Information transmission method and apparatus, and storage medium

Abstract

Provided in the present disclosure are an information transmission method and apparatus, and a storage medium. The method comprises: after re-selecting to a first cell, a terminal determining as newly transmitted data service data which is received for the first time and is transmitted by a network device in the first cell. By means of the present disclosure, the consistency between a network device and a terminal in understanding of newly transmitted data or re-transmitted data can be ensured, and a combined decoding error is avoided, thereby improving the reliability of transmission of service data.

Description

Information transmission method and device, and storage medium Technical Field

[0001] The present disclosure relates to the field of communications, and in particular to an information transmission method and device, and a storage medium. Background Art

[0002] At present, with the development of New Radio (NR) services, multiple services such as Multimedia Broadcast and Multicast Service (MBMS) and Multicast Broadcast Service (MBS) can be supported.

[0003] Summary of the Invention

[0004] In order to improve the reliability of business data transmission, embodiments of the present disclosure provide an information transmission method and device, and a storage medium.

[0005] According to a first aspect of an embodiment of the present disclosure, there is provided an information transmission method, including:

[0006] After reselecting the first cell, the terminal determines the service data transmitted by the network device of the first cell for the first time as new transmission data.

[0007] According to a second aspect of an embodiment of the present disclosure, there is provided an information transmission method, including:

[0008] The service data is transmitted to the terminal so that after the terminal reselects the first cell, the service data transmitted by the network device of the first cell for the first time is determined as the new transmission data.

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

[0010] The processing module is configured to, after reselecting to the first cell, determine the service data transmitted by the network device of the first cell for the first time as the new transmission data.

[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 transmit service data to the terminal, so that after the terminal reselects the first cell, it determines the service data transmitted by the network device of the first cell for the first time as new transmission data.

[0013] According to a fifth aspect of an embodiment of the present disclosure, a terminal is provided, including:

[0014] one or more processors;

[0015] The terminal is used to execute the information transmission method described in any one of the first aspects.

[0016] According to a sixth aspect of an embodiment of the present disclosure, a network device is provided, including:

[0017] one or more processors;

[0018] The network device is used to execute the method for information transmission described in any one of the second aspects.

[0019] According to the seventh aspect of an embodiment of the present disclosure, a communication system is provided, comprising a terminal and a network device, wherein the terminal is configured to implement the information transmission method described in any one of the first aspects, and the network device is configured to implement the information transmission method described in any one of the second aspects.

[0020] According to an eighth aspect of an embodiment of the present disclosure, a storage medium is provided, which stores instructions. When the instructions are executed on a communication device, the communication device executes the information transmission method as described in any one of the first aspect or the second aspect.

[0021] In the disclosed embodiment, after a terminal reselects to a first cell, it can identify service data first received from a network device in the first cell as newly transmitted data. This ensures that the network device and the terminal have consistent understanding of newly transmitted or retransmitted data, avoids combined decoding errors, and improves the reliability of service data transmission.

[0022] 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

[0023] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and, together with the description, serve to explain the principles of the invention.

[0024] FIG1 is an exemplary schematic diagram of the architecture of a communication system provided according to an embodiment of the present disclosure.

[0025] FIG2A is an exemplary interaction diagram of an information transmission method provided according to an embodiment of the present disclosure.

[0026] FIG2B is an exemplary interaction diagram of the information transmission method provided according to an embodiment of the present disclosure.

[0027] FIG3A is an exemplary interaction diagram of an information transmission method provided according to an embodiment of the present disclosure.

[0028] FIG3B is an exemplary interaction diagram of the information transmission method provided according to an embodiment of the present disclosure.

[0029] FIG3C is an exemplary interaction diagram of the information transmission method provided according to an embodiment of the present disclosure.

[0030] FIG3D is an exemplary interaction diagram of the information transmission method provided according to an embodiment of the present disclosure.

[0031] FIG4A is a schematic diagram of an exemplary interaction of a terminal provided according to an embodiment of the present disclosure.

[0032] FIG4B is a schematic diagram of an exemplary interaction of a network device according to an embodiment of the present disclosure.

[0033] FIG5A is a schematic diagram of an exemplary interaction of a communication device according to an embodiment of the present disclosure.

[0034] FIG5B is an exemplary interaction diagram of a chip provided according to an embodiment of the present disclosure. DETAILED DESCRIPTION

[0035] Exemplary embodiments will be described in detail herein, examples of which are illustrated in the accompanying drawings. In the following description, when referring to the drawings, like numbers in different figures represent like or similar elements unless otherwise indicated. The embodiments described in the following exemplary embodiments are not intended to represent all possible embodiments consistent with the present invention. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the present invention, as detailed in the appended claims.

[0036] The terms used in this disclosure are for the purpose of describing specific embodiments only and are not intended to limit the disclosure. As used in this disclosure and the appended claims, the singular forms "a," "an," "the," and "the" are intended to include the plural forms, unless the context clearly indicates otherwise. It should also be understood that the term "and / or" as used herein refers to and encompasses any and all possible combinations of at least one of the associated listed items.

[0037] It should be understood that although the terms first, second, third, etc. may be used in this disclosure to describe various messages, these messages should not be limited to these terms. These terms are only used to distinguish messages of the same type from each other. For example, a first message may also be referred to as a second message, and similarly, a second message may be referred to as a first message without departing from the scope of this disclosure. Depending on the context, the word "if" as used herein may be interpreted as "at the time of" or "when" or "in response to determining."

[0038] The embodiments of the present disclosure provide an information transmission method, an information transmission device, and a storage medium.

[0039] In a first aspect, an embodiment of the present disclosure provides an information transmission method, including:

[0040] After reselecting the first cell, the terminal determines the service data transmitted by the network device of the first cell for the first time as new transmission data.

[0041] In the above embodiment, after the terminal reselects to the first cell, the service data first received from the network device of the first cell can be determined as newly transmitted data. This ensures that the network device and the terminal have consistent understanding of newly transmitted or retransmitted data, avoids combined decoding errors, and improves the reliability of service data transmission.

[0042] In conjunction with some embodiments of the first aspect, in some embodiments, the method further includes:

[0043] receiving a first new data indicator NDI sent by the network device of the first cell, where the first NDI is associated with the service data transmitted by the network device of the first cell;

[0044] The first NDI is stored.

[0045] In the above embodiment, the terminal can receive and store the first NDI sent by the network device of the first cell, so as to subsequently determine whether the new service data transmitted by the network device of the first cell is new data or retransmitted data based on the new second NDI provided by the network device of the first cell and the stored first NDI, thereby ensuring that the network device and the terminal have the same understanding of the new data or retransmitted data, thereby improving the reliability of service transmission.

[0046] In conjunction with some embodiments of the first aspect, in some embodiments, the method further includes:

[0047] receiving a second NDI sent by the network device of the first cell, where the second NDI is associated with new service data transmitted by the network device of the first cell;

[0048] Based on the first NDI and the second NDI, new service data transmitted by the network device of the first cell is determined as new transmission data or retransmission data.

[0049] In the above embodiment, the terminal can determine whether the new service data transmitted by the network device of the first cell is new data or retransmitted data based on the new second NDI sent by the network device of the first cell and the stored first NDI, ensuring that the network device and the terminal have the same understanding of the new data or retransmitted data, thereby improving the reliability of service transmission.

[0050] In conjunction with some embodiments of the first aspect, in some embodiments, the method further includes:

[0051] Based on the scheduling indication information sent by the network device of the first cell, it is determined that the service data transmitted by the network device of the first cell is received for the first time.

[0052] In the above embodiment, the terminal can determine the service data sent by the network device of the first cell for the first time based on the scheduling indication information sent by the network device of the first cell, ensure that the network device and the terminal have the same understanding of the newly transmitted data or retransmitted data, and improve the reliability of service transmission.

[0053] In conjunction with some embodiments of the first aspect, in some embodiments, determining the service data transmitted by the network device of the first cell for the first time as the new transmission data includes any one of the following:

[0054] Initializing a first NDI, where the first NDI is associated with the service data transmitted by the network device of the first cell;

[0055] Clear the hybrid automatic repeat request HARQ buffer associated with the service.

[0056] In the above embodiment, the terminal may initialize the first NDI and / or clear the HARQ buffer associated with the service to ensure the reliability of service transmission.

[0057] In conjunction with some embodiments of the first aspect, in some embodiments, initializing the first NDI includes at least one of the following:

[0058] Determine that the first NDI is flipped;

[0059] Delete a third NDI, where the third NDI is a historical NDI stored before the terminal reselects the first cell.

[0060] In the above embodiment, when the terminal initializes the first NDI, it can determine that the first NDI is flipped and delete the third NDI, which is the historical NDI stored before the terminal reselects to the first cell, to ensure the reliability of service transmission.

[0061] In conjunction with some embodiments of the first aspect, in some embodiments, the terminal is at least one of the following:

[0062] Terminals that have joined the service session;

[0063] Supports terminals receiving service data in the radio resource control (RRC) non-connected state.

[0064] In the above embodiments, the terminal may include but is not limited to a terminal that has joined a service session, and / or a terminal that supports receiving service data in a non-connected state of radio resource control RRC, thereby improving the reliability of the service session and the reliability of the terminal receiving service data in a non-connected state of RRC.

[0065] In combination with some embodiments of the first aspect, in some embodiments, the first cell is a cell that supports the terminal to receive the service data in an RRC non-connected state.

[0066] In the above embodiment, the first cell entered by the terminal after reselection may be a cell that supports the terminal receiving the service data in the RRC non-connected state, thereby improving the reliability of the terminal receiving the service data in the RRC non-connected state.

[0067] In conjunction with some embodiments of the first aspect, in some embodiments, the service includes a multicast service.

[0068] In the above embodiment, the reliability of multicast service data transmission is improved.

[0069] In a second aspect, an embodiment of the present disclosure provides an information transmission method, including:

[0070] The service data is transmitted to the terminal so that after the terminal reselects the first cell, the service data transmitted by the network device of the first cell for the first time is determined as the new transmission data.

[0071] In the above embodiment, the network device of the first cell can transmit service data to a terminal in the first cell. After the terminal reselects the first cell, the terminal determines the service data first received from the network device of the first cell as newly transmitted data. The network device and the terminal have the same understanding of newly transmitted data or retransmitted data, thereby improving the reliability of service data transmission.

[0072] In conjunction with some embodiments of the second aspect, in some embodiments, the method further includes:

[0073] A first new data indicator (NDI) is sent to the terminal, so that the terminal stores the first NDI.

[0074] In conjunction with some embodiments of the second aspect, in some embodiments, the method further includes:

[0075] A second NDI is sent to the terminal, where the second NDI is associated with new service data transmitted by the network device of the first cell, so that the terminal determines the new service data as new transmission data or retransmission data based on the first NDI and the second NDI.

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

[0077] Scheduling indication information is sent to the terminal, where the scheduling indication information is used by the terminal to determine that the service data transmitted by the network device of the first cell is received for the first time.

[0078] In conjunction with some embodiments of the second aspect, in some embodiments, the terminal is at least one of the following:

[0079] Terminals that have joined the service session;

[0080] A terminal that supports receiving the service data in a radio resource control RRC non-connected state.

[0081] In combination with some embodiments of the second aspect, in some embodiments, the first cell is a cell that supports the terminal to receive service data in an RRC non-connected state.

[0082] In conjunction with some embodiments of the second aspect, in some embodiments, the service includes a multicast service.

[0083] In a third aspect, an embodiment of the present disclosure provides a terminal, including:

[0084] The processing module is configured to, after reselecting to the first cell, determine the service data transmitted by the network device of the first cell for the first time as the new transmission data.

[0085] In a fourth aspect, an embodiment of the present disclosure provides a network device, including:

[0086] The transceiver module is configured to transmit service data to the terminal, so that after the terminal reselects the first cell, it determines the service data transmitted by the network device of the first cell for the first time as new transmission data.

[0087] In a fifth aspect, an embodiment of the present disclosure provides a terminal, including:

[0088] one or more processors;

[0089] The terminal is used to execute the information transmission method described in any one of the first aspects.

[0090] In a sixth aspect, an embodiment of the present disclosure provides a network device, including:

[0091] one or more processors;

[0092] The network device is used to execute the method for information transmission described in any one of the second aspects.

[0093] In the seventh aspect, an embodiment of the present disclosure proposes a communication system, including a terminal and a network device, wherein the terminal is configured to implement the information transmission method described in any one of the first aspects, and the network device is configured to implement the information transmission method described in any one of the second aspects.

[0094] In an eighth aspect, an embodiment of the present disclosure proposes a storage medium storing instructions. When the instructions are executed on a communication device, the communication device executes the information transmission method as described in any one of the first aspect or the second aspect.

[0095] It is understandable that the above network devices, communication systems, storage media, and computer programs are all used to execute 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.

[0096] The present disclosure provides an information transmission method, apparatus, and storage medium. In some embodiments, the terms "information transmission method," "information processing method," and "communication method" are interchangeable; the terms "information transmission apparatus," "information processing apparatus," and "communication apparatus" are interchangeable; and the terms "information processing system," "communication system," and "communication system" are interchangeable.

[0097] 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.

[0098] 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.

[0099] 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.

[0100] 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.

[0101] In the embodiments of the present disclosure, “plurality” refers to two or more.

[0102] In some embodiments, the terms "at least one," "one or more," "a plurality of," "multiple," etc. may be used interchangeably.

[0103] 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.

[0104] 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.

[0105] 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.

[0106] 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.

[0107] In some embodiments, devices and equipment can be interpreted as physical or virtual, and their names are not limited to the names recorded in the embodiments. In some cases, they can also be understood as "equipment", "device", "circuit", "network element", "node", "function", "unit", "section", "system", "network", "entity", "subject", etc.

[0108] In some embodiments, "network" can be interpreted as devices included in the network, such as access network equipment, core network equipment, etc.

[0109] In some embodiments, "access network device (AN device)" may also be referred to as "radio access network device (RAN device)", "base station (BS)", "radio base station", "fixed station", and in some embodiments may also be understood as "node", "access point", "transmission point (TP)", "reception point (RP)", "transmission and / or reception point (TRP)" "panel", "antenna panel", "antenna array", "cell", "macro cell", "small cell", "femto cell", "pico cell", "sector", "cell group", "serving cell", "carrier", "component carrier", "bandwidth part (BWP)", etc.

[0110] In some embodiments, obtaining data, information, etc. may comply with the laws and regulations of the country where the data is obtained.

[0111] In some embodiments, data, information, etc. may be obtained with the user's consent.

[0112] 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.

[0113] FIG1 is a schematic diagram showing the architecture of a communication system according to an embodiment of the present disclosure.

[0114] As shown in FIG. 1 , a communication system 100 includes a terminal 101 and a network device 102 .

[0115] In some embodiments, the terminal 101 includes, for example, a mobile phone, a wearable device, an Internet of Things device, a car with communication function, a smart car, a tablet computer, a computer with wireless transceiver function, 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 a smart grid, a wireless terminal device in transportation safety, a wireless terminal device in a smart city, and at least one of a wireless terminal device in a smart home, but is not limited thereto.

[0116] In some embodiments, the network device 102 may include but is not limited to an access network device 102 - 1 and a core network device 102 - 2 .

[0117] In some embodiments, the access network device 102-1 is, for example, a node or device that accesses a terminal to a 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.

[0118] In some embodiments, the access network device 102-1 can be composed of a centralized unit (CU) and a distributed unit (DU), where the CU can also be called a 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.

[0119] In some embodiments, the core network device 102-2 may be a device including one or more network elements, or may be multiple devices or a group of devices. The network elements may be virtual or physical. The core network may include, for example, at least one of an Evolved Packet Core (EPC), a 5G Core Network (5GCN), and a Next Generation Core (NGC).

[0120] 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.

[0121] In some embodiments, in some embodiments, the terminal 101 is connected to the core network device 102-2 through the access network device 102-1.

[0122] 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.

[0123] 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 illustrative only. 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 relationships between the entities are illustrative only. The entities may be connected or disconnected, and the connection may be in any manner, including direct or indirect, wired or wireless.

[0124] 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, systems utilizing other communication methods, and next-generation systems based on these. Furthermore, a combination of multiple systems (for example, a combination of LTE or LTE-A with 5G) may also be used.

[0125] FIG2A is an interactive diagram of an information transmission method according to an embodiment of the present disclosure. As shown in FIG2A , the present disclosure embodiment relates to an information transmission method, which includes:

[0126] In step S2101 , the network device 102 sends a first new data indicator (NDI) to the terminal 101 .

[0127] In some embodiments, the network device 102 may be a network device of a first cell. For example, the first cell may be a cell that the terminal 101 enters after performing cell reselection.

[0128] In some embodiments, the first cell may be a cell that supports the terminal 101 to receive service data in the RRC non-connected state.

[0129] Exemplarily, the service includes a multicast service.

[0130] Exemplarily, the first cell may be a cell that supports the terminal 101 receiving service data in the RRC inactive state. For example, the first cell may be a cell that supports the terminal 101 receiving multicast service data in the RRC inactive state.

[0131] Exemplarily, the first cell may be a cell that supports the terminal 101 receiving service data in the RRC idle state. For example, the first cell may be a cell that supports the terminal 101 receiving multicast service data in the RRC idle state.

[0132] Exemplarily, the first cell may be a cell that supports the terminal 101 receiving service data in the RRC inactive state or the RRC idle state. For example, the first cell may be a cell that supports the terminal 101 receiving multicast service data in the RRC inactive state or the RRC idle state.

[0133] In some embodiments, terminal 101 may receive the first NDI.

[0134] In some embodiments, the network device 102 may carry the first NDI via downlink control information (DCI).

[0135] Exemplarily, the DCI may be used to schedule service data for the terminal.

[0136] The services disclosed herein may include but are not limited to multicast services.

[0137] The services disclosed herein may include broadcast services or any other services that allow the terminal 101 to receive service data in an RRC non-connected state.

[0138] In some embodiments, the state of terminal 101 includes but is not limited to any one of the following: RRC connected state; RRC non-connected state.

[0139] Among them, the RRC connection state may refer to an RRC connection being established between the terminal 101 and the network device 102.

[0140] Among them, the RRC non-connected state may refer to the absence of an RRC connection between the terminal 101 and the network device 102. Exemplarily, the RRC non-connected state may include but is not limited to an RRC idle state (IDLE) and an RRC inactive state (INACTIVE).

[0141] Exemplarily, the network device 102 schedules service data for the terminal 101 via DCI, which carries a first NDI. The terminal 101 can determine whether the service data scheduled by the network device 102 is new data or retransmitted data in combination with the previously stored NDI and the currently received first NDI.

[0142] It is understood that the newly transmitted data is the service data that the network device 102 schedules for transmission for the terminal 101 for the first time. The retransmitted data is the service data that the network device 102 transmits again for the terminal 101 based on the hybrid automatic repeat request (HARQ) results reported by the terminal 101 and / or other terminals.

[0143] Exemplarily, the service includes a multicast service, and the DCI is used to schedule multicast service data for the terminal 101 .

[0144] In some embodiments, the network device 102 may also carry the first NDI through other signaling or messages, which is not limited in this disclosure.

[0145] Step S2102 , the network device 102 transmits service data to the terminal 101 .

[0146] In some embodiments, terminal 101 receives the service data.

[0147] In some embodiments, the terminal 101 receives the service data based on the scheduling of the DCI.

[0148] In some embodiments, after reselecting the first cell, the terminal 101 receives service data transmitted by the network device 102 of the first cell.

[0149] Exemplarily, the service includes a multicast service, and the terminal 101 can receive multicast service data transmitted by the network device 102 .

[0150] Exemplarily, the service includes a multicast service. After reselecting the first cell, the terminal 101 receives multicast service data transmitted by the network device 102 of the first cell.

[0151] In some embodiments, the first cell may be a cell that supports the terminal 101 to receive service data in the RRC non-connected state.

[0152] Exemplarily, the service includes a multicast service.

[0153] Exemplarily, the first cell may be a cell that supports the terminal 101 receiving service data in the RRC inactive state. For example, the first cell may be a cell that supports the terminal 101 receiving multicast service data in the RRC inactive state.

[0154] Exemplarily, the first cell may be a cell that supports the terminal 101 receiving service data in the RRC idle state. For example, the first cell may be a cell that supports the terminal 101 receiving multicast service data in the RRC idle state.

[0155] Exemplarily, the first cell may be a cell that supports the terminal 101 receiving service data in the RRC inactive state or the RRC idle state. For example, the first cell may be a cell that supports the terminal 101 receiving multicast service data in the RRC inactive state or the RRC idle state.

[0156] Step S2103 , the network device 102 sends scheduling indication information to the terminal 101 .

[0157] In some embodiments, terminal 101 receives the scheduling indication information.

[0158] In some embodiments, the network device 102 is a network device of the first cell, and after determining that the terminal 101 has reselected to the first cell, the network device 102 sends the scheduling indication information to the terminal 101.

[0159] In some embodiments, the scheduling indication information is used by the terminal 101 to determine that the service data transmitted by the network device 102 is received for the first time.

[0160] Exemplarily, the network device 102 sends the scheduling indication information to the terminal 101 through a separate signaling.

[0161] Exemplarily, the network device 102 carries the scheduling indication information in other signaling or messages sent to the terminal. For example, the network device 102 may carry the scheduling indication information in a scheduling message or scheduling signaling sent to the terminal 101.

[0162] In some embodiments, the name of the scheduling indication information is not limited, and it can be, for example, an indication message, a first signaling, a first message, etc.

[0163] In step S2104, after the terminal 101 reselects the first cell, the terminal 101 determines the service data transmitted by the network device 102 of the first cell received for the first time as the new transmission data.

[0164] In some embodiments, the network device 102 does not perform the above step S2103. After the terminal 101 reselects the first cell, it determines the service data transmitted by the network device 102 of the first cell that is first received based on predefined rules or protocol agreements.

[0165] In some embodiments, the network device 102 executes the above step S2103, and the terminal 101 can receive the scheduling indication information sent by the network device 102 after reselecting the first cell, and determine the service data transmitted by the network device 102 of the first cell for the first time based on the scheduling indication information.

[0166] In some embodiments, after receiving service data transmitted by the network device 102 of the first cell for the first time, the terminal 101 determines the service data as new transmission data.

[0167] In one example, the terminal 101 determining that the service data is the newly transmitted data may include, but is not limited to, initializing a first NDI, where the first NDI is associated with the service data transmitted by the network device 102 .

[0168] Exemplarily, initializing the first NDI may include but is not limited to at least one of the following: determining that the first NDI is flipped; and deleting the third NDI.

[0169] The third NDI is a historical NDI stored before the terminal reselects the first cell.

[0170] Exemplarily, the terminal 101 determines that the first NDI is flipped.

[0171] When the terminal 101 determines that the indication of the currently received NDI is different from the indication of the previously stored NDI, it determines that the NDI is flipped. In the embodiment of the present disclosure, regardless of whether the indication of the first NDI is the same as the indication of the NDI stored on the terminal 101, the terminal 101 determines that the indication of the first NDI is flipped relative to the indication of the NDI stored on the terminal 101. For example, the terminal 101 can directly ignore the indication of the first NDI sent by the network device 102 and determine that the first NDI is flipped.

[0172] For example, the terminal 101 reselects to the first cell. In response to receiving the service data transmitted by the network device 102 of the first cell for the first time, such as multicast service data, the first NDI can be regarded as a flip, and the transmission can be regarded as a new transmission. At this time, for the terminal 101, no matter what the first NDI indicates, the terminal 101 ignores the indication of the first NDI.

[0173] Exemplarily, the terminal 101 may delete a previously stored third NDI, which is a historical NDI stored before the terminal reselects to the first cell.

[0174] For example, the terminal 101 reselects the first cell, deletes the previously stored third NDI, and responds to the first reception of service data transmitted by the network device 102 of the first cell, such as multicast service data. Since the terminal 101 has not stored any NDI before, the received service data can be regarded as new transmission data regardless of what the first NDI indicates.

[0175] In an example, the terminal 101 determines that the service data is new transmission data, which may include but is not limited to clearing the HARQ buffer associated with the service.

[0176] Exemplarily, the service may include a multicast service, and the terminal 101 may clear the HARQ buffer associated with the multicast service.

[0177] Exemplarily, the terminal 101 only uses a HARQ buffer associated with the service.

[0178] Exemplarily, the terminal 101 clears all HARQ buffers, including the HARQ buffer associated with the service.

[0179] In an example, the terminal 101 determines that the service data is the new transmission data, which may include but is not limited to initializing the first NDI and clearing the HARQ buffer associated with the service.

[0180] In some embodiments, the terminal 101 may be a terminal that has joined a service session.

[0181] Exemplarily, the terminal 101 may be a terminal that has joined a multicast service session.

[0182] In some embodiments, the terminal 101 may be a terminal that supports receiving the service data in a radio resource control RRC non-connected state.

[0183] Exemplarily, the terminal 101 may be a terminal that supports receiving service data in an RRC inactive state. For example, the terminal 101 may be a terminal that supports receiving multicast service data in an RRC inactive state.

[0184] Exemplarily, the terminal 101 may be a terminal that supports receiving service data in the RRC idle state. For example, the terminal 101 may be a terminal that supports receiving multicast service data in the RRC idle state.

[0185] Exemplarily, terminal 101 may be a terminal that supports receiving service data in an RRC inactive state or an RRC idle state. For example, terminal 101 may be a terminal that supports receiving multicast service data in an RRC inactive state or an RRC idle state.

[0186] Step S2105: Terminal 101 stores the first NDI.

[0187] In some embodiments, the terminal 101 may store the first NDI sent by the network device 102. The first NDI is associated with service data transmitted by the network device 102 of the first cell.

[0188] The association of the first NDI with the service data transmitted by the network device 102 of the first cell can be understood as: the terminal 101 determines whether the service data is new transmission data or retransmission data at least according to the indication of the first NDI.

[0189] In some embodiments, the terminal 101 determines the business data received for the first time from the network device 102 as new transmission data, and stores the first NDI.

[0190] Exemplarily, if the terminal 101 deletes the third NDI, the first NDI may be directly stored.

[0191] Exemplarily, terminal 101 ignores the first NDI indication sent by network device 102 and determines that the first NDI is flipped. Further, terminal 101 may store the first NDI. It should be noted that, at this time, although terminal 101 determines the received service data as new transmission data, terminal 101 stores the content regardless of the content indicated by the first NDI. For example, if the bit value of the first NDI is "1" or "0", the terminal directly stores the bit value "1" or "0" of the first NDI.

[0192] Exemplarily, the terminal 101 has cleared the HARQ buffer associated with the service, and the terminal 101 may directly store the first NDI.

[0193] In some embodiments, the purpose of storing the first NDI is to enable the terminal 101 to determine whether the new business data is newly transmitted data or retransmitted data when the network device 102 subsequently transmits new business data.

[0194] Exemplarily, the terminal 101 receives a new NDI sent by the network device 102 again, where the new NDI is a second NDI, wherein the second NDI is associated with the new service data transmitted by the network device 102. The association of the second NDI with the new service data transmitted by the network device 102 may mean that the terminal 101 determines that the new service data is new transmission data or retransmission data at least according to the indication of the second NDI.

[0195] The terminal 101 may compare the stored first NDI and the second NDI to see if they are consistent. If they are consistent, for example, the bit values ​​of the stored first NDI and the second NDI are both "1" or "0", the terminal 101 determines that the new service data transmitted by the network device 102 is retransmission data. If they are inconsistent, for example, the bit value of the stored first NDI is "1" and the bit value of the second NDI is "0", or the bit value of the stored first NDI is "0" and the bit value of the second NDI is "1", the terminal 101 determines that the new service data transmitted by the network device 102 is new transmission data.

[0196] 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.

[0197] In some embodiments, the terms "uplink", "uplink", "physical uplink", etc. can be used interchangeably.

[0198] In some embodiments, the terms "downlink", "physical downlink", etc. can be used interchangeably.

[0199] In some embodiments, terms such as "send", "transmit", "report", "download", "transmit", "bidirectional transmission", "send and / or receive" can be used interchangeably.

[0200] 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.

[0201] In some embodiments, terms such as "certain", "preseted", "preset", "setting", "indicated", "a certain", "any", "first", and "designated" 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.

[0202] In some embodiments, the information transmission method involved in the embodiments of the present disclosure may include at least one of steps S2101 to S2105. For example, step S2101 can be implemented as an independent embodiment, step S2102 can be implemented as an independent embodiment, steps S2101+S2102 can be implemented as an independent embodiment, step S2103 can be implemented as an independent embodiment, step S2104 can be implemented as an independent embodiment, steps S2103+S2104 can be implemented as an independent embodiment, step S2105 can be implemented as an independent embodiment, and steps S2101 to S2103 can be implemented as independent embodiments, but are not limited thereto.

[0203] In some embodiments, step S2101 is optional, and one or more of these steps may be omitted or replaced in different embodiments. For example, if the terminal 101 does not need to determine whether the service data is new transmission data or retransmission data based on the indication of the NDI, step S2101 may not be performed.

[0204] In some embodiments, step S2102 is optional, and one or more of these steps may be omitted or replaced in different embodiments. For example, if the network device 102 has no service data to transmit, step S2102 may not be performed.

[0205] In some embodiments, step S2103 is optional, and one or more of these steps may be omitted or replaced in different embodiments. For example, if terminal 101 determines, based on predefined rules or protocol agreements, that it has received service data transmitted by network device 102 for the first time, step S2103 may not be performed.

[0206] In some embodiments, step S2104 is optional, and one or more of these steps may be omitted or replaced in different embodiments. For example, if the cell reselected by terminal 101 does not support terminal 101 receiving service data in the RRC non-connected state, and terminal 101 enters the RRC non-connected state, terminal 101 will not receive service data transmitted by network device 102, and will not determine whether the service data is new data or retransmitted data, then step S2104 may not be performed.

[0207] In some embodiments, step S2105 is optional, and one or more of these steps may be omitted or replaced in different embodiments. For example, if the terminal 101 does not rely on the NDI indication to determine whether the service data is new data or retransmission data, step S2105 may not be performed.

[0208] In some embodiments, the present disclosure does not limit the execution order of steps S2102 and S2103.

[0209] In some embodiments, steps S2101 to S2105 are optional, and one or more of these steps may be omitted or replaced in different embodiments.

[0210] In the above embodiment, it is possible to ensure that the network device and the terminal have consistent understanding of the newly transmitted data or the retransmitted data, avoid combined decoding errors, and improve the reliability of service data transmission.

[0211] FIG2B is an interactive diagram of an information transmission method according to an embodiment of the present disclosure. As shown in FIG2B , the present disclosure embodiment relates to an information transmission method, which includes:

[0212] Step S2201 , the network device 102 transmits service data to the terminal 101 .

[0213] In some embodiments, terminal 101 receives the service data.

[0214] In some embodiments, the terminal 101 receives the service data based on the scheduling of the DCI.

[0215] In some embodiments, after reselecting the first cell, the terminal 101 receives service data transmitted by the network device 102 of the first cell.

[0216] In some embodiments, the service includes a multicast service, and the terminal 101 can receive multicast service data transmitted by the network device 102 .

[0217] In some embodiments, the service includes a multicast service. After the terminal 101 reselects the first cell, it receives the multicast service data transmitted by the network device 102 of the first cell.

[0218] In some embodiments, the first cell may be a cell that supports the terminal 101 to receive service data in the RRC non-connected state.

[0219] Exemplarily, the first cell may be a cell that supports the terminal 101 to receive service data in an RRC inactive state.

[0220] Exemplarily, the first cell may be a cell that supports the terminal 101 to receive service data in the RRC idle state.

[0221] Exemplarily, the first cell may be a cell that supports the terminal 101 to receive service data in an RRC inactive state or an RRC idle state.

[0222] In step S2202, the terminal 101 determines the service data transmitted by the network device 102 as new transmission data or retransmission data.

[0223] In some embodiments, the network device 102 transmits the service data in a repetition manner. The service data may be multicast service data, for example, service data transmitted via a multicast MBS Transmission Channel (MTCH).

[0224] In some embodiments, regardless of whether the terminal 101 receives the service data transmitted by the network device 102 for the first time, it can determine whether the received service data is new data or retransmitted data based on the indication of the RRC message sent by the network device 102.

[0225] For example, the RRC message indicates that the number of repetitions is 4 and also indicates that the current repetition is the first repetition. The terminal determines that the received service data is new transmission data.

[0226] For another example, the RRC message indicates that the number of repetitions is 4, and further indicates that the current repetition is the second, third, or fourth repetition, and the terminal determines that the received service data is retransmission data.

[0227] In some embodiments, regardless of whether the terminal 101 receives the service data transmitted by the network device 102 for the first time, it can determine whether the received service data is new transmission data or retransmission data based on the scheduling of the DCI sent by the network device 102.

[0228] For example, the DCI indicates that the currently scheduled repetition is the first of four repetitions, and the terminal determines that the received service data is new transmission data.

[0229] For another example, the DCI indicates that the currently scheduled repetition is the second, third, or fourth repetition among four repetitions, and the terminal determines that the received service data is retransmission data.

[0230] In some embodiments, the terminal 101 may determine whether the received service data is new transmission data or retransmission data based on the indication of the RRC message and the scheduling of the DCI.

[0231] For example, the network device 102 indicates that the number of repetitions is 4 through the RRC message, and the DCI indicates that the current scheduling is the nth repetition. When n is 1, the terminal 101 determines that the service data is new data. When n is 2, 3, or 4, the terminal 101 determines that the service data is retransmitted data.

[0232] In some embodiments, the information transmission method involved in the embodiments of the present disclosure may include at least one of steps S2201 and S2202. For example, step S2201 may be implemented as an independent embodiment, step S2202 may be implemented as an independent embodiment, and steps S2201+S2202 may be implemented as independent embodiments, but are not limited thereto.

[0233] In some embodiments, step S2201 is optional, and one or more of these steps may be omitted or replaced in different embodiments. For example, if network device 102 does not have any service data to transmit to terminal 101, step S2201 may not be performed. Accordingly, step S2202 may not be performed.

[0234] In some embodiments, step S2202 is optional, and one or more of these steps may be omitted or replaced in different embodiments. For example, if the cell reselected by terminal 101 does not support terminal 101 receiving service data in the RRC non-connected state, and terminal 101 enters the RRC non-connected state, terminal 101 will not receive service data transmitted by network device 102, and will not determine whether the service data received at this time is new data or retransmitted data, then step S2202 may not be performed.

[0235] In some embodiments, steps S2201 to S2202 are optional, and one or more of these steps may be omitted or replaced in different embodiments.

[0236] In the above embodiment, the terminal can determine whether the received service data is new data or retransmitted data based on the RRC message and / or DCI indication sent by the network device, ensure that the network device and the terminal have the same understanding of the new data or retransmitted data, avoid combined decoding errors, and improve the reliability of service data transmission.

[0237] FIG3A is a flow chart of an information transmission method according to an embodiment of the present disclosure. As shown in FIG3A , the present disclosure embodiment relates to an information transmission method, which can be executed by terminal 101 and includes:

[0238] Step S3101, obtain the first NDI.

[0239] In some embodiments, the terminal 101 may obtain the first NDI from the network device 102, but is not limited thereto and may also receive the first NDI sent by other entities.

[0240] In some embodiments, the terminal 101 obtains the first NDI determined according to a predefined rule.

[0241] In some embodiments, terminal 101 performs processing to obtain the first NDI.

[0242] In some embodiments, step S3101 is omitted, the terminal 101 autonomously implements the function indicated by the first NDI, or the terminal 101 obtains the first NDI based on predefined rules or protocol agreements, or the above functions are default or default.

[0243] In some embodiments, the optional implementation of step S3101 can refer to the optional implementation of step S2101 in Figure 2A and other related parts of the embodiment involved in Figure 2A, which will not be repeated here.

[0244] Step S3102, obtain business data.

[0245] In some embodiments, the terminal 101 may obtain service data from the network device 102, but is not limited thereto and may also receive service data sent by other entities.

[0246] In some embodiments, the terminal 101 obtains the service data determined according to predefined rules.

[0247] In some embodiments, the terminal 101 performs processing to obtain the service data.

[0248] In some embodiments, step S3102 is omitted, the terminal 101 autonomously implements the function indicated by the business data, or the terminal 101 obtains the business data based on predefined rules or protocol agreements, or the above functions are default or acquiescent.

[0249] Among them, the first NDI is associated with the above-mentioned business data.

[0250] In some embodiments, the optional implementation of step S3102 can refer to the optional implementation of step S2102 in Figure 2A and other related parts of the embodiment involved in Figure 2A, which will not be repeated here.

[0251] Step S3103: Obtain scheduling instruction information.

[0252] In some embodiments, the terminal 101 may obtain the scheduling indication information from the network device 102, but is not limited thereto. The terminal 101 may also receive the scheduling indication information sent by other entities.

[0253] In some embodiments, the terminal 101 obtains the scheduling indication information determined according to a predefined rule.

[0254] In some embodiments, the terminal 101 performs processing to obtain the scheduling indication information.

[0255] In some embodiments, step S3102 is omitted, the terminal 101 autonomously implements the function indicated by the scheduling indication information, or the terminal 101 obtains the scheduling indication information based on predefined rules or protocol agreements, or the above functions are default or default.

[0256] In some embodiments, the optional implementation of step S3103 can refer to the optional implementation of step S2103 in Figure 2A and other related parts of the embodiment involved in Figure 2A, which will not be repeated here.

[0257] Step S3104: determine the service data as new transmission data or retransmission data.

[0258] In some embodiments, when the terminal 101 receives service data transmitted by the network device 102 of the first cell for the first time, the service data may be determined as new transmission data.

[0259] The optional implementation of step S3104 can refer to the optional implementation of step S2104 in Figure 2A and other related parts in the embodiment involved in Figure 2A, which will not be repeated here.

[0260] In some embodiments, the terminal 101 does not receive the service data transmitted by the network device 102 of the first cell for the first time, and can determine whether the currently received service data is new data or retransmitted data based on a comparison between a stored NDI and a newly received NDI.

[0261] Step S3105: store the first NDI.

[0262] In some embodiments, the optional implementation of step S3105 can refer to the optional implementation of step S2105 in Figure 2A and other related parts of the embodiment involved in Figure 2A, which will not be repeated here.

[0263] In some embodiments, the information transmission method involved in the embodiments of the present disclosure may include at least one of steps S3101 to S3105. For example, step S3101 can be implemented as an independent embodiment, step S3102 can be implemented as an independent embodiment, steps S3101+S3102 can be implemented as an independent embodiment, step S3103 can be implemented as an independent embodiment, step S3104 can be implemented as an independent embodiment, steps S3103+S3104 can be implemented as an independent embodiment, step S3105 can be implemented as an independent embodiment, and steps S3101 to S3103 can be implemented as independent embodiments, but are not limited thereto.

[0264] In some embodiments, step S3101 is optional, and one or more of these steps may be omitted or replaced in different embodiments. For example, if the terminal 101 does not need to determine whether the service data is new data or retransmission data based on the NDI, step S3101 may not be performed.

[0265] In some embodiments, step S3102 is optional, and one or more of these steps may be omitted or replaced in different embodiments. For example, if the network device 102 has no service data to transmit, step S3102 may not be performed.

[0266] In some embodiments, step S3103 is optional, and one or more of these steps may be omitted or replaced in different embodiments. For example, if terminal 101 determines, based on predefined rules or protocol agreements, that it has received service data transmitted by network device 102 for the first time, step S3103 may not be performed.

[0267] In some embodiments, step S3104 is optional, and one or more of these steps may be omitted or replaced in different embodiments. For example, if the cell reselected by terminal 101 does not support terminal 101 receiving service data in the RRC non-connected state, and terminal 101 enters the RRC non-connected state, terminal 101 will not receive service data transmitted by network device 102, and will not determine whether the service data is new data or retransmitted data, then step S3104 may not be performed.

[0268] In some embodiments, step S3105 is optional, and one or more of these steps may be omitted or replaced in different embodiments. For example, if the terminal 101 does not rely on the NDI indication to determine whether the service data is new data or retransmission data, step S3105 may not be performed.

[0269] In some embodiments, steps S3101 to S3105 are optional, and one or more of these steps may be omitted or replaced in different embodiments.

[0270] In the above embodiment, the terminal can determine the service data transmitted by the network device for the first time when receiving it as new data, ensuring that the network device and the terminal have the same understanding of the new data or retransmitted data, avoiding combined decoding errors, and improving the reliability of service data transmission.

[0271] FIG3B is a flow chart of an information transmission method according to an embodiment of the present disclosure. As shown in FIG3B , the embodiment of the present disclosure relates to an information transmission method, which can be executed by terminal 101 and includes:

[0272] Step S3201, obtain business data.

[0273] In some embodiments, the terminal 101 may obtain service data from the network device 102, but is not limited thereto and may also receive service data sent by other entities.

[0274] In some embodiments, the terminal 101 obtains the service data determined according to predefined rules.

[0275] In some embodiments, the terminal 101 performs processing to obtain the service data.

[0276] In some embodiments, step S3201 is omitted, the terminal 101 autonomously implements the function indicated by the business data, or the terminal 101 obtains the business data based on predefined rules or protocol agreements, or the above functions are default or default.

[0277] In some embodiments, the optional implementation of step S3201 can refer to the optional implementation of step S2201 in Figure 2B and other related parts of the embodiment involved in Figure 2B, which will not be repeated here.

[0278] Step S3202: Determine the service data as new transmission data or retransmission data.

[0279] In some embodiments, the optional implementation of step S3202 can refer to the optional implementation of step S2202 in Figure 2B and other related parts of the embodiment involved in Figure 2B, which will not be repeated here.

[0280] In some embodiments, the information transmission method involved in the embodiments of the present disclosure may include at least one of steps S3201 and S3202. For example, step S3201 may be implemented as an independent embodiment, step S3202 may be implemented as an independent embodiment, and steps S3201+S3202 may be implemented as independent embodiments, but are not limited thereto.

[0281] In some embodiments, step S3201 is optional, and one or more of these steps may be omitted or replaced in different embodiments. For example, if network device 102 does not have service data to transmit to terminal 101, step S3201 may not be performed. Accordingly, step S3202 may not be performed.

[0282] In some embodiments, step S3202 is optional, and one or more of these steps may be omitted or replaced in different embodiments. For example, if the cell reselected by terminal 101 does not support terminal 101 receiving service data in the RRC non-connected state, and terminal 101 enters the RRC non-connected state, terminal 101 will not receive service data transmitted by network device 102, and will not determine whether the service data received at this time is new data or retransmitted data, then step S3202 may not be performed.

[0283] In some embodiments, steps S3201 to S3202 are optional, and one or more of these steps may be omitted or replaced in different embodiments.

[0284] In the above embodiment, the terminal can determine whether the received service data is new transmission data or retransmission data based on the RRC message or DCI indication sent by the network device, ensure that the network device and the terminal have the same understanding of the new transmission data or retransmission data, avoid combined decoding errors, and improve the reliability of service data transmission.

[0285] FIG3C is a flow chart of an information transmission method according to an embodiment of the present disclosure. As shown in FIG3C , the present disclosure embodiment relates to an information transmission method, which can be executed by the network device 102, and includes:

[0286] Step S3301, send the first NDI.

[0287] In some embodiments, the network device 102 may send a first NDI to the terminal 101 .

[0288] In some embodiments, terminal 101 receives the first NDI.

[0289] In some embodiments, the optional implementation of step S3301 can refer to the optional implementation of step S2101 in Figure 2A and other related parts of the embodiment involved in Figure 2A, which will not be repeated here.

[0290] Step S3302: Transmit business data.

[0291] In some embodiments, the network device 102 may transmit service data to the terminal 101 .

[0292] In some embodiments, terminal 101 receives the service data.

[0293] In some embodiments, the optional implementation of step S3302 can refer to the optional implementation of step S2102 in Figure 2A and other related parts of the embodiment involved in Figure 2A, which will not be repeated here.

[0294] Step S3303: Send scheduling indication information.

[0295] In some embodiments, the network device 102 may send scheduling indication information to the terminal 101 .

[0296] In some embodiments, terminal 101 receives the scheduling indication information.

[0297] In some embodiments, the optional implementation of step S3303 can refer to the optional implementation of step S2103 in Figure 2A and other related parts of the embodiment involved in Figure 2A, which will not be repeated here.

[0298] In some embodiments, the information transmission method involved in the embodiments of the present disclosure may include at least one of steps S3301 to S3303. For example, step S3301 can be implemented as an independent embodiment, step S3302 can be implemented as an independent embodiment, steps S3301+S3302 can be implemented as an independent embodiment, step S3303 can be implemented as an independent embodiment, and steps S3301 to S3303 can be implemented as independent embodiments, but are not limited thereto.

[0299] In some embodiments, step S3301 is optional, and one or more of these steps may be omitted or replaced in different embodiments. For example, if the terminal 101 does not need to determine whether the service data is new data or retransmission data based on the NDI, step S3301 may not be performed.

[0300] In some embodiments, step S3302 is optional, and one or more of these steps may be omitted or replaced in different embodiments. For example, if the network device 102 has no service data to transmit, step S3302 may not be performed.

[0301] In some embodiments, step S3303 is optional, and one or more of these steps may be omitted or replaced in different embodiments. For example, if terminal 101 determines, based on predefined rules or protocol agreements, that it has received service data transmitted by network device 102 for the first time, step S3303 may not be performed.

[0302] In some embodiments, steps S3301 to S3303 are optional, and one or more of these steps may be omitted or replaced in different embodiments.

[0303] In the above embodiment, the network device can send NDI to the terminal to allow the terminal to determine whether the received service data is new data or retransmitted data, ensuring that the network device and the terminal have the same understanding of the new data or retransmitted data, avoiding combined decoding errors, and improving the reliability of service data transmission.

[0304] FIG3D is a flow chart of an information transmission method according to an embodiment of the present disclosure. As shown in FIG3D , the present disclosure embodiment relates to an information transmission method, which can be executed by the network device 102, and includes:

[0305] Step S3401: Transmit business data.

[0306] In some embodiments, the network device 102 may transmit service data to the terminal 101 .

[0307] In some embodiments, terminal 101 receives the service data.

[0308] In some embodiments, the optional implementation of step S3401 can refer to the optional implementation of step S2201 in Figure 2B and other related parts of the embodiment involved in Figure 2B, which will not be repeated here.

[0309] In some embodiments, the terminal 101 may determine whether the service data is new transmission data or retransmission data based on the RRC message or DCI sent by the network device 102 .

[0310] In the above embodiment, the network device may not send any NDI to the terminal, but instead use RRC messages and / or DCI to allow the terminal to determine whether the received service data is new data or retransmitted data, thereby ensuring that the network device and the terminal have the same understanding of the new data or retransmitted data, avoiding combined decoding errors, and improving the reliability of service data transmission.

[0311] The above process is further illustrated by the following examples:

[0312] In the NR system, MBS services can be marked with the following MBS service identifiers:

[0313] Temporary Mobile Group Identity (TMGI);

[0314] MBS Session ID;

[0315] MBS QoS flow ID.

[0316] MBS service delivery modes include the following two:

[0317] In transmission mode 1 (multicast transmission), the terminal enters the RRC connection state to receive the reception configuration information of the MBS service, thereby receiving the MBS service. The network device can send the reception configuration information of the MBS service to the terminal through terminal-specific signaling.

[0318] In transmission mode 2 (broadcast transmission), the terminal can receive the reception configuration information of the MBS service and receive the MBS service in the RRC idle state, RRC inactive state, or RRC connected state. The network device can send the reception configuration information to the terminal through system information (e.g., SIB) and MBS control channel information (e.g., MCCH).

[0319] For terminals in the RRC connected state, they can flip based on the NDI indication in the DCI to determine whether the received service data is new data or retransmission data. For terminals in the RRC non-connected state, during the cell reselection process, the terminal may miss the initial NDI indication, resulting in inconsistent understanding of whether the service data is new data or retransmission data between the terminal and the network equipment when flipping based on the NDI, which in turn leads to combined decoding errors and poor service data transmission reliability.

[0320] The present disclosure proposes a method for determining whether service data is newly transmitted data or retransmitted data when a terminal receives service data in an RRC non-connected state.

[0321] First, when the terminal reselects a new cell, such as the first cell, in response to receiving service data, such as multicast service data, transmitted by the network device of the first cell for the first time, the terminal determines the service data as new transmission data.

[0322] Based on the above description, if the DCI sent by the network device carries NDI, the terminal stores the NDI. During the subsequent data transmission process, it determines whether the new service data is new transmission data or retransmission data based on the stored NDI and the new NDI.

[0323] Based on the above description, the terminal determines that the service data received for the first time is new transmission data, including at least one of the following:

[0324] Initialize NDI;

[0325] Clear the HARQ buffer associated with the service.

[0326] The terminal may determine, based on the scheduling indication information sent by the network device, that it is the first time that the terminal receives the service data transmitted by the network device.

[0327] Based on the above description, initializing NDI includes at least one of the following operations:

[0328] 1. Ignore the NDI indication in the DCI and consider the NDI to have been toggled;

[0329] In embodiment 1, the terminal reselects to the first cell, and in response to receiving service data transmitted by the network device of the first cell for the first time, such as multicast service data, the terminal regards the NDI as a flip, and determines the service data transmitted this time as new data (regardless of what the NDI carried by the DCI indicates, the terminal ignores the NDI indication).

[0330] 2. Delete the historical NDI stored in the terminal;

[0331] In embodiment 2, the terminal reselects the first cell, deletes the stored historical NDI, and in response to the first reception of service data transmitted by the network device of the first cell, such as multicast service data, since the historical NDI has been deleted, the terminal determines that the network side has not indicated NDI, and then determines the service data received for the first time as new transmission data.

[0332] Based on the above description, the terminal may be a terminal that joins a multicast service session and / or a terminal that is configured to receive service data in an RRC non-connected state.

[0333] Based on the above description, the above-mentioned first cell is a cell that supports the terminal to receive service data in the RRC non-connected state.

[0334] In the above embodiment, after the terminal reselects to the first cell, the service data first received from the network device of the first cell can be determined as newly transmitted data. This ensures that the network device and the terminal have consistent understanding of newly transmitted or retransmitted data, avoids combined decoding errors, and improves the reliability of service data transmission.

[0335] 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 device, etc.) in any of the above methods.

[0336] 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), which realizes the functions of some or all of the above units or modules 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.

[0337] 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 the 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 and implementing 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 an ASIC, such as a neural network processing unit (NPU), a tensor processing unit (TPU), a deep learning processing unit (DPU), etc.

[0338] FIG4A is a schematic diagram of the structure of a terminal according to an embodiment of the present disclosure. As shown in FIG4A , a terminal 4100 may include: a processing module 4101 .

[0339] In some embodiments, the processing module 4101 is configured to, after reselecting to the first cell, determine the service data transmitted by the network device of the first cell received for the first time by the terminal as the new transmission data.

[0340] In some embodiments, the terminal 4100 may include a transceiver module 4102 (not shown in FIG. 4A ), which is configured to receive an NDI sent by a network device, and receive business data transmitted by the network device, etc.

[0341] Optionally, the processing module 4101 is used to execute at least one of the other steps (such as step S2104, step S2105, step S2202, but not limited thereto) performed by the terminal 101 in any of the above methods, which will not be repeated here.

[0342] Optionally, the above-mentioned processing module 4102 is used to execute at least one of the communication steps such as sending and / or receiving performed by the terminal 5100 in any of the above methods (for example, step S2101, step S2102, step S2103, step S2201, but not limited to these), which will not be repeated here.

[0343] FIG4B is a schematic diagram of the structure of a network device according to an embodiment of the present disclosure. As shown in FIG5B , a network device 4200 may include a transceiver module 4201 .

[0344] In some embodiments, the transceiver module 4201 is configured to transmit service data to the terminal, so that after the terminal reselects the first cell, it determines the service data transmitted by the network device of the first cell for the first time as new transmission data.

[0345] Optionally, the above-mentioned transceiver module 4201 is used to execute at least one of the communication steps such as sending and / or receiving that can be executed by the network device 5200 in any of the above methods (for example, step S2101, step S2102, step S2103, step S2201, but not limited to these), which will not be repeated here.

[0346] 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.

[0347] 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.

[0348] Figure 5A is a schematic diagram of the structure of a communication device 5100 proposed in an embodiment of the present disclosure. Communication device 5100 can be a network device (e.g., a core network device, an access network device, etc.), a terminal (e.g., a user equipment, etc.), a chip, a chip system, or a processor that supports a core network device in implementing any of the above methods, or a chip, a chip system, or a processor that supports a terminal in implementing any of the above methods. Communication device 5100 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.

[0349] As shown in Figure 5A, the communication device 5100 includes one or more processors 5101. The processor 5101 can be a general-purpose processor or a dedicated processor, for example, a baseband processor or a central processing unit. The baseband processor can be used to process communication protocols and communication data, and the central processing unit can be used to control the communication device (such as a base station, a baseband chip, a terminal device, a terminal device chip, a DU or a CU, etc.), execute programs, and process program data. The communication device 5100 is used to perform any of the above methods.

[0350] In some embodiments, the communication device 5100 further includes one or more memories 5102 for storing instructions. Optionally, all or part of the memories 5102 may be located outside the communication device 5100.

[0351] In some embodiments, the communication device 5100 further includes one or more transceivers 5103. When the communication device 5100 includes one or more transceivers 5103, the transceiver 5103 performs at least one of the communication steps such as sending and / or receiving in the above method (for example, step S2101, step S2102, step S2103, step S2201, but not limited thereto), and the processor 5101 performs at least one of the other steps (for example, step S2104, step S2105, step S2202, but not limited thereto).

[0352] 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.

[0353] In some embodiments, the communication device 5100 may include one or more interface circuits 5104. Optionally, the interface circuit 5104 is connected to the memory 5102. The interface circuit 5104 may be configured to receive signals from the memory 5102 or other devices, and may be configured to send signals to the memory 5102 or other devices. For example, the interface circuit 5104 may read instructions stored in the memory 5102 and send the instructions to the processor 5101.

[0354] The communication device 5100 described in the above embodiments may be a network device or a terminal, but the scope of the communication device 5100 described in the present disclosure is not limited thereto, and the structure of the communication device 5100 may not be limited to FIG. 5A. 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, a terminal device, an intelligent terminal device, a cellular phone, a wireless device, a handheld device, a mobile unit, an in-vehicle device, a network device, a cloud device, an artificial intelligence device, etc.; (6) others, etc.

[0355] 5B is a schematic diagram of the structure of a chip 5200 according to an embodiment of the present disclosure. If the communication device 5200 can be a chip or a chip system, please refer to the schematic diagram of the structure of the chip 5200 shown in FIG5B , but the present disclosure is not limited thereto.

[0356] The chip 5200 includes one or more processors 5201 , and the chip 5200 is configured to execute any of the above methods.

[0357] In some embodiments, the chip 5200 further includes one or more interface circuits 5202. Optionally, the interface circuit 5202 is connected to the memory 5203. The interface circuit 5202 can be used to receive signals from the memory 5203 or other devices, and can be used to send signals to the memory 5203 or other devices. For example, the interface circuit 5202 can read instructions stored in the memory 5203 and send the instructions to the processor 5201.

[0358] In some embodiments, the interface circuit 5202 executes at least one of the communication steps such as sending and / or receiving in the above method (for example, step S2101, step S2102, step S2103, step S2201, but not limited to these), and the processor 5201 executes at least one of the other steps (for example, step S2104, step S2105, step S2202, but not limited to these).

[0359] In some embodiments, terms such as interface circuit, interface, transceiver pin, and transceiver may be used interchangeably.

[0360] In some embodiments, the chip 5200 further includes one or more memories 5203 for storing instructions. Alternatively, all or part of the memories 5203 may be located outside the chip 5200.

[0361] The present disclosure also proposes a storage medium having instructions stored thereon, which, when executed on the communication device 5100, causes the communication device 5100 to execute 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 transient storage medium.

[0362] The present disclosure also provides a program product, which, when executed by the communication device 5100, enables the communication device 5100 to perform any of the above methods. Optionally, the program product is a computer program product.

[0363] The present disclosure also provides a computer program that, when executed on a computer, causes the computer to perform any of the above methods. Other embodiments of the present disclosure will be readily apparent to those skilled in the art after considering the specification and practicing the invention disclosed herein.

[0364] This disclosure is intended to cover any variations, uses, or adaptations of the present disclosure that follow the general principles of the present disclosure and include common knowledge or customary techniques in the art not disclosed herein. The specification and examples are to be considered as exemplary only, with the true scope and spirit of the present disclosure being indicated by the following claims.

[0365] It should be understood that the present disclosure is not limited to the exact structures that have been described above and shown in the drawings, and that various modifications and changes can be made without departing from the scope thereof. The scope of the present disclosure is limited only by the appended claims.

Claims

1. An information transmission method, characterized in that: include: After reselecting the first cell, the terminal determines the service data transmitted by the network device of the first cell for the first time as new transmission data.

2. The method according to claim 1, characterized in that: The method further comprises: receiving a first new data indicator NDI sent by the network device of the first cell, where the first NDI is associated with the service data transmitted by the network device of the first cell; The first NDI is stored.

3. The method according to claim 2, characterized in that The method further comprises: receiving a second NDI sent by the network device of the first cell, where the second NDI is associated with new service data transmitted by the network device of the first cell; Based on the first NDI and the second NDI, the new service data transmitted by the network device of the first cell is determined as new transmission data or retransmission data.

4. The method according to any one of claims 1 to 3, characterized in that: The method further comprises: Based on the scheduling indication information sent by the network device of the first cell, it is determined that the service data transmitted by the network device of the first cell is received for the first time.

5. The method according to any one of claims 2 to 4, characterized in that: The determining that the service data transmitted by the network device of the first cell and received for the first time is the new transmission data includes any one of the following: Initializing a first NDI, where the first NDI is associated with the service data transmitted by the network device of the first cell; Clear the hybrid automatic repeat request HARQ buffer associated with the service.

6. The method according to claim 5, characterized in that Initializing the first NDI includes at least one of the following: Determine that the first NDI is flipped; Delete a third NDI, where the third NDI is a historical NDI stored before the terminal reselects to the first cell.

7. The method according to any one of claims 1 to 6, characterized in that: The terminal is at least one of the following: Terminals that have joined the service session; A terminal that supports receiving the service data in a radio resource control RRC non-connected state.

8. The method according to any one of claims 1 to 7, characterized in that: The first cell is a cell that supports the terminal to receive the service data in an RRC non-connected state.

9. The method according to any one of claims 1 to 8, characterized in that: The services include multicast services.

10. An information transmission method, characterized in that: include: The service data is transmitted to the terminal, so that after the terminal reselects the first cell, the service data transmitted by the network device of the first cell for the first time is determined as the new transmission data.

11. The method according to claim 10, characterized in that The method further comprises: A first new data indicator NDI is sent to the terminal so that the terminal stores the first NDI, where the first NDI is associated with the service data transmitted by the network device of the first cell.

12. The method according to claim 10, characterized in that The method further comprises: A second NDI is sent to the terminal, where the second NDI is associated with new service data transmitted by the network device of the first cell, so that the terminal determines the new service data as new transmission data or retransmission data based on the first NDI and the second NDI.

13. The method according to any one of claims 10 to 12, characterized in that: The method further comprises: Scheduling indication information is sent to the terminal, where the scheduling indication information is used by the terminal to determine that the service data transmitted by the network device of the first cell is received for the first time.

14. The method according to any one of claims 10 to 13, characterized in that: The terminal is at least one of the following: Terminals that have joined the service session; A terminal that supports receiving the service data in a radio resource control RRC non-connected state.

15. The method according to any one of claims 10 to 14, characterized in that: The first cell is a cell that supports the terminal to receive service data in an RRC non-connected state.

16. The method according to any one of claims 10 to 15, characterized in that: The services include multicast services.

17. A terminal, characterized in that: include: The processing module is configured to, after reselecting to the first cell, determine, by the terminal, service data transmitted by the network device of the first cell that is first received as new transmission data.

18. A network device, characterized in that: include: The transceiver module is configured to transmit service data to the terminal, so that after the terminal reselects the first cell, the service data transmitted by the network device of the first cell that is first received is determined as new transmission data.

19. A terminal, characterized in that: include: one or more processors; The terminal is used to execute the information transmission method according to any one of claims 1 to 9.

20. A network device, characterized in that: include: one or more processors; Wherein, the network device is used to execute the method for information transmission behavior described in any one of claims 10-16.

21. A communication system, characterized in that: It comprises a terminal and a network device, wherein the terminal is configured to implement the information transmission method according to any one of claims 1 to 9, and the network device is configured to implement the information transmission method according to any one of claims 10 to 16.

22. A storage medium storing instructions, characterized in that: When the instruction is executed on the communication device, the communication device executes the information transmission method according to any one of claims 1-9 or 10-16.

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