CN113678562A

CN113678562A - Communication method, terminal equipment and network equipment

Info

Publication number: CN113678562A
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: 2021-11-19
Anticipated expiration: 2039-03-25
Also published as: WO2020191599A1; CN113678562B

Abstract

The embodiment of the application provides a communication method, a terminal device and a network device, which can reduce communication delay in a random access process and improve a success rate of random access in the random access process. The method comprises the following steps: the terminal equipment performs 2-step random access process and 4-step random access process in parallel; and under the condition that successful access is realized through one random access process of the 2-step random access process and the 4-step random access process, the terminal equipment stops the other ongoing random access process.

Description

Communication method, terminal equipment and network equipment

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, and therefore how to reduce the communication delay in the random access process is an urgent problem to be solved.

Disclosure of Invention

The embodiment of the application provides a communication method, a terminal device and a network device, which can reduce communication delay in a random access process and improve a 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-step random access process and 4-step random access process in parallel; and under the condition that successful access is realized through one random access process of the 2-step random access process and the 4-step random access process, the terminal equipment stops the other ongoing random access process.

In a second aspect, a communication method is provided, including: under the condition that one random access process of a 2-step random access process and a 4-step random access process which are performed by the terminal equipment in parallel realizes successful access, the network equipment executes at least one of the following operations: stopping another random access process in progress, and/or sending first indication information in a random access process realizing successful access, wherein the first indication information is used for indicating the terminal equipment to stop another random access process.

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

In particular, 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 of 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 used for storing a computer program, and the processor is used for calling and running the computer program stored in the memory, and controlling the transceiver to execute the method in the first aspect or the second aspect.

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

Specifically, the chip includes: a processor for calling and running the computer program from the memory so that the device on which the chip is installed performs the method of the first or second aspect through the transceiver.

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

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

Through the technical scheme, the terminal equipment performs the 2-step random access process and the 4-step random access process in parallel, and stops the other random access process under the condition that one random access process achieves successful access, so that the access success rate 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 provided in 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 (RAR) structure.

Figure 5 is a schematic diagram of a RAR structure.

Figure 6 is a schematic diagram of a RAR structure.

Figure 7 is a schematic diagram of a 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 provided according to an embodiment of the present application.

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

Detailed Description

Technical solutions in the embodiments of the present application will be described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. 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 application.

The technical scheme of the embodiment of the application can be applied to various communication systems, for example: a Global System for Mobile communications (GSM) System, a Code Division Multiple Access (CDMA) System, a Wideband Code Division Multiple Access (WCDMA) System, a General Packet Radio Service (GPRS), a Long Term Evolution (Long Term Evolution, LTE) System, an LTE Frequency Division Duplex (FDD) System, an LTE Time Division Duplex (TDD), a Universal Mobile Telecommunications System (UMTS), a Worldwide Interoperability for Microwave Access (WiMAX) communication System, or a 5G System.

Illustratively, a communication system 100 applied in the embodiment of the present application 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, a terminal). Network device 110 may provide communication coverage for a particular geographic area and may communicate with terminal devices located within that coverage area. Optionally, the Network device 110 may be a Base Transceiver Station (BTS) in a GSM system or a CDMA system, a Base Station (NodeB, NB) in a WCDMA system, an evolved Node B (eNB or eNodeB) in an LTE system, or a wireless controller in a Cloud Radio Access Network (CRAN), or may be a Network device in a Mobile switching center, a relay Station, an Access point, a vehicle-mounted 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 Public Land Mobile Network (PLMN) for future evolution, or the like.

The communication system 100 further comprises at least one terminal device 120 located within the coverage area of the network device 110. As used herein, "terminal equipment" includes, but is not limited to, connections via wireline, such as Public Switched Telephone Network (PSTN), Digital Subscriber Line (DSL), Digital cable, direct cable connection; and/or another data connection/network; and/or via a Wireless interface, e.g., to a cellular Network, a Wireless Local Area Network (WLAN), a digital television Network such as a DVB-H Network, a satellite Network, an AM-FM broadcast transmitter; and/or means of another terminal device arranged to receive/transmit communication signals; and/or Internet of Things (IoT) devices. A terminal device arranged to communicate over a wireless interface may be referred to as a "wireless communication terminal", "wireless terminal", or "mobile terminal". Examples of mobile terminals include, but are not limited to, satellite or cellular telephones; personal Communications Systems (PCS) terminals that may combine cellular radiotelephones with data processing, facsimile, and data Communications capabilities; PDAs that may include radiotelephones, pagers, internet/intranet access, Web browsers, notepads, calendars, and/or Global Positioning System (GPS) receivers; and conventional laptop and/or palmtop receivers or other electronic devices that include a radiotelephone transceiver. Terminal Equipment 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 (SIP) phone, a Wireless Local Loop (WLL) station, a Personal Digital Assistant (PDA), a handheld device having Wireless communication capabilities, a computing device or other processing device connected to a Wireless modem, a vehicle mounted device, a wearable device, a terminal device in a 5G network, or a terminal device in a future evolved PLMN, etc.

Optionally, a Device to Device (D2D) communication may be performed between the terminal devices 120.

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

Fig. 1 exemplarily shows one network device and two terminal devices, and optionally, the communication system 100 may include a plurality of network devices and may include other numbers of terminal devices within the coverage of each network device, which is not limited in this embodiment of the present application.

Optionally, the communication system 100 may further include other network entities such as a network controller, a mobility management entity, and the like, which is not limited in this embodiment.

It should be understood that a device having a communication function in a network/system in the embodiments 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 having a communication function, and the network device 110 and the terminal device 120 may be the 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 other network entities, for example, a network controller, a mobility management entity, and the like, which is not limited in this embodiment.

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

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

Specifically, the terminal device may select a 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. The terminal device may select a PRACH resource from the set of PRACH resources and may select a random access preamble from the set of random access preambles.

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

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 MSG3 transmission by the terminal device, and transmit the MSG2 based thereon.

The MSG2 may include a Physical Downlink Control Channel (PDCCH) and a Physical Downlink Shared Channel (PDSCH). The PDCCH may be scrambled by a Random Access Radio Network Temporary Identity (RA-RNTI), and the RA-RNTI may be obtained with a time-frequency resource selected by the terminal device to transmit 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 formula 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 can be as shown in fig. 4 to 7.

As shown in fig. 4, a Media Access Control (MAC) 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 subheader of the RAR may include a random access Backoff Index (BI) therein for indicating a Backoff time for retransmitting the first step message.

And as shown in fig. 6, a RAR identifier (RAR Identity, RAR id) is included in the subheader of the RAR, and the RAR id is used for indexing the random access preamble to which the network device responds.

As shown in fig. 7, the load of the RAR may include a Timing Advance Command field (Timing Advance Command) for adjusting uplink Timing, an uplink Grant (UL Grant) field, a Temporary Cell Radio Network Temporary Identity (TC-RNTI), and the like.

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

For the terminal device, after sending MSG1, a RAR listening window may be initiated, within which the terminal device may listen to the PDCCH, which the terminal device may descramble using the RA-RNTI. And acquiring the scheduled PDSCH based on the PDCCH obtained by descrambling.

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

Specifically, the terminal device may grant message 3 to the network device based on the resources in MSG 2. This message 3 may inform the network device of the triggering event of the terminal device triggering the random access.

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

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

The identification information can be carried in the fourth step message to solve the contention conflict, that is, the terminal device realizes the successful access.

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

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

For the terminal device, after sending the MSG3, a timer (e.g., Contention resolution timer) may be started to listen to the MSG 4.

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

Firstly, if the terminal equipment carries the C-RNTI in the MSG3, the MSG4 carries the PDCCH scheduling scrambled by the C-RNTI.

In a second mode, if the terminal equipment does not carry the C-RNTI in the MSG3, for example, the terminal equipment is subjected to random access triggered by initial access, the MSG4 carries out PDCCH scheduling scrambled by the TC-RNTI; the conflict may be resolved by the terminal device receiving the PDSCH in MSG4 by matching a Common Control Channel (CCCH) Service Data Unit (SDU) in the PDSCH.

The following table 1 shows contents required to be carried by each step of messages in a four-step random access process in a scenario of random access triggered by multiple events.

TABLE 1

The 4-step random access process is introduced above, and it should be understood that the content carried by each message in the 4-step random access process described above is only one implementation manner of the present application, and should not be particularly limited to this embodiment of the present application.

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 in turn receive the message a.

The MSGA may consist of a random access preamble and a payload part, which may carry information from the 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. The load part in the MSGA may be carried by a Physical Uplink Shared Channel (PUSCH).

In 302, the network device may transmit an MSGB to the terminal device, and the terminal device may receive the MSGB transmitted by the network device. The MSGB may include the contents of MSG2 and MSG4 in the 4-step stochastic process described above.

After the network device successfully analyzes the MSGA, the network device can send the MSGB to the terminal device, so that the contention conflict is solved. Wherein, the case that the network device receives the MSGA may be one of the following cases:

case 1: the network equipment successfully decodes the random access lead code;

case 2: the network equipment successfully decodes the random access lead code 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 can fall back to the 4-step random access process under the condition that the 2-step random access process does not realize successful access, which will increase the time delay of successful access.

The embodiment of the present application provides the following scheme, which can solve the above-mentioned problem of time delay.

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

In 410, the terminal device performs a 2-step random access procedure and a 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 being performed.

Specifically, since the terminal device performs the 2-step random access procedure and the 4-step random access procedure in parallel, and stops the other random access procedure when one random access procedure achieves successful access, 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 present application. The method 500 includes at least some of the following.

In 510, in a case that one of the 2-step random access procedure and the 4-step random access procedure performed in parallel by the terminal device achieves 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 a 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.

In the above, when 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 being performed is stopped, and in some cases, there may be an access failure in one of the random access procedures, and at this time, the network terminal device and the network device may continue the other random access procedure, so that the success rate of random access may be increased.

In order to more clearly understand the present application, embodiments of the present application will be described below, and the following description may be applied to the above-described method 400 and method 500.

The parallelism in 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.

When the terminal device performs the 2-step random access procedure and the 4-step random access procedure in parallel, it is likely that the 2-step random access procedure is used for realizing successful access, while the 4-step random access procedure is in progress, and when the 4-step random access procedure is realized, the terminal device may be in any one of the following procedures:

1) preparing a first step message

2) Sending a first step message

3) Waiting to listen for second step messages

4) Detecting second step messages

5) Preparing the third step message

6) Sending the third step message

7) Waiting to listen for the fourth step message

8) Detecting the fourth step message

The terminal device may be in any of the above processes, and the terminal device may terminate any of the ongoing processes in the 4-step random access process when the access is successfully achieved through the 2-step random access process.

Or, when the terminal device performs the 2-step random access procedure and the 4-step random access procedure in parallel, it may be the 4-step random access procedure to implement successful access, and the 2-step random access procedure is still in progress, and when the terminal device implements successful access, for the 2-step random access procedure, the terminal device may be in any one of the following procedures:

1) preparing a first step message

2) Sending a first step message

3) Waiting to listen for second step messages

4) Detecting second step messages

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

When the terminal device performs the 2-step random access procedure and the 4-step random access procedure in parallel, it is possible that the 2-step random access procedure is used for realizing successful access, while the 4-step random access procedure is in progress, and when the 4-step random access procedure is realized, the network device may be in any one of the following procedures:

1) preparing a second step message

3) Sending a second step message

4) Waiting for detection of the third step message

5) Detecting third step messages

6) Preparing a fourth message

7) Sending the fourth step message

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

Or, when the terminal device performs the 2-step random access procedure and the 4-step random access procedure in parallel, it may be the 4-step random access procedure to implement successful access, and the 2-step random access procedure is still in progress, and when the terminal device implements successful access, the network device may be in any one of the following procedures for the 2-step random access procedure:

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 network device may terminate any one of the ongoing processes in the 2-step random access process when the terminal device achieves successful access through the 4-step random access process.

Optionally, in this embodiment of the present application, it is mentioned above that after one of the random access procedures fails, the network device may also actively stop another random access procedure of the terminal device, at this time, the network device may further carry first indication information in a last message of one random access procedure that achieves successful access, and indicate to the terminal device to stop another random access procedure, for example, the first indication information may be carried in a second step message in a 2-step random access procedure or carried in a fourth step message in a 4-step random access procedure.

Or, in this embodiment of the present application, the network device may send only the first indication information, instead of 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 also actively stop only the ongoing random access procedure without sending the first indication information.

In the above, when 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 being performed is stopped, and in some cases, there may be an access failure in one of the random access procedures, and at this time, the terminal device may continue the other random access procedure, so that the success rate of random access may be increased.

In the embodiment of the present application, in which one random access procedure implements access failure while another random access procedure is in progress, the terminal device may reinitiate the one random access procedure with access failure.

Or, the terminal device may not re-initiate the random access procedure, but wait for a result of the another random access procedure, and if the another random access procedure does not achieve successful access, may re-initiate the random access procedure, where the re-initiated random access procedure may be a parallel 2-step random access procedure and 4-step random access procedure.

For example, the 2-step random access procedure is in progress, after the terminal device sends the message 1 of the 4-step random access procedure, if the MSG2 is not sensed in the sensing window, the 4-step random access procedure may fail, and the terminal device may reinitiate the 4-step random access procedure, that is, may retransmit the 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, the terminal device may initiate the random access procedure again, and the reinitiated random access procedure may be a parallel 2-step random access procedure and a 4-step random access procedure.

In the above, it is mentioned that the random access procedure may be retransmitted (where the retransmission of the random access procedure may refer to repeatedly performing the random access procedure), and both the 2-step random access procedure and the 4-step random access procedure mentioned in 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 a 2-step random access procedure and a 4-step random access procedure in parallel, and if the 4-step random access procedure fails, the 2-step random access procedure is in progress, the terminal device may reinitiate the 4-step random access procedure, and after reinitiating the 4-step random access procedure, the 2-step random access procedure fails, and the reinitiated 4-step random access procedure is in progress, the terminal device may reinitiate the 2-step random access procedure, and so on until the 2-step random access procedure and the 4-step random access procedure respectively reach respective corresponding maximum retransmission times, or until there is one random access procedure in the 2-step random access procedure and the 4-step random access procedure to achieve successful access.

In the above example, it is mentioned 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 one maximum retransmission time 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 retransmission number is 8, the total retransmission of the 2-step random access procedure and the 4-step random access procedure is not allowed to exceed 8, for example, if the 4-step random access procedure is retransmitted 5 times and the 2-step random access procedure is retransmitted 3 times, the maximum retransmission number is reached, the terminal device is no longer allowed to retransmit the random access procedure, and the terminal device may, for example, wait for a period of time and then perform random access.

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

Specifically, since both the 2-step random access procedure and the 4-step random access procedure include the random access preamble, the random access preamble transmitted at one time can be used as the random access preamble of the 2-step random access procedure and also as the preamble of the 4-step random access procedure. Or, it may also 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 sent on the same PRACH resource, so that the random access resource may be saved.

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

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

specifically, the terminal device may monitor the PDCCH scrambled by the RA-RNTI for receiving the RAR within the listening window, and if a subsequent correct RAR is received, transmit Msg3 and start a content resolution timer to monitor Msg 4.

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

Specifically, the terminal device may use the PDCCH scrambled by the RA-RNTI (if the first step message does not include the C-RNTI) or the PDCCH scrambled by the C-RNTI (if the second step message includes the C-RNTI) in the listening window for receiving the second step message.

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

Optionally, in this 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 part, and the first step message in the 4-step random access procedure includes a third random access preamble, where the second random access preamble and the third random access preamble are respectively transmitted.

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

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

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

For a network device, a second-step message of 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 of a 4-step random access procedure may be sent after parsing the third random access preamble.

The above-mentioned case that the 2-step random access procedure and the 4-step random access procedure share a random access preamble may occur in a first 2-step random access procedure and a 4-step random access procedure which are performed in parallel, and if one of the subsequent random access procedures fails, another random access procedure is performed, and at this time, the random access preamble may be transmitted for the one random access procedure, for example, the 2-step random access procedure first realizes access failure, while the 4-step random access procedure is in progress, the terminal device may transmit the random access preamble and a payload portion, and after the network device parses the random access preamble and the payload portion, only the second-step message in the 2-step random access procedure is transmitted, and the second-step message in the 4-step random access procedure is not transmitted any more.

In the embodiment of the application, when the terminal device can randomly access in any situation, the 2-step random access process and the 4-step random access process are performed in parallel. Or, the 2-step random access process and the 4-step random access process may be performed in parallel only when a certain condition is satisfied.

Specifically, when the state of the terminal device satisfies a specific state and/or an event triggering random access is a specific event, 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 as long as the state of the terminal is a specific state.

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

For example, when the state of the terminal device is a specific state and the event triggering random access is a specific event, the terminal device performs a 2-step random access event and a 4-step random access event.

The state of the terminal device mentioned in the embodiment of the present application may be an idle state, a connected state, an inactive state (inactive), and the like.

Wherein the specific state may comprise 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 (Initial access from RRC IDLE);

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

handover (Handover);

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

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

request for Other system information (Request for Other SI).

In the embodiment of the present application, the above trigger events may be further subdivided.

For example, the data arrival during the RRC connected state triggers random access which can be further divided into Scheduling Request (SR) triggered random access of different logical channels.

In this embodiment, when the trigger event is a specific trigger event, the terminal device may perform a 2-step random access procedure and a 4-step random access procedure in parallel.

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

Optionally, in this embodiment of the application, in some cases, the condition that needs to be satisfied when the aforementioned 2-step random access procedure and 4-step random access procedure are performed in parallel may be preset on the terminal device or configured by the network device.

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

the particular state and/or the particular event; alternatively, the first and second electrodes may be,

whether various states of the terminal equipment are states required by the terminal equipment to perform the 2-step random access process and the 4-step random access process in parallel, and/or whether various events triggering random access trigger the terminal equipment to perform the 2-step random access process and the 4-step random access process in parallel.

In particular, the network device may configure the terminal device with the above-mentioned specific states and/or specific events, that is, 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 each event triggering random access to the terminal device whether to trigger parallel 2-step random access procedure and 4-step random access procedure.

Optionally, in this 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 send a system message that may indicate which RRC state terminal device may perform the 2-step random access procedure and the 4-step random access procedure in parallel.

For example, the network device may indicate, through RRC dedicated signaling, whether the terminal device capable of performing the 2-step random access procedure and the 4-step random access procedure in parallel in the connected state allows performing the 2-step random access procedure and the 4-step random access procedure in parallel.

For example, the network device may indicate which logical channel SRs allow for parallel 2-step and 4-step random access procedures, e.g., a logical channel allowing URLLC traffic may trigger parallel 2-step and 4-step random access procedures.

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

Optionally, in this embodiment of the present application, there may also be no specific state or specific trigger event, but the terminal device may send a system message to indicate that, when the terminal device performs subsequent access, the 2-step random access process and the 4-step random access process may be performed in parallel.

Optionally, in this 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 resource mentioned in the embodiments of the present application may include a PRACH resource (which may also be referred to as a RACH Opportunity (RO)) and a random access preamble.

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 this 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 the 4-step random access procedure and the 2-step random access procedure.

That is, it may be possible for the terminal devices to have the same set of random access preambles and/or the same set of PRACH resources.

Optionally, in this embodiment of the present application, when the terminal device selects the PRACH resource, the SSB may be measured, and the PRACH resource may be selected according to a measurement result of the SSB. That is, there is a corresponding relationship between the measurement result of the SSB and the PRACH resource, and the PRACH resource may be selected according to the corresponding relationship and the measurement result of the SSB. A range of SSB measurements may correspond to a plurality of PRACH resources, that is, the terminal device may select a PRACH resource from the plurality of PRACH resources when the SSB measurements are within the range.

Optionally, in this 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 sending the first-step message may be the same.

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

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

Optionally, in this 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 a load part in the first step message in the 2-step random access procedure.

Optionally, in this embodiment of the present application, the terminal device may configure a random access resource for one of the random access procedures, and may indicate and use a part of the random access resource configured by the random access procedure as a random access resource 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 process; 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 the resources in the first random access resources is used as second random access resources in the 4-step random access process.

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 part of resources in the first random access resource, and not configuring corresponding PUSCH resources for the part of resources.

It should be understood that, in the embodiment of the present application, the fourth indication may also indicate the part of resources as the second random access resource in other manners, for example, the part of resources may be indicated as the second random access resource in a display manner.

In this embodiment, the network device may further respectively configure the random access resources for the 4-step random access procedure and the 2-step random access procedure.

Therefore, in the embodiment of the present application, since the terminal device performs the 2-step random access procedure and the 4-step random access procedure in parallel, and stops the other random access procedure when one of the random access procedures achieves successful access, the success rate of access can be increased and the time delay of successful access can be reduced.

Fig. 10 is a schematic block diagram of a terminal device 600 according to an embodiment of the present application. The terminal device 600 includes a random access unit 610. The random access unit 610 is configured to: carrying out 2-step random access process and 4-step random access process 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 this embodiment of the present application, the random access unit 610 is further configured to:

and under the condition that one random access process in the 2-step random access process and the 4-step random access process realizes access failure, continuing the other ongoing random access process.

Optionally, in this embodiment of the present application, a first step message in the 2-step random access procedure includes a first random access preamble and a first payload part, 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.

after the first random access lead code is sent, a first frame listening window is opened for frame listening to the 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 frame 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, starting a third frame listening window for frame listening to 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 frame listening to the second-step message in the 4-step random access process.

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

the random access unit 610 is further configured to:

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

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

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

scheduling requests for specific logical channels; or

And (5) initial access.

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

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

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;

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

Optionally, in this embodiment of the application, 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 part of resources in the first random access resource, and not configuring corresponding PUSCH resources for the part of resources.

It should be understood that the terminal device 600 may be configured to implement the corresponding operations implemented by the terminal device in the foregoing method embodiments, and for brevity, no further description is provided here.

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:

under the condition that one random access process of a 2-step random access process and a 4-step random access process which are performed by the terminal equipment in parallel realizes successful access, at least one of the following operations is executed:

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

Optionally, in this 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 this 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 2-step random access process and 4-step random access process in parallel to meet specific states;

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

whether various states of the terminal equipment are states required by the terminal equipment for performing the 2-step random access process and the 4-step random access process in parallel or not;

whether each event triggering random access triggers the terminal equipment to perform a 2-step random access process and a 4-step random access process in parallel or not.

sending 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 the 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 resource, and not configuring corresponding PUSCH resources for the partial resources.

It should be understood that the network device 700 may be configured to implement the corresponding operations implemented by the network device in the foregoing method embodiments, and for brevity, the description is not repeated here.

Fig. 12 is a schematic structural 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, and the processor 810 can call and run a computer program from a memory to implement the method in the embodiment of the present application.

Optionally, as shown in fig. 12, the communication device 800 may also include a memory 820. From the memory 820, the processor 810 can call and run a computer program to implement the method in the embodiment of the present application.

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 specifically, may transmit information or data to the other devices or receive information or data transmitted by the other devices.

The transceiver 830 may include a transmitter and a receiver, among others. The transceiver 830 may further include one or more antennas.

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

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

Fig. 13 is a schematic configuration diagram of a communication device according to an embodiment of the present application. The communication apparatus 900 shown in fig. 13 includes a processor 910, and the processor 910 can call and run 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. From the memory 920, the processor 910 can call and run a computer program to implement the method in the embodiment of the present application.

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 in particular, may obtain information or data transmitted by other devices or communication apparatuses.

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

Optionally, the communication apparatus may be applied to the network device in the embodiment of the present application, and the communication apparatus may implement the corresponding process implemented by the network device in each method in the embodiment of the present application, and for brevity, no further description is given here.

Optionally, the communication apparatus may be applied to the mobile terminal/terminal device in the embodiment of the present application, and the communication apparatus may implement the corresponding process implemented by the mobile terminal/terminal device in each method in the embodiment of the present application, and for brevity, no further description is given here.

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

It should be understood that the processor of the embodiments 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 performed by integrated logic circuits of hardware in a processor or instructions in the form of software. The Processor may be a general purpose Processor, a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), an off-the-shelf Programmable Gate Array (FPGA) or other Programmable logic device, discrete Gate or transistor logic device, or discrete hardware components. The various methods, steps, and logic blocks disclosed 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 directly implemented by a hardware decoding processor, or implemented by a combination of hardware and software modules in the decoding processor. The software module may be located in ram, flash memory, rom, prom, or eprom, registers, etc. storage media as is well known in the art. The storage medium is located in a memory, and a processor reads information in the memory and completes the steps of the method in combination with hardware of the processor.

It will be appreciated that the memory in the embodiments of the subject application can be either volatile memory or nonvolatile memory, or can include both volatile and nonvolatile memory. The non-volatile Memory may be a Read-Only Memory (ROM), a Programmable ROM (PROM), an Erasable PROM (EPROM), an Electrically Erasable PROM (EEPROM), or a flash Memory. Volatile Memory can be Random Access Memory (RAM), which acts as external cache Memory. By way of example, but not limitation, many forms of RAM are available, such as Static random access memory (Static RAM, SRAM), Dynamic Random Access Memory (DRAM), Synchronous Dynamic random access memory (Synchronous DRAM, SDRAM), Double Data Rate Synchronous Dynamic random access memory (DDR SDRAM), Enhanced Synchronous SDRAM (ESDRAM), Synchronous link SDRAM (SLDRAM), and Direct Rambus 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 memories are exemplary but not limiting illustrations, for example, the memories in the embodiments of the present application may also be Static Random Access Memory (SRAM), dynamic random access memory (dynamic RAM, DRAM), Synchronous Dynamic Random Access Memory (SDRAM), double data rate SDRAM (DDR SDRAM), enhanced SDRAM (enhanced SDRAM, ESDRAM), Synchronous Link DRAM (SLDRAM), Direct Rambus RAM (DR RAM), and the like. That is, the memory in the 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 the computer program.

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

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

Embodiments of the present application also provide a computer program product comprising computer program instructions.

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

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

The embodiment of the application also provides a computer program.

Optionally, the computer program may be applied to the network device in the embodiment of the present application, and when the computer program runs on a computer, the computer is enabled to execute the corresponding process implemented by the network device in each method in the embodiment of the present application, and for brevity, details are not described here again.

Optionally, the computer program may be applied to the mobile terminal/terminal device in the embodiment of the present application, and when the computer program runs on a computer, the computer is enabled to execute the corresponding process implemented by the mobile terminal/terminal device in each method in the embodiment of the present application, which is not described herein again 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 implementation. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present application.

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

In the several embodiments provided in the present application, it should be understood that the disclosed system, apparatus and method may be implemented in other ways. For example, the above-described apparatus embodiments are merely illustrative, and for example, the division of the units is only one logical division, and other divisions may be realized in practice, for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form.

The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.

In addition, functional units in the embodiments of the present application may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit.

The functions, if implemented in the form of software functional units and sold or used as a stand-alone product, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present application or portions thereof that substantially contribute to the prior art may be embodied in the form of a software product stored in a storage medium and including instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the method according to the embodiments of the present application. And the aforementioned storage medium includes: various media capable of storing program codes, such as a usb disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk, or an optical disk.

The above description is only for the specific embodiments of the present application, but the scope of the present application is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present application, and shall be covered by 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

A method of communication, comprising:

the terminal equipment performs 2-step random access process and 4-step random access process in parallel;

and under the condition that successful access is realized through one random access process of the 2-step random access process and the 4-step random access process, the terminal equipment stops the other ongoing random access process.
The method of claim 1, further comprising:

and under the condition that one random access process of the 2-step random access process and the 4-step random access process fails to realize access, the terminal equipment continues to perform the other random access process.
The method according to claim 1 or 2, 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.
The method of claim 3, wherein the terminal device performs the 2-step random access procedure and the 4-step random access procedure in parallel, and comprises:

after the first random access lead code is sent, the terminal equipment opens a first frame listening window for frame 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, the terminal equipment starts a second frame listening window for frame listening to the second step message in the 2-step random access process.
The method according to claim 1 or 2, wherein the first step message in the 2-step random access procedure comprises a second random access preamble and a second payload portion, and wherein the first step message in the 4-step random access procedure comprises a third random access preamble, and wherein the second random access preamble and the third random access preamble are transmitted separately.
The method of claim 5, wherein the terminal device performs the 2-step random access procedure and the 4-step random access procedure in parallel, and comprises:

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

and after the third random access preamble is sent, the terminal device starts a fourth frame listening window for frame listening to the second step message in the 4-step random access process.
The method according to any one of claims 1 to 6, characterized in that first indication information is carried in a last step message of one random access procedure for realizing successful access, the first indication information is used for indicating to stop another random access procedure;

the terminal device stopping another random access process in progress, comprising:

and according to the first indication information, the terminal equipment stops another ongoing random access process.
The method according to any of claims 1 to 7, wherein the terminal device performs a 2-step random access procedure and a 4-step random access procedure in parallel, comprising:

and when the state of the terminal equipment meets a specific state and/or the event triggering random access is a specific event, the terminal equipment performs a 2-step random access process and a 4-step random access process in parallel.
The method of claim 8, wherein the specific event is:

scheduling requests for specific logical channels; or

And (5) initial access.
The method according to claim 8 or 9, characterized in that the method further comprises:

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

the particular state and/or the particular event; alternatively, the first and second electrodes may be,

whether various states of the terminal equipment are states required by the terminal equipment to perform the 2-step random access process and the 4-step random access process in parallel, and/or whether various events triggering random access trigger the terminal equipment to perform the 2-step random access process and the 4-step random access process in parallel.
The method of claim 10, wherein the second indication information is carried in a system message or in Radio Resource Control (RRC) dedicated signaling.
The method according to any one of claims 1 to 11, further comprising:

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 the resources in the first random access resources are used as second random access resources in the 4-step random access process.
The method of claim 12, 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 part of resources in the first random access resource, and not configuring corresponding PUSCH resources for the part of resources.
A method of communication, comprising:

under the condition that one random access process of a 2-step random access process and a 4-step random access process which are performed by the terminal equipment in parallel realizes successful access, the network equipment executes at least one of the following operations:

the ongoing further random access procedure is stopped,

and sending first indication information in a 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.
The method of claim 14, wherein a first step message in the 2-step random access procedure comprises a first random access preamble and a first payload portion, and 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.
The method according to claim 14 or 15, wherein the first step message in the 2-step random access procedure comprises a second random access preamble and a second payload portion, and wherein the first step message in the 4-step random access procedure comprises a third random access preamble, and wherein the second random access preamble and the third random access preamble are transmitted separately.
The method according to any one of claims 14 to 16, further comprising:

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

the terminal equipment performs 2-step random access process and 4-step random access process in parallel to meet specific states;

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

whether various states of the terminal equipment are states required by the terminal equipment for performing the 2-step random access process and the 4-step random access process in parallel or not;

whether each event triggering random access triggers the terminal equipment to perform a 2-step random access process and a 4-step random access process in parallel or not.
The method of claim 17, wherein the second indication information is carried in a system message or in Radio Resource Control (RRC) dedicated signaling.
The method according to any one of claims 14 to 18, further comprising:

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 the resources in the first random access resources are used as second random access resources in the 4-step random access process.
The method of claim 19, wherein the fourth indication information indicates the partial resource as the second random access resource by:

and configuring corresponding PUSCH resources for other partial resources in the first random access resource, and not configuring corresponding PUSCH resources for the partial resources.
A terminal device, comprising a random access unit configured to:

carrying out 2-step random access process and 4-step random access process in parallel; and

in case of successful access through one of the 2-step random access procedure and the 4-step random access procedure, stopping another random access procedure being performed.
The terminal device of claim 21, wherein the random access unit is further configured to:

and under the condition that one random access process in the 2-step random access process and the 4-step random access process realizes access failure, continuing the other ongoing random access process.
The terminal device according to claim 21 or 22, 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.
The terminal device of claim 23, wherein the random access unit is further configured to:

after the first random access lead code is sent, a first frame listening window is opened for frame listening to the 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 frame listening to a second step message in the 2-step random access process.
The terminal device of claim 21 or 22, wherein the first step message in the 2-step random access procedure comprises a second random access preamble and a second payload portion, wherein the first step message in the 4-step random access procedure comprises a third random access preamble, and wherein the second random access preamble and the third random access preamble are transmitted separately.
The terminal device of claim 25, wherein the random access unit is further configured to:

after the second random access preamble and the second load part are sent, starting a third frame listening window for frame listening to 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 frame listening to the second-step message in the 4-step random access process.
The terminal device according to any of claims 21 to 26, wherein a first indication information is carried in a last step message of one random access procedure for achieving successful access, the first indication information being used for indicating to stop another random access procedure;

the random access unit is further configured to:

and stopping another ongoing random access process according to the first indication information.
The terminal device according to any of claims 21 to 27, wherein the random access unit is further configured to:

and when the state of the terminal equipment meets a specific state and/or the event triggering random access is a specific event, performing a 2-step random access process and a 4-step random access process in parallel.
The terminal device according to claim 28, wherein the specific event is:

scheduling requests for specific logical channels; or

And (5) initial access.
The terminal device according to claim 28 or 29, further comprising a receiving unit configured to:

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

the particular state and/or the particular event; alternatively, the first and second electrodes may be,

whether various states of the terminal equipment are states required by the terminal equipment to perform the 2-step random access process and the 4-step random access process in parallel, and/or whether various events triggering random access trigger the terminal equipment to perform the 2-step random access process and the 4-step random access process in parallel.
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.
The terminal device according to any of claims 21 to 31, further comprising a receiving unit configured to:

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;

receiving fourth indication information sent by the network device, where the fourth indication information indicates that a part of the resources in the first random access resources are used as second random access resources in the 4-step random access process.
The terminal device of claim 32, 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 part of resources in the first random access resource, and not configuring corresponding PUSCH resources for the part of resources.
A network device, comprising a random access unit configured to:

under the condition that one random access process of a 2-step random access process and a 4-step random access process which are performed by the terminal equipment in parallel realizes successful access, at least one of the following operations is executed:

the ongoing further random access procedure is stopped,

and sending first indication information in a 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.
The network device of claim 34, wherein a 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.
The network device of claim 34 or 35, wherein a first step message in the 2-step random access procedure comprises a second random access preamble and a second payload portion, and wherein a first step message in the 4-step random access procedure comprises a third random access preamble, and wherein the second random access preamble and the third random access preamble are transmitted separately.
The network device according to any of claims 34 to 36, further comprising a sending unit configured to:

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

the terminal equipment performs 2-step random access process and 4-step random access process in parallel to meet specific states;

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

whether various states of the terminal equipment are states required by the terminal equipment for performing the 2-step random access process and the 4-step random access process in parallel or not;

whether each event triggering random access triggers the terminal equipment to perform a 2-step random access process and a 4-step random access process in parallel or not.
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.
The network device according to any of claims 34 to 38, further comprising a sending unit configured to:

sending 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 the resources in the first random access resources are used as second random access resources in the 4-step random access process.
The network device of claim 39, wherein the fourth indication information indicates the partial resource as the second random access resource by:

and configuring corresponding PUSCH resources for other partial resources in the first random access resource, and not configuring corresponding PUSCH resources for the partial resources.
A terminal device, comprising: a processor and a transceiver, the processor being configured to control the transceiver to perform the method of any of claims 1 to 13.
A network device, comprising: a processor and a transceiver, the processor to control the transceiver to perform the method of any of claims 14 to 20.
A communications apparatus, comprising: a processor for calling and running a computer program from a memory so that a device in which the chip is installed performs the method of any one of claims 1 to 20 through a transceiver.
A computer-readable storage medium for storing a computer program which causes a computer to perform the method of any one of claims 1 to 20 via a transceiver.
A computer program product comprising computer program instructions for causing a computer to perform the method of any one of claims 1 to 20 via a transceiver.
A computer program, characterized in that the computer program causes a computer to perform the method of any of claims 1 to 20 via a transceiver.