WO2019179262A1 - 信号传输方法及网络设备 - Google Patents

信号传输方法及网络设备 Download PDF

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Publication number
WO2019179262A1
WO2019179262A1 PCT/CN2019/075187 CN2019075187W WO2019179262A1 WO 2019179262 A1 WO2019179262 A1 WO 2019179262A1 CN 2019075187 W CN2019075187 W CN 2019075187W WO 2019179262 A1 WO2019179262 A1 WO 2019179262A1
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WIPO (PCT)
Prior art keywords
ssb
network device
transmission direction
channel
ssbs
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PCT/CN2019/075187
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English (en)
French (fr)
Inventor
姜蕾
吴凯
鲁智
Original Assignee
维沃移动通信有限公司
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 维沃移动通信有限公司 filed Critical 维沃移动通信有限公司
Priority to EP19771341.5A priority Critical patent/EP3771127B1/en
Priority to ES19771341T priority patent/ES2941647T3/es
Priority to CA3094552A priority patent/CA3094552A1/en
Priority to UAA202006784A priority patent/UA127949C2/uk
Priority to US16/981,547 priority patent/US11665751B2/en
Publication of WO2019179262A1 publication Critical patent/WO2019179262A1/zh

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W74/00—Wireless channel access
    • H04W74/08—Non-scheduled access, e.g. ALOHA
    • H04W74/0866—Non-scheduled access, e.g. ALOHA using a dedicated channel for access
    • H04W74/0891—Non-scheduled access, e.g. ALOHA using a dedicated channel for access for synchronized access
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/0006—Assessment of spectral gaps suitable for allocating digitally modulated signals, e.g. for carrier allocation in cognitive radio
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W74/00—Wireless channel access
    • H04W74/08—Non-scheduled access, e.g. ALOHA
    • H04W74/0808—Non-scheduled access, e.g. ALOHA using carrier sensing, e.g. carrier sense multiple access [CSMA]
    • H04W74/0816—Non-scheduled access, e.g. ALOHA using carrier sensing, e.g. carrier sense multiple access [CSMA] with collision avoidance
    • 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), DMT
    • H04L5/0008—Wavelet-division
    • 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—Signaling for the administration of the divided path
    • H04L5/0094—Indication of how sub-channels of the path are allocated
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W56/00—Synchronisation arrangements
    • H04W56/001—Synchronization between nodes
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W74/00—Wireless channel access
    • H04W74/08—Non-scheduled access, e.g. ALOHA
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W74/00—Wireless channel access
    • H04W74/08—Non-scheduled access, e.g. ALOHA
    • H04W74/0833—Random access procedures, e.g. with 4-step access
    • H04W74/0841—Random access procedures, e.g. with 4-step access with collision treatment
    • H04W74/085—Random access procedures, e.g. with 4-step access with collision treatment collision avoidance
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W74/00—Wireless channel access
    • H04W74/08—Non-scheduled access, e.g. ALOHA
    • H04W74/0808—Non-scheduled access, e.g. ALOHA using carrier sensing, e.g. carrier sense multiple access [CSMA]

Definitions

  • the present disclosure relates to the field of communications technologies, and in particular, to a signal transmission method and a network device.
  • the unlicensed band can be used as a supplement to the licensed band to help operators expand the service.
  • unlicensed bands can operate in the 5 GHz, 37 GHz, and 60 GHz bands.
  • the large bandwidth (80 MHz or 100 MHz) of the unlicensed band can reduce the implementation complexity of the base station and User Equipment (UE) (also called terminal).
  • UE User Equipment
  • unlicensed frequency band is shared by multiple radio access technologies (RATs), such as WiFi, radar, Long Term Evolution Licensed-Assisted Access (LTE-LAA), etc.
  • RATs radio access technologies
  • LBT listen before talk
  • MCOT maximum channel occupancy time
  • the base station ie, gNB
  • SSB Synchronization Signal Block
  • NR-PSS New Radio Primary Synchronization Signal
  • NR-SSS New Radio Secondary Synchronization Signal
  • NR-PBCH New Radio Physical Broadcast Channel
  • the SSB period can be configured to ⁇ 5, 10, 20, 40, 80, 160 ⁇ ms. Regardless of the period, the SSB in the SS burst set is sent within a 5 ms time window.
  • the above SSB transmission mechanism is applicable to the licensed band, and the base station can periodically send the SSB. In the unlicensed band, the SSB transmission can no longer be guaranteed due to channel uncertainty.
  • the base station may not occupy the channel for the untransmitted SSB when transmitting the previous SSB, which may cause the channel to be used by other radio access technologies (Radio Access Technology, RAT). Or the transmission node is occupied.
  • Radio Access Technology RAT
  • Embodiments of the present disclosure provide a signal transmission method and a network device, so as to solve the problem for high-frequency SSB transmission, if the base station transmits the previous SSB before the transmission, the base station has no way to transmit the previous SSB.
  • the transmitted SSB occupies a channel, which may cause the channel to be occupied by another RAT or a transmission node.
  • an embodiment of the present disclosure provides a signal transmission method, which is applied to a network device, and includes:
  • channel sensing is performed on the transmission direction of the SSB before transmission of a synchronization signal block SSB;
  • the SSB is transmitted when the channel is detected to be idle.
  • an embodiment of the present disclosure further provides a network device, including:
  • a listening module configured to perform channel sensing on a transmission direction of the SSB before the transmission of a synchronization signal block SSB in an unlicensed frequency band
  • a transmission module configured to transmit the SSB when the listening channel is idle.
  • an embodiment of the present disclosure further provides a network device, including: a memory, a processor, and a computer program stored on the memory and executable on the processor, where the computer program is implemented by the processor to implement the foregoing The steps of the signal transmission method.
  • an embodiment of the present disclosure further provides a computer readable storage medium having stored thereon a computer program, the computer program being executed by a processor to implement the steps of the signal transmission method.
  • the beneficial effects of the embodiments of the present disclosure are: performing channel interception on the transmission direction of the SSB before the transmission of one SSB in the unlicensed frequency band, and transmitting the SSB when the listening channel is idle; thereby being available in the SSB Before the transmission, the SSB is monitored and the reliability of the SSB transmission is improved.
  • Figure 1 shows a schematic diagram of an SSB pattern with a subcarrier spacing of 15 kHz
  • FIG. 2 shows a first pattern diagram of an SSB with a subcarrier spacing of 30 kHz
  • FIG. 3 shows a second pattern diagram of an SSB with a subcarrier spacing of 30 kHz
  • FIG. 4 is a schematic diagram showing a pattern of an SSB with a subcarrier spacing of 120 kHz;
  • Figure 5 is a diagram showing a pattern of an SSB with a subcarrier spacing of 240 kHz;
  • FIG. 6 is a schematic flow chart showing a signal transmission method according to an embodiment of the present disclosure.
  • FIG. 7 is a schematic diagram showing a schematic diagram of a modified SSB with a subcarrier spacing of 120 kHz;
  • FIG. 8 is a schematic diagram showing a schematic diagram of a modified SSB with a subcarrier spacing of 240 kHz;
  • FIG. 9 is a second schematic diagram showing the SSB of the modified subcarrier spacing of 120 kHz.
  • Figure 10 is a third schematic diagram showing the SSB of the modified subcarrier spacing of 120 kHz;
  • Figure 11 shows a second schematic diagram of the SSB of the modified subcarrier spacing of 240 kHz
  • FIG. 12 is a third schematic diagram showing the SSB of the modified subcarrier spacing of 240 kHz;
  • Figure 13 shows a fourth schematic diagram of the SSB with a modified subcarrier spacing of 120 kHz
  • Figure 14 is a schematic diagram showing the transmission of the SSB
  • FIG. 15 is a block diagram of a network device in accordance with an embodiment of the present disclosure.
  • FIG. 16 is a structural block diagram of a network device according to an embodiment of the present disclosure.
  • the words “exemplary” or “such as” are used to mean an example, illustration, or illustration. Any embodiment or design described as “exemplary” or “such as” in the embodiments of the disclosure should not be construed as an advantage over other embodiments or designs. Rather, the use of the words “exemplary” or “such as” is intended to present the concepts in a particular manner.
  • the signal transmission method and network device provided by the embodiments of the present disclosure may be applied to a wireless communication system.
  • the wireless communication system may be a system using a fifth generation (5th generation, 5G) mobile communication technology (hereinafter referred to as a 5G system for short), and those skilled in the art may understand that the 5G NR system is merely an example and is not limited.
  • 5G fifth generation
  • the subcarrier spacing of the SSB When the subcarrier spacing of the SSB is in the low frequency band (referring to the frequency band below 6 GHz), it may be 15 kHz/30 kHz, at least one or two initial symbol reservations in 14 symbols of the slot. (preserve) for Downlink (DL) control. At least 2 trailing symbols are reserved for guard period (GP) and uplink (UL) control. There are at most two possible SSB time locations in a 14-symbol time slot. In the high frequency band (referring to the frequency band above 6 GHz), the subcarrier spacing of the SSB is 120 kHz / 240 kHz. When the subcarrier spacing of the SSB is 120 kHz, at least 2 of the starting symbols of the 14 symbol slots are reserved for DL control.
  • the subcarrier spacing of the SSB In the high frequency band (referring to the frequency band above 6 GHz), the subcarrier spacing of the SSB is 120 kHz, at least 2 of the starting symbols of the 14 symbol
  • At least 2 ending symbols are reserved for protection periods and UL control.
  • the subcarrier spacing of the SSB is 240 kHz
  • the SSB will be mapped onto two consecutive 14 symbol time slots.
  • At least 4 initial symbols in the first time slot are reserved for DL control.
  • At least 4 ending symbols of the second time slot are reserved for protection period and UL control.
  • the transmission pattern of the SSB in the related art is shown in FIG. 1 to FIG. 5 , wherein FIG. 1 is a schematic diagram of an SSB pattern with a subcarrier spacing of 15 kHz, and FIG.
  • FIG. 2 is a first pattern of an SSB with a subcarrier spacing of 30 kHz.
  • FIG. 3 is a schematic diagram of a second pattern of an SSB with a subcarrier spacing of 30 kHz
  • FIG. 4 is a schematic diagram of a SSB with a subcarrier spacing of 120 kHz
  • FIG. 5 is a schematic diagram of a SSB with a subcarrier spacing of 240 kHz.
  • Different SSBs can be transmitted by beamforming in different directions. Each SSB corresponds to one beam. The beam can also be called a spatial domain transmission filter.
  • the transmitting node needs to do the LET of multiple CCA slots before accessing the channel, and each CCA slot is 5us.
  • the CCA time slot is a random number less than or equal to 127.
  • the delay 8us starts to transmit. Therefore, the time of the extended CCA (extended CCA) is 8us+random (0to 127) ⁇ 5us.
  • FIG. 6 is a schematic flowchart of a signal transmission method according to an embodiment of the present disclosure.
  • the signal transmission method is applied to a network device, and includes:
  • Step 601 Perform channel interception on a transmission direction of the SSB in an unlicensed frequency band before transmitting a synchronization signal block SSB.
  • Step 602 The SSB is transmitted when the channel is detected to be idle.
  • step 602 when the channel is detected to be idle, the SSB is sent to the terminal.
  • the reliability of the SSB transmission is improved.
  • the target duration is in one of the following ways:
  • the target duration is equal to the duration of one idle channel assessment (CCA);
  • target duration delay duration + random (0, M) ⁇ N;
  • M is the maximum number of CCAs, and M is a positive integer less than 127, N is the duration of one CCA; random (0, M) is a random number between 0 and M.
  • the LBT of a CCA ie, one shot LBT
  • the transit time of the network device is less than 10 us, so about 15 us is reserved as the listening and transceiving conversion time of the network device.
  • the maximum value of the contention window (i.e., the maximum number M of CCAs mentioned above) can be greatly reduced in consideration of the actual channel occupation time of each SSB. For example, from 127 to 7 or 3, if the maximum value of the contention window is 3, it is necessary to reserve about 35us as the listening and transceiving conversion time of the network device.
  • the embodiment of the present disclosure mainly implements listening to each SSB before transmission from two different angles, one way is to change the transmission pattern of the SSB in the related art, and the other way is not to change the SSB in the related art. Transfer the pattern, but limit the transmission opportunities of the SSB.
  • step 601 is:
  • the interval OFDM symbol is disposed between two adjacent SSBs.
  • the number of spaced OFDM symbols between different SSBs may be different.
  • FIG. 7 is a schematic diagram of a modified SSB with a subcarrier spacing of 120 kHz. As shown in FIG. 7, in this case, there is at least 2 OFDM symbol intervals between every two SSBs.
  • FIG. 8 is a schematic diagram of a modified SSB with a subcarrier spacing of 240 kHz. As shown in FIG. 8, in this case, there is at least 4 OFDM symbol intervals between every two SSBs.
  • the SSB pattern can be modified by referring to the SSB with a subcarrier spacing of 120 kHz.
  • the SSB with a carrier spacing of 120 kHz has at least 4 OFDM symbols before the SSB as the LBT time, and for the SSB with the subcarrier spacing of 240 kHz, at least 8 OFDM symbols are reserved before the SSB as the LBT time.
  • 9 and FIG. 10 are schematic diagrams of a modified SSB with a subcarrier spacing of 120 kHz. In this case, there is at least 4 OFDM symbol intervals between every two SSBs.
  • 11 and FIG. 12 are schematic diagrams of a modified SSB with a subcarrier spacing of 240 kHz, in which case there is at least 8 OFDM symbol spacing between every two SSBs.
  • FIG. 9 and FIG. 10 cannot satisfy the transmission of 64 SSBs in a window of 5 ms.
  • One method is to appropriately delay the SSB based on the RRM measurement timing configuration (SMTC) window, and the other method is to design the SSB pattern according to the four time slots, and send every 4 time slots. 7 SSBs. Four OFDM symbols are reserved for channel sensing between each two SSBs. The design of the specific SSB is shown in Figure 13.
  • the pattern of the SSB is not limited to the above legend.
  • a pattern design manner that satisfies the SSB with an interval between any two SSBs belongs to the protection scope of the embodiment of the present disclosure, and the interval between any two SSBs is the channel listening time.
  • step 601 when there are at least two consecutive SSBs, the implementation of step 601 is:
  • the second SSB is located after the first SSB, and the second SSB is adjacent to the first SSB.
  • the previous SSB is first intercepted. If the channel in the transmission direction of the previous SSB is idle, the SSB is transmitted without transmitting the next SSB; If the channel in the transmission direction of the previous SSB is busy, it indicates that the SSB cannot be transmitted, and the OFDM symbol originally used to transmit the previous SSB is used for the interception of the transmission direction of the latter SSB, if the channel of the next SSB is in the transmission direction. For idle, the transmission of the SSB is performed on the OFDM symbol transmitting the latter SSB.
  • the consecutive SSBs include at least three, if the channel in the transmission direction of the first SSB is detected to be idle, in order to ensure that the third SSB can implement its channel before transmission. Listening, at this time, the transmission direction of the third SSB of the at least two SSBs should be intercepted within the OFDM symbol of the second SSB;
  • the third SSB is located after the second SSB, and the third SSB is adjacent to the second SSB.
  • the middle SSB of the three consecutive SSBs is no longer transmitted, so that the SSB without channel interception will not be transmitted, and each SSB is guaranteed to perform channel detection before transmission. listen.
  • This kind of implementation mainly does not change the pattern of the high frequency SSB in the related art, and realizes transmission on the unlicensed spectrum by limiting the transmission of the SSB.
  • For a 120 kHz SSB only one SSB can be sent in each time slot.
  • For a 240 kHz SSB at most two SSBs are sent in every two time slots.
  • the transmission direction of the first SSB in the slot is preferentially listened, and when the channel is empty, the first SSB is sent, and the transmission of the second SSB is skipped.
  • the transmission direction channel of one SSB is not empty, the transmission direction of the second SSB is intercepted in the OFDM symbol of the first SSB, and if the channel is empty, the second SSB is transmitted.
  • the specific transmission situation is as shown in FIG. 14, in which the slash filled box in FIG. 14 represents the OFDM symbol for performing SSB listening.
  • the SSBs that can be sent in sequence are the first, third, fourth, or first/second, fourth, of the two slots.
  • the four OFDM symbols in the middle of the two SSBs are LBT time.
  • the transmission direction channel of the first SSB is empty, the first SSB is transmitted, and then the channel of the third SSB in the transmission direction is intercepted in the OFDM symbol of the second SSB. If the channel is empty, the third SSB is transmitted. If the channel is busy, the channel in the transmission direction of the fourth SSB is intercepted in the OFDM symbol of the third SSB.
  • the transmission direction channel of the first SSB is busy, the channel in the transmission direction of the second SSB is intercepted in the OFDM symbol of the first SSB, and if the channel is empty, the second SSB is transmitted. Then, the channel of the fourth SSB in the transmission direction is intercepted in the OFDM symbol of the third SSB, and so on, until the transmission of the SSB is completed.
  • the SSBs that can be sequentially transmitted are the first SSB and the fourth SSB of the two slots. At least 8 OFDM symbols are reserved for each SSB for LBT.
  • the network device may also adopt an indexing manner of the SSB that does not transmit the network device, so that the SSB is not performed.
  • the indication of the index may be used to indicate whether the SSB is not performed.
  • the remaining minimum system information (RMSI) sent by the network device does not carry an index of the SSB transmitted by the network device;
  • the information element (IE) of the index of the SSB transmitted by the network device is not included in the protocol.
  • the first mode illustrates that the protocol agreement includes an information element of an index of the SSB transmitted by the network device, and the network device may select the index of the SSB when the RMSI is sent, or in this case.
  • the protocol stipulates that the network device does not carry the index of the SSB when transmitting the RMSI; the second case illustrates that when the communication protocol is formulated, the protocol does not include the field of the information element of the index of the SSB, and when implemented, This field of the information element of the index of the SSB may be deleted in the protocol agreement in the related art, so that the network device may not be restricted from sending the index of the SSB, and the two methods may be selected according to the actual application. use.
  • the embodiment of the present disclosure solves the problem of sending an SSB on an unlicensed frequency band, so that the interception of each SSB can be implemented before the transmission of the SSB, and the reliability of the SSB transmission is improved, thereby improving the RRM measurement of the terminal.
  • the accuracy of the initial access is improved.
  • an embodiment of the present disclosure further provides a network device 1500, including:
  • the intercepting module 1501 is configured to perform channel sensing on the transmission direction of the SSB before the transmission of the synchronization signal block SSB in the unlicensed frequency band;
  • the transmitting module 1502 is configured to transmit the SSB when the listening channel is idle.
  • the listening module 1501 is configured to:
  • the target duration is in one of the following ways:
  • the target duration is equal to the duration of one idle channel assessment CCA
  • target duration delay duration + random (0, M) ⁇ N;
  • M is the maximum number of CCAs, and M is a positive integer less than 127, N is the duration of one CCA; random (0, M) is a random number between 0 and M.
  • the listening module 1501 is configured to:
  • the interval OFDM symbol is disposed between two adjacent SSBs.
  • the listening module 1501 includes:
  • a first listening unit configured to listen to a transmission direction of a first one of the at least two SSBs
  • a second intercepting unit configured to: when the channel that hears the transmission direction of the first SSB is busy, the second one of the at least two SSBs in the OFDM symbol of the first SSB The SSB's transmission direction is listening;
  • a third intercepting unit configured to transmit the first SSB in an OFDM symbol of the first SSB when the channel in which the transmission direction of the first SSB is detected is idle, in the Not transmitting the second SSB in the OFDM symbols of the two SSBs;
  • the second SSB is located after the first SSB, and the second SSB is adjacent to the first SSB.
  • the listening module 1501 further includes:
  • a fourth intercepting unit configured to: when the channel in the transmission direction of the first SSB is idle, to the third of the at least two SSBs in the OFDM symbol of the second SSB Listening directions of the SSBs;
  • the third SSB is located after the second SSB, and the third SSB is adjacent to the second SSB.
  • the network device does not send an index of the SSB transmitted by the network device.
  • the index that the network device does not send the SSB transmitted by the network device is implemented in one of the following manners:
  • the remaining minimum system information RMSI sent by the network device does not carry an index of the SSB transmitted by the network device;
  • the information element IE of the index of the SSB transmitted by the network device is not included in the protocol.
  • the network device embodiment is a network device corresponding to the foregoing signal transmission method applied to the network device side, and all implementation manners of the foregoing embodiments are applicable to the network device embodiment, and can also be the same. Technical effect.
  • Embodiments of the present disclosure also provide a network device, including: a memory, a processor, and a computer program stored on the memory and executable on the processor, the computer program being implemented by the processor to implement the foregoing application to the network
  • a network device including: a memory, a processor, and a computer program stored on the memory and executable on the processor, the computer program being implemented by the processor to implement the foregoing application to the network
  • the embodiment of the present disclosure further provides a computer readable storage medium, wherein the computer readable storage medium stores a computer program, and when the computer program is executed by a processor, implementing the signal transmission method applied to the network device
  • a computer readable storage medium such as a read-only memory (ROM), a random access memory (RAM), a magnetic disk, or an optical disk.
  • FIG. 16 is a structural diagram of a network device according to an embodiment of the present disclosure, which can implement the above-described details of a signal transmission method applied to a network device side, and achieve the same effect.
  • network device 1600 includes a processor 1601, a transceiver 1602, a memory 1603, and a bus interface, wherein:
  • the processor 1601 is configured to read a program in the memory 1603 and perform the following process:
  • channel sensing is performed on the transmission direction of the SSB before transmission of a synchronization signal block SSB;
  • the SSB is transmitted by the transceiver 1602 when the channel is detected to be idle.
  • the bus architecture may include any number of interconnected buses and bridges, specifically linked by one or more processors represented by processor 1601 and various circuits of memory represented by memory 1603.
  • the bus architecture can also link various other circuits such as peripherals, voltage regulators, and power management circuits, which are well known in the art and, therefore, will not be further described herein.
  • the bus interface provides an interface.
  • Transceiver 1602 can be a plurality of components, including a transmitter and a receiver, providing means for communicating with various other devices on a transmission medium.
  • the processor 1601 is responsible for managing the bus architecture and general processing, and the memory 1603 can store data used by the processor 1601 in performing operations.
  • the processor 1601 reads the program in the memory 1603, and is further configured to:
  • the target duration is in one of the following ways:
  • the target duration is equal to the duration of one idle channel assessment CCA
  • target duration delay duration + random (0, M) ⁇ N;
  • M is the maximum number of CCAs, and M is a positive integer less than 127, N is the duration of one CCA; random (0, M) is a random number between 0 and M.
  • the processor 1601 reads the program in the memory 1603, and is further configured to:
  • the interval OFDM symbol is disposed between two adjacent SSBs.
  • the processor 1601 reads the program in the memory 1603, and is further configured to:
  • the second SSB is located after the first SSB, and the second SSB is adjacent to the first SSB.
  • the processor 1601 reads the program in the memory 1603, and is further configured to:
  • the transmission direction of the third SSB in the at least two SSBs is intercepted in the OFDM symbol of the second SSB.
  • the third SSB is located after the second SSB, and the third SSB is adjacent to the second SSB.
  • the network device does not send an index of the SSB transmitted by the network device.
  • the index that the network device does not send the SSB transmitted by the network device is implemented in one of the following manners:
  • the remaining minimum system information RMSI sent by the network device does not carry an index of the SSB transmitted by the network device;
  • the information element IE of the index of the SSB transmitted by the network device is not included in the protocol.
  • the network device may be a Global System of Mobile communication (GSM) or a Base Transceiver Station (BTS) in Code Division Multiple Access (CDMA), or may be a wideband code division multiple access.
  • GSM Global System of Mobile communication
  • BTS Base Transceiver Station
  • CDMA Code Division Multiple Access
  • a base station (NodeB, NB) in the (Wideband Code Division Multiple Access, WCDMA) may also be an evolved base station (Evolutional Node B, eNB or eNodeB) in LTE, or a relay station or an access point, or in a future 5G network.
  • the base station or the like is not limited herein.
  • the foregoing embodiment method can be implemented by means of software plus a necessary general hardware platform, and of course, can also be through hardware, but in many cases, the former is better.
  • Implementation Based on such understanding, the technical solution of the present disclosure, which is essential or contributes to the related art, may be embodied in the form of a software product stored in a storage medium (such as ROM/RAM, disk, CD-ROM).
  • the instructions include a number of instructions for causing a terminal (which may be a cell phone, computer, server, air conditioner, or network device, etc.) to perform the methods described in various embodiments of the present disclosure.

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Abstract

本公开提供了一种信号传输方法及网络设备，该信号传输方法，应用于网络设备，包括：在非授权频段，在一个同步信号块SSB传输之前，对SSB的传输方向进行信道侦听；在侦听到信道为空闲时，传输所述SSB。

Description

信号传输方法及网络设备
相关申请的交叉引用
本申请主张在2018年3月23日在中国提交的中国专利申请号No.201810247303.1的优先权，其全部内容通过引用包含于此。
技术领域
本公开涉及通信技术领域，特别涉及一种信号传输方法及网络设备。
背景技术
在未来通信系统中，非授权频段(unlicensed band)可以作为授权频段(licensed band)的补充帮助运营商对服务进行扩容。为了与新空口(New Radio，NR)部署保持一致并尽可能的最大化基于NR的非授权接入，非授权频段可以工作在5GHz、37GHz和60GHz频段。非授权频段的大带宽(80MHz或者100MHz)能够减小基站和用户设备(User Equipment，UE)(也称终端)的实施复杂度。由于非授权频段由多种无线接入技术(Radio Access Technology，RAT)共用，例如WiFi，雷达，长期演进授权辅助接入(Long Term Evolution Licensed-Assisted Access，LTE-LAA)等，因此在某些国家或者区域，非授权频段在使用时必须符合规则(regulation)以保证所有设备可以公平的使用该资源，例如在传输前要先进行信道侦听，即先听后说(listen before talk，LBT)，最大信道占用时间(maximum channel occupancy time，MCOT)等规则。
在NR通信系统中，为了初始接入，无线资源管理(Radio Resource Management，RRM)测量等，基站(即gNB)需要发送同步信号块(Synchronization Signal Block，即SSB)以供UE进行测量评估等。SSB由新空口主同步信号(New radio Primary Synchronization Signal，NR-PSS，NR-PSS)/新空口辅同步信号(New radio Secondary Synchronization Signal，NR-SSS)和新空口物理广播信道(New radio Physical Broadcast channel，NR-PBCH)组成，由基站周期性地发送。对连接(CONNECTED)/空闲(IDLE) 和非独立(non-standalone)的情况(case)，SSB的周期可配置为{5,10,20,40,80,160}ms。无论周期为多少，同步信号碰撞集(SS burst set)中的SSB都要在5ms的时间窗口内完成发送。
上述SSB的传输机制适用于licensed band，基站可以周期性地发送SSB。在unlicensed band，由于信道的不确定性，SSB的发送不再能被保证。
对于高频SSB传输，由于是基于模拟波束赋形，因此同一时刻只能传输一个波束方向。若在传输前针对多个SSB的传输方向做侦听，基站在传输前面的SSB的时候没有办法为未传输的SSB占用信道，可能导致信道被别的无线接入技术(Radio Access Technology，RAT)或者传输节点占用。
发明内容
本公开实施例提供一种信号传输方法及网络设备，以解决针对于高频SSB传输，若在传输前针对多个SSB的传输方向做侦听，基站在传输前面的SSB的时候没有办法为未传输的SSB占用信道，可能导致信道被别的RAT或者传输节点占用的问题。
第一方面，本公开实施例提供一种信号传输方法，应用于网络设备，包括：
在非授权频段，在一个同步信号块SSB传输之前，对SSB的传输方向进行信道侦听；
在侦听到信道为空闲时，传输所述SSB。
第二方面，本公开实施例还提供一种网络设备，包括：
侦听模块，用于在非授权频段，在一个同步信号块SSB传输之前，对SSB的传输方向进行信道侦听；
传输模块，用于在侦听到信道为空闲时，传输所述SSB。
第三方面，本公开实施例还提供一种网络设备，包括：存储器、处理器及存储在存储器上并可在处理器上运行的计算机程序，所述计算机程序被所述处理器执行时实现上述的信号传输方法的步骤。
第四方面，本公开实施例还提供一种计算机可读存储介质，所述计算机可读存储介质上存储有计算机程序，所述计算机程序被处理器执行时实现上 述的信号传输方法的步骤。
本公开实施例的有益效果是通过在非授权频段，在一个SSB传输之前，对SSB的传输方向进行信道侦听，在侦听到信道为空闲时，传输所述SSB；以此可以在SSB的传输之前，实现对SSB的侦听，提高了SSB传输的可靠性。
附图说明
为了更清楚地说明本申请实施例或相关技术中的技术方案，下面将对实施例或相关技术描述中所需要使用的附图作简单地介绍，显而易见地，下面描述中的附图仅仅是本申请中记载的一些实施例，对于本领域普通技术人员来讲，在不付出创造性劳动性的前提下，还可以根据这些附图获得其他的附图。
图1表示子载波间隔为15kHz的SSB图样示意图；
图2表示子载波间隔为30kHz的SSB的第一种图样示意图；
图3表示子载波间隔为30kHz的SSB的第二种图样示意图；
图4表示子载波间隔为120kHz的SSB的图样示意图；
图5表示子载波间隔为240kHz的SSB的图样示意图；
图6表示本公开实施例的信号传输方法的流程示意图；
图7表示修改后的子载波间隔为120kHz的SSB的图样示意图之一；
图8表示修改后的子载波间隔为240kHz的SSB的图样示意图之一；
图9表示修改后的子载波间隔为120kHz的SSB的图样示意图之二；
图10表示修改后的子载波间隔为120kHz的SSB的图样示意图之三；
图11表示修改后的子载波间隔为240kHz的SSB的图样示意图之二；
图12表示修改后的子载波间隔为240kHz的SSB的图样示意图之三；
图13表示修改后的子载波间隔为120kHz的SSB的图样示意图之四；
图14表示SSB的传输情况示意图；
图15为根据本公开实施例的网络设备的模块示意图；
图16为根据本公开实施例的网络设备的结构框图。
具体实施方式
下面将结合本公开实施例中的附图，对本公开实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例是本公开一部分实施例，而不是全部的实施例。基于本公开中的实施例，本领域普通技术人员在没有作出创造性劳动前提下所获得的所有其他实施例，都属于本公开保护的范围。
本申请的说明书和权利要求书中的术语“第一”、“第二”等是用于区别类似的对象，而不必用于描述特定的顺序或先后次序。应该理解这样使用的数据在适当情况下可以互换，以便这里描述的本申请的实施例，例如除了在这里图示或描述的那些以外的顺序实施。此外，术语“包括”和“具有”以及他们的任何变形，意图在于覆盖不排他的包含，例如，包含了一系列步骤或单元的过程、方法、系统、产品或设备不必限于清楚地列出的那些步骤或单元，而是可包括没有清楚地列出的或对于这些过程、方法、产品或设备固有的其它步骤或单元。此外，说明书以及权利要求中使用“和/或”表示所连接对象的至少其中之一，例如A和/或B，表示包含单独A，单独B，以及A和B都存在三种情况。
在本公开实施例中，“示例性的”或者“例如”等词用于表示作例子、例证或说明。本公开实施例中被描述为“示例性的”或者“例如”的任何实施例或设计方案不应被解释为比其它实施例或设计方案更具优势。确切而言，使用“示例性的”或者“例如”等词旨在以具体方式呈现相关概念。
下面结合附图介绍本公开的实施例。本公开实施例提供的信号传输方法及网络设备可以应用于无线通信系统中。该无线通信系统可以为采用第五代(5th Generation，5G)移动通信技术的系统(以下均简称为5G系统)，所述领域技术人员可以了解，5G NR系统仅为示例，不为限制。
在进行本公开实施例的说明时，首先对下面描述中所用到的一些概念进行解释说明。
当SSB的子载波间隔在低频频段(指的是低于6GHz的频段)可以是为15kHz/30kHz，14个符号(symbol)的时隙(slot)中至少一个或者两个起始的symbol预留(preserve)给下行链路(Downlink，DL)控制。至少2个结尾的符号预留给保护期间(guard period，GP)和上行链路(Uplink，UL)控 制。一个14个符号的时隙里至多有两个可能的SSB时间位置(time location)。在高频频段(指的是高于6GHz的频段)SSB的子载波间隔为120kHz/240kHz。当SSB的子载波间隔为120kHz时，14个符号的时隙中至少2个起始的符号预留给DL控制。至少2个结尾的符号预留给保护期间和UL控制。一个14个符号的时隙里至多有两个可能的SSB时间位置。当SSB的子载波间隔为240kHz时，SSB将映射到两个连续的14个符号的时隙上。第一个时隙中至少4个起始的符号预留给DL控制。第二个时隙的至少4个结尾的符号预留给保护期间和UL控制。两个连续的14个符号的时隙里至多有4个可能的SSB时间位置。相关技术中的SSB的传输图样(pattern)如图1至图5所示，其中，图1为子载波间隔为15kHz的SSB图样示意图，图2为子载波间隔为30kHz的SSB的第一种图样示意图，图3为子载波间隔为30kHz的SSB的第二种图样示意图，图4为子载波间隔为120kHz的SSB的图样示意图，图5为子载波间隔为240kHz的SSB的图样示意图。其中，不同的SSB可以在不同的方向上使用波束赋形(beamforming)进行传输，每个SSB对应一个波束(beam)，波束也可以被称为空域传输滤波器(spatial domain transmission filter)。
在高频频段unlicensed band上，传输节点在接入信道前需要做多个CCA时隙的LET，每个CCA时隙均为5us。CCA时隙是一个小于或等于127的随机数，当CCA检测信道为空时，延时8us开始传输。因此整个扩展的CCA(extended CCA)的时间为8us+random(0to 127)×5us。
具体地，如图6所示，图6为本公开实施例的信号传输方法的流程示意图，所述信号传输方法，应用于网络设备，包括：
步骤601，在非授权频段，在一个同步信号块SSB传输之前，对SSB的传输方向进行信道侦听；
步骤602，在侦听到信道为空闲时，传输所述SSB。
需要说明的是，步骤602中，在侦听到信道为空闲时，是将该SSB发送给终端。
本公开实施例中通过在每个SSB传输之前，对每个SSB的传输方向进行信道侦听，提高了SSB传输的可靠性。
需要说明的是，所述对SSB的传输方向进行信道侦听的具体实现方式为：
对所述SSB的传输方向进行目标时长的信道侦听；
其中，所述目标时长采用以下方式之一：
所述目标时长等于一次空闲信道评估(CCA)的时长；
根据公式：目标时长＝延时时长+random(0，M)×N，获取所述目标时长；
其中，M为CCA的最大个数，且M为小于127的正整数，N为一次CCA的时长；random(0，M)为0至M之间的随机数。
考虑到SSB的传输实际时间比较短，一次CCA的LBT(即one shot LBT)可以合理的提高SSB的发送机会，即做一个5us的LBT，若信道为空，则传输SSB。在高频频段，网络设备的转换时间(transient time)小于10us，因此预留15us左右作为网络设备的侦听和收发转换时间。
此外，如果采用多个CCA时隙的LBT机制，考虑到每个SSB的实际信道占用时间，可以大幅减小竞争窗口的最大值(即上面所提到的CCA的最大个数M)。例如从127减小为7或者3，若竞争窗口的最大值为3，则大约需要预留35us左右的时间作为网络设备的侦听和收发转换时间。
本公开实施例主要从两种不同的角度实现对传输前的每个SSB进行侦听，一种方式为改变相关技术中的SSB的传输图样，另一种方式是不改变相关技术中的SSB的传输图样，而是限制SSB的传输机会。
下面分别从这两个角度对本公开实施例的具体实现进行详细说明如下。
一、改变相关技术中的SSB的传输图样
在此种方式下，步骤601的实现方式为：
利用间隔OFDM符号，对SSB的传输方向进行信道侦听；
其中，所述间隔OFDM符号设置于相邻的两个SSB之间。
需要说明的是，不同的SSB之间的间隔OFDM符号的个数可以不相同。
需要说明的是，对于高频频段的SSB图样，在连续的两个SSB之间增加间隔(gap)，如果采用一次CCA的LBT，对于子载波间隔为120kHz的SSB，SSB前至少留2个OFDM符号作为LBT时间，而对于子载波间隔为240kHz的SSB，SSB之前至少留4个OFDM符号作为LBT时间。图7为修改后的 子载波间隔为120kHz的SSB的图样示意图，如图7所示，在此种情况下，每两个SSB之间至少有2个OFDM符号的间隔。图8为修改后的子载波间隔为240kHz的SSB的图样示意图，如图8所示，在此种情况下，每两个SSB之间至少有4个OFDM符号的间隔。
对于子载波间隔为30kHz的SSB，可以参照上面子载波间隔为120KHz的SSB的方式进行SSB图样的修改。
对于高频频段的SSB图样，在连续的两个SSB之间增加间隔(gap)，如果采用多个CCA时隙的LBT机制，假设竞争窗口(contention window)的最大值为3时，则对于子载波间隔为120kHz的SSB，SSB前至少留4个OFDM符号作为LBT时间，而对于子载波间隔为240kHz的SSB，SSB之前至少留8个OFDM符号作为LBT时间。图9和图10为修改后的子载波间隔为120kHz的SSB的图样示意图，在此种情况下，每两个SSB之间有至少有4个个OFDM符号的间隔。图11和图12为修改后的子载波间隔为240kHz的SSB的图样示意图，在此种情况下，每两个SSB之间至少有8个OFDM符号的间隔。
需要说明的是，对于子载波间隔为120kHz的SSB，图9和图10的设计无法满足5ms的窗内发送64个SSB。一种方法是对SSB基于RRM测量时序配置(SS block based RRM measurement timing configuration，SMTC)窗口适当延时，另一种方法是按照4个时隙为周期设计SSB的图样，每4个时隙发送7个SSB。每两个SSB之间预留4个OFDM符号做信道侦听，具体的SSB的图样设计如图13所示。
需要说明的是，SSB的图样不局限于上述图例。只要满足任意两个SSB之间的具有间隔的SSB的图样设计方式均属于本公开实施例的保护范围，任意两个SSB之间的间隔为信道侦听时间。
二、不改变相关技术中的SSB的传输图样，而是限制SSB的传输机会
在此种方式下，当存在连续的至少两个SSB时，步骤601的实现方式为：
对所述至少两个SSB中的第一个SSB的传输方向进行侦听；
在侦听到所述第一个SSB的传输方向的信道为忙，则在所述第一个SSB的OFDM符号内对所述至少两个SSB中的第二个SSB的传输方向进行侦听；
在侦听到所述第一个SSB的传输方向的信道为闲时，在所述第一个SSB 的OFDM符号内传输所述第一个SSB，在所述第二个SSB的OFDM符号内不传输所述第二个SSB；
其中，所述第二个SSB位于所述第一个SSB之后，且所述第二个SSB和所述第一个SSB相邻。
需要说明的是，当存在连续的两个SSB需要进行传输，先对前一个SSB进行侦听，若前一个SSB的传输方向的信道为空闲，则传输该SSB，而不传输后一个SSB；若前一个SSB的传输方向的信道为忙，则表明这个SSB无法传输，则利用原本用来传输前一个SSB的OFDM符号进行后一个SSB的传输方向的侦听，若后一个SSB的传输方向的信道为空闲，则在传输该后一个SSB的OFDM符号上进行该SSB的传输。
进一步，还需要说明的是，当连续的SSB包含至少三个时，若侦听到所述第一个SSB的传输方向的信道为空闲，为了保证第三个SSB在传输前能实现其信道的侦听，此时，应该在在所述第二个SSB的OFDM符号内对所述至少两个SSB中的第三个SSB的传输方向进行侦听；
其中，所述第三个SSB位于所述第二个SSB之后，且所述第三个SSB和所述第二个SSB相邻。
在此种情况下，三个连续的SSB之中的中间一个SSB不再进行传输，以此可以实现未进行信道侦听的SSB不会被发送，保证每个SSB在发送前均进行了信道侦听。
此种实现方式，主要是不改变相关技术中的高频SSB的图样，通过限制SSB的传输来实现在非授权频谱上的发送。对于120kHz的SSB，每个时隙里面只能发送一个SSB，对于240kHz的SSB，每两个时隙里面至多发送两个SSB。
对于120k的SSB，优先对时隙内的第一个SSB的传输方向进行侦听，当信道为空时发送第一个SSB，跳过第二个SSB的传输。当一个SSB的传输方向信道不为空时，在第一个SSB的OFDM符号内对第二个SSB的传输方向进行侦听，若信道为空，则发送第二个SSB。具体传输情况如图14所示，其中，图14中的斜线填充框表示进行SSB侦听的OFDM符号。
对于240kHz SSB，若采用一次CCA的LBT，则可依次发送的SSB为两 个slot中的第一个、第三个/第四个，或者第一个/第二个、第四个。两个SSB中间的4个OFDM符号为LBT时间。由图14可知，若第一个SSB的传输方向信道为空，则传输第一个SSB，然后在第二个SSB的OFDM符号内对第三个SSB的传输方向的信道做侦听。若信道为空则传输第三个SSB，若信道为忙，则在第三个SSB的OFDM符号内对第四个SSB的传输方向的信道做侦听。若第一个SSB的传输方向信道忙，则在第一个SSB的OFDM符号内对第二个SSB的传输方向的信道做侦听，若信道为空，则传输第二个SSB。然后在第三个SSB的OFDM符号内对第四个SSB的传输方向的信道做侦听，依次类推，直到完成SSB的发送。
对于240kHz SSB，若采用多个CCA时隙的LBT机制，且竞争窗口的最大值为3时，则可依次发送的SSB为两个时隙中的第一个SSB、第四个SSB。每个SSB至少预留8个OFDM符号做LBT。
若连续的几个SSB传输方向一致，则只需要在第一个SSB之前针对该传输方向做一次LBT即可。若信道为空，则所有连续的SSB均可发送。若信道不为空，继续在其他SSB之前侦听信道。
进一步需要说明的是，在非授权频段上，由于SSB的发送不能保证，因此，本公开实施例中，所述网络设备还可以采用不发送网络设备传输的SSB的索引方式，以此不进行SSB的索引的指示。
具体地，为了实现不发送网络设备传输的SSB的索引，可以采用以下两种方式中的一种实现：
1、所述网络设备发送的剩余最小系统信息(RMSI)中不携带所述网络设备传输的SSB的索引；
2、协议约定中不包含所述网络设备传输的SSB的索引的信息元素(IE)。
需要说明的是，第一种方式说明的是，协议约定中包含网络设备传输的SSB的索引的信息元素，网络设备可以自行选择在发送RMSI时，不携带SSB的索引，或者在此种情况下，协议约定网络设备在发送RMSI时不携带该SSB的索引；第二种情况说明的是，在制定通信协议时，协议中不再包含SSB的索引的信息元素的这一字段，具体实现时，可以是在相关技术中的协议约定中删除该SSB的索引的信息元素的这一字段，这样可以从根源上限制网络设 备不需要再发送SSB的索引，此两种方式可以根据实际应用情况进行选择使用。
本公开实施例解决了在非授权频段上SSB的发送问题，以此可以在SSB的传输之前，实现对每个SSB的侦听，提高了SSB传输的可靠性，进而提升了终端的RRM测量、初始接入的准确性。
如图15所示，本公开实施例还提供一种网络设备1500，包括：
侦听模块1501，用于在非授权频段，在一个同步信号块SSB传输之前，对SSB的传输方向进行信道侦听；
传输模块1502，用于在侦听到信道为空闲时，传输所述SSB。
进一步地，所述侦听模块1501，用于：
对所述SSB的传输方向进行目标时长的信道侦听；
其中，所述目标时长采用以下方式之一：
所述目标时长等于一次空闲信道评估CCA的时长；
根据公式：目标时长＝延时时长+random(0，M)×N，获取所述目标时长；
其中，M为CCA的最大个数，且M为小于127的正整数，N为一次CCA的时长；random(0，M)为0至M之间的随机数。
进一步地，所述侦听模块1501，用于：
利用间隔OFDM符号，对SSB的传输方向进行信道侦听；
其中，所述间隔OFDM符号设置于相邻的两个SSB之间。
可选地，当存在连续的至少两个SSB时，所述侦听模块1501，包括：
第一侦听单元，用于对所述至少两个SSB中的第一个SSB的传输方向进行侦听；
第二侦听单元，用于在侦听到所述第一个SSB的传输方向的信道为忙，则在所述第一个SSB的OFDM符号内对所述至少两个SSB中的第二个SSB的传输方向进行侦听；
第三侦听单元，用于在侦听到所述第一个SSB的传输方向的信道为闲时，在所述第一个SSB的OFDM符号内传输所述第一个SSB，在所述第二个SSB的OFDM符号内不传输所述第二个SSB；
其中，所述第二个SSB位于所述第一个SSB之后，且所述第二个SSB和所述第一个SSB相邻。
进一步地，所述侦听模块1501，还包括：
第四侦听单元，用于在侦听到所述第一个SSB的传输方向的信道为闲时，则在所述第二个SSB的OFDM符号内对所述至少两个SSB中的第三个SSB的传输方向进行侦听；
其中，所述第三个SSB位于所述第二个SSB之后，且所述第三个SSB和所述第二个SSB相邻。
可选地，所述网络设备不发送网络设备传输的SSB的索引。
进一步地，所述网络设备不发送网络设备传输的SSB的索引采用下列方式中一种实现：
所述网络设备发送的剩余最小系统信息RMSI中不携带所述网络设备传输的SSB的索引；
协议约定中不包含所述网络设备传输的SSB的索引的信息元素IE。
需要说明的是，该网络设备实施例是与上述应用于网络设备侧的信号传输方法相对应的网络设备，上述实施例的所有实现方式均适用于该网络设备实施例中，也能达到与其相同的技术效果。
本公开实施例还提供一种网络设备，包括：存储器、处理器及存储在存储器上并可在处理器上运行的计算机程序，所述计算机程序被所述处理器执行时实现上述的应用于网络设备的信号传输方法实施例中的各个过程，且能达到相同的技术效果，为避免重复，这里不再赘述。
本公开实施例还提供一种计算机可读存储介质，其中，所述计算机可读存储介质上存储有计算机程序，所述计算机程序被处理器执行时实现上述的应用于网络设备的信号传输方法实施例中的各个过程，且能达到相同的技术效果，为避免重复，这里不再赘述。其中，所述的计算机可读存储介质，如只读存储器(Read-Only Memory，ROM)、随机存取存储器(Random Access Memory，RAM)、磁碟或者光盘等。
图16是本公开一实施例的网络设备的结构图，能够实现上述应用于网络设备侧的信号传输方法的细节，并达到相同的效果。如图16所示，网络设备 1600包括：处理器1601、收发机1602、存储器1603和总线接口，其中：
处理器1601，用于读取存储器1603中的程序，执行下列过程：
在非授权频段，在一个同步信号块SSB传输之前，对SSB的传输方向进行信道侦听；
在侦听到信道为空闲时，通过收发机1602传输所述SSB。
在图16中，总线架构可以包括任意数量的互联的总线和桥，具体由处理器1601代表的一个或多个处理器和存储器1603代表的存储器的各种电路链接在一起。总线架构还可以将诸如外围设备、稳压器和功率管理电路等之类的各种其他电路链接在一起，这些都是本领域所公知的，因此，本文不再对其进行进一步描述。总线接口提供接口。收发机1602可以是多个元件，即包括发送机和接收机，提供用于在传输介质上与各种其他装置通信的单元。
处理器1601负责管理总线架构和通常的处理，存储器1603可以存储处理器1601在执行操作时所使用的数据。
可选地，所述处理器1601读取存储器1603中的程序，还用于执行：
对所述SSB的传输方向进行目标时长的信道侦听；
其中，所述目标时长采用以下方式之一：
所述目标时长等于一次空闲信道评估CCA的时长；
根据公式：目标时长＝延时时长+random(0，M)×N，获取所述目标时长；
其中，M为CCA的最大个数，且M为小于127的正整数，N为一次CCA的时长；random(0，M)为0至M之间的随机数。
可选地，所述处理器1601读取存储器1603中的程序，还用于执行：
利用间隔OFDM符号，对SSB的传输方向进行信道侦听；
其中，所述间隔OFDM符号设置于相邻的两个SSB之间。
可选地，当存在连续的至少两个SSB时，所述处理器1601读取存储器1603中的程序，还用于执行：
对所述至少两个SSB中的第一个SSB的传输方向进行侦听；
在侦听到所述第一个SSB的传输方向的信道为忙，则在所述第一个SSB的OFDM符号内对所述至少两个SSB中的第二个SSB的传输方向进行侦听；
在侦听到所述第一个SSB的传输方向的信道为闲时，在所述第一个SSB的OFDM符号内传输所述第一个SSB，在所述第二个SSB的OFDM符号内不传输所述第二个SSB；
其中，所述第二个SSB位于所述第一个SSB之后，且所述第二个SSB和所述第一个SSB相邻。
可选地，所述处理器1601读取存储器1603中的程序，还用于执行：
在侦听到所述第一个SSB的传输方向的信道为闲时，则在所述第二个SSB的OFDM符号内对所述至少两个SSB中的第三个SSB的传输方向进行侦听；
其中，所述第三个SSB位于所述第二个SSB之后，且所述第三个SSB和所述第二个SSB相邻。
进一步地，所述网络设备不发送网络设备传输的SSB的索引。
具体地，所述网络设备不发送网络设备传输的SSB的索引采用下列方式中一种实现：
所述网络设备发送的剩余最小系统信息RMSI中不携带所述网络设备传输的SSB的索引；
协议约定中不包含所述网络设备传输的SSB的索引的信息元素IE。
其中，网络设备可以是全球移动通讯(Global System of Mobile communication，GSM)或码分多址(Code Division Multiple Access，CDMA)中的基站(Base Transceiver Station，BTS)，也可以是宽带码分多址(Wideband Code Division Multiple Access，WCDMA)中的基站(NodeB，NB)，还可以是LTE中的演进型基站(Evolutional Node B，eNB或eNodeB)，或者中继站或接入点，或者未来5G网络中的基站等，在此并不限定。
需要说明的是，在本文中，术语“包括”、“包含”或者其任何其他变体意在涵盖非排他性的包含，从而使得包括一系列要素的过程、方法、物品或者装置不仅包括那些要素，而且还包括没有明确列出的其他要素，或者是还包括为这种过程、方法、物品或者装置所固有的要素。在没有更多限制的情况下，由语句“包括一个……”限定的要素，并不排除在包括该要素的过程、方法、物品或者装置中还存在另外的相同要素。
通过以上的实施方式的描述，本领域的技术人员可以清楚地了解到上述实施例方法可借助软件加必需的通用硬件平台的方式来实现，当然也可以通过硬件，但很多情况下前者是更佳的实施方式。基于这样的理解，本公开的技术方案本质上或者说对相关技术做出贡献的部分可以以软件产品的形式体现出来，该计算机软件产品存储在一个存储介质(如ROM/RAM、磁碟、光盘)中，包括若干指令用以使得一台终端(可以是手机，计算机，服务器，空调器，或者网络设备等)执行本公开各个实施例所述的方法。
以上所述的是本公开的可选实施方式，应当指出对于本技术领域的普通人员来说，在不脱离本公开所述的原理前提下还可以作出若干改进和润饰，这些改进和润饰也在本公开的保护范围内。

Claims (16)

  1. 一种信号传输方法，应用于网络设备，包括：
    在非授权频段，在一个同步信号块SSB传输之前，对SSB的传输方向进行信道侦听；
    在侦听到信道为空闲时，传输所述SSB。
  2. 根据权利要求1所述的信号传输方法，其中，所述对SSB的传输方向进行信道侦听，包括：
    对所述SSB的传输方向进行目标时长的信道侦听；
    其中，所述目标时长采用以下方式之一：
    所述目标时长等于一次空闲信道评估CCA的时长；
    根据公式：目标时长＝延时时长+random(0，M)×N，获取所述目标时长；
    其中，M为CCA的最大个数，且M为小于127的正整数，N为一次CCA的时长；random(0，M)为0至M之间的随机数。
  3. 根据权利要求1所述的信号传输方法，其中，所述对SSB的传输方向进行信道侦听，包括：
    利用间隔OFDM符号，对SSB的传输方向进行信道侦听，其中，所述间隔OFDM符号设置于相邻的两个SSB之间。
  4. 根据权利要求1所述的信号传输方法，其中，当存在连续的至少两个SSB时，所述对SSB的传输方向进行信道侦听，包括：
    对所述至少两个SSB中的第一个SSB的传输方向进行侦听；
    在侦听到所述第一个SSB的传输方向的信道为忙，则在所述第一个SSB的OFDM符号内对所述至少两个SSB中的第二个SSB的传输方向进行侦听；
    在侦听到所述第一个SSB的传输方向的信道为闲时，在所述第一个SSB的OFDM符号内传输所述第一个SSB，在所述第二个SSB的OFDM符号内不传输所述第二个SSB；
    其中，所述第二个SSB位于所述第一个SSB之后，且所述第二个SSB和所述第一个SSB相邻。
  5. 根据权利要求4所述的信号传输方法，其中，所述对SSB的传输方向进行信道侦听，还包括：
    在侦听到所述第一个SSB的传输方向的信道为闲时，则在所述第二个SSB的OFDM符号内对所述至少两个SSB中的第三个SSB的传输方向进行侦听；
    其中，所述第三个SSB位于所述第二个SSB之后，且所述第三个SSB和所述第二个SSB相邻。
  6. 根据权利要求1-5任一项所述的信号传输方法，其中，所述网络设备不发送网络设备传输的SSB的索引。
  7. 根据权利要求6所述的信号传输方法，其中，所述网络设备不发送网络设备传输的SSB的索引采用下列方式中一种实现：
    所述网络设备发送的剩余最小系统信息RMSI中不携带所述网络设备传输的SSB的索引；
    协议约定中不包含所述网络设备传输的SSB的索引的信息元素IE。
  8. 一种网络设备，包括：
    侦听模块，用于在非授权频段，在一个同步信号块SSB传输之前，对SSB的传输方向进行信道侦听；
    传输模块，用于在侦听到信道为空闲时，传输所述SSB。
  9. 根据权利要求8所述的网络设备，其中，所述侦听模块，用于：
    对所述SSB的传输方向进行目标时长的信道侦听；
    其中，所述目标时长采用以下方式之一：
    所述目标时长等于一次空闲信道评估CCA的时长；
    根据公式：目标时长＝延时时长+random(0，M)×N，获取所述目标时长；
    其中，M为CCA的最大个数，且M为小于127的正整数，N为一次CCA的时长；random(0，M)为0至M之间的随机数。
  10. 根据权利要求8所述的网络设备，其中，所述侦听模块，用于：
    利用间隔OFDM符号，对SSB的传输方向进行信道侦听；
    其中，所述间隔OFDM符号设置于相邻的两个SSB之间。
  11. 根据权利要求8所述的网络设备，其中，当存在连续的至少两个SSB时，所述侦听模块，包括：
    第一侦听单元，用于对所述至少两个SSB中的第一个SSB的传输方向进行侦听；
    第二侦听单元，用于在侦听到所述第一个SSB的传输方向的信道为忙，则在所述第一个SSB的OFDM符号内对所述至少两个SSB中的第二个SSB的传输方向进行侦听；
    第三侦听单元，用于在侦听到所述第一个SSB的传输方向的信道为闲时，在所述第一个SSB的OFDM符号内传输所述第一个SSB，在所述第二个SSB的OFDM符号内不传输所述第二个SSB；
    其中，所述第二个SSB位于所述第一个SSB之后，且所述第二个SSB和所述第一个SSB相邻。
  12. 根据权利要求11所述的网络设备，其中，所述侦听模块，还包括：
    第四侦听单元，用于在侦听到所述第一个SSB的传输方向的信道为闲时，则在所述第二个SSB的OFDM符号内对所述至少两个SSB中的第三个SSB的传输方向进行侦听；
    其中，所述第三个SSB位于所述第二个SSB之后，且所述第三个SSB和所述第二个SSB相邻。
  13. 根据权利要求8-12任一项所述的网络设备，其中，所述网络设备不发送网络设备传输的SSB的索引。
  14. 根据权利要求13所述的网络设备，其中，所述网络设备不发送网络设备传输的SSB的索引采用下列方式中一种实现：
    所述网络设备发送的剩余最小系统信息RMSI中不携带所述网络设备传输的SSB的索引；
    协议约定中不包含所述网络设备传输的SSB的索引的信息元素IE。
  15. 一种网络设备，包括：存储器、处理器及存储在存储器上并可在处理器上运行的计算机程序，所述计算机程序被所述处理器执行时实现如权利要求1至7中任一项所述的信号传输方法的步骤。
  16. 一种计算机可读存储介质，存储有计算机程序，所述计算机程序被 处理器执行时实现如权利要求1至7中任一项所述的信号传输方法的步骤。
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UA127949C2 (uk) 2024-02-21
EP3771127B1 (en) 2023-03-01
CN110300459A (zh) 2019-10-01
CN113225834A (zh) 2021-08-06
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US20210022191A1 (en) 2021-01-21
US11665751B2 (en) 2023-05-30

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