CN113678562B

CN113678562B - Communication method, terminal device and network device

Info

Publication number: CN113678562B
Application number: CN201980091411.7A
Authority: CN
Inventors: 石聪
Original assignee: Beijing Opper Communication Co ltd
Current assignee: Beijing Opper Communication Co ltd
Priority date: 2019-03-25
Filing date: 2019-03-25
Publication date: 2023-12-05
Anticipated expiration: 2039-03-25
Also published as: WO2020191599A1; CN113678562A

Abstract

The embodiment of the application provides a communication method, terminal equipment and network equipment, which can reduce the communication time delay in the random access process and improve the success rate of random access in the random access process. The method comprises the following steps: the terminal equipment performs 2 steps of random access processes and 4 steps of random access processes in parallel; in case of successful access through one of the 2-step random access procedure and the 4-step random access procedure, the terminal device stops the other random access procedure in progress.

Description

Communication method, terminal device and network device

Technical Field

The embodiment of the application relates to the technical field of communication, in particular to a communication method, terminal equipment and network equipment.

Background

In a communication system, a terminal device may access a network through a random access procedure.

With the development of communication systems, lower and lower communication delay is desired, so how to reduce the communication delay in the random access process is a problem to be solved.

Disclosure of Invention

The embodiment of the application provides a communication method, terminal equipment and network equipment, which can reduce the communication time delay in the random access process and improve the success rate of random access in the random access process.

In a first aspect, a communication method is provided, including: the terminal equipment performs 2 steps of random access processes and 4 steps of random access processes in parallel; in case of successful access through one of the 2-step random access procedure and the 4-step random access procedure, the terminal device stops the other random access procedure in progress.

In a second aspect, a communication method is provided, including: in case that the terminal device performs one random access procedure of the 2-step random access procedure and the 4-step random access procedure in parallel to achieve successful access, the network device performs at least one of the following operations: stopping another random access procedure in progress and/or transmitting first indication information in one random access procedure for realizing successful access, wherein the first indication information is used for indicating the terminal equipment to stop another random access procedure.

In a third aspect, a terminal device is provided for performing the method in the first aspect.

Specifically, the terminal device comprises functional modules for performing the method in the first aspect described above.

In a fourth aspect, a network device is provided for performing the method in the second aspect.

In particular, the network device comprises functional modules for performing the method in the second aspect described above.

In a fifth aspect, a communication device is provided that includes a processor, a memory, and a transceiver. The memory is for storing a computer program and the processor is for calling and running the computer program stored in the memory for controlling the transceiver to perform the method of the first or second aspect described above.

In a sixth aspect, a chip is provided for implementing the method in the first or second aspect.

Specifically, the chip includes: a processor for calling and running a computer program from a memory, so that a device on which the chip is mounted performs the method as in the first or second aspect described above via a transceiver.

In a seventh aspect, a computer-readable storage medium is provided for storing a computer program that causes a computer to perform the method of the first or second aspect described above through a transceiver.

In an eighth aspect, there is provided a computer program product comprising computer program instructions for causing a computer to perform the method of the first or second aspect described above via a transceiver.

In a ninth aspect, there is provided a computer program which, when run on a computer, causes the computer to perform the method of the first or second aspect described above through a transceiver.

According to the technical scheme, the terminal equipment performs the 2-step random access process and the 4-step random access process in parallel, and under the condition that one random access process realizes successful access, the other random access process in progress is stopped, so that the success rate of access can be increased, and the time delay of successful access can be reduced.

Drawings

Fig. 1 is a schematic diagram of a communication system architecture according to an embodiment of the present application.

Fig. 2 is a schematic diagram of a 4-step random access procedure.

Fig. 3 is a schematic diagram of a 2-step random access procedure.

Fig. 4 is a schematic diagram of a random access response (Random Access Response, RAR) structure.

Fig. 5 is a schematic diagram of the RAR structure.

Fig. 6 is a schematic diagram of the RAR structure.

Fig. 7 is a schematic diagram of the RAR structure.

Fig. 8 is a schematic flow chart diagram of a communication method according to an embodiment of the present application.

Fig. 9 is a schematic flow chart diagram of another communication method according to an embodiment of the present application.

Fig. 10 is a schematic block diagram of a terminal device according to an embodiment of the present application.

Fig. 11 is a schematic block diagram of a network device according to an embodiment of the present application.

Fig. 12 is a schematic block diagram of a communication device provided according to an embodiment of the present application.

Fig. 13 is a schematic block diagram of a communication apparatus provided according to an embodiment of the present application.

Detailed Description

The following description of the technical solutions according to the embodiments of the present application will be given with reference to the accompanying drawings in the embodiments of the present application, and it is apparent that the described embodiments are some embodiments of the present application, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.

The technical scheme of the embodiment of the application can be applied to various communication systems, such as: global system for mobile communications (Global System of Mobile communication, GSM), code division multiple access (Code Division Multiple Access, CDMA), wideband code division multiple access (Wideband Code Division Multiple Access, WCDMA) systems, general packet radio service (General Packet Radio Service, GPRS), long term evolution (Long Term Evolution, LTE) systems, LTE frequency division duplex (Frequency Division Duplex, FDD) systems, LTE time division duplex (Time Division Duplex, TDD), universal mobile telecommunications system (Universal Mobile Telecommunication System, UMTS), worldwide interoperability for microwave access (Worldwide Interoperability for Microwave Access, wiMAX) communication systems, or 5G systems, and the like.

An exemplary communication system 100 to which embodiments of the present application may be applied is shown in fig. 1. The communication system 100 may include a network device 110, and the network device 110 may be a device that communicates with a terminal device 120 (or referred to as a communication terminal, terminal). Network device 110 may provide communication coverage for a particular geographic area and may communicate with terminal devices located within the coverage area. Alternatively, the network device 110 may be a base station (Base Transceiver Station, BTS) in a GSM system or a CDMA system, a base station (NodeB, NB) in a WCDMA system, an evolved base station (Evolutional Node B, eNB or eNodeB) in an LTE system, or a radio controller in a cloud radio access network (Cloud Radio Access Network, CRAN), or the network device may be a mobile switching center, a relay station, an access point, a vehicle device, a wearable device, a hub, a switch, a bridge, a router, a network-side device in a 5G network, or a network device in a future evolved public land mobile network (Public Land Mobile Network, PLMN), etc.

The communication system 100 further comprises at least one terminal device 120 located within the coverage area of the network device 110. "terminal device" as used herein includes, but is not limited to, a connection via a wireline, such as via a public-switched telephone network (Public Switched Telephone Networks, PSTN), a digital subscriber line (Digital Subscriber Line, DSL), a digital cable, a direct cable connection; and/or another data connection/network; and/or via a Wireless interface, e.g., for a cellular network, a Wireless Local area network (Wireless Local AreaNetwork, WLAN), a digital television network such as a DVB-H network, a satellite network, an AM-FM broadcast transmitter; and/or means of the other terminal device arranged to receive/transmit communication signals; and/or internet of things (Internet of Things, ioT) devices. Terminal devices arranged to communicate over a wireless interface may be referred to as "wireless communication terminals", "wireless terminals" or "mobile terminals". Examples of mobile terminals include, but are not limited to, satellites or cellular telephones; a personal communications system (Personal Communications System, PCS) terminal that may combine a cellular radiotelephone with data processing, facsimile and data communications capabilities; a PDA that can include a radiotelephone, pager, internet/intranet access, web browser, organizer, calendar, and/or a global positioning system (Global Positioning System, GPS) receiver; and conventional laptop and/or palmtop receivers or other electronic devices that include a radiotelephone transceiver. A terminal device may refer to an access terminal, user Equipment (UE), subscriber unit, subscriber station, mobile station, remote terminal, mobile device, user terminal, wireless communication device, user agent, or User Equipment. An access terminal may be a cellular telephone, a cordless telephone, a session initiation protocol (Session Initiation Protocol, SIP) phone, a wireless local loop (Wireless Local Loop, WLL) station, a personal digital assistant (Personal Digital Assistant, PDA), a handheld device with wireless communication capabilities, a computing device or other processing device connected to a wireless modem, an in-vehicle device, a wearable device, a terminal device in a 5G network or a terminal device in a future evolved PLMN, etc.

Alternatively, direct terminal (D2D) communication may be performed between the terminal devices 120.

Alternatively, the 5G system or 5G network may also be referred to as a New Radio (NR) system or NR network.

Fig. 1 illustrates one network device and two terminal devices by way of example, and the communication system 100 may alternatively include multiple network devices and may include other numbers of terminal devices within the coverage area of each network device, as embodiments of the application are not limited in this regard.

Optionally, the communication system 100 may further include a network controller, a mobility management entity, and other network entities, which are not limited by the embodiment of the present application.

It should be understood that a device having a communication function in a network/system according to an embodiment of the present application may be referred to as a communication device. Taking the communication system 100 shown in fig. 1 as an example, the communication device may include a network device 110 and a terminal device 120 with communication functions, where the network device 110 and the terminal device 120 may be specific devices described above, and are not described herein again; the communication device may also include other devices in the communication system 100, such as a network controller, a mobility management entity, and other network entities, which are not limited in this embodiment of the present application.

It should be understood that the terms "system" and "network" are used interchangeably herein. The term "and/or" is herein merely an association relationship describing an associated object, meaning that there may be three relationships, e.g., a and/or B, may represent: a exists alone, A and B exist together, and B exists alone. In addition, the character "/" herein generally indicates that the front and rear associated objects are an "or" relationship.

In a communication system, a terminal device may access a network through a random access procedure. The general random access procedure can be divided into a 4-step random access procedure and a 2-step random access procedure.

The 4-step random access procedure and the 2-step random access procedure will be described below with reference to fig. 2 and 3, respectively.

Fig. 2 shows a schematic diagram of a 4-step random access procedure.

The terminal device sends a message 1 (MSG 1, which may be referred to as a first step message in a 4-step random access procedure) to the network device 201. Accordingly, the network device may receive the MSG1. The MSG1 may include a random access preamble.

Specifically, the terminal device may select a physical random access channel (Physical Random Access Channel, PRACH) resource (including a time domain resource and a frequency domain resource) and a random access preamble (preamble), and may transmit the selected random access preamble on the selected PRACH resource. Wherein the terminal device may select PRACH resources from a set of PRACH resources and may select a random access preamble from a set of random access preambles.

202, the network device may send message 2 (MSG 2, which may be referred to as a second step message in a 4-step random access procedure) to the terminal device. Accordingly, the terminal device may receive the MSG2. The MSG2 may include a random access response message (Random Access Response, RAR).

Specifically, after receiving the MSG1, the network device may estimate uplink timing based on the random access preamble carried in the MSG1, estimate uplink resources required for the terminal device to perform MSG3 transmission, and send the MSG2 based thereon.

MSG2 may include a physical downlink control channel (Physical Downlink Control Channel, PDCCH) and a physical downlink shared channel (Physical Downlink Shared Channel, PDSCH). The PDCCH may be scrambled by a random access radio network temporary identity (Random Access Radio Network Temporary Identity, RA-RNTI), which may be derived from time-frequency resources selected by the terminal device for transmitting the random access preamble.

The RA-RNTI may be calculated by, but is not limited to, the following equation 1:

RA-rnti=1+s_id+14×t_id+14×80×f_id+14×80×8×ul_carrier_id equation 1

Wherein s_id represents a subframe ID of the selected time-frequency resource, t_id represents a symbol ID of the selected time-frequency resource, f_id represents a frequency domain ID of the selected time-frequency resource, and ul_carrier_id represents an uplink carrier ID of the selected time-frequency resource.

The PDCCH transmitted by the network device may be used to schedule a PDSCH, which may include a RAR. The structure of PAR may be as shown in fig. 4 to 7.

As shown in fig. 4, the medium access control (Media Access Control, MAC) protocol data unit (Protocol Data Unit, PDU) transmitted in the second step message may include a plurality of sub-PDUs (i.e., MAC sub-PDU 1, MAC sub-PDU 2, up to MAC sub-PDUn), each of which may include a sub-header, and may further include a MAC RAR, etc.

As shown in fig. 5, a random access back-off index (BI) may be included in the sub-header of the RAR to indicate a back-off time for retransmitting the first step message.

And as shown in fig. 6, the sub-header of the RAR includes a RAR Identity (RARID) for the index of the random access preamble to which the network device responds.

As shown in fig. 7, a time advance command field (Timing Advance Command) may be included in the load of the RAR for adjusting uplink timing, an uplink Grant (UL Grant) field, a temporary cell radio network temporary identity (Temporary Cell Radio Network Temporary Identity, TC-RNTI), etc.

E in fig. 4-7 is an extension bit indicating whether a MAC sub-PDU including a MAC sub-header is the last MAC sub-PDU. T represents an indication of whether RAPID or backoff (backoff) is included in the MAC subheader. The R bits are reserved bits.

For the terminal device, after MSG1 is transmitted, an RAR listening window may be started, the terminal device may listen to the PDCCH in the window, and the terminal device may descramble the PDCCH using the RA-RNTI. And acquiring the PDSCH scheduled by the PDCCH based on the PDCCH obtained by descrambling.

303, the terminal device sends a message 3 (MSG 3, which may be referred to as a third step message in a 4-step random access procedure) to the network device, and accordingly, the network device may receive the MSG3 sent by the terminal device. The MSG3 may include a radio resource control (Radio Resource Control, RRC) message, among other things.

In particular, the terminal device may grant a message 3 to the network device based on the resources in MSG 2. The message 3 may inform the network device of a trigger event for the terminal device to trigger random access.

Further, the terminal device may also carry identification information in MSG3, such as a cell radio network temporary identity (Cell Radio Network Temporary Identity, C-RNTI), a 5G SAE temporary Mobile identity (5G SAE Temporary Mobile Station Identifier,5G-S-TMSI) or a C-RNTI and Short integrity message authentication code (Short MAC-I (Message Authentication Code Integrity, MAC-I)), etc.

For example, in the initial random access procedure, the identification information may be 5G-S-TMSI, and in the RRC re-establishment triggered random access procedure, the identification information may be C-RNTI and Short MAC-I.

The identification information can be carried in the fourth step message to enable the competition conflict to be resolved, namely the terminal equipment realizes successful access.

In 304, the network device sends a message 4 (MSG 4, which may be referred to as a fourth step message in a 4-step random access procedure) to the terminal device, and accordingly, the terminal device receives the MSG4 sent by the network device.

Specifically, after receiving the MSG3, the network device may send the MSG4 to the terminal device, where the MSG4 may include identification information carried by the terminal device in the MSG3, and an RRC reconfiguration message.

For the terminal device, a timer (e.g., contention resolution timer (Contention resolution timer)) may be started to listen for MSG4 after MSG3 is sent.

MSG4 may be used to enable resolution of contention conflicts, where resolution of contention conflicts may be achieved in the following manner.

In one mode, if the terminal device carries the C-RNTI in the MSG3, the MSG4 uses the PDCCH scrambled by the C-RNTI for scheduling.

In a second mode, if the terminal equipment does not carry C-RNTI in MSG3, for example, the terminal equipment is random access triggered by initial access, the MSG4 uses PDCCH (physical downlink control channel) scrambled by TC-RNTI; the resolution of the collision may be achieved by the terminal device receiving PDSCH in MSG4 by matching common control channel (common control channel, CCCH) service data units (Service Data Unit, SDU) in PDSCH.

Table 1 below shows what each step message needs to carry in a four-step random access procedure in a scenario of multiple event triggered random access.

TABLE 1

While a 4-step random access procedure has been described above, it should be understood that the content carried by each message in the 4-step random access procedure described above is merely one implementation of the present application, and should not be construed as limiting the embodiments of the present application in any way.

Fig. 3 shows a schematic diagram of a 2-step random access procedure.

In 301, the terminal device may send a message a (MSGA) to the network device, which may receive the message a accordingly.

The MSGA may consist of a random access preamble and a payload portion, which may carry information in MSG3 in the 4-step random access procedure described above. For example, RRC signaling when the terminal device is in an idle state, or C-RNTI when the RRC is in a connected state, etc. Wherein the payload part in the MSGA may be carried by a physical uplink shared channel (Physical Uplink Shared Channel, PUSCH).

In 302, the network device may send the MSGB to the terminal device, which may receive the MSGB sent by the network device. The MSGB may include the contents of MSG2 and MSG4 in the 4-step random process described above.

After the network device analyzes the successful MSGA, the network device can send the MSGB to the terminal device, thereby realizing the solution of the competition conflict. The situation where the network device receives the MSGA may be one of the following:

case 1: the network equipment successfully decodes the random access preamble;

case 2: the network equipment successfully decodes the random access preamble and the load part;

case 3: the network device successfully decodes the payload portion but does not decode the random access preamble.

Wherein, for case 2, the network device may send the MSGB to the terminal device.

The terminal device may fall back to the 4-step random access procedure in case the 2-step random access procedure does not achieve a successful access, which will increase the time delay of the successful access.

The embodiment of the application provides the following scheme, and can solve the problem of time delay.

Fig. 8 is a schematic flow chart diagram of a communication method 400 according to an embodiment of the application. The method 400 includes at least some of the following.

In 410, the terminal device performs 2-step random access procedure and 4-step random access procedure in parallel.

In 420, in case of successful access through one of the 2-step random access procedure and the 4-step random access procedure, the terminal device stops another random access procedure in progress.

Specifically, since the terminal device performs the 2-step random access procedure and the 4-step random access procedure in parallel, when one of the random access procedures realizes successful access, the other random access procedure is stopped, so that the success rate of access can be increased and the time delay of successful access can be reduced.

Fig. 9 is a schematic flow chart diagram of a communication method 500 according to an embodiment of the application. The method 500 includes at least some of the following.

In 510, in case that one random access procedure of the 2-step random access procedure and the 4-step random access procedure performed in parallel by the terminal device realizes successful access, the network device performs at least one of the following operations:

stopping another random access procedure in progress;

and sending first indication information in one random access process for realizing successful access, wherein the first indication information is used for indicating the terminal equipment to stop another random access process.

It was mentioned above that in case that one of the 2-step random access procedure and the 4-step random access procedure is successfully accessed, the other random access procedure that is in progress is stopped, and in some cases, there is a possibility that one of the random access procedures fails to be accessed, at this time, the network terminal device and the network device can continue the other random access procedure, whereby the success rate of random access can be increased.

For a clearer understanding of the present application, embodiments of the present application will be described below, and the following description may be applied to the above-described methods 400 and 500.

The parallelism of the 2-step random access procedure and the 4-step random access procedure mentioned in the embodiments of the present application may mean that there is at least partial overlap in time between the two random access procedures. The starting points of the 2-step random access procedure and the 4-step random access procedure may be the same, or may be different, for example, different by a certain time length, etc.

When the terminal equipment performs 2 steps of random access processes and 4 steps of random access processes in parallel, the successful access is possible to be achieved by the 2 steps of random access processes, while the 4 steps of random access processes are still in progress, and when the successful access is achieved, the terminal equipment is possible to be in any one of the following processes for the 4 steps of random access processes:

1) Preparing a first step message

2) Sending a first step message

3) Waiting to monitor for second step messages

4) Detecting a second step message

5) Preparing the third step message

6) Sending a third step message

7) Waiting to monitor for fourth step messages

8) Detecting fourth step messages

The terminal device may be in any one of the above processes, and in case that the terminal device realizes successful access through the 2-step random access process, the terminal device may terminate any one of the above ongoing processes in the 4-step random access process.

Or when the terminal equipment performs 2 steps of random access processes and 4 steps of random access processes in parallel, the successful access is possible to be the 4 steps of random access processes, the 2 steps of random access processes are still in progress, and when the successful access is achieved, the terminal equipment can be in any one of the following processes for the 2 steps of random access processes:

1) Preparing a first step message

2) Sending a first step message

3) Waiting to monitor for second step messages

4) Detecting a second step message

The terminal device may be in any one of the above processes, and in case that the terminal device realizes successful access through the 4-step random access process, the terminal device may terminate any one of the above 2-step random access processes.

When the terminal equipment performs 2 steps of random access processes and 4 steps of random access processes in parallel, the successful access is possible to be achieved by the 2 steps of random access processes, while the 4 steps of random access processes are still in progress, and when the successful access is achieved, the network equipment is possible to be in any one of the following processes for the 4 steps of random access processes:

1) Preparing a second step message

3) Sending a second step message

4) Waiting to detect the third step message

5) Detecting third step messages

6) Preparing the fourth message

7) Sending the fourth step message

The network device may be in any one of the above processes, and the terminal device may terminate any one of the above ongoing processes in the 4-step random access process in case that the access is successful through the 2-step random access process.

Or when the terminal equipment performs 2 steps of random access processes and 4 steps of random access processes in parallel, the successful access is possible to be realized by the 4 steps of random access processes, the 2 steps of random access processes are still in progress, and when the successful access is realized, the network equipment can be in any one of the following processes aiming at the 2 steps of random access processes:

Any one of the following processes:

1) Preparing a second step message

2) Sending a second step message

The network device may be in any one of the above processes, and the terminal device may terminate any one of the above ongoing processes in the 2-step random access process in case that the access is successful through the 4-step random access process.

Optionally, in the embodiment of the present application, after one random access procedure fails, the network device may also actively stop another random access procedure of the terminal device, where the network device may further carry first indication information in a last step message of the random access procedure for implementing the success of the access, and instruct the terminal device to stop another random access procedure, for example, the first indication information may be carried in a second step message in the 2-step random access procedure or carried in a fourth step message in the 4-step random access procedure.

Alternatively, in the embodiment of the present application, the network device may send only the first indication information, without actively stopping the ongoing random access procedure of the terminal device, and the terminal device may implement stopping the ongoing random access procedure.

Alternatively, in the embodiment of the present application, the network device may just actively stop the ongoing random access procedure, and not send the first indication information.

It was mentioned above that in case that one of the 2-step random access procedure and the 4-step random access procedure is successfully accessed, the other random access procedure being performed is stopped, and in some cases, there may be a possibility that one of the random access procedures fails to be accessed, at this time, the terminal device may continue the other random access procedure, whereby the success rate of random access may be increased.

In the embodiment of the application, one random access procedure realizes access failure, while the other random access procedure is in progress, and the terminal equipment can reinitiate the random access procedure with the access failure.

Alternatively, the terminal device may not reinitiate the random access procedure, but wait for the result of the other random access procedure, and if the other random access procedure does not achieve successful access, reinitiate the random access procedure, and reinitiate the random access procedure may be a parallel 2-step random access procedure and a 4-step random access procedure.

For example, the 2-step random access procedure is in progress, after the terminal device has sent message 1 of the 4-step random access procedure, if MSG2 is not detected within the listening window, the 4-step random access procedure may fail this time, and the terminal device may reinitiate the 4-step random access procedure, that is, retransmit message 1.

Of course, the terminal device may also wait for the result of the 2-step random access procedure, and if the 2-step random access procedure does not achieve successful access, may initiate the random access procedure again, and the reinitiated random access procedure may be a parallel 2-step random access procedure and 4-step random access procedure.

The foregoing indicates that the random access procedure may be retransmitted (where retransmitting the random access procedure may refer to repeating the random access procedure), and both the 2-step random access procedure and the 4-step random access procedure according to the embodiment of the present application may be retransmitted.

For example, if the terminal device is triggered to perform the random access procedure, the terminal device may perform the 2-step random access procedure and the 4-step random access procedure in parallel, and if the 4-step random access procedure fails, the 2-step random access procedure may be performed, and if the 2-step random access procedure fails and the 4-step random access procedure is performed after the 4-step random access procedure is re-initiated, the terminal device may re-initiate the 2-step random access procedure, and so on, until the 2-step random access procedure and the 4-step random access procedure reach respective maximum retransmission times, respectively, or until one random access procedure exists in the 2-step random access procedure and the 4-step random access procedure to achieve success of the access.

The above examples refer to that the 2-step random access procedure and the 4-step random access procedure have respective maximum retransmission times, and the respective maximum retransmission times of the 2-step random access procedure and the 4-step random access procedure may be configured by the network device, respectively, or the network device configures a maximum retransmission times as the maximum retransmission times of the 2-step random access procedure and the 4-step random access procedure, respectively.

Alternatively, in the embodiment of the present application, the maximum number of retransmissions may be the sum of the number of retransmissions allowed for the 2-step random access procedure and the 4-step random access procedure.

For example, if the maximum number of retransmissions is 8, the sum of retransmissions of the 2-step random access procedure and the 4-step random access procedure is allowed to be no more than 8, for example, the 4-step random access procedure is retransmitted 5 times, the 2-step random access procedure is retransmitted 3 times, the maximum number of retransmissions is reached, the terminal device is not allowed to perform retransmission of the random access procedure any more, and the random access may be performed after waiting for a period of time, for example.

Optionally, in an embodiment of the present application, the first step message in the 2-step random access procedure includes a first random access preamble and a first payload portion, where the first random access preamble sent in the 2-step random access procedure is multiplexed as the random access preamble in the first step message in the 4-step random access procedure.

Specifically, since the 2-step random access procedure and the 4-step random access procedure both include random access preambles, the random access preamble transmitted once can be used as both the random access preamble of the 2-step random access procedure and the preamble of the 4-step random access procedure. Alternatively, it may be understood that the random access preamble in the 2-step random access procedure and the random access preamble in the 4-step random access procedure may be the same random access preamble transmitted on the same PRACH resource, so that the random access resource may be saved.

In this case, the terminal device further transmits the payload portion in the first step message.

After the first random access preamble is sent, the terminal device may open a first frame listening window for listening to a second step message in the 4-step random access process;

specifically, the terminal device may monitor the RA-RNTI scrambled PDCCH for receiving an RAR within the listening window, and if a subsequent correct RAR is received, transmit Msg3 and initiate contention resolution timer to monitor Msg4.

After the first random access preamble and the first payload portion are sent, the terminal device may open a second frame listening window for listening to a second step message in the 2-step random access procedure.

In particular, the terminal device may use the RA-RNTI scrambled PDCCH (if the C-RNTI is not included in the first step message) or the C-RNTI scrambled PDCCH (if the C-RNTI is included in the second step message) for receiving the second step message within the listening window.

For the network device, after parsing the first random access preamble, a second step message in a 2-step random access procedure may be transmitted for the random access preamble, and after parsing the first payload portion, a second step message in a 4-step random access procedure may be transmitted.

Optionally, in an embodiment of the present application, the first step message in the 2-step random access procedure includes a second random access preamble and a second payload portion, and the first step message in the 4-step random access procedure includes a third random access preamble, and the second random access preamble and the third random access preamble are respectively transmitted.

Specifically, the terminal device may send random access preambles, that is, a second random access preamble and a third random access preamble, respectively, for the 2-step random access procedure and the 4-step random access procedure, where the second random access preamble may be the same as or different from the third random access preamble.

After the second random access preamble and the second load part are sent, the terminal equipment starts a third frame listening window for listening to a second step message in the 2-step random access process.

After the third random access preamble is sent, the terminal equipment starts a fourth frame listening window for listening to a second step message in the 4-step random access process.

For the network device, a second step message in a 2-step random access procedure may be sent after parsing the second random access preamble and the second payload portion, and a second step message in a 4-step random access procedure may be sent after parsing the third random access preamble.

For the case where the above-mentioned 2-step random access procedure and 4-step random access procedure share the random access preamble, which may occur in the first 2-step random access procedure and 4-step random access procedure performed in parallel, if one of the subsequent random access procedures fails, another random access procedure may be performed, at which time the random access preamble may be transmitted for the one random access procedure, for example, the 2-step random access procedure first achieves the access failure, while the 4-step random access procedure is ongoing, the terminal device may transmit the random access preamble and the payload portion, and the network device may transmit only the second step message in the 2-step random access procedure after parsing the random access preamble and the payload portion, and no longer transmit the second step message in the 4-step random access procedure.

In the embodiment of the application, the terminal equipment can perform 2-step random access process and 4-step random access process in parallel when random access is performed under any condition. Or, the 2-step random access process and the 4-step random access process can be performed in parallel under a certain condition.

Specifically, when the state of the terminal device satisfies the specific state and/or the event triggering the random access is the specific event, the terminal device performs the 2-step random access process and the 4-step random access process in parallel.

For example, as long as the state in which the terminal is in is a specific state, the terminal device performs a 2-step random access procedure and a 4-step random access procedure in parallel.

For example, the terminal device may perform a 2-step random access procedure and a 4-step random access procedure in parallel whenever the event triggering random access is a specific event.

For example, the terminal device may perform the 2-step random access event and the 4-step random access event when the state in which the terminal device is located is a specific state and the event triggering the random access is a specific event.

The states of the terminal device mentioned in the embodiment of the present application may be an idle state, a connection state, an inactive state (inactive), etc.

Wherein the particular state may include at least one of: a connected state, an idle state, and an inactive state.

In the embodiment of the present application, the event for triggering random access may be any one of the following:

initial access from RRC idle state (Initial access from RRC IDLE);

RRC connection reestablishment procedure (RRC Connection Re-establishment procedure);

handover (Handover);

when the uplink synchronization state is out of sync, uplink or downlink data arrives during the RRC connected state (DL or UL data arrival during RRC _ CONNECTED when UL synchronisation status is "non-synchronized");

Transition from RRC unconnected state (Transition from RRC INACTIVE);

requests for other system information (Request for Other SI).

In the embodiment of the application, the triggering event can be subdivided.

For example, data arrival during RRC connected state triggers random access, which may also be classified into scheduling request (Scheduling Request, SR) triggered random access of different logical channels.

In the embodiment of the application, when the trigger event is a specific trigger event, the terminal equipment can perform a 2-step random access process and a 4-step random access process in parallel.

Wherein the specific event may be an initial access or a specific logical channel trigger SR.

The specific logical channel in the embodiment of the present application may be a logical channel of a specific service.

The specific service in the embodiment of the present application may be a service with a higher priority, for example, a URLLC service.

Alternatively, in the embodiment of the present application, in some cases, the conditions that need to be met for performing the 2-step random access procedure and the 4-step random access procedure in parallel as mentioned above may be preset on the terminal device, or may be configured by the network device.

In one implementation, the network device may send second indication information to the terminal device, where the terminal device receives the second indication information sent by the network device; wherein the second indication information indicates:

the specific state and/or the specific event; or,

whether the various states of the terminal equipment are states required by the terminal equipment to perform 2-step random access processes and 4-step random access processes in parallel, and/or whether each event triggering random access triggers the terminal equipment to perform 2-step random access processes and 4-step random access processes in parallel.

In particular, the network device may configure the terminal device with the above-mentioned specific states and/or specific events, i.e. the network device may directly inform the terminal device which are the above-mentioned specific states and/or specific events.

Or, the network device may also configure each state and/or whether each event triggering random access may trigger parallel 2-step random access procedure and 4-step random access procedure to the terminal device.

Optionally, in an embodiment of the present application, the second indication information is carried in a system message or in radio resource control RRC dedicated signaling.

For example, the network device may transmit a system message, which may indicate which RRC state of the terminal device may perform 2-step random access procedure and 4-step random access procedure in parallel.

For example, the network device may indicate through RRC dedicated signaling whether the terminal device having the capability of performing 2-step random access procedures and 4-step random access procedures in parallel in the connected state allows the 2-step random access procedures and the 4-step random access procedures to be performed in parallel.

For example, the network device may indicate which logical channels of SRs allow 2-step and 4-step random access procedures to be performed in parallel, e.g., logical channels allowing URLLC traffic may trigger 2-step and 4-step random access procedures to be performed in parallel.

For example, for an inactive state terminal device, the network device indicates, through RRC dedicated signaling (e.g., RRC connection release message) when suspending (suspend) the terminal device, whether the parallel random access capable terminal device is allowed to initiate a parallel 4-step random access procedure and a 2-step random access procedure when next triggering connection recovery.

Alternatively, in the embodiment of the present application, a specific state and a specific trigger event may not exist, but the terminal device may send a system message, and instruct the terminal device to perform the 2-step random access procedure and the 4-step random access procedure in parallel when the terminal device performs the subsequent access.

Alternatively, in the embodiment of the present application, the random access resources used for the 2-step random access procedure and the 4-step random access procedure may be configured by the network device, respectively.

The random access resources mentioned in the embodiments of the present application may include PRACH resources (may also be referred to as RACH Opportunity (RO)) and random access preambles.

The network device may configure a PRACH resource set and a random access preamble set for a 4-step random access procedure and a 2-step random access procedure, respectively.

Alternatively, in an embodiment of the present application, the network device may configure a common set of PRACH resources and/or a common set of random access preambles for a 4-step random access procedure and a 2-step random access procedure.

That is, for the terminal device, there may be the same set of random access preambles and/or the same set of PRACH resources.

Optionally, in the embodiment of the present application, when the terminal device selects the PRACH resource, SSB may be measured, and the PRACH resource may be selected according to the measurement result of the SSB. That is, there is a correspondence between the measurement result of SSB and PRACH resources, and PRACH resources may be selected according to the correspondence and the measurement result of SSB. The range of one SSB measurement result may correspond to a plurality of PRACH resources, that is, the terminal device may make a PRACH resource selection from among the plurality of PRACH resources when the SSB measurement result is within the range.

Alternatively, in the embodiment of the present application, when the terminal device performs the 2-step random access procedure and the 4-step random access procedure in parallel, one of the PRACH resource and the random access preamble used for transmitting the first-step message may be the same.

For example, PRACH resources for a 2-step random access procedure and a 4-step random access procedure are the same, but the random access preambles are different.

For example, PRACH resources for a 2-step random access procedure and a 4-step random access procedure are different, but the random access preamble is the same.

Optionally, in the embodiment of the present application, in the 2-step random access procedure, the random access resource may further include a PUSCH resource, and the PUSCH resource may be used to send the payload part in the first step message in the 2-step random access procedure.

Alternatively, in the embodiment of the present application, the terminal device may configure random access resources for one of the random access procedures, and may instruct and use a part of the random access resources configured by the random access procedure as random access resources of another random access procedure.

In one implementation manner, the network device may send third indication information to the terminal device, where the terminal device receives the third indication information sent by the network device, and the third indication information indicates the first random access resource of the 2-step random access procedure; the network device may send fourth indication information to the terminal device, where the terminal device receives the fourth indication information sent by the network device, and the fourth indication information indicates that a part of resources in the first random access resource are used as second random access resources in the 4-step random access procedure.

Wherein the fourth indication information indicates the partial resource as the second random access resource by: and configuring corresponding Physical Uplink Shared Channel (PUSCH) resources for other partial resources in the first random access resources, and not configuring corresponding PUSCH resources for the partial resources.

It should be understood that, in the embodiment of the present application, the fourth indication may further indicate the partial resource as the second random access resource by other means, for example, the partial resource may be indicated as the second random access resource by means of display.

In the embodiment of the application, the network equipment can also respectively configure random access resources for a 4-step random access process and a 2-step random access process.

Therefore, in the embodiment of the application, as the terminal equipment performs the 2-step random access process and the 4-step random access process in parallel, under the condition that one random access process realizes successful access, the other random access process which is performed is stopped, thereby increasing the success rate of access and reducing the time delay of successful access.

Fig. 10 is a schematic block diagram of a terminal device 600 according to an embodiment of the present application. The terminal device 600 comprises a random access unit 610. The random access unit 610 is configured to: 2 steps of random access process and 4 steps of random access process are performed in parallel; and stopping another random access procedure in progress in case of successful access through one of the 2-step random access procedure and the 4-step random access procedure.

Optionally, in an embodiment of the present application, the random access unit 610 is further configured to:

and in the case that one random access procedure of the 2-step random access procedure and the 4-step random access procedure fails to realize access, continuing the other random access procedure in progress.

after the first random access preamble is sent, a first frame listening window is opened for listening to a second step message in the 4-step random access process;

and after the first random access preamble and the first load part are sent, opening a second frame listening window for listening to a second step message in the 2-step random access process.

after the second random access preamble and the second load part are sent, a third frame listening window is opened for frame listening of a second step message in the 2-step random access process;

and after the third random access preamble is sent, opening a fourth frame listening window for listening to a second step message in the 4-step random access process.

Optionally, in the embodiment of the present application, a last step message of one random access procedure for implementing successful access carries first indication information, where the first indication information is used to indicate stopping another random access procedure;

the random access unit 610 is further configured to:

and stopping another random access process in progress according to the first indication information.

and when the state of the terminal equipment meets the specific state and/or the event triggering random access is a specific event, 2-step random access processes and 4-step random access processes are performed in parallel.

Optionally, in an embodiment of the present application, the specific event is:

Scheduling request of specific logic channel; or (b)

And (5) initial access.

Optionally, in an embodiment of the present application, the terminal device 600 further includes a receiving unit 620, configured to:

receiving second indication information sent by network equipment; wherein the second indication information indicates:

the specific state and/or the specific event; or,

receiving third indication information sent by network equipment, wherein the third indication information indicates a first random access resource of the 2-step random access process;

and receiving fourth indication information sent by the network equipment, wherein the fourth indication information indicates that part of resources in the first random access resources are used as second random access resources in the 4-step random access process.

Optionally, in an embodiment of the present application, the fourth indication information indicates the part of resources as the second random access resource by:

and configuring corresponding Physical Uplink Shared Channel (PUSCH) resources for other partial resources in the first random access resources, and not configuring corresponding PUSCH resources for the partial resources.

It should be understood that the terminal device 600 may be used to implement the corresponding operations implemented by the terminal device in the above-described method embodiments, and are not described herein for brevity.

Fig. 11 is a schematic block diagram of a network device 700 according to an embodiment of the present application. The network device 700 comprises a random access unit 710 for:

in case that one random access procedure of the 2-step random access procedure and the 4-step random access procedure, which are performed in parallel by the terminal device, achieves successful access, at least one of the following operations is performed:

stopping another random access procedure in progress and/or transmitting first indication information in one random access procedure for realizing successful access, wherein the first indication information is used for indicating the terminal equipment to stop another random access procedure.

Optionally, in an embodiment of the present application, the first step message in the 2-step random access procedure includes a first random access preamble and a first payload portion, where the first random access preamble transmitted in the 2-step random access procedure is multiplexed as the random access preamble in the first step message in the 4-step random access procedure.

Optionally, in an embodiment of the present application, the first step message in the 2-step random access procedure includes a second random access preamble and a second payload portion, and the first step message in the 4-step random access procedure includes a third random access preamble, and the second random access preamble and the third random access preamble are transmitted separately.

Optionally, in an embodiment of the present application, the network device 700 further includes a sending unit 720 configured to:

sending second indication information to the terminal equipment; wherein the second indication information indicates at least one of:

the terminal equipment performs a specific state which needs to be met by the 2-step random access process and the 4-step random access process in parallel;

triggering the terminal equipment to perform specific trigger events of a 2-step random access process and a 4-step random access process in parallel;

whether the various states of the terminal equipment are states required by the terminal equipment to perform 2-step random access processes and 4-step random access processes in parallel;

whether each event triggering random access triggers the terminal equipment to perform 2-step random access process and 4-step random access process in parallel.

transmitting third indication information, wherein the third indication information indicates a first random access resource of the 2-step random access process;

and sending fourth indication information, wherein the fourth indication information indicates that part of resources in the first random access resources are used as second random access resources in the 4-step random access process.

and configuring corresponding PUSCH resources for other partial resources in the first random access resources, and not configuring corresponding PUSCH resources for the partial resources.

It should be understood that the network device 700 may be used to implement the corresponding operations implemented by the network device in the above-described method embodiments, and are not described herein for brevity.

Fig. 12 is a schematic block diagram of a communication device 800 according to an embodiment of the present application. The communication device 800 shown in fig. 12 comprises a processor 810, from which the processor 810 may call and run a computer program to implement the method in an embodiment of the application.

Optionally, as shown in fig. 12, the communication device 800 may further comprise a memory 820. Wherein the processor 810 may call and run a computer program from the memory 820 to implement the method in embodiments of the present application.

Wherein the memory 820 may be a separate device from the processor 810 or may be integrated into the processor 810.

Optionally, as shown in fig. 12, the communication device 800 may further include a transceiver 830, and the processor 810 may control the transceiver 830 to communicate with other devices, and in particular, may send information or data to other devices, or receive information or data sent by other devices.

Among other things, transceiver 830 may include a transmitter and a receiver. Transceiver 830 may further include antennas, the number of which may be one or more.

Optionally, the communication device 800 may be specifically a network device in the embodiment of the present application, and the communication device 800 may implement a corresponding flow implemented by the network device in each method in the embodiment of the present application, which is not described herein for brevity.

Optionally, the communication device 800 may be specifically a mobile terminal/terminal device according to the embodiment of the present application, and the communication device 800 may implement a corresponding flow implemented by the mobile terminal/terminal device in each method according to the embodiment of the present application, which is not described herein for brevity.

Fig. 13 is a schematic structural diagram of a communication apparatus of an embodiment of the present application. The communication device 900 shown in fig. 13 includes a processor 910, and the processor 910 may call and execute a computer program from a memory to implement the method in the embodiment of the present application.

Optionally, as shown in fig. 13, the communication device 900 may further include a memory 920. Wherein the processor 910 may invoke and run a computer program from the memory 920 to implement the method in the embodiments of the present application.

Wherein the memory 920 may be a separate device from the processor 910 or may be integrated in the processor 910.

Optionally, the communication device 900 may also include an input interface 930. The processor 910 may control the input interface 930 to communicate with other devices or communication apparatuses, and specifically may acquire information or data sent by the other devices or communication apparatuses.

Optionally, the communication device 900 may also include an output interface 940. Wherein the processor 910 may control the output interface 940 to communicate with other devices or communication means, in particular, may output information or data to other devices or communication means.

Optionally, the communication device may be applied to the network device in the embodiment of the present application, and the communication device may implement a corresponding flow implemented by the network device in each method in the embodiment of the present application, which is not described herein for brevity.

Optionally, the communication device may be applied to a mobile terminal/terminal device in the embodiment of the present application, and the communication device may implement a corresponding flow implemented by the mobile terminal/terminal device in each method in the embodiment of the present application, which is not described herein for brevity.

It should be understood that the communication device according to the embodiments of the present application may be a chip, which may also be referred to as a system-on-chip, a chip system or a system-on-chip, etc.

It should be appreciated that the processor of an embodiment of the present application may be an integrated circuit chip having signal processing capabilities. In implementation, the steps of the above method embodiments may be implemented by integrated logic circuits of hardware in a processor or instructions in software form. The processor may be a general purpose processor, a digital signal processor (Digital Signal Processor, DSP), an application specific integrated circuit (Application Specific Integrated Circuit, ASIC), an off-the-shelf programmable gate array (Field Programmable Gate Array, FPGA) or other programmable logic device, discrete gate or transistor logic device, discrete hardware components. The disclosed methods, steps, and logic blocks in the embodiments of the present application may be implemented or performed. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like. The steps of the method disclosed in connection with the embodiments of the present application may be embodied directly in the execution of a hardware decoding processor, or in the execution of a combination of hardware and software modules in a decoding processor. The software modules may be located in a random access memory, flash memory, read only memory, programmable read only memory, or electrically erasable programmable memory, registers, etc. as well known in the art. The storage medium is located in a memory, and the processor reads the information in the memory and, in combination with its hardware, performs the steps of the above method.

It will be appreciated that the memory in embodiments of the application may be volatile memory or nonvolatile memory, or may include both volatile and nonvolatile memory. The nonvolatile Memory may be a Read-Only Memory (ROM), a Programmable ROM (PROM), an Erasable PROM (EPROM), an Electrically Erasable EPROM (EEPROM), or a flash Memory. The volatile memory may be random access memory (Random Access Memory, RAM) which acts as an external cache. By way of example, and not limitation, many forms of RAM are available, such as Static RAM (SRAM), dynamic RAM (DRAM), synchronous DRAM (SDRAM), double Data Rate SDRAM (Double Data Rate SDRAM), enhanced SDRAM (ESDRAM), synchronous DRAM (SLDRAM), and Direct RAM (DR RAM). It should be noted that the memory of the systems and methods described herein is intended to comprise, without being limited to, these and any other suitable types of memory.

It should be understood that the above memory is illustrative but not restrictive, and for example, the memory in the embodiments of the present application may be Static RAM (SRAM), dynamic RAM (DRAM), synchronous DRAM (SDRAM), double data rate SDRAM (DDR SDRAM), enhanced SDRAM (ESDRAM), synchronous Link DRAM (SLDRAM), direct RAM (DR RAM), and the like. That is, the memory in embodiments of the present application is intended to comprise, without being limited to, these and any other suitable types of memory.

The embodiment of the application also provides a computer readable storage medium for storing a computer program.

Optionally, the computer readable storage medium may be applied to a network device in the embodiment of the present application, and the computer program causes a computer to execute a corresponding flow implemented by the network device in each method in the embodiment of the present application, which is not described herein for brevity.

Optionally, the computer readable storage medium may be applied to a mobile terminal/terminal device in the embodiment of the present application, and the computer program causes a computer to execute a corresponding procedure implemented by the mobile terminal/terminal device in each method of the embodiment of the present application, which is not described herein for brevity.

The embodiment of the application also provides a computer program product comprising computer program instructions.

Optionally, the computer program product may be applied to a network device in the embodiment of the present application, and the computer program instructions cause a computer to execute corresponding processes implemented by the network device in each method in the embodiment of the present application, which are not described herein for brevity.

Optionally, the computer program product may be applied to a mobile terminal/terminal device in the embodiment of the present application, and the computer program instructions cause a computer to execute corresponding processes implemented by the mobile terminal/terminal device in each method of the embodiment of the present application, which are not described herein for brevity.

The embodiment of the application also provides a computer program.

Optionally, the computer program may be applied to a network device in the embodiment of the present application, and when the computer program runs on a computer, the computer is caused to execute a corresponding flow implemented by the network device in each method in the embodiment of the present application, which is not described herein for brevity.

Optionally, the computer program may be applied to a mobile terminal/terminal device in the embodiment of the present application, and when the computer program runs on a computer, the computer is caused to execute corresponding processes implemented by the mobile terminal/terminal device in each method in the embodiment of the present application, which is not described herein for brevity.

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 solution. 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 application.

It will be clear to those skilled in the art that, for convenience and brevity of description, specific working procedures of the above-described systems, apparatuses and units may refer to corresponding procedures in the foregoing method embodiments, and are not repeated herein.

In the several embodiments provided by the present application, it should be understood that the disclosed systems, devices, and methods may be implemented in other manners. For example, the apparatus embodiments described above are merely illustrative, e.g., the division of the units is merely a logical function division, and there may be additional divisions when actually implemented, e.g., multiple units or components may be combined or integrated into another system, or some features may be omitted or not performed. Alternatively, the coupling or direct coupling or communication connection shown or discussed with each other may be an indirect coupling or communication connection via some interfaces, devices or units, which may be in electrical, mechanical or other form.

The units described as separate units may or may not be physically separate, and units shown 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 may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

In addition, each functional unit in the embodiments of the present application may be integrated in one processing unit, or each unit may exist alone physically, or two or more units may be integrated in 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 this understanding, the technical solution of the present application may be embodied essentially or in a part contributing to the prior art or in a part of the technical solution, in the form of a software product stored in a storage medium, comprising several instructions for causing a computer device (which may be a personal computer, a server, a network device, etc.) to perform all or part of the steps of the method according to the embodiments of the present application. And the aforementioned storage medium includes: a usb disk, a removable hard disk, a Read-Only Memory (ROM), a random access Memory (Random Access Memory, RAM), a magnetic disk, or an optical disk, or other various media capable of storing program codes.

The foregoing is merely illustrative of the present application, and the present application is not limited thereto, and any person skilled in the art will readily recognize that variations or substitutions are within the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims

1. A method of communication, comprising:

the terminal equipment performs 2 steps of random access processes and 4 steps of random access processes in parallel;

in case that one random access procedure of the 2-step random access procedure and the 4-step random access procedure realizes successful access, the terminal device stops the other random access procedure in progress.

2. The method according to claim 1, wherein the method further comprises:

in case of an access failure of one of the 2-step random access procedure and the 4-step random access procedure, the terminal device continues the other random access procedure in progress.

3. The method according to claim 1 or 2, characterized in that the first step message in the 2-step random access procedure comprises a first random access preamble and a first payload portion, wherein the first random access preamble transmitted in the 2-step random access procedure is multiplexed as a random access preamble in the first step message in the 4-step random access procedure.

4. A method according to claim 3, wherein the terminal device performs 2-step random access procedures and 4-step random access procedures in parallel, comprising:

after the first random access preamble is sent, the terminal equipment opens a first frame listening window for listening to a second step message in the 4-step random access process;

after the first random access preamble and the first load part are sent, the terminal equipment starts a second frame listening window for listening to a second step message in the 2-step random access process.

5. The method according to claim 1 or 2, characterized in that the first step message in the 2-step random access procedure comprises a second random access preamble and a second payload portion, the first step message in the 4-step random access procedure comprises a third random access preamble, the second random access preamble and the third random access preamble being transmitted separately.

6. The method of claim 5, wherein the terminal device performs 2-step random access procedure and 4-step random access procedure in parallel, comprising:

after the second random access preamble and the second load part are sent, the terminal equipment starts a third frame listening window for listening to a second step message in the 2-step random access process;

7. Method according to claim 1 or 2, characterized in that the last step message of one random access procedure for realizing a successful access carries a first indication information for indicating to stop the other random access procedure;

the terminal device stops another random access procedure in progress, comprising:

and stopping another random access process in progress by the terminal equipment according to the first indication information.

8. The method according to claim 1 or 2, wherein the terminal device performs a 2-step random access procedure and a 4-step random procedure in parallel, comprising:

and when the state of the terminal equipment meets the specific state and/or the event triggering random access is a specific event, the terminal equipment performs 2-step random access process and 4-step random access process in parallel.

9. The method of claim 8, wherein the specific event is:

scheduling request of specific logic channel; or (b)

And (5) initial access.

10. The method according to claim 9, wherein the method further comprises:

the terminal equipment receives second indication information sent by the network equipment; wherein the second indication information indicates:

the specific state and/or the specific event; or,

whether the various states of the terminal equipment are states required by the terminal equipment to perform 2-step random access procedures and 4-step random access procedures in parallel, and/or whether each event triggering random access allows triggering the terminal equipment to perform 2-step random access procedures and 4-step random access procedures in parallel.

11. The method of claim 10, wherein the second indication information is carried in a system message or in radio resource control, RRC, dedicated signaling.

12. The method according to claim 1 or 2, characterized in that the method further comprises:

the terminal equipment receives third indication information sent by network equipment, wherein the third indication information indicates a first random access resource of the 2-step random access process;

and the terminal equipment receives fourth indication information sent by the network equipment, wherein the fourth indication information indicates that part of resources in the first random access resources are used as second random access resources in the 4-step random access process.

13. The method of claim 12, wherein the fourth indication information indicates the portion of resources as the second random access resources by:

14. A method of communication, comprising:

in case that the terminal device performs one random access procedure of the 2-step random access procedure and the 4-step random access procedure in parallel to achieve successful access, the network device performs at least one of the following operations:

the ongoing further random access procedure is stopped,

15. The method of claim 14, wherein the first step message in the 2-step random access procedure comprises a first random access preamble and a first payload portion, wherein the first random access preamble transmitted in the 2-step random access procedure is multiplexed as the random access preamble in the first step message in the 4-step random access procedure.

16. The method according to claim 14 or 15, characterized in that the first step message in the 2-step random access procedure comprises a second random access preamble and a second payload portion, the first step message in the 4-step random access procedure comprises a third random access preamble, the second random access preamble and the third random access preamble being transmitted separately.

17. The method according to claim 14 or 15, characterized in that the method further comprises:

the network equipment sends second indication information to the terminal equipment; wherein the second indication information indicates at least one of:

whether each event triggering random access allows triggering the terminal equipment to perform 2-step random access process and 4-step random access process in parallel.

18. The method of claim 17, wherein the second indication information is carried in a system message or in radio resource control, RRC, dedicated signaling.

19. The method according to claim 14 or 15, characterized in that the method further comprises:

the network equipment sends third indication information to the terminal equipment, wherein the third indication information indicates a first random access resource of the 2-step random access process;

and the network equipment sends fourth indication information, wherein the fourth indication information indicates that part of resources in the first random access resources are used as second random access resources in the 4-step random access process.

20. The method of claim 19, wherein the fourth indication information indicates the portion of resources as the second random access resources by:

21. A terminal device, comprising a random access unit configured to:

2 steps of random access process and 4 steps of random access process are performed in parallel; and

And stopping another random access process in progress in the case that one random access process of the 2-step random access process and the 4-step random access process realizes successful access.

22. The terminal device of claim 21, wherein the random access unit is further configured to:

and in the case that one of the 2-step random access procedure and the 4-step random access procedure fails in access, continuing the other random access procedure in progress.

23. The terminal device according to claim 21 or 22, characterized in that the first step message in the 2-step random access procedure comprises a first random access preamble and a first payload portion, wherein the first random access preamble transmitted in the 2-step random access procedure is multiplexed as a random access preamble in the first step message in the 4-step random access procedure.

24. The terminal device of claim 23, wherein the random access unit is further configured to:

25. The terminal device according to claim 21 or 22, characterized in that the first step message in the 2-step random access procedure comprises a second random access preamble and a second payload portion, the first step message in the 4-step random access procedure comprises a third random access preamble, the second random access preamble and the third random access preamble being transmitted separately.

26. The terminal device of claim 25, wherein the random access unit is further configured to:

27. A terminal device according to claim 21 or 22, characterized in that the last message of one random access procedure for which a successful access is achieved carries first indication information for indicating to stop the other random access procedure;

The random access unit is further configured to:

28. The terminal device according to claim 21 or 22, wherein the random access unit is further configured to:

29. The terminal device according to claim 28, wherein the specific event is:

scheduling request of specific logic channel; or (b)

And (5) initial access.

30. The terminal device of claim 29, further comprising a receiving unit configured to:

the specific state and/or the specific event; or,

31. The terminal device of claim 30, wherein the second indication information is carried in a system message or in radio resource control, RRC, dedicated signaling.

32. The terminal device according to claim 21 or 22, further comprising a receiving unit for:

33. The terminal device according to claim 32, wherein the fourth indication information indicates the partial resources as the second random access resources by:

34. A network device comprising a random access unit configured to:

The ongoing further random access procedure is stopped,

35. The network device of claim 34, wherein the first step message in the 2-step random access procedure comprises a first random access preamble and a first payload portion, wherein the first random access preamble transmitted in the 2-step random access procedure is multiplexed as the random access preamble in the first step message in the 4-step random access procedure.

36. The network device according to claim 34 or 35, characterized in that the first step message in the 2-step random access procedure comprises a second random access preamble and a second payload portion, the first step message in the 4-step random access procedure comprises a third random access preamble, the second random access preamble and the third random access preamble being transmitted separately.

37. The network device according to claim 34 or 35, further comprising a transmitting unit configured to:

38. The network device of claim 37, wherein the second indication information is carried in a system message or in radio resource control, RRC, dedicated signaling.

39. The network device according to claim 34 or 35, further comprising a transmitting unit configured to:

40. The network device of claim 39, wherein the fourth indication information indicates the portion of resources as the second random access resources by:

41. A terminal device, comprising: a processor and a transceiver for controlling the transceiver to perform the method of any one of claims 1 to 13.

42. A network device, comprising: a processor and a transceiver for controlling the transceiver to perform the method of any one of claims 14 to 20.

43. A communication device, comprising: a processor for calling and running a computer program from a memory, causing a chip-mounted device to perform the method of any one of claims 1 to 20 via a transceiver.

44. A computer readable storage medium storing a computer program for causing a computer to perform the method of any one of claims 1 to 20 via a transceiver.

45. A computer program, characterized in that the computer program causes a computer to perform the method according to any of claims 1 to 20 via a transceiver.