WO2018126991A1 - 接入方法及接入装置 - Google Patents

接入方法及接入装置 Download PDF

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Publication number
WO2018126991A1
WO2018126991A1 PCT/CN2017/119590 CN2017119590W WO2018126991A1 WO 2018126991 A1 WO2018126991 A1 WO 2018126991A1 CN 2017119590 W CN2017119590 W CN 2017119590W WO 2018126991 A1 WO2018126991 A1 WO 2018126991A1
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Prior art keywords
access
data transmission
terminal
equal
specified
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English (en)
French (fr)
Inventor
陈中明
吴昱民
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ZTE Corp
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ZTE Corp
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Priority to EP17890333.2A priority Critical patent/EP3567969A4/en
Publication of WO2018126991A1 publication Critical patent/WO2018126991A1/zh
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W74/00—Wireless channel access
    • H04W74/002—Transmission of channel access control information
    • H04W74/006—Transmission of channel access control information in the downlink, i.e. towards the terminal
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W74/00—Wireless channel access
    • H04W74/002—Transmission of channel access control information
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W28/00—Network traffic management; Network resource management
    • H04W28/02—Traffic management, e.g. flow control or congestion control
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W28/00—Network traffic management; Network resource management
    • H04W28/02—Traffic management, e.g. flow control or congestion control
    • H04W28/0231—Traffic management, e.g. flow control or congestion control based on communication conditions
    • H04W28/0236—Traffic management, e.g. flow control or congestion control based on communication conditions radio quality, e.g. interference, losses or delay
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/0005—Control or signalling for completing the hand-off
    • H04W36/0055—Transmission or use of information for re-establishing the radio link
    • H04W36/0077—Transmission or use of information for re-establishing the radio link of access information of target access point
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/0005—Control or signalling for completing the hand-off
    • H04W36/0083—Determination of parameters used for hand-off, e.g. generation or modification of neighbour cell lists
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W74/00—Wireless channel access
    • 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
    • H04W74/0836—Random access procedures, e.g. with 4-step access with 2-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
    • H04W74/0838—Random access procedures, e.g. with 4-step access using contention-free random access [CFRA]

Definitions

  • the present disclosure relates to the field of communications technologies, and in particular, to an access method and an access device.
  • the user equipment In the Long Term Evolution (LTE) system, the user equipment (User Equipment, UE) in the connected state needs to obtain uplink synchronization and downlink synchronization with the base station before transmitting data to the base station. If the UE performs measurement on a cell, it indicates that downlink synchronization with the base station has been obtained. Otherwise, the UE needs to perform a similar cell search process to obtain downlink synchronization with the base station.
  • the uplink synchronization is implemented by performing a random access procedure (for example, the UE acquires a Time Advance (TA) sent by the base station), and the TA is mainly used by the UE to determine the time at which the data is sent. After the UE acquires the uplink synchronization, the UE starts.
  • TA Time Advance
  • the Time Alignment Timer (TAT), if the UE can receive the time advance TA sent by the base station to the UE before the TAT expires, it is considered that the UE maintains uplink synchronization with the base station, and if the TAT has expired, Receiving the timing advance TA sent by the base station to the UE, the UE considers that the uplink synchronization is lost. If the UE needs to send data to the base station after losing the uplink synchronization, the uplink synchronization is performed again. Since the cell in the LTE system has only one carrier, there is only one TA, and each cell has a global cell identifier (CGI), and the CGI can be sent through a system message.
  • CGI global cell identifier
  • the random access procedure in the LTE system is shown in Figure 1.
  • the random access procedure may be initiated by a physical downlink control channel order (PDCCH order) or a medium access control layer (MAC) of the UE, as shown in step 100 in FIG. 1 , optionally
  • the PDCCH order or the Radio Resource Control (RRC) can allocate a dedicated random access preamble to the UE, so that the random access procedure is a non-collision-based manner, and the dedicated random access preamble can only It is allocated by the base station and can be configured by PDCCH order or handover command. If the dedicated random access preamble is not allocated to the UE, the UE needs to select the random access preamble, and the random access procedure is a contention based method.
  • PDCCH order physical downlink control channel order
  • MAC medium access control layer
  • RRC Radio Resource Control
  • step 100 is not performed, and step 101 is directly executed.
  • Selecting a random access resource by the UE includes selecting a random access preamble and a time-frequency domain resource of a physical random access channel (PRACH).
  • PRACH physical random access channel
  • the conflict-based random access process includes steps 101 through 104, wherein steps 103 and 104 are used to resolve conflicts, and the non-conflict-based process does not need to perform steps 103 and 104.
  • 5G will conduct further technical research on greater throughput, more user connections, lower latency, higher reliability, and lower power consumption, including network-side devices and user terminals.
  • 5G In order to shorten the access delay of 5G, it is necessary to shorten the time of the random access process.
  • the present disclosure provides an access method and an access device, which can shorten the time taken for the random access process and shorten the access delay.
  • the present disclosure provides an access method, which may include:
  • the terminal determines whether the preset access condition is met, and if yes, the terminal and the base station implement a random access procedure by performing two interactions.
  • the disclosure also provides an access device, which may include:
  • a configuration information acquiring unit configured to receive configuration information sent by the base station, and obtain a preset access condition from the configuration information
  • a determining unit configured to determine whether the preset access condition is currently met
  • the access unit is configured to implement a random access procedure by performing two interactions with the base station after the determining unit determines that the preset access condition is currently met.
  • the access method and device provided by the present disclosure determine whether the preset access condition is met by the terminal. If the terminal and the base station implement the random access process through two interactions, the access delay is shortened.
  • FIG. 2a is a flowchart of an access method according to an embodiment of the present invention.
  • FIG. 2b is a flowchart of an access method according to Embodiment 1 of the present invention.
  • FIG. 3 is a flowchart of an access method according to Embodiment 2 of the present invention.
  • FIG. 5 is a flowchart of an access method according to Embodiment 4 of the present invention.
  • FIG. 6 is a flowchart of an access method according to Embodiment 5 of the present invention.
  • FIG. 7 is a structural block diagram of a terminal according to Embodiment 5 of the present invention.
  • An embodiment of the present invention provides an access method. As shown in FIG. 2a, the method may include:
  • step 110 the terminal receives the configuration information sent by the base station, and obtains a preset access condition from the configuration information.
  • step 120 the terminal determines whether the preset access condition is currently met. If yes, the terminal and the base station implement a random access procedure by performing two interactions.
  • the random access procedure includes a collision based random access procedure.
  • the terminal may obtain the configuration information from a system message.
  • the two interactions include that the terminal sends a message to the base station and the base station sends a message to the terminal.
  • An implementation manner of completing the random access process by two interactions is as follows: Step 103 and step 104 shown in FIG. 1 are merged into steps 101 and 102 to complete the random access process, and steps 103 and 104 are merged into
  • the method specifically includes: when performing the step 101, the terminal also performs step 103.
  • the terminal sends the preamble to the base station at the time of transmission time interval 1 (TTI1), and also sends the message 3 (msg3).
  • TTI1 transmission time interval 1
  • msg3 message 3
  • msg3 carries an RRC connection setup request message and terminal identification information, and is sent to the base station.
  • the base station receives the preamble sent by the terminal, and also receives the msg3 sent by the terminal. If the conflict can be resolved, the terminal responds to the msg2, that is, the Random Access Recipse (RAR) message, and responds to the msg4 conflict resolution message.
  • RAR Random Access Recipse
  • the process of completing the random access by two interactions is referred to as a two-step access method.
  • the related random access procedure is called a four-step access method.
  • the method further includes: when the terminal determines that the preset access condition is not met, the terminal and the base station implement the random access process by using more than two interactions.
  • the terminal and the base station implement the random access process by using more than two interactions.
  • an implementation manner of implementing the random access procedure by using more than two interactions is to complete random access by using a four-step access method.
  • determining, by the terminal, whether the preset access conditions are currently met includes:
  • the device determines whether the current network is congested. If the current network is not congested, the preset access condition is met.
  • the terminal can determine whether the current network is congested by receiving a network congestion indication in the system message.
  • determining, by the terminal, whether the preset access conditions are currently met includes:
  • the preset access condition is met.
  • the UE determines whether the signal quality of the serving cell to which the UE initiates access is greater than or equal to a specified signal quality threshold.
  • the specified signal quality threshold may include a first specified signal quality threshold and a second specified signal quality threshold, wherein:
  • the terminal When the terminal needs to re-access the serving cell after the terminal accesses the serving cell, it is determined whether the signal quality of the serving cell is greater than or equal to a second specified signal quality threshold.
  • the first specified signal quality threshold and the second specified signal quality threshold may be the same or different. When the two are the same, only one specified signal quality threshold can be used.
  • determining, by the terminal, whether the preset access conditions are currently met includes:
  • the specified data transmission threshold may include a first specified data transmission threshold and a second specified data transmission threshold, wherein:
  • the terminal When the terminal needs to re-access the serving cell after the terminal accesses the cell, it is determined whether the size of the data to be sent is less than or equal to the second specified data transmission threshold.
  • the first designated data transmission threshold and the second specified data transmission threshold may be the same or different. When the two are the same, you can use only one specified data transfer threshold.
  • determining, by the terminal, whether the preset access conditions are currently met includes:
  • the designated data transmission interval may include a first specified data transmission interval and a second specified data transmission interval, where:
  • a data transmission interval for transmitting data to be transmitted is greater than or equal to a second specified data transmission interval.
  • the first designated data transmission interval and the second specified data transmission interval may be the same or different. When the two are the same, you can use only one specified data transmission interval.
  • determining, by the terminal, whether the preset access conditions are currently met includes:
  • the terminal determines a signalling radio bearer (SRB), a data radio bearer (DRB), an evolved packet system bearer (EPS bearer), and an Evolved Packet System bearer (EPS bearer) corresponding to the data transmitted by the base station.
  • SRB signalling radio bearer
  • DRB data radio bearer
  • EPS bearer evolved packet system bearer
  • EPS bearer Evolved Packet System bearer
  • determining, by the terminal, whether the preset access conditions are currently met includes:
  • the terminal learns that the dedicated preamble is not carried in the message 0, it determines whether the time (such as a time slot or a subframe) for receiving the message 0 satisfies the specified condition, and if the time when the message 0 is received satisfies the specified condition, the terminal satisfies Preset access conditions;
  • the terminal learns that the dedicated preamble is not carried in the message 0, if the message 0 carries the two-step access indication information, the preset access condition is met.
  • determining whether the time when the message 0 is received meets the specified condition includes:
  • the preset access condition is satisfied.
  • the specified value may be 2, 3 or 4, and the like.
  • the values specified here are only examples, and can be set as needed, which is not limited in this application.
  • the above various judgment methods can also be combined. For example, if the network is not congested and the size of the data to be sent is less than or equal to the specified data transmission threshold, the preset access condition is met, or the signal quality of the serving cell that needs to initiate the access is greater than or equal to the specified signal quality threshold. The preset access condition is met when the size of the data to be sent is less than or equal to the specified data transmission threshold.
  • the above combinations are only examples, and other conditions may be combined, which is not limited in this application.
  • the terminal access when the preset access condition is met, the terminal access can be implemented through two interactions, so that the delay of the terminal accessing the 5G system is greatly reduced.
  • the first base station may be a 5G base station or an LTE enhanced base station, and the base station is provided with a cell, which is called a first cell.
  • a 5G base station is taken as an example for description.
  • LTE enhanced base station the process is the same.
  • the terminal resides in the first cell, and the terminal is configured to determine whether the preset access condition is met according to whether the network is congested.
  • the access method provided in this embodiment may include:
  • step 210 the terminal receives a system message of the first cell
  • step 220 the terminal needs to access the first cell, and judges whether the current network is congested according to the received system message. When it is determined that the current network congestion state is not congested and the preset access condition is met, the terminal passes two steps. Access method for random access;
  • the terminal After the terminal successfully accesses the first cell, the terminal obtains that the current network congestion state is congested by using a system message or a dedicated message, such as an RRC reconfiguration message.
  • step 240 when the terminal needs to re-access the first cell, it determines that the current network congestion state is congested, and does not satisfy the preset access condition, and performs random access through the four-step access method.
  • the system information sent by the cell may be received to determine the current network state of the cell.
  • the two-step access method is adopted. Random access is performed.
  • random access is performed through the four-step access method. For example, when the terminal successfully accesses the first cell, the terminal needs to re-access the first cell when the terminal does not perform data interaction with the first cell for a period of time, and the terminal learns the current network of the first cell by using a system message or a dedicated message. If the congestion state is congestion, random access is performed through the four-step access method.
  • the terminal camps in the first cell.
  • the terminal is configured to determine whether the preset access condition is met according to the signal quality of the serving cell to be accessed.
  • step 310 the terminal receives a system message of the first cell, and acquires a first specified signal quality threshold.
  • step 320 when the terminal accesses the first cell, it is determined whether the signal quality of the serving cell (ie, the first cell) that the terminal needs to initiate access is greater than or equal to the first specified signal quality threshold.
  • the signal quality of the serving cell ie, the first cell
  • the preset access condition is met, and two Step access method for random access.
  • step 330 after the terminal successfully accesses the first cell, acquiring a second specified signal quality threshold
  • the second specified signal quality threshold may be obtained by a system message or a dedicated message, such as an RRC reconfiguration message.
  • step 340 the terminal needs to re-access the first cell, and determine whether the signal quality of the serving cell (ie, the first cell) that needs to be accessed is greater than or equal to the second specified signal quality threshold.
  • the terminal performs random access by using a two-step access method.
  • the terminal camps in the first cell.
  • the terminal is configured to determine whether the preset access condition is satisfied by the information of at least one of the size of the data to be transmitted and the transmission mode.
  • the terminal receives a system message of the first cell, and acquires at least one of a first specified data transmission threshold and a mode of transmitting data.
  • the data transmission mode may be the first specified data transmission interval;
  • step 420 the terminal needs to access the first cell to send data, and determine that the size of the data to be sent is less than or equal to the first specified data transmission threshold, and perform random access by using the two-step access method.
  • determining a transmission mode of the data that needs to be sent for example, when the data transmission interval is greater than or equal to the first specified data transmission interval, performing random access by using a two-step access method;
  • step 430 after the terminal successfully accesses the first cell, acquiring at least one of a second designated data transmission threshold and a second designated data transmission interval;
  • the at least one of the second designated data transmission threshold and the second data transmission interval may be acquired by a system message or a dedicated message, such as an RRC reconfiguration message.
  • step 440 when the terminal needs to re-access the first cell, when the data size that needs to be sent is less than or equal to the second specified data transmission threshold, the terminal accesses the random access through the two-step access method; or, determines the current The transmission mode of the data to be transmitted, for example, the data transmission interval is greater than or equal to the second specified data transmission interval, and random access is performed by the two-step access method.
  • the data size that needs to be sent is less than or equal to the second specified data transmission threshold, and the transmission mode of the data that needs to be sent, for example, when the data transmission interval is greater than or equal to the second specified data transmission interval, is Random access is performed by a two-step access method.
  • the terminal camps in the first cell.
  • the terminal is configured to determine whether the preset access condition is met by the configuration of the corresponding radio bearer or other bearer when the data arrives.
  • step 510 the terminal accesses the first cell, and the base station configures the DRB1 for the terminal, and the DRB1 carries configuration information, indicating that the terminal needs to send the data of the DRB1, and can perform random connection through the two-step access method.
  • step 520 data arrives on the DRB1, and the terminal can perform a two-step access method according to the configuration of the current DRB1, and perform random access through the two-step access method.
  • the configuration of the two-step access method may be configured on the DRB, or on the SRB, on the EPS bearer, on the flow, or on the PDU session, and the terminal may correspond to the data arrival.
  • the configuration information of the radio bearer or the configuration information of the corresponding bearer is used to determine whether to initiate the two-step access method.
  • the configuration of the two-step access method may be configured on the flow, and the DRB corresponding to the data arrives.
  • the configuration information of the flow determines whether to initiate the two-step access method, and the judgment of other configurations is similar.
  • the terminal camps in the first cell.
  • the terminal is configured to determine whether the preset access condition is met according to the time when the message 0 is received.
  • step 610 the terminal successfully accesses the first cell, and learns that there is no dedicated preamble in message 0, and the terminal decides whether to perform the two-step access method or the four-step access according to the time of the received message 0. law.
  • the terminal can know whether there is a dedicated preamble in the message 0 through a system message or a dedicated message, for example, through an RRC reconfiguration message.
  • the time at which the message 0 is received may be a TTI (Transmission Time Interval) of the received message 0, or a time slot or a subframe in which the message 0 is received. In this embodiment, it is determined according to the TTI of the received message 0 whether the preset access condition is met.
  • TTI Transmission Time Interval
  • the two-step access method may be performed when the TTI of the received message 0 is an odd number, and the four-step access method is performed when the TTI is an even number.
  • step 620 the terminal receives message 0, there is no dedicated preamble in message 0, and the terminal receives message 0 at TTI3. Since TTI3 is an odd number, a two-step access method is performed.
  • the two-step access method or the four-step access method may also be determined by the indication in the message 0.
  • the message 0 carries the two-step access indication
  • the two-step access method is used. If the two-step access indication is not carried, the four-step access method is used.
  • the terminal may be configured to determine whether to perform the two-step access method or the four-step access method according to whether the received message 0 is a specified value. For example, when the terminal receives the TTI of the message 0 as a specified value, the terminal performs two In the step access method, the four-step access method is performed when the TTI of the message 0 is a non-specified value.
  • the specified value can be 2, 3, 4 or 5, etc. This is just an example, and you can set this value as needed.
  • Figure 7 is a block diagram of a terminal according to an embodiment of the present invention. As shown in Figure 7, the terminal provided by the embodiment of the present invention may include:
  • the configuration information acquiring unit 701 is configured to receive configuration information sent by the base station, and obtain preset access conditions from the configuration information.
  • the determining unit 702 is configured to determine whether the preset access condition is currently met
  • the access unit 703 is configured to implement a random access procedure by performing two interactions with the base station after the determining unit 702 determines that the preset access condition is met.
  • the access unit 703 is further configured to: when the determining unit 702 determines that the preset access condition is not currently met, implementing the random access procedure by using the base station by using more than two interactions.
  • the determining unit 702 is configured to determine whether the preset access condition is currently met by using at least one of the following manners:
  • the dedicated preamble is not carried in the message 0 if it is known that the dedicated preamble is not carried in the message 0 carries the two-step access indication information, the preset access condition is met.
  • the determining unit 702 is configured to:
  • the terminal When the terminal needs to re-access after accessing the serving cell, it is determined whether the signal quality of the serving cell is greater than or equal to a second specified signal quality threshold.
  • the determining unit 702 is configured to:
  • the terminal When the terminal needs to re-access after accessing the cell, it is determined whether the size of the data to be sent is less than or equal to the second specified data transmission threshold.
  • the determining unit 702 is configured to:
  • a data transmission interval for transmitting the data to be transmitted is greater than or equal to a second specified data transmission interval.
  • the determining unit 702 is configured to:

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Abstract

一种接入方法和接入装置。该方法包括：终端接收基站发送的配置信息，从所述配置信息中获取预设接入条件；所述终端判断是否满足所述预设接入条件，如果满足，则所述终端与所述基站通过两次交互实现随机接入过程。

Description

接入方法及接入装置 技术领域
本公开涉及通信技术领域，尤例如涉及一种接入方法及接入装置。
背景技术
长期演进(Long Term Evolution，LTE)系统中，处于连接态的用户设备(User Equipment，UE)给基站发送数据前，需要获得与基站的上行同步和下行同步。其中，如果UE对一个小区执行过测量则表明已获得与基站的下行同步，否则需要UE执行类似小区搜索的过程来获得与基站的下行同步。上行同步通过执行随机接入过程来实现(例如，UE获取到基站发送的时间提前量(Time Advance，TA))，TA主要用途是UE用来确定发送数据的时刻，UE获取上行同步后，启动上行同步定时器(Time Alignment Timer，TAT)，若UE能在TAT超时之前接收到基站发送给UE的时间提前量TA，则认为该UE与该基站之间保持上行同步，如果TAT超时后还没接收到基站发送给UE的时间提前量TA，UE认为失去上行同步。UE失去上行同步后如果还需要给基站发送数据，则重新进行上行同步。由于LTE系统中小区只有一个载波，因此只有一个TA，每个小区都具有全局小区标识(Cell Global Identity，CGI)，可以通过系统消息发送CGI。
LTE系统中的随机接入过程如图1所示。随机接入过程可以由物理下行控制信道信今(Physical Downlink Control Channel order，PDCCH order)或者UE的媒体接入控制层(Medium Access Control，MAC)发起，见图1中的步骤100，可选地，PDCCH order或者无线资源控制(Radio Resource Control，RRC)信今可以为UE分配专用随机接入前导(Random Access Preamble)，使得随机接入过程为非基于冲突的方式，专用随机接入前导只能由基站来分配，可以通过PDCCH order或者切换命令来配置。如果未给UE分配专用随机接入前导，则UE需要选择随机接入前导，此时随机接入过程为基于冲突(Contention based)的方式，该情形下，不执行步骤100，直接执行步骤101。UE选择随机接入资源包括选择随机接入前导和物理随机接入信道(Physical Random Access Channel，PRACH)的时频域资源等。对于非冲突的随机接入过程，没有冲突解决过程，通过网络侧分配专用前导码给终端来实现的。基于冲突的随机接入过 程，如图1所示，包括步骤101至步骤104，其中步骤103和步骤104是用来解决冲突的，非基于冲突的过程不需要执行步骤103和步骤104。
为了满足未来更高、更快、更新的通信需求，业界已经着手展开对未来5G技术的研究。5G将在更大的吞吐量，更多的用户连接，更低时延，更高可靠性以及更低功耗(包括网络侧设备和用户终端)等方面进行进一步的技术研究。为了缩短5G的接入时延，有必要缩短随机接入过程的时间。
发明内容
本公开提供了一种接入方法和接入装置，可以实现缩短随机接入过程耗费的时间，缩短接入时延。
本公开提供了一种接入方法，可以包括：
终端接收基站发送的配置信息，从所述配置信息中获取预设接入条件；
所述终端判断是否满足所述预设接入条件，如果满足，则所述终端与所述基站通过两次交互实现随机接入过程。
本公开还提供一种接入装置，可以包括：
配置信息获取单元，设置为接收基站发送的配置信息，从所述配置信息中获取预设接入条件；
判断单元，设置为判断当前是否满足所述预设接入条件；
接入单元，设置为在所述判断单元判断当前满足所述预设接入条件后，与所述基站通过两次交互实现随机接入过程。
本公开提供的接入方法和装置，通过终端判断当前是否满足预设接入条件，如果满足，则所述终端与基站通过两次交互实现随机接入过程，缩短了接入时延。
附图说明
图1为一种随机接入过程流程图；
图2a为本发明实施例提供的一种接入方法的流程图；
图2b为本发明实施例一提供的接入方法流程图；
图3为本发明实施例二提供的接入方法流程图；
图4为本发明实施例三提供的接入方法流程图；
图5为本发明实施例四提供的接入方法流程图；
图6为本发明实施例五提供的接入方法流程图；
图7为本发明实施例五提供的一种终端的结构框图。
具体实施方式
附图的流程图示出的步骤可以在诸如一组计算机可执行指令的计算机系统中执行。并且，虽然在流程图中示出了逻辑顺序，但是在一些情况下，可以以不同于此处的顺序执行所示出或描述的步骤。
本发明实施例提供一种接入方法，如图2a所示，该方法可以包括：
在步骤110中，终端接收基站发送的配置信息，从所述配置信息中获取预设接入条件；
在步骤120中，所述终端判断当前是否满足所述预设接入条件，如果满足，则所述终端与所述基站通过两次交互实现随机接入过程。该随机接入过程包括基于冲突的随机接入过程。
其中，所述终端可以从系统消息中获取所述配置信息。
其中，所述两次交互包括终端向基站发送一次消息和基站向终端发送一次消息。一种通过两次交互完成随机接入过程的实现方式为：将图1所示的步骤103和步骤104合并到步骤101和步骤102中，完成随机接入过程，将步骤103和步骤104合并到步骤101和步骤102中，具体包括：终端在执行101步骤的同时，也执行步骤103，比如终端在传输时间间隔1(TTI1)时刻发送了前导码给基站，同时，也将消息3(msg3)，比如msg3携带了RRC连接建立请求消息以及终端标识信息，发送给基站。基站接收到终端发送的前导码，同时也接收到终端发送的msg3，如果能解决冲突，则给终端回应msg2即随机接入响应(Random Access Reaponse，RAR)消息，同时回应msg4即冲突解决消息。
后续实施例中为了叙述方便，将两次交互完成随机接入过程称为两步接入法。相关的随机接入过程称为四步接入法。
可选地，所述方法还包括：所述终端判断当前不满足所述预设接入条件时，则所述终端与基站通过大于两次交互实现所述随机接入过程。例如，一种大于两次交互实现所述随机接入过程实现方式为，通过四步接入法完成随机接入。
可选地，所述终端判断当前是否满足预设接入条件包括：
判断当前网络是否拥塞，如果当前网络不拥塞，则满足所述预设接入条件；其中，终端可以通过接收系统消息中的网络拥塞指示判断当前网络是否拥塞。
可选地，所述终端判断当前是否满足预设接入条件包括：
判断需要发起接入的服务小区的信号质量是否大于或等于指定信号质量门限，如果大于或等于指定信号质量门限，则满足所述预设接入条件。
例如，UE判断UE发起接入的服务小区的信号质量是否大于或等于指定的信号质量门限。
其中，该指定信号质量门限可以包括第一指定信号质量门限和第二指定信号质量门限，其中：
当所述终端当前驻留但未接入所述服务小区时，判断所述服务小区的信号质量是否大于或等于第一指定信号质量门限；
当所述终端已接入所述服务小区后，需要重新接入所述服务小区时，判断所述服务小区的信号质量是否大于或等于第二指定信号质量门限。
其中，第一指定信号质量门限和第二指定信号质量门限可以相同或不同。当二者相同时，可以只使用一个指定信号质量门限。
可选地，所述终端判断当前是否满足预设接入条件包括：
判断终端需要发送的数据大小是否小于或等于指定数据传输门限，如果小于或等于所述指定数据传输门限，则满足所述预设接入条件；
其中，该指定数据传输门限可以包括第一指定数据传输门限和第二指定数据传输门限，其中：
当所述终端当前驻留但未接入所述服务小区时，判断需要发送的数据大小是否小于或等于第一指定数据传输门限；
当所述终端已接入小区后，需要重新接入所述服务小区时，判断需要发送的数据大小是否小于或等于第二指定数据传输门限。
其中，第一指定数据传输门限和第二指定数据传输门限可以相同或不同。当二者相同时，可以只使用一个指定数据传输门限。
可选地，所述终端判断当前是否满足预设接入条件包括：
判断用于传输需要发送的数据的数据传输间隔是否大于或等于指定数据传输间隔，如果大于或等于所述指定数据传输间隔，则满足所述预设接入条件。
其中，该指定数据传输间隔可以包括第一指定数据传输间隔和第二指定数据传输间隔，其中：
当所述终端当前驻留但未接入所述服务小区时，判断用于传输需要发送的数据的数据传输间隔是否大于或等于第一指定数据传输间隔；
当所述终端已接入所述服务小区后，需要重新接入所述服务小区时，判断用于传输需要发送的数据的数据传输间隔是否大于或等于第二指定数据传输间隔。
其中，所述第一指定数据传输间隔和第二指定数据传输间隔可以相同或不同。当二者相同时，可以只使用一个指定数据传输间隔。
可选地，所述终端判断当前是否满足预设接入条件包括：
所述终端判断基站发送的数据到达时对应的信今无线承载(Signaling Radio Bearers，SRB)、数据无线承载(Data Radio Bearer，DRB)、演进的分组系统承载(Evolved Packet System bearer，EPS bearer)、流(flow)或分组数据单元(Packet Data Unit，PDU)会话(session)的配置信息中是否支持两步接入，如果支持，则满足所述预设接入条件。
可选地，所述终端判断当前是否满足预设接入条件包括：
所述终端获知消息0中未携带专用前导码时，判断接收所述消息0的时间(比如时隙或子帧)是否满足指定条件，如果接收所述消息0的时间满足指定条件，则满足所述预设接入条件；
或者，所述终端获知消息0中未携带专用前导码时，如果所述消息0中携带两步接入指示信息，则满足所述预设接入条件。
可选地，判断接收所述消息0的时间是否满足指定条件包括：
判断接收所述消息0的时间是否为奇数，如果是，则满足所述预设接入条件；
或者，判断接收所述消息0的时间是否为偶数，如果是，则满足所述预设接入条件；
或者，判断接收所述消息0的时间是否为指定值，如果是，则满足所述预设接入条件。比如，所述指定值可以是2，3或4等。此处指定值仅为示例，可以根据需要设定，本申请对此不作限定。
上述多种判断方式也可以进行组合。比如，同时满足网络不拥塞以及需要发送的数据大小小于或等于指定数据传输门限时，才满足预设接入条件，或者，需要发起接入的服务小区的信号质量大于或等于指定信号质量门限并且需要发送的数据大小小于或等于指定数据传输门限时才满足预设接入条件。上述组合仅为示例，也可以将其他条件进行组合，本申请对此不作限定。
采用本发明实施例提供的接入方法，在满足预设接入条件时，可以通过两 次交互实现终端接入，从而使得终端接入5G系统的时延大大缩小。
以下实施例中，第一基站可以是5G基站或者LTE增强型基站，该基站设置有一个小区，称为第一小区。以下实施例中以5G基站为例进行说明，对于LTE增强型基站，过程一样。
实施例一
终端在第一小区中驻留，终端被配置为根据网络是否拥塞来判断是否满足预设接入条件。如图2b所示，本实施例提供的接入方法可以包括：
在步骤210中，终端接收第一小区的系统消息；
在步骤220中，所述终端需要接入第一小区，根据接收的系统消息判断当前网络是否拥塞，当判断出当前网络的拥塞状态为不拥塞，满足预设接入条件时，则通过两步接入法进行随机接入；
在步骤230中，所述终端成功接入所述第一小区后，通过系统消息或专用消息比如RRC重配消息获知当前网络的拥塞状态为拥塞；
在步骤240中，所述终端需要重新接入第一小区时，判断当前网络的拥塞状态为拥塞，不满足预设接入条件，则通过四步接入法进行随机接入。
例如，无论终端是否接入了第一小区，都可以通过接收该小区发送的系统消息来判断该小区当前的网络状态，当第一小区当前的网络状态为不拥塞时，通过两步接入法进行随机接入，当第一小区当前的网络状态为拥塞时，通过四步接入法进行随机接入。再例如，当终端成功接入第一小区后，由于一段时间内未与第一小区进行数据交互，使得终端需要重新接入第一小区时，终端通过系统消息或专用消息获知第一小区当前网络的拥塞状态为拥塞，则通过四步接入法进行随机接入。
实施例二
终端在第一小区中驻留。终端被配置为根据将要接入的服务小区的信号质量来判断是否满足预设接入条件。
如图3所示，在步骤310中，终端接收第一小区的系统消息，获取第一指定信号质量门限；
步骤320中，所述终端接入所述第一小区时，判断所述终端需要发起接入的服务小区(即所述第一小区)的信号质量是否大于或等于所述第一指定信号 质量门限，本实施例中，终端需要接入所述第一小区，且所述第一小区的信号质量大于或等于所述第一指定信号质量门限时，则满足所述预设接入条件，通过两步接入法进行随机接入。
在步骤330中，所述终端成功接入所述第一小区后，获取第二指定信号质量门限；
其中，可以通过系统消息或专用消息比如RRC重配消息获取所述第二指定信号质量门限。
在步骤340中，所述终端需要重新接入所述第一小区，判断需要接入的服务小区(即第一小区)的信号质量是否大于或等于所述第二指定信号质量门限，本实施例中，所述第一小区的信号质量大于或等于所述第二指定信号质量门限时，所述终端通过两步接入法进行随机接入。
实施例三
终端在第一小区中驻留。终端被配置为通过需要发送的数据的大小和传输模式中的至少一中信息来判断是否满足预设接入条件。
如图4所示，在步骤410中，终端接收第一小区的系统消息，获取第一指定数据传输门限和传输数据的模式中的至少一个。例如，数据的传输模式可以为第一指定数据传输间隔；
在步骤420中，终端需要接入第一小区来发送数据，判断当前需要发送的数据的大小小于或等于所述第一指定数据传输门限时，通过两步接入法进行随机接入。
或者，判断当前需要发送的数据的传输模式，如数据传输间隔大于或等于所述第一指定数据传输间隔时，通过两步接入法进行随机接入；
在步骤430中，终端成功接入第一小区后，获取第二指定数据传输门限和第二指定数据传输间隔中的至少一个；
其中，可以通过系统消息或专用消息比如RRC重配消息获取所述第二指定数据传输门限和第二数据传输间隔中的至少一个。
在步骤440中，终端需要重新接入第一小区时，判断当前需要发送的数据大小小于或等于所述第二指定数据传输门限时，通过两步接入法进行随机接入；或者，判断当前需要发送的数据的传输模式比如数据传输间隔大于或等于所述第二指定数据传输间隔，通过两步接入法进行随机接入。
当然，也可以判断当前需要发送的数据大小小于或等于所述第二指定数据传输门限，且当前需要发送的数据的传输模式比如数据传输间隔大于或等于所述第二指定数据传输间隔时，才通过两步接入法进行随机接入。
实施例四
终端在第一小区中驻留。终端被配置为通过数据到达时对应的无线承载或其他承载的配置来判断是否满足预设接入条件。
如图5所示，在步骤510中，终端接入第一小区，基站给终端配置了DRB1，且该DRB1携带配置信息，指示终端需要发送DRB1的数据时可以通过两步接入法进行随机接入。
在步骤520中，DRB1上有数据到达，终端根据当前DRB1的配置，可以执行两步接入法，通过两步接入法进行随机接入。
上述实施例中，可以执行两步接入法的配置可以是配置在DRB上的，也可以配置在SRB上，、EPS bearer上，、flow上或者PDU session上，终端可以根据数据到达时对应的无线承载的相关配置信息或者对应的其他承载的配置信息来决定是否发起两步接入法，比如，可以执行两步接入法的配置可以是配置在flow上的，则根据数据到达的DRB对应的flow的相关配置信息，来决定是否发起两步接入法，其他配置的判断类似。
实施例五
终端在第一小区中驻留。终端被配置为根据接收消息0的时间来判断是否满足预设接入条件。
如图6所示，在步骤610中，终端成功接入第一小区，获知消息0中没有专用前导码，则终端根据接收的消息0的时间来决定执行两步接入法还是四步接入法。
其中，终端可以通过系统消息或专用消息，比如通过RRC重配消息，获知消息0中是否有专用前导码。
其中，接收消息0的时间可以是接收消息0的TTI(Transmission Time Interval，传输时间间隔)，或者，接收消息0的时隙或子帧等。在本实施例中，根据接收的消息0的TTI来判断是否满足预设接入条件。
本实施例中，可以是接收消息0的TTI为奇数时执行两步接入法，TTI为偶 数时执行四步接入法。
在步骤620中，终端收到消息0，消息0中没有专用前导码，且终端在TTI3收到消息0，由于TTI3为奇数，则执行两步接入法。
上述步骤610中，也可以通过消息0中的指示来决定执行两步接入法还是四步接入法。当消息0中携带两步接入指示时，使用两步接入法，如果不携带两步接入指示，则使用四步接入法。
上述步骤610中，也可以配置为：终端根据接收的消息0是否为指定值来决定执行两步接入法还是四步接入法，例如，终端接收消息0的TTI为指定值时，执行两步接入法，消息0的TTI为非指定值时执行四步接入法。指定值可以为2，3，4或5等。此处仅为示例，可以根据需要设定该指定值。
实施例六
图7为本发明实施例提供的终端框图，如图7所示，本发明实施例提供的终端可以包括：
配置信息获取单元701，设置为接收基站发送的配置信息，从所述配置信息中获取预设接入条件；
判断单元702，设置为判断当前是否满足所述预设接入条件；
接入单元703，设置为在所述判断单元702判断满足所述预设接入条件后，与所述基站通过两次交互实现随机接入过程。
可选地，所述接入单元703还设置为，当所述判断单元702判断当前不满足所述预设接入条件时，与所述基站通过大于两次交互实现所述随机接入过程。
可选地，所述判断单元702是设置为通过以下至少一种方式判断当前是否满足预设接入条件：
判断当前网络是否拥塞，如果当前网络不拥塞，则满足所述预设接入条件；
判断需要发起接入的服务小区的信号质量是否大于或等于指定信号质量门限，如果大于或等于指定信号质量门限，则满足所述预设接入条件；
判断需要发送的数据大小是否小于或等于指定数据传输门限，如果小于或等于所述指定数据传输门限，则满足所述预设接入条件；
判断需要发送的数据传输间隔是否大于或等于指定数据传输间隔，如果大于或等于所述指定数据传输间隔，则满足所述预设接入条件；
判断数据到达时对应的信今无线承载、数据无线承载、演进的分组系统承 载、流或分组数据单元会话的配置信息中是否支持两步接入，如果支持，则满足所述预设接入条件；
获知消息0中未携带专用前导码时，判断接收所述消息0的时间是否满足指定条件，如果满足，则满足所述预设接入条件；
获知消息0中未携带专用前导码时，如果所述消息0中携带两步接入指示信息，则满足所述预设接入条件。
可选地，所述判断单元702是设置为：
当所述终端当前驻留但未接入所述服务小区时，判断所述服务小区的信号质量是否大于或等于第一指定信号质量门限；
当所述终端已接入所述服务小区后需要重新接入时，判断所述服务小区的信号质量是否大于或等于第二指定信号质量门限。
可选地，所述判断单元702是设置为：
当所述终端当前驻留但未接入小区时，判断需要发送的数据大小是否小于或等于第一指定数据传输门限；
当所述终端已接入小区后需要重新接入时，判断需要发送的数据大小是否小于或等于第二指定数据传输门限。
可选地，所述判断单元702是设置为：
当所述终端当前驻留但未接入小区时，判断用于传输所述需要发送的数据的数据传输间隔是否大于或等于第一指定数据传输间隔；
当所述终端已接入小区后需要重新接入时，判断用于传输所述需要发送的数据的数据传输间隔是否大于或等于第二指定数据传输间隔。
可选地，所述判断单元702是设置为：
判断接收所述消息0的时间是否为奇数，如果是，则满足所述预设接入条件；
或者，判断接收所述消息0的时间是否为偶数，如果是，则满足所述预设接入条件；
或者，判断接收所述消息0的时间是否为指定值，如果是，则满足所述预设接入条件。

Claims (14)

  1. 一种接入方法，包括：
    终端接收基站发送的配置信息，从所述配置信息中获取预设接入条件；
    所述终端判断是否满足所述预设接入条件，如果满足，则所述终端与所述基站通过两次交互实现随机接入过程。
  2. 如权利要求1所述的方法，其中，所述终端判断是否满足所述预设接入条件之后还包括：当所述终端判断不满足所述预设接入条件时，则所述终端与所述基站通过大于两次交互实现所述随机接入过程。
  3. 如权利要求1所述的方法，其中，所述终端判断是否满足预设接入条件包括以下至少之一：
    判断网络是否拥塞，如果网络不拥塞，则满足所述预设接入条件；
    判断需要发起接入的服务小区的信号质量是否大于或等于指定信号质量门限，如果大于或等于指定信号质量门限，则满足所述预设接入条件；
    判断需要发送的数据大小是否小于或等于指定数据传输门限，如果小于或等于所述指定数据传输门限，则满足所述预设接入条件；
    判断用于传输所述需要发送的数据的数据传输间隔是否大于或等于指定数据传输间隔，如果大于或等于所述指定数据传输间隔，则满足所述预设接入条件；
    判断数据到达时对应的信令无线承载、数据无线承载、演进的分组系统承载、流或分组数据单元会话的配置信息中是否支持两步接入，如果支持，则满足所述预设接入条件；
    所述终端获知消息0中未携带专用前导码时，判断接收所述消息0的时间是否满足指定条件，如果满足，则满足所述预设接入条件；
    所述终端获知消息0中未携带专用前导码时，如果所述消息0中携带两步接入指示信息，则满足所述预设接入条件。
  4. 如权利要求3所述的方法，其中，所述判断发起接入的服务小区的信号质量是否大于或等于指定信号质量门限包括：
    当所述终端驻留但未接入所述服务小区时，判断所述服务小区的信号质量是否大于或等于第一指定信号质量门限；
    当所述终端已接入所述服务小区后，需要重新接入所述服务小区时，判断所述服务小区的信号质量是否大于或等于第二指定信号质量门限。
  5. 如权利要求3所述的方法，其中，所述判断需要发送的数据大小是否小 于或等于指定数据传输门限包括：
    当所述终端驻留但未接入所述服务小区时，判断需要发送的数据大小是否小于或等于第一指定数据传输门限；
    当所述终端已接入小区后，需要重新接入所述服务小区时，判断需要发送的数据大小是否小于或等于第二指定数据传输门限。
  6. 如权利要求3所述的方法，其中，所述判断用于传输所述需要发送的数据的数据传输间隔是否大于或等于指定数据传输间隔包括：
    当所述终端驻留但未接入所述服务小区时，判断用于传输所述需要发送的数据的数据传输间隔是否大于或等于第一指定数据传输间隔；
    当所述终端已接入小区后，需要重新接入所述服务小区时，判断用于传输所述需要发送的数据的数据传输间隔是否大于或等于第二指定数据传输间隔。
  7. 如权利要求3所述的方法，其中，所述判断接收所述消息0的时间是否满足指定条件包括以下之一：
    判断接收所述消息0的时间是否为奇数，如果是，则满足所述预设接入条件；
    判断接收所述消息0的时间是否为偶数，如果是，则满足所述预设接入条件；
    判断接收所述消息0的时间是否为指定值，如果是，则满足所述预设接入条件。
  8. 一种接入装置，包括：
    配置信息获取单元，设置为接收基站发送的配置信息，从所述配置信息中获取预设接入条件；
    判断单元，设置为判断是否满足所述预设接入条件；
    接入单元，设置为在所述判断单元判断满足所述预设接入条件后，与所述基站通过两次交互实现随机接入过程。
  9. 如权利要求8所述的接入装置，其中，所述接入单元还设置为，当所述判断单元判断不满足所述预设接入条件时，与所述基站通过大于两次交互实现所述随机接入过程。
  10. 如权利要求8所述的接入装置，其中，所述判断单元是设置为通过以下至少之一判断是否满足预设接入条件：
    判断网络是否拥塞，如果网络不拥塞，则满足所述预设接入条件；
    判断需要发起接入的服务小区的信号质量是否大于或等于指定信号质量门限，如果大于或等于指定信号质量门限，则满足所述预设接入条件；
    判断需要发送的数据大小是否小于或等于指定数据传输门限，如果小于或等于所述指定数据传输门限，则满足所述预设接入条件；
    判断需要发送的数据传输间隔是否大于或等于指定数据传输间隔，如果大于或等于所述指定数据传输间隔，则满足所述预设接入条件；
    判断数据到达时对应的信令无线承载、数据无线承载、演进的分组系统承载、流或分组数据单元会话的配置信息中是否支持两步接入，如果支持，则满足所述预设接入条件；
    获知消息0中未携带专用前导码时，判断接收所述消息0的时间是否满足指定条件，如果满足，则满足所述预设接入条件；
    获知消息0中未携带专用前导码时，如果所述消息0中携带两步接入指示信息，则满足所述预设接入条件。
  11. 如权利要求10所述的装置，其中，所述判断单元是设置为：
    当终端驻留但未接入所述服务小区时，判断所述服务小区的信号质量是否大于或等于第一指定信号质量门限；
    当所述终端已接入所述服务小区后需要重新接入时，判断所述服务小区的信号质量是否大于或等于第二指定信号质量门限。
  12. 如权利要求10所述的装置，其中，所述判断单元是设置为：
    当终端驻留但未接入小区时，判断需要发送的数据大小是否小于或等于第一指定数据传输门限；
    当所述终端已接入小区后需要重新接入时，判断需要发送的数据大小是否小于或等于第二指定数据传输门限。
  13. 如权利要求10所述的装置，其中，所述判断单元是设置为：
    当终端驻留但未接入小区时，判断用于传输所述需要发送的数据的数据传输间隔是否大于或等于第一指定数据传输间隔；
    当所述终端已接入小区后需要重新接入时，判断用于传输所述需要发送的数据的数据传输间隔是否大于或等于第二指定数据传输间隔。
  14. 如权利要求10所述的装置，其中，所述判断单元是设置为通过以下之一判断接收所述消息0的时间是否满足指定条件：
    判断接收所述消息0的时间是否为奇数，如果是，则满足所述预设接入条 件；
    判断接收所述消息0的时间是否为偶数，如果是，则满足所述预设接入条件；
    判断接收所述消息0的时间是否为指定值，如果是，则满足所述预设接入条件。
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