Indication determination, information setting method and apparatus, communication apparatus, and storage medium

Abstract

The present disclosure relates to indication determination, information setting method and device, communication device and storage medium, wherein the indication determination method comprises: acquiring a first new data indicator (NDI) in a first downlink control information (DCI) sent by a network side device, wherein the first DCI is scrambled by a first radio network temporary identifier (RNTI); acquiring a second DCI received last time before the first DCI, wherein a second RNTI scrambling the second DCI is the same as the first RNTI; and determining information indicated by the first NDI according to a relationship between a second NDI in the second DCI and the first NDI. According to the present disclosure, according to an embodiment of the present disclosure, a terminal can find a second DCI in a DCI before a first DCI, and it is necessary to ensure that the found second DCI satisfies that a second RNTI scrambling the second DCI is the same as a first RNTI scrambling the first DCI, and then according to a relationship between a second NDI in the second DCI and the first NDI, information indicated by the first NDI is accurately determined.

Description

TECHNICAL FIELD

[0001] The present disclosure relates to the technical field of communication, and in particular, to an indication determination method, an information setting method, an indication determination apparatus, an information setting apparatus, a communication apparatus, and a computer readable storage medium. BACKGROUND

[0002] In the process of communication between the network side and the terminal, the network side can send a downlink control information (DCI) to the terminal, and schedule the transmitted information through the DCI.

[0003] The DCI carries a new data indication (NDI), and the terminal can determine whether the information scheduled by the DCI is a new transmission or a retransmission according to the relationship between the value of the NDI and the value of the NDI in the previous DCI.

[0004] However, in some cases, the comparison between the NDI in the DCI and the NDI in the previous DCI will result in an error in determining whether the information scheduled is a new transmission or a retransmission. SUMMARY

[0005] Therefore, embodiments of the present disclosure propose an indication determination method, an information setting method, an indication determination apparatus, an information setting apparatus, a communication apparatus, and a computer readable storage medium to solve the technical problems in the related art.

[0006] According to a first aspect of embodiments of the present disclosure, an indication determination method is provided, which is performed by a terminal, and the method comprises: obtaining a first new data indication (NDI) in a first downlink control information (DCI) sent by a network side device, wherein the first DCI is scrambled by a first radio network temporary identifier (RNTI); obtaining a second DCI received most recently before the first DCI, wherein a second RNTI used to scramble the second DCI is the same as the first RNTI; and determining information indicated by the first NDI according to a relationship between a second NDI in the second DCI and the first NDI.

[0007] According to a second aspect of embodiments of the present disclosure, an information setting method is provided, which is performed by a network side device, and the method comprises: sending a first downlink control information (DCI) to a terminal, wherein the first DCI is scrambled by a first radio network temporary identifier (RNTI); obtaining a second DCI sent most recently to the terminal before the first DCI, wherein a second RNTI used to scramble the second DCI is the same as the first RNTI; and setting a first NDI in the first DCI according to a second NDI in the second DCI.

[0008] According to a third aspect of the present disclosure, an indication determination apparatus is provided, applicable to a terminal. The apparatus includes: a processing module configured to acquire a first new data identifier (NDI) in a first downlink control information (DCI) sent by a network-side device, wherein the first DCI is scrambled by a first radio network temporary identifier (RNTI); acquire a second DCI most recently received before the first DCI, wherein the second RNTI scrambled in the second DCI is the same as the first RNTI; and determine information indicating the first NDI based on the relationship between the second NDI in the second DCI and the first NDI.

[0009] According to a fourth aspect of the present disclosure, an information setting apparatus is provided, applicable to a network-side device. The apparatus includes: a sending module configured to send a first downlink control information (DCI) to a terminal, wherein the first DCI is scrambled using a first radio network temporary identifier (RNTI); a processing module configured to obtain a second DCI most recently sent to the terminal before the first DCI, wherein the second RNTI scrambled in the second DCI is the same as the first RNTI; and to set a first NDI in the first DCI according to a second NDI in the second DCI.

[0010] According to a fifth aspect of the present disclosure, a communication device is provided, comprising: a processor; a memory for storing a computer program; wherein, when the computer program is executed by the processor, the above-described instruction determination method is implemented.

[0011] According to a sixth aspect of the present disclosure, a communication device is provided, comprising: a processor; a memory for storing a computer program; wherein, when the computer program is executed by the processor, the above-described information setting method is implemented.

[0012] According to a seventh aspect of the present disclosure, a computer-readable storage medium is provided for storing a computer program that, when executed by a processor, implements the steps in the above-described instruction determination method.

[0013] According to an eighth aspect of the present disclosure, a computer-readable storage medium is provided for storing a computer program that, when executed by a processor, implements the steps in the above-described information setting method.

[0014] According to an embodiment of this disclosure, after receiving a first DCI sent by the network side, the terminal can determine a first NDI therein and a first RNTI that scrambles the first DCI.

[0015] Furthermore, the terminal can choose not to search for the DCI preceding the first DCI, but instead search for the second DCI among the DCIs preceding the first DCI. It needs to ensure that the found second DCI satisfies the condition that the second RNTI of the scrambled second DCI is the same as the first RNTI of the scrambled first DCI. Here, "the second RNTI is the same as the first RNTI" can mean that the second RNTI and the first RNTI have the same type, such as both being C-RNTI or both being G-RNTI, or it can mean that the second RNTI and the first RNTI have the same value.

[0016] Finally, based on the relationship between the second NDI and the first NDI in the second DCI, the information indicated by the first NDI can be determined, that is, whether the first NDI is used to indicate a new transmission or a retransmission. This allows for an accurate determination of the information indicated by the first NDI. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this disclosure, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this disclosure. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic flowchart illustrating an instruction determination method according to an embodiment of the present disclosure.

[0019] Figure 2 This is a schematic diagram illustrating how to define the meaning of NDI in related technologies.

[0020] Figure 3 This is a schematic diagram illustrating the determination of the meaning of NDI according to an embodiment of the present disclosure.

[0021] Figure 4 This is a schematic flowchart illustrating another instruction determination method according to embodiments of the present disclosure.

[0022] Figure 5 This is a schematic flowchart illustrating another instruction determination method according to embodiments of the present disclosure.

[0023] Figure 6 This is a schematic flowchart illustrating an information setting method according to an embodiment of the present disclosure.

[0024] Figure 7 This is a schematic flowchart illustrating another information setting method according to an embodiment of the present disclosure.

[0025] Figure 8 This is a schematic flowchart illustrating another information setting method according to an embodiment of the present disclosure.

[0026] Figure 9 This is a schematic diagram illustrating the determination of the meaning of NDI according to an embodiment of the present disclosure.

[0027] Figure 10 This is a schematic diagram illustrating another way of determining the meaning of NDI according to an embodiment of the present disclosure.

[0028] Figure 11 This is a schematic block diagram illustrating an indication determining device according to an embodiment of the present disclosure.

[0029] Figure 12 This is a schematic block diagram illustrating an information setting device according to an embodiment of the present disclosure.

[0030] Figure 13 This is a schematic block diagram illustrating an apparatus for setting information according to an embodiment of the present disclosure.

[0031] Figure 14 This is a schematic block diagram illustrating an apparatus for indicating determination according to an embodiment of the present disclosure. Detailed Implementation

[0032] The technical solutions of the embodiments of this disclosure will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this disclosure, and not all embodiments. Based on the embodiments of this disclosure, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this disclosure.

[0033] The terminology used in this disclosure is for the purpose of describing particular embodiments only and is not intended to be limiting of the present disclosure. The singular forms “a” and “the” as used in this disclosure and the appended claims are also 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 includes any and all possible combinations of one or more of the associated listed items.

[0034] It should be understood that although the terms first, second, third, etc., may be used to describe various information in embodiments of this disclosure, such information should not be limited to these terms. These terms are only used to distinguish information of the same type from one another. For example, first information may also be referred to as second information without departing from the scope of embodiments of this disclosure, and similarly, second information may also be referred to as first information. Depending on the context, the word "if" as used herein may be interpreted as "when," "when," or "in response to a determination."

[0035] For the sake of brevity and ease of understanding, this document uses the terms "greater than" or "less than", "higher than" or "lower than" to describe size relationships. However, it will be understood by those skilled in the art that the term "greater than" also includes the meaning of "greater than or equal to", and "less than" also includes the meaning of "less than or equal to"; the term "higher than" also includes the meaning of "higher than or equal to", and "lower than" also includes the meaning of "lower than or equal to".

[0036] Figure 1 This is a schematic flowchart illustrating an instruction determination method according to an embodiment of the present disclosure. The instruction determination method shown in this embodiment can be executed by a terminal, which includes, but is not limited to, mobile phones, tablets, wearable devices, sensors, and Internet of Things (IoT) devices (such as NB-IoT (Narrow Band Internet of Things), MTC (Machine Type Communication), and eMTC (Enhance Machine Type Communication)). The terminal can communicate with network-side devices, which include, but are not limited to, network-side devices in 4G, 5G, and 6G communication systems, such as base stations and core networks.

[0037] like Figure 1 As shown, the indication determination method may include the following steps:

[0038] In step S101, the first new data identifier (NDI) in the first downlink control information (DCI) sent by the network-side device is obtained, wherein the first DCI is scrambled by the first radio network temporary identifier (RNTI).

[0039] In step S102, the most recently received second DCI before the first DCI is obtained, wherein the second RNTI of the scrambled second DCI is the same as the first RNTI;

[0040] In step S103, the information indicated by the first NDI is determined based on the relationship between the second NDI and the first NDI in the second DCI.

[0041] In one embodiment, the communication modes supported by the terminal include, but are not limited to, point-to-multiple (PTM) mode and point-to-point (PPT) mode.

[0042] When communicating via PTM mode, such as when communicating in PTM mode (scheme 1), it can receive multicast (including broadcast and multicast) DCI sent by the network side, which is used to schedule the transmission of multicast information. For example, it can schedule the Multicast Broadcast Service Physical Downlink Shared Channel (MBS PDSCH).

[0043] In particular, the DCI received in PTM mode 1 via scheduled MBS PDSCH can be scrambled using G-RNTI (Group Radio Network Temporary Identity). It should be noted that the scrambling of the DCI in all embodiments of this disclosure can refer to the scrambling of the DCI's Cyclical Redundancy Check (CRC) sequence.

[0044] When communicating via PTP mode, the terminal can send unicast DCI to schedule MBS PDSCH. The DCI can be scrambled using C-RNTI (Cell Radio Network Temporary Identity), while the scheduled MBS PDSCH can be scrambled using G-RNTI. In PTP mode, the terminal can also send unicast DCI to schedule retransmissions of MBS PDSCH; the DCI used for retransmission scheduling is scrambled using C-RNTI.

[0045] In addition, the terminal can also support scheduling unicast services via unicast DCI.

[0046] Figure 2 This is a schematic diagram illustrating how to define the meaning of NDI in related technologies.

[0047] like Figure 2 As shown, for terminal 1, during the multicast service phase, the network side and terminal 1 first communicate based on PTM mode 1. The network side device sends multicast DCI#1 to the terminal to schedule new transmissions of MBS PDSCH. The value of NDI in DCI#1 is 1.

[0048] After successfully receiving (e.g., receiving and successfully decoding), terminal 1 sends a Hybrid Automatic Repeat reQuest (HARQ) ACK to the network side.

[0049] After receiving HARQ-ACK, the network side can determine that terminal 1 has successfully received the new transmission of MBS PDSCH. Next, during the multicast service phase, it can send multicast DCI#2 to the terminal based on PTM mode 1 to schedule another new transmission of MBS PDSCH. The value of NDI in DCI#2 is 0.

[0050] After receiving DCI#2, terminal 1 can determine that the previous DCI of DCI#2 is DCI#1. Then, it compares the NDI in DCI#1 with the NDI in DCI#2 and determines that they are different. Thus, it determines that the information indicated by the NDI in DCI#2 is the new transmission (the data scheduled by the DCI where the NDI is located is the new transmission).

[0051] For terminal 2, during the multicast service phase, the network side and terminal 2 first communicate based on PTM mode 1. The network side device sends multicast DCI#1 to the terminal (for example, terminal 1 and terminal 2 belong to the same group (e.g., MBS group), so they can receive the same multicast DCI) to schedule new transmissions of MBS PDSCH. The value of NDI in DCI#1 is 1.

[0052] Terminal 2 failed and sent a Hybrid Automatic Repeat Request (HARQ-NACK) to the network side to confirm the failure.

[0053] After receiving HARQ-NACK, the network side can determine that terminal 2 failed to successfully receive the new transmission of MBS PDSCH. Next, communication can be carried out in PTP mode. For example, in PTP mode, DCI#3 is sent to the terminal to schedule the retransmission of MBS PDSCH (meaning retransmission, not repetition). The value of NDI in DCI#3 is still 1, indicating retransmission (indicating that the data scheduled by the DCI where NDI is located is retransmission).

[0054] After successfully receiving the message, terminal 2 sends a HARQ-ACK to the network side.

[0055] Next, the network side performs unicast service with terminal 2, sending DCI#4 to terminal 2 to schedule the new transmission of unicastPDSCH. The NDI in DCI#4 is 0.

[0056] After successfully receiving the message, terminal 2 sends a HARQ-ACK to the network side.

[0057] Next, the network side communicates with terminal 2 via multicast service based on PTM mode 1, and sends multicast DCI#2 to the terminal to schedule a new transmission of another MBS PDSCH. The value of NDI in DCI#2 is 0.

[0058] After receiving DCI#2, terminal 2 determines that the preceding DCI is DCI#4. It then compares the NDI in DCI#1 with the NDI in DCI#4, confirming they are the same, and thus determines that the NDI in DCI#2 indicates a retransmission. However, the NDI in DCI#2 indicates a new transmission, so terminal 2 makes an error in its interpretation of the NDI information in DCI#2.

[0059] Figure 3 This is a schematic diagram illustrating the determination of the meaning of NDI according to an embodiment of the present disclosure.

[0060] According to embodiments of this disclosure, after receiving the first DCI sent by the network side, the terminal can determine the first NDI therein and the first RNTI that scrambles the first DCI.

[0061] Furthermore, the terminal can choose not to search for the DCI preceding the first DCI, but instead search for the second DCI among the DCIs preceding the first DCI. It needs to ensure that the found second DCI satisfies the condition that the second RNTI of the scrambled second DCI is the same as the first RNTI of the scrambled first DCI. Here, "the second RNTI is the same as the first RNTI" can mean that the second RNTI and the first RNTI have the same type, such as both being C-RNTI or both being G-RNTI, or it can mean that the second RNTI and the first RNTI have the same value.

[0062] Finally, based on the relationship between the second NDI and the first NDI in the second DCI, the information indicated by the first NDI can be determined, that is, whether the first NDI is used to indicate a new transmission or a retransmission. This allows for an accurate determination of the information indicated by the first NDI.

[0063] like Figure 3 As shown, for example, still using Figure 2 Taking terminal 2 as an example, according to the embodiments of this disclosure, after receiving DCI#2, terminal 2 will not determine the information indicated by NDI in DCI#2 based on the relationship between NDI in DCI#4 and NDI in DCI#2, but can determine the RNTI of scrambled DCI#2.

[0064] Since DCI#2 is sent during communication between the network side and the terminal based on PTM mode 1, the RNTI scrambled with DCI#2 is G-RNTI. The DCI scrambled with G-RNTI before DCI#2 is DCI#1. Therefore, the terminal can determine the information indicated by the NDI in DCI#2 based on the relationship between the NDI in DCI#1 and the NDI in DCI#2. Since the NDI in DCI#1 is 1 and the NDI in DCI#2 is 0, they are different, thus determining that the NDI in DCI#2 is used to indicate a new transmission, that is, to indicate that the MBS PDSCH scheduled by the DCI is a new transmission. Therefore, according to this embodiment, the terminal 2 accurately determines the information indicated by the NDI in DCI#2.

[0065] In one embodiment, determining the information indicating the first NDI based on the relationship between the second NDI and the first NDI in the second DCI includes:

[0066] In response to the fact that the second NDI is different from the first NDI, it is determined that the first NDI is used to indicate a new transmission;

[0067] In response to the fact that the second NDI is the same as the first NDI, it is determined that the first NDI is used to indicate retransmission.

[0068] The second NDI is different from the first NDI, and can also be described as the second NDI being flipped relative to the first NDI. For example, when the second NDI is 1, the first NDI is 0, or when the second NDI is 0, the first NDI is 1. It can be determined that the first NDI is flipped relative to the second NDI, thereby determining that the information indicated by the first NDI is a new transmission.

[0069] The second NDI is the same as the first NDI, or it can be described as the second NDI not being flipped relative to the first NDI. For example, when the second NDI is 1, the first NDI is 1, or when the second NDI is 0, the first NDI is 0. It can be determined that the first NDI is not flipped relative to the second NDI, thereby determining that the information indicated by the first NDI is a retransmission.

[0070] In one embodiment, the Hybrid Automatic Repeat Request Process ID (HARQ processID) in the second DCI is the same as the HARQ process ID in the first DCI.

[0071] In one embodiment, the DCI may carry a HARQ process ID. When the terminal determines the information indicated by the first NDI in the first DCI, it will search for the second DCI among the DCIs that carry the same HARQ process ID as the first DCI, and will not search for the second DCI among the DCIs that carry a different HARQ process ID than the first DCI. Therefore, it can be ensured that the data scheduled by the found second DCI belongs to the same HARQ process as the data scheduled by the first DCI, thereby ensuring that both the first and second NDIs indicate new transmissions or retransmissions for the HARQ process, avoiding errors that may occur when determining the NDI indication information across HARQ processes.

[0072] In one embodiment, the first DCI and the second DCI are at least one of the DCIs used for the following purposes:

[0073] DCI used for scheduling the physical downlink shared channel (unicast PDSCH) for unicast services;

[0074] DCI used for scheduling new transmissions of the Physical Downlink Shared Channel (MBS PDSCH) for multicast services;

[0075] The DCI is used to schedule retransmissions of the Physical Downlink Shared Channel (MBS) PDSCH for multicast services.

[0076] Unicast PDSCH refers to a PDSCH scheduled via UE-specific DCI (User Equipment-Specific Downlink Control Information) and scrambled by UE-specific RNTI (User Equipment-Specific RNTI), which can only be received by a specific terminal. For example... Figure 3 In the embodiment shown, the network side sends DCI#4 to the terminal during the unicast service phase.

[0077] MBS PDSCH refers to a PDSCH scheduled via group common downlink control information (DCI), scrambled to the associated RNTI by terminals within the same group, and thus receivable by terminals belonging to the same group. For example... Figure 3 In the illustrated embodiment, the network side sends DCI#1 and DCI#2 to the terminal during the multicast service phase.

[0078] In one embodiment, the DCI used to schedule unicast PDSCH is scrambled via C-RNTI;

[0079] The DCI used for scheduling new MBS PDSCH transmissions is scrambled via G-RNTI;

[0080] The DCI used to schedule MBS PDSCH retransmissions is scrambled via C-RNTI.

[0081] For example Figure 3 In the illustrated embodiment, DCI#4 is used to schedule unicast PDSCH and is scrambled using C-RNTI; DCI#1 is used to schedule new MBS PDSCH transmissions in PTM mode 1 and is scrambled using G-RNTI; DCI#3 is used to schedule MBSPDSCH retransmissions in PTM mode and is scrambled using G-RNTI.

[0082] Figure 4 This is a schematic flowchart illustrating another instruction determination method according to embodiments of the present disclosure. Figure 4 As shown, obtaining the most recently received second DCI before the first DCI includes:

[0083] In step S401, the RNTI that scrambles the DCI of the scheduled point-to-point PTP mode MBS PDSCH retransmission is taken as the G-RNTI, and the second DCI most recently received before the first DCI is obtained.

[0084] In one embodiment, when a DCI is available for scheduling MBS PDSCH retransmissions in PTP mode, the DCI is scrambled using C-RNTI, but the DCI for scheduling MBS PDSCH in other modes (e.g., PTM mode 1) is generally scrambled using G-RNTI.

[0085] Still with Figure 3 Taking the illustrated embodiment as an example, in order to determine the information indicated by NDI in DCI#2, since DCI#2 is scrambled by G-RNTI, DCI#1 is also scrambled by G-RNTI, and DCI#2 and DCI#3 are scrambled by C-RNTI, the terminal will find DCI#1 and determine the information indicated by NDI in DCI#2 based on the relationship between NDI in DCI#1 and NDI in DCI#2.

[0086] In this case, both DCI#2 and DCI#4 are used to schedule MBS PDSCH, but DCI#2 is used to schedule MBS PDSCH retransmission in PTP mode. Therefore, in order to determine the information indicated by NDI in DCI#2, it can also be determined based on the relationship between NDI in DCI#2 and NDI in DCI#4. However, the RNTI of scrambled DCI#2 is different from that of scrambled DCI#4.

[0087] According to this embodiment, the RNTI scrambled with the DCI retransmitted in the point-to-point PTP mode MBS PDSCH can be used as the G-RNTI, and then the second DCI most recently received before the first DCI can be obtained. For example, it can be... Figure 3 In the illustrated embodiment, the C-RNTI of scrambled DCI#2 is taken as G-RNTI. Since the RNTI of scrambled DCI#4 is G-RNTI, the most recent DCI scrambled by G-RNTI before DCI#4 can be determined, thereby determining the second DCI as DCI#2.

[0088] according to Figure 3 It can be seen that in the time domain, DCI#4 to DCI#2 is closer than DCI#1 to DCI#2, which is beneficial for the terminal to determine the second DCI more quickly.

[0089] Then, based on the relationship between the NDI in DCI#4 and the NDI in DCI#2, the information indicated by the NDI in DCI#2 is determined. Since the NDI in DCI#4 is 1 and the NDI in DCI#2 is 0, it can be determined that the NDI in DCI#2 is used to indicate new transmission.

[0090] In one embodiment, the step of using the scrambled RNTI of the DCI retransmitted in the point-to-point PTP mode MBS PDSCH as the G-RNTI to obtain the most recently received second DCI before the first DCI includes:

[0091] In response to the successful reception of an MBS PDSCH retransmission scheduled by the DCI used for scheduling MBS PDSCH retransmission in PTP mode, the scrambled RNTI of the DCI used for scheduling MBS PDSCH retransmission in PTP mode is taken as the G-RNTI, and the second DCI most recently received before the first DCI is obtained.

[0092] In one embodiment, since the terminal may fail to receive MBS PDSCH retransmissions in DCI-scheduled PTP mode (e.g., not receiving or failing to decode after receiving), the terminal will send HARQ-NACK to the network side. The network side determines that the terminal has failed to receive MBS PDSCH retransmissions based on the HARQ-NACK sent by the terminal, and can retransmit MBS PDSCH retransmissions in DCI-scheduled PTP mode.

[0093] In this case, if the RNTI that scrambles the DCI of the MBS PDSCH retransmission in the PTP mode is treated as the G-RNTI, it is possible that only the DCI of the MBS PDSCH retransmission in the PTP mode that has already been received will be considered, without considering the DCI of the MBS PDSCH retransmission in the PTP mode that continues to be sent by the network side.

[0094] According to this embodiment, when it is determined that the MBSPDSCH retransmission scheduled by the DCI used for scheduling MBS PDSCH retransmission in PTP mode has been successfully received, the RNTI that scrambled the DCI used for scheduling MBS PDSCH retransmission in PTP mode can be used as the G-RNTI, thereby obtaining the second DCI that was most recently received before the first DCI.

[0095] When the MBS PDSCH retransmission scheduled by the DCI used for scheduling PTP mode MBS PDSCH retransmissions is successfully received, the terminal can send a HARQ-ACK to the network side. The network side can determine that the MBS PDSCH retransmission has been successfully received based on the HARQ-ACK sent by the terminal, and thus can stop sending DCIs used for scheduling that MBS PDSCH retransmission. Furthermore, the terminal can treat the scrambled RNTI of the DCI used for scheduling PTP mode MBS PDSCH retransmissions as a G-RNTI. This allows the terminal to treat the scrambled RNTI as a G-RNTI for each DCI sent by the network side for scheduling PTP mode MBS PDSCH retransmissions, avoiding the situation where RNTIs of individual scrambled DCIs are not scrambled as G-RNTIs.

[0096] Figure 5 This is a schematic flowchart illustrating yet another instruction determination method according to embodiments of the present disclosure. Figure 5 As shown, obtaining the most recently received second DCI before the first DCI includes:

[0097] In step S501, in response to the existence of a DCI for scheduling MBS PDSCH retransmission in PTP mode, a DCI for scheduling MBS PDSCH new transmission is determined, the RNTI scrambled on the DCI for scheduling MBS PDSCH new transmission is taken as C-RNTI, and the second DCI most recently received before the first DCI is obtained.

[0098] In one embodiment, when determining the information indicated by the first NDI in the first DCI, the embodiments of this disclosure search for the most recently received second DCI scrambled with RNTI using the scrambled first DCI in the DCIs preceding the first DCI, and determine the information indicated by the first NDI based on the relationship between the second NDI and the first NDI in the second DCI. This approach may present some problems.

[0099] For example, when there is a DCI used for scheduling MBS PDSCH retransmission in PTP mode, this DCI is scrambled using C-RNTI. However, the DCI used for scheduling (e.g., PTM mode 1) MBS PDSCH retransmission is scrambled using G-RNTI. In order to determine the NDI indication information in the DCI used for scheduling MBS PDSCH retransmission in PTP mode, since the DCI used for scheduling MBS PDSCH retransmission is scrambled using G-RNTI, it is impossible to determine the NDI indication information in the DCI used for scheduling MBS PDSCH retransmission based on the relationship between the NDI in the DCI used for scheduling MBS PDSCH retransmission and the NDI in the DCI used for scheduling PTP mode MBS PDSCH retransmission.

[0100] Still with Figure 3 Taking the illustrated embodiment as an example, DCI#3 is used to schedule MBS PDSCH retransmissions in PTP mode. DCI#3 is scrambled using C-RNTI, while DCI#1, which schedules new MBS PDSCH transmissions, is scrambled using G-RNTI. When determining the NDI indication information in DCI#3, since the RNTI of scrambled DCI#3 is different from that of scrambled DCI#1, the information indicated by NDI in DCI#3 cannot be determined based on the relationship between NDI in DCI#1 and NDI in DCI#3.

[0101] According to this embodiment, when a DCI for scheduling MBS PDSCH retransmissions in PTP mode exists, the DCI for scheduling MBS PDSCH new transmissions can be determined, and then the G-RNTI of the DCI for scheduling MBS PDSCH new transmissions can be used as the C-RNTI. Therefore, when it is necessary to determine the NDI indication information in the DCI for scheduling MBS PDSCH retransmissions in PTP mode, the information can be determined based on the relationship between the NDI in the DCI for scheduling MBS PDSCH new transmissions and the NDI in the DCI for scheduling MBS PDSCH retransmissions in PTP mode.

[0102] For example, based on Figure 3In the illustrated embodiment, the G-RNTI of DCI#1 for scheduling new MBS PDSCH transmissions can be treated as the C-RNTI. When it is necessary to determine the NDI indication information in DCI#3 used for scheduling PTP mode MBS PDSCH retransmissions, since the RNTI of scrambled DCI#3 is a C-RNTI, and the RNTI of scrambled DCI#1 is also treated as a C-RNTI, the RNTI of scrambled DCI#3 is the same as the RNTI of scrambled DCI#1. Therefore, when DCI#3 is used as the first DCI, DCI#1 can be used as the second DCI. Then, based on the relationship between the NDI in DCI#1 and the NDI in DCI#3, the NDI indication information in DCI#3 can be determined. Since the NDI in DCI#1 is 1 and the NDI in DCI#3 is 1, it can be determined that the NDI in DCI#3 is used to indicate retransmission.

[0103] Figure 6 This is a schematic flowchart illustrating an information setting method according to an embodiment of the present disclosure. The information setting method shown in this embodiment can be executed by a network-side device (corresponding to the network side in the above embodiment). The network-side device can communicate with the terminal. The network-side device includes, but is not limited to, base stations in communication systems such as 4G base stations, 5G base stations, and 6G base stations. The terminal includes, but is not limited to, communication devices such as mobile phones, tablets, wearable devices, sensors, and Internet of Things devices (e.g., NB-IoT, MTC, eMTC).

[0104] like Figure 6 As shown, the information setting method may include the following steps:

[0105] In step S601, a first downlink control information (DCI) is sent to the terminal, and the first DCI is scrambled using a first radio network temporary identifier (RNTI).

[0106] In step S602, the second DCI most recently sent to the terminal before the first DCI is obtained, wherein the second RNTI scrambled by the second DCI is the same as the first RNTI;

[0107] In step S603, the first NDI in the first DCI is set according to the second NDI in the second DCI.

[0108] According to embodiments of this disclosure, when a network-side device sends a first DCI to a terminal, it can scramble the first DCI using a first RNTI. To set the first NDI in the first DCI, the network-side device can skip searching for the preceding DCI and instead query the most recently sent second DCI scrambled with the same second RNTI as the first DCI from among the DCIs sent to the terminal before the first DCI. Then, it sets the first NDI based on the second NDI in the second DCI, i.e., by setting the first NDI value, the first NDI indicates either a new transmission or a retransmission. This ensures that after the first DCI is sent to the terminal, the terminal can accurately determine the information indicated by the first NDI.

[0109] like Figure 3 As shown, for example, still using Figure 2 Taking terminal 2 as an example, when the network-side device sends DCI#2 to terminal 2, since DCI#2 is used to schedule new MBS PDSCH transmissions, it needs to set the NDI in DCI#2 to indicate the new transmission. According to the embodiments of this disclosure, the network-side device does not set the NDI in DCI#2 based on the NDI in the previous DCI, i.e., DCI#4, but can determine the RNTI of scrambling DCI#2.

[0110] Since DCI#2 is sent during communication between the network-side device and the terminal based on PTM mode 1, the RNTI scrambled with DCI#2 is G-RNTI. The DCI scrambled with G-RNTI before DCI#2 is DCI#1. Therefore, the network-side device can set the NDI in DCI#2 based on the NDI in DCI#1. For example, if the NDI in DCI#1 is 1, to ensure that the NDI in DCI#2 indicates a new transmission, the NDI in DCI#2 can be set to a different value than the NDI in DCI#1, i.e., 0. This ensures that after DCI#2 is sent to terminal 2, terminal 2 can accurately determine the information indicated by the NDI in DCI#2.

[0111] In one embodiment, setting the first NDI in the first DCI according to the second NDI in the second DCI includes:

[0112] In response to the first DCI being used to schedule new transmissions, the first NDI is set to be different from the second NDI, and the first NDI is used to indicate new transmissions;

[0113] In response to the first DCI being used to schedule retransmission, the first NDI is set to be the same as the second NDI, and the first NDI is used to indicate retransmission.

[0114] The second NDI differs from the first NDI and can also be described as the second NDI being flipped relative to the first NDI. For example, when the first DCI is used to schedule new transmissions, if the second NDI is 1, the first NDI can be set to 0, or if the second NDI is 0, the first NDI can be set to 1. Thus, after the first DCI is sent to the terminal, the terminal can determine that the first NDI is flipped relative to the second NDI, thereby determining that the information indicated by the first NDI is used to indicate new transmissions.

[0115] The second NDI is the same as the first NDI, or it can be described as the second NDI not being flipped relative to the first NDI. For example, when the first DCI is used to schedule new transmissions, if the second NDI is 1, the first NDI can be set to 1, or if the second NDI is 0, the first NDI can be set to 0. Thus, after the first DCI is sent to the terminal, the terminal can determine that the first NDI has not been flipped relative to the second NDI, thereby determining that the information indicated by the first NDI is for indicating retransmission.

[0116] In one embodiment, the Hybrid Automatic Repeat Request Process ID (HARQ processID) in the second DCI is the same as the HARQ process ID in the first DCI.

[0117] In one embodiment, the DCI may carry a HARQ process ID. When the network-side device sets the first NDI in the first DCI, it will search for the second DCI among the DCIs that carry the same HARQ process ID as the first DCI, and will not search for the second DCI among the DCIs that carry a different HARQ process ID than the first DCI. Therefore, it can be ensured that the data scheduled by the found second DCI belongs to the same HARQ process as the data scheduled by the first DCI, thereby ensuring that the first NDI and the second NDI also indicate new transmissions or retransmissions for the HARQ process, avoiding errors that may occur when determining the NDI indication information across HARQ processes.

[0118] In one embodiment, the first DCI and the second DCI are at least one of the DCIs used for the following purposes:

[0119] DCI used for scheduling the physical downlink shared channel (unicast PDSCH) for unicast services;

[0120] DCI used for scheduling new transmissions of the Physical Downlink Shared Channel (MBS PDSCH) for multicast services;

[0121] The DCI is used to schedule retransmissions of the Physical Downlink Shared Channel (MBS) PDSCH for multicast services.

[0122] Unicast PDSCH refers to a PDSCH scheduled via UE-specific DCI (User Equipment-Specific Downlink Control Information) and scrambled by UE-specific RNTI (User Equipment-Specific RNTI), which can only be received by a specific terminal. For example... Figure 3 In the embodiment shown, the network side sends DCI#4 to the terminal during the unicast service phase.

[0123] MBS PDSCH refers to a PDSCH scheduled via group common downlink control information (DCI), scrambled to the associated RNTI by terminals within the same group, and thus receivable by terminals belonging to the same group. For example... Figure 3 In the illustrated embodiment, the network side sends DCI#1 and DCI#2 to the terminal during the multicast service phase.

[0124] In one embodiment, the DCI used to schedule unicast PDSCH is scrambled via C-RNTI;

[0125] The DCI used for scheduling new MBS PDSCH transmissions is scrambled via G-RNTI;

[0126] The DCI used to schedule MBS PDSCH retransmissions is scrambled via C-RNTI.

[0127] For example Figure 3 In the illustrated embodiment, DCI#4 is used to schedule unicast PDSCH and is scrambled using C-RNTI; DCI#1 is used to schedule new MBS PDSCH transmissions in PTM mode 1 and is scrambled using G-RNTI; DCI#3 is used to schedule MBSPDSCH retransmissions in PTM mode and is scrambled using G-RNTI.

[0128] Figure 7 This is a schematic flowchart illustrating another information setting method according to embodiments of the present disclosure. Figure 7 As shown, obtaining the second DCI most recently sent to the terminal before the first DCI includes:

[0129] In step S701, the RNTI that scrambles the DCI of the scheduled point-to-point PTP mode MBS PDSCH retransmission is taken as the G-RNTI, and the second DCI most recently sent to the terminal before the first DCI is obtained.

[0130] In one embodiment, when a DCI is available for scheduling MBS PDSCH retransmissions in PTP mode, the DCI is scrambled using C-RNTI, but the DCI for scheduling MBS PDSCH in other modes (e.g., PTM mode 1) is generally scrambled using G-RNTI.

[0131] Still with Figure 3 In the example shown, in order to set the NDI indication information in DCI#2, since DCI#2 is scrambled by G-RNTI, DCI#1 is also scrambled by G-RNTI, and DCI#2 and DCI#3 are scrambled by C-RNTI, the network-side device will find DCI#1 and set the NDI in DCI#2 according to the NDI in DCI#1.

[0132] In this case, both DCI#2 and DCI#4 are used to schedule MBS PDSCH. However, DCI#2 is used to schedule MBS PDSCH retransmission in PTP mode. Therefore, the NDI in DCI#2 is actually set according to the NDI value in DCI#4. However, the RNTI of scrambled DCI#2 is different from that of scrambled DCI#4.

[0133] According to this embodiment, the RNTI scrambled with the DCI retransmitted in the point-to-point PTP mode MBS PDSCH can be used as the G-RNTI, and then the second DCI most recently received before the first DCI can be obtained. For example, it can be... Figure 3 In the illustrated embodiment, the C-RNTI of scrambled DCI#2 is taken as G-RNTI. Since the RNTI of scrambled DCI#4 is G-RNTI, the most recent DCI scrambled by G-RNTI before DCI#4 can be determined, thereby determining the second DCI as DCI#2.

[0134] according to Figure 3 It can be seen that in the time domain, DCI#4 to DCI#2 is closer than DCI#1 to DCI#2, which is beneficial for the terminal to determine the second DCI more quickly.

[0135] Then, based on the NDI settings in DCI#4 and DCI#2, and since the NDI in DCI#4 is 1, while DCI#2 is used to schedule new transmissions, the NDI in DCI#2 can be set to be flipped relative to the NDI in DCI#4, i.e., set to 0. After DCI#2 is sent to the terminal, the terminal can determine that the NDI in DCI#2 is used to indicate new transmissions.

[0136] In one embodiment, the step of using the scrambled RNTI of the DCI retransmitted in the point-to-point PTP mode MBS PDSCH as the G-RNTI to obtain the second DCI most recently sent to the terminal before the first DCI includes:

[0137] If the terminal successfully receives the MBS PDSCH retransmission scheduled by the DCI used for scheduling the MBS PDSCH retransmission in PTP mode, the RNTI scrambled by the DCI used for scheduling the MBS PDSCH retransmission in PTP mode is taken as the G-RNTI, and the second DCI most recently sent to the terminal before the first DCI is obtained.

[0138] In one embodiment, since the terminal may fail to receive MBS PDSCH retransmissions in DCI-scheduled PTP mode (e.g., not receiving or failing to decode after receiving), the terminal will send HARQ-NACK to the network side. The network side determines that the terminal has failed to receive MBS PDSCH retransmissions based on the HARQ-NACK sent by the terminal, and can retransmit MBS PDSCH retransmissions in DCI-scheduled PTP mode.

[0139] In this case, if the RNTI that scrambles the DCI of the MBS PDSCH retransmission in the scheduled PTP mode is treated as the G-RNTI, it is possible that only the DCI of the MBS PDSCH retransmission in the scheduled PTP mode that has already been sent will be considered, without considering the DCI of the MBS PDSCH retransmission in the scheduled PTP mode that will be sent.

[0140] According to this embodiment, after confirming that the MBSPDSCH retransmission scheduled by the DCI used for scheduling MBS PDSCH retransmission in PTP mode has been successfully received, the RNTI scrambled by the DCI used for scheduling MBS PDSCH retransmission in PTP mode is taken as the G-RNTI, thereby obtaining the second DCI most recently received before the first DCI.

[0141] When the MBS PDSCH retransmission scheduled by the DCI used for scheduling PTP mode MBS PDSCH retransmissions is successfully received, the terminal can send a HARQ-ACK to the network side. The network side can determine that the MBS PDSCH retransmission has been successfully received based on the HARQ-ACK sent by the terminal, and thus can stop sending DCIs used for scheduling that MBS PDSCH retransmission. Furthermore, the network side can treat the scrambled RNTI of the DCI used for scheduling PTP mode MBS PDSCH retransmissions as a G-RNTI. This ensures that for each DCI sent by the network side for scheduling PTP mode MBS PDSCH retransmissions, the scrambled RNTI is treated as a G-RNTI, avoiding the situation where RNTIs of individual scrambled DCIs are not scrambled and are treated as G-RNTIs.

[0142] Figure 8 This is a schematic flowchart illustrating yet another information setting method according to embodiments of the present disclosure. Figure 8 As shown, obtaining the most recently received second DCI before the first DCI includes:

[0143] In step S801, in response to the existence of a DCI for scheduling MBS PDSCH retransmission in PTP mode, a DCI for scheduling MBS PDSCH new transmission is determined, the RNTI scrambled on the DCI for scheduling MBS PDSCH new transmission is taken as C-RNTI, and the second DCI most recently received before the first DCI is obtained.

[0144] In one embodiment, when determining the information indicated by the first NDI in the first DCI, the embodiments of this disclosure search for the most recently received second DCI scrambled with the RNTI scrambled by the scrambled first DCI in the DCI preceding the first DCI, and set the first NDI in the first DCI according to the second NDI in the second DCI. In this case, some problems may arise.

[0145] For example, when there is a DCI for scheduling MBS PDSCH retransmission in PTP mode, and this DCI is scrambled by C-RNTI, but the DCI for scheduling (e.g., PTM mode 1) MBS PDSCH retransmission is scrambled by G-RNTI, then in order to set the NDI indication information in the DCI for scheduling MBS PDSCH retransmission in PTP mode, since the DCI for scheduling MBS PDSCH retransmission is scrambled by G-RNTI, it is not possible to set the NDI in the DCI for scheduling MBS PDSCH retransmission in PTP mode based on the NDI in the DCI for scheduling MBS PDSCH retransmission.

[0146] Still with Figure 3Taking the illustrated embodiment as an example, DCI#3 is used to schedule MBS PDSCH retransmissions in PTP mode. DCI#3 is scrambled using C-RNTI, while DCI#1, which schedules new MBS PDSCH transmissions, is scrambled using G-RNTI. When setting the NDI in DCI#3, since the RNTI of scrambled DCI#3 is different from that of scrambled DCI#1, the NDI in DCI#3 cannot be set based on the NDI in DCI#1.

[0147] According to this embodiment, when a DCI for scheduling MBS PDSCH retransmissions in PTP mode exists, the DCI for scheduling MBS PDSCH new transmissions can be determined, and then the G-RNTI of the DCI for scheduling MBS PDSCH new transmissions can be used as the C-RNTI. Therefore, when it is necessary to set the NDI in the DCI for scheduling MBS PDSCH retransmissions in PTP mode, the NDI can be set according to the DCI for scheduling MBS PDSCH new transmissions.

[0148] For example, based on Figure 3 In the illustrated embodiment, the G-RNTI of DCI#1 for scheduling new MBS PDSCH transmissions can be used as the C-RNTI. When it is necessary to set the NDI in DCI#3 for scheduling MBS PDSCH retransmissions in PTP mode, since the RNTI of scrambled DCI#3 is a C-RNTI, and the RNTI of scrambled DCI#1 is also used as a C-RNTI, the RNTI of scrambled DCI#3 is the same as the RNTI of scrambled DCI#1. Therefore, when DCI#3 is used as the first DCI, DCI#1 can be used as the second DCI. The NDI in DCI#3 is then set according to the NDI in DCI#1. Since the NDI in DCI#1 is 1, and DCI#3 is used for scheduling retransmissions, the NDI in DCI#3 can be set without inversion relative to the NDI in DCI#1, i.e., set to 1. DCI#3 is then sent to the terminal, allowing the terminal to use the NDI in DCI#3 to indicate retransmissions.

[0149] The technical solutions of this disclosure are illustrated by way of several embodiments below.

[0150] Figure 9 This is a schematic diagram illustrating the determination of the meaning of NDI according to an embodiment of the present disclosure.

[0151] like Figure 9As shown, UE1 and UE2 support communication modes including but not limited to PTM mode 1 and PTP mode. They also support scheduling unicast services via unicast DCI. Since UE1 and UE2 belong to the same group, they can receive the same multicast DCI used for scheduling multicast services.

[0152] First, the communication process between the network side and UE1 is described:

[0153] The network sends unicast DCI#11 to UE1 to schedule unicast PDSCH new transmissions. The NDI value in DCI#11 is 1, and DCI#11 is scrambled using C-RNTI. After UE1 successfully receives the message, it sends HARQ-ACK to the network.

[0154] Next, the network sends unicast DCI#12 to UE1 to schedule unicast PDSCH new transmissions. The NDI value in DCI#12 is 0, and DCI#12 is scrambled using C-RNTI. After UE1 fails to receive the signal, it sends HARQ-NACK to the network.

[0155] Next, the network sends unicast DCI#13 to UE1 to schedule unicast PDSCH retransmission. The NDI value in DCI#13 is 0, and DCI#13 is scrambled using C-RNTI. After UE1 successfully receives the message, it sends HARQ-ACK to the network.

[0156] Next, the network side sends multicast DCI#14 to UE1 based on PTM mode 1 (UE2 can also receive it), which is used to schedule MBS PDSCH new transmissions. The NDI value in DCI#14 is 0, and DCI#14 is scrambled by G-RNTI. After UE1 successfully receives it, it sends HARQ-ACK to the network side.

[0157] Next, the network side sends multicast DCI#15 to UE1 based on PTM mode 1 (UE2 can also receive it), which is used to schedule MBS PDSCH new transmissions. The NDI value in DCI#15 is 1, and DCI#15 is scrambled by G-RNTI. After UE1 successfully receives it, it sends HARQ-ACK to the network side.

[0158] Next, the network sends unicast DCI#16 to UE2 to schedule unicast PDSCH retransmission. The NDI value in DCI#16 is 1, and DCI#16 is scrambled using C-RNTI. After UE1 successfully receives the data, it sends HARQ-ACK to the network.

[0159] During this process, when UE1 determines the NDI indication information in unicast DCI#16, it does not rely on the NDI in the most recent DCI#15 before DCI#16. Instead, it searches for the most recent DCI scrambled via C-RNTI among the DCIs preceding DCI#16, which leads to DCI#13. Then, based on the relationship between the NDI in DCI#13 and the NDI in DCI#16, it determines the NDI indication information in DCI#16. Since the NDI value in DCI#16 is 1 and the NDI value in DCI#13 is 0, the NDI in DCI#16 is flipped relative to the NDI in DCI#13. Therefore, the NDI in DCI#16 is used to indicate new transmissions, meaning DCI#16 is used to schedule MBS PDSCH new transmissions.

[0160] The following describes the communication process between the network side and UE2:

[0161] The network sends unicast DCI#17 to UE2 to schedule unicast PDSCH new transmissions. The NDI value in DCI#17 is 0, and DCI#17 is scrambled using C-RNTI. Upon successful reception, UE2 sends HARQ-ACK to the network.

[0162] Next, the network sends unicast DCI#18 to UE1 to schedule unicast PDSCH new transmissions. The NDI value in DCI#18 is 1, and DCI#18 is scrambled using C-RNTI. After UE2 successfully receives the message, it sends HARQ-ACK to the network.

[0163] Next, the network side sends multicast DCI#14 to UE2 based on PTM mode 1 (UE1 can also receive it), which is used to schedule MBS PDSCH new transmissions. The NDI value in DCI#14 is 0, and DCI#14 is scrambled by G-RNTI. After UE1 successfully receives it, it sends HARQ-ACK to the network side.

[0164] Next, the network side sends multicast DCI#15 to UE1 based on PTM mode 1 (UE1 can also receive it), which is used to schedule MBS PDSCH new transmissions. The NDI value in DCI#15 is 1, and DCI#15 is scrambled by G-RNTI. After UE1 successfully receives it, it sends HARQ-ACK to the network side.

[0165] Next, the network sends unicast DCI#19 to UE2 to schedule unicast PDSCH retransmission. The NDI value in DCI#19 is 0, and DCI#19 is scrambled using C-RNTI. After successfully receiving the message, UE2 sends HARQ-ACK to the network.

[0166] During this process, when UE2 determines the NDI indication information in unicast DCI#19, it does not rely on the NDI in the most recent DCI#15 preceding DCI#19. Instead, it searches for the most recent DCI scrambled via C-RNTI among the DCIs preceding DCI#19, which leads to DCI#18. Then, based on the relationship between the NDI in DCI#18 and the NDI in DCI#19, it determines the NDI indication information in DCI#19. Since the NDI value in DCI#19 is 0 and the NDI value in DCI#18 is 1, the NDI in DCI#19 is flipped relative to the NDI in DCI#18. Therefore, the NDI in DCI#19 is used to indicate new transmissions, meaning DCI#19 is used to schedule MBS PDSCH new transmissions.

[0167] Figure 10 This is a schematic diagram illustrating another way of determining the meaning of NDI according to an embodiment of the present disclosure.

[0168] like Figure 10 As shown, UE1 and UE2 support communication modes including but not limited to PTM mode 1 and PTP mode. They also support scheduling unicast services via unicast DCI. Since UE1 and UE2 belong to the same group, they can receive the same multicast DCI used for scheduling multicast services.

[0169] First, the communication process between the network side and UE1 is described:

[0170] The network side sends a lead DCI#21 to UE1 based on PTM mode 1 to schedule new MBS PDSCH transmissions. The NDI value in DCI#21 is 1, and DCI#21 is scrambled using G-RNTI. After UE1 fails to receive the signal, it sends a HARQ-NACK to the network side.

[0171] Next, the network sends unicast DCI#22 to UE1 to schedule unicast PDSCH new transmissions. The NDI value in DCI#22 is 0, and DCI#22 is scrambled using C-RNTI. After UE2 fails to receive the signal, it sends HARQ-ACK to the network.

[0172] Next, the network sends unicast DCI#23 to UE1 to schedule unicast PDSCH retransmission. The NDI value in DCI#23 is 0, and DCI#18 is scrambled using C-RNTI. After UE2 successfully receives the data, it sends HARQ-ACK to the network.

[0173] Next, the network side performs multicast services, sending DCI#24 to the terminal based on PTP mode to schedule MBSPDSCH retransmission. The NDI value in DCI#24 is 1, and DCI#24 is scrambled by C-RNTI.

[0174] During this process, when UE1 determines the NDI indication information in unicast DCI#24, it does not rely on the NDI in the most recent DCI#23 before DCI#24. Instead, it first treats the C-RNTI of scrambled DCI#24 as the G-RNTI, and then searches for the most recent DCI scrambled via G-RNTI among the DCIs before DCI#24. This leads to DCI#21, and the relationship between the NDI in DCI#21 and the NDI in DCI#24 determines the NDI indication information in DCI#24. Since the NDI value in DCI#24 is 1, and the NDI value in DCI#21 is also 1, the NDI in DCI#24 is not flipped relative to the NDI in DCI#21. Therefore, the NDI in DCI#24 is used to indicate retransmission, that is, DCI#24 is used to schedule MBS PDSCH retransmission.

[0175] Regarding the communication process between the network side and UE2, UE2 can first treat the C-RNTI scrambled by DCI#24 as the G-RNTI, and then search for the most recently scrambled DCI using the G-RNTI among the DCIs preceding DCI#24. This will lead to DCI#21. Based on the relationship between the NDI in DCI#21 and the NDI in DCI#24, the information indicated by the NDI in DCI#24 can be determined. Since the value of the NDI in DCI#24 is 1, and the value of the NDI in DCI#21 is also 1, the NDI in DCI#24 is not flipped relative to the NDI in DCI#21. Therefore, the NDI in DCI#24 is used to indicate retransmission, that is, DCI#24 is used to schedule MBS PDSCH retransmission.

[0176] Corresponding to the foregoing embodiments of the instruction determination method and the information setting method, this disclosure also provides embodiments of the instruction determination device and the information setting device.

[0177] Figure 11 This is a schematic block diagram illustrating an indication determination device according to an embodiment of the present disclosure. The indication determination device shown in this embodiment can be applied to terminals, including but not limited to mobile phones, tablets, wearable devices, sensors, and Internet of Things (IoT) devices (such as NB-IoT (Narrow Band Internet of Things), MTC (Machine Type Communication), and eMTC (Enhanced Machine Type Communication)). The terminal can communicate with network-side devices, including but not limited to network-side devices in 4G, 5G, and 6G communication systems, such as base stations and core networks.

[0178] like Figure 11 As shown, the indication determining device may include:

[0179] Processing module 1101 is configured to acquire a first new data identifier (NDI) in a first downlink control information (DCI) sent by a network-side device, wherein the first DCI is scrambled by a first radio network temporary identifier (RNTI).

[0180] Obtain the second DCI that was most recently received before the first DCI, wherein the second RNTI of the scrambled second DCI is the same as the first RNTI;

[0181] The information indicated by the first NDI is determined based on the relationship between the second NDI and the first NDI in the second DCI.

[0182] In one embodiment, the Hybrid Automatic Repeat Request Process ID (HARQ processID) in the second DCI is the same as the HARQ process ID in the first DCI.

[0183] In one embodiment, the processing module is configured to determine that the first NDI is used to indicate a new transmission in response to the second NDI being different from the first NDI; and to determine that the first NDI is used to indicate a retransmission in response to the second NDI being the same as the first NDI.

[0184] In one embodiment, the first DCI and the second DCI are at least one of the DCIs used for the following purposes:

[0185] DCI used for scheduling the physical downlink shared channel (unicast PDSCH) for unicast services;

[0186] DCI used for scheduling new transmissions of the Physical Downlink Shared Channel (MBS PDSCH) for multicast services;

[0187] The DCI is used to schedule retransmissions of the Physical Downlink Shared Channel (MBS) PDSCH for multicast services.

[0188] In one embodiment, the DCI used to schedule unicast PDSCH is scrambled via C-RNTI;

[0189] The DCI used for scheduling new MBS PDSCH transmissions is scrambled via G-RNTI;

[0190] The DCI used to schedule MBS PDSCH retransmissions is scrambled via C-RNTI.

[0191] In one embodiment, the processing module is configured to treat the scrambled RNTI of the DCI for retransmitting the MBS PDSCH in the Point-to-Point PTP mode as the G-RNTI, and obtain the second DCI most recently received before the first DCI.

[0192] In one embodiment, the processing module is configured to, in response to the successful reception of an MBS PDSCH retransmission scheduled by the DCI for scheduling PTP mode MBS PDSCH retransmission, treat the scrambled RNTI of the DCI for scheduling PTP mode MBS PDSCH retransmission as a G-RNTI, and obtain the second DCI most recently received before the first DCI.

[0193] In one embodiment, the processing module is configured to, in response to the existence of a DCI for scheduling MBS PDSCH retransmission in PTP mode, determine a DCI for scheduling MBS PDSCH newtransmission and treat the G-RNTI of the DCI for scheduling MBS PDSCH newtransmission as a C-RNTI.

[0194] Figure 12 This is a schematic block diagram illustrating an information setting device according to an embodiment of the present disclosure. The information setting device shown in this embodiment can be applied to network-side devices (corresponding to the network side in the above embodiments). The network-side devices can communicate with terminals. The network-side devices include, but are not limited to, base stations in communication systems such as 4G base stations, 5G base stations, and 6G base stations. The terminals include, but are not limited to, communication devices such as mobile phones, tablets, wearable devices, sensors, and Internet of Things devices (e.g., NB-IoT, MTC, eMTC).

[0195] like Figure 12 As shown, the information setting device may include:

[0196] The transmitting module 1201 is configured to transmit first downlink control information (DCI) to the terminal, wherein the first DCI is scrambled by a first radio network temporary identifier (RNTI).

[0197] Processing module 1202 is configured to acquire the second DCI most recently sent to the terminal before the first DCI, wherein the second RNTI scrambled by the second DCI is the same as the first RNTI;

[0198] The first NDI in the first DCI is set according to the second NDI in the second DCI.

[0199] In one embodiment, the Hybrid Automatic Repeat Request Process ID (HARQ processID) in the second DCI is the same as the HARQ process ID in the first DCI.

[0200] In one embodiment, the processing module is configured to, in response to the first DCI being used to schedule new transmissions, set the first NDI to be different from the second NDI, wherein the first NDI is used to indicate new transmissions; and in response to the first DCI being used to schedule retransmissions, set the first NDI to be the same as the second NDI, wherein the first NDI is used to indicate retransmissions.

[0201] In one embodiment, the first DCI and the second DCI are at least one of the DCIs used for the following purposes:

[0202] DCI used for scheduling the physical downlink shared channel (unicast PDSCH) for unicast services;

[0203] DCI used for scheduling new transmissions of the Physical Downlink Shared Channel (MBS PDSCH) for multicast services;

[0204] The DCI is used to schedule retransmissions of the Physical Downlink Shared Channel (MBS) PDSCH for multicast services.

[0205] In one embodiment, the DCI used to schedule unicast PDSCH is scrambled via C-RNTI;

[0206] The DCI used for scheduling new MBS PDSCH transmissions is scrambled via G-RNTI;

[0207] The DCI used to schedule MBS PDSCH retransmissions is scrambled via C-RNTI.

[0208] In one embodiment, the processing module is configured to treat the scrambled RNTI of the DCI for retransmission of the scheduled point-to-point PTP mode MBS PDSCH as the G-RNTI, and obtain the second DCI most recently sent to the terminal before the first DCI.

[0209] In one embodiment, the processing module is configured to, in response to the terminal successfully receiving the MBS PDSCH retransmission scheduled by the DCI for scheduling the MBS PDSCH retransmission in PTP mode, treat the scrambled RNTI of the DCI for scheduling the MBS PDSCH retransmission in PTP mode as the G-RNTI, and obtain the second DCI most recently sent to the terminal before the first DCI.

[0210] In one embodiment, the processing module is configured to, in response to the existence of a DCI for scheduling MBS PDSCH retransmission in PTP mode, determine a DCI for scheduling MBS PDSCH newtransmission, and treat the scrambled RNTI of the DCI for scheduling MBS PDSCH newtransmission as a C-RNTI.

[0211] Regarding the apparatus in the above embodiments, the specific manner in which each module performs its operation has been described in detail in the embodiments of the relevant methods, and will not be elaborated upon here.

[0212] For the device embodiments, since they basically correspond to the method embodiments, the relevant parts can be referred to in the description of the method embodiments. The device embodiments described above are merely illustrative. The modules described as separate components may or may not be physically separate, and the components shown as modules may or may not be physical modules, that is, they may be located in one place or distributed across multiple network modules. Some or all of the modules can be selected to achieve the purpose of this embodiment according to actual needs. Those skilled in the art can understand and implement this without creative effort.

[0213] Embodiments of this disclosure also provide a communication device, comprising: a processor; a memory for storing a computer program; wherein, when the computer program is executed by the processor, the instruction determination method described in any of the above embodiments is implemented.

[0214] Embodiments of this disclosure also provide a communication device, including: a processor; a memory for storing a computer program; wherein, when the computer program is executed by the processor, it implements the information setting method described in any of the above embodiments.

[0215] Embodiments of this disclosure also provide a computer-readable storage medium for storing a computer program that, when executed by a processor, implements the steps of the instruction determination method described in any of the above embodiments.

[0216] Embodiments of this disclosure also propose a computer-readable storage medium for storing a computer program that, when executed by a processor, implements the steps of the information setting method described in any of the above embodiments.

[0217] like Figure 13 As shown, Figure 13 This is a schematic block diagram illustrating an apparatus 1300 for information setting according to an embodiment of the present disclosure. The apparatus 1300 can be provided as a base station. (Refer to...) Figure 13 The device 1300 includes a processing component 1322, a wireless transmitting / receiving component 1324, an antenna component 1326, and a signal processing section specific to the wireless interface. The processing component 1322 may further include one or more processors. One of the processors in the processing component 1322 may be configured to implement the information setting method described in any of the above embodiments.

[0218] Figure 14This is a schematic block diagram illustrating an apparatus 1400 for indicating a specific location according to embodiments of the present disclosure. For example, apparatus 1400 may be a mobile phone, computer, digital broadcasting terminal, messaging device, game console, tablet device, medical device, fitness equipment, personal digital assistant, etc.

[0219] Reference Figure 14 The device 1400 may include one or more of the following components: a processing component 1402, a memory 1404, a power supply component 1406, a multimedia component 1408, an audio component 1410, an input / output (I / O) interface 1412, a sensor component 1414, and a communication component 1416.

[0220] Processing component 1402 typically controls the overall operation of device 1400, such as operations associated with display, telephone calls, data communication, camera operation, and recording operations. Processing component 1402 may include one or more processors 1420 to execute instructions to complete all or part of the steps of the instruction determination method described above. Furthermore, processing component 1402 may include one or more modules to facilitate interaction between processing component 1402 and other components. For example, processing component 1402 may include a multimedia module to facilitate interaction between multimedia component 1408 and processing component 1402.

[0221] Memory 1404 is configured to store various types of data to support the operation of device 1400. Examples of such data include instructions for any application or method operating on device 1400, contact data, phonebook data, messages, pictures, videos, etc. Memory 1404 can be implemented by any type of volatile or non-volatile storage device or a combination thereof, such as static random access memory (SRAM), electrically erasable programmable read-only memory (EEPROM), erasable programmable read-only memory (EPROM), programmable read-only memory (PROM), read-only memory (ROM), magnetic storage, flash memory, magnetic disk, or optical disk.

[0222] Power supply component 1406 provides power to various components of device 1400. Power supply component 1406 may include a power management system, one or more power supplies, and other components associated with generating, managing, and distributing power to device 1400.

[0223] Multimedia component 1408 includes a screen that provides an output interface between the device 1400 and the user. In some embodiments, the screen may include a liquid crystal display (LCD) and a touch panel (TP). If the screen includes a touch panel, the screen may be implemented as a touchscreen to receive input signals from the user. The touch panel includes one or more touch sensors to sense touches, swipes, and gestures on the touch panel. The touch sensors may sense not only the boundaries of the touch or swipe action but also the duration and pressure associated with the touch or swipe operation. In some embodiments, multimedia component 1408 includes a front-facing camera and / or a rear-facing camera. When the device 1400 is in an operating mode, such as a shooting mode or a video mode, the front-facing camera and / or the rear-facing camera may receive external multimedia data. Each front-facing camera and rear-facing camera may be a fixed optical lens system or have focal length and optical zoom capabilities.

[0224] Audio component 1410 is configured to output and / or input audio signals. For example, audio component 1410 includes a microphone (MIC) configured to receive external audio signals when device 1400 is in an operating mode, such as call mode, recording mode, and voice recognition mode. The received audio signals may be further stored in memory 1404 or transmitted via communication component 1416. In some embodiments, audio component 1410 also includes a speaker for outputting audio signals.

[0225] I / O interface 1412 provides an interface between processing component 1402 and peripheral interface modules, such as keyboards, click wheels, buttons, etc. These buttons may include, but are not limited to, home buttons, volume buttons, power buttons, and lock buttons.

[0226] Sensor assembly 1414 includes one or more sensors for providing status assessments of various aspects of device 1400. For example, sensor assembly 1414 may detect the on / off state of device 1400, the relative positioning of components such as the display and keypad of device 1400, changes in position of device 1400 or a component of device 1400, the presence or absence of user contact with device 1400, orientation or acceleration / deceleration of device 1400, and temperature changes of device 1400. Sensor assembly 1414 may include a proximity sensor configured to detect the presence of nearby objects without any physical contact. Sensor assembly 1414 may also include a light sensor, such as a CMOS or CCD image sensor, for use in imaging applications. In some embodiments, sensor assembly 1414 may also include an accelerometer, a gyroscope, a magnetometer, a pressure sensor, or a temperature sensor.

[0227] Communication component 1416 is configured to facilitate wired or wireless communication between device 1400 and other devices. Device 1400 can access wireless networks based on communication standards, such as WiFi, 2G, 3G, 4G LTE, 5G NR, or combinations thereof. In one exemplary embodiment, communication component 1416 receives broadcast signals or broadcast-related information from an external broadcast management system via a broadcast channel. In one exemplary embodiment, communication component 1416 also includes a near-field communication (NFC) module to facilitate short-range communication. For example, the NFC module may be implemented based on radio frequency identification (RFID) technology, Infrared Data Association (IrDA) technology, ultra-wideband (UWB) technology, Bluetooth (BT) technology, and other technologies.

[0228] In an exemplary embodiment, the apparatus 1400 may be implemented by one or more application-specific integrated circuits (ASICs), digital signal processors (DSPs), digital signal processing devices (DSPDs), programmable logic devices (PLDs), field-programmable gate arrays (FPGAs), controllers, microcontrollers, microprocessors, or other electronic components to perform the above-described instruction determination method.

[0229] In an exemplary embodiment, a non-transitory computer-readable storage medium including instructions is also provided, such as a memory 1404 including instructions, which can be executed by a processor 1420 of the device 1400 to complete the above-described instruction determination method. For example, the non-transitory computer-readable storage medium may be a ROM, random access memory (RAM), CD-ROM, magnetic tape, floppy disk, and optical data storage device, etc.

[0230] Other embodiments of this disclosure will readily occur to those skilled in the art upon consideration of the specification and practice of the disclosure herein. This disclosure is intended to cover any variations, uses, or adaptations of this disclosure that follow the general principles of this disclosure and include common knowledge or customary techniques in the art not disclosed herein. The specification and examples are to be considered exemplary only, and the true scope and spirit of this disclosure are indicated by the following claims.

[0231] It should be understood that this disclosure is not limited to the precise structures described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from its scope. The scope of this disclosure is limited only by the appended claims.

[0232] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. The terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0233] The methods and apparatus provided in the embodiments of this disclosure have been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of this disclosure. The descriptions of the embodiments above are only for the purpose of helping to understand the methods and core ideas of this disclosure. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the ideas of this disclosure. Therefore, the content of this specification should not be construed as a limitation of this disclosure.

Claims

1. A method for determining an indication, characterized in that, The method, executed by a terminal, includes: Obtain the first new data identifier (NDI) from the first downlink control information (DCI) sent by the network-side device, wherein the first DCI is scrambled by the first radio network temporary identifier (RNTI); Obtain the second DCI most recently received before the first DCI, wherein the second RNTI scrambled with the second DCI is of the same type as the first RNTI; obtaining the second DCI most recently received before the first DCI includes: taking the RNTI scrambled with the DCI of the scheduled point-to-point PTP mode MBS PDSCH retransmission as a G-RNTI, and obtaining the second DCI most recently received before the first DCI. The information indicated by the first NDI is determined based on the relationship between the second NDI and the first NDI in the second DCI; The first DCI includes a DCI for scheduling new transmissions of the multicast service physical downlink shared channel (MBS PDSCH), and the second DCI includes a DCI for retransmission of the MBS PDSCH. The DCI used for scheduling unicast PDSCH is scrambled via C-RNTI; The DCI used for scheduling new MBS PDSCH transmissions is scrambled via G-RNTI; The DCI used to schedule MBS PDSCH retransmissions is scrambled via C-RNTI.

2. The method according to claim 1, characterized in that, The Hybrid Automatic Repeat Request (HARQ) process ID in the second DCI is the same as the HARQ process ID in the first DCI.

3. The method according to claim 1, characterized in that, The information used to determine the first NDI indication based on the relationship between the second NDI and the first NDI in the second DCI includes: In response to the fact that the second NDI is different from the first NDI, it is determined that the first NDI is used to indicate a new transmission; In response to the fact that the second NDI is the same as the first NDI, it is determined that the first NDI is used to indicate retransmission.

4. The method according to claim 1, characterized in that, The step of using the scrambled RNTI of the DCI retransmitted in the point-to-point PTP mode MBS PDSCH retransmission as the G-RNTI, and obtaining the second DCI most recently received before the first DCI, includes: In response to the successful reception of an MBS PDSCH retransmission scheduled by the DCI used for scheduling MBS PDSCH retransmission in PTP mode, the scrambled RNTI of the DCI used for scheduling MBS PDSCH retransmission in PTP mode is taken as the G-RNTI, and the second DCI most recently received before the first DCI is obtained.

5. An information setting method, characterized in that, Performed by a network-side device, the method includes: Send a first downlink control information (DCI) to the terminal, the first DCI being scrambled with a first radio network temporary identifier (RNTI); Obtain the second DCI most recently sent to the terminal before the first DCI, wherein the second RNTI scrambled with the second DCI is of the same type as the first RNTI; obtaining the second DCI most recently sent to the terminal before the first DCI includes: taking the RNTI scrambled with the DCI of the scheduled point-to-point PTP mode MBS PDSCH retransmission as a G-RNTI, and obtaining the second DCI most recently sent to the terminal before the first DCI; Set the first NDI in the first DCI according to the second NDI in the second DCI; The first DCI includes a DCI for scheduling new transmissions of the multicast service physical downlink shared channel (MBS PDSCH), and the second DCI includes a DCI for retransmission of the MBS PDSCH. The DCI used for scheduling unicast PDSCH is scrambled via C-RNTI; The DCI used for scheduling new MBS PDSCH transmissions is scrambled via G-RNTI; The DCI used to schedule MBS PDSCH retransmissions is scrambled via C-RNTI.

6. The method according to claim 5, characterized in that, The Hybrid Automatic Repeat Request (HARQ) process ID in the second DCI is the same as the HARQ process ID in the first DCI.

7. The method according to claim 5, characterized in that, Setting the first NDI in the first DCI according to the second NDI in the second DCI includes: In response to the first DCI being used to schedule new transmissions, the first NDI is set to be different from the second NDI, and the first NDI is used to indicate new transmissions; In response to the first DCI being used to schedule retransmission, the first NDI is set to be the same as the second NDI, and the first NDI is used to indicate retransmission.

8. The method according to claim 5, characterized in that, The step of using the scrambled RNTI of the DCI retransmitted in the point-to-point PTP mode MBS PDSCH retransmission as the G-RNTI, and obtaining the second DCI most recently sent to the terminal before the first DCI, includes: In response to the terminal successfully receiving the MBS PDSCH retransmission scheduled by the DCI for scheduling the MBS PDSCH retransmission in PTP mode, the RNTI that scrambles the DCI for scheduling the MBS PDSCH retransmission in PTP mode is taken as the G-RNTI, and the second DCI most recently sent to the terminal before the first DCI is obtained.

9. An indication and determination device, characterized in that, Suitable for terminals, the device includes: The processing module is configured to acquire the first new data identifier (NDI) in the first downlink control information (DCI) sent by the network-side device, wherein the first DCI is scrambled by the first radio network temporary identifier (RNTI). Obtain the second DCI most recently received before the first DCI, wherein the second RNTI scrambled with the second DCI is of the same type as the first RNTI; obtaining the second DCI most recently received before the first DCI includes: taking the RNTI scrambled with the DCI of the scheduled point-to-point PTP mode MBS PDSCH retransmission as a G-RNTI, and obtaining the second DCI most recently received before the first DCI. The information indicated by the first NDI is determined based on the relationship between the second NDI and the first NDI in the second DCI; The first DCI includes a DCI for scheduling new transmissions of the multicast service physical downlink shared channel (MBS PDSCH), and the second DCI includes a DCI for retransmission of the MBS PDSCH. The DCI used for scheduling unicast PDSCH is scrambled via C-RNTI; The DCI used for scheduling new MBS PDSCH transmissions is scrambled via G-RNTI; The DCI used to schedule MBS PDSCH retransmissions is scrambled via C-RNTI.

10. An information setting device, characterized in that, Applicable to network-side devices, the device includes: The transmitting module is configured to send a first downlink control information (DCI) to the terminal, wherein the first DCI is scrambled by a first radio network temporary identifier (RNTI). The processing module is configured to acquire the second DCI most recently sent to the terminal before the first DCI, wherein the second RNTI scrambling the second DCI is of the same type as the first RNTI; the acquisition of the second DCI most recently sent to the terminal before the first DCI includes: taking the RNTI scrambling the DCI of the scheduled point-to-point PTP mode MBS PDSCH retransmission as a G-RNTI, and acquiring the second DCI most recently sent to the terminal before the first DCI; Set the first NDI in the first DCI according to the second NDI in the second DCI; The first DCI includes a DCI for scheduling new transmissions of the multicast service physical downlink shared channel (MBS PDSCH), and the second DCI includes a DCI for retransmission of the MBS PDSCH. The DCI used for scheduling unicast PDSCH is scrambled via C-RNTI; The DCI used for scheduling new MBS PDSCH transmissions is scrambled via G-RNTI; The DCI used to schedule MBS PDSCH retransmissions is scrambled via C-RNTI.

11. A communication device, characterized in that, include: processor; Memory used to store computer programs; When the computer program is executed by a processor, it implements the instruction determination method according to any one of claims 1 to 5.

12. A communication device, characterized in that, include: processor; Memory used to store computer programs; When the computer program is executed by a processor, it implements the information setting method according to any one of claims 6 to 10.

13. A computer-readable storage medium for storing a computer program, characterized in that, When the computer program is executed by a processor, it implements the steps in the instruction determination method according to any one of claims 1 to 5.

14. A computer-readable storage medium for storing a computer program, characterized in that, When the computer program is executed by a processor, it implements the steps of the information setting method according to any one of claims 6 to 10.

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