WO2020151743A1 - 随机接入方法及终端 - Google Patents

随机接入方法及终端 Download PDF

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Publication number
WO2020151743A1
WO2020151743A1 PCT/CN2020/073774 CN2020073774W WO2020151743A1 WO 2020151743 A1 WO2020151743 A1 WO 2020151743A1 CN 2020073774 W CN2020073774 W CN 2020073774W WO 2020151743 A1 WO2020151743 A1 WO 2020151743A1
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WIPO (PCT)
Prior art keywords
carrier
random access
type
uplink carrier
measurement information
Prior art date
Application number
PCT/CN2020/073774
Other languages
English (en)
French (fr)
Inventor
莫毅韬
吴昱民
Original Assignee
维沃移动通信有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Publication date
Application filed by 维沃移动通信有限公司 filed Critical 维沃移动通信有限公司
Priority to EP20744483.7A priority Critical patent/EP3917253A4/en
Priority to KR1020217025215A priority patent/KR20210111846A/ko
Publication of WO2020151743A1 publication Critical patent/WO2020151743A1/zh
Priority to US17/382,422 priority patent/US20210352741A1/en

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W74/00—Wireless channel access, e.g. scheduled or random access
    • H04W74/08—Non-scheduled or contention based access, e.g. random access, ALOHA, CSMA [Carrier Sense Multiple Access]
    • H04W74/0833—Non-scheduled or contention based access, e.g. random access, ALOHA, CSMA [Carrier Sense Multiple Access] using a random access procedure
    • H04W74/0841—Non-scheduled or contention based access, e.g. random access, ALOHA, CSMA [Carrier Sense Multiple Access] using a random access procedure with collision treatment
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W74/00—Wireless channel access, e.g. scheduled or random access
    • H04W74/08—Non-scheduled or contention based access, e.g. random access, ALOHA, CSMA [Carrier Sense Multiple Access]
    • H04W74/0833—Non-scheduled or contention based access, e.g. random access, ALOHA, CSMA [Carrier Sense Multiple Access] using a random access procedure
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W74/00—Wireless channel access, e.g. scheduled or random access
    • H04W74/08—Non-scheduled or contention based access, e.g. random access, ALOHA, CSMA [Carrier Sense Multiple Access]
    • H04W74/0866—Non-scheduled or contention based access, e.g. random access, ALOHA, CSMA [Carrier Sense Multiple Access] using a dedicated channel for access
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/50—Allocation or scheduling criteria for wireless resources
    • H04W72/54—Allocation or scheduling criteria for wireless resources based on quality criteria
    • H04W72/542—Allocation or scheduling criteria for wireless resources based on quality criteria using measured or perceived quality
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/0001—Arrangements for dividing the transmission path
    • H04L5/0003—Two-dimensional division
    • H04L5/0005—Time-frequency
    • H04L5/0007—Time-frequency the frequencies being orthogonal, e.g. OFDM(A), DMT
    • H04L5/001—Time-frequency the frequencies being orthogonal, e.g. OFDM(A), DMT the frequencies being arranged in component carriers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0048—Allocation of pilot signals, i.e. of signals known to the receiver
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/02—Selection of wireless resources by user or terminal
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation
    • H04W72/044—Wireless resource allocation based on the type of the allocated resource
    • H04W72/0453—Resources in frequency domain, e.g. a carrier in FDMA
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/50—Allocation or scheduling criteria for wireless resources
    • H04W72/54—Allocation or scheduling criteria for wireless resources based on quality criteria
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W74/00—Wireless channel access, e.g. scheduled or random access
    • H04W74/002—Transmission of channel access control information
    • H04W74/004—Transmission of channel access control information in the uplink, i.e. towards network
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W74/00—Wireless channel access, e.g. scheduled or random access
    • H04W74/08—Non-scheduled or contention based access, e.g. random access, ALOHA, CSMA [Carrier Sense Multiple Access]
    • H04W74/0808—Non-scheduled or contention based access, e.g. random access, ALOHA, CSMA [Carrier Sense Multiple Access] using carrier sensing, e.g. as in CSMA

Definitions

  • the present disclosure relates to the field of communication technology, and in particular to a random access method and terminal.
  • a fifth-generation (5 th Generation, 5G) mobile communication system otherwise known as a new air interface (New Radio, NR) system
  • NR new Radio
  • a carrier that is, a serving cell can be configured with a standard uplink (Normal Uplink, NUL) carrier and a SUL carrier at the same time.
  • NUL Normal Uplink
  • an unlicensed band can be used as a supplement to a licensed band to help operators expand services.
  • the uplink carrier in the licensed frequency band can be used as the SUL carrier and the uplink carrier in the unlicensed frequency band can be used as another uplink carrier.
  • the terminal can perform a random access process through the uplink carrier, such as sending a random access request message through the uplink carrier to initiate random access.
  • a random access process through the uplink carrier, such as sending a random access request message through the uplink carrier to initiate random access.
  • the serving cell is configured with both the SUL carrier and the NUL carrier, if the network equipment does not explicitly indicate which carrier the terminal uses for the random access process.
  • the terminal cannot determine which carrier is used for the random access process due to the uplink carrier on the unlicensed frequency band. If an unreasonable carrier is used, the random access process may fail.
  • the embodiments of the present disclosure provide a random access method and terminal to solve the problem of low success rate of random access process due to the selection of unreasonable carriers for random access in the scenario where there are uplink carriers in unlicensed frequency bands. problem.
  • embodiments of the present disclosure provide a random access method applied to the terminal side, including:
  • the random access request message is sent through the target carrier; the target carrier is one of the first type of uplink carrier and the second type of uplink carrier.
  • the embodiments of the present disclosure also provide a terminal, including:
  • the sending module is used to send the random access request message through the target carrier; the target carrier is one of the first type of uplink carrier and the second type of uplink carrier.
  • inventions of the present disclosure provide a terminal.
  • the terminal includes a processor, a memory, and a computer program stored in the memory and running on the processor.
  • the computer program is executed by the processor to implement the random access method described above. step.
  • the embodiments of the present disclosure provide a computer-readable storage medium on which a computer program is stored, and when the computer program is executed by a processor, the steps of the random access method described above are implemented.
  • the terminal of the embodiment of the present disclosure can select between the first type of uplink carrier and the second type of uplink carrier, which can improve the flexibility of random access resource selection, and can also change the target carrier when random access is not completed. Improve the success rate of random access and reduce the delay of random access.
  • Figure 1 shows a block diagram of a mobile communication system to which the embodiments of the present disclosure can be applied;
  • FIG. 2 shows a schematic flowchart of a random access method according to an embodiment of the present disclosure
  • FIG. 3 shows a schematic flowchart of a random access method in scenario 1 of an embodiment of the present disclosure
  • FIG. 4 shows a schematic flowchart of a random access method in scenario 2 of an embodiment of the present disclosure
  • FIG. 5 shows a schematic diagram 1 of the module structure of a terminal according to an embodiment of the present disclosure
  • FIG. 6 shows the second schematic diagram of the module structure of the terminal according to the embodiment of the present disclosure
  • FIG. 7 shows the third schematic diagram of the module structure of the terminal of the embodiment of the present disclosure.
  • FIG. 8 shows a block diagram of a terminal according to an embodiment of the present disclosure.
  • LTE Long Term Evolution
  • LTE-A Long Term Evolution
  • CDMA Code Division Multiple Access
  • TDMA Time Division Multiple Access
  • FDMA Frequency Division Multiple Access
  • OFDMA Orthogonal Frequency Division Multiple Access
  • SC-FDMA Single Carrier Frequency Division multiple access
  • SC-FDMA Single Carrier Frequency Division multiple access
  • the wireless communication system includes a terminal 11 and a network device 12.
  • the terminal 11 may also be referred to as a terminal device or a user terminal (User Equipment, UE), and the terminal 11 may be a mobile phone, a tablet (Personal Computer), a laptop (Laptop Computer), or a personal digital assistant (Personal Digital Assistant).
  • PDA Mobile Internet Device
  • MID Wearable Device
  • WAUable Device wearable Device
  • in-vehicle device other terminal side devices. It should be noted that the specific type of terminal 11 is not limited in the embodiments of the present disclosure. .
  • the network device 12 may be a base station or a core network, where the above-mentioned base station may be a base station of 5G and later versions (for example: gNB, 5G NR NB, etc.), or a base station in other communication systems (for example: eNB, WLAN access point, Or other access points, etc.), where the base station can be called Node B, Evolved Node B, Access Point, Base Transceiver Station (BTS), Radio Base Station, Radio Transceiver, Basic Service Set (Basic Service Set) Service Set (BSS), Extended Service Set (ESS), Node B, Evolved Node B (eNB), Home Node B, Home Evolved Node B, WLAN Access Point, WiFi Node, or in the field
  • B Basic Service Set
  • BSS Basic Service Set
  • ESS Extended Service Set
  • Node B Evolved Node B
  • eNB Home Node B, Home Evolved Node B, WLAN Access Point, WiFi Node, or in the field
  • the base station may communicate with the terminal 11 under the control of the base station controller.
  • the base station controller may be a part of the core network or some base stations. Some base stations can communicate control information or user data with the core network through the backhaul. In some examples, some of these base stations may directly or indirectly communicate with each other through a backhaul link, which may be a wired or wireless communication link.
  • the wireless communication system can support operations on multiple carriers (waveform signals of different frequencies). Multi-carrier transmitters can simultaneously transmit modulated signals on these multiple carriers. For example, each communication link may be a multi-carrier signal modulated according to various radio technologies. Each modulated signal can be sent on a different carrier and can carry control information (for example, reference signals, control channels, etc.), overhead information, data, and so on.
  • the base station can wirelessly communicate with the terminal 11 via one or more access point antennas. Each base station can provide communication coverage for its corresponding coverage area. The coverage area of an access point can be divided into sectors that form only a part of the coverage area.
  • the wireless communication system may include different types of base stations (for example, a macro base station, a micro base station, or a pico base station).
  • the base station can also utilize different radio technologies, such as cellular or WLAN radio access technologies.
  • the base stations can be associated with the same or different access networks or operator deployments.
  • the coverage areas of different base stations may overlap.
  • the communication link in the wireless communication system may include an uplink for carrying uplink (Uplink, UL) transmission (for example, from the terminal 11 to the network device 12), or for carrying a downlink (DL) Transmission (for example, from the network device 12 to the terminal 11) downlink.
  • Uplink, UL transmission may also be referred to as reverse link transmission, and DL transmission may also be referred to as forward link transmission.
  • Downlink transmission can use licensed frequency bands, unlicensed frequency bands, or both.
  • uplink transmission can be performed using licensed frequency bands, unlicensed frequency bands, or both.
  • the embodiment of the present disclosure provides a random access method, which is applied to a terminal. As shown in FIG. 2, the method includes the following steps:
  • Step 21 Send a random access request message through the target carrier; where the target carrier is one of the first type of uplink carrier and the second type of uplink carrier.
  • the target carrier in the embodiment of the present disclosure may be a carrier initially selected by the terminal from the first type of uplink carrier and the second type of uplink carrier according to a preset selection rule.
  • the target carrier may also be that the terminal switches from one of the first type of uplink carrier and the second type of uplink carrier to the other of the two according to a preset change rule.
  • the first type of uplink carrier and the second type of uplink carrier may be carriers that work on unlicensed frequency bands or may be carriers that work on licensed carriers.
  • the frequencies of the first type of uplink carrier and the second type of uplink carrier are not the same.
  • the frequency of the first type of uplink carrier is higher than the frequency of the second type of uplink carrier, such as the first type
  • the uplink carrier of may be a standard uplink NUL carrier
  • the second type of uplink carrier may be a supplementary uplink SUL carrier.
  • the first type of uplink carrier in the embodiment of the present disclosure may be an uplink carrier operating in an unlicensed frequency band
  • the second type of uplink carrier may be a SUL carrier.
  • the first type of uplink carrier and the second type of uplink carrier are both uplink carriers operating in an unlicensed frequency band, and the frequency of the first type of uplink carrier is higher than the frequency of the second type of uplink carrier.
  • the first type of uplink carrier is a NUL carrier
  • the second type of uplink carrier is an uplink carrier on an operating unlicensed frequency band, and the frequency of the NUL carrier is higher than that of the second type of uplink carrier.
  • the random access request message mentioned in the embodiment of the present disclosure may be Message 1 (Message 1, Msg1) in the 4-step random access process, or Msg1 or Message A ( Message A, MsgA).
  • Scenario 1 The terminal initially selects the target carrier.
  • the random access method includes the following steps:
  • Step 31 Obtain threshold value information and channel measurement information.
  • the threshold value information is used to indicate the threshold values corresponding to different parameter items.
  • the channel measurement information includes: at least one item of first channel measurement information related to the uplink carrier of the first type and second channel measurement information related to the uplink carrier of the second type.
  • threshold value information and channel measurement information can be obtained through different methods or different processes.
  • threshold value information is obtained through system messages broadcast by network equipment, and channel measurement information is obtained by the terminal according to measurement configuration.
  • step 31 may be implemented by the following steps: receiving a system message sent by a network device by broadcasting, the system message carrying threshold information. And, acquiring the measurement configuration of at least one of the first type of uplink carrier and the second type of uplink carrier, and respectively measure at least one of the first type of uplink carrier and the second type of uplink carrier according to the measurement configuration , Get the corresponding channel measurement information.
  • the measurement configuration can be predefined, such as protocol agreement, etc., or configured by the network device, such as the network device through radio resource control (Radio Resource Control, RRC) signaling configuration.
  • RRC Radio Resource Control
  • Step 32 According to the threshold value information and the channel measurement information, one of the first type of uplink carrier and the second type of uplink carrier is selected as the target carrier.
  • the channel measurement information here may include: at least one of the first channel measurement information related to the first type of uplink carrier and the second channel measurement information related to the second type of uplink carrier. Accordingly, the terminal The target carrier can be selected flexibly according to the channel condition of the first type of uplink carrier or the channel condition of the second type of uplink carrier.
  • Step 33 Send a random access request message through the target carrier.
  • the random access request message mentioned here can be Msg1 in the 4-step random access process, or Msg1 or MsgA in the 2-step random access process.
  • step 32 can be implemented in the following manner: in the case that the threshold value information and the channel measurement information meet the first preset condition, the second type of uplink carrier is determined as the target carrier; wherein, the first preset condition includes At least one of the following:
  • the channel quality indicated by the quality parameter information of the path loss reference signal of the target downlink carrier is less than the first threshold, where the target downlink carrier corresponds to the first type of uplink carrier, or the target downlink carrier corresponds to the second type of uplink carrier .
  • the above-mentioned quality parameter information includes: Reference Signal Received Power (RSRP), Reference Signal Received Quality (RSRQ), Received Signal Strength Indicator (RSSI), and Signal and Interference Add at least one of the noise ratio (Signal to Interference plus Noise Ratio, SINR).
  • the parameter item in the first channel measurement information is greater than or equal to the second threshold value.
  • the parameter item in the second channel measurement information is smaller than the third threshold value.
  • the parameter items in the first channel measurement information and the second channel measurement information include: reference signal received quality RSRQ, received signal strength indicator RSSI, channel busy ratio (Channel Busy Ratio, CBR), and channel occupancy ratio (Channel occupancy Ratio, At least one of CR).
  • the second type of uplink carrier can be determined as the target carrier.
  • the uplink carrier of the first type is determined as the target carrier.
  • the first type of uplink carrier is an uplink carrier operating in an unlicensed frequency band
  • the second type of uplink carrier is an SUL carrier as an example for illustration.
  • the serving cell is configured with at least one uplink carrier working in an unlicensed frequency band and one SUL carrier working in a licensed frequency band.
  • the frequency of the SUL carrier is lower than that of the uplink carrier in the unlicensed frequency band;
  • the random access procedure initiated by the terminal may be based on competition 4-step random access process (4-step RACH), it may also be a 2-step random access process based on contention (2-step RACH), or it may be a random access process based on non-competition; network equipment does not explicitly Tell the terminal on which uplink carrier of this serving cell to perform random access.
  • the terminal is required to select the target carrier according to step 32.
  • the specific implementation of step 32 will be illustrated below in conjunction with specific examples.
  • the terminal determines that at least one of the following conditions is met: the measured RSRP of the path loss reference signal of the target downlink carrier is less than the first threshold, the channel occupation of the first type of uplink carrier (uplink carrier working in an unlicensed frequency band) The rate is greater than or equal to the second threshold, and the channel occupancy rate of the second type of uplink carrier (SUL carrier) is less than the third threshold; the terminal selects the SUL carrier to perform the random access process.
  • the above conditions include but are not limited to one of the following:
  • the RSRP of the path loss reference signal measured by the terminal is less than the first threshold
  • the channel occupancy rate of the first type of uplink carrier (uplink carrier working in an unlicensed frequency band) is greater than or equal to the second threshold;
  • the channel occupancy rate of the SUL carrier is less than the third threshold
  • the RSRP of the path loss reference signal measured by the terminal is less than the first threshold, and the channel occupancy rate of the first type of uplink carrier (uplink carrier working in an unlicensed frequency band) is greater than or equal to the second threshold;
  • the RSRP of the path loss reference signal measured by the terminal is less than the first threshold, and the channel occupancy rate of the SUL carrier is less than the third threshold;
  • the RSRP of the path loss reference signal measured by the terminal is less than the first threshold, and the channel occupancy rate of the first type of uplink carrier (uplink carrier working in an unlicensed frequency band) is greater than or equal to the second threshold, and the SUL carrier’s The channel occupancy rate is less than the third threshold;
  • the channel occupancy rate of the first type of uplink carrier (uplink carrier working in the unlicensed frequency band) is greater than or equal to the second threshold, and the channel occupancy rate of the SUL carrier is less than the third threshold.
  • the terminal determines that at least one of the following conditions is met: the measured RSRP of the path loss reference signal is less than the first threshold, and the channel busy rate of the first type of uplink carrier (uplink carrier working on an unlicensed frequency band) Greater than or equal to the second threshold, the channel busy rate of the second type of uplink carrier (SUL carrier) is less than the third threshold; then the terminal selects the SUL carrier for the random access process.
  • the above conditions include but are not limited to one of the following:
  • the RSRP of the path loss reference signal measured by the terminal is less than the first threshold
  • the channel busy rate of the first type of uplink carrier (uplink carrier working on the unlicensed frequency band) carrier is greater than or equal to the second threshold
  • the channel busy rate of the SUL carrier is less than the third threshold
  • the RSRP of the path loss reference signal measured by the terminal is less than the first threshold, and the channel busy rate of the first type of uplink carrier (uplink carrier working on the unlicensed frequency band) is greater than or equal to the second threshold;
  • the RSRP of the path loss reference signal measured by the terminal is less than the first threshold, and the channel busy rate of the SUL carrier is less than the third threshold;
  • the RSRP of the path loss reference signal measured by the terminal is less than the first threshold, and the channel busy rate of the first type of uplink carrier (uplink carrier working on the unlicensed frequency band) is greater than or equal to the second threshold, and the SUL carrier The channel busy rate of is less than the third threshold;
  • the channel busy rate of the first type of uplink carrier (uplink carrier working on the unlicensed frequency band) is greater than or equal to the second threshold, and the channel busy rate of the SUL carrier is less than the third threshold.
  • the embodiments of the present disclosure only take the quality parameter as RSRP as an example for description.
  • the conditions for any combination of the quality parameter as RSRP, RSRQ, RSSI, and SINR can refer to the above examples, so they will not be listed here.
  • this embodiment only takes CBR and CR as an example for description.
  • the condition that the parameter items in the channel measurement information are any combination of RSRQ, RSSI, CBR and CR can also be referred to The above examples will not be listed one by one. It is also worth noting that the specific values of the above-mentioned first threshold, second threshold, and third threshold are not specifically limited in the embodiments of the present disclosure, and those skilled in the art can set the values according to actual conditions. .
  • the terminal can select the target carrier from the first type of uplink carrier and the second type of uplink carrier according to the threshold information and channel measurement information, which can improve the flexibility of random access resource selection .
  • Scenario 2 The target carrier is changed.
  • the random access method includes the following steps:
  • Step 41 If the random access process corresponding to the random access message is not completed, if the preset change condition is met, the target carrier is changed.
  • the incomplete random access process mentioned here may be: the terminal triggers the random access process, but the random access is not completed.
  • the preset change conditions in the embodiments of the present disclosure are related to the channel quality. That is to say, when the terminal determines that the channel quality of the current target carrier is poor, it can change the target carrier, for example, change the target carrier from the first type of uplink carrier to the second type. Type of uplink carrier; or, the target carrier is changed from the second type of uplink carrier to the first type of uplink carrier.
  • Step 42 Send a random access request message through the target carrier.
  • Sending random access request messages through the changed target carrier can increase the success rate of random access and reduce the random access delay.
  • the random access request message mentioned here can be Msg1 in the 4-step random access process, or Msg1 or MsgA in the 2-step random access process.
  • the current target carrier is an uplink carrier of the first type as an example as an example. That is, in the case that the target carrier is the first type of uplink carrier, step 41 can be implemented by, but not limited to, the following manner: if the preset change condition is met, the target carrier is changed from the first type of uplink carrier to the first Two types of uplink carriers.
  • the preset change conditions include at least one of the following: the timer corresponding to the random access process expires; the counter corresponding to the random access process is equal to the fourth threshold; the first channel measurement information related to the first type of uplink carrier The parameter item of is greater than or equal to the second threshold; and the parameter item in the second channel measurement information related to the second type of uplink carrier is less than the third threshold.
  • the preset change conditions include but are not limited to one of the following:
  • the target carrier is an uplink carrier of the first type
  • the target carrier is changed from the uplink carrier of the first type to the uplink carrier of the second type.
  • the timer corresponding to the random access process expires, before the step of changing the target carrier from the first type of uplink carrier to the second type of uplink carrier, it further includes: completing the initial target carrier selection or completing the When the target carrier changes once, the timer corresponding to the random access process is started.
  • the terminal Take the first type of uplink carrier as the uplink carrier working in the unlicensed frequency band, and the second type of uplink carrier as the SUL carrier as an example.
  • the terminal selects the unlicensed frequency band during the random access initialization. After the uplink carrier, a timer is started. If the random access process is not completed and the timer expires, the terminal changes/transforms the target carrier into a SUL carrier and then performs the next random access attempt.
  • the serving cell is configured with at least one uplink carrier working in an unlicensed frequency band and one SUL carrier working in a licensed or unlicensed frequency band;
  • the random access procedure initiated by the terminal may be a 4-step random access procedure based on competition, or It may be a 2-step random access process based on contention, or it may be a random access process based on non-contention.
  • the terminal selects the uplink carrier on the unlicensed frequency band to perform the random access process, the first timer is started; if the random process is not completed and the first timer expires, the terminal switches to the SUL carrier at this time Perform the (subsequent) random access procedure.
  • P CMAX configured by the network device is equal to P CMAX,f,c of the SUL carrier.
  • the start duration of the first timer can be configured by the network device side through a broadcast message.
  • the counter corresponding to the random access process is equal to the fourth threshold
  • the method further includes: completing the initial target carrier After selecting or completing the last target carrier change, a counter corresponding to the random access process is set.
  • setting the counter includes initializing the counter or resetting the counter. For example, after the initial target carrier selection is completed, the counter corresponding to the random access process is initialized; after the last target carrier change is completed, the counter corresponding to the random access process is reset.
  • the terminal Take the first type of uplink carrier as the uplink carrier on the unlicensed frequency band, and the second type of uplink carrier as the SUL carrier as an example.
  • the terminal selects the uplink carrier on the unlicensed frequency band during random access initialization. After the carrier, if the random access process is not completed and a counter of the medium access control (MAC) layer of the terminal is equal to the fourth threshold, the terminal changes/converts the target carrier to a SUL carrier and performs the next random access Access attempts.
  • MAC medium access control
  • the serving cell is configured with at least one uplink carrier working in an unlicensed frequency band and one SUL carrier working in a licensed or unlicensed frequency band;
  • the random access procedure initiated by the terminal may be a 4-step random access procedure based on competition, or It may be a 2-step random access process based on contention, or it may be a random access process based on non-contention.
  • the terminal selects the uplink carrier on the unlicensed frequency band for the random access process, the first counter is set. If the random process is not completed, the terminal selects the uplink carrier on the unlicensed frequency band to continue the random access process and the first counter is equal to
  • the terminal switches to the SUL carrier to perform the (subsequent) random access procedure.
  • P CMAX configured by the network device is equal to P CMAX,f,c of the SUL carrier.
  • the fourth threshold value corresponding to the counter can be configured by the network device side through a broadcast message.
  • the parameter item in the first channel measurement information related to the first type of uplink carrier is greater than or equal to the second threshold
  • the parameter item in the second channel measurement information related to the second type of uplink carrier is smaller than the third threshold.
  • step 41 it further includes: acquiring threshold value information and channel measurement information; wherein, the channel measurement information includes: at least one of the first channel measurement information and the second channel measurement information.
  • Threshold value information includes but is not limited to: threshold values corresponding to each parameter item in the channel measurement information, such as the first threshold value, the second threshold value, the third threshold value, and the fourth threshold value.
  • threshold value information and channel measurement information can be obtained through different methods or different processes. For example, threshold value information is obtained through system messages broadcast by network equipment, and channel measurement information is obtained by the terminal according to measurement configuration. . It is worth pointing out that there is no strict time sequence between the threshold value information acquisition process and the channel measurement information acquisition process. You can first obtain the threshold value information and then the channel measurement information, or you can first obtain the channel measurement information and then the threshold value. Information, you can also obtain channel measurement information and threshold information at the same time.
  • the parameter items in the channel measurement information include: at least one of reference signal received quality RSRQ, received signal strength indicator RSSI, channel busy rate CBR, and channel occupancy rate CR.
  • the preset change condition in this embodiment may be a condition between any combination of RSRQ, RSSI, CBR, and CR in the channel measurement information and the corresponding threshold value. It is also worth noting that the specific values of the above-mentioned first threshold, second threshold, and third threshold are not specifically limited in the embodiments of the present disclosure, and those skilled in the art can set the values according to actual conditions. .
  • the timer corresponding to the random access process times out, and the counter corresponding to the random access process is equal to the fourth threshold.
  • the timer corresponding to the random access process expires, and the parameter item in the first channel measurement information related to the first type of uplink carrier is greater than or equal to the second threshold.
  • the timer corresponding to the random access process expires, and the parameter item in the second channel measurement information related to the second type of uplink carrier is less than the third threshold.
  • the timer corresponding to the random access process expires, the counter corresponding to the random access process is equal to the fourth threshold, and the parameter item in the first channel measurement information related to the first type of uplink carrier is greater than or equal to the second Threshold value.
  • the timer corresponding to the random access process expires, the counter corresponding to the random access process is equal to the fourth threshold, and the parameter item in the second channel measurement information related to the second type of uplink carrier is less than the third threshold value.
  • the parameter item in the first channel measurement information related to the first type of uplink carrier is greater than or equal to the second threshold, and the second type of uplink carrier is related to the second threshold.
  • the parameter item in the two-channel measurement information is less than the third threshold.
  • the timer corresponding to the random access process expires, the counter corresponding to the random access process is equal to the fourth threshold, and the parameter item in the first channel measurement information related to the first type of uplink carrier is greater than or equal to the second threshold.
  • the parameter item in the second channel measurement information related to the second type of uplink carrier is smaller than the third threshold.
  • the counter corresponding to the random access process is equal to the fourth threshold, and the parameter item in the first channel measurement information related to the first type of uplink carrier is greater than or equal to the second threshold.
  • the counter corresponding to the random access process is equal to the fourth threshold, and the parameter item in the second channel measurement information related to the second type of uplink carrier is less than the third threshold.
  • the counter corresponding to the random access process is equal to the fourth threshold, and the parameter item in the first channel measurement information related to the first type of uplink carrier is greater than or equal to the second threshold, and is consistent with the second type of uplink
  • the parameter item in the second channel measurement information related to the carrier is smaller than the third threshold.
  • the parameter item in the first channel measurement information related to the first type of uplink carrier is greater than or equal to the second threshold, and the parameter item in the second channel measurement information related to the second type of uplink carrier is less than the first Three thresholds.
  • the counter in the embodiment of the present disclosure is used to record at least one of the following information:
  • the number of times the random access request message is sent in the random access process includes but is not limited to Msg1 or MsgA, where Msg1 or MsgA carries a preamble.
  • This counter is used to record the number of times Msg1 is sent, or to record MsgA
  • the counter can be a preamble transmission counter (Preamble transmission counter) or MsgA transmission counter (MsgA transmission counter);
  • the counter may be a power ramping counter
  • the number of channel listening failures during the random access process may be a listen-before-speak failure counter (LBT failure counter).
  • LBT failure counter listen-before-speak failure counter
  • the terminal can change the target carrier when the random access is not completed, which improves the success rate of random access and reduces the delay of random access.
  • scenario 1 and scenario 2 can be implemented separately or in combination, and the embodiments of the present disclosure do not specifically limit this.
  • only the first type of uplink carrier may be an uplink carrier operating in an unlicensed frequency band
  • the second type of uplink carrier may be an SUL carrier as an example to illustrate scenario one and scenario two.
  • the first type The uplink carrier of the second type and the uplink carrier of the second type are both uplink carriers operating in an unlicensed frequency band, and the frequency of the first type of uplink carrier is higher than the frequency of the second type of uplink carrier; or, the first type of uplink carrier
  • the uplink carrier is a NUL carrier
  • the second type of uplink carrier is an uplink carrier on an unlicensed frequency band
  • the frequency of the NUL carrier is higher than that of the second type of uplink carrier
  • the terminal can select between the first type of uplink carrier and the second type of uplink carrier, which can improve the flexibility of random access resource selection, and can also be used when random access is not completed. Change the target carrier to improve the success rate of random access and reduce the delay of random access.
  • the terminal 500 of the embodiment of the present disclosure can send the random access request message through the target carrier in the above embodiment; where the target carrier is the first type of uplink carrier and the second type of uplink carrier.
  • the terminal 500 specifically includes the following functional modules:
  • the sending module 510 is configured to send a random access request message through a target carrier; the target carrier is one of the first type of uplink carrier and the second type of uplink carrier.
  • the terminal 500 further includes:
  • the first obtaining module 520 is configured to obtain threshold value information and channel measurement information; where the channel measurement information includes: first channel measurement information related to the first type of uplink carrier, and information related to the second type of uplink carrier At least one item of the second channel measurement information;
  • the selection module 530 is configured to select one of the first type of uplink carrier and the second type of uplink carrier as the target carrier according to the threshold value information and the channel measurement information.
  • the selection module includes:
  • the first selection submodule is configured to determine the second type of uplink carrier as the target carrier when the threshold value information and the channel measurement information meet the first preset condition; wherein, the first preset condition includes at least one of the following item:
  • the channel quality indicated by the quality parameter information of the path loss reference signal of the target downlink carrier is less than the first threshold, where the target downlink carrier corresponds to the first type of uplink carrier, or the target downlink carrier corresponds to the second type of uplink carrier ;
  • the parameter item in the first channel measurement information is greater than or equal to the second threshold
  • the parameter item in the second channel measurement information is smaller than the third threshold value.
  • the quality parameter information includes at least one of reference signal received power RSRP, reference signal received quality RSRQ, received signal strength indicator RSSI, and signal to interference plus noise ratio SINR.
  • the terminal 500 further includes:
  • the changing module 540 is configured to change the target carrier if the preset changing condition is met when the random access process corresponding to the random access message is not completed.
  • the change module 540 includes:
  • the change submodule is used to change the target carrier from the first type of uplink carrier to the second type of uplink carrier if the target carrier is the first type of uplink carrier, if the preset change condition is met;
  • the change conditions include at least one of the following:
  • the timer corresponding to the random access process expires
  • the parameter item in the first channel measurement information related to the first type of uplink carrier is greater than or equal to the second threshold
  • the parameter item in the second channel measurement information related to the second type of uplink carrier is smaller than the third threshold
  • the counter corresponding to the random access process is equal to the fourth threshold.
  • the terminal 500 also includes:
  • the start module is used to start the timer corresponding to the random access process after the initial target carrier selection is completed or the last target carrier change is completed;
  • the setting module is used to set the counter corresponding to the random access process after the initial target carrier selection is completed or the last target carrier change is completed;
  • the second acquisition module is configured to acquire threshold value information and channel measurement information; wherein the channel measurement information includes: at least one of the first channel measurement information and the second channel measurement information.
  • the counter is used to record at least one of the following information:
  • the above-mentioned parameter items include: at least one of reference signal reception quality RSRQ, received signal strength indicator RSSI, channel busy rate CBR, and channel occupancy rate CR.
  • the first type of uplink carrier is a standard uplink NUL carrier
  • the second type of uplink carrier is a supplementary uplink SUL carrier.
  • the terminal of the embodiment of the present disclosure can choose between the first type of uplink carrier and the second type of uplink carrier, which can improve the resource selection flexibility of the random access request message. In addition, it can also be used when random access is not completed. Change the target carrier at time to improve the success rate of random access and reduce the delay of random access.
  • the division of the various modules of the above terminal is only a division of logical functions, and may be fully or partially integrated into a physical entity during actual implementation, or may be physically separated.
  • these modules can all be implemented in the form of software called by processing elements; they can also be implemented in the form of hardware; part of the modules can be implemented in the form of calling software by processing elements, and some of the modules can be implemented in the form of hardware.
  • the determination module may be a separately established processing element, or it may be integrated in a chip of the above-mentioned device for implementation.
  • each step of the above method or each of the above modules can be completed by hardware integrated logic circuits in the processor element or instructions in the form of software.
  • the above modules may be one or more integrated circuits configured to implement the above methods, such as: one or more application specific integrated circuits (ASIC), or one or more microprocessors (digital signal processor, DSP), or one or more Field Programmable Gate Array (FPGA), etc.
  • ASIC application specific integrated circuit
  • DSP digital signal processor
  • FPGA Field Programmable Gate Array
  • the processing element may be a general-purpose processor, such as a central processing unit (CPU) or other processors that can call program codes.
  • CPU central processing unit
  • these modules can be integrated together and implemented in the form of a system-on-a-chip (SOC).
  • SOC system-on-a-chip
  • FIG. 8 is a schematic diagram of the hardware structure of a terminal for implementing various embodiments of the present disclosure.
  • the terminal 80 includes but is not limited to: a radio frequency unit 81, a network module 82, an audio output unit 83, Input unit 84, sensor 85, display unit 86, user input unit 87, interface unit 88, memory 89, processor 810, power supply 811 and other components.
  • a radio frequency unit 81 for a radio frequency unit
  • the terminal 80 includes but is not limited to: a radio frequency unit 81, a network module 82, an audio output unit 83, Input unit 84, sensor 85, display unit 86, user input unit 87, interface unit 88, memory 89, processor 810, power supply 811 and other components.
  • the terminal structure shown in FIG. 8 does not constitute a limitation on the terminal, and the terminal may include more or less 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
  • the radio frequency unit 81 is configured to send a random access request message through a target carrier; where the target carrier is one of a first type of uplink carrier and a second type of uplink carrier;
  • the processor 810 is configured to control the radio frequency unit 81 to send and receive data;
  • the terminal of the embodiment of the present disclosure can choose between the first type of uplink carrier and the second type of uplink carrier, which can improve the flexibility of random access resource selection. In addition, it can also change the target carrier when random access is not completed to improve random access. The access success rate reduces the random access delay.
  • the radio frequency unit 81 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 810; Uplink data is sent to the base station.
  • the radio frequency unit 81 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 81 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 82, such as helping users to send and receive emails, browse web pages, and access streaming media.
  • the audio output unit 83 can convert the audio data received by the radio frequency unit 81 or the network module 82 or stored in the memory 89 into an audio signal and output it as sound. Moreover, the audio output unit 83 may also provide audio output related to a specific function performed by the terminal 80 (for example, call signal reception sound, message reception sound, etc.).
  • the audio output unit 83 includes a speaker, a buzzer, a receiver, and the like.
  • the input unit 84 is used to receive audio or video signals.
  • the input unit 84 may include a graphics processing unit (GPU) 841 and a microphone 842, and the graphics processor 841 is configured to respond to still pictures or video images obtained by an image capture device (such as a camera) in the video capture mode or the image capture mode. Data is processed.
  • the processed image frame can be displayed on the display unit 86.
  • the image frame processed by the graphics processor 841 may be stored in the memory 89 (or other storage medium) or sent via the radio frequency unit 81 or the network module 82.
  • the microphone 842 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 the mobile communication base station via the radio frequency unit 81 for output in the case of a telephone call mode.
  • the terminal 80 also includes at least one sensor 85, 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 861 according to the brightness of the ambient light.
  • the proximity sensor can close the display panel 861 and/or when the terminal 80 is moved to the ear. Or backlight.
  • the accelerometer sensor can detect the magnitude of acceleration in various directions (usually three axes), 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 85 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 86 is used to display information input by the user or information provided to the user.
  • the display unit 86 may include a display panel 861, and the display panel 861 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 87 can be used to receive inputted numeric or character information and generate key signal inputs related to user settings and function control of the terminal.
  • the user input unit 87 includes a touch panel 871 and other input devices 872.
  • the touch panel 871 also called a touch screen, can collect the user's 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 871 or near the touch panel 871. operating).
  • the touch panel 871 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 810, the command sent by the processor 810 is received and executed.
  • the touch panel 871 can be realized in multiple types such as resistive, capacitive, infrared, and surface acoustic wave.
  • the user input unit 87 may also include other input devices 872.
  • other input devices 872 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 871 can be overlaid on the display panel 861.
  • the touch panel 871 detects a touch operation on or near it, it transmits it to the processor 810 to determine the type of the touch event.
  • the type of event provides corresponding visual output on the display panel 861.
  • the touch panel 871 and the display panel 861 are used as two independent components to realize the input and output functions of the terminal, but in some embodiments, the touch panel 871 and the display panel 861 can be integrated. Realize the input and output functions of the terminal, which are not limited here.
  • the interface unit 88 is an interface for connecting an external device and the terminal 80.
  • 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 88 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 80 or may be used to communicate between the terminal 80 and the external device. Transfer data between.
  • the memory 89 can be used to store software programs and various data.
  • the memory 89 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 89 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 810 is the control center of the terminal. It uses various interfaces and lines to connect the various parts of the entire terminal. It executes by running or executing software programs and/or modules stored in the memory 89 and calling data stored in the memory 89. Various functions of the terminal and processing data, so as to monitor the terminal as a whole.
  • the processor 810 may include one or more processing units; optionally, the processor 810 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 810.
  • the terminal 80 may also include a power source 811 (such as a battery) for supplying power to various components.
  • a power source 811 such as a battery
  • the power source 811 may be logically connected to the processor 810 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 80 includes some functional modules not shown, which will not be repeated here.
  • the embodiment of the present disclosure further provides a terminal, including a processor 810, a memory 89, and a computer program stored on the memory 89 and capable of running on the processor 810.
  • a terminal including a processor 810, a memory 89, and a computer program stored on the memory 89 and capable of running on the processor 810.
  • the terminal can be a wireless terminal or a wired terminal.
  • the wireless terminal can be a device that provides voice and/or other service data connectivity to the user, a handheld device with wireless connection function, or other processing equipment connected to a wireless modem .
  • a wireless terminal can communicate with one or more core networks via a Radio Access Network (RAN).
  • RAN Radio Access Network
  • the wireless terminal can be a mobile terminal, such as a mobile phone (or "cellular" phone) and a computer with a mobile terminal
  • a mobile terminal such as a mobile phone (or "cellular" phone) and a computer with a mobile terminal
  • they can be portable, pocket-sized, handheld, computer-built or vehicle-mounted mobile devices, which exchange language and/or data with the wireless access network.
  • PCS Personal Communication Service
  • SIP Session Initiation Protocol
  • WLL Wireless Local Loop
  • PDA Personal Digital Assistants
  • Wireless terminal can also be called system, subscriber unit (Subscriber Unit), subscriber station (Subscriber Station), mobile station (Mobile Station), mobile station (Mobile), remote station (Remote Station), remote terminal (Remote Terminal), connection The access terminal (Access Terminal), user terminal (User Terminal), user agent (User Agent), and user equipment (User Device or User Equipment) are not limited here.
  • the embodiments of the present disclosure also provide a computer-readable storage medium, and a computer program is stored on the computer-readable storage medium.
  • a computer program is stored on the computer-readable storage medium.
  • 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 disclosed device and method may be implemented in other ways.
  • the device embodiments described above are only illustrative.
  • the division of the units is only a logical function division, and there may be other divisions in actual implementation, for example, multiple units or components can be combined or It can be integrated into another system, or some features can be ignored or not implemented.
  • the displayed or discussed mutual coupling or direct coupling or communication connection may be indirect coupling or communication connection through some interfaces, devices or units, and may be in electrical, mechanical or other forms.
  • the units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, they may be located in one place, or they may be distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the objectives of the solutions of the embodiments.
  • the functional units in the various embodiments of the present disclosure may be integrated into one processing unit, or each unit may exist alone physically, or two or more units may be integrated into one unit.
  • the function is implemented in the form of a software function unit and sold or used as an independent product, it can be stored in a computer readable storage medium.
  • the technical solution of the present disclosure essentially or the part that contributes to the related technology or the part of the technical solution can be embodied in the form of a software product.
  • the computer software product is stored in a storage medium, including several
  • the instructions are used to make a computer device (which may be a personal computer, a server, or a network device, etc.) execute all or part of the steps of the methods described in the various embodiments of the present disclosure.
  • the aforementioned storage media include: U disk, mobile hard disk, ROM, RAM, magnetic disk or optical disk and other media that can store program codes.
  • each component or each step can be decomposed and/or recombined. These decomposition and/or recombination should be regarded as equivalent solutions of the present disclosure.
  • the steps of performing the above-mentioned series of processing can naturally be performed in chronological order in the order of description, but do not necessarily need to be performed in chronological order, and some steps can be performed in parallel or independently of each other.
  • Those of ordinary skill in the art can understand that all or any of the steps or components of the method and device of the present disclosure can be used in any computing device (including a processor, storage medium, etc.) or a network of computing devices with hardware and firmware. , Software, or a combination of them. This can be achieved by those of ordinary skill in the art using their basic programming skills after reading the description of the present disclosure.
  • the purpose of the present disclosure can also be realized by running a program or a group of programs on any computing device.
  • the computing device may be a well-known general-purpose device. Therefore, the purpose of the present disclosure can also be achieved only by providing a program product including program code for implementing the method or device. That is, such a program product also constitutes the present disclosure, and a storage medium storing such a program product also constitutes the present disclosure.
  • the storage medium may be any well-known storage medium or any storage medium developed in the future. It should also be pointed out that, in the device and method of the present disclosure, obviously, each component or each step can be decomposed and/or recombined.

Abstract

本公开公开了一种随机接入方法及终端，该方法包括：通过目标载波，发送随机接入请求消息；其中，目标载波为第一类型的上行载波和第二类型的上行载波中的一个。

Description

随机接入方法及终端
相关申请的交叉引用
本申请主张在2019年1月25日在中国提交的中国专利申请号No.201910075298.5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，尤其涉及一种随机接入方法及终端。
背景技术
在第五代(5 th Generation，5G)移动通信系统，或称为新空口(New Radio，NR)系统中，为了能够增强NR上行覆盖和提高频谱效率，引入了补充上行(Supplement Uplink，SUL)载波，即服务小区可同时配置标准上行(Normal Uplink，NUL)载波和SUL载波。进一步地，在移动通信系统中，非授权频段(unlicensed band)可以作为授权频段(licensed band)的补充，以帮助运营商对服务进行扩容。那么当服务小区同时配置了授权频段和非授权频段的上行载波，可以将授权频段的上行载波作为SUL载波以及将非授权频段的上行载波作为另一个上行载波。
在服务小区仅配置一个上行载波时，终端可通过该上行载波进行随机接入过程，如通过该上行载波发送随机接入请求消息以发起随机接入。但是在服务小区同时配置了SUL载波和NUL载波的情况下，如果网络设备未显式指示终端采用哪个载波进行随机接入过程。进一步地，对于多个上行载波的频段类型不同时，由于存在非授权频段上的上行载波终端无法确定采用哪个载波进行随机接入过程，若采用不合理的载波可能会导致随机接入过程失败。
发明内容
本公开实施例提供了一种随机接入方法及终端，以解决存在非授权频段的上行载波的场景下，因选择不合理的载波进行随机接入过程，而导致随机接入过程成功率低的问题。
第一方面，本公开实施例提供了一种随机接入方法，应用于终端侧，包括：
通过目标载波，发送随机接入请求消息；其中，目标载波为第一类型的上行载波和第二类型的上行载波中的一个。
第二方面，本公开实施例还提供了一种终端，包括：
发送模块，用于通过目标载波，发送随机接入请求消息；其中，目标载波为第一类型的上行载波和第二类型的上行载波中的一个。
第三方面，本公开实施例提供了一种终端，终端包括处理器、存储器以及存储于存储器上并在处理器上运行的计算机程序，计算机程序被处理器执行时实现上述的随机接入方法的步骤。
第四方面，本公开实施例提供了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，计算机程序被处理器执行时实现上述的随机接入方法的步骤。
这样，本公开实施例的终端可在第一类型的上行载波和第二类型的上行载波中选择可提高随机接入资源选择的灵活性，另外还可在随机接入未完成时变更目标载波，提高随机接入的成功率，减少随机接入时延。
附图说明
为了更清楚地说明本公开实施例的技术方案，下面将对本公开实施例的描述中所需要使用的附图作简单地介绍，显而易见地，下面描述中的附图仅仅是本公开的一些实施例，对于本领域普通技术人员来讲，在不付出创造性劳动性的前提下，还可以根据这些附图获得其他的附图。
图1表示本公开实施例可应用的一种移动通信系统框图；
图2表示本公开实施例的随机接入方法的流程示意图；
图3表示本公开实施例场景一的随机接入方法的流程示意图；
图4表示本公开实施例场景二的随机接入方法的流程示意图；
图5表示本公开实施例终端的模块结构示意图一；
图6表示本公开实施例终端的模块结构示意图二；
图7表示本公开实施例终端的模块结构示意图三；
图8表示本公开实施例的终端框图。
具体实施方式
下面将参照附图更详细地描述本公开的示例性实施例。虽然附图中显示了本公开的示例性实施例，然而应当理解，可以以各种形式实现本公开而不应被这里阐述的实施例所限制。相反，提供这些实施例是为了能够更透彻地理解本公开，并且能够将本公开的范围完整的传达给本领域的技术人员。
本申请的说明书和权利要求书中的术语“第一”、“第二”等是用于区别类似的对象，而不必用于描述特定的顺序或先后次序。应该理解这样使用的数据在适当情况下可以互换，以便这里描述的本申请的实施例能够以除了在这里图示或描述的那些以外的顺序实施。此外，术语“包括”和“具有”以及他们的任何变形，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。说明书以及权利要求中“和/或”表示所连接对象的至少其中之一。
本文所描述的技术不限于长期演进型(Long Term Evolution，LTE)/LTE的演进(LTE-Advanced，LTE-A)系统，并且也可用于各种无线通信系统，诸如码分多址(Code Division Multiple Access，CDMA)、时分多址(Time Division Multiple Access，TDMA)、频分多址(Frequency Division Multiple Access，FDMA)、正交频分多址(Orthogonal Frequency Division Multiple Access，OFDMA)、单载波频分多址(Single-carrier Frequency-Division Multiple Access，SC-FDMA)和其他系统。术语“系统”和“网络”常被可互换地使用。本文所描述的技术既可用于以上提及的系统和无线电技术，也可用于其他系统和无线电技术。然而，以下描述出于示例目的描述了NR系统，并且在以下大部分描述中使用NR术语，尽管这些技术也可应用于NR系统应用以外的应用。
以下描述提供示例而并非限定权利要求中阐述的范围、适用性或者配置。可以对所讨论的要素的功能和布置作出改变而不会脱离本公开的精神和范围。 各种示例可恰适地省略、替代、或添加各种规程或组件。例如，可以按不同于所描述的次序来执行所描述的方法，并且可以添加、省去、或组合各种步骤。另外，参照某些示例所描述的特征可在其他示例中被组合。
请参见图1，图1示出本公开实施例可应用的一种无线通信系统的框图。无线通信系统包括终端11和网络设备12。其中，终端11也可以称作终端设备或者用户终端(User Equipment，UE)，终端11可以是手机、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)、可穿戴式设备(Wearable Device)或车载设备等终端侧设备，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。网络设备12可以是基站或核心网，其中，上述基站可以是5G及以后版本的基站(例如：gNB、5G NR NB等)，或者其他通信系统中的基站(例如：eNB、WLAN接入点、或其他接入点等)，其中，基站可被称为节点B、演进节点B、接入点、基收发机站(Base Transceiver Station，BTS)、无线电基站、无线电收发机、基本服务集(Basic Service Set，BSS)、扩展服务集(Extended Service Set，ESS)、B节点、演进型B节点(eNB)、家用B节点、家用演进型B节点、WLAN接入点、WiFi节点或所述领域中其他某个合适的术语，只要达到相同的技术效果，所述基站不限于特定技术词汇，需要说明的是，在本公开实施例中仅以NR系统中的基站为例，但是并不限定基站的具体类型。
基站可在基站控制器的控制下与终端11通信，在各种示例中，基站控制器可以是核心网或某些基站的一部分。一些基站可通过回程与核心网进行控制信息或用户数据的通信。在一些示例中，这些基站中的一些可以通过回程链路直接或间接地彼此通信，回程链路可以是有线或无线通信链路。无线通信系统可支持多个载波(不同频率的波形信号)上的操作。多载波发射机能同时在这多个载波上传送经调制信号。例如，每条通信链路可以是根据各种无线电技术来调制的多载波信号。每个已调信号可在不同的载波上发送并且可携带控制信息(例如，参考信号、控制信道等)、开销信息、数据等。
基站可经由一个或多个接入点天线与终端11进行无线通信。每个基站可以为各自相应的覆盖区域提供通信覆盖。接入点的覆盖区域可被划分成仅构 成该覆盖区域的一部分的扇区。无线通信系统可包括不同类型的基站(例如宏基站、微基站、或微微基站)。基站也可利用不同的无线电技术，诸如蜂窝或WLAN无线电接入技术。基站可以与相同或不同的接入网或运营商部署相关联。不同基站的覆盖区域(包括相同或不同类型的基站的覆盖区域、利用相同或不同无线电技术的覆盖区域、或属于相同或不同接入网的覆盖区域)可以交叠。
无线通信系统中的通信链路可包括用于承载上行链路(Uplink，UL)传输(例如，从终端11到网络设备12)的上行链路，或用于承载下行链路(Downlink，DL)传输(例如，从网络设备12到终端11)的下行链路。UL传输还可被称为反向链路传输，而DL传输还可被称为前向链路传输。下行链路传输可以使用授权频段、非授权频段或这两者来进行。类似地，上行链路传输可以使用有授权频段、非授权频段或这两者来进行。
本公开实施例提供了一种随机接入方法，应用于终端，如图2所示，该方法包括以下步骤：
步骤21：通过目标载波，发送随机接入请求消息；其中，目标载波为第一类型的上行载波和第二类型的上行载波中的一个。
其中，本公开实施例中的目标载波可以是终端按照预设选择规则，在第一类型的上行载波和第二类型的上行载波中初始选择出的载波。目标载波还可以是终端按照预设变更规则，由第一类型的上行载波和第二类型的上行载波中的一个切换为这两者中另一个载波。
其中，第一类型的上行载波和第二类型的上行载波可以是工作在非授权频段上的载波也可以是工作在授权载波上的载波。另一方面，第一类型的上行载波和第二类型的上行载波的频率也不相同，可选地，第一类型的上行载波的频率高于第二类型的上行载波的频率，例如第一类型的上行载波可以是标准上行NUL载波，第二类型的上行载波可以是补充上行SUL载波。进一步地，本公开实施例中第一类型的上行载波可以是工作在非授权频段上的上行载波，第二类型的上行载波可以是SUL载波。或者，第一类型的上行载波和第二类型的上行载波均为工作在非授权频段上的上行载波，且第一类型的上行载波的频率高于第二类型的上行载波的频率。或者，第一类型的上行载 波为NUL载波，第二类型的上行载波为工作非授权频段上的上行载波，且NUL载波的频率高于第二类型的上行载波。
进一步地，本公开实施例所说的随机接入请求消息可以是4步随机接入过程中的消息一(Message 1，Msg1)，也可以是2步随机接入过程中的Msg1或消息A(Message A，MsgA)。
下面本公开实施例将结合初始选择目标载波和目标载波变更两个场景，分别介绍本公开实施例的随机接入方法。
场景一、终端初始选择目标载波。
如图3所示，该随机接入方法包括以下步骤：
步骤31：获取门限值信息和信道测量信息。
其中，门限值信息用于指示不同参数项对应的门限值。信道测量信息包括：与第一类型的上行载波相关的第一信道测量信息，以及与第二类型的上行载波相关的第二信道测量信息中的至少一项。
进一步地，门限值信息和信道测量信息可以通过不同方式或不同流程获取得到，例如门限值信息是通过网络设备广播的系统消息获取到的，信道测量信息是终端根据测量配置进行测量得到的。可选地，步骤31可以通过以下步骤实现：接收网络设备通过广播发送的系统消息，该系统消息中携带有门限值信息。以及，获取第一类型的上行载波和第二类型的上行载波中至少一项的测量配置，根据该测量配置分别对第一类型的上行载波和第二类型的上行载波中的至少一项进行测量，得到相应的信道测量信息。其中测量配置可以是预定义，如协议约定等，也可以是网络设备配置的，如网络设备通过无线资源控制(Radio Resource Control，RRC)信令配置等。值得指出的是，门限值信息的获取过程与信道测量信息的获取过程没有严格的时序过程，可以先获取门限值信息再获取信道测量信息，也可以先获取信道测量信息再获取门限值信息，还可以同时获取信道测量信息和门限值信息。
步骤32：根据门限值信息和信道测量信息，在第一类型的上行载波和第二类型的上行载波中选择一个作为目标载波。
其中，这里的信道测量信息可以包括：与第一类型的上行载波相关的第一信道测量信息，以及与第二类型的上行载波相关的第二信道测量信息中的 至少一项，相应地，终端可灵活地根据第一类型的上行载波的信道情况或第二类型的上行载波的信道情况，来选择目标载波。
步骤33：通过目标载波，发送随机接入请求消息。
这里所说的随机接入请求消息可以是4步随机接入过程中的Msg1，也可以是2步随机接入过程中的Msg1或MsgA。
进一步地，步骤32可通过以下方式实现：在门限值信息和信道测量信息满足第一预设条件的情况下，将第二类型的上行载波确定为目标载波；其中，第一预设条件包括以下至少一项：
目标下行载波的路损参考信号的质量参数信息指示的信道质量小于第一门限值，其中，目标下行载波与第一类型的上行载波对应，或者，目标下行载波与第二类型的上行载波对应。其中，上述质量参数信息包括：参考信号接收功率(Reference Signal Received Power，RSRP)、参考信号接收质量(Reference Signal Received Quality，RSRQ)、接收信号强度指示(Received Signal Strength Indicator，RSSI)以及信号与干扰加噪声比(Signal to Interference plus Noise Ratio，SINR)中的至少一项。
第一信道测量信息中的参数项大于或等于第二门限值。
第二信道测量信息中的参数项小于第三门限值。
其中，第一信道测量信息和第二信道测量信息中的参数项包括：参考信号接收质量RSRQ、接收信号强度指示RSSI、信道繁忙率(Channel Busy Ratio，CBR)和信道占用率(Channel occupancy Ratio，CR)中的至少一项。
也就是说，在门限值信息和信道测量信息满足以上条件中的至少一项时，可将第二类型的上行载波确定的目标载波。另一方面，若门限值信息和信道测量信息不满足第一预设条件，则将第一类型的上行载波确定为目标载波。
下面本公开实施例以第一类型的上行载波为工作在非授权频段上的上行载波，第二类型的上行载波为SUL载波为例进行示例性说明。服务小区至少配置一个工作在非授权频段的上行载波、一个工作在授权频段的SUL载波，该SUL载波的频率比非授权频段的上行载波的低；终端发起的随机接入过程可能是基于竞争的4步随机接入过程(4-step RACH)，也可能是基于竞争的2步随机接入过程(2-step RACH)，还可能是基于非竞争的随机接入过程；网 络设备未显式地告诉终端在这个服务小区的哪个上行载波上进行随机接入，这时需要终端可以根据步骤32来选择目标载波，下面将结合具体示例对步骤32的具体实现方式做示例性说明。
如果终端确定满足以下条件中的至少一项：测量到目标下行载波的路损参考信号的RSRP小于第一门限值，第一类型的上行载波(工作在非授权频段的上行载波)的信道占用率大于或等于第二门限值，第二类型的上行载波(SUL载波)的信道占用率小于第三门限值；则终端选择SUL载波进行随机接入过程。
其中，上述条件包括但不限于以下其中一种：
终端测量到路损参考信号的RSRP小于第一门限值；
第一类型的上行载波(工作在非授权频段的上行载波)的信道占用率大于或等于第二门限值；
SUL载波的信道占用率小于第三门限值；
终端测量到路损参考信号的RSRP小于第一门限值，且第一类型的上行载波(工作在非授权频段的上行载波)的信道占用率大于或等于第二门限值；
终端测量到路损参考信号的RSRP小于第一门限值，且SUL载波的信道占用率小于第三门限值；
终端测量到路损参考信号的RSRP小于第一门限值，且第一类型的上行载波(工作在非授权频段的上行载波)的信道占用率大于或等于第二门限值，且SUL载波的信道占用率小于第三门限值；
第一类型的上行载波(工作在非授权频段的上行载波)的信道占用率大于或等于第二门限值，且SUL载波的信道占用率小于第三门限值。
或者，如果终端确定满足以下条件中的至少一项：测量到路损参考信号的RSRP小于第一门限值，第一类型的上行载波(工作在非授权频段上的上行载波)的信道繁忙率大于或等于第二门限值，第二类型的上行载波(SUL载波)的信道繁忙率小于第三门限值；则终端选择SUL载波进行随机接入过程。
其中，上述条件包括但不限于以下其中一种：
终端测量到路损参考信号的RSRP小于第一门限值；
第一类型的上行载波(工作在非授权频段上的上行载波)载波的信道繁 忙率大于或等于第二门限值；
SUL载波的信道繁忙率小于第三门限值；
终端测量到路损参考信号的RSRP小于第一门限值，且第一类型的上行载波(工作在非授权频段上的上行载波)的信道繁忙率大于或等于第二门限值；
终端测量到路损参考信号的RSRP小于第一门限值，且SUL载波的信道繁忙率小于第三门限值；
终端测量到路损参考信号的RSRP小于第一门限值，且第一类型的上行载波(工作在非授权频段上的上行载波)的信道繁忙率大于或等于第二门限值，且SUL载波的信道繁忙率小于第三门限值；
第一类型的上行载波(工作在非授权频段上的上行载波)的信道繁忙率大于或等于第二门限值，且SUL载波的信道繁忙率小于第三门限值。
本公开实施例仅以质量参数为RSRP为例进行说明，质量参数为RSRP、RSRQ、RSSI和SINR中的任何组合的条件均可参照上述示例，故在此不再一一列举。相应地，对于信道测量信息中的参数项，本实施例也仅以CBR和CR为例进行说明，信道测量信息中参数项为RSRQ、RSSI、CBR和CR中的任何组合的条件也均可参照上述示例，不再一一列举。另外值得指出的是，本公开实施例中不对上述第一门限值、第二门限值和第三门限值的具体数值做特殊限定，本领域技术人员可依据实际情况对数值进行设定。
本场景的随机接入方法中，终端可根据门限值信息和信道测量信息，在第一类型的上行载波和第二类型的上行载波中选择目标载波，可提高随机接入资源选择的灵活性。
以上介绍了初始选择目标载波的场景，下面将进一步结合附图和示例对目标载波变更场景做进一步说明。
场景二、目标载波变更。
如图4所示，该随机接入方法包括以下步骤：
步骤41：在随机接入消息对应的随机接入过程未完成的情况下，若满足预设变更条件，则变更目标载波。
这里所说的随机接入过程未完成可以是：终端触发了随机接入过程，但 随机接入未完成。本公开实施例中预设变更条件与信道质量相关，也就是说终端在确定当前目标载波的信道质量较差时，可变更目标载波，例如将目标载波由第一类型的上行载波变更为第二类型的上行载波；或者，将目标载波由第二类型的上行载波变更为第一类型的上行载波。
步骤42：通过目标载波，发送随机接入请求消息。
通过变更后的目标载波发送随机接入请求消息，可提高随机接入的成功率，减少随机接入时延。这里所说的随机接入请求消息可以是4步随机接入过程中的Msg1，也可以是2步随机接入过程中的Msg1或MsgA。
本公开实施例中以当前目标载波为第一类型的上行载波为例作为示例性说明。也就是说，在目标载波为第一类型的上行载波的情况下，步骤41可通过但不限于以下方式实现：若满足预设变更条件，则将目标载波由第一类型的上行载波变更为第二类型的上行载波。其中，预设变更条件包括以下至少一项：随机接入过程对应的定时器超时；随机接入过程对应的计数器等于第四门限值；第一类型的上行载波相关的第一信道测量信息中的参数项大于或等于第二门限值；以及与第二类型的上行载波相关的第二信道测量信息中的参数项小于第三门限值。
具体地，预设变更条件包括但不限于以下中的一种：
1、随机接入过程对应的定时器超时。
在目标载波为第一类型的上行载波的情况下，若随机接入过程对应的定时器超时，则将目标载波由第一类型的上行载波变更为第二类型的上行载波。进一步地，若随机接入过程对应的定时器超时，则将目标载波由第一类型的上行载波变更为第二类型的上行载波的步骤之前，还包括：在完成初始的目标载波选择或完成上一次目标载波变更时，启动随机接入过程对应的定时器。
以第一类型的上行载波为工作在非授权频段上的上行载波，第二类型的上行载波为SUL载波为例，在执行随机接入中，终端在随机接入初始化中选择了非授权频段上的上行载波后，启动一个定时器(timer)，如果该随机接入过程未完成且定时器超时，终端将目标载波更改/变换成SUL载波再进行下一次随机接入尝试。具体地，服务小区至少配置一个工作在非授权频段的上行载波、一个工作在授权频段或者非授权频段的SUL载波；终端发起的随机 接入过程可能是基于竞争的4步随机接入过程，也可能是基于竞争的2步随机接入过程，还可能是基于非竞争的随机接入过程。如果终端选择了非授权频段上的上行载波进行随机接入过程，则启动第一定时器(timer)；如果该随机过程没有完成且第一定时器超时了，这时终端切换到SUL载波上以进行(随后的)随机接入过程。其中，网络设备配置的P CMAX等于SUL载波的P CMAX,f,c。其中，第一定时器的启动时长可以由网络设备侧通过广播消息进行配置。
2、随机接入过程对应的计数器等于第四门限值；
在目标载波为第一类型的上行载波的情况下，若随机接入过程对应的计数器等于第四门限值，则将目标载波由第一类型的上行载波变更为第二类型的上行载波。进一步地，若随机接入过程对应的计数器等于第四门限值，则将目标载波由第一类型的上行载波变更为第二类型的上行载波的步骤之前，还包括：在完成初始的目标载波选择或完成上一次目标载波变更之后，设置随机接入过程对应的计数器。其中，设置计数器包括初始化计数器或重置计数器，例如在完成初始的目标载波选择之后，初始化随机接入过程对应的计数器；在完成上一次目标载波变更之后，重置随机接入过程对应的计数器。
以第一类型的上行载波为非授权频段上的上行载波，第二类型的上行载波为SUL载波为例，在执行随机接入中，终端在随机接入初始化中选择了非授权频段上的上行载波后，如果该随机接入过程未完成且终端媒体访问介质(Medium Access Control，MAC)层的一个计数器等于第四门限值时，终端将目标载波更改/变换成SUL载波再进行下一次随机接入尝试。具体地，服务小区至少配置一个工作在非授权频段的上行载波、一个工作在授权频段或者非授权频段的SUL载波；终端发起的随机接入过程可能是基于竞争的4步随机接入过程，也可能是基于竞争的2步随机接入过程，还可能是基于非竞争的随机接入过程。如果终端选择了非授权频段上的上行载波进行随机接入过程，则设置第一计数器，如果该随机过程没有完成，终端选择了非授权频段上的上行载波继续随机接入过程而且第一计数器等于第四门限值，则终端切换到SUL载波上以进行(随后的)随机接入过程。其中，网络设备配置的P CMAX等于SUL载波的P CMAX,f,c。计数器对应的第四门限值可以由网络设备侧通过 广播消息进行配置。
3、与第一类型的上行载波相关的第一信道测量信息中的参数项大于或等于第二门限值；
4、与第二类型的上行载波相关的第二信道测量信息中的参数项小于第三门限值。
其中，在步骤41之前还包括：获取门限值信息和信道测量信息；其中，信道测量信息包括：第一信道测量信息和第二信道测量信息中的至少一项。门限值信息包括但不限于：信道测量信息中各参数项对应的门限值，如第一门限值、第二门限值、第三门限值和第四门限值等。进一步地，门限值信息和信道测量信息可以通过不同方式或不同流程获取得到，例如门限值信息是通过网络设备广播的系统消息获取到的，信道测量信息是终端根据测量配置进行测量得到的。值得指出的是，门限值信息的获取过程与信道测量信息的获取过程没有严格的时序过程，可以先获取门限值信息再获取信道测量信息，也可以先获取信道测量信息再获取门限值信息，还可以同时获取信道测量信息和门限值信息。
进一步地，信道测量信息中的参数项包括：参考信号接收质量RSRQ、接收信号强度指示RSSI、信道繁忙率CBR和信道占用率CR中的至少一项。对于信道测量信息中的参数项，本实施例中的预设变更条件可以是信道测量信息中RSRQ、RSSI、CBR和CR中的任何组合与对应门限值之间的条件。另外值得指出的是，本公开实施例中不对上述第一门限值、第二门限值和第三门限值的具体数值做特殊限定，本领域技术人员可依据实际情况对数值进行设定。
以上1～4为预设变更条件为单独条件的示例，以下5～15是预设条件为组合条件的示例：
5、随机接入过程对应的定时器超时，且随机接入过程对应的计数器等于第四门限值。
6、随机接入过程对应的定时器超时，且与第一类型的上行载波相关的第一信道测量信息中的参数项大于或等于第二门限值。
7、随机接入过程对应的定时器超时，且与第二类型的上行载波相关的第 二信道测量信息中的参数项小于第三门限值。
8、随机接入过程对应的定时器超时，随机接入过程对应的计数器等于第四门限值，且与第一类型的上行载波相关的第一信道测量信息中的参数项大于或等于第二门限值。
9、随机接入过程对应的定时器超时，随机接入过程对应的计数器等于第四门限值，且与第二类型的上行载波相关的第二信道测量信息中的参数项小于第三门限值。
10、随机接入过程对应的定时器超时，与第一类型的上行载波相关的第一信道测量信息中的参数项大于或等于第二门限值，且与第二类型的上行载波相关的第二信道测量信息中的参数项小于第三门限值。
11、随机接入过程对应的定时器超时，随机接入过程对应的计数器等于第四门限值，与第一类型的上行载波相关的第一信道测量信息中的参数项大于或等于第二门限值，且与第二类型的上行载波相关的第二信道测量信息中的参数项小于第三门限值。
12、随机接入过程对应的计数器等于第四门限值，且与第一类型的上行载波相关的第一信道测量信息中的参数项大于或等于第二门限值。
13、随机接入过程对应的计数器等于第四门限值，且与第二类型的上行载波相关的第二信道测量信息中的参数项小于第三门限值。
14、随机接入过程对应的计数器等于第四门限值，与第一类型的上行载波相关的第一信道测量信息中的参数项大于或等于第二门限值，且与第二类型的上行载波相关的第二信道测量信息中的参数项小于第三门限值。
15、与第一类型的上行载波相关的第一信道测量信息中的参数项大于或等于第二门限值，且与第二类型的上行载波相关的第二信道测量信息中的参数项小于第三门限值。
进一步地，值得指出的是，本公开实施例中的计数器用于记录以下信息中的至少一项：
随机接入过程中随机接入请求消息的发送次数，随机接入请求消息包括但不限于Msg1或MsgA，其中Msg1或MsgA中携带有前导码，该计数器用于记录Msg1的发送次数，或记录MsgA的发送次数，例如该计数器可以是 前导码发送计数器(Preamble transmission counter)或MsgA发送计数器(MsgA transmission counter)；
随机接入过程中功率爬升次数，例如该计数器可以是功率爬升计数器(power ramping counter)；以及
随机接入过程中信道侦听失败次数，例如该计数器可以是先听后说失败计数器(LBT failure counter)。
该场景中，终端可在随机接入未完成时变更目标载波，提高随机接入的成功率，减少随机接入时延。
值得指出的是，以上场景一和场景二的实施方式可单独实施，亦可组合实施，本公开实施例对此并不做具体限定。另外，本公开实施例仅以第一类型的上行载波可以是工作在非授权频段上的上行载波，第二类型的上行载波可以是SUL载波为例对场景一和场景二进行说明，第一类型的上行载波和第二类型的上行载波均为工作在非授权频段上的上行载波，且第一类型的上行载波的频率高于第二类型的上行载波的频率的情况；或者，第一类型的上行载波为NUL载波，第二类型的上行载波为工作非授权频段上的上行载波，且NUL载波的频率高于第二类型的上行载波的情况，均可采用上述场景一和场景二的实施方式实现。
本公开实施例的随机接入方法中，终端可在第一类型的上行载波和第二类型的上行载波中选择可提高随机接入资源选择的灵活性，另外还可在随机接入未完成时变更目标载波，提高随机接入的成功率，减少随机接入时延。
以上实施例分别详细介绍了不同场景下的随机接入方法，下面本实施例将结合附图对其对应的终端做进一步介绍。
如图5所示，本公开实施例的终端500，能实现上述实施例中通过目标载波，发送随机接入请求消息；其中，目标载波为第一类型的上行载波和第二类型的上行载波中的一个方法的细节，并达到相同的效果，该终端500具体包括以下功能模块：
发送模块510，用于通过目标载波，发送随机接入请求消息；其中，目标载波为第一类型的上行载波和第二类型的上行载波中的一个。
其中，如图6所示，终端500还包括：
第一获取模块520，用于获取门限值信息和信道测量信息；其中，信道测量信息包括：与第一类型的上行载波相关的第一信道测量信息，以及与第二类型的上行载波相关的第二信道测量信息中的至少一项；
选择模块530，用于根据门限值信息和信道测量信息，在第一类型的上行载波和第二类型的上行载波中选择一个作为目标载波。
其中，选择模块包括：
第一选择子模块，用于在门限值信息和信道测量信息满足第一预设条件的情况下，将第二类型的上行载波确定为目标载波；其中，第一预设条件包括以下至少一项：
目标下行载波的路损参考信号的质量参数信息指示的信道质量小于第一门限值，其中，目标下行载波与第一类型的上行载波对应，或者，目标下行载波与第二类型的上行载波对应；
第一信道测量信息中的参数项大于或等于第二门限值；
第二信道测量信息中的参数项小于第三门限值。
其中，质量参数信息包括：参考信号接收功率RSRP、参考信号接收质量RSRQ、接收信号强度指示RSSI以及信号与干扰加噪声比SINR中的至少一项。
其中，如图7所示，终端500还包括：
变更模块540，用于在随机接入消息对应的随机接入过程未完成的情况下，若满足预设变更条件，则变更目标载波。
其中，变更模块540包括：
变更子模块，用于在目标载波为第一类型的上行载波的情况下，若满足预设变更条件，则将目标载波由第一类型的上行载波变更为第二类型的上行载波；其中，预设变更条件包括以下至少一项：
随机接入过程对应的定时器超时；
与第一类型的上行载波相关的第一信道测量信息中的参数项大于或等于第二门限值；
与第二类型的上行载波相关的第二信道测量信息中的参数项小于第三门限值；
随机接入过程对应的计数器等于第四门限值。
其中，终端500还包括：
启动模块，用于在完成初始的目标载波选择或完成上一次目标载波变更之后，启动随机接入过程对应的定时器；
设置模块，用于在完成初始的目标载波选择或完成上一次目标载波变更之后，设置随机接入过程对应的计数器；
第二获取模块，用于获取门限值信息和信道测量信息；其中，信道测量信息包括：第一信道测量信息和第二信道测量信息中的至少一项。
其中，计数器用于记录以下信息中的至少一项：
随机接入过程中随机接入请求消息的发送次数；
随机接入过程中功率爬升次数；以及
随机接入过程中信道侦听失败次数。
其中，上述参数项包括：参考信号接收质量RSRQ、接收信号强度指示RSSI、信道繁忙率CBR和信道占用率CR中的至少一项。
其中，第一类型的上行载波为标准上行NUL载波，第二类型的上行载波为补充上行SUL载波。
值得指出的是，本公开实施例的终端可在第一类型的上行载波和第二类型的上行载波中选择可提高随机接入请求消息的资源选择灵活性，另外还可在随机接入未完成时变更目标载波，提高随机接入的成功率，减少随机接入时延。
需要说明的是，应理解以上终端的各个模块的划分仅仅是一种逻辑功能的划分，实际实现时可以全部或部分集成到一个物理实体上，也可以物理上分开。且这些模块可以全部以软件通过处理元件调用的形式实现；也可以全部以硬件的形式实现；还可以部分模块通过处理元件调用软件的形式实现，部分模块通过硬件的形式实现。例如，确定模块可以为单独设立的处理元件，也可以集成在上述装置的某一个芯片中实现，此外，也可以以程序代码的形式存储于上述装置的存储器中，由上述装置的某一个处理元件调用并执行以上确定模块的功能。其它模块的实现与之类似。此外这些模块全部或部分可以集成在一起，也可以独立实现。这里所述的处理元件可以是一种集成电路， 具有信号的处理能力。在实现过程中，上述方法的各步骤或以上各个模块可以通过处理器元件中的硬件的集成逻辑电路或者软件形式的指令完成。
例如，以上这些模块可以是被配置成实施以上方法的一个或多个集成电路，例如：一个或多个特定集成电路(Application Specific Integrated Circuit，ASIC)，或，一个或多个微处理器(digital signal processor，DSP)，或，一个或者多个现场可编程门阵列(Field Programmable Gate Array，FPGA)等。再如，当以上某个模块通过处理元件调度程序代码的形式实现时，该处理元件可以是通用处理器，例如中央处理器(Central Processing Unit，CPU)或其它可以调用程序代码的处理器。再如，这些模块可以集成在一起，以片上系统(system-on-a-chip，SOC)的形式实现。
为了更好的实现上述目的，进一步地，图8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80包括但不限于：射频单元81、网络模块82、音频输出单元83、输入单元84、传感器85、显示单元86、用户输入单元87、接口单元88、存储器89、处理器810、以及电源811等部件。本领域技术人员可以理解，图8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。
其中，射频单元81，用于通过目标载波，发送随机接入请求消息；其中，目标载波为第一类型的上行载波和第二类型的上行载波中的一个；
处理器810，用于控制射频单元81收发数据；
本公开实施例的终端可在第一类型的上行载波和第二类型的上行载波中选择可提高随机接入资源选择的灵活性，另外还可在随机接入未完成时变更目标载波，提高随机接入的成功率，减少随机接入时延。
应理解的是，本公开实施例中，射频单元81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810处理；另外，将上行的数据发送给基站。通常，射频单元81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81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82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83可以将射频单元81或网络模块82接收的或者在存储器89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83还可以提供与终端80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83包括扬声器、蜂鸣器以及受话器等。
输入单元84用于接收音频或视频信号。输入单元84可以包括图形处理器(Graphics Processing Unit，GPU)841和麦克风842，图形处理器841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86上。经图形处理器841处理后的图像帧可以存储在存储器89(或其它存储介质)中或者经由射频单元81或网络模块82进行发送。麦克风842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81发送到移动通信基站的格式输出。
终端80还包括至少一种传感器85，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861的亮度，接近传感器可在终端80移动到耳边时，关闭显示面板861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85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86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86可包括显示面板861，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861。
用户输入单元87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87包括触控面板871以及其他输入设备872。触控面板871，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871上或在触控面板871附近的操作)。触控面板871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810，接收处理器810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871。除了触控面板871，用户输入单元87还可以包括其他输入设备872。具体地，其他输入设备872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871可覆盖在显示面板861上，当触控面板871检测到在其上或附近的触摸操作后，传送给处理器810以确定触摸事件的类型，随后处理器810根据触摸事件的类型在显示面板861上提供相应的视觉输出。虽然在图8中，触控面板871与显示面板861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871与显示面板861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88为外部装置与终端80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88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80内的一个或多个元件或者可以用于在终端80和外部装置之间传输数据。
存储器89可用于存储软件程序以及各种数据。存储器89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89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810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89内的软件程序和/或模块，以及调用存储在存储器89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810可包括一个或多个处理单元；可选的，处理器810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810中。
终端80还可以包括给各个部件供电的电源811(比如电池)，可选的，电源811可以通过电源管理系统与处理器810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80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810，存储器89，存储在存储器89上并可在所述处理器810上运行的计算机程序，该计算机程序被处理器810执行时实现上述随机接入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，终端可以是无线终端也可以是有线终端，无线终端可以是指向用户提供语音和/或其他业务数据连通性的设备，具有无线连接功能的手持式设备、或连接到无线调制解调器的其他处理设备。无线终端可以经无线接入网(Radio Access Network，RAN)与一个或多个核心网进行通信，无线终端可以是移动终端，如移动电话(或称为“蜂窝”电话)和具有移动终端的计算机，例如，可以是便携式、袖珍式、手持式、计算机内置的或者车载的移动装置，它们与无线接入网交换语言和/或数据。例如，个人通信业务(Personal Communication Service，PCS)电话、无绳电话、会话发起协议(Session Initiation Protocol，SIP)话机、无线本地环路(Wireless Local Loop，WLL)站、个人数字助理(Personal Digital Assistant，PDA)等设备。无线终端也可以称为系统、订户单元(Subscriber Unit)、订户站(Subscriber Station)，移动站(Mobile Station)、移动台(Mobile)、远程站(Remote Station)、远程终端(Remote Terminal)、接入终端(Access Terminal)、用户终端(User Terminal)、用户代理(User Agent)、用户设备(User Device  or User Equipment)，在此不作限定。
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，该计算机程序被处理器执行时实现上述随机接入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。
本领域普通技术人员可以意识到，结合本文中所公开的实施例描述的各示例的单元及算法步骤，能够以电子硬件、或者计算机软件和电子硬件的结合来实现。这些功能究竟以硬件还是软件方式来执行，取决于技术方案的特定应用和设计约束条件。专业技术人员可以对每个特定的应用来使用不同方法来实现所描述的功能，但是这种实现不应认为超出本公开的范围。
所属领域的技术人员可以清楚地了解到，为描述的方便和简洁，上述描述的系统、装置和单元的具体工作过程，可以参考前述方法实施例中的对应过程，在此不再赘述。
在本申请所提供的实施例中，应该理解到，所揭露的装置和方法，可以通过其它的方式实现。例如，以上所描述的装置实施例仅仅是示意性的，例如，所述单元的划分，仅仅为一种逻辑功能划分，实际实现时可以有另外的划分方式，例如多个单元或组件可以结合或者可以集成到另一个系统，或一些特征可以忽略，或不执行。另一点，所显示或讨论的相互之间的耦合或直接耦合或通信连接可以是通过一些接口，装置或单元的间接耦合或通信连接，可以是电性，机械或其它的形式。
所述作为分离部件说明的单元可以是或者也可以不是物理上分开的，作为单元显示的部件可以是或者也可以不是物理单元，即可以位于一个地方，或者也可以分布到多个网络单元上。可以根据实际的需要选择其中的部分或者全部单元来实现本实施例方案的目的。
另外，在本公开各个实施例中的各功能单元可以集成在一个处理单元中，也可以是各个单元单独物理存在，也可以两个或两个以上单元集成在一个单元中。
所述功能如果以软件功能单元的形式实现并作为独立的产品销售或使用 时，可以存储在一个计算机可读取存储介质中。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或者该技术方案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中，包括若干指令用以使得一台计算机设备(可以是个人计算机，服务器，或者网络设备等)执行本公开各个实施例所述方法的全部或部分步骤。而前述的存储介质包括：U盘、移动硬盘、ROM、RAM、磁碟或者光盘等各种可以存储程序代码的介质。
此外，需要指出的是，在本公开的装置和方法中，显然，各部件或各步骤是可以分解和/或重新组合的。这些分解和/或重新组合应视为本公开的等效方案。并且，执行上述系列处理的步骤可以自然地按照说明的顺序按时间顺序执行，但是并不需要一定按照时间顺序执行，某些步骤可以并行或彼此独立地执行。对本领域的普通技术人员而言，能够理解本公开的方法和装置的全部或者任何步骤或者部件，可以在任何计算装置(包括处理器、存储介质等)或者计算装置的网络中，以硬件、固件、软件或者它们的组合加以实现，这是本领域普通技术人员在阅读了本公开的说明的情况下运用他们的基本编程技能就能实现的。
因此，本公开的目的还可以通过在任何计算装置上运行一个程序或者一组程序来实现。所述计算装置可以是公知的通用装置。因此，本公开的目的也可以仅仅通过提供包含实现所述方法或者装置的程序代码的程序产品来实现。也就是说，这样的程序产品也构成本公开，并且存储有这样的程序产品的存储介质也构成本公开。显然，所述存储介质可以是任何公知的存储介质或者将来所开发出来的任何存储介质。还需要指出的是，在本公开的装置和方法中，显然，各部件或各步骤是可以分解和/或重新组合的。这些分解和/或重新组合应视为本公开的等效方案。并且，执行上述系列处理的步骤可以自然地按照说明的顺序按时间顺序执行，但是并不需要一定按照时间顺序执行。某些步骤可以并行或彼此独立地执行。
以上所述的是本公开的可选实施方式，应当指出对于本技术领域的普通人员来说，在不脱离本公开所述的原理前提下还可以作出若干改进和润饰，这些改进和润饰也在本公开的保护范围内。

Claims (22)

  1. 一种随机接入方法，应用于终端侧，包括：
    通过目标载波，发送随机接入请求消息；其中，所述目标载波为第一类型的上行载波和第二类型的上行载波中的一个。
  2. 根据权利要求1所述的随机接入方法，其中，通过目标载波，发送随机接入请求消息的步骤之前，还包括：
    获取门限值信息和信道测量信息；其中，所述信道测量信息包括：与所述第一类型的上行载波相关的第一信道测量信息，以及与所述第二类型的上行载波相关的第二信道测量信息中的至少一项；
    根据所述门限值信息和所述信道测量信息，在所述第一类型的上行载波和所述第二类型的上行载波中选择一个作为所述目标载波。
  3. 根据权利要求2所述的随机接入方法，其中，根据所述门限值信息和所述信道测量信息，在所述第一类型的上行载波和所述第二类型的上行载波中选择一个作为所述目标载波的步骤，包括：
    在所述门限值信息和所述信道测量信息满足第一预设条件的情况下，将所述第二类型的上行载波确定为所述目标载波；其中，所述第一预设条件包括以下至少一项：
    目标下行载波的路损参考信号的质量参数信息指示的信道质量小于第一门限值，其中，所述目标下行载波与所述第一类型的上行载波对应，或者，所述目标下行载波与所述第二类型的上行载波对应；
    所述第一信道测量信息中的参数项大于或等于第二门限值；
    所述第二信道测量信息中的参数项小于第三门限值。
  4. 根据权利要求3所述的随机接入方法，其中，所述质量参数信息包括：参考信号接收功率RSRP、参考信号接收质量RSRQ、接收信号强度指示RSSI以及信号与干扰加噪声比SINR中的至少一项。
  5. 根据权利要求1所述的随机接入方法，其中，通过目标载波，发送随机接入请求消息的步骤之前，还包括：
    在所述随机接入消息对应的随机接入过程未完成的情况下，若满足预设 变更条件，则变更所述目标载波。
  6. 根据权利要求5所述的随机接入方法，其中，若满足预设变更条件，则变更所述目标载波的步骤，包括：
    在所述目标载波为第一类型的上行载波的情况下，若满足预设变更条件，则将所述目标载波由所述第一类型的上行载波变更为所述第二类型的上行载波；其中，所述预设变更条件包括以下至少一项：
    所述随机接入过程对应的定时器超时；
    与所述第一类型的上行载波相关的第一信道测量信息中的参数项大于或等于第二门限值；
    与所述第二类型的上行载波相关的第二信道测量信息中的参数项小于第三门限值；
    所述随机接入过程对应的计数器等于第四门限值。
  7. 根据权利要求6所述的随机接入方法，其中，若满足预设变更条件，则将所述目标载波变更为所述第二类型的上行载波的步骤之前，还包括以下中的至少一项：
    在完成初始的目标载波选择或完成上一次目标载波变更之后，启动所述随机接入过程对应的定时器；
    在完成初始的目标载波选择或完成上一次目标载波变更之后，设置所述随机接入过程对应的计数器；
    获取门限值信息和信道测量信息；其中，所述信道测量信息包括：所述第一信道测量信息和所述第二信道测量信息中的至少一项。
  8. 根据权利要求6所述的随机接入方法，其中，所述计数器用于记录以下信息中的至少一项：
    所述随机接入过程中随机接入请求消息的发送次数；
    所述随机接入过程中功率爬升次数；以及
    所述随机接入过程中信道侦听失败次数。
  9. 根据权利要求3或6所述的随机接入方法，其中，所述参数项包括：参考信号接收质量RSRQ、接收信号强度指示RSSI、信道繁忙率CBR和信道占用率CR中的至少一项。
  10. 根据权利要求1所述的随机接入方法，其中，所述第一类型的上行载波为标准上行NUL载波，所述第二类型的上行载波为补充上行SUL载波。
  11. 一种终端，包括：
    发送模块，用于通过目标载波，发送随机接入请求消息；其中，所述目标载波为第一类型的上行载波和第二类型的上行载波中的一个。
  12. 根据权利要求11所述的终端，还包括：
    第一获取模块，用于获取门限值信息和信道测量信息；其中，所述信道测量信息包括：与所述第一类型的上行载波相关的第一信道测量信息，以及与所述第二类型的上行载波相关的第二信道测量信息中的至少一项；
    选择模块，用于根据所述门限值信息和所述信道测量信息，在所述第一类型的上行载波和所述第二类型的上行载波中选择一个作为所述目标载波。
  13. 根据权利要求12所述的终端，其中，所述选择模块包括：
    第一选择子模块，用于在所述门限值信息和所述信道测量信息满足第一预设条件的情况下，将所述第二类型的上行载波确定为所述目标载波；其中，所述第一预设条件包括以下至少一项：
    目标下行载波的路损参考信号的质量参数信息指示的信道质量小于第一门限值，其中，所述目标下行载波与所述第一类型的上行载波对应，或者，所述目标下行载波与所述第二类型的上行载波对应；
    所述第一信道测量信息中的参数项大于或等于第二门限值；
    所述第二信道测量信息中的参数项小于第三门限值。
  14. 根据权利要求13所述的终端，其中，所述质量参数信息包括：参考信号接收功率RSRP、参考信号接收质量RSRQ、接收信号强度指示RSSI以及信号与干扰加噪声比SINR中的至少一项。
  15. 根据权利要求11所述的终端，还包括：
    变更模块，用于在所述随机接入消息对应的随机接入过程未完成的情况下，若满足预设变更条件，则变更所述目标载波。
  16. 根据权利要求15所述的终端，其中，所述变更模块包括：
    变更子模块，用于在所述目标载波为第一类型的上行载波的情况下，若满足预设变更，则将所述目标载波由所述第一类型的上行载波变更为所述第 二类型的上行载波；其中，所述预设变更条件包括以下至少一项：
    所述随机接入过程对应的定时器超时；
    与所述第一类型的上行载波相关的第一信道测量信息中的参数项大于或等于第二门限值；
    与所述第二类型的上行载波相关的第二信道测量信息中的参数项小于第三门限值；
    所述随机接入过程对应的计数器等于第四门限值。
  17. 根据权利要求16所述的终端，还包括：
    启动模块，用于在完成初始的目标载波选择或完成上一次目标载波变更之后，启动所述随机接入过程对应的定时器；
    设置模块，用于在完成初始的目标载波选择或完成上一次目标载波变更之后，设置所述随机接入过程对应的计数器；
    第二获取模块，用于获取门限值信息和信道测量信息；其中，所述信道测量信息包括：所述第一信道测量信息和所述第二信道测量信息中的至少一项。
  18. 根据权利要求16所述的终端，其中，所述计数器用于记录以下信息中的至少一项：
    所述随机接入过程中随机接入请求消息的发送次数；
    所述随机接入过程中功率爬升次数；以及
    所述随机接入过程中信道侦听失败次数。
  19. 根据权利要求13或16所述的终端，其中，所述参数项包括：参考信号接收质量RSRQ、接收信号强度指示RSSI、信道繁忙率CBR和信道占用率CR中的至少一项。
  20. 根据权利要求11所述的终端，其中，所述第一类型的上行载波为标准上行NUL载波，所述第二类型的上行载波为补充上行SUL载波。
  21. 一种终端，所述终端包括处理器、存储器以及存储于所述存储器上并在所述处理器上运行的计算机程序，所述计算机程序被所述处理器执行时实现如权利要求1至10中任一项所述的随机接入方法的步骤。
  22. 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如权利要求1至10中任一项所述的随机接入方法的步骤。
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