Communication method, computer readable storage medium and communication device

Abstract

The invention discloses a communication method, a computer readable storage medium and a communication device, and relates to the technical field of communication. The method comprises: receiving configuration information, the configuration information comprising at least two sets of PRACH resource configurations, a first set of PRACH resource configurations in the at least two sets of PRACH resource configurations corresponding to a first PRACH format, and a second set of PRACH resource configurations in the at least two sets of PRACH resource configurations corresponding to a second PRACH format; and sending the random access lead code by using the target PRACH resource configuration, wherein the target PRACH resource configuration is one set of PRACH resource configuration in the at least two sets of PRACH resource configurations. According to the scheme provided by the invention, the terminal equipment can access by using a proper PRACH format in different random access scenes.

Description

Technical Field

[0001] The present application relates to the field of communication technology, and in particular to a communication method, a computer-readable storage medium, and a communication device. Background Art

[0002] In the scenario where the time-frequency offset changes rapidly, some terminal devices can perform time-frequency offset pre-compensation during the access process, but some terminal devices cannot perform time-frequency offset pre-compensation during the access process. For terminal devices that cannot perform time-frequency offset pre-compensation, dedicated physical random access channel (PRACH) resources are required to complete the access process. Therefore, for this scenario, how network devices configure PRACH resources is a problem that needs to be solved at present. Summary of the invention

[0003] The present application provides a communication method, a computer-readable storage medium, and a communication device, which can not only ensure uplink synchronization of a terminal device during an access process, but also reduce unnecessary PRACH resource overhead and detection energy consumption of a network device.

[0004] In a first aspect, an embodiment of the present application provides a communication method, the method comprising: receiving configuration information, the configuration information comprising at least two sets of PRACH resource configurations, a first set of PRACH resource configurations in the at least two sets of PRACH resource configurations corresponding to a first PRACH format, and a second set of PRACH resource configurations in the at least two sets of PRACH resource configurations corresponding to a second PRACH format; using a target PRACH resource configuration to send a random access preamble code, the target PRACH resource configuration being a set of PRACH resource configurations in the at least two sets of PRACH resource configurations.

[0005] In the above scheme, the network device configures two or more sets of PRACH resources for the terminal device, where different PRACH resource configurations correspond to different PRACH formats. Since different PRACH formats have different tolerances to time deviation and frequency deviation, the terminal device has the opportunity to use appropriate PRACH resources to send a random access preamble to ensure uplink synchronization, which can not only meet the needs of random access, but also reduce the PRACH resource overhead and the detection energy consumption of the network device.

[0006] Optionally, the time domain width occupied by the PRACH resources in the first set of PRACH resources is greater than the time domain width occupied by the PRACH resources in the second set of PRACH resources, and / or the frequency domain width occupied by the PRACH resources in the first set of PRACH resources is greater than the frequency domain width occupied by the PRACH resources in the second set of PRACH resources; wherein the first set of PRACH resources refers to a set of PRACH resources configured by the first set of PRACH resources configuration, and the second set of PRACH resources refers to a set of PRACH resources configured by the second set of PRACH resources configuration.

[0007] Optionally, the first set of PRACH resource configurations is used for random access in an RRC non-connected state, and the second set of PRACH resource configurations is used for an access process in an RRC connected state.

[0008] Optionally, the method further includes: receiving first indication information, where the first indication information is used to indicate the target PRACH resource configuration.

[0009] Optionally, the receiving the first indication information includes: receiving MAC CE signaling, the MAC CE signaling including the first indication information; or receiving DCI, the DCI including the first indication information.

[0010] Optionally, the method further includes: receiving second indication information, where the second indication information is used to indicate switching of PRACH resource configuration.

[0011] Optionally, the receiving the second indication information includes: receiving MAC CE signaling, the MAC CE signaling including the second indication information; or receiving DCI, the DCI including the second indication information.

[0012] Optionally, the DCI is a PDCCH command.

[0013] In a second aspect, an embodiment of the present application provides a communication method, the method comprising: sending configuration information, the configuration information comprising at least two sets of PRACH resource configurations, the first set of PRACH resource configurations in the at least two sets of PRACH resource configurations corresponding to a first PRACH format, and the second set of PRACH resource configurations in the at least two sets of PRACH resource configurations corresponding to a second PRACH format; using a target PRACH resource configuration to receive a random access preamble code, the target PRACH resource configuration being a set of PRACH resource configurations in the at least two sets of PRACH resource configurations.

[0014] Optionally, the time domain width occupied by the PRACH resources in the first set of PRACH resources is greater than the time domain width occupied by the PRACH resources in the second set of PRACH resources, and / or the frequency domain width occupied by the PRACH resources in the first set of PRACH resources is greater than the frequency domain width occupied by the PRACH resources in the second set of PRACH resources; wherein the first set of PRACH resources refers to a set of PRACH resources configured by the first set of PRACH resources configuration, and the second set of PRACH resources refers to a set of PRACH resources configured by the second set of PRACH resources configuration.

[0015] Optionally, the first set of PRACH resource configurations is used for random access in an RRC non-connected state, and the second set of PRACH resource configurations is used for an access process in an RRC connected state.

[0016] Optionally, the method further includes: sending first indication information, where the first indication information is used to indicate the target PRACH resource configuration.

[0017] Optionally, the sending the first indication information includes: sending MAC CE signaling, the MAC CE signaling includes the first indication information; or; sending DCI, the DCI includes the first indication information.

[0018] Optionally, the method further includes: sending second indication information, where the second indication information is used to indicate switching of PRACH resource configuration.

[0019] Optionally, the sending the second indication information includes: sending MAC CE signaling, the MAC CE signaling including the second indication information; or sending DCI, the DCI including the second indication information.

[0020] Optionally, the DCI is a PDCCH command.

[0021] In a third aspect, an embodiment of the present application provides a communication method, the method comprising: sending indication information on a first resource, the indication information being used to indicate the use of a second resource to initiate random access, the second resource being later than the first resource in the time domain.

[0022] In the above scheme, before initiating random access, the terminal device first sends indication information to trigger the network device to detect the PRACH resource. As a result, the network device does not need to perform detection on the configured PRACH resource all the time, but starts the detection when receiving the indication information on the first resource, which is conducive to reducing the detection energy consumption of the network device.

[0023] Optionally, the first resource is a PUCCH resource, and the second resource is a PRACH resource.

[0024] Optionally, the first resource is a first PRACH resource, and the second resource is a second PRACH resource.

[0025] Optionally, the first PRACH resource and the second PRACH resource are orthogonal to each other. The first PRACH resource and the second PRACH resource are orthogonal to each other, which is conducive to avoiding interference between the indication information and the random access request message.

[0026] Optionally, the method further includes: receiving configuration information, the configuration information being used to configure a first set of resources and a second set of resources, the first resources belonging to the first set of resources, and the second resources belonging to the second set of resources.

[0027] Optionally, the interval between the second resource and the first resource in the time domain is greater than or equal to X time units, where X is a positive integer greater than or equal to 1.

[0028] In a fourth aspect, an embodiment of the present application provides a communication method, the method comprising: receiving indication information on a first resource, the indication information being used to indicate the use of a second resource to initiate random access, the second resource being later than the first resource in the time domain.

[0029] Optionally, the first resource is a PUCCH resource, and the second resource is a PRACH resource.

[0030] Optionally, the first resource is a first PRACH resource, and the second resource is a second PRACH resource.

[0031] Optionally, the first PRACH resource and the second PRACH resource are orthogonal to each other.

[0032] Optionally, the method further includes: sending configuration information, where the configuration information is used to configure a first set of resources and a second set of resources, the first resources belong to the first set of resources, and the second resources belong to the second set of resources.

[0033] Optionally, the interval between the second resource and the first resource in the time domain is greater than or equal to X time units, where X is a positive integer greater than or equal to 1.

[0034] In a fifth aspect, an embodiment of the present application provides a communication device, the device comprising: a receiving module for receiving configuration information, the configuration information comprising at least two sets of PRACH resource configurations, the first set of PRACH resource configurations in the at least two sets of PRACH resource configurations corresponding to a first PRACH format, and the second set of PRACH resource configurations in the at least two sets of PRACH resource configurations corresponding to a second PRACH format; a sending module for sending a random access preamble code using a target PRACH resource configuration, the target PRACH resource configuration being one of the at least two sets of PRACH resource configurations.

[0035] Optionally, the time domain width occupied by the PRACH resources in the first set of PRACH resources is greater than the time domain width occupied by the PRACH resources in the second set of PRACH resources, and / or the frequency domain width occupied by the PRACH resources in the first set of PRACH resources is greater than the frequency domain width occupied by the PRACH resources in the second set of PRACH resources; wherein the first set of PRACH resources refers to a set of PRACH resources configured by the first set of PRACH resources configuration, and the second set of PRACH resources refers to a set of PRACH resources configured by the second set of PRACH resources configuration.

[0036] Optionally, the first set of PRACH resource configurations is used for random access in an RRC non-connected state, and the second set of PRACH resource configurations is used for an access process in an RRC connected state.

[0037] Optionally, the receiving module is further used to receive first indication information, where the first indication information is used to indicate the target PRACH resource configuration.

[0038] Optionally, the first indication information is carried in MAC CE signaling or DCI.

[0039] Optionally, the receiving module is further used to receive second indication information, where the second indication information is used to indicate switching of PRACH resource configuration.

[0040] Optionally, the second indication information is carried in MAC CE signaling or DCI.

[0041] Optionally, the DCI is a PDCCH command.

[0042] In a sixth aspect, an embodiment of the present application provides a communication device, the device comprising: a sending module for sending configuration information, the configuration information comprising at least two sets of PRACH resource configurations, the first set of PRACH resource configurations in the at least two sets of PRACH resource configurations corresponding to a first PRACH format, and the second set of PRACH resource configurations in the at least two sets of PRACH resource configurations corresponding to a second PRACH format; a receiving module for receiving a random access preamble code using a target PRACH resource configuration, the target PRACH resource configuration being a set of PRACH resource configurations in the at least two sets of PRACH resource configurations.

[0043] Optionally, the time domain width occupied by the PRACH resources in the first set of PRACH resources is greater than the time domain width occupied by the PRACH resources in the second set of PRACH resources, and / or the frequency domain width occupied by the PRACH resources in the first set of PRACH resources is greater than the frequency domain width occupied by the PRACH resources in the second set of PRACH resources; wherein the first set of PRACH resources refers to a set of PRACH resources configured by the first set of PRACH resources configuration, and the second set of PRACH resources refers to a set of PRACH resources configured by the second set of PRACH resources configuration.

[0044] Optionally, the first set of PRACH resource configurations is used for random access in an RRC non-connected state, and the second set of PRACH resource configurations is used for an access process in an RRC connected state.

[0045] Optionally, the sending module is further used to send first indication information, where the first indication information is used to indicate the target PRACH resource configuration.

[0046] Optionally, the first indication information is carried in MAC CE signaling or DCI.

[0047] Optionally, the sending module is further used to send second indication information, where the second indication information is used to indicate switching of PRACH resource configuration.

[0048] Optionally, the second indication information is carried in MAC CE signaling or DCI.

[0049] Optionally, the DCI is a PDCCH command.

[0050] In the seventh aspect, an embodiment of the present application provides a communication device, comprising: a sending module, used to send indication information on a first resource, wherein the indication information is used to indicate the use of a second resource to initiate random access, and the second resource is later than the first resource in the time domain.

[0051] Optionally, the first resource is a physical uplink control channel PUCCH resource, and the second resource is a PRACH resource.

[0052] Optionally, the first resource is a first PRACH resource, and the second resource is a second PRACH resource.

[0053] Optionally, the first PRACH resource and the second PRACH resource are orthogonal to each other.

[0054] Optionally, the device includes: a receiving module, used to receive configuration information, the configuration information is used to configure a first set of resources and a second set of resources, the first resources belong to the first set of resources, and the second resources belong to the second set of resources.

[0055] Optionally, the interval between the second resource and the first resource in the time domain is greater than or equal to X time units, where X is a positive integer greater than or equal to 1.

[0056] In an eighth aspect, an embodiment of the present application provides a communication device, comprising: a receiving module, used to receive indication information on a first resource, wherein the indication information is used to indicate the use of a second resource to initiate random access, and the second resource is later than the first resource in the time domain.

[0057] Optionally, the first resource is a physical uplink control channel PUCCH resource, and the second resource is a PRACH resource.

[0058] Optionally, the first resource is a first PRACH resource, and the second resource is a second PRACH resource.

[0059] Optionally, the first PRACH resource and the second PRACH resource are orthogonal to each other.

[0060] Optionally, the device includes: a sending module, used to send configuration information, the configuration information is used to configure a first set of resources and a second set of resources, the first resources belong to the first set of resources, and the second resources belong to the second set of resources.

[0061] Optionally, the interval between the second resource and the first resource in the time domain is greater than or equal to X time units, where X is a positive integer greater than or equal to 1.

[0062] In a ninth aspect, an embodiment of the present application further provides a computer-readable storage medium having a computer program stored thereon, and when the computer program is executed by a computer, the steps of the communication method provided in any one of the first to fourth aspects are executed.

[0063] In the tenth aspect, an embodiment of the present application also provides a communication device, including a memory and a processor, wherein the memory stores a computer program that can be executed on the processor, and when the processor runs the computer program, it executes the communication method provided in the first or third aspect above.

[0064] In the eleventh aspect, an embodiment of the present application further provides a communication device, comprising a memory and a processor, wherein the memory stores a computer program that can be executed on the processor, and when the processor runs the computer program, it executes the communication method provided in the second aspect or the fourth aspect.

[0065] In the twelfth aspect, an embodiment of the present application provides a chip (or a communication device) on which a computer program is stored. When the computer program is executed by the chip, the method provided in any one of the first to fourth aspects above is executed.

[0066] In a thirteenth aspect, an embodiment of the present application provides a chip module having a computer program stored thereon. When the computer program is executed by the chip module, the method provided in any one of the first to fourth aspects is executed.

[0067] In a fourteenth aspect, an embodiment of the present application provides a computer program product, which includes a computer program. When the computer program runs on a computer, the computer executes the method provided in any one of the first to fourth aspects above.

[0068] In a fifteenth aspect, an embodiment of the present application provides a communication system, which includes a device for executing the communication method provided in the first aspect or the third aspect and a device for executing the communication method provided in the second aspect or the fourth aspect. BRIEF DESCRIPTION OF THE DRAWINGS

[0069] Figure 1 It is a signaling interaction diagram of the first communication method in the embodiment of the present application;

[0070] Figure 2 is a schematic diagram of signaling interaction of the second communication method in an embodiment of the present application;

[0071] Figure 3 Schematic diagram of signaling interaction of the third communication method in the embodiment of the present application;

[0072] Figure 4 is a flow chart of a fourth communication method in an embodiment of the present application;

[0073] Figure 5 Schematic diagram of signaling interaction of the fifth communication method in the embodiment of the present application;

[0074] Figure 6 Schematic diagram of signaling interaction of the sixth communication method in the embodiment of the present application;

[0075] Figure 7 Schematic diagram of signaling interaction of the seventh communication method in the embodiment of the present application;

[0076] Figure 8 is a flow chart of an eighth communication method in an embodiment of the present application;

[0077] Fig. 9 It is a structural diagram of the first communication device in the embodiment of the present application;

[0078] Fig.10 is a schematic diagram of the structure of a second communication device in an embodiment of the present application;

[0079] Fig.11 is a schematic diagram of the structure of a third communication device in an embodiment of the present application;

[0080] Fig.12 is a schematic diagram of the structure of a fourth communication device in an embodiment of the present application;

[0081] Fig.13 It is a schematic diagram of the hardware architecture of a communication device in an embodiment of the present application;

[0082] Fig.14 It is a schematic diagram of a first resource and a second resource in an embodiment of the present application. DETAILED DESCRIPTION

[0083] The communication systems to which the embodiments of the present application are applicable include, but are not limited to, long term evolution (LTE) systems, fifth generation (5G) systems (such as new radio (NR) systems), and future evolution systems or multiple communication fusion systems. Among them, the 5G system can be a non-standalone (NSA) 5G system or a standalone (SA) 5G system. The solutions of the embodiments of the present application can also be applied to new communication systems in the future, for example, sixth generation (6G) communication systems, etc.

[0084] The present application mainly relates to the communication between terminal equipment and network equipment. The network equipment can be a network equipment in non-terrestrial network (NTN) communication or a network equipment in a terrestrial network communication system.

[0085] The terminal equipment (Terminal Equipment) in the embodiments of the present application may refer to user equipment (UE), access terminal, user unit, user station, mobile station, mobile station (MS), remote station, remote terminal, mobile device, user terminal, wireless communication device, user agent or user device, etc. For example, the terminal equipment may be a cellular phone, a cordless phone, a Session Initiation Protocol (SIP) phone, a Wireless Local Loop (WLL) station, a Personal Digital Assistant (PDA), a handheld device with wireless communication function, a computing device or other processing device connected to a wireless modem, a vehicle-mounted device, a wearable device, a terminal in a future 5G network, or a terminal device in a future evolved public land mobile communication network (PLMN), etc., and the embodiments of the present application are not limited to this. In some embodiments of the present application, the terminal equipment may be an electronic device with a data wireless transmission function. In other embodiments of the present application, the terminal equipment may also be a device with a transceiver function, such as a chip system. Among them, the chip system may include a chip and may also include other discrete devices.

[0086] The network device in the embodiment of the present application may refer to a device that provides wireless communication functions for a terminal device, and the network device may be referred to as an access network device, such as a radio access network (RAN) device, or an access network element, etc. Among them, the network device may support at least one wireless communication technology, such as LTE, NR, etc. For example, the network device may be a base station (BS) (also referred to as a base station device), a base transceiver station (BTS), a node B, an evolved node B (evolved NodeB, eNB), a device that provides base station functions in a 5G network, such as a next generation node B (gNB) and an evolved node B (ng-eNB), wherein the gNB and the terminal device communicate using NR technology, and the ng-eNB and the terminal device communicate using Evolved Universal Terrestrial Radio Access (E-UTRA) technology, and both the gNB and the ng-eNB can be connected to the 5G core network. In wireless local area networks (WLAN), the device that provides base station functions is an access point (AP). The network device in the embodiment of the present application also includes a device that provides wireless communication functions in a future new communication system, etc. In some embodiments, the network device can also be a device that provides wireless communication functions for terminal devices, such as a chip system. For example, the chip system can include a chip and can also include other discrete devices.

[0087] In some embodiments, the network device may refer to a centralized unit (CU) of a base station, or a distributed unit (DU) of a base station, or a CU control plane (CU control plane, CU-CP) of a base station, or a DU user plane (DU user plane, cu-up) of a base station, etc.

[0088] It should be understood that the "and / or" in the embodiments of the present application 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 indicates that the associated objects before and after are in an "or" relationship.

[0089] The term "at least one" as used in the embodiments of the present application refers to one or more. The term "plurality" as used in the embodiments of the present application refers to two or more.

[0090] The first, second, etc. descriptions appearing in the embodiments of the present application are only used for illustration and distinction of the description objects. There is no order, nor do they indicate any special limitation on the number of devices in the embodiments of the present application, and cannot constitute any limitation on the embodiments of the present application.

[0091] In the existing scheme, the network equipment usually configures a set of PRACH resources for each terminal device residing in the cell through system information for the access process. However, in the scenario where the time-frequency offset changes rapidly, some terminal devices can perform time-frequency offset pre-compensation during the access process, but some terminal devices cannot perform time-frequency offset pre-compensation during the access process. For terminal devices that cannot perform time-frequency offset pre-compensation, the set of PRACH resources configured by the network equipment may not guarantee uplink synchronization.

[0092] In NTN communication systems, rapid changes in frequency deviation are a common situation. Specifically, the satellite altitude can reach hundreds to tens of thousands of kilometers, which will cause the transmission delay to be much greater than that of the ground network communication system. For example, the satellite orbit altitude of the geosynchronous orbit is about 35,786 kilometers (km), at which time the transmission delay between the satellite and the ground user reaches more than 100 milliseconds (ms). In addition, if the satellite is a low-orbit satellite, due to the high mobility of low-orbit satellites, it will also bring about a significant Doppler effect, making the frequency deviation and delay change rate between the satellite and the ground user also much greater than the ground network. For example, a low-orbit satellite with an orbit altitude of 600km can reach a speed of 7.56 kilometers per second (km / s), and at low elevation angles, the Doppler frequency deviation can reach more than 20 parts per million (ppm).

[0093] In the NTN communication system, in order to achieve synchronization between the satellite and the terminal equipment on the ground, the terminal equipment needs to determine its own location information, and then determine the timing advance and frequency offset compensation value based on its own location information and the satellite's ephemeris information. Then the terminal equipment sends PRACH based on the timing advance, frequency offset compensation value and configured PRACH resources to ensure uplink synchronization.

[0094] However, the terminal device may not be able to obtain accurate location information, for example, the terminal device is not equipped with a Global Navigation Satellite System (GNSS), or even if the terminal device is equipped with GNSS, an abnormal situation occurs in which accurate location information cannot be obtained through GNSS. In this case, the terminal device cannot determine the timing advance and frequency offset compensation value based on its own location information and ephemeris information, resulting in the terminal device being unable to compensate for the timing offset and frequency offset when accessing.

[0095] In order to deal with the above problems, the network equipment can configure a set of PRACH resources for each terminal device residing in the cell through system information. The PRACH format corresponding to this set of PRACH resources can tolerate large time offset and frequency offset. When the terminal device uses this set of PRACH resources to initiate a random access request, even if there is a large time offset and frequency offset, the network device can successfully receive the random access request sent by the terminal device. Although this solution can solve the problem that the terminal device cannot compensate for time offset and frequency offset mentioned above, the ability of this set of PRACH resources to tolerate large time offset and frequency offset is achieved by sacrificing the resource overhead of the network system and the detection complexity of the network equipment. When the terminal device can pre-compensate for time and frequency offset or the network device can maintain uplink synchronization with the terminal device through the time and frequency offset adjustment mechanism, if this set of PRACH resources is still used, it will cause unnecessary resource overhead and increase the energy consumption of the network device to detect PRACH resources.

[0096] In view of this, an embodiment of the present application provides a communication method. In the scheme of the embodiment of the present application, the network device configures at least two sets of PRACH resource configurations for the terminal device, wherein the first set of PRACH resource configurations in the at least two sets of PRACH resource configurations corresponds to the first PRACH format, and the second set of PRACH resource configurations corresponds to the second PRACH format. During the access process, the terminal device uses the target PRACH resource configuration to send a random access preamble, and the target PRACH resource configuration is one set of PRACH resource configurations in the at least two sets of PRACH resource configurations. In the above scheme, the network device configures two or more sets of PRACH resource configurations for the terminal device, wherein different PRACH resource configurations correspond to different PRACH formats. Since different PRACH formats have different tolerances to time deviation and frequency deviation, the terminal device has the opportunity to use appropriate PRACH resources to send random access preambles to ensure uplink synchronization, thereby meeting the needs of random access and reducing PRACH resource overhead and detection energy consumption of network devices.

[0097] The specific embodiments of the present application are described in detail below in conjunction with the accompanying drawings. In the following embodiments, the actions performed by the network device can be performed by the network device, the device in the network device (e.g., processor, chip), chip, etc., and the actions performed by the terminal device can be performed by the terminal device, the device in the terminal device (e.g., processor, chip), chip, etc., and the present application does not limit this. For the convenience of description, the embodiments provided in the present application are described by taking the execution subject as the network device and the terminal device as an example.

[0098] Embodiment 1

[0099] Reference Figure 1 , Figure 1 Schematic diagram of signaling interaction of the first communication method in the embodiment of the present application. Figure 1 As shown, Figure 1 The illustrated method may include S11 to S13.

[0100] S11, the network device sends configuration information to the terminal device, the configuration information includes a first set of PRACH resource configuration and a second set of PRACH resource configuration, wherein the first set of PRACH resource configuration corresponds to a first PRACH format, and the second set of PRACH resource configuration corresponds to a second PRACH format. Correspondingly, the terminal device receives the configuration information.

[0101] For the sake of distinction, the configuration information in S11 is referred to as first configuration information hereinafter. The first configuration information herein may include two or more sets of PRACH resource configurations, where different PRACH resource configurations are used to configure resources of different PRACH formats.

[0102] Specifically, a set of PRACH resource configurations is used to configure a set of PRACH resources, wherein a set of PRACH resources includes multiple PRACH resources. More specifically, a set of PRACH resource configurations may include: time domain position parameters (such as period, time domain starting position, time domain offset, etc.), frequency domain position parameters (such as frequency domain starting position, frequency domain offset, etc.), time domain length of a PRACH resource, frequency domain width of a PRACH resource, etc. The terminal device can determine the size, time domain position and frequency domain position of each PRACH resource in a set of PRACH resources based on a set of PRACH resource configurations. It should be noted that the size of each PRACH resource in the same set of PRACH resources (that is, the time domain width and the frequency domain width) is the same.

[0103] In a specific implementation, the first configuration information may be carried in the system information, but is not limited thereto.

[0104] Embodiment 1 is mainly described by taking the example that the first configuration information includes two sets of PRACH resource configurations.

[0105] In S11, the first configuration information is used to configure two sets of PRACH resources, wherein the resources configured by the first set of PRACH resource configuration are recorded as the first set of PRACH resources, and the resources configured by the second set of PRACH resource configuration are recorded as the second set of PRACH resources. The first set of PRACH resources corresponds to the first PRACH format, and the second set of PRACH resources corresponds to the second PRACH format. In other words, the PRACH resources in the first set of PRACH resources are resources of the first PRACH format, and the PRACH resources in the second set of PRACH resources are resources of the second PRACH format. That is, the random access preamble transmitted on the first set of PRACH resources is the first PRACH format, and the random access preamble transmitted on the second set of PRACH resources is the second PRACH format.

[0106] The first PRACH format and the second PRACH format are different. For example, the first PRACH format may be a PRACH format for an access process in a non-connected state of Radio Resource Control (RRC), and the second PRACH format may be a PRACH format for an access process in a connected state of RRC.

[0107] The resource overhead of the first PRACH format is greater than the resource overhead of the second PRACH format. Specifically, the resource overhead of the first PRACH format is greater than the resource overhead of the second PRACH format, which may include the following situations:

[0108] Case 1: The time domain width occupied by the PRACH resources in the first set of PRACH resources is greater than the time domain width occupied by the PRACH resources in the second set of PRACH resources, and the frequency domain width occupied by the PRACH resources in the first set of PRACH resources is the same as the frequency domain width occupied by the PRACH resources in the second set of PRACH resources. In other words, the time domain width occupied by all PRACH resources in the first set of PRACH resources is greater than the time domain width occupied by all PRACH resources in the second set of PRACH resources.

[0109] Case 2: The time domain width occupied by the PRACH resources in the first set of PRACH resources is the same as the time domain width occupied by the PRACH resources in the second set of PRACH resources, and the frequency domain width occupied by the PRACH resources in the first set of PRACH resources is greater than the frequency domain width occupied by the PRACH resources in the second set of PRACH resources. In other words, the frequency domain width occupied by all PRACH resources in the first set of PRACH resources is greater than the frequency domain width occupied by all PRACH resources in the second set of PRACH resources.

[0110] Case 3: The time domain width occupied by the PRACH resources in the first set of PRACH resources is greater than the time domain width occupied by the PRACH resources in the second set of PRACH resources, and the frequency domain width occupied by the PRACH resources in the first set of PRACH resources is greater than the frequency domain width occupied by the PRACH resources in the second set of PRACH resources. In other words, the time domain width occupied by all PRACH resources in the first set of PRACH resources is greater than the time domain width occupied by all PRACH resources in the second set of PRACH resources, and the frequency domain width occupied by all PRACH resources in the first set of PRACH resources is greater than the frequency domain width occupied by all PRACH resources in the second set of PRACH resources.

[0111] In a specific implementation, when the frequency domain width is constant, the larger the time domain width occupied by the PRACH resource, the larger the time deviation that the PRACH format or PRACH resource can tolerate. When the time domain width is constant, the larger the frequency domain width occupied by the PRACH resource, the larger the frequency deviation that the PRACH format or PRACH resource can tolerate.

[0112] For example, in the RRC non-connected state, if accurate location information cannot be obtained, the terminal device cannot maintain synchronization, so there is a large time offset and frequency offset between the terminal device and the network device. In the RRC connected state, the terminal device can generally maintain uplink synchronization with the network device regularly. Although gradual desynchronization may occur over time, the time offset and frequency offset between the terminal device and the network device are usually small. For this reason, the first set of PRACH resource configurations can be used for random access in the RRC non-connected state, and the second set of PRACH resource configurations can be used for the access process in the RRC connected state. Among them, the RRC non-connected state can be the RRC idle state, or it can be the RRC inactive state.

[0113] More specifically, random access in the RRC non-connected state can be an access process in any of the following scenarios: initial access (Initial access from RRC_IDLE) of the terminal device in the RRC idle state (RRC_IDLE), and the transition process of the terminal device from the RRC inactive state (RRC_Inactive) to the RRC connected state (RRC_CONNECTED).

[0114] The access procedure in the RRC connected state can be any of the following: the access procedure in the RRC connection reestablishment scenario; the access procedure when the terminal device performs a handover; the access procedure in the beam failure recovery scenario; the synchronous reconfiguration; the access procedure in the timing alignment during Scell ​​addition scenario; the access procedure triggered by the physical downlink control channel (PDCCH) reordering (DL out of Synchronization-gNB TrigerrsPDCCH order) when the downlink (DL) is out of synchronization; the uplink (UL) out of synchronization (UL Out of Synchronization); the access procedure triggered by the maximum number of scheduling request (SR Max Transmission reached); the access procedure triggered by the physical uplink control channel (PUCCH) not configured for UL Data Arrival–No PUCCH Configured for UL Data Arrival–No PUCCH Configured for SR); access process triggered by other system information requests (On demand System information).

[0115] S12, the terminal device determines a target PRACH resource configuration, where the target PRACH resource configuration is one of the first set of PRACH resource configurations and the second set of PRACH resource configurations.

[0116] In the solution of the first embodiment, the terminal device determines the used PRACH resource configuration or the used PRACH format according to a default rule, wherein the default rule may be predefined by a protocol or may be preconfigured by a network device.

[0117] Exemplarily, the default rule may refer to the first set of PRACH resource configurations being used for random access in an RRC non-connected state, and the second set of PRACH resource configurations being used for an access process in an RRC connected state. That is, the default rule may refer to the first PRACH format being used for random access in an RRC non-connected state, and the second PRACH format being used for an access process in an RRC connected state. To this end, if a terminal device initiates random access in an RRC non-connected state, the terminal device determines that the target PRACH resource configuration is the first set of PRACH resource configurations. In other words, if a terminal device initiates random access in an RRC non-connected state, the terminal device determines to use the first PRACH format. If a terminal device initiates random access in an RRC connected state, the terminal device determines that the target PRACH resource configuration is the second set of PRACH resource configurations. In other words, if a terminal device initiates an access process in an RRC connected state, the terminal device determines to use the second PRACH format.

[0118] It should be noted that, in the solutions of various embodiments of the present application, determining the target PRACH resource configuration is to determine the target PRACH format, and the target PRACH format is one of the first PRACH format and the second PRACH format.

[0119] Among them, S12 is an optional step.

[0120] S13, the terminal device uses the target PRACH resource configuration to send a random access preamble to the network device. Correspondingly, the network device uses the target PRACH resource configuration to receive the random access preamble.

[0121] Specifically, the terminal device sends a random access preamble on the PRACH resource configured by the target PRACH resource configuration. Correspondingly, the network device can detect on the configured PRACH resource to receive the random access preamble. It should be noted that the random access preamble is called a preamble, or a PRACH sequence, etc.

[0122] More specifically, if the target PRACH resource configuration is a first set of PRACH resource configurations, in S13, the terminal device may initiate random access on a PRACH resource in the first set of PRACH resources. If the target PRACH resource configuration is a second set of PRACH resource configurations, in S13, the terminal device initiates random access on a PRACH resource in the second set of PRACH resources. That is, the terminal device initiates random access on a PRACH resource in a set of PRACH resources configured with the target PRACH resource. It should be noted that which PRACH resource in a set of PRACH resources configured with the target PRACH resource on which the terminal device initiates random access may depend on the specific implementation of the terminal device. For example, the nearest PRACH resource in the time domain may be used, etc. This embodiment does not limit this.

[0123] From the above, in the scheme of embodiment 1, the network device configures two sets of PRACH resource configurations, and the terminal device determines the target PRACH resource configuration to be used in the two sets of configured PRACH resource configurations according to the default rules. That is, the network device configures PRACH resources of two PRACH formats, and the terminal device determines the target PRACH format to be used in the two PRACH formats according to the default rules. The above scheme can meet the corresponding uplink synchronization requirements. In addition, compared with the indiscriminate use of the same set of PRACH resource configurations that can tolerate larger time deviations and frequency deviations, the above scheme is also conducive to reducing resource overhead and detection energy consumption of network equipment.

[0124] It should be noted that the above-mentioned first configuration information may also include more than two sets of PRACH resource configurations. Among them, different PRACH resource configurations correspond to different PRACH formats. That is, the first configuration information can be used to configure two or more sets of PRACH resources, and the PRACH resources configured by different PRACH resource configurations occupy different time domain widths and / or different frequency domain widths, so that different PRACH resource configurations can tolerate different degrees of time deviation and frequency deviation. The terminal device can determine the target PRACH configuration among multiple sets of PRACH resource configurations according to the actual scenario to meet the random access requirements in the actual scenario.

[0125] Embodiment 2

[0126] Reference Figure 2 , Figure 2 Schematic diagram of signaling interaction of the second communication method in the embodiment of the present application. Figure 2 As shown, Figure 1 The illustrated method may include S21 to S23.

[0127] S21, the network device sends first configuration information to the terminal device, the first configuration information includes a first set of PRACH resource configuration and a second set of PRACH resource configuration, wherein the first set of PRACH resource configuration corresponds to a first PRACH format, and the second set of PRACH resource configuration corresponds to a second PRACH format. Correspondingly, the terminal device receives the first configuration information.

[0128] For the specific content of S21, please refer to the above description of S11, which will not be repeated here.

[0129] S22, the network device sends first indication information to the terminal device, where the first indication information is used to indicate the target PRACH resource configuration. Correspondingly, the terminal device receives the first indication information.

[0130] Further, the terminal device determines the target PRACH resource configuration used in subsequent random access according to the first indication information. In other words, the first indication information can be used to indicate the target PRACH format, and the terminal device can determine the PRACH format used in subsequent random access according to the first indication information.

[0131] Specifically, the first indication information may include at least one information bit, wherein the value of the at least one information bit is different, and the target PRACH resource configuration indicated by the first indication information is different. The number of information bits depends on the number of PRACH resource configurations included in the first configuration information.

[0132] In the solution of the second embodiment, the number of information bits may be 1. If the value of the 1 bit is 0, it indicates that the target PRACH resource configuration is the first set of PRACH resource configurations. If the value of the 1 bit is 1, it indicates that the target PRACH resource configuration is the second set of PRACH resource configurations.

[0133] In other embodiments, the first configuration information may include more than two sets of PRACH resource configurations, and correspondingly, the first indication information may include two or more information bits.

[0134] As an example, the network device sends a medium access control-control element (MAC CE) signaling to the terminal device, where the MAC CE signaling includes first indication information.

[0135] As another example, the network device sends downlink control information (DCI) to the terminal device, and the DCI includes first indication information. For example, the DCI may be a PDCCH order, and the PDCCH order may be used to trigger random access. In the random access triggered by the PDCCH order, the terminal device may initiate random access according to the PRACH resources configured by the target PRACH resource configuration indicated by the PDCCH order.

[0136] It should be noted that the target PRACH resource configuration or target PRACH format indicated by the first indication information may depend on the decision of the network device. For example, the network device may determine the target PRACH resource configuration or target PRACH format used by the terminal device according to the uplink synchronization of the terminal device.

[0137] Among them, S22 is an optional step.

[0138] S23, the terminal device uses the target PRACH resource configuration to send a random access preamble to the network device. Correspondingly, the network device uses the target PRACH resource configuration to receive the random access preamble.

[0139] For the specific content of S23, please refer to the above description of S13, which will not be repeated here.

[0140] From the above, in the solution of embodiment 2, the network device configures two sets of PRACH resource configurations, and the network device dynamically indicates the target PRACH resource configuration to the terminal device. That is, the network device configures PRACH resources of two PRACH formats, and the network device indicates the target PRACH format of the two PRACH formats. With the above solution, the terminal device can initiate random access using the PRACH resource of the appropriate format according to the instruction of the network device.

[0141] For more details about the second embodiment, please refer to the above description about the first embodiment, which will not be repeated here.

[0142] Embodiment 3

[0143] Reference Figure 3 , Figure 3 Schematic diagram of signaling interaction of the third communication method in the embodiment of the present application. Figure 3 As shown, Figure 3 The illustrated method may include S31 to S33.

[0144] S31, the network device sends first configuration information to the terminal device, the first configuration information includes a first set of PRACH resource configuration and a second set of PRACH resource configuration, wherein the first set of PRACH resource configuration corresponds to a first PRACH format, and the second set of PRACH resource configuration corresponds to a second PRACH format. Correspondingly, the terminal device receives the first configuration information.

[0145] For the specific content of S31, please refer to the above description of S11, which will not be repeated here.

[0146] S32, the network device sends second indication information to the terminal device, where the second indication information is used to indicate switching of PRACH resource configuration. Correspondingly, the terminal device receives the second indication information.

[0147] It should be noted that the switching of PRACH resource configuration is also the switching of PRACH format.

[0148] As an example, the network device sends MAC CE signaling to the terminal device, and the MAC CE signaling includes the second indication information.

[0149] Specifically, the MAC CE signaling may include 1 information bit. If the value of this 1 bit is 0, the terminal device does not switch the PRACH resource configuration, that is, the subsequent PRACH resource configuration still uses the current target PRACH resource configuration. If the value of this 1 bit is 1, the terminal device switches the PRACH resource configuration. For example, assuming that the current target PRACH resource configuration is the first set of PRACH resource configuration, and the value of 1 bit in the first indication information is 1, the terminal device uses the second set of PRACH resource configuration to initiate random access in subsequent random access. Assuming that the current target PRACH resource configuration is the first set of PRACH resource configuration, and the value of 1 bit in the first indication information is 0, the terminal device still uses the first set of PRACH resource configuration to initiate random access in subsequent random access.

[0150] As another example, the network device sends a DCI to the terminal device, and the DCI includes the second indication information. Specifically, the DCI may include 1 information bit. If the value of the 1 bit is 0, the terminal device does not switch the PRACH resource configuration, that is, the subsequent PRACH resource configuration still uses the current target PRACH resource configuration. If the value of the 1 bit is 1, the terminal device switches the PRACH resource configuration. For example, the DCI may be a PDCCH order. In the random access triggered by the PDCCH order, the terminal device can determine the target PRACH resource configuration or the target PRACH format according to the PDCCH order.

[0151] As a variation, the first configuration information may include more than two sets of PRACH resource configurations. In this case, the MAC CE signaling or DCI may still include 1 information bit. If the value of the 1 bit is 0, the terminal device does not switch the PRACH resource configuration. If the value of the bit is 1, the terminal device can switch in the order of multiple sets of PRACH resource configurations. That is, in response to the switching indication of the PRACH resource configuration, the terminal device can switch the PRACH configuration in a fixed order. Among them, the fixed order can be the index order of multiple sets of PRACH resource configurations, etc., but is not limited to this. Alternatively, the second indication information may include the first indication information, that is, the second indication information not only indicates the switching of the PRACH resource configuration, but also indicates the target PRACH resource configuration to be switched to. Alternatively, the second indication information may indicate the target PRACH resource configuration through multiple information bits.

[0152] Among them, S32 is an optional step.

[0153] S33, the terminal device sends a random access preamble to the network device using the target PRACH resource configuration. Correspondingly, the network device receives the random access preamble using the target PRACH resource configuration.

[0154] For the specific content of S33, please refer to the above description of S13, which will not be repeated here.

[0155] From the above, in the solution of embodiment 3, the network device configures two or more sets of PRACH resource configurations, and the network device dynamically instructs the terminal device to switch the PRACH resource configuration, and the terminal device determines whether to switch the PRACH resource configuration based on the instruction of the network device. With the above solution, the terminal device can flexibly use the PRACH resource of the appropriate format to initiate random access according to the instruction of the network device.

[0156] For more details about the third embodiment, please refer to the above descriptions about the first and second embodiments, which will not be repeated here.

[0157] Embodiment 4

[0158] Reference Figure 4 , Figure 4 It is a flow chart of the fourth communication method in the embodiment of the present application. Figure 4 The illustrated solution can be applied to a terminal device, for example, Figure 4 The method shown can be executed by a terminal device, or can also be executed by a chip or chip module with communication function in the terminal device. Figure 4 As shown, Figure 4 The illustrated method may include S41.

[0159] S41, receiving configuration information, the configuration information including at least two sets of PRACH resource configurations, a first set of PRACH resource configurations in the at least two sets of PRACH resource configurations corresponding to a first PRACH format, and a second set of PRACH resource configurations in the at least two sets of PRACH resource configurations corresponding to a second PRACH format.

[0160] The configuration information may be sent by a network device. The configuration information may include at least two sets of PRACH resource configurations, wherein different PRACH resource configurations correspond to different PRACH formats.

[0161] Specifically, the PRACH resources of different PRACH resource configurations occupy different time domain widths, and / or the PRACH resources of different PRACH resource configurations occupy different frequency domain widths.

[0162] For the specific content of the configuration information in S41, please refer to the relevant description of the first configuration information in this document.

[0163] S42: Send a random access preamble using a target PRACH resource configuration, where the target PRACH resource configuration is one of at least two sets of PRACH resource configurations.

[0164] Correspondingly, the network device receives the random access preamble code sent on the PRACH resource of the target PRACH resource configuration. The target PRACH resource configuration may be indicated by the network device, or may be determined by the terminal device itself.

[0165] From the above, in the scheme of embodiment 4, the network device configures PRACH resources of at least two PRACH formats, and the terminal device initiates random access using the PRACH resources of the target PRACH format. Since different PRACH formats have different tolerances to time offset and frequency offset, the terminal device has the opportunity to use appropriate PRACH resources to send a random access preamble to ensure uplink synchronization, which can not only meet the needs of random access, but also help reduce PRACH resource overhead and detection energy consumption of network devices.

[0166] For more details about the fourth embodiment, please refer to the above descriptions about the first to third embodiments, which will not be repeated here.

[0167] Embodiment 5

[0168] Reference Figure 5 , Figure 5 Schematic diagram of signaling interaction of the fifth communication method in the embodiment of the present application. Figure 5 As shown, Figure 5 The illustrated method may include S51 to S52.

[0169] S51, the network device sends configuration information to the terminal device, the configuration information is used to configure the first set of resources and the second set of resources. Correspondingly, the terminal device receives the configuration information. For the sake of distinction, the configuration information in S51 is hereinafter referred to as the second configuration information.

[0170] In an implementation of the fifth embodiment, the first set of resources and the second set of resources may both be PRACH resources, and the first set of resources and the second set of resources may be orthogonal to each other. Furthermore, the PRACH formats of the first set of resources and the second set of resources may be the same.

[0171] In another implementation of the fifth embodiment, the first set of resources may be PUCCH resources, and the second set of resources may be PRACH resources.

[0172] It should be noted that the first set of resources and the second set of resources may be configured in the same high-level signaling, or may be configured through different high-level signaling, and this embodiment does not limit this.

[0173] Among them, S51 is optional.

[0174] S52, the terminal device sends indication information to the network device on the first resource, where the indication information is used to indicate the use of the second resource to initiate random access, the second resource is later than the first resource in the time domain, the first resource belongs to the first set of resources, and the second resource belongs to the second set of resources.

[0175] That is, the first resource is a resource in the first set of resources, and the second resource is a resource in the second set of resources.

[0176] Correspondingly, the network device receives the indication information on the first resource, and in response to the indication information received on the first resource, the network device performs detection on the second set of resources.

[0177] It should be noted that the first set of resources may include one or more resources. When the first set of resources includes multiple resources, the time domain positions of the multiple resources in the first set of resources are different and / or the frequency domain positions are different. Similarly, the second set of resources may include one or more resources. When the second set of resources includes multiple resources, the time domain positions of the multiple resources in the first set of resources are different and / or the frequency domain positions are different. It should also be noted that the time domain width and frequency domain width of each resource in the same set of resources are the same.

[0178] For the sake of distinction, the indication information in S52 is referred to as third indication information hereinafter.

[0179] Specifically, before the terminal device uses the second set of resources to initiate random access, it can first send the third indication information on the first resource, where the first resource belongs to the first set of resources. It should be noted that this embodiment does not limit the time domain position and frequency domain position of the first resource in the first set of resources. For example, the terminal device can determine the first resource for sending the third indication information in the first set of resources. In other words, the terminal device selects one of the resources in the first set of resources to send the third indication information.

[0180] Further, after the network device receives the third indication information, the network device performs detection on the second set of resources. That is, the network device can learn based on the third indication information that the terminal device will send a random access preamble on the second set of resources. That is, the third indication information is used to trigger the network device to detect the second set of resources.

[0181] Exemplarily, the third indication information may be a random access preamble code sent by the terminal device on the second resource.

[0182] Further, after sending the third indication information, the terminal device may delay at least X time units to initiate random access. Wherein X is a positive integer greater than 1 or equal to 1. The value of X may be pre-configured by the network device, or may be defined by the protocol. It should be noted that the "time unit" in this article may refer to a time slot, a symbol, a subframe, a millisecond, etc.

[0183] Specifically, the terminal device may select a second resource from the second set of resources whose time domain position interval with the first resource is greater than or equal to X time units, and then initiate random access on the second resource. That is, the time interval between the second resource and the first resource is greater than or equal to X time units.

[0184] Reference Fig.14 , Fig.14 It is a schematic diagram of a first resource and a second resource in an embodiment of the present application.

[0185] Assume X = 2, Fig.14 The second set of resources shown includes: resource 1 to resource 7. After the terminal device sends the third indication information on the first resource, it can select a resource from the second set of resources that is at least two time units later than the first resource as the second resource. That is, the terminal device can initiate random access by using one of resource 5, resource 6 and resource 7 as the second resource.

[0186] From the above, in the scheme of embodiment 5, before initiating random access, the terminal device sends the third indication information on the specific resources configured by the network device to trigger the network device to detect the PRACH resources. With such a scheme, the network device does not need to detect the PRACH resources all the time, but only needs to start the detection of the PRACH resources when receiving the third indication information, which is conducive to reducing the energy consumption of the network device to detect the PRACH.

[0187] Embodiment 6

[0188] Reference Figure 6 , Figure 6 Schematic diagram of signaling interaction of the sixth communication method in the embodiment of the present application. Figure 6 As shown, Figure 6 The illustrated method may include S61 to S62.

[0189] S61, the network device sends first configuration information to the terminal device, the first configuration information includes a first set of PRACH resource configuration and a second set of PRACH resource configuration, wherein the first set of PRACH resource configuration corresponds to a first PRACH format, and the second set of PRACH resource configuration corresponds to a second PRACH format. Correspondingly, the terminal device receives the first configuration information.

[0190] For the specific content of S61, please refer to the relevant description of S11 in the first embodiment, which will not be repeated here.

[0191] S62, the terminal device determines that the target PRACH resource configuration is the first set of PRACH resource configuration.

[0192] Among them, the terminal device can determine that the target PRACH resource configuration is the first set of PRACH resource configuration according to the default rule, or the terminal device can also determine that the target PRACH resource configuration is the first set of PRACH resource configuration according to the instruction of the network device.

[0193] Among them, S61 and S62 are optional.

[0194] S63, the terminal device sends third indication information to the network device on the first resource, the third indication information is used to indicate the use of the first set of PRACH resources to initiate random access, wherein at least part of the PRACH resources in the first set of PRACH resources is later than the first resource. .

[0195] Specifically, at least a part of the PRACH resources in the first set of PRACH resources being later than the first resource may mean that one or more PRACH resources in the first set of PRACH resources are later than the first resource. In S63, the terminal device may initiate random access on a PRACH resource in the first set of PRACH resources that is later than the first resource.

[0196] More specifically, at least a portion of the PRACH resources in the first set of PRACH resources meet the following conditions: they are later than the first resource and the interval between them in the time domain is greater than or equal to X time units. In S63, the terminal device may initiate random access on a PRACH resource in the first set of PRACH resources that is at least X time units later than the first resource.

[0197] The first resource may be a PRACH resource or a PUCCH resource.

[0198] Exemplarily, the first resource is a PRACH resource. For easy distinction, the first set of resources to which the first resource in Embodiment 6 belongs is recorded as the third set of PRACH resources. The third set of PRACH resources and the first set of PRACH resources may correspond to the same PRACH format.

[0199] In the scheme of embodiment six, the terminal device uses the first resource to send the third indication information before initiating random access using a PRACH resource in the first set of PRACH resources. Furthermore, the terminal device initiates random access on a PRACH resource that belongs to the first set of PRACH resources and is later than the first resource. For example, the terminal device may select a PRACH resource from the PRACH resources that belong to the first set of PRACH resources, that is later than the first resource, and that is at least X time units apart from the first resource in the time domain to initiate random access. Correspondingly, after receiving the third indication information on the first resource, the network device starts detecting the first set of PRACH resources.

[0200] In addition, in the scheme of Example 6, if the terminal device determines that the target PRACH resource configuration is the second set of PRACH resource configuration, the terminal device does not need to send the third indication information before initiating random access, and the network device's detection on the second set of PRACH resources does not need to be triggered by the third indication information.

[0201] For more details about the sixth embodiment, please refer to the above descriptions about the first to fifth embodiments, which will not be repeated here.

[0202] Embodiment 7

[0203] Reference Figure 7 , Figure 7 Schematic diagram of signaling interaction of the seventh communication method in the embodiment of the present application. Figure 7 As shown, Figure 7 The illustrated method may include S71 to S73.

[0204] S71, the network device sends first configuration information to the terminal device, the first configuration information includes a first set of PRACH resource configuration and a second set of PRACH resource configuration, wherein the first set of PRACH resource configuration corresponds to a first PRACH format, and the second set of PRACH resource configuration corresponds to a second PRACH format. Correspondingly, the terminal device receives the first configuration information.

[0205] S72, determining that the target PRACH resource configuration is a second set of PRACH resource configuration;

[0206] Among them, the terminal device can determine that the target PRACH resource configuration is the second set of PRACH resource configuration according to the default rule, or the terminal device can also determine that the target PRACH resource configuration is the second set of PRACH resource configuration according to the instruction of the network device.

[0207] Among them, S71 and S72 are optional.

[0208] S73, the terminal device sends third indication information to the network device on the first resource, the third indication information is used to indicate the use of the second set of PRACH resources to initiate random access, wherein at least a portion of the PRACH resources in the first set of PRACH resources is later than the first resource. .

[0209] Specifically, at least a part of the PRACH resources in the second set of PRACH resources being later than the first resource may mean that one or more PRACH resources in the second set of PRACH resources are later than the first resource. In S73, the terminal device may initiate random access on a PRACH resource in the second set of PRACH resources that is later than the first resource.

[0210] More specifically, at least a portion of the PRACH resources in the second set of PRACH resources are later than the first resources and the interval between the PRACH resources and the first resources in the time domain is greater than or equal to X time units. In S63, the terminal device may initiate random access in the PRACH resources in the second set of PRACH resources that are later than the first resources by at least X time units.

[0211] The first resource may be a PRACH resource or a PUCCH resource.

[0212] Exemplarily, the first resource is a PRACH resource, and for easy distinction, the first set of resources to which the first resource in Embodiment 7 belongs is recorded as the fourth set of PRACH resources. The fourth set of PRACH resources and the second set of PRACH resources may correspond to the same PRACH format.

[0213] In the scheme of embodiment seven, the terminal device uses the first resource to send the third indication information before initiating random access using a PRACH resource in the second set of PRACH resources. Furthermore, the terminal device initiates random access on a PRACH resource that belongs to the second set of PRACH resources and is later than the first resource. For example, the terminal device may select a PRACH resource from the PRACH resources that belong to the second set of PRACH resources, that is later than the first resource, and that is at least X time units apart from the first resource in the time domain to initiate random access. Correspondingly, after receiving the third indication information on the first resource, the network device starts detecting the second set of PRACH resources.

[0214] In addition, in the scheme of Example 7, if the terminal device determines that the target PRACH resource configuration is the first set of PRACH resource configuration, the terminal device does not need to send the third indication information before initiating random access, and the network device's detection on the first set of PRACH resources does not need to be triggered by the third indication information.

[0215] For more details about the seventh embodiment, please refer to the above descriptions about the first to sixth embodiments, which will not be repeated here.

[0216] Embodiment 8

[0217] Reference Figure 8 , Figure 8 It is a flow chart of the eighth communication method in the embodiment of the present application. Figure 8 The illustrated solution can be applied to a terminal device, for example, Figure 8 The method shown can be executed by a terminal device, or can also be executed by a chip or chip module with communication function in the terminal device. Figure 8 As shown, Figure 8 The illustrated method may include S81.

[0218] S81. Send indication information on a first resource, where the indication information is used to indicate the use of a second resource to initiate random access, where the second resource is later than the first resource in the time domain.

[0219] The first resource and the second resource are both PRACH resources and have the same PRACH format.

[0220] Alternatively, in S81, the terminal device may send indication information on the first set of resources, the indication information being used to indicate the use of the second set of resources to initiate random access. At least one resource in the second set of resources is later than all resources in the first set of resources in the time domain. The first resource above may refer to a resource in the first set of resources actually used to send the indication information, and the second resource may refer to a resource in the second set of resources actually used to initiate random access.

[0221] Specifically, the terminal device may send indication information on one of the resources in the first set of resources (i.e., the first resource), and further, the terminal device initiates random access on a resource that belongs to the second set of resources and is later than the first resource (i.e., the second resource). More specifically, the second resource and the first resource are separated by at least X time units in the time domain.

[0222] For the indication information in S81, please refer to the relevant description of the third indication information in this document, which will not be repeated here.

[0223] Figure 8 The illustrated solution may be applicable to a scenario in which a network device configures only one PRACH format for a terminal device.

[0224] or, Figure 8 The illustrated solution may also be applicable to a scenario where a network device configures a plurality of PRACH formats for a terminal device.

[0225] Specifically, the network device may configure Y sets of PRACH resources for the terminal device through the first configuration information, wherein different sets of PRACH resources correspond to different PRACH formats. Y is a positive integer greater than or equal to 2.

[0226] The second set of resources to which the second resource belongs may be any set of PRACH resources in the Y sets of PRACH resources. That is, the network device also configures the first resource corresponding to each set of PRACH resources for the terminal device. Before initiating random access, the terminal device may send indication information on the first resource corresponding to the PRACH resource to be used, and the network device initiates detection on the PRACH resource corresponding to the first resource based on the first resource where the received indication information is located.

[0227] Alternatively, the second set of resources to which the second resource belongs may be a specific set or sets of PRACH resources in the Y sets of PRACH resources. Before initiating random access, if the PRACH resources to be used are a specific set of PRACH resources, the terminal device may send indication information on the first resources corresponding to the PRACH resources to be used, and the network device initiates detection on the PRACH resources corresponding to the first resources based on the first resource where the received indication information is located. If the PRACH resources to be used are not a specific set of PRACH resources, the terminal device does not need to send indication information first.

[0228] For more details about this embodiment, please refer to the above descriptions about Embodiments 5 to 7, which will not be repeated here.

[0229] It should be understood that the above embodiments can be used alone or in combination with each other to achieve different technical effects.

[0230] It can be understood that, in a specific implementation, the above method can be implemented in the form of a software program, which runs in a processor integrated inside a chip or a chip module; or, the method can be implemented in hardware or a combination of hardware and software, such as using a dedicated chip or chip module, or using a dedicated chip or chip module in combination with a software program.

[0231] Reference Fig. 9 , Fig. 9 It is a structural diagram of the first communication device in the embodiment of the present application. Fig. 9 The communication device shown can be deployed in the above-mentioned terminal device. Fig. 9 The device shown may include: a receiving module 91 and a sending module 92;

[0232] A receiving module 91 is configured to receive configuration information, wherein the configuration information includes at least two sets of physical random access channel PRACH resource configurations, wherein a first set of PRACH resource configurations in the at least two sets of PRACH resource configurations corresponds to a first PRACH format, and a second set of PRACH resource configurations in the at least two sets of PRACH resource configurations corresponds to a second PRACH format;

[0233] The sending module 92 is configured to send a random access preamble using a target PRACH resource configuration, where the target PRACH resource configuration is one of the at least two sets of PRACH resource configurations.

[0234] In the specific implementation, Fig. 9 The communication device shown may correspond to a chip with communication function in a terminal device; or correspond to a chip or chip module with communication function in a terminal device, or correspond to a terminal device.

[0235] Reference Fig.10 , Fig.10 It is a structural diagram of the second communication device in the embodiment of the present application. Fig.10 The communication device shown can be deployed in the above-mentioned network equipment. Fig.10 The device shown may include: a sending module 101 and a receiving module 102, wherein:

[0236] A sending module 101 is used to send configuration information, where the configuration information includes at least two sets of physical random access channel PRACH resource configurations, where a first set of PRACH resource configurations in the at least two sets of PRACH resource configurations corresponds to a first PRACH format, and a second set of PRACH resource configurations in the at least two sets of PRACH resource configurations corresponds to a second PRACH format;

[0237] The receiving module 102 is configured to receive a random access preamble using a target PRACH resource configuration, where the target PRACH resource configuration is one of the at least two sets of PRACH resource configurations.

[0238] In the specific implementation, Fig.10 The communication device shown may correspond to a chip with a communication function in a network device; or correspond to a chip or chip module with a communication function in a network device, or correspond to a network device.

[0239] Reference Fig.11 , Fig.11 It is a structural diagram of the third communication device in the embodiment of the present application. Fig.11 The communication device shown can be deployed in the above-mentioned terminal device. Fig.11 The device shown may include: a sending module 111;

[0240] The sending module 111 is used to send indication information on the first resource, where the indication information is used to indicate to use the second resource to initiate random access, and the second resource is later than the first resource in the time domain.

[0241] In the specific implementation, Fig.11 The communication device shown may correspond to a chip with communication function in a terminal device; or correspond to a chip or chip module with communication function in a terminal device, or correspond to a terminal device.

[0242] Reference Fig.12 , Fig.12 It is a structural diagram of the fourth communication device in the embodiment of the present application. Fig.12 The communication device shown can be deployed in the above-mentioned network equipment. Fig.12 The device shown may include: a receiving module 121, wherein:

[0243] The receiving module 121 is used to receive indication information on a first resource, where the indication information is used to indicate to use a second resource to initiate random access, where the second resource is later than the first resource in the time domain.

[0244] In the specific implementation, Fig.12 The communication device shown may correspond to a chip with a communication function in a network device; or correspond to a chip or chip module with a communication function in a network device, or correspond to a network device.

[0245] For more information about the working principle, working method, beneficial effects, etc. of the communication device in the embodiment of the present application, please refer to the above description of the communication method, which will not be repeated here.

[0246] The embodiment of the present application also provides a computer-readable storage medium, on which a computer program is stored, and when the computer program is executed by a processor, the above-mentioned communication method is executed. The storage medium may include ROM, RAM, a magnetic disk or an optical disk, etc. The storage medium may also include a non-volatile memory (non-volatile) or a non-transitory memory, etc.

[0247] The embodiment of the present application also provides a communication device, including a memory and a processor, wherein the memory stores a computer program that can be run on the processor, and the processor executes the steps of the above communication method when running the computer program. The communication device can be the network device mentioned above, or it can be the terminal device mentioned above.

[0248] Reference Fig.13 , Fig.13 It is a schematic diagram of the hardware structure of a communication device in an embodiment of the present application. Fig.13 The communication device shown may be the network device mentioned above, or may be the terminal device mentioned above. Fig.13 The communication device shown includes a memory 131, a processor 132 and a transceiver 133. The processor 132 is coupled to the memory 131 and the transceiver 133. The memory 131 can be located inside the communication device or outside the communication device. The memory 131, the processor 132 and the transceiver 133 can be connected via a communication bus. The transceiver 133 is used to communicate with other devices. The memory 131 stores a computer program that can be run on the processor 132. When the processor 132 runs the computer program, the steps in the method provided in the above embodiment are executed, and / or when the processor 132 runs the computer program, the transceiver 313 executes the steps in the method provided in the above embodiment.

[0249] It should be understood that in the embodiments of the present application, the processor may be a central processing unit (CPU), and the processor 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. A general-purpose processor may be a microprocessor or the processor may also be any conventional processor, etc.

[0250] It should also be understood that the memory in the embodiments of the present application may be a volatile memory or a non-volatile memory, or may include both volatile and non-volatile memories. Among them, the non-volatile memory may be a read-only memory (ROM), a programmable read-only memory (PROM), an erasable programmable read-only memory (EPROM), an electrically erasable programmable read-only memory (EEPROM), or a flash memory. The volatile memory may be a random access memory (RAM), which is used as an external cache. By way of example and not limitation, many forms of random access memory (RAM) are available, such as static RAM (SRAM), dynamic random access memory (DRAM), synchronous DRAM (SDRAM), double data rate synchronous dynamic random access memory (DDR SDRAM), enhanced synchronous dynamic random access memory (ESDRAM), synchronous link DRAM (SLDRAM), and direct rambus RAM (DR RAM).

[0251] The above embodiments may be implemented in whole or in part by software, hardware, firmware or any other combination thereof. When implemented using software, the above embodiments may 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 or computer programs. When the computer instructions or computer programs are loaded or executed on a computer, the processes or functions described in the embodiments of the present application are generated in whole or in part. The computer may be a general-purpose computer, a special-purpose computer, a computer network, or other programmable devices. The computer program may be stored in a computer-readable storage medium, or may be transmitted from one computer-readable storage medium to another computer-readable storage medium, for example, the computer program may be transmitted from one website, computer, server or data center to another website, computer, server or data center by wired or wireless means.

[0252] It should be understood that in the 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.

[0253] In the several embodiments provided in the present application, it should be understood that the disclosed methods, devices and systems can be implemented in other ways. For example, the device embodiments described above are merely schematic; for example, the division of the units is only a logical function division, and there may be other division methods in actual implementation; for example, 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.

[0254] 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.

[0255] In addition, each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may be physically included separately, or two or more units may be integrated into one unit. The above-mentioned integrated unit may be implemented in the form of hardware or in the form of hardware plus software functional units. For example, for each device or product applied to or integrated in a chip, each module / unit contained therein may be implemented in the form of hardware such as circuits, or at least some of the modules / units may be implemented in the form of software programs, which run on a processor integrated inside the chip, and the remaining (if any) modules / units may be implemented in the form of hardware such as circuits; for each device or product applied to or integrated in a chip module, each module / unit contained therein may be implemented in the form of hardware such as circuits, and different modules / units may be located in the same component (such as a chip, circuit module, etc.) or different components of the chip module, or at least some of the modules / units may be It is implemented in the form of a software program, which runs on a processor integrated inside the chip module, and the remaining (if any) modules / units can be implemented in hardware such as circuits; for various devices and products applied to or integrated in the terminal equipment, the various modules / units contained therein can be implemented in hardware such as circuits, and different modules / units can be located in the same component (for example, chip, circuit module, etc.) or in different components in the terminal equipment, or, at least some modules / units can be implemented in the form of a software program, which runs on a processor integrated inside the terminal equipment, and the remaining (if any) modules / units can be implemented in hardware such as circuits.

[0256] The above-mentioned integrated unit implemented in the form of a software functional unit can be stored in a computer-readable storage medium. The above-mentioned software functional unit is stored in a storage medium, including a number of instructions for a computer device (which can be a personal computer, a server, or a network device, etc.) to perform some steps of the method described in each embodiment of the present application. The aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (Read-Only Memory, ROM), random access memory (Random Access Memory, RAM), disk or optical disk and other media that can store program codes.

[0257] Although the present application is disclosed as above, the present application is not limited thereto. Any person skilled in the art can make various changes and modifications without departing from the spirit and scope of the present application. Therefore, the protection scope of the present application shall be subject to the scope defined by the claims.

Claims

1. A communication method, characterized in that: The method comprises: receiving configuration information, the configuration information comprising at least two sets of physical random access channel (PRACH) resource configurations, a first set of PRACH resource configurations in the at least two sets of PRACH resource configurations corresponding to a first PRACH format, and a second set of PRACH resource configurations in the at least two sets of PRACH resource configurations corresponding to a second PRACH format; A random access preamble is sent using a target PRACH resource configuration, where the target PRACH resource configuration is one of the at least two sets of PRACH resource configurations.

2. The communication method according to claim 1, characterized in that: The time domain width occupied by the PRACH resources in the first set of PRACH resources is greater than the time domain width occupied by the PRACH resources in the second set of PRACH resources, and / or the frequency domain width occupied by the PRACH resources in the first set of PRACH resources is greater than the frequency domain width occupied by the PRACH resources in the second set of PRACH resources; The first set of PRACH resources refers to a set of PRACH resources configured by the first set of PRACH resource configuration, and the second set of PRACH resources refers to a set of PRACH resources configured by the second set of PRACH resource configuration.

3. The communication method according to claim 1 or 2, characterized in that: The first set of PRACH resource configurations is used for random access in a radio link control RRC non-connected state, and the second set of PRACH resource configurations is used for an access process in an RRC connected state.

4. The communication method according to claim 1, characterized in that: The method further comprises: First indication information is received, where the first indication information is used to indicate the target PRACH resource configuration.

5. The communication method according to claim 4, characterized in that: The receiving first indication information comprises: receiving a media access control-control element MAC CE signaling, where the MAC CE signaling includes the first indication information; or; Downlink control information DCI is received, where the DCI includes the first indication information.

6. The communication method according to claim 1, characterized in that: The method further comprises: Second indication information is received, where the second indication information is used to indicate switching of PRACH resource configuration.

7. The communication method according to claim 6, characterized in that: The receiving the second indication information includes: receiving MAC CE signaling, where the MAC CE signaling includes the second indication information; Alternatively, receive DCI, where the DCI includes the second indication information.

8. The communication method according to claim 5 or 7, characterized in that: The DCI is a physical downlink control channel PDCCH command.

9. A communication method, characterized in that: The method comprises: Sending configuration information, the configuration information comprising at least two sets of physical random access channel (PRACH) resource configurations, a first set of PRACH resource configurations in the at least two sets of PRACH resource configurations corresponding to a first PRACH format, and a second set of PRACH resource configurations in the at least two sets of PRACH resource configurations corresponding to a second PRACH format; A random access preamble is received using a target PRACH resource configuration, where the target PRACH resource configuration is one of the at least two sets of PRACH resource configurations.

10. The communication method according to claim 9, characterized in that: The time domain width occupied by the PRACH resources in the first set of PRACH resources is greater than the time domain width occupied by the PRACH resources in the second set of PRACH resources, and / or the frequency domain width occupied by the PRACH resources in the first set of PRACH resources is greater than the frequency domain width occupied by the PRACH resources in the second set of PRACH resources; The first set of PRACH resources refers to a set of PRACH resources configured by the first set of PRACH resource configuration, and the second set of PRACH resources refers to a set of PRACH resources configured by the second set of PRACH resource configuration.

11. The communication method according to claim 9 or 10, characterized in that: The first set of PRACH resource configurations is used for random access in a radio link control RRC non-connected state, and the second set of PRACH resource configurations is used for an access process in an RRC connected state.

12. The communication method according to claim 9, characterized in that: The method further comprises: Sending first indication information, where the first indication information is used to indicate the target PRACH resource configuration.

13. The communication method according to claim 12, characterized in that: The sending of the first indication information includes: Sending a media access control-control element MAC CE signaling, where the MAC CE signaling includes the first indication information; or; Send downlink control information DCI, where the DCI includes the first indication information.

14. The communication method according to claim 9, characterized in that: The method further comprises: Send second indication information, where the second indication information is used to indicate switching of PRACH resource configuration.

15. The communication method according to claim 14, characterized in that: The sending of the second indication information includes: Sending MAC CE signaling, where the MAC CE signaling includes the second indication information; Alternatively, a DCI is sent, where the DCI includes the second indication information.

16. The communication method according to claim 13 or 15, characterized in that: The DCI is a physical downlink control channel PDCCH command.

17. A communication method, characterized in that: The method comprises: Indication information is sent on a first resource, where the indication information is used to indicate that a second resource is used to initiate random access, where the second resource is later than the first resource in a time domain.

18. The communication method according to claim 17, characterized in that: The first resource is a physical uplink control channel PUCCH resource, and the second resource is a PRACH resource.

19. The communication method according to claim 17, characterized in that: The first resource is a first PRACH resource, and the second resource is a second PRACH resource.

20. The communication method according to claim 19, characterized in that: The first PRACH resource and the second PRACH resource are orthogonal to each other.

21. The communication method according to claim 17, 19 or 20, characterized in that: The method further comprises: Configuration information is received, where the configuration information is used to configure a first set of resources and a second set of resources, where the first resource belongs to the first set of resources and the second resource belongs to the second set of resources.

22. The communication method according to any one of claims 17 to 21, characterized in that: An interval between the second resource and the first resource in the time domain is greater than or equal to X time units, where X is a positive integer greater than or equal to 1.

23. A communication method, characterized in that: The method comprises: Indication information is received on a first resource, where the indication information is used to indicate that a second resource is used to initiate a random access, where the second resource is later than the first resource in a time domain.

24. The communication method according to claim 23, characterized in that: The first resource is a physical uplink control channel PUCCH resource, and the second resource is a PRACH resource.

25. The communication method according to claim 23, characterized in that: The first resource is a first PRACH resource, and the second resource is a second PRACH resource.

26. The communication method according to claim 25, characterized in that: The first PRACH resource and the second PRACH resource are orthogonal to each other.

27. The communication method according to claim 23, 25 or 26, characterized in that: The method further comprises: Send configuration information, where the configuration information is used to configure a first set of resources and a second set of resources, where the first resources belong to the first set of resources and the second resources belong to the second set of resources.

28. The communication method according to any one of claims 23 to 27, characterized in that: An interval between the second resource and the first resource in the time domain is greater than or equal to X time units, where X is a positive integer greater than or equal to 1.

29. A communication device, characterized in that: The device comprises: A receiving module, configured to receive configuration information, wherein the configuration information includes at least two sets of physical random access channel PRACH resource configurations, a first set of PRACH resource configurations in the at least two sets of PRACH resource configurations corresponds to a first PRACH format, and a second set of PRACH resource configurations in the at least two sets of PRACH resource configurations corresponds to a second PRACH format; The sending module is used to send a random access preamble code using a target PRACH resource configuration, where the target PRACH resource configuration is one of the at least two sets of PRACH resource configurations.

30. A communication device, characterized in that: The device comprises: a sending module, configured to send configuration information, wherein the configuration information includes at least two sets of physical random access channel (PRACH) resource configurations, wherein a first set of PRACH resource configurations in the at least two sets of PRACH resource configurations corresponds to a first PRACH format, and a second set of PRACH resource configurations in the at least two sets of PRACH resource configurations corresponds to a second PRACH format; The receiving module is used to receive a random access preamble code using a target PRACH resource configuration, where the target PRACH resource configuration is one of the at least two sets of PRACH resource configurations.

31. A communication device, characterized in that: The device comprises: A sending module is used to send indication information on a first resource, where the indication information is used to indicate the use of a second resource to initiate random access, and the second resource is later than the first resource in the time domain.

32. A communication device, characterized in that: The device comprises: The receiving module is used to receive indication information on a first resource, where the indication information is used to indicate the use of a second resource to initiate random access, where the second resource is later than the first resource in the time domain.

33. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the communication method described in any one of claims 1 to 8 is executed, or the communication method described in any one of claims 9 to 16, or the communication method described in any one of claims 17 to 22, or the communication method described in any one of claims 23 to 28 is executed.

34. A communication device, comprising a memory and a processor, wherein the memory stores a computer program that can be run on the processor, characterized in that: When the processor runs the computer program, the communication method according to any one of claims 1 to 8 or the communication method according to any one of claims 17 to 22 is performed.

35. A communication device, comprising a memory and a processor, wherein the memory stores a computer program that can be run on the processor, characterized in that: When the processor runs the computer program, the communication method according to any one of claims 9 to 16 or the communication method according to any one of claims 23 to 28 is executed.

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