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WO2025190093A1 - Procédé de communication et dispositif associé - Google Patents

Procédé de communication et dispositif associé

Info

Publication number
WO2025190093A1
WO2025190093A1 PCT/CN2025/079839 CN2025079839W WO2025190093A1 WO 2025190093 A1 WO2025190093 A1 WO 2025190093A1 CN 2025079839 W CN2025079839 W CN 2025079839W WO 2025190093 A1 WO2025190093 A1 WO 2025190093A1
Authority
WO
WIPO (PCT)
Prior art keywords
time period
terminal device
random access
activation time
network device
Prior art date
Legal status (The legal status 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 status listed.)
Pending
Application number
PCT/CN2025/079839
Other languages
English (en)
Chinese (zh)
Inventor
樊亮亮
徐海博
姚楚婷
薛丽霞
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Huawei Technologies Co Ltd
Original Assignee
Huawei Technologies Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Huawei Technologies Co Ltd filed Critical Huawei Technologies Co Ltd
Publication of WO2025190093A1 publication Critical patent/WO2025190093A1/fr
Pending legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • 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
    • H04W84/00—Network topologies
    • H04W84/02—Hierarchically pre-organised networks, e.g. paging networks, cellular networks, WLAN [Wireless Local Area Network] or WLL [Wireless Local Loop]
    • H04W84/04—Large scale networks; Deep hierarchical networks
    • H04W84/06—Airborne or Satellite Networks
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
    • Y02D30/00—Reducing energy consumption in communication networks
    • Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks

Definitions

  • the present application relates to the field of communications, and in particular to a communication method and related equipment.
  • the terminal device determines whether to receive the corresponding downlink data based on the operation status of the random access response window.
  • NTN non-terrestrial networks
  • satellites as network devices, need to provide services to all terminal devices within their coverage area as much as possible. Therefore, they need to provide services through "beam hopping.”
  • This method can also be understood as providing services to terminal devices using a time-division method. For example, a satellite serves terminal device 1 at time 1 and terminal device 2 at time 2. Terminal device 2 will not receive the data sent by the satellite at this time. In other words, even if terminal device 2 is listening for data at this time, the satellite will not send data to terminal device 2 at this time.
  • the satellite cannot always serve a certain terminal device. Even if the random access response window is running, the terminal device cannot receive downlink data. Ineffective monitoring will also waste the energy consumption of the terminal device.
  • Embodiments of the present application provide a communication method and related devices that operate a random access response window during a first active time period when a network device sends downlink data.
  • the random access response window is not operated during a first inactive time period when the network device does not send downlink data. This method not only reduces ineffective monitoring by a terminal device during the first inactive time period but also saves energy consumption in the terminal device.
  • the present application provides a communication method, which is executed by a terminal device, or the method is executed by some components in the terminal device (such as a processor, a chip or a chip system, etc.), or the method can also be implemented by a logic module or software that can realize all or part of the terminal device functions.
  • the method is applied to a random access process.
  • the method is described as being executed by a terminal device.
  • the terminal device first sends a preamble; the terminal device runs a random access response window within a first activation time period, the first activation time period is a time period in which the network device sends downlink data to the terminal device, and the random access response window is used to receive a random access response; the random access response window does not run within a first inactive time period, and the first inactive time period is a time period in which the network device does not send downlink data to the terminal device.
  • the random access response window is executed during the first active time period when the network device sends downlink data.
  • the random access response window is not executed during the first inactive time period when the network device does not send downlink data.
  • this can reduce ineffective monitoring by the terminal device during the first inactive time period, thereby saving energy consumption of the terminal device.
  • the above further includes: determining a first moment, the first moment being the sum of the end moment of the preamble code and the round-trip time RTT, or the first moment being the sum of the end moment of the preamble code, N time domain units, and RTT, RTT being the round-trip time between the terminal device and the network device, and N being an integer; the first moment being within a first inactive time period, and opening a random access response window at the start moment of the next active time period or at a moment after the start moment.
  • the terminal device synchronizes or resynchronizes (e.g., downlink synchronization) with the network device at the start moment of the next active time period or at a moment after the start moment, and opens the random access response window.
  • the RTT does not need to be completed in the next activation time period.
  • This is equivalent to the first inactive time period being able to offset the RTT, or it can be understood that the RTT continues to run in the first inactive time period, and the terminal device does not open the random access response window when the RTT ends.
  • the terminal device synchronizes or resynchronizes with the network device (for example, downlink synchronization) and opens the random access response window. This can improve the speed at which the terminal device receives the random access response, thereby reducing the time of the random access process of the terminal device.
  • the first time period is greater than half of the round-trip time RTT between the terminal device and the network device, the first time period is the time period between the end moment of the preamble code and the end moment of the second activation time period, and the second activation time period is the time period for the network device to receive uplink data sent by the terminal device.
  • the process of considering the first time period and RTT can also be understood as a process of setting conditions for sending the preamble, which can prevent the network device from not receiving the preamble due to power limitation or beam hopping.
  • the steps further include: during the operation of the random access response window, if a first preset condition is met, adding a first duration to the random access response window, the first duration being at least one first inactive time period, the random access response window continuing to operate during the first inactive time period, and no random access response being received during the first inactive time period; the first preset condition including any one of the following: expiration of the first active time period, end of the first active time period, or the random access response window being within the first inactive time period.
  • the terminal device will receive a random access response only when the random access response window is operating and within the first active time period.
  • the above steps further include: during the operation of the random access response window, if a first preset condition is met, suspending the random access response window, and continuing to operate the suspended random access response window at the start time of the next activation time period or at a time after the start time; for example, the terminal device synchronizes or resynchronizes (e.g., downlink synchronization) with the network device at the start time of the next activation time period or at a time after the start time, and operates the suspended random access response window.
  • the first preset condition includes any one of the following: expiration of the first activation time period, end of the first activation time period, or the random access response window is within the first inactive time period.
  • pausing the random access window can avoid invalid monitoring by the terminal device during the inactive time period when the network device does not send data.
  • the above steps after sending the preamble code, the method also includes: receiving a random access response within the random access response window; when the second time period is greater than half of the RTT, sending first information, the first information carries an identifier of the terminal device, the second time period is the time period between the end time of the first information and the end time of the third activation time period, and the third activation time period is the time period for the network device to receive uplink data sent by the terminal device.
  • the process of considering the second time period and RTT can also be understood as a process of setting conditions for sending the first information, which can prevent the network device from not receiving the first information due to power limitation or beam hopping.
  • the above steps also include: running a contention resolution timer in a fourth activation time period, the fourth activation time period being a time period in which the network device sends downlink data to the terminal device, the fourth activation time period being after the first activation time period, and the contention resolution timer being used to receive contention resolution messages; the contention resolution timer does not run in a fourth inactive time period, the fourth inactive time period being a time period in which the network device does not send downlink data to the terminal device.
  • the contention resolution timer runs during the fourth active time period when the network device is sending downlink data, and does not run during the fourth inactive time period when the network device is not sending downlink data.
  • this method can reduce ineffective monitoring by the terminal device during the fourth inactive time period, thereby saving energy consumption of the terminal device.
  • the above steps further include: determining a second moment, the second moment being the sum of the end moment of the first information and the RTT, or the second moment being the sum of the end moment of the first information, N time domain units, and the RTT, where N is a positive integer; the second moment is within a fourth inactive time period, and starting a contention resolution timer at the start moment of the next active time period or at a moment after the start moment.
  • the terminal device synchronizes or resynchronizes (e.g., downlink synchronization) with the network device at the start moment of the next active time period or at a moment after the start moment, and starts the contention resolution timer.
  • the RTT does not need to be completed in the next active time period, which is equivalent to the fourth inactive time period offsetting the RTT.
  • the RTT continues to run in the fourth inactive time period, and the UE does not start the contention resolution timer when the RTT ends.
  • the contention resolution timer is started at the start time of the next active time period or at a time after the start time. This can increase the speed at which the terminal device receives the contention resolution message, thereby reducing the time of the terminal device's random access process.
  • the above steps further include: during the operation of the contention resolution timer, if a second preset condition is met, a second duration is added to the contention resolution timer, the second duration is at least a fourth inactive time period, the contention resolution timer continues to run during the fourth inactive time period, but no contention resolution message is received during the fourth inactive time period; the second preset condition includes any one of the following: expiration of the fourth active time period, end of the fourth active time period, or the contention resolution timer is within the fourth inactive time period.
  • the above process can also be understood as that the terminal device will receive the contention resolution message only when the contention resolution timer is running and within the fourth active time period.
  • the above steps further include: during the operation of the contention resolution timer, if a second preset condition is met, the contention resolution timer is suspended, and the suspended contention resolution timer is continued to run at the start time of the next activation time period or at a time after the start time.
  • the terminal device synchronizes or resynchronizes (for example, downlink synchronization) with the network device at the start time of the next activation time period or at a time after the start time, and runs the previously suspended contention resolution timer.
  • the second preset condition includes any one of the following: the fourth activation time period expires, the fourth activation time period ends, or the contention resolution timer is within the fourth inactive time period.
  • pausing the contention resolution timer can avoid invalid monitoring by the terminal device during the inactive time period when the network device does not send data.
  • the above-mentioned step: sending a preamble code includes: sending the second information when the third time period is greater than half of the round-trip time RTT between the terminal device and the network device, the third time period is the time period between the end time of the second information and the end time of the fifth activation time period, the second information includes the preamble code and the effective load carried by the uplink shared channel, the end time of the second information includes the end time of the preamble code and/or the end time of the uplink data, and the fifth activation time period is the time period for the network device to receive the uplink data sent by the terminal device.
  • the process of considering the third time period and RTT can also be understood as a process of setting conditions for sending the second information, which can prevent the network device from not receiving the second information due to power limitation or beam hopping.
  • the above steps also include: receiving configuration information sent by the network device, the configuration information is used to indicate at least one of the following: a first activation time period, a first non-activation time period, a second activation time period, a third activation time period, a fourth activation time period, and a fourth non-activation time period, the second activation time period being the time period for the network device to receive uplink data sent by the terminal device, the third activation time period being the time period for the network device to receive uplink data from the terminal device, the fourth activation time period being the time period for the network device to send downlink data to the terminal device, the fourth activation time period is after the first activation time period, and the fourth non-activation time period is the time period for the network device not to send downlink data to the terminal device.
  • the terminal device can clearly define each active time period and each inactive time period through the configuration information sent by the network device, thereby reducing invalid monitoring of the terminal device in the inactive time period and saving energy consumption of the terminal device.
  • the second aspect of the present application provides a communication method, which is executed by a network device, or the method is executed by some components in the network device (such as a processor, a chip or a chip system, etc.), or the method can also be implemented by a logic module or software that can realize all or part of the network device functions.
  • the method is applied to a random access process.
  • the method is described as being executed by a network device.
  • the network device receives a preamble; the network device sends a random access response within a first activation time period, the first activation time period is a time period in which the network device sends downlink data to the terminal device, and no random access response is sent within a first inactive time period, and the first inactive time period is a time period in which the network device does not send downlink data to the terminal device.
  • a random access response is sent during the first active time period when the network device is sending downlink data, and no random access response is sent during the first inactive time period.
  • this solution can reduce ineffective monitoring by the terminal device during the first inactive time period, thereby saving energy consumption of the terminal device.
  • the contention resolution message is sent during the fourth active time period when the network device is sending downlink data, and no contention resolution message is sent during the fourth inactive time period.
  • this can reduce ineffective monitoring by the terminal device during the fourth inactive time period, thereby saving energy consumption of the terminal device.
  • the above step of: receiving the preamble code includes: receiving second information, where the second information includes the preamble code and a valid payload carried by the uplink shared channel.
  • the method may be applied in a two-step random access process.
  • the above steps also include: sending configuration information, the configuration information is used to indicate at least one of the following: a first activation time period, a first non-activation time period, a second activation time period, a third activation time period, a fourth activation time period, and a fourth non-activation time period, the second activation time period being the time period for the network device to receive uplink data sent by the terminal device, the third activation time period being the time period for the network device to receive uplink data from the terminal device, the fourth activation time period being the time period for the network device to send downlink data to the terminal device, the fourth activation time period is after the first activation time period, and the fourth non-activation time period is the time period for the network device not to send downlink data to the terminal device.
  • the network device can clearly indicate the active time periods and the inactive time periods to the terminal device through configuration information, thereby reducing invalid monitoring of the terminal device during the inactive time period and saving energy consumption of the terminal device.
  • the present application provides a communication device, which is a terminal device, or a component of a terminal device (such as a processor, chip, or chip system), or a logic module or software that can implement all or part of the terminal device functions.
  • the communication device includes a transceiver unit and a processing unit.
  • a transceiver unit configured to send a preamble
  • a processing unit is configured to operate a random access response window within a first activation time period, where the first activation time period is a time period during which the network device sends downlink data to the terminal device, and the random access response window is used to receive a random access response; the random access response window does not operate within a first inactive time period, where the first inactive time period is a time period during which the network device does not send downlink data to the terminal device.
  • the above-mentioned processing unit is also used to determine the first moment, the first moment being the sum of the end moment of the preamble code and the round-trip time RTT, or the first moment being the sum of the end moment of the preamble code, N time domain units and RTT, RTT is the round-trip time between the terminal device and the network device, and N is an integer; the processing unit is also used to be in the first inactive time period at the first moment, and to re-synchronize with the network device (for example, downlink synchronization) at the start moment of the next active time period or after the start moment, and open a random access response window.
  • the network device for example, downlink synchronization
  • the above-mentioned first time period is greater than half of the round-trip time RTT between the terminal device and the network device, the first time period is the time period between the end time of the preamble code and the end time of the second activation time period, and the second activation time period is the time period for the network device to receive uplink data sent by the terminal device.
  • the above-mentioned processing unit is also used to meet the first preset condition during the operation of the random access response window, increase the first duration of the random access response window, the first duration is at least one first non-activation time period, continue to run the random access response window during the first non-activation time period, and do not receive a random access response during the first non-activation time period;
  • the first preset condition includes any one of the following: the first activation time period expires, the first activation time period ends, or the random access response window is within the first non-activation time period.
  • the processing unit is further configured to, during the operation of the random access response window, if a first preset condition is met, suspend the random access response window, and continue to operate the suspended random access response window at the start time of the next activation time period or at a time after the start time; for example, the terminal device synchronizes or resynchronizes (e.g., downlink synchronization) with the network device at the start time of the next activation time period or at a time after the start time, and operates the suspended random access response window.
  • the first preset condition includes any one of the following: expiration of the first activation time period, end of the first activation time period, or the random access response window is within the first inactive time period.
  • the above-mentioned transceiver unit is also used to receive a random access response within the random access response window; the transceiver unit is also used to send first information when the second time period is greater than half of the RTT, the first information carries an identifier of the terminal device, the second time period is the time period between the end time of the first information and the end time of the third activation time period, and the third activation time period is the time period for the network device to receive uplink data sent by the terminal device.
  • the above-mentioned processing unit is also used to run a contention resolution timer within a fourth activation time period, the fourth activation time period being a time period in which the network device sends downlink data to the terminal device, the fourth activation time period being after the first activation time period, and the contention resolution timer being used to receive contention resolution messages; the contention resolution timer does not run within a fourth inactive time period, the fourth inactive time period being a time period in which the network device does not send downlink data to the terminal device.
  • the above-mentioned processing unit is also used to determine a second moment, where the second moment is the sum of the end moment of the first information and the RTT, or the second moment is the sum of the end moment of the first information, N time domain units and the RTT, where N is a positive integer; the processing unit is also used to start the contention resolution timer at the start moment of the next activation time period or at a certain moment after the start moment when the second moment is in a fourth non-activation time period.
  • the above-mentioned processing unit is also used to meet the second preset condition during the operation of the contention resolution timer, increase the second duration for the contention resolution timer, and the second duration is at least one fourth non-activation time period.
  • the contention resolution timer continues to run during the fourth non-activation time period, but no contention resolution message is received during the fourth non-activation time period;
  • the second preset condition includes any one of the following: the fourth activation time period expires, the fourth activation time period ends, or the contention resolution timer is within the fourth non-activation time period.
  • the processing unit is further configured to, when a second preset condition is met during the operation of the contention resolution timer, suspend the contention resolution timer, and continue to run the suspended contention resolution timer at the start time of the next activation time period or at a time after the start time; for example, the terminal device synchronizes or resynchronizes (e.g., downlink synchronization) with the network device at the start time of the next activation time period or at a time after the start time, and runs the suspended contention resolution timer.
  • the second preset condition includes any one of the following: expiration of the fourth activation time period, end of the fourth activation time period, or the contention resolution timer is within the fourth inactive time period.
  • the above-mentioned transceiver unit is specifically used to send the second information when the third time period is greater than half of the round-trip time RTT between the terminal device and the network device.
  • the third time period is the time period between the end time of the second information and the end time of the fifth activation time period.
  • the second information includes the preamble code and the effective load carried by the uplink shared channel.
  • the end time of the second information includes the end time of the preamble code and/or the end time of the uplink data.
  • the fifth activation time period is the time period for the network device to receive the uplink data sent by the terminal device.
  • the above-mentioned transceiver unit is also used to receive configuration information sent by the network device, and the configuration information is used to indicate at least one of the following: a first activation time period, a first non-activation time period, a second activation time period, a third activation time period, a fourth activation time period, and a fourth non-activation time period.
  • the second activation time period is the time period when the network device receives uplink data sent by the terminal device
  • the third activation time period is the time period when the network device receives uplink data from the terminal device
  • the fourth activation time period is the time period when the network device sends downlink data to the terminal device
  • the fourth activation time period is after the first activation time period
  • the fourth non-activation time period is the time period when the network device does not send downlink data to the terminal device.
  • a fourth aspect of the present application provides a communication device, which is a network device, or a component of a network device (such as a processor, chip, or chip system), or a logic module or software that can implement all or part of the network device functions.
  • the communication device includes a transceiver unit.
  • a transceiver unit configured to receive a preamble
  • the transceiver unit is also used to send a random access response within a first activation time period, where the first activation time period is the time period during which the network device sends downlink data to the terminal device; and no random access response is sent within a first inactive time period, where the network device does not send downlink data to the terminal device.
  • the above-mentioned transceiver unit is also used to receive first information, and the first information carries an identification of the terminal device; the transceiver unit is also used to send a contention resolution message within a fourth activation time period, and the fourth activation time period is a time period in which the network device sends downlink data to the terminal device, and no contention resolution message is sent within the fourth non-activation time period, and the fourth non-activation time period is a time period in which the network device does not send downlink data to the terminal device, and the fourth activation time period is after the first activation time period.
  • the above-mentioned transceiver unit is further used to receive second information, where the second information includes a preamble code and a valid payload carried by an uplink shared channel.
  • the above-mentioned transceiver unit is also used to send configuration information, and the configuration information is used to indicate at least one of the following: a first activation time period, a first non-activation time period, a second activation time period, a third activation time period, a fourth activation time period, and a fourth non-activation time period.
  • the second activation time period is a time period in which the network device receives uplink data sent by the terminal device.
  • the third activation time period is a time period in which the network device receives uplink data from the terminal device.
  • the fourth activation time period is a time period in which the network device sends downlink data to the terminal device.
  • the fourth activation time period is after the first activation time period.
  • the fourth non-activation time period is a time period in which the network device does not send downlink data to the terminal device.
  • the present application provides a communication device comprising at least one processor coupled to at least one memory; the at least one memory is used to store programs or instructions; and the at least one processor is used to execute the program or instructions so that the device implements a method of any possible implementation of the first aspect described above.
  • a communication device comprising at least one processor coupled to at least one memory; the at least one memory is used to store programs or instructions; and the at least one processor is used to execute the program or instructions so that the device implements a method of any possible implementation of the aforementioned second aspect.
  • the present application provides a communication device comprising at least one logic circuit and at least one input/output interface; the logic circuit is used to execute the method described in any possible implementation of the first aspect.
  • the present application provides a communication device comprising at least one logic circuit and at least one input/output interface; the logic circuit is used to execute a method as any possible implementation method in the aforementioned second aspect.
  • the present application provides a communication system, which includes a communication device of any possible implementation method in the fifth aspect and a communication device of any possible implementation method in the sixth aspect, or includes a communication device of any possible implementation method in the seventh aspect and a communication device of any possible implementation method in the eighth aspect.
  • the present application provides a computer-readable storage medium for storing one or more computer-executable instructions.
  • the processor executes the method described in any possible implementation of any of the first or second aspects above.
  • the present application provides a computer program product (or computer program).
  • the processor executes the method described in any possible implementation of any of the first or second aspects above.
  • a twelfth aspect of the present application provides a chip or chip system, which includes at least one processor for supporting a communication device to implement the method described in any possible implementation method of any aspect of the first or second aspect.
  • the chip system may also include at least one memory for storing program instructions and data necessary for the communication device.
  • the chip system may be composed of a chip or may include a chip and other discrete components.
  • the chip system also includes an interface circuit that provides program instructions and/or data to at least one processor.
  • the technical effects brought about by any design method in the fifth to twelfth aspects can refer to the technical effects brought about by the different design methods in the above-mentioned first to fourth aspects, and will not be repeated here.
  • FIG1 is a schematic diagram of a communication system provided by the present application.
  • FIG2a is a schematic diagram of a satellite communication process in a transparent transmission mode provided by the present application.
  • FIG2 b is another schematic diagram of the satellite communication process in the transparent transmission mode provided by the present application.
  • FIG2c is a schematic diagram of a satellite communication process in a regeneration mode provided by the present application.
  • FIG2 d is another schematic diagram of the satellite communication process in the regeneration mode provided by the present application.
  • FIG2e is another schematic diagram of the satellite communication process in the regeneration mode provided by the present application.
  • FIG2f is a schematic diagram of a satellite communication process in a 5G system provided by this application.
  • FIG2g is another schematic diagram of the satellite communication process in the regeneration mode provided by the present application.
  • FIG3a is an example diagram of a communication scenario provided by this application.
  • FIG3b is an example diagram of an active time period and an inactive time period corresponding to the communication scenario shown in FIG3a;
  • FIG4 is a flow chart of a communication method provided by the present application.
  • FIG5 is an example diagram of a first activation time period and a first inactivation time period provided by the present application
  • 6 to 8 are diagrams illustrating several relationships between the random access window and the first active time period/first inactive time period provided in the present application;
  • 9 to 11 are diagrams illustrating several examples of the relationship between the contention resolution timer and the fourth active time period/fourth inactive time period provided by the present application;
  • the terminal device can be a wireless terminal device capable of receiving network device scheduling and indication information.
  • the wireless terminal device can be a device that provides voice and/or data connectivity to the user, or a handheld device with wireless connection function, or other processing device connected to a wireless modem.
  • Terminal devices can be various communication kits (which may include, for example, antennas, power supply modules, cables, and Wi-Fi modules) with wireless communication capabilities. Terminal devices can also be communication modules with satellite communication capabilities, satellite phones or their components, or very small aperture terminals (VSATs). Terminal devices can be mobile terminal devices, such as mobile phones (also known as "cellular" phones), computers, and data cards. For example, they can be portable, pocket-sized, handheld, computer-built-in, or vehicle-mounted mobile devices that exchange voice and/or data with wireless access networks. Examples include personal communication service (PCS) phones, cordless phones, session initiation protocol (SIP) phones, wireless local loop (WLL) stations, personal digital assistants (PDAs), tablet computers, and computers with wireless transceiver capabilities.
  • PCS personal communication service
  • SIP session initiation protocol
  • WLL wireless local loop
  • PDAs personal digital assistants
  • tablet computers and computers with wireless transceiver capabilities.
  • a wireless terminal device may also be referred to as a system, subscriber unit, subscriber station, mobile station, mobile station (MS), remote station, access point (AP), remote terminal, access terminal, user terminal, user agent, subscriber station (SS), customer premises equipment (CPE), terminal, user equipment (UE), mobile terminal (MT), drone, etc.
  • a terminal device may also be a wearable device or a next-generation communication system, for example, a terminal device in a 6G communication system or a terminal device in a future public land mobile network (PLMN).
  • PLMN public land mobile network
  • the terminal device in this application may also refer to the chip, modem, system on a chip (SoC) in the device that is mainly responsible for related communication functions, or a communication platform that may include a radio frequency (RF) part.
  • RF radio frequency
  • a network device can be a device in a wireless network, for example, a radio access network (RAN) node (or device) that connects a terminal device to a wireless network, also known as a base station.
  • RAN devices include: new-generation base stations in future communication systems, transmission reception points (TRPs), evolved Node Bs (eNBs), radio network controllers (RNCs), Node Bs (NBs), base station controllers (BSCs), base transceiver stations (BTSs), home base stations (e.g., home evolved Node Bs or home Node Bs, HNBs), baseband units (BBUs), or wireless fidelity (Wi-Fi) access points (APs).
  • TRPs transmission reception points
  • eNBs evolved Node Bs
  • RNCs radio network controllers
  • NBs Node Bs
  • BSCs base station controllers
  • BTSs base transceiver stations
  • home base stations e.g., home evolved Node Bs or home Node Bs
  • the network equipment may also include satellites, aircraft, drones, and ground station equipment connected to the satellites, aircraft, and drones.
  • the network device can send configuration information to the terminal device (for example, carried in a scheduling message and/or an indication message), and the terminal device further performs network configuration according to the configuration information, so that the network configurations between the network device and the terminal device are aligned; or, through the network configuration preset in the network device and the network configuration preset in the terminal device, the network configurations between the network device and the terminal device are aligned.
  • alignment means that when there are interactive messages between the network device and the terminal device, the two have a consistent understanding of the carrier frequency for sending and receiving interactive messages, the determination of the interactive message type, the meaning of the field information carried in the interactive message, or other configurations of the interactive message.
  • the network device may be another device that provides wireless communication functions for the terminal device.
  • the embodiments of this application do not limit the specific technology and specific device form used by the network device. For the convenience of description, the embodiments of this application are not limited.
  • the apparatus for implementing the function of the network device may be the network device, or may be a device capable of supporting the network device in implementing the function, such as a chip system, which may be installed in the network device.
  • the technical solutions provided in the embodiments of the present application are described by taking the network device as an example.
  • Configuration refers to the network device/server sending some parameter configuration information or parameter values to the terminal through messages or signaling, so that the terminal can determine the communication parameters or resources during transmission based on these values or information.
  • Pre-configuration is similar to configuration and can be parameter information or parameter values pre-negotiated between the network device/server and the terminal device, parameter information or parameter values used by the base station/network device or terminal device as specified in the standard protocol, or parameter information or parameter values pre-stored in the base station/server or terminal device. This application does not limit this.
  • used for indication can include direct indication and indirect indication.
  • indication information carries A, directly indicates A, or indirectly indicates A.
  • the information indicated by the indication information is referred to as the information to be indicated.
  • the information to be indicated there are many ways to indicate the information to be indicated. For example, it can be implemented by direct indication, such as by indicating the information to be indicated itself or the index of the information to be indicated. It can also be implemented by indirectly indicating other information, wherein there is an association between the other information and the information to be indicated. It is also possible to indicate only a part of the information to be indicated, while the other parts of the information to be indicated are known or agreed in advance. For example, the indication of specific information can also be achieved with the help of the arrangement order of each information agreed in advance (for example, stipulated in the protocol), thereby reducing the indication overhead to a certain extent.
  • the information to be indicated can be sent as a whole, or divided into multiple sub-information and sent separately, and the sending period and/or sending time of these sub-information can be the same or different.
  • the specific sending method is not limited in this application.
  • the sending period and/or sending time of these sub-information can be predefined, for example, predefined according to the protocol, or configured by the transmitting device by sending configuration information to the receiving device.
  • the configuration information can, for example, but not limited to, include one or a combination of at least two of RRC signaling, medium access control (MAC) layer signaling and physical layer signaling.
  • MAC layer signaling for example, includes MAC CE
  • physical layer signaling for example, includes downlink control information (DCI).
  • sending and “receiving” refer to the direction of signal transmission.
  • entity A when entity A sends information to entity B, A may send it directly to B or indirectly to B through another entity.
  • entity B may directly receive the information sent by entity A or indirectly receive the information sent by entity A through another entity.
  • Entities A and B herein may be RAN nodes or terminals, or modules within a RAN node or terminal.
  • the sending and receiving of information may be information exchange between a RAN node and a terminal, for example, between a base station and a terminal; between two RAN nodes, for example, between a CU and a DU; or between different modules within a device, for example, between a terminal chip and other modules in the terminal, or between a base station chip and other modules within the base station.
  • Send may also be understood as the "output" of a chip interface, for example, a baseband chip outputting information to a radio frequency chip
  • “receiving” may also be understood as the "input" of a chip interface.
  • system and “network” in the embodiments of the present application can be used interchangeably.
  • “At least one” means one or more, and “plurality” means two or more.
  • “And/or” describes the association relationship of associated objects, indicating that three relationships may exist.
  • a and/or B can mean: A exists alone, A and B exist at the same time, and B exists alone, where A and B can be singular or plural.
  • the character “/” generally indicates that the previous and next associated objects are in an “or” relationship.
  • At least one of the following” or similar expressions refers to any combination of these items, including any combination of single or plural items.
  • “at least one of A, B and C” includes A, B, C, AB, AC, BC or ABC.
  • the ordinal numbers such as “first” and “second” mentioned in the embodiments of the present application are used to distinguish multiple objects, and are not used to limit the order, timing, priority or importance of multiple objects.
  • the present application can be applied to a long term evolution (LTE) system, a new radio (NR) system, or a new wireless vehicle to everything (NR V2X) system; it can also be applied to a system with a hybrid LTE and 5G network; or a device-to-device (D2D) communication system, a machine-to-machine (M2M) communication system, an Internet of Things (IoT), or a drone communication system; or a communication system that supports multiple wireless technologies, such as LTE and NR technologies; or a non-ground communication system, such as a satellite communication system, a high-altitude communication platform, etc.
  • LTE long term evolution
  • NR new radio
  • NR V2X new wireless vehicle to everything
  • the communication system may also be applicable to narrowband internet of things (NB-IoT), enhanced data rate for GSM evolution (EDGE), wideband code division multiple access (WCDMA), code division multiple access 2000 (CDMA2000), time division-synchronization code division multiple access (TD-SCDMA), and future communication technologies.
  • NB-IoT narrowband internet of things
  • EDGE enhanced data rate for GSM evolution
  • WCDMA wideband code division multiple access
  • CDMA2000 code division multiple access 2000
  • TD-SCDMA time division-synchronization code division multiple access
  • future communication technologies Alternatively, the communication system may be applicable to other communication systems, wherein the communication system includes a network device and a terminal device, the network device serving as a configuration information sending entity, and the terminal device serving as a configuration information receiving entity.
  • an entity sends configuration information to another entity and sends data to the other entity, or receives data sent by the other entity; another entity receives the configuration information and, based on the configuration information, sends data to the configuration information sending entity, or receives data sent by the configuration information sending entity.
  • the present application can be applied to terminal devices in a connected state or an active state (active), and can also be applied to terminal devices in a non-connected state (inactive) or an idle state (idle).
  • FIG 1 is a schematic diagram of the architecture of a communication system 1000 used in an embodiment of the present application.
  • the communication system includes a radio access network (RAN) 100 and a core network 200.
  • the communication system 1000 may also include the Internet 300.
  • the RAN 100 includes at least one RAN node (such as 110a and 110b in Figure 1, collectively referred to as 110) and may also include at least one terminal (such as 120a-120j in Figure 1, collectively referred to as 120).
  • the RAN 100 may also include other RAN nodes, such as wireless relay devices and/or wireless backhaul devices (not shown in Figure 1).
  • the terminal 120 is wirelessly connected to the RAN node 110, and the RAN node 110 is wirelessly or wiredly connected to the core network 200.
  • the core network devices in the core network 200 and the RAN node 110 in the RAN 100 may be independent and different physical devices, or they may be the same physical device that integrates the logical functions of the core network devices and the logical functions of the RAN nodes. Terminals and RAN nodes may be connected to each other via wired or wireless means.
  • the technical solutions of the embodiments of the present application are applicable to a communication system that integrates terrestrial and satellite communications, which may also be referred to as a non-terrestrial network (NTN) communication system.
  • the RAN 100 in FIG1 may include a terrestrial base station, wherein the terrestrial base station may include a TN cell (i.e., the signal of the TN cell can be transmitted and received by the terrestrial base station); and the RAN 100 in FIG1 may also include a non-terrestrial base station.
  • the non-terrestrial base station is a satellite
  • the satellite may include an NTN cell (i.e., the signal of the NTN cell can be transmitted and received by the satellite).
  • the terrestrial communication system may be, for example, a long-term evolution (LTE) system, a universal mobile telecommunication system (UMTS), a 5G communication system, a new radio (NR) system, or a communication system that is the next step in the development of the 5G communication system, etc., and is not limited here.
  • LTE long-term evolution
  • UMTS universal mobile telecommunication system
  • 5G communication system 5G communication system
  • NR new radio
  • satellite communications offer advantages such as wider coverage, communication costs unrelated to transmission distance, and the ability to overcome natural geographical obstacles such as oceans, deserts, and mountains.
  • satellite communications can serve as an effective supplement to traditional networks. It is generally believed that non-terrestrial network communications have different channel characteristics than terrestrial network communications, such as longer transmission delays and greater Doppler frequency deviations. For example, the round-trip delay for GEO satellite communications is 238 to 270 milliseconds (ms). The round-trip delay for LEO satellite communications is 8 to 20 ms.
  • Satellite communication systems can be categorized into three types based on their orbital altitude: high-orbit (GEO) satellite communication systems, also known as synchronous orbit satellite systems; medium-orbit (MEO) satellite communication systems; and low-orbit (LEO) satellite communication systems.
  • GEO high-orbit
  • MEO medium-orbit
  • LEO low-orbit
  • GEO satellites also known as geostationary orbit satellites, orbit at an altitude of 35,786 kilometers (km). Their primary advantages are stationary relative to the Earth and wide coverage. However, GEO satellites also have significant disadvantages: their distance from Earth requires larger antennas; their transmission latency is relatively high, around 0.5 seconds, making them inadequate for real-time services; and their orbital resources are relatively limited, resulting in high launch costs and a lack of coverage in polar regions. MEO satellites, orbiting at altitudes between 2,000 and 35,786 km, can achieve global coverage with a relatively small number of satellites. However, their transmission latency is higher than that of LEO satellites, and they are primarily used for positioning and navigation.
  • LEO satellites orbiting at altitudes between 300 and 2,000 km are called low-Earth Orbit (LEO).
  • LEO satellites are lower than MEO and GEO satellites, resulting in lower data transmission latency, less power consumption, and relatively lower launch costs. Consequently, LEO satellite communication networks have made significant progress in recent years and garnered significant attention.
  • satellite equipment can be divided into a transparent mode and a regenerative mode according to its working mode.
  • satellites and gateways act as relays, namely, the Remote Radio Unit (RRU) shown in Figure 2a.
  • RRU Remote Radio Unit
  • Communication between terminal devices and the gNB requires relaying.
  • satellites perform relay functions. Their functions include radio frequency filtering, frequency conversion, and amplification.
  • satellites primarily serve as Layer 1 relays, regenerating physical layer signals.
  • Gateway stations have base station functions or partial base station functions; in this case, the gateway stations can be considered base stations.
  • base stations can be deployed separately from gateway stations, in which case the feeder link latency includes both the satellite-to-gateway latency and the gateway-to-gNB latency.
  • the transparent transmission mode can be based on the case where the gateway station and the gNB are together or located close to each other.
  • the feeder link delay can be calculated by adding the delay from the satellite to the gateway station and the delay from the gateway station to the gNB.
  • the satellite in this mode can also be understood as a regenerative satellite without an intersatellite link (ISL).
  • the satellite and gateway i.e., the NTN Gateway in Figure 2c
  • gNBs enabling communication with end devices.
  • the satellite performs base station functions or partial base station functions, and can be considered a base station.
  • Examples of satellites with base station processing capabilities include regenerative satellites without ISLs and gNB-processed payloads.
  • the satellite when the satellite (including GEO satellite, MEO satellite, LEO satellite, etc.) operates in the regeneration mode, compared with the implementation shown in Figure 2b, the satellite has the function of a base station or partial base station function. At this time, the satellite can be regarded as a base station.
  • NTN and terrestrial base stations can interconnect through a common core network. Interfaces defined between base stations can also enable more timely collaboration and interconnection.
  • the interface between base stations is called the Xn interface
  • the interface between base stations and the core network is called the NG interface.
  • NTN nodes and terrestrial nodes can achieve interoperability and collaboration using these interfaces.
  • the satellite in another implementation of regenerative mode, as shown in Figure 2e, can also be understood as a regenerative satellite with an intersatellite link (ISL).
  • the satellite has base station functionality or partial base station functionality, and in this case, the satellite can be considered a base station. It also has base station processing capabilities, such as a regenerative satellite with ISL and gNB processed payload.
  • the difference between Figure 2e and Figure 2c is that the scenario in Figure 2e includes an ISL.
  • the present application can be applied to long-term evolution (LTE) systems, new radio (NR) systems, or communication systems evolved after 5G (such as 6G, 7G, etc.).
  • LTE long-term evolution
  • NR new radio
  • 5G 5G satellite communication system architecture
  • Ground terminal equipment accesses the network through the 5G new air interface.
  • the 5G base station is deployed on the satellite and connected to the ground core network through a wireless link.
  • the devices and interfaces in Figure 2f are described as follows:
  • 5G core network user access control, mobility management, session management, user security authentication, billing, and other services. It consists of multiple functional units, which can be divided into functional entities of the control plane and data plane.
  • the access and mobility management function (AMF) is responsible for user access management, security authentication, and mobility management.
  • the user plane function (UPF) is responsible for managing user plane data transmission, traffic statistics, and other functions.
  • the session management function (SMF) is mainly used for session management in mobile networks, such as session establishment, modification, and release.
  • Ground station responsible for forwarding signaling and service data between satellite base stations and 5G core network.
  • 5G New Air Interface The wireless link between the terminal and the base station.
  • Xn interface The interface between 5G base stations, mainly used for signaling interactions such as switching.
  • NG interface The interface between the 5G base station and the 5G core network, which mainly interacts with the core network's non-access stratum (NAS) signaling and user service data.
  • NAS non-access stratum
  • the satellite in another implementation of regenerative mode, as shown in Figure 2g, can be understood as a regenerative satellite with base station DU processing capabilities (NG-RAN with a regenerative satellite based on gNB-DU).
  • the satellite has base station processing capabilities, such as ISL and gNB-processed payload.
  • Figure 2g differs from Figures 2c and 2e in that the satellite in this scenario functions as a DU.
  • the network devices in the terrestrial network communication system and the satellites in the NTN communication system can be uniformly regarded as network devices.
  • the device used to implement the function of the network device can be a network device; it can also be a device that can support the network device to implement the function, such as a chip system, which can be installed in the network device.
  • the technical solutions provided by the embodiments of the present application are described by taking the device used to implement the function of the network device as a satellite as an example. It can be understood that when the method provided by the embodiments of the present application is applied to the terrestrial network communication system, the actions performed by the satellite can be applied to the base station or network device for execution.
  • the device for realizing the function of the terminal device may be a terminal device; or it may be a device capable of supporting the terminal device to realize the function, such as a chip system, which may be installed in the terminal device.
  • the chip system may be composed of a chip, or may include a chip and other discrete devices.
  • the above-mentioned satellites can be geostationary satellites, non-geostationary satellites, artificial satellites, low-orbit satellites, medium-orbit satellites, high-orbit satellites, etc., which are not specifically limited in this application.
  • the signal that a network device can send can configure communication resources.
  • the communication resources may include the communication resources of the network device and the communication resources of any adjacent network devices, so that the receiver of the signal can determine the corresponding communication resources based on the signal. For example, if the receiver of the signal is a terminal device, the terminal device can obtain network services based on the communication resources.
  • the 3rd Generation Partnership Project (3GPP) network proposes two random access (RA) procedures.
  • the first random access procedure consists of the following four steps: Step 1: The terminal sends a preamble (also called Msg1) to the network device; Step 2: The network device returns a random access response (RAR) (also called Msg2) based on the received preamble; Step 3: The terminal sends uplink data (also called Msg3) based on the random access response; Step 4: The network device returns a contention resolution message (also called Msg4) based on the uplink data to the terminal.
  • RACH random access channel
  • the second random access process includes the following two steps: Step A: The terminal sends message A (MsgA) to the network device, where MsgA may include a preamble and uplink data; Step B: After receiving MSGA, the network device sends message B (MsgB) to the terminal, where MsgB may include a random access response and a contention resolution message; the industry calls this random access process a two-step random access process or 2-step RACH or 2-step random access.
  • MsgA message A
  • MsgB message B
  • MsgB may include a random access response and a contention resolution message
  • network devices achieve energy conservation by periodically sending or receiving data.
  • network devices transmit downlink data during their active time and do not need to do so during their inactive time.
  • This is also known as discontinuous transmission (DTX).
  • terminal devices receive downlink data during their active time and do not receive downlink data during their inactive time.
  • discontinuous reception DRX is the opposite of DTX: the network device receives uplink data during its DRX active time and does not need to receive uplink data during its inactive time. Accordingly, the terminal device transmits uplink data during its DRX active time and does not transmit uplink data during its DRX inactive time.
  • the network device continues to transmit Msg2 and Msg4 during its inactive time. This means that the terminal device receives Msg2 and Msg4 during its inactive time, but within the random access response window or while the contention resolution timer is running.
  • the satellite serves user 1 at time T1 and user 2 at time T2. Therefore, user 2 will not receive data sent by the satellite at time T1. In other words, even if user 2 were listening for data at time T1, the satellite would not transmit data to user 2 at that time.
  • the satellite cannot always serve a certain terminal device. Even if the random access response window is running, the terminal device cannot receive downlink data. Ineffective monitoring will also waste the energy consumption of the terminal device.
  • the embodiments of the present application provide a communication method and related equipment, which can ensure the normal random access of terminal devices in the NTN beam hopping scenario (or understood as a scenario with limited satellite power).
  • the random access response window is run during the first activation time period when the network device sends downlink data, and the random access response window is not run during the first inactive time period when the network device does not send downlink data.
  • it can reduce the invalid reception of the terminal device in the first inactive time period, saving the energy consumption of the terminal device.
  • Steps 401 to 404 may be performed by a communication device, or may be performed by some components in the communication device (such as a processor, a chip or a chip system, etc.), or may be implemented by a logic module or software that can realize all or part of the functions of the communication device.
  • the following description is taken as an example of execution by a communication device.
  • the processing performed by a single execution subject in steps 401 to 404 may also be divided into executions by multiple execution subjects, and these execution subjects may be logically and/or physically separated.
  • the processing performed by the communication device may be divided into executions by at least one of a CU, a DU and a RU. Steps 401 to 404 are described in detail below.
  • the communication device may include the terminal device and/or network device in Figures 1 to 2g above.
  • Step 401 The terminal device sends a preamble code to the network device.
  • the terminal device sends a preamble to the network device, and the network device receives the preamble sent by the terminal device.
  • the network device in the embodiment of the present application may be an NTN network device, for example, a GEO satellite, MEO satellite, LEO satellite, drone, high-altitude processing platform, etc. in the aforementioned communication architecture, and the specific details are not limited here.
  • the preamble in the embodiment of the present application may also be referred to as a preamble, a random access preamble (preamble), an access preamble, preamble code information, preamble information, etc., which is not specifically limited here.
  • random access uses a four-step random access, and the preamble can be understood as Msg1 in the four-step random access. It is understood that the name of Msg1 may also change based on subsequent protocol changes and is not specifically defined here.
  • RA uses two-step random access, and the preamble can be understood as part of MsgA in the two-step random access. It is understandable that the name of MsgA may also change according to subsequent protocol changes, and the specific details are not limited here.
  • the random access process involved in this application can be contention-based random access or non-contention-based random access, which is not specifically limited here. That is, the preamble code sent by the terminal device to the network device can be allocated by the network device (i.e., non-contention random access) or selected by the terminal device itself (i.e., contention-based random access), which is not specifically limited here.
  • this step 401 can also be understood as a process in which the terminal device sends a random access request to the network device.
  • the format of the preamble may include at least one of the following: preamble format 0 (Preamble Format 0), Preamble Format 1, Preamble Format 2, Preamble Format 3, Preamble Format 4, etc., and the specific format is not limited here.
  • the triggering of this step can be actively initiated by the terminal device (i.e., the terminal device actively initiates random access) or scheduled by the network device (i.e., the terminal device passively initiates random access).
  • the terminal device i.e., the terminal device actively initiates random access
  • the network device i.e., the terminal device passively initiates random access
  • the conditions for sending the preamble code can be increased.
  • a preamble code i.e., Msg1
  • This condition is related to the round-trip time (RTT), which is the transmission delay between the terminal device and the network device.
  • RTT round-trip time
  • the conditions are met including: the first time period is greater than half of the RTT.
  • the conditions are met including: the first time period is greater than the one-way delay between the terminal device and the network device, etc.
  • the conditions are met including: the first time period is greater than a time threshold.
  • the first time period is the time period between the end time of the preamble code and the end time of the second activation time period.
  • the second activation time period is the time period when the network device receives uplink data sent by the terminal device.
  • the second information (i.e., MsgA) is sent.
  • the second information includes a preamble and uplink data (also known as the payload carried by the uplink shared channel).
  • This condition is related to the RTT.
  • the conditions include: the first time period is greater than half of the RTT.
  • the conditions include: the third time period is greater than the one-way delay between the terminal device and the network device, etc.
  • the conditions include: the first time period is greater than a time threshold.
  • the delay compared with the third time period can also be multiplied by a correction coefficient according to actual needs, etc., and the specific details are not limited here.
  • the third time period is the time period between the end time of the second information and the end time of the fifth activation time period.
  • the fifth activation time period is the time period when the network device receives the uplink data sent by the terminal device.
  • the fifth activation time period may be the same as or different from the second activation time period, and the specific details are not limited here.
  • the end time of the second information may include: the end time of the preamble and/or the end time of the uplink data.
  • preamble and uplink data can be carried in the same message or in different messages.
  • resources of the preamble and the resources of the uplink data are associated (or understood to be configured in pairs).
  • the terminal device may send the preamble code once or multiple times, which is not limited here.
  • Step 402 The terminal device runs a random access response window in a first activation time period, and does not run the random access response window in a first inactivation time period.
  • the random access response window runs during the first active period and does not run during the first inactive period.
  • the random access response window is used to receive a random access response (RAR).
  • the network device after receiving the preamble, the network device sends a random access response within the first active time period, and does not send a random access response within the first inactive time period.
  • the random access response carries at least one of the following: the preamble in step 401, TA, uplink authorization instruction (UL grant), temporary cell radio network identifier (Temporary-cell radio network temporary identifier, T-CRNTI), etc.
  • the first activation time period can be interpreted in many ways. It can refer to the time period during which the network device sends downlink data to the terminal device. It can also refer to the time period during which the terminal device receives downlink data sent by the network device. It can also refer to the time period during which the network device covers or serves the terminal device. It can also refer to the time period during which the network device can transmit data (such as downlink data transmission) with the terminal device. It can also refer to the activation time period of the network device DTX. It can also refer to the activation time period of the cell DTX. It can also refer to the activation time period of the beam DTX. It can also refer to the activation time period of the fixed area DTX.
  • the first inactive time period has multiple interpretations. It may refer to a time period when the network device does not send downlink data to the terminal device. It may also refer to a time period when the terminal device does not receive downlink data sent by the network device. It may also refer to a time period when the network device does not cover or serve the terminal device. It may also refer to a time period when the network device cannot transmit data (such as downlink data transmission) with the terminal device. It may also refer to the inactive time period of the network device DTX. It may also refer to the inactive time period of the cell DTX. It may also refer to the inactive time period of the beam DTX. It may also refer to the inactive time period of the fixed area DTX.
  • the random access response window not running during the first inactive period can also be understood as the terminal device stopping receiving random access responses during the first inactive period. It can also be understood as the terminal device stopping monitoring the Physical Downlink Control Channel (PDCCH) for random access responses during the first inactive period.
  • PDCCH Physical Downlink Control Channel
  • the first activation time period and the first non-activation time period corresponding to different terminal devices are different.
  • the first active time period and the first inactive time period of terminal device 1, as well as the first active time period and the first inactive time period of terminal device 2, can be shown in FIG5 . It can be seen that the first active time period of terminal device 1 is different from the first active time period of terminal device 2, and the first inactive time period of terminal device 1 is different from the first inactive time period of terminal device 2. It is understandable that, in actual applications, the first active time period of terminal device 1 may overlap with the first active time period of terminal device 2, and the first inactive time period of terminal device 1 may overlap with the first inactive time period of terminal device 2.
  • RA uses four-step random access, and the random access response can be understood as Msg2 in the four-step random access. It is understandable that the name of Msg2 may also change according to subsequent protocol changes, and the specifics are not limited here.
  • RA uses two-step random access, and the random access response can be understood as MsgB in the two-step random access. It is understandable that the name of MsgB may also change according to subsequent protocol changes, and the specific details are not limited here.
  • the terminal device may also determine a first moment and control the operation of the random access response window based on the relationship between the first moment and the first active time period/first inactive time period.
  • the first moment may also be understood as a theoretical start or restart moment without considering the first active time period/first inactive time period.
  • the terminal device may determine the first moment in various situations based on different communication systems, which are described below respectively:
  • the first one is a communication system.
  • the first moment is the sum of the end moment of the preamble, N time domain units, and the RTT, where N is an integer.
  • time domain unit may refer to a radio frame, subframe, time slot, or Orthogonal Frequency Division Multiplexing (OFDM) symbol, without limitation.
  • end time of a preamble may refer to the end time of the last subframe of the preamble or the end time of the last slot of the preamble, without limitation.
  • the first time the end time of the preamble + 3 subframes + RTT.
  • the time domain unit is a subframe, and N is 3.
  • the terminal device sends the preamble code multiple times, and the end time of the preamble code may refer to the end time of sending the last preamble code.
  • N can be determined according to Table 1.
  • Table 1 shows an example of the value of N. In actual applications, there may be other situations, which are not specifically limited here.
  • the first moment in this case is the sum of the end moment of the preamble and the RTT.
  • the terminal device sends the preamble code multiple times, and the end time of the preamble code may refer to the subframe time when the last preamble code is sent.
  • the random access response window has not yet run.
  • the terminal device then opens the random access response window at the start of the next active time period or at a time after the start.
  • the terminal device synchronizes or resynchronizes (for example, downlink synchronization) with the network device at the start of the next active time period or at a time after the start, and opens the random access response window.
  • the RTT does not need to be completed in the next active time period, which is equivalent to the inactive time period offsetting the RTT.
  • the RTT continues to run in the first inactive time period.
  • the terminal device does not open the random access response window. It resynchronizes (for example, downlink synchronization) with the network device at the start of the next active time period or at a time after the start, and opens the random access response window. This can improve the speed at which the terminal device receives the random access response, thereby reducing the time of the random access process of the terminal device.
  • the random access response window can be directly opened at the start time of the next active time period or at a time after the start time.
  • the terminal device during the operation of the random access response window, if the first preset condition is met, the terminal device increases the first duration of the random access response window.
  • the first duration is at least one first non-activation time period, and the random access response window continues to operate during the first non-activation time period, but no random access response is received during the first non-activation time period (or it is understood that the PDCCH corresponding to the random access response is not monitored). That is, the terminal device will receive the random access response only when the random access response window is running and within the first activation time period. This method reduces the situation where the terminal device determines that the random access has failed due to not increasing the duration by increasing the first duration.
  • the first preset condition in the embodiment of the present application includes any one of the following: the first activation time period expires, the first activation time period ends, or the random access response window is within the first non-activation time period (which may refer to the start time of the first non-activation time period or other times of the first non-activation time period, etc.), etc., and is not specifically limited here.
  • the process of increasing the first duration in the above manner can be performed once or multiple times. That is, if after increasing the first duration, the random access response window is running and the first preset condition is met, the duration of at least one first inactive time period is further increased for the random access response window.
  • the random access response window continues to run during the first inactive time period, but no random access response is received.
  • the terminal device suspends the random access response window and resumes the suspended random access response window at the start time of the next active time period or at a time after the start time. For example, the terminal device synchronizes or resynchronizes (e.g., downlink synchronization) with the network device at the start time of the next active time period or at a time after the start time, and resumes the previously suspended random access response window.
  • the terminal device synchronizes or resynchronizes (e.g., downlink synchronization) with the network device at the start time of the next active time period or at a time after the start time, and resumes the previously suspended random access response window.
  • the pause-resume process in the above manner can be performed once or multiple times. That is, if after continuing to run the suspended random access response window, another random access response window runs and the first preset condition is met, the random access response window is suspended and the suspended random access response window is resumed at the start time of the next activation time period or at a time after the start time.
  • the terminal device synchronizes or resynchronizes (e.g., downlink synchronization) with the network device at the start time of the next activation time period or at a time after the start time, and runs the previously suspended random access response window.
  • the random access response window is suspended and the random access response window is resumed at the start time of the next activation time period or at a time after the start time.
  • the terminal device synchronizes or resynchronizes (e.g., downlink synchronization) with the network device at the start time of the next activation time period or at a time after the start time, and runs the previously suspended random access response window.
  • Step 403 The terminal device sends the first information to the network device. This step is optional.
  • the terminal device may send first information to the network device.
  • the first information carries an identifier of the terminal device.
  • the identifier is used to distinguish different terminal devices, that is, the identifier can uniquely indicate a terminal device.
  • the identifier is mainly used for conflict resolution in Msg4, that is, for network devices to distinguish different terminal devices.
  • the identifier may be a Cell-Radio Network Temporary Identifier (C-RNTI), a Short Term Mobile Subscriber Identity (S-TMSI), a random number, or the like.
  • C-RNTI Cell-Radio Network Temporary Identifier
  • S-TMSI Short Term Mobile Subscriber Identity
  • the identifier is a unique identifier for the terminal device in a specific cell. Otherwise, the identifier may be derived from a core network identifier or a random number, for example.
  • a condition for sending the first information can be added. That is, the first information is sent when the condition is met.
  • This condition is related to RTT.
  • the condition includes: the second time period is greater than half of the RTT.
  • the condition includes: the second time period is greater than the one-way delay between the terminal device and the network device, etc.
  • the condition includes: the second time period is greater than a time threshold.
  • the delay compared with the second time period can also be multiplied by a correction coefficient according to actual needs, etc., and the specific details are not limited here.
  • the second time period is the time period between the end time of the first information and the end time of the third activation time period.
  • the third activation time period is the time period for the network device to receive uplink data sent by the terminal device.
  • the above-mentioned conditions for transmitting the first information prevent network devices from being unable to receive the first information due to power limitations or beam hopping.
  • user 1 transmits the first information at time T1.
  • the satellite will not be able to receive the first information sent by user 1 at time T1.
  • RA uses four-step random access, and the first message can be understood as Msg3 in the four-step random access. It is understood that the name of Msg3 may also change based on subsequent protocol changes, and the specific details are not limited here. For example, after receiving Msg2, the terminal device achieves uplink synchronization and sends Msg3 on the predetermined physical uplink shared channel (PUSCH).
  • PUSCH physical uplink shared channel
  • RA uses two-step random access, and the first information can be understood as part of MsgB in the two-step random access. It is understandable that the name of MsgB may also change according to subsequent protocol changes, and the specific details are not limited here.
  • Step 404 The terminal device runs the contention resolution timer in the fourth active time period, and does not run the contention resolution timer in the fourth inactive time period. This step is optional.
  • the contention resolution timer runs during the fourth active time period, and the contention resolution timer does not run during the fourth inactive time period.
  • the contention resolution timer is used to receive a contention resolution message.
  • This step 404 is applicable to a contention-based random access procedure.
  • the network device after receiving the first information or the second information, the network device sends a contention resolution message in the fourth active time period, and does not send a contention resolution message in the fourth inactive time period.
  • the fourth activation time period has multiple interpretations. It can refer to the time period during which the network device sends downlink data to the terminal device. It can also refer to the time period during which the terminal device receives downlink data sent by the network device. It can also refer to the time period during which the network device covers or serves the terminal device. It can also refer to the time period during which the network device can transmit data (such as downlink data transmission) with the terminal device. It can also refer to the activation time period of the network device DTX. It can also refer to the activation time period of the cell DTX. It can also refer to the activation time period of the beam DTX. It can also refer to the activation time period of the fixed area DTX. The fourth activation time period is after the first activation time period.
  • the fourth inactive time period has multiple interpretations. It may refer to a time period when the network device does not send downlink data to the terminal device. It may also refer to a time period when the terminal device does not receive downlink data sent by the network device. It may also refer to a time period when the network device does not cover or serve the terminal device. It may also refer to a time period when the network device cannot transmit data (such as downlink data transmission) with the terminal device. It may also refer to an inactive time period of network device DTX. It may also refer to an inactive time period of cell DTX. It may also refer to an inactive time period of beam DTX. It may also refer to an inactive time period of fixed area DTX. The fourth inactive time period follows the first inactive time period.
  • the contention resolution timer not running during the fourth inactive period can also be understood as the terminal device stopping receiving the contention resolution timer during the fourth inactive period. It can also be understood as the terminal device stopping monitoring the PDCCH of the contention resolution message during the fourth inactive period.
  • the PDCCH can be scrambled based on the C-RNTI or based on a temporary C-RNTI (TC-RNTI), and the specific details are not limited here.
  • the fourth activation time period and the fourth non-activation time period corresponding to different terminal devices are different.
  • RA uses four-step random access, and the contention resolution message can be understood as Msg4 in the four-step random access. It is understandable that the name of Msg4 may also change according to subsequent protocol changes, and the specifics are not limited here.
  • RA uses two-step random access, and the contention resolution message can be understood as MsgB in the two-step random access. It is understandable that the name of MsgB may also change according to subsequent protocol changes, and the specifics are not limited here.
  • the terminal device may also determine a second time and control the operation of the contention resolution timer based on the relationship between the second time and the fourth active time period/fourth inactive time period.
  • the second time may also be understood as a theoretical start or restart time without considering the fourth active time period/fourth inactive time period.
  • the second time is the sum of the end time of Msg3 and the RTT.
  • the end time of Msg3 may refer to the end time of the last subframe of the preamble code or the time of the last slot of Msg3, etc., which is not limited here.
  • the terminal device sends Msg3 multiple times, and the end time of Msg3 may refer to the end time of sending the last Msg3.
  • the second time is the subframe time after the PUSCH transmission corresponding to Msg3 ends plus the RTT.
  • the second time is the end time of Msg3 transmission plus the first symbol of the RTT.
  • the contention resolution timer has not yet run. Or it can be understood that the second moment is in the fourth inactive time period.
  • the terminal device then starts the contention resolution timer at the start of the next activation time period or at a moment after the start. For example, the terminal device synchronizes or resynchronizes (such as downlink synchronization) with the network device at the start of the next activation time period or at a moment after the start, and starts the contention resolution timer.
  • the RTT does not need to be completed in the next activation time period, which is equivalent to the inactive time period offsetting the RTT. This can improve the speed at which the terminal device receives the contention resolution timer, thereby reducing the time of the random access process of the terminal device.
  • the contention resolution timer can be directly started at the start time of the next active time period or at a time after the start time.
  • the terminal device adds a second duration to the contention resolution timer.
  • the second duration is at least one fourth non-activated time period, and the contention resolution timer continues to run during the fourth non-activated time period, but no contention resolution message is received during the fourth non-activated time period (or it is understood that the PDCCH corresponding to the contention resolution message is not monitored). That is, the terminal device will receive the contention resolution message only when the contention resolution timer is running and in the fourth activated time period. This method reduces the situation where the terminal device determines that random access has failed due to not increasing the duration by increasing the second duration.
  • the second preset condition in the embodiment of the present application includes any one of the following: expiration of the fourth activation time period, expiration of the fourth activation time period, or the contention resolution timer being within the fourth inactive time period (which may refer to the start time of the fourth inactive time period or other time of the fourth inactive time period, etc.), etc., and is not specifically limited here.
  • expiration can be understood as the timer being closed due to a failure to receive a contention resolution message
  • expiration can be understood as the timer being triggered to close after the terminal device receives the contention resolution message.
  • the process of increasing the second duration in the above manner can be performed once or multiple times. That is, if after increasing the second duration, the contention resolution timer is running again and the second preset condition is met, the contention resolution timer is further increased by at least the first and fourth inactive time periods.
  • the contention resolution timer continues to run during the fourth inactive time period, but no contention resolution message is received.
  • the terminal device suspends the contention resolution timer and resumes the suspended contention resolution timer at the start time of the next active time period or at a time after the start time. For example, the terminal device synchronizes or resynchronizes (e.g., downlink synchronization) with the network device at the start time of the next active time period or at a time after the start time, and resumes the previously suspended contention resolution timer.
  • the terminal device synchronizes or resynchronizes (e.g., downlink synchronization) with the network device at the start time of the next active time period or at a time after the start time, and resumes the previously suspended contention resolution timer.
  • the pause-and-resume process in the above-described manner can be performed once or multiple times. That is, if after resuming the paused contention resolution timer, the contention resolution timer is again running and the second preset condition is met, the contention resolution timer is again paused and resumed at the start time of the next active time period or at a time after the start time.
  • the contention resolution timer is suspended and continues to run at the start time of the next activation time period or at a time after the start time.
  • the terminal device synchronizes or resynchronizes (e.g., downlink synchronization) with the network device at the start time of the next activation time period or at a time after the start time, and runs the suspended contention resolution timer.
  • the activation time period or inactivation time period involved in the embodiments of the present application may refer to a single time period or to multiple periodic time periods, and the specific details are not limited here.
  • the activation time period involved in the embodiments of the present application may refer to different activation time periods within a periodic activation time period (for example, the lengths of the multiple activation time periods are the same).
  • the inactivation time period involved in the embodiments of the present application may refer to different inactivation time periods within a periodic inactivation time period (for example, the lengths of the multiple inactivation time periods are the same).
  • a random access response window is executed during the first active time period when the network device sends downlink data, and the random access response window is not executed during the first inactive time period when the network device does not send downlink data.
  • this method can reduce ineffective monitoring by the terminal device during the first inactive time period, thereby saving energy consumption of the terminal device.
  • a contention resolution timer is executed during the fourth active time period when the network device sends downlink data, and the contention resolution timer is not executed during the fourth inactive time period when the network device does not send downlink data.
  • this method can reduce ineffective monitoring by the terminal device during the fourth inactive time period, thereby saving energy consumption of the terminal device.
  • the terminal device when sending data to the network device, the terminal device considers the RTT, that is, limits the conditions for sending data. This can prevent the network device from being unable to receive data sent by the terminal device due to power limitation or beam hopping.
  • the network device may also send at least one of the following to the terminal device: instruction information, configuration information.
  • the terminal device receives the at least one of the above items sent by the network device.
  • the indication information is used to indicate that the power of the network device is limited or to indicate that the network device uses a beam hopping method to serve the terminal device.
  • the network device may not send the indication information.
  • the terminal device may implicitly indicate the power limitation of the network device or instruct the network device to use beam hopping to serve the terminal device through certain fields or pre-configuration.
  • the configuration information may be used to indicate at least one of the following: a first active time period, a first inactive time period, a second active time period, a third active time period, a fourth active time period, a fourth inactive time period, etc.
  • the configuration information may also include at least one of the following resources used by the terminal device to transmit data: time domain resources, frequency domain resources, code domain resources, spatial domain resources, etc.
  • the granularity of the configuration information can be cell granularity, beam granularity, fixed area granularity, etc., which is not limited here.
  • the communication method in the embodiment of the present application is described above.
  • the communication device in the embodiment of the present application is described below.
  • Figure 12 is an embodiment of a communication device 1200 in the embodiment of the present application.
  • the communication device 1200 can implement the functions of the terminal device in the above method embodiment, and thus can also achieve the beneficial effects of the above method embodiment.
  • the communication device 1200 can be a communication device, or it can be an integrated circuit or component inside the communication device, such as a chip.
  • the communication device 1200 includes: a transceiver unit 1201 and a processing unit 1202. Or the communication device 1200 includes: a transceiver unit 1201.
  • the communication device 1200 is the terminal device in the embodiments shown in FIG. 1 to FIG. 11 .
  • the functions of the various units are as follows:
  • the transceiver unit 1201 is configured to send a preamble
  • Processing unit 1202 is used to run a random access response window within a first activation time period, where the first activation time period is a time period in which the network device sends downlink data to the terminal device, and the random access response window is used to receive a random access response; the random access response window does not run within a first inactive time period, where the first inactive time period is a time period in which the network device does not send downlink data to the terminal device.
  • the processing unit 1202 is also used to determine a first moment, where the first moment is the sum of the end moment of the preamble code and the round-trip time RTT, or the first moment is the sum of the end moment of the preamble code, N time domain units and RTT, where RTT is the round-trip time between the terminal device and the network device, and N is an integer; the processing unit 1202 is also used to open a random access response window at the start moment of the next activation time period or at a certain moment after the start moment when the first moment is in the first non-activation time period.
  • the first time period is greater than half of the round-trip time RTT between the terminal device and the network device.
  • the first time period is the time period between the end time of the preamble code and the end time of the second activation time period.
  • the second activation time period is the time period for the network device to receive uplink data sent by the terminal device.
  • the processing unit 1202 is further configured to, during the operation of the random access response window, if a first preset condition is met, add a first duration to the random access response window, where the first duration is at least one first inactive time period, continue to operate the random access response window during the first inactive time period, and do not receive a random access response during the first inactive time period;
  • the first preset condition includes any one of the following: expiration of the first activation time period, end of the first activation time period, or the random access response window is within the first inactive time period.
  • the processing unit 1202 is further configured to, during the operation of the random access response window, if a first preset condition is met, suspend the random access response window, and resume the suspended random access response window at a start time of a next activation time period or a time after the start time;
  • the first preset condition includes any one of the following: expiration of the first activation time period, end of the first activation time period, or the random access response window is within the first inactive time period.
  • the transceiver unit 1201 is also used to receive a random access response within the random access response window; the transceiver unit 1201 is also used to send the first information when the second time period is greater than half of the RTT, the first information carries the identifier of the terminal device, the second time period is the time period between the end time of the first information and the end time of the third activation time period, and the third activation time period is the time period for the network device to receive uplink data sent by the terminal device.
  • the processing unit 1202 is also used to run a contention resolution timer during a fourth activation time period, where the fourth activation time period is a time period during which the network device sends downlink data to the terminal device.
  • the fourth activation time period is after the first activation time period, and the contention resolution timer is used to receive contention resolution messages.
  • the contention resolution timer does not run during a fourth inactive time period, where the fourth inactive time period is a time period during which the network device does not send downlink data to the terminal device.
  • the processing unit 1202 is also used to determine a second moment, where the second moment is the sum of the end moment of the first information and the RTT, or the second moment is the sum of the end moment of the first information, N time domain units and the RTT, where N is a positive integer; the processing unit 1202 is also used to start the contention resolution timer at the start moment of the next activation time period or at a certain moment after the start moment when the second moment is in the fourth inactive time period.
  • the processing unit 1202 is further configured to, when a second preset condition is met during the running of the contention resolution timer, increase a second duration for the contention resolution timer, where the second duration is at least one fourth inactive time period; the contention resolution timer continues to run during the fourth inactive time period, but no contention resolution message is received during the fourth inactive time period;
  • the second preset condition includes any one of the following: expiration of the fourth active time period, end of the fourth active time period, or the contention resolution timer is within the fourth inactive time period.
  • the processing unit 1202 is further configured to, when a second preset condition is satisfied during the running of the contention resolution timer, suspend the contention resolution timer, and resume running the suspended contention resolution timer at a start time of the next activation time period or at a time after the start time;
  • the second preset condition includes any one of the following: expiration of the fourth active time period, end of the fourth active time period, or the contention resolution timer is within the fourth inactive time period.
  • the transceiver unit 1201 is specifically used to send the second information when the third time period is greater than half of the round-trip time RTT between the terminal device and the network device.
  • the third time period is the time period between the end time of the second information and the end time of the fifth activation time period.
  • the second information includes the preamble code and the effective load carried by the uplink shared channel.
  • the end time of the second information includes the end time of the preamble code and/or the end time of the uplink data.
  • the fifth activation time period is the time period for the network device to receive the uplink data sent by the terminal device.
  • the transceiver unit 1201 is also used to receive configuration information sent by the network device, where the configuration information is used to indicate at least one of the following: a first activation time period, a first non-activation time period, a second activation time period, a third activation time period, a fourth activation time period, and a fourth non-activation time period.
  • the second activation time period is a time period in which the network device receives uplink data sent by the terminal device.
  • the third activation time period is a time period in which the network device receives uplink data from the terminal device.
  • the fourth activation time period is a time period in which the network device sends downlink data to the terminal device.
  • the fourth activation time period is after the first activation time period.
  • the fourth non-activation time period is a time period in which the network device does not send downlink data to the terminal device.
  • each unit in the communication device is similar to the description of the terminal equipment in the embodiments shown in Figures 1 to 11 above, and will not be repeated here.
  • processing unit 1202 executes a random access response window during a first active time period in which the network device sends downlink data.
  • the random access response window is not executed during a first inactive time period in which the network device does not send downlink data.
  • this method can reduce ineffective monitoring by the terminal device during the first inactive time period, thereby saving energy consumption of the terminal device.
  • the communication device 1200 is the network device in the embodiments shown in FIG. 1 to FIG. 11 .
  • the functions of the various units are as follows:
  • the transceiver unit 1201 is configured to receive a preamble
  • the transceiver unit 1201 is also used to send a random access response within a first activation time period, where the first activation time period is a time period in which the network device sends downlink data to the terminal device. No random access response is sent within a first inactive time period, where the network device does not send downlink data to the terminal device.
  • the transceiver unit 1201 is also used to receive first information, which carries an identifier of the terminal device; the transceiver unit 1201 is also used to send a contention resolution message within a fourth activation time period, which is a time period in which the network device sends downlink data to the terminal device, and no contention resolution message is sent within the fourth inactive time period, which is a time period in which the network device does not send downlink data to the terminal device, and the fourth activation time period is after the first activation time period.
  • the transceiver unit 1201 is further configured to receive second information, where the second information includes a preamble code and a valid payload carried by an uplink shared channel.
  • the transceiver unit 1201 is also used to send configuration information, and the configuration information is used to indicate at least one of the following: a first activation time period, a first non-activation time period, a second activation time period, a third activation time period, a fourth activation time period, and a fourth non-activation time period.
  • the second activation time period is a time period in which the network device receives uplink data sent by the terminal device.
  • the third activation time period is a time period in which the network device receives uplink data from the terminal device.
  • the fourth activation time period is a time period in which the network device sends downlink data to the terminal device.
  • the fourth activation time period is after the first activation time period.
  • the fourth non-activation time period is a time period in which the network device does not send downlink data to the terminal device.
  • each unit in the communication device is similar to the description of the network devices in the embodiments shown in Figures 1 to 11 above, and will not be repeated here.
  • the transceiver unit 1201 sends a random access response during the first active time period, and does not send a random access response during the first inactive time period. Compared to the prior art in which whether to receive a random access response is determined solely based on whether the random access response window is running, this can reduce ineffective monitoring by the terminal device during the first inactive time period, thereby saving energy consumption of the terminal device.
  • FIG 13 is another schematic structural diagram of a communication device 1300 provided in this application.
  • the communication device 1300 includes a logic circuit 1301 and an input/output interface 1302.
  • the communication device 1300 may be a chip or an integrated circuit.
  • the transceiver unit 1201 shown in FIG12 may be a communication interface, which may be the input/output interface 1302 in FIG13 , which may include an input interface and an output interface.
  • the communication interface may be a transceiver circuit, which may include an input interface circuit and an output interface circuit.
  • the processing unit 1202 shown in FIG12 may be the logic circuit 1301 in FIG13 .
  • the logic circuit 1301 is configured to perform at least one of the following: determine that a random access response window is to be executed during the first active time period, and that the random access response window is not to be executed during the first inactive time period.
  • the input/output interface 1302 is configured to perform at least one of the following: transmit a preamble, transmit first information, transmit second information, receive configuration information, receive a random access response, receive a contention resolution message, etc.
  • the input and output interface 1302 is used for at least one of the following: receiving a preamble code, receiving first information, receiving second information, sending configuration information, sending a random access response, sending a contention resolution message, etc.
  • the logic circuit 1301 and the input/output interface 1302 may also execute other steps executed by the terminal device or the network device in any embodiment and achieve corresponding beneficial effects, which will not be described in detail here.
  • the logic circuit 1301 may be a processing device, and the functions of the processing device may be partially or entirely implemented by software.
  • the functions of the processing device may be partially or entirely implemented by software.
  • the processing device may include a memory and a processor, wherein the memory is used to store a computer program, and the processor reads and executes the computer program stored in the memory to perform corresponding processing and/or steps in any one of the method embodiments.
  • the processing device may include only a processor.
  • a memory for storing the computer program is located outside the processing device, and the processor is connected to the memory via circuits/wires to read and execute the computer program stored in the memory.
  • the memory and processor may be integrated or physically separate.
  • the processing device may be one or more chips, or one or more integrated circuits.
  • the processing device may be one or more field-programmable gate arrays (FPGAs), application-specific integrated circuits (ASICs), system-on-chips (SoCs), central processing units (CPUs), network processors (NPs), digital signal processing circuits (DSPs), microcontrollers (MCUs), programmable logic devices (PLDs), or other integrated chips, or any combination of the above chips or processors.
  • FPGAs field-programmable gate arrays
  • ASICs application-specific integrated circuits
  • SoCs system-on-chips
  • CPUs central processing units
  • NPs network processors
  • DSPs digital signal processing circuits
  • MCUs microcontrollers
  • PLDs programmable logic devices
  • FIG. 14 shows a communication device 1400 involved in the above embodiments provided in an embodiment of the present application.
  • the communication device 1400 may be a communication device serving as a terminal device in the above embodiments.
  • the communication device 1400 may include but is not limited to at least one processor 1401 and a communication port 1402 .
  • the transceiver unit 1201 shown in FIG12 may be a communication interface, which may be the communication port 1402 in FIG14 , which may include an input interface and an output interface.
  • the communication port 1402 may be a transceiver circuit, which may include an input interface circuit and an output interface circuit.
  • the communication port 1402 in FIG. 14 can be used to transmit at least one of the following: a preamble, first information, second information, a random access response, a contention resolution message, configuration information, etc.
  • the communication port 1402 is used for at least one of the following: transmitting a preamble, transmitting the first information, transmitting the second information, receiving configuration information, receiving a random access response, receiving a contention resolution message, etc.
  • the communication port 1402 is used for at least one of the following: receiving a preamble, receiving the first information, receiving the second information, transmitting configuration information, transmitting a random access response, transmitting a contention resolution message, etc.
  • the device may also include at least one of a memory 1403 and a bus.
  • the at least one processor 1401 is used to control and process the actions of the communication device 1400.
  • processor 1401 can be a central processing unit, a general-purpose processor, a digital signal processor, an application-specific integrated circuit, a field-programmable gate array or other programmable logic device, a transistor logic device, a hardware component, or any combination thereof. It can implement or execute the various exemplary logic blocks, modules, and circuits described in conjunction with the disclosure of this application.
  • the processor can also be a combination that implements computing functions, such as a combination of one or more microprocessors, a combination of a digital signal processor and a microprocessor, and so on.
  • the present application does not limit the number of components shown in Figure 14.
  • the number of processors 1401, the number of communication ports 1402, and the number of memories 1403 can be one or more, and are not specifically limited here.
  • the communication device 1400 shown in Figure 14 can be specifically used to implement the steps implemented by the terminal device in the aforementioned method embodiment and achieve the corresponding technical effects of the terminal device.
  • the specific implementation methods of the communication device shown in Figure 14 can refer to the description in the aforementioned method embodiment and will not be repeated here.
  • Figure 15 is a structural diagram of the communication device 1500 involved in the above-mentioned embodiments provided in an embodiment of the present application.
  • the communication device 1500 can specifically be a communication device serving as a network device in the above-mentioned embodiments, wherein the structure of the communication device can refer to the structure shown in Figure 15.
  • the communication device 1500 includes at least one processor 1511 and at least one network interface 1514. Further optionally, the communication device also includes at least one memory 1512, at least one transceiver 1513 and one or more antennas 1515.
  • the processor 1511, the memory 1512, the transceiver 1513 and the network interface 1514 are connected, for example, via a bus. In an embodiment of the present application, the connection may include various interfaces, transmission lines or buses, etc., which are not limited in this embodiment.
  • the antenna 1515 is connected to the transceiver 1513.
  • the network interface 1514 is used to enable the communication device to communicate with other communication devices through a communication link.
  • the network interface 1514 may include a network interface between the communication device and the core network device, such as an S1 interface, and the network interface may include a network interface between the communication device and other communication devices (such as other network devices or core network devices), such as an X2 or Xn interface.
  • the transceiver unit 1201 shown in FIG12 may be a communication interface, which may be the network interface 1514 in FIG15 , which may include an input interface and an output interface.
  • the network interface 1514 may be a transceiver circuit, which may include an input interface circuit and an output interface circuit.
  • Processor 1511 is primarily used to process communication protocols and communication data, control the entire communication device, execute software programs, and process software program data, for example, to support the communication device in performing the actions described in the embodiments.
  • a communication device may include a baseband processor and a central processing unit.
  • the baseband processor is primarily used to process communication protocols and communication data, while the central processing unit is primarily used to control the entire communication device, execute software programs, and process software program data.
  • Processor 1511 in Figure 15 may integrate the functions of both a baseband processor and a central processing unit.
  • the baseband processor and the central processing unit may also be independent processors interconnected via a bus or other technology.
  • a communication device may include multiple baseband processors to accommodate different network standards, multiple central processing units to enhance processing capabilities, and various components of the communication device may be connected via various buses.
  • the baseband processor may also be referred to as a baseband processing circuit or a baseband processing chip.
  • the central processing unit may also be referred to as a central processing circuit or a central processing chip.
  • the functionality for processing communication protocols and communication data may be built into the processor or stored in memory as a software program, which is executed by the processor to implement the baseband processing functionality.
  • the memory is primarily used to store software programs and data.
  • Memory 1512 may be independent and connected to processor 1511. Alternatively, memory 1512 may be integrated with processor 1511, for example, within a single chip.
  • Memory 1512 can store program code for executing the technical solutions of the embodiments of the present application, and execution is controlled by processor 1511. The various computer program codes executed may also be considered drivers for processor 1511.
  • Figure 15 shows only one memory and one processor. In an actual communication device, there may be multiple processors and multiple memories.
  • the memory may also be referred to as a storage medium or storage device.
  • the memory may be a storage element on the same chip as the processor, i.e., an on-chip storage element, or an independent storage element, which is not limited in the embodiments of the present application.
  • the transceiver 1513 can be used to support the reception or transmission of radio frequency signals between the communication device and the terminal.
  • the transceiver 1513 can be connected to the antenna 1515.
  • the transceiver 1513 includes a transmitter Tx and a receiver Rx. Specifically, one or more antennas 1515 can receive radio frequency signals.
  • the receiver Rx of the transceiver 1513 is used to receive the radio frequency signal from the antenna, convert the radio frequency signal into a digital baseband signal or a digital intermediate frequency signal, and provide the digital baseband signal or digital intermediate frequency signal to the processor 1511 so that the processor 1511 can further process the digital baseband signal or digital intermediate frequency signal, such as demodulation and decoding.
  • the transmitter Tx in the transceiver 1513 is also used to receive a modulated digital baseband signal or digital intermediate frequency signal from the processor 1511, convert the modulated digital baseband signal or digital intermediate frequency signal into a radio frequency signal, and transmit the radio frequency signal through one or more antennas 1515.
  • the receiver Rx can selectively perform one or more stages of down-mixing and analog-to-digital conversion on the RF signal to obtain a digital baseband signal or a digital intermediate frequency signal.
  • the order of the down-mixing and analog-to-digital conversion processes is adjustable.
  • the transmitter Tx can selectively perform one or more stages of up-mixing and digital-to-analog conversion on the modulated digital baseband signal or digital intermediate frequency signal to obtain a RF signal.
  • the order of the up-mixing and digital-to-analog conversion processes is adjustable.
  • the digital baseband signal and the digital intermediate frequency signal may be collectively referred to as digital signals.
  • the transceiver 1513 may also be referred to as a transceiver unit, a transceiver, a transceiver device, etc.
  • a device in the transceiver unit that implements a receiving function may be referred to as a receiving unit
  • a device in the transceiver unit that implements a transmitting function may be referred to as a transmitting unit. That is, the transceiver unit includes a receiving unit and a transmitting unit.
  • the receiving unit may also be referred to as a receiver, an input port, a receiving circuit, etc.
  • the transmitting unit may be referred to as a transmitter, a transmitter, or a transmitting circuit, etc.
  • the communication device 1500 shown in Figure 15 can be specifically used to implement the steps implemented by the network device in the aforementioned method embodiment, and to achieve the corresponding technical effects of the network device.
  • the specific implementation method of the communication device 1500 shown in Figure 15 can refer to the description in the aforementioned method embodiment, and will not be repeated here.
  • the terminal chip implements the functions of the terminal in the above-mentioned method embodiment.
  • the terminal chip receives information from other modules in the terminal (such as a radio frequency module or antenna), and the information is sent by the base station to the terminal; or the terminal chip sends information to other modules in the terminal (such as a radio frequency module or antenna), and the information is sent by the terminal to the base station.
  • the terminal sending the indication information can be understood as the process of the terminal chip outputting the indication information.
  • the base station module implements the functions of the base station in the above-mentioned method embodiment.
  • the base station module receives information from other modules in the base station (such as a radio frequency module or an antenna), and the information is sent by the terminal to the base station; or, the base station module sends information to other modules in the base station (such as a radio frequency module or an antenna), and the information is sent by the base station to the terminal.
  • the base station module here can be a baseband chip of the base station, or it can be a DU or other module.
  • the DU here can be a DU under the open radio access network (O-RAN) architecture.
  • O-RAN open radio access network
  • the base station sending indication information can be understood as the process of the base station chip outputting indication information.
  • the method steps in the embodiments of the present application can be implemented in hardware or in software instructions that can be executed by a processor.
  • the software instructions can be composed of corresponding software modules, and the software modules can be stored in random access memory, flash memory, read-only memory, programmable read-only memory, erasable programmable read-only memory, electrically erasable programmable read-only memory, registers, hard disk, mobile hard disk, CD-ROM or any other form of storage medium well known in the art.
  • An exemplary storage medium is coupled to the processor so that the processor can read information from the storage medium and write information to the storage medium.
  • the storage medium can also be an integral part of the processor.
  • the processor and storage medium can be located in an ASIC.
  • the ASIC can be located in a base station or a terminal.
  • the processor and storage medium can also exist in a base station or a terminal as discrete components.
  • all or part of the embodiments may be implemented using software, hardware, firmware, or any combination thereof.
  • all or part of the embodiments may be implemented in the form of a computer program product.
  • the computer program product includes one or more computer programs or instructions. When the computer program or instructions are loaded and executed on a computer, the processes or functions described in the embodiments of the present application are performed in whole or in part.
  • the computer may be a general-purpose computer, a special-purpose computer, a computer network, a network device, a user device, or other programmable device.
  • the computer program or instructions may be stored in a computer-readable storage medium or transferred from one computer-readable storage medium to another.
  • the computer program or instructions may be transferred from one website, computer, server, or data center to another website, computer, server, or data center via wired or wireless 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 that integrates one or more available media.
  • the available medium may be a magnetic medium, such as a floppy disk, hard disk, or magnetic tape; an optical medium, such as a digital video disk; or a semiconductor medium, such as a solid-state drive.
  • the computer-readable storage medium may be a volatile or nonvolatile storage medium, or may include both volatile and nonvolatile types of storage media.

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Physics & Mathematics (AREA)
  • Astronomy & Astrophysics (AREA)
  • General Physics & Mathematics (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

Les modes de réalisation de la présente demande concernent un procédé de communication, qui peut être appliqué à des procédures d'accès aléatoire. Le procédé consiste à : exécuter une fenêtre de réponse d'accès aléatoire dans une première période de temps active lorsqu'un dispositif de réseau envoie des données de liaison descendante, la fenêtre de réponse d'accès aléatoire ne s'exécutant pas dans une première période de temps inactive lorsque le dispositif de réseau n'envoie pas de données de liaison descendante, et la fenêtre de réponse d'accès aléatoire étant utilisée pour recevoir une réponse d'accès aléatoire. Par comparaison avec l'état de la technique selon lequel il est déterminé s'il faut recevoir une réponse d'accès aléatoire uniquement sur la base de si une fenêtre de réponse d'accès aléatoire est en cours d'exécution ou non, la présente demande peut réduire la surveillance invalide d'équipements terminaux dans la première période de temps inactive, ce qui permet de réduire la consommation d'énergie des équipements terminaux.
PCT/CN2025/079839 2024-03-15 2025-02-28 Procédé de communication et dispositif associé Pending WO2025190093A1 (fr)

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Citations (4)

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Publication number Priority date Publication date Assignee Title
CN111727658A (zh) * 2018-02-14 2020-09-29 Idac控股公司 非地面网络中的随机接入
US20210212129A1 (en) * 2018-09-26 2021-07-08 Huawei Technologies Co., Ltd. Random Access Preamble Sending Method, Random Access Preamble Receiving Method, and Communications Apparatus
CN114026949A (zh) * 2020-05-18 2022-02-08 上海诺基亚贝尔股份有限公司 用于随机接入过程的方法和装置
CN114503711A (zh) * 2019-12-17 2022-05-13 Oppo广东移动通信有限公司 激活时段确认方法及装置

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111727658A (zh) * 2018-02-14 2020-09-29 Idac控股公司 非地面网络中的随机接入
US20210212129A1 (en) * 2018-09-26 2021-07-08 Huawei Technologies Co., Ltd. Random Access Preamble Sending Method, Random Access Preamble Receiving Method, and Communications Apparatus
CN114503711A (zh) * 2019-12-17 2022-05-13 Oppo广东移动通信有限公司 激活时段确认方法及装置
CN114026949A (zh) * 2020-05-18 2022-02-08 上海诺基亚贝尔股份有限公司 用于随机接入过程的方法和装置

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