Channel transmission methods, network devices, terminals, and computer-readable storage media

Abstract

A method for transmitting a channel, a network device, a terminal, and a computer-readable storage medium, wherein a first physical broadcast channel is transmitted based on a first resource set; wherein the first resource set includes: at least one first resource, a first resource being the resource occupied by transmitting a physical broadcast channel once; the first physical broadcast channel being a retransmission of a second physical broadcast channel in a first synchronization signal block; the resource occupied by the second physical broadcast channel being a sub-resource; and at least one first resource being different from the second resource occupied by the synchronization signal block.

Description

Technical Field

[0001] This application relates to the field of communication technology, and in particular to a channel transmission method, network device, terminal, and computer-readable storage medium. Background Technology

[0002] New radio (NR) systems are primarily designed to meet the needs of high-speed, high-spectrum, and high-bandwidth services such as enhanced mobile broadband (eMBB). However, for other services with reduced bandwidth, relaxed processing time, and fewer antennas, the capabilities of terminals are relatively low, such as terminals in machine-type communication (MTC) and narrowband Internet of Things (NB-IoT), resulting in lower downlink coverage. Summary of the Invention

[0003] This application aims to provide a channel transmission method, network device, terminal, and computer-readable storage medium that enhances the downlink coverage of NR systems.

[0004] The technical solution of this application embodiment can be implemented as follows:

[0005] This application provides a channel transmission method applied to a network device, comprising: transmitting a first physical broadcast channel based on a first resource set; wherein the first resource set includes: at least one first resource, a first resource being the resource occupied by transmitting the physical broadcast channel once; the first physical broadcast channel being a retransmission of a second physical broadcast channel in a first synchronization signal block; the resource occupied by the second physical broadcast channel being a sub-resource; and the at least one first resource being different from the second resource occupied by the first synchronization signal block.

[0006] This application provides a channel transmission method applied to a terminal, comprising: receiving a first physical broadcast channel based on a first resource set; wherein the first resource set includes: at least one first resource, a first resource being the resource occupied by receiving the physical broadcast channel once; the first physical broadcast channel being a retransmission of a second physical broadcast channel in a first synchronization signal block; the resource occupied by the second physical broadcast channel being a sub-resource; and the at least one first resource being different from the second resource occupied by the first synchronization signal block.

[0007] This application provides a network device, including:

[0008] The sending module is used to send a first physical broadcast channel based on a first resource set; wherein,

[0009] The first resource set includes: at least one first resource, wherein the first resource is the resource occupied by transmitting the physical broadcast channel once; the first physical broadcast channel is a retransmission of the second physical broadcast channel in the first synchronization signal block; the resource occupied by the second physical broadcast channel is a sub-resource; and the at least one first resource is different from the second resource occupied by the first synchronization signal block.

[0010] This application provides a terminal, including:

[0011] The receiving module is configured to receive a first physical broadcast channel based on a first resource set; wherein,

[0012] The first resource set includes: at least one first resource, wherein the first resource is the resource occupied by receiving the physical broadcast channel once; the first physical broadcast channel is a retransmission of the second physical broadcast channel in the first synchronization signal block; the resource occupied by the second physical broadcast channel is a sub-resource; and the at least one first resource is different from the second resource occupied by the first synchronization signal block.

[0013] This application provides a network device, including: a first processor and a first memory for storing computer programs capable of running on the first processor.

[0014] Wherein, when the first processor is used to run the computer program, it executes the steps of the above-described network device side channel transmission method.

[0015] This application provides a terminal, including: a second processor and a second memory for storing computer programs capable of running on the second processor.

[0016] When the second processor runs the computer program, it executes the steps of the above-described terminal-side channel transmission method.

[0017] This application provides a computer-readable storage medium for use in a network device, which stores a computer program. When the computer program is executed by one or more first processors, the first processors execute the aforementioned network device side-channel transmission method.

[0018] This application provides a computer-readable storage medium applied to a terminal, which stores a computer program. When the computer program is executed by one or more second processors, the second processors execute the aforementioned terminal-side channel transmission method.

[0019] This application provides a channel transmission method, network device, terminal, and computer-readable storage medium. The network device transmits a first physical broadcast channel based on a first resource set. The first resource set includes at least one first resource, which is the resource occupied by transmitting a physical broadcast channel once. The first physical broadcast channel is a retransmission of a second physical broadcast channel in a first synchronization signal block. The resource occupied by the second physical broadcast channel is a sub-resource. At least one first resource is different from the second resource occupied by the synchronization signal block. That is, the network device retransmits the physical broadcast channel at least once based on the first resource set, so that the terminal can receive at least one physical broadcast channel, thereby enhancing the downlink coverage of the NR system. Attached Figure Description

[0020] Figure 1 A block diagram of a communication system provided in an embodiment of this application;

[0021] Figure 2 A time-frequency structure diagram of a synchronization signal block provided in an embodiment of this application;

[0022] Figure 3 A schematic diagram of the time slot distribution of a synchronization signal block provided in an embodiment of this application;

[0023] Figure 4 A schematic diagram illustrating the distribution of synchronization signal blocks within a time slot, provided as an embodiment of this application;

[0024] Figure 5 A schematic diagram of the distribution of a first resource provided in an embodiment of this application. Figure 1 ;

[0025] Figure 6 A schematic diagram of the distribution of a first resource provided in an embodiment of this application. Figure 2 ;

[0026] Figure 7 A schematic diagram of the distribution of a first resource provided in an embodiment of this application. Figure 3 ;

[0027] Figure 8 A schematic diagram of the distribution of a first resource provided in an embodiment of this application. Figure 4 ;

[0028] Figure 9 A schematic diagram of the distribution of a first resource provided in an embodiment of this application. Figure 5 ;

[0029] Figure 10 A schematic diagram of the distribution of a first resource provided in an embodiment of this application. Figure 6 ;

[0030] Figure 11A schematic flowchart of a channel transmission method provided in an embodiment of this application;

[0031] Figure 12 A schematic diagram of a synchronization signal block bitmap provided in an embodiment of this application;

[0032] Figure 13 A schematic diagram of the distribution of a first resource provided in an embodiment of this application. Figure 7 ;

[0033] Figure 14 A schematic flowchart of a channel transmission method is also provided for embodiments of this application;

[0034] Figure 15 A schematic diagram illustrating the interaction between a network device and a terminal, provided as an embodiment of this application;

[0035] Figure 16 Schematic diagram of the structural composition of the network device provided in the embodiments of this application Figure 1 ;

[0036] Figure 17 Schematic diagram of the structural composition of the terminal provided in the embodiments of this application Figure 1 ;

[0037] Figure 18 Schematic diagram of the structural composition of the network device provided in the embodiments of this application Figure 2 ;

[0038] Figure 19 Schematic diagram of the structural composition of the terminal provided in the embodiments of this application Figure 2 . Detailed Implementation

[0039] Figure 1 A block diagram of a communication system provided in an exemplary embodiment of this application is shown. The communication system may include a terminal 101 and a network device 102.

[0040] Terminal 101 may include various handheld devices, vehicle-mounted devices, wearable devices, computing devices, or other processing devices connected to a wireless modem, as well as various forms of user equipment, mobile stations (MS), terminals, etc. For ease of description, the devices mentioned above are collectively referred to as terminals. Network device 102 and terminal 101 communicate with each other through some air interface technology, such as a Uu interface.

[0041] Network device 102 can be an evolved NodeB (eNB), access point (AP), or relay station in a Long Term Evolution (LTE) system, or a base station (such as a gNB or Transmission Point (TRP)) in a 5G system. In a 5G NR-U system, devices with base station functionality are called gNodeBs or gNBs. The description of "base station" may change as communication technologies evolve. Network device 102 can also be a wireless controller, mobile switching center, relay station, access point, vehicle-mounted equipment, wearable device, hub, switch, bridge, router, or network device in a cloud radio access network (CRAN) scenario. It can also be a base station (such as gNB or transmission point (TRP) in an NTN system, a base station (BTS) in a Global System of Mobile communication (GSM) system or a Code Division Multiple Access (CDMA) system, or a base station (NodeB, NB) in a Wideband Code Division Multiple Access (WCDMA) system. In this application, the embodiments do not limit the scope of the embodiments.

[0042] In addition, in this embodiment, network device 102 provides services to a cell, and terminal 101 communicates with network device 102 through the transmission resources (e.g., frequency domain resources, or spectrum resources) used by the cell. This cell can be a cell corresponding to network device 102 (e.g., a base station). The cell can belong to a macro base station or a base station corresponding to a small cell. Small cells can include: etro cells, micro cells, pico cells, femto cells, etc. These small cells have the characteristics of small coverage area and low transmission power, making them suitable for providing high-speed data transmission services. Furthermore, the cell can also be a hypercell.

[0043] In the embodiments of this application, multiple cells can operate simultaneously on a carrier in an LTE or NR system. In certain special scenarios, the concepts of carrier and cell can be considered equivalent. For example, in a carrier aggregation (CA) scenario, when configuring a secondary carrier for a UE, the carrier index of the secondary carrier and the cell identifier (Cell Identify, Cell ID) of the secondary cell operating on that secondary carrier are carried simultaneously. In this case, the concepts of carrier and cell can be considered equivalent; for example, a UE accessing a carrier is equivalent to accessing a cell.

[0044] In NR systems, common channels and signals, such as synchronization signals (SS) and physical broadcast channels (PBCH), need to cover the entire cell using multi-beam scanning to facilitate UE reception within the cell. Multi-beam transmission of synchronization signals is achieved by defining SS / PBCH burst sets. An SS / PBCH burst set contains one or more SS / PBCH blocks. One SS / PBCH block carries the synchronization signal and physical broadcast channel for one beam. Therefore, an SS / PBCH burst set can contain the synchronization signals for N beams corresponding to an SS / PBCH block within the cell. The maximum number L of SS / PBCH blocks is related to the system's frequency band. For example, when the system's frequency band does not exceed 3GHz, the maximum number L of SS / PBCH blocks is 4; when the system's frequency band is between 3GHz and 6GHz, the maximum number L of SS / PBCH blocks is 8; and when the system's frequency band is between 6GHz and 52.6GHz, the maximum number L of SS / PBCH blocks is 64.

[0045] In an NR system, a Synchronization Signal Block (SSB) is used to carry the synchronization signal and broadcast channel of a beam. A synchronization signal block includes the SSBs of all beams within the cell.

[0046] SSB is a set of time-frequency resources (resource units) transmitted on a basic Orthogonal Frequency Division Multiplexing (OFDM) grid, including the Primary Synchronization Signal (PSS), the Secondary Synchronization Signal (SSS), and the Physical Broadcast Channel (PBCH).

[0047] Figure 2 The time-frequency structure of a synchronization signal block is given, such as... Figure 2 As shown, the synchronization signal block lasts for 4 OFDM symbols in the time domain and 240 subcarriers (SCs) in the frequency domain. Specifically, the PSS is transmitted on the first OFDM symbol of the synchronization signal block, occupying 127 subcarriers in the frequency domain, with the remaining subcarriers empty; the SSS is transmitted on the third OFDM symbol of the synchronization signal block, occupying the same number of subcarriers as the PSS, with 8 and 9 subcarriers empty at the ends of the SSS, respectively; the PBCH is transmitted on the second and fourth OFDM symbols of the synchronization signal block. Additionally, the PBCH also uses 48 subcarriers at each end of the SSS for transmission.

[0048] It should be noted that within an SS / PBCH burst set, all SSBs are transmitted within a 5ms time window and are repeatedly transmitted at a certain period. The period can be configured through the upper-layer parameter SSB period (SSB-timing). The SSB period can be 5ms, 10ms, 20ms, 40ms, 80ms, 160ms, etc. This application embodiment does not limit this.

[0049] Within a half-frame, the time slot distribution of SSBs is related to the subcarrier spacing and the maximum number L of SSBs in the synchronization signal set. Figure 3 A schematic diagram of the time slot distribution of a synchronization signal block is given. It can be seen that for different subcarrier intervals, the number of time slots within a half-frame is different, the maximum number L of SSBs in the synchronization signal block burst concentration is different, and the corresponding time slot distribution is also different. Figure 3 As shown, taking a subcarrier spacing of 15KHz as an example, a half-frame has 5 time slots, and one time slot can carry two SSBs. If L is 4, the SSB is sent in the first two time slots. If L is 8, the SSB is sent in the first four time slots.

[0050] Figure 4A schematic diagram of the distribution of synchronization signal blocks within a time slot is given, with a total of 5 cases, namely A / B / C / D / E. A time slot includes 14 symbols. Taking Case A as an example, it corresponds to a subcarrier spacing of 15KHz. In each time slot, the first SSB occupies symbols 2-5, and the second SSB occupies symbols 8-11.

[0051] It should be noted that each SSB is distinguished by an SSB index, which ranges from [0, L-1]. When a terminal receives an SSB, it can read the SSB index and half-frame indication to determine the symbol occupied by that SSB. After the terminal demodulates the PSS to obtain the length of a symbol, it can obtain the time slot boundary, thus completing frame synchronization. The SSB index is indicated by the DMRS of the PBCH or information carried by the PBCH, and the half-frame indication is indicated by information carried by the PBCH.

[0052] The technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings.

[0053] This application provides a channel transmission method applied to a network device, the method comprising:

[0054] S101. Based on the first resource set, a first physical broadcast channel is transmitted; wherein, the first resource set includes: at least one first resource, a first resource being the resource occupied by transmitting a physical broadcast channel once; the first physical broadcast channel is a retransmission of the second physical broadcast channel in the first synchronization signal block; the resource occupied by the second physical broadcast channel is a sub-resource; at least one first resource is different from the second resource occupied by the first synchronization signal block.

[0055] In this embodiment of the application, the network device repeatedly transmits the second PBCH in the first SSB based on the first resource set. The repeatedly transmitted PBCH is the first PBCH, and the first PBCH is a retransmission of the second PBCH.

[0056] The first resource set includes at least one first resource, and each first resource is used to retransmit the second PBCH once. That is, the number of times the network device retransmits the second PBCH corresponds to the number of first resources on which the first PBCH is sent. The first resource set includes the same number of first resources as the number of times the first PBCH is sent.

[0057] Here, the second resource is the resource already occupied by the first SSB, and the first resource is the resource occupied by the first PBCH. Therefore, each first resource in the first resource set is different, and each first resource is different from the second resource.

[0058] It should be noted that the second resource differs from the first resource in at least one of the following ways: 1) the frequency domain resources of the first resource and the sub-resource are different; 2) the time domain resources of the first resource and the second resource are different.

[0059] Frequency domain resources can be represented as the number of subcarriers occupied and the frequency domain positions of the subcarriers. Different frequency domain resources for the first resource and the sub-resource indicate that they occupy different numbers of subcarriers. For example, the first resource contains subcarriers {0, 49}, and the sub-resource contains subcarriers {0, 19}. The first resource contains 50 subcarriers, and the sub-resource contains 20 subcarriers; their frequency domain resources are different. Alternatively, different frequency domain resources for the first resource and the sub-resource indicate that they occupy the same number of subcarriers but have different frequency domain positions. For example, the first resource contains subcarriers {0, 49}, and the sub-resource contains subcarriers {50, 99}. Both the first resource and the sub-resource contain 50 subcarriers, but their frequency domain positions are different; their frequency domain resources are different.

[0060] In the embodiments of this application, the time-domain resources of the first resource and the second resource are different, which may include: 1) the symbol where the first resource is located is a different frame from the frame where the second resource is located; 2) the symbol where the first resource is located is the same frame as the frame where the second resource is located, but the half-frames where they are located are different half-frames; 3) the symbol where the first resource is located is the same half-frame as the frame where the second resource is located, but the time slots where they are located are different time slots; 4) the symbol where the first resource is located is the same time slot as the second resource, but the symbols where they are located are different symbols. The embodiments of this application do not limit this.

[0061] Here, the first resource can be preset or pre-configured by the network device; this application embodiment does not impose any restrictions on this.

[0062] In the case where the first resource is pre-configured by the network device, the network device can indicate the time-domain and frequency-domain resources of the terminal's first resource through indication information. Furthermore, the network device indicates the time-domain and frequency-domain resources of the terminal's first resource in the synchronization signal of the synchronization signal block.

[0063] In this embodiment, the network device encodes the raw data to be transmitted via PBCH and then maps it to modulation symbols of PBCH. The modulation symbols are carried in the first PBCH and the second PBCH. Based on the first resource set, the first physical broadcast channel is transmitted. In this way, the terminal can receive the first physical channel on the first resource set. Here, if the terminal fails to receive the second physical channel, it can receive the first physical channel based on the first resource set and parse the modulation symbols in the first physical channel to obtain the raw data.

[0064] In the embodiments of this application, the first PBCH is a retransmission of the second PBCH. The information carried by the first PBCH and the information carried by the second PBCH are at least partially the same. That is, the higher layer information carried by the first PBCH at least includes the higher layer information carried by the second PBCH. The physical layer information carried by the first PBCH and the physical layer information carried by the second PBCH may be the same or different. This embodiment of the application does not limit this.

[0065] It should be noted that the number of resource units contained in the first resource and the sub-resource can be the same or different, and this application embodiment does not impose any restrictions on this.

[0066] In some embodiments, the number of resource units contained in the first resource and the sub-resource can be the same. In this way, the network device can send the first PBCH on the first resource with the same number of resource units as the sub-resource, thereby reducing the complexity of the network device repeatedly sending PBCH.

[0067] Understandably, the PBCH is used to carry system information necessary for terminal access to the system, ACK / NACK information for feedback uplink logical channels, and HARQ information. For terminals in the NR system that use technologies with lower capabilities such as MTC and NB-IoT, PBCH reception may fail. If PBCH reception fails, the information carried in the PBCH cannot be obtained, affecting terminal services. Therefore, the network device sends a second PBCH based on the second resource set and also repeatedly sends the first PBCH based on the first resource set to achieve retransmission of the second PBCH, thereby enhancing the downlink coverage of the NR system.

[0068] In some embodiments of this application, the first synchronization signal block is included in at least one synchronization signal block corresponding to a time slot, and the at least one synchronization signal block constitutes a set of synchronization signal blocks.

[0069] In the embodiments of this application, the number of SSBs transmitted by the network device in a time slot can be different, that is, the number of SSBs contained in the SSB set is different. The fewer the number of SSBs in a time slot, the more resources the first resource can use in a time slot, and the more first resources in the first resource set. In this way, even if the terminal fails to receive the first PBCH on a first resource, it can still receive the first PBCH on other first resources in the first resource set, thereby improving the downlink coverage in the NR system.

[0070] In some embodiments of this application, within a time slot, the first resource is a resource whose time domain resource is different from the used resource occupied by the set of synchronization signal blocks, and whose frequency domain resource is the same as that of the first resource and the sub-resource.

[0071] In this embodiment of the application, the network device sends an SSB set in a time slot and sends a first PBCH in the same time slot. The first resource of the first PBCH is different from the time domain resource occupied by the SSB in the same time slot. That is, in this time slot, the first resource is on a time domain resource other than the time domain resource occupied by the used resource. Furthermore, the first resource can be the same as the frequency domain resource of the sub-resource.

[0072] It should be noted that within a time slot, the time domain resources of the first resource and the used resources are different, indicating that the symbols occupied by the first resource are different from those occupied by the used resources. Here, the symbols occupied by the used resources are considered as a symbol set. If all the symbols occupied by the first resource are not in the symbol set of the used resources, it means that the symbols occupied by the first resource are different from those occupied by the used resources.

[0073] For example, the first resource contains the symbols {1, 2, 3}, and the used resource contains the symbols {4, 5, 6, 7}. This indicates that the first resource and the used resource use different symbols, that is, the first resource and the used resource have different time-domain resources.

[0074] The first resource and the sub-resource have the same frequency domain resources, which means that the first resource and the sub-resource contain the same number of subcarriers and the same frequency domain position of the subcarriers. For example, the first resource contains subcarriers {0, 49} and the sub-resource contains subcarriers {0, 49}. Both have 50 subcarriers and the same frequency domain position of the subcarriers.

[0075] It is understandable that the network device transmits the first PBCH based on the first resource. The first resource and the sub-resource have the same frequency domain resources. That is, the first PBCH transmitted by the network device has the same frequency domain resources as the second PBCH. This increases the downlink coverage of the NR system and reduces the complexity of repeated transmission by the network device.

[0076] In some embodiments of this application, the time-domain resource of the used resource is the first symbol where the set of synchronization signal blocks is located; for a time slot, the network device transmits a first physical broadcast channel on the second symbol based on the same frequency-domain resource as the sub-resource; the second symbol is any symbol in a time slot other than the first symbol.

[0077] In this embodiment of the application, the time-domain resource of the used resource is the symbol where the SSB is located in a time slot. The set of these symbols is the first symbol. In a time slot, the symbol that is different from the first symbol is the second symbol. The time-domain resource represented by the first symbol is a time-domain resource that is different from the time-domain resource represented by the second symbol.

[0078] In this embodiment of the application, the network device can send the first PBCH on the second symbol based on the same frequency domain resources as the sub-resource. That is, within a time slot, the symbols occupied by the first resource are different from the symbols occupied by the SSB in the same time slot, but the frequency domain resources are the same.

[0079] In some embodiments, the symbol containing the second PBCH in the first symbol is taken as the third symbol, and each symbol in the second symbol is taken as the second sub-symbol. Since the second PBCH is retransmitted at least once, each third symbol corresponds to at least one second sub-symbol, and the network device repeatedly transmits the PBCH on the third symbol on the corresponding second sub-symbol.

[0080] Figure 5 A schematic diagram of the distribution of a first resource provided in an embodiment of this application. Figure 1 ,like Figure 5 As shown, the network device transmits SSBs SSB0 and SSB1 in one time slot. SSB0 occupies symbols 2-5, and SSB1 occupies symbols 8-11. The first symbol includes symbols 2-5 and 8-11, the third symbol includes symbols 3-5 and 9-11, and the second symbol includes 0, 1, 6, 7, 12, and 13. Among them, PBCH0-1 on symbols 0, 1, and 6 is PBCH0 in the repeated transmission of SSB0, and PBCH1-1 transmitted on symbols 7, 12, and 13 is PBCH1 in the repeated transmission of SSB1.

[0081] In some embodiments, the third symbols 0, 1, and 6 correspond to the second sub-symbols 3, 4, and 5, respectively, and the third symbols 7, 12, and 13 correspond to the second sub-symbols 9, 10, and 11, respectively. Furthermore, the frequency domain resources occupied by PBCH0 on the third symbols 0, 1, and 6 are the same as those occupied by PBCH0 on the second sub-symbols 3, 4, and 5, respectively, and the frequency domain resources occupied by PBCH1 on the third symbols 7, 12, and 13 are the same as those occupied by PBCH1 on the second sub-symbols 9, 10, and 11.

[0082] In some embodiments of this application, within a time slot, the first resource is the same in the time domain as the third resource occupied by any one of the synchronization signal blocks in the set of synchronization signal blocks, and different in the frequency domain from the sub-resource.

[0083] In this embodiment of the application, the third resource is the resource occupied by any SSB in the same time slot as the first resource. The network device transmits the first PBCH on the same time domain resource as the SSB. The first PBCH and the frequency domain resource of the SSB are different.

[0084] It is understandable that the network device transmits the first PBCH on the same time domain resources as the SSB. The frequency domain resources of the first PBCH and the SSB are different. In other words, the time domain resources of the first PBCH transmitted by the network device are the same as those of the second PBCH. This increases the downlink coverage of the NR system while reducing the complexity of the network repeatedly transmitting PBCH.

[0085] In some embodiments of this application, the time domain resource of the third resource is the first sub-symbol where any synchronization signal block is located; for a time slot, the network device transmits a first physical broadcast channel on the first sub-symbol based on a frequency domain resource that is different from the frequency domain resource of the sub-resource.

[0086] In this embodiment of the application, the time domain resource of the third resource is the symbol where the SSB is located in a time slot. The set of these symbols is the first sub-symbol. The network device sends the first PBCH on the first sub-symbol. On the first sub-symbol, the frequency domain resource of the first resource is different from the frequency domain resource of the sub-resource.

[0087] In some embodiments, the time-domain resource of the third resource is the first sub-symbol where any SSB is located, and the symbol where the PBCH is located in the first sub-symbol is taken as the fourth symbol. The frequency-domain resource of the first PBCH on each fourth symbol in the first resource is distributed in the same way as the frequency-domain resource of the second PBCH on the same symbol in the third resource.

[0088] Figure 6 A schematic diagram of the distribution of a first resource provided in an embodiment of this application. Figure 2 ,like Figure 6As shown, the network device transmits two SSBs, SSB0 and SSB1, in one time slot. SSB0 occupies the first sub-symbols 2-5, and SSB1 occupies the first sub-symbols 8-11. PBCH0-1 on the fourth symbols 3, 4, and 5 are PBCH0 on the repeated fourth symbols 3, 4, and 5, respectively. PBCH1-1 on the fourth symbols 9, 10, and 11 are PBCH1 on the repeated fourth symbols 9, 10, and 11, respectively. The number of subcarriers between the two PBCH0-1 on symbol 4 is the same, and the number of subcarriers between the two PBCH1-1 on symbol 10 is the same.

[0089] Understandably, network devices can repeatedly transmit the PBCH on a single symbol, further reducing the complexity of repeatedly transmitting the PBCH.

[0090] In some embodiments of this application, the first physical broadcast channel is the physical broadcast channel in the second synchronization signal block, and the fourth resource of the second synchronization signal block includes the first resource; the fourth resource does not correspond to a synchronization grid.

[0091] In this embodiment of the application, the second SSB is a retransmitted SSB. The network device can retransmit the PBCH through the retransmitted SSB. The resources occupied by the retransmitted SSB are the fourth resources, which include the first resources occupied by the first PBCH.

[0092] In the embodiments of this application, the fourth resource not corresponding to the synchronization grid indicates that the retransmitted SSB is not on the synchronization grid. That is, if the network device needs to retransmit the SSB, the retransmitted SSB is not on the synchronization grid.

[0093] Figure 7 A schematic diagram of the distribution of a first resource provided in an embodiment of this application. Figure 3 ,like Figure 7As shown, the network device transmits two SSBs, SSB0 and SSB1, within one time slot. SSB0 occupies symbols 2-5. PSS0-1 on symbol 2 is a repeated transmission of PSS0 on the same symbol; SSS0-1 on symbol 4 is a repeated transmission of SSS0 on the same symbol; PBCH0-1 on symbols 3, 4, and 5 are repeated transmissions of PBCH0 on symbols 3, 4, and 5 respectively; and PBCH1-1 on symbols 9, 10, and 11 are repeated transmissions of PSS0 on symbols 9, 10, and 11 respectively. BCH1; The number of subcarriers between the two PBCH0-1 on symbol 4 is the same as the number of subcarriers between the two PBCH0. The number of subcarriers between SSS0-1 and the two PBCH0-1 is the same as the number of subcarriers between SSS0 and the two PBCH0, respectively. The correspondence between time-domain resources and frequency-domain resources between SSB1-1 and SSB1 is the same as the correspondence between time-domain resources and frequency-domain resources between SSB0-1 and SSB0. This will not be repeated in the embodiments of this application.

[0094] In some embodiments of this application, within a time slot, the first resource is a resource whose time domain resource is different or partially different from the third resource occupied by any one of the synchronization signal blocks in the set of synchronization signal blocks, and whose frequency domain resource is different from the sub-resource.

[0095] It should be noted that if the time-domain resource portions of the first resource and the third resource are different within a time slot, it means that at least one symbol in the first resource is not in the symbol set of the third resource. For example, if the first resource contains the symbols {1, 2, 3} and the third resource contains the symbols {3, 4, 5, 6}, then the symbols 1 and 2 in the first resource are not in the symbol set of the third resource.

[0096] Figure 8 A schematic diagram of the distribution of a first resource provided in an embodiment of this application. Figure 4 ,like Figure 8 As shown, the network device transmits two SSBs, SSB0 and SSB1, within one time slot. SSB0 occupies symbols 2-5, and SSB1 occupies symbols 8-11. Specifically, for SSB0, PBCH0-1 and SSB0 both occupy 2 symbols, but their time domain resources differ while their frequency domain resources are the same. PBCH0-2 and SSB0 occupy the same time domain resources but different frequency domain resources. For SSB1, PBCH1-1 and SSB1 both occupy 8 symbols, but their time domain resources differ while their frequency domain resources are the same. PBCH1-2 and SSB1 occupy the same time domain resources but different frequency domain resources.

[0097] In some embodiments, PBCH0-1 and PBCH0-2 have the same frequency domain resources, and PBCH1-1 and PBCH1-2 have the same frequency domain resources, thereby reducing the complexity of network devices repeatedly transmitting PBCH0 and PBCH1.

[0098] In some embodiments, PBCH0-1, PBCH0-2, PBCH1-1, and PBCH1-2 all have the same frequency domain resources, thereby reducing the complexity of network devices repeatedly transmitting PBCH0 and PBCH1.

[0099] Understandably, the network device performs two retransmissions of the PBCH for each SSB in a time slot. That is, the first resource set of each SSB includes two first resources. One first resource is the same as the time domain resource of the third resource, and the other first resource is the same as the frequency domain resource of the first resource mentioned above. This reduces the complexity of the network device repeatedly sending the PBCH twice.

[0100] In some embodiments of this application, the first resource set includes a resource set that is different from at least one of the frequency domain resources and time domain resources of the synchronization signal block set within a time slot; and,

[0101] The first resource set includes a set of resources that are different in both the frequency domain and time domain resources of the synchronization signal block set within a time slot.

[0102] In this embodiment of the application, the first resource set includes: 1) a first resource whose frequency domain resources are different from those of the second resource; 2) a first resource whose time domain resources are different from those of the second resource; and 3) a first resource whose time domain resources and frequency domain resources are both different from those of the second resource.

[0103] Figure 9 A schematic diagram of the distribution of a first resource provided in an embodiment of this application. Figure 5 ,like Figure 9As shown, the network device transmits two SSBs, SSB0 and SSB1, within one time slot. SSB0 occupies symbols 2-5, and SSB1 occupies symbols 8-11. The first resource set includes six first resources: PBCH0-1, PBCH0-2, PBCH0-3, PBCH1-1, PBCH1-2, and PBCH1-3. For SSB0, the time domain resources of the first resource containing PBCH0-1 are different from those of the second resource containing SSB0, but the frequency domain resources are the same. The time domain resources of the first resource containing PBCH0-2 are different from those of the second resource containing SSB0, but the frequency domain resources are different. The time domain resources of the first resource containing PBCH0-3 are the same as those of the second resource containing SSB0, but the frequency domain resources are different. For SSB1, the time domain resources of the first resource containing PBCH1-1 are different from those of the second resource containing SSB1, but the frequency domain resources are the same. The time domain resources occupied by PBCH1-2 and PBCH1-3 are different from those occupied by SSB1, but the frequency domain resources are different.

[0104] In some embodiments, PBCH0-2 and PBCH0-3 have the same frequency domain resources, and PBCH1-2 and PBCH1-3 have the same frequency domain resources, thereby reducing the complexity of network devices retransmitting PBCH0 and PBCH1.

[0105] In some embodiments, PBCH0-2, PBCH0-3, PBCH1-2, and PBCH1-3 all have the same frequency domain resources, thereby reducing the complexity of network devices retransmitting PBCH0 and PBCH1.

[0106] Understandably, network devices can perform PBCH retransmissions on all primary resources, making full use of the time and frequency resources of the time slot where the SSB is located, so as to provide more PBCH retransmissions and enhance the downlink coverage of the NR system.

[0107] In some embodiments of this application, the first time slot corresponding to the first resource is different from the second time slot corresponding to the used resources occupied by the synchronization signal block set; the first time slot and the second time slot have a corresponding relationship.

[0108] In this embodiment of the application, the network device sends an SSB set in the second time slot, and the synchronization set block set includes the first SSB. The network device can send the first PBCH in other time slots other than this time slot. That is to say, the time slot corresponding to the first resource is a first time slot that is different from the second time slot.

[0109] Furthermore, the network device can transmit the first PBCH on the second time slot corresponding to the first time slot. Here, the correspondence between the first time slot and the second time slot can be a preset correspondence in the standard, or it can be a correspondence indicated by the network device to the terminal. In this respect, the embodiments of this application do not impose any restrictions.

[0110] In this embodiment of the application, the network device transmits the first PBCH in the first time slot. The symbol position occupied by the first PBCH in the first time slot may be the same as or different from the symbol position occupied by the second PBCH in the second time slot. This embodiment of the application does not limit this.

[0111] Understandably, the first resource can be on other time slots besides the first synchronization signal block. This allows network devices to send the first PBCH more times on more time domain resources, thus enhancing the downlink coverage of the NR system.

[0112] In some embodiments of this application, the first time slot corresponding to the first resource is located at the first position in the first half-frame, which is consistent with the second position of the third time slot corresponding to the second resource in the second half-frame; the second resource is a used resource; the first symbol position in the first position is consistent with the second symbol position in the second position; wherein, the first symbol position is used to repeatedly transmit the first physical broadcast channel, and the second symbol position is used to transmit the second physical broadcast channel in the first synchronization signal block.

[0113] In this embodiment of the application, the time slot where the first resource is located is the first time slot, which is in the first half-frame. The time slot where the second resource is located is the second time slot, which is in the second half-frame. The first position of the first resource in the first time slot is the same as the second position of the second resource in the second time slot.

[0114] Furthermore, the position of the first symbol position in the first position is the same as the position of the second symbol position in the second position. The network device sends the first PBCH at the first symbol position and sends the second PBCH at the second symbol position.

[0115] In this embodiment of the application, the first half-frame is used to send the first PBCH, and the second half-frame is used to send the second PBCH. In the first half-frame, the network device does not send the SSB. Therefore, the network device can send the first PBCH in the first half-frame.

[0116] In this embodiment of the application, since the network device periodically sends SSB burst sets according to SSB-timing and completes the transmission of SSB burst sets within the second half-frame, and the minimum value of SSB-timing is 5ms, the minimum interval between the first half-frame and the second half-frame is 5ms. That is to say, if SSB-timing is greater than or equal to 10ms, then after the network device completes the transmission of the SSB burst set in the second half-frame, the half-frame interval between the next second half-frame can be the first half-frame.

[0117] It should be noted that, in the half-frames between the second half-frames, which half-frame is the first half-frame can be preset in the standard or indicated by the network device. This application does not limit this.

[0118] Figure 10 A schematic diagram of the distribution of a first resource provided in an embodiment of this application. Figure 6 ,like Figure 10 As shown, the SSB period is 10ms. The network device sends the SSB burst set in the second half frame. All SSBs are sent in the first 4 subframes of the second half frame. Each subframe contains one time slot. The second position in the first time slot of the second half frame includes symbols 2-5 and 8-11. The first position in the first time slot of the first half frame includes symbols 3-5 and 9-11. In symbol 3-5, the PBCH of the repeated second resource is located in symbol 3-5. In symbol 9-11, the PBCH of the repeated second resource is located in symbol 9-11.

[0119] In some embodiments, the SSB period is greater than or equal to 15ms. After the network device sends the SSB burst set in the second half-frame, it does not send the SSB burst set in the next two consecutive half-frames. The network device can also set an M-bit bitmap according to the actual SSB period, where M is the number of half-frames included in an SSB period. The M-bit bitmap is sent to the terminal to indicate which half-frame the terminal sends the first PBCH in an SSB period, or to indicate that the terminal does not repeatedly send the first PBCH in an SSB period.

[0120] In some embodiments of this application, the network device sends a first indication information to the terminal; the first indication information is used to indicate the time domain resources of the second resource occupied by the first synchronization signal block.

[0121] It should be noted that in practical applications, the number of SSBs sent by a network device in an SSB burst can be less than the maximum number L of SSBs in the SSB burst. In this case, the network device can send a first indication information to the terminal, and the terminal can know the time domain resources of the second resource occupied by the first synchronization signal block based on the first indication information.

[0122] The temporal resources of the second resource may include the specific symbol position of the second resource. For example, the symbol occupied by the second resource is a specific symbol in a specific time slot of a specified frame. It may also include the relative position of the SSB in the temporal domain. For example, whether the SSB is the first SSB or the second SSB in a time slot, etc. This application embodiment does not limit this.

[0123] Based on the above embodiments, Figure 11 This application provides a schematic flowchart of a channel transmission method, applicable to network devices, such as... Figure 11 As shown, the method includes:

[0124] S1101. Based on the first resource set, a first physical broadcast channel is transmitted; wherein, the first resource set includes: at least one first resource, a first resource being the resource occupied by transmitting a physical broadcast channel once; the first physical broadcast channel is a retransmission of the second physical broadcast channel in the first synchronization signal block; the resource occupied by the second physical broadcast channel is a sub-resource; at least one first resource is different from the second resource occupied by the first synchronization signal block.

[0125] S1102. Send first indication information to the terminal. The first indication information is used to indicate the time domain resources of the second resource occupied by the first synchronization signal block.

[0126] In this embodiment of the application, the network device retransmits the PBCH based on a first resource set, wherein the first resource set includes at least one first resource, and the number of first resources included in the first resource set represents the number of times the PBCH is retransmitted. Since the network device retransmits the second PBCH in the first SSB, the network device can also send a first indication information to the terminal to indicate the time domain resources of the second resource occupied by the first SSB, so that the terminal can determine the time domain resources of the SSB according to the indication of the network device, and then receive the first PBCH.

[0127] It should be noted that the execution order of S1101 and S1102 can be either S1101 executed first and then S1102 executed, or S1102 executed first and then S1101 executed, or S1101 and S1102 executed simultaneously. This application embodiment does not limit the execution order of S1101 and S1102.

[0128] In some embodiments, the first indication information includes an SSB bitmap, which is used to indicate the time slot in which the terminal's SSB actually resides.

[0129] In this embodiment of the application, taking case C as an example, the maximum number of SSBs that the network device can send is 8, and the SSB bitmap is an 8-bit bitmap. Figure 12This is a schematic diagram of a synchronization signal block bitmap provided in an embodiment of this application, such as... Figure 12 As shown, the information carried by the SSB bitmap is represented as "10101010", where each bit corresponds to 0-7 in the SSB index. Figure 12 The bitmap in the image indicates that the SSB indexes actually sent by the network device are SSB0, SSB2, SSB4, and SSB6. In other words, the network device sends one SSB in each of the first four time slots within the half-frame containing the SSB burst set, with the SSBs located on symbols 2-5 within the time slot.

[0130] Figure 13 A schematic diagram of the distribution of a first resource provided in an embodiment of this application. Figure 7 ,like Figure 13 As shown, the network device transmits SSB0 in a time slot. SSB0 occupies symbols 2-5. The first symbol includes symbols 2-5, and the second symbol includes 0, 1, and 6-13. Among them, PBCH0-1 on symbols 0, 1, and 6, PBCH0-2 on symbols 9-11, and PBCH0-3 on symbols 8, 12, and 13 are PBCH0 in the repeated transmission of SSB0. Here, the symbol where PBCH0-2 is located can also be set in symbols 8-10, and the symbol where PBCH0-3 is located is 11-13. This application embodiment does not limit this.

[0131] Among them, symbols 0, 1 and 6 correspond to symbols 3, 4 and 5 respectively, symbols 9-11 correspond to symbols 3, 4 and 5 respectively, and symbols 8, 12 and 13 correspond to symbols 3, 4 and 5 respectively. Furthermore, the frequency domain resources on the corresponding symbols are the same.

[0132] In some embodiments of this application, the physical broadcast channel modulation symbols mapped on the resource units at corresponding time-frequency locations in the first resource and the sub-resource are the same.

[0133] It should be noted that the resource unit corresponding to the time-frequency position of the first resource is the resource unit in the first resource that has the same relative time-frequency position as the sub-resource.

[0134] For example, the first synchronization signal block occupies symbols 2-5, the second PBCH occupies symbols 3-5, the time domain resources occupied by the first resource are symbols 0, 1 and 6, and the PBCH on symbol 3 is repeatedly transmitted on symbol 0. If the first PBCH occupies subcarriers 0-19 on symbol 0, and the second PBCH occupies subcarriers 20-39 on symbol 3, then the resource unit corresponding to subcarrier 0 on symbol 0 and the resource unit corresponding to subcarrier 20 on symbol 3 are resources with the same relative time-frequency position, and the modulation symbols mapped on these two resource units are the same.

[0135] It should be noted that when a network device needs to send raw data to a terminal via PBCH, it first encodes the raw data, maps the encoded raw data to modulation symbols, and maps the modulation symbols to resource units in PBCH according to preset rules. In other words, if the modulation symbols on resource units at corresponding time and frequency positions are consistent, the network device can still map them on the first resource according to preset rules, reducing the complexity of the network device repeatedly sending the first PBCH.

[0136] This application also provides a channel transmission method applied to a terminal, the method comprising:

[0137] S201. Based on a first resource set, receive a first physical broadcast channel; wherein, the first resource set includes: at least one first resource, a first resource being the resource occupied by receiving a physical broadcast channel once; the first physical broadcast channel being a retransmission of the second physical broadcast channel in the first synchronization signal block; the resource occupied by the second physical broadcast channel is a sub-resource; at least one first resource is different from the second resource occupied by the first synchronization signal block.

[0138] In this embodiment of the application, if the terminal fails to receive the second PBCH in the second resource, it can also receive the first PBCH based on the first resource in the first resource set, wherein the first PBCH is a retransmission of the second PBCH, thereby enhancing the downlink coverage of the NR system.

[0139] In this embodiment of the application, the terminal determines the resources of the first PBCH according to the instructions of the network device. For example, after receiving the synchronization signal in the first SSB, the terminal determines the first resource of the first PBCH based on the synchronization signal. In this way, after the terminal fails to receive the second PBCH in the first SSB, it can receive the first PBCH based on the first resource, thereby enhancing the downlink coverage of the NR system.

[0140] In some embodiments of this application, the first synchronization signal block is included in at least one synchronization signal block corresponding to a time slot, and the at least one synchronization signal block constitutes a set of synchronization signal blocks.

[0141] In the embodiments of this application, the terminal can receive at least one SSB in a time slot. The fewer SSBs the terminal receives in a time slot, the more first resources there are in the first resource set in the same time slot. That is, the more times the terminal can repeatedly receive PBCH in a time slot, and the higher the downlink coverage of the NR system.

[0142] In this embodiment of the application, the information carried by the first PBCH includes the information carried by the second PBCH. In this way, after the terminal receives the first PBCH, it can obtain all the information carried by the second PBCH. That is to say, even if the terminal fails to receive the second PBCH, it can still obtain the information carried in the second PBCH.

[0143] In some embodiments of this application, within a time slot, the first resource is a resource whose time domain resource is different from the used resource occupied by the set of synchronization signal blocks, and whose frequency domain resource is the same as that of the first resource and the sub-resource.

[0144] In this embodiment, the terminal receives the first PBCH on a first resource that has the same frequency domain resources as the second PBCH but different time domain resources. This reduces the complexity of the terminal receiving the first PBCH and also reduces the bandwidth requirements for the terminal to receive the PBCH.

[0145] In some embodiments of this application, the time-domain resource of the used resource is the first symbol where the synchronization signal block set is located; for a time slot, the terminal receives the first physical broadcast channel on the second symbol based on the same frequency-domain resource as the sub-resource; the second symbol is the symbol other than the first symbol in a time slot.

[0146] In the embodiments of this application, the terminal receives the SSB on the first symbol in a time slot. In this time slot, the terminal can receive the first PBCH on the second symbol other than the first symbol. The frequency domain resources of the first PBCH and the second PBCH in the SSB are the same.

[0147] In some embodiments of this application, within a time slot, the first resource is the same in the time domain as the third resource occupied by any one of the synchronization signal blocks in the set of synchronization signal blocks, and different in the frequency domain from the sub-resource.

[0148] In this embodiment of the application, the terminal receives the first PBCH on a first resource that has the same time domain resources as the second PBCH but different frequency domain resources, thereby reducing the complexity of the terminal receiving the first PBCH.

[0149] In some embodiments of this application, the time domain resource of the third resource is the first sub-symbol where any synchronization signal block is located; for a time slot, on the first sub-symbol, the terminal receives the first physical broadcast channel based on the frequency domain resource that is different from the frequency domain resource of the sub-resource.

[0150] In the embodiments of this application, if a terminal receives an SSB on the first sub-symbol within a time slot, it can receive a first PBCH on the first sub-symbol. The frequency domain resources of the first PBCH and the second PBCH in the SSB are different.

[0151] In some embodiments of this application, the first physical broadcast channel is the physical broadcast channel in the second synchronization signal block, and the fourth resource of the second synchronization signal block includes the first resource; the fourth resource does not correspond to the synchronization grid.

[0152] In this embodiment of the application, the terminal receives the retransmitted SSB, the resources occupied by the retransmitted SSB are the fourth resources, and the PBCH in the retransmitted SSB is the first PBCH.

[0153] The fourth resource does not correspond to a synchronization grid, indicating that the retransmitted SSB is not on a synchronization grid.

[0154] Understandably, when a terminal detects an SSB on the synchronization grid, it will recognize the SSB as an SSB normally sent by the network device, thus affecting the terminal's time synchronization.

[0155] In some embodiments of this application, within a time slot, the first resource is a resource whose time domain resource is different or partially different from the third resource occupied by any one of the synchronization signal blocks in the set of synchronization signal blocks, and whose frequency domain resource is different from the sub-resource.

[0156] In the embodiments of this application, the frequency domain resources of the first PBCH and the second PBCH received by the terminal in a time slot are different. The terminal receiving the first PBCH may include at least one of the following: 1) receiving the first PBCH on the symbol where the SSB is located; 2) receiving the first PBCH on a symbol other than the symbol where the SSB is located; 3) receiving the first PBCH on a symbol that is the same as the symbol where the SSB is located.

[0157] Furthermore, in all three cases where the terminal receives the first PBCH, the frequency domain resources of the first PBCH are the same.

[0158] It is understandable that the terminal can receive the first PBCH on multiple time domain resources within a time slot, and the first PBCH and the second PBCH have the same frequency domain resources, which reduces the complexity of the terminal receiving the first PBCH.

[0159] In some embodiments of this application, the first resource set includes a resource set that is different from at least one of the frequency domain resources and time domain resources of the synchronization signal block set within a time slot; and,

[0160] The first resource set includes a set of resources that are different in both the frequency domain and time domain resources of the synchronization signal block set within a time slot.

[0161] In the embodiments of this application, within a time slot, the terminal can receive the first PBCH on all other resources except the SSB. That is, the terminal can receive the first PBCH more times within a time slot, thereby enhancing the downlink coverage of the NR system.

[0162] In some embodiments of this application, the first time slot corresponding to the first resource is different from the second time slot corresponding to the used resources occupied by the synchronization signal block set; the first time slot and the second time slot have a corresponding relationship.

[0163] In some embodiments of this application, the first time slot corresponding to the first resource is located at the first position in the first half-frame, which is consistent with the second position of the third time slot corresponding to the second resource in the second half-frame; the second resource is a used resource; the first symbol position in the first position is consistent with the second symbol position in the second position; wherein, the first symbol position is used to receive the first physical broadcast channel, and the second symbol position is used to receive the second physical broadcast channel in the first synchronization signal block.

[0164] In this embodiment, the terminal receives the first PBCH in the first time slot according to the correspondence between the first time slot and the second time slot. The first time slot is a time slot different from the time slot where the SSB is located. As a result, the terminal can receive more first PBCHs in more time domain resources within the first time slot, which further enhances the downlink coverage of the NR system.

[0165] In some embodiments of this application, the terminal receives first indication information; the first indication information is used to indicate the time domain resources of the second resource occupied by the first synchronization signal block.

[0166] In this embodiment of the application, after receiving the first instruction information, the terminal determines the time domain resources of the second resource actually occupied by the SSB based on the first instruction information.

[0167] Based on the above embodiments, Figure 14 This application also provides a schematic flowchart of a channel transmission method, applied to a terminal, such as... Figure 14 As shown, the method includes:

[0168] S1401. Based on a first resource set, receive a first physical broadcast channel; wherein, the first resource set includes: at least one first resource, a first resource being the resource occupied by receiving a physical broadcast channel once; the first physical broadcast channel is a retransmission of the second physical broadcast channel in the first synchronization signal block; the resource occupied by the second physical broadcast channel is a sub-resource; at least one first resource is different from the second resource occupied by the first synchronization signal block.

[0169] S1402. Receive first indication information, the first indication information is used to indicate the time domain resources of the second resource occupied by the first synchronization signal block.

[0170] It should be noted that the execution order of S1401 and S1402 can be either S1401 executed first and then S1402 executed, or S1402 executed first and then S1401 executed, or S1401 and S1402 executed simultaneously. This application embodiment does not limit the execution order of S1401 and S1402.

[0171] In some embodiments of this application, the physical broadcast channel modulation symbols mapped on the resource units at corresponding time-frequency locations in the first resource and the sub-resource are the same.

[0172] In the embodiments of this application, the first PBCH and the second PBCH received by the terminal carry the same information on resource units with the same relative time and frequency location, thereby reducing the complexity of the terminal receiving the first PBCH.

[0173] It should be noted that the transmission methods of the terminal-side channel and the network device-side channel are corresponding, and the description of the first resource is also the same, so it will not be repeated here.

[0174] This application provides a channel transmission method for interaction between network devices and terminals, such as... Figure 15 As shown, the method includes:

[0175] S1501. The network device sends a first physical broadcast channel to the terminal based on a first resource set; wherein, the first resource set includes: at least one first resource, a first resource being the resource occupied by sending a physical broadcast channel once; the first physical broadcast channel is a retransmission of the second physical broadcast channel in the first synchronization signal block; the resource occupied by the second physical broadcast channel is a sub-resource; at least one first resource is different from the second resource occupied by the first synchronization signal block.

[0176] In this embodiment, the network device retransmits the second PBCH in the first SSB based on the first resource set, and the first PBCH is a retransmission of the second PBCH. The terminal receives the second PBCH in the first SSB on the second resource. If the reception fails, it can also receive the first PBCH based on the first resource, thereby improving the downlink coverage of the NR system.

[0177] Figure 16 Schematic diagram of the structural composition of the network device provided in the embodiments of this application Figure 1 ,like Figure 16 As shown, the network device 16 includes:

[0178] Transmission module 161 is used to transmit a first physical broadcast channel based on a first resource set; wherein,

[0179] The first resource set includes: at least one first resource, wherein a first resource is the resource occupied by transmitting the physical broadcast channel once; the first physical broadcast channel is a retransmission of the second physical broadcast channel in the first synchronization signal block; the resource occupied by the second physical broadcast channel is a sub-resource; and the at least one first resource is different from the second resource occupied by the first synchronization signal block.

[0180] In some embodiments, the first synchronization signal block is included in at least one synchronization signal block corresponding to a time slot, and the at least one synchronization signal block constitutes the synchronization signal block set.

[0181] In some embodiments, within a time slot, the first resource is a resource that is different in time domain from the used resources occupied by the set of synchronization signal blocks, and is the same in frequency domain as the first resource and the sub-resource.

[0182] In some embodiments, the time-domain resource of the used resource is the first symbol containing the set of synchronization signal blocks; the transmitting module 161 is further configured to transmit a first physical broadcast channel based on the first resource set, including:

[0183] For a time slot, on a second symbol, the first physical broadcast channel is transmitted based on the frequency domain resources of the sub-resource; the second symbol is the symbol in the time slot other than the first symbol.

[0184] In some embodiments, within a time slot, the first resource is the same in the time domain as the third resource occupied by any one of the synchronization signal blocks in the set of synchronization signal blocks, and different in the frequency domain from the sub-resource.

[0185] In some embodiments, the time-domain resource of the third resource is the first sub-symbol containing any synchronization signal block; the transmitting module 161 is further configured to transmit a first physical broadcast channel based on the first resource set, including:

[0186] For a given time slot, on the first sub-symbol, the first physical broadcast channel is transmitted based on a frequency domain resource that is different from the frequency domain resource of the sub-resource.

[0187] In some embodiments, the first physical broadcast channel is a physical broadcast channel in a second synchronization signal block, and the fourth resource of the second synchronization signal block includes the first resource; the fourth resource does not correspond to a synchronization grid.

[0188] In some embodiments, within a time slot, the first resource is a resource whose time-domain resource is different or partially different from the third resource occupied by any one of the synchronization signal blocks in the set of synchronization signal blocks, and whose frequency-domain resource is different from the sub-resource.

[0189] In some embodiments, the first resource set includes a resource set that is different from at least one of the frequency domain resources and the time domain resources where the synchronization signal block set is located within a time slot; and the first resource set includes a resource set that is different from both the frequency domain resources and the time domain resources where the synchronization signal block set is located within a time slot.

[0190] In some embodiments, the first time slot corresponding to the first resource is different from the second time slot corresponding to the used resources occupied by the synchronization signal block set; the first time slot and the second time slot have a corresponding relationship.

[0191] In some embodiments, the sending module 161 is further configured to send first indication information to the terminal; the first indication information is used to indicate the time domain resources of the second resource occupied by the first synchronization signal block.

[0192] In some embodiments, the physical broadcast channel modulation symbols mapped on resource units at corresponding time-frequency locations in the first resource and the sub-resources are the same.

[0193] Figure 17 Schematic diagram of the structural composition of the terminal provided in the embodiments of this application Figure 1 ,like Figure 17 As shown, the terminal 17 includes:

[0194] Receiving module 171 is configured to receive a first physical broadcast channel based on a first resource set; wherein,

[0195] The first resource set includes: at least one first resource, wherein the first resource is the resource occupied by receiving the physical broadcast channel once; the first physical broadcast channel is a retransmission of the second physical broadcast channel in the first synchronization signal block; the resource occupied by the second physical broadcast channel is a sub-resource; and the at least one first resource is different from the second resource occupied by the first synchronization signal block.

[0196] In some embodiments, the first synchronization signal block is included in at least one synchronization signal block corresponding to a time slot, and the at least one synchronization signal block constitutes the synchronization signal block set.

[0197] In some embodiments, within a time slot, the first resource is a resource that is different in time domain from the used resources occupied by the set of synchronization signal blocks, and is the same in frequency domain as the first resource and the sub-resource.

[0198] In some embodiments, the time-domain resource of the used resource is the first symbol containing the synchronization signal block set; the receiving module 171 is further configured to receive a first physical broadcast channel based on the first resource set, including:

[0199] For a time slot, on a second symbol, the first physical broadcast channel is received based on the frequency domain resources of the sub-resource; the second symbol is the symbol other than the first symbol within the time slot.

[0200] In some embodiments, within a time slot, the first resource is the same in the time domain as the third resource occupied by any one of the synchronization signal blocks in the set of synchronization signal blocks, and different in the frequency domain from the sub-resource.

[0201] In some embodiments, the time-domain resource of the third resource is the first sub-symbol containing any synchronization signal block; the receiving module 171 is further configured to receive the first physical broadcast channel based on the first resource set, including:

[0202] For a given time slot, on the first sub-symbol, the first physical broadcast channel is received based on frequency domain resources that are different from the frequency domain resources of the sub-resource.

[0203] In some embodiments, the first physical broadcast channel is a physical broadcast channel in a second synchronization signal block, and the fourth resource of the second synchronization signal block includes the first resource; the fourth resource does not correspond to a synchronization grid.

[0204] In some embodiments, within a time slot, the first resource is a resource whose time-domain resource is different or partially different from the third resource occupied by any one of the synchronization signal blocks in the set of synchronization signal blocks, and whose frequency-domain resource is different from the sub-resource.

[0205] In some embodiments, the first resource set includes a resource set that is different from at least one of the frequency domain resources and the time domain resources where the synchronization signal block set is located within a time slot; and the first resource set includes a resource set that is different from both the frequency domain resources and the time domain resources where the synchronization signal block set is located within a time slot.

[0206] In some embodiments, the first time slot corresponding to the first resource is different from the second time slot corresponding to the used resources occupied by the synchronization signal block set; the first time slot and the second time slot have a corresponding relationship.

[0207] In some embodiments, the receiving module 171 is further configured to receive first indication information; the first indication information is used to indicate the time domain resources of the second resource occupied by the first synchronization signal block.

[0208] In some embodiments, the physical broadcast channel modulation symbols mapped on resource units at corresponding time-frequency locations in the first resource and the sub-resources are the same.

[0209] Figure 18This is a schematic diagram of the structural composition of a network device according to an embodiment of this application. Figure 2 ,like Figure 18 As shown, the network device 18 includes a first memory 1801, a first processor 1802, and a computer program stored in the first memory 1801 and executable on the first processor 1802; wherein, when the first processor runs the computer program, it executes the channel transmission method of the network device side as described in the foregoing embodiments.

[0210] It is understood that network device 18 also includes bus system 1803; the various components in network device 18 are coupled together through bus system 1803. It is understood that bus system 1803 is used to implement communication between these components. In addition to a data bus, bus system 1803 also includes a power bus, a control bus, and a status signal bus.

[0211] Figure 19 This is a schematic diagram of the terminal structure in an embodiment of this application. Figure 2 ,like Figure 19 As shown, terminal 19 includes a second memory 1901, a second processor 1902, and a computer program stored in the second memory 1901 and executable on the second processor 1902; wherein, when the second processor runs the computer program, it executes the channel transmission method on the terminal side as described in the foregoing embodiments.

[0212] It is understood that terminal 19 also includes bus system 1903; the various components in terminal 19 are coupled together through bus system 1903. It is understood that bus system 1903 is used to implement communication between these components. In addition to a data bus, bus system 1903 also includes a power bus, a control bus, and a status signal bus.

[0213] It is understood that the memory in this embodiment can be volatile memory or non-volatile memory, or both. Specifically, non-volatile memory can be read-only memory (ROM), programmable read-only memory (PROM), erasable programmable read-only memory (EPROM), electrically erasable programmable read-only memory (EEPROM), magnetic random access memory (FRAM), flash memory, magnetic surface memory, optical disc, or compact disc read-only memory (CD-ROM); magnetic surface memory can be disk storage or magnetic tape storage. Volatile memory can be random access memory (RAM), which is used as an external cache. By way of example, but not limitation, many forms of RAM are available, such as Static Random Access Memory (SRAM), Synchronous Static Random Access Memory (SSRAM), Dynamic Random Access Memory (DRAM), Synchronous Dynamic Random Access Memory (SDRAM), Double Data Rate Synchronous Dynamic Random Access Memory (DDRSDRAM), Enhanced Synchronous Dynamic Random Access Memory (ESDRAM), SyncLink Dynamic Random Access Memory (SLDRAM), and Direct Rambus Random Access Memory (DRRAM).The memories described in the embodiments of this application are intended to include, but are not limited to, these and any other suitable types of memories.

[0214] The methods disclosed in the embodiments of this application can be applied to a processor or implemented by a processor. A processor may be an integrated circuit chip with signal processing capabilities. During implementation, each step of the above methods can be completed by integrated logic circuits in the processor's hardware or by instructions in software form. The processor may be a general-purpose processor, a DSP, or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. The processor can implement or execute the methods, steps, and logic block diagrams disclosed in the embodiments of this application. A general-purpose processor may be a microprocessor or any conventional processor, etc. The steps of the methods disclosed in the embodiments of this application can be directly manifested as execution by a hardware decoding processor, or execution by a combination of hardware and software modules in the decoding processor. The software modules may be located in a storage medium, which is located in memory. The processor reads information from the memory and, in conjunction with its hardware, completes the steps of the aforementioned methods.

[0215] This application also provides a computer-readable storage medium storing a computer program thereon. When the computer-readable storage medium is located in a network device, the computer program is executed by a first processor to implement the steps in the network device side channel transmission method of this application.

[0216] This application also provides a computer-readable storage medium storing a computer program thereon. When the computer-readable storage medium is located at a terminal, the computer program is executed by a second processor to implement the steps in the terminal-side channel transmission method of this application.

[0217] In the several embodiments provided in this application, it should be understood that the disclosed devices and methods can be implemented in other ways. The device embodiments described above are merely illustrative. For example, the division of modules is only a logical functional division, and in actual implementation, there may be other division methods, such as: multiple modules or components can be combined, or integrated into another system, or some features can be ignored or not executed. In addition, the coupling, direct coupling, or communication connection between the various components shown or discussed can be through some interfaces, and the indirect coupling or communication connection between devices or modules can be electrical, mechanical, or other forms.

[0218] Industrial applicability

[0219] In this embodiment of the application, the network device retransmits the PBCH to the terminal at least once based on the first resource set. In this way, the terminal can still receive the retransmitted PBCH after failing to receive the PBCH in the synchronization signal block, thereby enhancing the downlink coverage of the NR system.

Claims

1. A channel transmission method, applied to a network device, characterized in that, include: Based on the first resource set, a first physical broadcast channel is transmitted; wherein... The first resource set includes: at least one first resource, which is the resource occupied by transmitting the physical broadcast channel once; the first physical broadcast channel is a retransmission of the second physical broadcast channel in the first synchronization signal block; the resource occupied by the second physical broadcast channel is a sub-resource; the at least one first resource is different from the second resource occupied by the first synchronization signal block; the mapping physical broadcast channel modulation symbols are the same on the resource units at the corresponding time-frequency positions in the first resource and the sub-resource, and the resource units at the corresponding time-frequency positions in the first resource and the sub-resource are: resource units in the first resource that have the same relative time-frequency position as those in the sub-resource; The first synchronization signal block is contained in at least one synchronization signal block corresponding to a time slot, and the at least one synchronization signal block constitutes the synchronization signal block set; Wherein, within a time slot, the first resource is a resource whose time domain resource is different from the used resource occupied by the synchronization signal block set, and whose frequency domain resource is the same as the sub-resource; each third symbol containing the second physical broadcast channel corresponds to at least one second sub-symbol, so that the first physical broadcast channel is transmitted on the corresponding second sub-symbol; the first symbol is the symbol containing the synchronization signal block set; the third symbol is the symbol containing the second physical broadcast channel in the first symbol; the second symbol is the symbol other than the first symbol within the time slot, and the second sub-symbol is each of the second symbols; Alternatively, within a time slot, the first resource is a resource whose time domain resources are the same as or partially different from those of the sub-resource occupied by the second physical broadcast channel in any synchronization block of the synchronization signal block set, and whose frequency domain resources are different from those of the sub-resource.

2. The method according to claim 1, characterized in that, The time-domain resource of the used resource is the first symbol where the synchronization signal block set is located; the step of sending the first physical broadcast channel based on the first resource set includes: For the given time slot, on the second symbol, the first physical broadcast channel is transmitted based on the same frequency domain resources as the sub-resource.

3. The method according to claim 1, characterized in that, When the first resource is the same in the time domain as the third resource occupied by any one of the synchronization signal blocks in the set of synchronization signal blocks within the same time slot, and different in the frequency domain from the sub-resource, the time domain resource of the third resource is the first sub-symbol where any one of the synchronization signal blocks is located. The step of sending the first physical broadcast channel based on the first resource set includes: For a given time slot, on the first sub-symbol, the first physical broadcast channel is transmitted based on a frequency domain resource that is different from the frequency domain resource of the sub-resource.

4. The method according to claim 3, characterized in that, The first physical broadcast channel is the physical broadcast channel in the second synchronization signal block, and the fourth resource of the second synchronization signal block includes the first resource; the fourth resource does not correspond to a synchronization grid.

5. The method according to claim 1, characterized in that, The first resource set includes a resource set that is different from at least one of the frequency domain resources and time domain resources of the synchronization signal block set within the same time slot; and, The first resource set includes resource sets that are different in both the frequency domain resources and the time domain resources in which the synchronization signal block set is located within the same time slot.

6. The method according to claim 1, characterized in that, The first time slot corresponding to the first resource is different from the second time slot corresponding to the used resources occupied by the synchronization signal block set; the first time slot and the second time slot have a corresponding relationship.

7. The method according to any one of claims 1 to 6, characterized in that, The method includes: Send a first indication message to the terminal; the first indication message is used to indicate the time domain resources of the second resource occupied by the first synchronization signal block.

8. A channel transmission method, applied to a terminal, characterized in that, include: Based on the first resource set, a first physical broadcast channel is received; wherein... The first resource set includes: at least one first resource, which is the resource occupied by receiving the physical broadcast channel once; the first physical broadcast channel is a retransmission of the second physical broadcast channel in the first synchronization signal block; the resource occupied by the second physical broadcast channel is a sub-resource; the at least one first resource is different from the second resource occupied by the first synchronization signal block; the mapping physical broadcast channel modulation symbols are the same on the resource units at the corresponding time-frequency positions in the first resource and the sub-resource, and the resource units at the corresponding time-frequency positions in the first resource and the sub-resource are: resource units in the first resource that have the same relative time-frequency position as those in the sub-resource; The first synchronization signal block is contained in at least one synchronization signal block corresponding to a time slot, and the at least one synchronization signal block constitutes the synchronization signal block set; Wherein, within a time slot, the first resource is a resource whose time domain resource is different from the used resource occupied by the synchronization signal block set, and whose frequency domain resource is the same as the sub-resource; each third symbol containing the second physical broadcast channel corresponds to at least one second sub-symbol, so that the first physical broadcast channel is transmitted on the corresponding second sub-symbol; the first symbol is the symbol containing the synchronization signal block set; the third symbol is the symbol containing the second physical broadcast channel in the first symbol; the second symbol is the symbol other than the first symbol within the time slot, and the second sub-symbol is each of the second symbols; Alternatively, within a time slot, the first resource is a resource whose time domain resources are the same as or partially different from those of the sub-resource occupied by the second physical broadcast channel in any synchronization block of the synchronization signal block set, and whose frequency domain resources are different from those of the sub-resource.

9. The method according to claim 8, characterized in that, The time-domain resource of the used resource is the first symbol where the synchronization signal block set is located; the step of receiving the first physical broadcast channel based on the first resource set includes: For the aforementioned time slot, on the second symbol, the first physical broadcast channel is received based on the same frequency domain resources as the sub-resources.

10. The method according to claim 8, characterized in that, When the first resource is the same in the time domain as the third resource occupied by any one of the synchronization signal blocks in the set of synchronization signal blocks within the same time slot, and different in the frequency domain from the sub-resource, the time domain resource of the third resource is the first sub-symbol where any one of the synchronization signal blocks is located. The step of receiving the first physical broadcast channel based on the first resource set includes: For a given time slot, on the first sub-symbol, the first physical broadcast channel is received based on frequency domain resources that are different from the frequency domain resources of the sub-resource.

11. The method according to claim 10, characterized in that, The first physical broadcast channel is the physical broadcast channel in the second synchronization signal block, and the fourth resource of the second synchronization signal block includes the first resource; the fourth resource does not correspond to a synchronization grid.

12. The method according to claim 8, characterized in that, The first resource set includes a resource set that is different from at least one of the frequency domain resources and time domain resources of the synchronization signal block set within the same time slot; and, The first resource set includes resource sets that are different in both the frequency domain resources and the time domain resources in which the synchronization signal block set is located within the same time slot.

13. The method according to claim 8, characterized in that, The first time slot corresponding to the first resource is different from the second time slot corresponding to the used resources occupied by the synchronization signal block set; the first time slot and the second time slot have a corresponding relationship.

14. The method according to any one of claims 8 to 13, characterized in that, The method includes: Receive first indication information; the first indication information is used to indicate the time domain resources of the second resource occupied by the first synchronization signal block.

15. A network device, characterized in that, include: The sending module is used to send a first physical broadcast channel based on a first resource set; wherein, The first resource set includes: at least one first resource, which is the resource occupied by transmitting the physical broadcast channel once; the first physical broadcast channel is a retransmission of the second physical broadcast channel in the first synchronization signal block; the resource occupied by the second physical broadcast channel is a sub-resource; the at least one first resource is different from the second resource occupied by the first synchronization signal block; the mapping physical broadcast channel modulation symbols are the same on the resource units at the corresponding time-frequency positions in the first resource and the sub-resource, and the resource units at the corresponding time-frequency positions in the first resource and the sub-resource are: resource units in the first resource that have the same relative time-frequency position as those in the sub-resource; The first synchronization signal block is contained in at least one synchronization signal block corresponding to a time slot, and the at least one synchronization signal block constitutes the synchronization signal block set; Wherein, within a time slot, the first resource is a resource whose time domain resource is different from the used resource occupied by the synchronization signal block set, and whose frequency domain resource is the same as the sub-resource; each third symbol containing the second physical broadcast channel corresponds to at least one second sub-symbol, so that the first physical broadcast channel is transmitted on the corresponding second sub-symbol; the first symbol is the symbol containing the synchronization signal block set; the third symbol is the symbol containing the second physical broadcast channel in the first symbol; the second symbol is the symbol other than the first symbol within the time slot, and the second sub-symbol is each of the second symbols; Alternatively, within a time slot, the first resource is a resource whose time domain resources are the same as or partially different from those of the sub-resource occupied by the second physical broadcast channel in any synchronization block of the synchronization signal block set, and whose frequency domain resources are different from those of the sub-resource.

16. A terminal, characterized in that, include: The receiving module is configured to receive a first physical broadcast channel based on a first resource set; wherein, The first resource set includes: at least one first resource, which is the resource occupied by receiving the physical broadcast channel once; the first physical broadcast channel is a retransmission of the second physical broadcast channel in the first synchronization signal block; the resource occupied by the second physical broadcast channel is a sub-resource; the at least one first resource is different from the second resource occupied by the first synchronization signal block; the mapping physical broadcast channel modulation symbols are the same on the resource units at the corresponding time-frequency positions in the first resource and the sub-resource, and the resource units at the corresponding time-frequency positions in the first resource and the sub-resource are: resource units in the first resource that have the same relative time-frequency position as those in the sub-resource; The first synchronization signal block is contained in at least one synchronization signal block corresponding to a time slot, and the at least one synchronization signal block constitutes the synchronization signal block set; Wherein, within a time slot, the first resource is a resource whose time domain resource is different from the used resource occupied by the synchronization signal block set, and whose frequency domain resource is the same as the sub-resource; each third symbol containing the second physical broadcast channel corresponds to at least one second sub-symbol, so that the first physical broadcast channel is transmitted on the corresponding second sub-symbol; the first symbol is the symbol containing the synchronization signal block set; the third symbol is the symbol containing the second physical broadcast channel in the first symbol; the second symbol is the symbol other than the first symbol within the time slot, and the second sub-symbol is each of the second symbols; Alternatively, within a time slot, the first resource is a resource whose time domain resources are the same as or partially different from those of the sub-resource occupied by the second physical broadcast channel in any synchronization block of the synchronization signal block set, and whose frequency domain resources are different from those of the sub-resource.

17. A network device, characterized in that, The network device includes: a first processor and a first memory for storing computer programs capable of running on the first processor; Wherein, when the first processor is used to run the computer program, it performs the steps of the method according to any one of claims 1 to 7.

18. A terminal, characterized in that, The terminal includes: a second processor and a second memory for storing computer programs that can run on the second processor; Wherein, when the second processor is used to run the computer program, it performs the steps of the method according to any one of claims 8 to 14.

19. A computer-readable storage medium for use in network devices, characterized in that, The device stores a computer program that, when executed by one or more first processors, performs the channel transmission method according to any one of claims 1 to 7.

20. A computer-readable storage medium, applied to a terminal, characterized in that, The device stores a computer program that, when executed by one or more second processors, performs the channel transmission method according to any one of claims 8 to 14.

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