WO2023185652A1 - Procédé et appareil de communication - Google Patents

Procédé et appareil de communication Download PDF

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Publication number
WO2023185652A1
WO2023185652A1 PCT/CN2023/083498 CN2023083498W WO2023185652A1 WO 2023185652 A1 WO2023185652 A1 WO 2023185652A1 CN 2023083498 W CN2023083498 W CN 2023083498W WO 2023185652 A1 WO2023185652 A1 WO 2023185652A1
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WIPO (PCT)
Prior art keywords
terminal device
reference signal
network device
message
sequence
Prior art date
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PCT/CN2023/083498
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English (en)
Chinese (zh)
Inventor
刘云
Original Assignee
华为技术有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Publication date
Priority claimed from CN202210556559.7A external-priority patent/CN116938424A/zh
Application filed by 华为技术有限公司 filed Critical 华为技术有限公司
Publication of WO2023185652A1 publication Critical patent/WO2023185652A1/fr

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation

Definitions

  • the present application relates to the field of wireless communications, and in particular, to a communication method and device.
  • random access is to enable terminal devices to access the network and obtain uplink synchronization.
  • PRACH physical random access channel
  • This application provides a communication method and device that can improve the success rate of random access.
  • this application adopts the following technical solutions:
  • the first aspect is to provide a communication method.
  • the execution subject of this method may be a terminal device or a chip applied in the terminal device.
  • the following description takes the execution subject being a terminal device as an example.
  • the method includes: the terminal device sends the first sequence to the network device through the physical random access channel PRACH. Wherein, the first sequence is associated with the first reference signal.
  • the terminal device receives the second message from the network device. Wherein, the transmission beam of the second message is determined based on the transmission beam of the first reference signal, and the transmission beam of the first reference signal is the beam used by the network device when transmitting the first reference signal.
  • the terminal device indicates (or recommends) the beam to the network device through the first sequence, that is, the transmission beam of the first reference signal associated with the first sequence, so that the network device based on the beam indicated (or recommended) by the terminal device.
  • the success rate of the terminal device receiving the second message is higher, thereby improving the random access success rate.
  • the transmission beam of the second message is the same as the transmission beam of the first reference signal, so as to improve the success rate of the terminal device in receiving the second message.
  • the antenna port quasi-co-location QCL relationship is satisfied between the transmission beam of the second message and the transmission beam of the first reference signal, so as to improve the success rate of the terminal device in receiving the second message as much as possible.
  • the method further includes: the terminal device sends a third message to the network device.
  • the sending beam of the third message is determined based on the receiving beam of the first reference signal.
  • the receiving beam of the first reference signal is the beam used by the terminal device when receiving the first reference signal, so as to improve the success of the network device in receiving the third message. Rate.
  • the method further includes: the terminal device receives a fourth message from the network device.
  • the transmission beam of the fourth message is based on the transmission of the first reference signal. The beam is determined to improve the success rate of the terminal device receiving the fourth message.
  • the first orthogonal sequence is associated with the first reference signal.
  • the first sequence includes a first orthogonal sequence. That is to say, the terminal device indicates (or recommends) the beam to the network device through the first orthogonal sequence, that is, the transmission beam of the first reference signal associated with the first orthogonal sequence.
  • PRACH is repeatedly transmitted, and each PRACH in the repeatedly transmitted PRACH carries an element of the first orthogonal sequence. That is to say, the terminal device sends the first orthogonal sequence to the network device through the preamble sequence of the repeatedly transmitted PRACH to indicate (or recommend) the beam.
  • the method before the terminal device sends the first sequence to the network device through the physical random access channel PRACH, the method further includes: the terminal device receives at least one reference signal from the network device.
  • Each of the at least one reference signals is associated with an orthogonal sequence, and the first reference signal is a reference signal that satisfies the first condition among the at least one reference signals.
  • each reference signal is associated with an orthogonal sequence
  • the terminal device determines the first reference signal based on the signal quality of each reference signal, and then determines the orthogonal sequence associated with the first reference signal.
  • the method before the terminal device receives at least one reference signal from the network device, the method further includes: the terminal device receives the first configuration information from the network device.
  • the first configuration information is used to configure the association between the first reference signal and the first orthogonal sequence, so that when the terminal device determines the first reference signal, it determines based on the first configuration information and the first reference signal.
  • the first orthogonal sequence is used to configure the association between the first reference signal and the first orthogonal sequence, so that when the terminal device determines the first reference signal, it determines based on the first configuration information and the first reference signal.
  • the terminal device receiving the first configuration information from the network device includes: the terminal device receiving the main information block MIB from the network device.
  • the MIB includes first configuration information. That is to say, the first configuration information can be transmitted through the MIB.
  • the terminal device receiving the first configuration information from the network device includes: the terminal device receiving a system information block SIB from the network device.
  • the SIB includes first configuration information. That is to say, the first configuration information can be transmitted through SIB.
  • the first set is associated with a first reference signal.
  • the first set includes at least one preamble sequence, the at least one preamble sequence includes the first preamble sequence, and the first sequence includes the first preamble sequence. That is to say, the terminal device indicates (or recommends) the beam to the network device through the first preamble sequence, that is, the transmission beam of the first reference signal associated with the first preamble sequence.
  • PRACH is repeatedly transmitted, and each PRACH in the repeatedly transmitted PRACH carries a first preamble sequence.
  • the method before the terminal device sends the first sequence to the network device through the physical random access channel PRACH, the method further includes: the terminal device receives at least one reference signal from the network device.
  • Each of the at least one reference signals is associated with a set, and the first reference signal is a reference signal that satisfies the first condition among the at least one reference signals.
  • each reference signal is associated with a set
  • the terminal device determines the first reference signal based on the signal quality of each reference signal, and then determines the orthogonal sequence in the set associated with the first reference signal.
  • the method before the terminal device receives at least one reference signal from the network device, the method further includes: the terminal device receives second configuration information from the network device.
  • the second configuration information is at least used to configure the association between the first reference signal and the first set, so that when the terminal device determines the first reference signal, it determines the third reference signal based on the second configuration information and the first reference signal.
  • a leader sequence is at least used to configure the association between the first reference signal and the first set, so that when the terminal device determines the first reference signal, it determines the third reference signal based on the second configuration information and the first reference signal.
  • the terminal device receiving the second configuration information from the network device includes: the terminal device receiving the main information block MIB from the network device.
  • the MIB includes second configuration information. That is to say, the second configuration information can be transmitted through the MIB.
  • the terminal device receiving the second configuration information from the network device includes: the terminal device receiving a system information block SIB from the network device.
  • the SIB includes second configuration information. That is to say, the second configuration information can be transmitted through SIB.
  • the first reference signal is a reference signal selected by the terminal device from at least one reference signal based on the first condition.
  • the first reference signal is a signal with better signal quality.
  • the method before the terminal device receives at least one reference signal from the network device, the method further includes: the terminal device receives third configuration information from the network device.
  • the third configuration information is used to configure the resource location of the first reference signal, so that the terminal device knows at which resource location(s) the first reference signal is received.
  • the terminal device receiving the third configuration information from the network device includes: the terminal device receiving the main information block MIB from the network device.
  • the MIB includes third configuration information. That is to say, the third configuration information can be transmitted through the MIB.
  • the terminal device receiving the third configuration information from the network device includes: the terminal device receiving a system information block SIB from the network device.
  • the SIB includes third configuration information. That is to say, the third configuration information can be transmitted through SIB.
  • the first reference signal includes a first channel state information reference signal CSI-RS.
  • the terminal device sends the first sequence to the network device through the physical random access channel PRACH, including: the terminal device sends the first orthogonal sequence to the network device through the first preamble sequence of the repeatedly transmitted PRACH.
  • the first sequence includes a first orthogonal sequence.
  • the terminal device receiving the second message from the network device includes: the terminal device receiving the second message from the network device on the first resource.
  • the first resource is associated with the first orthogonal sequence, and/or the second message includes an identifier of the first orthogonal sequence.
  • the network device can still use different orthogonal sequences based on different terminal devices.
  • the sequence is used to distinguish different terminal devices, so that each terminal device receives its corresponding second message, thereby reducing mutual interference between terminal devices.
  • the identity of the first orthogonal sequence is determined based on at least one of the following: the identity of the terminal device, or a random number, so that different terminal devices correspond to different orthogonal sequences. Among them, the random number is generated by the terminal device.
  • the identification of the first orthogonal sequence is associated with the index of the first time unit.
  • the first time unit is the time unit occupied by the first resource in the time domain.
  • the terminal device may determine to receive the second message in one (some) time unit based on the identification of the first orthogonal sequence.
  • the identifier of the first orthogonal sequence is associated with the index of the first frequency domain unit.
  • the first frequency domain unit is a frequency domain unit occupied by the first resource in the frequency domain.
  • the terminal device may determine to receive the second message on one (some) frequency domain units based on the identification of the first orthogonal sequence.
  • the bits occupied by the identifier of the first orthogonal sequence are in the bit range corresponding to the random access preamble identifier RAPID field.
  • the second message carries the identifier of the first orthogonal sequence through the RAPID field.
  • the bits occupied by the identifier of the first orthogonal sequence are in the bit range corresponding to the modulation and coding strategy MCS field.
  • the second message carries the identifier of the first orthogonal sequence through the MCS field.
  • the identifier of the first orthogonal sequence occupies at least one bit in the scheduling information.
  • the second message includes scheduling information.
  • the second message carries the identifier of the first orthogonal sequence through the scheduling information.
  • the terminal device sends the first orthogonal sequence to the network device through the first preamble sequence of the repeatedly transmitted PRACH, including: when the mobile speed of the terminal device is less than or equal to the first speed, or when the terminal device is in In the case of a low-speed scenario, the first orthogonal sequence is sent to the network device through the first preamble sequence of the repeatedly transmitted PRACH.
  • the sequences transmitted on multiple PRACH resources can maintain a certain correlation to ensure as much as possible the orthogonal sequences sent by each terminal equipment. Do not interfere with each other.
  • the second message also includes a first identifier
  • the first identifier indicates that the second message includes an identifier of the first orthogonal sequence to avoid misinterpretation of the meaning of the second message by terminal equipment that does not use repeated transmission.
  • the first identifier indicates that the second message includes the identifier of the first orthogonal sequence, which can also be described as the first identifier is used to determine that the second message includes the identifier of the first orthogonal sequence.
  • the second aspect is to provide a communication method.
  • the execution subject of this method may be a terminal device or a chip applied in the terminal device.
  • the following description takes the execution subject being a terminal device as an example.
  • the method includes: a terminal device sends a first orthogonal sequence to a network device through a repeatedly transmitted physical random access channel PRACH. Afterwards, the terminal device receives the second message from the network device on the first resource. Wherein, the first resource is associated with the first orthogonal sequence, and/or the second message includes an identifier of the first orthogonal sequence.
  • the network device can still determine the preamble sequence based on the different orthogonal sequences. Different terminal devices are distinguished, so that each terminal device receives its corresponding second message, thereby reducing mutual interference between terminal devices.
  • the identity of the first orthogonal sequence is determined based on at least one of the following: the identity of the terminal device, or a random number, so that different terminal devices correspond to different orthogonal sequences. Among them, the random number is generated by the terminal device.
  • the identification of the first orthogonal sequence is associated with the index of the first time unit.
  • the first time unit is the time unit occupied by the first resource in the time domain.
  • the terminal device may determine to receive the second message in one (some) time unit based on the identification of the first orthogonal sequence.
  • the identifier of the first orthogonal sequence is associated with the index of the first frequency domain unit.
  • the first frequency domain unit is a frequency domain unit occupied by the first resource in the frequency domain.
  • the terminal device may determine to receive the second message on one (some) frequency domain units based on the identification of the first orthogonal sequence.
  • the bits occupied by the identifier of the first orthogonal sequence are in the bit range corresponding to the random access preamble identifier RAPID field.
  • the second message carries the identifier of the first orthogonal sequence through the RAPID field.
  • the bits occupied by the identifier of the first orthogonal sequence are in the bit range corresponding to the modulation and coding strategy MCS field.
  • the second message carries the identifier of the first orthogonal sequence through the MCS field.
  • the identifier of the first orthogonal sequence occupies at least one bit in the scheduling information.
  • the second message includes scheduling information.
  • the second message carries the identifier of the first orthogonal sequence through the scheduling information.
  • the terminal equipment sends the first orthogonal sequence to the network equipment through the repeatedly transmitted physical random access channel PRACH, including: when the movement rate of the terminal equipment is less than or equal to the first rate, or when the terminal equipment is in In the case of a low-speed scenario, the first orthogonal sequence is sent to the network device through the repeatedly transmitted PRACH.
  • the sequences transmitted on multiple PRACH resources can maintain a certain correlation to ensure as much as possible the orthogonal sequences sent by each terminal equipment. Do not interfere with each other.
  • the second message also includes a first identifier
  • the first identifier indicates that the second message includes an identifier of the first orthogonal sequence to avoid misinterpretation of the meaning of the second message by terminal equipment that does not use repeated transmission.
  • the first identifier indicates that the second message includes the identifier of the first orthogonal sequence, which can also be described as the first identifier is used to determine that the second message includes the identifier of the first orthogonal sequence.
  • the third aspect is to provide a communication method.
  • the execution subject of this method may be a network device or a chip applied in the network device.
  • the following description takes the execution subject being a network device as an example.
  • the method includes: the network device receives the first sequence from the terminal device through the physical random access channel PRACH. Wherein, the first sequence is associated with the first reference signal.
  • the network device sends the second message to the terminal device. Wherein, the transmission beam of the second message is determined based on the transmission beam of the first reference signal, and the transmission beam of the first reference signal is the beam used by the network device when transmitting the first reference signal.
  • the transmission beam of the second message is the same as the transmission beam of the first reference signal.
  • the antenna port quasi-co-location QCL relationship is satisfied between the transmission beam of the second message and the transmission beam of the first reference signal.
  • the method further includes: the network device receives a third message from the terminal device.
  • the sending beam of the third message is determined based on the receiving beam of the first reference signal, and the receiving beam of the first reference signal is the beam used by the terminal device when receiving the first reference signal.
  • the method further includes: the network device sends a fourth message to the terminal device.
  • the transmission beam of the fourth message is determined based on the transmission beam of the first reference signal.
  • the first orthogonal sequence is associated with the first reference signal.
  • the first sequence includes a first orthogonal sequence.
  • PRACH is repeatedly transmitted, and each PRACH in the repeatedly transmitted PRACH carries an element of the first orthogonal sequence.
  • the method before the network device receives the first sequence from the terminal device through the physical random access channel PRACH, the method further includes: the network device sends at least one reference signal to the terminal device.
  • Each of the at least one reference signals is associated with an orthogonal sequence, and the first reference signal is a reference signal that satisfies the first condition among the at least one reference signals.
  • the method before the network device sends at least one reference signal to the terminal device, the method further includes: the network device sends the first configuration information to the terminal device.
  • the first configuration information is used to configure an association relationship between the first reference signal and the first orthogonal sequence.
  • the network device sends the first configuration information to the terminal device, including: the network device sends the main information block MIB to the terminal device.
  • the MIB includes first configuration information.
  • the network device sends the first configuration information to the terminal device, including: the network device sends a system information block SIB to the terminal device.
  • the SIB includes first configuration information.
  • the first set is associated with a first reference signal.
  • the first set includes at least one preamble sequence
  • the at least one preamble sequence includes the first preamble sequence
  • the first sequence includes the first preamble sequence.
  • PRACH is repeatedly transmitted, and each PRACH in the repeatedly transmitted PRACH carries a first preamble sequence.
  • the method before the network device receives the first sequence from the terminal device through the physical random access channel PRACH, the method further includes: the network device sends at least one reference signal to the terminal device.
  • Each of the at least one reference signals is associated with a set, and the first reference signal is a reference signal that satisfies the first condition among the at least one reference signals.
  • the method before the network device sends at least one reference signal to the terminal device, the method further includes: the network device sends second configuration information to the terminal device.
  • the second configuration information is at least used to configure an association relationship between the first reference signal and the first set.
  • the network device sends the second configuration information to the terminal device, including: the network device sends the main information block MIB to the terminal device.
  • the MIB includes second configuration information.
  • the network device sends the second configuration information to the terminal device, including: the network device sends a system information block SIB to the terminal device.
  • the SIB includes second configuration information.
  • the first reference signal is a reference signal selected by the terminal device from at least one reference signal based on the first condition.
  • the method before the network device sends at least one reference signal to the terminal device, the method further includes: the network device sends third configuration information to the terminal device.
  • the third configuration information is used to configure the resource location of the first reference signal.
  • the network device sends the third configuration information to the terminal device, including: the network device sends the main information block MIB to the terminal device.
  • the MIB includes third configuration information.
  • the network device sends the third configuration information to the terminal device, including: the network device sends a system information block SIB to the terminal device.
  • the SIB includes third configuration information.
  • the first reference signal includes a first channel state information reference signal CSI-RS.
  • the network device receives the first sequence from the terminal device through the physical random access channel PRACH, including: the network device receives the first orthogonal sequence from the terminal device through the first preamble sequence of the repeatedly transmitted PRACH. .
  • the first sequence includes a first orthogonal sequence.
  • the network device sends the second message to the terminal device, including: the network device sends the second message to the terminal device on the first resource.
  • the first resource is associated with the first orthogonal sequence, and/or the second message includes an identifier of the first orthogonal sequence.
  • the identity of the first orthogonal sequence is determined based on at least one of the following: an identity of the terminal device, or a random number. Among them, the random number is generated by the terminal device.
  • the identification of the first orthogonal sequence is associated with the index of the first time unit.
  • the first time unit is the time unit occupied by the first resource in the time domain.
  • the identifier of the first orthogonal sequence is associated with the index of the first frequency domain unit.
  • the first frequency domain unit is a frequency domain unit occupied by the first resource in the frequency domain.
  • the bits occupied by the identifier of the first orthogonal sequence are in the bit range corresponding to the random access preamble identifier RAPID field.
  • the bits occupied by the identifier of the first orthogonal sequence are in the bit range corresponding to the modulation and coding strategy MCS field.
  • the identifier of the first orthogonal sequence occupies at least one bit in the scheduling information.
  • the second message includes scheduling information.
  • the second message further includes a first identifier, and the first identifier indicates that the second message includes an identifier of the first orthogonal sequence.
  • the fourth aspect is to provide a communication method.
  • the execution subject of this method may be a network device or a chip applied in the network device.
  • the following description takes the execution subject being a network device as an example.
  • the method includes: a network device receives a first orthogonal sequence from a terminal device through a repeatedly transmitted physical random access channel PRACH. Afterwards, the network device sends the second message to the terminal device on the first resource. Wherein, the first resource is associated with the first orthogonal sequence, and/or the second message includes an identifier of the first orthogonal sequence.
  • the identity of the first orthogonal sequence is determined based on at least one of the following: an identity of the terminal device, or a random number. Among them, the random number is generated by the terminal device.
  • the identification of the first orthogonal sequence is associated with the index of the first time unit.
  • the first time unit is the time unit occupied by the first resource in the time domain.
  • the identifier of the first orthogonal sequence is associated with the index of the first frequency domain unit.
  • the first frequency domain unit is a frequency domain unit occupied by the first resource in the frequency domain.
  • the bits occupied by the identifier of the first orthogonal sequence are in the bit range corresponding to the random access preamble identifier RAPID field.
  • the bits occupied by the identifier of the first orthogonal sequence are in the bit range corresponding to the modulation and coding strategy MCS field.
  • the identifier of the first orthogonal sequence occupies at least one bit in the scheduling information.
  • the second message includes scheduling information.
  • the second message further includes a first identifier, and the first identifier indicates that the second message includes an identifier of the first orthogonal sequence.
  • a communication device may be a terminal device in the above-mentioned first aspect or any possible design of the first aspect, or a chip that implements the functions of the above-mentioned terminal device; the communication device includes a device that implements the above-mentioned function.
  • the module, unit, or means (means) corresponding to the method can be implemented by hardware, software, or by hardware executing corresponding software.
  • the hardware or software includes one or more modules or units corresponding to the above functions.
  • the communication device includes a processing unit, a sending unit and a receiving unit.
  • the processing unit is used to control the sending unit to send the first sequence to the network device through the physical random access channel PRACH.
  • the first sequence is associated with the first reference signal.
  • the processing unit is also used to control the receiving unit to receive the second message from the network device.
  • the transmission beam of the second message is determined based on the transmission beam of the first reference signal, and the transmission beam of the first reference signal is the beam used by the network device when transmitting the first reference signal.
  • the transmission beam of the second message is the same as the transmission beam of the first reference signal.
  • the antenna port quasi-co-location QCL relationship is satisfied between the transmission beam of the second message and the transmission beam of the first reference signal.
  • the sending unit is also configured to send a third message to the network device after the receiving unit receives the second message from the network device.
  • the transmitting beam of the third message is determined based on the receiving beam of the first reference signal, and the receiving beam of the first reference signal is the beam used by the communication device when receiving the first reference signal.
  • the receiving unit is also configured to receive the third message after the sending unit sends the third message to the network device. Receive the fourth message from the network device. The transmission beam of the fourth message is determined based on the transmission beam of the first reference signal.
  • the first orthogonal sequence is associated with the first reference signal.
  • the first sequence includes a first orthogonal sequence.
  • PRACH is repeatedly transmitted, and each PRACH in the repeatedly transmitted PRACH carries an element of the first orthogonal sequence.
  • the receiving unit is also configured to receive at least one reference signal from the network device before the sending unit sends the first sequence to the network device through the physical random access channel PRACH.
  • Each of the at least one reference signals is associated with an orthogonal sequence, and the first reference signal is a reference signal that satisfies the first condition among the at least one reference signals.
  • the receiving unit is further configured to receive the first configuration information from the network device before receiving at least one reference signal from the network device.
  • the first configuration information is used to configure an association relationship between the first reference signal and the first orthogonal sequence.
  • the receiving unit is configured to receive the first configuration information from the network device, including: receiving the main information block MIB from the network device.
  • the MIB includes first configuration information.
  • the receiving unit is configured to receive the first configuration information from the network device, including: receiving a system information block SIB from the network device.
  • the SIB includes first configuration information.
  • the first set is associated with a first reference signal.
  • the first set includes at least one preamble sequence
  • the at least one preamble sequence includes the first preamble sequence
  • the first sequence includes the first preamble sequence.
  • PRACH is repeatedly transmitted, and each PRACH in the repeatedly transmitted PRACH carries a first preamble sequence.
  • the receiving unit is also configured to receive at least one reference signal from the network device before the sending unit sends the first sequence to the network device through the physical random access channel PRACH.
  • Each of the at least one reference signals is associated with a set, and the first reference signal is a reference signal that satisfies the first condition among the at least one reference signals.
  • the receiving unit is further configured to receive the second configuration information from the network device before receiving at least one reference signal from the network device.
  • the second configuration information is at least used to configure an association relationship between the first reference signal and the first set.
  • the receiving unit is configured to receive the second configuration information from the network device, including: receiving the main information block MIB from the network device.
  • the MIB includes second configuration information.
  • the receiving unit configured to receive the second configuration information from the network device, includes: receiving a system information block SIB from the network device.
  • the SIB includes second configuration information.
  • the first reference signal is a reference signal selected by the communication device from at least one reference signal based on the first condition.
  • the receiving unit is further configured to receive third configuration information from the network device before receiving at least one reference signal from the network device.
  • the third configuration information is used to configure the resource location of the first reference signal.
  • the receiving unit is configured to receive the third configuration information from the network device, including: receiving the main information block MIB from the network device.
  • the MIB includes third configuration information.
  • the receiving unit is configured to receive the third configuration information from the network device, including: receiving a system information block SIB from the network device.
  • the SIB includes third configuration information.
  • the first reference signal includes a first channel state information reference signal CSI-RS.
  • the sending unit is configured to send the first sequence to the network device through the physical random access channel PRACH, including: sending the first orthogonal sequence to the network device through the first preamble sequence of the repeatedly transmitted PRACH.
  • the first sequence includes a first orthogonal sequence.
  • the receiving unit is configured to receive the second message from the network device, including: receiving the second message from the network device on the first resource.
  • the first resource is associated with the first orthogonal sequence, and/or the second message includes an identifier of the first orthogonal sequence.
  • the identity of the first orthogonal sequence is determined based on at least one of the following: an identity of the communication device, or a random number.
  • the identification of the first orthogonal sequence is associated with the index of the first time unit.
  • the first time unit is the time unit occupied by the first resource in the time domain.
  • the identifier of the first orthogonal sequence is associated with the index of the first frequency domain unit.
  • the first frequency domain unit is a frequency domain unit occupied by the first resource in the frequency domain.
  • the bits occupied by the identifier of the first orthogonal sequence are in the bit range corresponding to the random access preamble identifier RAPID field.
  • the bits occupied by the identifier of the first orthogonal sequence are in the bit range corresponding to the modulation and coding strategy MCS field.
  • the identifier of the first orthogonal sequence occupies at least one bit in the scheduling information.
  • the second message includes scheduling information.
  • the sending unit is configured to send the first orthogonal sequence to the network device through the first preamble sequence of the repeatedly transmitted PRACH, including: when the movement rate of the communication device is less than or equal to the first rate, or when When the communication device is in a low-speed scenario, the first orthogonal sequence is sent to the network device through the first preamble sequence of the repeatedly transmitted PRACH.
  • the second message further includes a first identifier, and the first identifier indicates that the second message includes an identifier of the first orthogonal sequence.
  • a sixth aspect provides a communication device, which may be a terminal device in the above second aspect or any possible design of the second aspect, or a chip that implements the function of the above terminal device; the communication device includes a device that implements the above
  • the module, unit, or means (means) corresponding to the method can be implemented by hardware, software, or by hardware executing corresponding software.
  • the hardware or software includes one or more modules or units corresponding to the above functions.
  • the communication device includes a processing unit, a sending unit and a receiving unit.
  • the processing unit is used to control the sending unit to send the first orthogonal sequence to the network device through the repeatedly transmitted physical random access channel PRACH.
  • the processing unit is also configured to control the receiving unit to receive the second message from the network device on the first resource.
  • the first resource is associated with the first orthogonal sequence, and/or the second message includes an identifier of the first orthogonal sequence.
  • the identity of the first orthogonal sequence is determined based on at least one of the following: an identity of the communication device, or a random number.
  • the identification of the first orthogonal sequence is associated with the index of the first time unit.
  • the first time unit is the time unit occupied by the first resource in the time domain.
  • the identifier of the first orthogonal sequence is associated with the index of the first frequency domain unit.
  • the first frequency domain unit is a frequency domain unit occupied by the first resource in the frequency domain.
  • the bits occupied by the identifier of the first orthogonal sequence are in the bit range corresponding to the random access preamble identifier RAPID field.
  • the bits occupied by the identifier of the first orthogonal sequence are in the bit range corresponding to the modulation and coding strategy MCS field.
  • the identifier of the first orthogonal sequence occupies at least one bit in the scheduling information.
  • the second message includes scheduling information.
  • the sending unit is configured to send the first orthogonal sequence to the network device through the repeatedly transmitted physical random access channel PRACH, including: when the movement rate of the communication device is less than or equal to the first rate, or when When the communication device is in a low-speed scenario, the first orthogonal sequence is sent to the network device through the repeatedly transmitted PRACH.
  • the second message further includes a first identifier, and the first identifier indicates that the second message includes an identifier of the first orthogonal sequence.
  • a seventh aspect provides a communication device, which may be a network device in the above third aspect or any possible design of the third aspect, or a chip that implements the function of the above network device; the communication device includes a device that implements the above
  • the module, unit, or means (means) corresponding to the method can be implemented by hardware, software, or by hardware executing corresponding software.
  • the hardware or software includes one or more modules or units corresponding to the above functions.
  • the communication device includes a processing unit, a sending unit and a receiving unit.
  • the processing unit is used to control the receiving unit to receive the first sequence from the terminal device through the physical random access channel PRACH.
  • the first sequence is associated with the first reference signal.
  • the processing unit is also used to control the sending unit to send the second message to the terminal device.
  • the transmission beam of the second message is determined based on the transmission beam of the first reference signal, and the transmission beam of the first reference signal is the beam used by the communication device when transmitting the first reference signal.
  • the transmission beam of the second message is the same as the transmission beam of the first reference signal.
  • the antenna port quasi-co-location QCL relationship is satisfied between the transmission beam of the second message and the transmission beam of the first reference signal.
  • the receiving unit is also configured to receive a third message from the terminal device after the sending unit sends the second message to the terminal device.
  • the sending beam of the third message is determined based on the receiving beam of the first reference signal, and the receiving beam of the first reference signal is the beam used by the terminal device when receiving the first reference signal.
  • the sending unit is also configured to send a fourth message to the terminal device after the receiving unit receives the third message from the terminal device.
  • the transmission beam of the fourth message is determined based on the transmission beam of the first reference signal.
  • the first orthogonal sequence is associated with the first reference signal.
  • the first sequence includes a first orthogonal sequence.
  • PRACH is repeatedly transmitted, and each PRACH in the repeatedly transmitted PRACH carries an element of the first orthogonal sequence.
  • the sending unit is also configured to send at least one reference signal to the terminal device before the receiving unit receives the first sequence from the terminal device through the physical random access channel PRACH.
  • Each of the at least one reference signals is associated with an orthogonal sequence, and the first reference signal is a reference signal that satisfies the first condition among the at least one reference signals.
  • the sending unit is further configured to send the first configuration information to the terminal device before sending at least one reference signal to the terminal device.
  • the first configuration information is used to configure the first reference signal and the first orthogonal sequence. relationships between.
  • the sending unit is configured to send the first configuration information to the terminal device, including: sending the main information block MIB to the terminal device.
  • the MIB includes first configuration information.
  • the sending unit is configured to send the first configuration information to the terminal device, including: sending a system information block SIB to the terminal device.
  • the SIB includes first configuration information.
  • the first set is associated with a first reference signal.
  • the first set includes at least one preamble sequence
  • the at least one preamble sequence includes the first preamble sequence
  • the first sequence includes the first preamble sequence.
  • PRACH is repeatedly transmitted, and each PRACH in the repeatedly transmitted PRACH carries a first preamble sequence.
  • the sending unit is configured to send at least one reference signal to the terminal device before the receiving unit receives the first sequence from the terminal device through the physical random access channel PRACH.
  • Each reference signal among the at least one reference signals is associated with a set, and the first reference signal is a reference signal among the at least one reference signals that satisfies the first condition.
  • the sending unit is further configured to send the second configuration information to the terminal device before sending at least one reference signal to the terminal device.
  • the second configuration information is at least used to configure an association relationship between the first reference signal and the first set.
  • the sending unit is configured to send the second configuration information to the terminal device, including: sending the main information block MIB to the terminal device.
  • the MIB includes second configuration information.
  • the sending unit is configured to send the second configuration information to the terminal device, including: sending a system information block SIB to the terminal device.
  • the SIB includes second configuration information.
  • the first reference signal is a reference signal selected by the terminal device from at least one reference signal based on the first condition.
  • the sending unit is also configured to send the third configuration information to the terminal device before sending at least one reference signal to the terminal device.
  • the third configuration information is used to configure the resource location of the first reference signal.
  • the sending unit is configured to send the third configuration information to the terminal device, including: sending the main information block MIB to the terminal device.
  • the MIB includes third configuration information.
  • the sending unit is configured to send the third configuration information to the terminal device, including: sending a system information block SIB to the terminal device.
  • the SIB includes third configuration information.
  • the first reference signal includes a first channel state information reference signal CSI-RS.
  • the receiving unit is configured to receive the first sequence from the terminal device through the physical random access channel PRACH, including: receiving the first orthogonal sequence from the terminal device through the first preamble sequence of the repeatedly transmitted PRACH. sequence.
  • the first sequence includes a first orthogonal sequence.
  • the sending unit is configured to send the second message to the terminal device, including: sending the second message to the terminal device on the first resource.
  • the first resource is associated with the first orthogonal sequence, and/or the second message includes an identifier of the first orthogonal sequence.
  • the identity of the first orthogonal sequence is determined based on at least one of the following: an identity of the terminal device, or a random number. Among them, the random number is generated by the terminal device.
  • the identification of the first orthogonal sequence is associated with the index of the first time unit.
  • the first time unit is the time unit occupied by the first resource in the time domain.
  • the identifier of the first orthogonal sequence is associated with the index of the first frequency domain unit.
  • the first frequency domain unit is a frequency domain unit occupied by the first resource in the frequency domain.
  • the bits occupied by the identifier of the first orthogonal sequence are in the bit range corresponding to the random access preamble identifier RAPID field.
  • the bits occupied by the identifier of the first orthogonal sequence are in the bit range corresponding to the modulation and coding strategy MCS field.
  • the identifier of the first orthogonal sequence occupies at least one bit in the scheduling information.
  • the second message includes scheduling information.
  • the second message further includes a first identifier, and the first identifier indicates that the second message includes an identifier of the first orthogonal sequence.
  • An eighth aspect provides a communication device, which may be a network device in the fourth aspect or any possible design of the fourth aspect, or a chip that implements the function of the above network device; the communication device includes a device that implements the above
  • the module, unit, or means (means) corresponding to the method can be implemented by hardware, software, or by hardware executing corresponding software.
  • the hardware or software includes one or more modules or units corresponding to the above functions.
  • the communication device includes a processing unit, a sending unit and a receiving unit.
  • the processing unit is configured to control the receiving unit to receive the first orthogonal sequence from the terminal device through the repeatedly transmitted physical random access channel PRACH.
  • the processing unit is also configured to control the sending unit to send the second message to the terminal device on the first resource.
  • the first resource is associated with the first orthogonal sequence, and/or the second message includes an identifier of the first orthogonal sequence.
  • the identity of the first orthogonal sequence is determined based on at least one of the following: an identity of the terminal device, or a random number. Among them, the random number is generated by the terminal device.
  • the identification of the first orthogonal sequence is associated with the index of the first time unit.
  • the first time unit is the time unit occupied by the first resource in the time domain.
  • the identifier of the first orthogonal sequence is associated with the index of the first frequency domain unit.
  • the first frequency domain unit is a frequency domain unit occupied by the first resource in the frequency domain.
  • the bits occupied by the identifier of the first orthogonal sequence are in the bit range corresponding to the random access preamble identifier RAPID field.
  • the bits occupied by the identifier of the first orthogonal sequence are in the bit range corresponding to the modulation and coding strategy MCS field.
  • the identifier of the first orthogonal sequence occupies at least one bit in the scheduling information.
  • the second message includes scheduling information.
  • the second message further includes a first identifier, and the first identifier indicates that the second message includes an identifier of the first orthogonal sequence.
  • a communication device in a ninth aspect, includes: a processor and a memory; the memory is used to store computer instructions. When the processor executes the instructions, the communication device causes the communication device to perform any of the above aspects or any aspect required by the terminal equipment in any possible design. method of execution.
  • the communication device may be a terminal device in the above-mentioned first aspect or any possible design of the first aspect, or the communication device may be a terminal device in the above-mentioned second aspect or any possible design of the second aspect, or A chip that implements the above terminal equipment functions.
  • a communication device in a tenth aspect, includes: a processor; the processor is coupled to a memory, and is used to read instructions in the memory and execute them, so that the communication device performs any of the above aspects or any possible design of any aspect.
  • the communication device may be any one of the above-mentioned first aspect or the first aspect.
  • a chip in an eleventh aspect, includes processing circuits and input and output interfaces.
  • the input and output interface is used to communicate with a module outside the chip.
  • the chip may be a chip that implements the function of the terminal device in the above-mentioned first aspect or any possible design of the first aspect.
  • the processing circuit is used to run computer programs or instructions to implement the method in the above first aspect or any possible design of the first aspect.
  • the chip may be a chip that implements the functions of the terminal device in the above second aspect or any possible design of the second aspect.
  • the processing circuit is used to run computer programs or instructions to implement the above second aspect or any method in the possible design of the second aspect.
  • a communication device in a twelfth aspect, includes: a processor and a memory; the memory is used to store computer instructions.
  • the processor executes the instructions, the communication device performs any of the above aspects or any aspect of any possible network equipment in the design. method of execution.
  • the communication device may be a network device in the above-mentioned third aspect or any possible design of the third aspect, or the communication device may be a network device in the above-mentioned fourth aspect or any possible design of the fourth aspect, or A chip that implements the functions of the above network equipment.
  • a communication device in a thirteenth aspect, includes: a processor; the processor is coupled to a memory, and is used to read instructions in the memory and execute them, so that the communication device performs any of the above aspects or any possible design of any aspect.
  • the method performed by the network device may be a network device in the above third aspect or any possible design of the third aspect, or a network device in any possible design of the above fourth aspect or the fourth aspect, or implement the above network device Functional chip.
  • a fourteenth aspect provides a chip.
  • the chip includes processing circuits and input and output interfaces.
  • the input and output interface is used to communicate with a module outside the chip.
  • the chip may be a chip that implements the network device function in the above third aspect or any possible design of the third aspect.
  • the processing circuit is used to run computer programs or instructions to implement the method in the above third aspect or any possible design of the third aspect.
  • the chip may be a chip that implements the network device function in the fourth aspect or any possible design of the fourth aspect.
  • the processing circuit is used to run computer programs or instructions to implement the above fourth aspect or any method in the possible design of the fourth aspect.
  • a computer-readable storage medium stores instructions, which when run on a computer, enable the computer to perform any of the methods in any of the above aspects.
  • a sixteenth aspect provides a computer program product containing instructions that, when run on a computer, enable the computer to perform any of the methods of any of the above aspects.
  • a seventeenth aspect provides a circuit system.
  • the circuitry includes processing circuitry configured to perform a method as in any one of the above aspects.
  • Figure 1 is a schematic architectural diagram of a communication system provided by an embodiment of the present application.
  • Figure 2 is a schematic diagram of a signal structure provided by an embodiment of the present application.
  • Figure 3 is a schematic flow chart of a random access process provided by an embodiment of the present application.
  • Figure 4 is a schematic flow chart of a communication method provided by an embodiment of the present application.
  • Figure 5 is a schematic diagram of a communication scenario provided by an embodiment of the present application.
  • FIG. 6 is a schematic flowchart of yet another communication method provided by an embodiment of the present application.
  • Figure 7 is a schematic diagram of sequence distribution provided by an embodiment of the present application.
  • Figure 8 is a schematic flow chart of another communication method provided by an embodiment of the present application.
  • Figure 9 is a schematic flow chart of another communication method provided by an embodiment of the present application.
  • Figure 10 is a schematic flow chart of another communication method provided by an embodiment of the present application.
  • Figure 11 is a schematic structural diagram of a communication device provided by an embodiment of the present application.
  • Figure 12 is a schematic structural diagram of yet another communication device provided by an embodiment of the present application.
  • any embodiment or design described as “exemplary” or “such as” in the embodiments of the present application is not to be construed as preferred or advantageous over other embodiments or designs. Rather, use of the words “exemplary” or “such as” is intended to present the concept in a concrete manner.
  • two or more includes two itself. Multiple can include two, three, or more.
  • FIG. 1 is a schematic architectural diagram of a communication system 1000 applied in an embodiment of the present application.
  • the communication system 1000 includes at least one network device (110a and 110b in Figure 1) and at least one terminal device (120a-120j in Figure 1).
  • the terminal device is connected to the network device through wireless means.
  • Figure 1 is only a schematic diagram.
  • the communication system may also include other network equipment, such as wireless relay equipment and wireless backhaul equipment, which are not shown in Figure 1 .
  • the network equipment can be a base station (base station), an evolved base station (evolved NodeB, eNodeB), a transmission reception point (TRP), or a next-generation base station (next) in the fifth generation (5th generation, 5G) mobile communication system.
  • generation NodeB, gNB the next generation base station in the sixth generation (6th generation, 6G) mobile communication system, the base station in the future mobile communication system or the access node in the wireless fidelity (wireless fidelity, WiFi) system, etc.
  • It can be a module or unit that completes some functions of the base station.
  • it can be a centralized unit (central unit, CU) or a distributed unit (distributed unit, DU).
  • the CU here completes the functions of the base station’s radio resource control (RRC) protocol and packet data convergence protocol (PDCP), and can also complete the service data adaptation protocol (SDAP) Function;
  • DU completes the functions of the radio link control (RLC) layer and medium access control (MAC) layer of the base station, and can also complete the functions of part or all of the physical layer.
  • RRC radio resource control
  • PDCP packet data convergence protocol
  • SDAP service data adaptation protocol
  • DU completes the functions of the radio link control (RLC) layer and medium access control (MAC) layer of the base station, and can also complete the functions of part or all of the physical layer.
  • RRC radio resource control
  • PDCP packet data convergence protocol
  • SDAP service data adaptation protocol
  • DU completes the functions of the radio link control (RLC) layer and medium access control (MAC) layer of the base station, and can also complete the functions of part or all of the physical layer.
  • RLC radio link control
  • MAC medium access control
  • the network device may be
  • the terminal equipment may also be called a terminal, user equipment (UE), mobile station, mobile terminal, etc.
  • Terminal devices can be widely used in various scenarios, such as device-to-device (D2D), vehicle to everything (V2X) communication, machine-type communication (MTC), and the Internet of Things (internet of things, IOT), virtual reality, augmented reality, industrial control, autonomous driving, telemedicine, smart grid, smart home furniture, smart offices, smart wearables, smart transportation, smart cities, etc.
  • Terminal devices can be mobile phones, tablets, computers with wireless transceiver functions, wearable devices, vehicles, drones, helicopters, airplanes, ships, robots, robotic arms, smart home devices, etc. The embodiments of this application do not limit the specific technology and specific equipment form used by the terminal equipment.
  • Network equipment and terminal equipment can be fixed-location or removable.
  • Network equipment and terminal equipment can be deployed on land, including indoors or outdoors, handheld or vehicle-mounted; they can also be deployed on water; they can also be deployed on aircraft, balloons and satellites in the sky.
  • the embodiments of this application do not limit the application scenarios of network devices and terminal devices.
  • the helicopter or drone 120i in Figure 1 can be configured as a mobile base station.
  • the terminal Device 120i is a network device; but for network device 110a, 120i is a terminal device, that is, communication between 110a and 120i is through a wireless air interface protocol.
  • communication between 110a and 120i can also be carried out through an interface protocol between base stations.
  • relative to 110a, 120i is also a network device. Therefore, both network equipment and terminal equipment can be collectively called communication devices.
  • 110a and 110b in Figure 1 can be called communication devices with network equipment functions
  • 120a-120j in Figure 1 can be called communication devices with terminal equipment functions. .
  • Communication between network equipment and terminal equipment, between network equipment and network equipment, and between terminal equipment and terminal equipment can be carried out through licensed spectrum, communication can also be carried out through unlicensed spectrum, or communication can be carried out through licensed spectrum and unlicensed spectrum at the same time.
  • Communication You can communicate through spectrum below 6 gigahertz (GHz), you can communicate through spectrum above 6GHz, and you can also communicate using spectrum below 6GHz and spectrum above 6GHz at the same time.
  • the embodiments of the present application do not limit the spectrum resources used for wireless communication.
  • the functions of the network device may also be executed by modules (such as chips) in the network device, or may be executed by a control subsystem that includes the functions of the network device.
  • the control subsystem here that includes network equipment functions can be the control center in the above application scenarios such as smart grid, industrial control, smart transportation, smart city, etc.
  • the functions of the terminal equipment can also be performed by modules in the terminal equipment (such as chips or modems), or can be performed by devices containing the functions of the terminal equipment.
  • the network device sends downlink signals or downlink information to the terminal device, and the downlink information is carried on the downlink channel; the terminal device sends uplink signals or uplink information to the network device, and the uplink information is carried on the uplink channel.
  • the terminal device needs to establish a wireless connection with the cell controlled by the network device.
  • the cell with which a terminal device has established a wireless connection is called the serving cell of the terminal device.
  • the signal path loss in space is particularly large.
  • the sending equipment needs to use beamforming to send signals to concentrate the signal energy in a certain direction.
  • the receiving device can also use beamforming to amplify the signal energy received in a certain direction.
  • the transmit beam direction of the transmitting device and the receiving beam direction of the receiving device match the transmission path corresponding to the channel, the receiving device can receive a signal with greater power/energy, or equivalently, the signal received by the receiving device is Have a large signal to noise ratio (SNR) or signal to interference and noise ratio (SINR).
  • SNR signal to noise ratio
  • SINR signal to interference and noise ratio
  • the beam forming technology may be beam forming technology or other technologies.
  • the beamforming technology can be digital beamforming technology, analog beamforming technology, or hybrid digital/analog beamforming technology.
  • the beam can be embodied as a spatial domain filter, or a spatial filter, or a spatial parameter, or a spatial parameter.
  • the beam used to transmit signals can be called a transmission beam (transmission beam, Tx beam), or a spatial domain transmission filter (spatial domain transmission filter), or a spatial transmission parameter (spatial transmission parameter), or a spatial domain transmission parameter. , or called air domain transmission parameters.
  • the beam used to receive the signal can be called the reception beam (reception beam, Rx beam), or the spatial domain receive filter (spatial domain receive filter), or the spatial receive parameter (spatial RX parameter), or the spatial domain reception. parameter.
  • the transmission beam and the reception beam are taken as an example for introduction. A unified explanation is provided here and will not be repeated in the future.
  • the terminal device can achieve downlink synchronization with the network device and obtain system information by receiving SSB from the network device.
  • the SSB may include a primary synchronization signal (primary synchronization signal, PSS), a secondary synchronization signal (secondary synchronization signal, SSS), and a physical broadcast channel (physical broadcast channel, PBCH).
  • PSS primary synchronization signal
  • SSS secondary synchronization signal
  • PBCH physical broadcast channel
  • the terminal device After decoding the PBCH, the terminal device obtains the master information block (MIB). Because the MIB includes the time-frequency location information of control-resource set (CORESET) 0. In this way, the terminal equipment searches for the candidate physical downlink control channel (PDCCH) at the time-frequency position of CORESET0. If the candidate PDCCH is found, the downlink control information (DCI) carried by the PDCCH indicates the resource location of the physical downlink shared channel (PDSCH), so that the terminal equipment receives the system information block (system information block) through the PDSCH. information block (SIB) message.
  • DIB information block
  • the purpose of random access is to enable terminal devices to access the network and obtain uplink synchronization at the same time.
  • the random access process can be divided into contention based and non-contention based or contention-free based.
  • the competition-based random access process mainly includes the following processes:
  • Step 1 The terminal device sends the first message to the network device through the physical random access channel (PRACH) at a certain time-frequency position.
  • the network device receives the first message from the terminal device through the PRACH.
  • PRACH physical random access channel
  • the first message includes a preamble sequence.
  • the preamble sequence may also have other names, such as random access preamble sequence.
  • the preamble sequence is taken as an example for introduction.
  • the first message may also have other names, such as message 1 (Msg1), uplink access signal, or random access signal.
  • Msg1 message 1
  • uplink access signal uplink access signal
  • random access signal random access signal
  • step 2 For the network device, after the network device receives the first message, in response to the first message, the network device performs step 2:
  • Step 2 The network device feeds back the second message to the terminal device.
  • the terminal device receives the second message from the network device.
  • the second message includes the following two pieces of information:
  • the first item is random access preamble identifier (RAPID).
  • RAPID random access preamble identifier
  • the first item is random access preamble identifier (RAPID).
  • RAPID corresponds to the leading sequence in step 1.
  • the second item is uplink resource authorization information.
  • the uplink resource authorization information includes resource location information used to transmit the third message, such as resource index, modulation and coding scheme (MCS) to be used for uplink data transmission, and transmit power used for uplink data transmission. Control (transmit power control, TPC), etc.
  • the second message may also have other names, such as message 2 (message, Msg2).
  • message 2 messages, Msg2
  • the second message is taken as an example for introduction.
  • the terminal device determines the transmission resources allocated by the network device to itself based on RAPID, and performs step 3:
  • Step 3 The terminal device sends the third message to the network device through the physical uplink shared channel (PUSCH).
  • PUSCH physical uplink shared channel
  • the network device receives the third message from the terminal device through PUSCH.
  • the third message includes information for conflict resolution.
  • the third message includes at least one of the following:
  • the first item is the identification of the terminal equipment, such as cell radio network temporary identifier (C-RNTI).
  • C-RNTI cell radio network temporary identifier
  • the second item is a random number. Among them, the random number is generated by the terminal device.
  • the third message may also have other names, such as message 3 (message, Msg3).
  • message 3 messages, Msg3
  • the third message is taken as an example for introduction.
  • Step 4 The network device sends the fourth message to the terminal device through PDSCH.
  • the terminal device receives the fourth message from the network device through the PDSCH.
  • the fourth message indicates the terminal device that wins the conflict resolution, so as to resolve the competition and conflict caused by multiple terminal devices trying to access using the same PRACH resource and the same preamble sequence.
  • the terminal device that wins the conflict resolution is recorded as terminal device 1.
  • the fourth message received by the terminal device includes its own identity; when the terminal device 1.
  • the third message sent includes a random number
  • the fourth message received by the terminal device includes a random number.
  • the random number in the fourth message is the same as the random number in the third message.
  • the fourth message may also have other names, such as message 4 (message, Msg4).
  • message 4 messages, Msg4.
  • the fourth message is taken as an example for introduction.
  • competition-based random access process can also be called four-step random access 4-step RA.
  • downlink transmission refers to the process in which network equipment sends information to terminal equipment.
  • Uplink transmission refers to the process in which terminal devices send information to network devices. Since the transmit power of the power amplifier of the network device is higher than the transmit power of the power amplifier of the terminal device, the coverage of downlink transmission is usually higher than the coverage of uplink transmission, that is, the coverage of uplink transmission is limited. Therefore, coverage enhancement mainly focuses on how to improve the coverage of uplink transmission.
  • Terminal equipment uses repeated transmission to improve the coverage performance of wireless signals.
  • the terminal device sends the preamble sequence through the repeatedly transmitted PRACH.
  • the network device receives the preamble sequence from the terminal device through the repeatedly transmitted PRACH, and combines the repeatedly received preamble sequences to improve the demodulation performance, thereby solving the problem of limited uplink coverage to a certain extent. For example, see Table 1, which shows a PRACH configuration for repeated transmission.
  • PRACH Physical Uplink Control
  • repeated transmission is a way to improve PRACH uplink coverage.
  • PRACH can also be transmitted in other ways to solve the problem of limited uplink transmission coverage.
  • the embodiments of this application are This is not a limitation.
  • the wide beam is still used for transmission.
  • the beam gain corresponding to the message after the PRACH is the same as the beam gain corresponding to the SSB.
  • the message after PRACH still has the problem of low transmission success rate, resulting in random access failure.
  • embodiments of the present application provide a first communication method, which can be applied to the communication system in Figure 1 .
  • the terminal device sends the first sequence to the network device through PRACH.
  • the first sequence is associated with the first reference signal.
  • the terminal device receives the second message from the network device.
  • the transmission beam of the second message is determined based on the transmission beam of the first reference signal, and the transmission beam of the first reference signal is the beam used by the network device when transmitting the first reference signal.
  • the terminal device indicates (or recommends) the beam to the network device through the first sequence, that is, the transmission beam of the first reference signal associated with the first sequence, so that the network device based on the beam indicated (or recommended) by the terminal device. Transmit the second message. In this way, since the transmission beam of the second message is determined based on the beam indicated (or recommended) by the terminal device, the success rate of the terminal device receiving the second message is higher, thereby improving the random access success rate.
  • a wide beam refers to a beam whose beam width is greater than or equal to the threshold 1.
  • a narrow beam refers to a beam whose beam width is less than or equal to the threshold 2.
  • threshold 1 is greater than threshold 2. That is to say, in the embodiment of the present application, the beam width of the wide beam is greater than the beam width of the narrow beam.
  • the communication method 400 proposed by the embodiment of the present application includes the following steps:
  • the terminal device sends the first message to the network device through PRACH.
  • the network device receives the first message from the terminal device through the PRACH.
  • the first message includes a first sequence
  • the first sequence is associated with the first reference signal.
  • the transmission beam of the first message may be a wide beam, and the embodiment of the present application does not limit the beam width of the transmission beam of the first message.
  • the first sequence is introduced as follows: the first sequence includes a first orthogonal sequence.
  • the PRACH in S401 is a repeatedly transmitted PRACH.
  • Each PRACH in the repeatedly transmitted PRACH carries an element of the first orthogonal sequence.
  • the first sequence includes a first leader sequence.
  • the first preamble sequence is the preamble sequence in the first set.
  • the first set is associated with a first reference signal.
  • the first set includes at least one preamble sequence.
  • the PRACH in S401 may be a PRACH that is repeatedly transmitted, or may not be repeatedly transmitted. For details, see the introduction of the second possible implementation method, which will not be described here.
  • the first reference signal is introduced as follows: the first reference signal is a reference signal sent by the network device to the terminal device before S401. For details, see the introduction of S406 or S416, which will not be described again here.
  • the first reference signal includes a channel state information reference signal (channel state information reference signal, CSI-RS). It should be understood that the first reference signal may also include other reference signals, which is not limited in this embodiment of the present application.
  • Example 1 Example 2 and Example 3
  • the association relationship between the first sequence and the first reference signal is introduced.
  • the first sequence includes a first orthogonal sequence
  • Example 2 and Example 3 are introduced as follows:
  • Example 1 the identifier of the first orthogonal sequence is associated with the first reference signal, as shown in Table 2:
  • Table 2 shows four sets of correspondences.
  • "00" the identifier of the orthogonal sequence
  • the identifier of the orthogonal sequence is used to identify the orthogonal sequence [+1, +1, +1, +1]
  • the identifier of the orthogonal sequence "00" is associated with the reference signal CSI-RS1.
  • the corresponding relationships of other groups can be deduced in this way and will not be described again.
  • the identifier of the first orthogonal sequence is used to identify the first orthogonal sequence.
  • the identifier of the first orthogonal sequence includes the index of the first orthogonal sequence, or the identifier of the first orthogonal sequence includes the label of the first orthogonal sequence.
  • the first orthogonal sequence is The identification implementation form of an orthogonal sequence is not limited.
  • the network device configures the resource location of the reference signal for the terminal device.
  • the time domain resource of CSI-RS1 is before the time domain resource of CSI-RS2
  • the time domain resource of CSI-RS2 is before the time domain resource of CSI-RS3.
  • the time domain resources of CSI-RS3 were before the time domain resources of CSI-RS4.
  • the network device configures an orthogonal sequence for the terminal device. For example, 4 orthogonal sequences are configured in sequence, namely [+1, +1, +1, +1], [+1, -1, -1, +1], [+ 1, +1, -1, -1], [+1, -1, +1, -1].
  • the first orthogonal sequence includes the orthogonal sequence [+1, -1, +1, -1].
  • the first reference signal includes CSI-RS4, and the correlation between the two (ie, the first orthogonal sequence and the first reference signal) can be found in the introduction of the above table.
  • Table 2 and Table 3 take 4 sets of correspondence relationships as an example for introduction. Of course, Table 2 (or Table 3) may also include more sets or fewer sets of correspondence relationships. In this embodiment of the present application, Not limited. Table 2 (or Table 3) takes the example that the number of orthogonal sequences is consistent with the number of reference signals. In some embodiments, the number of orthogonal sequences may be greater than the number of reference signals.
  • the network device configures orthogonal sequence parameters for the terminal device, such as For the terminal device, after receiving the parameters of the orthogonal sequence, the terminal device can determine the orthogonal sequence based on formula (1). Formula (1) satisfies:
  • w i (m) represents the orthogonal sequence corresponding to label i
  • label i is the label of the orthogonal sequence
  • m represents the sequence number of the element in the orthogonal sequence
  • the label i is determined based on at least one of the identification of the terminal device and a random number.
  • the identifier of the terminal device includes RNTI
  • the random number is a value generated by the terminal device.
  • the terminal device can substitute different values of the label i into formula (1) to obtain an orthogonal sequence.
  • the terminal device can determine up to 6 orthogonal sequences.
  • the terminal device can substitute other values of the label i into formula (1) to obtain four orthogonal sequences. That is to say, when the number of reference signals is equal to the number of orthogonal sequences, 4 reference signals The number corresponds to the four orthogonal sequences one-to-one.
  • Example 3 the first set in which the first preamble sequence is located is associated with the first reference signal, as shown in Table 5:
  • Table 5 shows four sets of correspondence relationships. Taking four sets as an example, the indexes of the preamble sequences included in set 1 are recorded as 17 to 20, and set 1 corresponds to CSI-RS1. The indexes of the preamble sequences included in set 2 are recorded as 21 to 24, and set 2 corresponds to CSI-RS2. The indexes of the preamble sequences included in set 3 are recorded as 25 to 28, and set 3 corresponds to CSI-RS3. The indexes of the preamble sequences included in set 4 are recorded as 29 to 32, and set 4 corresponds to CSI-RS4.
  • the first preamble sequence may be the preamble sequence identified by index 30, and the first set includes set 4.
  • a collection may also have other names, such as a group.
  • a collection is taken as an example for introduction, and should not be understood as a limitation of the present application.
  • the network device sends the second message to the terminal device.
  • the terminal device receives the second message from the network device.
  • the transmission beam of the second message is determined based on the transmission beam of the first reference signal.
  • the first reference signal in S402 is consistent with the first reference signal in S401, and will not be described again here.
  • the transmission beam of the second message is the same as the transmission beam of the first reference signal.
  • the air domain transmission parameters used by the network device when transmitting the second message are the same as the air domain transmission parameters used when transmitting the first reference signal.
  • the first reference signal includes CSI-RS4, and the transmission beam of the second message is the same as the transmission beam of CSI-RS4.
  • the first reference signal has better reception performance. Since the transmission beam of the second message is the same as the transmission beam of the first reference signal, the second message can also have better reception performance.
  • the transmission beam of the second message and the transmission beam of the first reference signal satisfy an antenna port quasi co-location (QCL) relationship.
  • QCL quasi co-location
  • the channels experienced by the second message and the first reference signal are different, but large-scale characteristics such as Doppler spread, Doppler frequency offset, and average delay spread are the same or similar.
  • the first reference The signal has good reception performance. Since the QCL relationship is satisfied between the transmission beam of the second message and the transmission beam of the first reference signal, the second message can also have good reception performance.
  • the terminal device sends a third message to the network device.
  • the network device receives the third message from the terminal device.
  • the transmitting beam of the third message is determined based on the receiving beam of the first reference signal.
  • the first reference signal in S403 is consistent with the first reference signal in S401, and will not be described again here.
  • the airspace transmission parameters used by the terminal device when sending the third message are determined based on the airspace reception parameters used when receiving the first reference signal.
  • the first reference signal includes CSI-RS4, and the transmission beam of the third message is determined based on the reception beam of CSI-RS4.
  • the first reference signal has better reception performance. Since the airspace transmission parameters of the third message are determined based on the airspace reception parameters of the first reference signal, the third message can also have better transmission. performance.
  • S403 is an optional step.
  • the terminal device may execute S403, or may determine the sending beam of the third message in other ways, which is not limited in the embodiment of the present application.
  • the network device sends a fourth message to the terminal device.
  • the terminal device receives the fourth message from the network device.
  • the transmission beam of the fourth message is determined based on the transmission beam of the first reference signal.
  • the first reference signal in S404 is consistent with the first reference signal in S401, and will not be described again here.
  • the transmission beam of the fourth message is the same as the transmission beam of the first reference signal.
  • the first reference signal includes CSI-RS4
  • the transmission beam of the fourth message is the same as the transmission beam of CSI-RS4.
  • the QCL relationship is satisfied between the transmission beam of the fourth message and the transmission beam of the first reference signal.
  • the introduction of the transmission beam of the second message in S402 which will not be described again here.
  • S404 is an optional step.
  • the network device may execute S404, or may determine the sending beam of the fourth message in other ways, which is not limited in this embodiment of the present application.
  • the first sequence in S401 is introduced through two implementation methods (such as the first possible implementation method and the second possible implementation method):
  • the first sequence includes a first orthogonal sequence.
  • S401 includes S401a:
  • the terminal device sends the first orthogonal sequence to the network device through the repeatedly transmitted PRACH.
  • the network device receives the first orthogonal sequence from the terminal device through the repeatedly transmitted PRACH.
  • Each PRACH in the repeatedly transmitted PRACH carries one element of the first orthogonal sequence.
  • the terminal device sends the first orthogonal sequence to the network device through the second preamble sequence of the repeatedly transmitted PRACH.
  • the network device receives the first orthogonal sequence from the terminal device through the second preamble sequence of the repeatedly transmitted PRACH.
  • the first orthogonal sequence includes [+1, -1, +1, -1]. Each box represents 1 PRACH transmission.
  • the second preamble sequence is multiplied by the first element "+1" of the first orthogonal sequence to obtain the sequence transmitted through the first PRACH.
  • the second preamble sequence is multiplied by the second element "-1" of the first orthogonal sequence to obtain the sequence transmitted through the second PRACH.
  • the third PRACH transmission the second preamble sequence is multiplied by the third element "+1" of the first orthogonal sequence to obtain the sequence transmitted through the third PRACH.
  • the fourth PRACH transmission the second preamble sequence is multiplied by the fourth element "-1" of the first orthogonal sequence to obtain the sequence passed through the fourth PRACH transmission.
  • the terminal device indicates (or recommends) a beam to the network device through the first orthogonal sequence, and the beam is the transmission beam of the first reference signal associated with the first orthogonal sequence.
  • the network device can determine a beam based on the first orthogonal sequence, and the beam is a transmission beam of the first reference signal associated with the first orthogonal sequence.
  • the first sequence sent by the terminal device since the first sequence sent by the terminal device includes the first orthogonal sequence, different terminal devices can send the first sequence through the same resources (including time domain resources and/or frequency domain resources). messages, and the first messages sent by different terminal devices do not interfere with each other. In this way, for the same terminal device, the average amount of resources occupied is reduced, which helps to improve resource utilization. For example, taking 128 time-frequency resources as an example, if the terminal equipment's PRACH does not use repeated transmission, 128 time-frequency resources can serve 128 terminal equipment. When the terminal device uses PRACH with 128 repeated transmissions, 128 time-frequency resources can serve one terminal device.
  • the terminal device sends the first orthogonal sequence through the repeatedly transmitted PRACH
  • more terminal devices can send the first message on the above-mentioned 128 time-frequency resources.
  • the above-mentioned 128 time-frequency resources can serve more terminal devices, thereby reducing the average resource usage of each terminal device.
  • the determination process of the second preamble sequence is as follows: before the network device executes S401, the network device sends SSB.
  • the terminal device within the signal coverage range of the network device receives the SSB from the network device.
  • the SSB can provide some information, and the information provided by the SSB can determine the preamble sequence index range. That is to say, the SSB includes information used to determine the preamble sequence index range.
  • the terminal device after determining the preamble sequence index range based on SSB, the terminal device selects an index from the above-mentioned preamble sequence index range, and uses the preamble sequence corresponding to the selected index as the second preamble sequence.
  • the specific process please refer to the related Technology will not be described in detail here.
  • the terminal device when the movement rate of the terminal device is less than or equal to the first rate, the terminal device performs S401a.
  • the first rate may be a value defined based on relevant protocol regulations. For example, according to relevant protocol specifications, when the moving speed of the terminal equipment is equal to 3km/h, and the angle between the moving direction of the terminal equipment and the network equipment (such as a base station) is 120 degrees, the coherence time between signals is approximately equal to 0.1s. . When the moving speed of the terminal equipment is equal to 30km/h, and the angle between the moving direction of the terminal equipment and the network equipment (such as a base station) is 120 degrees, the coherence duration between the signals is approximately equal to 0.01s.
  • the first speed may be equal to 3km/h, or may be other values, which are not limited in the embodiments of the present application.
  • the terminal device when the terminal device is in a low-speed scenario, the terminal device performs S401a.
  • the low-speed scenario can be understood as that the movement speed of the terminal device is less than or equal to a certain value, such as the first speed.
  • the sequences transmitted on multiple PRACH resources can maintain a certain correlation to ensure as much as possible the orthogonal sequences sent by each terminal equipment.
  • repeatedly transmitted PRACH can maintain phase continuity and/or amplitude continuity within a period of time.
  • the communication method 400 in this embodiment of the present application also includes S405:
  • the network device sends configuration information to the terminal device. Accordingly, the terminal device receives the configuration from the network device information.
  • the configuration information is introduced as follows:
  • Example 1 the configuration information in S405 includes configuration information 1. That is to say, the network device sends configuration information 1 to the terminal device. Correspondingly, the terminal device receives configuration information 1 from the network device.
  • configuration information 1 is used to determine the number of PRACH repetitions.
  • the number of PRACH repetitions is 7, and accordingly, the maximum supported length of the orthogonal sequence is 7.
  • the configuration information in S405 includes configuration information 2. That is to say, the network device sends configuration information 2 to the terminal device. Correspondingly, the terminal device receives configuration information 2 from the network device.
  • configuration information 2 is used to determine the orthogonal sequences available for PRACH repeated transmission.
  • configuration information 2 includes the label of the orthogonal sequence.
  • Example 3 the configuration information in S405 includes configuration information 3. That is to say, the network device sends configuration information 3 to the terminal device. Correspondingly, the terminal device receives configuration information 3 from the network device.
  • the configuration information 3 is at least used to configure the association relationship between the first reference signal and the first orthogonal sequence.
  • the configuration information 3 can also configure the association between other reference signals and orthogonal sequences.
  • the configuration information in S405 includes configuration information 4. That is to say, the network device sends configuration information 4 to the terminal device. Correspondingly, the terminal device receives configuration information 4 from the network device.
  • the configuration information 4 is used to configure the resource location of at least one reference signal.
  • the at least one reference signal includes a first reference signal.
  • the configuration information 4 includes the time unit index of the first reference signal. For example, assuming that the time unit includes a time slot, the configuration information 4 includes a time slot index for transmitting the first reference signal.
  • the configuration information 4 includes the frequency domain unit index of the first reference signal. For example, taking the frequency domain unit including a resource block (RB) as an example, the configuration information 4 includes the index of the RB that transmits the first reference signal.
  • RB resource block
  • the configuration information 4 when the configuration information 4 also configures other reference signals, such as the resource location of the second reference signal, the configuration information 4 also includes the time unit index of the second reference signal. And/or, the configuration information 4 also includes the frequency domain unit index of the second reference signal, which is not limited in the embodiment of the present application.
  • configuration information in S405 may include one or more of the above configuration information 1 to configuration information 4.
  • the above configuration information 1 to configuration information 4 can be sent through the same message, or can also be sent in different messages, which is not limited in the embodiment of the present application.
  • MIB and SIB as examples, we will introduce the carrying status of configuration information 1 to configuration information 4:
  • Step 1 The network device sends at least one SSB.
  • the terminal device within the signal coverage range of the network device receives at least one SSB from the network device.
  • network devices send SSB in a broadcast form.
  • the terminal device can receive at least one SSB from the network device.
  • the transmission beam of the SSB may be a wide beam, such as a beam with a beam width greater than or equal to the threshold 1, so as to cover a wider area.
  • SSB can refer to the introduction in Figure 2 and will not be described again here.
  • the terminal device determines the resource location of the PRACH based on the SSB, thereby executing S401.
  • the PBCH of SSB includes MIB.
  • the MIB includes scheduling information 1.
  • Scheduling information 1 is used to determine the resource location of the SIB.
  • the scheduling information 1 includes resource location information of the SIB. In this case, after the network device performs step 1, it also performs step 2:
  • Step 2 The network device sends the SIB at the resource location determined based on the scheduling information 1.
  • the terminal device within the signal coverage of the network device receives the SIB from the network device at the resource location determined based on the scheduling information 1.
  • the carrying status of the above configuration information 1 to configuration information 4 is introduced: the above four pieces of configuration information (ie, configuration information 1 to configuration information 4) are all carried in the MIB; or, the above four pieces of configuration information (That is, configuration information 1 to configuration information 4) are all carried in the SIB; or, one or more of the above four pieces of configuration information (that is, configuration information 1 to configuration information 4) can be carried in the MIB, and other configuration information is carried in the SIB.
  • the above four pieces of configuration information ie, configuration information 1 to configuration information 4
  • the network device sends at least one reference signal to the terminal device at the resource location determined based on the configuration information 4.
  • the terminal device receives at least one reference signal from the network device at the resource location determined based on the configuration information 4 .
  • the transmission beam of at least one reference signal is a narrow beam.
  • the beam width of the transmission beam of at least one reference signal is smaller than the beam width of the transmission beam of the SSB.
  • the beam gain of the transmission beam of the at least one reference signal is greater than the beam gain of the transmission beam of the SSB to serve terminal equipment in a narrow range. .
  • different reference signals may be transmitted through different transmission beams, or in at least one reference signal, part of the reference signal is transmitted through one transmission beam, and another part of the reference signal is transmitted through another transmission beam.
  • the application examples do not limit this.
  • the network device sends CSI-RS1 to 4 to the terminal device.
  • the terminal device receives CSI-RS1 ⁇ 4 from the network device.
  • the terminal device After receiving at least one reference signal, the terminal device executes S407:
  • the terminal device determines the first reference signal from at least one reference signal.
  • the terminal device determines the first reference signal from at least one reference signal according to the first condition.
  • the first reference signal is a reference signal that satisfies the first condition among at least one reference signal.
  • At least one reference signal in S407 is consistent with at least one reference signal in S406, which will not be described again here.
  • the first condition includes at least one of the following:
  • the first item is that the received signal strength indication (RSSI) of the first reference signal is greater than the first threshold. For example, among CSI-RS1 to 4, if the RSSI of CSI-RS4 is greater than the first threshold, the first reference signal includes CSI-RS4.
  • RSSI received signal strength indication
  • the second item is that the RSSI of the first reference signal is greater than the RSSI of the second reference signal.
  • at least one reference signal in S407 includes a first reference signal and a second reference signal. That is to say, the first reference signal is the reference signal with a larger RSSI among the at least one reference signal in S407.
  • the third item is that the reference signal receiving power (RSRP) of the first reference signal is greater than the second threshold.
  • RSRP reference signal receiving power
  • the fourth item is that the RSRP of the first reference signal is greater than the RSRP of the second reference signal.
  • at least one reference signal in S407 includes a first reference signal and a second reference signal. That is to say, the first reference signal is the reference signal with a larger RSRP among the at least one reference signal in S407.
  • satisfying the first condition means satisfying any one of the first conditions.
  • RSSI and RSRP are taken as examples to introduce the performance indicators used to select the first reference signal.
  • the first condition may also include more or more conditions, which are not limited in the embodiments of the present application.
  • the terminal device After the terminal device performs S407, it can perform S401a to indicate (or recommend) the beam to the network device through the first orthogonal sequence.
  • the network device determines the transmission based on the beam indicated (or recommended) by the terminal device.
  • the transmission beams of other messages after PRACH because the transmission beam of the first reference signal is a narrow beam, have a higher beam gain, and the transmission beams of other messages after PRACH are determined based on the transmission beam of the first reference signal, Therefore, for other messages after PRACH, the beam gain of the transmitting beam can also be improved, thereby providing coverage.
  • S402 to S404 which will not be described again here.
  • the first sequence includes a first preamble sequence.
  • S401 includes S401b:
  • the terminal device sends the first preamble sequence to the network device through the PRACH.
  • the network device receives the first preamble sequence from the terminal device through the PRACH.
  • the first preamble sequence is the preamble sequence in the first set.
  • the first set is associated with a first reference signal.
  • the first set includes at least one leader sequence.
  • each leader sequence has an identifier, such as the index of the leader sequence.
  • the same number of indexes are divided into a set.
  • the first set includes four preamble sequences, and the indexes of the four preamble sequences are recorded as 29 to 32.
  • the first preamble sequence is a preamble sequence in the first set, such as the preamble sequence with index 29.
  • the first set is associated with the first reference signal. Please refer to the introduction in Table 5, which will not be described again here.
  • the terminal device indicates (or recommends) a beam to the network device through the first preamble sequence, and the beam is the transmission beam of the first reference signal associated with the first set.
  • the first set is the set where the first preamble sequence is located.
  • S401b includes step b:
  • Step b The terminal device sends the first orthogonal sequence to the network device through the first preamble sequence of the repeatedly transmitted PRACH.
  • the network device receives the first orthogonal sequence from the terminal device through the first preamble sequence of the repeatedly transmitted PRACH.
  • the first orthogonal sequence includes [+1, -1, +1, -1]. Each box represents 1 PRACH transmission.
  • the first preamble sequence is multiplied by the first element "+1" of the first orthogonal sequence to obtain the sequence transmitted through the first PRACH.
  • the first preamble sequence is multiplied by the second element "-1" of the first orthogonal sequence to obtain the sequence transmitted through the second PRACH.
  • the first preamble sequence is multiplied by the third element "+1" of the first orthogonal sequence to obtain the sequence transmitted through the third PRACH.
  • the first preamble sequence is multiplied by the fourth element "-1" of the first orthogonal sequence to obtain the sequence passed through the fourth PRACH transmission.
  • each PRACH in the repeatedly transmitted PRACH carries an element in the first orthogonal sequence.
  • S401a which will not be repeated here.
  • the transmitted first orthogonal sequence indicates (or recommends) a beam to the network device, and the beam is a transmission beam of the first reference signal associated with the first orthogonal sequence.
  • the terminal device when the movement speed of the terminal device is less than or equal to the first speed, the terminal device performs Step b.
  • the terminal equipment when the terminal equipment is in a low-speed scenario, the terminal equipment performs step b so that the repeatedly transmitted PRACH can maintain phase continuity and/or amplitude continuity within a period of time.
  • the communication method 400 in this embodiment of the present application also includes S415:
  • the network device sends configuration information to the terminal device.
  • the terminal device receives configuration information from the network device.
  • the configuration information is introduced as follows:
  • Example 1 the configuration information in S415 includes configuration information 5. That is to say, the network device sends configuration information 5 to the terminal device. Correspondingly, the terminal device receives configuration information 5 from the network device.
  • the configuration information 5 is at least used to configure the association between the first reference signal and the first set. For details, see the introduction in Table 5, which will not be described again here.
  • Example 2 the configuration information in S415 includes configuration information 4.
  • configuration information 4 in S415 please refer to the introduction of configuration information 4 in S405, which will not be described again here.
  • Example 3 the configuration information in S415 includes configuration information 1.
  • configuration information 1 in S415 includes configuration information 1.
  • Example 4 the configuration information in S415 includes configuration information 2.
  • configuration information 2 in S415 please refer to the introduction of configuration information 2 in S405, which will not be described again here.
  • the configuration information in S415 may include one or more of the above four pieces of configuration information (such as the above configuration information 1, configuration information 2, configuration information 4 and configuration information 5).
  • the above four pieces of configuration information (such as the above-mentioned configuration information 1, configuration information 2, configuration information 4 and configuration information 5) can be sent through the same message, or can be carried in different messages. This is not limited in the embodiment of the present application.
  • the carrying status of four pieces of configuration information (such as the above configuration information 1, configuration information 2, configuration information 4 and configuration information 5) is introduced:
  • the above four pieces of configuration information are all carried in the MIB; or, the above four pieces of configuration information (such as the above configuration information 1, configuration information 2, configuration information 4 and configuration information 5) are all carried in the SIB; alternatively, one or more of the above four configuration information (such as the above configuration information 1, configuration information 2, configuration information 4 and configuration information 5) can be carried in the MIB, and other configurations Information is carried in SIB.
  • the above four pieces of configuration information can also be carried in other messages other than MIB and SIB, and this is not limited in the embodiment of the present application.
  • the network device sends at least one reference signal to the terminal device at the resource location determined based on the configuration information 4.
  • the terminal device receives at least one reference signal from the network device at the resource location determined based on the configuration information 4 .
  • the terminal device After receiving at least one reference signal, the terminal device executes S417:
  • the terminal device determines the first reference signal from at least one reference signal.
  • the terminal device determines a preamble sequence from the first set associated with the first reference signal in combination with Table 5 as the first preamble sequence.
  • the first reference signal includes CSI-RS4, and the first set includes set 4.
  • the terminal device randomly selects a preamble sequence from the preamble sequences with indexes 29 to 32 as the first preamble sequence, and then executes S401b to indicate to the network device through the first preamble sequence (or recommended) beam, the network device determines the sending beam of other messages after transmitting PRACH based on the beam indicated (or recommended) by the terminal device.
  • S402 to S404 which will not be described again here.
  • the terminal device uses the repeatedly transmitted PRACH to send the first preamble sequence
  • more time-frequency resources are occupied, causing the same preamble sequence to be used by more terminal devices, and the network device It is impossible to distinguish different terminal devices, causing mutual interference between terminal devices.
  • S401b includes step b:
  • Step b The terminal device sends the first orthogonal sequence to the network device through the first preamble sequence of the repeatedly transmitted PRACH.
  • the network device receives the first orthogonal sequence from the terminal device through the first preamble sequence of the repeatedly transmitted PRACH.
  • the determination process of the first orthogonal sequence is as follows:
  • the first orthogonal sequence is related to at least one of an identification of the terminal device and a random number (a random number generated by the terminal device).
  • the identity of the first orthogonal sequence is determined based on the random number generated by the terminal device, as shown in Table 6:
  • Table 6 shows four sets of correspondences.
  • "00" the identifier of the orthogonal sequence, is used to identify the orthogonal sequence [+1, +1, +1, +1] , the identity of the orthogonal sequence "00" is associated with the random number 1.
  • the random number 1 may be a random number generated by the terminal device 1
  • the random number 2 may be a random number generated by the terminal device 2
  • the random number 3 may be a random number generated by the terminal device 3
  • the random number 4 may be a random number generated by the terminal device 3. Random number generated by terminal device 4.
  • terminal device 1 sends the orthogonal sequence [+1, +1, +1, +1], and terminal device 2 sends [+1, -1, -1, +1 ] this orthogonal sequence
  • terminal device 3 sends [+1, +1, -1, -1] this orthogonal sequence
  • terminal device 4 sends [+1, -1, +1, -1] this orthogonal sequence
  • the network device can distinguish different terminal devices based on the orthogonal sequences.
  • the terminal device determines the label i according to the random number generated by itself, and determines the first orthogonal sequence based on the determined label i and formula (1). For details, see the details of formula (1). Introduction, no further details will be given here.
  • the identity of the first orthogonal sequence is determined based on the identity of the terminal device, as shown in Table 7:
  • Table 7 shows four sets of correspondences.
  • "00" the identifier of the orthogonal sequence
  • the identifier of the orthogonal sequence is used to identify the orthogonal sequence [+1, +1, +1, +1]
  • the identifier of the orthogonal sequence "00" is associated with the identifier 1.
  • the identifier 1 may be the identifier of the terminal device 1
  • the identifier 2 may be the identifier of the terminal device 2
  • the identifier 3 may be the identifier of the terminal device 3
  • the identifier 4 may be the identifier of the terminal device 4.
  • terminal device 1 sends the orthogonal sequence [+1, +1, +1, +1], and terminal device 2 sends [+1, -1, -1, +1 ] this orthogonal sequence
  • terminal device 3 sends [+1, +1, -1, -1] this orthogonal sequence
  • terminal device 4 sends [+1, -1, +1, -1] this orthogonal sequence
  • the network device can distinguish different terminal devices based on the orthogonal sequences.
  • the terminal device determines the label i according to its own identification, and determines the first orthogonal sequence based on the determined label i and formula (1). For details, see the detailed introduction of formula (1). No further details will be given here.
  • the terminal device can also determine the label i based on the random number generated by itself and its own identification, and determine the first orthogonal sequence based on the determined label i and formula (1). For details, see formula (1 ) will not be repeated here.
  • S402 performed by the network device includes S402a:
  • the network device sends the second message to the terminal device on the first resource.
  • the terminal device receives the second message from the network device on the first resource.
  • the first resource is associated with the first orthogonal sequence
  • the second message includes an identifier of the first orthogonal sequence
  • the identification of the first orthogonal sequence is introduced as follows: The identification of the first orthogonal sequence is determined based on at least one of the following: the identification of the terminal device, or a random number. For details, please refer to the introduction of formula (1) and Table 4. No further details will be given here.
  • Example 1 taking time domain resources as an example, the identifier of the first orthogonal sequence is associated with the index of the first time unit.
  • the first time unit is the time unit occupied by the first resource in the time domain.
  • the identification of the first orthogonal sequence can be used to determine the first time unit.
  • terminal device 1 sends orthogonal sequence 1 on time slot x
  • terminal device 2 sends orthogonal sequence 2 on time slot x
  • terminal device 3 sends orthogonal sequence 2 on time slot x.
  • Sequence 3 orthogonal sequence 1 corresponds to time slot n
  • orthogonal sequence 2 corresponds to time slot n+1
  • orthogonal sequence 3 corresponds to time slot n+2.
  • Time slot n is determined based on time slot x and offset 1. Offset 1 can be preconfigured, such as offset by 1 time slot.
  • the first orthogonal sequence may be the above-mentioned orthogonal sequence 1, orthogonal sequence 2, or orthogonal sequence 3. It should be understood that time units may include frames, subframes, time slots, frames, etc.
  • time slots are used as an example for introduction, and should not be understood as limiting the embodiments of the present application.
  • the identifier of the first orthogonal sequence is associated with the index of the first frequency domain unit.
  • the first frequency domain unit is a frequency domain unit occupied by the first resource in the frequency domain.
  • the identifier of the first orthogonal sequence can be used to determine the first frequency domain unit.
  • terminal device 1 sends orthogonal sequence 1 on the RB with index x
  • terminal device 2 sends orthogonal sequence 2 on the RB with index x
  • terminal device 3 sends orthogonal sequence 2 on the RB with index x.
  • Orthogonal sequence 3 is sent on the RB.
  • orthogonal sequence 1 corresponds to the RB with index n
  • orthogonal sequence 2 corresponds to the RB with index n+1
  • orthogonal sequence 3 corresponds to the RB with index n+2.
  • Index n is determined based on index x and offset 2, and the value of offset 2 can be preconfigured.
  • the first orthogonal sequence may be the above-mentioned orthogonal sequence 1, orthogonal sequence 2, or orthogonal sequence 3. It should be understood that frequency domain units may include RBs, sub-channels, etc. In Example 2, RBs are used as an example for introduction, which should not be understood as a limitation of this article. Limitation of application examples.
  • the first resource when the first resource includes the first time unit, the first resource is associated with the first orthogonal sequence. Please refer to the introduction of Example 1. And/or, in the case where the first resource includes the first frequency domain unit, the first resource is associated with the first orthogonal sequence. Please refer to the introduction of Example 2.
  • Example 1 The bits occupied by the identifier of the first orthogonal sequence are in the bit range corresponding to the RAPID field.
  • the number of preamble sequences available to the terminal device is 64.
  • the RAPID field uses 6 bits to indicate the identity of a preamble sequence.
  • the bit range corresponding to the RAPID field refers to the 6 bits corresponding to the RAPID field in Figure 3.
  • the network device allocates 16 preamble sequences to the terminal device to support PRACH repeated transmission.
  • the second message needs to use 4 bits to indicate one of the 16 preamble sequences. For example, in the case where S401 includes S401b, the second message needs to use 4 bits to indicate the first preamble sequence.
  • the length of the orthogonal sequence allocated by the network device to the terminal device is 4 and can support 4 different orthogonal sequences.
  • the second message needs to use 2 bits to indicate one of the 4 orthogonal sequences. For example, when the first orthogonal sequence is [1,1,1,1], the value of the corresponding 2 bits is "00"; when the first orthogonal sequence is [1,-1,1,- 1], the value of the corresponding 2 bits is "01"; when the first orthogonal sequence is [1,1,-1,-1], the value of the corresponding 2 bits is "10” "; When the first orthogonal sequence is [1,-1,-1,1], the value of the corresponding 2 bits is "11". In this way, the 4 bits corresponding to the PRACH preamble sequence and the 2 bits corresponding to the first orthogonal sequence are combined into 6 bits, which are carried by the RAPID field.
  • the RAPID field includes 4 bits, and the 4 bits indicate the identifier of a preamble sequence. That is to say, in this embodiment of the present application, the bits occupied by the RAPID field are reduced. In this way, the remaining 2 bits in the second message carry the identity of the first orthogonal sequence. Correspondingly, the bits occupied by the identifier of the first orthogonal sequence are outside the RAPID field.
  • Example 2 The bits occupied by the identifier of the first orthogonal sequence are in the bit range corresponding to the MCS field.
  • the coding rate available to the terminal device is the first coding rate
  • the MCS field indicates the index of the first coding rate through M bits.
  • M is a positive integer.
  • the bit range corresponding to the MCS field refers to the M bits corresponding to the MCS field in Figure 3.
  • the encoding rate available to the terminal device is the second encoding rate
  • the MCS field indicates the index of the second encoding rate through N bits.
  • N ⁇ M N is a positive integer.
  • the MCS field can carry the identity of the first orthogonal sequence through the remaining (M-N) bits.
  • the MCS field indicates an index of a coding rate through N bits. That is to say, in this embodiment of the present application, the bits occupied by the MCS field are reduced. In this way, the remaining (M-N) bits in the second message carry the identity of the first orthogonal sequence. Correspondingly, the bits occupied by the identifier of the first orthogonal sequence are outside the MCS field.
  • Example 3 The identifier of the first orthogonal sequence occupies at least one bit in the scheduling information 2.
  • the second message includes scheduling information 2.
  • the scheduling information 2 is used to determine the resource location of the PDSCH, so that the terminal equipment determines which resource location to monitor the PDSCH.
  • the scheduling information 2 includes the PDSCH used to transmit uplink resource authorization information.
  • the scheduling information 2 may include DCI transmitted through the PDCCH.
  • the terminal device determines that the second message includes information to be received by itself based on the identification of the first orthogonal sequence in the scheduling information 2.
  • the terminal device determines the second orthogonal sequence based on the identification of the first orthogonal sequence in the scheduling information 2.
  • the message does not include the information it needs to receive. In this way, the terminal device does not parse other contents in the second message, or the terminal device discards other contents in the second message.
  • the scheduling information 2 is part of the second message is taken as an example for introduction.
  • the second message includes the identification of the first orthogonal sequence
  • the identification of the first orthogonal sequence is not included in the second message.
  • the downlink control signaling for scheduling the second message includes the identifier of the first orthogonal sequence.
  • the downlink control signaling is not part of the second message, that is, the second message does not include downlink control signaling.
  • the terminal device determines that it receives the second message at the resource location determined based on the downlink control signaling based on the identifier of the first orthogonal sequence in the downlink control signaling. .
  • the terminal device determines that it does not need to receive the second message corresponding to the downlink control signaling based on the identifier of the first orthogonal sequence in the downlink control signaling.
  • the second message further includes the first identification.
  • the first identifier is used to determine that the second message includes an identifier of the first orthogonal sequence.
  • the first identifier indicates that the second message in which it is located is suitable for terminal equipment that uses PRACH repeated transmission, so as to avoid misinterpretation of the meaning of the second message by terminal equipment that does not use repeated transmission.
  • the terminal device can learn that the second message where the first identifier is located carries the first orthogonal sequence.
  • the terminal device For a terminal device that does not use repeated transmission, the terminal device does not need to parse the second message.
  • the carrying status of the first identifier in the second message is as follows:
  • Case 1 When the identifier of the first orthogonal sequence is related to the RAPID field, for example, if the bits occupied by the identifier of the first orthogonal sequence are in the bit range corresponding to the RAPID field, the bits occupied by the first identifier can also be in the RAPID field. in the bit range corresponding to the field.
  • Case 2 When the identifier of the first orthogonal sequence is related to the MCS field, for example, if the bits occupied by the identifier of the first orthogonal sequence are in the bit range corresponding to the MCS field, the bits occupied by the first identifier can also be in the MCS field. in the bit range corresponding to the field.
  • the first identifier of the first orthogonal sequence occupies at least one bit in the scheduling information 2
  • the first identifier may also occupy at least one bit in the scheduling information 2.
  • the second message includes scheduling information 2.
  • the second message also includes the first identifier
  • the first identifier is not included in the second message.
  • the downlink control signaling for scheduling the second message includes the first identifier.
  • the downlink control signaling is not part of the second message, that is, the second message does not include downlink control signaling.
  • the RAPID field, the MCS field and the scheduling information 2 are used as examples to introduce the bearing status of the first identifier, which should not be understood as a limitation of the embodiment of the present application.
  • the first identifier can also be carried at other locations in the second message, which is not limited in the embodiments of the present application.
  • terminal device 1 sends orthogonal sequence 1 to the network device
  • terminal device 2 sends orthogonal sequence 2 to the network device.
  • the first orthogonal sequence includes orthogonal sequence 1.
  • the first orthogonal sequence includes orthogonal sequence 2. If the network device sends a second message to terminal device 1 and terminal device 2, if the second message includes the identifier of the first orthogonal sequence, the network device can send the message to terminal device 1 and terminal device 2 on the same time-frequency resource. Second news. That is to say, for terminal device 1 and terminal device 2, the first resources of both terminal devices are the same.
  • the network device sends the second message to the terminal device 1 and the terminal device 2 on different time-frequency resources. That is, for terminal device 1 and terminal device 2 In other words, the first resources of the two are different.
  • the terminal equipment indicates (or recommends) the transmission beam of the second message to the network equipment, and how to improve the capacity and distinguish between different PRACHs in the case of repeated transmissions. Terminal equipment is introduced.
  • the following describes how to increase capacity and differentiate between different terminal devices when the terminal device uses PRACH for repeated transmission.
  • embodiments of the present application provide a second communication method, which can be applied to the communication system in Figure 1 .
  • the terminal device sends the first orthogonal sequence to the network device through the repeatedly transmitted PRACH. Then, the terminal device receives a second message from the network device on the first resource.
  • the first resource is associated with the first orthogonal sequence, for example, the first resource is determined based on the first orthogonal sequence, and/or the second message includes an identifier of the first orthogonal sequence.
  • the terminal equipment sends the first orthogonal sequence, the orthogonal sequences sent by different terminal equipment through PRACH are orthogonal to each other and do not interfere with each other.
  • the network equipment can still use the orthogonal sequence based on the orthogonal sequence. sequence to distinguish different terminal devices, thereby sending the second message to the terminal device on different resources, or the second message includes the identifier of the first orthogonal sequence, so that the terminal device can distinguish the second message it needs to receive, In this way, while improving the system capacity, different terminal devices can be distinguished.
  • the communication method 1000 proposed in the embodiment of this application includes the following steps:
  • the terminal device sends the first message to the network device through PRACH.
  • the network device receives the first message from the terminal device through the PRACH.
  • the first message includes a first orthogonal sequence.
  • the implementation process of S1001 includes:
  • the terminal device sends the first orthogonal sequence to the network device through the second preamble sequence of the repeatedly transmitted PRACH.
  • the network device receives the first orthogonal sequence from the terminal device through the second preamble sequence of the repeatedly transmitted PRACH.
  • the determination process of the second preamble sequence in S1001 is as follows: before the network device executes S1001, the network device sends SSB.
  • the terminal device within the signal coverage range of the network device receives the SSB from the network device.
  • the SSB can provide some information, and the information provided by the SSB can determine the preamble sequence index range. That is to say, the SSB includes information used to determine the preamble sequence index range.
  • the terminal device after determining the preamble sequence index range based on the SSB, the terminal device selects an index from the above-mentioned preamble sequence index range, and uses the preamble sequence corresponding to the selected index as the second preamble sequence. For the specific process, see S401a The introduction will not be repeated here.
  • the first orthogonal sequence is related to at least one of an identification of the terminal device and a random number (a random number generated by the terminal device).
  • the identification of the first orthogonal sequence is determined based on the random number generated by the terminal device. For details, see formula (1) and the introduction in Table 6 in S401b, which will not be described again here.
  • the identity of the first orthogonal sequence is determined based on the identity of the terminal device. For details, see formula (1) and the introduction in Table 7 in S401b, which will not be described again here.
  • the terminal device can also determine the label i based on the random number generated by itself and its own identification, and determine the first orthogonal sequence based on the determined label i and formula (1). For details, see formula (1 ) will not be repeated here.
  • the network device sends the second message to the terminal device on the first resource.
  • the terminal device receives the second message from the network device on the first resource.
  • the first resource is associated with the first orthogonal sequence
  • the second message includes an identifier of the first orthogonal sequence
  • the second message includes the identifier of the first orthogonal sequence
  • the identifier of the first orthogonal sequence is not included in the second message.
  • the downlink control signaling for scheduling the second message includes the identifier of the first orthogonal sequence.
  • the downlink control signaling is not part of the second message, that is, the second message does not include downlink control signaling.
  • the terminal device After receiving the second message, the terminal device sends a third message to the network device in response to the second message. Correspondingly, the network device receives the third message from the terminal device. For the network device, after receiving the third message, the network device sends a fourth message to the terminal device in response to the third message. Correspondingly, the terminal device receives the fourth message from the network device.
  • the terminal device After details, please refer to the introduction in Figure 3, which will not be described again here.
  • information A is used to determine B.
  • the communication device such as the above-mentioned terminal device or network device determines B based on the information A.
  • information A is used to determine B, which may include the following situations: information A indicates B, or information A includes B.
  • the configuration information 1 is used to determine the number of PRACH repetitions, which may include the following situations: the configuration information 1 indicates the number of PRACH repetitions, or the configuration information 1 includes the number of PRACH repetitions.
  • embodiments of the present application also provide a communication device.
  • the communication device may be the network element in the above method embodiment, or a device including the above network element, or a component that can be used for the network element.
  • the communication device includes corresponding hardware structures and/or software modules for performing each function.
  • the present application can be implemented in the form of hardware or a combination of hardware and computer software. Whether a function is performed by hardware or computer software driving the hardware depends on the specific application and design constraints of the technical solution. Skilled artisans may implement the described functionality using different methods for each specific application, but such implementations should not be considered beyond the scope of this application.
  • FIG. 11 shows a schematic structural diagram of a communication device 1100.
  • the communication device 1100 includes a processing unit 1101, a sending unit 1102 and a receiving unit 1103.
  • the processing unit 1101 is configured to support the terminal device to perform other processing operations that the terminal device needs to perform in FIG. 4 .
  • the sending unit 1102 is used to support the terminal device to perform S401, S403 in Figure 4, and/or other sending operations that the terminal device needs to perform in the embodiment of the present application.
  • the receiving unit 1103 is used to support the terminal device to perform S402, S404 in Figure 4, and/or other receiving operations that the terminal device needs to perform in the embodiment of the present application.
  • the processing unit 1101 is configured to support the network device to perform other processing operations that the network device needs to perform in FIG. 4 .
  • the sending unit 1102 is used to support the network device to perform S402, S404 in Figure 4, and/or other sending operations that the network device needs to perform in the embodiment of the present application.
  • the receiving unit 1103 is used to support the network device to perform S401, S403 in Figure 4, and/or other receiving operations that the network device needs to perform in the embodiment of the present application.
  • the processing unit 1101 is used to support the terminal The device performs other processing operations that the terminal device in Figure 10 needs to perform.
  • the sending unit 1102 is used to support the terminal device to perform S1001 in Figure 10 and/or other sending operations that the terminal device needs to perform in the embodiment of the present application.
  • the receiving unit 1103 is used to support the terminal device to perform S1002 in Figure 10 and/or other receiving operations that the terminal device needs to perform in the embodiment of the present application.
  • the processing unit 1101 is configured to support the network device to perform other processing operations that the network device in Figure 10 needs to perform.
  • the sending unit 1102 is used to support the network device to perform S1002 in Figure 10 and/or other sending operations that the network device needs to perform in the embodiment of the present application.
  • the receiving unit 1103 is used to support the network device to perform S1001 in Figure 10 and/or other receiving operations that the network device needs to perform in the embodiment of the present application.
  • the communication device 1100 may also include a storage unit 1104 for storing program codes and data of the communication device.
  • the data may include but is not limited to original data or intermediate data.
  • the processing unit 1101 may be a processor or a controller, such as a CPU, a general-purpose processor, an application specific integrated circuit (ASIC), a field programmable gate array (field programmable gate array, FPGA), or other Programmable logic devices, transistor logic devices, hardware components, or any combination thereof. It may implement or execute the various illustrative logical blocks, modules, and circuits described in connection with this disclosure.
  • the processor can also be a combination that implements computing functions, such as a combination of one or more microprocessors, a combination of DSP and microprocessors, and so on.
  • the sending unit 1102 may be a communication interface, a transmitter or a sending circuit, etc., where the communication interface is a general term, and in a specific implementation, the communication interface may include multiple interfaces.
  • the receiving unit 1103 may be a communication interface, a receiver or a receiving circuit, etc., where the communication interface is a general term, and in a specific implementation, the communication interface may include multiple interfaces.
  • the sending unit 1102 and the receiving unit 1103 may be physically or logically implemented as the same unit.
  • the storage unit 1104 may be a memory.
  • the processing unit 1101 is a processor
  • the sending unit 1102 and the receiving unit 1103 are communication interfaces
  • the storage unit 1104 is a memory
  • the communication device involved in the embodiment of the present application may be as shown in FIG. 12 .
  • the communication device 1200 includes: a processor 1201 , a communication interface 1202 , and a memory 1203 .
  • the communication device may also include a bus 1204.
  • the communication interface 1202, the processor 1201 and the memory 1203 can be connected to each other through the bus 1204;
  • the bus 1204 can be a peripheral component interconnect standard (peripheral component interconnect, PCI) bus or an extended industry standard architecture (EISA) bus etc.
  • the bus 1204 can be divided into an address bus, a data bus, a control bus, etc. For ease of presentation, only one thick line is used in Figure 12, but it does not mean that there is only one bus or one type of bus.
  • embodiments of the present application also provide a computer program product carrying computer instructions.
  • the computer instructions When the computer instructions are run on a computer, they cause the computer to execute the method described in the above embodiments.
  • embodiments of the present application also provide a computer-readable storage medium that stores computer instructions.
  • the computer instructions When the computer instructions are run on a computer, they cause the computer to execute the method described in the above embodiments.
  • the embodiment of the present application also provides a chip, including: a processing circuit and a transceiver circuit.
  • the processing circuit and the transceiver circuit are used to implement the method introduced in the above embodiment.
  • the processing circuit is used to perform the processing actions in the corresponding method, and the transceiver circuit is used to perform the receiving/transmitting actions in the corresponding method.
  • the above embodiments it may be implemented in whole or in part by software, hardware, firmware, or any combination thereof.
  • software when When implemented using software, it may be implemented in whole or in part in the form of a computer program product.
  • the computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on a computer, the processes or functions described in the embodiments of the present application are generated in whole or in part.
  • the computer may be a general-purpose computer, a special-purpose computer, a computer network, or other programmable device.
  • the computer instructions may be stored in or transmitted from one computer-readable storage medium to another, e.g., the computer instructions may be transferred from a website, computer, server, or data center Transmission to another website, computer, server or data center through wired (such as coaxial cable, optical fiber, digital subscriber line (DSL)) or wireless (such as infrared, wireless, microwave, etc.) means.
  • the computer-readable storage medium may be any available medium that can be accessed by a computer or a data storage device such as a server or data center integrated with one or more available media.
  • the available media may be magnetic media (eg, floppy disk, hard disk, tape), optical media (eg, digital video disc (DVD)), or semiconductor media (eg, solid state drive (SSD)) wait.
  • the disclosed systems, devices and methods can be implemented in other ways.
  • the device embodiments described above are only illustrative.
  • the division of modules is only a logical function division. In actual implementation, there may be other division methods.
  • multiple modules or components may be combined or can be integrated into another system, or some features can be ignored, or not implemented.
  • the coupling or direct coupling or communication connection between each other shown or discussed may be through some interfaces, indirect coupling or communication connection of devices or modules, and may be in electrical or other forms.
  • the units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place, or they may be distributed to multiple devices. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of this embodiment.
  • the present application can be implemented by means of software plus necessary general hardware. Of course, it can also be implemented by hardware, but in many cases the former is a better implementation. . Based on this understanding, the essence or the contribution part of the technical solution of the present application can be embodied in the form of a software product.
  • the computer software product is stored in a readable storage medium, such as a computer floppy disk, a hard disk or an optical disk. etc., including several instructions to cause a computer device (which may be a personal computer, a server, or a network device, etc.) to execute the methods described in various embodiments of the present application.

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Abstract

La présente demande se rapporte au domaine technique des communications sans fil. L'invention concerne un procédé et un appareil de communication, qui peuvent améliorer le taux de réussite d'un accès aléatoire. Le procédé comprend les étapes suivantes : un dispositif terminal envoie une première séquence à un dispositif de réseau au moyen d'un canal d'accès aléatoire physique (PRACH), la première séquence étant associée à un premier signal de référence et la première séquence pouvant être une première séquence orthogonale ou pouvant être une première séquence de préambule ; et le dispositif terminal reçoit un deuxième message en provenance d'un dispositif de réseau, un faisceau d'envoi du deuxième message étant déterminé sur la base d'un faisceau d'envoi du premier signal de référence et le faisceau d'envoi du premier signal de référence étant un faisceau qui est utilisé lorsque le dispositif de réseau envoie le premier signal de référence.
PCT/CN2023/083498 2022-04-02 2023-03-23 Procédé et appareil de communication WO2023185652A1 (fr)

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CN202210349663 2022-04-02
CN202210556559.7 2022-05-20
CN202210556559.7A CN116938424A (zh) 2022-04-02 2022-05-20 通信方法及装置

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