CN111405675A - Random access method, terminal and network equipment - Google Patents
Random access method, terminal and network equipment Download PDFInfo
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- CN111405675A CN111405675A CN201910000965.3A CN201910000965A CN111405675A CN 111405675 A CN111405675 A CN 111405675A CN 201910000965 A CN201910000965 A CN 201910000965A CN 111405675 A CN111405675 A CN 111405675A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W74/00—Wireless channel access, e.g. scheduled or random access
- H04W74/002—Transmission of channel access control information
- H04W74/004—Transmission of channel access control information in the uplink, i.e. towards network
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W74/00—Wireless channel access, e.g. scheduled or random access
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W74/00—Wireless channel access, e.g. scheduled or random access
- H04W74/002—Transmission of channel access control information
- H04W74/006—Transmission of channel access control information in the downlink, i.e. towards the terminal
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W74/00—Wireless channel access, e.g. scheduled or random access
- H04W74/08—Non-scheduled or contention based access, e.g. random access, ALOHA, CSMA [Carrier Sense Multiple Access]
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W74/00—Wireless channel access, e.g. scheduled or random access
- H04W74/08—Non-scheduled or contention based access, e.g. random access, ALOHA, CSMA [Carrier Sense Multiple Access]
- H04W74/0833—Non-scheduled or contention based access, e.g. random access, ALOHA, CSMA [Carrier Sense Multiple Access] using a random access procedure
Abstract
The embodiment of the invention provides a random access method, a terminal and network equipment, wherein the method at the terminal side comprises the following steps: receiving random access conditions of a two-step random access process or a four-step random access process sent by network equipment; when the random access condition meets the access condition of the two-step random access process, performing random access according to the two-step random access process; and when the random access condition meets the access condition of the four-step random access process, performing random access according to the four-step random access process. Embodiments of the present invention allow a terminal to initiate a two-step RACH or to switch from a two-step RACH to a four-step RACH.
Description
Technical Field
The present invention relates to the field of communications technologies, and in particular, to a random access method, a terminal, and a network device.
Background
Considering that L BT (L isten before talk) operation is performed before each data transmission of the UE and the base station, the number of L BT performing steps can be reduced to two steps, thereby reducing the overall time delay of random access.
The current development discusses that four-step RACH (random access procedure) can be supported, all scenarios applicable to the existing four-step RACH can be applied, and the possibility of applying to the licensed band in the future is kept, such as UR LL C (ultra-reliable low latency communications), and what contents may be carried by the messages in the two-step RACH respectively, but the condition for UE (terminal) to initiate two-step RACH and four-step RACH and how to switch between the two mechanisms have not been mentioned yet.
Disclosure of Invention
The invention provides a random access method, a terminal and network equipment. So that the terminal can initiate a two-step RACH or switch from a two-step RACH to a four-step RACH.
To solve the above technical problem, an embodiment of the present invention provides the following solutions:
a random access method is applied to a terminal, and the method comprises the following steps:
receiving random access conditions of a two-step random access process or a four-step random access process sent by network equipment;
when the random access condition meets the access condition of the two-step random access process, performing random access according to the two-step random access process;
and when the random access condition meets the access condition of the four-step random access process, performing random access according to the four-step random access process.
The receiving of the random access condition of the two-step random access procedure or the four-step random access procedure sent by the network device includes:
receiving indication information sent by network equipment, wherein the indication information is used for indicating a terminal to carry out random access according to a two-step random access process or a four-step random access process; or
Receiving random access configuration information sent by a network device, wherein the random access configuration information comprises: and the terminal performs threshold of parameters of the two-step random access process.
The threshold comprises at least one of the distance between the terminal and the network equipment, reference signal received power RSRP, reference signal received quality RSRQ, signal-to-noise-and-interference ratio SINR, received signal strength indication RSSI, listen-before-send L BT success rate, listen-before-send L BT failure rate and channel occupancy threshold.
When the random access condition meets the access condition of the two-step random access process, performing random access according to the two-step random access process, wherein the random access process comprises the following steps:
and when the indication information indicates that the terminal accesses according to the two-step random access process, the terminal performs random access according to the two-step random access process.
When the random access condition meets the access condition of the two-step random access process, performing random access according to the two-step random access process, wherein the random access process comprises the following steps:
and when the parameter for random access measured by the terminal meets the threshold of the parameter of the two-step random access process, performing random access according to the two-step random access process.
When the random access condition meets the access condition of the four-step random access process, performing random access according to the four-step random access process comprises:
and when the two-step random access process is unsuccessful, performing random access according to the four-step random access process.
When the two-step random access process is unsuccessful, performing random access according to the four-step random access process, wherein the method comprises the following steps:
when the terminal exceeds a preset time period after the random access request sent in the two-step random access process is carried out, and the random access response fed back by the network equipment is not received, carrying out random access according to the four-step random access process; alternatively, the first and second electrodes may be,
and when the number of times of the random access request message sent in the two-step random access process by the terminal exceeds a preset number of times and no random access response fed back by the network equipment is received, performing random access according to the four-step random access process.
When the two-step random access process is unsuccessful, performing random access according to the four-step random access process, wherein the method comprises the following steps:
and after the terminal sends the random access request in the two-step random access process, if a random access response fed back by the network equipment is received and the content of the random access response is not matched or matched with the content of the random access request or the random access response is not sent to the terminal, the terminal carries out random access according to the four-step random access process.
Wherein, the random access is performed according to the four-step random access process, which comprises the following steps:
if the content of the first message in the random access response is the same as that of the random access response message of the four-step random access process and the content of the second message is different from that of the contention resolution message of the four-step random access process, the terminal sends an MSG3 or a Radio Resource Control (RRC) establishment request or a Radio Resource Control (RRC) connection establishment request or a scheduling transmission message in the four-step random access process;
and if the content of the first message in the random access response is different from the random access response message of the four-step random access process, the terminal sends a random access request message in the four-step random access process.
Wherein, the indication information or the random access configuration information sent by the network device is received through a handover command or a radio resource control RRC reconfiguration command.
The embodiment of the invention also provides a random access method, which is applied to network equipment and comprises the following steps:
sending the random access conditions of the two-step random access process or the four-step random access process to the terminal; enabling the terminal to carry out two-step random access process according to the random access conditions of the two-step random access process; and performing the four-step random access process according to the random access conditions of the four-step random access process.
Wherein, sending the random access condition of the two-step random access process or the four-step random access process to the terminal includes:
sending indication information to a terminal, wherein the indication information is used for indicating the terminal to carry out random access according to a two-step random access process or a four-step random access process; or
Sending random access configuration information to a terminal, wherein the random access configuration information comprises: and the terminal performs threshold of parameters of the two-step random access process.
And sending the indication information or the random access configuration information to the terminal through a switching command or a Radio Resource Control (RRC) reconfiguration command.
An embodiment of the present invention further provides a terminal, including:
the transceiver is used for receiving the random access conditions of the two-step random access process or the four-step random access process sent by the network equipment;
a processor, configured to perform random access according to the two-step random access procedure when the random access condition satisfies an access condition of the two-step random access procedure; and when the random access condition meets the access condition of the four-step random access process, performing random access according to the four-step random access process.
Wherein the transceiver is specifically configured to: receiving indication information sent by network equipment, wherein the indication information is used for indicating a terminal to carry out random access according to a two-step random access process or a four-step random access process; or receiving random access configuration information sent by a network device, where the random access configuration information includes: and the terminal performs threshold of parameters of the two-step random access process.
The threshold comprises at least one of the distance between the terminal and the network equipment, reference signal received power RSRP, reference signal received quality RSRQ, signal-to-noise-and-interference ratio SINR, received signal strength indication RSSI, listen-before-send L BT success rate, listen-before-send L BT failure rate and channel occupancy threshold.
An embodiment of the present invention further provides a network device, including:
a transceiver for transmitting a random access condition of the two-step random access procedure or the four-step random access procedure to the terminal; enabling the terminal to carry out two-step random access process according to the random access conditions of the two-step random access process; and performing the four-step random access process according to the random access conditions of the four-step random access process.
Wherein the transceiver is specifically configured to: sending indication information to a terminal, wherein the indication information is used for indicating the terminal to carry out random access according to a two-step random access process or a four-step random access process; or sending random access configuration information to the terminal, wherein the random access configuration information comprises: and the terminal performs threshold of parameters of the two-step random access process.
An embodiment of the present invention further provides a communication device, including: a processor, a memory storing a computer program which, when executed by the processor, performs the method as described above.
Embodiments of the present invention also provide a computer-readable storage medium including instructions that, when executed on a computer, cause the computer to perform the method as described above.
The scheme of the invention at least comprises the following beneficial effects:
according to the scheme of the invention, the random access conditions of the two-step random access process or the four-step random access process sent by the network equipment are received; when the random access condition meets the access condition of the two-step random access process, performing random access according to the two-step random access process; and when the random access condition meets the access condition of the four-step random access process, performing random access according to the four-step random access process. So that the terminal can initiate a two-step RACH or switch from a two-step RACH to a four-step RACH.
Drawings
FIG. 1 is a four-step random access procedure;
FIG. 2 is a two-step random access procedure;
fig. 3 is a flowchart illustrating a random access method at a terminal side according to the present invention;
FIG. 4 is a block diagram of a terminal according to the present invention;
fig. 5 is a schematic diagram of a network device according to the present invention.
Detailed Description
Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art.
As shown in fig. 3, an embodiment of the present invention provides a random access method, which is applied to a terminal, and the method includes:
Wherein, the step 31 specifically comprises: step 311, receiving indication information sent by the network device, where the indication information is used to indicate the terminal to perform random access according to the two-step random access procedure or the four-step random access procedure; in this step 311, the indication information sent by the network device, such as an RRC (radio resource control) signaling, may be received through a handover command or a radio resource control RRC reconfiguration command, and the indication information may be represented by bits; for example, 1 indicates that the terminal performs random access according to a two-step random access procedure, and 0 indicates that the terminal performs random access according to a four-step random access procedure;
correspondingly, in the step 32, when the random access condition satisfies the access condition of the two-step random access procedure, performing random access according to the two-step random access procedure includes:
and when the indication information indicates that the terminal accesses according to the two-step random access process, the terminal performs random access according to the two-step random access process.
In an embodiment of the present invention, the step 31 may also include:
step 312, receiving random access configuration Information sent by the network device, where the random access configuration Information includes a threshold of parameters for the terminal to perform two-step random access process, where the threshold includes at least one of a distance between the terminal and the network device, an interference parameter, a listen-before-send L BT success rate, a listen-before-send L BT failure rate, and a channel occupancy threshold, in step 312, the random access configuration Information may be received through a handover command or a radio resource control RRC reconfiguration command, or of course, the random access configuration Information may be broadcast through an SIB (System Information Blocks).
The terminal-to-network device interference parameter may be RSSI (Received Signal Strength Indication), RSRP (Reference Signal Receiving Power), RSRQ (Reference Signal Receiving Quality), or SINR (Signal to interference plus Noise Ratio).
Correspondingly, in the step 32, when the random access condition satisfies the access condition of the two-step random access procedure, performing random access according to the two-step random access procedure includes:
and when the parameter for random access measured by the terminal meets the threshold of the parameter of the two-step random access process, performing random access according to the two-step random access process.
In a specific embodiment of the present invention, in the step 32, when the random access condition satisfies an access condition of a four-step random access procedure, performing random access according to the four-step random access procedure includes: and when the two-step random access process is unsuccessful, performing random access according to the four-step random access process.
Specifically, when a preset time period is exceeded after the terminal performs the random access request sent in the two-step random access process and a random access response fed back by the network device is not received, performing random access according to the four-step random access process; alternatively, the first and second electrodes may be,
and when the number of times of the random access request message sent in the two-step random access process by the terminal exceeds a preset number of times and no random access response fed back by the network equipment is received, performing random access according to the four-step random access process.
In a specific embodiment of the present invention, in step 32, when the two-step random access procedure is unsuccessful, performing random access according to the four-step random access procedure, which may further include:
and after the terminal sends the random access request in the two-step random access process, if a random access response fed back by the network equipment is received and the content of the random access response is not matched or matched with the content of the random access request or the random access response is not sent to the terminal, the terminal carries out random access according to the four-step random access process.
Wherein, the random access is performed according to the four-step random access process, which comprises the following steps:
if the first message content in the random access response is the same as the random access response message of the four-step random access process and the second message content is different from the contention resolution message of the four-step random access process, the terminal sends an Msg3 or Radio Resource Control (RRC) establishment request or Radio Resource Control (RRC) connection establishment request or scheduling transmission message in the four-step random access process, and receives the contention resolution message fed back by the network equipment;
and if the content of the first message in the random access response is different from the random access response message of the four-step random access process, the terminal sends a random access request message in the four-step random access process, receives a random access response message fed back by the network equipment, sends a scheduling transmission message to the network equipment, and receives a competition resolving message fed back by the network equipment.
In the above embodiments of the present invention, since TA (Tracking Area) and U L GRANT (uplink GRANT) information are not obtained when MSGA (random access request) is sent through the two-step RACH, the two-step RACH is suitable for a scenario where the terminal is close to the base station;
the base station may therefore configure the terminal with a threshold that may reflect a distance and/or an interference parameter, such as RSSI, RSRP or RSRQ or SINR;
since the amount of data to be transmitted by the MSGA is more than that of the original MSG1, one of the conditions for performing 2-step RACH is that the channel occupancy time of the terminal is longer, and therefore, another threshold configured by the base station to the UE is a threshold of L BT success rate or failure rate or channel occupancy (percentage of measurement samples with RSSI values higher than the threshold value) monitored by the UE;
the terminal judges whether to initiate two-step or four-step RACH according to the condition of the terminal:
the terminal initiates a 2-step RACH according to the indication of the base station, if the base station indicates that the cell supports the 2-step RACH; or comparing the self-measuring result of the UE with the threshold, and judging whether two-step or 4-step random access should be initiated.
In particular, the above thresholds may be used separately or jointly, such that the UE can initiate the RACH in two steps if RSRP is higher than a certain threshold and the occupancy of the channel exceeds a certain threshold.
When the two-step RACH is unsuccessful, the UE reverts to the four-step RACH:
if the terminal exceeds a certain time (Timer specified by base station configuration or protocol) or the MSGA sent by the UE exceeds a certain number of times (Counter specified by base station configuration or protocol), the UE does not receive the feedback of the base station, and then sends a preamble (lead code) according to the 4-step RACH operation;
if the UE receives the feedback information (random access response) from the base station but the content of the received random access response does not match the expected MSG B, e.g. if the UE receives an MSG B that is not intended for itself, the UE understands that MSG3 should be sent next (if the base station feedback content is the same as MSG 2) or MSG1 should be sent next (if the base station feedback content is different from MSG 2). The MSGB of the two-step random access flow is equivalent to MSG2 and MSG 4 in the four-step random access flow;
the above embodiments of the present invention are applicable to a scenario in which a non-connected terminal performs initial random access, and also applicable to a scenario in which a connected terminal performs cell handover, SCell (secondary cell) addition, Beam failure recovery (Beam failure recovery), and reconstruction, and in the above scenario, a base station may instruct a UE through a handover command, an RRC reconfiguration, and other commands: when the contention-based RACH of the above scenario occurs, the UE should initiate either a two-step RACH or a four-step RACH. So that the terminal can initiate a two-step RACH or switch from a two-step RACH to a four-step RACH.
The embodiment of the invention also provides a random access method, which is applied to network equipment and comprises the following steps: step 41, sending the random access conditions of the two-step random access process or the four-step random access process to the terminal; enabling the terminal to carry out two-step random access process according to the random access conditions of the two-step random access process; and performing the four-step random access process according to the random access conditions of the four-step random access process.
Wherein, step 41 may specifically include:
step 411, sending indication information to the terminal, where the indication information is used to indicate the terminal to perform random access according to the two-step random access procedure or the four-step random access procedure; or
Step 412, sending random access configuration information to the terminal, where the random access configuration information includes: and the terminal performs threshold of parameters of the two-step random access process.
Specifically, the indication information or the random access configuration information may be sent to the terminal through a handover command or a radio resource control RRC reconfiguration command.
As shown in fig. 4, an embodiment of the present invention further provides a terminal, including:
a transceiver 41, configured to receive a random access condition of a two-step random access procedure or a four-step random access procedure sent by a network device;
a processor 42, configured to perform random access according to the two-step random access procedure when the random access condition satisfies an access condition of the two-step random access procedure; and when the random access condition meets the access condition of the four-step random access process, performing random access according to the four-step random access process.
Wherein the transceiver is specifically configured to: receiving indication information sent by network equipment, wherein the indication information is used for indicating a terminal to carry out random access according to a two-step random access process or a four-step random access process; or receiving random access configuration information sent by a network device, where the random access configuration information includes: and the terminal performs threshold of parameters of the two-step random access process.
The threshold comprises at least one of the distance between the terminal and the network equipment, reference signal received power RSRP, reference signal received quality RSRQ, signal-to-noise-and-interference ratio SINR, received signal strength indication RSSI, listen-before-send L BT success rate, listen-before-send L BT failure rate and channel occupancy threshold.
It should be noted that the terminal is a network device corresponding to the method shown in fig. 3, and all implementation manners in the method embodiment are applicable to the embodiment of the terminal, and the same technical effect can be achieved.
The terminal may further include: the memory 43, the transceiver 41 and the processor 42, and the transceiver 41 and the memory 43 may be connected through a bus interface, the functions of the transceiver 41 may be implemented by the processor 42, and the functions of the processor 42 may also be implemented by the transceiver 41.
As shown in fig. 5, an embodiment of the present invention further provides a network device, including:
a transceiver 51 for transmitting a random access condition of the two-step random access procedure or the four-step random access procedure to the terminal; enabling the terminal to carry out two-step random access process according to the random access conditions of the two-step random access process; and performing the four-step random access process according to the random access conditions of the four-step random access process.
Wherein the transceiver 51 is specifically configured to: sending indication information to a terminal, wherein the indication information is used for indicating the terminal to carry out random access according to a two-step random access process or a four-step random access process; or sending random access configuration information to the terminal, wherein the random access configuration information comprises: and the terminal performs threshold of parameters of the two-step random access process.
It should be noted that all implementation manners in the method embodiment of the network device side are applicable to the embodiment of the network device, and the same technical effect can be achieved.
The network device may further include: the processor 52, the memory 53, the transceiver 51 and the processor 52, and the transceiver 51 and the memory 53 may be connected through a bus interface, the function of the transceiver 51 may be implemented by the processor 52, and the function of the processor 52 may also be implemented by the transceiver 51.
An embodiment of the present invention further provides a communication device, including: a processor, a memory storing a computer program which, when executed by the processor, performs the method as described above. Specifically, when the communication device is a terminal, the method on the terminal side as shown in fig. 3 is executed, and when the communication device is a network device, the method on the network device side is executed. All embodiments in the above method are equally applicable to the embodiment of the communication device, and the same technical effects can be achieved.
Embodiments of the present invention also provide a computer-readable storage medium including instructions that, when executed on a computer, cause the computer to perform the method as described above.
Those of ordinary skill in the art will appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware or combinations of computer software and electronic hardware. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the implementation. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present invention.
It is clear to those skilled in the art that, for convenience and brevity of description, the specific working processes of the above-described systems, apparatuses and units may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again.
In the embodiments provided in the present invention, it should be understood that the disclosed apparatus and method may be implemented in other ways. For example, the above-described apparatus embodiments are merely illustrative, and for example, the division of the units is only one logical division, and other divisions may be realized in practice, for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form.
The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.
In addition, functional units in the embodiments of the present invention may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit.
The functions, if implemented in the form of software functional units and sold or used as a stand-alone product, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present invention may be embodied in the form of a software product, which is stored in a storage medium and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the method according to the embodiments of the present invention. And the aforementioned storage medium includes: various media capable of storing program codes, such as a U disk, a removable hard disk, a ROM, a RAM, a magnetic disk, or an optical disk.
Furthermore, it is to be noted that in the device and method of the invention, it is obvious that the individual components or steps can be decomposed and/or recombined. These decompositions and/or recombinations are to be regarded as equivalents of the present invention. Also, the steps of performing the series of processes described above may naturally be performed chronologically in the order described, but need not necessarily be performed chronologically, and some steps may be performed in parallel or independently of each other. It will be understood by those skilled in the art that all or any of the steps or elements of the method and apparatus of the present invention may be implemented in any computing device (including processors, storage media, etc.) or network of computing devices, in hardware, firmware, software, or any combination thereof, which can be implemented by those skilled in the art using their basic programming skills after reading the description of the present invention.
Thus, the objects of the invention may also be achieved by running a program or a set of programs on any computing device. The computing device may be a general purpose device as is well known. The object of the invention is thus also achieved solely by providing a program product comprising program code for implementing the method or the apparatus. That is, such a program product also constitutes the present invention, and a storage medium storing such a program product also constitutes the present invention. It is to be understood that the storage medium may be any known storage medium or any storage medium developed in the future. It is further noted that in the apparatus and method of the present invention, it is apparent that each component or step can be decomposed and/or recombined. These decompositions and/or recombinations are to be regarded as equivalents of the present invention. Also, the steps of executing the series of processes described above may naturally be executed chronologically in the order described, but need not necessarily be executed chronologically. Some steps may be performed in parallel or independently of each other.
While the foregoing is directed to the preferred embodiment of the present invention, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention as defined in the appended claims.
Claims (20)
1. A random access method is applied to a terminal, and the method comprises the following steps:
receiving random access conditions of a two-step random access process or a four-step random access process sent by network equipment;
when the random access condition meets the access condition of the two-step random access process, performing random access according to the two-step random access process;
and when the random access condition meets the access condition of the four-step random access process, performing random access according to the four-step random access process.
2. The random access method of claim 1, wherein receiving the random access condition of the two-step random access procedure or the four-step random access procedure sent by the network device comprises:
receiving indication information sent by network equipment, wherein the indication information is used for indicating a terminal to carry out random access according to a two-step random access process or a four-step random access process; or
Receiving random access configuration information sent by a network device, wherein the random access configuration information comprises: and the terminal performs threshold of parameters of the two-step random access process.
3. The random access method of claim 2, wherein the threshold comprises at least one of a distance between the terminal and the network device, a Reference Signal Received Power (RSRP), a Reference Signal Received Quality (RSRQ), a signal-to-noise-and-interference ratio (SINR), a Received Signal Strength Indication (RSSI), a listen before talk L BT success rate, a listen before talk L BT failure rate, and a channel occupancy threshold.
4. The random access method according to claim 2, wherein when the random access condition satisfies an access condition of a two-step random access procedure, performing random access according to the two-step random access procedure includes:
and when the indication information indicates that the terminal accesses according to the two-step random access process, the terminal performs random access according to the two-step random access process.
5. The random access method according to claim 2, wherein when the random access condition satisfies an access condition of a two-step random access procedure, performing random access according to the two-step random access procedure includes:
and when the parameter for random access measured by the terminal meets the threshold of the parameter of the two-step random access process, performing random access according to the two-step random access process.
6. The random access method of claim 2, wherein when the random access condition satisfies an access condition of a four-step random access procedure, performing random access according to the four-step random access procedure comprises:
and when the two-step random access process is unsuccessful, performing random access according to the four-step random access process.
7. The random access method of claim 6, wherein when the two-step random access procedure is unsuccessful, performing random access according to the four-step random access procedure comprises:
when the terminal exceeds a preset time period after the random access request sent in the two-step random access process is carried out, and the random access response fed back by the network equipment is not received, carrying out random access according to the four-step random access process; alternatively, the first and second electrodes may be,
and when the number of times of the random access request message sent in the two-step random access process by the terminal exceeds a preset number of times and no random access response fed back by the network equipment is received, performing random access according to the four-step random access process.
8. The random access method of claim 6, wherein when the two-step random access procedure is unsuccessful, performing random access according to the four-step random access procedure comprises:
and after the terminal sends the random access request in the two-step random access process, if a random access response fed back by the network equipment is received and the content of the random access response is not matched or matched with the content of the random access request or the random access response is not sent to the terminal, the terminal carries out random access according to the four-step random access process.
9. The random access method of claim 8, wherein performing random access according to the four-step random access procedure comprises:
if the content of the first message in the random access response is the same as that of the random access response message of the four-step random access process and the content of the second message is different from that of the contention resolution message of the four-step random access process, the terminal sends an MSG3 or a Radio Resource Control (RRC) establishment request or a Radio Resource Control (RRC) connection establishment request or a scheduling transmission message in the four-step random access process;
and if the content of the first message in the random access response is different from the random access response message of the four-step random access process, the terminal sends a random access request message in the four-step random access process.
10. The random access method according to claim 2, wherein the indication information or the random access configuration information sent by the network device is received through a handover command or a Radio Resource Control (RRC) reconfiguration command.
11. A random access method applied to a network device, the method comprising:
sending the random access conditions of the two-step random access process or the four-step random access process to the terminal; enabling the terminal to carry out two-step random access process according to the random access conditions of the two-step random access process; and performing the four-step random access process according to the random access conditions of the four-step random access process.
12. The random access method of claim 11, wherein sending the random access condition of the two-step random access procedure or the four-step random access procedure to the terminal comprises:
sending indication information to a terminal, wherein the indication information is used for indicating the terminal to carry out random access according to a two-step random access process or a four-step random access process; or
Sending random access configuration information to a terminal, wherein the random access configuration information comprises: and the terminal performs threshold of parameters of the two-step random access process.
13. The random access method according to claim 12, wherein the indication information or the random access configuration information is sent to the terminal by a handover command or a radio resource control, RRC, reconfiguration command.
14. A terminal, comprising:
the transceiver is used for receiving the random access conditions of the two-step random access process or the four-step random access process sent by the network equipment;
a processor, configured to perform random access according to the two-step random access procedure when the random access condition satisfies an access condition of the two-step random access procedure; and when the random access condition meets the access condition of the four-step random access process, performing random access according to the four-step random access process.
15. The terminal according to claim 14, wherein the transceiver is specifically configured to: receiving indication information sent by network equipment, wherein the indication information is used for indicating a terminal to carry out random access according to a two-step random access process or a four-step random access process; or receiving random access configuration information sent by a network device, where the random access configuration information includes: and the terminal performs threshold of parameters of the two-step random access process.
16. The terminal of claim 15, wherein the threshold comprises at least one of a distance between the terminal and the network device, a Reference Signal Received Power (RSRP), a Reference Signal Received Quality (RSRQ), a signal-to-noise-and-interference ratio (SINR), a Received Signal Strength Indication (RSSI), a listen before talk (L) BT success rate, a listen before talk (L) BT failure rate, and an occupancy threshold.
17. A network device, comprising:
a transceiver for transmitting a random access condition of the two-step random access procedure or the four-step random access procedure to the terminal; enabling the terminal to carry out two-step random access process according to the random access conditions of the two-step random access process; and performing the four-step random access process according to the random access conditions of the four-step random access process.
18. The network device of claim 17, wherein the transceiver is specifically configured to: sending indication information to a terminal, wherein the indication information is used for indicating the terminal to carry out random access according to a two-step random access process or a four-step random access process; or sending random access configuration information to the terminal, wherein the random access configuration information comprises: and the terminal performs threshold of parameters of the two-step random access process.
19. A communication device, comprising: a processor, a memory storing a computer program which, when executed by the processor, performs the method of any of claims 1 to 10 or the method of any of claims 11 to 13.
20. A computer-readable storage medium comprising instructions that, when executed on a computer, cause the computer to perform the method of any of claims 1 to 10 or the method of any of claims 11 to 13.
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| CN201910000965.3A CN111405675B (en) | 2019-01-02 | 2019-01-02 | Random access method, terminal and network equipment |
| PCT/CN2020/070090 WO2020140936A1 (en) | 2019-01-02 | 2020-01-02 | Random access method, terminal, and network device |
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| CN111405675B (en) | 2022-06-03 |
| WO2020140936A1 (en) | 2020-07-09 |
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