Communication method and communication apparatus

Abstract

Provided in the present application are a communication method and a communication apparatus, which are applied to the technical field of communications. The communication method comprises: a first terminal selecting a first initial uplink BWP from among a plurality of initial uplink BWPs on the basis of a first association relationship and a first parameter that corresponds to the first terminal, and sending a random access request to a network device on the basis of the first initial uplink BWP, wherein the first association relationship is an association relationship between an initial uplink BWP and a first parameter, and the first parameter comprises a reference signal receiving power and / or a terminal type. The method is conducive to improving the success rate of random access.

Description

Communication methods and communication devices

[0001] This application claims priority to Chinese Patent Application No. 202411550643.3, filed on October 31, 2024, entitled "Communication Method and Communication Device", the entire contents of which are incorporated herein by reference. Technical Field

[0002] This application relates to the field of communication technology, and in particular to communication methods and communication devices. Background Technology

[0003] Network devices can configure the initial uplink bandwidth part (BWP) for random access for terminals via System Information Block (SIB) 1. The 5G (5G New Radio) standard already supports network devices configuring multiple initial uplink BWPs in SIB1 to provide terminals with different access bandwidths. Different initial uplink BWPs can employ different random access configurations to suit different communication conditions. With the development of technology and the increasing number of terminals, the success rate of random access may decrease. Improving the success rate of random access is a pressing technical problem that needs to be solved. Summary of the Invention

[0004] This application provides a communication method and a communication device, enabling the terminal to select a suitable uplink BWP and improve the success rate of random access.

[0005] Firstly, this application provides a communication method that can be executed by a first terminal. The first terminal (or terminal device) can refer to the first terminal itself, or a processor, module, chip, or chip system within the first terminal that implements the method. The method includes: the first terminal selecting a first initial uplink bandwidth (BWP) from multiple initial uplink part bandwidths (BWPs) based on a first association relationship and a first parameter corresponding to the first terminal, and sending a random access request to a network device based on the first initial uplink BWP; wherein the first association relationship is the association between the initial uplink BWP and the first parameter, which includes a reference signal received power and / or terminal type.

[0006] The initial uplink bandwidth (BWP) refers to the bandwidth available to the terminal when sending a random access request. The network device can configure multiple initial uplink bandwidths (BWPs) for the first terminal. Different initial uplink bandwidths can use different random access configurations to suit different communication conditions. The first initial uplink bandwidth (BWP) is the one selected by the first terminal from multiple initial uplink bandwidths to initiate random access. The reference signal received power (RSRP) can be obtained by measuring the reference signal sent by the network device. Optionally, the reference signal is the signal strength signal (SSB). The reference signal received power can be used to represent signal strength and / or signal quality. Further, optionally, the reference signal power can be represented by one or more of the following: reference signal receiving power (RSRP), reference signal receiving quality (RSRQ), received signal strength indication (RSSI), signal to interference plus noise ratio (SINR), and signal to noise ratio (SNR). Terminal type refers to the type classified according to different characteristics of the terminal. For example, the terminal type can be categorized based on the terminal's capabilities and / or energy-saving requirements.

[0007] By selecting the first initial uplink BWP through the first association relationship and the first parameters corresponding to the first terminal itself, it is beneficial to make the first initial uplink BWP selected by the first terminal more suitable, meet the current communication conditions of the first terminal, and improve the success rate of random access of the first terminal.

[0008] In conjunction with the method described in the first aspect, in one possible implementation, the method further includes: a first terminal receiving first information from a network device, the first information indicating a first association relationship. Alternatively, the first association relationship may be agreed upon by a protocol; or, the first association relationship may be agreed upon through negotiation between the first terminal and the network device, and this application does not limit this.

[0009] Secondly, this application provides a communication method that can be executed by a network device. The network device (or network apparatus) can refer to the network device itself, or to a processor, module, chip, or chip system within the network device that implements the method. The method includes: the network device sending first information; wherein the first information indicates a first association relationship, which is the association relationship between the initial uplink portion bandwidth (BWP) and first parameters, the first parameters including the synchronization signal block reference signal received power and / or the terminal type.

[0010] In one possible implementation, in conjunction with the method described in the first or second aspect, the first parameter includes a reference signal received power, and the first association includes an association between multiple initial uplink BWP groups and multiple reference signal received power ranges, wherein an initial uplink BWP group includes one or more initial uplink BWPs.

[0011] In conjunction with the method described in the first or second aspect, in one possible implementation, the first information further indicates power thresholds corresponding to multiple reference signal received power ranges. These power thresholds can be used to determine the power interval corresponding to each reference signal received power range. Optionally, the power thresholds can be represented by one or more of the following: RSRP threshold, RSRQ threshold, RSSI threshold, SINR threshold, and SNR threshold.

[0012] In conjunction with the method described in the first aspect, optionally, the method further includes: the first terminal measuring a reference signal from a network device to obtain a first received power value; wherein the first received power value is within a first received power range, multiple reference signal received power ranges include the first received power range, and the first initial uplink BWP belongs to the initial uplink BWP group corresponding to the first received power range. Based on this implementation, the first received power value can be used to reflect the current communication quality of the first terminal, and the initial uplink BWP group corresponding to the first received power range includes initial uplink BWPs applicable to terminals with received power within the first received power range. Therefore, the first terminal selecting an initial uplink BWP is beneficial to improving the success rate of random access for the first terminal.

[0013] In conjunction with the method described in the first aspect, optionally, after the first terminal sends a random access request based on the first initial uplink BWP, the method further includes: if the first terminal does not receive a random access response from the network device within a preset time range, the first terminal sends a random access request to the network device based on the second initial uplink BWP, wherein the second initial uplink BWP is an initial uplink BWP other than the first initial uplink BWP in the initial uplink BWP group corresponding to the first power range. The second initial uplink BWP selected by the first terminal based on this implementation method after random access fails helps to improve the success rate of random access.

[0014] In conjunction with the methods described in the first or second aspect, in one possible implementation, the first information further indicates the priority and / or load level of the initial uplink BWP. The priority of the initial uplink BWP can be used to indicate the degree of priority by which a terminal selects that initial uplink BWP to initiate random access; for example, a higher priority initial uplink BWP indicates a higher degree of priority for the terminal to select that initial uplink BWP to initiate random access, and a lower priority initial uplink BWP indicates a lower degree of priority for the terminal to select that initial uplink BWP to initiate random access. The load level of the initial uplink BWP can be used to reflect the number of times the preamble of that initial uplink BWP is detected by the network device, or the number of terminals that select that initial uplink BWP to initiate random access. For example, the more times a network device has detected a preamble on the RO within the initial uplink BWP over a period of time, the higher the load level of that initial uplink BWP, which corresponds to a larger number of terminals choosing that initial uplink BWP to initiate random access. Conversely, the fewer times a network device has detected a preamble on the RO within the initial uplink BWP over a period of time, the lower the load level of that initial uplink BWP, which corresponds to a smaller number of terminals choosing that initial uplink BWP to initiate random access. Optionally, to avoid conflicts with other terminals, terminals will preferentially select the initial uplink BWP with a lower load level.

[0015] In conjunction with the methods described in the first or second aspect, in one possible implementation, the first initial uplink BWP is either the highest priority initial uplink BWP in the initial uplink BWP group corresponding to the first received power range, or the initial uplink BWP with the lowest load level. Based on this implementation, the first terminal preferentially selects the initial uplink BWP with the highest priority, which helps improve the success rate of random access for the first terminal; conversely, the first terminal preferentially selects the initial uplink BWP with the lowest load level, which helps avoid conflicts between the first terminal and other terminals, thus improving the success rate of random access.

[0016] In one possible implementation, in conjunction with the method described in the first or second aspect, the first parameter is the terminal type, and the first association includes the association between multiple terminal types and multiple initial uplink BWP groups, wherein an initial uplink BWP group includes one or more initial uplink BWPs.

[0017] In conjunction with the methods described in the first or second aspect, in one possible implementation, the terminal type is related to the terminal's capabilities and / or its energy-saving requirements. Taking terminal capabilities as an example, they can be categorized based on the bandwidth supported by the terminal. For instance, a terminal supporting bandwidth above 20MHz can be classified as a normal UE, while a terminal not supporting bandwidth above 20MHz can be classified as a reduced capability UE (RedCap UE). Similarly, regarding energy-saving requirements, terminals with high energy-saving requirements can be classified as energy-saving terminals, while those with low energy-saving requirements can be classified as normal terminals.

[0018] In conjunction with the methods described in the first or second aspect, in one possible implementation, the terminal type of the first terminal is a first type, and the first type is included among multiple terminal types. The first initial uplink BWP is one of the initial uplink BWPs in the initial uplink BWP group corresponding to the first type. Based on this implementation, the first terminal preferentially selects an initial uplink BWP with higher priority, which is beneficial to improving the success rate of random access for the first terminal. Alternatively, the first terminal preferentially selects an initial uplink BWP with lower load level, which is beneficial to avoiding conflicts between the first terminal and other terminals, thereby improving the success rate of random access.

[0019] In conjunction with the method described in the first aspect, optionally, after the first terminal sends a random access request based on the first initial uplink BWP, the method further includes: if the first terminal does not receive a random access response from the network device within a preset time range, the first terminal sends a random access request to the network device based on a second initial uplink BWP, wherein the second initial uplink BWP is an initial uplink BWP other than the first initial uplink BWP in the initial uplink BWP group corresponding to the first type. The second initial uplink BWP selected by the first terminal based on this implementation method after a random access failure is beneficial to improving the success rate of random access.

[0020] In conjunction with the method described in the first or second aspect, in one possible implementation, the first initial uplink BWP is the highest priority initial uplink BWP in the initial uplink BWP group corresponding to the first type, or the initial uplink BWP with the lowest load level.

[0021] In conjunction with the methods described in the first or second aspect, in one possible implementation, the first information is carried on system information block 1 (SIB1) or master information block (MIB).

[0022] Thirdly, this application provides a communication method that can be executed by a first terminal. The first terminal (or terminal device) can refer to the first terminal itself, or a processor, module, chip, or chip system within the first terminal that implements the method. The method includes: the first terminal receiving third information from a network device, the third information indicating the priority and / or load level of each of a plurality of initial uplink BWPs; the first terminal selecting a first initial uplink BWP from the plurality of initial uplink BWPs based on the third information, and sending a random access request to the network device based on the first initial uplink BWP.

[0023] In this scenario, the first terminal can prioritize selecting an initial uplink BWP with a higher priority based on the third information, which helps improve the success rate of random access for the first terminal. Alternatively, the first terminal can prioritize selecting an initial uplink BWP with a lower load level based on the third information, which helps avoid conflicts between the first terminal and other terminals and improves the success rate of random access.

[0024] Fourthly, this application provides a communication method that can be executed by a network device. The network device (or network apparatus) can refer to the network device itself, or to a processor, module, chip, or chip system within the network device that implements the method. The method includes: the network device sending third information, which indicates the priority and / or load level of each of a plurality of initial uplink BWPs.

[0025] In conjunction with the methods described in the third or fourth aspect, in one possible implementation, the first initial uplink BWP is the initial uplink BWP with the highest priority among a plurality of initial uplink BWPs, or the initial uplink BWP with the lowest load level.

[0026] In conjunction with the methods described in the third or fourth aspect, in one possible implementation, the third information is carried on SIB1 or MIB.

[0027] In conjunction with the method described in the third aspect, in one possible implementation, if the first terminal does not receive a random access response from the network device within a preset time range, it sends a random access request to the network device based on the second initial uplink BWP. The second initial uplink BWP is the initial uplink BWP with the highest priority or lowest load level among multiple initial uplink BWPs, excluding the first initial uplink BWP.

[0028] Fifthly, embodiments of this application provide a communication device for executing the method in any possible implementation of any of the first to fourth aspects. The communication device includes a module for executing the method in any possible implementation of any of the first to fourth aspects.

[0029] Sixthly, embodiments of this application provide a communication device including a processing circuit for executing methods in any possible implementation of any of the first to fourth aspects. The processing circuit executes a program, and when the program is executed, the methods shown in any possible implementation of any of the first to fourth aspects are executed.

[0030] In one possible implementation, the communication device further includes a memory for storing the program.

[0031] In one possible implementation, the memory is located outside the aforementioned communication device.

[0032] In one possible implementation, the memory is located within the aforementioned communication device.

[0033] Furthermore, the processing circuitry and memory can be integrated into a single device; that is, the processing circuitry and memory can be combined. For example, the communication device can be a chip.

[0034] In one possible implementation, the communication device further includes a transceiver circuit for receiving information (or inputting information) or sending information (or outputting information).

[0035] In a seventh aspect, embodiments of this application provide a communication device, which includes a processing circuit and a transceiver circuit. The processing circuit can be a logic circuit, and the transceiver circuit can be an interface circuit. The logic circuit and the interface are coupled. The interface circuit is used to input and / or output information, and the logic circuit is used to execute a method of any possible implementation of any one of the first to fourth aspects.

[0036] Eighthly, this application provides a communication system including a communication device for performing the method described in the first aspect and a communication device for performing the method described in the second aspect. Alternatively, it includes a communication device for performing the method described in the third aspect and a communication device for performing the method described in the fourth aspect.

[0037] Ninthly, embodiments of this application provide a computer-readable storage medium for storing a computer program that, when run on a computer, causes the method shown in any possible implementation of any of the first to fourth aspects to be executed.

[0038] In a tenth aspect, embodiments of this application provide a computer program product that, when run on a computer, causes the method shown in any possible implementation of any of the first to fourth aspects to be executed. Attached Figure Description

[0039] Figure 1 is a schematic diagram of the architecture of a communication system provided in an embodiment of this application;

[0040] Figure 2 is a schematic diagram of the architecture of the communication system provided in an embodiment of this application;

[0041] Figure 3 is a flowchart illustrating a communication method provided in an embodiment of this application;

[0042] Figure 4 is a schematic diagram of the structure of an information cell provided in an embodiment of this application;

[0043] Figure 5 is a schematic diagram of the structure of an information cell provided in an embodiment of this application;

[0044] Figure 6 is a schematic diagram of the initial uplink BWP provided in an embodiment of this application;

[0045] Figure 7 is a schematic diagram of the structure of an information cell provided in an embodiment of this application;

[0046] Figure 8 is a flowchart illustrating a communication method provided in an embodiment of this application;

[0047] Figure 9 is a schematic diagram of the structure of a communication device provided in an embodiment of this application;

[0048] Figure 10 is a schematic diagram of the structure of a communication device provided in an embodiment of this application;

[0049] Figure 11 is a schematic diagram of the structure of a communication device provided in an embodiment of this application. Detailed Implementation

[0050] To facilitate understanding of the technical solution of this application, the application will be further described below with reference to the accompanying drawings.

[0051] The terms "first" and "second," etc., used in the specification, claims, and drawings of this application are used only to distinguish different objects and not to describe a specific order. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover a non-exclusive inclusion. For example, a process, method, system, product, or device that includes a series of steps or units is not limited to the listed steps or units, but may optionally include steps or units not listed, or may optionally include other steps or units inherent to these processes, methods, products, or devices.

[0052] The term "embodiment" as used herein means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0053] In this application, "at least one (item)" refers to one or more, "more than one" refers to two or more, "at least two (items)" refers to two or three or more, and "and / or" is used to describe the relationship between related objects, indicating that there can be three relationships. For example, "A and / or B" can mean: only A exists, only B exists, and both A and B exist simultaneously, where A and B can be singular or plural. "Or" indicates that there can be two relationships, such as only A exists and only B exists; when A and B are not mutually exclusive, it can also mean that there are three relationships, such as only A exists, only B exists, and both A and B exist simultaneously. The character " / " generally indicates that the preceding and following related objects are in an "or" relationship. "At least one (item) of the following" or similar expressions refer to any combination of these items. For example, at least one (item) of a, b, or c can mean: a, b, c, "a and b", "a and c", "b and c", or "a and b and c".

[0054] In this application, "send" and "receive" indicate the direction of signal transmission. For example, "send information to XX" can be understood as the destination of the information being XX, which can include direct transmission via the air interface or indirect transmission via the air interface from other units or modules. "Receive information from YY" can be understood as the source of the information being YY, which can include direct reception from YY via the air interface or indirect reception from YY via the air interface from other units or modules. "Send" can also be understood as the "output" of a chip interface, and "receive" can also be understood as the "input" of a chip interface. In other words, sending and receiving can occur between devices, such as between network devices and terminal devices, or within a device, such as between components, modules, chips, software modules, or hardware modules within the device via buses, traces, or interfaces.

[0055] The following describes the communication system involved in the embodiments of this application.

[0056] The technical solutions provided in this application can be applied to various communication systems, such as: 5th generation (5G) or new radio (NR) systems, long term evolution (LTE) systems, LTE frequency division duplex (FDD) systems, LTE time division duplex (TDD) systems, wireless local area network (WLAN) systems, satellite communication systems, future communication systems, or integrated systems of multiple systems. The technical solutions provided in this application can also be applied to device-to-device (D2D) communication, vehicle-to-everything (V2X) communication, machine-to-machine (M2M) communication, machine-type communication (MTC), and Internet of Things (IoT) communication systems or other communication systems.

[0057] The method provided in this application can be applied between two entities in a communication system, such as one entity sending information to or receiving information sent by the other entity. In a wireless communication system, communication devices are included, and these devices can communicate wirelessly using air interface resources. Air interface resources may include at least one of time-domain resources, frequency-domain resources, code resources, and spatial resources; this application does not limit this. For example, the aforementioned two entities may include a network device and a terminal device, or may include a chip that can be placed in a network device and a chip that can be placed in a terminal device, etc. Of course, as standards advance, other types of entities may emerge subsequently; this application does not limit this.

[0058] Figure 1 is a schematic diagram of the architecture of a communication system provided in an embodiment of this application. As shown in Figure 1, the communication system may include at least one network device and at least one terminal device, such as terminal device 1 to terminal device 4 in Figure 1. The terminal device and the network device can communicate via an air interface Uu link or via an NTN link, etc. For example, terminal device 3 and terminal device 4 can communicate via a D2D sidelink or other similar means. The form of the terminal device shown in Figure 1 is only an example. In a specific implementation, the terminal device may also include in-vehicle equipment or in-vehicle terminals in a vehicle network. This application embodiment does not limit the specific form of the terminal device when applied to a vehicle network or the Internet.

[0059] Figure 2 is a schematic diagram of the architecture of the communication system provided in an embodiment of this application. As shown in Figure 2, the scenarios of the communication system may include at least one of the following: point-to-point single connection between network devices and terminal devices, point-to-point dual connectivity (DC) between network devices and terminal devices, multi-hop single connection between network devices and terminal devices, or multi-hop dual connection between network devices and terminal devices.

[0060] Figure 1 exemplarily illustrates a network device and multiple terminal devices, and Figure 2 exemplarily illustrates single-connection and dual-connection. In specific implementations, the communication system may also include a greater number of network devices, and the coverage area of ​​each network device may include a greater or lesser number of terminal devices; this application embodiment does not limit this. The architectures shown in Figures 1 and 2 are merely examples and do not impose limitations on the network architecture applicable to this application. Any network architecture usable in this application is one where any network-side device in a cellular network communicates with or senses other devices.

[0061] The following provides a detailed description of terminal equipment and network equipment.

[0062] A terminal device is a device with wireless transceiver capabilities. It can communicate with access network equipment (or access devices, or network devices as described below) in a radio access network (RAN). Terminal devices can also be referred to as user equipment (UE), access terminal, terminal, subscriber unit, user station, mobile station, remote station, remote terminal, mobile device, user terminal, user agent, or user device, etc. In one possible implementation, the terminal device can be deployed on land, including indoors or outdoors, handheld or vehicle-mounted; or it can be deployed on water, including ships; or it can be deployed in the air, such as on airplanes, balloons, or satellites. In another possible implementation, the terminal device can be a handheld device with wireless communication capabilities, vehicle-mounted device, wearable device, sensor, terminal in the Internet of Things (IoT), terminal in the Internet of Vehicles (IoV), drone, or any form of terminal device in a 5G network or future network; this application does not limit this. In another possible implementation, the terminal device can also be a virtual reality (VR) terminal device, an augmented reality (AR) terminal device, a wireless terminal in industrial control, a wireless terminal in autonomous driving, a wireless terminal in telemedicine, a wireless terminal in a smart grid, a wireless terminal in a smart city, or a wireless terminal in a smart home, etc.

[0063] In this application embodiment, the device for implementing the functions of the terminal device can be the terminal device itself; it can also be a device capable of supporting the terminal device in implementing the functions, such as a chip system. The device can be installed in the terminal device or used in conjunction with the terminal device. In this application embodiment, the chip system can be composed of chips or can include chips and other discrete devices. For ease of description, when examples are mentioned below, the technical solutions provided in this application embodiment are described using the UE as an example to illustrate the device for implementing the functions of the terminal device.

[0064] A network device can be a device deployed in a wireless access network to provide wireless communication services to terminal devices. This network device can also be called an access network device, access equipment, or RAN device, etc. For example, a network device can be a next-generation node B (gNB), a next-generation evolved node B (ng-eNB), or a network device in future communications. A network device can be any device with wireless transceiver capabilities, including but not limited to the base stations mentioned above (including base stations deployed on satellites). This network device can also be a device with base station functionality in future communication systems. As an example, this network device can be an access node, wireless relay node, or wireless backhaul node in a wireless-fidelity (Wi-Fi) system. As another example, this network device can be a wireless controller in a cloud radio access network (CRAN) scenario. As yet another example, this network device can be a wearable device or vehicle-mounted device capable of providing wireless communication services. As yet another example, this network device can also be a small cell, a transmission reception point (TRP) (or a transmission point), etc. In systems using different wireless access technologies, the names of devices with network equipment functions may vary, and these will not be listed one by one in the embodiments of this application.

[0065] Network devices can be fixed or mobile. For example, a helicopter or drone can be configured to act as a mobile network device, and one or more cells can move according to the location of the mobile network device. In other examples, a helicopter or drone can be configured to be used as a device to communicate with another network device.

[0066] In some network device deployments, the network device may include centralized units (CUs) and distributed units (DUs). For example, some protocol layer functions of the network device may be centrally controlled by the CU, while the remaining part or all of the protocol layer functions may be distributed in the DU, which is centrally controlled by the CU. In other network device deployments, the CU may be divided into CU-control plane (CP) and CU-user plane (UP). In still other network device deployments, the network device may also be an open radio access network (ORAN) architecture. When the network device is an ORAN architecture, it may be a functional entity or module within the ORAN. For example, the network device may be one or more of CUs, DUs, or RUs. In an ORAN system, the CU may also be called an open (O)-CU, the DU may also be called an O-DU, the CU-CP may also be called an O-CU-CP, and the CU-UP may also be called an O-CU-UP, etc. The network device deployment methods listed here are merely examples. As standard technologies evolve, network devices may have other deployment forms, and this application does not limit these.

[0067] In some deployments, multiple RAN nodes collaborate to assist terminals in achieving wireless access, with different RAN nodes each implementing a portion of the access network's functions. For example, RAN nodes can be CUs, DUs, CU-CPs, CU-UPs, or RUs. CUs and DUs can be configured separately or included in the same network element, such as a building baseband unit (BBU). RUs can be included in radio frequency equipment or radio frequency units, such as remote radio units (RRUs), active antenna units (AAUs), or remote radio heads (RRHs).

[0068] RAN nodes can support one or more types of fronthaul interfaces, each corresponding to a DU and RU with different functions. If the fronthaul interface between the DU and RU is a common public radio interface (CPRI), the DU is configured to implement one or more baseband functions, and the RU is configured to implement one or more radio frequency functions. If the fronthaul interface between the DU and RU is another type of interface, relative to CPRI, some downlink and / or uplink baseband functions, such as, for downlink, precoding, digital beamforming (BF), or one or more of inverse fast fourier transform (IFFT) / cyclic prefix addition (CP), are moved from the DU to the RU; and for uplink, digital beamforming (BF), or one or more of fast fourier transform (FFT) / cyclic prefix removal (CP), are moved from the DU to the RU. In one possible implementation, the interface can be an enhanced common public radio interface (eCPRI). Under the eCPRI architecture, the segmentation between DU and RU differs, corresponding to different categories (Cat) of eCPRI, such as eCPRI Cat A, B, C, D, E, F.

[0069] Taking eCPRI Cat A as an example, for downlink transmission, layer mapping is used as the dividing line. The DU is configured to implement one or more functions preceding layer mapping (i.e., coding, rate matching, scrambling, modulation, and layer mapping itself), while other functions following layer mapping (e.g., resource element (RE) mapping, digital beamforming (BF), or one or more functions of IFFT / CP addition) are implemented in the RU. For uplink transmission, de-RE mapping is used as the dividing line. The DU is configured to implement one or more functions preceding de-mapping (i.e., decoding, rate matching de-matching, descrambling, demodulation, inverse discrete Fourier transform (IDFT), channel equalization, and one or more functions of de-RE mapping), while other functions following de-mapping (e.g., digital BF or FFT / CP removal) are implemented in the RU. It is understood that descriptions of the functions of the DU and RU corresponding to various types of eCPRI can be found in the eCPRI protocol and will not be elaborated upon here.

[0070] In one possible design, the processing unit in the BBU used to implement baseband functions is called the baseband high (BBH) unit, and the processing unit in the RRU / AAU / RRH used to implement baseband functions is called the baseband low (BBL) unit.

[0071] In different systems, CU (or CU-CP and CU-UP), DU, or RU may have different names, but those skilled in the art will understand their meaning. For example, in an ORAN system, CU can also be called O-CU (open CU), DU can also be called O-DU, CU-CP can also be called O-CU-CP, CU-UP can also be called O-CU-UP, and RU can also be called O-RU. Any of the units among CU (or CU-CP, CU-UP), DU, and RU in this application can be implemented through software modules, hardware modules, or a combination of software modules and hardware modules.

[0072] Network devices and / or terminal devices can be deployed on land, including indoors or outdoors, handheld or vehicle-mounted; they can also be deployed on water; and they can also be deployed in the air on airplanes, balloons, and satellites. This application does not limit the scenario in which the network devices and terminal devices are located. Furthermore, terminal devices and network devices can be hardware devices, or software functions running on dedicated hardware or general-purpose hardware, such as virtualization functions instantiated on a platform (e.g., a cloud platform), or entities that include dedicated or general-purpose hardware devices and software functions. This application does not limit the specific form of the terminal devices and network devices.

[0073] In this application embodiment, the device for implementing the function of the network device can be the network device itself; it can also be a device capable of supporting the network device in implementing the function, such as a chip system. The device can be installed in the network device or used in conjunction with the network device. For ease of description, when specific examples are mentioned below, the technical solution provided in this application embodiment will be described using a base station as an example.

[0074] The following explains the technical terms used in the embodiments of this application:

[0075] I. Initial Access

[0076] Initial access refers to the process of a terminal initially connecting to the network. For example, the initial access process of a terminal may include the following steps:

[0077] Step 1: The terminal receives a synchronization signal and physical broadcasting channel block (SSB) from the network device. The terminal can determine the time-frequency resource where system information block 1 (SIB1) is located based on the SSB. Optionally, the SSB can also be referred to as the synchronization signal and physical broadcasting channel block.

[0078] Step 2: The terminal receives SIB1 from the network device according to the time-frequency resources where SIB1 is located. SIB1 indicates the resource configuration that can be used by the terminal to initiate random access. The configuration of this random access resource includes the carrier position and bandwidth, the initial uplink BWP configuration, and the initial downlink BWP configuration, etc. The terminal can initiate random access according to the random access resource configuration. Among them, the initial uplink BWP configuration includes the configuration of random access resources, which can be used by the terminal device to send random access preambles, including the time-frequency resources of the random access channel occasion (RO) and the available random access preambles.

[0079] The following steps use a four-step random access method as an example:

[0080] Step 3: The terminal sends a random access message 1 (Msg1) to the network device according to the RO selected from the random access resource configuration. The content of Msg1 is the random access preamble selected by the terminal. The terminal sends the random access preamble to the network device to make a random access request. At the same time, the network device uses the random access preamble sent by the terminal device to estimate the transmission delay between itself and the terminal device so that the network device can calibrate the uplink timing.

[0081] Step 4: After receiving Msg1, the network device sends Random Access Message 2 (Msg2) to the terminal. Msg2 can also be called a Random Access Response, which may include one or more of the following information: time alignment (TA), uplink grant (UL grant), temporary cell radio network temporary identifier (TC-RNTI), power control, and resource indications for the terminal to send Random Access Message 3 (Msg3), etc. Msg2 may also include other information, which is not limited in this embodiment.

[0082] Step 5: After receiving Msg2, if the random access preamble indicated by the sequence number in Msg2 is the same as the random access preamble sent by the terminal to the network device in Step 3, then the terminal considers Msg2 to be a random access response for itself and sends Msg3 on the uplink channel resources indicated by Msg2. Msg3 may carry a unique user identifier.

[0083] Step 6: After receiving Msg3 from the terminal device, the network device returns a random access message 4 (Msg4) to the successfully connected terminal device. The network device includes the unique user identifier from Msg3 in Msg4 to identify the successfully connected terminal device, while other terminal devices that failed to connect will re-initiate random access. If the unique user identifier included in Msg4 is the same as the unique user identifier carried in Msg3 sent by the terminal in step 5, the terminal can consider the access successful.

[0084] The above main steps 3 to 6 use a four-step random access method as an example. To reduce access latency and signaling overhead, the terminal can also use a two-step random access method. For example, the two-step random access process can be seen in steps 3a to 4a below. Steps 3 to 6 above can also be replaced by steps 3a to 4a below.

[0085] Step 3a: The terminal sends a random access message A (MsgA) to the network device. MsgA includes a random access preamble and data.

[0086] Step 4a: The network device sends a random access message B (MsgB) to the terminal device.

[0087] Of course, the random access method described above is only an example. The terminal may also use other methods to initiate random access during the initial access process. This application embodiment does not limit this.

[0088] To improve the success rate of random access, this application proposes a communication method, as shown in Figure 3. This communication method includes steps 301 to 303, where step 301 is optional. The execution entities corresponding to the method shown in Figure 3 are a first terminal and a network device; alternatively, the execution entities can be components such as chips in the first terminal and the network device. Figure 3 illustrates the method using a first terminal and a network device as an example. This application does not limit the execution entities of the communication method. The first terminal can be the terminal described corresponding to the communication systems shown in Figures 1 and 2, and the network device can be the network device described corresponding to the communication systems shown in Figures 1 and 2. Wherein:

[0089] 301. The network device sends first information, which indicates a first association relationship, which is the association relationship between the initial uplink BWP and a first parameter, the first parameter including reference signal received power and / or terminal type.

[0090] Correspondingly, the first terminal receives the first information from the network device. Optionally, the network device may send the first information via broadcast; this embodiment does not limit the method by which the network device sends the first information. Optionally, the first information may be carried in the master information block (MIB) or SIB1.

[0091] The following mainly explains the first association relationship:

[0092] The first association refers to the association between the initial uplink BWP and the first parameter, which includes the reference signal received power and / or the terminal type. Alternatively, it can be understood as the first association including the association between the initial uplink BWP and the reference signal received power, and / or the association between the initial uplink BWP and the terminal type. Or, it can also be understood as the first association including the association between the initial uplink BWP's index and the reference signal received power, and / or the association between the initial uplink BWP's index and the terminal type.

[0093] For example, the initial uplink BWP refers to the bandwidth that a terminal can use when sending a random access request.

[0094] For example, the reference signal received power can be obtained by measuring a reference signal transmitted by a network device through a terminal. Optionally, the reference signal is an SSB (Special Signal Branch). For instance, the reference signal received power is the SSB received power, which refers to the received power obtained by measuring the SSB transmitted by the network device through a terminal. The reference signal received power can be used to represent signal strength and / or signal quality. Further optionally, the reference signal power can be represented by one or more of the following: reference signal receiving power (RSRP), reference signal receiving quality (RSRQ), received signal strength indication (RSSI), signal to interference plus noise ratio (SINR), or signal to noise ratio (SNR). Alternatively, the reference signal received power can also be described as one or more of RSRP, RSRQ, RSSI, SINR, or SNR.

[0095] For example, terminal type refers to the type classified according to different characteristics of the terminal. Optionally, the terminal type may be related to the terminal's capabilities and / or energy-saving requirements, or it can be understood that the terminal type can be classified based on the terminal's capabilities and / or energy-saving requirements. Taking terminal capabilities as an example, it can be classified according to the size of the bandwidth supported by the terminal. For example, a terminal that can support bandwidth above 20MHz can be classified as a normal terminal (normal UE) type, and a terminal that does not support bandwidth above 20MHz can be classified as a reduced capability UE (RedCap UE) type. Taking the terminal's energy-saving requirements as an example, terminals with high energy-saving requirements can be classified as energy-saving terminals, and terminals with low energy-saving requirements can be classified as normal terminals. Terminal types can also be classified based on other characteristics, such as the region where the terminal is located, or the terminal's priority, etc., which are not limited in this application. Optionally, the terminal type can be defined by a protocol or by the network device for the terminal, which is not limited in this embodiment of the application.

[0096] Optionally, the first parameter may also include other parameters, such as terminal identifier, the region where the terminal is located, or the priority of the terminal, etc. This application embodiment does not limit the first parameter.

[0097] Optionally, the association relationship may refer to a many-to-many correspondence (e.g., multiple BWPs correspond to multiple first parameters), or a one-to-many correspondence (e.g., one BWP corresponds to one first parameter), or a many-to-one correspondence (e.g., multiple BWPs correspond to one first parameter), or a one-to-one correspondence (e.g., one BWP corresponds to one first parameter). This application embodiment does not limit this.

[0098] In some examples, when the first parameter includes the reference signal received power, the first association includes the association between multiple reference signal received power ranges and multiple initial uplink BWP groups, where an initial uplink BWP group includes one or more initial uplink BWPs. Taking m initial uplink BWPs divided into n initial uplink BWP groups, with one initial uplink BWP group corresponding to one reference signal received power range as an example, the association between n reference signal received power ranges and n initial uplink BWP groups can be represented by Table 1 below:

[0099] Table 1

[0100] As shown in Table 1 above, initial uplink BWP group 1 includes initial uplink BWPs with BWP indices 1 and 2, and the reference signal received power range corresponding to initial uplink BWP group 1 is less than t1. Initial uplink BWP group 2 includes initial uplink BWPs with BWP indices 3, 4, 5, and 6, and the reference signal received power range corresponding to initial uplink BWP group 2 is greater than or equal to t1 and less than t2. The other initial BWP groups in Table 1 can be obtained similarly and will not be elaborated further. It should be understood that Table 1 is an example of the correlation between multiple reference signal received power ranges and multiple initial uplink BWP groups. The correlation between multiple reference signal received power ranges and multiple initial uplink BWP groups can also be expressed in other forms, and this embodiment does not limit this.

[0101] Optionally, the first information further indicates power thresholds corresponding to multiple reference signal received power ranges. The first terminal can determine the power interval corresponding to each reference signal received power range based on the power thresholds corresponding to the multiple reference signal received power ranges. Optionally, the power thresholds may include one or more of the maximum, minimum, or intermediate values ​​of the reference signal received power range. For example, referring to Table 1 above, the power thresholds corresponding to the multiple reference signal received power ranges include t1, t2, ..., tn. Further optionally, the power thresholds may be represented by one or more of RSRP thresholds, RSRQ thresholds, RSSI thresholds, SINR thresholds, and SNR thresholds.

[0102] Optionally, when the first information is carried in the UplinkConfigCommonSIB (UplinkConfigCommonSIB) information element in SIB1, as shown in Figure 4, the UplinkConfigCommonSIB information element includes the parameters BWPChooseThreshold and powerRangeBWPindex. The parameter BWPChooseThreshold indicates the power threshold corresponding to multiple reference signal received power ranges, and the parameter powerRangeBWPindex indicates the association between multiple reference signal received power ranges and multiple initial uplink BWP groups. Other parameters included in the UplinkConfigCommonSIB information element can be found in the definitions in the standard protocol and will not be repeated here. It should be understood that Figure 4 is an example, and this application embodiment does not limit the positions of the parameters BWPChooseThreshold and powerRangeBWPindex in the UplinkConfigCommonSIB information element, nor the positions of other parameters in the UplinkConfigCommonSIB information element.

[0103] In some examples, the first parameter includes the terminal type, and the first association includes the association between multiple terminal types and multiple initial uplink BWP groups. An initial uplink BWP group includes one or more initial uplink BWPs. Taking m initial uplink BWPs divided into n initial uplink BWP groups, with one initial uplink BWP group corresponding to one terminal type as an example, the association between n terminal types and n initial uplink BWP groups can be represented by the following Table 2:

[0104] Table 2

[0105] As shown in Table 1 above, initial uplink BWP group 1 includes initial uplink BWPs with BWP indices of 1 and 2, and the terminal type corresponding to initial uplink BWP group 1 is type 1. Initial uplink BWP group 2 includes initial uplink BWPs with BWP indices of 3, 4, 5, and 6, and the terminal type corresponding to initial uplink BWP group 2 is type 2. The other initial BWP groups in Table 2 can be obtained similarly and will not be elaborated further. It should be understood that Table 2 is an example of the association between multiple terminal types and multiple initial uplink BWP groups. The association between multiple terminal types and multiple initial uplink BWP groups can also be represented in other forms, and this embodiment of the application does not limit this.

[0106] Optionally, when the first information can be carried in the UplinkConfigCommonSIB (UplinkConfigCommonSIB) information element in SIB1, as shown in Figure 5, the UplinkConfigCommonSIB information element includes the parameter ueTypeUplinkBWPIndex. The parameter ueTypeUplinkBWPIndex is used to indicate the association between multiple terminal types and multiple initial uplink BWP groups. Other parameters included in the UplinkConfigCommonSIB information element can be found in the definitions in the standard protocol, and will not be repeated here. It should be understood that Figure 5 is an example, and this application embodiment does not limit the position of the parameter ueTypeUplinkBWPIndex in the UplinkConfigCommonSIB information element or the positions of other parameters in the UplinkConfigCommonSIB information element.

[0107] 302. The first terminal selects the first initial uplink BWP from multiple initial uplink BWPs based on the first association relationship and the first parameters corresponding to the first terminal.

[0108] Here, the first initial uplink BWP is the initial uplink BWP selected by the first terminal from multiple initial uplink BWPs for initiating random access. Optionally, initiating random access can also be described as sending a random access request. The multiple initial uplink BWPs are candidate initial uplink BWPs configured by the network device for the first terminal that can be used to initiate random access. Optionally, different initial uplink BWPs among the multiple initial uplink BWPs can adopt different random access configurations; for example, different initial uplink BWPs can use different preamble types, or the transmit power indications can be different.

[0109] For example, as shown in Figure 6, there are four initial uplink BWPs. The first terminal can select one of the four initial uplink BWPs and the RO associated with that initial uplink BWP to initiate random access. For example, in Figure 6, the first terminal can select initial uplink BWP3 and the RO3 associated with initial uplink BWP3 to initiate random access.

[0110] By selecting the first initial uplink BWP through the first association relationship and the first parameters corresponding to the first terminal itself, it is beneficial to make the first initial uplink BWP selected by the first terminal more suitable, meet the current communication conditions of the first terminal, and improve the success rate of random access of the first terminal.

[0111] It should also be noted that the number of initial uplink BWPs selected by the first terminal can be one or more. This application embodiment mainly uses one as an example for introduction. The same principle applies to multiple cases, and this application embodiment will not elaborate further.

[0112] The following describes how the first terminal selects the first initial uplink BWP.

[0113] In some possible implementations, the first terminal may select a first initial uplink BWP from the initial uplink BWP group associated with its corresponding first parameter. For example, this could include the following:

[0114] Example 1: When the first parameter includes the reference signal received power, the first association includes the association between multiple reference signal received power ranges and multiple initial uplink BWP groups. The first terminal can measure the reference signal sent by the network device to obtain a first received power value, wherein the first received power value is within a first received power range, and the multiple reference signal received power ranges include the first received power range. The first terminal can select a first initial uplink BWP from the initial uplink BWP group corresponding to the first received power range, or it can be understood that the first initial uplink BWP selected by the first terminal belongs to the initial uplink BWP group associated with the first received power range. Based on the selection method described in Example 1, the first received power value can be used to reflect the current communication quality of the first terminal, and the initial uplink BWP group corresponding to the first received power range includes initial uplink BWPs applicable to terminals with received power within the first received power range. Therefore, the first terminal's selection of an initial uplink BWP is beneficial to improving the success rate of random access.

[0115] Taking Table 1 above as an example, assuming that the first received power value measured by the first terminal is greater than t1 and less than t2, and is within the reference signal received power range corresponding to the initial uplink BWP group 2, the first terminal can select the first initial uplink BWP from the initial uplink BWPs with BWP indices of 3, 4, 5 and 6 included in the initial uplink BWP group 2. For example, the initial uplink BWP with BWP index of 3 can be selected to initiate random access.

[0116] Example 2: When the first parameter includes a terminal type, the first association includes the association between multiple terminal types and multiple initial uplink BWP groups. The terminal type of the first terminal is a first type, and the first type is included among the multiple terminal types. The first terminal can select a first initial uplink BWP from the initial uplink BWP group corresponding to the first type. Alternatively, it can be understood that the first initial uplink BWP selected by the first terminal belongs to the initial uplink BWP group associated with the first type. Based on the selection method described in Example 2, the first type can be used to reflect the characteristics of the first terminal (e.g., the capabilities or energy-saving requirements of the first terminal). The initial uplink BWP group corresponding to the first type includes the initial uplink BWPs applicable to terminals of the first type. Therefore, selecting an initial uplink BWP by the first terminal helps improve the success rate of random access for the first terminal.

[0117] Using Table 2 above as an example, assuming the first terminal is of type 1 and is associated with initial uplink BWP group 1, the first terminal can select the first initial uplink BWP from the initial uplink BWPs with BWP indices 1 and 2 included in initial uplink BWP group 1. For example, the initial uplink BWP with BWP index 1 can be selected to initiate random access.

[0118] Example 3: The first parameter includes both the terminal type and the reference signal received power. The first association includes the association between multiple reference signal received power ranges and multiple initial uplink BWP groups, as well as the association between multiple terminal types and multiple initial uplink BWP groups. Assume that the first terminal measures the reference signal transmitted by the network device to obtain a first received power value, which is within the first received power range, and the terminal type of the first terminal is type 1. Optionally, the first terminal can determine at least one initial uplink BWP associated with the first type from the initial uplink BWP groups corresponding to the first received power range, and determine the first initial uplink BWP from the at least one initial BWP associated with the first type; or, the first terminal can determine at least one initial uplink BWP associated with the first received power range from the initial uplink BWP groups corresponding to the first type, and determine the first initial uplink BWP from the at least one initial BWP associated with the first received power range.

[0119] Optionally, the first information may also indicate the priority and / or load level of the initial uplink BWP. For example, the first information may indicate the priority and / or load level of each of the plurality of initial uplink BWPs.

[0120] For example, the priority of the initial uplink BWP can be used to indicate the degree of priority for the terminal to select that initial uplink BWP to initiate random access. For instance, the higher the priority of the initial uplink BWP, the higher the priority for the terminal to select that initial uplink BWP to initiate random access; the lower the priority of the initial uplink BWP, the lower the priority for the terminal to select that initial uplink BWP to initiate random access. For example, if the priority of initial uplink BWP1 is higher than the priority of initial uplink BWP2, the terminal will preferentially select initial uplink BWP1 to initiate random access.

[0121] For example, the load level of the initial uplink BWP can be used to reflect the number of times the network device detects the preamble of the initial uplink BWP, or the number of terminals that choose the initial uplink BWP to initiate random access. For instance, the more times the network device detects the preamble on the RO within the initial uplink BWP in a past period, the higher the load level of the initial uplink BWP, corresponding to a larger number of terminals choosing the initial uplink BWP to initiate random access; conversely, the fewer times the network device detects the preamble on the RO within the initial uplink BWP in a past period, the lower the load level of the initial uplink BWP, corresponding to a smaller number of terminals choosing the initial uplink BWP to initiate random access. Optionally, the network device can use the number of times the preamble is detected on the RO within the initial uplink BWP in a past period as a measure of load level. Optionally, to avoid conflicts with other terminals, terminals will preferentially choose the initial uplink BWP with a lower load level. For example, if the load level of initial uplink BWP1 is higher than the priority of initial uplink BWP2, the terminal will preferentially choose initial uplink BWP2 to initiate random access.

[0122] Further optionally, if the first information can be carried in the UplinkConfigCommonSIB cell in SIB1, as shown in Figure 7, the parameters priority and load can be added to this UplinkConfigCommonSIB cell. The parameter priority is used to represent the priority of the initial uplink BWP, and the parameter load is used to represent the load level of the initial uplink BWP. Other parameters included in the UplinkConfigCommonSIB cell can be found in the definitions in the standard protocol, and will not be repeated here. It should be understood that Figure 6 is an example, and this application embodiment does not limit the position of the parameters priority and load in the UplinkConfigCommonSIB cell or the other parameters included in the UplinkConfigCommonSIB cell. Optionally, the UplinkConfigCommonSIB cell may also include only one of the parameters priority and load.

[0123] In conjunction with Example 1 above, the first terminal can select a first initial uplink BWP from the initial uplink BWP group corresponding to the first received power range. When the first information indicates the priority and / or load level of the initial uplink BWP, the first initial uplink BWP selected by the first terminal is the initial uplink BWP with the highest priority in the initial uplink BWP group corresponding to the first received power range, and / or the initial uplink BWP with the lowest load level in the initial uplink BWP group corresponding to the first received power range.

[0124] Based on Example 2 above, the first terminal can select the first initial uplink BWP from the initial uplink BWP group corresponding to the first type. When the first information indicates the priority and / or load level of the initial uplink BWP, the first initial uplink BWP selected by the first terminal is the initial uplink BWP with the highest priority in the initial uplink BWP group corresponding to the first type, and / or the initial uplink BWP with the lowest load level in the initial uplink BWP group corresponding to the first type.

[0125] In some possible implementations, the first association and the first parameter corresponding to the first terminal can be used as a reference, and the first terminal can independently decide which initial uplink BWP to select. For example, the first parameter corresponding to the first terminal is associated with a third initial uplink BWP, and the first terminal can select the third initial uplink BWP to initiate random access, that is, the first initial uplink BWP is the third initial uplink BWP, or the first terminal can also refer to the third initial uplink BWP to select other initial uplink BWPs, that is, the first initial uplink BWP is an initial uplink BWP other than the third initial uplink BWP.

[0126] Optionally, the first association relationship may be configured by the network device, such as in step 301; or the first association relationship may be agreed upon by an agreement; or the first association relationship may be agreed upon by the first terminal and the network device through negotiation, and this application does not limit this.

[0127] 303. The first terminal sends a random access request to the network device based on the first initial uplink BWP.

[0128] Optionally, the network device receives a random access request from the first terminal via the first initial uplink BWP.

[0129] The random access request is used to request access to the network device. Optionally, the random access request can be random access message 1 (Msg1) in a four-step random access process, or it can be random access message A (MsgA) in a two-step random access process.

[0130] In some possible implementations, after the network device receives a random access request from the first terminal, the network device can send a random access response to the first terminal via a first initial downlink BWP. Optionally, the random access response can be random access message 2 (Msg2) in a four-step random access mechanism, or it can be random access message B (MsgB) in a two-step random access mechanism.

[0131] In some examples, the network device can configure one or more initial downlink BWPs for the first terminal. For instance, the network device sends second information, and the first terminal receives the second information from the network device. This second information indicates the one or more initial downlink BWPs, which include the first initial downlink BWP.

[0132] Optionally, the second information may explicitly or implicitly indicate the one or more initial downlink BWPs. For example, when the second information is explicitly indicated, it may indicate the index of the initial downlink BWP associated with each of the multiple initial uplink BWPs. For example, when the second information is implicitly indicated, it may indicate the association between the one or more initial downlink BWPs and the multiple initial uplink BWPs. Further optionally, the center frequency of each initial uplink BWP may be aligned with or not aligned with its associated initial downlink BWP.

[0133] Optionally, this second information can be carried in MIB or SIB1.

[0134] It should be understood that network devices may also use other methods to configure the initial downlink BWP, and this application embodiment does not limit this.

[0135] In some possible implementations, after the first terminal sends a random access request to the network device based on the first initial uplink BWP, if it does not receive a random access response from the network device within a preset time range, it sends a random access request to the network device based on the second initial uplink BWP. The second initial uplink BWP is an initial uplink BWP other than the first initial uplink BWP in the initial uplink BWP group corresponding to the first parameter of the first terminal.

[0136] For example, the random access request sent by the first terminal based on the first initial uplink BWP can be called the first random access request, and the random access request sent based on the second initial uplink BWP can be called the second random access request. The above implementation can be described as follows: if no random access response from the network device for the first random access request is received within a preset time range, the second random access request is sent to the network device based on the second initial uplink BWP.

[0137] The preset time range refers to the time period used to receive the first random access response message. Optionally, this preset time range can be customized by the first terminal, configured by the network device, predefined by the protocol, or determined through negotiation between the first terminal and the network device; this embodiment does not limit this. Optionally, if the first terminal does not receive a random access response from the network device within the preset time range, it can be described as a random access failure of the first terminal.

[0138] Optionally, when the first information indicates the priority and / or load level of each of the plurality of initial uplink BWPs, the second initial uplink BWP is the initial uplink BWP with the highest priority or lowest load level other than the first initial uplink BWP in the initial uplink BWP group corresponding to the first parameter of the first terminal.

[0139] Referring to Example 1 above, when the first parameter is the reference signal received power, the first initial uplink BWP is a BWP in the initial uplink BWP group corresponding to the first received power range. If the first terminal does not receive a random access response within a preset time range, it can select a second initial uplink BWP from the initial uplink BWP group corresponding to the first received power range. This second initial uplink BWP is any other initial uplink BWP in the initial uplink BWP group corresponding to the first received power range besides the first initial uplink BWP. Optionally, this second initial uplink BWP is the initial uplink BWP with the highest priority or lowest load level in the initial uplink BWP group corresponding to the first received power range, excluding the first initial uplink BWP. After a random access failure, the second initial uplink BWP selected by the first terminal based on this implementation method helps improve the success rate of random access.

[0140] Referring to Example 2 above, when the first parameter is the terminal type, the first initial uplink BWP is the BWP in the initial uplink BWP group corresponding to the first type. If the first terminal does not receive a random access response within a preset time range, it can select a second initial uplink BWP from the initial uplink BWP group corresponding to the first type. This second initial uplink BWP is any initial uplink BWP in the initial uplink BWP group corresponding to the first type other than the first initial uplink BWP. Optionally, this second initial uplink BWP is the initial uplink BWP with the highest priority or lowest load level in the initial uplink BWP group corresponding to the first received power range, excluding the first initial uplink BWP. After a random access failure, the second initial uplink BWP selected by the first terminal based on this implementation method helps improve the success rate of random access.

[0141] To improve the success rate of random access, this application proposes a communication method, as shown in Figure 8. This communication method includes steps 801 to 803, where step 801 is optional. The execution entities corresponding to the method shown in Figure 8 are a first terminal and a network device; alternatively, the execution entities can be components such as chips in the first terminal and the network device. Figure 8 illustrates the method using a first terminal and a network device as an example. This application does not limit the execution entities of the communication method. The first terminal can be the terminal described in the communication systems shown in Figures 1 and 2, and the network device can be the network device described in the communication systems shown in Figures 1 and 2. Wherein:

[0142] 801. The network device sends third information, which is used to indicate the priority and / or load level of each of the multiple initial uplink BWPs.

[0143] Correspondingly, the first terminal receives the third information from the network device. Optionally, the network device may send the third information via broadcast; this embodiment does not limit the method by which the network device sends the third information. Optionally, the third information may be carried on SIB1 or MIB.

[0144] The definitions of the initial uplink BWP, its priority, and its load level are the same as those described in the embodiment corresponding to Figure 3, and will not be repeated here.

[0145] 802. The first terminal selects the first initial uplink BWP from multiple initial uplink BWPs based on the third information.

[0146] Based on this implementation, the first terminal can prioritize the selection of the initial uplink BWP with higher priority according to the third information, which is beneficial to improving the success rate of random access for the first terminal. Alternatively, the first terminal can prioritize the selection of the initial uplink BWP with lower load level according to the third information, which is beneficial to avoid conflicts between the first terminal and other terminals and improve the success rate of random access.

[0147] In some possible implementations, the first initial uplink BWP is either the highest priority initial uplink BWP among multiple initial uplink BWPs, or the initial uplink BWP with the lowest load level.

[0148] In some possible implementations, the first association relationship and the first parameter corresponding to the first terminal can be used as a reference, and the first terminal can independently decide which initial uplink BWP to select. For example, the third initial uplink BWP is the highest priority initial uplink BWP, and the first terminal can select the third initial uplink BWP to initiate random access, that is, the first initial uplink BWP is the third initial uplink BWP, or the first terminal can also refer to the third initial uplink BWP to select other initial uplink BWPs, that is, the first initial uplink BWP is an initial uplink BWP other than the third initial uplink BWP.

[0149] Optionally, the priority and / or load level of the initial uplink BWP can be configured by the network device, such as in step 801; or the priority and / or load level of the initial uplink BWP can be agreed upon by the protocol; or the priority and / or load level of the initial uplink BWP can be agreed upon by the first terminal and the network device through negotiation, and this application does not limit this.

[0150] 803. The first terminal sends a random access request to the network device based on the first initial uplink BWP.

[0151] Optionally, the network device receives a random access request from the first terminal via the first initial uplink BWP.

[0152] The definition of the random access request is the same as that described in the previous embodiments, and will not be repeated here.

[0153] In some possible implementations, after the first terminal sends a random access request based on a first initial uplink BWP, the method further includes: if no random access response is received from the network device within a preset time range, then sending a random access request to the network device based on a second initial uplink BWP, wherein the second initial uplink BWP is the initial uplink BWP with the highest priority or lowest load level among multiple initial uplink BWPs excluding the first initial uplink BWP. After a random access failure, the second initial uplink BWP selected by the first terminal based on this implementation method helps to improve the success rate of random access.

[0154] It should also be noted that the embodiments described in Figure 8 can be combined with the embodiments described in Figure 3 above.

[0155] The following describes the communication device provided in the embodiments of this application.

[0156] This application divides the communication device into functional modules according to the above-described method embodiments. For example, each function can be divided into its own functional modules, or two or more functions can be integrated into one processing module. The integrated modules can be implemented in hardware or as software functional modules. It should be noted that the module division in this application is illustrative and represents only one logical functional division; in actual implementation, other division methods may be used. The communication device of this application embodiment will be described in detail below with reference to Figures 9 to 11.

[0157] Figure 9 is a schematic diagram of a communication device provided in an embodiment of this application. As shown in Figure 9, the communication device includes a processing module 901 and a transceiver module 902. The transceiver module 902 can implement corresponding communication functions, and the processing module 901 is used to implement corresponding processing functions. For example, the transceiver module 902 can also be called an interface, a communication interface, or a communication module, etc.

[0158] In this embodiment, the communication device can be used to perform the actions performed by the first terminal in the method embodiment described above. In this case, the first terminal can be the first terminal itself or a chip or functional module configurable within the first terminal. The transceiver module 902 is used to perform transceiver-related operations of the first terminal in the method embodiment described above, and the processing module 901 is used to perform processing-related operations of the first terminal in the method embodiment described above.

[0159] For example, processing module 901 can be used to select a first initial uplink BWP from multiple initial uplink partial bandwidth BWPs based on a first association relationship and a first parameter corresponding to the first terminal. The first association relationship is the association relationship between the initial uplink BWP and the first parameter, which includes reference signal received power and / or terminal type. Transceiver module 902 can be used to send a random access request to the network device based on the first initial uplink BWP.

[0160] For example, the transceiver module 902 can be used to receive third information from the network device, the third information being used to indicate the priority and / or load level of each of the multiple initial uplink BWPs; the processing module 901 can be used to select a first initial uplink BWP from the multiple initial uplink BWPs based on the third information; the transceiver module 902 can also be used to send a random access request to the network device based on the first initial uplink BWP.

[0161] Optionally, in the above embodiments, the communication device may further include a storage module, which can be used to store instructions and / or data. The processing module 901 can read the instructions and / or data in the storage module so that the communication device can implement the aforementioned method embodiments.

[0162] The specific descriptions of the transceiver module and processing module shown in the above embodiments are merely examples. For the specific functions or execution steps of the transceiver module and processing module, please refer to the above method embodiments, which will not be described in detail here.

[0163] Reusing Figure 9, in this embodiment of the application, the communication device can be used to perform the actions performed by the first network device in the above method embodiment. In this case, the first network device can be the first network device itself or a chip or functional module configurable within the first network device. The transceiver module 902 is used to perform transceiver-related operations of the first network device in the above method embodiment, and the processing module 901 is used to perform processing-related operations of the first network device in the above method embodiment.

[0164] For example, the transceiver module 902 can be used to send first information, the first information indicating a first association relationship, the first association relationship being the association relationship between the initial uplink portion bandwidth (BWP) and a first parameter, the first parameter including reference signal received power and / or terminal type.

[0165] For example, the transceiver module 902 can be used to carry third information on the system information block SIB1 or the main information block MIB.

[0166] Optionally, in the above embodiments, the communication device may further include a storage module, which can be used to store instructions and / or data. The processing module 901 can read the instructions and / or data in the storage module so that the communication device can implement the aforementioned method embodiments.

[0167] The specific descriptions of the transceiver module and processing module shown in the above embodiments are merely examples. For the specific functions or execution steps of the transceiver module and processing module, please refer to the above method embodiments, which will not be described in detail here.

[0168] The communication device of this application embodiment has been described above. The following describes possible product forms of the communication device. Any product possessing the functions of the communication device described in FIG9 above falls within the protection scope of this application embodiment. The following description is merely illustrative and does not limit the product form of the communication device of this application embodiment to this.

[0169] In one possible implementation, in the communication device shown in FIG9, the processing module 901 can be one or more processing circuits, and the transceiver module 902 can be a transceiver circuit. Alternatively, the transceiver module 902 can also be a transmitting module and a receiving module. The transmitting module can be a transmitting circuit, and the receiving module can be a receiving circuit, which are integrated into one device, such as a transceiver circuit. In the embodiments of this application, the processing circuit and the transceiver circuit can be coupled, etc. The connection method of the processing circuit and the transceiver circuit is not limited in the embodiments of this application. In the process of performing the above method, the process of sending information in the above method can be the process of the processing circuit outputting the above information. When outputting the above information, the processing circuit outputs the above information to the transceiver circuit so that the transceiver circuit can transmit (or output). After the above information is output by the processing circuit, it may need to undergo other processing before reaching the transceiver circuit. Similarly, the process of receiving information in the above method can be the process of the processing circuit receiving the input above information. When the processing circuit receives the input information, the transceiver circuit receives the above information and inputs it into the processing circuit. Furthermore, after the transceiver circuit receives the aforementioned information, the information may need to undergo further processing before being input into the processing circuit.

[0170] Figure 10 is a schematic diagram of a communication device provided in an embodiment of this application. As shown in Figure 10, the communication device 100 includes one or more processing circuits 1020 and transceiver circuits 1010.

[0171] In some embodiments of this application, the communication device can be used to execute the steps, methods, or functions performed by the first terminal described above. For example, the processing circuit 1020 can be used to execute the functions or steps implemented by the processing module 901 shown in FIG. 9, and the transceiver circuit 1010 can be used to execute the functions or steps implemented by the transceiver module 902 shown in FIG. 9. For a detailed description of the processing circuit 1020 and the transceiver circuit 1010, please refer to FIG. 9 or the method embodiments shown above, which will not be described in detail here.

[0172] In other embodiments of this application, the communication device is used to perform the steps, methods, or functions performed by the first network device described above. For example, the processing circuit 1020 can be used to perform the functions or steps implemented by the processing module 901 shown in FIG. 9, and the transceiver circuit 1010 can be used to perform the functions or steps implemented by the transceiver module 902 shown in FIG. 9. For a detailed description of the processing circuit 1020 and the transceiver circuit 1010, please refer to FIG. 9 or the method embodiments shown above, which will not be described in detail here.

[0173] For example, the processing circuitry may be one or more processors, or all or part of the circuitry within one or more processors. The transceiver circuitry may be a transceiver, an input / output circuit, or an interface circuit, etc.

[0174] For example, in various implementations of the communication device shown in FIG10, the transceiver circuit may include a receiver for performing a receiving function (or operation) and a transmitter for performing a transmitting function (or operation). The transceiver circuit is also used to communicate with other devices / communication devices via a transmission medium.

[0175] Optionally, the communication device 100 may further include one or more memories 1030 for storing program instructions and / or data. The memories 1030 are coupled to the processing circuitry 1020. The coupling in this embodiment is an indirect coupling or communication connection between devices, units, or modules, and can be electrical, mechanical, or other forms, used for information exchange between devices, units, or modules. The processing circuitry 1020 may operate in conjunction with the memories 1030. The processing circuitry 1020 may execute the program instructions stored in the memories 1030. Optionally, at least one of the aforementioned memories may be included in the processing circuitry.

[0176] This application embodiment does not limit the specific connection medium between the transceiver circuit 1010, processing circuit 1020, and memory 1030. In this application embodiment, the memory 1030, processing circuit 1020, and transceiver circuit 1010 are connected via a bus 1040 in Figure 10. The bus is represented by a thick line in Figure 10. The connection methods between other components are only for illustrative purposes and are not intended to be limiting. The bus can be divided into address bus, data bus, control bus, etc. For ease of illustration, only one thick line is used in Figure 10, but this does not mean that there is only one bus or one type of bus.

[0177] In the embodiments of this application, the processing circuit may be a general-purpose processing circuit, a digital signal processing circuit, an application-specific integrated circuit (ASIC), a field-programmable gate array (FPGA) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc., and can implement or execute the various methods, steps, and logic block diagrams in the embodiments of this application. The general-purpose processing circuit may be a microprocessor circuit or any conventional processing circuit, etc. The steps of the methods in conjunction with the embodiments of this application can be directly manifested as the execution of the hardware processing circuit, or the execution of the steps by combining hardware and software modules in the processing circuit, etc.

[0178] In this application embodiment, the memory may include, but is not limited to, non-volatile memory such as hard disk drive (HDD) or solid-state drive (SSD), random access memory (RAM), erasable programmable read-only memory (EPROM), read-only memory (ROM), or compact disc read-only memory (CD-ROM), etc. Memory is any storage medium capable of carrying or storing program code in the form of instructions or data structures, and capable of being read and / or written by a computer (such as the communication device shown in this application), but is not limited to these. The memory in this application embodiment may also be a circuit or any other communication device capable of implementing storage functions, used to store program instructions and / or data.

[0179] For example, the processing circuit 1020 is mainly used to process communication protocols and communication data, control the entire device, execute software programs, and process the data of the software programs. The memory 1030 is mainly used to store software programs and data. The transceiver circuit 1010 may include a control circuit and an antenna. The control circuit is mainly used for converting baseband signals to radio frequency signals and processing radio frequency signals. The antenna is mainly used for transmitting and receiving radio frequency signals in the form of electromagnetic waves. Input / output devices, such as touch screens, displays, and keyboards, are mainly used to receive user input data and output data to the user.

[0180] When the communication device is powered on, the processing circuit 1020 can read the software program in the memory 1030, interpret and execute the instructions of the software program, and process the data of the software program. When data needs to be transmitted wirelessly, the processing circuit 1020 performs baseband processing on the data to be transmitted and outputs the baseband signal to the radio frequency (RF) circuit. The RF circuit then performs RF processing on the baseband signal and transmits the RF signal outward in the form of electromagnetic waves through the antenna. When data is sent to the communication device, the RF circuit receives the RF signal through the antenna, converts the RF signal into a baseband signal, and outputs the baseband signal to the processing circuit 1020. The processing circuit 1020 converts the baseband signal into data and processes the data.

[0181] In another implementation, the radio frequency circuit and antenna can be set up independently of the processing circuit that performs baseband processing. For example, in a distributed scenario, the radio frequency circuit and antenna can be arranged in a remote manner, independent of the communication device.

[0182] The communication device shown in this application embodiment may have more components than those in Figure 10, and this application embodiment does not limit this. The methods performed by the processing circuit and transceiver circuit shown above are only examples, and the specific steps performed by the processing circuit and transceiver circuit can be referred to the methods described above.

[0183] In another possible implementation, in the communication device shown in Figure 9, the processing module 901 can be one or more logic circuits, and the transceiver module 902 can be an input / output interface, or a communication interface, or an interface circuit, or an interface, etc. Alternatively, the transceiver module 902 can also be a transmitting module and a receiving module. The transmitting module can be an output interface, and the receiving module can be an input interface. The transmitting module and the receiving module are integrated into one module, such as an input / output interface.

[0184] Figure 11 is a schematic diagram of a communication device provided in an embodiment of this application. As shown in Figure 11, the communication device includes a logic circuit 1101 and an interface circuit 1102. That is, the processing module 901 can be implemented using the logic circuit 1101, and the transceiver module 902 can be implemented using the interface circuit 1102. The logic circuit 1101 can be a chip, a processing circuit, an integrated circuit, or a system-on-a-chip (SoC) chip, etc., and the interface circuit 1102 can be a communication interface, an input / output interface, pins, etc. For example, Figure 11 illustrates the communication device as a chip, which includes the logic circuit 1101 and the interface circuit 1102.

[0185] In this embodiment, the logic circuit and the interface can also be coupled to each other. The specific connection method of the logic circuit and the interface is not limited in this embodiment. For example, the logic circuit 1101 can be used to execute the functions or steps implemented by the processing module 901 shown in FIG. 9, and the interface circuit 1102 can be used to execute the functions or steps implemented by the transceiver module 902 shown in FIG. 9. For a detailed description of the logic circuit 1101 and the interface circuit 1102, please refer to FIG. 9 or the method embodiment shown above, which will not be detailed here.

[0186] The communication device shown in the embodiments of this application can implement the method provided in the embodiments of this application in hardware form, or it can implement the method provided in the embodiments of this application in software form, etc., and the embodiments of this application do not limit it in this way.

[0187] This application also provides a communication system, which includes a first terminal and a first network device, which can be used to perform the methods in any of the foregoing embodiments.

[0188] In addition, this application also provides a computer program for implementing the operations and / or processes performed by various communication devices in the method provided in this application.

[0189] This application also provides a computer-readable storage medium storing computer code that, when executed on a computer, causes the computer to perform the operations and / or processes performed by various communication devices in the methods provided in this application.

[0190] This application also provides a computer program product comprising computer code or a computer program that, when run on a computer, causes the operations and / or processes performed by various entities in the method provided in this application to be executed.

[0191] In the embodiments provided in this application, it should be understood that the disclosed systems, apparatuses, and methods can be implemented in other ways. For example, the communication apparatus embodiments described above are merely illustrative. For instance, the division of modules is only a logical functional division, and in actual implementation, there may be other division methods. For example, multiple modules or components may be combined or integrated into another system, or some features may be ignored or not executed. In addition, the mutual coupling or direct coupling or communication connection shown or discussed may be indirect coupling or communication connection through some interfaces, devices, or modules, or it may be an electrical, mechanical, or other form of connection.

[0192] The modules described as separate components may or may not be physically separate. The components shown as modules may or may not be physical modules; that is, they may be located in one place or distributed across multiple network modules. Some or all of the modules can be selected according to actual needs to achieve the technical effects of the solutions provided in the embodiments of this application.

[0193] Furthermore, the functional modules in the various embodiments of this application can be integrated into one processing module, or each module can exist physically separately, or two or more modules can be integrated into one module. The integrated modules described above can be implemented in hardware or as software functional modules.

[0194] If the integrated module is implemented as a software functional module and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of this application, in essence, or the part that contributes to the prior art, or all or part of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a readable storage medium and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of this application. The aforementioned readable storage medium includes various media capable of storing program code, such as USB flash drives, portable hard drives, read-only memory (ROM), random access memory (RAM), magnetic disks, or optical disks.

[0195] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A communication method, characterized in that, Applied to a first terminal, the method includes: Based on the first association relationship and the first parameter corresponding to the first terminal, a first initial uplink BWP is selected from multiple initial uplink partial bandwidth BWPs. The first association relationship is the association relationship between the initial uplink BWP and the first parameter. The first parameter includes the synchronization signal block reference signal received power and / or the terminal type. Based on the first initial uplink BWP, a random access request is sent to the network device.

2. The method according to claim 1, characterized in that, The method further includes: Receive first information from a network device, the first information indicating the first association.

3. The method according to claim 2, characterized in that, The first parameter includes the reference signal received power, and the first correlation includes the correlation between multiple initial uplink BWP groups and multiple reference signal received power ranges. An initial uplink BWP group includes one or more initial uplink BWPs.

4. The method according to claim 3, characterized in that, The first information also indicates the power threshold corresponding to the power range of the plurality of reference signals.

5. The method according to claim 3 or 4, characterized in that, The method further includes: A first received power value is obtained by measuring the reference signal from the network device; Wherein, the first received power value is within the first received power range, the multiple reference signal received power ranges include the first received power range, and the first initial uplink BWP belongs to the initial uplink BWP group corresponding to the first received power range.

6. The method according to claim 5, characterized in that, After sending a random access request based on the first initial uplink BWP, the method further includes: If no random access response is received from the network device within the preset time range, a random access request is sent to the network device based on the second initial uplink BWP, wherein the second initial uplink BWP is an initial uplink BWP other than the first initial uplink BWP in the initial uplink BWP group corresponding to the first power range.

7. The method according to claim 5 or 6, characterized in that, The first information also indicates the priority and / or load level of the initial uplink BWP.

8. The method according to claim 7, characterized in that, The first initial uplink BWP is the highest priority initial uplink BWP in the initial uplink BWP group corresponding to the first received power range, or the initial uplink BWP with the lowest load level.

9. The method according to claim 2, characterized in that, The first parameter is the terminal type, and the first association relationship includes the association relationship between multiple terminal types and multiple initial uplink BWP groups. An initial uplink BWP group includes one or more initial uplink BWPs.

10. The method according to claim 9, characterized in that, The terminal type is related to the terminal's capabilities and / or its energy-saving requirements.

11. The method according to claim 9 or 10, characterized in that, The terminal type of the first terminal is a first type, and the first type is included among the multiple terminal types. The first initial uplink BWP is an initial uplink BWP in the initial uplink BWP group corresponding to the first type.

12. The method according to claim 11, characterized in that, After sending a random access request based on the first initial uplink BWP, the method further includes: If no random access response is received from the network device within the preset time range, a random access request is sent to the network device based on the second initial uplink BWP. The second initial uplink BWP is an initial uplink BWP other than the first initial uplink BWP in the initial uplink BWP group corresponding to the first type.

13. The method according to claim 11 or 12, characterized in that, The first information also indicates the priority and / or load level of the plurality of initial uplink BWPs.

14. The method according to claim 13, characterized in that, The first initial uplink BWP is the highest priority initial uplink BWP in the initial uplink BWP group corresponding to the first type, or the initial uplink BWP with the lowest load level.

15. The method according to any one of claims 2 to 14, characterized in that, The first information is carried on the system information block SIB1 or the main information block MIB.

16. A communication method, characterized in that, Applied to network devices, the method includes: Send a first message indicating a first association relationship, which is the association relationship between the initial uplink portion bandwidth (BWP) and a first parameter, the first parameter including the synchronization signal block reference signal received power and / or the terminal type.

17. The method according to claim 16, characterized in that, The first parameter includes reference signal received power, and the first correlation includes the correlation between multiple reference signal received power ranges and multiple initial uplink BWP groups, wherein an initial uplink BWP group includes one or more BWPs.

18. The method according to claim 17, characterized in that, The first information also indicates the power threshold corresponding to the power range of the plurality of reference signals.

19. The method according to claim 16, characterized in that, The first parameter is the terminal type, and the first association relationship includes the association relationship between multiple terminal types and multiple initial uplink BWP groups. An initial uplink BWP group includes one or more BWPs.

20. The method according to claim 19, characterized in that, The terminal type is related to the terminal's capabilities and / or its energy-saving requirements.

21. The method according to any one of claims 16 to 20, characterized in that, The first information also indicates the priority and / or load level of the initial uplink BWP.

22. The method according to any one of claims 16 to 21, characterized in that, The first information is carried on the system information block SIB1 or the main information block MIB.

23. A communication method, characterized in that, Applied to a first terminal, the method includes: Receive third information from the network device, the third information being used to indicate the priority and / or load level of each initial uplink BWP among a plurality of initial uplink partial bandwidth BWPs; The first initial uplink BWP is selected from the plurality of initial uplink BWPs based on the third information; Based on the first initial uplink BWP, a random access request is sent to the network device.

24. The method according to claim 23, characterized in that, The first initial uplink BWP is either the highest priority initial uplink BWP among the plurality of initial uplink BWPs, or the initial uplink BWP with the lowest load level.

25. The method according to claim 23 or 24, characterized in that, After sending a random access request based on the first initial uplink BWP, the method further includes: If no random access response is received from the network device within a preset time range, a random access request is sent to the network device based on the second initial uplink BWP. The second initial uplink BWP is the initial uplink BWP with the highest priority or lowest load level among the multiple initial uplink BWPs, excluding the first initial uplink BWP.

26. The method according to any one of claims 23 to 25, characterized in that, The third information is carried on the system information block SIB1 or the main information block MIB.

27. A communication method, characterized in that, The method includes: Send a third message, which indicates the priority and / or load level of each initial uplink BWP among a plurality of initial uplink partial bandwidth BWPs.

28. The method according to claim 27, characterized in that, The third information is carried on the system information block SIB1 or the main information block MIB.

29. An apparatus, characterized in that, The apparatus includes a module or unit for performing the method of any one of claims 1 to 15, or the apparatus includes a module or unit for performing the method of any one of claims 16 to 22, or the apparatus includes a module or unit for performing the method of any one of claims 23 to 26, or the apparatus includes a module or unit for performing the method of claim 27 or 28.

30. A computer-readable storage medium, characterized in that, The storage medium stores a computer program or instructions, which, when executed by a device, result in the following: the method as described in any one of claims 1 to 15 is executed; or the method as described in any one of claims 16 to 22 is executed; or the method as described in any one of claims 23 to 26 is executed; or the method as described in claim 27 or 28 is executed.

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