WO2019227361A1 - Procédé et dispositif de transmission de bloc d'informations de système (sib) - Google Patents

Procédé et dispositif de transmission de bloc d'informations de système (sib) Download PDF

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Publication number
WO2019227361A1
WO2019227361A1 PCT/CN2018/089101 CN2018089101W WO2019227361A1 WO 2019227361 A1 WO2019227361 A1 WO 2019227361A1 CN 2018089101 W CN2018089101 W CN 2018089101W WO 2019227361 A1 WO2019227361 A1 WO 2019227361A1
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WIPO (PCT)
Prior art keywords
sib
period
time
transmitted
duration
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PCT/CN2018/089101
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English (en)
Chinese (zh)
Inventor
韩金侠
李振宇
南杨
李铮
张武荣
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华为技术有限公司
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Priority to CN201880094029.7A priority Critical patent/CN112586030B/zh
Priority to PCT/CN2018/089101 priority patent/WO2019227361A1/fr
Publication of WO2019227361A1 publication Critical patent/WO2019227361A1/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W28/00—Network traffic management; Network resource management
    • H04W28/02—Traffic management, e.g. flow control or congestion control
    • H04W28/04—Error control
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
    • Y02D30/00—Reducing energy consumption in communication networks
    • Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks

Definitions

  • the present application relates to the field of communications, and in particular, to a method and device for transmitting a system information block SIB.
  • Narrowband Internet of Things technology is an emerging technology in the field of Internet of Things. It supports the cellular data connection of low-power devices in the WAN. It has wide coverage, multiple connections, fast speed, low cost, and high performance. Low power consumption and excellent architecture.
  • the narrowband Internet of Things can also be called low-power wide-area network (LPWAN).
  • LPWAN low-power wide-area network
  • MFA MulteFire Alliance
  • MFA has proposed a narrowband Internet of Things (NB-IoT-U) technology based on unlicensed spectrum.
  • NB-IoT-U has the technical characteristics of NB-IoT, but in order to adapt to unlicensed spectrum regulations (for example, spectrum regulations of the Federal Communications Commission (FCC) and European Telecommunications Standards Institute (ETSI)) Spectrum regulations), based on the NB-IoT frame structure, made some modifications to adapt to unlicensed spectrum regulations.
  • unlicensed spectrum regulations for example, spectrum regulations of the Federal Communications Commission (FCC) and European Telecommunications Standards Institute (ETSI)
  • FCC Federal Communications Commission
  • ETSI European Telecommunications Standards Institute
  • one frame structure of NB-IoT-U is that both uplink and downlink comply with frequency hopping regulations
  • another possible frame structure is that uplink meets frequency hopping regulations and downlink meet Digital modulation regulations.
  • the third possible frame structure is that the uplink conforms to the frequency hopping regulations, and the downward behavior is a mixed mode, that is, the primary fixed channel part (or primary fixed segment) complies with the digital modulation regulations.
  • the data channel Partially (or data segments) comply with frequency hopping regulations.
  • the frame structure of NB-IoT-U is a frame structure that meets the requirements of the duty cycle.
  • FIG. 1 is a schematic structural diagram of sending a system information block (system information block) in an NB-IoT-U system provided in the prior art.
  • system information block system information block
  • the SIB is sent at a predetermined number of consecutive valid downlink subframes in a fixed channel period. If the SIB period includes two fixed channel periods, the SIB is concentrated to be transmitted in one fixed channel period, and no SIB is transmitted in the other fixed channel period.
  • the terminal device finishes receiving the master information block (master information block, MIB) within a fixed channel period without SIB transmission, it needs to wait for another fixed channel period to receive the SIB. Therefore, the delay of the initial access of the cell by the terminal device is increased.
  • master information block master information block
  • the embodiments of the present application provide a SIB transmission method and device, which can effectively reduce the delay of a terminal device accessing a network.
  • an SIB transmission method including: repeatedly sending N SIBs in a first period in the time domain, and the first period includes m second periods. It is understandable that the first The second cycle duration is m times the cycle duration, N is a positive integer greater than 0, and m is a positive integer greater than 0. When N is greater than or equal to m, the number of repetitions of the SIB in each second period from the first second period to the m-1th second period in m second periods is The number of repetitions of the SIB in the m second period of the m second periods is Rounds up.
  • the sending entity that sends the SIB may be a base station or a chip of the base station.
  • the receiving entity receiving the SIB may be a terminal device or a chip of the terminal device.
  • N SIBs repeatedly sent in the first cycle in the time domain are dispersedly distributed in the second cycle, so that the terminal device does not need to wait for a second cycle before receiving the SIB, thereby reducing The delay of the terminal device's initial access to the cell is achieved.
  • the SIBs that need to be sent in each second period from the first second period to the m-1th second period in the m second periods can be sent through the following specific implementation methods:
  • the first implementation manner is that each of the m second period to the m-1 second period to the second Secondary SIBs can be sent at regular intervals. Secondary SIB occupation Time units, and each time the SIB is sent, one time unit is used. Duration of time unit is T2 represents the duration of the second cycle. Alternatively, the duration of the time unit may be 160 milliseconds.
  • the second achievable manner is that each of the m second period to the m-1 second period to each second period sent in the second period Secondary SIB occupation Time units, Each time unit is transmitted continuously, and each transmitted SIB occupies one time unit.
  • the duration of the time unit can also be 160 milliseconds.
  • each transmitted SIB occupies consecutive p downlink subframes, and p is a positive integer greater than 0.
  • each transmitted SIB occupies 8 consecutive downlink subframes.
  • each successively transmitted SIB occupies 4 consecutive downlink subframes.
  • the SIBs that need to be sent in the m second period of the m second periods can be sent in the following specific implementation manners:
  • the first implementable manner is that in the m second period, the Secondary SIBs can be sent at regular intervals. Secondary SIB occupation Time units, and each time the SIB is sent, one time unit is used. Duration of time unit is T2 represents the duration of the second cycle. Alternatively, the duration of the time unit may be 160 milliseconds.
  • the second achievable manner the m sent in the m second period of the second period Secondary SIB occupation Time units, Each time unit is transmitted continuously, and each transmitted SIB occupies one time unit.
  • the duration of the time unit can also be 160 milliseconds.
  • each transmitted SIB occupies consecutive p downlink subframes, and p is a positive integer greater than 0.
  • each transmitted SIB occupies 8 consecutive downlink subframes.
  • each successively transmitted SIB occupies 4 consecutive downlink subframes.
  • N is a positive integer and N is an integer power of 2; m is a positive integer and m is an integer power of 2; The number of repetitions of the SIB in each of the second cycles is N / m.
  • SIBs that need to be sent in each of the m second cycles can be sent in the following specific implementations:
  • N / m SIBs sent in each second period occupy N / m time units.
  • the SIB takes one time unit.
  • the duration of the time unit is T2 * m / N, and T2 represents the duration of the second cycle.
  • the duration of the time unit is 160 milliseconds.
  • N / m times of SIBs transmitted in each second cycle occupy N / m time units, N / m time units are transmitted continuously, and each transmitted SIB occupies one time unit.
  • the duration of the time unit is 160 milliseconds.
  • each transmitted SIB occupies consecutive p downlink subframes, and p is a positive integer greater than 0.
  • each transmitted SIB occupies 8 consecutive downlink subframes.
  • each successively transmitted SIB occupies 4 consecutive downlink subframes.
  • N / m SIBs are transmitted continuously in each second cycle, the N / m transmitted SIBs occupy consecutive N * p / m downlink subframes, and p is a single SIB transmission and occupies downlinks.
  • the number of subframes, for example, p 8.
  • N SIBs repeatedly sent in the first period in the time domain are evenly distributed in the second period, so that the terminal device does not need to wait for a second period to receive the SIB, thereby reducing the terminal device's initial cell access. Delay.
  • the start time of sending the SIB for the first time in each second period is the time of the second period to which the first sent SIB belongs. The time at which the start time starts to shift from the preset offset value.
  • the duration of the time unit is T2 * m / N or 160ms.
  • the start of sending the SIB in each time unit The start time is the time offset from the start time of the time unit by a preset offset value.
  • the time unit duration is 160ms.
  • the start time of sending the SIB in each time unit is the slave time unit. The time at which the start time of the offset starts to shift from the preset offset value.
  • the preset offset value may be pre-configured; or, the preset offset value is carried through the MIB.
  • the preset offset value can be 40 milliseconds.
  • the preset offset value may also be considered as a duration that does not include the duration of the primary fixed channel.
  • the start time of sending the SIB for the first time in each second cycle is the time offset from the start time of the second cycle to which the first transmitted SIB belongs, and the time length of the primary fixed channel and the preset offset value.
  • the start time of sending the SIB in each time unit is the time from the start time of the time unit to the main fixed channel duration and the preset offset value.
  • the preset offset value may be a duration pre-configured by the base station device or a data channel duration, for example, the preset offset value is 20 milliseconds.
  • the data channel may also be referred to as a data segment.
  • the number of SIB transmissions in each second cycle of the first N second cycles is 1, and in each second cycle of the next mN second cycles The number of SIB transmissions is zero.
  • an SIB transmission method including: receiving N SIBs in a first period in the time domain, and the first period includes m second periods. It is understandable that the first period The duration of the second period is m times, N is a positive integer greater than 0, and m is a positive integer greater than 0. When N is greater than or equal to m, the number of repetitions of the SIB in each second period from the first second period to the m-1th second period in m second periods is The number of repetitions of the SIB in the m second period of the m second periods is Rounds up.
  • the sending entity that sends the SIB may be a base station or a chip of the base station.
  • the receiving entity receiving the SIB may be a terminal device or a chip of the terminal device.
  • N SIBs repeatedly sent in the first cycle in the time domain are dispersedly distributed in the second cycle, so that the terminal device does not need to wait for a second cycle before receiving the SIB, thereby reducing The delay of the terminal device's initial access to the cell is achieved.
  • the SIBs that need to be sent in each second period from the first second period to the m-1th second period in the m second periods can be sent through the following specific implementation methods:
  • the first implementation manner is that each of the m second period to the m-1 second period to the second Secondary SIBs can be sent at regular intervals. Secondary SIB occupation Time units, and each time the SIB is sent, one time unit is used. Duration of time unit is T2 represents the duration of the second cycle. Alternatively, the duration of the time unit may be 160 milliseconds.
  • the second achievable manner is that each of the m second period to the m-1 second period to each second period sent in the second period Secondary SIB occupation Time units, Each time unit is transmitted continuously, and each transmitted SIB occupies one time unit.
  • the duration of the time unit can also be 160 milliseconds.
  • each transmitted SIB occupies consecutive p downlink subframes, and p is a positive integer greater than 0.
  • each transmitted SIB occupies 8 consecutive downlink subframes.
  • each successively transmitted SIB occupies 4 consecutive downlink subframes.
  • the SIBs that need to be sent in the m second period of the m second periods can be sent in the following specific implementation manners:
  • the first implementable manner is that in the m second period, the Secondary SIBs can be sent at regular intervals. Secondary SIB occupation Time units, and each time the SIB is sent, one time unit is used. Duration of time unit is T2 represents the duration of the second cycle. Alternatively, the duration of the time unit may be 160 milliseconds.
  • the second achievable manner the m sent in the m second period of the second period Secondary SIB occupation Time units, Each time unit is transmitted continuously, and each transmitted SIB occupies one time unit.
  • the duration of the time unit can also be 160 milliseconds.
  • each transmitted SIB occupies consecutive p downlink subframes, and p is a positive integer greater than 0.
  • each transmitted SIB occupies 8 consecutive downlink subframes.
  • each successively transmitted SIB occupies 4 consecutive downlink subframes.
  • N is a positive integer and N is an integer power of 2
  • m is a positive integer and m is an integer power of 2
  • N is greater than or equal to m
  • m The number of repetitions of the SIB in each of the second cycles is N / m.
  • SIBs that need to be sent in each of the m second cycles can be sent in the following specific implementations:
  • N / m SIBs sent in each second period occupy N / m time units.
  • the SIB takes one time unit.
  • the duration of the time unit is T2 * m / N, and T2 represents the duration of the second cycle.
  • the duration of the time unit is 160 milliseconds.
  • N / m times of SIBs transmitted in each second cycle occupy N / m time units, N / m time units are transmitted continuously, and each transmitted SIB occupies one time unit.
  • the duration of the time unit is 160 milliseconds.
  • each transmitted SIB occupies consecutive p downlink subframes, and p is a positive integer greater than 0.
  • each transmitted SIB occupies 8 consecutive downlink subframes.
  • each successively transmitted SIB occupies 4 consecutive downlink subframes.
  • N / m SIBs are transmitted continuously in each second cycle, the N / m transmitted SIBs occupy consecutive N * p / m downlink subframes, and p is a single SIB transmission and occupies downlinks.
  • the number of subframes, for example, p 8.
  • N SIBs repeatedly sent in the first period in the time domain are evenly distributed in the second period, so that the terminal device does not need to wait for a second period to receive the SIB, thereby reducing the terminal device's initial cell access. Delay.
  • the start time of sending the SIB for the first time in each second period is the time of the second period to which the first sent SIB belongs. The time at which the start time starts to shift from the preset offset value.
  • the duration of the time unit is T2 * m / N or 160ms.
  • the start of sending the SIB in each time unit The start time is the time offset from the start time of the time unit by a preset offset value.
  • the time unit duration is 160ms.
  • the start time of sending the SIB in each time unit is the slave time unit. The time at which the start time of the offset starts to shift from the preset offset value.
  • the preset offset value may be pre-configured; or, the preset offset value is carried through the MIB.
  • the preset offset value can be 40 milliseconds.
  • the preset offset value may also be considered as a duration that does not include the duration of the primary fixed channel.
  • the start time of sending the SIB for the first time in each second cycle is the time offset from the start time of the second cycle to which the first transmitted SIB belongs, and the time length of the primary fixed channel and the preset offset value.
  • the start time of sending the SIB in each time unit is the time from the start time of the time unit to the main fixed channel duration and the preset offset value.
  • the preset offset value may be a duration pre-configured by the base station device or a data channel duration, for example, the preset offset value is 20 milliseconds.
  • the number of SIB transmissions in each second cycle of the first N second cycles is 1, and in each second cycle of the next mN second cycles The number of SIB transmissions is zero.
  • a wireless communication device is provided.
  • the wireless communication device is a base station or a chip of a base station.
  • the wireless communication device includes a sending unit, where the sending unit is configured to be a first unit in the time domain.
  • the SIB is repeatedly sent N times.
  • the first cycle includes m second cycles. It can be understood that the duration of the first cycle is m times the duration of the second cycle, N is a positive integer greater than 0, and m is a positive integer greater than 0. Integer.
  • the number of repetitions of the SIB in each second period from the first second period to the m-1th second period in m second periods is The number of repetitions of the SIB in the m second period of the m second periods is Rounds up.
  • a wireless communication device is provided.
  • the wireless communication device is a terminal device or a chip of a terminal device.
  • the wireless communication device includes a receiving unit, where the receiving unit is configured to In the first cycle, N SIBs are received.
  • the first cycle includes m second cycles. It can be understood that the length of the first cycle is m times the length of the second cycle. N is a positive integer greater than 0 and m is greater than 0. Positive integer.
  • N is greater than or equal to m
  • the number of repetitions of the SIB in each second period from the first second period to the m-1th second period in m second periods is The number of repetitions of the SIB in the m second period of the m second periods is Rounds up.
  • the sending entity that sends the SIB may be a base station or a chip of the base station.
  • the receiving entity receiving the SIB may be a terminal device or a chip of the terminal device.
  • N SIBs repeatedly sent in the first cycle in the time domain are dispersedly distributed in the second cycle, so that the terminal device does not need to wait for a second cycle before receiving the SIB, thereby reducing The delay of the terminal device's initial access to the cell is achieved.
  • the SIBs that need to be sent in each second period from the first second period to the m-1th second period in the m second periods can be implemented by the following specific implementation send:
  • the first implementation manner is that each of the m second period to the m-1 second period to the second Secondary SIBs can be sent at regular intervals. Secondary SIB occupation Time units, and each time the SIB is sent, one time unit is used. Duration of time unit is T2 represents the duration of the second cycle. Alternatively, the duration of the time unit may be 160 milliseconds.
  • the second achievable manner is that each of the m second period to the m-1 second period to each second period sent in the second period Secondary SIB occupation Time units, Each time unit is transmitted continuously, and each transmitted SIB occupies one time unit.
  • the duration of the time unit can also be 160 milliseconds.
  • each transmitted SIB occupies consecutive p downlink subframes, and p is a positive integer greater than 0.
  • each transmitted SIB occupies 8 consecutive downlink subframes.
  • each successively transmitted SIB occupies 4 consecutive downlink subframes.
  • the SIBs that need to be sent in the m second period of the m second periods can be sent in the following specific implementation manners:
  • the first implementable manner is that in the m second period, the Secondary SIBs can be sent at regular intervals. Secondary SIB occupation Time units, and each time the SIB is sent, one time unit is used. Duration of time unit is T2 represents the duration of the second cycle. Alternatively, the duration of the time unit may be 160 milliseconds.
  • the second achievable manner the m sent in the m second period of the second period Secondary SIB occupation Time units, Each time unit is transmitted continuously, and each transmitted SIB occupies one time unit.
  • the duration of the time unit can also be 160 milliseconds.
  • each transmitted SIB occupies consecutive p downlink subframes, and p is a positive integer greater than 0.
  • each transmitted SIB occupies 8 consecutive downlink subframes.
  • each successively transmitted SIB occupies 4 consecutive downlink subframes.
  • N is a positive integer and N is an integer power of 2
  • m is a positive integer and m is an integer power of 2
  • N is greater than or equal to m
  • m The number of repetitions of the SIB in each of the second cycles is N / m.
  • SIBs that need to be sent in each of the m second cycles can be sent in the following specific implementations:
  • N / m SIBs sent in each second period occupy N / m time units.
  • the SIB takes one time unit.
  • the duration of the time unit is T2 * m / N, and T2 represents the duration of the second cycle.
  • the duration of the time unit is 160 milliseconds.
  • N / m times of SIBs transmitted in each second cycle occupy N / m time units, N / m time units are transmitted continuously, and each transmitted SIB occupies one time unit.
  • the duration of the time unit is 160 milliseconds.
  • each transmitted SIB occupies consecutive p downlink subframes, and p is a positive integer greater than 0.
  • each transmitted SIB occupies 8 consecutive downlink subframes.
  • each successively transmitted SIB occupies 4 consecutive downlink subframes.
  • N / m SIBs are transmitted continuously in each second cycle, the N / m transmitted SIBs occupy consecutive N * p / m downlink subframes, and p is a single SIB transmission and occupies downlinks.
  • the number of subframes, for example, p 8.
  • N SIBs repeatedly sent in the first period in the time domain are evenly distributed in the second period, so that the terminal device does not need to wait for a second period to receive the SIB, thereby reducing the terminal device's initial cell access. Delay.
  • the start time of sending the SIB for the first time in each second period is the time of the second period to which the first sent SIB belongs. The time at which the start time starts to shift from the preset offset value.
  • the duration of the time unit is T2 * m / N or 160ms.
  • the start of sending the SIB in each time unit The start time is the time offset from the start time of the time unit by a preset offset value.
  • the time unit duration is 160ms.
  • the start time of sending the SIB in each time unit is the slave time unit. The time at which the start time of the offset starts to shift from the preset offset value.
  • the preset offset value may be pre-configured; or, the preset offset value is carried through the MIB.
  • the preset offset value can be 40 milliseconds.
  • the preset offset value may also be considered as a duration that does not include the duration of the primary fixed channel.
  • the start time of sending the SIB for the first time in each second cycle is the time offset from the start time of the second cycle to which the first transmitted SIB belongs, and the time length of the primary fixed channel and the preset offset value.
  • the start time of sending the SIB in each time unit is the time from the start time of the time unit to the main fixed channel duration and the preset offset value.
  • the preset offset value may be a duration pre-configured by the base station device or a data channel duration, for example, the preset offset value is 20 milliseconds.
  • the number of SIB transmissions in each second cycle of the first N second cycles is 1, and in each second cycle of the next mN second cycles The number of SIB transmissions is zero.
  • the functional modules of the third aspect and the fourth aspect may be implemented by hardware, and may also be implemented by hardware executing corresponding software.
  • the hardware or software includes one or more modules corresponding to the above functions.
  • the transceiver is used to complete the functions of the receiving unit and the sending unit
  • the processor is used to complete the functions of the processing unit
  • the memory is used to store the program instructions of the processor for processing the SIB transmission method in the embodiment of the present application.
  • the processor, the transceiver, and the memory are connected and communicate with each other through a bus.
  • an embodiment of the present application provides a device, including: a processor, a memory, a bus, and a transceiver; the memory is used to store a computer to execute instructions, the processor is connected to the memory through the bus, and when the processor runs When the processor executes the computer execution instructions stored in the memory, so that the device executes the method according to any aspect described above.
  • the transceiver when the device is a base station, the transceiver is used to complete a function of a transmitting unit.
  • the transceiver is used to complete the function of the receiving unit.
  • an embodiment of the present application provides a computer-readable storage medium for storing computer software instructions used by the foregoing device, and when the computer software instruction is run on the computer, the computer can execute the method in any of the foregoing aspects.
  • an embodiment of the present application provides a computer program product containing instructions, which when executed on a computer, enables the computer to execute the method in any of the foregoing aspects.
  • the names of the base station, the terminal device, and the wireless communication device do not limit the device itself. In actual implementation, these devices may appear under other names. As long as the functions of each device are similar to the embodiments of the present application, they fall into the scope of the claims of the present application and their equivalent technologies.
  • FIG. 1 is a schematic structural diagram of sending an SIB in an NB-IoT-U system provided in the prior art
  • FIG. 2 is a simplified schematic diagram of a passing system according to an embodiment of the present application.
  • FIG. 3 is a flowchart of a SIB transmission method according to an embodiment of the present application.
  • FIG. 4 is a schematic structural diagram of sending an SIB according to an embodiment of the present application.
  • FIG. 5 is a schematic structural diagram of another SIB sending method according to an embodiment of the present application.
  • FIG. 6 is a schematic structural diagram of still another SIB transmission according to an embodiment of the present application.
  • FIG. 7 is a schematic structural diagram of sending a SIB including a secondary fixed channel provided in the prior art
  • FIG. 8 is a schematic structural diagram of sending an SIB including a secondary fixed channel according to an embodiment of the present application.
  • FIG. 9 is a schematic structural diagram of still another SIB transmission according to an embodiment of the present application.
  • FIG. 10 is a schematic structural diagram of still another SIB transmission according to an embodiment of the present application.
  • FIG. 11 is a schematic structural diagram of still another SIB transmission according to an embodiment of the present application.
  • FIG. 12 is a schematic structural diagram of still another SIB transmission according to an embodiment of the present application.
  • FIG. 13 is a schematic structural diagram of still another SIB transmission according to an embodiment of the present application.
  • FIG. 14 is a schematic structural diagram of still another SIB transmission according to an embodiment of the present application.
  • 15 is a schematic structural diagram of still another SIB transmission according to an embodiment of the present application.
  • 16 is a schematic structural diagram of still another SIB transmission according to an embodiment of the present application.
  • 17 is a schematic structural diagram of still another SIB transmission according to an embodiment of the present application.
  • FIG. 19 is a schematic structural diagram of still another SIB transmission according to an embodiment of the present application.
  • 20 is a schematic structural diagram of still another SIB transmission according to an embodiment of the present application.
  • 21 is a flowchart of another SIB transmission method according to an embodiment of the present application.
  • 22 is a schematic diagram of a frame structure of an NB-IoT-U provided by an embodiment of the present application.
  • FIG. 23 is a schematic diagram of a frame structure of another NB-IoT-U according to an embodiment of the present application.
  • FIG. 24 is a schematic diagram of a frame structure of still another NB-IoT-U according to an embodiment of the present application.
  • FIG. 25 is a schematic structural diagram of a base station according to an embodiment of the present application.
  • FIG. 26 is a schematic structural diagram of a device according to an embodiment of the present application.
  • FIG. 27 is a schematic structural diagram of another base station according to an embodiment of the present application.
  • FIG. 28 is a schematic structural diagram of a base station according to an embodiment of the present application.
  • FIG. 29 is a schematic structural diagram of another base station according to an embodiment of the present application.
  • FIG. 2 shows a simplified schematic diagram of a communication system to which embodiments of the present application can be applied.
  • the communication system may include: a base station 201 and a terminal device 202.
  • the base station 201 may be a base station (BS) or a base station controller for wireless communication. Specifically, the base station may include a user plane base station and a control plane base station.
  • a base station is a device that is deployed in a wireless access network to provide wireless communication functions for the terminal device 202. Its main functions are: management of wireless resources, compression of Internet protocol (IP) headers, and user data flow. Encryption, selection of mobile management entity (MME) when user equipment is attached, routing user plane data to service gateway (SGW), organization and transmission of paging messages, organization and transmission of broadcast messages, Configuration of measurements and measurement reports for mobility or scheduling purposes, etc.
  • the base station 201 may include various forms of macro base stations, micro base stations, relay stations, access points, and the like.
  • the names of equipment with base station functions may be different.
  • LTE networks they are called evolved base stations (evolved NodeB, eNB, or eNodeB).
  • eNB evolved base stations
  • eNodeB evolved base stations
  • a base station Node B
  • gNB next generation base station
  • the base station 201 may be another device that provides a wireless communication function for the terminal device 202.
  • a base station a device that provides a wireless communication function for the terminal device 202 is referred to as a base station.
  • the terminal device 202 may also be called a terminal, a user equipment (UE), a mobile station (MS), a mobile terminal (MT), or the like.
  • the terminal device can be a mobile phone, a tablet, a computer with a wireless transceiver function, a virtual reality (VR) terminal device, an augmented reality (AR) terminal device, an industrial control (industrial control) ), Wireless terminals in self-driving, wireless terminals in remote surgery, wireless terminals in smart grid, wireless terminals in transportation safety Terminals, wireless terminals in smart cities, wireless terminals in smart homes, and so on.
  • the embodiment of the present application does not limit the specific technology and specific device form adopted by the terminal device.
  • the terminal device 202 may also be a relay (Relay) and a base station that can perform data communication can be used as a terminal device.
  • the terminal device 202 is used as a user equipment in a general sense as an example.
  • the communication system provided in the embodiments of the present application may refer to an unauthorized wireless communication system restricted by spectrum regulations.
  • the NB-IoT-U system may refer to an unauthorized wireless communication system restricted by spectrum regulations.
  • the SIB transmission method described in the embodiments of the present application is applicable to spectrum regulations below 1 GHz.
  • the FCC's spectrum regulations impose the following restrictions on devices using the 902MHZ-928MHz band.
  • the 6dB channel bandwidth (bandwidth / each channel) must not be less than 500kHz, the PSD must not be greater than 8dBm / 3kHz, and the transmit power (or conductive power) not greater than 30dBm, which is equivalent Isotropic radiated power (EIRP) is limited to not more than 36 dBm.
  • EIRP Isotropic radiated power
  • FHSS frequency hopping spread spectrum
  • the 20dB channel bandwidth is less than 250kHz, at least 50 frequency hopping channels are supported, and the average occupation time of each channel (average time of occupation) is not greater than 0.4s / 20s, that is, the average occupation time of each channel within 20 seconds No more than 0.4 seconds, and EIRP is no more than 36dBm; if the channel bandwidth is between 250kHz and 500kHz, at least 25 frequency hopping channels are supported, and the average occupation time (average time of each channel) of each channel is not greater than 0.4s / 10s and other restrictions.
  • ETSI imposes the following restrictions on devices using unlicensed frequency bands below 1GHz.
  • the equivalent radiated power (or effective radiated power) (ERP) is 27dBm at the maximum, and the duty cycle is 10% at the maximum within one hour.
  • ERP effective radiated power
  • the equivalent radiated power is 27dBm at the maximum and 1 hour Within the network access point, the maximum duty cycle is 10%, otherwise the duty cycle is 2.5%.
  • words such as “exemplary” or “such as” are used as an example, illustration, or description. Any embodiment or design described as “example” or “such as” in the embodiments of the present application should not be construed as more preferred or more advantageous than other embodiments or designs. Rather, the words “exemplary” or “such as” are used to present concepts in a concrete manner.
  • the network architecture and service scenarios described in the embodiments of the present application are intended to more clearly illustrate the technical solutions of the embodiments of the present application, and do not constitute a limitation on the technical solutions provided by the embodiments of the present application. Those skilled in the art can know that with the network The evolution of the architecture and the emergence of new business scenarios. The technical solutions provided in the embodiments of the present application are also applicable to similar technical issues.
  • connection in the present application means that they can communicate with each other, and specifically, they can be connected in a wired manner or wirelessly, which is not specifically limited in the embodiments of the present application.
  • the devices connected to each other may be directly connected or may be connected through other devices, which is not specifically limited in the embodiment of the present application.
  • the SIB transmission format in the NB-IoT-U system is: starting from a fixed channel period as the boundary. After the synchronization signal and MIB, or synchronization signal, MIB, and other broadcast information are sent, the SIB The number of SIB repetitions in the SIB cycle is concentrated to send all SIBs in a fixed channel period, and all SIBs occupy consecutive effective downlink subframes.
  • the so-called effective downlink subframe is a downlink subframe that can be used for transmitting SIB. If the SIB period includes two fixed channel periods, the SIB is concentrated to be transmitted in one fixed channel period, and no SIB is transmitted in the other fixed channel period. In this case, if the terminal device completes MIB reception within a fixed channel period without SIB transmission, it needs to wait for another fixed channel period to receive SIB. Therefore, the delay of the initial access of the cell by the terminal device is increased.
  • the embodiment of the present application provides a SIB transmission method.
  • the basic principle is: In the first period in the time domain, the SIB is repeatedly transmitted N times.
  • the first period includes m second periods. It is understandable that the duration of the first period is The duration of the second period is m times, N is a positive integer greater than 0, and m is a positive integer greater than 0.
  • N is greater than or equal to m
  • the number of repetitions of the SIB in each second period from the first second period to the m-1th second period in m second periods is The number of repetitions of the SIB in the m second period of the m second periods is Rounds up.
  • the sending entity that sends the SIB may be a base station or a chip of the base station.
  • the receiving entity receiving the SIB may be a terminal device or a chip of the terminal device.
  • N SIBs repeatedly sent in the first cycle in the time domain are dispersedly distributed in the second cycle, so that the terminal device does not need to wait for a second cycle before receiving the SIB, thereby reducing The delay of the terminal device's initial access to the cell is achieved.
  • the embodiment of the present application assumes that the sending entity is a base station and the receiving entity is a terminal device.
  • the communication between the base station and the terminal device is taken as an example for description.
  • FIG. 3 is a flowchart of a SIB transmission method according to an embodiment of the present application. As shown in FIG. 3, the method may include:
  • the base station repeatedly sends the SIB N times in the first cycle in the time domain.
  • the first period includes m second periods.
  • the first cycle can be understood as the cycle of sending the SIB.
  • the second period can be understood as the (main) fixed channel period.
  • the (main) fixed channel period may also be referred to as a MIB period, a PBCH period, or a (main) discovery reference signal (DRS) period.
  • the so-called main fixed channel can be understood as a fixed frequency of sending synchronization signals and MIBs, or messages such as synchronization signals, MIBs, and other broadcast information.
  • the main fixed channel can also be called a common channel.
  • base stations In order to reduce the delay in the initial access of terminal equipment, base stations usually first send synchronization signals and MIBs, or synchronization signals, MIBs, and other broadcast information, at a fixed frequency point that is predetermined. After waiting for the message, after sending the synchronization signal and MIB, or the synchronization signal, MIB, and other broadcast information, the SIB is sent to the terminal device in a time division multiplexed manner on the data channel.
  • the synchronization signal and MIB, or the synchronization signal, MIB, and other broadcast information are sent on the fixed channel, so that the terminal device searches for the synchronization signal during blind detection, and then receives the MIB information and other broadcast information, and then receives the SIB and executes Random access and other processes.
  • the SIBs described in the embodiments of the present application include SIB1 to SIB7.
  • the synchronization signals include a primary synchronization signal (PSS) and a secondary synchronization signal (SSS).
  • PSS primary synchronization signal
  • SSS secondary synchronization signal
  • the MIB is transmitted through a physical downlink broadcast channel (PBCH).
  • PBCH physical downlink broadcast channel
  • Other broadcast information includes, but is not limited to, other SIBs that do not use the SIB transmission scheme described in the embodiments of the present application.
  • the frequency domain resources and time domain resources occupied by the fixed channel and the data channel described in the embodiments of the present application are unlicensed spectrum resources.
  • the fixed channel duration may include an uplink portion, which is not limited in the embodiment of the present application.
  • the first period includes m second periods, which can be understood as the second period having a length of m times the first period.
  • T1 the duration of the first cycle
  • T2 the duration of the second cycle
  • T1 m * T2.
  • the time unit of T1 and the time unit of T2 can be 1 millisecond (millisecond, ms), or 10ms, respectively. In the embodiments of the present application, 1 millisecond is taken as an example for description.
  • the number of SIB repetitions in each second period from the first second period to the m-1th second period in m second periods is The number of SIB repetitions in the m second period in the m second periods is among them, Rounds up.
  • the round-up symbol is omitted by default, that is, the calculation result of the default N / m is an integer.
  • N is an integer power of 2
  • m can be equal to 1, 2, 4, or 8.
  • N is an integer power of 2.
  • N can be equal to 1, 2, 4, 8, or 16.
  • the number of repetitions of the SIB in each of the m second periods may be N / m.
  • the method of sending the SIB in the second cycle is described by taking the calculation result of N / m as an integer as an example.
  • the N SIBs are uniformly distributed in m second periods, that is, the number of repetitions of the SIB in each second period of the m second periods is N / m.
  • the first period includes two second periods, and the SIB is sent once in each second period in the first period.
  • the first cycle includes two second cycles, and the SIB is transmitted eight times in each second cycle in the first cycle.
  • the number of SIB repetitions in each second cycle in the first N second cycles is 1, and The number of repetitions is 0.
  • the first cycle includes 2 second cycles
  • the SIB is sent once in the first second cycle in the first cycle
  • the second No SIB is sent for two cycles.
  • the first cycle includes 4 second cycles
  • the SIB is sent once in the first second cycle and the second second cycle in the first cycle, and in the first cycle
  • the SIB is not transmitted during the third second period and the fourth second period.
  • repeatedly sending the SIBs N times in the embodiment of the present application includes sending the SIBs for the first time. It can be understood that the SIB is repeatedly sent N times in the first cycle in the time domain, that is, the SIB is sent N times in the first cycle in the time domain, and the content of the SIB sent each time is the same.
  • the following describes in detail a sending manner in which the SIB is repeatedly sent N / m times in each second cycle.
  • N / m times of SIBs are sent at equal intervals in each second cycle. In combination with the above N times of SIBs, they are evenly distributed in m second cycles. Understandably, N times of SIBs are sent at the first Send at regular intervals throughout the week.
  • the SIB transmitted each time in each second cycle may be considered to occupy one time unit, and the N / m SIBs transmitted in each second cycle may occupy N / m time units. Furthermore, the N / m time units may be uniformly distributed in each second period, that is, the N / m time units are sent at equal intervals.
  • each transmitted SIB occupies consecutive downlink subframes. For example, each transmitted SIB can occupy 8 consecutive downlink subframes. Or, in each time unit, each transmitted SIB may occupy 4 consecutive downlink subframes.
  • time unit can be understood as a time unit for sending the SIB once.
  • the embodiment of the present application does not limit the name of the time unit for sending the SIB once.
  • a time unit may also be referred to as a time unit block, a time unit window, a transmission block, or a transmission window.
  • the duration of each time unit in the N / m time units can be determined according to the duration of the first cycle, the duration of the second cycle, and the number of repetitions of the SIB. Depending on the duration of the first cycle, the duration of the second cycle, and the number of repetitions of the SIB, the duration of the time unit may also be different.
  • the duration of the time unit of the SIB transmitted each time is T3.
  • the time unit of T3 can be 1ms or 10ms.
  • the first period includes two second periods.
  • the repetitive times of the SIB are 16, 8, 4, 2, and 1, respectively.
  • each second cycle contains 8 time units, and 8 time units Uniformly distributed in every second cycle.
  • each second cycle contains 4 time units, and 4 time units are in Uniformly distributed in every second cycle.
  • each second cycle contains 2 time units, and 2 time units Uniformly distributed in every second cycle.
  • each second cycle includes one time unit.
  • duration of the foregoing time unit is only a schematic description, and the specific duration of the time unit may not be limited in the embodiment of the present application.
  • duration of the time unit described in the embodiments of the present application may also be multiplexed with the definition in the NB-IoT system.
  • the duration of the time unit may be considered to be 160 ms regardless of the number of repetitions of the SIB.
  • the duration of the time unit may be determined according to the number of data channels occupied by the SIB when sending the SIB and the channel duration of each data channel.
  • the duration of the time unit is 80 ms. If the current SIB transmission occupies 2 data channels, the duration of the time unit is 40ms. It can be understood that the duration of the time unit described in the embodiment of the present application includes the sending duration of sending the SIB.
  • the start transmission time of the SIB in the time unit transmitted for the first time in the second cycle needs to be offset from the primary fixed channel duration.
  • the terminal equipment in the NB-IoT-U system is a low-cost terminal and the processing capability of the terminal equipment is limited, the terminal equipment needs time to process the MIB after receiving the MIB (or the synchronization signal, or the synchronization signal and other broadcast information). (Or synchronization signals, or synchronization signals and other broadcast information), SIBs cannot be received immediately. Therefore, in order to ensure the complete reception of each SIB in the second period, the delay of the terminal device receiving the SIB is reduced.
  • the start time of the first SIB transmission in the first time unit in the second cycle needs to be offset by a period of time relative to the end time of the primary fixed channel, that is, in the first time unit in the second cycle, the first time
  • the position of an SIB subframe relative to the end subframe of the MIB needs to have a time offset, so as to ensure that the terminal device can receive the SIB in time.
  • the start time of sending the SIB for the first time in the first time unit in the second cycle is a time shifted by T4 and T5 from the start time of the second cycle to which the first transmitted SIB belongs.
  • T4 represents the duration of the primary fixed channel
  • T5 represents the time offset from the end subframe position of the MIB transmission (or primary fixed channel).
  • the time unit of T4 and T5 is the same as the unit of time unit, which is 1ms or 10ms, T4 is an integer greater than or equal to 1, and T5 is an integer greater than or equal to 0.
  • FIG. 5 is another schematic structural diagram of sending an SIB according to an embodiment of the present application.
  • the duration of the second cycle is 1280 ms and the duration of the time unit is 160 ms.
  • One time unit includes 8 channels. The length of the eight channels is 20ms. Each channel includes 20 subframes, and the duration of one subframe is 1ms.
  • the first channel is used as the main fixed channel for transmitting synchronization signals and MIBs, that is, the duration of the main fixed channel is 20ms.
  • the remaining 7 channels are used as data channels for transmitting uplink data and downlink data, and the duration of each data channel is 20ms.
  • the first 2 subframes in a data channel are used to transmit downlink data, and the last 18 subframes are used to transmit uplink data, that is, the uplink and downlink ratio of the data channel is 2 downlink (DL) subframes and 18 uplink (up link, UL) subframe.
  • the position of the first subframe in the current time unit to send the SIB is offset from the start time of the current time unit by the duration of the main fixed channel and the duration of one data channel, that is, 40 ms.
  • a data channel includes 2 downlink subframes, then sending a SIB in the current time unit occupies a total of 4 downlink channels in the data channel.
  • the duration of sending the SIB in the current time unit is 80ms.
  • Other data channels include downlink subframes for transmitting downlink data, that is, the second data channel, the seventh data channel, and the eighth data channel.
  • the service delay caused by the SIB transmission is at least 80ms.
  • the number of data channels shared by the sending SIB in the current time unit is also different.
  • the first 8 subframes in a data channel are used to transmit downlink data
  • the last 12 subframes are used to transmit uplink data
  • the uplink and downlink ratio of the data channel is 8 downlink subframes and 12 uplinks.
  • Subframe In the case that the SIB needs to occupy 8 consecutive downlink subframes in the current time unit, and a data channel includes eight downlink subframes, the SIB sent in the current time unit occupies a total of one downlink downlink data frame.
  • the duration of sending the SIB in the unit is 20ms.
  • Other data channels include downlink subframes for transmitting downlink data, that is, the second data channel, and the fourth to eighth data channels.
  • the service delay caused by the SIB transmission is at least 20ms.
  • the number of uplink subframes in the uplink-downlink ratio of the data channel is greater than the number of downlink subframes.
  • the number of downlink subframes in a data channel may be an integer such as 1, 2, 3, 4, 5, 6, 7, 8, or 9.
  • the number of consecutive downlink subframes required to send the SIB in the current time unit is a multiple of the number of downlink subframes in a data channel
  • the number of data channels required to send the SIB in the current time unit is the current
  • the quotient of the number of consecutive downlink subframes required to send an SIB in a time unit divided by the number of downlink subframes in a data channel, that is, C A / B, where A indicates that the SIB needs to occupy consecutive
  • the number of downlink subframes B represents the number of downlink subframes in a data channel
  • the downlink subframes in the first data channel are all used to transmit the SIB
  • the first three downlink subframes in the second data channel are used to transmit the SIB
  • the last two downlink Sub-frames can be used to transmit downlink data.
  • the downlink subframes in the first data channel are all used to transmit the SIB
  • the first two downlink subframes in the second data channel are used to transmit the SIB
  • the last four downlink Sub-frames can be used to transmit downlink data.
  • the downlink subframes in the first data channel are all used to transmit the SIB
  • the first downlink subframe in the second data channel is used to transmit the SIB
  • the last six downlink subframes Frames can be used to transmit downlink data.
  • the start time of sending the SIB in each time unit can be uniformly specified as the time offset from the start time of the time unit by T4 and T5, that is, the SIB is in each time unit
  • the first downlink subframe transmitted by is offset by T4 and T5 from the first downlink subframe of the current SIB time unit.
  • the above sum of T4 and T5 can be considered as a preset offset value.
  • the preset offset value may be pre-configured to be related to the frame structure.
  • the preset offset value may also be pre-configured by the base station device, for example, the preset offset value is 40 milliseconds.
  • the preset offset value may also be indicated by broadcast information, such as the MIB instruction, and the preset offset value is 40 milliseconds.
  • the preset offset value can also be indicated by a synchronization sequence.
  • the synchronization sequence includes PSS and SSS. Understandably, it is assumed that 10 milliseconds is a radio frame, and the value of the radio frame number n f ranges from 0 to 1023.
  • a radio frame contains 10 sub-frames, each sub-frame contains 2 time slots, and the time slot number n s ranges from 0 to 19 in a radio frame.
  • the start position of each SIB transmission is relative to the start of the time unit to which the SIB transmission belongs.
  • the preset offset value for the position The duration of the first cycle is equal to 2560ms, then the starting position of the SIB transmission in each time unit for sending the SIB satisfies: among them
  • the so-called rounding down refers to rounding up to the nearest integer when the result of the calculation is not an integer.
  • the preset offset value may also be considered as a duration that does not include the duration of the primary fixed channel.
  • the start time of sending the SIB for the first time in each second cycle is the time offset from the start time of the second cycle to which the first transmitted SIB belongs, and the time length of the primary fixed channel and the preset offset value.
  • the start time of sending the SIB in each time unit is the time from the start time of the time unit to the main fixed channel duration and the preset offset value.
  • the preset offset value may be a duration pre-configured by the base station device or a data channel duration, for example, the preset offset value is 20 milliseconds.
  • the duration of the first cycle is 2560ms and the number of SIB repetitions N is equal to 16.
  • the synchronization signal and MIB transmitted by the main fixed channel occupy 20ms, and 8 transmissions are required in the second cycle.
  • SIB each sending SIB takes 8ms, and the downlink signal occupied by the synchronization signal and MIB transmitted by the main fixed channel and the data channel transmitted by the SIB is approximately
  • the downlink duty cycle requirement is 10%, the resources used to transmit downlink data only account for 3.4%, so the SIB overhead can be reduced by increasing the first cycle.
  • the duration of the first cycle is 5120ms
  • the downlink overhead occupied by the synchronization signal and MIB transmitted by the main fixed channel and the SIB transmitted by the data channel is approximately
  • the duration of the first cycle is 10240ms
  • the downlink overhead occupied by the synchronization signal and MIB transmitted by the main fixed channel and the SIB transmitted by the data channel is approximately
  • the duration of the first cycle can be pre-configured according to the actual situation. For example, in areas where there is no duty cycle requirement, the duration of the first cycle is preconfigured to 2560ms. In areas with duty cycle requirements, the duration of the first cycle is pre-configured to 5120ms or 10240ms.
  • the duration of the first cycle can also be configured through MIB to support greater flexibility.
  • each SIB transmission is relative to the start position of the time unit to which the SIB transmission belongs.
  • the start position of the SIB transmission in each time unit in which the SIB is transmitted satisfies: Or alternatively, if the duration of the first cycle is equal to 10240ms, and N> 1, the start position of the SIB transmission within each time unit for sending the SIB satisfies among them
  • the so-called rounding down refers to rounding up to the nearest integer when the result of the calculation is not an integer.
  • the overhead of the SIB can also be reduced by reducing the maximum number of SIB retransmissions.
  • the duration of the first cycle is 2560ms, and the maximum number of repetitions N of the SIB in the first cycle is equal to 8.
  • the downlink signal occupied by the synchronization signal and MIB transmitted by the main fixed channel and the SIB transmitted by the data channel is approximately 4.1%.
  • the number of repetitions of the SIB in the first cycle can be indicated by the MIB. In areas where there is no duty cycle requirement, the number of SIB repetitions is 4, 8, and 16. In areas with duty cycle requirements, the number of SIB repetitions is 2, 4, and 8.
  • the SIBs repeatedly sent in the first cycle are evenly distributed between the second cycles.
  • the terminal device if the downlink data reception (or the downlink data transmission of the base station) of the terminal device coincides with the SIB transmission period, the terminal device (or the base station) needs to delay the SIB transmission duration before continuing the downlink reception (or downlink) Sending), because the SIBs are concentrated to be sent in a fixed channel period, it is possible that most of the downlink resources in the fixed channel period are occupied by the SIB, and the downlink resources occupied by the SIB cannot perform data transmission, thereby increasing service delay. Taking SIB repeated transmission 16 times, each transmission takes 8 downlink subframes as an example, at least 128 consecutive downlink subframes need to be occupied by the SIB.
  • NB-IoT-U is a TDD system
  • the SIB is transmitted in units of time units in the second cycle. The SIB only occupies part of the downlink subframes in one time unit, so the service delay of the terminal device can also be reduced.
  • a secondary fixed channel can be periodically configured on the data channel.
  • the SIBs are all sent in a second cycle.
  • the SIB needs to occupy 128 (16 * 8) ms consecutively, that is, 128 downlink subframes.
  • the duration of a data channel is 20ms and it takes 16 data channels to send the SIB, and the SIB needs to last 320 (16 * 20) ms.
  • FIG. 7 is a schematic structural diagram of a SIB including a secondary fixed channel provided in the prior art.
  • the downlink subframe that can be used to send the SIB does not include at least the downlink subframe occupied by the primary fixed channel and the downlink subframe occupied by the secondary fixed channel.
  • the downlink subframes occupied by the SIB in the embodiments of the present application refer to valid downlink subframes, that is, downlink subframes that can be used to transmit SIBs. In all the downlink subframes, except for the main fixed channel and the downlink subframe used for transmitting the SIB, the remaining downlink subframes may be used for transmitting downlink data.
  • the terminal device since the number of secondary fixed channels in the secondary fixed channel period or the primary fixed channel period may be configured in the SIB, the terminal device does not know the secondary fixed channel period when receiving the SIB.
  • An embodiment of the present application provides an implementable method. When a base station sends an SIB, resource reservation is performed according to a minimum period that a fixed channel can support. The SIB is sent only on resources that are not reserved for the fixed channel. The terminal device is also The SIB reception is performed according to the minimum period reservation mode of the fixed channel.
  • the terminal device assumes that The number of auxiliary fixed channels in a second period is 7, that is, the fixed channel period is 160 ms. As long as it is a reserved fixed channel resource, the downlink subframe corresponding to the fixed channel resource is invalid for the SIB.
  • the duration of the time unit is 160 ms.
  • the adjacent fixed channel period is 160 ms, including the period of the main fixed channel and the secondary fixed channel, and the period of the secondary fixed channel and the secondary fixed channel. It can be seen that, like the primary fixed channel, the secondary fixed channel occupies the first channel of each SIB time unit, that is, the first 20ms of each SIB time unit. Since the SIB can be sent after being offset 40ms from the start of the time unit where the SIB is located, the SIB and the secondary fixed channel will not conflict.
  • the SIB can be sent from the start of the time unit where the SIB is located and offset by 40ms, and then the SIB is sent. Therefore, the SIB and the auxiliary fixed channel are not Will conflict.
  • the adjacent fixed channel period is 320 ms.
  • the secondary fixed channel and the SIB time unit have an intersection time unit.
  • the secondary fixed channel is the same as the primary fixed channel.
  • Each fixed channel occupies the first channel of each SIB time unit, that is, the first 20ms of each SIB time unit.
  • the SIB may be sent and then sent again after an offset of 40ms from the start of the time unit where the SIB is located, so that the SIB and the secondary fixed channel do not conflict.
  • the start time of sending the SIB in each time unit is a time shifted from the start time of the time unit by a preset offset value, thereby effectively avoiding the position of the auxiliary fixed channel and further reducing
  • the service delay caused by the SIB transmission is avoided, and the collision between the SIB and the secondary fixed channel transmission time is avoided.
  • the N / m SIBs transmitted in each second cycle may occupy N / m times unit.
  • the N / m time units may be continuously distributed (centrally distributed) in each second cycle, that is, the N / m time units are continuously transmitted.
  • each transmitted SIB occupies consecutive downlink subframes.
  • each transmitted SIB can occupy 8 consecutive downlink subframes.
  • each transmitted SIB may occupy 4 consecutive downlink subframes.
  • the duration of the time unit described in the embodiments of the present application may also be multiplexed with the definition in the NB-IoT system.
  • the duration of the time unit may be considered to be 160 ms regardless of the number of repetitions of the SIB.
  • the duration of the time unit may be determined according to the number of data channels occupied by the SIB when sending the SIB and the channel duration of each data channel. For example, if the channel duration of one channel is 20 milliseconds, and the current SIB transmission occupies 4 data channels, the duration of the time unit is 80 milliseconds. If the current SIB transmission occupies 2 data channels, the duration of the time unit is 40 milliseconds. It can be understood that the duration of the time unit described in the embodiment of the present application includes the sending duration of sending the SIB.
  • T1 2560ms
  • T2 1280ms
  • the number of repetitions of the SIB is 16, 8, 4, 2, and 1, respectively.
  • N 16 SIBs are sent in each second cycle.
  • the 8 SIBs sent in each second cycle occupy 8 time units.
  • the SIBs sent each time occupy a time unit. Continuously transmitted (continuously distributed) every second period.
  • N 4
  • two SIBs are sent in each second cycle.
  • the two SIBs sent in each second cycle occupy two time units. Each time SIB is sent, one time unit is used. Continuously transmitted (continuously distributed) every second period.
  • the start time of sending the SIB for the first time in each second cycle is a time offset from the start time of the second cycle to which the first transmitted SIB belongs by a preset offset value.
  • the time unit duration is 160ms
  • the start time of sending the SIB in each time unit is offset from the start time of the time unit.
  • the moment of the preset offset value For other detailed descriptions of the preset offset value, reference may be made to the description in the first implementable manner, which is not repeated in the embodiment of the present application. For other detailed descriptions of downlink overhead and auxiliary fixed channels, etc., reference may also be made to the description in the first implementable manner, which is not repeatedly described in this embodiment of the present application.
  • the SIBs repeatedly sent in the first cycle are evenly distributed between the second cycles.
  • the terminal device receiving the SIB again can ensure that the terminal device completely receives the first transmission of the SIB in the second period.
  • downlink data transmission may be interrupted by SIB transmission multiple times, so service delay It is larger than the service delay in the first implementable manner, but smaller than the prior art.
  • N / m SIBs are continuously transmitted in each second period. At this time, there is no time unit described in the first implementation manner and the second implementation manner described above.
  • Each transmitted SIB can occupy consecutive downlink subframes. If each transmitted SIB can occupy 8 consecutive downlink subframes, the N / m transmitted SIBs occupy consecutive N * 8 / m downlink subframes. If the SIB transmitted each time can occupy 4 consecutive downlink subframes, the SIB transmitted N / m times can occupy consecutive N * 4 / m downlink subframes.
  • T1 2560ms
  • T2 1280ms
  • N 16
  • 8 SIBs are sent in each second period
  • 8 SIBs are sent continuously (continuous distribution) in each second period
  • the duration of the SIB is 160ms, that is, the increased service delay is 160ms.
  • the SIB is transmitted twice in each second cycle, and the SIB is transmitted continuously (continuously) twice in each second cycle.
  • * 8/2 16 downlink subframes. Taking a data channel with a duration of 20ms and an uplink and downlink ratio of the data channel with 8 downlink subframes and 12 uplink subframes as an example, the duration of the SIB is 40ms, that is, the increased service delay is 40ms.
  • the SIB is sent once in each second cycle, and the SIB is sent continuously (continuously distributed) once in each second cycle.
  • 8/2 8 downlink subframes.
  • the duration of the SIB is 20ms, that is, the increased service delay is 20ms.
  • N 1
  • the SIB is sent once in the first second period in the first period, and the SIB is not sent in the second second period in the first period.
  • the start time of transmitting the SIB for the first time in each second cycle is a time offset from the start time of the second cycle to which the first transmitted SIB belongs by a preset offset value.
  • a preset offset value reference may be made to the description in the first implementable manner, which is not repeated in the embodiment of the present application.
  • downlink overhead and auxiliary fixed channels, etc. reference may also be made to the description in the first implementable manner, which is not repeatedly described in this embodiment of the present application.
  • FIG. 14 is a schematic structural diagram of still another SIB transmission according to an embodiment of the present application.
  • the duration of the second cycle is 1280 ms
  • the second cycle includes 64 channels
  • the duration of the 64 channels is 20 ms.
  • Each channel includes 20 subframes, and the duration of one subframe is 1ms.
  • the first channel is used as the main fixed channel for transmitting synchronization signals and MIBs, that is, the duration of the main fixed channel is 20ms.
  • the remaining channels are used as data channels for transmitting uplink data and downlink data.
  • the first 2 subframes in a data channel are used to transmit downlink data, and the last 18 subframes are used to transmit uplink data, that is, the uplink and downlink ratio of the data channel is 2 downlink subframes and 18 uplink subframes.
  • the position of the first subframe in the current second period to send the SIB is offset from the start time of the current second period by the length of the main fixed channel and the length of one data channel, that is, 40 ms.
  • the SIB is repeatedly transmitted 8 times, and each transmitted SIB occupies 8 consecutive downlink subframes.
  • the SIB needs to occupy 64 consecutive downlink subframes.
  • a data channel includes two downlink subframes, so sending a SIB in the current second cycle occupies a total of 32 downlink channels in the data channel, and the duration of sending the SIB in the current second cycle is 640ms. Downlink subframes included in other data channels are used to transmit downlink data. At this time, the service delay caused by the SIB transmission is at least 640ms.
  • the number of data channels shared by the sending SIB in the current second cycle is also different.
  • the first 8 subframes in a data channel are used to transmit downlink data
  • the last 12 subframes are used to transmit uplink data
  • the uplink and downlink ratio of the data channel is 8 downlink subframes and 12 uplinks. Subframe.
  • the SIB needs to occupy 64 consecutive downlink subframes in the current second cycle, and one data channel includes 8 downlink subframes, then sending the SIB in the current second cycle consumes a total of 8 downlink downlink subframes, The duration of sending the SIB in the current second cycle is 160ms. Downlink subframes included in other data channels are used to transmit downlink data. At this time, the service delay caused by the SIB transmission is at least 160ms.
  • the SIBs repeatedly sent in the first cycle are evenly distributed between the second cycles and concentratedly distributed in the second cycle.
  • the terminal device receiving the SIB again can ensure that the terminal device completely receives the first transmission of the SIB in the second period.
  • downlink data transmission may be interrupted by SIB transmission multiple times, so service delay It is larger than the service delay in the first implementable manner, but smaller than the prior art.
  • the N / m SIBs sent in each second cycle may occupy N / m times unit.
  • the duration of the time unit is T2 * m / N.
  • the duration of the time unit may be T1 / m.
  • the SIB can be evenly distributed, that is, the p downlink subframes occupied by each SIB transmission are evenly distributed in each of the time units to which it belongs.
  • P is A positive integer greater than 0.
  • each transmitted SIB may occupy 8 downlink subframes, and the 8 downlink subframes occupied by SIB transmission within the time unit occupied by the transmission of the SIB are evenly distributed within each time unit to which they belong.
  • the SIB transmitted each time can occupy 4 downlink subframes, and the 4 downlink subframes occupied by the SIB transmission in the time unit occupied by the transmission of the SIB are even in each time unit to which they belong. distributed.
  • the start time of the first SIB transmission in each time unit in the second cycle is relative to the current time.
  • the start time of the time unit needs to be shifted from the start time of the current time unit for a period of time according to a preset offset value before sending the SIB. Therefore, the subframes used to send the SIB in the time unit can be distributed evenly within the remaining time after the start time of the current time unit is offset from the preset offset value.
  • the first period includes two second periods.
  • each second cycle contains 8 time units
  • 8 time units are evenly distributed in each second cycle.
  • the duration of the primary fixed channel and the duration of the data channel are both 20 ms
  • each ((( T2 * m / N) -T6) / p duration includes at least one downlink subframe for sending SIB.
  • T6 represents a preset offset value.
  • the number of channels that can be used to transmit the SIB in one time unit is equal to the number of downlink subframes required to transmit the SIB once.
  • each second cycle contains 4 time units
  • 4 time units are evenly distributed in each second cycle.
  • the number of channels that can be used to transmit the SIB in one time unit is equal to the number of downlink subframes required to transmit the SIB once. .
  • each second cycle includes 2 time units.
  • 2 time units are evenly distributed in each second cycle.
  • the 8 downlink subframes occupied by the SIB transmission can be evenly distributed within the first 400ms of the remaining 600ms within the time unit after the offset.
  • two downlink subframes are sent every 100 ms within the first 400 ms of the remaining 600 ms in the time unit after the offset, and the two downlink subframes may be downlink subframes in the same channel.
  • 100ms includes 5 channels.
  • each second cycle includes one time unit.
  • the 4 downlink subframes occupied by SIB transmission can be evenly distributed within the first 1120ms (28 channels) of the remaining 1200ms in the time unit after the offset.
  • one downlink subframe is sent every 280ms within the first 1120ms of the remaining 1200ms in the time unit after the offset.
  • 280ms includes 7 channels. The first downlink subframe in the first channel of each of the 7 channels is used to send the SIB.
  • N 1
  • FIG. 20 is a schematic structural diagram of still another SIB transmission according to an embodiment of the present application.
  • the duration of the second cycle is 1280 ms and the duration of the time unit is 160 ms.
  • One time unit includes 8 channels. The length of the eight channels is 20ms. Each channel includes 20 subframes, and the duration of one subframe is 1ms.
  • the first channel is used as the main fixed channel for transmitting synchronization signals and MIBs, that is, the duration of the main fixed channel is 20ms.
  • the remaining 7 channels are used as data channels for transmitting uplink data and downlink data, and the duration of each data channel is 20ms.
  • the first 2 subframes in a data channel are used to transmit downlink data, and the last 18 subframes are used to transmit uplink data, that is, the uplink and downlink ratio of the data channel is 2 downlink subframes and 18 uplink subframes.
  • the position of the first subframe in the current time unit to send the SIB is offset from the start time of the current time unit by the duration of the main fixed channel and the duration of one data channel, that is, 40 ms.
  • one data channel includes 2 downlink subframes
  • the first of each of the last 6 data channels in the current time unit The downlink sub-frame is used to send the SIB, and then the second downlink sub-frame in any two data channels of the last 6 data channels is selected to send the remaining 2 SIBs, and the offset is preset in each time unit
  • Each 20ms after the offset value includes at least one downlink subframe for sending the SIB.
  • the service delay caused by the SIB transmission is at least 40ms.
  • the SIB transmission methods described in the above embodiments may be used in combination.
  • the N / m SIBs transmitted in each second cycle may occupy N / m time units.
  • N / m time units can be evenly distributed or continuous (centralized), that is, N / m time units are sent continuously.
  • the SIB can be continuous. Distributed or evenly distributed.
  • the terminal device receives N SIBs in the first cycle in the time domain.
  • the base station needs to send a synchronization signal and a MIB to the terminal device before sending the SIB repeatedly N times in the first period in the time domain.
  • the embodiment of the present application may further include the following steps.
  • the base station sends the synchronization signal and the main information block to the terminal device by using a fixed channel.
  • the terminal device receives a synchronization signal and a main information block on a fixed channel.
  • the terminal device After the terminal device receives the synchronization signal and the main information block, and synchronizes with the base station after performing the SIB and performs random access, it can communicate with the base station.
  • FIG. 22, FIG. 23 and FIG. 24 are schematic diagrams of three frame structures of the NB-IoT-U provided by the embodiments of the present application.
  • the primary fixed channel shown in FIG. 22, FIG. 23, and FIG. 24 may also be referred to as a primary fixed channel segment (primary anchor channel segment) or a primary fixed segment (or anchor segment) or fixed segment (anchor segment).
  • the secondary fixed channel can also be referred to as a secondary fixed channel segment or a secondary fixed segment.
  • a data channel can also be referred to as a data channel segment (data channel segment) or a data segment (data segment).
  • any of the so-called channels of the channels, data channels, primary fixed channels, secondary fixed channels, and fixed channels described in the embodiments of the present application can be understood as different occupations for each frequency hopping. channel.
  • a fixed segment can be called a channel
  • each data frame in a data segment can be called a channel.
  • the number of channels can also be understood as the number of data frames.
  • the one data frame means that each time unit in the data segment with independent uplink and downlink forms a data frame.
  • the data segment can also refer to all data frames in the fixed channel period except the main fixed segment and the secondary fixed segment. It can also refer to a data frame.
  • the data segment and Data frames are interchangeable.
  • the channel duration of each channel can also be pre-configured or configured through MIB, which can be 20ms or 40ms.
  • each network element such as a base station and a terminal device, includes a hardware structure and / or a software module corresponding to each function.
  • this application can be implemented in hardware or a combination of hardware and computer software. Whether a certain function is performed by hardware or computer software-driven hardware depends on the specific application and design constraints of the technical solution. A professional technician can use different methods to implement the described functions for each specific application, but such implementation should not be considered to be beyond the scope of this application.
  • each functional module may be divided corresponding to each function, or two or more functions may be integrated into one processing module.
  • the above integrated modules can be implemented in the form of hardware or software functional modules. It should be noted that the division of the modules in the embodiments of the present application is schematic, and is only a logical function division. In actual implementation, there may be another division manner.
  • FIG. 25 shows a schematic diagram of a possible composition of the base station involved in the foregoing and embodiments.
  • the base station can execute any method embodiment of each method embodiment of the present application. Steps performed by the base station.
  • the base station may include: a sending unit 2501.
  • the sending unit 2501 is configured to support the base station to perform S301 in the SIB transmission method shown in FIG. 3 and S301 and S303 in the SIB transmission method shown in FIG. 21.
  • the base station may further include a processing unit 2502 and a receiving unit 2503.
  • the base station provided in the embodiment of the present application is configured to execute the above-mentioned SIB transmission method, and thus can achieve the same effect as the above-mentioned SIB transmission method.
  • FIG. 26 is a schematic structural diagram of a device according to an embodiment of the present application. As shown in FIG. 26, the device may include at least one processor 2601, a memory 2602, a transceiver 2603, and a bus 2604.
  • the processor 2601 is a control center of the device, and may be a processor or a collective name of multiple processing elements.
  • the processor 2601 is a central processing unit (CPU), may also be a specific integrated circuit (Application Specific Integrated Circuit, ASIC), or one or more integrated circuits configured to implement the embodiments of the present application.
  • CPU central processing unit
  • ASIC Application Specific Integrated Circuit
  • microprocessors Digital Signal Processor, DSP
  • FPGA Field Programmable Gate Array
  • the processor 2601 may execute various functions of the device by running or executing software programs stored in the memory 2602 and calling data stored in the memory 2602.
  • the processor 2601 may include one or more CPUs, such as CPU0 and CPU1 shown in FIG. 26.
  • the device may include multiple processors, such as the processor 2601 and the processor 2605 shown in FIG. 26.
  • processors can be a single-core processor (single-CPU) or a multi-core processor (multi-CPU).
  • a processor herein may refer to one or more devices, circuits, and / or processing cores for processing data (such as computer program instructions).
  • the memory 2602 may be a read-only memory (ROM) or other types of static storage devices that can store static information and instructions, a random access memory (Random Access Memory, RAM), or other types that can store information and instructions
  • the dynamic storage device can also be Electrically Erasable Programmable Read-Only Memory (EEPROM), Compact Disc (Read-Only Memory, CD-ROM) or other optical disk storage, optical disk storage (Including compact discs, laser discs, optical discs, digital versatile discs, Blu-ray discs, etc.), disk storage media or other magnetic storage devices, or can be used to carry or store desired program code in the form of instructions or data structures and can be used by a computer Any other media accessed, but not limited to this.
  • the memory 2602 may exist independently, and is connected to the processor 2601 through a bus 2604.
  • the memory 2602 may also be integrated with the processor 2601.
  • the memory 2602 is configured to store a software program that executes the solution of the present application, and is controlled and executed by the processor 2601.
  • the transceiver 2603 is configured to communicate with other devices or a communication network. For example, it is used to communicate with communication networks such as Ethernet, radio access network (RAN), wireless local area networks (WLAN) and the like. If the device is a base station, the transceiver 2603 may include all or part of a baseband processor, and may optionally include an RF processor. The RF processor is used to transmit and receive RF signals, and the baseband processor is used to implement processing of the baseband signal converted from the RF signal or the baseband signal to be converted into the RF signal.
  • RAN radio access network
  • WLAN wireless local area networks
  • the transceiver 2603 is configured to send N times of SIBs and receive N times of SIBs.
  • the bus 2604 may be an Industry Standard Architecture (ISA) bus, an External Component Interconnect (PCI) bus, or an Extended Industry Standard Architecture (EISA) bus.
  • ISA Industry Standard Architecture
  • PCI External Component Interconnect
  • EISA Extended Industry Standard Architecture
  • the bus can be divided into an address bus, a data bus, a control bus, and the like. For ease of representation, only one thick line is used in FIG. 26, but it does not mean that there is only one bus or one type of bus.
  • the device structure shown in FIG. 26 does not constitute a limitation on the device, and may include more or fewer components than shown, or some components may be combined, or different components may be arranged.
  • FIG. 27 shows another possible composition diagram of the base station involved in the foregoing embodiment.
  • the base station includes a processing module 2701 and a communication module 2702.
  • the processing module 2701 is used to control and manage the actions of the base station and / or other processes used in the technology described herein.
  • the communication module 2702 is configured to support communication between the base station and other network entities, for example, communication with the functional modules or network entities shown in FIG. 28 and FIG. 29. Specifically, for example, the communication module 2702 is configured to support the base station to execute S301 in FIG. 3 and S301 and S303 in FIG. 21.
  • the base station may further include a storage module 2703 for storing program code and data of the base station.
  • the processing module 2701 may be a processor or a controller. It may implement or execute various exemplary logical blocks, modules, and circuits described in connection with the disclosure of this application.
  • a processor may also be a combination that implements computing functions, such as a combination of one or more microprocessors, a combination of a DSP and a microprocessor, and so on.
  • the communication module 2702 may be a transceiver, a transceiver circuit, or a communication interface.
  • the storage module 2703 may be a memory.
  • the base station involved in this embodiment of the present application may be the device shown in FIG. 26.
  • FIG. 28 shows a possible composition diagram of the terminal device involved in the foregoing and embodiments, and the terminal device can execute any one of the method embodiments of the present application Steps performed by the terminal device in the embodiment.
  • the terminal device may include: a receiving unit 2801.
  • the receiving unit 2801 is configured to support a terminal device to execute S302 in the SIB transmission method shown in FIG. 3 and S302 and S304 in the SIB transmission method shown in FIG. 21.
  • the terminal device may further include a processing unit 2802 and a sending unit 2803.
  • the terminal device configured to execute the above-mentioned SIB transmission method, and thus can achieve the same effect as the above-mentioned SIB transmission method.
  • FIG. 29 shows another possible composition diagram of the terminal device involved in the foregoing embodiment.
  • the terminal device includes a processing module 2901 and a communication module 2902.
  • the processing module 2901 is used to control and manage the actions of the terminal device and / or other processes used in the technology described herein.
  • the communication module 2902 is configured to support communication between the terminal device and other network entities, for example, communication with the functional modules or network entities shown in FIG. 25 and FIG. 27.
  • the communication module 2902 is configured to support a terminal device to execute S302 in FIG. 3, and S302 and S304 in FIG. 21.
  • the terminal device may further include a storage module 2903 for storing program code and data of the terminal device.
  • the processing module 2901 may be a processor or a controller. It may implement or execute various exemplary logical blocks, modules, and circuits described in connection with the disclosure of this application.
  • a processor may also be a combination that implements computing functions, such as a combination of one or more microprocessors, a combination of a DSP and a microprocessor, and so on.
  • the communication module 2902 may be a transceiver, a transceiver circuit, or a communication interface.
  • the storage module 2903 may be a memory.
  • the terminal device involved in this embodiment of the present application may be the device shown in FIG. 26.
  • the disclosed apparatus and method may be implemented in other ways.
  • the device embodiments described above are only schematic.
  • the division of the modules or units is only a logical function division.
  • multiple units or components may be divided.
  • the combination can either be integrated into another device, or some features can be ignored or not implemented.
  • the displayed or discussed mutual coupling or direct coupling or communication connection may be indirect coupling or communication connection through some interfaces, devices or units, which may be electrical, mechanical or other forms.
  • the unit described as a separate component may or may not be physically separated, and the component displayed as a unit may be a physical unit or multiple physical units, that is, may be located in one place, or may be distributed to multiple different places. . Some or all of the units may be selected according to actual needs to achieve the objective of the solution of this embodiment.
  • each functional unit in each embodiment of the present application may be integrated into one processing unit, or each of the units may exist separately physically, or two or more units may be integrated into one unit.
  • the above integrated unit may be implemented in the form of hardware or in the form of software functional unit.
  • the integrated unit When the integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it may be stored in a readable storage medium.
  • the technical solutions of the embodiments of the present application essentially or partly contribute to the existing technology or all or part of the technical solutions may be embodied in the form of a software product, which is stored in a storage medium
  • the instructions include a number of instructions for causing a device (which can be a single-chip microcomputer, a chip, or the like) or a processor to execute all or part of the steps of the method described in each embodiment of the present application.
  • the foregoing storage medium includes various media that can store program codes, such as a U disk, a mobile hard disk, a ROM, a RAM, a magnetic disk, or an optical disk.

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Abstract

Les modes de réalisation de la présente invention se rapportent au domaine des communications, et concernent ainsi un procédé et un dispositif de transmission de SIB, qui peuvent réduire efficacement le retard de l'accès d'un dispositif terminal à un réseau. La solution spécifique comprend les étapes suivantes : un SIB est transmis de manière répétée N fois dans une première période sur un domaine temporel, la première période comprenant m deuxièmes périodes; lorsque N est supérieur ou égal à m, le nombre de répétitions du SIB dans chaque deuxième période allant de la première deuxième période à la (m - 1)-ième deuxième période parmi les m deuxièmes périodes respecte la formule (I), et le nombre de répétitions du SIB dans la m-ième deuxième période parmi les m deuxièmes périodes respecte la formule (II); N est un nombre entier positif supérieur à 0, m est un nombre entier positif supérieur à 0, et la formule (III) représente l'arrondi jusqu'à un nombre entier. Les modes de réalisation de la présente invention sont utilisés dans un processus de transmission d'un SIB. Le procédé fourni dans le présent mode de réalisation peut s'appliquer à des systèmes de communication, tels que V2X, LTE-V, V2V, mise en réseau de véhicule, MTC, IdO, LTE-M, M2M, Internet des objets, et analogues.
PCT/CN2018/089101 2018-05-30 2018-05-30 Procédé et dispositif de transmission de bloc d'informations de système (sib) WO2019227361A1 (fr)

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CN105472528A (zh) * 2014-08-05 2016-04-06 夏普株式会社 基站、用户设备及相关方法
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CN104349484A (zh) * 2013-08-07 2015-02-11 电信科学技术研究院 一种系统信息的发送方法、接收方法、及装置
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