A downlink channel transmission method and apparatus

Abstract

This invention provides a downlink channel transmission method and apparatus to solve the problems of high system overhead and high latency in existing XR service transmission. The downlink channel transmission method of this invention involves: determining the transmission parameters of the Physical Downlink Shared Channel (PDSCH), wherein the transmission parameters include: the number of retransmissions N and the retransmission mode, N≥1, and N is a positive integer; and transmitting the first downlink data carried on the PDSCH according to the transmission parameters. This invention can reduce system overhead and transmission latency of XR services.

Description

Technical Field

[0001] This invention relates to the field of communication technology, and in particular to a downlink channel transmission method and apparatus. Background Technology

[0002] Existing XR (Extended Reality) architectures based on raster segmentation rendering, such as Figure 1 As shown, XR services are rendered on an XR server, and the XR media is transmitted to the extended reality device (XR device) via the 5G air interface. The XR device then transmits tracking information from the XR device side to the 5G base station in real time via the uplink transmission channel, and the base station then transmits it to the XR server. Generally, the XR server and the base station can be connected via fiber optic cable, and the XR device can be a head-mounted display (HMD), XR glasses, or a mobile terminal, etc.

[0003] For XR, especially cloud gaming, latency is critical. For example, the end-to-end latency of cloud gaming needs to be less than 5ms, while the throughput can reach hundreds of megabits per second. Currently, XR transmission assumes to be based on 5G's standardized eMMB (Enhanced Mobile Broadband) and URLLC (Ultra-Reliable and Low Latency Communication) technologies, especially URLLC.

[0004] NR (New Radio) standardized its transmission scheme based on slot aggregation technology in Rel-15, primarily aimed at enhancing coverage and improving transmission reliability. Therefore, this technology is applicable to URLLC scenarios, reducing HARQ latency and achieving low-latency, high-reliability transmission. However, URLLC mainly optimizes small packet transmission scenarios, incurring negligible system overhead. XR scenarios, however, involve real-time transmission of 4K and 8K high-definition video with high throughput. Semi-static PDSCH configuration cannot adapt to changes in outdoor channel conditions, leading to significant system overhead. Furthermore, existing slot-based PDSCH retransmission schemes cannot guarantee correct transmission of XR services on the first attempt. Slot aggregation-based HARQ transmission may also fail to meet latency requirements for scenarios with very high latency demands, such as cloud gaming.

[0005] Currently, there are no specific implementation plans for enhancing 5G for XR. Summary of the Invention

[0006] The purpose of this invention is to provide a downlink channel transmission method and apparatus to solve the problems of high system overhead and high latency caused by existing XR service transmission.

[0007] To achieve the above objectives, embodiments of the present invention provide a downlink channel transmission method applied to a base station, comprising:

[0008] Determine the transmission parameters of the Physical Downlink Shared Channel (PDSCH), wherein the transmission parameters include: the number of retransmissions N and the retransmission method, where N≥1 and N is a positive integer;

[0009] According to the transmission parameters, the first downlink data carried on the PDSCH is transmitted.

[0010] The repetitive transmission method is based on the resource mapping between the PDSCH repetitive transmission and the Physical Downlink Control Channel Listening Opportunity (PDCCH MO).

[0011] The resource mapping method includes one of the following:

[0012] Method 1: The symbols occupied by the PDSCH transmission or repeated PDSCH transmission do not include the symbols occupied by PDCCH MO;

[0013] Method 2: The symbols occupied by the PDSCH transmission or repeated PDSCH transmission include some or all of the symbols occupied by PDCCH MO.

[0014] The resource mapping method is method two; the method further includes:

[0015] When a PDSCH transmission and a PDCCH transmission collide on a symbol occupied by the PDCCH MO, a puncturing operation is performed on the PDSCH that is colliding.

[0016] The resource mapping method is method two, and the method further includes:

[0017] When a PDSCH transmission and a PDCCH transmission collide on a symbol occupied by a PDCCH MO, the colliding PDSCH and PDCCH are frequency-division multiplexed, or the second downlink data carried on the PDCCH is transmitted on other available symbols other than the symbol occupied by the colliding PDCCH MO.

[0018] The transmission parameters are either pre-agreed or configured by the base station.

[0019] The transmission parameters are configured by the base station;

[0020] After determining the retransmission parameters of the Physical Downlink Shared Channel (PDSCH), the method further includes:

[0021] The transmission parameters of the PDSCH are indicated to the terminal through higher-layer signaling and / or physical layer dynamic signaling.

[0022] The transmission parameters for the PDSCH transmission by the terminal, indicated by higher-layer signaling and / or physical layer dynamic signaling, include:

[0023] When the PDSCH repetition type indicator is set to the first value, the number of PDSCH repetitions is semi-statically configured via Radio Resource Control (RRC) dedicated signaling.

[0024] When the PDSCH retransmission type indicator is the second value, the number of PDSCH retransmissions is configured via physical layer dynamic signaling; wherein, the PDSCH retransmission type indicator is configured by the base station via RRC signaling.

[0025] The method further includes:

[0026] When the PDSCH repetition type indication is the second value, the mapping type indication of PDSCH in the nominal repetition slot is configured by RRC dedicated signaling.

[0027] When the mapping type indicator is the third value, the nominal number of PDSCH repeat slots is equal to the actual number of repeat slots;

[0028] When the mapping type indicator is the fourth value, the nominal number of PDSCH repeat slots is less than or equal to the actual number of repeat slots.

[0029] The method of instructing the terminal on the transmission parameters of the PDSCH via physical layer dynamic signaling includes:

[0030] The number of times the PDSCH is repeatedly transmitted by the terminal is explicitly or implicitly indicated through physical layer dynamic signaling.

[0031] The step of explicitly instructing the terminal to repeat the PDSCH transmission number via physical layer dynamic signaling includes:

[0032] The first word field included in the downlink control information (DCI) indicates the number of times the PDSCH is repeatedly transmitted by the terminal.

[0033] The method of implicitly indicating the number of times the PDSCH is repeatedly transmitted by the terminal through physical layer dynamic signaling includes:

[0034] The Time Domain Resource Allocation (TDRA) table indicates the number of times the PDSCH is repeatedly transmitted by the terminal. The TDRA table is pre-agreed or pre-allocated through dedicated RRC signaling and corresponds to the TDRA word field carried in the DCI.

[0035] The method further includes:

[0036] Indicates whether the terminal should skip the PDCCH MO within the first time interval.

[0037] Wherein, indicating whether the terminal skips the PDCCH MO within the first time interval includes:

[0038] The terminal is instructed whether to skip the PDCCHMO within the first time interval via higher-layer signaling and / or physical-layer dynamic signaling.

[0039] The step of instructing the terminal whether to skip the PDCCH MO within the first time interval via physical layer dynamic signaling includes:

[0040] Through physical layer dynamic signaling, the terminal is explicitly or implicitly instructed whether to skip the PDCCHMO within the first time interval.

[0041] The step of explicitly instructing the terminal whether to skip the PDCCHMO within the first time interval via physical layer dynamic signaling includes:

[0042] The second word field included in DCI indicates whether the terminal skips the PDCCH MO within the first time interval.

[0043] The method of implicitly instructing the terminal whether to skip the PDCCHMO within the first time interval through physical layer dynamic signaling includes:

[0044] The TDRA table indicates whether the terminal should skip the PDCCH MO within the first time interval. The TDRA table is pre-agreed or pre-allocated through dedicated RRC signaling and corresponds to the TDRA word field carried in the DCI.

[0045] After indicating whether the terminal should skip the PDCCH MO within the first time interval, the method further includes:

[0046] If the terminal is instructed to skip the PDCCH MO within the first time interval, the PDSCH is transmitted on the resources occupied by the skipped PDCCH MO.

[0047] Wherein, the skipped PDCCH MO is the MO corresponding to the search space of the PDCCH that schedules the current PDSCH.

[0048] Wherein, the first time interval is the PDSCH transmission time.

[0049] The transmission parameters also include: the starting symbol of the starting time slot of the PDSCH transmission and the number of symbols occupied by one PDSCH transmission.

[0050] The number of repeated transmissions refers to the number of PDSCH repeated transmissions or the number of PDSCH repeated time slots.

[0051] To achieve the above objectives, embodiments of the present invention also provide a downlink channel transmission method, applied to a terminal, comprising:

[0052] Obtain the transmission parameters of the Physical Downlink Shared Channel (PDSCH); wherein the transmission parameters include: the number of retransmissions N and the retransmission method, N≥1, and N is a positive integer.

[0053] The transmission parameters are either pre-agreed or indicated by the base station.

[0054] The repetitive transmission method is based on the resource mapping between the PDSCH repetitive transmission and the Physical Downlink Control Channel Listening Opportunity (PDCCH MO).

[0055] The resource mapping method includes one of the following:

[0056] Method 1: The symbols occupied by the PDSCH transmission or repeated PDSCH transmission do not include the symbols occupied by PDCCH MO;

[0057] Method 1: The symbols occupied by the PDSCH transmission or repeated PDSCH transmission include some or all of the symbols occupied by PDCCH MO.

[0058] The transmission parameters are indicated by the base station;

[0059] The acquisition of transmission parameters for the Physical Downlink Shared Channel (PDSCH) includes:

[0060] Receive the first signaling sent by the base station;

[0061] Based on the first signaling, the transmission parameters of PDSCH are obtained. The first signaling includes: higher layer signaling and / or physical layer dynamic signaling.

[0062] Wherein, the first signaling is physical layer dynamic signaling; the step of obtaining the PDSCH transmission parameters based on the first signaling includes:

[0063] The number of repeated transmissions of the PDSCH is obtained based on the explicit or implicit indication of the physical layer dynamic instructions.

[0064] The explicit indication of the physical layer dynamic instruction is the first word field included in the downlink control information (DCI), which is used to indicate the number of repeated transmissions of the PDSCH.

[0065] The implicit indication of the physical layer dynamic instruction is a TDRA table corresponding to the TDRA word field carried in the DCI, and the first preset row of the TDRA table is used to indicate the number of repeated transmissions of the PDSCH.

[0066] The method further includes:

[0067] Based on the transmission parameters, decode the first downlink data carried on the corresponding PDSCH.

[0068] The resource mapping method is method two; the method further includes:

[0069] If it is known that a collision has occurred between PDSCH and PDCCH transmissions on the symbols occupied by the PDCCH MO, and the colliding PDSCH and PDCCH are frequency-division multiplexed, then listen to the PDCCH on the corresponding PDCCH MO; or,

[0070] If it is known that a collision has occurred between a PDSCH transmission and a PDCCH transmission on a symbol occupied by a PDCCH MO, then listen for PDCCH on other PDCCH MOs other than the symbol occupied by the PDCCH MO that caused the collision.

[0071] The method further includes:

[0072] Based on the base station indication, determine whether to skip the PDCCH MO in the first time interval;

[0073] If the base station indicates that the PDCCH MO within the first time interval should not be skipped, then the PDCCH MO should be listened to within the first time interval.

[0074] If the base station indicates to skip the PDCCH MO in the first time interval, then listen for the PDCCH MO in other time intervals besides the first time interval.

[0075] In the case of indicating that the PDCCH MO within the first time interval is to be skipped, the skipped PDCCH MO is the MO corresponding to the search space of the PDCCH that schedules the current PDSCH.

[0076] The step of determining whether to skip the PDCCH MO within the first time interval via base station indication includes:

[0077] Receive the second signaling sent by the base station;

[0078] Based on the second signaling, it is determined whether to skip the PDCCH MO within the first time interval, the second signaling including higher-layer signaling and / or physical layer dynamic signaling.

[0079] The second signaling is physical layer dynamic signaling;

[0080] The step of determining whether to skip the PDCCH MO within the first time interval according to the second signaling includes:

[0081] Based on the explicit or implicit indication of the physical layer dynamic signaling, determine whether the PDSCH skips the PDCCH MO within the first time interval.

[0082] The explicit indication of the physical layer dynamic instruction is the second word field included in the DCI, which is used to indicate whether to skip the PDCCH MO within the first time interval;

[0083] The implicit indication of the physical layer dynamic instruction is a TDRA table corresponding to the TDRA word field carried in the DCI. The second preset row or the first preset column of the TDRA table is used to indicate whether to skip the PDCCH MO in the first time interval.

[0084] Wherein, the first time interval is the PDSCH transmission time.

[0085] The transmission parameters also include: the starting symbol of the starting time slot of the PDSCH transmission and the number of symbols occupied by one PDSCH transmission.

[0086] The number of repeated transmissions refers to the number of PDSCH repeated transmissions or the number of PDSCH repeated time slots.

[0087] To achieve the above objectives, embodiments of the present invention also provide a downlink channel transmission apparatus, comprising: a memory, a transceiver, and a processor: the memory for storing program instructions; the transceiver for transmitting and receiving data under the control of the processor; and the processor for reading the program instructions from the memory and performing the following operations:

[0088] Determine the transmission parameters of the Physical Downlink Shared Channel (PDSCH), wherein the transmission parameters include: the number of retransmissions N and the retransmission method, where N≥1 and N is a positive integer;

[0089] According to the transmission parameters, the first downlink data carried on the PDSCH is transmitted.

[0090] The repetitive transmission method is based on the resource mapping between the PDSCH repetitive transmission and the Physical Downlink Control Channel Listening Opportunity (PDCCH MO).

[0091] The resource mapping method includes one of the following:

[0092] Method 1: The symbols occupied by the PDSCH transmission or repeated PDSCH transmission do not include the symbols occupied by PDCCH MO;

[0093] Method 2: The symbols occupied by the PDSCH transmission or repeated PDSCH transmission include some or all of the symbols occupied by PDCCH MO.

[0094] The resource mapping method is Method Two; the processor specifically includes:

[0095] When a PDSCH transmission and a PDCCH transmission collide on a symbol occupied by the PDCCH MO, a puncturing operation is performed on the PDSCH that is colliding.

[0096] The resource mapping method is Method Two, and the processor specifically includes:

[0097] When a collision occurs between a PDSCH transmission and a PDCCH transmission on a symbol occupied by a PDCCH MO, the colliding PDSCH and PDCCH are frequency-division multiplexed, or...

[0098] The transceiver specifically includes:

[0099] Transmit the second downlink data carried on the PDCCH on the available symbols other than the symbols occupied by the PDCCH MO that caused the collision.

[0100] The transmission parameters are either pre-agreed or configured by the base station.

[0101] The transmission parameters are configured by the base station; the processor specifically includes:

[0102] The transmission parameters of the PDSCH are indicated to the terminal through higher-layer signaling and / or physical layer dynamic signaling.

[0103] The processor specifically includes:

[0104] When the PDSCH repetition type indicator is set to the first value, the number of PDSCH repetitions is semi-statically configured via Radio Resource Control (RRC) dedicated signaling.

[0105] When the PDSCH retransmission type indicator is the second value, the number of PDSCH retransmissions is configured via physical layer dynamic signaling; wherein, the PDSCH retransmission type indicator is configured by the base station via RRC signaling.

[0106] The processor specifically includes:

[0107] When the PDSCH repetition type indication is the second value, the mapping type indication of PDSCH in the nominal repetition slot is configured by RRC dedicated signaling.

[0108] When the mapping type indicator is the third value, the nominal number of PDSCH repeat slots is equal to the actual number of repeat slots;

[0109] When the mapping type indicator is the fourth value, the nominal number of PDSCH repeat slots is less than or equal to the actual number of repeat slots.

[0110] The processor specifically includes:

[0111] The number of times the PDSCH is repeatedly transmitted by the terminal is explicitly or implicitly indicated through physical layer dynamic signaling.

[0112] The processor specifically includes:

[0113] The first word field included in the downlink control information (DCI) indicates the number of times the PDSCH is repeatedly transmitted by the terminal.

[0114] Specifically, the processor includes: a Time Domain Resource Allocation (TDRA) table that indicates the number of times the PDSCH is repeatedly transmitted by the terminal; the TDRA table is pre-agreed or pre-allocated through dedicated RRC signaling and corresponds to the TDRA word field carried in the DCI.

[0115] The processor specifically includes:

[0116] Indicates whether the terminal should skip the PDCCH MO within the first time interval.

[0117] Specifically, the processor includes: instructing the terminal whether to skip the PDCCH MO within a first time interval via higher-layer signaling and / or physical-layer dynamic signaling.

[0118] Specifically, the processor includes: explicitly or implicitly instructing the terminal whether to skip the PDCCH MO within the first time interval through physical layer dynamic signaling.

[0119] The processor specifically includes:

[0120] The second word field included in DCI indicates whether the terminal skips the PDCCH MO within the first time interval.

[0121] The processor specifically includes:

[0122] The TDRA table indicates whether the terminal should skip the PDCCH MO within the first time interval. The TDRA table is pre-agreed or pre-allocated through dedicated RRC signaling and corresponds to the TDRA word field carried in the DCI.

[0123] The transceiver specifically includes:

[0124] If the terminal is instructed to skip the PDCCH MO within the first time interval, the PDSCH is transmitted on the resources occupied by the skipped PDCCH MO.

[0125] Wherein, the skipped PDCCH MO is the MO corresponding to the search space of the PDCCH that schedules the current PDSCH.

[0126] Wherein, the first time interval is the PDSCH transmission time.

[0127] The transmission parameters also include: the starting symbol of the starting time slot of the PDSCH transmission and the number of symbols occupied by one PDSCH transmission.

[0128] The number of repeated transmissions refers to the number of PDSCH repeated transmissions or the number of PDSCH repeated time slots.

[0129] To achieve the above objectives, embodiments of the present invention also provide a downlink channel transmission apparatus, comprising:

[0130] The parameter determination module is used to determine the transmission parameters of the Physical Downlink Shared Channel (PDSCH), wherein the transmission parameters include: the number of retransmissions N and the retransmission method, where N≥1 and N is a positive integer;

[0131] The first transmission module is used to transmit the first downlink data carried on the PDSCH according to the transmission parameters.

[0132] To achieve the above objectives, embodiments of the present invention also provide a downlink channel transmission apparatus, comprising: a memory, a transceiver, and a processor: the memory for storing program instructions; the transceiver for transmitting and receiving data under the control of the processor; and the processor for reading the program instructions from the memory and performing the following operations:

[0133] Obtain the transmission parameters of the Physical Downlink Shared Channel (PDSCH); wherein the transmission parameters include: the number of retransmissions N and the retransmission method, N≥1, and N is a positive integer.

[0134] The transmission parameters are either pre-agreed or indicated by the base station.

[0135] The repetitive transmission method is based on the resource mapping between the PDSCH repetitive transmission and the Physical Downlink Control Channel Listening Opportunity (PDCCH MO).

[0136] The resource mapping method includes one of the following:

[0137] Method 1: The symbols occupied by the PDSCH transmission or repeated PDSCH transmission do not include the symbols occupied by PDCCH MO;

[0138] Method 2: The symbols occupied by the PDSCH transmission or repeated PDSCH transmission include some or all of the symbols occupied by PDCCH MO.

[0139] The transmission parameters are indicated by the base station; the transceiver specifically includes:

[0140] Receive the first signaling sent by the base station;

[0141] The processor specifically includes:

[0142] Based on the first signaling, the transmission parameters of PDSCH are obtained. The first signaling includes: higher layer signaling and / or physical layer dynamic signaling.

[0143] Wherein, the first signaling is physical layer dynamic signaling; the processor specifically includes:

[0144] The number of repeated transmissions of the PDSCH is obtained based on the explicit or implicit indication of the physical layer dynamic instructions.

[0145] The explicit indication of the physical layer dynamic instruction is the first word field included in the downlink control information (DCI), which is used to indicate the number of repeated transmissions of the PDSCH.

[0146] The implicit indication of the physical layer dynamic instruction is a TDRA table corresponding to the TDRA word field carried in the DCI, and the first preset row of the TDRA table is used to indicate the number of repeated transmissions of the PDSCH.

[0147] The processor specifically includes:

[0148] Based on the transmission parameters, decode the first downlink data carried on the corresponding PDSCH.

[0149] The resource mapping method is Method Two; the processor specifically includes:

[0150] If it is known that a collision has occurred between PDSCH and PDCCH transmissions on the symbols occupied by the PDCCH MO, and the colliding PDSCH and PDCCH are frequency-division multiplexed, then listen to the PDCCH on the corresponding PDCCH MO; or,

[0151] If it is known that a collision has occurred between a PDSCH transmission and a PDCCH transmission on a symbol occupied by a PDCCH MO, then listen for PDCCH on other PDCCH MOs other than the symbol occupied by the PDCCH MO that caused the collision.

[0152] The processor specifically includes:

[0153] Based on the base station indication, determine whether to skip the PDCCH MO in the first time interval;

[0154] If the base station indicates that the PDCCH MO within the first time interval should not be skipped, then the PDCCH MO should be listened to within the first time interval.

[0155] If the base station indicates to skip the PDCCH MO in the first time interval, then listen for the PDCCH MO in other time intervals besides the first time interval.

[0156] In the case of indicating that the PDCCH MO within the first time interval is to be skipped, the skipped PDCCH MO is the MO corresponding to the search space of the PDCCH that schedules the current PDSCH.

[0157] The transceiver specifically includes:

[0158] Receive the second signaling sent by the base station;

[0159] The processor specifically includes:

[0160] Based on the second signaling, it is determined whether to skip the PDCCH MO within the first time interval, the second signaling including higher-layer signaling and / or physical layer dynamic signaling.

[0161] The second signaling is physical layer dynamic signaling;

[0162] The processor specifically includes: determining whether the PDSCH skips the PDCCH MO within the first time interval based on the explicit or implicit indication of the physical layer dynamic signaling.

[0163] The explicit indication of the physical layer dynamic instruction is the second word field included in the DCI, which is used to indicate whether to skip the PDCCH MO within the first time interval;

[0164] The implicit indication of the physical layer dynamic instruction is a TDRA table corresponding to the TDRA word field carried in the DCI. The second preset row or the first preset column of the TDRA table is used to indicate whether to skip the PDCCH MO in the first time interval.

[0165] Wherein, the first time interval is the PDSCH transmission time.

[0166] The transmission parameters also include: the starting symbol of the starting time slot of the PDSCH transmission and the number of symbols occupied by one PDSCH transmission.

[0167] The number of repeated transmissions refers to the number of PDSCH repeated transmissions or the number of PDSCH repeated time slots.

[0168] To achieve the above objectives, embodiments of the present invention also provide a downlink channel transmission apparatus, comprising:

[0169] The acquisition module is used to acquire the transmission parameters of the Physical Downlink Shared Channel (PDSCH); wherein the transmission parameters include: the number of retransmissions N and the retransmission method, N≥1, and N is a positive integer.

[0170] To achieve the above objectives, embodiments of the present invention also provide a processor-readable storage medium, characterized in that the processor-readable storage medium stores program instructions for causing the processor to execute the steps of the downlink channel transmission method as described above.

[0171] The above-described technical solution of the present invention has at least the following beneficial effects:

[0172] In the above technical solution of the present invention, by determining the transmission parameters of the Physical Downlink Shared Channel (PDSCH), wherein the transmission parameters include: the number of retransmissions N and the retransmission method, N≥1 and N is a positive integer; and transmitting the PDSCH according to the transmission parameters, the system overhead and transmission latency of XR services can be reduced. Attached Figure Description

[0173] Figure 1 This is a schematic diagram of a downlink transmission structure based on mini-slot.

[0174] Figure 2 This is one of the flowcharts illustrating the downlink channel transmission method provided in an embodiment of the present invention;

[0175] Figure 3 This is a schematic diagram of the PDSCH repeated transmission structure corresponding to the resource mapping method of Method 2 in this embodiment of the invention;

[0176] Figure 4This is one of the schematic diagrams of the PDSCH repeated transmission structure corresponding to the resource mapping method of Method 2 in this embodiment of the invention;

[0177] Figure 5 This is the second schematic diagram of the PDSCH repeated transmission structure corresponding to the resource mapping method of the present invention, which is method two;

[0178] Figure 6 This is a schematic diagram of a downlink transmission structure in which multiple PDCCH MOs are configured for the PDCCH search space within a slot according to an embodiment of the present invention.

[0179] Figure 7 This is a schematic diagram of the downlink transmission structure of slot-based PDSCH transmission according to an embodiment of the present invention;

[0180] Figure 8 This is one of the schematic diagrams of a slot-based PDSCH repetitive transmission structure according to an embodiment of the present invention;

[0181] Figure 9 This is the second schematic diagram of the slot-based PDSCH repetitive transmission structure according to an embodiment of the present invention;

[0182] Figure 10 This is a second flowchart illustrating the downlink channel transmission method provided in an embodiment of the present invention.

[0183] Figure 11 This is one of the structural block diagrams of the downlink channel transmission device according to an embodiment of the present invention;

[0184] Figure 12 This is one of the module schematic diagrams of the downlink channel transmission device according to an embodiment of the present invention;

[0185] Figure 13 This is a second structural block diagram of the downlink channel transmission device according to an embodiment of the present invention;

[0186] Figure 14 This is a second schematic diagram of the downlink channel transmission device according to an embodiment of the present invention. Detailed Implementation

[0187] In this embodiment of the invention, the term "and / or" describes the relationship between associated objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. The character " / " generally indicates that the preceding and following associated objects have an "or" relationship.

[0188] In the embodiments of this application, the term "multiple" refers to two or more, and other quantifiers are similar.

[0189] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0190] Before detailing the embodiments of this application, let's briefly understand the scheduling method.

[0191] NR supports slot-based scheduling, which uses 14 OFDM symbols. To reduce transmission latency, the NR standard also supports non-slot-based scheduling, also known as mini-slot scheduling.

[0192] Based on the mini-slot scheduling method, the base station can schedule X (X = 2, 4, 7) OFDM symbols. For XR services, mini-slot-based scheduling will be reused to reduce latency. For mini-slot scheduling, the base station configures multiple PDCCH (Physical Downlink Control Channel) MOs (Monitoring Occasions) for the terminal in one slot, and the terminal detects the PDCCH on each PDCCH MO.

[0193] In one example, a downlink transmission structure based on mini-slots is as follows: Figure 1As shown, in each PDCCH detection cycle, three time slots are configured as downlink time slots or semi-statically configured as flexible time slots by SIB (System Information Block) 1 or RRC (Radio Resource Control) signaling. In each time slot, the base station uses dedicated signaling to configure the PDCCH listening pattern for the terminal. In this example, each slot includes 14 OFDM symbols, with the corresponding PDCCH listening opportunities (MOs) located on symbols 1, 2, 8, and 9. That is, in this example, each slot contains 2 PDCCH MOs. The PDCCH schedules the PDSCH (Physical Downlink Shared Channel) within this time slot, and even the corresponding HARQ-ACK (Hybrid Automatic Repeat Request Acknowledgement) can be completed within this time slot, thus helping to reduce transmission latency.

[0194] In addition, to expand coverage and improve reliability, NR standardized slot aggregation technology in Rel-15, meaning that a single PDCCH can be scheduled across multiple consecutive slots. Specifically, the base station uses dedicated RRC signaling to configure the number of aggregation slots for the PDSCH (pdsch-AggregationFactor = 2, 4, or 8). The base station will repeatedly transmit the encoded bits of one TB (Transport Block) across pdsch-AggregationFactor slots. The PDSCH transmission resources within each slot are consistent with the PDCCH scheduling, meaning it's a repetition of the transmission resources within the first slot. The difference lies in the fact that the RV (Redundancy Version) of the corresponding PDSCH within each slot can be different.

[0195] like Figure 2 The diagram shown is one of the flowcharts of a downlink channel transmission method provided in an embodiment of the present invention, applied to a base station, and includes:

[0196] Step 201: Determine the transmission parameters of the Physical Downlink Shared Channel (PDSCH), wherein the transmission parameters include: the number of retransmissions N and the retransmission method, N≥1, and N is a positive integer;

[0197] In this step, when the number of repeated transmissions N=1, it means that only one PDSCH transmission is needed, and no additional repeated transmissions are required.

[0198] Optionally, the number of repeated transmissions is the number of PDSCH repeated transmissions or the number of PDSCH repeated time slots.

[0199] It should be noted that if the base station adopts the slot-based PDSCH scheduling method, the number of repeated transmissions is the number of PDSCH repeated time slots; if the base station adopts the min-slot-based PDSCH scheduling method, the number of repeated transmissions is the number of PDSCH repeated transmissions.

[0200] Optionally, the transmission parameters further include: the starting symbol S of the starting time slot of the PDSCH transmission and the number of symbols L occupied by one PDSCH transmission.

[0201] It should be noted that when the base station adopts the PDSCH scheduling method based on min-slot, it is preferable that L < 7. For example, PDCCH and PDSCH together occupy 2, 4 or 7 OFDM symbols, which is exactly one min-slot. The value of L can also be greater than 7 and less than 14, and scenarios where L > 14 are not excluded.

[0202] Step 202: Transmit the first downlink data carried on the PDSCH according to the transmission parameters.

[0203] The downlink channel transmission method of this invention determines the transmission parameters of the Physical Downlink Shared Channel (PDSCH), wherein the transmission parameters include: the number of retransmissions N and the retransmission method, N≥1 and N is a positive integer; and the PDSCH is transmitted according to the transmission parameters, thereby reducing system overhead and transmission latency of XR services.

[0204] Optionally, the retransmission method is based on the resource mapping method between the PDSCH retransmission and the Physical Downlink Control Channel Sense Opportunity (PDCCH MO).

[0205] Specifically, the resource mapping method includes one of the following:

[0206] Method 1: The symbols occupied by the PDSCH transmission or repeated PDSCH transmission do not include the symbols occupied by PDCCH MO;

[0207] Method 2: The symbols occupied by the PDSCH transmission or repeated PDSCH transmission include some or all of the symbols occupied by PDCCH MO.

[0208] Here, the aforementioned repeated PDSCH specifically refers to the PDSCH being transmitted more than once, that is, the case where the number of repeated transmissions N > 1; while the aforementioned PDSCH without the qualifier "repeated" specifically refers to the PDSCH being transmitted only once, that is, the case where the number of repeated transmissions N = 1.

[0209] Here, when the resource mapping method is Method 1, the PDSCH or repeated PDSCH does not overlap with the PDCCH MO in the first time interval. This can also be understood as the PDSCH or repeated PDSCH not occupying the PDCCH MO in the first time interval. An example is given below to illustrate this.

[0210] Example 1, such as Figure 3 As shown, within a PDCCH search space configuration period, there are multiple PDSCH transmission slots, which can be downlink slots or semi-statically configured flexible slots. Each PDSCH transmission slot supports mini-slot transmission. Within each slot, the base station transmits N*L symbols of PDSCH, starting from the beginning symbol of the PDSCH start slot, based on the number of repetitions N. Corresponding to this figure, 16 symbols of PDSCH are transmitted, where N represents the number of repetitions and L represents the number of symbols occupied by one PDSCH transmission.

[0211] In the figure, starting from the beginning symbol of the PDSCH start slot, that is, the 4th symbol in slot 2, the 4 symbols for transmitting PDSCH are transmitted 4 times and occupy slots 2 and 3. The resources / locations of the PDSCH transmission skip or do not include the OFDM symbols occupied by the PDCCH MO of the subsequent mini-slot.

[0212] The beneficial effect of the transmission scheme based on method one is that, since the total number of symbols in the PDSCH transmission is N*L, which is the total number of symbols in the signaling notification (nominal) repeated transmission, the retransmission performance is guaranteed. At the same time, since the OFDM symbols occupied by the PDCCH MO in the current time slot or the subsequent time slot are skipped during PDSCH transmission, the terminal can continue to detect PDCCH at these PDCCH MOs. For example, for terminals that simultaneously support XR services and their eMMB services or URLLC services, they can be scheduled in a timely manner at these PDCCH MOs.

[0213] As an optional implementation, the resource mapping method is method two; the method of this embodiment of the invention further includes:

[0214] When a PDSCH transmission and a PDCCH transmission collide on a symbol occupied by the PDCCH MO, a puncturing operation is performed on the PDSCH that is colliding.

[0215] Here, when the resource mapping method is Method 2, the PDSCH or repeated PDSCH partially or completely overlaps with the PDCCH MO in the first time interval. This can also be understood as the PDSCH or repeated PDSCH occupying the PDCCH MO in the first time interval.

[0216] Example 2, such as Figure 4 As shown, within a PDCCH search space configuration period, there are multiple PDSCH transmission slots. Within each slot, the base station transmits PDSCH on available resources, starting from the beginning symbol of the PDSCH start slot, according to the number of repetitions N. Corresponding to this diagram, 16 symbols of PDSCH were transmitted.

[0217] In the figure, starting from the beginning symbol of the PDSCH start slot, that is, the 4th symbol in slot 2, the 4 symbols for transmitting PDSCH are transmitted 4 times and occupy slots 2 and 3. The position of the PDSCH transmission includes the OFDM symbol occupied by the PDCCH MO of the subsequent mini-slot.

[0218] However, on the symbols of PDCCH transmission and on the PDCCH transmission resources configured in the PDCCH search space, a puncturing operation needs to be performed on the PDSCH. That is, when the PDSCH is transmitted on the symbol occupied by the PDCCH MO, if the PDSCH transmission resource collides with the PDCCH, a puncturing operation is performed on the PDSCH. In other words, on the resource where the PDSCH transmission resource collides with the PDCCH, the corresponding PDSCH is deleted, i.e., puncture.

[0219] If a PDSCH transmission collides with a PDCCH, after performing a puncturing operation on the PDSCH, the number of PDSCH transmission symbols may be less than N*L or equal to N*L.

[0220] It should be noted that due to the presence of puncturing operations, the number of PDSCH transmission symbols in this scheme cannot be guaranteed to be N*L, that is, it cannot be guaranteed to be the total number of symbols for repeated transmission of signaling notification (nominal).

[0221] The beneficial effects of this implementation are that by not skipping the symbols occupied by PDCCH MO, the transmission latency of PDSCH can be reduced. At the same time, the puncturing operation on PDSCH helps to ensure that the performance of PDCCH is not lost, so that other services can be scheduled while transmitting XR, thus ensuring the flexibility of the base station.

[0222] As another optional implementation, the resource mapping method is method two, and the method of this embodiment of the invention further includes:

[0223] When a PDSCH transmission and a PDCCH transmission collide on a symbol occupied by a PDCCH MO, the colliding PDSCH and PDCCH are frequency-division multiplexed, or the second downlink data carried on the PDCCH is transmitted on other available symbols other than the symbol occupied by the colliding PDCCH MO.

[0224] Here, when a collision occurs between a PDSCH transmission and a PDCCH transmission on a symbol occupied by a PDCCH MO, the colliding PDSCH and PDCCH are frequency-division multiplexed. This means that when mapping PDSCH transmission resources, PDCCH symbols are occupied, but PDCCH frequency domain resources are not. In other words, PDSCH and PDCCH are frequency-division multiplexed on symbols occupied by PDCCH. This does not affect the terminal's detection of PDCCH on the corresponding PDCCH MO, nor does it reduce PDSCH performance.

[0225] Example 3, such as Figure 5 As shown, within a PDCCH search space configuration period, there are multiple PDSCH transmission slots. Within each slot, the base station, starting from the beginning symbol of the PDSCH start slot, repeatedly transmits PDSCH on available resources according to the number of retransmissions N. Corresponding to this diagram, 16 symbols of PDSCH are transmitted.

[0226] In the diagram, starting from the beginning symbol of the PDSCH start slot, i.e., the 4th symbol in slot 2, the 4 symbols transmitting PDSCH are transmitted 4 times, occupying slots 2 and 3. The location of the PDSCH transmission includes the OFDM symbols occupied by the PDCCH MO in the subsequent mini-slot. However, no puncturing operation is performed on the PDSCH transmission resources configured in the PDCCH search space. At the same time, the base station does not transmit PDCCH on the PDCCH MO that collides with the PDSCH, but transmits PDCCH on the PDCCH MO that does not collide with the PDSCH.

[0227] The terminal does not listen to the PDCCH on the PDCCH MO that collides with the PDSCH mentioned above.

[0228] In this scheme, the number of PDSCH transmission symbols can be equal to N*L or less than N*L. N*L is the total number of symbols for the signaling notification (nominal) repeated transmission.

[0229] The advantages of this implementation are that for XR services, such as cloud gaming, which have very high latency requirements and can only use mini-slot scheduling, but have high throughput, it is unnecessary for eMMB services to be transmitted within the PDSCH transmission slot. Retaining the original mini-slot-configured PDCCH resources would lead to unnecessary overhead, and the terminal would need to continuously listen to the mini-slot-based PDCCH, resulting in additional power consumption. Finally, directly using these PDCCH resources for PDSCH transmission, compared to Example 2, not only improves system performance but also reduces transmission latency.

[0230] It should be noted that the above three examples all use L < 7 as an example. To further illustrate, the base station uses RRC signaling to configure PDSCH retransmission parameters in the TDRA table, such as the start symbol S and the number of symbols occupied in one transmission L. The base station can use physical layer dynamic signaling or RRC signaling to configure the number of PDSCH retransmissions N.

[0231] The three examples above all illustrate the scenario of repeated PDSCH transmission based on min-slot scheduling. The basic assumption is that, to support low-latency XR service transmission, the base station uses RRC signaling to configure a search space that facilitates mini-slot scheduling. This means that multiple PDCCH MOs are configured within a single slot for the PDCCH search space, and multiple PDSCH transmission slots can be configured within a single configuration period. Figure 6 As shown, this is beneficial for supporting min-slot scheduling, thereby reducing XR transmission latency.

[0232] However, the actual scheduling of base stations is flexible. Base stations can use mini-slot-based scheduling as described in Examples 1, 2, and 3, or they can utilize a specific PDCCH MO within a time slot to transmit PDCCH, performing slot-based scheduling. Regardless of whether it's slot-based or mini-slot-based scheduling, the number and position of PDCCH MOs corresponding to the search space reconfigured by the base station using RRC will not change.

[0233] For slot-based scheduling, preferably, the method in Example 3 can be adopted, whereby the base station does not send PDCCH on the PDCCH MO that collides with PDSCH; and the terminal does not listen to PDCCH on the PDCCH MO that collides with PDSCH.

[0234] Furthermore, preferably, the base station transmits PDSCH on the resources occupied by PDCCH MO that do not transmit PDCCH. In one example, such as Figure 7 As shown, the starting symbol S of the PDSCH is symbol 4, the symbol length L of the PDSCH is 10, and the base station transmits the PDSCH on the resources occupied by the PDCCH MO. The beneficial effect of this scheme is also to save power for the terminal and reduce system overhead.

[0235] For slot-based scheduling, similar methods to those in Example 1 and Example 2 can be used, where the symbols occupied by the PDSCH transmission do not include the symbols occupied by the PDCCH MO, or the symbols occupied by the PDSCH transmission include some or all of the symbols occupied by the PDCCH MO.

[0236] It should be noted that the above is based on slot-based PDSCH scheduling, and may also include slot-based PDSCH repetitive transmission. The specific method is the same as that based on min-slot scheduling, and will not be repeated here.

[0237] Optionally, the transmission parameters are pre-agreed or configured by the base station.

[0238] The transmission parameters are configured by the base station; after step 201 of the method in this embodiment of the invention, the method further includes:

[0239] The transmission parameters of the PDSCH are indicated to the terminal through higher-layer signaling and / or physical layer dynamic signaling.

[0240] Optionally, higher-level signaling includes: RRC signaling.

[0241] Optionally, physical layer dynamic signaling includes PDCCH.

[0242] As an optional implementation, the step of instructing the terminal on the transmission parameters of the PDSCH transmission via higher-layer signaling and / or physical-layer dynamic signaling includes:

[0243] When the PDSCH repetition type indicator is set to the first value, the number of PDSCH repetitions is semi-statically configured via Radio Resource Control (RRC) dedicated signaling.

[0244] Here, the PDSCH repetition type indicator is used, for example, PDSCH-repetition-type.

[0245] When the PDSCH repetition type indicator is the first value, such as PDSCH-repetition-type=A, the base station adopts a slot-based PDSCH scheduling method and uses RRC dedicated signaling to semi-statically configure the number of PDSCH repetition slots N. The best base station adopts the Rel-15 slots aggregation method to repetitively transmit PDSCH in N slots.

[0246] At this time, the terminal decodes the corresponding PDSCH according to the number of repeated time slots indicated by the physical layer dynamic signaling (such as PDCCH).

[0247] When the PDSCH retransmission type indicator is the second value, the number of PDSCH retransmissions is configured via physical layer dynamic signaling; wherein, the PDSCH retransmission type indicator is configured by the base station via RRC signaling.

[0248] When the PDSCH repetition type indicator is the second value, for example, PDSCH-repetition-type = B, the base station adopts a min-slot-based PDSCH scheduling method and configures the number of min-slot-based PDSCH repetitions through physical layer dynamic signaling. The base station indicates the number of PDSCH repetitions through physical layer dynamic signaling and sends PDSCH according to the number of PDSCH repetitions indicated by the DCI.

[0249] When the PDSCH repetition type indication is the second value, the mapping type indication of PDSCH in the nominal repetition slot is configured by RRC dedicated signaling.

[0250] When the mapping type indicator is the third value, the nominal number of PDSCH repeat slots is equal to the actual number of repeat slots;

[0251] When the mapping type indicator is the fourth value, the nominal number of PDSCH repeat slots is less than or equal to the actual number of repeat slots.

[0252] It should be noted that when the PDSCH repetition type indicator is the second value, such as PDSCH-repetition-type=B, the base station can optionally configure the mapping type indicator of the repetition PDSCH in the nominal repetition slot (i.e. the repetition slot notified by the signaling) through dedicated signaling, such as PDSCH-repetition-mapping-type.

[0253] When the mapping type of the PDSCH in the nominal repetition slot is the third value, such as PDSCH-repetition-mapping-type=A, the base station uses physical layer dynamic signaling (such as PDCCH) to configure the number of PDSCH repetition slots N. The nominal number of PDSCH retransmission slots is equal to the actual number of retransmission slots. For example, the transmission resources in the repetition slot are the same as those in the first slot.

[0254] When the mapping type of the PDSCH in the nominal repetition slot is the fourth value, for example, PDSCH-repetition-mapping-type=B, the base station physical layer dynamic signaling (such as PDCCH) configures the number of PDSCH retransmissions N, the nominal number of PDSCH retransmission slots can be less than the actual number of retransmission slots, such as the PDSCH mapping method in the repetition slot is different from the PDSCH mapping method in the first slot.

[0255] As an optional implementation, the step of instructing the terminal on the transmission parameters of the PDSCH via physical layer dynamic signaling includes:

[0256] The number of times the PDSCH is repeatedly transmitted by the terminal is explicitly or implicitly indicated through physical layer dynamic signaling.

[0257] Here, the base station instructs the terminal on the number of times N to retransmit the PDSCH via physical layer dynamic signaling (such as PDCCH). The base station transmits the corresponding PDSCH in M ​​time slots, where M ≤ N. That is, the number of time slots for PDSCH transmission is less than or equal to the number of times PDSCH is retransmitted as configured by the physical layer dynamic signaling. In other words, the nominal number of PDSCH retransmission slots is less than or equal to the actual number of retransmission slots.

[0258] The following briefly describes the case where the nominal number of PDSCH retransmission slots equals the actual number of retransmission slots.

[0259] like Figure 8 As shown, when the base station adopts a slot-based PDSCH scheduling method, the actual number of PDSCH transmission slots is equal to the number of repeated PDSCH slots configured by the physical layer dynamic signaling. Preferably, the PDSCH transmission resources within each slot are a repetition of the transmission resources within the first slot.

[0260] The following briefly describes the situation where the nominal number of PDSCH retransmission slots is less than the actual number of retransmission slots.

[0261] like Figure 9 As shown, when the base station adopts the slot-based PDSCH scheduling method, the actual number of time slots for PDSCH transmission is less than the nominal number of PDSCH repeating time slots configured by the physical layer dynamic signaling. That is, the base station instructs the terminal on the number of times the PDSCH is repeatedly transmitted (here referring to the number of repeating time slots) through physical layer dynamic signaling. In the figure, the starting time slot for PDSCH transmission is time slot 2, and the starting symbol S is 6, meaning that PDSCH transmission begins from the 6th symbol of time slot 2. The number of symbols L contained in the PDSCH of the starting time slot is 7.

[0262] The base station will continuously transmit repeated PDSCHs on all available symbols except PDCCH, starting from the end symbol of the first PDSCH. That is, the PDSCH mapping method in repeated slots is different from the PDSCH mapping method in the first slot.

[0263] Preferably, the number of PDSCH symbols continuously transmitted by the base station is equal to the number of symbols occupied in the initial time slot multiplied by the number of repeated transmissions N (as shown in the figure, N = 4), that is, the total number of PDSCH symbols transmitted is N*L = 4*7 = 28. Optionally, the number of OFDM symbols occupied between the start and end symbols of the PDSCH, excluding the number of symbols occupied by the PDCCH, is equal to N*L.

[0264] Here, it is quite obvious that... Figure 8 compared to, Figure 9 The beneficial effect of the corresponding solution is to reuse the NRRel-15 protocol to the greatest extent possible, while dynamically changing the number of timeslot repetitions, thereby reducing downlink transmission latency and system overhead.

[0265] Optionally, explicitly indicating the number of times the PDSCH is repeatedly transmitted by the terminal via physical layer dynamic signaling may include:

[0266] The first word field included in the downlink control information (DCI) indicates the number of times the PDSCH is repeatedly transmitted by the terminal.

[0267] In other words, there is a specific word field in DCI used to indicate the number of times PDSCH is repeatedly transmitted.

[0268] Alternatively, the implicit indication of the number of times the PDSCH is repeatedly transmitted by the terminal via physical layer dynamic signaling may include:

[0269] The Time Domain Resource Allocation (TDRA) table indicates the number of times the PDSCH is repeatedly transmitted by the terminal. The TDRA table is pre-agreed or pre-allocated through dedicated RRC signaling and corresponds to the TDRA word field carried in the DCI.

[0270] Optionally, the number of repeated transmissions of PDSCH is carried in the TDRA table. The base station implicitly indicates the number of repeated transmissions of PDSCH by using the TDRA word field carried in DCI to correspond to a certain row of the TDRA table.

[0271] It should be noted that when the base station schedules PDSCH, if the TDRA field value in the DCI is m, it corresponds to row m+1 of the pre-set TDRA table. In other words, for example, if the TDRA field value is m, the m+1 row of the TDRA table corresponding to the TDRA field can be used to indicate the number of times the PDSCH is repeatedly transmitted.

[0272] In one example, the TDRA table can be shown as follows, where K0 represents the offset of PDSCH relative to the time slot where PDCCH is located, S represents the starting symbol of PDSCH within the time slot, and L represents the symbol length allocated to PDSCH within the time slot.

[0273]

[0274]

[0275] As an optional implementation, the method of this embodiment of the invention further includes:

[0276] Indicates whether the terminal should skip the PDCCH MO within the first time interval.

[0277] This step may specifically include:

[0278] The terminal is instructed whether to skip the PDCCHMO within the first time interval via higher-layer signaling and / or physical-layer dynamic signaling.

[0279] Optionally, higher-level signaling includes: RRC signaling.

[0280] Optionally, physical layer dynamic signaling includes PDCCH.

[0281] Here, we assume the higher-layer signaling is SkippingMOorNot. If SkippingMOorNot = true, it means the terminal should skip the PDCCH MO within the first time interval; if SkippingMOorNot = false, it means the terminal should not skip the PDCCH MO within the first time interval. The terminal decides whether to listen to the PDCCH on the corresponding MO within the first time interval based on the base station's instruction.

[0282] As an optional implementation, instructing the terminal whether to skip the PDCCH MO within the first time interval via physical layer dynamic signaling may include:

[0283] Through physical layer dynamic signaling, the terminal is explicitly or implicitly instructed whether to skip the PDCCHMO within the first time interval.

[0284] Optionally, the step of explicitly instructing the terminal whether to skip the PDCCH MO within the first time interval via physical layer dynamic signaling may include:

[0285] The second word field included in DCI indicates whether the terminal skips the PDCCH MO within the first time interval.

[0286] Here, there are explicit word fields in DCI used to indicate PDCCH listening within PDSCH repeat transmission resources.

[0287] Alternatively, the implicit indication via physical layer dynamic signaling to whether the terminal skips the PDCCH MO within the first time interval includes:

[0288] The TDRA table indicates whether the terminal should skip the PDCCH MO within the first time interval. The TDRA table is pre-agreed or pre-allocated through dedicated RRC signaling and corresponds to the TDRA word field carried in the DCI.

[0289] Here, the base station implicitly indicates whether to skip PDCCH listening within the PDSCH repeated transmission resource by using a row or column of the TDRA table corresponding to the TDRA word field in the DCI.

[0290] For example, a base station can use RRC signaling to add an indication to the downlink TDRA table, such as adding a column 'I' to the downlink TDRA. This indication can be a single bit (0 or 1), and its specific meaning is shown in the table below.

[0291] 1 The terminal does not listen to the PDCCH during the PDSCH or PDSCH retransmission period. 0 The terminal listens to the PDCCH during the PDSCH or PDSCH retransmission time.

[0292] Among them, the row index of the downlink TDRA table can be indicated by the downlink TDRA field in the PDCCH. The advantage of this scheme is that the base station can flexibly configure whether the terminal needs to listen to the above PDCCH according to the service, and one bit can flexibly indicate any number of PDCCH MOs that the terminal needs to skip.

[0293] As an optional implementation, after indicating whether the terminal should skip the PDCCH MO within the first time interval, the method of this embodiment may further include:

[0294] If the terminal is instructed to skip the PDCCH MO within the first time interval, the PDSCH is transmitted on the resources occupied by the skipped PDCCH MO.

[0295] Optionally, the skipped PDCCH MO is the MO corresponding to the search space of the PDCCH that schedules the current PDSCH.

[0296] Optionally, the first time interval is the PDSCH transmission time.

[0297] It should be noted that the first time interval mentioned in the embodiments of the present invention is the PDSCH or the PDSCH retransmission time.

[0298] It should be noted that when instructing the terminal to skip PDCCH MOs within the first time interval, and the PDCCH MO containing the DCI that schedules the current PDSCH is within the first time interval, the skipped PDCCH MOs do not include the PDCCH MO containing the DCI that schedules the PDSCH; that is, the PDCCH MO containing the DCI that schedules the PDSCH is excluded and is not counted as one of the PDCCH MOs that the terminal needs to skip.

[0299] The downlink channel transmission method of this invention determines the transmission parameters of the Physical Downlink Shared Channel (PDSCH), wherein the transmission parameters include: the number of retransmissions N and the retransmission method, N≥1 and N is a positive integer; and the PDSCH is transmitted according to the transmission parameters, thereby reducing system overhead and transmission latency of XR services.

[0300] like Figure 10The diagram shown is a second flowchart of a downlink channel transmission method provided in an embodiment of the present invention, applied to a terminal, and includes:

[0301] Step 1001: Obtain the transmission parameters of the Physical Downlink Shared Channel (PDSCH); wherein the transmission parameters include: the number of retransmissions N and the retransmission method, N≥1, and N is a positive integer.

[0302] In this step, when the number of repeated transmissions N=1, it means that the base station only performs one PDSCH transmission.

[0303] Optionally, the transmission parameters further include: the starting symbol S of the starting time slot of the PDSCH transmission and the number of symbols L occupied by one PDSCH transmission.

[0304] Optionally, the number of repeated transmissions is the number of PDSCH repeated transmissions or the number of PDSCH repeated time slots.

[0305] It should be noted that if the base station adopts the slot-based PDSCH scheduling method, the number of repeated transmissions is the number of PDSCH repeated time slots; if the base station adopts the min-slot-based PDSCH scheduling method, the number of repeated transmissions is the number of PDSCH repeated transmissions.

[0306] The downlink channel transmission method of this invention obtains the transmission parameters of the Physical Downlink Shared Channel (PDSCH), wherein the transmission parameters include: the number of retransmissions N and the retransmission method, N≥1 and N is a positive integer. In this way, system overhead and transmission latency of XR services can be reduced, while also helping the terminal save power.

[0307] Optionally, the transmission parameters are pre-agreed or indicated by the base station.

[0308] Optionally, the retransmission method is based on the resource mapping method between the PDSCH retransmission and the Physical Downlink Control Channel Sense Opportunity (PDCCH MO).

[0309] Specifically, the resource mapping method includes one of the following:

[0310] Method 1: The symbols occupied by the PDSCH transmission or repeated PDSCH transmission do not include the symbols occupied by PDCCH MO;

[0311] Method 2: The symbols occupied by the PDSCH transmission or repeated PDSCH transmission include some or all of the symbols occupied by PDCCH MO.

[0312] Here, the aforementioned repeated PDSCH specifically refers to the PDSCH being transmitted more than once, that is, the case where the number of repeated transmissions N > 1; while the aforementioned PDSCH without the qualifier "repeated" specifically refers to the PDSCH being transmitted only once, that is, the case where the number of repeated transmissions N = 1.

[0313] As an optional implementation, the transmission parameters are indicated by the base station; method step 1001 of this embodiment of the invention may specifically include:

[0314] Receive the first signaling sent by the base station;

[0315] Based on the first signaling, the transmission parameters of PDSCH are obtained. The first signaling includes: higher layer signaling and / or physical layer dynamic signaling.

[0316] Further, the first signaling is physical layer dynamic signaling; obtaining the transmission parameters of the PDSCH based on the first signaling may include:

[0317] The number of repeated transmissions of the PDSCH is obtained based on the explicit or implicit indication of the physical layer dynamic instructions.

[0318] Optionally, the explicit indication of the physical layer dynamic instruction is the first word field included in the downlink control information (DCI), and the first word field is used to indicate the number of repeated transmissions of the PDSCH.

[0319] The implicit indication of the physical layer dynamic instruction is a TDRA table corresponding to the TDRA word field carried in the DCI, and the first preset row of the TDRA table is used to indicate the number of repeated transmissions of the PDSCH.

[0320] As an optional implementation, the method of this embodiment of the invention may further include:

[0321] Based on the transmission parameters, decode the first downlink data carried on the corresponding PDSCH.

[0322] As an optional implementation, the resource mapping method is method two; the method of this embodiment may further include:

[0323] If it is known that a collision has occurred between PDSCH and PDCCH transmissions on the symbols occupied by the PDCCH MO, and the colliding PDSCH and PDCCH are frequency-division multiplexed, then listen to the PDCCH on the corresponding PDCCH MO; or,

[0324] If it is known that a collision has occurred between a PDSCH transmission and a PDCCH transmission on a symbol occupied by a PDCCH MO, then listen for PDCCH on other PDCCH MOs other than the symbol occupied by the PDCCH MO that caused the collision.

[0325] Here, knowing that PDSCH and PDCCH transmissions collide on the symbols occupied by PDCCH MO, and that the collided PDSCH and PDCCH are frequency-division multiplexed, it means that when PDSCH transmission resources are mapped, PDCCH symbols are occupied, but PDCCH frequency domain resources are not occupied. That is, PDSCH and PDCCH are frequency-division multiplexed on the symbols occupied by PDCCH. This does not affect the terminal's detection of PDCCH on the corresponding PDCCH MO, nor does it reduce PDSCH performance.

[0326] If it is known that a collision has occurred between a PDSCH transmission and a PDCCH transmission on a symbol occupied by a PDCCH MO, the terminal listens for PDCCH on other PDCCH MOs besides the one occupied by the PDCCH MO that caused the collision. This indicates that the terminal does not listen for PDCCH on the aforementioned PDCCH MO that collided with the PDSCH.

[0327] As an optional implementation, the method of this embodiment of the invention may further include:

[0328] Based on the base station indication, determine whether to skip the PDCCH MO in the first time interval;

[0329] If the base station indicates that the PDCCH MO within the first time interval should not be skipped, then the PDCCH MO should be listened to within the first time interval.

[0330] If the base station indicates to skip the PDCCH MO in the first time interval, then listen for the PDCCH MO in other time intervals besides the first time interval.

[0331] Optionally, if the instruction is to skip the PDCCH MO within the first time interval, the skipped PDCCH MO is the MO corresponding to the search space of the PDCCH that schedules the current PDSCH.

[0332] As an optional implementation, determining whether to skip the PDCCH MO within the first time interval via base station indication includes:

[0333] Receive the second signaling sent by the base station;

[0334] Based on the second signaling, it is determined whether to skip the PDCCH MO within the first time interval, the second signaling including higher-layer signaling and / or physical layer dynamic signaling.

[0335] Optionally, the second signaling is physical layer dynamic signaling; the step of determining whether to skip the PDCCH MO within the first time interval based on the second signaling may specifically include:

[0336] Based on the explicit or implicit indication of the physical layer dynamic signaling, determine whether the PDSCH skips the PDCCH MO within the first time interval.

[0337] Optionally, the explicit indication of the physical layer dynamic instruction is a second word field included in the DCI, the second word field being used to indicate whether to skip the PDCCH MO within the first time interval;

[0338] The implicit indication of the physical layer dynamic instruction is a TDRA table corresponding to the TDRA word field carried in the DCI. The second preset row or the first preset column of the TDRA table is used to indicate whether to skip the PDCCH MO in the first time interval.

[0339] Optionally, the first time interval is the PDSCH transmission time.

[0340] It should be noted that the first time interval mentioned in the embodiments of the present invention is the PDSCH or the PDSCH retransmission time.

[0341] It should be noted that when instructing the terminal to skip PDCCH MOs within the first time interval, and the PDCCH MO containing the DCI that schedules the current PDSCH is within the first time interval, the skipped PDCCH MOs do not include the PDCCH MO containing the DCI that schedules the PDSCH; that is, the PDCCH MO containing the DCI that schedules the PDSCH is excluded and is not counted as one of the PDCCH MOs that the terminal needs to skip.

[0342] The downlink channel transmission method of this invention obtains the transmission parameters of the Physical Downlink Shared Channel (PDSCH), wherein the transmission parameters include: the number of retransmissions N and the retransmission method, N≥1 and N is a positive integer. In this way, system overhead and transmission latency of XR services can be reduced, while also helping the terminal save power.

[0343] like Figure 11 As shown, this embodiment of the invention also provides a downlink channel transmission device, including: a memory 1120, a transceiver 1100, and a processor 1110: the memory 1120 is used to store program instructions; the transceiver 1100 is used to transmit and receive data under the control of the processor 1110; the processor 1110 is used to read the program instructions in the memory 1120 and perform the following operations:

[0344] Determine the transmission parameters of the Physical Downlink Shared Channel (PDSCH), wherein the transmission parameters include: the number of retransmissions N and the retransmission method, where N≥1 and N is a positive integer;

[0345] According to the transmission parameters, the first downlink data carried on the PDSCH is transmitted.

[0346] Among them, Figure 11 In this context, the bus architecture can include any number of interconnected buses and bridges, specifically linking various circuits together, represented by one or more processors (processor 1110) and memory (memory 1120). The bus architecture can also link together various other circuits such as peripheral devices, voltage regulators, and power management circuits, which are well known in the art and therefore will not be described further herein. The bus interface provides an interface. The transceiver 1100 can be multiple elements, including transmitters and receivers, providing units for communicating with various other devices over transmission media, including wireless channels, wired channels, optical fibers, etc. The processor 1110 is responsible for managing the bus architecture and general processing, and the memory 1120 can store data used by the processor 1110 during operation.

[0347] The processor 1110 can be a central processing unit (CPU), an application-specific integrated circuit (ASIC), a field-programmable gate array (FPGA), or a complex programmable logic device (CPLD). The processor can also adopt a multi-core architecture.

[0348] Optionally, the retransmission method is based on the resource mapping method between the PDSCH retransmission and the Physical Downlink Control Channel Sense Opportunity (PDCCH MO).

[0349] Optionally, the resource mapping method includes one of the following:

[0350] Method 1: The symbols occupied by the PDSCH transmission or repeated PDSCH transmission do not include the symbols occupied by PDCCH MO;

[0351] Method 2: The symbols occupied by the PDSCH transmission or repeated PDSCH transmission include some or all of the symbols occupied by PDCCH MO.

[0352] Optionally, the resource mapping method is method two; the processor 1110 specifically includes:

[0353] When a PDSCH transmission and a PDCCH transmission collide on a symbol occupied by the PDCCH MO, a puncturing operation is performed on the PDSCH that is colliding.

[0354] Optionally, the resource mapping method is method two, and the processor 1110 specifically includes:

[0355] When a collision occurs between a PDSCH transmission and a PDCCH transmission on a symbol occupied by a PDCCH MO, the colliding PDSCH and PDCCH are frequency-division multiplexed, or...

[0356] The transceiver 1100 specifically includes:

[0357] Transmit the second downlink data carried on the PDCCH on the available symbols other than the symbols occupied by the PDCCH MO that caused the collision.

[0358] Optionally, the transmission parameters are pre-agreed or configured by the base station.

[0359] Optionally, the transmission parameters are configured by the base station; the processor 1110 specifically includes:

[0360] The transmission parameters of the PDSCH are indicated to the terminal through higher-layer signaling and / or physical layer dynamic signaling.

[0361] Optionally, the processor 1110 specifically includes:

[0362] When the PDSCH repetition type indicator is set to the first value, the number of PDSCH repetitions is semi-statically configured via Radio Resource Control (RRC) dedicated signaling.

[0363] When the PDSCH retransmission type indicator is the second value, the number of PDSCH retransmissions is configured via physical layer dynamic signaling; wherein, the PDSCH retransmission type indicator is configured by the base station via RRC signaling.

[0364] Optionally, the processor 1110 specifically includes:

[0365] When the PDSCH repetition type indication is the second value, the mapping type indication of PDSCH in the nominal repetition slot is configured by RRC dedicated signaling.

[0366] When the mapping type indicator is the third value, the nominal number of PDSCH repeat slots is equal to the actual number of repeat slots;

[0367] When the mapping type indicator is the fourth value, the nominal number of PDSCH repeat slots is less than or equal to the actual number of repeat slots.

[0368] Optionally, the processor 1110 specifically includes:

[0369] The number of times the PDSCH is repeatedly transmitted by the terminal is explicitly or implicitly indicated through physical layer dynamic signaling.

[0370] Optionally, the processor 1110 specifically includes:

[0371] The first word field included in the downlink control information (DCI) indicates the number of times the PDSCH is repeatedly transmitted by the terminal.

[0372] Optionally, the processor 1110 specifically includes: indicating the number of times the PDSCH is repeatedly transmitted by the terminal through a Time Domain Resource Allocation (TDRA) table, wherein the TDRA table is pre-agreed or pre-allocated through dedicated RRC signaling and corresponds to the TDRA word field carried in the DCI.

[0373] Optionally, the processor 1110 specifically includes:

[0374] Indicates whether the terminal should skip the PDCCH MO within the first time interval.

[0375] Optionally, the processor 1110 specifically includes: instructing the terminal whether to skip the PDCCH MO within a first time interval via higher-layer signaling and / or physical layer dynamic signaling.

[0376] Optionally, the processor 1110 specifically includes: explicitly or implicitly instructing the terminal whether to skip the PDCCH MO within the first time interval through physical layer dynamic signaling.

[0377] Optionally, the processor 1110 specifically includes:

[0378] The second word field included in DCI indicates whether the terminal skips the PDCCH MO within the first time interval.

[0379] Optionally, the processor 1110 specifically includes:

[0380] The TDRA table indicates whether the terminal should skip the PDCCH MO within the first time interval. The TDRA table is pre-agreed or pre-allocated through dedicated RRC signaling and corresponds to the TDRA word field carried in the DCI.

[0381] Optionally, the transceiver 1100 specifically includes:

[0382] If the terminal is instructed to skip the PDCCH MO within the first time interval, the PDSCH is transmitted on the resources occupied by the skipped PDCCH MO.

[0383] Optionally, the skipped PDCCH MO is the MO corresponding to the search space of the PDCCH that schedules the current PDSCH.

[0384] Optionally, the first time interval is the PDSCH transmission time.

[0385] Optionally, the transmission parameters may further include: the starting symbol of the starting time slot of the PDSCH transmission and the number of symbols occupied by one PDSCH transmission.

[0386] Optionally, the number of repeated transmissions is the number of PDSCH repeated transmissions or the number of PDSCH repeated time slots.

[0387] The downlink channel transmission device of this invention obtains the transmission parameters of the Physical Downlink Shared Channel (PDSCH), wherein the transmission parameters include: the number of retransmissions N and the retransmission method, N≥1 and N is a positive integer. In this way, system overhead and transmission latency of XR services can be reduced, and the terminal can save power.

[0388] It should be noted that the apparatus provided in this embodiment of the invention can implement all the method steps implemented in the above method embodiment and can achieve the same technical effect. Therefore, the parts and beneficial effects that are the same as those in the method embodiment will not be described in detail here.

[0389] like Figure 12 As shown, this invention also provides a downlink channel transmission apparatus, comprising:

[0390] The parameter determination module 1201 is used to determine the transmission parameters of the Physical Downlink Shared Channel (PDSCH), wherein the transmission parameters include: the number of repetitions N and the repetition mode, where N≥1 and N is a positive integer;

[0391] The first transmission module 1202 is used to transmit the first downlink data carried on the PDSCH according to the transmission parameters.

[0392] Optionally, the retransmission method is based on the resource mapping method between the PDSCH retransmission and the Physical Downlink Control Channel Sense Opportunity (PDCCH MO).

[0393] Optionally, the resource mapping method includes one of the following:

[0394] Method 1: The symbols occupied by the PDSCH transmission or repeated PDSCH transmission do not include the symbols occupied by PDCCH MO;

[0395] Method 2: The symbols occupied by the PDSCH transmission or repeated PDSCH transmission include some or all of the symbols occupied by PDCCH MO.

[0396] Optionally, the resource mapping method is method two; the device further includes:

[0397] The first processing module is used to perform a puncturing operation on the PDSCH that is colliding with the PDCCH when the PDSCH transmission and the PDCCH transmission collide on the symbol occupied by the PDCCH MO.

[0398] Optionally, the resource mapping method is method two, and the device further includes:

[0399] The second processing module is used to frequency-division multiplex the colliding PDSCH and PDCCH when a collision occurs between PDSCH and PDCCH transmissions on the symbols occupied by PDCCH MO, or to transmit the second downlink data carried on PDCCH on other available symbols other than the symbols occupied by the colliding PDCCH MO.

[0400] Optionally, the transmission parameters are pre-agreed or configured by the base station.

[0401] Optionally, the transmission parameters are configured by the base station; the device further includes:

[0402] The first indication module is used to indicate the transmission parameters of the PDSCH of the terminal through higher-layer signaling and / or physical layer dynamic signaling.

[0403] Optionally, the first indication module includes:

[0404] The first configuration unit is used to semi-statically configure the number of PDSCH repetitions via Radio Resource Control (RRC) dedicated signaling when the PDSCH repetition type indication is a first value.

[0405] The second configuration unit is used to configure the number of PDSCH retransmissions via physical layer dynamic signaling when the PDSCH retransmission type indication is a second value; wherein the PDSCH retransmission type indication is configured by the base station via RRC signaling.

[0406] Optionally, the first indication module includes:

[0407] The first indication unit is used to explicitly or implicitly indicate the number of times the PDSCH is repeatedly transmitted by the terminal through physical layer dynamic signaling.

[0408] Optionally, the first indicating unit is specifically used for:

[0409] The first word field included in the downlink control information (DCI) indicates the number of times the PDSCH is repeatedly transmitted by the terminal.

[0410] Optionally, the first indicating unit is specifically used for:

[0411] The Time Domain Resource Allocation (TDRA) table indicates the number of times the PDSCH is repeatedly transmitted by the terminal. The TDRA table is pre-agreed or pre-allocated through dedicated RRC signaling and corresponds to the TDRA word field carried in the DCI.

[0412] Optionally, the device further includes:

[0413] The second indication module is used to indicate whether the terminal skips the PDCCH MO within the first time interval.

[0414] Optionally, the second indicating module includes:

[0415] The first indication submodule is used to indicate whether the terminal skips the PDCCH MO within the first time interval through higher-layer signaling and / or physical layer dynamic signaling.

[0416] Optionally, the first indication submodule includes:

[0417] The second indication unit is used to explicitly or implicitly indicate whether the terminal skips the PDCCH MO within the first time interval through physical layer dynamic signaling.

[0418] Optionally, the second indicating unit is specifically used for:

[0419] The second word field included in DCI indicates whether the terminal skips the PDCCH MO within the first time interval.

[0420] Optionally, the second indicating unit is specifically used for:

[0421] The TDRA table indicates whether the terminal should skip the PDCCH MO within the first time interval. The TDRA table is pre-agreed or pre-allocated through dedicated RRC signaling and corresponds to the TDRA word field carried in the DCI.

[0422] Optionally, the device further includes:

[0423] The second transmission module is used to transmit PDSCH on the resources occupied by the skipped PDCCH MO when instructing the terminal to skip the PDCCH MO within the first time interval.

[0424] Optionally, the skipped PDCCH MO is the MO corresponding to the search space of the PDCCH that schedules the current PDSCH.

[0425] Optionally, the first time interval is the PDSCH transmission time.

[0426] Optionally, the transmission parameters may further include: the starting symbol of the starting time slot of the PDSCH transmission and the number of symbols occupied by one PDSCH transmission.

[0427] Optionally, the number of repeated transmissions is the number of PDSCH repeated transmissions or the number of PDSCH repeated time slots.

[0428] The downlink channel transmission device of this invention obtains the transmission parameters of the Physical Downlink Shared Channel (PDSCH), wherein the transmission parameters include: the number of retransmissions N and the retransmission method, N≥1 and N is a positive integer. In this way, system overhead and transmission latency of XR services can be reduced, and the terminal can save power.

[0429] It should be noted that the division of units in the embodiments of this application is illustrative and only represents one logical functional division. In actual implementation, other division methods may be used. Furthermore, the functional units in the various embodiments of this application can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit. The integrated units described above can be implemented in hardware or as software functional units.

[0430] If the integrated unit is implemented as a software functional unit and sold or used as an independent product, it can be stored in a processor-readable storage medium. Based on this understanding, the technical solution of this application, in essence, or the part that contributes to the prior art, or all or part of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) or processor to execute all or part of the steps of the methods described in the various embodiments of this application. The aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, portable hard drives, read-only memory (ROM), random access memory (RAM), magnetic disks, or optical disks.

[0431] It should be noted that the apparatus provided in this embodiment of the invention can implement all the method steps implemented in the above method embodiment and can achieve the same technical effect. Therefore, the parts and beneficial effects that are the same as those in the method embodiment will not be described in detail here.

[0432] In some embodiments of the present invention, a processor-readable storage medium is also provided, the processor-readable storage medium storing program instructions for causing the processor to perform the following steps:

[0433] Determine the transmission parameters of the Physical Downlink Shared Channel (PDSCH), wherein the transmission parameters include: the number of retransmissions N and the retransmission method, where N≥1 and N is a positive integer;

[0434] According to the transmission parameters, the first downlink data carried on the PDSCH is transmitted.

[0435] When this program instruction is executed by the processor, it can achieve the above-mentioned applications, such as... Figure 2 All implementations of the base station-side method embodiments shown are not described again here to avoid repetition.

[0436] like Figure 13 As shown, this embodiment of the invention also provides a downlink channel transmission device, including: a memory 1320, a transceiver 1300, and a processor 1310: the memory 1320 is used to store program instructions; the transceiver 1300 is used to transmit and receive data under the control of the processor 1310; the processor 1310 is used to read the program instructions in the memory 1320 and perform the following operations:

[0437] Obtain the transmission parameters of the Physical Downlink Shared Channel (PDSCH); wherein the transmission parameters include: the number of retransmissions N and the retransmission method, N≥1, and N is a positive integer.

[0438] Among them, Figure 13 In this context, the bus architecture can include any number of interconnected buses and bridges, specifically linking various circuits of one or more processors represented by processor 1310 and memory represented by memory 1320 together. The bus architecture can also link various other circuits such as peripheral devices, voltage regulators, and power management circuits, which are well known in the art and therefore will not be described further herein. The bus interface provides an interface. The transceiver 1300 can be multiple components, including transmitters and receivers, providing a unit for communicating with various other devices over a transmission medium, including wireless channels, wired channels, optical fibers, etc. For different user equipment, the user interface 1330 can also be an interface capable of connecting external or internal devices, including but not limited to keypads, displays, speakers, microphones, joysticks, etc.

[0439] The processor 1310 is responsible for managing the bus architecture and general processing, and the memory 1320 can store the data used by the processor 1310 when performing operations.

[0440] Optionally, the processor 1310 can be a CPU (Central Processing Unit), ASIC (Application Specific Integrated Circuit), FPGA (Field-Programmable Gate Array), or CPLD (Complex Programmable Logic Device), and the processor 1310 can also adopt a multi-core architecture.

[0441] The processor 1310 executes any of the methods described in the embodiments of this application by calling program instructions stored in the memory, according to the obtained executable instructions. The processor 1310 and the memory 1320 may also be physically separated.

[0442] Optionally, the transmission parameters are pre-agreed or indicated by the base station.

[0443] Optionally, the retransmission method is based on the resource mapping method between the PDSCH retransmission and the Physical Downlink Control Channel Sense Opportunity (PDCCH MO).

[0444] Optionally, the resource mapping method includes one of the following:

[0445] Method 1: The symbols occupied by the PDSCH transmission or repeated PDSCH transmission do not include the symbols occupied by PDCCH MO;

[0446] Method 2: The symbols occupied by the PDSCH transmission or repeated PDSCH transmission include some or all of the symbols occupied by PDCCH MO.

[0447] Optionally, the transmission parameters are indicated by the base station; the transceiver 1300 specifically includes:

[0448] Receive the first signaling sent by the base station;

[0449] The processor specifically includes:

[0450] Based on the first signaling, the transmission parameters of PDSCH are obtained. The first signaling includes: higher layer signaling and / or physical layer dynamic signaling.

[0451] Optionally, the first signaling is physical layer dynamic signaling; the processor 1310 specifically includes:

[0452] The number of repeated transmissions of the PDSCH is obtained based on the explicit or implicit indication of the physical layer dynamic instructions.

[0453] Optionally, the explicit indication of the physical layer dynamic instruction is the first word field included in the downlink control information (DCI), and the first word field is used to indicate the number of repeated transmissions of the PDSCH.

[0454] The implicit indication of the physical layer dynamic instruction is a TDRA table corresponding to the TDRA word field carried in the DCI, and the first preset row of the TDRA table is used to indicate the number of repeated transmissions of the PDSCH.

[0455] Optionally, the processor 1310 specifically includes:

[0456] Based on the transmission parameters, decode the first downlink data carried on the corresponding PDSCH.

[0457] Optionally, the resource mapping method is method two; the processor 1310 specifically includes:

[0458] If it is known that a collision has occurred between PDSCH and PDCCH transmissions on the symbols occupied by the PDCCH MO, and the colliding PDSCH and PDCCH are frequency-division multiplexed, then listen to the PDCCH on the corresponding PDCCH MO; or,

[0459] If it is known that a collision has occurred between a PDSCH transmission and a PDCCH transmission on a symbol occupied by a PDCCH MO, then listen for PDCCH on other PDCCH MOs other than the symbol occupied by the PDCCH MO that caused the collision.

[0460] Optionally, the processor 1310 specifically includes:

[0461] Based on the base station indication, determine whether to skip the PDCCH MO in the first time interval;

[0462] If the base station indicates that the PDCCH MO within the first time interval should not be skipped, then the PDCCH MO should be listened to within the first time interval.

[0463] If the base station indicates to skip the PDCCH MO in the first time interval, then listen for the PDCCH MO in other time intervals besides the first time interval.

[0464] Optionally, if the instruction is to skip the PDCCH MO within the first time interval, the skipped PDCCH MO is the MO corresponding to the search space of the PDCCH that schedules the current PDSCH.

[0465] Optionally, the transceiver 1300 specifically includes:

[0466] Receive the second signaling sent by the base station;

[0467] The processor specifically includes:

[0468] Based on the second signaling, it is determined whether to skip the PDCCH MO within the first time interval, the second signaling including higher-layer signaling and / or physical layer dynamic signaling.

[0469] Optionally, the second signaling is physical layer dynamic signaling;

[0470] The processor 1310 specifically includes: determining whether the PDSCH skips the PDCCH MO within the first time interval based on the explicit or implicit indication of the physical layer dynamic signaling.

[0471] Optionally, the explicit indication of the physical layer dynamic instruction is a second word field included in the DCI, the second word field being used to indicate whether to skip the PDCCH MO within the first time interval;

[0472] The implicit indication of the physical layer dynamic instruction is a TDRA table corresponding to the TDRA word field carried in the DCI. The second preset row or the first preset column of the TDRA table is used to indicate whether to skip the PDCCH MO in the first time interval.

[0473] Optionally, the first time interval is the PDSCH transmission time.

[0474] Optionally, the transmission parameters may further include: the starting symbol of the starting time slot of the PDSCH transmission and the number of symbols occupied by one PDSCH transmission.

[0475] Optionally, the number of repeated transmissions is the number of PDSCH repeated transmissions or the number of PDSCH repeated time slots.

[0476] The downlink channel transmission device of this invention obtains the transmission parameters of the Physical Downlink Shared Channel (PDSCH), wherein the transmission parameters include: the number of retransmissions N and the retransmission method, N≥1 and N is a positive integer. In this way, system overhead and transmission latency of XR services can be reduced, and the terminal can save power.

[0477] It should be noted that the apparatus provided in this embodiment of the invention can implement all the method steps implemented in the above method embodiment and can achieve the same technical effect. Therefore, the parts and beneficial effects that are the same as those in the method embodiment will not be described in detail here.

[0478] like Figure 14 As shown, this embodiment of the invention also provides a downlink channel transmission apparatus, including:

[0479] The acquisition module 1400 is used to acquire the transmission parameters of the Physical Downlink Shared Channel (PDSCH); wherein, the transmission parameters include: the number of retransmissions N and the retransmission method, N≥1, and N is a positive integer.

[0480] Optionally, the transmission parameters are pre-agreed or indicated by the base station.

[0481] Optionally, the retransmission method is based on the resource mapping method between the PDSCH retransmission and the Physical Downlink Control Channel Sense Opportunity (PDCCH MO).

[0482] Optionally, the resource mapping method includes one of the following:

[0483] Method 1: The symbols occupied by the PDSCH transmission or repeated PDSCH transmission do not include the symbols occupied by PDCCH MO;

[0484] Method 2: The symbols occupied by the PDSCH transmission or repeated PDSCH transmission include some or all of the symbols occupied by PDCCH MO.

[0485] Optionally, the transmission parameters are indicated by the base station; the acquisition module includes:

[0486] The first receiving unit is used to receive the first signaling sent by the base station;

[0487] The first acquisition unit is used to obtain the transmission parameters of PDSCH according to the first signaling, wherein the first signaling includes: higher layer signaling and / or physical layer dynamic signaling.

[0488] Optionally, the first signaling is physical layer dynamic signaling; the first acquisition unit is specifically used for:

[0489] The number of repeated transmissions of the PDSCH is obtained based on the explicit or implicit indication of the physical layer dynamic instructions.

[0490] Optionally, the explicit indication of the physical layer dynamic instruction is the first word field included in the downlink control information (DCI), and the first word field is used to indicate the number of repeated transmissions of the PDSCH.

[0491] The implicit indication of the physical layer dynamic instruction is a TDRA table corresponding to the TDRA word field carried in the DCI, and the first preset row of the TDRA table is used to indicate the number of repeated transmissions of the PDSCH.

[0492] Optionally, the device further includes:

[0493] The decoding module is used to decode the first downlink data carried on the corresponding PDSCH according to the transmission parameters.

[0494] Optionally, the resource mapping method is method two; the device further includes:

[0495] The first monitoring module is used to monitor the PDCCH on the corresponding PDCCH MO when it is known that a collision has occurred between PDSCH and PDCCH transmissions on the symbols occupied by PDCCH MO, and the colliding PDSCH and PDCCH are frequency-division multiplexed; or,

[0496] If it is known that a collision has occurred between a PDSCH transmission and a PDCCH transmission on a symbol occupied by a PDCCH MO, then listen for PDCCH on other PDCCH MOs other than the symbol occupied by the PDCCH MO that caused the collision.

[0497] Optionally, the device further includes:

[0498] The determining module is used to determine, based on the base station indication, whether to skip the PDCCH MO within the first time interval;

[0499] The second monitoring module is used to monitor the PDCCH MO within the first time interval when the base station indicates that the PDCCH MO within the first time interval should not be skipped;

[0500] The third monitoring module is used to monitor PDCCH MO in time intervals other than the first time interval when the base station indicates to skip the PDCCH MO in the first time interval.

[0501] Optionally, if the instruction is to skip the PDCCH MO within the first time interval, the skipped PDCCH MO is the MO corresponding to the search space of the PDCCH that schedules the current PDSCH.

[0502] Optionally, the determining module includes:

[0503] The second receiving unit is used to receive the second signaling sent by the base station;

[0504] The first determining unit is configured to determine, based on the second signaling, whether to skip the PDCCHMO within the first time interval, wherein the second signaling includes higher-layer signaling and / or physical layer dynamic signaling.

[0505] Optionally, the second signaling is physical layer dynamic signaling; the first determining unit is specifically used for:

[0506] Based on the explicit or implicit indication of the physical layer dynamic signaling, determine whether the PDSCH skips the PDCCH MO within the first time interval.

[0507] Optionally, the explicit indication of the physical layer dynamic instruction is a second word field included in the DCI, the second word field being used to indicate whether to skip the PDCCH MO within the first time interval;

[0508] The implicit indication of the physical layer dynamic instruction is a TDRA table corresponding to the TDRA word field carried in the DCI. The second preset row or the first preset column of the TDRA table is used to indicate whether to skip the PDCCH MO in the first time interval.

[0509] Optionally, the first time interval is the PDSCH transmission time.

[0510] Optionally, the transmission parameters may further include: the starting symbol of the starting time slot of the PDSCH transmission and the number of symbols occupied by one PDSCH transmission.

[0511] Optionally, the number of repeated transmissions is the number of PDSCH repeated transmissions or the number of PDSCH repeated time slots.

[0512] The downlink channel transmission device of this invention obtains the transmission parameters of the Physical Downlink Shared Channel (PDSCH), wherein the transmission parameters include: the number of retransmissions N and the retransmission method, N≥1 and N is a positive integer. In this way, system overhead and transmission latency of XR services can be reduced, and the terminal can save power.

[0513] It should be noted that the division of units in the embodiments of this application is illustrative and only represents one logical functional division. In actual implementation, other division methods may be used. Furthermore, the functional units in the various embodiments of this application can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit. The integrated units described above can be implemented in hardware or as software functional units.

[0514] If the integrated unit is implemented as a software functional unit and sold or used as an independent product, it can be stored in a processor-readable storage medium. Based on this understanding, the technical solution of this application, in essence, or the part that contributes to the prior art, or all or part of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) or processor to execute all or part of the steps of the methods described in the various embodiments of this application. The aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, portable hard drives, read-only memory (ROM), random access memory (RAM), magnetic disks, or optical disks.

[0515] It should be noted that the apparatus provided in this embodiment of the invention can implement all the method steps implemented in the above method embodiment and can achieve the same technical effect. Therefore, the parts and beneficial effects that are the same as those in the method embodiment will not be described in detail here.

[0516] In some embodiments of the present invention, a processor-readable storage medium is also provided, the processor-readable storage medium storing program instructions for causing the processor to perform the following steps:

[0517] Obtain the transmission parameters of the Physical Downlink Shared Channel (PDSCH); wherein the transmission parameters include: the number of retransmissions N and the retransmission method, N≥1, and N is a positive integer.

[0518] When this program instruction is executed by the processor, it can achieve the above-mentioned applications, such as... Figure 10 All implementation methods shown in the terminal-side method embodiments will not be described again here to avoid repetition.

[0519] The technical solutions provided in this application can be applied to various systems, especially 5G systems. For example, applicable systems include Global System for Mobile communication (GSM), Code Division Multiple Access (CDMA), Wideband Code Division Multiple Access (WCDMA) General Packet Radio Service (GPRS), Long Term Evolution (LTE), LTE Frequency Division Duplex (FDD), LTE Time Division Duplex (TDD), Long Term Evolution Advanced (LTE-A), Universal Mobile Telecommunication System (UMTS), Worldwide Interoperability for Microwave Access (WiMAX), and 5G New Radio (NR). All of these systems include terminal equipment and network equipment. The system may also include a core network component, such as the Evolved Packet System (EPS) or the 5G system (5GS).

[0520] The terminal devices involved in the embodiments of this application can be devices that provide voice and / or data connectivity to users, handheld devices with wireless connectivity, or other processing devices connected to a wireless modem. The names of the terminal devices may differ in different systems; for example, in a 5G system, a terminal device can be called User Equipment (UE). Wireless terminal devices can communicate with one or more core networks (CNs) via a Radio Access Network (RAN). Wireless terminal devices can be mobile terminal devices, such as mobile phones (or "cellular" phones) and computers with mobile terminal devices, for example, portable, pocket-sized, handheld, computer-embedded, or vehicle-mounted mobile devices that exchange voice and / or data with the RAN. Examples include Personal Communication Service (PCS) phones, cordless phones, Session Initiated Protocol (SIP) phones, Wireless Local Loop (WLL) stations, and Personal Digital Assistants (PDAs). Wireless terminal equipment can also be referred to as a system, subscriber unit, subscriber station, mobile station, mobile station, remote station, access point, remote terminal, access terminal, user terminal, user agent, or user device, but is not limited to these terms in the embodiments of this application.

[0521] The network device involved in this application embodiment can be a base station, which may include multiple cells providing services to terminals. Depending on the specific application, a base station may also be called an access point, or a device in an access network that communicates with a wireless terminal device through one or more sectors on the air interface, or other names. The network device can be used to exchange received air frames with Internet Protocol (IP) packets, acting as a router between the wireless terminal device and the rest of the access network, where the rest of the access network may include an Internet Protocol (IP) communication network. The network device can also coordinate the attribute management of the air interface. For example, the network equipment involved in the embodiments of this application can be a base transceiver station (BTS) in a Global System for Mobile communications (GSM) or Code Division Multiple Access (CDMA) system, a 5G base station (gNB) in a next-generation 5G network architecture, an evolved Node B (eNB or e-NodeB) in a Long Term Evolution (LTE) system, a Home evolved Node B (HeNB), a relay node, a femto, a pico, etc., and is not limited in the embodiments of this application. In some network structures, the network equipment may include centralized unit (CU) nodes and distributed unit (DU) nodes, and the centralized unit and distributed unit may be geographically separated.

[0522] Network devices and terminal devices can each use one or more antennas for multiple-input multiple-output (MIMO) transmission. MIMO transmission can be single-user MIMO (SU-MIMO) or multiple-user MIMO (MU-MIMO). Depending on the configuration and number of antenna combinations, MIMO transmission can be 2D-MIMO, 3D-MIMO, FD-MIMO, or massive-MIMO, and can also be diversity transmission, precoding transmission, or beamforming transmission, etc.

[0523] Those skilled in the art will understand that embodiments of this application can be provided as methods, systems, or computer program products. Therefore, this application can take the form of a completely hardware embodiment, a completely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, this application can take the form of a computer program product implemented on one or more computer-usable storage media (including, but not limited to, disk storage and optical storage) containing computer-usable program code.

[0524] This application is described with reference to flowchart illustrations and / or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of this application. It will be understood that each block of the flowchart illustrations and / or block diagrams, and combinations of blocks in the flowchart illustrations and / or block diagrams, can be implemented by computer-executable instructions. These computer-executable instructions can be provided to a processor of a general-purpose computer, special-purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, generate instructions for implementing the flowchart... Figure 1 One or more processes and / or boxes Figure 1 A device that provides the functions specified in one or more boxes.

[0525] These processor-executable instructions may also be stored in a processor-readable memory that can direct a computer or other programmable data processing device to operate in a particular manner, such that the instructions stored in the processor-readable memory produce an article of manufacture including instruction means, which are implemented in a process Figure 1 One or more processes and / or boxes Figure 1 The function specified in one or more boxes.

[0526] These processors can execute instructions that can also be loaded onto a computer or other programmable data processing device, causing a series of operational steps to be performed on the computer or other programmable device to produce a computer-implemented process, thereby providing instructions that execute on the computer or other programmable device for implementing the process. Figure 1One or more processes and / or boxes Figure 1 The steps of the function specified in one or more boxes.

[0527] Obviously, those skilled in the art can make various modifications and variations to this application without departing from the spirit and scope of this application. Therefore, if such modifications and variations fall within the scope of the claims of this application and their equivalents, this application also intends to include such modifications and variations.

Claims

1. A downlink channel transmission method, applied to a base station, characterized in that, include: Determine the transmission parameters of the Physical Downlink Shared Channel (PDSCH), wherein the transmission parameters include: the number of retransmissions N and the retransmission method, where N≥1 and N is a positive integer; According to the transmission parameters, the first downlink data carried on the PDSCH is transmitted; The method further includes: Indicates whether the terminal should skip the PDCCH MO within a first time interval, where the first time interval is the PDSCH retransmission time.

2. The method according to claim 1, characterized in that, The repetitive transmission method is based on the resource mapping between the PDSCH repetitive transmission and the Physical Downlink Control Channel Listening Opportunity (PDCCH MO).

3. The method according to claim 2, characterized in that, The resource mapping method includes one of the following: Method 1: The symbols occupied by the PDSCH transmission or repeated PDSCH transmission do not include the symbols occupied by PDCCH MO; Method 2: The symbols occupied by the PDSCH transmission or repeated PDSCH transmission include some or all of the symbols occupied by PDCCH MO.

4. The method according to claim 3, characterized in that, The resource mapping method is method two; the method also includes: When a PDSCH transmission and a PDCCH transmission collide on a symbol occupied by the PDCCH MO, a puncturing operation is performed on the PDSCH that is colliding.

5. The method according to claim 3, characterized in that, The resource mapping method is method two, and the method further includes: When a PDSCH transmission and a PDCCH transmission collide on a symbol occupied by a PDCCH MO, the colliding PDSCH and PDCCH are frequency-division multiplexed, or the second downlink data carried on the PDCCH is transmitted on other available symbols other than the symbol occupied by the colliding PDCCH MO.

6. The method according to claim 1, characterized in that, The transmission parameters are either pre-agreed or configured by the base station.

7. The method according to claim 6, characterized in that, When the transmission parameters are configured by the base station; After determining the transmission parameters of the PDSCH, the method further includes: The transmission parameters of the PDSCH are indicated to the terminal through higher-layer signaling and / or physical layer dynamic signaling.

8. The method according to claim 7, characterized in that, The transmission parameters for the PDSCH transmission by the terminal, indicated by higher-layer signaling and / or physical layer dynamic signaling, include: When the PDSCH repetition type indicator is set to the first value, the number of PDSCH repetitions is semi-statically configured via Radio Resource Control (RRC) dedicated signaling. When the PDSCH retransmission type indicator is the second value, the number of PDSCH retransmissions is configured via physical layer dynamic signaling; wherein, the PDSCH retransmission type indicator is configured by the base station via RRC signaling.

9. The method according to claim 8, characterized in that, The method further includes: When the PDSCH repetition type indication is the second value, the mapping type indication of PDSCH in the nominal repetition slot is configured by RRC dedicated signaling. When the mapping type indicator is the third value, the nominal number of PDSCH repeat slots is equal to the actual number of repeat slots; When the mapping type indicator is the fourth value, the nominal number of PDSCH repeat slots is less than or equal to the actual number of repeat slots.

10. The method according to claim 7, characterized in that, The method of instructing the terminal on the transmission parameters of the PDSCH via physical layer dynamic signaling includes: The number of times the PDSCH is repeatedly transmitted by the terminal is explicitly or implicitly indicated through physical layer dynamic signaling.

11. The method according to claim 10, characterized in that, The method of explicitly instructing the terminal to repeat the PDSCH transmission number via physical layer dynamic signaling includes: The first word field included in the downlink control information (DCI) indicates the number of times the PDSCH is repeatedly transmitted by the terminal.

12. The method according to claim 10, characterized in that, The method of implicitly indicating the number of times the PDSCH is repeatedly transmitted by the terminal through physical layer dynamic signaling includes: The Time Domain Resource Allocation (TDRA) table indicates the number of times the PDSCH is repeatedly transmitted by the terminal. The TDRA table is pre-agreed or pre-allocated through dedicated RRC signaling and corresponds to the TDRA word field carried in the DCI.

13. The method according to claim 1, characterized in that, The indication of whether the terminal skips the PDCCH MO within the first time interval includes: The terminal is instructed whether to skip the PDCCH MO within the first time interval via higher-layer signaling and / or physical-layer dynamic signaling.

14. The method according to claim 13, characterized in that, The step of instructing the terminal whether to skip the PDCCH MO within the first time interval via physical layer dynamic signaling includes: Through physical layer dynamic signaling, the terminal is explicitly or implicitly instructed whether to skip the PDCCH MO within the first time interval.

15. The method according to claim 14, characterized in that, The method of explicitly instructing the terminal whether to skip the PDCCH MO within the first time interval via physical layer dynamic signaling includes: The second word field included in DCI indicates whether the terminal skips the PDCCH MO within the first time interval.

16. The method according to claim 14, characterized in that, The implicit indication via physical layer dynamic signaling to whether the terminal skips the PDCCH MO within the first time interval includes: The TDRA table indicates whether the terminal should skip the PDCCH MO within the first time interval. The TDRA table is pre-agreed or pre-allocated through dedicated RRC signaling and corresponds to the TDRA word field carried in the DCI.

17. The method according to claim 1, characterized in that, After instructing the terminal whether to skip the PDCCH MO within the first time interval, the method further includes: If the terminal is instructed to skip the PDCCH MO within the first time interval, the PDSCH is transmitted on the resources occupied by the skipped PDCCH MO.

18. The method according to claim 17, characterized in that, The skipped PDCCH MO is the MO corresponding to the search space of the PDCCH that schedules the current PDSCH.

19. The method according to claim 1, characterized in that, The number of repeated transmissions refers to the number of PDSCH repeated transmissions or the number of PDSCH repeated time slots.

20. A downlink channel transmission method, applied to a terminal, characterized in that, include: Obtain the transmission parameters of the Physical Downlink Shared Channel (PDSCH); wherein, the transmission parameters include: the number of retransmissions N and the retransmission method, N≥1, and N is a positive integer; The method further includes: Based on the base station indication, determine whether to skip the PDCCH MO in the first time interval; If the base station indicates that the PDCCH MO within the first time interval should not be skipped, then the PDCCH MO should be monitored within the first time interval. If the base station indicates to skip the PDCCH MO within the first time interval, then listen to the PDCCH MO in other time intervals besides the first time interval, where the first time interval is the PDSCH retransmission time.

21. The method according to claim 20, characterized in that, The transmission parameters are either pre-agreed upon or indicated by the base station.

22. The method according to claim 20, characterized in that, The repetitive transmission method is based on the resource mapping between the PDSCH repetitive transmission and the Physical Downlink Control Channel Listening Opportunity (PDCCH MO).

23. The method according to claim 22, characterized in that, The resource mapping method includes one of the following: Method 1: The symbols occupied by the PDSCH transmission or repeated PDSCH transmission do not include the symbols occupied by PDCCH MO; Method 2: The symbols occupied by the PDSCH transmission or repeated PDSCH transmission include some or all of the symbols occupied by PDCCH MO.

24. The method according to claim 21, characterized in that, When the transmission parameters are indicated by the base station; The acquisition of transmission parameters for the Physical Downlink Shared Channel (PDSCH) includes: Receive the first signaling sent by the base station; Based on the first signaling, the transmission parameters of PDSCH are obtained. The first signaling includes: higher layer signaling and / or physical layer dynamic signaling.

25. The method according to claim 24, characterized in that, The first signaling is physical layer dynamic signaling; The step of obtaining the transmission parameters of PDSCH according to the first signaling includes: The number of repeated transmissions of the PDSCH is obtained based on the explicit or implicit indication of the physical layer dynamic instructions.

26. The method according to claim 25, characterized in that, The explicit indication of the physical layer dynamic instruction is the first word field included in the downlink control information (DCI), which is used to indicate the number of repeated transmissions of the PDSCH. The implicit indication of the physical layer dynamic instruction is a TDRA table corresponding to the TDRA word field carried in the DCI, and the first preset row of the TDRA table is used to indicate the number of repeated transmissions of the PDSCH.

27. The method according to claim 20, characterized in that, The method further includes: Based on the transmission parameters, decode the first downlink data carried on the corresponding PDSCH.

28. The method according to claim 23, characterized in that, The resource mapping method is method two; the method also includes: If it is known that a collision has occurred between PDSCH and PDCCH transmissions on the symbols occupied by the PDCCH MO, and the colliding PDSCH and PDCCH are frequency-division multiplexed, then listen to the PDCCH on the corresponding PDCCH MO; or, If it is known that a collision has occurred between a PDSCH transmission and a PDCCH transmission on a symbol occupied by a PDCCH MO, then listen for PDCCH on other PDCCH MOs other than the symbol occupied by the PDCCH MO that caused the collision.

29. The method according to claim 20, characterized in that, When it is indicated that the PDCCH MO within the first time interval is skipped, the skipped PDCCH MO is the MO corresponding to the search space of the PDCCH that schedules the current PDSCH.

30. The method according to claim 20, characterized in that, The step of determining whether to skip the PDCCH MO within the first time interval via base station indication includes: Receive the second signaling sent by the base station; Based on the second signaling, it is determined whether to skip the PDCCH MO within the first time interval, the second signaling including higher-layer signaling and / or physical layer dynamic signaling.

31. The method according to claim 30, characterized in that, The second signaling is physical layer dynamic signaling; The step of determining whether to skip the PDCCH MO within the first time interval according to the second signaling includes: Based on the explicit or implicit indication of the physical layer dynamic signaling, determine whether the PDSCH skips the PDCCH MO within the first time interval.

32. The method according to claim 31, characterized in that, The explicit indication of the physical layer dynamic instruction is the second word field included in the DCI, which is used to indicate whether to skip the PDCCH MO within the first time interval; The implicit indication of the physical layer dynamic instruction is a TDRA table corresponding to the TDRA word field carried in the DCI. The second preset row or the first preset column of the TDRA table is used to indicate whether to skip the PDCCH MO in the first time interval.

33. The method according to claim 20, characterized in that, The number of repeated transmissions refers to the number of PDSCH repeated transmissions or the number of PDSCH repeated time slots.

34. A downlink channel transmission apparatus, characterized in that, include: Memory, transceiver, processor: Memory is used to store program instructions; Transceiver, used to send and receive data under the control of the processor; Processor, configured to read program instructions from the memory and perform the following operations: Determine the transmission parameters of the Physical Downlink Shared Channel (PDSCH), wherein the transmission parameters include: the number of retransmissions N and the retransmission method, where N≥1 and N is a positive integer; According to the transmission parameters, the first downlink data carried on the PDSCH is transmitted; The processor specifically includes: Indicates whether the terminal should skip the PDCCH MO within a first time interval, where the first time interval is the PDSCH retransmission time.

35. The apparatus according to claim 34, characterized in that, The repetitive transmission method is based on the resource mapping between the PDSCH repetitive transmission and the Physical Downlink Control Channel Listening Opportunity (PDCCH MO).

36. The apparatus according to claim 35, characterized in that, The resource mapping method includes one of the following: Method 1: The symbols occupied by the PDSCH transmission or repeated PDSCH transmission do not include the symbols occupied by PDCCH MO; Method 2: The symbols occupied by the PDSCH transmission or repeated PDSCH transmission include some or all of the symbols occupied by PDCCH MO.

37. The apparatus according to claim 36, characterized in that, The resource mapping method is Method Two; the processor specifically includes: When a PDSCH transmission and a PDCCH transmission collide on a symbol occupied by the PDCCH MO, a puncturing operation is performed on the PDSCH that is colliding.

38. The apparatus according to claim 36, characterized in that, The resource mapping method is Method Two, and the processor specifically includes: When a collision occurs between a PDSCH transmission and a PDCCH transmission on a symbol occupied by a PDCCH MO, the colliding PDSCH and PDCCH are frequency-division multiplexed, or... The transceiver specifically includes: Transmit the second downlink data carried on the PDCCH on the available symbols other than the symbols occupied by the PDCCH MO that caused the collision.

39. The apparatus according to claim 34, characterized in that, The transmission parameters are either pre-agreed or configured by the base station.

40. The apparatus according to claim 39, characterized in that, When the transmission parameters are configured by the base station; the processor specifically includes: The transmission parameters of the PDSCH are indicated to the terminal through higher-layer signaling and / or physical layer dynamic signaling.

41. A downlink channel transmission apparatus, characterized in that, include: The parameter determination module is used to determine the transmission parameters of the Physical Downlink Shared Channel (PDSCH), wherein the transmission parameters include: the number of retransmissions N and the retransmission method, where N≥1 and N is a positive integer; The first transmission module is used to transmit the first downlink data carried on the PDSCH according to the transmission parameters. The device further includes: The second indication module is used to indicate whether the terminal skips the PDCCH MO within a first time interval, where the first time interval is the PDSCH retransmission time.

42. A downlink channel transmission apparatus, characterized in that, include: Memory, transceiver, processor: Memory is used to store program instructions; Transceiver, used to send and receive data under the control of the processor; Processor, configured to read program instructions from the memory and perform the following operations: Obtain the transmission parameters of the Physical Downlink Shared Channel (PDSCH); wherein, the transmission parameters include: the number of retransmissions N and the retransmission method, N≥1, and N is a positive integer; The processor specifically includes: Based on the base station indication, determine whether to skip the PDCCH MO in the first time interval; If the base station indicates that the PDCCH MO within the first time interval should not be skipped, then the PDCCH MO should be monitored within the first time interval. If the base station indicates to skip the PDCCH MO within the first time interval, then listen to the PDCCH MO in other time intervals besides the first time interval, where the first time interval is the PDSCH retransmission time.

43. The apparatus according to claim 42, characterized in that, The repetitive transmission method is based on the resource mapping between the PDSCH repetitive transmission and the Physical Downlink Control Channel Listening Opportunity (PDCCH MO).

44. The apparatus according to claim 43, characterized in that, The resource mapping method includes one of the following: Method 1: The symbols occupied by the PDSCH transmission or repeated PDSCH transmission do not include the symbols occupied by PDCCH MO; Method 2: The symbols occupied by the PDSCH transmission or repeated PDSCH transmission include some or all of the symbols occupied by PDCCH MO.

45. The apparatus according to claim 42, characterized in that, The processor specifically includes: Based on the transmission parameters, decode the first downlink data carried on the corresponding PDSCH.

46. ​​The apparatus according to claim 44, characterized in that, The resource mapping method is Method Two; the processor specifically includes: If it is known that a collision has occurred between PDSCH and PDCCH transmissions on the symbols occupied by the PDCCH MO, and the colliding PDSCH and PDCCH are frequency-division multiplexed, then listen to the PDCCH on the corresponding PDCCH MO; or, If it is known that a collision has occurred between a PDSCH transmission and a PDCCH transmission on a symbol occupied by a PDCCH MO, then listen for PDCCH on other PDCCH MOs other than the symbol occupied by the PDCCH MO that caused the collision.

47. A downlink channel transmission apparatus, characterized in that, include: The acquisition module is used to acquire the transmission parameters of the Physical Downlink Shared Channel (PDSCH); wherein, the transmission parameters include: the number of retransmissions N and the retransmission method, N≥1, and N is a positive integer; The device further includes: The determining module is used to determine, based on the base station indication, whether to skip the PDCCH MO within the first time interval; The second monitoring module is used to monitor the PDCCH MO within the first time interval when the base station indicates that the PDCCH MO within the first time interval should not be skipped; The third monitoring module is used to monitor the PDCCH MO in other time intervals besides the first time interval when the base station indicates to skip the PDCCH MO in the first time interval, wherein the first time interval is the PDCCH retransmission time.

48. A processor-readable storage medium, characterized in that, The processor-readable storage medium stores program instructions for causing the processor to perform the steps of the downlink channel transmission method according to any one of claims 1 to 19, or to perform the steps of the downlink channel transmission method according to any one of claims 20 to 33.

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