Communication method, device, and storage medium

Abstract

The present disclosure relates to a communication method, a device, and a storage medium. The method comprises: receiving first information sent by a network device, the first information being used for indicating the number of retransmissions of a first channel, and the first channel comprising a common physical downlink shared channel (PDSCH). In this way, a terminal device can determine the number of retransmissions of a common PDSCH by means of the received first information, so that information transmitted on the common PDSCH is detected multiple times, thereby ensuring the reliability of common PDSCH transmission.

Description

Communication method, device and storage medium Technical Field

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

[0002] In non-terrestrial networks (NTN), satellite communications are used to provide communication services to terrestrial users. Since satellites are far away from the ground, downlink coverage performance is relatively poor, and a downlink coverage enhancement solution is needed to ensure communication quality.

[0003] Summary of the Invention

[0004] The embodiments of the present disclosure provide a communication method, a device, and a storage medium.

[0005] According to a first aspect of an embodiment of the present disclosure, a communication method is proposed, which is executed by a terminal device. The method includes:

[0006] First information sent by a network device is received, where the first information is used to indicate a number of retransmissions of a first channel, where the first channel includes a common physical downlink shared channel (PDSCH).

[0007] According to a second aspect of an embodiment of the present disclosure, a communication method is provided, which is performed by a network device. The method includes:

[0008] First information is sent to a terminal device, where the first information is used to indicate the number of retransmissions of a first channel, where the first channel includes a common physical downlink shared channel (PDSCH).

[0009] According to a third aspect of an embodiment of the present disclosure, a terminal device is provided, including:

[0010] The transceiver module is configured to receive first information sent by a network device, where the first information is used to indicate the number of retransmissions of a first channel, where the first channel includes a common physical downlink shared channel (PDSCH).

[0011] According to a fourth aspect of an embodiment of the present disclosure, a network device is provided, including:

[0012] The transceiver module is configured to send first information to the terminal device, where the first information is used to indicate the number of retransmissions of the first channel, and the first channel includes a common physical downlink shared channel PDSCH.

[0013] According to a fifth aspect of an embodiment of the present disclosure, a communication device is proposed, comprising: one or more processors; wherein the communication device is used to execute an optional implementation of the first aspect or the second aspect.

[0014] According to the sixth aspect of an embodiment of the present disclosure, a communication system is proposed, which may include: a terminal device and a network device; wherein the terminal device is configured to execute the method described in the optional implementation manner of the first aspect, and the network device is configured to execute the method described in the optional implementation manner of the second aspect.

[0015] According to a seventh aspect of an embodiment of the present disclosure, a storage medium is proposed, which stores instructions. When the instructions are executed on a communication device, the communication device executes the method described in the optional implementation of the first aspect or the second aspect.

[0016] The technical solution provided by the embodiments of the present disclosure may have the following beneficial effects: receiving first information sent by a network device, the first information being used to indicate a number of retransmissions of a first channel, the first channel including a physical downlink shared channel (PDSCH). Thus, the terminal device can determine the number of retransmissions of the PDSCH based on the received first information, thereby detecting information transmitted by the PDSCH multiple times and ensuring the reliability of the PDSCH transmission.

[0017] It is to be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the disclosure. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present disclosure, the following drawings required for describing the embodiments are introduced. The following drawings are merely some embodiments of the present disclosure and do not impose specific limitations on the protection scope of the present disclosure.

[0019] FIG1 is a schematic diagram showing the architecture of a communication system according to an embodiment of the present disclosure.

[0020] FIG2 is an interactive schematic diagram illustrating a communication method according to an embodiment of the present disclosure.

[0021] FIG3A is a flow chart showing a communication method according to an embodiment of the present disclosure.

[0022] FIG3B is a flow chart showing a communication method according to an embodiment of the present disclosure.

[0023] FIG4A is a flow chart showing a communication method according to an embodiment of the present disclosure.

[0024] FIG4B is a flow chart showing a communication method according to an embodiment of the present disclosure.

[0025] FIG5 is an interactive diagram illustrating a communication method according to an embodiment of the present disclosure.

[0026] FIG6A is a schematic structural diagram of a terminal device proposed in an embodiment of the present disclosure.

[0027] FIG6B is a schematic structural diagram of a network device proposed in an embodiment of the present disclosure.

[0028] FIG7A is a schematic structural diagram of a communication device proposed in an embodiment of the present disclosure.

[0029] FIG7B is a schematic diagram of the structure of the chip proposed in an embodiment of the present disclosure. DETAILED DESCRIPTION

[0030] The embodiments of the present disclosure provide a communication method, a device, and a storage medium.

[0031] In a first aspect, an embodiment of the present disclosure provides a communication method, which is executed by a terminal device. The method includes:

[0032] First information sent by a network device is received, where the first information is used to indicate a number of retransmissions of a first channel, where the first channel includes a common physical downlink shared channel (PDSCH).

[0033] In the above embodiment, the terminal device can determine the number of retransmissions of the common PDSCH through the received first information, thereby detecting the information transmitted by the common PDSCH multiple times to ensure the reliability of the common PDSCH transmission.

[0034] In conjunction with some embodiments of the first aspect, in some embodiments, receiving the first information sent by the network device includes:

[0035] Receive the first information sent by the network device through a first signaling, where the first signaling includes at least one of the following: a second signaling and a third signaling, where the second signaling is a radio resource control RRC, and the third signaling is a signaling for scheduling the first channel.

[0036] In the above embodiment, the first information is transmitted through existing signaling, saving signaling resources.

[0037] In combination with some embodiments of the first aspect, in some embodiments, the second signaling is used to configure multiple first numbers, and the third signaling is used to determine the number of retransmissions from the multiple first numbers.

[0038] In the above embodiment, the network device can configure multiple first numbers through the second signaling, and indicate which of the multiple first numbers is used as the number of retransmissions through the third signaling, thereby improving the flexibility of indicating the number of retransmissions.

[0039] In combination with some embodiments of the first aspect, in some embodiments, the second signaling is sent by the network device via broadcast.

[0040] In combination with some embodiments of the first aspect, in some embodiments, the first field in the third signaling is used to send the first information.

[0041] In the above embodiment, the first information may be sent through an existing field in the third signaling, thereby saving signaling resources.

[0042] In combination with some embodiments of the first aspect, in some embodiments, the first field is a time domain resource allocation TDRA field.

[0043] In the above embodiment, the first information may be sent through the TDRA field, thereby saving signaling resources.

[0044] In conjunction with some embodiments of the first aspect, in some embodiments, the method further includes:

[0045] Determining that the time domain resource information of the first channel is first time domain resource information, where the first time domain resource information is included in first indication information or a predefined table, the first time domain resource information includes time domain resource allocation information and retransmission number information, and the first indication information is used to configure the first channel;

[0046] The number of retransmissions is determined according to the first time domain resource information and the TDRA field.

[0047] In the above embodiment, the terminal device can determine the number of retransmissions through the time domain resource information of the first channel and the TDRA field, so that the number of retransmissions can be obtained without adding additional signaling.

[0048] In combination with some embodiments of the first aspect, in some embodiments, the first field is a modulation and coding strategy MCS field.

[0049] In the above embodiment, the first information may be sent through the MCS field, thereby saving signaling resources.

[0050] In combination with some embodiments of the first aspect, in some embodiments, the high X bits of the MCS field are used to indicate the number of retransmissions.

[0051] In the above embodiment, the high X bits of the MSC domain may be used to indicate the number of retransmissions, thereby saving signaling resources.

[0052] In combination with some embodiments of the first aspect, in some embodiments, the value of X is 1 or 2.

[0053] In the above embodiment, the number of retransmissions may be indicated by the upper one or two bits of the MCS field, thereby improving the flexibility of indicating the number of retransmissions.

[0054] In combination with some embodiments of the first aspect, in some embodiments, the first field is a downlink allocation index DAI field.

[0055] In the above embodiment, the first information can be sent through the DAI domain, thereby saving signaling resources.

[0056] In conjunction with some embodiments of the first aspect, in some embodiments, the first channel includes at least one of the following: a second channel and a third channel, the third channel includes a channel carrying contention resolution information hybrid automatic repeat request confirmation msg4 HARQ-ACK, and the second channel includes at least one of the following:

[0057] Public PDSCH carrying contention resolution information msg4;

[0058] Common PDSCH carrying system information block SIB1;

[0059] Common PDSCH carrying contention random access response information msg2;

[0060] Common PDSCH carrying non-contention random access response information msgB;

[0061] Public PDSCH scheduled by temporary cell radio network temporary identifier TC-RNTI;

[0062] The common PDSCH is scheduled by the cell radio network temporary identifier C-RNTI.

[0063] In the above embodiment, the first channel may include at least one, and the network device may indicate the number of retransmissions of each first channel respectively.

[0064] In combination with some embodiments of the first aspect, in some embodiments, the second signaling is used to configure the candidate retransmission times, and different first channels correspond to different candidate retransmission times.

[0065] In the above embodiment, the candidate retransmission times of different first channels may be indicated by the second signaling.

[0066] In conjunction with some embodiments of the first aspect, in some embodiments, the method further includes:

[0067] The candidate retransmission number is used as the retransmission number of the first channel.

[0068] In the above embodiment, when there is only one candidate number of retransmissions, the candidate number of retransmissions may be used as the number of retransmissions of the first channel.

[0069] In combination with some embodiments of the first aspect, in some embodiments, the candidate retransmission number includes multiple, the third signaling is used to indicate the DAI value corresponding to the DAI domain, and the method further includes:

[0070] According to the DAI value, the number of retransmissions of the first channel is determined from a plurality of candidate retransmission numbers.

[0071] In the above embodiment, when the candidate number of retransmissions includes multiple numbers, the number of retransmissions of the first channel may be indicated from the multiple candidate number of retransmissions by using the DAI value.

[0072] In conjunction with some embodiments of the first aspect, in some embodiments, the candidate number of retransmissions includes a second number and a third number, and the method further includes:

[0073] Determining, according to the DAI value, a first candidate retransmission number from the multiple candidate retransmission numbers;

[0074] The second number among the first candidate retransmission times is used as the retransmission times of the second channel, and the third number among the first candidate retransmission times is used as the retransmission times of the third channel.

[0075] In the above embodiment, the candidate retransmission times may be a group, corresponding to the retransmission times of each first channel supported by the terminal device.

[0076] In conjunction with some embodiments of the first aspect, in some embodiments, the method further includes:

[0077] Report second information to the network device, the second information including at least one of the following: first capability information and a first request message, the first capability information being used to indicate that the terminal device supports repeated transmission of the first channel, and the first request message being used to request the network device to repeatedly transmit the first channel.

[0078] In the above embodiment, after the terminal device reports the second information to the network device, the network device sends the first information to the terminal device, thereby improving the validity of the first information.

[0079] In combination with some embodiments of the first aspect, in some embodiments, the first information is used to indicate that the first channel is retransmitted in N time slots, and the value of N is the number of retransmissions.

[0080] In the above embodiment, the terminal device may receive the repeatedly transmitted first channel multiple times according to the number of retransmissions N, thereby improving the reliability of the common PDSCH transmission.

[0081] In conjunction with some embodiments of the first aspect, in some embodiments, the first channel is a channel carrying DCI scheduled msg4 scrambled by the C-RNTI, and the method further includes at least one of the following:

[0082] The fourth number is used as the retransmission number, where the fourth number is the most recent retransmission number of the user equipment-specific physical downlink shared channel UE-specific PDSCH;

[0083] Using a predefined fifth number as the number of retransmissions;

[0084] The number of retransmissions is determined from multiple first numbers configured in the second signaling according to a first rule, where the first rule is a protocol agreement.

[0085] In the above embodiment, when the first channel is a channel carrying msg4 scheduled by the DCI scrambled by the C-RNTI, the number of retransmissions can be determined in a variety of ways, making the method for determining the number of retransmissions more flexible.

[0086] In a second aspect, an embodiment of the present disclosure provides a communication method, which is performed by a network device. The method includes:

[0087] First information is sent to a terminal device, where the first information is used to indicate the number of retransmissions of a first channel, where the first channel includes a common physical downlink shared channel (PDSCH).

[0088] In conjunction with some embodiments of the second aspect, in some embodiments, sending the first information to the terminal device includes:

[0089] The first information is sent to the terminal device via a first signaling, where the first signaling includes at least one of the following: a second signaling and a third signaling, where the second signaling is a radio resource control RRC, and the third signaling is a signaling for scheduling the first channel.

[0090] In combination with some embodiments of the second aspect, in some embodiments, the second signaling is used to configure multiple first numbers, and the third signaling is used to determine the number of retransmissions from the multiple first numbers.

[0091] In combination with some embodiments of the second aspect, in some embodiments, the second signaling is sent via broadcast.

[0092] In combination with some embodiments of the second aspect, in some embodiments, the first field in the third signaling is used to send the first information.

[0093] In combination with some embodiments of the second aspect, in some embodiments, the first field is a time domain resource allocation TDRA field.

[0094] In combination with some embodiments of the second aspect, in some embodiments, the first field is a modulation and coding strategy MCS field.

[0095] In combination with some embodiments of the second aspect, in some embodiments, the high X bits of the MCS field are used to indicate the number of retransmissions.

[0096] In combination with some embodiments of the second aspect, in some embodiments, the value of X is 1 or 2.

[0097] In combination with some embodiments of the second aspect, in some embodiments, the first field is a downlink allocation index DAI field.

[0098] In conjunction with some embodiments of the second aspect, in some embodiments, the first channel includes at least one of the following: a second channel and a third channel, the third channel includes a channel carrying contention resolution information hybrid automatic repeat request confirmation msg4HARQ-ACK, and the second channel includes at least one of the following:

[0099] Public PDSCH carrying contention resolution information msg4;

[0100] Common PDSCH carrying system information block SIB1;

[0101] Common PDSCH carrying contention random access response information msg2;

[0102] Common PDSCH carrying non-contention random access response information msgB;

[0103] Public PDSCH scheduled by temporary cell radio network temporary identifier TC-RNTI;

[0104] The common PDSCH is scheduled by the cell radio network temporary identifier C-RNTI.

[0105] In combination with some embodiments of the second aspect, in some embodiments, the second signaling is used to configure the number of candidate retransmissions, and different first channels correspond to different number of candidate retransmissions.

[0106] In combination with some embodiments of the second aspect, in some embodiments, the candidate retransmission times include multiple, the third signaling is used to indicate the DAI value corresponding to the DAI domain, and the DAI value is used by the terminal device to determine the retransmission times from multiple candidate retransmission times.

[0107] In conjunction with some embodiments of the second aspect, in some embodiments, the method further includes:

[0108] Receive second information reported by the terminal device, the second information including at least one of the following: first capability information and a first request message, the first capability information is used to indicate that the terminal device supports repeated transmission of the first channel, and the first request message is used to request the network device to repeatedly transmit the first channel.

[0109] In combination with some embodiments of the second aspect, in some embodiments, the first information is used to indicate that the first channel is retransmitted in N time slots, and the value of N is the number of retransmissions.

[0110] In a third aspect, an embodiment of the present disclosure provides a communication method, the method comprising:

[0111] The network device sends first information to the terminal device, where the first information is used to indicate the number of retransmissions of a first channel, where the first channel includes a common physical downlink shared channel PDSCH.

[0112] In a fourth aspect, an embodiment of the present disclosure proposes a terminal device, which may include at least one of a transceiver module and a processing module; wherein the terminal device can be used to execute the optional implementation method of the first aspect.

[0113] In a fifth aspect, an embodiment of the present disclosure proposes a network device, which may include at least one of a transceiver module and a processing module; wherein the network device can be used to execute the optional implementation method of the second aspect.

[0114] In a sixth aspect, an embodiment of the present disclosure proposes a terminal device, which may include: one or more processors; wherein the terminal device can be used to execute the optional implementation method of the first aspect.

[0115] In a seventh aspect, an embodiment of the present disclosure proposes a network device, which may include: one or more processors; wherein, the network device can be used to execute the optional implementation method of the second aspect.

[0116] In an eighth aspect, an embodiment of the present disclosure proposes a communication device, which may include: one or more processors; wherein the communication device can be used to execute an optional implementation of the first aspect or the second aspect.

[0117] In the ninth aspect, an embodiment of the present disclosure proposes a communication system, which may include: a terminal device and a network device; wherein, the terminal device is configured to execute the method described in the optional implementation manner of the first aspect, and the network device is configured to execute the method described in the optional implementation manner of the second aspect.

[0118] In a tenth aspect, an embodiment of the present disclosure proposes a storage medium storing instructions, which, when executed on a communication device, enables the communication device to execute the method described in the optional implementation of the first aspect or the second aspect.

[0119] In an eleventh aspect, an embodiment of the present disclosure proposes a program product, which, when executed by a communication device, enables the communication device to execute the method described in the optional implementation manner of the first aspect or the second aspect.

[0120] In a twelfth aspect, an embodiment of the present disclosure proposes a computer program, which, when executed on a computer, enables the computer to execute the method described in the optional implementation of the first or second aspect.

[0121] In a thirteenth aspect, an embodiment of the present disclosure provides a chip or a chip system, wherein the chip or chip system includes a processing circuit configured to execute the method described in the optional implementation of the first aspect or the second aspect.

[0122] It is understandable that the above-mentioned terminal devices, network devices, communication devices, communication systems, storage media, program products, computer programs, chips, or chip systems can all be used to perform the methods proposed in the embodiments of the present disclosure. Therefore, the beneficial effects that can be achieved can refer to the beneficial effects of the corresponding methods and will not be repeated here.

[0123] The present disclosure provides a communication method, device, and storage medium. In some embodiments, the terms "communication method" and "information transmission method" are interchangeable; "communication device" and "information processing device" are interchangeable; and "information processing system" and "communication system" are interchangeable.

[0124] The embodiments of the present disclosure are not exhaustive and are merely illustrative of some embodiments, and are not intended to be a specific limitation on the scope of protection of the present disclosure. In the absence of contradiction, each step in a certain embodiment can be implemented as an independent embodiment, and the steps can be arbitrarily combined. For example, a solution after removing some steps in a certain embodiment can also be implemented as an independent embodiment, and the order of the steps in a certain embodiment can be arbitrarily exchanged. In addition, the optional implementation methods in a certain embodiment can be arbitrarily combined; in addition, the embodiments can be arbitrarily combined. For example, some or all steps of different embodiments can be arbitrarily combined, and a certain embodiment can be arbitrarily combined with the optional implementation methods of other embodiments.

[0125] In each embodiment of the present disclosure, unless otherwise specified or provided for by logic, the terms and / or descriptions between the embodiments are consistent and can be referenced by each other. The technical features in different embodiments can be combined to form a new embodiment based on their inherent logical relationships.

[0126] The terms used in the embodiments of the present disclosure are only for the purpose of describing specific embodiments and are not intended to limit the present disclosure.

[0127] In the embodiments of the present disclosure, unless otherwise specified, elements expressed in the singular, such as "a", "an", "the", "above", "said", "the", "the", etc., may mean "one and only one", or "one or more", "at least one", etc. For example, when using articles such as "a", "an", "the" in English in translation, the noun following the article may be understood as a singular expression or a plural expression.

[0128] In some embodiments, "plurality" may refer to two or more.

[0129] In some embodiments, the terms "at least one," "one or more," "a plurality of," "multiple," etc. may be used interchangeably.

[0130] In some embodiments, descriptions such as "at least one of A and B," "A and / or B," "A in one case, B in another case," or "in response to one case A, in response to another case B" may include the following technical solutions depending on the situation: in some embodiments, A (A is executed independently of B); in some embodiments, B (B is executed independently of A); in some embodiments, execution is selected from A and B (A and B are selectively executed); and in some embodiments, A and B (both A and B are executed). The above is also applicable when there are more branches such as A, B, and C.

[0131] In some embodiments, "A or B" and other descriptions may include the following technical solutions depending on the situation: in some embodiments, A (A is executed independently of B); in some embodiments, B (B is executed independently of A); in some embodiments, execution is selected from A and B (A and B are selectively executed). The above is also applicable when there are more branches such as A, B, C, etc.

[0132] The prefixes such as "first" and "second" in the embodiments of the present disclosure are only used to distinguish different description objects and do not constitute any restriction on the position, order, priority, quantity or content of the description objects. For the statement of the description object, please refer to the description in the context of the claims or embodiments, and no unnecessary restriction should be constituted due to the use of prefixes. For example, if the description object is a "field", the ordinal number before the "field" in the "first field" and the "second field" does not limit the position or order between the "fields". "First" and "second" do not limit whether the "fields" they modify are in the same message, nor do they limit the order of the "first field" and the "second field". For another example, if the description object is a "level", the ordinal number before the "level" in the "first level" and the "second level" does not limit the priority between the "levels". For another example, the number of description objects is not limited by the ordinal number and can be one or more. Taking "first device" as an example, the number of "devices" can be one or more. In addition, the objects modified by different prefixes can be the same or different. For example, if the description object is "device", then the "first device" and the "second device" can be the same device or different devices, and their types can be the same or different; for another example, if the description object is "information", then the "first information" and the "second information" can be the same information or different information, and their contents can be the same or different.

[0133] In some embodiments, “including A,” “comprising A,” “used to indicate A,” and “carrying A” can be interpreted as directly carrying A or indirectly indicating A.

[0134] In some embodiments, terms such as "in response to...", "in response to determining...", "in the case of...", "at the time of...", "when...", "if...", "if...", etc. can be used interchangeably.

[0135] In some embodiments, terms such as "greater than", "greater than or equal to", "not less than", "more than", "more than or equal to", "not less than", "higher than", "higher than or equal to", "not less than", and "above" can be replaced with each other, and terms such as "less than", "less than or equal to", "not greater than", "less than", "less than or equal to", "not more than", "lower than", "lower than or equal to", "not higher than", and "below" can be replaced with each other.

[0136] In some embodiments, devices and the like can be interpreted as physical or virtual, and their names are not limited to those described in the embodiments. Terms such as "device," "equipment," "device," "circuit," "network element," "node," "function," "unit," "section," "system," "network," "chip," "chip system," "entity," and "subject" can be used interchangeably.

[0137] In some embodiments, "network" can be interpreted as devices included in the network (eg, access network equipment, core network equipment, etc.).

[0138] In some embodiments, the terms "Access Network Device (AN Device)", "Radio Access Network Device (RAN Device)", "Base Station (BS)", "Radio Base Station (Radio Base Station)", "Fixed Station (Fixed Station)", "Node (Node)", "Access Point (Access Point)", "Transmission Point (TP)", "Reception Point (RP)", "Transmission and / or Reception Point (TRP))", "Panel (Panel)", "Antenna Panel (Antenna Panel)", "Antenna Array (Antenna Array)" "Cell (Cell)", "Macro Cell (Macro Cell)", "Small Cell (Small Cell)", "Femto Cell (Femto Cell)", "Pico Cell (Pico Cell)" "Sector (Sector)", "Cell Group (Cell Group)", "Serving Cell", "Carrier (Carrier)", "Component Carrier (Component Carrier)", "Bandwidth Part (BWP)" and the like can be used interchangeably.

[0139] In some embodiments, the terms "terminal", "terminal device", "user equipment (UE)", "user terminal" "mobile station (MS)", "mobile terminal (MT)", subscriber station (Subscriber Station), mobile unit (Mobile Unit), subscriber unit (Subscriber Unit), wireless unit (Wireless Unit), remote unit (Remote Unit), mobile device (Mobile Device), wireless device (Wireless Device), wireless communication device (Wireless Communication Device), remote device (Remote Device), mobile subscriber station (Mobile Subscriber Station), access terminal (Access Terminal), mobile terminal (Mobile Terminal), wireless terminal (Wireless Terminal), remote terminal (Remote Terminal), handset (Handset), user agent (User Agent), mobile client (Mobile Client), client (Client) and the like can be used interchangeably.

[0140] In some embodiments, the access network device, the core network device, or the network device can be replaced by a terminal. For example, the various embodiments of the present disclosure can also be applied to a structure in which the communication between the access network device, the core network device, or the network device and the terminal is replaced by communication between multiple terminals (for example, device-to-device (D2D), vehicle-to-everything (V2X), etc.). In this case, it is also possible to set the structure in which the terminal has all or part of the functions of the access network device. In addition, terms such as "uplink" and "downlink" can also be replaced by terms corresponding to communication between terminals (for example, "side"). For example, uplink channels, downlink channels, etc. can be replaced by side channels or direct channels, and uplinks, downlinks, etc. can be replaced by side links or direct links.

[0141] In some embodiments, the terminal may be replaced by an access network device, a core network device, or a network device. In this case, the access network device, the core network device, or the network device may have a structure that has all or part of the functions of the terminal.

[0142] In some embodiments, obtaining data, information, etc. may comply with the laws and regulations of the country where the data is obtained.

[0143] In some embodiments, data, information, etc. may be obtained with the user's consent.

[0144] In addition, each element, each row, or each column in the table of the embodiment of the present disclosure can be implemented as an independent embodiment, and the combination of any elements, any rows, and any columns can also be implemented as an independent embodiment.

[0145] FIG1 is a schematic diagram illustrating an architecture of a communication system according to an embodiment of the present disclosure. As shown in FIG1 , the communication system 100 may include a terminal device 101 and a network device 102 .

[0146] In some embodiments, the terminal device 101 may include at least one of a mobile phone, a wearable device, an Internet of Things device, a car with communication capabilities, a smart car, a tablet computer, a computer with wireless transceiver capabilities, a virtual reality (VR) terminal device, an augmented reality (AR) terminal device, a wireless terminal device in industrial control, a wireless terminal device in self-driving, a wireless terminal device in remote medical surgery, a wireless terminal device in smart grid, a wireless terminal device in transportation safety, a wireless terminal device in smart city, and a wireless terminal device in smart home, but is not limited thereto.

[0147] In some embodiments, the network device 102 may include at least one of an access network device and a core network device.

[0148] In some embodiments, the access network device may be a node or device that accesses the terminal device to the wireless network. The access network device may include an evolved NodeB (eNB), a next generation evolved NodeB (ng-eNB), a next generation NodeB (gNB), a node B (NB), a home node B (HNB), a home evolved nodeB (HeNB), a wireless backhaul device, a radio network controller (RNC), a base station controller (BSC), a base transceiver station (BTS), a base band unit (BBU), a mobile switching center, a base station in a 6G communication system, an open base station (Open RAN), a cloud base station (Cloud RAN), a base station in other communication systems, and at least one of an access node in a Wi-Fi system, but is not limited thereto.

[0149] In some embodiments, the technical solution of the present disclosure can be applied to the Open RAN architecture. In this case, the interfaces between or within the access network devices involved in the embodiments of the present disclosure can be transformed into internal interfaces of the Open RAN, and the processes and information interactions between these internal interfaces can be implemented through software or programs.

[0150] In some embodiments, the access network device can be composed of a centralized unit (CU) and a distributed unit (DU), where the CU can also be called a control unit (Control Unit). The CU-DU structure can be used to split the protocol layer of the access network device, with the functions of some protocol layers centrally controlled by the CU, and the functions of the remaining part or all of the protocol layers distributed in the DU, which is centrally controlled by the CU, but is not limited to this.

[0151] In some embodiments, the core network device may be a single device, or may be multiple devices or a group of devices. The core network may include at least one of an Evolved Packet Core (EPC), a 5G Core Network (5GCN), and a Next Generation Core (NGC).

[0152] It can be understood that the communication system described in the embodiment of the present disclosure is for the purpose of more clearly illustrating the technical solution of the embodiment of the present disclosure, and does not constitute a limitation on the technical solution proposed in the embodiment of the present disclosure. Ordinary technicians in this field can know that with the evolution of the system architecture and the emergence of new business scenarios, the technical solution proposed in the embodiment of the present disclosure is also applicable to similar technical problems.

[0153] The following embodiments of the present disclosure may be applied to the communication system 100 shown in FIG1 , or a portion thereof, but are not limited thereto. The entities shown in FIG1 are examples. The communication system may include all or part of the entities shown in FIG1 , or may include other entities outside of FIG1 . The number and form of the entities are arbitrary, and the entities may be physical or virtual. The connection relationship between the entities is an example. The entities may be connected or disconnected, and the connection may be in any manner, including direct or indirect, wired or wireless.

[0154] The embodiments of the present disclosure can be applied to Long Term Evolution (LTE), LTE-Advanced (LTE-A), LTE-Beyond (LTE-B), SUPER 3G, IMT-Advanced, 4th generation mobile communication system (4G), 5th generation mobile communication system (5G), 5G New Radio (NR), Future Radio Access (FRA), New-Radio Access Technology (RAT), New Radio (NR), New Radio Access (NX), Future generation radio access (FX), Global System for Mobile communications (GSM (registered trademark)), CDMA2000, Ultra Mobile Broadband (UMB), IEEE 802.11 (Wi-Fi (registered trademark)), IEEE 802.16 (WiMAX (registered trademark)), IEEE 802.20, Ultra-WideBand (UWB), Bluetooth (registered trademark), Public Land Mobile Network (PLMN) networks, Device-to-Device (D2D) systems, Machine-to-Machine (M2M) systems, Internet of Things (IoT) systems, Vehicle-to-Everything (V2X), systems utilizing other communication methods, and next-generation systems based on and extending these methods. Furthermore, multiple systems may be combined (for example, a combination of LTE or LTE-A with 5G).

[0155] In some embodiments of the present disclosure, in satellite communications scenarios, due to limited satellite power and the need to simultaneously deploy multiple beams to cover the entire satellite footprint, some downlink channels may not be correctly demodulated and received due to low signal-to-interference plus noise ratio (SINR). For example, the common Physical Downlink Shared Channel (PDSCH) has poor performance due to its lack of a repetition mechanism.

[0156] FIG2 is an interactive diagram of a communication method according to an embodiment of the present disclosure. The method may be executed by the above-mentioned communication system. As shown in FIG2 , the method may include:

[0157] Step S2101: The terminal device reports second information to the network device.

[0158] In some embodiments, the second information includes at least one of the following: first capability information, a first request message.

[0159] In some embodiments, the first capability information may be used to indicate that the terminal device supports repeated transmission of the first channel.

[0160] In some embodiments, the first request message may be used to request the network device to repeatedly send the first channel.

[0161] In some embodiments, the first channel may be a common PDSCH, for example, the first channel is msg4PDSCH, the first capability information may be used to indicate that the terminal device supports repetition of msg4, and the first request message may be msg4repetition request.

[0162] In some embodiments, the terminal device may report the first capability information to the network device.

[0163] In some embodiments, the terminal device may report the first request message to the network device.

[0164] In some embodiments, the terminal device may report the first capability information and the first request message to the network device.

[0165] In some embodiments, the name of the second information is not limited, and may be, for example, "capability information", "request message", "retransmission indication message", etc.

[0166] In some embodiments, the terminal device determines that repeated transmission of the first channel is supported, and reports the second information to the network device.

[0167] Step S2102: The network device sends first information to the terminal device through a first signaling.

[0168] In some embodiments, the first information may be used to indicate the number of retransmissions of the first channel.

[0169] In some embodiments, the "number of retransmissions" may also be referred to as the "number of repeated transmissions" or the "number of repeated sendings".

[0170] In some embodiments, the name of the first information is not limited, and may be, for example, "retransmission number information", "retransmission indication information", "retransmission number indication information", etc.

[0171] In some embodiments, the first signaling may include at least one of the following: second signaling and third signaling, the second signaling may be radio resource control (RRC), and the third signaling may be signaling for scheduling the first channel.

[0172] In some embodiments, the third signaling may be downlink control information (DCI) for scheduling the first channel.

[0173] For example, if the first channel is msg4PDSCH, the third signaling may be DCI scheduling msg4.

[0174] In some embodiments, the network device may send the first information to the terminal device via the second signaling. For example, if the first channel is msg4PDSCH, the network device may configure a unique number of msg4PDSCH retransmissions via RRC signaling.

[0175] In some embodiments, the network device may send the first information to the terminal device via the third signaling. For example, if the first channel is msg4PDSCH, the network device may indicate a unique number of msg4PDSCH retransmissions via the DCI scheduling msg4.

[0176] In some embodiments, the network device may also send the first information through the second signaling and the third signaling.

[0177] In some embodiments, the second signaling may be used to configure multiple first numbers, and the third signaling may be used to determine the number of retransmissions from the multiple first numbers.

[0178] In some embodiments, the first number configured by the network device through the second signaling may be greater than 1. For example, the first number configured by the network device includes 1, 2, 4, and 8. The third signaling may indicate that one of the multiple first numbers is the number of repetitions. For example, the DCI of scheduling msg4 may indicate 2 as the number of repetitions.

[0179] In some embodiments, the second signaling is sent by the network device via broadcasting.

[0180] In some embodiments, the network device may broadcast the second signaling to multiple terminal devices so that the multiple terminal devices can receive the first information through the second signaling. If the first number configured in the second signaling includes one, the terminal device may use the first number as the number of retransmissions on the first channel; if the first number configured in the second signaling includes multiple numbers, the network device may indicate the number of retransmissions by scheduling the third signaling.

[0181] In some embodiments, the first field in the third signaling can be used to send the first information.

[0182] In some embodiments, the "first field" may be an existing field in the third signaling. In this way, the indication of the number of retransmissions can be achieved without adding a new field, thereby saving signaling resources.

[0183] In some embodiments, the first field may be a Time Domain Resource Assignment (TDRA) field.

[0184] In some embodiments, the TDRA table in the existing protocol may be modified in advance, and the number of repetitions may be added to the TDRA table, so that the number of repetitions may be sent to the terminal device when the TDRA indicates it.

[0185] In some embodiments, the terminal device determines that the time domain resource information of the first channel is the first time domain resource information, and determines the number of retransmissions based on the first time domain resource information and the TDRA field.

[0186] In some embodiments, the first time domain resource information may include time domain resource allocation information and retransmission number information.

[0187] In some embodiments, the first time domain resource information may be included in the first indication information.

[0188] In some embodiments, the first indication information may be used to configure the first channel. For example, the first indication information may be PDSCH-ConfigCommon.

[0189] In some embodiments, the first time domain resource information may be included in a predefined table, which may include information on the number of time domain resource information retransmissions.

[0190] In some embodiments, if the first indication information includes the first time domain resource information, the terminal device can determine the retransmission number information based on the first time domain resource information. The retransmission number information may include multiple times, and the terminal device can determine the retransmission number from the multiple times based on the TDRA field.

[0191] In some embodiments, if the first indication information does not include the first time domain resource information, the terminal device can determine the number of retransmissions information based on a predefined table. For example, it can determine a column of data corresponding to the number of retransmissions from the predefined table, and determine the number of retransmissions from this column of data based on the TDRA field.

[0192] In some embodiments, "the first indication information does not include the first time domain resource information" can be understood as "the first indication information does not include the time domain resource information of the first channel", or "the first indication information includes second time domain resource information", wherein the second time domain resource information includes time domain resource allocation information and does not include retransmission number information.

[0193] In some embodiments, the second time domain resource information may be configured by the network device according to the first TDRA table.

[0194] In some embodiments, the first TDRA table may include a first field, and the first field may be used for time domain resource allocation.

[0195] In some embodiments, the first field may also be referred to as a column included in the first TDRA table.

[0196] In some embodiments, the first TDRA table may be a TDRA table in an existing protocol, and the first field may include a time domain offset, a start symbol, and a time domain symbol length. Table 1 is a first TDRA table according to an embodiment of the present disclosure. As shown in Table 1, K0 represents the time domain offset, in slots, S represents the start symbol, in symbols, and L represents the time domain symbol length, in symbols.

[0197] In some embodiments, the second time domain resource information may be a list configured according to the first TDRA table. For example, the first time domain resource information may be pdsch-TimeDomainAllocationList.

[0198] In some embodiments, the first TDRA table does not include retransmission number information, and the second time domain resource information configured according to the first TDRA table also does not include retransmission number information.

[0199] In some embodiments, the predefined table may be a second TDRA table, and the second TDRA table may include the first field and a second field, wherein the second field may be used to determine the number of retransmissions.

[0200] In some embodiments, the first field and the second field may also be referred to as columns included in the second TDRA table.

[0201] In some embodiments, the second field may include retransmission count information.

[0202] Table 2 is a second TDRA table according to an embodiment of the present disclosure. The second TDRA table can be understood as adding the number of retransmissions to the first TDRA table. As shown in Table 2, Rep represents the number of retransmissions.

[0203] It should be noted that Table 2 is an exemplary illustration, and the second field in the second TDRA table may also be an index value used to indicate the number of retransmissions, and different index values ​​may correspond to different numbers of retransmissions. After determining the index value, the terminal device may determine the number of retransmissions corresponding to the index value based on a pre-configured correspondence.

[0204] In some embodiments, if the terminal device does not report the second information to the network device, the TDRA configuration applied by the terminal device is pdsch-TimeDomainAllocationList or the first TDRA table.

[0205] In some embodiments, the first field may be a modulation and coding scheme (MCS) field.

[0206] In some embodiments, the high X bits of the MCS field are used to indicate the number of retransmissions.

[0207] In some embodiments, if the upper X bits of the MCS field are used to indicate the number of retransmissions, the remaining 5-X bits of the MCS field may be used to indicate the MCS.

[0208] In some embodiments, if the terminal device does not report the second information to the network device, the valid bits of the MCS may be 5 bits.

[0209] In some embodiments, the value of X can be 1 or 2.

[0210] In some embodiments, if the value of X is 2, the terminal device can determine the number of retransmissions based on the upper two bits of the MCS field. For example, the number of retransmissions indicated by the upper two bits of the MCS field may include 1, 2, 4, and 8, and the terminal device can determine the corresponding number of retransmissions based on the values ​​of the upper two bits of the MCS field.

[0211] In some embodiments, if the value of X is 1 or 2, the terminal device can determine the number of retransmissions based on the upper one or two digits of the MCS field.

[0212] In some embodiments, the terminal device determines that the first number of times configured by the second signaling is less than or equal to 2, and determines the number of retransmissions based on the upper two bits of the MCS field; determines that the first number of times indicated by the second signaling is greater than 2, and determines the number of retransmissions based on the upper two bits of the MCS field.

[0213] For example, the first number of times configured by the second signaling includes 1 and 2. If the upper bit of the MCS domain is 0, the number of retransmissions can be determined to be 1. If the upper bit of the MCS domain is 1, the number of retransmissions can be determined to be 2.

[0214] For another example, the first number of times configured by the second signaling includes 1, 2, 4, and 8. If the upper two digits of the MCS domain are 00, the number of retransmissions can be determined to be 1. If the upper two digits of the MCS domain are 11, the number of retransmissions can be determined to be 8.

[0215] It should be noted that the value of X may also be other values ​​within the scope agreed upon in the protocol. The above-mentioned use of the high X bits of the MCS field to indicate the number of retransmissions is for example only and is not limited in the embodiments of the present disclosure.

[0216] In some embodiments, the first field may be a downlink assignment index (DAI) field.

[0217] In some embodiments, the first channel may include at least one of the following: a second channel, a third channel.

[0218] In some embodiments, the support conditions of the second channel and the third channel of the terminal device may include any of the following:

[0219] The terminal device supports the second channel but not the third channel;

[0220] The terminal device supports the second channel and the third channel;

[0221] The terminal device does not support the second channel but supports the third channel;

[0222] The terminal device does not support the second channel or the third channel.

[0223] In some embodiments, the terminal device may determine the number of retransmissions of the second channel and / or the third channel according to the DAI field, including any of the following:

[0224] The DAI field indicates the number of retransmissions on the second channel;

[0225] The DAI field indicates the number of retransmissions on the third channel;

[0226] The DAI field indicates the number of retransmissions of the second channel and the third channel.

[0227] In some embodiments, the second signaling may be used to configure candidate retransmission times, with different first channels corresponding to different candidate retransmission times.

[0228] In some embodiments, "different first channels correspond to different candidate retransmission counts" can be understood as configuring separate candidate retransmission counts for different first channels. For example, a network device can configure separate candidate retransmission counts for the second and third channels. The candidate retransmission counts for the second and third channels can be the same or different, and this is not limited in the present embodiment.

[0229] In some embodiments, for a terminal device that simultaneously supports multiple first channels, the network device may configure one candidate retransmission number for each first channel supported by the terminal device, or may configure multiple candidate retransmission numbers for each first channel. For example, the network device may configure one candidate retransmission number for the second channel supported by the terminal device, and four candidate retransmission numbers for the third channel supported by the terminal device.

[0230] In some embodiments, the candidate number of retransmissions may be used as the number of retransmissions of the first channel.

[0231] For example, if the network device configures a candidate retransmission number for each first channel supported by the terminal device, the candidate retransmission number may be used as the retransmission number of the first channel.

[0232] It should be noted that if the network device configures a candidate retransmission number for each first channel, the DAI field can be reserved.

[0233] In some embodiments, the candidate retransmission times may include multiple numbers, and the third signaling may be used to indicate the DAI value corresponding to the DAI domain. The terminal device may determine the retransmission times of the first channel from multiple candidate retransmission times based on the DAI value.

[0234] In some embodiments, if the network device configures multiple candidate retransmission times for a first channel supported by the terminal device, a unique candidate retransmission time may be indicated through the DAI field. For example, if the terminal device supports a second channel, the network device may configure multiple candidate retransmission times for the second channel through a second signaling, and indicate one of the multiple candidate retransmission times as the retransmission time for the second channel through a DAI value; if the terminal device supports a third channel, the network device may configure multiple candidate retransmission times for the third channel through a second signaling, and indicate one of the multiple candidate retransmission times as the retransmission time for the third channel through a DAI value.

[0235] In some embodiments, the terminal device supports both a second channel and a third channel, the number of retransmissions for the second channel and the number of retransmissions for the third channel may be the same, and the network device may configure multiple candidate retransmission numbers for the second channel and the third channel, and indicate one of the multiple candidate retransmission numbers as the number of retransmissions for the second channel and the third channel through a DAI value. For example, if the candidate retransmission numbers configured by the network device for the second channel and the third channel include 1, 2, 4, and 8, and the candidate retransmission number indicated by the DAI value is 2, the terminal device may use 2 as the number of retransmissions for the second channel and the third channel.

[0236] In some embodiments, the candidate retransmission times may include a second number and a third number. The terminal device can determine the first candidate retransmission time from the multiple candidate retransmission times based on the DAI value; use the second number in the first candidate retransmission time as the retransmission time of the second channel, and use the third number in the first candidate retransmission time as the retransmission time of the third channel.

[0237] In some embodiments, the terminal device supports both a second channel and a third channel, the number of retransmissions for the second channel and the number of retransmissions for the third channel may be different, and the network device may configure multiple candidate retransmission numbers for the second channel and the third channel, and indicate one of the multiple candidate retransmission numbers through a DAI value. For example, the candidate retransmission numbers configured by the network device for the second channel and the third channel include {2, 1}, {4, 2}, and the candidate retransmission number indicated by the DAI value is {4, 2}, where 4 is the second number and 2 is the third number. The terminal device may use 4 as the retransmission number for the second channel and 2 as the retransmission number for the third channel.

[0238] In some embodiments, the DAI value may correspond to an index value of a candidate retransmission number. For example, among the multiple candidate retransmission numbers configured by the network device for the second channel and the third channel, the index value of {2,1} is 1, and the index value of {4,2} is 2. If the DAI value is 1, it means that the candidate retransmission number indicated by the DAI domain is {2,1}.

[0239] In some embodiments, the second channel may include at least one of the following:

[0240] Public PDSCH carrying msg4;

[0241] Public PDSCH carrying System Information Block 1 (SIB1);

[0242] Public PDSCH carrying msg2;

[0243] Public PDSCH carrying msgB;

[0244] Public PDSCH scheduled by Temporary Cell Radio Network Temporary Identifier (TC-RNTI);

[0245] A common PDSCH scheduled by a Cell Radio Network Temporary Identifier (C-RNTI).

[0246] In some embodiments, the third channel may include a channel carrying msg4 HARQ-ACK.

[0247] In some embodiments, the first information may be used to instruct the first channel to retransmit in N time slots, where the value of N is the number of retransmissions.

[0248] In some embodiments, the symbol positions occupied on each slot may be the same.

[0249] For example, if the value of N is 4, the terminal device can receive the first channel or the information carried by the first channel in four slots.

[0250] In some embodiments, the first channel is a channel carrying msg4 scheduled by DCI scrambled by the C-RNTI, and the method further includes at least one of the following:

[0251] The fourth number is used as the retransmission number, where the fourth number is the most recent retransmission number of the UE-specific physical downlink shared channel UE-specific PDSCH;

[0252] Using a predefined fifth number as the retransmission number;

[0253] The number of retransmissions is determined from a plurality of first numbers configured in the second signaling according to a first rule, where the first rule is a protocol agreement.

[0254] In some embodiments, if the first channel is a channel carrying msg4 scheduled by DCI scrambled by C-RNTI, the number of retransmissions of the first channel can be determined by the method in the above embodiment.

[0255] In some embodiments, if the first channel is a channel carrying msg4 scheduled by DCI scrambled by C-RNTI, the fourth number of times may be used as the number of retransmissions.

[0256] In some embodiments, if the first channel is a channel carrying msg4 scheduled by the DCI scrambled by the C-RNTI, a predefined fifth number may be used as the retransmission number. For example, the fifth number is 4.

[0257] In some embodiments, if the first channel is a channel carrying msg4 scheduled by DCI scrambled by C-RNTI, the number of retransmissions may be determined from a plurality of first numbers configured in the second signaling according to a first rule.

[0258] In some embodiments, the first rule may be a specified value among multiple first digits configured through the second signaling. For example, the specified value may be a maximum value, a minimum value, etc., which is not limited in this embodiment of the present disclosure.

[0259] By adopting the above method, the terminal device can determine the number of retransmissions of the common PDSCH through the received first information, thereby detecting the information transmitted by the common PDSCH multiple times to ensure the reliability of the common PDSCH transmission.

[0260] The method involved in the embodiment of the present disclosure may include at least one of the above steps S2101 to S2102. For example, step S2101 may be implemented as an independent embodiment, and step S2102 may be implemented as an independent embodiment.

[0261] In some embodiments, the above steps S2101 and S2102 may be executed in an interchanged order or simultaneously.

[0262] In some embodiments, reference may be made to other optional implementations described before or after the description corresponding to FIG. 2 .

[0263] In some embodiments, the names of information, etc. are not limited to the names described in the embodiments, and terms such as "information", "message", "signal", "signaling", "report", "configuration", "indication", "instruction", "command", "channel", "parameter", "domain", "field", "symbol", "symbol", "codeword", "codebook", "codeword", "codepoint", "bit", "data", "program", and "chip" can be used interchangeably.

[0264] In some embodiments, "obtain", "get", "get", "receive", "transmit", "bidirectional transmission", "send and / or receive" can be interchangeable, and can be interpreted as receiving from other entities, obtaining from protocols, obtaining from higher layers, obtaining by self-processing, autonomous implementation, etc.

[0265] In some embodiments, terms such as "send", "transmit", "report", "download", "transmit", "bidirectional transmission", "send and / or receive" can be used interchangeably.

[0266] In some embodiments, terms such as "certain", "preset", "preset", "setting", "indicated", "a certain", "any", and "first" can be interchangeable. "Specific A", "preset A", "preset A", "setting A", "indicated A", "a certain A", "any A", and "first A" can be interpreted as A pre-specified in a protocol, etc., or as A obtained through setting, configuration, or indication, etc., or as specific A, a certain A, any A, or first A, etc., but not limited to this.

[0267] FIG3A is a flow chart of a communication method according to an embodiment of the present disclosure. As shown in FIG3A , the embodiment of the present disclosure relates to a communication method, which can be executed by a terminal device. The method may include:

[0268] Step S3101: Report the second information.

[0269] The optional implementation of step S3101 can refer to the optional implementation of step S2101 in Figure 2 and other related parts in the embodiment involved in Figure 2, which will not be repeated here.

[0270] In some embodiments, the terminal device may report the second information to the network device, but is not limited thereto. The terminal device may also report the second information to other entities.

[0271] Step S3102: Obtain first information.

[0272] The optional implementation of step S3102 can refer to the optional implementation of step S2102 in Figure 2 and other related parts in the embodiment involved in Figure 2, which will not be repeated here.

[0273] In some embodiments, the terminal device may receive the first information sent by the network device, but is not limited thereto. The terminal device may also receive the first information sent by other entities.

[0274] In some embodiments, the terminal device may obtain first information specified by the protocol.

[0275] In some embodiments, the terminal device may obtain the first information from an upper layer(s).

[0276] In some embodiments, the terminal device may perform processing to obtain the first information.

[0277] In some embodiments, the above steps S3101 and S3102 can be executed in an interchanged order or simultaneously.

[0278] In some embodiments, the above steps S3101 and S3102 are optional steps.

[0279] FIG3B is a flow chart of a communication method according to an embodiment of the present disclosure. As shown in FIG3B , the embodiment of the present disclosure relates to a communication method, which can be executed by a terminal device. The method may include:

[0280] Step S3201: Obtain first information.

[0281] The optional implementation of step S3201 can refer to the optional implementation of step S2102 in Figure 2 and other related parts in the embodiment involved in Figure 2, which will not be repeated here.

[0282] In some embodiments, receiving the first information sent by the network device includes:

[0283] Receive the first information sent by the network device through a first signaling, where the first signaling includes at least one of the following: a second signaling and a third signaling, where the second signaling is a radio resource control RRC, and the third signaling is a signaling for scheduling the first channel.

[0284] In some embodiments, the second signaling is used to configure multiple first numbers, and the third signaling is used to determine the number of retransmissions from the multiple first numbers.

[0285] In some embodiments, the second signaling is sent by the network device via broadcasting.

[0286] In some embodiments, the first field in the third signaling is used to send the first information.

[0287] In some embodiments, the first field is a time domain resource allocation TDRA field.

[0288] In some embodiments, the method further comprises:

[0289] Determining that the time domain resource information of the first channel is first time domain resource information, where the first time domain resource information is included in first indication information or a predefined table, the first time domain resource information includes time domain resource allocation information and retransmission number information, and the first indication information is used to configure the first channel;

[0290] The number of retransmissions is determined according to the first time domain resource information and the TDRA field.

[0291] In some embodiments, the first field is a modulation and coding strategy (MCS) field.

[0292] In some embodiments, the high X bits of the MCS field are used to indicate the number of retransmissions.

[0293] In some embodiments, the value of X is 1 or 2.

[0294] In some embodiments, the first field is a downlink allocation index DAI field.

[0295] In some embodiments, the first channel includes at least one of the following: a second channel and a third channel, the third channel includes a channel carrying contention resolution information hybrid automatic repeat request confirmation msg4 HARQ-ACK, and the second channel includes at least one of the following:

[0296] Public PDSCH carrying contention resolution information msg4;

[0297] Common PDSCH carrying system information block SIB1;

[0298] Common PDSCH carrying contention random access response information msg2;

[0299] Common PDSCH carrying non-contention random access response information msgB;

[0300] Public PDSCH scheduled by temporary cell radio network temporary identifier TC-RNTI;

[0301] The common PDSCH is scheduled by the cell radio network temporary identifier C-RNTI.

[0302] In some embodiments, the second signaling is used to configure candidate retransmission times, and different first channels correspond to different candidate retransmission times.

[0303] In some embodiments, the method further comprises:

[0304] The candidate retransmission number is used as the retransmission number of the first channel.

[0305] In some embodiments, the candidate retransmission number includes multiple numbers, the third signaling is used to indicate the DAI value corresponding to the DAI field, and the method further includes:

[0306] According to the DAI value, the number of retransmissions of the first channel is determined from a plurality of candidate retransmission numbers.

[0307] In some embodiments, the candidate number of retransmissions includes a second number and a third number, and the method further includes:

[0308] Determining, according to the DAI value, a first candidate retransmission number from the multiple candidate retransmission numbers;

[0309] The second number among the first candidate retransmission times is used as the retransmission times of the second channel, and the third number among the first candidate retransmission times is used as the retransmission times of the third channel.

[0310] In some embodiments, the method further comprises:

[0311] Report second information to the network device, the second information including at least one of the following: first capability information and a first request message, the first capability information being used to indicate that the terminal device supports repeated transmission of the first channel, and the first request message being used to request the network device to repeatedly transmit the first channel.

[0312] In some embodiments, the first information is used to indicate that the first channel is retransmitted in N time slots, and the value of N is the number of retransmissions.

[0313] In some embodiments, the first channel is a channel carrying msg4 scheduled by DCI scrambled by a C-RNTI, and the method further includes at least one of the following:

[0314] The fourth number is used as the retransmission number, where the fourth number is the most recent retransmission number of the user equipment-specific physical downlink shared channel UE-specific PDSCH;

[0315] Using a predefined fifth number as the number of retransmissions;

[0316] The number of retransmissions is determined from multiple first numbers configured in the second signaling according to a first rule, where the first rule is a protocol agreement.

[0317] FIG4A is a flow chart of a communication method according to an embodiment of the present disclosure. As shown in FIG4A , the embodiment of the present disclosure relates to a communication method, which can be performed by a network device. The method may include:

[0318] Step S4101: Obtain second information.

[0319] The optional implementation of step S4101 can refer to the optional implementation of step S2101 in Figure 2 and other related parts in the embodiment involved in Figure 2, which will not be repeated here.

[0320] In some embodiments, the network device may receive the second information sent by the terminal device, but is not limited thereto. The network device may also receive the second information sent by other entities.

[0321] Step S4102: Send the first information.

[0322] The optional implementation of step S4102 can refer to the optional implementation of step S2102 in Figure 2 and other related parts in the embodiment involved in Figure 2, which will not be repeated here.

[0323] In some embodiments, the network device may send the first information to the terminal device, but is not limited thereto. The network device may also send the first information to other entities.

[0324] In some embodiments, the above steps S4101 and S4102 can be executed in an interchanged order or simultaneously.

[0325] In some embodiments, the above steps S4101 and S4102 are optional steps.

[0326] FIG4B is a flow chart of a communication method according to an embodiment of the present disclosure. As shown in FIG4B , the embodiment of the present disclosure relates to a communication method, which can be performed by a network device. The method may include:

[0327] Step S4201: Send the first message.

[0328] The optional implementation of step S4201 can refer to the optional implementation of step S2102 in Figure 2 and other related parts in the embodiment involved in Figure 2, which will not be repeated here.

[0329] In some embodiments, sending the first information to the terminal device includes:

[0330] The first information is sent to the terminal device via a first signaling, where the first signaling includes at least one of the following: a second signaling and a third signaling, where the second signaling is a radio resource control RRC, and the third signaling is a signaling for scheduling the first channel.

[0331] In some embodiments, the second signaling is used to configure multiple first numbers, and the third signaling is used to determine the number of retransmissions from the multiple first numbers.

[0332] In some embodiments, the second signaling is sent via broadcast.

[0333] In some embodiments, the first field in the third signaling is used to send the first information.

[0334] In some embodiments, the first field is a time domain resource allocation TDRA field.

[0335] In some embodiments, the first field is a modulation and coding strategy (MCS) field.

[0336] In some embodiments, the high X bits of the MCS field are used to indicate the number of retransmissions.

[0337] In some embodiments, the value of X is 1 or 2.

[0338] In some embodiments, the first field is a downlink allocation index DAI field.

[0339] In some embodiments, the first channel includes at least one of the following: a second channel and a third channel, the third channel includes a channel carrying contention resolution information hybrid automatic repeat request confirmation msg4 HARQ-ACK, and the second channel includes at least one of the following:

[0340] Public PDSCH carrying contention resolution information msg4;

[0341] Common PDSCH carrying system information block SIB1;

[0342] Common PDSCH carrying contention random access response information msg2;

[0343] Common PDSCH carrying non-contention random access response information msgB;

[0344] Public PDSCH scheduled by temporary cell radio network temporary identifier TC-RNTI;

[0345] The common PDSCH is scheduled by the cell radio network temporary identifier C-RNTI.

[0346] In some embodiments, the second signaling is used to configure candidate retransmission times, and different first channels correspond to different candidate retransmission times.

[0347] In some embodiments, the candidate retransmission times include multiple, the third signaling is used to indicate the DAI value corresponding to the DAI domain, and the DAI value is used by the terminal device to determine the retransmission times from multiple candidate retransmission times.

[0348] In some embodiments, the third signaling is downlink control information DCI that schedules the first channel.

[0349] In some embodiments, the method further comprises:

[0350] Receive second information reported by the terminal device, the second information including at least one of the following: first capability information and a first request message, the first capability information is used to indicate that the terminal device supports repeated transmission of the first channel, and the first request message is used to request the network device to repeatedly transmit the first channel.

[0351] In some embodiments, the first information is used to indicate that the first channel is retransmitted in N time slots, and the value of N is the number of retransmissions.

[0352] FIG5 is an interactive diagram of a communication method according to an embodiment of the present disclosure. As shown in FIG5 , the embodiment of the present disclosure relates to a communication method, which can be executed by a communication system. The method may include:

[0353] Step S5101: The network device sends first information to the terminal device.

[0354] The optional implementation of step S5101 can be found in the optional implementation of step S2101 in Figure 2, step S3101 in Figure 3A, step S4101 in Figure 4A, and other related parts in the embodiments involved in Figures 2, 3A, and 4A, which will not be repeated here.

[0355] In some embodiments, the above method may include the method described in the embodiments of the above communication system, terminal equipment, network equipment, etc., which will not be repeated here.

[0356] In some embodiments, the communication method of the present disclosure may include the following embodiments:

[0357] Embodiment 1: The number of repetitions of the first channel is indicated by the second signaling and / or the third signaling for scheduling the first channel.

[0358] In the following examples, the second signaling is RRC, the first channel is msg4PDSCH, and the third signaling is DCI.

[0359] Example 1 (DCI only): When the UE reports the capability of supporting msg4repetition or the UE reports the msg4repetition request, the base station indicates the unique msg4PDSCH repetition number through the DCI scheduling msg4.

[0360] Example 2 (RRC only): When the UE reports that it has the capability to support msg4repetition, or the UE reports a msg4repetition request, the base station configures a unique msg4PDSCH repetition number through RRC signaling.

[0361] Example 3 (RRC+DCI): When the UE reports the capability to support msg4repetition or the UE reports a msg4repetition request, the base station configures more than one msg4PDSCH repetition times through RRC signaling, and then indicates one of the msg4PDSCH repetition times through the DCI that schedules msg4.

[0362] Example 2: Based on Example 1, the second signaling is sent by broadcasting.

[0363] Example 3: Based on Example 1, re-interpret indication is performed through the existing field in the third signaling.

[0364] Embodiment 4: Based on embodiment 3, the existing field is Time domain resource assignment. The table corresponding to Time domain resource assignment is modified, and the table includes the number of repetitions, so that the number of repetitions is also indicated to the UE when the TDRA is indicated.

[0365] Example 1: When the UE reports the capability to support msg4repetition, or the UE reports the msg4repetition request, and PDSCH-ConfigCommon does not include pdsch-TimeDomainAllocationList, then the table applied by TDRA in the DCI for scheduling msg4 is the second TDRA table, which is different from the first TDRA table. The second TDRA table contains a column for indicating the number of repetitions.

[0366] Example 2: If the UE reports the ability to support msg4repetition, or reports a msg4repetition request, and PDSCH-ConfigCommon contains pdsch-TimeDomainAllocationList_rep, then the table applied to TDRA in the DCI scheduling msg4 is pdsch-TimeDomainAllocationList_rep. Different from pdsch-TimeDomainAllocationList, pdsch-TimeDomainAllocationList_rep contains the configuration of the repetition number. The specific configuration method of the repetition number is as follows:

[0367] Example 5: Based on Example 4, if the UE does not report the capability of supporting msg4repetition, or the UE does not report msg4repetition request, the TDRA configuration applied by the UE is pdsch-TimeDomainAllocationList or the first TDRA table, which is consistent with the existing behavior.

[0368] Embodiment 6: Based on embodiment 3, the existing field is the Modulation and coding scheme field, and the high X bits of the field are used to indicate the number of repetitions, and the remaining 5-X bits indicate the MCS.

[0369] Example 1: When the UE reports the capability to support msg4repetition or reports a msg4repetition request, the UE determines the number of repetitions based on the upper two bits of the MCS field in the DCI that schedules msg4. The values ​​indicated by the upper two bits correspond to {1, 2, 4, 8}.

[0370] Example 2: If the UE reports the ability to support MSG4 repetitions or reports an MSG4 repetition request, the UE determines the number of repetitions based on the upper-order bit or two-digits of the MCS field in the DCI that schedules MSG4. The value indicated by the upper-order bit or two-digits corresponds to a set of values ​​configured by RRC. If the RRC-configured value is two, the upper-order bit of the MCS is used to determine the number of repetitions. If the RRC-configured value is greater than two, the upper-order two-digits of the MCS are used to determine the number of repetitions.

[0371] Example 7: Based on Example 6, if the UE does not report the capability of supporting msg4repetition, or the UE does not report msg4repetition request, the UE assumes that the effective number of bits of MCS is 5.

[0372] Example 8: Based on Example 3, the DAI field is used for indication.

[0373] Case 1: The UE supports msg4HARQ-ACK repetition (second channel) but does not support msg4repetition. The DAI value is only used to indicate one of a set of values ​​configured by RRC for msg4HARQ-ACK repetition, or reserved (RRC only configures one value).

[0374] Case 2: UE supports msg4HARQ-ACK repetition and msg4repetition.

[0375] Case 3: UE does not support msg4HARQ-ACK repetition but supports msg4repetition.

[0376] Case 4: UE does not support msg4HARQ-ACK repetition and does not support msg4repetition.

[0377] Considering the above four cases, we need to design a solution that is applicable to all four cases.

[0378] Solution 1: DAI is used to indicate only one of them. The UE does not want RRC to configure more than one repetition candidate for both msg4HARQ-ACK repetition and msg4repetition. For UEs that support both repetitions, the DAI value is used to indicate the channel for which RRC has configured multiple candidates, which is msg4HARQ-ACK or msg4. If RRC configures only one repetition value for both channels, the DAI field is reserved. If the UE supports repetition for only one of the channels, then when RRC configures multiple values ​​for that channel, the UE determines the unique repetition value through DAI.

[0379] Solution 2: RRC configures three types of repetition candidate values, namely, in addition to msg4HARQ-ACK repetition candidate, msg4repetition candidate, there is also msg4HARQ-ACK+msg4repetition candidate. The UE determines the corresponding candidate set based on its own reported support for repetition of different channels, and determines the repetition value of different channels based on the DAI value.

[0380] In one embodiment, msg4HARQ-ACK+msg4repetition candidate set={1,2,4,8}, and the repetition values ​​of the two channels are the same.

[0381] In one embodiment, msg4HARQ-ACK+msg4repetition candidate set={{2,1},{4,2}}, where the repetition values ​​of the two channels are different. For example, when the DAI indication is 2, it indicates msg4-HARQ-ACK repetition factor=4, msg4repetition factor=2.

[0382] Embodiment 9: Based on any of the above embodiments, repetition factor=N, indicating repeated transmission on N slots, with the symbol positions occupied by each slot being the same.

[0383] Embodiment 10: Based on any of the above embodiments, the second signaling is RRC, the third signaling is DCI for scheduling the first channel, the first channel is common PDSCH, and the common PDSCH includes at least one of the following:

[0384] CommonPDSCH carrying msg4;

[0385] CommonPDSCH carrying SIB1;

[0386] CommonPDSCH carrying msg2;

[0387] CommonPDSCH carrying msgB;

[0388] CommonPDSCH scheduled by TC-RNTI;

[0389] CommonPDSCH scheduled by C-RNTI.

[0390] In some embodiments, the second channel is msg4HARQ-ACK.

[0391] Embodiment 11: Based on any of the above embodiments, for msg4 (also commonPDSCH) scheduled by DCI scrambled by C-RNTI, in addition to multiplexing the methods in embodiments 1 to 10, it can also be determined by the following predefined rules:

[0392] Method 1: Multiplex the number of repetitions of the first channel;

[0393] Method 2: reuse the most recent UE-specific PDSCH repetition times;

[0394] Method 3: Predefined default value, such as 4;

[0395] Method 4: The specified value in the repetition times of the first channel configured by RRC, such as the maximum value.

[0396] In some embodiments of the present disclosure, a communication system is provided, which may include a terminal device and a network device, wherein the terminal device can execute the communication method executed by the terminal device in the aforementioned embodiment of the present disclosure; the network device can execute the communication method executed by the network device in the aforementioned embodiment of the present disclosure.

[0397] The embodiments of the present disclosure further provide an apparatus for implementing any of the above methods. For example, an apparatus is provided, comprising units or modules for implementing each step performed by a terminal in any of the above methods. For another example, another apparatus is provided, comprising units or modules for implementing each step performed by a network device (e.g., an access network device, a core network function node, a core network device, etc.) in any of the above methods.

[0398] It should be understood that the division of the various units or modules in the above device is merely a division of logical functions. In actual implementation, they may be fully or partially integrated into a physical entity, or they may be physically separated. In addition, the units or modules in the device may be implemented in the form of a processor calling software: for example, the device includes a processor, the processor is connected to a memory, and the memory stores instructions. The processor calls the instructions stored in the memory to implement any of the above methods or implement the functions of the various units or modules of the above device, wherein the processor is, for example, a general-purpose processor, such as a central processing unit (CPU) or a microprocessor, and the memory is a memory within the device or a memory outside the device. Alternatively, the units or modules in the device can be implemented in the form of hardware circuits, and the functions of some or all of the units or modules can be realized by designing the hardware circuits. The above-mentioned hardware circuits can be understood as one or more processors; for example, in one implementation, the above-mentioned hardware circuit is an application-specific integrated circuit (ASIC), and the functions of some or all of the above units or modules are realized by designing the logical relationship of the components in the circuit; for example, in another implementation, the above-mentioned hardware circuit can be realized by a programmable logic device (PLD). Taking a field programmable gate array (FPGA) as an example, it can include a large number of logic gate circuits, and the connection relationship between the logic gate circuits is configured by configuring the configuration file, thereby realizing the functions of some or all of the above units or modules. All units or modules of the above devices can be realized in the form of software called by the processor, or in the form of hardware circuits, or in part by the form of software called by the processor, and the rest by hardware circuits.

[0399] In the embodiments of the present disclosure, the processor is a circuit with signal processing capabilities. In one implementation, the processor can be a circuit with instruction reading and execution capabilities, such as a central processing unit (CPU), a microprocessor, a graphics processing unit (GPU) (which can be understood as a microprocessor), or a digital signal processor (DSP). In another implementation, the processor can implement certain functions through the logical relationship of a hardware circuit. The logical relationship of the above-mentioned hardware circuit is fixed or reconfigurable. For example, the processor is a hardware circuit implemented by an application-specific integrated circuit (ASIC) or a programmable logic device (PLD), such as an FPGA. In a reconfigurable hardware circuit, the process of the processor loading a configuration document to implement the hardware circuit configuration can be understood as the process of the processor loading instructions to implement the functions of some or all of the above units or modules. In addition, it can also be a hardware circuit designed for artificial intelligence, which can be understood as ASIC, such as a neural network processing unit (NPU), a tensor processing unit (TPU), a deep learning processing unit (DPU), etc.

[0400] Figure 6A is a structural diagram of a terminal device proposed in an embodiment of the present disclosure. As shown in Figure 6A, the terminal device 101 may include at least one of a transceiver module 6101, a processing module 6102, etc. In some embodiments, the transceiver module 6101 is configured to receive first information sent by a network device, where the first information is used to indicate the number of retransmissions of a first channel, and the first channel includes a common physical downlink shared channel PDSCH. Optionally, the transceiver module 6101 can be used to execute at least one of the communication steps such as sending and / or receiving (such as step S2101, but not limited to this) performed by the terminal device 101 in any of the above methods, which will not be repeated here.

[0401] In some embodiments, the transceiver module may include a transmitting module and / or a receiving module, and the transmitting module and the receiving module may be separate or integrated. Optionally, the transceiver module may be interchangeable with the transceiver.

[0402] Figure 6B is a structural diagram of a network device proposed in an embodiment of the present disclosure. As shown in Figure 6B, the network device 102 may include: at least one of a transceiver module 6201, a processing module 6202, etc. In some embodiments, the transceiver module 6201 is configured to send a first information to the terminal device, where the first information is used to indicate the number of retransmissions of the first channel, and the first channel includes a common physical downlink shared channel PDSCH. Optionally, the transceiver module 6201 can be used to perform at least one of the communication steps such as sending and / or receiving (such as step S2102, but not limited to this) performed by the network device 102 in any of the above methods, which will not be repeated here.

[0403] In some embodiments, the transceiver module may include a transmitting module and / or a receiving module, and the transmitting module and the receiving module may be separate or integrated. Optionally, the transceiver module may be interchangeable with the transceiver.

[0404] In some embodiments, the processing module can be a single module or can include multiple submodules. Optionally, the multiple submodules respectively execute all or part of the steps required to be executed by the processing module. Optionally, the processing module can be interchangeable with the processor.

[0405] Figure 7A is a schematic diagram of the structure of a communication device 7100 proposed in an embodiment of the present disclosure. Communication device 7100 can be a network device (e.g., an access network device, a core network device, etc.), a terminal (e.g., a user device, etc.), a chip, a chip system, or a processor that supports a first device to implement any of the above methods, or a chip, a chip system, or a processor that supports a terminal to implement any of the above methods. Communication device 7100 can be used to implement the methods described in the above method embodiments. For details, please refer to the description of the above method embodiments.

[0406] As shown in FIG7A , the communication device 7100 includes one or more processors 7101. The processor 7101 may be a general-purpose processor or a dedicated processor, for example, a baseband processor or a central processing unit. The baseband processor may be used to process communication protocols and communication data, and the central processing unit may be used to control a communication device (e.g., a base station, a baseband chip, an IoT device, an IoT device chip, a DU or CU, etc.), execute programs, and process program data. The communication device 7100 is used to perform any of the above methods.

[0407] In some embodiments, the communication device 7100 further includes one or more memories 7102 for storing instructions. Optionally, all or part of the memories 7102 may be located outside the communication device 7100.

[0408] In some embodiments, the communication device 7100 further includes one or more transceivers 7103. When the communication device 7100 includes one or more transceivers 7103, the transceiver 7103 performs at least one of the communication steps such as sending and / or receiving in the above method (for example, step S2101, but not limited thereto), and the processor 7101 performs at least one of the other steps.

[0409] In some embodiments, a transceiver may include a receiver and / or a transmitter. The receiver and transmitter may be separate or integrated. Optionally, the terms transceiver, transceiver unit, transceiver, and transceiver circuit may be used interchangeably; the terms transmitter, transmitting unit, transmitter, and transmitting circuit may be used interchangeably; and the terms receiver, receiving unit, receiver, and receiving circuit may be used interchangeably.

[0410] In some embodiments, the communication device 7100 may include one or more interface circuits. Optionally, the interface circuits are connected to the memory 7102 and may be used to receive signals from the memory 7102 or other devices, or to send signals to the memory 7102 or other devices. For example, the interface circuits may read instructions stored in the memory 7102 and send the instructions to the processor 7101.

[0411] The communication device 7100 described in the above embodiments may be a first device or an IoT device, but the scope of the communication device 7100 described in the present disclosure is not limited thereto, and the structure of the communication device 7100 may not be limited by FIG. 7A . The communication device may be an independent device or may be part of a larger device. For example, the communication device may be: 1) an independent integrated circuit IC, or a chip, or a chip system or subsystem; (2) a collection of one or more ICs, optionally, the above IC collection may also include a storage component for storing data or programs; (3) an ASIC, such as a modem; (4) a module that can be embedded in other devices; (5) a receiver, an IoT device, an intelligent IoT device, a cellular phone, a wireless device, a handheld device, a mobile unit, an in-vehicle device, a first device, a cloud device, an artificial intelligence device, etc.; (6) others, etc.

[0412] 7B is a schematic diagram of the structure of a chip 7200 proposed in an embodiment of the present disclosure. If the communication device 7100 can be a chip or a chip system, please refer to the schematic diagram of the structure of the chip 7200 shown in FIG7B , but the present disclosure is not limited thereto.

[0413] The chip 7200 includes one or more processors 7201 , and the chip 7200 is configured to execute any of the above methods.

[0414] In some embodiments, the chip 7200 further includes one or more interface circuits 7203. Optionally, the interface circuit 7203 is connected to the memory 7202. The interface circuit 7203 can be used to receive signals from the memory 7202 or other devices, and can be used to send signals to the memory 7202 or other devices. For example, the interface circuit 7203 can read instructions stored in the memory 7202 and send the instructions to the processor 7201.

[0415] In some embodiments, the interface circuit 7203 executes at least one of the communication steps such as sending and / or receiving in the above method (such as step S2101, but not limited thereto), and the processor 7201 executes at least one of the other steps.

[0416] In some embodiments, terms such as interface circuit, interface, transceiver pin, and transceiver may be used interchangeably.

[0417] In some embodiments, the chip 7200 further includes one or more memories 7202 for storing instructions. Alternatively, all or part of the memory 7202 may be external to the chip 7200.

[0418] The embodiments of the present disclosure further provide a storage medium having instructions stored thereon. When the instructions are executed on the communication device 7100, the communication device 7100 executes any of the above methods. Optionally, the storage medium is an electronic storage medium. Optionally, the storage medium is a computer-readable storage medium, but is not limited thereto, and may also be a storage medium readable by other devices. Optionally, the storage medium may be a non-transitory storage medium, but is not limited thereto, and may also be a temporary storage medium.

[0419] The present disclosure also provides a program product, which, when executed by the communication device 7100, enables the communication device 7100 to perform any of the above methods. Optionally, the program product may be a computer program product.

[0420] The embodiments of the present disclosure also provide a computer program, which, when executed on a computer, enables the computer to execute any one of the above methods.

Claims

1. A communication method, characterized in that: Executed by a terminal device, the method includes: First information sent by a network device is received, where the first information is used to indicate a number of retransmissions of a first channel, where the first channel includes a common physical downlink shared channel (PDSCH).

2. The method according to claim 1, characterized in that The receiving first information sent by the network device includes: Receive the first information sent by the network device through a first signaling, where the first signaling includes at least one of the following: a second signaling and a third signaling, where the second signaling is a radio resource control RRC, and the third signaling is a signaling for scheduling the first channel.

3. The method according to claim 2, characterized in that The second signaling is used to configure a plurality of first numbers, and the third signaling is used to determine the number of retransmissions from the plurality of first numbers.

4. The method according to claim 2 or 3, characterized in that The second signaling is sent by the network device in a broadcasting manner.

5. The method according to any one of claims 2 to 4, characterized in that: The first field in the third signaling is used to send the first information.

6. The method according to claim 5, characterized in that The first field is a time domain resource allocation TDRA field.

7. The method according to claim 6, characterized in that The method further comprises: Determining that the time domain resource information of the first channel is first time domain resource information, where the first time domain resource information is included in first indication information or a predefined table, the first time domain resource information includes time domain resource allocation information and retransmission number information, and the first indication information is used to configure the first channel; The number of retransmissions is determined according to the first time domain resource information and the TDRA field.

8. The method according to claim 5, characterized in that The first field is the modulation and coding strategy MCS field.

9. The method according to claim 8, characterized in that The high X bits of the MCS field are used to indicate the number of retransmissions.

10. The method according to claim 9, characterized in that The value of X is 1 or 2.

11. The method according to claim 5, characterized in that The first field is a downlink allocation index DAI field.

12. The method according to claim 11, characterized in that The first channel includes at least one of the following: a second channel and a third channel, the third channel includes a channel carrying contention resolution information hybrid automatic repeat request confirmation msg4 HARQ-ACK, and the second channel includes at least one of the following: Public PDSCH carrying contention resolution information msg4; Common PDSCH carrying system information block SIB1; Common PDSCH carrying contention random access response information msg2; Common PDSCH carrying non-contention random access response information msgB; Public PDSCH scheduled by temporary cell radio network temporary identifier TC-RNTI; The common PDSCH is scheduled by the cell radio network temporary identifier C-RNTI.

13. The method according to claim 12, characterized in that The second signaling is used to configure the candidate retransmission times, and different first channels correspond to different candidate retransmission times.

14. The method according to claim 13, characterized in that The method further comprises: The candidate retransmission number is used as the retransmission number of the first channel.

15. The method according to claim 13, characterized in that The candidate retransmission times include multiple ones, the third signaling is used to indicate the DAI value corresponding to the DAI field, and the method further includes: According to the DAI value, the number of retransmissions of the first channel is determined from a plurality of candidate retransmission numbers.

16. The method according to claim 15, characterized in that The candidate number of retransmissions includes a second number and a third number, and the method further includes: determining, according to the DAI value, a first candidate retransmission number from the multiple candidate retransmission numbers; The second number among the first candidate retransmission times is used as the retransmission times of the second channel, and the third number among the first candidate retransmission times is used as the retransmission times of the third channel.

17. The method according to any one of claims 1 to 16, characterized in that The method further comprises: Report second information to the network device, the second information including at least one of the following: first capability information and a first request message, the first capability information being used to indicate that the terminal device supports repeated transmission of the first channel, and the first request message being used to request the network device to repeatedly transmit the first channel.

18. The method according to any one of claims 1 to 17, characterized in that The first information is used to indicate that the first channel is retransmitted in N time slots, where the value of N is the number of retransmissions.

19. The method according to any one of claims 1 to 18, characterized in that The first channel is a channel carrying msg4 scheduled by the DCI scrambled by the C-RNTI, and the method further includes at least one of the following: The fourth number is used as the retransmission number, where the fourth number is the most recent retransmission number of the user equipment-specific physical downlink shared channel UE-specific PDSCH; Using a predefined fifth number as the number of retransmissions; The number of retransmissions is determined from multiple first numbers configured in the second signaling according to a first rule, where the first rule is a protocol agreement.

20. A communication method, characterized in that: Executed by a network device, the method includes: First information is sent to a terminal device, where the first information is used to indicate the number of retransmissions of a first channel, where the first channel includes a common physical downlink shared channel (PDSCH).

21. The method according to claim 20, characterized in that The sending of the first information to the terminal device includes: The first information is sent to the terminal device via a first signaling, where the first signaling includes at least one of the following: a second signaling and a third signaling, where the second signaling is a radio resource control RRC, and the third signaling is a signaling for scheduling the first channel.

22. The method according to claim 21, characterized in that The second signaling is used to configure a plurality of first numbers, and the third signaling is used to determine the number of retransmissions from the plurality of first numbers.

23. The method according to claim 21 or 22, characterized in that The second signaling is sent in a broadcast manner.

24. The method according to any one of claims 21 to 23, characterized in that The first field in the third signaling is used to send the first information.

25. The method according to claim 24, characterized in that The first field is a time domain resource allocation TDRA field.

26. The method according to claim 24, characterized in that The first field is the modulation and coding strategy MCS field.

27. The method according to claim 26, characterized in that The high X bits of the MCS field are used to indicate the number of retransmissions.

28. The method according to claim 27, characterized in that The value of X is 1 or 2.

29. The method according to claim 24, wherein The first field is a downlink allocation index DAI field.

30. The method according to claim 29, wherein The first channel includes at least one of the following: a second channel and a third channel, the third channel includes a channel carrying contention resolution information hybrid automatic repeat request confirmation msg4 HARQ-ACK, and the second channel includes at least one of the following: Public PDSCH carrying contention resolution information msg4; Common PDSCH carrying system information block SIB1; Common PDSCH carrying contention random access response information msg2; Common PDSCH carrying non-contention random access response information msgB; Public PDSCH scheduled by temporary cell radio network temporary identifier TC-RNTI; The common PDSCH is scheduled by the cell radio network temporary identifier C-RNTI.

31. The method according to claim 30, wherein The second signaling is used to configure the candidate retransmission times, and different first channels correspond to different candidate retransmission times.

32. The method according to claim 31, characterized in that The candidate retransmission times include multiple numbers, and the third signaling is used to indicate the DAI value corresponding to the DAI domain, and the DAI value is used by the terminal device to determine the retransmission times from multiple candidate retransmission times.

33. The method according to any one of claims 20 to 32, characterized in that The method further comprises: Receive second information reported by the terminal device, the second information including at least one of the following: first capability information and a first request message, the first capability information is used to indicate that the terminal device supports repeated transmission of the first channel, and the first request message is used to request the network device to repeatedly transmit the first channel.

34. The method according to any one of claims 20 to 33, characterized in that The first information is used to indicate that the first channel is retransmitted in N time slots, where the value of N is the number of retransmissions.

35. A terminal device, characterized in that: include: The transceiver module is configured to receive first information sent by a network device, where the first information is used to indicate the number of retransmissions of a first channel, where the first channel includes a common physical downlink shared channel (PDSCH).

36. A network device, characterized in that: include: The transceiver module is configured to send first information to the terminal device, where the first information is used to indicate the number of retransmissions of the first channel, and the first channel includes a common physical downlink shared channel PDSCH.

37. A communication device, characterized in that: include: one or more processors; The communication device is used to execute the communication method according to any one of claims 1 to 19 or claims 20 to 34.

38. A communication system, characterized in that: The communication system includes a terminal device and a network device, wherein the terminal device is configured to implement the communication method according to any one of claims 1 to 19, and the network device is configured to implement the communication method according to any one of claims 20 to 34.

39. A storage medium storing instructions, characterized in that: When the instruction is executed on a communication device, the communication device is caused to execute the communication method according to any one of claims 1 to 19 or claims 20 to 34.

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