wherein when the target device determines to switch from the source base station to the target base station, the target device sends the bandwidth segment currently activated by the target device to the source base station as the first bandwidth segment BWP in which it is currently working; wherein if the target device is not currently working, the target device sends the bandwidth segment in which it was working last time to the source base station as the first bandwidth segment BWP. The source base station obtains the first bandwidth segment (BWP) where the target device is currently operating; The source base station controls the target device to randomly access the target base station according to the first bandwidth segment BWP; the source base station controlling the target device to randomly access the target base station according to the first bandwidth segment BWP includes: The source base station sends the first bandwidth segment BWP to the target base station in order to determine whether there are resources corresponding to the first bandwidth segment BWP in the target base station; If it is determined that there are resources corresponding to the first bandwidth segment BWP in the target base station, the source base station instructs the target device to randomly access the target base station with the first bandwidth segment BWP as the initial bandwidth segment; After the target device randomly accesses the target base station with the first bandwidth segment BWP as the initial bandwidth segment, the target base station instructs the target device to activate the first bandwidth segment BWP.

2. The method according to claim 1, characterized in that, The target base station includes a preset initial bandwidth segment; wherein, the method further includes: If it is determined that there are no resources corresponding to the first bandwidth segment BWP in the target base station, the source base station instructs the target device to randomly access the target base station with a preset initial bandwidth segment as the initial bandwidth segment.

3. The method according to claim 1, characterized in that, The target base station includes the default first-activated bandwidth segment (BWP). The method includes: After the target device randomly accesses the target base station with the first bandwidth segment BWP as the initial bandwidth segment, the target base station instructs the target device to activate the first bandwidth segment as the default first activated bandwidth segment.

4. The method according to claim 1, characterized in that, The target base station is equipped with a preset initial bandwidth segment (BWP); wherein, the source base station controls the target device to randomly access the target base station according to the first bandwidth segment (BWP), including: The source base station sends the first bandwidth segment BWP to the target base station in order to determine whether there are resources corresponding to the first bandwidth segment BWP in the target base station; The source base station instructs the target device to randomly access the target base station using the preset initial bandwidth segment (BWP) in the target device as the initial bandwidth segment; If it is determined that the target base station has resources corresponding to the first bandwidth segment BWP, the target base station instructs the target device to activate the first bandwidth segment BWP for the first time.

5. The method according to claim 1, characterized in that, The determination of the target device to switch from the source base station to the target base station includes: The target device initiates a cell handover in the source cell corresponding to the source base station; The target device initiates a neighbor cell measurement to determine whether it has switched from the source base station to the target base station.

6. The method according to claim 5, characterized in that, The target device initiates a cell handover in the source cell corresponding to the source base station, including: If the target device determines that its measurement information has reached a handover threshold during periodic measurement, or if the target device determines that its communication signal is poor during movement, or if the source base station determines that the target device's communication signal is poor, then the target device initiates a cell handover in the source cell corresponding to the source base station.

7. A random access system, characterized in that, include: The target device that communicates with the source base station is used to determine the handover from the source base station to the target base station; When the target device determines that it needs to switch from the source base station to the target base station, the target device will send the bandwidth segment currently activated by the target device to the source base station as the first bandwidth segment (BWP) where it is currently working; if the target device is not currently working, the target device will send the bandwidth segment where it was last working to the source base station as the first bandwidth segment (BWP). The source base station is used to obtain the first bandwidth segment (BWP) where the target device is currently operating, and to control the target device to randomly access the target base station according to the first bandwidth segment (BWP). The source base station controls the target device to randomly access the target base station according to the first bandwidth segment BWP, including: The source base station sends the first bandwidth segment BWP to the target base station in order to determine whether there are resources corresponding to the first bandwidth segment BWP in the target base station; If it is determined that there are resources corresponding to the first bandwidth segment BWP in the target base station, the source base station instructs the target device to randomly access the target base station with the first bandwidth segment BWP as the initial bandwidth segment; After the target device randomly accesses the target base station with the first bandwidth segment BWP as the initial bandwidth segment, the target base station instructs the target device to activate the first bandwidth segment BWP.

8. An electronic device, characterized in that, include: Memory; as well as An electronic device coupled to the memory, the electronic device being used to execute the random access method as described in any one of claims 1-6 based on instructions stored in the memory.

9. A computer-readable storage medium having a program stored thereon that, when executed by a processor, implements the random access method as described in any one of claims 1-6.

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