CN111726884B - An instruction method and device - Google Patents

Abstract

Embodiments of the present invention provide an indication method and device. The method includes: when CFRA resources cannot meet the needs of multiple terminals in which handover occurs, sending indication information to the multiple terminals, where the indication information explicitly indicates or implicitly The formula indicates the start time for the multiple terminals to perform the CBRA procedure. In this embodiment of the present invention, when the CFRA resources cannot meet the needs of multiple terminals that are handed over, the network device sends indication information to the multiple terminals, and the indication information explicitly or implicitly instructs the multiple terminals to start the CBRA process. Time, when multiple terminals initiate the CBRA process, at least some of the terminals initiate the CBRA process at different times, so as to reduce the generated collision and delay, and enable the CBRA process to proceed smoothly.

Description

An instruction method and device

technical field

Embodiments of the present invention relate to the field of communication technologies, and in particular, to an indication method and device.

Background technique

The Random Access (RA) process includes the following application scenarios:

(1) Initial access from the radio resource control idle state (RRC_IDLE), and radio resource control (RadioResource Control, RRC) connection establishment;

(2) Re-access after the radio link fails, that is, the RRC connection is reestablished;

(3) synchronizing with the target cell during the handover process;

(4) Downlink data arrives and the terminal air interface is in an uplink out-of-sync state;

(5) The uplink data arrives and the air interface of the terminal is in the uplink out-of-synchronization state, or it is not out of synchronization but needs to apply for uplink resources through the RA process;

(6) Assisted positioning, the network uses the RA process to obtain a timing advance (Timing Advance, TA).

Contention-based Random Access (CBRA) is applicable to the other 5 scenarios except assisted positioning, wherein for the scenarios of RRC connection establishment, RRC connection reestablishment and uplink data arrival, the RA process is autonomously triggered by the terminal; For the scenarios of handover and downlink data arrival, the base station instructs the terminal to initiate the RA process. In this case, the base station generally prefers contention-free random access (CFRA), and when CFRA resources are insufficient , the base station instructs the terminal to initiate a CBRA process.

In the existing handover scenario, when the CFRA resources are insufficient to be allocated, the terminal initiates a CBRA process according to the RRC signaling instruction of the base station. Currently, there is no processing method for multiple terminals to initiate CBRA at the same time. Multiple terminals initiate CBRA at the same time, which will cause the random access preamble (Random Access Preamble, RAP) transmission of message 1 (Msg1) to collide and conflict, resulting in increased terminal power consumption, affecting the smooth progress of the CBRA process, and thus affecting the timing of the entire synchronization process. ductility is affected.

SUMMARY OF THE INVENTION

Embodiments of the present invention provide an indication method and device to solve the problem of collision when multiple terminals simultaneously perform a CBRA process.

According to a first aspect of the embodiments of the present invention, an indication method is provided, which is applied to a network device. The method includes: when the non-contention random access CFRA resources cannot meet the needs of multiple terminals in which handover occurs, sending an instruction to the multiple terminals. Each terminal sends indication information, where the indication information explicitly indicates or implicitly indicates the start time of the multiple terminals to perform the contention-based random access CBRA procedure.

Optionally, before the indication information is sent to the terminal where the handover occurs, the method further includes: notifying the MAC layer of the relevant information of the terminal that needs to perform the CBRA process through the radio resource control RRC signaling.

Optionally, the sending of indication information to multiple terminals, where the indication information explicitly or implicitly instructs the multiple terminals to perform a start time of the contention-based random access CBRA procedure, includes: using a physical downlink control channel The PDCCH sends the indication information to the multiple terminals, where the indication information implicitly indicates the start time for the multiple terminals to perform CBRA, and the PDCCH is scrambled by a predefined wireless network temporary identifier RNTI.

Optionally, the indication information includes: a fallback indication BI parameter, where the BI parameter is used by the multiple terminals to determine the start time of executing CBRA.

Optionally, the indication information is downlink control information DCI, the BI parameter is a BI field in the DCI, and the DCI is scrambled by the predefined RNTI.

According to a second aspect of the embodiments of the present invention, an indication method is provided, which is applied to a terminal. The method includes: receiving indication information from a network device, where the indication information explicitly or implicitly instructs the terminal to perform a CBRA process. Start time; according to the indication information, determine the start time of executing the CBRA process.

Optionally, the receiving indication information from a network device, where the indication information explicitly or implicitly indicates a start time for the terminal to perform a CBRA process, includes: receiving the indication information sent by the network device through a PDCCH, The indication information implicitly indicates the start time for the terminal to perform CBRA, and the PDCCH is scrambled by a predefined RNTI.

Optionally, the indication information includes: a BI parameter, where the BI parameter is used by the terminal to determine the start time of executing CBRA.

Optionally, the indication information is DCI, the BI parameter is a BI field in the DCI, and the DCI is scrambled by the predefined RNTI.

Optionally, determining the start time of executing the CBRA process according to the indication information includes: determining a second value according to the value of the BI parameter and a first value; determining the execution according to the second value The start time of the CBRA process.

According to a third aspect of the embodiments of the present invention, a network device is provided, including: a first transceiver and a first processor, wherein the first transceiver is used for multiple terminals that are handed over when CFRA resources cannot satisfy When required, send indication information to the multiple terminals, where the indication information explicitly indicates or implicitly indicates the start time for the multiple terminals to perform the CBRA process.

Optionally, the first processor is configured to notify the MAC layer of the relevant information of the terminal that needs to perform the CBRA process through RRC signaling.

Optionally, the first transceiver is further configured to send the indication information to the multiple terminals through the PDCCH, where the indication information implicitly indicates the start time for the multiple terminals to perform CBRA, and the PDCCH scrambled by a predefined RNTI.

Optionally, the indication information includes: a BI parameter, where the BI parameter is used by the multiple terminals to determine the start time of executing CBRA.

Optionally, the indication information is DCI, the BI parameter is a BI field in the DCI, and the DCI is scrambled by the predefined RNTI.

According to a fourth aspect of the embodiments of the present invention, a terminal is provided, including: a second transceiver and a second processor, wherein the second transceiver is configured to receive indication information from a network device, and the indication information displays The starting time of executing the CBRA process is explicitly or implicitly instructed by the terminal; the second processor is configured to determine the starting time of executing the CBRA process according to the indication information.

Optionally, the second transceiver is further configured to receive the indication information sent by the network device through a PDCCH, where the indication information implicitly indicates the start time for the terminal to perform CBRA, and the PDCCH is predefined by RNTI scrambling.

Optionally, the indication information includes: a BI parameter, where the BI parameter is used by the terminal to determine the start time of executing CBRA.

Optionally, the indication information is DCI, the BI parameter is a BI field in the DCI, and the DCI is scrambled by the predefined RNTI.

Optionally, the second processor is configured to determine a second value according to the value of the BI parameter and the first value; the second processor is further configured to determine the second value according to the second value. The start time of the execution of the CBRA process.

According to a fifth aspect of the embodiments of the present invention, there is provided a communication device, including a processor, a memory, and a program stored on the memory and executable on the processor, when the program is executed by the processor Implement the steps of the indication method described in the first aspect, or the steps of the indication method described in the second aspect.

According to a sixth aspect of the embodiments of the present invention, a computer-readable storage medium is provided, where a computer program is stored on the computer-readable storage medium, and when the computer program is executed by a processor, the instruction method according to the first aspect is implemented steps, or, as described in the second aspect, the steps of the instruction method

In this embodiment of the present invention, when the CFRA resources cannot meet the needs of multiple terminals that are handed over, the network device sends indication information to the multiple terminals, and the indication information explicitly or implicitly instructs the multiple terminals to start the CBRA process. Time, when multiple terminals initiate the CBRA process, at least some of the terminals initiate the CBRA process at different times, so as to reduce the generated collision and delay, and enable the CBRA process to proceed smoothly.

Description of drawings

In order to illustrate the technical solutions of the embodiments of the present invention more clearly, the following briefly introduces the accompanying drawings that need to be used in the description of the embodiments of the present invention. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can also be obtained from these drawings without creative effort.

FIG. 1 is a schematic diagram of an architecture of a wireless communication system provided by an embodiment of the present invention;

FIG. 2 is one of the schematic flow charts of the indication method provided by the embodiment of the present invention;

3 is a second schematic flowchart of an indication method provided by an embodiment of the present invention;

FIG. 4 is a schematic structural diagram of a network device provided by an embodiment of the present invention;

5 is a schematic flowchart of a terminal provided by an embodiment of the present invention;

FIG. 6 is a schematic flowchart of a communication device provided by an embodiment of the present invention.

Detailed ways

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, but not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

In the embodiments of the present invention, words such as "exemplary" or "for example" are used to mean serving as an example, illustration or illustration. Any embodiments or designs described as "exemplary" or "such as" in the embodiments of the present invention should not be construed as preferred or advantageous over other embodiments or designs. Rather, the use of words such as "exemplary" or "such as" is intended to present the related concepts in a specific manner.

The techniques described herein are not limited to 5th-generation (5G) and later evolved communication systems, and not limited to LTE/LTE-advanced (LTE-Advanced, LTE-A) systems, and can also be used in various wireless communication systems, such as Code Division Multiple Access (CDMA), Time Division Multiple Access (TDMA), Frequency Division Multiple Access (FDMA), Orthogonal Frequency Division Multiple Access ( Orthogonal Frequency Division Multiple Access (OFDMA), Single-carrier Frequency-Division Multiple Access (SC-FDMA), and other systems.

The terms "system" and "network" are often used interchangeably. A CDMA system may implement radio technologies such as CDMA2000, Universal Terrestrial Radio Access (UTRA), and the like. UTRA includes Wideband Code Division Multiple Access (WCDMA) and other CDMA variants. A TDMA system may implement a radio technology such as the Global System for Mobile Communication (GSM). The OFDMA system can implement systems such as Ultra Mobile Broadband (UMB), Evolved UTRA ((Evolution-UTRA, E-UTRA)), IEEE 802.11 ((Wi-Fi)), IEEE 802.16 ((WiMAX)), IEEE802 .20, Flash-OFDM and other radio technologies. UTRA and E-UTRA are part of the Universal Mobile Telecommunications System (UMTS). LTE and higher LTE (eg LTE-A) are new UMTS releases that use E-UTRA. UTRA, E-UTRA, UMTS, LTE, LTE-A and GSM are described in documents from an organization named "3rd Generation Partnership Project" (3GPP). CDMA2000 and UMB are described in documents from an organization named "3rd Generation Partnership Project 2" (3GPP2). The techniques described herein may be used for both the systems and radio technologies mentioned above, as well as for other systems and radio technologies.

Referring to FIG. 1, an embodiment of the present invention provides a wireless communication system. As shown in FIG. 1 , the wireless communication system may include: network side equipment 11 and user equipment 12 . In practical applications, the connection between the above-mentioned various devices may be wireless connection. In order to conveniently and intuitively represent the connection relationship between the various devices, a solid line is used in FIG. 1 for illustration.

It should be noted that the above communication system may include multiple user equipments, and the network side equipment may communicate with multiple user equipments (transmit signaling or transmit data).

The above-mentioned network-side device may be a network-side device (for example, a next generation node base station (gNB) or a transmission and reception point (transmission and reception point) in a 5G (Fifth-generation, fifth-generation mobile communication technology) system. TRP)) and other equipment.

The above-mentioned user equipment may be a mobile phone, a tablet computer, a notebook computer, an Ultra-Mobile Personal Computer (UMPC), a netbook, or a Personal Digital Assistant (PDA).

It should be noted that, for the handover scenario, if only one terminal is handed over, if the CFRA resources are sufficient, the network device instructs the terminal to perform the CFRA process through RRC signaling, otherwise it instructs the terminal to perform the CBRA process; If the CFRA resources are sufficient, the network device instructs the multiple terminals to perform the CFRA process through RRC signaling.

Referring to FIG. 2 , an embodiment of the present invention provides an indication method, the execution subject of the method is a network device, and the specific steps of the method are as follows:

Step 201 : when the CFRA resources cannot meet the requirements of the multiple terminals in which the handover occurs, send indication information to the multiple terminals, and the indication information explicitly or implicitly indicates the start time of the multiple terminals to perform the CBRA process.

In this embodiment of the present invention, when the CFRA resources cannot meet the needs of multiple terminals that are handed over, the network device sends indication information to the multiple terminals, instructing the multiple terminals to perform the CBRA process, and the indication information explicitly indicates or implicitly Indicates the start time for multiple terminals to perform the CBRA procedure. The display indication may be to directly send the designated CBRA process start time to each terminal, and the implicit indication may be to send an intermediate parameter to each terminal, and the terminal randomly determines the start time of the terminal to execute the CBRA process according to the intermediate parameter.

For example, there are 5 terminals that need to perform the CBRA process, these 5 terminals receive instruction information from the network device, and each terminal randomly determines the start time of the CBRA process according to the instruction information, so that at least some of the 5 terminals can perform CBRA. The start time of the process is different, thereby reducing the collision generated when the terminal performs the CBRA process.

Optionally, before the network device sends the indication information to the terminal, it notifies the media access control (Media Access Control, MAC) layer of the relevant information of the terminal that needs to perform the CBRA process through RRC signaling, and the relevant information may be the identification code of the terminal ( Identity, ID), the related information may also be other information, and the content of the related information is not specifically limited in this embodiment of the present invention. In this way, the MAC layer can learn the information of the terminal performing the CBRA procedure.

Optionally, the network device sends indication information to multiple terminals where handover occurs through a physical downlink control channel (Physical Downlink Control Channel, PDCCH). The network temporary identifier (Radio Network TemporaryIdentifier, RNTI) is scrambled.

In this embodiment of the present invention, an RNTI is predefined, and the predefined RNTI may be called a handover RNTI (Handover RNTI, HO-RNTI).

It can be understood that, when the network device interacts with the terminal, the network device scrambles the PDCCH through the RNTI and sends information to the terminal, and accordingly the terminal performs descrambling through the RNTI to obtain the information sent by the network device. Different RNTIs correspond to different execution processes. Since in the existing handover scenario, there is no processing method for initiating the CBRA process for multiple terminals, there is no corresponding RNTI, so one RNTI, ie HO-RNTI, is predefined for this scenario.

The above-mentioned indication information may include a backoff indicator (Backoff Indicator, BI), and the BI parameter is used to determine the start time of executing CBRA for multiple terminals that are handed over.

Specifically, the indication information may be downlink control information (Downlink Control Information, DCI), the BI parameter may be a Backoff Indicator field defined in the DCI, and the DCI is scrambled by a predefined RNTI (HO-RNTI).

The length of the Backoff Indicator field may be 4 bits, and the embodiment of the present invention does not specifically limit the length of the Backoff Indicator field.

In this embodiment of the present invention, when the CFRA resources cannot meet the needs of multiple terminals that are handed over, the network device sends indication information to the multiple terminals, and the indication information explicitly or implicitly instructs the multiple terminals to start the CBRA process. Time, when multiple terminals initiate the CBRA process, at least some of the terminals initiate the CBRA process at different times, so as to reduce the generated collision and delay, and enable the CBRA process to proceed smoothly.

Further, by reducing the collision, the power consumption of the terminal can be reduced.

Referring to FIG. 3 , an embodiment of the present invention provides an indication method, where the execution subject of the method is a terminal, and the specific steps of the method are as follows:

Step 301: Receive indication information from the network device, and the indication information explicitly or implicitly instructs the terminal to execute the start time of the CBRA process;

In this embodiment of the present invention, the indication information is used to explicitly indicate or implicitly indicate the start time for multiple terminals to perform the CBRA process. The display indication may be the start time of the specified CBRA process that the network device directly sends to the terminal, and the implicit indication may be that the network device sends an intermediate parameter to the terminal, and the terminal randomly determines the start time of the CBRA process by itself according to the intermediate parameter.

For example, there are 5 terminals that need to perform the CBRA process, these 5 terminals receive instruction information from the network device, and each terminal randomly determines the start time of the CBRA process according to the instruction information, so that at least some of the 5 terminals can perform CBRA. The start time of the process is different, thereby reducing the collision generated when the terminal performs the CBRA process.

Optionally, the terminal receives indication information from the network device through a PDCCH, where the indication information implicitly indicates the start time for the terminal to perform CBRA, and the PDCCH is scrambled by a predefined RNTI.

In the embodiment of the present invention, a wireless network temporary identifier RNTI is predefined, and the RNTI may be called HO-RNTI.

It can be understood that, when the network device interacts with the terminal, the network device scrambles the PDCCH through the RNTI and sends information to the terminal, and accordingly the terminal performs descrambling through the RNTI to obtain the information sent by the network device. Different RNTIs correspond to different execution processes. Since in the existing handover scenario, there is no processing method for initiating the CBRA process for multiple terminals, there is no corresponding RNTI, so one RNTI, ie HO-RNTI, is predefined for this scenario.

The above-mentioned indication information includes BI, and the BI parameter is used for multiple terminals that are handed over to determine the start time of executing CBRA.

Specifically, the indication information is DCI, the BI parameter is the Backoff Indicator field defined in the DCI, and the DCI is scrambled by a predefined RNTI (HO-RNTI).

Optionally, the length of the Backoff Indicator field is 4 bits, and this embodiment of the present invention does not specifically limit the length of the Backoff Indicator field.

Step 302: Determine the start time of executing the CBRA process according to the indication information;

In this embodiment of the present invention, the terminal determines the start time of its own execution of the CBRA process according to the indication information sent by the network device.

Specifically, the indication information is DCI, the indication information includes BI parameters, and the terminal determines the start time of executing the CBRA process and includes the following steps:

(1) according to the value of the BI parameter and the first numerical value, determine the second numerical value;

In this embodiment of the present invention, the terminal randomly selects a second value between the value of the BI parameter and the first value. For example, the value of the BI parameter may be 10, the first value may be 0, and the second value may be is any number from 0 to 10, the value of the BI parameter and the first value may also be other values, and the embodiment of the present invention does not specifically limit the value and the first value of the BI parameter.

(2) Determine the start time for executing the CBRA process according to the second value.

In this embodiment of the present invention, the terminal determines the second value as its own fallback value, and determines the required fallback time before executing the CBRA process according to the fallback value. Taking the second value as 5 as an example: the terminal determines that the backoff value is 5 according to the second value, and further determines that the time required for backoff before executing the CBRA process is 5ms.

It can be understood that, since the second value is randomly selected, the second value selected by each terminal may be different. For example, the second value selected by the first terminal is 5, the second value selected by the second terminal is 7, the second value selected by the third terminal is 9, and so on.

In this way, different terminals have different back-off times before performing the CBRA process through the randomly selected second value, so as to avoid multiple terminals from performing the CBRA process at the same time as much as possible, and reduce the resulting collision.

In this embodiment of the present invention, when the CFRA resources cannot meet the needs of multiple terminals that are handed over, the network device sends indication information to the multiple terminals, and the indication information explicitly or implicitly instructs the multiple terminals to start the CBRA process. Time, when multiple terminals initiate the CBRA process, at least some of the terminals initiate the CBRA process at different times, so as to reduce the generated collision and delay, and enable the CBRA process to proceed smoothly.

Further, by reducing the collision, the power consumption of the terminal can be reduced.

Referring to FIG. 4, an embodiment of the present invention provides a network device 400, including: a first transceiver 401 and a first processor 402;

Wherein, the first transceiver 401 is configured to send indication information to the multiple terminals when the CFRA resources cannot meet the requirements of the multiple terminals in which the handover occurs, and the indication information explicitly or implicitly indicates the The start time of the CBRA procedure performed by multiple terminals.

Optionally, the first processor 402 is configured to notify the MAC layer of relevant information of the terminal that needs to perform the CBRA process through RRC signaling.

Optionally, the first transceiver 401 is further configured to send the indication information to the multiple terminals through the PDCCH, where the indication information implicitly indicates the start time for the multiple terminals to perform CBRA, the The PDCCH is scrambled by a predefined RNTI.

Optionally, the indication information includes: a BI parameter, where the BI parameter is used by the multiple terminals to determine the start time of executing CBRA.

Optionally, the indication information is DCI, the BI parameter is a BI field in the DCI, and the DCI is scrambled by the predefined RNTI.

In this embodiment of the present invention, when the CFRA resources cannot meet the needs of multiple terminals that are handed over, the network device sends indication information to the multiple terminals, and the indication information explicitly or implicitly instructs the multiple terminals to start the CBRA process. Time, when multiple terminals initiate the CBRA process, at least some of the terminals initiate the CBRA process at different times, so as to reduce the generated collision and delay, and enable the CBRA process to proceed smoothly.

Further, by reducing the collision, the power consumption of the terminal can be reduced.

Referring to FIG. 5, an embodiment of the present invention provides a terminal 500, including: a second transceiver 501 and a second processor 502;

Wherein, the second transceiver 501 is configured to receive indication information from a network device, where the indication information explicitly or implicitly indicates the start time for the terminal to perform the CBRA process;

The second processor 502 is configured to determine the start time of executing the CBRA process according to the indication information.

Optionally, the second transceiver 501 is further configured to receive the indication information from the network device through a PDCCH, where the PDCCH is scrambled by a predefined RNTI.

Optionally, the indication information includes: a BI parameter, where the BI parameter is used by the terminal to determine the start time of executing CBRA.

Optionally, the indication information is DCI, the BI parameter is a BI field in the DCI, and the DCI is scrambled by the predefined RNTI.

Optionally, the second processor 502 is configured to determine a second value according to the value of the BI parameter and the first value;

The second processor 502 is further configured to determine the start time of the CBRA process according to the second value.

In this embodiment of the present invention, when the CFRA resources cannot meet the needs of multiple terminals that are handed over, the network device sends indication information to the multiple terminals, and the indication information explicitly or implicitly instructs the multiple terminals to start the CBRA process. Time, when multiple terminals initiate the CBRA process, at least some of the terminals initiate the CBRA process at different times, so as to reduce the generated collision and delay, and enable the CBRA process to proceed smoothly.

Further, by reducing the collision, the power consumption of the terminal can be reduced.

Referring to FIG. 6, an embodiment of the present invention provides another communication device 600, including: a processor 601, a transceiver 602, a memory 603, and a bus interface.

Among them, the processor 601 may be responsible for managing the bus architecture and general processing. Memory 603 may store data used by processor 601 in performing operations.

In this embodiment of the present invention, the communication device 600 may further include: a program stored in the memory 603 and executable on the processor 601, and when the program is executed by the processor 601, implements the steps of the method provided by the embodiment of the present invention.

In FIG. 6, the bus architecture may include any number of interconnected buses and bridges, in particular one or more processors represented by processor 601 and various circuits of memory represented by memory 603 linked together. The bus architecture can also link together various other circuits, such as peripheral devices, voltage regulators, and power management circuits, which are well known in the art, and therefore will not be further described in this embodiment of the present invention . The bus interface provides the interface. Transceiver 602 may be a number of elements, including a transmitter and a receiver, that provide a means for communicating with various other devices over a transmission medium.

Embodiments of the present invention further provide a computer-readable storage medium, where a computer program is stored on the computer-readable storage medium, and when the computer program is executed by a processor, each process of the foregoing method embodiment can be achieved, and the same technical effect can be achieved, In order to avoid repetition, details are not repeated here. The computer-readable storage medium is, for example, a read-only memory (Read-Only Memory, ROM for short), a random access memory (Random Access Memory, RAM for short), a magnetic disk, or an optical disk.

It should be noted that, herein, the terms "comprising", "comprising" or any other variation thereof are intended to encompass non-exclusive inclusion, such that a process, method, article or device comprising a series of elements includes not only those elements, It also includes other elements not expressly listed or inherent to such a process, method, article or apparatus. Without further limitation, an element qualified by the phrase "comprising a..." does not preclude the presence of additional identical elements in a process, method, article or apparatus that includes the element.

The embodiments of the present invention have been described above in conjunction with the accompanying drawings, but the present invention is not limited to the above-mentioned specific embodiments, which are merely illustrative rather than restrictive. Under the inspiration of the present invention, without departing from the spirit of the present invention and the scope protected by the claims, many forms can be made, which all belong to the protection of the present invention.

Claims (22)

1. An indication method applied to a network device, the method comprising:

when non-contention random access (CFRA) resources cannot meet the requirements of a plurality of terminals which are switched, indication information is sent to the plurality of terminals, the indication information explicitly or implicitly indicates the starting time of the plurality of terminals for executing a contention-based random access (CBRA) process, and the starting time of at least part of the terminals for executing the CBRA process is different.

2. The method of claim 1, wherein prior to the indication message being generated to the terminal where the handover occurred, the method further comprises:

and informing the media access control MAC layer of the relevant information of the terminal needing to execute the CBRA process through Radio Resource Control (RRC) signaling.

3. The method of claim 1, wherein the sending indication information to the plurality of terminals, the indication information explicitly indicating or implicitly indicating a start time for the plurality of terminals to perform a contention-based random access (CBRA) procedure comprises:

and sending the indication information to the plurality of terminals through a Physical Downlink Control Channel (PDCCH), wherein the indication information implicitly indicates the starting time of the plurality of terminals for executing CBRA, and the PDCCH is scrambled by a predefined Radio Network Temporary Identifier (RNTI).

4. The method of claim 3, wherein the indication information comprises: the fallback indicates a BI parameter for the plurality of terminals to determine a starting time to perform CBRA.

5. The method of claim 4, wherein the indication information is Downlink Control Information (DCI), wherein the BI parameter is a BI field in the DCI, and wherein the DCI is scrambled by the predefined RNTI.

6. An indication method applied to a terminal, the method comprising:

receiving indication information from a network device, wherein the indication information explicitly or implicitly indicates starting times of a plurality of terminals to execute a CBRA (Convergence random Access) process, and the starting times of at least some terminals in the plurality of terminals to execute the CBRA process are different;

and determining the starting time for executing the CBRA process according to the indication information.

7. The method of claim 6, wherein receiving the indication information from the network device comprises:

receiving the indication information from the network device through a PDCCH, the PDCCH being scrambled by a predefined RNTI.

8. The method of claim 7, wherein the indication information comprises: a BI parameter for the terminal to determine a start time for performing CBRA.

9. The method of claim 8, wherein the indication information is DCI, wherein the BI parameter is a BI field in the DCI, and wherein the DCI is scrambled by the predefined RNTI.

10. The method of claim 8, wherein the determining a starting time for performing a CBRA procedure according to the indication information comprises:

determining a second numerical value according to the value of the BI parameter and the first numerical value;

and determining the starting time of the execution of the CBRA process according to the second value.

11. A network device, comprising: a first transceiver and a first processor, wherein,

the first transceiver is configured to send, to a plurality of terminals that are handed over when CFRA resources cannot meet requirements of the plurality of terminals, indication information that explicitly or implicitly indicates start times at which the plurality of terminals perform a CBRA procedure, where the start times at which at least some of the plurality of terminals perform the CBRA procedure are different.

12. The network device of claim 11,

the first processor is configured to notify, through RRC signaling, the MAC layer of information related to a terminal that needs to perform a CBRA procedure.

13. The network device of claim 11,

the first transceiver is further configured to send the indication information to the plurality of terminals through a PDCCH, the indication information implicitly indicating a start time for the plurality of terminals to perform CBRA, and the PDCCH is scrambled by a predefined RNTI.

14. The network device of claim 13, wherein the indication information comprises: a BI parameter for the plurality of terminals to determine a start time for performing a CBRA.

15. The network device of claim 14, wherein the indication information is DCI, wherein the BI parameter is a BI field in the DCI, and wherein the DCI is scrambled by the predefined RNTI.

16. A terminal, comprising: a second transceiver and a second processor, wherein,

the second transceiver is configured to receive indication information from a network device, where the indication information explicitly or implicitly indicates start times of multiple terminals to perform a CBRA procedure, and the start times of at least some terminals in the multiple terminals to perform the CBRA procedure are different;

and the second processor is used for determining the starting time for executing the CBRA process according to the indication information.

17. The terminal of claim 16,

the second transceiver is further configured to receive the indication information from the network device through a PDCCH, the PDCCH being scrambled by a predefined RNTI.

18. The terminal according to claim 17, wherein the indication information comprises: a BI parameter for the terminal to determine a start time for performing CBRA.

19. The terminal of claim 18, wherein the indication information is DCI, wherein the BI parameter is a BI field in the DCI, and wherein the DCI is scrambled by the predefined RNTI.

20. The terminal of claim 18,

the second processor is used for determining a second numerical value according to the value of the BI parameter and the first numerical value;

the second processor is further configured to determine a start time for the execution of the CBRA procedure according to the second value.

21. A communication device comprising a processor, a memory and a program stored on the memory and executable on the processor, the program, when executed by the processor, implementing the steps of the indication method of any one of claims 1 to 5 or the steps of the indication method of any one of claims 6 to 10.

22. A computer-readable storage medium, characterized in that a computer program is stored on the computer-readable storage medium, which computer program, when being executed by a processor, carries out the steps of the indication method according to one of the claims 1 to 5 or the steps of the indication method according to one of the claims 6 to 10.

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