WO2019161754A1 - 随机接入方法、终端及网络设备 - Google Patents

随机接入方法、终端及网络设备 Download PDF

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Publication number
WO2019161754A1
WO2019161754A1 PCT/CN2019/075258 CN2019075258W WO2019161754A1 WO 2019161754 A1 WO2019161754 A1 WO 2019161754A1 CN 2019075258 W CN2019075258 W CN 2019075258W WO 2019161754 A1 WO2019161754 A1 WO 2019161754A1
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Prior art keywords
random access
access resource
terminal
information
indication information
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PCT/CN2019/075258
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English (en)
French (fr)
Inventor
张向东
常俊仁
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华为技术有限公司
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Publication of WO2019161754A1 publication Critical patent/WO2019161754A1/zh

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/20—Control channels or signalling for resource management
    • H04W72/23—Control channels or signalling for resource management in the downlink direction of a wireless link, i.e. towards a terminal
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/50—Allocation or scheduling criteria for wireless resources
    • H04W72/52—Allocation or scheduling criteria for wireless resources based on load
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W74/00—Wireless channel access
    • H04W74/08—Non-scheduled access, e.g. ALOHA
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W74/00—Wireless channel access
    • H04W74/08—Non-scheduled access, e.g. ALOHA
    • H04W74/0833—Random access procedures, e.g. with 4-step access
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W74/00—Wireless channel access
    • H04W74/08—Non-scheduled access, e.g. ALOHA
    • H04W74/0833—Random access procedures, e.g. with 4-step access
    • H04W74/0841—Random access procedures, e.g. with 4-step access with collision treatment
    • H04W74/085—Random access procedures, e.g. with 4-step access with collision treatment collision avoidance
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W74/00—Wireless channel access
    • H04W74/08—Non-scheduled access, e.g. ALOHA
    • H04W74/0866—Non-scheduled access, e.g. ALOHA using a dedicated channel for access

Definitions

  • the present application relates to the field of wireless communications, and in particular, to a random access method, a terminal, and a network device.
  • a fifth-generation (5G) communication system uses a higher carrier frequency than Long Term Evolution (LTE), and generally uses a carrier frequency greater than 6 gigahertz (GHz), such as 28 GHz, 38 GHz, or The 60 GHz band, etc., to achieve wireless communication with greater bandwidth and higher transmission rate. Due to the high carrier frequency, the wireless signal it transmits undergoes more severe fading during spatial propagation, and it is difficult to detect the wireless signal even at the receiving end. To this end, beamforming (BF) technology is used in the 5G communication system to obtain a beam with good directivity to improve the power in the transmitting direction and improve the signal to interference ratio (Signal to Interference plus Noise Ratio) at the receiving end. SINR). The Beam Sweeping process is used in the 5G New Radio (NR) to determine the beam pair between the Transmission Reception Point (TRP) and the terminal.
  • GHz gigahertz
  • SINR Signal to Interference plus Noise Ratio
  • Each downlink beam base station sends a Synchronization Signal Block (SSB), including a primary and secondary synchronization signal and a Physical Broadcast Channel (PBCH), for the terminal to acquire downlink synchronization and necessary system information.
  • SSB Synchronization Signal Block
  • PBCH Physical Broadcast Channel
  • the base station configures the correspondence between one or more SSB slots and the random access resources through the system message, so that the terminal can learn the SSB after completing the downlink beam selection based on the SSB.
  • a random access resource initiates random access to the network.
  • the application provides a random access method, a terminal, and a network device to reduce the delay in the random access process.
  • the application provides a random access method, including:
  • the terminal selects a target random access resource according to the indication information
  • the terminal initiates a random access procedure by using the target random access resource.
  • the indication information includes: identifier information of a random access resource whose load satisfies a low load condition, and/or identifier information of a random access resource whose load satisfies a high load condition.
  • the identifier information is one or more of the following: a random access resource subset information, a preamble identifier subset information, a beam identifier, and a synchronization signal block identifier.
  • the indication information includes: when the identifier of the random access resource that satisfies the low load condition is loaded,
  • the terminal selects a target random access resource according to the indication information, and includes:
  • the terminal selects the target random access resource in a random access resource whose load satisfies a low load condition.
  • the indication information includes: when the identifier of the random access resource that satisfies the high load condition is loaded,
  • the terminal selects a target random access resource according to the indication information, and includes:
  • the terminal selects the target random access resource in a random access resource other than the random access resource whose load satisfies a high load condition.
  • the identification information includes a beam identification
  • the terminal Before the terminal selects the target random access resource according to the indication information, the terminal further includes:
  • the terminal selects a target random access resource according to the indication information, and includes:
  • the identification information includes a synchronization signal block identifier
  • the terminal selects a target random access resource according to the indication information, and includes:
  • the terminal before the terminal selects the target random access resource according to the indication information, the terminal further includes:
  • the terminal determines to change the current random access resource when the backoff information meets the preset condition.
  • determining, by the terminal, that the current random access resource is changed including:
  • the terminal determines to change the current random access resource when the backoff information is greater than the first preset threshold.
  • determining, by the terminal, that the current random access resource is changed including:
  • the terminal generates a backoff variable according to the backoff information
  • the terminal determines to change the current random access resource when the backoff variable is greater than the second preset threshold.
  • the application provides a random access method, including:
  • the terminal receives the backoff information sent by the network device
  • determining, by the terminal, that the current random access resource is changed including:
  • the terminal determines to change the current random access resource when the backoff information is greater than the first preset threshold.
  • determining, by the terminal, that the current random access resource is changed including:
  • the terminal generates a backoff variable according to the backoff information
  • the terminal determines to change the current random access resource when the backoff variable is greater than the second preset threshold.
  • the method further includes:
  • the terminal receives the indication information sent by the network device, where the indication information is used to indicate load information of the random access resource.
  • the indication information includes: identifier information of a random access resource whose load satisfies a low load condition, and/or identifier information of a random access resource whose load satisfies a high load condition.
  • the terminal can select the target random access resource by combining the load condition of the random access resource.
  • the identifier information is one or more of the following: a random access resource subset information, a preamble identifier subset information, a beam identifier, and a synchronization signal block identifier.
  • the terminal after determining that the current random access resource is changed, the terminal determines to change the current random access resource according to the backoff information.
  • the terminal selects a target random access resource according to the indication information
  • the terminal initiates a random access procedure by using the target random access resource.
  • the indication information includes: when the identifier of the random access resource that satisfies the low load condition is loaded,
  • the terminal selects a target random access resource according to the indication information, and includes:
  • the terminal selects the target random access resource in a random access resource whose load satisfies a low load condition.
  • the indication information includes: when the identifier of the random access resource that satisfies the high load condition is loaded,
  • the terminal selects a target random access resource according to the indication information, and includes:
  • the terminal selects the target random access resource in a random access resource other than the random access resource whose load satisfies a high load condition.
  • the application provides a random access method, including:
  • the network device determines indication information, where the indication information is used to indicate load information of the candidate random access resource
  • the network device sends the indication information to the terminal.
  • the indication information includes: identifier information of a random access resource whose load satisfies a low load condition, and/or identifier information of a random access resource whose load satisfies a high load condition.
  • the identifier information is one or more of the following: a random access resource subset information, a preamble identifier subset information, a beam identifier, and a synchronization signal block identifier.
  • the method further includes:
  • the network device sends backoff information to the terminal.
  • the application provides a random access method, including:
  • the network device determines the backoff information
  • the network device sends the backoff information to the terminal.
  • the application provides a terminal, including:
  • a receiving module configured to receive indication information sent by the network device, where the indication information is used to indicate load information of the candidate random access resource;
  • a processing module configured to select a target random access resource according to the indication information, and initiate a random access procedure by using the target random access resource.
  • the indication information includes: identifier information of a random access resource whose load satisfies a low load condition, and/or identifier information of a random access resource whose load satisfies a high load condition.
  • the identifier information is one or more of the following: a random access resource subset information, a preamble identifier subset information, a beam identifier, and a synchronization signal block identifier.
  • the indication information includes: when the identifier of the random access resource that satisfies the low load condition is loaded,
  • the processing module is specifically configured to select the target random access resource in a random access resource in which the load meets a low load condition.
  • the indication information includes: when the identifier of the random access resource that satisfies the high load condition is loaded,
  • the processing module is specifically configured to select the target random access resource in a random access resource other than the random access resource in which the load satisfies a high load condition.
  • the receiving module is further configured to receive backoff information sent by the network device;
  • the processing module is configured to determine to change the current random access resource when the backoff information meets a preset condition.
  • the application provides a terminal, including:
  • a receiving module configured to receive backoff information sent by the network device
  • the processing module is configured to determine to change the current random access resource when the preset information is met according to the backoff information.
  • the processing module is specifically configured to determine to change the current random access resource when the backoff information is greater than the first preset threshold.
  • the processing module is configured to generate a backoff variable according to the backoff information, and determine to change the current random access resource when the backoff variable is greater than a second preset threshold.
  • the receiving module is further configured to receive indication information sent by the network device, where the indication information is used to indicate load information of the candidate random access resource.
  • the indication information includes: identifier information of a random access resource whose load satisfies a low load condition, and/or identifier information of a random access resource whose load satisfies a high load condition.
  • the application provides a network device, including:
  • a processing module configured to determine indication information, where the indication information is used to indicate load information of a candidate random access resource
  • a sending module configured to send the indication information to the terminal.
  • the indication information includes: identifier information of a random access resource whose load satisfies a low load condition, and/or identifier information of a random access resource whose load satisfies a high load condition.
  • the identifier information is one or more of the following: a random access resource subset information, a preamble identifier subset information, a beam identifier, and a synchronization signal block identifier.
  • the sending module is further configured to send backoff information to the terminal.
  • the application provides a network device, including:
  • a processing module configured to determine backoff information
  • a sending module configured to send the backoff information to the terminal.
  • the present application provides a random access device, the device comprising a processor and a memory, wherein the memory is used to store a program, and the processor calls a program stored in the memory to perform the first aspect or the second aspect of the present application.
  • a method is provided, and the device may be a terminal or a chip on the terminal.
  • the application provides a random access device, the device includes a processor and a memory, the memory is used to store a program, and the processor calls a program stored in the memory to perform the third aspect or the fourth aspect of the present application.
  • the device may be a network device or a chip on a network device.
  • a communication device including a processor, and an interface.
  • the processor performs the functions of the processing module in the fifth to eighth aspects.
  • the interface completes the functions of the receiving module/sending module in the fifth to eighth aspects.
  • the present application provides a computer storage medium for storing a program for performing any one of the methods of any one of the above first to fourth aspects.
  • the network device sends the indication information to the terminal, where the indication information is used to indicate the load information of the candidate random access resource, and the terminal selects the target random access resource according to the indication information.
  • the random access procedure is initiated by using the foregoing target random access resource, and the random access resource that initiates the random access procedure is selected according to the load condition of the candidate random access resource, so as to minimize the delay of the random access.
  • FIG. 1 is a schematic structural diagram of a communication system provided by the present application.
  • FIG. 2 is a schematic flowchart of a random access method according to an embodiment of the present application.
  • FIG. 3 is a schematic diagram of a beam number in an embodiment of the present application.
  • FIG. 5 is a schematic flowchart of a random access method according to another embodiment of the present disclosure.
  • FIG. 6 is a schematic structural diagram of a terminal according to an embodiment of the present disclosure.
  • FIG. 7 is a schematic structural diagram of a network device according to an embodiment of the present disclosure.
  • FIG. 8 is a schematic structural diagram of a terminal according to another embodiment of the present disclosure.
  • FIG. 9 is a schematic structural diagram of a terminal according to another embodiment of the present disclosure.
  • FIG. 10 is a schematic structural diagram of a terminal according to another embodiment of the present disclosure.
  • FIG. 11 is a schematic structural diagram of a network device according to another embodiment of the present disclosure.
  • FIG. 12 is a schematic structural diagram of a network device according to another embodiment of the present disclosure.
  • FIG. 13 is a schematic structural diagram of a network device according to another embodiment of the present disclosure.
  • the embodiments of the present application can be applied to a wireless communication system.
  • the wireless communication system mentioned in the embodiments of the present application includes but is not limited to: Narrow Band-Internet of Things (NB-IoT), global mobile Global System for Mobile Communications (GSM), Enhanced Data Rate for GSM Evolution (EDGE), Wideband Code Division Multiple Access (WCDMA), Code Division Multiple Access (CDMA) 2000 System (Code Division Multiple Access, CDMA2000), Time Division-Synchronization Code Division Multiple Access (TD-SCDMA), Long Term Evolution (LTE) and next-generation 5G mobile communication systems
  • NB-IoT Narrow Band-Internet of Things
  • GSM Global System for Mobile Communications
  • EDGE Enhanced Data Rate for GSM Evolution
  • WCDMA Wideband Code Division Multiple Access
  • CDMA Code Division Multiple Access
  • CDMA2000 Code Division Multiple Access 2000 System
  • TD-SCDMA Time Division-Synchronization Code Division Multiple Access
  • LTE Long Term Evolution
  • next-generation 5G mobile communication systems The three application scenarios are enhanced
  • FIG. 1 is a schematic structural diagram of a communication system provided by the present application.
  • the communication system 01 includes a network device 101 and a terminal 102.
  • the network device 101 can also be connected to the core network.
  • Network device 101 may also be in communication with an internet protocol (IP) network 200, such as the Internet, a private IP network, or other data network.
  • IP internet protocol
  • Network devices provide services to terminals within coverage.
  • network device 101 provides wireless access to one or more terminals within range of network device 101.
  • network devices can communicate with each other.
  • the terminal device 102 includes but is not limited to a mobile station (MS, Mobile Station), a mobile terminal, a mobile telephone, a handset, and a portable device.
  • the terminal can communicate with one or more core networks via a radio access network (RAN), for example, the terminal can be a mobile phone (or "cellular" phone), with wireless communication capabilities.
  • RAN radio access network
  • the terminal 102 can also be a portable, pocket-sized, handheld, computer-integrated or in-vehicle mobile device or device.
  • Network device 101 may be a device for communicating with terminal 102.
  • it may be a base transceiver station (BTS) in a GSM system or a CDMA system, or a base station (NodeB, NB) in a WCDMA system, or an evolved base station (eNB) in an LTE system.
  • BTS base transceiver station
  • NodeB, NB base station
  • eNB evolved base station
  • the network device may also be a relay station, an access point, an in-vehicle device, or the like.
  • D2D Device to Device
  • the network device may also be a terminal functioning as a base station.
  • the number and types of terminals included in the communication system 01 shown in FIG. 1 are merely exemplary, and the embodiment of the present application is not limited thereto.
  • it may also include more cellular terminals that communicate with network devices, or more D2D terminals that perform device-to-device D2D communication, which are not described in the drawings for the sake of brevity.
  • the communication system 01 may not be limited to include the network device and the terminal, and may also include a core network device or a device for carrying a virtualized network function, etc., which will be apparent to those skilled in the art. I will not elaborate on them here.
  • FIG. 2 is a schematic flowchart of a random access method according to an embodiment of the present disclosure. As shown in FIG. 2, the method includes:
  • the network device sends indication information to the terminal, where the indication information is used to indicate load information of the candidate random access resource.
  • the candidate random access resource may be a random access resource that is not currently used, or a random access resource that may be used in the future. Of course, not limited to this, it may also include random access resources that are not used in the future.
  • the load information of the candidate random access resource includes load information of one or more random access resources.
  • the indication information is sent to the terminal.
  • the terminal selects a target random access resource according to the foregoing indication information.
  • the terminal After receiving the indication information, the terminal selects the target random access resource according to the indication information.
  • the terminal initiates a random access process by using the target random access resource.
  • the terminal determines, by using the load information indicating the candidate random access resource indicated by the indication information, that the more suitable target random access resource initiates the random access procedure.
  • the random access resources include random access time-frequency resources and/or preambles.
  • the target random access resource includes a time-frequency resource and/or a sequence resource corresponding to a subset of random access time-frequency resources and/or a subset of preamble indices.
  • the batch access RACH resources may include: a Packet Random Access Channel (PRACH) configuration index, a speed identifier, a PRACH frequency domain offset, and the like. If it is an coverage enhancement scenario, the random access resource time-frequency subset (which may also include a repeated start subframe, a control channel repetition number, a frequency hopping mode, and the like).
  • PRACH Packet Random Access Channel
  • the random access resource time-frequency subset (which may also include a repeated start subframe, a control channel repetition number, a frequency hopping mode, and the like).
  • the initiating the random access procedure may be performed by the terminal transmitting, on the random access time-frequency resource in the target random access resource, a preamble corresponding to the preamble index subset in the target random access resource to the network device.
  • the random access preamble selected in the code may also use the foregoing target random access resource to send a random access request to the network device, and is not limited herein.
  • the initiating the random access procedure may be performed by the terminal transmitting, on the random access time-frequency resource in the target random access resource, a preamble corresponding to the preamble index subset in the target random access resource to the network device.
  • the random access preamble selected in the code may also use the foregoing target random access resource to send a random access request to the network device, and is not limited herein.
  • the terminal that is the execution subject in the present application is a terminal that satisfies the random access condition.
  • a terminal with a higher priority or lower priority in a random access procedure initiated in multiple terminals is a terminal that satisfies the random access condition.
  • the network device sends the indication information to the terminal, where the indication information is used to indicate the load information of the candidate random access resource, and the terminal selects the target random access resource according to the indication information, and uses the target random access resource to initiate the randomization.
  • the access process implements random access resources that initiate a random access procedure according to the load condition of the candidate random access resources, so as to minimize the delay of random access.
  • the indication information is used to indicate that the load satisfies a random access resource with a low load condition, and/or a random access resource whose load satisfies a high load condition.
  • the foregoing indication information includes: identifier information of a random access resource whose load satisfies a low load condition, and/or identifier information of a random access resource whose load satisfies a high load condition.
  • the indication information is used to indicate load information of the candidate random access resource, and may be a random access resource identifier indicating a random access resource or a load low load condition that satisfies a load low load condition, and/or The indication information indicates an identifier of a random access resource that satisfies a high load condition or a random access resource that bears a high load condition.
  • the network device may indicate a random access resource with a light load, and may also indicate a random access resource with a higher load.
  • the random access resource whose load meets the low load condition may refer to a random access resource whose load is lower than a preset threshold a. Alternatively, it may also refer to a random access resource with a lower load than other random access resources, for example, a total of M random access resources, and relatively low load N1 random access resources are considered to be load satisfied. Random access resources under low load conditions. M is an integer greater than 0, and N1 is an integer greater than 0 and less than or equal to M.
  • a random access resource whose load satisfies a high load condition may refer to a random access resource whose load is higher than a preset threshold b. Alternatively, it may also refer to a random access resource with a higher load than other random access resources, for example, a total of M random access resources, and relatively high load N2 random access resources are considered to be load satisfied. Random access resources under high load conditions. M is an integer greater than 0, and N2 is an integer greater than 0 and less than or equal to M.
  • the foregoing identifier information may be one or more of the following: a subset of RACH resources, a subset of preamble indices, a beam identifier, and a synchronization signal block (SSB) logo. That is, the load information of the corresponding random access resource is indicated by one or more of the information.
  • SSB synchronization signal block
  • the identification information of the random access resource indicating that the load satisfies the low load condition, and/or the identification information of the random access resource whose load satisfies the high load condition may be pre-defined or configured. Then, the identification information of the random access resource whose load satisfies the low load condition and/or the identification information of the random access resource whose load satisfies the high load condition are directly or indirectly indicated by the foregoing identification information.
  • the terminal may directly determine the corresponding random access resource.
  • the terminal may indirectly determine the corresponding random access resource.
  • the terminal may determine the SSB corresponding to the beam identifier according to the beam identifier before the terminal selects the target random access resource according to the indication information.
  • the terminal selects the target random access resource according to the indication information, and the terminal may determine, according to the SSB corresponding to the beam identifier, the random access resource associated with the SSB corresponding to the beam identifier, and then the random connection of the SSB associated with the beam identifier. In the resource, select the target random access resource.
  • the network device may configure the association between the SSB and the random access resource in advance through the configuration information, and then, after the network device indicates the beam identifier, determine the SSB corresponding to the beam, and then determine the random access corresponding to the SSB. Resources.
  • the terminal selects the target random access resource according to the indication information, and the terminal may determine the random access resource associated with the SSB according to the SSB, and then select the target random access in the random access resource associated with the SSB. Resources.
  • one or more SSBs may be associated with the same random access resource, for example, one or more SSBs are associated with the same random access resource subset/subset of subsets (subset of RACH resources/subset of Preamble indices), then, the subset of random access resources/preamble identifiers corresponding to one or more SSBs included in the indication information may be different from each other.
  • the subset of random access resources/the subset of preamble identifiers corresponding to one or more SSBs corresponding to one or more beam identifiers included in the indication information may be different from each other.
  • the indication information includes: identifier information of a random access resource whose load satisfies a low load condition.
  • the terminal selects the target random access resource according to the indication information, and the terminal may select the target random access resource in the random access resources in which the load satisfies the low load condition.
  • the probability that the random access resources satisfying the low load condition are selected as the target random access resources is improved.
  • the priority of the random access resources or the selection probability is determined in order from the low to the high, and no limitation is imposed herein.
  • the indication information includes: identifier information of the random access resource whose load meets a high load condition.
  • the terminal selects the target random access resource according to the indication information, and the terminal may select the target random access resource in the random access resource except the random access resource in which the load satisfies the high load condition.
  • the probability that the random access resources satisfying the high load condition are selected as the target random access resources is reduced.
  • the priority of the random access resources or the selection probability is determined in order from the highest to the lowest, and is not limited herein.
  • the terminal may further receive a backoff indicator (BI) sent by the network device, and determine, when the backoff information meets the preset condition, that the current random access resource is changed. .
  • BI backoff indicator
  • the terminal selects the target random access resource according to the indication when the backoff information satisfies the preset condition.
  • the random access resource is changed to reduce the delay, that is, the target random access resource is reselected, and the next random access is initiated on the new random access resource. Try it.
  • the changing the current random access resource may refer to reselecting the random access resource and initiating a new random access attempt on the new random access resource. For example, after the last random access attempt, if the terminal determines to change the current random access resource, the terminal may reselect the random access resource and initiate the next random access attempt on the reselected random access resource.
  • the terminal can maintain the same random access when the random access attempt is initiated on the new random access resource.
  • Preamble send count counter When a random access attempt is made, the terminal collects a preamble transmission counter. If the number of times the random access preamble is sent is greater than a predetermined value (for example, preambleTransMax), the random access may be considered as failed.
  • a predetermined value for example, preambleTransMax
  • the terminal can maintain the number of transmission times counter of the same random access preamble. In this way, when the sum of the number of transmissions of the random access preamble on the different random access resources is greater than the predetermined value, the terminal may also be considered as a random access failure.
  • the terminal may not maintain the same random access preamble transmission number counter, for example, independently count the number of times the random access preamble is sent on different random access resources. This application is not limited.
  • the terminal determines to change the current random access resource when the backoff information is greater than the first preset threshold.
  • the terminal first generates a backoff variable according to the backoff information (which can be recorded as “backoff value”), and determines to change the current random access resource when the backoff variable is greater than the second preset threshold.
  • backoff value the backoff information
  • the first preset threshold and the second preset threshold may be notified to the terminal after the network device is determined, or may be configured by the terminal itself, or specified in the standard, and the present application is not limited.
  • the terminal when there are multiple available random access resources, the terminal first considers the BI of the random access resource currently in use, and if the BI of the currently used random access resource satisfies the preset condition, then the terminal considers To replace the random access resource, you can use the above method to determine the target random access resource.
  • the BI corresponding to the target random access resource may be further considered. If the BI corresponding to the target random access resource does not meet the preset condition, the target random access resource may be used to initiate random access. process.
  • the network device may indicate whether the terminal further uses the BI after determining the new target random access resource, or the terminal itself may decide whether to use the BI after determining the new target random access resource.
  • the use of BI specifically means, for example, that the terminal continues to perform the backoff operation using the BI value.
  • the terminal may also reduce the backoff value according to the actual load condition, which is not specifically limited in this application.
  • the terminal may adjust the backoff information or the backoff variable according to the adjustment coefficient, and the adjustment coefficient may be configured by the network device or determined by the terminal itself. According to the preset rule, the original BI can be calculated together with the adjustment coefficient to obtain new backoff information.
  • the foregoing network device sends the indication information to the terminal, where the network device may send the indication information by means of a broadcast.
  • the network device periodically broadcasts the indication information.
  • the indication information may be sent after the backoff information.
  • the network device sends the indication information by sending the message of the backoff information.
  • the indication information may carry the reserved information in the Medium Access Control Subheader (MAC subheader) in the BI to carry the foregoing indication information.
  • MAC subheader Medium Access Control Subheader
  • the absolute information may be indicated, or the relative information may be indicated.
  • the absolute number of the beam may be indicated, and the relative number of the beam relative to the current beam of the terminal may also be indicated.
  • the E/T/R/R/BI MAC subheader indicates a type of MAC subheader, E represents an extended field, T represents a type field, R identifies a reserved bit field, and BI identifies a Backoff Indicator value field.
  • E represents an extended field
  • T represents a type field
  • R identifies a reserved bit field
  • BI identifies a Backoff Indicator value field.
  • FIG. 3 is a schematic diagram of a beam number in an embodiment of the present application.
  • the network device has 5 transmit beams, and the beam corresponding to SSB3 has the best signal quality for the terminal.
  • the terminal determines that the random access procedure is initiated on the random access resource corresponding to the SSB3, if the network device needs to allow the terminal to backoff the random access initiated by the random access resource corresponding to the SSB3, the network device sends the BI to the terminal.
  • the above indication information is carried by the reserved bits of the E/T/R/R/BI MAC subheader.
  • the two reserved bits may indicate the absolute number of one beam at a time.
  • an information bit may also be reserved, and the indication information is not indicated.
  • 00 in FIG. 3 does not indicate SSB1, but indicates that the network device does not send the indication information.
  • the two reserved bits can indicate up to three numbers.
  • FIG. 4 is a schematic diagram of another beam number in the embodiment of the present application.
  • the two reserved bits may indicate the relative numbers of the two beams at a time.
  • an information bit can also be reserved without indicating the above indication information.
  • the above 00 does not indicate SSB2 and SSB4, but indicates that the network device does not send the indication information.
  • FIG. 5 is a schematic flowchart of a random access method according to another embodiment of the present disclosure. As shown in FIG. 5, the method includes:
  • the terminal receives the backoff information sent by the network device.
  • the terminal determines to change the current random access resource when the preset information is met according to the backoff information.
  • the terminal does not have a large delay.
  • the terminal changes the random access resource to reduce the delay, that is, reselects the target random access resource.
  • the terminal determines to change the current random access resource when the backoff information is greater than the first preset threshold.
  • the terminal first generates a backoff variable according to the backoff information (which may be recorded as a “backoff value”), and determines to change the current random access resource when the backoff variable is greater than the second preset threshold.
  • the backoff information which may be recorded as a “backoff value”
  • the first preset threshold and the second preset threshold may be notified to the terminal after the network device is determined, or may be configured by the terminal itself, or specified in the standard, and the present application is not limited.
  • the network device may send indication information to the terminal, indicating load information of the candidate random access resource, as shown in the foregoing embodiment.
  • the indication information includes: identification information of the random access resource whose load satisfies the low load condition, and/or identification information of the random access resource whose load satisfies the high load condition.
  • the target random access resource after the change is selected in the random access resource whose load satisfies the low load condition.
  • the backoff variable is greater than the second preset threshold
  • determining that the current random access resource is changed is an example. If the indication information includes: the identifier of the random access resource whose load meets the low load condition, the terminal has the backoff variable greater than the second preset threshold. In the random access resource whose load satisfies the low load condition, the target random access resource after the change is selected.
  • the changed target random access resource is selected in the random access resource except the random access resource whose load satisfies the high load condition.
  • the terminal determines that the current random access resource is changed. If the indication information includes: the identifier of the random access resource whose load meets the high load condition, the terminal has the backoff variable greater than the second preset threshold. In the random access resource other than the random access resource whose load satisfies the high load condition, the target random access resource after the change is selected.
  • the method may be used in the foregoing method embodiments, and details are not described herein.
  • FIG. 6 is a schematic structural diagram of a terminal according to an embodiment of the present disclosure. As shown in FIG. 6, the terminal may include: a receiving module 601 and a processing module 602, where:
  • the receiving module 601 is configured to receive indication information sent by the network device, where the indication information is used to indicate load information of the candidate random access resource.
  • the processing module 602 is configured to select a target random access resource according to the indication information, and initiate a random access procedure by using the target random access resource.
  • the indication information includes: identifier information of a random access resource whose load satisfies a low load condition, and/or identifier information of a random access resource whose load satisfies a high load condition.
  • the identifier information is one or more of the following: a random access resource subset information, a preamble identifier subset information, a beam identifier, and a synchronization signal block identifier.
  • the processing module 602 is specifically configured to select the target in the random access resource in which the load meets the low load condition. Random access resources.
  • the processing module 602 when the indication information includes: the identifier information of the random access resource that meets the high load condition, the processing module 602 is specifically configured to use, in addition to the random access resource that the load satisfies the high load condition. In the random access resource, the target random access resource is selected.
  • the receiving module 601 is configured to receive backoff information sent by the network device.
  • the processing module 602 is further configured to: when the backoff information meets a preset condition, determine to change the current random access resource.
  • the processing module 602 is specifically configured to: when the backoff information is greater than the first preset threshold, determine to change the current random access resource.
  • the processing module 602 is specifically configured to generate a backoff variable according to the backoff information, and determine to change the current random access resource when the backoff variable is greater than the second preset threshold.
  • processing module 602 is further configured to receive indication information that is sent by the network device, where the indication information is used to indicate load information of the candidate random access resource.
  • the indication information includes: identifier information of a random access resource whose load satisfies a low load condition, and/or identifier information of a random access resource whose load satisfies a high load condition.
  • FIG. 7 is a schematic structural diagram of a network device according to an embodiment of the present disclosure.
  • the network device may include: a determining module 801 and a sending module 802, where:
  • the determining module 801 is configured to determine indication information, where the indication information is used to indicate load information of the candidate random access resource.
  • the sending module 802 is configured to send the indication information to the terminal.
  • the indication information includes: identifier information of a random access resource whose load satisfies a low load condition, and/or identifier information of a random access resource whose load satisfies a high load condition.
  • the identifier information is one or more of the following: a random access resource subset information, a preamble identifier subset information, a beam identifier, and a synchronization signal block identifier.
  • the sending module 802 is further configured to send the backoff information to the terminal.
  • FIG. 8 is a schematic structural diagram of a terminal according to another embodiment of the present disclosure.
  • the terminal includes a processor 901, an application processor, a memory user interface, and other components (including a power source and the like not shown).
  • the above processing module may be the processor 901 and perform corresponding functions.
  • the sending module and/or the receiving module may be a wireless transceiver 903 in the figure, which performs corresponding functions through an antenna. It will be understood that the various elements shown in the figures are merely illustrative and are not essential elements of the embodiments.
  • the device can perform functions similar to the processor of Figure 8.
  • the device includes a processor, a transmit data processor, and a processor.
  • the above processing module may be the processor 110 and perform corresponding functions.
  • the sending module may be the transmitting data processor 111 of FIG. 10, and the receiving module may be the receiving data processor 112 of FIG.
  • a channel coder and a channel decoder are shown in the drawings, it is to be understood that these modules are not intended to be limiting, and are merely illustrative.
  • the processing device 1000 includes modules such as a modulation subsystem, a central processing subsystem, and a peripheral subsystem.
  • the communication device in this embodiment can be used as a modulation subsystem therein.
  • the modulation subsystem may include a processor 1003, an interface 1004.
  • the processor 1003 performs the functions of the foregoing processing module
  • the interface 1004 performs the functions of the foregoing sending module and/or the receiving module.
  • the modulation subsystem includes a memory 1006, a processor 1003, and a program stored on the memory and executable on the processor, the processor implementing the method described in the previous embodiments when the program is executed.
  • the memory 1006 may be non-volatile or volatile, and its location may be located inside the modulation subsystem or in the processing device 1000 as long as the memory 1006 can be connected to the The processor 1003 is sufficient.
  • a computer readable storage medium having stored thereon a method of executing execution of the terminal in the foregoing embodiment when the instruction is executed.
  • the communication device in this embodiment is a network device
  • the device shown in FIG. 11 which includes a processor 1201, an application processor, a memory user interface, and other components (including a power source and the like not shown).
  • the above processing module selection module, access module, determination module, etc.
  • the sending module and/or the receiving module may be a wireless transceiver 1203 in the figure, which performs corresponding functions through an antenna. It will be understood that the various elements shown in the figures are illustrative only and are not required to complete the embodiments.
  • the device includes a processor, a transmit data processor, and a processor.
  • the above processing module may be the processor 1301 and perform corresponding functions.
  • the sending module may be the transmitting data processor 1303 in FIG. 12, and the receiving module may be the receiving data processor 1305 in FIG.
  • a channel coder and a channel decoder are shown in the drawings, it is to be understood that these modules are not intended to be limiting, and are merely illustrative.
  • the processing device 1400 includes modules such as a modulation subsystem, a central processing subsystem, and a peripheral subsystem.
  • the network device in this embodiment can be used as a modulation subsystem therein.
  • the modulation subsystem may include a processor 1403, an interface 1404.
  • the processor 1403 performs the functions of the foregoing processing module
  • the interface 1404 performs the functions of the foregoing sending module and/or the receiving module.
  • the modulation subsystem includes a memory 1406, a processor 1403, and a program stored on the memory and executable on the processor, the processor implementing the above-described embodiment method when the program is executed.
  • the memory 1406 may be non-volatile or volatile, and its location may be located inside the modulation subsystem or in the processing device 1400 as long as the memory 1406 can be connected to the The processor 1403 is sufficient.
  • a computer readable storage medium having stored thereon a method of executing a network device execution when the instruction is executed.
  • the processor may be a general-purpose processor, a digital signal processor (DSP), an application specific integrated circuit (ASIC), or a field programmable gate array (FPGA). Or other programmable logic devices, discrete gates or transistor logic devices, discrete hardware components.
  • DSP digital signal processor
  • ASIC application specific integrated circuit
  • FPGA field programmable gate array
  • the general purpose processor may be a microprocessor or the processor or any conventional processor or the like.
  • the steps of the method disclosed in the embodiments of the present application may be directly implemented by the hardware decoding processor, or may be performed by a combination of hardware and software modules in the decoding processor.
  • the software module can be located in a random access memory (RAM), a flash memory, a read-only memory (ROM), a programmable read only memory or an electrically erasable programmable memory, a register, etc.
  • RAM random access memory
  • ROM read-only memory
  • programmable read only memory or an electrically erasable programmable memory
  • register etc.
  • the storage medium is located in the memory 1002, and the processor 1001 reads the instructions in the memory 1002 and completes the steps of the above method in combination with its hardware.
  • the disclosed systems, devices, and methods may be implemented in other manners.
  • the device embodiments described above are merely illustrative.
  • the division of the unit is only a logical function division.
  • there may be another division manner for example, multiple units or components may be combined or Can be integrated into another system, or some features can be ignored or not executed.
  • the mutual coupling or direct coupling or communication connection shown or discussed may be an indirect coupling or communication connection through some interface, device or unit, and may be in an electrical, mechanical or other form.
  • 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, may be located in one place, or may be distributed to multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of the embodiment.
  • each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit.
  • the functions may be stored in a computer readable storage medium if implemented in the form of a software functional unit and sold or used as a standalone product.
  • the technical solution of the present application which is essential or contributes to the prior art, or a part of the technical solution, may be embodied in the form of a software product, which is stored in a storage medium, including
  • the instructions are used to cause a computer device (which may be a personal computer, server, or network device, etc.) or a processor to perform all or part of the steps of the methods described in the various embodiments of the present application.
  • the foregoing storage medium includes: a U disk, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk, or an optical disk, and the like. .
  • the method proposed in this embodiment is mainly for the problem of how to handle the terminal if another RACH process is performed if a random access (RACH) process is being performed.
  • RACH random access
  • the terminal determines whether to stop the current random access and starts a new random access (RACH) process according to the current random access progress.
  • RACH new random access
  • the RACH process is about to be completed, and the current RACH process does not need to be stopped.
  • the terminal may determine whether to stop the current RACH process by combining the event priority of triggering the new RACH and the priority of the currently performed RACH event, and the progress of the current RACH.
  • the new trigger event has a high priority, and the ongoing RACH process can start, and the ongoing RACH process can be stopped to start a new RACH process.
  • the new trigger event has a low priority and the ongoing RACH process is about to be completed.
  • the original RACH process can be continued without stopping the ongoing RACH process.
  • the priority of the two criteria of triggering the event priority and the RACH progress may be defined, for example, the RACH progress criterion has a higher priority.
  • the terminal If a new event triggers a new RACH procedure and the priority is high, if the terminal does not stop the current RACH procedure, the terminal also needs to adjust the priority of the currently ongoing RACH procedure according to the event priority of the newly triggered RACH procedure.
  • the level for example, can determine the parameters of the BI based on the new priority.

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Abstract

本申请提供一种随机接入方法、终端及网络设备，该方法包括：终端接收网络设备发送的指示信息，所述指示信息用于指示候选随机接入资源的负载信息；所述终端根据所述指示信息，选择目标随机接入资源；所述终端采用所述目标随机接入资源发起随机接入过程。实现了根据候选随机接入资源的负载情况来选择发起随机接入过程的随机接入资源，以尽量减少随机接入的时延。

Description

随机接入方法、终端及网络设备
本申请要求于2018年02月26日提交中国专利局、申请号为201810160105.1、申请名称为“随机接入方法、终端及网络设备”的中国专利申请的优先权，其全部内容通过引用结合在本申请中。
技术领域
本申请涉及无线通信领域，尤其涉及一种随机接入方法、终端及网络设备。
背景技术
第五代(5G)通信***中采用相对于长期演进(Long Term Evolution，LTE)更高的载波频率，一般地，采用大于6千兆赫兹(GHz)以上的载波频率，比如28GHz、38GHz、或者60GHz频段等，来实现更大带宽、更高传输速率的无线通信。由于载波频率较高，使得其发射的无线信号在空间传播过程中经历更加严重的衰落，甚至在接收端难以检测出该无线信号。为此，5G通信***中采用波束赋形(beamforming，BF)技术来获得具有良好方向性的波束，以提高在发射方向上的功率，改善接收端的信干噪比(Signal to Interference plus Noise Ratio，SINR)。5G新空口(New Radio，NR)中会用波束扫描(Beam Sweeping)过程来确定发送接收点(Transmission reception point，TRP)和终端之间的波束对。
每个下行波束(beam)基站都会发送同步信号块(Synchronization Signal Block，SSB)，包括主辅同步信号和物理广播信道(Physical Broadcast Channel，PBCH)，用于终端获取下行同步和必要的***信息。为了终端上行接入网络，基站会通过***消息配置一个或者多个SSB时隙与随机接入资源的对应关系，以使得终端在检索到SSB，并基于SSB完成下行beam选择之后，可以知道通过什么样的随机接入资源向网络发起随机接入。
但是上述方案设计有缺陷可能导致较大时延。
发明内容
本申请提供一种随机接入方法、终端及网络设备，以降低随机接入过程中的时延。
第一方面，本申请提供一种随机接入方法，包括：
终端接收网络设备发送的指示信息，所述指示信息用于指示候选随机接入资源的负载信息；
所述终端根据所述指示信息，选择目标随机接入资源；
所述终端采用所述目标随机接入资源发起随机接入过程。
在一个可能的设计中，所述指示信息包括：负载满足低负载条件的随机接入资源的标识信息、和/或负载满足高负载条件的随机接入资源的标识信息。
通过对负载条件的区分，可以实现更准确的随机接入过程。
在一个可能的设计中，所述标识信息为下述一项或多项：随机接入资源子集信息、前导标识子集信息、波束标识、同步信号块标识。
在一个可能的设计中，所述指示信息包括：负载满足低负载条件的随机接入资源的标识信息时，
所述终端根据所述指示信息，选择目标随机接入资源，包括：
所述终端在所述负载满足低负载条件的随机接入资源中，选择所述目标随机接入资源。
在一个可能的设计中，所述指示信息包括：负载满足高负载条件的随机接入资源的标识信息时，
所述终端根据所述指示信息，选择目标随机接入资源，包括：
所述终端在除所述负载满足高负载条件的随机接入资源之外的随机接入资源中，选择所述目标随机接入资源。
在一个可能的设计中，所述标识信息包括波束标识时，
所述终端根据所述指示信息，选择目标随机接入资源之前，还包括：
所述终端根据所述波束标识，确定所述波束标识对应的同步信号块；
所述终端根据所述指示信息，选择目标随机接入资源，包括：
所述终端根据所述波束标识对应的同步信号块；
根据所述波束标识对应的同步信号块关联的随机接入资源，选择目标随机接入资源。
在一个可能的设计中，所述标识信息包括同步信号块标识时，
所述终端根据所述指示信息，选择目标随机接入资源，包括：
所述终端根据所述同步信号块，确定所述同步信号块关联的随机接入资源；
根据所述同步信号块关联的随机接入资源，选择目标随机接入资源。
在一个可能的设计中，所述终端根据所述指示信息，选择目标随机接入资源之前，还包括：
所述终端接收网络设备发送的退避信息；
所述终端在所述退避信息满足预设条件时，确定变更当前随机接入资源。
通过预设条件的引入，可以更合理的控制资源。
在一个可能的设计中，所述终端根据所述退避信息满足预设条件时，确定变更当前随机接入资源，包括：
所述终端在所述退避信息大于第一预设阈值时，确定变更当前随机接入资源。
在一个可能的设计中，所述终端根据所述退避信息满足预设条件时，确定变更当前随机接入资源，包括：
所述终端根据所述退避信息生成退避变量；
所述终端在所述退避变量大于第二预设阈值时，确定变更当前随机接入资源。
第二方面，本申请提供一种随机接入方法，包括：
终端接收网络设备发送的退避信息；
所述终端根据所述退避信息满足预设条件时，确定变更当前随机接入资源。
在一个可能的设计中，所述终端根据所述退避信息满足预设条件时，确定变更当前随机接入资源，包括：
所述终端在所述退避信息大于第一预设阈值时，确定变更当前随机接入资源。
在一个可能的设计中，所述终端根据所述退避信息满足预设条件时，确定变更当前随机接入资源，包括：
所述终端根据所述退避信息生成退避变量；
所述终端在所述退避变量大于第二预设阈值时，确定变更当前随机接入资源。
在一个可能的设计中，所述方法还包括：
所述终端接收网络设备发送的指示信息，所述指示信息用于指示随机接入资源的负载信息。
在一个可能的设计中，所述指示信息包括：负载满足低负载条件的随机接入资源的标识信息、和/或负载满足高负载条件的随机接入资源的标识信息。
实现了终端可以结合随机接入资源的负载情况来选择目标随机接入资源。
在一个可能的设计中，所述标识信息为下述一项或多项：随机接入资源子集信息、前导标识子集信息、波束标识、同步信号块标识。
在一个可能的设计中，所述终端根据所述退避信息满足预设条件时，确定变更当前随机接入资源之后，
所述终端根据所述指示信息，选择目标随机接入资源；
所述终端采用所述目标随机接入资源发起随机接入过程。
在一个可能的设计中，所述指示信息包括：负载满足低负载条件的随机接入资源的标识信息时，
所述终端根据所述指示信息，选择目标随机接入资源，包括：
所述终端在所述负载满足低负载条件的随机接入资源中，选择所述目标随机接入资源。
在一个可能的设计中，所述指示信息包括：负载满足高负载条件的随机接入资源的标识信息时，
所述终端根据所述指示信息，选择目标随机接入资源，包括：
所述终端在除所述负载满足高负载条件的随机接入资源之外的随机接入资源中，选择所述目标随机接入资源。
第三方面，本申请提供一种随机接入方法，包括：
网络设备确定指示信息，所述指示信息用于指示候选随机接入资源的负载信息；
所述网络设备向终端发送所述指示信息。
在一个可能的设计中，所述指示信息包括：负载满足低负载条件的随机接入资源的标识信息、和/或负载满足高负载条件的随机接入资源的标识信息。
在一个可能的设计中，所述标识信息为下述一项或多项：随机接入资源子集信息、前导标识子集信息、波束标识、同步信号块标识。
在一个可能的设计中，所述方法还包括：
所述网络设备向所述终端发送退避信息。
第四方面，本申请提供一种随机接入方法，包括：
网络设备确定退避信息；
所述网络设备向所述终端发送所述退避信息。
第五方面，本申请提供一种终端，包括：
接收模块，用于接收网络设备发送的指示信息，所述指示信息用于指示候选随机接入资源的负载信息；
处理模块，用于根据所述指示信息，选择目标随机接入资源；采用所述目标随机接入资源发起随机接入过程。
在一个可能的设计中，所述指示信息包括：负载满足低负载条件的随机接入资源的标识信息、和/或负载满足高负载条件的随机接入资源的标识信息。
在一个可能的设计中，所述标识信息为下述一项或多项：随机接入资源子集信息、前导标识子集信息、波束标识、同步信号块标识。
在一个可能的设计中，所述指示信息包括：负载满足低负载条件的随机接入资源的标识信息时，
所述处理模块，具体用于在所述负载满足低负载条件的随机接入资源中，选择所述目标随机接入资源。
在一个可能的设计中，所述指示信息包括：负载满足高负载条件的随机接入资源的标识信息时，
所述处理模块，具体用于在除所述负载满足高负载条件的随机接入资源之外的随机接入资源中，选择所述目标随机接入资源。
在一个可能的设计中，所述接收模块，还用于接收网络设备发送的退避信息；
所述处理模块，用于在所述退避信息满足预设条件时，确定变更当前随机接入资源。
第六方面，本申请提供一种终端，包括：
接收模块，用于接收网络设备发送的退避信息；
处理模块，用于根据所述退避信息满足预设条件时，确定变更当前随机接入资源。
在一个可能的设计中，所述处理模块，具体用于在所述退避信息大于第一预设阈值时，确定变更当前随机接入资源。
在一个可能的设计中，所述处理模块，具体用于根据所述退避信息生成退避变量；在所述退避变量大于第二预设阈值时，确定变更当前随机接入资源。
在一个可能的设计中，所述接收模块，还用于接收网络设备发送的指示信息，所述指示信息用于指示候选随机接入资源的负载信息。
在一个可能的设计中，所述指示信息包括：负载满足低负载条件的随机接入资源的标识信息、和/或负载满足高负载条件的随机接入资源的标识信息。
第七方面，本申请提供一种网络设备，包括：
处理模块，用于确定指示信息，所述指示信息用于指示候选随机接入资源的负载信息；
发送模块，用于向终端发送所述指示信息。
在一个可能的设计中，所述指示信息包括：负载满足低负载条件的随机接入资源的标识信息、和/或负载满足高负载条件的随机接入资源的标识信息。
在一个可能的设计中，所述标识信息为下述一项或多项：随机接入资源子集信息、前导标识子集信息、波束标识、同步信号块标识。
在一个可能的设计中，所述发送模块，还用于向所述终端发送退避信息。
第八方面，本申请提供一种网络设备，包括：
处理模块，用于确定退避信息；
发送模块，用于向所述终端发送所述退避信息。
第九方面，本申请提供一种随机接入装置，所述装置包括处理器和存储器，存储器用于存储程序，处理器调用存储器存储的程序，以执行本申请第一方面或第二方面中任一个提供的方法，所述装置可以为终端，也可以为终端上的芯片。
第十方面，本申请提供一种随机接入装置，所述装置包括处理器和存储器，存储器用于存储程序，处理器调用存储器存储的程序，以执行本申请第三方面或第四方面中任一个提供的方法，所述装置可以为网络设备，也可以为网络设备上的芯片。
第十一方面，提供一种通信设备，包括处理器，和接口。所述处理器完成第五～第八方面中处理模块的功能。所述接口完成第五～第八方面中接收模块/发送模块的功能。
第十二方面，本申请提供一种计算机存储介质，该计算机存储介质用于存储程序，该程序用于执行上述第一～第四方面中任一项所述的任意一种方法。
本申请提供的随机接入方法、终端及网络设备中，网络设备向终端发送指示信息，该指示信息用于指示候选随机接入资源的负载信息，终端根据上述指示信息，选择目标随机接入资源，采用上述目标随机接入资源发起随机接入过程，实现了根据候选随机接入资源的负载情况来选择发起随机接入过程的随机接入资源，以尽量减少随机接入的时延。
附图说明
图1为本申请提供的一种通信***结构示意图；
图2为本申请一实施例提供的随机接入方法流程示意图；
图3为本申请实施例中一种波束编号示意图；
图4为本申请实施例中另一种波束编号示意图；
图5为本申请另一实施例提供的随机接入方法流程示意图；
图6为本申请一实施例提供的终端结构示意图；
图7为本申请一实施例提供的网络设备结构示意图；
图8为本申请另一实施例提供的终端结构示意图；
图9为本申请另一实施例提供的终端结构示意图；
图10为本申请又一实施例提供的终端结构示意图；
图11为本申请另一实施例提供的网络设备结构示意图；
图12为本申请另一实施例提供的网络设备结构示意图；
图13为本申请另一实施例提供的网络设备结构示意图。
具体实施方式
本申请实施例可以应用于无线通信***，需要说明的是，本申请实施例提及的无线通信***包括但不限于：窄带物联网***(Narrow Band-Internet of Things，NB-IoT)、全球移动通信***(Global System for Mobile Communications，GSM)、增强型数据速率GSM演进***(Enhanced Data rate for GSM Evolution，EDGE)、宽带码分多址***(Wideband Code Division Multiple Access，WCDMA)、码分多址2000***(Code Division Multiple Access，CDMA2000)、时分同步码分多址***(TimeDivision-Synchronization Code Division Multiple Access，TD-SCDMA)，长期演进***(Long Term Evolution，LTE)以及下一代5G移动通信***的三大应用场景增强型移动宽带(enhanced mobile broad band，eMBB)、URLLC以及大规模机器通信(massive machine-type communications，mMTC)。
图1为本申请提供的一种通信***结构示意图。
如图1所示，通信***01包括网设备101、终端102。当无线通信网络01包括核心网时，该网络设备101还可以与核心网相连。网络设备101还可以与互联网协议(internet protocol，IP)网络200进行通信，例如，因特网(internet)，私有的IP网，或其它数据网等。
网络设备为覆盖范围内的终端提供服务。例如，参见图1所示，网络设备101为网络设备101覆盖范围内的一个或多个终端提供无线接入。另外，网络设备之间还可以互相通信。
在本申请实施例中，终端(terminal device)102包括但不限于移动台(MS，Mobile Station)、移动终端(mobile terminal)、移动电话(mobile telephone)、手机(handset)及便携设备(portable equipment)等，该终端可以经无线接入网(RAN，radio access network)与一个或多个核心网进行通信，例如，终端可以是移动电话(或称为“蜂窝”电话)、具有无线通信功能的计算机等，终端102还可以是便携式、袖珍式、手持式、计算机内置的或者车载的移动装置或设备。
网络设备101可以是用于与终端102进行通信的设备。例如，可以是GSM***或CDMA***中的基站(base transceiver station，BTS)，也可以是WCDMA***中的基站(NodeB，NB)，还可以是LTE***中的演进型基站(evolved node b，eNB或eNodeB)或未来5G网络中的网络侧设备等。或者该网络设备还可以是中继站、接入点、车载设备等。在终端对终端(Device to Device，D2D)通信***中，该网络设备还可以是担任基站功能的终端。
需要说明的是，图1所示的通信***01中所包含的终端的数量和类型仅仅是一种例举，本申请实施例也并不限制于此。譬如，还可以包括更多与网络设备进行通信的蜂窝终端，或者包括更多进行设备到设备D2D通信的D2D终端，为简明描述，不在附图中一一描述。此外，所述通信***01可以并不限于包括所述网络设备和终端，譬如还可以包括核心网设备或用于承载虚拟化网络功能的设备等，这些对于本领域普通技术人员而言是显而易见的，在此不一一详述。
需要说明的是，在某些场景下，例如,工业自动化，自动驾驶，增强现实/虚拟现实(AR/VR)等，需要时延敏感数据传输，时延要求较高。
图2为本申请一实施例提供的随机接入方法流程示意图，如图2所示，该方法包括：
S201、网络设备向终端发送指示信息，该指示信息用于指示候选随机接入资源的负载信息。
其中，候选随机接入资源可以是当前没有使用的随机接入资源，或者指未来可能会用到的随机接入资源。当然，不以此为限，也可能包括未来不使用的随机接入资源。
需要说明的是，所述候选随机接入资源的负载信息包含一个或者多个随机接入资源的负载信息。
网络设备确定指示信息后，向终端发送该指示信息。
S202、终端根据上述指示信息，选择目标随机接入资源。
终端收到指示信息后，根据指示信息，选择目标随机接入资源。
S203、终端采用上述目标随机接入资源发起随机接入过程。
终端通过指示信息指示的指示候选随机接入资源的负载信息，确定更为合适的目标随机接入资源发起随机接入过程。
随机接入资源包括随机接入时频资源和/或前导码。目标随机接入资源包括随机接入时频资源子集和/或前导索引子集(subset of RACH resources and/or subset of preamble indices)对应的时频资源和/或序列资源。
需要说明的是，随机接入资源时频子集(subset of RACH resources)可以包括：分组随机接入信道(Packet Random Access Channel，PRACH)配置索引，速度标识，PRACH频域偏移等。如果是覆盖增强场景，随机接入资源时频子集(还可以包括重复起始子帧，控制信道重复次数，跳频模式等。
具体地，发起随机接入过程可以理解为终端在上述目标随机接入资源中的随机接入时频资源上，向网络设备发送从上述目标随机接入资源中的前导码索引子集对应的前导码中选取的随机接入前导(preamble)。也可以是终端采用上述目标随机接入资源向网络设备发送随机接入请求等，在此不作限制。
具体地，发起随机接入过程可以理解为终端在上述目标随机接入资源中的随机接入时频资源上，向网络设备发送从上述目标随机接入资源中的前导码索引子集对应的前导码中选取的随机接入前导(preamble)。也可以是终端采用上述目标随机接入资源向网络设备发送随机接入请求等，在此不作限制。
需要说明的是，本申请中作为执行主体的终端是满足随机接入条件的终端。例如多个终端中发起的随机接入过程优先级较高或较低的终端。
本实施例中，网络设备向终端发送指示信息，该指示信息用于指示候选随机接入资源的负载信息，终端根据上述指示信息，选择目标随机接入资源，采用上述目标随机接入资源发起随机接入过程，实现了根据候选随机接入资源的负载情况来选择发起随机接入过程的随机接入资源，以尽量减少随机接入的时延。
在一个可能的设计中，指示信息用于指示负载满足低负载条件的随机接入资源、 和/或负载满足高负载条件的随机接入资源。
一种实施方式中，上述指示信息包括：负载满足低负载条件的随机接入资源的标识信息、和/或负载满足高负载条件的随机接入资源的标识信息。
可以理解的是，所述指示信息用于指示候选随机接入资源的负载信息，可以为，指示满足负载低负载条件的随机接入资源或者负载低负载条件的随机接入资源标识，和/或所述指示信息指示满足负载高负载条件的随机接入资源或者负载高负载条件的随机接入资源的标识。
网络设备在指示负载信息时，可以是指示负载较轻的随机接入资源，也可以指示负载较高的随机接入资源。
可选地，负载满足低负载条件的随机接入资源可以指负载低于预设阈值a的随机接入资源。或者，也可以指跟其他随机接入资源相比负载较低的随机接入资源，例如一共M个随机接入资源中，相对来说负载较低的N1个随机接入资源被认为是负载满足低负载条件的随机接入资源。M为大于0的整数，N1为大于0、小于或等于M的整数。
负载满足高负载条件的随机接入资源可以指负载高于预设阈值b的随机接入资源。或者，也可以指跟其他随机接入资源相比负载较高的随机接入资源，例如一共M个随机接入资源中，相对来说负载较高的N2个随机接入资源被认为是负载满足高负载条件的随机接入资源。M为大于0的整数，N2为大于0、小于或等于M的整数。
可选地，上述标识信息可以为下述一项或多项：随机接入资源子集信息(subset of RACH resources)、前导标识子集信息(subset of preamble indices)、波束标识、同步信号块(SSB)标识。即通过这些信息中的一项或多项来指示对应随机接入资源的负载信息。
可以预先定义或配置好指示负载满足低负载条件的随机接入资源的标识信息、和/或负载满足高负载条件的随机接入资源的标识信息。然后通过上述标识信息直接或间接地指示负载满足低负载条件的随机接入资源的标识信息、和/或负载满足高负载条件的随机接入资源的标识信息。
具体地，如果指示信息是随机接入资源子集信息、前导标识子集信息，终端可以直接确定出对应的随机接入资源。
如果指示信息是波束标识、SSB标识，那么终端可以间接来确定对应的随机接入资源。
可选地，标识信息包括波束标识时，终端根据指示信息，选择目标随机接入资源之前，终端可以根据该波束标识，确定波束标识对应的SSB。
相应地，终端根据指示信息，选择目标随机接入资源，可以是：终端根据波束标识对应的SSB，确定波束标识对应的SSB关联的随机接入资源，进而在波束标识对应的SSB关联的随机接入资源中，选择目标随机接入资源。
需要说明的是，网络设备可以预先通过配置信息向终端配置SSB与随机接入资源的关联关系，那么当网络设备指示了波束标识后，确定波束对应的SSB，再确定该SSB对应的随机接入资源。
进一步地，标识信息包括SSB时，终端根据指示信息，选择目标随机接入资 源，可以是终端根据SSB确定SSB关联的随机接入资源，进而在SSB关联的随机接入资源中选择目标随机接入资源。
需要说明的是，可能一个或者多个SSB与同一个随机接入资源关联，比如，一个或者多个SSB关联到同一个随机接入资源子集/前导标识子集(subset of RACH resources/subset of preamble indices)，那么，可以要求，所述指示信息中包含的一个或者多个SSB对应的随机接入资源子集/前导标识子集相互之间是不同的。
同样，可以要求，所述指示信息中包含的一个或者多个波束标识对应的一个或者多个SSB对应的随机接入资源子集/前导标识子集相互之间是不同的。
一种方式中，指示信息包括：负载满足低负载条件的随机接入资源的标识信息。
相应地，终端根据指示信息，选择目标随机接入资源，可以是终端在这些负载满足低负载条件的随机接入资源中，选择上述目标随机接入资源。
或者，终端获取负载满足低负载条件的随机接入资源后，提升这些负载满足低负载条件的随机接入资源被选为目标随机接入资源的概率。例如，根据负载满足低负载条件的随机接入资源中，负载由低到高的顺序，依次确定这些随机接入资源的优先级、或者选择概率，在此不作限制。
又一种方式中，指示信息包括：负载满足高负载条件的随机接入资源的标识信息。
相应地，终端根据指示信息，选择目标随机接入资源，可以是终端在除上述负载满足高负载条件的随机接入资源之外的随机接入资源中，选择所述目标随机接入资源。
或者，终端获取负载满足高负载条件的随机接入资源后，降低这些负载满足高负载条件的随机接入资源被选为目标随机接入资源的概率。例如，根据负载满足高负载条件的随机接入资源中，负载由高到低的顺序，依次确定这些随机接入资源的优先级、或者选择概率，在此不作限制。
进一步地，上述终端根据指示信息，选择目标随机接入资源之前，终端还可以接收网络设备发送的退避信息(backoff indicator，BI)，在退避信息满足预设条件时，确定变更当前随机接入资源。
可以理解为终端在退避信息满足预设条件时，根据指示选择目标随机接入资源。
即为了保证时延不会太大，在退避信息满足一定条件时，变更随机接入资源来降低时延，即重新选择目标随机接入资源，在新的随机接入资源上发起下次随机接入尝试。
需要说明的是，所述变更当前随机接入资源，可以指重新选择随机接入资源，在新的随机接入资源上发起新的随机接入尝试。比如，上次随机接入尝试之后，如果终端确定变更当前随机接入资源，可以指，终端重新选择随机接入资源，在重新选择的随机接入资源上，发起下次随机接入尝试。
需要说明的是，终端在确定变更当前随机接入资源，并且重新选择了新的随机接入资源后，在新的随机接入资源上发起随机接入尝试时，终端可以维护同一个随机接入前导发送次数计数器。终端在进行随机接入尝试时，会统计一个随机接入前导的发送次数(preamble transmission counter)，如果该随机接入前导的发送次数大于预定 值(比如，preambleTransMax)，可以认为随机接入失败。这里，终端在不同的随机接入资源上进行随机接入尝试时，可以维护同一个随机接入前导的发送次数计数器。这样，终端在不同的随机接入资源上的随机接入前导的发送次数总和大于预定值时，也可以认为是随机接入失败。
当然，终端也可以不维护同一个随机接入前导发送次数计数器，比如，独立统计在不同的随机接入资源上随机接入前导的发送次数。本申请不做限定。
一种方式中，终端在所述退避信息大于第一预设阈值时，确定变更当前随机接入资源。
或者，终端先根据退避信息生成一个退避变量(可以记为“退避值”)，在退避变量大于第二预设阈值时，确定变更当前随机接入资源。
第一预设阈值、第二预设阈值可以是网络设备确定好之后通知给终端的，也可以是终端自己配置的，或者在标准中进行规定等，本申请不做限制。
需要说明的是，在有多个可用的随机接入资源时，终端先考虑当前在使用的随机接入资源的BI，如果当前在使用的随机接入资源的BI满足预设条件，那么就考虑更换随机接入资源，具体可以采用上述方法确定目标随机接入资源。
确定完目标随机接入资源之后，还可以进一步考虑目标随机接入资源对应的BI，如果目标随机接入资源对应的BI不满足预设条件，就可以使用该目标随机接入资源发起随机接入过程。
当然可以由网络设备指示终端在确定了新的目标随机接入资源之后是否还使用BI，也可以由终端自己决定在确定了新的目标随机接入资源之后是否还使用BI。所述使用BI，具体指，比如，终端继续使用所述BI值执行退避操作。
另外，如果确定在新的目标随机接入资源上继续使用BI，终端也可以根据实际负载状况减小退避值，本申请不具体限定。
可选地一种方式中，终端可以根据调整系数调整退避信息或者退避变量，该调整系数可以由网络设备配置或者由终端自己确定。可以根据预设规则，将原有的BI与调整系数一起进行运算，得到新的退避信息。
可选地，上述网络设备向终端发送指示信息，可以是：网络设备可以通过广播的方式发送上述指示信息。例如网络设备周期性地广播指示信息。
其中，指示信息可以在退避信息之后发送。
或者，网络设备通过发送上述退避信息的消息发送上述指示信息。具体地，指示信息可以携带在BI中媒体接入控制子头(Medium Access Control subheader，MAC subheader)中的预留位携带上述指示信息。
具体地，如果采用E/T/R/R/BI MAC subheader的预留位携带上述指示信息，可以指示绝对信息，也可以指示相对信息。比如，如果通过波束标识指示随机接入资源的话，可以指示beam的绝对编号，也可以指示beam相对于终端当前beam的相对编号。
所述E/T/R/R/BI MAC subheader指示一种MAC subheader类型，E代表扩展字段，T代表类型字段，R标识预留位字段，BI标识退避(Backoff Indicator)值字段。具体可以参见图3、图4。
图3为本申请实施例中一种波束编号示意图。
举例说明，网络设备有5个发送beam，并且SSB3对应的beam对于终端来说信号质量最好。终端确定在SSB3对应的随机接入资源上发起随机接入过程时，如果网络设备需要让终端在SSB3对应的随机接入资源发起的随机接入进行退避，那么，网络设备向终端发送了BI，并通过E/T/R/R/BI MAC subheader的预留位携带上述指示信息。
一种方式中，如图3所示，指示当前beam的绝对编号的话，两个预留位可以一次指示一个beam的绝对编号。
当然，也可以预留一个信息位，不指示上述指示信息，比如图3中00不指示SSB1，而是指示网络设备没有发送指示信息。这样，两个预留位最多可以指示三个编号。
图4为本申请实施例中另一种波束编号示意图。
如图4所示，如果指示相对编号的话，两个预留位可以一次指示两个beam的相对编号。
类似地，也可以预留一个信息位，不指示上述指示信息。比如上述00，不再指示SSB2和SSB4，而是指示网络设备没有发送指示信息。
图5为本申请另一实施例提供的随机接入方法流程示意图，如图5所示，该方法包括：
S501、终端接收网络设备发送的退避信息。
S502、终端根据上述退避信息满足预设条件时，确定变更当前随机接入资源。
本实施例中，终端为了保证时延不会太大，在退避信息满足一定条件时，变更随机接入资源来降低时延，即重新选择目标随机接入资源。
具体过程与前述实施例相似：
一种可选地实施方式中，终端在所述退避信息大于第一预设阈值时，确定变更当前随机接入资源。
或者，另一种可选地实施方式中，终端先根据退避信息生成一个退避变量(可以记为“退避值”)，在退避变量大于第二预设阈值时，确定变更当前随机接入资源。
第一预设阈值、第二预设阈值可以是网络设备确定好之后通知给终端的，也可以是终端自己配置的，或者在标准中进行规定等，本申请不做限制。
为了更好地降低随机接入时延，还可以如前述实施例所示，网络设备向终端发送指示信息，指示候选随机接入资源的负载信息。
指示信息包括：负载满足低负载条件的随机接入资源的标识信息、和/或负载满足高负载条件的随机接入资源的标识信息。
以终端在所述退避信息大于第一预设阈值时，确定变更当前随机接入资源为例，若指示信息包括：负载满足低负载条件的随机接入资源的标识信息，终端在退避信息大于第一预设阈值时，在负载满足低负载条件的随机接入资源中，选择变更后的目标随机接入资源。
以退避变量大于第二预设阈值时，确定变更当前随机接入资源为例，若指示信息包括：负载满足低负载条件的随机接入资源的标识信息，终端在退避变量大于第二预 设阈值时，在负载满足低负载条件的随机接入资源中，选择变更后的目标随机接入资源。
以终端在所述退避信息大于第一预设阈值时，确定变更当前随机接入资源为例，若指示信息包括：负载满足高负载条件的随机接入资源的标识信息，终端在退避信息大于第一预设阈值时，在除负载满足高负载条件的随机接入资源之外的随机接入资源中，选择变更后的目标随机接入资源。
以退避变量大于第二预设阈值时，确定变更当前随机接入资源为例，若指示信息包括：负载满足高负载条件的随机接入资源的标识信息，终端在退避变量大于第二预设阈值时，在除负载满足高负载条件的随机接入资源之外的随机接入资源中，选择变更后的目标随机接入资源。
具体地指示方式可以参加前述方法实施例，在此不作赘述。
图6为本申请一实施例提供的终端结构示意图，如图6所示，该终端可以包括：接收模块601、处理模块602，其中：
接收模块601，用于接收网络设备发送的指示信息，所述指示信息用于指示候选随机接入资源的负载信息。
处理模块602，用于根据所述指示信息，选择目标随机接入资源；采用所述目标随机接入资源发起随机接入过程。
可选地，所述指示信息包括：负载满足低负载条件的随机接入资源的标识信息、和/或负载满足高负载条件的随机接入资源的标识信息。
可选地，所述标识信息为下述一项或多项：随机接入资源子集信息、前导标识子集信息、波束标识、同步信号块标识。
一实施例中，指示信息包括：负载满足低负载条件的随机接入资源的标识信息时，处理模块602，具体用于在所述负载满足低负载条件的随机接入资源中，选择所述目标随机接入资源。
另一实施例中，所述指示信息包括：负载满足高负载条件的随机接入资源的标识信息时，处理模块602，具体用于在除所述负载满足高负载条件的随机接入资源之外的随机接入资源中，选择所述目标随机接入资源。
在上述实施例的基础上，接收模块601，用于接收网络设备发送的退避信息。
处理模块602，还用于在所述退避信息满足预设条件时，确定变更当前随机接入资源。
可选地，处理模块602，具体用于在所述退避信息大于第一预设阈值时，确定变更当前随机接入资源。
可选地，处理模块602，具体用于根据所述退避信息生成退避变量；在所述退避变量大于第二预设阈值时，确定变更当前随机接入资源。
进一步地，处理模块602，还用于接收网络设备发送的指示信息，所述指示信息用于指示候选随机接入资源的负载信息。
其中，指示信息包括：负载满足低负载条件的随机接入资源的标识信息、和/或负载满足高负载条件的随机接入资源的标识信息。
图7为本申请一实施例提供的网络设备结构示意图，如图7所示，该网络设备可以包括：确定模块801和发送模块802，其中：
确定模块801，用于确定指示信息，所述指示信息用于指示候选随机接入资源的负载信息。
发送模块802，用于向终端发送所述指示信息。
可选地，所述指示信息包括：负载满足低负载条件的随机接入资源的标识信息、和/或负载满足高负载条件的随机接入资源的标识信息。
可选地，所述标识信息为下述一项或多项：随机接入资源子集信息、前导标识子集信息、波束标识、同步信号块标识。
进一步地，发送模块802，还用于向所述终端发送退避信息。
图8为本申请另一实施例提供的终端结构示意图，该终端包括处理器901，应用处理器，存储器用户接口，以及其他一些元件(包括未示出的电源等设备)。在图8中，上述处理模块可以是所述处理器901，并完成相应的功能。所述发送模块和/或接收模块，可以是图中的无线收发器903，其通过天线完成相应的功能。可以理解图中所示的各个元件只是示意性的，并不是完成本实施例必须的元件。
本实施例中的终端，还可以参照图9所示的设备。作为一个例子，该设备可以完成类似于图8中处理器的功能。在图9中，该设备包括处理器，发送数据处理器，处理器。在图9中，上述处理模块可以是所述处理器110，并完成相应的功能。
所述发送模块可以是图10中发送数据处理器111，所述接收模块可以是图10中接收数据处理器112。虽然图中示出了信道编码器、信道解码器，但是可以理解这些模块并不对本实施例构成限制性说明，仅是示意性的。
图10示出本实施例的另一种形式。处理装置1000中包括调制子***、中央处理子***、周边子***等模块。本实施例中的通信设备可以作为其中的调制子***。具体的，该调制子***可以包括处理器1003，接口1004。其中处理器1003完成上述处理模块的功能，接口1004完成上述发送模块和/或接收模块的功能。作为另一种变形，该调制子***包括存储器1006、处理器1003及存储在存储器上并可在处理器上运行的程序，所述处理器执行所述程序时实现前述实施例所述方法。
需要注意的是，所述存储器1006可以是非易失性的，也可以是易失性的，其位置可以位于调制子***内部，也可以位于处理装置1000中，只要该存储器1006可以连接到所述处理器1003即可。
作为本实施例的另一种形式，提供一种计算机可读存储介质，其上存储有指令该指令被执行时执行前述实施例中所述终端执行的方法。
本实施例中的通信设备为网络设备时，可以参照图11所示的设备，该设备包括处理器1201，应用处理器，存储器用户接口，以及其他一些元件(包括未示出的电源等设备)。在图11中，上述处理模块(选择模块、接入模块、确定模块等)可以是所述处理器1201，并完成相应的功能。所述发送模块和/或接收模块，可以是图中的无线收发器1203，其通过天线完成相应的功能。可以理解图中所示的各个元件只 是示意性的，并不是完成本实施例必须的元件。
本实施例中的通信设备为网络设备时，可以参照图12所示的设备。在图12中，该设备包括处理器，发送数据处理器，处理器。在图12中，上述处理模块可以是所述处理器1301，并完成相应的功能。所述发送模块可以是图12中发送数据处理器1303，所述接收模块可以是图12中接收数据处理器1305。虽然图中示出了信道编码器、信道解码器，但是可以理解这些模块并不对本实施例构成限制性说明，仅是示意性的。
图13示出本实施例的另一种形式。处理装置1400中包括调制子***、中央处理子***、周边子***等模块。本实施例中的网络设备可以作为其中的调制子***。具体的，该调制子***可以包括处理器1403，接口1404。其中处理器1403完成上述处理模块的功能，接口1404完成上述发送模块和/或接收模块的功能。
作为另一种变形，该调制子***包括存储器1406、处理器1403及存储在存储器上并可在处理器上运行的程序，所述处理器执行所述程序时实现上述实施例方法。需要注意的是，所述存储器1406可以是非易失性的，也可以是易失性的，其位置可以位于调制子***内部，也可以位于处理装置1400中，只要该存储器1406可以连接到所述处理器1403即可。
作为本实施例的另一种形式，提供一种计算机可读存储介质，其上存储有指令该指令被执行时执行网络设备所执行的方法。
上述各个实施例中处理器可以是通用处理器、数字信号处理器(Digital Signal Processor，DSP)、专用集成电路(Application Specific Integrated Circuit，ASIC)、现成可编程门阵列(Field Programmable Gate Array，FPGA)或者其他可编程逻辑器件、分立门或者晶体管逻辑器件、分立硬件组件。可以实现或者执行本申请实施例中的公开的各方法、步骤及逻辑框图。通用处理器可以是微处理器或者该处理器也可以是任何常规的处理器等。结合本申请实施例所公开的方法的步骤可以直接体现为硬件译码处理器执行完成，或者用译码处理器中的硬件及软件模块组合执行完成。软件模块可以位于随机存取存储器(Random Access Memory，RAM)、闪存、只读存储器(Read-Only Memory，ROM)、可编程只读存储器或者电可擦写可编程存储器、寄存器等本领域成熟的存储介质中。该存储介质位于存储器1002，处理器1001读取存储器1002中的指令，结合其硬件完成上述方法的步骤。
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。
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***、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。
在本申请所提供的几个实施例中，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***，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，在本申请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，本申请的技术方案本质上或者说对现有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)或处理器(processor)执行本申请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、只读存储器(ROM，Read-Only Memory)、随机存取存储器(RAM，Random Access Memory)、磁碟或者光盘等各种可以存储程序代码的介质。
以上所述，仅为本申请的具体实施方式，但本申请的保护范围并不局限于此，任何熟悉本技术领域的技术人员在本申请揭露的技术范围内，可轻易想到的变化或替换，都应涵盖在本申请的保护范围之内，因此本申请的保护范围应以权利要求的保护范围为准。
本申请还提供的一种实施例中，本实施例提出的方法主要针对如果正在进行一个随机接入(RACH)过程，如果再来一个RACH过程，终端怎么处理的问题。
本实施例中，终端根据当前正在进行的随机接入进度来判断是否停止当前的随机接入而开始新的随机接入(RACH)过程
具体地，比如当前RACH已经执行到冲突解决了(步骤3/4)，即将完成RACH过程，就不需要停止当前的RACH过程。
实施过程中，终端可以结合触发新的RACH的事件优先级和当前进行的RACH的事件的优先级，以及当前RACH的进展，确定是否停止当前的RACH过程。
其中，新的触发事件优先级高，并且正在进行的RACH过程刚开始，可以停止正在进行的RACH过程，开始新的RACH过程。
新的触发事件优先级低，并且正在进行的RACH过程即将完成，可以不停止正在进行的RACH过程，继续进行原有RACH过程
进一步地，可以定义触发事件优先级和RACH进度两个准则的优先级，比如RACH进度准则的优先级更高。
如果有新的事件触发新的RACH过程，并且优先级较高，如果终端不停止当前的RACH过程，终端也需要根据新触发的RACH过程的事件优先级，来调整当前正在进行的RACH过程的优先级，比如，可以根据新的优先级来确定BI的参数。

Claims (39)

  1. 一种随机接入方法，其特征在于，包括：
    终端接收网络设备发送的指示信息，所述指示信息用于指示候选随机接入资源的负载信息；
    所述终端根据所述指示信息，选择目标随机接入资源；
    所述终端采用所述目标随机接入资源发起随机接入过程。
  2. 根据权利要求1所述的方法，其特征在于，所述指示信息包括：负载满足低负载条件的随机接入资源的标识信息、和/或负载满足高负载条件的随机接入资源的标识信息。
  3. 根据权利要求2所述的方法，其特征在于，所述标识信息为下述一项或多项：随机接入资源子集信息、前导标识子集信息、波束标识、同步信号块标识。
  4. 根据权利要求2或3所述的方法，其特征在于，所述指示信息包括：负载满足低负载条件的随机接入资源的标识信息时，
    所述终端根据所述指示信息，选择目标随机接入资源，包括：
    所述终端在所述负载满足低负载条件的随机接入资源中，选择所述目标随机接入资源。
  5. 根据权利要求2或3所述的方法，其特征在于，所述指示信息包括：负载满足高负载条件的随机接入资源的标识信息时，
    所述终端根据所述指示信息，选择目标随机接入资源，包括：
    所述终端在除所述负载满足高负载条件的随机接入资源之外的随机接入资源中，选择所述目标随机接入资源。
  6. 根据权利要求1-5任一项所述的方法，其特征在于，所述终端根据所述指示信息，选择目标随机接入资源之前，还包括：
    所述终端接收网络设备发送的退避信息；
    所述终端在所述退避信息满足预设条件时，确定变更当前随机接入资源。
  7. 一种随机接入方法，其特征在于，包括：
    终端接收网络设备发送的退避信息；
    所述终端根据所述退避信息满足预设条件时，确定变更当前随机接入资源。
  8. 根据权利要求7所述的方法，其特征在于，所述终端根据所述退避信息满足预设条件时，确定变更当前随机接入资源，包括：
    所述终端在所述退避信息大于第一预设阈值时，确定变更当前随机接入资源。
  9. 根据权利要求7所述的方法，其特征在于，所述终端根据所述退避信息满足预设条件时，确定变更当前随机接入资源，包括：
    所述终端根据所述退避信息生成退避变量；
    所述终端在所述退避变量大于第二预设阈值时，确定变更当前随机接入资源。
  10. 根据权利要求7-9任一项所述的方法，其特征在于，所述方法还包括：
    所述终端接收网络设备发送的指示信息，所述指示信息用于指示候选随机接入资源的负载信息。
  11. 根据权利要求10所述的方法，其特征在于，所述指示信息包括：负载满足低负载条件的随机接入资源的标识信息、和/或负载满足高负载条件的随机接入资源的标识信息。
  12. 一种随机接入方法，其特征在于，包括：
    网络设备确定指示信息，所述指示信息用于指示候选随机接入资源的负载信息；
    所述网络设备向终端发送所述指示信息。
  13. 根据权利要求12所述的方法，其特征在于，所述指示信息包括：负载满足低负载条件的随机接入资源的标识信息、和/或负载满足高负载条件的随机接入资源的标识信息。
  14. 根据权利要求13所述的方法，其特征在于，所述标识信息为下述一项或多项：随机接入资源子集信息、前导标识子集信息、波束标识、同步信号块标识。
  15. 根据权利要求12-14任一项所述的方法，其特征在于，所述方法还包括：
    所述网络设备向所述终端发送退避信息。
  16. 一种终端，其特征在于，包括：
    接收模块，用于接收网络设备发送的指示信息，所述指示信息用于指示候选随机接入资源的负载信息；
    处理模块，用于根据所述指示信息，选择目标随机接入资源；采用所述目标随机接入资源发起随机接入过程。
  17. 根据权利要求16所述的终端，其特征在于，所述指示信息包括：负载满足低负载条件的随机接入资源的标识信息、和/或负载满足高负载条件的随机接入资源的标识信息。
  18. 根据权利要求17所述的终端，其特征在于，所述标识信息为下述一项或多项：随机接入资源子集信息、前导标识子集信息、波束标识、同步信号块标识。
  19. 根据权利要求17或18所述的终端，其特征在于，所述指示信息包括：负载满足低负载条件的随机接入资源的标识信息时，
    所述处理模块，具体用于在所述负载满足低负载条件的随机接入资源中，选择所述目标随机接入资源。
  20. 根据权利要求17或18所述的终端，其特征在于，所述指示信息包括：负载满足高负载条件的随机接入资源的标识信息时，
    所述处理模块，具体用于在除所述负载满足高负载条件的随机接入资源之外的随机接入资源中，选择所述目标随机接入资源。
  21. 根据权利要求16-20任一项所述的终端，其特征在于，所述接收模块，还用于接收网络设备发送的退避信息；
    所述处理模块，还用于在所述退避信息满足预设条件时，确定变更当前随机接入资源。
  22. 一种终端，其特征在于，包括：
    接收模块，用于接收网络设备发送的退避信息；
    处理模块，用于根据所述退避信息满足预设条件时，确定变更当前随机接入资源。
  23. 根据权利要求22所述的终端，其特征在于，所述处理模块，具体用于在所述 退避信息大于第一预设阈值时，确定变更当前随机接入资源。
  24. 根据权利要求22所述的终端，其特征在于，所述处理模块，具体用于根据所述退避信息生成退避变量；在所述退避变量大于第二预设阈值时，确定变更当前随机接入资源。
  25. 根据权利要求22-24任一项所述的终端，其特征在于，所述接收模块，还用于接收网络设备发送的指示信息，所述指示信息用于指示候选随机接入资源的负载信息。
  26. 根据权利要求25所述的终端，其特征在于，所述指示信息包括：负载满足低负载条件的随机接入资源的标识信息、和/或负载满足高负载条件的随机接入资源的标识信息。
  27. 一种网络设备，其特征在于，包括：
    处理模块，用于确定指示信息，所述指示信息用于指示候选随机接入资源的负载信息；
    发送模块，用于向终端发送所述指示信息。
  28. 根据权利要求27所述的网络设备，其特征在于，所述指示信息包括：负载满足低负载条件的随机接入资源的标识信息、和/或负载满足高负载条件的随机接入资源的标识信息。
  29. 根据权利要求28所述的网络设备，其特征在于，所述标识信息为下述一项或多项：随机接入资源子集信息、前导标识子集信息、波束标识、同步信号块标识。
  30. 根据权利要求27-29任一项所述的网络设备，其特征在于，所述发送模块，还用于向所述终端发送退避信息。
  31. 一种终端，其特征在于，所述终端包括存储器和一个或多个处理器，所述存储器与所述一个或多个处理器耦合，所述一个或多个处理器用于执行如权利要求1-6任一项所述的随机接入方法。
  32. 一种终端，其特征在于，所述终端包括存储器和一个或多个处理器，所述存储器与所述一个或多个处理器耦合，所述一个或多个处理器用于执行如权利要求7-11任一项所述的随机接入方法。
  33. 一种网络设备，其特征在于，所述网络设备包括存储器和一个或多个处理器，所述存储器与所述一个或多个处理器耦合，所述一个或多个处理器用于执行如权利要求12-15任一项所述的随机接入方法。
  34. 一种计算机可读存储介质，其特征在于，其上存储有指令，当所述指令被计算机设备或处理器执行时，实现权利要求1-6任一项所述的随机接入方法。
  35. 一种计算机可读存储介质，其特征在于，其上存储有指令，当所述指令被计算机设备或处理器执行时，实现权利要求7-11任一项所述的随机接入方法。
  36. 一种计算机可读存储介质，其特征在于，其上存储有指令，当所述指令被计算机设备或处理器执行时，实现权利要求12-15任一项所述的随机接入方法。
  37. 一种程序产品，其特征在于，所述程序产品包括计算机程序，所述计算机程序存储在可读存储介质中，所述计算机程序被至少一个处理器执行以使得终端实施权利要求1-6任一项所述的随机接入方法。
  38. 一种程序产品，其特征在于，所述程序产品包括计算机程序，所述计算机程序存储在可读存储介质中，所述计算机程序被至少一个处理器执行以使得终端实施权利要求7-11任一项所述的随机接入方法。
  39. 一种程序产品，其特征在于，所述程序产品包括计算机程序，所述计算机程序存储在可读存储介质中，所述计算机程序被至少一个处理器执行以使得网络设备实施权利要求12-15任一项所述的随机接入方法。
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