Wireless communication method, terminal device and network device

Abstract

The invention provides a wireless communication method, terminal equipment and network equipment. The method comprises: a terminal device receiving first information sent by a network device, the first information comprising one or more PRACH configurations; therefore, the PRACH transmission can be more flexible, so that the PRACH transmission performance is improved.

Description

[0001] This application claims priority to PCT application number PCT / CN2024 / 131096, entitled “Method, terminal device and network device for wireless communication”, filed with the China Patent Office on November 8, 2024, the entire contents of which are incorporated by reference in this application. Technical Field

[0002] The present application relates to the field of communication technology, and more specifically, to a wireless communication method, terminal equipment and network equipment. Background Art

[0003] The random access process refers to the process from when the terminal device sends a random access preamble through the physical random access channel (PRACH) to try to access the network to the establishment of a basic signaling connection with the network. This process is a key step in establishing an initial communication connection between the terminal device and the network. Therefore, how to improve the performance of PRACH transmission has become a problem that needs to be solved. Summary of the invention

[0004] The present application provides a wireless communication method, terminal equipment and network equipment. The following introduces various aspects involved in the present application.

[0005] In a first aspect, a method for wireless communication is provided, comprising: a terminal device receives first information sent by a network device, wherein the first information includes one or more physical random access channel PRACH configurations.

[0006] According to a second aspect, a method for wireless communication is provided, comprising: a network device sends first information to a terminal device, wherein the first information comprises one or more physical random access channel PRACH configurations.

[0007] According to a third aspect, a terminal device is provided, comprising: a transceiver unit for receiving first information sent by a network device, wherein the first information comprises one or more physical random access channel PRACH configurations.

[0008] In a fourth aspect, a network device is provided, comprising: a transceiver unit, configured to send first information to a terminal device, wherein the first information comprises one or more physical random access channel PRACH configurations.

[0009] In a fifth aspect, a terminal device is provided, comprising a transceiver, a memory and a processor, wherein the memory is used to store programs, and the processor is used to call the programs in the memory and control the transceiver to receive or send signals so that the terminal device executes the method described in the first aspect.

[0010] In a sixth aspect, a network device is provided, comprising a transceiver, a memory and a processor, wherein the memory is used to store programs, and the processor is used to call the programs in the memory and control the transceiver to receive or send signals so that the network device executes the method described in the second aspect.

[0011] In a seventh aspect, a device is provided, comprising a processor, configured to call a program from a memory so that the device executes a method as described in any one of the first aspect or the second aspect.

[0012] In an eighth aspect, a chip is provided, comprising a processor for calling a program from a memory so that a device equipped with the chip executes the method described in the first aspect or the second aspect.

[0013] In a ninth aspect, a computer-readable storage medium is provided, on which a program is stored, wherein the program enables a computer to execute the method as described in the first aspect or the second aspect.

[0014] In a tenth aspect, a computer program product is provided, comprising a program, wherein the program enables a computer to execute the method as described in the first aspect or the second aspect.

[0015] In an eleventh aspect, a computer program is provided, wherein the computer program enables a computer to execute the method as described in the first aspect or the second aspect.

[0016] In an embodiment of the present application, a terminal device receives one or more PRACH configurations sent by a network device, thereby making PRACH transmission more flexible and improving PRACH transmission performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 2 is a diagram showing an example of a system architecture of a wireless communication system applicable to an embodiment of the present application.

[0018] Figure 2 A flowchart of a wireless communication method according to an embodiment of the present application is shown.

[0019] Figure 3 This is a flowchart of a wireless communication method according to another embodiment of the present application.

[0020] Figure 4 A schematic diagram of the structure of a terminal device according to an embodiment of the present application.

[0021] Figure 5 A schematic diagram of the structure of a network device according to an embodiment of the present application.

[0022] Figure 6 A schematic diagram of a device for communication according to an embodiment of the present application. DETAILED DESCRIPTION

[0023] The technical solution in this application will be described below in conjunction with the accompanying drawings.

[0024] Wireless communication system

[0025] Figure 1 1 is an example diagram of the system architecture of a wireless communication system 100 to which an embodiment of the present application can be applied. The wireless communication system 100 may include a network device 110 and a terminal device 120. The network device 110 may be a device that communicates with the terminal device 120. The network device 110 may provide network coverage for a specific geographical area, and may communicate with the terminal device 120 located in the coverage area. The terminal device 120 may access a network, such as a wireless network, through the network device 110. Optionally, the wireless communication system 100 may also include other network entities such as a network controller and a mobility management entity, which is not limited in the embodiment of the present application.

[0026] It should be understood that the technical solutions of the embodiments of the present application can be applied to various communication systems, such as: fifth generation (5G) system or new radio (NR), long term evolution (LTE) system, LTE frequency division duplex (FDD) system, LTE time division duplex (TDD), etc. The technical solutions provided in the present application can also be applied to future communication systems, such as the sixth generation mobile communication system, satellite communication system, etc.

[0027] In the embodiments of the present application, the terminal device may also be referred to as user equipment (UE), access terminal, user unit, user station, mobile station, mobile station (MS), mobile terminal (MT), remote station, remote terminal, mobile device, user terminal, terminal, wireless communication device, user agent or user device. The terminal device in the embodiments of the present application may be a device that provides voice and / or data connectivity to a user, and may be used to connect people, objects and machines, such as a handheld device with wireless connection function, a vehicle-mounted device, etc. The terminal device may also be a mobile phone, a tablet computer, a laptop, a PDA, a mobile internet device (MID), a wearable device, a virtual reality (VR) device, an augmented reality (AR) device, a wireless terminal in industrial control, a wireless terminal in self-driving, a wireless terminal in remote medical surgery, a wireless terminal in smart grid, a wireless terminal in transportation safety, a wireless terminal in smart city, a wireless terminal in smart home, etc. Optionally, the terminal device may be used to act as a base station. For example, the terminal device may act as a dispatching entity that provides sidelink signals between terminal devices in vehicle to everything (V2X) or device to device (D2D). For example, a cellular phone and a car communicate with each other using a sidelink signal. Cellular phones and smart home devices communicate without relaying communication signals through a base station.

[0028] In an embodiment of the present application, a network device may be a device for communicating with a terminal device. The network device may be an access network device or a wireless access network device. For example, the network device may be a base station. The base station may broadly cover the following various names, or may be replaced with the following names, for example: Node B (NodeB), evolved NodeB (evolved NodeB, eNB), next generation NodeB (next generation NodeB, gNB), relay station, transmission point (transmitting and receiving point, TRP), transmission point (transmitting point, TP), master station (MeNB), auxiliary station (SeNB), multi-standard wireless (MSR) node, home base station, network controller, access node, wireless node, access point (access point, AP), transmission node, transceiver node, baseband unit (base band unit, BBU), remote radio unit (remote radio unit, RRU), active antenna unit (active antenna unit, AAU), radio head (remote radiohead, RRH), central unit (central unit, CU), distributed unit (distributed unit, DU), positioning node, etc. The base station may be a macro base station, a micro base station, a relay node, a donor node or the like, or a combination thereof. The base station may also refer to a communication module, a modem or a chip used to be arranged in the aforementioned device or apparatus. The base station may also be a mobile switching center and a device to device D2D, vehicle-to-everything (V2X), a device that performs the base station function in machine-to-machine (M2M) communications, a network-side device in a 6G network, and a device that performs the base station function in future communication systems. The base station may support networks with the same or different access technologies. The embodiments of the present application do not limit the specific technologies and specific device forms adopted by the network equipment. The base station may support networks with the same or different access technologies. The embodiments of the present application do not limit the specific technologies and specific device forms adopted by the network equipment.

[0029] In addition, the base station can be fixed or mobile. For example, a helicopter or drone can be configured to act as a mobile base station, and one or more cells can move according to the location of the mobile base station. In other examples, a helicopter or drone can be configured to act as a device for communicating with another base station.

[0030] The network equipment and terminal equipment can be deployed on land, including indoors or outdoors, handheld or vehicle-mounted; they can also be deployed on the water surface; they can also be deployed on aircraft, balloons and satellites in the air. The embodiments of the present application do not limit the scenarios in which the network equipment and terminal equipment are located.

[0031] It should be understood that all or part of the functions of the communication device in the present application may also be implemented by software functions running on hardware, or by virtualization functions instantiated on a platform such as a cloud platform.

[0032] In the NR system, the random access process allows the terminal device to initiate a connection request to the network device when it is first powered on or resumed from a dormant state. When the terminal device needs to switch to a new cell, the connection is reestablished through the random access process. Through the random access process, the terminal device can request the network device to allocate resources for it for data transmission or other communications. When the traffic changes, the terminal device can dynamically request the required resources through PRACH to enhance the flexibility of the network. The use of random preambles can effectively reduce the probability of conflicts and handle conflicts through a retransmission mechanism. Events that trigger the random access process may include, for example, initial access from the radio resource control (RRC) idle (RRC_IDLE) state, RRC connection reestablishment process, scheduling request (SR) failure, beam failure recovery, etc. Therefore, the random access process may be performed when the terminal device is in the RRC idle state, the RRC activated (RRC_INACTIVE) state, and the RRC connected (RRC_CONNECTED) state. In order to enable terminal devices in the network to have the opportunity to perform random access, the network device needs to configure PRACH resources for the terminal devices to receive the random access preamble from the terminal devices. As an example, the terminal device can obtain the PRACH configuration through high-level signaling, thereby obtaining the PRACH resources in the time domain. Each PRACH configuration has a corresponding index, and each PRACH configuration corresponds to a distribution of random access opportunities (RO). The RO distribution is usually defined by the radio frame index, the subframe number within the frame, and the starting symbol within the time slot.

[0033] During the random access process, the terminal device first listens to the system information sent by the network device, such as system information block (SIB) 1 and SIB2, to understand the configuration and availability of PRACH resources. Then, based on the obtained PRACH configuration, the terminal device selects a PRACH preamble for random access. The terminal device sends the random access preamble in the predetermined PRACH time slot, and the network device processes the preamble after receiving it.

[0034] In NR, random access is a periodic, always-on process, and PRACH resources are usually fixed. However, the density of terminal device access requests is time-varying. When the user density is low, too many PRACH resources may cause resource waste. In such a cell, even in the absence of or light traffic, network devices may still need to frequently detect PRACH, resulting in additional energy consumption, which is not conducive to network energy saving (NES). When the density of terminal devices is high, insufficient PRACH resources may cause access congestion. In order to achieve network energy saving, network devices can shorten the monitoring time or extend the sleep time between ROs when the system load is low. However, PRACH configuration can only be updated through SIB1. Even if the number of terminal devices in a cell suddenly decreases significantly, and most of the configured ROs will not be used by terminal devices to perform random access procedures, network devices may still need to monitor each configured RO. Obviously, this situation is not conducive to network energy saving.

[0035] In low-load scenarios, by adaptively adjusting the period of PRACH transmission in the time domain, network devices can reduce unnecessary monitoring and enter a longer sleep state. However, network devices also need to ensure that the latency of terminal devices is not significantly affected. PRACH configuration will be provided through SIB1 or RRC messages according to the specific usage scenario of the random access process. Therefore, in principle, network devices can change PRACH configuration by updating system information or performing RRC reconfiguration. However, frequent updates of SIB1 or frequent RRC reconfiguration can also have an adverse effect on network energy saving and signaling overhead.

[0036] To this end, an embodiment of the present application provides a method for wireless communication, where a terminal device receives one or more PRACH configurations sent by a network device, so that PRACH transmission can be more flexible and the PRACH transmission performance is improved. That is, through one or more PRACH configurations, dynamic adjustment of PRACH resources is achieved, so that PRACH transmission can adapt to changes in factors such as traffic and load, network energy saving requirements, distribution of terminal devices, and time, thereby optimizing resource utilization and balancing the initial access performance of terminal devices.

[0037] It can be understood that for traditional terminal devices, such as terminal devices that support lower protocol versions (for example, Release 18 and earlier versions in NR), the network device indicates the PRACH configuration for it through system information or RRC messages, which is referred to as the basic PRACH configuration or the benchmark PRACH configuration below, and the PRACH period included in the basic PRACH configuration is referred to as the basic period or the benchmark period. The various PRACH parameters included in the basic PRACH configuration can be adjusted, but need to be updated through system information or RRC messages. The benchmark PRACH configuration may also be used by terminal devices that support higher versions (for example, Release 19 and later protocol versions in NR). At the same time, these high-version terminal devices can also obtain additional multiple PRACH configurations, that is, they can obtain additional PRACH resources for uplink access. Since the number of high-version terminal devices may be more in the future, providing them with additional multiple PRACH configurations and activating the PRACH configuration adapted to the current scenario for the terminal device can achieve network energy saving while meeting the uplink access requirements.

[0038] Combine the following Figure 2 , the embodiments of the present application are introduced in detail.

[0039] Figure 2 A flowchart of a wireless communication method provided in an embodiment of the present application. Figure 2 The method 200 shown can be performed by a terminal device and a network device. The terminal device can be, for example, Figure 1 The terminal device 120 shown in FIG. 1 , the network device may be, for example, Figure 1 The network device 110 shown in FIG.

[0040] See also Figure 2 , in step 210, the network device sends first information to the terminal device.

[0041] Correspondingly, in step 220, the terminal device receives the first information sent by the network device.

[0042] Among them, the first information includes one or more PRACH configurations. The first information is carried, for example, in an RRC message or system information (for example, SIB1 or SIB2). It can be understood that the one or more PRACH configurations may be PRACH configurations that are additionally configured by the network device for a terminal device of a higher version (for example, Release 19 and subsequent protocol versions in NR). Among them, the parameters in the one or more PRACH configurations may be at least partially different from the parameters in the basic PRACH configuration (for example, the PRACH configuration configured by the network device for a terminal device of Release 18 and earlier versions in NR); or, the parameters in the one or more PRACH configurations are the same as the parameters in the basic PRACH configuration, but the parameters in the one or more PRACH configurations can be adjusted through the second information, and the details of the second information are shown in the subsequent part.

[0043] The PRACH configuration may include, for example, one or more of the following parameters: an index of the PRACH configuration; a period of the PRACH resource; a subframe number corresponding to the PRACH time slot; the number of PRACH time slots; the number of ROs in the PRACH time slot; the RO interval; the PRACH frame offset; information on a combination of the PRACH frame offset and period; an offset of the index of the PRACH configuration relative to an index of a certain PRACH configuration (e.g., an index of the basic PRACH configuration); an offset of the RO interval in the PRACH configuration relative to an RO interval (e.g., an RO interval in the basic PRACH configuration). Among them, the subframe number corresponding to the PRACH time slot gives which subframes include the PRACH time slots for PRACH transmission, and the terminal device needs to perform random access in these time slots. The number of PRACH time slots refers to the number of time slots allocated to the terminal device for PRACH transmission in the subframe corresponding to the above subframe number. The number of ROs refers to the number of ROs that can be used for random access in each PRACH resource (e.g., a PRACH time slot). The period of PRACH resources, hereinafter also referred to as the period for transmitting PRACH or PRACH period, refers to the time interval for repeated occurrence of PRACH resources. This parameter affects the timing of the terminal device sending a random access request, namely RO. Among them, each PRACH resource may include multiple RO positions, and the interval between adjacent RO positions in multiple RO positions is called the RO interval. PRACH frame offset refers to the offset of the radio frame where the PRACH resource is located relative to a certain radio frame. Among them, the frame number of the radio frame where the PRACH resource is located modulo the PRACH period can obtain the PRACH frame offset. As an example, the frame number of the radio frame where the PRACH resource is located modulo x to obtain y, that is, n f mod x = y, where n fis the radio frame where the PRACH resource is located, x is the period of the PRACH resource, and y is the PRACH frame offset. The unit of the period of the PRACH resource and / or the PRACH frame offset may be, for example, a radio frame, or a time unit (for example, milliseconds), etc. The period of the PRACH resource may be, for example, the parameter x shown in Table 6.3.3.2 in protocol 38.211, and the PRACH frame offset may be, for example, the parameter y shown in Table 6.3.3.2 in protocol 38.211. Since there may be an association between the PRACH frame offset and the period, for example, a certain PRACH frame offset may be associated with one or more periods, therefore, in an embodiment of the present application, all possible periods and PRACH frame offsets may be combined to obtain information of multiple combinations of periods and PRACH frame offsets, for example, the serial numbers of multiple combinations.

[0044] Some or all of the above parameters (e.g., period of PRACH resources, subframe number corresponding to PRACH time slot, number of PRACH time slots, number of ROs in PRACH time slots, RO interval, PRACH frame offset, etc.) in different PRACH configurations in the multiple PRACH configurations may be different. In addition, the multiple PRACH configurations may have respective indexes, such as PRACH configuration #1, PRACH configuration #2, ..., PRACH configuration #N.

[0045] As mentioned above, the network device can also send a basic PRACH configuration to the terminal device, and accordingly, the terminal device receives the basic PRACH configuration sent by the network device. The basic PRACH configuration can be carried in an RRC message or system information (e.g., SIB1), for example. Among them, the basic PRACH configuration includes a basic period for PRACH transmission. When configuring PRACH resources, the network device provides a basic PRACH configuration for traditional terminal devices, and configures one or more additional PRACH configurations (i.e., one or more PRACH configurations indicated in the first information) for high-version terminal devices. Among them, the additional one or more PRACH configurations can share some parameters with the basic PRACH configuration, for example, the basic PRACH configuration and the additionally configured PRACH configuration include the same parameters as the subframe number corresponding to the PRACH time slot, the number of PRACH time slots, the number of ROs in the PRACH time slot, the PRACH frame offset, the RO interval, etc., and only the PRACH period is different. In addition, the additional PRACH configuration may include other periods that are different from the basic period in the basic PRACH configuration. In some implementations, the period included in the additional PRACH configuration is smaller than the basic PRACH period. For example, the one or more periods in the first information are 1 / 2 of the basic period. M, wherein the value of M associated with the one or more cycles may be different, and M is a positive integer.

[0046] For the same number of SSBs, as the number of PRACH configurations increases, the gain of network energy saving generally increases. The network device notifies the terminal device of the time domain resources used for PRACH transmission, such as period, subframe, time slot, and orthogonal frequency division multiplexing (OFDM) symbols used, through the index of the PRACH configuration indicated in the SIB1 or RRC message. Therefore, the network device can configure an always-online PRACH mode including a basic period for traditional terminal devices, and configure one or more additional PRACH modes different from the basic PRACH configuration for high-version terminal devices, that is, a flexible and variable PRACH configuration, so that the adaptive decision of the network device is more dynamic, and the network device can notify the high-version terminal device of the PRACH configuration currently required to be used (which can be a basic PRACH configuration or one or more additional PRACH configurations) through new signaling (for example, carrying the second information), so as to adapt to the current scenario without affecting the uplink access performance of traditional terminal devices.

[0047] As the number of high-version terminal devices increases, in addition to the basic PRACH configuration, additional PRACH resources are configured to meet the access needs of more terminal devices. For example, when the load is high, the PRACH transmission period is reduced, thereby increasing PRACH resources to avoid access congestion caused by insufficient PRACH resources; when the load is reduced, the PRACH transmission period is increased, thereby reducing PRACH resources to facilitate network energy saving.

[0048] The basic PRACH configuration and the additional one or more PRACH configurations can be sent to the terminal device at the same time (for example, carried in the same message), or can be sent to the terminal device relatively independently (for example, carried in different messages). The basic PRACH configuration still exists in order not to affect the uplink access of traditional terminal devices, because traditional terminal devices may not be able to parse the first information and / or second information sent to high-version terminal devices.

[0049] In some implementations, such as Figure 3As shown, the method 200 may further include step 230 and step 240. In step 230, the network device sends the second information to the terminal device; correspondingly, in step 240, the terminal device receives the second information sent by the network device. The second information may be carried in a media access control control element (MAC CE) or downlink control information (DCI), for example.

[0050] The second information may be used to indicate adjustment of parameters in a PRACH configuration used by the terminal device. For example, the first information includes an additional PRACH configuration, and the second information may be used to indicate adjustment of parameters in the PRACH configuration, such as adjustment of the period, RO number, RO interval and other parameters of the PRACH resource in the PRACH configuration. As an example, the second information may be indication information for indicating an increase in the period of the PRACH resource, indication information for indicating a decrease in the period of the PRACH resource, indication information for indicating an increase in the RO interval, indication information for indicating a decrease in the RO interval, or indication information for indicating adjustment of other parameters in the PRACH configuration.

[0051] Alternatively, the second information may be used to indicate whether to adjust a parameter in the PRACH configuration used by the terminal device. For example, bit 0 may indicate not to adjust a certain parameter, and bit 1 may indicate to adjust the parameter, which may be, for example, a parameter such as a PRACH frame offset.

[0052] Alternatively, the second information is used to activate a first PRACH configuration among one or more PRACH configurations. The network device configures multiple additional PRACH configurations for the terminal device through, for example, system information or RRC configuration, and indicates the PRACH configuration that needs to be activated, i.e., the first PRACH configuration, through, for example, an RRC message, system information, MAC CE, or DCI, wherein the network device can simultaneously activate one or more PRACH configurations through the second information. For example, when activating a PRACH configuration, the index of the PRACH configuration can be carried in the second information; when activating multiple PRACH configurations, a set of indexes of multiple PRACH configurations can be carried in the second information.

[0053] Optionally, the network device may activate the first PRACH configuration or adjust the parameters in the PRACH configuration through the second information while configuring one or more PRACH configurations for the terminal device through the first information. It may also activate the first PRACH configuration or adjust the parameters in the PRACH configuration through the second information after configuring one or more PRACH configurations for the terminal device through the first information. In the case where the first information and the second information are transmitted simultaneously, when the terminal device has just accessed the cell and obtained the first information, it can obtain additional PRACH configuration information. In this way, when a high-version terminal device has just accessed the cell, it will not compete with traditional terminal devices for PRACH resources suitable for uplink access of traditional terminal devices, thereby reducing the probability of PRACH resource conflicts.

[0054] Compared with the basic RACH configuration, the embodiment of the present application can indicate through the second information which PRACH configuration the terminal device needs to use among the multiple PRACH configurations previously configured for it through high-level signaling without updating the system information, that is, without updating the system information, dynamic signaling is used to provide additional PRACH resources for uplink access of the terminal device according to the needs of the current scenario. By reducing PRACH reception activity, longer sleep of network devices can be achieved, and by increasing PRACH resources, congestion caused by access requirements of a large number of terminal devices can be avoided.

[0055] Since the above-mentioned one or more PRACH configurations have their own indexes, the second information can carry the index of the first PRACH configuration that needs to be activated. As an example, if the network device configures 3 additional PRACH configurations for the terminal device, the corresponding indexes are PRACH configuration #1, PRACH configuration #2 and PRACH configuration #3, respectively. If the index of the first PRACH configuration that needs to be activated is PRACH configuration #1, then the second information carries PRACH configuration #1, if the index of the first PRACH configuration that needs to be activated is PRACH configuration #2, then the second information carries PRACH configuration #2, and if the index of the first PRACH configuration that needs to be activated is PRACH configuration #3, then the second information carries PRACH configuration #3. Of course, the second information can also carry the index of the basic PRACH configuration. Assuming that the index of the basic PRACH configuration is PRACH configuration #0, when the second information carries PRACH configuration #0, the terminal device can perform uplink access based on the basic PRACH configuration. The second information may also carry indexes of multiple PRACH configurations at the same time. In this case, the terminal device may perform uplink access based on multiple PRACH configurations, for example, using an RO determined based on different periods in one or more PRACH configurations for uplink access.

[0056] In some implementations, the index of the first PRACH configuration is adjacent to the index of the second PRACH configuration, wherein the second PRACH configuration is the PRACH configuration activated last time. That is, the network device can activate the PRACH configuration based on the order of the indexes. For example, the network device configures three PRACH configurations for the terminal device, and the corresponding indexes are PRACH configuration #1, PRACH configuration #2, and PRACH configuration #3, wherein the period of PRACH configuration #1 is less than the period of PRACH configuration #3 and less than the period of PRACH configuration #3. If the last activated configuration is PRACH configuration #2, then if the period of PRACH transmission needs to be increased, the network device instructs the terminal device through the second information to activate the PRACH configuration whose index after PRACH configuration #2 is PRACH configuration #3. If the period of PRACH transmission needs to be reduced, the network device instructs the terminal device through the second information to activate the PRACH configuration whose index before PRACH configuration #2 is PRACH configuration #1.

[0057] In addition to activating a certain PRACH configuration in one or more PRACH configurations, namely the first PRACH configuration, so that all parameters in the first PRACH configuration are effective, the network device may also activate only a certain period in the different periods included in the one or more PRACH configurations, while other parameters in the PRACH configuration remain unchanged. In this case, the second information may also include information about the adjusted period, or information about the period in the first PRACH configuration. Optionally, if the network device configures multiple periods of PRACH resources for the terminal device, the multiple periods may also have corresponding indexes, and the second information may include the index of the first period that needs to be activated among the multiple periods. As an example, if the network device configures three periods of PRACH resources for the terminal device, the corresponding indexes are period #1, period #2, and period #3, respectively. If the index of the first period that needs to be activated is period #1, the second information carries period #1, if the index of the first period that needs to be activated is period #2, the second information carries period #2, and if the index of the first period that needs to be activated is period #3, the second information carries period #3. Of course, the second information may also carry the index of the basic period (for example, the period in the basic PRACH configuration). Assuming that the index of the basic period is period #0, when the second information carries period #0, the terminal device can perform uplink access based on the basic period. The second information may also carry the indexes of multiple periods at the same time. In this case, the terminal device can perform uplink access based on multiple periods, for example, using RO determined based on multiple periods for uplink access.

[0058] In some implementations, the index of the first period is adjacent to the index of the second period, wherein the second period is the period last activated. That is, the network device can activate the period based on the order of the indexes. As an example, the network device configures three periods for the terminal device, and the corresponding indexes are period #1, period #2, and period #3. Among them, the period of period #1 is less than the second period of period #2 and less than the third period of period #3. If the last activated period is period #2, then if the period of the PRACH resource needs to be increased, the network device instructs the terminal device through the second information to activate the period after period #2 with the index of period #3. If the period of the PRACH transmission needs to be reduced, the network device instructs the terminal device through the second information to activate the period before period #2 with the index of period #1.

[0059] In other implementations, the second information may also include indication information for increasing the period of the PRACH resource or indication information for decreasing the period of the PRACH resource. That is, the network device may instruct the terminal device to increase or decrease the period of the PRACH resource currently in use based on a predetermined rule. For example, the first period may be 1 / N1 of the second period last activated, N1 being a positive integer (e.g., N1=2); or, the first period may be N2 times the second period, N2 being a positive integer (e.g., N2=2); or, the first period may be the result of increasing the first ratio of the second period (i.e., increasing the second period by the first ratio to obtain the first period); or, the first period may be the result of reducing the second ratio of the second period (i.e., reducing the second period by the second ratio to obtain the first period). The first ratio and the second ratio are, for example, greater than 0 and less than 1. The possible values ​​of the first period after increasing or decreasing are pre-agreed or configured by the network device. As an example, the period of PRACH resources may include 20ms, 40ms, 80ms, 120ms, and 160ms. The period currently in use is 80ms. If the network device indicates the activation of a new period through the second information, and the new period is twice the current period, the terminal device switches the period of PRACH transmission from 80ms to 160ms, and performs PRACH transmission based on the new period of 160ms; if the network device indicates the activation of a new period through the second information, and the new period is 1 / 2 of the current period, the terminal device switches the period of PRACH transmission from 80ms to 160ms. If the network device indicates the activation of a new period through the second information, and the new period is 50% greater than the current period, the terminal device switches the period of PRACH transmission from 80ms to 120ms, and performs PRACH transmission based on the new period of 120ms; if the network device indicates the activation of a new period through the second information, and the new period is 75% less than the current period, the terminal device switches the period of PRACH transmission from 80ms to 20ms, and performs PRACH transmission based on the new period of 20ms. It should be noted that the above-mentioned multiple periods may be multiple periods included in multiple PRACH configurations, or may be multiple periods configured independently of the above-mentioned multiple PRACH configurations.

[0060] In other implementations, the second information may also include one or more of the following information: information about the adjusted RO interval; information about the adjusted PRACH frame offset; information indicating an increase in the RO interval; information indicating a decrease in the RO interval; information indicating an increase in the PRACH frame offset; information indicating a decrease in the PRACH frame offset; information about a combination of the adjusted PRACH frame offset and period; an offset between the adjusted period and a specific period (e.g., a period in the basic PRACH configuration, or a period currently in use); an offset between the adjusted PRACH frame offset and a specific PRACH frame offset (e.g., a PRACH frame offset in the basic PRACH configuration, or a PRACH frame offset currently in use). For the adjustment process of the RO interval and the PRACH frame offset, reference may be made to the above-mentioned adjustment process of adjusting the period of the PRACH resource through the second information, which will not be repeated here.

[0061] In addition, in some implementations, the second information may also include an offset of the index of the first PRACH configuration relative to the index of the basic PRACH configuration; or, an offset (or difference) between the adjusted RO interval and a specific RO interval (e.g., the RO interval in the basic PRACH configuration or the currently used RO interval); or, an offset (or difference) between the adjusted PRACH frame offset and a specific PRACH frame offset (e.g., the PRACH frame offset in the basic PRACH configuration, or the currently used PRACH frame offset). Optionally, the index of the first PRACH configuration may be one of the indexes of multiple PRACH configurations associated with the first preamble format, and the first preamble format may be, for example, a preamble format associated with the basic PRACH configuration. Here, the indexes of the multiple PRACH configurations associated with the first preamble format are the indexes obtained after reordering, that is, the indexes of the multiple PRACH configurations associated with the first preamble format may be renumbered to obtain the corresponding indexes of the multiple PRACH configurations. Assume that preamble format 0 is associated with index #0 to index #27 of the PRACH configuration, preamble format 1 is associated with index #28 to index #56 of the PRACH configuration, and the index of the basic PRACH configuration is index #28, then the first preamble format is preamble format 1, and therefore, the index of the first PRACH configuration should be one of index #28 to index #56 of the PRACH configuration associated with preamble format 1. Alternatively, the PRACH configuration associated with preamble format 1 may also be rearranged in index order, and the indexes of the rearranged PRACH configurations are index #0 to index #28, and then, the index of the first PRACH configuration should be one of index #0 to index #28. By indicating the index offset by the second information, the overhead of physical layer signaling can be saved.

[0062] In some implementations, the adjusted period is one of multiple periods associated with the first preamble format, and the information of the adjusted period is the sequence number of the adjusted period obtained after the multiple periods are reordered; and / or, the adjusted period is one of the multiple periods associated with the first preamble format and the frame offset in the second PRACH configuration, and the information of the adjusted period is the sequence number of the adjusted period obtained after the multiple periods are reordered; and / or, the adjusted PRACH frame offset is one of the multiple PRACH frame offsets associated with the first preamble format, and the information of the adjusted PRACH frame offset is the adjusted PRACH frame offset obtained after the multiple PRACH frame offsets are reordered. The sequence number of the PRACH frame offset; and / or, the adjusted PRACH frame offset is one of multiple PRACH frame offsets associated with the period in the first preamble format and the second PRACH configuration, and the information of the adjusted PRACH frame offset is the sequence number of the adjusted PRACH frame offset obtained after reordering multiple PRACH frame offsets; and / or, the combination of the adjusted period and the PRACH frame offset is one of multiple combinations of the period and the PRACH frame offset associated with the first preamble format, and the information of the combination of the adjusted period and the PRACH frame offset is the sequence number of the combination of the adjusted period and the PRACH frame offset obtained after reordering multiple combinations. The second PRACH configuration includes, for example, a basic PRACH configuration or a currently used PRACH configuration.

[0063] As an example, as shown in Table 1, the indexes of the PRACH configuration include #1 to #12, and each index has its associated period (i.e., x) and PRACH frame offset (i.e., y). Taking the second information carried in DCI as an example, when the DCI indicates the value of the period, the value of the period may be 2, 4, 8, or 16, and the value of the PRACH frame offset may be 0 or 1. The DCI may be set to carry 4 bits, and different values ​​of the 4 bits respectively indicate the 16 situations shown in Table 1, i.e., information of 16 combinations of PRACH frame offset and period.

[0064] Table 1

[0065] Serial number Period (x) PRACH frame offset (y) 1 2 1 2 4 1 3 8 1 4 16 1 5 1 0 6 2 0 7 4 0 8 8 0 9 16 0 10 4 1,2 11 8 1,2 12 16 1,2

[0066] For another example, as shown in Tables 2 to 6, a combination of a period and a PRACH frame offset is associated with a preamble format, and the second information indicates a combination of a period and a PRACH frame offset associated with a specific preamble format, i.e., (x, y). For example, for a PRACH configuration of FR1 and paired spectrum / supplementary uplink, the preamble format may include preamble format 0, preamble format 1, preamble format 2, preamble format 3, preamble format A1, preamble format B1, preamble format B2, etc. For different preamble formats, the number of bits required to carry the second information may be different. As shown in Table 2, preamble format 0, preamble format 1, and preamble format 3 include 5 combinations of periods and PRACH frame offsets, i.e., there are 5 groups of candidate values, which can be indicated by 3 bits. As shown in Table 3, preamble format 2 includes 5 combinations of periods and PRACH frame offsets, i.e., there are 5 groups of candidate values, which can be indicated by 3 bits. As shown in Table 4, preamble format A1 includes 8 combinations of periods and PRACH frame offsets, i.e., there are 8 groups of candidate values, which can be indicated by 3 bits. As shown in Table 5, preamble format 2 includes 2 combinations of periods and PRACH frame offsets, that is, there are 2 sets of candidate values, which can be indicated by 1 bit. As shown in Table 6, preamble format A2 includes 6 combinations of periods and PRACH frame offsets, that is, there are 6 sets of candidate values, which can be indicated by 3 bits. Optionally, in Tables 2 to 6, the multiple combinations of periods and PRACH frame offsets can be the sequence numbers of the combinations of periods and PRACH frame offsets obtained after reordering. For example, the sequence numbers of the five combinations of the period and the PRACH frame offset associated with each of the preamble formats 0, 1, and 5 in Table 2 are 1, 2, 3, 4, and 5, respectively; the sequence numbers of the five combinations of the period and the PRACH frame offset associated with the preamble format 2 in Table 3 are 1, 2, 3, 4, and 5, respectively; the sequence numbers of the eight combinations of the period and the PRACH frame offset associated with the preamble format A1 in Table 4 are 1, 2, 3, 4, 5, 6, 7, and 8, respectively; the sequence numbers of the two combinations of the period and the PRACH frame offset associated with the preamble formats A1 and B1 in Table 5 are 1 and 2, respectively; the sequence numbers of the six combinations of the period and the PRACH frame offset associated with the preamble format A2 in Table 6 are 1, 2, 3, 4, 5, and 6, respectively. By indicating the corresponding sequence number through the second information, the terminal device can know the period and / or PRACH frame offset to be used with a smaller number of bits.

[0067] Table 2

[0068] Serial number Period (x) PRACH frame offset (y) 1 2 1 2 4 1 3 8 1 4 16 1 5 1 0

[0069] Table 3

[0070] Serial number Period (x) PRACH frame offset (y) 1 8 1 2 16 1 3 1 0 4 2 0 5 4 0

[0071] Table 4

[0072] Serial number Period (x) PRACH frame offset (y) 1 4 1 2 8 1 3 16 1 4 1 0 5 2 0 6 4 0 7 8 0 8 16 0

[0073] Table 5

[0074] Serial number Period (x) PRACH frame offset (y) 1 1 0 2 2 0

[0075] Table 6

[0076] Serial number Period (x) PRACH frame offset (y) 1 2 1 2 8 1 3 16 1 4 1 0 5 2 0 6 4 0

[0077] In other implementations, the second information may only indicate the period, for example, x may be 16, 8, 4, 2 or 1. Of course, the offset of the period may also be indicated, for example, based on the offset of the period in the basic PRACH configuration, assuming that the period in the basic PRACH configuration is 8 and the adjusted period is 4, the second indication information may indicate the offset of the period, that is, 8-4=4. Of course, in the case where the second information only indicates the period, the period may be one of multiple periods associated with a specific preamble format, or one of multiple periods simultaneously associated with a specific preamble format and a PRACH frame offset. For example, when the preamble format is 0 and the PRACH frame offset is 1, candidate values ​​of the period include 16, 8, 4, and 2.

[0078] Similarly, the second information may also only indicate the PRACH frame offset, for example, y may be 0, or may be 1, or may be (1, 2). Of course, in the case where the second information only indicates the PRACH frame offset, the PRACH frame offset may be one of multiple PRACH frame offsets associated with a certain preamble format, or one of multiple PRACH frame offsets associated with a certain specific preamble format and period. For example, in the case where the preamble format is 0, the candidate values ​​of the PRACH frame offset may include 0 and 1.

[0079] The units of x and y shown in Tables 2 to 6 above may be radio frames. The frame number of the radio frame where the PRACH resource is located is modulo x to obtain the y value. Therefore, the y value can be regarded as the offset of the radio frame where the PRACH resource is located relative to a certain radio frame (the radio frame corresponding to the frame number equal to 0 after modulo x) (i.e., how many radio frames are offset). The radio frame where the PRACH resource is located may include one or more (for example, 2). If the number of radio frames where the PRACH resource is located is 2, two PRACH frame offsets may correspond (for example, the PRACH frame offset is (1, 2)).

[0080] As mentioned above, the network device can dynamically deactivate (or disable) or activate (or start) an additional PRACH configuration in the one or more PRACH configurations. The PRACH configuration indicated by the network device as not activated will be deactivated, and the network device does not need to monitor the RO position determined based on these PRACH configurations, thereby achieving energy saving. If a high-version terminal device is activated based on a PRACH configuration in the additional one or more PRACH configurations, it is preferred to select the RO position determined based on the PRACH configuration for uplink access, thereby avoiding the increase in random access congestion at the RO position determined based on the basic PRACH configuration. In the case where a large number of terminal devices have access requirements, more RO resources are provided by activating additional PRACH configurations, thereby reducing collisions during random access.

[0081] In NR, the random access process uses beams, in which SSB has multiple transmission opportunities within the time domain period, and has corresponding numbers corresponding to different beams. For the terminal device, the terminal device has the opportunity to send the preamble code only when the beam scanning signal of SSB covers the terminal device. When the network device receives the preamble code of the terminal device, it knows the best downlink beam, that is, it knows which beam points to the terminal device. Therefore, SSB needs to have an association with the preamble code, and the preamble code is sent on the RO, so there is usually a predetermined mapping relationship between SSB and RO. In other words, when the PRACH configuration is determined, the RO position is determined, and there is a mapping relationship between SSB and RO positions. For example, taking the basic PRACH configuration as an example, assuming that the SSB burst includes 4 SSBs, the corresponding SSB indexes (SSBindex) are SSB#0, SSB#1, SSB#2 and SSB#3, respectively, wherein the mapping relationship may, for example, include: SSB#0 is mapped to RO position 0, SSB#1 is mapped to RO position 1, SSB#2 is mapped to RO position 2, SSB#3 is mapped to RO position 3, RO position 0, RO position 1, RO position 2 and RO position 3 may be determined based on relevant parameters in the basic PRACH configuration, for example, the interval between two adjacent RO positions among RO position 0, RO position 1, RO position 2 and RO position 3 may be equal to the basic period. At this time, if the terminal device uses the beam corresponding to SSB#0, PRACH transmission can be performed at RO position 0; if the beam corresponding to SSB#1 is used, PRACH transmission can be performed at RO position 1; if the beam corresponding to SSB#2 is used, PRACH transmission can be performed at RO position 2; if the beam corresponding to SSB#3 is used, PRACH transmission can be performed at RO position 3. Among them, one SSB can be mapped to one or more ROs, and one RO can also be mapped to one or more SSBs. In different mapping relationships, the ROs associated with the same SSB may be different, and the SSBs associated with the same RO may also be different, which is not limited in the embodiments of the present application.

[0082] In the case of introducing one or more additional PRACH configurations, it is necessary to consider how to map the RO position determined based on the new PRACH configuration to the SSB. If the RO position determined based on the additional PRACH configuration is mapped to the SSB together with the RO position determined based on the basic PRACH configuration, the mapping relationship between the RO position determined based on the basic PRACH configuration and the SSB may be disturbed after adding the additional PRACH configuration. In other words, the additional RO position configured for a higher version of terminal devices may lead to inconsistent mapping of SSB to RO position between traditional terminal devices and higher version terminal devices. This inconsistency may cause the network device to be unable to determine which SSB corresponds to the received PRACH transmission, and the network device cannot obtain the receiving direction through the SSB corresponding to the PRACH, and can only receive signals by receiving beam scanning, and cannot perform efficient reception through receiving beam forming.

[0083] To this end, in some implementations, there is a first mapping relationship between the RO determined based on each PRACH configuration in one or more additional PRACH configurations and the SSB, and there is a second mapping relationship between the RO determined based on the basic PRACH configuration and the SSB. In this case, two mapping relationships are set, one is the second mapping relationship between the RO and the SSB determined based on the basic PRACH configuration, which can also be regarded as a traditional mapping relationship, and the other is the first mapping relationship between the RO and the SSB determined for the additional PRACH configuration. That is to say, the RO determined based on each PRACH configuration in one or more PRACH configurations, and the RO determined based on the basic PTACH configuration, are mapped separately. The first mapping relationship can be used by, for example, a traditional terminal device, and the second mapping relationship can be used by, for example, a high-version terminal device.

[0084] In order to avoid resource interference between the ROs involved in the two mapping relationships, in some implementations, the ROs in the first mapping relationship do not overlap with the ROs in the second mapping relationship. That is, the first mapping relationship only maps the SSB to those RO positions that are different from the RO positions in the second mapping relationship. In other implementations, the ROs in the first mapping relationship and the ROs in the second mapping relationship overlap at least partially. For example, the first mapping relationship maps the SSB to all ROs that may be used by the terminal device of the higher version (for example, including the RO determined based on the basic PRACH configuration and the RO determined based on the additional PRACH configuration), that is, the RO in the first mapping relationship includes the RO determined based on the basic PRACH configuration and the RO determined based on the additional PRACH configuration, and the RO in the second mapping relationship includes the RO determined based on the basic PRACH configuration. At this time, there may be a partial overlap between the ROs in the first mapping relationship and the ROs in the second mapping relationship. For traditional terminal devices, the number of ROs mapped to one SSB or the number of ROs to which one SSB is mapped is configured by the network device (for example, configured by an RRC message), and the mapping order is also predetermined. If the RO determined based on the basic PRACH configuration is mapped to the SSB together with the RO determined based on the additional PRACH configuration, the second mapping relationship between the RO determined based on the basic PRACH configuration and the SSB may be disturbed. Obviously, it is not easy to ensure that the mapping relationship remains unchanged after the RO determined based on the additional PRACH configuration appears, because the mapping between SSB and RO is usually performed in sequence. In this case, when the RO determined based on an additional PRACH configuration is activated, the behavior of the traditional terminal device in RO selection will change, resulting in unnecessary implementation complexity of the traditional terminal device. Therefore, mapping the RO determined based on the additional PRACH configuration and the RO determined based on the basic PRACH configuration to the SSB respectively is conducive to maintaining the mapping relationship between the SSB and RO used by the traditional terminal device.

[0085] Optionally, for a high-version terminal device, when the RO associated with the same SSB in the first mapping relationship and the second mapping relationship is different, the RO associated with the same SSB in the first mapping relationship is used for PRACH transmission of the terminal device. For a high-version terminal device, if the additional PRACH configuration is activated, and there are two ROs associated with the same SSB, namely a certain RO position determined based on the basic PRACH configuration and a certain RO determined based on the additional PRACH configuration, when the high-version terminal device gives priority to the RO determined based on the basic PRACH configuration, since the RO may also be used by traditional terminal devices for random access, the congestion level on the RO will increase significantly. Therefore, in this case, the RO determined based on the additional PRACH configuration can be given priority. In addition, the preamble code configuration related to the network energy-saving function is transmitted within the RO determined based on the additional PRACH configuration. Therefore, the high-version terminal device selects the RO determined based on the additional PRACH configuration when the network energy-saving function or the corresponding PRACH configuration is activated.

[0086] The above describes the case where the RO determined based on each PRACH configuration in one or more PRACH configurations and the RO determined based on the basic PRACH configuration are mapped separately. In other implementations, the RO determined based on each PRACH configuration in the one or more PRACH configurations and the RO determined based on the basic PRACH configuration can also be mapped together. That is to say, the RO determined based on each PRACH configuration in the one or more PRACH configurations and the RO determined based on the basic PRACH configuration are mapped to the SSB as a whole. For example, the RO determined by the parameters in the additional PRACH configuration and the RO determined based on the parameters in the basic PRACH configuration have a third mapping relationship with the SSB. In this case, both high-version terminal devices and traditional terminal devices need to follow the third mapping relationship. Assuming that 4 RO positions are determined based on the basic PRACH configuration and 8 RO positions are determined based on the additional PRACH configuration, these 12 RO positions can be mapped to the SSB as a whole, that is, the third mapping relationship is obtained.

[0087] Combination of the above Figures 1 to 3 , describes the method embodiment of the present application in detail, and the following is combined with Figures 4 to 6 , describes the device embodiment of the present application in detail. It should be understood that the description of the method embodiment corresponds to the description of the device embodiment, so the parts not described in detail can refer to the previous method embodiment.

[0088] Figure 4 A schematic diagram of the structure of a terminal device provided in an embodiment of the present application. Figure 4The terminal device 400 shown may include a transceiver unit 410. The transceiver unit 410 is configured to receive first information sent by a network device, wherein the first information includes one or more PRACH configurations.

[0089] In some implementations, the PRACH configuration includes one or more of the following parameters: an index of the PRACH configuration; a period of the PRACH resources; a subframe number corresponding to the PRACH time slot; the number of PRACH time slots; the number of ROs in the PRACH time slot; the RO interval; the PRACH frame offset; information on a combination of the PRACH frame offset and period; and an offset of the index of the PRACH configuration relative to the index of the base PRACH configuration.

[0090] In some implementations, the transceiver unit 410 is also used to: receive second information sent by the network device, the second information is used to activate the first PRACH configuration among the one or more PRACH configurations, or the second information is used to indicate adjustment of parameters in the PRACH configuration used by the terminal device, or the second information is used to indicate whether to adjust the parameters in the PRACH configuration used by the terminal device.

[0091] In some implementations, the second information includes one or more of the following: an index of the first PRACH configuration; information about the adjusted period; information about the adjusted RO interval; information about the adjusted PRACH frame offset; information about a combination of the adjusted PRACH frame offset and period; information indicating an increase in the period of PRACH resources; information indicating a decrease in the period of PRACH resources; information indicating an increase in the RO interval; information indicating a decrease in the RO interval; an offset of the index of the first PRACH configuration relative to the index of the basic PRACH configuration; an offset between the adjusted period and a specific period; an offset between the adjusted PRACH frame offset and a specific PRACH frame offset.

[0092] In some implementations, the index of the first PRACH configuration is one of the indexes of multiple PRACH configurations associated with the first preamble format, and the index of the first PRACH configuration is the sequence number of the first PRACH configuration obtained by reordering the indexes of the multiple PRACH configurations; and / or, the adjusted period is one of the multiple periods associated with the first preamble format, and the information of the adjusted period is the sequence number of the adjusted period obtained after the multiple periods are reordered; and / or, the adjusted period is one of the multiple periods associated with the first preamble format and the frame offset in the second PRACH configuration, and the information of the adjusted period is the sequence number of the adjusted period obtained after the multiple periods are reordered; and / or, the adjusted PRACH frame offset is one of the multiple PRACH frame offsets associated with the first preamble format, and the adjusted PRACH frame offset is one of the multiple PRACH frame offsets associated with the first preamble format. The information of PRACH frame offset is the serial number of the adjusted PRACH frame offset obtained after reordering the multiple PRACH frame offsets; and / or, the adjusted PRACH frame offset is one of the multiple PRACH frame offsets associated with the first preamble format and the period in the second PRACH configuration, and the information of the adjusted PRACH frame offset is the serial number of the adjusted PRACH frame offset obtained after reordering the multiple PRACH frame offsets; and / or, the combination of the adjusted period and the PRACH frame offset is one of the multiple combinations of the period and the PRACH frame offset associated with the first preamble format, and the information of the combination of the adjusted period and the PRACH frame offset is the serial number of the combination of the adjusted period and the PRACH frame offset obtained after reordering the multiple combinations; wherein, the first preamble format is a preamble format associated with the index of the basic PRACH configuration.

[0093] In some implementations, the second PRACH configuration includes: a basic PRACH configuration sent by a network device to a terminal device; or a PRACH configuration currently used by the terminal device.

[0094] In some implementations, the index of the first PRACH configuration is adjacent to the index of the second PRACH configuration, and the second PRACH configuration is the last activated PRACH configuration; the index of the first period is adjacent to the index of the second period, the first period is the period in the first PRACH configuration, and the second period is the period in the last activated PRACH configuration; the first period is 1 / N1 of the second period, where N1 is a positive integer; the first period is N2 times the second period, where N2 is a positive integer; the first period is the result of increasing the first ratio by the second period; the first period is the result of reducing the second ratio by the second period.

[0095] In some implementations, the first information is carried in an RRC message or system information; and / or the second information is carried in an RRC message, system information, MAC CE or DCI.

[0096] In some implementations, the transceiver unit 410 is further used to: receive a basic PRACH configuration sent by the network device, the basic PRACH configuration includes a basic period for PRACH transmission, and the one or more PRACH configurations include a period different from the basic PRACH period.

[0097] In some implementations, the period in the one or more PRACH configurations is smaller than the basic PRACH period.

[0098] In some implementations, the period in the one or more PRACH configurations is 1 / 2 of the basic period. M , wherein the value of M associated with the period in the one or more PRACH configurations is different, and M is a positive integer.

[0099] In some implementations, the basic PRACH configuration is carried in an RRC message or system information.

[0100] In some implementations, there is a first mapping relationship between the RO determined based on each PRACH configuration in the one or more PRACH configurations and the synchronization signal broadcast channel block SSB, and there is a second mapping relationship between the RO determined based on the basic PRACH configuration and the SSB.

[0101] In some implementations, the RO in the first mapping relationship does not overlap with the RO in the second mapping relationship; or, the RO in the first mapping relationship at least partially overlaps with the RO in the second mapping relationship.

[0102] In some implementations, when the ROs associated with the same SSB in the first mapping relationship and the second mapping relationship are different, the RO associated with the same SSB in the first mapping relationship is used for PRACH transmission of the terminal device.

[0103] In some implementations, the RO determined based on each of the one or more PRACH configurations and the RO determined based on the basic PRACH configuration have a third mapping relationship with the SSB.

[0104] It can be understood that the transceiver unit 410 can be, for example, a transceiver 630. In addition, optionally, the terminal device 400 further includes a processor 610 and a memory 620, for details, see Figure 6 .

[0105] Figure 5 A schematic diagram of the structure of a network device provided in an embodiment of the present application. Figure 5 The network device 500 shown may include a transceiver unit 510. The transceiver unit 510 is configured to send first information to a terminal device, wherein the first information includes one or more PRACH configurations.

[0106] In some implementations, the PRACH configuration includes one or more of the following parameters: an index of the PRACH configuration; a period of the PRACH resources; a subframe number corresponding to the PRACH time slot; the number of PRACH time slots; the number of ROs in the PRACH time slot; the RO interval; the PRACH frame offset; information on a combination of the PRACH frame offset and period; and an offset of the index of the PRACH configuration relative to the index of the base PRACH configuration.

[0107] In some implementations, the transceiver unit 510 is also used to: send second information to the terminal device, the second information is used to activate the first PRACH configuration among the one or more PRACH configurations, or the second information is used to indicate adjustment of parameters in the PRACH configuration used by the terminal device, or the second information is used to indicate whether to adjust the parameters in the PRACH configuration used by the terminal device.

[0108] In some implementations, the second information includes one or more of the following: an index of the first PRACH configuration; information about the adjusted period; information about the adjusted RO interval; information about the adjusted PRACH frame offset; information about a combination of the adjusted PRACH frame offset and period; information indicating an increase in the period of PRACH resources; information indicating a decrease in the period of PRACH resources; information indicating an increase in the RO interval; information indicating a decrease in the RO interval; an offset of the index of the first PRACH configuration relative to the index of the basic PRACH configuration; an offset between the adjusted period and a specific period; an offset between the adjusted PRACH frame offset and a specific PRACH frame offset.

[0109] In some implementations, the index of the first PRACH configuration is one of the indexes of multiple PRACH configurations associated with the first preamble format, and the index of the first PRACH configuration is the sequence number of the first PRACH configuration obtained by reordering the indexes of the multiple PRACH configurations; and / or, the adjusted period is one of the multiple periods associated with the first preamble format, and the information of the adjusted period is the sequence number of the adjusted period obtained after the multiple periods are reordered; and / or, the adjusted period is one of the multiple periods associated with the first preamble format and the frame offset in the second PRACH configuration, and the information of the adjusted period is the sequence number of the adjusted period obtained after the multiple periods are reordered; and / or, the adjusted PRACH frame offset is one of the multiple PRACH frame offsets associated with the first preamble format, and the adjusted PRACH frame offset is one of the multiple PRACH frame offsets associated with the first preamble format. The information of PRACH frame offset is the serial number of the adjusted PRACH frame offset obtained after reordering the multiple PRACH frame offsets; and / or, the adjusted PRACH frame offset is one of the multiple PRACH frame offsets associated with the first preamble format and the period in the second PRACH configuration, and the information of the adjusted PRACH frame offset is the serial number of the adjusted PRACH frame offset obtained after reordering the multiple PRACH frame offsets; and / or, the combination of the adjusted period and the PRACH frame offset is one of the multiple combinations of the period and the PRACH frame offset associated with the first preamble format, and the information of the combination of the adjusted period and the PRACH frame offset is the serial number of the combination of the adjusted period and the PRACH frame offset obtained after reordering the multiple combinations; wherein, the first preamble format is a preamble format associated with the index of the basic PRACH configuration.

[0110] In some implementations, the second PRACH configuration includes: a basic PRACH configuration sent by a network device to a terminal device; or a PRACH configuration currently used by the terminal device.

[0111] In some implementations, the index of the first PRACH configuration is adjacent to the index of the second PRACH configuration, and the second PRACH configuration is the last activated PRACH configuration; the index of the first period is adjacent to the index of the second period, the first period is the period in the first PRACH configuration, and the second period is the period in the last activated PRACH configuration; the first period is 1 / N1 of the second period, where N1 is a positive integer; the first period is N2 times the second period, where N2 is a positive integer; the first period is the result of increasing the first ratio by the second period; the first period is the result of reducing the second ratio by the second period.

[0112] In some implementations, the first information is carried in an RRC message or system information; and / or the second information is carried in an RRC message, system information, MAC CE or DCI.

[0113] In some implementations, the transceiver unit 510 is further used to: send a basic PRACH configuration to the terminal device, the basic PRACH configuration includes a basic period for PRACH transmission, and the one or more PRACH configurations include a period different from the basic PRACH period.

[0114] In some implementations, the period in the one or more PRACH configurations is smaller than the basic PRACH period.

[0115] In some implementations, the period in the one or more PRACH configurations is 1 / 2 of the basic period. M , wherein the value of M associated with the period in the one or more PRACH configurations is different, and M is a positive integer.

[0116] In some implementations, the basic PRACH configuration is carried in an RRC message or system information.

[0117] In some implementations, there is a first mapping relationship between the RO determined based on each PRACH configuration in the one or more PRACH configurations and the synchronization signal broadcast channel block SSB, and there is a second mapping relationship between the RO determined based on the basic PRACH configuration and the SSB.

[0118] In some implementations, the RO in the first mapping relationship does not overlap with the RO in the second mapping relationship; or, the RO in the first mapping relationship at least partially overlaps with the RO in the second mapping relationship.

[0119] In some implementations, when the ROs associated with the same SSB in the first mapping relationship and the second mapping relationship are different, the RO associated with the same SSB in the first mapping relationship is used for PRACH transmission of the terminal device.

[0120] In some implementations, the RO determined based on each of the one or more PRACH configurations and the RO determined based on the basic PRACH configuration have a third mapping relationship with the SSB.

[0121] It can be understood that the transceiver unit 510 can be, for example, a transceiver 630. In addition, optionally, the network device 500 further includes a processor 610 and a memory 620, for details, see Figure 6 .

[0122] Figure 6 It is a schematic structural diagram of a device for communication according to an embodiment of the present application. Figure 6 The dotted line shown in indicates that the unit or module is optional. The apparatus 600 may be used to implement the method described in the above method embodiment. The apparatus 600 may be, for example, a chip, a terminal device or a network device.

[0123] The device 600 may include one or more processors 610. The processor 610 may support the device 600 to implement the method described in the aforementioned method embodiment. The processor 610 may be a general-purpose processor or a special-purpose processor. For example, the processor 610 may be a central processing unit (CPU). Alternatively, the processor 610 may also be other general-purpose processors, digital signal processors (DSP), application specific integrated circuits (ASIC), field programmable gate arrays (FPGA) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. The general-purpose processor may be a microprocessor or may be any conventional processor, etc.

[0124] The apparatus 600 may further include one or more memories 620. The memory 620 stores a program, which can be executed by the processor 610, so that the processor 610 executes the method described in the above method embodiment. The memory 620 may be independent of the processor 610, or may be integrated in the processor 610.

[0125] The apparatus 600 may further include a transceiver 630. The processor 610 may communicate with other devices or chips through the transceiver 630. For example, the processor 610 may transmit and receive data with other devices or chips through the transceiver 630.

[0126] The embodiment of the present application also provides a communication system. The communication system includes the above-mentioned terminal device and network device. In some implementations, the system also includes other devices that interact with the terminal device and the network device.

[0127] The present application also provides a computer-readable storage medium for storing a program. The computer-readable storage medium can be applied to a terminal device or a network device provided in the present application, and the program enables a computer to execute the method performed by the terminal device or the network device in each embodiment of the present application.

[0128] The embodiment of the present application also provides a computer program product. The computer program product includes a program. The computer program product can be applied to the terminal device or network device provided in the embodiment of the present application, and the program enables the computer to execute the method performed by the terminal device or network device in each embodiment of the present application.

[0129] The embodiment of the present application also provides a computer program. The computer program can be applied to the terminal device or network device provided in the embodiment of the present application, and the computer program enables a computer to execute the method executed by the terminal device or network device in each embodiment of the present application.

[0130] It should be understood that the terms "system" and "network" in the embodiments of the present application can be used interchangeably. In addition, the terms used in the present application are only used to explain the specific embodiments of the present application, and are not intended to limit the present application. The terms "first", "second", "third" and "fourth" in the specification and claims of the present application and the accompanying drawings are used to distinguish different objects, rather than to describe a specific order. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions.

[0131] In the embodiments of the present application, the "indication" mentioned can be a direct indication, an indirect indication, or an indication of an association relationship. For example, A indicates B, which can mean that A directly indicates B, for example, B can be obtained through A; it can also mean that A indirectly indicates B, for example, A indicates C, and B can be obtained through C; it can also mean that there is an association relationship between A and B.

[0132] In the embodiment of the present application, "B corresponding to A" means that B is associated with A, and B can be determined according to A. However, it should be understood that determining B according to A does not mean determining B only according to A, and B can also be determined according to A and / or other information.

[0133] In the embodiments of the present application, the term "corresponding" may indicate that there is a direct or indirect correspondence between the two, or an association relationship between the two, or a relationship of indication and being indicated, configuration and being configured, etc.

[0134] In the embodiments of the present application, "pre-definition" or "pre-configuration" can be implemented by pre-saving corresponding codes, tables or other methods that can be used to indicate relevant information in a device (for example, including a terminal device and a network device), and the present application does not limit the specific implementation method. For example, pre-definition can refer to what is defined in the protocol.

[0135] In the embodiments of the present application, the “protocol” may refer to a standard protocol in the communication field, for example, it may include an LTE protocol, an NR protocol, and related protocols used in future communication systems, and the present application does not limit this.

[0136] In the embodiments of the present application, the term "and / or" is only a description of the association relationship of the associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0137] In various embodiments of the present application, the size of the serial numbers of the above-mentioned processes does not mean the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of the present application.

[0138] In the several embodiments provided in the present application, it should be understood that the disclosed systems, devices and methods can be implemented in other ways. For example, the device embodiments described above are only schematic. For example, the division of the units is only a logical function division. There may be other division methods in actual implementation, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of devices or units, which can be electrical, mechanical or other forms.

[0139] The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0140] In addition, each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit.

[0141] In the above embodiments, it can be implemented in whole or in part by software, hardware, firmware or any combination thereof. When implemented using software, it can be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on a computer, the process or function described in the embodiment of the present application is generated in whole or in part. The computer may be a general-purpose computer, a special-purpose computer, a computer network, or other programmable device. The computer instructions may be stored in a computer-readable storage medium, or transmitted from one computer-readable storage medium to another computer-readable storage medium, for example, the computer instructions may be transmitted from a website site, computer, server or data center by wired (e.g., coaxial cable, optical fiber, digital subscriber line (digital subscriber line, DSL)) or wireless (e.g., infrared, wireless, microwave, etc.) mode to another website site, computer, server or data center. The computer-readable storage medium may be any available medium that can be read by a computer or a data storage device such as a server or data center that includes one or more available media integrated. The available medium may be a magnetic medium (eg, a floppy disk, a hard disk, a magnetic tape), an optical medium (eg, a digital video disc (DVD)), or a semiconductor medium (eg, a solid state disk (SSD)).

[0142] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art who is familiar with the present technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

Claims

1. A wireless communication method, characterized in that: include: The terminal device receives first information sent by the network device, wherein the first information includes one or more physical random access channel PRACH configurations.

2. The method according to claim 1, characterized in that The PRACH configuration includes one or more of the following parameters: The index of the PRACH configuration; The period of PRACH resources; The subframe number corresponding to the PRACH time slot; The number of PRACH time slots; The number of random access channel opportunities RO in the PRACH time slot; RO interval; PRACH frame offset; Information on the combination of PRACH frame offset and period; The offset of the index of the PRACH configuration relative to the index of the base PRACH configuration.

3. The method according to claim 1 or 2, characterized in that: The method further comprises: The terminal device receives second information sent by the network device, where the second information is used to activate a first PRACH configuration among the one or more PRACH configurations, or the second information is used to indicate adjustment of parameters in the PRACH configuration used by the terminal device, or the second information is used to indicate whether to adjust parameters in the PRACH configuration used by the terminal device.

4. The method according to claim 3, characterized in that The second information includes one or more of the following: an index of the first PRACH configuration; Information on the adjusted period; Information about the adjusted RO interval; Information of the adjusted PRACH frame offset; Information about the adjusted combination of PRACH frame offset and period; Increase the indication information of the period of PRACH resources; Indication information for reducing the period of PRACH resources; Add the indication information of RO interval; Instructions for reducing the RO interval; an offset of an index of the first PRACH configuration relative to an index of a basic PRACH configuration; the offset between the adjusted period and the specified period; The offset between the adjusted PRACH frame offset and the specified PRACH frame offset.

5. The method according to claim 4, characterized in that The index of the first PRACH configuration is one of the indexes of multiple PRACH configurations associated with the first preamble format, and the index of the first PRACH configuration is a sequence number of the first PRACH configuration obtained by reordering the indexes of the multiple PRACH configurations; and / or, The adjusted period is one of a plurality of periods associated with the first preamble format, and the information of the adjusted period is a sequence number of the adjusted period obtained after the plurality of periods are reordered; and / or, The adjusted period is one of a plurality of periods associated with the frame offset in the first preamble format and the second PRACH configuration, and the information of the adjusted period is a sequence number of the adjusted period obtained after reordering the plurality of periods; and / or, The adjusted PRACH frame offset is one of multiple PRACH frame offsets associated with the first preamble format, and the information of the adjusted PRACH frame offset is a sequence number of the adjusted PRACH frame offset obtained after reordering the multiple PRACH frame offsets; and / or, The adjusted PRACH frame offset is one of multiple PRACH frame offsets associated with the period in the first preamble format and the second PRACH configuration, and the information of the adjusted PRACH frame offset is a sequence number of the adjusted PRACH frame offset obtained after reordering the multiple PRACH frame offsets; and / or, The adjusted combination of the period and the PRACH frame offset is one of multiple combinations of the period and the PRACH frame offset associated with the first preamble format, and the information of the adjusted combination of the period and the PRACH frame offset is a sequence number of the combination of the adjusted period and the PRACH frame offset obtained after reordering the multiple combinations; The first preamble format is a preamble format associated with an index of a basic PRACH configuration.

6. The method according to claim 5, characterized in that The second PRACH configuration includes: a basic PRACH configuration sent by a network device to a terminal device; or a PRACH configuration currently used by the terminal device.

7. The method according to any one of claims 3 to 6, characterized in that The index of the first PRACH configuration is adjacent to the index of the second PRACH configuration, and the second PRACH configuration is the last activated PRACH configuration; The index of the first period is adjacent to the index of the second period, the first period is a period in the first PRACH configuration, and the second period is a period in the last activated PRACH configuration; The first period is 1 / N1 of the second period, where N1 is a positive integer; The first period is N2 times the second period, where N2 is a positive integer; The first cycle is a result of increasing the first ratio by the second cycle; The first period is the result of reducing the second period by a second ratio.

8. The method according to any one of claims 3 to 7, characterized in that The first information is carried in a radio resource control RRC message or system information; and / or, The second information is carried in an RRC message, system information, a media access control element MAC CE or downlink control information DCI.

9. The method according to any one of claims 1 to 8, characterized in that The method further comprises: The terminal device receives a basic PRACH configuration sent by the network device, where the basic PRACH configuration includes a basic period for PRACH transmission, and the one or more PRACH configurations include a period different from the basic PRACH period.

10. The method according to claim 9, characterized in that The period in the one or more PRACH configurations is smaller than the basic PRACH period.

11. The method according to claim 10, characterized in that The period in the one or more PRACH configurations is 1 / 2 of the basic period M , wherein the value of M associated with the period in the one or more PRACH configurations is different, and M is a positive integer.

12. The method according to any one of claims 9 to 11, characterized in that The basic PRACH configuration is carried in an RRC message or system information.

13. The method according to any one of claims 9 to 12, characterized in that There is a first mapping relationship between the RO determined based on each PRACH configuration in the one or more PRACH configurations and the synchronization signal broadcast channel block SSB, and there is a second mapping relationship between the RO determined based on the basic PRACH configuration and the SSB.

14. The method according to claim 13, characterized in that There is no overlap between the RO in the first mapping relationship and the RO in the second mapping relationship; or, The RO in the first mapping relationship and the RO in the second mapping relationship at least partially overlap.

15. The method according to claim 13 or 14, characterized in that When the ROs associated with the same SSB in the first mapping relationship and the second mapping relationship are different, the RO associated with the same SSB in the first mapping relationship is used for PRACH transmission of the terminal device.

16. The method according to any one of claims 9 to 12, characterized in that The RO determined based on each of the one or more PRACH configurations and the RO determined based on the basic PRACH configuration have a third mapping relationship with the SSB.

17. A wireless communication method, characterized in that: include: The network device sends first information to the terminal device, wherein the first information includes one or more physical random access channel PRACH configurations.

18. The method according to claim 17, characterized in that The PRACH configuration includes one or more of the following parameters: The index of the PRACH configuration; The period of PRACH resources; The subframe number corresponding to the PRACH time slot; The number of PRACH time slots; The number of random access channel opportunities RO in the PRACH time slot; RO interval; PRACH frame offset; Information on the combination of PRACH frame offset and period; The offset of the index of the PRACH configuration relative to the index of the base PRACH configuration.

19. The method according to claim 17 or 18, characterized in that The method further comprises: The network device sends second information to the terminal device, where the second information is used to activate a first PRACH configuration among the one or more PRACH configurations, or the second information is used to indicate adjustment of parameters in the PRACH configuration used by the terminal device, or the second information is used to indicate whether to adjust parameters in the PRACH configuration used by the terminal device.

20. The method according to claim 19, characterized in that The second information includes one or more of the following: an index of the first PRACH configuration; Information on the adjusted period; Information about the adjusted RO interval; Information of the adjusted PRACH frame offset; Information about the adjusted combination of PRACH frame offset and period; Increase the indication information of the period of PRACH resources; Indication information for reducing the period of PRACH resources; Add the indication information of RO interval; Instructions for reducing the RO interval; an offset of an index of the first PRACH configuration relative to an index of a basic PRACH configuration; the offset between the adjusted period and the specified period; The offset between the adjusted PRACH frame offset and the specified PRACH frame offset.

21. The method according to claim 19 or 20, characterized in that The index of the first PRACH configuration is one of the indexes of multiple PRACH configurations associated with the first preamble format, and the index of the first PRACH configuration is a sequence number of the first PRACH configuration obtained by reordering the indexes of the multiple PRACH configurations; and / or, The adjusted period is one of a plurality of periods associated with the first preamble format, and the information of the adjusted period is a sequence number of the adjusted period obtained after the plurality of periods are reordered; and / or, The adjusted period is one of a plurality of periods associated with the frame offset in the first preamble format and the second PRACH configuration, and the information of the adjusted period is a sequence number of the adjusted period obtained after reordering the plurality of periods; and / or, The adjusted PRACH frame offset is one of multiple PRACH frame offsets associated with the first preamble format, and the information of the adjusted PRACH frame offset is a sequence number of the adjusted PRACH frame offset obtained after reordering the multiple PRACH frame offsets; and / or, The adjusted PRACH frame offset is one of multiple PRACH frame offsets associated with the period in the first preamble format and the second PRACH configuration, and the information of the adjusted PRACH frame offset is a sequence number of the adjusted PRACH frame offset obtained after reordering the multiple PRACH frame offsets; and / or, The adjusted combination of the period and the PRACH frame offset is one of multiple combinations of the period and the PRACH frame offset associated with the first preamble format, and the information of the adjusted combination of the period and the PRACH frame offset is a sequence number of the combination of the adjusted period and the PRACH frame offset obtained after reordering the multiple combinations; The first preamble format is a preamble format associated with an index of a basic PRACH configuration.

22. The method according to claim 21, characterized in that The second PRACH configuration includes: a basic PRACH configuration sent by a network device to a terminal device; or a PRACH configuration currently used by the terminal device.

23. The method according to any one of claims 20 to 22, characterized in that The index of the first PRACH configuration is adjacent to the index of the second PRACH configuration, and the second PRACH configuration is the last activated PRACH configuration; The index of the first period is adjacent to the index of the second period, the first period is a period in the first PRACH configuration, and the second period is a period in the last activated PRACH configuration; The first period is 1 / N1 of the second period, where N1 is a positive integer; The first period is N2 times the second period, where N2 is a positive integer; The first cycle is a result of increasing the first ratio by the second cycle; The first period is the result of reducing the second period by a second ratio.

24. The method according to any one of claims 20 to 23, characterized in that The first information is carried in a radio resource control RRC message or system information; and / or, The second information is carried in an RRC message, system information, a media access control element MAC CE or downlink control information DCI.

25. The method according to any one of claims 18 to 24, characterized in that The method further comprises: The network device sends a basic PRACH configuration to the terminal device, where the basic PRACH configuration includes a basic period for PRACH transmission, and the one or more PRACH configurations include a period different from the basic PRACH period.

26. The method according to claim 25, characterized in that The period in the one or more PRACH configurations is smaller than the basic PRACH period.

27. The method according to claim 26, characterized in that The period in the one or more PRACH configurations is 1 / 2 of the basic period M , wherein the value of M associated with the period in the one or more PRACH configurations is different, and M is a positive integer.

28. The method according to any one of claims 25 to 27, characterized in that The basic PRACH configuration is carried in an RRC message or system information.

29. The method according to any one of claims 25 to 28, characterized in that There is a first mapping relationship between the RO determined based on each PRACH configuration in the one or more PRACH configurations and the synchronization signal broadcast channel block SSB, and there is a second mapping relationship between the RO determined based on the basic PRACH configuration and the SSB.

30. The method according to claim 29, characterized in that There is no overlap between the RO in the first mapping relationship and the RO in the second mapping relationship; or, The RO in the first mapping relationship and the RO in the second mapping relationship at least partially overlap.

31. The method according to claim 29 or 30, characterized in that When the ROs associated with the same SSB in the first mapping relationship and the second mapping relationship are different, the RO associated with the same SSB in the first mapping relationship is used for PRACH transmission of the terminal device.

32. The method according to any one of claims 25 to 28, characterized in that The RO determined based on each of the one or more PRACH configurations and the RO determined based on the basic PRACH configuration have a third mapping relationship with the SSB.

33. A terminal device, characterized in that: include: The transceiver unit is used to receive first information sent by a network device, wherein the first information includes one or more physical random access channel PRACH configurations.

34. The terminal device according to claim 33, characterized in that: The PRACH configuration includes one or more of the following parameters: The index of the PRACH configuration; The period of PRACH resources; The subframe number corresponding to the PRACH time slot; The number of PRACH time slots; The number of random access channel opportunities RO in the PRACH time slot; RO interval; PRACH frame offset; Information on the combination of PRACH frame offset and period; The offset of the index of the PRACH configuration relative to the index of the base PRACH configuration.

35. The terminal device according to claim 33 or 34, characterized in that: The transceiver unit is also used for: Receive second information sent by the network device, where the second information is used to activate a first PRACH configuration among the one or more PRACH configurations, or the second information is used to indicate adjustment of parameters in the PRACH configuration used by the terminal device, or the second information is used to indicate whether to adjust parameters in the PRACH configuration used by the terminal device.

36. The terminal device according to claim 35, characterized in that: The second information includes one or more of the following: an index of the first PRACH configuration; Information on the adjusted period; Information about the adjusted RO interval; Information of the adjusted PRACH frame offset; Information about the adjusted combination of PRACH frame offset and period; Increase the indication information of the period of PRACH resources; Indication information for reducing the period of PRACH resources; Add the indication information of RO interval; Instructions for reducing the RO interval; an offset of an index of the first PRACH configuration relative to an index of a basic PRACH configuration; the offset between the adjusted period and the specified period; The offset between the adjusted PRACH frame offset and the specified PRACH frame offset.

37. The terminal device according to claim 35 or 36, characterized in that: The index of the first PRACH configuration is one of the indexes of multiple PRACH configurations associated with the first preamble format, and the index of the first PRACH configuration is a sequence number of the first PRACH configuration obtained by reordering the indexes of the multiple PRACH configurations; and / or, The adjusted period is one of a plurality of periods associated with the first preamble format, and the information of the adjusted period is a sequence number of the adjusted period obtained after the plurality of periods are reordered; and / or, The adjusted period is one of a plurality of periods associated with the frame offset in the first preamble format and the second PRACH configuration, and the information of the adjusted period is a sequence number of the adjusted period obtained after reordering the plurality of periods; and / or, The adjusted PRACH frame offset is one of multiple PRACH frame offsets associated with the first preamble format, and the information of the adjusted PRACH frame offset is a sequence number of the adjusted PRACH frame offset obtained after reordering the multiple PRACH frame offsets; and / or, The adjusted PRACH frame offset is one of multiple PRACH frame offsets associated with the period in the first preamble format and the second PRACH configuration, and the information of the adjusted PRACH frame offset is a sequence number of the adjusted PRACH frame offset obtained after reordering the multiple PRACH frame offsets; and / or, The adjusted combination of the period and the PRACH frame offset is one of multiple combinations of the period and the PRACH frame offset associated with the first preamble format, and the information of the adjusted combination of the period and the PRACH frame offset is a sequence number of the combination of the adjusted period and the PRACH frame offset obtained after reordering the multiple combinations; The first preamble format is a preamble format associated with an index of a basic PRACH configuration.

38. The terminal device according to claim 37, characterized in that: The second PRACH configuration includes: a basic PRACH configuration sent by a network device to a terminal device; or a PRACH configuration currently used by the terminal device.

39. The terminal device according to any one of claims 35 to 37, characterized in that: The index of the first PRACH configuration is adjacent to the index of the second PRACH configuration, and the second PRACH configuration is the last activated PRACH configuration; The index of the first period is adjacent to the index of the second period, the first period is a period in the first PRACH configuration, and the second period is a period in the last activated PRACH configuration; The first period is 1 / N1 of the second period, where N1 is a positive integer; The first period is N2 times the second period, where N2 is a positive integer; The first cycle is a result of increasing the first ratio by the second cycle; The first period is the result of reducing the second period by a second ratio.

40. The terminal device according to any one of claims 35 to 39, characterized in that: The first information is carried in a radio resource control RRC message or system information; and / or, The second information is carried in an RRC message, system information, a media access control element MAC CE or downlink control information DCI.

41. The terminal device according to any one of claims 33 to 40, characterized in that: The transceiver unit is also used for: A basic PRACH configuration sent by the network device is received, where the basic PRACH configuration includes a basic period for PRACH transmission, and the one or more PRACH configurations include a period different from the basic PRACH period.

42. The terminal device according to claim 41, characterized in that: The period in the one or more PRACH configurations is smaller than the basic PRACH period.

43. The terminal device according to claim 42, characterized in that: The period in the one or more PRACH configurations is 1 / 2 of the basic period M , wherein the value of M associated with the period in the one or more PRACH configurations is different, and M is a positive integer.

44. The terminal device according to any one of claims 41 to 43, characterized in that: The basic PRACH configuration is carried in an RRC message or system information.

45. The terminal device according to any one of claims 41 to 44, characterized in that: There is a first mapping relationship between the RO determined based on each PRACH configuration in the one or more PRACH configurations and the synchronization signal broadcast channel block SSB, and there is a second mapping relationship between the RO determined based on the basic PRACH configuration and the SSB.

46. ​​The terminal device according to claim 45, characterized in that: There is no overlap between the RO in the first mapping relationship and the RO in the second mapping relationship; or, The RO in the first mapping relationship and the RO in the second mapping relationship at least partially overlap.

47. The terminal device according to claim 45 or 46, characterized in that: When the ROs associated with the same SSB in the first mapping relationship and the second mapping relationship are different, the RO associated with the same SSB in the first mapping relationship is used for PRACH transmission of the terminal device.

48. The terminal device according to any one of claims 41 to 47, characterized in that: The RO determined based on each of the one or more PRACH configurations and the RO determined based on the basic PRACH configuration have a third mapping relationship with the SSB.

49. A network device, characterized in that: include: A transceiver unit is used to send first information to a terminal device, wherein the first information includes one or more physical random access channel PRACH configurations.

50. The network device according to claim 49, characterized in that The PRACH configuration includes one or more of the following parameters: The index of the PRACH configuration; The period of PRACH resources; The subframe number corresponding to the PRACH time slot; The number of PRACH time slots; The number of random access channel opportunities RO in the PRACH time slot; RO interval; PRACH frame offset; Information on the combination of PRACH frame offset and period; The offset of the index of the PRACH configuration relative to the index of the base PRACH configuration.

51. The network device according to claim 49 or 50, characterized in that: The transceiver unit is also used for: Sending second information to the terminal device, the second information is used to activate the first PRACH configuration among the one or more PRACH configurations, or the second information is used to indicate adjustment of parameters in the PRACH configuration used by the terminal device, or the second information is used to indicate whether to adjust the parameters in the PRACH configuration used by the terminal device.

52. The network device according to claim 51, characterized in that The second information includes one or more of the following: an index of the first PRACH configuration; Information on the adjusted period; Information about the adjusted RO interval; Information of the adjusted PRACH frame offset; Information about the adjusted combination of PRACH frame offset and period; Increase the indication information of the period of PRACH resources; Indication information for reducing the period of PRACH resources; Add the indication information of RO interval; Instructions for reducing the RO interval; an offset of an index of the first PRACH configuration relative to an index of a basic PRACH configuration; the offset between the adjusted period and the specified period; The offset between the adjusted PRACH frame offset and the specified PRACH frame offset.

53. The network device according to claim 51 or 52, characterized in that: The index of the first PRACH configuration is one of the indexes of multiple PRACH configurations associated with the first preamble format, and the index of the first PRACH configuration is a sequence number of the first PRACH configuration obtained by reordering the indexes of the multiple PRACH configurations; and / or, The adjusted period is one of a plurality of periods associated with the first preamble format, and the information of the adjusted period is a sequence number of the adjusted period obtained after the plurality of periods are reordered; and / or, The adjusted period is one of a plurality of periods associated with the frame offset in the first preamble format and the second PRACH configuration, and the information of the adjusted period is a sequence number of the adjusted period obtained after reordering the plurality of periods; and / or, The adjusted PRACH frame offset is one of multiple PRACH frame offsets associated with the first preamble format, and the information of the adjusted PRACH frame offset is a sequence number of the adjusted PRACH frame offset obtained after reordering the multiple PRACH frame offsets; and / or, The adjusted PRACH frame offset is one of multiple PRACH frame offsets associated with the period in the first preamble format and the second PRACH configuration, and the information of the adjusted PRACH frame offset is a sequence number of the adjusted PRACH frame offset obtained after reordering the multiple PRACH frame offsets; and / or, The adjusted combination of the period and the PRACH frame offset is one of multiple combinations of the period and the PRACH frame offset associated with the first preamble format, and the information of the adjusted combination of the period and the PRACH frame offset is a sequence number of the combination of the adjusted period and the PRACH frame offset obtained after reordering the multiple combinations; The first preamble format is a preamble format associated with an index of a basic PRACH configuration.

54. The network device according to claim 53, characterized in that The second PRACH configuration includes: a basic PRACH configuration sent by a network device to a terminal device; or a PRACH configuration currently used by the terminal device.

55. The network device according to any one of claims 51 to 54, characterized in that: The index of the first PRACH configuration is adjacent to the index of the second PRACH configuration, and the second PRACH configuration is the last activated PRACH configuration; The index of the first period is adjacent to the index of the second period, the first period is a period in the first PRACH configuration, and the second period is a period in the last activated PRACH configuration; The first period is 1 / N1 of the second period, where N1 is a positive integer; The first period is N2 times the second period, where N2 is a positive integer; The first cycle is a result of increasing the first ratio by the second cycle; The first period is the result of reducing the second period by a second ratio.

56. The network device according to any one of claims 51 to 55, characterized in that: The first information is carried in a radio resource control RRC message or system information; and / or, The second information is carried in an RRC message, system information, a media access control element MAC CE or downlink control information DCI.

57. The network device according to any one of claims 49 to 56, characterized in that: The transceiver unit is also used for: A basic PRACH configuration is sent to the terminal device, where the basic PRACH configuration includes a basic period for PRACH transmission, and the one or more PRACH configurations include a period different from the basic PRACH period.

58. The network device according to claim 57, characterized in that: The period in the one or more PRACH configurations is smaller than the basic PRACH period.

59. The network device according to claim 58, characterized in that The period in the one or more PRACH configurations is 1 / 2 of the basic period M , wherein the value of M associated with the period in the one or more PRACH configurations is different, and M is a positive integer.

60. The network device according to any one of claims 57 to 59, characterized in that: The basic PRACH configuration is carried in an RRC message or system information.

61. The network device according to any one of claims 57 to 60, characterized in that: There is a first mapping relationship between the RO determined based on each PRACH configuration in the one or more PRACH configurations and the synchronization signal broadcast channel block SSB, and there is a second mapping relationship between the RO determined based on the basic PRACH configuration and the SSB.

62. The network device according to claim 61, characterized in that There is no overlap between the RO in the first mapping relationship and the RO in the second mapping relationship; or, The RO in the first mapping relationship and the RO in the second mapping relationship at least partially overlap.

63. The network device according to claim 61 or 62, characterized in that: When the ROs associated with the same SSB in the first mapping relationship and the second mapping relationship are different, the RO associated with the same SSB in the first mapping relationship is used for PRACH transmission of the terminal device.

64. The network device according to any one of claims 57 to 60, characterized in that: The RO determined based on each of the one or more PRACH configurations and the RO determined based on the basic PRACH configuration have a third mapping relationship with the SSB.

65. A terminal device, characterized in that: It comprises a transceiver, a memory and a processor, wherein the memory is used to store programs, and the processor is used to call the programs in the memory and control the transceiver to receive or send signals so that the terminal device executes the method according to any one of claims 1 to 16.

66. A network device, characterized in that: It comprises a transceiver, a memory and a processor, wherein the memory is used to store programs, and the processor is used to call the programs in the memory and control the transceiver to receive or send signals so that the network device executes the method according to any one of claims 17 to 32.

67. A device, characterized in that The device comprises a processor, configured to call a program from a memory so as to enable the device to execute the method according to any one of claims 1 to 32.

68. A chip, characterized in that: The device comprises a processor, configured to call a program from a memory, so that a device equipped with the chip executes a method according to any one of claims 1 to 32.

69. A computer-readable storage medium, characterized in that A program is stored thereon, the program causing a computer to execute the method according to any one of claims 1 to 32.

70. A computer program product, characterized in that A program is included, which causes a computer to execute the method according to any one of claims 1 to 32.

71. A computer program, characterized in that The computer program causes a computer to execute the method according to any one of claims 1 to 32.

Images