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WO2019214740A1 - Procédé de transmission de signal et appareil associé et système - Google Patents

Procédé de transmission de signal et appareil associé et système Download PDF

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Publication number
WO2019214740A1
WO2019214740A1 PCT/CN2019/086482 CN2019086482W WO2019214740A1 WO 2019214740 A1 WO2019214740 A1 WO 2019214740A1 CN 2019086482 W CN2019086482 W CN 2019086482W WO 2019214740 A1 WO2019214740 A1 WO 2019214740A1
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WIPO (PCT)
Prior art keywords
pbch block
rmsi
time
pbch
rmsi pdsch
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PCT/CN2019/086482
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English (en)
Chinese (zh)
Inventor
吴霁
朱俊
贾琼
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Huawei Technologies Co Ltd
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Huawei Technologies Co Ltd
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/0001—Arrangements for dividing the transmission path
    • H04L5/0003—Two-dimensional division
    • H04L5/0005—Time-frequency
    • H04L5/0007—Time-frequency the frequencies being orthogonal, e.g. OFDM(A) or DMT
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0053—Allocation of signalling, i.e. of overhead other than pilot signals
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/0091—Signalling for the administration of the divided path, e.g. signalling of configuration information
    • H04L5/0094—Indication of how sub-channels of the path are allocated
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation
    • H04W72/044—Wireless resource allocation based on the type of the allocated resource
    • H04W72/0446—Resources in time domain, e.g. slots or frames
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/20—Control channels or signalling for resource management
    • H04W72/23—Control channels or signalling for resource management in the downlink direction of a wireless link, i.e. towards a terminal

Definitions

  • the present application relates to the field of wireless communications technologies, and in particular, to a signal transmission method, related device, and system applied to an unlicensed frequency band.
  • a synchronization signal burst set (SS burst set) is defined in the new radio (NR). It is mainly used for terminal (including user equipment (UE)) for initial access/system message update/beam management.
  • the SS burst set transmission period can be 5/10/20/40/80/100ms.
  • Figure 1 shows a possible structure of the SS burst set, which consists of several SS/PBCH blocks.
  • the SS/PBCH block is a signal structure suitable for use in 5G and later communication systems.
  • the SS/PBCH block may also be referred to as a synchronization sigal block (SSB), or may have other names, which is not limited in this application.
  • SSB synchronization sigal block
  • the synchronization signal block may generally include a primary synchronization signal (PSS), a secondary synchronization signal (SSS), and a physical broadcast channel (PBCH).
  • PSS primary synchronization signal
  • SSS secondary synchronization signal
  • PBCH physical broadcast channel
  • each SSB continues with 4 orthogonal frequency division multiplexing (OFDM) symbols.
  • the main function of PSS and SSS is to help the UE identify the cell and synchronize with the cell.
  • the PBCH contains the most basic system information such as system frame number and intraframe timing information.
  • the successful reception of the synchronization signal block by the terminal is a prerequisite for its access to the cell.
  • each SS burst set contains a maximum of 8 SS/PBCH blocks; when the carrier frequency is greater than 6 GHz, each SS burst set contains a maximum of 64 SS/PBCH blocks.
  • Each SS/PBCH block can correspond to a beam in a different direction.
  • system information includes a master information block (MIB), remaining minimum system information (RMSI), and other system information (OSI).
  • MIB is carried in the physical broadcast channel PBCH
  • RMSI is carried in the RMSI physical downlink shared channel (PDSCH).
  • PDSCH physical downlink shared channel
  • SCS subcarrier spacing
  • the NR standard defines a preset time position in the SS burst set window that may send an SS/PBCH block.
  • the resource location and resource size of the RMSI PDSCH are variable and indicated by the RMSI Control Resource Set (CORESET).
  • CORESET RMSI Control Resource Set
  • the CORESET is similar to the physical downlink control channel (PDCCH) in LTE, and carries downlink control information (DCI) for indicating resource scheduling.
  • DCI downlink control information
  • the resource indication information of the RMSI CORESET is carried in the PBCH and has 8 bits in total.
  • the flexible RMSI PDSCH resource configuration method designed in the NR may cause the network device to fail to ensure continuous transmission of system information due to loss of channel.
  • the present application provides a signal transmission method, related device and system, which can continuously transmit system information and avoid losing a channel.
  • the present application provides a signal transmission method, which is applied to a network device side.
  • the method may include: after the network device passes the LBT, the synchronization signal/physical broadcast channel block SS/PBCH block and the SS/PBCH block are corresponding.
  • the SS/PBCH block may be any SS/PBCH block to be transmitted.
  • the present application provides a signal transmission method, which is applied to a terminal side, and the method may include: receiving, by the terminal, an RMSI PDSCH corresponding to an SS/PBCH block and an SS/PBCH block, and receiving a time position and receiving of the SS/PBCH block.
  • the time positions of the RMSI PDSCH are consecutively adjacent; the SS/PBCH block carries first indication information, and the first indication information indicates the duration of the RMSI PDSCH.
  • the system information can be continuously and completely transmitted, the network device is prevented from losing the channel in the process of transmitting the system information, and the initial access efficiency of the terminal device is improved.
  • the method described in the first aspect and the second aspect is implemented, and the RMSI CORESET is not required to indicate the resource configuration of the RMSI PDSCH, and the SS/PBCH block carries the indication information (ie, the first indication information) to indicate the resource configuration of the RMSI PDSCH.
  • the resource configuration signaling overhead indicating the RMSI PDSCH is saved.
  • the time window of a certain length (such as a 1 ms time window) may be used.
  • the preset time position corresponding to each of the one or more SS/PBCH blocks is set.
  • the time window of the specific length may be referred to as a first time window.
  • the duration of the first time window can be longer (eg 2ms) or shorter (eg 0.5ms), no application is not limited.
  • the resource mapping manner of the SS/PBCH block and the RMSI PDSCH is explained below.
  • the time position at which the network device sends the SS/PBCH block may be
  • the corresponding preset time position of the SS/PBCH block in the first time window is transmitted at a fixed location.
  • the time position at which the terminal receives the SS/PBCH block may be a preset preset time position of the SS/PBCH block in the first time window. That is, the SS/PBCH block is received at a fixed location.
  • the symbol of the RMSI PDSCH that is not carried in the time interval may be It is filled by the first downlink signal.
  • the first downlink signal may include other downlink signals (such as reference signals such as CSI-RS) instead of the SS/PBCH block. In this way, discontinuous scheduling due to no downlink signal transmission at the time interval can be avoided, and channel access rights can be avoided, and multiple system information (carrying in multiple SS/PBCH blocks and their respective corresponding RMSI PDSCHs) can be realized.
  • the payload of the RMSI PDSCH is insufficient to fill the interval between two adjacent preset time positions in the first time window, that is, the duration of the RMSI PDSCH is less than the interval.
  • the first downlink signal may further include a partial RMSI PDSCH, that is, the time interval may be filled by using a partial RMSI PDSCH, and the receiving effect of the enhanced partial RMSI PDSCH may be achieved.
  • the time position of sending the SS/PBCH block may not be the preset time position corresponding to the SS/PBCH block in the time window of a specific length. That is, the SS/PBCH block is not sent at a fixed location.
  • This other implementation is particularly applicable to the case where the payload of the RMSI PDSCH is insufficient to fill the interval between two adjacent preset time positions in the first time window.
  • the network device sends the RMSI PDSCH corresponding to the SS/PBCH block under the condition that the payload of the RMSI PDSCH is insufficient to fill the interval between two adjacent preset time positions in the first time window.
  • the time position is consecutively adjacent to the time position of the next SS/PBCH block in which the SS/PBCH block is transmitted.
  • the time position of the RMSI PDSCH corresponding to the SS/PBCH block received by the terminal and the time position of the next SS/PBCH block receiving the SS/PBCH block are consecutively adjacent.
  • the terminal When the time position of the SS/PBCH block is not fixed, after the terminal detects an SS/PBCH block, in addition to the time index carried by the PBCH, the terminal needs to determine the system according to the number of symbols sustained by the RMSI PDSCH.
  • the index of the system frame in which the timing information is located, the index of the subframe, and the index of the symbol acquire the cell time synchronization.
  • the blank symbol may be used by the first downlink signal under the condition that there is a blank symbol near the boundary of the first time window. filling.
  • the blank symbol refers to a symbol that does not carry a downlink signal.
  • a blank symbol may exist at the boundary of the last RMSI PDSCH and 1 ms time window in the 1 ms time window, for which the network device may send other downlink signals for padding.
  • discontinuous scheduling due to the absence of downlink signal transmission of the blank symbol can be avoided, and loss of channel access rights can be avoided, and multiple first time windows can be continuously transmitted.
  • the signal transmission methods described in the first aspect and the second aspect are also applicable to the NR system, not limited to the NR-U system.
  • the network equipment in the NR system does not need to obtain channel access rights through the LBT, there is no problem of losing channel access rights.
  • the RMSI PDSCH and the SS/PBCH block are consecutively adjacent in the time domain, and the RMSI CORESET may not be required to indicate the resource configuration of the RMSI PDSCH, and the first indication information carried in the SS/PBCH block indicates the resource configuration of the RMSI PDSCH. It is also possible to save signaling overhead in the NR system.
  • the present application provides a signal transmission method, which is applied to a network device side.
  • the method may include: the network device sends an SS/PBCH block after the LBT, and the remaining minimum system information corresponding to the SS/PBCH block is controlled.
  • the resource set RMSI CORESET and the RMSI PDSCH corresponding to the SS/PBCH block, the time position at which the RMSI PDSCH is transmitted, the time position at which the RMSI CORESET is transmitted, and the time position at which the SS/PBCH block is transmitted are consecutively adjacent.
  • the present application provides a signal transmission method, which is applied to a terminal side, and the method may include: receiving, by the terminal, an SS/PBCH block, an RMSI CORESET corresponding to the SS/PBCH block, and corresponding to the SS/PBCH block.
  • the RMSI PDSCH, the time position at which the SS/PBCH block is received, the time position at which the RMSI CORESET is received, and the time position at which the RMSI PDSCH is received are consecutively adjacent.
  • the system information can be continuously and completely transmitted, and the network device is prevented from losing the channel in the process of transmitting the system information, thereby improving the initial access efficiency of the terminal device.
  • the resource configuration of the RMSI CORESET is indicated by the PBCH in the SS/PBCH block, and the resource configuration of the RMSI PDSCH is indicated by the RMSI CORESET, as specified in NR.
  • the time window of a certain length (such as a 1 ms time window) may be used.
  • the preset time position corresponding to each of the one or more SS/PBCH blocks is set.
  • the time window of the specific length may be referred to as a first time window.
  • the duration of the first time window can be longer (eg 2ms) or shorter (eg 0.5ms), no application is not restricted.
  • the resource mapping manner of the SS/PBCH block and the RMSI PDSCH will be described below.
  • the time position at which the network device sends the SS/PBCH block may be a preset time position corresponding to the SS/PBCH block in the first time window. That is, the SS/PBCH block is transmitted at a fixed location.
  • the time position at which the terminal receives the SS/PBCH block may be a preset preset time position of the SS/PBCH block in the first time window. That is, the SS/PBCH block is received at a fixed location.
  • the RMSI CORESET is not carried in the time interval or The sign of the RMSI PDSCH can be filled by the first downlink signal. In this way, discontinuous scheduling due to no downlink signal transmission at the time interval can be avoided, and channel access rights can be avoided, and multiple system information (carrying in multiple SS/PBCH blocks and their respective corresponding RMSI PDSCHs) can be realized. One-time complete delivery.
  • the first downlink signal may further include a partial RMSI PDSCH, that is, the time interval may be filled by using a partial RMSI PDSCH, and the receiving effect of the enhanced partial RMSI PDSCH may be achieved.
  • the time position of sending the SS/PBCH block may not be the preset time position corresponding to the SS/PBCH block in the first time window. That is, the SS/PBCH block is not sent at a fixed location.
  • This other implementation is particularly applicable to the case where the payload of the RMSI CORESET and RMSI PDSCH is insufficient to fill the interval between two adjacent preset time positions in the first time window.
  • the network device sends the next SS/PBCH block under the condition that the duration of the RMSI CORESET and the RMSI PDSCH is less than the interval between two adjacent preset time positions in the first time window.
  • the time position is consecutively adjacent to the time position of the RMSI PDSCH corresponding to the current SS/PBCH block.
  • the time position at which the terminal receives the next SS/PBCH block is consecutively adjacent to the time position at which the RMSI PDSCH corresponding to the current SS/PBCH block is received.
  • the blank symbol may be used by the first downlink signal under the condition that there is a blank symbol near the boundary of the first time window. filling.
  • the blank symbol refers to a symbol that does not carry a downlink signal. In this way, discontinuous scheduling due to the absence of downlink signal transmission of the blank symbol can be avoided, and loss of channel access rights can be avoided, and multiple first time windows can be continuously transmitted.
  • a network device comprising a plurality of functional units for respectively performing the method provided by any one of the first or third possible embodiments.
  • a terminal comprising a plurality of functional units for respectively performing the method provided by any one of the second or fourth possible embodiments.
  • a network device for performing the signal transmission method described in the first aspect or the third aspect.
  • the network device can include a memory and a processor, a transmitter and a receiver coupled to the memory, wherein: the transmitter is for transmitting a signal to another wireless communication device, such as a terminal, the receiver is for Receiving, by the another wireless communication device, such as a terminal, a signal for storing an implementation code of the signal transmission method described in the first aspect or the third aspect, the processor being configured to perform the storage in the memory Program code, ie a signal transmission method as described in any one of the first or third possible embodiments.
  • a terminal for performing the signal transmission method described in the second aspect or the fourth aspect.
  • the terminal can include a memory and a processor, transmitter and receiver coupled to the memory, wherein: the transmitter is for transmitting a signal to another wireless communication device, such as a network device, the receiver is for Receiving, by the another wireless communication device, such as a network device, a signal for storing an implementation code of the signal transmission method described in the second aspect or the fourth aspect, the processor for performing the storage in the memory
  • the program code that is, the signal transmission method described in any one of the possible aspects of the second aspect or the fourth aspect.
  • a communication system comprising: a network device and a terminal, wherein: the network device can be the network device described in the first aspect or the third aspect.
  • the terminal may be the terminal described in the second aspect or the fourth aspect.
  • a computer readable storage medium having instructions stored thereon that, when run on a computer, cause the computer to perform the signal transmission method described in the first aspect or the third aspect above.
  • a computer program product comprising instructions which, when run on a computer, cause the computer to perform the signal transmission method described in the first aspect or the third aspect above.
  • Figure 1 is a schematic diagram showing the structure of an SS burst set defined in the NR standard
  • FIG. 2 is a schematic structural diagram of a wireless communication system provided by the present application.
  • 3A-3B are schematic diagrams of a Type A/Type B multi-carrier LBT mechanism involved in the present application.
  • FIG. 4 is a schematic diagram of a control resource set involved in the present application.
  • FIG. 5 is a schematic diagram of a mapping relationship of SS/PBCH block locations in an SS burst set window defined in the NR standard;
  • FIG. 6 is a schematic diagram of transmission of a main system message block in LTE
  • FIG. 7 is a schematic diagram of transmission of a system message block SIB 1 in LTE;
  • FIG. 8 is a schematic diagram of the relationship between the RMSI CORESET and the corresponding SS/PBCH block time-frequency mapping according to the present application;
  • FIG. 9 is a schematic diagram of a joint transmission SS/PBCH block and RMSI PDSCH existing in NR;
  • FIG. 10 is a schematic diagram of a hardware architecture of a terminal device according to an embodiment of the present application.
  • FIG. 11 is a schematic diagram of a hardware architecture of a network device according to an embodiment of the present application.
  • FIG. 12 is a schematic diagram of several DMRS configurations involved in the present application.
  • FIG. 13 is a schematic diagram of an overall process involved in an SS/PBCH block transmission scheme provided by the present application.
  • FIG. 14 is a schematic diagram of an overall process involved in another SS/PBCH block transmission scheme provided by the present application.
  • 15 is a schematic diagram of a joint sending SS/PBCH block and an RMSI PDSCH provided by the present application;
  • 16A-16B are schematic diagrams of other joint transmission SS/PBCH block and RMSI PDSCH provided by the present application;
  • 17 is a schematic diagram of the number of available RBs on a single symbol at different subcarrier intervals of different bandwidths
  • FIG. 18 is a schematic diagram of a joint transmission SS/PBCH block, RMSI CORESET, and RMSI PDSCH provided by the present application;
  • 19A-19B are schematic diagrams of other joint transmission SS/PBCH block, RMSI CORESET, and RMSI PDSCH provided by the present application;
  • 20 is a schematic diagram of a joint transmission SS/PBCH block and an RMSI PDSCH in an ECP scenario provided by the present application;
  • 21 is a schematic diagram of still another SS/PBCH block, RMSI CORESET, and RMSI PDSCH provided by the present application;
  • FIG. 22 is a schematic diagram of still another transmitting SS/PBCH block, RMSI CORESET, and RMSI PDSCH provided by the present application;
  • FIG. 22 is a schematic diagram of still another transmitting SS/PBCH block, RMSI CORESET, and RMSI PDSCH provided by the present application;
  • FIG. 23 is a schematic diagram of still another SS/PBCH block, RMSI CORESET, and RMSI PDSCH provided by the present application;
  • 24 is a schematic diagram of still another transmitting SS/PBCH block, RMSI CORESET, and RMSI PDSCH provided by the present application;
  • 25 is a schematic diagram of still another transmitting SS/PBCH block, RMSI CORESET, and RMSI PDSCH provided by the present application;
  • 26 is a schematic diagram of still another transmitting SS/PBCH block, RMSI CORESET, and RMSI PDSCH provided by the present application;
  • FIG. 27 is a schematic diagram of still another transmitting SS/PBCH block, RMSI CORESET, and RMSI PDSCH provided by the present application;
  • FIG. 28 is a schematic diagram of still another SS/PBCH block, RMSI CORESET, and RMSI PDSCH provided by the present application;
  • 29 is a schematic diagram of still another transmitting SS/PBCH block, RMSI CORESET, and RMSI PDSCH provided by the present application;
  • FIG. 30 is a schematic diagram of still another transmitting SS/PBCH block, RMSI CORESET, and RMSI PDSCH provided by the present application;
  • FIG. 31 is a schematic diagram of still another SS/PBCH block, RMSI CORESET, and RMSI PDSCH provided by the present application;
  • 32 is a functional block diagram of a wireless communication system, a terminal, and a network device provided by the present application;
  • FIG. 33 is a schematic structural diagram of a processor of the present application.
  • the wireless communication system 100 can operate in a licensed band or in an unlicensed band. As can be appreciated, the use of unlicensed frequency bands can increase the system capacity of the wireless communication system 100.
  • the wireless communication system 100 includes: one or more base stations 101, such as network devices (such as gNBs), eNodeBs or WLAN access points, one or more terminals (Terminal) 103, and Core network 115. among them:
  • Network device 101 can be used to communicate with terminal 103 under the control of a network device controller (e.g., a base station controller) (not shown).
  • a network device controller e.g., a base station controller
  • the network device controller may be part of the core network 115 or may be integrated into the network device 101.
  • the network device 101 can be used to transmit control information or user data to the core network 115 via a blackhaul interface (e.g., S1 interface) 113.
  • a blackhaul interface e.g., S1 interface
  • Network device 101 can communicate wirelessly with terminal 103 via one or more antennas. Each network device 101 can provide communication coverage for each respective coverage area 107.
  • the coverage area 107 corresponding to the access point may be divided into a plurality of sectors, wherein one sector corresponds to a part of coverage (not shown).
  • the network device 101 and the network device 101 can also communicate with each other directly or indirectly via a blackhaul link 211.
  • the backhaul link 111 may be a wired communication connection or a wireless communication connection.
  • the network device 101 may include: a base transceiver station (Base Transceiver Station), a wireless transceiver, a basic service set (BSS), and an extended service set (Extended Service Set, ESS). ), NodeB, eNodeB, network device (such as gNB) and so on.
  • the wireless communication system 100 can include several different types of network devices 101, such as a macro base station, a micro base station, and the like.
  • the network device 101 can apply different wireless technologies, such as a cell radio access technology, or a WLAN radio access technology.
  • Terminals 103 may be distributed throughout wireless communication system 100, either stationary or mobile.
  • the terminal 103 may include: a mobile device, a mobile station, a mobile unit, a wireless unit, a remote unit, a user agent, a mobile client, and the like.
  • a terminal can also be understood as a terminal device.
  • the wireless communication system 100 may be an LTE communication system capable of operating in an unlicensed frequency band, such as an LTE-U system, or a new air interface communication system capable of operating in an unlicensed frequency band, such as an NR-U system, or It is another communication system that works in the unlicensed band in the future.
  • LTE-U system capable of operating in an unlicensed frequency band
  • NR-U system a new air interface communication system capable of operating in an unlicensed frequency band
  • the wireless communication system 100 can also include a WiFi network.
  • the NR-U system adopts the LBT channel contention access mechanism, and the LBT process and parameters are specified in the R13 version of 3GPP.
  • Figures 3A-3B illustrate two types of LBT listening mechanisms.
  • the Type A LBT device can perform independent backoff on multiple component carriers (CCs).
  • CCs component carriers
  • the backoff is completed on a certain carrier, the transmission is delayed to wait for others to be retired. Member carrier.
  • the device needs to perform an additional one-shot CCA (25us clear channel assessment) to ensure that all carriers are idle; if all carriers are idle, the eNB transmits simultaneously on the idle carriers.
  • the Type B LBT device performs backoff only on a selected component carrier, and performs one-shot CCA (25us clear channel assessment) on other component carriers when the backoff ends. If the component carrier is idle, data transmission is performed; if the component carrier is not idle, data transmission cannot be performed on the component carrier at this time.
  • CCA 25us clear channel assessment
  • the LBT-enabled device can be LTE LAA, WiFi, NR-U or other communication device operating in an unlicensed frequency band.
  • the interference received by the device in the LBT is from the WiFi system.
  • the interference received by the LBT device may also come from the LTE LAA, NR-U or other communication system operating in the unlicensed frequency band. This is not a limitation.
  • the LBT listening mechanism employed by the NR-U system may also vary without affecting the implementation of the present application.
  • the network device 101 can transmit wireless signals using different directed beams, such as SS/PBCH block, remaining minimum system information (RMSI) control resource set (CORESET), RMSI PDSCH.
  • RMSI remaining minimum system information
  • CORESET remaining minimum system information control resource set
  • RMSI PDSCH RMSI PDSCH indicated by the RMSI CORESET corresponding to one SS/PBCH block and the SS/PBCH block jointly carry system information for the user to perform random access.
  • An SS/PBCH block and the RMSI CORESET and RMSI PDSCH corresponding to the SS/PBCH block correspond to the same user, that is, the two correspond to the same beam.
  • the NR system operating in the licensed band specifies that 8 bits in the PBCH are used to indicate the time-frequency resource location of the RMSI CORESET.
  • the terminal can receive and demodulate the RMSI CORESET according to the 8 bits in the PBCH, and then obtain the time-frequency resource location of the RMSI PDSCH through the indication information (such as DCI) carried by the RMSI CORESET, and finally obtain the location.
  • the RMSI carried by the RMSI PDSCH finally obtains resource configuration information of a physical random access channel (PRACH).
  • PRACH physical random access channel
  • FIG. 4 exemplarily shows a control resource set (CORESET) related to the present application.
  • a CORESET is a time-frequency resource including a plurality of resource elements (REs).
  • a CORESET corresponds to a group of terminals (such as UE1, UE2, UE3, etc.).
  • the physical downlink control channel (PDCCH) of this group of users is sent on this CORESET.
  • Each user has a search space on a CORESET whose resources are less than or equal to the resources of the CORESET.
  • the search space is a set of candidate PDCCHs (PDCCH candidates) that the user needs to monitor.
  • the PDCCH candidate is the location where the PDCCH may appear in the control region (eg, the first 4 symbols in one subframe).
  • the aggregation level of CORESET is specified in NR. As shown in Table 1, the RMSI CORESET supports a total of five different aggregation levels, corresponding to different sizes of control channel elements (CCEs). Each CCE occupies 6 RB resources, and the entire CORESET may occupy 6, 12, 24, 48, and 96 RB resources. In a scenario where the system bandwidth is 20 MHz and the subcarrier spacing is 60 kHz, the 20 MHz channel contains a total of 24 RBs, so the duration of the RMSI CORESET may be 1, 2 or 4 OFDM symbols.
  • CCEs control channel elements
  • the time domain resource mapping pattern of the SS/PBCH block has been defined in the NR system operating in the licensed band. This style indicates the time position at which the SS/PBCH block may appear in the SS burst set window.
  • a series of time positions at which SS/PBCH blocks may appear may be referred to as candidate SS/PBCH blocks.
  • the number of candidate SS/PBCH blocks (SS/PBCH block candidate) and the start symbol of the candidate SS/PBCH block is determined by the subcarrier spacing (SCS) of the SS/PBCH block as follows:
  • the index of the start symbol of the candidate SS/PBCH block includes: ⁇ 2, 8 ⁇ + 14*n.
  • n 0, 1;
  • n 0, 1, 2, 3;
  • the index of the start symbol of the candidate SS/PBCH block includes: ⁇ 4, 8, 16, 20 ⁇ + 28 * n.
  • the index of the starting symbol of the candidate SS/PBCH block includes: ⁇ 2, 8 ⁇ + 14*n.
  • n 0, 1;
  • n 0, 1, 2, 3;
  • SCS 120KHz:
  • the index of the starting symbol of the candidate SS/PBCH block includes: ⁇ 4, 8, 16, 20 ⁇ + 28*n.
  • n 0, 1, 2, 3, 5, 6, 7, 8, 10, 11, 12, 13, 15, 16, 17, 18;
  • SCS 240KHz:
  • the index of the starting symbol of the candidate SS/PBCH block includes: ⁇ 8, 12, 16, 20, 32, 36, 40, 44 ⁇ + 56 * n.
  • n 0, 1, 2, 3, 5, 6, 7, 8.
  • the candidate SS/PBCH block in the SS burst set window is numbered 0 to L-1 in time ascending order; L is a positive integer, and its value may be equal to 4 or greater than 4 (but not more than 64). These numbers are also known as time indexes.
  • the NR specifies that the time index is carried in the SS/PBCH block to indicate the time position of the SS/PBCH block in the SS burst set window.
  • the preset time position (ie candidate SS/PBCH block) for transmitting the SS/PBCH block in the SS burst set window has been specified in the NR. That is to say, all SS/PBCH blocks are only sent at a fixed time position (slot/symbol), and the time index in the SS/PBCH block can be used to indicate that the current SS/PBCH block is in the SS burst. The sequence number in the set window.
  • the terminal when the terminal detects an SS/PBCH block, the terminal can determine, according to the time index carried by the PBCH in the SS/PBCH block, which SS/PBCH block corresponds in the SS burst set window. A preset time position, thereby determining the symbols occupied by the system timing information in the SS burst set window (ie, the PSS symbols and SSS symbols in the SS/PBCH block).
  • the terminal may determine, according to the half frame indication carried by the PBCH in the SS/PBCH block, that the SS burst set window in which the SS/PBCH block is located is located in the first 5 ms of the 10 ms radio frame or After 5ms. In this way, the terminal can correctly receive the system timing information sent by the network device (such as a network device (such as gNB)), and complete synchronization between the terminal and the network device.
  • the network device such as a network device (such as gNB)
  • system information includes a main system information block (MIB) and a number of system information blocks (SIBs).
  • MIB main system information block
  • SIBs system information blocks
  • FIG. 6 the time position of the MIB mapping in the 80 ms time window remains unchanged, and is repeatedly transmitted 4 times in 80 ms, and occupies a frequency domain resource of 72 subcarriers on both sides of the channel center bandwidth.
  • the MIB carries basic information required for the user to perform random access, and resource indication information (such as resource location and resource size, etc.) of the SIB 1.
  • SIB 1 carries a part of system information and scheduling information of other SIBs (such as SIB2-SIB13).
  • the transmission mode of SIB 1 in LTE is as shown in 7.
  • the time position of SIB 1 mapped in the 80 ms time window remains unchanged, and is transmitted four times in 80 ms.
  • the transmitted time position is located in the 5th radio frame within 10 ms. Subframes.
  • system information includes a main system information block (MIB), remaining minimum system information (RMSI), and other system information (OSI).
  • MIB is carried in the physical broadcast channel PBCH
  • RMSI is carried in the RMSI physical downlink shared channel (PDSCH).
  • PDSCH physical downlink shared channel
  • RMSI is similar to SIB 1 in LTE. The difference between the two is that the time position of transmitting SIB 1 is fixed, and the NRI PDSCH resource location and resource size are variable in order to improve the flexibility of system scheduling.
  • RMSICORESET Instructions As shown in FIG. 8, the RMSI CORESET and the RMSI PDSCH corresponding to the SS/PBCH block and the SS/PBCH block have three resource mapping modes.
  • the RMSI CORESETR/RMSI PDSCH and the SS/PBCH block may be multiplexed resources in a manner of time division multiplexing or frequency division multiplexing.
  • the resource indication information of the RMSI CORESET is carried in the PBCH and has 8 bits in total.
  • the network device can occupy the channel to send downlink data, such as an SS/PBCH block.
  • the maximum channel occupancy time (MCOT) allowed for one LBT listening success is limited, for example, the MCOT is 10 ms.
  • the network device does not send a downlink signal in one (s) time slot after the LBT is successfully detected, the channel may be idle, and the other device may compete for the channel, thereby losing the channel.
  • the lost channel means that the network device that has successfully accessed the channel loses the channel access right, and needs to re-execute the LBT before re-accessing the channel.
  • the RMSI PDSCH resource configuration manner in the NR cannot guarantee that the SS/PBCH block and its corresponding RMSI PDSCH are mapped on consecutive time resources because the resource location of the RMSI PDSCH in the NR is very flexible.
  • the network device after the LBT is successfully detected may lose the channel access right after the SS/PBCH block is sent, and the RMSI PDSCH corresponding to the SS/PBCH block may be sent after the LBT is successfully detected. . That is to say, the system information cannot be completely transmitted in one time, which reduces the efficiency of the terminal device accessing the system.
  • one-time means that LBT listening is successful once.
  • FIG. 9 shows a conventional SS/PBCH block and RMSIPDSCH joint transmission method in the NR-U.
  • the 20 MHz channel includes 24 available RBs.
  • the SS/PBCH block occupies the symbol 2-5. Among them, on symbol 2, the SS/PBCH block occupies 12 RBs in the frequency domain. On the next three symbols, the SS/PBCH block occupies 20 RBs in the frequency domain.
  • the NR-U device may fill the RMSI PDSCH on both sides of the subcarrier occupied by the SS/PBCH block so that the downlink data fills 24 RBs. That is to say, on symbols 2-5, the SS/PBCH block and the RMSIPDSCH can adopt a frequency division multiplexing resource mapping manner.
  • the SS/PBCH block and the RMSI PDSCH are mapped on the same symbol, and it can be ensured that both are simultaneously transmitted.
  • the number of bits of the RMSI PDSCH that can be carried by this resource mapping method is very limited, and is about tens of bits, which is far from solving the resource mapping problem of the RMSI PDSCH payload of about 1000 bits or more.
  • the present application will mainly consider how the resource mapping of the SS/PBCH block and its corresponding RMSI PDSCH when time division multiplexing is used should be performed to avoid resource loss.
  • the present application provides a technical solution for transmitting an SS/PBCH block and its corresponding RMSI PDSCH in an NR-U system.
  • the terminal 300 may include: an input and output module (including an audio input and output module 318, a key input module 316, and a display 320, etc.), a user interface 302, one or more terminal processors 304, a transmitter 306, and a receiving The 308, the coupler 310, the antenna 314, and the memory 312. These components can be connected by bus or other means, and FIG. 10 is exemplified by a bus connection. among them:
  • Communication interface 301 can be used by terminal 300 to communicate with other communication devices, such as base stations.
  • the base station may be the network device 400 shown in FIG.
  • Communication interface 301 refers to an interface between terminal processor 304 and a transceiver system (consisting of transmitter 306 and receiver 308), such as the X1 interface in LTE.
  • the communication interface 301 may include: a Global System for Mobile Communication (GSM) (2G) communication interface, a Wideband Code Division Multiple Access (WCDMA) (3G) communication interface, and One or more of the Long Term Evolution (LTE) (4G) communication interfaces and the like may also be a communication interface of 4.5G, 5G or a future new air interface.
  • the terminal 300 may be configured with a wired communication interface 301, such as a Local Access Network (LAN) interface.
  • LAN Local Access Network
  • the antenna 314 can be used to convert electromagnetic energy in a transmission line into electromagnetic waves in free space, or to convert electromagnetic waves in free space into electromagnetic energy in a transmission line.
  • the coupler 310 is configured to divide the mobile communication signal received by the antenna 314 into multiple channels and distribute it to a plurality of receivers 308.
  • Transmitter 306 can be used to transmit signals to signals output by terminal processor 304, such as modulating the signal in a licensed band or modulating a signal in an unlicensed band.
  • the transmitter 306 can support the terminal 300 to transmit signals on one or more unlicensed spectrums, or can support the terminal 300 to transmit signals on one or more licensed spectrums.
  • Receiver 308 can be used to perform reception processing on the mobile communication signals received by antenna 314.
  • the receiver 308 can demodulate a received signal that has been modulated on an unlicensed band, and can also demodulate a received signal that is modulated on a licensed band.
  • the receiver 308 can support the terminal 300 to receive signals modulated on the unlicensed spectrum, or can support the terminal 300 to receive signals modulated on the licensed spectrum.
  • transmitter 306 and receiver 308 can be viewed as a wireless modem.
  • the number of the transmitter 306 and the receiver 308 may each be one or more.
  • the terminal 300 may further include other communication components such as a GPS module, a Bluetooth module, a Wireless Fidelity (Wi-Fi) module, and the like. Not limited to the above-described wireless communication signals, the terminal 300 can also support other wireless communication signals such as satellite signals, short-wave signals, and the like. Not limited to wireless communication, the terminal 300 may be configured with a wired network interface (such as a LAN interface) to support wired communication.
  • a wired network interface such as a LAN interface
  • the input and output module can be used to implement interaction between the terminal 300 and the user/external environment, and can mainly include an audio input and output module 318, a key input module 316, a display 320, and the like.
  • the input and output module may further include: a camera, a touch screen, a sensor, and the like.
  • the input and output modules communicate with the terminal processor 304 through the user interface 302.
  • Memory 312 is coupled to terminal processor 304 for storing various software programs and/or sets of instructions.
  • memory 312 can include high speed random access memory, and can also include non-volatile memory, such as one or more magnetic disk storage devices, flash memory devices, or other non-volatile solid state storage devices.
  • the memory 312 can store an operating system (hereinafter referred to as a system) such as an embedded operating system such as ANDROID, IOS, WINDOWS, or LINUX.
  • the memory 312 can also store a network communication program that can be used to communicate with one or more additional devices, one or more terminal devices, one or more network devices.
  • the memory 312 can also store a user interface program, which can realistically display the content image of the application through a graphical operation interface, and receive user control operations on the application through input controls such as menus, dialog boxes, and keys. .
  • the memory 312 can be used to store an implementation of the signal transmission method provided by one or more embodiments of the present application on the terminal 300 side.
  • the signal transmission method provided by one or more embodiments of the present application please refer to the subsequent embodiments.
  • Terminal processor 304 can be used to read and execute computer readable instructions. Specifically, the terminal processor 304 can be used to invoke a program stored in the memory 312, such as the implementation of the signal transmission method provided by one or more embodiments of the present application on the terminal 300 side, and execute the instructions contained in the program.
  • the terminal processor 304 can be a modem (Modem) processor and is a module that implements the main functions in the wireless communication standards such as 3GPP and ETSI.
  • the Modem can be used as a stand-alone chip or as a system-on-chip or integrated circuit with other chips or circuits. These chips or integrated circuits can be applied to all devices that implement wireless communication functions, including: mobile phones, computers, notebooks, tablets, routers, wearable devices, automobiles, home appliances, and the like.
  • the terminal processor 304 processor may be a separate chip coupled to the off-chip memory, that is, the memory is not included in the chip; or the terminal processor 304 processor is coupled to the on-chip memory. Integrated in the chip, that is, the memory is included in the chip.
  • the terminal 300 can be the terminal 103 in the wireless communication system 100 shown in FIG. 2, and can be implemented as a mobile device, a mobile station, a mobile unit, a wireless unit, a remote unit, and a user agent. , mobile client and more.
  • the terminal 300 shown in FIG. 10 is only one implementation of the present application. In an actual application, the terminal 300 may further include more or fewer components, which are not limited herein.
  • FIG. 11 illustrates a network device 400 provided by some embodiments of the present application.
  • network device 400 can include a communication interface 403, one or more network device processors 401, a transmitter 407, a receiver 409, a coupler 411, an antenna 413, and a memory 405. These components can be connected by bus or other means, and FIG. 11 is exemplified by a bus connection. among them:
  • Communication interface 403 can be used by network device 400 to communicate with other communication devices, such as terminal devices or other base stations.
  • the terminal device may be the terminal 300 shown in FIG. 9.
  • Communication interface 301 refers to an interface between network device processor 401 and a transceiver system (consisting of transmitter 407 and receiver 409), such as the S1 interface in LTE.
  • the communication interface 403 may include: a Global System for Mobile Communications (GSM) (2G) communication interface, a Wideband Code Division Multiple Access (WCDMA) (3G) communication interface, and a Long Term Evolution (LTE) (4G) communication interface, etc.
  • GSM Global System for Mobile Communications
  • WCDMA Wideband Code Division Multiple Access
  • LTE Long Term Evolution
  • the network device 400 may also be configured with a wired communication interface 403 to support wired communication.
  • the backhaul link between one network device 400 and other network devices 400 may be a wired communication connection.
  • the antenna 413 can be used to convert electromagnetic energy in a transmission line into electromagnetic waves in free space, or to convert electromagnetic waves in free space into electromagnetic energy in a transmission line.
  • the coupler 411 can be used to divide the mobile pass signal into multiple channels and distribute it to a plurality of receivers 409.
  • Transmitter 407 can be used to transmit signals to signals output by network device processor 401, such as to modulate signals in licensed bands or to modulate signals in unlicensed bands.
  • the transmitter 407 can support the network device 400 to transmit signals on one or more unlicensed spectrums, or can also support the network device 400 to transmit signals on one or more licensed spectrums.
  • the receiver 409 can be used to perform reception processing on the mobile communication signal received by the antenna 413.
  • the receiver 409 can demodulate a received signal that has been modulated on an unlicensed band, and can also demodulate a received signal that is modulated on a licensed band.
  • the receiver 409 can support the network device 400 to receive signals modulated on the unlicensed spectrum, or can also support the network device 400 to receive signals modulated on the licensed spectrum.
  • transmitter 407 and receiver 409 can be viewed as a wireless modem.
  • the number of the transmitter 407 and the receiver 409 may each be one or more.
  • Memory 405 is coupled to network device processor 401 for storing various software programs and/or sets of instructions.
  • memory 405 can include high speed random access memory, and can also include non-volatile memory, such as one or more magnetic disk storage devices, flash memory devices, or other non-volatile solid state storage devices.
  • the memory 405 can store an operating system (hereinafter referred to as a system) such as an embedded operating system such as uCOS, VxWorks, or RTLinux.
  • the memory 405 can also store a network communication program that can be used to communicate with one or more additional devices, one or more terminal devices, one or more network devices.
  • the network device processor 401 can be used to perform wireless channel management, implement call and communication link establishment and teardown, and control the handoff of user equipment in the control area.
  • the network device processor 401 may include: an Administration Module/Communication Module (AM/CM) (a center for voice exchange and information exchange), and a Basic Module (BM). Complete call processing, signaling processing, radio resource management, radio link management and circuit maintenance functions, Transcoder and SubMultiplexer (TCSM) (for multiplexing demultiplexing and code conversion) Function) and so on.
  • AM/CM Administration Module/Communication Module
  • BM Basic Module
  • TCSM Transcoder and SubMultiplexer
  • network device processor 401 can be used to read and execute computer readable instructions. Specifically, the network device processor 401 can be used to invoke a program stored in the memory 405, for example, the implementation of the signal transmission method provided by one or more embodiments of the present application on the network device 400 side, and execute the instructions included in the program. .
  • the network device processor 401 may be a modem (Modem) processor, and is a module that implements main functions in a wireless communication standard such as 3GPP, ETSI, and the like.
  • the Modem can be used as a stand-alone chip or as a system-on-chip or integrated circuit with other chips or circuits. These chips or integrated circuits can be applied to all network side devices that implement wireless communication functions, for example, in an LTE network, called an evolved Node B (eNB or eNodeB), in the third generation (the 3rd Generation, 3G) In the network, it is called Node B (Node B), etc.
  • eNB evolved Node B
  • 3G 3rd Generation
  • 5G 5G base station
  • 5G base station 5G base station
  • the network device processor 401 may be a separate chip coupled to the off-chip memory, that is, the memory is not included in the chip; or the network device processor 401 processor is coupled to the on-chip memory. Integrated in the chip, that is, the memory is included in the chip.
  • the network device 400 can be the network device 101 in the wireless communication system 100 shown in FIG. 2, and can be implemented as a base transceiver station, a wireless transceiver, a basic service set (BSS), and an extended service set (ESS). , NodeB, eNodeB, etc.
  • Network device 400 can be implemented as several different types of base stations, such as macro base stations, micro base stations, and the like.
  • Network device 400 can apply different wireless technologies, such as cell radio access technology, or WLAN radio access technology.
  • the network device 400 shown in FIG. 11 is only one implementation of the present application. In actual applications, the network device 400 may further include more or fewer components, which are not limited herein.
  • the present application provides a signal transmission method, which provides a communication system operating in an unlicensed frequency band (subsequent content is an NR-U system Example)
  • a technical solution for transmitting SS/PBCH block and RMSIPDSCH is an NR-U system Example.
  • the main inventive idea of one aspect of the present application may include that there is no blank symbol (ie, a symbol that does not carry a downlink signal) between a time position at which the SS/PBCH block is transmitted and a time position at which the RMSI PDSCH corresponding to the SS/PBCH block is transmitted. To avoid channel loss, ensure that system information is completely sent after an LBT listening success.
  • the main scheme can be as follows:
  • Solution 1 The time position of the RMSI PDSCH corresponding to the SS/PBCH block is consecutively adjacent to the time position of the SS/PBCH block, where the SSB is carried in the SS/PBCH block, and the RMSI is carried in the RMSI PDSCH.
  • RMSI CORESET is not required to indicate the resource configuration of the RMSI PDSCH, and the SS/PBCH block carries indication information to indicate the resource configuration of the RMSI PDSCH.
  • Solution 2 The time position of sending the SS/PBCH block, the time position of sending the RMSI CORESET corresponding to the SS/PBCH block, and the time position of the RMSI PDSCH corresponding to the SS/PBCH block are consecutively adjacent, where the SS/PBCH block is in the SS/PBCH block.
  • the MIB is carried, and the RMSI is carried in the RMSI PDSCH.
  • the resource configuration of the RMSI CORESET is indicated by the PBCH in the SS/PBCH block
  • the resource configuration of the RMSI PDSCH is indicated by the RMSI CORESET.
  • scheme 1 does not require RMSI CORESET to indicate the resource configuration of the RMSI PDSCH, which can save signaling overhead.
  • the time position at which the SS/PBCH block is transmitted refers to the symbol range in which the SS/PBCH block continues (such as the four symbols specified in NR).
  • the time position at which the RMSI PDSCH is transmitted refers to the symbol range in which the RMSI PDSCH that is time-division multiplexed with the SS/PBCH block continues.
  • the time position of the RMSI PDSCH corresponding to the SS/PBCH block and the time position of the SS/PBCH block are consecutively adjacent, which means that the next symbol of the last symbol occupied by the SS/PBCH block is occupied by the RMSI PDSCH.
  • the first symbol For example, one SS/PBCH block occupies symbols 0-3, and the RMSI PDSCH corresponding to the SS/PBCH block occupies symbols 4-27. That is to say, the time position at which the RMSI PDSCH is transmitted is immediately adjacent to the time position at which the SS/PBCH block is transmitted.
  • the time position of sending the SS/PBCH block (bearing MIB), the time position of sending the RMSI CORESET corresponding to the SS/PBCH block, and the time position of sending the RMSI PDSCH (bearing RMSI) corresponding to the SS/PBCH block
  • Continuous neighboring means that the next symbol of the last symbol occupied by the SS/PBCH block is the first symbol occupied by the RMSI CORESET, and the next symbol of the last symbol occupied by the RMSI CORESET is the RMSI PDSCH occupied by the first symbol. a symbol.
  • one SS/PBCH block occupies the symbol 0-3, and the RMSI CORESET corresponding to the SS/PBCH block occupies the symbol 4-7, and the RMSI PDSCH corresponding to the SS/PBCH block occupies the symbol 8-27. That is to say, the time position at which the SS/PBCH block is transmitted is immediately adjacent to the time position at which the RMSI PDSCH is transmitted, and the time position at which the RMSI PDSCH is transmitted is immediately adjacent to the SS/PBCH block. Time location.
  • the main factors affecting the resource mapping manner of the SS/PBCH block and the RMSI PDSCH may include but are not limited to:
  • a preset time position corresponding to each of the one or more SS/PBCH blocks may be set in a time window of a specific length (such as a 1 ms time window).
  • the time position of sending the SS/PBCH block may be a preset preset time position of the SS/PBCH block in a time window of a specific length. That is, the SS/PBCH block is transmitted at a fixed location.
  • the time position of sending the SS/PBCH block may not be the preset preset time position of the SS/PBCH block in a time window of a specific length. That is, the SS/PBCH block is not sent at a fixed location.
  • the time window of the specific length may be referred to as a first time window.
  • the duration of the first time window can be longer (eg 2ms) or shorter (eg 0.5ms), no application is not limited.
  • the time position for sending the SS/PBCH block will be described in detail in the following embodiments, and will not be described here.
  • the duration of the RMSI PDSCH can be related to the following: the size of the payload of the RMSI PDSCH, the modulation and coding scheme (MCS) used by the RMSIPDSCH, and the resources of the demodulation reference signal (DMRS) in the RMSI PDSCH.
  • MCS modulation and coding scheme
  • DMRS demodulation reference signal
  • the payload of RMSI PDSCH contains approximately 1700 bits of information. Some of these information elements are optional. When the network device does not transmit these optional information elements, the size of the payload of the RMSI PDSCH is approximately 1000 bits.
  • the modulation order of RMSI PDSCH is fixed at 2.
  • the modulation coding scheme (MCS) and spectral efficiency (ie, the number of bits that can be carried on one subcarrier) corresponding to the RMSI PDSCH can be as shown in Table 2.
  • the number of bits that can be carried by one RB on a single symbol can be calculated according to the spectral efficiency in Table 2, and further Calculate the number of bits that a single symbol (such as 24 RBs) can carry, and finally calculate how many symbols the RMSI PDSCH payload of a given size (such as 1700 bits) needs to last.
  • the additional 1650-bit RMSI PDSCHpayload persistent symbol number can include the following options:
  • Option 1 When using the 1 symbol DMRS configuration Type 1, the RMSI PDSCH lasts 27 OFDM symbols;
  • the RMSI PDSCH When using the 2 symbol DMRS configuration Type 1, the RMSI PDSCH lasts 27 OFDM symbols;
  • Option 3 When using the 1 symbol DMRS configuration Type 2, the RMSI PDSCH continues for 26 OFDM symbols;
  • the RMSI PDSCH When using the 2 symbol DMRS configuration Type 2, the RMSI PDSCH lasts 26 OFDM symbols.
  • the additional 950-bit RMSI PDSCHpayload persistent symbol number can include the following options:
  • Option 1 When using the 1 symbol DMRS configuration Type 1, the RMSI PDSCH lasts 16 OFDM symbols;
  • Option 2 When using the 2 symbol DMRS configuration Type 1, the RMSI PDSCH continues for 17 OFDM symbols;
  • Option 3 When using the 1 symbol DMRS configuration Type 2, the RMSI PDSCH continues for 15 OFDM symbols;
  • the RMSI PDSCH When using the 2 symbol DMRS configuration Type 2, the RMSI PDSCH lasts 16 OFDM symbols.
  • the additional 950-bit RMSI PDSCHpayload persistent symbol number can include the following options:
  • Option 1 When using the 1 symbol DMRS configuration Type 1, the RMSI PDSCH continues for 20 OFDM symbols;
  • Option 2 When using the 2 symbol DMRS configuration Type 1, the RMSI PDSCH continues for 21 OFDM symbols;
  • Option 3 When using the 1 symbol DMRS configuration Type 2, the RMSI PDSCH continues for 20 OFDM symbols;
  • Option 4 When using the 2 symbol DMRS configuration Type 2, the RMSI PDSCH continues for 20 OFDM symbols.
  • the RMSI PDSCH persistent symbol number is for the RMSI PDSCH transmitted with the SS/PBCH block in time division multiplexing mode, and does not involve frequency division multiplexing together with the SS/PBCH block. Send tens of bits (such as 50 bits or 66 bits, etc.).
  • Figure 13 shows the overall flow involved in scenario one. Specifically include:
  • the network device performs LBT. If the LBT is successful, S102 is performed.
  • the network device can perform the LBT according to the LBT mechanism shown in FIG. 3A-3B.
  • the LBT listening mechanism adopted by the network device may also change, and does not affect the implementation of the present application.
  • the network device After the LBT succeeds, the network device sends the SS/PBCH block and the RMSI PDSCH corresponding to the SS/PBCH block.
  • the time position at which the SS/PBCH block is transmitted and the time position at which the RMSI PDSCH corresponding to the SS/PBCH block are transmitted are consecutively adjacent.
  • the terminal receives the SS/PBCH block sent by the network device and the RMSI PDSCH corresponding to the SS/PBCH block.
  • the time position of receiving the SS/PBCH block and the time position of receiving the RMSI PDSCH corresponding to the SS/PBCH block are consecutively adjacent.
  • the time position of transmitting the SS/PBCH block and the time position of the RMSI PDSCH corresponding to the SS/PBCH block are consecutively adjacent. Therefore, the network device can be prevented from losing the channel, and the system information can be completely transmitted at one time, thereby improving the initial access efficiency of the terminal device.
  • the subsequent embodiments will describe the SS/PBCH block in the first scheme and the corresponding RMSIPDSCH transmission method, which are not described here.
  • the SS/PBCH block carries the indication information to indicate the resource configuration of the RMSI PDSCH, and the RMSI CORESET is not needed to indicate the resource configuration of the RMSI PDSCH, which can save signaling overhead.
  • the terminal can receive and demodulate the RMSI PDSCH according to the indication information carried in the SS/PBCH block, obtain the RMSI carried in the RMSI PDSCH, and finally combine the MIB carried in the SS/PBCH block. Obtain the resource configuration information of the PRACH.
  • the resource configuration information of the PRACH is used by the terminal for subsequent initial access procedures.
  • the indication information may be referred to as first indication information.
  • the first indication information may specifically be 8 bits in the PBCH in the SS/PBCH block, which are specified in the NR to indicate the resource configuration of the RMSI CORESET.
  • the terminal sends a random access preamble (preamble).
  • the network device sends a random access response (RAR).
  • RAR random access response
  • the terminal sends a radio resource control (RRC) connection request (RRC connection request).
  • RRC radio resource control
  • the network device sends a contention resolution.
  • FIG. 13 also illustrates an application scenario involved in the SS/PBCH block and RMSI PDSCH transmission scheme provided by the present application, that is, a random access scenario in a communication system operating in an unlicensed frequency band. Not limited to FIG. 13, before the random access procedure, other processes, such as random access preparation, may be performed between the network device and the terminal.
  • Figure 14 shows the overall flow involved in scenario two. Specifically include:
  • S201 The network device performs LBT. If the LBT is successful, S202 is performed.
  • the network device can perform the LBT according to the LBT mechanism shown in FIG. 3A-3B.
  • the LBT listening mechanism adopted by the network device may also change, and does not affect the implementation of the present application.
  • the network device After the LBT succeeds, the network device sends an SS/PBCH block, and an RMSI CORESET and an RMSI PDSCH corresponding to the SS/PBCH block.
  • the time position at which the SS/PBCH block is transmitted, the time position at which the RMSI CORESET corresponding to the SS/PBCH block is transmitted, and the time position at which the RMSI PDSCH corresponding to the SS/PBCH block are transmitted are consecutively adjacent.
  • the terminal receives the SS/PBCH block sent by the network device, and the RMSI CORESET and RMSI PDSCH corresponding to the SS/PBCH block.
  • the time position of receiving the SS/PBCH block, the time position of receiving the RMSI CORESET corresponding to the SS/PBCH block, and the time position of receiving the RMSI PDSCH corresponding to the SS/PBCH block are consecutively adjacent.
  • the time position of transmitting the SS/PBCH block, the time position of transmitting the RMSI CORESET corresponding to the SS/PBCH block, and the time position of transmitting the RMSI PDSCH corresponding to the SS/PBCH block are consecutively adjacent. Therefore, the network device can be prevented from losing the channel, and the system information can be completely transmitted at one time, thereby improving the initial access efficiency of the terminal device.
  • the subsequent embodiments will detail the SS/PBCH block in the second scheme and the corresponding RMSI CORESET and RMSIPDSCH transmission methods, which are not described here.
  • the resource configuration of the RMSICORESET is indicated by the PBCH in the SS/PBCH block
  • the resource configuration of the RMSI PDSCH is indicated by the RMSI CORESET.
  • the terminal can receive and demodulate the RMSI CORESET according to the PBCH in the SS/PBCH block, then receive and demodulate the RMSI PDSCH according to the RMSI CORESET, obtain the RMSI carried in the RMSI PDSCH, and finally obtain the MIB carried in the SS/PBCH block.
  • Resource configuration information of PRACH is used by the terminal for subsequent initial access procedures.
  • the terminal sends a random access preamble (preamble).
  • the network device sends a random access response.
  • the terminal sends a radio resource control (RRC) connection request (RRC connection request).
  • RRC radio resource control
  • the network device sends a contention resolution.
  • FIG. 14 also illustrates an application scenario involved in the SS/PBCH block, RMSI CORESET, and RMSI PDSCH transmission schemes provided by the present application, that is, a random access scenario in a communication system operating in an unlicensed frequency band.
  • other processes such as random access preparation, may be performed between the network device and the terminal before the random access procedure.
  • the first time is that the time position of the RMSIPDSCH corresponding to the SS/PBCH block and the time position of the SS/PBCH block are consecutively adjacent.
  • the SS/PBCH block may be any SS/PBCH block to be transmitted.
  • Figure 15 exemplarily shows one possible resource mapping pattern.
  • the initial bandwidth part (BWP) is 20 MHz and the subcarrier spacing is 60 kHz
  • the 1 ms time window contains 2 SS/PBCH blocks.
  • SS/PBCH block1 and SS/PBCH block2 and the RMSI PDSCH corresponding to each of the two SS/PBCH blocks.
  • the two SS/PBCH blocks each last for 4 symbols, and the two SS/PBCH blocks are respectively transmitted at the following time positions: symbol 0-3 and symbol 28-31, and their respective RMSI PDSCH are respectively at the following times
  • the location is sent: symbols 4-27 and symbols 32-55.
  • SS/PBCH block1 and its corresponding RMSI PDSCH1 are consecutively adjacent, and SS/PBCH block 2 and its corresponding RMSI PDSCH2 are consecutively adjacent.
  • the network device can be prevented from losing the channel, and the complete system information carried by the SS/PBCH block1 and its corresponding RMSI PDSCH1 can be completely transmitted in one time, and the SS/PBCH block2 and its corresponding RMSI PDSCH2 are carried together.
  • the system information is completely transmitted in one time, improving the initial access efficiency of the terminal device.
  • the RMSI PDSCH occupies the entire initial bandwidth of 20 MHz (including 24 RBs).
  • the initial partial bandwidth (BWP) refers to the bandwidth that the network device allows access after the LBT succeeds. That is to say, on the RMSI PDSCH persistent symbol, the RMSI PDSCH can occupy the entire initial part of the bandwidth in the frequency domain, and the channel bandwidth occupancy rate is 100%. In this way, the transmission of the RMSI PDSCH can be made to meet the OCB requirement, and the resource occupation indicating the RMSI PDSCH in the frequency domain can be avoided, and the signaling overhead is saved.
  • the partial RMSI PDSCH may be used to fill the RB that is not occupied by the SS/PBCH block, and the receiving effect of the enhanced partial RMSI PDSCH may be achieved.
  • the resource configuration of the RMSI CORESET indicated by the PBCH has been specified in the NR, and the configuration information (including the time-frequency resource location and the MCS, etc.) of the RMSI PDSCH is indicated by the indication information (such as DCI) carried by the RMSI CORESET.
  • the indication information such as DCI
  • the RMSI CORESET is not required to indicate the resource configuration of the RMSI PDSCH, and the SS/PBCH block carries the indication information (ie, the first indication information) to indicate the resource configuration of the RMSI PDSCH.
  • the indication information ie, the first indication information
  • the typical RMSI CORESET defined in NR contains the following information:
  • PUCCH resource indicator upstream control information resource indication
  • the necessary information to indicate the configuration information of the RMSI PDSCH includes only:
  • the RMSI PDSCH is transmitted using a lower MCS (such as MCS 0 or MCS 1/2/). 3). It can be understood that a lower MCS (such as MCS 0 or MCS 1/2/3) only needs 1 or 2 bit indication.
  • the RMSI PDSCH can occupy the entire initial part of the bandwidth in the frequency domain (as shown in Figure 15), that is, the frequency domain resource occupation of the RMSI PDSCH.
  • the situation does not need to be indicated.
  • different MCSs may cause the RMSI PDSCH to continue to have different symbol numbers.
  • the PDSCH continues for 27/26/16/17/15/20/21 OFDM symbols.
  • the time domain resource allocation of the RMSI PDSCH (“time domain resource assignment”) may be indicated by 1-3 bits.
  • the 8 bits in the PBCH are specified in the NR to indicate the time-frequency resource location of the RMSI CORESET.
  • the RMSI CORESET is not required to indicate the resource configuration of the RMSI PDSCH, and the 8 bits in the PBCH are used to indicate the above-mentioned necessary information. That is to say, the 8 bits in the PBCH can be used to indicate the resource configuration of the RMSI PDSCH, and can be used to indicate the duration of the RMSI PDSCH (such as the number of symbols that are continued). That is, the first indication information carried in the SS/PBCH block may be the 8 bits in the PBCH.
  • the RMSI CORESET is not required to indicate the resource configuration of the RMSI PDSCH, the 8 bits in the PBCH are used to indicate the resource configuration of the RMSI PDSCH. Therefore, after receiving the SS/PBCH block, the terminal can receive and demodulate the RMSI PDSCH according to the 8 bits, thereby obtaining the RMSI carried in the RMSI PDSCH.
  • the manner of indicating the resource configuration of the RMSI PDSCH provided in Embodiment 1 can reduce the step of the terminal device obtaining the system information RMSI, and also because the elimination is performed.
  • RMSI CORESET saves signaling overhead.
  • Table 3 exemplarily shows several RMSI PDSCH configurations indicated by the first indication information (8 bits in the PBCH).
  • Configuration index Frequency domain resources occupied by RMSI RMSI continuous symbol number Modulation coding 0 twenty four 16 0 1 twenty four 17 0 2 twenty four 20 1 3 twenty four twenty one 1
  • Table 3 is only for explaining the present application, and is not limited to the case shown in Table 3.
  • the RMSI PDSCH configuration that the first indication information (8 bits in the PBCH) can indicate may also present other cases.
  • the time position of sending the SS/PBCH block may be a preset preset time position of the SS/PBCH block in the first time window. That is, the SS/PBCH block is transmitted at a fixed location.
  • the first time window is a time window of a specific length, such as a 1 ms time window.
  • the first time window may include a preset time position corresponding to each of the one or more SS/PBCH blocks.
  • the time index in the PBCH of the SS/PBCH block may indicate the index of the SS/PBCH block in the first time window, that is, the SS/PBCH block is the first in the first time window.
  • SS/PBCH block may indicate the index of the SS/PBCH block in the first time window, that is, the SS/PBCH block is the first in the first time window.
  • the symbol of the RMSI PDSCH that is not carried in the time interval may be It is filled by the first downlink signal.
  • the first downlink signal may include other downlink signals (such as reference signals such as CSI-RS) instead of the SS/PBCH block.
  • the 1 ms time window includes preset time positions corresponding to two SS/PBCH blocks (SS/PBCH block 1, SS/PBCH block 2): symbol 0. -3, symbol 28-31.
  • the time interval between two adjacent preset time positions is 24 symbols.
  • the RMSI PDSCH1 corresponding to the SS/PBCH block 1 is transmitted on the symbols 4-23, and the RMSI PDSCH2 corresponding to the SS/PBCH block 2 is transmitted on the symbols 32-51, each continuing for 20 symbols, which is insufficient to occupy the time interval.
  • the network device can fill the first downlink signal in blank symbols (i.e., symbols 24-27, symbols 52-55).
  • the blank symbol refers to a symbol that does not carry a downlink signal.
  • discontinuous scheduling due to no downlink signal transmission at the time interval can be avoided, and channel access rights can be avoided, and multiple system information (carrying in multiple SS/PBCH blocks and their respective corresponding RMSI PDSCHs) can be realized.
  • One-time complete delivery is possible.
  • the payload of the RMSI PDSCH is insufficient to fill the interval between two adjacent preset time positions in the first time window, that is, the duration of the RMSI PDSCH is less than the interval.
  • the first downlink signal may further include a partial RMSI PDSCH, that is, the time interval may be filled by using a partial RMSI PDSCH, and the receiving effect of the enhanced partial RMSI PDSCH may be achieved.
  • the time position of sending the SS/PBCH block may not be the preset preset time position of the SS/PBCH block in the first time window. That is, the SS/PBCH block is not sent at a fixed location.
  • This other implementation is particularly applicable to the case where the payload of the RMSI PDSCH is insufficient to fill the interval between two adjacent preset time positions in the first time window.
  • the time position of the RMSI PDSCH corresponding to the SS/PBCH block is sent under the condition that the payload of the RMSI PDSCH is insufficient to fill the interval between two adjacent preset time positions in the first time window.
  • the time position of the next SS/PBCH block that sends the SS/PBCH block is consecutively adjacent.
  • the preset time position corresponding to the two SS/PBCH blocks is: 0-3, symbol 28-31.
  • the time interval between these two adjacent preset time positions is 24 symbols.
  • the RMSI PDSCH1 corresponding to the SS/PBCH block 1 is transmitted on the symbols 4-23, and the RMSI PDSCH2 corresponding to the SS/PBCH block 2 is transmitted on the symbols 32-51, each continuing for 20 symbols, which is insufficient to occupy the time interval.
  • FIG. 16B in a scenario where the channel bandwidth is 20 MHz and the SCS is 60 kHz
  • the preset time position corresponding to the two SS/PBCH blocks is: 0-3, symbol 28-31.
  • the time interval between these two adjacent preset time positions is 24 symbols.
  • the RMSI PDSCH1 corresponding to the SS/PBCH block 1 is transmitted on the symbols 4-23
  • the RMSI PDSCH2 corresponding to the SS/PBCH block 2 is transmitted on the symbols 32-51, each continuing for 20 symbols,
  • the SS/PBCH block 1 in the 1 ms time window, can be transmitted at its corresponding preset time position (ie, symbol 0-3), and the time position of the SS/PBCH block 2 is transmitted (symbol 24-27).
  • the time position (symbol 4-23) of the RMSI PDSCH corresponding to the SS/PBCH block1 is transmitted.
  • the terminal When the time position of the SS/PBCH block is not fixed, after the terminal detects an SS/PBCH block, in addition to the time index carried by the PBCH, the terminal needs to determine the system according to the number of symbols sustained by the RMSI PDSCH.
  • the index of the system frame in which the timing information is located, the index of the subframe, and the index of the symbol acquire the cell time synchronization.
  • the blank symbol may be filled by the first downlink signal under the condition that there is a blank symbol near the boundary of the first time window.
  • the blank symbol refers to a symbol that does not carry a downlink signal.
  • a blank symbol may exist at the boundary of the last RMSI PDSCH and 1 ms time window in the 1 ms time window, for which the network device may send other downlink signals for padding.
  • discontinuous scheduling due to the absence of downlink signal transmission of the blank symbol can be avoided, and loss of channel access rights can be avoided, and multiple first time windows can be continuously transmitted.
  • Embodiment 1 can also be applied in the NR system.
  • the network equipment in the NR system does not need to obtain channel access rights through the LBT, there is no problem of losing channel access rights.
  • the RMSI PDSCH and the SS/PBCH block are consecutively adjacent in the time domain, and the RMSI CORESET may not be required to indicate the resource configuration of the RMSI PDSCH, and the first indication information carried in the SS/PBCH block indicates the RMSI PDSCH.
  • the resource configuration can be used, and the signaling overhead can also be saved in the NR system.
  • the first embodiment can prevent the network device from losing the channel, realize the complete transmission of the system information in one time, and improve the initial access efficiency of the terminal device. Moreover, since RMSI CORESET is not required to indicate the resource configuration of the RMSI PDSCH, signaling overhead can also be saved.
  • the duration of the RMSI PDSCH may be related to the size of the payload of the RMSI PDSCH, the modulation coding scheme (MCS) employed by the RMSIPDSCH, and the resource configuration of the DMRS in the RMSI PDSCH. Once these factors change, the duration of the RMSI PDSCH may also change.
  • MCS modulation coding scheme
  • the time position for sending the SS/PBCH block is fixed.
  • the 1ms time window includes preset preset time positions corresponding to the plurality of SS/PBCH blocks, including: symbols 0 to 3, symbols 14 to 17, symbols 28 to 31, and symbols 42 to 45.
  • the symbol ranges of the RMSI PDSCH corresponding to each of the SS/PBCH blocks 1 to 4 are: symbols 4 to 13, symbols 18 to 27, symbols 32 to 41, and symbols 46 to 55, respectively.
  • the RMSI PDSCH duration is less than 10 symbols, there is a blank symbol between the next SS/PBCH block and the RMSI PDSCH corresponding to the previous SS/PBCH block, and the network device needs to send other downlink signals to fill in the blank symbol.
  • Option 2 The time position for sending the SS/PBCH block is not fixed.
  • the SS/PBCH block and its corresponding RMSI PDSCH are continuously transmitted, and the next SS/PBCH block is transmitted next to the RMSI PDSCH corresponding to the previous SS/PBCH block, as shown in FIG. 16B.
  • the RMSI PDSCH continues for m (m is a positive integer, m ⁇ 10) symbols
  • the time positions of the SS/PBCH blocks 1 to 4 transmitted in the 1 ms window are: symbols 0 to 3, and symbols (4+m) to ( 7+m), symbol (8+2m) to (11+2m), symbol (12+3m) to (15+3m).
  • the symbol ranges of the RMSI PDSCH corresponding to each of the SS/PBCH blocks 1 to 4 are: symbol 4 to (3+m), symbol (8+m) to symbol (7+2m), and symbol (12+2m) to symbol. (11+3m), symbol (16+3m) ⁇ (15+4m).
  • the time position for sending the SS/PBCH block is fixed.
  • the 1ms time window includes preset time positions corresponding to the plurality of SS/PBCH blocks, including: symbols 0 to 3, symbols 7 to 10, symbols 14 to 17, symbols 21 to 24, symbols 28 to 31, and symbols 35 to 38. Symbols 42 to 45, and symbols 49 to 52.
  • the symbol ranges of the RMSI PDSCH corresponding to each of the SS/PBCH blocks 1 to 8 are: symbols 4 to 6, symbols 11 to 13, symbols 18 to 20, symbols 25 to 27, symbols 32 to 34, and symbols 39 to 41, and symbols. 46 to 48, symbols 53 to 55.
  • the network device needs to send other downlink signals to fill in the blank symbol.
  • Option 2 The time position for sending the SS/PBCH block is not fixed.
  • the SS/PBCH block and its corresponding RMSI PDSCH are continuously transmitted, and the next SS/PBCH block is transmitted next to the RMSI PDSCH corresponding to the previous SS/PBCH block, as shown in FIG. 16B.
  • the time positions of the SS/PBCH blocks 1 to 8 transmitted in the 1 ms window are: symbols 0 to 3, and symbols (4+n) to ( 7+n), symbol (8+2n) ⁇ (11+2n,) symbol (12+3n) ⁇ (15+3n), symbol (16+4n) ⁇ (19+4n), symbol (20+5n) ⁇ (23+5n), symbols (24+6n) to (27+6n), symbols (28+7n) to (31+7n).
  • the symbol ranges of the RMSI PDSCH corresponding to each of the SS/PBCH blocks 1 to 8 are: symbol 4 to (3+n), symbol (8+n) to (7+2n), and symbol (12+2n) to (11). +3n), symbol (16+3n) to (15+4n), symbol (20+4n) to (19+5n), symbol (24+5n) to (23+6n), symbol (28+6n) ⁇ (27+7n), symbol (32+7n) ⁇ (31+8n).
  • the network device needs to send other downlink signals to fill in the blank symbol.
  • the number of symbols that the RMSI PDSCH continues to be may be other values.
  • the resource mapping manners of the SS/PBCH block and the RMSI PDSCH can be similarly determined and no longer unfolded one by one.
  • scheme 2 is adopted, that is, a time position for transmitting an SS/PBCH block (bearing MIB), a time position for transmitting an RMSI CORESET corresponding to the SS/PBCH block, and an RMSI PDSCH corresponding to the SS/PBCH block (bearing RMSI)
  • the time positions are consecutively adjacent.
  • the SS/PBCH block may be any SS/PBCH block to be transmitted.
  • the resource configuration of the RMSI CORESET is indicated by the PBCH in the SS/PBCH block, and the resource configuration of the RMSI PDSCH is indicated by the RMSI CORESET.
  • Figure 18 exemplarily shows one possible resource mapping pattern.
  • the initial partial bandwidth (BWP) is 20 MHz and the subcarrier spacing is 60 kHz
  • the RMSI PDSCH may last 20 OFDM symbols.
  • the RMSI CORESET lasts 4 OFDM symbols and the SS/PBCH block lasts 4 symbols, the SS/PBCH block and its corresponding RMSI CORESET, RMSI PDSCH can be accommodated in the 1ms time window.
  • the two SS/PBCH blocks are respectively transmitted at the following fixed positions: symbol 0-3 and symbol 28-31, and their respective corresponding RMSI CORESET are respectively transmitted at the following time positions: symbols 4-7 and symbols 32-35
  • Their respective corresponding RMSI PDSCHs are transmitted at the following time positions: symbols 8-27 and symbols 36-55.
  • SS/PBCH block1 and its corresponding RMSI CORESET1, RMSI PDSCH1 are consecutively adjacent, and SS/PBCH block2 and its corresponding RMSI CORESET2, RMSI PDSCH2 are consecutively adjacent.
  • the network device can be prevented from losing the channel, and the complete system information carried by the SS/PBCH block1 and its corresponding RMSI PDSCH1 can be completely transmitted in one time, and the SS/PBCH block2 and its corresponding RMSI PDSCH2 are carried together.
  • the system information is completely transmitted in one time, improving the initial access efficiency of the terminal device.
  • the RMSI CORESET occupies the entire initial bandwidth of 20 MHz (including 24 RBs).
  • the RMSI PDSCH occupies the entire 20 MHz initial partial bandwidth (containing 24 RBs).
  • the initial partial bandwidth (BWP) refers to the bandwidth that the network device allows access after the LBT succeeds.
  • the RMSI CORESET and the RMSI PDSCH can occupy the entire initial bandwidth in the frequency domain, and the channel bandwidth occupancy rate is 100%. In this way, the transmission of the RMSI CORESET and the RMSI PDSCH can meet the OCB requirement, and the resource occupancy of the RMSI CORESET and the RMSI PDSCH in the frequency domain can be avoided, and the signaling overhead is saved.
  • the configuration information of the RMSI CORESET is carried in the PBCH for a total of 8 bits.
  • the time position when the RMSI CORESET in the NR-U is transmitted is next to the time position at which the SS/PBCH block is transmitted.
  • the possible RMSI CORESET configuration in the NR-U can be as shown in Table 4. It only needs to be indicated by 2 bits, and the remaining 6 bits can be used. Other instructions.
  • the 2 bits may indicate that the RMSI CORESET duration symbol number is 3, or may indicate that the number of persistent symbols is 1/2.
  • the remaining 6 bits of information can be used as other indications.
  • the number of symbols that the RMSI CORESET continues may be 2 or 4 OFDM symbols.
  • the RMSI CORESET needs to indicate cross-slot scheduling information of the RMSIPDSCH.
  • the network device needs to configure the slot aggregation parameter aggregationFactorDL through the radio resource control (RRC) signaling before the RMSIPDSCH is scheduled across the time slots, and then indicate the cross-slot through the DCI. Scheduling.
  • RRC radio resource control
  • the terminal that has not completed the initial access cannot obtain the correlation parameter aggregationFactorDL through RRC signaling.
  • an index (such as an 8-bit Index) can be configured in the RMSI CORESET to indicate the number of symbols that the RMSIPDSCH continues to perform, as shown in Table 5.
  • Table 5 exemplarily shows the manner in which the number of symbols RMSIPDSCH continues to be indicated by an index (e.g., 0-3) in the RMSI CORESET when scheduling the RMSIPDSCH across time slots.
  • the RMSI CORESET and the RMSI PDSCH may not occupy the entire initial bandwidth in the frequency domain, so that the network device can also be occupied by the RMSI CORESET/RMSI PDSCH.
  • Other downlink signals are sent on the RB.
  • the time position of sending the SS/PBCH block may be a preset preset time position of the SS/PBCH block in the first time window. That is, the SS/PBCH block is transmitted at a fixed location.
  • the first time window is a time window of a specific length, such as a 1 ms time window.
  • the first time window may include a preset time position corresponding to each of the one or more SS/PBCH blocks.
  • the time index in the PBCH of the SS/PBCH block may indicate the index of the SS/PBCH block in the first time window, that is, the SS/PBCH block is the first in the first time window.
  • SS/PBCH block SS/PBCH block.
  • the RMSI CORESET is not carried in the time interval or The sign of the RMSI PDSCH can be filled by the first downlink signal.
  • the 1ms time window includes preset time positions corresponding to two SS/PBCH blocks (SS/PBCH block1, SS/PBCH block2): symbols 0-3 and 28-31.
  • the time interval between two adjacent preset time positions is 24 symbols.
  • the RMSI CORESET1 and RMSI PDSCH1 corresponding to SS/PBCH block1 last for 20 symbols
  • the RMSI CORESET2 and RMSI PDSCH2 corresponding to SS/PBCH block2 last for 20 symbols, which is not enough to occupy the time interval.
  • the network device can fill the first downlink signal in blank symbols (i.e., symbols 24-27, symbols 52-55).
  • the blank symbol is a symbol that does not carry a downlink signal.
  • discontinuous scheduling due to no downlink signal transmission at the time interval can be avoided, and channel access rights can be avoided, and multiple system information (carrying in multiple SS/PBCH blocks and their respective corresponding RMSI PDSCHs) can be realized.
  • the duration of the RMSI CORESET and the RMSI PDSCH is less than the interval between two adjacent preset time positions in the first time window, indicating that the payload size of the RMSI CORESET and the RMSI PDSCH is insufficient to fill the time interval.
  • the first downlink signal may further include a partial RMSI PDSCH, that is, the time interval may be filled by using a partial RMSI PDSCH, and the receiving effect of the enhanced partial RMSI PDSCH may be achieved.
  • the time position of sending the SS/PBCH block may not be the preset preset time position of the SS/PBCH block in the first time window. That is, the SS/PBCH block is not sent at a fixed location.
  • This other implementation is particularly applicable to the case where the payload of the RMSI CORESET and RMSI PDSCH is insufficient to fill the interval between two adjacent preset time positions in the first time window.
  • the time position of the next SS/PBCH block is sent under the condition that the duration of the RMSI CORESET and the RMSI PDSCH is less than the interval between two adjacent preset time positions in the first time window.
  • the time position of the RMSI PDSCH corresponding to the current SS/PBCH block is consecutively adjacent.
  • the 1ms time window includes preset time positions corresponding to two SS/PBCH blocks (SS/PBCH block1, SS/PBCH block2): symbols 0-3 and 28-31.
  • the time interval between two adjacent preset time positions is 24 symbols.
  • the RMSI CORESET1 and RMSI PDSCH1 corresponding to SS/PBCH block1 last for 20 symbols
  • the RMSI CORESET2 and RMSI PDSCH2 corresponding to SS/PBCH block2 last for 20 symbols, which is not enough to occupy the time interval.
  • the SS/PBCH block 1 in the 1 ms time window, can be transmitted at its corresponding preset time position (ie, symbol 0-3), and the time position of the SS/PBCH block 2 is transmitted (symbol 24-27).
  • the time position (symbol 4-23) of the RMSI PDSCH corresponding to the SS/PBCH block1 is transmitted. In this way, discontinuous scheduling due to no downlink signal transmission at the time interval can be avoided, and channel access rights can be avoided, and multiple system information (carrying in multiple SS/PBCH blocks and their respective corresponding RMSI PDSCHs) can be realized.
  • One-time complete delivery in the 1 ms time window.
  • the blank symbol may be filled by the first downlink signal under the condition that there is a blank symbol near the boundary of the first time window.
  • the blank symbol refers to a symbol that does not carry a downlink signal. In this way, discontinuous scheduling due to the absence of downlink signal transmission of the blank symbol can be avoided, and loss of channel access rights can be avoided, and multiple first time windows can be continuously transmitted.
  • the second embodiment can prevent the network device from losing the channel, complete the one-time complete transmission of the system information, and improve the initial access efficiency of the terminal device.
  • the duration of the RMSI PDSCH may be related to the size of the payload of the RMSI PDSCH, the modulation coding scheme (MCS) employed by the RMSIPDSCH, and the resource configuration of the DMRS in the RMSI PDSCH. Once these factors change, the duration of the RMSI PDSCH may also change.
  • MCS modulation coding scheme
  • Case 1 When the RMSI CORESET plus the RMSI PDSCH continuous symbol number ⁇ 10, one SS/PBCH block and its corresponding RMSI CORESET and RMSI PDSCH last for 14 symbols, then up to 4 can be placed in the 1ms time window.
  • the possible mapping of the SS/PBCH block and its corresponding RMSI CORESET and RMSI PDSCH is as follows:
  • the time position for sending the SS/PBCH block is fixed.
  • the 1ms time window includes preset preset time positions corresponding to the plurality of SS/PBCH blocks, including: symbols 0 to 3, symbols 14 to 17, symbols 28 to 31, and symbols 42 to 45.
  • the symbol ranges of the RMSI CORESET and RMSI PDSCH corresponding to the respective SS/PBCH blocks 1 to 4 are: symbols 4 to 13, symbols 18 to 27, symbols 32 to 41, and symbols 46 to 55, respectively.
  • Option 2 The time position for sending the SS/PBCH block is not fixed.
  • the SS/PBCH block and its corresponding RMSI CORESET, RMSI PDSCH are continuously transmitted, and the next SS/PBCH block is transmitted next to the RMSI CORESET and RMSI PDSCH corresponding to the previous SS/PBCH block, as shown in FIG. 19B.
  • the time positions of transmitting SS/PBCH blocks 1 to 4 in a 1 ms window are: symbols 0 to 3, symbols (4+) m) to (7+m), symbols (8+2m) to (11+2m), symbols (12+3m) to (15+3m).
  • the symbol ranges of RMSI CORESET and RMSI PDSCH corresponding to SS/PBCH blocks 1 to 4 are: symbol 4 to (3+m), symbol (8+m) to symbol (7+2m), and symbol (12+2m). ) ⁇ symbol (11 + 3m), symbol (16 + 3m) ⁇ (15 + 4m).
  • the time position for sending the SS/PBCH block is fixed.
  • the 1ms time window includes preset time positions corresponding to the plurality of SS/PBCH blocks, including: symbols 0 to 3, symbols 7 to 10, symbols 14 to 17, symbols 21 to 24, symbols 28 to 31, and symbols 35 to 38. Symbols 42 to 45, and symbols 49 to 52.
  • the RMSI CORESET and RMSI PDSCH corresponding symbol ranges corresponding to SS/PBCH blocks 1 to 8 are: symbols 4 to 6, symbols 11 to 13, symbols 18 to 20, symbols 25 to 27, symbols 32 to 34, and symbols 39 to 41, symbols 46 to 48, and symbols 53 to 55.
  • Option 2 The time position for sending the SS/PBCH block is not fixed.
  • the SS/PBCH block and its corresponding RMSI CORESET, RMSI PDSCH are continuously transmitted, and the next SS/PBCH block is transmitted next to the RMSI CORESET and RMSI PDSCH corresponding to the previous SS/PBCH block, as shown in FIG. 19B.
  • the time positions of the SS/PBCH blocks 1 to 8 transmitted in the 1 ms window are: symbols 0 to 3, and symbols (4+n) to ( 7+n), symbol (8+2n) ⁇ (11+2n,) symbol (12+3n) ⁇ (15+3n), symbol (16+4n) ⁇ (19+4n), symbol (20+5n) ⁇ (23+5n), symbols (24+6n) to (27+6n), symbols (28+7n) to (31+7n).
  • the RMSI CORESET and RMSI PDSCH corresponding symbol ranges for SS/PBCH blocks 1 to 8 are: symbol 4 to (3+n), symbol (8+n) to (7+2n), and symbol (12+2n). ⁇ (11+3n), symbol (16+3n) ⁇ (15+4n), symbol (20+4n) ⁇ (19+5n), symbol (24+5n) ⁇ (23+6n), symbol (28+ 6n) ⁇ (27 + 7n), symbols (32 + 7n) ⁇ (31 + 8n).
  • the number of symbols that the RMSI PDSCH continues to be may be other values.
  • the resource mapping manners of the SS/PBCH block, the RMSI CORESET, and the RMSI PDSCH can be similarly determined and not expanded one by one.
  • the RMSI PDSCH persistent symbol number and resource mapping mode follow.
  • the number of symbols sustained by the RMSI PDSCH is also related to the payload size of the RMSI PDSCH, the MCS and the adopted DMRS configuration, except that the number of available RBs included in a single symbol is different.
  • the number of bits that a single symbol can carry is different.
  • the table in Figure 17 shows the number of available RBs on a single symbol for several different bandwidths and different SCSs.
  • the third embodiment shows the resource mapping manner of the SS/PBCH block and the RMSI PDSCH in the ECP scenario.
  • an Extended Cyclic Prefix (ECP) is required.
  • ECP Extended Cyclic Prefix
  • the RMSI PDSCH payload size is 1000 bits and the RMSI PDSCH uses a 1-symbol Type 1 DMRS, the RMSI PDSCH continues for 20 OFDM symbols.
  • the two SS/PBCH blocks and their respective corresponding RMSI PDSCHs occupy exactly all the OFDM symbols in the 1 ms time window. This can avoid blank symbols in the 1ms time window, which can prevent the network device from sending other downlink signals to fill the blank symbols.
  • the number of symbols included in the 1ms time window is different.
  • the number of symbols of the RMSI PDSCH can be selected to avoid blank symbols in the 1ms time window.
  • the network device needs to preset in the next SS/PBCH block.
  • the time position can send an unsent SS/PBCH block. Since the RMSIPDSCH has a long duration, when the network device succeeds in the middle of the two preset time positions, the other downlink signals need to be sent to occupy the channel first, which increases the complexity of the system scheduling and the access delay of the UE.
  • another aspect of the present application further provides a signal transmission method, the main inventive idea thereof may include: after passing the LBT, one or more time positions of the SS/PBCH block are consecutively adjacent, the SS/PBCH block
  • the corresponding RMSI PDSCH (or RMSI CORESET and RMSI PDSCH corresponding to the SS/PBCH block) continuously occupies multiple symbols. The details will be described below by way of specific embodiments.
  • the network device can flexibly send one or more SS/PBCH blocks and their corresponding RMSICORESET and RMSI PDSCH (or only RMSI PDSCH) after the LBT succeeds, where RMSICORESET and RMSIPDSCH (or only RMSI PDSCH) can be The corresponding SS/PBCH block is transmitted continuously or discontinuously.
  • the network device may be based on the result of the LBT. Different symbol locations begin to transmit the SS/PBCH block and the corresponding RMSICORESET and RMSI PDSCH (or only RMSI PDSCH).
  • the network device can configure the preset preset time positions corresponding to the eight SS/PBCH blocks in the 1ms time window. The position 1 is the symbol 0-3, the position 2 is the symbol 4-7, and the position 3 is the symbol 8-11.
  • Position 4 is the symbol 12-15
  • position 5 is the symbol 16-19
  • position 6 is the symbol 20-23
  • position 7 is the symbol 24-27
  • position 8 is the symbol 28-31.
  • the network device sends the SS/PBCH block at one of the above optional preset time positions.
  • the time index carried by the SS/PBCH block sent at different symbol positions is also different, so that the terminal can perform time synchronization through the time index of the SS/PBCH block.
  • the network device since the network device does not have time to update the time index carried in the SS/PBCH block after the LBT is successful, the network device can prepare m SS/PBCH blocks with different time indexes before the LBT. For example, the above positions 1 to 8 can respectively correspond to the time.
  • the network device may select an SS/PBCH block with a corresponding time index according to the symbol position of the sending SS/PBCH block, for example, sending an SS/PBCH block with a time index of 0 at symbol 0-3; or at symbol 28 -31 Sends an SS/PBCH block with a time index of 8.
  • its corresponding RMSICORESET and RMSI PDSCH (or RMSI PDSCH only) are transmitted next to the SS/PBCH block.
  • the PBCH is indicated in the foregoing Embodiment 2 (ie, referring to the existing provisions of the NR for the PBCH); when the network device
  • the indication manner of the PBCH can be referred to the foregoing Embodiment 1 in the manner of indicating the RMSI PDSCH corresponding to the SS/PBCH block and not transmitting the RMSI CORESET.
  • the SS/PBCH block, the RMSI CORESET and the RMSI PDSCH are discontinuously transmitted, that is, the time domain resource occupied by the SS/PBCH block and its corresponding RMSI CORESET,
  • the time domain resources occupied by the RMSI PDSCH are not continuous.
  • the network device may send the SS/PBCH block at a preset time position of sending an SS/PBCH block after the LBT succeeds.
  • the RMSI CORESET time-frequency resource location corresponding to the SS/PBCH block may be indicated by 8-bit information in the PBCH in the SS/PBCH block, the indication information indicating the time domain and frequency domain resources occupied by the RMSI CORESET.
  • the RMSI CORESET defaults to occupying the entire initial bandwidth portion (initial BWP) in the frequency domain.
  • the PBCH in the SS/PBCH block can also indicate the starting time position (such as the start symbol) of more possible RMSI CORESET, and the starting time position of the RMSI CORESET can refer to the first sending SS/PBCH block. Preset the time position for indication or calculation.
  • the terminal does not detect the RMSI CORESET at the start time position indicated by the PBCH, the RMSI CORESET is continuously detected at a specified time window after the start time position indicated by the PBCH.
  • the length of the time window for detecting the RMSI CORESET may be preset (eg, as specified by a standard protocol), or the length of the time window used to detect the RMSI CORESET may also be indicated by the PBCH.
  • the RMSI CORESET can occupy the entire initial BWP in the frequency domain
  • the DMRS corresponding to the RMSI CORESET can also occupy the entire initial BWP in the frequency domain
  • the wideband DMRS can be used for the auxiliary terminal to blindly check the RMSI CORESET.
  • the time position for transmitting the SS/PBCH block is located in a different time slot (1 ms) from the time positions of its corresponding RMSI CORESET and RMSI PDSCH.
  • the time position for transmitting the SS/PBCH block and the time position of the corresponding RMSI CORESET and RMSI PDSCH may also be located in the same time slot (1 ms).
  • the PBCH is indicated in the foregoing Embodiment 2 (ie, referring to the existing provisions of the NR for the PBCH).
  • the resource location of the RMSI PDSCH requires RMSI CORESET to indicate, with specific reference to the existing provisions of NR for RMSI CORESET.
  • the network device when the network device has two SS/PBCH blocks and its corresponding RMSICORESET and RMSI PDSCH (or only RMSI PDSCH) for joint transmission, the transmission is completed.
  • An SS/PBCH block is followed by its corresponding RMSICORESET and RMSI PDSCH (or only RMSI PDSCH), followed by another SS/PBCH block and its corresponding RMSICORESET and RMSI PDSCH (or RMSI PDSCH only).
  • the network device can transmit the two SS/PBCH blocks and their corresponding RMSICORESET and RMSI PDSCH (or only the RMSI PDSCH) on different symbols according to the time through the LBT.
  • the RMSI PDSCH persistent symbol length may be an integer multiple of 4 symbols, such as 4, 8, or 12 symbols.
  • the PBCH indication manner is the foregoing Embodiment 2 (ie, refer to the existing provisions of the NR for the PBCH); when the network device is tight
  • the indication of the PBCH refer to the foregoing first embodiment, when the SS/PBCH block only sends the RMSI PDSCH corresponding to the SS/PBCH block and does not send the RMSI CORESET.
  • the network device first sends two SS/PBCH blocks, and sends the two SS/PBCHs in sequence after sending the second SS/PBCH block.
  • Each block corresponds to RMSICORESET and RMSI PDSCH (or only RMSI PDSCH).
  • the PBCH in the SS/PBCH block also needs to indicate the SS/PBCH block that needs to be continuously transmitted.
  • the number, and configuration information such as the number of consecutive symbols of its corresponding RMSICORESET and RMSI PDSCH (or RMSI PDSCH only), for convenience of explanation, will hereinafter be referred to as "second configuration information".
  • the PBCH in the SS/PBCH block also indicates configuration information such as the MCS of the RMSI PDSCH.
  • the PBCH in the SS/PBCH block may multiplex the 8 bits of the RMSI CORESET to indicate the second configuration information, and may also use the other reserved bits in the PBCH to indicate the second configuration information.
  • the SS/PBCH block occupies 4 symbols, and the network device sends 2 SS/PBCH blocks. If the network device succeeds in LBT before the symbol 0, the 2 SS/PBCH blocks occupy the symbols 0-3 and the symbols respectively. 4-7.
  • the terminal After receiving the first SS/PBCH block, the terminal knows that the SS/PBCH block occupies the symbol 0-3, and the symbol 4-7 is occupied by the second SS/PBCH block, so the first SS/ The start symbol of the RMSICORESET and RMSI PDSCH (or RMSI PDSCH) corresponding to the PBCH block is symbol 8, the end symbol is the symbol x, and x is equal to 8+RMSICORESET and RMSI PDSCH (or only RMSI PDSCH).
  • the number of symbols is -1;
  • the terminal receives the second SS/PBCH block, it can know that the start symbol of the RMSICORESET and RMSI PDSCH (or only the RMSI PDSCH) corresponding to the second SS/PBCH block is y, and y is equal to 8+RMSICORESET.
  • the number of symbols that the RMSI PDSCH (or only the RMSI PDSCH) continues, the end symbol is z, z is equal to 8+RMSI PDSCH (or only RMSI PDSCH) the number of symbols *2-1.
  • the method exemplarily shown by 24 can be extended to scenarios in which multiple SS/PBCH blocks and their corresponding RMSICORESET and RMSI PDSCH (or RMSI PDSCH only) are continuously transmitted.
  • the network device has 2 SS/PBCH blocks and RMSI CORESET and RMSI PDSCH for which transmission is required, and the SS/PBCH block and its corresponding RMSI CORESET and RMSI PDSCH are not transmitted continuously.
  • the network device sends the SS/PBCH block at a preset time position of two consecutive SS/PBCH blocks after the successful LBT.
  • the RMSI CORESET time-frequency resource location may be indicated by 8-bit information of the PBCH in the SS/PBCH block, which indicates the time domain and frequency domain resources occupied by the RMSI CORESET, respectively.
  • the RMSI CORESET defaults to occupying the entire initial BWP in the frequency band.
  • the PBCH in the SS/PBCH block can also indicate the starting time position of more possible RMSI CORESET.
  • the starting time position of the RMSI CORESET can refer to the first preconfigured first available for transmitting the SS/PBCH block.
  • the start symbol or end symbol of the location or may be indicated or calculated by referring to the 0th symbol of the time slot in which the SS/PBCH block is transmitted.
  • the terminal does not detect the RMSI CORESET at the start time position indicated by the PBCH in the SS/PBCH block, the RMSI CORESET is continuously detected in a specified time window after the start time position indicated by the PBCH.
  • the length of the time window for detecting the RMSI CORESET may be preset (eg, as specified by a standard protocol), or the length of the time window used to detect the RMSI CORESET may also be indicated by the PBCH.
  • the RMSI CORESET should occupy the entire initial BWP, and the DMRS corresponding to the RMSI CORESET also fills the entire initial BWP, which can be used for blind detection of the RMSI CORESET by the terminal.
  • the time position for transmitting the SS/PBCH block is located in a different time unit (eg, time slot) from the time positions of its corresponding RMSI CORESET and RMSI PDSCH.
  • the time position for transmitting the SS/PBCH block and the time position of the corresponding RMSI CORESET and RMSI PDSCH may also be located in the same time unit (eg, time slot).
  • the network device transmits the SS/PBCH block and its corresponding RMSI CORESET and RMSI PDSCH in the manner exemplarily shown in FIG. 25, the PBCH is indicated in the foregoing Embodiment 2 (ie, referring to the existing provision of the PBCH in the NR). Moreover, the resource location of the RMSI PDSCH requires RMSI CORESET to indicate, with specific reference to the existing provisions of NR for RMSI CORESET.
  • the network device can flexibly send one or more SS/PBCH blocks and their corresponding RMSICORESET and RMSI PDSCH (or only RMSI PDSCH) after the LBT succeeds, where RMSICORESET and RMSI PDSCH (or only RMSI PDSCH) can It is transmitted continuously with the corresponding SS/PBCH block, or it can be sent discontinuously, providing a more flexible transmission method.
  • the network device sends m SS/PBCH blocks and n corresponding RMSI PDSCHs, where m>n, m, and n are positive integers.
  • the network device sends m corresponding RMSI PDSCHs by sending m SS/PBCH blocks.
  • Embodiment 5 can improve the flexibility of transmitting SS/PBCH block, RMSICORESET, and RMSI PDSCH (or only RMSI PDSCH).
  • the network device configures 8 preset time positions for transmitting SS/PBCH blocks in a 1 m time window.
  • the preset time positions of the eight transmit SS/PBCH blocks correspond to one RMSICORESET and RMSI PDSCH (or only RMSI PDSCH).
  • 8 SS/PBCH blocks are continuously transmitted at the preset time position, and the corresponding RMSICORESET and RMSI PDSCH are transmitted immediately after the last preset time position (or only RMSI PDSCH).
  • the network device When the network device succeeds in LBT before symbol 12, the network device continuously transmits 5 SS/PBCH blocks, and sends the corresponding RMSICORESET and RMSI PDSCH (or only RMSI PDSCH) immediately after the last SS/PBCH block.
  • the network device transmits at least one identical SS/PBCH block and one corresponding RMSICORESET and RMSI PDSCH (or only RMSI PDSCH) according to the symbol position through the LBT.
  • the network device continuously sends several SS/PBCH blocks and one RMSICORESET and RMSI PDSCH (or only RMSI PDSCH) RMSICORESET and RMSI PDSCH (or only RMSI PDSCH) next to the last SS/PBCH block after the LBT succeeds.
  • the channel will not be occupied by other devices.
  • the network device when the network device transmits only the RMSI PDSCH next to the last SS/PBCH block without transmitting the RMSI CORESET, there are two PBCH indication modes: 1)
  • the PBCH in the SS/PBCH block indicates continuous transmission of the SS/
  • the number of PBCH blocks and the related configuration information of the RMSI such as the number of persistent symbols of the RMSI PDSCH, MCS, DMRS configuration
  • the network device can multiplex the 8-bit indication of the PBCH in the SS/PBCH block for indicating the RMSI CORESET, and can also be used. Other reserved bits of the PBCH in the SS/PBCH block are indicated.
  • the terminal may find a corresponding RMSI PDSCH according to the SS/PBCH block information, and perform PDSCH decoding according to the indicated configuration information.
  • the PBCH in the SS/PBCH block gives the time domain position indication of the RMSI (this indication may be the reference point of the first preconfigured position available for transmitting the SS/PBCH block or the end symbol as a reference point, or may
  • the configuration information of the RMSI PDSCH such as the persistent symbol number of the RMSI PDSCH, the MCS, the DMRS configuration, etc., is configured by configuring the 0th symbol of the slot in which the SS/PBCH block is transmitted as a reference point.
  • the above indication information may multiplex 8 bits in the PBCH for indicating the RMSI CORESET, and may also use other reserved bits in the PBCH.
  • the terminal finds the RMSI PDSCH corresponding to the received SS/PBCH block according to the above information, and performs RMSI PDSCH decoding according to the above configuration information.
  • the network device transmits the RMSI CORESET and the RMSI PDSCH next to the last SS/PBCH block and both are continuously transmitted, that is, the RMSI PDSCH is immediately followed by the RMSI CORESET transmission in the time domain.
  • the PBCH in the SS/PBCH block There are two ways to indicate the PBCH in the SS/PBCH block: 1) the number of consecutive SS/PBCH blocks and the configuration information of the RMSI CORESET, such as the number of persistent symbols or the aggregation level, carried by the network device in the PBCH.
  • the configuration information may be multiplexed by indicating 8 bits of the RMSI CORESET in the PBCH, or may be indicated by using other reserved bits in the PBCH.
  • the terminal finds the corresponding RMSI CORESET according to the above information and performs decoding according to the above configuration information to further obtain configuration information of the RMSI PDSCH, such as persistent symbol number, MCS, DMRS configuration, etc., so that information in the RMSI PDSCH can be decoded and obtained.
  • configuration information of the RMSI PDSCH such as persistent symbol number, MCS, DMRS configuration, etc.
  • the PBCH in the SS/PBCH block gives the time domain position indication of the RMSI CORESET (this indication can be referenced to the start symbol or the end symbol of the first preconfigured position available for transmitting the SS/PBCH block, or
  • the configuration information of the RMSI CORESET such as the number of persistent symbols, is configured by configuring the 0th symbol of the slot in which the SS/PBCH block is transmitted as a reference point.
  • the above indication information may multiplex 8 bits in the PBCH for indicating the RMSI CORESET, and may also use other reserved bits in the PBCH.
  • the terminal finds the corresponding RMSI CORESET according to the information and decodes according to the above configuration information line and further obtains the configuration information of the RMSI PDSCH, such as the persistent symbol number, the MCS, the DMRS configuration, etc., so that the system information in the RMSI PDSCH can be decoded and obtained.
  • the SS/PBCH block and its corresponding RMSI CORESET and RMSI PDSCH are separately transmitted, that is, the time domain resource occupied by the SS/PBCH block and its corresponding RMSI CORESET.
  • the time domain resources occupied by the RMSI PDSCH are not continuous.
  • the network device sends the SS/PBCH block at a preset time position of multiple consecutive SS/PBCH blocks after the LBT succeeds.
  • the RMSI CORESET time-frequency resource location may be indicated by 8-bit information in the SS/PBCH block PBCH, which indicates the time domain frequency domain resources occupied by the RMSI CORESET, respectively.
  • RMSI CORESET defaults to occupying the entire initial BWP in the band.
  • the PBCH in the SS/PBCH block can indicate the starting time position of more possible RMSI CORESET.
  • the time position of the RMSI CORESET may refer to a pre-configured first start symbol or an end symbol that can be used to transmit the location of the SS/PBCH block, or configure the 0th symbol of the time slot in which the SS/PBCH block is sent. To indicate or calculate). If the terminal does not detect RMSI CORESET at the start time position indicated by the PBCH, the RMSI CORESET is continuously detected at a specified time window after the start time position indicated by the PBCH.
  • the length of the time window for detecting the RMSI CORESET may be preset (eg, as specified by a standard protocol), or the length of the time window used to detect the RMSI CORESET may also be indicated by the PBCH.
  • the RMSI CORESET should occupy the entire initial BWP, and the DMRS corresponding to the RMSI CORESET also fills the entire initial BWP, which can be used for blind detection of the RMSI CORESET by the terminal. In the example of FIG.
  • the time position for transmitting the SS/PBCH block is located in a different time unit (eg, time slot) from the time position of its corresponding RMSI CORESET and RMSI PDSCH (or only RMSI PDSCH).
  • the time position of the time position for transmitting the SS/PBCH block and its corresponding RMSI CORESET and RMSI PDSCH (or only the RMSI PDSCH) may also be located in the same time slot.
  • the network device continuously sends four SS/PBCH blocks at the preset time positions of the four sending SS/PBCH blocks, and is followed by Send 2 corresponding RMSICORESET and RMSI PDSCH (or RMSI PDSCH only).
  • the SS/PBCH block does not have a one-to-one correspondence with the RMSICORESET and the RMSI PDSCH (or only the RMSI PDSCH), so it is necessary to indicate the RMSICORESET and RMSI PDSCH (or only the RMSI PDSCH) corresponding to the SS/PBCH block in the PBCH.
  • PBCH indicates the total number of SS/PBCH blocks, the total number of RMSICORESET or RMSI PDSCH, and the correspondence between SS/PBCH block corresponding to RMSICORESET and RMSI PDSCH (or only RMSI PDSCH).
  • the first 4 SS/PBCH blocks may correspond to the first RMSICORESET and RMSI PDSCH (or only RMSI PDSCH), and the last 4 The SS/PBCH block corresponds to the second RMSICORESET and RMSI PDSCH (or only the RMSI PDSCH); the odd SS/PBCH block may correspond to the first RMSICORESET and RMSI PDSCH (or only the RMSI PDSCH), and the even SS/PBCH block corresponds to the first 2 RMSICORESET and RMSI PDSCH (or RMSI PDSCH only).
  • the system only supports several possible mapping modes. All possible correspondences can be given by the configuration table.
  • the exemplary configuration table can be given by the standard.
  • the PBCH indicates that the current usage configuration corresponds to the index in the foregoing configuration table, and the terminal can find the corresponding RMSICORESET and RMSI PDSCH (or only the RMSI PDSCH) according to the indication information and the time index of the received SS/PBCH block.
  • the PBCH carries the network device to continuously transmit the SS/PBCH block.
  • Number, RMSI CORESET and RMSI PDSCH The number of symbols and the configuration information of the RMSI CORESET, such as the number of persistent symbols and the mapping relationship between the RMSI CORESET and the RMSI PDSCH of the SS/PBCH block.
  • the indication information may be indicated by multiplexing 8 bits of the RMSI CORESET in the PBCH, or may be indicated by using other reserved bits in the PBCH.
  • the terminal finds the corresponding RMSI CORESET according to the indication information and performs decoding according to the foregoing configuration information to obtain configuration information of the RMSI PDSCH, such as a persistent symbol number, an MCS, a DMRS configuration, etc., so that decoding of the RMSI PDSCH can be performed to obtain system information carried by the RMSI PDSCH.
  • configuration information of the RMSI PDSCH such as a persistent symbol number, an MCS, a DMRS configuration, etc.
  • PBCH gives the time domain position indication of the first RMSI CORESET (this indication can be referenced to the start symbol or end symbol of the first preconfigured position available for transmitting the SS/PBCH block, or can be configured
  • the 0th symbol of the slot in which the SS/PBCH block is transmitted is the reference point
  • the number of symbols of the RMSI CORESET and RMSI PDSCH and the configuration information of the RMSI CORESET, such as the number of persistent symbols.
  • the above indication information may multiplex 8 bits in the PBCH for indicating the RMSI CORESET, and may also use other reserved bits in the PBCH.
  • the terminal finds the corresponding RMSI CORESET according to the information and decodes according to the above configuration information and obtains configuration information of the RMSI PDSCH, such as the number of persistent symbols, MCS, DMRS configuration, etc., so that the system information in the RMSI PDSCH can be decoded and obtained.
  • PBCH indication modes 1) The number of consecutive SS/PBCH blocks transmitted by the system in the PBCH and the mapping relationship between the SS/PBCH block and the RMSIPDSCH and the RMSI PDSCH Configuration information, such as the number of persistent symbols, MCS, DMRS configuration, etc.
  • the indication information may multiplex 8 bits in the PBCH for indicating the RMSI CORESET, and may also use other reserved bits in the PBCH.
  • the terminal finds the corresponding RMSIPDSCH according to the information and performs decoding according to the above configuration information.
  • the PBCH gives an RMSI time domain location indication corresponding to the SS/PBCH block (the indication may be a reference point or a termination symbol of a pre-configured first position available for transmitting the SS/PBCH block, or may be
  • the configuration information of the RMSI PDSCH such as the number of persistent symbols, the MCS, the DMRS configuration, etc., may also include the mapping relationship between the SS/PBCH block and the RMSIPDSCH. And the number of SS/PBCH blocks sent by the system.
  • the above indication information may multiplex 8 bits in the PBCH for indicating the RMSI CORESET, and may also use other reserved bits in the PBCH.
  • the terminal finds the corresponding RMSIPDSCH according to the information and performs decoding according to the above configuration information and acquires system information carried by the RMSIPDSCH.
  • the method exemplarily shown in Fig. 28 can be extended to a scenario of transmitting an SS/PBCH block and other numbers of multiple RMSICORESET and RMSI PDSCH (or only RMSI PDSCH).
  • the SS/PBCH block and its corresponding RMSI CORESET and RMSI PDSCH are separately transmitted, that is, the time domain resources occupied by the two are discontinuous.
  • the network device sends the SS/PBCH block at a preset time position of the SS/PBCH block after the successful LBT.
  • the RMSI CORESET time-frequency resource location corresponding to the SS/PBCH block may be indicated by 8-bit information indicating that the RMSI CORESET is indicated by the PBCH, and the indication information separately indicates the time domain frequency domain resources occupied by the RMSI CORESET.
  • RMSI CORESET defaults to occupying the entire initial BWP in the band.
  • the PBCH can indicate more possible RMSI CORESET time domain start time positions (the CORESET time domain location can be a pre-configured first start or end symbol that can be used to transmit the SS/PBCH block location. As a reference point, the 0th symbol of the time slot in which the SS/PBCH block is transmitted may be configured as a reference point for indication or calculation). If the terminal does not detect RMSI CORESET at the start time position indicated by the PBCH, the RMSI CORESET is continuously detected at a specified time window after the start time position indicated by the PBCH.
  • the length of the time window for detecting the RMSI CORESET may be preset (e.g., as specified by a standard protocol), or the length of the time window for detecting the RMSI CORESET may also be indicated by the PBCH.
  • the RMSI CORESET should occupy the entire initial BWP, and the DMRS corresponding to the RMSI CORESET also fills the entire initial BWP, which can be used for blind detection of the RMSI CORESET by the terminal. In the example of FIG.
  • the time position for transmitting the SS/PBCH block is located in a different time unit (eg, time slot) from the time position of its corresponding RMSI CORESET and RMSI PDSCH (or only RMSI PDSCH).
  • the time position of the time position for transmitting the SS/PBCH block and its corresponding RMSI CORESET and RMSI PDSCH (or only the RMSI PDSCH) may also be located in the same time unit (eg, time slot).
  • the network device can further improve the transmission flexibility of the system by sending the SS/PBCH block and the RMSICORESET and the RMSI PDSCH (or only the RMSI PDSCH) without corresponding correspondence after the LBT succeeds.
  • the sixth embodiment shows the resource mapping manner of the SS/PBCH block and the RMSI PDSCH in the 60KHz subcarrier spacing and the normal/extended CP scenario.
  • a joint transmission manner of an SS/PBCH block and its corresponding RMSICORESET and RMSI PDSCH can be as shown in FIG. Show: Each SS/PBCH block occupies 4 consecutive symbols, and its corresponding RMSICORESET and RMSI PDSCH (or RMSI PDSCH only) occupy 10 consecutive symbols, each SS/PBCH block and its corresponding RMSICORESET and RMSI PDSCH ( Or only RMSI PDSCH) occupy a 14-symbol slot.
  • the SS/PBCH block can be placed before the RMSICORESET and RMSI PDSCH (or only the RMSI PDSCH) or after the RMSICORESET and RMSI PDSCH (or only the RMSI PDSCH).
  • Four different SS/PBCH blocks and their respective corresponding RMSICORESET and RMSI PDSCH (or only RMSI PDSCH) can be placed in the 1ms time window. Multiple consecutive 1 ms time windows can be used to place the SS/PBCH block and its corresponding RMSICORESET and RMSI PDSCH (or RMSI PDSCH only).
  • RMSICORESET and RMSI PDSCH it can be transmitted for 10 consecutive OFDM symbols by changing its MCS, invalid data padding, and the like.
  • a joint transmission and transmission manner of an SS/PBCH block and its corresponding RMSICORESET and RMSI PDSCH may be as shown in the figure. 31: Each SS/PBCH block occupies 4 consecutive symbols, and its corresponding RMSICORESET and RMSI PDSCH (or RMSI PDSCH only) occupy 8 consecutive symbols, each SS/PBCH block and its corresponding RMSICORESET and RMSI.
  • the PDSCH (or RMSI PDSCH only) occupies a 12-symbol slot.
  • the SS/PBCH block can be placed before the RMSICORESET and RMSI PDSCH (or only the RMSI PDSCH) or after the RMSICORESET and RMSI PDSCH (or only the RMSI PDSCH).
  • Four different SS/PBCH blocks and their respective corresponding RMSICORESET and RMSI PDSCH (or only RMSI PDSCH) can be placed in the 1ms time window. Multiple consecutive 1 ms time windows can be used to place the SS/PBCH block and its corresponding RMSICORESET and RMSI PDSCH (or RMSI PDSCH only).
  • RMSICORESET and RMSI PDSCH it can be transmitted for 8 consecutive OFDM symbols by changing its MCS, invalid data padding, and the like.
  • FIG. 32 is a wireless communication system 10 provided by an embodiment of the present application, and a network device 500 and a terminal 400 in the wireless communication system 10.
  • the network device 500 may be the network device in the foregoing method embodiment
  • the terminal 400 may be the terminal in the foregoing method embodiment.
  • the network device 500 may include a communication unit 501 and a processing unit 503. among them:
  • the processing unit 503 is configured to generate the SS/PBCH block and the system information (such as the MIB) carried by the SS/PBCH block, the RMSI PDSCH, and the RMSI carried by the RMSI PDSCH to indicate the resource configuration of the PRACH, or the RMSI CORESET and the RMSI CORESET Resource indication information of the RMSI PDSCH.
  • system information such as the MIB
  • the communication unit 501 can be configured to send the SS/PBCH block, the RMSIPDSCH to the terminal 400, or also send the RMSICORESET.
  • processing unit 503 and the communication unit 501 can also be used to execute an LBT process.
  • LBT process please refer to the relevant provisions in the R13 version of 3gpp, which will not be described here.
  • the terminal 400 may include a processing unit 401 and a communication unit 403. among them:
  • the communication unit 403 can be configured to receive the SS/PBCH block, the RMSIPDSCH sent by the network device 500, or also receive the RMSICORESET.
  • the processing unit 401 is configured to parse the PBCH in the SS/PBCH block to obtain information about a resource location of the RMSIPDSCH or the RMSI CORESET.
  • the processing unit 401 is further configured to parse the indication information of the RMSI CORESET bearer to determine the time-frequency resource location of the RMSI PDSCH.
  • the present application provides two main schemes to solve the problem of SS/PBCH block and RMSI PDSCH transmission. The following mainly describes the specific implementation of the network device 500 and the terminal 400 in these two main schemes.
  • the RMSI CORESET is not required to indicate the resource configuration of the RMSI PDSCH, and the SS/PBCH block carries the indication information to indicate the resource configuration of the RMSI PDSCH.
  • the time position of the RMSI PDSCH corresponding to the SS/PBCH block is consecutively adjacent to the time position of the SS/PBCH block, where the SSB is carried in the SS/PBCH block, and the RMSI is carried in the RMSI PDSCH.
  • the time position at which the communication unit 501 in the network device 500 sends the SS/PBCH block may be a preset time position corresponding to the SS/PBCH block in the first time window. That is, the SS/PBCH block is transmitted at a fixed location.
  • the time position of the communication unit 403 in the terminal 400 receiving the SS/PBCH block may be a preset time position corresponding to the SS/PBCH block in the first time window. That is, the SS/PBCH block is received at a fixed location.
  • the symbol of the RMSI PDSCH that is not carried in the time interval may be It is filled by the first downlink signal.
  • the first downlink signal may include other downlink signals (such as reference signals such as CSI-RS) instead of the SS/PBCH block. In this way, discontinuous scheduling due to no downlink signal transmission at the time interval can be avoided, and channel access rights can be avoided, and multiple system information (carrying in multiple SS/PBCH blocks and their respective corresponding RMSI PDSCHs) can be realized.
  • the payload of the RMSI PDSCH is insufficient to fill the interval between two adjacent preset time positions in the first time window, that is, the duration of the RMSI PDSCH is less than the interval.
  • the first downlink signal may further include a partial RMSI PDSCH, that is, the time interval may be filled by using a partial RMSI PDSCH, and the receiving effect of the enhanced partial RMSI PDSCH may be achieved.
  • the time position at which the communication unit 501 in the network device 500 transmits the SS/PBCH block may not be the preset preset time position corresponding to the SS/PBCH block in the time window of the specific length. That is, the SS/PBCH block is not sent at a fixed location.
  • This other implementation is particularly applicable to the case where the payload of the RMSI PDSCH is insufficient to fill the interval between two adjacent preset time positions in the first time window.
  • the time position at which the communication unit 403 in the terminal 400 receives the SS/PBCH block may not be the preset preset time position corresponding to the SS/PBCH block in the time window of the specific length. That is, the SS/PBCH block is not received at a fixed location.
  • the communication unit 501 in the network device 500 sends the SS/PBCH under the condition that the payload of the RMSI PDSCH is insufficient to fill the interval between two adjacent preset time positions in the first time window.
  • the time position of the RMSI PDSCH corresponding to the block is consecutively adjacent to the time position of the next SS/PBCH block transmitting the SS/PBCH block.
  • the communication unit 403 in the terminal 400 receives the RMSI PDSCH corresponding to the SS/PBCH block and the time position of the next SS/PBCH block of the SS/PBCH block is consecutively adjacent.
  • the processing unit 401 in the terminal 400 except the time index carried by the PBCH. It is also necessary to determine the index of the system frame in which the system timing information is located, the index of the subframe, and the index of the symbol according to the number of symbols that the RMSI PDSCH continues to obtain the cell time synchronization.
  • the blank symbol may be used by the first downlink signal under the condition that there is a blank symbol near the boundary of the first time window. filling.
  • the blank symbol refers to a symbol that does not carry a downlink signal.
  • a blank symbol may exist at the boundary of the last RMSI PDSCH and 1 ms time window in the 1 ms time window, for which the network device may send other downlink signals for padding.
  • discontinuous scheduling due to the absence of downlink signal transmission of the blank symbol can be avoided, and loss of channel access rights can be avoided, and multiple first time windows can be continuously transmitted.
  • the signal transmission method described in the first scheme can also be applied to the NR system.
  • the network equipment in the NR system does not need to obtain channel access rights through the LBT, there is no problem of losing channel access rights.
  • the RMSI PDSCH and the SS/PBCH block are consecutively adjacent in the time domain, and the RMSI CORESET may not be required to indicate the resource configuration of the RMSI PDSCH, and the first indication information carried in the SS/PBCH block indicates the resource configuration of the RMSI PDSCH. It is also possible to save signaling overhead in the NR system.
  • the resource configuration of the RMSI CORESET is indicated by the PBCH in the SS/PBCH block
  • the resource configuration of the RMSI PDSCH is indicated by the RMSI CORESET.
  • the time position at which the communication unit 501 in the network device 500 sends the SS/PBCH block may be a preset time position corresponding to the SS/PBCH block in the first time window. That is, the SS/PBCH block is transmitted at a fixed location.
  • the time position of the communication unit 403 in the terminal 400 receiving the SS/PBCH block may be a preset time position corresponding to the SS/PBCH block in the first time window. That is, the SS/PBCH block is received at a fixed location.
  • the RMSI CORESET is not carried in the time interval or The sign of the RMSI PDSCH can be filled by the first downlink signal. In this way, discontinuous scheduling due to no downlink signal transmission at the time interval can be avoided, and channel access rights can be avoided, and multiple system information (carrying in multiple SS/PBCH blocks and their respective corresponding RMSI PDSCHs) can be realized. One-time complete delivery.
  • the first downlink signal may further include a partial RMSI PDSCH, that is, the time interval may be filled by using a partial RMSI PDSCH, and the receiving effect of the enhanced partial RMSI PDSCH may be achieved.
  • the time position at which the communication unit 501 in the network device 500 sends the SS/PBCH block may not be the preset preset time position of the SS/PBCH block in the first time window. That is, the SS/PBCH block is not sent at a fixed location.
  • the time position of the communication unit 403 in the terminal 400 receiving the SS/PBCH block may not be the preset preset time position of the SS/PBCH block in the first time window. That is, the SS/PBCH block is not received at a fixed location.
  • This other implementation is particularly applicable to the case where the payload of the RMSI CORESET and RMSI PDSCH is insufficient to fill the interval between two adjacent preset time positions in the first time window.
  • the time position of the next SS/PBCH block is sent under the condition that the duration of the RMSI CORESET and the RMSI PDSCH is less than the interval between two adjacent preset time positions in the first time window.
  • the time position of the RMSI PDSCH corresponding to the current SS/PBCH block is consecutively adjacent.
  • the blank symbol may be used by the first downlink signal under the condition that there is a blank symbol near the boundary of the first time window. filling.
  • the blank symbol refers to a symbol that does not carry a downlink signal. In this way, discontinuous scheduling due to the absence of downlink signal transmission of the blank symbol can be avoided, and loss of channel access rights can be avoided, and multiple first time windows can be continuously transmitted.
  • the embodiment of the present invention further provides a wireless communication system, which may be the wireless communication system 100 shown in FIG. 2 or the wireless communication system 10 shown in FIG. 32, and may include: a network device.
  • the terminal may be the terminal in the foregoing embodiment, and the network device may be the network device in the foregoing embodiment.
  • the terminal may be the terminal 300 shown in FIG. 10, and the network device may be the network device 400 shown in FIG.
  • the terminal may also be the terminal 400 shown in FIG. 32, and the network device shown may also be the network device 500 shown in FIG.
  • the network and the terminal reference may be made to the foregoing embodiments, and details are not described herein again.
  • the network device processor 405 is configured to control the transmitter 407 to transmit in the unlicensed band and/or the licensed band and control the receiver 409 to receive in the unlicensed band and/or the licensed band.
  • Transmitter 407 is used to support the network device to perform the process of transmitting data and/or signaling.
  • Receiver 409 is used to support the process by which the network device performs the reception of data and/or signaling.
  • the memory 405 is used to store program codes and data of the network device.
  • the transmitter 407 can be configured to send the SS/PBCH block and the RMSI PDSCH, and the time position of the RMSI PDSCH corresponding to the SS/PBCH block and the time position of the SS/PBCH block are consecutively adjacent.
  • the transmitter 407 is specifically configured to send the SS/PBCH block at a preset time position corresponding to the SS/PBCH block in the first time window, that is, send the SS/PBCH block at a fixed location.
  • the transmitter 407 may not send the SS/PBCH block in the corresponding preset time position of the SS/PBCH block in the first time window, that is, the SS/PBCH block is not sent in a fixed position.
  • the time position of the RMSI PDSCH corresponding to the SS/PBCH block is sent under the condition that the payload of the RMSI PDSCH is insufficient to fill the interval between two adjacent preset time positions in the first time window.
  • the time position of the next SS/PBCH block that sends the SS/PBCH block is consecutively adjacent.
  • the transmitter 407 is configured to send an SS/PBCH block, an RMSI CORESET, an RMSI PDSCH, a time position of transmitting the RMSI PDSCH, a time position at which the RMSI CORESET is transmitted, and a time when the SS/PBCH block is transmitted.
  • the positions are consecutively adjacent.
  • the transmitter 407 can be specifically configured to send the SS/PBCH block at a fixed time position corresponding to the SS/PBCH block in the first time window.
  • the transmitter 407 may not send the SS/PBCH block in the corresponding preset time position of the SS/PBCH block in the first time window, that is, the SS/PBCH block is not sent in a fixed position.
  • the RMSI corresponding to the current SS/PBCH block is sent under the condition that the payload of the RMSI CORESET and the RMSI PDSCH is insufficient to fill the interval between two adjacent preset time positions in the first time window.
  • the time position of the PDSCH is consecutively adjacent to the time position of the next SS/PBCH block that transmits the SS/PBCH block.
  • the receiver 409 can be configured to receive uplink data sent by the terminal on the idle frequency domain resource that is monitored.
  • the terminal processor 304 is configured to invoke an instruction stored in the memory 312 to control the transmitter 306 to transmit in an unlicensed band and/or a licensed band and to control the receiver 308 in an unlicensed band. And/or licensed bands for reception.
  • Transmitter 306 is used to support the terminal in performing the process of transmitting data and/or signaling.
  • Receiver 308 is used to support the process by which the terminal performs reception of data and/or signaling.
  • the memory 312 is used to store program codes and data of the terminal.
  • the receiver 308 is configured to receive the SS/PBCH block and the RMSI PDSCH sent by the network device, and the time position of receiving the RMSIPDSCH corresponding to the SS/PBCH block and the time position of receiving the SS/PBCH block are consecutively adjacent.
  • the receiver 308 can be specifically configured to receive the SS/PBCH block at a preset time position corresponding to the SS/PBCH block in the first time window, that is, receive the SS/PBCH block at a fixed location.
  • the receiver 308 may not receive the SS/PBCH block in the corresponding preset time position of the SS/PBCH block in the first time window, that is, the SS/PBCH block is not received at the fixed position.
  • the RMSI corresponding to the current SS/PBCH block is received under the condition that the payload of the RMSI CORESET and the RMSI PDSCH is insufficient to fill the interval between two adjacent preset time positions in the first time window.
  • the time position of the PDSCH is consecutively adjacent to the time position of the next SS/PBCH block receiving the SS/PBCH block.
  • the transmitter 306 can be configured to send uplink data on the monitored idle frequency domain resources.
  • FIG. 33 is a schematic structural diagram of a device provided by the present application.
  • apparatus 50 can include a processor 501, and one or more interfaces 502 coupled to processor 501. among them:
  • Processor 501 can be used to read and execute computer readable instructions.
  • the processor 501 may mainly include a controller, an operator, and a register.
  • the controller is mainly responsible for instruction decoding, and sends a control signal for the operation corresponding to the instruction.
  • the operator is mainly responsible for performing fixed-point or floating-point arithmetic operations, shift operations, and logic operations, as well as performing address operations and conversions.
  • the register is mainly responsible for saving the register operands and intermediate operation results temporarily stored during the execution of the instruction.
  • the hardware architecture of the processor 501 may be an Application Specific Integrated Circuits (ASIC) architecture, a MIPS architecture, an ARM architecture, or an NP architecture.
  • the processor 501 can be single core or multi-core.
  • the interface 502 can be used to input data to be processed to the processor 501, and can output the processing result of the processor 501 to the outside.
  • the interface 502 can be a General Purpose Input Output (GPIO) interface, and can be connected to multiple peripheral devices (such as a radio frequency module, etc.).
  • the interface 502 may also include a plurality of independent interfaces, such as an Ethernet interface, a mobile communication interface (such as an X1 interface), etc., responsible for communication between different peripheral devices and the processor 501, respectively.
  • the processor 501 can be used to invoke the implementation of the signal transmission method provided by one or more embodiments of the present application on the network device side or the terminal side from the memory, and execute the instructions included in the program.
  • Interface 502 can be used to output the execution results of processor 501.
  • the interface 503 can be specifically used to output the processing result of the processor 501.
  • processor 501 and the interface 502 can be implemented by using a hardware design or a software design, and can also be implemented by a combination of software and hardware, which is not limited herein.
  • the steps of the method or algorithm described in connection with the disclosure of the embodiments of the present invention may be implemented in a hardware manner, or may be implemented by a processor executing software instructions.
  • the software instructions may be composed of corresponding software modules, which may be stored in RAM, flash memory, ROM, Erasable Programmable ROM (EPROM), and electrically erasable programmable read only memory (Electrically EPROM).
  • EEPROM electrically erasable programmable read only memory
  • registers hard disk, removable hard disk, compact disk read only (CD-ROM) or any other form of storage medium known in the art.
  • An exemplary storage medium is coupled to the processor to enable the processor to read information from, and write information to, the storage medium.
  • the storage medium can also be an integral part of the processor.
  • the processor and the storage medium can be located in an ASIC. Additionally, the ASIC can be located in a transceiver or relay device.
  • the processor and the storage medium may also exist as discrete components in the radio access network device or the
  • the functions described in the embodiments of the present invention may be implemented in hardware, software, firmware, or any combination thereof.
  • the functions may be stored in a computer readable medium or transmitted as one or more instructions or code on a computer readable medium.
  • Computer readable media includes both computer storage media and communication media including any medium that facilitates transfer of a computer program from one location to another.
  • a storage medium may be any available media that can be accessed by a general purpose or special purpose computer.

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  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

La présente invention concerne un procédé de transmission de signal et un appareil associé et un système. Le procédé comprend les étapes suivantes : un appareil de réseau envoie un bloc de canal de diffusion physique/signal de synchronisation (bloc SS/PBCH) et un canal de liaison descendante physique d'informations de système minimum restant (RMSI PDSCH) correspondant au bloc SS/PBCH, une position temporelle à laquelle le RMSI PDSCH est envoyé et une position temporelle à laquelle le bloc SS/PBCH est envoyé sont consécutivement adjacentes, le bloc SS/PBCH transporte des premières informations d'indication, et les premières informations d'indication indiquent la durée du RMSI PDSCH. La solution réalise une transmission continue pour des informations de système dans un système NR-U et évite une perte de canal.
PCT/CN2019/086482 2018-05-11 2019-05-10 Procédé de transmission de signal et appareil associé et système Ceased WO2019214740A1 (fr)

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