CN111050411B

CN111050411B - Random access method and device, storage medium and terminal

Info

Publication number: CN111050411B
Application number: CN201811188416.5A
Authority: CN
Inventors: 韩传华; 邓云
Original assignee: Spreadtrum Communications Shanghai Co Ltd
Current assignee: Spreadtrum Communications Shanghai Co Ltd
Priority date: 2018-10-12
Filing date: 2018-10-12
Publication date: 2022-03-18
Anticipated expiration: 2038-10-12
Also published as: CN111050411A

Abstract

A random access method and device, storage medium and terminal are provided, the method comprises: receiving indication information indicating one or more BWPs for transmitting a random access response; detecting the random access response in a random access search space on a target BWP, the target BWP including one or more BWPs indicated by the indication information or a preset one or more BWPs. The scheme provided by the invention can reasonably optimize the random access mechanism when a plurality of activated BWPs exist, improve the access efficiency of the UE and reduce the power consumption of the UE.

Description

Random access method and device, storage medium and terminal

Technical Field

The present invention relates to the field of communications technologies, and in particular, to a random access method and apparatus, a storage medium, and a terminal.

Background

With the development of wireless communication technology, the third Generation Partnership Project (3rd Generation Partnership Project, 3GPP) introduced a New Radio (NR, which may also be referred to as New air interface) technology. In Release 15 of NR (Release 15, abbreviated as R15), the concept of partial Bandwidth (BWP) is introduced, which is a subset of the entire cell Bandwidth.

According to the specification of the existing protocol, for a User Equipment (UE) in a Radio Resource Control (RRC) connected state, for each serving cell, a base station may configure one or more BWPs for the UE, but at most one BWP is active at the same time.

On the other hand, R15 further specifies that a connected UE can perform random access on a Special Cell (SpCell) and a Secondary serving Cell (SCell). For Random Access in the secondary serving Cell, the UE needs to receive a Random Access Response (RAR) on a special Cell in a Cell Group (Cell Group) where the SCell is located.

However, with the proposal of a design scheme supporting simultaneous activation of multiple BWPs by the serving cell. If there are multiple active BWPs in a special cell and there are multiple BWPs configured with a common search space for random access, the prior art does not provide a suitable processing mechanism for random access in the secondary serving cell, so that the UE cannot reasonably and accurately select a suitable BWP from the multiple active BWPs in the special cell to receive RAR.

Disclosure of Invention

The invention solves the technical problem of how to optimize the random access mechanism when a plurality of active BWPs exist, so as to improve the access efficiency of UE and reduce the power consumption of the UE.

To solve the foregoing technical problem, an embodiment of the present invention provides a random access method, including: receiving indication information indicating one or more BWPs for transmitting a random access response; detecting the random access response in a random access search space on a target BWP, the target BWP including one or more BWPs indicated by the indication information or a preset one or more BWPs.

Optionally, when the target BWP includes multiple BWPs, the detecting the random access response in the random access search space on the target BWP includes: receiving a PDCCH corresponding to a random access response on the plurality of BWPs, and determining that the random access response is successfully detected when the PDCCH corresponding to the random access response is successfully received on any one of the plurality of BWPs.

Optionally, the operation of detecting the random access response in the random access search space on the target BWP is triggered in response to the random access and is performed after the random access is performed.

Optionally, the random access is a CFRA type random access.

Optionally, the indication information is carried by physical layer signaling, RRC signaling, or MAC CE.

Optionally, the physical layer signaling is physical layer signaling that the base station triggers the UE to perform random access.

Optionally, the preset BWP or BWPs are determined by a predetermined agreement with the base station.

Optionally, the preset one or more BWPs include: the random access search space is configured on the special cell and the smallest BWP is identified or the largest BWP is identified in the activated BWPs.

Optionally, the target BWP is selected from one or more BWPs of a special cell.

Optionally, the target BWP associates all serving cells of a cell group corresponding to the special cell; or, the target BWP associates a part of the all serving cells; alternatively, the target BWP associates a specified uplink BWP or BWPs of a specified serving cell.

To solve the foregoing technical problem, an embodiment of the present invention further provides a random access apparatus, including: a receiving module, configured to receive indication information indicating one or more BWPs for transmitting a random access response; a detection module, configured to detect the random access response in a random access search space on a target BWP, where the target BWP includes one or more BWPs indicated by the indication information or one or more preset BWPs.

Optionally, when the target BWP includes a plurality of BWPs, the detecting module includes: a receiving determining sub-module, configured to receive a PDCCH corresponding to a random access response on the multiple BWPs, and determine that the random access response is successfully detected when the PDCCH corresponding to the random access response is successfully received on any one of the multiple BWPs.

Optionally, the detecting module detects the random access response in a random access search space on the target BWP in response to the random access being triggered and after the random access is performed.

Optionally, the random access is a CFRA type random access.

Optionally, the target BWP is selected from one or more BWPs of a special cell.

To solve the above technical problem, an embodiment of the present invention further provides a storage medium having stored thereon computer instructions, where the computer instructions execute the steps of the above method when executed.

In order to solve the above technical problem, an embodiment of the present invention further provides a terminal, including a memory and a processor, where the memory stores computer instructions capable of being executed on the processor, and the processor executes the computer instructions to perform the steps of the method.

Compared with the prior art, the technical scheme of the embodiment of the invention has the following beneficial effects:

the embodiment of the invention provides a random access method, which comprises the following steps: receiving indication information indicating one or more BWPs for transmitting a random access response; detecting the random access response in a random access search space on a target BWP, the target BWP including one or more BWPs indicated by the indication information or a preset one or more BWPs. Compared with the prior art, the scheme of the embodiment of the invention can reasonably optimize the random access mechanism when a plurality of activated BWPs exist, improve the access efficiency of the UE and reduce the power consumption of the UE. Furthermore, the indication information indicates a BWP or a preset BWP manner, so that the UE can determine the BWP to be detected in time after performing the random access operation, thereby accurately receiving the random access response on the basis of saving power consumption and improving the access success rate. And the base station can indicate different BWPs for receiving random access responses for the random access of different cells and different uplink BWPs, thereby improving the flexibility.

Further, the indication information is carried by physical layer signaling, RRC signaling, or MAC CE. Therefore, the BWP which needs to receive the random access response in the future can be appointed for the UE when the UE is triggered to carry out random access or the UE accesses the base station, and the UE is facilitated to receive the random access response on the proper BWP after the random access is carried out.

Further, the preset BWP or BWPs are determined by a predetermined agreement with the base station to pre-configure the BWP for the UE to receive the random access response by means of an implicit indication.

Drawings

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

fig. 2 is a schematic structural diagram of a random access apparatus according to an embodiment of the present invention;

FIG. 3 is a signaling interaction diagram of an exemplary application scenario in accordance with an embodiment of the present invention;

fig. 4 is a signaling interaction diagram of another exemplary application scenario in accordance with an embodiment of the present invention.

Detailed Description

Those skilled in the art understand that, as noted in the background, the existing random access mechanism cannot accommodate the scenario where multiple active BWPs exist in the serving cell at the same time.

Specifically, according to the specification of the existing protocol, in Release 15(Release 15, abbreviated as R15), at most 4 BWPs are configured for a User Equipment (UE) on one carrier, where only one BWP (Downlink, abbreviated as DL) and Uplink (UL) BWP) is active at most.

The conventional BWP configuration is defined as follows:

the base station may cause the UE to switch the activated BWP through Downlink Control Information (DCI). For a Primary serving Cell (PCell), an initial BWP is a BWP for initial access; for a Secondary serving Cell (SCell), the initial BWP is the first BWP that the UE operates when the SCell configured by the network is activated.

For symmetric spectrum, the switching of uplink and downlink BWP is independent. For asymmetric spectrum, the switching of uplink and downlink BWP is performed simultaneously. The switching between BWPs may be performed through Radio Resource Control (RRC) signaling, DCI, or a BWP inactivity timer. When one serving cell is configured with a BWP inactivity timer, the active BWP is switched to the network configured default BWP after the timer expires.

For a scenario that the UE performs random access in the secondary serving cell, the prior art only supports that the base station triggers the UE to send a preamble (preamble) on the designated resource through DCI.

For example, after the SCell belonging to a Master Cell Group (MCG) transmits a preamble, the UE needs to receive a Random Access Response (RAR) on the PCell, that is, decode a Physical Downlink Control Channel (PDCCH) according to a common search space of type 1(type 1).

For another example, after transmitting a preamble on an SCell belonging to a Secondary Serving Cell Group (SCG), the UE needs to receive an RAR on a Primary SCG Cell (PSCell).

If there are multiple active BWPs configured with random access search spaces in the PCell/PSCell, the prior art does not provide a targeted solution, so that the UE cannot reasonably and accurately select a suitable BWP from the multiple active BWPs configured with random access search spaces of a specific cell to receive RAR. Wherein, the special cell comprises a PCell and a PSCell.

Those skilled in the art understand that the solution of the embodiment of the present invention can reasonably optimize the random access mechanism when there are multiple active BWPs, improve the access efficiency of the UE, and reduce the power consumption of the UE.

Furthermore, the indication information indicates a BWP or a preset BWP manner, so that the UE can determine the BWP to be detected in time after performing the random access operation, thereby accurately receiving the random access response on the basis of saving power consumption and improving the access success rate.

Moreover, the base station can indicate different random access responses (BWPs) for receiving random access responses for random access of different cells and different uplink BWPs, thereby improving flexibility.

In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below.

Fig. 1 is a flowchart of a random access method according to an embodiment of the present invention. The scheme of the present embodiment may be applicable to a scenario in which the serving cell supports multiple active BWPs at the same time. The scheme of the embodiment can be applied to the user equipment side, such as performed by the UE.

Specifically, the Random Access in this embodiment may be a Random Access of a non-Contention Random Access (CFRA) mechanism. That is, the base station can identify the UE through a preamble (preamble) transmitted by the UE.

More specifically, referring to fig. 1, the random access method according to this embodiment may include the following steps:

a step S101 of receiving indication information indicating one or more BWPs for transmitting a random access response;

step S102, detecting the random access response in a random access search space on a target BWP, where the target BWP includes one or more BWPs indicated by the indication information or one or more preset BWPs.

Further, the indication information may be carried by a physical layer signaling, an RRC signaling, or a Media Access Control (MAC) Control unit (Control Element, CE for short). Therefore, when the UE is triggered to perform random access, or when the UE accesses the base station, or after the UE accesses the base station, the BWP which needs to receive the random access response in the future can be specified for the UE, and the UE can receive the random access response on the appropriate BWP after performing random access.

In a non-limiting embodiment, the physical layer signaling may be used to trigger the UE to perform random access, that is, the physical layer signaling for indicating the BWP or BWPs in this embodiment may be physical layer signaling sent by the base station to trigger the UE to perform random access.

For example, the physical layer signaling may include Downlink Control Information (DCI).

In a random access scenario initiated by a PDCCH order (PDCCH order), the base station includes an Identification (ID) of BWP for carrying the random access response in DCI for allocating random access resources to the UE. Thus, in response to receiving the DCI, the UE performs a random access operation and detects on the BWP indicated by the DCI to receive a corresponding random access response.

In a preferred embodiment, to reduce the number of blind DCI detections, step S102 may be triggered in response to a random access and performed after the random access is performed.

In another non-limiting embodiment, the RRC signaling and MAC CE may be sent to the UE when the UE establishes a connection with the base station. That is, when the UE initially accesses the base station, the base station configures the one or more BWPs for transmitting the random access response for the UE and indicates the BWPs to the UE through RRC signaling or MAC CE.

As a variation, the RRC signaling and the MAC CE may also be sent to the UE after the UE establishes a connection with the base station.

Further, the random access search space may be a type 1(type1) search space.

In one non-limiting embodiment, when the target BWP includes a plurality of BWPs, the step S102 may include: receiving a PDCCH corresponding to a random access response on the plurality of BWPs, and determining that the random access response is successfully detected when the PDCCH corresponding to the random access response is successfully received on any one of the plurality of BWPs.

The process of receiving the PDCCH corresponding to the random access response may include:

in order to send the Random Access response, the base station may send, on the target BWP, DCI scrambled with a Random Access Radio Network Temporary Identity (RA-RNTI) for performing Cyclic Redundancy Check (CRC), where the DCI is carried through a PDCCH.

To obtain the random access response, the UE may decode the PDCCH scrambled by the RA-RNTI on the target BWP to obtain the DCI, and then decode a Physical Downlink Shared Channel (PDSCH) according to the DCI to obtain the random access response.

In one non-limiting embodiment, the base station may further configure the one or more BWPs for sending the random access response for the UE by means of an implicit indication. For example, when the specific BWP is not indicated in the indication information received in step S101, the UE may detect the random access response in a random access search space on the preset one or more BWPs, where the target BWP is the preset one or more BWPs.

In a preferred embodiment, the preset BWP or BWPs may be determined by a predetermined agreement with the base station.

For example, the UE and the base station may agree in advance, and use the BWP with the smallest identification or the BWP with the largest identification among the active BWPs configured with the random access search space in the specific cell as the preset BWP.

The Special Cell (SpCell for short) may include a PCell and a PSCell, where the Special Cell corresponding to the MCG is the PCell and the Special Cell corresponding to the SCG is the PSCell.

In one non-limiting embodiment, the target BWP may be selected from one or more BWPs of a particular cell. For example, the target BWP may be selected from one or more downlink BWPs of a specific cell, and these BWPs may serve as alternative BWPs for the base station to send a random access response corresponding to the PDCCH.

In one non-limiting embodiment, the target BWP may be associated with all serving cells of a Cell Group (Cell Group) to which a particular Cell corresponds. That is, for random access by the UE at any serving cell of the cell group, the base station sends a random access response on the target BWP.

In a scenario where the UE transmits a preamble in the secondary serving cell and receives a random access response in the primary serving cell, the base station may configure one or more BWPs of all secondary serving cells in the cell group corresponding to the primary serving cell, where the BWPs are BWPs that the base station may use to transmit the random access response.

For example, assuming that the base station configures 4 downlink BWPs on the primary serving cell for the UE, where the identities of the 4 downlink BWPs are 0, 1, 2, and 3, respectively, and the 4 BWPs are all configured with the random access search space, the base station may indicate that all the secondary serving cells in the MCG correspond to the downlink BWP2 of the primary serving cell.

Therefore, for the random access performed by the UE in any one of the secondary serving cells of the MCG, the base station transmits the PDCCH corresponding to the random access response on the downlink BWP identified as 2 in the primary serving cell.

For another example, the base station may indicate that all the secondary serving cells in the MCG correspond to the downlink BWP2 and the downlink BWP3 of the primary serving cell.

Therefore, for the random access performed by the UE in any secondary serving cell, if only the downlink BWP3 of the PCell is activated at this time, the base station may send the PDCCH corresponding to the random access response on the downlink BWP identified as 3 in the primary serving cell.

As a variation, the target BWP may be associated with a portion of the total number of serving cells. That is, for random access by the UE on a serving cell, the base station may send a random access response on the target BWP associated with the serving cell.

Still taking the example where the UE transmits the preamble in the secondary serving cell and receives the random access response in the primary serving cell, the base station may configure one or more BWPs of the primary serving cell corresponding to one or more secondary serving cells specified in the MCG. Further, the base station may configure different BWPs of different secondary serving cells in the cell group corresponding to the primary serving cell.

For example, still assuming that the base station configures 4 downlink BWPs on the primary serving cell for the UE, the identities of the 4 downlink BWPs are 0, 1, 2, and 3, respectively, and the 4 BWPs are all configured with the random access search space, the base station may indicate that secondary serving cell a in the cell group corresponds to downlink BWP2 of the primary serving cell and secondary serving cell B corresponds to downlink BWP3 of the primary serving cell.

Therefore, for the random access performed by the UE in the secondary serving cell a, the base station may send a PDCCH corresponding to a random access response on the downlink BWP identified as 2 in the primary serving cell; for the random access performed by the UE in the secondary serving cell B, the base station may send a PDCCH corresponding to a random access response on the downlink BWP identified as 3 in the primary serving cell.

As another variation, the target BWP may be associated with a specified uplink BWP or uplink BWPs of a specified serving cell. That is, for random access by the UE on a designated uplink BWP of the designated serving cell, the base station may send a random access response on the target BWP associated with the uplink BWP.

Still taking the example where the UE transmits the preamble in the secondary serving cell and receives the random access response in the primary serving cell, the base station may configure one or more BWPs of the primary serving cell corresponding to the designated uplink BWP of the designated secondary serving cell in the cell group. Further, the base station may also configure different uplink BWPs of different secondary serving cells in the cell group to correspond to different BWPs of the primary serving cell.

For example, still assuming that the base station configures 4 downlink BWPs on the primary serving cell for the UE, the identities of the 4 downlink BWPs are 0, 1, 2, and 3, respectively, and the 4 BWPs are all configured with the random access search space, the base station may indicate that the uplink BWP i of the secondary serving cell a in the cell group corresponds to the downlink BWP 1 of the primary serving cell, and the uplink BWP j of the secondary serving cell a corresponds to the downlink BWP2 of the primary serving cell.

Therefore, for the random access performed by the UE on the uplink BWP i of the secondary serving cell a, the base station may send a PDCCH corresponding to the random access response on the downlink BWP identified as 1 in the primary serving cell; for the random access performed by the UE on the uplink BWP j of the secondary serving cell a, the base station may send a PDCCH corresponding to the random access response on the downlink BWP identified as 2 in the primary serving cell.

Therefore, by adopting the scheme of the embodiment, the random access mechanism in the presence of a plurality of activated BWPs can be reasonably optimized, the access efficiency of the UE is improved, and the power consumption of the UE is reduced. Furthermore, the indication information indicates a BWP or a preset BWP manner, so that the UE can determine the BWP to be detected in time after performing the random access operation, thereby accurately receiving the random access response on the basis of saving power consumption and improving the access success rate. Moreover, the base station can indicate different random access responses (BWPs) for receiving random access responses for random access of different cells and different uplink BWPs, thereby improving flexibility.

Fig. 2 is a schematic structural diagram of a random access apparatus according to an embodiment of the present invention. Those skilled in the art understand that the random access apparatus 2 according to this embodiment may be used to implement the method technical solution described in the embodiment shown in fig. 1.

Specifically, in this embodiment, the random access apparatus 2 may include: a receiving module 21, configured to receive indication information indicating one or more BWPs for sending a random access response; a detection module 22, configured to detect the random access response in a random access search space on a target BWP, where the target BWP includes one or more BWPs indicated by the indication information or one or more preset BWPs.

In one non-limiting embodiment, when the target BWP comprises a plurality of BWPs, the detection module 22 may comprise: a receiving determining sub-module 221, configured to receive a PDCCH corresponding to a random access response on the multiple BWPs, and determine that the random access response is successfully detected when the PDCCH corresponding to the random access response is successfully received on any one of the multiple BWPs.

In one non-limiting embodiment, the operation of the detection module to detect the random access response in the random access search space on the target BWP may be triggered in response to random access and performed after random access is performed.

In one non-limiting embodiment, the random access may be a CFRA type random access.

In one non-limiting embodiment, the indication information may be carried by physical layer signaling, RRC signaling, or MAC CE.

Further, the physical layer signaling may be physical layer signaling that triggers the UE to perform random access.

In one non-limiting embodiment, the preset BWP or BWPs may be determined by a predetermined agreement with the base station.

In one non-limiting embodiment, the preset one or more BWPs may include: the random access search space is configured on the special cell and the smallest BWP is identified or the largest BWP is identified in the activated BWPs.

In one non-limiting embodiment, the target BWP may be selected from one or more BWPs of a particular cell.

In one non-limiting embodiment, the target BWP may associate all serving cells of a cell group corresponding to a particular cell; alternatively, the target BWP may associate a part of the all serving cells; alternatively, the target BWP may be associated with a specified uplink BWP or uplink BWPs of a specified serving cell.

For more contents of the operation principle and the operation mode of the random access apparatus 2, reference may be made to the related description in fig. 1, and details are not repeated here.

In a typical application scenario, referring to fig. 3, the base station 32 may perform operation s1 to send physical layer signaling, where the physical layer signaling may carry a field to include the indication information, and the indication information is used to indicate an identifier of a target BWP for carrying the random access response. Wherein the target BWP may be a downstream BWP.

Assume that the domain is 2 in this scenario, that is, the base station sends a PDCCH corresponding to the random access response on the downlink BWP2 of the special cell.

Further, the physical layer signaling may be used to trigger the UE31 to perform random access operations.

Thus, in response to receiving the physical layer instruction, the UE31 may perform operation s2 to transmit a preamble, thereby performing a random access operation. For example, CFRA type random access may be performed.

In response to receiving the preamble transmitted by the UE31, the base station 32 may perform operation s3 to randomly access a corresponding PDCCH in response on downlink BWP 2.

Accordingly, the UE31 performs detection in the random access search space on the downlink BWP2 to obtain the random access response.

As a variation, the physical layer signaling may also not be configured with a specific id of the downlink BWP, that is, the base station 32 does not specify a specific value in the field of the physical layer signaling.

In response to receiving such indication information, the UE31 may determine that detection is required on the preset downlink BWP. Correspondingly, the base station 32 may also send the PDCCH corresponding to the random access response on the preset downlink BWP.

For example, the preset downlink BWP may be a BWP with a random access search space configured on a serving cell and the minimum identifier or the maximum identifier among activated downlink BWPs.

In another exemplary application scenario, referring to fig. 4, the base station 42 may perform operation s 1' to transmit RRC signaling or MAC CE, where the indication information may be included in the RRC signaling or MAC CE, and the indication information is used to indicate an identity of a target BWP for carrying the random access response. Wherein the target BWP may be a downstream BWP.

When the number of the target BWPs is multiple, the downlink BWPs may serve as alternative BWPs for the base station 42 to send a random access response corresponding to the PDCCH.

After the UE41 performs operation s2 'to transmit the preamble to start random access, the base station 42 may perform operation s 3' to select one or more downlink BWPs from the target BWPs configured to the UE41 to transmit a PDCCH corresponding to a random access response. Wherein the UE41 performs a random access which may be of CFRA type.

Accordingly, the UE41 performs detection on all target BWPs after performing the operation s 2', and determines that the reception is successful when the PDCCH corresponding to the random access response is successfully received on any one of the BWPs.

As a variation, the base station 42 may configure the target BWP for the UE41 by means of an implicit indication. That is, if the specific identity of the target BWP is not configured in the RRC signaling or the MAC CE, the UE41 may determine that detection needs to be performed on one or more preset BWPs after performing random access.

Further, the embodiment of the present invention further discloses a storage medium, on which computer instructions are stored, and when the computer instructions are executed, the method technical solution described in the embodiment shown in fig. 1 is executed. Preferably, the storage medium may include a computer-readable storage medium such as a non-volatile (non-volatile) memory or a non-transitory (non-transient) memory. The storage medium may include ROM, RAM, magnetic or optical disks, etc.

Further, an embodiment of the present invention further discloses a terminal, which includes a memory and a processor, where the memory stores a computer instruction capable of running on the processor, and the processor executes the technical solution of the method in the embodiment shown in fig. 1 when running the computer instruction. Preferably, the terminal may be the User Equipment (UE).

Although the present invention is disclosed above, the present invention is not limited thereto. Various changes and modifications may be effected therein by one skilled in the art without departing from the spirit and scope of the invention as defined in the appended claims.

Claims

1. A random access method is applied to user equipment, and is characterized by comprising the following steps:

receiving indication information indicating one or more partial bandwidths BWP for transmitting a random access response;

sending a lead code in the secondary serving cell;

detecting a random access response in a random access search space on a target BWP, the random access response corresponding to the preamble, the target BWP including one or more BWPs indicated by the indication information or preset one or more BWPs; the target BWP is one or more BWPs of a special cell; the special cell includes at least one of a primary serving cell and a primary and secondary serving cell.

2. The random access method according to claim 1, wherein when the target BWP comprises a plurality of BWPs, the random access search space detection on the target BWP comprises:

and receiving a Physical Downlink Control Channel (PDCCH) corresponding to a random access response on the plurality of BWPs, and determining that the random access response is successfully detected when the PDCCH corresponding to the random access response is successfully received on any one of the plurality of BWPs.

3. The random access method of claim 1, wherein the operation of detecting the random access response in the random access search space on the target BWP is triggered in response to random access and is performed after random access is performed.

4. The random access method according to claim 3, wherein the random access is a non-contention random access, CFRA, type of random access.

5. The random access method of claim 1, wherein the indication information is carried by physical layer signaling, Radio Resource Control (RRC) signaling, or Medium Access Control (MAC) control element (MAC CE).

6. The random access method of claim 5, wherein the physical layer signaling is physical layer signaling that triggers a UE to perform random access.

7. The random access method of claim 1, wherein the preset one or more BWPs are determined by a predetermined agreement with a base station.

8. The random access method according to any of claims 1 to 7, wherein the pre-provisioned one or more BWPs comprise:

the random access search space is configured on the special cell and the smallest BWP is identified or the largest BWP is identified in the activated BWPs.

9. A random access apparatus, comprising:

a receiving module, configured to receive indication information indicating one or more partial bandwidths BWPs for transmitting a random access response;

a sending module, configured to send a preamble in the secondary serving cell;

a detection module for detecting a random access response in a random access search space on a target BWP, the random access response corresponding to the preamble, the target BWP including one or more BWPs indicated by the indication information or one or more preset BWPs; the target BWP is one or more BWPs of a special cell; the special cell includes at least one of a primary serving cell and a primary and secondary serving cell.

10. A storage medium having stored thereon computer instructions, which when executed by a processor, perform the steps of the method of any one of claims 1 to 8.

11. A terminal comprising a memory and a processor, the memory having stored thereon computer instructions executable on the processor, wherein the processor, when executing the computer instructions, performs the steps of the method of any one of claims 1 to 8.