WO2021031907A1 - 非授权频段的随机接入消息发送方法和终端 - Google Patents

非授权频段的随机接入消息发送方法和终端 Download PDF

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Publication number
WO2021031907A1
WO2021031907A1 PCT/CN2020/108231 CN2020108231W WO2021031907A1 WO 2021031907 A1 WO2021031907 A1 WO 2021031907A1 CN 2020108231 W CN2020108231 W CN 2020108231W WO 2021031907 A1 WO2021031907 A1 WO 2021031907A1
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Prior art keywords
random access
access channel
starting time
time point
channels
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PCT/CN2020/108231
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English (en)
French (fr)
Inventor
沈晓冬
潘学明
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维沃移动通信有限公司
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Publication of WO2021031907A1 publication Critical patent/WO2021031907A1/zh

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W74/00—Wireless channel access
    • H04W74/08—Non-scheduled access, e.g. ALOHA
    • H04W74/0833—Random access procedures, e.g. with 4-step access
    • 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 disclosure relates to the field of communication technologies, and in particular to a method and terminal for sending random access messages in an unlicensed frequency band.
  • the sending of random access messages usually requires listen before talk (LBT). Only when the LBT is successful will the random access message be sent. send.
  • LBT listen before talk
  • the terminal or network equipment needs to perform channel idle estimation (Clear Channel Assess, CCA) or extended channel idle estimation (extended Clear Channel Assess, eCCA) to listen to the channel, that is, perform Energy Detection (ED), when the energy is low
  • CCA channel idle estimation
  • eCCA extended Clear Channel Assess
  • the terminal that usually performs initial access selects a synchronization signal block (Synchronization Signal and PBCH block, SSB), and then uses the random access channel location (Random Access Channel occasion, RACH occasion) corresponding to the SSB after selecting a synchronization signal block (SSB).
  • RACH occasion is randomly selected with equal probability for random access. If the LBT fails on the RACH occasion and the random access message cannot be sent, the random access message needs to be sent in the next RACH associated cycle. This will cause a longer delay for random access.
  • the embodiments of the present disclosure provide a method and a terminal for sending random access messages in an unlicensed frequency band, so as to solve the problem of large delay in random access.
  • embodiments of the present disclosure provide a method for sending random access messages in an unlicensed frequency band, which is applied to a terminal and includes:
  • the physical layer listens first to the N1 first random access channel positions selected by the upper layer and then speaks LBT.
  • the N1 first random access channel positions include at least one random access channel corresponding to the starting time point, and each one The starting time point includes M random access channels, and the at least one starting time point belongs to a period associated with a random access channel;
  • the physical layer sends a random access message on the target random access channel
  • N1, M, and L are all positive integers, M is less than or equal to N1, and M is greater than or equal to L, the first starting time point is one of the at least one starting time point, so The target random access channel is one random access channel among the L random access channels.
  • the embodiments of the present disclosure also provide a terminal, including:
  • the processing module is used for the physical layer to listen-to-speak LBT on the N1 first random access channel positions selected by the higher layer, and the N1 first random access channel positions include at least one random access corresponding to the starting time point Channel, and each starting time point includes M random access channels, and the at least one starting time point belongs to a period associated with a random access channel;
  • the first sending module is configured to send the random access message on the target random access channel by the physical layer when the L random access channels LBT at the first starting time point are successful;
  • N1, M, and L are all positive integers, M is less than or equal to N1, and M is greater than or equal to L, the first starting time point is one of the at least one starting time point, so The target random access channel is one random access channel among the L random access channels.
  • the embodiments of the present disclosure also provide a terminal, including: a memory, a processor, and a program stored in the memory and capable of running on the processor, and the program is implemented when the processor is executed The steps in the random access message sending method of the unlicensed frequency band.
  • the embodiments of the present disclosure also provide a computer-readable storage medium having a computer program stored on the computer-readable storage medium, and when the computer program is executed by a processor, the random access message of the aforementioned unlicensed frequency band is realized Send method steps.
  • the physical layer can perform LBT on multiple first random access channel positions selected by a higher layer in a period associated with a random access channel, and when one of the random access channel positions is successfully LBT, Send random access message. In this way, it is possible to try to send random access messages at multiple random access channel positions in one random access channel association period, thereby improving the success rate of sending random access messages and reducing the delay of random access.
  • FIG. 1 is a structural diagram of a network system applicable to an embodiment of the present disclosure
  • FIG. 2 is a flowchart of a method for sending random access messages in an unlicensed frequency band according to an embodiment of the present disclosure
  • Figure 3 is a structural diagram of a terminal provided by an embodiment of the present disclosure.
  • Fig. 4 is a structural diagram of another terminal provided by an embodiment of the present disclosure.
  • words such as “exemplary” or “for example” are used as examples, illustrations, or illustrations. Any embodiment or design solution described as “exemplary” or “for example” in the embodiments of the present disclosure should not be construed as being more preferable or advantageous than other embodiments or design solutions. To be precise, words such as “exemplary” or “for example” are used to present related concepts in a specific manner.
  • the embodiments of the present disclosure are described below with reference to the drawings.
  • the method and terminal for sending random access messages in an unlicensed frequency band provided by the embodiments of the present disclosure can be applied to a wireless communication system.
  • the wireless communication system may adopt a 5G system, or an evolved long term evolution (evolved Long Term Evolution, eLTE) system, or a subsequent evolved communication system.
  • eLTE evolved Long Term Evolution
  • FIG. 1 is a structural diagram of a network system applicable to an embodiment of the present disclosure. As shown in FIG. 1, it includes a terminal 11 and a network device 12.
  • the terminal 11 may be a user terminal or other terminal-side devices. , Such as: mobile phone, tablet computer (Tablet Personal Computer), laptop computer (Laptop Computer), personal digital assistant (personal digital assistant, PDA), mobile Internet device (Mobile Internet Device, MID) or wearable device (Wearable) Device) and other terminal-side devices.
  • PDA personal digital assistant
  • mobile Internet device Mobile Internet Device, MID
  • wearable device wearable device
  • the above-mentioned network device 12 may be a 5G base station, or a later version base station, or a base station in other communication systems, or it is called Node B, Evolved Node B, or Transmission Reception Point (TRP), or access point (Access Point, AP), or other words in the field, as long as the same technical effect is achieved, the network device is not limited to specific technical words.
  • the aforementioned network device 12 may be a master node (Master Node, MN) or a secondary node (Secondary Node, SN). It should be noted that, in the embodiments of the present disclosure, only a 5G base station is taken as an example, but the specific type of network equipment is not limited.
  • FIG. 2 is a flowchart of a method for sending random access messages in an unlicensed frequency band according to an embodiment of the present disclosure. The method is applied to a terminal, as shown in FIG. 2, and includes the following steps:
  • Step 201 The physical layer listens first and then speaks LBT on the N1 first random access channel positions selected by the higher layer.
  • the N1 first random access channel positions include at least one random access channel corresponding to the starting time point.
  • each starting time point includes M random access channels, and the at least one starting time point belongs to a period associated with a random access channel;
  • Step 202 In the case that the L random access channels LBT at the first starting time point are successful, the physical layer sends a random access message on the target random access channel;
  • N1, M, and L are all positive integers, M is less than or equal to N1, and M is greater than or equal to L, the first starting time point is one of the at least one starting time point, so The target random access channel is one random access channel among the L random access channels.
  • the mapping relationship between random access resources and SSBs is configured through the high-level parameter ssb-perRACH-OccasionAndCB-PreamblesPerSSB to obtain a resource location (Resource occasion, RO) associated SSB number N and each SSB The number of PRACH preambles valid on RO.
  • the resource location can also be understood as a random access channel location
  • the N1 first random access channel locations are RACH occasions selected by the higher layer from consecutive candidate random access channel locations .
  • the candidate random access channel position may be the RACH occasion associated with one or more SSBs. Specifically, the candidate random access channel positions are shown in Table 1 below.
  • RO#0 to RO#15 respectively represent resource positions numbered 0-15 in the candidate random access channel positions.
  • Each column in Table 1 represents a starting time point
  • RO#0 ⁇ RO#7 are associated with SSB numbered 0 (SSB#0)
  • RO#8 ⁇ RO#15 are associated with SSB numbered 1 (SSB#1)
  • SSB#1 SSB numbered 1
  • the N1 first random access channel positions selected by the upper layer may include one or more random access channel positions at the starting time point. One or more random access channel positions can be selected within each starting time point.
  • the physical layer performs LBT on the N1 first random access channel positions, it can perform LBT on each first random access channel position in sequence according to the starting time point.
  • a random access channel can be selected with equal probability Send random access message.
  • the physical layer can perform LBT on multiple first random access channel positions selected by a higher layer in a period associated with a random access channel, and when one of the random access channel positions is successfully LBT, Send random access message. In this way, it is possible to try to send random access messages at multiple random access channel positions in one random access channel association period, thereby improving the success rate of sending random access messages and reducing the delay of random access.
  • N1 first random access channel positions may include one or more random access channel positions at the starting time point.
  • the N1 first random access channel positions include 1 The random access channel positions at two starting time points and the random access channel positions including at least two starting time points are described in detail.
  • Solution 1 If the N1 first random access channel positions include at least two random access channel positions at the start time point, the above physical layer listens first to the N1 first random access channel positions selected by the upper layer and then speaks LBT include:
  • the high layer selects random access channels corresponding to at least two starting time points at the candidate random access channel positions to obtain the N1 first random access channels;
  • the physical layer sequentially performs LBT on the N1 first random access channels according to the starting time point.
  • the manner of selecting the N first random access channels can be set according to actual needs.
  • the higher layer selects at least two random access channels corresponding to the starting time points at the candidate random access channel positions.
  • Access channels, obtaining the N1 first random access channels includes:
  • One random access channel position is randomly selected from each group of random access channel positions in the N1 groups of random access channel positions to obtain the N1 first random access channel positions.
  • the N1 random access channel position can be selected with equal probability in the Q group random access channel position.
  • the positions of the divided Q groups of random access channels are directly determined as the N1 groups of random access channel positions.
  • the high layer selecting random access channels corresponding to at least two starting time points at the candidate random access channel positions, and obtaining the N1 first random access channels includes:
  • K random access channel positions are selected for each starting time point to obtain the N1 first random Access channel position, K is a positive integer smaller than N1.
  • the K random access channel positions are located on different frequency resource ranges.
  • the frequency resource range can be set according to actual needs. For example, in this embodiment, referring to Table 1, the first row and the second row correspond to a frequency resource range, and the third and fourth rows correspond to a frequency resource. range.
  • the upper layer may also perform the following actions:
  • the higher layer determines the relevant information of the N1 first random access channels
  • the higher layer sends the related information to the physical layer
  • the related information includes random access preamble index (PREAMBLE_INDEX), random access preamble target received power (PREAMBLE_RECEIVED_TARGET_POWER), and random access radio network temporary identifier (Random Access Radio Network Tempory Identity RA-RNTI).
  • PREAMBLE_INDEX random access preamble index
  • PREAMBLE_RECEIVED_TARGET_POWER random access preamble target received power
  • RA-RNTI random access radio network temporary identifier
  • the random access preamble index of the N1 first random access channels and the random access preamble target received power are the same;
  • the N1 first random access channels include at least two groups of first random access channels divided into at least two groups according to a preset rule, and random access preamble indexes and random access preambles of the first random access channels in the same group
  • the preamble target received power is the same.
  • the N1 RACH occasions selected by the terminal upper layer share the same selected random access preamble index and the calculated random access preamble target received power, or are divided into at least two groups (for example, according to different mapped SSBs) In each group, the same selected random access preamble index and the calculated target received power of the random access preamble are shared, and N1 RA-RNTIs calculated separately are sent to the physical layer at the same time.
  • the N1 RACH occasions selected by the higher layer are first divided into T groups according to the start time point, and the T group RACH occasions are LBT sequentially according to the start time point.
  • the method further includes:
  • the physical layer cancels the sending of the random access message on the first random access channel at a second starting time point, where the second starting time point is a starting time point after the first starting time point.
  • canceling the sending of the random access message on the RACH occasion at the second starting time point includes canceling the RACH occasion at the second starting time point to perform LBT, or it can be at the second starting time point.
  • RACH occasion LBT is successful, but random access messages are not sent.
  • one RACH occasion among the successful RACH occasions of the LBT is randomly selected to send RACH message1, and subsequent events are cancelled.
  • the random access message is sent on the RACH occasion at the initial time point, and the RA-RNTI corresponding to the selected RACH occasion is used for the subsequent process; otherwise, the RACH occasion attempt at the next time point is continued.
  • the sending of the random access message corresponding to the period of this random access channel may end.
  • the method further includes:
  • the physical layer sends a first notification message to the higher layer, and the first notification message is used to notify the physical random access due to LBT failure. Failed to send successfully;
  • the higher layer controls a first counter for counting the number of random access channel LBT failures to add N1, and the number of times recorded by the first counter is used to trigger a random access channel LBT failure recovery process.
  • Solution 2 If the N1 first random access channel positions are random access channels corresponding to a starting time point, after the physical layer sends a random access message to the target random access channel, the method further includes :
  • the higher layer randomly selects N2 random access channels on the available random access channel according to the second notification message.
  • a random access channel
  • the higher layer sends the relevant information of the N2 first random access channels to the physical layer, so that the physical layer performs LBT on the N2 first random access channels;
  • the fourth starting time point is the starting time point of the N1 first random access channel positions, and N2 is a positive integer.
  • the aforementioned N1 may be 1, or may be an integer greater than 1.
  • the upper layer can first select a starting time point with equal probability (that is, the fourth starting time point, such as the starting time point corresponding to RO#0).
  • the starting time point selects a first random access channel position (such as RO#5) with equal probability.
  • the higher layer determines the relevant information corresponding to the RO#5, and sends the relevant information to the physical layer.
  • the physical layer performs LBT on the selected first random access channel. If the first random access channel LBT fails, the physical layer sends a second notification message to the upper layer, and the upper layer will continue in the fourth based on the second notification message.
  • N1 first random access channel positions are the most recently available random access channel positions in the candidate random access channels that are located after the fourth starting time point.
  • N1 first random access channel positions may be selected from the machine access channel positions associated with one SSB each time in the unit of SSB.
  • N1 is an integer greater than 1, you can set the selected random access channel position to be in a different frequency resource range.
  • the first row and the second row correspond to a frequency resource range
  • the third row and the fourth row correspond to a frequency resource range.
  • N1 is 2
  • one random access channel position can be selected from the first row and the second row
  • a random access channel position can be selected from the third row and the fourth row each time.
  • the method further includes:
  • the higher layer controls a second counter for counting the number of random access channel LBT failures to add N1, and the number of times recorded by the counter is used to trigger a random access channel LBT failure recovery process.
  • the candidate random access channel is a random access channel corresponding to at least one synchronization signal block SSB that meets a preset condition. Into the channel.
  • the terminal may select one or more random access channels corresponding to multiple SSBs as candidate random access channels among multiple SSBs whose received power is greater than a preset threshold. As the random access message transmission is attempted on multiple SSBs, the success rate of random access message transmission can be improved, thereby reducing the random access delay.
  • the upper layer selects RACH occasion, it is also equivalent to selecting the physical uplink shared channel location (Physical Uplink Shared Channel occasion, PUSCH occasion) associated with RACH occasion. That is to say, in addition to sending relevant information about the RACH occasion to the physical layer, the upper layer also sends relevant information about the PUSCH occasion associated with the RACH occasion to the physical layer.
  • the physical uplink shared channel location Physical Uplink Shared Channel occasion, PUSCH occasion
  • the terminal upper layer selects SSB#0 for initial access, and its corresponding ROs are distributed in two time units, and these ROs are divided into two groups according to time, namely (RO#0, RO#1, RO #2, RO#3) and (RO#4, RO#5, RO#6, RO#7), randomly select an RO in each group, such as RO#2 and RO#6 and send the relevant information to the physical Floor. If the physical layer fails to attempt to send on RO#2, it continues to perform LBT on RO#6 and succeeds, and then sends a RACH message.
  • the terminal upper layer selects ROs corresponding to SSB#0 and SSB#1 for initial access, and first randomly selects an RO to try, for example, RO#6.
  • the user's physical layer fails to attempt to send on RO#6 and informs the upper layer, and the upper layer randomly selects RO#15 in the following RO to try to send and fails.
  • the physical layer informs the upper layer of the failure of this RACH sending.
  • FIG. 3 is a structural diagram of a terminal provided by an embodiment of the present disclosure. As shown in FIG. 3, the terminal 300 includes:
  • the processing module 301 is used for the physical layer to listen-to-speak LBT on the N1 first random access channel positions selected by the higher layer.
  • the N1 first random access channel positions include at least one random access point corresponding to the starting time point.
  • Each starting time point includes M random access channels, and the at least one starting time point belongs to a period associated with a random access channel;
  • the first sending module 302 is configured to send the random access message on the target random access channel by the physical layer when the L random access channels LBT at the first starting time point are successful;
  • N1, M, and L are all positive integers, M is less than or equal to N1, and M is greater than or equal to L, the first starting time point is one of the at least one starting time point, so The target random access channel is one random access channel among the L random access channels.
  • the processing module 301 includes:
  • the selection unit is used for the high layer to select random access channels corresponding to at least two starting time points at the candidate random access channel positions to obtain the N1 first random access channels;
  • the monitoring unit is used for the physical layer to perform LBT on the N1 first random access channels in sequence according to the starting time point.
  • the terminal further includes:
  • the first control module is used for the physical layer to cancel the sending of the random access message on the first random access channel at the second starting time point, where the second starting time point is after the first starting time point The starting time point.
  • the first sending module 302 is further configured to send a first notification message to the higher layer by the physical layer when the N1 first random access channel positions LBT fail, and the first The notification message is used to notify that the physical random access failed due to unsuccessful LBT transmission;
  • the second control module is used by the upper layer to control the first counter for counting the number of LBT failures of the random access channel plus N1 according to the first notification message, and the number of times recorded by the first counter is used to trigger random access Channel LBT failure recovery process.
  • the selection unit is specifically configured to: divide consecutive candidate random access channel positions into Q groups of random access channel positions according to time and/or frequency, where Q is an integer greater than or equal to N1; in the Q group Random access channel positions randomly select N1 groups of random access channel positions; in each group of random access channel positions in the N1 groups of random access channel positions, 1 random access channel position is randomly selected to obtain the N1 The first random access channel position.
  • the selecting unit is specifically configured to: randomly select a third starting time point among the starting time points corresponding to the consecutive candidate random access channel positions; Among all the starting time points after the third starting time point, K random access channel positions are selected for each starting time point to obtain the N1 first random access channel positions, and K is a positive value smaller than N1. Integer.
  • the K random access channel positions are located on different frequency resource ranges.
  • the terminal further includes:
  • the determining module is used by the higher layer to determine the relevant information of the N1 first random access channels
  • the third sending module is used for the higher layer to send the related information to the physical layer
  • the related information includes random access preamble index, random access preamble target receiving power, and random access wireless network temporary identification.
  • the random access preamble index of the N1 first random access channels and the random access preamble target received power are the same;
  • the N1 first random access channels include at least two groups of first random access channels divided into at least two groups according to a preset rule, and random access preamble indexes and random access preambles of the first random access channels in the same group
  • the preamble target received power is the same.
  • the terminal when the N1 first random access channel positions are random access channels corresponding to a starting time point, the terminal further includes:
  • the second sending module is configured to send a second notification message by the physical layer to the higher layer, where the second notification message is used to notify all N1 first random access channels that the transmission fails;
  • the selection module is configured to, if there is still an available random access channel for the candidate random access channel after the fourth starting time point, the higher layer is in the available random access channel according to the second notification message Randomly select N2 first random access channels;
  • the third sending module is used by the higher layer to send related information of the N2 first random access channels to the physical layer, so that the physical layer performs LBT on the N2 first random access channels ;
  • the fourth starting time point is the starting time point of the N1 first random access channel positions, and N2 is a positive integer.
  • the N2 first random access channel positions are the most recently available random access channel positions in the candidate random access channels that are located after the fourth starting time point.
  • the terminal further includes:
  • the second control module is used by the higher layer to control the second counter for counting the number of random access channel LBT failures plus N1 according to the second notification message, and the count recorded by the counter is used to trigger the random access channel LBT Failure recovery process.
  • the candidate random access channel is a random access channel corresponding to at least one synchronization signal block SSB that meets a preset condition.
  • the terminal provided in the embodiment of the present disclosure can implement the various processes implemented by the terminal in the method embodiment of FIG. 2. To avoid repetition, details are not described herein again.
  • Fig. 4 is a schematic diagram of the hardware structure of a terminal for implementing various embodiments of the present disclosure.
  • the terminal 400 includes, but is not limited to: a radio frequency unit 401, a network module 402, an audio output unit 403, an input unit 404, a sensor 405, a display unit 406, a user input unit 407, an interface unit 408, a memory 409, a processor 410, and a power supply 411 and other components.
  • a radio frequency unit 401 includes, but is not limited to: a radio frequency unit 401, a network module 402, an audio output unit 403, an input unit 404, a sensor 405, a display unit 406, a user input unit 407, an interface unit 408, a memory 409, a processor 410, and a power supply 411 and other components.
  • terminal structure shown in FIG. 4 does not constitute a limitation on the terminal, and the terminal may include more or fewer components than those shown in the figure, or combine certain components, or arrange different components.
  • terminals include, but are not limited to, mobile phones, tablet computers, notebook computers, palmtop computers, vehicle-mounted terminals, wearable devices
  • the processor 410 is configured to: the physical layer listens first and then speaks LBT on the N1 first random access channel positions selected by the higher layer, and the N1 first random access channel positions include at least one random access corresponding to the starting time point.
  • Each starting time point includes M random access channels, and the at least one starting time point belongs to a period associated with a random access channel;
  • the radio frequency unit 401 is configured to, when the L random access channels LBT at the first starting time point are successful, the physical layer sends a random access message on the target random access channel;
  • N1, M, and L are all positive integers, M is less than or equal to N1, and M is greater than or equal to L, the first starting time point is one of the at least one starting time point, so The target random access channel is one random access channel among the L random access channels.
  • processor 410 and radio frequency unit 401 can implement various processes implemented by the terminal in the method embodiment of FIG. 2, and to avoid repetition, details are not described herein again.
  • the radio frequency unit 401 can be used for receiving and sending signals in the process of sending and receiving information or talking. Specifically, the downlink data from the base station is received and processed by the processor 410; Uplink data is sent to the base station.
  • the radio frequency unit 401 includes, but is not limited to, an antenna, at least one amplifier, a transceiver, a coupler, a low noise amplifier, a duplexer, and the like.
  • the radio frequency unit 401 can also communicate with the network and other devices through a wireless communication system.
  • the terminal provides users with wireless broadband Internet access through the network module 402, such as helping users to send and receive emails, browse web pages, and access streaming media.
  • the audio output unit 403 can convert the audio data received by the radio frequency unit 401 or the network module 402 or stored in the memory 409 into audio signals and output them as sounds. Moreover, the audio output unit 403 may also provide audio output related to a specific function performed by the terminal 400 (for example, call signal reception sound, message reception sound, etc.).
  • the audio output unit 403 includes a speaker, a buzzer, a receiver, and the like.
  • the input unit 404 is used to receive audio or video signals.
  • the input unit 404 may include a graphics processing unit (GPU) 4041 and a microphone 4042, and the graphics processor 4041 is configured to monitor images of still pictures or videos obtained by an image capture device (such as a camera) in a video capture mode or an image capture mode. Data is processed.
  • the processed image frame can be displayed on the display unit 406.
  • the image frame processed by the graphics processor 4041 may be stored in the memory 409 (or other storage medium) or sent via the radio frequency unit 401 or the network module 402.
  • the microphone 4042 can receive sound and can process such sound into audio data.
  • the processed audio data can be converted into a format that can be sent to a mobile communication base station via the radio frequency unit 401 in the case of a telephone call mode for output.
  • the terminal 400 also includes at least one sensor 405, such as a light sensor, a motion sensor, and other sensors.
  • the light sensor includes an ambient light sensor and a proximity sensor.
  • the ambient light sensor can adjust the brightness of the display panel 4061 according to the brightness of the ambient light.
  • the proximity sensor can close the display panel 4061 and/or when the terminal 400 is moved to the ear. Or backlight.
  • the accelerometer sensor can detect the magnitude of acceleration in various directions (usually three-axis), and can detect the magnitude and direction of gravity when stationary, and can be used to identify terminal posture (such as horizontal and vertical screen switching, related games, Magnetometer attitude calibration), vibration recognition related functions (such as pedometer, tap), etc.; sensor 405 can also include fingerprint sensors, pressure sensors, iris sensors, molecular sensors, gyroscopes, barometers, hygrometers, thermometers, infrared Sensors, etc., will not be repeated here.
  • the display unit 406 is used to display information input by the user or information provided to the user.
  • the display unit 406 may include a display panel 4061, and the display panel 4061 may be configured in the form of a liquid crystal display (LCD), an organic light-emitting diode (OLED), etc.
  • LCD liquid crystal display
  • OLED organic light-emitting diode
  • the user input unit 407 can be used to receive inputted numeric or character information, and generate key signal input related to user settings and function control of the terminal.
  • the user input unit 407 includes a touch panel 4071 and other input devices 4072.
  • the touch panel 4071 also called a touch screen, can collect user touch operations on or near it (for example, the user uses any suitable objects or accessories such as fingers, stylus, etc.) on the touch panel 4071 or near the touch panel 4071. operating).
  • the touch panel 4071 may include two parts: a touch detection device and a touch controller.
  • the touch detection device detects the user's touch position, and detects the signal brought by the touch operation, and transmits the signal to the touch controller; the touch controller receives the touch information from the touch detection device, converts it into contact coordinates, and then sends it To the processor 410, the command sent by the processor 410 is received and executed.
  • the touch panel 4071 can be implemented in multiple types such as resistive, capacitive, infrared, and surface acoustic wave.
  • the user input unit 407 may also include other input devices 4072.
  • other input devices 4072 may include, but are not limited to, a physical keyboard, function keys (such as volume control buttons, switch buttons, etc.), trackball, mouse, and joystick, which will not be repeated here.
  • the touch panel 4071 can cover the display panel 4061.
  • the touch panel 4071 detects a touch operation on or near it, it transmits it to the processor 410 to determine the type of the touch event.
  • the type of event provides corresponding visual output on the display panel 4061.
  • the touch panel 4071 and the display panel 4061 are used as two independent components to realize the input and output functions of the terminal, in some embodiments, the touch panel 4071 and the display panel 4061 can be integrated. Realize the input and output functions of the terminal, which are not limited here.
  • the interface unit 408 is an interface for connecting an external device with the terminal 400.
  • the external device may include a wired or wireless headset port, an external power source (or battery charger) port, a wired or wireless data port, a memory card port, a port for connecting a device with an identification module, audio input/output (I/O) port, video I/O port, headphone port, etc.
  • the interface unit 408 may be used to receive input (for example, data information, power, etc.) from an external device and transmit the received input to one or more elements in the terminal 400 or may be used to communicate between the terminal 400 and the external device. Transfer data between.
  • the memory 409 can be used to store software programs and various data.
  • the memory 409 may mainly include a storage program area and a storage data area.
  • the storage program area may store an operating system, an application program required by at least one function (such as a sound playback function, an image playback function, etc.), etc.; Data (such as audio data, phone book, etc.) created by the use of mobile phones.
  • the memory 409 may include a high-speed random access memory, and may also include a non-volatile memory, such as at least one magnetic disk storage device, a flash memory device, or other volatile solid-state storage devices.
  • the processor 410 is the control center of the terminal. It uses various interfaces and lines to connect various parts of the entire terminal. It executes by running or executing software programs and/or modules stored in the memory 409, and calling data stored in the memory 409. Various functions of the terminal and processing data, so as to monitor the terminal as a whole.
  • the processor 410 may include one or more processing units; optionally, the processor 410 may integrate an application processor and a modem processor, where the application processor mainly processes the operating system, user interface, and application programs, etc.
  • the adjustment processor mainly deals with wireless communication. It can be understood that the foregoing modem processor may not be integrated into the processor 410.
  • the terminal 400 may also include a power source 411 (such as a battery) for supplying power to various components.
  • a power source 411 such as a battery
  • the power source 411 may be logically connected to the processor 410 through a power management system, so as to manage charging, discharging, and power consumption management through the power management system. And other functions.
  • the terminal 400 includes some functional modules not shown, which will not be repeated here.
  • an embodiment of the present disclosure further provides a terminal, including a processor 410, a memory 409, and a computer program stored on the memory 409 and running on the processor 410.
  • a terminal including a processor 410, a memory 409, and a computer program stored on the memory 409 and running on the processor 410.
  • the computer program is executed by the processor 410,
  • Each process of the foregoing embodiment of the random access message sending method for the unlicensed frequency band is realized, and the same technical effect can be achieved. To avoid repetition, details are not described here.
  • the embodiment of the present disclosure also provides a computer-readable storage medium on which a computer program is stored.
  • the computer program is executed by a processor, the random access of the unlicensed frequency band on the terminal side provided by the embodiment of the present disclosure is realized.
  • the computer-readable storage medium such as read-only memory (Read-Only Memory, ROM), random access memory (Random Access Memory, RAM), magnetic disk or optical disk, etc.
  • the technical solution of the present disclosure essentially or the part that contributes to the related technology can be embodied in the form of a software product, and the computer software product is stored in a storage medium (such as ROM/RAM, magnetic disk, optical disk). ) Includes several instructions to make a terminal (which can be a mobile phone, a computer, a server, an air conditioner, or a base station, etc.) execute the method described in each embodiment of the present disclosure.

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Abstract

本公开实施例提供一种非授权频段的随机接入消息发送方法及终端，包括：物理层对高层选择的N1个第一随机接入信道位置进行LBT，N1个第一随机接入信道位置包括至少一个起始时间点对应的随机接入信道，每一起始时间点包括M个随机接入信道，至少一个起始时间点属于一个随机接入信道关联的周期；在第一起始时间点的L个随机接入信道LBT成功的情况下，物理层在目标随机接入信道发送随机接入消息；其中，N1、M和L均为正整数，M小于或等于N1，且M大于或等于L，第一起始时间点为至少一个起始时间点中的一个起始时间点，目标随机接入信道为L个随机接入信道中的一个随机接入信道。

Description

非授权频段的随机接入消息发送方法和终端
相关申请的交叉引用
本申请主张在2019年8月16日在中国提交的中国专利申请号No.201910760103.0的优先权，其全部内容通过引用包含于此。
技术领域
本公开涉及通信技术领域，尤其涉及一种非授权频段的随机接入消息发送方法和终端。
背景技术
在新空口(New Radio，NR)的非授权频段上，对于随机接入消息的发送通常需要进行先听后说(listen before talk，LBT)，在LBT成功时，才会进行随机接入消息的发送。例如，终端或网络设备需要做信道空闲估计(Clear Channel Assess，CCA)或扩展信道空闲估计(extended Clear Channel Assess，eCCA)来侦听信道，即进行能量检测(Energy Detection，ED)，当能量低于一定门限时，信道被判断为空，方可开始传输随机接入消息。
然而相关技术中，通常进行初始接入的终端选定同步信号块(Synchronization Signal and PBCH block，SSB)后，在该SSB对应的连续随机接入信道位置(Random Access Channel occasion，RACH occasion)上以等概率随机选择一个RACH occasion进行随机接入，若在该RACH occasion上LBT失败而不能发送随机接入消息，则需要到下一个RACH关联的周期进行随机接入消息的发送。这样将会导致随机接入的时延较大。
发明内容
本公开实施例提供一种非授权频段的随机接入消息发送方法和终端，以解决随机接入的时延较大的问题。
第一方面，本公开实施例提供一种非授权频段的随机接入消息发送方法，应用于终端，包括：
物理层对高层选择的N1个第一随机接入信道位置进行先听后说LBT，所述N1个第一随机接入信道位置包括至少一个起始时间点对应的随机接入信道，且每一起始时间点包括M个随机接入信道，所述至少一个起始时间点属于一个随机接入信道关联的周期；
在第一起始时间点的L个随机接入信道LBT成功的情况下，所述物理层在目标随机接入信道发送随机接入消息；
其中，N1、M和L均为正整数，M小于或等于N1，且M大于或等于L，所述第一起始时间点为所述至少一个起始时间点中的一个起始时间点，所述目标随机接入信道为所述L个随机接入信道中的一个随机接入信道。
第二方面，本公开实施例还提供一种终端，包括：
处理模块，用于物理层对高层选择的N1个第一随机接入信道位置进行先听后说LBT，所述N1个第一随机接入信道位置包括至少一个起始时间点对应的随机接入信道，且每一起始时间点包括M个随机接入信道，所述至少一个起始时间点属于一个随机接入信道关联的周期；
第一发送模块，用于在第一起始时间点的L个随机接入信道LBT成功的情况下，所述物理层在目标随机接入信道发送随机接入消息；
其中，N1、M和L均为正整数，M小于或等于N1，且M大于或等于L，所述第一起始时间点为所述至少一个起始时间点中的一个起始时间点，所述目标随机接入信道为所述L个随机接入信道中的一个随机接入信道。
第三方面，本公开实施例还提供一种终端，包括：存储器、处理器及存储在所述存储器上并可在所述处理器上运行的程序，所述程序被所述处理器执行时实现上述非授权频段的随机接入消息发送方法中的步骤。
第四方面，本公开实施例还提供一种计算机可读存储介质，所述计算机可读存储介质上存储有计算机程序，所述计算机程序被处理器执行时实现上述非授权频段的随机接入消息发送方法的步骤。
本公开实施例通过物理层在一个随机接入信道关联的周期内可以对高层选择的多个第一随机接入信道位置进行LBT，并在其中一个随机接入信道位置LBT成功的情况下，可以发送随机接入消息。这样，在一个随机接入信道关联的周期可以尝试在多个随机接入信道位置发送随机接入消息，从而提高 了随机接入消息发送的成功率，减小了随机接入的时延。
附图说明
图1是本公开实施例可应用的一种网络系统的结构图；
图2是本公开实施例提供的一种非授权频段的随机接入消息发送方法的流程图；
图3是本公开实施例提供的一种终端的结构图；
图4是本公开实施例提供的另一种终端的结构图。
具体实施方式
下面将结合本公开实施例中的附图，对本公开实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例是本公开一部分实施例，而不是全部的实施例。基于本公开中的实施例，本领域普通技术人员在没有作出创造性劳动前提下所获得的所有其他实施例，都属于本公开保护的范围。
本申请的说明书和权利要求书中的术语“包括”以及它的任何变形，意图在于覆盖不排他的包含，例如，包含了一系列步骤或单元的过程、方法、系统、产品或设备不必限于清楚地列出的那些步骤或单元，而是可包括没有清楚地列出的或对于这些过程、方法、产品或设备固有的其它步骤或单元。此外，说明书以及权利要求中使用“和/或”表示所连接对象的至少其中之一，例如A和/或B，表示包含单独A，单独B，以及A和B都存在三种情况。
在本公开实施例中，“示例性的”或者“例如”等词用于表示作例子、例证或说明。本公开实施例中被描述为“示例性的”或者“例如”的任何实施例或设计方案不应被解释为比其它实施例或设计方案更优选或更具优势。确切而言，使用“示例性的”或者“例如”等词旨在以具体方式呈现相关概念。
下面结合附图介绍本公开的实施例。本公开实施例提供的一种非授权频段的随机接入消息发送方法和终端可以应用于无线通信系统中。该无线通信系统可以为采用5G系统，或者演进型长期演进(Evolved Long Term Evolution，eLTE)系统，或者后续演进通信系统。
请参见图1，图1是本公开实施例可应用的一种网络系统的结构图，如图1所示，包括终端11和网络设备12，其中，终端11可以是用户终端或者其他终端侧设备，例如：手机、平板电脑(Tablet Personal Computer)、膝上型电脑(Laptop Computer)、个人数字助理(personal digital assistant，PDA)、移动上网装置(Mobile Internet Device，MID)或可穿戴式设备(Wearable Device)等终端侧设备，需要说明的是，在本公开实施例中并不限定终端11的具体类型。上述网络设备12可以是5G基站，或者以后版本的基站，或者其他通信系统中的基站，或者称之为节点B，演进节点B，或者发送接收点(Transmission Reception Point，TRP)，或者接入点(Access Point，AP)，或者所述领域中其他词汇，只要达到相同的技术效果，所述网络设备不限于特定技术词汇。另外，上述网络设备12可以是主节点(Master Node，MN)，或者辅节点(Secondary Node，SN)。需要说明的是，在本公开实施例中仅以5G基站为例，但是并不限定网络设备的具体类型。
请参见图2，图2是本公开实施例提供的一种非授权频段的随机接入消息发送方法的流程图，该方法应用于终端，如图2所示，包括以下步骤：
步骤201，物理层对高层选择的N1个第一随机接入信道位置进行先听后说LBT，所述N1个第一随机接入信道位置包括至少一个起始时间点对应的随机接入信道，且每一起始时间点包括M个随机接入信道，所述至少一个起始时间点属于一个随机接入信道关联的周期；
步骤202，在第一起始时间点的L个随机接入信道LBT成功的情况下，所述物理层在目标随机接入信道发送随机接入消息；
其中，N1、M和L均为正整数，M小于或等于N1，且M大于或等于L，所述第一起始时间点为所述至少一个起始时间点中的一个起始时间点，所述目标随机接入信道为所述L个随机接入信道中的一个随机接入信道。
本公开实施例中，随机接入资源和SSB的映射关系通过高层参数ssb-perRACH-OccasionAndCB-PreamblesPerSSB进行配置得到一个资源位置(Resource occasion，RO)关联的SSB个数N和每个SSB在每个RO上有效的PRACH前导码个数。(需要说明的是，该资源位置也可以理解为随机接入信道位置)本实施例中，上述N1个第一随机接入信道位置为高层从连续的候选 随机接入信道位置中选择的RACH occasion。该候选随机接入信道位置可以为一个或者多个SSB关联的RACH occasion。具体的，候选随机接入信道位置如以下表一所示。
RO#3 RO#7 RO#11 RO#15
RO#2 RO#6 RO#10 RO#14
RO#1 RO#5 RO#9 RO#13
RO#0 RO#4 RO#8 RO#12
表一
其中，RO#0～RO#15分别表示候选随机接入信道位置中编号为0～15的资源位置。表一中每一列表示一个起始时间点，RO#0～RO#7与编号为0的SSB(SSB#0)关联，RO#8～RO#15与编号为1的SSB(SSB#1)关联，每一行中各资源位置对应的频率资源范围是相同的。
在本公开实施例中，高层选择的N1个第一随机接入信道位置可以包括一个或者多个起始时间点的随机接入信道位置。在每一个起始时间点内可以选择一个或者多个随机接入信道位置。物理层对N1个第一随机接入信道位置进行LBT时，可以按照起始时间点依次对各第一随机接入信道位置进行LBT。
当物理层在至少一个起始时间点中的一个起始时间点(即上述第一起始时间点)的一个或者多个随机接入信道LBT成功的情况下，可以等概率选择一个随机接入信道发送随机接入消息。
本公开实施例通过物理层在一个随机接入信道关联的周期内可以对高层选择的多个第一随机接入信道位置进行LBT，并在其中一个随机接入信道位置LBT成功的情况下，可以发送随机接入消息。这样，在一个随机接入信道关联的周期可以尝试在多个随机接入信道位置发送随机接入消息，从而提高了随机接入消息发送的成功率，减小了随机接入的时延。
需要说明的是，上述N1个第一随机接入信道位置可以包括一个或者多个起始时间点的随机接入信道位置，以下通过不同的实施例对N1个第一随机接入信道位置包括1个起始时间点的随机接入信道位置以及包括至少两个起始时间点的随机接入信道位置的情况进行详细说明。
方案1：若N1个第一随机接入信道位置包括至少两个起始时间点的随机 接入信道位置，上述物理层对高层选择的N1个第一随机接入信道位置进行先听后说LBT包括：
所述高层在候选随机接入信道位置选择至少两个起始时间点对应的随机接入信道，得到所述N1个第一随机接入信道；
所述物理层按照起始时间点依次对所述N1个第一随机接入信道进行LBT。
应理解，选择N个第一随机接入信道的方式可以根据实际需要进行设置，例如，在一实施例中，所述高层在候选随机接入信道位置选择至少两个起始时间点对应的随机接入信道，得到所述N1个第一随机接入信道包括：
将连续的候选随机接入信道位置按照时间和/或频率分成Q组随机接入信道位置，Q为大于或等于N1的整数；
在所述Q组随机接入信道位置随机选取N1组随机接入信道位置；
在所述N1组随机接入信道位置中的每一组随机接入信道位置随机选取1个随机接入信道位置，得到所述N1个第一随机接入信道位置。
本实施例中，当Q大于N1的情况下，在所述Q组随机接入信道位置可以等概率选择N1组随机接入信道位置。当Q等于N1的情况下，直接将划分的Q组随机接入信道位置确定为N1组随机接入信道位置。
在另一实施例中，所述高层在候选随机接入信道位置选择至少两个起始时间点对应的随机接入信道，得到所述N1个第一随机接入信道包括：
在连续的候选随机接入信道位置对应的起始时间点中，随机选择一个第三起始时间点；
在所述第三起始时间点以及所述第三起始时间点之后的所有起始时间点中，每一个起始时间点选择K个随机接入信道位置，得到所述N1个第一随机接入信道位置，K为小于N1的正整数。
本实施例中，如表一所示，当K＝1，且第三起始时间点为第二列对应的起始时间点，此时可以从第二列、第三列和第四列中各选择一个RO得到N1个第一随机接入信道位置，如RO#4、RO#10和RO#15。
K大于1时，所述K个随机接入信道位置位于不同的频率资源范围上。该频率资源范围可以根据实际需要进行设置，例如，在本实施例中，参照上述表一，第一行和第二行对应为一个频率资源范围，第三行和第四行对应为 一个频率资源范围。当K＝2，且第三起始时间点为第二列对应的起始时间点，此时可以从第二列、第三列和第四列中各选择两个RO得到N1个第一随机接入信道位置，如RO#4、RO#6、RO#8、RO#11、RO#13和RO#15。
进一步的，在高层选择了上述N个第一随机接入信道后，高层还可以执行以下行为：
所述高层确定所述N1个第一随机接入信道的相关信息；
所述高层将所述相关信息发送至所述物理层；
其中，所述相关信息包括随机接入前导码索引(PREAMBLE_INDEX)、随机接入前导码目标接收功率(PREAMBLE_RECEIVED_TARGET_POWER)和随机接入无线网络临时标识(Random Access Radio Network Tempory Identity RA-RNTI)。
可选的，所述N1个第一随机接入信道的随机接入前导码索引和随机接入前导码目标接收功率相同；
或者，所述N1个第一随机接入信道包括按照预设规则划分为至少两组第一随机接入信道，同一组内的第一随机接入信道的随机接入前导码索引和随机接入前导码目标接收功率相同。
本实施例中，终端高层选择的N1个RACH occasion共享同一个选择的随机接入前导码索引和计算得到的随机接入前导码目标接收功率，或者分成至少两组(例如根据映射的SSB不同)并在每组组内共享同一个选择的随机接入前导码索引和计算得到的随机接入前导码目标接收功率，同时分别计算得到的N1个RA-RNTI，将上述相关信息发送给物理层。
终端的物理层对N1个RACH occasion进行LBT时，首先将高层选择的N1个RACH occasion按照起始时间点不同分成T组，按照起始时间点对T组RACH occasion依次进行LBT。
进一步的，为了降低资源占用率，降低终端的电量损耗，在本实施例中，所述物理层在目标随机接入信道发送随机接入消息之后，所述方法还包括：
所述物理层取消第二起始时间点的第一随机接入信道上随机接入消息的发送，所述第二起始时间点为所述第一起始时间点之后的起始时间点。
本实施例中，取消第二起始时间点的RACH occasion上随机接入消息的 发送包括可以取消在第二起始时间点的RACH occasion进行LBT，也可以是在在第二起始时间点的RACH occasion LBT成功，但是不发送随机接入消息。
具体的，当在某一起始时间点(上述第一起始时间点)的至少一个RACH occasion LBT成功时，则在LBT成功RACH occasion中的随机选择一个RACH occasion进行RACH message1的发送，并取消后续起始时间点RACH occasion上随机接入消息的发送，以选择的该RACH occasion对应的RA-RNTI进行后续进程；否则继续下一个时间点的RACH occasion的尝试。
进一步的，当选择的N1个第一RACH occasion中的最后一个起始时间点的RACH occasion LBT仍然失败时，可以结束本次随机接入信道对应的周期的随机接入消息的发送。具体的，所述物理层在目标随机接入信道发送随机接入消息之后，所述方法还包括：
在所述N1个第一随机接入信道位置LBT失败的情况下，所述物理层向所述高层发送第一通知消息，所述第一通知消息用于通知本次物理随机接入由于LBT不成功发送失败；
所述高层根据所述第一通知消息，控制用于统计随机接入信道LBT失败次数的第一计数器加N1，所述第一计数器记录的次数用于触发随机接入信道LBT失败恢复流程。
方案2：若所述N1个第一随机接入信道位置为一个起始时间点对应的随机接入信道，所述物理层在目标随机接入信道发送随机接入消息之后，所述方法还包括：
所述物理层向所述高层发送第二通知消息，所述第二通知消息用于通知所N1个第一随机接入信道发送失败；
若候选随机接入信道在第四起始时间点之后还存在可用的随机接入信道的情况下，所述高层根据所述第二通知消息在所述可用的随机接入信道随机选择N2个第一随机接入信道；
所述高层将所述N2个第一随机接入信道的相关信息发送至所述物理层，以供所述物理层对所述N2个第一随机接入信道进行LBT；
其中，所述第四起始时间点为所述N1个第一随机接入信道位置的起始时间点，N2为正整数。
本实施例中，上述N1可以为1，也可以为大于1的整数。具体的，当N1为1时，如上述表一所示，高层可以首先等概率选择一个起始时间点(即上述第四起始时间点，如RO#0对应的起始时间点)，在该起始时间点等概率选择一个第一随机接入信道位置(如RO#5)。然后高层确定该RO#5对应的相关信息，并将该相关信息发送到物理层。物理层对选择的第一随机接入信道进行LBT，若该第一随机接入信道LBT失败，则物理层向高层发送第二通知消息，高层基于该第二通知消息将会继续在第四起始时间点之后选择一个起始时间点的随机接入信道位置继续尝试发送随机接入消息。应理解，再次选择的随机接入信道位置可以是等概率选择的，也可以是最近可用的起始时间点的随机接入信道位置。换句话说，上述N2个第一随机接入信道位置为所述候选随机接入信道中，位于所述第四起始时间点之后、且最近可用的随机接入信道位置。当然在其他实施例中，还可以以SSB为单位每一次从一个SSB关联的机接入信道位置选择N1个第一随机接入信道位置。
需要说明的是，若上述N1为大于1的整数，则可以设置选择的随机接入信道位置位于不同的频率资源范围，如表一所示，第一行和第二行对应为一个频率资源范围，第三行和第四行对应为一个频率资源范围。当N1为2，每次可以从第一行和第二行选择一个随机接入信道位置，从第三行和第四行选择一个随机接入信道位置。
进一步的，所述物理层向所述高层发送第二通知消息之后，所述方法还包括：
所述高层根据所述第二通知消息，控制用于统计随机接入信道LBT失败次数的第二计数器加N1，所述计数器记录的次数用于触发随机接入信道LBT失败恢复流程。
应理解，确定上述候选随机接入信道的方式可以根据实际需要进行设置，例如，在一实施例中，所述候选随机接入信道为满足预设条件的至少一个同步信号块SSB对应的随机接入信道。
例如，终端可以在接收功率大于预设门限值的多个SSB中选择一个或者多个SSB对应的随机接入信道作为候选随机接入信道。由于在多个SSB上尝试进行随机接入消息的发送，从而可以提高随机接入消息发送的成功率，进 而减小了随机接入的时延。
需要说明的是，对于2步随机接入信道的情况，高层选择了RACH occasion的同时，还相当于选择了RACH occasion关联的物理上行共享信道位置(Physical Uplink Shared Channel occasion，PUSCH occasion)。也就是说高层除了将RACH occasion的相关信息发送给物理层，还将RACH occasion关联的PUSCH occasion的相关信息发送给物理层。
为了更好的理解本公开，基于上述表一，以下针对上述方案1和方案2的具体实现过程进行详细说明。
对于上述方案1，终端高层选择SSB#0进行初始接入，则它对应的RO分布在两个时间单元，则将这些RO按照时间分为两组，即(RO#0，RO#1，RO#2，RO#3)和(RO#4，RO#5，RO#6，RO#7)，在每组中随机选取一个RO，例如RO#2和RO#6并把相关信息发给物理层。物理层在RO#2上尝试发送失败，则继续在RO#6上进行LBT成功，则发送RACH消息。
对于上述方案2，终端高层选择SSB#0和SSB#1对应的ROs进行初始接入，首先随机选取一个RO进行尝试，例如RO#6。用户物理层在RO#6上进行尝试失败并通知高层，高层在后面的RO随机选择RO#15进行尝试发送失败，此时物理层通知高层本次RACH发送失败。
请参见图3，图3是本公开实施例提供的一种终端的结构图，如图3所示，终端300包括：
处理模块301，用于物理层对高层选择的N1个第一随机接入信道位置进行先听后说LBT，所述N1个第一随机接入信道位置包括至少一个起始时间点对应的随机接入信道，且每一起始时间点包括M个随机接入信道，所述至少一个起始时间点属于一个随机接入信道关联的周期；
第一发送模块302，用于在第一起始时间点的L个随机接入信道LBT成功的情况下，所述物理层在目标随机接入信道发送随机接入消息；
其中，N1、M和L均为正整数，M小于或等于N1，且M大于或等于L，所述第一起始时间点为所述至少一个起始时间点中的一个起始时间点，所述目标随机接入信道为所述L个随机接入信道中的一个随机接入信道。
可选的，处理模块301包括：
选择单元，用于所述高层在候选随机接入信道位置选择至少两个起始时 间点对应的随机接入信道，得到所述N1个第一随机接入信道；
监听单元，用于所述物理层按照起始时间点依次对所述N1个第一随机接入信道进行LBT。
可选的，所述终端还包括：
第一控制模块，用于所述物理层取消第二起始时间点的第一随机接入信道上随机接入消息的发送，所述第二起始时间点为所述第一起始时间点之后的起始时间点。
可选的，所述第一发送模块302还用于在所述N1个第一随机接入信道位置LBT失败的情况下，所述物理层向所述高层发送第一通知消息，所述第一通知消息用于通知本次物理随机接入由于LBT不成功发送失败；
第二控制模块，用于所述高层根据所述第一通知消息，控制用于统计随机接入信道LBT失败次数的第一计数器加N1，所述第一计数器记录的次数用于触发随机接入信道LBT失败恢复流程。
可选的，所述选择单元具体用于：将连续的候选随机接入信道位置按照时间和/或频率分成Q组随机接入信道位置，Q为大于或等于N1的整数；在所述Q组随机接入信道位置随机选取N1组随机接入信道位置；在所述N1组随机接入信道位置中的每一组随机接入信道位置随机选取1个随机接入信道位置，得到所述N1个第一随机接入信道位置。
可选的，所述选择单元具体用于：在连续的候选随机接入信道位置对应的起始时间点中，随机选择一个第三起始时间点；在所述第三起始时间点以及所述第三起始时间点之后的所有起始时间点中，每一个起始时间点选择K个随机接入信道位置，得到所述N1个第一随机接入信道位置，K为小于N1的正整数。
可选的，当K大于1时，所述K个随机接入信道位置位于不同的频率资源范围上。
可选的，所述终端还包括：
确定模块，用于所述高层确定所述N1个第一随机接入信道的相关信息；
第三发送模块，用于所述高层将所述相关信息发送至所述物理层；
其中，所述相关信息包括随机接入前导码索引、随机接入前导码目标接 收功率和随机接入无线网络临时标识。
可选的，所述N1个第一随机接入信道的随机接入前导码索引和随机接入前导码目标接收功率相同；
或者，所述N1个第一随机接入信道包括按照预设规则划分为至少两组第一随机接入信道，同一组内的第一随机接入信道的随机接入前导码索引和随机接入前导码目标接收功率相同。
可选的，当所述N1个第一随机接入信道位置为一个起始时间点对应的随机接入信道时，所述终端还包括：
第二发送模块，用于所述物理层向所述高层发送第二通知消息，所述第二通知消息用于通知所N1个第一随机接入信道发送失败；
选择模块，用于若候选随机接入信道在第四起始时间点之后还存在可用的随机接入信道的情况下，所述高层根据所述第二通知消息在所述可用的随机接入信道随机选择N2个第一随机接入信道；
第三发送模块，用于所述高层将所述N2个第一随机接入信道的相关信息发送至所述物理层，以供所述物理层对所述N2个第一随机接入信道进行LBT；
其中，所述第四起始时间点为所述N1个第一随机接入信道位置的起始时间点，N2为正整数。
可选的，所述N2个第一随机接入信道位置为所述候选随机接入信道中，位于所述第四起始时间点之后、且最近可用的随机接入信道位置。
可选的，所述终端还包括：
第二控制模块，用于所述高层根据所述第二通知消息，控制用于统计随机接入信道LBT失败次数的第二计数器加N1，所述计数器记录的次数用于触发随机接入信道LBT失败恢复流程。
可选的，所述候选随机接入信道为满足预设条件的至少一个同步信号块SSB对应的随机接入信道。
本公开实施例提供的终端能够实现图2的方法实施例中终端实现的各个过程，为避免重复，这里不再赘述。
图4为实现本公开各个实施例的一种终端的硬件结构示意图。
该终端400包括但不限于：射频单元401、网络模块402、音频输出单元 403、输入单元404、传感器405、显示单元406、用户输入单元407、接口单元408、存储器409、处理器410、以及电源411等部件。本领域技术人员可以理解，图4中示出的终端结构并不构成对终端的限定，终端可以包括比图示更多或更少的部件，或者组合某些部件，或者不同的部件布置。在本公开实施例中，终端包括但不限于手机、平板电脑、笔记本电脑、掌上电脑、车载终端、可穿戴设备、以及计步器等。
处理器410用于：物理层对高层选择的N1个第一随机接入信道位置进行先听后说LBT，所述N1个第一随机接入信道位置包括至少一个起始时间点对应的随机接入信道，且每一起始时间点包括M个随机接入信道，所述至少一个起始时间点属于一个随机接入信道关联的周期；
射频单元401用于，在第一起始时间点的L个随机接入信道LBT成功的情况下，所述物理层在目标随机接入信道发送随机接入消息；
其中，N1、M和L均为正整数，M小于或等于N1，且M大于或等于L，所述第一起始时间点为所述至少一个起始时间点中的一个起始时间点，所述目标随机接入信道为所述L个随机接入信道中的一个随机接入信道。
应理解，本实施例中，上述处理器410和射频单元401能够实现图2的方法实施例中终端实现的各个过程，为避免重复，这里不再赘述。
应理解的是，本公开实施例中，射频单元401可用于收发信息或通话过程中，信号的接收和发送，具体的，将来自基站的下行数据接收后，给处理器410处理；另外，将上行的数据发送给基站。通常，射频单元401包括但不限于天线、至少一个放大器、收发信机、耦合器、低噪声放大器、双工器等。此外，射频单元401还可以通过无线通信系统与网络和其他设备通信。
终端通过网络模块402为用户提供了无线的宽带互联网访问，如帮助用户收发电子邮件、浏览网页和访问流式媒体等。
音频输出单元403可以将射频单元401或网络模块402接收的或者在存储器409中存储的音频数据转换成音频信号并且输出为声音。而且，音频输出单元403还可以提供与终端400执行的特定功能相关的音频输出(例如，呼叫信号接收声音、消息接收声音等等)。音频输出单元403包括扬声器、蜂鸣器以及受话器等。
输入单元404用于接收音频或视频信号。输入单元404可以包括图形处理器(Graphics Processing Unit，GPU)4041和麦克风4042，图形处理器4041对在视频捕获模式或图像捕获模式中由图像捕获装置(如摄像头)获得的静态图片或视频的图像数据进行处理。处理后的图像帧可以显示在显示单元406上。经图形处理器4041处理后的图像帧可以存储在存储器409(或其它存储介质)中或者经由射频单元401或网络模块402进行发送。麦克风4042可以接收声音，并且能够将这样的声音处理为音频数据。处理后的音频数据可以在电话通话模式的情况下转换为可经由射频单元401发送到移动通信基站的格式输出。
终端400还包括至少一种传感器405，比如光传感器、运动传感器以及其他传感器。具体地，光传感器包括环境光传感器及接近传感器，其中，环境光传感器可根据环境光线的明暗来调节显示面板4061的亮度，接近传感器可在终端400移动到耳边时，关闭显示面板4061和/或背光。作为运动传感器的一种，加速计传感器可检测各个方向上(一般为三轴)加速度的大小，静止时可检测出重力的大小及方向，可用于识别终端姿态(比如横竖屏切换、相关游戏、磁力计姿态校准)、振动识别相关功能(比如计步器、敲击)等；传感器405还可以包括指纹传感器、压力传感器、虹膜传感器、分子传感器、陀螺仪、气压计、湿度计、温度计、红外线传感器等，在此不再赘述。
显示单元406用于显示由用户输入的信息或提供给用户的信息。显示单元406可包括显示面板4061，可以采用液晶显示器(Liquid Crystal Display，LCD)、有机发光二极管(Organic Light-Emitting Diode,OLED)等形式来配置显示面板4061。
用户输入单元407可用于接收输入的数字或字符信息，以及产生与终端的用户设置以及功能控制有关的键信号输入。具体地，用户输入单元407包括触控面板4071以及其他输入设备4072。触控面板4071，也称为触摸屏，可收集用户在其上或附近的触摸操作(比如用户使用手指、触笔等任何适合的物体或附件在触控面板4071上或在触控面板4071附近的操作)。触控面板4071可包括触摸检测装置和触摸控制器两个部分。其中，触摸检测装置检测用户的触摸方位，并检测触摸操作带来的信号，将信号传送给触摸控制器； 触摸控制器从触摸检测装置上接收触摸信息，并将它转换成触点坐标，再送给处理器410，接收处理器410发来的命令并加以执行。此外，可以采用电阻式、电容式、红外线以及表面声波等多种类型实现触控面板4071。除了触控面板4071，用户输入单元407还可以包括其他输入设备4072。具体地，其他输入设备4072可以包括但不限于物理键盘、功能键(比如音量控制按键、开关按键等)、轨迹球、鼠标、操作杆，在此不再赘述。
进一步的，触控面板4071可覆盖在显示面板4061上，当触控面板4071检测到在其上或附近的触摸操作后，传送给处理器410以确定触摸事件的类型，随后处理器410根据触摸事件的类型在显示面板4061上提供相应的视觉输出。虽然在图4中，触控面板4071与显示面板4061是作为两个独立的部件来实现终端的输入和输出功能，但是在某些实施例中，可以将触控面板4071与显示面板4061集成而实现终端的输入和输出功能，具体此处不做限定。
接口单元408为外部装置与终端400连接的接口。例如，外部装置可以包括有线或无线头戴式耳机端口、外部电源(或电池充电器)端口、有线或无线数据端口、存储卡端口、用于连接具有识别模块的装置的端口、音频输入/输出(I/O)端口、视频I/O端口、耳机端口等等。接口单元408可以用于接收来自外部装置的输入(例如，数据信息、电力等等)并且将接收到的输入传输到终端400内的一个或多个元件或者可以用于在终端400和外部装置之间传输数据。
存储器409可用于存储软件程序以及各种数据。存储器409可主要包括存储程序区和存储数据区，其中，存储程序区可存储操作系统、至少一个功能所需的应用程序(比如声音播放功能、图像播放功能等)等；存储数据区可存储根据手机的使用所创建的数据(比如音频数据、电话本等)等。此外，存储器409可以包括高速随机存取存储器，还可以包括非易失性存储器，例如至少一个磁盘存储器件、闪存器件、或其他易失性固态存储器件。
处理器410是终端的控制中心，利用各种接口和线路连接整个终端的各个部分，通过运行或执行存储在存储器409内的软件程序和/或模块，以及调用存储在存储器409内的数据，执行终端的各种功能和处理数据，从而对终端进行整体监控。处理器410可包括一个或多个处理单元；可选的，处理器 410可集成应用处理器和调制解调处理器，其中，应用处理器主要处理操作系统、用户界面和应用程序等，调制解调处理器主要处理无线通信。可以理解的是，上述调制解调处理器也可以不集成到处理器410中。
终端400还可以包括给各个部件供电的电源411(比如电池)，可选的，电源411可以通过电源管理系统与处理器410逻辑相连，从而通过电源管理系统实现管理充电、放电、以及功耗管理等功能。
另外，终端400包括一些未示出的功能模块，在此不再赘述。
可选的，本公开实施例还提供一种终端，包括处理器410，存储器409，存储在存储器409上并可在所述处理器410上运行的计算机程序，该计算机程序被处理器410执行时实现上述非授权频段的随机接入消息发送方法实施例的各个过程，且能达到相同的技术效果，为避免重复，这里不再赘述。
本公开实施例还提供一种计算机可读存储介质，计算机可读存储介质上存储有计算机程序，该该计算机程序被处理器执行时实现本公开实施例提供的终端侧的非授权频段的随机接入消息发送方法实施例的各个过程，且能达到相同的技术效果，为避免重复，这里不再赘述。其中，所述的计算机可读存储介质，如只读存储器(Read-Only Memory，ROM)、随机存取存储器(Random Access Memory，RAM)、磁碟或者光盘等。
需要说明的是，在本文中，术语“包括”、“包含”或者其任何其他变体意在涵盖非排他性的包含，从而使得包括一系列要素的过程、方法、物品或者装置不仅包括那些要素，而且还包括没有明确列出的其他要素，或者是还包括为这种过程、方法、物品或者装置所固有的要素。在没有更多限制的情况下，由语句“包括一个……”限定的要素，并不排除在包括该要素的过程、方法、物品或者装置中还存在另外的相同要素。
通过以上的实施方式的描述，本领域的技术人员可以清楚地了解到上述实施例方法可借助软件加必需的通用硬件平台的方式来实现，当然也可以通过硬件，但很多情况下前者是更佳的实施方式。基于这样的理解，本公开的技术方案本质上或者说对相关技术做出贡献的部分可以以软件产品的形式体现出来，该计算机软件产品存储在一个存储介质(如ROM/RAM、磁碟、光盘)中，包括若干指令用以使得一台终端(可以是手机，计算机，服务器，空调 器，或者基站等)执行本公开各个实施例所述的方法。
上面结合附图对本公开的实施例进行了描述，但是本公开并不局限于上述的具体实施方式，上述的具体实施方式仅仅是示意性的，而不是限制性的，本领域的普通技术人员在本公开的启示下，在不脱离本公开宗旨和权利要求所保护的范围情况下，还可做出很多形式，均属于本公开的保护之内。

Claims (20)

  1. 一种非授权频段的随机接入消息发送方法，应用于终端，包括：
    物理层对高层选择的N1个第一随机接入信道位置进行先听后说LBT，所述N1个第一随机接入信道位置包括至少一个起始时间点对应的随机接入信道，且每一起始时间点包括M个随机接入信道，所述至少一个起始时间点属于一个随机接入信道关联的周期；
    在第一起始时间点的L个随机接入信道LBT成功的情况下，所述物理层在目标随机接入信道发送随机接入消息；
    其中，N1、M和L均为正整数，M小于或等于N1，且M大于或等于L，所述第一起始时间点为所述至少一个起始时间点中的一个起始时间点，所述目标随机接入信道为所述L个随机接入信道中的一个随机接入信道。
  2. 根据权利要求1所述的方法，其中，所述物理层对高层选择的N1个第一随机接入信道位置进行先听后说LBT包括：
    所述高层在候选随机接入信道位置选择至少两个起始时间点对应的随机接入信道，得到所述N1个第一随机接入信道；
    所述物理层按照起始时间点依次对所述N1个第一随机接入信道进行LBT。
  3. 根据权利要求2所述的方法，其中，所述物理层在目标随机接入信道发送随机接入消息之后，所述方法还包括：
    所述物理层取消第二起始时间点的第一随机接入信道上随机接入消息的发送，所述第二起始时间点为所述第一起始时间点之后的起始时间点。
  4. 根据权利要求2所述的方法，其中，所述物理层在目标随机接入信道发送随机接入消息之后，所述方法还包括：
    在所述N1个第一随机接入信道位置LBT失败的情况下，所述物理层向所述高层发送第一通知消息，所述第一通知消息用于通知本次物理随机接入由于LBT不成功发送失败；
    所述高层根据所述第一通知消息，控制用于统计随机接入信道LBT失败次数的第一计数器加N1，所述第一计数器记录的次数用于触发随机接入信道 LBT失败恢复流程。
  5. 根据权利要求2所述的方法，其中，所述高层在候选随机接入信道位置选择至少两个起始时间点对应的随机接入信道，得到所述N1个第一随机接入信道包括：
    将连续的候选随机接入信道位置按照时间和/或频率分成Q组随机接入信道位置，Q为大于或等于N1的整数；
    在所述Q组随机接入信道位置随机选取N1组随机接入信道位置；
    在所述N1组随机接入信道位置中的每一组随机接入信道位置随机选取1个随机接入信道位置，得到所述N1个第一随机接入信道位置。
  6. 根据权利要求2所述的方法，其中，所述高层在候选随机接入信道位置选择至少两个起始时间点对应的随机接入信道，得到所述N1个第一随机接入信道包括：
    在连续的候选随机接入信道位置对应的起始时间点中，随机选择一个第三起始时间点；
    在所述第三起始时间点以及所述第三起始时间点之后的所有起始时间点中，每一个起始时间点选择K个随机接入信道位置，得到所述N1个第一随机接入信道位置，K为小于N1的正整数。
  7. 根据权利要求6所述的方法，其中，当K大于1时，所述K个随机接入信道位置位于不同的频率资源范围上。
  8. 根据权利要求2所述的方法，其中，所述高层在候选随机接入信道位置选择至少两个起始时间点对应的随机接入信道，得到所述N1个第一随机接入信道之后，所述方法还包括：
    所述高层确定所述N1个第一随机接入信道的相关信息；
    所述高层将所述相关信息发送至所述物理层；
    其中，所述相关信息包括随机接入前导码索引、随机接入前导码目标接收功率和随机接入无线网络临时标识。
  9. 根据权利要求8所述的方法，其中，所述N1个第一随机接入信道的随机接入前导码索引和随机接入前导码目标接收功率相同；
    或者，所述N1个第一随机接入信道包括按照预设规则划分为至少两组 第一随机接入信道，同一组内的第一随机接入信道的随机接入前导码索引和随机接入前导码目标接收功率相同。
  10. 根据权利要求1所述的方法，其中，当所述N1个第一随机接入信道位置为一个起始时间点对应的随机接入信道时，所述物理层在目标随机接入信道发送随机接入消息之后，所述方法还包括：
    所述物理层向所述高层发送第二通知消息，所述第二通知消息用于通知所N1个第一随机接入信道发送失败；
    若候选随机接入信道在第四起始时间点之后还存在可用的随机接入信道的情况下，所述高层根据所述第二通知消息在所述可用的随机接入信道随机选择N2个第一随机接入信道；
    所述高层将所述N2个第一随机接入信道的相关信息发送至所述物理层，以供所述物理层对所述N2个第一随机接入信道进行LBT；
    其中，所述第四起始时间点为所述N1个第一随机接入信道位置的起始时间点，N2为正整数。
  11. 根据权利要求10所述的方法，其中，所述N2个第一随机接入信道位置为所述候选随机接入信道中，位于所述第四起始时间点之后、且最近可用的随机接入信道位置。
  12. 根据权利要求10所述的方法，其中，所述物理层向所述高层发送第二通知消息之后，所述方法还包括：
    所述高层根据所述第二通知消息，控制用于统计随机接入信道LBT失败次数的第二计数器加N1，所述计数器记录的次数用于触发随机接入信道LBT失败恢复流程。
  13. 根据权利要求2至12中任一项所述的方法，其中，所述候选随机接入信道为满足预设条件的至少一个同步信号块SSB对应的随机接入信道。
  14. 一种终端，包括：
    处理模块，用于物理层对高层选择的N1个第一随机接入信道位置进行先听后说LBT，所述N1个第一随机接入信道位置包括至少一个起始时间点对应的随机接入信道，且每一起始时间点包括M个随机接入信道，所述至少一个起始时间点属于一个随机接入信道关联的周期；
    第一发送模块，用于在第一起始时间点的L个随机接入信道LBT成功的情况下，所述物理层在目标随机接入信道发送随机接入消息；
    其中，N1、M和L均为正整数，M小于或等于N1，且M大于或等于L，所述第一起始时间点为所述至少一个起始时间点中的一个起始时间点，所述目标随机接入信道为所述L个随机接入信道中的一个随机接入信道。
  15. 根据权利要求14所述的终端，其中，所述处理模块包括：
    选择单元，用于所述高层在候选随机接入信道位置选择至少两个起始时间点对应的随机接入信道，得到所述N1个第一随机接入信道；
    监听单元，用于所述物理层按照起始时间点依次对所述N1个第一随机接入信道进行LBT。
  16. 根据权利要求15所述的终端，其中，所述选择单元具体用于：将连续的候选随机接入信道位置按照时间和/或频率分成Q组随机接入信道位置，Q为大于或等于N1的整数；在所述Q组随机接入信道位置随机选取N1组随机接入信道位置；在所述N1组随机接入信道位置中的每一组随机接入信道位置随机选取1个随机接入信道位置，得到所述N1个第一随机接入信道位置。
  17. 根据权利要求15所述的终端，其中，所述选择单元具体用于：在连续的候选随机接入信道位置对应的起始时间点中，随机选择一个第三起始时间点；在所述第三起始时间点以及所述第三起始时间点之后的所有起始时间点中，每一个起始时间点选择K个随机接入信道位置，得到所述N1个第一随机接入信道位置，K为小于N1的正整数。
  18. 根据权利要求14所述的终端，其中，当所述N1个第一随机接入信道位置为一个起始时间点对应的随机接入信道时，所述终端还包括：
    第二发送模块，用于所述物理层向所述高层发送第二通知消息，所述第二通知消息用于通知所N1个第一随机接入信道发送失败；
    选择模块，用于若候选随机接入信道在第四起始时间点之后还存在可用的随机接入信道的情况下，所述高层根据所述第二通知消息在所述可用的随机接入信道随机选择N2个第一随机接入信道；
    第三发送模块，用于所述高层将所述N2个第一随机接入信道的相关信 息发送至所述物理层，以供所述物理层对所述N2个第一随机接入信道进行LBT；
    其中，所述第四起始时间点为所述N1个第一随机接入信道位置的起始时间点，N2为正整数。
  19. 一种终端，包括：存储器、处理器及存储在所述存储器上并可在所述处理器上运行的程序，所述程序被所述处理器执行时实现如权利要求1至13中任一项所述的非授权频段的随机接入消息发送方法中的步骤。
  20. 一种计算机可读存储介质，其中，所述计算机可读存储介质上存储有计算机程序，所述计算机程序被处理器执行时实现如权利要求1至13中任一项所述的非授权频段的随机接入消息发送方法的步骤。
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VIVO: "RACH Resource Selection for Msg1 in NR-U", 3GPP DRAFT; R2-1905620 RACH RESOURCE SELECTION FOR MSG1 IN NR-U, vol. RAN WG2, 3 May 2019 (2019-05-03), Reno, USA, pages 1 - 4, XP051709978 *

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