WO2019029696A1 - Procédé d'émission de signal et procédé et appareil de réception - Google Patents

Procédé d'émission de signal et procédé et appareil de réception Download PDF

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Publication number
WO2019029696A1
WO2019029696A1 PCT/CN2018/099934 CN2018099934W WO2019029696A1 WO 2019029696 A1 WO2019029696 A1 WO 2019029696A1 CN 2018099934 W CN2018099934 W CN 2018099934W WO 2019029696 A1 WO2019029696 A1 WO 2019029696A1
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WIPO (PCT)
Prior art keywords
signal
uplink carrier
terminal device
uplink
indication information
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PCT/CN2018/099934
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English (en)
Chinese (zh)
Inventor
郭志恒
谢信乾
许斌
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华为技术有限公司
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Publication of WO2019029696A1 publication Critical patent/WO2019029696A1/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/06—Reselecting a communication resource in the serving access point
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/24—Reselection being triggered by specific parameters
    • H04W36/26—Reselection being triggered by specific parameters by agreed or negotiated communication parameters
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W74/00—Wireless channel access
    • H04W74/08—Non-scheduled access, e.g. ALOHA
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W74/00—Wireless channel access
    • H04W74/08—Non-scheduled access, e.g. ALOHA
    • H04W74/0833—Random access procedures, e.g. with 4-step access
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/34—Reselection control
    • H04W36/36—Reselection control by user or terminal equipment
    • H04W36/362—Conditional handover

Definitions

  • the embodiments of the present invention relate to the field of communications technologies, and in particular, to a signal sending method, a receiving method, and a device.
  • the New Radio Interface (NR) system and Long Term Evolution (5th-Generation, 5G) can be deployed simultaneously in the frequency band below 6 GHz.
  • LTE Long Term Evolution
  • the NR system is most likely to be deployed on the 3.5 GHz frequency, but the uplink coverage of the system on this frequency cannot match the downlink coverage, which limits the uplink coverage of the NR system.
  • the LTE system is deployed at 1.8 GHz. Since the 1.8 GHz band has lower channel fading and better coverage, in order to enhance the uplink coverage of the NR system, the uplink of the NR system can also be deployed in the uplink frequency band of the LTE system, that is, the NR system and the LTE system share 1.8 GHz. Upstream frequency band.
  • the uplink of the NR system can also be deployed on a dedicated uplink frequency band.
  • the dedicated uplink frequency band does not deploy an LTE system or other communication system, and the uplink frequency band can be referred to as an increased uplink (UL) carrier.
  • the network device configures a plurality of resources for the terminal device to perform random access, and the resource may be referred to as a physical random access channel (PRACH) resource.
  • PRACH physical random access channel
  • the terminal device requires random access, one of the configured multiple PRACH resources is selected to send a random preamble sequence (Preamble).
  • a terminal device can only transmit a random preamble sequence on one uplink carrier during a random access procedure.
  • the uplink carrier is heavily loaded or the channel conditions are poor, the random access success rate of the terminal device is low.
  • the embodiment of the present application provides a signal sending method, a receiving method, and a device, which improve the success rate of random access.
  • the embodiment of the present application provides a method for transmitting a signal, where the method includes: the terminal device sends a first signal to the network device on the first uplink carrier. If the first parameter determined by the terminal device meets the preset condition, the terminal device sends a second signal to the network device on the second uplink carrier, and stops sending the first signal to the network device on the first uplink carrier, where The parameter includes a first power for the terminal device to transmit the first signal on the first uplink carrier and/or a first number of times the terminal device has transmitted the first signal on the first uplink carrier.
  • the terminal device may switch the uplink carrier by itself. Sending a random access sequence improves the success rate of random access.
  • the first parameter includes a first power that is used by the terminal device to send the first signal on the first uplink carrier
  • the first parameter determined by the terminal device is met.
  • the preset condition includes: the first power is greater than the first preset value.
  • the first parameter determined by the terminal device is met.
  • the preset condition includes: the first number is equal to the second preset value.
  • the method before the terminal device sends the second signal to the network device on the second uplink carrier, the method further includes: receiving, by the terminal device, the second indication information sent by the network device, The second indication information indicates that the terminal device transmits the first initial power of the first signal on the first uplink carrier and the second initial power of the second signal on the second uplink carrier.
  • the terminal device determines, according to the second indication information, an initial power for transmitting the second signal on the second uplink carrier.
  • the terminal device may determine, according to the second indication information sent by the network device, the initial power for transmitting the second signal.
  • the method before the terminal device sends the second signal to the network device on the second uplink carrier, the method further includes: determining, by the terminal device, the sending on the second uplink carrier The initial power of the second signal is equal to the power of the last signal transmitted by the terminal device on the first uplink carrier.
  • the terminal device sets the power of the last transmission of the first signal to the initial power for transmitting the second signal.
  • the method before the terminal device sends the second signal to the network device on the second uplink carrier, the method further includes: determining, by the terminal device, the first sending count value, where A transmit count value of 1 or a value of the first number plus one. The terminal device determines an initial power for transmitting the second signal on the second uplink carrier according to the first transmission count value.
  • the terminal device may determine the initial power for transmitting the second signal according to the first transmission count value.
  • the method before the terminal device sends the first signal to the network device on the first uplink carrier, the method further includes: receiving, by the terminal device, the first indication information sent by the network device, The first indication information indicates a first maximum number of transmissions of the first signal by the terminal device on the first uplink carrier and a second maximum number of transmissions of the second signal on the second uplink carrier.
  • the terminal device may determine, according to the first maximum number of transmissions included in the first indication information, whether the first parameter meets a preset condition, so as to switch the uplink carrier transmission when the preset condition is met.
  • the random access sequence improves the random access success rate.
  • the method may further include: determining, by the terminal device, sending the second uplink carrier The initial number of times the signal was sent.
  • the method may further include: determining, by the terminal device, the first uplink carrier.
  • the terminal device sends the second signal to the network device on the second uplink carrier, and stops before sending the first signal to the network device on the first uplink carrier
  • the method may further include: determining, by the terminal device, the second uplink carrier according to the association relationship between the first uplink carrier and the second uplink carrier.
  • the terminal device may determine the second uplink carrier according to the association relationship between the first uplink carrier and the second uplink carrier, and improve the rationality and success rate of the carrier selection after the handover.
  • the method may further include: when the terminal device changes from uplink out-of-synchronization to uplink synchronization, the terminal device sends the third uplink carrier.
  • the third signal may be generated by the terminal device.
  • the terminal device improves the success rate of the random access after the terminal device resynchronizes by transmitting the third signal on the third uplink carrier.
  • the embodiment of the present application provides a method for receiving a signal, where the method includes: the network device sends first indication information and/or second indication information to the terminal device, where the first indication information indicates that the terminal device is in the first uplink. Transmitting a first maximum number of transmissions of the first signal on the carrier and transmitting a second maximum number of transmissions of the second signal on the second uplink carrier, the second indication information indicating that the terminal device sends the first signal on the first uplink carrier An initial power and a second initial power of the second signal transmitted on the second uplink carrier.
  • the network device receives the first signal sent by the terminal device on the first uplink carrier, or the second signal sent by the terminal device on the second uplink carrier.
  • the network device may send the third indication information to the terminal device.
  • the third indication information indicates that the terminal device transmits the first maximum power of the first signal on the first uplink carrier and the second maximum power of the second signal on the second uplink carrier.
  • the network device may send the fourth indication information to the terminal device, where the fourth indication information indicates an association relationship or the association between the first uplink carrier and the second uplink carrier. The conditions that the relationship needs to meet.
  • an embodiment of the present application provides a terminal device, including a sending module and a processing module. And a sending module, configured to send the first signal to the network device on the first uplink carrier.
  • the sending module is configured to send a second signal to the network device on the second uplink carrier, and stop sending the first signal to the network device on the first uplink carrier, where the first parameter determined by the processing module meets the preset condition,
  • the first parameter includes a first power used by the sending module to send the first signal on the first uplink carrier and/or a first time that the sending module has sent the first signal on the first uplink carrier.
  • the method includes: the first power is greater than the first preset value.
  • the first parameter includes the first time that the sending module sends the first signal on the first uplink carrier, the first parameter meets the preset condition, Including: the first number is equal to the second preset value.
  • the receiving module is further included.
  • the receiving module is configured to receive the second indication information sent by the network device, where the second indication information indicates that the sending module sends the first initial power of the first signal on the first uplink carrier and the second signal on the second uplink carrier. Second initial power.
  • the processing module is further configured to determine, according to the second indication information, an initial power for transmitting the second signal on the second uplink carrier.
  • the processing module is further configured to: determine that an initial power for transmitting the second signal on the second uplink carrier is equal to a last time that the sending module is on the first uplink carrier The power of the first signal is sent.
  • the processing module is further configured to: determine a first sending count value, where the first sending count value is 1 or the value of the first number of times is plus 1 .
  • An initial power for transmitting the second signal on the second uplink carrier is determined according to the first transmission count value.
  • the receiving module is further included.
  • the receiving module is configured to: receive first indication information sent by the network device, where the first indication information indicates that the sending module sends the first maximum number of transmissions of the first signal on the first uplink carrier and the second signal on the second uplink carrier The second maximum number of transmissions.
  • an embodiment of the present application provides a network device, including a sending module and a receiving module.
  • a sending module configured to send the first indication information and/or the second indication information to the terminal device, where the first indication information indicates the first maximum number of transmissions of the first signal sent by the terminal device on the first uplink carrier, and the second uplink Sending a second maximum number of transmissions of the second signal on the carrier, the second indication information indicating that the terminal device sends the first initial power of the first signal on the first uplink carrier and the second signal that transmits the second signal on the second uplink carrier Initial power.
  • the receiving module is configured to receive a first signal sent by the terminal device on the first uplink carrier, or a second signal sent by the terminal device on the second uplink carrier.
  • an embodiment of the present application provides a terminal device, where the terminal device includes a processor, a memory, and a transceiver, where the memory is used to store instructions, the transceiver is used to communicate with other devices, and the processor is configured to execute instructions stored in the memory. To cause the terminal device to perform the method of the above first aspect.
  • an embodiment of the present application provides a network device, where the network device includes a processor, a memory, and a transceiver, where the memory is used to store instructions, the transceiver is used to communicate with other devices, and the processor is configured to execute instructions stored in the memory. To cause the terminal device to perform the method of the second aspect described above.
  • the frequency of the first uplink carrier is different from the frequency of the second uplink carrier
  • the first signal and the second signal each comprise a random preamble sequence.
  • an embodiment of the present application provides a program, when executed by a processor, is configured to perform the method of the foregoing first aspect.
  • an embodiment of the present application provides a program product, such as a computer readable storage medium, including the program of the seventh aspect.
  • the embodiment of the present application provides a computer readable storage medium, where the computer readable storage medium stores instructions, when executed on a computer, causing the computer to execute the method of the first aspect.
  • the embodiment of the present application provides a program, when executed by a processor, is used to execute the method of the second aspect.
  • an embodiment of the present application provides a program product, such as a computer readable storage medium, including the program of the tenth aspect.
  • the embodiment of the present application provides a computer readable storage medium, where the computer readable storage medium stores instructions that, when run on a computer, cause the computer to perform the method of the second aspect.
  • the embodiment of the present application provides a signal sending method, a receiving method, and a device.
  • the terminal device is configured with at least two uplink carriers.
  • the uplink carrier can be switched, and the uplink signal is sent on another uplink carrier, thereby improving the success rate of transmitting the uplink signal, and then in a random process.
  • the random access success rate is improved.
  • FIG. 1 is a network architecture diagram applicable to an embodiment of the present application
  • FIG. 2A is a schematic structural diagram of a carrier configuration applicable to an embodiment of the present application.
  • 2B is another schematic structural diagram of a carrier configuration applicable to an embodiment of the present application.
  • FIG. 3 is a flowchart of a method for sending a signal according to an embodiment of the present application
  • FIG. 4 is a flowchart of a method for receiving a signal according to an embodiment of the present application.
  • FIG. 5 is a schematic structural diagram of a terminal device according to Embodiment 1 of the present application.
  • FIG. 6 is a schematic structural diagram of a network device according to Embodiment 1 of the present application.
  • FIG. 7 is a schematic structural diagram of a terminal device according to Embodiment 2 of the present application.
  • FIG. 8 is a schematic structural diagram of a network device according to Embodiment 2 of the present application.
  • the method for transmitting and receiving the signal provided by the embodiment of the present application can be applied to a 5G communication system and other communication systems.
  • the number of uplink carriers configured by the network device in the communication system for the terminal device is at least two, and the frequencies of the at least two uplink carriers are different.
  • the at least two uplink carriers may belong to the same cell or belong to different cells.
  • FIG. 1 is a network architecture diagram applicable to an embodiment of the present application. As shown in FIG. 1, the system includes a network device and a terminal device, and the network device has a certain signal coverage. Within the signal coverage, the network device is configured with an uplink carrier and a downlink carrier.
  • the terminal device can send data and control signaling to the network device by using the time-frequency resource of the uplink carrier.
  • the network device can send data and control signaling to the terminal device through the time-frequency resource of the downlink carrier.
  • carrier F1 is an uplink carrier and a downlink carrier
  • carrier F2 is an uplink carrier
  • carrier F3 is an uplink carrier.
  • the frequency of the carrier F2 and the carrier F3 is lower than the frequency of the carrier F1, and the carrier F2 and the carrier F3 have lower channel fading and better coverage.
  • the carrier F1 may be an NR-band carrier, and the frequency band may be 3.5 GHz.
  • Carrier F2 can be an LTE band carrier, and the frequency band can be 1.8 GHz.
  • Carrier F3 may be an increased uplink (SUL) carrier, and the SUL carrier does not deploy LTE or other communication systems.
  • SUL increased uplink
  • FIG. 2A is a schematic structural diagram of a carrier configuration applicable to an embodiment of the present application. As shown in FIG. 2A, it is an LTE and NR uplink sharing scenario.
  • the network device configures two uplink carriers for the terminal device, including the NR carrier and the LTE uplink carrier.
  • the NR can work in a Time Division Duplexing (TDD) mode, and the NR carrier can be a TDD carrier, and the frequency F3 can be 3.5 GHz.
  • LTE can work in Frequency Division Duplexing (FDD) mode.
  • the LTE uplink carrier can be an FDD carrier, and its frequency F1 can be 1.75 GHz.
  • the uplink carrier shared by NR and LTE is an LTE uplink carrier.
  • the terminal device can perform uplink communication and downlink communication with the NR network device through the NR carrier, and can perform uplink communication with the NR network device through the LTE uplink carrier.
  • D represents a downlink slot
  • U represents an uplink slot
  • numerals 0-9 represent a subframe number.
  • FIG. 2B is another schematic structural diagram of a carrier configuration applicable to an embodiment of the present application. As shown in FIG. 2B, it is a scenario of an NR carrier and at least one SUL carrier.
  • the network device configures three uplink carriers for the terminal device, including an NR carrier, a SUL 1 carrier, and a SUL 2 carrier.
  • the NR can work in the TDD mode
  • the NR carrier can be a TDD carrier
  • the frequency F3 can be 3.5 GHz.
  • the terminal device can perform uplink communication and downlink communication with the NR network device through the NR carrier, and can perform uplink communication with the NR network device through the SUL 1 carrier or the SUL 2 carrier.
  • D represents a downlink slot
  • U represents an uplink slot
  • numerals 0-9 represent a subframe number.
  • the method for transmitting and receiving a signal provided by the embodiment of the present application is to solve the problem that the terminal device can only send a random preamble sequence on one uplink carrier in the random access process in the prior art, resulting in a low success rate of random access.
  • Technical problem is to solve the problem that the terminal device can only send a random preamble sequence on one uplink carrier in the random access process in the prior art, resulting in a low success rate of random access.
  • the terminal device in the embodiment of the present application may be a wireless terminal such as a mobile phone or a tablet computer, and the wireless terminal includes a device for providing voice and/or data services to the user, and the terminal device may also be a handheld device with an wireless connection function and an in-vehicle device.
  • the embodiment of the present application is not limited to a device, a computing device, and a user equipment UE, a mobile station (MS), and a terminal.
  • the network device involved in the embodiment of the present application may be any device that manages wireless network resources in any of the 5G communication system and other communication systems.
  • the network device may be a 5G base station (g Node B, gNB) in a 5G communication system, a NeXt Node (NX) in a 5G communication system, and a Transmit and receive point (TRP).
  • g Node B g Node B
  • NX NeXt Node
  • TRP Transmit and receive point
  • the embodiment is not limited.
  • FIG. 3 is a flowchart of a method for transmitting a signal according to an embodiment of the present application.
  • the execution entity may be a terminal device.
  • the method for sending a signal provided in this embodiment may include:
  • the terminal device sends a first signal to the network device on the first uplink carrier.
  • the first signal may comprise a random preamble sequence.
  • the network device configures at least two uplink carriers for the terminal device.
  • the first uplink carrier indicates an uplink carrier before the terminal device switches itself, and may be any one of at least two uplink carriers configured by the network device for the terminal device.
  • the first signal is an uplink signal that is sent by the terminal device on the first uplink carrier. The specific information included in the first signal is not limited in this embodiment.
  • the terminal device If the first parameter determined by the terminal device meets the preset condition, the terminal device sends the second signal to the network device on the second uplink carrier, and stops sending the first signal to the network device on the first uplink carrier.
  • the first parameter may include a first power for the terminal device to send the first signal on the first uplink carrier and/or a first time that the terminal device has sent the first signal on the first uplink carrier, the first uplink
  • the frequency of the carrier is different from the frequency of the second uplink carrier, and the second signal may include a random preamble sequence.
  • the second uplink carrier indicates an uplink carrier that is self-switched by the terminal device, and may be any one of the at least two uplink carriers configured by the network device except the first uplink carrier.
  • the second signal is an uplink signal that is sent by the terminal device on the second uplink carrier. The specific information included in the second signal is not limited in this embodiment.
  • the terminal device When the terminal device transmits the first power of the first signal on the first uplink carrier and/or the first time that the terminal device has sent the first signal on the first uplink carrier meets a preset condition, the terminal device is at the first Transmitting the first signal on the uplink carrier to transmitting the second signal on the second uplink carrier, the first signal and the second signal each comprise a random preamble sequence.
  • the terminal device in the random access process, when the power of the first signal transmitted by the terminal device on the first uplink carrier and/or the number of times of transmission has met a certain condition, the terminal device may switch the uplink by itself.
  • the carrier transmits a random access sequence.
  • the random access sequence can be sent on only one uplink carrier, and the method for transmitting the signal provided in this embodiment improves the success rate of random access.
  • the first parameter determined by the terminal device meets the preset Conditions can include:
  • the first power is greater than the first preset value, and the first preset value is a positive number.
  • the terminal device determines the power to be used for transmitting the first signal before transmitting the first signal on the first uplink carrier.
  • the worse the uplink channel condition and the greater the interference the larger the power value.
  • the power of the first signal determined by the current terminal device may be increased.
  • the terminal device can switch to the second uplink carrier to send the second signal, thereby improving the signal transmission success rate, thereby improving the random access success in the random access process. rate.
  • the first preset value may be a value preset in the terminal device.
  • the first preset value may be that the network device is configured for the terminal device.
  • the terminal device may receive the third indication information sent by the network device, where the third indication information indicates that the terminal device sends the first signal on the first uplink carrier.
  • the first preset value is the first maximum power.
  • the first maximum power and the second maximum power may be the same or different.
  • the third indication information may include only one maximum power.
  • the first parameter determined by the terminal device meets the preset Conditions can include:
  • the first number is equal to the second preset value, and the second preset value is a positive integer.
  • the terminal device may attempt to send the first signal multiple times on the first uplink carrier.
  • the terminal device may continue to send the first signal on the first uplink carrier.
  • the terminal device does not send unrestrictedly.
  • the terminal device can switch to the second uplink carrier to send the second signal, thereby improving the signal transmission success rate, thereby improving random access during the random access process. Success rate.
  • the second preset value may be a value preset in the terminal device.
  • the second preset value may be that the network device is configured for the terminal device.
  • the terminal device may receive the first indication information sent by the network device, where the first indication information indicates that the terminal device sends the first signal on the first uplink carrier.
  • the second preset value is the first maximum number of transmissions.
  • the first maximum number of transmissions may be the same as or different from the second maximum number of transmissions.
  • the first indication information may include only one maximum number of transmissions.
  • the first parameter includes a first power used by the terminal device to send the first signal on the first uplink carrier, and the terminal device is sent on the first uplink carrier
  • the first time of the signal, the first parameter determined by the terminal device meets the preset condition and may include:
  • the first power is greater than the first preset value, and the first number of times is equal to the second preset value.
  • the foregoing first preset value and the second preset value may be randomly configured by the base station.
  • the first preset value may be a value that does not exceed the maximum transmit power of the terminal.
  • the second preset value can be any positive integer.
  • the method for sending the signal provided in this embodiment, S102, before the terminal device sends the second signal to the network device on the second uplink carrier may further include:
  • the terminal device determines an initial power for transmitting the second signal on the second uplink carrier.
  • the initial power of the second signal is the power of the terminal device to send the second signal for the first time on the second uplink carrier.
  • the initial power of the second signal may be a value preset in the terminal device. This embodiment does not limit the value of the value.
  • the determining, by the terminal device, the initial power used to send the second signal on the second uplink carrier may include:
  • the terminal device receives the second indication information sent by the network device, where the second indication information indicates that the terminal device sends the first initial power of the first signal on the first uplink carrier and the second initial transmission of the second signal on the second uplink carrier. power.
  • the terminal device determines, according to the second indication information, an initial power for transmitting the second signal on the second uplink carrier.
  • the second indication information may have multiple implementation manners.
  • the second indication information includes a first initial power that the terminal device sends the first signal on the first uplink carrier and a second initial power that sends the second signal on the second uplink carrier.
  • the terminal device may determine, according to the second indication information, that the initial power for transmitting the second signal on the second uplink carrier is the second initial power.
  • the first initial power and the second initial power may be the same or different.
  • the second indication information may include only one initial power.
  • the second indication information may include a first related parameter that is used by the terminal device to determine an initial power for transmitting the first signal on the first uplink carrier, and configured to determine, by the terminal device, to send the second signal on the second uplink carrier.
  • the second relevant parameter of the initial power This embodiment does not limit the implementation manner of the related parameters, and may be used by the existing network device to send the terminal device any parameter for determining the transmit power of the terminal device.
  • the first related parameter and the second related parameter may be the same or different.
  • the second indication information may include only one set of related parameters.
  • the relevant parameters may include the initial reception target power of the sequence (identified as preambleInitialReceivedTargetPower).
  • the terminal device calculates the sequence receiving target power (identified as PREAMBLE_RECEIVED_TARGET_POWER) according to the preambleInitialReceivedTargetPower using the formula (1). Then, according to the path loss value, the initial power of transmitting the first signal on the first uplink carrier or the initial power of transmitting the second signal on the second uplink carrier is calculated by using formula (2).
  • PREAMBLE_RECEIVED_TARGET_POWER preambleInitialReceivedTargetPower+DE LTA_PREAMBLE Formula (1)
  • DELTA_PREAMBLE is a parameter predetermined by the terminal device. It can be preset or it can be notified to the terminal device by the network device.
  • the Transmit_Power indicates the initial power of the first signal or the second signal sent by the terminal device.
  • the PL indicates the path loss value between the terminal device and the network device.
  • the path loss value may be obtained by the terminal device by measurement, or may be pre-configured by the network device.
  • the determining, by the terminal device, the initial power used to send the second signal on the second uplink carrier may include:
  • the terminal device determines that the initial power for transmitting the second signal on the second uplink carrier is equal to the power of the last signal transmitted by the terminal device on the first uplink carrier.
  • the determining, by the terminal device, the initial power used to send the second signal on the second uplink carrier may include:
  • the terminal device determines a first transmission count value, wherein the first transmission count value is 1 or the value of the first number of times is incremented by one.
  • the terminal device determines an initial power for transmitting the second signal on the second uplink carrier according to the first transmission count value.
  • the relevant parameters include the initial reception target power (preambleInitialReceivedTargetPower).
  • the terminal device calculates the sequence receiving target power (identified as PREAMBLE_RECEIVED_TARGET_POWER) according to the preambleInitialReceivedTargetPower using formula (3). Then, according to the path loss value, the initial power of transmitting the first signal on the first uplink carrier or the initial power of transmitting the second signal on the second uplink carrier is calculated by using the above formula (2).
  • PREAMBLE_RECEIVED_TARGET_POWER preambleInitialReceivedTargetPower+DELTA_PREAMBLE+(PREAMBLE_TRANSMISSION_COUNTER–1)*powerRampingStep (3)
  • PREAMBLE_TRANSMISSION_COUNTER indicates the send count value.
  • the powerRampingStep represents the power climb step value, which is a predetermined parameter for the terminal device. It can be preset or it can be notified to the terminal device by the network device.
  • the method for sending the signal provided in this embodiment, S102, before the terminal device sends the second signal to the network device on the second uplink carrier may further include:
  • the terminal device determines an initial number of transmissions of the second signal transmitted on the second uplink carrier.
  • the initial number of transmissions of the second signal is an initial value of the number of times the terminal device has transmitted the second signal on the second uplink carrier.
  • the initial number of times the terminal device sends the second signal on the second uplink carrier affects the number of times the terminal device can also send the second signal on the second uplink carrier.
  • the initial number of transmissions can be 0 or greater than 0.
  • the initial number of transmissions of the second signal sent by the terminal device on the second uplink carrier is 0.
  • the terminal device determines the initial number of times that the second signal is sent on the second uplink carrier, which may include:
  • the terminal device determines to send on the second uplink carrier.
  • the initial number of transmissions of the second signal is the first number of times.
  • the method for sending a signal provided in this embodiment, where the terminal device sends the first signal to the network device on the first uplink carrier may further include:
  • the terminal device determines the first uplink carrier.
  • the network device is configured with at least two uplink carriers for the terminal device, and therefore, the terminal device needs to determine the first uplink carrier among the at least two uplink carriers.
  • the terminal device may determine, according to a priority of the at least two uplink carriers, the first uplink carrier, where the priority device may be configured by the terminal device or configured by the network device. Taking FIG. 2 as an example, if the priority of the NR carrier is higher than the priority of the LTE uplink carrier, the NR carrier may be determined to be the first uplink carrier.
  • the terminal device may determine the first uplink carrier according to the measurement result on the downlink carrier.
  • the NR carrier is an uplink carrier and a downlink carrier, so the terminal device can perform downlink measurement on the NR carrier.
  • the terminal device may determine that the NR carrier is the first uplink carrier.
  • the terminal device may determine that the LTE uplink carrier is the first uplink carrier.
  • the value of the preset threshold is not limited in this embodiment.
  • the method for sending a signal provided by this embodiment, S102 the terminal device sends a second signal to the network device on the second uplink carrier, and stops before sending the first signal to the network device on the first uplink carrier, Can include:
  • the terminal device determines the second uplink carrier according to the association relationship between the first uplink carrier and the second uplink carrier.
  • the manner in which the first uplink carrier and the second uplink carrier are associated with each other and the manner in which the terminal device acquires the association relationship are not limited in this embodiment.
  • the relationship between the association relationship or the association relationship may be preset in the terminal device.
  • the condition that the association relationship needs to be met may be that a first carrier with a high frequency is associated with a second carrier that is lower than the first carrier frequency.
  • the network device configures three uplink carriers for the terminal device, and the frequencies are F1, F2, and F3, respectively, and F1>F2>F3.
  • the association relationship determined by the terminal device may be: F1 is associated with F2 and F3, and F2 is associated with F3.
  • the first uplink carrier is F1
  • the second uplink carrier determined by the terminal device according to the association relationship may be F2 or F3.
  • the second uplink carrier determined by the terminal device according to the association relationship may be F3.
  • each second carrier may also be configured with a priority, for example, the priority decreases according to the carrier frequency from high to low.
  • F1 is associated with F2 and F3. Since F2>F3, the priority of F2 is higher than the priority of F3.
  • the second uplink carrier determined by the terminal device according to the association relationship may be F2.
  • the association between the first uplink carrier and the second uplink carrier may be that the network device is pre-configured to the terminal device.
  • the terminal device may receive the fourth indication information sent by the network device, where the fourth indication information indicates the association relationship between the first uplink carrier and the second uplink carrier. Or the condition that the relationship needs to be met.
  • the network device configures three uplink carriers for the terminal device, and the frequencies are F1, F2, and F3, respectively, and F1>F2>F3.
  • the fourth indication information may include that F1 is associated with F3, and F2 is associated with F3.
  • the second uplink carrier determined by the terminal device according to the association relationship may be F3.
  • the fourth indication information may include a condition that the association relationship needs to satisfy. The principle is similar to the above description and will not be described here.
  • the sending method of the signal provided in this embodiment may further include: if the terminal device is out of synchronization, the method may further include:
  • the terminal device When the terminal device changes from uplink out-of-synchronization to uplink synchronization, the terminal device transmits a third signal on the third uplink carrier.
  • the third signal refers to an uplink signal sent by the terminal device on the third uplink carrier, and the third signal may include a random preamble sequence. This embodiment does not limit other information included in the third signal.
  • the third uplink carrier may be an uplink carrier that sends the uplink signal of the terminal device before the uplink out-of-synchronization.
  • the third uplink carrier may be the second uplink carrier.
  • the uplink signal is out of synchronization, and the uplink signal is sent by the switching carrier, so that the success rate of the transmitted signal can be improved, and the random access success rate is improved in the random access process.
  • the third uplink carrier if the network device configures two uplink carriers for the terminal device, and the uplink device that sends the uplink signal before the uplink out-of-synchronization is the second uplink carrier, the The three uplink carriers may be the first uplink carrier.
  • the terminal device has switched over the uplink carrier, and the first uplink carrier is switched to the second uplink carrier, the uplink signal is out of synchronization, and the uplink signal is transmitted by switching the uplink carrier again to improve the success of the transmission signal. Rate, and then improve the random access success rate in the random access process.
  • the third uplink carrier may be any uplink carrier other than the first uplink carrier and the second uplink carrier of the at least three uplink carriers.
  • the uplink signal is out of synchronization, and the uplink signal is transmitted to the uplink carrier that has not been switched before, so that the success rate of the transmitted signal can be improved, and the random access success rate is improved in the random access process.
  • the embodiment provides a method for transmitting a signal, including: the terminal device sends a first signal to the network device on the first uplink carrier, where the first parameter determined by the terminal device meets a preset condition, the terminal device is in the first Sending a second signal to the network device on the second uplink carrier, and stopping sending the first signal to the network device on the first uplink carrier.
  • the terminal device when the terminal device is configured with at least two uplink carriers, when the terminal device sends an uplink signal on an uplink carrier that meets certain conditions, the uplink carrier may be switched and sent on another uplink carrier.
  • the uplink signal improves the success rate of transmitting the uplink signal, thereby improving the random access success rate in the random process.
  • FIG. 4 is a flowchart of a method for receiving a signal according to an embodiment of the present application.
  • the execution entity may be a network device.
  • the method for receiving a signal provided by this embodiment may include:
  • the network device sends the first indication information and/or the second indication information to the terminal device.
  • the first indication information indicates a first maximum transmission number of the first signal sent by the terminal device on the first uplink carrier and a second maximum transmission frequency of the second signal on the second uplink carrier, where the second indication information indicates
  • the terminal device transmits a first initial power of the first signal on the first uplink carrier and a second initial power of the second signal on the second uplink carrier.
  • the frequency of the first uplink carrier is different from the frequency of the second uplink carrier, and the first signal and the second signal both comprise a random preamble sequence.
  • the network device configures at least two uplink carriers for the terminal device.
  • the first uplink carrier indicates an uplink carrier before the terminal device switches itself, and may be any one of at least two uplink carriers configured by the network device for the terminal device.
  • the second uplink carrier indicates an uplink carrier that is self-switched by the terminal device, and may be any one of the at least two uplink carriers configured by the network device except the first uplink carrier.
  • the frequency of the first uplink carrier is different from the frequency of the second uplink carrier.
  • the network device sends the first indication information and/or the second indication information to the terminal device.
  • the first indication information actually indicates the maximum number of times the terminal device sends the uplink signal on all uplink carriers configured by the network device.
  • the second indication information actually indicates the initial power of the uplink signal sent by the terminal device on all uplink carriers configured by the network device.
  • the first indication information is used to provide a basis for determining, by the terminal device, the second uplink carrier.
  • the second indication information is used to determine, for the terminal device, the initial power for transmitting the second signal on the second uplink carrier.
  • first indication information and the second indication information refer to the embodiment shown in FIG. 3 above, and the principle is similar, and details are not described herein again.
  • the network device receives a first signal sent by the terminal device on the first uplink carrier, or a second signal sent by the terminal device on the second uplink carrier.
  • an uplink signal is usually sent only on one uplink carrier. If the terminal device does not switch the uplink carrier, the terminal device transmits the first signal on the first uplink carrier. Correspondingly, the network device receives the first signal sent by the terminal device on the first uplink carrier. If the terminal device switches the uplink carrier, the terminal device transmits the second signal on the second uplink carrier. Correspondingly, the network device receives the second signal sent by the terminal device on the second uplink carrier.
  • the network device has a certain signal coverage, and there may be more than one terminal device that communicates with the network device within the signal coverage. Therefore, for a case where a plurality of terminal devices communicate with the network device, the network device may receive an uplink signal sent by each terminal device on the first uplink carrier and on the second uplink carrier.
  • the network device may send the third indication information to the terminal device.
  • the third indication information indicates that the terminal device sends the first maximum power of the first signal on the first uplink carrier and the second maximum power of the second signal on the second uplink carrier.
  • the network device may send the fourth indication information to the terminal device, where the fourth indication information indicates an association relationship between the first uplink carrier and the second uplink carrier or a condition that the association relationship needs to be met.
  • the terminal device may switch the uplink carrier to send an uplink signal, and the network device may receive the uplink signal sent by the terminal device on the first uplink carrier or on the second uplink carrier. .
  • the terminal device can only send the uplink signal on one uplink carrier, and the method for receiving the signal provided in this embodiment improves the success rate of the random access.
  • FIG. 5 is a schematic structural diagram of a terminal device according to Embodiment 1 of the present application.
  • the terminal device provided by the embodiment of the present application is configured to execute a method for transmitting a signal provided by the embodiment shown in FIG.
  • the terminal device provided by the embodiment of the present application may include:
  • the sending module 11 is configured to send the first signal to the network device on the first uplink carrier.
  • the sending module 11 is configured to send a second signal to the network device on the second uplink carrier, and stop sending the first message to the network device on the first uplink carrier, where the first parameter determined by the processing module 12 meets the preset condition.
  • a signal where the first parameter includes a first power used by the transmitting module 11 to transmit the first signal on the first uplink carrier and/or a first time that the transmitting module 11 has sent the first signal on the first uplink carrier,
  • the frequency of the first uplink carrier is different from the frequency of the second uplink carrier, and the first signal and the second signal both comprise a random preamble sequence.
  • the first parameter includes a first power used by the sending module 11 to send the first signal on the first uplink carrier
  • the first parameter meets a preset condition, including:
  • the first power is greater than the first preset value.
  • the first parameter includes the first time that the sending module 11 has sent the first signal on the first uplink carrier, the first parameter meets a preset condition, including:
  • the first number of times is equal to the second preset value.
  • the receiving module 13 is further included.
  • the receiving module 13 is configured to receive second indication information that is sent by the network device, where the second indication information indicates that the sending module 11 sends the first initial power of the first signal on the first uplink carrier and the second uplink power on the second uplink carrier. The second initial power of the signal.
  • the processing module 12 is further configured to determine, according to the second indication information, an initial power for transmitting the second signal on the second uplink carrier.
  • processing module 12 is further configured to:
  • processing module 12 is further configured to:
  • the first transmit count value is determined, wherein the first transmit count value is 1 or the value of the first number of times is incremented by one.
  • An initial power for transmitting the second signal on the second uplink carrier is determined according to the first transmission count value.
  • the receiving module 13 is further included.
  • the receiving module 13 is used to:
  • the network device Receiving first indication information sent by the network device, where the first indication information indicates a first maximum transmission number of the first signal sent by the sending module 11 on the first uplink carrier and a second maximum transmission time of the second signal on the second uplink carrier The number of transmissions.
  • the terminal device provided by the embodiment of the present application is used to perform the method for sending a signal provided by the method embodiment shown in FIG. 3 , and the technical principle and technical effects thereof are similar, and details are not described herein again.
  • FIG. 6 is a schematic structural diagram of a network device according to Embodiment 1 of the present application.
  • the network device provided by the embodiment of the present application is used to perform the method for receiving a signal provided by the embodiment shown in FIG.
  • the network device provided by the embodiment of the present application may include:
  • the sending module 21 is configured to send the first indication information and/or the second indication information to the terminal device, where the first indication information indicates the first maximum number of transmissions of the first signal sent by the terminal device on the first uplink carrier, and the second Transmitting a second maximum number of transmissions of the second signal on the uplink carrier, where the second indication information indicates that the terminal device sends the first initial power of the first signal on the first uplink carrier and the second signal on the second uplink carrier Two initial power.
  • the frequency of the first uplink carrier is different from the frequency of the second uplink carrier, and the first signal and the second signal both comprise a random preamble sequence.
  • the receiving module 22 is configured to receive a first signal sent by the terminal device on the first uplink carrier, or a second signal sent by the terminal device on the second uplink carrier.
  • the network device provided by the embodiment of the present application is used to perform the method for receiving the signal provided by the method embodiment shown in FIG. 4, and the technical principle and the technical effect are similar, and details are not described herein again.
  • FIG. 7 is a schematic structural diagram of a terminal device according to Embodiment 2 of the present application.
  • the terminal device includes a processor 31, a memory 32, and a transceiver 33, where the memory 32 is used to store an instruction, and the transceiver 33 is used for communication with other devices, and the processor 31 is configured to execute the instructions stored in the memory 32, so that the terminal device performs the sending method of the signal provided by the embodiment shown in FIG. The effect is similar and will not be described here.
  • FIG. 8 is a schematic structural diagram of a network device according to Embodiment 2 of the present application.
  • the network device includes a processor 41, a memory 42 and a transceiver 43.
  • the memory 42 is configured to store an instruction, the transceiver. 43 for communicating with other devices, the processor 41 is configured to execute instructions stored in the memory 42 to enable the network device to perform the method for receiving signals provided by the embodiment shown in FIG. 4, and the specific implementation and technology The effect is similar and will not be described here.
  • the processor used by the network device or the terminal device in the present application may be a central processing unit (CPU), a general purpose processor, a digital signal processor (DSP), an application specific integrated circuit (ASIC), and a field programmable gate array (FPGA). Or other programmable logic devices, transistor logic devices, hardware components, or any combination thereof. It is possible to implement or carry out the various illustrative logical blocks, modules and circuits described in connection with the present disclosure.
  • the processor may also be a combination of computing functions, for example, including one or more microprocessor combinations, a combination of a DSP and a microprocessor, and the like.
  • the aforementioned program can be stored in a computer readable storage medium.
  • the program when executed, performs the steps including the foregoing method embodiments; and the foregoing storage medium includes various media that can store program codes, such as a ROM, a RAM, a magnetic disk, or an optical disk.

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

Abstract

Les modes de réalisation de la présente invention concernent un procédé d'émission de signal ainsi qu'un procédé et un appareil de réception. Le procédé d'émission de signal comporte les étapes suivantes: un dispositif terminal envoie un premier signal à un dispositif de réseau sur une première porteuse de liaison montante; lorsqu'un dispositif terminal détermine qu'un premier paramètre satisfait une condition prédéfinie, le dispositif terminal envoie un second signal au dispositif de réseau sur une seconde porteuse de liaison montante, et cesse d'envoyer le premier signal au dispositif de réseau sur la première porteuse de liaison montante, le premier paramètre comportant une première puissance utilisée par le dispositif terminal pour émettre le premier signal sur la première porteuse de liaison montante et/ou un premier nombre de fois où le dispositif terminal a déjà émis le premier signal sur la première porteuse de liaison montante, la fréquence de la première porteuse de liaison montante et la fréquence de la seconde porteuse de liaison montante étant différentes, et le premier signal et le second signal comportant tous deux une séquence de préambule aléatoire. Au cours d'un processus d'accès aléatoire, le dispositif terminal peut automatiquement essayer de changer de porteuse de liaison montante pour émettre la séquence d'accès aléatoire, accroissant le taux de réussite de l'accès aléatoire.
PCT/CN2018/099934 2017-08-11 2018-08-10 Procédé d'émission de signal et procédé et appareil de réception WO2019029696A1 (fr)

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CN110267346B (zh) * 2019-04-29 2021-10-26 华为技术有限公司 一种通信方法、装置及存储介质
CN116801403A (zh) * 2019-07-04 2023-09-22 维沃移动通信有限公司 一种上行发送处理方法、信息配置方法和相关设备

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