CN111757535A

CN111757535A - Random access method, indication method, network device and terminal

Info

Publication number: CN111757535A
Application number: CN201910249230.4A
Authority: CN
Inventors: 倪吉庆; 周伟; 黄学艳; 童辉
Original assignee: China Mobile Communications Group Co Ltd; China Mobile Communications Ltd Research Institute
Current assignee: China Mobile Communications Group Co Ltd; China Mobile Communications Ltd Research Institute
Priority date: 2019-03-29
Filing date: 2019-03-29
Publication date: 2020-10-09
Also published as: WO2020200117A1

Abstract

The invention provides a random access method, an indication method, network equipment and a terminal, wherein the random access method comprises the following steps: executing detection operation, and detecting the random access pilot frequency and the uplink shared channel; and sending a random access response message, wherein the content of the random access response message is related to the detection result of the detection operation. The network equipment can determine the content of the random access response message according to the detection result of the random access pilot frequency and the uplink shared channel so as to inform the terminal of the corresponding behavior flow and effectively reduce the random access time delay.

Description

Random access method, indication method, network device and terminal

Technical Field

The present invention relates to the field of communications technologies, and in particular, to a random access method, an indication method, a network device, and a terminal.

Background

In the current NR 15 standard, a procedure for a terminal to initiate a Contention-based random access (CBRA) is roughly as follows:

a terminal sends an uplink signal containing a Preamble sequence (namely, Preamble) on a resource of a Physical Random Access Channel (PRACH), which is called MSG 1; a terminal receives a Random Access Response (RAR) sent by a base station side, and the RAR is called MSG 2; the terminal sends uplink data on the uplink time-frequency resource indicated by the RAR, and the uplink data is called MSG 3; the terminal receives downlink data sent by the base station side, wherein the downlink data contains information related to contention resolution and is called MSG 4. The above procedure is called a 4-step Random Access Channel (RACH) procedure.

In order to reduce the random access delay, the NR R16 standard discusses introducing a 2-step RACH procedure, where the 2-step RACH concentrates MSG 1 and MSG 3 in the original 4-step RACH into one-step transmission, which is called MSG a; MSG2 and MSG 4 are concentrated on one step transmission, called MSG B.

2-step RACH transmission, the terminal sends MSG a, there are several cases:

case 1: both Preamble and Physical Uplink Shared Channel (PUSCH for short) are transmitted unsuccessfully;

case 2: both Preamble and PUSCH are transmitted successfully;

case 3: preamble transmission is successful, and PUSCH transmission is unsuccessful;

when Preamble transmission is successful and PUSCH transmission is unsuccessful, the base station does not send MSG B to the terminal, and under the condition, the terminal can reinitiate the random access flow, so that the random access time delay is increased.

Disclosure of Invention

Embodiments of the present invention provide a random access method, an indication method, a network device, and a terminal, so as to solve the problem in the prior art that when Preamble transmission is successful and PUSCH transmission is unsuccessful, the terminal re-initiates a random access procedure to a base station, thereby increasing random access delay.

In order to solve the technical problem, the invention is realized as follows:

in a first aspect, an embodiment of the present invention provides a random access method, where the random access method is used for a network device, and the random access method includes:

executing detection operation, and detecting the random access pilot frequency and the uplink shared channel;

and sending a random access response message, wherein the content of the random access response message is related to the detection result of the detection operation.

In a second aspect, an embodiment of the present invention provides a random access method, for a terminal, including:

sending a message, wherein the message comprises a random access pilot frequency and uplink data;

detecting a random access response message;

and under the condition that the random access response message is detected, determining the user behavior according to the content of the random access response message.

In a third aspect, an embodiment of the present invention provides an indication method, used in a network device, where the indication method includes:

the type of the random access response message is indicated explicitly or implicitly.

In a fourth aspect, an embodiment of the present invention provides an indication method, where the indication method is used for a terminal, and the indication method includes:

determining a type of a random access response message, wherein the type of the random access response message is indicated by the network equipment in an explicit mode or an implicit mode.

In a fifth aspect, an embodiment of the present invention provides a random access method, where the random access method is used for a terminal, and includes:

sending a message, the message comprising: randomly accessing pilot frequency and uplink data; the uplink data is transmitted at a PUSCH potential transmission opportunity;

the terminal detects the random access response message in a time window, and the starting position of the time window is as follows: a first symbol of a target control resource set;

the target control resource set is a first control resource set which can be monitored after a potential PUSCH transmission opportunity; x symbols are arranged between the first symbol of the target control resource set and the last symbol of the PUSCH occasion, and X is a positive integer.

In a sixth aspect, an embodiment of the present invention provides a network device, including a processor and a transceiver,

the processor is used for executing detection operation and detecting the random access pilot frequency and the uplink shared channel;

the transceiver is configured to send a random access response message, where a content of the random access response message is related to a detection result of the detection operation.

In a seventh aspect, an embodiment of the present invention provides a terminal, including a processor and a transceiver;

the transceiver is used for sending a message, and the message comprises a random access pilot frequency and uplink data;

the processor is configured to detect a random access response message; and under the condition that the random access response message is detected, determining the user behavior according to the content of the random access response message.

In an eighth aspect, an embodiment of the present invention provides a network device, where the network device includes:

and the indicating module is used for indicating the type of the random access response message in an explicit mode or an implicit mode.

In a ninth aspect, an embodiment of the present invention provides a terminal, where the terminal includes:

a determining module, configured to determine a type of a random access response message, where the type of the random access response message is indicated by a network device in an explicit manner or an implicit manner.

In a tenth aspect, an embodiment of the present invention provides a terminal, where the terminal processor and the transceiver:

the transceiver is configured to transmit a message, the message comprising: randomly accessing pilot frequency and uplink data; the uplink data is transmitted at a PUSCH potential transmission opportunity;

the processor is used for the terminal to detect the random access response message in a time window, and the starting position of the time window is as follows: a first symbol of a target control resource set;

In an eleventh aspect, an embodiment of the present invention provides a network device, which includes a processor, a memory, and a computer program stored in the memory and executable on the processor, and when executed by the processor, the computer program implements the steps in the random access method according to the first aspect.

In a twelfth aspect, an embodiment of the present invention provides a terminal, which includes a processor, a memory, and a computer program stored on the memory and executable on the processor, and when the computer program is executed by the processor, the steps in the random access method according to the second aspect are implemented.

In a thirteenth aspect, an embodiment of the present invention provides a network device, including a processor, a memory, and a computer program stored on the memory and executable on the processor, where the computer program, when executed by the processor, implements the steps in the indication method according to the third aspect.

In a fourteenth aspect, an embodiment of the present invention provides a terminal, which is characterized by comprising a processor, a memory, and a computer program stored on the memory and being executable on the processor, and when the computer program is executed by the processor, the steps in the indication method according to the fourth aspect are implemented.

In a fifteenth aspect, an embodiment of the present invention provides a computer-readable storage medium, on which a computer program is stored, where the computer program, when executed by a processor, implements the steps in the random access method according to the first aspect.

In a sixteenth aspect, the present invention provides a computer-readable storage medium, on which a computer program is stored, where the computer program, when executed by a processor, implements the steps in the random access method according to the second aspect.

In a seventeenth aspect, the present invention provides a computer-readable storage medium, on which a computer program is stored, where the computer program, when executed by a processor, implements the steps in the indication method according to the first aspect.

In an eighteenth aspect, the present invention provides a computer-readable storage medium, on which a computer program is stored, and the computer program, when executed by a processor, implements the steps in the indication method according to the second aspect.

In the embodiment of the invention, detection operation is executed, and the random access pilot frequency and the uplink shared channel are detected; and sending a random access response message, wherein the content of the random access response message is related to the detection result of the detection operation. The network equipment can determine the content of the random access response message according to the detection result of the random access pilot frequency and the uplink shared channel so as to inform the terminal of the corresponding behavior flow and effectively reduce the random access time delay.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the description of the embodiments of the present invention will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without inventive exercise.

Fig. 1 is a flowchart of a random access method according to an embodiment of the present invention;

fig. 2a and 2b are schematic diagrams of a MAC payload and a MAC subheader, respectively;

fig. 3 is a flowchart of another random access method provided by an embodiment of the present invention;

FIG. 4 is a flow chart of an indication method provided by an embodiment of the invention;

FIG. 5 is a flow chart of another indication method provided by the embodiments of the present invention;

fig. 6 is a flowchart of another random access method provided in an embodiment of the present invention;

fig. 7 is a diagram of a network device structure according to an embodiment of the present invention;

fig. 8 is a diagram of another network device architecture provided by an embodiment of the present invention;

fig. 9 is a diagram of a terminal structure according to an embodiment of the present invention;

fig. 10 is a diagram of another terminal structure according to an embodiment of the present invention;

fig. 11 is a diagram illustrating a structure of another network device according to an embodiment of the present invention;

fig. 12 is a diagram of another terminal structure according to an embodiment of the present invention.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1, fig. 1 is a flowchart of a random access method provided in an embodiment of the present invention, and is applied to a network device, as shown in fig. 1, the method includes the following steps:

step 101, performing a detection operation to detect a random access pilot and an uplink shared channel.

The random access pilot may be understood as a Preamble sequence (i.e., Preamble). The network equipment detects the random access pilot frequency and the uplink shared channel, and the detection result comprises: the random access pilot frequency and the uplink shared channel are not detected; detecting a random access pilot frequency and an uplink shared channel at the same time; the random access pilot is detected but no uplink shared information is detected.

The network device detects the uplink shared channel, which may be understood as detecting uplink data transmitted on the uplink shared channel, where the uplink data is sent by the terminal.

In the present invention, a network device may be understood as a base station, and a terminal may be understood as a User Equipment (UE).

Step 102, sending a random access response message, wherein the content of the random access response message is related to the detection result of the detection operation.

And the network equipment sends a random access response message to the terminal according to the detection result. The detection results are different, and the contents of the random access response messages are different. Therefore, the corresponding behavior flow can be informed to the terminal, so that the terminal can execute the corresponding user behavior according to different random access response messages sent by the network equipment, and the random access time delay of the terminal can be reduced.

As mentioned earlier, when the terminal transmits MSG a, the following situations are included:

both Preamble and Physical Uplink Shared Channel (PUSCH for short) are transmitted unsuccessfully;

both Preamble and PUSCH are transmitted successfully;

preamble transmission is successful, and PUSCH transmission is unsuccessful;

for the 4-step access flow, when the terminal sends MSG 1, a condition that Preamble transmission is successful or unsuccessful may also occur, so in the specific embodiment of the present invention, the detection result of the network device performing the detection operation correspondingly includes the following various conditions:

detecting a random access pilot frequency and an uplink shared channel;

detecting only the random access pilot without detecting the uplink shared channel;

no random access pilot and no uplink shared channel are detected.

In the embodiment of the present invention, the network device may execute different random access response message sending processes according to the detection result, wherein in one specific manner, according to the detection result, the random access response message sending is determined as follows:

under the condition that the detection result is that the random access pilot frequency and the uplink shared channel are detected, the MSG B in the 2-step random access process is sent;

or

When the detection result is that only the random access pilot frequency is detected and the uplink shared channel is not detected, the MSG2 in the 4-step random access flow is sent;

or

And not sending a random access response message under the condition that the detection result is that the random access pilot frequency and the uplink shared channel are not detected.

Specifically, the network device considers that the terminal adopts the MSG a in the 2-step random access procedure for random access under the condition that the detection result is that the random access pilot frequency and the uplink shared channel are detected, and correspondingly, the network device sends the MSG B in the 2-step random access procedure to the terminal.

And when the detection result is that only the random access pilot frequency is detected and the uplink shared channel is not detected, the network equipment considers that the terminal adopts the MSG 1 in the 4-step random access flow to carry out random access, and correspondingly, the network equipment sends the MSG2 in the 4-step random access flow to the terminal.

And when the network device detects only the random access pilot frequency and does not detect the uplink shared channel as a result of the detection, it may be that the terminal only sends the random access pilot frequency (the random access pilot frequency is MSG 1 in the random access flow) according to the 4-step random access flow, and at this time, the network device sends MSG2 in the 4-step random access flow to the terminal according to the 4-step random access flow. There is also a possibility that the terminal sends an MSG B (the MSG B includes a random access pilot and an uplink shared channel) according to the 2-step random access procedure, but the transmission of the uplink shared channel is unsuccessful, which causes the network device to detect only the random access pilot, at this time, the network device sends the MSG2 in the 4-step random access procedure to the terminal according to the 4-step random access procedure, which can inform the terminal to perform the next processing according to the 4-step random access procedure, and avoid the terminal from initiating the random access procedure again under the condition that the terminal does not receive the random access response message, so as to effectively reduce the random access delay.

The 2-step random access flow is returned to the 4-step random access flow, and for a terminal adopting the 2-step random access flow, even if the network device does not successfully demodulate the PUSCH, the random access response message can still be sent to the terminal, so that the terminal continues to perform access processing according to the 4-step random access flow.

And the network equipment does not send a random access response message under the condition that the detection result is that the random access pilot frequency and the uplink shared channel are not detected. At this time, the terminal does not receive the random access response message, and can initiate the random access procedure again.

For example, 3 UEs perform 2-step random access procedure: the UE1 sends MSG a1 (i.e., Preamble1 and PUSCH1) to the base station; the UE2 sends MSG a2 (i.e. Preamble2 and PUSCH2) to the base station, the UE3 sends MSG A3 (i.e. Preamble3 and PUSCH3) to the base station; the preambles sent by the 3 UEs to the base station are all different. And 3 UEs all simultaneously support a 4-step random access flow and a 2-step random access flow.

The base station performs Preamble detection and corresponding PUSCH detection on a random access Occasion (RACH occupancy, abbreviated as RO). For UE1, the base station does not detect Preamble1 and PUSCH 1; for UE2, the base station detects Preamble2 and PUSCH2 simultaneously; for UE3, the base station detects Preamble3 but not PUSCH 3;

according to the method of the embodiment of the present invention, the base station may not send data (i.e., not send a random access response message) to the UE 1; the base station will send MSG B to UE2 (for 2-step random access procedure); the base station may send MSG2 (for a 4-step random access procedure) to the UE 3. Thus, even if the UE3 sends Preamble3 and PUSCH3 to the base station, the base station detects Preamble3, but does not detect PUSCH3, the base station can send MSG 1 to the UE3 according to the 4-step random access procedure (i.e., the 2-step random access procedure is backed to the 4-step random access procedure), notify the terminal of the corresponding behavior procedure, avoid the UE3 from initiating the random access procedure again, and can effectively reduce the random access delay.

Further, before performing the detection operation and detecting the random access pilot and the uplink shared channel in step 101, the method further includes:

allocating the same random access pilot frequency set to the first type terminal and the second type terminal;

the first type of terminal is a terminal supporting a 4-step random access process;

and the second type of terminal is a terminal supporting a 2-step random access process.

In the specific embodiment of the present invention, it may be implemented that different terminals share the random access pilot, that is, the random access pilot set includes one or more random access pilots, and the random access pilots adopted by the first type of terminal and the second type of terminal belong to the same random access pilot set. The time frequency resource sent by each random access pilot frequency in the random access pilot frequency set can be shared.

In this embodiment, the first type of terminal is a terminal supporting a 4-step random access procedure; the second type of terminal is a terminal supporting a 2-step random access procedure. That is, the network device may support both the 4-step random access procedure and the 2-step random access procedure.

The first type terminal sends Preamble1 to the network device, and the second type terminal sends MSGA to the network device (MSG A includes Preamble2 and PUSCH). After detecting Preamble1, the network device sends MSG2 in the 4-step random access flow to the first type of terminal, and after detecting MSG A, the network device sends MSG B in the 2-step random access flow to the second type of terminal to inform the terminal of the corresponding behavior flow.

For example: the system simultaneously configures a 2-step RACH user (in the invention, the user can be understood as a terminal) and a 4-step RACH user, wherein time-frequency resources sent by a Preamble in the 2-step RACH and the 4-step RACH can be shared;

rel-15 UEs employ 4-RACH, and new function UEs can choose to perform 4-step RACH or 2-step RACH according to configuration.

3 UEs perform RACH procedures. Specifically, the UE1 performs 4-step RACH, transmits Preamble1, the UE2 performs two-step RACH, simultaneously transmits Preamble2 and PUSCH2, the UE3 performs 2-step RACH, and simultaneously transmits Preamble3 and PUSCH 3; the preambles sent by the 3 users are all different.

And the base station performs Preamble detection and corresponding PUSCH detection. For UE1, the base station detects Preamble 1; for UE2, the base station detects Preamble2 and PUSCH2 simultaneously; for UE3, the base station detects Preamble3 but not PUSCH 3.

For the UE1, the base station sends corresponding MSG2 according to the flow of 4-step RACH; for the UE2, the base station sends a corresponding MSG B according to the flow of 2-step RACH; for UE3, the base station transmits the corresponding MSG2 following the procedure of 4-step RACH.

Further, after the step 101 of performing a detection operation to detect the random access pilot and the uplink shared channel, the method further includes:

The type of the random access response message may be understood as whether the response of the network device is MSG2 for a 4-step random access procedure or MSG B for a 2-step random access procedure.

The type of the random access response message indicated by the explicit method is specifically as follows:

carrying indication information through DCI, wherein the indication information is used for indicating the type of the random access response message, and the DCI is used for scheduling the random access response message;

or

And carrying indication information through the MAC CE, wherein the indication information is used for indicating the type of the random access response message, and the MAC CE belongs to the MAC PDU for bearing the random access response message.

Specifically, DCI is Downlink Control Information (DCI), MAC is a Media Access Control Address (MAC), CE is a Control Element (CE), and PDU is a Protocol Data Unit (PDU).

The specific step of carrying the indication information through the DCI is as follows: and carrying the indication information through a response message type indication domain set in the DCI.

The existing DCI format for indicating MSG 2(RAR) is shown in table 1:

TABLE 1

As can be seen from table 1, a DCI currently used for indicating MSG 2(RAR) transmission has 16 reserved bits, and a message sent by a Physical Downlink Shared Channel (PDSCH) for indicating scheduling using one or more bits of the reserved bits is MSG B or MSG 2. A specific design example of a DCI format is shown in table 2:

TABLE 2

The embodiment of the present invention further provides a manner for carrying the indication information by the MAC CE, which specifically includes: and carrying the indication information through the foremost 1 bit of the MAC load part of the MACCE.

In the MAC CE in the existing MSG2, as shown in fig. 2a, the first bit of the MAC payload (i.e., MAC payload) in the MAC CE in MSG2 is a reserved bit R. The existing reserved bits can thus be used to indicate whether the response of the network device is MSG2 for 4-stepRACH (i.e. 4-step random access procedure) or MSG B for 2-step RACH (i.e. 2-step random access procedure).

For example, when R ═ 0, RAR (MSG 2) indicating that the transmitted message is 4-step RACH; when R is 1, it indicates that the transmitted message is MSG B of 2-step RACH. Specifically, the MAC subheader (i.e., MAC subheader, as shown in fig. 2B) of the MAC CE in MSG B is the same as the MAC subheader of the 4-step RAR, and the specific MAC payload is different.

The process of the 2-step RACH is returned to the process of the 4-step RACH, and the design of the MAC CE has additional functions, so that the Preamble resource sharing of the 2-step RACH and the 4-step RACH can be ensured.

The DCI or the MAC CE indicates whether the sent message is MSG 2(RAR) of 4-step RACH or MSG B of 2-step RACH, so that the terminal only needs to decode based on one Radio Network Temporary Identity (RNTI) when detecting the downlink control channel, the design complexity is low, and the implementation is easy.

The embodiment of the present invention further provides a manner, which indicates the type of the random access response message in an implicit manner, and specifically includes:

implicitly indicating a random access response message type by a scrambling sequence of DCI used to schedule the random access response message.

Specifically, a corresponding relationship exists between a scrambling sequence of DCI for scheduling the random access response message and a type of the random access response message, where the scrambling sequence of DCI is different and the type of the random access response message is different. The random access response message type may be determined according to the scrambling sequence of the DCI. For example, when the scrambling sequence of the DCI is the first sequence, the corresponding random access response message type is MSG2 of the 4-step random access procedure; when the scrambling sequence of the DCI is a second sequence, the corresponding type of the random access response message is MSG B of the 2-step random access process, so that when the network equipment adopts the first sequence in the scrambling sequence of the DCI, the type of the random access response message is indicated to be MSG2 of the 4-step random access process; and when the network equipment adopts the second sequence in the scrambling sequence of the DCI, indicating that the type of the random access response message is MSGB of the 2-step random access flow.

Referring to fig. 3, fig. 3 is another flowchart of a random access method provided in an embodiment of the present invention, and is applied to a terminal, as shown in fig. 3, the method includes the following steps:

step 301, sending a message, where the message includes a random access pilot and uplink data.

The random access pilot may be understood as a Preamble sequence (i.e., Preamble). And the terminal sends the random access pilot frequency and the uplink data to the network equipment. The uplink data is transmitted through an uplink shared channel.

In the present invention, a network device may be understood as a base station and a terminal may be understood as a UE.

Step 302, detecting a random access response message.

The random access response message is sent by the network device. The network equipment detects the random access pilot frequency and the uplink data sent by the terminal, and determines whether to send a random access response message to the terminal or determines the content of the random access response message sent to the terminal.

Step 303, determining the user behavior according to the content of the random access response message under the condition that the random access response message is detected.

The terminal determines the behavior of the terminal (i.e., the user) according to the content of the random access response message. The contents of the random access response message are different, and the behavior of the terminal is different.

In the embodiment of the invention, a message is sent, wherein the message comprises a random access pilot frequency and uplink data; detecting a random access response message; and under the condition that the random access response message is detected, determining the user behavior according to the content of the random access response message. The terminal determines the behavior flow corresponding to the terminal according to the content of the received random access response message, so that the terminal can be prevented from repeatedly initiating the random access flow, and the random access time delay of the terminal is effectively reduced.

Further, the content of the random access response message is related to the detection result; and the detection result is obtained by detecting the random access pilot frequency and the uplink shared channel by the network equipment.

The network equipment detects the random access pilot frequency and the uplink data sent by the terminal, and then determines a random access response message according to the detection result. The content of the random access response message is related to the detection result of the network device. And the network equipment sends a random access response message to the terminal according to the detection result. The detection results are different, and the contents of the random access response messages are different. Therefore, the corresponding behavior flow of the terminal can be informed, the terminal is prevented from repeatedly initiating the random access flow to the network equipment, and the random access time delay of the terminal can be reduced.

According to the detection result, the step of determining to send the random access response message is specifically as follows:

under the condition that the detection result is that the random access pilot frequency and the uplink shared channel are detected, the random access response message is MSG B in a 2-step random access flow;

or

And if the detection result is that only the random access pilot frequency is detected, the random access response message is MSG2 in the 4-step random access flow.

The specific record of the network device determining the random access response message according to the detection result may refer to the related description of the network device part in the embodiment shown in fig. 1, which is not described herein again.

The specific determination of the type of the random access response message in an explicit manner is as follows:

determining the type of a random access response message through indication information carried by DCI, wherein the DCI is used for scheduling the random access response message;

or

And determining the type of the random access response message through the indication information carried by the MAC CE, wherein the MAC CE belongs to the MAC PDU carrying the random access response message.

The determining, by the indication information carried by the DCI, the type of the random access response message specifically includes: and determining the type of the random access response message through a response message type indication field in the DCI.

Determining the type of the random access response message through the indication information carried by the MAC CE specifically comprises the following steps: and determining the type of the random access response message through the indication information carried by the first 1 bit of the MAC load part of the MACCE.

The implicit method for determining the type of the random access response message specifically includes:

implicitly determining a random access response message type by a scrambling sequence of DCI used to schedule the random access response message.

The network device determines the type of the random access response message in a display manner and an implicit manner, which may specifically refer to the related description of the network device in the embodiment shown in fig. 1, and is not described herein again.

The terminal sends Preamble and PUSCH to the network equipment, when the network equipment only detects the Preamble, the network equipment sends MSG2 in the 4-step random access flow to the terminal, and the terminal carries out the next processing according to the MSG 2. In the above process, the terminal initiates a random access flow to the network device according to the MSG a in the 2-step random access flow, and when the network device detects only the Preamble, the network device responds according to the 4-step random access flow, that is, sends MSG2 in the 4-step random access flow to the terminal, so that the terminal backs from the 2-step random access flow to the 4-step random access flow.

In the embodiment of the present invention, the UE can perform corresponding processing according to different random access response messages sent by the network device, and the UE can identify the type of the random access response message and needs to indicate according to the display or the implicit indication of the network device.

Referring to fig. 4, fig. 4 is a flowchart of an indication method provided by an embodiment of the present invention, which is applied to a network device, and as shown in fig. 4, the method includes the following steps:

step 401, the type of the random access response message is indicated explicitly or implicitly.

The terminal initiates a random access procedure to the network device, for example, the random access procedure may be MSG 1 in a 4-step random access procedure or MSG a in a 2-step random access procedure. And the network equipment sends the type of the random access response message to the terminal. The type of the random access response message is used to indicate whether the random access response message is MSG2 in a 4-step random access procedure or MSG B in a 2-step random access procedure.

In this way, for a network device that can support both the 4-step random access procedure and the 2-step random access procedure, the type of the random access response message can be indicated in an explicit manner or an implicit manner, so as to inform the terminal of the corresponding behavior procedure.

Specifically, under the condition that the type of the random access response message is indicated by the network device in an explicit manner, the DCI for scheduling the random access response message carries indication information, where the indication information is used to indicate the type of the random access response message;

or

Under the condition that the type of the random access response message is indicated by network equipment in an explicit mode, an MAC CE in an MAC PDU carrying the random access response message carries indication information, and the indication information is used for indicating the type of the random access response message;

or

And implicitly indicating the type of the random access response message by a scrambling sequence of DCI (Downlink control information) used for scheduling the random access response message under the condition that the type of the random access response message is implicitly indicated by network equipment.

Further, under the condition that the DCI carries the indication information, carrying the indication information through a response message type indication domain set in the DCI;

or

And under the condition that the MAC CE carries the indication information, carrying the indication information through the foremost 1 bit of the MAC load part of the MAC CE.

Further, the random access response message is MSG B in the 2-step random access procedure; or, the random access response message is MSG2 in a 4-step random access procedure.

Specifically, when detecting the random access pilot frequency and the uplink shared channel, the network device considers that the terminal performs random access by using the MSG a in the 2-step random access procedure, and correspondingly, the network device sends the MSG B in the 2-step random access procedure to the terminal.

When the network device detects only the random access pilot frequency but not the uplink shared channel, the network device considers that the terminal adopts the MSG 1 in the 4-step random access flow to perform random access, and correspondingly, the network device sends the MSG2 in the 4-step random access flow to the terminal.

When the network device detects only the random access pilot frequency and does not detect the uplink shared channel as a result of the detection, it may be that the terminal sends only the random access pilot frequency (the random access pilot frequency is MSG 1 in the random access flow) according to the 4-step random access flow, and at this time, the network device sends MSG2 in the 4-step random access flow to the terminal according to the 4-step random access flow. There is also a possibility that the terminal sends MSG B (MSG B includes a random access pilot and an uplink shared channel) according to the 2-step random access procedure, but the network device only detects the random access pilot, at this time, the network device sends MSG2 in the 4-step random access procedure to the terminal according to the 4-step random access procedure, and can inform the terminal to perform the next processing according to the 4-step random access procedure, so as to avoid that the terminal initiates the random access procedure again under the condition that the terminal does not receive the random access response message, so as to effectively reduce the random access delay.

The 2-step random access flow is returned to the 4-step random access flow, and for a terminal adopting the 2-step random access flow, even if the network device does not successfully demodulate the PUSCH, the terminal can still send a random access response message to the terminal, so that the terminal can perform the next processing according to the 4-step random access flow.

Referring to fig. 5, fig. 5 is a flowchart of an indication method provided by an embodiment of the present invention, which is applied to a terminal, and as shown in fig. 5, the method includes the following steps:

step 501, determining a type of a random access response message, where the type of the random access response message is indicated by a network device in an explicit manner or an implicit manner.

In this way, for a terminal that can support both the 4-step random access procedure and the 2-step random access procedure, the network device may indicate the type of the random access response message in an explicit manner or an implicit manner, so as to inform the terminal of the corresponding behavior procedure.

or

Referring to fig. 6, fig. 6 is a flowchart of a random access method provided in an embodiment of the present invention, which is applied to a terminal, and the method includes:

step 601, sending a message, wherein the message comprises: randomly accessing pilot frequency and uplink data; the uplink data is transmitted at a PUSCH potential transmission opportunity.

The random access pilot may be understood as a Preamble sequence (i.e., Preamble). And the terminal sends the random access pilot frequency and the uplink data to the network equipment. And transmitting the uplink data through the uplink shared channel and sending the uplink data at the potential PUSCH sending opportunity.

Step 602, the terminal detects a random access response message in a time window, where the starting position of the time window is: a first symbol of a target control resource set;

For example, the system information broadcasts transmission parameters of a 2-step random access procedure, and 3 UEs perform the 2-step random access procedure: the UE1 sends MSG a1 (i.e., Preamble1 and PUSCH1) to the base station; the UE2 sends MSG a2 (i.e. Preamble2 and PUSCH2) to the base station, the UE3 sends MSG A3 (i.e. Preamble3 and PUSCH3) to the base station; the preambles sent by the 3 UEs to the base station are all different. The 3 UEs all support 4-step random access flows and 2-step random access flows at the same time;

the base station sends no data (i.e., no random access response message) to the UE 1; the base station sends MSG B (for 2-step random access procedure) to UE 2; the base station sends MSG2 to UE3 (for a 4-step random access procedure);

three UEs monitor a Physical Downlink Control Channel (PDCCH for short) within a time window (RAR monitoring window) of a corresponding random access response message. The starting positions of the time windows of the three UEs are the first symbol of the first control resource set after the PUSCH transmission is completed, or the first symbol of the first control resource set after X symbols (i.e., symbols) after the PUSCH transmission is completed, where X is a positive integer.

That is, the starting position of the time window is: a first symbol of a target control resource set; the target control resource set is a first control resource set which can be monitored after a potential PUSCH transmission opportunity; x symbols are arranged between the first symbol of the target control resource set and the last symbol of the PUSCH occasion, and X is a positive integer.

The UE1 does not detect the PDCCH, and after adjusting the corresponding transmission parameters, retransmits the MSG a on the subsequent RACH occase; the UE2 detects the PDCCH, the response indication information in the DCI indicates that the scheduled message is MSG B (i.e. the random access response message adopts a 2-step random access procedure), the UE2 detects MSG B, and the 2-step random access procedure is ended; the UE3 detects the PDCCH, the corresponding indication information in the DCI indicates that the scheduled message is MSG2 (i.e., the random access response message adopts a 4-step random access procedure), and the UE3 performs a subsequent 4-step random access procedure.

For another example, the system simultaneously configures a 2-step RACH user and a 4-step RACH user, wherein time-frequency resources sent by a Preamble in the 2-step RACH and the 4-step RACH can be shared;

rel-15UE adopts 4-RACH, and new function UE can select 4-step RACH or 2-step RACH according to configuration;

3 UEs perform RACH procedures. Specifically, the UE1 performs 4-step RACH, transmits Preamble1, the UE2 performs two-step RACH, simultaneously transmits Preamble2 and PUSCH2, the UE3 performs 2-step RACH, and simultaneously transmits Preamble3 and PUSCH 3; the preambles sent by the 3 users are all different;

and the base station performs Preamble detection and corresponding PUSCH detection. For UE1, the base station detects Preamble 1; for UE2, the base station detects Preamble2 and PUSCH2 simultaneously; for UE3, the base station detects Preamble3 but not PUSCH 3;

for the UE1, the base station sends corresponding MSG2 according to the flow of 4-step RACH; for the UE2, the base station sends a corresponding MSG B according to the flow of 2-step RACH; for the UE3, the base station sends corresponding MSG2 according to the flow of 4-step RACH;

and the three UEs monitor the downlink control channel in the time window of the corresponding random access response message. The starting position of a time window of a user (UE1) of the 4-step RACH flow is a first symbol of a first control resource set after Preamble transmission is completed; the starting position of a time window of 2-step RACH users (UE2 and UE3) is the first symbol of the first control resource set after the completion of PUSCH transmission, or the first symbol of the first control resource set after X symbols (i.e. symbol) after the completion of PUSCH transmission, wherein X is a positive integer;

the UE1 detects the PDCCH and the msg2 and carries out the subsequent 4-step RACH flow; the UE2 detects the PDCCH, the MAC-CE in the demodulated response message indicates that the response is msgB, and the 2-step RACH flow is ended; the UE3 detects the PDCCH, the MAC-CE in the demodulated response message indicates that the response is msg2 (4-step RACH), and the user performs the subsequent 4-step RACH flow.

In this embodiment, a message is sent, where the message includes: randomly accessing pilot frequency and uplink data; the uplink data is transmitted at a PUSCH potential transmission opportunity; the terminal detects the random access response message in a time window, and the starting position of the time window is as follows: a first symbol of a target control resource set; the target control resource set is a first control resource set which can be monitored after a potential PUSCH transmission opportunity; x symbols are arranged between the first symbol of the target control resource set and the last symbol of the PUSCHOccasion, and X is a positive integer. In this way, the terminal can detect the random access response message in the time window, so as to perform the next processing according to the detected random access response message.

Further, in step 602, after the terminal detects the random access response message in the time window, the random access method further includes:

The content in this step is the same as that in step 303, and reference may be specifically made to the content in step 303, which is not described herein again.

Further, the content of the random access response message is related to the detection result;

and the detection result is obtained by detecting the random access pilot frequency and the uplink shared channel by the network equipment.

Further, when the detection result is that the random access pilot frequency and the uplink shared channel are detected, the random access response message is MSG B in the 2-step random access procedure;

or

Further, the random access response method further includes:

the type of the random access response message is determined explicitly or implicitly.

or

In addition, the type of the random access response message determined by the indication information carried by the DCI is specifically: and determining the type of the random access response message through a response message type indication field in the DCI.

Determining the type of the random access response message through the indication information carried by the MAC CE specifically comprises the following steps: and determining the type of the random access response message through the indication information carried by the first 1 bit of the MAC load part of the MAC-CE.

Further, the determining the type of the random access response message in an implicit manner specifically includes:

Referring to fig. 7, fig. 7 is a schematic structural diagram of a network device according to an embodiment of the present invention, and as shown in fig. 7, a network device 700 includes:

a detection module 701, configured to perform a detection operation, and detect a random access pilot and an uplink shared channel;

a sending module 702, configured to send a random access response message, where content of the random access response message is related to a detection result of the detection operation.

Further, the sending the random access response message specifically includes:

or

Further, the network module further includes:

the allocation module is used for allocating the same random access pilot frequency set to the first type terminal and the second type terminal;

Further, the network module further includes:

Further, the type of the random access response message indicated by the explicit method is specifically:

or

Further, the DCI carrying the indication information specifically includes: and carrying the indication information through a response message type indication domain set in the DCI.

Further, the specific indication information carried by the MAC CE is: the indication information is carried by the first 1 bit of the MAC payload part of the MAC CE.

Further, the type of the random access response message is indicated in an implicit manner specifically as follows:

The network device 700 can implement each process implemented by the network device in the method embodiment shown in fig. 1, and is not described here again to avoid repetition.

The network device 700 of the embodiment of the present invention performs a detection operation to detect a random access pilot and an uplink shared channel; and sending a random access response message, wherein the content of the random access response message is related to the detection result of the detection operation. The network equipment can determine the content of the random access response message according to the detection result of the random access pilot frequency and the uplink shared channel so as to inform the terminal of the corresponding behavior flow and effectively reduce the random access time delay.

Referring to fig. 8, an embodiment of the present invention further provides a network device, which includes a bus 1001, a transceiver 1002, an antenna 1003, a bus interface 1004, a processor 1005, and a memory 1006.

The processor 1005 is configured to perform a detection operation to detect a random access pilot and an uplink shared channel;

the transceiver 1002 is configured to send a random access response message, where the content of the random access response message is related to the detection result of the detection operation.

Further, the transceiver is specifically configured to:

or

Further, the processor is further configured to:

or

Further, the processor is further configured to: and carrying the indication information through a response message type indication domain set in the DCI.

Further, the processor is further configured to: the indication information is carried by the first 1 bit of the MAC payload part of the MAC CE.

Further, the processor is further configured to:

In this embodiment, the network device further includes: a computer program stored on the memory 1006 and executable on the processor 1005. Wherein the computer program when executed by the processor 1005 may perform the steps of:

Further, the computer program, when being executed by the processor 1005, is further configured to send MSG B in the 2-step random access procedure when the detection result is that the random access pilot and the uplink shared channel are detected;

or

Further, the computer program, when executed by the processor 1005, is further configured to:

or

Further, the computer program, when executed by the processor 1005, is further configured to: and carrying the indication information through a response message type indication domain set in the DCI.

Further, the computer program, when executed by the processor 1005, is further configured to: the indication information is carried by the first 1 bit of the MAC payload part of the MAC CE.

The network device can implement each process implemented by the network device in the method embodiment shown in fig. 1, and is not described here again to avoid repetition.

The network equipment of the embodiment of the invention executes detection operation and detects the random access pilot frequency and the uplink shared channel; and sending a random access response message, wherein the content of the random access response message is related to the detection result of the detection operation. The network equipment can determine the content of the random access response message according to the detection result of the random access pilot frequency and the uplink shared channel so as to inform the terminal of the corresponding behavior flow and effectively reduce the random access time delay.

In fig. 8, a bus architecture (represented by bus 1001), bus 1001 may include any number of interconnected buses and bridges, and bus 1001 links together various circuits including one or more processors, represented by processor 1005, and memory, represented by memory 1006. The bus 1001 may also link together various other circuits such as peripherals, voltage regulators, power management circuits, and the like, which are well known in the art, and therefore, will not be described any further herein. A bus interface 1004 provides an interface between the bus 1001 and the transceiver 1002. The transceiver 1002 may be one element or may be multiple elements, such as multiple receivers and transmitters, providing a means for communicating with various other apparatus over a transmission medium. Data processed by the processor 1005 is transmitted over a wireless medium via the antenna 1003, and further, the antenna 1003 receives the data and transmits the data to the processor 1005.

Processor 1005 is responsible for managing bus 1001 and general processing, and may also provide various functions including timing, peripheral interfaces, voltage regulation, power management, and other control functions. And memory 1006 may be used for storing data used by processor 1005 in performing operations.

Alternatively, the processor 1005 may be a CPU, ASIC, FPGA or CPLD.

Preferably, an embodiment of the present invention further provides a network device, including a processor 1005, a memory 1006, and a computer program stored in the memory 1006 and capable of running on the processor 1005, where the computer program, when executed by the processor 1005, implements the processes in the random access method embodiment shown in fig. 1, and can achieve the same technical effects, and in order to avoid repetition, details are not described here again.

Preferably, an embodiment of the present invention further provides a network device, including a processor 1005, a memory 1006, and a computer program stored in the memory 1006 and capable of running on the processor 1005, where the computer program, when executed by the processor 1005, implements the processes in the above-mentioned indication method embodiment shown in fig. 4, and can achieve the same technical effects, and in order to avoid repetition, details are not described here again.

Referring to fig. 9, fig. 9 is a schematic structural diagram of a terminal according to an embodiment of the present invention, and as shown in fig. 9, the terminal 900 includes:

a sending module 901, configured to send a message, where the message includes a random access pilot and uplink data;

a detecting module 902, configured to detect a random access response message;

a determining module 903, configured to determine, when the random access response message is detected, a user behavior according to the content of the random access response message.

or

Further, the type of the random access response message is determined explicitly or implicitly.

Further, the specific determination of the type of the random access response message in an explicit manner is:

or

Further, the determining the type of the random access response message through the indication information carried by the DCI specifically includes: and determining the type of the random access response message through a response message type indication field in the DCI.

Further, determining the type of the random access response message through the indication information carried by the MAC CE specifically includes: and determining the type of the random access response message through the indication information carried by the first 1 bit of the MAC load part of the MAC-CE.

The terminal 900 can implement each process implemented by the terminal in the method embodiment shown in fig. 3, and is not described herein again to avoid repetition.

The terminal 900 of the embodiment of the present invention sends a message, where the message includes a random access pilot and uplink data; detecting a random access response message; and under the condition that the random access response message is detected, determining the user behavior according to the content of the random access response message. The terminal determines the behavior flow corresponding to the terminal according to the content of the received random access response message, so that the terminal can be prevented from repeatedly initiating the random access flow, and the random access time delay of the terminal is effectively reduced.

Fig. 10 is a schematic structural diagram of another terminal for implementing various embodiments of the present invention, where the terminal 1100 includes, but is not limited to: a transceiver unit 1101, a network module 1102, an audio output unit 1103, an input unit 1104, a sensor 1105, a display unit 1106, a user input unit 1107, an interface unit 1108, a memory 1109, a processor 1110, a power supply 1111, and the like. Those skilled in the art will appreciate that the terminal configuration shown in fig. 10 is not intended to be limiting, and that the terminal may include more or fewer components than shown, or some components may be combined, or a different arrangement of components. In the embodiment of the present invention, the terminal includes, but is not limited to, a mobile phone, a tablet computer, a notebook computer, a palm computer, a vehicle-mounted terminal, a wearable device, a pedometer, and the like.

The transceiver 1101 sends a message, where the message includes a random access pilot and uplink data;

the processor 1110 is configured to detect a random access response message; and under the condition that the random access response message is detected, determining the user behavior according to the content of the random access response message.

or

Further, the method also comprises the following steps:

or

The terminal 1100 is capable of implementing each process implemented by the terminal in the method embodiment shown in fig. 3, and is not described here again to avoid repetition.

The terminal 1100 of the embodiment of the present invention sends a message, where the message includes a random access pilot and uplink data; detecting a random access response message; and under the condition that the random access response message is detected, determining the user behavior according to the content of the random access response message. The terminal determines the behavior flow corresponding to the terminal according to the content of the received random access response message, so that the terminal can be prevented from repeatedly initiating the random access flow, and the random access time delay of the terminal is effectively reduced.

It should be understood that, in the embodiment of the present invention, the transceiver unit 1101 may be configured to receive and transmit signals during a message transmission or call process, and specifically, receive downlink data from a base station and then process the received downlink data to the processor 1110; in addition, the uplink data is transmitted to the base station. Generally, the transceiver unit 1101 includes, but is not limited to, an antenna, at least one amplifier, a transceiver, a coupler, a low noise amplifier, a duplexer, and the like. Furthermore, the transceiving unit 1101 may also communicate with a network and other devices through a wireless communication system.

The terminal provides the user with wireless broadband internet access via the network module 1102, such as helping the user send and receive e-mails, browse web pages, and access streaming media.

The audio output unit 1103 may convert audio data received by the transceiving unit 1101 or the network module 1102 or stored in the memory 1109 into an audio signal and output as sound. Also, the audio output unit 1103 may also provide audio output related to a specific function performed by the terminal 1100 (e.g., a call signal reception sound, a message reception sound, etc.). The audio output unit 1103 includes a speaker, a buzzer, a receiver, and the like.

The input unit 1104 is used to receive audio or video signals. The input Unit 1104 may include a Graphics Processing Unit (GPU) 11041 and a microphone 11042, and the Graphics processor 11041 processes image data of still pictures or video obtained by an image capturing apparatus (such as a camera) in a video capturing mode or an image capturing mode. The processed image frames may be displayed on the display unit 1106. The image frames processed by the graphic processor 11041 may be stored in the memory 1109 (or other storage medium) or transmitted via the transceiving unit 1101 or the network module 1102. The microphone 11042 may receive sound and can process such sound into audio data. The processed audio data may be converted into a format output transmittable to a mobile communication base station via the transceiving unit 1101 in case of the phone call mode.

Terminal 1100 can also include at least one sensor 1105, such as a light sensor, motion sensor, and other sensors. Specifically, the light sensor includes an ambient light sensor that adjusts the brightness of the display panel 11061 according to the brightness of ambient light, and a proximity sensor that turns off the display panel 11061 and/or a backlight when the terminal 1100 moves to the ear. As one of the motion sensors, the accelerometer sensor can detect the magnitude of acceleration in each direction (generally three axes), detect the magnitude and direction of gravity when stationary, and can be used to identify the terminal posture (such as horizontal and vertical screen switching, related games, magnetometer posture calibration), vibration identification related functions (such as pedometer, tapping), and the like; the sensors 1105 may also include fingerprint sensors, pressure sensors, iris sensors, molecular sensors, gyroscopes, barometers, hygrometers, thermometers, infrared sensors, etc., and will not be described in detail herein.

The display unit 1106 is used to display information input by a user or information provided to the user. The Display unit 1106 may include a Display panel 11061, and the Display panel 11061 may be configured in the form of a Liquid Crystal Display (LCD), an Organic Light-Emitting Diode (OLED), or the like.

The user input unit 1107 may be used to receive input numeric or character information and generate key signal inputs related to user settings and function control of the terminal. Specifically, the user input unit 1107 includes a touch panel 11071 and other input devices 11072. The touch panel 11071, also referred to as a touch screen, may collect touch operations by a user on or near the touch panel 11071 (e.g., operations by a user on or near the touch panel 11071 using a finger, a stylus, or any other suitable object or attachment). The touch panel 11071 may include two portions of a touch detection device and a touch controller. The touch detection device detects the touch direction of a user, detects a signal brought by touch operation and transmits the signal to the touch controller; the touch controller receives touch information from the touch sensing device, converts the touch information into touch point coordinates, and sends the touch point coordinates to the processor 1110, and receives and executes commands sent from the processor 1110. In addition, the touch panel 11071 may be implemented by various types, such as a resistive type, a capacitive type, an infrared ray, and a surface acoustic wave. The user input unit 1107 may include other input devices 11072 in addition to the touch panel 11071. In particular, the other input devices 11072 may include, but are not limited to, a physical keyboard, function keys (e.g., volume control keys, switch keys, etc.), a trackball, a mouse, and a joystick, which are not described in detail herein.

Further, the touch panel 11071 can be overlaid on the display panel 11061, and when the touch panel 11071 detects a touch operation thereon or nearby, the touch operation is transmitted to the processor 1110 to determine the type of the touch event, and then the processor 1110 provides a corresponding visual output on the display panel 11061 according to the type of the touch event. Although the touch panel 11071 and the display panel 11061 are shown in fig. 6 as two separate components to implement the input and output functions of the terminal, in some embodiments, the touch panel 11071 and the display panel 11061 may be integrated to implement the input and output functions of the terminal, and is not limited herein.

The interface unit 1108 is an interface for connecting an external device to the terminal 1100. For example, the external device may include a wired or wireless headset port, an external power supply (or battery charger) port, a wired or wireless data port, a memory card port, a port for connecting a device having an identification module, an audio input/output (I/O) port, a video I/O port, an earphone port, and the like. Interface unit 1108 may be used to receive input (e.g., data information, power, etc.) from external devices and transmit the received input to one or more elements within terminal 1100 or may be used to transmit data between terminal 1100 and external devices.

The memory 1109 may be used to store software programs as well as various data. The memory 1109 may mainly include a storage program area and a storage data area, where the storage program area may store an operating system, an application program (such as a sound playing function, an image playing function, etc.) required by at least one function, and the like; the storage data area may store data (such as audio data, a phonebook, etc.) created according to the use of the cellular phone, and the like. In addition, the memory 1109 may include high speed random access memory and may also include non-volatile memory, such as at least one magnetic disk storage device, flash memory device, or other volatile solid state storage device.

The processor 1110 is a control center of the terminal, connects various parts of the entire terminal using various interfaces and lines, and performs various functions of the terminal and processes data by operating or executing software programs and/or modules stored in the memory 1109 and calling data stored in the memory 1109, thereby integrally monitoring the terminal. Processor 1110 may include one or more processing units; preferably, the processor 1110 may integrate an application processor, which mainly handles operating systems, user interfaces, application programs, etc., and a modem processor, which mainly handles wireless communications. It will be appreciated that the modem processor described above may not be integrated into processor 1110.

The terminal 1100 can also include a power supply 1111 (e.g., a battery) for providing power to various components, and preferably, the power supply 1111 can be logically connected to the processor 1110 via a power management system, so as to manage charging, discharging, and power consumption management functions via the power management system.

In addition, the terminal 1100 includes some functional modules that are not shown, and thus, are not described in detail herein.

Preferably, an embodiment of the present invention further provides a terminal, including a processor 1110, a memory 1109, and a computer program stored in the memory 1109 and capable of running on the processor 1110, where the computer program, when executed by the processor 1110, implements each process of the random access method embodiment shown in fig. 3, and can achieve the same technical effect, and is not described herein again to avoid repetition.

Preferably, an embodiment of the present invention further provides a terminal, including a processor 1110, a memory 1109, and a computer program stored in the memory 1109 and capable of running on the processor 1110, where the computer program, when executed by the processor 1110, implements each process of the above-mentioned indication method embodiment shown in fig. 5, and can achieve the same technical effect, and in order to avoid repetition, details are not described here again.

Fig. 11 is a schematic structural diagram of a network device according to an embodiment of the present invention, and as shown in fig. 11, a network device 1200 includes:

an indicating module 1201, configured to indicate the type of the random access response message explicitly or implicitly.

Further, under the condition that the type of the random access response message is indicated by the network device in an explicit manner, the DCI for scheduling the random access response message carries indication information, where the indication information is used to indicate the type of the random access response message;

or

In this embodiment, the type of the random access response message is indicated in an explicit manner or an implicit manner, and for a network device that can support both the 4-step random access procedure and the 2-step random access procedure, the type of the random access response message may be indicated in an explicit manner or an implicit manner, so as to inform a terminal of a corresponding behavior procedure.

Fig. 12 is a schematic structural diagram of a network device according to an embodiment of the present invention, and as shown in fig. 11, a terminal 1300 includes:

a determining module 1301, configured to determine a type of a random access response message, where the type of the random access response message is indicated by a network device in an explicit manner or an implicit manner.

or

In this embodiment, the terminal 1300 determines the type of the random access response message, where the type of the random access response message is indicated by the network device in an explicit manner or an implicit manner. In this way, for a terminal that can support both the 4-step random access procedure and the 2-step random access procedure, the network device may indicate the type of the random access response message in an explicit manner or an implicit manner, so as to inform the terminal of the corresponding behavior procedure.

An embodiment of the present invention further provides a computer-readable storage medium, where a computer program is stored on the computer-readable storage medium, and when the computer program is executed by a processor, the computer program implements each process of the random access method embodiment shown in fig. 1, and can achieve the same technical effect, and in order to avoid repetition, details are not repeated here.

An embodiment of the present invention further provides a computer-readable storage medium, where a computer program is stored on the computer-readable storage medium, and when the computer program is executed by a processor, the computer program implements each process of the random access method embodiment shown in fig. 3, and can achieve the same technical effect, and in order to avoid repetition, details are not repeated here.

An embodiment of the present invention further provides a computer-readable storage medium, where a computer program is stored on the computer-readable storage medium, and when the computer program is executed by a processor, the computer program implements each process of the indicating method embodiment shown in fig. 4, and can achieve the same technical effect, and in order to avoid repetition, details are not repeated here.

An embodiment of the present invention further provides a computer-readable storage medium, where a computer program is stored on the computer-readable storage medium, and when the computer program is executed by a processor, the computer program implements each process of the indicating method embodiment shown in fig. 5, and can achieve the same technical effect, and in order to avoid repetition, details are not repeated here.

The computer readable storage medium is, for example, ROM, RAM, magnetic disk or optical disk.

It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.

Through the above description of the embodiments, those skilled in the art will clearly understand that the method of the above embodiments can be implemented by software plus a necessary general hardware platform, and certainly can also be implemented by hardware, but in many cases, the former is a better implementation manner. Based on such understanding, the technical solutions of the present invention may be embodied in the form of a software product, which is stored in a storage medium (such as ROM/RAM, magnetic disk, optical disk) and includes instructions for enabling a terminal (such as a mobile phone, a computer, a server, an air conditioner, or a network device) to execute the method according to the embodiments of the present invention.

While the present invention has been described with reference to the embodiments shown in the drawings, the present invention is not limited to the embodiments, which are illustrative and not restrictive, and it will be apparent to those skilled in the art that various changes and modifications can be made therein without departing from the spirit and scope of the invention as defined in the appended claims.

Claims

1. A random access method for a network device, the random access method comprising:

2. The random access method according to claim 1, wherein the sending the random access response message specifically is:

or

3. The random access method according to claim 1, wherein before performing the detection operation to detect the random access pilot and the uplink shared channel, the method further comprises:

4. The random access method of claim 1, wherein after the performing the detecting operation, detecting the random access pilot and the uplink shared channel, further comprises:

5. The random access method according to claim 4, wherein the explicit indication of the type of the random access response message is specifically:

or

6. The random access method according to claim 5, wherein the DCI carrying the indication information specifically includes: and carrying the indication information through a response message type indication domain set in the DCI.

7. The random access method according to claim 5, wherein the carrying of the indication information by the MAC CE specifically includes: the indication information is carried by the first 1 bit of the MAC payload part of the MAC CE.

8. The random access method according to claim 4, wherein the type of the random access response message is implicitly indicated as:

9. A random access method for a terminal, the random access method comprising:

detecting a random access response message;

10. The random access method of claim 9, wherein:

the content of the random access response message is related to the detection result;

11. The random access method of claim 10, wherein:

or

12. The random access method of claim 9, further comprising:

13. The random access method according to claim 12, wherein the explicitly determining the type of the random access response message specifically comprises:

or

14. The random access method according to claim 13, wherein the determining the type of the random access response message through the indication information carried in the DCI specifically includes: and determining the type of the random access response message through a response message type indication field in the DCI.

15. The random access method according to claim 13, wherein the determining the type of the random access response message through the indication information carried by the MAC CE specifically includes: and determining the type of the random access response message through the indication information carried by the first 1 bit of the MAC load part of the MAC-CE.

16. The random access method according to claim 12, wherein the implicitly determining the type of the random access response message specifically includes:

17. An indication method for a network device, the indication method comprising:

18. An indication method used for a terminal, the indication method comprising:

19. The indication method according to claim 17 or 18, characterized in that:

under the condition that the type of the random access response message is indicated by network equipment in an explicit mode, DCI used for scheduling the random access response message carries indication information, wherein the indication information is used for indicating the type of the random access response message;

or

20. The indication method of claim 19, wherein:

under the condition that the DCI carries the indication information, carrying the indication information through a response message type indication domain set in the DCI;

or

21. The indication method according to claim 17 or 18, wherein the random access response message is MSG B in a 2-step random access procedure; or, the random access response message is MSG2 in a 4-step random access procedure.

22. A random access method for a terminal, comprising:

23. A network device comprising a processor and a transceiver,

24. The network device of claim 23, wherein the transceiver is specifically configured to:

or

25. The network device of claim 23, wherein the processor is further configured to:

26. The network device of claim 23, wherein the processor is further configured to:

27. The network device of claim 26, wherein the processor is further configured to:

or

28. The network device of claim 27, wherein the processor is further configured to: and carrying the indication information through a response message type indication domain set in the DCI.

29. The network device of claim 27, wherein the processor is further configured to: and carrying the indication information through the foremost 1 bit of the MAC load part of the MACCE.

30. The network device of claim 26, wherein the processor is further configured to:

31. A terminal, characterized in that the terminal comprises a processor and a transceiver:

32. The terminal of claim 31, wherein:

33. The terminal of claim 32, wherein:

or

34. The terminal of claim 31, further comprising:

35. The terminal of claim 34, wherein the explicit determination of the type of the random access response message is specifically:

or

36. The terminal according to claim 35, wherein the determining the type of the random access response message through the indication information carried in the DCI specifically includes: and determining the type of the random access response message through a response message type indication field in the DCI.

37. The terminal according to claim 35, wherein the determining the type of the random access response message through the indication information carried by the MAC CE specifically includes: and determining the type of the random access response message through the indication information carried by the first 1 bit of the MAC load part of the MAC-CE.

38. The terminal of claim 34, wherein the implicitly determining the type of the random access response message specifically comprises:

39. A network device, characterized in that the network device comprises:

40. A terminal, characterized in that the terminal comprises:

41. A terminal, characterized in that the terminal comprises a processor and a transceiver:

42. A network device comprising a processor, a memory and a computer program stored on the memory and executable on the processor, the computer program, when executed by the processor, implementing the steps in the random access method according to any one of claims 1 to 8.

43. A terminal comprising a processor, a memory and a computer program stored on the memory and executable on the processor, the computer program, when executed by the processor, implementing the steps in the random access method according to any one of claims 9 to 16.

44. A network device comprising a processor, a memory and a computer program stored on the memory and executable on the processor, the computer program, when executed by the processor, implementing the steps in the indication method according to any one of claims 17, 19-21.

45. A terminal, characterized in that it comprises a processor, a memory and a computer program stored on the memory and executable on the processor, which computer program, when executed by the processor, carries out the steps in the indication method according to any one of claims 18, 19-21.

46. A computer-readable storage medium, having stored thereon a computer program which, when being executed by a processor, carries out the steps of the random access method according to any one of claims 1 to 8.

47. A computer-readable storage medium, having stored thereon a computer program which, when being executed by a processor, carries out the steps of the random access method according to any one of claims 9 to 16.

48. A computer-readable storage medium, having stored thereon a computer program which, when being executed by a processor, carries out the steps of the indication method according to any one of claims 17, 19-21.

49. A computer-readable storage medium, characterized in that a computer program is stored on the computer-readable storage medium, which computer program, when being executed by a processor, carries out the steps in the indication method according to any one of claims 18, 19-21.