Communication method, apparatus and device

Abstract

Embodiments of the present application provide a communication method, device and equipment. The method comprises: a terminal device receives N physical downlink control channel (PDCCH) commands on N beams, wherein the PDCCH commands are used to trigger the terminal device to perform random access, and N is an integer greater than 1; and the terminal device receives M PDCCHs scrambled by M RA-RNTIs on M beams corresponding to the N beams, wherein M is an integer greater than or equal to 1. The reliability of communication is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of communication, and in particular to a communication method, device and equipment. BACKGROUND

[0002] The network device can send a physical downlink control channel (PDCCH) order to the terminal device, so that the terminal device performs random access according to the PDCCH order.

[0003] After the terminal device successfully performs random access, the network device can send a PDCCH (carrying DCI) scrambled by the RA-RNTI to the terminal device to schedule the terminal device to perform data transmission. In order to improve the reliability of the terminal device receiving the PDCCH, the network device can repeatedly send the PDCCH order multiple times through beams in different directions to the terminal device, and repeatedly send the PDCCH scrambled by the RA-RNTI multiple times through beams in different directions to the terminal device. However, the terminal device cannot determine on which beams to receive the PDCCH scrambled by the RA-RNTI, resulting in low reliability of communication. SUMMARY

[0004] Embodiments of the present application provide a communication method, device and equipment, which improves the reliability of communication.

[0005] In a first aspect, embodiments of the present application provide a communication method, comprising:

[0006] The terminal device receives N PDCCH orders on N beams, the PDCCH order being used to trigger the terminal device to perform random access, and N being an integer greater than 1;

[0007] The terminal device receives M PDCCHs scrambled by the RA-RNTI on M beams corresponding to the N beams, and M being an integer greater than or equal to 1.

[0008] In a possible implementation, M is 1, or M is equal to N.

[0009] In a possible implementation, M is 1, and the beam direction of the M beams is the same as the beam direction of the beam corresponding to the first PDCCH order.

[0010] Among the N PDCCH orders, the first PDCCH order corresponds to a search space with the largest identifier, or the first PDCCH order corresponds to a search space with the smallest identifier.

[0011] In a possible implementation, the beam corresponding to the first PDCCH command is: a beam corresponding to a control resource set where a first PDCCH candidate is located, the first PDCCH candidate being a PDCCH repetition transmission candidate corresponding to the first PDCCH command.

[0012] In a possible implementation, the M is 1, and a beam direction of the M beams is the same as a beam direction corresponding to a second PDCCH command.

[0013] In the N PDCCH commands, a starting time domain resource of the second PDCCH command is earliest, or an ending time domain resource of the second PDCCH command is latest, or the starting time domain resource of the second PDCCH command is latest, or the ending time domain resource of the second PDCCH command is earliest.

[0014] In a possible implementation, the M is 1, and the M beams are beams corresponding to a first control resource set in a first time slot.

[0015] The first time slot is a time slot closest to a time slot where the M PDCCHs scrambled by the M RA-RNTIs are located, and the first control resource set is a smallest control resource set in the first time slot.

[0016] In a possible implementation, the M is the same as the N, and a beam direction of an i-th beam in the M beams is the same as a beam direction of an i-th beam in the N beams.

[0017] The time domain resources where the M beams are located are arranged in an order from early to late in starting time, and the time domain resources where the N beams are located are arranged in an order from early to late in starting time.

[0018] In a possible implementation, the M is the same as the N, and a beam direction of an i-th beam in the M beams is the same as a beam direction of an i-th beam in the N beams.

[0019] The time domain resources where the M beams are located are arranged in an order from early to late in time, and the N beams are arranged in an order from small to large in identification of corresponding search spaces, or the N beams are arranged in an order from large to small in identification of corresponding search spaces.

[0020] In a possible implementation, the M is the same as the N.

[0021] For any one of the M beams, the M beams are beams corresponding to a second control resource set in a second time slot.

[0022] The second time slot is a time slot closest to a time slot in which a control resource set is configured, and a starting time domain resource position of a PDCCH scrambled by the M RA-RNTIs is earliest in the PDCCH. The second control resource set is a control resource set with a smallest identifier in the second time slot.

[0023] In a possible implementation, the N is 2.

[0024] In a possible implementation, a beam of a physical downlink shared channel PDSCH scheduled by the PDCCH scrambled by the RA-RNTI can be determined according to any one of the following criteria:

[0025] Criterion one, a beam direction of the beam of the PDSCH scheduled by the PDCCH scrambled by the RA-RNTI is same as a beam direction of a beam corresponding to a first PDCCH command, wherein, in the N PDCCH commands, an identifier of a search space corresponding to the first PDCCH command is largest, or the identifier of the search space corresponding to the first PDCCH command is smallest.

[0026] Criterion two, the beam direction of the beam of the PDSCH scheduled by the PDCCH scrambled by the RA-RNTI is same as a beam direction of a beam corresponding to a second PDCCH command, wherein, in the N PDCCH commands, a starting time domain resource of the second PDCCH command is earliest, or an ending time domain resource of the second PDCCH command is latest, or the starting time domain resource of the second PDCCH command is latest, or the ending time domain resource of the second PDCCH command is earliest.

[0027] Criterion three, when a PDCCH command adopts a transmission mode of repeated transmission, the beam of the PDSCH scheduled by the PDCCH scrambled by the RA-RNTI is a beam corresponding to a first control resource set in a first time slot, wherein, the first time slot is a time slot closest to a time slot in which a control resource set is configured, and a starting time domain resource position of a PDCCH scrambled by the M RA-RNTIs is earliest in the PDCCH. The first control resource set is a control resource set with a smallest identifier in the first time slot.

[0028] In a second aspect, the present application provides a communication apparatus, comprising a first receiving module and a second receiving module, wherein,

[0029] The first receiving module is configured to receive, by a terminal device, N physical downlink control channel PDCCH commands on N beams, the PDCCH commands being used to trigger the terminal device to perform random access, and the N being an integer greater than 1.

[0030] The second receiving module is configured to receive, by the terminal device, M PDCCHs scrambled by RA-RNTIs on M beams corresponding to the N beams, the M being an integer greater than or equal to 1.

[0031] In a possible implementation, the M is 1, or the M is equal to the N.

[0032] In a possible implementation, the M is 1, and a beam direction of the M beams is the same as a beam direction of a beam corresponding to the first PDCCH order.

[0033] In a possible implementation, in the N PDCCH orders, an identity of a search space corresponding to the first PDCCH order is maximum, or an identity of a search space corresponding to the first PDCCH order is minimum.

[0034] In a possible implementation, the beam corresponding to the first PDCCH order is a beam corresponding to a control resource set in which a first PDCCH candidate is located, and the first PDCCH candidate is a PDCCH repetition transmission candidate corresponding to the first PDCCH order.

[0035] In a possible implementation, the M is 1, and a beam direction of the M beams is the same as a beam direction corresponding to the second PDCCH order.

[0036] In a possible implementation, in the N PDCCH orders, a starting time domain resource of the second PDCCH order is earliest, or an ending time domain resource of the second PDCCH order is latest, or a starting time domain resource of the second PDCCH order is latest, or an ending time domain resource of the second PDCCH order is earliest.

[0037] In a possible implementation, the M is 1, and the M beams are beams corresponding to a first control resource set in a first time slot.

[0038] In a possible implementation, the first time slot is a time slot closest to a time slot in which the M PDCCHs scrambled by the M RA-RNTIs are located, and the first control resource set is a control resource set with a minimum identity in the first time slot.

[0039] In a possible implementation, the M is the same as the N, and a beam direction of an i th beam in the M beams is the same as a beam direction of an i th beam in the N beams.

[0040] In a possible implementation, time domain resources in which the M beams are located are arranged in an order from early to late starting time, and time domain resources in which the N beams are located are arranged in an order from early to late starting time.

[0041] In a possible implementation, the M is the same as the N, and a beam direction of an i th beam in the M beams is the same as a beam direction of an i th beam in the N beams.

[0042] The time domain resources where the M beams are located are arranged in time from early to late order; the N beams are arranged in order from small to large according to the identifiers of the corresponding search spaces, or the N beams are arranged in order from large to small according to the identifiers of the corresponding search spaces.

[0043] In a possible implementation, the M is the same as the N.

[0044] For any one of the M beams, the M beams are beams corresponding to a second control resource set in a second time slot;

[0045] The second time slot is a time slot closest to a time slot where a PDCCH with an earliest starting time domain resource position in the M PDCCHs scrambled by the RA-RNTI is located, and the second control resource set is a control resource set with the smallest identifier in the second time slot.

[0046] In a possible implementation, the N is 2.

[0047] In a possible implementation, the beam of a physical downlink shared channel PDSCH scheduled by the PDCCH scrambled by the RA-RNTI can be determined according to any one of the following criteria:

[0048] Criterion one, the beam of the PDSCH scheduled by the PDCCH scrambled by the RA-RNTI is the same as the beam direction of a beam corresponding to a first PDCCH command; wherein, in the N PDCCH commands, the identifier of the search space corresponding to the first PDCCH command is the largest, or the identifier of the search space corresponding to the first PDCCH command is the smallest;

[0049] Criterion two, the beam of the PDSCH scheduled by the PDCCH scrambled by the RA-RNTI is the same as the beam direction of a beam corresponding to a second PDCCH command; wherein, in the N PDCCH commands, the starting time domain resource of the second PDCCH command is the earliest, or the ending time domain resource of the second PDCCH command is the latest, or the starting time domain resource of the second PDCCH command is the latest, or the ending time domain resource of the second PDCCH command is the earliest;

[0050] Criterion three, when the PDCCH command adopts a transmission mode of repeated transmission, the beam of the PDSCH scheduled by the PDCCH scrambled by the RA-RNTI is a beam corresponding to a first control resource set in a first time slot; wherein, the first time slot is a time slot closest to a time slot where the M PDCCHs scrambled by the RA-RNTI are located, and the first control resource set is a control resource set with the smallest identifier in the first time slot.

[0051] In a third aspect, an embodiment of the present application provides a terminal device, comprising a transceiver, a processor, and a memory;

[0052] The memory stores computer-executable instructions.

[0053] The processor executes the computer-executable instructions stored in the memory, so that the processor performs the communication method according to any one of the first aspect.

[0054] In a fourth aspect, an embodiment of the present application provides a computer-readable storage medium, which stores computer-executable instructions, and when the computer-executable instructions are executed by a processor, the computer-executable instructions are used to implement the communication method according to any one of the first aspect.

[0055] In a fifth aspect, an embodiment of the present application provides a computer program product, which comprises a computer program, and when the computer program is executed by a processor, the computer program can implement the communication method according to any one of the first aspect.

[0056] The communication method, device, and apparatus provided by the embodiments of the present application can improve the reliability of the terminal device receiving the PDCCH, and further improve the reliability of the communication.

[0057] In a sixth aspect, an embodiment of the present application provides a communication method, comprising:

[0058] The network device sends N physical downlink control channel (PDCCH) commands on N beams, wherein the PDCCH commands are used to trigger a terminal device to perform random access, and N is an integer greater than 1.

[0059] The network device sends M RA-RNTI scrambled PDCCHs on M beams corresponding to the N beams, and M is an integer greater than or equal to 1.

[0060] In a possible implementation, M is 1, or M is equal to N.

[0061] In a possible implementation, M is 1, and the beam direction of the M beams is the same as the beam direction of the beam corresponding to the first PDCCH command.

[0062] Among the N PDCCH commands, the search space corresponding to the first PDCCH command has the largest identifier, or the search space corresponding to the first PDCCH command has the smallest identifier.

[0063] In one possible implementation, the beam corresponding to the first PDCCH command is the beam corresponding to the control resource set where the first PDCCH candidate is located, and the first PDCCH candidate is the PDCCH retransmission candidate corresponding to the first PDCCH command.

[0064] In one possible implementation, M is 1, and the beam directions of the M beams are the same as the beam directions corresponding to the second PDCCH command.

[0065] Among the N PDCCH commands, the second PDCCH command has the earliest start time domain resource, or the second PDCCH command has the latest end time domain resource, or the second PDCCH command has the latest start time domain resource, or the second PDCCH command has the earliest end time domain resource.

[0066] In one possible implementation, M is 1, and the M beams are the beams corresponding to the first control resource set in the first time slot;

[0067] Wherein, the first time slot is the time slot with the control resource set configured closest to the time slot where the M RA-RNTI scrambled PDCCHs are located, and the first control resource set is the control resource set with the smallest identifier in the first time slot.

[0068] In one possible implementation, M is the same as N; the beam direction of the i-th beam in the M beams is the same as the beam direction of the i-th beam in the N beams.

[0069] The time-domain resources of the M beams are arranged in order of their start times from earliest to latest; the time-domain resources of the N beams are arranged in order of their start times from earliest to latest.

[0070] In one possible implementation, M is the same as N; the beam direction of the i-th beam in the M beams is the same as the beam direction of the i-th beam in the N beams.

[0071] The time-domain resources of the M beams are arranged in order from early to late time; the N beams are arranged in order from smallest to largest according to the identifier of the corresponding search space, or the N beams are arranged in order from largest to smallest according to the identifier of the corresponding search space.

[0072] In one possible implementation, M is the same as N;

[0073] For any one of the M beams, the M beams are the beams corresponding to the second control resource set in the second time slot;

[0074] The second time slot is a time slot closest to a time slot in which a control resource set is configured, and a starting time domain resource position of a PDCCH scrambled by the M RA-RNTIs is earliest in the PDCCH. The second control resource set is a control resource set with a smallest identifier in the second time slot.

[0075] In a possible implementation, the N is 2.

[0076] In a possible implementation, a beam of a physical downlink shared channel PDSCH scheduled by the PDCCH scrambled by the RA-RNTI can be determined according to any one of the following criteria:

[0077] Criterion one, a beam direction of the beam of the PDSCH scheduled by the PDCCH scrambled by the RA-RNTI is same as a beam direction of a beam corresponding to a first PDCCH command, wherein, in the N PDCCH commands, an identifier of a search space corresponding to the first PDCCH command is maximum, or the identifier of the search space corresponding to the first PDCCH command is minimum.

[0078] Criterion two, the beam direction of the beam of the PDSCH scheduled by the PDCCH scrambled by the RA-RNTI is same as a beam direction of a beam corresponding to a second PDCCH command, wherein, in the N PDCCH commands, a starting time domain resource of the second PDCCH command is earliest, or an ending time domain resource of the second PDCCH command is latest, or the starting time domain resource of the second PDCCH command is latest, or the ending time domain resource of the second PDCCH command is earliest.

[0079] Criterion three, when a PDCCH command adopts a transmission mode of repeated transmission, the beam of the PDSCH scheduled by the PDCCH scrambled by the RA-RNTI is a beam corresponding to a first control resource set in a first time slot, wherein, the first time slot is a time slot closest to a time slot in which a control resource set is configured, and a starting time domain resource position of a PDCCH scrambled by the M RA-RNTIs is earliest in the PDCCH. The first control resource set is a control resource set with a smallest identifier in the first time slot.

[0080] In a seventh aspect, an embodiment of the present application provides a communication apparatus, comprising a first sending module and a second sending module, wherein,

[0081] The first sending module is configured to send, by a network device, N physical downlink control channel PDCCH commands on N beams, the PDCCH commands being used to trigger a terminal device to perform random access, and the N being an integer greater than 1.

[0082] The second sending module is configured to send, by the network device, M PDCCHs scrambled by RA-RNTIs on M beams corresponding to the N beams, the M being an integer greater than or equal to 1.

[0083] In a possible implementation, the M is 1, or the M is equal to the N.

[0084] In a possible implementation, the M is 1, and a beam direction of the M beams is the same as a beam direction of a beam corresponding to the first PDCCH order.

[0085] In a possible implementation, the first PDCCH order corresponds to a search space with a largest identity, or the first PDCCH order corresponds to a search space with a smallest identity.

[0086] In a possible implementation, the first PDCCH order corresponds to a beam corresponding to a first PDCCH candidate, the first PDCCH candidate being a PDCCH repetition transmission candidate corresponding to the first PDCCH order.

[0087] In a possible implementation, the M is 1, and a beam direction of the M beams is the same as a beam direction corresponding to the second PDCCH order.

[0088] In a possible implementation, the second PDCCH order has a starting time domain resource that is the earliest, or the second PDCCH order has an ending time domain resource that is the latest.

[0089] In a possible implementation, the M is 1, and the M beams are beams corresponding to a first control resource set in a first time slot.

[0090] In a possible implementation, the first time slot is a time slot closest to a time slot in which the M PDCCHs scrambled by the M RA-RNTIs are located, and the first control resource set is a control resource set with a smallest identity in the first time slot.

[0091] In a possible implementation, the M is the same as the N, and a beam direction of an i th beam in the M beams is the same as a beam direction of an i th beam in the N beams.

[0092] In a possible implementation, time domain resources in which the M beams are located are arranged in an order from early to late starting time, and time domain resources in which the N beams are located are arranged in an order from early to late starting time.

[0093] In a possible implementation, the M is the same as the N, and a beam direction of an i th beam in the M beams is the same as a beam direction of an i th beam in the N beams.

[0094] The time domain resources where the M beams are located are arranged in time from early to late order; the N beams are arranged in order from small to large according to the identifiers of the corresponding search spaces, or the N beams are arranged in order from large to small according to the identifiers of the corresponding search spaces.

[0095] In a possible implementation, the M is the same as the N.

[0096] For any one of the M beams, the M beams are beams corresponding to a second control resource set in a second time slot;

[0097] The second time slot is a time slot closest to a time slot where a PDCCH with an earliest starting time domain resource position in the M PDCCHs scrambled by the RA-RNTI is located, and the second control resource set is a control resource set with the smallest identifier in the second time slot.

[0098] In a possible implementation, the N is 2.

[0099] In a possible implementation, the beam of a physical downlink shared channel PDSCH scheduled by the PDCCH scrambled by the RA-RNTI can be determined according to any one of the following criteria:

[0100] Criterion one, the beam of the PDSCH scheduled by the PDCCH scrambled by the RA-RNTI is the same as the beam direction of a beam corresponding to a first PDCCH command; wherein, in the N PDCCH commands, the identifier of the search space corresponding to the first PDCCH command is the largest, or the identifier of the search space corresponding to the first PDCCH command is the smallest;

[0101] Criterion two, the beam of the PDSCH scheduled by the PDCCH scrambled by the RA-RNTI is the same as the beam direction of a beam corresponding to a second PDCCH command; wherein, in the N PDCCH commands, the starting time domain resource of the second PDCCH command is the earliest, or the ending time domain resource of the second PDCCH command is the latest, or the starting time domain resource of the second PDCCH command is the latest, or the ending time domain resource of the second PDCCH command is the earliest;

[0102] Criterion three, when the PDCCH command adopts a transmission mode of repeated transmission, the beam of the PDSCH scheduled by the PDCCH scrambled by the RA-RNTI is a beam corresponding to a first control resource set in a first time slot; wherein, the first time slot is a time slot configured with a control resource set closest to a time slot where the M PDCCHs scrambled by the RA-RNTI are located, and the first control resource set is a control resource set with the smallest identifier in the first time slot.

[0103] In an eighth aspect, an embodiment of the present application provides a network device, comprising a transceiver, a processor, and a memory;

[0104] The memory stores computer-executable instructions.

[0105] The processor executes the computer-executable instructions stored in the memory, so that the processor performs the communication method according to any one of the sixth aspect.

[0106] In a ninth aspect, an embodiment of the present application provides a computer-readable storage medium, which stores computer-executable instructions, and when the computer-executable instructions are executed by a processor, the computer-executable instructions are used to implement the communication method according to any one of the sixth aspect.

[0107] In a tenth aspect, an embodiment of the present application provides a computer program product, which comprises a computer program, and when the computer program is executed by a processor, the computer program can implement the communication method according to any one of the sixth aspect.

[0108] The communication method, device, and equipment provided by the embodiments of the present application can improve the reliability of the terminal device receiving the PDCCH, and further improve the reliability of the communication. BRIEF DESCRIPTION OF DRAWINGS

[0109] Figure 1 A random access procedure triggered by the PDCCH command of the embodiments of the present application is shown in the schematic diagram.

[0110] Figure 2 A flowchart of a communication method provided by the embodiments of the present application is shown in the schematic diagram.

[0111] Figure 3 A schematic diagram of a search space provided by the embodiments of the present application is shown in the schematic diagram.

[0112] Figure 4 A schematic diagram of a search space corresponding to the PDCCH scrambled by the RA-RNTI provided by the embodiments of the present application is shown in the schematic diagram.

[0113] Figure 5 A corresponding relationship between the PDCCH scrambled by the RA-RNTI and the PDCCH command provided by the embodiments of the present application is shown in the schematic diagram.

[0114] Figure 6 A structural schematic diagram of a communication device provided by the embodiments of the present application is shown in the schematic diagram.

[0115] Figure 7 A structural schematic diagram of a terminal device provided by the embodiments of the present application is shown in the schematic diagram.

[0116] Figure 8 A structural schematic diagram of a communication device provided for an embodiment of the present application is shown in FIG. 1.

[0117] Figure 9 A structural schematic diagram of a network device provided for an embodiment of the present application is shown in FIG. 2. DETAILED DESCRIPTION

[0118] In order to make the purposes, technical solutions and advantages of the present application clearer, the technical solutions in the embodiments of the present application will be described clearly and completely below in conjunction with the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the scope of protection of the present application.

[0119] In order to facilitate understanding, the concepts involved in the embodiments of the present application are first described.

[0120] Network device: a device with wireless transceiving function. It includes but is not limited to: an evolved node B (eNB or eNodeB) in long term evolution (LTE), a base station (gNodeB or gNB) or TRP in new radio (NR), a base station in a subsequent evolution system, an access node in a wireless fidelity (WiFi) system, a wireless relay node, a wireless backhaul node, etc. The base station can be: a macro base station, a micro base station, a pico base station, a small station, a relay station, or a balloon station, etc. Multiple base stations can support the network of the same technology mentioned above, or support the network of different technologies mentioned above. The base station can contain one or more co-sited or non-co-sited TRPs.

[0121] Terminal device: a device with wireless transceiver function. The terminal device can be deployed on land, including indoor or outdoor, handheld, wearable or vehicle-mounted; can also be deployed on the water surface (such as ships, etc.); can also be deployed in the air (such as airplanes, balloons and satellites, etc.). The terminal device can be a mobile phone, a tablet computer (Pad), a computer with wireless transceiver function, a virtual reality (VR) terminal device, an augmented reality (AR) terminal device, a wireless terminal in industrial control, a vehicle-mounted terminal device, a wireless terminal in self driving, a wireless terminal device in remote medical, a wireless terminal device in smart grid, a wireless terminal device in transportation safety, a wireless terminal device in smart city, a wireless terminal device in smart home, a wearable terminal device, etc. The terminal device involved in the embodiments of the present application can also be referred to as a terminal, a user equipment (UE), an access terminal device, a vehicle-mounted terminal, an industrial control terminal, a UE unit, a UE station, a mobile station, a mobile station, a remote station, a remote terminal device, a mobile device, a UE terminal device, a wireless communication device, a UE agent or a UE apparatus, etc. The terminal device can also be fixed or mobile.

[0122] Beam: The beam mentioned in the present application can refer to the reference signal indicated by QCL_typeD, or the beam corresponding to the transmission or reception of the reference signal indicated by QCL_typeD, or the reference signal indicated by QCL_typeD in the TCI-state corresponding to some channel configuration, or the reception beam or transmission beam of the reference signal indicated by QCL_typeD in the TCI-state corresponding to some channel configuration.

[0123] The embodiments of the present application apply to a PDCCH order triggered random access procedure. The network device can trigger the terminal device to initiate the random access procedure by the PDCCH order. For ease of understanding, the PDCCH order triggered random access procedure is described below in combination with the following figures. Figure 1 The PDCCH order triggered random access procedure is described.

[0124] Figure 1 The PDCCH order triggered random access procedure is described. Figure 1 The access procedure can include:

[0125] S101, the network device sends a PDCCH command to the terminal device.

[0126] To improve the reliability of the terminal device receiving the PDCCH command, the network device can repeatedly send the PDCCH command multiple times. Among them, multiple repeated transmission of the PDCCH command can correspond to different beam directions.

[0127] S102, the terminal device sends a random access request to the network device according to the PDCCH command.

[0128] After the terminal device receives the PDCCH command, the PDCCH command triggers the terminal device to send a random access request to the network device.

[0129] S103, the network device sends a random access response to the terminal device.

[0130] After the terminal device receives the random access response, the terminal device successfully performs random access.

[0131] After the terminal device successfully performs random access, the network device can repeatedly send multiple PDCCHs scrambled by random access radio network temporary identifiers (RA-RNTIs) to the terminal device through beams in different directions. The beams corresponding to the multiple RA-RNTI scrambled PDCCHs need to have a certain correspondence with the beams corresponding to the PDCCH command. At the same time, the physical downlink shared channels (PDSCHs) scheduled by the multiple RA-RNTI scrambled PDCCHs also need to have a certain correspondence with the beams corresponding to the PDCCH command.

[0132] In related technologies, after the network device sends RA-RNTI scrambled PDCCHs in different beam directions, the terminal device cannot determine on which beams to receive the RA-RNTI scrambled PDCCHs, resulting in low communication reliability.

[0133] To solve the above technical problems, before receiving the PDCCH, the terminal device first acquires the correspondence between the PDCCH command and the RA-RNTI scrambled PDCCH beams, and receives the RA-RNTI scrambled PDCCH according to the correspondence, thereby improving the reliability of the terminal device receiving the RA-RNTI scrambled PDCCH, and further improving the communication reliability.

[0134] The technical solutions shown in the present application will be described below through specific embodiments. It should be noted that the following embodiments can exist independently or can be combined with each other. For the same or similar content, the description will not be repeated in different embodiments.

[0135] Figure 2 A flowchart of a communication method provided by an embodiment of the present application is shown. Please refer to Figure 2 The method can include:

[0136] S201, the terminal device receives N repeated PDCCH commands transmitted by the network device on N beams.

[0137] Wherein, N is an integer greater than 1. For example, N can be 2.

[0138] The beam directions of the N beams can be different, and the terminal device receives one PDCCH command on one beam. The N PDCCH commands are the same command, and each PDCCH command is used to trigger the terminal device to perform the same random access.

[0139] For example, assuming N is 2, the terminal device can receive one PDCCH command 1 on beam 1 and one PDCCH command 2 on beam 2. The beam directions of beam 1 and beam 2 can be different, and PDCCH command 1 and PDCCH command 2 are the same.

[0140] S202, the terminal device receives M RA-RNTI scrambled PDCCHs transmitted by the network device on M beams corresponding to the N beams.

[0141] Wherein, M is an integer greater than or equal to 1; optionally, M is 1, or M is equal to N.

[0142] The RA-RNTI scrambled PDCCH is used to transmit downlink control information (DCI), and the DCI is used to schedule a physical downlink shared channel (PDSCH).

[0143] The M beams corresponding to the N beams means that the N beams and the M beams satisfy a predetermined criterion to ensure consistency between the N beams and the M beams. When the size relationship between M and N is different, the consistency is also different, which can include the following two cases:

[0144] Case 1, N is greater than 1, and M is 1.

[0145] In this case, the consistency refers to that the beam directions of the M beams are the same as the beam direction of one of the N beams. Alternatively, the beam directions of the M beams are preset beam directions.

[0146] For example, assuming that N is 2, M is 1, and the beam directions of the N beams are direction 1 and direction 2 respectively, the beam directions of the M beams are direction 1, or direction 2, or preset beam directions.

[0147] Case 2, N is greater than 1, and M is the same as N.

[0148] In this case, the consistency refers to that the beam directions of the M beams are the same as the beam directions of the N beams one by one. Alternatively, the beam directions of the M beams are preset beam directions.

[0149] For example, assuming that N is 2, M is 2, and the beam directions of the N beams are direction 1 and direction 2 respectively, the beam directions of the M beams are direction 1 and direction 2 respectively, or the beam directions of the M beams are preset beam directions.

[0150] Before the terminal device receives the N PDCCH commands and the M RA-RNTI scrambled PDCCHs, the terminal device obtains network configuration information, which can include the N beams and the M beams. Correspondingly, the terminal device can receive the N PDCCH commands on the N beams and the M RA-RNTI scrambled PDCCHs on the M beams according to the network configuration information. The N beams and the M beams satisfy a predetermined criterion to ensure the consistency between the beams corresponding to the PDCCH commands and the beams corresponding to the RA-RNTI scrambled PDCCHs.

[0151] In the embodiment shown in FIG. 1, the terminal device receives the PDCCHs after obtaining the correspondence between the PDCCH commands and the beams on which the RA-RNTI scrambled PDCCHs are located, and receives the RA-RNTI scrambled PDCCHs according to the correspondence, thereby improving the reliability of the terminal device in receiving the RA-RNTI scrambled PDCCHs, and further improving the reliability of the communication. Figure 2 In the embodiment shown in FIG. 1, the terminal device receives the PDCCHs after obtaining the correspondence between the PDCCH commands and the beams on which the RA-RNTI scrambled PDCCHs are located, and receives the RA-RNTI scrambled PDCCHs according to the correspondence, thereby improving the reliability of the terminal device in receiving the RA-RNTI scrambled PDCCHs, and further improving the reliability of the communication.

[0152] Figure 2 In the embodiment shown in FIG. 1, when the size relationship between M and N is different, the predetermined criterion (correspondence) satisfied between the M beams and the N beams is different, including the following two cases:

[0153] First case, M is 1.

[0154] ​In this case, the network device sends multiple PDCCH orders to the terminal device, and sends a PDCCH scrambled by an RA-RNTI to the terminal device. The beam direction of the PDCCH scrambled by the RA-RNTI needs to be consistent with the beam direction corresponding to the multiple PDCCH orders.

[0155] In this case, the beam direction of the M beams and the beam direction of the N beams satisfy at least one of the following three criteria:

[0156] Criterion one: the PDCCH scrambled by the RA-RNTI has the same beam direction as the beam direction corresponding to the first PDCCH order. Among the N PDCCH orders, the search space corresponding to the first PDCCH order has the largest identifier, or the search space corresponding to the first PDCCH order has the smallest identifier.

[0157] Each of the N PDCCH orders has a corresponding search space (SS). The search space corresponding to the PDCCH order refers to the search space in which the PDCCH candidate corresponding to the PDCCH order is located.

[0158] The beam corresponding to the first PDCCH order is the beam corresponding to the control resource set in which the first PDCCH candidate is located. The first PDCCH candidate is the PDCCH order repetition candidate corresponding to the first PDCCH order.

[0159] For example, N is 3, and the three PDCCH orders are respectively PDCCH order 1, PDCCH order 2, and PDCCH order 3. The search spaces corresponding to the three PDCCH orders are different, PDCCH order 1 corresponds to search space 1, PDCCH order 2 corresponds to search space 2, and PDCCH order 3 corresponds to search space 3. Among the three search spaces, search space 1 has the smallest identifier, and search space 3 has the largest identifier. The beam direction of the PDCCH scrambled by the RA-RNTI can be the same as the beam direction corresponding to PDCCH order 1, or the beam direction of the PDCCH scrambled by the RA-RNTI can be the same as the beam direction corresponding to PDCCH order 3.

[0160] Next, taking N as 2 and M as 1 as an example, criterion one is described through a specific example in combination with Figure 3

[0161] Figure 3 A schematic diagram of a search space provided by an embodiment of the present application. Please refer to​Figure 3 The horizontal axis represents the time domain, and the vertical axis represents the frequency domain.

[0162] The network device sends two PDCCH commands and a PDCCH scrambled by the RA-RNTI to the terminal device, and the two PDCCH commands are PDCCH order1 and PDCCH order2. The PDCCH candidate corresponding to PDCCH order1 is located in CORSET1 in search space 1, and the beam corresponding to PDCCH order1 is beam 1 corresponding to CORSET1. The PDCCH candidate corresponding to PDCCH order2 is located in CORSET2 in search space 2, and the beam corresponding to PDCCH order2 is beam 2 corresponding to CORSET2.

[0163] Assuming that the identifier of search space 1 is less than the identifier of search space 2, the beam direction of the beam corresponding to the PDCCH scrambled by the RA-RNTI is the same as the beam direction of beam 1.

[0164] Criterion two, the beam direction of the beam corresponding to the PDCCH scrambled by the RA-RNTI is the same as the beam direction of the beam corresponding to the second PDCCH command. Among the N PDCCH commands, the starting time domain resource of the second PDCCH command is the earliest, or the ending time domain resource of the second PDCCH command is the latest, or the starting time domain resource of the second PDCCH command is the latest, or the ending time domain resource of the second PDCCH command is the earliest.

[0165] Each of the N PDCCH commands has its corresponding time domain resource, and the time domain resource corresponding to the PDCCH command refers to the time domain resource of the PDCCH candidate corresponding to the PDCCH command.

[0166] For example, N is 3, and the three PDCCH commands are PDCCH order 1, PDCCH order2, and PDCCH order3. The three PDCCH commands correspond to different time domain resources, PDCCH order 1 corresponds to time domain resource 1, PDCCH order 2 corresponds to time domain resource 2, and PDCCH order 3 corresponds to time domain resource 3. Among the three time domain resources, the starting time domain resource of time domain resource 1 is the earliest, and the ending time domain resource of time domain resource 3 is the latest. The beam direction of the PDCCH scrambled by the RA-RNTI can be the same as the beam direction of the beam corresponding to PDCCH order1, or the beam direction of the PDCCH scrambled by the RA-RNTI can be the same as the beam direction of the beam corresponding to PDCCH order3.

[0167] Criterion three, the M beams are beams corresponding to a control resource set in a first time slot; wherein the first time slot is a time slot closest to a time slot in which the PDCCH scrambled by the M RA-RNTIs is located, and the first control resource set is a control resource set with the smallest index in the first time slot.

[0168] The first time slot can include multiple control resource sets.

[0169] The time slot closest to the time slot in which the PDCCH scrambled by the M RA-RNTIs is located refers to a time slot located before the time slot in which the PDCCH scrambled by the M RA-RNTIs is located, and having the smallest time difference between the time slot in which the PDCCH scrambled by the M RA-RNTIs is located.

[0170] In the following, criterion three is described through specific examples. Figure 4

[0171] Figure 4 An example of the PDCCH scrambled by the RA-RNTI provided in the embodiments of the present application is shown in FIG. 1. Referring to FIG. 1, Figure 4 the abscissa represents the time domain, and the ordinate represents the frequency domain. The time domain includes multiple time slots (slots), for example, Figure 4 four time slots, slot1, slot2, slot3 and slot4, are shown in FIG. 1. The frequency domain includes multiple control resource sets (CORESETs), for example, Figure 4 CORESET1 and CORESET2 are shown in FIG. 1. It is assumed that the PDCCH scrambled by the RA-RNTI is located in slot3, and the frequency domain resource in which the PDCCH scrambled by the RA-RNTI is located is CORESET1. slot2 is a time slot located before slot3 and closest to slot3, and thus it can be determined that the M beams (beams corresponding to the PDCCH scrambled by the RA-RNTI) are beams corresponding to CORESET1 in slot2.

[0172] In the second case, M is equal to N, and both M and N are integers greater than 1.

[0173] In this case, the network device sends multiple PDCCH commands to the terminal device, and sends multiple repeatedly transmitted PDCCHs scrambled by the RA-RNTI to the terminal device. The beams corresponding to the multiple repeatedly transmitted PDCCHs scrambled by the RA-RNTI and the beams corresponding to the multiple PDCCH commands need to be consistent.

[0174] In this case, the beam directions of the M beams and the beam directions of the N beams satisfy at least one of the following three criteria:

[0175] ​The time domain resources where the M beams are located are arranged in ascending order of starting time; the time domain resources where the N beams are located are arranged in ascending order of starting time; the beam direction of the i th beam in the sorted M beams is the same as the beam direction of the i th beam in the sorted N beams.

[0176] For example, if N is 2 and M is 2,

[0177] For the convenience of understanding, the following will be described in combination with Figure 5 The criterion one is described through a specific example.

[0178] Figure 5 The correspondence between the PDCCH scrambled by the RA-RNTI and the PDCCH order provided by the embodiment of the present application is shown in the schematic diagram. Please refer to Figure 5 The horizontal coordinate represents the time domain and the vertical coordinate represents the frequency domain.

[0179] The two PDCCH orders are arranged in ascending order of starting time of time domain resources as: PDCCH order 1, PDCCH order 2; the two PDCCHs scrambled by the RA-RNTI are arranged in ascending order of starting time of time domain resources as: PDCCH RA-RNTI 1, PDCCH RA-RNTI 2; according to the sorting sequence in ascending order of starting time of time domain resources, it can be determined that the beam direction of the PDCCH order 1 is the same as the beam direction of the PDCCH RA-RNTI 1, and the beam direction of the PDCCH order 2 is the same as the beam direction of the PDCCH RA-RNTI 2.

[0180] The criterion two is that the time domain resources where the M beams are located are arranged in ascending order of time; the N beams are arranged in ascending order of the identifier of the corresponding search space, or the N beams are arranged in descending order of the identifier of the corresponding search space; the beam direction of the i th beam in the sorted M beams is the same as the beam direction of the i th beam in the sorted N beams.

[0181] For example, it is assumed that M is 2, N is 2, and the two PDCCH orders are arranged in ascending order of starting time of time domain resources as: PDCCH order 1, PDCCH order 2; the two PDCCHs scrambled by the RA-RNTI are arranged in descending order of the identifier of the corresponding search space as: PDCCH RA-RNTI 2, PDCCH RA-RNTI 1; according to the sorting sequence, it can be determined that the beam direction of the PDCCH order 1 is the same as the beam direction of the PDCCH RA-RNTI 2, and the beam direction of the PDCCH order 2 is the same as the beam direction of the PDCCH RA-RNTI 1.

[0182] Criterion 3: For any one of the M beams, the M beams are the beams corresponding to the second control resource set in the second time slot; the second time slot is the time slot with the control resource set configured closest to the time slot of the PDCCH with the earliest starting time domain resource position among the M RA-RNTI scrambled PDCCHs; the second control resource set is the control resource set with the smallest identifier in the second time slot.

[0183] For specific implementation details of this guideline, please refer to the specific implementation details of Guideline 3 in Case 1, which will not be repeated here.

[0184] Figures 2-5 The illustrated embodiment demonstrates the correspondence between the beam of the PDCCH command and the beam of the RA-RNTI scrambled PDCCH. The following specific examples illustrate the correspondence between the beam of the PDSCH scheduled by the RA-RNTI scrambled PDCCH and the beam of the PDCCH command.

[0185] The beam of the PDSCH scheduled by the RA-RNTI scrambled PDCCH can be determined by any of the following criteria:

[0186] Rule 1: The beam direction of the PDSCH scheduled by the RA-RNTI scrambled PDCCH is the same as that of the beam corresponding to the first PDCCH command.

[0187] Among the N PDCCH commands, the search space identifier corresponding to the first PDCCH command is either the largest or the smallest.

[0188] For example, if N is 3, the three PDCCH commands are designated as PDCCH order 1, PDCCH order 2, and PDCCH order 3. The search spaces corresponding to these three PDCCH commands are different: PDCCH order 1 corresponds to search space 1, PDCCH order 2 to search space 2, and PDCCH order 3 to search space 3. Among the three search spaces, search space 1 has the smallest identifier, and search space 3 has the largest identifier. The beam direction of the PDSCH scheduled by the RA-RNTI scrambled PDCCH can be the same as the beam direction corresponding to PDCCH order 1, or the beam direction of the PDSCH scheduled by the RA-RNTI scrambled PDCCH can be the same as the beam direction corresponding to PDCCH order 3.

[0189] Rule 2: The beam of the PDSCH scheduled by the RA-RNTI scrambled PDCCH is the same as the beam direction corresponding to the second PDCCH command.

[0190] Among the N PDCCH commands, the starting time domain resource of the second PDCCH command is the earliest, or the ending time domain resource of the second PDCCH command is the latest, or the starting time domain resource of the second PDCCH command is the latest, or the ending time domain resource of the second PDCCH command is the earliest.

[0191] N is 3, and the three PDCCH commands are respectively PDCCH order 1, PDCCH order 2 and PDCCH order 3; the time domain resources corresponding to the three PDCCH commands are different, PDCCH order 1 corresponds to time domain resource 1, PDCCH order 2 corresponds to time domain resource 2, and PDCCH order 3 corresponds to time domain resource 3. Among the three time domain resources, the starting time domain resource of time domain resource 1 is the earliest, and the ending time domain resource of time domain resource 3 is the latest. The beam direction of the PDSCH scheduled by the PDCCH scrambled by the RA-RNTI can be the same as the beam direction of the beam corresponding to PDCCH order 1, or the beam direction of the PDSCH scheduled by the PDCCH scrambled by the RA-RNTI can be the same as the beam direction of the beam corresponding to PDCCH order 3.

[0192] Criterion three, when the PDCCH command adopts the transmission mode of repeated transmission, the beam of the PDSCH scheduled by the PDCCH scrambled by the RA-RNTI is the beam corresponding to the first control resource set in the first time slot;

[0193] Among them, the first time slot is the time slot closest to the time slot where the M PDCCHs scrambled by the RA-RNTI are located and configured with a control resource set, and the first control resource set is the control resource set with the smallest identifier in the first time slot.

[0194] The specific implementation in this criterion can refer to the specific implementation of criterion three in case one, which will not be described here. Figure 6 A structure schematic diagram of a communication device provided by an embodiment of the present application. Please refer to Figure 6 The communication device 10 can include a first receiving module 11 and a second receiving module 12, wherein,

[0195] The first receiving module 11 is configured to receive N physical downlink control channel (PDCCH) commands on N beams by a terminal device, wherein the PDCCH commands are used to trigger the terminal device to perform random access, and N is an integer greater than 1.

[0196] The second receiving module 12 is configured to receive M PDCCHs scrambled by the RA-RNTI on M beams corresponding to the N beams by the terminal device, and M is an integer greater than or equal to 1.

[0197] The communication apparatus provided in the embodiments of the present application can execute the technical solutions shown in the method embodiments, and the implementation principles and beneficial effects are similar, which will not be repeated here.

[0198] In a possible implementation, the M is 1, or the M is equal to the N.

[0199] In a possible implementation, the M is 1, and a beam direction of the M beams is the same as a beam direction of a beam corresponding to the first PDCCH command.

[0200] In the N PDCCH commands, an identity of a search space corresponding to the first PDCCH command is maximum, or an identity of a search space corresponding to the first PDCCH command is minimum.

[0201] In a possible implementation, the beam corresponding to the first PDCCH command is a beam corresponding to a control resource set in which a first PDCCH candidate is located, and the first PDCCH candidate is a PDCCH repetition transmission candidate corresponding to the first PDCCH command.

[0202] In a possible implementation, the M is 1, and a beam direction of the M beams is the same as a beam direction corresponding to the second PDCCH command.

[0203] In the N PDCCH commands, a starting time domain resource of the second PDCCH command is earliest, or an ending time domain resource of the second PDCCH command is latest, or a starting time domain resource of the second PDCCH command is latest, or an ending time domain resource of the second PDCCH command is earliest.

[0204] In a possible implementation, the M is 1, and the M beams are beams corresponding to a first control resource set in a first time slot.

[0205] In the N PDCCH commands, a starting time domain resource of the second PDCCH command is earliest, or an ending time domain resource of the second PDCCH command is latest, or a starting time domain resource of the second PDCCH command is latest, or an ending time domain resource of the second PDCCH command is earliest.

[0206] In a possible implementation, the M is the same as the N, and a beam direction of an i th beam in the M beams is the same as a beam direction of an i th beam in the N beams.

[0207] In the N PDCCH commands, an identity of a search space corresponding to the first PDCCH command is maximum, or an identity of a search space corresponding to the first PDCCH command is minimum.

[0208] In a possible implementation, the M is the same as the N; a beam direction of an i-th beam in the M beams is the same as a beam direction of an i-th beam in the N beams.

[0209] The M beams are arranged in time domain resources in an order from early to late in time; the N beams are arranged in an order from small to large in an identifier of a corresponding search space, or the N beams are arranged in an order from large to small in the identifier of the corresponding search space.

[0210] In a possible implementation, the M is the same as the N.

[0211] For any one of the M beams, the M beams are beams corresponding to a second control resource set in a second time slot;

[0212] The second time slot is a time slot closest to a time slot in which a PDCCH with an earliest starting time domain resource position in the M RA-RNTI scrambled PDCCHs is located, and the second control resource set is a control resource set with a smallest identifier in the second time slot.

[0213] In a possible implementation, the N is 2.

[0214] In a possible implementation, a beam of a physical downlink shared channel PDSCH scheduled by the RA-RNTI scrambled PDCCH can be determined according to any one of the following criteria:

[0215] Criterion one, a beam of the PDSCH scheduled by the RA-RNTI scrambled PDCCH is the same as a beam direction of a first PDCCH command; wherein, in the N PDCCH commands, an identifier of a search space corresponding to the first PDCCH command is the largest, or the identifier of the search space corresponding to the first PDCCH command is the smallest.

[0216] Criterion two, a beam of the PDSCH scheduled by the RA-RNTI scrambled PDCCH is the same as a beam direction of a second PDCCH command; wherein, in the N PDCCH commands, a starting time domain resource of the second PDCCH command is the earliest, or an ending time domain resource of the second PDCCH command is the latest, or the starting time domain resource of the second PDCCH command is the latest, or the ending time domain resource of the second PDCCH command is the earliest.

[0217] Criterion three, when the PDCCH command adopts a transmission mode of repeated transmission, the beam of the PDSCH scheduled by the PDCCH scrambled by the RA-RNTI is the beam corresponding to the first control resource set in the first time slot; wherein the first time slot is the time slot closest to the time slot where the PDCCH scrambled by the M RA-RNTIs is located and configured with a control resource set, and the first control resource set is the control resource set with the smallest identifier in the first time slot.

[0218] Figure 7 A structural diagram of a terminal device is provided for the embodiments of the present application. Please refer to Figure 7 The terminal device 20 can include a transceiver 21, a memory 22, and a processor 23. The transceiver 21 can include a transmitter and / or a receiver. The transmitter can also be referred to as a sender, a transmitter, a transmission port, or a transmission interface, and the like. The receiver can also be referred to as a receiver, a receiver, a receiving port, or a receiving interface, and the like. Exemplarily, the transceiver 21, the memory 22, and the processor 23 are connected to each other through a bus 24.

[0219] The memory 22 is configured to store program instructions.

[0220] The processor 23 is configured to execute the program instructions stored in the memory, so that the terminal device 20 performs any of the above-mentioned communication methods.

[0221] The transceiver 21 is configured to perform the transceiving function of the terminal device 20 in the above-mentioned communication method.

[0222] Figure 8 A structural diagram of a communication apparatus is provided for the embodiments of the present application. Please refer to Figure 8 The communication apparatus 30 can include a first sending module 31 and a second sending module 32, wherein,

[0223] The first sending module 31 is configured to send, by a network device, N physical downlink control channel (PDCCH) commands on N beams, wherein the PDCCH commands are used to trigger a terminal device to perform random access, and N is an integer greater than 1.

[0224] The second sending module 32 is configured to send, by the network device, M PDCCHs scrambled by RA-RNTIs on M beams corresponding to the N beams, wherein M is an integer greater than or equal to 1.

[0225] The communication apparatus provided by the embodiments of the present application can perform the technical solutions shown in the above method embodiments, and the implementation principles and beneficial effects are similar, which will not be described here.

[0226] In a possible implementation, M is 1, or M is equal to N.

[0227] In a possible implementation, the M is 1, and a beam direction of the M beams is the same as a beam direction of a beam corresponding to the first PDCCH command.

[0228] In the N PDCCH commands, an identity of a search space corresponding to the first PDCCH command is maximum, or an identity of a search space corresponding to the first PDCCH command is minimum.

[0229] In a possible implementation, the beam corresponding to the first PDCCH command is a beam corresponding to a control resource set in which a first PDCCH candidate is located, and the first PDCCH candidate is a PDCCH repetition transmission candidate corresponding to the first PDCCH command.

[0230] In a possible implementation, the M is 1, and a beam direction of the M beams is the same as a beam direction of a beam corresponding to the second PDCCH command.

[0231] In the N PDCCH commands, a starting time domain resource of the second PDCCH command is earliest, or an ending time domain resource of the second PDCCH command is latest, or a starting time domain resource of the second PDCCH command is latest, or an ending time domain resource of the second PDCCH command is earliest.

[0232] In a possible implementation, the M is 1, and the M beams are beams corresponding to a first control resource set in a first time slot.

[0233] In a possible implementation, the M is 1, and the M beams are beams corresponding to a first control resource set in a first time slot.

[0234] In a possible implementation, the M is the same as the N, and a beam direction of an i th beam in the M beams is the same as a beam direction of an i th beam in the N beams.

[0235] In a possible implementation, the M is the same as the N, and a beam direction of an i th beam in the M beams is the same as a beam direction of an i th beam in the N beams.

[0236] In a possible implementation, the M is the same as the N, and a beam direction of an i th beam in the M beams is the same as a beam direction of an i th beam in the N beams.

[0237] The time domain resources where the M beams are located are arranged in time from early to late order; the N beams are arranged in order from small to large according to the identifiers of the corresponding search spaces, or the N beams are arranged in order from large to small according to the identifiers of the corresponding search spaces.

[0238] In a possible implementation, the M is the same as the N.

[0239] For any one of the M beams, the M beams are beams corresponding to a second control resource set in a second time slot;

[0240] The second time slot is a time slot closest to a time slot where a PDCCH with an earliest starting time domain resource position in the M PDCCHs scrambled by the RA-RNTI is located, and the second control resource set is a control resource set with a smallest identifier in the second time slot.

[0241] In a possible implementation, the N is 2.

[0242] In a possible implementation, the beam of the physical downlink shared channel PDSCH scheduled by the PDCCH scrambled by the RA-RNTI can be determined according to any one of the following criteria:

[0243] Criterion one, the beam of the PDSCH scheduled by the PDCCH scrambled by the RA-RNTI is the same as the beam direction of a beam corresponding to a first PDCCH command; wherein, in the N PDCCH commands, the identifier of the search space corresponding to the first PDCCH command is the largest, or the identifier of the search space corresponding to the first PDCCH command is the smallest;

[0244] Criterion two, the beam of the PDSCH scheduled by the PDCCH scrambled by the RA-RNTI is the same as the beam direction of a beam corresponding to a second PDCCH command; wherein, in the N PDCCH commands, the starting time domain resource of the second PDCCH command is the earliest, or the ending time domain resource of the second PDCCH command is the latest, or the starting time domain resource of the second PDCCH command is the latest, or the ending time domain resource of the second PDCCH command is the earliest;

[0245] Criterion three, when the PDCCH command adopts a transmission mode of repeated transmission, the beam of the PDSCH scheduled by the PDCCH scrambled by the RA-RNTI is a beam corresponding to a first control resource set in a first time slot; wherein, the first time slot is a time slot closest to a time slot where the M PDCCHs scrambled by the RA-RNTI are located, and the first control resource set is a control resource set with a smallest identifier in the first time slot.

[0246] Figure 9 The structural schematic diagram of the network device provided in the embodiments of the present application is shown in FIG. 1. Please refer to FIG. 1. Figure 9 The terminal device 40 can include a transceiver 41, a memory 42, and a processor 43. The transceiver 41 can include a transmitter and / or a receiver. The transmitter can also be referred to as a sender, a transmitter, a transmitting port, a transmitting interface, or the like. The receiver can also be referred to as a receiver, a receiver, a receiving port, a receiving interface, or the like. Exemplarily, the transceiver 41, the memory 42, and the processor 43 are connected to each other through a bus 44.

[0247] The memory 42 is configured to store program instructions.

[0248] The processor 43 is configured to execute the program instructions stored in the memory, so that the network device 40 performs any of the communication methods described above.

[0249] The transceiver 41 is configured to perform the transceiving function of the network device 40 in the communication method described above.

[0250] The embodiments of the present application provide a computer readable storage medium, which stores computer execution instructions. When the computer execution instructions are executed by a processor, the computer execution instructions are used to implement the communication method described above.

[0251] The embodiments of the present application can also provide a computer program product, which can be executed by a processor. When the computer program product is executed, the communication method performed by the terminal device described above can be implemented.

[0252] The terminal device, the computer readable storage medium, and the computer program product of the embodiments of the present application can execute the communication method performed by the terminal device described above. The specific implementation process and beneficial effects are described above, and will not be described here.

[0253] All or part of the steps of the above method embodiments can be completed by program instruction related hardware. The foregoing program can be stored in a readable memory. When the program is executed, the steps of the above method embodiments are executed. The foregoing memory (storage medium) includes a read-only memory (English: read-only memory, abbreviation: ROM), a RAM, a flash memory, a hard disk, a solid state disk, a magnetic tape, a floppy disk, an optical disc, and any combination thereof.

[0254] The embodiments of the present application are described with reference to the flowcharts and / or block diagrams of the methods, devices (systems), and computer program products according to the embodiments of the present application. It should be understood that each flow and / or block in the flowcharts and / or block diagrams, and a combination of flows and / or blocks in the flowcharts and / or block diagrams can be implemented by computer program instructions. These computer program instructions can be provided to a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing devices to produce a machine, so that the instructions executed by the computer or other programmable data processing devices generate a device that implements the functions specified in the flowcharts and / or block diagrams. Figure 1 one or more flows and / or blocks Figure 1 one or more flows and / or blocks

[0255] These computer program instructions can also be stored in a computer-readable memory that can direct the computer or other programmable data processing devices to work in a specific manner, so that the instructions stored in the computer-readable memory produce a manufactured product including instruction devices that implement the functions specified in the flowcharts and / or block diagrams. Figure 1 one or more flows and / or blocks Figure 1 one or more flows and / or blocks

[0256] These computer program instructions can also be loaded onto a computer or other programmable data processing device, so that a series of operation steps are performed on the computer or other programmable device to produce a computer-implemented process, so that the instructions executed on the computer or other programmable device provide steps for implementing the functions specified in the flowcharts and / or block diagrams. Figure 1 one or more flows and / or blocks Figure 1 one or more flows and / or blocks

[0257] Obviously, those skilled in the art can make various modifications and variations to the embodiments of the present application without departing from the spirit and scope of the present application. Thus, if these modifications and variations of the embodiments of the present application fall within the scope of the claims of the present application and their equivalents, the present application also intends to include these modifications and variations.

[0258] In the present application, the term "includes" and its variants can refer to non-limiting inclusion; the term "or" and its variants can refer to "and / or". In the present application, the terms "first", "second", etc. are used to distinguish similar objects, and do not necessarily describe a specific order or sequence. In the present application, "multiple" refers to two or more. "And / or", which describes the relationship between the associated objects, means that there can be three relationships, for example, A and / or B, which means that there are three cases: A alone, A and B together, and B alone. The character " / " generally represents an "or" relationship between the associated objects.

Claims

1. A communication method, characterized in that, include: The terminal device receives N Physical Downlink Control Channel (PDCCH) commands on N beams. The PDCCH commands are used to trigger the terminal device to perform random access, where N is an integer greater than 1. The terminal device receives M random access radio network temporary identifiers (RA-RNTI) scrambled PDCCHs on M beams corresponding to the N beams, where M is an integer greater than or equal to 1; The beam of the Physical Downlink Shared Channel (PDSCH) scheduled by the RA-RNTI scrambled PDCCH is determined by any of the following criteria: Criterion 1: The beam direction of the PDSCH scheduled by the RA-RNTI scrambled PDCCH is the same as that of the beam corresponding to the first PDCCH command; wherein, among the N PDCCH commands, the identifier of the search space corresponding to the first PDCCH command is the largest, or the identifier of the search space corresponding to the first PDCCH command is the smallest. Criterion 2: The beam of the PDSCH scheduled by the RA-RNTI scrambled PDCCH is the same as the beam direction corresponding to the second PDCCH command; wherein, among the N PDCCH commands, the second PDCCH command has the earliest start time domain resource, or the second PDCCH command has the latest end time domain resource, or the second PDCCH command has the latest start time domain resource, or the second PDCCH command has the earliest end time domain resource; Guideline 3: When the PDCCH command adopts the repetitive transmission mode, the beam of the PDSCH scheduled by the RA-RNTI scrambled PDCCH is the beam corresponding to the first control resource set in the first time slot; wherein, the first time slot is the time slot with the control resource set configured closest to the time slot where the M RA-RNTI scrambled PDCCHs are located, and the first control resource set is the control resource set with the smallest identifier in the first time slot.

2. The method according to claim 1, characterized in that, M is 1, or M is equal to N.

3. The method according to claim 2, characterized in that, M is 1, and the beam directions of the M beams are the same as the beam direction of the beam corresponding to the first PDCCH command. Among the N PDCCH commands, the search space identifier corresponding to the first PDCCH command is either the largest or the smallest.

4. The method according to claim 3, characterized in that, The beam corresponding to the first PDCCH command is the beam corresponding to the control resource set where the first PDCCH candidate is located, and the first PDCCH candidate is the PDCCH retransmission candidate corresponding to the first PDCCH command.

5. The method according to claim 2, characterized in that, M is 1, and the beam directions of the M beams are the same as the beam directions corresponding to the second PDCCH command; Among the N PDCCH commands, the second PDCCH command has the earliest start time domain resource, or the second PDCCH command has the latest end time domain resource, or the second PDCCH command has the latest start time domain resource, or the second PDCCH command has the earliest end time domain resource.

6. The method according to claim 2, characterized in that, M is 1, and the M beams are the beams corresponding to the first control resource set in the first time slot; Wherein, the first time slot is the time slot with the control resource set configured closest to the time slot where the M RA-RNTI scrambled PDCCHs are located, and the first control resource set is the control resource set with the smallest identifier in the first time slot.

7. The method according to any one of claims 1-6, characterized in that, M is the same as N; the beam direction of the i-th beam in the M beams is the same as the beam direction of the i-th beam in the N beams; The time-domain resources of the M beams are arranged in order of their start times from earliest to latest; the time-domain resources of the N beams are arranged in order of their start times from earliest to latest.

8. The method according to any one of claims 1-6, characterized in that, M is the same as N; the beam direction of the i-th beam in the M beams is the same as the beam direction of the i-th beam in the N beams; The time-domain resources of the M beams are arranged in order from early to late time; the N beams are arranged in order from smallest to largest according to the identifier of the corresponding search space, or the N beams are arranged in order from largest to smallest according to the identifier of the corresponding search space.

9. The method according to any one of claims 1-6, characterized in that, The M is the same as the N; For any one of the M beams, the M beams are the beams corresponding to the second control resource set in the second time slot; Wherein, the second time slot is the time slot with the control resource set configured closest to the time slot of the PDCCH with the earliest starting time domain resource position among the M RA-RNTI scrambled PDCCHs, and the second control resource set is the control resource set with the smallest identifier in the second time slot.

10. The method according to any one of claims 1-6, characterized in that, The value of N is 2.

11. A communication method, characterized in that, include: The network device sends N PDCCH commands on N beams. The PDCCH commands are used to trigger the terminal device to perform random access. N is an integer greater than 1. The network device transmits M RA-RNTI scrambled PDCCHs on M beams corresponding to the N beams, where M is an integer greater than or equal to 1; The beam of the Physical Downlink Shared Channel (PDSCH) scheduled by the RA-RNTI scrambled PDCCH is determined by any of the following criteria: Criterion 1: The beam direction of the PDSCH scheduled by the RA-RNTI scrambled PDCCH is the same as that of the beam corresponding to the first PDCCH command; wherein, among the N PDCCH commands, the identifier of the search space corresponding to the first PDCCH command is the largest, or the identifier of the search space corresponding to the first PDCCH command is the smallest. Criterion 2: The beam of the PDSCH scheduled by the RA-RNTI scrambled PDCCH is the same as the beam direction corresponding to the second PDCCH command; wherein, among the N PDCCH commands, the second PDCCH command has the earliest start time domain resource, or the second PDCCH command has the latest end time domain resource, or the second PDCCH command has the latest start time domain resource, or the second PDCCH command has the earliest end time domain resource; Guideline 3: When the PDCCH command adopts the repetitive transmission mode, the beam of the PDSCH scheduled by the RA-RNTI scrambled PDCCH is the beam corresponding to the first control resource set in the first time slot; wherein, the first time slot is the time slot with the control resource set configured closest to the time slot where the M RA-RNTI scrambled PDCCHs are located, and the first control resource set is the control resource set with the smallest identifier in the first time slot.

12. The method according to claim 11, characterized in that, M is 1, or M is equal to N.

13. The method according to claim 12, characterized in that, M is 1, and the beam directions of the M beams are the same as the beam direction of the beam corresponding to the first PDCCH command. Among the N PDCCH commands, the search space identifier corresponding to the first PDCCH command is either the largest or the smallest.

14. The method according to claim 13, characterized in that, The beam corresponding to the first PDCCH command is the beam corresponding to the control resource set where the first PDCCH candidate is located, and the first PDCCH candidate is the PDCCH retransmission candidate corresponding to the first PDCCH command.

15. The method according to claim 12, characterized in that, M is 1, and the beam directions of the M beams are the same as the beam directions corresponding to the second PDCCH command; Among the N PDCCH commands, the second PDCCH command has the earliest start time domain resource, or the second PDCCH command has the latest end time domain resource, or the second PDCCH command has the latest start time domain resource, or the second PDCCH command has the earliest end time domain resource.

16. The method according to claim 12, characterized in that, M is 1, and the M beams are the beams corresponding to the first control resource set in the first time slot; Wherein, the first time slot is the time slot with the control resource set configured closest to the time slot where the M RA-RNTI scrambled PDCCHs are located, and the first control resource set is the control resource set with the smallest identifier in the first time slot.

17. The method according to any one of claims 11-16, characterized in that, M is the same as N; the beam direction of the i-th beam in the M beams is the same as the beam direction of the i-th beam in the N beams; The time-domain resources of the M beams are arranged in order of their start times from earliest to latest; the time-domain resources of the N beams are arranged in order of their start times from earliest to latest.

18. The method according to any one of claims 11-16, characterized in that, M is the same as N; the beam direction of the i-th beam in the M beams is the same as the beam direction of the i-th beam in the N beams; The time-domain resources of the M beams are arranged in order from early to late time; the N beams are arranged in order from smallest to largest according to the identifier of the corresponding search space, or the N beams are arranged in order from largest to smallest according to the identifier of the corresponding search space.

19. The method according to any one of claims 11-16, characterized in that, The M is the same as the N; For any one of the M beams, the M beams are the beams corresponding to the second control resource set in the second time slot; Wherein, the second time slot is the time slot with the control resource set configured closest to the time slot of the PDCCH with the earliest starting time domain resource position among the M RA-RNTI scrambled PDCCHs, and the second control resource set is the control resource set with the smallest identifier in the second time slot.

20. The method according to any one of claims 11-16, characterized in that, The value of N is 2.

21. A communication device, characterized in that, It includes a first receiving module and a second receiving module, wherein, The first receiving module is used for the terminal device to receive N Physical Downlink Control Channel (PDCCH) commands on N beams, wherein the PDCCH commands are used to trigger the terminal device to perform random access, and N is an integer greater than 1; The second receiving module is used for the terminal device to receive M RA-RNTI scrambled PDCCHs on M beams corresponding to the N beams, where M is an integer greater than or equal to 1; The beam of the Physical Downlink Shared Channel (PDSCH) scheduled by the RA-RNTI scrambled PDCCH can be determined by any of the following criteria: Criterion 1: The beam direction of the PDSCH scheduled by the RA-RNTI scrambled PDCCH is the same as that of the beam corresponding to the first PDCCH command; wherein, among the N PDCCH commands, the identifier of the search space corresponding to the first PDCCH command is the largest, or the identifier of the search space corresponding to the first PDCCH command is the smallest. Criterion 2: The beam of the PDSCH scheduled by the RA-RNTI scrambled PDCCH is the same as the beam direction corresponding to the second PDCCH command; wherein, among the N PDCCH commands, the second PDCCH command has the earliest start time domain resource, or the second PDCCH command has the latest end time domain resource, or the second PDCCH command has the latest start time domain resource, or the second PDCCH command has the earliest end time domain resource; Guideline 3: When the PDCCH command adopts the repetitive transmission mode, the beam of the PDSCH scheduled by the RA-RNTI scrambled PDCCH is the beam corresponding to the first control resource set in the first time slot; wherein, the first time slot is the time slot with the control resource set configured closest to the time slot where the M RA-RNTI scrambled PDCCHs are located, and the first control resource set is the control resource set with the smallest identifier in the first time slot.

22. A communication device, characterized in that, It includes a first transmitting module and a second transmitting module, wherein, The first sending module is used for the network device to send N Physical Downlink Control Channel (PDCCH) commands on N beams, wherein the PDCCH commands are used to trigger the terminal device to perform random access, and N is an integer greater than 1; The second transmitting module is used for the network device to transmit M RA-RNTI scrambled PDCCHs on M beams corresponding to the N beams, where M is an integer greater than or equal to 1; The beam of the Physical Downlink Shared Channel (PDSCH) scheduled by the RA-RNTI scrambled PDCCH can be determined by any of the following criteria: Criterion 1: The beam direction of the PDSCH scheduled by the RA-RNTI scrambled PDCCH is the same as that of the beam corresponding to the first PDCCH command; wherein, among the N PDCCH commands, the identifier of the search space corresponding to the first PDCCH command is the largest, or the identifier of the search space corresponding to the first PDCCH command is the smallest. Criterion 2: The beam of the PDSCH scheduled by the RA-RNTI scrambled PDCCH is the same as the beam direction corresponding to the second PDCCH command; wherein, among the N PDCCH commands, the second PDCCH command has the earliest start time domain resource, or the second PDCCH command has the latest end time domain resource, or the second PDCCH command has the latest start time domain resource, or the second PDCCH command has the earliest end time domain resource; Guideline 3: When the PDCCH command adopts the repetitive transmission mode, the beam of the PDSCH scheduled by the RA-RNTI scrambled PDCCH is the beam corresponding to the first control resource set in the first time slot; wherein, the first time slot is the time slot with the control resource set configured closest to the time slot where the M RA-RNTI scrambled PDCCHs are located, and the first control resource set is the control resource set with the smallest identifier in the first time slot.

23. A communication device, characterized in that, include: Transceiver, processor, memory; The memory stores computer-executed instructions; The processor executes computer execution instructions stored in the memory, causing the processor to perform the communication method as described in any one of claims 1 to 10 or the communication method as described in any one of claims 11 to 20.

24. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores computer-executable instructions, which, when executed by a processor, are used to implement the communication method according to any one of claims 1 to 10 or the communication method according to any one of claims 11 to 20.

25. A computer program product, characterized in that, It includes a computer program, which, when executed by a processor, can implement the communication method according to any one of claims 1 to 10 or the communication method according to any one of claims 11 to 20.

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