WO2021159344A1 - Procédé et appareil de transmission de bloc de signaux de synchronisation, et procédé et appareil de réception de bloc de signaux de synchronisation - Google Patents

Procédé et appareil de transmission de bloc de signaux de synchronisation, et procédé et appareil de réception de bloc de signaux de synchronisation Download PDF

Info

Publication number
WO2021159344A1
WO2021159344A1 PCT/CN2020/074940 CN2020074940W WO2021159344A1 WO 2021159344 A1 WO2021159344 A1 WO 2021159344A1 CN 2020074940 W CN2020074940 W CN 2020074940W WO 2021159344 A1 WO2021159344 A1 WO 2021159344A1
Authority
WO
WIPO (PCT)
Prior art keywords
ssb
ofdm symbol
slot
index
time slot
Prior art date
Application number
PCT/CN2020/074940
Other languages
English (en)
Chinese (zh)
Inventor
袁世通
黄煌
高宽栋
刘凤威
Original Assignee
华为技术有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 华为技术有限公司 filed Critical 华为技术有限公司
Priority to PCT/CN2020/074940 priority Critical patent/WO2021159344A1/fr
Publication of WO2021159344A1 publication Critical patent/WO2021159344A1/fr

Links

Images

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/26—Systems using multi-frequency codes

Definitions

  • This application relates to the field of communication technology, and in particular to a method for sending, receiving, and a device for a synchronization signal block (synchronization signal/physical broadcast channel, or synchronization signal block for short).
  • a synchronization signal block synchronization signal/physical broadcast channel, or synchronization signal block for short.
  • CP cyclic prefix
  • NCP normal cyclic prefix
  • the fifth generation of mobile communication technology (the 5th generation, 5G) new radio (NR) system needs to support a large system bandwidth in the high frequency band (above 52.6 GHz) and requires a larger sub-carrier spacing. Larger subcarrier spacing will shorten the CP time of the OFDM symbol, but the time required for the network device to perform beam switching depends on the hardware implementation capability of the network device (the beam switching time of most network devices is on the order of 100ns). According to the solution of performing beam switching in the CP phase in the prior art, when the sub-carrier spacing reaches 480 kHz or above, the CP time is too short, it is difficult to support the beam switching, and the communication function will be affected.
  • the embodiments of the present application provide a method for transmitting a synchronization signal block, a method for receiving, and a device, which are used to solve the problem that the CP time is too short under the large subcarrier interval in the prior art to support beam switching.
  • a method for sending an SSB including: a network device sends a first OFDM symbol and a second OFDM symbol in a time slot where the SSB needs to be sent, wherein the CP type of the first OFDM symbol is ECP, and The CP type of the second OFDM symbol is NCP; the network device sends the SSB on the first OFDM symbol.
  • the ECP and NCP frame formats are used to send signals in the time slots where SSB needs to be sent, and the ECP frame format is used to send SSB, which ensures that beam switching can proceed smoothly under large subcarrier intervals;
  • the number of available symbols in the slot is more than when the ECP format is used purely, ensuring high resource utilization.
  • the network device may also send first indication information to the terminal device, where the first indication information is used to indicate that the symbol type of the OFDM symbol occupied by the SSB is the first OFDM symbol
  • the type or the CP type used to indicate the OFDM symbol occupied by the SSB is ECP.
  • the terminal device can know that in the time slot where the SSB needs to be sent by the network device, the SSB is sent according to the frame structure of the ECP, and then the SSB is received based on the frame structure of the ECP, so as to ensure the reliability of communication.
  • the first indication information is carried in the MIB or RMSI of the SSB.
  • the network device may also send second indication information to the terminal device, where the second indication information is used to indicate the position of the SSB in the time slot.
  • the terminal device can determine the position of the SSB in the time slot according to the second indication information, and then receive the SSB at the position according to the ECP frame format, so as to ensure the reliability of communication.
  • the second indication information includes the index of the OFDM symbol occupied by the SSB and the offset of the OFDM symbol occupied by the SSB, wherein the offset is configured simultaneously in the time slot The deviation of the position of the OFDM symbol occupied by the SSB when the first OFDM symbol and the second OFDM symbol are relative to the position of the OFDM symbol occupied by the SSB when all the second OFDM symbols are configured in the time slot shift.
  • the terminal device can know the offset, and then can find the starting sampling point of the first OFDM symbol according to the offset, and receive the SSB based on the ECP frame format to ensure the reliability of communication.
  • the network device may also determine the set of candidate sending positions of the SSB in the time slot,
  • the candidate transmission position set includes a plurality of candidate transmission positions; the network device configures the first OFDM symbol on some candidate transmission positions in the candidate transmission position set, and divides all the candidate transmission positions in the candidate transmission position set.
  • the second OFDM symbol is configured in a position other than the partial candidate transmission position.
  • the network device can flexibly select the transmission location of the SSB from the candidate transmission location set, which can improve the flexibility of the solution.
  • the network device may also send third indication information to the terminal device, where the third indication information is used to indicate that the symbol type of the OFDM symbol at the other position is the second OFDM symbol.
  • the symbol or the CP type used to indicate the OFDM symbol at the other position is the NCP.
  • the terminal can know according to the third indication information which candidate sending positions the network device actually sends the SSB, and at which candidate sending positions the SSB is not actually sent, and then according to the ECP on the candidate sending positions that actually sent the SSB. Receive the signal and receive the signal according to the NCP at the candidate sending position where the SSB is not actually sent to ensure the reliability of communication.
  • an SSB transmission method which includes: when the carrier interval is 480KHz or more, the network device determines multiple candidate transmission positions of the SSB in the time slot in which the SSB needs to be transmitted, and each of the candidate transmission positions For the network device to transmit one of the SSBs, one or more OFDM symbols are spaced between at least one pair of adjacent candidate transmission positions among the multiple candidate transmission positions; The SSB is sent at the sending location.
  • the network device can transmit based on the adjacent candidate transmission positions.
  • One or more OFDM symbols are spaced between positions to perform beam switching, which solves the problem that the CP time is too short to support beam switching.
  • the network device determining the multiple candidate transmission positions of the SSB in the time slot in which the SSB needs to be sent includes: the network device determines the start symbol of the SSB in the time slot in which the SSB needs to be sent Index, where the starting symbol index is the identifier of the first OFDM symbol among the OFDM symbols that the SSB needs to occupy.
  • the network device only needs to find the start symbol index of the SSB in the time slot in which the SSB needs to be sent, and can accurately send the SSB, which reduces the complexity of communication.
  • the start symbol index S of the SSB in a half frame may be:
  • This implementation manner provides multiple implementation manners of the start symbol index of the SSB in a half frame, which not only can ensure the beam switching of the network device when the subcarrier spacing SCS is 480KHz, but also improves the flexibility of the solution.
  • the start symbol index S of the SSB in a half frame may be:
  • X is the offset, and the value of X is a positive or negative number.
  • This implementation manner provides multiple implementation manners of the start symbol index of the SSB in a half frame, which not only can ensure the beam switching of the network device when the subcarrier spacing SCS is 480KHz, but also improves the flexibility of the solution.
  • the start symbol index S of the SSB in a half frame may be:
  • This implementation manner provides multiple implementation manners of the start symbol index of the SSB in a half frame, which not only can ensure the beam switching of the network equipment when the subcarrier spacing SCS is 960KHz, but also improves the flexibility of the scheme.
  • the start symbol index S of the SSB in a half frame may be:
  • Y is the offset, and the value of Y is a positive or negative number.
  • This implementation manner provides multiple implementation manners of the start symbol index of the SSB in a half frame, which not only can ensure the beam switching of the network equipment when the subcarrier spacing SCS is 496KHz, but also improves the flexibility of the solution.
  • the network device configures candidate transmission positions of the SSB in M time slots, where the M At most two candidate sending positions are configured in any one of the time slots, and each candidate sending position is used for the network device to send one of the SSB, and M is a positive integer; the network device is in the M time slots.
  • the SSB is sent at the candidate sending position configured in the slot.
  • At most two candidate transmission position SSBs are configured in any one of the M time slots.
  • it can ensure that at least one symbol is left between adjacent SSBs, so that the network device can use the interval symbols to perform Beam switching, so as to solve the problem of insufficient CP length under large subcarrier spacing, which causes beam switching failure.
  • it is beneficial to the configuration of the uplink and downlink ratio (such as ensuring that the uplink and downlink ratio is 4:1, 8:2, 16:4 Or 32:8, etc.) to improve the utilization of network resources.
  • the index value slot_index of the time slots for which candidate transmission positions are not configured among the M time slots satisfies one or more of the following rules:
  • This implementation manner provides multiple configuration methods for the index values of the time slots for which candidate transmission positions are not configured in the M time slots when the ratio of the number of uplink and downlink symbols is 4:1, which improves the flexibility of the solution.
  • the index value slot_index of the time slot for which no candidate transmission position is configured among the M time slots satisfies one or more of the following rules:
  • This implementation manner provides multiple configuration methods for the index values of the time slots for which candidate transmission positions are not configured in the M time slots when the ratio of the number of uplink and downlink symbols is 8:2, which improves the flexibility of the solution.
  • the SSBs that need to be transmitted in the M time slots include K SSB groups, and all SSB groups contain the same number of SSBs; the M time slots include K time slot groups, and all time slots include K time slot groups. Slot groups contain the same number of time slots; the K SSB groups are evenly distributed in the K time slot groups, one time slot group contains one SSB group, and the time when the SSB groups in all time slot groups are located The gap position is the same.
  • the SSB is evenly distributed in the M time slots, which not only ensures that the network equipment can successfully complete the beam switching under a large subcarrier interval, but also ensures a reasonable uplink and downlink ratio.
  • a method for receiving an SSB including: a terminal device receives a first OFDM symbol and a second OFDM symbol in a time slot that needs to receive the SSB, wherein the CP type of the first OFDM symbol is ECP, and The CP type of the second OFDM symbol is NCP; the terminal device receives the SSB on the first OFDM symbol.
  • the method further includes: the terminal device receives first indication information; the terminal device determines according to the first indication information that the symbol type of the OFDM symbol occupied by the SSB is the The type of the first OFDM symbol or the CP type of the OFDM symbol occupied by the SSB is determined to be ECP.
  • the first indication information is carried in the main information block MIB or the remaining minimum system information RMSI of the SSB.
  • the method further includes: the terminal device receives second indication information; and the terminal device determines the position of the SSB in the time slot according to the second indication information.
  • the second indication information includes the index of the OFDM symbol occupied by the SSB and the offset of the OFDM symbol occupied by the SSB, wherein the offset is configured simultaneously in the time slot The deviation of the position of the OFDM symbol occupied by the SSB when the first OFDM symbol and the second OFDM symbol are relative to the position of the OFDM symbol occupied by the SSB when all the second OFDM symbols are configured in the time slot shift.
  • the first OFDM symbol is configured on a part of candidate transmission positions in the set of candidate transmission positions
  • the second OFDM symbol is configured in the set of candidate transmission positions except for the part of candidate transmission positions. In other locations outside the location.
  • the method further includes: the terminal device receives third indication information; the terminal device determines, according to the third indication information, that the symbol type of the OFDM symbol in the other position is all The CP type of the second OFDM symbol or the OFDM symbol at the other position is the NCP.
  • a method for receiving SSB which includes: when the carrier interval is above 480KHz, a terminal device determines multiple candidate transmission positions of the SSB in a time slot in which the SSB needs to be received, and each of the candidate transmission positions For the terminal device to receive one of the SSBs, one or more OFDM symbols are spaced between at least a pair of adjacent candidate transmission positions among the plurality of candidate transmission positions; Receiving the SSB at the candidate sending location.
  • the terminal device determining the multiple candidate sending positions of the SSB in the time slot that needs to receive the SSB includes: the terminal device determines the start symbol of the SSB in the time slot that needs to receive the SSB Index, where the starting symbol index is the identifier of the first OFDM symbol among the OFDM symbols that the SSB needs to occupy.
  • the start symbol index S of the SSB in a half frame is:
  • the start symbol index S of the SSB in a half frame is:
  • X is the offset, and the value of X is a positive or negative number.
  • the start symbol index S of the SSB in a half frame is:
  • the start symbol index S of the SSB in a half frame is:
  • Y is the offset, and the value of Y is a positive or negative number.
  • the terminal device may determine the candidate sending position of the SSB in M time slots, where the M At most two candidate sending positions can be configured in any one of the time slots, and each candidate sending position is used for the terminal device to receive one of the SSB, and M is a positive integer; the candidate determined by the terminal device The SSB is received at the sending location.
  • the index value slot_index of the time slot for which no candidate transmission position is configured among the M time slots satisfies one or more of the following rules:
  • the index value slot_index of the time slot for which no candidate transmission position is configured among the M time slots satisfies one or more of the following rules:
  • the SSBs to be received in the M time slots include K SSB groups, and all SSB groups contain the same number of SSBs; the M time slots include K time slot groups, and all the time slots include K time slot groups. Slot groups contain the same number of time slots; the K SSB groups are evenly distributed in the K time slot groups, one time slot group contains one SSB group, and the time when the SSB groups in all time slot groups are located The gap position is the same.
  • a communication device is provided.
  • the device may be the network device in the first aspect or the device in the network device, and the device includes a device for performing any possible implementation as in the first aspect.
  • the module of the method described in the method E.g:
  • a processing module configured to determine to send the first OFDM symbol and the second OFDM symbol in the time slot where the SSB needs to be sent;
  • the sending module is configured to send the first OFDM symbol and the second OFDM symbol in the time slot where the SSB needs to be sent, wherein the cyclic prefix CP type of the first OFDM symbol is an extended cyclic prefix ECP, and the CP of the second OFDM symbol The type is normal cyclic prefix NCP; the SSB is sent on the first OFDM symbol
  • a communication device is provided.
  • the device may be the network device in the second aspect described above, or a device in the network device, and the device includes a device for performing any possible implementation as in the second aspect
  • the module of the method described in the method E.g:
  • the processing module is used to determine multiple candidate sending positions of the SSB in the time slot in which the SSB needs to be sent when the carrier interval is above 480KHz, and each of the candidate sending positions is used for the communication device to send one of the SSB, one or more OFDM symbols are spaced between at least a pair of adjacent candidate transmission positions among the plurality of candidate transmission positions;
  • the sending module is used to close and send the SSB at some or all of the candidate sending positions.
  • a communication device is provided.
  • the device may be the terminal device in the above third aspect, or the device in the terminal device, and the device includes a device for performing any possible implementation as in the above third aspect.
  • a processing module configured to determine to receive the first OFDM symbol and the second OFDM symbol in the time slot where the SSB needs to be received
  • the receiving module is configured to receive the first OFDM symbol and the second OFDM symbol in the time slot that needs to receive the SSB, wherein the cyclic prefix CP type of the first OFDM symbol is an extended cyclic prefix ECP, and the CP of the second OFDM symbol The type is normal cyclic prefix NCP; the SSB is received on the first OFDM symbol.
  • a communication device is provided.
  • the device may be the terminal device in the fourth aspect or the device in the terminal device, and the device includes a device for performing any possible implementation as in the fourth aspect.
  • the processing module is configured to determine multiple candidate transmission positions of the SSB in the time slot where the SSB needs to be received when the carrier interval is above 480KHz, and each candidate transmission position is used for the terminal device to receive one of the SSB, one or more OFDM symbols are spaced between at least a pair of adjacent candidate transmission positions among the plurality of candidate transmission positions;
  • the receiving module is configured to receive the SSB at some or all of the candidate sending positions.
  • a communication device including:
  • At least one processor and a memory and a communication interface communicatively connected with the at least one processor;
  • the memory stores instructions that can be executed by the at least one processor, and the at least one processor executes the above-mentioned first aspect, second aspect, third aspect, or first aspect by executing the instructions stored in the memory.
  • a computer-readable storage medium including a program or instruction.
  • the program or instruction runs on a computer, it executes any of the above-mentioned first, second, third, or fourth aspects. The method described in one possible implementation.
  • a chip is provided, the chip is coupled with a memory, and is used to read and execute program instructions stored in the memory to implement the above-mentioned first aspect, second aspect, third aspect or fourth aspect Any of the methods described in the possible implementations.
  • Figure 1 is a schematic diagram of the subcarrier spacing and duration corresponding to several different parameter sets
  • Figure 2 is a schematic diagram of a network device sending a synchronization signal
  • Figure 3 is a schematic diagram of the structure of a synchronization signal block
  • Figure 4 shows the possible placement of SSB under several SCS
  • FIG. 5 is a network architecture applicable to the embodiments of this application.
  • FIG. 6 is a flowchart of a method for sending an SSB according to an embodiment of the application
  • Fig. 7 is a schematic diagram of an OFDM symbol in the NCP format and an OFDM symbol in the NCP format;
  • Figure 8 is a comparison diagram of three frame structures
  • Fig. 9 is a comparison diagram of the candidate sending position and the actual sending position of the SSB.
  • FIG. 10 is a flowchart of another SSB sending method provided by an embodiment of this application.
  • Figure 11 is a schematic diagram of the specific symbol positions of the SSB in the time slot
  • FIG. 12 is a schematic structural diagram of a communication device 1200 according to an embodiment of this application.
  • FIG. 13 is a schematic structural diagram of a communication device 1300 according to an embodiment of this application.
  • FIG. 14 is a schematic structural diagram of a communication device 1400 according to an embodiment of the application.
  • FIG. 15 is a schematic structural diagram of a communication device 1500 according to an embodiment of this application.
  • FIG. 16 is a schematic structural diagram of a communication device 1600 provided in an embodiment of this application.
  • the 5th generation of mobile communication technology (the 5th generation, 5G) new radio (NR) system introduces the concept of "numerology", which is mainly used to determine orthogonal frequency division multiplexing (OFDM) components.
  • the frequency domain width ie, subcarrier spacing (SCS)
  • SCS subcarrier spacing
  • time domain length or duration or duration
  • the OFDM subcarrier signal in LTE has only a subcarrier width of 15kHz, and the corresponding time domain length is 66.67 ⁇ s. .
  • the 5G NR system can support multiple parameter sets, and different parameter sets can correspond to different subcarrier intervals.
  • Table 1 shows the carrier spacing corresponding to several parameter sets specified in the technical specification (TS) 38.211 of the 3rd generation partnership project (3rd generation partnership project, 3GPP):
  • ⁇ ⁇ f 2 ⁇ ⁇ 15[kHz] 0 15 1 30 2 60 3 120 4 240
  • ⁇ is the configuration index of the parameter set
  • ⁇ f is the subcarrier spacing. It can be seen from Table 1 that in addition to adopting the existing 15kHz subcarrier spacing of LTE, the NR system also introduces additional subcarrier spacing of 30kHz, 60kHz, 120kHz, and 240kHz.
  • Fig. 1 there are shown the subcarrier intervals and durations corresponding to several different parameter sets, where the horizontal direction represents the time domain, and the vertical direction represents the frequency domain. According to Fig. 1, it can be seen that the larger the sub-carrier spacing of the OFDM sub-carrier signal, the shorter the duration of the corresponding OFDM symbol.
  • CP cyclic prefix
  • Table 2 shows the subcarrier spacing, OFDM symbol duration, and cyclic prefix (CP) length corresponding to several parameter sets. It should be understood that the type of CP in Table 2 is a normal cyclic prefix (NCP).
  • NCP normal cyclic prefix
  • network equipment broadcasts a common reference signal (CRS) for terminal equipment to perform downlink synchronization and cell quality measurement.
  • CRS common reference signal
  • all downlink signals in the system are sent in the form of beams.
  • This kind of signal that provides downlink synchronization in the form of beams is called a synchronization signal.
  • the network equipment sends synchronization signals in all directions. , Within a period of time (for example, the current protocol is within 5ms), complete the transmission of synchronization signals in all directions, so that terminal equipment in different locations can perform downlink synchronization.
  • the network device sends a group of signals every 20ms, including multiple synchronization signals (here 20ms is only an example and not a limitation, the actual period can be greater than or less than 20ms), and multiple synchronization signals ensure the coverage of the network device.
  • a network device can cover a circular area, and the network device sends a sync signal block every 20ms to scan 360°.
  • the network device specifically sends a synchronization signal block (synchronization signal and PBCH block, SS/PBCH, referred to as SSB in full text) in the first 5ms of each 20ms cycle, and a total of 5ms Send 8 synchronization signal blocks (numbered 0-7).
  • the network device sends different synchronization signal blocks to different directions, and terminal devices located in different locations may detect one or more synchronization signal blocks issued by the network device.
  • a synchronization signal block is composed of a primary synchronization signal (primary synchronization signal, PSS), a secondary synchronization signal (secondary synchronization signal, SSS), and a physical broadcast channel (physical broadcast channel, PBCH).
  • PSS primary synchronization signal
  • SSS secondary synchronization signal
  • PBCH physical broadcast channel
  • a synchronization signal block occupies a bandwidth of 240 subcarriers in the frequency domain and 4 OFDM symbols in the time domain. The first symbol is used to transmit PSS, the second and fourth symbols are used to transmit PBCH, and the third symbol is used to transmit PBCH. Used to send SSS signal and part of PBCH content.
  • the maximum total number of synchronization signal blocks that a network device can send in a 5ms can be 4, 8 or 64, where the value of the maximum total number is related to the working frequency band of the network device, for example, a 5G network device working above 6GHz can send a maximum of 64 Synchronization signal blocks (the actual number of transmissions can be less than 64).
  • the position where the synchronization signal block is placed within 5 ms is related to the working frequency band of the network equipment and the sub-carrier spacing.
  • Figure 4 shows the possible placement of the SSB under several SCSs. Taking the signal in the last row of Figure 4 as an example, when the subcarrier spacing is 240kHz, the synchronization signal block is placed in the first half of 5ms (ie, the first 2.5ms).
  • the subcarrier spacing can only be 120kHz or 240kHz.
  • the frequency band resources are abundant, and in order to support larger bandwidth transmission, the maximum bandwidth of a single carrier can be further increased on the basis of Rel-16. If the carrier (system) bandwidth continues to increase, under a certain number of fast Fourier transform (FFT) points, the bandwidth of each subcarrier will be larger, which means that a higher subcarrier spacing is introduced. Limited by the complexity of implementation, the maximum number of FFT sampling points generally supported by the protocol is 2048.
  • FFT fast Fourier transform
  • the NR system may introduce sub-carrier spacing of 480kHz, 960kHz or even 1.92MHz in the frequency band above 52.6GHz.
  • the sending position of the synchronization signal block is directly given by the formula.
  • the second column in Table 3 is the formula directly given by the standard.
  • the specific value of S is the index position of the first symbol of the synchronization signal block (lasting 4 symbols).
  • the terminal device will delete the CP of the signal when processing the signal, so the network device generally performs beam switching during the transmission phase of the CP of the signal.
  • the time required for a network device to perform beam switching depends on the hardware implementation capability of the network device. At present, the beam switching time of most network devices is on the order of 100 ns.
  • the 5G NR system may need to support a large system bandwidth in the high-frequency band (above 52.6GHz), so a larger sub-carrier spacing is required, but a larger sub-carrier spacing will shorten the CP time, as shown in the table As shown in 4, the CP length corresponding to the 480kHz subcarrier spacing is about 130ns, and the CP length corresponding to the 960kHz subcarrier spacing is about 65ns.
  • the CP time will be greatly shortened, it is difficult to support the beam switching, and the communication function will be affected.
  • the synchronization signal cannot completely cover the coverage area of the network device, causing some terminal devices to fail to complete the downlink synchronization, or causing difficulty in implementation on the base station side, which greatly increases the implementation cost of the base station.
  • the technical solutions provided in the embodiments of the present application can solve the above-mentioned problems.
  • the network device in the embodiment of the present application may send the first OFDM symbol and the second OFDM symbol in the time slot where the SSB needs to be sent, and send the SSB on the first OFDM symbol, where the cyclic prefix CP type of the first OFDM symbol is extended cyclic Prefix (extended cyclic prefix, ECP), the CP type of the second OFDM symbol is normal cyclic prefix (NCP).
  • the length of the ECP is greater than the length of the NCP, so even if the sub-carrier spacing is large (for example, up to 480KHz or more), the length of the ECP can meet the length of the network device to switch beams Demand;
  • the network equipment uses NCP during the time period when the SSB does not need to be sent, compared to the pure ECP scheme, the number of symbols used to transmit effective signals is more, so the resource utilization rate can be improved.
  • the network device can determine multiple candidate sending positions of the SSB in the time slot in which the SSB needs to be sent, and each candidate sending position is used for the network device to send one SSB, and at least one pair of adjacent candidate sending positions among the multiple candidate sending positions One or more OFDM symbols are spaced between the positions, and the network device transmits the SSB on some or all of the candidate transmission positions.
  • the network device can perform beam switching on one or more OFDM symbols spaced between two adjacent SSBs, which can solve the problem that the CP time is too short to support beam switching.
  • the beam switching scenario in the embodiment of the present application is based on the beam switching scenario when the network device sends the synchronization signal block as an example.
  • the technical solution of the present application can also be applied to these beam switching scenarios, and those skilled in the art can adaptively make changes and modifications to the embodiments of the present application that do not depart from the spirit and scope of the embodiments of the present application to apply to other beam switching scenarios, for example, The SSB is replaced with signals in other beam switching scenarios. It should be understood that these changes and modifications also belong to the scope of protection of this application.
  • LTE long term evolution
  • 5G 5th generation
  • next-generation communication systems such as 6G system and so on.
  • the technical solutions of the embodiments of the present application can also be applied to other communication systems, as long as the communication system has a requirement for beam switching.
  • the communication system includes network equipment and terminals, and the network equipment and terminals can communicate with each other.
  • the network device may be a base station, or an access point, or may be a device that communicates with the wireless terminal through one or more sectors on the air interface in the access network.
  • the base station can be used to convert received air frames and IP packets into each other, and act as a router between the wireless terminal and the rest of the access network, where the rest of the access network can include an Internet Protocol (IP) network.
  • IP Internet Protocol
  • the base station can also coordinate the attribute management of the air interface. For example, base stations (NodeB), evolved base stations (eNodeB), base stations in the fifth generation (5G) communication system, base stations or base stations in future communication systems, access nodes in WiFi systems, and wireless relays Nodes, wireless backhaul nodes, etc.
  • the base station may also be a wireless controller in a cloud radio access network (cloud radio access network, CRAN) scenario.
  • the base station may also be a small station, a transmission reception point (TRP), a gNB, or a 6G-oriented NodeB, etc.
  • TRP transmission reception point
  • gNB transmission reception point
  • 6G-oriented NodeB 6G-oriented NodeB
  • the terminal involved in this application is a device with wireless transceiver function, which can be deployed on land, including indoor or outdoor, handheld, wearable, or vehicle-mounted; it can also be deployed on the water, such as on a ship; it can also be deployed in the air , Such as airplanes, balloons, and satellites.
  • the terminal may be a mobile phone (mobile phone), a tablet computer (pad), a computer with wireless transceiving function, virtual reality (VR) terminal equipment, augmented reality (AR) terminal equipment, industrial control (industrial control) control), wireless terminals in self-driving, wireless terminals in remote medical, wireless terminals in smart grid, and transportation safety Wireless terminals, wireless terminals in smart cities, wireless terminals in smart homes, wearable devices, in-vehicle devices, etc.
  • the embodiments of this application do not limit the application scenarios.
  • the terminal may sometimes be called user equipment (UE), access terminal equipment, UE unit, mobile station, mobile station, remote station, remote terminal equipment, mobile equipment, wireless communication equipment, UE agent or
  • the network architecture in Figure 5 is an example of communication between a network device and a terminal device.
  • the number of network devices and terminal devices in the communication system can be more.
  • the terminal and the terminal can also communicate with each other.
  • FIG. 6 is a flowchart of a method for sending an SSB according to an embodiment of this application. The method may be applied to the communication system shown in FIG. 5.
  • the network device sends the first OFDM symbol and the second OFDM symbol in the time slot where the SSB needs to be sent, where the CP type of the cyclic prefix of the first OFDM symbol is ECP, and the CP type of the second OFDM symbol is NCP.
  • the network device sends the SSB on the first OFDM symbol.
  • the terminal device receives the first OFDM symbol and the second OFDM symbol in the time slot that needs to receive the SSB, and receives the SSB on the first OFDM symbol. Since the method of receiving the SSB of the terminal device corresponds to the method of sending the network device, the resource configuration methods of the terminal device side and the network device side can be referred to each other. The following mainly uses the network device to send the SSB to introduce the resource configuration situation.
  • FIG. 7 is a schematic diagram of an OFDM symbol in the NCP format (ie, the second OFDM symbol) and an OFDM symbol in the NCP format (ie, the second OFDM symbol).
  • the CP is located at the front position of the OFDM symbol. It can be seen that the CP (ie ECP) length of the first OFDM symbol is greater than the CP (ie NCP) length of the second OFDM symbol, so even if the subcarrier spacing reaches 480kHz or more, the length of ECP can support the network equipment to perform beam switching. In turn, the reliability of the communication function is ensured.
  • the network device may also send first indication information to the terminal device to indicate that the symbol type of the OFDM symbol occupied by the SSB is the type of the first OFDM symbol, or indicates The CP type of the OFDM symbol occupied by the SSB is ECP.
  • the terminal device can know that in the time slot where the SSB needs to be sent by the network device, the SSB is sent according to the frame structure of the ECP, and then the SSB is received based on the frame structure of the ECP.
  • the network device may carry the first indication information in the master information block (MIB) of the SSB, or carry the first indication in the remaining minimum system information (RMSI) of the SSB Information, so you can save system overhead.
  • MIB master information block
  • RMSI remaining minimum system information
  • the terminal device determines to receive the SSB according to the first OFDM symbol.
  • the terminal may use the second OFDM symbol to receive the SSB by default.
  • the network device further sends second indication information to the terminal device, which is used to indicate the position of the SSB in the time slot.
  • the terminal device can determine the position of the SSB in the time slot according to the second indication information, and receive the SSB at the position according to the ECP frame format, so as to ensure the reliability of communication.
  • the second indication information may include: the position of the OFDM symbol occupied by the SSB when the first OFDM symbol and the second OFDM symbol are simultaneously configured in the time slot relative to when all the second OFDM symbols are configured in the time slot
  • the value of the offset may be a positive value or a negative value.
  • the second indication information may further include: the index of the synchronization signal block (SS/PBCH block index), for example, the index of the first OFDM symbol occupied by the SSB.
  • the network device may configure one or more offsets, or configure a combination of one or more offsets and the index of the synchronization signal block.
  • Figure 8 is a comparison diagram of the three frame structures.
  • Figure 8 shows the frame structure when the system only has NCP, the frame structure when the system only has ECP type, and the system includes both NCP and ECP types from top to bottom.
  • the frame structure Since ECP is longer than NCP, the length of a single OFDM symbol in the ECP type frame structure is greater than the length of a single OFDM symbol in the NCP type frame structure, and the number of OFDM symbols in a slot in the ECP type frame structure The number of OFDM symbols in one slot is more than that in the ECP type frame structure.
  • a slot is composed of 14 consecutive OFDM symbols, as shown in the first row in Fig.
  • the starting position of the synchronization signal can be configured in the second (third from 0) OFDM symbol of ECP, lasting 16 symbols (4 SS/PBCH) Block, each block occupies 4 symbols), the offset of the synchronization signal block is equal to the difference between the length of the two first OFDM symbols and the length of the two second OFDM symbols, and the offset position can be located at No. 1 (from 0 starts after the second) OFDM symbol, and before the second (third from 0) OFDM symbol.
  • the second indication information sent by the network device to the terminal device may include the offset, that is, the difference, and the terminal device can find the starting sampling point of the first OFDM symbol according to the offset, based on the ECP frame format Receive SS/PBCH and complete downlink synchronization.
  • FIG. 8 is only an example and not a limitation.
  • the starting position of the synchronization signal may also be at other OFDM symbol positions, and the offset may also be set before or after other OFDM symbol positions.
  • the second indication information may also indicate the index and/or offset of other OFDM symbols occupied by the SSB. Not limited.
  • the second indication information may be broadcast through system messages, or high-level signaling such as radio resource control (radio resource control, RRC) messages, or medium access control (MAC)
  • RRC radio resource control
  • MAC medium access control
  • CE control element
  • the network device may send the first OFDM symbol and the second OFDM symbol in the time slot where the SSB needs to be sent.
  • the network device may send the first OFDM symbol and the second OFDM symbol in the time slot where the SSB needs to be sent.
  • the network device Before the second OFDM symbol, first determine the set of candidate transmission positions of the SSB in the time slot, where the candidate transmission position set includes multiple candidate transmission positions, and then the network device locates some or all of the candidate transmission positions in the candidate transmission position set.
  • the first OFDM symbol is configured, and the second OFDM symbol is configured at the remaining time positions in the time slot.
  • the network device does not necessarily send the SSB at all candidate sending positions.
  • the network device can indicate to the terminal device which candidate sending locations actually send SSB and which candidate sending locations do not send SSB, so that the terminal can receive signals according to ECP at the candidate sending locations where the SSB is actually sent.
  • the candidate transmission position that has not transmitted the SSB receives the signal according to the NCP.
  • the network device configures the first OFDM symbol on the first part of the candidate transmission position in the candidate transmission position set, and places other than the first part of the candidate transmission position in the candidate transmission position set (the second part of the candidate transmission position) Configure the second OFDM symbol on the top. Then the network device may send third indication information to the terminal device, where the third indication information is used to indicate that the symbol type of the OFDM symbol at the second part of the candidate transmission position is the second OFDM symbol or is used to indicate the symbol type of the OFDM symbol at the second part of the candidate transmission position.
  • the CP type of the OFDM symbol is NCP; or, the network device may send fourth indication information to the terminal device, where the fourth indication information is used to indicate that the symbol type of the OFDM symbol at the first part of the candidate transmission position is the first OFDM symbol or is used to indicate
  • the CP type of the OFDM symbol at the first part of the candidate transmission position is ECP; or the network device may send fifth indication information to the terminal device, and the fifth indication information is used to indicate that the symbol type of the OFDM symbol at the second part of the candidate transmission position is the first
  • the CP type of the OFDM symbol or the OFDM symbol at the second part of the candidate transmission position is NCP, and the symbol type used to indicate the OFDM symbol at the first part of the candidate transmission position is the first OFDM symbol or the OFDM at the first part of the candidate transmission position
  • the CP type of the symbol is ECP.
  • the candidate transmission positions include SS/PBCH i, SS/PBCH i+1, SS/PBCH i+2, SS/PBCH i+3, but in fact, the network equipment is only in SS/PBCH i+2.
  • the network equipment When SS/PBCH is sent on SS/PBCH i+3, the network equipment will indicate to the terminal device that SS/PBCH i and SS/PBCH i+1 are not sent, so that the terminal device will be Data is sent and received according to the frame format of NCP, or timing and synchronization are performed according to the frame format of NCP.
  • the ECP and NCP frame formats are used to send signals in the time slot where SSB needs to be sent, and the SSB is sent through the ECP frame format to ensure that beam switching can be performed smoothly under large subcarrier intervals; at the same time, the time slot
  • the number of available symbols in the ECP format is more than that when the ECP format is used purely, ensuring high resource utilization.
  • FIG. 10 is a flowchart of another SSB sending method provided in an embodiment of this application, and the method may be applied to the communication system shown in FIG. 5.
  • the network device determines multiple candidate sending positions of the SSB in the time slot in which the SSB needs to be sent, and each candidate sending position is used for the network device to send one SSB.
  • One or more OFDM symbols are spaced between at least a pair of adjacent candidate transmission positions among the candidate transmission positions;
  • the network device sends the SSB at some or all of the determined candidate sending positions.
  • the terminal device determines multiple candidate transmission positions of the SSB in the time slot that needs to receive the SSB, and each candidate transmission position is used for the terminal device to receive one SSB.
  • the multiple candidate transmission positions At least one pair of adjacent candidate transmission positions is separated by one or more OFDM symbols; the terminal device receives the SSB at some or all of the determined candidate transmission positions. Since the method of receiving the SSB of the terminal device corresponds to the method of sending the network device, the resource configuration methods of the terminal device side and the network device side can be referred to each other. The following mainly uses the network device to send the SSB to introduce the resource configuration situation.
  • the set of candidate sending locations of SSB can be configured by the network equipment and indicated to the terminal; it can also be the set of candidate sending locations configured with SSB in the protocol, and the network equipment and the terminal determine the candidate sending of SSB according to the protocol.
  • the location collection is not limited here in the embodiment of the application.
  • the specific implementation for the network device to determine the set of candidate transmission positions of the SSB in the time slot in which the SSB needs to be transmitted may be determined by determining the start symbol index of the SSB, where the start symbol index may be occupied by the SSB.
  • the ID of the first OFDM symbol in the OFDM symbols may be determined by determining the start symbol index of the SSB, where the start symbol index may be occupied by the SSB.
  • the start symbol index S of the SSB in the half frame may be:
  • the above configuration rules may have a certain offset.
  • the start symbol index S of the SSB in a half frame may also be:
  • X is the offset, and the value of X is a positive or negative number.
  • Example 2 When the subcarrier interval of the communication system is 960KHz, the start symbol index S of the SSB in the half frame can be:
  • the above configuration rules may have a certain offset.
  • the start symbol index S of the SSB in a half frame may also be:
  • Y is the offset, and the value of Y is a positive or negative number.
  • the maximum number of synchronization signal blocks that the network device can transmit in a half frame may be 64.
  • the maximum number of synchronization signal blocks that a network device can send in a half frame is greater than or equal to 128, and the starting symbol index configuration rule is still There can be other forms.
  • Example 3 When the subcarrier interval SCS of the communication system is 480KHz and the maximum number of synchronization signal blocks that the network device can send is 128, the start symbol index S of the SSB in the half frame can be:
  • Example 4 When the subcarrier interval SCS of the communication system is 960KHz and the maximum number of synchronization signal blocks that can be sent by the network device is 128, the start symbol index S of the SSB in the half frame can be:
  • Example 5 When the subcarrier interval SCS of the communication system is 960KHz and the maximum number of synchronization signal blocks that can be sent by the network device is 256, the start symbol index S of the SSB in the half frame can be:
  • n 0,1,2,3,5,6,7,8,10,11,12,13,15,16,17,18.
  • Example 3 the configuration rules shown in Example 3, Example 4, and Example 5 may also have a certain offset.
  • specific offsets please refer to Example 1 or Example 2, which will not be repeated here.
  • the terminal device determines the hypothesis that the synchronization signal will receive the synchronization signal according to the position of the start symbol index in the any rule, Perform synchronization signal reception.
  • the network device may also indicate the type of synchronization signal sent to the terminal device through system message broadcast, or high-level signaling such as RRC layer signaling, for example, the symbol type used by the synchronization signal is the first OFDM.
  • SSB candidate transmission positions that is, at least one pair of adjacent candidate transmission positions among the multiple candidate transmission positions is separated by one or more OFDM symbols
  • the network device can be based on the distance between adjacent candidate transmission positions.
  • Performing beam switching at intervals of one or more OFDM symbols can solve the problem that the CP time is too short to support beam switching.
  • the base station uses the symbols between two SSBs to perform beam switching. The symbol is implemented based on the base station, and can no longer be used for sending and receiving other signals.
  • the frame structure design of NCP can also be used to improve resource utilization.
  • it can also be applied to the frame structure design of ECP, which has great flexibility.
  • this embodiment provides a more sparse SSB candidate transmission position configuration solution, which can simultaneously solve the problem that the CP is too short to support beam scanning for SSB transmission and the problem that there is no uplink scheduling opportunity in multiple consecutive time slots.
  • the network device can configure SSB candidate transmission positions in M time slots, where any one of the M time slots is configured with at most two candidate transmission positions, and each candidate transmission position is used for the network device to send one.
  • SSB M is a positive integer; the network device sends the SSB at some or all of the candidate sending positions configured in the M time slots.
  • the terminal equipment determines the candidate transmission positions of the SSB in M time slots, wherein any one of the M time slots is configured with at most two candidate transmission positions, and each candidate transmission position is used for the terminal equipment to receive one SSB.
  • M is a positive integer; the terminal device receives the SSB at some or all of the determined candidate sending positions.
  • the network device can send downlink in the first 4 time slots of a system frame (all 0, 1, 2, and 3 time slots are sent downlink), and then configure an uplink time slot (for example, consider its starting time slot number as At 0, the No. 4 time slot is configured to uplink).
  • this embodiment also considers switching between downlink transmission and uplink reception. For example, to ensure that the uplink time slot of the fifth time slot is all available and valid, there should be reserved for the downlink time slot before the time slot starts.
  • One or more OFDM symbols are used by the terminal equipment for transceiving conversion.
  • One possible design is that only one SSB is sent in the downlink time slot adjacent to the uplink time slot.
  • Table 5 to Table 10 are several possible SSB slot position configuration modes in this embodiment:
  • the numbers in Table 5 are the timeslot index values, the timeslot indicated by the timeslot index value shown in the table are configured with SSB, and the timeslot indicated by the timeslot index value not shown in the table are not configured with SSB .
  • the time slot index value with "()" added to the table indicates that the time slot indicated by the time slot index value is adjacent to a non-SSB time slot, and two SSBs are configured in the time slot, such as time slots 3, 7, and Two SSBs are configured in 13, 15, etc.;
  • the time slot index value without "()" in the table indicates that the time slot indicated by the time slot index value is not adjacent to a non-SSB time slot, and one SSB is configured in the time slot
  • time slots 0, 1, 2, and 5 are configured with an SSB.
  • the numbers in Table 6 are the timeslot index values, the timeslot indicated by the timeslot index value shown in the table are configured with SSB, and the timeslot indicated by the timeslot index value not shown in the table are not configured with SSB .
  • the numbers in Table 7 are the timeslot index values, the timeslot indicated by the timeslot index value shown in the table are configured with SSB, and the timeslot indicated by the timeslot index value not shown in the table are not configured with SSB .
  • the time slot index value with "()" added to the table indicates that the time slot indicated by the time slot index value is adjacent to a non-SSB time slot, and one SSB is configured in the time slot.
  • the numbers in Table 8 are timeslot index values, the timeslot indicated by the timeslot index value shown in the table are configured with SSB, and the timeslot indicated by the timeslot index value not shown in the table are not configured with SSB .
  • the time slot index value with "()" added to the table indicates that the time slot indicated by the time slot index value is adjacent to a non-SSB time slot, and one SSB is configured in the time slot.
  • the numbers in Table 9 are the timeslot index values, the timeslot indicated by the timeslot index value shown in the table are configured with SSB, and the timeslot indicated by the timeslot index value not shown in the table are not configured with SSB .
  • the numbers in Table 10 are timeslot index values.
  • the timeslot indicated by the timeslot index value shown in the table are configured with SSB, and the timeslot indicated by the timeslot index value not shown in the table are not configured with SSB.
  • the time slot configured with the SSB in this document indicates that there are possible sending positions or candidate sending positions of the SSB in the time slot, that is, the protocol may define the sending opportunities or sending positions of the SSB in these time slots.
  • the network device may not send or only send a small amount of SSB at these sending opportunities or sending locations. The actual sending situation of the network device can be flexibly changed according to its own needs.
  • the slot position of the SSB mapping can be considered as shown in Table 5.
  • the index value slot_index of the slot for which no candidate transmission position is configured satisfies one or more of the following rules:
  • the slot position of the SSB may be as shown in Table 6 or Table 7 or Table 8.
  • the number of candidate SSBs may be the same or different. When both are 2, the number of intervals between two adjacent SSBs may be 2 or 1.
  • the slot position of the SSB mapping can be considered as shown in Table 8.
  • the index value slot_index of the slot for which no candidate transmission position is configured satisfies one or more of the following rules:
  • N 10
  • the corresponding configuration scheme can be as shown in Table 9 or as shown in Table 10.
  • the number of interval symbols between two adjacent SSBs can be 2 or 1.
  • the above 4:1, 4:1 ratio of the number of uplink and downlink symbols is only an example and not a limitation, and other changes may be made during specific implementation, for example, as shown in Table 11.
  • the numbers in Table 11 are timeslot index values, the timeslots indicated by the timeslot index values shown in Table 11 are configured with SSB, and the timeslots indicated by the timeslot index values not shown in the table are not configured with SSB.
  • the time slot indicated by each time slot index value shown in Table 11 can have two candidate SSB block transmission positions (64 in total), and the uplink and downlink ratio is 3:1 (for example, in every 20 time slots, there are 15 time slots are downlink time slots to send SSB, and another 5 can be configured as uplink).
  • the number of SSB time slots in this SSB time slot may be different from the number of other SSB time slots.
  • the number of SSBs in the SSB time slot can be 1, and the number of other SSB time slots can be 2, so that other symbols in the SSB time slot that are not occupied by the SSB can be used as switching gaps for switching the transmission direction.
  • the SSB time slot may not be restricted by the number of conditions above, that is, the SSB time slot is adjacent to the last non-SSB time slot, and its number can be the same as that of the normal SSB time slot (when configured with SSB). Slot, but not adjacent to a non-SSB slot).
  • the SSB timeslot indexes with "()" in Tables 5 to 9 all indicate the indexes of the SSB timeslots adjacent to the non-SSB timeslots.
  • the number of SSBs in the adjacent SSB time slots ie, time slots with "()" adjacent to the non-SSB time slot
  • the number of interval symbols between two adjacent SSBs can be 2 or 1.
  • the number of SSBs corresponding to the SSB slot index with "()" in Table 7 is 1.
  • the maximum value of the index of the SSB can be 64 or 128, and the values are sequentially selected according to the above rules until the maximum value is reached, as shown in Tables 5-10.
  • the position of the SSB in the time slot can have the following options:
  • the start symbol index of the SSB in each SSB slot can be 2 or 3 or 4 or 5 or 6 or 7 or 8 or 9 or 10 or 11.
  • the start symbol index of the first SSB is 2
  • the start symbol index of the second SSB is 8.
  • the index of the start symbol may be 2 or 3 or 4 or 5 or 6 or 7 or 8 or 9 or 10 or 11.
  • Solution 2 Place SSB evenly in all time slots. E.g:
  • the positions of 64 SSBs are divided into 16 groups with 4 SSBs in each group.
  • the time slot indicated by the time slot index value of "()" in Table 12 is the time slot configured with SSB, and there is no time slot index of "()"
  • the time slot indicated by the value is a time slot without SSB configured.
  • the positions of 64 SSBs are divided into 16 groups, and each group has 4 SSBs.
  • 160 time slots are divided into 16 groups, and 10 time slots are grouped into one group, then each group of SSB (4 SSBs) can occupy the first 4 time slots in each group of time slots, with only one SSB position in each time slot, or 4 SSBs can occupy the first 2 time slots, with two in each time slot
  • the location of an SSB As shown in Table 13, the time slots indicated by the time slot index values shown in Table 13 are all time slots configured with SSB, and there are two SSB positions in each time slot.
  • the positions of 64 SSBs are divided into 16 groups, and each group has 4 SSBs.
  • 320 time slots are divided into 16 groups, and 20 time slots are grouped into a group, then 4 SSBs can be Occupy the first 4 time slots, each time slot has only one SSB position or 4 SSBs can occupy the first 2 time slots, and each time slot has two SSB positions.
  • the positions of 64 SSBs are divided into 16 groups, and each group has 4 SSBs.
  • 640 time slots are divided into 16 groups, and 40 time slots are grouped into a group, then 4 SSBs can be Occupy the first 4 time slots, each time slot has only one SSB position or 4 SSBs can occupy the first 2 time slots, and each time slot has two SSB positions.
  • the value of K can be any one of 1, 2, 4, 8, 16, 32, 64
  • O is the maximum number of SSBs (for example, 64, 128, 256, etc.)
  • M is determined according to the number of subcarriers ( For example, it can be 80, 160, 320, 640, etc.)
  • Q can be calculated based on K and M, so that the position of the SSB can be calculated.
  • Different SCS situations can correspond to different K values, or under different SCS situations, the number or positions of SSBs in a time slot can be different.
  • the fixed number of SSBs are configured more sparsely, which can facilitate up and down Row configuration configuration (such as 4:1 or 8:2 or 16:4 or 32:8 uplink and downlink configuration) can improve network resource utilization; at the same time, sparse SSB configuration can allow adjacent SSBs At least one symbol is left in between, so that the network device can use the spaced symbols to perform beam switching, thereby solving the effect of beam switching failure on SSB beam scanning caused by insufficient CP length under large subcarrier spacing.
  • an embodiment of the present application provides a communication device 1200.
  • the device 1200 may be the network device in the foregoing method embodiment or the device in the network device.
  • the device 1200 includes A module for executing the method executed by the network device in the above method embodiment. E.g:
  • the processing module 1201 is configured to determine to send the first OFDM symbol and the second OFDM symbol in the time slot where the SSB needs to be sent;
  • the sending module 1202 is configured to send the first OFDM symbol and the second OFDM symbol in the time slot where the SSB needs to be sent, wherein the cyclic prefix CP type of the first OFDM symbol is the extended cyclic prefix ECP, and the second OFDM symbol
  • the CP type is a normal cyclic prefix NCP; the SSB is sent on the first OFDM symbol.
  • an embodiment of the present application provides a communication device 1300.
  • the device 1300 may be a network device in the foregoing method embodiment or a device in the network device.
  • the device 1300 includes A module for executing the method executed by the network device in the above method embodiment. E.g:
  • the processing module 1301 is configured to determine multiple candidate transmission positions of the SSB in the time slot in which the SSB needs to be transmitted when the carrier interval is above 480KHz, and each candidate transmission position is used for the communication device to transmit one transmission position.
  • the SSB one or more OFDM symbols are spaced between at least a pair of adjacent candidate transmission positions among the plurality of candidate transmission positions;
  • the sending module 1302 is configured to send the SSB on some or all of the candidate sending positions.
  • an embodiment of the present application provides a communication device 1400.
  • the device 1400 may be the terminal device in the foregoing method embodiment or the device in the terminal device.
  • the device 1300 includes A module for executing the method executed by the terminal device in the foregoing method embodiment. E.g:
  • the processing module 1401 is configured to determine to receive the first OFDM symbol and the second OFDM symbol in the time slot where the SSB needs to be received;
  • the receiving module 1402 is configured to receive the first OFDM symbol and the second OFDM symbol in the time slot where the SSB needs to be received, wherein the cyclic prefix CP type of the first OFDM symbol is the extended cyclic prefix ECP, and the second OFDM symbol
  • the CP type is a normal cyclic prefix NCP; the SSB is received on the first OFDM symbol.
  • an embodiment of the present application provides a communication device 1500.
  • the device 1500 may be the terminal device in the foregoing method embodiment or the device in the terminal device.
  • the device 1500 includes A module for executing the method executed by the terminal device in the foregoing method embodiment. E.g:
  • the processing module 1501 is configured to determine multiple candidate transmission positions of the SSB in the time slot where the SSB needs to be received when the carrier interval is above 480KHz, and each candidate transmission position is used for the terminal device to receive one transmission position.
  • the SSB one or more OFDM symbols are spaced between at least a pair of adjacent candidate transmission positions among the plurality of candidate transmission positions;
  • the receiving module 1502 is configured to receive the SSB at the part or all of the candidate sending positions.
  • an embodiment of the present application further provides a communication device 1600, including:
  • At least one processor 1601 and a memory 1602 that is communicatively connected with the at least one processor 1602; a communication interface 1603; the memory 1602 stores instructions that can be executed by the at least one processor 1601, and the at least one processor 1601 By executing the instructions stored in the memory, the method in the embodiment of the present application is executed.
  • the processor 1601 may be a general-purpose processor, a digital signal processor, an application specific integrated circuit, a field programmable gate array or other programmable logic device, a discrete gate or transistor logic device, a discrete hardware component, and can implement or execute the implementation of this application.
  • the general-purpose processor may be a microprocessor or any conventional processor or the like.
  • the steps of the method disclosed in combination with the embodiments of the present application may be directly embodied as being executed and completed by a hardware processor, or executed and completed by a combination of hardware and software modules in the processor.
  • the memory 1602 may be a non-volatile memory, such as a hard disk drive (HDD) or a solid-state drive (SSD), etc., or a volatile memory (volatile memory), such as a random access memory. (random-access memory, RAM).
  • the memory is any other medium that can be used to carry or store desired program codes in the form of instructions or data structures and that can be accessed by a computer, but is not limited to this.
  • the memory in the embodiments of the present application may also be a circuit or any other device capable of realizing a storage function for storing program instructions and/or data.
  • the communication interface 1603 is used for communication between the device 1600 and other modules, and it may be a circuit, a device, an interface, a bus, a software module, a transceiver, or any other device that can realize communication.
  • connection medium between the communication interface 1603, the processor 1601, and the memory 1602 is not limited in the embodiment of the present application.
  • the communication interface 1603, the processor 1601, and the memory 1602 are connected by a bus 1604 in FIG. 16, and the bus is represented by a thick line in FIG. , Is not limited.
  • the bus can be divided into an address bus, a data bus, a control bus, and so on. For ease of representation, only one thick line is used in FIG. 16, but it does not mean that there is only one bus or one type of bus.
  • the embodiments of the present application also provide a computer-readable storage medium, the computer-readable storage medium stores a computer program, the computer program includes program instructions, and when the program instructions are executed by a computer, Make the computer execute the method in the embodiment of the present application.
  • an embodiment of the present application further provides a chip, which is coupled with a memory, and is configured to read and execute program instructions stored in the memory to implement the method in the embodiment of the present application.
  • the embodiments of the present invention can be provided as a method, a system, or a computer program product. Therefore, the present invention may adopt the form of a complete hardware embodiment, a complete software embodiment, or an embodiment combining software and hardware. Moreover, the present invention may adopt the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-usable program codes.
  • computer-usable storage media including but not limited to disk storage, CD-ROM, optical storage, etc.
  • These computer program instructions can also be stored in a computer-readable memory that can guide a computer or other programmable data processing equipment to work in a specific manner, so that the instructions stored in the computer-readable memory produce an article of manufacture including the instruction device.
  • the device implements the functions specified in one process or multiple processes in the flowchart and/or one block or multiple blocks in the block diagram.
  • These computer program instructions can also be loaded on a computer or other programmable data processing equipment, so that a series of operation steps are executed on the computer or other programmable equipment to produce computer-implemented processing, so as to execute on the computer or other programmable equipment.
  • the instructions provide steps for implementing the functions specified in one process or multiple processes in the flowchart and/or one block or multiple blocks in the block diagram.

Landscapes

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

Abstract

L'invention concerne un procédé et un appareil de transmission de blocs de signaux de synchronisation, ainsi qu'un procédé et un appareil de réception de bloc de signaux de synchronisation, permettant de résoudre le problème de l'état de la technique selon lequel, lorsqu'un espacement de sous-porteuse est important, un temps de CP est trop court pour prendre en charge une commutation de faisceau. Le procédé de transmission de SSB comprend les étapes suivantes : un dispositif réseau transmet un premier symbole OFDM et un second symbole OFDM dans un créneau nécessaire pour transmettre un SSB, le type de CP du premier symbole OFDM étant un ECP, et le type de CP du second symbole OFDM étant un NCP ; et le dispositif réseau transmet le SSB sur le premier symbole OFDM.
PCT/CN2020/074940 2020-02-12 2020-02-12 Procédé et appareil de transmission de bloc de signaux de synchronisation, et procédé et appareil de réception de bloc de signaux de synchronisation WO2021159344A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/CN2020/074940 WO2021159344A1 (fr) 2020-02-12 2020-02-12 Procédé et appareil de transmission de bloc de signaux de synchronisation, et procédé et appareil de réception de bloc de signaux de synchronisation

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/CN2020/074940 WO2021159344A1 (fr) 2020-02-12 2020-02-12 Procédé et appareil de transmission de bloc de signaux de synchronisation, et procédé et appareil de réception de bloc de signaux de synchronisation

Publications (1)

Publication Number Publication Date
WO2021159344A1 true WO2021159344A1 (fr) 2021-08-19

Family

ID=77291361

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2020/074940 WO2021159344A1 (fr) 2020-02-12 2020-02-12 Procédé et appareil de transmission de bloc de signaux de synchronisation, et procédé et appareil de réception de bloc de signaux de synchronisation

Country Status (1)

Country Link
WO (1) WO2021159344A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2023040328A1 (fr) * 2021-09-14 2023-03-23 大唐移动通信设备有限公司 Procédé de détermination de créneau temporel ecp, équipement utilisateur et dispositif côté réseau
WO2023040582A1 (fr) * 2021-09-14 2023-03-23 大唐移动通信设备有限公司 Procédé d'indication dynamique d'un intervalle de temps ecp, station de base et support de stockage
WO2024021945A1 (fr) * 2022-07-27 2024-02-01 华为技术有限公司 Procédé de transmission de bloc de canal de radiodiffusion physique/signal de synchronisation et appareil de communication

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102055702A (zh) * 2009-10-30 2011-05-11 中兴通讯股份有限公司 下行链路解调参考信号的传输方法、基站、中继站及系统
US20180098342A1 (en) * 2016-09-30 2018-04-05 Qualcomm Incorporated Aligning slots allocated to extended cyclic prefix symbols with slots allocated to normal cyclic prefix symbols
CN110149294A (zh) * 2018-02-13 2019-08-20 华为技术有限公司 同步信号块的传输方法、通信装置及通信设备

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102055702A (zh) * 2009-10-30 2011-05-11 中兴通讯股份有限公司 下行链路解调参考信号的传输方法、基站、中继站及系统
US20180098342A1 (en) * 2016-09-30 2018-04-05 Qualcomm Incorporated Aligning slots allocated to extended cyclic prefix symbols with slots allocated to normal cyclic prefix symbols
CN110149294A (zh) * 2018-02-13 2019-08-20 华为技术有限公司 同步信号块的传输方法、通信装置及通信设备

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
ERICSSON: "Introduction of V2X", 3GPP DRAFT; R1-1913641, vol. RAN WG1, 6 December 2019 (2019-12-06), Reno, NV, USA, pages 1 - 16, XP051838220 *

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2023040328A1 (fr) * 2021-09-14 2023-03-23 大唐移动通信设备有限公司 Procédé de détermination de créneau temporel ecp, équipement utilisateur et dispositif côté réseau
WO2023040582A1 (fr) * 2021-09-14 2023-03-23 大唐移动通信设备有限公司 Procédé d'indication dynamique d'un intervalle de temps ecp, station de base et support de stockage
WO2024021945A1 (fr) * 2022-07-27 2024-02-01 华为技术有限公司 Procédé de transmission de bloc de canal de radiodiffusion physique/signal de synchronisation et appareil de communication

Similar Documents

Publication Publication Date Title
US11601932B2 (en) Information sending and receiving methods and devices
JP7027466B2 (ja) ランダムアクセス方法および装置
WO2019096291A1 (fr) Procédé et dispositif d'émission d'informations et procédé et dispositif de réception d'informations
CN103716895B (zh) 物理随机接入信道的资源确定方法及装置
JP2021083109A (ja) フレキシブルなリソース使用状況のための方法
CN109462890B (zh) 随机接入方法及装置
US20200163097A1 (en) Communication method, network device, and relay device
JP2021503224A (ja) 位相トラッキング参照信号送信
CA3049195A1 (fr) Procede et appareil de distribution d'informations systeme dans un systeme de communications sans fil
WO2020143482A1 (fr) Procédé et appareil de communication
WO2021159344A1 (fr) Procédé et appareil de transmission de bloc de signaux de synchronisation, et procédé et appareil de réception de bloc de signaux de synchronisation
KR20200097822A (ko) 데이터 전송 방법, 무선 네트워크 장치, 및 통신 시스템
TW201931879A (zh) 車聯網中用於傳輸數據的方法、終端設備和網路設備
JP2021503791A (ja) 検出ウィンドウ指示方法及び装置
EP3688915A1 (fr) Formats de nprach pour une transmission de nb-iot en mode tdd
KR20180123531A (ko) 정보 전송 방법 및 디바이스
WO2011147167A1 (fr) Procédé de transmission de messages, station de base, terminal, et système de communication multistandard
WO2020063929A1 (fr) Procédé et dispositif de transmission d'un signal de référence de découverte
CN110167165B (zh) 一种资源配置方法及装置
WO2022151948A1 (fr) Procédé destiné à déterminer des paramètres d'accès initiaux dans un spectre non autorisé en bande haute, et appareil associé
JP2021521669A (ja) クリアチャネルのリスニング方法、装置及び機器
CN110972295B (zh) 一种通信方法及设备
CN115696591A (zh) 一种资源确定方法及通信装置
CN118318491A (zh) 非地面网络中的卫星通信的方法和装置
CN114765868A (zh) 由用户设备执行的方法以及用户设备

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 20918577

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 20918577

Country of ref document: EP

Kind code of ref document: A1